Liquid separator, compressor and air conditioning system

Abstract

The utility model belongs to the technical field of compressors, and particularly relates to a liquid separator, a compressor and an air conditioning system. The liquid separator comprises a barrel, and an air inlet pipe used for being connected with an air conditioner system pipeline and an air outlet pipe used for being connected with a compressor pump body are arranged on the barrel. One end of the communicating pipe is communicated with the air outlet pipe, and the other end of the communicating pipe is positioned below the air inlet pipe; one end of the oil return pipe is connected with the oil return hole in the communicating pipe, and the other end of the oil return pipe extends into the cylinder body; during use, the pressure in the cylinder body is larger than the pressure at the joint of the oil return pipe and the communicating pipe. According to the utility model, the resistance and the flow loss of a refrigerant mixture in the suction process can be reduced, the blockage of the oil return hole can be avoided, and the suction efficiency and the oil return effect of the compressor can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and in particular relates to a liquid distributor, a compressor and an air-conditioning system. Background Art

[0002] The liquid separator is a crucial component in the operation of compressors and air conditioning systems. Typically installed between the evaporator and the compressor suction line, it separates the liquid and gaseous components of the refrigerant mixture exiting the evaporator. The separated liquid refrigerant is then directed back to the low-pressure side of the air conditioning system or, after appropriate treatment, re-evaporated in the evaporator. The gaseous refrigerant then enters the compressor to continue the compression cycle. The separator improves system reliability and efficiency, extending the life of the compressor.

[0003] In recent years, with the continuous development of refrigeration and air-conditioning equipment technology, compressor performance requirements have become increasingly stringent. Improving refrigeration efficiency and reducing energy consumption have become key research and development priorities. In traditional compressor designs, the liquid distributor typically utilizes a straight steel pipe with a constant cross-section, with the oil return hole located within this pipe. However, in practice, this design often results in low suction flow rates, metal impurities easily clogging the oil return hole, and the refrigerant oil, affected by temperature, condenses into a gel-like substance in the oil return hole, which blocks the hole and thus affects the suction efficiency and overall performance of the compressor.

[0004] To overcome this problem, this application proposes a liquid distributor, compressor, and air conditioning system with a variable-cross-section oil return pipe. By introducing a variable-cross-section straight pipe structure into the liquid distributor, it effectively increases the suction flow rate, reduces airflow losses, and improves the compressor's oil return, thereby increasing the compressor's suction efficiency and, in turn, enhancing the performance of the entire air conditioning system. This application not only optimizes the compressor's operating status but also achieves significant energy savings, in line with current industry trends toward energy conservation and emission reduction. Utility Model Content

[0005] The present utility model aims to address the problem that, in conventional compressor designs, a liquid distributor typically utilizes a straight steel pipe structure with a constant cross-section, and an oil return hole is provided in this straight steel pipe. However, in practical applications, this design often results in low suction flow rate, metal impurities easily clogging the oil return hole, and the refrigerant oil condenses into a gel-like substance in the oil return hole due to temperature, thereby affecting the suction efficiency and overall performance of the compressor. The present utility model provides a liquid distributor, a compressor, and an air conditioning system.

[0006] On the one hand, the utility model provides a liquid distributor, comprising a cylinder, on which an air inlet pipe for connecting to an air conditioning system pipeline and an air outlet pipe for connecting to a compressor pump body are provided;

[0007] It also includes an oil return pipe and a connecting pipe, one end of the connecting pipe is connected to the air outlet pipe, and the other end is located below the air inlet pipe; one end of the oil return pipe is connected to the oil return hole on the connecting pipe, and the other end extends into the cylinder;

[0008] When in use, the pressure in the cylinder is greater than the pressure at the connection between the oil return pipe and the connecting pipe.

[0009] When in use, the liquid separator provided in this application is connected to the air conditioning system pipeline via the air inlet pipe and to the compressor pump body via the air outlet pipe. The liquid separator provided in this application can prevent liquid refrigerant in the refrigeration system of the air conditioning system from entering the compressor, thereby improving the reliability and efficiency of the air conditioning system and extending the service life of the compressor.

[0010] During use, the end of the connecting pipe is lower than the bottom of the intake pipe, with a certain distance between the two to prevent the refrigerant mixture from directly entering the connecting pipe, thereby achieving a preliminary separation of the liquid, gaseous, and impurities in the refrigerant mixture. As the inhaled refrigerant mixture flows through the connecting pipe, the pressure inside the cylinder is greater than the pressure at the connection point between the return oil pipe and the connecting pipe. Due to the pressure difference, the refrigerant mixture is drawn into the connecting pipe through the return oil pipe. Under the influence of gravity, the metal impurities in the refrigerant mixture sink to the bottom of the cylinder and will not enter the compressor through the return oil pipe. Furthermore, under the influence of pressure, the refrigerant mixture drawn from the return oil pipe is less likely to clog the return oil pipe opening, making the oil return from the compressor smoother and more effective.

