KR20110110428A - Refrigerant condensation apparatus and movable type air-conditioner using the same - Google Patents

Refrigerant condensation apparatus and movable type air-conditioner using the same Download PDF

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Publication number
KR20110110428A
KR20110110428A KR1020100029732A KR20100029732A KR20110110428A KR 20110110428 A KR20110110428 A KR 20110110428A KR 1020100029732 A KR1020100029732 A KR 1020100029732A KR 20100029732 A KR20100029732 A KR 20100029732A KR 20110110428 A KR20110110428 A KR 20110110428A
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KR
South Korea
Prior art keywords
cooling water
heat exchanger
refrigerant
water
air
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KR1020100029732A
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Korean (ko)
Inventor
종 생 채
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주식회사 클라이온
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Priority to KR1020100029732A priority Critical patent/KR20110110428A/en
Publication of KR20110110428A publication Critical patent/KR20110110428A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/022—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing comprising a compressor cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
    • F24F1/04—Arrangements for portability
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F2006/008—Air-humidifier with water reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/12—Details or features not otherwise provided for transportable

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)

Abstract

The present invention discloses a refrigerant condenser and a mobile air conditioner using the same. According to the present invention, a heat exchanger is installed in a substantially sealed case, and a coolant is supplied to an upper side of the heat exchanger to supply air to one side of the heat exchanger to cool the refrigerant flowing in the refrigerant pipe of the heat exchanger. By supplying the cooling water to the upper part of the refrigerant pipe, the supplied cooling water flows downward while enclosing the refrigerant pipe, thereby maximizing the contact between the cooling water and the refrigerant pipe, preventing water from being dispersed in the air, and densifying the air. By supplying between the refrigerant pipes installed at intervals to form turbulent flow between the refrigerant pipes to maximize the contact between the air and the coolant and to lower the flow rate of the air passing through the heat exchanger to prevent the fine droplets of air from being discharged to the outside through the exhaust port Minimize the use of coolant and air and reduce the latent heat of coolant The present invention relates to a refrigerant condensation device that improves the cooling efficiency by fully utilizing it and a mobile air conditioner using the same.

Description

REFRIGERANT CONDENSATION APPARATUS AND MOVABLE TYPE AIR-CONDITIONER USING THE SAME}

The present invention discloses a refrigerant condenser and a mobile air conditioner using the same. According to the present invention, a heat exchanger is installed in a substantially sealed case, and a coolant is supplied to an upper side of the heat exchanger while simultaneously supplying air to one side of the heat exchanger so that the coolant flows inside the refrigerant pipe of the heat exchanger. It relates to a refrigerant condenser for cooling and a mobile air conditioner using the same.

In general, an air conditioner includes a refrigerant condenser and an evaporator. The refrigerant condenser consists of a compressor, a condenser (condensing heat exchanger, condensing coil) and a blower fan to cool the high temperature refrigerant, and the evaporator consists of an evaporator (evaporator heat exchanger, evaporation coil), a cooling fan and a capillary tube. To cool the room air.

The refrigerant condenser condenses and cools the high temperature refrigerant supplied from the evaporator to a low temperature liquid state, and is closely related to the cooling efficiency of the air conditioner. The refrigerant condenser may be classified into air cooling and water cooling according to a method of cooling the refrigerant compressed in the compressor. The air-cooled condenser cools the refrigerant by passing air around the heat exchanger (condensing coil) through which the refrigerant passes, and the water-cooled condenser cools the refrigerant by injecting cooling water into the heat exchanger through which the refrigerant passes.

In general, the air-cooled condenser has the advantage of simple configuration, but in order to secure sufficient cooling capacity, the heat exchanger and the blower are large in size and have a disadvantage of noise. Therefore, air-cooled condensers are mainly used for separate or fixed air conditioners that distinguish between outdoor and indoor units. On the other hand, the water-cooled condenser uses cooling water having a larger heat capacity than air, so that the size of the heat exchanger and the blower can be reduced and the noise is small. Therefore, the water-cooled condenser has an advantage of being applied to an integrated air conditioner in which the indoor unit and the outdoor unit are integrally combined. However, the water-cooled condenser had a limitation in that it is difficult to apply to a mobile air conditioner because the cooling water pipe for the cooling water must be installed.

On the other hand, in recent years, there is an increasing demand for a mobile air conditioner in which a refrigerant condenser and an evaporator are integrally combined in one housing. Such an integrated air conditioner may be classified into an air-cooled type and a water-cooled type according to a method of cooling a refrigerant. In the case of an air-cooled integrated type air conditioner, a large amount of indoor air must be used to cool the refrigerant, thereby lowering cooling efficiency. For example, the conventional air-cooled mobile air conditioner discharges a large amount of indoor air to the outside as the use time increases, so that the temperature of the indoor space where the air conditioner is installed does not drop substantially.

 Recently, an evaporation-water cooling refrigerant condensation apparatus has been used to reduce the amount of air used for cooling the refrigerant to improve the cooling efficiency of the indoor space. Such an evaporative-water cooling refrigerant condenser cools the heat exchanger by sprinkling or spraying the coolant to the top of the heat exchanger and simultaneously evaporates a portion of the coolant to cool the coolant.

For example, FIG. 6 is a schematic view showing an example of an evaporative-water cooled refrigerant condenser 200 according to the prior art, and FIG. 7 is an example of a heat exchanger 220 installed in the conventional refrigerant condenser 200. Figure 8 is a schematic cross-sectional view, Figure 8 is a conceptual diagram showing the action of the cooling water and air supplied from the conventional refrigerant condensation device 200.

