High-efficiency gas distribution mechanism of ultra-low-clearance sinking three-layer valve plate micro-compressor

Abstract

This application provides a high-efficiency gas distribution mechanism for an ultra-low clearance, recessed three-layer valve plate micro compressor, applied in the field of linear compressor intake and exhaust gas distribution structure technology. It includes a valve seat body, an inner valve body ring installed inside the valve seat body, a valve seat ring installed inside the inner side of the inner valve body ring, and limit rings integrally formed at the top and bottom of the valve seat body. An upper limit valve plate is installed at the top of the valve seat body inside the limit ring, with a pressure port at its top. A lower limit valve plate is installed at the bottom of the valve seat body inside the limit ring, and an upper valve ring is installed at the top of the valve seat body outside the limit ring, with an upper limit pressure plate installed at its top. This mechanism adopts a recessed three-layer valve plate stacking structure, which can control the compression clearance to 0.25mm, reducing residual refrigerant expansion loss and improving compressor volumetric efficiency and refrigeration performance. Relying on the limit rings and limit pressure plates for positioning and limiting, it improves the coaxiality of the valve plate assembly and its operational reliability.

Description

Technical Field

[0001] This application relates to the technical field of linear compressor intake and exhaust gas distribution structure, and in particular to a high-efficiency gas distribution mechanism for an ultra-low clearance sinking three-layer valve plate micro compressor. Background Technology

[0002] Miniature refrigeration compressors are widely used in small refrigeration equipment, and the gas distribution valve is the core component that determines the compressor's volumetric efficiency and cooling output.

[0003] However, the valve plates of existing conventional micro compressors are directly laid flat on the cylinder end face without any space for recessed assembly, and the cylinder compression clearance is generally greater than 0.45mm. After the compression stroke is completed, the high-pressure residual refrigerant gas left in the cylinder will expand again, squeezing the effective volume of the cylinder, which reduces the quality of fresh refrigerant actually drawn into the compressor, resulting in a decrease in compressor volumetric efficiency and damage to cooling output capacity. Summary of the Invention

[0004] This application aims to solve the technical problem that existing conventional micro compressors have valve plates that are laid flat, with no space for recessed assembly, and a compression clearance greater than 0.45mm. After compression, the residual high-pressure refrigerant in the cylinder expands again, squeezing out the effective volume and reducing the amount of fresh refrigerant drawn in, which leads to a decrease in the volumetric efficiency and refrigeration output of the compressor. The application provides a high-efficiency gas distribution mechanism for an ultra-low clearance recessed three-layer valve plate micro compressor.

[0005] This application employs the following technical means to solve the technical problem: a high-efficiency gas distribution mechanism for an ultra-low clearance recessed three-layer valve plate micro compressor, comprising a valve seat body, an inner valve inner ring installed inside the valve seat body, a valve seat ring installed on the inner side of the inner valve inner ring, a limit ring integrally formed on the top and bottom of the valve seat body, an upper limit valve plate installed on the top of the valve seat body inside the limit ring, the upper limit valve plate having a pressure plate opening on its top, a lower limit valve plate installed on the bottom of the valve seat body inside the limit ring, an upper valve ring installed on the top of the valve seat body outside the limit ring, an upper limit pressure plate installed on the top of the upper valve ring, and a lower valve ring installed on the bottom of the valve seat body outside the limit ring.

[0006] Preferably, there are two limiting rings, and the two limiting rings are the same size.

[0007] Preferably, a central valve plate is installed at the bottom of the lower limit valve plate, and a hole is opened at the center of the central valve plate.

[0008] Preferably, a lower limit pressure plate is installed at the bottom of the lower valve ring, and a hole is opened at the center of the lower limit pressure plate.

[0009] Preferably, the top of the upper limit pressure plate has an opening, and there are three openings.

[0010] Preferably, the thickness of the upper limit valve plate and the lower limit valve plate is 0.15mm.

[0011] Preferably, the thickness of the upper limit pressure plate and the lower limit pressure plate is 0.32 mm.

[0012] Preferably, the diameter of the limiting ring is adapted to the inner diameter of the upper valve ring and the lower valve ring.

[0013] Preferably, both the upper valve ring and the lower valve ring are annular structures, and the upper valve ring and the lower valve ring are the same size.

[0014] Preferably, the thickness of the valve seat ring is 0.3 mm.

