Cylinder head component with expanded cylinder cover and compressor

Abstract

The utility model provides a cylinder head component for expanding a cylinder cover and a compressor. The sides, away from an air suction inlet, of a cylinder cover and a valve plate extend outwards, the cylinder cover crosses the edge of a cylinder base to form an extension portion, the valve plate crosses the edge of the cylinder base to form an extension portion, and an inclined face is arranged on the end face of the side, facing the valve plate, of the cylinder cover and gradually gets close to the cylinder base in the direction from the center of the cylinder cover to the extension portion. Aiming at the problem that an existing cylinder cover is difficult to expand, the width and the volume of the cylinder cover are effectively improved in the mode that the cylinder cover expands towards the opposite side of an air suction inlet, so that a space is provided for increasing the length of a limiting plate and a valve plate, and the air suction efficiency of the cylinder cover is improved. The inclined plane is arranged on the end face of the cylinder cover to extrude the cylinder cover gasket, so that the sealing compression amount of the cylinder cover gasket at the edge position is increased, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of compressor accessories, in particular to a cylinder head component for expanding the capacity of a cylinder cover and a compressor. Background Art

[0002] The cylinder head, exhaust valve reed, limit plate, and exhaust valve plate are important components of the cylinder head components in the refrigerator compressor gas circuit system. The gas circuit system is mainly composed of the cylinder head components, pistons, cylinder holes, exhaust silencer chambers, and inner rows. This type of gas circuit system mainly generates a pressure difference through the reciprocating motion of the piston to open and close the suction and exhaust valve plates, thereby converting low-pressure and low-temperature refrigerant gas into high-pressure and high-temperature refrigerant gas, thereby achieving a refrigeration effect. The expansion of the cylinder volume is conducive to improving performance and reducing noise.

[0003] When increasing the cylinder volume, the cylinder head width is limited by the width of the bottom surface of the cylinder head, and it is difficult to achieve capacity expansion, so it is difficult to improve performance and noise. Limited by the current cylinder head width, the length of the limit plate is limited, and the lift of the valve plate needs to reach a certain height, so the transition slope of the limit plate design is steep, so there is a certain risk of valve plate reliability; after the length of the valve plate is limited, in order to pursue high performance, the thickness of the valve plate or the waist width of the valve plate is usually reduced to achieve the purpose of reducing the stiffness of the valve plate, but this method causes the reliability of the valve plate to deteriorate, and it is difficult to improve the performance and reliability of the compressor at the same time. Utility Model Content

[0004] The purpose of the utility model is to provide a cylinder head component and a compressor for expanding the capacity of a cylinder head in view of the defects in the prior art. The cylinder head is expanded toward the opposite side of the intake inlet, thereby effectively increasing the width and volume of the cylinder head, thereby providing space for increasing the length of a limit plate and a valve plate, and arranging an inclined surface on the end face of the cylinder head to squeeze the cylinder head gasket, thereby increasing the sealing compression of the cylinder head gasket at the edge position and improving the sealing effect.

[0005] The first purpose of the utility model is to provide a cylinder head component for expanding the capacity of a cylinder head, which adopts the following technical solutions:

[0006] It includes a cylinder head, a cylinder head gasket, a limit plate, an exhaust valve plate and a valve plate arranged in sequence. The cylinder head and the valve plate extend outward on a side away from the intake inlet. The cylinder head passes over the edge of the cylinder seat to form an extension portion. The valve plate passes over the edge of the cylinder seat to form an extension portion. An inclined surface is provided on the end surface of the cylinder head facing the valve plate. Along the direction from the center of the cylinder head to the extension portion, the inclined surface gradually approaches the cylinder seat. One end of the inclined surface extends to the edge of the extension portion, and the other end extends to the non-extension portion area of ​​the end surface of the cylinder head.

[0007] Furthermore, the exhaust valve plate is provided with a reed at a position corresponding to the exhaust airflow, and the reed is in a cantilever structure.

[0008] Furthermore, a stopper is provided on the limit plate, and the stopper constrains the movement range of the spring leaf in the direction of the cylinder head, and the stopper is tilted toward one side of the spring leaf.

