Gas-liquid separator, compressor assembly and air conditioner having the same

Abstract

The present application provides a gas-liquid separator, a compressor assembly, and an air conditioner having the same, comprising a housing, an air outlet passage, and a connecting pipe. The air outlet passage can be connected to the air intake of the compressor; the connecting pipe can guide the gas in the housing to flow out through the air outlet passage; the connecting pipe includes a first pipe and a second pipe; the resonant frequency of the first pipe is the same as the operating frequency of the compressor; the second pipe has a different operating frequency from the compressor; and the air outlet passage can switch between connecting to the first pipe or the second pipe. According to the gas-liquid separator of the present application, the compressor can simultaneously maintain excellent cooling and heating capabilities.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioners, and in particular relates to a gas-liquid separator, a compressor assembly, and an air conditioner having the same. Background Art

[0002] Currently, air conditioning systems use compressors equipped with gas-liquid separators. These separators typically consist of a filter, support, baffle, straight pipe, connecting pipe, elbow, and cylinder, performing three main functions: filtering, storing liquid, and stabilizing pressure.

[0003] For air conditioning systems with both cooling and heating functions, the accumulator components are typically designed primarily for cooling applications. However, in heating applications, the operating conditions differ significantly from those in cooling applications due to the drop in suction pressure and the increase in pressure ratio. This weakens the accumulator's suction capacity and reduces the compressor's heating capacity. Often, to ensure heating capacity meets system requirements, a compressor with greater cooling capacity than required is used, resulting in excess capacity and impacting system volume control and piping optimization. This phenomenon is particularly pronounced when a compressor with enthalpy-increasing capabilities is used in an air conditioning system, preventing the compressor from achieving optimal performance.

[0004] Therefore, how to provide a gas-liquid separator, a compressor assembly and an air conditioner having the same that can enable the compressor to simultaneously ensure good cooling and heating capabilities has become a problem that technicians in this field urgently need to solve. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present application is to provide a gas-liquid separator, a compressor assembly and an air conditioner having the same, which can enable the compressor to simultaneously ensure good cooling and heating capabilities.

[0006] In order to solve the above problems, the present application provides a gas-liquid separator, comprising:

[0007] case;

[0008] An air outlet channel, the air outlet channel being able to communicate with an air intake port of the compressor;

[0009] The connecting pipe can guide the gas in the shell to flow out through the air outlet channel; the connecting pipe includes a first pipe and a second pipe; the resonance frequency of the first pipe is the same as the operating frequency of the compressor; the second pipe is different from the operating frequency of the compressor; and the air outlet channel can switch between connecting with the first pipe or the second pipe.

[0010] Furthermore, the diameter of the first tube is D21; the diameter of the second tube is D22; wherein D21 <D22;

[0011] And / or, the length of the first tube is L21, and the length of the second tube is L22; wherein L22 <L21。

[0012] Further, 1.2*D21≤D22≤1.4*D21; and / or, 0.65*L21≤L22≤0.85*L21.

[0013] Furthermore, the gas-liquid separator also includes a switching mechanism, which has a switching cavity connected to the gas outlet channel; the switching cavity can be switched between being connected to the first tube or the second tube.

[0014] Furthermore, the switching mechanism also includes a movable structure; the switching chamber has a first connecting port and a second connecting port, the first tube is connected to the first connecting port, and the second tube is connected to the second connecting port; the movable structure can move in the switching chamber to block the first connecting port or the second connecting port, thereby allowing the switching chamber to switch between connecting to the first tube or the second tube.

[0015] Furthermore, the movable structure has a through hole. When the movable structure blocks the first connecting port, the through hole connects the second connecting port and the air outlet channel; when the movable structure blocks the second connecting port, the through hole connects the first connecting port and the air outlet channel.

[0016] Furthermore, the through hole includes a first section and a second section connected in sequence in the axial direction; the aperture of the first section is smaller than the aperture of the second section; the first section can be connected to the first connecting port or the second connecting port, and the second section is connected to the air outlet channel.

[0017] Furthermore, the switching cavity also has a vent; the gas introduced into the vent can push the movable structure to move in the switching cavity.

[0018] Furthermore, the vent includes a first vent and a second vent, the first vent can be passed into the first gas, the second vent can be passed into the second gas, and the gas pressure of the first gas is different from the gas pressure of the second gas to promote the movable structure to move in the switching cavity.

[0019] Furthermore, the gas-liquid separator also includes an air supply pipeline, which includes a main pipe, a first branch pipe, a second branch pipe and an air pressure regulating device. The first end of the main pipe is connected to the air supply device, the second end of the main pipe is connected to the first branch pipe and the second branch pipe, and the first branch pipe is connected to the first air vent, and the second branch pipe is connected to the second air vent; the gas in the first branch pipe forms a first gas, and the gas in the second branch pipe forms a second gas. The air pressure regulating device can adjust the gas pressure in the first branch pipe and / or the second branch pipe so that the gas pressure of the first gas is different from the gas pressure of the second gas.

[0020] Furthermore, the gas-liquid separator also includes an outlet pipe, which forms an outlet channel; the outlet pipe includes an inner section and an outer section, the inner section is located inside the shell, and the outer section extends outside the shell; the inner diameter of the shell cross section is φD10z; the diameter of the first section is φD42u; the diameter of the second section is φD42d; the inner diameter of the outlet pipe is φD3; the distance between the central axis of the second pipe and the central axis of the shell is S22; the distance between the central axis of the first pipe and the central axis of the shell is S21; in the movable direction of the movable structure, the distance between the central axis of the first section and the position of the movable structure near the first vent is L42a, and the distance between the central axis of the first section and the position of the movable structure near the second vent is L42b;

[0021] Among them, L42a+D42d / 2≥D10z / 2+D3 / 2;

[0022] and / or, L42b+D42d / 2≥D10z / 2+D3 / 2;

[0023] and / or, L42a+D42u / 2≥D22 / 2+S22+D10z / 2;

[0024] and / or, L42b+D42u / 2≥D21 / 2+S21+D10z / 2;

[0025] and / or, L42a+L42b≥D10z / 2+S21+D21 / 2;

[0026] and / or, L42a+L42b≥D10z / 2+S22+D22 / 2;

[0027] and / or, L42a+D42d / 2≤D10z / 2+S21-D21 / 2;

[0028] and / or, L42b+D42d / 2≤D10z / 2+S22-D22 / 2;

[0029] and / or, D22 / 2+D21 / 2≤S22+S21;

[0030] and / or, D42u≥D22>D21.

