Air conditioner unit

Abstract

The present invention relates to an air-conditioning unit. The air-conditioning unit includes a working circuit and an unloading branch. The working circuit includes a compressor, a condenser, and an evaporator connected in series with each other. The unloading branch includes a flow regulating valve, and the flow regulating valve is connected in parallel with the evaporator. The flow regulating valve is used to adjust the refrigerant flow rate at the outlet of the unloading branch to a target flow rate according to the change in the refrigerant flow rate at the outlet of the unloading branch. The refrigerant flow rate flowing out of the unloading branch is no longer directly affected by the refrigerant flow rate flowing into the unloading branch, but is dynamically controlled at the target flow rate. The target flow rate is designed in advance to be a relatively reasonable flow rate according to the operating conditions of the air-conditioning unit, so that the refrigerant flow rate flowing out of the unloading branch is neither too much nor too small. In this way, it can not only ensure the refrigerant flow rate for normal refrigeration work to meet the refrigeration demand, but also reduce the exhaust temperature at the air-conditioning condenser by allowing a part of the refrigerant to directly enter the compressor from the condenser, thereby ensuring the reliability of the air-conditioning operation in a super-high temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, in particular to an air conditioning unit. Background Art

[0002] In the air conditioning industry, some air conditioners need to operate reliably in extremely harsh environments. For example, some air conditioners need to operate reliably and have cooling capacity at an ambient temperature of up to 65°C. In response to high-temperature operation requirements, general air conditioning units will add an unloading branch (unloading valve plus capillary tube) between the high-pressure flow path and the low-pressure flow path to discharge part of the high-pressure side refrigerant to the low-pressure side, and reduce the exhaust temperature and exhaust pressure by adjusting the refrigerant flow rate to ensure that the unit can operate reliably under ultra-high ambient temperatures.

[0003] However, the unloading valve used in the traditional unloading method can only be opened or closed according to the pressure value, and its opening degree is uncontrollable. The capillary tube on the unloading branch can reduce the refrigerant flow on the unloading branch to prevent a large attenuation of the cooling capacity due to excessive unloading. However, once the capillary tube specifications are determined, they cannot be changed at will. Therefore, the refrigerant flow on the unloading branch cannot be automatically adjusted, and the refrigeration reliability and refrigeration capacity of the air-conditioning unit in an ultra-high temperature environment are uncontrollable. Summary of the invention

[0004] The present invention aims at the problem that the refrigeration reliability and refrigeration capacity of an air-conditioning unit in an ultra-high temperature environment are uncontrollable, and proposes an air-conditioning unit that can achieve the technical effect of taking into account both refrigeration reliability and refrigeration capacity in an ultra-high temperature environment.

[0005] An air conditioning unit, comprising a working circuit and a load-unloading branch, wherein the working circuit comprises a compressor, a condenser and an evaporator connected in series, and the load-unloading branch comprises a flow regulating valve connected in parallel with the evaporator;

[0006] The flow regulating valve is used to adjust the refrigerant flow at the outlet of the unloading branch to a target flow according to the change of the refrigerant flow at the outlet of the unloading branch.

[0007] In the above air conditioner unit, the flow regulating valve is used to adjust the refrigerant flow rate at the outlet of the unloading branch to a target flow rate according to the change in the refrigerant flow rate at the outlet of the unloading branch. This is equivalent to controlling the refrigerant flow rate flowing out of the unloading branch to the target flow rate through the flow regulating valve. The refrigerant flow rate flowing out of the unloading branch is no longer directly affected by the refrigerant flow rate flowing into the unloading branch, but is dynamically controlled at the target flow rate. This target flow rate is designed in advance to be a relatively reasonable flow rate according to the operating conditions of the air conditioner unit, so that the refrigerant flow rate flowing out of the unloading branch is neither too much nor too little. In this way, it can not only ensure the refrigerant flow rate for normal refrigeration work to meet the refrigeration demand, but also reduce the exhaust temperature at the air conditioner condenser by allowing a part of the refrigerant to directly enter the compressor from the condenser, thereby improving the reliability of the air conditioner operation in an ultra-high temperature environment. Thus, by controlling the unloading flow rate of the unloading branch, it is possible to prevent the refrigeration capacity of the air conditioner unit from decaying too much due to a large unloading amount, and at the same time ensure that the air conditioner can still operate normally in an ultra-high temperature environment, enabling the air conditioner unit to balance refrigeration reliability and refrigeration capacity in an ultra-high temperature environment.

