JP2013050276A - Air conditioner outdoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner outdoor unit having an electrical component unit, capable of being stably placed in a singly-erecting state by reinforcing the rigidity of a terminal block holder fixed with a terminal block.SOLUTION: In the terminal block holder 22 joined to the lower end edge of a chassis 20, an upper surface 22a is formed by being bent reward from a joining face, and the lower end of the upper surface 22a forms a placing part 22b which is bent frontward to form a slope. Furthermore, the terminal block holder has a left-side plate 22h and a right-side plate 22j which are formed so as to straddle both ends of the upper surface 22a and the placing part 22b, the front edge of the left-side plate 22h is bent sideways to form a left-side flange 22k, and the front edge of the right-side plate 22j is bent sideways to form a terminal block joining piece 22m.

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to a configuration of an electrical unit.

In multi-room type outdoor units connected with multiple indoor units, the number of electrical components mounted on the electrical board of the electrical unit has been increased to cope with the complicated control. As the size of the substrate increases, electrical boards are also mounted on the front and back sides of a substrate holder made of a sheet metal material.

A power supply line that supplies power to the electrical board, a power supply line that supplies power to each device from the electrical board, or a signal line to each device is relayed at the bottom of the board holder that mounts the electrical board that constitutes the electrical unit. Although the terminal block holder which fixed the terminal block to be provided is provided, with the enlargement of the electrical board and the board holder to which this is mounted, the terminal block holder is positioned further downward. For this reason, a positional shift occurs in the vertical direction between the lower end of the frame that holds the side substrate provided on the side surface of the electrical unit and the lower end of the terminal block holder.

In the conventional electrical unit, the lower end position of the frame holding the side board and the lower end position of the terminal block holder are substantially the same in the vertical direction, so the electrical unit was removed from the outdoor unit body during maintenance work, etc. At this time, the electrical unit could be placed on a work stand alone, for example, with the lower end of the frame and the lower end of the terminal block holder as legs. However, if a vertical misalignment occurs between the lower end position of the frame and the lower end position of the terminal block holder, the electrical unit cannot be placed on the work table.

If the electrical unit cannot be placed stand alone, it is necessary to be able to place the electrical unit in a standing state using a jig or support stand, which increases the manufacturing cost of the jig or support stand. The number of electrical units that can be placed in a limited space on the workbench is also limited.

In order to deal with the above-described problem, for example, the electrical unit 40 shown in FIG. 10 bends the lower part of the board holder 41 with the electrical board 44 and the electrical board 45 by the folding part 41c, and makes the terminal block 47 an inclined surface. The frame 42 supporting the side board 46 and the bottom surface of the board holder 41 are substantially equal to each other, and a side flange 41b as a leg is formed on the terminal board mounting part 41a. ing. As a result, when the plurality of electrical units 40 are placed on the work table as assembly parts on the assembly line of the outdoor unit, or when the electrical unit 40 is removed from the outdoor unit main body during maintenance work, the electrical unit 40 stands alone. It can be placed in a state (see Patent Document 1).

However, since the terminal block attaching portion 41a for fixing the terminal block 47 is formed by simply bending the lower part of the sheet metal constituting the substrate holder 41 forward, there is no reinforcing member for the bent portion. If it is intended to be placed on the work table with 40 standing up, there is a possibility that the terminal block mounting portion 41a or the bent portion is deformed by the load and the electrical unit 40 falls down.

Republished patent WO2007 / 108447 (4 pages, FIG. 5)

  In view of the above problems, the present invention provides a terminal block holder that can be used even when the electrical unit is placed on a work table or the like alone with the lower end of the frame of the side board and the lower end of the terminal block holder as legs. It is an object of the present invention to provide an outdoor unit of an air conditioner including an electrical unit that can be stably placed on a work table or the like without causing deformation or distortion due to load.

In order to solve the above-mentioned problems, the present invention divides the base into a heat exchange chamber and a machine chamber by a partition plate, and arranges a heat exchanger and a blower fan in the heat exchange chamber, and a compressor in the machine chamber In the outdoor unit of the air conditioner, in which an electrical unit having an electrical board is disposed above the compressor,
The electrical unit has a chassis on which the electrical board is mounted, a terminal block holder provided at the lower end of the chassis, and a side plate on which a side board is mounted, and the terminal block holder is located behind the chassis. An inclined upper surface portion, a mounting portion formed by bending the lower end of the upper surface portion forward to form an inclined surface, a horizontal portion extending horizontally from the mounting portion, and inclined from the horizontal portion It is the structure comprised by the extended part extended and the right side board and left side board which connect the both sides of the said upper surface part and the said mounting part.

