Gas-liquid separator, heat pump air conditioning system and vehicle

Abstract

The utility model relates to the technical field of vehicles, and provides a gas-liquid separator, a heat pump air conditioning system and a vehicle. The gas-liquid separator comprises a tank body, a tank cover, an umbrella cup and an air suction pipe, the tank cover is arranged at the top of the tank body, the tank cover and the tank body jointly form a containing cavity, and a low-pressure inlet, a low-pressure outlet and a bypass inlet are formed in the tank cover; the umbrella cup is arranged below the tank cover and comprises an umbrella cup top wall and an umbrella cup side wall, a mixing cavity is formed between the umbrella cup top wall and the inner top wall of the tank cover, the low-pressure inlet and the bypass inlet are both communicated with the mixing cavity, and a circulation gap is formed between the umbrella cup side wall and the tank cover or the inner side wall of the tank body. The circulation gap is communicated with the mixing chamber and the accommodating cavity positioned below the umbrella cup; the air suction pipe is arranged in the containing cavity and provided with an inlet end and an outlet end, the inlet end is located in the inner surrounding area of the side wall of the umbrella cup and communicated with the containing cavity, and the outlet end penetrates through the top wall of the umbrella cup and communicated with the low-pressure outlet. In this way, the mixed refrigerant can be cooled, and the problem that the superheat degree of sucked air is too high is solved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a gas-liquid separator, a heat pump air conditioning system, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicles, heat pump air conditioning systems have become a development trend in new energy vehicles. However, existing heat pump air conditioning systems in new energy vehicles often fail to meet the demand for rapid heating in winter or low-temperature conditions due to the reduced compressor suction pressure and refrigerant flow caused by the low outside temperature.

[0003] In related technologies, a hot gas bypass pipeline is added to the heat pump air conditioning system to directly bypass some of the high-pressure gas discharged from the compressor into the gas-liquid separator, thereby increasing the system's return gas pressure. However, the addition of bypass gas can easily lead to an increase in suction superheat, which in turn causes the compressor to overheat and affect its normal operation. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a gas-liquid separator, a heat pump air conditioning system, and a vehicle.

[0005] The first aspect of this application provides a gas-liquid separator, comprising:

[0006] Tank body;

[0007] A can lid is located on the top of the can body and together with the can body forms a receiving cavity. The can lid is provided with a low-pressure inlet, a low-pressure outlet and a bypass inlet.

[0008] An umbrella cup, located below the can lid, includes a top wall and a side wall connected to the periphery of the top wall. A mixing chamber is formed between the top wall of the umbrella cup and the inner top wall of the can lid. The low-pressure inlet and the bypass inlet are both connected to the mixing chamber. A flow gap is formed between the side wall of the umbrella cup and the inner side wall of the can lid, or between the side wall of the umbrella cup and the inner side wall of the can body. The flow gap connects the mixing chamber and the receiving cavity located below the umbrella cup.

[0009] An air inlet tube is disposed within the receiving cavity. The air inlet tube has an inlet end and an outlet end. The inlet end is located in the inner perimeter region of the umbrella cup sidewall and communicates with the receiving cavity. The outlet end passes through the top wall of the umbrella cup and communicates with the low-pressure outlet.

[0010] The gas-liquid separator provided in this application features a low-pressure inlet, a low-pressure outlet, and a bypass inlet on the tank cover. A finned refrigerant cup is located below the tank cover, and a mixing chamber is formed between the top wall of the finned cup and the inner top wall of the tank cover. This allows the low-temperature, low-pressure refrigerant entering through the low-pressure inlet and the high-temperature, high-pressure refrigerant entering through the bypass inlet to mix thoroughly in the mixing chamber. The temperature of the mixed refrigerant decreases, and after impacting the top wall of the finned cup and dispersing, it flows downwards along the side wall of the finned cup and the inner side wall of the tank cover (or tank body), thereby guiding the mixed refrigerant to the bottom of the receiving cavity. The liquid refrigerant stored at the bottom is mixed and evaporated into gaseous refrigerant. This serves two purposes: firstly, it cools the mixed refrigerant, preventing excessive superheat in the suction flow; secondly, it allows for the effective utilization of the liquid refrigerant stored at the bottom. Furthermore, since the inlet of the suction pipe is located in the inner circumference of the umbrella cup side wall, this effectively prevents the mixed refrigerant from being directly drawn into the inlet of the suction pipe before it has had a chance to mix with the liquid refrigerant stored at the bottom, and then discharged into the compressor through the outlet of the suction pipe, thus avoiding the problem of excessive superheat in the compressor suction flow.

[0011] Optionally, the bypass inlet and the low-pressure inlet are arranged to cross each other and communicate with each other, and the bypass inlet and the low-pressure inlet form a mixing port at the inner top wall of the can cover.

[0012] The above scheme allows for the mixing of high-temperature, high-pressure refrigerant entering through the bypass inlet and low-temperature, low-pressure refrigerant entering through the low-pressure inlet before they enter the mixing chamber. The refrigerant then undergoes secondary mixing within the mixing chamber, ensuring a more thorough mixing of the two refrigerants.