[0008] In one embodiment, the flow regulating valve is configured such that the target flow rate is adjustable.

[0009] In one embodiment, the flow regulating valve is a thermostatic expansion valve.

[0010] In one embodiment, the thermostatic expansion valve includes a valve body, a valve core and a partition. An accommodation cavity is formed in the valve body. An inlet and an outlet that are both communicated with the accommodation cavity are provided on the valve body. The partition is arranged in the accommodation cavity, and a through hole communicating between the inlet and the outlet is provided on the partition.

[0011] Wherein, the valve core is telescopically disposed in the through hole and changes the flow area between the inner wall of the through hole and the valve core.

[0012] In one embodiment, the valve core is configured such that when the outlet flow rate of the thermostatic expansion valve is greater than the target flow rate, the valve core extends and retracts to reduce the flow area, and the valve core is configured such that when the outlet flow rate of the thermostatic expansion valve is less than the target flow rate, the valve core extends and retracts to increase the flow area.

[0013] In one embodiment, the valve core includes a core body and a force-bearing membrane. The valve body movably passes through the through hole. The force-bearing membrane is disposed on one side of the core body to divide the accommodation cavity into a first fluid cavity (421) and a second fluid cavity, and the outlet is located between the force-bearing membrane and the partition. The inlet and the outlet are both communicated with the first fluid cavity (421). An auxiliary opening communicated with the second fluid cavity is further provided on the valve body.

[0014] The thermal expansion valve further includes a temperature-sensitive package and an auxiliary pipeline. The temperature-sensitive package is arranged on a discharge pipeline connected to the outlet, and the auxiliary pipeline is connected between the temperature-sensitive package and the auxiliary opening.

[0015] In one embodiment, the thermal expansion valve further includes an adjusting component, which includes an adjusting member and an elastic member. The adjusting member is telescopically arranged on the valve body and is located on a side of the core body facing away from the force-bearing membrane. The elastic member is connected between the adjusting member and the core body.

[0016] In one of the embodiments, the thermal expansion valve is an internally balanced thermal expansion valve.

[0017] In one of the embodiments, the unloading branch further includes an unloading valve, which is connected in series with the flow regulating valve, and the unloading valve is controlled to open or close the unloading branch.

[0018] In one of the embodiments, the working circuit further includes a throttling element, which is connected in series between the condenser and the evaporator, and the throttling element is connected in parallel with the flow regulating valve.

[0019] In one embodiment, the working circuit further includes a filter element, wherein the filter element is connected in series between the condenser and the evaporator, and the filter element is connected in series with the flow regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an air conditioning unit in one embodiment of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the unloading branch in the air-conditioning unit shown.

[0022] 100. Air conditioning unit; 10. Working circuit; 12. Compressor; 14. Condenser; 16. Evaporator; 30. Unloading branch; 32. Flow regulating valve; 41. Valve body; 42. Accommodating chamber; 421. First fluid chamber; 422. Inlet; 423. Second fluid chamber; 424. Outlet; 425. Auxiliary opening; 43. Valve core; 432. Core body; 434. Force-bearing membrane; 45. Partition; 451. Through hole; 461. Temperature sensing package; 463. Auxiliary pipeline; 47. Adjustment assembly; 471. Adjustment member; 473. Elastic member; 48. Balance pipe; 50. Discharge pipeline; 60. Unloading valve; 70. Throttle member; 80. Filter member. DETAILED DESCRIPTION

[0023] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0029] Please refer to Figure 1 - Figure 2 , in an embodiment of the present invention, an air-conditioning unit 100 is provided. The air-conditioning unit 100 includes a working circuit 10. The working circuit 10 includes a compressor 12, a condenser 14 and an evaporator 16 connected in series with each other. The compressor 12, the condenser 14 and the evaporator 16 cooperate with each other to achieve heating and cooling functions. For example, when the air-conditioning unit 100 is in the cooling state, the high-temperature and high-pressure gas generated when the compressor 12 operates enters the condenser 14 to exchange heat with the external environment and condenses and cools down, and then enters the evaporator 16 to evaporate and absorb heat to cool the indoor environment. Finally, the refrigerant enters the compressor 12 again to re-perform the next round of refrigeration cycle.

