COMPRESSOR TERMINAL COVER STRUCTURE, COMPRESSOR, AND METHOD FOR MANUFACTURING COMPRESSOR

Abstract

The present invention discloses a terminal cover structure 10 for a compressor 1, which includes a terminal cover 20 having a terminal cover opening 24, a seal assembly 40 provided below the terminal cover 20 and having a base plate 42 and a seal member 50, the seal assembly 40 covering the entire peripheral portion of the terminal cover opening 24, and a terminal plate 60 provided below the seal assembly 40 and welded onto the upper cover 3 of the compressor 1. The seal member 50 has a first seal 52 that seals between the terminal cover 20 and the base plate 42, and a second seal 54 that seals between the base plate 42 and the terminal plate 60.

Description

[Technical field]

[0001] The present invention relates to a terminal cover structure for a compressor, a compressor, and a method for manufacturing a compressor. [Background technology]

[0002] It is known that a large terminal cover for connecting a power cable to a compressor is provided on the top lid of the compressor, as disclosed in Patent Document 1. This Patent Document 1 will be hereinafter referred to as PTL1.

[0003] In recent years, there has been a demand for improved waterproof and dustproof performance between the terminal cover and the compressor.

[0004] In the PTL1, a large fixing plate may be required to fix the terminal cover that houses the power cable on the top cover of the compressor, because a large fixing plate is required to support the large terminal cover with appropriate dimensions.

[0005] Furthermore, the compressor top cover is fixed to the compressor shell by welding, forming an annular weld, and therefore the welding is hindered by the large fixing plate.

[0006] Particularly in the case of small compressors, the large fixing plate interferes with welding the top cover to the outer shell of the compressor, which complicates the welding process.

[0007] Therefore, there is a need for a terminal cover structure for a compressor that can ensure waterproof and dustproof performance between the terminal cover and the top lid of the compressor, and also facilitate welding operations between the outer shell and the top lid of the compressor.

[0008] An object of the present invention is to provide a terminal cover structure for a compressor that can ensure waterproof and dustproof performance between the terminal cover and the top cover of the compressor, and can facilitate welding work between the outer shell and the top cover of the compressor. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2005-327557 A Summary of the Invention [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, a first embodiment of the present invention provides a terminal cover structure for a compressor, comprising: a terminal cover having a terminal cover opening at its bottom; a seal assembly provided below the terminal cover and having a base plate and a seal member, the seal assembly covering the entire peripheral portion of the terminal cover opening of the terminal cover; and a terminal plate provided below the seal assembly and welded onto the top cover of the compressor so that the seal assembly and terminal cover can be removably attached, the seal member having a first seal covering one side of the base plate to seal between the terminal cover and the base plate, and a second seal covering the other side of the base plate to seal between the base plate and the terminal plate.

[0011] First, according to an embodiment of the present invention, the seal assembly is provided between the terminal board and the terminal cover and includes a base plate and a seal member. The seal member further includes a first seal covering one side of the base plate to seal between the terminal cover and the base plate and a second seal covering the other side of the base plate to seal between the base plate and the terminal board, and the seal assembly covers the entire periphery of the terminal cover opening of the terminal cover.

[0012] Therefore, since the terminal cover opening of the terminal cover is sealed by the first seal on the base of the seal assembly, it is possible to improve the airtightness of the terminal cover and thereby reduce the size of the base of the seal assembly, insofar as the seal assembly covers the entire periphery of the terminal cover opening.

[0013] Second, because the terminal plate is welded to the top lid of the compressor to support the terminal cover and seal assembly, and similarly maintains the airtightness of the terminal cover, the terminal plate does not need to be as large as the base plate of the seal assembly.

[0014] Therefore, it is possible to make the terminal plate supporting the terminal cover as small as possible. As a result, it is possible to suppress interference between the terminal plate and the welding torch during welding to form the annular welded portion between the upper cover and the outer shell of the compressor. Therefore, the welding operation can be facilitated. Furthermore, even in the case of a small compressor, interference between the terminal plate and the welding torch during welding can be suppressed, thereby facilitating the welding operation.

[0015] Third, since the seal member has the first seal and the second seal, it is possible to improve the waterproof and dustproof performance between the terminal cover and the seal assembly, and between the seal assembly and the terminal board.

