Compressors and refrigeration equipment

Abstract

The present invention discloses a compressor and refrigeration equipment, wherein the compressor includes a pump body assembly, a muffler and an oil separation structure, the pump body assembly is provided with an exhaust port, the muffler covers the exhaust port and is provided with a discharge port, the oil separation structure covers the air outlet side of the discharge port and forms a cavity, the oil separation structure is provided with an exhaust channel and a filter element located in the exhaust channel, and an oil discharge channel is provided at the connection between the muffler or the pump body assembly and the oil separation structure, the oil discharge channel connects the cavity and the interior of the compressor shell. The present invention provides an oil separation structure, so that the mixture discharged from the discharge port diffuses into the cavity and is discharged from the oil separation structure after passing through the filter element of the exhaust channel, thereby effectively separating the refrigerant oil and gaseous refrigerant in the mixture, and the refrigerant oil separated in the cavity can flow back to the connection under the action of gravity, and promptly flow back to the oil pool of the compressor through the oil discharge channel, thereby improving the refrigeration oil refrigeration speed and improving the reliability of the compressor operation.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor and a refrigeration device. Background Art

[0002] In the related technology, when the pump body assembly of the compressor compresses the refrigerant and discharges the gaseous refrigerant, the refrigeration oil of the compressor will be discharged along with the refrigerant. The oil separation device of the traditional compressor has a poor effect on separating the refrigeration oil, and the separated refrigeration oil cannot flow back to the oil pool at the bottom of the compressor casing in time, which will cause the oil level inside the compressor to drop, thereby affecting the lubrication effect of the vanes and other parts, and reducing the reliability of the compressor during operation. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a compressor that can improve the separation efficiency of refrigeration oil from gaseous refrigerant while increasing the refrigeration oil refrigeration rate and improving the reliability of compressor operation.

[0004] The present invention also provides a refrigeration device having the compressor.

[0005] According to an embodiment of the first aspect of the present invention, a compressor includes: a pump body assembly, which is provided with an exhaust port; a muffler, which is connected to the pump body assembly and covers the exhaust port, and the muffler is provided with an exhaust port; an oil separation structure, which is connected to the muffler or the pump body assembly, the oil separation structure covers the air outlet side of the exhaust port and forms a cavity, the oil separation structure is provided with an exhaust channel and a filter element located in the exhaust channel; an oil discharge channel, which is provided at the connection between the muffler or the pump body assembly and the oil separation structure, and the oil discharge channel connects the cavity and the inside of the compressor casing.

[0006] The compressor according to the embodiment of the present invention has at least the following beneficial effects:

[0007] By setting an oil separation structure connected to the pump body assembly or the muffler, the muffler covers the exhaust port set in the pump body assembly, and the oil separation structure covers the discharge port set in the muffler, the oil separation structure forms a cavity and is provided with an exhaust channel, the mixture discharged from the discharge port diffuses into the cavity through the air outlet side of the discharge port, and is discharged from the oil separation structure after passing through the filter element of the exhaust channel, thereby effectively separating the refrigerant oil and the gaseous refrigerant in the mixture, improving the oil separation efficiency of the compressor, reducing the oil discharge volume, and also reducing the power consumption generated by compressing or stirring the refrigerant oil during operation of the pump body assembly, thereby improving the energy efficiency of the compressor; and an oil discharge channel is provided at the connection between the oil separation structure and the muffler or pump body assembly connected thereto, so that the refrigerant oil separated in the cavity can flow back to the connection under the action of gravity, and promptly flow back to the oil pool in the outer casing of the compressor through the oil discharge channel, thereby improving the refrigeration oil refrigeration speed, thereby ensuring the lubrication effect of moving parts such as the pump body assembly, and improving the reliability of the compressor operation.

[0008] According to some embodiments of the present invention, the oil separator structure includes an oil separator housing and a convex edge, the oil separator housing forms the cavity, the convex edge is connected to the outer peripheral edge of the oil separator housing, the convex edge is connected to the muffler, and the oil drain channel is formed between the convex edge and the muffler.

[0009] According to some embodiments of the present invention, a first groove is provided at one end of the convex edge connected to the muffler, and the first groove forms the oil drainage channel.

[0010] According to some embodiments of the present invention, a second groove is provided at one end of the muffler connected to the convex edge, and the second groove forms the oil drainage channel.

[0011] According to some embodiments of the present invention, the flange and the muffler are fixed to the pump body assembly by fasteners.

[0012] According to some embodiments of the present invention, one end of the oil separation structure connected to the pump body assembly is provided with a convex edge, the convex edge is provided with a third groove, and the third groove forms the oil discharge channel.

[0013] According to some embodiments of the present invention, a fourth groove is provided at one end of the pump body assembly connected to the oil structure, the fourth groove forms the oil drainage channel, and the end of the fourth groove away from the center of the oil structure extends to the outer periphery of the pump body assembly.

[0014] According to some embodiments of the present invention, the exhaust channel is at least one exhaust hole, which is provided at one end of the oil separation structure away from the discharge port along the axial direction of the pump body assembly, and the filter element covers the exhaust hole.

[0015] According to some embodiments of the present invention, in a projection plane perpendicular to the axial direction of the pump body assembly, the exhaust hole and the discharge port are spaced apart.

[0016] According to some embodiments of the present invention, the circumferential intervals of the oil separation structure are inwardly recessed to form a plurality of compartments, the plurality of compartments are interconnected, and the oil separation structure is provided with a plurality of exhaust holes, which are arranged in a one-to-one correspondence with the plurality of compartments.

[0017] According to some embodiments of the present invention, a plurality of the oil drainage channels are provided, and the plurality of oil drainage channels are respectively connected to the corresponding compartments and the interior of the compressor casing.