As shown, the conventional refrigerant condenser 200 is installed in the inside of the substantially sealed case 210, the heat exchanger 220, the water spray pipe for supplying cooling water to the upper portion of the heat exchanger 220. 230 is installed, one side of the heat exchanger 220 is to install a blow fan 240 for supplying air. In addition, a reservoir 250 for storing the cooling water discharged through the heat exchanger 220 is installed at the lower portion of the case 210, and the water vapor generated in the heat exchanger 220 is included at the upper portion of the case 210. Exhaust port 270 for discharging the humid air to the outside is provided. The exhaust port 270 is connected to the exhaust pipe 280 to discharge the air generated in the case 210 to the outside.

In addition, the reservoir 250 is provided with a cooling water inlet 255 for injecting the cooling water and a cooling water circulation device 260 for supplying the cooling water of the reservoir 250 to the water spray pipe 230. The cooling water circulation device 260 is installed in the cooling water circulation pipe 263 and the cooling water circulating pipe 263 connected to supply the cooling water stored in the water storage tank 250 to the water spray pipe 230, and the cooling water of the water storage tank. It is configured to include a circulation pump 265 for pumping the water pipe (230). In addition, the heat exchanger 220 is connected to a compressor (not shown) and an evaporation heat exchanger and a high temperature liquid refrigerant supplied from the compressor flows.

As shown in FIG. 7 and FIG. 8, the conventional heat exchanger 220 has a plurality of refrigerant pipes 222 through which refrigerant flows and is installed in parallel with each other up, down, left, and right to form a rectangular parallelepiped as a whole. In this case, since the coolant pipes 222 installed up, down, left, and right are spaced at the same interval and arranged in a lattice form, a straight passage 225 is formed between the plurality of coolant pipes 222 in a lattice form. Therefore, the coolant supplied to the upper portion of the heat exchanger 220 and the air supplied to the side pass quickly through the heat exchanger 220 through the straight passage 225.

In addition, a plurality of spray pipes 230 are installed at the upper portion of the heat exchanger 220, and a plurality of nozzles 235 are installed at each of the spray pipes 230 at predetermined intervals. At this time, the spray pipe 230 and the nozzle 235, the refrigerant pipe 22 installed in the heat exchanger 22 does not have any correspondence. For example, the position of the water spray pipe 230 does not match the position of the refrigerant pipe 222, and the nozzle 235 installed in the water spray pipe 230 is also installed regardless of the position of the refrigerant pipe 222. . In general, the number of the water spray pipe 230 is smaller than the number of the refrigerant pipe 222, the number of the nozzle 235 is installed arbitrarily regardless of the length of the refrigerant pipe 222.

In addition, the sprinkling pipe 235 has a circular pipe shape, and is directly connected to the front end of the cooling water circulation pipe 263 connected to the reservoir 250. Therefore, the inside of the water spray pipe 235 is pressurized by a predetermined pressure or more by the cooling water supplied by the circulation pump 265. Therefore, the cooling water sprayed from the nozzle 235 of the water spray pipe 230 is rapidly ejected in the radial direction or fine water droplets are formed and sprayed into the air.

Referring to FIG. 8, in the conventional refrigerant condenser 200, the cooling water (CW) sprayed from the nozzle 235 of the water spray pipe 230 is not supplied directly to the refrigerant pipe 222. Sprayed. In addition, the coolant injected into the coolant tube 222 is also hardly hit by the coolant tube 222 to form a fine water drop (WD: Water Drop) is dispersed in the air. Some of the water droplets WD dispersed in the air contact the refrigerant pipe 222 to absorb heat from the refrigerant, but most of the water drops fall down through the passage 225 between the refrigerant pipes 222.

In addition, the air DA supplied from one side of the heat exchanger 220 rapidly passes through the heat exchanger 220 through a passage 225 between the refrigerant pipes 222. At this time, the fine water droplets dispersed in the air inside the heat exchanger 222 exits the heat exchanger 220 together with the fast moving air and is discharged to the outside through the exhaust port 270.

Therefore, the conventional refrigerant condenser 200 is cooled by the air DA supplied from the blower fan 240 with the refrigerant R flowing in the refrigerant pipe 222 mainly. The coolant sprayed or sprayed to the upper portion of the heat exchanger 220 crosses the air while moving along the passage 225 of the heat exchanger 220 to cool the air, or water droplets injected into the refrigerant pipe 222. ) To cool the refrigerant. At this time, the water droplets contacting the coolant cooler 222 cool the coolant using latent heat generated when evaporated by water vapor. As described above, in the conventional refrigerant condenser 200, the refrigerant flowing through the refrigerant pipe is basically cooled by air, and the cooling water is sprayed or sprayed onto the top of the heat exchanger to reduce the amount of air used to cool the air. The latent heat generated by evaporation is only used in some droplets in contact with the refrigerant tube.

Therefore, the conventional evaporative-water-cooled refrigerant condenser can reduce the amount of air used by using the cooling water, but the cooling water is discharged to the outside through the exhaust port 270 fine water droplets are dispersed in the air rapidly moving air There was a drawback of not being able to take full advantage of the latent heat. That is, since the coolant and the air mainly cross in the straight passage 225, the latent heat generated when the coolant evaporates is discharged to the outside through the exhaust port without being used to cool the refrigerant, thereby lowering the cooling efficiency. In addition, since only a part of the cooling water sprayed or sprayed is in contact with the refrigerant pipe and evaporates into water vapor, there is a problem in that the cooling efficiency is lowered as a whole.

