CN111664073A

CN111664073A - Cylinder cover assembly for refrigerator compressor and refrigerator compressor

Info

Publication number: CN111664073A
Application number: CN202010542465.5A
Authority: CN
Inventors: 王俊杰; 徐廉洲; 曲馨; 常伟; 贾婷婷; 刁珂
Original assignee: Qingdao Wanbao Compressor Co ltd
Current assignee: Qingdao Wanbao Compressor Co ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2020-09-15

Abstract

The invention relates to a cylinder cover assembly for a refrigerator compressor and the refrigerator compressor, belonging to the technical field of compressors and comprising a cylinder cover, wherein the cylinder cover is provided with an oil baffle plate and a radiating fin; an exhaust cavity is arranged in the cylinder cover, and a limiting piece mounting base is arranged in the exhaust cavity; an installation platform is arranged on the upper surface of the limiting piece installation base; the exhaust cavity is also provided with a limiting piece contacted with the exhaust valve plate; one surface of the limiting part facing the exhaust cavity is provided with a positioning table; the positioning table and the limiting table are connected through an elastic piece. The cylinder cover disclosed by the invention has an oil blocking structure, is a part, has multiple purposes, can effectively prevent oil drops from being sucked by the silencer, reduces the circulation rate of a system, and avoids the problem that a box body is not refrigerated due to oil blockage. The oil blocking structure is arranged in the direction of the oil line throwing-out path, so that the oil line can be prevented from throwing to the inlet of the air suction silencer.

Description

Cylinder cover assembly for refrigerator compressor and refrigerator compressor

Technical Field

The utility model belongs to the technical field of the compressor, specifically relate to a cylinder head assembly and refrigerator compressor for refrigerator compressor.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

The cylinder cover is a key part of the refrigerator compressor, can realize the separation of high and low pressure cavities in the running process of the press and ensure the normal air suction and exhaust circulation of the press. The cylinder head exhaust cavity performs buffering and silencing functions in the exhaust system.

The inventor discovers that the existing compressor motion system is in the process of working, in order to realize stopping the oil line, prevent that the refrigerating machine oil that the bent axle was thrown away from being inhaled by the muffler, can realize through the mode of changing the cylinder block structure usually, different product platforms are not general, the comprehensive cost is high, and current discharge valve piece is installed in the valve plate recess, compress tightly the location through discharge valve reed and discharge valve limiting plate, the discharge valve piece lift is fixed, by the decision of limiting plate structure, the unable optimal lift height of selecting of different product platforms different discharge capacities, be unfavorable for compressor efficiency survey and optimize, and be equipped with strengthening rib and limiting plate compact structure in the discharge chamber of cylinder head, occupy the great volume in discharge chamber like this, influence exhaust efficiency.

Disclosure of Invention

To solve the technical problems in the prior art, the disclosure provides a cylinder head assembly for a refrigerator compressor and the refrigerator compressor.

At least one embodiment of the present disclosure discloses a cylinder cover assembly for a refrigerator compressor, comprising a cylinder cover, wherein the cylinder cover is connected with an oil baffle plate; an exhaust cavity is arranged in the cylinder cover, and a limiting piece mounting base is arranged in the exhaust cavity; an installation platform is arranged on the upper surface of the limiting piece installation base; the exhaust cavity is also provided with a limiting piece contacted with the exhaust valve plate; one surface of the limiting part facing the exhaust cavity is provided with a positioning table; the positioning table and the limiting table are connected through an elastic piece.

Further, the oil baffle plate and the cylinder cover are integrally formed in a die-casting mode; and the outer surfaces of the oil baffle plate and the cylinder cover are provided with radiating fins.

Furthermore, the limiting part is a limiting block with an upper surface and a lower surface both bending downwards, and the upper surface of the limiting block is in contact with the exhaust valve plate.

Further, the upper surface of the limiting block is the same as the surface profile of the exhaust valve plate.

Furthermore, the thickness of the contact surface of the limiting block and the exhaust valve plate is more than or equal to 2mm, and the edge of the contact surface is provided with a fillet.

Furthermore, a polymer coating process is used for one surface of the limiting part, which is in contact with the exhaust valve plate.

Further, the mounting base is disposed on a bottom surface of the exhaust chamber.

Further, the entire profile of the mounting base is the same as the profile of the stop.

