Compressor

Abstract

The utility model relates to the technical field of fluid machinery, and discloses a compressor, which comprises an end plate, a first through hole, a second through hole, a second through hole and a third through hole, the nut is welded on the end plate; the terminal box is a box body with a lower opening, the terminal box is arranged on the end plate and forms an accommodating space with the end plate, the wiring terminal is located in the accommodating space, a second through hole communicated with the accommodating space is formed in the outer wall of the terminal box, a connecting part is further arranged on the outer wall of the terminal box, and a first connecting hole penetrating through the connecting part is further formed in the connecting part; the bolt penetrates through the first connecting hole and is connected with the nut; a gasket is disposed between the terminal box and the end plate, and the terminal box abuts against the gasket to force the gasket to deform. According to the compressor provided by the utility model, the situation that the safety of a system is influenced by fire and explosion caused by refrigerant leakage in the surrounding environment is prevented, meanwhile, the wiring terminal can be waterproof and dustproof, and refrigerant leaked from a system outside the terminal box can be prevented from entering the terminal box.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid machinery, in particular to a compressor. Background Art

[0002] At present, the refrigerant used in some compressors is flammable and explosive gas. A terminal box is provided on the compressor to accommodate wiring terminals, but the terminal box itself has poor sealing performance, and there is a possibility that the refrigerant leaked at the wiring terminals enters the external environment from inside the terminal box. When the refrigerant leaves the terminal box and enters the external environment, it is prone to the risk of fire or even explosion, affecting the safety of the external environment. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a compressor, which can improve the sealing performance of the terminal box, isolate the refrigerant gas leaked at the wiring terminals from the outside of the terminal box, and prevent the surrounding environment from catching fire and exploding due to refrigerant leakage, thus affecting the safety of the system.

[0004] To achieve the above purpose, the utility model provides a compressor, comprising:

[0005] A housing, on the surface of which a glass terminal is provided. The glass terminal includes a base plate and a wiring terminal. The base plate is arranged on the housing, and the wiring terminal extends out of the base plate.

[0006] An end plate, having a first through hole. The end plate is sleeved outside the base plate through the first through hole, and the end plate is welded to the housing.

[0007] A nut, welded to the end plate.

[0008] A terminal box, which is a box body with an open bottom. The terminal box is arranged on the end plate and forms an accommodating space with the end plate. The wiring terminal is located in the accommodating space. A second through hole communicating with the accommodating space is provided on the outer wall of the terminal box. The second through hole is used to connect a gland. A connecting portion is further provided on the outer wall of the terminal box, and a first connecting hole penetrating through the connecting portion is further provided on the connecting portion.

[0009] A bolt, passing through the first connecting hole and connecting with the nut.

[0010] A gasket, arranged between the terminal box and the end plate. The terminal box abuts against the gasket to force the gasket to deform.

[0011] Wherein, the distance between the connecting portion and the bottom of the terminal box is recorded as A mm, the thickness of the gasket is B mm, and the thickness of the nut is C mm, satisfying: A > 0.2 and C - B + B * 0.1 ≤ A ≤ C - B + B * 0.9.

[0012] In some embodiments of the present application:

[0013] Let the wall thickness of the terminal box be \(t\) mm, and the volume of the terminal box be \(V\) \(mm^3\). 3 , satisfying: \(t / V>2.11\times10^{-3}\). -5 .

[0014] In some embodiments of the present application, the compressor further includes:

[0015] An insulating inner bushing, which is arranged in the accommodating space, and the insulating inner bushing opens downward and opens toward the second through hole, and the insulating inner bushing is arranged on the inner wall of the terminal box.

[0016] In some embodiments of the present application:

[0017] Let the maximum width of the insulating inner bushing be \(E\) mm, the width of the accommodating space at the opening toward the end plate be \(F\) mm, and the included angle between the top wall and the side wall of the terminal box forming the accommodating space be \(D^{\circ}\), satisfying: \(E = F\), and \(90.2^{\circ}\leq D\leq95^{\circ}\).

[0018] In some embodiments of the present application:

[0019] Convex ribs are arranged on the outer side wall of the insulating inner bushing, the convex ribs extend up and down, and the convex ribs are located between the insulating inner bushing and the terminal box.

[0020] In some embodiments of the present application:

[0021] Let the distance that the convex rib protrudes from the outer side wall of the insulating inner bushing be \(G\) mm, satisfying: \(0.05\leq G\leq0.8\).