[0009] Furthermore, one end of the reed close to the extension of the valve plate is a root, the root is connected to the exhaust valve plate, and one end of the stopper abuts against the root of the reed.

[0010] Furthermore, the cylinder head is provided with through holes for fitting screws. After the cylinder head is mounted on the cylinder seat by means of screws, the extension of the cylinder head and the extension of the valve plate form a cantilever structure.

[0011] Furthermore, the exhaust chamber of the cylinder head extends into the extension portion.

[0012] Furthermore, it also includes an intake valve plate and a valve plate gasket, the intake valve plate is located between the valve plate gasket and the valve plate, and the side of the valve plate gasket away from the intake valve plate is oriented to fit the end face of the cylinder seat.

[0013] Furthermore, the edges of the intake valve plate and the valve plate gasket are located within the range of the edge of the cylinder seat end surface.

[0014] Furthermore, the cylinder head gasket is subjected to the squeezing effect of the inclined surface, and in the direction from the edge to the center of the cylinder head gasket, the compression amount of the cylinder head gasket in the area corresponding to the inclined surface gradually decreases.

[0015] The second object of the utility model is to provide a compressor, which utilizes the cylinder head component with expanded cylinder head as described in the first object.

[0016] Compared with the prior art, the utility model has the following advantages and positive effects:

[0017] (1) In view of the problem that it is difficult to expand the capacity of the cylinder head at present, the cylinder head width and cylinder head volume can be effectively increased by expanding the cylinder head to the opposite side of the intake inlet, thereby providing space for increasing the length of the limit plate and the valve plate, and arranging an inclined surface on the end face of the cylinder head to squeeze the cylinder head gasket, increase the sealing compression of the cylinder head gasket at the edge position, and improve the sealing effect.

[0018] (2) By extending the cylinder head toward the opposite side of the intake inlet, the width of the cylinder head is increased, the layout space of the reed on the exhaust valve plate and the layout space of the stopper corresponding to the reed on the limit plate are increased, the length of the reed and the length of the stopper are extended, the deformation amplitude of the reed is reduced, and the buffering force when the reed hits the stopper is reduced, thereby improving the reliability of the reed.

[0019] (3) The inclined surface is located on the end face and the extension part of the cylinder head. The inclined surface part forms a slope extending to the edge of the cylinder head. Compared with other positions of the end face, the extrusion deformation of the cylinder head gasket in contact is greater, forming a better compression sealing effect on the edge of the cylinder head in contact, resisting the exhaust pressure, and improving the performance and reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a top view schematic diagram of the cylinder head component for expanding the cylinder head in the embodiment of the utility model.

[0022] Figure 2 It is an exploded schematic diagram of the cylinder head component for expanding the cylinder head in the embodiment of the utility model.

[0023] Figure 3 It is a schematic diagram of a cylinder head in an embodiment of the utility model.

[0024] Figure 4 It is a schematic diagram of the inclined surface on the cylinder head in the embodiment of the utility model.

[0025] Figure 5 It is a schematic diagram of the exhaust valve sheet in the embodiment of the utility model.

[0026] Figure 6 It is a schematic diagram of a limiting plate in an embodiment of the utility model.

[0027] Figure 7 It is a schematic diagram of the valve plate and the exhaust valve plate in the embodiment of the utility model.

[0028] In the figure, 1. intake muffler, 2. cylinder head screw, 3. cylinder head, 4. limit plate, 5. exhaust valve plate, 6. valve plate, 7. intake valve plate, 8. valve plate gasket, 9. cylinder seat, 10. extension part, 11. extension part, 12. inclined surface, 13. stopper, 14. cylinder head gasket. DETAILED DESCRIPTION

[0029] Example 1

[0030] In a typical implementation of the present invention, Figure 1-Figure 7 As shown, a cylinder head component for expanding the cylinder head is proposed.

[0031] like Figure 1As shown, a cylinder head component for cylinder head expansion includes a cylinder head 3, a cylinder head gasket 14, a limit plate 4, an exhaust valve plate 5 and a valve plate 6. The exhaust valve plate 5 is located between the limit plate 4 and the valve plate 6. When the cylinder is exhausted, the exhaust valve plate 5 is pushed to produce elastic deformation, and the compressed refrigerant medium is discharged into the cylinder head 3. The limit plate 4 constrains the deformation of the exhaust valve plate 5.

