JP4587901B2 - Power supply wire connection structure and air conditioner - Google Patents

Description

  The present invention relates to a power supply wire connection structure and an air conditioner used for an outdoor unit of an air conditioner, for example.

  Conventionally, as an air conditioner, as shown in FIG. 5, there is one that supplies electricity from an indoor unit 101 to an outdoor unit 102 via a power supply wire 103. An electrical component box 104 is installed in the outdoor unit 102.

  FIG. 6 shows a schematic view of the outdoor unit 102 with the surface side wall and the top plate removed.

  In the outdoor unit 102, one end of the in-machine wiring 106 enters the electrical component box 104 and is connected to a printed circuit board (not shown). On the other hand, the other end of the in-machine wiring 106 goes out of the electrical component box 104 and is electrically connected to the end of the power supply wire 103 on the outdoor unit 102 side via the terminal block 105.

  The terminal block 105 is fixed to the outer wall surface 109 of the electrical component box 104 with screws, and as shown in FIG. 7, the in-machine wiring connection portion 107 through which the other end of the in-machine wiring 106 can be inserted and removed, and the power supply wire 103 Of the outdoor unit 102 and a power supply wire connecting portion 108 that can be fixed with a screw.

  By the way, according to the conventional air conditioner, the installer electrically connects the end of the power supply wire 103 on the outdoor unit 102 side and the power supply wire connection portion 108, but this connection may be insufficient. is there. That is, a connection failure may occur between the end of the power supply wire 103 on the outdoor unit 102 side and the power supply wire connection portion 108. For this reason, there is a possibility that a fire may occur due to heat generation of the power supply wire connecting portion 108.

  If a fire breaks out due to heat generated by the power supply cable connecting portion 108, the in-machine wiring 106 is in the vicinity of the power supply cable connecting section 108. Therefore, the fire in the power supply cable connecting section 108 easily burns into the in-machine wiring 106, and the in-machine wiring 106 is Fire spread.

Therefore, the conventional air conditioner has a problem that a fire due to heat generated by the power supply wire connecting portion 108 may lead to an electric fire.
JP 2000-353555 A

  Then, the subject of this invention is providing the power wire connection part structure and air conditioner which can prevent generation | occurrence | production of an electric fire.

In order to solve the above-mentioned problem, the power supply wire connecting portion structure of the present invention is
A plate member made of a non-combustible material and having a through hole;
A flame-retardant wiring board that is attached to the plate member so as to close the through hole of the plate member, and that each part is exposed on both the front and back surfaces of the plate member;
External connection terminals provided on the wiring board so as to be located on the surface side of the plate member;
The wiring board is provided so as to be located on the back side of the plate member, and includes an internal connection terminal electrically connected to the external connection terminal ,
The lower portion of the plate member is characterized that you have hinge is provided.

  According to the power wire connecting portion structure of the above configuration, the external connection terminal of the wiring board is located on the front surface side of the plate member, and the internal connection terminal of the wiring board is located on the back surface side of the plate member. Because the plate member made of is located between the external connection terminal and the internal connection terminal, even if a fire occurs due to heat generation of the external connection terminal, the external connection is made to the member on the internal connection terminal side (back side) of the plate member The terminal fire is hard to burn.

  Accordingly, it is possible to prevent the members on the internal connection terminal side of the plate member from spreading by the plate member and prevent the occurrence of an electric fire.

Moreover, since the fire due to the heat generated by the external connection terminal does not lead to an electric fire, the safety against the electric fire can be improved.
Moreover, since the hinge is provided in the lower part of the said plate member, the plate member can be rotated and the member provided in the back surface of the plate member can be exposed. Therefore, maintenance of the member provided on the back surface of the plate member can be easily performed.

In the power supply wire connection part structure of one embodiment,
The plate member is a sheet metal.

  According to the power supply wire connecting portion structure of the above embodiment, since the plate member is a sheet metal, an increase in manufacturing cost can be prevented.

In the power supply wire connection part structure of one embodiment,
The plate member is provided with an eaves that bends from the upper part of the plate member to the front side and covers the upper surface of the wiring board.