[0022] In some embodiments of the present application:

[0023] The bottom of the terminal box protrudes from the bottom of the insulating inner bushing;

[0024] The deformed part of the gasket is in contact with the bottom of the insulating inner bushing.

[0025] In some embodiments of the present application:

[0026] Let the distance that the bottom of the terminal box protrudes from the insulating inner bushing be \(L\) mm, satisfying: \(0.2\leq L\leq1\).

[0027] In some embodiments of the present application:

[0028] An avoidance notch is arranged on the gasket, and the avoidance notch is used to avoid the nut.

[0029] In some embodiments of the present application:

[0030] Let the thickness of the end plate be H mm, satisfying 0.5 ≤ H ≤ 5.

[0031] The present utility model provides a compressor. Compared with the prior art, its beneficial effects are as follows:

[0032] The compressor of the present utility model includes a housing, an end plate, a nut, a terminal box, a bolt, and a gasket. The end plate is welded to the housing, the terminal box is connected to the end plate through the cooperation of the bolt and the nut, and a gasket is provided between the terminal box and the end plate. The terminal box abuts against the gasket to force the gasket to deform, and the numerical relationship among the distance between the connecting part and the bottom of the terminal box, the thickness of the gasket, and the thickness of the nut is such that after the gland is inserted into the second through hole, the overall terminal box has good sealing performance, and the refrigerant will not enter the accommodation space, isolating the refrigerant gas leaked at the wiring terminal of the compressor from the outside of the terminal box, preventing the surrounding environment from catching fire and exploding due to refrigerant leakage, affecting the safety of the system. At the same time, it can also waterproof and dustproof the wiring terminal, and prevent the refrigerant leaked from the system outside the terminal box from entering the terminal box. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of a part of the housing and the terminal box of the compressor according to an embodiment of the present utility model.

[0034] Figure 2 is the base plate and the wiring terminal of the compressor according to an embodiment of the present utility model.

[0035] Figure 3 is a schematic structural diagram of the end plate, the gasket, etc. according to an embodiment of the present utility model.

[0036] Figure 4 is a schematic structural diagram of the terminal box according to an embodiment of the present utility model.

[0037] Figure 5 is a schematic structural diagram of the gasket according to an embodiment of the present utility model.

[0038] Figure 6 is a schematic structural diagram of the end plate according to an embodiment of the present utility model.

[0039] Figure 7 is a schematic structural diagram of the end plate and the nut according to an embodiment of the present utility model.

[0040] Figure 8 is a schematic structural diagram of the insulating inner bushing according to an embodiment of the present utility model.

[0041] Figure 9 is Figure 8 an enlarged schematic view of the X position in

[0042] Figure 10It is a cross-sectional view of the terminal box and the insulating inner bushing of the embodiment of the present utility model.

[0043] Figure 11 is Figure 10 an enlarged schematic view of the position Y in

[0044] In the figure, 1 is the outer shell; 2 is the end plate; 3 is the nut; 4 is the terminal box; 5 is the bolt; 6 is the gasket; 7 is the insulating inner bushing; 8 is the gland; 11 is the base plate; 12 is the terminal; 21 is the first through hole; 22 is the second connection hole; 41 is the accommodating space; 42 is the second through hole; 43 is the connecting portion; 44 is the first connection hole; 61 is the avoiding notch; 71 is the rib. Detailed implementation manners

[0045] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0046] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0048] In addition, in the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0049] For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0050] Please refer to Figures 1-3, A compressor according to a preferred embodiment of the present utility model includes: a housing 1, an end plate 2, a nut 3, a terminal box 4, a bolt 5, and a gasket 6.

[0051] Please refer to Figure 2 , A glass terminal is provided on the surface of the housing 2. The glass terminal includes a base plate 11 and a terminal 12. The base plate 11 is provided on the housing 2, and the base plate 11 extends the terminal 12 outward. In this embodiment, holes are provided on the surface of the housing 2, and at least a part of the glass terminal extends into the holes. The base plate 11 and the housing 2 are welded and fixed. The terminal 12 is located outside the housing 2. The base plate 11 and the terminal 12 are electrically connected to the power supply through a wire, and a gland 8 is sleeved outside the wire.

[0052] Please refer to Figure 3 and Figure 6 , The end plate 2 has a first through hole 21. The end plate 2 is sleeved outside the base plate 11 through the first through hole 21, and the end plate 2 is welded to the housing 1.

[0053] The welding of the end plate 2 and the housing 1 can be the welding of the wall surface of the hole wall of the first through hole 21 and the surface of the housing 1 to form a circumferential weld, or the end plate 2 around the first through hole 21 can be welded on the surface of the housing 1, and the weld bead surrounds the first through hole 21, also forming a circumferential weld.