Accordingly, the present invention is to solve the problems of the prior art, the main object of the present invention is to prevent the formation of fine droplets and to prevent the fine droplets are discharged directly to the outside, and most of the cooling water supplied It is to provide a refrigerant condensing device and a mobile air conditioner using the same by minimizing the amount of cooling water used to maximize the use of latent heat by being in contact with the refrigerant pipe.

Another object of the present invention is to allow the air passing through the meandering passages between densely installed refrigerant pipes to form turbulent flow and to move around the refrigerant pipe to maximize the contact between the cooling water and the air and to facilitate the evaporation of the cooling water. To reduce the flow rate of air passing through the heat exchanger and to prevent fine droplets of air from being discharged to the outside through the exhaust port without evaporation, thereby improving the cooling condensation device and the mobile air conditioner using the same. will be.

As a result, in the present invention, the cooling water supplied to the upper portion of the heat exchanger cools the refrigerant passing through the refrigerant pipe, and the air supplied to one side of the heat exchanger is in contact with the cooling water surrounding the refrigerant pipe to promote evaporation of the cooling water. It is to provide a water-cooled latent refrigerant condensing device and a mobile air conditioner using the same to effectively use the latent heat generated when the evaporation.

In order to achieve the above-described object, the refrigerant condensation device according to the present invention, the case forming an internal space of a predetermined size; A heat exchanger installed inside the case and composed of a plurality of refrigerant tubes; A spraying tank installed at an upper portion of the case and supplying cooling water to an upper portion of the heat exchanger; A blower fan installed at one side of the case to supply air to one side of the heat exchanger; A storage tank installed under the case to store cooling water passing through the heat exchanger; A cooling water circulation device installed between the water tank and the water spray tank to supply cooling water of the water tank to the water spray tank; And an exhaust port installed at an upper portion of the case and configured to discharge air including water vapor generated by evaporation of cooling water from the heat exchanger.

Cooling water supplied to the upper portion of the heat exchanger surrounds a plurality of refrigerant pipes installed in the heat exchanger and flows down to cool the refrigerant in the refrigerant pipe, and air supplied to one side of the heat exchanger is connected to the cooling water surrounding the refrigerant pipe. In contact with each other, the cooling water is cooled by using latent heat generated when the cooling water evaporates.

In the present invention, the heat exchanger, a plurality of circular refrigerant pipes through which the refrigerant flows is installed in parallel up, down, left and right to form a rectangular parallelepiped of a predetermined size, and the refrigerant pipes installed adjacent to the upper and lower sides are installed at a predetermined distance from side to side Comprising a stacked structure as a whole, a winding path vertically and horizontally is formed between the plurality of refrigerant pipes.

The case is a plastic injection molded product in the form of a box that forms an inner space in which the heat exchanger is installed. An upper plate is formed with an opening for installing the sprinkler, and one side plate is provided with an installation unit for installing the blower and the air blower. An injection hole for injecting air supplied from the tank is formed, and a plurality of discharge holes are formed in the bottom plate for discharging the cooling water to the reservoir.

The sprinkling tank has a box shape for storing a predetermined amount of coolant, the sprinkling plate having a size equal to or similar to that of the plane of the heat exchanger, and a plurality of sprinkling tanks formed so as to drop the coolant onto the upper surfaces of the plurality of coolant tubes provided in the heat exchanger. It consists of a dog sprayer, the inside of the water tank is in communication with the outside to maintain a state similar to the atmospheric pressure.

The plurality of spray holes are drilled to a diameter sufficient to be sprayed by gravity and the hydraulic pressure of the cooling water stored in the spray tank.

The water spray holes are formed in a line so as to coincide with the upper surfaces of the plurality of refrigerant pipes installed in parallel with the heat exchanger.

The sprinkling tank is provided with a first level sensor for sensing to maintain a constant level of the cooling water.

The water tank, and the second level sensor for detecting the cooling water to maintain a constant level. A coolant filler tube is installed to extend below the lowest level of coolant to replenish the coolant.

The cooling water circulation device. And a cooling water circulation pipe installed to extend below the level of the cooling water to supply the cooling water stored in the water storage tank, and a circulation pump installed in the cooling water circulation pipe to pump the cooling water of the water storage tank into the water spray tank. .

Subsequently, in another embodiment of the present invention, a mobile air conditioner includes: a housing having a predetermined size in which an inner space is divided into an upper space and a lower space through a horizontal plate; An evaporator heat exchanger installed in the upper space and cooling the air while vaporizing a cool liquid refrigerant, a cooling fan for supplying cold air to the outside, and a drain installed under the evaporation heat exchanger to collect condensed water An evaporator comprising a fan; A compressor installed in the lower space and configured to pressurize and liquefy the high temperature gas refrigerant supplied from the heat exchanger for the evaporator, and a heat exchanger for condenser that cools the high temperature liquid refrigerant supplied by the compressor using cooling water and air; And a refrigerant condenser including a spray tank for supplying cooling water to the heat exchanger for the condenser, and a blower fan for supplying air to one side of the heat exchanger for the condenser.