[0031] Furthermore, the gas-liquid separator also includes an oil leakage hole, and the lubricating oil in the shell can enter the gas outlet channel through the oil leakage hole.

[0032] Furthermore, when the gas-liquid separator further includes a switching mechanism and an outlet pipe, the switching mechanism is arranged in the axial middle portion of the shell, and the oil leakage hole is arranged on the outlet pipe;

[0033] Alternatively, when the gas-liquid separator further includes a switching mechanism, the switching mechanism is arranged at the bottom of the shell, and the oil leakage hole is opened on the connecting pipe.

[0034] According to another aspect of the present application, a compressor assembly is provided, including a gas-liquid separator and a compressor body, wherein the gas-liquid separator is the gas-liquid separator described above; an air outlet channel of the gas-liquid separator is connected to an air intake port of the compressor body.

[0035] According to another aspect of the present application, an air conditioner is provided, comprising a compressor assembly, which is the above-mentioned compressor assembly.

[0036] Furthermore, when the air conditioner is in a heating state, the air outlet passage is switched to communicate with the first pipe; and / or, when the air conditioner is in a cooling state, the air outlet passage is switched to communicate with the second pipe.

[0037] Furthermore, the air conditioner also includes a four-way valve, a first heat exchanger, a throttling component, a second heat exchanger and an enthalpy increasing component connected in sequence; when the gas-liquid separator also includes a switching mechanism, the switching mechanism includes a movable structure, the switching mechanism has a switching chamber, the switching chamber also has an air vent, and the air vent includes a first air vent and a second air vent, the exhaust port of the enthalpy increasing component is connected to the first air vent; the second air vent can switch between being connected to the first heat exchanger or the second heat exchanger to adjust the pressure difference between the first gas in the first air vent and the second gas in the second vent, thereby driving the movable structure to move in the switching chamber, so that the air outlet channel is connected to the first pipe or the second pipe.

[0038] The gas-liquid separator, compressor assembly and air conditioner provided by the present application are capable of switching the air outlet channel of the gas-liquid separator of the present application between being connected to the first pipe or the second pipe. When the compressor is running, for conventional refrigeration operation conditions, the gas outlet channel is switched to the second pipe connected to the compressor suction port to meet sufficient suction volume, ensure refrigeration capacity, and avoid the resonance of the gas-liquid separator affecting the vibration of the compressor and generating noise. When heating is required for low-temperature operation conditions, the gas-liquid separator is switched to the first pipe connected to the compressor suction port. At this time, since the connecting pipe will resonate with the suction, causing more obvious suction pulsation, the suction volume can be greatly increased, and the heating capacity under low-temperature conditions is improved. The gas-liquid separator, compressor assembly and air conditioner provided by the present application can enable the compressor to simultaneously ensure good cooling and heating capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the structure of the gas-liquid separator in this application;

[0040] Figure 2 Schematic diagram of the structure of the switching mechanism in this application;

[0041] Figure 3Schematic diagram of the structure of the switching mechanism in this application;

[0042] Figure 4 Four views of the active structure in this application;

[0043] Figure 5 A schematic diagram of the structure of the activity structure in this application;

[0044] Figure 6 This is a schematic diagram of the structure of the air conditioner in the cooling state in this application;

[0045] Figure 7 This is a schematic diagram of the structure of the air conditioner in the heating state in this application;

[0046] Figure 8 Schematic diagram of the structure of a gas-liquid separator in the related art;

[0047] Figure 9 It is a structural schematic diagram of a compressor assembly in the related art;

[0048] Figure 10 A comparison chart of different operating conditions and operating ranges of compressors in this application and related technologies;

[0049] Figure 11 This is a comparison chart of the cooling and heating capacities of the gas-liquid separators of this application and related technologies.

[0050] The reference numerals indicate:

[0051] 1. Shell; 2. Connecting pipe; 21. First pipe; 22. Second pipe; 3. Outlet pipe; 4. Switching mechanism; 41. Switching chamber; 411. First connecting port; 412. Second connecting port; 413. Vent; 4131. First vent; 4132. Second vent; 42. Movable structure; 421. Through hole; 4211. First section; 4212. Second section; 51. Compressor; 511. Exhaust pipe; 52. Four-way valve; 53. First heat exchanger; 54. Throttling component; 55. Enthalpy increasing component; 56. Flash evaporator; 57. Control valve; 58. Second heat exchanger; 6. Filter; 7. Support; 8. Inlet pipe; 9. Partition. DETAILED DESCRIPTION

[0052] See also Figure 1-10 As shown, a gas-liquid separator includes a shell 1, an air outlet channel and a connecting pipe 2, the air outlet channel can be connected to the air intake of the compressor 51; the connecting pipe 2 can guide the gas in the shell 1 to flow out through the air outlet channel; the connecting pipe 2 includes a first pipe 21 and a second pipe 22; the resonance frequency of the first pipe 21 is the same as the operating frequency of the compressor 51; the second pipe 22 is different from the operating frequency of the compressor 51; and the air outlet channel can switch between being connected to the first pipe 21 or the second pipe 22.

