JP2017180908A - Electric component box of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric component box of an air conditioner capable of preventing formation of a gap between a lined sheet plate and a lid body.SOLUTION: An electric component box 34 of an air conditioner includes: a resin box body 39 configured to section a terminal block chamber 38 storing a terminal block 37, and having an opening 41 for opening the terminal block 37; and a sheet metal body 45 subjected lining to the box body 39, having an edge folded back to the inside along the opening 41 and wrapped by a resin material 46, and having a convex surface 47 formed in a folded manner at a position of more deeply entering a terminal block chamber 38 than the folded-back resin material 46; and a sheet metal-based lid body 42 fitted into the opening 41, and contacting with the convex surface 47 at the position of more deeply entering the terminal block chamber 38 than the folded-back resin material 46.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an electrical component box of an air conditioner and an air conditioner using the same.

  The air conditioner includes a terminal block as an electrical component. A control line and a power line connected to the outdoor unit are connected to the terminal block. The air conditioner houses a terminal block in a resin electrical component box. The electrical component box has an opening for opening the terminal block.

  The box is lined with sheet metal. The edge of the sheet metal is wrapped with a resin material that is folded inward along the opening. The opening is closed by a sheet metal lid. The resin box receives the lid made of sheet metal with a resin material folded back at the edge of the sheet metal.

JP 2010-261605 A

  The terminal block may be ignited by tracking at the connection portion of the control line or power line. Even if the inside of the box is exposed to high heat, the resin box is protected by sheet metal. However, the resin material folded back between the sheet metal and the lid is exposed to high heat at the opening of the box. When the resin material is deformed, a gap is generated between the sheet metal and the lid. There is concern about fire leaking from the gap.

  An object of the present invention is to provide an electrical component box of an air conditioner that can prevent a gap from being formed between a sheet metal lined and a lid.

  According to one aspect of the present invention, a resin box having an opening that opens a part of the terminal block chamber and defines a terminal block chamber that accommodates the terminal block, and the box includes the opening in the opening. A sheet metal body having an edge that is wrapped with a resin material that is folded inward along, and having a convex surface that is bent at a position that enters the terminal block chamber with respect to the folded resin material, and is fitted into the opening. There is provided an electrical component box of an air conditioner including a sheet metal lid that comes into contact with the convex surface at a position that enters the terminal block chamber rather than the folded resin material.

  When the lid is fitted into the opening of the box, the opening is closed with the lid. The resin box receives the sheet metal lid with a resin material folded back at the edge of the sheet metal. At this time, since the lid body made of sheet metal contacts the sheet metal body lined in the box, high heat in the terminal block chamber is blocked by the sheet metal. The resin material is protected by sheet metal. Formation of a gap between the lined sheet metal and the lid is avoided.

  As described above, according to the disclosed apparatus, formation of a gap between the lined sheet metal and the lid is prevented.

It is a conceptual diagram which shows roughly the structure of the air conditioner which concerns on one Embodiment of this invention. It is a perspective view showing roughly the appearance of the indoor unit concerning one embodiment. It is a disassembled perspective view which shows schematically the structure of the main body of an indoor unit, and an electrical component box. It is an expansion disassembled perspective view of an electrical component box. It is an expansion exploded perspective view of a terminal stand room and a lid. It is an expanded sectional view of the electrical component box along the AA line of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(1) Configuration of Air Conditioner FIG. 1 schematically shows a configuration of an air conditioner 11 according to an embodiment of the present invention. The air conditioner 11 includes an indoor unit 12 and an outdoor unit 13. The indoor unit 12 is installed, for example, on an upper wall surface of an indoor space in a building. In addition, the indoor unit 12 may be installed in a space corresponding to the indoor space. An indoor heat exchanger 14 is incorporated in the indoor unit 12. The outdoor unit 13 includes a compressor 15, an outdoor heat exchanger 16, an expansion valve 17, and a four-way valve 18. The indoor heat exchanger 14, the compressor 15, the outdoor heat exchanger 16, the expansion valve 17 and the four-way valve 18 form a refrigeration circuit 19.

