Pump body, compressor and vehicle

Abstract

The invention discloses a pump body, a compressor and a vehicle. The invention provides a pump body, which is applied to a compressor, and comprises two air cylinders, a pump body and a pump body, the crankshaft is provided with two eccentric parts connected with the piston; the middle plate is provided with an oil inlet channel communicated with the interiors of the air cylinders, the oil inlet channel comprises an inlet section and an outlet section which are communicated with each other, the two bearings are arranged on the two opposite sides of the two air cylinders in the axial direction of the crankshaft and support the crankshaft, an oil way communicated with the outlet section is formed between the bearings and the crankshaft, and the oil way is communicated with a low-pressure cavity of the compressor; one end of each blade is located in the corresponding blade groove, the other end of each blade is driven by the eccentric part through the piston, one end face, in the axial direction of the crankshaft, of each blade is attached to the middle plate, the blades are driven by the eccentric parts to reciprocate in the blade grooves so as to control opening and closing of the inlet section, and lubricating oil in the oil pool intermittently enters the oil way through the back pressure chamber and the oil inlet channel. Intermittent supply of the refrigerating machine oil is achieved, and the problem that in the prior art, due to the fact that the refrigerating machine oil accumulates in the low-pressure cavity, the high-pressure cavity is insufficient in lubrication is solved.

Description

Technical Field

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

[0002] In modern automotive high and low back pressure rotor compressors, the lubrication of refrigeration oil is crucial. However, existing compressors have the problem of uneven oil supply. Especially under conditions with large differences in high and low back pressures, refrigeration oil tends to accumulate on the low-pressure side, resulting in insufficient lubrication on the high-pressure side, which in turn causes internal wear and compressor failure, affecting the performance and reliability of the air-conditioning system. The current oil circuit design cannot effectively solve the problems of insufficient oil return and uneven flow on the low-pressure side, resulting in an imbalance in oil supply and return, increased mechanical wear, and reduced compressor stability and service life.

[0003] Therefore, designing a lubrication solution that can ensure stable oil supply has become a key technical issue to improve the reliability and stability of the compressor. Summary of the invention

[0004] In response to 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 in the prior art that refrigeration oil accumulates on the low-pressure side due to uneven oil supply in high and low back-pressure rotor compressors, thereby causing abnormal wear due to lack of oil on the high-pressure side.

[0005] The present invention provides a pump body, which is applied to a compressor, comprising:

[0006] Two cylinders, each cylinder having a blade slot, the blade slot being provided with a back pressure chamber communicating with a compressor oil pool;

[0007] A crankshaft, wherein the crankshaft has two eccentric parts, one eccentric part is provided in each cylinder, and each eccentric part is connected to a piston;

[0008] An intermediate plate and two bearings, wherein the intermediate plate is arranged between the two cylinders along the axial direction of the crankshaft, the intermediate plate has an oil inlet passage communicating with the cylinder, the oil inlet passage includes an inlet section and an outlet section communicating 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 communicating with the outlet section is formed between the bearings and the crankshaft, and the oil passage is communicated with the low-pressure chamber of the compressor;

[0009] 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 fits with the middle plate. The blade is driven by the eccentric part to make reciprocating motion in the blade groove to control the opening and closing of the inlet section, so that the lubricating oil in the oil pool 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 arranged at an end surface 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 provided at another end surface of the intermediate plate along the axial direction of the crankshaft, and the opening and closing of the inlet section are respectively controlled by two blades.

[0012] In some embodiments, the back pressure chamber includes spring holes and through holes that are interconnected, and two inlet sections disposed on different end surfaces of the middle 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 end face of the cylinder, the outlet section is parallel to the end face of the cylinder, and the oil inlet passage intermittently connects the lubricating oil in the oil pool with the oil circuit.

[0014] In some embodiments, when the blade reciprocates to expose the inlet section and communicate with the back pressure chamber, the lubricating oil in the oil pool enters the oil circuit through the back pressure chamber and the oil inlet channel;

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

[0016] In some embodiments, the outlet section is penetrated to the inner hole circumference of the middle plate to form an oil outlet hole connected to the oil circuit.

