Multi-oil return assembly based on multi-connected air conditioning system

Abstract

The utility model discloses a multi-oil return assembly based on a multi-connected air conditioning system, which comprises an outdoor heat exchanger, an outdoor main electronic expansion valve is mounted on one side of the outdoor heat exchanger, and a compressor structure comprises a chassis mounted on one side of a multi-oil return structure. According to the working principle of the multiple oil return assemblies, when the oil level lacks oil, oil return is conducted through the continuous oil return opening connected with the oil separator in a capillary tube mode, the electromagnetic valve controls the rapid oil return opening of the capillary tube, and the oil return process can be continuously controlled in the air suction process of the compressor; the compressor serves as an important part in the air-conditioning system and bears main power for maintaining the air-conditioning system, and internal components can rub with one another, so that uniform oil return quantity of the compressor is ensured to be crucial, and the multi-oil return assembly based on the multi-connected air-conditioning system solves the problems that the compressor is lack of oil after long-term operation of the air-conditioning system, and the service life of the air-conditioning system is prolonged. And the refrigerating and heating capacities of the air conditioner are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioning system accessories, and in particular to a multi-oil return assembly based on a multi-split air conditioning system. Background Technology

[0002] An air conditioner, or air conditioner, consists of four parts: a refrigeration cycle system, an air circulation and ventilation system, an electrical control system, and a housing. It is a small air conditioning unit that maintains a certain temperature, humidity, airflow speed, cleanliness, and freshness of the air in the regulated space. There are many types of household air conditioners, among which the most common include wall-mounted air conditioners, floor-standing air conditioners, window air conditioners, and ceiling-mounted air conditioners. A multi-oil return component based on a multi-split air conditioning system is required to ensure the stable operation of the system and efficient oil return.

[0003] Current multi-return oil return components based on multi-split air conditioning systems can basically meet people's usage needs, but some problems still exist, as detailed below:

[0004] When an air conditioning system is in use, the compressor may experience oil shortage, which will reduce the air conditioning's cooling and heating capacity and affect the use and operation of the air conditioning system. As an important part of the air conditioning system, the compressor is responsible for maintaining the main power of the air conditioning system. The internal components will rub against each other, so ensuring a uniform oil return to the compressor is crucial. Utility Model Content

[0005] The purpose of this invention is to provide a multi-oil return assembly based on a multi-split air conditioning system to solve the problem of oil shortage in existing compressors.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a multi-oil return assembly based on a multi-split air conditioning system, including an outdoor heat exchanger;

[0007] An outdoor main electronic expansion valve is installed on one side of the outdoor heat exchanger, a compressor module heat sink is installed on one side of the outdoor main electronic expansion valve, and an outdoor auxiliary electronic expansion valve is installed on the side of the compressor module heat sink.

[0008] A plate heat exchanger is installed at the bottom of the outdoor auxiliary electronic expansion valve, a high-pressure shut-off valve is installed on one side of the plate heat exchanger, and an indoor heat exchanger is installed on one side of the high-pressure shut-off valve.

[0009] An indoor electronic expansion valve is installed on one side of the indoor heat exchanger, and a compressor structure is installed at the bottom of the outdoor heat exchanger. The compressor structure includes a chassis installed on one side of the multi-oil return structure.

[0010] When in use, the working principle of the multiple oil return assembly is as follows: when the oil level is low, the oil return port connected to the oil separator uses a capillary tube to return oil and the solenoid valve controls the rapid oil return port of the capillary tube. This allows for uninterrupted control of the oil return process during the compressor's suction process. As an important part of the air conditioning system, the compressor is responsible for maintaining the main power of the air conditioning system. The internal components will rub against each other, so ensuring a uniform oil return volume of the compressor is crucial.

