JP2010024940A - Electrical apparatus cover - Google Patents

Abstract

The present invention provides an electrical component cover that can satisfactorily achieve both electric shock prevention and fire spread prevention.
In an electrical component cover 104 for covering electrical components, members constituting the electrical component cover 104 are formed of an aluminum alloy, and an anodized film 106 is formed on the surface of the electrical component cover 104. Since the anodic oxide film 106 has an insulating property and the electrical component cover 104 is formed of an aluminum alloy, it is possible to prevent the spread of fire. Therefore, both the prevention of electric shock and the prevention of the spread of fire can be satisfactorily achieved. .
[Selection] Figure 1

Description

  The present invention relates to a cover suitable for electrical components such as a control board for a refrigeration cycle compressor and / or a control board for a refrigeration apparatus using the refrigeration cycle compressor.

  Conventionally, if the control board of the compressor for a refrigeration cycle and / or the control board of a refrigeration apparatus using the compressor for a refrigeration cycle are exposed as they are, an electric shock or ignition occurs due to adhesion of dust. So it is covered with a cover.

  In the compressor for the refrigeration cycle, electrical components such as a PTC (starting relay) for starting the electric elements of the compressor and a protector that cuts off the current when heated to a predetermined temperature are provided, and these electrical components are Conventionally, it has been covered with a cover for the purpose of preventing dust or fire, or preventing electric shock (see, for example, Patent Document 1).

  In addition, in patent document 1, although the material of the cover of an electrical component is not shown actively, this conventional cover is generally comprised with the synthetic resin or the metal. As an example, there is one using a phenolic resin material as a material of a terminal cover of a compressor (see, for example, Patent Document 2).

In addition, as a refrigerant | coolant used by a refrigerating cycle, although there exists a nonflammable thing and a flammable thing, the latter tends to be used frequently recently. Therefore, fire prevention measures are important in the cover of electrical components for the refrigeration cycle.
JP-A-10-47250 Japanese Utility Model Publication No.59-63663

  However, the above-mentioned conventional electrical component cover made of metal does not burn itself, so if an electrical component becomes hot or a flame occurs, it will burn due to its own combustion. The situation of spreading to the surroundings can be prevented. Further, the metal cover can effectively prevent the external flame from reaching the internal electrical components.

  However, since the metal cover is conductive, in order to prevent an electric shock, which is the original purpose of the cover, an electric shock preventing means such as an insulating member is required. On the other hand, the above-described conventional electrical component cover made of synthetic resin is good for preventing electric shock, but is not as effective in preventing fire spread as it is made of metal.

  That is, even if a cover is made using a flame-retardant synthetic resin, there is a problem that a flame is emitted for at least a short time. That is, there is a problem that none of the conventional electrical component covers can satisfactorily achieve both electric shock prevention and fire spread prevention.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide an electrical component cover that can satisfactorily achieve both prevention of electric shock and prevention of fire spread.

  In order to solve the above-described conventional problems, the electrical component cover of the present invention is formed of an aluminum alloy, and an anodized film is formed on the surface of the electrical component cover to prevent electric shock. There is an advantage that both the prevention of fire spread and the prevention of fire spread can be satisfactorily achieved.

  According to the electrical component cover of the present invention, both the prevention of electric shock and the prevention of fire spread can be achieved satisfactorily, so that an effect of providing a safe electrical component cover can be obtained.

  According to the first aspect of the present invention, in the electrical component cover that covers the electrical component, a member constituting the electrical component cover is formed of an aluminum alloy, and an anodized film is formed on a surface of the electrical component cover. Since the anodized film has an insulating property and the electrical component cover is formed of an aluminum alloy, it is possible to prevent the spread of fire. Thus, it is possible to provide an electrical component cover that can achieve the above.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the anodized film has a film thickness of 5 μm or more, and the anodized film has durability in addition to insulation. In addition to the effects of the invention according to claim 1, in addition to the effects of the invention according to claim 1, the electrical component cover is made of an aluminum alloy, and in addition to the effect of the invention, the electrical component cover is further damaged when transported or attached. Thus, it is possible to provide an electrical component cover that can prevent the deterioration of the insulating property and can satisfactorily achieve both electric shock prevention and fire spread prevention.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1, the anodized film is a hard anodized film having a film thickness of 20 μm or more. In addition, since it has durability and the electrical component cover is formed of an aluminum alloy, it is possible to prevent the spread of fire. Therefore, in addition to the effect of the invention according to claim 1, the hardness of the coating is further high and the electrical component is covered. It is possible to provide an electrical component cover that can prevent the insulation from being damaged due to scratches generated during transportation and attachment of the product cover, and that can achieve both electric shock prevention and fire spread prevention.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the electrical component is a control board of a refrigeration cycle compressor and / or a refrigeration apparatus using the refrigeration cycle compressor. It is characterized by being a control board, and both the prevention of electric shock and the prevention of fire spread are successfully achieved in the control board of the compressor for the refrigeration cycle and / or the control board of the refrigeration apparatus using the compressor for the refrigeration cycle. An electrical component cover that can be provided can be provided.

