CN113531867B

CN113531867B - Air conditioner, air conditioner control method and device, air conditioner and readable storage medium

Info

Publication number: CN113531867B
Application number: CN202110919749.6A
Authority: CN
Inventors: 朱声浩; 李健锋; 刘帅帅; 李东
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Wuhan HVAC Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Wuhan HVAC Equipment Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-05-03
Anticipated expiration: 2041-08-11
Also published as: CN113531867A

Abstract

The application provides an air conditioner, an air conditioner control method and device, an air conditioner and a readable storage medium. The air conditioning apparatus includes: a compressor including an enthalpy injection port; a first heat exchanger; the first refrigerant pipeline is communicated with the first heat exchanger and the enthalpy spraying port; the second heat exchanger is arranged on the first refrigerant pipeline; the throttling assembly is arranged on the first refrigerant pipeline and positioned between the second heat exchanger and the first heat exchanger; the first temperature detecting piece is used for collecting a first temperature between the second heat exchanger and the throttling assembly; the second temperature detecting piece is used for collecting a second temperature between the second heat exchanger and the enthalpy spraying port; and the controller is used for controlling the throttling assembly to work according to the first temperature and the second temperature. This application can effectually avoid "liquid hit" phenomenon, improves the reliability of compressor jet enthalpy gain, guarantees simultaneously that air conditioning equipment can homoenergetic steady operation under various operating modes, improves air conditioning equipment's use and experiences.

Description

Air conditioner, air conditioner control method and device, air conditioner and readable storage medium

Technical Field

The application relates to the technical field of air conditioning equipment, in particular to air conditioning equipment, an air conditioning control method and device, an air conditioner and a readable storage medium.

Background

In the related art, an enhanced vapor injection loop of air conditioning equipment is adjusted through a single electronic expansion valve, and under partial working conditions, if the conditions of incomplete refrigerant evaporation, blocking of the electronic expansion valve and the like occur, liquid refrigerant can return to a compressor, liquid impact is formed, and the reliability of the compressor is affected.

Disclosure of Invention

The present application is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the present application proposes an air conditioning apparatus.

A second aspect of the present application provides an air conditioner control method.

A third aspect of the present application provides an air conditioning control apparatus.

A fourth aspect of the present application provides an air conditioner.

A fifth aspect of the present application provides an air conditioner.

A sixth aspect of the present application sets forth a readable storage medium.

In view of this, a first aspect of the present application provides an air conditioning apparatus including: a compressor including an enthalpy injection port; a first heat exchanger; the first refrigerant pipeline is communicated with the first heat exchanger and the enthalpy spraying port; the second heat exchanger is arranged on the first refrigerant pipeline; the throttling assembly is arranged on the first refrigerant pipeline and positioned between the second heat exchanger and the first heat exchanger; the first temperature detecting piece is used for acquiring a first temperature between the second heat exchanger and the throttling assembly; the second temperature detecting piece is used for collecting a second temperature between the second heat exchanger and the enthalpy spraying port; and the controller is used for controlling the throttling assembly to work according to the first temperature and the second temperature.

In the technical scheme, the air conditioning equipment comprises a compressor, a first heat exchanger, a first refrigerant pipeline and a second heat exchanger. The air conditioning equipment is provided with an enhanced vapor injection system, the first refrigerant pipeline is an enhanced vapor injection pipeline and is specifically communicated with the first heat exchanger and an enthalpy injection port of the compressor, when the first heat exchanger is a condenser and needs enthalpy increase, a high-temperature high-pressure air pressure refrigerant discharged by the compressor enters the first heat exchanger, is condensed in the first heat exchanger to form a liquid refrigerant, and is divided into two paths after throttling and pressure reduction through an expansion valve.

One path of refrigerant enters the third heat exchanger to be evaporated, and the other path of refrigerant returns to an enthalpy spraying port of the compressor through the first refrigerant pipeline. The first refrigerant pipeline enters the second heat exchanger after being throttled and cooled by the throttling assembly, exchanges heat with another path of refrigerant in the second heat exchanger, absorbs heat in the other path of refrigerant, and then enters the enthalpy spraying port of the compressor after becoming an overheated refrigerant.

In the process, a first temperature is acquired through the first temperature detecting part, wherein the first temperature is specifically the temperature between the second heat exchanger and the throttling assembly, namely the temperature of the refrigerant before the first refrigerant pipeline exchanges heat through the second heat exchanger.

Meanwhile, a second temperature is acquired through a second temperature detecting piece, wherein the second temperature is specifically the temperature between the second heat exchanger and the enthalpy spraying port, namely the temperature of the refrigerant after the first refrigerant pipeline exchanges heat through the second heat exchanger.

It can be understood that the first temperature is a temperature of the refrigerant which is further reduced after throttling, and thus the first temperature is lower, and the second temperature is a temperature of the superheated refrigerant which exchanges heat with another path of the refrigerant, and thus the second temperature is higher.

According to first temperature and second temperature, can confirm the heat transfer effect of the refrigerant in the first refrigerant pipeline around through the second heat exchanger, therefore, through based on first temperature and second temperature, throttle subassembly to setting up on the first refrigerant pipeline controls, thereby can guarantee the jet enthalpy addition effect effectively, special operating mode appears in the air conditioner, when the heat transfer effect that leads to the second heat exchanger reduces, can in time end the jet enthalpy return circuit, avoid getting into the jet enthalpy mouth because of the unable liquid refrigerant that fully absorbs heat and lead to of the refrigerant in the first refrigerant pipeline, thereby effectually avoid "liquid hammer" phenomenon, improve the reliability of compressor jet enthalpy addition, guarantee air conditioning equipment simultaneously and can all can the steady operation under various operating modes, improve air conditioning equipment's use and experience.

In addition, the air conditioning equipment in the above technical solution provided by the present application may further have the following additional technical features:

in the above technical solution, the throttle assembly includes: an electromagnetic valve; and the first expansion valve is arranged between the electromagnetic valve and the second heat exchanger.

In the technical scheme, the throttling assembly specifically comprises an electromagnetic valve and a first expansion valve, wherein the first expansion valve is used for further throttling and cooling the refrigerant in the first refrigerant pipeline, so that the temperature of the refrigerant in the first refrigerant pipeline is lower than that of the refrigerant between the first heat exchanger and the third heat exchanger, and after heat exchange is carried out by the second heat exchanger, the refrigerant in the first refrigerant pipeline is formed into an overheated gaseous refrigerant.

Meanwhile, the electromagnetic valve is arranged on the first refrigerant pipeline, and when the first expansion valve is opened to a certain opening degree, the electromagnetic valve is synchronously opened. When the enhanced vapor injection is not needed, or the refrigerant in the first refrigerant pipeline is detected to pass through the second heat exchanger, and under the condition that the liquid refrigerant still possibly exists, the electromagnetic valve and the first expansion valve are synchronously stopped, on one hand, the refrigerant can be prevented from passing through the first expansion valve, the residual liquid refrigerant in the first refrigerant pipeline enters the vapor injection port of the compressor, so that the liquid impact phenomenon can be more effectively prevented, on the other hand, when the electronic expansion valve breaks down, extra insurance is provided, the electronic expansion valve can be prevented from being normally closed, or faults such as reversal, blocking, no response and the like occur, the condition that the enhanced vapor injection system can not be closed in time occurs, so that the reliability of the enhanced vapor injection of the compressor is further improved, meanwhile, the air conditioning equipment can stably run under various working conditions, and the use experience of the air conditioning equipment is improved.

In any of the above technical solutions, the throttling assembly further includes: and the capillary tube is arranged between the electromagnetic valve and the first expansion valve.

In the technical scheme, the throttling assembly further comprises a capillary tube, and the capillary tube is arranged between the electromagnetic valve and the first expansion valve. Specifically, the high-temperature refrigerant discharged by the compressor enters the first refrigerant pipeline after being condensed by the first heat exchanger, the temperature of the refrigerant in the first refrigerant pipeline can be reduced after the refrigerant is throttled by the first expansion valve, and meanwhile, the refrigerant can be throttled and cooled further under the throttling action of the capillary tube after being throttled and cooled by the first expansion valve, so that the throttling effect can be ensured, the temperature of the refrigerant in the first refrigerant pipeline is further reduced, and the cooling effect of the refrigerant in the refrigerant pipeline between the first heat exchanger and the third heat exchanger is met.

