Air conditioner capable of quickly balancing pressure after shutdown

Abstract

The utility model provides an air conditioner capable of quickly balancing pressure after shutdown, which comprises an outdoor unit and an indoor unit which are communicated, and is characterized in that the outdoor unit comprises a chassis, and an outdoor unit heat exchanger, a gas-liquid separator, a compressor and a four-way valve which are arranged on the chassis, the outdoor unit heat exchanger is installed along the peripheral side of the chassis, the outlet end of the outdoor unit heat exchanger is connected with a first pipeline and a second pipeline, the first pipeline is connected with an electromagnetic valve, the electromagnetic valve is communicated with the gas-liquid separator, the inlet end of the outdoor unit heat exchanger, the gas-liquid separator and the compressor are communicated with the four-way valve, and the compressor is communicated with the four-way valve. The second pipeline is used for being communicated with an indoor unit, and a thermostatic expansion valve is installed in the indoor unit. The air conditioner balancing device has the advantage that squeal noise is prevented from being generated when the air conditioner is balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioner capable of quickly balancing pressure after shutdown. Background Art

[0002] Thermal expansion valves have the advantages of high reliability, long life, low maintenance cost and low energy consumption, and are widely used in various refrigeration systems. The thermal expansion valve adjusts the refrigerant flow rate according to the refrigerant superheat at the evaporator outlet. That is, when the evaporator outlet superheat is high, the aperture of the thermal expansion valve will be opened to increase the refrigerant flow rate. When the evaporator outlet superheat is too small, the aperture of the thermal expansion valve will be reduced to reduce the refrigerant flow rate, and gradually closed to the minimum opening or closed. Therefore, in the refrigeration system using thermal expansion valves, after the unit is shut down, the pressure difference between the high and low pressure sides may not be balanced for a long time, and the compressor may fail to start or noise may occur when it is restarted. The industry generally uses exhaust bypass to quickly balance the pressure after the unit is shut down. The exhaust bypass is generally set on the exhaust side of the compressor, but due to the fast gas flow rate on the exhaust side, it is easy to generate whistling noise during balancing. Utility Model Content

[0003] In view of this, the utility model provides an air conditioner that can quickly balance pressure after shutdown, so as to solve or alleviate the technical problem of easily generating whistling noise in the prior art, and at least provide a beneficial choice.

[0004] The technical solution of the embodiment of the utility model is achieved as follows: an air conditioner that quickly balances pressure after shutdown, comprising an outdoor unit and an indoor unit, the outdoor unit being connected to the indoor unit, the outdoor unit comprising a chassis and an outdoor unit heat exchanger, a gas-liquid separator, a compressor and a four-way valve installed on the chassis, the outdoor unit heat exchanger being installed along the circumference of the chassis, the outlet end of the outdoor unit heat exchanger being connected to a first pipe and a second pipe, the first pipe being connected to a solenoid valve, the solenoid valve being connected to the gas-liquid separator, the inlet end of the outdoor unit heat exchanger, the gas-liquid separator and the compressor being connected to the four-way valve, the second pipe being used to connect to the indoor unit, and a thermal expansion valve being installed in the indoor unit.

[0005] In the above scheme, the first pipe connected to the outlet end of the outdoor unit heat exchanger is connected to the solenoid valve, and the solenoid valve is connected to the gas-liquid separator. The first pipe here is a bypass loop to avoid the situation where the pressure difference between the high and low pressure sides may not be balanced for a long time after the unit is shut down. The bypass loop is located at the outlet end of the outdoor unit heat exchanger. The refrigerant is highly supercooled and has a low flow rate. It is not easy to generate whistling noise. When the air conditioner is working, the liquid refrigerant generated by the outdoor unit heat exchanger enters the indoor unit through the second pipe, and the low-temperature steam generated by the indoor unit flows into the gas-liquid separator of the outdoor unit. The gas-liquid separator separates the gaseous and liquid refrigerants. The gaseous refrigerant enters the compressor to be compressed into high-pressure gas, and the high-pressure gas enters the outdoor unit heat exchanger to be condensed into liquid refrigerant.

[0006] Further: the outdoor unit heat exchanger includes a liquid separator, a liquid separator capillary, a heat exchanger flow path and an air collecting pipe, the air collecting pipe is connected to multiple heat exchanger flow paths, multiple heat exchanger flow paths are connected to multiple liquid separator capillaries, and multiple liquid separator capillaries are connected to the liquid separator.

