Rear cover of swash plate type compressor

Abstract

The utility model relates to a vehicle compressor, in particular to a rear cover of a swash plate type compressor, which comprises a rear cover body, an air inlet cavity and an air outlet cavity are arranged in the rear cover body, the rear cover body is hermetically connected with a cylinder body through a sealing structure, and a partition plate is arranged between the air inlet cavity and the air outlet cavity. The air inlet channel is arranged on the rear cover body and is communicated with the air inlet cavity; the air outlet channel is arranged on the rear cover body and is communicated with the air outlet cavity; the partition plate is provided with a pressure relief channel, so that when the gas pressure in the gas outlet cavity is larger than a critical threshold value, fluid in the gas outlet cavity is subjected to pressure relief in the direction of the gas inlet cavity. By means of the structure, the pressure relief channel used for pressure relief is arranged between the air inlet cavity and the air outlet cavity, overlarge pressure is avoided, meanwhile, the pressure can be reused, high operation efficiency is achieved, loss of refrigerants is reduced, and loss of refrigerating or heating efficiency is reduced.

Description

Technical Field

[0001] This utility model relates to an automotive compressor, and more particularly to a swashplate compressor rear cover. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] Common compressor types include reciprocating, rotary, scroll, and swashplate compressors. Among them, swashplate compressors, due to their compact design and multi-cylinder design, have the reciprocating motion of the piston distributed in multiple cylinders, making the compression process smoother, with relatively lower vibration and noise, making them more suitable for use in automobiles.

[0004] Existing swashplate compressors typically have both the intake and exhaust channels located on the side of the rear cover. The intake channel connects to the intake chamber located inside the rear cover, while the exhaust channel connects to the exhaust chamber located outside the rear cover. The exhaust chamber surrounds the intake chamber, and some parts of the exhaust chamber are far from the exhaust channel. During use, this can cause high-pressure refrigerant to accumulate in certain areas, leading to excessive local pressure and affecting exhaust stability. This local overpressure is difficult to transmit to the exhaust channel, causing the external pressure relief valve connected to the exhaust channel to fail to open properly and perform its pressure relief function, potentially even damaging the compressor.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a swashplate compressor rear cover that, by setting a pressure relief channel between the intake and exhaust chambers, can avoid excessive pressure while also allowing for pressure reuse, thus achieving high operating efficiency.

[0007] To achieve the above objectives, this utility model discloses the following swashplate compressor rear cover; the swashplate compressor rear cover includes:

[0008] The rear cover body has an air inlet chamber and an air outlet chamber. The rear cover body and the cylinder are sealed together by a sealing structure. A partition is provided between the air inlet chamber and the air outlet chamber.

[0009] An air intake channel is provided on the rear cover body and communicates with the air intake chamber;

[0010] An air outlet channel is provided on the rear cover body and communicates with the air outlet chamber;

[0011] The partition is provided with a pressure relief channel so that when the gas pressure in the outlet chamber is greater than a critical threshold, the fluid in the outlet chamber will be depressurized towards the inlet chamber.

[0012] Furthermore, a pressure relief valve is installed in the pressure relief channel. The pressure relief valve has a critical threshold. When the gas pressure in the outlet chamber is greater than the critical threshold, the pressure relief valve opens when the pressure on the pressure relief valve is greater than the critical threshold, and the inlet chamber and the outlet chamber are connected.

[0013] Furthermore, the pressure relief channel is configured to penetrate the partition.

[0014] Furthermore, the axial sidewalls of the air intake channel and the air outlet channel are arranged adjacent to each other.

[0015] Furthermore, the air intake channel includes a first air intake section and a second air intake section, the second air intake section being connected between the first air intake section and the air intake chamber, and the diameter of the second air intake section being smaller than the diameter of the first air intake section; or the diameter of the air intake channel gradually increases from the end connected to the air intake chamber to the other end.

[0016] Furthermore, the air outlet channel includes a first air outlet section and a second air outlet section, the second air outlet section being connected between the first air outlet section and the air outlet cavity, and the diameter of the second air outlet section being smaller than the diameter of the first air outlet section; or the diameter of the air outlet channel gradually increases from the end connected to the air outlet cavity to the other end.

[0017] Furthermore, the sealing structure is configured as a metal-rubber composite plate, and one side wall of the pressure relief channel is disposed adjacent to the metal-rubber composite plate.

[0018] This utility model also discloses a swashplate compressor, which includes the aforementioned swashplate compressor rear cover, as well as a front cover and a cylinder, wherein the cylinder is axially sealed between the front cover and the swashplate compressor rear cover.

