Scroll compressor, refrigeration equipment and vehicle

Abstract

The invention belongs to the technical field of refrigeration equipment, and particularly relates to a scroll compressor, refrigeration equipment and a vehicle. The scroll compressor comprises an oil separation device provided with a shell and an oil separation insertion pipe, an oil separation cavity and an oil storage pool are arranged in the shell, the oil separation insertion pipe is arranged in the oil separation cavity, an oil discharge hole is formed in the cavity wall of the oil separation cavity, and a refrigerant outlet is formed in the shell. The overflowing area S1 of the refrigerant outlet, the overflowing area S2 of the air inlet end of the oil separation inserting pipe and the overflowing area S3 of the oil discharging hole meet the conditions that S2 / S1 is larger than or equal to 0.05 and smaller than or equal to 0.5, and S3 / S1 is larger than or equal to 0.02 and smaller than or equal to 0.3, so that the refrigerant is discharged from the refrigerant outlet at a high speed after being separated, the internal pressure of the oil separation cavity is rapidly reduced, the pressure acting on the refrigerant oil is reduced, and the pressure and the flowing speed when the refrigerant oil is discharged are reduced; and the impact on refrigeration oil in the oil storage pool is reduced, so that the oil return hole of the oil storage pool can be always immersed by the refrigeration oil, a refrigerant cannot leak through the oil return hole, the return oil of the compressor is sufficient, and a friction pair can be effectively lubricated.

Description

[0001] This application is a divisional application. The application number of the original application is 202011063083.0, the filing date of the original application is September 30, 2020, the title of the original application is "Scroll Compressor, Refrigeration Equipment and Vehicle", and the entire content of the original application is incorporated herein by reference. Technical Field

[0002] The present invention relates to the technical field of refrigeration equipment, and particularly relates to a scroll compressor, refrigeration equipment and a vehicle. Background Art

[0003] The statements herein only provide background information related to the present invention and do not necessarily constitute prior art.

[0004] A scroll compressor is a positive displacement compressor with high efficiency, low noise and stable operation. As the third-generation vehicle-mounted compressor, it is widely used in automotive air-conditioning systems. In recent years, with the development of new energy vehicles, the requirements for the noise, vibration and durability of the air-conditioning scroll compressor in vehicles have been further improved. During the use of the scroll compressor, it is necessary to provide refrigeration oil to lubricate the friction pairs in the scroll compressor to reduce the noise generated when the friction pairs work. In the prior art, an oil separator structure and an oil storage tank are arranged in the scroll compressor. The oil separator structure is used to separate the mixed fluid of the refrigerant and the refrigeration oil discharged from the compression chamber of the scroll compressor. The oil storage tank is arranged below the oil separator structure and is used to store the refrigeration oil separated and discharged by the oil separator structure. At the same time, a throttling oil return structure is arranged between the oil storage tank and the oil return passage of the scroll compressor. An oil return hole is opened at the bottom of the oil storage tank and is connected to the inlet of the throttling oil return structure, so that the refrigeration oil in the oil storage tank finally returns to the oil return passage of the scroll compressor through the throttling oil return structure to lubricate each friction pair in the scroll compressor.

[0005] During actual use, since the oil discharge hole for discharging the refrigeration oil of the oil separator structure is arranged directly opposite to the oil storage tank, the refrigeration oil separated by the oil separator structure and discharged from the oil discharge hole will wash the existing refrigeration oil in the oil storage tank, causing the refrigeration oil to churn, resulting in the oil return hole connected to the throttling oil return structure in the oil storage tank not being completely immersed in the refrigeration oil, and the refrigerant directly leaks to the suction side of the scroll compressor, that is, gas leakage occurs during oil return, and the refrigerant leakage causes the refrigeration capacity of the scroll compressor to decrease. Moreover, when the refrigerant leaks through the throttling oil return structure, it will occupy the fluid conveying space of the throttling oil return structure, reducing the volume of the refrigeration oil conveyed by the throttling oil return structure and decreasing the proportion of the refrigeration oil in the oil return, resulting in the friction pairs not being effectively lubricated, increasing the power consumption of the scroll compressor and reducing the compression efficiency. Summary of the Invention

[0006] The object of the embodiments of the present invention is to provide a scroll compressor, a refrigeration device and a vehicle, aiming at solving the technical problems in the prior art that the refrigerating oil discharged from the oil drain hole of the oil separation structure of the scroll compressor flushes the refrigerating oil in the oil storage pool, resulting in a decrease in the proportion of refrigerating oil in the oil return, an inability to effectively lubricate the friction pair, an increase in the power consumption of the scroll compressor, and a decrease in the compression efficiency.

[0007] To solve the above technical problems, a technical solution adopted in the embodiments of the present invention is:

[0008] A scroll compressor is provided with an oil separation device. The oil separation device includes a housing and an oil separation insertion tube. An oil storage pool and an oil separation chamber are arranged in the housing. The oil separation insertion tube is arranged in the oil separation chamber and has an air inlet end and an air outlet end. An oil drain hole is formed on the chamber wall of the oil separation chamber, and the oil drain hole is communicated with the oil storage pool. A refrigerant outlet is formed on the housing, and the air outlet end of the oil separation insertion tube is communicated with the refrigerant outlet. The following relationship is satisfied among the flow area S1 of the refrigerant outlet, the flow area S2 of the air inlet end of the oil separation insertion tube, and the flow area S3 of the oil drain hole:

[0009] 0.05 ≤ S2 / S1 ≤ 0.5, 0.02 ≤ S3 / S1 ≤ 0.3.

[0010] In some embodiments, the following relationship is satisfied between the flow area S2 of the air inlet end of the oil separation insertion tube and the flow area S3 of the oil drain hole:

[0011] 0.08 ≤ S3 / S2 ≤ 0.8.

[0012] In some embodiments, an oil outlet channel is further arranged in the housing. The oil outlet channel has an oil inlet and an oil outlet. The oil outlet is located above the oil inlet. The oil inlet is communicated with the oil drain hole, and the oil outlet is communicated with the oil storage pool.

[0013] In some embodiments, the following relationship is satisfied between the flow area S4 of the oil outlet and the flow area S3 of the oil drain hole:

[0014] 1 ≤ S4 / S3 ≤ 7.

[0015] In some embodiments, along the direction from the oil inlet to the oil outlet, the flow area of the oil outlet channel gradually increases or remains unchanged.

[0016] In some embodiments, the oil outlet is arranged facing away from the bottom of the oil storage pool;

[0017] Alternatively, the oil outlet is arranged facing the bottom of the oil storage pool, and a buffer part is arranged on the pool wall of the oil storage pool. The buffer part is located below the oil outlet and forms a gap between the buffer part and the pool wall of the oil storage pool.

[0018] In some embodiments, exhaust holes are formed on the pool wall of the oil storage pool. The exhaust holes are communicated with the refrigerant outlet. The following relationship is satisfied between the flow area S5 of the exhaust holes and the flow area S2 of the intake end of the oil separation insertion tube:

[0019] 0.015 ≤ S5 / S2 ≤ 1.

[0020] In some embodiments, the refrigerant outlet is a gradually expanding port.

