CN112943618B

CN112943618B - Exhaust structure and compressor

Info

Publication number: CN112943618B
Application number: CN202110189728.3A
Authority: CN
Inventors: 阙沛祯; 周瑜; 聂军; 崔雪梅; 刘聪
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2021-02-19
Filing date: 2021-02-19
Publication date: 2023-03-10
Anticipated expiration: 2041-02-19
Also published as: CN112943618A

Abstract

The invention provides an exhaust structure and a compressor. The exhaust structure includes: the cylinder is provided with a cylinder exhaust cavity and a crescent groove communicated with the cylinder exhaust cavity; the bearing is provided with a bearing exhaust hole, and a first inlet of the bearing exhaust hole is communicated with the crescent groove; the valve plate is connected with the bearing and is provided with a mounting position which is covered on the first outlet of the bearing exhaust hole; the bearing exhaust hole comprises an exhaust hole body, and the central line of the exhaust hole body is obliquely arranged with the valve plate at the mounting position; the hole wall of the exhaust hole body is provided with a flow guide concave part. The exhaust structure of the invention solves the problem that the exhaust resistance of the exhaust structure of the compressor in the prior art is larger.

Description

Exhaust structure and compressor

Technical Field

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

Background

With the increasing of the displacement of the rotor compressor, the number and the size of the pump body exhaust holes are increased, but the increase of the number and the size of the pump body exhaust holes is limited by the reliability of the compressor structure and the valve plate baffle component of the compressor. When the displacement is increased, the total sectional area of the exhaust hole cannot be matched with the displacement. Therefore, the performance of the large-displacement compressor is limited by the number and the size of the exhaust holes of the pump body, and the exhaust resistance is obviously increased along with the continuous increase of the displacement, so that the performance of the compressor is seriously attenuated along with the increase of the frequency.

The shape of the bearing exhaust hole 21 of the bearing 20 in the prior art is mostly shown in fig. 1, and in the pump body exhaust process, high-pressure exhaust is influenced by the structure of the exhaust hole when passing through a cylinder exhaust cavity and the bearing exhaust hole, and the exhaust circulation path is changed for many times, so that the flow resistance is increased.

In order to solve the above problems, the prior art proposes to form a slope structure on the sidewall of the bearing exhaust hole to enable high-pressure gas to be exhausted in a smooth manner, so as to reduce high-pressure exhaust resistance. The prior art also provides that a flow guide part is arranged on the side wall of the bearing exhaust hole (the air outlet end of the inclined notch close to the crescent groove of the cylinder on one side), so that when air is exhausted through the flow guide part, the exhaust resistance and the overpressure loss can be reduced, the pneumatic noise of the compressor can be reduced, and the indicating efficiency and the energy efficiency of the compressor are improved.

However, the above structures all propose a slope exhaust structure from the perspective of dredging exhaust, but the arrangement of the slope structure makes the sectional area of the exhaust outlet larger, in order to ensure the exhaust sealing property, the head of the corresponding exhaust valve plate needs to be enlarged, the head of the exhaust valve plate has large mass, the valve closing response of the valve plate is poor, the valve plate closing delay brings about that the gas refrigerant flows back to the suction cavity from the exhaust hole, the suction capacity of the compressor is affected, and further the efficiency of the compressor is reduced.

Disclosure of Invention

The invention mainly aims to provide an exhaust structure and a compressor, and aims to solve the problem that the exhaust resistance of the exhaust structure of the compressor in the prior art is large.

In order to achieve the above object, according to one aspect of the present invention, there is provided a gas discharge structure including: the cylinder is provided with a cylinder exhaust cavity and a crescent groove communicated with the cylinder exhaust cavity; the bearing is provided with a bearing exhaust hole, and a first inlet of the bearing exhaust hole is communicated with the crescent groove; the valve plate is connected with the bearing and is provided with a mounting position which is covered on the first outlet of the bearing exhaust hole; the bearing exhaust hole comprises an exhaust hole body, and the central line of the exhaust hole body is obliquely arranged with the valve plate at the mounting position; the hole wall of the exhaust hole body is provided with a flow guide concave part.

Further, the inlet of the exhaust hole body is a first inlet; the first outlet is positioned on a first preset surface of the bearing, and the outlet of the exhaust hole body is positioned on the first preset surface; one end of the diversion concave part, which is far away from the inlet of the exhaust hole body, extends to a first preset surface, and one end of the diversion concave part, which is far away from the inlet of the exhaust hole body, and the outlet of the exhaust hole body form a first outlet together.

