JP5465167B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner that can protect a control board from a fire caused by an external fire or a fire when intentionally lit.

  In the outdoor unit of an air conditioner, a through hole is formed on one side surface, and a terminal block having an outwardly arranged terminal block that serves as an electrical connection between the outside and the inside of the outdoor unit body is formed in the through hole. A mounting plate is installed, and the outside is covered with a resin service panel. The service panel is provided for the purpose of making the through hole difficult to see from the outside, and does not close the through hole.

  In addition, a valve of the refrigerant pipe protrudes outwardly from the through hole on one side of the outdoor unit, and the outside is covered with a resin valve cover.

  Therefore, when an external fire or a resin part (service panel or valve cover) is intentionally lit, a flame may enter through the through hole on the side of the outdoor unit and the internal control board may burn. . When the internal control board burns in this way, it is difficult to prove that the cause of the fire is not a fire from the inside of the air conditioner even if the fire is due to an external fire.

  Therefore, by providing a wall surface in a cylindrical shape on the metal terminal block mounting plate so as to cover the terminal block, the cylindrical shape provided to cover the terminal block even in the event of a fire due to an external cause such as arson There has been proposed a metal wall portion which can prevent the flame portion from spreading to other parts such as an electrical component storage box (see, for example, Patent Document 1).

JP 2006-145082 A (page 3, paragraph [0018], FIGS. 1 to 6)

  However, even in the case where the terminal block is covered with a cylindrical metal wall surface, the terminal block mounting plate has an opening at its upper end for drawing out the lead wire from the inside of the outdoor unit body. Remained largely open. For this reason, when an external fire such as arson occurs, a flame may enter from the opening of the terminal block mounting plate and the internal control board may burn.

  The present invention has been made to solve the above-described problems, and protects the control board from a fire caused by an external fire or a fire when intentionally ignited, and the cause of the fire is the inside of the air conditioner. It aims to be able to prove that it is not a fire from.

An outdoor unit of an air conditioner according to the present invention includes an outdoor unit body having a through hole on a side surface, a control board support for holding a control board, a terminal block to which a lead wire from the control board is connected, and a lead wire It has an opening to pass through, is placed facing the through hole of the outdoor unit body, and is made of a metal that is placed between the control board and the terminal board mounting plate. A fire shielding cover, and the fire shielding cover includes an opening shielding wall that allows the lead wire to pass through the opening of the terminal block mounting plate, and a control board shielding wall that covers the terminal block mounting plate side of the control board from below. The opening shielding wall is provided at the tip of a horizontal wall configured to protrude from the terminal block installation surface on which the terminal block of the terminal block mounting plate is installed toward the outside of the outdoor unit body through the opening. It is provided .

In the outdoor unit of the air conditioner of the present invention, a metal fire shielding cover is provided between the control board and the terminal block mounting plate, and the lead wire is provided in the opening portion of the terminal block mounting plate. An opening shielding wall that covers the terminal board and a control board shielding wall that covers the terminal board mounting plate side of the control board from below is provided . The opening shielding wall is a terminal block on which the terminal block mounting board terminal block is installed. Since it is provided at the front end of the horizontal wall configured to protrude from the installation surface through the opening to the outside of the outdoor unit body , the opening shielding wall protrudes toward the outside of the outdoor unit body, The distance between the opening shielding wall and the control board is increased, and a flame that is intended to spread to the control board via the lead wire can be prevented by the opening shielding wall and the control board shielding wall. For this reason, the control board fixed to the control board support can be protected from the flame, and fire information can be correctly disclosed and provided.