Meanwhile, double protection can be formed between the capillary tube and the electromagnetic valve, the risk that liquid refrigerant directly enters the enthalpy injection port of the compressor can be further reduced, even if the first expansion valve breaks down, and the first expansion valve cannot normally throttle or is closed, the capillary tube can also play a sufficient throttling role, and under the cooperation with the electromagnetic valve, throttling is realized through the capillary tube, and switching-on or switching-off of the enhanced vapor injection system is realized through the electromagnetic valve, so that normal work of the enhanced vapor injection system can be still ensured under the condition that the first expansion valve cannot normally work, the reliability of the enhanced vapor injection system of the compressor is further improved, the operation stability of air conditioning equipment is improved, and user experience is ensured.

In any of the above technical solutions, the compressor further includes an exhaust port and a return port, and the air conditioning apparatus further includes: a third heat exchanger; and the second refrigerant pipeline is communicated with the exhaust port, the first heat exchanger, the third heat exchanger and the return port in sequence, and exchanges heat with the first refrigerant pipeline through the second heat exchanger.

In this technical scheme, the compressor includes the gas vent, still includes the return-air inlet. The air conditioning equipment comprises a third heat exchanger and a second refrigerant pipeline. The exhaust port of the compressor is connected with the first heat exchanger through a second refrigerant pipeline, the outlet of the first heat exchanger is connected with the inlet of the third heat exchanger through the second refrigerant pipeline, the outlet of the third heat exchanger is connected with the air return port of the compressor through the second refrigerant pipeline, and the compressor, the first heat exchanger and the third heat exchanger are sequentially communicated through the second refrigerant pipeline. When the first heat exchanger is a condenser and the third heat exchanger is an evaporator, the second expansion valve is fully opened or has a certain opening degree, the refrigerant is compressed by the compressor to form a high-temperature and high-pressure gaseous refrigerant, the gaseous refrigerant enters the first heat exchanger and is condensed into a liquid state, and then exchanges heat by the second heat exchanger to obtain a low-temperature refrigerant, the low-temperature refrigerant enters the third heat exchanger to evaporate and absorb heat, and an overheated refrigerant formed after absorbing heat returns to the compressor to form refrigerant circulation, so that the refrigeration function of the air conditioning equipment is realized, and the use experience of the air conditioning equipment during refrigeration is ensured.

In any one of the above technical solutions, the air conditioning apparatus further includes: the second expansion valve is arranged on the second refrigerant pipeline and positioned between the first heat exchanger and the second heat exchanger;

and the third expansion valve is arranged on the second refrigerant pipeline and is positioned between the second heat exchanger and the third heat exchanger.

In the technical scheme, the air conditioning equipment further comprises a second expansion valve, and the second expansion valve is arranged on a second refrigerant pipeline between the first heat exchanger and the throttling assembly. Specifically, when the first heat exchanger is a condenser and the third heat exchanger is an evaporator, high-temperature and high-pressure refrigerants are discharged from an exhaust port of the compressor, enter the first heat exchanger through the second refrigerant pipeline, and are condensed into liquid refrigerants in the first heat exchanger. The liquid refrigerant is further discharged out of the first heat exchanger through the second refrigerant pipeline, and the liquid refrigerant discharged from the first heat exchanger is formed into a throttled low-temperature refrigerant under the throttling action of the second expansion valve.

And a part of the low-temperature refrigerants enter the first refrigerant pipeline and are further throttled by the throttling assembly to obtain the refrigerants with lower temperature. The other part of the low-temperature refrigerant directly enters the second heat exchanger and exchanges heat with the refrigerant with lower temperature in the first refrigerant pipeline through the second heat exchanger, so that the refrigerant in the first refrigerant pipeline absorbs heat and then forms an overheated refrigerant, and returns to the enthalpy spraying port of the compressor, and meanwhile, the refrigerant in the second refrigerant pipeline enters the third heat exchanger to evaporate and absorb heat after being further pulled down, so that refrigeration is realized, and the use experience of the air conditioning equipment during refrigeration is guaranteed.

When the first heat exchanger is an evaporator and the third heat exchanger is a condenser, the third electronic expansion valve is fully opened or has a certain opening degree, the refrigerant is compressed by the compressor to form a high-temperature high-pressure gaseous refrigerant, the gaseous refrigerant is condensed into a liquid refrigerant in the first heat exchanger, the liquid refrigerant enters the second heat exchanger after passing through the second expansion valve and then is divided into two paths, and the first path enters the third heat exchanger through the second expansion valve; the second path passes through the first refrigerant pipeline, further throttles the cooling under the throttling of the throttling assembly, and exchanges heat with the refrigerant in the second refrigerant pipeline in the second heat exchanger to form gaseous superheated refrigerant which enters the enthalpy injection port of the compressor, the refrigerant in the second refrigerant pipeline enters the first heat exchanger after being throttled, decompressed and cooled by the third electronic expansion valve, evaporates and absorbs heat and then becomes gaseous refrigerant which returns to the return air port of the compressor, refrigerant circulation is formed, the heating function of the air conditioning equipment is realized, and the use experience of the air conditioning equipment during heating is guaranteed.

In any of the above technical solutions, the second heat exchanger is a plate-type second heat exchanger.

In this technical scheme, the second heat exchanger is board-like second heat exchanger, board-like second heat exchanger compact structure, the space that occupies is less, can realize the heat exchange efficiency between first refrigerant pipeline and the second refrigerant pipeline high-efficiently simultaneously, make in the first refrigerant pipeline, the refrigerant of further throttle cooling through the throttling assembly can fully absorb the heat of refrigerant in the second refrigerant pipeline, thereby make the refrigerant in the first refrigerant pipeline get back to the spray-welding mouth of compressor after forming into overheated refrigerant, thereby prevent "liquid hammer" phenomenon effectively, guarantee the reliability of compressor jet-propelled enthalpy that increases, guarantee air conditioning equipment's operation stability, improve user's use and experience.

A second aspect of the present application provides an air conditioning control method for controlling an air conditioner as provided in the first aspect, the air conditioning control method comprising:

collecting a first temperature between the second heat exchanger and the throttling assembly and a second temperature between the second heat exchanger and the enthalpy spraying port; and controlling the throttle assembly to work according to the first temperature and the second temperature.

In the technical scheme, the air conditioning equipment comprises a compressor, a first heat exchanger, a first refrigerant pipeline and a second heat exchanger. The air conditioning equipment is provided with an enhanced vapor injection system, the first refrigerant pipeline is communicated with the first heat exchanger and an enthalpy injection port of the compressor, when the enthalpy is required to be increased, a high-temperature high-pressure air pressure refrigerant discharged by the compressor enters the first heat exchanger, is condensed in the first heat exchanger to form a liquid refrigerant, and is throttled and depressurized by the expansion valve to be divided into two paths.

One path of refrigerant enters the third heat exchanger to be evaporated, and the other path of refrigerant returns to an enthalpy spraying port of the compressor through the first refrigerant pipeline. The first refrigerant pipeline enters the second heat exchanger after being throttled and cooled by the throttling component, exchanges heat with another path of refrigerant in the second heat exchanger, absorbs heat in the other path of refrigerant, and then enters the enthalpy spraying port of the compressor after being changed into overheated refrigerant.

In the process, a first temperature and a second temperature are collected, wherein the first temperature is specifically the temperature between the second heat exchanger and the throttling assembly, namely the temperature of the refrigerant before the first refrigerant pipeline exchanges heat through the second heat exchanger, and the second temperature is specifically the temperature between the second heat exchanger and the enthalpy spraying port, namely the temperature of the refrigerant after the first refrigerant pipeline exchanges heat through the second heat exchanger.

