CN115479354A - Air conditioner control method and device, air conditioner and storage medium - Google Patents
Air conditioner control method and device, air conditioner and storage medium Download PDFInfo
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- CN115479354A CN115479354A CN202211274207.9A CN202211274207A CN115479354A CN 115479354 A CN115479354 A CN 115479354A CN 202211274207 A CN202211274207 A CN 202211274207A CN 115479354 A CN115479354 A CN 115479354A
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- 239000003507 refrigerant Substances 0.000 claims abstract description 175
- 239000011555 saturated liquid Substances 0.000 claims abstract description 61
- 238000010586 diagram Methods 0.000 claims description 29
- 238000004590 computer program Methods 0.000 claims description 18
- 230000006870 function Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 56
- 238000004781 supercooling Methods 0.000 abstract description 18
- 230000001276 controlling effect Effects 0.000 description 25
- 230000008859 change Effects 0.000 description 9
- 229920006395 saturated elastomer Polymers 0.000 description 6
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- 230000004044 response Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000013526 supercooled liquid Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005514 two-phase flow Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses an air conditioner control method and device, an air conditioner and a storage medium, and relates to the technical field of air conditioners. Wherein the method comprises the following steps: acquiring the current temperature and the current pressure of the refrigerant after the refrigerant is throttled; determining a saturated liquid temperature of the refrigerant from the current pressure of the refrigerant; and if the current temperature of the refrigerant is detected to be higher than the saturated liquid temperature, controlling an outdoor fan to increase the rotating speed and/or controlling a compressor to increase the running frequency. The invention controls the outdoor fan to increase the rotating speed and controls the compressor to increase the running frequency according to the current temperature of the refrigerant and the saturated liquid temperature of the refrigerant, thereby increasing the heat exchange quantity of the outdoor unit, further reducing the temperature of the refrigerant at the outdoor side, further increasing the supercooling degree of the refrigerant, enabling the refrigerant to fall in an supercooling zone after being throttled, namely ensuring that the refrigerant is still liquid after being throttled, avoiding the generation of liquid flow sound due to a gas-liquid two-phase state, and fundamentally eliminating the noise of the liquid flow sound.
Description
Technical Field
The embodiment of the invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device, an air conditioner and a storage medium.
Background
The air conditioner generates various noises such as the noise of an indoor fan, the noise of an outdoor fan, and the noise of a compressor during operation, and the generation of the noises reduces the user experience. Among various noises generated when the air conditioner is operated, there is also a noise generated when a refrigerant flows, and the air conditioner performs a cooling or heating process by circulating the refrigerant in a pipe. The refrigerant flows in the pipe is a quite complicated process, particularly when the refrigerant flows through the throttling component, the liquid pressure is reduced by friction in the flowing process of the refrigerant, and the supercooled liquid is converted into saturated liquid. As the pressure is further reduced, the liquid becomes superheated and the liquid refrigerant begins to bubble, which breaks down and produces a fluidic sound of frizzled sound. Due to the variation of pressure and the diffusion and flow process, the air conditioner generates a discontinuous flow of frizzle sound, which can cause customer complaints due to the severe impact on the quality of the air conditioner. In the prior art, the problem of liquid flow sound is usually solved by adjusting the opening degree of a throttling component, however, the way can cause sudden change of the flow rate of the refrigerant, has great influence on the temperature adjusted by an indoor unit, and influences the comfort level of a user.
Disclosure of Invention
The embodiment of the invention provides an air conditioner control method and device, an air conditioner and a storage medium, and aims to solve the problem that a refrigerant of the existing air conditioner generates liquid flow sound when passing through a throttling component.
In a first aspect, an embodiment of the present invention provides an air conditioner control method, where the method includes: acquiring the current temperature and the current pressure of the refrigerant after the refrigerant is throttled; determining a saturated liquid temperature of the refrigerant from the current pressure of the refrigerant; and if the current temperature of the refrigerant is detected to be higher than the saturated liquid temperature, controlling an outdoor fan to increase the rotating speed and/or controlling a compressor to increase the running frequency.
In a second aspect, an embodiment of the present invention further provides an air conditioner, including an indoor unit and an outdoor unit connected to the indoor unit through a pipe, where the outdoor unit includes a throttling device, a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor are disposed in a position of the pipe where refrigerant flows out of the throttling device, the temperature sensor is configured to obtain a current temperature after the refrigerant is throttled, and the pressure sensor is configured to obtain a current pressure after the refrigerant is throttled; wherein the air conditioner executes the control method.