[0018] According to some embodiments of the present invention, a total cross-sectional area of the plurality of oil drainage channels is smaller than a total cross-sectional area of the plurality of exhaust holes.

[0019] According to some embodiments of the present invention, the oil separator housing includes a peripheral wall, a bottom wall and a fixed plate, the exhaust channel is provided on the bottom wall, the filter element is fixedly connected to the bottom wall, and the fixed plate is fixedly connected to an end of the filter element away from the bottom wall.

[0020] According to some embodiments of the present invention, the filter element is a filter screen, the filter screen is concave and deformed to form a filter housing attached to the inner wall of the oil separator housing, and the filter housing is fixedly connected to the oil separator housing.

[0021] According to some embodiments of the present invention, a positioning edge is provided on the outer periphery of the filter housing, and the positioning edge, the convex edge and the muffler are fixedly connected.

[0022] The refrigeration equipment according to the second embodiment of the present invention includes the compressor described in the above embodiment.

[0023] The refrigeration equipment according to the embodiment of the present invention has at least the following beneficial effects:

[0024] The compressor adopts the first embodiment, and the compressor is provided with an oil separation structure connected to the pump body assembly or the muffler, the muffler covers the exhaust port provided in the pump body assembly, and the oil separation structure covers the exhaust port provided in the muffler. The oil separation structure forms a cavity and is provided with an exhaust channel. The mixture discharged from the exhaust port diffuses into the cavity through the air outlet side of the exhaust port, and is discharged from the oil separation structure after passing through the filter element of the exhaust channel, thereby effectively separating the refrigerant oil and the gaseous refrigerant in the mixture, improving the oil separation efficiency of the compressor, reducing the oil discharge volume, and reducing the power consumption generated by compressing or stirring the refrigerant oil during operation of the pump body assembly, thereby improving the energy efficiency of the compressor; and an oil discharge channel is provided at the connection between the oil separation structure and the muffler or pump body assembly connected thereto, so that the refrigerant oil separated in the cavity can flow back to the connection under the action of gravity, and promptly flow back to the oil pool in the compressor casing through the oil discharge channel, thereby improving the refrigeration oil refrigeration return speed, thereby ensuring the lubrication effect of moving parts such as the pump body assembly, and improving the reliability of the compressor operation.

[0025] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0027] Figure 1 This is a schematic structural diagram of a compressor according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Assembly drawing of the center main bearing, muffler and oil separation structure;

[0029] Figure 3 A schematic cross-sectional view of a muffler and oil separation structure of a compressor according to another embodiment of the present invention;

[0030] Figure 4 for Figure 3 A cross-sectional schematic diagram;

[0031] Figure 5 This is a schematic structural diagram of an oil separation structure of a compressor according to another embodiment of the present invention;

[0032] Figure 6 A schematic cross-sectional view of a muffler and oil separation structure of a compressor according to another embodiment of the present invention;

[0033] Figure 7 for Figure 6 3D schematic diagram of the middle muffler;

[0034] Figure 8A schematic cross-sectional view of a main bearing, a muffler, and an oil separation structure of a compressor according to another embodiment of the present invention;

[0035] Figure 9 A schematic cross-sectional view of a pump assembly, a muffler, and an oil separation structure of a compressor according to another embodiment of the present invention;

[0036] Figure 10 This is a schematic cross-sectional view of an oil separation structure according to an embodiment of the present invention;

[0037] Figure 11 A schematic cross-sectional view of an oil separation structure according to another embodiment of the present invention;

[0038] Figure 12 Schematic cross-sectional view of an oil separation structure according to another embodiment of the present invention.

[0039] Figure Number:

[0040] Compressor body 100; housing 110; upper housing 111; lower housing 112; main housing 113; exhaust pipe 114; motor assembly 120; rotor 121; stator 122; pump assembly 130; cylinder 131; main bearing 132; auxiliary bearing 133; crankshaft 134; fourth groove 135;

[0041] Liquid reservoir 200;

[0042] Muffler 300; muffler chamber 310; exhaust port 320; second groove 330;

[0043] Oil separator structure 400; cavity 410; exhaust channel 420; exhaust hole 421; filter element 430; flat filter screen 431; filter housing 432; positioning edge 433; oil separator housing 450; recess 451; compartment 452; peripheral wall 453; bottom wall 454; fixing plate 455; protruding edge 460; first groove 461; third groove 462;

[0044] Oil drain channel 500. DETAILED DESCRIPTION

[0045] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0046] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are 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 cannot be understood as a limitation on the present invention.

[0047] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0048] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0049] Reference Figure 1 As shown, a compressor according to an embodiment of the present invention is used in a refrigeration system or heat pump system, such as an air conditioner, refrigerator, or air-to-water heater. For example, in the refrigeration system cycle of an air conditioner, the compressor serves as the power component of the refrigerant circulation. The compressor compresses the low-temperature, low-pressure gaseous refrigerant to form a high-temperature, high-pressure gaseous refrigerant. The gas then passes through the condenser to release heat, the throttling device to reduce pressure, and the evaporator to absorb heat before re-entering the compressor for the next refrigerant cycle.

