CN113757112A

CN113757112A - High-pressure cavity construction mechanism of compressor

Info

Publication number: CN113757112A
Application number: CN202110930901.0A
Authority: CN
Inventors: 常艳红; 杨春立; 康庆禹; 王前; 宋旸; 陈新雨
Original assignee: Panasonic Appliances Compressor Dalian Co Ltd
Current assignee: Panasonic Appliances Compressor Dalian Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2021-12-07

Abstract

The invention discloses a high-pressure cavity construction mechanism of a compressor, relates to the technical field of scroll compressors, and particularly relates to a construction design of a high-pressure cavity structure of a scroll compressor. The upper part of the fixed scroll is a flat plane; the middle part of the exhaust pipe is provided with an exhaust passage A which is communicated up and down; a valve plate is arranged between the upper part of the fixed vortex and the high-low pressure partition plate; the middle part of the valve plate is provided with a high-pressure cavity, and the upper part of the high-pressure cavity is provided with a fixed vortex exhaust channel B; the lower end of the valve plate and the top end of the fixed scroll ensure the relative positions of the valve plate and the fixed scroll through a positioning pin; the contact surface of the valve plate and the fixed scroll is smooth enough, a sealing gasket is arranged between the valve plate and the fixed scroll for sealing, and the valve plate is fixed on the upper part of the fixed scroll through the pretightening force of a bolt; the upper part of the valve plate is provided with a sealing structure sealed with the high-low pressure partition plate, wherein a sealing ring is arranged, and the sealing between the valve plate and the high-low pressure partition plate is realized. The technical scheme of the invention solves the technical problems in the prior art, and has the advantages of simple mechanism, convenience in installation, low maintenance cost and the like.

Description

High-pressure cavity construction mechanism of compressor

Technical Field

The invention discloses a high-pressure cavity construction mechanism of a compressor, relates to the technical field of scroll compressors, and particularly relates to a construction design of a high-pressure cavity structure of a scroll compressor.

Background

The existing internal low-pressure scroll compressor is mainly divided into a high-pressure cavity and a low-pressure cavity by a high-pressure and low-pressure partition plate, the high-pressure partition plate is positioned on the upper part of a fixed scroll, and pressure separation is realized by sealing the fixed scroll and an upper cover. Under the general condition, decide vortex back and set up boss and high-low pressure baffle hole cooperation, increase the sealing washer form and seal, do not produce too big axial force to the supporting part article for guaranteeing the pressure differential value, the area of deciding the vortex boss is less generally. When a large-sized exhaust valve structure needs to be installed on the fixed scroll boss under a specific condition, the installation cannot be realized due to the limitation of the boss area.

When the existing internal low-pressure compressor runs under a specific condition, an unloading valve needs to be added to ensure the sufficient reliability of the compressor, improve the seasonal energy efficiency ratio and the like. The installation position of the unloading valve is influenced by the high-low pressure partition plate, the unloading valve cannot be directly unloaded to the high-pressure cavity and can only be unloaded to the low-pressure cavity, so that a lot of difficulties are caused to the design of an unloading structure, the unloading structure becomes complex and cumbersome, and the running reliability of the compressor is poor.

The existing internal low-pressure compressor is provided with a common exhaust valve at the back of a fixed scroll boss, and the fixed scroll boss is matched with an inner hole of a high-low pressure partition plate, so that the back thickness of the fixed scroll is increased for ensuring the sufficient strength of the fixed scroll, the distance between the tooth bottom surface of the fixed scroll and the installation surface of an exhaust valve seat is larger, a larger clearance volume exists in the compression process, and the power consumption is increased.

The existing internal low-pressure compressor can generate certain noise due to the influence of airflow pulsation in the exhaust process, and a silencing cover is generally added around an exhaust valve for reducing the noise, but cannot be installed under certain conditions due to the influence of the structure, the size and the space.

In view of the above problems in the prior art, it is necessary to design a novel high-pressure cavity constructing mechanism of a compressor to overcome the problems in the prior art.

Disclosure of Invention

The large-size exhaust valve cannot be installed due to the limitation of the area of the fixed vortex boss according to the prior art; the unloading valve is influenced by the high-low pressure partition plate and cannot be directly unloaded to the high-pressure cavity, so that the unloading structure is complex and complicated, and the reliability is poor; the fixed scroll boss is high in height, so that the exhaust clearance is large, and the power consumption is increased; the technical problems that the silencing cover cannot be installed due to the limited space and the like are solved, and the high-pressure cavity construction mechanism of the compressor is provided. The invention mainly utilizes an independent high-pressure cavity structure established between the high-low pressure partition plate and the fixed vortex to lead the high-low pressure partition plate and the fixed vortex not to be directly connected, the increased space size does not influence the whole stress, and the distance of an exhaust channel is shortened, thus leading the problems generated by the direct connection of the high-low pressure partition plate and the fixed vortex to be fully solved.

