Insulation resistance connection structure and compressor

Abstract

This utility model provides an insulation resistance connection structure and a compressor. The insulation resistance connection structure includes a lead wire assembly extending from the stator, a terminal assembly disposed on the housing, and a connector connecting the lead wire assembly and the terminal assembly. The lead wire assembly includes a connecting terminal at its end, the terminal assembly includes a terminal body, and the connector includes a first sleeve portion and a second sleeve portion with telescopic flexibility. The first sleeve portion is fitted onto the terminal body, and the second sleeve portion is fitted onto the connecting terminal. This insulation resistance connection structure has a compact overall structure and is easy to assemble. The connector effectively isolates refrigerant, refrigeration oil, and other impurities, reducing contamination and rust on the connecting terminal and the terminal body. By covering the connecting terminal and the terminal body with the connector, current leakage to the compressor housing is effectively reduced, improving the compressor's insulation resistance.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and in particular to an insulation resistance connection structure and a compressor. Background Technology

[0002] Scroll compressors are widely used in air conditioning and heat pump systems due to their high efficiency, small size, and stable operation. During compressor operation, to ensure user safety and the reliability of the refrigeration or heating system, national and industry standards specify test conditions and standard limits for insulation resistance and leakage current for different compressor structures and motor types. The insulation resistance of a compressor is an indicator of its electrical insulation material's (between windings and between windings and the housing) ability to prevent current leakage. The insulation condition at the connection between the sealed terminals of the compressor housing components and the stator leads is crucial in limiting the compressor's insulation resistance. Currently, most scroll compressors use plastic terminals to connect the leads and sealed terminals.

[0003] With the application and development of scroll compressors, scroll compressors now use more than 100 types of refrigerants and various types of refrigeration oils. During the operation of scroll compressors, the following situations may lead to the risk of electrical conductivity: 1. Copper and iron filings generated by compressor wear can form conductive paths when mixed with liquid refrigerant and refrigeration oil; 2. Some refrigerants may decompose and produce conductive gases or liquids when the discharge pressure is too high; 3. Some refrigeration oils may contain conductive additives, which can make the refrigeration oil conductive.

[0004] Refrigerant and refrigeration oil easily adhere to the connection points between the compressor stator leads and the sealing terminals of the housing components. Therefore, the sealing performance at this location directly affects the compressor's insulation resistance. Currently, the commonly used plastic terminal connection method involves connecting the stator three-phase leads to the lower end of the plastic terminal. The three-phase leads are typically inserted into the plastic terminal, and conductivity is achieved through contact between the metal terminals at the ends of the leads and the internal metal tube of the plastic terminal. However, using plastic terminals has the following disadvantages: 1. The stator three-phase leads are inserted from the lower end of the terminal, resulting in a gap at the connection point; 2. There is a gap in the fit between the sealing terminal pin and the countersunk hole on the front of the terminal; 3. When the sealing terminal is installed on the front of the terminal, the countersunk hole cannot completely cover the bottom of the pin (near the housing side), resulting in partial pin exposure. The refrigerant and refrigeration oil in the compressor can easily flow in through these gaps and come into direct contact with the metal ends of the lead wires, the internal metal tubes of the terminals, and the pins of the terminals; this can cause the refrigerant or refrigeration oil to become energized and be transmitted to the housing, resulting in insulation resistance that does not meet standards and endangering personal safety; secondly, the connection between the terminals and the shaft holes of the terminals is a clearance fit, which is not strong enough. During long-term operation of the compressor at high amplitude or when the compressor is moved, the terminals are prone to falling off the terminals, causing the compressor to stop running due to a circuit break.

[0005] To address the issues of refrigerant and refrigeration oil easily seeping into the connection between the terminals and the posts, affecting insulation resistance and posing a risk of terminal detachment, an insulation resistance connection structure needs to be designed to solve these problems. Utility Model Content

[0006] In view of this, in order to overcome the defects of the prior art, this utility model provides an insulation resistance connection structure and compressor, which effectively solves the problem that the connection between the wiring terminal and the terminal post is easily soaked with refrigerant and refrigeration oil, which affects the insulation resistance and poses a risk of the wiring terminal falling off.