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

[0018] Another aspect of the present invention also provides a compressor, including a front housing assembly, a rear housing assembly, a middle partition, a motor component and a pump body of any of the above items, the rear housing assembly and the front housing assembly are connected to both sides of the middle partition, the rear housing assembly includes a high-pressure chamber, and the front housing assembly includes a low-pressure chamber; the motor component is arranged in the low-pressure chamber, the pump body is arranged 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 pool is arranged in the high-pressure chamber.

[0019] Another aspect of the present invention provides a vehicle including the above-mentioned compressor.

[0020] In summary, the present invention uses the reciprocating motion of the blade in the blade groove to control the opening and closing of the oil inlet, realizes the intermittent supply of refrigeration oil, and effectively improves the problem of insufficient lubrication of the high-pressure chamber caused by the accumulation of refrigeration oil in the low-pressure chamber in the prior art. By controlling the opening and closing of the oil inlet, the regulation of oil supply is realized, and the flow rate of lubricating oil can be adjusted according to the working state of the compressor. The intermittent oil flow design helps to control the supply speed of lubricating oil and prevents the oil return from being blocked due to too fast oil supply, thereby improving the stability and reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

[0028] Figure 7 2 is a schematic structural diagram of a pump body oil inlet passage when it is closed according to an embodiment of the present invention;

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

[0030] Among them, 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-vane, 320a-first vane, 320b-second vane, 400-bearing, 400a-first bearing, 400b-second bearing, 500-middle plate, 510-inlet section, 510a-first inlet section, 510b-second inlet section, 520-outlet section, 600-front housing assembly, 610-motor component, 700-middle partition, 800-rear housing assembly, 810-oil pool. DETAILED DESCRIPTION

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

[0032] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0033] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.

[0036] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0037] It should be further understood that the terms "comprises" and "includes" indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, 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" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0038] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0039] In high and low back pressure compressors, the flow path of the refrigerant is usually as follows: the refrigerant is sucked in by the air intake port, the refrigerant enters the high pressure side from the low pressure side, is compressed through the pump body of the compressor, and its temperature and pressure gradually increase. When the pressure of the refrigerant reaches a certain value, it will be released through the exhaust port and leave the compressor. In order to ensure that the moving parts inside the compressor, especially the connecting and rotating positions of the bearings and crankshafts can be effectively lubricated, the compressor is equipped with an oil pool on the high pressure side and supplies oil to the low pressure side through the high pressure side. This process can provide the necessary lubrication effect for the rotating parts of the pump body. At the same time, during the working process, the return oil flow path formed inside the compressor allows the refrigeration oil to flow back from the low pressure side to the high pressure side.

[0040] However, in the prior art, this oil supply and return method has certain problems. Since the oil supply of the oil pool on the high and low pressure sides depends on the high and low pressure difference, the oil supply process is fast and powerful, but the oil return path is long and there is a large flow resistance (that is, the oil needs to flow back from the low pressure side to the high pressure side). This asymmetry of oil supply and oil return leads to the destruction of the circulation balance of the compressor oil circuit system, which is manifested as too fast oil supply rate and slow oil return rate. Especially when the compressor has a large operating range, this problem becomes more obvious, and the imbalance between oil supply and oil return further affects the reliability and stability of the compressor, thereby reducing the overall performance of the refrigeration system.

[0041] The embodiment of the present invention provides a pump body, which is applied to a compressor and mainly includes a cylinder, a crankshaft, an intermediate plate, and key components such as bearings and blades. The pump body has two cylinders, each of which is provided with a blade groove, and the blade groove is connected to the oil pool of the compressor through a back pressure chamber. The structural design of the cylinder is intended to provide a suitable space to accommodate the movement of the blade. The crankshaft has two eccentric parts, each of which is located in the above cylinders and connected to a piston. The intermediate plate is located between the two cylinders and is arranged along the axial direction of the crankshaft. An oil inlet channel is provided on the intermediate plate, and the oil inlet channel includes an inlet section and an outlet section. Two bearings are arranged on opposite sides of the two cylinders along the axial direction of the crankshaft and support the crankshaft. An oil path connected to the outlet section is formed between the bearings and the crankshaft, and the oil path is connected to the low-pressure chamber of the compressor. One end of the blade is located in the blade groove, and the other end is driven by the eccentric part of the crankshaft through the piston. One end of the blade in the axial direction of the crankshaft fits with the intermediate plate. The blades reciprocate under the drive of the eccentric part of the crankshaft, controlling the opening and closing of the oil inlet channel, so that the refrigeration oil intermittently enters the oil circuit through the back pressure chamber and the oil inlet channel and provides lubrication. By adjusting the opening and closing state of the oil inlet channel, the supply of refrigeration oil is intermittent, which can effectively avoid the accumulation of oil in the low-pressure chamber. The lubricating oil lubricates each friction pair such as the relatively moving bearings, cylinders, intermediate plates, blades and pistons and other parts or surfaces, improving the problem of insufficient lubrication of the high-pressure chamber due to uneven oil supply in the prior art.