Further, the right side plate and the left side plate form a left side flange and a terminal block joint piece, each of which has a front edge bent sideways, and the left side flange and the terminal block joint piece correspond to the upper surface portion and the front side. It is the structure formed so that it may become a surface parallel to the said chassis in the range of the up-down direction containing the bending part of a description part.

  According to the present invention, the terminal block holder is provided with the right side plate and the left side plate so as to connect the upper surface portion and both sides of the mounting portion, whereby the strength of the bent portion of the upper surface portion and the mounting portion is reinforced, Even if the electrical unit is placed standing alone, it is possible to prevent the occurrence of problems such as deformation of the terminal block holder.

  Further, the left flange and the terminal block joining piece are formed so as to be parallel to the chassis in the vertical direction including the upper surface portion and the bent portion of the mounting portion, so that the upper surface portion and the mounting portion are mounted. The bent portion of the mounting portion is further reinforced.

It is an external appearance perspective view which shows the outdoor unit of the air conditioner by this invention. It is a disassembled perspective view of the outdoor unit of the air conditioner by this invention. It is a perspective view which shows the electrical equipment unit with which the outdoor unit of the air conditioner by this invention was equipped. It is a disassembled perspective view of the main board part with which the electrical equipment unit was equipped. It is a perspective view which shows the terminal block holder provided in the electrical equipment unit. It is a perspective view which shows attachment of a terminal block holder. It is a perspective view which shows the state in which the electrical equipment unit stood alone. It is explanatory drawing which shows the difference with the conventional bending part. It is principal part sectional drawing of an electrical equipment unit. It is an external appearance perspective view which shows the electrical equipment unit provided in the outdoor unit of the conventional air conditioner.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail as examples based on the attached drawings.

  As shown in the external perspective view of FIG. 1, an outdoor unit of an air conditioner according to the present invention is provided with a base 1 having a pair of legs 1a on the lower surface and a front side of the base 1, and a fan guard. A front panel 2 provided with an upper air outlet 2a provided with 3a and a lower air outlet 2b provided with a fan guard 3b, and a right side panel as a side panel erected on the machine room 11 side to be described later in the base 1 5 and a left side panel (not shown) as a side panel erected on the heat exchange chamber 12 side, which will be described later, of the base 1, and the front panel 2, the right side panel 5, and the left side panel are attached to and reinforced. The main body is composed of a top plate 4 on which a bead 4a is formed and a service panel 6 which is located on the right side of the front panel 2 and which is provided with a handle 6a and is detachably mounted. In Part pipe cover 7, below the right panel 5 side pipe cover 8 are respectively detachably attached.

  Next, the internal configuration of the main body will be described. As shown in the exploded perspective view of FIG. 2, the base 1 made of sheet metal is divided into left and right by a partition plate 10 extending in the front-rear direction, a machine room 11 is provided on one side, and a heat exchange chamber 12 is provided on the other side. Are formed. A compressor 13 for compressing the refrigerant and an operation valve unit 18 connected to the piping are disposed in front of the machine chamber 11, and an accumulator (not shown) connected to the compressor 13 is disposed in the rear. Yes. An electrical unit 19 including a power supply board, a plurality of control boards, and the like is disposed above the machine room 11.

  The back side of the heat exchange chamber 12 partitioned by the partition plate 10 is composed of a large number of parallel fins and heat transfer tubes arranged so as to be orthogonal to the fins, and is bent in an L shape. An outdoor heat exchanger 14 is provided. In addition, a blower fan mounting base 15 is erected on the front surface of the outdoor heat exchanger 14, and the blower fan mounting base 15 includes an upper fan motor (not shown) and an upper part pivotally supported by the upper fan motor. A propeller fan 16, a lower fan motor (not shown), and a lower propeller fan 17 supported by the lower fan motor are supported.

