JPH0650568A - Air conditioner - Google Patents

Abstract

PURPOSE:To install an outdoor unit on a surface of an outer wall of a house in close contact with a back surface of the unit without reducing an atmosphere suction amount by opening an atmosphere suction port at a side of the unit, opening an air discharge port at a front surface and closing the back surface. CONSTITUTION:An outdoor unit 2 is opened with an air discharge port 7 at its front plate 2a, opened with atmosphere suction ports 8a, 8b at a pair of left and right side plates 2b, 2c and formed therein with a vent passage 9 for communicating the ports 8a, 8b with the port 7. The unit 2 is substantially closed at entire back plate 2d and ceiling plate 2e, and so mounted at an upper end of the plate 2d with a pair of counterclockwise holding-down bolts 10a, 10b for wall-suspending as to be clamped from inside at a predetermined interval. Thus, a decrease in the atmosphere suction amount and an increase in power consumption of an outdoor fan motor can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split type air conditioner having an indoor unit and an outdoor unit, and more particularly to an air conditioner in which an outside air intake port is opened on a side surface of an outdoor unit and a rear surface is closed.

[0002]

2. Description of the Related Art Generally, an air conditioner of this type constitutes a closed refrigeration cycle in which an outdoor unit is connected to an indoor unit through a refrigerant pipe to circulate a refrigerant. It is formed in a tubular shape. For this reason,
When the outdoor unit is installed outdoors, the rear surface of this outdoor unit can be closely attached to the mounting surface such as the outdoor wall of the building to improve the storage and enhance the aesthetic appearance.
There is a request to save the installation space.

[0003]

However, in such a conventional air conditioner, the outside air inlet is opened on the back surface of the outdoor unit, so that when the back surface of the outdoor unit is closely attached to the building outdoor wall. Since the outside air inlet is closed by the outer wall, the amount of outside air sucked into the outdoor unit is remarkably reduced, the heat exchange capacity is lowered, and the load on the outdoor fan is increased, so that the power consumption is increased.

Therefore, the present invention has been made in view of such circumstances, and an object thereof is to install the back surface of the outdoor unit in close contact with a wall surface such as a building outdoor wall without reducing the intake amount of outside air. It is to provide an air conditioner that can.

Another object is to improve the heat exchange capacity or efficiency of the outdoor unit.

[0006]

The present invention is configured as follows in order to solve the above-mentioned problems.

The invention according to claim 1 of the present application (hereinafter, referred to as the first
Of the invention), which is an air conditioner that constitutes a closed refrigeration cycle in which an outdoor unit is connected to an indoor unit through a refrigerant pipe to circulate a refrigerant, the outdoor unit having an air outlet opening on a front surface portion. At the same time, an outdoor unit is formed in which the outside air suction ports are respectively opened in the pair of side surfaces and an air passage for communicating these openings is formed therein, a compressor arranged in the center of the outdoor unit, and the pair of outside air units. A pair of outdoor heat exchangers respectively accommodated inside the outdoor unit inside the suction port, and a pair of outdoor heat exchangers accommodated inside the outdoor unit inside the air outlet and suck outside air through the outside air inlet. At the same time, an outdoor fan, which is an axial fan that allows the suction air to pass through the outdoor heat exchanger and then discharges the suction air to the outside through the air discharge port, is provided.

In the invention according to claim 2 of the present application (hereinafter referred to as the second invention), each of the outdoor heat exchangers according to the first invention has a plurality of pipes for passing the refrigerant arranged in a line. ,
A plurality of fins are attached to the outer circumference of the pipe row so as to be orthogonal to each other, and these pipes are bent into a required shape in a plane direction including the central axis thereof. It is characterized in that it is eccentric inward from the central axis of the bending direction.

[0009]

[Action]

<First Invention> The outdoor unit has an outside air suction port opened on its side surface, an air discharge port opened on its front surface, and its back surface closed.

Therefore, even when the back surface of the outdoor unit is installed in close contact with the outer surface of the building outdoor wall, etc., the outside air is sucked from the outside air intake port on the side surface of the outdoor unit and discharged from the front air discharge port. It is possible to prevent a decrease in the suction amount and an increase in the power consumption of the outdoor fan motor. Further, since the back surface of the outdoor unit can be installed in close contact with the outer surface such as the outdoor wall of the building, it is possible to have a good external appearance, enhance aesthetics, and save the installation space.