[0030] The air-conditioning unit 100 further includes a unloading branch 30. The unloading branch 30 includes a flow regulating valve 32. The flow regulating valve 32 is used to adjust the refrigerant flow rate at the outlet 424 of the unloading branch 30 to a target flow rate according to the change of the refrigerant flow rate at the inlet of the unloading branch 30. It is equivalent to controlling the refrigerant flow rate flowing out of the unloading branch 30 to the target flow rate through the flow regulating valve 32. The refrigerant flow rate flowing out of the unloading branch 30 is no longer directly affected by the refrigerant flow rate flowing into the unloading branch 30, but is controlled at the target flow rate. The target flow rate is designed in advance to be a more reasonable flow rate according to the operating conditions of the air-conditioning unit 100, so that the refrigerant flow rate flowing out of the unloading branch 30 is neither too much nor too small. In this way, it can not only ensure the refrigerant flow rate for normal refrigeration work to meet the refrigeration demand, but also reduce the exhaust temperature at the air-conditioning condenser 14 by allowing a part of the refrigerant to directly enter the compressor 12 from the condenser 14, thereby improving the reliability of the air-conditioning operation in an ultra-high temperature environment. In this way, by controlling the unloading flow rate of the unloading branch 30, it is possible to prevent the refrigeration capacity of the air-conditioning unit 100 from decaying too much due to a large unloading amount, and at the same time ensure that the air-conditioning can still operate normally in an ultra-high temperature environment, so that the air-conditioning unit 100 can balance refrigeration reliability and refrigeration capacity in an ultra-high temperature environment.

[0031] In some embodiments, the flow regulating valve 32 is configured to have an adjustable target flow rate. Thus, according to the ambient temperature of the air conditioner unit 100, the target flow rate can be adjusted to an appropriate value, so as to better ensure the refrigeration capacity and reliability of the air conditioner unit 100. Optionally, the flow regulating valve 32 is a thermostatic expansion valve.

[0032] Specifically in this embodiment, the thermostatic expansion valve includes a valve body 41, a valve core 43 and a partition plate 45. An accommodation cavity 42 is formed in the valve body 41. An inlet 422 and an outlet 424, both of which communicate with the accommodation cavity 42, are formed in the valve body 41. The partition plate 45 is disposed in the accommodation cavity 42, and a through hole 451 communicating between the inlet 422 and the outlet 424 is formed in the partition plate 45. Among them, the valve core 43 is telescopically sleeved on a member passing through the through hole 451, and changes the flow area between the inner wall of the through hole 451 and the valve core 43, and thus can change the refrigerant flow rate flowing out of the thermostatic expansion valve. That is to say, by the telescopic movement of the valve core 43 in the through hole 451, the flow area is changed, and thus the refrigerant flow rate at the outlet 424 can be adjusted to the target flow rate.

[0033] Further, the valve core 43 is configured such that when the flow rate at the outlet 424 of the thermostatic expansion valve is greater than the target flow rate, the valve core 43 telescopically moves to reduce the flow area, and the valve core 43 is configured such that when the flow rate at the outlet 424 of the thermostatic expansion valve is less than the target flow rate, the valve core 43 telescopically moves to increase the flow area. That is to say, the valve core 43 can automatically telescopically move according to the size of the flow rate at the outlet 424 of the thermostatic expansion valve to change the flow area, and after the flow rate at the outlet 424 is adjusted to the target flow rate, the valve core 43 reaches a balance. For example, when the flow rate at the outlet 424 of the thermostatic expansion valve is greater than the target flow rate, the valve core 43 telescopically moves to reduce the flow area, and thus the flow rate at the outlet 424 of the thermostatic expansion valve gradually decreases to the target flow rate; when the flow rate at the outlet 424 of the thermostatic expansion valve is less than the target flow rate, the valve core 43 telescopically moves to increase the flow area, and thus the flow rate at the outlet 424 of the thermostatic expansion valve gradually increases to the target flow rate, so that the flow rate at the outlet 424 of the unloading branch 30 is dynamically adjusted to the target flow rate.