It is a perspective view which shows the outline of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is a top view which shows the outdoor unit of the air conditioner which concerns on embodiment of this invention in the state which removed the top plate. It is a top view which shows the outdoor unit of the air conditioner which concerns on embodiment of this invention in the state which removed the top plate, the front plate, and the electrical equipment storage box. It is a disassembled perspective view of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is a perspective view which shows the fire shielding cover of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is a perspective view which shows the state which attached the fire shielding cover and the terminal block attachment board to the electrical equipment storage box of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is a disassembled perspective view of the electrical equipment storage box, the fire shielding cover, and the terminal block mounting plate of the outdoor unit of the air conditioner according to the embodiment of the present invention. It is a front view which shows the state which attached the fire shielding cover and the terminal block attachment board to the electrical equipment storage box of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is sectional drawing of the front view which shows the state which attached the fire shielding cover and the terminal block attachment board to the electrical equipment storage box of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is an expanded sectional view of the A section of FIG. It is a side view which shows the state which attached the fire shielding cover and the terminal block attachment board to the electrical equipment storage box of the outdoor unit of the air conditioner which concerns on embodiment of this invention. It is a perspective view which shows the attachment state of the fire shielding cover to the electrical equipment storage box of the outdoor unit of the air conditioner concerning the embodiment of the present invention from the back side. It is a perspective view which shows the attachment state of the fire shielding cover and the terminal block attachment board to the electrical equipment storage box of the outdoor unit of the air conditioner concerning the embodiment of the present invention from the back side.

The present invention will be described below with reference to illustrated embodiments.
FIG. 1 is a perspective view showing an outline of an outdoor unit of an air conditioner according to an embodiment of the present invention. FIG. 2 is a plan view showing the outdoor unit of the air conditioner according to the embodiment of the present invention with the top plate removed. FIG. 3 is a plan view showing the outdoor unit of the air conditioner according to the embodiment of the present invention with the top plate, the front plate, and the electrical component storage box removed. FIG. 4 is an exploded perspective view of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 5 is a perspective view showing a fire shielding cover of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 6 is a perspective view showing a state in which a fire shielding cover and a terminal block mounting plate are attached to the electrical component storage box of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 7 is an exploded perspective view of the electrical component storage box, the fire shielding cover, and the terminal block mounting plate of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 8 is a front view showing a state in which the fire shielding cover and the terminal block mounting plate are attached to the electrical component storage box of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 9 is a front sectional view showing a state in which the fire shielding cover and the terminal block mounting plate are attached to the electrical component storage box of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 10 is an enlarged cross-sectional view of a portion A in FIG. FIG. 11 is a side view showing a state in which the fire shielding cover and the terminal block mounting plate are attached to the electrical component storage box of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 12 is a perspective view showing the attachment state of the fire shielding cover to the electrical component storage box of the outdoor unit of the air conditioner according to the embodiment of the present invention from the back side. FIG. 13: is a perspective view which shows the attachment state of the fire shielding cover and the terminal block attachment board to the electrical equipment storage box of the outdoor unit of the air conditioner which concerns on embodiment of this invention from the back side.

  As shown in FIGS. 1 to 4, the outdoor unit of an air conditioner according to an embodiment of the present invention has a box shape surrounded by a front plate 4, a side plate 9, a top plate 3, and a bottom plate 13 having openings. Have. The bottom plate base 2 is attached at two locations below the bottom plate 13. An ice pillar guard 11 that suppresses the generation of ice pillars is attached to the fan guard 1 that covers the opening of the front board 4 at the opening of the front plate 4. The front plate 4 is formed with holes 4a and 4b at two upper and lower portions, the hooks of the fan guard 1 are fitted into these holes 4a and 4b, and the upper part is fixed to the front plate 4 with screws. ing.

  A through hole 9 a is formed in the side plate 9 at an upper position corresponding to the terminal block mounting plate 20 installed in the outdoor unit main body. The lower edge of the through hole 9a of the side plate 9 is engaged with the lower part of the terminal block mounting plate 20 that is vertically attached to the electrical component storage box 10 and supports the electrical component storage box 10 that is horizontally mounted. A through hole 9 a portion of the side plate 9 is covered with a service panel 5 attached in parallel to the side plate 9. Further, a notch 9b is formed at a lower position of the side plate 9, and is in close contact with the sheet metal part to which the valve 27 of the refrigerant pipe is fixed. The notch 9b portion of the side plate 9 is covered with a valve cover 6 attached in parallel to the side plate 9.