  A front panel 2 in which a circular upper air outlet 2a and a lower air outlet 2b are formed is mounted on the front surface of the heat exchange chamber 12, and upper propeller fans 16 are provided on the back surfaces of the upper air outlet 2a and the lower air outlet 2b. An annular fan ring (not shown) that covers the lower propeller fan 17 is formed.

  When the upper propeller fan 16 and the lower propeller fan 17 are driven by the upper fan motor and the lower fan motor, outdoor air is sucked from the back of the main body and passes through the outdoor heat exchanger 14 to exchange the outdoor heat. Heat exchange with the refrigerant flowing in the vessel 14 is performed. The heat-exchanged air is discharged to the outside from the upper air outlet 2a and the lower air outlet 2b, and the refrigerant that has passed through the heat transfer pipe of the heat exchanger 14 and exchanged heat with the air flow is connected to the indoor unit (not shown) via the pipe. It circulates between and indoor air conditioning.

  Next, the electrical unit 19 will be described. As shown in FIG. 3, a side plate 25 is screwed onto the partition plate 10 that partitions the machine room 11 and the heat exchange chamber 12, and a cross section formed in a vertically long shape at the front edge of the side plate 25. A U-shaped chassis holder 26 is attached.

The electrical unit 19 has a locking claw 20d formed on the chassis 20 (described later) locked on the electrical unit holder 26 and is supported on the front side, one end of which is fixed to the side plate 25 and the other end of the chassis 20. The rear surface side is supported by a stay 34 having a U-shaped cross section fixed to the back surface.
A terminal block holder 22 is joined to the lower end of the chassis 20, and external wiring 35 (described later) connected to the compressor 13, the upper fan motor, the lower fan motor, and the like is connected to the terminal block holder 22. The terminal block 27 is fixed. The stay 34 described above also has a handle function for carrying the electrical unit 19 when the electrical unit 19 is removed from the partition plate 10.

  Next, the main board part 19a which comprises an electrical equipment unit is demonstrated. As shown in the exploded perspective view of FIG. 4, the chassis 20 includes a main plate portion 20a on which the first main substrate 23 is mounted on the front side and the second main substrate 24 is mounted on the rear surface side via spacers, and the main plate portion 20a. The side plate portion 20b is bent forward toward the left side, and the front edge of the side plate portion 20b is further bent sideways to form a left flange 20c. Further, on the right side of the main plate portion 20a, a right flange 20e formed in an L shape toward the front is provided.

  A locking claw 20d is provided on the upper and lower sides of the left flange 20c so as to project sideways, and a screw hole is formed in the central portion. The chassis 20 has the upper and lower locking claw 20d attached to the chassis holder 26. By engaging with the slits drilled up and down, it is connected to the side plate 25 fixed to the partition plate 10 via the chassis holder 26 described above.

  The chassis cover 21 includes a front plate 21a that covers the front surface of the first main board 23, and a side plate 21b that is formed by bending the right side of the front plate 21a rearward. A screw is inserted into the front plate 21a. A projecting piece 21d having a hole 21e is formed, and the rear edge of the side plate 21b is bent sideways to form a right flange 21c having a locking hole and a screw insertion hole 21e (not shown). . While the locking claw of the chassis 20 is locked in a locking hole (not shown) of the chassis cover 21, a screw (not shown) is inserted into the screw insertion hole 21 e and screwed into the screw hole of the chassis 20. Is fixed to the chassis 20.

  As described above, the terminal block holder 22 made of a sheet metal material is joined to the lower end of the chassis 20 by spot welding. As shown in FIG. 5, the terminal block holder 22 includes a mounting portion 22b having an inclined surface for fixing the terminal block 27, and is formed by bending a plurality of portions as will be described later.

  Between the chassis 20 and the side plate 25, an inverter board (not shown), a frame formed in a frame shape supporting the inverter board, a heat sink joined to the back surface of the inverter board, and the like are provided. ing.

  As shown in the perspective view of FIG. 5, the terminal block holder 22 is bent so as to incline toward the rear from the lower end of the joining piece 22f and the joining piece 22f, and the wiring insertion hole 22g. An open upper surface portion 22a and a lower end of the upper surface portion 22a are bent forward, and a mounting portion 22b having an inclined surface is provided. A terminal block 27 is fixed to the mounting portion 22b. Yes. Further, the lower end of the mounting portion 22b is bent horizontally to form a horizontal portion 22c, and the horizontal portion 22c is further bent downward to form an extension portion 22d to which a wiring fastener (not shown) is attached. doing.