[0011] Furthermore, the connecting pipe is a variable diameter structure, and in the axial direction of the connecting pipe, the cross-sectional area at the oil return hole is smaller than the cross-sectional areas on both sides of the oil return hole.

[0012] In the liquid distributor provided herein, the connecting tube has a variable diameter structure, with the cross-sectional area at the oil return pipe connection being smaller than the cross-sectional area on either side of the oil return hole. Consequently, during use, the refrigerant mixture drawn in gradually accelerates as it flows through the connecting tube, significantly increasing the flow rate of the drawn in refrigerant mixture. Due to the variable cross-sectional structure of the connecting tube, the flow rate at the oil return pipe connection increases, while the fluid pressure decreases. Specifically, the pressure at the connection point between the oil return pipe and the connecting tube decreases, while the pressure inside the cylinder is higher than the pressure at the oil return pipe connection. Under the influence of the pressure differential, the refrigerant mixture within the cylinder is drawn through the oil return pipe and into the connecting tube. Gravity, however, forces metallic impurities in the refrigerant mixture to settle to the bottom of the cylinder and prevent it from entering the compressor through the oil return pipe. Furthermore, under pressure, the refrigerant mixture drawn in through the oil return pipe is less likely to clog the oil return pipe opening, resulting in smoother oil return from the compressor and improved performance. Furthermore, as the refrigerant mixture passes through the bottom of the connecting tube, the compressor's intake flow rate increases, airflow losses are reduced, and the compressor's intake efficiency is improved, thereby enhancing the performance of the entire air conditioning system.

[0013] Compared to the traditional straight tube design with a constant cross-section, the liquid separator provided by the present application can effectively reduce the resistance and flow loss of the refrigerant mixture during the suction process, preventing metal impurities and colloid-like substances in the refrigerant oil from clogging the oil return hole, thereby improving the suction efficiency and oil return effect of the compressor. In addition, the variable cross-section design of the connecting tube can optimize the airflow distribution of the refrigerant mixture, allowing the compressor to maintain a high performance level under different working conditions, with good energy-saving effects and operational stability. The present utility model has a simple structure and low manufacturing cost, and is suitable for various types of compressor equipment, especially air-conditioning systems with high-efficiency refrigeration.

[0014] Furthermore, the cross-sectional area of ​​the connecting pipe changes linearly, and the size relationship among the cross-sectional area D1 at the top of the connecting pipe, the cross-sectional area D2 at the oil return hole, and the cross-sectional area D3 at the bottom of the connecting pipe is: D3>D2, D1>D2.

[0015] Furthermore, the size relationship among the cross-sectional area D1 at the top end of the communicating pipe, the cross-sectional area D2 at the oil return hole, and the cross-sectional area D3 at the bottom end of the communicating pipe is: D1>D3>D2.

[0016] Furthermore, on the connecting pipe, the cross-sectional area of ​​the connecting pipe at the oil return hole is the smallest.

[0017] Furthermore, the number of the oil return holes is at least two, and the oil return holes are on the same cross section of the connecting pipe, and / or the oil return holes are arranged at intervals along the axial direction of the connecting pipe.

[0018] Furthermore, the air outlet pipe includes an air inlet and at least two air outlets, the air inlet is used to be connected to the bottom end of the connecting pipe, and the air outlet is used to be connected to the compressor pump body.

[0019] Furthermore, it also includes a partition, which divides the inner cavity of the cylinder into an upper cylinder and a lower cylinder, and the air inlet pipe is located in the upper cylinder, and the air outlet pipe is located in the lower cylinder.

[0020] In the liquid dispenser provided in the present application, the partition separates the inner cavity of the cylinder into an upper cylinder and a lower cylinder, and at the same time supports the cylinder from the inside to increase the overall rigidity of the cylinder.

[0021] Furthermore, the oil return pipe is entirely located inside the lower cylinder.

[0022] Furthermore, a filter is provided in the upper cylinder, which divides the inner part of the upper cylinder into an upper chamber and a lower chamber. The air inlet pipe is located in the upper chamber, and the top end of the connecting pipe is located in the lower chamber.

[0023] Furthermore, at least two connecting pipes are provided in the cylinder.

