CN221824064U - Scroll compressor valve assembly - Google Patents

Abstract

The utility model discloses a valve assembly for a scroll compressor, relates to the technical field of scroll compressors, and particularly relates to a valve assembly for a scroll compressor. The fixed vortex plate is fixedly arranged in a compressor main body; the base plate of the fixed vortex plate is provided with an unloading port and an exhaust port which are vertically communicated; the movable vortex and the fixed vortex disk are assembled in a matched manner through the movable vortex teeth, the fixed vortex teeth and the fixed vortex teeth; the top end of the vortex plate is provided with a valve component which is positioned at the upper part of the exhaust port; the valve assembly consists of a valve plate member and a valve plate holding member which have the same external structure; after the valve plate protecting member is vertically aligned with the valve plate member; and positioning and assembling are performed through the positioning member and a positioning opening arranged on the upper end surface of the fixed scroll. The technical scheme of the utility model solves the problems that in the prior art, extra power consumption is required under the condition of over-compression, the working efficiency of the scroll compressor is improved, meanwhile, the starting current is increased, extra work is lost and the like.

Description

Scroll compressor valve assembly

Technical Field

The utility model relates to a valve assembly for a scroll compressor, and relates to the technical field of scroll compressors, in particular to a valve assembly for a scroll compressor.

Background Art

The scroll compressor belongs to the variable volume compression machinery. The scroll compressor includes a fixed scroll component with involute blades and a movable scroll component with involute blades matched with the fixed scroll component. The blades of the fixed scroll component and the movable scroll component mesh with each other to form a plurality of cavities with variable volumes, thereby compressing the working fluid (for example, refrigerant or other gases, etc.). Usually, after the working fluid is introduced into the variable cavity from the air intake port, the working fluid is compressed by the movement of the fixed scroll component and the movable scroll component driven by the motor or other power input, and the compressed high-pressure gas is discharged through the exhaust port, thereby completing the gas intake, compression and discharge. In the specific application of the scroll compressor, there is a situation where the exhaust pressure exceeds the actual required pressure, and this working state is called over-compression. Over-compression requires additional power loss, which has a negative impact on improving the working efficiency of the scroll compressor; similarly, in the startup stage of the scroll compressor, when the pressure of the exhaust chamber has not yet been established, the working gas does not need a higher exhaust pressure, which will cause an increase in the starting current and also lose additional work.

In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new valve assembly for a scroll compressor to overcome the problems existing in the prior art.

Summary of the invention

According to the above-mentioned prior art, when over-compression occurs, additional power consumption is required, which has a negative impact on improving the working efficiency of the scroll compressor, and also causes an increase in the starting current, loss of additional work and other technical problems, a valve assembly for a scroll compressor is provided. The utility model mainly arranges a valve assembly for selectively opening or closing the orifice on the exhaust port and the unloading port at the top of the fixed scroll disk, so as to perform early exhaust when the fluid pressure in the corresponding compression chamber is greater than the preset pressure value or when the high and low pressures are not established in the startup stage, thereby avoiding additional power loss and improving the efficiency of the scroll compressor.

The technical means adopted by the utility model are as follows:

A valve assembly for a scroll compressor comprises a compressor body, a fixed scroll, a movable scroll and an exhaust chamber; the fixed scroll is fixedly installed in the compressor body; a base plate of the fixed scroll is provided with an unloading port and an exhaust port which are connected vertically; the movable scroll and the fixed scroll are assembled by means of a movable scroll tooth, a fixed scroll tooth and a fixed scroll tooth;

Furthermore, a valve assembly is provided at the top end of the fixed scroll, and the valve assembly is located at the upper part of the exhaust port;

Furthermore, the valve assembly is composed of a valve plate component and a valve plate retaining component having the same external structure;

Furthermore, after the valve plate protection component and the valve plate component are aligned up and down, they are positioned and assembled through the positioning component and the positioning opening provided on the upper end surface of the fixed scroll plate.