[0011] Furthermore, a housing is installed at the top of the chassis, and an oil separator connection port is installed at the top of the housing. A first quick return oil connection pipe is installed at one end of the housing. A first filter is installed at the top of the first quick return oil connection pipe. A second quick return oil connection pipe is installed at the top of the first filter. A quick return oil capillary is installed at the bottom of the second quick return oil connection pipe. A third quick return oil connection pipe is installed on one side of the top of the quick return oil capillary. A fourth quick return oil connection pipe is installed on one side of the third quick return oil connection pipe. A first solenoid valve is installed on one side of the fourth quick return oil connection pipe. A second filter is installed on one side of the second quick return oil connection pipe.

[0012] Furthermore, a continuous return capillary tube is installed at the bottom end of the second quick return oil connecting pipe, and the continuous return oil capillary tube is serpentine in shape.

[0013] Furthermore, the chassis has an internal reinforcement structure, which includes a reinforcement layer installed inside the chassis, a first reinforcing rib installed inside the reinforcement layer, a third reinforcing rib installed inside the reinforcement layer, and a second reinforcing rib installed inside the reinforcement layer, which can enhance the structural strength of the chassis.

[0014] Furthermore, the second reinforcing rib and the first reinforcing rib intersect each other, and the second reinforcing rib is arranged at equal intervals inside the reinforcing layer. The reinforcing rib can be made of steel.

[0015] Furthermore, the multi-oil return structure includes an oil separator installed at the bottom of the four-way valve, a continuous oil return port installed at the bottom of the oil separator, and a second solenoid valve installed at the bottom of the continuous oil return port. The continuous oil return port connected through the oil separator uses a capillary tube for oil return, and the solenoid valve controls the rapid oil return port of the capillary tube, which can continuously control the oil return process during the compressor's suction process.

[0016] Furthermore, a low-pressure shut-off valve is installed on one side of the indoor electronic expansion valve, a gas-liquid separator is installed at the bottom of one side of the low-pressure shut-off valve, a multi-stage oil return structure is installed on one side of the gas-liquid separator, and a four-way valve is installed at the top of the multi-stage oil return structure.

[0017] The multi-oil return component based on a multi-split air conditioning system provided by this utility model has the following advantages: the device can perform multiple oil returns, and can return oil to the compressor while the device operates efficiently, solving the problem of compressor oil shortage during long-term operation of the air conditioning system, which leads to a decrease in the cooling and heating capacity of the air conditioner.

[0018] The air conditioning system comprises components including a compressor, gas-liquid separator, oil separator, four-way valve, indoor and outdoor heat exchangers, indoor and outdoor electronic expansion valves, compressor module cooling, plate heat exchanger, and high and low pressure shut-off valves. During the refrigeration process, the compressor absorbs low-temperature, low-pressure gas from the gas-liquid separator and converts it into high-temperature, high-pressure gas. This gas is then discharged to the oil separator via pipeline. The oil separator is connected to the four-way valve via pipeline. The high-temperature, high-pressure gas is discharged to the outdoor heat exchanger through the four-way reversing valve. During this process, the gas undergoes a phase change, becoming a gas-liquid mixture. This mixture is then throttled by the electronic expansion valve, becoming a low-temperature, low-pressure gas-liquid mixture that enters the compressor module for cooling, reducing the module temperature. The low-temperature, low-pressure liquid then enters the plate heat exchanger for heat exchange, allowing for energy recovery and reuse. The low-temperature, low-pressure gas-liquid mixture from the plate heat exchanger enters the indoor heat exchanger through the high-pressure shut-off valve. During the heating process… The subcooling component opens the electronic expansion valve to allow the gas-liquid mixture to enter the plate heat exchanger for secondary heat exchange. Then, the refrigerant is discharged into the jet enthalpy enhancement component and the liquid injection cooling component through the control of the solenoid valve. This greatly increases the heating capacity and COP in low-temperature conditions. The working principle of the multi-oil return component is that when the oil level is low, oil return is carried out through the continuous oil return port connected to the oil separator using a capillary tube. The solenoid valve controls the rapid oil return port of the capillary tube, which can continuously control the oil return process during the compressor suction process. As an important part of the air conditioning system, the compressor is responsible for maintaining the main power of the air conditioning system. The internal components will rub against each other. Therefore, ensuring a uniform oil return volume of the compressor is crucial. This is how the multi-oil return component based on the multi-split air conditioning system solves the problem of compressor oil shortage during long-term operation of the air conditioning system, which leads to a decrease in the cooling and heating capacity of the air conditioning. Attached Figure Description