[0016] Therefore, according to the first embodiment of the terminal cover structure of the present invention, it is possible to ensure waterproof and dustproof performance between the terminal cover and the top lid of the compressor's sealed container, and similarly, to facilitate welding work between the outer shell and the top lid of the compressor's sealed container.

[0017] A second embodiment of the present invention provides a compressor including a terminal cover structure, a top lid and an outer shell, the outer shell further having an annular shell weld portion securing the lid and the outer shell together.

[0018] According to the second embodiment of the present invention, it is possible to ensure the waterproof and dustproof performance between the terminal cover and the top cover of the compressor, and also to facilitate the welding operation between the outer shell of the compressor and the top cover.

[0019] A third embodiment of the present invention provides a method for manufacturing a compressor in which a terminal cover structure is installed on a top lid of the compressor, the method including the steps of forming a seal assembly in which a base plate and a seal member are integrated, welding a terminal plate onto the top lid so that an annular terminal plate weld portion is formed as the area where the terminal plate and the top lid are welded together, welding the top lid to an outer shell of the compressor so that an annular outer shell weld portion is formed as the area where the top lid and the outer shell are welded together, mounting the terminal cover onto the seal assembly, and mounting the terminal cover and the seal assembly onto the terminal plate.

[0020] According to the third embodiment of the present invention, it is possible to manufacture a compressor that ensures waterproof and dustproof performance between the terminal cover and the top lid of the compressor, and similarly, can facilitate welding operations between the outer shell of the compressor and the top lid.

[0021] The principles of the invention and its advantages will become apparent in the following description, when considered in conjunction with the accompanying drawings. [Brief description of the drawings]

[0022] [Figure 1] 1 is a perspective view of a terminal cover structure 10 according to an embodiment of the present invention, which is installed on an upper cover 3 of an enclosed container 2 of a compressor 1. FIG. [Diagram 2] 2 is a perspective view of the terminal cover structure 10 of FIG. 1 excluding the terminal cover 20 and the seal assembly 40. FIG. [Figure 3A] 2 is a top view of the terminal cover structure 10 of FIG. 1 which is installed on the upper lid 3 of the sealed container 2 of the compressor 1. FIG. [Figure 3B] 2 is a top view of the terminal cover structure 10 of FIG. 1 excluding the terminal cover 20 and the seal assembly 40. FIG. [Figure 4A] FIG. [Figure 4B] FIG. [Figure 4C] FIG. 4C is a cross-sectional view taken along line IVC-IVC in FIG. 4B. [Figure 5A]2 is a perspective view of the seal assembly 40 as viewed obliquely from above. FIG. [Figure 5B] 2 is a perspective view of the seal assembly 40 as viewed obliquely from below. FIG. [Figure 5C] FIG. 2 is a top view of the seal assembly 40. [Figure 5D] 5D is a cross-sectional view of the seal assembly 40 taken along line VD-VD of FIG. 5C. [Figure 6A] 2 is a perspective view of the base plate 42 of the seal assembly 40 as viewed obliquely from above. [Figure 6B] 6B is a top view of the substrate 42 of FIG. 6A. [Figure 6C] 6C is a cross-sectional view of the substrate 42 taken along the line VIC-VIC of FIG. 6B. [Figure 7A] 2 is a perspective view of a seal member 50 of the seal assembly 40 as viewed obliquely from above. FIG. [Figure 7B] FIG. 7B is a top view of the seal member 50 of FIG. 7A. [Figure 7C] 6 is a cross-sectional view of the seal member 50 taken along line VIIC-VIIC of FIG. 7B. [Figure 8] 8 is a schematic cross-sectional view of the terminal cover structure 10 taken along line VIII-VIII in FIG. 1. [Figure 9] FIG. 2 is an exploded view of the terminal cover structure 10. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Certain embodiments of the present invention will be described in detail below with reference to the drawings.

[0024] 1 is a perspective view of a terminal cover structure 10 according to an embodiment to be installed on a top cover 3 of a sealed container 2 of a compressor 1. The sealed container 2 has a cylindrical outer shell 4 and a top cover 3 that is attached by welding to the outer shell 4. A light gray annular shell weld portion "A" is formed as the area where the top cover 3 and the outer shell 4 are welded together.