In a third aspect, an embodiment of the present invention further provides an air conditioner control device, including: the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature and the current pressure of the refrigerant after the refrigerant flows through a throttling device; a determination unit for determining a saturated liquid temperature of the refrigerant according to the current pressure of the refrigerant; and the control unit is used for controlling the outdoor fan to increase the rotating speed and/or the compressor to increase the running frequency if the current temperature of the refrigerant is detected to be higher than the saturated liquid temperature.
In a fourth aspect, an embodiment of the present invention further provides an air conditioner, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the above method when executing the computer program.
In a fifth aspect, the present invention also provides a computer-readable storage medium, which stores a computer program, and the computer program can implement the above method when executed by a processor.
The embodiment of the invention provides an air conditioner control method and device, an air conditioner and a storage medium. Wherein the method comprises the following steps: acquiring the current temperature and the current pressure of the refrigerant after the refrigerant is throttled; determining a saturated liquid temperature of the refrigerant from the current pressure of the refrigerant; and if the current temperature of the refrigerant is detected to be higher than the saturated liquid temperature, controlling an outdoor fan to increase the rotating speed and/or controlling a compressor to increase the running frequency. According to the technical scheme of the embodiment of the invention, the outdoor fan is controlled to increase the rotating speed and the compressor is controlled to increase the running frequency according to the current temperature of the refrigerant and the saturated liquid temperature of the refrigerant, so that the heat exchange quantity of the outdoor unit is increased, the temperature of the refrigerant on the outdoor side is further reduced, the supercooling degree of the refrigerant is increased, the refrigerant falls into a supercooling zone after being throttled, namely the refrigerant is still in a liquid state after being throttled, the generation of liquid flow sound due to a gas-liquid two-phase state is avoided, the noise of the liquid flow sound is fundamentally eliminated, and the use comfort of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a control method of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a state diagram of saturation of the refrigerant;
FIG. 4 is a schematic sub-flowchart of a method for controlling an air conditioner according to an embodiment of the present invention;
FIG. 5 is a pressure-enthalpy diagram of the refrigerant;
fig. 6 is a sub-flowchart of a control method for an air conditioner according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present invention;
fig. 8 is a flowchart illustrating an air conditioner control method according to another embodiment of the present invention;
fig. 9 is a flowchart illustrating a control method of an air conditioner according to still another embodiment of the present invention;
FIG. 10 is a schematic diagram of a control logic of a control method of an air conditioner according to an embodiment of the present invention;
fig. 11 is a schematic block diagram of an air conditioner control device according to an embodiment of the present invention; and
fig. 12 is a schematic block diagram of an air conditioner according to an embodiment of the present invention;
reference numerals:
1. an evaporator; 2. an indoor fan; 3. a temperature sensor; 4. a pressure sensor; 5. a throttling device; 6. an outdoor fan; 7. a condenser; 8. a compressor; 9. and a four-way valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Referring to fig. 1, fig. 1 is a schematic diagram of an air conditioner according to an embodiment of the present invention. As shown in fig. 1, the air conditioner includes: the outdoor unit comprises a throttling device 5, a temperature sensor 3 and a pressure sensor 4, the throttling device 5, an outdoor fan 6, a condenser 7, a compressor 8 and a four-way valve 9, wherein the evaporator 1 and the indoor fan 2 are arranged on one side of the indoor unit, the temperature sensor 3, the pressure sensor 4, the throttling device 5, the outdoor fan 6, the condenser 7, the compressor 8 and the four-way valve 9 are arranged on one side of the outdoor unit, the indoor unit is connected with the indoor unit through a pipeline, the outdoor unit comprises the throttling device 5, the temperature sensor 3 and the pressure sensor 4 are arranged in the position, flowing out of a refrigerant, of the throttling device 5 in the pipeline, the temperature sensor 3 is used for obtaining the current temperature after the refrigerant is throttled, and the pressure sensor 4 is used for obtaining the current pressure after the refrigerant is throttled. By arranging the temperature sensor 3 and the pressure sensor 4 behind the throttling device 5, the air conditioner can detect the current pressure P and the current temperature T of the throttled refrigerant in real time. The air conditioner executes the following control method, and by the control method, the air conditioner can monitor the current pressure and the current temperature of the throttled refrigerant in real time, calculate the saturated liquid temperature corresponding to the current refrigerant pressure through the current pressure, and adjust the frequency of the compressor 8 and the rotating speeds of the internal fan and the external fan in a linkage manner to improve the supercooling degree of the refrigerant at one side of the outdoor unit, so that the refrigerant at the outdoor side still has a certain supercooling degree after passing through the throttling device 5, namely the refrigerant is ensured to be still in a liquid state after passing through the throttling device 5, and the liquid flow sound caused by a gas-liquid two-phase state is avoided.