Furthermore, the valve plate component is an integrally formed structure, and its main body is the sealing surface A;

Furthermore, a valve plate portion is provided on each side of the sealing surface A;

Further, a channel A having the same shape as the exhaust port is provided at the center of the sealing surface A;

Furthermore, the sealing surface A is provided with a positioning device A which cooperates with the positioning component.

Furthermore, the valve plate retaining member is an integrally formed structure, the main body of which is the sealing surface B;

Furthermore, both sides of the sealing surface B are provided with limit surfaces for use with the valve plate part, and the limit surfaces are used to limit the opening size and opening posture of the valve plate part;

Furthermore, the sealing surface B is also provided with a channel B and a positioning device B having the same position and shape as the channel A and the positioning device A.

Further, the valve plate portion is located at the top end portion of the unloading port;

Furthermore, the valve plate part has a certain elasticity; when the working fluid pressure of the intermediate compression chamber where the unloading port is located is less than the sum of the elastic force of the valve plate part and the pressure of the working fluid in the exhaust chamber acting thereon, the valve plate part falls to close the unloading port; when the working fluid pressure of the intermediate compression chamber where the unloading port is located is greater than the sum of the elastic force of the valve plate part and the pressure of the working fluid in the exhaust chamber acting thereon, the valve plate part moves upward to open the unloading port, and the working fluid is discharged into the exhaust chamber in advance through the unloading port.

Furthermore, the sealing surface B is isolated from the exhaust passage after being combined with the exhaust port edge and the sealing surface of the exhaust port.

The positioning member can be cylindrical, conical, cylindrically elastic, conically elastic, or other various forms of components that can achieve the functions.

Compared with the prior art, the utility model has the following advantages:

1. The valve assembly for the scroll compressor provided by the utility model realizes accurate positioning of the valve plate component, the valve plate retaining component and the unloading port through the design of the positioning device, thereby reducing the risk of leakage.

2. The valve assembly for the scroll compressor provided by the utility model realizes the isolation of the unloading channel and the exhaust channel through the design of the sealing surface.

3. The scroll compressor valve assembly provided by the utility model realizes the functions of unloading and exhausting in a limited space through a compact design, thereby increasing the flexibility of the machine layout.

In summary, the technical solution of the utility model solves the problem in the prior art that when over-compression occurs, additional power consumption is required, which has a negative impact on improving the working efficiency of the scroll compressor, and also causes an increase in starting current and loss of additional power.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

FIG1 is a schematic diagram of the structure of a valve assembly with a flat surface on the top of the fixed scroll disk of the utility model;

FIG2 is an enlarged view of part A of FIG1 of the present utility model;

FIG3 is a schematic diagram of the structure of the fixed scroll plate with a boss mounted on the top and a valve assembly of the utility model;

FIG4 is a schematic diagram of the structure of the valve plate component of the utility model;

FIG. 5 is a schematic diagram of the structure of the hair piece protection component of the present invention.

In the figure:

1. Fixed scroll plate 11, base plate 110, unloading port 120, exhaust port 121, exhaust port edge 13, fixed scroll gear

2. Orbital scroll 21. Orbital scroll teeth

3. Exhaust cavity

4. Valve disc component 41, sealing surface A 42, valve disc portion 43, channel A 44, positioning device A;

5. Valve plate retaining member 51, sealing surface B 52, limiting surface 53, channel B 54, positioning device B;

6. Positioning components

7. Partition.

DETAILED DESCRIPTION

It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention 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.

In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

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 utility model. 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.

Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present utility model: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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 their position 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.