[0007] According to a first aspect of the present invention, an insulation resistance connection structure is provided for a compressor, the compressor including a stator and a housing, wherein the insulation resistance connection structure includes a lead wire assembly extending from the stator, a terminal assembly disposed in the housing, and a connector connecting the lead wire assembly and the terminal assembly; the lead wire assembly includes a connecting terminal disposed at an end, the terminal assembly includes a terminal body, and the connector includes a first sleeve portion and a second sleeve portion having telescopic properties, the first sleeve portion being sleeved on the terminal body, and the second sleeve portion being sleeved on the connecting terminal.

[0008] Preferably, there is an angle between the extended axis of the first sleeve portion and the extended axis of the second sleeve portion.

[0009] Preferably, the lead wire assembly further includes a lead wire harness, the two ends of which are respectively connected to the stator and the connection terminal.

[0010] Preferably, the terminal assembly further includes a fixing base and a fixing member, the fixing member passing through the fixing base, the terminal assembly passing through the fixing base into the tube housing, and the terminal body passing through the fixing member and disposed on the fixing base.

[0011] Preferably, the first sleeve portion is fitted onto the terminal body and part of the fixing member that pass through the fixing member, and the second sleeve portion is fitted onto the connecting terminal and part of the lead wire harness near the terminal body.

[0012] Preferably, there are multiple connection terminals and multiple terminal bodies, with each connection terminal and terminal body corresponding to the other, and the corresponding connection terminals and terminal bodies are connected by the connector.

[0013] Preferably, the connector is a heat shrink tubing.

[0014] Preferably, the connection terminal includes a terminal portion and a connection portion. The connection portion includes a first connection end and a second connection end. The end face of the first connection end is perpendicular to the end face of the second connection end. The first connection end faces the stator portion, and the second connection end faces the housing portion. The lead wire harness is disposed at the first connection end, and the terminal portion is disposed at the second connection end.

[0015] Preferably, the length of the first sleeve portion is greater than the length of the second sleeve portion.

[0016] According to a second aspect of the present invention, a compressor is provided, wherein the compressor includes the insulation resistance connection structure as described above.

[0017] According to the insulation resistance connection structure of this utility model, the direct connection between the connection terminal and the terminal body can be achieved through the cooperation of the lead wire assembly, the terminal assembly, and the connector, while ensuring the sealing and stability of the connection. This insulation resistance connection structure has a compact overall structure and is easy to assemble. The connector effectively isolates refrigerant, refrigeration oil, and other impurities, reducing contamination and rust on the connection terminal and terminal body. By covering the connection terminal and terminal body with the connector, current leakage to the compressor housing can be effectively reduced, improving the compressor's insulation resistance. It also reduces current dissipation between connections to prevent short circuits caused by pin-to-pin conduction, reduces phase-to-phase current interference, improves phase-to-phase current frequency stability, and lowers the risk of compressor shutdown due to connection detachment.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the compressor according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the stator section according to an embodiment of the present invention is shown; Figure 3 A top view of the tube shell portion according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of the terminal block assembly according to an embodiment of the present invention is shown; Figure 5 A partial structural schematic diagram of a compressor according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the terminal assembly and lead wire assembly according to an embodiment of the present invention is shown.

[0021] Reference numerals: 1-Stator section; 101-Stator core; 102-Stator winding; 2-Shell section; 3-Lead wire assembly; 301-Connecting terminal; 3011-Terminal section; 3012-First connecting end; 3013-Second connecting end; 302-Lead wire harness; 4-Terminal assembly; 401-Terminal body; 402-Fixing base; 403-Fixing component; 5-Connecting component; 501-First sleeve section; 502-Second sleeve section. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] According to a first aspect of this utility model, an insulation resistance connection structure is provided, such as... Figures 1 to 6 As shown, this insulation resistance connection structure is used for, for example Figure 1 The scroll compressor shown includes a stator section 1 and a housing section 2. The insulating resistance connection structure electrically connects the stator section 1 and the housing section 2 while ensuring sealing performance. This insulating resistance connection structure includes a lead wire assembly 3, a terminal assembly 4, and a connector 5.

[0027] In the following description, reference will be made to Figures 1 to 6 The detailed structure of the lead wire assembly 3, terminal assembly 4, and connector 5 of the insulation resistance connection structure is described in detail.