[0054] Please refer to Figure 7 , The nut 3 is welded to the end plate 2. The nut 3 is also welded to the end plate 2 on the circumferential surface to form a circumferential weld, ensuring that the nut 3 is firmly connected to the end plate 2.

[0055] Please refer to Figure 4 , The terminal box 4 is a box body with an opening at the bottom. The terminal box 4 is provided on the end plate 2 and forms a receiving space 41 with the end plate 2. The terminal 12 is located in the receiving space 41. A second through hole 42 communicating with the receiving space 41 is provided on the outer wall of the terminal box 4. The second through hole 42 is used to connect the gland 8. A connecting portion 43 is also provided on the outer wall of the terminal box 4, and a first connecting hole 44 penetrating through the connecting portion 43 is provided on the connecting portion 43.

[0056] The terminal box 4 is equivalent to covering the outside of the terminal 12. The gland 8 passes through the second through hole 42. After the gland 8 is inserted into the second through hole 42, the second through hole 42 can also be sealed with the outer wall of the gland 8 to prevent the refrigerant from entering the receiving space 41 from the gap between the second through hole 42 and the gland 8.

[0057] The bolt 5 passes through the first connecting hole 44 and is connected to the nut 3. After the bolt 5 is connected to the nut 3, the terminal box 4 is fixed.

[0058] Please refer to Figure 5, a gasket 6 is arranged between the terminal box 4 and the end plate 2, and the terminal box 4 presses against the gasket 6 to force the gasket 6 to deform. Due to the acting force between the bolt 5 and the nut 3, the terminal box 4 will press against the gasket 6. The gasket 6 is made of a flexible material such as rubber. When the terminal box 4 presses against the gasket 6, the gasket 6 deforms, and the gap between the gasket 6 and the bottom of the terminal box 4 is sealed.

[0059] Wherein, the distance between the connecting portion 43 and the bottom of the terminal box 4 is denoted as A mm, the thickness of the gasket 6 is B mm, and the thickness of the nut 3 is C mm, satisfying: A > 0.2 and C - B + B * 0.1 ≤ A ≤ C - B + B * 0.9.

[0060] When this range is satisfied, the accommodation space 41 formed by the terminal box 4 can achieve the protection effect of IP (Ingress Protection, protection level) 67, which can not only waterproof and dustproof the wiring terminal 12, but also prevent the refrigerant leaked from the external system of the terminal box 4 from entering the terminal box 4.

[0061] This embodiment provides a compressor. After the gland 8 is inserted into the second through hole 42, the whole terminal box 4 has good sealing performance, and the refrigerant will not enter or exit between the accommodation space 41 and the terminal box 4, isolating the refrigerant gas leaked at the wiring terminal 12 of the compressor from the outside of the terminal box 4, preventing the surrounding environment from catching fire and exploding due to refrigerant leakage, affecting the safety of the system. At the same time, it can also waterproof and dustproof the wiring terminal 12, and prevent the refrigerant leaked from the external system of the terminal box 4 from entering the terminal box 4, preventing the risk of increasing fire and explosion. If a fire and explosion occur to the refrigerant in the terminal box 4, it will not affect the external environment.

[0062] When measuring A, measure the distance between the connecting portion 43 and the bottom of the terminal box 4 through a length measuring tool such as a ruler or a tape measure, and take the average value after measuring multiple times.

[0063] When measuring B, measure the distance between the upper surface and the lower surface of the gasket 6 through a length measuring tool such as a ruler or a tape measure, and take the average value after measuring multiple times.

[0064] When measuring C, measure the distance between the upper surface and the lower surface of the nut 3 through a length measuring tool such as a ruler or a tape measure, and take the average value after measuring multiple times.

[0065] In this embodiment, please refer to Figure 4 , the connecting portion 43 is arranged on two outer side walls of the terminal box 4 that are opposite to each other, and the connecting portion 43 is also arranged on both sides of the second through hole 42. Two first connection holes 44 are arranged on each connecting portion 43, and the first connection holes 44 correspond to the bolts 5 one by one.

[0066] Please refer to Figure 6, a second connection hole 22 is provided on the end plate 2. The second connection hole 22 corresponds to the nut 3. When the bolt 5 is connected to the nut 3, the bolt 5 can also extend into the second connection hole 22 and be connected to the second connection hole 22.