[0019] Figure 1 This is a partial three-dimensional structural diagram of the compressor structure of this utility model;

[0020] Figure 2 This is a frontal cross-sectional view of the present invention.

[0021] Figure 3 For the present utility model Figure 2 Enlarged cross-sectional view of point A in the middle section;

[0022] Figure 4 This is a partial cross-sectional view of the reinforcing structure of this utility model.

[0023] Figure 5This is a frontal partial cross-sectional view of the multi-oil return structure of this utility model.

[0024] The following are the annotations in the diagram: 1. Compressor structure; 101. Chassis; 102. Oil separator connection port; 103. First quick oil return connection pipe; 104. First filter; 105. Second quick oil return connection pipe; 106. Quick oil return capillary tube; 107. Third quick oil return connection pipe; 108. Fourth quick oil return connection pipe; 109. First solenoid valve; 110. Second filter; 111. Continuous oil return capillary tube; 112. Outer shell; 2. Gas-liquid separator; 3. Multiple oil return structure; 301. Oil separator; 302. Continuous oil return port; 303. Second solenoid valve; 4. Four-way valve; 5. Outdoor heat exchanger; 6. Outdoor main electronic expansion valve; 7. Compressor module heat dissipation; 8. Plate heat exchanger; 9. Outdoor auxiliary electronic expansion valve; 10. High-pressure shut-off valve; 11. Indoor heat exchanger; 12. Indoor electronic expansion valve; 13. Low-pressure shut-off valve; 14. Reinforcing structure; 1401. First reinforcing rib; 1402. Second reinforcing rib; 1403. Third reinforcing rib; 1404. Reinforcing layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 One embodiment of this utility model is a multi-oil return assembly based on a multi-split air conditioning system, including an outdoor heat exchanger 5.

[0027] An outdoor main electronic expansion valve 6 is installed on one side of the outdoor heat exchanger 5, a compressor module heat sink 7 is installed on one side of the outdoor main electronic expansion valve 6, and an outdoor auxiliary electronic expansion valve 9 is installed on one side of the compressor module heat sink 7.

[0028] A plate heat exchanger 8 is installed at the bottom of the outdoor auxiliary electronic expansion valve 9, a high-pressure shut-off valve 10 is installed on one side of the plate heat exchanger 8, and an indoor heat exchanger 11 is installed on one side of the high-pressure shut-off valve 10.

[0029] An indoor electronic expansion valve 12 is installed on one side of the indoor heat exchanger 11. A low-pressure shut-off valve 13 is installed on one side of the indoor electronic expansion valve 12. A gas-liquid separator 2 is installed at the bottom of one side of the low-pressure shut-off valve 13. A multi-stage oil return structure 3 is installed on one side of the gas-liquid separator 2. The multi-stage oil return structure 3 includes an oil separator 301 installed at the bottom of the four-way valve 4. A continuous oil return port 302 is installed at the bottom of the oil separator 301. A second solenoid valve 303 is installed at the bottom of the continuous oil return port 302.

[0030] See attached document Figure 1 and attached Figure 5 As shown, the working principle of the multi-oil return assembly is as follows: when the oil level is low, the oil return port 302 connected to the oil separator 301 uses the capillary shape of the fast oil return capillary 106 and the continuous oil return capillary 111 to return oil. The second solenoid valve 303 controls the fast oil return port of the capillary, which can continuously control the oil return process during the compressor's suction process. As an important part of the air conditioning system, the compressor is responsible for maintaining the main power of the air conditioning system. The internal components will rub against each other, so ensuring a uniform oil return volume of the compressor is crucial.