[0050] Reference Figure 1As shown, the compressor of one embodiment of the present invention is a rotary compressor. The compressor of the embodiment of the present invention includes a compressor body 100 and a liquid reservoir 200. The compressor body 100 includes a shell 110, and a motor assembly 120 and a pump body assembly 130 located inside the shell 110. The shell 110 includes an upper shell 111, a lower shell 112 and a main shell 113, and the upper shell 111, the lower shell 112 and the main shell 113 are connected to form a closed space for accommodating the motor assembly 120 and the pump body assembly 130. It can be understood that the motor assembly 120 includes a rotor 121 and a stator 122, and the stator 122 and the pump body assembly 130 are fixed in the main shell 113. The pump body assembly 130 includes a cylinder 131, a main bearing 132, a secondary bearing 133 and a crankshaft 134. Cylinder 131 defines a compression chamber (not shown). A main bearing 132 and a secondary bearing 133 are connected to the axial ends of cylinder 131, thereby sealing the compression chamber. A liquid reservoir 200 provides refrigerant to pump assembly 130. Rotor 121 is connected to crankshaft 134, which is driven to rotate by motor assembly 120. Crankshaft 134 rotates stably, supported by main bearing 132 and secondary bearing 133. A piston (not shown) is positioned within cylinder 131 and rotates eccentrically relative to the center of cylinder 131, causing periodic changes in the compression chamber. This allows pump assembly 130 to complete the processes of suction, compression, and exhaust. Refrigerant is discharged through exhaust pipe 114 of upper housing 111 and then enters the refrigeration system cycle.

[0051] Reference Figure 1 and Figure 2 As shown, in a compressor according to one embodiment of the present invention, refrigerant enters the compression chamber through an air intake port (not shown) of cylinder 131 and is compressed by pump assembly 130 to a set pressure. The refrigerant is then discharged through an exhaust port (not shown) on main bearing 132. It is understood that the exhaust port may also be provided on auxiliary bearing 133, or on both main bearing 132 and auxiliary bearing 133, and this is not specifically limited herein.

[0052] To improve the noise level during the exhaust process, the compressor of this embodiment of the present invention is equipped with a muffler 300 on the outlet side of the exhaust port. Muffler 300 forms a muffler chamber 310 within the muffler 300, which reduces the noise level of the airflow at the exhaust port. Muffler 300 also has a discharge port 320, which communicates with the muffler chamber 310 and is used to discharge the gaseous refrigerant.

[0053] It is understandable that the muffler 300 can be installed on the pump body assembly 130 by welding, riveting, screwing, etc. For example, when the exhaust port is set at the main bearing 132, the muffler 300 can be fixedly connected to the main bearing 132 by bolts.

[0054] It should be noted that there are multiple friction pairs in the rotary compressor: for example, crankshaft 134-main bearing 132, crankshaft 134-secondary bearing 133, crankshaft 134-piston, piston-cylinder 131, piston-main bearing 132, piston-secondary bearing 133, piston-vane, vane-main bearing 132, vane-secondary bearing 133, etc. The existence of the above-mentioned friction pairs directly affects the friction power consumption of the compressor, and also affects the reliability and energy efficiency of the compressor. An oil pool is provided in the casing 110 of the compressor of the embodiment of the present invention, and an oil supply circuit is provided in the pump body assembly 130. Refrigerant oil is used to form an oil film at the position of the friction pair to reduce friction power consumption; and the formed oil film helps to reduce gas leakage between different pressure chambers and improve the cooling capacity of the compressor.

[0055] Therefore, the following problems exist in the compressor of the related art: 1) There is no effective separation measure for the refrigerant oil in the casing 110 of the compressor, resulting in a large amount of refrigerant oil entering the refrigeration system from the exhaust pipe 114 of the casing 110 along with the refrigerant. This part of the refrigerant oil will reach the evaporator along with the refrigerant, and the liquid refrigerant oil will be adsorbed on the copper tube surface of the evaporator, which will affect the heat exchange efficiency of the evaporator and reduce the cooling capacity; 2) The refrigerant oil discharged from the compressor with the gaseous refrigerant needs to pass through the liquid reservoir 200 to finally return to the compressor body 100, but too much liquid refrigerant oil enters the compression chamber of the pump body assembly 130 from the oil return hole of the liquid reservoir 200 (not shown in the figure), occupying the suction volume, reducing the suction volume, and liquid refrigerant oil is not easy to compress, and too much refrigerant oil will also increase useless power consumption; 3) The oil discharge volume of the compressor is high, and too much refrigerant oil is discharged from the compressor, causing the oil level of the oil pool to drop, the lubricity of friction parts such as the sliding vane to deteriorate, and the reliability of the compressor during operation to decrease.

[0056] Reference Figure 2 As shown, the compressor of the embodiment of the present invention further includes an oil separation structure 400. The oil separation structure 400 can separate the oil-gas mixture discharged from the pump body assembly 130, thereby separating liquid refrigeration oil and gaseous refrigerant. The gaseous refrigerant can be discharged into the space inside the housing 110 through the oil separation structure 400, and the refrigeration oil is filtered and then returned to the oil pool inside the housing 110.

[0057] Reference Figure 2 and Figure 3As shown, an oil separator structure 400 according to one embodiment of the present invention is fixedly connected to the muffler 300. The oil separator structure 400 is disposed on the outlet side of the muffler 300's exhaust port 320. It is understood that the oil separator structure 400 can be stably connected to the muffler 300 by welding, riveting, screwing, or other methods. A cavity 410 is formed between the oil separator structure 400 and the muffler 300. The exhaust port 320 is located within the cavity 410, i.e., the oil separator structure 400 covers the exhaust port 320. The oil-gas mixture discharged from the exhaust port 320 diffuses into the cavity 410 through the outlet side of the exhaust port 320, thereby reducing the flow rate of the oil-gas mixture and facilitating the separation of the liquid refrigerant oil and the gaseous refrigerant in the oil-gas mixture.