Moreover, between the upper surface part 22a and the mounting part 22b, the upper and lower ends are connected to the upper surface part 22a and the mounting part 22b by spot welding and a bent part so as to connect both sides of the upper surface part 22a and the mounting part 22b. A joined left side plate 22h and a right side plate 22j are provided. The upper surface portion 22a, the mounting portion 22b, the left side plate 22h, and the right side plate 22j form a recess 22e in which the terminal block 27 is accommodated in a box shape.

Further, the front edge of the left side plate 22h is bent sideways to form a left side flange 22k, and the front edge of the right side plate 22j is bent sideways to be formed on a main plate portion 20a of the chassis 20, which will be described later. A terminal block joining piece 22m whose upper end is joined to the chassis joining piece 20g is formed.

  Next, joining of the chassis 20 and the terminal block holder 22 will be described. As shown in FIG. 6, a flange 20 f is formed at the lower end edge on one side of the chassis 20 so as to be inclined rearward from the main plate portion 20 a and is in contact with the upper surface portion 22 a of the terminal block holder 22. Moreover, as will be described later, the joining piece 22f of the terminal block holder 22 is joined to the lower end of the main plate portion 20a by spot welding. Further, the terminal block joining piece 22m of the terminal block holder 20 is joined by spot welding to the chassis joining piece 20g formed by extending the front edge of the right flange 20e provided on the right side in the chassis 20 downward. It has become. In the present embodiment, the chassis 20 and the terminal block holder 22 are described as being joined by spot welding. However, the present invention is not limited to this, and the chassis 20 and the terminal block holder 22 are integrated. You may form in. Further, these shapes, bent portions or welding methods are not limited to the above-described contents, and various modifications are possible.

  Next, the state of the electrical unit 19 alone will be described. When the electrical unit 19 is placed on a work table or the like as an assembly part on the assembly line of the outdoor unit, or when it is removed from the outdoor unit main body in the maintenance operation of the outdoor unit, as shown in FIG. With the lower end flange 25a formed at the lower end of the side plate 25 on which the substrate is mounted and the extended portion 22d of the terminal block holder 22 as legs, it can be placed standing alone.

Next, the strength on the terminal block holder 22 side in the present application will be described. FIG. 8A shows an example in which the terminal block attaching portion 41a is formed by simply folding the lower portion of the chassis 41 forward by a bent portion 41c indicated by A portion, as described in the background art. (B) is explanatory drawing which shows joining of the chassis 20 and the terminal block holder 22 in this application.

In the present application, as shown in FIG. 8B, the joining piece 22f of the terminal block holder 22 is joined to the lower end of the main plate portion 20a by spot welding, and is bent so as to be inclined backward from the main plate portion 20a. Is in contact with the upper surface portion 22a. Further, the upper end edge of the terminal block joining piece 22m of the terminal block holder 20 is joined to the chassis joining piece 20g formed extending below the right flange 20e by spot welding.

As described above, the terminal block holder 22 has the joining piece 22f, the upper surface portion 22a, the mounting portion 22b which is bent from the lower end of the upper surface portion 22a and becomes an inclined surface, and the horizontal shape from the lower end of the mounting portion 22b. And a horizontal portion 22c bent to a lower portion and an extending portion 22d bent further downward from the horizontal portion 22c, and between the upper surface portion 22a and the mounting portion 22b, A left side plate 22h and a right side plate 22j having upper and lower ends joined by spot welding and a bent portion are provided so as to connect both sides of the mounting portion 22b. The front edge of the left side plate 22h is bent sideways to form a left side flange 22k, and the front edge of the right side plate 22j is bent sideways to form a terminal block joining piece 22m.

The left flange 22k formed at the front edge of the left plate 22h and the terminal block joining piece 22m formed at the front edge of the right plate 22j and joined to the chassis joining piece 20g of the main plate portion 20a are the chassis 20 and the terminal block holder. 22 is formed so as to be parallel to the main plate portion 20a on the side surface of the bent portion, so that the strength of the bent portion of the chassis 20 and the terminal block holder 22 surrounded by the B portion in FIG. It has become.