[0024] Furthermore, the cross-sectional shapes, the number of oil return holes, or the height positions of the oil return holes of different connecting pipes may be the same, partially the same, or different.

[0025] On the other hand, the present invention further provides a compressor, comprising a motor, a compressor pump body and the above-mentioned liquid separator, wherein the air outlet pipe in the liquid separator is connected to the compressor pump body.

[0026] Because the compressor provided herein includes the aforementioned liquid distributor, the variable cross-section design of the connecting tube in the liquid distributor significantly increases the flow rate of the refrigerant mixture drawn in as it flows through the connecting tube. The flow rate at the oil return pipe connection is the highest, compared to the flow rates at the oil return pipe connection, the bottom end of the connecting tube, and the top end of the connecting tube. Due to the variable cross-section design of the connecting tube, the flow rate at the oil return pipe connection increases, while the fluid pressure decreases. Specifically, the pressure at the connection point between the oil return pipe and the connecting tube decreases, and the pressure within the cylinder is now greater than the pressure at the oil return pipe connection. Under the influence of the pressure differential, the refrigerant mixture within the cylinder is drawn in through the oil return pipe and into the connecting tube. Due to gravity, metallic impurities within the refrigerant mixture settle to the bottom of the cylinder and are prevented from entering the compressor through the oil return pipe. Furthermore, under pressure, the refrigerant mixture drawn in through the oil return pipe is less likely to clog the oil return pipe opening, resulting in smoother oil return from the compressor and improved performance. At the same time, when the refrigerant mixture passes through the bottom end of the connecting pipe, the suction flow rate of the compressor increases, the air flow loss is reduced, and the suction efficiency of the compressor is improved, thereby improving the performance of the entire air-conditioning system.

[0027] On the other hand, the present invention further provides an air-conditioning system, comprising a system pipeline and the above-mentioned compressor, wherein the air inlet pipe in the liquid separator is connected to the system pipeline.

[0028] Because the air conditioning system provided herein includes the aforementioned compressor, the variable cross-section design of the connecting pipe in the liquid distributor significantly increases the flow rate of the refrigerant mixture drawn in as it flows through the connecting pipe. The flow rate at the oil return pipe connection is the highest, compared to the flow rates at the oil return pipe connection, the bottom end of the connecting pipe, and the top end of the connecting pipe. Due to the variable cross-section design of the connecting pipe, the flow rate at the oil return pipe connection increases, while the fluid pressure decreases. Specifically, the pressure at the connection point between the oil return pipe and the connecting pipe decreases, and the pressure within the cylinder is now greater than the pressure at the oil return pipe connection. Under the influence of the pressure differential, the refrigerant mixture within the cylinder is drawn through the oil return pipe and into the connecting pipe. Gravity forces metal impurities within the refrigerant mixture to settle at the bottom of the cylinder and prevent it from entering the compressor via the oil return pipe. Furthermore, under the influence of pressure, the refrigerant mixture drawn in through the oil return pipe is less likely to clog the oil return pipe opening, resulting in smoother oil return from the compressor and improved performance. At the same time, when the refrigerant mixture passes through the bottom end of the connecting pipe, the suction flow rate of the compressor increases, the air flow loss is reduced, and the suction efficiency of the compressor is improved, thereby improving the performance of the entire air-conditioning system.

[0029] The beneficial effects of the utility model are:

[0030] In the liquid separator provided in the present application, the partition separates the inner cavity of the cylinder into an upper cylinder and a lower cylinder, and at the same time can also support the cylinder from the inside to increase the rigidity of the cylinder as a whole. When the liquid separator provided in the present application is used, it is connected to the air conditioning system pipeline through the air inlet pipe in the upper cylinder, and is connected to the compressor pump body through the air outlet pipe in the lower cylinder. In addition, the liquid separator provided in the present application can prevent the liquid refrigerant in the refrigeration system in the air conditioning system from entering the compressor, which can improve the reliability and efficiency of the air conditioning system and extend the service life of the compressor.