[0021] One or more of the above technical solutions in the scroll compressor provided by the present invention have at least the following technical effects: The scroll compressor provided by the present invention is provided with an oil separation device including an oil separation insertion tube, and an oil storage pool and an oil separation chamber are arranged in the shell of the oil separation device. The oil separation insertion tube is arranged in the oil separation chamber. At the same time, an oil discharge hole is formed on the chamber wall of the oil separation chamber, a refrigerant outlet is formed on the shell, and the oil discharge hole is connected to the oil storage pool, and the outlet end of the oil separation insertion tube is connected to the refrigerant outlet. At the same time, the following proportional relationship is satisfied among the flow area S1 of the refrigerant outlet, the flow area S2 of the intake end of the oil separation insertion tube, and the flow area S3 of the oil discharge hole: 0.05 ≤ S2 / S1 ≤ 0.5, 0.02 ≤ S3 / S1 ≤ 0.3, that is, the flow area of the refrigerant outlet is larger than the flow area of the intake end of the oil separation insertion tube, and the flow area of the refrigerant outlet is larger than the flow area of the oil discharge hole. In this way, the refrigerant separated after the fluid entering the oil separation chamber collides with the oil separation insertion tube and the chamber wall of the oil separation chamber can be discharged through the refrigerant outlet at a relatively fast speed, thereby timely reducing the internal pressure of the oil separation chamber and reducing the pressure acting on the refrigerating oil discharged through the oil discharge hole, so that the flow rate and pressure of the refrigerating oil discharged through the oil discharge hole are reduced, so that the impact force of the refrigerating oil discharged through the oil discharge hole on the existing refrigerating oil in the oil storage pool is reduced, and the refrigerating oil in the oil storage pool is less affected by the incoming oil disturbance, so as to ensure that the refrigerating oil in the oil storage pool does not churn due to the incoming oil, ensure that the oil return hole of the oil storage pool is always immersed in the refrigerating oil, avoid the leakage of the refrigerant into the oil return channel through the oil return hole, that is, avoid the occurrence of gas leakage during oil return, ensure sufficient oil return of the scroll compressor, ensure effective lubrication of the friction pairs of the scroll compressor, and thus improve the compression efficiency of the scroll compressor.

[0022] Another technical solution adopted in the embodiment of the present invention is:

[0023] A refrigeration device includes the above-mentioned scroll compressor.

[0024] The refrigeration equipment provided by the present invention has at least the following beneficial effects compared with the prior art: The refrigeration equipment provided by the present invention, by using the above-mentioned scroll compressor, since the oil return hole of the oil storage tank of the scroll compressor can always be immersed in the refrigeration oil, the refrigerant will not leak into the oil return channel of the scroll compressor through the oil return hole, that is, the scroll compressor will not have the phenomenon of gas leakage, the oil return of the scroll compressor is sufficient, the compression efficiency of the scroll compressor is improved, and the refrigeration capacity of the refrigeration equipment is enhanced.

[0025] Another technical solution adopted in the embodiment of the present invention is:

[0026] A vehicle includes the above-mentioned scroll compressor.

[0027] The vehicle provided by the present invention has at least the following beneficial effects compared with the prior art: The vehicle provided by the present invention, by using the above-mentioned refrigeration equipment during the refrigeration process of the vehicle, since the refrigeration capacity and refrigeration efficiency of the refrigeration equipment can always be maintained at a high level, the cooling time inside the vehicle can be effectively shortened, the cooling speed of the vehicle is increased, and the vehicle use experience is improved. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a cross-sectional view of a scroll compressor provided for an embodiment of the present invention;

[0030] Figure 2 It is a cross-sectional view of a scroll compressor provided for another embodiment of the present invention;

[0031] Figure 3 For Figure 2 It is a partial cross-sectional view of the scroll compressor shown;

[0032] Figure 4 It is a partial cross-sectional view of a scroll compressor provided for another embodiment of the present invention;

[0033] Figure 5 For Figure 4 It is a schematic structural diagram when the seal of the scroll compressor shown is assembled with the stationary scroll of the scroll compressor;

[0034] Figure 6 For Figure 4 It is a schematic structural diagram of the seal shown;

[0035] Figure 7 ForFigure 4 Schematic diagram of the structure of the stationary scroll plate in the shown structure;

[0036] Figure 8 Schematic diagram of the relationship between S3 / S2 and the gas leakage rate;

[0037] Figure 9 Schematic diagram of the relationship between S4 / S3 and the outlet flow rate when the refrigerating oil flows out of the oil outlet;

[0038] Figure 10 Schematic diagram of the relationship between S5 / S2 and the pressure difference ΔP between the oil outlet and the oil inlet of the oil outlet channel.

[0039] Among them, the reference numerals in the figure are as follows:

[0040] 10 - housing; 100 - oil separator device; 101 - housing; 1011 - connection surface; 1012 - accommodation groove; 1013 - connection channel; 1014 - oil retaining part; 1015 - oil retaining surface; 1016 - oil separation cavity; 1017 - oil drain hole; 1018 - rectifying chamber; 1019 - oil separation inlet; 1020 - mixed fluid inlet; 1021 - streamline wall surface; 11 - oil separation insertion tube; 111 - air inlet end; 112 - air outlet end; 12 - oil storage tank; 121 - oil return hole; 122 - exhaust hole; 123 - rib; 13 - oil outlet channel; 131 - oil inlet; 132 - oil outlet; 133 - introduction section; 134 - discharge section; 14 - refrigerant outlet; 15 - stationary scroll plate; 151 - first communication groove; 152 - second communication groove; 153 - mixed fluid outlet; 16 - seal; 161 - clearance; 17 - groove; 18 - moving scroll plate; 20 - oil return channel; 30 - compression chamber; 40 - throttle oil return structure; 50 - suction port; 60 - suction chamber; 70 - compression mechanism; 80 - drive mechanism. Specific embodiments

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Figures 1 - 10 It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0042]

[0043] ​It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0045] Reference to "an embodiment", "some embodiments" or "embodiments" in the description of the present invention means that a specific feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present invention. Thus, statements such as "in an embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. In addition, in one or more embodiments, specific features, structures or characteristics may be combined in any suitable manner.

[0046] As Figures 1 - 7 shown, an embodiment of the present invention provides a scroll compressor. As Figure 1 and Figure 2 shown, the scroll compressor may but is not limited to including: a housing 10, an air inlet 50 is formed on the housing 10, and a compression mechanism 70, a driving mechanism 80, etc. are arranged inside the housing 10.

[0047] Among them, the compression mechanism 70 may but is not limited to include a moving scroll 18, a stationary scroll 15 and an anti-rotation structure. The stationary scroll 15 may include an end plate and a stationary scroll wrap, and the moving scroll 18 may include an end plate and a moving scroll wrap. The stationary scroll wrap and the moving scroll wrap are engaged and joined to define a compression chamber 30 (i.e., the working chamber of the scroll compressor) between the stationary vortex and the moving vortex. The anti-rotation device is used to restrict the rotation of the moving scroll 18 while allowing the moving scroll 18 to perform a rotational translation relative to the stationary scroll 15. The drive mechanism 80 may but is not limited to include a motor and a crankshaft composed of a stator and a rotor. Among them, the crankshaft can rotate integrally with the rotor, and the crankshaft can be provided with an eccentric pin at the upper end suitable for driving the moving scroll 18. The rotor drives the moving scroll 18 to rotate through the eccentric pin. The suction port 50 is opened on the housing 10 and is connected to the compression chamber 30. The low-pressure refrigerant (working fluid) from the external working circuit of the housing 10 is sucked into the compression mechanism 70 through the suction port 50 for compression.