The refrigerant condenser includes a case forming an inner space of a predetermined size, the heat exchanger for the condenser is installed inside the case, the sprinkler is installed in the upper portion of the case to supply the coolant to the upper portion of the heat exchanger The blower fan is installed at one side of the case to supply air to one side of the heat exchanger, and a water reservoir is installed at a lower portion of the case to store cooling water passing through the heat exchanger. Cooling water circulation device for supplying the cooling water of the water storage tank is installed in the upper portion of the case, the exhaust port is formed in the upper portion of the case so that the humid air including the steam generated in the heat exchanger is discharged, the upper portion of the heat exchanger The cooling water supplied to the air wraps around the plurality of refrigerant pipes installed in the heat exchanger. Flows into the cooling chamber to cool the refrigerant, and the air supplied to one side of the heat exchanger is in contact with the cooling water surrounding the refrigerant pipe to promote the evaporation of the cooling water and to utilize the latent heat generated when the cooling water evaporates. It is characterized by cooling.

According to the present invention, the coolant supplied to the upper portion of the heat exchanger flows downward while surrounding the refrigerant pipe and is in sufficient contact with the plurality of refrigerant pipes, and the air supplied to one side of the heat exchanger is disposed between the refrigerant pipes installed at close intervals. It forms a turbulent flow in the contact with the cooling water surrounding the refrigerant pipe sufficiently, the cooling water surrounding the refrigerant pipe cools the refrigerant in the refrigerant pipe, the air promotes the evaporation of water vapor from the outer surface of the cooling water surrounding the refrigerant pipe The cooling water is cooled by using latent heat generated when the cooling water evaporates, and the air passes through the heat exchanger at a low speed so that the fine water droplets which are not evaporated into the water vapor are discharged only to the outside without discharging the water vapor evaporated from the cooling water to the outside. Ensuring sufficient cooling efficiency of indoor air by making sufficient use of latent heat The effect of ever improving.

1 is a schematic cross-sectional view showing an example of a refrigerant condensation device according to the present invention;
2 is a schematic cross-sectional view showing an example of a heat exchanger of a refrigerant condenser according to the prior art;
3 is a conceptual diagram showing the flow of coolant and air in a heat exchanger according to the prior art,
Figure 4 is a side view showing an example of the filter member used in the reservoir of the refrigerant condensation device according to the present invention,
5 is a schematic cross-sectional view showing an example of a mobile air conditioner using a refrigerant condensation device according to the present invention;
Figure 6 is a schematic cross-sectional view showing an example of a refrigerant condensation device according to the prior art,
7 is a schematic cross-sectional view showing an example of a heat exchanger of a refrigerant condenser according to the prior art;
8 is a conceptual view showing the flow of coolant and air in a heat exchanger according to the prior art.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the refrigerant condensation device and a mobile air conditioner using the same.

First, Figure 1 is a schematic cross-sectional view showing a refrigerant condensation device according to the present invention, Figure 2 is a schematic cross-sectional view showing an example of a heat exchanger installed in the refrigerant condensation device according to the present invention, Figure 3 The conceptual diagram showing the flow of coolant and air supplied from the refrigerant condenser.

As shown, the refrigerant condenser 100 according to the present invention, the case 110 to form an internal space 111 of a predetermined size, the heat exchanger 120 installed inside the case 110, The water spray tank 130 is installed on the heat exchanger 120 to supply cooling water, a blower 140 installed at one side of the heat exchanger 120 to supply air, and the case 110. The water tank 150 installed in the lower portion of the storage tank for storing the cooling water, the cooling water circulation device 160 for circulating the cooling water of the water storage tank 150 to the water spray tank 130, and the water vapor generated in the heat exchanger 120 It is configured to include an exhaust port 170 formed on the upper portion of the case 110 to discharge the hot and humid air including.

At this time, the heat exchanger 120 is connected to the compressor and the evaporator (not shown) to allow the high-temperature refrigerant supplied from the compressor to flow. In addition, a flexible exhaust pipe 175 is connected to the exhaust port 170, and the exhaust pipe 175 is connected to the outside through a window or the like to discharge the humid air generated from the refrigerant condenser 100 to the outside. do.

And the case 110 is a plastic injection molded in the form of a box to form an internal space 111 of a predetermined size, the upper plate is formed with an opening 113 for installing the sprinkler 130, one side plate An installation unit 141 for installing the blower 140 and an injection port 114 for injecting air supplied from the blower 140 are formed, and the coolant is discharged to the reservoir 150 in the bottom plate. A plurality of discharge holes 115 are formed to make.

At this time, the edge of the opening 113 is provided with a stepped portion 113a for installing a box-shaped watering tank 130. The installation unit 141 is formed in a box shape vertically spaced apart from a side of the case 110 by a predetermined distance, and an air inlet 143 is formed at one side thereof to allow external air to flow therein. In addition, the air inlet 143 is connected to the air inlet 114 of the case 110 so that the air introduced through the air inlet 143 is the internal space 111 of the case 110 through the inlet 114. To be supplied. In this case, the injection hole 114 is enlarged in the form of a fallopian tube, and a part of the air supplied to the lower portion of the injection hole 114 by installing the guide plate 114a in the center of the injection hole 14 can be supplied to the upper side of the heat exchanger 120. Guide to help.

Then, as shown in Figures 2 and 3, the heat exchanger 120 according to the present invention has a plurality of refrigerant pipes 122 through which the refrigerant flows is installed in parallel to the top, bottom, left and right to have a generally rectangular parallelepiped shape. In this case, the plurality of refrigerant pipes 122 are straight circular tubes of a predetermined length, and U-shaped connecting pipes (not shown) are installed at both ends of each of the refrigerant pipes 122 to communicate with each other. In addition, a plurality of cooling fins (not shown) may be installed on the outer circumferential surface of the refrigerant pipe 122 to increase the surface area.