[0058] It is understandable that the oil separation structure 400 is also provided with an exhaust channel 420, which is connected to the volume chamber 410, and the exhaust channel 420 is used to discharge the gaseous refrigerant. The exhaust channel 420 can be set at the end of the oil separation structure 400 away from the muffler 300, and can also be set at the side wall where the oil separation structure 400 is connected to the muffler 300. The exhaust channel 420 is a porous structure or a tubular structure. A filter element 430 is provided in the exhaust channel 420. The filter element 430 can be a structure such as a filter screen or a filter membrane, which can effectively separate the liquid refrigerant oil and the gaseous refrigerant. When the oil-gas mixture passes through the exhaust channel 420, the gaseous refrigerant can pass through, while the liquid refrigerant oil is filtered.

[0059] It should be noted that the oil separation structure 400 of the embodiment of the present invention also includes an oil drain channel 500. The cross-sectional area of the oil drain channel 500 is set to be smaller than the cross-sectional area of the exhaust channel 420. Compared with the exhaust channel 420, the cross-sectional area of the oil drain channel 500 is smaller, the flow rate is greater, and the pressure loss is greater. Therefore, the oil-gas mixture will not flow out through the oil drain channel 500, but will be discharged more through the exhaust channel 420. The oil separation structure 400 of the embodiment of the present invention can improve the oil separation efficiency of the compressor, reduce the oil discharge volume, reduce the amount of refrigerant oil entering the air-conditioning system, reduce the impact on the heat exchange of the copper tube on the evaporator side, and increase the cooling capacity of the compressor. At the same time, it also reduces the power consumption generated by compressing or stirring the refrigerant oil during the operation of the pump body assembly 130, thereby improving the energy efficiency of the compressor.

[0060] It is understood that an oil drain passage 500 is provided at the connection between the oil separation structure 400 and the muffler 300. The oil drain passage 500 can be provided on the sidewall of the oil separation structure 400, such as through holes or grooves. The oil drain passage 500 can also be provided in the muffler 300, such as by providing a groove on the upper end surface of the muffler 300. The oil drain passage 500 connects the chamber 410 with the interior of the housing 110. The oil drain passage 500 can be provided below the exhaust passage 420 and spaced apart from the exhaust passage 420. After the oil-gas mixture separates within the chamber 410, the refrigerant oil flows back to the connection between the oil separation structure 400 and the muffler 300 under the action of gravity. The refrigerant oil can then be promptly returned to the oil pool within the housing 110 through the oil drain passage 500, increasing the return speed of the refrigerant oil and preventing oil shortage in the oil pool. This ensures lubrication of moving parts such as the pump assembly 130 and improves the reliability of the compressor. In addition, because the return efficiency of the refrigeration oil is guaranteed, the compressor design of the embodiment of the present invention can also reduce the amount of refrigeration oil added to the oil pool, reduce the overall weight of the compressor when it leaves the factory, and reduce the manufacturing cost of the compressor.

[0061] It should be noted that the oil separation structure 400 of the embodiment of the present invention can also be used in vertical compressors such as scroll compressors, and can also be used in horizontal compressors and other types.

[0062] Reference Figure 3 and Figure 4 As shown, in a compressor according to an embodiment of the present invention, the oil separator structure 400 includes an oil separator housing 450 and a flange 460. The oil separator housing 450 is recessed in a direction away from the discharge port 320, thereby forming a cavity 410. For example, when the oil separator structure 400 is a sheet metal part, the oil separator housing 450 can be processed by a stamping process. The flange 460 is connected to the outer peripheral edge of the oil separator housing 450, and the flange 460 can be connected to one end of the oil separator housing 450 facing the muffler 300, thereby achieving a stable connection with the muffler 300. It can be understood that the flange 460 and the oil separator housing 450 can be formed by integral manufacturing or by welding, which is not specifically limited here.

[0063] It is understood that the oil drain passage 500 can be provided on the flange 460, or on the muffler 300, or on both the flange 460 and the muffler 300. In the compressor of the embodiment of the present invention, the flange 460 is provided with a first groove 461. The first groove 461 is formed by the flange 460 being recessed away from the muffler 300. The oil drain passage 500 for recirculating the refrigerant oil is formed between the first groove 461 and the muffler 300. One end of the first groove 461 communicates with the cavity 410, and the other end of the first groove 461 communicates with the interior space of the housing 110, allowing the refrigerant oil to flow from the cavity 410 into the interior space of the housing 110 and ultimately to the oil pool at the bottom of the housing 110, thereby achieving refrigerant oil recirculation. The first groove 461 extends radially along the oil separator housing 450, thereby shortening the length of the first groove 461, reducing the distance the refrigerant oil flows, and further improving oil return efficiency. It should be noted that the number of the first groove 461 may be one, two, or more, which is not specifically limited herein. When there are multiple first grooves 461 , the multiple first grooves 461 are arranged at intervals along the circumference of the oil separator housing 450 .

[0064] Reference Figure 5 and Figure 6 As shown, it is understandable that the filter element 430 is easily deformed under the pressure impact of the gaseous refrigerant. Therefore, in the embodiment of the present invention, the positioning edge 433 of the filter element 430 is fixed between the convex edge 460 and the muffler 300, thereby making the installation structure of the filter element 430 more stable. At this time, since the positioning edge 433 of the filter element 430 mainly plays the role of fixed connection and can be understood as a part of the convex edge 460, the oil discharge channel 500 can also be understood as being defined by the first groove 461 and the muffler 300. In addition, part of the structure of the filter element 430 is located at one end of the oil discharge channel 500 located in the cavity 410. Therefore, the filter element 430 can further reduce the discharge of gaseous refrigerant from the oil discharge channel 500, further improving the separation effect of the oil separation structure 400.