Fig. 2 is a flowchart illustrating an air conditioner control method according to an embodiment of the present invention. As shown in fig. 2, the method includes the following steps S110-S130.
And S110, acquiring the current temperature and the current pressure of the refrigerant after the refrigerant is throttled.
In the present embodiment, the temperature sensor 3 and the pressure sensor 4 are disposed after the throttling device 5, and the temperature and the pressure of the refrigerant after flowing through the throttling device 5 are collected by the temperature sensor 3 and the pressure sensor 4. The temperature sensor 3 and the pressure sensor 4 of the present embodiment are collected in real time, so that the current temperature and the current pressure after the throttling of the refrigerant can be monitored in real time.
And S120, determining the saturated liquid temperature of the refrigerant according to the current pressure of the refrigerant.
In order to facilitate understanding of the change in the gas-liquid state of the refrigerant during the flow in the pipe, the theory of the saturated state of the refrigerant, which is a state in which the liquid and the gas are in dynamic equilibrium, will be explained first. The liquid and gas in a saturated state are referred to as saturated liquid and saturated gas, respectively. At the moment, the gas-liquid temperature is the same, the saturation temperature is constant, and the saturation pressure is also constant; conversely, the saturation temperature is constant when the saturation pressure is constant. The temperature increases, the rate of gasification increases, the space gas density also increases, and dynamic equilibrium is reestablished. A certain saturation temperature of the substance must correspond to a certain saturation pressure. Next, the states of the refrigerant at different temperatures and pressures will be explained with reference to fig. 3. The state of the refrigerant mainly comprises a two-phase flow area, a metastable state liquid area and a supercooled liquid area, wherein the two-phase flow area is that the refrigerant flows in a pipeline in a mixed state of liquid and gas; metastable state liquid, namely the refrigerant is in a critical state of a supercooled liquid state and a two-phase state, the refrigerant can be changed into the two-phase state after the pressure of the refrigerant slightly fluctuates, and the hidden trouble of generating liquid flow sound exists; the sub-cooled liquid region, i.e., the refrigerant temperature, is below the saturated liquid temperature. When the refrigerant is in a two-phase flow region, the refrigerant is in a gas-liquid mixed state, and the liquid flow sound of the frizzle sound is generated at the time; when the refrigerant is in the metastable liquid region, the refrigerant is in a critical state although it is in a liquid state, and the state of the refrigerant is unstable and is easily transformed into a gas to generate a fluidic sound of "fringing sound"; when the refrigerant is in the supercooled liquid region, the refrigerant is in a liquid state at the moment, and liquid flow sound generated due to a gas-liquid two-phase state can be avoided. Therefore, the invention of the embodiment is based on the idea of how to ensure that the refrigerant still has a certain supercooling degree after throttling under the condition of not influencing the comfort of indoor users, so that the refrigerant is in a supercooling liquid area, and the problem of liquid flow sound is fundamentally solved. Specifically, since the pressure and the temperature of the substance have a corresponding relationship in a saturated state, the present embodiment obtains the current pressure of the throttled refrigerant, and then obtains the saturated liquid temperature of the refrigerant corresponding to the current pressure according to the current pressure. The problem of the liquid flow sound can be solved by controlling the various components of the air conditioner to place the refrigerant in the supercooling zone based on the current saturated liquid temperature of the refrigerant.
In an embodiment, referring to fig. 4, the step S120 includes: S121-S122.
S121, acquiring a pressure-enthalpy diagram corresponding to the refrigerant;
and S122, determining the saturated liquid temperature corresponding to the current pressure of the refrigerant according to the pressure-enthalpy diagram.
In the present embodiment, the pressure-enthalpy diagram (lgp-h diagram) refers to a graph of pressure versus enthalpy, and the pressure-enthalpy diagram is plotted with absolute pressure as ordinate and enthalpy as abscissa. The pressure-enthalpy diagram is an important tool for analyzing a vapor compression refrigeration cycle, and is commonly used for refrigeration cycle design, calculation and analysis. Referring to fig. 5, a pressure-enthalpy diagram of a relevant refrigerant is preset in a main routine by a manufacturer before shipping of an air conditioner, and the main routine can know a saturated liquid temperature Tb corresponding to the pressure of the current refrigerant through the pressure-enthalpy diagram, that is, the corresponding saturated liquid temperature can be known by knowing the pressure of the refrigerant.