[0042] Figure 1 2 is a cross-sectional view of a pump body according to an embodiment of the present invention. Figure 2 4 is a lateral cross-sectional view of the intermediate plate according to the embodiment of the present invention. Figure 3 Schematic diagram of the structure of the intermediate plate of an embodiment of the present invention. Figure 1 , Figure 2 and Figure 3As shown, the pump body of the present invention is applied to a compressor, and the pump body includes: two cylinders, such as a first cylinder 100a and a second cylinder 100b, for accommodating and compressing refrigerant gas, each cylinder is provided with a blade groove, and each blade groove is connected to the oil pool of the compressor through a back pressure chamber. A crankshaft 200 is also provided in the pump body, and the crankshaft 200 has two eccentric parts. Each eccentric part is located in a corresponding cylinder, and a piston is sleeved on the outer side of the eccentric part, 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 the blades through the movement of the eccentric part, such as the second piston 310b drives the second blade 320b to reciprocate. When the crankshaft 200 rotates, the eccentric part drives the piston to move, and the movement of the piston further drives the reciprocating movement of the blade. The middle plate 500 is arranged between the two cylinders along the axial direction of the crankshaft. The middle plate 500 has an oil inlet passage connected to the cylinder, and the oil inlet passage is composed of an inlet section 510 and an outlet section 520. For example, the second cylinder 100b is provided with a second inlet section 510b and an outlet section 520. Two bearings are arranged on opposite sides of the two cylinders along the axial direction of the crankshaft 200 to support the rotation of the crankshaft. An oil passage connected to the outlet section 520 is formed between the bearing and the crankshaft, and the oil passage is connected to the low-pressure chamber of the compressor. One end of the blade is located in the blade groove, and the other end is connected to the eccentric part of the crankshaft 200 through a piston. For example, the first blade 320a located in the first cylinder 100a is connected to the eccentric part of the crankshaft 200 through the first piston 310a. One side of the blade fits with the end surface of the middle plate 500, such as the second blade 320b fits with the end surface of the middle plate 500 located on the second cylinder 100b side. Under the action of the crankshaft 200, the blade reciprocates in the blade groove, thereby controlling the opening and closing of the oil inlet channel. In this embodiment, the back pressure chamber is set so that the lubricating oil in the oil pool flows to the corresponding cylinder and the 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 inlet section 510 of the oil inlet channel through the reciprocating motion of the blade, so that the lubricating oil can intermittently enter the oil circuit, avoiding excessive accumulation of oil in the low-pressure chamber. By intermittently controlling the supply of lubricating oil, the effective lubrication of the friction pair inside the compressor is guaranteed, and the operating stability and service life of the compressor are improved.

