JP2004012056A - Water-cooled air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve a problem in an air-cooled out door unit where heat exchanging efficiency is low and in a water-cooled outdoor unit where there is a water problem and the device becomes large. <P>SOLUTION: An indoor unit 1 comprises an indoor heat exchanger 2 and an indoor fan 3 or the like, and it blows out cool air. A water-cooled heat exchanging unit comprises a four way valve 7, a compressor 8, a temperature compensating heat exchanger 5 arranged in a tank 6, a heat exchanger 9, a capillary tube 11 or the like. One end of the temperature compensating heat exchanger 5 is connected to a refrigerant passage between the indoor unit 1 and the four way valve 7, and another end is connected to a refrigerant passage between the capillary tube 11 and the indoor unit 1. One end of the heat exchanger 9 is connected to the four way valve 7, and another end is connected to the capillary tube 11. The temperature compensating heat exchanger 5 adjusts a water temperature of the tank 6 within a certain range. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water-cooled air conditioner.
[0002]
[Prior art]
The penetration rate of air conditioners is remarkable, and the demand is increasing. Air conditioners are always installed in shops and offices, and the interior is always comfortable. In recent years, large buildings and schools have been equipped with air conditioning and heating, making it easy to operate.
[0003]
An air conditioner is a device that adjusts the room temperature over the four seasons, cools indoor air in the summer, and switches the valve in the winter to heat the room. Warm air allows cold air to come out of the outdoor unit).
[0004]
FIG. 3 is a first schematic circuit diagram of an air-cooled air conditioner in a conventional example, and shows use in summer. In the figure, an indoor unit 1 has a built-in indoor heat exchanger 2 and an indoor fan 3, and blows cold air into the room. The outdoor unit 15 has a built-in four-way valve 7, a compressor 8, an outdoor heat exchanger 16, an outdoor fan 17, and a capillary tube 11, and blows out hot air to the outside.
[0005]
Next, circulation of the refrigerant will be described. (1) The low-temperature and low-pressure liquid sent from the capillary tube 11 is vaporized in the indoor heat exchanger 2 to cool the surroundings. The (2) high-temperature and low-pressure gas from the indoor heat exchanger 2 passes through the four-way valve 7 and is compressed by the compressor 8 to (3) become a high-temperature and high-pressure gas. The (3) high-temperature and high-pressure gas is cooled by the outdoor heat exchanger 16 via the four-way valve 7 and (4) becomes a low-temperature and high-pressure liquid. This (4) low-temperature and high-pressure liquid is converted into (1) low-temperature and low-pressure liquid by the capillary tube 11.
[0006]
FIG. 4 is a second schematic circuit diagram of an air-cooled air conditioner in a conventional example, and shows use in winter. 3 is the same as FIG. 3 except that the flow of the refrigerant flow path by the four-way valve 7 is reversed, and therefore, the description of the circuit configuration is omitted.
[0007]
Next, circulation of the refrigerant will be described. (5) The high-temperature and high-pressure gas from the compressor 8 is sent to the indoor heat exchanger 2 through the four-way valve 7. It liquefies in the indoor heat exchanger 2 and warms the surroundings. The (6) low-temperature and high-pressure liquid from the indoor heat exchanger 2 is turned into (7) a low-temperature and low-pressure liquid by the capillary tube 11. (7) The low-temperature and low-pressure liquid sent from the capillary tube 11 is vaporized in the outdoor heat exchanger 16 and absorbs heat. (8) The high-temperature and low-pressure gas that has absorbed the heat is sent to the compressor 8 via the four-way valve 7.
[0008]
This outdoor unit is installed on the floor or ceiling of a house, condominium, or building veranda, outer wall, rooftop, etc., which destroys the scenery of the building or occupies an important space. The transfer of heat is proportional to the heat transfer coefficient, and the heat transfer coefficient of water is significantly higher than that of air.
Therefore, outdoor units pumped groundwater in many cities for cooling. However, other problems with water resources, such as land subsidence caused by pumping groundwater, have arisen.