Further, the water conservancy diversion depressed part is a plurality of, and a plurality of water conservancy diversion depressed parts set gradually along the circumference of exhaust hole body.

Furthermore, the water conservancy diversion depressed part is two, and two water conservancy diversion depressed parts set up relatively.

Further, the first inlet is an elliptical opening, and the first outlet is a circular opening.

Furthermore, a first included angle between the central line of the exhaust hole body and the valve plate at the mounting position is theta; wherein 0 DEG < theta < 90 deg.

Further, the value range of the first included angle theta is more than 40 degrees and less than 70 degrees.

Furthermore, the flow guide concave part forms a flow guide inclined plane on the hole wall of the exhaust hole body; a second included angle beta is formed between the flow guide inclined plane and the axial direction of the bearing; wherein the content of the first and second substances,

further, the air conditioner is provided with a fan,

according to another aspect of the present invention, there is provided a compressor comprising a discharge structure, wherein the discharge structure is the discharge structure described above.

The exhaust structure is applied to the compressor and comprises an air cylinder, a bearing and a valve plate, when the compressor works, high-pressure exhaust firstly passes through an air cylinder exhaust cavity of the air cylinder, then enters a bearing exhaust hole communicated with the air cylinder exhaust cavity from the air cylinder exhaust cavity through a crescent groove on the air cylinder, and finally is exhausted through a space between the opened valve plate and a first outlet of the bearing exhaust hole. The bearing exhaust hole of the exhaust structure comprises an exhaust hole body, wherein the central line of the exhaust hole body is obliquely arranged with the valve plate at the mounting position; and the hole wall of the exhaust hole body is provided with a flow guide sunken part, therefore, after high-pressure exhaust enters the bearing exhaust hole, part of high-pressure exhaust passes through the flow guide surface of the flow guide sunken part, part of high-pressure exhaust flows out along the hole wall of the exhaust hole body, and part of high-pressure exhaust directly flows out through the bearing exhaust hole, namely, the high-pressure exhaust coming out from the first outlet flows out from three directions respectively, so that the exhaust resistance brought by congestion when flowing out from one direction and the large-flow overlarge impact force on the local part of the valve block are avoided, the problem of large exhaust resistance of an exhaust structure is solved, the indication efficiency of the compressor is improved, the power consumption is reduced, the high-frequency performance of the compressor is improved, and the energy efficiency attenuation is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a bearing in the background art;

FIG. 2 shows a cross-sectional view of an embodiment of a vent structure according to the present invention;

FIG. 3 shows a top view of an embodiment of a vent structure according to the invention;

FIG. 4 shows a partial enlarged view of the exhaust structure of FIG. 3 at A;

FIG. 5 showsbase:Sub>A cross-sectional view at section A-A of the exhaust structure of FIG. 3;

FIG. 6 shows a cross-sectional view at section B-B of the exhaust structure of FIG. 3;

FIG. 7a shows a top view of a second embodiment of a vent structure according to the invention;

FIG. 7b showsbase:Sub>A cross-sectional view at section A-A ofbase:Sub>A second embodiment ofbase:Sub>A vent structure according to the invention;

FIG. 7c shows a cross-sectional view at section B-B of a second embodiment of a vent structure according to the invention;

FIG. 8a shows a top view of a third embodiment of a vent structure according to the invention;

FIG. 8b showsbase:Sub>A cross-sectional view at section A-A ofbase:Sub>A third embodiment ofbase:Sub>A vent structure according to the invention;

FIG. 8c shows a cross-sectional view at section B-B of a third embodiment of an exhaust structure according to the invention;

fig. 9a shows a top view of a vent structure according to the present invention at (90- β)/θ = 1;

fig. 9b showsbase:Sub>A cross-sectional view atbase:Sub>A-base:Sub>A section at (90- β)/θ =1 ofbase:Sub>A gas exhaust structure according to the invention;

fig. 9c shows a cross-sectional view of a gas discharge structure according to the present invention at a section B-B at (90- β)/θ = 1;

fig. 10a shows a top view of a venting structure according to the invention at (90- β)/θ = 1.5;

fig. 10b showsbase:Sub>A cross-sectional view of an exhaust structure according to the present invention atbase:Sub>A-base:Sub>A section at (90- β)/θ = 1.5;

fig. 10c shows a cross-sectional view of a vent structure according to the present invention at a B-B section at (90- β)/θ = 1.5;

FIG. 11a shows a top view of a first embodiment of a vent structure according to the invention;

FIG. 11b showsbase:Sub>A cross-sectional view at section A-A of the first embodiment of the vent structure according to the present invention;

FIG. 11c shows a cross-sectional view at section B-B of the first embodiment of the exhaust structure according to the present invention;

FIG. 12 is a graph showing exhaust resistance loss and indicating efficiency variation trend with theta angle for the vent body of the venting structure according to the present invention;

fig. 13 shows a graph of exhaust resistance loss and indicated efficiency variation trends obtained from simulations in which the value of (90- β)/θ is from 0 to 1, when θ is 60 ° in the exhaust structure according to the present invention.