The technical means adopted by the invention are as follows:

a compressor high pressure cavity build mechanism comprising: the device comprises a high-low pressure partition plate, a fixed scroll, a valve plate, a sealing gasket, a sealing ring, a bolt and a positioning pin;

further, the upper part of the fixed scroll is a flat plane; an exhaust passage A which is communicated up and down is arranged in the middle of the fixed vortex;

further, a valve plate is arranged between the upper part of the fixed vortex and the high-low pressure partition plate;

furthermore, the middle part of the valve plate is provided with a high-pressure cavity, high-pressure gas is in the cavity, and the upper part of the cavity is provided with a fixed vortex exhaust channel B; the exhaust passage B, the high-pressure cavity and the exhaust passage A are communicated;

further, the lower end of the valve plate and the top end of the fixed scroll ensure the relative positions of the valve plate and the fixed scroll through a positioning pin;

furthermore, the contact surface of the valve plate and the fixed scroll is smooth enough, a sealing gasket is arranged between the valve plate and the fixed scroll for sealing, and the valve plate is fixed on the upper part of the fixed scroll through the pretightening force of a bolt;

further, the upper portion of the valve plate is provided with a sealing structure sealed with the high-low pressure partition plate, wherein a sealing ring is installed, and sealing between the valve plate and the high-low pressure partition plate is achieved.

Further, the valve plate is processed in one form of casting and powder metallurgy, so that the valve plate has enough strength and reliability;

furthermore, the valve plate is also provided with an intermediate pressure cavity;

further, the middle pressure cavity is arranged outside the high pressure cavity;

furthermore, the middle pressure cavity can be designed to surround the outside of the high pressure cavity, and the middle pressure cavity can also be designed to be a plurality of middle pressure cavities which are uniformly distributed outside the high pressure cavity.

Further, the connection position relationship between the valve plate and the high-low pressure partition plate includes, but is not limited to, the following three forms:

furthermore, the top of the valve plate is embedded into the inner side of the lower part of the high-low pressure partition plate, and a sealing structure is arranged between the valve plate and the high-low pressure partition plate;

further, the bottom of the high-low pressure partition plate is embedded into the inner side of the top of the valve plate, and a sealing structure is arranged between the high-low pressure partition plate and the valve plate;

furthermore, the high-low pressure partition plate is positioned at the top of the valve plate, and a sealing structure is arranged between the high-low pressure partition plate and the valve plate;

further, the sealing structure adopts a molding filler sealing form.

Further, the sealing manner between the valve plate and the fixed scroll includes, but is not limited to, the following four manners:

further, a gasket is adopted for sealing between the valve plate and the fixed vortex, and the gasket can be in a full-plane, drawing surface and concave-convex surface form;

furthermore, a molding packing sealing mode is adopted between the valve plate and the fixed scroll, and the sealing groove can be arranged on the side of the fixed scroll or on the side of the valve plate;

furthermore, the valve plate and the fixed scroll are sealed by sealant, and a contact surface has a certain pressing force;

furthermore, a sealing ring is not arranged between the valve plate and the fixed scroll, and the mode of oiling the surface of metal and sealing the metal by direct contact is adopted.

Furthermore, the formed filler seal can be made of rubber, plastic, leather, metal or a combination material;

further, the form of the mold filler seal may take the form of O-shape, V-shape, U-shape, etc., wherein the opening direction of the V-shape and the U-shape is set to be opened upward or to both sides according to the pressure direction;

further, the number of the mold filler seals can be selected to be one or more.

Furthermore, the gasket sealing can be made of non-metal sealing gaskets, and metal and non-metal combined sealing gaskets;

further, the shim surface may be planar or in a convex pattern in the middle.

Further, the positioning manner between the valve plate and the fixed scroll includes, but is not limited to, the following three manners:

furthermore, the valve plate and the fixed vortex are positioned and connected in a pin hole positioning mode;

furthermore, the valve plate and the fixed vortex are in positioning connection in a boss and groove matching mode;

further, the valve plate and the fixed scroll are connected in a positioning mode through a tool.