In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

As shown in Figures 1-3, the utility model provides a valve assembly for a scroll compressor, including: a housing, a fixed scroll 1, a movable scroll 2, an unloading port 110, an exhaust port 120, and an exhaust chamber 3. The fixed scroll 1 is placed in the housing and has a substrate 11 and a fixed scroll tooth 13 connected thereto. The movable scroll 2 is placed in the housing and has a movable scroll tooth 21. The movable scroll tooth 21 cooperates with the fixed scroll tooth 13 to form a plurality of groups of continuous and mutually unconnected sealed compression chambers. As the movable scroll 2 and the fixed scroll 1 rotate relative to each other around a fixed point, the sealed chamber becomes smaller and the medium therein is compressed. The exhaust port 120 is formed at the center of the substrate 11 of the fixed scroll 1, and the purpose is to discharge the compressed medium. The unloading port 110 is located in a middle sealed chamber between the exhaust port 120 and the initial sealed chamber formed by the fixed scroll tooth 13 and the movable scroll tooth 21. The exhaust chamber 3 is formed between the housing and the upper surface of the fixed scroll substrate 11; or formed between the housing and the additional partition 7, corresponding to the defined sealed compression chamber, and is used to accommodate the medium that has been compressed or the medium in the compression process. The unloading port 110 is opened to the exhaust chamber 3 through the valve plate portion 42 of the valve plate member 4 that prevents reverse flow, thereby realizing the directional flow of the compressed medium in the unloading condition. Two or more groups of unloading holes 110 may respectively include one or more through holes passing through the substrate 11 of the fixed scroll 1, and the number and diameter of the through holes are determined by the overall design of the scroll compressor. The two groups of unloading holes can be symmetrically or asymmetrically arranged relative to the axis of the fixed scroll. The fixed scroll substrate can be arranged as an axial protrusion or a plane portion, and the axial protrusion or the plane portion is provided with a sealing device for isolating the exhaust chamber (high pressure portion) and the suction chamber (low pressure portion).

As shown in Fig. 4, the valve disc member 4 is formed in one piece. The valve disc member includes a valve disc portion 42 that realizes one-way communication and sealing functions, which forms an open or closed match with the fixed scroll 1 substrate to realize the connection or separation of the unloading port 110 and the exhaust chamber; it also includes a channel A43 that is connected to the exhaust port 120; it includes a sealing surface A41 corresponding to the edge 121 of the exhaust port 120; the valve disc member also includes a positioning device A44 corresponding to the positioning member 6; the valve disc member 4 is reliably positioned on the substrate through its positioning device A44 and the positioning member 6 and the positioning port 12 preset on the fixed scroll 1 substrate.

As shown in Figure 5, the valve plate retaining component 5 includes one or more groups of limit surfaces 52 corresponding to the valve plate part 42 of the valve plate component, which limit its opening size and opening posture; it includes a sealing surface B51 corresponding to the valve plate component 41, which realizes isolation from the exhaust channel 120 after combining with the exhaust port edge 121 and the sealing surface A41 of the exhaust port 120; and it also includes a channel B53 connected to the exhaust port 120 and the channel A43; the valve plate retaining component should also include a positioning device B54 corresponding to the positioning component 6; the valve plate retaining component 5 is reliably positioned on the substrate through its positioning device B54 and the positioning component 6 and the positioning port 12 preset on the fixed scroll 1 substrate.

As shown in FIGS. 1-3 , the positioning member 6 may be cylindrical, conical, cylindrically elastic, conically elastic, or other various forms of components that realize functions.

As shown in FIGS. 1-3 , it can be seen how the valve assembly for the scroll compressor of the present invention is connected.