[0065] Reference Figure 6 and Figure 7As shown, in another embodiment of a compressor according to the present invention, the muffler 300 is provided with a second groove 330. The second groove 330 is formed by the muffler 300 being recessed in a direction away from the protrusion 460. An oil drain passage 500 for recirculating refrigerant oil is formed between the second groove 330 and the protrusion 460. One end of the second groove 330 extends to the cavity 410, and the other end of the second groove 330 extends outside the protrusion 460. This connects the cavity 410 with the interior space of the housing 110, allowing the refrigerant oil to flow from the cavity 410 into the interior space of the housing 110 and ultimately to the oil pool at the bottom of the housing 110, achieving refrigerant oil recirculation. The second groove 330 extends radially along the muffler 300, thereby shortening the length of the second groove 330, reducing the distance the refrigerant oil flows, and further improving oil return efficiency. It should be noted that the number of second grooves 330 can be one, two, or more, and this is not specifically limited here. When a plurality of second grooves 330 are provided, the plurality of second grooves 330 are arranged at intervals along the circumferential direction of the muffler 300 .

[0066] It is understood that in another embodiment of the compressor of the present invention, the oil discharge passage 500 may also be a combination of the first groove 461 and the second groove 330. For example, the first groove 461 and the second groove 330 are arranged opposite each other along the axial direction of the crankshaft 134, thereby increasing the cross-sectional area of the oil discharge passage 500 and further improving the return flow efficiency. In addition, the first groove 461 and the second groove 330 may be staggered along the circumference of the pump body assembly 130, thereby increasing the number of oil discharge passages 500 and the total cross-sectional area of the oil discharge passages 500, thereby effectively preventing blockage of the oil discharge passages 500.

[0067] Reference Figure 8 As shown, in another embodiment of a compressor according to the present invention, an oil separator structure 400 includes an oil separator housing 450 and a flange 460. The oil separator housing 450 forms a cavity 410. The oil separator structure 400 is connected to the main bearing 132 via the flange 460, thereby achieving connection with the main bearing 132. The flange 460 can be connected to the main bearing 132 by riveting, screwing, or other means. It is understood that the flange 460 and the oil separator housing 450 can be integrally manufactured or welded, and this is not specifically limited here.

[0068] It is understood that mounting holes are defined in the flange 460 and corresponding to the muffler 300, and screws can be inserted through the mounting holes to secure the oil separation structure 400 and the muffler 300 to the main bearing 132. This provides a stable connection for the oil separation structure 400, reduces assembly difficulty, improves assembly efficiency, and reduces production costs. It should be noted that the screws may also be fasteners such as rivets and bolts, which are not specifically limited here.

[0069] It should be noted that in the oil separation structure 400 of the embodiment of the present invention, the flange 460 is provided with a third groove 462. The third groove 462 is formed by the flange 460 being recessed away from the main bearing 132. Between the third groove 462 and the main bearing 132, an oil drain channel 500 for recirculating refrigerant oil is formed. One end of the third groove 462 communicates with the chamber 410, and the other end communicates with the interior of the housing 110. This allows refrigerant oil to flow from the chamber 410 into the interior of the housing 110 and ultimately into the oil pool at the bottom of the housing 110, achieving refrigerant oil recirculation. The third groove 462 extends radially along the oil separation housing 450, thereby shortening its length, reducing the distance the refrigerant oil travels, and further improving oil return efficiency. It should be noted that the number of third grooves 462 can be one, two, or more, and this is not specifically limited here. If multiple third grooves 462 are provided, they are spaced apart along the circumference of the oil separation housing 450.

[0070] Reference Figure 9 As shown, in a compressor according to another embodiment of the present invention, the pump body assembly 130 is provided with a fourth groove 135, and the fourth groove 135 is provided on the main bearing 132 connected to the oil separation structure 400. The fourth groove 135 can be formed by milling on the upper surface of the main bearing 132. The fourth groove 135 forms an oil discharge channel 500, one end of the fourth groove 135 extends to the accommodating cavity 410, and the other end of the fourth groove 135 extends to the outer peripheral edge of the main bearing 132, so that the refrigerant oil can flow out of the accommodating cavity 410 to the outside of the pump body assembly 130, and finally be diverted to the oil pool at the bottom of the outer shell 110, so as to realize the refrigeration oil refrigeration backflow. In addition, the ridge 460 can also be provided at a position close to the peripheral wall 453 of the main bearing 132, and the fourth groove 135 can be formed by milling at an angle downward on the outer peripheral edge, which reduces the processing amount and improves the effect of diverting the refrigerant oil downward.

[0071] The fourth groove 135 extends radially along the main bearing 132, thereby shortening the length of the fourth groove 135, reducing the distance the refrigerant oil flows, and further improving oil return efficiency. It should be noted that the number of fourth grooves 135 may be one, two, or more, and this is not specifically limited here. If multiple fourth grooves 135 are provided, they are spaced apart circumferentially along the main bearing 132.

[0072] It is understood that in another embodiment of the compressor of the present invention, the oil discharge passage 500 may also be a combination of the third groove 462 and the fourth groove 135. For example, the third groove 462 and the fourth groove 135 are arranged opposite each other along the axial direction of the crankshaft 134, thereby increasing the cross-sectional area of the oil discharge passage 500 and further improving the return efficiency. In addition, the third groove 462 and the fourth groove 135 may be staggered along the circumference of the pump body assembly 130, thereby increasing the number of oil discharge passages 500 and the total cross-sectional area of the oil discharge passages 500, thereby effectively preventing blockage of the oil discharge passages 500.