Compared with the prior art, the invention has the following advantages:

1. according to the high-pressure cavity construction mechanism of the compressor, the high-pressure cavity is constructed between the high-pressure and low-pressure partition plate and the fixed scroll, so that the size of the high-pressure cavity can be designed to be large enough according to the size design requirement of the exhaust valve, and the axial force cannot be increased;

2. according to the compressor high-pressure cavity construction mechanism provided by the invention, the unloading mechanism is additionally arranged on the upper part of the fixed scroll, so that the unloading mechanism can be directly unloaded into the high-pressure cavity, and the unloading structure is simple and convenient in design;

3. according to the high-pressure cavity construction mechanism of the compressor, when the exhaust valve is arranged on the back surface of the fixed scroll, the distance between the exhaust valve and the bottom of the scroll tooth is reduced, and the clearance volume is reduced, so that the power consumption is reduced, and the energy efficiency of the compressor is improved;

4. the high-pressure cavity construction mechanism of the compressor provided by the invention has the noise reduction function of the noise reduction cover, is arranged between the fixed scroll and the high-pressure and low-pressure partition plates, reduces the space occupied by the exhaust cavity and is convenient to install.

In conclusion, the technical scheme of the invention solves the technical problems in the prior art, and has the advantages of simple mechanism, convenience in installation, low maintenance cost and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a valve plate of the present invention with the upper end embedded in the lower portion of a high-low pressure partition plate and a V-shaped sealing ring;

FIG. 3 is a schematic structural view of the valve plate of the present invention with the upper end embedded in the lower portion of the high and low pressure partition plates and an O-ring seal structure;

FIG. 4 is a schematic structural view of the valve plate of the present invention with two O-ring seals embedded in the lower portion of the high and low pressure partition plates;

FIG. 5 is a schematic structural view showing that the lower portion of the high-low pressure partition plate is embedded in the upper end of the valve plate, and the sealing groove is formed on the side of the high-low pressure partition plate according to the present invention;

FIG. 6 is a schematic structural view showing that the lower portion of the high-low pressure partition plate of the present invention is embedded in the upper end of the valve plate and the sealing groove is formed on the side of the valve plate;

FIG. 7 is a schematic structural view of the high-low pressure partition plate of the present invention located on the top of the valve plate, and the sealing groove located on the side of the high-low pressure partition plate, and using a V-shaped sealing ring;

FIG. 8 is a schematic structural view of the high-pressure and low-pressure partition plate of the present invention located on the top of the valve plate, and the sealing groove located on the side of the valve plate, and using an O-ring seal;

FIG. 9 is a schematic view of the valve plate and the high-low pressure partition plate of the present invention in the form of a multiple sealing structure;

FIG. 10 is a schematic view of a sealing structure of the invention in which a sealing groove between a valve plate and a fixed scroll is formed on one side of the fixed scroll;

FIG. 11 is a schematic view of a sealing structure of the invention in which a sealing groove between a valve plate and a fixed scroll is formed on one side of the valve plate;

FIG. 12 is a schematic view of the seal arrangement between the valve plate and the non-orbiting scroll of the present invention using a sealant or oil applied seal arrangement;

FIG. 13 is a schematic view of the valve plate and the fixed scroll of the present invention with the boss and the recess cooperating to radially position.

In the figure: 1. the high-low pressure partition plate comprises a high-low pressure partition plate 2, a fixed scroll 3, a valve plate 4, a sealing gasket 5, a sealing ring 6, a bolt 7, a positioning pin A, a high-pressure cavity B, an intermediate pressure cavity L1, an exhaust channel A L2 and an exhaust channel B.

Detailed Description

It should be noted that the embodiments and features of the embodiments 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.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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 exemplary embodiments according to the invention. 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 relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature 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 term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

