CN210154138U - Expansion valve assembly, bidirectional throttling system and air conditioner - Google Patents
Expansion valve assembly, bidirectional throttling system and air conditioner Download PDFInfo
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- CN210154138U CN210154138U CN201920734832.4U CN201920734832U CN210154138U CN 210154138 U CN210154138 U CN 210154138U CN 201920734832 U CN201920734832 U CN 201920734832U CN 210154138 U CN210154138 U CN 210154138U
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Abstract
The utility model provides an expansion valve subassembly, two-way throttle system and air conditioner, the expansion valve subassembly includes: the first check valve, the second check valve, the heating expansion valve, the fourth check valve, the third check valve and the refrigeration expansion valve which are connected in series realize independent type selection and independent operation of the heating expansion valve and the refrigeration expansion valve through the scheme, and when the difference between the required refrigerating capacity and the heating capacity is large, the refrigeration expansion valve and the heating expansion valve which are matched more can be selected according to the refrigerating and heating operation modes, so that more accurate adjustment of refrigerating and heating is realized.
Description
Technical Field
The utility model relates to an air conditioner technical field particularly, relates to an expansion valve subassembly, two-way throttle system and air conditioner.
Background
A common heat pump unit with an expansion valve as a throttling component usually has only one expansion valve, but the throttling requirements of a refrigeration mode and a heating mode on a flow path are met at the same time; therefore, when the difference between the refrigerating capacity and the heating capacity of the unit is large, the single expansion valve cannot simultaneously give consideration to the refrigerating effect and the heating effect, so that the air conditioning effect is greatly discounted.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention is directed to an expansion valve assembly that solves at least one of the above problems to some extent.
In order to solve the above problem, the utility model provides an expansion valve assembly, expansion valve assembly includes: the first check valve, the second check valve, the heating expansion valve, the fourth check valve, the third check valve and the refrigeration expansion valve are connected in series.
Optionally, the refrigeration expansion valve and the heating expansion valve are thermal expansion valves or electronic expansion valves.
And flexible selection is carried out according to actual needs.
Compared with the prior art, the expansion valve component has the following advantages
Expansion valve subassembly, realize heating expansion valve, refrigeration expansion valve independent lectotype, independent operation through this scheme, when required refrigerating output and heating capacity difference are great, can select the refrigeration expansion valve that matches more and the expansion valve that heats to the operation mode that heats to realize the more accurate regulation of refrigeration heating.
A bidirectional throttling system comprises the expansion valve assembly, a compressor, an outdoor heat exchanger and an indoor heat exchanger, wherein all the parts are connected through pipelines, one end of the indoor heat exchanger is connected to a pipeline between the refrigeration expansion valve and the third one-way valve, the other end of the indoor heat exchanger is connected with the compressor, one end of the outdoor heat exchanger is connected to a pipeline between the heating expansion valve and the fourth one-way valve, and the other end of the outdoor heat exchanger is connected with the compressor.
Optionally, the device further comprises a liquid storage device, one end of the liquid storage device is connected to a pipeline between the third one-way valve and the fourth one-way valve, and the other end of the liquid storage device is connected to a pipeline between the first one-way valve and the second one-way valve.
Preventing the compressor from sucking liquid refrigerant to cause liquid impact.
Optionally, a dry filter is further disposed on a pipeline connecting the reservoir between the first one-way valve and the second one-way valve.
The system and the expansion valve are prevented from being blocked, the pipeline system is ensured to be smooth, and the service life of the system is prolonged.
Optionally, the indoor heat exchanger is connected with the indoor heat exchanger through a first interface of the four-way valve, the indoor heat exchanger is connected with the indoor heat exchanger through a second interface of the four-way valve, the outdoor heat exchanger is connected with the third interface of the four-way valve, and the fourth interface of the four-way valve is connected with the air outlet of the compressor.
By controlling the communication condition of the four interfaces of the four-way valve, the circulation routes of the refrigerant in the refrigeration mode and the refrigerant in the heating mode of the system are controlled to be different.
Optionally, the system further comprises a gas-liquid separator, and the gas-liquid separator is arranged on a pipeline connecting the second interface of the four-way valve and the air inlet of the compressor.
The gas-liquid separator can prevent the air inlet of the compressor from sucking liquid refrigerant to generate liquid impact to damage the compressor, and further protect the compressor.
Optionally, a fan is disposed outside the indoor heat exchanger.
The fan blows cold air or hot air around the indoor heat exchanger to the indoor space, and forced convection is carried out, so that the indoor temperature is reduced or increased, and the aim of quickly adjusting the air temperature is fulfilled.