[0053] Refer to in combination Figure 8-9 , a gas-liquid separator and a compressor 51 in the prior art. There is only one connecting pipe 2 in the gas-liquid separator. Compared with the above prior art, the air outlet channel of the gas-liquid separator of the present application can be switched between being connected to the first pipe 21 or the second pipe 22. When the compressor 51 operates, for the conventional refrigeration operating condition, it is switched to the second pipe 22 to be connected to the suction port of the compressor 51 to meet sufficient suction volume, ensure refrigeration capacity, and avoid the resonance of the gas-liquid separator affecting the vibration of the compressor 51 and generating noise. When heating is required under the low-temperature operating condition, it is switched to the first pipe 21 to be connected to the suction port of the compressor 51. At this time, since the connecting pipe 2 will resonate with the suction, causing obvious suction pulsation, the suction volume can be greatly increased, and the heating capacity under low-temperature conditions can be improved. The gas-liquid separator of the present application can be optimized respectively during refrigeration and heating applications, improve the heating capacity of the compressor 51, reduce the displacement requirement of the compressor 51 for the air-conditioning system, and facilitate the optimization of the air-conditioning system in terms of space, cost, and energy consumption. The present application solves the problem that when the design of the gas-liquid separator is optimized for the refrigeration capacity of the compressor 51, the heating capacity is insufficient.

[0054] Refer to in combination Figure 1 As shown, the present application also discloses some embodiments. The inner diameter of the first pipe 21 is D21; the inner diameter of the second pipe 22 is D22; wherein, D21 < D22.

[0055] The present application also discloses some embodiments. The length of the first pipe 21 is L21, and the length of the second pipe 22 is L22; wherein, L22 < L21. Through a large number of studies and creative experiments, the inventors know that the resonance frequency of the gas-liquid separator is related to the operating conditions of the compressor 51, the inner diameter of the connecting pipe 2, the length of the connecting pipe 2, etc. Therefore, the present application restricts the resonance frequency by restricting the inner diameter and length of the first pipe 21 and the second pipe 22. The operating conditions determine the operating frequency of the compressor 51. When the resonance frequency is very close to the operating frequency of the compressor 51, it falls within the operating range of the compressor 51, otherwise it is outside the operating range. And when the resonance has the greatest impact, the resonance frequency and the operating frequency of the compressor 51 are in a 1x frequency relationship, and the 2x and higher frequencies are less. Therefore, the present application can set the resonance frequency of the first pipe 21 to be in a 1x frequency relationship with the operating frequency of the compressor 51.

[0056] The present application also discloses some embodiments. 1.2*D21 ≤ D22 ≤ 1.4*D21; and / or, 0.65*L21 ≤ L22 ≤ 0.85*L21.

[0057] Experimental verification shows that the inner diameter and length of the connecting pipe 2 of the gas-liquid separator can affect the resonant frequency of the gas-liquid separator. The first pipe 21 needs to make the resonant frequency of the gas-liquid separator in this working state comparable to the operating frequency of the compressor 51 under low-temperature heating conditions, thereby generating suction pulsation to increase the heating capacity and enable the system to quickly transport heat. Because the operating frequency of low-temperature heating is close to the operating frequency of maximum cooling, to avoid resonance problems in cooling, the resonant frequency of the short connecting pipe 2 design needs to be significantly increased. However, shortening the connecting pipe 2 will cause the effective volume of the gas-liquid separator in this working state to decrease. Therefore, after extensive creative research and experimental verification, and in combination with the commonly used cooling and heating conditions of air conditioners, the inventors have determined that the inner diameter φD22 of the second pipe 22 and the inner diameter φD21 of the first pipe 21 optimally satisfy the following relationship: 1.2*D21<=D22<=1.4*D21, 0.65*L21<=L22<=0.85*L21. The connecting pipe 2 can be a steel pipe.

[0058] The present application also discloses certain embodiments, in which the gas-liquid separator further includes a switching mechanism 4 having a switching chamber 41 connected to the air outlet passage; the switching chamber 41 can switch between connecting to the first tube 21 or the second tube 22. Specifically, in heating mode, when the switching chamber 41 connects to the first tube 21, the first tube 21 connects to the air outlet passage, i.e., the first tube 21 connects to the air intake of the compressor 51. At this time, the connecting tube 2 resonates with the intake air, causing significant intake pulsation, which can significantly increase the intake volume and improve heating capacity under low-temperature conditions. In cooling mode, when the switching chamber 41 connects to the second tube 22, the second tube 22 connects to the air outlet passage, i.e., the second tube 22 connects to the air intake of the compressor 51. This provides sufficient intake volume, ensures cooling capacity, and prevents the resonance of the gas-liquid separator from affecting the vibration and noise of the compressor 51.

[0059] The present application also discloses some embodiments, in which the switching mechanism 4 further includes a movable structure 42; the switching chamber 41 has a first connecting port 411 and a second connecting port 412, the first tube 21 is connected to the first connecting port 411, and the second tube 22 is connected to the second connecting port 412; the movable structure 42 can move in the switching chamber 41 to block the first connecting port 411 or the second connecting port 412, thereby enabling the switching chamber 41 to switch between connecting to the first tube 21 or the second tube 22. In the present application, the movable structure 42 moves in the movable cavity, so that the switching cavity 41 switches between being connected to the first tube 21 or the second tube 22, and further the air outlet channel switches between being connected to the first tube 21 or the second tube 22; thereby, for conventional refrigeration operation conditions, the system switches to the second tube 22 to connect to the air intake of the compressor 51, satisfies sufficient air intake volume, ensures refrigeration capacity, and avoids the resonance of the gas-liquid separator affecting the vibration and noise of the compressor 51; when heating is required for low-temperature operation conditions, the system switches to the first tube 21 to connect to the air intake of the compressor 51. At this time, since the connecting tube 2 will resonate with the air intake, causing more obvious air intake pulsation, the air intake volume can be greatly increased, thereby improving the heating capacity under low-temperature conditions. The movable structure 42 moves within the movable cavity to block the first communication port 411 or the second communication port 412. When the first communication port 411 is blocked, the second communication port 412 is opened, and the second tube 22 is connected to the switching cavity 41 and the air outlet passage through the communication port. When the second communication port 412 is blocked, the first communication port 411 is opened, and the first tube 21 is connected to the switching cavity 41 and the air outlet passage through the communication port. The switching mechanism 4 of the present application has a simple structure and a flexible switching method. The movable structure 42 can also be driven by an external force such as a motor or a user.

