JP3071080B2 - Wall-mounted air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having a refrigerant heat exchanger and a hot water heat exchanger, and more particularly to a wall-mounted air conditioner which is installed on a wall in a room.

[0002]

2. Description of the Related Art As an air conditioner for performing a cooling operation and a heating operation, a heat pump type air conditioner which performs both cooling and heating using one indoor heat exchanger and one refrigerant circuit is known. In the air conditioner, a single control board is sufficient for controlling the operation of the air conditioner, and the electrical box is arranged on the fan motor in the depth direction.

On the other hand, since a heat pump type air conditioner does not have a sufficient heating effect at the time of a heating operation, an air conditioner having a hot water circuit separately from a cooling circuit is known (Japanese Patent Publication No. Hei 5 (1994)).
-29829).

[0004] This type of air conditioner includes a refrigerant heat exchanger and a hot water heat exchanger in a case. During cooling, the refrigerant is supplied to the refrigerant heat exchanger to perform a cooling operation, a heating operation and a dehumidification operation. During operation (so-called dry operation), operation is performed by supplying hot water to the hot water heat exchanger.

[0005]

However, in such an air conditioner, a refrigerant heat exchanger and a hot water heat exchanger are housed in its case, and it is necessary to control the refrigerant circuit and the hot water circuit respectively during operation. Therefore, the control becomes complicated as compared with the heat pump type air conditioner. for that reason,
The required area of the control board increases, and the electrical box for housing the control board also increases in size. In particular, recent demands for fine control require a control board having a large area.

For this reason, in the case where the electric component boxes are stacked in the depth direction of the motor as in the related art, there is a problem that the space of the electric component box is limited and the control board having an increased area cannot be stored. .

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a wall-mounted air conditioner capable of increasing a storage area of a control board in an electrical box.

[0008]

In order to achieve the above object, the present invention provides a wall-mounted air conditioner including a heat exchanger, a fan and a motor for driving the fan in a case. Predefined width along the side wall of the case
Installation space for the electrical box that extends
Electrical box installed in this installation space
Form a terminal block support at the bottom of the
Attach the terminal block and open the terminal block
It is characterized by being exposed to the mouth .

[0009]

According to the wall-mounted air conditioner of the present invention, since the installation space for the electric box containing the control board is provided between the side of the motor and the side wall of the case, the control housed in the electric box is provided. The substrate can have a large area in the depth direction of the case.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a wall-mounted air conditioner 3 according to an embodiment of the present invention is an air conditioner for ordinary households capable of cooling and heating, and is an indoor unit connected to an outdoor unit. , So that it can be mounted on indoor walls.

As shown in FIG. 1, the air conditioner 3 mainly includes a refrigerant heat exchanger 5 into which a refrigerant is introduced, a hot water heat exchanger 6 into which hot water is introduced, and a blower 7 in a case 4. It is stored.

The case 4 comprises a frame 10 and a grill 11, and a suction port is formed in the front of the grill 11. An outlet 17 is formed below the grill 11, and the outlet 17 is provided with guide vanes 19 for guiding the direction in which air is blown.

The frame 10 includes a top plate 23 located on the upper side, a bottom 25 located on the lower side, and a back plate 27 located on the wall side between the top plate 23 and the bottom 25. These are integrally molded with a synthetic resin.

The top plate 23 is provided at the upper end 5 of the refrigerant heat exchanger 5.
A hollow 29 is formed in a portion where a and the upper end portion 6a of the hot water heat exchanger 6 are in contact with each other, and heat insulation inside and outside the case 4 is achieved.

The refrigerant heat exchanger 5 is an external unit 3 of the air conditioner.
1 (see FIG. 5), the refrigerant is introduced via a refrigerant circuit, and the hot water heat exchanger 6
Similarly, it is connected to the external unit 31 and hot water is introduced through a hot water circuit.

The blower 7 is a centrifugal blower.
The cross flow fan (fan) 20 is rotated by the fan 8 and a wind guide plate 22 for guiding the wind blown by the cross flow fan 20.
The air guide plate 22 is formed integrally with the back plate 27.

As shown in FIG. 2, the motor 18 is provided in the case 4 at one end in the longitudinal direction, and between the end wall 4a of the case and the motor 18 is provided.
A storage space 32 for the electrical box is formed.