Further, since the outdoor heat exchanger is installed inside the pair of left and right outdoor air intake ports, the ventilation efficiency in the indoor unit can be increased, the heat exchange capacity of the outdoor unit can be improved, and the power consumption can be improved. Can save

Further, since the relatively heavy compressor is installed on the central portion of the outdoor unit, it is extremely stable when carrying the outdoor unit or suspending the wall.

Furthermore, since the outdoor fan is composed of an axial flow fan, the propeller of the outdoor fan is made thin and has multiple blades.
The outdoor unit can be made thinner.

<Second Invention> Since the outdoor heat exchanger according to the first invention has its outer surface area increased by bending the pipe row, the heat exchange capacity can be increased accordingly. it can.

Further, since the center axis of the pipe is eccentric to the inner side of the fin in the bending direction, it is possible to prevent the adjacent fins from contacting each other inside the bent portion to prevent ventilation. It is possible to enhance the heat exchange capacity.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan sectional view of an embodiment of the first invention of the present application, and FIG. 2 is a partially cutaway half-cut front view of FIG. 1, in which an air conditioner is a refrigerant pipe not shown in the outdoor unit 1. A closed refrigeration cycle in which the refrigerant is circulated by being connected to the indoor unit via the.

The outdoor unit 1 has a bottomed rectangular tubular outdoor unit 2, for example, a vertical rotary type compressor 3, a pair of left and right arcuate outdoor heat exchangers 3a and 3b, an outdoor fan 4, and an accumulator 5. , Inverter 6, and other necessary equipment are built in.

The outdoor unit 2 has an air discharge port 7 opened in its front plate 2a, and outside air suction ports 8a, 8b opened in a pair of left and right side plates 2b, 2c, respectively. An air passage 9 is formed inside for communicating with the air outlet 7.

The outdoor unit 2 has a back plate 2d and a top plate 2e shown in FIG.
At the upper end of d, a pair of left and right installation bolts for hanging the wall 1
0a and 10b are attached so as to be tightened from the inside with a required space left and right.

In the outdoor unit 2, a compressor 3 is erected on a substantially central portion of a bottom plate 2f thereof, and the periphery thereof is partitioned by a semicircular central partition plate 11, and the upper end portion of the compressor 3 is divided into upper and lower partition plates 12. It is fixed. Upper and lower partition plate 1
An inverter 6 is fixed on the upper part 2. The inverter 6 is electrically connected to the compressor 3 and the fan motor 4a of the outdoor fan 4.

An outdoor fan 4 is disposed on the front surface of the bottom plate 2f in front of the central partition plate 11, and the outdoor fan 4 has a multi-blade thin propeller fan 4b on the rotation shaft of the fan motor 4a. It is installed and configured as an axial fan.

Further, a pair of left and right outdoor heat exchangers 3a, 3b having an arc shape with an overall convex shape are erected on the side surfaces of the bottom plate 2f inward of the pair of air suction ports 8a, 8b. The accumulator 5 is formed inside the bell mouth of the front plate 2a.

The pair of outdoor heat exchangers 3a and 3b are fin-tube type heat exchangers, and for example, a plurality of arcuate copper pipes 3a and 3b are arranged in parallel in a plurality of stages at a required interval in the vertical direction. And a plurality of vertically elongated thin plate-shaped fins 4a made of aluminum or the like on the outer periphery of these pipe rows.
, 4b are mounted so as to be orthogonal to each other in the axial direction at a required pitch.

Since the outdoor unit 1 is constructed in this way, when the outdoor unit 1 is operated, outside air is introduced from the pair of left and right outside air inlets 8a, 8b of the outdoor unit 2 to the ventilation passage 9 therein. Each is sucked in, and further, this ventilation path 9
The pair of left and right outdoor heat exchangers 3a and 3b are ventilated, and heat is exchanged at that time. The heat-exchanged air is further discharged from the air discharge port 7 on the front surface to the outside air.

Therefore, according to this embodiment, the outside air suction ports 8a and 8b are opened on both left and right side surfaces of the outdoor unit 2,
Since the back plate 2d is closed, the outdoor unit 1 can be installed by bringing the outer surface of the back plate 2d into close contact with the outer surface of the building outdoor wall or the like. For this reason, the installation space of the outdoor unit 1 can be saved, and at the same time, the storage can be improved and the appearance can be improved.