[0034] Further, the valve core 43 includes a valve body 41 and a force-receiving film 434. The valve body 41 movably passes through the through hole 451. The force-receiving film 434 is disposed on one side of the core body 432 to divide the accommodation cavity 42 into a first fluid cavity 421 and a second fluid cavity 423. The outlet 424 is located between the force-receiving film 434 and the partition plate 45. The inlet 422 and the outlet 424 are both communicated with the first fluid cavity 421. The thermostatic expansion valve further includes a temperature sensing bulb 461 and an auxiliary pipeline 463. An auxiliary opening 425 communicated with the second fluid cavity 423 is further provided on the valve core 43. The temperature sensing bulb 461 is disposed on the discharge pipeline 50 communicated with the outlet 424. The auxiliary pipeline 463 is communicated between the temperature sensing bulb 461 and the auxiliary opening 425. In this way, for the force-receiving film 434, it is subjected to the supporting force of the core body 432, the pressure of the refrigerant flowing out from the first fluid cavity 421, and the pressure of the temperature sensing medium entering the second fluid cavity 423. When the refrigerant flow rate at the outlet 424 of the thermostatic expansion valve is the target flow rate, the supporting force F1 of the core body 432, the pressure F2 of the refrigerant in the first fluid cavity 421, and the pressure F3 of the temperature sensing medium in the second fluid cavity 423 received by the force-receiving film 434 are balanced, and the valve core 43 remains stationary. When the refrigerant flow rate at the outlet 424 is greater than the target flow rate, the pressure F2 of the refrigerant in the first fluid cavity 421 received by the force-receiving film 434 is larger, the valve core 43 floats upward, and the flow area decreases, so that the refrigerant flow rate at the outlet 424 gradually decreases to the target flow rate. When the refrigerant fluid at the outlet 424 is less than the target flow rate, the pressure F2 of the refrigerant in the first fluid cavity 421 received by the force-receiving film 434 is smaller, the valve core 43 descends, and the flow area increases, so that the refrigerant flow rate at the outlet 424 gradually increases to the target flow rate.

[0035] Still further, the thermostatic expansion valve further includes an adjusting assembly 47. The adjusting assembly 47 includes an elastic member 473 and an adjusting member 471. The adjusting member 471 is telescopically disposed on the valve body 41 and is located on the side of the core body 432 facing away from the force-receiving film 434. The elastic member 473 abuts between the adjusting member 471 and the core body 432. That is to say, one end of the elastic member 473 is connected to the telescopic adjusting member 471, and the other end of the elastic member 473 is connected to the core body 432. The supporting force received by the core body 432 is the same as the elastic force of the elastic member 473. When the adjusting member 471 moves toward the force-receiving film 434, the elastic member 473 is compressed, and the elastic supporting force received by the core body 432 increases, so that the target flow rate when the valve core 43 is balanced can be reduced. When the adjusting member 471 moves away from the force-receiving film 434, the elastic member 473 is released, and the elastic supporting force received by the core body 432 decreases, so that the target flow rate when the valve core 43 is balanced can be increased. In this way, by telescoping the adjusting member 471, the target flow rate can be changed. Optionally, the adjusting member 471 is threadedly connected to the valve body 41.

[0036] Specifically in this embodiment, the thermostatic expansion valve is an externally equalized thermostatic expansion valve, and the thermostatic expansion valve further includes a balance pipe 48. The balance pipe 48 is connected between the first fluid chamber 421 and the discharge pipeline 50 to collect the refrigerant pressure on the discharge pipeline 50 connected to the outlet 424 of the thermostatic expansion valve to control the thermostatic expansion valve. It can be understood that in some other embodiments, the thermostatic expansion valve can also be an internally equalized thermostatic expansion valve without the balance pipe 48. The specific form of the thermostatic expansion valve is not limited herein.

