JP2006342672A - Compressor for refrigerant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of having the possibility of becoming unable to maintain the dustproof-waterproof function, due to having risk of separation of painting of a painting surface and damage of a gasket, since the painting surface softens and is fused on the gasket when the outside surface becomes the high temperature by operation of a compressor, though being formed as a structure for filling up clearance by sandwiching and compressing the gasket in a clearance part of a power source terminal box, in the compressor for painting the outside surface of the compressor for a refrigerant for preventing rust and forming the power source terminal box as a dustproof-waterproof structure. <P>SOLUTION: The gasket sandwiched in the clearance part of the power source terminal box, is superposed by two sheets, and is formed as a center hollowed-out structure of hollowing out the central side except for a part contacting with a sheet surface of a terminal box body of a gasket plane, and thereby, even when the painting surface is fused on the gasket when the painting surface softens, the inside of the power source terminal box can be inspected, and separation of the painting of the painting surface and damage of the gasket can also be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a refrigerant compressor having a power terminal box having a dustproof and waterproof structure, which prevents damage to a sandwiched gasket when the lid of the power terminal box is opened and closed, and maintains a dustproof and waterproof function.

  FIG. 1 shows a structural diagram of a conventional general refrigerant compressor. The compressor includes a chamber 1, a mechanical component 2, and a motor 3. On the outer surface. The power terminal box 4 includes a terminal box main body 5 using a steel plate and a lid 6, and the terminal box main body 5 is coated for rust prevention including the surface of the chamber 1. During operation of the compressor, the pressure in the suction pipe 7 of the compressor is low and low, and the pressure in the discharge pipe 8 is high and high. In the present compressor, the chamber inner space 9 has a structure corresponding to the pressure and temperature in the discharge pipe 8, so that the outer surface of the chamber 1 also rises to a temperature corresponding to the discharge pipe 8, In some cases, the power supply terminal box 4 attached to the temperature of the power supply terminal box 4 also has a temperature corresponding to the outer surface of the chamber 1. In contrast, FIGS. 2 and 3 show examples in which the power terminal box has a dustproof and waterproof structure. FIG. 2 is a structural diagram of the compressor, and has the same structure as the compressor shown in FIG. 1 except for the power terminal box 104. FIG. 3 is a structural diagram of the power supply terminal box 104 of the compressor shown in FIG. 3 includes a terminal box body 105, a lid 106, a gasket 110, and a lid mounting screw 111. The gasket 110 is sandwiched between flat surfaces between the terminal box body 105 and the lid 106 and is used for lid mounting. Fastened with screws 111 and fixed. The terminal box body 105 and the lid 106 are coated steel plates, but the painted surfaces may soften at high temperatures. Since the contact surface between the terminal box body 105 and the gasket 110 and the contact surface between the lid 106 and the gasket 110 are compressed by fastening, the coating softened at each contact surface is fused with the gasket 110 and the lid 106 cannot be removed. The gasket 110 may peel off or the gasket 110 may be damaged.

JP 2003-184775 A

  In the compressor for refrigerant, when the power terminal box is made dustproof and waterproof, it is necessary to sandwich the gasket in the part that needs to be sealed, and to fill the gap. In such a case, the coating may soften and the gasket and the painted surface may be fused. At that time, when the gasket surface is opened to remove the lid for inspection, etc., the paint surface is peeled off, the gasket is damaged at the fused part, and dust is required when the lid is reinstalled. In some cases, the waterproof function could not be performed.

  If the gasket used for the dustproof and waterproof structure of the power terminal box is doubled and the cover is removed, the paint surface is opened by opening between the two gaskets even if the paint surface and the gasket are fused. It is possible to remove the lid without causing paint peeling or gasket damage. In addition, the gasket has a hollow structure in which the center side excluding the part that contacts the sheet surface of the terminal box body on the gasket plane is pulled out, so that the terminal connection part can be Inspection is possible. Particularly when used at a high temperature, the gasket material is made of silicon or fluororubber.

  The power terminal box has a dust-proof and waterproof structure, and in a compressor for refrigerant where the surface of the power terminal box becomes hot during operation, the power terminal box must be installed to check the connection status of the power cable in the power terminal box during inspection. When the lid is opened, it is possible to prevent the paint surface from being peeled off or damage the sandwiched gasket, and to reliably maintain the dustproof and waterproof function.

  Examples of the present invention will be described below.