  According to the power supply wire connection part structure of the above embodiment, the plate member is provided with an eaves that is bent from the upper part of the plate member to the front side and covers the upper surface of the wiring board. The fire of the external connection terminal can be made difficult to burn for a certain member.

The air conditioner of the present invention is
A refrigerant circuit formed by sequentially connecting a compressor, a condenser, an expansion mechanism, and an evaporator;
It has the above-mentioned power supply wire connection part structure, and is provided with the electrical equipment box which stores the control parts which control the above-mentioned refrigerant circuit.

  According to the air conditioner having the above-described configuration, the electrical component box has a power supply wire connecting portion structure, and thus safety against electric fire can be improved.

  According to the power supply wire connecting portion structure of the present invention, the external connection terminal of the wiring board is located on the front surface side of the plate member, and the internal connection terminal of the wiring board is located on the back surface side of the plate member. Because the plate member is located between the external connection terminal and the internal connection terminal, even if a fire occurs due to the heat generated by the external connection terminal, it is possible to spread the fire to the member on the internal connection terminal side (back side) of the plate member. It can be prevented with members, and the occurrence of an electric fire can be prevented.

  Moreover, since the fire due to the heat generated by the external connection terminal does not lead to an electric fire, the safety against the electric fire can be improved.

  According to the power wire connecting portion structure of one embodiment, since the plate member is a sheet metal, an increase in manufacturing cost can be prevented.

  According to the power supply wire connecting portion structure of one embodiment, the plate member is provided with an eaves that bends from the upper part of the plate member to the front side and covers the upper surface of the wiring board. The fire of the external connection terminal can be made difficult to burn for a certain member.

According to the power supply wire connecting portion structure of one embodiment, the hinge is provided at the lower part of the plate member, thereby rotating the plate member to expose the member provided on the back surface of the plate member. since it can perform the maintenance of the member provided on the back surface of the plate member easily.

  According to the air conditioner of the present invention, since the electrical component box has a power supply wire connecting portion structure, safety against an electric fire can be improved.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The power supply wire connecting portion structure of the present invention will be described in detail below with reference to the illustrated embodiments.

  In FIG. 1, the schematic block diagram of the air conditioner of one embodiment of this invention is shown.

  The air conditioner includes an indoor unit 51, an outdoor unit 52, and a refrigerant circuit 53.

  An indoor heat exchanger 54 is disposed in the indoor unit 51. The indoor heat exchanger 54 functions as an evaporator during cooling operation, and functions as a condenser during heating operation.

  In the outdoor unit 52, an outdoor heat exchanger 55, an expansion mechanism 56, a compressor 57, and an electrical component box 58 are arranged. The outdoor heat exchanger 55 functions as a condenser during cooling operation, and functions as an evaporator during heating operation. The electrical component box 58 houses a printed circuit board 59 that controls the refrigerant circuit 53.

  The refrigerant circuit 53 has an indoor heat exchanger 54, a compressor 57, an outdoor heat exchanger 55, and an expansion mechanism 56 connected in sequence.

  Although not shown, a blower is installed inside each of the indoor unit 51 and the outdoor unit 52.

  FIG. 2 shows a schematic cross-sectional view of the power supply connection structure included in the electrical component box 58.

  The power wire connecting portion structure is provided on one side wall 1 of the electrical component box 58. More specifically, the power supply wire connecting portion structure includes a side wall 1, a flame retardant terminal block 2 fixed to the side wall 1 with screws, an external connection terminal 41 and an internal connection terminal 42 provided on the terminal block 2. And. The side wall 1 is an example of a plate member. The terminal block 2 is an example of a wiring board.

  The side wall 1 has a through hole 6 into which a part of the terminal block 2 is inserted. The side wall 1 is made of sheet metal.

  The terminal block 2 includes a housing 3, a conductive terminal 4 having a U-shaped cross section attached to the housing 3, and a terminal screw 5 screwed into a screw hole 44 provided in the conductive terminal 4. ing. Such a terminal block 2 is attached to the side wall 1 so as to close the through hole 6 of the side wall 1. In the terminal block 2, a part of the housing 3 is exposed on both the front and back surfaces of the side wall 1. The housing 3 is provided with a recess 31 into which the shaft 52 of the terminal screw 5 is inserted.