[0060] The present application also discloses some embodiments, wherein the movable structure 42 has a through hole 421. When the movable structure 42 blocks the first communication port 411, the through hole 421 connects the second communication port 412 with the air outlet channel; when the movable structure 42 blocks the second communication port 412, the through hole 421 connects the first communication port 411 with the air outlet channel. Figure 3 As shown, when the movable structure 42 moves to the first position, one end of the through hole 421 is at least partially facing the first communication port 411, and the other end is at least partially facing the air outlet channel, so that the through hole 421 connects the first communication port 411 and the air outlet channel; Figure 2 As shown, when the movable structure 42 moves to the second position, one end of the through hole 421 at least partially faces the second communication port 412, and the other end at least partially faces the air outlet channel, so that the through hole 421 connects the second communication port 412 and the air outlet channel.

[0061] In addition to the circular tube structure shown in the drawings, the connecting tube 2 may also have other cross-sectional shapes. Accordingly, the cross-sectional shapes of the connecting opening of the switching mechanism and the through hole 421 on the movable structure 42 may also be of other shapes. However, the size and positional relationships between the cross-sectional shapes must still satisfy the relationships in the present application.

[0062] The present application also discloses some embodiments, wherein the through hole 421 includes a first section 4211 and a second section 4212 that are sequentially connected in the axial direction; the aperture of the first section 4211 is smaller than the aperture of the second section 4212; the first section 4211 can be connected to the first communication port 411 or the second communication port 412, and the second section 4212 is connected to the air outlet channel. Figure 2-5 As shown, this enables the second section 4212 to be connected to the air outlet channel regardless of the movable structure 42 moving to any position; that is, regardless of whether the movable structure 42 moves to the first position or the second position, one end of the through hole 421 is facing the first connecting port 411 or the second connecting port 412, and the other end can partially face the air outlet channel, so that the through hole 421 is always connected to the air outlet channel.

[0063] The present application also discloses some embodiments in which the switching chamber 41 further includes a vent 413; the gas introduced into the vent 413 can propel the movable structure 42 to move within the switching chamber 41. In the present application, the gas introduced into the vent 413 applies force to the movable structure 42, causing the movable structure 42 to move within the switching chamber 41, thereby achieving a switching effect. In this way, the present application can connect the vent 413 to a certain path of a heat exchange system, such as an air conditioning system, so that the outlet channel can switch between connecting to the first pipe 21 or the second pipe 22 according to the operating conditions of the heat exchange system.

[0064] See also Figure 2-4As shown, the present application also discloses some embodiments, wherein the vent 413 includes a first vent 4131 and a second vent 4132. A first gas can be introduced into the first vent 4131, and a second gas can be introduced into the second vent 4132. The gas pressure of the first gas is different from the gas pressure of the second gas, so as to drive the movable structure 42 to move within the switching chamber 41. The pressure difference generated by the gas introduced into the first vent 4131 and the second vent 4132 causes the gas outlet channel to switch between being connected to the first tube 21 or the second tube 22. The first vent 4131 and the second vent 4132 are respectively arranged at both ends of the line connecting the first connecting port 411 and the second connecting port 412. The first vent 4131 and the second vent 4132 can be arranged on the housing 1 of the gas-liquid separator; thereby, the pipeline for introducing gas can be directly connected to the switching chamber 41 from the outside of the housing 1 of the gas-liquid separator. That is, the switching mechanism 4 further includes a first cover plate and a second cover plate, which are arranged inside the housing 1 and enclosed with the inner wall of the housing 1 to form a switching cavity 41. Figure 4 In the figure, port a refers to the second air vent 4132, and port b refers to the first air vent 4131; the first air vent 4131 and the second air vent 4132 are arranged on the shell 1 of the gas-liquid separator; the movable structure 42 is a strip structure, and the shapes of the two end faces of the strip structure are adapted to the inner wall of the shell 1.

[0065] The present application also discloses some embodiments, wherein the gas-liquid separator further comprises an air supply pipeline, the air supply pipeline comprising a main pipe, a first branch pipe, a second branch pipe, and an air pressure regulating device. The first end of the main pipe is connected to the air supply device, the second end of the main pipe is connected to the first branch pipe and the second branch pipe, the first branch pipe is connected to the first vent 4131, and the second branch pipe is connected to the second vent 4132. The gas in the first branch pipe forms a first gas, and the gas in the second branch pipe forms a second gas. The air pressure regulating device is capable of regulating the gas pressure in the first branch pipe and / or the second branch pipe so that the gas pressure of the first gas is different from the gas pressure of the second gas. That is, with the second vent 4132 as port a and the first vent 4131 as port b, in addition to the enthalpy-increasing compressor 51 and its air conditioning system, by connecting a set of pipes capable of switching gas communication pressures to ports a and b of the switching mechanism 4, the gas connected between ports a and b can achieve a pressure conversion difference and achieve the heating capacity improvement effect described in the present application, thereby extending the effect to the application of a conventional compressor 51 and a cooling and heating air conditioning system. The gas pressure regulating device may be a throttling device, such as a capillary tube, an expansion valve, etc. A first throttling device may be provided on the first branch pipe, while no throttling device may be provided on the second branch pipe. That is, the gas pressure in the first branch pipe is lower than the gas pressure in the main pipe, while the gas pressure in the second branch pipe is equal to the gas pressure in the main pipe. This results in different pressures of the gas flowing out of the first branch pipe and the second branch pipe, forming a pressure differential to drive the movable structure 42 to move in the switching chamber 41. Alternatively, a first throttling device may be provided on the first branch pipe, while a second throttling device may be provided on the second branch pipe. The throttling capacity or opening of the first throttling device may be different from the throttling capacity or opening of the second throttling device, thereby causing different gas pressures in the first branch pipe and the second branch pipe, forming a pressure differential. This results in different pressures of the gas entering port a and port b, thereby driving the movable structure 42 to move in the switching chamber 41.