In the above technical solution, the throttling assembly includes a solenoid valve and a first expansion valve, and controls the throttling assembly to operate according to a first temperature and a second temperature, including:

controlling the electromagnetic valve to be opened, and controlling the first expansion valve to be opened by a preset opening degree; determining a difference between the first temperature and the second temperature; controlling the opening degree of the first expansion valve to decrease by a first opening degree in a case where the difference is smaller than a first threshold value; controlling the opening degree of the first expansion valve to increase by a second opening degree in the case that the difference is greater than a second threshold value; the second threshold value is larger than the first threshold value, and the first opening degree is larger than the second opening degree.

In the technical scheme, the throttling assembly specifically comprises an electromagnetic valve and a first expansion valve, wherein the first expansion valve is used for further throttling and cooling the refrigerant in the first refrigerant pipeline, so that the temperature of the refrigerant in the first refrigerant pipeline is lower than that of the refrigerant between the first heat exchanger and the third heat exchanger, and after heat exchange is carried out by the second heat exchanger, the refrigerant in the first refrigerant pipeline is formed into an overheated gaseous refrigerant. Meanwhile, the electromagnetic valve is arranged on the first refrigerant pipeline and used for controlling the on-off of the first refrigerant pipeline, namely the on-off of the enhanced vapor injection pipeline.

When the throttling assembly is controlled to start working, whether the enhanced vapor injection pipeline, namely the first refrigerant pipeline, needs to be opened or not can be judged according to a main program of the air conditioning system. If the system judges according to the current load that the enhanced vapor injection function needs to be started, the electromagnetic valve is controlled to be opened at first, and the first expansion valve is controlled to be opened to a preset opening degree. At this time, the refrigerant flowing out of the first heat exchanger can enter the first refrigerant pipeline after being throttled by the throttling element.

Furthermore, a first temperature value and a second temperature value are collected, and a difference value between the first temperature and the second temperature is determined, namely, a difference value between the temperature of the refrigerant in the first refrigerant pipeline before entering the second heat exchanger for heat exchange and the temperature of the refrigerant after entering the second heat exchanger for heat exchange is calculated, and the difference value can reflect the heat exchange effect of the first refrigerant pipeline, namely the enhanced vapor injection pipeline and the normal refrigerant circulation pipeline of the air conditioning equipment.

If the difference value of the first temperature and the second temperature is smaller than a preset first threshold value, the enhanced vapor injection pipeline, namely the first pipeline, and a general refrigerant loop of the air conditioning equipment, namely the heat exchange effect between the second pipelines is poor, possibly, the refrigerant temperature of the first pipeline is not low enough, the opening degree of the first expansion valve is controlled to reduce the preset first opening degree, so that the throttling effect is improved, the refrigerant temperature in the first pipeline is further reduced, the refrigerant in the first pipeline can better absorb the heat of the refrigerant in the second pipeline, and the heat exchange effect is improved.

And if the difference value of the first temperature and the second temperature is greater than a preset second threshold value, the temperature difference between the first pipeline and the second pipeline is over large, and at the moment, the opening degree of the first expansion valve is controlled to increase the preset second opening degree so as to reduce the throttling effect and further increase the temperature of the refrigerant in the first pipeline.

And if the difference value between the first temperature and the second temperature is less than or equal to the second threshold value and is greater than or equal to the first threshold value, the enhanced vapor injection system is proved to be well operated, and the opening degree of the first expansion valve is maintained unchanged.

It can be understood that, because when adjusting the expansion valve aperture, increase the operation of expansion valve aperture, cause the superheat degree to reduce easily, thereby influence the reliability of jet enthalpy increasing system, consequently when adjusting the expansion valve aperture, make first aperture be greater than the second aperture, that is to say, the regulating variable when reducing the expansion valve aperture, be greater than the regulating variable when increasing the expansion valve aperture, can prevent that the system that the superheat degree reduction leads to is unstable, can also avoid adjusting first expansion valve aperture many times repeatedly, and then guarantee that air conditioning equipment's operation is stable.

In some embodiments of the present application, the air conditioning control method further includes: under the condition that the opening degree of the first expansion valve is smaller than or equal to a first opening degree threshold value and the difference value meets a preset condition, closing the first expansion valve and the electromagnetic valve, and adding 1 to the count value; wherein the preset conditions are as follows: the duration of the difference value is less than or equal to a first difference value and reaches a first preset duration, or the duration of the difference value is less than or equal to a second difference value and reaches a second preset duration, the first difference value is less than the second difference value, and the first preset duration is less than the second preset duration.

In the embodiment of the present application, the first opening degree threshold value is a minimum opening degree value of the first expansion valve. After the opening degree of the first expansion valve is less than or equal to the first opening degree threshold, the first expansion valve will not be able to further reduce the opening degree to improve the throttling effect. At this time, whether the difference value meets a preset condition is judged, specifically, the preset condition is that the difference value between the first temperature and the second temperature is continuously smaller than the first difference value, and the duration time smaller than the first difference value reaches a first preset duration time, or the difference value between the first temperature and the second temperature is continuously smaller than a second difference value, and the duration time smaller than the second difference value reaches a second preset duration time.

The second difference is greater than the first difference, the second preset time is greater than the first preset time, and the enhanced vapor injection system can be started only on the premise that the enhanced vapor injection system of the compressor is stable in operation.

If the opening degree of the first expansion valve reaches the minimum opening degree and meets the preset condition, the condition that the enhanced vapor injection pipeline is continuously opened at the moment is judged, the operation stability of the compressor is influenced, and therefore the first expansion valve and the electromagnetic valve are closed, namely the enhanced vapor injection pipeline (the first pipeline) is closed, so that the liquid refrigerant is prevented from returning to the compressor through the first pipeline to cause liquid impact faults.

After closing the enhanced vapor injection system, add 1 with the count value, wherein, the count value is used for recording because of the unable number of times that satisfies the system steady operation of enhanced vapor injection system, can judge whether the condition of closing the enhanced vapor injection system appears in the short-term many times according to the count value to whether the enhanced vapor injection system of definite air conditioner breaks down, or whether the actual work condition of air conditioner satisfies the enhanced vapor injection system, and then further improve the stability and the reliability of enhanced vapor injection system.

In any of the above solutions, after closing the first expansion valve and the solenoid valve, the method further comprises:

starting timing under the condition that the count value is N, wherein N is a positive integer less than 4; when the timing duration reaches a third preset duration and an enthalpy increasing control signal is received, controlling the electromagnetic valve to be opened, and controlling the first expansion valve to be opened to a target opening degree; the target opening is the difference between a preset opening and an adjustment value, and the adjustment value is 8 multiplied by N.

In the technical scheme, N is a count value, specifically, the number of times of forcibly closing the first expansion valve and the solenoid valve. If N is less than 4, after the solenoid valve and the first expansion valve are closed, a timer is started, and the closing time length of the solenoid valve and the first expansion valve, namely the enhanced vapor injection pipeline, is recorded.

When the timing duration reaches a preset third duration, if an enthalpy-increasing control signal from the air conditioner control system is received again, namely, when the air conditioner has a demand for improving the refrigeration effect through the enhanced vapor injection system, the electromagnetic valve is opened again, and meanwhile, the first expansion valve is opened according to the target opening degree, so that the enhanced vapor injection pipeline is opened.

The target opening is specifically the difference obtained by subtracting the adjustment value from the preset opening, that is, after the enhanced vapor injection pipeline is forcibly closed, if the enhanced vapor injection pipeline needs to be opened again, the initial opening of the first expansion valve needs to be reduced, so that the enhanced vapor injection pipeline is opened with a higher throttling effect, and the enhanced vapor injection pipeline, that is, the temperature of the refrigerant in the first refrigerant pipeline is further reduced, so that the enhanced vapor injection pipeline can absorb more heat from the refrigerant in the second refrigerant pipeline when exchanging heat with the refrigerant in the second refrigerant pipeline, thereby obtaining an overheated refrigerant, preventing the refrigerant in the first refrigerant pipeline from absorbing heat insufficiently and causing residual liquid refrigerant to return to an enthalpy injection port of the compressor, and preventing the liquid impact phenomenon from occurring.