The storage space 32 is provided on the side of the motor 18 so as to cross the depth direction inside the case 4. The electrical box 101 is stored in the space 32.

The electrical component box 101 is formed in a substantially cylindrical shape, and contains therein two control boards 102a and 102b. As shown in FIG. 3, each of the control boards 102a and 102b is a side wall 1 of the electrical box 101.
04a, 104b, a pair of guide grooves 103a,
Guided by 103b, insertion and withdrawal are possible from the grill 11 side.

One control board 102a has a side wall 104a.
Of the other control board 102
b has a width that covers the entire side wall 104b, and the area of the control board as a whole is twice as large as that of the related art.

As shown in FIGS. 3 and 4, on the grill 11 side, a switch box support 106 is attached to the opening 105 of the electrical box 101 at a substantially central portion thereof, and the switch box support 106 is bridged as a beam of the opening 105. Thus, the opening 105 of the electrical component box 101 is reinforced. Engagement claws 107a, 107b are formed on the switch box support 106, and these engagement claws 107a, 107b
It engages with engaging pieces 108a and 108b formed on the side walls 104a and 104b of the electrical box.
A switch box (not shown) is mounted on the surface of the switch box support 106.

A holding piece 109 for holding the control board 102a housed in the opening 105 is provided on the side wall 104a where one control board 102a is housed. The holding piece 109 has elasticity, and the control board 102
When a is inserted, it is pressed down with a finger. Similarly, a holding piece 110 is also provided on the other side wall 104b. When the control board 102b is inserted, the holding piece 110 is pressed down with a finger, and when the finger is released, the control board 102b returns by elastic force.
Is pressed against the end. Thereby, the control board 102
b is prevented from coming off.

The holding pieces 109 and 110 are formed integrally with the electrical box 101 by molding.

In the electrical box 101, a terminal block support 115 on which a terminal block 113 (see FIG. 2) is mounted is formed on one side thereof. This terminal block support 115
Is extended into a space 116 formed obliquely below the case 4 so that the terminal can be connected diagonally from below at the time of installation or maintenance work, etc., thereby facilitating the work.

In FIG. 2, reference numeral 117 denotes a wired remote controller, and reference numeral 118 denotes a power cord.

Here, the refrigerant circuit and the hot water circuit will be described.

FIG. 3 is a circuit diagram of the refrigeration cycle.

In this figure, the air conditioner 3 houses an indoor unit 37 comprising a refrigerant heat exchanger 5, a hot water heat exchanger 6, and a flow rate variable valve 61. The refrigerant heat exchanger 5 incorporates a refrigerant pipe 39 through which a refrigerant (Freon) flows, the hot water heat exchanger 6 incorporates a hot water pipe 41 through which hot water flows, and the refrigerant heat exchanger 5 has a hot water heat It is arranged upstream of the exchanger 5 in the ventilation path.

When the refrigerant is circulating in the refrigerant pipe 39, the pressure is reduced by the electric expansion valve 43, so that the refrigerant evaporates in the refrigerant heat exchanger 5 and cools the air. The water in the part is condensed and drained), and the conditioned room is cooled. When the hot water is circulating in the hot water pipe 41, the air is heated by the hot water heat exchanger 6, so that the conditioned room is heated.

When circulating the refrigerant through the refrigerant heat exchanger 5 and simultaneously circulating the hot water through the hot water heat exchanger, the air once cooled will be heated again, so that the cooling capacity and the heating capacity are adjusted. The temperature of the air after passing through the indoor heat exchanger 3 can be controlled. The air at this time is dehumidified (removed moisture) according to the cooling capacity during cooling.
Is done.

The outdoor unit 2 houses an outdoor unit 31 including a refrigerant compressor 45, an outdoor heat exchanger 47, an accumulator 49, and the like. These are connected by a refrigerant pipe to a refrigerant heat exchanger 5, an electric expansion valve. 43 and the like to form a refrigeration cycle (the refrigerant circulates in the direction of the solid arrow).

The outdoor unit 2 further contains a heat source unit 32 including a heater 53 (for example, a burner), a heat exchanger 55, a pump 57, a pusher tank 59, and the like. The hot water pipe 41 is connected in a ring shape to form a hot water circulation circuit.