[0019] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0020] This utility model's swashplate compressor rear cover features a pressure relief channel between the inlet and outlet chambers. During compressor operation, when the outlet chamber pressure becomes excessive, the pressure can be released towards the inlet chamber through this channel, transferring pressure and preventing the impact of localized pressure buildup on exhaust stability. This also enables pressure reuse, resulting in higher operating efficiency. In other words, this design prevents the pressure relief valve from failing to open properly due to localized overpressure, thus avoiding reduced exhaust efficiency and even compressor damage. Furthermore, it allows for pressure reuse with a short return path, reducing refrigerant loss compared to conventional methods that rely solely on external pressure relief valves. Additionally, a pressure relief valve can be installed within the relief channel to release pressure when a set threshold is reached, further reducing pressure loss during exhaust and minimizing efficiency losses during cooling or heating.

[0021] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a front view of the rear cover of a swashplate compressor provided in the embodiments of this specification;

[0024] Figure 2 This is a cross-sectional schematic diagram of the rear cover of a swashplate compressor provided in the embodiments of this specification;

[0025] Figure 3 This is a partial schematic diagram of the pressure relief channel of the rear cover of a swashplate compressor provided in the embodiments of this specification;

[0026] In the diagram: 100, cylinder block; 200, front cover; 1, rear cover body; 11, intake chamber; 12, exhaust chamber; 13, sealing structure; 14, partition; 141, pressure relief passage; 2, intake passage; 3, exhaust passage. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0029] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0030] Please see Figure 1-3 This is a swashplate compressor rear cover according to this embodiment, used to connect to the cylinder block 100 of the swashplate compressor; wherein the swashplate compressor rear cover includes:

[0031] The rear cover body 1 has an air inlet chamber 11 and an air outlet chamber 12 inside. The rear cover body 1 and the cylinder 100 are sealed together by a sealing structure 13. A partition 14 is provided between the air inlet chamber 11 and the air outlet chamber 12.

[0032] Air intake channel 2 is located on the rear cover body 1 and is connected to the air intake chamber 11;

[0033] Air outlet channel 3 is located on the rear cover body 1 and is connected to the air outlet chamber 12;

[0034] The partition 14 is provided with a pressure relief channel so that when the gas pressure in the outlet chamber 12 is greater than the critical threshold, the pressure can be released towards the inlet chamber 11.

[0035] With the above structure, during operation, when the swashplate compressor is turned on, the intake passage 2 draws in low-temperature, low-pressure gas from the external pipe under the action of the piston. The gas flows through the intake chamber 11 and then into the piston-driven cylinder. The swashplate compressor shaft continues to rotate, driving the corresponding piston to compress the low-temperature, low-pressure gas in the cylinder. This causes the low-temperature, low-pressure gas to transform into a high-temperature, high-pressure state during compression and is forced into the outlet chamber 12. The high-temperature, high-pressure refrigerant then flows through the outlet chamber 12 and enters the outlet passage 3 connected to it. The intake chamber 11 is primarily configured as a low-pressure region in this embodiment, while the outlet chamber 12 is a high-pressure region.

[0036] In the above process, with the existing structure, there may be a situation where the high-pressure refrigerant fluid may accumulate locally, causing excessive local pressure. In this embodiment, in order to deal with the above situation, a pressure relief channel 141 is provided on the partition 14 between the intake chamber 11 and the outlet chamber 12. When the pressure in the outlet chamber 12 is too high, the outlet chamber 12 can relieve pressure towards the intake chamber 11 through the pressure relief channel 141 to transfer the pressure. This avoids the impact on exhaust stability caused by local pressure accumulation. At the same time, during the process of pressure transfer from the outlet chamber 12 to the intake chamber 11, the pressure in the corresponding intake chamber 11 is directly increased, realizing the reuse of pressure. Compared with the existing pressure relief method that only transfers the pressure of the intake chamber 11 to the outside, it is more energy-efficient and helps to improve compression efficiency.

[0037] Furthermore, a pressure relief valve is installed in the pressure relief channel 141. This valve has a critical threshold, so that when the gas pressure in the outlet chamber exceeds the critical threshold, the valve opens, allowing pressure to be released from the outlet chamber towards the inlet chamber 11. When the gas pressure in the outlet chamber 12 is below the critical threshold, the valve closes, completely isolating the outlet chamber 12 from the inlet chamber 11. The pressure relief valve effectively controls the specific amount of pressure adjustment and exchange between the inlet chamber 11 and the outlet chamber 12, contributing to improved operational stability of the swashplate compressor. Specifically, the aforementioned isolation state means that the inlet chamber 11 and the outlet chamber 12 are not interconnected, preventing the refrigerant from freely moving between them. In other words, under normal operating conditions, the pressure relief valve is closed; however, in cases of excessive local pressure, the valve opens to release pressure and prevent structural damage caused by excessive local pressure.

[0038] Furthermore, the pressure relief channel 141 is disposed through the partition 14. Meanwhile, in this embodiment, the air outlet chamber 12 is located within... Figure 1The cross-section of the angle is set to be approximately trapezoidal, and the edges are chamfered. The pressure relief channel 141 is set as a vertical tube extending along one side of the trapezoid. The vertical structure and the body share one side, which makes the pressure relief channel 141 provide less resistance to the pressure transfer between the air inlet chamber 11 and the air outlet chamber 12, and avoids the refrigerant under high temperature and high pressure being restricted by the structure and causing poor flow.

