Cylinder cover structure, pump body assembly and compressor

Abstract

The invention provides a cylinder cover structure, a pump body assembly and a compressor, and belongs to the technical field of compressors. The air cylinder cover is divided into the first cover body and the second cover body, the sound insulation material is used in the air suction cavity of the first cover body, heat absorption of the air suction cavity is reduced, air suction of the compressor is prevented from being overheated, and the air suction efficiency is improved. The exhaust cavity of the second cover body is made of metal materials, and the surface of the exhaust cavity is coated with the heat insulation coating, so that on one hand, the exhaust cavity formed by the metal materials can effectively cope with high-temperature and high-pressure refrigerants, and the problem of thermal damage such as thermal deformation of the exhaust cavity caused by the high-temperature and high-pressure refrigerants flowing through the exhaust cavity is solved; on the other hand, the surface of the exhaust cavity of the metal structure is coated with the heat insulation layer, outward diffusion of high temperature in the air cylinder cover can be reduced, when the air cylinder cover structure is arranged in the compressor shell, the temperature in the shell between the compressor shell and the air cylinder cover structure can be reduced, high-temperature gasification of lubricating oil is reduced, and the service life of the compressor is prolonged. Bearing lubrication power consumption caused by high temperature is reduced, and efficiency and reliability are improved.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more specifically, to a cylinder head structure, a pump body assembly, and a compressor. Background Technology

[0002] In compressors, temperature transfer along the intake and exhaust paths significantly impacts compressor performance. Excessive temperature in the intake path leads to compressor overheating, affecting intake efficiency. Conversely, excessive temperature diffusion in the exhaust path results in high internal compressor temperatures, causing both intake overheating and increased temperatures in moving parts. This leads to increased lubricant vaporization and high bearing lubrication consumption, negatively impacting both compressor performance and reliability. Summary of the Invention

[0003] This application provides a cylinder head structure, a pump body assembly, and a compressor. Compared to conventional cylinder head structures, this application features a split cylinder head structure, dividing the cylinder head into a first cover and a second cover. Sound-insulating material is used in the intake chamber of the first cover to reduce heat absorption, prevent overheating of the compressor intake, and improve intake efficiency. The exhaust chamber of the second cover uses a metal material coated with a heat-insulating coating. On one hand, the metal exhaust chamber effectively handles high-temperature, high-pressure refrigerants, preventing thermal damage such as thermal deformation of the exhaust chamber. On the other hand, coating the metal exhaust chamber surface with a heat-insulating layer reduces the outward diffusion of high temperatures from the cylinder head. When the cylinder head structure is located within the compressor housing, it helps reduce the internal temperature between the compressor housing and the cylinder head structure, thereby reducing high-temperature vaporization of lubricating oil, reducing bearing lubrication power consumption caused by high temperatures, improving efficiency and reliability, and simultaneously reducing exhaust energy loss and improving exhaust efficiency. Specifically: The first aspect of this application provides a cylinder head structure for installation in a compressor and forming an intake chamber and an exhaust chamber for refrigerant flow in the compressor. The cylinder head structure includes: The first cover and the second cover are provided. The first cover has a separate intake chamber and an installation chamber. The second cover is embedded in the installation chamber of the first cover and has an exhaust chamber. The intake chamber is used for the flow of low-temperature and low-pressure refrigerant when the cylinder head structure is installed in the compressor. The exhaust chamber is used for the discharge of high-temperature and high-pressure refrigerant when the cylinder head structure is installed in the compressor. The suction chamber for the inflow of low-temperature, low-pressure refrigerant is made of heat-insulating material, while the exhaust chamber for the discharge of high-temperature, high-pressure refrigerant is made of metal and its surface is coated with a heat-insulating coating.

[0004] In the above technical solution, a partition wall connects the air intake chamber and the mounting chamber of the first cover, and the exhaust chamber of the second cover has an outer wall. The outer wall of the second cover, which is embedded in the mounting cavity, is at least partially attached to the partition wall of the first cover.