[0013] Optionally, the central region of the top wall of the umbrella cup protrudes upward relative to the peripheral region of the top wall of the umbrella cup, and the mixing port corresponds vertically to the central region of the top wall of the umbrella cup.

[0014] The above scheme allows the mixed refrigerant entering through the mixing port to first collide with the central area of ​​the top wall of the umbrella cup and then disperse outwards, and then collide with the peripheral area of ​​the top wall of the umbrella cup and disperse outwards. This results in the mixed refrigerant flowing downwards in a stepped manner and dispersing outwards around the umbrella cup, thereby improving the flow speed and uniformity of the mixed refrigerant as it disperses outwards.

[0015] Optionally, the bypass inlet and the low-pressure inlet are independently provided, the bypass inlet forming a bypass port on the inner top wall of the can cover, and the low-pressure inlet forming a low-pressure port on the inner top wall of the can cover.

[0016] The above scheme allows high-temperature, high-pressure refrigerant entering through the bypass inlet and low-temperature, low-pressure refrigerant entering through the low-pressure inlet to enter the mixing chamber without interference. In other words, they are not mixed before entering the mixing chamber, but are mixed after entering the mixing chamber. This makes the structure of the gas-liquid separator simpler and the manufacturing cost lower. In addition, the mixing chamber can play a role in noise reduction, effectively reducing the noise generated during refrigerant mixing.

[0017] Optionally, the upper surface of the top wall of the umbrella cup is provided with a first flow guiding protrusion and a second flow guiding protrusion, the first flow guiding protrusion being vertically corresponding to the bypass port, and the second flow guiding protrusion being vertically corresponding to the low-pressure port.

[0018] The above scheme allows for more thorough mixing of the high-temperature, high-pressure refrigerant entering through the bypass inlet and the low-temperature, low-pressure refrigerant entering through the low-pressure inlet, thanks to the guiding effect of the first and second guide protrusions.

[0019] Optionally, the height of the mixing chamber is greater than or equal to a first preset height.

[0020] The above scheme ensures that the mixing chamber has sufficient height space, thereby ensuring that the high-temperature, high-pressure refrigerant entering through the bypass inlet and the low-temperature, low-pressure refrigerant entering through the low-pressure inlet can be fully mixed in the mixing chamber.

[0021] Optionally, the height of the umbrella cup sidewall is greater than or equal to a second preset height.

[0022] The above solution ensures that the side wall of the umbrella cup has sufficient height to guide the mixed refrigerant to the bottom of the receiving cavity, where it mixes with the liquid refrigerant stored at the bottom and evaporates into a gaseous state. This avoids the problem of excessive compressor suction overheating caused by the side wall of the umbrella cup being too short, which would result in the mixed refrigerant being directly drawn into the suction pipe by the compressor suction and unable to mix with the liquid refrigerant at the bottom.

[0023] Optionally, the intake pipe includes an intake channel section and an exhaust channel section;

[0024] Both the intake channel section and the exhaust channel section extend vertically. The bottom of the intake channel section and the bottom of the exhaust channel section are connected. The top of the intake channel section forms the inlet end, and the top of the exhaust channel section forms the outlet end. The inlet area of ​​the inlet end is less than or equal to the outlet area of ​​the outlet end. An oil return hole is provided at the bottom of one of the intake channel section and the exhaust channel section.

[0025] By setting the inlet area to be smaller than the outlet area, the inlet of the suction pipe is obstructed, creating a difference between the inlet and outlet areas. Under the suction force of the compressor, this difference in inlet and outlet areas leads to a pressure difference, which increases the flow rate of liquid refrigerant at the bottom of the cavity into the suction pipe through the oil return hole. This liquid refrigerant mixes with the gaseous refrigerant entering the suction pipe, thus cooling the gaseous refrigerant and preventing excessively high-temperature refrigerant from being drawn into the compressor through the outlet of the suction pipe.

[0026] A second aspect of this application provides a heat pump air conditioning system, including a compressor and a gas-liquid separator as described in any of the preceding claims, wherein the bypass inlet of the gas-liquid separator is selectively connected to or disconnected from the exhaust port of the compressor.

[0027] A third aspect of this application provides a vehicle including the heat pump air conditioning system as described above. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a gas-liquid separator provided in one embodiment of this application;

[0031] Figure 2 for Figure 1 A schematic diagram of the gas-liquid separator from another perspective;

[0032] Figure 3 for Figure 1 A top view schematic diagram of the gas-liquid separator shown;

[0033] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0034] Figure 5 for Figure 3 Axonometric schematic diagram of the cross-sectional structure along the AA direction;

[0035] Figure 6 for Figure 1A top view schematic diagram of the gas-liquid separator shown;

[0036] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along the BB direction;

[0037] Figure 8 for Figure 1 A schematic diagram of the umbrella cup structure of the gas-liquid separator shown;

[0038] Figure 9 This is a schematic diagram of the structure of a gas-liquid separator provided in another embodiment of this application;

[0039] Figure 10 for Figure 9 A top view schematic diagram of the gas-liquid separator shown;

[0040] Figure 11 for Figure 10 Schematic diagram of the cross-sectional structure along the CC direction;

[0041] Figure 12 for Figure 9 A top view schematic diagram of the gas-liquid separator shown;

[0042] Figure 13 for Figure 12 Schematic diagram of the cross-sectional structure along the DD direction;

[0043] Figure 14 for Figure 12 Axonometric schematic diagram of the cross-sectional structure along the DD direction;

[0044] Figure 15 for Figure 9 The diagram shows the structure of the umbrella cup of the gas-liquid separator.