[0032] The cylinder head 3 and the valve plate 6 extend outwardly on a side away from the air intake inlet, and the cylinder head 3 passes over the edge of the cylinder seat 9 to form an extension portion 11, thereby increasing the width of the cylinder head 3 and achieving capacity expansion of the cylinder head 3.

[0033] like Figure 1 and Figure 2 As shown, the valve plate 6 passes over the edge of the cylinder seat 9 to form an extension portion 11, which supports and seals the extension portion 11 of the cylinder head 3. An inclined surface 12 is provided on the end surface of the cylinder head 3 facing the valve plate 6. Along the direction from the center of the cylinder head 3 to the extension portion 11, the inclined surface 12 gradually approaches the cylinder seat 9. The inclined surface 12 forms a bulge compared to the end surface of the cylinder head 3, which can enhance the squeezing effect on the cylinder head gasket 14 between the valve plate 6 and the cylinder head 3, thereby improving the sealing effect. One end of the inclined surface 12 extends to the edge of the extension portion 11, and the other end extends to the non-extension portion 11 area of ​​the end surface of the cylinder head 3.

[0034] like Figure 3 As shown, the cylinder head 3 is extended to the opposite side of the intake inlet. In this embodiment, the extension portion 11 of the cylinder head 3 is extended 6mm-10mm to the side away from the intake inlet, and the arc curvature of the outer end of the extension portion 11 of the cylinder head 3 is maintained consistent with the previous one, so that the minimum distance from the cylinder head 3 to the upper and lower 2 of the compressor is 4mm, ensuring that there is no collision with the shell, while ensuring that the volume is increased.

[0035] Specifically, a slope is added to one side of the bottom of the cylinder head 3 in the expansion direction, and the slope forms an inclined surface 12. The size of the slope is adapted to the size of the cylinder seat 9. Similarly, the size of the cylinder head gasket 14 is adapted to the size of the expanded cylinder head 3, and covers the end surface of the cylinder head 3 and the inclined surface 12. In this embodiment, Figure 3 and Figure 4 As shown, by adding a slope of 16.5 mm in length and 0.14 mm in height, the compression amount of the cylinder head gasket 14 abutted by the slope distribution position on the cylinder head 3 is increased without changing the torque of the assembly screws 2 of the cylinder head 3, thereby achieving the effect of enhancing the sealing performance.

[0036] Under the condition of the same displacement, when the intake valve plate 7 is opened, the condensing medium passes through the intake muffler 1 and enters the cylinder. After being compressed by the cylinder, when the exhaust valve plate 5 is opened and the high-pressure and high-temperature gas is discharged from the cylinder, the pressure in the chamber of the cylinder head 3 increases less relatively. Therefore, the pressure difference before and after the exhaust is reduced, the exhaust pulsation is reduced, the vibration on the exhaust side transmitted from the exhaust pipe to the refrigerator condenser is reduced, and the overall noise of the refrigerator is reduced.

[0037] During the exhaust process, since the cylinder head 3 is expanded, the pressure on the exhaust side is smaller than that of the traditional solution, so the valve plate is easier to open, the compression work is reduced, and thus the overall power is reduced and the COP is increased. At the same time, the surface area of ​​the cylinder head 3 is increased, the heat dissipation area and thermal efficiency of the cylinder head 3 are improved, and the COP is increased.

[0038] A reed is provided at the exhaust valve plate 5 corresponding to the exhaust airflow position, and the reed is a cantilever structure; a stopper 13 is provided on the limit plate 4, and the stopper 13 restricts the movement range of the reed in the direction of the cylinder head 3, and the stopper 13 is inclined toward one side of the reed; one end of the reed close to the extension portion 11 of the valve plate 6 is the root, and the root is connected to the exhaust valve plate 5, and one end of the stopper 13 abuts against the root of the reed.

