Novel cylinder cover for compressor

Abstract

A novel air cylinder cover for a compressor comprises a cover body, the cover body is provided with a main cavity, an air inlet and an exhaust cavity, the main cavity and the air inlet are completely separated, the exhaust cavity is completely separated from the main cavity, the novel air cylinder cover further comprises a cover pad and a valve plate which are sequentially connected with the cover body in a matched mode, a pressure relief valve flap is arranged on the face, matched with the cover pad, of the valve plate, and a limiting plate is arranged in the main cavity. The position of the limiting plate corresponds to the position of the pressure relief valve flap, and the pressure relief valve flap is limited by the limiting plate; according to the limiting block, the contact area of the cover body and the cover gasket is increased, the pressure relief valve flap is limited and protected, the stress of the cover gasket is relatively uniform, the stress of the valve flap is relatively uniform, and the valve flap is not prone to being damaged due to the fact that the stress on one side is large.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and particularly relates to a cylinder head for a new type of compressor. Background Art

[0002] A compressor is a mechanical device that raises low-pressure gas to high-pressure gas. It increases the pressure of the gas by reducing its volume. Compressors are widely used in various industrial and commercial fields, including refrigeration, air conditioning, gas transportation, oil and gas processing, etc. The cylinder head of a compressor is an important component in the compressor. It functions in sealing, supporting, cooling, providing installation interfaces, exhausting, and intake. The design and material selection of the cylinder head have an important impact on the performance and lifespan of the compressor. Currently, the steel sheet valve group between the compressor cylinder head and the compressor cylinder mainly includes a cylinder head gasket, a suction valve plate, and a cylinder gasket. During the suction process of the compressor, uneven airflow passes through the suction valve plate and flows into the cylinder. Due to the unevenness of the airflow, when the pressure on one side of the cylinder is greater than the pressure on the cylinder head side, it will push the cylinder head gasket and the cylinder gasket in the reverse direction, causing the cylinder head gasket and the cylinder gasket to be subjected to the reverse force. Being subjected to the impact force on one side for a long time easily shortens their service life.

[0003] For example, a utility model with a publication number of CN215949770U in a Chinese patent discloses a compressor steel valve plate assembly, belonging to the valve plate structure of a compressor. It includes a body and a cylinder head. A first valve plate, a valve plate, and a second valve plate are sequentially installed between the body and the cylinder head. An intake valve tongue is provided on the first valve plate, a pressure relief valve tongue is provided on the second valve plate, a pressure relief valve tongue hole is provided on the first valve plate and the valve plate opposite to the pressure relief valve tongue, a pressure relief seat is provided in the cylinder head opposite to the pressure relief valve tongue, and a pressure relief cavity is provided outside the pressure relief seat. When the pressure on the cylinder side is greater than the pressure on the cylinder head side in the steel valve plate assembly disclosed in the above application, it will cause the cylinder head gasket and the valve tongue to be subjected to unidirectional force, and the cylinder head gasket and the valve tongue are prone to damage after long-term use, shortening the service life. Summary of the Utility Model

[0004] Aiming at the problems in the prior art that there is uneven force between the cylinder head side and the cylinder side, and components such as the gasket and the valve tongue are prone to damage after long-term use, affecting the sealing performance of the cylinder head, the utility model proposes a cylinder head for a new type of compressor, which can better balance the pressure on the gasket on the cylinder head side and the cylinder side, reduce the damage to components such as the gasket and the valve tongue caused by unidirectional force, extend the service life of components such as the gasket and the valve plate, and reduce the replacement frequency.