In other embodiments, the saturated liquid temperature of the refrigerant may be a saturated gas temperature critical value and a saturated liquid temperature critical value of the refrigerant at different pressures recorded through a preset pressure-enthalpy correspondence table determined by a refrigerant pressure-enthalpy diagram. The saturated liquid temperature corresponding to the current pressure of the refrigerant can be directly obtained by inquiring the pressure-enthalpy corresponding table.
In an embodiment, referring to fig. 6, the step S122 includes: S1221-S1222.
S1221, determining a temperature value corresponding to the current pressure of the refrigerant according to the pressure-enthalpy diagram;
s1222, calculating the saturated liquid temperature according to the temperature value and a preset allowance.
In this embodiment, according to the theory of the substance saturation state, when the substance is in a saturated liquid and the temperature is slightly raised, the refrigerant in the liquid is evaporated into gas, and then the liquid flow sound is generated. Therefore, in order to ensure that the refrigerant is not in a critical state, but can be completely in an over-cooling area, and ensure the stability of the liquid state, the present embodiment still has a certain margin on the basis of the original saturated liquid temperature, that is, the saturated liquid temperature is reduced a little bit. In short, the temperature of the saturated liquid is reduced by the remaining margin, so that the operating parameters of each component of the air conditioner are adjusted in advance, and the operating parameters are not adjusted until the temperature of the refrigerant reaches the temperature of the saturated liquid. Specifically, firstly, the temperature value Tb corresponding to the current pressure of the refrigerant is determined according to the enthalpy-pressure diagram, where Tb is the base value of the original saturation temperature, and the preset margin of this embodiment is 1 ℃, so that the final saturated liquid temperature is determined to be Tb-1 by performing calculation according to Tb and the preset margin, and thus, the throttled refrigerant is not in a critical state but in an overcooling area, and it is ensured that no liquid flow sound is generated. It will of course be appreciated that the predetermined margin need not be 1, but may be other values, for example a, a saturated liquid temperature Tb-a, a > 0.
And S130, if the current temperature of the refrigerant is detected to be higher than the saturated liquid temperature, controlling the outdoor fan 6 to increase the rotating speed and/or controlling the compressor 8 to increase the running frequency.
In this embodiment, after the saturated liquid temperature of the refrigerant is obtained, whether the current temperature of the refrigerant is greater than the saturated liquid temperature is determined, and if the current temperature of the refrigerant is greater than the saturated liquid temperature, it is likely that the refrigerant is in a two-phase region at the time, where the refrigerant is in a gas-liquid mixed state, a sound of a liquid flow of "frizzle frizzy sound" can be generated, and operating parameters of components of the air conditioner need to be adjusted to make the refrigerant have a certain degree of supercooling; if the current temperature of the refrigerant is lower than the saturated liquid temperature, the refrigerant is in an supercooling zone at the moment, the refrigerant is in a liquid state, liquid flow sound cannot be generated, and the operation parameters of all parts of the air conditioner do not need to be adjusted.
In the prior art, the problem of liquid flow sound is usually solved by adjusting the opening degree of a throttling part, however, the method can cause sudden change of the flow rate of the refrigerant, greatly affect the temperature adjusted by an indoor unit and affect the comfort level of a user. In order to avoid the sudden change of the indoor temperature caused by the sudden change of the refrigerant flow, the embodiment reduces the temperature of the refrigerant on the outdoor side by adjusting the operating parameters of the outdoor fan 6 and the compressor 8, replaces the method of adjusting the opening of the throttling component, does not change the flow of the refrigerant, and solves the problem of the liquid flow sound by adopting a new control method. Specifically, in the present embodiment, the rotation speed of the outdoor fan 6 is increased and/or the operation frequency of the compressor 8 is increased by controlling the outdoor fan 6, wherein the rotation speed of the outdoor fan 6 may be increased by controlling the compressor 8 alone, or the operation frequency of the outdoor fan 6 may be increased by controlling the compressor 8 alone, or the rotation speed of the outdoor fan 6 and the operation frequency of the compressor 8 may be increased by controlling simultaneously.
Illustratively, with reference to fig. 5, when the current temperature of the refrigerant is greater than the saturated liquid temperature, i.e., T > Tb-1, it indicates that the refrigerant is at point 4 after being throttled by the throttling device 5, i.e., a two-phase region, and the refrigerant state is a gas-liquid two-phase state, at this time, the rotation speed of the outdoor fan 6 is increased at a rate of 50RPM/min, and the frequency of the compressor 8 is increased at 2Hz/min, so as to increase the heat exchange capacity of the outdoor unit, reduce the temperature of the refrigerant at the outdoor side, thereby increasing the degree of supercooling of the refrigerant, so that the refrigerant is throttled and falls at point 4', i.e., an overcooling region, thereby preventing the generation of liquid flow noise.