[0066] The present application also discloses some embodiments, the gas-liquid separator further includes an outlet pipe 3, the outlet pipe 3 forms an outlet channel; the outlet pipe 3 includes an inner section and an outer section, the inner section is located inside the shell 1, and the outer section extends to the outside of the shell 1; the inner diameter of the cross section of the shell 1 is φD10z; the diameter of the first section 4211 is φD42u; the diameter of the second section 4212 is φD42d; the inner diameter of the outlet pipe 3 is φD3; the distance between the central axis of the second pipe 22 and the central axis of the shell 1 is S22; the distance between the central axis of the first pipe 21 and the central axis of the shell 1 is S21; in the movable direction of the movable structure 42 Upward, the distance between the central axis of the first section 4211 and the position on the movable structure 42 close to the first air vent 4131 is L42a, and the distance between the central axis of the first section 4211 and the position on the movable structure 42 close to the second air vent 4132 is L42b; here, L42a refers to the distance between the physical centers of the switching mechanism 4 close to the second air vent 4132 and the through hole, and L42b refers to the distance between the physical centers of the switching mechanism close to the first vent 4131 and the through hole. The total length of the two is the length of both ends of the switching mechanism, and the central axes of the first section 4211 and the second section 4212 coincide.

[0067] L42a+D42d / 2≥D10z / 2+D3 / 2;

[0068] This application also discloses some embodiments, L42b+D42d / 2≥D10z / 2+D3 / 2;

[0069] This application also discloses some embodiments, L42a+D42u / 2≥D22 / 2+S22+D10z / 2;

[0070] This application also discloses some embodiments, L42b+D42u / 2≥D21 / 2+S21+D10z / 2;

[0071] This application also discloses some embodiments, L42a+L42b≥D10z / 2+S21+D21 / 2;

[0072] This application also discloses some embodiments, L42a+L42b≥D10z / 2+S22+D22 / 2;

[0073] This application also discloses some embodiments, L42a+D42d / 2≤D10z / 2+S21-D21 / 2;

[0074] This application also discloses some embodiments, L42b+D42d / 2≤D10z / 2+S22-D22 / 2;

[0075] This application also discloses some embodiments, D22 / 2+D21 / 2≤S22+S21;

[0076] This application also discloses some embodiments, where D42u≥D22>D21.

[0077] In order to ensure the working efficiency of the switching mechanism 4 of the gas-liquid separator, avoid poor matching between components causing gas leakage to reduce the energy efficiency of the compressor 51 or sudden changes in the gas path to produce bad noise, the above relationship needs to be satisfied between the various dimensions.

[0078] This application also discloses some embodiments, in which the gas-liquid separator further includes an oil leakage hole, through which the lubricating oil in the housing 1 can enter the gas outlet passage. This allows an appropriate amount of lubricating oil from the gas-liquid separator to be introduced into the compressor 51, thereby preventing a large amount of lubricating oil from entering the compressor 51 and causing liquid hammer, and also preventing insufficient lubricating oil in the compressor 51, which would result in poor lubrication of the compressor 51. The oil leakage hole in the straight pipe of the liquid separator ensures that the oil circulated out of the system can be returned to the compressor.

[0079] The present application also discloses some embodiments. When the gas-liquid separator further includes a switching mechanism 4 and an outlet pipe 3, the switching mechanism 4 is arranged in the axial middle of the housing 1, and the oil leakage hole is arranged on the outlet pipe 3. The switching mechanism 4 is installed in the housing 1 of the gas-liquid separator in the present application, and it can switch between the first pipe 21 or the second pipe 22 connected to the air inlet of the compressor 51 for suction during the operation of the compressor 51. When the switching mechanism 4 is arranged in the axial middle of the housing 1, the oil leakage hole is arranged on the outlet pipe 3. This can bring an appropriate amount of lubricating oil from the gas-liquid separator into the compressor 51, which can prevent a large amount of lubricating oil from entering the compressor 51 and causing liquid hammer, and can also prevent too little lubricating oil in the compressor 51, resulting in poor lubrication of the compressor 51. The switching mechanism 4 is arranged in the axial middle of the housing 1, which means that there is a certain distance between the switching mechanism 4 and the bottom and top of the housing 1. When the switching mechanism 4 is arranged in the axial middle of the housing 1 and the oil leakage hole is arranged on the outlet pipe 3, the oil leakage hole needs to be arranged in a position where a certain space is left axially between the steel pipe and the bottom of the inner cavity of the liquid separator to provide conditions for oil storage. The switching mechanism of this application is arranged in the middle of the axial direction. The structure of the liquid separator is slightly modified compared with the conventional liquid separator, and the implementation difficulty is low. The switching mechanism of this application has a blocking effect on the downward flow of gas and liquid entering the liquid separator on both sides, reducing the disturbance of the inhaled gas and liquid to the next oil pool, making the oil return process smoother, and avoiding large amounts of oil return under large flow rates.

[0080] The present application also discloses some embodiments. When the gas-liquid separator also includes a switching mechanism 4, the switching mechanism 4 is arranged at the bottom of the shell 1, and the oil leakage hole is opened on the connecting pipe 2. The oil leakage hole can be opened on the first tube 21 and / or the second tube 22, that is, the oil leakage hole makes the liquid storage space above the switching mechanism 4. In this way, an appropriate amount of lubricating oil in the gas-liquid separator can be brought into the compressor 51, which can prevent a large amount of lubricating oil from entering the compressor 51 to cause liquid hammer, and can also prevent too little lubricating oil in the compressor 51, resulting in poor lubrication effect of the compressor 51. When the switching mechanism 4 is arranged at the bottom of the shell, it is necessary to form an oil storage space above the switching mechanism 4, and the oil leakage hole needs to be reopened, so the first tube 21 and the second tube 22 of the connecting pipe 2 need to be arranged separately. The first tube 21 and the second tube 22 are used in cooling and heating conditions respectively. The gas-liquid mixture ratio (mixture of refrigerant gas, refrigerant liquid, and refrigeration oil) corresponding to the working conditions is different. Therefore, the oil leakage holes of the two tubes can be set with axial distances and apertures respectively, which are more in line with the working conditions and gain advantages in capacity and reliability.