[0073] Reference Figure 3 As shown, it can be understood that the exhaust channel 420 is constructed as five exhaust holes 421, and the five exhaust holes 421 are all located at one end of the oil separation structure 400 away from the exhaust port 320 along the axial direction of the crankshaft 134, that is, the exhaust holes 421 and the exhaust port 320 are spaced apart along the axial direction of the crankshaft 134. It should be noted that the number of exhaust holes 421 can also be one, two, three or more, and is not specifically limited here. The filter element 430 covers the exhaust hole 421 and separates the oil and gas mixture passing through the exhaust hole 421. Figure 4 As shown, when the refrigerant oil and gaseous refrigerant in the oil-gas mixture pass through the filter 430, the gaseous refrigerant can pass through and be discharged from the outer shell 110, and the refrigerant oil is blocked by the filter 430. Under the action of gravity, the refrigerant oil flows back and flows out through the oil drain channel 500 to the oil pool in the outer shell 110 of the compressor.

[0074] Reference Figure 3 As shown, the oil separator housing 450 is recessed at intervals around its circumference to form multiple recesses 451, creating a petal-like structure. Multiple compartments 452 are formed between the recesses 451 and the outer circumferential wall 453 of the oil separator housing 450. These compartments 452 are relatively independent and interconnected near the center of the oil separator structure 400. Each compartment 452 is provided with a corresponding exhaust hole 421, each equipped with a filter element 430, thereby separating the oil-air mixture. As can be seen, the formation of multiple compartments 452 can reduce the noise generated when the oil-air mixture is ejected from the outlet side of the exhaust port 320. When the oil-air mixture is ejected, the sound is reflected within the multiple compartments 452, extending the sound path and canceling each other out. This eliminates peaks, reduces the noise amplitude, and improves the overall noise level of the compressor.

[0075] It is understandable that the shape of the oil separator housing 450 can also be a cylinder, a polygonal column or other structures, which is not specifically limited here.

[0076] Reference Figure 3As shown, it is understood that multiple oil drain passages 500 are provided, and the oil drain passages 500 have various forms. For reference, the above embodiments can be referred to. To avoid repetition, they will not be described here. One end of each of the multiple oil drain passages 500 is connected to a corresponding compartment 452, and the other end of each of the multiple oil drain passages 500 is connected to the interior of the housing 110, thereby ensuring smooth oil drainage from the chamber 410 and achieving higher efficiency in draining the liquid refrigerant oil.

[0077] In the oil separation structure 400 of the embodiment of the present invention, it is understood that a plurality of oil drainage channels 500 are provided, and a plurality of corresponding exhaust holes 421 are also provided. The total cross-sectional area of the plurality of oil drainage channels 500 is smaller than the total cross-sectional area of the plurality of exhaust holes 421, that is, the total flow area of the oil drainage channels 500 is smaller than the total flow area of the exhaust holes 421. This allows more of the oil-gas mixture to be separated and discharged through the exhaust holes 421, and reduces the direct discharge of the oil-gas mixture from the oil drainage channels 500. It should be noted that when the oil drainage channels 500 and the exhaust holes 421 are provided in correspondence, for example, when each compartment 452 is provided with an oil drainage channel 500 and an exhaust hole 421, the cross-sectional area of the oil drainage channels 500 can be set to be smaller than the cross-sectional area of the exhaust hole 421, thereby ensuring that the oil-gas mixture is separated and discharged through the exhaust holes 421 and is not discharged through the oil drainage channels 500.

[0078] It is understandable that the cross-sectional area of the oil drain channel 500 is smaller than the cross-sectional area of the drain port 320 , that is, the total flow area of the oil drain channel 500 is smaller than the total flow area of the drain port 320 , thereby further reducing the situation where the oil-gas mixture is directly discharged from the oil drain channel 500 .

[0079] Reference Figure 6 As shown, the inner diameter of the outlet 320 is defined as d, and the minimum distance along the axial direction of the outlet 320 between the outlet 320 and the filter element 430 covering the exhaust hole 421 is defined as L, satisfying the following relationship: L ≥ 1 / 3d. When the minimum distance L between the outlet 320 and the exhaust hole 421 and the inner diameter d of the outlet 320 satisfy the above relationship, the distance between the outlet 320 and the exhaust hole 421 is maintained, and the oil-gas mixture has sufficient time to diffuse within the cavity 410. When the inner diameter of the outlet 320 increases, and other factors remain unchanged, the flow rate of the oil-gas mixture through the outlet 320 per unit time increases. Therefore, the minimum distance between the outlet 320 and the exhaust hole 421 must also be increased accordingly to ensure the diffusion of the oil-gas mixture.

[0080] It is understandable that the relationship between the inner diameter d of the discharge port 320 and the minimum distance L also satisfies L≤3d, that is, the minimum distance L along the axial direction of the discharge port 320 between the discharge port 320 and the filter element 430 covering the exhaust hole 412 cannot be too large. Since the motor assembly 120 is connected to the top of the pump body assembly 130, as the minimum distance L increases, there will be interference between the motor assembly 120 and the pump body assembly 130, or the installation position of the motor assembly 120 needs to be moved upward, resulting in an increase in the axial length of the crankshaft 134, thereby affecting the operating stability of the motor assembly 120. By limiting the upper limit value of the minimum distance L, the embodiment of the present invention can achieve reasonable installation of the motor assembly 120 and the pump body assembly 130 on the basis of ensuring sufficient diffusion of the oil-gas mixture, thereby improving the overall stability of the compressor during operation.

[0081] It is understood that the specific range of the minimum distance L can be: 5mm≤L≤20mm. This range can meet the oil-gas separation requirements of the compressor, achieve good oil separation effect, and effectively separate the refrigeration oil and gaseous refrigerant. It should be noted that when the compressor exhaust volume is small, the minimum distance L can be set towards the lower limit; when the compressor exhaust volume is large, the minimum distance L can be set towards the upper limit.