In an embodiment, referring to fig. 7, the air conditioner control method further includes the steps of: S141-S142.
S141, judging whether the current temperature of the refrigerant is lower than the saturated liquid temperature;
and S142, if the current temperature of the refrigerant is lower than the saturated liquid temperature, controlling the outdoor fan 6 to stop increasing the rotating speed and/or controlling the compressor 8 to stop increasing the running frequency.
In this embodiment, after the outdoor fan 6 is controlled to increase the rotation speed and the compressor 8 is controlled to increase the operation frequency, whether the current temperature of the refrigerant is lower than the saturated liquid temperature is continuously judged, if the current temperature of the refrigerant is lower than the saturated liquid temperature, it is indicated that the refrigerant is already in an over-cooling area at this time, no liquid flow sound is generated, the rotation speed of the outdoor fan 6 is not required to be continuously increased and the operation frequency of the compressor 8 is not required to be increased, then the outdoor fan 6 is controlled to stop increasing the rotation speed and the compressor 8 is controlled to stop increasing the operation frequency, that is, when T is less than or equal to Tb-1, the frequency of the compressor 8 and the rotation speed of the outdoor fan are regulated to stop acting, so that the increase of the overall heat exchange capacity of the air conditioner due to the increase of the frequency of the compressor 8 on the outdoor side and the increase of the rotation speed of the outdoor fan 6 is avoided, and the reduction of the comfort experience of the user due to the change of the indoor temperature is avoided. That is, in order to avoid the generation of the liquid flow sound, the operation parameters of the outdoor fan 6 and the compressor 8 are adjusted until the refrigerant returns to the supercooling zone, so that the influence of the rotating speed of the fan and the frequency of the compressor 8 on the indoor temperature is avoided, and the comfort of the user is ensured.
In an embodiment, referring to fig. 8, the air conditioner control method further includes the steps of: S151-S153.
S151, acquiring an indoor environment temperature and a target set temperature;
s152, judging whether the temperature difference between the indoor environment temperature and the target set temperature is larger than a first preset temperature difference;
and S153, if the temperature difference between the indoor environment temperature and the target set temperature is larger than a first preset temperature difference, controlling the indoor fan 2 to reduce the rotating speed.
In this embodiment, in order to avoid the increase of the overall heat exchange amount of the air conditioner due to the frequency increase of the outdoor compressor 8 and the increase of the rotating speed of the outdoor fan 6, and further to avoid the reduction of the comfort experience of the user due to the change of the indoor temperature, this embodiment also adopts other control modes to solve the problem. Specifically, a temperature set by the user (target set temperature) and an indoor ambient temperature are first acquired, the temperature set by the user being, for example, 26 °, and the indoor ambient temperature being 27 °. The temperature difference between the acquired indoor ambient temperature and the target set temperature is determined, and the temperature difference is 1 ° as in the above example. A first preset temperature difference is preset, for example a first preset temperature difference of 2 °. And judging whether the temperature difference between the indoor environment temperature and the target set temperature exceeds a first preset temperature difference, if so, indicating that the operation parameter adjusted by the air conditioner at the outdoor side is excessive, namely, too much heat exchange is carried out at the outdoor side, and if the operation parameter adjusted by the air conditioner at the outdoor side is reduced, a certain supercooling degree cannot be ensured, so that the possibility of generating liquid flow sound exists. Therefore, in order to avoid generating the liquid flow sound and avoid causing excessive influence on the indoor temperature, the present embodiment adopts the mode of controlling the rotating speed of the indoor fan 2 to solve, namely, controlling the rotating speed of the indoor fan 2 to reduce the heat exchange quantity of the indoor unit, so that the indoor environment temperature is recovered to be consistent with the target set temperature, thereby not only ensuring that the liquid flow sound cannot be generated, but also not influencing the indoor environment temperature, and ensuring the comfort of the user. Illustratively, if the difference between the indoor environment temperature and the target set temperature is more than 2 ℃, the human body is easy to feel cold and hot, so when Ts (set temperature) -Tn (indoor temperature) > 2 ℃, the indoor fan 2 is reduced at the rate of 50RPM/min, so that the heat exchange capacity of the indoor unit is reduced, and the comfort of the user is ensured.
In one embodiment, referring to fig. 9, the air conditioner control method further includes the steps of: S154-S155.
S154, judging whether the temperature difference between the indoor environment temperature and the target set temperature is smaller than a second preset temperature difference or not;
and S155, if the temperature difference between the indoor environment temperature and the target set temperature is smaller than a second preset temperature difference, controlling the indoor fan 2 to stop reducing the rotating speed.
