JPH09310877A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which can perform both heating and cooling without increasing the installation space inside a room. SOLUTION: Air is heated by the heat exchangers 3a and 3b on the front side and rear side of a heat exchanger 3 and also radiant heat is radiated and indoor heating is performed by circulating hot water to a heat exchanger 3. Moreover, indoor air is cooled by the heat exchanger 3b on the rear side while being circulated compulsively in the air passage 3i of the heat exchanger 3, by circulating cold water to the heat exchanger 3 and operating a blower 3, thus the indoor cooling is performed. Accordingly, it becomes possible to perform both heating and cooling with roughly the same depth dimensions as a conventional panel type heater being so arranged as to emit radiant heat from its front at the time of heating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for heating and cooling a general house or office building.

[0002]

2. Description of the Related Art Conventionally, various heating devices have been used in general houses and office buildings. Among them, a panel type heating device using hot water as a heat source requires a small installation space in a room and is safe. Widely used because of its high price.
This panel-type heating device is equipped with a panel-shaped radiator that is installed along the wall surface of the room, etc. By circulating hot water generated by a boiler etc. to this radiator, the radiant heat emitted from the front surface of the radiator is radiated. It is designed for heating.

[0003]

However, since the conventional panel-type heating device is dedicated to heating, there is a problem in that a separate cooling device is required when cooling is desired and the equipment cost increases. There is also a fan coil unit that selectively circulates hot water and cold water to perform both heating and cooling, but in this case, the heat exchanger is housed in the casing and only forced convection is performed. As a result, heating and cooling are performed, and therefore, there is a problem that it is larger than the panel-type heating device and the installation space is significantly increased.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an air conditioner capable of performing both heating and cooling without increasing the installation space in the room. Especially.

[0005]

In order to achieve the above-mentioned object, the present invention has a front side heat exchange section having a heat transfer surface facing the indoor side and a rear side heat exchange section arranged on the back side of the front side heat exchange section. For heating the indoor air to the indoor heat exchanger, the indoor heat exchanger, the air flow passage provided in the back heat exchange portion, the blower for circulating the indoor air in the air flow passage, and the indoor heat exchanger Heat medium supply means for selectively supplying the high temperature side heat medium and the low temperature side heat medium for cooling the room air, and the outflow direction switching means for switching the air outflow direction of the air flow passage between the upper side and the front side. And the high temperature side heat medium is circulated at least to the front side heat exchange section, and the low temperature side heat medium is circulated only to the back side heat exchange section. As a result, by circulating the high-temperature side heat medium through the indoor heat exchanger, air is heated by at least the front heat exchange section of the indoor heat exchanger, and radiant heat is released from the front surface of the indoor heat exchanger. Then, the room is heated. In addition, by circulating the low-temperature side heat medium to the back side heat exchange section and operating the blower, the indoor air is forced to flow through the air flow passage while being cooled by the back side heat exchange section to cool the room. Be seen. Therefore, it is possible to perform both heating and cooling with a depth dimension almost equal to that of the conventional panel-type heating device that radiates heat from the front surface during heating. In addition, since the low temperature side heat medium does not flow through the front side heat exchange section during cooling, no condensation occurs on the front side of the indoor side heat exchanger, and during heating, not only the front side heat exchange section but also the back side It is also possible to heat the air by the side heat exchange section. Further, by directing the air outflow direction of the air flow path upward by the outflow direction switching means, convection of air is promoted during heating, and by directing the air outflow direction of the air flow path forward, the temperature distribution in the room during cooling Becomes uniform.

It is possible to arbitrarily switch between the front side and the front side.

[0007]

1 to 7 show an embodiment of the present invention. FIG. 1 is an overall perspective view of an indoor unit of an air conditioner, FIG. 2 is a plan sectional view of the indoor unit, and FIG. Is a partially enlarged perspective view of the heat exchanger, FIG. 4 is a schematic front view of the indoor unit, FIG. 5 is a schematic side view of the indoor unit, FIG. 6 is a schematic side view of a main part of the indoor unit, and FIG.
FIG. 3 is a circuit configuration diagram of an air conditioner.

The indoor unit 1 shown in FIG. 1 has a thin indoor unit body 2, a heat exchanger 3 for circulating hot or cold water as a heat medium, and a blower for circulating indoor air through the heat exchanger 3. 4 and a drain pan 5 that receives condensed water condensed in the heat exchanger 3, and the indoor unit 1 is installed along the wall surface of the room, as shown in FIG.

The indoor unit main body 2 is formed so as to cover the back surface, both side surfaces and the upper part of the indoor unit 1, and an air discharge port 2a facing obliquely upward is provided in the upper part. In addition, the air discharge port 2
An arcuate movable plate 2c that switches the direction of the blown air is movably provided inside a. By moving the movable plate 2c to the upper surface side of the indoor unit main body 2 as shown in FIG. Blows forward, and as shown in FIG. 6 (b), the movable plate 2
Air is blown out upward by arranging c on the back side of the indoor unit body 2.

