JPH09145192A - Small-sized cooling device and small-sized cooling or heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized device and further enable the device to be easily changed over to an application for heating operation during winter season by a method wherein a water supplying type cooling heat exchanger comprised of a condenser and an absorbing device is stored in an inner space of a cooling tower of cooling water, and an evaporator and a regenerator are arranged adjacent to the cooling tower. SOLUTION: A cooling tower 1 in an absorption type cooling or heating device is a cylindrical tower having a bottom part of which entire outer shell is formed by thermal insulating material 43, wherein a surrounding atmosphere inlet port 49 at a lower circumferential wall is provided with a louver 9 and an inlet opening or closing damper 31. A top part of the cooling tower 1 is opened, its air discharging port 55 is provided with a top part port opening or closing damper 32, an electrical driving fan 8 adjacent to the damper and a gas-water separating plate 10. In addition, a nozzle 13 for injecting water 11 sucked by a circulating pump 12 from a circulating water pipe passage 56 in an upward and a downward direction is arranged at a position slightly above an inner part of the cooling tower 1. A condenser 3 is arranged at above the nozzle 13 and an absorbing device 4 is arranged at a lower part of it. A regenerator 5 and an evaporator 29 are arranged near the cooling tower 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption-type or compression-type cooling device having a cooling tower, and in particular, a main part of an outdoor unit is housed in the cooling tower to achieve downsizing and in winter. The present invention relates to a small cooling and heating device that can be easily switched to heating.

[0002]

2. Description of the Related Art In a cooling device that uses cold water as a means for condensing water vapor generated in an evaporator in a condenser to obtain cold air by heat of vaporization in the evaporator, conventionally, an air flow by a fan is provided in a separate cooling tower. Absorption-type or compression-type cooling devices have been developed which generate the cold water and send the cold water to the condenser through a pipeline. It is known that cooling at a much lower temperature than that of a simple air-cooled type is possible.
However, in the conventional system using this method, the entire equipment including the cooling tower is considerably large.

The operating principle of the absorption type cooling device will be described with reference to FIG. 7. An evaporator 60 having a low pressure inside and an air conditioner 61 in the room are connected by a loop-shaped conduit 62 so that water circulates between them. Then, water of another system is introduced from the condenser 63 into the evaporator 60, and is dropped and vaporized in the evaporator 60. As a result, the water flowing to the air conditioner 61 becomes cold water and becomes a source of cold air. In order to promote vaporization in the evaporator 60, the evaporator 60 and the absorber 64 are connected by an intake pipe 65, and in the absorber 64, water vapor taken from the evaporator 60 via the intake pipe 65 (reference numeral) (Indicated by 75) is absorbed by the absorbing liquid 66 and sent to the regenerator 67. This liquid containing water (water + absorption liquid) 76 is separated into steam 77 and an absorption liquid 66 again by heating the regenerator 67 with a burner 68 or the like, and the absorption liquid 66 is separated from another pipe (absorption liquid pipe). 69) through the absorber 64 to the absorber 64, the water vapor 77 is sent to the condenser 63 and condensed by the cold water from the separate cooling tower 70, and is dropped in the evaporator 60 as described above to become the water vapor 75 again.

[0004]

Although the absorption type cooling apparatus or the compression type cooling apparatus having the above-mentioned conventional cooling tower has good summer performance as described above, it has a large outdoor unit and is easily installed for general household use. There is a drawback that cannot be done. In particular, the conventional cooling tower is completely separated from the main equipment, and in many cases it is installed separately on the roof of the building, etc., the overall size of the device is considerably large, the weight is heavy, the equipment cost is high, and the size is small. Was not suitable for household use.

Further, in this type of cooling device, the cooling tower is intended only for producing cold water, and is not used at all when the cooling device is switched to be used for heating in winter, and the cooling tower equipment is not used at all. There was a problem of poor utilization efficiency. Further, in the conventional absorption type, the cooling device cannot be operated as an absorption heat pump to have a function for heating in winter.

[0006] Therefore, the present invention provides a cooling tower type small air-conditioning apparatus which is small in size and lightweight by making the cooling tower itself as a main part of an outdoor unit and which is highly efficient and can be easily installed for domestic use at high temperature in summer. To provide.

Further, the present invention is used not only for cooling in the summer, but also for heating in the winter by making it possible to operate the absorption heat pump system by a simple switching operation and by utilizing the water of an arbitrary low temperature heat source. It is an object of the present invention to provide a small-sized air conditioner that can be defrosted and does not have complicated defrosting.

