Cylinder head assembly and compressor having the same

Abstract

The present invention provides a cylinder head assembly and a compressor having the same. The cylinder head assembly includes a cover body; a lift limit assembly, the lift limit assembly is detachably connected to the cover body, and the lift limit assembly has a vibration reduction part, which is used to reduce the noise of the exhaust valve plate hitting the cover body. A detachable lift limit assembly is arranged on the cover body, and a vibration reduction part is arranged on the lift limit assembly, so that the noise of the valve plate hitting the cover body can be reduced, and the practicality of the cylinder assembly is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor equipment, and in particular to a cylinder head assembly and a compressor having the same. Background Art

[0002] As we all know, the development direction of compressors for household appliances tends to be miniaturization, high efficiency and low noise. The requirements for low-voltage starting capability of refrigerator compressors are gradually increasing. The miniaturization, low-voltage starting capability and low noise characteristics have obvious market competitive advantages and good user experience. As people's pursuit of a better life has become the main contradiction in society, higher requirements are put forward for the space, energy saving and noise reduction of household appliances. Products with the above characteristics are becoming more and more popular with consumers.

[0003] Currently, there are various types of cylinder head structures for fully enclosed reciprocating compressors on the market. One type is that the exhaust valve lift limit is not set on the cylinder head, and the other type is that the exhaust valve lift limit is set on the cylinder head. The existing structure in which the exhaust valve is set on the cylinder head has the following limitations and problems: (1) The lift limit structure set on the cylinder head cannot be adjusted, and the lift height cannot be changed to adapt to the design requirements of different models and different displacements, and the parts have poor versatility; (2) The exhaust valve lift limit is set on the cylinder head. When the compressor is running, the exhaust valve directly hits the limit structure, and the valve impact noise is directly radiated through the cylinder head, causing the compressor noise to be high; (3) In the existing cylinder head structure, the lift limit structure is cast in one piece and is made of metal. The exhaust valve, which is also made of metal, hits the cylinder head, and the valve impact noise is relatively large, which is not conducive to the low-noise design of the compressor. Summary of the invention

[0004] The main purpose of the present invention is to provide a cylinder head assembly and a compressor having the same, so as to solve the problem in the prior art that the compressor valve plate hits the cylinder head and generates a loud noise.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a cylinder head assembly, comprising: a cover body; a lift limit assembly, the lift limit assembly being detachably connected to the cover body, the lift limit assembly having a vibration damping part, and the vibration damping part being used to reduce the noise caused by the exhaust valve plate hitting the cover body.

[0006] Furthermore, the lift limit assembly includes: a limit column, a first end of the limit column is detachably connected to the cover body, a second end of the limit column forms a stop end, and the vibration reduction part is connected to at least one end of the limit column.

[0007] Furthermore, the vibration reduction part includes: a section made of a flexible material, and the section made of the flexible material is connected to at least one end of the limiting column.

[0008] Furthermore, the flexible material segment and at least one end of the limiting column are integrally injection molded.

[0009] Furthermore, an external thread is provided on the outer surface of the first end of the limiting column.

[0010] Furthermore, the end surface of the second end of the limiting column is an inclined structure.

[0011] Furthermore, the vibration reduction part includes: a damping section, the damping section is arranged in the cover body, and the first end of the limiting column abuts against the damping section.

[0012] Furthermore, the vibration reduction part includes a damping section, which is arranged in the cover body. The lift limit assembly includes: a limit column, a first end of the limit column is detachably connected to the cover body and abuts against the damping section, and a second end of the limit column forms a stop end.

[0013] Furthermore, a countersunk hole is opened on the cover body, an internal thread is arranged on the inner circumference of the countersunk hole, an external thread matching with the internal thread is arranged on the outer circumference of the first end of the limiting column, and the length of the limiting column extending into the countersunk hole can be adjusted to change the stroke of the valve plate moving to the second end of the limiting column.

[0014] Furthermore, operating the limit column can form multiple strokes of different distances between the second end of the limit column and the valve plate. When the limit column is changed from a previous stroke position to another stroke position, the distance that the limit column extends into the counterbore is an integer multiple of the pitch of the external thread.