A specific value of the adjustment value is determined according to the count value N, and specifically, the adjustment value is 8 × N, that is, assuming that the preset opening degree is 50 and N is 2, the adjustment value is 8 × 2 — 16, and the target opening degree is 50-16 — 34. It can be understood that the unit is omitted in calculating the target opening degree for the convenience of calculation.

This application embodiment is through closing the enhanced vapor injection pipeline (first pipeline) according to the force, also closes the number of times of first expansion valve and solenoid valve, adjusts and opens the enhanced vapor injection pipeline next time, also is the first pipeline formula, the initial aperture of first expansion valve to prevent that the refrigerant heat absorption in the first refrigerant pipeline is insufficient and lead to remaining liquid refrigerant to get back to the injection enthalpy mouth of compressor, further improve the reliability of the enhanced vapor injection of compressor.

In any of the above technical solutions, when the count value is greater than or equal to 4, the corresponding failure information is generated.

In the technical scheme, if the count value is greater than or equal to 4, it indicates that a situation that an enhanced vapor injection pipeline (a first refrigerant pipeline) needs to be closed, that is, a first expansion valve and an electromagnetic valve are closed, occurs for multiple times within a period of time, and a failure of the enhanced vapor injection system, such as failure of the electronic expansion valve, inversion of the electronic expansion valve, and the like, is likely to occur, and corresponding failure information is generated at this time, so that a user or a technician is prompted that the enhanced vapor injection system fails and needs to be maintained.

It can be understood that, in some embodiments, when the enhanced vapor injection system fails, the normal operation of the air conditioning equipment may be maintained, but the first refrigerant pipeline is cut off, that is, the first expansion valve and the solenoid valve are controlled to be continuously closed, so as to ensure that the liquid refrigerant does not enter the compressor through the enhanced vapor injection pipeline, and maintain the reliability of the operation of the air conditioner.

In other embodiments, the first expansion valve and the electromagnetic valve may fail at the same time, which may result in the first refrigerant pipeline being unable to be cut off, and at this time, the air conditioning equipment may be controlled to stop, thereby avoiding the damage to the compressor caused by the liquid impact phenomenon, and further improving the reliability of the air conditioning equipment.

A third aspect of the present application provides an air conditioning control apparatus for controlling an air conditioning device according to the first aspect, the control apparatus including:

the acquisition module is used for acquiring a first temperature between the second heat exchanger and the throttling assembly and a second temperature between the second heat exchanger and the enthalpy injection port; and the control module is used for controlling the throttle component to work according to the first temperature and the second temperature.

According to first temperature and second temperature, can confirm the heat transfer effect of the refrigerant in the first refrigerant pipeline around through the second heat exchanger, therefore, through based on first temperature and second temperature, control the throttling assembly that sets up on the first refrigerant pipeline, thereby can guarantee jet enthalpy addition effect effectively, special operating mode appears in the air conditioner, when the heat transfer effect that leads to the second heat exchanger reduces, can in time end jet enthalpy addition return circuit, avoid because of the unable liquid refrigerant that fully absorbs heat and lead to in the first refrigerant pipeline gets into the enthalpy jet mouth, thereby effectually avoid "liquid attack" phenomenon, improve the reliability of compressor jet enthalpy addition, guarantee simultaneously that air conditioning equipment can all steady operation under various operating modes, improve air conditioning equipment's use experience.

The fourth aspect of the present application provides an air conditioner, where the air conditioner includes the air conditioner control device provided in the third aspect of the present invention, and therefore, the air conditioner also includes all the beneficial effects of the air conditioner control device provided in the third aspect of the present invention, and details are not repeated here to avoid repetition.

The fifth aspect of the present application provides an air conditioner, comprising: a memory having a program or instructions stored thereon; the processor is configured to implement the steps of the control method for the air conditioning equipment provided in the foregoing second aspect when executing the program or the instructions, and therefore, the air conditioner also includes all the beneficial effects of the control method for the air conditioning equipment provided in the foregoing third aspect, and details are not described here again to avoid repetition.

A sixth aspect of the present application provides a readable storage medium, on which a program or an instruction is stored, where the program or the instruction, when executed by a processor, implements the steps of the method for controlling an air conditioning apparatus provided in the foregoing second aspect, and therefore, the readable storage medium also includes all the beneficial effects of the method for controlling an air conditioning apparatus provided in the foregoing third aspect, and details are not repeated here to avoid repetition.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram illustrating a refrigerant pipeline of an air conditioning apparatus according to an embodiment of the present application;

fig. 2 illustrates one of flowcharts of an air conditioner control method according to an embodiment of the present application;

fig. 3 shows a second flowchart of an air conditioner control method according to an embodiment of the present application;

fig. 4 illustrates a third flowchart of an air conditioner control method according to an embodiment of the present application;

fig. 5 is a block diagram showing a configuration of an air conditioning control apparatus according to an embodiment of the present application.

Reference numerals:

100 compressor, 1002 enthalpy injection port, 102 first heat exchanger, 104 first refrigerant pipeline, 106 second heat exchanger, 108 throttling component, 1082 solenoid valve, 1084 first expansion valve, 1086 capillary tube, 110 first temperature detecting piece, 112 second temperature detecting piece, 114 third heat exchanger, 116 second refrigerant pipeline, 118 second expansion valve and 120 third expansion valve.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

The air conditioner, the air conditioner control method and apparatus, the air conditioner, and the readable storage medium according to some embodiments of the present application are described below with reference to fig. 1 to 5.

Example one

In some embodiments of the present application, an air conditioning apparatus is provided, and fig. 1 shows a refrigerant pipeline schematic diagram of an air conditioning apparatus according to an embodiment of the present application, and as shown in fig. 1, the air conditioning apparatus includes: compressor 100, including enthalpy injection port 1002; a first heat exchanger 102; the first refrigerant pipeline 104 is communicated with the first heat exchanger 102 and the enthalpy spraying port 1002; the second heat exchanger 106 is arranged on the first refrigerant pipeline 104; the throttling assembly 108 is arranged on the first refrigerant pipeline 104 and positioned between the second heat exchanger 106 and the first heat exchanger 102; a first temperature sensing member 110 for sensing a first temperature between the second heat exchanger 106 and the throttling assembly 108; the second temperature detecting part 112 is used for collecting a second temperature between the second heat exchanger 106 and the enthalpy injection port 1002; and a controller for controlling the operation of the throttling assembly 108 according to the first temperature and the second temperature.

In the embodiment of the present application, the air conditioning apparatus includes a compressor 100, a first heat exchanger 102, a first refrigerant pipeline 104, and a second heat exchanger 106. The air conditioning equipment is provided with an enhanced vapor injection system, the first refrigerant pipeline 104 is an enhanced vapor injection pipeline, the first refrigerant pipeline 104 is specifically communicated with the first heat exchanger 102 and an enthalpy injection port 1002 of the compressor 100, when the first heat exchanger 102 is a condenser and enthalpy is required to be increased, a high-temperature high-pressure air pressure refrigerant discharged by the compressor 100 enters the first heat exchanger 102, is condensed in the first heat exchanger 102 to form a liquid refrigerant, and is throttled and reduced in pressure by an expansion valve to be divided into two paths.

One of the two paths of refrigerant enters the third heat exchanger 114 to be evaporated, and the other path of refrigerant returns to the enthalpy injection port 1002 of the compressor 100 through the first refrigerant pipeline 104. The first refrigerant pipeline 104 enters the second heat exchanger 106 after being throttled and cooled by the throttling component 108, exchanges heat with another refrigerant in the second heat exchanger 106, absorbs heat in the another refrigerant, becomes a superheated refrigerant, and enters the enthalpy injection port 1002 of the compressor 100.

In the process, a first temperature is collected through the first temperature detecting element 110, where the first temperature is specifically a temperature between the second heat exchanger 106 and the throttling assembly 108, that is, a temperature of the refrigerant before the first refrigerant pipeline 104 exchanges heat through the second heat exchanger 106.

Meanwhile, a second temperature is collected through the second temperature detecting element 112, where the second temperature is specifically a temperature between the second heat exchanger 106 and the enthalpy spraying port 1002, that is, a temperature of the refrigerant after the first refrigerant pipeline 104 exchanges heat through the second heat exchanger 106.