In this embodiment, after controlling the indoor fan 2 to reduce the rotation speed, the heat exchange amount of the indoor unit will be reduced, and in order to avoid the comfort that the continuous reduction of the heat exchange amount of the indoor unit affects the use of the user, the present embodiment further controls the indoor fan 2 by setting the second preset temperature difference. In particular, a second predetermined temperature difference is predetermined, for example 0.5 °, wherein the second predetermined temperature difference is smaller than the first predetermined temperature difference. After controlling the indoor fan 2 to reduce the rotation speed, the temperature difference between the indoor ambient temperature and the target set temperature is gradually reduced, and when the temperature difference is reduced to be smaller than the first preset temperature difference, the indoor fan 2 can be controlled to stop reducing the rotation speed. Illustratively, when the temperature difference is smaller than the second predetermined temperature difference, i.e., -0.5 ≦ Ts (set temperature) - -Tn (indoor temperature) ≦ 0.5, the rotation speed variation of the indoor fan 2 is stopped, and the supercooling degree of the refrigerant at the outdoor side can also be increased by reducing the rotation speed of the indoor fan.
With reference to fig. 1, an embodiment of the present invention further provides an air conditioner, including an indoor unit and an outdoor unit connected to the indoor unit through a pipe, where the outdoor unit includes a throttling device 5, a temperature sensor 3, and a pressure sensor 4, the temperature sensor 3 and the pressure sensor 4 are disposed at positions in the pipe where refrigerant flows out of the throttling device 5, the temperature sensor 3 is configured to obtain a current temperature after throttling of the refrigerant, and the pressure sensor 4 is configured to obtain a current pressure after throttling of the refrigerant; wherein the air conditioner executes the control method.
In one example, referring to fig. 10, fig. 10 is a control logic diagram of the air conditioner of the present embodiment when the above control method is executed. Firstly, detecting the pressure P and the temperature T of a refrigerant (refrigerant), then calculating the saturated liquid temperature Tb of the current refrigerant (refrigerant), then judging whether T is greater than Tb-1, if not, executing a control action, if so, indicating that the refrigerant is supersaturated, and controlling the rotating speed of an outdoor fan 6 to rise at a rate of 50RPM/min and the frequency of a compressor 8 to rise at a rate of 2 Hz/min. After the control actions of the outdoor fan 6 and the compressor 8 are executed, on one hand, whether T < Tb-1 is continuously judged, if T < Tb-1 is judged, the refrigerant is in an overcooling area, operation parameters do not need to be adjusted, and the compressor 8 is controlled to stop increasing the frequency and the outdoor fan 6 is controlled to stop increasing the rotating speed; if otherwise, indicating that the refrigerant is still over-saturated, no action is taken. And on the other hand, judging whether the temperature difference between the indoor environment temperature and the temperature set by the user is larger than a first preset temperature value, if so, namely when Ts (set temperature) -Tn (indoor temperature) > 2 ℃, reducing the indoor fan 2 at the speed of 50RPM/min so as to reduce the heat exchange quantity of the indoor unit, and if not, not executing the action. And finally, continuously judging whether the temperature difference between the indoor environment temperature and the temperature set by the user is smaller than a second preset temperature threshold value, namely when Ts (set temperature) -Tn (indoor temperature) is smaller than or equal to-0.5 and smaller than or equal to 0.5, stopping the action of the change of the rotating speed of the indoor fan 2, and reducing the rotating speed of the inner fan to improve the supercooling degree of the refrigerant at the outdoor side.
The air conditioner of the embodiment controls the outdoor fan 6 to increase the rotating speed and controls the compressor 8 to increase the operating frequency according to the current temperature of the refrigerant and the saturated liquid temperature of the refrigerant, so that the heat exchange quantity of the outdoor unit is increased, the temperature of the refrigerant on the outdoor side is reduced, the supercooling degree of the refrigerant is increased, the refrigerant falls in an supercooling zone after being throttled, namely the refrigerant is still liquid after being throttled, the generation of liquid flow sound due to a gas-liquid two-phase state is avoided, the noise of the liquid flow sound is fundamentally eliminated, the indoor temperature is not influenced, and the use comfort of a user is improved.
Fig. 11 is a schematic block diagram of an air conditioner control device 200 according to an embodiment of the present invention. As shown in fig. 11, the present invention also provides an air conditioner control device 200 corresponding to the above air conditioner control method. The air conditioner control device 200 includes a unit for performing the above-described air conditioner control method, and the device may be configured in an air conditioner. Specifically, referring to fig. 11, the air conditioner control device 200 includes an acquisition unit 201 determination unit 202 and a control unit 203.