[0005] In the above technical solution, the mounting cavity contour of the first cover is adapted to the outer contour of the second cover; The outer contour of the second cover, which is embedded in the mounting cavity, fits together with the contour of the mounting cavity.

[0006] In the above technical solution, the first cover with the air intake cavity is made of composite material and insulating material; The second cover, which forms an exhaust cavity, is made of metal and its surface is coated with a heat-insulating coating.

[0007] In the above technical solution, the suction chamber of the first cover has suction chamber openings on both sides in the direction of refrigerant flow of the compressor, and the mounting chamber of the first cover has a mounting chamber opening on one side in the direction of refrigerant flow of the compressor and a closed end on the other side. The exhaust chamber of the second cover has an exhaust chamber opening on one side in the direction of refrigerant flow in the compressor, and a closed end on the other side; The second cover is embedded in the mounting cavity through the mounting cavity opening of the first cover, and the direction of the exhaust cavity opening of the second cover is the same as the direction of the opening of the mounting cavity.

[0008] In the above technical solution, the mounting cavity opening of the first cover and the exhaust cavity opening of the second cover define the valve plate mounting space in the refrigerant flow direction of the compressor. The cylinder head structure also includes: Valve plate assembly and cylinder seat, the valve plate assembly is embedded in the valve plate mounting space and mates with the cylinder seat in the valve plate mounting space; The outer periphery of the mating area between the valve plate assembly and the cylinder seat fits into the mounting cavity opening of the first cover, thereby sealing the mating area between the valve plate assembly and the cylinder seat through the first cover.

[0009] In the above technical solution, a sealed chamber extending along the refrigerant flow direction of the compressor is defined between the closed end of the exhaust chamber and the closed end of the mounting chamber.

[0010] In the above technical solution, the sealed cavity is filled with sound-insulating components; The sound insulation components are composed of multiple layers of materials with different acoustic impedances.

[0011] In the above technical solution, the air intake cavity of the first cover is provided with a snap ring mounting position, which is designed to be hollow and form a snap ring mounting support point; The cylinder head structure also includes: A retaining ring is installed at the retaining ring mounting position and supported on the retaining ring mounting support point; The intake silencer is mounted on the first cover via a snap ring.

[0012] The second aspect of this application provides a pump body assembly, which is installed in a compressor for compressing the refrigerant in the compressor. The pump body assembly includes the cylinder head structure provided in the first aspect of this application.

[0013] The third aspect of this application provides a compressor, which includes a housing and a pump assembly disposed in the housing, the pump assembly being the pump assembly provided in the second aspect of this application.

[0014] In the above technical solution, the compressor is a piston compressor.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: In this embodiment, the cylinder head structure is configured as a split type, consisting of a first cover and a second cover. Sound-insulating material is used in the intake chamber of the first cover to reduce heat absorption, prevent overheating of the compressor intake, and improve intake efficiency. The exhaust chamber of the second cover uses metal material coated with a heat-insulating coating. On one hand, the metal exhaust chamber effectively handles high-temperature, high-pressure refrigerant, preventing thermal damage such as thermal deformation of the exhaust chamber. On the other hand, coating the metal exhaust chamber surface with a heat-insulating layer reduces the outward diffusion of high temperatures from the cylinder head. When the cylinder head structure is located inside the compressor housing, it helps reduce the internal temperature between the compressor housing and the cylinder head structure, thereby reducing high-temperature vaporization of lubricating oil, reducing bearing lubrication power consumption caused by high temperatures, improving efficiency and reliability, and simultaneously reducing exhaust energy loss and improving exhaust efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the first cover in an embodiment of this application; Figure 2 This is a three-dimensional structural diagram of the second cover in an embodiment of this application; Figure 3 This is a side view of the assembled first cover and second cover in an embodiment of this application. Figure 4 for Figure 3 A schematic cross-sectional view of surface AA in the embodiment; Figure 5 This is a side view of the assembled structure of the first cover, the second cover, and the retaining spring in an embodiment of this application. Figure 6 This is an exploded structural diagram of the cylinder head structure in an embodiment of this application; Figure 7 This is a cross-sectional view of the cylinder head structure in an embodiment of this application; Figure 8 for Figure 7 An enlarged structural diagram at point B in the embodiment.