Further, since the outdoor unit 1 can be installed without closing the outside air inlets 8a and 8b, it is possible to prevent a decrease in the ventilation amount on the ventilation passage 9. For this purpose, the pair of outdoor heat exchangers 3a,
It is possible to prevent a decrease in heat exchange capacity in 3b, reduce the load on the outdoor fan 4, and save power consumption.

Further, a pair of left and right outdoor heat exchangers 3a,
Since 3b is arranged on the ventilation passage 9, the outdoor heat exchanger 3
The area of the outer surface of a and 3b can be expanded and heat exchange capacity can be improved.

Further, the left and right outdoor heat exchangers 3a, 3
Since b is arranged at two places on the left and right in the vicinity of the outside air suction ports 8a and 8b, it is possible to increase the heat exchange area and enhance the heat exchange capacity without reducing the ventilation amount.

Furthermore, since the compressor 3 having a relatively heavy weight is arranged substantially above the central portion of the outdoor unit 2, it is extremely stable when carrying the outdoor unit 2 or suspending the wall.

Further, since the lower end of the compressor 3 is fixed to the bottom plate 2f and the upper end is fixed to the upper and lower partition plates 12,
Rotational vibration of the compressor 3 can be reduced and noise can be reduced.

In the outdoor fan 4, the propeller 4b has a multi-blade thin structure, and the fan motor 4a is arranged substantially in the center of the outdoor unit 4. Therefore, the depth of the outdoor unit 2 is reduced to achieve a thin structure. be able to.

Further, by removing the front plate 2a, it is possible to tighten the installation bolts 10a and 10b for suspending the wall surface from the inside of the outdoor unit 2, and the outdoor unit 2 can be easily suspended. it can.

3 and 4 show the outdoor heat exchangers 3a and 3a.
b shows another embodiment of b, in which the outdoor heat exchanger 13 of this embodiment bends a plurality of pipes 13a through which the refrigerant passes in a substantially L-shape, and a plurality of pipes mounted on the outer periphery of these pipes 13a. It is characterized in that the width of the fin 13b in the width direction is wider than in the conventional example.

That is, in the outdoor heat exchanger 13, as shown in FIG. 5, a plurality of L-shaped pipes 13a through which the refrigerant passes are arranged in a line in a vertical direction at a required pitch PP in a vertical line. Both ends in the axial direction are connected to each other by U-shaped bend pipes to form one flexible pipe.

Further, a plurality of vertically elongated thin plate fins 13b, 13b, etc. made of, for example, aluminum, which are orthogonal to the pipes 13 are attached to the outer peripheries of the pipes 13 at a predetermined pitch in the axial direction.

The widthwise dimension WF of each fin 13b is, for example, 1.1 times the pitch PP of the pipes 13a in the direction in which they are arranged side by side, and is longer than the widthwise length of the conventional example in which the pipes 13a are arranged in one row. It is slightly widened.

By the way, in the conventional outdoor heat exchanger having one row of pipes, the fin width WFO is, for example, the pipe pitch PP.
The size of the conventional outdoor heat exchanger having two pipe rows is 3 ^1/2/2 times as large as that of the conventional example.
It is formed twice as large as

As shown in FIG. 4, in the outdoor heat exchanger 13 of this embodiment, the central axis Op of the pipe 13a is slightly decentered in the L-shaped bending direction from the central axis Of of each fin 13p. The dimensions of each part in FIG.
The formula is set to hold.

[0040]

[Equation 1]

Therefore, as shown in FIG. 4, inside the L-shaped bent portion B of the outdoor heat exchanger 13, it is possible to prevent the adjacent fins 13b, 13b from contacting each other. Air can also be ventilated inside the bent portion B to exchange heat.

Therefore, when the outdoor heat exchanger 13 thus constructed is operated for heating, a low-temperature liquid refrigerant flows in the pipe 13a and evaporates, and at the time of evaporation, it absorbs heat from the outside air.

At this time, if the moisture in the outside air is condensed on the outer surfaces of the fins 13b, and is further frozen and frosted, the heat exchange capacity is lowered.

However, the outdoor heat exchanger 13 of this embodiment
Expands the width dimension WF of the fin 13b to be larger than the fin width WFO dimension of the single-row pipe type outdoor heat exchanger of the related art to increase the outer surface area.
The heat transfer ability of 3b with the outside air is improved, and the fin temperature is increased. For this reason, dew condensation and freezing of the fin 13b are reduced,
The need for defrost is also reduced.