[0048] The scroll compressor is also provided with an oil separation device 100. The oil separation device 100 includes a housing 101 and an oil separation insertion tube 11. The oil separation device 100 can be integrally arranged in the housing 10 or can be arranged outside the housing 10 and connected to other structures of the scroll compressor through the housing 101. A storage oil pool 12 and an oil separation chamber 1016 are arranged in the housing 101. The mixed fluid of the refrigerant and the refrigeration oil discharged from the compression chamber 30 is output into the oil separation chamber 1016 for oil-gas separation. Specifically, the oil separation insertion tube 11 is arranged in the oil separation chamber 1016 and has an air inlet end 111 and an air outlet end 112. An oil separation inlet 1019 for the mixed fluid to enter and an oil drain hole 1017 for the refrigeration oil to be discharged are opened on the chamber wall of the oil separation chamber 1016. The oil drain hole 1017 is connected to the storage oil pool 12. After the mixed fluid enters the oil separation chamber 1016 from the oil separation inlet 1019, it flows in a spiral manner and collides with the chamber wall and the oil separation insertion tube 11. In this embodiment, the flow path of the mixed fluid is as Figures 1 - 4 shown by the dotted line arrow in. During the flow of the mixed fluid, due to the different densities of the refrigeration oil and the refrigerant, the forced separation of the refrigeration oil and the refrigerant can be realized under the action of centrifugal force. The separated refrigerant enters the oil separation insertion tube 11 from the air inlet end 111 of the oil separation insertion tube 11 and is discharged through the air outlet pipe 112. The separated refrigeration oil is discharged through the oil drain hole 1017 and stored in the storage oil pool 12. At the same time, a refrigerant outlet 14 is opened on the housing 101, and the air outlet end 112 of the oil separation insertion tube 11 is connected to the refrigerant outlet 14. In this way, the refrigerant discharged from the air outlet end of the oil separation insertion tube 11 is discharged to the external working circuit of the scroll compressor through the refrigerant outlet 14.

[0049] Furthermore, an oil return passage 20 is also formed in the housing 10 of the scroll compressor. An oil return hole 121 for discharging the refrigeration oil is formed in the wall of the oil storage tank 12. The oil return passage 20 is communicated with the oil return hole 121. A throttling oil return structure 40 is arranged between the oil return passage 20 and the oil storage tank 12. The refrigeration oil in the oil storage tank 12 flows through the throttling oil return structure 40 and is delivered into the oil return passage 20 to lubricate each friction pair of the scroll compressor.

[0050] When the scroll compressor operates, with the motor powered on, the rotor rotates, driving the crankshaft to rotate synchronously. The crankshaft drives the orbiting scroll 18 to perform orbiting translation through an eccentric pin. Meanwhile, the refrigerant, i.e., the working fluid, enters the suction chamber 60 of the compression mechanism 70 through the suction port 50. As the orbiting scroll 18 continues to orbit and translate, the refrigerant is further sucked from the suction chamber 60 into the compression chamber 30. At this time, the refrigerant entering the compression chamber 30 is compressed and its pressure increases. When the compression ratio of the refrigerant reaches a predetermined value, the refrigerant is discharged from the compression chamber 30. For example, a mixed fluid outlet 153 communicated with the oil separator inlet 1019 is formed on the stationary scroll 15, and the refrigerant is discharged through the mixed fluid outlet 153. During the process of compressing the refrigerant, the refrigeration oil lubricating the friction pair is carried by the refrigerant and enters the compression chamber 30. Therefore, the fluid discharged from the mixed fluid outlet 153 of the stationary scroll 15 is a mixed fluid of the refrigerant and the refrigeration oil, and it needs to be processed after being discharged to separate the refrigerant and the refrigeration oil. Thus, the mixed fluid of the refrigerant and the refrigeration oil is delivered into the oil separator chamber 1016 for separating the refrigerant and the refrigeration oil. The separated refrigerant is discharged from the refrigerant outlet 14 of the scroll compressor, and the separated refrigeration oil enters the oil storage tank 12, further flows into the throttling oil return structure 40 through the oil return hole 121, and enters the oil return passage 20 to lubricate the friction pair, thereby realizing the recycling of the refrigeration oil.

[0051] In an embodiment of the present invention, as Figure 1 and Figure 2 shown, the following proportional relationships are satisfied among the flow-through area S1 of the refrigerant outlet 14, the flow-through area S2 of the intake end 111 of the oil separator insert pipe 11, and the flow-through area S3 of the oil drain hole 1017: 0.05 ≤ S2 / S1 ≤ 0.5 and 0.02 ≤ S3 / S1 ≤ 0.3.

[0052] Thus, for the scroll compressor according to the embodiment of the present invention, by setting the relationship between the flow area S1 of the refrigerant outlet 14, the flow area S2 of the intake end 111 of the oil separator insertion tube 11, and the flow area S3 of the oil drain hole 1017 to satisfy the proportional relationship: 0.05 ≤ S2 / S1 ≤ 0.5, 0.02 ≤ S3 / S1 ≤ 0.3, that is, when designing and manufacturing the scroll compressor, the ratio of the flow area S2 of the intake end 111 of the oil separator insertion tube 11 to the flow area S1 of the refrigerant outlet 14 is designed within the range of 0.05 to 0.5, and the ratio of the flow area S3 of the oil drain hole 1017 to the flow area S1 of the refrigerant outlet 14 is designed within the range of 0.02 to 0.3. In this way, the flow area of the refrigerant outlet 14 is larger than the flow area of the intake end 111 of the oil separator insertion tube 11, and the flow area of the refrigerant outlet 14 is larger than the flow area of the oil drain hole 1017. In this way, the refrigerant separated after the fluid entering the oil separation chamber 1016 collides with the oil separator insertion tube 11 and the wall of the oil separation chamber 1016 can be discharged through the refrigerant outlet 14 at a relatively fast speed, thereby timely reducing the internal pressure of the oil separation chamber 1016 and reducing the pressure acting on the refrigerating oil discharged through the oil drain hole 1017, so that the flow rate and pressure of the refrigerating oil discharged through the oil drain hole 1017 are reduced, thereby reducing the impact force of the refrigerating oil discharged through the oil drain hole 1017 on the existing refrigerating oil in the oil storage tank 12. The refrigerating oil in the oil storage tank 12 is less affected by the incoming oil disturbance, thereby ensuring that the refrigerating oil in the oil storage tank 12 does not churn due to the incoming oil, ensuring that the oil return hole 121 of the oil storage tank 12 is always immersed in the refrigerating oil, avoiding the leakage of the refrigerant through the oil return hole 121 into the oil return passage 20 of the scroll compressor, that is, avoiding gas leakage during oil return, ensuring sufficient oil return of the scroll compressor, ensuring effective lubrication of the friction pair of the scroll compressor, and thus improving the compression efficiency of the scroll compressor.

[0053] In some specific embodiments, the ratio between the flow area S2 of the intake end 111 of the above-mentioned oil separator insertion tube 11 and the flow area S1 of the refrigerant outlet 14, that is, S2 / S1, can be 0.05, 0.1, 0.2, 0.3, 0.4, etc. The ratio between the flow area S3 of the above-mentioned oil drain hole 1017 and the flow area S1 of the refrigerant outlet 14, that is, S3 / S1, can be 0.02, 0.05, 0.08, 0.1, 0.15, 0.2, 0.25, or 0.3, etc.

[0054] Specifically, in this embodiment, as Figure 1 and Figure 2 shown, the oil drain hole 1017 is opened at the bottom of the oil separation chamber 1016 close to the oil storage tank 12, the refrigerant outlet 14 is opened at the top of the oil separation chamber 1016 far from the oil storage tank 12, the intake end 111 of the oil separator insertion tube 11 is arranged towards the oil drain hole 1017, and the outlet end 112 is arranged towards the refrigerant outlet 14.