The chassis joining piece 20g and the terminal block joining piece 22m may be formed, for example, at a position where the main plate portion 20a is vertically extended downward, but as shown in FIG. By forming the chassis joining piece 20g at the front and joining the terminal block joining piece 22m to the chassis joining piece 20g, the area of the right side plate 22j and the left side plate 22h becomes larger, and the range of the range indicated by B section Strength has been increased.

The left side plate 22h and the right side plate 22j are connected to the left side flange 22k and the terminal block joining piece 22m.
The left side plate 22h and the right side plate 22j are joined so as to connect both sides of the bent upper surface portion 22a and the mounting portion 22b, thereby reinforcing the strength.

As described above, the left flange 22k and the terminal block joining piece 22m are formed on the side surfaces of the bent portions of the chassis 20 and the terminal block holder 22 so as to be parallel to the main plate portion 20a. A left side plate 22h and a right side plate 22j that connect both sides of the upper surface portion 22a and the mounting portion 22b are formed continuously with the terminal block joining piece 22m, and a bent portion indicated by A portion in FIG. Compared to the structure formed by simply bending, such as 41c, the structure indicated by B in FIG. 8B is improved in strength, and the extension unit 22d of the terminal block holder 22 is brought into contact with the electrical unit 19 to be in contact with it. Even if it is placed on a workbench, it can be placed stably without causing deformation or the like.

  Next, a cross-sectional view of the main parts of the chassis 20 and the terminal block holder 22 is shown in FIG. A terminal block holder 22 is joined to the main plate portion 20a, and the terminal block holder 22 is bent by a bent portion indicated by a D portion from an A portion to form a concave portion 22e, and is placed as an inclined surface. A terminal block 27 is fixed to the portion 22b. The wiring group 28a led out from the upper part of the terminal block 27 and connected to the second main board 24 through the wiring insertion hole 22g is led out without bending of the wire in the lead-out portion. As a result, it is possible to prevent problems such as the occurrence of disconnection by eliminating a sharp bend in the wiring.

DESCRIPTION OF SYMBOLS 1 Base 1a Leg 2 Front panel 2a Upper blower outlet 2b Lower blower outlet 3a, 3b Fan guard 4 Top plate 4a Bead 5 Right side panel 6 Service panel 6a Handle 7 Front piping cover 8 Side piping cover 10 Partition plate 11 Machine Chamber 12 Heat exchange chamber 13 Compressor 14 Outdoor heat exchanger 15 Blower fan mount 16 Upper propeller fan 17 Lower propeller fan 18 Operating valve unit 19 Electrical unit 20 Chassis 20a Main plate portion 20b Side plate portion 20c Left side flange 20d Locking claw 20e Right side Flange 20f Flange 20g Chassis joint piece 21 Chassis cover 21a Front plate 21b Side plate 21c Right side flange 21d Projection piece 21e Screw insertion hole 22 Terminal block holder 22a Upper surface portion 22b Mounting portion 22c Horizontal portion 22d Extension portion 22e Recess 22g Wiring insertion Hole 22h left side 22j right side plate 22k left flange 22m terminal block joining pieces 23 first main substrate 24 a second main substrate 25 side plate 25a lower flange 26 chassis holder 27 terminal block 34 stay 35 external wire 35a wire group

Claims (2)

The base is divided into a heat exchange chamber and a machine room by a partition plate, a heat exchanger and a blower fan are arranged in the heat exchange chamber, a compressor is arranged in the machine room, and above the compressor. In an outdoor unit of an air conditioner formed by arranging an electrical unit including an electrical board,
The electrical unit has a chassis on which the electrical board is mounted, a terminal block holder provided at the lower end of the chassis, and a side plate on which a side board is mounted, and the terminal block holder is located behind the chassis. An inclined upper surface portion, a mounting portion formed by bending the lower end of the upper surface portion forward to form an inclined surface, a horizontal portion extending horizontally from the mounting portion, and inclined from the horizontal portion An outdoor unit for an air conditioner comprising an extended portion that is extended, and a right side plate and a left side plate that connect the upper surface portion and both sides of the mounting portion. The right side plate and the left side plate form a right side flange and a terminal block joint piece, each of which has a front edge bent sideways. The outdoor unit for an air conditioner according to claim 1, wherein the outdoor unit of the air conditioner is formed so as to be in a plane parallel to the chassis in a vertical range including a bent portion.