Further, even if frost is formed on the outer surface of the fin 13b, the area of the outer surface of the fin 13b is larger than that of the conventional example, so that the frost is thin. For this reason, it is possible to suppress a reduction in the amount of ventilation that ventilates the outdoor heat exchanger 13, so that the heat exchange capacity is not significantly reduced and the heating operation can be performed for a long time. That is, it is possible to reduce the frequency of the defrosting operation and improve the heating capacity or efficiency.

Such an effect can be obtained also in the conventional two-row pipe type heat exchanger in which the width of the fins is widened. In this conventional example, the two rows of pipes are heated during the defrosting operation to melt the frost. Since it is necessary, the amount of heat required for defrosting increases, and the defrosting operation time becomes longer. Since the heating operation is interrupted during this defrosting operation, the heating capacity or efficiency is reduced.

On the other hand, the outdoor heat exchanger 1 of this embodiment
In No. 3, since there is one pipe row, there is no drawback of the conventional example of such a two-row pipe type.

That is, the outdoor heat exchanger 13 can improve the heating capacity or efficiency.

[0049]

As described above, the first invention of the present application is
Since the outside air suction port is opened on the side surface of the outdoor unit and the back surface is closed, the outdoor unit can be installed by bringing this back surface into close contact with the outer surface such as the building outdoor wall. Therefore, it is possible to save the installation space of the outdoor unit, improve the fitting of the outdoor unit, and enhance the appearance.

Further, since the outdoor heat exchangers are respectively arranged on the ventilation passages in the outdoor unit, the ventilation efficiency of the ventilation passages can be increased to enhance the heat exchange capacity and the load on the outdoor fan can be reduced. The power consumption can be saved.

Further, since the relatively heavy compressor is arranged in the central portion of the outdoor unit, it is possible to enhance the stability when carrying the outdoor unit or suspending the wall.

On the other hand, according to the second aspect of the present invention, since the outdoor heat exchanger is bent into a desired shape such as an L shape, the outer surface area of the outdoor heat exchanger is increased to enhance the heat exchange capacity. You can

Moreover, since the central axis of each pipe is eccentric inward in the bending direction with respect to the central axis of the fin, it is possible to prevent ventilation between adjacent fins contacting each other inside the bent portion. It is possible to prevent the heat exchange capacity from being deteriorated.

[Brief description of drawings]

FIG. 1 is a partial plan sectional view of an outdoor unit according to a first invention of the present application.

FIG. 2 is a front view of the partially cut and half-cut sheet of FIG.

FIG. 3 is a partially omitted perspective view of an outdoor heat exchanger according to a second invention of the present application.

FIG. 4 is a plan view of the outdoor fan shown in FIG. 1 and the outdoor heat exchanger shown in FIG.

5 is a front view of a main part of the outdoor heat exchanger shown in FIGS. 3 and 4. FIG.

[Explanation of symbols]

 1 outdoor unit 2 outdoor unit 2a front plates 2b, 2c left and right side plates 2d rear plate 3 compressors 3a, 3b left and right pair of outdoor heat exchangers 4 outdoor fans 5 accumulators 6 inverters 7 air outlets 8a, 8b outside air inlets 9 Ventilation path 11 Central partition plate 13 Outdoor heat exchanger 13a Pipe 13b Fin

Claims (2)

[Claims] 1. An air conditioner that constitutes a closed refrigeration cycle in which an outdoor unit is connected to an indoor unit via a refrigerant pipe to circulate a refrigerant, wherein the outdoor unit has an air discharge port opened at a front surface thereof. An outdoor unit in which an outside air suction port is opened in each of the pair of side surfaces, and an air passage communicating with these openings is formed therein; a compressor disposed in the center of the outdoor unit; and the pair of outside air suction units. A pair of outdoor heat exchangers respectively housed inside the outdoor unit inside the mouth, and housed inside the outdoor unit inside the air discharge port and sucking outside air from the outside air inlet An outdoor fan comprising an axial fan that allows the suction air to pass through the outdoor heat exchanger and then discharges the air from the air discharge port to the outside. 2. In each outdoor heat exchanger, a plurality of pipes for passing a refrigerant are arranged in a line, and a plurality of fins are attached to the outer periphery of the pipe line so as to intersect at right angles, and these pipes are arranged at the center thereof. Bend to the required shape in the plane direction including the axis,
The air conditioner according to claim 1, wherein the central axis of each of these pipes is eccentric inward in the bending direction with respect to the central axis of the fin.