CN211370676U

CN211370676U - Exhaust structure of compressor and compressor

Info

Publication number: CN211370676U
Application number: CN201921924389.3U
Authority: CN
Inventors: 陈艳春; 沈孟奇; 程剑波
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-08-28
Anticipated expiration: 2029-11-06

Abstract

The application provides a discharge structure and compressor of compressor, wherein, the discharge structure of compressor includes: the cylinder and an upper cylinder cover arranged on the end face of the cylinder; an exhaust oblique notch is formed in the side wall of the cylinder, and the projection area of the exhaust oblique notch on the end face of the cylinder is S1; the upper cylinder cover is provided with an exhaust hole, the exhaust hole is communicated with the exhaust inclined notch, and the projection area of the exhaust hole on the end face of the cylinder is S2; wherein the ratio of S1 and S2 satisfies the relationship: S1/S2 is less than or equal to 1/2. In the exhaust structure of the compressor and the compressor provided by the application, the ratio of the projection area of the exhaust oblique notch on the cylinder end surface to the projection area of the exhaust hole on the cylinder end surface is set to be below 1/2, so that the exhaust resistance of the compressor is reduced while the clearance volume is ensured to be small, and the energy efficiency level of the compressor is effectively improved.

Description

Exhaust structure of compressor and compressor

Technical Field

The application relates to the technical field of compressors, in particular to an exhaust structure of a compressor and the compressor.

Background

Along with the improvement of environmental awareness, the energy efficiency requirement of people on refrigeration equipment is continuously improved, and the performance requirement on a compressor is higher and higher. In the efficient design of the compressor, the exhaust clearance volume is effectively controlled, the volumetric efficiency of the compressor can be obviously improved, and the overall energy efficiency of the compressor is improved. For this reason, existing compressors reduce the exhaust clearance volume as much as possible in pursuit of volumetric efficiency, so that the exhaust chamfer (also referred to as DV port) is generally small.

At present, research on the exhaust inclined notch focuses on improving the volumetric efficiency of the cylinder and reducing the clearance volume, and therefore the smaller the exhaust inclined notch is, the better the exhaust inclined notch is. However, a smaller exhaust chamfer results in increased exhaust resistance, making cylinder exhaust unsmooth.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims to provide an exhaust structure and compressor of compressor has overcome prior art's difficulty, can reduce the exhaust resistance of compressor, promotes the efficiency of compressor effectively.

According to an aspect of the present invention, there is provided an exhaust structure of a compressor, the exhaust structure of the compressor including: the cylinder and an upper cylinder cover arranged on the end face of the cylinder;

an exhaust oblique notch is formed in the side wall of the cylinder, and the projection area of the exhaust oblique notch on the end face of the cylinder is S1;

the upper cylinder cover is provided with an exhaust hole, the exhaust hole is communicated with the exhaust inclined notch, and the projection area of the exhaust hole on the end face of the cylinder is S2;

wherein the ratio of S1 and S2 satisfies the relationship: S1/S2 is less than or equal to 1/2.

Optionally, in the exhaust structure of the compressor, the cylinder has an inner cavity, and the exhaust oblique notch is communicated with the inner cavity.

Optionally, in the exhaust structure of the compressor, the inner cavity is disposed along an axial direction of the cylinder.

Optionally, in the discharge structure of the compressor, the discharge hole is circular, elliptical or polygonal.

According to another aspect of the present invention, there is provided a compressor including the exhaust structure of the compressor as described above.

Optionally, in the compressor, the compressor is a rolling rotor compressor.

The utility model provides an among the exhaust structure and the compressor of compressor, through with the ratio of exhaust scarf at the projection area of cylinder end face and exhaust hole at the projection area of cylinder end face is set below 1/2, from this when guaranteeing that the clearance volume is less, reduces the exhaust resistance of compressor, promotes the efficiency level of compressor effectively.

Drawings

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments so that the features and advantages of the present invention will be more apparent.