The heat exchanger 120 according to the present invention has a structure in which a plurality of refrigerant pipes 122 are installed in parallel up, down, left, and right, and the refrigerant pipes 122, which are installed up and down, are alternately installed at a predetermined distance from side to side. Accordingly, the heat exchanger 120 of the present invention has a narrower space between the refrigerant pipes 122 and a winding path 125 vertically and horizontally between the plurality of refrigerant pipes 122 as compared with the conventional heat exchanger 220. Is formed.

In addition, as shown in Figure 2, the sprinkling tank 130 according to the present invention is made of a closed box shape to store a certain amount of cooling water, the bottom is the same or similar to the plane of the heat exchanger 120 A watering plate 131 having a size is provided. At this time, the spraying plate 131 forms the bottom of the spraying tank 130, a plurality of spraying holes to drop the coolant to the upper surface of the plurality of refrigerant pipes 122 provided in the heat exchanger 120 133 is perforated at regular intervals.

At this time, the sprinkling hole 133 has a sufficient diameter to spray the cooling water only by gravity and the water pressure of the cooling water. That is, the water spray hole 133 of the present invention has a larger diameter than the conventional nozzle. In addition, the sprinkling hole 133 is drilled to coincide with an upper surface of the plurality of refrigerant pipes 122 arranged in parallel.

 Preferably, any one of the water spray holes 133 formed in the water spray plate 131 is installed to correspond to the refrigerant pipe 122a positioned at the top of the refrigerant pipe 122 installed in the heat exchanger 120. A row of other water spray holes 133 is provided below the coolant pipe 122a of the uppermost portion and corresponding to the coolant pipe 122b provided between the coolant pipes 122a. Therefore, all of the cooling water supplied from the water spray tank 130 is supplied to the upper surface of the refrigerant pipe 122.

In addition, the sprinkling tank 130 according to the present invention, has a much larger internal space than the diameter of the cooling water circulation pipe (163). And the water tank 130 maintains a constant level of the cooling water. For example, the water level of the spray tank 130 is maintained to be located below the upper surface of the spray tank 130. Therefore, the inside of the spray tank 130 can always maintain a pressure state similar to the atmospheric pressure even when the cooling water is supplied through the cooling water circulation pipe (163).

As described above, the refrigerant condenser 100 of the present invention is formed such that the spraying hole 133 formed in the spraying plate 131 is formed to coincide with the upper surface of the refrigerant pipe 122 of the heat exchanger 120. The inside of the 130 maintains the atmospheric pressure state, the sprayer 133 is perforated to a sufficient size (for example, 0.5 ~ 3mm) to supply the cooling water only by the pressure of gravity and cooling water in the sprayer tank 130 Most of the cooling water supplied falls to the upper surface of the refrigerant pipe 122 of the heat exchanger 120.

As shown in FIG. 3, the coolant CW falling on the coolant tube 122 is not pressurized, so that the coolant tube 122 does not collide with the coolant tube 122 to be thrown out or form fine water droplets DW. It wraps around and flows down. Then, the cooling water flowing down falls again on the refrigerant pipe 122 installed below, and repeats the process of flowing downward while surrounding the refrigerant pipe 122 again. As described above, in the refrigerant condenser 100 of the present invention, since the cooling water moves downward while surrounding the refrigerant pipe 133, the contact between the cooling water and the refrigerant pipe 133 is maximized and fine droplets are not dispersed in the air. Therefore, in the refrigerant condenser 100 according to the present invention, the refrigerant in the refrigerant pipe 122 is cooled by the cooling water flowing while surrounding the refrigerant pipe 122.

Meanwhile, as shown in FIGS. 2 and 3, the air DA supplied from the blower fan 140 moves through the tortuous passage 125 formed between the densely arranged refrigerant pipes 122. . Therefore, the air DA does not pass quickly through the heat exchanger and collides with the refrigerant pipe 122 to be classified up and down to form turbulence or vortex to come into contact with the cooling water surrounding the refrigerant pipe 122. And the air in contact with the coolant promotes the evaporation of water vapor from the outer surface of the coolant. At this time, since the cooled coolant maintains contact with the coolant tube 122, latent heat generated when the coolant evaporates into water vapor cools the coolant, and the cooled coolant cools the coolant again.

In addition, the air moving along the serpentine passage 125 of the heat exchanger 120 greatly reduces the flow rate, and thus does not move relatively heavy fine water droplets to the outside and discharges only water vapor to the outside. At this time, the humid air (WA: Wet Air) inside the case 110 is not discharged by the flow rate of air DA, but inside the case 110 by air at one side of the heat exchanger 120. The pressure is discharged to the exhaust port 160.

As such, the refrigerant condenser 100 of the present invention cools the refrigerant in the refrigerant pipe 122 using the cooling water, and the air evaporates the cooling water for cooling the refrigerant, and water cooling for cooling the cooling water using the latent heat generated at this time. -It is a latent refrigerant condenser. That is, the refrigerant condenser 100 of the present invention sufficiently utilizes the latent heat generated when the cooling water evaporates because the cooling water sufficiently surrounds the refrigerant pipe 122 and the flow rate of air passing through the refrigerant pipe 122 is slow. It is characterized by.