[0015] According to another aspect of the present invention, a compressor is provided, comprising a cylinder head assembly, wherein the cylinder head assembly is the above-mentioned cylinder head assembly.

[0016] By applying the technical solution of the present invention, a detachable lift limit assembly is provided on the cover body, and a vibration reduction part is provided on the lift limit assembly. Such a configuration can reduce the noise caused by the valve plate hitting the cover body, and effectively improves the practicality of the cylinder assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 An exploded structural schematic diagram of an embodiment of a cylinder head assembly according to the present invention is shown;

[0019] Figure 2 A cross-sectional structural schematic diagram of an embodiment of a cylinder head assembly according to the present invention is shown;

[0020] Figure 3 A schematic structural diagram of an embodiment of a limiting column according to the present invention is shown;

[0021] The above drawings include the following reference numerals:

[0022] 10. Cover body; 11. Countersunk hole;

[0023] 20. Lift limit assembly; 21. Limit column; 22. Damping section. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0028] Combination Figures 1 to 3 As shown, according to an embodiment of the present application, a cylinder head assembly is provided.

[0029] like Figure 1 and Figure 2 As shown, the cylinder head assembly includes a cover body 10 and a lift limit assembly 20. The lift limit assembly 20 is detachably connected to the cover body 10, and the lift limit assembly 20 has a vibration reduction part, which is used to reduce the noise of the exhaust valve plate hitting the cover body 10.

[0030] In this embodiment, a detachable lift limit assembly 20 is provided on the cover body 10, and a vibration reduction part is provided on the lift limit assembly 20. Such a configuration can reduce the noise caused by the valve plate hitting the cover body, and effectively improves the practicality of the cylinder assembly.

[0031] The lift limit assembly 20 includes a limit column 21. The first end of the limit column 21 is detachably connected to the cover 10, the second end of the limit column 21 forms a stop end, and the vibration reduction part is connected to at least one end of the limit column 21, that is, the vibration reduction part can be only arranged on one end of the limit column 21 to achieve the effect of vibration reduction and noise reduction. This arrangement can prevent the exhaust valve sheet of the cylinder from directly hitting the cover, and can effectively reduce the noise generated by the cover assembly.

[0032] Preferably, the vibration reduction part includes a flexible material segment, and the flexible material segment is connected to at least one end of the limiting column 21. That is, the vibration reduction part can be made of a flexible material with wear reduction and noise reduction, and the vibration reduction part is arranged to be connected to the limiting column 21, which can improve the reliability of the limiting column 21. Preferably, the flexible material segment and at least one end of the limiting column 21 are integrally injection molded.

[0033] like Figure 3 As shown, an external thread is provided on the outer surface of the first end of the limiting column 21, so that the connection stability between the limiting column 21 and the cover body can be improved. In addition, in order to improve the reliability of the limiting column 21 in stopping the valve plate, the end surface of the second end of the limiting column 21 is set to a slope structure.

[0034] In this embodiment, the vibration reduction part includes a damping section 22. The damping section 22 is arranged in the cover body 10, and the first end of the limiting column 21 abuts against the damping section 22. Such an arrangement enables the damping section 22 to play a secondary vibration reduction role.

[0035] In another embodiment of the present application, the vibration reduction part includes a damping section 22. The damping section 22 is disposed in the cover body 10. The lift limit assembly 20 includes a limit column 21. The first end of the limit column 21 is detachably connected to the cover body 10 and abuts against the damping section 22, and the second end of the limit column 21 forms a stop end. That is, in the embodiment, the vibration reduction and noise reduction effect can be achieved without providing a flexible material on the limit column 21.

[0036] like Figure 1As shown, a counterbore 11 is provided on the cover body 10. An internal thread is provided on the inner circumference of the counterbore 11, and an external thread matching the internal thread is provided on the outer circumference of the first end of the limiting column 21. The length of the limiting column 21 extending into the counterbore 11 is adjustable to change the stroke of the valve plate moving to the second end of the limiting column 21. This arrangement enables the cylinder cover assembly to adapt to compressors of different models, effectively improving the practicality of the cylinder cover assembly.

