Pump, compressor and vehicle

Abstract

A pump, a compressor and a vehicle. The pump comprises: two cylinders (100a, 100b having vane slots and back pressure chambers; a crankshaft (200) having two eccentric portions that are connected to pistons (310a, 310b); an intermediate plate (500) having an oil inlet channel that is in communication with the interiors of the cylinders (100a, 100b), wherein the oil inlet channel comprises an inlet section (510) and an outlet section (520), which are in communication with each other, two bearings (400) are arranged on two opposite sides of the two cylinders (100a, 100b) in the axial direction of the crankshaft (200) and support the crankshaft (200), an oil passage in communication with the outlet section (520) is formed between the bearings (400) and the crankshaft (200), and the oil passage is in communication with a low-pressure chamber of the compressor; and vanes (320), one end of which is located in the vane slots, and the other end of which is driven by the eccentric portions by means of the pistons (310a, 310b), wherein one end surface of each of the vanes (320) in the axial direction of the crankshaft (200) fits with the intermediate plate (500), and the vanes (320) are driven by the eccentric portions to reciprocate in the vane slots so as to control the opening and closing of the inlet section (510), so that lubricating oil in an oil sump intermittently passes through the back pressure chambers and the oil inlet channel to enter the oil passage. The intermittent supply of refrigeration oil can be realized, and the problem of the insufficient lubrication of the high-pressure chamber caused by the accumulation of the refrigeration oil in the low-pressure chamber is effectively solved.

Description

A pump body, compressor and vehicle Technical Field

[0001] This invention relates to the field of compressor technology, specifically to a pump body, a compressor, and a vehicle. Background Technology

[0002] In modern automotive high and low back pressure rotary compressors, the lubrication of refrigeration oil is crucial. However, existing compressors suffer from uneven oil supply, especially under conditions of significant difference between high and low back pressures. Refrigeration oil tends to accumulate on the low-pressure side, leading to insufficient lubrication on the high-pressure side. This, in turn, causes internal wear and compressor failure, affecting the performance and reliability of the air conditioning system. Current oil circuit designs cannot effectively address the problems of insufficient and uneven oil return on the low-pressure side, resulting in an imbalance between oil supply and return, increasing mechanical wear, and reducing compressor stability and lifespan.

[0003] Therefore, designing a lubrication scheme that can ensure a stable oil supply has become a key technical issue in improving the reliability and stability of compressors. Summary of the Invention

[0004] In view of the problems in the prior art, the purpose of the present invention is to provide a pump body, a compressor and a vehicle, which aims to overcome the difficulties of the prior art by optimizing the pump body structure and improve the problem of abnormal wear caused by uneven oil supply in high and low back pressure rotor compressors, which leads to the accumulation of refrigeration oil on the low-pressure side and the resulting lack of oil on the high-pressure side.

[0005] This invention provides a pump body for use in a compressor, the pump body comprising:

[0006] Two cylinders, each cylinder having a vane slot, the vane slot having a back pressure chamber communicating with the compressor oil sump;

[0007] The crankshaft has two eccentric parts, one of which is located in each cylinder, and each eccentric part is connected to a piston.

[0008] The intermediate plate and two bearings are arranged between the two cylinders along the axial direction of the crankshaft. The intermediate plate has an oil inlet channel that communicates with the cylinder. The oil inlet channel includes an inlet section and an outlet section that communicate with each other. The two bearings are arranged on opposite sides of the two cylinders along the axial direction of the crankshaft and support the crankshaft. An oil passage is formed between the bearings and the crankshaft that communicates with the outlet section. The oil passage is connected to the low-pressure chamber of the compressor.

[0009] The blade has one end located in the blade groove, and the other end is driven by the eccentric part of the crankshaft through the piston. One end face of the blade in the axial direction of the crankshaft is in contact with the intermediate plate. The blade is driven by the eccentric part to reciprocate in the blade groove to control the opening and closing of the inlet section, so that the lubricating oil in the oil sump intermittently enters the oil circuit through the back pressure chamber and the oil inlet channel.

[0010] In some embodiments, the opening of the inlet section is located on one end face of the intermediate plate along the axial direction of the crankshaft, and the opening and closing of the inlet section is controlled by a blade.

[0011] In some embodiments, another opening of the inlet section is located on the other end face of the intermediate plate along the axial direction of the crankshaft, and the opening and closing of the inlet section is controlled by two blades respectively.