According to first temperature and second temperature, can confirm the heat transfer effect of the refrigerant in first refrigerant pipeline 104 around through second heat exchanger 106, therefore, through based on first temperature and second temperature, throttle subassembly 108 to setting up on first refrigerant pipeline 104 controls, thereby can guarantee the enhanced vapor injection effect effectively, special operating mode appears when the air conditioner, when the heat transfer effect that leads to second heat exchanger 106 reduces, can in time end the enhanced vapor injection return circuit, avoid the liquid refrigerant that leads to because of the unable abundant heat absorption of the refrigerant in first refrigerant pipeline 104 gets into injection enthalpy mouth 1002, thereby the effectual "liquid hammer" phenomenon of avoiding, improve the reliability of compressor 100 enhanced vapor injection, guarantee air conditioning equipment simultaneously and can all can steady operation under various operating modes, improve air conditioning equipment's use experience.

Example two

In some embodiments of the present application, the throttle assembly 108 includes: a solenoid valve 1082; the first expansion valve 1084 is provided between the solenoid valve 1082 and the second heat exchanger 106.

In this embodiment, the throttling assembly 108 specifically includes a solenoid valve 1082 and a first expansion valve 1084, wherein the first expansion valve 1084 is configured to further throttle and cool the refrigerant in the first refrigerant pipeline 104, so that the temperature of the refrigerant in the first refrigerant pipeline 104 is lower than the temperature of the refrigerant between the first heat exchanger 102 and the third heat exchanger 114, and after heat exchange is performed by the second heat exchanger 106, the refrigerant in the first refrigerant pipeline 104 is formed into a superheated gaseous refrigerant.

Meanwhile, the solenoid valve 1082 is disposed on the first refrigerant pipe 104, and when the first expansion valve 1084 is opened to a certain degree, the solenoid valve 1082 is synchronously opened. When the enhanced vapor injection is not needed, or the refrigerant in the first refrigerant pipeline 104 is detected to be in a liquid state after passing through the second heat exchanger 106, the solenoid valve 1082 and the first expansion valve 1084 are closed synchronously, so as to prevent the liquid refrigerant remaining in the first refrigerant pipe 104 after the first expansion valve 1084 from entering the enthalpy spraying port 1002 of the compressor 100, thereby more effectively preventing the liquid impact phenomenon, on the other hand, providing additional safety when the electronic expansion valve has a fault, preventing the electronic expansion valve from being closed normally, or when faults of reversal, blocking, no response and the like occur, the situation that the enhanced vapor injection system cannot be closed in time occurs, thereby further improve the reliability of compressor 100 jet enthalpy gain, guarantee simultaneously that air conditioning equipment can homoenergetic steady operation under various operating modes, improve air conditioning equipment's use and experience.

EXAMPLE III

In some embodiments of the present application, the throttle assembly 108 further comprises: and a capillary tube 1086 provided between the solenoid valve 1082 and the first expansion valve 1084.

In the present embodiment, the throttle assembly 108 further includes a capillary tube 1086, and the capillary tube 1086 is disposed between the solenoid valve 1082 and the first expansion valve 1084. Specifically, the high-temperature refrigerant discharged from the compressor 100 enters the first refrigerant pipeline 104 after being condensed by the first heat exchanger 102, the temperature of the refrigerant in the first refrigerant pipeline 104 is reduced after being throttled by the first expansion valve 1084, and meanwhile, after the refrigerant is throttled and cooled by the first expansion valve 1084, the refrigerant is further throttled and cooled under the throttling effect of the capillary tube 1086, so that the throttling effect can be ensured, the temperature of the refrigerant in the first refrigerant pipeline 104 is further reduced, and the cooling effect of the refrigerant in the refrigerant pipeline between the first heat exchanger 102 and the third heat exchanger 114 is satisfied.

Meanwhile, double protection can be formed between the capillary tube 1086 and the solenoid valve 1082, that is, the risk that the liquid refrigerant directly enters the enthalpy injection port 1002 of the compressor 100 can be further reduced, so that even if the first expansion valve 1084 fails, and the first expansion valve 1084 cannot normally throttle or close, the capillary tube 1086 can also play a sufficient throttling role, and in cooperation with the solenoid valve 1082, "throttling" is realized through the capillary tube 1086, and "conduction or stop" of the enhanced vapor injection system is realized through the solenoid valve 1082, so that the normal operation of the enhanced vapor injection system can be still ensured under the condition that the first expansion valve 1084 cannot normally operate, the reliability of the enhanced vapor injection system of the compressor 100 is further improved, the operation stability of the air conditioning equipment is improved, and the user experience is ensured.

Example four

In some embodiments of the present application, the compressor 100 further includes a discharge port and a return port, and the air conditioning apparatus further includes: a third heat exchanger 114; and the second refrigerant pipeline 116 is sequentially communicated with the exhaust port, the first heat exchanger 102, the third heat exchanger 114 and the return air port, and the second refrigerant pipeline 116 exchanges heat with the first refrigerant pipeline 104 through the second heat exchanger 106.

In the embodiment of the present application, the compressor 100 includes a discharge port and also includes a return port. The air conditioner includes a third heat exchanger 114 and a second refrigerant line 116. The discharge port of the compressor 100 is connected to the first heat exchanger 102 through a second refrigerant pipeline 116, the outlet of the first heat exchanger 102 is connected to the inlet of the third heat exchanger 114 through the second refrigerant pipeline 116, and the outlet of the third heat exchanger 114 is connected to the return air port of the compressor 100 through the second refrigerant pipeline 116, that is, the compressor 100, the first heat exchanger 102, and the third heat exchanger 114 are sequentially communicated through the second refrigerant pipeline 116. When the first heat exchanger 102 is a condenser and the third heat exchanger 114 is an evaporator, the second expansion valve 118 is fully opened or has a certain opening degree, so that the refrigerant is compressed by the compressor 100 to form a high-temperature and high-pressure gaseous refrigerant, the gaseous refrigerant enters the first heat exchanger 102 and is condensed into a liquid state, and then is subjected to heat exchange by the second heat exchanger 106 to obtain a low-temperature refrigerant, the low-temperature refrigerant enters the third heat exchanger 114 to evaporate and absorb heat, and an overheated refrigerant formed after absorbing heat returns to the compressor 100 to form refrigerant circulation, thereby realizing the refrigeration function of the air conditioning equipment and ensuring the use experience of the air conditioning equipment during refrigeration.

EXAMPLE five

In some embodiments of the present application, the air conditioning apparatus further comprises: a second expansion valve 118 disposed on the second refrigerant pipe 116 and located between the first heat exchanger 102 and the second heat exchanger 106;

and a third expansion valve 120 disposed on the second refrigerant pipe 116 and located between the second heat exchanger 106 and the third heat exchanger 114.

In the embodiment of the present application, the air conditioning apparatus further includes a second expansion valve 118, and the second expansion valve 118 is disposed on the second refrigerant pipeline 116 between the first heat exchanger 102 and the throttling assembly 108. Specifically, when the first heat exchanger 102 is a condenser and the third heat exchanger 114 is an evaporator, the discharge port of the compressor 100 discharges high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant enters the first heat exchanger 102 through the second refrigerant pipeline 116 and is condensed into liquid refrigerant in the first heat exchanger 102. The liquid refrigerant is further discharged from the first heat exchanger 102 through the second refrigerant pipe 116, and the liquid refrigerant discharged from the first heat exchanger 102 is throttled by the second expansion valve 118 to form a throttled low-temperature refrigerant.

A part of the low-temperature refrigerants enters the first refrigerant pipeline 104 and is further throttled by the throttling assembly 108, so that a refrigerant with a lower temperature is obtained. The other part of the low-temperature refrigerant directly enters the second heat exchanger 106, and exchanges heat with the refrigerant with lower temperature in the first refrigerant pipeline 104 through the second heat exchanger 106, so that the refrigerant in the first refrigerant pipeline 104 absorbs heat to form an overheated refrigerant and returns to the enthalpy injection port 1002 of the compressor 100, and meanwhile, the refrigerant in the second refrigerant pipeline 116 is further lowered to enter the third heat exchanger 114 to evaporate and absorb heat, so that refrigeration is realized, and the use experience of the air conditioning equipment during refrigeration is guaranteed.