The system comprises an acquisition unit 201, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature and the current pressure of the refrigerant after the refrigerant flows through a throttling device; a determining unit 202 for determining a saturated liquid temperature of the refrigerant from the current pressure of the refrigerant; a control unit 203, configured to control an outdoor fan to increase a rotation speed and/or a compressor to increase an operation frequency if it is detected that the current temperature of the refrigerant is higher than the saturated liquid temperature.
In some embodiments, such as the present embodiment, the air conditioner control device 200 includes a saturation determination unit and a first stop unit.
Wherein the saturation judging unit is used for judging whether the current temperature of the refrigerant is less than the saturated liquid temperature; and the first stopping unit is used for controlling the outdoor fan to stop increasing the rotating speed and/or the compressor to stop increasing the running frequency if the current temperature of the refrigerant is less than the saturated liquid temperature.
In some embodiments, such as the present embodiment, the air conditioner control device 200 includes a temperature acquisition unit, a first temperature difference determination unit, and a rotation speed reduction unit.
The temperature acquisition unit is used for acquiring indoor environment temperature and target set temperature; a first temperature difference determination unit configured to determine whether a temperature difference between the indoor ambient temperature and the target set temperature is greater than a first preset temperature difference; and the rotating speed reduction unit is used for controlling the indoor fan to reduce the rotating speed if the temperature difference between the indoor environment temperature and the target set temperature is greater than a first preset temperature difference.
In some embodiments, for example, the air conditioner control device 200 includes a second temperature difference determination unit and a second stop unit.
The second temperature difference judging unit is used for judging whether the temperature difference between the indoor environment temperature and the target set temperature is smaller than a second preset temperature difference or not; and the second stopping unit is used for controlling the indoor fan to stop reducing the rotating speed if the temperature difference between the indoor environment temperature and the target set temperature is smaller than a second preset temperature difference.
In some embodiments, such as the present embodiment, the determination unit 202 includes a pressure-enthalpy diagram unit and a determination subunit.
The system comprises a refrigerant, a pressure-enthalpy diagram unit, a temperature sensor and a temperature sensor, wherein the pressure-enthalpy diagram unit is used for acquiring a pressure-enthalpy diagram corresponding to the refrigerant; a determining subunit for determining the saturated liquid temperature corresponding to the current pressure of the refrigerant according to the pressure-enthalpy diagram.
In some embodiments, such as the present embodiment, the determining subunit includes a temperature determining unit and a calculating unit.
Wherein the temperature determination unit is used for determining a temperature value corresponding to the current pressure of the refrigerant according to the pressure-enthalpy diagram; and the calculating unit is used for calculating the saturated liquid temperature according to the temperature value and a preset allowance.
The above-described air conditioner control device may be implemented in the form of a computer program that can be run on the air conditioner as shown in fig. 12.
Referring to fig. 12, fig. 12 is a schematic block diagram of an air conditioner according to an embodiment of the present invention. The air conditioner 300 includes an indoor unit and an outdoor unit, and the outdoor unit includes a throttling device, a temperature sensor, and a pressure sensor.
Referring to fig. 12, the air conditioner 300 includes a processor 302, a memory, which may include a nonvolatile storage medium 303 and an internal memory 304, and a network interface 305 connected through a system bus 301.
The nonvolatile storage medium 303 may store an operating system 3031 and a computer program 3032. The computer program 3032, when executed, may cause the processor 302 to perform an air conditioner control method.
The processor 302 is used to provide computing and control capabilities to support the operation of the overall air conditioner 300.
The internal memory 304 provides an environment for running the computer program 3032 in the nonvolatile storage medium 303, and the computer program 3032, when executed by the processor 302, causes the processor 302 to execute an air conditioner control method.
The network interface 305 is used for network communication with other devices. It will be understood by those skilled in the art that the configuration shown in fig. 12 is a block diagram of only a portion of the configuration associated with the inventive arrangements and is not intended to limit the air conditioner 300 to which the inventive arrangements are applied, and that a particular air conditioner 300 may include more or less components than those shown, or some components may be combined, or have a different arrangement of components.
Wherein the processor 302 is configured to run a computer program 3032 stored in the memory to implement any of the embodiments of the air conditioner control method described above.