Optionally, the four-way valve controls the system to operate in a cooling mode or a heating mode by direction change switching.
The system changes the flow direction of the refrigerant in the system pipeline through the four-way valve to realize the interconversion between refrigeration and heating.
Optionally, when the system operates in the cooling mode, a fourth interface of the four-way valve is communicated with a third interface of the four-way valve, and a first interface of the four-way valve is communicated with a second interface of the four-way valve.
The refrigerant circuit is used for realizing the refrigerant circuit circulation of the system in the refrigeration mode.
Optionally, when the system operates in the heating mode, the first interface of the four-way valve is communicated with the fourth interface of the four-way valve, and the third interface of the four-way valve is communicated with the second interface of the four-way valve.
The refrigerant is circulated in a route of the system in the heating mode.
Compared with the prior art, the bidirectional throttling system has the following advantages:
two-way throttle system, when refrigeration and the mode of heating different, system operation refrigerant circulation direction is different, match the more suitable refrigeration expansion valve and the expansion valve that heats to refrigeration, heating alone to realize more accurate control.
An air conditioner comprises the bidirectional throttling system.
The advantages of the air conditioner and the bidirectional throttling system are the same compared with the prior art, and are not described in detail herein.
Drawings
Fig. 1 is a schematic structural view of an expansion valve assembly according to the present invention;
fig. 2 is a schematic structural view of the bidirectional throttling system according to the present invention;
fig. 3 is a schematic diagram of a refrigerant cycle of the bidirectional throttling system according to the present invention in a cooling mode;
fig. 4 is a schematic diagram of the refrigerant cycle of the bidirectional throttling system according to the present invention in the heating mode.
Description of reference numerals:
1. the air conditioner comprises a first one-way valve, a second one-way valve, a heating expansion valve, a fourth one-way valve, a third one-way valve, a refrigerating expansion valve, a compressor, a 71, an air inlet, a 72, an air outlet, an outdoor heat exchanger, a 9, an indoor heat exchanger, a 10, a fan, a 11, a liquid storage device, a 12, a drying filter, a 13, a four-way valve, a 131, a first interface, a 132, a second interface, a 133, a third interface, a 134, a fourth interface, a 14 and a gas-liquid separator.
Detailed Description
The heat pump type air conditioner is an energy-saving air conditioning mode for heating in winter and cooling in summer, and the common heat pump type air conditioners are air-cooled heat pump air conditioners and air conditioners according to the cooling modes of condensers, wherein a small heat pump unit with stable refrigerating and heating conditions and relatively small cooling and heating capacity basically takes a capillary throttling air-cooled heat pump as a main part, and a medium-large heat pump unit with large refrigerating capacity and heating capacity difference basically takes an expansion valve throttling water-cooled heat pump unit as a main part.
The expansion valve is selected according to whether the load fluctuation of the evaporator is large or not (the fluctuation is small according to the load configuration of the 130% evaporator, and the fluctuation is large according to the load configuration of the 170%) under the general condition, which also fully shows that the load fluctuation has great influence on the selection of the expansion valve, when the difference between the refrigerating capacity and the heating capacity is large, if the expansion valve is selected according to the heating capacity, the expansion valve can cause the liquid carrying in the air suction and the liquid impact of the unit easily because the expansion valve is too large during the operation of refrigeration; if the expansion valve is selected according to the refrigerating capacity, the suction superheat degree is large due to the fact that the expansion valve is too small during operation and heating, the heat exchange area of the evaporator cannot be effectively utilized, the suction superheat degree of the compressor is large, exhaust gas is increased to a certain extent, and the like. In summary, whether the expansion valve is selected according to the refrigeration or the heating is carefully considered when selecting the expansion valve, the expansion valve often selected combines the heating and the refrigeration effects, and it is very difficult to select the expansion valve when the difference between the heating and the cooling capacity is large.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the expansion valve assembly is composed of a first check valve 1, a second check valve 2, a heating expansion valve 3, a fourth check valve 4, a third check valve 5 and a cooling expansion valve 6 which are connected in series end to end in sequence.
When operating in the cooling mode, the refrigerant flows through the fourth check valve 4, the first check valve 1, and the cooling expansion valve 6 and is supplied to the indoor heat exchanger 9, and the refrigerant is reversely cut off by the third check valve 5 and the second check valve 2. When operating in the heating mode, the refrigerant flows through the third check valve 5, the second check valve 2, and the heating expansion valve 3, and is supplied to the outdoor heat exchanger 8, and the refrigerant is reversely cut off by the fourth check valve 4 and the first check valve 1. The refrigeration expansion valve 6 and the heating expansion valve 3 are thermal expansion valves or electronic expansion valves, and the combined structure is unchanged.