Fig. 1 is a plan view of a discharge structure of a compressor according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the vent hole area of FIG. 1;

fig. 3 is a relational graph showing that the coefficient of performance of the compressor varies with the ratio of the projection area of the exhaust diagonal cut on the cylinder end surface to the projection area of the exhaust hole on the cylinder end surface.

Detailed Description

Detailed descriptions will be given below of embodiments of the present invention. Although the invention will be described and illustrated in connection with certain specific embodiments, it should be understood that the invention is not limited to these embodiments. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and components have not been described in detail so as not to obscure the present invention.

Please refer to fig. 1 and fig. 2, which are schematic structural diagrams of a discharge structure of a compressor according to an embodiment of the present invention. As shown in fig. 1 and 2, the discharge structure 10 of the compressor includes: a cylinder and an upper cylinder cover (the reference number is not shown in the figure) arranged on the end face of the cylinder; an exhaust inclined cut (reference number is not shown in the figure) is arranged on the side wall of the cylinder, and the projection area of the exhaust inclined cut on the end face of the cylinder is S1; an exhaust hole 11 is formed in the upper cylinder cover, the exhaust hole 11 is communicated with the exhaust inclined notch, and the projection area of the exhaust hole 11 on the end face of the cylinder is S2; wherein the ratio of S1 and S2 satisfies the relationship: S1/S2 is less than or equal to 1/2.

Specifically, the cylinder has an inner cavity disposed axially therealong, the inner cavity being generally cylindrical. An exhaust inclined cut (also called DV cut) communicated with the inner cavity is arranged on the side wall of the cylinder and is matched with the exhaust hole 11 to serve as an exhaust guide structure.

The upper cylinder cover is arranged at the upper end of the cylinder and is in contact with the end face of the cylinder. An exhaust hole 11 is formed in the upper cylinder cover, and the exhaust hole 11 is communicated with the exhaust inclined notch.

In this embodiment, the exhaust hole 11 is circular. In other embodiments, the exhaust holes 11 may have other shapes such as an oval shape, a polygonal shape, and the like.

In this embodiment, the exhaust hole 11 completely covers the oblique exhaust port, i.e. the projection of the oblique exhaust port on the cylinder end face is located inside the projection of the exhaust hole 11 on the cylinder end face.

As shown in fig. 2, the projection of the exhaust port 11 on the cylinder end surface is a circle, the projected area is S2, the projection of the exhaust chamfer on the cylinder end surface is a meniscus, the meniscus projection is defined by a dotted line in the circle and a circle edge line connected with the dotted line, which is a part of the circle projection, the projected area is S1, and the ratio of S1 and S2 satisfies the relationship: S1/S2 is less than or equal to 1/2.

The inventor researches and discovers that when the compressor discharges air, the refrigerant in the inner cavity is guided by the inclined exhaust port and discharged from the corresponding exhaust hole 11, and in the process, the inclined exhaust port shields the exhaust hole 11, so that the exhaust resistance is increased. In order to reduce the exhaust resistance, the inventor controls the ratio (S1/S2) of the projected area S1 of the exhaust diagonal cut on the cylinder end surface to the projected area S2 of the exhaust hole 11 on the cylinder end surface so as to reduce the obstruction of the exhaust diagonal cut on the exhaust hole 11.

Experimental research shows that when the ratio (S1/S2) of the projection area S1 of the oblique exhaust notch on the cylinder end surface to the projection area S2 of the exhaust hole 11 on the cylinder end surface is 1/2 or less, the oblique exhaust notch is more beneficial to exhaust and can further improve the energy efficiency of the compressor.

By adopting the exhaust structure 10 of the compressor provided by the embodiment, the compressor with certain specification is improved, and the conditions of the capacity and the energy efficiency before and after the improvement are as follows:

	compressor before improvement	Improved compressor
			Capability of	4905	4897
Energy efficiency	3.98	4.02

It can be seen from the above table that the compressor after improving, owing to adopt the utility model provides an exhaust structure 10 of compressor compares the compressor of current same specification (the compressor before improving promptly), and the ability (the refrigerating output) is unchangeable basically, and the efficiency is improved to 4.02 by 3.98, has risen 1%.