  On the upper surface of the bottom plate 13, the fan support 7 is attached perpendicularly to the bottom plate 13, and the fan 12 is fixed to the central portion of the fan support 7 so as to face the front plate 4 side. In addition, on the back side of the bottom plate 13, a heat exchanger 8 that is placed perpendicular to the bottom plate 13 and bent into an L shape so as to cover one side surface and the back side is disposed. In addition, a compressor 26, a pipe 25, and the like are disposed on the upper surface of the bottom plate 13, and a partition plate 24 is disposed perpendicular to the bottom plate 13 so as to block the compressor 26 side and the fan 12 side.

  The lower surface of the heat sink support 18 shown in FIG. 6 rides on the upper part of the partition plate 24, and the square hole 28 and the convex part of the electrical component storage box 10 shown in FIG.

  The electrical component storage box 10 is horizontally arranged as shown in FIGS. 2 and 4. As shown in FIGS. 6 to 9, the control board 22, the control board support 15, the terminal block mounting plate 20, the fire shielding cover 19, The control board support cover 16, the heat sink 17, the heat sink support 18, the heat sink holder 23, and the terminal block 21 are configured.

  More specifically, the electric component storage box 10 is configured such that the control board 22 is attached below the control board support 15. That is, the control board 22 is inserted into a groove formed in the control board support 15 and is fixed by a claw portion of the control board support 15 and a screw.

  Further, a frame is formed on the upper portion of the control board support 15, and a control board support cover 16 is attached so as to fit outside the frame, and is fixed by four claw portions (not shown). ing.

  The heat sink 17 is fixed to the control board 22 on the fan 12 side, and the heat sink 17 is surrounded by a heat sink holder 23 and a heat sink support 18.

  The heat sink holder 23 has a claw portion (not shown) and is fixed by being hooked inside the opening of the heat sink support 18. In a state where the heat sink holder 23 and the heat sink support 18 are fitted, a claw portion (not shown) provided on the control board support 15 and the side surface 2 of the heat sink support 18 are formed so as to surround the heat sink 17 in the opening. It is fixed by engaging a square hole (not shown) opened at a location. In the following description, the words “vertical” and “horizontal” are used, but this is for convenience and does not strictly require “vertical” or “horizontal”.

  The fire shielding cover 19 is made of sheet metal as shown in FIGS. 5 to 13 and is disposed in a space between the control board 22 and the terminal block mounting plate 20 at a position opposite to the position of the heat sink 17. Yes. The fire shielding cover 19 has holes 19a, 19b, 19c at three locations and a recess 19d at one location. Of these, the holes 19a and 19d are protrusions on the control board support 15 side. Each part (not shown) is inserted and positioned. The holes 19b and 19c are fixing portions to the control board support 15 by screwing. The fire shielding cover 19 has a control board shielding wall 19e for covering the terminal board mounting plate side of the control board from below, and in a lead wire drawing opening 20c formed by the terminal board mounting board 20 described later. An opening shielding wall 19h that covers the opening 20c so as to pass through the lead wire is formed. The control board shielding wall 19e is connected to the opening shielding wall 19h in a staircase pattern through the vertical wall 19f and the horizontal wall 19g. In addition, among the edges of the sheet metal constituting the fire shielding cover 19, a portion (for example, B portion) with which the lead wire 14 may come into contact is subjected to contact bending so that the edge portion is eliminated, and the lead wire 14 is There is no problem when touching. In the vicinity of the fire shielding cover 19, a terminal block mounting plate 20 is vertically attached to the control board support 15.