The electronic expansion valve or the thermostatic expansion valve is controlled according to the suction superheat degree, an air inlet temperature sensor and a pressure sensor are arranged on an air inlet pipe of the compressor 7 and are respectively used for sensing the air inlet temperature and the air inlet pressure, the controller calculates the actual superheat degree according to the sensed air inlet temperature and the sensed air inlet pressure and compares the actual superheat degree with the set superheat degree, PID operation is carried out to adjust and control the opening degree of a valve port of the electronic expansion valve or the thermostatic expansion valve, and therefore the air inlet superheat degree is always controlled within a certain range, and for an air conditioning system adopting a dry evaporator, the generally set superheat degree range is 4-10 ℃. The electronic expansion valve or the thermostatic expansion valve adopts air inlet superheat degree control, has wide adjusting range and high precision, is suitable for an air conditioning system with a constant volume and variable volume compressor, and can realize normal heating operation under the working condition that the lowest environmental temperature is-30 ℃.
The expansion valve assembly realizes independent type selection and independent operation of the heating expansion valve and the refrigeration expansion valve, and can select the refrigeration expansion valve and the heating expansion valve which are matched more aiming at the refrigeration and heating operation modes when the difference between the required refrigeration capacity and the heating capacity is larger, so that more accurate adjustment of refrigeration and heating is realized.
As shown in fig. 2, a two-way throttle system includes an expansion valve assembly as described above, which is connected to other components of the two-way throttle system by a three-way valve. The system also comprises a compressor 7, an outdoor heat exchanger 8 and an indoor heat exchanger 9, all the parts are connected through pipelines, and liquid refrigerant circulates in the pipelines. The outdoor heat exchanger 8 functions as an evaporator when the two-way throttle system operates in the heating mode, functions as a condenser when the two-way throttle system operates in the cooling mode, and the indoor heat exchanger 9 functions as an evaporator when the two-way throttle system operates in the cooling mode, and functions as a condenser when the two-way throttle system operates in the heating mode. The indoor heat exchanger 9 and the outdoor heat exchanger 8 may be a plate heat exchanger, a shell-and-tube heat exchanger, or a double-tube heat exchanger. One end of the indoor heat exchanger 9 is connected to a pipeline between the refrigeration expansion valve 6 and the third check valve 5, specifically, one end of the indoor heat exchanger 9 is connected to a pipeline between the refrigeration expansion valve 6 and the third check valve 5 through a T-shaped tee joint, the other end of the indoor heat exchanger 9 is connected to the compressor 7, one end of the outdoor heat exchanger 8 is connected to a pipeline between the heating expansion valve 3 and the fourth check valve 4, specifically, one end of the outdoor heat exchanger 8 is connected to a pipeline between the heating expansion valve 3 and the fourth check valve 4 through a T-shaped tee joint, the other end of the outdoor heat exchanger 8 is connected to the compressor 7, and the expansion valve assembly is arranged to realize that the refrigerant of the system respectively circulates in different routes in the refrigeration mode or the heating mode, therefore, a more matched refrigeration expansion valve and a heating expansion valve can be selected according to the refrigeration and heating operation modes, and more accurate adjustment of refrigeration and heating is realized.
The refrigerant storage device comprises a liquid storage device 11, one end of the liquid storage device 11 is connected to a pipeline between a third one-way valve 5 and a fourth one-way valve 4, specifically, one end of the liquid storage device 11 is connected to a pipeline between the third one-way valve 5 and the fourth one-way valve 4 through a T-shaped tee joint, the other end of the liquid storage device 11 is connected to a pipeline between the first one-way valve 1 and the second one-way valve 2, specifically, the other end of the liquid storage device 11 is connected to a pipeline between the first one-way valve 1 and the second one-way valve 2 through a T-shaped tee joint, the liquid storage device 11 can store refrigerant and supply the refrigerant to an indoor heat exchanger or an outdoor heat exchanger continuously, and the refrigerant can not be completely vaporized when the air conditioning system is in operation; namely, the liquid refrigerant can enter the liquid storage device from the refrigerant coming out of the evaporator, the liquid refrigerant which is not vaporized can directly fall on the cylinder bottom of the liquid storage device because the refrigerant is heavier than gas, and the vaporized refrigerant enters the compressor from the outlet of the liquid storage device, so that the liquid impact caused by the liquid refrigerant sucked by the compressor is prevented. In addition, in other embodiments, according to actual use needs, an air conditioning system with a large capacity needs to be provided with a liquid storage device, the air conditioning system with a refrigerating capacity smaller than 30KW may not be provided with the liquid storage device, and the volume of a gas-liquid separator of the air conditioning system without the liquid storage device needs to be designed to be slightly larger.