[0005] To achieve the above technical effects, the utility model proposes:

[0006] A cylinder head for a new type of compressor, comprising a cover body. The cover body has a main cavity and an air inlet that are completely separated, and an exhaust cavity that is completely separated from the main cavity. It also includes a gasket and a valve plate that are sequentially and cooperatively connected to the cover body. A pressure relief valve tongue is provided on the surface of the valve plate that cooperates with the gasket. A limiting plate is provided in the main cavity, and the position of the limiting plate corresponds to the position of the pressure relief valve tongue, and the limiting plate limits the pressure relief valve tongue. The cover body, the gasket, and the valve plate are sequentially and cooperatively connected. A pressure relief valve tongue is fixedly connected to the side surface where the valve plate cooperates with the gasket. One end of the pressure relief valve tongue is fixed on the valve plate, and the other end can move between the cover body and the valve plate. The gasket abuts against the fixed end of the pressure relief valve tongue. The position of the limiting plate in the main cavity corresponds to the position of the pressure relief valve tongue. The pressure relief valve tongue is limited by the setting of the limiting plate, and the deformation position of the pressure relief valve tongue is limited. When the compressor relieves pressure, the high-pressure gas pushes the pressure relief valve tongue, and one end of the pressure relief valve tongue deforms, generating a gap with the pressure relief port between the valve plate. The high-pressure gas enters the main cavity of the cover body through this gap and then flows through the exhaust cavity and is discharged. The setting of the limiting plate can limit the maximum deformation value of the pressure relief valve tongue, protecting the pressure relief valve piece. At the same time, the limiting plate can increase the contact area between the cover body and the gasket, making the force-bearing area of the gasket more uniform.

[0007] Preferably, the limiting plate includes a first limiting plate and a second limiting plate. The top surface of the first limiting plate is flush with the mating surface of the cover body. The top surface of the second limiting plate is inclined along the deformation direction of the pressure relief valve tongue. The highest point of the top surface of the second limiting plate is flush with the mating surface of the cover body. The first limiting plate limits the tail of the pressure relief valve tongue, and the shape of the top surface of the first limiting plate corresponds to the tail of the pressure relief valve tongue. The second limiting plate limits the top of the pressure relief valve tongue, and the shape of the top surface of the second limiting plate corresponds to the shape of the top of the pressure relief valve tongue. The height of the top surface of the first limiting plate is flush with the mating surface of the cover body. The top surface of the first limiting plate faces the fixed end of the pressure relief valve tongue, increasing the contact area between the cylinder head and the gasket at the same time. And the shape of the top surface of the first limiting plate corresponds to the shape of the tail of the pressure relief valve tongue, playing a role in fixing and limiting the pressure relief valve tongue. The second limiting plate is inclined along the deformation direction of the pressure relief valve tongue for better limiting of the pressure relief valve tongue. The highest point of the top surface of the second limiting plate is at the same height as the mating surface of the cover body. The shape of the top surface of the second limiting plate corresponds to the shape of the top of the pressure relief valve plate, and the maximum deformation value of the pressure relief valve tongue can be changed through different height designs. The top of the pressure relief valve tongue fits the pressure relief port of the valve plate. When the compressor relieves pressure, the high-pressure gas impacts the movable end of the pressure relief valve tongue, causing it to deform.

[0008] Preferably, the exhaust cavity is completely separated from the main cavity by a partition plate, and an exhaust hole is provided in the exhaust cavity. The partition plate completely separates the exhaust cavity and the main cavity, and an exhaust hole for exhausting gas is provided in the exhaust cavity.

[0009] Further, an exhaust connection cavity is provided on the connection surface between the main cavity and the partition plate. The exhaust connection cavity protrudes towards the exhaust cavity and its width is smaller than the length of the partition plate. Guide ribs are provided on the inner wall of the exhaust connection cavity, and the height of the guide ribs is smaller than the depth of the exhaust connection cavity. The horizontal position of the exhaust connection cavity corresponds to the connection port between the cylinder head and the exhaust buffer cavity of the compressor body after assembly. High-pressure gas enters the exhaust buffer cavity of the compressor body from the main cavity through the exhaust connection cavity, and the guide ribs have the function of guiding the air flow.