[0043] In some optional embodiments, the opening of the inlet section 510 is provided at an end surface 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. Figure 1As shown, the opening of the second inlet section 510b is arranged on the end surface of the middle plate 500 located on the side of the second cylinder 100b along the axial direction of the crankshaft 200, and the second piston 310b drives the second blade 320b to reciprocate in the blade groove by connecting 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 embodiment of the present invention is not limited to this, and the inlet section 510 can also be opened on the end surface of the middle plate 500 located on the side of the first cylinder 100a, and the opening and closing is controlled by the reciprocating motion of the first blade 320a accordingly. The embodiment of the present invention does not limit the specific position of the inlet section 510 of the oil inlet channel on the middle plate 500, and those skilled in the art can design the opening position of the inlet section 510 on the middle 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 provided at another end surface of the intermediate plate 500 along the axial direction of the crankshaft 200 , and the opening and closing of the inlet section 510 are controlled by two blades respectively. Figure 4 2 is a cross-sectional view of a pump body according to an embodiment of the present invention. Figure 5 2 is a lateral cross-sectional view of the intermediate plate of the present invention. Figure 4 and Figure 5 The intermediate plate 500 shown in the figure has openings of the inlet section 510 of the oil inlet passage on its two end surfaces located at the first cylinder 100a and the second cylinder 100b, which are the first inlet section 510a and the second inlet section 510b, respectively. 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. The first inlet section 510a and the second inlet section 510b are both connected to the outlet section 520, but the present invention is not limited thereto. According to different design requirements, an outlet section 520 connected to each inlet section 510 can be separately designed. The first inlet section 510a is controlled to open and close by the reciprocating motion of the first blade 320a. In the embodiment of the present invention, by arranging a plurality of inlet sections 510 of the oil inlet passage on the intermediate plate 500, and each inlet section 510 is controlled to open and close by an independent blade, the supply of lubricating oil in the compressor cylinder can be effectively optimized. The flexible design of this oil supply method can be adapted according to the requirements of different compressor structures or working conditions, and has strong versatility and adjustability.

[0045] In some optional embodiments, the back pressure chamber includes spring holes and through holes that are interconnected, and two inlet sections arranged on different end surfaces of the middle plate are respectively connected to adjacent spring holes and are respectively controlled to open and close by adjacent blades. In this embodiment, the back pressure chamber includes a through hole 110a and a spring hole 120a at the lower part of the blade slot of the first cylinder 100a and a through hole 110b and a spring hole 120b at the lower part of the blade slot of the second cylinder 100b. In each cylinder, the connectivity between the through hole and the spring hole at the lower part of the blade slot and the compressor oil pool allows the lubricating oil to flow through the through hole and the spring hole, thereby maintaining a certain oil pressure in the blade slot and ensuring that the oil enters the oil inlet channel when the blade control inlet section is opened. In this way, the lubricating oil can ensure a good lubrication state of the friction pair and other components of the compressor to avoid excessive wear and failure. In 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 accordingly according to the specific compressor design requirements. For example, the size, shape and position of the through hole and spring hole in the back pressure chamber can be appropriately changed according to the size and working conditions of the cylinder to achieve a better oil distribution effect. At the same time, the material, shape and matching method of the blade with the piston can be adjusted according to the actual use requirements of the compressor.

[0046] In some optional embodiments, the outlet section 520 is supplied with 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 lubrication oil in the oil pool connected to the lubrication oil path of the back pressure chamber. Instead, the lubrication oil of the outlet section 520 is supplied through the lubrication path of the inlet section 510. Figure 2 As shown in FIG. 5 , a blind hole is a hole that does not penetrate the outer peripheral surface of the intermediate plate 500. Figure 5 As shown, the through hole is a hole that penetrates the outer peripheral surface of the middle plate 500, but the end of the hole that penetrates the outer peripheral surface of the middle plate 500 is blocked by a blocking structure, so that the outlet section 520 has no direct communication channel with the refrigeration oil, but the lubricating oil is supplied through the inlet section 510. By designing different forms of the outlet section 520 as a blind hole or a blocked through hole, and using it in conjunction with the lubrication path of the inlet section 510, the intermittent flow of the 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 the oil channel that does not need to be contacted.

[0047] In some optional embodiments, the inlet section 510 is perpendicular to the cylinder end face, the outlet section 520 is parallel to the cylinder end face, and the oil inlet passage intermittently connects the lubricating oil in the oil pool with the oil circuit. In this embodiment, the inlet section 510 is perpendicular to the cylinder end face, so that the lubricating oil can directly enter the oil circuit and maintain the stability of the flow. The outlet section 520 is parallel to the cylinder end face to further ensure that there are no unnecessary changes or resistances in the flow of the lubricating oil, and to ensure the stable flow of the oil. Due to the vertical design of the inlet section 510, the oil can directly enter the oil circuit after entering without large-area contact with the cylinder wall, thereby reducing friction loss. The oil flows in parallel through the outlet section 520, ensuring the uniformity of lubrication.