[0017] in: 100 - First cover; 101 - Intake chamber; 102 - Mounting chamber; 103 - Partition wall; 104 - Snap ring mounting support point; 200 - Second cover; 201 - Exhaust chamber; 201 - Outer wall of the chamber; 300-valve plate assembly; 400-Cylinder seat; 500 - Sound insulation components; 600-Snap ring; 700 - Intake silencer. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] Throughout the specification and claims, the following terms will have at least the meaning explicitly associated herein, unless the context otherwise requires. The meanings defined below are not intended to limit the terms, but are merely illustrative examples. In the description of this invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments," as used herein, does not necessarily refer to the same embodiment when used multiple times, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or," unless the context clearly specifies otherwise. The term "based on" is not exclusive and allows for reliance on additional factors not described, unless the context clearly specifies otherwise. The word "exemplary" herein means "used as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. The scope of this invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely illustrate some of the many possible embodiments of the claimed invention. The various embodiments provided in this invention should not be construed as limiting the scope of protection of this invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Background Introduction In compressors, temperature transfer along the intake and exhaust paths significantly impacts compressor performance. Excessive temperature in the intake path leads to compressor overheating, affecting intake efficiency. Conversely, excessive temperature diffusion in the exhaust path results in high internal compressor temperatures, causing both intake overheating and increased temperatures in moving parts. This leads to increased lubricant vaporization and high bearing lubrication consumption, negatively impacting both compressor performance and reliability.

[0025] Based on this, such as Figures 1-8 As shown, a first aspect of this application provides a cylinder head structure for installation in a compressor and forming an intake chamber and an exhaust chamber for refrigerant flow in the compressor. The cylinder head structure includes: A first cover 100 and a second cover 200. The first cover 100 has a separate intake chamber 101 and a mounting chamber 102. The second cover 200 is embedded in the mounting chamber 102 of the first cover 100 and has an exhaust chamber 201. The intake chamber 101 is used for the flow of low-temperature, low-pressure refrigerant when the cylinder head structure is installed in the compressor. The exhaust chamber 201 is used for the discharge of high-temperature, high-pressure refrigerant when the cylinder head structure is installed in the compressor. The suction chamber 101, which is used for the inflow of low-temperature and low-pressure refrigerant, is made of heat-insulating material, and the exhaust chamber 201, which is used for the discharge of high-temperature and high-pressure refrigerant, is made of metal material and its surface is coated with a heat-insulating coating.

[0026] In this embodiment, the cylinder head structure is configured as a split type, consisting of a first cover and a second cover. Sound-insulating material is used in the intake chamber of the first cover to reduce heat absorption, prevent overheating of the compressor intake, and improve intake efficiency. The exhaust chamber of the second cover uses metal material coated with a heat-insulating coating. On one hand, the metal exhaust chamber effectively handles high-temperature, high-pressure refrigerant, preventing thermal damage such as thermal deformation of the exhaust chamber. On the other hand, coating the metal exhaust chamber surface with a heat-insulating layer reduces the outward diffusion of high temperatures from the cylinder head. When the cylinder head structure is located inside the compressor housing, it helps reduce the internal temperature between the compressor housing and the cylinder head structure, thereby reducing high-temperature vaporization of lubricating oil, reducing bearing lubrication power consumption caused by high temperatures, improving efficiency and reliability, and simultaneously reducing exhaust energy loss and improving exhaust efficiency.

