WO2023125810A1

WO2023125810A1 - Compressor

Info

Publication number: WO2023125810A1
Application number: PCT/CN2022/143401
Authority: WO
Inventors: 孙玉松; 张喜双
Original assignee: 丹佛斯（天津）有限公司
Priority date: 2021-12-31
Filing date: 2022-12-29
Publication date: 2023-07-06

Abstract

A compressor, comprising: a housing (101), the housing (101) having an air inlet (82); a first scroll plate (11) and a second scroll plate (12), which are provided in the housing (101) so as to form a scroll assembly (10), wherein a compression chamber used for compressing a medium is defined between the first scroll plate (11) and the second scroll plate (12); a motor (7), which is provided in the housing (101) and used for driving the first scroll plate (11) to rotate along a rotation axis thereof; and a shielding member (83), which is provided between the air inlet (82) and the scroll assembly (10). According to the compressor, liquid refrigerant can be prevented from directly entering the compression chamber, and the scroll assembly is prevented from being damaged.

Description

compressor

Cross References to Related Applications

This disclosure claims the rights and interests of the Chinese invention patent application 202111681130.2 and the Chinese utility model patent application 202123450147.5 submitted to the State Intellectual Property Office of China on December 31, 2021, the disclosure content of which is incorporated by reference in its entirety into this disclosure.

technical field

The present disclosure relates to the technical field of compressors.

Background technique

In a scroll compressor, the gaseous refrigerant to be compressed from the air inlet is usually mixed with liquid refrigerant (in fact, the gas to be compressed and the liquid refrigerant are different forms of the same substance), since the liquid refrigerant cannot be compressed, Once a large amount of liquid refrigerant is sucked in, it will cause scroll damage.

Contents of the invention

The purpose of the embodiments of the present disclosure is to provide a compressor that can improve the reliability of the compressor, for example, prevent liquid refrigerant from directly entering the compression cavity of the scroll assembly, so as to avoid damage to the scroll assembly.

According to one aspect of the present disclosure, there is provided a compressor, comprising:

a housing, the housing has an air inlet;

The first scroll and the second scroll are arranged in the casing to form a scroll assembly, and a compression cavity for compressing the medium is defined between the first scroll and the second scroll;

a motor, arranged in the housing, used to drive the first scroll to rotate along its axis of rotation, and the first scroll to drive the second scroll to rotate; and

The shielding member is arranged between the air inlet and the scroll assembly.

According to an exemplary embodiment of the present disclosure, the shielding member is disposed at least between a portion of the scroll assembly corresponding to the air inlet and the air inlet.

According to an exemplary embodiment of the present disclosure, the shielding member has a wall structure, and the shielding member is arranged outside at least a part of the outer peripheral surface of the scroll assembly.

According to an exemplary embodiment of the present disclosure, the shielding member has an equal-diameter cylindrical wall structure.

According to an exemplary embodiment of the present disclosure, the shielding member has a variable-diameter cylindrical wall structure such that the shielding member is shaped to conform to at least a portion of the outer peripheral surface of the scroll assembly.

According to an exemplary embodiment of the present disclosure, the shielding member has a semi-cylindrical wall structure and is arranged outside at least a part of the outer peripheral surface of the scroll assembly corresponding to the air inlet.

According to an exemplary embodiment of the present disclosure, the blocking member is made of metal material or non-metal material.

According to an exemplary embodiment of the present disclosure, the compressor further includes: a bracket; wherein, the shielding member further includes an edge portion, the edge portion is opened with a through hole, and the shielding member is fixed to the bracket through the edge portion.

According to an exemplary embodiment of the present disclosure, the edge portion is provided with a notch.

According to an exemplary embodiment of the present disclosure, the motor further includes: a stator and a rotor, the stator is in the bracket, and the outer periphery of the stator includes a flange; Securely fitted to the bracket to secure the shield member and stator together to the bracket.

According to an exemplary embodiment of the present disclosure, the first scroll includes a first end plate and a first scroll wrap protruding from the first end plate in a first direction; the second scroll includes a second end plate and a first scroll wrap protruding from the first end plate; The second scroll wrap protrudes from the second end plate in a second direction opposite to the first direction, and the second scroll wrap cooperates with the first scroll wrap to form a compression cavity; and the bracket is located at a distance from the second scroll wrap One side of the first scroll; wherein, the compressor further includes a driver, the driver is rotatably mounted on the bracket and is located on the side of the second scroll away from the first scroll, and the motor drives the second scroll through the driver. A scroll rotates, and the first scroll drives the second scroll to rotate.