[0008]

A small cooling apparatus according to the present invention is a cooling apparatus equipped with a cooling tower for cooling water,
An absorption type heat exchanger for cooling, which is composed of a condenser and an absorber, is housed in the internal space of the cooling tower, and various devices in the cooling tower are directly cooled by coming into contact with an air flow and a water flow inside the cooling tower. In this configuration, the regenerator and the evaporator are arranged directly adjacent to the cooling tower and integrated.

The compact cooling apparatus of the present invention is a compression type cooling apparatus equipped with a cooling tower for cooling water, wherein a cooling heat exchanger serving as a summer condenser is housed in the internal space of the cooling tower. It is configured such that it comes into contact with the air flow and water flow inside the cooling tower and is directly cooled.

Further, according to the present invention, in winter, the inlet and outlet of the normal air flow of the cooling tower are closed to stop the air flow in the tower, and only the water is circulated inside the tower to condense the condenser. And the heat generated from the absorber is received by water to be used as a hot water supply source for heating in winter as hot water, and the evaporator is supplied with a low temperature water from another low temperature heat source to be an evaporation heat source, As a result, a small air conditioner that can be heated in winter is provided.

(Operation) In the present invention, the outdoor unit portion of the absorption and compression type cooling and heating apparatus is mainly composed of the cooling tower, and the internal space of the cooling tower has the condenser and the absorption in the absorption type. In addition, all the equipment that requires cooling, such as the condenser and its condenser in the case of the compression type, are directly housed, and they are well wetted by the water flowing down in the cooling tower, and are in good contact with the air flowing in the cooling tower. By this, the cooling heat transfer is directly received on the outer surface of each part, and in the vicinity of the outside of the cooling tower, a boiler, a pump, etc. in the absorption type, and a compressor in the compression type are arranged in proximity. Therefore, a lightweight and compact integrated outdoor unit can be formed as a whole.

Further, in the present invention, the cooling tower wall is made into a good heat insulating wall in order to contribute particularly to heating in winter, and
The air inlet is closed to stop the air flow during heating in winter. And in the absorption type, the evaporator is caused to circulate and evaporate the chilled water obtained from a suitable chilled heat source, and in the condenser and the absorber in the cooling tower, the heat generated is circulated in the cooling tower. It is transmitted to the flowing water stream to generate hot water in the cooling tower, and this hot water is used as a heat source for indoor heating. Further, in the compression type, as in the conventional case, the direction of the flow of the working fluid from the compressor is reversed and the summer condenser existing in the cooling tower is reversely used as the winter evaporator, but particularly in the present invention, After stopping the air flow in the cooling tower as described above, another source of hot water such as groundwater having an appropriate low temperature is sprayed directly around the winter evaporator and the wall is allowed to flow down. Operates so that sensible heat is used as the heat source for heating.

As a result, the small-sized absorption type cooling and cooling apparatus of the present invention can increase the heating COP with respect to the amount of heat generated by the heating source of the regenerator to more than 1, and the small-sized compression type cooling and heating apparatus of the present invention is used in summer. It is possible to perform air / water cooling in the cooling tower and to use an appropriate low temperature water heat source as a heat source in winter. This practically completely eliminates the complicated work of defrosting and icing.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic vertical sectional view of a single-effect absorption type cooling and heating apparatus according to an embodiment of the present invention. Although this embodiment shows a state in which the apparatus is mainly set for indoor cooling operation in summer, it can be switched to a winter heating mode by valve operation as described later. The cooling tower 1 is a bottomed cylindrical tower body in which the entire outer shell is formed of a heat insulating material 43, and a louver 9 and an intake opening / closing damper 31 are provided at an outside air intake 49 of a lower peripheral wall. Cooling tower 1
The top of is opened to be suitable for air release inside,
The air outlet 55 is provided with a top opening opening / closing damper 32, and an electric fan 8 and a steam separating plate 10 adjacent to the damper 32.