[0009]
[Problems to be solved by the invention]
Therefore, in the case of the water-cooled type, there is a cooling tower system in which water whose temperature has been raised is once used in an air conditioner or the like to be cooled by air, and water can be repeatedly used, except when using water from a river. They have a problem that they become large-scale devices.
[0010]
The present invention has been made in view of such a point, and an object of the present invention is to provide a water-cooled air conditioner which solves the above-mentioned problems of the conventional air-cooled air conditioner and water-cooled air conditioner.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, a water-cooled air conditioner according to the present invention comprises an indoor unit 1 having an indoor heat exchanger 2, an indoor fan 3, etc., a four-way valve 7 for branching four flow paths, and a compressor 8 for compressing refrigerant gas. , A temperature-compensating heat exchanger 5 installed in a water tank 6, and a water-cooled heat-exchanging unit 4 having a heat exchanger 9, a capillary tube 11, and the like. One end of the temperature-compensating heat exchanger 5 is an indoor unit. One end of the heat exchanger 9 is connected to the refrigerant flow path between the capillary tube 11 and the indoor unit 1, and one end of the heat exchanger 9 is connected to the four-way valve 7. The other end is connected to the capillary tube 11.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The generalized air-cooled outdoor unit is made of water-supplied water (water before or after use for drinking, toilet, bath, etc.) to be a water-cooled outdoor or indoor unit. In this case, the flow of water tends to be intermittent, and the temperature of the water becomes unstable. Therefore, the temperature of water is controlled by using a part of the refrigerant sent to the indoor unit.
[0013]
Originally, the water-cooled type is remarkably efficient (power saving) as compared with the air-cooled type, so the efficiency can be improved even if a part of the refrigerant is used.
[0014]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a first schematic circuit diagram of a water-cooled air conditioner according to an embodiment of the present invention, showing use in summer. In the figure, an indoor unit 1 has a built-in indoor heat exchanger 2, an indoor fan 3, and the like, and blows cool air into the room. In addition to the indoor unit 1, a four-way valve 7, a compressor 8, a temperature-compensating heat exchanger 5 installed in a water tank 6, and a water-cooled heat exchange unit 4 including a heat exchanger 9, a capillary tube 11, and the like are constituent elements. And
[0015]
The main difference from the air-cooled air conditioner of FIG. 3 in the conventional example is that the air-cooled outdoor unit 15 is water-cooled, and the installation location is not limited to the outdoors. Descriptions other than the differences are omitted.
[0016]
The temperature-compensating heat exchanger 5 installed in the water tank 6 has one end connected to the refrigerant flow path between the indoor unit 1 and the four-way valve 7, and the other end connected to the refrigerant between the capillary tube 11 and the indoor unit 1. Connected to the channel. The heat exchanger 9 in the water tank 6 has one end connected to the four-way valve 7 and the other end connected to the capillary tube 11. Further, a water temperature sensor 12 is installed in the water tank 6, and a control valve 13 is inserted between the capillary tube 11 and the other end of the temperature-compensating heat exchanger 5.
[0017]
Next, circulation of the refrigerant will be described. (1) The low-temperature and low-pressure liquid sent from the capillary tube 11 is vaporized in the indoor heat exchanger 2 to cool the surroundings. The (2) high-temperature and low-pressure gas from the indoor heat exchanger 2 passes through the four-way valve 7 and is compressed by the compressor 8 to (3) become a high-temperature and high-pressure gas. The (3) high-temperature and high-pressure gas is cooled by the heat exchanger 9 installed in the water tank 6 via the four-way valve 7 and (4) becomes a low-temperature and high-pressure liquid. This (4) low-temperature and high-pressure liquid is converted into (1) low-temperature and low-pressure liquid by the capillary tube 11. In addition, by the heat absorbing action of the temperature-compensating heat exchanger 5 installed in the water tank 6, (1) the low-temperature low-pressure liquid from the capillary tube 11 is converted into (2) high-temperature low-pressure gas and sent to the four-way valve 7. Conversely, the water in the water tank 6 is cooled.