[0081] The gas-liquid separator of the present application has two connecting pipes 2 of different specifications in its shell 1, wherein the second pipe 22 is thicker and shorter, and the first pipe 21 is thinner and longer, so that the resonance frequency of the thicker steel pipe is outside the operating range of the compressor 51, and the resonance frequency of the thinner steel pipe is within the operating range of the heating condition of the compressor 51. The two connecting pipes 2 are both fixed on the switching mechanism 4 in the gas-liquid separator component, one end of the pipe opening is located under the filter 6 and the support 7, and the other end of the pipe opening is in the switching mechanism 4. The switching mechanism 4 can realize the connection of the specified pipe opening to the air inlet during the operation of the compressor 51 through the pressure difference. When the compressor 51 is running, for conventional refrigeration operating conditions, the thicker connecting pipe 2 can be connected to the suction port of the compressor 51 to meet sufficient suction volume, ensure refrigeration capacity, and avoid the resonance of the gas-liquid separator affecting the vibration of the compressor 51 and generating noise; when heating is required for low-temperature operating conditions, the thinner steel pipe can be connected to the suction port of the compressor 51. At this time, since the connecting pipe 2 will resonate with the suction, causing more obvious suction pulsation, the suction volume can be greatly increased, thereby improving the heating capacity under low-temperature conditions.

[0082] According to an embodiment of the present application, a compressor assembly is provided, including a gas-liquid separator and a compressor 51 body, the gas-liquid separator is the above-mentioned gas-liquid separator; the gas outlet channel of the gas-liquid separator is connected to the air intake of the compressor 51 body.

[0083] The gas-liquid separator of this application is assembled on a compressor 51 with a heat-increasing function. The compressor assembly includes an upper cover, a housing 1, a stator, a rotor, a pump body, a heat-increasing component 55, a lower cover, and a gas-liquid separator. When connected to an air conditioning system, compressor 51 draws in low-temperature, low-pressure gas through the gas-liquid separator's outlet pipe 3. When the heat-increasing function is activated, medium-temperature, medium-pressure gas is discharged through the heat-increasing component 55, and high-temperature, high-pressure gas is discharged through the exhaust pipe 511.

[0084] According to an embodiment of the present application, an air conditioner is provided, including a compressor assembly, which is the above-mentioned compressor assembly.

[0085] This application also discloses certain embodiments. When the air conditioner is in heating mode, the air outlet channel switches to connect with the first pipe 21. When the air conditioner is in cooling mode, the air outlet channel switches to connect with the second pipe 22. When the compressor 51 is operating, for conventional cooling operation, the air outlet channel switches to connect with the compressor 51 intake port, ensuring sufficient intake volume, ensuring cooling capacity, and preventing the resonance of the gas-liquid separator from affecting the vibration and noise of the compressor 51. When heating is required for low-temperature operation, the air outlet channel switches to connect with the compressor 51 intake port. At this time, since the connecting pipe 2 resonates with the intake air, causing significant intake pulsation, the intake volume can be significantly increased, thereby improving the heating capacity under low-temperature conditions. The gas-liquid separator of this application can be optimized for cooling and heating applications separately, improving the heating capacity of the compressor 51, reducing the air conditioning system's displacement requirements for the compressor 51, and facilitating optimization of the air conditioning system in terms of space, cost, and energy consumption. This application solves the problem of insufficient heating capacity when the gas-liquid separator design is optimized for cooling capacity.

[0086] The present application also discloses some embodiments, in which the air conditioner further includes a four-way valve 52, a first heat exchanger 53, a throttling component 54, a second heat exchanger 58 and an enthalpy increasing component 55 connected in sequence; when the gas-liquid separator further includes a switching mechanism 4, the switching mechanism 4 includes a movable structure 42, the switching mechanism 4 has a switching chamber 41, the switching chamber 41 also has a vent 413, and the vent 413 includes a first vent 4131 and a second vent 4132, the exhaust port of the enthalpy increasing component 55 is connected to the first vent 4131; the second vent 4132 can switch between being connected to the first heat exchanger 53 or the second heat exchanger 58 to adjust the pressure difference between the first gas in the first vent 4131 and the second gas in the second vent 4132, thereby pushing the movable structure 42 to move in the switching chamber 41, so that the air outlet channel is connected to the first pipe 21 or the second pipe 22. The gas-liquid separator implemented in the present application and the compressor 51 equipped with it are applied to an air-conditioning system with an enthalpy increase function. By utilizing the pressure difference between the suction pressure, intermediate pressure and exhaust pressure in the air-conditioning system, the switching mechanism 4 in the gas-liquid separator component is adjusted to connect the corresponding steel pipe to the air inlet of the pump body. When cooling, it switches to a thicker and shorter steel pipe to ensure suction pressure stability and reduce vibration; when heating, it switches to a thinner and longer steel pipe to ensure suction pulsation. The resonance frequency of the steel pipe is used to affect the suction pulsation, thereby achieving the optimization of cooling capacity and heating capacity respectively, thereby improving the heating capacity of the air-conditioning system.

[0087] The compressor 51 includes a first-stage compression structure and a second-stage compression structure. A portion of the gas compressed by the first-stage compression structure enters the second-stage compression structure for a second compression, and another portion of the gas compressed by the first-stage compression structure enters the enthalpy increasing component 55. A portion of the gas in the enthalpy increasing component 55 enters the flash evaporator 56 through the control valve 57, and another portion of the gas in the enthalpy increasing component 55 enters the first vent 4131, i.e., port b, through the exhaust port to form a first gas, which is a medium-temperature and medium-pressure gas compressed by the first-stage compression structure.