[0045] Among them, 1. Tank body;

[0046] 2. Tank lid; 21. Low-pressure inlet; 22. Low-pressure outlet; 23. Bypass inlet; 24. First mounting hole;

[0047] 3. Umbrella cup; 30. Mounting through hole; 31. Top wall of umbrella cup; 32. Side wall of umbrella cup; 33. First guide protrusion; 34. Second guide protrusion; 35. Second mounting hole;

[0048] 4. Intake pipe; 41. Inlet end; 42. Outlet end; 43. Intake passage section; 44. Outlet passage section; 45. Oil return hole;

[0049] 5. Bypass valve;

[0050] 6. Oil return cap;

[0051] 7. Double-layer filter screen;

[0052] 8. Divider. Detailed Implementation

[0053] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0054] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0055] The gas-liquid separator, heat pump air conditioning system, and vehicle provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0056] Reference Figures 1 to 15 As shown, some embodiments of this application provide a gas-liquid separator, including: a tank body 1, a tank cover 2, an umbrella cup 3, and a suction pipe 4.

[0057] The can lid 2 is located on top of the can body 1 and together with the can body 1 forms a receiving cavity. The can lid 2 is provided with a low-pressure inlet 21, a low-pressure outlet 22 and a bypass inlet 23. The umbrella cup 3 is located below the can lid 2 and includes an umbrella cup top wall 31 and an umbrella cup side wall 32 connected to the periphery of the umbrella cup top wall 31. A mixing chamber is formed between the umbrella cup top wall 31 and the inner top wall of the can lid 2. The low-pressure inlet 21 and the bypass inlet 23 are both connected to the mixing chamber. A flow gap is formed between the umbrella cup side wall 32 and the inner side wall of the can lid 2 or the can body 1. The flow gap connects the mixing chamber and the receiving cavity located below the umbrella cup 3. The suction pipe 4 is located in the receiving cavity. The suction pipe 4 has an inlet end 41 and an outlet end 42. The inlet end 41 is located in the inner periphery of the umbrella cup side wall 32 and is connected to the receiving cavity. The outlet end 42 passes through the umbrella cup top wall 31 and is connected to the low-pressure outlet 22.

[0058] Reference Figure 4 and Figure 11 As shown in the diagram, a represents the mixing chamber, b represents the flow gap, and c represents the receiving chamber.

[0059] It should be noted that the gas-liquid separator provided in this application embodiment can be applied to a heat pump air conditioning system. Exemplarily, the low-pressure inlet 21 of the gas-liquid separator can be connected to the outlet pipe on the low-pressure side (e.g., the outlet pipe of the evaporator), the low-pressure outlet 22 of the gas-liquid separator can be connected to the return gas port of the compressor, and the bypass inlet 23 of the gas-liquid separator can be selectively connected to the exhaust port of the compressor. When the load of the heat pump air conditioning system decreases and the suction pressure of the compressor drops, the bypass inlet 23 of the gas-liquid separator can be controlled to connect to the exhaust port of the compressor, so that a portion of the high-temperature, high-pressure refrigerant discharged from the compressor's exhaust port is directly bypassed into the gas-liquid separator through the bypass inlet 23. The high-temperature, high-pressure refrigerant entering through the bypass inlet 23 can mix with the low-temperature, low-pressure refrigerant entering the gas-liquid separator through the low-pressure inlet 21, thereby increasing the return gas pressure of the heat pump air conditioning system and preventing the compressor from operating at excessively low pressure.

[0060] However, the addition of bypass gas can easily lead to increased suction superheat, which in turn can cause the compressor to overheat and affect its normal operation. Therefore, the gas-liquid separator provided in this application embodiment has a low-pressure inlet 21, a low-pressure outlet 22, and a bypass inlet 23 on the can lid 2, and a parasol cup 3 is provided below the can lid 2. A mixing chamber is formed between the top wall 31 of the parasol cup and the inner top wall of the can lid 2. This allows the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21 and the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 to be fully mixed in the mixing chamber. The temperature of the mixed refrigerant decreases, and after impacting the top wall 31 of the parasol cup and scattering, it flows downwards along the side wall 32 of the parasol cup and the inner side wall of the can lid 2 (or can body 1), thereby guiding the mixed refrigerant into the receiving cavity. At the bottom, it mixes with the liquid refrigerant stored at the bottom and evaporates into gaseous refrigerant. On the one hand, it can cool down the mixed refrigerant and avoid excessive superheating of the suction gas. On the other hand, it can effectively utilize the liquid refrigerant stored at the bottom of the receiving cavity. In addition, since the inlet end 41 of the suction pipe 4 is located in the inner area of ​​the umbrella cup side wall 32, it can effectively prevent the mixed refrigerant from being directly sucked into the inlet end 41 of the suction pipe 4 before it has a chance to mix with the liquid refrigerant stored at the bottom of the receiving cavity, and then discharged into the compressor through the outlet end 42 of the suction pipe 4, which would lead to excessive superheating of the compressor suction gas.