[0018]
On the other hand, the water in the water tank 6 is cooled by the endothermic effect of the temperature-compensating heat exchanger 5 to adjust the water temperature within a certain range, so that the heat conversion efficiency of the heat exchanger 9 can be kept optimal. The amount of refrigerant flowing through the temperature-compensating heat exchanger 5 can be adjusted by the control valve 13 based on the value of the water temperature sensor 12 installed in the water tank 6.
[0019]
FIG. 2 is a second schematic circuit diagram of a water-cooled air conditioner according to one embodiment of the present invention, showing use in winter. Except that the flow of the refrigerant flow path by the four-way valve 7 is reversed, it is the same as FIG. 1 and therefore the description of the circuit configuration is omitted.
[0020]
Next, circulation of the refrigerant will be described. (5) The high-temperature and high-pressure gas from the compressor 8 is sent to the indoor heat exchanger 2 through the four-way valve 7. It liquefies in the indoor heat exchanger 2 and warms the surroundings. The (6) low-temperature and high-pressure liquid from the indoor heat exchanger 2 is turned into (7) a low-temperature and low-pressure liquid by the capillary tube 11. (7) The low-temperature and low-pressure liquid sent from the capillary tube 11 is vaporized in the heat exchanger 9 and absorbs heat. (8) The high-temperature and low-pressure gas that has absorbed the heat is sent to the compressor 8 via the four-way valve 7. Further, by the heat radiating action of the temperature-compensating heat exchanger 5 installed in the water tank 6, the high-temperature high-pressure gas from the compressor 8 is sent out to the capillary tube 11 as a low-temperature low-pressure liquid. Conversely, the water in the water tank 6 is warmed.
[0021]
On the other hand, the water in the water tank 6 is warmed by the heat radiation action of the temperature-compensating heat exchanger 5 to adjust the water temperature within a certain range, so that the heat conversion efficiency of the heat exchanger 9 can be kept optimal. The amount of refrigerant flowing through the temperature-compensating heat exchanger 5 can be adjusted by the control valve 13 based on the value of the water temperature sensor 12 installed in the water tank 6.
[0022]
【The invention's effect】
As described above, in the water-cooled air conditioner according to the present invention, since the temperature of the water in the water tank 6 in which the heat exchanger 9 is installed can be appropriately managed by the temperature-compensating heat exchanger 5, (1) the problem of water resources (2) Does not break the scenery of the building, (3) Since it is a water-cooled type, the heat transfer coefficient is much better than that of air, the whole device becomes smaller, labor saving, and (4) important (5) Eliminates the need for troublesome defrosting in winter, (6) Can be used safely even in cold regions, (7) Concerns about generation of Zionella bacteria by cooling towers There are effects such as disappearance.
[Brief description of the drawings]
FIG. 1 is a schematic circuit diagram 1 of a water-cooled air conditioner according to an embodiment of the present invention.
FIG. 2 is a second schematic circuit diagram of a water-cooled air conditioner in one embodiment of the present invention.
FIG. 3 is a first schematic circuit diagram of an air-cooled air conditioner in a conventional example.
FIG. 4 is a second schematic circuit diagram of an air-cooled air conditioner in a conventional example.
[Explanation of symbols]
Reference Signs List 1 indoor unit 2 indoor heat exchanger 3 indoor fan 4 water-cooled heat exchange unit 5 heat exchanger for temperature compensation 6 water tank 7 four-way valve 8 compressor 9 heat exchanger 11 capillary tube 12 water temperature sensor 13 control valve 15 outdoor unit 16 outdoor heat Exchanger 17 outdoor fan

Claims (1)

An indoor unit (1) having an indoor heat exchanger (2), an indoor fan (3), and the like;
Four-way valve (7) for branching four flow paths, compressor (8) for compressing refrigerant gas, heat exchanger 5 for temperature compensation installed in water tank (6), heat exchanger 9, capillary tube (11) And a water-cooled heat exchange unit (4) having
One end of the temperature-compensating heat exchanger (5) is connected to the refrigerant flow path between the indoor unit (1) and the four-way valve (7), and the other end is connected to the capillary tube (11) and the indoor unit (1). Connected to the refrigerant flow path between
A water-cooled air conditioner characterized in that one end of the heat exchanger (9) is connected to a four-way valve (7) and the other end is connected to a capillary tube (11).

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