[0010] Optionally, the exhaust cavity includes a first exhaust cavity, a second exhaust cavity, and a third exhaust cavity that are connected to each other with gradually increasing depths, and the exhaust hole is provided on the bottom surface of the first exhaust cavity. The exhaust cavity includes a first exhaust cavity, a second exhaust cavity, and a third exhaust cavity with gradually increasing depths, which are used for further buffering of the discharged gas.

[0011] Optionally, an installation hole is provided on the cover body outside the main cavity, and a rib protruding towards the main cavity is provided at the junction of the main cavity and the installation hole. The depth of the rib is smaller than the depth of the bottom surface of the main cavity. The rib can strengthen the strength of the installation hole.

[0012] Optionally, the air inlet is of a U-shaped groove structure, and limit grooves are provided on the side walls of both sides of the U-shaped groove. The air inlet is used to connect the intake muffler of the compressor, and the limit grooves are used to limit the intake muffler.

[0013] Further, a buffer groove is provided between the air inlet and the installation hole close to the air inlet. The buffer groove provides a certain buffering effect when high-pressure gas enters the main cavity.

[0014] The beneficial effects of the present utility model are as follows:

[0015] A new type of cylinder head for a compressor proposed by the present utility model increases the force-bearing area between the cylinder head and the gasket, and better balances the pressures on the gasket on the cylinder head side and the cylinder side. The limiting plate plays a role in limiting and protecting the valve tongue, making the force on the valve tongue relatively uniform, reducing the damage to components such as the gasket and the valve tongue caused by unilateral force, extending the service life of components such as the gasket and the valve plate, and reducing the replacement frequency. Description of the Drawings

[0016] Figure 1 It is an overall schematic diagram of the cover body of a new type of cylinder head for a compressor.

[0017] Figure 2 It is a top view of the cover body of a new type of cylinder head for a compressor.

[0018] Figure 3 It is a first schematic diagram of the positional relationship of component assembly of a new type of cylinder head for a compressor.

[0019] Figure 4It is the second schematic diagram of the component assembly position relationship of the cylinder head for a new type of compressor. Brief Description of the Drawings:

[0021] 1. Main cavity; 2. Limit plate; 3. Exhaust cavity; 4. Intake port; 5. Mounting hole; 6. Relief valve tongue; 7. Valve plate; 8. Gasket; 9. Cover body; 11. Partition; 12. Exhaust connection cavity; 13. Buffer groove; 21. First limit plate; 22. Second limit plate; 31. First exhaust cavity; 32. Second exhaust cavity; 33. Third exhaust cavity; 34. Exhaust hole; 41. Limit groove; 51. Rib; 61. Tail of relief valve tongue; 62. Top of relief valve tongue; 121. Guide rib. Detailed Implementation Modes

[0022] The following specific embodiments illustrate the implementation modes of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0023] The present invention provides a cylinder head for a new type of compressor, and the following describes the preferred embodiments of the cylinder head for a new type of compressor.

[0024] Embodiment 1

[0025] As Figure 1 and Figure 4 shown, the cylinder head for the new type of compressor in Embodiment 1 includes a cover body 9, a gasket 8 and a valve plate 7. The three components are sequentially and cooperatively connected. The relief valve tongue 6 is arranged on the mating surface of the valve plate 7 and the gasket 8. The gasket 8 abuts against the tail 61 of the relief valve tongue. The cover body 9 includes a main cavity 1 and an intake port 4. The main cavity 1 and the intake port 4 are completely separated. The cylinder head further includes an exhaust cavity 3, and the exhaust cavity 3 is completely separated from the main cavity 1 by a partition 11. Two limit plates 2 are also provided in the main cavity 1. The positions of the two limit plates 2 correspond to the position of the relief valve tongue 6. The two limit plates 2 limit the relief valve tongue 6 to achieve the protection effect on the relief valve tongue 6. At the same time, the limit plates can also increase the contact area between the cover body 9 and the gasket 8, making the force area between the cover body 9 and the gasket 8 more uniform.

