Threading sealing structure and compressor

Abstract

The utility model relates to the technical field of heating and ventilation, and provides a threading sealing structure and a compressor. An avoiding hole is formed in a shell of the compressor, the binding post extends out of an inner cavity of the shell from the avoiding hole, and the threading sealing structure is sealed with the shell on the peripheral side of the avoiding hole. The wiring box cover sealed by threading and the shell are relatively fixed and form an accommodating space, and the wiring harness and the binding post are connected in the accommodating space; the sealing element is at least partially clamped between the junction box cover and the shell, the sealing element is provided with a first through hole, the first through hole comprises a first sealing section and a second sealing section, and the first sealing section deforms under the acting force of the junction box cover; the threading sheath wraps the peripheral side of the wire harness, the threading sheath is arranged in the first through hole in a penetrating mode and is in interference fit with the sealing piece, and the extrusion force borne by the threading sheath on the first sealing section is larger than the extrusion force borne by the threading sheath on the second sealing section. In this way, sealing of the containing space is enhanced, and moisture or dust in the air is prevented from entering the shell to cause short circuit of the compressor.

Description

Technical Field

[0001] The utility model relates to the technical field of heating and ventilation, in particular to a threading sealing structure and a compressor. Background Art

[0002] The compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It sucks low-temperature, low-pressure refrigerant gas from the suction pipe, compresses it through the motor, and discharges high-temperature, high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.

[0003] Generally, a motor, a crankshaft and a compression mechanism are arranged in the shell of the compressor. The output end of the motor drives the compression mechanism to work through the crankshaft, and the motor is connected to the power harness through the terminal to obtain energy. The terminal needs to have a self-avoidance hole that penetrates the shell, and the setting of the avoidance hole causes the inner cavity of the shell to be connected to the outside. The suction force generated when the crankshaft and the compression mechanism are started makes the air outside the shell always tend to enter the shell through the avoidance hole, and the static electricity generated when the motor is started is easy to absorb dust in the air, causing the motor to short-circuit.

[0004] Therefore, there is an urgent need for a threading sealing structure and a compressor to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a wire threading sealing structure and a compressor, which can form a closed space around the terminal to prevent moisture or dust in the air from entering the shell and causing a short circuit in the compressor.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A threading sealing structure is used for a compressor external wiring harness. The compressor comprises a housing and a terminal. The terminal extends from an inner cavity of the housing and is used to connect to the wiring harness. The threading sealing structure comprises:

[0008] A junction box cover, the junction box cover is fixed relative to the housing and forms an accommodation space, and the wiring harness and the terminal are connected in the accommodation space;

[0009] A sealing member, wherein the sealing member is at least partially sandwiched between the junction box cover and the housing, the sealing member is provided with a first through hole, the first through hole includes a first sealing section and a second sealing section, and the first sealing section is deformed under the force of the junction box cover;

[0010] A threading sheath, the threading sheath is wrapped around the outer peripheral side of the wiring harness, the threading sheath is passed through the first through hole and is interference fit with the sealing member, and the extrusion force applied to the threading sheath in the first sealing section is greater than the extrusion force applied to the threading sheath in the second sealing section.

[0011] As a preferred technical solution of the above-mentioned threading sealing structure, the above-mentioned junction box cover is provided with a mounting groove, and the opening of the above-mentioned mounting groove in its depth direction is formed on the end surface of the above-mentioned junction box cover. The above-mentioned sealing member includes a first sealing portion, and the above-mentioned first sealing portion is inserted in the above-mentioned mounting groove and has an interference fit with the above-mentioned junction box cover, and the above-mentioned first through hole is provided in the above-mentioned first sealing portion.

[0012] As a preferred technical solution of the threading sealing structure, the first sealing portion is provided with a first plug-in groove, and the peripheral side wall of the installation groove is inserted into the first plug-in groove and has an interference fit with the first sealing portion.

[0013] As a preferred technical solution of the threading sealing structure, the installation groove is opened in a door shape, including two parallel side walls and a bottom wall connecting the two side walls.

[0014] As a preferred technical solution of the threading sealing structure, the sealing member further comprises a second sealing portion, the first sealing portion is connected to the second sealing portion, and the second sealing portion is sandwiched between the opening side end surface of the mounting groove and the shell.