When the first heat exchanger 102 is an evaporator and the third heat exchanger 114 is a condenser, the third expansion valve 120 is fully opened or has a certain opening degree, the refrigerant is compressed by the compressor 100 to form a high-temperature and high-pressure gaseous refrigerant, the gaseous refrigerant is condensed into a liquid refrigerant in the first heat exchanger 102, the liquid refrigerant enters the second heat exchanger 106 after passing through the second expansion valve 118, and then the liquid refrigerant is divided into two paths, and the first path enters the third heat exchanger 114 through the second expansion valve 118; the second path passes through the first refrigerant pipeline 104, is further throttled and cooled by throttling of the throttling component 108, exchanges heat with the refrigerant in the second refrigerant pipeline 116 in the second heat exchanger 106 to form gaseous superheated refrigerant, enters the enthalpy spraying port 1002 of the compressor 100, and the refrigerant in the second refrigerant pipeline 116 enters the first heat exchanger 102 after being throttled, depressurized and cooled by the third expansion valve 120, is evaporated and absorbs heat, and then is changed into gaseous refrigerant to return to the air return port of the compressor 100 to form refrigerant circulation, so that the heating function of the air conditioning equipment is realized, and the use experience of the air conditioning equipment during heating is ensured.

EXAMPLE six

In some embodiments of the present application, the second heat exchanger 106 is a plate-type second heat exchanger 106.

In this application embodiment, the second heat exchanger 106 is a plate-type second heat exchanger 106, the plate-type second heat exchanger 106 is compact in structure, the occupied space is small, and meanwhile, the heat exchange efficiency between the first refrigerant pipeline 104 and the second refrigerant pipeline 116 can be efficiently realized, so that in the first refrigerant pipeline 104, the refrigerant subjected to further throttling and cooling by the throttling assembly 108 can fully absorb the heat of the refrigerant in the second refrigerant pipeline 116, and thus the refrigerant in the first refrigerant pipeline 104 is formed into an overheated refrigerant and then returns to a spray welding port of the compressor 100, thereby effectively preventing a "liquid impact" phenomenon, ensuring the reliability of the air injection enthalpy increase of the compressor 100, ensuring the stable operation of the air conditioning equipment, and improving the use experience of a user.

EXAMPLE seven

In some embodiments of the present application, there is provided an air conditioning control method for controlling an air conditioner as provided in the first aspect, fig. 2 shows one of flowcharts of the air conditioning control method according to an embodiment of the present application, and as shown in fig. 2, the air conditioning control method includes:

step 202, collecting a first temperature and a second temperature, wherein the first temperature is the temperature between the second heat exchanger and the throttling assembly, and the second temperature is the temperature between the second heat exchanger and the enthalpy injection port;

and step 204, controlling the throttle assembly to work according to the first temperature and the second temperature.

In an embodiment of the present application, an air conditioning apparatus includes a compressor, a first heat exchanger, a first refrigerant pipeline, and a second heat exchanger. The air conditioning equipment is provided with an enhanced vapor injection system, the first refrigerant pipeline is communicated with the first heat exchanger and an enthalpy injection port of the compressor, when the enthalpy is required to be increased, a high-temperature high-pressure air pressure refrigerant discharged by the compressor enters the first heat exchanger, is condensed in the first heat exchanger to form a liquid refrigerant, and is throttled and depressurized by the expansion valve to be divided into two paths.

Example eight

In some embodiments of the present application, the throttling assembly includes a solenoid valve and a first expansion valve, and based on a first temperature and a second temperature, fig. 3 shows a second flowchart of an air conditioner control method according to an embodiment of the present application, and as shown in fig. 3, the operation of the throttling assembly is controlled, including:

step 302, controlling the electromagnetic valve and the first expansion valve, wherein the opening degree of the first expansion valve is a preset opening degree;

step 304, calculating a difference value between the first temperature and the second temperature;

step 306, when the difference value is smaller than a preset first threshold value, controlling the opening degree of the first expansion valve to reduce by a first opening degree;

and 308, controlling the opening degree of the first expansion valve to increase by a second opening degree when the difference value is larger than a preset second threshold value.

The second threshold value is larger than the first threshold value, and the first opening degree is larger than the second opening degree.

In an embodiment of the application, the throttling assembly specifically includes a solenoid valve and a first expansion valve, where the first expansion valve is used to further throttle and cool the refrigerant in the first refrigerant pipeline, so that the temperature of the refrigerant in the first refrigerant pipeline is lower than the temperature of the refrigerant between the first heat exchanger and the third heat exchanger, and after heat exchange is performed by the second heat exchanger, the refrigerant in the first refrigerant pipeline is formed into a superheated gaseous refrigerant. Meanwhile, the electromagnetic valve is arranged on the first refrigerant pipeline and used for controlling the on-off of the first refrigerant pipeline, namely the on-off of the enhanced vapor injection pipeline.

Example nine

In some embodiments of the present application, the air conditioning control method further includes: when the opening degree of the first expansion valve is smaller than or equal to the first opening degree threshold value and the difference value meets the preset condition, closing the first expansion valve and the electromagnetic valve and adding 1 to the count value; wherein the preset conditions specifically include: the difference is less than or equal to the duration of the first difference, which reaches a first preset duration, or the difference is less than or equal to the duration of the second difference, which reaches a second preset duration. The first difference is smaller than the second difference, and the first preset time length is smaller than the second preset time length.

If the opening degree of the first expansion valve reaches the minimum opening degree and meets the preset conditions, the situation that the enhanced vapor injection pipeline is continuously opened at the moment is judged, the operation stability of the compressor is affected, and therefore the first expansion valve and the electromagnetic valve are closed, namely the enhanced vapor injection pipeline (the first pipeline) is closed, and therefore liquid refrigerant is prevented from returning to the compressor through the first pipeline to cause liquid impact faults.

Example ten

In some embodiments of the present application, after closing the first expansion valve and the solenoid valve, the method further comprises:

starting a timer under the condition that the count value is equal to N, wherein N is more than or equal to 0 and less than 4; when the timing duration of the timer reaches a third preset duration and an enthalpy-increasing control signal is received, controlling the electromagnetic valve to be opened and controlling the first expansion valve to be opened to a target opening degree; the target opening is the difference between a preset opening and an adjustment value, and the adjustment value is 8 multiplied by N.

In the embodiment of the present application, N is a count value, specifically, the number of times of forcibly closing the first expansion valve and the solenoid valve. If N is less than 4, after the electromagnetic valve and the first expansion valve are closed, a timer is started, and the closing time length of the electromagnetic valve and the first expansion valve, namely the enhanced vapor injection pipeline, is recorded.

The target opening degree is specifically a difference obtained by subtracting an adjustment value from a preset opening degree, that is, after the enhanced vapor injection pipeline is forcibly closed, if the enhanced vapor injection pipeline needs to be opened again, the initial opening degree of the first expansion valve needs to be reduced, so that the enhanced vapor injection pipeline is opened with a higher throttling effect, the temperature of the refrigerant in the enhanced vapor injection pipeline, that is, the temperature of the refrigerant in the first refrigerant pipeline is further reduced, and therefore, when the enhanced vapor injection pipeline exchanges heat with the refrigerant in the second refrigerant pipeline, more heat can be absorbed from the refrigerant in the second refrigerant pipeline, an overheated refrigerant is obtained, the refrigerant in the first refrigerant pipeline is prevented from absorbing heat insufficiently, so that residual liquid refrigerant returns to an enthalpy injection port of the compressor, and a liquid impact phenomenon is prevented.

EXAMPLE eleven

In some embodiments of the present application, in the case where the count value is greater than or equal to 4, corresponding failure information is generated.

In the embodiment of the present application, if the count value is greater than or equal to 4, it indicates that a situation that the enhanced vapor injection pipeline (the first refrigerant pipeline) needs to be closed, that is, the first expansion valve and the electromagnetic valve are closed occurs many times within a period of time, and the enhanced vapor injection system is likely to have a fault, such as failure of the electronic expansion valve, inversion of the electronic expansion valve, and the like, and at this time, corresponding fault information is generated to prompt a user or a technician that the enhanced vapor injection system is faulty and needs to be maintained.