The working steps of the utility model include: after the working fluid is introduced into the variable cavity from the air intake port, the working fluid is compressed by the movement of the fixed scroll component and the movable scroll component driven by the electric motor or other power input; in the startup stage of the scroll compressor, when the pressure of the exhaust chamber has not yet been established, the working fluid still at an intermediate pressure is discharged into the exhaust chamber 3 through a preset group or groups of unloading ports 110 and the valve plate part 42 opened by the pressure; with the continuous compression flow of the working fluid, the pressure of the exhaust chamber gradually increases; when the pressure of the working fluid in the intermediate compression chamber where the unloading port 110 is located is less than the sum of the elastic force of the valve plate part 42 on the valve plate component and the pressure of the working fluid in the exhaust chamber acting thereon, the valve plate part 42 falls to close the unloading port 110, thereby reducing power consumption during the startup process. Similarly, when the working fluid is excessively sucked into the air intake port, the pressure of the working fluid in the intermediate compression chamber where the unloading port 110 is located is greater than the sum of the elastic force of the valve plate portion 42 on the valve plate member and the pressure of the working fluid in the exhaust chamber acting thereon, the valve plate portion 42 moves upward to open the unloading port 110, and the working fluid is discharged into the exhaust chamber 3 in advance through the unloading port 110, preventing the working fluid from being excessively compressed and causing power loss or damage to other components and causing device failure. This reduces the energy consumption during the startup of the scroll compressor and ensures the reliability of long-term operation.

The positioning member can be cylindrical, conical, cylindrically elastic, conically elastic, or other various forms of components that can achieve the functions.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims (5)

1. A valve assembly for a scroll compressor, comprising a compressor body, a fixed scroll (1), a movable scroll (2), and an exhaust chamber (3); the fixed scroll (1) is fixedly mounted in the compressor body; a base plate (11) of the fixed scroll (1) is provided with an unloading port (110) and an exhaust port (120) which are connected vertically; the movable scroll (2) and the fixed scroll (1) are assembled by means of a movable scroll tooth (21), a fixed scroll tooth (21), and a fixed scroll tooth (13); the characteristics are as follows: A valve assembly is provided at the top end of the fixed scroll (1), and the valve assembly is located above the exhaust port (120); The valve assembly is composed of a valve plate component (4) and a valve plate retaining component (5) having the same external structure; After the valve plate protection component (5) and the valve plate component (4) are aligned vertically, they are positioned and assembled through the positioning component (6) and the positioning opening (12) provided on the upper end surface of the fixed scroll plate (1). 2. The scroll compressor valve assembly according to claim 1, characterized in that: The valve plate component (4) is an integrally formed structure, and its main body is the sealing surface A (41); A valve plate portion (42) is provided on each side of the sealing surface A (41); A channel A (43) having the same shape as the exhaust port (120) is provided at the center of the sealing surface A (41); The sealing surface A (41) is provided with a positioning device A (44) which cooperates with the positioning component (6). 3. The scroll compressor valve assembly according to claim 1, characterized in that: The valve plate retaining component (5) is an integrally formed structure, and its main body is a sealing surface B (51); The sealing surface B (51) is provided with limiting surfaces (52) on both sides thereof for use with the valve plate portion (42), and the limiting surfaces (52) are used to limit the opening size and opening posture of the valve plate portion (42); The sealing surface B (51) is also provided with a channel B (53) and a positioning device B (54) having the same position and shape as the channel A (43) and the positioning device A (44). 4. The scroll compressor valve assembly according to claim 2, characterized in that: The valve plate portion (42) is located at the top end portion of the unloading port (110); The valve plate portion (42) has a certain elasticity; when the pressure of the working fluid in the intermediate compression chamber where the unloading port (110) is located is less than the sum of the elastic force of the valve plate portion (42) and the pressure of the working fluid in the exhaust chamber (3) acting thereon, the valve plate portion (42) falls to close the unloading port (110); when the pressure of the working fluid in the intermediate compression chamber where the unloading port (110) is located is greater than the sum of the elastic force of the valve plate portion (42) and the pressure of the working fluid in the exhaust chamber (3) acting thereon, the valve plate portion (42) moves upward to open the unloading port (110), and the working fluid is discharged into the exhaust chamber (3) in advance through the unloading port (110). 5. The scroll compressor valve assembly according to claim 3, characterized in that: The sealing surface B (51) is isolated from the exhaust channel (120) after being combined with the exhaust port edge (121) and the sealing surface (41) of the exhaust port (120).