As shown in the figure, the lower part of the cooling tower 1 is adapted to collect water 11 sent from the general tap water 33, and the lower water 11 has a constant water level so as not to flow out from the outside air intake 49 to the outside. A float type water supply valve 34 for keeping the same is attached, and further, at a position approximately in the center or slightly above the inside of the tower 1, from the cooling tower circulating water pipe 56 to the circulation pump 12
A nozzle 13 is provided for injecting the water 11 pumped up in above and below. The condenser 3 is installed above the nozzle 13 inside the tower 1 and at a position where the jet water from the nozzle 13 can be effectively received.
Similarly, the absorber 4 is provided on the lower side so as to receive the downward jet water from the nozzle. In the region from the lower side of the absorber 4 to the outside air intake port 49, a suitable cooling tower filling 14 capable of aeration and passage of water droplets is incorporated.

A regenerator 5 and an evaporator 29 are provided in the vicinity of the cooling tower 1. Further, in this embodiment, four-way valves 36, 37 and 38 for switching between cooling and heating modes.
Is provided. The cooling tower 1, the condenser 3, the absorber 4, the regenerator 5 and the evaporator 29 constitute a main part of the outdoor unit of the absorption cooling apparatus according to the present invention. In an actual machine, these devices and the four-way valve are used. 36 to 38, the pump 12 and the like are integrally fixed to an appropriate mount 50 and installed at an appropriate location outdoors.

The indoor unit 35 is, for example, an air conditioner, which cools the indoor air around the cold water pipe 54 by a fan of the indoor unit 35 and sends out cool air.
One end 54a of the No. 4 is guided to the evaporator 7 above the evaporator 29 via the four-way valve 36, and the lower part of the evaporator 29 is connected to the other end 5 of the cold water pipe 54 via the water pump 42 and the four-way valve 37.
4b, the water that has exchanged heat with the air in the room by the air conditioner is sprayed from the evaporator 7 into the evaporator 29, collected under the evaporator 29, and sent to the air conditioner as cold water.

A tank containing a heat source water 39 and a heat exchanger 40 contained in the heat source water and communicating with the evaporator 29 through the four-way valves 36, 37, 38 are used for heating in winter. It is provided (see FIG. 4). The heat source water 39 is hot water that normally maintains a temperature of 15 ° C. or higher,
For example, it can be obtained from groundwater, lake water, sewage, hot springs, industrial waste heat or drainage, solar hot water and the like.

FIG. 2 shows a condenser 3 applied to the embodiment of FIG.
FIG. 3 is a perspective view showing an example of FIG. 3, and FIG. 3 is an enlarged perspective view of the absorber 4 according to the embodiment of the present invention, with a part thereof cut away. The condenser 3 of this embodiment has a plurality of parallel pipes 1 (three in the embodiment) between the air collecting header 2 and the water collecting header 52 at both ends of the condenser.
It has a structure in which a large number of large fins 15, 16, 17 are formed on the outer circumference of these parallel pipes connected by 8, 19, 51, and the air collecting header 2 has steam above the regenerator 5. Tube 20
The water collecting header 52 is connected to the evaporator 7 of the evaporator 29 via a pipe 71 to send the water generated by condensation to the evaporator. ing.

An absorber 4 of which an example is shown in FIG.
2 and an outer tube 21, a main body of a concentric double tube, an annular upper lid 23 that closes an upper portion between the inner and outer tubes 22 and 21 of the double tube, and an annular bottom plate 24 that closes a bottom portion between the inner and outer tubes.
And a plurality of suspending metal fittings 26 arranged on the upper lid 23 at a substantially upper portion in the annular inner space 25 between the inner and outer cylinders 22 and 21.
And a concentrated solution distribution plate 27 having an inverted U-shaped cross section or an inverted cup shape and having an annular shape as a whole. The inner and outer lower end hem portions 27a and 27b of the annular distribution plate 27 are close to the wall surfaces of the inner and outer cylinders 22 and 21, respectively, with a slight gap. The liquid introduction opening 72 formed in a part of the upper lid 23 and the side portion of the regenerator 5 are the concentrated solution pipe 28.
The concentrated solution absorption liquid 78, which is a concentrated solution separated from the steam in the regenerator 5, is connected from the concentrated solution pipe 28 to the distribution plate 27.
The lower end hem portion 27 of the distribution plate 27 which is introduced above
The wall surfaces of the inner and outer cylinders 22 and 21 flow down from a and 27b. A side opening 30 is formed in the side wall of the outer cylinder 21, the opening 30 and the upper portion of the evaporator 29 are connected by a steam pipe 53, and the water vapor generated in the evaporator 29 is in the annular inner space 25 of the absorber 4. Then, it is absorbed by the absorbing liquid 78 flowing down on the space defining walls of the inner and outer cylinders 22, 21. Absorption liquid 78
For example, an aqueous solution of lithium bromide, which absorbs water vapor well at low temperature, is used. The absorbing liquid that has absorbed the water vapor is collected at the bottom of the absorber 4, and the pipe 73 and the absorbing liquid pump 41 that connect the bottom of the absorber and the lower part of the regenerator 5 are collected.
Is sent to the regenerator 5 by the burner 6 as shown in FIG.
Heated again by steam and concentrated solution (absorption liquid) 78
And separated.