[0031] A four-way valve 4 is installed at the top of the multi-oil return structure 3, and a compressor structure 1 is installed at the bottom of the outdoor heat exchanger 5. The compressor structure 1 includes a chassis 101 installed on one side of the multi-oil return structure 3. A reinforcing structure 14 is installed inside the chassis 101. The reinforcing structure 14 includes a reinforcing layer 1404 installed inside the chassis 101. A first reinforcing rib 1401 is installed inside the reinforcing layer 1404. A third reinforcing rib 1403 is installed inside the reinforcing layer 1404. A second reinforcing rib 1402 is installed inside the reinforcing layer 1404. The second reinforcing rib 1402 and the first reinforcing rib 1401 intersect each other. The second reinforcing rib 1402 is arranged at equal intervals inside the reinforcing layer 1404.

[0032] See attached document Figure 4 As shown, the reinforcing layer 1404 is provided with a first reinforcing rib 1401, a second reinforcing rib 1402 and a third reinforcing rib 1403 arranged at equal intervals. The first reinforcing rib 1401 and the second reinforcing rib 1402 intersect each other. The first reinforcing rib 1401, the second reinforcing rib 1402 and the third reinforcing rib 1403 can be made of steel. The first reinforcing rib 1401, the second reinforcing rib 1402 and the third reinforcing rib 1403 can strengthen the structural strength of the chassis 101 and prevent the chassis 101 from being damaged.

[0033] A housing 112 is installed at the top of the chassis 101. An oil separator connection port 102 is installed at the top of the housing 112. A first quick return oil connection pipe 103 is installed at one end of the housing 112. A first filter 104 is installed at the top of the first quick return oil connection pipe 103. A second quick return oil connection pipe 105 is installed at the top of the first filter 104. A continuous return oil capillary 111 is installed at the bottom of the second quick return oil connection pipe 105. The continuous return oil capillary 111 is serpentine in shape.

[0034] A quick return oil capillary tube 106 is installed at the bottom end of the second quick return oil connecting pipe 105. A third quick return oil connecting pipe 107 is installed on one side of the top end of the quick return oil capillary tube 106. A fourth quick return oil connecting pipe 108 is installed on one side of the third quick return oil connecting pipe 107. A first solenoid valve 109 is installed on one side of the fourth quick return oil connecting pipe 108. A second filter 110 is installed on one side of the second quick return oil connecting pipe 105.

[0035] See attached document Figure 1-2 As shown, the air conditioning system components include a compressor, a gas-liquid separator 2, an oil separator 301, a four-way valve 4, indoor and outdoor heat exchangers, indoor and outdoor electronic expansion valves, a compressor module heat sink 7, a plate heat exchanger 8, a high-pressure shut-off valve 10, and a low-pressure shut-off valve 13. During the refrigeration process, the compressor absorbs the low-temperature, low-pressure gas from the gas-liquid separator 2 and converts it into high-temperature, high-pressure gas. This gas is then discharged to the oil separator 301 through a pipeline. The oil separator 301 is connected to the four-way valve 4 through a pipeline. The high-temperature, high-pressure gas is then discharged to the outdoor heat exchanger 5 through the four-way reversing valve, where it undergoes a phase change process. The liquid mixture is throttled by an electronic expansion valve, becoming a low-temperature, low-pressure gas-liquid mixture that enters the compressor module for heat dissipation 7, reducing the module temperature. The low-temperature, low-pressure liquid enters the plate heat exchanger 8 for heat exchange, allowing for energy recovery and reuse. The low-temperature, low-pressure gas-liquid mixture exiting the plate heat exchanger enters the indoor side for heat exchange through a high-pressure shut-off valve 10. During the heating process, the subcooling component opens the electronic expansion valve to allow the gas-liquid mixture to enter the plate heat exchanger for secondary heat exchange. Then, the refrigerant is discharged into the jet enthalpy enhancement component and the liquid injection cooling component under the control of a solenoid valve, greatly increasing the heating capacity and COP in low-temperature conditions.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multiple oil return assembly based on a multi-connected air conditioning system, comprising an outdoor side heat exchanger (5); characterized in that: One side of the outdoor side heat exchanger (5) is provided with an outdoor side main electronic expansion valve (6), one side of the outdoor side main electronic expansion valve (6) is provided with a compressor module heat sink (7), one side of the compressor module heat sink (7) is provided with an outdoor side auxiliary electronic expansion valve (9); The bottom end of the outdoor side auxiliary electronic expansion valve (9) is provided with a plate heat exchanger (8), one side of the plate heat exchanger (8) is provided with a high-pressure stop valve (10), one side of the high-pressure stop valve (10) is provided with an indoor side heat exchanger (11); One side of the indoor side heat exchanger (11) is provided with an indoor side electronic expansion valve (12), the bottom end of the outdoor side heat exchanger (5) is provided with a compressor structure (1), the compressor structure (1) comprises a chassis (101) installed on one side of a multiple oil return structure (3).