[0061] In specific implementation, refer to Figures 7 to 8 , Figures 14 to 15 As shown, an installation through hole 30 can be opened on the top wall 31 of the umbrella cup, and the outlet end 42 of the suction pipe 4 passes through the installation through hole 30 and is connected to the low-pressure outlet 22 on the can lid 2.

[0062] It should be noted that, in specific implementation, the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21 and the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 mix in the mixing chamber and, after impacting the top wall 31 of the umbrella cup and scattering, flow downwards along the side wall 32 of the umbrella cup and the inner wall of the can lid 2 (or can body 1). Part of the mixed gaseous refrigerant, under the suction of the compressor, enters the suction pipe 4 through the inlet end 41 of the suction pipe 4. The other part of the mixed gaseous refrigerant continues to flow downwards and mixes with the liquid refrigerant stored at the bottom of the containment chamber, evaporating the liquid refrigerant into gaseous refrigerant. Under the suction of the compressor, it enters the suction pipe 4 through the inlet end 41 of the suction pipe 4 and is finally drawn out by the compressor through the outlet end 42 of the suction pipe 4.

[0063] To allow the bypass inlet 23 of the gas-liquid separator to be selectively connected to the compressor's exhaust port, in some embodiments, refer to Figure 1 and Figure 2 As shown, a bypass valve 5 is integrated on the gas-liquid separator. Specifically, the bypass inlet 23 may include a first channel section and a second channel section connected to each other. The bypass valve 5 has a valve core located between the first channel section and the second channel section, so that the movement of the valve core can realize the connection or disconnection between the first channel section and the second channel section. When the first channel section and the second channel section are connected, the bypass inlet 23 can be connected to the exhaust port of the compressor. When the first channel section and the second channel section are disconnected, the bypass inlet 23 is not connected to the exhaust port of the compressor.

[0064] Of course, the specific structure of the bypass valve 5 and the bypass inlet 23 is not limited to the above limitations. As long as the bypass valve 5 can be used to selectively connect the bypass inlet 23 to the compressor's exhaust port, it is acceptable.

[0065] In addition, in order to allow the bypass inlet 23 to be selectively connected to the compressor's exhaust port, an independent bypass valve can be installed between the bypass inlet 23 of the gas-liquid separator and the compressor's exhaust port. By opening and closing the bypass valve, the bypass inlet 23 can be connected to or disconnected from the compressor's exhaust port.

[0066] Reference Figures 1 to 7 The diagram shown is a structural schematic of a gas-liquid separator provided in an embodiment of this application; refer to... Figure 8 As shown, Figure 1 The diagram shows the structure of the umbrella cup of the gas-liquid separator. To ensure that the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 can be fully mixed with the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21, in some embodiments, refer to... Figure 4 and Figure 5 As shown, the bypass inlet 23 and the low-pressure inlet 21 are intersected and connected, and the bypass inlet 23 and the low-pressure inlet 21 form a mixing port at the inner top wall of the can cover 2.

[0067] This configuration ensures that the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21 are mixed before entering the mixing chamber, and then mixed again in the mixing chamber. This ensures that the high-temperature, high-pressure refrigerant and the low-temperature, low-pressure refrigerant are mixed more thoroughly.

[0068] In practical implementation, one of the bypass inlet 23 and the low-pressure inlet 21 can be set vertically, while the other can be set at an angle, so that the bypass inlet 23 and the low-pressure inlet 21 intersect and are connected. For example, refer to... Figure 4 and Figure 5 As shown, the low-pressure inlet 21 can be inclined, and the bypass inlet 23 includes a vertical channel section. The inclined low-pressure inlet 21 can intersect and connect with the vertical channel section of the bypass inlet 23, and the lower port of the vertical channel section forms a mixed port. Of course, the low-pressure inlet 21 and the bypass inlet 23 can also form other connecting structures such as a Y-shape.

[0069] It should be understood that in the scheme where the bypass inlet 23 and the low-pressure inlet 21 are intersected and connected, since the bypass inlet 23 and the low-pressure inlet 21 form a mixing port at the inner top wall of the can lid 2, the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21 are mixed before entering the mixing chamber. Therefore, in specific implementations, the height of the mixing chamber formed between the top wall 31 of the umbrella cup and the inner top wall of the can lid 2 can be appropriately reduced to ensure that the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21 are fully mixed. For example, refer to... Figure 4 As shown in the diagram, h1 represents the height of the mixing chamber. The height of the mixing chamber can be set to approximately 5mm, such as 3mm, 4mm, 5mm, 6mm, 7mm, etc. Of course, the height of the mixing chamber can also be reasonably set and adjusted according to the actual situation. By appropriately reducing the height of the mixing chamber, that is, appropriately reducing the height of the gap formed between the top wall 31 of the umbrella cup and the inner top wall of the canister cover 2, the volume of the receiving cavity below the umbrella cup 3 can be increased under the condition that the volume of the gas-liquid separator is fixed, which is conducive to storing more refrigerant.