[0007] In the above scheme, the gas collecting pipe can collect the gas from the compressor and evenly distribute the refrigerant to each heat exchanger flow path through the liquid separation capillary, which can improve the heat exchange efficiency. Because each heat exchanger flow path can operate under the same conditions, the uniform refrigerant distribution helps to improve the COP (coefficient of performance) of the entire refrigeration system, thereby improving energy efficiency.

[0008] Further: the second pipeline is connected to the outdoor unit liquid pipe stop valve, the outdoor unit liquid pipe stop valve is connected to the third pipeline, the third pipeline is connected to the indoor unit liquid pipe stop valve, the indoor unit liquid pipe stop valve is connected to the fourth pipeline, and the fourth pipeline is connected to the thermal expansion valve.

[0009] In the above scheme, the outdoor unit liquid pipe stop valve and the indoor unit liquid pipe stop valve provide precise control of the refrigerant flow, allowing the amount of refrigerant flowing to the indoor unit to be cut off or adjusted when necessary. At the same time, the outdoor unit liquid pipe stop valve and the indoor unit liquid pipe stop valve can be closed when abnormal system pressure is detected to prevent refrigerant leakage and improve the safety of the system.

[0010] Further: the indoor unit includes an indoor unit heat exchanger, and the thermal expansion valve is connected to the indoor unit heat exchanger.

[0011] In the above scheme, the thermal expansion valve can accurately adjust the refrigerant flow rate according to the refrigerant superheat at the outlet of the indoor unit heat exchanger, thereby achieving precise control of the indoor temperature. By precisely controlling the refrigerant flow rate, excessive or insufficient refrigerant flow can be avoided, thereby improving the energy efficiency ratio of the air-conditioning system.

[0012] Further: the indoor unit heat exchanger is connected to a fifth pipeline, the fifth pipeline is connected to an indoor unit gas pipe stop valve, the indoor unit gas pipe stop valve is connected to a sixth pipeline, the sixth pipeline is connected to an outdoor unit gas pipe stop valve, and the outdoor unit gas pipe stop valve is connected to the four-way valve.

[0013] In the above scheme, the indoor unit gas pipe stop valve and the outdoor unit gas pipe stop valve can control and adjust the pressure of the refrigerant gas to ensure that the system operates within a safe and optimal working range. The outdoor unit gas pipe stop valve is connected to the four-way valve to realize the connection between the indoor unit and the outdoor unit.

[0014] Further: the four-way valve includes a first joint, a second joint, a third joint and a fourth joint, the first joint is connected to the inlet end of the indoor unit heat exchanger and the first joint, the gas-liquid separator is connected to the second joint, the compressor is connected to the third joint, and the outdoor unit stop valve is connected to the fourth joint.

[0015] In the above solution, the design of the four-way valve allows the refrigerant to flow through multiple paths in the system, realizing the conversion of cooling and heating modes. The integrated design of the four-way valve simplifies the system piping, reduces the connection points, and simplifies installation and maintenance.

[0016] Further: the compressor and the gas-liquid separator are connected through a seventh pipeline.

[0017] In the above scheme, the gas-liquid separator can effectively separate the gas and liquid refrigerant, and transport the separated gas to the compressor through the seventh pipeline, which helps to maintain the stable operation of the compressor; directly connecting the compressor and the gas-liquid separator through the seventh pipeline simplifies the system piping and reduces the connection points, thereby reducing the system complexity and potential leakage risks.

[0018] Furthermore: it also includes a shell, which is arranged around the outer periphery of the outdoor unit heat exchanger.

[0019] In the above solution, the housing provides physical protection for the outdoor unit heat exchanger to prevent external factors such as dust, moisture, corrosive substances, etc. from damaging the heat exchanger.

[0020] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0021] The utility model has the beneficial effects of being able to quickly balance pressure and avoiding noise. The first pipeline connected to the outlet end of the outdoor unit heat exchanger is connected to the solenoid valve, and the solenoid valve is connected to the gas-liquid separator. The first pipeline here is a bypass loop to avoid the situation that the pressure difference between the high and low pressure sides may not be balanced for a long time after the unit is shut down. The bypass loop is located at the outlet end of the outdoor unit heat exchanger. The refrigerant has a large degree of supercooling and is liquid. The liquid refrigerant has a low flow rate and is not easy to generate whistling noise.

[0022] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 The overall principle diagram of an air conditioner for quickly balancing pressure after shutdown in one embodiment.