The liquid storage device 11 is connected with a pipeline between the first one-way valve 1 and the second one-way valve 2, a drying filter 12 is further arranged on the pipeline, the drying filter 12 is used for collecting solid impurities in a refrigerating system and a refrigerant, the system and an expansion valve are prevented from being blocked, the pipeline system is guaranteed to be smooth, and the service life of the system is prolonged.
The system is characterized by further comprising a four-way valve 13, wherein a first interface 131 of the four-way valve 13 is connected with the indoor heat exchanger 9, a second interface 132 of the four-way valve 13 is connected with an air inlet 71 of the compressor 7, a third interface 133 of the four-way valve 13 is connected with the outdoor heat exchanger 8, a fourth interface 134 of the four-way valve 13 is connected with an air outlet 72 of the compressor 7, and different circulation routes of the refrigerant in a system cooling mode and a system heating mode are controlled by controlling the communication condition of the four interfaces of the four-way valve 13.
The air-liquid separator 14 is arranged on a pipeline connecting the second interface 132 of the four-way valve 13 and the air inlet 71 of the compressor 7, and the air-liquid separator 14 can prevent the air inlet of the compressor 7 from sucking liquid refrigerant to generate liquid impact and damage the compressor 7, so that the compressor 7 is further protected.
The fan 10 is arranged on the outer side of the indoor heat exchanger 9, cold air or hot air around the indoor heat exchanger is blown to the indoor by the fan 10, forced convection is carried out, the indoor temperature is reduced or increased, and the purpose of quickly adjusting the air temperature is achieved.
The four-way valve 13 controls the system to operate in a cooling mode or a heating mode by changing the direction of change, and the system changes the flow direction of a refrigerant in a system pipeline through the four-way valve to realize the interconversion between cooling and heating.
When the system operates in the cooling mode, the fourth interface 134 of the four-way valve 13 is communicated with the third interface 133 of the four-way valve 13, and the first interface 131 of the four-way valve 13 is communicated with the second interface 132 of the four-way valve 13, so that the refrigerant is circulated in a route under the cooling mode.
When the system operates in the heating mode, the first port 131 of the four-way valve 13 is communicated with the fourth port 134 of the four-way valve 13, and the third port 133 of the four-way valve 13 is communicated with the second port 132 of the four-way valve 13, so that the refrigerant is circulated in a route under the heating mode.
As shown in fig. 4, when the system operates in the heating mode, the refrigerant is changed into high-temperature and high-pressure gas by the compressor 7, and the high-temperature and high-pressure gas flows through the fourth port 134 and the first port 131 of the four-way valve 13 to enter the indoor heat exchanger 9, and is condensed to release heat to heat indoor air, and the high-temperature and high-pressure gas is cooled to be medium-temperature and high-pressure liquid, flows out of the indoor heat exchanger 9, enters the liquid reservoir 11 through the third one-way valve 5, enters the drying filter 12, enters the heating expansion valve 3 through the second one-way valve 2, is changed into low-temperature and low-pressure liquid, enters the outdoor heat exchanger 8, is changed into medium-temperature and low-pressure gas through evaporation and heat absorption in the outdoor heat exchanger 8, and then enters the compressor 7 through the third port 133.
As shown in fig. 3, when the system operates in the cooling mode, the refrigerant changes into high-temperature and high-pressure gas under the action of the compressor 7, enters the outdoor heat exchanger 8 through the fourth interface 134 and the third interface 133 of the four-way valve 13, condenses and releases heat to be absorbed by liquid water around the outdoor heat exchanger 8, is cooled into medium-temperature and high-pressure liquid, flows out of the outdoor heat exchanger 8, enters the liquid reservoir 11 through the fourth one-way valve 4, further enters the drying filter 12, further enters the cooling expansion valve 6 through the first one-way valve 1, changes into low-temperature and low-pressure liquid, enters the indoor heat exchanger 9, changes into medium-temperature and low-pressure gas through evaporation and heat absorption in the indoor heat exchanger 9, and then enters the compressor 7 through the first interface 131, the second interface 132 and the gas-liquid separator 14 of the four-way valve 13 in sequence.