[0027] Furthermore, in some possible implementations, such as Figures 1-3 As shown, a partition wall 103 connects the air intake chamber 101 and the mounting chamber 102 of the first cover 100, and the exhaust chamber 201 of the second cover 200 has an outer wall 202. The outer wall 202 of the second cover 200, which is embedded in the mounting cavity 102, is at least partially attached to the partition wall 103 of the first cover 100.

[0028] In this embodiment of the application, the outer wall 202 of the cavity of the second cover 200 is at least partially attached to the partition wall 103 of the first cover 100. This achieves both the embedding and assembly of the two and a better heat insulation effect.

[0029] Furthermore, in some possible implementations, such as Figures 1-3 As shown, the contour of the mounting cavity 102 of the first cover 100 is adapted to the outer contour of the second cover 200. The outer contour of the second cover 200, which is embedded in the mounting cavity 102, fits together with the contour of the mounting cavity.

[0030] In this embodiment, by fitting the outer contour of the second cover 200 embedded in the mounting cavity 102 with the contour of the mounting cavity, the first cover 100 and the second cover 200 can be fully and tightly fitted together.

[0031] Specifically, in some possible implementations, the first cover 100 having the air intake cavity 101 is made of composite material and insulating material; The second cover 200, which forms the exhaust cavity 201, is made of metal and its surface is coated with a heat-insulating coating.

[0032] That is, by making the first cover 100 from composite materials and insulating materials, and the second cover 200 from metal materials with a heat-insulating coating on its surface, and by making the two fully and tightly embedded together, heat exchange between the airflow in the intake chamber and the exhaust chamber can be avoided to the greatest extent, thereby improving the intake and exhaust effect.

[0033] Furthermore, in some possible implementation methods, such as Figures 1-4 As shown, the suction chamber 101 of the first cover 100 has suction chamber openings on both sides in the direction of refrigerant flow of the compressor, and the mounting chamber 102 of the first cover 100 has a mounting chamber opening on one side in the direction of refrigerant flow of the compressor and a closed end on the other side. The exhaust chamber 201 of the second cover 200 has an exhaust chamber opening on one side in the direction of refrigerant flow of the compressor, and a closed end on the other side. The second cover 200 is embedded in the mounting cavity 102 through the mounting cavity opening of the first cover 100, and the opening direction of the exhaust cavity 201 of the second cover 200 is the same as the opening direction of the mounting cavity 102.

[0034] Preferably, the first cover 100 and the second cover 200 are integrally injection molded.

[0035] Furthermore, in some possible implementations, such as Figure 4 , Figure 7 and Figure 8 As shown, the mounting cavity opening of the first cover 100 and the exhaust cavity opening of the second cover 200 define a valve plate mounting space with a mounting depth of x in the refrigerant flow direction of the compressor. The cylinder head structure also includes: Valve plate assembly 300 and cylinder seat 400, the valve plate assembly 300 is embedded in the valve plate mounting space and cooperates with the cylinder seat 400 in the valve plate mounting space; The outer periphery of the mating area of ​​the valve plate assembly 300 and the cylinder seat 400 is fitted with the mounting cavity opening of the first cover 100 so as to seal the mating area of ​​the valve plate assembly 300 and the cylinder seat 400 through the first cover 100.

[0036] In this embodiment, the first cover 100 encloses the second cover 200 and the valve plate assembly 300, which helps reduce the amount of lubricating oil entering the compression chamber and thus reduces the compressor's oil discharge rate. It is worth noting that during compressor operation, some lubricating oil splashed onto the compressor cylinder head seeps into the compression chamber through the gaps between the valve plate assembly 300 and the cylinder head, and between the valve plate assembly 300 and the cylinder seat 400, resulting in a high compressor oil discharge rate. In this embodiment, by increasing the extension length of the first cover 100, it can enclose the gaps between the valve plate assembly 300 and the cylinder head, and between the valve plate assembly 300 and the cylinder seat 400, preventing lubricating oil splashed onto the compressor cylinder head from entering the compression chamber through these gaps, thereby reducing the compressor's oil discharge rate.