[0037] Among them, the operation of the limit column 21 can form a plurality of strokes of different distances between the second end of the limit column 21 and the valve plate. When the operation of the limit column 21 changes from a previous stroke position to another stroke position, the distance that the limit column 21 extends into the counterbore 11 is an integer multiple of the pitch of the external thread. This arrangement can quickly adjust the limit column 21 to the position required to be formed by the valve plate of the corresponding model according to the model of the compressor. For example, when the end of the limit column 21 is provided with an inclined surface that cooperates with the valve plate, when the operation of the limit column 21 moves to a stroke corresponding to the valve plate, the inclined surface structure can always cooperate with the valve plate without the valve plate deviating from the inclined surface. When the valve plate is in the exhaust position, the valve plate has a certain inclination angle. After the inclined surface is set, the raised end of the valve plate can be placed on the inclined surface, which can prevent the valve plate from being excessively deformed and causing failure.

[0038] The cylinder head assembly in the above embodiment can also be used in the technical field of compressor equipment. That is, according to another aspect of the present invention, a compressor is provided, including a cylinder head assembly, and the cylinder head assembly is the cylinder head assembly in the above embodiment.

[0039] Specifically, the use of this cylinder head assembly effectively solves the problem that the lift height of the lift limit structure set on the cylinder head cannot be adjusted, and the cylinder head cannot adapt to the design requirements of different models, resulting in poor parts versatility. It also solves the problem that the exhaust valve plate directly hits the lift limit structure, and the impact noise is directly radiated through the cylinder head, causing the compressor noise to be relatively loud. It also solves the problem that the cylinder head and the lift limit structure are generally cast as one piece, usually made of metal material, and the impact noise with the valve plate is relatively large, which is not conducive to the low-noise design of the compressor.

[0040] The cylinder head assembly is a fully enclosed reciprocating compressor with an adjustable lift cylinder head structure. It adopts a simple and feasible structural form to achieve height adjustment of the cylinder head lift limit structure, achieve adjustability of the lift height, increase the universality and adaptability of the cylinder head parts, achieve universalization of parts, and help reduce investment in production costs and reduce the cost of the compressor. The cylinder head structure can reduce the valve plate impact noise by adding sound insulation or vibration isolation materials, reduce the vibration transmission of the direct impact of the valve plate, and play the effect of reducing impact vibration and impact noise. The cylinder head structure can reduce the impact vibration and noise of the valve plate by replacing the material of the lift limit structure and using shock-absorbing and vibration-absorbing materials.

[0041] The cylinder head and lift limit structure adopt a split structure, and the lift limit height of the cylinder head is adjusted by threaded connection and adjusting the height of the lift limit structure. A damping member for shock absorption and noise reduction is added between the cylinder head and the lift limit structure, and the vibration and noise transmission caused by the exhaust valve plate hitting the lift limit structure are reduced by the damping member, and the lift limit structure is tightened and locked by the reaction of the damping member.

[0042] The lift limit structure can use vibration-reducing and noise-reducing materials to directly reduce the vibration and noise of the exhaust valve plate hitting the lift limit structure, reduce the stress of the valve plate hitting, thereby increasing the service life of the valve plate and the service life of the compressor.

[0043] Currently, there are various structures of cylinder heads for fully enclosed reciprocating compressors on the market, among which the cylinder head structure with the lift limit structure set on the cylinder head has problems such as poor versatility, direct transmission of valve plate impact noise, high valve plate impact noise, and high valve plate impact stress. The cylinder head assembly structure of the present application is adopted to effectively solve the above existing problems and structural defects.