  Example 1 is an example in which the power terminal box is composed of a terminal box body, two gaskets, a lid and a lid mounting screw. Example 2 is a power terminal box for mounting the terminal box body, gasket and terminal box body. An example composed of screws is shown.

  FIG. 4 is a structural diagram of the compressor according to the first embodiment. A structural diagram of the power terminal box 204 of the compressor of FIG. 4 is shown in FIG. The power terminal box is composed of a terminal box body 205 made of a steel plate and a lid 206, two gaskets 210 and a lid mounting screw 211. The two gaskets 210 are sandwiched between the terminal box body 205 and the lid 206 and are compressed by tightening the lid mounting screw 211 to fill the gap between the terminal box body 205 and the lid 206, thereby providing a dustproof and waterproof structure. Since the gasket 210 is a heat-resistant silicone sponge and has a hollow structure in which the center side is removed except for the portion that contacts the sheet surface of the terminal box body 205 on the flat surface of the gasket 210, the power terminal box 204 becomes hot. Even when the painted surfaces of the terminal box body 205 and the lid 206 are softened and fused to the two gaskets 210, the two gaskets 210 having high heat resistance are not fused. Further, since the gasket 210 has the above-described hollow structure, even if the gasket 210 and the painted surface of the terminal box are fused, the terminal connection portion 212 can be inspected. Therefore, when removing the lid 206 at the time of inspection or the like, the gap between the two gaskets 210 can be opened, and since the gasket 210 has the hollow structure, the terminal connection portion 212 can be inspected. It is possible to prevent the paint surface from being peeled off and the gasket 210 from being damaged.

  FIG. 6 is a structural diagram of a compressor according to the second embodiment. In the second embodiment, two gaskets 310 having the same hollow structure as the gasket 210 described in the first embodiment are sandwiched between the terminal box body 305 and the chamber 301, and the terminal box body mounting screws 311 are used to The box body 305 is attached to the chamber 301. When the terminal box body 305 is removed by inspection or the like, the gap between the two gaskets 310 can be opened, and the paint surface is not peeled off and the gasket 310 is not damaged.

  In Example 3, compared with Example 1, two gaskets are made of a fluororubber sponge (not shown).

  In the fourth embodiment, the two gaskets are made of a fluororubber sponge (not shown) as compared to the second embodiment.

The structural diagram of a general refrigerant compressor is shown. The conventional compressor structure figure which made the power terminal box the dustproof waterproof structure is shown. The power terminal box structure figure of the compressor of FIG. 2 is shown. The compressor structure figure of Example 1 of this invention is shown. The power terminal box structural drawing of the compressor of Example 1 of this invention is shown. The compressor structure figure of Example 2 of this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chamber, 2 ... Mechanical component, 3 ... Motor, 4 ... Power supply terminal box, 5 ... Terminal box main body, 6 ... Cover, 7 ... Intake piping, 8 ... Discharge piping, 9 ... Space in compressor chamber, 12 ... Terminal Connection part 104 ... Power supply terminal box 105 ... Terminal box body 106 ... Lid 110 ... Gasket 111 ... Screw for attaching the lid 204 ... Power supply terminal box 205 ... Terminal box body 206 ... Lid 210 ... Gasket 211 ... Screws for attaching the lid, 212 ... Terminal connection portion, 301 ... Compressor chamber, 305 ... Terminal box body, 310 ... Gasket, 311 ... Screws for attaching the terminal box body.

Claims (5)

  The power supply terminal box has a structure in which a gasket is sandwiched between the terminal box main body and the lid. The terminal box main body and the lid are made of a coated steel plate, and a refrigerant compressor in which the chamber has a pressure corresponding to the discharge pressure during operation. The refrigerant compressor is characterized in that two gaskets are sandwiched between the terminal box body and the lid.   The power supply terminal box has a structure in which a gasket is sandwiched between the compressor chamber and the terminal box body. The chamber and the terminal box body are made of a coated steel plate, and the pressure in the chamber corresponds to the discharge pressure during operation. A refrigerant compressor, wherein two gaskets sandwiched between a chamber and a terminal box body are stacked.   3. The refrigerant compressor according to claim 1 or 2, wherein the gasket attached to the power terminal box has a hollow structure in which a central side excluding a portion in contact with the sheet surface of the terminal plane body of the gasket plane is pulled out. Compressor for refrigerant.   4. The refrigerant compressor according to claim 3, wherein the gasket is made of silicon. 4. The refrigerant compressor according to claim 3, wherein a material of the gasket is fluororubber.

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