[0025] As shown in Figures 1 to 3B and 8, the terminal cover structure 10 includes a terminal plate 60 welded onto the upper lid 3 of the sealed container 2, a terminal cover 20 provided above the terminal plate 60 and accommodating a power cable 5 and a signal line 6 therein, and a seal assembly 40 provided between the terminal plate 60 and the terminal cover 20.

[0026] As shown in Figures 1, 3A, 4A to 4C, and 8, the terminal cover 20 is a box-shaped member with a chamber inside. The terminal cover 20 is made of aluminum, but is not limited to this. A circular terminal cover hole 22 for fixing the power cable 5 and installing the cable gland 9 is formed inside the terminal cover 20, ensuring waterproof and dustproof performance between the power cable 5 and the terminal cover 20. Furthermore, a rectangular terminal cover opening 24 is formed at the bottom inside the terminal cover 20.

[0027] The power cable 5 has signal wires 6 therein, each of which is covered with an insulating coating layer. The signal wires 6 are connected to a connection terminal 7 provided on a sealed terminal 8 fixed on the top cover 3 of the sealed container 2 through a terminal cover opening 24 by fastening or welding.

[0028] The terminal cover 20 has a pair of jaw members 26 that extend outwardly from the bottom side and in the longitudinal direction of the terminal cover 20. Three through holes 28 are formed within each jaw member 26 for securing the terminal cover 20 to the seal assembly 40 and the terminal board 60.

[0029] As shown in Figures 5A to 5D, the seal assembly 40 is made up of a base plate 42 and a seal member 50 covering both sides of the base plate 42. The base plate 42 has a circular first hole 43 formed so that the power cable 5 can be inserted (see Figures 6A to 6C). The seal assembly 40 is provided between the terminal board 60 and the terminal cover 20. A detailed description of the seal assembly 40 will be given later.

[0030] 2, 3B and 8, terminal plate 60 is a flat plate member having a substantially elliptical shape when viewed from above, and has a circular second hole 62 formed substantially at the center of terminal plate 60 so that power cable 5 can be inserted therein. Terminal plate 60 is made of (but is not limited to) low carbon steel or carbon steel.

[0031] The terminal board 60 is formed so as to be smaller than the substrate 42 when viewed from above. Therefore, it is possible to make the terminal board 60 that supports the terminal cover 20 as small as possible.

[0032] As will be described later, when the top cover 3 to which the terminal plate 60 is welded and fixed is welded to the outer shell 4, the top cover 3 is welded in a ring shape to the outer shell 4. Therefore, since the terminal plate 60 supporting the terminal cover 20 is formed as small as possible, interference between the terminal plate 60 and a welding torch (not shown) during welding can be suppressed, and the welding operation can be facilitated.

[0033] Even when the terminal cover structure 10 is installed in a small compressor, interference between the terminal plate 60 and the welding torch during welding can be suppressed, thereby facilitating the welding operation.

[0034] The terminal plate 60 is a member that supports from below the terminal cover 20 and the seal assembly 40 of the terminal cover structure 10. Furthermore, the terminal plate 60 is welded onto the upper lid 3 of the sealed container 2.

[0035] 3B by the annular terminal plate welding portion A highlighted in dark gray, the entire periphery of the edge of the terminal plate 60 facing the second hole 62 is welded to the top lid 3 of the sealed container 2 and fixed to the top lid 3 of the sealed container 2. Therefore, it is possible to ensure the waterproof and dustproof performance between the terminal plate 60 and the top lid 3 of the sealed container 2.

[0036] 2 and 3B, when the terminal cover structure 10 is attached to the upper lid 3 of the sealed container 2, four cylindrical terminal board nut members 64 are formed on the terminal board 60 at positions corresponding to the positions of the four through holes of the terminal cover 20. An internal thread is formed on the inner peripheral wall of each of the terminal board nut members 64.

[0037] As for the seal assembly 40, as shown in FIGS. 5A to 5D, the seal assembly 40 is made up of a base plate 42 having a circular first hole 43, and a seal member 50 covering both sides of the base plate 42.