[0039] like Figure 6 As shown, when the volume of the cylinder head 3 is increased by increasing the width of the cylinder head 3 and the valve plate 6, the space for arranging the entire cylinder head is increased, the space margin for accommodating the limit plate 4 is larger, the length of the limit plate 4 is increased by 5mm relative to the normal arrangement, and the length of the reed is increased by 5mm relative to the normal arrangement. Therefore, the arc of the arc surface of the exhaust valve plate 5 hitting the limit plate 4 can be changed from R90mm to R180mm, as shown in FIG. Figure 6 As shown, therefore, the buffering force received by the exhaust valve plate 5 when it hits the limiting plate 4 is reduced, and the reliability of the valve plate becomes better.

[0040] like Figure 1 As shown, the cylinder head 3 is provided with a through hole for matching the screw 2. After the cylinder head 3 is installed on the cylinder seat 9 by the screw 2, the extension 11 of the cylinder head 3 and the extension 11 of the valve plate 6 form a cantilever structure. After the cantilever structure is formed, the extension 11 of the valve plate 6 can block and support the extension 11 of the cylinder head 3. The exhaust chamber of the cylinder head 3 extends into the extension 11. The cylinder head gasket 14 between the valve plate 6 and the cylinder head 3 is squeezed by the valve plate 6 and the cylinder head 3, thereby ensuring the sealing and reliability of the exhaust chamber area included in the extension 11.

[0041] like Figure 2 As shown, it also includes an air intake valve plate 7 and a valve plate gasket 8. The air intake valve plate 7 is located between the valve plate gasket 8 and the valve plate 6. The side of the valve plate gasket 8 away from the air intake valve plate 7 faces and is used to fit the end face of the cylinder seat 9. The edges of the air intake valve plate 7 and the valve plate gasket 8 are located within the range of the edge of the end face of the cylinder seat 9.

[0042] The inclined surface 12 protrudes from the end surface of the cylinder head 3. The extrusion sealing effect of the inclined surface 12 is transmitted to the cylinder head gasket 14. The cylinder head gasket 14 receives the extrusion effect of the inclined surface 12. In the direction from the edge to the center of the cylinder head gasket 14, the compression amount of the cylinder head gasket 14 in the area corresponding to the inclined surface 12 gradually decreases, thereby increasing the compression amount of the edge of the cylinder head gasket 14 and improving the sealing effect.

[0043] The inclined surface 12 is located at the end surface and the extension portion 11 of the cylinder head 3. Part of the inclined surface 12 forms a slope extending to the edge of the cylinder head 3. Compared with other positions of the end surface, it forms a better compression sealing effect on the cylinder head gasket 14, resists exhaust pressure, and improves compressor performance and reliability.

[0044] Most valve plate breakage is caused by impact. According to previous tests, impact fatigue is approximately linearly related to thickness; and performance is closely related to valve plate stiffness. The smaller the stiffness of the exhaust valve plate 5, the easier it is to open the exhaust valve plate 5, and the smaller the compression work. The calculation formula for spring design is as follows:

[0045]

[0046] Among them, K is the stiffness, E is the elastic modulus, b is the width of the reed, h is the thickness of the reed, and L is the length of the reed, which is the arm length in the valve plate design, and is the distance from the clamping edge of the limit plate 4 to the center of the valve head. From the above formula, we can know that the greater the thickness, the greater the stiffness; the greater the arm length, the smaller the stiffness. Therefore, by increasing the arm length and thickness at the same time, while maintaining the same stiffness, the reliability can be improved.

[0047] like Figure 7 As shown, by increasing the width of the cylinder head 3 and the valve plate 6, the volume of the cylinder head 3 is increased, and the space for the entire cylinder head arrangement is increased, and the exhaust valve plate 5 can be designed with more space. In this embodiment, the length of the exhaust valve plate 5 is increased by 5mm compared with the normal arrangement (the length of the exhaust valve plate 5 can be adjusted according to the required valve plate parameters - stiffness and natural frequency). The original exhaust valve plate 5 has an arm length of 11mm and a thickness of 0.178mm.

[0048] There are two implementation methods in this embodiment:

[0049] Solution 1: The exhaust valve plate 5 has an arm length of 16mm and a thickness of 0.203mm; the stiffness is reduced by 50%, and the performance is improved by 2% through simulation and actual testing. At the same time, due to the increase in thickness, the reliability is improved by 14%.