[0025] Figure 2 It is a simple schematic diagram of an outdoor unit heat exchanger in one embodiment.

[0026] Figure 3 FIG. 1 is a schematic diagram of a partial structure of an outdoor unit in an embodiment.

[0027] 10. The numerals in the drawings are as follows: 100, outdoor unit; 101, liquid pipe stop valve of outdoor unit; 102, gas pipe stop valve of outdoor unit; 103, solenoid valve; 104, gas-liquid separator; 105, compressor; 106, four-way valve; 1061, first joint; 1062, second joint; 1063, third joint; 1064, fourth joint; 107, chassis; 108, housing; 200, outdoor unit heat exchanger; 201, liquid distributor; 202, liquid distributor capillary; 203, heat exchanger flow path; 204, gas collecting pipe; 300, indoor unit; 301, liquid pipe stop valve of indoor unit; 302, gas pipe stop valve of indoor unit; 303, thermal expansion valve; 304, indoor unit heat exchanger; 1, first pipeline; 2, second pipeline; 3, third pipeline; 4, fourth pipeline; 5, fifth pipeline; 6, sixth pipeline; 7, seventh pipeline. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0029] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 3 As shown, the technical solution of the embodiment of the utility model is implemented as follows: an air conditioner with rapid pressure balance after shutdown, comprising an outdoor unit 100 and an indoor unit 300, the outdoor unit 100 is connected to the indoor unit 300, the outdoor unit 100 comprises a chassis 107 and an outdoor unit heat exchanger 200, a gas-liquid separator 104, a compressor 105 and a four-way valve 106 installed on the chassis 107, the outdoor unit heat exchanger 200 is installed along the circumference of the chassis 107, the outlet end of the outdoor unit heat exchanger 200 is connected to a first pipe 1 and a second pipe 2, the first pipe 1 is connected to a solenoid valve 103, the solenoid valve 103 is connected to the gas-liquid separator 104, the inlet end of the outdoor unit heat exchanger 200, the gas-liquid separator 104 and the compressor 105 are connected to the four-way valve 106, the second pipe 2 is used to connect to the indoor unit 300, and a thermal expansion valve 303 is installed in the indoor unit 300.

[0031] In the above embodiment, the first pipe 1 connected to the outlet end of the outdoor unit heat exchanger 200 is connected to the solenoid valve 103, and the solenoid valve 103 is connected to the gas-liquid separator 104. The first pipe 1 here is a bypass loop to avoid the situation where the pressure difference between the high and low pressure sides may not be balanced for a long time after the unit is shut down. The bypass loop is located at the outlet end of the outdoor unit heat exchanger 200. The refrigerant is highly supercooled and has a low flow rate. It is not easy to generate whistling noise. When the air conditioner is working, the liquid refrigerant generated by the outdoor unit heat exchanger 200 enters the indoor unit 300 through the second pipe 2, and the low-temperature steam generated by the indoor unit 300 flows into the gas-liquid separator 104 of the outdoor unit 100. The gas-liquid separator 104 separates the gaseous and liquid refrigerants. The gaseous refrigerant enters the compressor 105 to be compressed into high-pressure gas, and the high-pressure gas enters the outdoor unit heat exchanger 200 to condense into liquid refrigerant.

[0032] like Figure 1 and Figure 2As shown, in some embodiments, the outdoor unit heat exchanger 200 includes a liquid separator 201, a liquid separator capillary 202, a heat exchanger flow path 203 and a gas collector 204, the gas collector 204 is in communication with a plurality of heat exchanger flow paths 203, the plurality of heat exchanger flow paths 203 are in communication with a plurality of liquid separator capillary 202, and the plurality of liquid separator capillary 202 is in communication with the liquid separator 201. The gas collector 204 can collect gas from the compressor 105, and evenly distribute the refrigerant to each heat exchanger flow path 203 through the liquid separator capillary 202, which can improve the heat exchange efficiency, because each heat exchanger flow path 203 can work under the same conditions, and the even refrigerant distribution helps to improve the COP (coefficient of performance) of the entire refrigeration system, thereby improving energy efficiency.