Wherein the figures include the following reference numerals:

10. a cylinder; 11. a cylinder exhaust chamber; 12. a crescent groove; 20. a bearing; 21. a bearing exhaust hole; 22. a vent body; 23. a flow guide recessed portion; 231. a flow guide inclined plane; 30. a valve plate; 40. and a baffle plate.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The present invention provides an exhaust structure, please refer to fig. 2 to 13, including: the cylinder 10 is provided with a cylinder exhaust cavity 11 and a crescent groove 12 communicated with the cylinder exhaust cavity 11; the bearing 20, the bearing 20 has bearing exhaust holes 21, the first inlet of the bearing exhaust hole 21 communicates with the crescent groove 12; the valve plate 30 is connected with the bearing 20, and the valve plate 30 is provided with a mounting position covered on the first outlet of the bearing exhaust hole 21; the bearing exhaust hole 21 comprises an exhaust hole body 22, and the central line of the exhaust hole body 22 is obliquely arranged with the valve plate 30 at the installation position; the hole wall of the exhaust hole body 22 is provided with a flow guide concave part 23.

The exhaust structure is applied to a compressor, the exhaust structure comprises an air cylinder 10, a bearing 20 and a valve plate 30, when the compressor works, high-pressure exhaust firstly passes through an air cylinder exhaust cavity 11 of the air cylinder 10, then enters a bearing exhaust hole 21 communicated with the air cylinder exhaust cavity 11 from the air cylinder exhaust cavity 11 through a crescent 12 on the air cylinder, and finally is exhausted through a space between the opened valve plate 30 and a first outlet of the bearing exhaust hole 21. The bearing exhaust hole 21 of the exhaust structure comprises an exhaust hole body 22, and the central line of the exhaust hole body 22 is obliquely arranged with the valve plate 30 at the installation position; and the hole wall of the exhaust hole body 22 is provided with the flow guide concave part 23, therefore, after high-pressure exhaust enters the bearing exhaust hole 21, part of the high-pressure exhaust passes through the flow guide surface of the flow guide concave part 23, part of the high-pressure exhaust flows out along the hole wall of the exhaust hole body 22, and the other part of the high-pressure exhaust directly flows out through the bearing exhaust hole 21, namely, the high-pressure exhaust coming out from the first outlet flows out from three directions respectively, so that the exhaust resistance caused by congestion in the process of flowing out from one direction and the overlarge impact force of large flow on the local part of the valve block are avoided, the problem of large exhaust resistance of an exhaust structure is solved, the indication efficiency of the compressor is improved, the power consumption is reduced, the high-frequency performance of the compressor is improved, and the energy efficiency attenuation is reduced.

In addition, the exhaust structure of this application improves the exhaust resistance under the condition of not increaseing exhaust hole outlet cross sectional area, promotes compressor performance, reduces the attenuation range of high-frequency energy efficiency. Wherein the sectional area of the outlet of the exhaust hole is the sectional area of the first outlet.

In this embodiment, the inlet of the vent body 22 is a first inlet; the first outlet is positioned on a first preset surface of the bearing 20, and the outlet of the exhaust hole body 22 is positioned on the first preset surface; one end of the diversion concave part 23, which is far away from the inlet of the exhaust hole body 22, extends to a first preset surface, and one end of the diversion concave part 23, which is far away from the inlet of the exhaust hole body 22, and the outlet of the exhaust hole body 22 form a first outlet together.

It should be noted that, in the direction from the first inlet to the first outlet, the bearing exhaust hole 21 has the exhaust hole body 22 and the diversion recessed portion 23 which are sequentially arranged along the bearing direction of the bearing, and the exhaust hole body 22 and the diversion recessed portion 23 have diversion surfaces in different directions, so that the high-pressure exhaust resistance can be effectively reduced, the indication efficiency of the compressor is improved, the power consumption is reduced, the high-frequency performance of the compressor is improved, and the energy efficiency attenuation is reduced.