[0039] Furthermore, the axial sidewalls of the intake passage 2 and the outlet passage 3 are arranged adjacent to each other. There is no gap between the outer axial sidewalls of the two or no gap between their inner axial sidewalls. Compared with the method of setting the intake passage 2 and the outlet passage 3 separately, this effectively reduces the size of the compressor and also effectively reduces the sealing area, reducing the sealing difficulty, thereby further improving the stability of compressor operation.

[0040] Furthermore, the intake passage 2 includes a first intake section and a second intake section, with the second intake section connecting the first intake section and the intake chamber 11. The diameter of the second intake section is smaller than that of the first intake section; or the diameter of the intake passage 2 gradually increases from the end connected to the intake chamber 11 to the other end. Similarly, the exhaust passage 3 includes a first exhaust section and a second exhaust section, with the second exhaust section connecting the first exhaust section and the exhaust chamber 12. The diameter of the second exhaust section is smaller than that of the first exhaust section; or the diameter of the exhaust passage 3 gradually increases from the end connected to the exhaust chamber 12 to the other end. Through the above structural arrangement, the pressure value of the airflow entering the compressor cylinder through the intake passage 2 can be effectively increased, enhancing the subsequent compression effect, and also effectively reducing noise during the airflow discharge process.

[0041] Furthermore, the sealing structure 13 is configured as a metal-rubber composite plate, and one side wall of the pressure relief channel 141 is disposed adjacent to the metal-rubber composite plate. In other words, in this embodiment, one side of the pressure relief channel 141 is the metal structure of the rear cover body 1, and the other side is the rubber structure of the sealing structure 13, which are joined together. The combination of the sealing structure 13 and the rear cover body 1 facilitates assembly and subsequent cleaning and maintenance of the various pipes in the rear cover body 1. Specifically, in this embodiment, the metal-rubber composite plate can be configured as a combination of nitrile rubber and cold-rolled carbon steel plate.

[0042] like Figure 2 The diagram shows a complete embodiment of a swashplate compressor, including a rear cover, a front cover 200, and a cylinder 100. The cylinder 100 is axially sealed between the front cover 200 and the rear cover. It also includes components such as a main shaft, swashplate, piston, cylinder, and valve plate. The main piston performs gas compression primarily within the cylinder formed inside the cylinder 100.

[0043] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0044] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0045] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A slant-plate compressor rear cover; characterized in that, The rear cover of the swashplate compressor includes: The rear cover body has an air inlet chamber and an air outlet chamber. The rear cover body and the cylinder are sealed together by a sealing structure. A partition is provided between the air inlet chamber and the air outlet chamber. An air intake channel is provided on the rear cover body and communicates with the air intake chamber; An air outlet channel is provided on the rear cover body and communicates with the air outlet chamber; The partition is provided with a pressure relief channel so that when the gas pressure in the outlet chamber is greater than a critical threshold, the fluid in the outlet chamber will be depressurized towards the inlet chamber.

2. The rear cover of the swashplate compressor according to claim 1, characterized in that: A pressure relief valve is installed in the pressure relief channel. The pressure relief valve has a critical threshold. When the pressure on the pressure relief valve is greater than the critical threshold, the pressure relief valve opens. The air inlet chamber and the air outlet chamber are connected.

3. The rear cover of the swashplate compressor according to claim 1, characterized in that: The pressure relief channel is provided through the partition.

4. The rear cover of the swashplate compressor according to claim 1, characterized in that: The axial sidewalls of the air intake channel and the air outlet channel are arranged adjacent to each other.

5. The rear cover of the swashplate compressor according to claim 1, characterized in that: The air intake channel includes a first air intake section and a second air intake section, the second air intake section being connected between the first air intake section and the air intake chamber, and the diameter of the second air intake section being smaller than the diameter of the first air intake section; or the diameter of the air intake channel gradually increases from the end connected to the air intake chamber to the other end.

6. The rear cover of the swashplate compressor according to claim 1, characterized in that: The air outlet channel includes a first air outlet section and a second air outlet section, the second air outlet section being connected between the first air outlet section and the air outlet cavity, and the diameter of the second air outlet section being smaller than the diameter of the first air outlet section; or the diameter of the air outlet channel gradually increases from the end connected to the air outlet cavity to the other end.

7. The rear cover of the swashplate compressor according to claim 1, characterized in that: The sealing structure is a metal-rubber composite plate, and one side wall of the pressure relief channel is located adjacent to the metal-rubber composite plate.

8. A swashplate compressor, characterized in that, Includes a swashplate compressor rear cover as described in any one of claims 1-7, a front cover, and a cylinder, the cylinder being axially sealed between the front cover and the swashplate compressor rear cover.

Images