JPH0222607Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an air conditioner comprising a refrigeration cycle, particularly an outdoor unit.

[Prior art]

The blower structure of an outdoor unit of an air conditioner, which is composed of a compressor, an air heat exchanger, a blower, a control device, etc., is required to have low noise depending on the location where it is installed. In order to meet this demand, improvements have been made to the blades of the blower and the blower casing, and recently, a bell mouth portion has been provided in the vicinity of the blade of the blower casing. For this reason, resins such as moldable plastics have come to be widely used as materials, but since the blower itself becomes part of the rigid body that makes up the main body of the air conditioner, it is particularly weak in terms of strength, which poses a problem. Ta.

[Summary of the idea]

This idea was devised in view of the above circumstances.
In order to increase the strength of the resin blower casing installed on the side plates/pillars and exterior panels of the L-shaped air heat exchanger, the blower casing is installed in the space between the plate fins of the L-shaped air heat exchanger and the blower casing. The rigidity of the blower casing is increased by providing a plurality of recesses in a part of the blower casing so as to make the plate fins of the L-shaped air heat exchanger come into contact with the plate fins.

[Example of idea]

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings.

1 to 4 are a plan view, a front view, an exploded perspective view, and an exploded perspective view of an embodiment of the air conditioner according to this invention.
FIG.

In the figure, reference numeral 1 denotes an outdoor unit main body of an air conditioner, which is composed of a blower section 2 and a heat exchanger section 3. In the figure, starting from the heat exchanger part 3, numeral 4 is a frame made by bending a relatively thick steel plate back and forth and left and right to form a dish-like structure as a whole, which also serves as a drain plate. This is a floor fixing plate that is bent and extends across the front and back of the underframe 4 and is attached to the underframe 4 by welding, and has through holes 5a at both ends for fixing to the floor. Reference numerals 4a denote through holes drilled in the four corners of the underframe 4, into which columns, heat exchangers, side plates, and front panels, which will be described later, are attached. 4b is a compressor fixing bolt installed in the front right part of the underframe 4, and two compressors 6 are fixed onto this bolt 4b via a spring and vibration isolating rubber (not shown). .

Reference numeral 7 denotes an oil separator installed behind the compressor 6, which separates the refrigerant and oil discharged from the compressor 6. 8 covers the compressor 6 and the oil separator 7 with a soundproof cover formed by bending a relatively thin steel plate into an L shape. 8a is a notch through which a refrigerant pipe (not shown) is passed.

Reference numeral 9 denotes an accumulator provided at the rear of the soundproof cover 8, which serves to store refrigerant and return it to the compressor 6.

Reference numeral 10 denotes an L-shaped air-side heat exchanger composed of plate fins 10a and copper tubes, with side plates 10
b and 10c, and is fixed integrally with the underframe 4 and the blower cover. Also, both side plates 10b, 1
There is a height difference H between 0c and the plate fin 10a, and a blower, which will be described later, is fixed by these side plates 10b and 10c.

Reference numerals 11 and 12 indicate ball valves attached to the ends of the soundproof cover 8, which connect extended refrigerant pipes to be connected to an indoor unit (not shown), with the upper part for connecting the liquid pipe and the lower part for connecting the gas pipe. It is. 2
6 is a plate fin protection net.

Reference numeral 13 denotes an upper lid of the soundproof cover 8 made of a relatively thin steel plate, which not only provides soundproofing for the compressor 6 and oil separator 7, but also prevents rain from entering from outside. 1
3a is a notch formed in the front of the upper cover 13, which connects the compressors 6, 6 from the control box 14, which will be described later.
This is the part where the wiring goes through.

Reference numeral 14 denotes a control box which is formed by bending a relatively thin steel plate into a square shape on each of its four sides to form the mounting flange 14a, and has a box-like structure as a whole. Blower motor 1
Control parts such as contactors and relays for controlling the operation of the 6 are housed therein.

This control box 14 includes a column 22 and a side plate 24, which will be described later.
And the support 2 with the through hole and screws drilled in the front plate.
2. Fixed to the side plate.

Reference numeral 15 denotes an expansion valve disposed between the soundproof cover 8 and the air-side heat exchanger 10, and controls the flow rate of the refrigerant.

Next, the blower section 2 will be explained.

16 is a blower motor; 17 is a plastic blade rotationally driven by the blower motor;
8 is made by bending a relatively thick steel plate inward into a U-shape.
It is a motor mounting plate formed in a square shape, and the inner end 18a has a screw hole for fixing the motor leg, and the outer end 18a has a screw hole for fixing the motor leg.
8b is provided with two screw holes for fixing the mounting plate 18 itself to a fan cover, which will be described later. It is a fan cover made of resin such as plastic, and as is clear from the figure, the bell mouth part 19 is used to reduce the noise generated from the blower.
A is provided with a bending radius, and the outlet hole is configured such that the center position is offset.

In addition, a plurality of recesses 19 are provided on the left and rear parts.
b is provided to increase the strength of the resin molded product, and this recess 19b is provided with an L-shaped air heat exchanger 10.
provided opposite to the plate fin 10a portion of the plate fin 10a,
The depth of the recess 19b is the same as the height H between the side plates 10b and 10c and the plate fin 10a. Therefore, when the blower 2 is attached, the fan cover 19 is also supported by the plate fins 19a. The through hole in the recess 19b is a drainage hole.