[0037] Furthermore, in some possible implementations, such as Figures 1-4 As shown, a sealed chamber extending along the refrigerant flow direction of the compressor is defined between the closed end of the exhaust chamber 201 and the closed end of the mounting chamber 102.

[0038] In this embodiment, by leaving cavities (i.e., the aforementioned sealed chambers) in parts of the first cover 100 and the second cover 200, the aerodynamic noise caused by airflow pulsation transmitted from the cylinder head can be reduced. It is worth noting that this cavity is directly opposite the refrigerant exhaust path, thus effectively reducing the aerodynamic noise caused by airflow pulsation transmitted from the cylinder head along the refrigerant exhaust path.

[0039] Furthermore, in some possible implementations, the sealed chamber is filled with a sound-insulating component 500; The sound insulation component 500 is composed of multiple layers of materials with different acoustic impedances.

[0040] Specifically, in this embodiment of the application, the sound insulation component 500 is composed of multiple layers of materials with different acoustic impedances. This allows for the reduction of sound energy propagation by utilizing the acoustic impedance mismatch between the layers of the sound insulation component to generate multiple reflections between the layers.

[0041] Furthermore, in some possible implementations, the air intake chamber 101 of the first cover 100 is provided with a snap ring mounting position, which is designed to be hollow and form a snap ring mounting support point 104. The cylinder head structure also includes: Snap ring 600 is set at the snap ring mounting position and supported on the snap ring mounting support point 104; The intake silencer 700 is mounted on the first cover 100 via a retaining ring 600.

[0042] In this embodiment, a hollow structure is provided at the spring clip mounting position of the first cover 100, retaining only the spring clip mounting support point. The intake muffler 700 is mounted on the first cover 100 having an intake chamber 101 via the spring clip 600. The hollow structure design helps to reduce the heat exchange area between the head of the intake muffler 700 and the first cover 100, which can further reduce the intake temperature of the first cover 100 and improve the intake efficiency of the compressor.

[0043] Compared to conventional cylinder head structures, this application's embodiments feature a split cylinder head structure. A low-thermal-conductivity composite material is used in the low-temperature, low-pressure chamber of the cylinder head to reduce heat absorption in this chamber, preventing compressor intake overheating and improving intake efficiency. An organosilicon high-temperature resistant coating is used in the high-temperature, high-pressure chamber of the cylinder head to reduce temperature diffusion outwards, which helps lower the compressor's internal temperature, reduce high-temperature lubricant vaporization, and decrease bearing lubrication power consumption caused by high temperatures, thereby improving efficiency and reliability. Simultaneously, it reduces exhaust energy loss and improves exhaust efficiency.

[0044] Meanwhile, a cavity structure is designed between the low-temperature and low-pressure chamber and the high-temperature and high-pressure chamber in the cylinder head, and sound-absorbing materials are placed inside the cavity, which helps to reduce the intake noise caused by the intake and exhaust pulsation of the compressor.

[0045] Specifically, to gain a clearer understanding of the cylinder head structure provided in the embodiments of this application, the following will be combined with... Figures 1-8 A detailed explanation of the underlying principles: As attached Figures 1-4 As shown, the split cylinder head structure in this embodiment is composed of a first cover 100 having an intake chamber 101, a second cover 200 having an exhaust chamber 201, and a sound insulation component 500 between the first cover 100 and the second cover 200. This split cylinder head structure helps to reduce temperature transfer between the intake and exhaust chambers, lower the intake temperature, and improve intake efficiency.