[0038] 6A to 6C, the substrate 42 is a flat member made of low carbon steel or carbon steel (but is not limited to these). Four cylindrical first nut members 44 and two cylindrical second nut members 46 are formed in the substrate 42 at positions corresponding to the positions of the six through holes of the terminal cover 20 when the terminal cover structure 10 is attached to the upper lid 3 of the sealed container 2. A female thread is formed on the inner peripheral wall of each of the first nut member 44 and the second nut member 46.

[0039] A first bolt 12 having male threads that can be screwed into the female threads of the first nut member 44 of the base plate 42 of the seal assembly 40 and the terminal plate nut member 64 of the terminal plate 60 is inserted into the through hole 28, into the first nut member 44 of the base plate 42 of the seal assembly 40, and into the terminal plate nut member 64.

[0040] Therefore, since the terminal board 60, the terminal cover 20 and the seal assembly 40 are fixed by four-point fastening, the terminal cover 20 can be fixed to the terminal board 60.

[0041] A second bolt 14 having male threads that can be threadedly engaged with the female threads of the second nut member 46 of the base plate 42 of the seal assembly 40 and the female threads of the terminal plate nut member 64 of the terminal plate 60 is inserted into the through hole 28 and into the first nut member 44 of the base plate 42 of the seal assembly 40.

[0042] Therefore, since the terminal board 60 and the seal assembly 40 are fixed by two-point fastening, the terminal cover 20 can be easily attached to the seal assembly 40.

[0043] 7A to 7C, the seal member 50 has a first seal 52 that covers one side of the substrate 42, a second seal 54 that covers the other side of the substrate 42, and a connection portion 58 that connects the first seal 52 and the second seal 54 and is inserted and installed in the first hole 43. The seal member 50 has a seal member hole 56 that is formed to pass through the first seal 52, the second seal 54, and the connection portion 58.

[0044] The first seal 52 is formed in the shape of a thin flat plate so as to be easily deformed. The second seal 54 is formed to surround the seal member hole 56 on the opposite side of the connection portion 58 from the first seal 52.

[0045] The connecting portion 58 is formed to surround the seal member hole 56 and seal by contacting the entire inner circumferential surface of the first hole 43. As shown in Fig. 7C, the outer circumferential portion of the connecting portion 58 is formed to be recessed toward the seal member hole 56 relative to the outer circumferential portion of the second seal 54 so as to make it easier for the outer circumferential portion of the connecting portion 58 to engage with the first hole 43 of the substrate 42.

[0046] The seal member 50 is made of rubber, but is not limited to this, and is required to be a member that can be deformed when the terminal cover structure 10 is formed.

[0047] Since the first seal 52 is an easily deformable member, after the first seal 52 is deformed, a part of the first seal 52 can be inserted into the first hole 43 of the substrate 42, and then the thin, flat first seal 52 can be placed on the substrate 42 and brought into close contact with the substrate 42. Therefore, it is possible to form a seal assembly 40 in which the substrate 42 and the seal member 50 are integrated.

[0048] The first seal 52 has a pair of curved portions 52a formed to be recessed inwardly from the outer edge portion of the first seal 52. The second seal 54 has four notches 54a formed to be recessed inwardly from the outer edge portion of the second seal 54.

[0049] When the terminal cover structure 10 attached to the top lid 3 of the sealed container 2 is viewed from above, the curved portion 52a of the first seal 52 and the notch 54a of the second seal 54 are formed so as to be located at the position where the through hole of the terminal cover 20 is located.

[0050] Therefore, because the curved portion 52a and the notch 54a are formed in the seal member 50, the two second bolts 14 can be easily screwed into the terminal board nut member 64 of the terminal board 60 and into the second nut member 46 of the base plate 42 of the seal assembly 40, in that order. As a result, the terminal board 60 and the seal assembly 40 are fixed by two-point fastening, and similarly, the terminal cover 20 can be easily attached to the seal assembly 40. Furthermore, the terminal board 60, the terminal cover 20 and the seal assembly 40 are fixed by four-point fastening, and similarly, the terminal cover 20 can be fixed to the terminal board 60 so as not to move.

[0051] Next, a method for mounting the terminal cover structure 10 on the upper lid 3 of the sealed container 2 will be described in detail with reference to FIGS.