[0012] In some embodiments, the back pressure chamber includes interconnected spring holes and through holes, and two inlet sections located on different end faces of the intermediate plate are respectively connected to adjacent spring holes and are respectively controlled to open and close by adjacent blades.

[0013] In some embodiments, the inlet section is perpendicular to the cylinder end face, the outlet section is parallel to the cylinder end face, and the oil inlet channel intermittently connects the lubricating oil in the oil sump with the oil passage.

[0014] In some embodiments, when the blades reciprocate to expose the inlet section and connect it with the back pressure chamber, the lubricating oil in the oil sump enters the oil circuit through the back pressure chamber and the oil inlet channel.

[0015] When the blades reciprocate and cover the inlet section to close it, the oil inlet channel stops supplying oil.

[0016] In some embodiments, the outlet section extends through the inner circumferential surface of the intermediate plate to form an oil outlet channel communicating with the oil circuit.

[0017] In some embodiments, the cross-sections of the inlet and outlet sections are one or more of the following shapes: circular, elliptical, square, or irregular.

[0018] Another aspect of the present invention provides a compressor, comprising a front housing assembly, a rear housing assembly, an intermediate partition, a motor component, and a pump body of any of the above. The rear housing assembly is connected to the front housing assembly on both sides of the intermediate partition. The rear housing assembly includes a high-pressure chamber, and the front housing assembly includes a low-pressure chamber. The motor component is disposed in the low-pressure chamber, the pump body is disposed in the high-pressure chamber, a crankshaft passes through the high-pressure chamber and into the low-pressure chamber and is connected to the motor component, and an oil sump is disposed in the high-pressure chamber.

[0019] Another aspect of the invention provides a vehicle including the compressor described above.

[0020] In summary, this invention uses the reciprocating motion of blades within the blade slots to control the opening and closing of the oil inlet, achieving intermittent supply of refrigeration oil. This effectively improves the problem of insufficient lubrication in the high-pressure chamber caused by refrigeration oil accumulation in the low-pressure chamber, a problem found in existing technologies. By controlling the opening and closing of the oil inlet, the oil supply is regulated, allowing adjustment of the lubricating oil flow rate according to the compressor's operating status. The intermittent oil flow design helps control the lubricating oil supply speed, preventing poor oil return due to excessively rapid oil supply, thereby improving the compressor's stability and reliability. Attached Figure Description

[0021] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0022] Figure 1 is a cross-sectional view of the pump body according to an embodiment of the present invention;

[0023] Figure 2 is a lateral sectional view of the intermediate plate according to an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the intermediate plate according to an embodiment of the present invention;

[0025] Figure 4 is a cross-sectional view of the pump body according to another embodiment of the present invention;

[0026] Figure 5 is a lateral sectional view of the intermediate plate according to another embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of the pump body oil inlet channel when it is open according to an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of the pump body oil inlet channel when closed according to an embodiment of the present invention;

[0029] Figure 8 is a cross-sectional view of the compressor according to an embodiment of the present invention.

[0030] Wherein, 100a-first cylinder, 100b-second cylinder, 110-through hole, 110a-first through hole, 110b-second through hole, 120a-first spring hole, 120b-second spring hole, 200-crankshaft, 310a-first piston, 310b-second piston, 320-blade, 320a-first blade, 320b-second blade, 400-bearing, 400a-first bearing, 400b-second bearing, 500-intermediate plate, 510-inlet section, 510a-first inlet section, 510b-second inlet section, 520-outlet section, 600-front housing assembly, 610-motor component, 700-intermediate partition plate, 800-rear housing assembly, 810-oil sump. Detailed Implementation

[0031] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand the other advantages and effects of this application from the content disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0032] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0033] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0034] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] For the purpose of clearly describing this application, devices that are not relevant to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0036] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0037] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0038] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present application, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0039] In high and low back pressure compressors, the refrigerant flow path is typically as follows: refrigerant is drawn in through the suction port, enters the high-pressure side from the low-pressure side, is compressed by the compressor's pump body, and its temperature and pressure gradually increase. When the refrigerant pressure reaches a certain value, it is released through the discharge port and leaves the compressor. To ensure effective lubrication of the moving parts inside the compressor, especially the rotating parts connecting the bearings and crankshaft, an oil sump is installed on the high-pressure side, and oil is supplied to the low-pressure side through the high-pressure side. This process provides the necessary lubrication for the rotating parts of the pump body. Simultaneously, during operation, the return oil flow path formed inside the compressor allows the refrigerant oil to flow back from the low-pressure side to the high-pressure side.