[0031] In addition, the liquid separator provided in the present application also includes an oil return pipe and a variable-section connecting pipe. The top of the connecting pipe is lower than the bottom of the air inlet pipe, and a certain distance is maintained between the two to prevent the refrigerant mixture from directly entering the connecting pipe, thereby achieving a preliminary separation of the liquid portion, gaseous portion, and impurities in the refrigerant mixture. At the same time, the connecting pipe adopts a variable-section structure, and the cross-sectional area D2 at the connection of the oil return pipe is smaller than the cross-sectional area D3 at the bottom of the connecting pipe, and the cross-sectional area D3 at the bottom of the connecting pipe is smaller than the cross-sectional area D1 at the top of the connecting pipe. Therefore, when in use, the refrigerant mixture drawn in can be gradually accelerated as it flows through the connecting pipe channel due to the variable-section layout of the connecting pipe, thereby significantly increasing the flow rate of the drawn-in refrigerant mixture. Among them, compared with the flow rate at the connection of the oil return pipe, the flow rate at the bottom of the connecting pipe, and the flow rate at the top of the connecting pipe, the flow rate at the connection of the oil return pipe is the highest. Due to the variable cross-section structure of the connecting pipe, the flow rate at the oil return pipe connection increases, while the fluid pressure there decreases. That is, the pressure at the connection point between the oil return pipe and the connecting pipe decreases, and the pressure in the lower cylinder is now greater than the pressure at the oil return pipe connection. Under the influence of the pressure difference, the refrigerant mixture in the lower cylinder is sucked from the lower end of the oil return pipe to the upper end of the oil return pipe and into the connecting pipe. Under the influence of gravity, the metal impurities in the refrigerant mixture sink to the bottom of the lower cylinder and will not enter the compressor through the oil return pipe. Furthermore, under the influence of pressure, the refrigerant mixture sucked from the oil return pipe is less likely to clog the oil return pipe port, making the compressor's oil return smoother and more effective. At the same time, when the refrigerant mixture passes through the bottom of the connecting pipe, the compressor's suction flow rate increases, airflow losses decrease, and the compressor's suction efficiency is improved, thereby enhancing the performance of the entire air conditioning system.

[0032] Compared with the traditional straight tube design with a constant cross-section, the liquid separator provided by the present application can effectively reduce the resistance and flow loss of the refrigerant mixture during the suction process, and prevent metal impurities and colloid-like substances in the refrigerant oil from clogging the oil return hole, thereby improving the suction efficiency and oil return effect of the compressor. In addition, the variable cross-section design of the connecting tube can optimize the airflow distribution of the refrigerant mixture, so that the compressor can maintain a high performance level under different working conditions, and has good energy-saving effects and operational stability. The liquid separator provided by the present application has a simple structure and low manufacturing cost, and is suitable for various types of compressor equipment, especially air-conditioning systems with high-efficiency refrigeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural diagram of Example 1.

[0034] Figure 2 Schematic diagram of the cross-sectional area D1 at the top end of the connecting pipe, the cross-sectional area D2 at the oil return hole, and the cross-sectional area D3 at the bottom end of the connecting pipe in Example 1.

[0035] Figure 3This is a schematic diagram of the first structure of the connecting pipe and the oil return pipe in Example 1.

[0036] Figure 4 This is a schematic diagram of the second structure of the connecting pipe and the oil return pipe in Example 1.

[0037] Figure 5 This is a schematic diagram of the third structure of the connecting pipe and the oil return pipe in Example 1.

[0038] Figure 6 This is a schematic structural diagram of Example 2.

[0039] Figure 7 This is a structural diagram of Example 3.

[0040] Figure 8 This is a structural diagram of Example 4.

[0041] Reference numerals:

[0042] 1-cylinder, 11-upper cylinder, 111-upper chamber, 112-lower chamber, 12-lower cylinder, 13-inlet pipe, 14-outlet pipe, 141-inlet port, 142-outlet port, 15-filter, 2-partition, 3-return oil pipe, 4-connecting pipe, 5-motor, 6-compressor pump body. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below with reference to test examples and specific implementation methods. However, this should not be construed as limiting the scope of the present invention to the following embodiments. All technologies implemented based on the present invention fall within the scope of the present invention.

[0044] Example 1

[0045] In traditional compressor designs, the liquid distributor typically uses a straight steel pipe structure with a constant cross-section, and the oil return hole is opened on the straight steel pipe. However, in actual applications, this design often leads to a low suction flow rate, metal impurities easily block the oil return hole, and the refrigerant oil condenses into a gel-like substance at the oil return hole due to temperature, thereby blocking the oil return hole, thereby affecting the suction efficiency and overall performance of the compressor. This embodiment 1 provides a liquid distributor. By introducing a variable cross-section straight pipe structure into the liquid distributor, it can effectively increase the suction flow rate, reduce airflow losses, and improve the oil return effect of the compressor, thereby improving the suction efficiency of the compressor and further enhancing the performance of the entire air-conditioning system.

[0046] like Figures 1 to 3 As shown, the liquid distributor provided in this embodiment 1 includes a cylinder 1, a partition 2, an oil return pipe 3 and a variable-section connecting pipe 4.