Next, the summer cooling operation in the above embodiment will be described. First, the outside air intake opening / closing damper 31 of the cooling tower 1
And the top discharge opening / closing damper 32 is opened, and the fan 8 is driven, and at the same time, the pump 12 sprays water vertically from the nozzle 13. Ascending air flow 4 in the cooling tower 1
4, the air flow and the water spray from the nozzle 13 wet and cool the outer circumferences of the condenser 3 and the absorber 4, and as a result, the water vapor absorption of the absorbing liquid proceeds in the absorber 4, as described above. Therefore, in the evaporator 29, the saturation of water vapor is suppressed, and the spray water is satisfactorily vaporized by the evaporator 7, and the water circulating in the evaporator 29 and the indoor unit 35 becomes cold water in the evaporator 29, and the water in the evaporator 29 is cooled. It is sent from the lower part to the indoor unit 35 by the water supply pump 42 to achieve the purpose of cooling. The evaporator 29 is kept in a low pressure state.

FIG. 4 is a schematic view showing a state in which the absorption type cooling apparatus of the embodiment shown in FIG. 1 is switched to winter heating. Each four-way valve 3
1, 6, 37 and 38 are rotated 90 ° from the state of FIG. 1, the opening and closing dampers 31 and 32 at the top and bottom of the tower are closed, and the electric fan 8 is stopped. By simultaneously switching the four-way valves 36, 37, 38, the heat exchanger 40 for the heat source water 39 for winter heating communicates with the evaporator 29 via the valves 36, 37 as shown in the figure, and the indoor unit 35 is placed in the cooling tower 1. The water 11 is circulated through the cooling tower circulation water pipe line 56. Here, the hot water warmed through the heat exchanger 40 in the heat source water 39 enters and leaves the evaporator 29 to generate heat of evaporation, and this hot steam is brought to the absorber 4, while the cooling tower is supplied. The water 11 sprayed into the inside 1 wets the condenser 3 and the absorber 4 and removes the heat thereof to become hot water, which is sent from the pipe 56 to the indoor unit 35.
Eventually, the warm air is delivered from the indoor unit 35 to the room to reach the heating purpose. In this case, the indoor unit 35 communicating with the pipeline 56
It goes without saying that the cold water pipe 54 is a hot water pipe. In addition,
At this time, the temperatures of the regenerator 5, the condenser 3, the absorber 4 and the like rise by about 30 ° to 40 ° C, respectively, as in the conventional heat pump, compared to the cooling mode.

FIG. 5 is a schematic view of a compression type cooling device according to another embodiment of the present invention. The structure of the main body of the cooling tower 1 is shown in FIG.
The outside air intake louver 9 and the opening / closing damper 31 are attached to the peripheral wall of the lower part of the tower, and the opening / closing damper 32 and the electric fan 8 are attached to the open upper part of the tower. It is provided. Water supply 3 in tower 1
It is similar to the case of the absorption type in FIG. 1 that the water 11 is introduced from 3 and is stored in the bottom of the tower with a constant amount of water by the float type water supply valve 34. In the cooling tower 1, a condenser 3 and a suitable cooling tower filling 14 are arranged below the condenser 3. A nozzle 13 for vertically injecting water between the condenser 3 and the padding 14.
The water 11 at the bottom of the tower is sent to the nozzle 13 by the circulation pump 12 via the cooling tower circulation water pipe 56 to cool the condenser 3 and the inside of the tower.

A compressor 45 is provided outside the cooling tower 1, and the indoor unit 35, the compressor 45, and the compressor 4 are provided.
5 and the condenser 3, and between the condenser 3 and the indoor unit 35 are connected by piping, and air circulates between these. The inlet side pipe and the outlet side pipe to the compressor 45 are arranged so as to pass through the four-way valve 46 for switching between heating and cooling.