[0040] However, the existing oil supply and return method has certain problems. Because the oil supply from the high- and low-pressure sides relies on the pressure difference, the supply process is fast and powerful, but the return path is long and has significant flow resistance (i.e., the oil needs to flow back from the low-pressure side to the high-pressure side). This asymmetry between supply and return disrupts the circulation balance of the compressor's oil circuit system, resulting in an excessively fast supply rate and a slow return rate. This problem becomes more pronounced when the compressor operates over a wide range of conditions, further affecting the compressor's reliability and stability, thus reducing the overall performance of the refrigeration system.

[0041] This invention provides a pump body for use in a compressor, mainly comprising key components such as cylinders, crankshaft, intermediate plate, bearings, and blades. The pump body has two cylinders, each containing a blade slot, which is connected to the compressor's oil sump via a back pressure chamber. The cylinder structure is designed to provide sufficient space to accommodate the movement of the blades. The crankshaft has two eccentric portions, each located within one of the cylinders and connected to a piston. The intermediate plate is located between the two cylinders, axially aligned with the crankshaft. The intermediate plate has an oil inlet channel, including an inlet section and an outlet section. Two bearings are positioned axially along the crankshaft on opposite sides of the two cylinders, supporting the crankshaft. An oil passage is formed between the bearings and the crankshaft, communicating with the outlet section and connected to the compressor's low-pressure chamber. One end of each blade is located within a blade slot, while the other end is driven by the eccentric portion of the crankshaft via a piston. One axial end of the blade is in contact with the intermediate plate. Driven by the eccentric part of the crankshaft, the blades reciprocate, controlling the opening and closing of the oil inlet channel. This allows refrigeration oil to intermittently enter the oil circuit through the back pressure chamber and the oil inlet channel, providing lubrication. By adjusting the opening and closing state of the oil inlet channel, the supply of refrigeration oil is intermittent, which effectively prevents oil accumulation in the low-pressure chamber. The lubricating oil lubricates various friction pairs, such as relatively moving bearings, cylinders, intermediate plates, blades, and pistons, improving the problem of insufficient lubrication in the high-pressure chamber caused by uneven oil supply in existing technologies.

[0042] Figure 1 is a cross-sectional view of the pump body according to an embodiment of the present invention. Figure 2 is a side cross-sectional view of the intermediate plate according to an embodiment of the present invention. Figure 3 is a structural schematic diagram of the intermediate plate according to an embodiment of the present invention. As shown in Figures 1, 2 and 3, in one embodiment, the pump body includes two cylinders, such as a first cylinder 100a and a second cylinder 100b, for containing and compressing refrigerant gas. Each cylinder is provided with a vane slot, and each vane slot is connected to the oil sump of the compressor through a back pressure chamber. The pump body also includes a crankshaft 200, which has two eccentric portions. Each eccentric portion is located in a corresponding cylinder, and a piston is sleeved on the outside of the eccentric portion, such as the first piston 310a in the first cylinder 100a and the second piston 310b in the second cylinder 100b. The crankshaft 200 drives the piston and vanes, such as the second piston 310b driving the second vane 320b, to reciprocate through the movement of the eccentric portions. When the crankshaft 200 rotates, the eccentric portions drive the piston to move, and the movement of the piston further drives the reciprocating movement of the vanes. An intermediate plate 500 is axially positioned between two cylinders along the crankshaft. The intermediate plate 500 has an oil inlet channel communicating with the cylinder, consisting of an inlet section 510 and an outlet section 520. For example, the second cylinder 100b has a second inlet section 510b and an outlet section 520. Two bearings are respectively positioned on opposite sides of the two cylinders along the crankshaft 200, supporting the rotation of the crankshaft. An oil passage is formed between the bearings and the crankshaft, communicating with the outlet section 520, and this oil passage is connected to the low-pressure chamber of the compressor. One end of a blade is located in a blade slot, and the other end is connected to the eccentric portion of the crankshaft 200 via a piston. For example, the first blade 320a located in the first cylinder 100a is connected to the eccentric portion of the crankshaft 200 via a first piston 310a. One side of the blade is in contact with the end face of the intermediate plate 500. For example, the second blade 320b is in contact with the end face of the intermediate plate 500 located on the side of the second cylinder 100b. Under the action of the crankshaft 200, the blade reciprocates within the blade slot, thereby controlling the opening and closing of the oil inlet channel. In this embodiment, the back pressure chamber allows the lubricating oil in the oil sump to flow to the corresponding cylinder and oil inlet channel when the pump body is working, thereby achieving lubrication of the friction pair and finally supplying it to the low-pressure chamber through the oil circuit. The pump body controls the opening and closing of the oil inlet section 510 through the reciprocating motion of the blades, allowing the lubricating oil to enter the oil circuit intermittently, avoiding excessive accumulation of oil in the low-pressure chamber. By intermittently controlling the supply of lubricating oil, effective lubrication of the internal friction pair of the compressor is ensured, improving the operating stability and service life of the compressor.