According to an exemplary embodiment of the present disclosure, the first end plate of the first scroll further includes an outer edge portion, the orthographic projection of the shielding member on the first end plate is located on the outer edge portion, and the distance between the shielding member and the outer edge portion There is a first gap between them; wherein, the compressor further includes: a first refrigerant flow path, along which the refrigerant enters the compression cavity from the air inlet through the first gap; and a second refrigerant flow path, Refrigerant enters the compression chamber from the intake port through the second gap along the second refrigerant flow path.

According to an exemplary embodiment of the present disclosure, there is a second gap between the housing and the motor; wherein, the compressor further includes: a second refrigerant flow path along which the refrigerant passes from the air inlet through the second The second gap enters the compression chamber.

According to an exemplary embodiment of the present disclosure, a hollow passage is formed in the driving member, and a fixed shaft fixed to the bracket is arranged in the hollow passage, the fixed shaft has an axial inner hole and a transverse through hole connected to the axial inner hole, and oiled The bolt is arranged in the axial inner hole of the fixed shaft and connected to the second scroll; wherein the compressor further includes: a first lubricating oil flow path along which the lubricating oil passes from the oiling bolt through the shaft Flow into the inner hole and the transverse through hole between the lower end of the driving part and the bracket; the second lubricating oil flow path, the lubricating oil flows from the oiling bolt into the upper end of the driving part and the second scroll along the second lubricating oil flow path between the hubs to lubricate the sliding bearings located therebetween; and a third lubricating oil flow path along which the lubricating oil flows from the oiling bolt through the edge of the end plate of the second scroll and into the first The compression chamber between the scroll and the second scroll.

According to the compressor provided by the embodiments of the present disclosure, a shielding member is provided between the air inlet and the scroll assembly to prevent liquid refrigerant from directly entering the compression chamber of the scroll assembly, so as to avoid damage to the scroll assembly, thereby improving the compressor performance. reliability.

Description of drawings

Preferred embodiments of the present disclosure will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic cross-sectional view of a compressor according to the present disclosure.

Fig. 2 is an exploded schematic diagram of several components in the compressor shown in Fig. 1 .

Fig. 3 is a schematic perspective view of an embodiment of a cover member in a compressor according to the present disclosure.

Fig. 4 is a schematic perspective view of another embodiment of a covering member in a compressor according to the present disclosure.

Detailed ways

The technical solution of the present disclosure will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals designate the same or similar components. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the general inventive concept of the present disclosure, and should not be construed as a limitation of the present disclosure.

In addition, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a comprehensive understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagrammatic form to simplify the drawings.

Referring to FIG. 1 and FIG. 2 , according to an exemplary embodiment of the present disclosure, a compressor 100 is provided, including: a housing 101 , a scroll assembly 10 formed by a first scroll 11 and a second scroll 12 , bracket 4, driver 3 and motor 7, etc. As shown in Figures 1 and 2, the housing 101 has an air inlet 82, the first scroll 11 and the second scroll 12 are arranged in the housing 101 to form a scroll assembly 10, the first scroll 11 A compression chamber for compressing the medium is defined between the second scroll disk 12 and the second scroll disk 12 . The first scroll 11 includes a first end plate 112 and a first scroll wrap 113 extending from the first end plate 112 in the first direction D1; the second scroll 12 includes a second end plate 123 and The end plate 123 extends a second scroll wrap 124 along a second direction D2 opposite to the first direction D1, and the second scroll wrap 124 cooperates with the first scroll wrap 113 to form a compression cavity. The bracket 4 is located on a side of the second scroll 12 away from the first scroll 11 . The motor 7 is arranged in the casing 101 and is used to drive the first scroll 11 to rotate along its rotation axis. The driving member 3 is rotatably mounted on the bracket 4 and located on the side of the second scroll 12 away from the first scroll 11 , the motor 7 drives the first scroll 11 to rotate around its axis of rotation through the driving member 3 , And the first scroll 11 drives the second scroll 12 to rotate around its rotation axis, wherein the rotation axis of the first scroll 11 and the rotation axis of the second scroll 12 are not on the same line and are mutually offset.

According to an embodiment of the present disclosure, as shown in FIGS. 1 and 2 , the compressor 100 further includes a shielding member 83 disposed between the air inlet 82 and the scroll assembly 10 . According to an embodiment of the present disclosure, the shielding member 83 is disposed at least between a part of the scroll assembly 10 corresponding to the air inlet 82 and the air inlet 82, so as to prevent the gas to be compressed from the air inlet directly entering together with the liquid refrigerant. The compression cavity of the scroll assembly 10 is used to avoid damage to the scroll assembly.

