CO2 automobile air conditioner compressor suction and exhaust integrated upper cylinder cover

Abstract

The utility model discloses a CO2 automobile air conditioner compressor suction and exhaust integrated upper cylinder cover, including upper cylinder cover main part. The CO2 automobile air conditioner compressor suction and exhaust integrated upper cylinder cover, through the setting of gas storage cavity, primary cylinder exhaust port and secondary cylinder suction port, when using, open one gas storage cavity on the upper cylinder cover main part, is used for storing the compressed gas of primary cylinder exhaust, then directly opens the secondary cylinder suction port in the gas storage cavity, the secondary cylinder suction port is connected with the air inlet hole of secondary cylinder, and the compressed refrigerant gas in the gas storage cavity can directly enter the secondary cylinder of compressor and compresses again, and the discharge and suction process of refrigerant gas is completed in the upper cylinder cover main part, the internal space of compressor is greatly saved, and the suction and exhaust process of upper cylinder cover main body is simplified, and since the gas storage cavity is on the cylinder cover, the refrigerant gas does not need to pass through other components, and the sealing performance is more reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of compressor cylinder head, specifically to an integrated intake and exhaust cylinder head for a CO2 automotive air conditioning compressor. Background Technology

[0002] In automotive air conditioning systems, compressors using CO2 as a refrigerant have received widespread attention due to their environmental advantages. To meet the requirements of high-efficiency compression, CO2 compressors often employ a two-stage compression structure. The refrigerant gas is first compressed in the first-stage cylinder, then discharged, and subsequently drawn into the second-stage cylinder for a second compression, ultimately achieving the required high pressure.

[0003] In this two-stage compression process, the compressor's upper cylinder head is a critical component, its main function being to guide and contain the high-pressure refrigerant gas discharged from the first-stage cylinder. In existing technologies, the gas discharged from the first-stage cylinder typically needs to first enter an additional connecting chamber or pipe, separate from the upper cylinder head, for temporary storage and transition before being guided to the intake port of the second-stage cylinder. This separate design has several inherent drawbacks: First, the additional chamber and connecting pipe occupy valuable internal space of the compressor, resulting in a larger overall compressor size, which is detrimental to the compact layout requirements of automotive engine compartments; second, the increased number of connection interfaces between multiple components complicates the sealing structure, placing more stringent demands on sealing performance and increasing the risk of refrigerant leakage; finally, the flow of gas between multiple independent components easily generates flow resistance losses and potential gas leakage, affecting the overall operating efficiency and reliability of the compressor. Utility Model Content

[0004] The technical problem this utility model aims to solve is as follows: It provides a CO2 automotive air conditioning compressor with an integrated intake and exhaust cylinder head that is highly practical, easy to operate, and structurally simple. This solves the problem mentioned in the background section regarding two-stage compression rotary compressors, where the refrigerant gas discharged after compression by the first-stage cylinder is drawn into the second-stage cylinder for further compression. The compressor cylinder head is primarily used to discharge the refrigerant gas compressed by the first-stage cylinder. However, in general, the compressed refrigerant gas discharged from the upper cylinder requires an additional cavity for storage before being drawn into the second-stage cylinder. This method occupies a certain amount of space in the compressor, making its overall size larger, and consequently, the cavity sealing requirements are more stringent, and it is also necessary to prevent gas leakage within the cavity.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A CO2 automotive air conditioning compressor with integrated intake and exhaust upper cylinder head includes an upper cylinder head body, an air storage cavity is provided on one side of the upper cylinder head body, a primary cylinder exhaust port is installed in the middle of the air storage cavity, and a secondary cylinder intake port is provided on the inner edge of one side of the air storage cavity.

[0007] As a further aspect of this utility model: both the exhaust port of the first-stage cylinder and the intake port of the second-stage cylinder are fitted with annular sealing rings. The annular sealing rings are made of fluororubber. The fluororubber sealing rings can effectively seal the tiny gaps between the first-stage exhaust chamber and the external interface, preventing leakage of high-pressure CO2 refrigerant gas, which is the basis for ensuring the normal operating pressure of the compressor.

[0008] As a further embodiment of this utility model: a connecting block is fixedly connected to the inner top of the exhaust port of the first-stage cylinder and the intake port of the second-stage cylinder. A placement hole is opened inside the connecting block, and an anti-backflow mechanism is installed inside the placement hole. The anti-backflow mechanism facilitates the prevention of gas backflow.

[0009] As a further embodiment of this utility model: the anti-backflow mechanism includes a fixed cylinder installed inside the placement hole, a torsion spring fixedly connected to one side of the fixed cylinder, a rotating column fixedly connected to one side of the torsion spring, and a baffle fixedly connected to one side of the rotating column. The baffle adopts a structure of circular baffle plate combined with torsion spring, which opens under positive gas pressure and closes by torsion spring force when the pressure disappears or reverses.