[0050] Solution 2: The exhaust valve plate 5 has an arm length of 16mm and a thickness of 0.254mm. The rigidity is maintained unchanged. Through simulation and actual testing, the performance remains unchanged and the reliability is improved by 42%.

[0051] By expanding the cylinder head 3 toward the opposite side of the intake inlet, the width and volume of the cylinder head 3 are effectively increased, thereby providing space for increasing the length of the limit plate 4 and the valve plate, and arranging an inclined surface 12 on the end face of the cylinder head 3 to increase the sealing compression at the edge position and improve the sealing effect.

[0052] Example 2

[0053] In another typical embodiment of the present invention, Figure 1-Figure 6 As shown, a compressor is proposed.

[0054] The compressor is equipped with a cylinder head component for expanding the cylinder head as in Example 1, and the cylinder head component for expanding the cylinder head is installed on the cylinder seat 9 through the cylinder head 3 screws 2.

[0055] By expanding the cylinder head 3 toward the opposite side of the intake inlet, the width of the cylinder head 3 is increased, the space available for arranging the reed on the exhaust valve plate 5 and the space available for arranging the stopper 13 corresponding to the reed on the limit plate 4 are increased, the length of the reed and the length of the stopper 13 are extended, the deformation amplitude of the reed is reduced, and the buffering force when the reed hits the stopper 13 is reduced, thereby improving the reliability of the reed.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cylinder head component for expanding the cylinder head, characterized in that: It includes a cylinder head, a cylinder head gasket, a limit plate, an exhaust valve plate and a valve plate arranged in sequence. The cylinder head and the valve plate extend outward on a side away from the intake inlet. The cylinder head passes over the edge of the cylinder seat to form an extension portion. The valve plate passes over the edge of the cylinder seat to form an extension portion. An inclined surface is provided on the end surface of the cylinder head facing the valve plate. Along the direction from the center of the cylinder head to the extension portion, the inclined surface gradually approaches the cylinder seat. One end of the inclined surface extends to the edge of the extension portion, and the other end extends to the non-extension portion area of ​​the end surface of the cylinder head.

2. The cylinder head component for expanding the cylinder head according to claim 1, characterized in that: The exhaust valve plate is provided with a reed at a position corresponding to the exhaust airflow, and the reed is in a cantilever structure.

3. The cylinder head component for expanding the cylinder head according to claim 2, characterized in that: The limit plate is provided with a stopper which constrains the movement range of the spring sheet toward the cylinder head, and the stopper is tilted toward one side of the spring sheet.

4. The cylinder head component for expanding the cylinder head according to claim 3, characterized in that: One end of the reed close to the extension of the valve plate is a root, the root is connected to the exhaust valve plate, and one end of the stopper abuts against the root of the reed.

5. The cylinder head component for expanding the cylinder head according to claim 1, characterized in that: The cylinder head is provided with through holes for matching screws. After the cylinder head is mounted on the cylinder seat by means of screws, the extension part of the cylinder head and the extension part of the valve plate form a cantilever structure.

6. The cylinder head component for expanding the cylinder head according to claim 5, characterized in that: The exhaust chamber of the cylinder head extends into the extension portion.

7. The cylinder head component for expanding the cylinder head according to claim 1, characterized in that: It also includes an intake valve sheet and a valve plate gasket, wherein the intake valve sheet is located between the valve plate gasket and the valve plate, and the side of the valve plate gasket away from the intake valve sheet faces and is used to fit the end face of the cylinder seat.

8. The cylinder head component for expanding the cylinder head according to claim 7, characterized in that: The edges of the air intake valve plate and the valve plate gasket are located within the range of the edge of the cylinder seat end surface.

9. The cylinder head component for expanding the cylinder head according to claim 1, characterized in that: The cylinder head gasket is subjected to the extrusion effect of the inclined surface, and the compression amount of the cylinder head gasket in the area corresponding to the inclined surface gradually decreases in the direction from the edge to the center of the cylinder head gasket.

10. A compressor using the cylinder head component for expanding the cylinder head according to any one of claims 1 to 9.

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