[0088] See attached Figure 6As shown in, during cooling, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 51 (the high-temperature and high-pressure gas compressed twice by the first-stage compression structure and the second-stage compression structure in sequence) passes through the four-way valve 52 and enters the first heat exchanger 53, the first throttle valve, the flash evaporator 56, the second throttle valve and the second heat exchanger 58 in sequence. At this time, the gas in the second heat exchanger 58 is a low-temperature and low-pressure gas; then it passes through the four-way valve 52 and enters the port a, i.e., the second air vent 4132, to form the second gas. At the same time, the medium-temperature and medium-pressure gas compressed by the first-stage compression structure enters the enthalpy increasing component 55, and a part of the gas in the enthalpy increasing component 55 enters the flash evaporator 56 through the control valve 57, and another part of the gas in the enthalpy increasing component 55 enters the first air vent 4131, i.e., the port b, through the exhaust port to form the first gas. At this time, the gas entering port a, i.e., the second vent 4132, is low-temperature, low-pressure gas, while the gas entering port b, i.e., the first vent 4131, is medium-temperature, medium-pressure gas. Therefore, under the action of the pressure differential, the movable structure 42 is pushed and moves to the second position, with one end of the through hole 421 at least partially facing the second connecting port 412, and the other end at least partially facing the gas outlet, thereby connecting the through hole 421 with the second connecting port 412 and the gas outlet. That is, at this time, low-temperature, low-pressure gas exists in port a, and medium-temperature, medium-pressure gas exists in port b. Due to the pressure differential, the movable structure 42 moves toward port a. At this time, the lower end of the second tube 22 is connected to the first section 4211 of the through hole 421 of the movable structure 42, while the lower end of the first tube 21 is located in the physical part of the movable structure 42 and is not connected. The low-temperature, low-pressure gas entering the gas-liquid separator inlet pipe 8 can enter the outlet pipe 3 through the second tube 22, thus achieving gas circulation within the system.

[0089] In the heating mode of the air conditioning system, a four-way valve 52 is installed, connecting the first heat exchanger 53 to the gas-liquid separator inlet pipe 8 and port a of the switching mechanism 4, the second heat exchanger 58 to the exhaust pipe 511 of the compressor 51, and the enthalpy-increasing component 55 to port b of the switching mechanism 4. At this point, high-temperature, high-pressure gas exists at port a, while medium-temperature, medium-pressure gas exists at port b. Due to the pressure differential, the movable structure 42 moves to port b. At this point, the lower end of the first tube 21 connects to the first section 4211 of the movable structure 42, while the lower end of the second tube 22, located on the solid portion of the movable structure 42, is disconnected. Low-temperature, low-pressure gas entering the gas-liquid separator inlet pipe 8 can enter the outlet pipe 3 through the second tube 22, completing gas circulation within the system.

[0090] Because the resonant frequency of the second pipe 22 is outside the operating range of the compressor 51, and the resonant frequency of the first pipe 21 is within the operating range of the compressor 51 under heating conditions, when the compressor 51 is running, for conventional cooling conditions, the second pipe 22 can be connected to the suction port of the compressor 51 to meet sufficient suction volume, ensure cooling capacity, and avoid the resonance of the gas-liquid separator affecting the vibration and noise of the compressor 51; for heating conditions, the first pipe 21 can be connected to the suction port of the compressor 51. At this time, since the connecting pipe 2 will resonate with the suction process, causing obvious suction pulsation, it can greatly increase the suction volume and improve the heating capacity under low temperature conditions. Figure 10-11 As shown, it can be seen that the present application can significantly improve the heating capacity under low temperature conditions. Figure 10 In the middle, there is a schematic diagram of the operating range and simulated cooling and heating conditions (cooling adds simulated minimum cooling and nominal cooling comparison, covering low, medium and high frequencies overall); Figure 11 In the figure, the comparison of the cooling capacity and heating capacity of the conventional gas-liquid separator and the gas-liquid separator of the present application under different schemes is shown; (wherein the heating capacity is calculated as the sum of the cooling capacity and power tested on the test bench).

[0091] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0092] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A gas-liquid separator, characterized in that: Comprising: A housing (1); An air outlet passage that can communicate with the suction port of a compressor (51); A connecting pipe (2) that can guide the gas in the housing (1) to flow out through the air outlet passage; the connecting pipe (2) includes a first pipe (21) and a second pipe (22); the resonance frequency of the first pipe (21) is the same as the operating frequency of the compressor (51); the second pipe (22) has a different frequency from the operating frequency of the compressor (51); and the air outlet passage can be switched between communicating with the first pipe (21) or the second pipe (22); The diameter of the first pipe (21) is D21; the diameter of the second pipe (22) is D22; wherein, D21 < D22; and / or, the length of the first pipe (21) is L21, and the length of the second pipe (22) is L22; wherein, L22 < L21; when the compressor operates, for the refrigeration operating condition, it is switched to the second pipe (22) to communicate with the suction port of the compressor, and when heating is required for the low-temperature operating condition, it is switched to the first pipe (21) to communicate with the suction port of the compressor.

2. The gas-liquid separator according to claim 1, characterized in that: 1.2 * D21 ≤ D22 ≤ 1.4 * D21; and / or, 0.65 * L21 ≤ L22 ≤ 0.85 * L21.

3. The gas-liquid separator according to claim 1, characterized in that: The gas-liquid separator further includes a switching mechanism (4), the switching mechanism (4) has a switching cavity (41), and the switching cavity (41) communicates with the air outlet passage; the switching cavity (41) can be switched between communicating with the first pipe (21) or the second pipe (22).

4. The gas-liquid separator according to claim 3, characterized in that: The switching mechanism (4) further includes a movable structure (42); the switching cavity (41) has a first communication port (411) and a second communication port (412), the first pipe (21) communicates with the first communication port (411), and the second pipe (22) communicates with the second communication port (412); the movable structure (42) can move within the switching cavity (41) to block the first communication port (411) or the second communication port (412), thereby enabling the switching cavity (41) to be switched between communicating with the first pipe (21) or the second pipe (22).