Example 1

As shown in fig. 1, the present invention provides a high pressure cavity constructing mechanism of a compressor, comprising: the high-low pressure separator comprises a high-low pressure separator 1, a fixed scroll 2, a valve plate 3, a sealing gasket 4, a sealing ring 5, a bolt 6 and a positioning pin 7; the upper part of the fixed scroll 2 is a flat plane; an exhaust passage AL1 which is communicated up and down is arranged in the middle of the fixed scroll 2; a valve plate 3 is arranged between the upper part of the fixed scroll 2 and the high-low pressure partition plate 1; the valve plate 3 is processed by adopting one form of casting and powder metallurgy, so that the valve plate has enough strength and reliability; the middle part of the fixed scroll is provided with a high-pressure cavity A, high-pressure gas is filled in the cavity, and the upper part of the fixed scroll is provided with an exhaust channel BL2 of the fixed scroll 2; the exhaust channel BL2, the high-pressure cavity A and the exhaust channel AL1 are communicated; the valve plate 3 is also provided with an intermediate pressure cavity B; the middle pressure cavity B can be designed to surround the outside of the high pressure cavity A, or a plurality of middle pressure cavities B can be designed to be uniformly distributed outside the high pressure cavity A; the lower end of the valve plate 3 and the top end of the fixed scroll 2 ensure the relative positions of the two through a positioning pin 7; the contact surface of the valve plate 3 and the fixed scroll 2 is smooth enough, a sealing gasket 4 is arranged between the valve plate 3 and the fixed scroll for sealing, and the valve plate 3 is fixed on the upper part of the fixed scroll 2 through the pretightening force of a bolt 6; the upper part of the valve plate 3 is provided with a sealing structure sealed with the high-low pressure partition plate 1, wherein a sealing ring 5 is arranged, and the sealing between the valve plate 3 and the high-low pressure partition plate 1 is realized.

The valve plate 3 and the high-low pressure partition plate 1 are connected in a position relation that the top of the valve plate 3 is embedded into the inner side of the lower part of the high-low pressure partition plate 1, and a sealing structure is arranged between the valve plate 3 and the high-low pressure partition plate 1; the sealing structure adopts a sealing form of molding filler.

A gasket 4 is adopted for sealing between the valve plate 3 and the fixed scroll 2, and the gasket 4 is in a full-plane form;

the valve plate 3 and the fixed scroll 2 are positioned and connected by a pin hole positioning mode.

Example 2

As shown in fig. 2, (in addition to example 1), the top of the valve plate 3 of the present invention is inserted into the lower inner side of the high-low pressure partition 1, and the two are sealed by a V-shaped seal ring.

Example 3

As shown in fig. 3, (in addition to embodiment 1) the top of the valve plate 3 of the present invention is embedded inside the lower portion of the high-low pressure partition plate 1, and the two plates 1 are sealed by an O-ring.

Example 4

As shown in fig. 4, (in addition to embodiment 1) the top of the valve plate 3 of the present invention is embedded inside the lower portion of the high-low pressure partition 1, and two O-rings are used to seal between them.

Example 5

As shown in fig. 5, (in addition to embodiment 1) the bottom of the low-pressure diaphragm 1 of the present invention is fitted into the top inner side of the valve plate 3, and a seal groove is provided between the two on the high-pressure and low-pressure diaphragm 1 side, and is sealed by an O-ring.

Example 6

As shown in fig. 6, (in addition to embodiment 1) the bottom of the low-pressure diaphragm 1 of the present invention is fitted into the top inner side of the valve plate 3, and a seal groove is provided between the two on the diaphragm 3 side, and sealing is performed by an O-ring.

Example 7

As shown in fig. 7, (in addition to embodiment 1) the high-low pressure partition plate 1 of the present invention is located on the top of the valve plate 3, and the seal groove between the two is located on the fixed scroll side, and is sealed by a U-shaped seal ring.

Example 8

As shown in fig. 8, (in addition to embodiment 1) the high-low pressure partition plate 1 of the present invention is located on the top of the valve plate 3, and the seal groove between the two is located on the fixed scroll side, and is sealed by an O-ring.

Example 9

As shown in fig. 9, (on the basis of embodiment 1), the invention also provides a schematic diagram of two sealing forms between the valve plate 3 and the high-low pressure partition plate 1, and a V-shaped ring and an O-shaped ring are used for sealing at the same time.

Example 10

As shown in fig. 10, (in embodiment 1), the valve plate 3 and the fixed scroll 2 of the present invention are sealed by the mold packing 4, and the seal groove is provided on the fixed scroll 2 side.

Example 11

As shown in fig. 11, (in addition to embodiment 1) the valve plate 3 and the fixed scroll 2 of the present invention are sealed by the mold packing 4, and the seal groove is provided on the valve plate 3 side.

Example 12

As shown in fig. 12, (on the basis of embodiment 1) the valve plate 3 and the fixed scroll 2 of the present invention are sealed by sealant, and the contact surface has a certain pressing force; or a sealing ring is not arranged between the valve plate 3 and the fixed vortex 2, and the form of oil coating on the metal surface and metal direct contact sealing is adopted.

