WO2020029561A1

WO2020029561A1 - Compressor and refrigeration apparatus

Info

Publication number: WO2020029561A1
Application number: PCT/CN2019/073421
Authority: WO
Inventors: 袁珊娜; 宋斌; 刘华; 高山; 吴远刚; 李衡国
Original assignee: 青岛海尔智能技术研发有限公司
Priority date: 2018-08-07
Filing date: 2019-01-28
Publication date: 2020-02-13
Also published as: CN109162898B; CN109162898A

Abstract

Disclosed are a compressor and a refrigeration apparatus. The compressor comprises a machine body, wherein the machine body is internally provided with a cylinder (3), and a piston mechanism and an oil storage part (5) which are arranged inside the cylinder (3); the piston mechanism comprises a piston head (41) and a piston rod (42); the oil storage part (5) is used for storing a lubricating fluid; an outer wall of the piston rod (42) is provided with a first oil storage tank (61); and the machine body is further provided with an oil suction line (7), with an oil suction end (71) of the oil suction line (7) being in communication with the oil storage part (5), and an oil discharge end (72) thereof being in communication with an inner wall of the cylinder (3). When the piston mechanism performs compression in a reciprocating motion in an axial direction of the cylinder (3), the oil discharge end (72) of the oil suction line (7) and the first oil storage tank (61) can be switched between a state in which same are in communication with each other and a state in which same are separated from each other. According to the compressor, by means of providing, in the piston mechanism, an oil storage tank and an oil suction line (7) in communication with the oil storage tank, when the compressor is in operation, the piston mechanism can be lubricated by a lubricating fluid that is automatically drawn under negative pressure generated during the reciprocating motion thereof, thereby simplifying the internal structure of the compressor and improving the stability of operation of the compressor.

Description

Compressor and refrigeration equipment

This application is based on a Chinese patent application with an application number of 201810891367.5 and an application date of August 07, 2018, and claims the priority of the Chinese patent application. The entire contents of the Chinese patent application are incorporated herein by reference.

Technical field

The present invention relates to the technical field of compressors, and in particular, to a compressor and refrigeration equipment.

Background technique

The linear compressor is a relatively commonly used compressor type in the mechanical field at present. Its body mainly includes a housing, an oil supply device and an electromagnet assembly, and the specific parts include a motor assembly, a cylinder, a piston, and an exhaust valve. Blades, movers, spring supporting components, motors, etc .; linear compressors have the advantages of high compression efficiency and small overall volume.

Linear compressors generally use the reciprocating motion of the piston mechanism to perform compression operations. Therefore, it is important for the long-term reliable operation of the linear compressor to facilitate the lubrication of the piston mechanism by lubricating fluid such as lubricating oil. The existing linear compressor mainly uses an independent oil pump device as the power supply for the lubricating oil. The disadvantages of this method of oil supply are mainly the following aspects: 1. Many components, high cost, poor production process and assembly; 2. the compressor The volume is large, the oil pump device takes up extra space of the compressor, and the utilization rate is low; 3. Poor reliability. The addition of the oil pump device may cause the problem of unstable operation of the compressor.

Summary of the invention

The present invention provides a compressor and refrigeration equipment, which aims to solve the above-mentioned disadvantages of the existing compressors that use an oil pump device to supply oil. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not a general overview, nor is it intended to identify key / important constituent elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of the present invention, a compressor is provided. The compressor includes a body. The body is provided with a cylinder, a driving module, a piston mechanism and an oil storage portion provided in the cylinder. The driving module is used to drive the piston mechanism along The axial direction of the cylinder performs a reciprocating compression movement. The piston mechanism includes a piston head and a piston rod, and an oil storage part is used to store a lubricating fluid;

The outer wall of the piston rod is provided with a first oil storage tank;

The body is also provided with an oil suction line. The oil suction end of the oil suction line communicates with the oil storage part, and the oil discharge end communicates with the inner wall of the cylinder. When the piston mechanism performs a reciprocating compression movement in the axial direction of the cylinder, the oil discharge line of the oil suction line The terminal and the first oil storage tank can be switched between the connected state and the separated state.

In an optional embodiment, the distance between the oil discharge end and the exhaust end of the compressor is not less than the distance between the piston head and the exhaust end when the piston mechanism moves to the maximum backward position.

In an optional implementation manner, the inner wall of the cylinder is provided with a second oil storage tank, and the drain end of the oil suction pipe is connected to the first oil storage tank.