[0015] As a preferred technical solution of the threading sealing structure, the second sealing portion includes a second plug-in slot, the opening side end surface of the installation slot is plugged into the second plug-in slot, and the junction box cover is interference fit with the second sealing portion.

[0016] As a preferred technical solution of the threading sealing structure, a guide surface is provided at the inlet end of the first through hole, and the threading sheath can enter the first through hole along the guide surface.

[0017] As a preferred technical solution of the threading sealing structure, it also includes a blocking piece, which is clamped between the threading sheath and the guide surface to form an interference fit.

[0018] As a preferred technical solution of the threading sealing structure, it also includes a sealing gasket, which is fixed to the shell and clamped between the sealing member and the shell.

[0019] A compressor is also provided, comprising the above-mentioned shell, terminal posts and the above-mentioned threading sealing structure, wherein the above-mentioned shell is provided with an avoidance hole, the above-mentioned terminal posts extend out from the inner cavity of the above-mentioned shell through the above-mentioned avoidance hole, and the above-mentioned threading sealing structure is sealed with the above-mentioned shell on the peripheral side of the above-mentioned avoidance hole.

[0020] Beneficial effects of the utility model:

[0021] The present application provides a threading sealing structure and a compressor, wherein the threading sealing structure includes a junction box cover, a sealing member and a threading sheath. The junction box cover is relatively fixed to the shell and forms a storage space, and the wiring harness is connected to the terminal in the storage space; the sealing member is at least partially sandwiched between the junction box cover and the shell, and the sealing member is provided with a first through hole, and the first through hole includes a first sealing section and a second sealing section, and the first sealing section is deformed under the action of the junction box cover; the threading sheath is wrapped around the outer peripheral side of the wiring harness, the threading sheath is passed through the first through hole and has an interference fit with the sealing member, and the extrusion force received by the threading sheath in the first sealing section is greater than the extrusion force received by the threading sheath in the second sealing section. In this way, the sealing member is used to seal the connection between the junction box cover and the shell, and has a first through hole, the wiring harness is passed through the threading sheath, and the threading sheath penetrates into the storage space through the first through hole, so that the wiring harness can be connected to the terminal, and the threading sheath has an interference fit with the sealing member in the first through hole, so as to achieve sealing between the threading sheath and the sealing member. Furthermore, the junction box cover squeezes the first sealing section of the seal, so that the peripheral side walls of the first through hole and the first sealing section are deformed and approach each other, and further approach the threading sheath. During the assembly process, the installation of the junction box cover is completed, and the sealing of the connection between the threading sheath and the seal is strengthened. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0023] Figure 1 The utility model embodiment provides a seal and a junction box cover separation state schematic diagram Figure 1 ;

[0024] Figure 2 The plug-in state diagram of the sealing member and the junction box cover provided by the embodiment of the utility model is shown in FIG. Figure 1 ;

[0025] Figure 3 The utility model provides a sealing member and a threading sheath assembly schematic diagram Figure 1 ;

[0026] Figure 4 The utility model provides a sealing member and a threading sheath assembly schematic diagram Figure 2 ;

[0027] Figure 5 The utility model embodiment provides a seal and a junction box cover separation state schematic diagram Figure 2 ;

[0028] Figure 6 It is a side view of the sealing member and the junction box cover provided by the embodiment of the utility model in a separated state;

[0029] Figure 7 The plug-in state diagram of the sealing member and the junction box cover provided by the embodiment of the utility model is shown in FIG. Figure 2 ;

[0030] Figure 8 It is a side view of the plugged connection state of the sealing member and the junction box cover provided by the embodiment of the utility model.