[0026] As Figure 2 shown, the two limit plates 2 include a first limit plate 21 and a second limit plate 22. The top surface of the first limit plate 21 is flush with the mating surface of the cover body. Its top surface corresponds to the shape of the tail 61 of the relief valve tongue (as Figure 4 shown), being a rectangle with rounded corners, which is beneficial to the flow of gas on its surface. The first limit plate 21 limits the tail 61 of the relief valve tongue, provides certain support, and at the same time increases the force area with the gasket 8; the top surface shape of the second limit plate 22 corresponds to the shape of the top 62 of the relief valve tongue (as Figure 4As shown in the figure, one end of the top surface is circular and the other end is rectangular, with a smooth transition between the two ends, which is conducive to the flow of gas on its side. The top surface of the second limiting plate 22 is slightly inclined along the deformation direction of the pressure relief valve tongue 6, which is used to cooperate with the pressure relief valve tongue 6 during deformation. When the pressure relief valve tongue 6 is impacted by high-pressure gas, its top deforms towards the top of the second limiting plate 22 and fits with the top of the second limiting plate 22, thereby playing a limiting role. The highest point of the top surface of the second limiting plate 22 is flush with the mating surface of the cover body. In this embodiment, the first limiting plate 21 and the second limiting plate 22 are perpendicular to each other and separated from each other, and both have a certain gap with the inner wall of the main cavity 1. When high-pressure gas enters the main cavity 1, it passes through the gaps between the first limiting plate 21 and the second limiting plate 22, between the first limiting plate 21 and the inner wall of the main cavity 1, and between the second limiting plate 22 and the inner wall of the main cavity 1, playing a multiple buffering role and gradually reducing the pressure of the high-pressure gas.

[0027] The partition plate 11 completely separates the exhaust cavity 3 from the main cavity 1. The exhaust cavity 3 includes a first exhaust cavity 31, a second exhaust cavity 32, and a third exhaust cavity 33 with gradually increasing depths and being interconnected. An exhaust hole is provided on the bottom surface of the first exhaust cavity 31; the second exhaust cavity 32 and the third exhaust cavity 33 are located on one side of the first exhaust cavity 31. The bottom surface area of the first exhaust cavity 31 is the largest, followed by the bottom surface of the third exhaust cavity 33, and the bottom surface area of the second exhaust cavity 32 is the smallest; the exhaust cavity 3 has a buffering and sound-absorbing effect on high-pressure gas. After the high-pressure gas enters the exhaust cavity 3 from the exhaust buffer cavity of the compressor body, the gas flows through the first exhaust cavity 31, the second exhaust cavity 32, and the third exhaust cavity 33, and after multiple buffering, the pressure of the high-pressure gas is gradually reduced.

[0028] Three mounting holes 5 are provided on the cover body outside the main cavity 1, and a rib 51 protruding towards the main cavity 1 is provided at the connection between the main cavity 1 and the mounting holes 5. The top surface and the side surface of the rib 51 are smoothly transitioned. The first limiting plate 21 is connected to the rib 51 of a mounting hole 5 close to it; the depth of the rib 51 is less than the depth of the bottom surface of the main cavity 1. The rib 51 strengthens the mounting holes 5, and its depth cannot be the same as the depth of the bottom surface of the main cavity 1. If they are the same, the rib 51 will become the connection part between the main cavity 1 and the mounting holes 5, and the volume of the main cavity 1 will be further reduced.

[0029] The air inlet 4 is connected to the intake silencer pipe of the compressor and is used to introduce the gas outside the compressor into the compressor cylinder. Its overall shape is U-shaped, and a limiting groove 41 is provided on each side of the U-shaped part. The limiting groove 41 plays a limiting role on the intake silencer pipe, and the two limiting grooves 41 are arranged opposite to each other.