In an optional embodiment, the distance between the second oil storage tank and the exhaust end of the compressor is not less than the distance between the piston head and the exhaust end when the piston mechanism moves to the maximum backward position.

In an optional implementation manner, the first oil storage tank is an annular groove opened along a circumferential direction of the piston rod;

The body is also provided with a first oil drain line, and the oil inlet end of the first oil drain line communicates with the inner wall of the cylinder, and when the piston mechanism performs a reciprocating compression movement in the axial direction of the cylinder, the first oil storage tank and the first oil drain line The oil inlet can be switched between the connected state and the separated state.

In an optional implementation manner, a distance in an axial direction of the cylinder between a side edge of the second oil storage tank adjacent to the oil inlet end and the oil inlet end is larger than a groove width of the first oil storage tank in the axial direction of the cylinder. .

In an optional implementation manner, the distance between the oil inlet end of the first oil discharge line and the exhaust end portion of the compressor is not less than the distance between the piston head and the exhaust end portion of the piston mechanism when the piston mechanism moves to the maximum backward position. .

In an optional embodiment, the inside of the piston rod is a hollow oil storage chamber, and the first oil storage tank is in communication with the oil storage chamber.

In an optional implementation manner, the body is further provided with a second oil discharge line, and the oil inlet end of the second oil discharge line is in communication with the oil storage cavity.

According to a second aspect of the present invention, there is also provided a refrigerating device, and the refrigerating device applies a compressor according to any one of the foregoing first aspects.

The beneficial effects of using the above technical solution of the present invention are:

The compressor provided by the present invention uses an oil storage tank in the piston mechanism and an oil suction pipeline connected to the oil storage tank, so that the compressor can use the negative pressure generated by its reciprocating motion to automatically extract lubricating fluid to lubricate the piston mechanism during operation without additional configuration. The oil pump device can realize automatic oil supply operation, which simplifies the internal structure of the compressor and improves the stability of the compressor operation.

It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and should not limit the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description serve to explain the principles of the present invention.

FIG. 1 is a schematic structural diagram of a compressor of the present invention according to an example;

FIG. 2 is a second structural schematic diagram of a compressor according to the present invention;

3 is an enlarged view of a portion A of FIG. 1;

4 is an enlarged view of a portion B of FIG. 2;

Among them, 1, the housing; 21, the mover; 22, the stator; 3, the cylinder; 31, the exhaust valve disc; 41, the piston head; 42, the piston rod; 5, the oil storage part; 61, the first oil storage tank; 7 Oil suction pipe; 71; Oil suction end; 72; Oil discharge end; 81; First oil discharge line; 82; Second oil discharge line; 9. Oil storage chamber.

detailed description

The following description and the drawings sufficiently illustrate specific embodiments of the present invention to enable those skilled in the art to practice them. Other implementations may include structural, logical, electrical, procedural, and other changes. The examples represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of the invention includes the entire scope of the claims, and all available equivalents of the claims. Herein, the embodiments may be individually or collectively represented by the term "invention", this is for convenience only, and if more than one invention is actually disclosed, it is not intended to automatically limit the scope of the application to any A single invention or inventive idea. In this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not require or imply any actual relationship between these entities or operations or order. Moreover, the terms "including," "including," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, or device that includes a series of elements includes not only those elements, but also other Elements, or elements that are inherent to such a process, method, or device. Without more restrictions, the elements defined by the sentence "including a ..." do not exclude the existence of other identical elements in the process, method or equipment including the elements. The embodiments in this document are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts between the embodiments, refer to each other. As for the method and product disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For the relevant part, refer to the description of the method.

FIG. 1 is a structural schematic diagram 1 of a compressor of the present invention according to an example, and the piston mechanism in FIG. 1 is at a maximum backward position; FIG. 2 is a structural schematic diagram 2 of a compressor of the present invention according to an example The piston mechanism in Figure 2 is in the maximum forward position. FIG. 3 is an enlarged view of part A of FIG. 1; FIG. 4 is an enlarged view of part B of FIG. 2.

As shown in FIG. 1 to FIG. 4, the present invention provides a compressor. The compressor includes a body. The body includes a casing 1 and a driving module provided inside the casing 1. The driving module is used to drive the piston mechanism along the cylinder 3. The reciprocating compression movement is performed in the axial direction; the driving module includes a stator 22 and a mover 21, and a cylinder 3 is formed on the center axis of the stator 22 and the mover 21, and a piston mechanism for reciprocating compression movement in the axial direction of the cylinder 3 is provided in the cylinder 3 One end of the cylinder 3 is an exhaust end. The exhaust end is provided with an exhaust valve disc 31 that can be opened and closed. The gas compressed by the piston mechanism can be discharged through the exhaust end when the exhaust valve disc 31 is opened.