[0031] In the figure:

[0032] 110, wiring harness; 120, housing; 130, terminal;

[0033] 200, junction box cover; 210, accommodation space; 220, installation slot;

[0034] 300, sealing member; 310, first through hole; 311, first sealing section; 312, second sealing section; 320, first sealing portion; 321, first plug-in slot; 330, second sealing portion; 331, second plug-in slot;

[0035] 400, a threading sheath; 410, a second through hole. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] like Figures 1 to 8 As shown, the utility model provides a compressor, including a shell 120, a terminal 130 and a threading sealing structure. The shell 120 is provided with an avoidance hole, and the terminal 130 extends from the inner cavity of the shell 120 through the avoidance hole. The threading sealing structure is sealed with the shell 120 on the side of the avoidance hole. Specifically, a motor, a crankshaft and a compression mechanism are arranged in the shell 120 of the compressor. The output end of the motor drives the compression mechanism to work through the crankshaft, and the motor is connected to the power harness 110 through the terminal 130 to obtain energy. The terminal 130 needs to penetrate the shell 120 through the avoidance hole, and the setting of the avoidance hole causes the inner cavity of the shell 120 to be connected with the outside. The suction force generated when the crankshaft and the compression mechanism are started makes the air outside the shell 120 always have a tendency to enter the shell 120 through the avoidance hole, and the static electricity generated when the motor is started is easy to absorb dust entrained in the air, causing a short circuit fault of the motor. Therefore, a threading sealing structure is arranged at the avoidance hole to seal the avoidance port.

[0041] Specifically, the threading sealing structure includes a junction box cover 200, a sealing member 300 and a threading sheath 400. The junction box cover 200 is relatively fixed to the housing 120 to form an accommodating space 210, and the wiring harness 110 and the terminal 130 are connected in the accommodating space 210; the sealing member 300 is at least partially sandwiched between the junction box cover 200 and the housing 120, and the sealing member 300 is provided with a first through hole 310, and the first through hole 310 includes a first sealing section 311 and a second sealing section 312, and the first sealing section 311 is deformed under the action of the junction box cover 200; the threading sheath 400 is wrapped around the outer peripheral side of the wiring harness 110, the threading sheath 400 is inserted into the first through hole 310 and has an interference fit with the sealing member 300, and the extrusion force on the threading sheath 400 in the first sealing section 311 is greater than the extrusion force on the threading sheath 400 in the second sealing section 312. In this way, the seal 300 is used to seal the connection between the junction box cover 200 and the shell 120, and a first through hole 310 is opened. The wiring harness 110 is passed through the wiring sheath 400, and the wiring sheath 400 penetrates into the accommodating space 210 through the first through hole 310, so that the wiring harness 110 can be connected to the terminal 130. The wiring sheath 400 has an interference fit with the seal 300 in the first through hole 310, thereby achieving sealing between the wiring sheath 400 and the seal 300.

[0042] Furthermore, when the threading sealing structure is assembled with the shell 120, the wiring harness 110 is passed through the second through hole 410 of the threading sheath 400, the threading sheath 400 is first inserted into the seal 300, and then the seal 300 is placed at the connection position between the shell 120 and the junction box cover 200, and the junction box cover 200 is installed. The junction box cover 200 squeezes the first sealing section 311 of the seal 300, so that the first through hole 310 and the surrounding side walls of the first sealing section 311 are deformed and approach each other, and further approach the threading sheath 400. During the assembly process, the installation of the junction box cover 200 is completed, and the sealing of the threading sheath 400 at the connection with the seal 300 is strengthened.

[0043] Optionally, the junction box cover 200 is provided with a mounting groove 220, the opening of the mounting groove 220 in the depth direction thereof is formed on the end surface of the junction box cover 200, the sealing member 300 includes a first sealing portion 320, the first sealing portion 320 is inserted into the mounting groove 220, and is interference-fitted with the junction box cover 200, and the first through hole 310 is provided in the first sealing portion 320. In this way, through the plug-in fit of the first sealing portion 320 and the mounting groove 220, the relative position of the junction box cover 200 and the first sealing portion 320 is not easily changed, the junction box cover 200 can be accurately pressed on the first through hole 310, and the first sealing section 311 is formed in the first through hole 310, and through the interference fit between the junction box cover 200 and the sealing member 300, the sealing of the accommodating space 210 is enhanced.

[0044] Optionally, the first sealing portion 320 is provided with a first inserting groove 321 , and the peripheral side wall of the installation groove 220 is inserted into the first inserting groove 321 and is interference-fitted with the first sealing portion 320 .

[0045] Specifically, when installing the junction box cover 200, the first sealing portion 320 of the seal 300 enters the installation groove 220, and at the same time, the side wall of the installation groove 220 is also inserted into the first plug-in groove 321 of the seal 300. Through plug-in cooperation, the seal is strengthened, and the first plug-in groove 321 can limit the displacement of the junction box cover 200 relative to the seal 300 except for the plug-in direction.