[0043] In some optional embodiments, the opening of the inlet section 510 is located on one end face of the intermediate plate 500 along the axial direction of the crankshaft 200, and the opening and closing of the inlet section 510 is controlled by a blade. Specifically, as shown in FIG1, the opening of the second inlet section 510b is located on the end face of the intermediate plate 500 along the axial direction of the crankshaft 200 on the side of the second cylinder 100b. The second piston 310b drives the second blade 320b to reciprocate within the blade groove through connection with the eccentric part of the crankshaft 200, and the opening and closing of the second inlet section 510b is controlled by the second blade 320b. The embodiments of the present invention are not limited thereto. In other embodiments, the inlet section 510 may also be located on the end face of the intermediate plate 500 on the side of the first cylinder 100a, and its opening and closing may be controlled by the reciprocating motion of the first blade 320a. The embodiments of the present invention do not limit the specific location of the oil inlet channel inlet section 510 on the intermediate plate 500. Those skilled in the art can design the opening position of the inlet section 510 on the intermediate plate according to the lubrication requirements of different pump bodies and the matching relationship between the inlet section 510 and the blade back pressure chamber.

[0044] In some optional embodiments, another opening of the inlet section 510 is located on the other end face of the intermediate plate 500 along the axial direction of the crankshaft 200, and the opening and closing of the inlet section 510 is controlled by two blades respectively. Figure 4 is a cross-sectional view of the pump body of an embodiment of the present invention. Figure 5 is a lateral cross-sectional view of the intermediate plate of the present invention. As shown in Figures 4 and 5, the intermediate plate 500 has openings of inlet sections 510 with oil inlet channels on both end faces of the first cylinder 100a and the second cylinder 100b, namely the first inlet section 510a and the second inlet section 510b. Similar to the above embodiments, the first inlet section 510a is controlled to open and close by the reciprocating motion of the first blade 320a, and the second inlet section 510b is controlled to open and close by the reciprocating motion of the second blade 320b. Both the first inlet section 510a and the second inlet section 510b are connected to the outlet section 520. However, the present invention is not limited thereto. In other embodiments, an outlet section 520 connected to each inlet section 510 can be designed separately according to different design requirements. The opening and closing of the first inlet section 510a is controlled by the reciprocating motion of the first blade 320a. This embodiment of the invention, by providing multiple oil inlet channels in the inlet section 510 on the intermediate plate 500, with each inlet section 510 controlled by an independent blade, effectively optimizes the supply of lubricating oil in the compressor cylinder. This flexible oil supply method can be adapted to the needs of different compressor structures or operating conditions, exhibiting strong versatility and adjustability.

[0045] In some optional embodiments, the back pressure chamber includes interconnected spring holes and through holes. Two inlet sections located on different end faces of the intermediate plate are respectively connected to adjacent spring holes and are controlled to open and close by adjacent blades. In this embodiment, the back pressure chamber includes a first through hole 110a and a first spring hole 120a in the lower part of the blade slot of the first cylinder 100a, and a second through hole 110b and a second spring hole 120b in the lower part of the blade slot of the second cylinder 100b. Within each cylinder, the communication between the through hole and the spring hole in the lower part of the blade slot and the compressor oil sump allows lubricating oil to flow through the through hole and the spring hole, thereby maintaining a certain oil pressure within the blade slot and ensuring that oil enters the oil inlet channel when the blade-controlled inlet section opens. In this way, the lubricating oil can ensure good lubrication of the compressor's friction pairs and other components, avoiding excessive wear and malfunctions. During the implementation of this embodiment, the design of the back pressure chamber and the opening and closing control method of the inlet section can be adjusted according to specific compressor design requirements. For example, the size, shape, and position of the through holes and spring holes in the back pressure chamber can be appropriately varied according to the cylinder size and operating conditions to achieve a better oil distribution effect. At the same time, the material, shape, and mating method of the blades with the piston can be adjusted according to the actual usage requirements of the compressor.