Furthermore, the positioning table and the mounting table are both provided with cylindrical surfaces; the positioning table is connected with the cylindrical table through a spring or a damper; and the spring or the damper is in interference fit with the positioning table and the cylindrical table respectively.

At least one embodiment of the present disclosure also discloses a refrigerator compressor, which includes any one of the above mentioned cylinder head assemblies for a refrigerator compressor.

The embodiment disclosed above achieves the following advantages:

(1) the cylinder cover is provided with the oil blocking structure, so that oil drops can be prevented from being sucked by the silencer, the oil circulation rate of the system is reduced, and the problem that the box body is not refrigerated due to oil blockage is avoided. The cylinder cover is universal for different product platforms, and the mode of changing the cylinder seat is reduced, so that the increase of the comprehensive cost caused by the increase of the number of the overall parts and the weight is reduced.

(2) The exhaust cavity in the cylinder cover of the utility model cancels the reinforcing ribs and the limiting plate compression structure, increases the volume of the exhaust cavity, improves the exhaust efficiency and reduces the exhaust temperature.

(3) The utility model discloses a be connected with the stopper that the discharge valve piece contacted on the cylinder head exhaust chamber base, compare simple structure with traditional limiting plate, workable, cooperation size is more accurate. Meanwhile, the exhaust valve plate limiting plate and the exhaust valve reed of the traditional structure can be eliminated, the number of parts and the installation process are reduced, and the purposes of saving manpower and reducing cost can be achieved.

(4) The locating part in the cylinder cover is connected with the installation base through the elastic part, and under the action of the elastic part, products with different platforms and different discharge capacities can automatically select and use the optimal lift scheme matched with the gas thrust of the exhaust valve plate, so that the accurate effect improvement of the valve group is realized.

(5) The profile of the contact surface of the limiting block and the exhaust valve plate is consistent with that of the valve tongue of the exhaust valve plate, and the contact surface has a certain radian, so that the impact stress of the valve plate can be effectively relieved when the contact surface is flapped with the valve plate, and the service life of the valve plate is prolonged.

(6) The surface of the limiting part, which is in contact with the exhaust valve plate, is coated with a polymer coating process (such as graphene and molybdenum disulfide), or embedded with a PPEK material, or directly processed by a polymer material such as PEEK and the like, so that the slapping noise of the exhaust valve plate and the limiting plate is reduced, the valve group is denoised, and the sound quality of the compressor is improved.

(7) The whole profile of the installation base is the same as that of the limiting part, and the profiling design is adopted, so that the accurate positioning of the limiting device in the process of tool installation is facilitated.

(8) This open setting is at the spring or the attenuator between installation base and locating part, respectively in location platform and mount table interference fit, guarantees joint strength, and makes the locating part installation fix at the cylinder head inner chamber.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.

Fig. 1 is a schematic structural diagram of a compressor system of a refrigerator disclosed in the prior art;

FIG. 2 is a block diagram of a cylinder block of the prior art;

FIG. 3 is a schematic view of a mounting structure of an exhaust valve plate disclosed in the prior art;

fig. 4 is a schematic view illustrating an installation structure of a cylinder head assembly for a compressor of a refrigerator according to an embodiment of the present disclosure;

fig. 5 is a schematic structural view of a cylinder head assembly for a compressor of a refrigerator according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a cylinder head structure for a refrigerator compressor according to an embodiment of the disclosure;

fig. 7 is a front view of a limiting member according to an embodiment of the disclosure;

fig. 8 is an axial view of a limiter according to an embodiment of the disclosure.

In the figure, the cylinder cover 1, the cylinder cover 2, the oil baffle 3, the radiating fins 4, the exhaust cavity 5, the mounting base 51, the mounting table 6, the limiting member 61, the limiting block 62, the positioning table 7 and the spring.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

In the description of the present disclosure, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present disclosure.