[0047] In this embodiment 1, the partition 2 divides the inner cavity of the cylinder 1 into the upper cylinder 11 and the lower cylinder 12, and at the same time supports the cylinder 1 from the inside to increase the overall rigidity of the cylinder 1. In addition, an air intake pipe 13 is provided in the upper cylinder 11 so that when this embodiment 1 is in use, it can be connected to the air conditioning system pipeline through the air intake pipe 13. Preferably, as Figure 1 As shown, the air inlet pipe 13 can be arranged on the top of the upper cylinder 11. In this embodiment 1, the lower cylinder 12 is provided with an air outlet pipe 14, so that when this embodiment 1 is in use, it can be connected to the compressor pump body 6 through the air outlet pipe 14. Preferably, as Figure 1 As shown, the air outlet pipe 14 can be arranged at the bottom of the lower cylinder 12. When in use, this embodiment 1 can prevent the liquid refrigerant in the refrigeration system of the air conditioning system from entering the compressor, thereby improving the reliability and efficiency of the air conditioning system and extending the service life of the compressor.

[0048] like Figure 1 As shown, in this embodiment 1, the bottom end of the connecting pipe 4 is connected to the air outlet pipe 14 , the top end passes through the partition 2 and extends into the upper cylinder 11 , and the top end of the connecting pipe 4 is located below the air inlet pipe 13 .

[0049] In this embodiment 1, the top of the connecting tube 4 is lower than the bottom of the intake pipe 13, and a certain distance is maintained between the top and the bottom to prevent the refrigerant mixture from directly entering the connecting tube 4, thereby achieving a preliminary separation of the liquid portion, the gaseous portion, and impurities in the refrigerant mixture. More preferably, the connecting tube 4 and the intake pipe 13 can be arranged vertically offset.

[0050] In order to be able to further filter out impurities in the refrigerant mixture, such as Figure 1 As shown, in this embodiment 1, a filter screen 15 is provided inside the upper cylinder 11, and the filter screen 15 divides the interior of the upper cylinder 11 into an upper chamber 111 and a lower chamber 112, and the air intake pipe 13 is located in the upper chamber 111, and the top end of the connecting pipe 4 is located in the lower chamber 112.

[0051] In this embodiment 1, the connecting pipe 4 is provided with an oil return hole, and one end of the oil return pipe 3 is connected to the oil return hole and the other end extends into the lower cylinder 12. Preferably, to simplify the structure and facilitate the processing and manufacturing of this embodiment 1, the oil return pipe 3 can be located entirely within the lower cylinder 12.

[0052] like Figure 2 and Figure 3 As shown, the connecting pipe 4 in this embodiment 1 adopts a variable cross-section structure, and the size relationship between the cross-sectional area D1 at the top of the connecting pipe 4, the cross-sectional area D2 at the oil return hole, and the cross-sectional area D3 at the bottom of the connecting pipe 4 is: D1>D3>D2.

[0053] Then, when using, according to the continuity equation Under the principle that the refrigerant mixture's flow rate increases while its pressure decreases, and pressure energy is converted into kinetic energy, the refrigerant mixture's flow velocity increases while its pressure decreases, while the refrigerant mixture's flow rate remains constant. This principle allows the refrigerant mixture to gradually accelerate as it flows through the connecting pipe 4, due to the variable cross-section layout of the connecting pipe 4, significantly increasing its flow velocity. The flow velocity at the connection point of the return pipe 3 is the highest, compared to the flow velocity at the bottom end of the connecting pipe 4, the flow velocity at the top end of the connecting pipe 4, and the flow velocity at the top end of the connecting pipe 4. Due to the variable cross-section structure of the connecting pipe 4, the flow velocity at the connection point of the return pipe 3 increases while the fluid pressure decreases. Specifically, the pressure at the connection point between the return pipe 3 and the connecting pipe 4 decreases, and at this point, the pressure within the lower cylinder 12 is greater than the pressure at the connection point of the return pipe 3. Under the influence of the pressure differential, the refrigerant mixture within the lower cylinder 12 is drawn from the lower end of the return pipe 3 into the upper end of the return pipe 3 and into the connecting pipe 4. Under the influence of gravity, metallic impurities within the refrigerant mixture sink to the bottom of lower cylinder 12 and are prevented from entering the compressor via oil return pipe 3. Furthermore, under the influence of pressure, the refrigerant mixture drawn through oil return pipe 3 is less likely to clog the opening of oil return pipe 3, resulting in smoother oil return from the compressor and improved performance. Furthermore, as the refrigerant mixture passes through the bottom of connecting pipe 4, the compressor's suction flow rate increases, airflow losses are reduced, and the compressor's suction efficiency is improved, thereby enhancing the performance of the entire air conditioning system.