[0082] Reference Figure 6 As shown, it can be understood that in the projection plane perpendicular to the axial direction of the crankshaft 134, the exhaust hole 421 and the exhaust port 320 are spaced apart, which can increase the flow path of the oil-gas mixture in the cavity 410, avoid the oil-gas mixture from directly passing through the cavity 410, thereby increasing the effective filtering area of the filter element 430, and further improving the oil separation efficiency.

[0083] Reference Figure 10 As shown, it can be understood that the oil separator housing 450 includes a peripheral wall 453 and a bottom wall 454. The peripheral wall 453 and the bottom wall 454 can be integrally stamped and formed by sheet metal parts, thereby improving the overall strength of the oil separator structure 400. The exhaust hole 421 is provided on the bottom wall 454, and the exhaust hole 421 can be formed by punching. The filter element 430 is fixedly connected to the bottom wall 454. The filter element 430 can adopt a flat filter screen 431 of the same size as the bottom wall 454, or a flat filter screen 431 slightly smaller than the size of the bottom wall 454, as long as the exhaust holes 421 on the bottom wall 454 are covered. The filter element 430 is fixed to the bottom wall 454 by welding, clamping, riveting, etc.

[0084] Reference Figure 11As shown, the oil separator housing 450 further includes a fixing plate 455. The fixing plate 455 is fixedly connected to the planar filter 431. The planar filter 431 is fixed between the fixing plate 455 and the bottom wall 454. The fixing plate 455 and the bottom wall 454 respectively support the two ends of the planar filter 431 in the axial direction, making the structure of the planar filter 431 more stable and maintaining the shape of the planar filter 431. This prevents the planar filter 431 from being deformed and damaged by the pressure impact of the oil-gas mixture, which could lead to failure of the oil-gas separation performance.

[0085] Reference Figure 11 and Figure 12 As shown, the fixing plate 455 can be installed below the plane filter 431. As another embodiment, referring to Figure 2 、 Figure 3 and Figure 4 As shown, the fixing plate 455 can also be installed outside the cavity 410 , and the fixing plate 455 is installed above the flat filter 431 .

[0086] Reference Figure 11 As shown, the fixing plate 455 is annular and is fixedly connected to one end of the exhaust hole 421 circumferentially close to the crankshaft 134 , thereby achieving the shaping of the filter element 430 . Figure 12 As shown, to further enhance the stability of filter element 430, fixing plate 455 is disposed parallel to bottom wall 454 and has a through-hole disposed at a position corresponding to exhaust hole 421. This ensures the exhaust function of exhaust hole 421 and provides better support for filter element 430. The outer periphery of fixing plate 455 is fixedly connected to peripheral wall 453, thereby further reliably connecting fixing plate 455 to oil separator housing 450. It is understood that fixing plate 455 and peripheral wall 453 can be secured by welding, while fixing plate 455 and filter element 430 to bottom wall 454 and to fixing plate 455 can be secured by welding, riveting, or clamping.

[0087] Reference Figure 6 As shown, it can be understood that, as another embodiment, the filter element 430 is a filter housing 432 formed by a concave deformation of the filter screen, and the filter housing 432 is attached to the bottom wall 454 and the peripheral wall 453 of the oil separator housing 450. The filter housing 432 is fixedly connected to the bottom wall 454, the peripheral wall 453 or the convex edge 460 of the oil separator structure 400, so that the filter housing 432 is stably connected and the filter housing 432 can be fixed to the exhaust hole 421, thereby preventing the filter housing 432 from being deformed and damaged by the air pressure impact of the oil-gas mixture, resulting in failure of the oil-gas separation performance.

[0088] Reference Figure 7As shown, it is understood that a positioning edge 433 is provided on the outer periphery of the filter housing 432. One end of the positioning edge 433 along the axial direction of the crankshaft 134 is fixedly connected to the flange 460, and the other end is fixedly connected to the muffler 300. The connection between the positioning edge 433, the flange 460, and the muffler 300 can be welding, riveting, or other connection methods, which are not specifically limited here.

[0089] It is understood that the filter element 430 includes at least one layer of filter screen, the thickness of the filter element 430 ranges from 0.1mm to 5mm, and the mesh number of the filter screen is 50-200. The thickness and mesh number of the filter screen are set within the above range, and after the oil-gas mixture passes through the filter screen, only the gaseous refrigerant can pass normally, so that the refrigerant oil can be separated to the maximum extent, the oil separation effect is better, and the refrigerant oil and the gaseous refrigerant are effectively separated. The filter element 430 can include one layer of filter screen, two layers of filter screen or more layers of filter screen, and the two adjacent layers of filter screen can overlap completely or partially, that is, the structures of the two adjacent layers of filter screen can be the same or different, which is not specifically limited here. It is understood that if the mesh number of the filter screen is too small and the pore size of the filter screen is too large, both the refrigerant oil and the gaseous refrigerant can be discharged from the oil separation structure 400, and the oil-gas mixture cannot be separated. If the mesh size of the filter is too large and the pore size of the filter is too small, the refrigerant oil may adhere to the small pores of the filter when the oil-gas mixture passes through, and be blown out of the oil separation structure 400 under the repeated impact of the gaseous refrigerant, causing the oil discharge volume of the compressor to increase; moreover, the refrigerant oil adheres to the surface of the filter, reducing the effective filtration area of the oil separation structure 400 and reducing the oil-gas separation effect.

[0090] It is understood that the filter screen in the embodiment of the present invention is woven from steel wire with a diameter ranging from 0.1mm to 0.4mm. A filter screen made of this material has a higher structural strength, ensures oil separation, and effectively separates the refrigeration oil and gaseous refrigerant. Furthermore, using steel wire within this diameter range makes processing more convenient and reduces processing costs.