  The invention according to claim 5 is the invention according to any one of claims 1 to 3, wherein the electrical component is a protector or a start relay of a compressor for a refrigeration cycle. Therefore, it is possible to provide an electrical component cover that can satisfactorily achieve both electric shock prevention and fire spread prevention in a compressor protector or a start relay.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a partial cross-sectional view when the electrical component cover according to Embodiment 1 of the present invention is applied to an electrical component of a compressor for a refrigeration cycle. In FIG. 1, the hermetic container 101 houses an electric element (not shown) and a compression element driven by the electric element. These electric elements and compression elements constitute a well-known refrigeration cycle and are generally used by being incorporated in a refrigerator, a freezer, a refrigeration / freezer showcase, or the like.

  As shown in the partial sectional view of FIG. 1, a protector 102 and an activation relay 103 as electrical components are attached to the outer wall 101 </ b> A of the sealed container 101. Wiring cables 102A and 103A for electrical connection are connected to the protector 102 and the activation relay 103, respectively.

  The protector 102 is a safety device that cuts off the power supply by a bimetal operation (not shown) when the temperature exceeds a predetermined temperature.

  The electrical component cover 104 has a cover base portion 105 formed of an aluminum alloy, and an anodized film 106 formed on the surface of the cover base portion 105.

  In FIG. 1, the anodic oxide film 106 is formed on the entire surface of the cover base portion 105 of the electrical component cover 104. However, the anodic oxide film 106 may be formed only on the inside of the electrical component cover 104, that is, only on the electrical component side. it can.

  As described above, according to the present embodiment, since the anodic oxide film 106 has electrical insulation and the cover base portion 105 is formed of an aluminum alloy, it is possible to prevent the spread of fire. Both electric shock prevention and fire spread prevention can be achieved satisfactorily.

  When the anodized film 106 has a film thickness of 5 μm or more, it is possible to prevent the insulation from being damaged by scratches generated during the transportation and attachment of the electrical component cover 104. Further, by setting the film thickness to 20 μm or more, the hardness of the anodic oxide film 106 can be increased, and the durability is improved against the scratches generated when the electrical component cover 104 is transported or attached, thereby preventing the insulation from being impaired. be able to.

(Embodiment 2)
FIG. 2 is a partial cross-sectional view of a refrigerator to which the electrical component cover according to Embodiment 2 of the present invention is applied. FIG. 2 is a partial cross-sectional view showing only the upper rear portion of the refrigerator, and a recess 112 is provided on the back surface side of the refrigerator casing 111 that is a refrigeration apparatus. A control board 113 of the refrigerator is arranged.

  An electrical component cover 114 is provided so as to close the recess 112 and cover the control board 113. In this electrical component cover 114, the cover base portion 115 is formed of an aluminum alloy, and an anodized film 116 is formed on the surface of the cover base portion 115.

  Therefore, the same effect described in the first embodiment can be obtained also on the control board of the refrigerator.

  As described above, the electrical component cover that covers the electrical component according to the present invention is formed of an aluminum alloy and the anodic oxide film is formed on the surface of the electrical component cover. Therefore, it is possible to provide a cover for an electrical component that can satisfactorily achieve both preventions. Therefore, the present invention can be used for various electrical component covers that require prevention of electric shock and fire spread.

The fragmentary sectional view of the compressor which shows the application example of the cover of the electrical component in Embodiment 1 of this invention The fragmentary sectional view of the refrigerator which shows the application example of the cover of the electrical component in Embodiment 2 of this invention

Explanation of symbols

102 Protector (electrical equipment)
103 Start relay (electrical equipment)
104,114 Electrical component cover 106,116 Anodized film 113 Control base (electrical component)

Claims (5)

  An electrical component cover for covering an electrical component, wherein the member constituting the electrical component cover is formed of an aluminum alloy, and an anodized film is formed on a surface of the electrical component cover.   The electrical component cover according to claim 1, wherein the anodized film has a thickness of 5 μm or more.   The electrical component cover according to claim 1, wherein the anodized film is a hard anodized film having a thickness of 20 μm or more.   The electrical component cover according to any one of claims 1 to 3, wherein the electrical component is a control substrate of a refrigeration cycle compressor and / or a refrigeration device control substrate using the refrigeration cycle compressor.   The electrical component cover according to any one of claims 1 to 3, wherein the electrical component is a protector or a start relay of a compressor for a refrigeration cycle.

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