The compressor of the present invention further includes an oil storage portion 5 for storing the lubricating fluid; in the figure, the bottom space of the inner cavity of the casing 1 of the compressor is the oil storage portion 5 for storing the lubricating fluid; here, The lubricating fluid includes, but is not limited to, conventional lubricating media such as lubricating oil, and the present invention does not limit the specific type of the lubricating fluid.

In this embodiment, the first wall of the piston rod 42 is provided with a first oil storage tank 61; the body is also provided with an oil suction line 7, the oil suction end 71 of the oil suction line 7 communicates with the oil storage portion 5, and the oil discharge end 72 communicates with The inner wall of the cylinder 3; when the piston mechanism performs a reciprocating compression movement in the axial direction of the cylinder 3, the oil discharge end 72 of the suction pipe 7 and the first oil storage tank 61 can be switched between the connected state and the separated state, as shown in the figure. 1 shows that the two are in a connected state, and FIG. 2 shows that the two are in a separated state.

In this embodiment, because the first oil storage tank 61 and the outer wall of the piston rod 42 are an integrated structure, the first oil storage tank 61 also reciprocates with the piston rod 42. Here, when the piston rod 42 moves backward to FIG. 1 In the position, the first oil storage tank 61 and the oil discharge end 72 of the suction pipe 7 communicate with each other. Because the air pressure in the tank space of the first oil storage tank 61 decreases, the first oil storage tank 61 and the oil storage unit can be used. The pressure difference between 5 makes the lubricating fluid in the oil storage part 5 can be sucked into the first oil storage tank 61 by negative pressure; after that, when the first oil storage tank 61 continues to move forward with the piston rod 42, the first oil storage tank 61 The communication area with the oil discharge end 72 of the suction pipe 7 is gradually reduced until the two are separated, and a part of the lubricating fluid in the first oil storage tank 61 is squeezed into the gap between the cylinder 3 and the piston rod 42 to Lubrication is performed, and the air pressure in the first oil storage tank 61 is lowered again due to the decrease of the lubricating fluid; therefore, the first oil storage tank 61 and the oil suction line 7 can be used to move the oil storage unit 5 through the reciprocating movement of the piston rod 42 The internal lubricating fluid is repeatedly drawn between the cylinder 3 and the piston rod 42 In the gap, the oil can be replenished without additional oil pump.

In this embodiment, the first oil storage tank 61 is an annular groove opened in the circumferential direction of the piston rod 42. In this way, the lubricating fluid entering the first oil storage tank 61 via the oil suction line 7 can be moved along the first oil storage tank 61. The annular flow allows the lubricating fluid to flow from the entire circumferential direction of the first oil storage tank 61 to the gap between the cylinder 3 and the piston rod 42 to ensure the uniformity of the lubricating fluid in the gap between the cylinder 3 and the piston rod 42. Improved lubrication effect.

In this embodiment, in order to avoid the problem that the lubricating fluid leaks from the oil discharge end 72 into the compression space between the piston head 41 and the exhaust valve disc 31 when the piston mechanism is retracted, and contaminates the compression medium, the oil discharged from the oil suction line 7 The opening position of the end 72 on the outer wall of the cylinder 3 should satisfy the distance between the oil discharge end 72 and the exhaust end of the compressor, not less than the distance between the piston head 41 and the exhaust end when the piston mechanism moves to the maximum retracted position; The compression space between the oil discharge end 72 of the oil suction line 7 and the piston head 41 and the exhaust valve disc 31 will not always contact and penetrate, which can effectively prevent the problem of leakage of the lubricating fluid.

Optionally, the inner wall of the cylinder 3 is provided with a second oil storage tank, and the oil discharge end 72 of the oil suction pipe 7 communicates with the first oil storage tank 61; in this way, when the piston mechanism of the compressor performs a reciprocating compression movement in the axial direction of the cylinder 3 At this time, the switching between the communication state and the separation state between the oil suction pipe 7 and the first oil storage tank 61 is actually realized by switching the communication state and the separation state between the first oil storage tank 61 and the second oil storage tank.