[0048] In some optional embodiments, the outlet section 520 is penetrated to the inner hole circumference of the middle plate 500 to form an oil outlet hole connected to the oil circuit. In this embodiment, the oil outlet hole is connected to the oil circuit to ensure that the lubricating oil can directly enter the oil circuit and continue to flow. This embodiment ensures that the lubricating oil passes from the inlet section 510 through the outlet section 520 and finally flows into the oil circuit 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-section of the inlet section 510 and the outlet section 520 can be one or more of circular, elliptical, square, and 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. Cross-sections of different shapes (such as circular, elliptical, square or irregular) will have different effects on the flow resistance, flow rate, distribution, etc. of the oil. For example, a circular cross-section usually has a smaller 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 the flow rate or pressure needs to be controlled. Irregular cross-sections may be used to optimize the flow characteristics of the oil in a specific design. 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 working requirements and spatial layout of the compressor, and the embodiment of the present invention does not make specific limitations.

[0050] In some optional embodiments, when the blade 320 reciprocates to expose the inlet section 510 and connect it to the back pressure chamber, the lubricating oil in the oil pool enters the oil circuit through the back pressure chamber and the oil inlet channel; when the blade 320 reciprocates to cover the inlet section 510 to close it, the oil inlet channel stops taking in oil. Figure 6 It is a schematic structural diagram of the present invention when the oil inlet passage of the pump body is opened. Figure 7 Schematic diagram of the structure of the pump body when the oil inlet channel of the present invention is closed. Figure 6 As shown, the blade 320 is connected to the crankshaft 200 through the piston, and reciprocates in the blade slot as the crankshaft 200 rotates. Figure 6When the pump moves upward, the inlet section 510 will be exposed and connected to the through hole 110 of the back pressure chamber. At this time, the lubricating oil in the oil pool enters the oil circuit through the back pressure chamber and the oil inlet channel, and then enters the friction pairs in the pump body to achieve lubrication. Figure 7 As shown, when the blade 320 is Figure 7 When the inlet section 510 moves downward in the back pressure chamber, the inlet section 510 is covered by the blade 320, the opening of the oil inlet channel is closed, and the connection 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 oil inlet port covered by the blade end is more than 70%, but the embodiments of the present invention are not limited to this. The back pressure chamber can receive and store lubricating oil through a structure connected to the oil pool. 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 the stability of the flow rate and pressure during the oil supply process.

[0051] Figure 8 2 is a cross-sectional view of a compressor according to an embodiment of the present invention. Figure 8As shown, an embodiment of the present invention further provides a compressor, including a front housing assembly 600, a rear housing assembly 800, a middle partition 700, a motor component 610 and the above-mentioned pump body, wherein the rear housing assembly 800 and the front housing assembly 600 are connected to both sides of the middle 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 arranged in the low-pressure chamber, the pump body is arranged in the high-pressure chamber, the crankshaft 200 is passed through the high-pressure chamber and is arranged in the low-pressure chamber and connected to the motor component 610, and the oil pool 810 is arranged in the high-pressure chamber. In an embodiment of the present invention, the crankshaft 200 drives the piston and the 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 blade to reciprocate. The middle plate 500 is arranged between the two cylinders along the axial direction of the crankshaft. The middle plate 500 has an oil inlet passage connected to the cylinder. The oil inlet passage is composed of an inlet section 510 and an outlet section 520. For example, the end surface of the middle plate 500 facing the second cylinder 100b is provided with a second inlet section 510b and an outlet section 520. Two bearings are respectively arranged on opposite sides of the two cylinders along the axial direction of the crankshaft 200 and support the crankshaft 200 to support the rotation of the crankshaft. An oil passage connected to the outlet section 520 is formed between the bearing and the crankshaft, and the oil passage is connected to the low-pressure chamber of the compressor. One end of the blade is located in the blade groove, and the other end is connected to the eccentric part of the crankshaft 200 through a piston. For example, the first blade 320a located in the first cylinder 100a is connected to the eccentric part of the crankshaft 200 through the first piston 310a. One side of the blade is fitted with the end surface of the middle plate 500, for example, the second blade 320b is fitted with the end surface of the middle plate 500 located on the second cylinder 100b side. Under the action of the crankshaft 200, the blade reciprocates in the blade groove, thereby controlling the opening and closing of the inlet section 510 of the oil inlet channel. When the pump body is working, the lubricating oil in the oil pool 810 intermittently flows to the corresponding cylinder and the oil inlet channel, and is finally supplied to the low-pressure cavity through the oil circuit, thereby realizing the lubrication of the friction pair, and then flows back to the oil pool through the corresponding oil return flow path to complete the oil supply and oil return cycle to realize the lubrication of the compressor and pump body parts. The pump body controls the opening and closing of the inlet section 510 of the oil inlet channel through the reciprocating motion of the blade, so that the lubricating oil can intermittently enter the oil circuit, avoiding excessive accumulation of oil in the low-pressure cavity, and by intermittently controlling the supply of lubricating oil, the effective lubrication of the friction pair inside the compressor is guaranteed, and the operating stability and service life of the compressor are improved.