As shown in fig. 1, in a compressor system of a refrigerator, a cylinder head is usually mounted on a cylinder block, a rotating crankshaft is arranged behind the cylinder head, during the operation of the compressor, in order to ensure lubrication and cooling of moving parts, an eccentric part of the crankshaft throws out refrigerating machine oil, and part of the oil directly enters an inlet of an air suction muffler, so that the circulation rate of the system is reduced. And as shown in figure 3, the exhaust valve plate in the existing cylinder is installed on the valve plate, a special valve plate groove is formed in the valve plate and used for placing the exhaust valve plate, the exhaust valve plate is placed at the bottom end of the valve plate groove, and an exhaust valve reed and an exhaust valve limiting plate are sequentially arranged on the exhaust valve plate, so that the installation efficiency is not high, the number of parts is large, the comprehensive cost is high, and meanwhile, a reinforcing rib and a limiting plate pressing structure are required to be arranged in an exhaust cavity of the existing cylinder cover, and the exhaust cavity is also occupied with large volume.

The cylinder cover assembly for the refrigerator compressor disclosed by the embodiment of the disclosure is shown in fig. 4-5, and mainly comprises a cylinder cover 1 and an oil baffle plate 2, wherein the oil baffle plate is a rectangular plate or can be in other shapes according to the space of the compressor and the structure of a cylinder seat or a cylinder cover, the oil baffle plate is arranged above an inlet of a silencer, the oil baffle plate and the cylinder cover are integrally formed by die casting, an included angle between the oil baffle plate of the cylinder cover and an exhaust cavity part of the cylinder cover is adjustable, the adjustment can be carried out according to the structure of the cylinder seat of different product platforms, and meanwhile, radiating fins 3 are arranged on the outer surfaces of the cylinder cover and the oil baffle plate in an array manner, so that the heat dissipation of the cylinder head part can be improved, the root parts of the. The size, the distance and the root height of the radiating fins can be adjusted according to different product platforms and shell spaces of different machine types.

Further, as shown in fig. 6, an exhaust cavity 4 is provided in the cylinder head disclosed in this embodiment, a corresponding reinforcing rib or a pressing structure of a limiting plate is not required to be provided in the exhaust cavity, but an installation base 5 is provided in the exhaust cavity, an installation table 21 is provided on the installation base, a limiting member 6 contacting with the exhaust valve plate is provided at the top of the installation base, and the limiting member is connected with the installation base through a lift adaptive structure, so that the limiting member can move up and down relative to the installation base. Like this through the motion realization exhaust valve piece of locating part closure, compare in the driven cylinder head in fig. 2, the cylinder head disclosed of this embodiment is inside to have cancelled strengthening rib and traditional limiting plate compact structure, has increased the exhaust chamber volume, has improved exhaust efficiency, has reduced exhaust temperature.

Further, the mounting base 2 may be welded to the bottom of the exhaust cavity, and in other embodiments, the mounting base may be integrally formed with the cylinder head, but the contour of the mounting base is identical to that of the position-limiting member, so that a profiling design is adopted to help ensure accurate positioning of the position-limiting member when the position-limiting member is mounted by using a tool, and only the position-limiting member needs to be aligned with the outer contour of the mounting base.

As shown in fig. 7, the limiting member in the embodiment of the present disclosure mainly includes an arc block 61 contacting with the exhaust valve plate and a positioning table 62 disposed on the arc block, where the positioning table 62 is disposed on a side surface of the arc plate facing the exhaust cavity, and the positioning table 62 corresponds to a position of an installation table on the installation base.

The upper surface and the lower surface of the arc-shaped block are bent downwards and have certain radians, and the surface of the arc-shaped block, which is in contact with the exhaust valve plate, has the contour identical to that of the upper surface and the valve tongue of the exhaust valve plate, so that the impact stress of the exhaust valve plate can be effectively relieved when the exhaust valve plate is flapped by the limiting block, and the service life of the exhaust valve plate is prolonged.

In order to ensure the strength of a contact surface of the limiting piece and the exhaust valve plate, the thickness of the contact surface is more than or equal to 2 mm; in order to prolong the service life of the exhaust valve plate, the edge of the contact surface is designed with a fillet, so that the exhaust valve plate can be prevented from accelerating failure due to the increase of impact stress of the exhaust valve plate caused by stress concentration.

Further, as shown in fig. 8, a polymer coating process (such as graphene, molybdenum disulfide, etc.) can be used on the surface of the arc-shaped block on the limiting member, which is in contact with the exhaust valve plate, or a PPEK material is embedded in the surface of the arc-shaped block, or the arc-shaped block is directly processed by using a polymer material such as PEEK, so that the slapping noise of the exhaust valve plate and the arc-shaped block is reduced, the noise reduction of the valve group is realized, and the sound quality.