  The conductive terminal 4 has an external connection terminal 41 located on the front side of the side wall 1 and an internal connection terminal 42 located on the back side of the side wall 1. The external connection terminal 41 and the internal connection terminal 42 are electrically connected to each other.

  The terminal screw 5 includes a head portion 51 and a shaft portion 52 connected to the head portion 51. The shaft portion 52 passes through the spring washer 9 and the square seat 10.

  In FIG. 3, the schematic which looked at the said side wall 1 from the front side is shown.

  A contractor electrically connects the power supply wire 7 to the external connection terminal 41. Specifically, after the installer has inserted the round terminal 71 provided at one end of the power supply wire 7 between the head 51 of the terminal screw 5 and the external connection terminal 41 of the conductive terminal 4, Tighten the terminal screw 5. Thereby, the head 51 and the external connection terminal 41 sandwich the round terminal 71 (see FIG. 1), and the external connection terminal 41 and the power supply wire 7 are brought into conduction.

  The side wall 1 is provided with an eave 11 that bends from the upper part of the side wall 1 to the front side and covers the upper surface of the terminal block 2. A hinge 12 is provided at the lower part of the side wall 1.

  In FIG. 4, the schematic which looked at the said side wall 1 from the back side is shown.

  The manufacturer electrically connects the harness 8 to the internal connection terminal 42. Specifically, the manufacturer fits the connector 81 provided at one end of the harness 8 to the internal connection terminal 42. Thereby, the said internal connection terminal 42 and the harness 8 will be in a conduction | electrical_connection state.

  The other end of the power supply wire 7 is connected to the indoor unit 51. The other end of the harness 8 is connected to a printed circuit board 59 in the electrical component box 58.

  According to the air conditioner having the above configuration, the external connection terminal 41 of the terminal block 2 is located on the front side of the side wall 1 and the internal connection terminal 42 of the terminal block 2 is located on the back side of the side wall 1. Since the side wall 1 made of sheet metal is positioned between the external connection terminal 41 and the internal connection terminal 42, even if a fire occurs due to heat generation of the external connection terminal 41, the side wall 1 is on the internal connection terminal 42 side (back side). The fire of the external connection terminal 41 is hard to burn on the member.

  Therefore, the side wall 1 can prevent the members on the side of the internal connection terminal 42 of the side wall 1 from spreading and prevent the occurrence of an electric fire.

  Moreover, since the fire due to the heat generated by the external connection terminal 41 does not lead to an electric fire, the safety against the electric fire can be improved.

  Further, since the external connection terminal 41 and the internal connection terminal 42 are electrically connected to each other, the power supply on the surface side of the side wall 1 can be obtained without drawing the harness 8 on the back side of the side wall 1 to the surface side of the side wall 1. A harness 8 on the back side of the side wall 1 can be electrically connected to the electric wire 7.

  Further, since the external connection terminal 41 is provided on the surface side of the side wall 1 and the internal connection terminal 42 is not provided, the terminal block 2 is arranged on the surface side of the side wall 1 as compared with the case where the terminal block 105 of FIG. 6 is used. There is little space for it. Therefore, the degree of freedom of installation of the terminal block 2 can be increased.

  Moreover, since the said side wall 1 is a sheet metal, the increase in manufacturing cost can be prevented.

  Further, the eaves 11 provided on the upper portion of the side wall 1 can prevent the fire due to the heat generated by the external connection terminals 41 from being burned to the members above the terminal block 2.

  Moreover, since the hinge 12 is provided in the lower part of the said side wall 1, the side wall 1 can be rotated in the arrow R direction of FIG. 3, and the member provided in the back surface of the side wall 1 can be exposed. Therefore, maintenance of the member provided on the back surface of the side wall 1 can be easily performed.

  In the above embodiment, one side wall 1 of the electrical component box 58 is a sheet metal, but is not limited to this. That is, the one side wall 1 of the electrical component box 58 may be formed of a nonflammable material.

  Moreover, although the said terminal block 2 was being fixed to the one side wall 1 of the electrical component box 58, you may fix to the other member in an outdoor unit. However, the other member is made of a nonflammable material.