[0028] like Figure 3 As shown, in this embodiment, the lead wire assembly 3 is disposed on the stator section 1. The stator section 1 includes a stator core 101 and a stator winding 102 wound around the stator core 101. The lead wire assembly 3 is disposed at the end of the stator winding 102. Figure 4 As shown, in this embodiment, the terminal assembly 4 is disposed on the housing portion 2 and passes through the outer casing of the housing portion 2. For example... Figure 5 and Figure 6 As shown, in this embodiment, the connector 5 is used to connect the lead wire assembly 3 and the terminal assembly 4, so that the lead wire assembly 3 and the terminal assembly 4 can be directly connected, and the stability and sealing of the connection between the two are guaranteed, without the need for additional adapter components.

[0029] Specifically, the lead wire assembly 3 includes a connection terminal 301 disposed at the end of the lead wire assembly 3, and the terminal assembly 4 includes a terminal body 401. Both the end of the connection terminal 301 and the end of the terminal body 401 are formed as flat ends (e.g., ...). Figure 5 and Figure 6 As shown in the figure, the connection terminal 301 and the terminal body 401 can be directly connected without the need for additional adapter components to achieve conductive connection. At the same time, the connection can ensure a tight fit and avoid connection gaps.

[0030] The connector 5 includes a first sleeve portion 501 and a second sleeve portion 502 with telescopic flexibility. The first sleeve portion 501 is sleeved on the terminal body 401, and the second sleeve portion 502 is sleeved on the connecting terminal 301. Since both the first sleeve portion 501 and the second sleeve portion 502 of the connector 5 are telescopic, they can accommodate the shape of the connecting terminal 301 and the shape of the terminal body 401, and can fit tightly against the outer walls of both, allowing the connecting terminal 301 and the terminal body 401 to connect inside the connector 5. Because the connector 5 is sleeved on the connecting terminal 301 and the terminal body 401, it can isolate the connecting terminal 301 and the terminal body 401 from the outside, meeting the insulation resistance requirements. Furthermore, because the connecting terminal 301 and the terminal body 401 are fixed by the connector 5, the connecting ends can fit tightly against each other, ensuring the normal operation of the compressor.

[0031] This insulation resistance connection structure, through the cooperation of lead wire assembly 3, terminal assembly 4, and connector 5, enables direct connection between connection terminal 301 and terminal body 401, ensuring the sealing and stability of the connection. The overall structure is compact and easy to assemble. Connector 5 effectively isolates refrigerant, refrigeration oil, and other impurities, reducing contamination and rust on connection terminal 301 and terminal body 401. By covering connection terminal 301 and terminal body 401 with connector 5, current leakage to the compressor housing is effectively reduced, improving the compressor's insulation resistance. It also reduces current dissipation between connections to prevent short circuits caused by pin-to-pin conduction, reduces phase-to-phase current interference, improves phase-to-phase current frequency stability, and lowers the risk of compressor shutdown due to connection detachment, i.e., reducing the risk of current loop breakage caused by connection terminal 301 detaching from terminal body 401.

[0032] Preferably, such as Figure 5 As shown, in this embodiment, an angle is formed between the extended axis of the first sleeve portion 501 and the extended axis of the second sleeve portion 502. The angle can be from 90° to 180°. The angle formed between the extended axes of the first sleeve portion 501 and the second sleeve portion 502 facilitates the fitting of the connecting terminal 301 and the terminal body 401, and can also accommodate connecting terminals 301 and terminal bodies 401 of different shapes and specifications.

[0033] Preferably, in the embodiment, the cross-section of the connector 5 can be formed as a circle or a square.

[0034] Preferably, such as Figure 1 , Figure 5 and Figure 6 As shown, in this embodiment, the lead wire assembly 3 may further include a lead wire harness 302, with both ends of the lead wire harness 302 connected to the stator section 1 and the connecting terminal 301, respectively. The lead wire harness 302 extends from the end of the stator winding 102, and the end of the lead wire harness 302 is provided with the connecting terminal 301.

[0035] Preferably, such as Figure 3 , Figure 4 and Figure 6As shown, in this embodiment, the terminal assembly 4 may further include a mounting base 402 and a fixing member 403. The terminal assembly 4 is mounted on the housing of the tube housing 2 via the mounting base 402. The fixing member 403 is disposed inside the mounting base 402, with one end of the fixing member 403 passing through the outer wall of the mounting base 402. The terminal assembly 4 passes through the fixing member 403 to achieve fixation. The mounting base 402 may be made of metal materials such as iron or aluminum and is welded to the compressor housing. The fixing member 403 may be made of glass. Furthermore, to ensure the insulation resistance of the compressor, the live parts of the compressor are usually separated from the compressor housing. The fixing member 403 can effectively isolate the mounting base 402 from the terminal body 401.