In other embodiments, the first expansion valve and the electromagnetic valve may fail at the same time, so that the first refrigerant pipeline cannot be cut off, and at this time, the air conditioning equipment can be controlled to stop, the compressor is prevented from being damaged due to liquid impact, and the reliability of the air conditioning equipment is further improved.

Example twelve

In some embodiments of the present application, as shown in fig. 1, the solenoid valve is embodied as an EVI solenoid valve, and the EVI solenoid valve is opened and closed with a first electronic expansion valve (EVI electronic expansion valve).

When the third heat exchanger is a condenser and the first heat exchanger is an evaporator, the second electronic expansion valve is fully opened or half opened to a certain opening degree, at the moment, the compressor discharges high-temperature and high-pressure gaseous refrigerant, the gaseous refrigerant is condensed into liquid refrigerant in the third heat exchanger, and the liquid refrigerant enters the second heat exchanger after passing through the third electronic expansion valve, wherein the third electronic expansion valve can throttle the refrigerant or not.

After passing through the second heat exchanger, the refrigerant is divided into two paths, and the first path enters the first heat exchanger through a second electronic expansion valve; the second path enters a second heat exchanger after passing through an EVI electromagnetic valve, a capillary tube and an EVI electronic expansion valve, the liquid refrigerant is further throttled and cooled at the moment, exchanges heat with the refrigerant in a second refrigerant pipeline in the second heat exchanger, absorbs the heat of the refrigerant in the second refrigerant pipeline, and enters an enthalpy spraying port of the compressor after being changed into an overheated gaseous refrigerant. The supercooled liquid refrigerant in the second refrigerant pipeline is throttled, depressurized and cooled by the second electronic expansion valve, enters the first heat exchanger to be evaporated and absorb heat, is changed into a gaseous refrigerant and returns to the air return port of the compressor, and the circulation is completed.

When the first heat exchanger is a condenser and the third heat exchanger is an evaporator, the first electronic expansion valve is fully opened or half opened to a certain opening degree, the compressor discharges high-temperature and high-pressure gaseous refrigerant, the gaseous refrigerant is condensed in the first heat exchanger to form liquid refrigerant, the liquid refrigerant is divided into two paths after passing through the second electronic expansion valve, one path of the liquid refrigerant enters the heat exchanger through the first refrigerant pipeline, and the other path of the liquid refrigerant directly enters the second heat exchanger through the second refrigerant pipeline. The second electronic expansion valve may or may not throttle the refrigerant.

The refrigerant in the first refrigerant pipeline sequentially passes through the EVI electromagnetic valve, the capillary tube and the EVI electronic expansion valve and then enters the second heat exchanger, at the moment, the liquid refrigerant is further throttled and cooled, and in the second heat exchanger, the heat from the refrigerant in the second refrigerant pipeline is absorbed to form an overheated gaseous refrigerant and the overheated gaseous refrigerant enters the enthalpy spraying port of the compressor. After being further throttled and cooled by a third electronic expansion valve, the supercooled liquid refrigerant in the second refrigerant pipeline enters a third heat exchanger to be evaporated and absorb heat, and is changed into a gas refrigerant to return to a gas return port of the compressor, so that refrigerant circulation is completed.

When the EVI electronic expansion valve opening condition is satisfied, the EVI solenoid valve is opened and the EVI electronic expansion valve is opened to an initial opening degree, TA (first temperature) and TB (second temperature) are detected, and the EVI electronic expansion valve opening degree is recorded.

If TA-TB is less than Z1, the opening of the EVI electronic expansion valve is closed, and K1 is opened;

if TA-TB is more than or equal to Z1 and TA-TB is more than or equal to Z2, the opening of the EVI electronic expansion valve is kept unchanged;

if TA-TB is more than Z2, opening the opening of the EVI electronic expansion valve K2;

among them, K2 < K1, since opening is large and the reliability of superheat degree reduction is low, the number of steps for closing is required to be larger than that for opening, and backlash can be formed to prevent back-and-forth fluctuation adjustment.

And if the opening of the EVI electronic expansion valve does not reach the preset minimum opening KX, or the duration of TA-TB ≤ 1 is less than T1 and the duration of TA-TB ≤ 2 is less than T2 after the opening of the EVI electronic expansion valve reaches the preset minimum opening, the opening of the EVI electronic expansion valve is still adjusted according to the superheat degree.

And if the opening degree of the EVI electronic expansion valve reaches the preset minimum opening degree KX and the TA-TB is less than or equal to 1 for the duration T1 or the TA-TB is less than or equal to 2 for the duration T2, closing the EVI electromagnetic valve and the EVI electronic expansion valve, and adding 1 to the cumulative number N.

And if the accumulated times N is more than or equal to 4, closing the EVI electromagnetic valve and the EVI electronic expansion valve, and reporting an EVI fault prompt. And if the accumulated times N is less than 4, accumulating the operation time T3, meeting the EVI valve opening condition, opening the EVI electromagnetic valve, opening the EVI electronic expansion valve to the initial opening degree minus Nx 8, detecting the temperature of TA and TB, recording the opening degree of the EVI electronic expansion valve, and continuing to operate.

Fig. 4 shows a third flowchart of an air conditioner control method according to an embodiment of the present application, and as shown in fig. 4, the method includes:

step 402, opening an EVI electromagnetic valve, and opening an EVI electronic expansion valve to an initial opening degree;

step 404, detecting TA and TB, and recording the opening of the EVI electronic expansion valve;

step 406, if TA-TB is less than Z1, opening degree of the EVI electronic expansion valve is closed, and K1 is set; if TA-TB is more than or equal to Z1 and TA-TB is more than or equal to Z2, the opening of the EVI electronic expansion valve is kept unchanged; if TA-TB > Z2, opening the opening of the EVI electronic expansion valve by K2;

step 408, judging whether the opening of the EVI electronic expansion valve reaches a preset minimum opening KX; if yes, go to step 410, otherwise return to step 406;

step 410, judging whether the duration of A-TB ≤ 1 reaches T1 or the duration of TA-TB ≤ 2 reaches T2; if yes, go to step 412, otherwise, feedback step 406;

step 412, closing the EVI electromagnetic valve and the EVI electronic expansion valve, and adding 1 to the counting N;

step 414, judging whether N is more than or equal to 4; if yes, go to step 416; otherwise, go to step 418;

step 416, closing the EVI electromagnetic valve and the EVI electronic expansion valve, and reporting an EVI fault;

step 418, after the accumulated running time meets T3, when the EVI valve opening condition is met again, controlling the EVI electromagnetic valve to be opened, and opening the EVI electronic expansion valve to the opening degree of which the initial opening degree is subtracted by the opening degree of Nx 8; after step 418, return to step 404.

EXAMPLE thirteen

In some embodiments of the present application, an air conditioning control device is provided for controlling an air conditioning apparatus according to the first aspect, fig. 5 shows a block diagram of the air conditioning control device according to an embodiment of the present application, and as shown in fig. 5, the air conditioning control device 500 includes:

the collecting module 502 is configured to collect a first temperature and a second temperature, where the first temperature is a temperature between the second heat exchanger and the throttling assembly, and the second temperature is a temperature between the second heat exchanger and the enthalpy injection port;

and a control module 504 for controlling the operation of the throttling assembly according to the first temperature and the second temperature.

In the process, a first temperature and a second temperature are collected, wherein the first temperature is specifically the temperature between the second heat exchanger and the throttling assembly, namely the temperature of the refrigerant before the first refrigerant pipeline exchanges heat through the second heat exchanger, and the second temperature is specifically the temperature between the second heat exchanger and the enthalpy injection port, namely the temperature of the refrigerant after the first refrigerant pipeline exchanges heat through the second heat exchanger.