  Moreover, in the said embodiment, although the terminal block 2 was fixed to the side wall 1 with the screw | thread, although not shown in figure, a flexible engaging claw is provided in a terminal block and this terminal block is inserted in a through-hole. Then, the power supply wire may be sandwiched between the engaging claw and the terminal block main body.

  In the above embodiment, the terminal screw 5 is used to fix the round terminal 71 provided at one end of the power supply wire 7 to the external connection terminal 41 of the conductive terminal 4. However, you may fix the terminal provided in one edge part of a power supply wire to the external connection terminal of an electroconductive terminal. That is, for the connection structure between the terminal provided at one end of the power supply wire and the external connection terminal of the conductive terminal, the same structure as the screwless terminal block of the industrial terminal block (JIS C 2811) is used. Also good.

  More specifically, a spring member and an external connection terminal located on the surface side of the side wall are provided on the terminal block, and when one end of the power supply wire is inserted between the spring member and the external connection terminal, the spring The one end of the power supply wire may be pressed against the external connection terminal by the spring force of the member, and the one end of the power supply wire may be connected to the external connection terminal.

  Further, the terminal block may be provided with a push button located on the surface side of the side wall, and when the push button is pushed, one end of the power supply wire can be separated from the external connection terminal. . That is, when the push button is pressed, the connection between the one end of the power supply wire and the external connection terminal may be released.

  In the above embodiment, the power supply wire connection portion structure is provided in the electrical component box 58 in the outdoor unit 52, but the power supply wire connection portion structure may be provided in the electrical component box in the indoor unit 51.

  The power supply wire connecting portion structure can be used for an indoor unit and an outdoor unit of a separate air conditioner, as well as an indoor unit and an outdoor unit of a multi-type air conditioner.

  Moreover, it cannot be overemphasized that this invention can be used also for various electric equipments other than an air conditioner.

FIG. 1 is a schematic configuration diagram of an air conditioner according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the power supply wire connecting portion structure according to the embodiment of the present invention. FIG. 3 is a schematic view of one side wall of the electrical component box having the power supply wire connecting portion structure as viewed from the front side. FIG. 4 is a schematic view of one side wall of the electrical component box as viewed from the back side. FIG. 5 is a schematic configuration diagram of a conventional air conditioner. FIG. 6 is a schematic view of the inside of the outdoor unit of the conventional air conditioner. FIG. 7 is a schematic plan view of the conventional terminal block.

DESCRIPTION OF SYMBOLS 1 Side wall 2 of electrical component box Terminal block 4 Conductive terminal 6 Through hole 11 Eaves 12 Hinge 41 External connection terminal 42 Internal connection terminal 53 Refrigerant circuit 57 Compressor 54 Indoor side heat exchanger 55 Outdoor heat exchanger 56 Expansion mechanism 58 Electrical component box 59 Printed circuit board

Claims (4)

A plate member (1) made of a non-combustible material and having a through hole (6);
A flame-retardant wiring board which is attached to the plate member (1) so as to close the through hole (6) of the plate member (1) and which is partially exposed on both the front and back surfaces of the plate member (1). (2) and
An external connection terminal (41) provided on the wiring board (2) so as to be positioned on the surface side of the plate member (1);
The wiring board (2) includes an internal connection terminal (42) provided on the back side of the plate member (1) and electrically connected to the external connection terminal (41) .
Power wire connection portion structure characterized that you have hinge (12) is provided in a lower portion of the plate member (1). In the power wire connecting portion structure according to claim 1,
The plate member (1) is a sheet metal. In the power wire connecting portion structure according to claim 1,
The plate member (1) is provided with an eaves (11) which is bent from the upper part of the plate member (1) to the front side and covers the upper surface of the wiring board (2). Connection structure. A refrigerant circuit (53) formed by sequentially connecting a compressor (57), a condenser (54, 55), an expansion mechanism (56), and an evaporator (54, 55);
It has the power supply wire connection part structure described in any one of Claims 1 thru | or 3 , and is equipped with the electrical component box (58) which accommodates the control components (59) which control the said refrigerant circuit (53). A featured air conditioner.

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