  As shown in FIGS. 6 to 10, 11, and 13, the terminal block mounting plate 20 has a terminal block installation surface 20 d for installing the terminal block 21 outward. Both side walls 20e and 20f sandwiching the terminal block installation surface 20d partially extend upward beyond the upper end of the terminal block installation surface 20d, and these extended portions serve as control boards for the electrical component storage box 10. Attachment portions 20a and 20b to the support 15 are provided. Between these attachment parts 20a and 20b, it is comprised as the opening part 20c which lets the lead wire 14 from the control board 22 pass. The lead wire 14 from the control board 22 is connected to the terminal block 21 and is directed over the terminal block installation surface 20d toward the upper control board 22. In addition, a circular window 30 for confirming blinking of the LEDs provided on the control board 22 is formed on the terminal block mounting plate 20. The window 30 is provided for a serviceman to identify a problem by the blinking pattern of the LEDs.

  The upper part immediately after the window 30 of the terminal block mounting plate 20 is covered with the control board shielding wall 19e of the fire shielding cover 19, and even if a flame enters from the window 30, the control board shielding wall 19e The spread of fire to the control board 22 is prevented.

  Further, as shown in FIG. 10, the horizontal wall 19g of the fire shielding cover 19 and the opening shielding wall 19h protrude into the opening 20c, and the opening shielding wall 19h is located at the positions of the mounting portions 20a and 20b of the terminal block mounting plate 20. And is configured to extend upward. Thereby, most of the opening 20c (particularly the upper part of the opening) of the terminal block mounting plate 20 is covered by the opening shielding wall 19h of the fire shielding cover 19 leaving a slight gap through which the lead wire can pass. It has become. Further, the distance between the horizontal wall 19g of the fire shielding cover 19 and the opening shielding wall 19h projecting into the opening 20c (here, the projecting dimension is set to 27 mm, for example) is increased. Further, the effect of preventing the spread of flame can be further enhanced.

  In the outdoor unit of the air conditioner according to the embodiment of the present invention, the fire shielding cover 19 includes an opening shielding wall 19h protruding into the opening 20c for drawing out the lead wire of the terminal block mounting plate 20 and a horizontal surface as shown in FIG. A wall 19g and a vertical wall 19f partially overlapping with a clearance of 1 mm on the back side of the terminal block installation surface 20d of the terminal block mounting plate 20 are provided. The opening shielding wall 19h has an upper portion from the middle portion of the opening shielding wall 19h to the opening side, that is, the back surface, in order to avoid applying excessive tension to the lead wire 14 connecting the terminal block 21 and the control board 22. It is formed on a slope inclined about 15 ° to the rear side. The distance between the protruding end from the terminal block installation surface 20d of the terminal block mounting plate 20 to the lead wire drawing opening 20c of the opening shielding wall 19h is about 27 mm, and the service panel 5 side from the terminal block installation surface 20d. It has a structure that protrudes. For this reason, the upper part of the terminal block 21 is blocked by the horizontal wall 19 g of the fire shielding cover 19, and the flame spread to the upper part of the terminal block 21 can be prevented.

  Further, the horizontal wall 19g orthogonal to the opening shielding wall 19h and the vertical wall 19f is arranged to be located approximately 13 mm above the upper end of the terminal block installation surface 20d of the terminal block mounting plate 20. As a result, a working space can be secured, and the workability when the lead wire 14 is attached is easily secured.

  Further, a height difference of about 5 mm is generated between the surface of the control board shielding wall 19e of the fire shielding cover 19 and the upper end of the terminal block installation surface 20d of the terminal block mounting plate 20, and this portion is a vertical wall. By overlapping with 19f, it is possible to prevent the flame from entering the control board 22 side.

  Usually, when the service panel 5 burns, it burns out to the lead wire 14 connected to the terminal block 21 and the fire spreads. However, in the outdoor unit of the air conditioner according to the embodiment of the present invention, the flame spread through the lead wire 14 spreads to the vicinity of the opening shielding wall 19h and the horizontal wall 19g. The partial shielding wall 19h and the horizontal wall 19g prevent the flame from spreading upward. For this reason, it is possible to prevent the flame from burning to the control board 22.