[0030] Such as Figure 3As shown in the figure, an exhaust connection cavity 12 is provided on the connection surface between the main cavity 1 and the partition plate 11. Its horizontal position corresponds to the connection port between the cylinder head and the exhaust buffer cavity of the compressor body after assembly. High-pressure gas enters the exhaust buffer cavity of the compressor body from the main cavity 1 through the exhaust connection cavity 12. Its width is smaller than the length of the partition plate 11. An overly large opening width is not conducive to gas discharge, and the specific width is modified according to the corresponding connection port. The opening direction of the exhaust connection cavity 12 faces the main cavity 1, and guide ribs 121 are provided along the inner wall of the exhaust connection cavity 12. The surface of the guide ribs 121 is smooth, which is conducive to gas flowing on its surface. The guide ribs 121 guide the high-pressure gas into the exhaust buffer cavity of the compressor.

[0031] A buffer groove 13 is provided between the air inlet 4 and the mounting hole 5 close to the air inlet 4. The buffer groove 13 separates the connection surface between this mounting hole 5 and the air inlet 4. It is strip-shaped and has a certain accommodation space. The high-pressure gas accommodated makes the pressure between the cover body 9 and the gasket 8 more uniform.

[0032] As Figure 4 shown, the pressure relief valve tongue 6 is sheet-shaped, its top is circular, and its tail is rectangular with a small opening on one side of the long side, which is convenient for fixed installation with the valve plate 7. The top and the tail are connected by a rectangle and have a smooth transition. The tail 61 of the pressure relief valve tongue is welded in the installation groove of the valve plate 7, and the circular top corresponds to the pressure relief hole on the valve plate 7. The piston in the compressor body compresses the gas, and the high-pressure gas impacts the top of the pressure relief valve plate. The top of the pressure relief valve plate deforms in the direction of the high-pressure gas impact and abuts against the top surface of the second limiting plate, and the high-pressure gas is discharged.

[0033] Next, the gas flow in the cylinder head of the new compressor in this embodiment during normal operation of the compressor will be described:

[0034] The piston in the compressor cylinder makes a reciprocating motion. When the piston performs the intake stroke, a negative pressure is formed inside the cylinder, and the external gas enters the cylinder through the intake silencer tube installed on the intake port 4 of the cover 9. When the piston performs the compression stroke, the gas inside the cylinder is compressed to the bottom of the cylinder, and a positive pressure is formed inside the cylinder. The high-pressure gas impacts the top of the pressure relief valve plate 7 through the pressure relief hole at the bottom of the cylinder. The pressure relief valve tongue 6 deforms along the impact direction of the high-pressure gas, and a gap is formed between the valve plate 7. The high-pressure gas leaks out from the gap. The top 62 of the pressure relief valve tongue abuts against the top surface of the second limiting plate 22, and the second limiting plate 22 realizes the limiting and protection functions for the pressure relief valve tongue 6. The top surface of the first limiting plate 21 is flush with the assembly surface of the cover 9, corresponding to the tail 61 of the pressure relief valve tongue during assembly, and plays a certain supporting and fixing role for its tail during the deformation process of the pressure relief valve tongue 6. At the same time, the first limiting plate 21 increases the contact area between the cover 9 and the cover gasket 8, making the force between the cover 9 and the cover gasket 8 more uniform. After the high-pressure gas enters the main cavity 1, a part of it flows through the gap between the side surface of the second limiting plate 22 and the inside of the main cavity 1 and enters the area between the first limiting plate 21 and the second limiting plate 22, and then enters the area in the main cavity 1 between the first limiting plate 21 and the buffer groove 13 through the gap between the side surface of the first limiting plate 21 and the inner wall of the main cavity 1, and then flows through the buffer groove 13 to achieve multi-stage buffering. Another part of the high-pressure gas directly enters the part of the main cavity 1 between the second limiting plate 22 and the exhaust connection cavity 12, and then enters the exhaust connection cavity 12, flows through the guide rib 121 of the exhaust connection cavity 12 into the exhaust buffer cavity of the compressor body, and enters the exhaust cavity 3 after being buffered and silenced by the exhaust buffer cavity. At this time, the high-pressure gas loses most of its kinetic energy after triple buffering in the first exhaust cavity 31, the second exhaust cavity 32, and the third exhaust cavity 33, and is discharged through the exhaust hole 34.