Here, when the piston rod 42 moves backward to a position where the first oil storage tank 61 and the second oil storage tank communicate with each other, the first oil storage tank 61 and the second oil storage tank communicate with each other, and the volume of the oil storage space jointly formed by the two increases. The change in the volume of space will also reduce the air pressure in the oil storage space, which can increase the pressure difference between the first oil storage tank 61 and the oil storage unit 5, and make the lubricating fluid in the oil storage unit 5 more convenient. It is sucked into the first oil storage tank 61 and the second oil storage tank by negative pressure; after that, when the first oil storage tank 61 continues to move forward with the piston rod 42, the communication area between the first oil storage tank 61 and the second oil storage tank gradually decreases. Until the two are separated, part of the lubricating fluid in the first oil storage tank 61 is squeezed into the gap between the cylinder 3 and the piston rod 42 to lubricate the two.

In this embodiment, in order to avoid the problem that the lubricating fluid leaks from the second oil storage tank into the compression space between the piston head 41 and the exhaust valve disc 31 when the piston mechanism is retracted, the second oil storage tank is in the cylinder 3 The opening position on the outer wall should satisfy the distance between the second oil storage tank and the exhaust end of the compressor, which is not less than the distance between the piston head 41 and the exhaust end when the piston mechanism moves to the maximum backward position. In this way, the compression space between the second oil storage tank and the piston head 41 and the exhaust valve disc 31 will never come in contact with each other, which can effectively prevent the problem of leakage of the lubricating fluid.

The body is also provided with a first oil discharge line 81, the oil inlet end of the first oil discharge line 81 is connected to the inner wall of the cylinder 3, and the oil outlet end of the first oil discharge line 81 is connected to the oil storage part 5; The lubricating fluid is transported back to the oil storage unit 5, and a circulation circuit of the lubricating fluid is formed between the oil storage unit 5, the oil suction pipe 7, the cylinder 3, and the first exhaust pipe, thereby realizing the reuse of the lubricating fluid.

When the piston mechanism performs a reciprocating compression movement in the axial direction of the cylinder 3, the communication state and the separation state of the first oil storage tank 61 and the oil inlet end of the first oil discharge pipe 81 can be switched between the two. Specifically, when the piston mechanism moves to the position shown in FIG. 2 (the piston mechanism moves to the maximum forward position), the oil inlet end communicates with the first oil storage tank 61. At this time, the first oil storage tank 61 and the first row The oil inlet end of the oil line 81 is in a connected state; when the piston mechanism moves to the position shown in FIG. 1, the first oil storage tank 61 and the oil inlet end of the oil discharge line are in a separated state.

In this way, when the piston mechanism moves to the position shown in FIG. 1, the first oil storage tank 61 and the oil suction line 7 (or the second oil storage tank) are in a connected state, and the inlets of the first oil storage tank 61 and the first oil discharge line 81 are connected. The oil end is in a separated state; and when the piston mechanism moves to the position shown in FIG. 2, the first oil storage tank 61 and the oil suction line 7 (or the second oil storage tank) are separated, and the first oil storage tank 61 and the oil discharge line The oil inlet is connected. It can prevent the oil suction line 7 and the first oil discharge line 81 from forming an interconnected flow path, which can ensure that the first oil storage tank 61 can form a sufficient negative pressure environment and avoid the first oil storage tank 61. The problem that the incoming lubricating fluid flows from the drain line back to the oil storage section 5 before being lubricated.

Therefore, between the opening position of the oil inlet end of the oil drain pipeline and the first oil storage tank 61, the oil drain end 72 (or the edge of the second oil storage tank adjacent to the oil inlet end of the second oil storage tank) and the oil inlet end of the oil suction pipeline 7 should be satisfied. The distance between the two in the axial direction of the cylinder 3 is larger than the groove width of the first oil storage tank 61 in the axial direction of the cylinder 3.

In this embodiment, the oil inlet end of the first oil discharge line 81 is opened near the exhaust valve plate 31, and the oil discharge end 72 (or the second oil storage tank) of the oil suction line 7 is opened away from the exhaust valve plate. 31 position.

At the same time, in order to avoid the problem that the compressed medium in the compression space between the piston head 41 and the exhaust valve disc 31 leaks through the oil inlet end of the first oil discharge line 81, the oil inlet end of the first oil discharge line 81 should also meet the The distance between the oil inlet end of an oil discharge line 81 and the exhaust end of the compressor is not less than the distance between the piston head 41 and the exhaust end when the piston mechanism moves to the maximum backward position.