[0070] In some embodiments, refer to Figure 4 , Figure 5 and Figure 8 As shown, the central region of the umbrella cup top wall 31 protrudes upward relative to the peripheral region of the umbrella cup top wall 31, and the mixing port corresponds vertically to the central region of the umbrella cup top wall 31.

[0071] This configuration allows the mixed refrigerant entering through the mixing port to first collide with the central area of ​​the top wall 31 of the umbrella cup and then disperse outwards, and then collide with the peripheral area of ​​the top wall 31 of the umbrella cup and disperse outwards. This results in the mixed refrigerant flowing downwards in a stepped manner and dispersing outwards around the umbrella cup 3, that is, it disperses outwards while descending. This can improve the flow speed and uniformity of the mixed refrigerant when it disperses outwards.

[0072] Furthermore, by making the central region of the umbrella cup top wall 31 protrude upward relative to the peripheral region of the umbrella cup top wall 31, a stepped structure can be formed in the peripheral region of the umbrella cup top wall 31, so as to facilitate the fixation of the umbrella cup 3 inside the can lid 2 using this stepped structure. Specifically, refer to Figure 7 As shown, a vertically extending mounting protrusion can be provided on the inner wall of the can lid 2, and a first mounting hole 24 is formed on the mounting protrusion. Accordingly, refer to Figure 7 and Figure 8 As shown, a second mounting hole 35 extending vertically is provided on the stepped structure. The stepped structure of the umbrella cup 3 can abut against the mounting protrusion inside the can lid 2. Then, the umbrella cup 3 is fixed on the can lid 2 by fasteners passing through the second mounting hole 35 and the first mounting hole 24.

[0073] In specific implementation, refer to Figure 7 As shown, multiple mounting protrusions can be spaced circumferentially on the inner wall of the can lid 2, and a first mounting hole 24 is opened on each mounting protrusion. The stepped structure can be an annular stepped structure. Accordingly, refer to Figure 7 and Figure 8 As shown, multiple second mounting holes 35 can be provided at intervals along the circumference of the stepped structure to securely fix the umbrella cup 3 to the can lid 2 using multiple fasteners.

[0074] Of course, the fixing structure of the umbrella cup 3 on the can lid 2 is not limited to the above limitations and can be reasonably set according to actual needs. For example, the umbrella cup 3 is provided with a mounting hole 30 for the outlet end 42 of the suction pipe 4 to pass through. The suction pipe 4 and the mounting hole 30 can be fixed by means of tube expansion, thereby fixing the umbrella cup 3 on the suction pipe 4 and also fixing the umbrella cup 3 inside the can lid 2.

[0075] To ensure that the mixed refrigerant is directed to the bottom of the gas-liquid separator's containment chamber, in some embodiments, reference is made to... Figure 4 and Figure 5 As shown, the height of the umbrella cup sidewall 32 is greater than or equal to the second preset height. For example, refer to... Figure 4As shown in the figure, h2 represents the height of the umbrella cup sidewall 32. The second preset height can be 24mm. Specifically, the height of the umbrella cup sidewall 32 can be 24mm, 29mm, 34mm, 39mm, 44mm, etc. Of course, the value of the second preset height is not limited to the above limitation and can be reasonably set according to the actual situation.

[0076] This design ensures that the umbrella cup sidewall 32 has sufficient height to guide the mixed refrigerant to the bottom of the receiving cavity, where it mixes with the liquid refrigerant stored at the bottom of the receiving cavity and evaporates into a gaseous state. This avoids the problem of excessive compressor suction overheating caused by the umbrella cup sidewall 32 being too short, which would result in the mixed refrigerant being directly drawn into the suction pipe 4 by the compressor suction and failing to mix with the liquid refrigerant at the bottom.

[0077] Reference Figures 9 to 14 The diagram shown is a structural schematic of a gas-liquid separator provided in another embodiment of this application; see reference. Figure 15 As shown, Figure 9 The diagram shows the structure of the umbrella cup of the gas-liquid separator. The main difference between this embodiment and the previous embodiment is that the bypass inlet 23 and the low-pressure inlet 21 of the gas-liquid separator are not integrated, but are separately provided. In some embodiments, refer to... Figure 11 As shown, the bypass inlet 23 and the low-pressure inlet 21 are set independently. The bypass inlet 23 forms a bypass port on the inner top wall of the can cover 2, and the low-pressure inlet 21 forms a low-pressure port on the inner top wall of the can cover 2.