[0015] This application provides a high-efficiency gas distribution mechanism for an ultra-low clearance, recessed three-layer valve plate micro compressor, which has the following advantages: This ultra-low clearance, recessed three-layer valve plate micro compressor's high-efficiency gas distribution mechanism employs a recessed three-layer valve plate stacking structure. Through the cooperation of the valve seat ring and the recessed step of the cylinder, the compression clearance at the piston's top dead center is constrained to 0.25mm. Compared to existing large clearance flat-lay valve plate structures, the volume of residual high-pressure refrigerant inside the cylinder after compression is significantly reduced. This effectively suppresses the re-expansion of residual gas from crowding out the effective cylinder volume, improving the quality of fresh refrigerant actually drawn into the cylinder, thereby increasing the compressor's volumetric efficiency and enhancing the overall refrigeration output performance. Simultaneously, this mechanism uses limiting rings to achieve radial positioning of each valve plate and valve ring, while upper and lower limiting pressure plates constrain the valve plate opening stroke. This ensures the coaxiality of component assembly and prevents excessive impact, deformation, and breakage of the valve plates due to repeated refrigerant impacts, improving the reliability and service life of the valve plate assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a sectional view of the valve seat body of this application; Figure 3 This is a partial structural diagram of the upper limit pressing of this application; Figure 4 This is a partial exploded view of the valve seat body of this application; Figure 5 This is a partial structural schematic diagram of the valve seat body of this application; Figure 6 This is a partial structural diagram of the valve body inner ring of this application.

[0017] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0018] In the diagram: 1. Valve seat body; 101. Limiting ring; 102. Valve body inner ring; 103. Valve seat ring; 2. Upper valve ring; 3. Upper limit pressure plate; 301. Through port; 4. Lower valve ring; 5. Lower limit pressure plate; 6. Upper limit valve plate; 601. Pressure plate port; 7. Lower limit valve plate; 701. Center valve plate. Detailed Implementation

[0019] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that the terms "comprising," "including," and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses. Terms such as "first" and "second" in the claims, specification, and accompanying drawings of this application, as well as relational terms, are used merely to distinguish one entity / operation / object from another entity / operation / object, and do not necessarily require or imply any such actual relationship or order between these entities / operations / objects.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] Reference Appendix Figure 1 - Figure 6This invention provides a technical solution: a high-efficiency gas distribution mechanism for an ultra-low clearance sinking three-layer valve plate micro compressor, comprising a valve seat body 1, an inner valve body ring 102 installed inside the valve seat body 1, a valve seat ring 103 installed on the inner side of the inner valve body ring 102, a limit ring 101 integrally formed on the top and bottom of the valve seat body 1, an upper limit valve plate 6 installed on the top of the valve seat body 1 inside the limit ring 101, a pressure plate opening 601 on the top of the upper limit valve plate 6, a lower limit valve plate 7 installed on the bottom of the valve seat body 1 inside the limit ring 101, an upper valve ring 2 installed on the top of the valve seat body 1 outside the limit ring 101, an upper limit pressure plate 3 installed on the top of the upper valve ring 2, and a lower valve ring 4 installed on the bottom of the valve seat body 1 outside the limit ring 101.

[0024] Furthermore, there are two limit rings 101, and the two limit rings 101 are the same size. The limit rings 101 can limit the upper valve ring 2 and the lower valve ring 4, and at the same time, they can radially position the upper limit valve plate 6 and the lower limit valve plate 7 on the inner side to ensure the coaxiality of the assembly of each component.

[0025] Furthermore, a central valve plate 701 is installed at the bottom of the lower limit valve plate 7. A hole is opened in the center of the central valve plate 701. The central valve plate 701 and the lower limit valve plate 7 cooperate to form an intake valve plate assembly. The hole in the center allows the refrigerant to flow, thereby realizing the on / off control of the intake channel.

[0026] Furthermore, a lower limit pressure plate 5 is installed at the bottom of the lower valve ring 4. A hole is opened in the center of the lower limit pressure plate 5 for refrigerant flow. At the same time, the lower limit pressure plate 5 can limit the maximum downward opening deflection of the lower limit valve plate 7 and the center valve plate 701, so as to avoid excessive deformation and fatigue fracture of the valve plate.

[0027] Furthermore, the top of the upper limit pressure plate 3 is provided with a through port 301. There are three through ports 301. Multiple through ports 301 form an exhaust flow channel to ensure that the exhaust refrigerant flows out smoothly. At the same time, the upper limit pressure plate 3 can limit the upward opening stroke of the upper limit valve plate 6 to prevent the valve plate from being damaged due to excessive slapping.

[0028] Furthermore, the upper limit valve plate 6 and the lower limit valve plate 7 have a thickness of 0.15mm. This thickness takes into account both the elastic deformation capability and structural strength of the valve plate, so that it can be flexibly opened and closed under the action of cylinder pressure difference, and can resist repeated impact of refrigerant, thus extending the service life of the valve plate.

[0029] Furthermore, the upper limit pressure plate 3 and the lower limit pressure plate 5 are 0.32mm thick. The larger plate thickness increases the structural rigidity of the pressure plate itself, making it less prone to warping and deformation under pressure, and enabling it to stably play the role of limiting the valve plate stroke.