[0052] First, a seal assembly 40 is formed in which a substrate 42 and a seal member 50 are integrated. Since the first seal 52 of the seal member 50 is an easily deformable member, after the first seal 52 is deformed, a portion of the first seal 52 can be inserted into the first hole 43 (see FIGS. 6A to 6C) of the substrate 42, and then the thin, flat first seal 52 can be placed on the substrate 42, thereby forming the integrated seal assembly 40.

[0053] Secondly, a sealed terminal 8 having a connection terminal 7 is installed on the upper cover 3. In Fig. 9, the signal line 6 connected to the connection terminal 7 is omitted.

[0054] Thirdly, the terminal plate 60 is welded onto the top cover 3. As shown in Fig. 3B, the entire periphery of the edge of the terminal plate 60 facing the second hole 62 is welded to the top cover 3 and fixed thereto. A dark gray annular terminal plate welded portion "B" is formed as the area where the terminal plate 60 and the top cover 3 are welded together. Therefore, it is possible to ensure the waterproof and dustproof performance between the terminal plate 60 and the top cover 3 of the sealed container 2.

[0055] Fourth, the top cover 3 is welded to the shell 4 to form an annular shell weld area "A" that is light grey in color as the area where the top cover 3 and shell 4 are welded together.

[0056] Since the terminal plate 60 is formed to be smaller than the base plate 42 when viewed from above, it is possible to make the terminal plate 60 supporting the terminal cover 20 as small as possible. Therefore, interference between the terminal plate 60 and the welding torch during welding can be suppressed, which facilitates the welding operation. Furthermore, even in the case of a small compressor, interference between the terminal plate 60 and the welding torch during welding can be suppressed, which facilitates the welding operation.

[0057] Fifth, the terminal cover 20 is attached onto the seal assembly 40. Since the curved portion 52a and the notch 54a (see FIGS. 7A and 7B) are formed in the seal member 50 of the seal assembly 40, each of the two second bolts 14 can be easily screwed into the terminal board nut member 64 of the terminal board 60 and into the second nut member 46 of the base plate 42 of the seal assembly 40, in that order.

[0058] Therefore, since the terminal board 60 and the seal assembly 40 are fixed by two-point fastening, the terminal cover 20 can be easily temporarily fixed to the seal assembly 40.

[0059] Sixth, the terminal cover 20 and the seal assembly 40 are attached onto the terminal board 60. Since the curved portion 52a and the notch 54a are formed in the seal member 50 of the seal assembly 40, each of the four first bolts 12 can be easily screwed into the through hole 28 of the terminal cover 20, into the first nut member 44 of the base plate 42 of the seal assembly 40, and into the terminal board nut member 64.

[0060] Therefore, since the terminal board 60, the terminal cover 20 and the seal assembly 40 are fixed by four-point fastening, the terminal cover 20 can be fixed to the terminal board 60 so as not to move.

[0061] Finally, a cable gland 9 is installed on the terminal cover 20 to ensure waterproof and dustproof performance between the power cable 5 and the terminal cover 20 (see FIG. 8).

[0062] As described above, by ensuring the waterproof and dustproof performance of the terminal cover structure 10, as well as the waterproof and dustproof performance between the terminal cover 20 and the top lid 3 of the sealed container 2, there is no need to provide a large terminal board 60 to support the terminal cover 20.

[0063] Therefore, since a large fixing plate is not required to fix the terminal cover 20 onto the top lid 3 of the sealed container 2 of the compressor 1, it is possible to facilitate the welding work between the outer shell 4 of the sealed container 2 and the top lid 3.

[0064] According to this embodiment, the seal assembly 40 is provided between the terminal board 60 and the terminal cover 20 and has the base plate 42 and the seal member 50 covering both sides of the base plate 42, so that it is possible to improve the waterproof and dustproof performance between the terminal cover 20 and the seal assembly 40 and between the seal assembly 40 and the terminal board 60. Furthermore, since the terminal board 60 is welded onto the upper lid 3 of the sealed container 2, it is possible to ensure the waterproof and dustproof performance between the terminal cover 20 and the upper lid 3 of the sealed container 2 of the compressor 1.