[0036] Preferably, such as Figure 6 As shown in the embodiment, to ensure connection stability and avoid connection gaps, the first sleeve portion 501 is fitted onto the terminal body 401 passing through the fixing member 403 and a portion of the fixing member 403, and the second sleeve portion 502 is fitted onto the connecting terminal 301 and a portion of the lead wire harness 302 near the terminal body 401. It is understood that the first sleeve portion 501 and the second sleeve portion 502 of the connector 5 have sufficient fitting allowance and can respectively fit a portion of the fixing member 403 and a portion of the lead wire harness 302.

[0037] Preferably, such as Figure 1 and Figures 4 to 6 As shown, in this embodiment, there are multiple connection terminals 301 and multiple terminal bodies 401. Each connection terminal 301 corresponds to one terminal body 401, and the corresponding connection terminal 301 and terminal body 401 are connected by a connector 5. In another embodiment, there are three connection terminals 301 and three terminal bodies 401. Each corresponding connection terminal 301 and terminal body 401 is connected by a separate connector 5, which effectively strengthens the connection. Furthermore, the three lead wires 302 do not directly contact each other, reducing the risk of the lead wire assembly 3 detaching and causing the compressor to stop operating due to a circuit break.

[0038] Preferably, in this embodiment, the connector 5 can be heat shrink tubing. The heat shrink tubing is made of heat-shrinkable plastic, possessing excellent heat-shrinkability. After heat shrinking, it can completely cover the lead wire assembly 3 and the terminal assembly 4, and can adhere tightly to the surfaces of the lead wire assembly 3 and the terminal assembly 4, ensuring a tight seal. The heat shrink tubing also possesses insulation, durability, heat resistance, refrigerant resistance, and refrigeration oil resistance, and after heat shrinking, it retains a certain degree of elasticity, ensuring stable connection and use. When using heat shrink tubing to connect the lead wire assembly 3 and the terminal assembly 4, the heat shrink tubing will not release impurities under the high temperature and pressure environment inside the compressor, where refrigerant and refrigeration oil coexist.

[0039] Preferably, such as Figure 5 As shown, in this embodiment, the length of the first sleeve portion 501 is greater than the length of the second sleeve portion 502. Since the terminal block body 401 is longer than the connecting terminal 301 in this embodiment, the length of the first sleeve portion 501 needs to be greater than the length of the second sleeve portion 502 to accommodate the connection between the two.

[0040] Preferably, such as Figure 6 As shown, in this embodiment, the connecting terminal 301 may include a terminal portion 3011 and a connecting portion. Specifically, the terminal portion 3011 may be formed as a metal slit cylinder, with semi-circular metal plates on both sides of the slit having a certain opening, and the metal cylinder and the terminal body 401 may be in a transition fit.

[0041] Further, the connecting portion may include a first connecting end 3012 and a second connecting end 3013. The end face of the first connecting end 3012 is perpendicular to the end face of the second connecting end 3013. The first connecting end 3012 faces the stator portion 1, and the second connecting end 3013 faces the housing portion 2. A lead wire harness 302 is disposed at the first connecting end 3012, and a terminal portion 3011 is disposed at the second connecting end 3013. The terminal portion 3011 can be disposed at the second connecting end 3013 by means of a clamping plate. The position of the terminal portion 3011 and the second connecting end 3013 is not limited to the middle position shown in the figure; it can also be the lower or upper position, as long as connection can be achieved. In addition, for ease of connection, in this embodiment, the terminal portion 3011 is perpendicular to the connecting portion; however, it is not limited to this. Figure 6 The extended line of the axis in the left and right direction and the connecting part are in Figure 6 The extended lines of the left and right axes in the middle can form an angle between them, which can be from 70° to 150°.

[0042] In addition, in this embodiment, the terminal body 401 is formed into an elongated structure, and the end of the elongated structure near the connection terminal 301 can be bent in a direction that is easy to assemble, thereby making the whole assembly easy.

[0043] The assembly and use process of the insulation resistance connection structure is as follows: the first sleeve part 501 of the connector 5 covers the terminal body 401 and part of the fixing part 403, the second sleeve part 502 of the connector 5 is sleeved on the connection terminal 301 and part of the lead wire harness 302, and then hot air is introduced to make the connector 5 fit against the surface of the connection, so as to isolate the refrigerant, refrigeration oil and other impurities, and improve the insulation resistance of the compressor.