[0078] This configuration allows the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21 to enter the mixing chamber without interference. In other words, they are not mixed before entering the mixing chamber, but are mixed after entering the mixing chamber. The mixing chamber can also act as a sound-absorbing chamber, thereby effectively reducing the noise generated during refrigerant mixing. Furthermore, the independent configuration of the bypass inlet 23 and the low-pressure inlet 21 results in a simpler structure and lower manufacturing costs.

[0079] In practical implementation, the low-pressure inlet 21 can extend vertically, with its lower end forming a low-pressure port. The bypass inlet 23 includes at least a vertically extending channel section, with its lower end forming a bypass port. This arrangement ensures that both the low-temperature, low-pressure refrigerant entering through the low-pressure inlet 21 and the high-temperature, high-pressure refrigerant entering through the bypass inlet 23 enter the mixing chamber in a parallel, vertical manner. Of course, to achieve better refrigerant mixing, the entry direction of the bypass inlet 23 and the entry direction of the low-pressure inlet 21 can be set at an angle.

[0080] To ensure thorough mixing of the high-temperature, high-pressure refrigerant entering through bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through low-pressure inlet 21, in some embodiments, refer to Figure 11 , Figure 13 , Figure 14 and Figure 15 As shown, the upper surface of the umbrella cup top wall 31 is provided with a first flow guiding protrusion 33 and a second flow guiding protrusion 34. The first flow guiding protrusion 33 corresponds vertically to the bypass port, and the second flow guiding protrusion 34 corresponds vertically to the low-pressure port.

[0081] With this configuration, the guiding effect of the first guide protrusion 33 and the second guide protrusion 34 can be used to make the high-temperature and high-pressure refrigerant entering through the bypass inlet 23 and the low-temperature and low-pressure refrigerant entering through the low pressure more fully mixed.

[0082] In specific implementation, refer to Figure 11 and Figure 15 As shown, both the first guide protrusion 33 and the second guide protrusion 34 can be conical protrusions, and the conical protrusions form a structure that is smaller at the top and larger at the bottom, so that when the high-temperature and high-pressure refrigerant entering through the bypass inlet 23 impacts the first guide protrusion 33 on the top wall 31 of the umbrella cup, it can spread outwards. Correspondingly, when the low-temperature and low-pressure refrigerant entering through the low-pressure inlet 21 impacts the second guide protrusion 34 on the top wall 31 of the umbrella cup, it can spread outwards, thereby enabling the high-temperature and high-pressure refrigerant and the low-temperature and low-pressure refrigerant to mix better.

[0083] It should be understood that in the scheme where bypass inlet 23 and low-pressure inlet 21 are set independently, the high-temperature, high-pressure refrigerant entering through bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through low-pressure inlet 21 are not mixed before entering the mixing chamber, but are mixed after entering the mixing chamber. Therefore, to ensure the mixing effect of the high-temperature, high-pressure refrigerant entering through bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through low-pressure inlet 21, the height of the mixing chamber needs to be appropriately increased compared to the scheme where bypass inlet 23 and low-pressure inlet 21 are arranged in a cross-connected manner.

[0084] To ensure the mixing effect of the high-temperature, high-pressure refrigerant entering through bypass inlet 23 and the low-temperature, low-pressure refrigerant entering through low-pressure inlet 21, in some embodiments, reference is made to... Figure 11 and Figure 13 As shown, the height of the mixing chamber is greater than or equal to a first preset height. For example, refer to... Figure 11 As shown in the figure, h3 represents the height of the mixing chamber. The first preset height can be 15mm. Specifically, the height of the mixing chamber can be 15mm, 20mm, 25mm, 30mm, 35mm, etc. Of course, the value of the first preset height is not limited to the above limitation and can be reasonably set according to the actual situation.

[0085] This configuration ensures sufficient height space in the mixing chamber, allowing for thorough mixing of the high-temperature, high-pressure refrigerant entering via bypass inlet 23 and the low-temperature, low-pressure refrigerant entering via low-pressure inlet. Furthermore, the sufficient height space in the mixing chamber also enables effective noise reduction, minimizing the noise generated during the mixing of the high-temperature, high-pressure and low-temperature, low-pressure refrigerants.

[0086] To ensure that the mixed refrigerant is directed to the bottom of the gas-liquid separator's containment chamber, in some embodiments, reference is made to... Figure 11 and Figure 13 As shown, the height of the umbrella cup sidewall 32 is greater than or equal to the second preset height. For example, refer to... Figure 11 As shown in the figure, h4 represents the height of the umbrella cup sidewall 32. The second preset height can be 24mm. Specifically, the height of the umbrella cup sidewall 32 can be 24mm, 29mm, 34mm, 39mm, 44mm, etc. Of course, the value of the second preset height is not limited to the above limitation and can be reasonably set according to the actual situation.

[0087] This design ensures that the umbrella cup sidewall 32 has sufficient height to guide the mixed refrigerant to the bottom area of ​​the receiving cavity, where it mixes with the liquid refrigerant stored at the bottom of the receiving cavity and evaporates into a gaseous state. This avoids the problem of excessive compressor suction overheating caused by the umbrella cup sidewall 32 being too short, which would result in the mixed refrigerant being directly drawn into the suction pipe 4 by the compressor suction and failing to mix with the liquid refrigerant at the bottom.