[0046] In some alternative embodiments, the outlet section 520 supplies oil through the lubrication path of the inlet section 510. In this embodiment, the outlet section 520 is a blind hole or a blocked through-hole, and the outlet section 520 does not directly contact the lubricating oil in the oil sump connected through the lubricating oil path of the back pressure chamber. Instead, the lubricating oil in the outlet section 520 is supplied through the lubrication path of the inlet section 510. As shown in Figure 2, a blind hole is a hole that does not penetrate the outer peripheral surface of the intermediate plate 500. As shown in Figure 5, a through-hole is a hole that penetrates the outer peripheral surface of the intermediate plate 500, but a blocking structure is used to block the end of the hole penetrating the outer peripheral surface of the intermediate plate 500, so that the outlet section 520 does not have a direct communication channel with the refrigeration oil, but the lubricating oil is supplied through the inlet section 510. By designing different forms of outlet section 520 as blind holes or blocked through holes, and using them in conjunction with the lubrication path of inlet section 510, the intermittent flow of lubricating oil can be effectively controlled, ensuring that the lubricating oil can enter the oil circuit according to the design requirements, and avoiding direct connection with oil channels that do not need to be contacted.

[0047] In some optional embodiments, the inlet section 510 is perpendicular to the cylinder end face, and the outlet section 520 is parallel to the cylinder end face, with the oil inlet channel intermittently connecting the lubricating oil in the oil sump to the oil passage. In this embodiment, the inlet section 510 is perpendicular to the cylinder end face, allowing the lubricating oil to directly enter the oil passage and maintain flow stability. The parallel alignment of the outlet section 520 with the cylinder end face further ensures that there are no unnecessary changes or resistance during the lubricating oil flow, guaranteeing stable oil flow. Due to the vertical design of the inlet section 510, the oil can directly enter the oil passage without extensive contact with the cylinder wall, reducing friction loss. The parallel flow of the oil through the outlet section 520 ensures uniform lubrication.

[0048] In some optional embodiments, the outlet section 520 extends through the inner circumferential surface of the intermediate plate 500 to form an oil outlet channel communicating with the oil passage. This oil outlet channel is, for example, an oil outlet hole. In this embodiment, the oil outlet hole is connected to the oil passage, ensuring that the lubricating oil can directly enter the oil passage and continue to flow. This embodiment ensures that the lubricating oil flows from the inlet section 510 through the outlet section 520 and finally into the oil passage through the oil outlet hole, forming a closed lubricating oil flow channel, ensuring the continuity and stability of the lubrication effect.

[0049] In some optional embodiments, the cross-sections of the inlet section 510 and the outlet section 520 can be one or more of the following shapes: circular, elliptical, square, or irregular. In this embodiment, the flow path and flow rate of the oil can be adjusted by changing the cross-sectional shape of the inlet section 510 and the outlet section 520. Different cross-sectional shapes (such as circular, elliptical, square, or irregular shapes) will have different effects on the flow resistance, flow rate, and distribution of the oil. For example, a circular cross-section usually has lower flow resistance and is suitable for supplying lubricating oil with a larger flow rate, while an elliptical or square cross-section may be suitable for scenarios where flow rate or pressure needs to be controlled. Irregular cross-sections may be used in specific designs to optimize the oil flow characteristics. When selecting the cross-sectional shape of the inlet section 510 and the outlet section 520, the design can be customized according to the specific operating requirements and spatial layout of the compressor; this embodiment of the invention does not impose specific limitations.