[0067] In some embodiments, the wall thickness of the terminal box 4 is denoted as t mm, and the volume of the terminal box 4 is V mm 3 , satisfying: t / V > 2.11*10 -5 .

[0068] When within this range, the terminal box 4 itself has a certain strength. Even if the refrigerant in the accommodation space 41 is detonated by the electric spark of the terminal 12, it can ensure an explosion inside the accommodation space 41, reduce the impact on the external environment, and play a certain explosion-proof role.

[0069] When measuring t, the terminal box 4 can be cut open, the cross-section of the terminal box 4 can be taken, and measured by length measuring tools such as a ruler or a tape measure. Take the average value after measuring multiple times.

[0070] In some embodiments, please refer to Figure 8 and Figure 9 , the compressor further includes an insulating inner sleeve 7. The insulating inner sleeve 7 is arranged in the accommodation space 41, and the insulating inner sleeve 7 opens downward and opens toward the second through hole 42. The insulating inner sleeve 7 is arranged on the inner wall of the terminal box 4.

[0071] The insulating inner sleeve 7 is made of a flexible material. The insulating inner sleeve 7 abuts against the inner wall of the terminal box 4, which can isolate the terminal 12 from the terminal box 4, insulate the space between the terminal 12 and the terminal box 4, and improve safety.

[0072] The downward opening of the insulating inner sleeve 7 can allow the insulating inner sleeve 7 to cover the outside of the terminal 12; the opening of the insulating inner sleeve 7 toward the second through hole 42 can avoid the gland 8.

[0073] Denote the maximum width of the insulating inner sleeve 7 as E mm, the width of the accommodation space 41 at the opening toward the end plate 2 as F mm, and the angle between the top wall and the side wall of the terminal box 4 forming the accommodation space 41 as D°. Satisfying: E = F, and 90.2° ≤ D ≤ 95°.

[0074] The interference fit between the insulating inner sleeve 7 and the terminal box 4 can fix the position of the insulating inner sleeve 7 relative to the terminal box 4 and prevent the insulating inner sleeve 7 from moving or falling off.

[0075] When measuring E, measure the distance between the two opposite outer side walls of the insulating inner sleeve 7 by length measuring tools such as a ruler or a tape measure, and these two outer side walls are respectively located on both sides of the opening toward the second through hole 42. Take the average value after measuring multiple times.

[0076] When measuring F, measure the distance between the two inner walls of the terminal box 4 at the opening towards the end plate 2 using a length measuring tool such as a ruler or a tape measure. These two inner walls are located on both sides of the second through hole 42, and take the average value after measuring multiple times.

[0077] When measuring D, the terminal box 4 can be dissected to take a cross-section of the terminal box 4, and measure the included angle between the inner wall and the top inner wall of the terminal box 4 using an angle measuring tool such as a protractor. These two outer walls are respectively located on both sides of the opening towards the second through hole 42, and take the average value after measuring multiple times.

[0078] Ribs 71 are provided on the outer wall of the insulating lining sleeve 7. The ribs 71 extend vertically and are located between the insulating lining sleeve 7 and the terminal box 4. The ribs 71 can be provided in multiple numbers, and the multiple ribs 71 are symmetrically arranged.

[0079] Denote the distance that the rib 71 protrudes from the outer wall of the insulating lining sleeve 7 as G mm, and it satisfies: 0.05 ≤ G ≤ 0.8.

[0080] The setting of the ribs 71 can reduce the contact area between the insulating lining sleeve 7 and the inner wall of the terminal box 4, reduce the resistance when the insulating lining sleeve 7 is inserted into the terminal box 4, improve the assembly efficiency between the terminal box 4 and the insulating lining sleeve 7, and improve the assembly workability.

[0081] When measuring G, measure the distance between the point on the rib 71 farthest from the insulating lining sleeve 7 and the outer wall of the insulating lining sleeve 7 using a length measuring tool such as a ruler or a tape measure, and take the average value after measuring multiple times.

[0082] It should be noted here that when setting the rib 71, the maximum width of the insulating lining sleeve 7 includes the size of the rib 71.

[0083] In some embodiments, please refer to Figure 10 and Figure 11 , the bottom of the terminal box 4 protrudes from the bottom of the insulating lining sleeve 7; the deformed part of the gasket 6 is in contact with the bottom of the insulating lining sleeve 7.

[0084] When the bolt 5 and the nut 3 are connected together, the terminal box 4 presses against the gasket 6. The position of the gasket 6 in the accommodation space 41 close to the inner wall of the terminal box 4 is warped upward and is in contact with the bottom of the insulating lining sleeve 7, thereby better improving the sealing performance and the effect of waterproofing and dustproofing.