It should be understood that, in the embodiment of the present invention, the Processor 302 may be a Central Processing Unit (CPU), and the Processor 302 may also be other general-purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. Wherein a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will be understood by those skilled in the art that all or part of the flow of the method implementing the above embodiments may be implemented by a computer program instructing associated hardware. The computer program may be stored in a storage medium, which is a computer-readable storage medium. The computer program is executed by at least one processor in the computer system to implement the flow steps of the embodiments of the method described above.
Accordingly, the present invention also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium stores a computer program. The computer program, when executed by a processor, causes the processor to perform any of the embodiments of the air conditioner control method described above.
The storage medium may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, which can store various computer readable storage media of program codes.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be merged, divided and deleted according to actual needs. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a storage medium. Based on such understanding, the technical solution of the present invention may be substantially or partially contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing an air conditioner to perform all or part of the steps of the method according to the embodiments of the present invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, while the invention has been described with respect to the specific embodiments, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An air conditioner control method, characterized in that the method comprises:
acquiring the current temperature and the current pressure of the refrigerant after the refrigerant is throttled;
determining a saturated liquid temperature of the refrigerant from the current pressure of the refrigerant;
and if the current temperature of the refrigerant is detected to be higher than the saturated liquid temperature, controlling an outdoor fan to increase the rotating speed and/or controlling a compressor to increase the running frequency.
2. The method of claim 1, wherein after the step of controlling the outdoor fan to increase the speed and/or the compressor to increase the operating frequency if the current temperature of the refrigerant is detected to be greater than the saturated liquid temperature, the method further comprises:
determining whether the current temperature of the refrigerant is less than the saturated liquid temperature;
and if the current temperature of the refrigerant is lower than the saturated liquid temperature, controlling the outdoor fan to stop increasing the rotating speed and/or controlling the compressor to stop increasing the running frequency.
3. The method of claim 1, wherein after the step of controlling the outdoor fan to increase the speed and/or the compressor to increase the operating frequency if the current temperature of the refrigerant is detected to be greater than the saturated liquid temperature, the method further comprises:
acquiring an indoor environment temperature and a target set temperature;
judging whether the temperature difference between the indoor environment temperature and the target set temperature is larger than a first preset temperature difference or not;
and if the temperature difference between the indoor environment temperature and the target set temperature is greater than a first preset temperature difference, controlling the indoor fan to reduce the rotating speed.
4. The method according to claim 3, wherein the step of controlling the indoor fan to rotate down further comprises, after the step of controlling the indoor fan to rotate down if the temperature difference between the indoor ambient temperature and the target set temperature is greater than a first preset temperature difference:
judging whether the temperature difference between the indoor environment temperature and the target set temperature is smaller than a second preset temperature difference or not;
and if the temperature difference between the indoor environment temperature and the target set temperature is smaller than a second preset temperature difference, controlling the indoor fan to stop reducing the rotating speed.
5. The method of any of claims 1-4, wherein the step of determining a saturated liquid temperature of the refrigerant as a function of the current pressure of the refrigerant comprises:
acquiring a pressure-enthalpy diagram corresponding to the refrigerant;
determining the saturated liquid temperature corresponding to the current pressure of the refrigerant from the pressure-enthalpy map.
6. The method of claim 5, wherein said step of determining said saturated liquid temperature corresponding to said current pressure of said refrigerant from said pressure-enthalpy map comprises:
determining a temperature value corresponding to the current pressure of the refrigerant from the pressure-enthalpy map;
and calculating the temperature of the saturated liquid according to the temperature value and a preset margin.
7. An air conditioner is characterized by comprising an indoor unit and an outdoor unit connected with the indoor unit through a pipeline, wherein the outdoor unit comprises a throttling device, a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor are arranged at the position, in the pipeline, of a refrigerant flowing out of the throttling device, the temperature sensor is used for obtaining the current temperature after the refrigerant is throttled, and the pressure sensor is used for obtaining the current pressure after the refrigerant is throttled; wherein the air conditioner performs the control method according to any one of claims 1 to 6.
8. An air conditioner control device, comprising:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current temperature and the current pressure of the refrigerant after the refrigerant flows through a throttling device;
a determination unit for determining a saturated liquid temperature of the refrigerant according to the current pressure of the refrigerant;
and the control unit is used for controlling the outdoor fan to increase the rotating speed and/or the compressor to increase the running frequency if the current temperature of the refrigerant is detected to be higher than the saturated liquid temperature.
9. An air conditioner, characterized in that the air conditioner comprises a memory, on which a computer program is stored, and a processor, which when executing the computer program, implements the method according to any one of claims 1-6.
10. A computer-readable storage medium, characterized in that the storage medium stores a computer program which, when being executed by a processor, is adapted to carry out the method according to any one of claims 1-6.
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