[0055] In another embodiment of the present invention, as Figure 1 and Figure 2 shown, the ratio of the flow-through area S2 of the air inlet end 111 of the oil separator insertion tube 11 to the flow-through area S3 of the oil discharge hole 1017 further satisfies the proportional relationship of 0.08 ≤ S3 / S2 ≤ 0.8, that is, the ratio of the flow-through area S3 of the oil discharge hole 1017 to the flow-through area S2 of the air inlet end 111 of the oil separator insertion tube 11 is designed within the range of 0.08 to 0.8. Specifically, as Figure 8 shown, it shows the relationship between S3 / S2 and the gas leakage volume q 3 (i.e., the amount of refrigerant leaked into the oil return passage 20 of the scroll compressor through the oil return hole 121). It can be easily seen from the figure that as S3 / S2 increases, the gas leakage volume gradually increases. Thus, by selecting and designing the ratio of S3 to S2 within the range of 0.08 to 0.8, on the premise of considering the manufacturing error of parts, the gas leakage volume is relatively small and will not have an adverse impact on the oil return volume of the refrigerating oil. That is, within this range, the gas leakage volume leaking through the oil return hole 121 of the oil storage tank 12 has little impact on the proportion of refrigerating oil in the oil return.

[0056] In some specific embodiments, the ratio of the flow-through area S3 of the above-mentioned oil discharge hole 1017 to the flow-through area S2 of the air inlet end 111 of the oil separator insertion tube 11, that is, S3 / S2, can be 0.08, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 or 0.8, etc.

[0057] In another embodiment of the present invention, as Figure 2 , Figure 3 and Figure 4As shown in the figure, an oil outlet passage 13 is further provided in the housing 101 of the above-mentioned oil separation device 100. The oil outlet passage 13 is connected to the oil drain hole 1017. The refrigeration oil discharged from the oil drain hole 1017 flows through the oil outlet passage 13 and then is discharged into the oil storage tank 12. Specifically, the oil outlet passage 13 has an oil inlet 131 and an oil outlet 132 which are oppositely arranged. The oil outlet 132 is located above the oil inlet 131. In this embodiment, the oil outlet 132 being located above the oil inlet 131 means that along the gravity direction, the oil outlet 132 is directly above or obliquely above the oil inlet 131. After the refrigeration oil flows into the oil outlet passage 13 from the oil inlet 131, the refrigeration oil needs to flow against the gravity direction to flow out from the oil outlet 132. Among them, the oil inlet 131 is communicated with the oil drain hole 1017, the oil outlet 132 is communicated with the oil storage tank 12, and the oil outlet 132 is located above the oil storage area of the oil storage tank 12. The oil return hole 121 is located in the oil storage area. Among them, the oil storage area of the oil storage tank 12 refers to the area where the refrigeration oil is actually stored in the oil storage tank 12 when using the scroll compressor of this embodiment. In this way, setting the oil outlet 132 above the oil storage area ensures that the oil outlet 132 is always above the liquid level of the refrigeration oil in the oil storage tank 12. In this way, as the storage amount of the refrigeration oil in the oil storage tank 12 increases, the refrigeration oil will never submerge the oil outlet 132, thereby avoiding the oil outlet 132 extending into the refrigeration oil to discharge the refrigeration oil, avoiding the generation of bubbles when the refrigeration oil is discharged, resulting in the churning of the refrigeration oil, or the bubbles entering the throttle oil return structure 40 through the oil return hole 121 and occupying the internal space of the throttle oil return structure 40.

[0058] In this way, by providing the oil outlet passage 13 in the housing 101 of the oil separation device 100 and connecting the oil inlet 131 of the oil outlet passage 13 to the oil drain hole 1017 of the oil separation chamber 1016, and connecting the oil outlet 132 of the oil outlet passage 13 to the oil storage tank 12, in this way, after the refrigeration oil discharged from the oil separation chamber 1016 is discharged from the oil drain hole 1017, it enters the oil outlet passage 13 through the oil inlet 131, and then flows into the oil storage tank 12 through the oil outlet 132 of the oil outlet passage 13. In this embodiment, the flow path of the refrigeration oil is as Figures 1 - 4 shown by the dotted arrow in the figure. Since the oil outlet 132 of the oil outlet passage 13 is arranged above the oil inlet 131 along the gravity direction, the refrigeration oil entering the oil outlet passage 13 flows against the gravity direction. In this way, the pressure of the refrigeration oil can be effectively reduced, and the outflow speed of the refrigeration oil can be reduced. In this way, the flow rate and pressure of the refrigeration oil discharged from the oil outlet 132 are reduced, and the impact force of the refrigeration oil discharged on the existing refrigeration oil in the oil storage tank 12 is reduced, further providing better guarantee for maintaining the stability of the liquid level of the existing refrigeration oil in the oil storage tank 12.

[0059] Furthermore, in this embodiment, as Figure 2 、 Figure 3 and Figure 4As shown, the flow area S4 of the oil outlet 132 of the oil outlet channel 13 and the flow area S3 of the oil drain hole 1017 satisfy the proportional relationship of 1≤S4 / S3≤7, that is, the ratio of the flow area S4 of the oil outlet 132 of the oil outlet channel 13 to the flow area S3 of the oil drain hole 1017 is designed within the range of 1 to 7. In this way, the flow area S4 of the oil outlet 132 of the oil outlet channel 13 is larger than the flow area S3 of the oil drain hole 1017, and when the refrigerant oil flows out from the oil outlet 132, the flow area suddenly increases, and the flow rate is further slowed down, which helps to further reduce the impact of the refrigerant oil discharged from the oil outlet 132 on the refrigerant oil liquid level in the oil storage tank 12.

[0060] Specifically, Figure 9 As shown, it shows the relationship between S4 / S3 and the outlet flow rate when the refrigerant oil flows out of the oil outlet 132. It is easy to see from the figure that as S4 / S3 increases, the outlet flow rate gradually decreases. In this way, the design ratio of S4 to S3 is selected within the range of 1 to 7. Under the premise of considering the manufacturing error of parts, the flow rate of the refrigerant oil flowing out of the oil outlet 132 of the oil outlet channel 13 is relatively small, which will not have an adverse effect on the refrigeration oil refrigeration volume. That is, within this range, the amount of blowby gas leaked through the oil return hole 121 of the oil storage tank 12 has little effect on the proportion of refrigerant oil in the return oil.

[0061] In some specific embodiments, the ratio of the flow area S4 of the oil outlet 132 of the oil outlet channel 13 to the flow area S3 of the oil drain hole 1017, i.e. S4 / S3, can be 1, 2, 3, 4, 0.4, 5, 6 or 7, etc.

[0062] In another embodiment of the present invention, Figure 2 , Figure 3 and Figure 4 As shown, an exhaust hole 122 is provided on the wall of the oil storage tank 12, and the exhaust hole 122 is connected to the refrigerant outlet 14. After the refrigerant oil enters the oil storage tank 12, due to the relative decrease in pressure and temperature, part of the refrigerant dissolved in the refrigerant oil will precipitate. Therefore, an exhaust hole 122 for discharging the precipitated refrigerant is provided on the wall of the oil storage tank 12, and the exhaust hole 122 is connected to the refrigerant outlet 14 on the casing 10. The refrigerant precipitated from the refrigerant oil and entered into the oil storage tank 12 is collected through the exhaust hole 122 and discharged from the refrigerant outlet 14. In this embodiment, the flow path of the refrigerant is as follows: Figures 1 - 4 Indicated by the solid arrow.