[0088] It should be noted that, in order to enable the refrigerant entering the mixing chamber to flow downward and disperse better after impacting the top wall 31 of the umbrella cup, the central region of the top wall 31 of the umbrella cup can be set to protrude upward relative to the peripheral region of the top wall 31 of the umbrella cup, and the low-pressure port and the bypass port are vertically aligned with the central region of the top wall 31 of the umbrella cup.

[0089] In some embodiments, refer to Figure 7 , Figure 13 and Figure 14 As shown, the intake pipe 4 includes an intake channel section 43 and an exhaust channel section 44; both the intake channel section 43 and the exhaust channel section 44 extend vertically, and the bottom of the intake channel section 43 and the bottom of the exhaust channel section 44 are connected. The top of the intake channel section 43 forms an inlet end 41, and the top of the exhaust channel section 44 forms an outlet end 42. One of the intake channel section 43 and the exhaust channel section 44 has an oil return hole 45 at its bottom; wherein, the inlet area of ​​the inlet end 41 is less than or equal to the outlet area of ​​the outlet end 42.

[0090] It should be understood that the oil return hole 45 is where the oil at the bottom of the gas-liquid separator enters the suction pipe 4. Under the suction of the compressor, the liquid refrigerant is rapidly vaporized and carried into the compressor along with the oil.

[0091] By setting the inlet area of ​​inlet 41 to be smaller than the outlet area of ​​outlet 42, an obstruction can be added to the inlet 41 of suction pipe 4, creating a difference between the inlet area of ​​inlet 41 and the outlet area of ​​outlet 42. Under the suction of the compressor, the difference between the inlet area of ​​inlet 41 and the outlet area of ​​outlet 42 leads to a pressure difference, which increases the flow rate of liquid refrigerant at the bottom of the cavity into suction pipe 4 through oil return hole 45. This liquid refrigerant mixes with the gaseous refrigerant entering suction pipe 4 and cools it down, thereby cooling the gaseous refrigerant and preventing the refrigerant discharged from outlet 42 of suction pipe 4 to the compressor from being too hot.

[0092] In some embodiments, refer to Figure 4 , Figure 5 and Figure 7 As shown, the bottom of the suction pipe 4 is provided with an oil return cover 6, which covers the outer periphery of the oil return hole 45. The wall of the oil return cover 6 is provided with a filter screen. The oil stored at the bottom of the accommodating cavity can be filtered by the filter screen of the oil return cover 6 and then enter the suction pipe 4 through the oil return hole 45.

[0093] In some embodiments, refer to Figure 4 , Figure 5 and Figure 7 As shown, the gas-liquid separator's receiving cavity is also equipped with a filter structure. The filter structure is located below the umbrella cup 3. The inlet end 41 of the suction pipe 4 passes through the filter structure and extends above it. There is a gap between the inlet end 41 of the suction pipe 4 and the lower surface of the umbrella cup top wall 31, so that the refrigerant entering the receiving cavity is first filtered by the filter structure and then drawn into the suction pipe 4 through the inlet end 41. The function of the filter structure is to filter impurities and ensure even flow. Specifically, the filter structure can use a double-layer filter 7 to better improve the filtration effect.

[0094] In some embodiments, refer to Figure 4 , Figure 5 and Figure 7 As shown, the gas-liquid separator's receiving cavity is also equipped with a partition plate 8, located below the umbrella cup 3 and the filter screen structure. The partition plate 8 can be fitted onto the suction pipe 4. The function of the partition plate 8 is to suppress liquid flow, prevent sudden boiling, and rectify the refrigerant. The number of partition plates 8 is not limited to one; there can be two or more. When multiple partition plates 8 are used, they can be arranged sequentially at intervals along the vertical direction.

[0095] Of course, in specific implementations, the partition plate 8 is not limited to being installed in the receiving cavity; other types of structures can also be used to replace it. For example, a Z-shaped baffle can be installed in the receiving cavity to change the flow direction of the fluid, increase the flow path, and reduce the flow velocity. A cylindrical guide tube can also be installed in the receiving cavity to guide the fluid to flow uniformly and reduce flow resistance. Irregularly shaped channels, such as S-shaped channels, can also be installed in the receiving cavity to increase the flow path, limit the flow velocity, and reduce flow resistance. A honeycomb structure flow channel can also be installed in the receiving cavity to uniformly distribute the fluid and prevent excessively high local flow velocities.

[0096] In some embodiments, at least one of the low-pressure inlet 21, low-pressure outlet 22, and bypass inlet 23 of the gas-liquid separator may be provided with a gradually increasing opening size, and the opening size of the gradually increasing opening size gradually increases along the refrigerant flow direction, so as to avoid sudden changes in refrigerant flow rate and thereby reduce noise generation.

[0097] Other embodiments of this application provide a heat pump air conditioning system, including a compressor and a gas-liquid separator as described in any of the above embodiments, wherein the bypass inlet 23 of the gas-liquid separator is selectively connected to or disconnected from the exhaust port of the compressor.