[0046] like Figure 3 and Figure 7As shown, the compressor intake side draws in low-temperature, low-pressure refrigerant from the intake chamber 101 of the first cover 100. After being compressed into high-temperature, high-pressure refrigerant in the compression chamber, it flows through the exhaust chamber 201 of the second cover 200 and is discharged from the compressor. During this cycle, due to the significant temperature difference between the intake chamber 101 of the first cover 100 and the exhaust chamber 201 of the second cover 200, the heat from the high-temperature, high-pressure refrigerant flowing through the exhaust chamber is transferred to the intake chamber 101 of the first cover 100, causing the intake temperature to rise and the density of the intake refrigerant to decrease. This reduces the amount of refrigerant actually compressed in a single cycle, resulting in decreased intake efficiency and reduced cooling capacity.

[0047] To reduce heat transfer between the intake and exhaust portions of the cylinder head, this embodiment employs a split cylinder head structure to minimize temperature transfer between the intake and exhaust chambers. The first cover 100, serving as the intake portion of the cylinder head, is made of a material with low thermal conductivity, including composite materials and some insulating materials, such as PBT (polytetramethyl terephthalate) and ABC (a terpolymer of acrylonitrile, butadiene, and styrene), with a thermal conductivity of only approximately 0.26 W / mK to 0.27 W / mK. Using a cylinder head intake section made of a low thermal conductivity material effectively reduces the temperature transfer of the high-temperature, high-pressure refrigerant to the second cover 200, which serves as the cylinder head exhaust section. Simultaneously, the complete enclosure of the cylinder head exhaust section by the intake section (i.e., the first cover 100 completely encloses the second cover 200) further reduces the transfer of high-temperature refrigerant from the cylinder head exhaust section to the compressor interior. This helps lower the internal temperature of the compressor, reduce the temperature of the lubricating oil and moving components, decrease lubricating oil vaporization due to high temperatures, improve the reliability of moving components, reduce bearing lubrication power consumption, and increase compressor efficiency. The second cover, serving as the cylinder head exhaust section, uses conventional aluminum, which meets both the requirements for high exhaust temperature resistance and structural strength.

[0048] For ease of understanding, the following explanation will further illustrate the principle by using the first cover 100 as the intake section of the cylinder head and the second cover 200 as the exhaust section of the cylinder head: As attached Figure 2 and Figure 3As shown, a high-temperature resistant coating is applied to the surface of the cylinder head exhaust section to further reduce the diffusion of high temperatures from the cylinder head exhaust section. This helps to reduce exhaust energy loss, improve compressor efficiency, and simultaneously lower the internal temperature of the compressor, thus improving compressor reliability. According to the ideal gas law, for the same exhaust mass flow rate, an increase in exhaust temperature leads to an increase in exhaust pressure and exhaust efficiency. At the same time, the saved heat will not diffuse into the compressor interior, causing an increase in the temperature of the internal lubricating oil and moving parts, thereby increasing bearing lubrication power consumption. The high-temperature resistant coating in this embodiment uses an organosilicon high-temperature resistant coating, including SiC (silicon carbide) high-temperature resistant ceramic coatings, TiSiN (titanium silicon) high-temperature resistant ceramic coatings, etc.

[0049] like Figure 1 and Figure 5 As shown, the intake section of the cylinder head features a hollow structure at the circlip mounting position (i.e., excess material is removed from the intake muffler mounting position on the cylinder head, leaving only the support ribs to reduce the contact area between the intake muffler and the cylinder head), retaining only the circlip mounting support point. The intake muffler 700 is mounted on the intake section of the cylinder head (i.e., the first cover 100) via the circlip 600. The hollow structure design helps reduce the heat exchange area between the head of the intake muffler 700 and the intake section of the cylinder head, further reducing the intake temperature and improving the compressor's intake efficiency.