[0063] In this embodiment, when the refrigeration oil flows through the oil outlet passage 13, due to the reduction in the pressure of the refrigeration oil, the refrigerant dissolved in the refrigeration oil precipitates, and the precipitated refrigerant is discharged through the exhaust hole 122, avoiding the retention of the refrigerant in the oil storage tank 12, which may cause an increase in the internal pressure of the oil storage tank 12 and result in the re-dissolution of the precipitated refrigerant in the refrigeration oil. More importantly, by setting the exhaust hole 122 to discharge the refrigerant, it is ensured that the pressure Pk at the oil inlet 131 of the oil outlet passage 13 is always greater than the pressure Pd' at the oil outlet 132, that is, a pressure difference (Pk - Pd' > 0) is formed between the oil outlet 132 and the oil inlet 131 of the oil outlet passage 13. Under the action of this pressure difference, it is ensured that the refrigeration oil can be discharged from the oil outlet 132 of the oil outlet passage 13. In this way, even if the refrigeration oil flows against the direction of gravity, it can still flow smoothly out of the oil outlet 132, avoiding the occurrence of interrupted flow or backflow.

[0064] Further, in this embodiment, as Figure 2 , Figure 3 and Figure 4 shown, the ratio of the flow-through area S5 of the exhaust hole 122 to the flow-through area S2 of the air inlet end 111 of the oil separator insert 11 satisfies the proportional relationship of 0.015 ≤ S5 / S2 ≤ 1, that is, the ratio of the flow-through area S5 of the exhaust hole 122 to the flow-through area S2 of the air inlet end 111 of the oil separator insert 11 is designed within the range of 0.015 to 1. Specifically, as Figure 10 shown, it shows the relationship between S5 / S2 and Pk - Pd' (the pressure difference ΔP between the oil outlet 132 and the oil inlet 131 of the oil outlet passage 13). It is easy to know from the figure that when S5 / S2 takes values within the range of 0.015 to 1, the pressure difference ΔP is greater than zero, that is, it can ensure that the refrigerant precipitated from the refrigeration oil is discharged through the exhaust hole 122 under the action of pressure. And since the greater the pressure difference ΔP, the faster the flow rate of the refrigeration oil in the oil outlet passage 13, therefore, on the premise that the pressure difference ΔP meets the requirement for refrigerant discharge, the ratio of S5 / S2 is avoided from being set too large, so as to prevent the refrigeration oil in the oil outlet passage 13 from accelerating its flow under excessive pressure, ensuring that the refrigeration oil can flow and decelerate along the oil outlet passage 13, and ensuring the oil discharge stability of the oil outlet passage 13. In addition, by selecting the ratio of S5 / S2 within the above value range, it is avoided that the aperture of the exhaust hole 122 is set too large, resulting in overflow through the exhaust hole 122 from the oil outlet 132 of the oil outlet passage 13.

[0065] In some specific embodiments, the ratio of the flow-through area S5 of the exhaust hole 122 to the flow-through area of the air inlet end 111 of the oil separator insert 11, that is, S5 / S2, can be 0.015, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08 or 1.0, etc.

[0066] In another embodiment of the present invention, as Figure 2, Figure 3 and Figure 4 As shown in Figure 3 and Figure 4 , from the oil inlet 131 to the oil outlet 132 of the oil outlet passage 13, the flow-through area of the oil outlet passage 13 gradually increases, that is, along the flow direction of the refrigerant oil, the flow-through area of the oil outlet passage 13 gradually increases. In this way, during the flow of the refrigerant oil along the oil outlet passage 13, as the flow-through area gradually increases, the flow velocity of the refrigerant oil gradually decreases, and the velocity of the refrigerant oil when discharged from the oil outlet 132 decreases, so that the impact on the existing refrigerant oil in the oil storage tank 12 when the refrigerant oil is discharged from the oil outlet 132 can be further reduced; and, the slower the flow velocity of the refrigerant oil, the more the precipitation amount of the refrigerant during the flow process can be further increased, and the amount of the refrigerant dissolved in the refrigerant oil entering the oil storage tank 12 can be further reduced, and the proportion of the refrigerant oil entering the oil return passage 20 of the scroll compressor can be increased.

[0067] Optionally, in some other embodiments, from the oil inlet 131 to the oil outlet 132, the flow-through area of the oil outlet passage 13 can also remain unchanged, that is, along the flow direction of the refrigerant oil, the flow-through area of the oil outlet passage 13 remains unchanged. In this way, due to the frictional resistance along the oil outlet passage 13, when the refrigerant oil flows through the oil outlet passage 13, its flow velocity can also gradually slow down.

[0068] In another embodiment of the present invention, as Figure 2 , Figure 3 and Figure 4 shown, the above-mentioned oil outlet passage 13 is a bent passage having at least one bent section. The oil outlet passage 13 is set as a bent passage having a bent section. When the refrigerant oil flows into the oil outlet passage 13 at a high speed, it will impact the channel wall when turning at the bent section, and the local resistance suffered by the refrigerant oil during the flow process increases, so that the flow velocity and pressure of the refrigerant oil can be further reduced. In this way, setting the oil outlet passage 13 with a bent section can not only reasonably utilize the area of the bent section, increase the residence time of the refrigerant oil in the oil outlet passage 13, and cause more precipitation of the refrigerant dissolved in the refrigerant oil, but also increase the local resistance of the oil outlet passage 13 and effectively reduce the flow velocity and pressure of the refrigerant oil.

[0069] Further, in this embodiment, the oil outlet passage 13 is preferably an "L"-shaped passage provided with a bent section, and the bent section of the "L"-shaped passage is rounded to avoid excessive impact of the refrigerant oil on the channel wall and wear of the channel. Of course, in some other embodiments, the above-mentioned oil outlet passage 13 can also be an "S"-shaped passage provided with a plurality of bent sections, or other passages having one or more bent sections. The specific setting form of the oil outlet passage 13 is not uniquely limited here.

[0070] In another embodiment of the present invention, as Figure 2 and Figure 3As shown, a plurality of ribs 123 are arranged at intervals on the pool wall of the oil storage tank 12. One end of the rib 123 faces the top of the oil storage tank 12, and the opposite end of the rib 123 faces the bottom of the oil storage tank 12, that is, a plurality of ribs 123 all extend from one end of the oil storage tank 12 to the opposite end along the direction of gravity. By arranging a plurality of ribs 123 on the pool wall of the oil storage tank 12, on the one hand, the rib 123 can be used to guide the refrigerating oil discharged from the oil outlet 132 into the oil storage tank 12, further reducing the scouring of the refrigerating oil in the oil storage tank 12 by the oil discharged from the oil outlet 132. On the other hand, the rib 123 can also be used to further absorb the heat of the refrigerating oil, further reducing the temperature of the refrigerating oil entering the oil storage tank 12, thereby increasing the precipitation amount of the refrigerant.

[0071] Further, in this embodiment, as Figure 2 and Figure 3 shown, the end of the rib 123 facing away from the oil outlet 132 extends to the bottom of the oil storage tank 12, that is, when the oil storage tank 12 stores refrigerating oil, the end of the rib 123 facing away from the oil outlet 132 extends below the liquid level of the refrigerating oil. In this way, the refrigerating oil sprayed from the oil outlet 132 can be directly guided to converge with the refrigerating oil in the oil storage tank 12, minimizing the scouring of the liquid level of the refrigerating oil in the oil storage tank 12 by the incoming refrigerating oil.

[0072] Furthermore, in this embodiment, the plurality of ribs 123 can be, but are not limited to, integrally formed on the pool wall of the oil storage tank 12, with a simple processing technology and convenient forming and manufacturing.