According to this, the amount of heat radiated in the indoor heat exchanger 3 can be controlled by changing the amount of heating in the heater 53 and the amount of hot water circulation by the variable flow rate valve 61. Reference numeral 63 denotes a reserve tank which stores excess hot water in the hot water circulation circuit, and the overflow from the tank 63 is drained as drain. Reference numeral 65 denotes a pressurized water injection valve, and 67 denotes a pressurized water injection device for injecting hot water (water) into the hot water circulation circuit. Reference numerals 69 and 71 are piping between units for refrigerant, and 73 and 75 are piping between units for hot water, and connect the indoor unit 37 and the outdoor unit 2.

Next, the operation of this embodiment will be described.

As shown in FIG. 1, in the air conditioner 3, the grill 11 is attached to a wall facing the room.

In the air conditioner 3, an installation space 32 for the electrical box 101 is provided between the side of the motor 18 and the side wall 4a of the case 4 so as to cross the inside of the case in the depth direction of the case 4. Therefore, the storage space 32 of the electrical component box 101 can be sufficiently secured.

Therefore, the refrigerant heat exchanger 5 and the hot water heat exchanger 6
An air conditioner having a complicated configuration in which each has a refrigerant circuit or a hot water circuit, and the control is complicated, so that the air conditioner can be sufficiently housed in the electrical box even if the control board area is large. At the same time, it can respond to fine-grained control.

Particularly, among the components of the air conditioner, since the size of the motor 18 is relatively easy to reduce, the space for the electrical box 32 is provided on the side of the motor 18 without increasing the size of the entire apparatus. Can be secured. As described above, the space 32 in which the electrical box 101 is installed is provided between the side portion of the motor 18 and the side wall 4a of the case 4 in the depth direction inside the case 4, so that the control board 102
a and 102b can take a large area in the depth direction of the case.

On the other hand, when the control board 102a is mounted on the electrical box, the holding plate 109 is pushed down to open the opening 10a.
The control board 102a is inserted along the guide groove 103a from the fifth side, and after insertion, the finger is released and the holding plate 109 is returned. The holding plate 109 presses and holds the control board 102a to prevent the control board 102 from coming off.

Similarly, the control board 102b
When attaching the opening 1, the holding plate 110 is pushed down to open the opening 1.
05, the control board 102b is inserted along the guide groove 103b, and after the insertion, the finger is released and the holding plate 110 is returned to its original position.
The control board 102b is pressed and held to prevent the control board from coming off.

Next, just by pushing the switch box support 106 into the opening 105, the engagement claws 107 are engaged and fixed to the engagement pieces of the side walls 104a and 104b of the opposing electrical box. The switch box support 106 not only supports the switch box, but also acts as a beam so that the electrical box is not deformed.

[0043]

According to the present invention, since the installation space for the control box housing the control board is provided between the side of the motor and the side wall of the case, the control board has a large area in the depth direction of the case. Can be taken.

Therefore, even in a wall-mounted air conditioner having a refrigerant heat exchanger and a hot water heat exchanger, fine control can be performed without increasing the size.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an air conditioner according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a main part of the embodiment.

FIG. 3 is a front view of the electrical box shown in FIG. 2;

FIG. 4 is a cross-sectional view of the electrical box shown in FIG.

FIG. 5 is a refrigerant circuit diagram of the air conditioner of the present embodiment.

[Explanation of symbols]

 3 Air Conditioner 4 Case 5 Refrigerant Heat Exchanger 18 Motor 20 Cross Flow Fan (Fan) 32 Installation Space for Electrical Box 101 Electrical Box 102a, 102b Control Board

Continued on the front page (56) References Japanese Utility Model 1-94834 (JP, U) Japanese Utility Model 1-125928 (JP, U) Japanese Utility Model 5-10916 (JP, U) Japanese Utility Model 6-159722 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00 401 F24F 13/32 F24F 11/02 103

Claims (1)

(57) [Claims] 1. A wall-mounted air conditioner including a heat exchanger, a fan, and a motor for driving a fan in a case, the air conditioner having a predetermined width along a side wall of the case on the motor side.
Installation space for the electrical box that extends completely inside the case
And a terminal at the bottom of the electrical box installed in this installation space.
A wall-mounted air conditioner , wherein a table support is formed , a terminal block is attached to the terminal block support, and the terminal block faces an opening formed in the case .