  The refrigeration circuit 19 includes a first circulation path 21. The first circulation path 21 connects the first port 18a and the second port 18b of the four-way valve 18 to each other. The compressor 15 is incorporated in the first circulation path 21. The suction pipe 15a of the compressor 15 is connected to the first port 18a of the four-way valve 18 via a refrigerant pipe. The gas refrigerant is supplied to the suction pipe 15a of the compressor 15 from the first port 18a. The compressor 15 compresses the low-pressure gas refrigerant to a predetermined pressure. The discharge pipe 15b of the compressor 15 is connected to the second port 18b of the four-way valve 18 via a refrigerant pipe. High-pressure gas refrigerant is supplied from the discharge pipe 15 b of the compressor 15 to the second port 18 b of the four-way valve 18. The refrigerant pipe may be a copper pipe, for example.

  The refrigeration circuit 19 further includes a second circulation path 22. The second circulation path 22 connects the third port 18c and the fourth port 18d of the four-way valve 18 to each other. The outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 are incorporated into the second circulation path 22 in order from the third port 18c side. The outdoor heat exchanger 16 exchanges heat energy between the refrigerant passing therethrough and ambient air. The indoor heat exchanger 14 exchanges thermal energy between the refrigerant passing therethrough and ambient air. The second circulation path 22 may be formed by a refrigerant pipe such as a copper pipe.

  A blower fan 23 is incorporated in the outdoor unit 13. The blower fan 23 ventilates the outdoor heat exchanger 16. The blower fan 23 generates an air flow according to the rotation of the impeller, for example. The airflow passes through the outdoor heat exchanger 16. The flow rate of the airflow passing through is adjusted according to the rotational speed of the impeller.

  A blower fan 24 is incorporated in the indoor unit 12. The blower fan 24 ventilates the indoor heat exchanger 14. The blower fan 24 generates an air flow according to the rotation of the impeller. Indoor air is sucked into the indoor unit 12 by the action of the blower fan 24. The indoor air passes through the indoor heat exchanger 14 and exchanges heat with the refrigerant. The heat-exchanged cold air or warm air flow is blown out from the indoor unit 12. The flow rate of the airflow passing through is adjusted according to the rotational speed of the impeller.

  When the cooling operation is performed in the refrigeration circuit 19, the four-way valve 18 connects the second port 18b and the third port 18c to each other and connects the first port 18a and the fourth port 18d to each other. Therefore, high-temperature and high-pressure refrigerant is supplied to the outdoor heat exchanger 16 from the discharge pipe 15 b of the compressor 15. The refrigerant flows through the outdoor heat exchanger 16, the expansion valve 17, and the indoor heat exchanger 14 in order. The outdoor heat exchanger 16 radiates heat from the refrigerant to the outside air. The refrigerant is decompressed to a low pressure by the expansion valve 17. The decompressed refrigerant absorbs heat from the surrounding air in the indoor heat exchanger 14. Cold air is generated. The cold air is blown out into the indoor space by the function of the blower fan 24.

  When the heating operation is performed in the refrigeration circuit 19, the four-way valve 18 connects the second port 18b and the fourth port 18d to each other and connects the first port 18a and the third port 18c to each other. A high-temperature and high-pressure refrigerant is supplied from the compressor 15 to the indoor heat exchanger 14. The refrigerant flows through the indoor heat exchanger 14, the expansion valve 17, and the outdoor heat exchanger 16 in order. The indoor heat exchanger 14 radiates heat from the refrigerant to the surrounding air. Warm air is generated. Warm air is blown into the indoor space by the function of the blower fan 24. The refrigerant is decompressed to a low pressure by the expansion valve 17. The decompressed refrigerant absorbs heat from the surrounding air in the outdoor heat exchanger 16. Thereafter, the refrigerant returns to the compressor 15.

(2) Configuration of Indoor Unit FIG. 2 schematically shows the appearance of the indoor unit 12 according to an embodiment. The indoor unit 12 includes a main body 25. The indoor heat exchanger 14 is supported on the main body 25. A front grille 26 covers the front surface (front surface) of the main body 25 so as to be freely opened and closed.

  An air outlet 28 is formed in the bottom plate 27 of the main body 25. The blower outlet 28 is opened toward the room. The main body 25 can be fixed to the wall surface of the room, for example, on the back side. The blower outlet 28 blows out the cool air or the warm air generated by the indoor heat exchanger 14.