[0050] In some optional embodiments, when the blade 320 reciprocates, exposing the inlet section 510 and connecting it to the back pressure chamber, the lubricating oil in the oil sump enters the oil circuit through the back pressure chamber and the oil inlet channel; when the blade 320 reciprocates, covering the inlet section 510 and closing it, the oil inlet channel stops supplying oil. Figure 6 is a schematic diagram of the pump body when the oil inlet channel is open. Figure 7 is a schematic diagram of the pump body when the oil inlet channel is closed. As shown in Figure 6, the blade 320 is connected to the crankshaft 200 via a piston and reciprocates within the blade slot as the crankshaft 200 rotates. When the blade 320 moves upward as shown in Figure 6, the inlet section 510 is exposed and connects to the through hole 110 of the back pressure chamber. At this time, the lubricating oil in the oil sump enters the oil circuit through the back pressure chamber and the oil inlet channel, thereby entering the various friction pairs within the pump body for lubrication. As shown in Figure 7, when the blade 320 moves downwards as shown in Figure 7, the inlet section 510 is covered by the blade 320, the opening of the oil inlet channel is closed, and the communication between the inlet section 510 and the through hole 110 of the back pressure chamber is blocked by the blade 320, stopping the supply of lubricating oil to the oil inlet channel. In this embodiment, the area of ​​the blade end face covering the oil inlet reaches more than 70%, but this embodiment of the invention is not limited to this. The back pressure chamber, through its structure connected to the oil sump, can receive and store lubricating oil. When the blade 320 controls the inlet section 510 to be exposed, the oil in the back pressure chamber is guided to the oil inlet channel, and then transmitted to the lubrication part of the compressor through the oil circuit. The design of the back pressure chamber ensures that the oil can be stored under a certain pressure, ensuring stable flow and pressure during the oil supply process.

[0051] Figure 8 is a cross-sectional view of a compressor according to an embodiment of the present invention. As shown in Figure 8, the present invention also provides a compressor, including a front housing assembly 600, a rear housing assembly 800, an intermediate partition 700, a motor component 610, and the aforementioned pump body. The rear housing assembly 800 is connected to the front housing assembly 600 on both sides of the intermediate partition 700. The rear housing assembly 800 includes a high-pressure chamber, and the front housing assembly 600 includes a low-pressure chamber. The motor component 610 is disposed in the low-pressure chamber, the pump body is disposed in the high-pressure chamber, and the crankshaft 200 passes through the high-pressure chamber and is connected to the motor component 610 in the low-pressure chamber. An oil sump 810 is disposed in the high-pressure chamber. In this embodiment of the present invention, the crankshaft 200 drives the piston and blades, for example, the second piston 310b drives the second blade 320b to reciprocate. When the crankshaft 200 rotates, the eccentric portion pushes the piston to reciprocate, and the movement of the piston further drives the blades to reciprocate. An intermediate plate 500 is axially positioned between two cylinders along the crankshaft. The intermediate plate 500 has an oil inlet channel communicating with the cylinder, consisting of an inlet section 510 and an outlet section 520. For example, the end face of the intermediate plate 500 facing the second cylinder 100b has a second inlet section 510b and an outlet section 520. Two bearings are respectively positioned on opposite sides of the two cylinders along the crankshaft 200 and support the rotation of the crankshaft 200. An oil passage is formed between the bearings and the crankshaft, communicating with the outlet section 520, and this oil passage is connected to the low-pressure chamber of the compressor. One end of a blade is located in a blade slot, and the other end is connected to the eccentric portion of the crankshaft 200 via a piston. For example, the first blade 320a located in the first cylinder 100a is connected to the eccentric portion of the crankshaft 200 via a first piston 310a. One side of the blade is in contact with the end face of the intermediate plate 500. For example, the second blade 320b is in contact with the end face of the intermediate plate 500 located on the side of the second cylinder 100b. Under the action of the crankshaft 200, the blade reciprocates within the blade slot, thereby controlling the opening and closing of the oil inlet section 510. During pump operation, the lubricating oil in the oil sump 810 flows intermittently to the corresponding cylinder and oil inlet channel, and is ultimately supplied to the low-pressure chamber through the oil circuit, thus lubricating the friction pairs. It then flows back to the oil sump through the corresponding return oil path, completing the oil supply and return cycle to lubricate the compressor and pump components. The pump body controls the opening and closing of the oil inlet section 510 through the reciprocating motion of the blades, allowing lubricating oil to enter the oil circuit intermittently. This avoids excessive oil accumulation in the low-pressure chamber. By intermittently controlling the supply of lubricating oil, effective lubrication of the internal friction pairs of the compressor is ensured, improving the compressor's operational stability and service life.