5. The gas-liquid separator according to claim 4, characterized in that: The movable structure (42) has a through hole (421). When the movable structure (42) blocks the first communication port (411), the through hole (421) communicates the second communication port (412) with the air outlet passage; when the movable structure (42) blocks the second communication port (412), the through hole (421) communicates the first communication port (411) with the air outlet passage.

6. The gas-liquid separator according to claim 5, characterized in that: The through hole (421) axially includes a first section (4211) and a second section (4212) that are sequentially connected; the aperture of the first section (4211) is smaller than the aperture of the second section (4212); the first section (4211) can communicate with the first communication port (411) or the second communication port (412), and the second section (4212) communicates with the air outlet passage.

7. The gas-liquid separator according to claim 6, characterized in that: The switching chamber (41) further has a vent (413); the gas introduced through the vent (413) can propel the movable structure (42) to move within the switching chamber (41).

8. The gas-liquid separator according to claim 7, characterized in that: The vent (413) includes a first vent (4131) and a second vent (4132), wherein a first gas can be introduced into the first vent (4131), and a second gas can be introduced into the second vent (4132), wherein the gas pressure of the first gas is different from the gas pressure of the second gas, so as to drive the movable structure (42) to move in the switching chamber (41).

9. The gas-liquid separator according to claim 8, characterized in that: The gas-liquid separator also includes an air supply pipeline, which includes a main pipe, a first branch pipe, a second branch pipe, and an air pressure regulating device. The first end of the main pipe is connected to the air supply device, the second end of the main pipe is connected to the first branch pipe and the second branch pipe, and the first branch pipe is connected to the first air vent (4131), and the second branch pipe is connected to the second air vent (4132); the gas in the first branch pipe forms the first gas, and the gas in the second branch pipe forms the second gas. The air pressure regulating device can adjust the gas pressure in the first branch pipe and / or the second branch pipe so that the gas pressure of the first gas is different from the gas pressure of the second gas.

10. The gas-liquid separator according to claim 8, characterized in that: The gas-liquid separator further comprises an outlet pipe (3), the outlet pipe (3) forming the gas outlet channel; the outlet pipe (3) comprises an inner section and an outer section, the inner section being located inside the shell (1), and the outer section extending outside the shell (1); the inner diameter of the cross section of the shell (1) is φD10z; the diameter of the first section (4211) is φD42u; the diameter of the second section (4212) is φD42d; the inner diameter of the outlet pipe (3) is φD3; the central axis of the second pipe (22) is aligned with the center axis of the shell (1); The distance between the axes is S22; the distance between the central axis of the first tube (21) and the central axis of the shell (1) is S21; in the movable direction of the movable structure (42), the distance between the central axis of the first section (4211) and the position on the movable structure (42) close to the first vent (4131) is L42a, and the distance between the central axis of the first section (4211) and the position on the movable structure (42) close to the second vent (4132) is L42b; Among them, L42a+D42d / 2≥D10z / 2+D3 / 2; and / or, L42b+D42d / 2≥D10z / 2+D3 / 2; and / or, L42a+D42u / 2≥D22 / 2+S22+D10z / 2; and / or, L42b+D42u / 2≥D21 / 2+S21+D10z / 2; and / or, L42a+L42b≥D10z / 2+S21+D21 / 2; and / or, L42a+L42b≥D10z / 2+S22+D22 / 2; and / or, L42a+D42d / 2≤D10z / 2+S21-D21 / 2; and / or, L42b+D42d / 2≤D10z / 2+S22-D22 / 2; and / or, D22 / 2+D21 / 2≤S22+S21; and / or, D42u≥D22>D21.

11. The gas-liquid separator according to any one of claims 1 to 10, characterized in that: The gas-liquid separator further comprises an oil leakage hole, through which the lubricating oil in the housing (1) can enter the gas outlet channel.

12. The gas-liquid separator according to claim 11, characterized in that: When the gas-liquid separator further includes a switching mechanism (4) and an outlet pipe (3), the switching mechanism (4) is arranged at the axial middle portion of the housing (1), and the oil leakage hole is arranged on the outlet pipe (3); Alternatively, when the gas-liquid separator further includes a switching mechanism (4), the switching mechanism (4) is arranged at the bottom of the shell (1), and the oil leakage hole is opened on the connecting pipe (2).

13. A compressor assembly comprising a gas-liquid separator and a compressor (51) body, characterized in that: The gas-liquid separator is the gas-liquid separator according to any one of claims 1 to 12; the gas outlet passage of the gas-liquid separator is connected to the air intake of the compressor (51) body.

14. An air conditioner comprising a compressor assembly, characterized in that: The compressor assembly is the compressor assembly described in claim 13.

15. The air conditioner according to claim 14, characterized in that: When the air conditioner is in a heating state, the air outlet channel is switched to communicate with the first pipe (21); and / or, when the air conditioner is in a cooling state, the air outlet channel is switched to communicate with the second pipe (22).

16. The air conditioner according to claim 14, characterized in that The air conditioner further comprises a four-way valve (52), a first heat exchanger (53), a throttling component (54), a second heat exchanger (58) and an enthalpy increasing component (55) connected in sequence; when the gas-liquid separator further comprises a switching mechanism (4), the switching mechanism (4) comprises a movable structure (42), the switching mechanism (4) comprises a switching chamber (41), the switching chamber (41) further comprises a vent (413), the vent (413) comprises a first vent (4131) and a second vent (4132), the enthalpy increasing component (55) The exhaust port of the enthalpy component (55) is connected to the first vent (4131); the second vent (4132) can be switched between being connected to the first heat exchanger (53) or the second heat exchanger (58) to adjust the pressure difference between the first gas in the first vent (4131) and the second gas in the second vent (4132), thereby driving the movable structure (42) to move in the switching chamber (41), so that the air outlet channel is connected to the first tube (21) or the second tube (22).

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