Example 13

As shown in fig. 13, (on the basis of embodiment 1), the present invention further provides a method for radially positioning the valve plate 3 and the fixed scroll 2 by using a boss and a groove, wherein the boss may be disposed on the side of the fixed scroll 2 or on the side of the valve plate 3, the other side of the boss is provided with a corresponding groove, and circumferential positioning may be achieved by using a pin hole or a bolt hole.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a mechanism is built to compressor high pressure cavity, its characterized in that, mechanism is built to compressor high pressure cavity include: the device comprises a high-low pressure partition plate (1), a fixed scroll (2), a valve plate (3), a sealing gasket (4), a sealing ring (5), a bolt (6) and a positioning pin (7);

the upper part of the fixed scroll (2) is a flat plane; an exhaust passage A (L1) which is communicated up and down is arranged in the middle of the fixed scroll (2);

a valve plate (3) is arranged between the upper part of the fixed vortex (2) and the high-low pressure partition plate (1);

the middle part of the valve plate (3) is provided with a high-pressure cavity (A), high-pressure gas is filled in the cavity, and the upper part of the cavity is provided with an exhaust passage B (L2) of the fixed vortex (2); the exhaust passage B (L2), the high-pressure cavity (A) and the exhaust passage A (L1) are communicated;

the lower end of the valve plate (3) and the top end of the fixed scroll (2) ensure the relative positions of the two through a positioning pin (7);

the contact surface of the valve plate (3) and the fixed scroll (2) is smooth enough, a sealing gasket (4) is arranged between the valve plate and the fixed scroll for sealing, and the valve plate (3) is fixed on the upper part of the fixed scroll (2) through the pretightening force of a bolt (6);

the upper part of the valve plate (3) is provided with a sealing structure sealed with the high-low pressure partition plate (1), wherein a sealing ring (5) is arranged, and the sealing between the valve plate (3) and the high-low pressure partition plate (1) is realized.

2. The compressor high pressure cavity build mechanism of claim 1, wherein:

the valve plate (3) is processed in one of casting and powder metallurgy, so that the valve plate has enough strength and reliability;

the valve plate (3) is also provided with an intermediate pressure cavity (B);

the middle pressure cavity (B) is arranged outside the high pressure cavity (A);

the middle pressure cavity (B) can be designed to be one surrounding the outside of the high pressure cavity (A), and also can be a plurality of middle pressure cavities which are uniformly distributed outside the high pressure cavity (A).

3. The compressor high pressure cavity build mechanism of claim 2, wherein:

the connection position relationship between the valve plate (3) and the high-low pressure partition plate (1) comprises but is not limited to the following three forms:

31. the top of the valve plate (3) is embedded into the inner side of the lower part of the high-low pressure partition plate (1), and a sealing structure is arranged between the valve plate and the high-low pressure partition plate;

32. the bottom of the high-low pressure partition plate (1) is embedded into the inner side of the top of the valve plate (3), and a sealing structure is arranged between the high-low pressure partition plate and the valve plate;

33. the high-low pressure partition plate (1) is positioned at the top of the valve plate (3), and a sealing structure is arranged between the high-low pressure partition plate and the valve plate;

the sealing structure adopts a sealing form of molding filler.

4. The compressor high pressure cavity build mechanism of claim 3, wherein:

the sealing mode between the valve plate (3) and the fixed scroll (2) comprises but is not limited to the following four modes:

41. a gasket (4) is adopted for sealing between the valve plate (3) and the fixed vortex (2), and the gasket (4) can be in a form of a full plane, a drawing surface and a concave-convex surface;

42. a molding packing sealing mode is adopted between the valve plate (3) and the fixed scroll (2), and the sealing groove can be arranged on the side of the fixed scroll (2) and can also be arranged on the side of the valve plate (3);

43. the valve plate (3) and the fixed scroll (2) are sealed by sealant, and a contact surface has a certain pressing force;

44. a sealing ring is not arranged between the valve plate (3) and the fixed scroll (2), and the mode of oiling the surface of metal and sealing the metal by direct contact is adopted.

5. The compressor high pressure cavity build mechanism of claim 4, wherein:

the positioning mode between the valve plate (3) and the fixed scroll (2) comprises but is not limited to the following three modes:

51. the valve plate (3) is connected with the fixed scroll (2) in a positioning manner by a pin hole;

52. the valve plate (3) and the fixed scroll (2) are in positioning connection in a boss and groove matching mode;

53. the valve plate (3) and the fixed scroll (2) are connected in a positioning mode through a tool.