[0073] In another embodiment of the present invention, as Figure 2 and Figure 3 shown, the oil outlet 132 is arranged facing away from the bottom of the oil storage tank 12, that is, when the oil storage tank 12 stores refrigerating oil, the oil outlet 132 is arranged facing away from the liquid level of the refrigerating oil. In this way, the setting of the oil outlet passage 13 can change the outflow direction of the refrigerating oil, and the refrigerating oil discharged from the oil outlet 132 does not directly face the liquid level of the refrigerating oil, so it will not directly scour the liquid level of the refrigerating oil, thereby further reducing the impact of the refrigerating oil discharged from the oil outlet 132 on the existing refrigerating oil in the oil storage tank 12 and better ensuring the stability of the existing refrigerating oil in the oil storage tank 12.

[0074] Further, in this embodiment, the oil outlet 132 is located below the exhaust hole 122 along the direction of gravity, preventing the refrigerating oil discharged from the oil outlet 132 from entering the exhaust hole 122 when flowing along the pool wall of the oil storage tank 12 and being discharged through the exhaust hole 122 along with the refrigerant. Preferably, in this embodiment, a valve structure for blocking the outflow of the refrigerating oil can also be arranged in the exhaust hole 122 to prevent the refrigerating oil from gushing out through the exhaust hole 122 due to too high an outflow speed.

[0075] Of course, in some other embodiments, the exhaust hole 122 may also be disposed below the oil outlet 132. In this case, a valve for blocking the outflow of the refrigerating oil needs to be provided in the exhaust hole 122 to prevent the refrigerating oil from flowing out through the exhaust hole 122.

[0076] Optionally, in another embodiment of the present invention, the oil outlet 132 may not be disposed facing away from the bottom of the oil storage tank 12, that is, the oil outlet 132 is disposed facing the bottom of the oil storage tank 12. In this case, a buffer portion (not shown) may be provided between the oil storage area of the oil storage tank 12 and the oil outlet 132, that is, between the liquid level of the refrigerating oil and the oil outlet 132, and it is ensured that a gap is formed between the buffer portion and the tank wall of the oil storage tank 12 for the refrigerating oil to flow through. In this way, the refrigerating oil discharged from the oil outlet 132 impacts the buffer portion and then falls into the oil storage tank 12. The setting of the buffer portion can further buffer the impact force of the refrigerating oil. Even if the oil outlet 132 faces the liquid level of the refrigerating oil, the flushing effect on the existing refrigerating oil in the oil storage tank 12 is relatively small.

[0077] Further, in this embodiment, the buffer portion is a buffer baffle protruding from the tank wall of the oil storage tank 12. The side wall of the buffer baffle is spaced from the side wall of the tank body of the oil storage tank 12 to form a gap for the refrigerating oil to flow through. Alternatively, the buffer portion is an orifice plate protruding from the tank wall of the oil storage tank 12, and a plurality of through holes are provided in the orifice plate, and the refrigerating oil flows out through the through holes in the orifice plate.

[0078] In another embodiment of the present invention, as Figure 2 and Figure 3 shown, the above-mentioned oil outlet passage 13 is provided as an oil outlet pipe. The oil outlet pipe includes an introduction section 133 and a discharge section 134 connected to the introduction section 133. The port of the introduction section 133 away from the discharge section 134 forms an oil inlet 131, and the port of the discharge section 134 away from the introduction section 133 forms an oil outlet 132. In this way, the oil outlet passage 13 adopts a pipe-type passage. By selecting a suitable pipe and disposing it in the housing 10 of the scroll compressor, the above-mentioned oil outlet passage 13 can be formed. The structure of the oil outlet passage 13 is relatively simple and convenient to manufacture and form.

[0079] Further, in this embodiment, the discharge section 134 is connected to the introduction section 133 at an angle, and a bending section of the oil outlet passage 13 is formed at the connection angle. Specifically, in this embodiment, the connection angle between the introduction section 133 and the discharge section 134 may be an acute angle, a right angle or an obtuse angle.

[0080] Furthermore, in the present embodiment, the discharge section 134 penetrates through the pool wall of the oil storage tank 12 so that the oil outlet 132 extends into the oil storage tank 12, that is, the discharge section 134 is inserted into the pool wall of the oil storage tank 12 to ensure that the discharge port 132 extends into the oil storage tank 12. Alternatively, the introduction section 133 penetrates through the pool wall of the oil storage tank 12, that is, the introduction section 133 is inserted into the pool wall of the oil storage tank 12, and the part of the introduction section 133 connected to the discharge section 134 extends into the oil storage tank 12, and the discharge section 134 is entirely located within the oil storage tank 12. In this way, the upper non-oil storage space of the oil storage tank 12 can be reasonably utilized, and the space occupied by the setting of the oil outlet passage 13 can be minimized as much as possible.

[0081] As Figures 4 - 7 shown, in another embodiment of the present invention, as an alternative to the above embodiment, a first communication groove 151 and a second communication groove 152 are provided on the side wall of the stationary scroll 15 of the scroll compressor of the present embodiment facing the housing 101 of the oil separator 100. As Figure 7 shown, the first communication groove 151 is arranged close to the oil inlet 131, and the second communication groove 152 is arranged close to the refrigerant outlet 14. The oil drain hole 1017 is connected to the oil inlet 131 through the first communication groove 151, and the exhaust hole 122 is connected to the refrigerant outlet 14 through the second communication groove 152. By providing the first communication groove 151 and the second communication groove 152 on the stationary scroll 15, the refrigerating oil discharged from the oil drain hole 1017 flows into the oil inlet 131 of the oil outlet passage 131 through the first communication groove 151, and the refrigerant discharged from the exhaust hole 122 of the oil storage tank 12 is connected to the refrigerant outlet 14 through the second communication groove 152 and discharged. In this way, there is no need to provide additional pipelines or ducts in the housing 10 of the scroll compressor or the housing 101 of the oil separator 100 to guide the refrigerating oil or refrigerant to flow, and the existing structure of the scroll compressor is reasonably utilized to simplify the overall structure of the scroll compressor of the present embodiment.

[0082] In the present embodiment, as Figure 5 and Figure 6As shown, the scroll compressor further includes a seal 16. The seal 16 is adhesively connected to the end face of the stationary scroll 15 facing the housing 101 of the oil separator device 100 (i.e., the side wall surface of the stationary scroll 15 facing away from the orbiting scroll 18). Moreover, the shape of the seal 16 is substantially the same as the shape of the end face of the stationary scroll 15, and the size of the seal 16 is substantially the same as the size of the side wall surface of the stationary scroll 15, ensuring that the overall appearance of the scroll compressor is more aesthetically pleasing. Further, a groove 17 is provided on the end face of the stationary scroll 15 facing away from the orbiting scroll 18. Openings are provided at both ends of the groove 17. The groove 17 and the seal 16 enclose the above-mentioned oil outlet channel 13. One end opening of the groove 17 forms the oil outlet 132 of the oil outlet channel 13, and the other end opening of the groove 17 forms the oil inlet 131 of the oil outlet channel 13. In this way, by providing the seal 16 adhesively connected to the end face of the stationary scroll 15, the seal 16 is hermetically and adhesively connected to the end face of the stationary scroll 15, and the end face of the groove wall of the groove 17 abuts against the seal 16, an oil outlet channel 13 can be formed within the housing 30, and the arrangement form of the oil outlet channel 13 is simple.