[0035] In the cylinder head for the new compressor in this embodiment, two limiting plates are provided in the main cavity: the first limiting plate 21 provides support for the tail 61 of the pressure relief valve tongue and increases the contact area between the cover 9 and the cover gasket 8; the second limiting plate provides support for the top of the pressure relief valve tongue during cylinder pressure relief and limits the position where the pressure relief valve tongue 6 deforms the most. Through the setting of the limiting plate 2, it can balance to a certain extent the pressures exerted on the cover gasket 8 and the pressure relief valve tongue 6 from the cover 9 and both sides of the cylinder during the intake and pressure relief processes of the cylinder, reduce the unilateral force received by the cover gasket 8 and the pressure relief valve tongue 6, alleviate the damage to the cover gasket 8 and the pressure relief valve tongue 6 caused by unilateral force, and extend the service life of the cover gasket 8 and the pressure relief valve tongue 6. The setting of the limiting plate 2 gradually reduces the impact force of the high-pressure gas entering the main cavity and flowing through the side surface of the limiting plate, which can reduce the vibration generated during the pressure relief process to a certain extent. At the same time, in cooperation with the multi-stage buffering setting of the exhaust cavity, the pressure of the main cavity on the cover gasket 8 becomes more uniform.

[0036] Embodiment 2

[0037] The cylinder head for the new compressor in Embodiment 2 includes a cover body 9, a gasket 8, and a valve plate 7, which are connected in sequence. A pressure relief valve tongue 6 is fixedly connected to the surface of the valve plate 7 that mates with the gasket 8, and the gasket 8 abuts against the tail 61 of the pressure relief valve tongue. The cover body 9 includes a main cavity 1, an air inlet 4 that is completely separated from the main cavity 1, and an exhaust cavity 12 that is completely separated from the main cavity 1. It also includes two limiting plates 2 disposed in the main cavity: a first limiting plate 21 and a second limiting plate 22. The top surface of the first limiting plate 21 corresponds to the tail 61 of the pressure relief valve tongue and provides certain support for it. The second limiting plate 22 corresponds to the top 62 of the pressure relief valve tongue and limits the position after its deformation. Different from Embodiment 1, Embodiment 2 does not include the buffer groove 13 and the multi-stage stratification of the exhaust cavity 3, that is, it does not include the second exhaust cavity 32 and the third exhaust cavity 33, and the exhaust hole 34 is provided on the bottom surface of the first exhaust cavity 31. Compared with the cylinder head structure of Embodiment 1, the cylinder head of Embodiment 2 is simpler in structure and relatively lower in manufacturing cost while ensuring the protection of the gasket 8 and the pressure relief valve tongue 6.

[0038] The first limiting plate 21 provides support for the tail 61 of the pressure relief valve tongue and increases the contact area between the cover body 9 and the gasket 8. The second limiting plate 22 limits the deformation position of the top 62 of the pressure relief valve tongue during cylinder pressure relief and provides certain protection for it. The first limiting plate 21 and the second limiting plate 22 are perpendicular to each other and separated from each other, and both have a certain gap with the inner wall of the main cavity 1. When high-pressure gas fills the main cavity 1, it passes through the gaps between the first limiting plate 21 and the second limiting plate 22, between the first limiting plate 21 and the inner wall of the main cavity 1, and between the second limiting plate 22 and the inner wall of the main cavity 1, playing a multiple buffering role and gradually reducing the pressure of the high-pressure gas.