[0046] Optionally, the mounting groove 220 is formed in a door shape, including two parallel side walls and a bottom wall connecting the two side walls. Specifically, the two parallel side walls of the mounting groove 220 are consistent with the mounting direction of the junction box cover 200 and the housing 120, so that when the junction box cover 200 and the housing 120 are assembled, the side walls of the mounting groove 220 can be plugged into the first plugging groove 321.

[0047] Optionally, the sealing member 300 further includes a second sealing portion 330, the first sealing portion 320 is connected to the second sealing portion 330, and the second sealing portion 330 is sandwiched between the opening side end surface of the mounting groove 220 and the housing 120. In this way, the sealing member 300 completes the complete sealing of the gap between the junction box cover 200 and the housing 120 through the first sealing portion 320 and the second sealing portion 330, further strengthening the sealing performance of the accommodating space 210.

[0048] Optionally, the second sealing portion 330 includes a second plug-in groove 331, the opening side end surface of the installation groove 220 is plugged into the second plug-in groove 331, and the junction box cover 200 is interference-fitted with the second sealing portion 330. In this way, through the plug-in fit, a labyrinth seal structure is formed between the junction box cover 200 and the seal 300, which further strengthens the sealing of the accommodating space 210, and the contact area between the junction box cover 200 and the seal 300 is increased, and the interference fit makes the connection between the junction box cover 200 and the seal 300 more stable.

[0049] Optionally, a guide surface is provided at the inlet end of the first through hole 310, and the threading sheath 400 can enter the first through hole 310 along the guide surface. Specifically, the side of the first through hole 310 facing away from the accommodating space 210 is its inlet end, and the inlet end is in a bell-mouth shape by providing the guide surface, that is, the diameter of the side close to the accommodating space 210 is smaller than the diameter of the other side. In this way, the provision of the guide surface expands the opening size of the inlet end of the first through hole 310, making it easier for the threading sheath 400 to align with the first through hole 310 along the guide surface.

[0050] Optionally, a blocking piece is further included, which is sandwiched between the threading sheath 400 and the guide surface to form an interference fit. In this way, after the threading sheath 400 is inserted into the first through hole 310 through the guide surface, the gap between the guide surface and the threading sheath 400 is further filled by the blocking piece.

[0051] Furthermore, the plugging piece can undergo elastic deformation, and the plugging piece is sleeved outside the threading sheath 400, and can slide relative to the threading sheath 400 along the axial direction of the threading sheath 400. When the threading sheath 400 and the sealing member 300 are assembled, a part of the threading sheath 400 is first inserted into the first through hole 310, so that the wiring harness 110 can be connected to the terminal 130, and then the plugging piece is slid along the axial direction of the threading sheath 400 toward the side where the sealing member 300 is located, until the plugging piece abuts between the guide surface and the threading sheath 400, and an interference fit is formed. In this way, the plugging piece not only further seals the sealing member 300 and the threading sheath 400, but also undergoes inward elastic deformation when the plugging piece abuts against the guide surface, causing compression on the threading sheath 400, so as to limit the displacement of the threading sheath 400 relative to the sealing member 300.

[0052] Optionally, a sealing gasket is further included, which is fixed to the housing 120 and sandwiched between the sealing member 300 and the housing 120. In this way, when the junction box cover 200 is pressed against the housing 120, the sealing member 300 and the sealing member 300 are both elastically deformed to fill the gap between the sealing member 300 and the sealing gasket, and the other side of the sealing gasket is fixed to the housing 120, so that the sealing of the accommodating space 210 is further enhanced.

[0053] Preferably, the diameter of the first through hole 310 is φD1, the outer diameter of the first through hole 310 is φD2, the diameter of the guide surface at the inlet end of the first through hole 310 is φD3, and the outer diameter of the threading sheath 400 is φD4. φD1<φD4<φD3<φD2 is satisfied.

[0054] Preferably, the included angle between the conductor plane and the axis of the first through hole 310 is α, satisfying α<90°

[0055] Preferably, the contact length between the first sealing portion 320 and the housing 120 in the axial direction of the first through hole 310 is T1, and the axial length of the first through hole 310 excluding the guide surface portion is L1, which satisfies L1>T1.