[0010] As a further embodiment of this utility model: the rotating column is rotatably connected to the inside of the fixed cylinder, and the upper surface of the baffle has two mounting holes that are adapted to the rotating column. The mounting holes facilitate the support and fixation of the rotating column. The rotating column rotates inside the fixed cylinder on one side and drives the torsion spring installed inside to undergo elastic deformation.

[0011] As a further embodiment of this utility model: a locking block is fixedly connected to the bottom of one of the baffles. The locking block is adapted to a slot opened on the surface of the exhaust port of the first-stage cylinder. The slot facilitates the limiting of the locking block, thereby preventing the baffle from rotating in the opposite direction.

[0012] As a further embodiment of this utility model: a positioning plate is threadedly connected to the lower surface of the intake port of the secondary cylinder, and a threaded post is threadedly connected to the surface of the positioning plate. One side of the positioning plate overlaps with one side of the baffle. The positioning plate facilitates the limiting of the baffle, allowing gas to enter only from one direction and blocking the normal flow of reverse airflow.

[0013] The beneficial effects of this utility model are:

[0014] With the configuration of a gas storage chamber, a primary cylinder exhaust port, and a secondary cylinder intake port, during operation, a gas storage chamber is opened on the upper cylinder head body to store the compressed gas discharged from the primary cylinder. Then, the secondary cylinder intake port is directly opened in the gas storage chamber and connected to the intake port of the secondary cylinder. The compressed refrigerant gas in the gas storage chamber can directly enter the secondary cylinder of the compressor for further compression. At this time, the refrigerant gas discharge and intake process is completed in the upper cylinder head body. This upper cylinder head body greatly saves the internal space of the compressor and simplifies the intake and exhaust process of the upper cylinder head body. Since its gas storage chamber is on the cylinder head itself, the refrigerant gas does not need to pass through other components, and the sealing performance is more reliable. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the anti-backflow mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the positioning plate structure of this utility model.

[0020] In the diagram: 1. Upper cylinder head body; 2. Air storage chamber; 3. First-stage cylinder exhaust port; 4. Second-stage cylinder intake port; 5. Annular sealing ring; 6. Anti-backflow mechanism; 601. Fixed cylinder; 602. Torsion spring; 603. Rotating column; 604. Baffle; 7. Locking block; 8. Positioning plate; 9. Threaded column; 10. Connecting block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-4As shown, a CO2 automotive air conditioning compressor with an integrated intake and exhaust upper cylinder head includes an upper cylinder head body 1. A gas storage chamber 2 is provided on one side of the upper cylinder head body 1. Through the arrangement of the gas storage chamber 2, the first-stage cylinder exhaust port 3, and the second-stage cylinder intake port 4, during operation, a gas storage chamber 2 is provided on the upper cylinder head body 1 to store the compressed gas discharged from the first-stage cylinder. Then, the second-stage cylinder intake port 4 is directly provided within the gas storage chamber 2 and is connected to the intake port of the second-stage cylinder. The compressed gas in the gas storage chamber 2... The refrigerant gas can then directly enter the secondary cylinder of the compressor for further compression. At this point, the refrigerant gas discharge and intake process is completed in the upper cylinder head body 1. The upper cylinder head body 1 greatly saves the internal space of the compressor and simplifies the intake and exhaust process of the upper cylinder head body 1. Since its gas storage chamber 2 is on the cylinder head itself, the refrigerant gas does not need to pass through other components, and the sealing performance is more reliable. The middle part of the gas storage chamber 2 is equipped with the primary cylinder exhaust port 3, and the inner edge of the gas storage chamber 2 is provided with the secondary cylinder intake port 4.

[0023] like Figure 2 As shown, the surfaces of the first-stage cylinder exhaust port 3 and the second-stage cylinder intake port 4 are both fitted with annular sealing rings 5. The annular sealing rings 5 ​​are made of fluororubber. The fluororubber sealing rings can effectively seal the tiny gaps between the first-stage exhaust chamber and the external interface, preventing the leakage of high-pressure CO2 refrigerant gas, which is the basis for ensuring the normal working pressure of the compressor.

[0024] like Figure 3 As shown, a connecting block 10 is fixedly connected to the inner top of the first-stage cylinder exhaust port 3 and the second-stage cylinder intake port 4. The connecting block 10 has a placement hole inside, and an anti-backflow mechanism 6 is installed inside the placement hole. The anti-backflow mechanism 6 helps to prevent gas backflow.