In some embodiments of the present application, the throttle assembly includes a solenoid valve and a first expansion valve, and the control module 504 is further configured to:

controlling an electromagnetic valve and a first expansion valve, wherein the opening degree of the first expansion valve is a preset opening degree;

calculating a difference between the first temperature and the second temperature; when the difference value is smaller than a preset first threshold value, controlling the opening degree of the first expansion valve to reduce by a first opening degree; and when the difference value is larger than a preset second threshold value, controlling the opening degree of the first expansion valve to increase by a second opening degree. The second threshold value is larger than the first threshold value, and the first opening degree is larger than the second opening degree.

In some embodiments of the present application, the control module 504 is further configured to: when the opening degree of the first expansion valve is smaller than or equal to the first opening degree threshold value and the difference value meets the preset condition, closing the first expansion valve and the electromagnetic valve and adding 1 to the count value; wherein the preset conditions specifically include: the difference is less than or equal to the duration of the first difference, which reaches a first preset duration, or the difference is less than or equal to the duration of the second difference, which reaches a second preset duration. The first difference is smaller than the second difference, and the first preset time length is smaller than the second preset time length.

In some embodiments of the present application, the control module 504 is further configured to: starting a timer under the condition that the count value is equal to N, wherein N is more than or equal to 0 and less than 4; when the timing duration of the timer reaches a third preset duration and an enthalpy-increasing control signal is received, controlling the electromagnetic valve to be opened and controlling the first expansion valve to be opened to a target opening degree; the target opening is the difference between a preset opening and an adjustment value, and the adjustment value is 8 multiplied by N.

In some embodiments of the present application, the control module 504 is further configured to generate corresponding fault information if the count value is greater than or equal to 4.

Example fourteen

In some embodiments of the present application, an air conditioner is provided, where the air conditioner includes an air conditioning control device provided in any one of the above embodiments, and therefore, the air conditioner also includes all the beneficial effects of the air conditioning control device provided in any one of the above embodiments, and details are not repeated herein to avoid repetition.

Example fifteen

In some embodiments of the present application, there is provided an air conditioner including: a memory having a program or instructions stored thereon; the processor is configured to implement the steps of the control method for the air conditioning equipment provided in any one of the above embodiments when executing the program or the instruction, and therefore, the air conditioner also includes all the beneficial effects of the control method for the air conditioning equipment provided in any one of the above embodiments, and in order to avoid repetition, details are not repeated here.

Example sixteen

In some embodiments of the present application, a readable storage medium is provided, where a program or an instruction is stored, and the program or the instruction when executed by a processor implements the steps of the control method for an air conditioning device according to any of the above embodiments, so that the readable storage medium also includes all the beneficial effects of the control method for an air conditioning device according to any of the above embodiments, and details are not described herein again to avoid repetition.

In the description of the present application, the terms "plurality" or "plurality" refer to two or more than two, and unless otherwise expressly defined, the terms "upper", "lower", and the like refer to orientations or positional relationships illustrated in the accompanying drawings, which are meant only to facilitate description of the present application and to simplify description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this application, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air conditioning apparatus, characterized by comprising:

a compressor including an enthalpy injection port;

a first heat exchanger;

the first refrigerant pipeline is communicated with the first heat exchanger and the enthalpy spraying port;

the second heat exchanger is arranged on the first refrigerant pipeline;

the throttling assembly is arranged on the first refrigerant pipeline and positioned between the second heat exchanger and the first heat exchanger;

the first temperature detecting piece is used for collecting a first temperature between the second heat exchanger and the throttling assembly;

the second temperature detecting piece is used for collecting a second temperature between the second heat exchanger and the enthalpy spraying port;

the controller is used for controlling the throttling assembly to work according to the first temperature and the second temperature;

the throttle assembly includes: an electromagnetic valve;

the first expansion valve is arranged between the electromagnetic valve and the second heat exchanger;

the compressor further includes an exhaust port and a return air port, and the air conditioning apparatus further includes:

a third heat exchanger;

the second refrigerant pipeline is communicated with the exhaust port, the first heat exchanger, the third heat exchanger and the return air port in sequence, and exchanges heat with the first refrigerant pipeline through the second heat exchanger;

collecting a first temperature between the second heat exchanger and the throttling assembly and a second temperature between the second heat exchanger and the enthalpy injection port;

controlling the throttling component to work according to the first temperature and the second temperature;

controlling the operation of the throttling assembly according to the first temperature and the second temperature, comprising:

controlling the electromagnetic valve to be opened, and controlling the first expansion valve to be opened by a preset opening degree;

determining a difference between the first temperature and the second temperature;

controlling the opening degree of the first expansion valve to decrease by a first opening degree in a case where the difference is smaller than a first threshold value;

controlling the opening degree of the first expansion valve to increase by a second opening degree in the case where the difference is greater than a second threshold value;

wherein the second threshold is greater than the first threshold, and the first opening degree is greater than the second opening degree;

under the condition that the opening degree of the first expansion valve is smaller than or equal to a first opening degree threshold value and the difference value meets a preset condition, closing the first expansion valve and the electromagnetic valve, and adding 1 to a count value;

wherein the preset conditions are as follows: the duration of the difference value is less than or equal to a first difference value and reaches a first preset duration, or the duration of the difference value is less than or equal to a second difference value and reaches a second preset duration, the first difference value is less than the second difference value, and the first preset duration is less than the second preset duration.

2. The air conditioning apparatus of claim 1, wherein the throttling assembly further comprises:

and the capillary tube is arranged between the electromagnetic valve and the first expansion valve.

3. The air conditioning apparatus as claimed in claim 1 or 2, further comprising:

the second expansion valve is arranged on the second refrigerant pipeline and is positioned between the first heat exchanger and the second heat exchanger;

4. Air conditioning apparatus according to claim 1 or 2, characterised in that the second heat exchanger is a plate-type second heat exchanger.

5. An air conditioning control method for controlling the air conditioning apparatus according to any one of claims 1 to 4, characterized by comprising:

6. The air conditioning control method according to claim 5, characterized in that after said closing of the first expansion valve and the solenoid valve, the method further comprises:

starting timing under the condition that the count value is N, wherein N is a positive integer less than 4;

when the timing duration reaches a third preset duration and an enthalpy increasing control signal is received, controlling the electromagnetic valve to be opened, and controlling the first expansion valve to be opened to a target opening degree;

the target opening degree is the difference between the preset opening degree and an adjustment value, and the adjustment value is 8 multiplied by N.

7. The air conditioning control method according to claim 5, wherein the range of the first difference value is greater than 0 and 1 or less;

the second difference is in a range of greater than 1 and equal to or less than 2.

8. The air conditioner control method according to claim 6, further comprising:

and generating corresponding fault information when the count value is greater than or equal to 4.

9. An air conditioning control apparatus for controlling the air conditioning device according to claim 1 or 2, characterized by comprising:

the acquisition module is used for acquiring a first temperature between the second heat exchanger and the throttling assembly and a second temperature between the second heat exchanger and the enthalpy injection port;

the control module is used for controlling the throttling assembly to work according to the first temperature and the second temperature;

according to the first temperature and the second temperature, the control module is further configured to:

controlling the electromagnetic valve and the first expansion valve, wherein the opening degree of the first expansion valve is a preset opening degree;

calculating a difference between the first temperature and the second temperature;

when the difference value is smaller than a preset first threshold value, controlling the opening degree of the first expansion valve to reduce by a first opening degree;

when the difference value is larger than a preset second threshold value, controlling the opening degree of the first expansion valve to increase by a second opening degree;

the second threshold value is larger than the first threshold value, and the first opening degree is larger than the second opening degree;

the control module is further used for closing the first expansion valve and the electromagnetic valve and adding 1 to a count value when the opening degree of the first expansion valve is smaller than or equal to a first opening degree threshold value and the difference value meets a preset condition;

10. An air conditioner, comprising: the air conditioning control apparatus according to claim 9.

11. An air conditioner, comprising:

a memory having a program or instructions stored thereon;

a processor configured to implement the steps of the method of any one of claims 5 to 8 when executing the program or instructions.

12. A readable storage medium on which a program or instructions are stored, characterized in that the program or instructions, when executed by a processor, implement the steps of the method according to any one of claims 5 to 8.