[0056] Preferably, when the threading sheath 400 and the sealing member 300 are assembled, the aperture of the first through hole 310 is φD1′, and the outer diameter of the first through hole 310 is φD2′, satisfying φD1′>φD1, φD2′>φD2.

[0057] Preferably, when the junction box cover 200 and the sealing member 300 are assembled, the width of the mounting groove 220 is set to 2*R1, satisfying 2*R1<φD2′.

[0058] Preferably, when the junction box cover 200 and the sealing member 300 are assembled, the diameter of the first sealing section 311 of the first through hole 310 is φD1″, and the outer diameter of the first through hole 310 is φD2″, satisfying φD1″<φD1′, φD2″<φD2′.

[0059] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A wire threading sealing structure, used for a compressor external wiring harness (110), the compressor comprising a housing (120) and a terminal (130), the terminal (130) extending from an inner cavity of the housing (120) and used for connecting to the wiring harness (110), characterized in that: The threading sealing structure comprises: A junction box cover (200), the junction box cover (200) is relatively fixed to the housing (120) and forms a receiving space (210), and the wiring harness (110) and the terminal (130) are connected in the receiving space (210); A sealing member (300), wherein the sealing member (300) is at least partially sandwiched between the junction box cover (200) and the housing (120), the sealing member (300) is provided with a first through hole (310), the first through hole (310) comprises a first sealing section (311) and a second sealing section (312), and the first sealing section (311) is deformed under the action of the junction box cover (200); A wire threading sheath (400), the wire threading sheath (400) is wrapped around the outer peripheral side of the wire harness (110), the wire threading sheath (400) is inserted into the first through hole (310) and is interference fit with the sealing element (300), and the extrusion pressure on the wire threading sheath (400) in the first sealing section (311) is greater than the extrusion pressure on the wire threading sheath in the second sealing section (312).

2. The threading sealing structure according to claim 1, characterized in that: The junction box cover (200) is provided with a mounting groove (220), the opening of the mounting groove (220) in the depth direction is formed on the end surface of the junction box cover (200), the sealing member (300) comprises a first sealing portion (320), the first sealing portion (320) is inserted into the mounting groove (220) and is interference fit with the junction box cover (200), and the first through hole (310) is provided in the first sealing portion (320).

3. The threading sealing structure according to claim 2, characterized in that: The first sealing portion (320) is provided with a first inserting groove (321), and the peripheral side wall of the installation groove (220) is inserted into the first inserting groove (321) and is interference-fitted with the first sealing portion (320).

4. The threading sealing structure according to claim 2, characterized in that: The installation groove (220) is opened in a door shape and comprises two parallel side walls and a bottom wall connecting the two side walls.

5. The threading sealing structure according to claim 2, characterized in that: The sealing member (300) further comprises a second sealing portion (330), the first sealing portion (320) being connected to the second sealing portion (330), and the second sealing portion (330) being sandwiched between the opening side end surface of the mounting groove (220) and the housing (120).

6. The threading sealing structure according to claim 5, characterized in that: The second sealing portion (330) comprises a second plugging groove (331), the opening side end surface of the installation groove (220) is plugged into the second plugging groove (331), and the junction box cover (200) is interference fit with the second sealing portion (330).

7. The threading sealing structure according to claim 1, characterized in that: The inlet end of the first through hole (310) is provided with a guide surface, and the threading sheath (400) can enter the first through hole (310) along the guide surface.

8. The threading sealing structure according to claim 7, characterized in that: It also comprises a blocking piece, which is clamped between the threading sheath (400) and the guide surface to form an interference fit.

9. The threading sealing structure according to claim 1, characterized in that: It also includes a sealing gasket, which is fixed to the shell (120) and sandwiched between the sealing element (300) and the shell (120).

10. A compressor, characterized in that It comprises the shell (120), the terminal (130) and the threading sealing structure as described in any one of claims 1 to 9, the shell (120) is provided with an avoidance hole, the terminal (130) extends from the inner cavity of the shell (120) through the avoidance hole, and the threading sealing structure is sealed with the shell (120) on the peripheral side of the avoidance hole.

Images