[0037] In some embodiments, the unloading branch 30 further includes an unloading valve 60. The unloading valve 60 is connected in series with the flow regulating valve 32, and the unloading valve 60 is controlled to open and close the unloading branch 30. In this way, when the air conditioner unit 100 is in an ultra-high temperature environment, the pressure of the refrigerant discharged from the condenser 14 rises to reach the operating pressure of the unloading valve 60. The unloading valve 60 opens the unloading branch 30, and the refrigerant in the air conditioner unit 100 can be unloaded at a target flow rate, preventing the exhaust temperature of the unit from being too high and affecting the reliability, while ensuring the refrigeration capacity of the unit. When the air conditioner unit 100 is not in an ultra-high temperature environment, the pressure of the refrigerant discharged from the condenser 14 drops to less than the operating pressure of the unloading valve 60, the unloading valve 60 will not open, the unloading branch 30 remains closed, and the air conditioner unit 100 does not need to be unloaded.

[0038] It can be understood that the unloading valve 60 can be connected in series on one side of the inlet of the flow regulating valve 32 or on one side of the outlet 424 of the flow regulating valve 32. The specific series connection position of the unloading valve 60 is not limited herein.

[0039] In some embodiments, the working circuit 10 of the air conditioner unit 100 further includes a throttling member 70. The throttling member 70 is connected in series between the condenser 14 and the evaporator 16, and the throttling member 70 is connected in parallel with the flow regulating valve 32. In this way, when the unit is in an ultra-high temperature environment, the refrigerant flowing out of the condenser 14 enters the unloading branch 30 along one path, and enters the evaporator 16 through the throttling member 70 for heat exchange. In this way, the refrigerant entering the evaporator 16 is throttled by the throttle valve.

[0040] In some embodiments, the working circuit 10 of the air conditioner unit 100 further includes a filtering member 80. The filtering member 80 is connected in series between the condenser 14 and the evaporator 16, and the filtering member 80 is connected in series with the flow regulating valve, which is equivalent to the filtering member 80 being connected in series with the unloading branch 30. When the air conditioner unit 100 is in an ultra-high temperature environment, the refrigerant flowing out of the condenser 14 is filtered by the filtering member 80 and then divided into two paths. One path enters the unloading branch 30, and the other path enters the evaporator 16. In this way, the refrigerant flowing out of the condenser 14 is filtered by the filtering member 80 to prevent too many impurities from accumulating in the refrigerant and affecting the heat exchange performance.

[0041] The air conditioner unit 100 includes a unloading branch 30. The unloading branch 30 includes a flow regulating valve 32. The flow regulating valve 32 is used to adjust the refrigerant flow rate at the outlet 424 of the unloading branch 30 to a target flow rate according to the change of the refrigerant flow rate at the inlet of the unloading branch 30. That is, the flow regulating valve 32 is used to control the refrigerant flow rate flowing out of the unloading branch 30 to the target flow rate. The refrigerant flow rate flowing out of the unloading branch 30 is no longer directly affected by the refrigerant flow rate flowing into the unloading branch 30, but is controlled at the target flow rate. This target flow rate is designed in advance to be a relatively reasonable flow rate according to the operating conditions of the air conditioner unit 100, so that the refrigerant flow rate flowing out of the unloading branch 30 is neither too much nor too little. In this way, it can not only ensure the refrigerant flow rate for normal refrigeration work to meet the refrigeration demand, but also reduce the exhaust temperature at the air conditioner condenser 14 by allowing a part of the refrigerant to directly enter the compressor 12 from the condenser 14, thereby improving the reliability of the air conditioner operating in an ultra-high temperature environment. In this way, by controlling the unloading flow rate of the unloading branch 30, it is possible to prevent the refrigeration capacity of the air conditioner unit 100 from decaying too much due to a large unloading amount, and at the same time ensure that the air conditioner can still operate normally in an ultra-high temperature environment, so that the air conditioner unit 100 can balance the refrigeration reliability and refrigeration capacity in an ultra-high temperature environment.