To this end, the refrigerant condensation apparatus 100 according to the present invention supplies the cooling water supplied from the water spray tank 130 by using gravity and water pressure without pressurizing it to a high pressure. Therefore, the water stream of the cooling water supplied from the sprinkling hole 133 is supplied in such a manner as to fall on the upper surface of the refrigerant pipe 122 without being strongly hit by the refrigerant pipe 122. Here, the term 'water flow of the cooling water falls' means that the water flow of the cooling water collides with the upper surface of the refrigerant pipe 122 and is supplied at a flow rate and flow rate such that fine water droplets do not bounce off. That is, in the related art, pressurized cooling water is applied at a high pressure and sprays a high pressure water stream through a nozzle installed in a sealed water pipe, so that the sprayed water strongly strikes the refrigerant pipe and fine water droplets are dispersed in the air. However, the refrigerant condenser 100 according to the present invention is supplied to such a degree that the water flow of the cooling water falls on the upper surface of the refrigerant pipe 122, so that fine water droplets are not injected into the air. In addition, in the refrigerant condenser 100 according to the present invention, 'supplying the stream of coolant water to the upper surface of the coolant pipe' means that the stream of coolant supplied from the water spray tank 130 is not the upper surface of the coolant pipe 122. This means that it is not supplied elsewhere. That is, conventionally, since the cooling water is supplied in a radial direction toward the heat exchanger or by spraying fine water droplets, most of the cooling water is dispersed in the air without directly contacting the refrigerant pipe. However, in the refrigerant condenser 100 according to the present invention, since the stream of cooling water supplied from the water spray tank 130 is directly supplied to the upper surface of the refrigerant pipe 122, the cooling water passing through the heat exchanger without contacting the refrigerant pipe 122. Can be minimized. In addition, the refrigerant condensation apparatus 100 according to the present invention is provided between the blowing amount of the blower 140 and the refrigerant pipe 122 so that the fine water droplets contained in the air of the heat exchanger 120 are not discharged through the exhaust port 170. Adjust the interval.

As described above, the refrigerant condenser 100 of the present invention allows the cooling water to flow downward while surrounding the refrigerant pipe 122, and allows the air to come into contact with the cooling water surrounding the refrigerant pipe 122 to waste the cooling water. It is possible to greatly improve the cooling efficiency since the refrigerant is cooled by utilizing latent heat generated when the cooling water evaporates.

And the cooling water circulation device 160 of the present invention, as shown in Figure 1, the cooling water circulation pipe 163 and the cooling water circulation pipe connected to supply the cooling water stored in the reservoir 150 to the spray tank 130, Is installed in the 163 is configured to include a circulation pump 165 for pumping the cooling water of the reservoir 150 to the spray tank (130).

And the refrigerant condenser 100 of the present invention, the discharge hole 115 formed in the case 110 in order to smoothly discharge the steam and humid air generated in the heat exchanger 120 through the exhaust port 170 Should be closed. That is, the refrigerant condensation apparatus 100 of the present invention forms a pressure in the case 110 and discharges the water vapor to the outside, so that the water discharge port and the humid air are exhausted if the discharge hole 115 is not closed. 170). However, the discharge hole 115 formed in the bottom plate of the case 110 should always be opened to discharge the coolant supplied into the case 110 to the water storage tank 150, so that the discharge hole 115 is closed instead of closing the discharge hole 115. The water level of the reservoir 150 is maintained above a predetermined level to close the cooling water circulation pipe 163 and the cooling water supplement pipe 158 installed in the reservoir 150.

That is, the end of the cooling water circulation pipe 163 and the cooling water supplement pipe 158 is located below the water surface of the cooling water to discharge the air inside the case through the cooling water circulation pipe 163 or the cooling water supplement pipe 158. It can prevent. To this end, the reservoir 150 is provided with a second level sensor 157 for detecting the level of the coolant. The second water level sensor 157 is connected to the circulation pump 165 to control the circulation of the cooling water or to warn the user of the replacement of the cooling water to maintain the level of the cooling water above a certain level.

In addition, a filter member 195 is installed at the lower end of the coolant circulation pipe 163 to prevent foreign substances from flowing into the container. As shown in FIG. 4, the filter member 195 is a circular body horizontally installed inside the reservoir 150 through a through hole 193 formed at one side of the reservoir 150, and at the inner end thereof. Coupling portion 156 is coupled to the front end of the cooling water circulation pipe 163, the outer end is a drain pipe 198 protruding out of the reservoir 150, the through hole of the reservoir 150 The O-ring 193 is installed in close contact with the 152 to prevent the coolant from leaking, and a fastening means 199 for fixing the cylindrical filter member 195 to the reservoir 150 is provided. The filter 194 made of a predetermined nonwoven fabric or net is installed at a portion located inside the 150. Therefore, the filter member 195 prevents the sprinkling hole 133 of the sprinkling plate 131 from being clogged by filtering foreign substances contained in the cooling water flowing into the sprinkling tank 130.

When the filter 194 is cleaned or replaced, the coolant remaining in the water tank 150 is discharged through the drain pipe 198, and then the fastening means 199 is released and the filter member 195 is removed. When the end of the cooling water circulation pipe 156 is rotated to rotate, the cylindrical filter member 195 may be separated to the outside through the through hole 152 formed in the reservoir 150.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a mobile air conditioner to which the refrigerant condensation device according to the present invention is applied.