1 to 4, according to an exemplary embodiment of the present disclosure, specifically, as shown in FIG. 1 and FIG. outside. For example, the shielding member 83 may adopt a thin-walled structure such as a copper sheet.

Specifically, in an exemplary embodiment as shown in FIG. 2 and FIG. 3 , the blocking member 83 may be a cylindrical wall structure with an equal diameter. In other embodiments not shown, the shielding member 83 may also be a cylindrical wall structure with a variable diameter, so that the shape of the shielding member 83 conforms to at least a part of the outer peripheral surface of the scroll assembly 10, that is, the shielding member The shape of 83 may be adapted to the shape of at least a portion of the outer peripheral surface of the scroll assembly 10 .

Optionally, in another exemplary embodiment as shown in FIG. 4 , the shielding member 83 has a semi-cylindrical wall structure and is arranged outside at least a part of the outer peripheral surface of the scroll assembly 10 corresponding to the air inlet 82 .

According to the present disclosure, the blocking member 83 is made of metal material or non-metal material. In an exemplary embodiment according to the present disclosure, the blocking member 83 is made of a metal material such as copper.

As shown in FIG. 3 , according to an exemplary embodiment of the present disclosure, specifically, the shielding member 83 further includes an edge portion 831, and the edge portion 831 is provided with a through hole 833, and the shielding member 83 is fixed to the bracket 4 through the edge portion 831 (such as Figure 1 and Figure 2). As shown in FIG. 4 , according to another exemplary embodiment of the present disclosure, specifically, the blocking member 83 ′ having a semi-cylindrical wall structure also includes an edge portion 831 ′, and the edge portion 831 ′ is opened with a through hole 833 ′, The blocking member 83' is fixed to the bracket 4 (as shown in FIGS. 1 and 2 ) through the edge portion 831'. In addition, further, as shown in FIG. 4, the edge portion 831' is provided with a notch 832', which can be used to avoid the lead wire of the motor 7, so that the lead wire of the motor 7 can be drawn out from the notch 832'. According to the present disclosure, by providing a shield member 83' with a cylindrical wall structure or a semi-cylindrical wall structure, and opening a gap 832' at the edge portion 831' of the shield member 83, not only the scroll assembly, the motor stator, etc. can be accommodated. Components, and for example, various lead wires from the motor 7 etc. are drawn out from the gap 832 ′, so as to prevent the scroll and the driving member 3 from stirring various lead wires inside the compressor housing during rotation. In addition, fluids such as liquid refrigerant and lubricating oil can also flow through the gap 832'.

Referring to FIGS. 1 and 2 , according to an exemplary embodiment of the present disclosure, the motor 70 further includes: a stator 72 and a rotor 71 . The stator 72 is arranged in the frame 4 . As shown in FIG. 2 , through the through holes (such as the through holes 833 shown in FIG. 2 ) of the edge portion 831 and the flange edge 721 of the stator 72 are fastened to the bracket 4 through fasteners (such as bolts) 89, In order to fix the shielding member 83 and the stator 72 to the bracket 4 together.

As shown in FIG. 1 , according to an exemplary embodiment of the present disclosure, the first end plate 112 of the first scroll 11 further includes an outer edge portion 111 , and the orthographic projection of the blocking member 83 on the first end plate 112 is located on the outer edge. portion 111 , and there is a first gap G1 between the shielding member 83 and the outer edge portion 111 . There is a second gap G2 between the casing 101 and the motor 7 . Specifically, the second gap G2 is located between the upper end of the lower half of the casing 101 and the extension arm of the bracket 4 for supporting the motor 7 . According to an exemplary embodiment of the present disclosure, as shown in FIG. 1 , the compressor 100 includes: a first refrigerant flow path (shown as a thin solid curve with an arrow as shown in FIG. 1 ) F1, and the refrigerant flows along the first A refrigerant flow path F1 enters the compression chamber defined by the first scroll 11 and the second scroll 12 from the intake port 82 through the first gap G1 . The compressor 100 also includes: a second refrigerant flow path (shown by the thin solid curve with arrows as shown in FIG. The gap G2 enters a compression chamber defined jointly by the first scroll 11 and the second scroll 12 . That is to say, the refrigerant enters the housing 101 through the air inlet 82, and a part of the refrigerant flows upward along the first refrigerant flow path F1, bypasses the upper end of the shielding member 83, and then flows downward through the The fluid channel enters the compression chamber, and another part of the refrigerant flows downward along the second refrigerant flow path F2, and enters the motor 7 under the lower end of the shielding member 83 to cool the motor, and then flows upward, and enters the compression chamber through the fluid channel 6 cavity. The outer edge 111 of the first end plate 112 can prevent the gas in the air inlet from continuing to go up and enter the compression chamber through G1, and at the same time, can isolate the air inlet and the exhaust chamber on the upper part of the compressor to avoid inhaled refrigerant Exchange heat with the high-temperature refrigerant in the discharge cavity.