Specifically, the bearing 20 has a first end face and a second end face arranged oppositely along the axial direction thereof, and the second end face is located on one side of the first end face away from the cylinder 10; the bearing exhaust hole 21 extends from the first end surface toward the second end surface.

Specifically, the first predetermined surface may be a second end surface of the bearing 20 away from the cylinder 10.

In this embodiment, the flow guiding recessed portion 23 is plural, and the plural flow guiding recessed portions 23 are sequentially arranged along the circumferential direction of the exhaust hole body 22. The arrangement can guide the high-pressure exhaust from multiple directions, and further reduces the exhaust resistance.

In the present embodiment, there are two flow guiding recesses 23, and the two flow guiding recesses 23 are disposed opposite to each other. Wherein the discharge hole body 22 serves as an inlet section of the bearing discharge hole 21 while penetrating to the first outlet. Specifically, two water conservancy diversion depressed parts 23 are symmetrical arrangement in the direction perpendicular to the valve block opening direction mutually, and water conservancy diversion depressed part 23 connects exhaust hole body 22 and first export, and water conservancy diversion depressed part 23 constitutes first export with exhaust hole body 22 jointly. The arrangement guides the high-pressure exhaust from multiple directions, and further reduces the exhaust resistance.

In this embodiment, the first inlet is an elliptical opening and the first outlet is a circular opening. The arrangement can change the shape of the hole wall of the exhaust hole body 22 under the condition of ensuring the sectional area of the first outlet, namely, the diversion surface for high-pressure exhaust is changed, and the diversion direction is changed.

In the present embodiment, as shown in fig. 5, a first included angle between the central line of the vent hole body 22 and the valve sheet 30 at the installation position is θ; wherein 0 DEG < theta < 90 deg. It should be noted that the first included angle θ can also be said to be 90 degrees minus the included angle between the center line of the exhaust hole body 22 and the axis of the bearing 20. Specifically, in fig. 5, the center line of the discharge hole body 22 in thebase:Sub>A-base:Sub>A section is arranged atbase:Sub>A first angle θ with the valve sheet 30 at the mounting position.

Preferably, the first included angle theta is in a range of 40 degrees < theta < 70 degrees.

In the present embodiment, as shown in fig. 6, the flow guiding recessed portion 23 forms a flow guiding inclined surface 231 on the hole wall of the exhaust hole body 22; a second included angle β is formed between the flow guiding inclined surface 231 and the axial direction of the bearing 20; wherein the content of the first and second substances,

specifically, in fig. 6, the diversion inclined plane 231 has a second included angle β with the center line of the exhaust hole body 22 in the B-B section.

Preferably, the first and second liquid crystal display panels are,

in this embodiment, a crescent 12 is disposed at one end of the cylinder exhaust cavity 11 close to the first inlet, and the crescent 12 is communicated with the first inlet. Wherein, the crescent 12 is an oblique cut on the cavity wall of the cylinder exhaust cavity 11.

In this embodiment, the exhaust structure further includes a baffle 40, the baffle 40 is connected to the bearing 20, and the baffle 40 is located on a side of the valve plate 30 away from the cylinder 10, so as to limit the valve plate 30 when the valve plate 30 is opened.

During the concrete implementation, under the certain circumstances of total sectional area and volume of bearing exhaust hole 21, the cooperation design of exhaust hole body 22 and water conservancy diversion depressed part 23 has great influence to actual technological effect: to better demonstrate the effectiveness of the present application, please refer to FIG. 2, which isbase:Sub>A sectional view at section A-A, FIG. 5, and FIG. 6, which isbase:Sub>A sectional view at section B-B. The first included angle θ is illustrated in fig. 5 and the second included angle β in fig. 6.

Specifically, the larger the first included angle theta is, the lower the flow guiding effect is, and when theta is 90 degrees, the flow guiding effect is basically absent; the smaller the first included angle θ, the smaller the cross-sectional area of the first inlet is, and the larger the exhaust resistance of the first inlet is, while maintaining the same size of the first outlet cross-sectional area. Meanwhile, in order to ensure the effects of diversion and reduction of exhaust resistance, the larger the volume of the crescent 12 matched with the bearing exhaust hole 21 is, the larger the influence of the reduction of the indicating efficiency caused by the overlarge volume of the crescent 12 (the overlarge clearance volume) on the improvement of the indicating efficiency caused by the reduction of the exhaust resistance caused by the diversion effect is, so that the first included angle theta value has a better value range.