The refrigeration expansion and heating expansion valves are mutually independent and do not interfere with each other, and during model selection, the refrigeration thermostatic expansion valve performs model selection according to the indoor evaporation temperature, the outdoor condensation temperature, the required refrigeration capacity and the pressure difference between the inlet and the outlet of the expansion valve in a refrigeration mode; the heating expansion valve is selected according to the indoor condensing temperature, the outdoor evaporating temperature, the required heating quantity and the pressure difference between the inlet and the outlet of the expansion valve in the heating mode, and the more suitable refrigerating expansion valve and the heating expansion valve are matched under the operation conditions of the refrigerating mode and the heating mode of the system independently, so that more accurate control is realized.
An air conditioner comprises the bidirectional throttling system.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (12)
1. An expansion valve assembly, comprising: the heating expansion valve comprises a first check valve (1), a second check valve (2), a heating expansion valve (3), a fourth check valve (4), a third check valve (5) and a refrigerating expansion valve (6) which are connected in series.
2. An expansion valve assembly according to claim 1, wherein the refrigeration expansion valve (6) and the heating expansion valve (3) are thermostatic expansion valves or electronic expansion valves.
3. A two-way throttle system, comprising an expansion valve assembly as claimed in any one of claims 1-2, further comprising a compressor (7), an outdoor heat exchanger (8) and an indoor heat exchanger (9), all of which are connected by pipelines, wherein one end of the indoor heat exchanger (9) is connected to the pipeline between the refrigeration expansion valve (6) and the third check valve (5), the other end of the indoor heat exchanger (9) is connected to the compressor (7), one end of the outdoor heat exchanger (8) is connected to the pipeline between the heating expansion valve (3) and the fourth check valve (4), and the other end of the outdoor heat exchanger (8) is connected to the compressor (7).
4. A two-way throttling system according to claim 3, further comprising a reservoir (11), one end of said reservoir (11) being connected to the line between the third one-way valve (5) and the fourth one-way valve (4), the other end of said reservoir (11) being connected to the line between the first one-way valve (1) and the second one-way valve (2).
5. The two-way throttling system according to claim 4, characterized in that the reservoir (11) is further provided with a dry filter (12) in a line connecting between the first one-way valve (1) and the second one-way valve (2).
6. The two-way throttle system of claim 3, further comprising a four-way valve (13), wherein a first port (131) of the four-way valve (13) is connected to the indoor heat exchanger (9), a second port (132) of the four-way valve (13) is connected to the air inlet (71) of the compressor (7), a third port (133) of the four-way valve (13) is connected to the outdoor heat exchanger (8), and a fourth port (134) of the four-way valve (13) is connected to the air outlet (72) of the compressor (7).
7. The two-way throttle system according to claim 6, characterized by further comprising a gas-liquid separator (14), said gas-liquid separator (14) being disposed on a line connecting the second connection port (132) of said four-way valve (13) and the air inlet (71) of said compressor (7).
8. A bi-directional throttling system according to claim 3, characterized in that a fan (10) is provided outside said indoor heat exchanger (9).
9. The bidirectional throttling system of claim 6, wherein the four-way valve (13) controls the system to operate in a cooling mode or a heating mode by direction change switching.
10. The two-way throttle system of claim 9, wherein when the system is operating in the cooling mode, the fourth port (134) of the four-way valve (13) is in communication with the third port (133) of the four-way valve (13), and the first port (131) of the four-way valve (13) is in communication with the second port (132) of the four-way valve (13).
11. The two-way throttle system of claim 9, wherein when the system is operating in the heating mode, the first port (131) of the four-way valve (13) is in communication with the fourth port (134) of the four-way valve (13), and the third port (133) of the four-way valve (13) is in communication with the second port (132) of the four-way valve (13).
12. An air conditioner characterized by comprising the bidirectional throttle system as set forth in any one of claims 3 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920734832.4U CN210154138U (en) | 2019-05-21 | 2019-05-21 | Expansion valve assembly, bidirectional throttling system and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920734832.4U CN210154138U (en) | 2019-05-21 | 2019-05-21 | Expansion valve assembly, bidirectional throttling system and air conditioner |
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| CN210154138U true CN210154138U (en) | 2020-03-17 |
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| CN201920734832.4U Active CN210154138U (en) | 2019-05-21 | 2019-05-21 | Expansion valve assembly, bidirectional throttling system and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057144A (en) * | 2019-05-21 | 2019-07-26 | 宁波奥克斯电气股份有限公司 | A kind of expansion valve component, bidirectional throttle system and air conditioner |
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2019
- 2019-05-21 CN CN201920734832.4U patent/CN210154138U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057144A (en) * | 2019-05-21 | 2019-07-26 | 宁波奥克斯电气股份有限公司 | A kind of expansion valve component, bidirectional throttle system and air conditioner |
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