[0030] Furthermore, the diameter of the limiting ring 101 is adapted to the inner diameter of the upper valve ring 2 and the lower valve ring 4. During assembly, the upper valve ring 2 and the lower valve ring 4 can be directly sleeved on the outside of the limiting ring 101 to achieve rapid positioning and assembly and reduce the risk of assembly misalignment.

[0031] Furthermore, both the upper valve ring 2 and the lower valve ring 4 are annular structures, and the upper valve ring 2 and the lower valve ring 4 are the same size, making the valve plate assembly structure on the intake side and the exhaust side completely interchangeable, and the parts can be interchanged, reducing the cost of parts mold opening and material management.

[0032] Furthermore, the valve seat ring 103 has a thickness of 0.3mm, which matches the depth of the cylinder block recessed step. Together with the recessed installation structure, it constrains the compression clearance at the top dead center of the compressor piston, reduces the volume of residual high-pressure refrigerant in the cylinder, and improves the volumetric efficiency of the compressor.

[0033] Working principle: When using the high-efficiency gas distribution mechanism of the ultra-low clearance sinking three-layer valve plate micro compressor, the operator installs the inner ring 102 of the valve body into the valve seat body 1, and assembles the valve seat ring 103 inside the inner ring 102 of the valve body; installs the upper limit valve plate 6 and the lower limit valve plate 7 into the inner sides of the limit rings 101 at both ends of the valve seat body 1; fits the upper valve ring 2 and the lower valve ring 4 onto the outer sides of the limit rings 101 at both ends; fixes the upper limit pressure plate 3 on the top of the upper valve ring 2 and the lower limit pressure plate 5 on the bottom of the lower valve ring 4, thus completing the assembly of the gas distribution mechanism components.

[0034] During assembly, a 0.3mm deep recessed step is milled on the upper end face of the compressor cylinder, and the exhaust-side three-layer composite valve plate assembly is embedded inside the step. A recessed step of the same depth is milled on the lower end face of the cylinder, and the intake-side three-layer composite valve plate assembly is embedded therein. The intake and exhaust assemblies employ identical three-layer valve plate stacking structures. In this embodiment, the compressor piston has a maximum stroke of 7.2mm. After assembly, the piston reaches top dead center, forming a fixed compression clearance of 0.25mm between the piston end face and the valve plates.

[0035] As the compressor piston reciprocates, the internal pressure of the cylinder changes periodically. The pressure difference between the inside and outside of the cylinder drives the upper limit valve 6 and the lower limit valve 7 to open and close, completing the refrigerant intake and exhaust cycle. The upper limit pressure plate 3 and the lower limit pressure plate 5 limit the maximum opening stroke of the valve plates, preventing excessive deformation due to excessive impact. With the valve assembly recessed, the compression clearance is constrained to 0.25mm. After compression, the volume of residual high-pressure refrigerant in the cylinder is significantly reduced, suppressing residual gas re-expansion losses, increasing the effective intake volume of the cylinder, and improving volumetric efficiency and refrigeration output.

[0036] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency gas distribution mechanism for an ultra-low clearance submerged three-layer valve plate micro compressor, characterized in that, The valve includes a valve seat body, inside which a valve inner ring is installed. A valve seat ring is installed on the inner side of the valve inner ring. Limiting rings are integrally formed at the top and bottom of the valve seat body. An upper limit valve plate is installed on the top of the valve seat body, inside the limiting ring, and the upper limit valve plate has a pressure port at its top. A lower limit valve plate is installed on the bottom of the valve seat body, inside the limiting ring. An upper valve ring is installed on the top of the valve seat body, outside the limiting ring, and an upper limit pressure plate is installed on its top. A lower valve ring is installed on the bottom of the valve seat body, outside the limiting ring.

2. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, Two limiting rings are provided, and the two limiting rings are the same size.

3. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, A central valve plate is installed at the bottom of the lower limit valve plate, and a hole is opened at the center of the central valve plate.

4. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, A lower limit pressure plate is installed at the bottom of the lower valve ring, and a hole is opened at the center of the lower limit pressure plate.

5. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, The top of the upper limit pressing tablet has an opening, and there are three openings.

6. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, The thickness of the upper limit valve plate and the lower limit valve plate is 0.15mm.

7. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, The thickness of the upper limit pressure plate and the lower limit pressure plate is 0.32 mm.

8. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, The diameter of the limiting ring is adapted to the inner diameter of the upper valve ring and the lower valve ring.

9. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, Both the upper and lower valve rings are annular structures, and the upper and lower valve rings are the same size.

10. The high-efficiency gas distribution mechanism of the ultra-low clearance submerged three-layer valve plate micro compressor according to claim 1, characterized in that, The thickness of the valve seat ring is 0.3 mm.

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