In the first embodiment, as shown in fig. 11a to 11c, θ =40 °, β =60 °, (90- β)/θ =0.75, because smaller θ results in smaller cross-sectional area of the discharge hole body 22, affecting discharge resistance at the first inlet. In the exhaust resistance loss and indicating efficiency trend graph of the exhaust hole body 22 along with the angle theta in fig. 12, we can find that the indicating efficiency is high when the angle theta is between 40 and 70 degrees, and the exhaust resistance is relatively small (the angle of 90 degrees corresponds to the structure in the prior art).

In specific implementation, beta is (90-beta) < theta to ensure the flow guiding effect of the flow guiding concave part 23. Fig. 9a to 9c: the schematic view when θ =60 °, β =30 °, and (90- β)/θ =1 showsbase:Sub>A cross section of the flow guide recess 23 inbase:Sub>A cross section taken alongbase:Sub>A-base:Sub>A. Fig. 10a to 10c: the schematic view of θ =60 °, β =0 °, and (90- β)/θ =1.5 affects not only the cross section of the flow guide recess 23 but also the flow guide cross section of the discharge hole body 22.

In the second embodiment, as shown in fig. 7a to 7c, θ =60 °, β =80 °, and (90- β)/θ =0.17, the smaller the value of 90- β, the smaller the lateral exhaust passage, the poor flow diversion effect and the limited resistance reduction effect are obtained; wherein, the proportion of the diversion recess 23 is small in both the section view of the A-A section and the section view of the B-B section.

In the third embodiment, θ =60 °, β =40 °, (90- β)/θ =0.83, as shown in fig. 8a to 8 c.

FIG. 13 is a graph showing the trend of the loss of exhaust resistance and the indicated efficiency change obtained from the simulation in which θ is 60 degrees and the value of (90-. Beta.)/θ is from 0 to 1.

The exhaust structure of the application solves the following technical problems: the exhaust resistance is large; the high-frequency indication efficiency of the compressor is low, the power consumption is high, and the energy efficiency is low.

The invention also provides a compressor, which comprises an exhaust structure, wherein the exhaust structure is the exhaust structure in the embodiment.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An exhaust structure, comprising:

the cylinder (10) is provided with a cylinder exhaust cavity (11) and a crescent groove (12) communicated with the cylinder exhaust cavity (11);

the bearing (20) is provided with a bearing exhaust hole (21), and a first inlet of the bearing exhaust hole (21) is communicated with the crescent groove (12);

the valve plate (30) is connected with the bearing (20), and the valve plate (30) is provided with an installation position which is covered on a first outlet of the bearing exhaust hole (21);

the bearing exhaust hole (21) comprises an exhaust hole body (22), and the central line of the exhaust hole body (22) is obliquely arranged with the valve plate (30) at the mounting position; a flow guide concave part (23) is arranged on the hole wall of the exhaust hole body (22);

the first inlet is an oval opening, and the first outlet is a round opening so as to change the flow guide direction;

a first included angle between the central line of the exhaust hole body (22) and the valve plate (30) at the mounting position is theta;

the flow guide concave part (23) forms a flow guide inclined plane (231) on the hole wall of the exhaust hole body (22); a second included angle beta is formed between the flow guide inclined plane (231) and the axial direction of the bearing (20); wherein the content of the first and second substances,

2. the exhaust structure according to claim 1, wherein the inlet of the vent body (22) is the first inlet; the first outlet is positioned on a first preset surface of the bearing (20), and the outlet of the exhaust hole body (22) is positioned on the first preset surface;

one end of the diversion concave part (23) far away from the inlet of the exhaust hole body (22) extends to the first preset surface, and one end of the diversion concave part (23) far away from the inlet of the exhaust hole body (22) and the outlet of the exhaust hole body (22) jointly form the first outlet.

3. The exhaust structure according to claim 2, wherein the flow guide recess portion (23) is plural, and the plural flow guide recess portions (23) are sequentially provided in a circumferential direction of the exhaust hole body (22).

4. The exhaust structure according to claim 2, wherein the flow guide recesses (23) are two, and the two flow guide recesses (23) are disposed opposite to each other.

5. The exhaust structure according to claim 4, characterized in that 0 ° < θ < 90 °.

6. The exhaust structure according to claim 5, characterized in that the first included angle θ ranges from 40 ° < θ < 70 °.

7. A compressor comprising a discharge structure, characterized in that it is a discharge structure according to any one of claims 1 to 6.