[0098] It should be noted that, in order to selectively connect or disconnect the bypass inlet 23 of the gas-liquid separator from the compressor's exhaust port, a bypass valve 5 can be integrated into the gas-liquid separator. The operation of the bypass valve 5 controls the connection or disconnection between the bypass inlet 23 of the gas-liquid separator and the compressor's exhaust port. Alternatively, an independent bypass valve can be installed between the bypass inlet 23 of the gas-liquid separator and the compressor's exhaust port, allowing the connection or disconnection of the bypass inlet 23 to the compressor's exhaust port to be achieved through the opening and closing of the bypass valve.

[0099] It should be noted that the heat pump air conditioning system provided in this application embodiment includes, in addition to the compressor and gas-liquid separator mentioned above, other modules or components that enable the heat pump air conditioning system to work normally. These can be reasonably set according to actual conditions and are not specifically limited here.

[0100] Further embodiments of this application provide a vehicle including the heat pump air conditioning system as described above.

[0101] The vehicle provided in the above embodiments of this application has the beneficial effects of the heat pump air conditioning system of any of the above embodiments because it includes the heat pump air conditioning system of any of the above embodiments, which will not be repeated here.

[0102] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0103] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-liquid separator, characterized by, The application relates to a canister, which comprises: a canister body (1); a canister cover (2) arranged on the top of the canister body (1) and forming a containing cavity together with the canister body (1), wherein a low-pressure inlet (21), a low-pressure outlet (22) and a bypass inlet (23) are arranged on the canister cover (2); an umbrella cup (3) arranged below the canister cover (2) and comprising an umbrella cup top wall (31) and an umbrella cup side wall (32) connected with the peripheral edge of the umbrella cup top wall (31), wherein a mixing chamber is formed between the umbrella cup top wall (31) and the inner top wall of the canister cover (2), the low-pressure inlet (21) and the bypass inlet (23) are both communicated with the mixing chamber, a flow-through gap is formed between the umbrella cup side wall (32) and the inner side wall of the canister cover (2) or between the umbrella cup side wall (32) and the inner side wall of the canister body (1), and the flow-through gap is communicated with the mixing chamber and the containing cavity below the umbrella cup (3); an air suction pipe (4) arranged in the containing cavity, wherein the air suction pipe (4) has an inlet end (41) and an outlet end (42), the inlet end (41) is located in the inner peripheral area of the umbrella cup side wall (32) and is communicated with the containing cavity, and the outlet end (42) penetrates through the umbrella cup top wall (31) and is communicated with the low-pressure outlet (22).

2. The gas-liquid separator of claim 1, wherein, The bypass inlet (23) and the low-pressure inlet (21) are arranged in a cross and communication mode, the bypass inlet (23) and the low-pressure inlet (21) form a mixing port at the inner top wall of the canister cover (2).

3. The gas-liquid separator of claim 2, wherein, The middle area of the umbrella cup top wall (31) is convex upward relative to the peripheral edge area of the umbrella cup top wall (31), and the mixing port corresponds to the middle area of the umbrella cup top wall (31) upward and downward.

4. The gas-liquid separator of claim 1, wherein, The bypass inlet (23) and the low-pressure inlet (21) are arranged in a mutual independent mode, the bypass inlet (23) forms a bypass port at the inner top wall of the canister cover (2), and the low-pressure inlet (21) forms a low-pressure port at the inner top wall of the canister cover (2).

5. The gas-liquid separator of claim 4, wherein, The upper surface of the umbrella cup top wall (31) is provided with a first flow guide convex part (33) and a second flow guide convex part (34), the first flow guide convex part (33) corresponds to the bypass port upward and downward, and the second flow guide convex part (34) corresponds to the low-pressure port upward and downward.

6. The gas-liquid separator of claim 4, wherein, The height of the mixing chamber is greater than or equal to a first preset height.

7. The gas-liquid separator of claim 1, wherein, The height of the umbrella cup side wall (32) is greater than or equal to a second preset height.

8. The gas-liquid separator of claim 1, wherein, The air suction pipe (4) comprises an air inlet channel section (43) and an air outlet channel section (44). The air inlet channel section (43) and the air outlet channel section (44) both extend along the vertical direction, the bottom of the air inlet channel section (43) and the bottom of the air outlet channel section (44) are communicated, the top of the air inlet channel section (43) forms the inlet end (41), the top of the air outlet channel section (44) forms the outlet end (42), the inlet area of the inlet end (41) is less than or equal to the outlet area of the outlet end (42), and the bottom of one of the air inlet channel section (43) and the air outlet channel section (44) is provided with an oil return hole (45).

9. A heat pump air conditioning system characterised in that, A gas-liquid separator according to any one of claims 1 to 8, wherein a bypass inlet (23) of said gas-liquid separator is arranged in selective communication or disconnection with a discharge port of said compressor.

10. A vehicle characterized by comprising: A heat pump air conditioning system according to claim 9.

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