Optionally, the inside of the piston rod 42 is a hollow structured oil storage chamber 9, and the oil storage chamber 9 extends along the radial direction of the piston rod 42. The oil storage chamber 9 can be used as a storage space for the lubricating fluid. The first oil storage tank 61 and The oil storage chamber 9 is communicated. In this way, the lubricating fluid sucked from the oil storage unit 5 by the first oil storage tank 61 can flow into and be stored in the oil storage chamber 9. During the reciprocating movement of the piston rod 42, the oil storage chamber 9 Part of the lubricating fluid flows out into the first oil storage tank 61 again, and flows into the gap between the cylinder 3 and the piston rod 42 through the first oil storage tank 61. In this way, the continuous oil supply operation for the piston rod 42 can be realized, and the entire There is always enough lubricating fluid to soften during the reciprocating compression movement.

Here, the body is also provided with a second oil discharge line 82. The oil inlet end of the second oil discharge line 82 is in communication with the oil storage chamber 9 and the oil output end is in communication with the oil storage section 5. There is an excessive amount of oil in the oil storage chamber 9. The lubricating fluid can be transported back to the oil storage unit 5 through the second oil discharge line 82 to avoid the problem of the piston rod 42 becoming heavier due to excessive lubricating fluid in the oil storage chamber 9. Optionally, the oil inlet end of the second oil discharge line 82 is disposed between the axis of the rear end portion of the oil storage cavity 9 and the bottom.

Optionally, the refrigeration equipment includes, but is not limited to, an air conditioner, a refrigerator, and the like.

It should be understood that the present invention is not limited to the processes and structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is only limited by the appended claims.

Claims

A compressor includes a body, and a cylinder, a driving module, a piston mechanism and an oil storage part provided in the cylinder are provided in the body, and the driving module is used to drive the piston mechanism along the cylinder. The axial direction of the cylinder performs a reciprocating compression motion, the piston mechanism includes a piston head and a piston rod, and the oil storage portion is used to store a lubricating fluid;

A first oil storage tank is provided on the outer wall of the piston rod;

The body is also provided with an oil suction line, the oil suction end of the oil suction line is in communication with the oil storage part, and the oil discharge end is in communication with the inner wall of the cylinder; the piston mechanism is along the axial direction of the cylinder When the reciprocating compression movement is performed, the oil discharge end of the oil suction line and the first oil storage tank can be switched between the communication state and the separation state of the two.
The compressor according to claim 1, wherein a distance between the oil discharge end and an exhaust end portion of the compressor is not less than a distance between a piston head and the piston head when the piston mechanism moves to a maximum backward position. Exhaust end spacing.
The compressor according to claim 1, wherein a second oil storage tank is provided on an inner wall of the cylinder, and the oil discharge end of the suction pipe is connected to the first oil storage tank.
The compressor according to claim 3, wherein a distance between the second oil storage tank and an exhaust end of the compressor is not less than a distance between a piston head and a piston head when the piston mechanism moves to a maximum retracted position. The pitch of the exhaust end is described.
The compressor according to claim 3, wherein the first oil storage tank is an annular groove opened in a circumferential direction of the piston rod;

The body is also provided with a first oil discharge line, and an oil inlet end of the first oil discharge line communicates with an inner wall of the cylinder, and when the piston mechanism performs a reciprocating compression movement in an axial direction of the cylinder, The first oil storage tank and the oil inlet end of the first oil discharge pipeline can be switched between the communication state and the separation state of the two.
The compressor according to claim 5, wherein:

A distance between an edge of a side of the second oil storage tank adjacent to the oil inlet end and the oil inlet end in an axial direction of the cylinder is larger than that of the first oil storage tank in an axial direction of the cylinder. Slot width.
The compressor according to claim 5, wherein a distance between the oil inlet end of the first oil discharge line and an exhaust end portion of the compressor is not less than a maximum backward movement of the piston mechanism The distance between the piston head and the exhaust end when in position.
The compressor according to claim 1 or 3, wherein the inside of the piston rod is a hollow oil storage chamber, and the first oil storage tank is in communication with the oil storage chamber.
The compressor according to claim 8, wherein the body is further provided with a second oil discharge line, and an oil inlet end of the second oil discharge line is in communication with the oil storage chamber.
A refrigeration equipment, characterized in that the refrigeration equipment uses the compressor according to any one of claims 1-9.