  A pair of front and rear wind direction plates 29 a and 29 b are arranged at the outlet 28. The up-and-down wind direction plates 29a and 29b can rotate around the horizontal axis. The vertical airflow direction plates 29a and 29b can open and close the air outlet 28 according to the rotation. The direction of the airflow to be blown out is changed according to the angle of the vertical airflow direction plates 29a and 29b.

  A suction port 33 is formed in the top plate 32 of the main body 25. Air flowing into the indoor heat exchanger 14 is taken in from the suction port 33. A plurality of air filter assemblies (not shown) are detachably attached to the main body 25 in front of the indoor heat exchanger 14 below the top plate 32.

  As shown in FIG. 3, an electrical component box 34 is attached to the main body 25. The electrical component box 34 includes a box body 35 that houses the control board and the power supply unit. The front surface of the box body 35 is closed with a resin wiring cover 36. The wiring cover 36 is covered with the front grille 26.

The blower fan 24 is incorporated between the heat exchanger 14 and the air outlet 28. The electrical component box 34 is disposed on the right side of the heat exchanger 14. That is, the convex surface 47 described later is disposed on the heat exchanger 14 side of the electrical component box 34. The flow of air on the heat exchanger 14 side of the electrical component box 34 is hindered. The hot air in the electrical component box 34 is not attracted by the airflow passing through the heat exchanger 14.

  As shown in FIGS. 4 to 6, the electrical component box 34 includes a resin box 39 that partitions a terminal block chamber 38 that houses the terminal block 37. The resin box 39 may be continuous from the box body 35, for example. The box 39 has an opening 41 that opens a part of the terminal block chamber 38. A sheet metal lid 42 is fitted into the opening 41. The lid 42 functions as an inner lid of the wiring cover 36.

  The terminal block 37 includes three terminals 43 on the opening 41 side. A control line and a power line connected to the outdoor unit 13 are inserted into each terminal 43. The cable including the control line and the power line is drawn out from the lower end of the terminal base chamber 38 to the outside. The cable can be held by the cable clamp 44 when pulled out. The terminal board 37 is connected to the wiring of the control board and the power supply unit from behind. Thus, the terminal block 37 connects the outdoor unit 13 to the control board and the power supply unit.

  A sheet metal body 45 is lined on the resin box 39. The sheet metal body 45 surrounds other than the front side of the terminal block 37. The edge of the sheet metal body 45 is locked to the resin material 46 along the opening 41. A convex surface 47 is bent and formed on the sheet metal body 45 at a position where it enters the terminal block chamber 38 more than the resin material 46. Here, the convex surface 47 is disposed on the side wall adjacent to the heat exchanger 14 in the main body 25. The convex surface 47 protrudes from the inner surface of the box 39 to the terminal block 37 side. The convex surface 47 is provided from the upper surface to the lower surface of the terminal block chamber 38. The lid 42 made of sheet metal is in contact with the convex surface 47 at one side edge 42 a at a position where it enters the terminal block chamber 38 rather than the folded resin material 46.

  When the lid body 42 is fitted into the opening 41 of the box body 39, the opening 41 is closed with the lid body 42. The resin box 39 receives the sheet metal lid 42 with the resin material 46 folded back at the edge of the sheet metal 45. At this time, since the sheet metal lid 42 contacts the sheet metal body 45 lining the box 39, high heat in the terminal block chamber 38 is blocked by the sheet metal. The resin material 46 is protected by sheet metal. Formation of a gap between the lined sheet metal body 45 and the lid body 42 is avoided.

  DESCRIPTION OF SYMBOLS 11 Air conditioner, 34 ... Electrical component box, 37 ... Terminal block, 38 ... Terminal block room, 39 ... Box body, 41 ... Opening, 42 ... Lid body, 45 ... Sheet metal body, 46 ... Resin material, 47 ... Convex surface.

Claims (2)

A resin box having an opening for opening a part of the terminal block chamber, defining a terminal block chamber for accommodating the terminal block;
The box body has an edge that is wrapped with a resin material folded inward along the opening, and has a convex surface that is bent and formed at a position that enters the terminal block chamber rather than the folded resin material. Body,
An electrical component box, comprising: a sheet metal lid that comes into contact with the convex surface at a position that is fitted into the opening and enters the terminal block chamber rather than the folded resin material.   An air conditioner comprising a blower and wherein the convex surface of the electrical component box according to claim 1 is provided on a blower side surface of the electrical component box.

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