[0025] like Figure 3 As shown, the anti-backflow mechanism 6 includes a fixed cylinder 601 installed inside the placement hole. A torsion spring 602 is fixedly connected to one side of the fixed cylinder 601. A rotating column 603 is fixedly connected to one side of the torsion spring 602. A baffle 604 is fixedly connected to one side of the rotating column 603. The baffle 604 adopts a structure of circular baffle plate in conjunction with the torsion spring 602. It opens under positive gas pressure and closes by the force of the torsion spring 602 when the pressure disappears or reverses.

[0026] like Figure 3 As shown, the rotating column 603 is rotatably connected to the inside of the fixed cylinder 601. The upper surface of the baffle 604 has two mounting holes that are compatible with the rotating column 603. The mounting holes facilitate the support and fixation of the rotating column 603. The rotating column 603 rotates inside the fixed cylinder 601 on one side and drives the torsion spring 602 installed inside to undergo elastic deformation.

[0027] like Figure 2As shown, a locking block 7 is fixedly connected to the bottom of one of the baffles 604. The locking block 7 is adapted to the locking groove opened on the surface of the exhaust port 3 of the first stage cylinder. The locking groove facilitates the limiting of the locking block 7, thereby preventing the baffle 604 from rotating in the opposite direction.

[0028] like Figure 4 As shown, a positioning plate 8 is threadedly connected to the lower surface of the secondary cylinder intake port 4, and a threaded post 9 is threadedly connected to the surface of the positioning plate 8. One side of the positioning plate 8 overlaps with one side of the baffle 604. The positioning plate 8 facilitates the limiting of the baffle 604, allowing gas to enter only from one direction and blocking the normal flow of reverse airflow.

[0029] The working principle of this utility model is as follows: When in use, a gas storage chamber 2 is opened on the upper cylinder head body 1 to store the compressed gas discharged from the first-stage cylinder. Then, a second-stage cylinder intake port 4 is directly opened in the gas storage chamber 2. The second-stage cylinder intake port 4 is connected to the intake hole of the second-stage cylinder. The compressed refrigerant gas in the gas storage chamber 2 can then directly enter the second-stage cylinder of the compressor for further compression. At this time, the discharge and intake process of refrigerant gas in the upper cylinder head body 1 is completed.

[0030] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A CO2 automotive air conditioning compressor intake and exhaust integrated upper cylinder head, comprising an upper cylinder head body (1), characterized in that: An air storage chamber (2) is provided on one side of the upper cylinder head body (1). A first-stage cylinder exhaust port (3) is installed in the middle of the air storage chamber (2). A second-stage cylinder intake port (4) is provided on the edge of one side of the interior of the air storage chamber (2).

2. The integrated intake and exhaust cylinder head of a CO2 automotive air conditioning compressor according to claim 1, characterized in that, The surfaces of the exhaust port (3) of the first-stage cylinder and the intake port (4) of the second-stage cylinder are fitted with annular sealing rings (5), and the material of the annular sealing rings (5) is fluororubber.

3. The integrated upper cylinder head for intake and exhaust of a CO2 automotive air conditioning compressor according to claim 1, characterized in that, A connecting block (10) is fixedly connected to the inner top of the first-stage cylinder exhaust port (3) and the second-stage cylinder intake port (4). The connecting block (10) has a placement hole inside, and an anti-backflow mechanism (6) is installed inside the placement hole.

4. The integrated upper cylinder head for intake and exhaust of a CO2 automotive air conditioning compressor according to claim 3, characterized in that, The anti-backflow mechanism (6) includes a fixed cylinder (601) installed inside the placement hole. A torsion spring (602) is fixedly connected to one side of the fixed cylinder (601), a rotating column (603) is fixedly connected to one side of the torsion spring (602), and a baffle (604) is fixedly connected to one side of the rotating column (603).

5. The integrated upper cylinder head for intake and exhaust of a CO2 automotive air conditioning compressor according to claim 4, characterized in that, The rotating column (603) is rotatably connected to the inside of the fixed cylinder (601), and the upper surface of the baffle (604) has two mounting holes that are adapted to the rotating column (603).

6. The integrated upper cylinder head for intake and exhaust of a CO2 automotive air conditioning compressor according to claim 4, characterized in that, One of the baffles (604) has a fixed connection to a locking block (7) at its bottom, which is adapted to a slot on the surface of the exhaust port (3) of the first-stage cylinder.

7. The integrated upper cylinder head for intake and exhaust of a CO2 automotive air conditioning compressor according to claim 1, characterized in that, The lower surface of the secondary cylinder intake port (4) is threaded with a positioning plate (8), and the surface of the positioning plate (8) is threaded with a threaded post (9). One side of the positioning plate (8) overlaps with one side of the baffle (604).

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