[0039] Same as Embodiment 1, the cover body 9 is provided with three mounting holes 5. A rib 51 for strengthening the mounting hole is provided on the side of the mounting hole 5 that contacts the main cavity 1, and the depth of the rib 51 is less than the depth of the bottom surface of the main cavity 1. An exhaust connection cavity 12 is provided on the side of the partition 11 that contacts the main cavity 1. Its position is close to the edge of the cover body 9 and faces the main cavity. A guiding rib 121 with a smooth surface is provided inside it. The two work together to guide the high-pressure gas into the exhaust buffer cavity of the compressor body. The overall shape of the air inlet 4 is U-shaped, and a limiting groove 41 is provided on each side of the U-shape. The two limiting grooves 41 are arranged opposite to each other.

[0040] In this embodiment, the gas flow path during cylinder pressure relief is slightly different from that in Embodiment 1, that is, the high-pressure gas does not reach the buffer groove 13 after flowing through the outer side surfaces of the first limiting plate 21 and the second limiting plate 22; the gas discharged through the exhaust cavity 12 enters the exhaust cavity 3 directly after passing through the exhaust buffer cavity of the compressor body.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cylinder head for a new type of compressor, comprising a cover body. The cover body has a main cavity and an air inlet that are completely separated, an exhaust cavity that is completely separated from the main cavity, and further includes a gasket and a valve plate that are sequentially and cooperatively connected to the cover body. It is characterized in that, A pressure relief valve tongue is provided on the surface of the valve plate that mates with the cover gasket. A limit plate is provided in the main cavity, and the position of the limit plate corresponds to the position of the pressure relief valve tongue. The limit plate limits the pressure relief valve tongue.

2. The cylinder head for a novel compressor according to claim 1, wherein The limit plate includes a first limit plate and a second limit plate. The top surface of the first limit plate is flush with the mating surface of the cover body. The top surface of the second limit plate is inclined along the deformation direction of the pressure relief valve tongue, and the highest point of the top surface of the second limit plate is flush with the mating surface of the cover body. The first limit plate limits the tail of the pressure relief valve tongue, and the shape of the top surface of the first limit plate corresponds to the tail of the pressure relief valve tongue. The second limit plate limits the top of the pressure relief valve tongue, and the shape of the top surface of the second limit plate corresponds to the shape of the top of the pressure relief valve tongue.

3. A cylinder head for a new type of compressor according to claim 1, characterized in that, The exhaust cavity is completely separated from the main cavity by a partition, and an exhaust hole is provided in the exhaust cavity.

4. A cylinder head for a new type of compressor according to claim 2, characterized in that, An exhaust connection cavity is provided on the connection surface between the main cavity and the partition. The exhaust connection cavity protrudes towards the exhaust cavity and its width is smaller than the length of the partition. Guide ribs are provided on the inner wall of the exhaust connection cavity, and the height of the guide ribs is smaller than the depth of the exhaust connection cavity.

5. A cylinder head for a new type of compressor according to claim 3, characterized in that, The exhaust cavity includes a first exhaust cavity, a second exhaust cavity, and a third exhaust cavity that are connected to each other with increasing depths in sequence, and the exhaust hole is provided on the bottom surface of the first exhaust cavity.

6. A cylinder head for a novel compressor according to any one of claims 1 to 4, characterized in that, An installation hole is provided on the cover body outside the main cavity. A rib protruding towards the main cavity is provided at the connection between the main cavity and the installation hole, and the depth of the rib is smaller than the depth of the bottom surface of the main cavity.

7. A cylinder head for a novel compressor according to any one of claims 1 to 4, characterized in that, The air inlet is of a U-shaped groove structure, and limit grooves are provided on the side walls of both sides of the U-shaped groove.

8. A cylinder head for a new type of compressor according to claim 6, characterized in that, A buffer groove is provided between the air inlet and the installation hole close to the air inlet.

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