[0091] The refrigeration device of one embodiment of the present invention may be an air conditioner, a refrigerator, a freezer, or other device that implements a refrigeration cycle through a compressor. The refrigeration device of the embodiment of the present invention adopts the compressor of the above embodiment. The compressor is provided with an oil separation structure 400 connected to the pump body assembly 130 or the muffler 300. The muffler 300 covers the exhaust port provided in the pump body assembly 130, and the oil separation structure 400 covers the exhaust port 320 provided in the muffler 300. The oil separation structure 400 forms a cavity 410 and is provided with an exhaust channel 420. The oil-gas mixture discharged from the exhaust port 320 diffuses into the cavity 410 through the outlet side of the exhaust port 320, and is discharged from the oil separation structure 400 after passing through the filter element 430 of the exhaust channel 420, thereby effectively separating the refrigerant oil and the gaseous refrigerant in the oil-gas mixture, improving the oil separation efficiency of the compressor, reducing the oil discharge volume, reducing the amount of refrigerant oil entering the air-conditioning system, reducing the impact on the heat exchange of the copper tube on the evaporator side, and improving the cooling capacity of the compressor. At the same time, it also reduces the power consumption generated by compressing or stirring the refrigerant oil during the operation of the pump body assembly 130, thereby improving the energy efficiency of the compressor. Moreover, an oil drain passage 500 is provided at the connection between the oil separation structure 400 and the muffler 300 or pump body assembly 130 connected thereto, so that the refrigerant oil separated in the cavity 410 can flow back to the connection under the action of gravity, and promptly flow back to the oil pool in the compressor casing 110 through the oil drain passage 500, thereby increasing the return speed of the refrigerant oil, thereby ensuring the lubrication effect of moving parts such as the pump body assembly 130, and improving the reliability of the compressor operation.

[0092] Since the refrigeration equipment adopts all the technical solutions of the compressor of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described in detail here.

[0093] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A compressor, characterized in that include: A pump body assembly having an exhaust port; a muffler connected to the pump assembly and covering the exhaust port, the muffler being provided with an exhaust port; an oil separator structure connected to the muffler or the pump assembly, the oil separator structure covering the air outlet side of the discharge port and forming a cavity, the oil separator structure being provided with an exhaust channel and a filter element located in the exhaust channel, the exhaust channel being at least one exhaust hole, the filter element being a filter screen, the filter screen covering the exhaust hole and being fixed to the exhaust hole; An oil discharge passage is provided at a connection between the muffler or the pump assembly and the oil separation structure, and the oil discharge passage communicates with the cavity and the interior of the compressor shell.

2. The compressor according to claim 1, characterized in that: The oil separator structure includes an oil separator housing and a convex edge, the oil separator housing forms the cavity, the convex edge is connected to the outer peripheral edge of the oil separator housing, the convex edge is connected to the muffler, and the oil discharge channel is formed between the convex edge and the muffler.

3. The compressor according to claim 2, characterized in that: A first groove is provided at one end of the convex edge connected to the muffler, and the first groove forms the oil drain channel.

4. The compressor according to claim 2 or 3, characterized in that: A second groove is provided at one end of the muffler connected to the convex edge, and the second groove forms the oil drain channel.

5. The compressor according to claim 2, characterized in that: The flange and the muffler are fixed to the pump body assembly through fasteners.

6. The compressor according to claim 1, characterized in that: One end of the oil separation structure connected to the pump body assembly is provided with a convex edge, and the convex edge is provided with a third groove, and the third groove forms the oil discharge channel.

7. The compressor according to claim 1 or 6, characterized in that: A fourth groove is provided at one end of the pump body assembly connected to the oil separation structure, and the fourth groove forms the oil discharge channel. An end of the fourth groove away from the center of the oil separation structure extends to the outer periphery of the pump body assembly.

8. The compressor according to claim 1, characterized in that: The exhaust hole is provided at one end of the oil separation structure away from the exhaust port along the axial direction of the pump body assembly.

9. The compressor according to claim 8, characterized in that: In a projection plane perpendicular to the axial direction of the pump body assembly, the exhaust hole and the discharge port are spaced apart.

10. The compressor according to claim 8, characterized in that: The oil separation structure is recessed inwardly at circumferential intervals to form a plurality of compartments, and the plurality of compartments are interconnected. The oil separation structure is provided with a plurality of exhaust holes, and the plurality of exhaust holes are arranged in a one-to-one correspondence with the plurality of compartments.

11. The compressor according to claim 10, characterized in that: There are multiple oil drainage channels, and the multiple oil drainage channels are respectively connected to the corresponding compartments and the interior of the compressor shell.

12. The compressor according to claim 11, characterized in that: The total cross-sectional area of the plurality of oil discharge channels is smaller than the total cross-sectional area of the plurality of exhaust holes.

13. The compressor according to claim 2, characterized in that: The oil separator housing includes a peripheral wall, a bottom wall and a fixing plate. The exhaust passage is provided on the bottom wall. The filter is fixedly connected to the bottom wall. The fixing plate is fixedly connected to an end of the filter away from the bottom wall.

14. The compressor according to claim 2, characterized in that: The filter screen is concave and deformed to form a filter housing attached to the inner wall of the oil separator housing, and the filter housing is fixedly connected to the oil separator housing.

15. The compressor according to claim 14, characterized in that: A positioning edge is provided on the outer periphery of the filter housing, and the positioning edge, the convex edge and the muffler are fixedly connected.

16. Refrigeration equipment, characterized in that: The compressor comprises the compressor according to any one of claims 1 to 15.

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