[0054] Compared to traditional straight tube designs with constant cross-sections, the liquid distributor provided in Example 1 effectively reduces resistance and flow losses during the refrigerant mixture's suction process, preventing metal impurities and colloid-like substances in the refrigerant from clogging the oil return hole, thereby improving the compressor's suction efficiency and oil return performance. Furthermore, the variable cross-section design of connecting tube 4 optimizes the airflow distribution of the refrigerant mixture, enabling the compressor to maintain high performance levels under various operating conditions, resulting in excellent energy savings and operational stability. This Example 1 is simple and has low manufacturing costs, making it suitable for various compressor equipment, particularly high-efficiency air conditioning systems.

[0055] In order to further improve the suction efficiency and oil return effect of the compressor, the cross-sectional area of ​​the connecting pipe 4 at the oil return hole is minimized.

[0056] In this embodiment 1, the number of the oil return holes may be at least two, and the oil return holes are on the same cross section of the connecting pipe 4 , and / or the oil return holes are arranged at intervals along the axial direction of the connecting pipe 4 .

[0057] Specifically, Figure 4 The figure shows a connection form between the connecting pipe 4 and the oil return pipe 3. Figure 4 In the embodiment, two oil return pipes 3 are provided on the connecting pipe 4, and the two oil return pipes 3 are arranged at intervals up and down. Figure 4 In the view shown, the cross-sectional area of ​​the entire connecting pipe 4 at the connection point with the oil return pipe 3 is the smallest.

[0058] Figure 5 Another connection form between the connecting pipe 4 and the oil return pipe 3 is shown. Figure 5 In the embodiment, at a certain cross section of the connecting pipe 4, two oil return pipes 3 are arranged at the same time. Figure 5 In the view shown, the cross-sectional area of ​​the entire connecting pipe 4 at the connection point with the oil return pipe 3 is the smallest.

[0059] Of course, the oil return pipes 3 on the connecting pipe 4 can be arranged at intervals in the axial direction of the connecting pipe 4 according to actual conditions, or at least two oil return pipes 3 can be arranged simultaneously in a certain cross section of the connecting pipe 4.

[0060] Example 2

[0061] In traditional compressor designs, the liquid distributor typically uses a straight steel pipe structure with a constant cross-section, and the oil return hole is opened on the straight steel pipe. However, in actual applications, this design often leads to a low suction flow rate, metal impurities easily block the oil return hole, and the refrigerant oil condenses into a gel-like substance at the oil return hole due to temperature, blocking the oil return hole, thereby affecting the suction efficiency and overall performance of the compressor. This embodiment 2 provides a liquid distributor. By introducing a variable cross-section straight pipe structure into the liquid distributor, it can effectively increase the suction flow rate, reduce airflow losses, and improve the oil return effect of the compressor, thereby improving the suction efficiency of the compressor and, in turn, the performance of the entire air-conditioning system.

[0062] The difference between the liquid separator provided in Example 2 and the liquid separator provided in Example 1 is that at least two connecting pipes 4 are provided in the barrel 1 of Example 2.

[0063] To simplify the structure, Figure 6 As shown, in this embodiment 2, two connecting pipes 4 are provided in the cylinder 1, and each connecting pipe 4 is provided with an oil return pipe 3.

[0064] It should be understood that, in these two connecting pipes 4 , the cross-sectional shape of the connecting pipe 4 , the number of oil return holes on the connecting pipe 4 , and the height positions of the oil return holes on the connecting pipe 4 may be the same, partially the same, or different.

[0065] Example 3

[0066] In traditional compressor designs, the liquid distributor typically uses a straight steel pipe structure with a constant cross-section, and the oil return hole is opened on the straight steel pipe. However, in actual applications, this design often leads to a low suction flow rate, metal impurities easily block the oil return hole, and the refrigerant oil condenses into a gel-like substance at the oil return hole due to temperature, thereby blocking the oil return hole, thereby affecting the suction efficiency and overall performance of the compressor. This embodiment 3 provides a liquid distributor. By introducing a variable cross-section straight pipe structure into the liquid distributor, it can effectively increase the suction flow rate, reduce airflow losses, and improve the oil return effect of the compressor, thereby improving the suction efficiency of the compressor and, in turn, the performance of the entire air-conditioning system.

[0067] The liquid dispenser provided in this embodiment 3 differs from the liquid dispenser provided in embodiment 1 in that:

[0068] In this embodiment 3, the air outlet pipe 14 includes an air inlet 141 and at least two air outlets 142 , and the air inlet 141 is connected to the bottom end of the connecting pipe 4 , and the air outlet 142 is used to connect to the compressor pump body 6 .