The heat exchanger 3 comprises a front side heat exchange section 3a arranged on the front side of the indoor unit body 2 and a rear side heat exchange section 3b arranged on the rear side thereof. 3a
Has a heat transfer surface facing the indoor side. The front side heat exchange section 3a has a total of four heat medium distribution tubes 3c formed in a flat shape, and each heat medium distribution tube 3c has a large number of flow paths 3c arranged in the width direction as shown in FIG. ′, And each heat medium flow pipe 3c is vertically stacked in a state where the end faces in the wide direction are abutted to each other to form a single plate. Further, both ends of each heat medium flow pipe 3c are connected to a pair of headers 3d, and a heat medium inlet 3e is provided at an upper portion of one header 3c and a heat medium outlet 3f is provided at a lower portion thereof.
Are provided respectively. That is, as shown in FIG. 4, the heat medium flowing in from the heat medium inlet 3e flows in a meandering manner in the front side heat exchange section 3a from the upper heat medium flowing pipe 3c to the lower heat medium flowing pipe 3c in order. The heat medium outlet 3f is adapted to flow out. In addition, the back side heat exchange section 3
b is composed of a heat medium flow pipe 3g bent in a meandering shape and a large number of heat transfer fins 3h provided at intervals from each other, and an air flow passage 3i is provided in the rear heat exchange section 3b. .

The blower 4 is arranged above the heat exchanger 3,
It is composed of a cross-flow fan. That is, the blower 4 is composed of a total of two impellers 4a extending in a tubular shape in the width direction of the indoor unit 1 and a motor 4b arranged between the impellers 4a, and the rotation axis of the motor 4b is each impeller 4a. Are coaxially connected to. Further, the blower 4 is configured such that when a switch 4c provided on one side surface of the indoor unit body 2 is turned on, the motor 4b is rotated to operate, and the air on the indoor side is moved by the operation of the blower 4.
Is forcibly sucked in from the lower part of the room and is blown out from the air discharge port 2a of the indoor unit body 2 through the air flow passage 3i.

The drain pan 5 is arranged below the rear heat exchange section 3b, and a drain port 5a connected to a drain pipe (not shown) is provided on the bottom surface thereof.

The indoor unit 1 configured as described above is connected to the boiler 6 as the high temperature side heat medium supply means and the refrigerator 7 as the low temperature side heat medium supply means, and the high temperature side generated by the boiler 6 is connected. Hot water as a heat medium and cold water as a low temperature side heat medium generated in the refrigerator 7 are selectively circulated. That is, FIG. 6 shows an example including a plurality of indoor units 1, in which the boiler 6 and the refrigerator 7 are connected to each other on the outflow side and the inflow side via the three-way valve 8, and each indoor is constituted by a circuit of one system. Connected to machine 1. Further, the indoor units 1 are connected in parallel with each other, a flow rate control valve 9 is provided on each inflow side, and an opening / closing valve 10 is provided on a path bypassing the flow rate control valve 9. That is, the flow rate control valve 9 is a well-known temperature-sensitive type flow rate control valve used during heating, and although detailed description is omitted, the flow rate control valve 9 is configured so that the opening degree of the valve mechanically changes according to the ambient temperature. ing. Since the flow rate control valve 9 is for heating, the opening / closing valve 10 is opened during cooling so that the heat medium is circulated without passing through the flow rate control valve 9. Therefore, the on-off valve 10 during heating
Keep it closed. In the heat exchanger 3, the front side heat exchange section 3a is arranged on the heat medium inflow side and the back side heat exchange section 3b is arranged on the outflow side, and the heat exchange sections 3a and 3b are connected in series with each other. A path bypassing the front side heat exchange section 3a is provided between the inflow side of the front side heat exchange section 3a and the inflow side of the back side heat exchange section 3b by a three-way valve 11.

When performing the heating operation in the air conditioner of this embodiment, the three-way valve 11 is opened to the front side heat exchange section 3a so that the hot water generated in the boiler 6 is transferred to the front side heat exchange section 3a. And the back side heat exchange section 3b are sequentially circulated, and the air is heated by the heat exchange sections 3a and 3b. At that time, the radiant heat is released from the front surface of the heat exchanger 3, and the indoor air naturally convects in the air flow passage 3i in the indoor unit 1, so that the rear side and the rear side heat exchange section 3b of the front side heat exchange section 3a are formed.
Heating is also performed by exchanging heat with hot water via the heat transfer fins 3h. In this case, by directing the air blowing direction upward by the movable plate 2c of the indoor unit body 2, convection of indoor air is promoted and heating efficiency is improved.