As in the case of the absorption type, a tank for storing the heat source water 39 and a heat exchanger 40 immersed in the heat source water
Is provided, and the circulation pipe of the heat exchanger 40 and the cooling tower circulation water pipe line 56 from outside the tower to the condenser 3 through the outside of the tower are shut off via the four-way valve 47 for switching between heating and cooling (FIG. 5) or It is designed to communicate (Fig. 6). In this embodiment, as shown in the drawing, both the four-way valves 46 and 47 are connected by one operation shaft, and both can be rotated by 90 ° by the operation of the handle 48 at the shaft end.

Indoor unit 35, compressor 45 and condenser 3
5 is circulated in the direction of the arrow in FIG. 5, the condenser 3 is well cooled by being bathed by the water flow from the nozzle 13 and the air flow 44 by the fan 8 in the cooling tower 1. The cooling air is sent from 3 to the indoor unit 35 to achieve the cooling purpose.

When the compression type cooling device is used for heating in winter, the handle 48 is operated to operate the four-way valves 46, 47.
Is rotated at a right angle, and at the same time, the opening / closing damper 31,
32 is closed and the fan 8 is stopped. As shown in FIG. 6, the pipe of the heat exchanger 40 is connected to the tower 1 through the four-way valve 47.
The compression direction of the compressor 45 is reversed so as to communicate with the cooling tower circulating water pipe line 56 for circulating the water therein, and also so that the air flow circulates from the indoor unit 35 to the condenser 3 via the compressor 45. Water warmed by the heat source water 39 circulates in the cooling tower 1 to create a warm atmosphere in the tower, and this warm water gives heat to the condenser 3 to generate warm air from the upper part of the condenser 3 to the indoor unit 35.
Sent to achieve the heating purpose.

When the present invention is constructed as a small-sized cooling device having only a cooling function, the structure shown in FIGS.
The four-way valves 36 to 38 and the four-way valves 46 and 47 may be removed in the pipe connection state of the embodiment. Further, the condenser 3 or the absorber 4 in the above-mentioned embodiment is one example, and the present invention is not limited to the condenser and the absorber of this structure, and the four-way valve also has the same function. Needless to say, it may be constituted by a switching valve.

[0029]

As described above, according to the present invention, in an absorption type cooling or heating / cooling facility having a cooling tower, the main part of the outdoor unit is housed and integrated in the cooling tower itself which has been conventionally installed separately. As a result, the entire device becomes a very compact, lightweight, low-priced device, and since the absorber and condenser are inside the cooling tower, it also absorbs and condenses water vapor well, and is an efficient cooling device even at high temperatures in summer. Is obtained. Since it does not use CFCs at all, there are no problems with pollution, and there are significant effects such as easy installation for general household use. Further, when the conventional heating operation is performed, the cooling tower is not used at all and is left as it is, but in the present invention, the entire absorption system including the cooling tower is the same as during the summer cooling even during heating. It becomes easy to operate and effectively utilize the water of any low temperature heat source to achieve the absorption heat pump type heating, and the heating COP becomes higher than 1, resulting in epoch-making energy saving and environmental improvement.

Also in the case of the compression type cooling apparatus of the present invention, since the cooling tower is used, the performance at high temperature in summer is high and the required air amount is reduced as compared with the case of exclusive use for normal air cooling, and therefore the outdoor unit. However, it is compact, quiet, and has a vertical shape as a whole, which saves space and enables heating by a heat pump system that uses heat source water such as ultra-low temperature water in the winter.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing an example of a small-sized absorption type cooling device according to an embodiment of the present invention.

FIG. 2 is an external perspective view showing an example of a condenser applied to the apparatus of FIG.

3 is a partially cutaway enlarged perspective view of an absorber applied to the apparatus of FIG. 1. FIG.

FIG. 4 is a schematic side cross-sectional view of the small-sized absorption type air conditioner according to the embodiment of the present invention, which is switched to the winter heating mode.

FIG. 5 is a schematic side sectional view showing an example of a compact compression type cooling device according to another embodiment of the present invention.

FIG. 6 is a schematic side cross-sectional view of the compact compression type cooling device according to the exemplary embodiment of the present invention in a state where the mode is switched to the winter heating mode.

FIG. 7 is a schematic diagram showing the principle of a general absorption type cooling device.