[0069] To simplify the structure, Figure 7 As shown, the air outlet pipe 14 in this embodiment 3 includes an air inlet 141 and two air outlets 142. The arrangement direction and position of the two air outlets 142 can be selected according to actual conditions.

[0070] Example 4

[0071] In traditional compressor designs, the liquid distributor typically uses a straight steel pipe structure with a constant cross-section, and the oil return hole is opened on the straight steel pipe. However, in actual applications, this design often leads to a low suction flow rate, metal impurities easily block the oil return hole, and the refrigerant oil condenses into a gel-like substance at the oil return hole due to temperature, thereby blocking the oil return hole, thereby affecting the suction efficiency and overall performance of the compressor. This embodiment 4 provides a compressor that, by introducing a variable cross-section straight pipe structure in the liquid distributor, can effectively increase the suction flow rate, reduce airflow losses, and improve the oil return effect of the compressor, thereby improving the suction efficiency of the compressor and, in turn, the performance of the entire air-conditioning system.

[0072] like Figure 8 As shown, the compressor provided in this embodiment 4 includes a motor 5, a compressor pump body 6 and a liquid separator described in any one of embodiments 1 to 3, and the air outlet pipe 14 in the liquid separator is connected to the compressor pump body 6.

[0073] Since the compressor provided in this embodiment 4 includes the liquid separator described in any one of embodiments 1 to 3, the compressor provided in this embodiment 4 can significantly increase the flow rate of the refrigerant mixture sucked in when it flows through the channel of the connecting pipe 4 by means of the variable cross-section structure design of the connecting pipe 4 in the liquid separator. Among them, compared with the flow rate at the connection of the return oil pipe 3, the flow rate at the bottom end of the connecting pipe 4 and the flow rate at the top end of the connecting pipe 4, the flow rate at the connection of the return oil pipe 3 is the largest. Due to the variable cross-section structure setting of the connecting pipe 4, the flow rate at the connection of the return oil pipe 3 becomes larger and the fluid pressure becomes smaller. That is, the pressure at the connection point between the return oil pipe 3 and the connecting pipe 4 becomes smaller. At this time, the pressure in the lower cylinder 12 is greater than the pressure at the connection point of the return oil pipe 3. Under the action of the pressure difference, the refrigerant mixture in the lower cylinder 12 is sucked from the lower end of the return oil pipe 3 to the upper end of the return oil pipe 3 and enters the connecting pipe 4. Under the influence of gravity, metallic impurities within the refrigerant mixture sink to the bottom of lower cylinder 12 and are prevented from entering the compressor via oil return pipe 3. Furthermore, under the influence of pressure, the refrigerant mixture drawn through oil return pipe 3 is less likely to clog the opening of oil return pipe 3, resulting in smoother oil return from the compressor and improved performance. Furthermore, as the refrigerant mixture passes through the bottom of connecting pipe 4, the compressor's suction flow rate increases, airflow losses are reduced, and the compressor's suction efficiency is improved, thereby enhancing the performance of the entire air conditioning system.

[0074] Example 5

[0075] In traditional compressor designs, the liquid distributor typically utilizes a straight steel pipe structure with a constant cross-section, and the oil return hole is provided on the straight steel pipe. However, in actual applications, this design often results in a low suction flow rate, metal impurities easily clogging the oil return hole, and the refrigerant oil condenses into a gel-like substance at the oil return hole due to temperature, thereby blocking the oil return hole, thereby affecting the suction efficiency and overall performance of the compressor. This embodiment 5 provides an air-conditioning system that, by introducing a variable cross-section straight pipe structure into the liquid distributor, can effectively increase the suction flow rate, reduce airflow losses, and improve the oil return effect of the compressor, thereby improving the suction efficiency of the compressor and, in turn, the performance of the entire air-conditioning system.

[0076] This embodiment 5 also provides an air conditioning system, including system pipelines and the compressor in embodiment 4, wherein the air inlet pipe 13 in the liquid separator is connected to the system pipeline.