[0052] An embodiment of the present invention also provides a vehicle, including the compressor of any of the above embodiments. The vehicle may also include a refrigeration system, the refrigeration system includes a compressor, and the refrigeration system is used to provide cold air or hot air into the vehicle body, thereby ensuring the comfort of the environment inside the vehicle.

[0053] The present invention proposes an improved technical solution to the problems existing in the prior art, optimizes the oil supply and return process of the lubricating oil inside the compressor, and achieves a balance between oil supply and oil return through a more reasonable oil circuit design and control mechanism, thereby improving the operating stability and reliability of the compressor under different working conditions. The technical solution described in the present invention solves the problem of unbalanced oil supply and return of lubricating oil in traditional compressors through innovative structural design and working principle, while improving the overall performance of the compressor and its ability to operate stably for a long time.

[0054] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A pump body, applied to a compressor, characterized in that: include: Two cylinders, each of which has a vane slot, and each vane slot is provided with a back pressure chamber connected to the compressor oil pool; A crankshaft, wherein the crankshaft has two eccentric parts, one of the eccentric parts is arranged in each cylinder, and each of the eccentric parts is connected to a piston; An intermediate plate and two bearings, wherein the intermediate plate is arranged between the two cylinders along the axial direction of the crankshaft, the intermediate plate has an oil inlet passage communicating with the cylinder, the oil inlet passage comprises an inlet section and an outlet section communicating 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 communicating with the outlet section is formed between the bearings and the crankshaft, and the oil passage is communicated with the low-pressure chamber of the compressor; A blade, one end of the blade is located in the blade groove, the other end of the blade is driven by the eccentric part of the crankshaft through the piston, an end face of the blade in the axial direction of the crankshaft is in contact with the intermediate plate, and the blade is driven by the eccentric part to make reciprocating motion in the blade groove to control the opening and closing of the inlet section, so that the lubricating oil in the oil pool 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 arranged at an end surface 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 arranged at another end surface of the intermediate plate along the axial direction of the crankshaft, and the opening and closing of the inlet section are respectively controlled by the two blades.

4. The pump body according to claim 3, characterized in that: The back pressure chamber comprises a spring hole and a through hole which are interconnected, and the two inlet sections arranged on different end surfaces of the middle plate are respectively connected to adjacent spring holes and are respectively controlled to open and close by adjacent blades.

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

6. The pump body according to claim 1, characterized in that: When the blade reciprocates to expose the inlet section and communicate with the back pressure chamber, the lubricating oil in the oil pool enters the oil circuit through the back pressure chamber and the oil inlet channel; When the blades reciprocate to cover the inlet section to close it, the oil inlet passage stops inletting oil.

7. The pump body according to claim 1, characterized in that: The outlet section is penetrated to the inner hole circumference of the middle plate to form an oil outlet channel which is communicated with the oil circuit.

8. The pump body according to claim 1, characterized in that: The cross-sections of the inlet section and the outlet section may be one or more of circular, elliptical, square, and irregular shapes.

9. A compressor, characterized in that: It includes a front housing assembly, a rear housing assembly, a middle partition, a motor component and a pump body according to any one of claims 1 to 8, wherein the rear housing assembly and the front housing assembly are connected to both sides of the middle partition, the rear housing assembly includes a high-pressure chamber, and the front housing assembly includes the low-pressure chamber; the motor component is arranged in the low-pressure chamber, the pump body is arranged 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 pool is arranged in the high-pressure chamber.

10. A vehicle, characterized in that: Comprising the compressor as claimed in claim 9.

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