2. The multi-recovery oil assembly based on a multi-connected air conditioning system according to claim 1, characterized in that: The top end of the chassis (101) is provided with a shell (112), the top end of the shell (112) is provided with an oil separator connection port (102), one end of the shell (112) is provided with a first quick oil return connection pipe (103), the top end of the first quick oil return connection pipe (103) is provided with a first filter (104), the top end of the first filter (104) is provided with a second quick oil return connection pipe (105), the bottom end of the second quick oil return connection pipe (105) is provided with a quick oil return capillary (106), one side of the top end of the quick oil return capillary (106) is provided with a third quick oil return connection pipe (107), the third quick oil return connection pipe (107), one side of the third quick oil return connection pipe (107) is provided with a fourth quick oil return connection pipe (108), one side of the fourth quick oil return connection pipe (108) is provided with a first electromagnetic valve (109), one side of the second quick oil return connection pipe (105) is provided with a second filter (110).

3. The multi-recovery oil assembly based on a multi-connected air conditioning system according to claim 2, characterized in that: The bottom end of the second quick oil return connection pipe (105) is provided with a continuous oil return capillary (111), and the continuous oil return capillary (111) is in a serpentine shape.

4. The multi-recovery oil assembly based on a multi-connected air conditioning system according to claim 1, characterized in that: The inside of the chassis (101) is provided with a reinforcing structure (14), the reinforcing structure (14) comprises a reinforcing layer (1404) installed in the inside of the chassis (101), the inside of the reinforcing layer (1404) is provided with a first reinforcing rib (1401), the inside of the reinforcing layer (1404) is provided with a third reinforcing rib (1403), and the inside of the reinforcing layer (1404) is provided with a second reinforcing rib (1402).

5. The multi-recovery oil assembly based on a multi-connected air conditioning system according to claim 4, characterized in that: The second reinforcing rib (1402) and the first reinforcing rib (1401) intersect with each other, and the second reinforcing rib (1402) is arranged at equal intervals in the inside of the reinforcing layer (1404).

6. The multi-recovery oil assembly based on a multi-connected air conditioning system according to claim 1, characterized in that: One side of the indoor side electronic expansion valve (12) is provided with a low pressure stop valve (13), the bottom end of one side of the low pressure stop valve (13) is provided with a gas-liquid separator (2), one side of the gas-liquid separator (2) is provided with a multiple oil return structure (3), and the top end of the multiple oil return structure (3) is provided with a four-way valve (4).

7. The multi-recovery oil assembly based on a multi-connected air conditioning system according to claim 6, characterized in that: The multiple oil return structure (3) comprises an oil separator (301) installed at the bottom end of the four-way valve (4), and the bottom end of the oil separator (301) is provided with a continuous oil return port (302), and the bottom end of the continuous oil return port (302) is provided with a second electromagnetic valve (303).

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