[0083] Optionally, the above-mentioned groove 17 can also be provided on the seal 16, that is, a groove 17 with openings at both ends is provided on the end face of the seal 16 facing away from the housing 101. The groove 17 and the end face of the stationary scroll 15 enclose the above-mentioned oil outlet channel 13, and the two openings at both ends of the groove 17 respectively form the oil inlet 131 and the oil outlet 132 of the oil outlet channel 13. In this way, by providing the seal 16 adhesively connected to the end face of the stationary scroll 15, the seal 16 is hermetically and adhesively connected to the end face of the stationary scroll 15, and the end face of the groove wall of the groove 17 abuts against the seal 16, an oil outlet channel 13 can also be formed within the housing 30.

[0084] In this embodiment, the seal 16 can be, but is not limited to, a sealing gasket that is hermetically fitted to the side wall surface of the stationary scroll 15, etc.

[0085] It should be noted that in the above two embodiments, the setting of the seal 16 does not affect the normal discharge of the refrigerating oil and the refrigerant.

[0086] In another embodiment of the present invention, as another alternative to the above embodiment, as Figure 4As shown, the housing 101 of the oil separation device 100 has a connection surface 1011, and the connection surface 1011 is adaptively connected to the end surface of the stationary scroll 15 facing away from the moving scroll 18. Among them, the adaptive connection between the connection surface 1011 and the end surface of the stationary scroll 15 means that the shape of the connection surface 1011 is the same as or similar to the shape of the end surface of the stationary scroll 15, and the size of the connection surface 1011 is basically the same as the size of the end surface of the stationary scroll 15. Further, a groove with both ends open is provided on the connection surface 1011. Specifically, the connection surface 1011 is recessed away from the stationary scroll 15 to form the groove 17. The end surface of the stationary scroll 15 abuts against the connection surface 1011 and encloses the above-mentioned oil outlet passage 13 with the groove 17. One end opening of the groove 17 forms the oil outlet 132 of the oil outlet passage 13, and the other end opening of the groove 17 forms the oil inlet 131 of the oil outlet passage 13. By providing the groove 17 on the connection surface 1011 of the housing 101, when the connection surface 1011 of the housing 101 abuts against the end surface of the stationary scroll 15, the end surface of the groove wall of the groove 17 abuts tightly against the end surface of the stationary scroll 15, and the above-mentioned oil outlet passage 13 can be formed. This setting form of the oil outlet passage 13 is also relatively simple.

[0087] In this embodiment, as Figure 4 shown, a receiving groove 1012 for receiving the groove 17 is further provided in the housing 101. The inner wall surface of the receiving groove 1012 and the outer wall surface of the groove 17 enclose the above-mentioned oil storage pool 12. The oil return hole 121 and the exhaust hole 122 are both provided on the housing 101. In this way, the oil separation insertion tube 11, the oil storage pool 12, the oil outlet passage 13, etc. are arranged in the same housing 101. The housing 101 is independently formed with the housing 10 of the scroll compressor. The housing 101 is more convenient to disassemble and install, and the maintenance and repair of the oil separation insertion tube 11, the oil storage pool 12, the oil outlet passage 13, etc. are more convenient.

[0088] In this embodiment, as Figure 4 shown, a connection passage 1013 is further provided in the housing 101. The connection passage 1013 is used for the separated refrigerant to flow through. The inlet of the connection passage 1013 is connected to the oil outlet 132, and the outlet of the connection passage 1013 is connected to the exhaust hole 122. The refrigerant discharged from the oil outlet 132 of the oil outlet passage 13 flows through the connection passage 1013 and is then discharged through the exhaust hole 122. The setting of the connection passage 1013 can, on the one hand, increase the interval distance between the exhaust hole 122 and the oil outlet 132 of the oil outlet passage 13 to prevent the refrigerating oil discharged from the oil outlet 132 from flowing into the exhaust hole 122; on the other hand, the channel wall of the connection passage 1013 is connected to the pool wall of the oil storage pool 12, and the separated refrigerant contacts the channel wall of the connection passage 1013. In this way, the connection passage 1013 can further cool the separated refrigerant, so that the gaseous refrigerating oil mixed in the refrigerant condenses on the channel wall surface and flows back into the oil storage pool 12, thereby better preventing the refrigerating oil from being discharged with the refrigerant.

[0089] In this embodiment, as Figure 4 shown, an oil baffle portion 1014 is provided on the channel wall surface of the connecting channel 1013. The oil baffle portion 1014 is used to block the refrigerating oil flowing out from the oil outlet 132 from flowing into the exhaust hole 122 through the connecting channel 1013. In this embodiment, the oil baffle portion 1014 is arranged close to the oil outlet 132, and a gap is formed between the oil baffle portion 1014 and the end face of the oil outlet 132 to ensure that the refrigerating oil flowing out from the oil outlet 132 can be smoothly discharged. In this way, the oil baffle portion 1014 can effectively block the refrigerating oil from entering the connecting channel 1013, and both the refrigerating oil and the separated refrigerant can be normally discharged through the gap between the oil baffle portion 1014 and the end face of the oil outlet 132. In this way, by providing the oil baffle portion 1014, the refrigerating oil can be effectively blocked from entering the exhaust hole 122 without hindering the normal discharge of the refrigerating oil and the refrigerant.

[0090] Furthermore, in this embodiment, a oil blocking surface 1015 is formed on the side of the oil baffle portion 1014 facing the oil outlet 132. The oil blocking surface 1015 is spaced from the end face of the oil outlet 132, that is, to ensure that a gap is left between the oil baffle portion 1014 and the end face of the oil outlet 132. Specifically, the oil outlet 132 can be partially or completely blocked by the oil blocking surface 1015 to ensure that the refrigerating oil discharged from the oil outlet 132 hits the oil blocking surface 1015 and then falls back into the oil storage tank 12.

[0091] Even further, in this embodiment, the oil baffle portion 1014 is a rib-shaped structure integrally formed on the channel wall of the connecting channel 1013.

[0092] In another embodiment of the present invention, as Figure 2 、 Figure 3 and Figure 4 shown, a rectifying chamber 1018 is further provided in the housing 101, and the rectifying chamber 1018 is arranged close to the oil separation chamber 1016. The rectifying chamber 1018 is used to perform noise elimination, pressure reduction and speed reduction processing on the mixed fluid of the refrigerant and the refrigerating oil before the mixed fluid enters the oil separation chamber 106. In this embodiment, a mixed fluid inlet 1020 is further opened on the housing 101. The mixed fluid inlet 1020 is communicated with the rectifying chamber 1018. The mixed fluid inlet 1020 is communicated with the mixed fluid outlet 153 on the static scroll 15 and the rectifying chamber 1018, so as to introduce the mixed fluid discharged from the compression chamber 30 into the rectifying chamber 1018. In this way, the mixed fluid discharged from the compression chamber 30 of the scroll compressor first enters the rectifying chamber 1018 through the mixed fluid inlet 1020, and the mixed fluid discharged from the rectifying chamber 1018 then enters the oil separation chamber 1016 through the oil separation inlet 1019 for oil-gas separation in the rectifying chamber. Specifically, when the rectifying chamber 1018 is provided, the flow path of the mixed fluid is as Figure 2 and Figure 4 shown by the dash-dotted arrows at the midpoint.