Accordingly, the present embodiment also provides a compressor including the discharge structure 10 of the compressor as described above. Please refer to the above, which is not described herein.

In the compressor provided by the embodiment, the ratio (S1/S2) of the projection area S1 of the exhaust inclined notch on the cylinder end surface to the projection area S2 of the exhaust hole 11 on the cylinder end surface is 1/2 or less. In the existing compressor, the projection area of the exhaust oblique notch on the cylinder end face is substantially half or more of the projection area of the exhaust hole on the cylinder end face. Compared with the existing compressor, the compressor provided by the embodiment has the advantages that the ratio (S1/S2) of the projection area S1 of the exhaust oblique notch on the cylinder end surface to the projection area S2 of the exhaust hole 11 on the cylinder end surface is smaller, so that the exhaust is smoother.

In this embodiment, the exhaust hole 11 is designed in the prior art, i.e., the projected area S2 on the cylinder end surface is kept constant, while the exhaust chamfer is designed in the new way, i.e., the projected area S1 on the cylinder end surface is relatively smaller than that of the prior art.

In other embodiments, the projection area S1 of the exhaust chamfered opening on the cylinder end surface is kept constant, while the projection area S2 of the exhaust hole 11 on the cylinder end surface is increased, or the projection area S2 of the exhaust hole 11 on the cylinder end surface and the projection area S1 of the exhaust chamfered opening on the cylinder end surface are both changed, as long as the ratio (S1/S2) of the projection area S1 of the exhaust chamfered opening on the cylinder end surface to the projection area S2 of the exhaust hole 11 on the cylinder end surface is ensured to be below 1/2.

Please refer to fig. 3, which is a graph showing the relationship between the coefficient of performance of the compressor according to the embodiment of the present invention and the ratio of the projection area of the exhaust chamfer on the cylinder end surface to the projection area of the exhaust hole on the cylinder end surface. As shown in FIG. 3, the horizontal axis is the ratio of the projection area of the exhaust chamfer on the cylinder end surface to the projection area of the exhaust hole on the cylinder end surface (S1/S2), the vertical axis is the coefficient of performance COP of the compressor, and the COP is reduced along with the increase of S1/S2 by taking S1/S2 as a parameter and changing the parameter, and when S1/S2 is less than or equal to 1/2, the COP is in a more preferable range.

In this embodiment, the compressor is a rolling rotor compressor, and the rolling rotor compressor is suitable for the refrigeration fields of air conditioners, refrigerators and the like.

In summary, the utility model discloses an exhaust structure and compressor of compressor, through with the ratio of the projection area of exhaust chamfer mouth at the cylinder terminal surface and the projection area of exhaust hole at the cylinder terminal surface is set for below 1/2, from this when guaranteeing that the clearance volume is less, can reduce the exhaust resistance of compressor, promotes the energy efficiency level of compressor effectively.

The foregoing is a more detailed description of the present application in connection with specific preferred embodiments and it is not intended that the present application be limited to these specific details. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims

1. A discharge structure of a compressor, comprising: the cylinder and an upper cylinder cover arranged on the end face of the cylinder;

2. The discharge structure of a compressor as claimed in claim 1, wherein said cylinder has an inner cavity, said discharge chamfer communicating with said inner cavity.

3. A discharge structure of a compressor as set forth in claim 2, wherein said inner chamber is disposed along an axial direction of said cylinder.

4. The discharge structure of a compressor as claimed in claim 1, wherein the discharge hole is circular, elliptical or polygonal.

5. A compressor, comprising: the discharge structure of a compressor according to any one of claims 1 to 4.

6. The compressor of claim 5, wherein the compressor is a rolling rotor compressor.