5 is a schematic cross-sectional view showing an example of a mobile air conditioner 300 using a refrigerant condenser according to the present invention. As shown, the mobile air conditioner 300 according to the present invention is a housing 311 to form an internal space of a predetermined size, the evaporator 350 and the refrigerant condenser 100 installed inside the housing 311 It consists of.

As shown, the housing 311 is in the form of a box made of a metal or plastic plate of a predetermined thickness, a cold air vent 318 is formed on the upper plate of the housing 311 is the cooled air flows out. The cold air vent 318 is rotatable to adjust the flow and direction of the cold air. In addition, a rear air inlet 322 is formed on the rear plate of the housing 311 and a front air inlet 326 is formed on the front plate. In addition, a predetermined display unit 325 is installed on an upper portion of the front plate of the housing 311. The interior of the housing 311 is partitioned into an upper space A and a lower space B by a horizontal plate 320. The horizontal plate 320 prevents air and noise generated from the lower space A from being transferred to the upper space A.

In addition, an evaporator 350 is installed in the upper space A defined by the horizontal plate 320. The evaporator 350 includes a cooling fan 351, an evaporator heat exchanger 353, and a drain pan 355 installed under the evaporator heat exchanger 353 to collect condensed water. The drain pan 355 is provided with a condensate discharge pipe 367 for discharging condensate. The condensate discharge pipe 367 is connected to the water spray tank (130).

Subsequently, the refrigerant condenser 100 is installed in the lower space B defined by the horizontal plate 320. The refrigerant condenser 100 is composed of a compressor 190, a heat exchanger 120 for the condenser, a blower 140, a water spray tank 130 and a reservoir 150, the heat exchanger 120 and the blower fan 140 is installed inside the case 110 of a predetermined type having an exhaust port 170 formed thereon. The water spray tank 130 is installed at the upper portion of the case 110, and the water reservoir 150 is installed at the lower portion of the case 110. The compressor 190 is installed perpendicular to the bottom of the housing 311 and is connected to the evaporator heat exchanger 120 and the condenser heat exchanger 353 through a predetermined refrigerant pipe.

 As shown in FIG. 2, the evaporator heat exchanger 120 has a plurality of coolant pipes 122 through which coolant flows in parallel up, down, left, and right to have a rectangular parallelepiped shape. In addition, the plurality of refrigerant pipes 122 are installed in parallel up, down, left and right, and the refrigerant pipes 122 installed up and down are alternately installed at a predetermined distance from side to side to have a stacked structure as a whole. Therefore, the heat exchanger 120 of the present invention is formed between the plurality of refrigerant pipes 122, the winding passage 125 in the up and down and left and right. In addition, the sprinkling tank 130 is formed in a box shape for storing a predetermined amount of cooling water, and the sprinkling plate 131 having the same size or similar to the plane of the heat exchanger 120 is installed. At this time, the spraying plate 131 forms the bottom of the spraying tank 130, a plurality of spraying holes to drop the coolant to the upper surface of the plurality of refrigerant pipes 122 provided in the heat exchanger 120 133 is perforated at regular intervals. At this time, the water spray hole 133 is made of a diameter sufficient to supply the cooling water only by gravity and the water pressure of the cooling water.

The cooling water circulation device 160 includes a cooling water circulation pipe 163 connected to the cooling water circulation pipe 163 so as to supply the cooling water stored in the water storage tank 150 to the water spray tank 130, and the storage water tank 150. It is configured to include a circulation pump 165 for pumping the cooling water of) into the spray tank (130). In addition, the reservoir 150 is provided with a second water level sensor 157 for closing the cooling water circulation pipe 163 and the cooling water supplement pipe 158 by maintaining the water level of the reservoir 150 above a predetermined level.

At this time, the tip of the cooling water supplement pipe 158 is made of a funnel shape and is installed to be exposed to the outside through the rear plate of the housing 311. And the exhaust port 170 formed in the upper portion of the case 110 is formed to be inclined to the outer upper to facilitate the installation of the exhaust pipe (175).

As described above, since the evaporator 350 and the refrigerant condenser 100 are installed in one housing 311, the mobile air conditioner 300 according to the present invention can move freely in the room. In addition, since the refrigerant condenser 100 according to the present invention fully utilizes the latent heat of the cooling water, the amount of the cooling water is very small. Therefore, since the cooling water needs to be replenished periodically through the cooling water supplement pipe 158, there is no need to install a separate pipe for supplying the cooling water. In addition, since the present invention minimizes the amount of air used for condensation of the refrigerant, that is, indoor air, there is an effect of substantially lowering the temperature of the room in which the mobile air conditioner 300 is installed even when used for a long time.

100: refrigerant condenser 110: case
111: internal space 120: heat exchanger (for condenser)
122: refrigerant pipe 125: (tortuous) passage
130: spray tank 131: spray plate
133: sprayer 140: air blowing
150: reservoir 195: filter member
158: cooling water supplement pipe 160: cooling water circulation device
163: cooling water circulation pipe 165: circulation pipe
170: exhaust port 175: exhaust pipe
300: mobile air conditioner 311: housing
350: evaporator 351: cooling fan
353: heat exchanger (for evaporator) 318: cold air vent
320: horizontal plate 322: air inlet
355: drain pan 367: condensate discharge pipe

Claims (14)