[Explanation of symbols]

 1 Cooling Tower 3 Condenser 4 Absorber 5 Regenerator 7 Evaporator 8 Electric Fan 9 Louver 11 Lower Water 12, 41, 42 Pump 13 Nozzle 29 Evaporator 31, 32 Open / close Damper 33 Water Supply 35 Indoor Unit 36, 37, 38, 46 , 47 Four-way valve 39 Low temperature heat source water 40 Heat exchanger 45 Compressor

Claims (6)

[Claims] 1. A cooling device equipped with a cooling tower for cooling water, wherein an absorption type heat exchanger for cooling, comprising a condenser and an absorber, is housed in the internal space of the cooling tower, and various types in the cooling tower are provided. A small air conditioner characterized in that the equipment is configured to come into contact with an air flow and a water flow inside the cooling tower to be directly cooled, and an evaporator and a regenerator equipped with an evaporator are arranged adjacent to the cooling tower. 2. The absorber is composed of a concentric double-tube closed container having a vertical central axis and having a vertical inner wall surface as an absorbing surface through which a concentrated solution flows down. The small air conditioner according to claim 1. 3. An evaporator and a regenerator having an evaporator, which accommodates an absorption-type heat exchanger for cooling and heating, which comprises a condenser and an absorber, in an internal space of a cooling tower having a water injection means therein. A first four-way valve is provided in a pipe line connecting the indoor unit and the evaporator, and a second four-way valve is provided in a pipe line connecting the indoor unit and the bottom water outlet of the evaporator. A heat exchanger for exclusive use of heating in which a third four-way valve is provided in a cooling tower circulating water pipe line for circulating water at the bottom of the cooling tower so as to inject it into the condenser and the absorber. In a cooling operation in the summer, the pipe of the heat exchanger dedicated to heating forms a closed circuit through the first to third four-way valves, and various devices inside the cooling tower are inside the cooling tower. It is constructed so that it is cooled directly by contact with the air flow and water flow. During heating, the switching of the first to third four-way valve, with the indoor unit and the cooling tower circulating water lines through said third four-way valve is communicated,
The pipe of the heat exchanger dedicated to heating, the bottom water outlet of the evaporator, and the evaporator are configured to communicate with each other via the first and second four-way valves, and normal air of the cooling tower is provided in winter. The inlet and outlet of the flow are closed to stop the air flow in the tower, and the evaporator is supplied with slightly warm water from the other heat source to be the evaporation heat source, and only water is circulated inside the tower. A small cooling and heating apparatus characterized in that heat generated from the condenser and the absorber is received by water in the cooling tower, and the water is sent to the indoor unit as hot water to serve as a heating source in winter. 4. The absorber is constituted by a concentric double-tube closed container having a vertical central axis and having a vertical inner wall surface as an absorption surface through which a concentrated solution flows down. The small air conditioner according to claim 3. 5. A cooling device equipped with a cooling tower for cooling water, wherein a compression type heat exchanger for cooling having a summer condenser is housed in an internal space of the cooling tower, and various equipments in the cooling tower. Is configured to be directly cooled by coming into contact with the air flow and the water flow inside the cooling tower, and the compressor is provided in the pipeline extending from the indoor unit to the inlet side of the summer condenser and adjacent to the cooling tower. A characteristic small air conditioner. 6. A compression type cooling and heating heat exchanger having a summer condenser is housed in the internal space of a cooling tower having water injection means inside, and a compressor is provided from an indoor unit to the inlet side of the summer condenser. A first four-way valve is provided in the pipeline and adjacent to the cooling tower, and a first four-way valve is provided in the pipeline from the indoor unit to the summer condenser, and water at the bottom of the cooling tower is injected into the summer condenser. A second four-way valve is provided in the cooling tower circulation water pipe that is circulated as described above, and a heat-dedicated heat exchanger that exchanges heat with another heat source is separately installed, and during the cooling in summer, the pipe of the heat-dedicated heat exchanger is installed. The passage forms a closed circuit via the second four-way valve, and various devices in the cooling tower are brought into contact with the airflow and water flow inside the cooling tower to be directly cooled, and during heating in winter, the first 1 and switching of the second four-way valve , The operation direction of the compressor is reversed to cause the summer condenser in the cooling tower to function as an evaporator, and the pipe of the heat-dedicated heat exchanger and the cooling tower circulation water pipe have the second four-way valve. Through the cooling tower circulating water, which is configured to communicate with each other, and which keeps the air flow of the cooling tower stopped and warms the area around the summer condenser in the heating dedicated heat exchanger by the other heating source. A small cooling and heating apparatus characterized in that it is heated by being wetted by jetting, and the evaporation heat generated thereby is sent to the indoor unit to be used as a winter heating source.