[0052] The present invention also provides a vehicle including the compressor of any of the above embodiments. The vehicle may further include a refrigeration system, which includes a compressor. The refrigeration system is used to provide cold or hot air to the vehicle body to ensure the comfort of the vehicle interior environment.

[0053] This invention proposes an improved technical solution to address the problems existing in the prior art. It optimizes the oil supply and return process within the compressor, achieving a balance between oil supply and return through a more rational oil circuit design and control mechanism. This, in turn, improves the compressor's operational stability and reliability under different operating conditions. The technical solution described in this invention, through innovative structural design and working principle, solves the problem of unbalanced oil supply and return in traditional compressors while simultaneously enhancing the compressor's overall performance and long-term stable operation capability.

[0054] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A pump body used in a compressor, characterized in that, The pump body includes: Two cylinders, each cylinder having a vane slot, the vane slot having a back pressure chamber communicating with the compressor oil sump; A crankshaft having two eccentric portions, with one eccentric portion located in each cylinder, and each eccentric portion connected to a piston; An intermediate plate and two bearings are provided. The intermediate plate is disposed between the two cylinders along the axial direction of the crankshaft. The intermediate plate has an oil inlet channel communicating with the cylinder. The oil inlet channel includes an inlet section and an outlet section that communicate with each other. The two bearings are disposed on opposite sides of the two cylinders along the axial direction of the crankshaft and support the crankshaft. An oil passage is formed between the bearings and the crankshaft and communicates with the outlet section. The oil passage is communicated with the low-pressure chamber of the compressor. The blade has one end located in the blade groove, and the other end of the blade is driven by the eccentric part of the crankshaft through the piston. One end face of the blade in the axial direction of the crankshaft is in contact with the intermediate plate. The blade is driven by the eccentric part to reciprocate in the blade groove to control the opening and closing of the inlet section, so that the lubricating oil in the oil sump intermittently enters the oil circuit through the back pressure chamber and the oil inlet channel.

2. The pump body according to claim 1, characterized in that, The opening of the inlet section is located on one end face of the intermediate plate along the axial direction of the crankshaft, and the opening and closing of the inlet section is controlled by one of the blades.

3. The pump body according to claim 2, characterized in that, Another opening of the inlet section is located on the other end face of the intermediate plate along the axial direction of the crankshaft, and the opening and closing of the inlet section is controlled by two blades respectively.

4. The pump body according to claim 3, characterized in that, The back pressure chamber includes interconnected spring holes and through holes. The two inlet sections located on different end faces of the intermediate plate are respectively connected to adjacent spring holes and are controlled to open and close by adjacent blades.

5. The pump body according to any one of claims 1-4, characterized in that, The inlet section is perpendicular to the end face of the cylinder, the outlet section is parallel to the end face of the cylinder, and the oil inlet channel intermittently connects the lubricating oil in the oil sump with the oil circuit.

6. The pump body according to claim 1, characterized in that, When the blade reciprocates and exposes the inlet section, which then connects with the back pressure chamber, the lubricating oil in the oil sump enters the oil circuit through the back pressure chamber and the oil inlet channel. When the blades reciprocate and cover the inlet section to close it, the oil inlet channel stops supplying oil.

7. The pump body according to claim 1, characterized in that, The outlet section extends through the inner circumferential surface of the intermediate plate to form an oil outlet channel that communicates with the oil circuit.

8. The pump body according to claim 1, characterized in that, The inlet section and the outlet section have cross-sections that are circular, elliptical, square, or irregular in shape or one or more.

9. A compressor, characterized in that, The device includes a front housing assembly, a rear housing assembly, an intermediate partition, a motor component, and a pump body according to any one of claims 1-8. The rear housing assembly is connected to the front housing assembly on both sides of the intermediate partition. The rear housing assembly includes a high-pressure chamber, and the front housing assembly includes a low-pressure chamber. The motor component is disposed in the low-pressure chamber, the pump body is disposed in the high-pressure chamber, the crankshaft passes through the high-pressure chamber into the low-pressure chamber and is connected to the motor component, and the oil sump is disposed in the high-pressure chamber.

10. A vehicle, characterized in that, Includes the compressor as described in claim 9.

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