[0033] like Figure 1 and Figure 3 As shown, in some embodiments, the second pipe 2 is connected to the outdoor unit 100 liquid pipe stop valve 101, the outdoor unit 100 liquid pipe stop valve 101 is connected to the third pipe 3, the third pipe 3 is connected to the indoor unit liquid pipe stop valve 301, the indoor unit liquid pipe stop valve 301 is connected to the fourth pipe 4, and the fourth pipe 4 is connected to the thermal expansion valve 303. The outdoor unit 100 liquid pipe stop valve 101 and the indoor unit liquid pipe stop valve 301 provide precise control of the flow of refrigerant, allowing the amount of refrigerant flowing to the indoor unit 300 to be cut off or adjusted when necessary, and the outdoor unit 100 liquid pipe stop valve 101 and the indoor unit liquid pipe stop valve 301 can be closed when abnormal system pressure is detected to prevent refrigerant leakage and improve the safety of the system.

[0034] like Figure 1 As shown, in some embodiments, the indoor unit 300 includes an indoor unit heat exchanger 304, and the thermal expansion valve 303 is connected to the indoor unit heat exchanger 304. The thermal expansion valve 303 can accurately adjust the refrigerant flow rate according to the refrigerant superheat at the outlet of the indoor unit heat exchanger 304, thereby achieving accurate control of the indoor temperature, and by accurately controlling the refrigerant flow rate, avoiding excessive or insufficient refrigerant flow, the energy efficiency ratio of the air conditioning system is improved.

[0035] like Figure 1 and Figure 3 As shown, in some embodiments, the indoor unit heat exchanger 304 is connected to the fifth pipeline 5, the fifth pipeline 5 is connected to the indoor unit gas pipe stop valve 302, the indoor unit gas pipe stop valve 302 is connected to the sixth pipeline 6, the sixth pipeline 6 is connected to the outdoor unit 100 gas pipe stop valve 102, and the outdoor unit 100 gas pipe stop valve 102 is connected to the four-way valve 106. The indoor unit gas pipe stop valve 302 and the outdoor unit 100 gas pipe stop valve 102 can control and adjust the pressure of the refrigerant gas to ensure that the system operates within a safe and optimal working range, and the outdoor unit 100 gas pipe stop valve 102 is connected to the four-way valve 106 to achieve the connection between the indoor unit 300 and the outdoor unit 100.

[0036] like Figure 1 and Figure 3 As shown, in some embodiments, the four-way valve 106 includes a first joint 1061, a second joint 1062, a third joint 1063 and a fourth joint 1064. The first joint 1061 is connected to the inlet end of the indoor unit heat exchanger 304 with the first joint 1061, the gas-liquid separator 104 is connected to the second joint 1062, the compressor 105 is connected to the third joint 1063, and the stop valve of the outdoor unit 100 is connected to the fourth joint 1064. The design of the four-way valve 106 allows the refrigerant to flow in multiple paths in the system to achieve the conversion of the cooling and heating modes. The integrated design of the four-way valve 106 simplifies the system piping, reduces the connection points, and simplifies the installation and maintenance work.

[0037] like Figure 1 and Figure 3 As shown, in some embodiments, the compressor 105 and the gas-liquid separator 104 are connected through the seventh pipeline 7. The gas-liquid separator 104 can effectively separate the gas and liquid refrigerant, and transport the separated gas to the compressor 105 through the seventh pipeline 7, which helps to maintain the stable operation of the compressor 105; the compressor 105 and the gas-liquid separator 104 are directly connected through the seventh pipeline 7, which simplifies the system pipeline and reduces the connection points, thereby reducing the system complexity and potential leakage risks.

[0038] like Figure 3 As shown, in some embodiments, a housing 200 is further included, and the housing 200 is disposed around the periphery of the outdoor heat exchanger 200. The housing 200 provides physical protection for the outdoor heat exchanger 200 to prevent external factors such as dust, moisture, corrosive substances, etc. from damaging the heat exchanger.

[0039] The utility model discloses an air conditioner with a quick pressure balance after shutdown. The working principle and process are as follows: when the air conditioner is working, the liquid refrigerant generated by the outdoor unit heat exchanger 200 enters the indoor unit 300 through the second pipe 2, and the low-temperature steam generated by the indoor unit 300 flows into the gas-liquid separator 104 of the outdoor unit 100. The gas-liquid separator 104 separates the gaseous and liquid refrigerants. The gaseous refrigerant enters the compressor 105 to be compressed into high-pressure gas. The high-pressure gas enters the outdoor unit heat exchanger 200 to be condensed into liquid refrigerant.