[0050] like Figure 4 , Figure 6 and Figure 7 As shown, a cavity (i.e., the aforementioned sealed chamber) is left between the intake and exhaust sections of the cylinder head. This split-type cylinder head structure acts as a soundproof enclosure, effectively reducing aerodynamic noise caused by airflow pulsation transmitted from the cylinder head. The sound insulation component 500 is typically composed of several layers of material. Due to the mismatch in acoustic impedance between the layers, multiple reflections occur between them, weakening the propagation of sound energy. The intermediate layer provides elastic buffering and absorption for the structural vibrations of the first layer, allowing the sound energy to be attenuated before being transmitted to the second layer (e.g., ...). Figure 7 As shown, the first, middle, and second layers refer to the transmission of exhaust airflow noise from the cylinder head exhaust section to the sealed chamber, then to the cylinder head intake section, and finally through the cylinder head intake section to the outside of the engine. That is, the first layer corresponds to the cylinder head exhaust section, which is also the second cover 200; the middle layer corresponds to the sealed chamber between the first and second covers; and the second layer corresponds to the cylinder head intake section, which is also the first cover. This improves the limitation of the mass law and increases the overall sound insulation.

[0051] Furthermore, by setting a cylinder head intermediate filler in the middle layer (i.e., setting a sound insulation component 500 in the sealed cavity), the sound insulation can be further improved. A rigid connection between two layers will create a "sound bridge," allowing some of the sound energy from the previous layer to be directly transmitted to the next layer, significantly reducing the sound insulation. Therefore, the sound insulation component in this embodiment uses an elastic connection, filling the space between the two layers with sound-absorbing material. This reduces the standing wave resonance phenomenon in the high-frequency band without creating a "sound bridge," thereby improving the high-frequency sound insulation. The sound-absorbing materials used in the sound insulation component 500 in this embodiment include: ultrafine glass wool, asphalt glass wool felt, asphalt slag wool, polyurethane foam, microporous sound-absorbing bricks, wood fiberboard, PMI (polymethyl methacrylate), PVC (polyvinyl chloride), PEI (polyetherimide), etc.

[0052] like Figure 4 , Figure 6 and Figure 7 As shown, the cylinder head intake portion (i.e., the first cover 100) covers the cylinder head exhaust portion (i.e., the second cover 200), the cylinder head intermediate filler (i.e., the sound insulation component 500), and the valve plate assembly 300, which helps reduce the amount of lubricating oil entering the compression chamber and reduces the compressor's oil discharge rate. During compressor operation, some lubricating oil splashed onto the compressor cylinder head seeps into the compression chamber through the gaps between the valve plate assembly 300 and the cylinder head, and between the valve plate assembly 300 and the cylinder seat 400, resulting in a high compressor oil discharge rate. In this embodiment, the cylinder head intake portion has a longer extension length (i.e., the first cover 100 has an increased extension length), which covers the gaps between the valve plate assembly 300 and the cylinder head, and between the valve plate assembly 300 and the cylinder seat 400, preventing lubricating oil splashed onto the compressor cylinder head from entering the compression chamber through the gaps and reducing the compressor's oil discharge rate.

[0053] Furthermore, a second aspect of the present application also provides a pump body assembly, which is installed in a compressor for compressing the refrigerant in the compressor, wherein the pump body assembly includes the cylinder head structure provided in the first aspect of the present application.

[0054] Furthermore, a third aspect of the present application also provides a compressor, which includes a housing and a pump assembly disposed in the housing, the pump assembly being the pump assembly provided in the second aspect of the present application.

[0055] Preferably, the compressor described above is a piston compressor.

[0056] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0057] The sequence numbers or order of description of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cylinder head structure for installation in a compressor and forming an intake chamber and an exhaust chamber for refrigerant flow in the compressor, characterized in that, The cylinder head structure includes: A first cover (100) and a second cover (200), wherein the first cover (100) has a separate intake chamber (101) and a mounting chamber (102), the second cover (200) is embedded in the mounting chamber (102) of the first cover (100), and the second cover (200) has an exhaust chamber (201), wherein the intake chamber (101) is used to allow low-temperature, low-pressure refrigerant to flow in when the cylinder head structure is installed in the compressor, and the exhaust chamber (201) is used to discharge high-temperature, high-pressure refrigerant when the cylinder head structure is installed in the compressor; The suction chamber (101) for the inflow of low-temperature, low-pressure refrigerant is made of heat-insulating material, and the exhaust chamber (201) for the discharge of high-temperature, high-pressure refrigerant is made of metal material and its surface is coated with a heat-insulating coating.