It is naturally easy to think that the surface corresponding to the exhaust valve plate can also use the polymer coating process, that is, the surface of the exhaust valve plate contacting with the arc block uses the polymer coating process, thus the noise reduction function of the valve group is improved.

Further, above-mentioned locating part can be through die-casting integrated into one piece in this embodiment, simple structure, and high with the imitative face degree of agreeing with of exhaust valve piece, compare in the limit structure of traditional exhaust valve piece, can replace traditional exhaust valve piece limiting plate and exhaust valve reed through this implementation setting locating part in the exhaust cavity, reduced the quantity and the installation procedure of part.

Because the exhaust valve plates of different platforms and different displacement products are subjected to different gas thrusts, the lift of the rebound valve plate is fixed, the optimal lift height cannot be selected, and the efficiency measurement and optimization of the compressor are not facilitated. The lift of the existing exhaust valve plate is fixed, as shown in fig. 3, which is determined by a limiting plate structure, different product platforms cannot select the optimal lift height with different displacements, which is not beneficial to the optimization of the efficiency of the compressor, so that a self-adaptive structure of the lift of the exhaust valve plate is arranged between a limiting piece and an installation base in the cylinder cover disclosed by the embodiment, specifically, as shown in fig. 4, a spring 7 is arranged between the limiting piece and the installation base, two ends of the spring are respectively sleeved on a positioning table on the limiting piece and an installation table on the installation base and are in interference fit, thus ensuring the connection strength between the limiting piece and the installation base, and realizing that the limiting piece is installed in an exhaust cavity, so that when the limiting piece is subjected to impact forces with different sizes, products with different platforms and different displacements can automatically select the optimal lift scheme matched, the valve bank is accurate and efficient.

In other embodiments, the limiting plate and the mounting base can be connected through a damper.

Besides, the embodiment of the disclosure also discloses a refrigerator compressor, which comprises the cylinder head assembly for the refrigerator compressor.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. A cylinder cover assembly for a refrigerator compressor comprises a cylinder cover and is characterized in that an oil baffle plate is connected to the cylinder cover; an exhaust cavity is arranged in the cylinder cover, and a limiting piece mounting base is arranged in the exhaust cavity; an installation platform is arranged on the upper surface of the limiting piece installation base; the exhaust cavity is also provided with a limiting piece contacted with the exhaust valve plate; one surface of the limiting part facing the exhaust cavity is provided with a positioning table; the positioning table and the limiting table are connected through an elastic piece.

2. The cylinder head assembly for a compressor of a refrigerator as claimed in claim 1, wherein the oil deflector is integrally die-cast with the cylinder head; and the outer surfaces of the oil baffle plate and the cylinder cover are provided with radiating fins.

3. The cylinder head assembly for a compressor of a refrigerator as claimed in claim 1, wherein the stopper is a stopper having upper and lower surfaces bent downward, and the upper surface of the stopper is in contact with the discharge valve sheet.

4. A cylinder head assembly for a compressor of a refrigerator as claimed in claim 3, wherein an upper surface of the stopper has the same contour as a surface of the discharge valve sheet.

5. The cylinder head assembly for the compressor of the refrigerator as claimed in claim 3, wherein the thickness of the contact surface of the stopper and the discharge valve sheet is greater than or equal to 2mm, and the edge of the contact surface is provided with a rounded corner.

6. The cylinder head assembly of claim 1, wherein a surface of the retainer contacting the discharge valve plate is coated with a polymer.

7. A cylinder head assembly for a compressor of a refrigerator as claimed in claim 1, wherein the mounting base is provided on a bottom surface of the discharge chamber.

8. The cylinder head assembly for a compressor of a refrigerator as claimed in claim 7, wherein the entire contour of the mounting base is identical to the contour of the retainer.

9. A cylinder head assembly for a compressor of a refrigerator as claimed in claim 1, wherein the positioning table and the mounting table are provided with cylindrical surfaces; the positioning table is connected with the cylindrical table through a spring or a damper; and the spring or the damper is in interference fit with the positioning table and the cylindrical table respectively.

10. A compressor for a refrigerator, comprising the cylinder head assembly for a compressor for a refrigerator according to any one of claims 1 to 9.