[0044] like Figure 1 As shown, the cylinder head assembly structural parts include a cylinder head, i.e., a cover body, a damping member, i.e., a damping section, and a lift limit structure, i.e., a limit column. The cylinder head and the lift limit structure are fastened and fixed by fastening threads. Through the design of the thread pitch of the cylinder head and the lift limit structure, the assembly height of the lift limit structure can be adjusted by an integer multiple of the pitch, thereby realizing the adjustment of the valve plate lift height. The adjustability of the lift is realized through the structural design, so that the cylinder head can adapt to the lift height requirements of different compressor models and different displacements, increase the versatility of parts, reduce the investment cost of the cylinder head mold, and thus reduce the production cost of the compressor. The damping member, i.e., the damping section, is assembled in the fastening threaded hole, and through the reaction effect of extrusion, it plays an effect of preventing the lift limit structure from loosening. At the same time, through the vibration isolation and vibration reduction characteristics of the damping member, the vibration and noise transmission caused by the exhaust valve plate hitting the lift limit structure are reduced. The cover body is provided with an exhaust channel, a threaded hole, a front countersunk hole, a screw hole, and a gas volume channel.

[0045] As attached Figure 2 As shown, a damping member is clamped in the cylinder head and the lift limit structure, and the damping member is assembled in the fastening threaded hole of the cylinder head. Through the threaded fastening and extrusion, the damping member has a certain elasticity to deform and adapt to different lift heights. At the same time, the reaction of the extrusion deformation prevents the lift limit structure from loosening. At the same time, the vibration isolation and vibration reduction characteristics of the damping member reduce the vibration and noise transmission caused by the exhaust valve plate hitting the lift limit structure, thereby achieving the effect of vibration reduction and noise reduction, making the compressor vibration noise lower and having a better matching effect with the refrigerator body.

[0046] The limit column is divided into a limit head and a limit tail. The limit tail in the lift limit structure is designed with a fastening thread. The limit head and the limit tail can be integrally formed with vibration-damping and noise-reducing materials, or the limit head and the limit tail can be separately formed. The limit head is formed with vibration-damping and noise-reducing materials, and the limit tail can be formed with metal materials. The lift limit structure made of vibration-damping and noise-reducing materials can effectively reduce the noise and vibration of the exhaust valve plate impact, thereby reducing the noise of the compressor and facilitating low-noise design. At the same time, the structure can effectively reduce the impact stress of the valve plate, improve the service life and reliability of the valve plate, and increase the service life of the compressor.

[0047] The fastening and adjustment of the limit post and the cylinder head are not limited to the threaded connection form, but may also include other connection methods, such as snap-on connection, interference fit, etc.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cylinder head assembly, characterized in that: include: Cover body (10); a lift limit assembly (20), the lift limit assembly (20) being detachably connected to the cover body (10), the lift limit assembly (20) comprising a vibration reduction portion, the vibration reduction portion being used to reduce the noise caused by the exhaust valve plate impacting the cover body (10); The vibration reduction part comprises a damping section (22), wherein the damping section (22) is arranged in the cover body (10), and the lift limit assembly (20) comprises: a limit column (21), wherein a first end of the limit column (21) is detachably connected to the cover body (10) and abuts against the damping section (22), and a second end of the limit column (21) forms a stop end; The cover body (10) is provided with a countersunk hole (11), the inner circumferential surface of the countersunk hole (11) is provided with an internal thread, the outer circumferential surface of the first end of the limiting column (21) is provided with an external thread matching the internal thread, and the length of the limiting column (21) extending into the countersunk hole (11) is adjustable to change the stroke of the valve plate moving to the second end of the limiting column (21).

2. The cylinder head assembly according to claim 1, characterized in that: The end surface of the second end of the limiting column (21) is in an inclined structure.

3. The cylinder head assembly according to claim 1, characterized in that: Operation of the limiting post (21) can form a plurality of strokes of different distances between the second end of the limiting post (21) and the valve plate; when the limiting post (21) is operated to change from a previous stroke position to another stroke position, the distance that the limiting post (21) extends into the counterbore (11) is an integer multiple of the pitch of the external thread.

4. A compressor, comprising a cylinder head assembly, characterized in that: The cylinder head assembly is the cylinder head assembly according to any one of claims 1 to 3.

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