[0093] In this embodiment, the oil inlet 1019 is arranged above the mixed fluid inlet 1020 along the gravity direction, preventing the mixed fluid entering the rectifying chamber 1018 from the oil inlet 1019 from directly entering the oil separation chamber 1016 through the oil inlet 1019 without flowing in the rectifying chamber 1018, that is, preventing the short circuit of the mixed fluid, so as to ensure that the rectifying chamber 1018 can reliably and effectively rectify and step down the mixed fluid. During use, the mixed fluid inlet 1020 opened on the housing 101 is connected to the mixed fluid outlet 153 opened on the stationary scroll 15. In this way, the mixed fluid of refrigerant and refrigerating oil discharged from the compression chamber 30 of the scroll compressor enters the rectifying chamber 1018 through the mixed fluid inlet 1020. The rectifying chamber 1018 can rectify the discharged mixed fluid, reduce the flow rate of the mixed fluid, and weaken the pressure pulsation, thereby realizing the pressure reduction of the mixed fluid. Thus, when the mixed fluid rectified by the rectifying chamber 1018 enters the oil separation chamber 1016 for oil separation treatment, since the mixed fluid has undergone a primary pressure reduction, its pressure is greatly reduced. When it collides with the chamber wall of the oil separation chamber 1016 and the oil separation insert pipe 11, due to the greatly reduced pressure of the mixed fluid, the pressure pulsation of the mixed fluid is weakened, the flow rate is reduced, the impact force of the mixed fluid on the chamber wall and the oil separation insert pipe 11 is reduced, the impact noise is reduced, and the impact loss of the oil separation insert pipe 11 is reduced, and the service life is extended.

[0094] Further, in this embodiment, as Figure 4 shown, the rectifying chamber 1018 is a chamber with a streamline-shaped wall surface 1021, and the streamline-shaped wall surface 1021 is arranged directly opposite to the mixed fluid inlet 1020. The mixed fluid flowing in through the mixed fluid inlet 1020 flows in the rectifying chamber 1018 under the guidance of the streamline-shaped wall surface 1021. In this way, the mixed fluid flows along the streamline-shaped wall surface 1021, and the fluid flow is more smooth, so as to further reduce the impact of the mixed fluid on the inner wall surface of the rectifying chamber 1018 and more effectively improve the noise reduction effect of the rectifying chamber 1018.

[0095] Even further, in this embodiment, as Figure 5 and Figure 6 shown, when the scroll compressor is provided with a seal 16, the position of the seal 16 directly opposite to the mixed fluid inlet 1020 is hollowed out, so as to form an avoidance space 161 for avoiding the mixed fluid inlet 1020 at the position of the seal 16 directly opposite to the mixed fluid inlet 1020, ensuring that the discharge of the mixed fluid is not blocked by the seal 16 and ensuring that the mixed fluid can be discharged into the rectifying chamber 1018 through the mixed fluid inlet 1020.

[0096] In another embodiment of the present invention, the housing 101 of the oil separation device 100 and the seal 16 are both made of materials with strong impact resistance to ensure that the housing 101 and the seal 16 will not be deformed by the impact of the mixed fluid, refrigerant or refrigerating oil, thereby extending the service life of the housing 101 and the seal 16.

[0097] In another embodiment of the present invention, the refrigerant outlet 14 is provided as a gradually expanding port, that is, the flow-through area of the refrigerant outlet 14 gradually increases along the refrigerant flow direction, so that at least a part of the refrigerant outlet 14 forms a horn shape. When the refrigerant flows in the refrigerant outlet 14, the flow velocity gradually decreases, so that the air flow can be decelerated and depressurized at the outlet of the refrigerant outlet 14, which plays a role in rectifying the refrigerant to a certain extent, and further makes the discharge of the refrigerant more stable, and reduces the impact on the housing 101 during the process of the refrigerant flowing and discharging along the refrigerant outlet 14.

[0098] It should be noted that in this embodiment, when the refrigerant outlet 14 is provided as a gradually expanding port, the flow-through area S1 of the refrigerant outlet 14 refers to the flow-through area of the inlet end of the refrigerant outlet 14.

[0099] Another embodiment of the present invention also provides a refrigeration device (not shown in the figure), and the refrigeration device includes the above-mentioned scroll compressor.

[0100] For the refrigeration device provided in this embodiment, by using the above-mentioned scroll compressor, since the oil return hole 121 of the oil storage tank 12 of the scroll compressor can always be immersed in the refrigerating oil, the refrigerant will not leak into the oil return channel 20 of the scroll compressor through the oil return hole 121, that is, the scroll compressor will not have the phenomenon of gas leakage, the oil return of the scroll compressor is sufficient, the compression efficiency of the scroll compressor is high, and the refrigeration capacity of the refrigeration device is improved.

[0101] Another embodiment of the present invention also provides a vehicle, and the vehicle includes the above-mentioned refrigeration device.

[0102] For the vehicle provided in this embodiment, by using the above-mentioned refrigeration device during the vehicle refrigeration process, since the refrigeration capacity and refrigeration efficiency of the refrigeration device can always be maintained at a high level, the cooling time inside the vehicle can be effectively shortened, the cooling speed of the vehicle is increased, and the vehicle use experience is improved.

[0103] It should be noted that in this embodiment, the specific type of the above vehicle is not limited. For example, the vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy vehicles include but are not limited to pure electric vehicles, range-extended electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc., and this embodiment does not make special restrictions on this.

[0104] The above are only optional embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A scroll compressor is provided with an oil separator device. The oil separator device includes a housing and an oil separator insertion tube. A oil storage pool and an oil separation chamber are arranged in the housing. The oil separator insertion tube is arranged in the oil separation chamber and has an air inlet end and an air outlet end. A refrigerant outlet is formed on the housing. The air outlet end of the oil separator insertion tube is communicated with the refrigerant outlet. It is characterized in that: An exhaust hole is formed on the pool wall of the oil storage pool. The exhaust hole is communicated with the refrigerant outlet. And the following relationship is satisfied between the flow-through area S5 of the exhaust hole and the flow-through area S2 of the air inlet end of the oil separator insertion tube: 0.015 ≤ S5 / S2 ≤ 1.

2. The scroll compressor according to claim 1, wherein, A drain hole is formed on the chamber wall of the oil separation chamber. The drain hole is communicated with the oil storage pool. The following relationship is satisfied among the flow-through area S1 of the refrigerant outlet, the flow-through area S2 of the air inlet end of the oil separator insertion tube, and the flow-through area S3 of the drain hole: 0.05 ≤ S2 / S1 ≤ 0.5, 0.02 ≤ S3 / S1 ≤ 0.

3.

3. The scroll compressor according to claim 2, wherein, The following relationship is satisfied between the flow-through area S2 of the air inlet end of the oil separator insertion tube and the flow-through area S3 of the drain hole: 0.08 ≤ S3 / S2 ≤ 0.

8.

4. The scroll compressor according to claim 2, wherein An oil outlet channel is further arranged in the housing. The oil outlet channel has an oil inlet and an oil outlet. The oil outlet is located above the oil inlet. The oil inlet is communicated with the drain hole. The oil outlet is communicated with the oil storage pool.

5. The scroll compressor according to claim 4, wherein, The following relationship is satisfied between the flow-through area S4 of the oil outlet and the flow-through area S3 of the drain hole: 1 ≤ S4 / S3 ≤ 7.

6. The scroll compressor according to claim 4, characterized in that, Along the direction from the oil inlet to the oil outlet, the flow-through area of the oil outlet channel gradually increases or remains unchanged.

7. The scroll compressor according to claim 4, characterized in that, The oil outlet is arranged facing away from the bottom of the oil storage pool; Or, the oil outlet is arranged facing the bottom of the oil storage pool, and a buffer part is arranged on the pool wall of the oil storage pool. The buffer part is located below the oil outlet and a gap is formed between the buffer part and the pool wall of the oil storage pool.

8. The scroll compressor according to any one of claims 1 to 7, characterized in that, The refrigerant outlet is a gradually expanding port.

9. A refrigeration device, characterized in that, A scroll compressor according to any one of claims 1 to 8.

10. A vehicle, characterized in that, A refrigeration device according to claim 9.

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