[0077] Because the air conditioning system provided in this embodiment 5 includes the compressor of embodiment 4, the air conditioning system provided in this embodiment 5 can significantly increase the flow rate of the refrigerant mixture sucked in when it flows through the channel of the connecting pipe 4 by designing the variable cross-section structure of the connecting pipe 4 in the liquid separator. The flow rate at the connection of the return oil pipe 3 is the highest compared to the flow rate at the connection of the return oil pipe 3, the flow rate at the bottom end of the connecting pipe 4, and the flow rate at the top end of the connecting pipe 4. Due to the variable cross-section structure of the connecting pipe 4, the flow rate at the connection of the return oil pipe 3 increases and the fluid pressure decreases. That is, the pressure at the connection between the return oil pipe 3 and the connecting pipe 4 decreases, and at this time, the pressure in the lower cylinder 12 is greater than the pressure at the connection of the return oil pipe 3. Under the action of the pressure difference, the refrigerant mixture in the lower cylinder 12 is sucked from the lower end of the return oil pipe 3 to the upper end of the return oil pipe 3 and enters the connecting pipe 4. Under the influence of gravity, metallic impurities within the refrigerant mixture sink to the bottom of lower cylinder 12 and are prevented from entering the compressor via oil return pipe 3. Furthermore, under the influence of pressure, the refrigerant mixture drawn through oil return pipe 3 is less likely to clog the opening of oil return pipe 3, resulting in smoother oil return from the compressor and improved performance. Furthermore, as the refrigerant mixture passes through the bottom of connecting pipe 4, the compressor's suction flow rate increases, airflow losses are reduced, and the compressor's suction efficiency is improved, thereby enhancing the performance of the entire air conditioning system.

[0078] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A liquid dispenser, characterized in that: It comprises a cylinder, on which an air inlet pipe for connecting to an air conditioning system pipeline and an air outlet pipe for connecting to a compressor pump body are provided; It also includes an oil return pipe and a connecting pipe, one end of the connecting pipe is connected to the air outlet pipe, and the other end is located below the air inlet pipe; one end of the oil return pipe is connected to the oil return hole on the connecting pipe, and the other end extends into the cylinder; When in use, the pressure in the cylinder is greater than the pressure at the connection between the oil return pipe and the connecting pipe.

2. The liquid dispenser according to claim 1, characterized in that: The connecting pipe is a variable diameter structure, and in the axial direction of the connecting pipe, the cross-sectional area at the oil return hole is smaller than the cross-sectional areas at both sides of the oil return hole.

3. The liquid dispenser according to claim 2, characterized in that: In the axial direction of the connecting pipe, the cross-sectional area of ​​the connecting pipe changes linearly, and the size relationship among the cross-sectional area D1 at the top end of the connecting pipe, the cross-sectional area D2 at the oil return hole, and the cross-sectional area D3 at the bottom end of the connecting pipe is: D3>D2, D1>D2.

4. The liquid dispenser according to claim 3, characterized in that: The size relationship among the cross-sectional area D1 of the top end of the communicating pipe, the cross-sectional area D2 at the oil return hole, and the cross-sectional area D3 of the bottom end of the communicating pipe is: D1>D3>D2.

5. The liquid dispenser according to claim 2, characterized in that: On the connecting pipe, the cross-sectional area of ​​the connecting pipe at the oil return hole is the smallest.

6. The liquid dispenser according to claim 1, characterized in that: The number of the oil return holes is at least two, and the oil return holes are on the same cross section of the connecting pipe, and / or the oil return holes are arranged at intervals along the axial direction of the connecting pipe.

7. The liquid dispenser according to claim 1, characterized in that: The air outlet pipe includes an air inlet and at least two air outlets. The air inlet is used to be connected to the bottom end of the connecting pipe, and the air outlet is used to be connected to the compressor pump body.

8. The liquid dispenser according to claim 1, characterized in that: It also includes a partition that divides the inner cavity of the cylinder into an upper cylinder and a lower cylinder, and the air inlet pipe is located in the upper cylinder, and the air outlet pipe is located in the lower cylinder.

9. The liquid dispenser according to claim 8, characterized in that: The oil return pipe is entirely located in the lower cylinder.

10. The liquid dispenser according to claim 8, characterized in that: A filter is provided in the upper cylinder, which divides the inner part of the upper cylinder into an upper chamber and a lower chamber. The air inlet pipe is located in the upper chamber, and the top end of the connecting pipe is located in the lower chamber.

11. The liquid dispenser according to any one of claims 1 to 10, characterized in that: At least two connecting pipes are provided in the cylinder.

12. The liquid dispenser according to claim 11, characterized in that: The cross-sectional shapes, the number of oil return holes or the height positions of the oil return holes between different connecting pipes may be the same, partially the same or different.

13. A compressor, characterized in that: The device comprises a motor, a compressor pump body and a liquid separator according to any one of claims 1 to 12, wherein the air outlet pipe in the liquid separator is connected to the compressor pump body.

14. An air conditioning system, characterized in that: The invention comprises a system pipeline and the compressor according to claim 13, wherein the air inlet pipe in the liquid separator is connected to the system pipeline.

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