When the cooling operation is performed, the cold water generated in the refrigerator 7 flows through the rear side heat exchange section 3b without passing through the front side heat exchange section 3a of the heat exchanger 3, and the rear side heat exchange is performed. Part 3
The air is cooled only by b. At that time, switch 4
By turning on c and operating the blower 4, the indoor air is forcibly sucked into the indoor unit 1 and the air flow passage 3i
After being cooled by the heat transfer fins 3h of the back side heat exchange portion 3b while flowing, the air is blown out from the air discharge port 2a.
In this case, the movable plate 2c of the indoor unit body 2 directs the air blowing direction to the front, so that the temperature distribution in the room becomes uniform and the cooling efficiency is improved. Further, the condensed water condensed on the back side heat exchange section 3b is received by the drain pan 5 and discharged to the outside through the drain port 5a.

As described above, according to the air conditioner of this embodiment, the heat exchanger 3 is composed of the front side heat exchange section 3a and the rear side heat exchange section 3b, and hot water or cold water is supplied to the heat exchanger 3. Since heating and cooling are performed by selectively distributing the air, the depth dimension of the indoor unit 1 can be made extremely small, and both heating and cooling can be performed without increasing the indoor installation space. it can. In this case, since hot water was made to flow to the front side heat exchange section 3a and the back side heat exchange section 3b, and cold water was made to flow only to the back side heat exchange section 3b, dew condensation on the front side of the heat exchanger 3 during cooling. When heating, air is heated not only by the front-side heat exchange section 3a but also by the back-side heat exchange section 3b, so that the heating capacity can be improved. In addition, since the movable plate 2c of the indoor unit body 2 can switch the air outflow direction of the air discharge port 2a between the upper side and the front side, heating efficiency can be improved by blowing air in any direction during heating or cooling. Also, the cooling efficiency can be improved.
In this case, the blower 3 may be appropriately operated not only during cooling but also during heating.

The air outflow direction switching means may be one whose one end is rotatably supported like the movable plate 2d shown in FIG. 8, and in this case, it is shown in FIG. 8 (a). Air is blown forward by rotating the movable plate 2d forward, and air is blown forward by rotating the movable plate 2d rearward as shown in FIG. 8 (b). Further, as shown in FIG. 9, the bypass including the flow control valve 9 is omitted, and the three-way valve 11 is replaced by the front side heat exchange section 3
The on-off valve 12 may be provided on the inflow side of a and the front-side heat exchange section 3a and the back-side heat exchange section 3b may be switched by opening and closing the on-off valve 12.

[0018]

As described above, according to the air conditioner of the first aspect of the present invention, heating and cooling can be performed with a depth dimension almost equal to that of the conventional panel type heating device which radiates heat from the front surface during heating. Since both can be performed, the installation space in the room can be significantly reduced, and a comfortable heating and cooling space can be provided. Also, since no dew condensation will occur on the front side of the indoor heat exchanger during cooling, it is possible to reliably prevent water droplets from adhering to external contact objects, and only the front side heat exchange section during heating. The air can be heated not only by the back side heat exchange section, but the heating capacity can be improved. Further, since the outflow direction of the air can be switched, it is possible to improve the heating efficiency and the cooling efficiency by blowing out the air in any direction during heating or cooling.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an indoor unit of an air-conditioning apparatus showing a first embodiment of the present invention.

FIG. 2 is a plan sectional view of the indoor unit.

FIG. 3 is a partially enlarged perspective view of a heat exchanger.

FIG. 4 is a schematic front view of an indoor unit.

FIG. 5 is a schematic side view of the indoor unit.

FIG. 6 is a schematic side view of the main part of the indoor unit.

FIG. 7 is a circuit configuration diagram of the air conditioner.

FIG. 8 is a schematic side view of main parts of the indoor unit.

FIG. 9 is a circuit configuration diagram of an air conditioner showing a modified example.

[Explanation of symbols]

1 ... Indoor unit, 2c, 2d ... Movable plate, 3 ... Heat exchanger, 3a
Front side heat exchange section, 3b Back side heat exchange section, 3i ... Air flow passage, 4 ... Blower, 6 ... Boiler, 7 ... Refrigerator.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sanano Tanno 20 Sandu Stock Association, Kotobukicho, Isesaki City, Gunma In-house

Claims (1)

[Claims] 1. An indoor heat exchanger comprising a front side heat exchange section having a heat transfer surface facing the indoor side and a rear side heat exchange section arranged on the rear side of the front side heat exchange section, and a rear side heat exchanger. An air flow passage provided in the exchange section, a blower for circulating the indoor air in the air flow passage, a high temperature side for heating the indoor air in the indoor heat exchanger, and a low temperature side for cooling the indoor air A heat medium supply means for selectively supplying the heat medium and an outflow direction switching means for switching the air outflow direction of the air flow passage between the upper side and the front side are provided, and the high temperature side heat medium is at least the front side heat exchange section. Distributed to
An air conditioner characterized in that the low temperature side heat medium is made to flow only to the back side heat exchange section.