[0065] Therefore, according to this embodiment, waterproof and dustproof performance between the terminal cover 20 and the top lid 3 of the sealed container 2 of the compressor 1 is ensured, and similarly, even in the case of a small compressor, it is possible to facilitate welding work between the outer shell 4 and the top lid 3 of the sealed container 2 of the compressor 1.

[0066] Although specific embodiments of the present invention have been disclosed and described, as well as illustrated in the accompanying drawings, this is merely for the purpose of providing a better understanding of the principles of the present invention, and is not intended as a limitation on the scope and spirit of the teachings of the present invention. Various structural adaptations and modifications, such as the design or materials of the present invention, mounting mechanisms or embodiments of the various parts and elements will be possible and apparent to those skilled in the art without departing from the scope of the present invention, which should be determined by the claims. [Explanation of symbols]

[0067] 1 Compressor 2. Airtight containers 3 Top lid 4. Outer shell 5 Power Cable 6 Signal Line 7 Connection terminal 8 Sealed terminal 9 Cable Gland 10 Terminal cover structure 12 First Bolt 14 Second Bolt 20 Terminal cover 22 Terminal cover hole 24 Terminal cover opening 26 Jaw member 28 Through Hole 40 Seal assembly 42 Substrate 43 First Hole 44 First nut member 46 Second nut member 50 Sealing material 52 First Seal 52a Curved part 54 Second Seal 54a Notch 56 Sealing material hole 58 Connection 60 Terminal board 62 2nd hole 64 Terminal plate nut member A Outer shell welded part B Terminal plate welded part

Claims

1. A terminal cover structure (10) for a compressor (1), comprising: A terminal cover (20) having a terminal cover opening (24) at the bottom; a seal assembly (40) provided below the terminal cover (20) and having a base plate (42) and a seal member (50), the seal assembly (40) covering an entire peripheral portion of the terminal cover opening (24) of the terminal cover (20); a terminal plate (60) provided below the seal assembly (40) and welded onto the upper cover (3) of the compressor (1), to which the seal assembly (40) and the terminal cover (50) are detachably attached; Including, The terminal cover structure (10) has a first seal (52) that covers one side of the substrate (42) to form a seal between the terminal cover (20) and the substrate (42), and a second seal (54) that covers the other side of the substrate (42) to form a seal between the substrate (42) and the terminal board (60).

2. 2. The terminal cover structure (10) of claim 1, wherein the seal member (50) has the first seal (52), the second seal (54), and a connection portion (58) that connects the first seal (52) and the second seal (54) and penetrates the first seal (52) and the second seal (54).

3. 2. The terminal cover structure (10) according to claim 1, wherein the terminal board (60), the terminal cover (20) and the seal assembly (40) are fixed by four-point fastening.

4. The terminal cover structure (10) according to claim 1, characterized in that the terminal cover (20) and the seal assembly (40) are fixed by two-point fastening.

5. The terminal cover structure (10) of claim 1, characterized in that the terminal plate (60) has a second hole (62) formed to be positioned below the terminal cover opening (24), and the entire circumferential portion of the edge of the terminal plate (60) facing the second hole (62) is welded to the top cover (3) of the compressor (1) and fixed to the top cover (3).

6. 2. The terminal cover structure (10) according to claim 1, wherein the terminal board (60) is smaller than the base plate (42) when viewed from above.

7. 2. A compressor (1) including the terminal cover structure (10) of claim 1, the compressor (1) having the top cover (3) and an outer shell (4), the outer shell (4) further having an annular shell weld portion (A) that secures the top cover (3) and the outer shell (4) together.

8. A method for manufacturing a compressor (1) in which the terminal cover structure (10) according to claim 1 is installed on the top cover (3) of the compressor (1), comprising the steps of: forming the seal assembly (40) in which the substrate (42) and the seal member (50) are integrated; a step of welding the terminal plate (60) onto the top cover (3) so that an annular terminal plate welding portion (B) is formed as a region where the terminal plate (60) and the top cover (3) are welded together; welding the top cover (3) to the compressor shell (4) such that an annular shell weld (A) is formed as the area where the top cover (3) and the shell (4) are welded together; installing the terminal cover (20) over the seal assembly (40); mounting the terminal cover (20) and the seal assembly (40) on the terminal board (60); The method includes:

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