[0042] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0043] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An air conditioning unit, characterized in that, The air conditioner unit includes a working circuit (10) and an unloading branch (30). The working circuit (10) includes a compressor (12), a condenser (14), and an evaporator (16) connected in series. The unloading branch (30) includes a flow regulating valve (32), and the flow regulating valve (32) is connected in parallel with the evaporator (16). Wherein, the flow regulating valve (32) is configured to adjust the refrigerant flow rate at the outlet of the unloading branch (30) to a target flow rate according to the change in the refrigerant flow rate at the outlet of the unloading branch (30); the flow regulating valve (32) is configured such that the target flow rate is adjustable; the flow regulating valve (32) is a thermostatic expansion valve, and the thermostatic expansion valve is an externally equalized thermostatic expansion valve. The thermostatic expansion valve includes a valve body (41), a valve core (43), and a partition plate (45). An accommodation cavity (42) is formed in the valve body (41). An inlet (422) and an outlet (424) that are both communicated with the accommodation cavity (42) are provided on the valve body (41). The partition plate (45) is disposed in the accommodation cavity (42), and a through hole (451) communicating between the inlet (422) and the outlet (424) is provided on the partition plate (45); wherein, the valve core (43) is telescopically disposed in the through hole (451) and changes the flow area between the inner wall of the through hole (451) and the valve core (43). The valve core (43) includes a core body (432) and a force-receiving membrane (434). The valve body (41) movably passes through the through hole (451). The force-receiving membrane (434) is disposed on one side of the core body (432) to divide the accommodation cavity (42) into a first fluid cavity (421) and a second fluid cavity (423). The outlet (424) is located between the force-receiving membrane (434) and the partition plate (45), and both the inlet (422) and the outlet (424) are communicated with the first fluid cavity (421). The thermostatic expansion valve further includes a balance pipe (48), and the balance pipe (48) is communicated between the first fluid cavity (421) and a discharge pipeline (50) communicated with the outlet (424). The working circuit (10) further includes a throttling member (70). The throttling member (70) is connected in series between the condenser (14) and the evaporator (16), and the throttling member (70) is connected in parallel with the flow regulating valve (32).

2. The air conditioner unit according to claim 1, characterized in that, The valve core (43) is configured such that when the flow rate at the outlet (424) of the thermostatic expansion valve is greater than the target flow rate, the valve core (43) extends and retracts to reduce the flow area, and the valve core (43) is configured such that when the flow rate at the outlet (424) of the thermostatic expansion valve is less than the target flow rate, the valve core (43) extends and retracts to increase the flow area.

3. The air conditioner unit according to claim 2, characterized in that, An auxiliary opening (425) communicated with the second fluid cavity (423) is further provided on the valve body (41). The thermostatic expansion valve further includes a thermal bulb (461) and an auxiliary pipeline (463). The thermal bulb (461) is arranged on the discharge pipeline (50), and the auxiliary pipeline (463) is communicated between the thermal bulb (461) and the auxiliary opening (425).

4. The air conditioner unit according to claim 3, characterized in that, The thermostatic expansion valve further includes an adjusting assembly (47). The adjusting assembly (47) includes an adjusting member (471) and an elastic member (473). The adjusting member (471) is telescopically arranged in the valve body (41) and is located on the side of the core body (432) facing away from the force-receiving membrane (434). The elastic member (473) is connected between the adjusting member (471) and the core body (432).

5. The air-conditioning unit according to any one of claims 1-4, characterized in that, The unloading branch (30) further includes an unloading valve (60). The unloading valve (60) is connected in series with the flow regulating valve (32), and the unloading valve (60) is controlled to open or close the unloading branch (30).

6. The air conditioner unit according to any one of claims 1-4, characterized in that, The working circuit (10) further includes a filter element (80). The filter element (80) is connected in series between the condenser (14) and the evaporator (16), and the filter element (80) is connected in series with the flow regulating valve (32).

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