Further, the configuration in which the center position of the outlet hole is offset is due to the fact that the blades 17 face the inside of the L-shaped air heat exchanger 10 in order to keep the product height of the air conditioner main body low.

20 is a fan card attached to the bell mouth 19a, and 21 is a hanging metal fitting formed by bending a relatively thick steel plate into a semicircular shape at the center, with through holes 21a bored at both ends. There is. Here, to explain how to assemble the blower, the four motor mounting plates 18 screwed to the legs of the motor 16 with bolts are aligned with the through holes (not shown) drilled in the fan cover 19, and then the fan cover Weight the hanging fitting 21 from above so as to interpose the
The hanging fitting 21, fan cover 19, and motor mounting plate 18 are fixed together with bolts. Therefore, the motor 16, the vanes 17, and the mounting feet 18
The load is applied to the contact area of the screw and the hanging fitting 21 and is reduced.

Reference numeral 22 denotes an L-shaped front support made of a relatively thin steel plate, and is fixed to the front left part of the underframe 4 with screws. 23 is L formed from a relatively thin steel plate.
It is a letter-shaped rear support and is attached and fixed to the rear left part of the underframe 4 with screws. Reference numeral 24 denotes a side plate made of a relatively thin steel plate, which is bent into a U-shape and attached to the right side of the underframe 4.

Reference numeral 25 is a front plate formed of a relatively thin steel plate, which is attached to the front of the underframe 4 with screws, and is connected to the ball valve 1.
Connection notches 25a are provided corresponding to 1 and 12.

The air conditioner configured as described above is assembled as follows.

First, place the front support 22 and the rear support 2 on the underframe 4.
3. After installing the side plate 24, air side heat exchanger 10, etc., install the two compressors 6, 6, oil separator 7, accumulator 9, air side heat exchanger 10, ball valves 11, 12 on the underframe 4. , expansion valve 15, and other refrigerant parts are attached, and the piping is connected to complete the assembly of the refrigerant piping system.

Next, the blades 17 are attached to the motor 16, and the motor mounting plate 18 is attached to the fan cover 19 together with the hanging fittings 21.
The blower part 2 is installed on the side plates 24 of the supports 22, 23 mounted on the underframe 4, and the blower part 2 is installed on the support posts 22, 2
3. The fan cover 19 is fixed to the pillars 22, 23 and the side plate 24 with screws, using the through holes in the side plate 24 and the through holes in the fan cover 19.

Next, the control box 14 housing the control parts on the soundproof cover 8 and the top lid 13 is aligned with the through holes made in the support column 22 and the side plate 24, and fixed with screws.

Thereafter, the front plate 25 is aligned with the through hole drilled in the control box 14, and the screws are tightened to complete the installation and assembly.

Next, the refrigerant control operation of the air conditioner will be explained.

High-temperature, high-pressure refrigerant (fluorocarbon) gas discharged from the compressor 6 goes to an oil separator 7, where it is separated into gas refrigerant and oil, and the oil is passed through a solenoid valve (not shown) to an accumulator 9. The gas refrigerant is returned to the air side heat exchanger 10 through a four-way switching valve (not shown).
There, it exchanges heat with air by the blower 2 and condenses to become a high-pressure liquid refrigerant. The condensed refrigerant is depressurized by the expansion valve 15 and goes to the ball valve 11, where it is connected to an indoor unit (not shown), is depressurized again by the throttling device, exchanges heat within the indoor unit, and goes to the ball valve 12. It circulates through the return four-way switching valve to the accumulator 9, and the compressor 6.
Return to In this way, a refrigeration cycle is constructed, and this operation is repeated thereafter.

[Effect of idea]

As explained above, the air conditioner according to this invention consists of pillars attached around the underframe, side plates,
The material of the fan cover of the blower, which is installed on the front panel and above the L-shaped air heat exchanger, is molded from resin such as plastic. A plurality of recesses are formed in the section, and these recesses are brought into contact with the plate fins of the opposing L-shaped air heat exchanger, thereby increasing the strength of the air conditioner body and reducing external loads. It can withstand it well. In addition, since it is made of resin, it is lightweight and inexpensive, and because it can be molded, it has great practical value, such as providing a bending radius around the entire circumference of the bell mouth of the air outlet to reduce the noise generated from the blower. It is large.

[Brief explanation of the drawing]

1 to 4 are views showing one embodiment of the air conditioner according to this invention, in which FIG. 1 is a plan view, FIG. 2 is a plan view and a front view, and FIGS.
FIG. 2 is an exploded perspective view of FIG. In the figure, 4 is an underframe, 6 is a compressor, 7 is an oil separator, 9 is an accumulator, 10 is an air side heat exchanger, 10d and 10e are through holes, 16 is a motor, and 17
18 is a blade, 18 is a motor mounting foot, 19 is a blower cover, 19b is a recess, 21 is a hanging metal fitting, 24 is a side plate, 25 is a side plate, and 26 is a fin protection net. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A compressor installed at the upper front part of the underframe, an accumulator installed at the rear, an L-shaped air heat exchanger consisting of plate fins installed at the upper left part and rear of the underframe, and an air outlet at the upper part. A blower casing provided with a motor, a blade, and a motor mounting foot attached to the blower casing, a control device disposed on the upper part of the compressor, and a side plate and a front plate constituting an exterior. An air conditioner characterized in that the material of the blower casing attached to the top of the shape air heat exchanger is made of moldable resin, and a plurality of depressions are provided in the blower casing portion facing the plate fins. .