2. The cylinder head structure according to claim 1, characterized in that, A partition wall (103) connects the air intake chamber (101) and the mounting chamber (102) of the first cover (100), and the exhaust chamber (201) of the second cover (200) has an outer wall (202). The outer wall (202) of the second cover (200) embedded in the mounting cavity (102) is at least partially attached to the partition wall (103) of the first cover (100).

3. The cylinder head structure according to claim 2, characterized in that, The mounting cavity (102) of the first cover (100) is contoured to fit the outer contour of the second cover (200); The outer contour of the second cover (200) embedded in the mounting cavity (102) fits together with the contour of the mounting cavity.

4. The cylinder head structure according to any one of claims 1-3, characterized in that, The first cover (100) having the air intake cavity (101) is made of composite material and insulating material; The second cover (200) having the exhaust chamber (201) is made of metal and its surface is coated with a heat-insulating coating.

5. The cylinder head structure according to any one of claims 1-3, characterized in that, The first cover (100) has suction chamber openings on both sides of the compressor refrigerant flow direction in the suction chamber (101), and the first cover (100) has a mounting chamber opening on one side of the compressor refrigerant flow direction and a closed end on the other side. The exhaust chamber (201) of the second cover (200) has an exhaust chamber opening on one side in the direction of refrigerant flow of the compressor, and a closed end on the other side; The second cover (200) is embedded in the mounting cavity (102) through the mounting cavity opening of the first cover (100), and the opening direction of the exhaust cavity (201) of the second cover (200) is the same as the opening direction of the mounting cavity (102).

6. The cylinder head structure according to claim 5, characterized in that, The mounting cavity opening of the first cover (100) and the exhaust cavity opening of the second cover (200) define the valve plate mounting space in the refrigerant flow direction of the compressor; The cylinder head structure also includes: A valve plate assembly (300) and a cylinder seat (400), wherein the valve plate assembly (300) is embedded in the valve plate mounting space and cooperates with the cylinder seat (400) in the valve plate mounting space; The outer periphery of the mating area of ​​the valve plate assembly (300) and the cylinder seat (400) is fitted with the mounting cavity opening of the first cover (100) to seal the mating area of ​​the valve plate assembly (300) and the cylinder seat (400) through the first cover (100).

7. The cylinder head structure according to claim 5, characterized in that, A sealed chamber extending along the refrigerant flow direction of the compressor is defined between the closed end of the exhaust chamber (201) and the closed end of the mounting chamber (102).

8. The cylinder head structure according to claim 7, characterized in that, The sealed chamber is filled with sound insulation components (500). The sound insulation component (500) is composed of multiple layers of materials with different acoustic impedances.

9. The cylinder head structure according to any one of claims 1-3, characterized in that, The first cover (100) has a spring clip mounting position at the air intake chamber (101) position. The spring clip mounting position is designed to be hollow and has a spring clip mounting support point (104). The cylinder head structure also includes: A retaining ring (600) is disposed at the retaining ring mounting position and supported on the retaining ring mounting support point (104); An intake silencer (700) is mounted on the first cover (100) by means of a retaining ring (600).

10. A pump assembly installed in a compressor for compressing refrigerant in the compressor, characterized in that, The pump body assembly includes the cylinder head structure according to any one of claims 1-9.

11. A compressor, characterized in that, It includes a housing and a pump assembly disposed within the housing, the pump assembly being the pump assembly of claim 10.

12. The compressor according to claim 11, characterized in that, The compressor is a piston compressor.

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