[0040] The second pipeline 2 is connected to the outdoor unit 100 liquid pipe stop valve 101, the outdoor unit 100 liquid pipe stop valve 101 is connected to the third pipeline 3, the third pipeline 3 is connected to the indoor unit liquid pipe stop valve 301, the indoor unit liquid pipe stop valve 301 is connected to the fourth pipeline 4, the fourth pipeline 4 is connected to the thermal expansion valve 303, the thermal expansion valve 303 can adjust the refrigerant flow according to the superheat of the refrigerant at the outlet of the indoor unit heat exchanger 304, and the first pipeline 1 connected to the outlet end of the outdoor unit heat exchanger 200 is connected to the solenoid valve 103, and the solenoid valve 103 is connected to the gas-liquid separator 104, so as to avoid the situation that the pressure difference between the high and low pressure sides may not be balanced for a long time after the unit is shut down. The first pipeline 1 is located at the outlet end of the outdoor unit heat exchanger 200, the refrigerant supercooling is large and the liquid refrigerant flow rate is low, and it is not easy to generate whistling noise.

[0041] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An air conditioner capable of quickly balancing pressure after shutdown, comprising an outdoor unit (100) and an indoor unit (300), wherein the outdoor unit (100) is connected to the indoor unit (300), and characterized in that: The outdoor unit (100) comprises a chassis (107), and an outdoor unit heat exchanger (200), a gas-liquid separator (104), a compressor (105), and a four-way valve (106) installed on the chassis (107). The outdoor unit heat exchanger (200) is installed along the circumference of the chassis (107). The outlet end of the outdoor unit heat exchanger (200) is connected to a first pipe (1) and a second pipe (2). The first pipe (1) is connected to a solenoid valve (103). The solenoid valve (103) is in communication with the gas-liquid separator (104). The inlet end of the outdoor unit heat exchanger (200), the gas-liquid separator (104), and the compressor (105) are in communication with the four-way valve (106). The second pipe (2) is used to connect to an indoor unit (300). A thermal expansion valve (303) is installed in the indoor unit (300).

2. The air conditioner with rapid pressure balance after shutdown according to claim 1, characterized in that: The outdoor unit heat exchanger (200) comprises a liquid separator (201), a liquid separator capillary (202), a heat exchanger flow path (203) and an air collecting pipe (204); the air collecting pipe (204) is connected to a plurality of the heat exchanger flow paths (203); a plurality of the heat exchanger flow paths (203) are connected to a plurality of the liquid separator capillary (202); and a plurality of the liquid separator capillary (202) are connected to the liquid separator (201).

3. The air conditioner with rapid pressure balance after shutdown according to claim 1, characterized in that: The second pipeline (2) is connected to an outdoor unit liquid pipe stop valve (101), the outdoor unit liquid pipe stop valve (101) is connected to a third pipeline (3), the third pipeline (3) is connected to an indoor unit liquid pipe stop valve (301), the indoor unit liquid pipe stop valve (301) is connected to a fourth pipeline (4), and the fourth pipeline (4) is connected to the thermal expansion valve (303).

4. The air conditioner with rapid pressure balance after shutdown according to claim 3, characterized in that: The indoor unit (300) includes an indoor unit heat exchanger (304), and the thermal expansion valve (303) is in communication with the indoor unit heat exchanger (304).

5. An air conditioner capable of quickly balancing pressure after shutdown according to claim 4, characterized in that: The indoor unit heat exchanger (304) is connected to a fifth pipeline (5), the fifth pipeline (5) is connected to an indoor unit gas pipe stop valve (302), the indoor unit gas pipe stop valve (302) is connected to a sixth pipeline (6), the sixth pipeline (6) is connected to an outdoor unit gas pipe stop valve (102), and the outdoor unit gas pipe stop valve (102) is in communication with the four-way valve (106).

6. An air conditioner capable of quickly balancing pressure after shutdown according to claim 5, characterized in that: The four-way valve (106) comprises a first joint (1061), a second joint (1062), a third joint (1063) and a fourth joint (1064); the first joint (1061) is connected to the inlet end of the indoor unit heat exchanger (304) and the first joint (1061); the gas-liquid separator (104) is connected to the second joint (1062); the compressor (105) is connected to the third joint (1063); and the stop valve of the outdoor unit (100) is connected to the fourth joint (1064).

7. The air conditioner with rapid pressure balance after shutdown according to claim 1, characterized in that: The compressor (105) and the gas-liquid separator (104) are connected via a seventh pipeline (7).

8. The air conditioner with rapid pressure balance after shutdown according to claim 1, characterized in that: It also includes a housing (108), wherein the housing (108) is disposed around the outer periphery of the outdoor heat exchanger (200).

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