As shown in FIG. 1 , according to an exemplary embodiment of the present disclosure, a hollow passage is formed in the driving member 3, and a fixed shaft 5 fixed to the bracket 4 is arranged in the hollow passage. The fixed shaft 5 has a transverse through hole 85, and an oiling bolt 81 is disposed in the axial bore 58 of the fixed shaft 5 and is connected to the second scroll 12 . According to an exemplary embodiment of the present disclosure, as shown in FIG. 1 , the compressor 100 may include: a first lubricating oil flow path (shown as a dotted curve with an arrow as shown in FIG. 1 ) R1, and the lubricating oil flows along the first A lubricating oil flow path R1 flows from the oiling bolt 81 through the axial inner hole 58 and the transverse through hole 85 between the lower end of the driving member 3 and the bracket 4 to lubricate between the lower end of the driving member 3 and the bracket 4 . Specifically, a part of lubricating oil in the oil pool reaches the transverse through hole 85 through the oiling bolt 81 and lubricates the bearing installed on the inner wall of the lower end of the hub of the driving member 3 through the transverse through hole 85 . Under the action of gravity, this part of lubricating oil flows down into the recess of the bracket 4 and returns to the oil pool through the oil leakage hole at the recess. In this way, along the first lubricating oil flow path R1 , lubricating oil can be supplied to the thrust surfaces between the bearing of the driving member 3 and the fixed shaft 5 , and between the bracket 4 and the fixed shaft 5 via the transverse through hole 85 . As shown in FIG. 1 , the compressor 100 further includes: a second lubricating oil flow path (shown by the dashed curve with an arrow as shown in FIG. 1 ) R2, and the lubricating oil flows from the oiling The bolt 81 flows between the upper end of the driving member 3 and the hub of the second scroll 12 through the gap between the outermost part of the oil bolt 81 and the inner wall of the inner hole of the crankshaft, so as to press the upper end of the driving member 3 and the second scroll. Parts such as the sliding bearing between the hubs of 12 are lubricated. Specifically, a part of the lubricating oil in the oil pool reaches the topmost position of the fixed shaft 5 through the oiling bolt 81, and during the ascent process along the oiling bolt 81, this part of the lubricating oil carries on the sliding bearing at the top of the fixed shaft 5. lubricating. More specifically, this part of lubricating oil lubricates the bearing located between the hub of the second scroll 12 and the inner diameter of the slider, and then part of this part of lubricating oil flows back down through the straight hole on the side of the fixed shaft 5 To the oil pool, another part of this part of lubricating oil flows to the main bearing located outside the hub of the second scroll 12 (one side of the main bearing is connected to the driving member 3 and the other side is connected to the fixed shaft 5) to Lubricate the main bearing, then flow back to the bracket 4, and return to the oil pool through the oil leakage hole at the recess of the bracket 4. During the backflow process, this part of lubricating oil lubricates the contact surface between the second scroll 12 and the driving member 3 at the same time, as well as the shaft shoulder of the fixed shaft 5 and the thrust surface of the hub inner hole of the driving member 3 lubricating. As shown in FIG. 1 , the compressor 100 also includes: a third lubricating oil flow path (shown by the dashed curve with an arrow as shown in FIG. 1 ) R3, and the lubricating oil flows along the third lubricating oil flow path R3 from The bolt 81 flows into the compression chamber defined between the first scroll 11 and the second scroll 12 via the gap 58 between the outermost portion of the oiling bolt 81 and the inner wall of the crankshaft bore.

It can be seen that, according to the compressor provided by the embodiments of the present disclosure, a shielding member is provided between the air inlet and the scroll assembly to prevent liquid refrigerant from directly entering the compression chamber of the scroll assembly, so as to avoid damage to the scroll assembly and at the same time utilize the shielding The component optimizes the flow path of the refrigerant in the compressor, improving the efficiency of the scroll compressor, thereby improving the performance of the compressor.

Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can improve them, and the structures described in various embodiments do not conflict with each other in terms of structure or principle Can be combined freely.

After describing the embodiments of the present disclosure in detail, those skilled in the art can clearly understand that various changes and changes can be made without departing from the scope and spirit of the appended claims, and the present disclosure is not limited Implementations of exemplary embodiments are presented in the specification.

Claims

A compressor (100), comprising:

a housing (101) having an air inlet (82);

A first scroll (11) and a second scroll (12), arranged in the casing to form a scroll assembly (10), between the first scroll and the second scroll defining a compression chamber for the compressed medium;

A motor (7), arranged in the housing, is used to drive the first scroll to rotate along its axis of rotation, and the first scroll to drive the second scroll to rotate; and

A shielding member (83) is arranged between the air inlet and the scroll assembly.
The compressor of claim 1, wherein:

The shielding member is disposed at least between a part of the scroll assembly corresponding to the air inlet and the air inlet.
The compressor of claim 1, wherein:

The shielding member is a wall structure, and the shielding member is arranged outside at least a part of the outer peripheral surface of the scroll assembly.
The compressor of claim 3, wherein:

The shielding member has a cylindrical wall structure with an equal diameter.
The compressor of claim 3, wherein:

The shielding member has a variable-diameter cylindrical wall structure, so that the shape of the shielding member conforms to at least a part of the outer peripheral surface of the scroll assembly.
The compressor of claim 1, wherein:

The shielding member has a semi-cylindrical wall structure and is arranged outside at least a part of the outer peripheral surface of the scroll assembly corresponding to the air inlet.
The compressor of claim 1, wherein:

The shielding member is made of metal material or non-metal material.
The compressor according to any one of claims 1 to 7, further comprising: a bracket (4);

Wherein, the shielding member further includes an edge portion (831), the edge portion is opened with a through hole (833), and the shielding member is fixed to the bracket through the edge portion.
The compressor of claim 8, wherein:

Notches (832, 832') are opened on the edge.
The compressor of claim 8, said motor further comprising:

a stator (72) and a rotor (71), said stator being in said frame;

The outer periphery of the stator includes a flange (721);

Wherein, the through hole of the edge part and the flange edge (721) are sequentially fastened and fitted to the bracket by a fastener so as to fix the shielding member and the stator to the stand.
The compressor of claim 10, wherein:

The first scroll (11) includes a first end plate and a first scroll wrap protruding from the first end plate in a first direction (D1);

The second scroll (12) includes a second end plate and a second scroll protruding from the second end plate in a second direction (D2) opposite to the first direction, the second scroll and the second scroll a scroll wrap cooperates to form said compression pocket; and

The support (4) is located on a side of the second scroll far away from the first scroll;

Wherein, the compressor further includes a driving member (3), which is rotatably mounted on the bracket and located on the side of the second scroll away from the first scroll, and the rotor of the motor passes through The driving member drives the first scroll to rotate, and the first scroll drives the second scroll to rotate.
The compressor of claim 11, wherein:

The first end plate of the first scroll further includes an outer edge portion (111), the orthographic projection of the shielding member on the first end plate is located on the outer edge portion, and the shielding member There is a first gap (G1) between the component and the outer edge; wherein, the compressor further includes:

A first refrigerant flow path (F1), along which refrigerant enters the compression chamber from the intake port through the first gap.
The compressor of claim 10, wherein:

There is a second gap (G2) between the housing and the motor;

Wherein, the compressor further includes:

A second refrigerant flow path (F2), along which refrigerant enters the compression chamber from the intake port through the second gap.
The compressor of claim 11, wherein:

A hollow channel is formed in the driving part, and a fixed shaft (5) fixed to the bracket is arranged in the hollow channel, the fixed shaft has a transverse through hole (85), and the oiling bolt (81) is arranged on the in the axial bore of the fixed shaft and connected to the second scroll;

Wherein, the compressor further includes:

The first lubricating oil flow path (R1), along which lubricating oil flows from the oiling bolt through the axial inner hole and the transverse through hole into the lower end of the driving member and the between the brackets; and/or

The second lubricating oil flow path (R2), along which lubricating oil flows from the oiling bolt between the upper end of the driving member and the hub of the second scroll to lubricate plain bearings in between; and/or

The third lubricating oil flow path (R3), along which lubricating oil flows from the oiling bolt through the second end plate edge of the second scroll and flows into the A compression chamber between the scroll and the second scroll.