[0085] Denote the distance that the bottom of the terminal box 4 protrudes from the insulating lining sleeve 7 as L mm, and it satisfies: 0.2 ≤ L ≤ 1.

[0086] When this range is satisfied, the gasket 6 can be brought into contact with the bottom of the insulating inner sleeve 7. If the value of L is too large, the upward warping amplitude of the gasket 6 is insufficient to contact the bottom of the insulating inner gasket 6. If the value of L is too small, the gasket 6 will force the bottom of the insulating inner sleeve 7 to deform.

[0087] When measuring L, the distance between the bottom of the terminal box 4 and the bottom of the insulating inner sleeve 7 is measured by length measuring tools such as a ruler or a tape measure, and the average value is taken after multiple measurements.

[0088] In some embodiments, an avoidance notch 61 is provided on the gasket 6, and the avoidance notch 61 is used to avoid the nut 3.

[0089] The nut 3 passes through the gasket 6 to prevent a force from being applied to the gasket 6.

[0090] Let the thickness of the end plate 2 be H mm, and it satisfies: 0.5 ≤ H ≤ 5.

[0091] When this range is satisfied, it can not only ensure that the end plate 2 has sufficient strength, but also prevent the end plate 2 from being too thick.

[0092] When measuring H, the distance between the upper surface and the lower surface of the end plate 2 is measured by length measuring tools such as a ruler or a tape measure, and the average value is taken after multiple measurements.

[0093] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A compressor, characterized in that, Comprising: A housing, on the surface of which there are glass terminals. The glass terminals include a base plate and a connection terminal. The base plate is provided on the housing, and the connection terminal extends outwards from the base plate. An end plate having a first through-hole. The end plate is sleeved outside the base plate through the first through-hole, and the end plate is welded to the housing. A nut welded to the end plate. A terminal box, which is a box body with an opening at the bottom. The terminal box is provided on the end plate and forms a receiving space with the end plate. The connection terminal is located in the receiving space. On the outer wall of the terminal box, there is a second through-hole communicating with the receiving space. The second through-hole is used to connect a gland. On the outer wall of the terminal box, there is also a connection part, and the connection part is also provided with a first connection hole penetrating through the connection part. A bolt passing through the first connection hole and connecting with the nut. A gasket provided between the terminal box and the end plate. The terminal box abuts against the gasket, forcing the gasket to deform. Wherein, the distance between the connection part and the bottom of the terminal box is denoted as A mm, the thickness of the gasket is B mm, and the thickness of the nut is C mm, satisfying: A > 0.2 and C - B + B * 0.1 ≤ A ≤ C - B + B * 0.

9.

2. The compressor according to claim 1, wherein: Let the wall thickness of the terminal box be \(t\) mm, and the volume of the terminal box be \(V\) \(mm^3\). 3 , satisfying: \(t / V>2.11\times10\) -5 .

3. The compressor according to claim 1, characterized in that, It further comprises: An insulating inner sleeve provided in the receiving space, and the insulating inner sleeve opens downward and towards the second through-hole. The insulating inner sleeve is provided on the inner wall of the terminal box.

4. The compressor according to claim 3, wherein: Denote the maximum width of the insulating inner sleeve as E mm, the width of the receiving space at the opening towards the end plate as F mm, and the included angle between the top wall and the side wall of the terminal box forming the receiving space as D°. Satisfying: E = F, and 90.2° ≤ D ≤ 95°.

5. The compressor according to claim 3, wherein: On the outer side wall of the insulating inner sleeve, there are protruding ribs extending vertically. The protruding ribs are located between the insulating inner sleeve and the terminal box.

6. The compressor according to claim 5, wherein: Denote the distance that the protruding rib protrudes from the outer side wall of the insulating inner sleeve as G mm, satisfying: 0.05 ≤ G ≤ 0.

8.

7. The compressor according to claim 3, wherein: The bottom of the terminal box protrudes from the bottom of the insulating inner sleeve; The deformed part of the gasket is in contact with the bottom of the insulating inner sleeve.

8. The compressor according to claim 7, wherein: Denote the distance that the bottom of the terminal box protrudes from the insulating inner sleeve as L mm, satisfying: 0.2 ≤ L ≤ 1.

9. The compressor according to claim 1, wherein: The gasket is provided with an avoidance notch for avoiding the nut.

10. The compressor according to claim 1, wherein: Denote the thickness of the end plate as H mm, satisfying: 0.5 ≤ H ≤ 5.

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