[0044] During compressor operation, external power is input through the terminal body 401 of the terminal assembly 4. Current is transmitted through the terminal body 401 to the connection terminal 301 of the lead wire assembly 3, and then through the connection terminal 301 to the lead wire harness 302. The enameled wire of the lead wire harness 302 is integrated with the stator winding 102 of the stator section 1. The stator winding 102 wound on the stator core 101 generates a magnetic field, which drives the rotor section containing magnetic elements and the drive shaft fixedly connected to the rotor section to rotate at high speed. The shaft connecting component and the oil pump pump oil from the refrigerant oil pump of the lower housing component as the drive shaft rotates at high speed. The refrigerant oil rises to the upper part of the frame through the internal oil passage of the drive shaft, and then flows back to the lower housing component along the gap between the frame and the housing. During compressor operation, the refrigerant is in a high-pressure state and fills the entire compressor cavity.

[0045] This insulation resistance connection structure, through the cooperation of lead wire assembly, terminal assembly, and connector, enables direct connection between the connection terminals and the terminal body, ensuring the sealing and stability of the connection. The overall structure is compact and easy to assemble. The connector effectively isolates refrigerant, refrigeration oil, and other impurities, reducing contamination and rust on the connection terminals and terminal bodies. By covering the connection terminals and terminal bodies with the connector, current leakage to the compressor housing is effectively reduced, improving the compressor's insulation resistance. It also reduces current dissipation between connections to prevent short circuits caused by pin-to-pin conduction, reduces phase-to-phase current interference, improves phase-to-phase current frequency stability, and lowers the risk of compressor shutdown due to connection detachment.

[0046] In addition, such as Figure 1 As shown, a compressor is provided according to a second aspect of the present invention, the compressor including the insulation resistance connection structure as described above. During use, the compressor's insulation resistance can be increased by installing the insulation resistance connection structure.

[0047] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. An insulation resistance connecting structure for a compressor including a stator portion and a tube portion, characterized by, The insulation resistance connection structure includes a lead wire assembly extending from the stator, a terminal assembly disposed on the housing, and a connector connecting the lead wire assembly and the terminal assembly; The lead wire assembly includes a connection terminal disposed at the end, the terminal assembly includes a terminal body, and the connector includes a first sleeve portion and a second sleeve portion with telescopic properties, the first sleeve portion being sleeved on the terminal body, and the second sleeve portion being sleeved on the connection terminal.

2. The insulation resistance connection structure according to claim 1, characterized in that, An angle is formed between the extended axis of the first sleeve section and the extended axis of the second sleeve section.

3. The insulation resistance connection structure according to claim 1, characterized in that, The lead wire assembly also includes a lead wire harness, the two ends of which are respectively connected to the stator and the connection terminal.

4. The insulation resistance connection structure according to claim 3, characterized in that, The terminal assembly further includes a fixing base and a fixing member. The fixing member passes through the fixing base, and the terminal assembly passes through the fixing base into the tube shell. The terminal body passes through the fixing member and is disposed on the fixing base.

5. The insulation resistance connection structure according to claim 4, characterized in that, The first sleeve is fitted onto the terminal body and part of the fixing member that pass through the fixing member, and the second sleeve is fitted onto the connecting terminal and part of the lead wire harness near the terminal body.

6. The insulation resistance connection structure according to claim 1, characterized in that, The number of connection terminals and the number of terminal bodies are multiple, and the multiple connection terminals and the multiple terminal bodies are arranged in a one-to-one correspondence. The corresponding connection terminals and the terminal bodies are connected by the connectors.

7. The insulation resistance connection structure according to claim 1, characterized in that, The connector is a heat shrink tubing.

8. The insulation resistance connection structure according to claim 3, characterized in that, The connection terminal includes a terminal portion and a connection portion. The connection portion includes a first connection end and a second connection end. The end face of the first connection end is perpendicular to the end face of the second connection end. The first connection end faces the stator portion, and the second connection end faces the housing portion. The lead wire harness is disposed at the first connection end, and the terminal portion is disposed at the second connection end.

9. The insulation resistance connection structure according to claim 1, characterized in that, The length of the first sleeve section is greater than the length of the second sleeve section.

10. A compressor, characterized in that, The compressor includes the insulation resistance connection structure according to any one of claims 1 to 9.

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