  As described above, the vertical wall 19f secures a clearance necessary for assembly above and on the rear surface side of the terminal block installation surface 20d of the terminal block mounting plate 20. However, a height difference is generated between the control board shielding wall 19e and the upper end of the terminal block installation surface 20d of the terminal block mounting plate 20, and this height difference (stepped portion) overlaps the lower side of the vertical wall 19f. As a result, the flame spread in the horizontal direction can be prevented by the vertical wall 19f.

  Further, even if a flame may enter from the circular window 30 formed on the terminal block mounting plate 20 in order to confirm the blinking of the LED on the control board 22 side, the rear surface side of the terminal block mounting plate is more than the window 30. Since the control board shielding wall 19e of the fire shielding cover 19 is disposed at the high position, it is possible to prevent the control board 22 from spreading to the control board 22 by the control board shielding wall 19e.

  Thus, according to the outdoor unit of the air conditioner of the embodiment of the present invention, the flame to be spread to the control board 22 via the lead wire 14 connected to the terminal block 21 of the terminal block mounting plate 20 is This can be prevented by the opening shielding wall 19h, the horizontal wall 19g, the vertical wall 19f, and the control board shielding wall 19e of the fire shielding cover 19. For this reason, the control board 22 fixed to the control board support 15 can be protected from a fire due to an external fire or a flame intentionally attached, and it is proved that the cause of the fire is not a fire from the inside of the air conditioner. can do.

  1 Fan guard, 2 Bottom plate base, 3 Top plate, 4 Front plate, 4a, 4b Hole, 5 Service panel, 6 Valve cover, 7 Fan support, 8 Heat exchanger, 9 Side plate, 9a Through hole, 9b Notch, 10 Electrical component storage box, 11 Ice pillar guard, 12 Fan, 13 Bottom plate, 14 Lead wire, 15 Control board support, 16 Control board support cover, 17 Heat sink, 18 Heat sink support, 19 Fire shielding cover, 19a, 19b, 19c Hole, 19d recess, 19e control board shielding wall, 19f vertical wall, 19g horizontal wall, 19h opening shielding wall, 20 terminal block mounting plate, 20a, 20b mounting portion, 20c opening, 20d terminal block installation surface, 20e, 20f side wall, 21 terminal block, 22 control board, 23 heat sink holder, 24 partition plate, 25 piping, 26 compressors, 27 valves, 28 square holes, 30 windows.

Claims (4)

An outdoor unit body having a through hole on the side surface;
A control board support for holding the control board;
A terminal block to which lead wires from the control board are connected;
A terminal block mounting plate having an opening for passing the lead wire, arranged facing the through hole of the outdoor unit body, and mounted on the control board support;
A metal fire shielding cover disposed between the control board and the terminal block mounting plate,
The fire shielding cover is
An opening shielding wall that covers the opening of the terminal block mounting plate so that the lead wire can pass through;
A control board shielding wall that covers the terminal board mounting plate side of the control board from below ,
The opening shielding wall protrudes from the terminal block installation surface on which the terminal block of the terminal block mounting plate is installed toward the outside of the outdoor unit main body through the opening, and is a front end of a horizontal wall. The outdoor unit of the air conditioner characterized by being provided in . It said opening shielding wall, outdoor unit of an air conditioner according to claim 1, characterized by being formed by bending over the tip of the horizontal wall. The outdoor unit of an air conditioner according to claim 1 or 2 , wherein an upper portion of the opening shielding wall is formed on a slope inclined at a predetermined angle toward the opening. The vertical wall connected to the horizontal wall from the control board shielding wall provided, according to claim 1, characterized by being configured such that the said vertical wall and said terminal block installation surface of the upper portion overlaps Air conditioner outdoor unit.

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