A case forming an internal space having a predetermined size;
A heat exchanger installed inside the case and composed of a plurality of refrigerant tubes;
A spraying tank installed at an upper portion of the case and supplying cooling water to an upper portion of the heat exchanger;
A blowing fan installed at one side of the case to supply air to one side of the heat exchanger;
A storage tank installed under the case to store cooling water passing through the heat exchanger;
A cooling water circulation device installed between the water tank and the water spray tank to supply cooling water of the water tank to the water spray tank;
And an exhaust port installed at an upper portion of the case and configured to discharge humid air including water vapor generated from the heat exchanger.
Cooling water supplied to the upper portion of the heat exchanger flows downward while enclosing a plurality of refrigerant tubes installed in the heat exchanger to cool the refrigerant, and air supplied to one side of the heat exchanger is in contact with the cooling water surrounding the refrigerant tube. Refrigerant condensing apparatus, characterized in that to promote the evaporation of water vapor from the outer surface of the cooling water to cool the cooling water by using the latent heat generated when the cooling water evaporates, the cooled cooling water to cool the refrigerant again. The method of claim 1,
In the heat exchanger, a plurality of circular refrigerant pipes in which refrigerant flows are installed in parallel up, down, left, and right to form a rectangular parallelepiped having a predetermined size, and the refrigerant pipes installed adjacent to each other up and down are installed at a predetermined distance from left to right to cross the stacked structure overall. Refrigerant condensation device is formed between the plurality of refrigerant pipes in the up and down and left and right winding passage. 3. The method according to claim 1 or 2,
The case is a plastic injection molded product in the form of a box to form an inner space in which the heat exchanger is installed. Inlet is formed for injecting air supplied from the, the bottom plate is a refrigerant condenser, characterized in that a plurality of discharge holes for discharging the cooling water to the reservoir. 3. The method according to claim 1 or 2,
The sprinkling tank has a box shape for storing a predetermined amount of coolant, the sprinkling plate having a size equal to or similar to the plane of the heat exchanger, and a plurality of sprinkling tanks formed so as to drop the coolant onto the upper surfaces of the plurality of coolant tubes provided in the heat exchanger. Refrigerant condensing device, characterized in that it comprises two watering holes. The method of claim 4, wherein
The sprinkling tank maintains a pressure state similar to atmospheric pressure, and the plurality of sprinkling holes are drilled to a size capable of supplying cooling water by gravity and hydraulic pressure of the cooling water stored in the sprinkling tank. 6. The method of claim 5,
The plurality of sprinkling holes are formed in a line to correspond to the refrigerant pipe provided in the heat exchanger. The method of claim 6,
The reservoir is a refrigerant condenser, characterized in that the second water level sensor for detecting the cooling water to maintain a constant level and the cooling water supplement pipe is installed to extend below the minimum level of the cooling water to replenish the cooling water. 8. The method of claim 1 or 7,
The cooling water circulation device. A cooling water circulation pipe installed to extend below the level of the cooling water so as to supply the cooling water stored in the water storage tank, and a circulation pump installed in the cooling water circulation pipe to pump the cooling water of the water storage tank into the water spray tank. Refrigerant condensing device characterized in that. A housing having a predetermined size in which an inner space is divided into an upper space and a lower space through a horizontal plate;
An evaporator heat exchanger installed in the upper space and cooling the air while vaporizing a cool liquid refrigerant, a cooling fan for supplying cold air to the outside, and a drain installed under the evaporation heat exchanger to collect condensed water An evaporator comprising a fan;
A compressor installed in the lower space and configured to pressurize and liquefy the high temperature gas refrigerant supplied from the heat exchanger for the evaporator, and a heat exchanger for condenser that cools the high temperature liquid refrigerant supplied by the compressor using cooling water and air; And a refrigerant condenser including a spray tank for supplying cooling water to the heat exchanger for the condenser, and a blower fan for supplying air to one side of the heat exchanger for the condenser.
The refrigerant condenser includes a case forming an inner space of a predetermined size, the heat exchanger for the condenser is installed inside the case, the sprinkler is installed in the upper portion of the case to supply the coolant to the upper portion of the heat exchanger The blower fan is installed at one side of the case to supply air to one side of the heat exchanger, and a water reservoir is installed at a lower portion of the case to store cooling water passing through the heat exchanger. Between the cooling water circulation device for supplying the cooling water of the water storage tank is installed, the upper part of the case is provided with an exhaust port formed so as to discharge the humid air including the steam generated in the heat exchanger,
Cooling water supplied to the upper portion of the heat exchanger flows downward while surrounding the plurality of refrigerant pipes installed in the heat exchanger to cool the refrigerant, and air supplied to one side of the heat exchanger is in contact with the cooling water surrounding the refrigerant pipe. Mobile air conditioner characterized in that the water vapor smoothly evaporates from the outer surface of the cooling water to cool the cooling water by using the latent heat generated when the cooling water evaporates, and the cooled cooling water cools the refrigerant in the refrigerant pipe again. The method of claim 9,
The heat exchanger has a plurality of circular refrigerant pipes in which refrigerant flows and is installed in parallel in up, down, left and right to form a rectangular parallelepiped having a predetermined size. A mobile air conditioner is formed between the plurality of refrigerant pipes and the winding passages up and down and left and right. 11. The method according to claim 9 or 10,
The case is a plastic injection molded product in the form of a box that forms an inner space in which the heat exchanger is installed. Mobile air conditioner is formed for injecting air supplied from the air, the bottom plate is formed with a plurality of discharge holes for discharging the coolant to the reservoir. 11. The method according to claim 9 or 10,
The sprinkling tank has a box shape for storing a predetermined amount of coolant, the sprinkling plate having a size equal to or similar to the plane of the heat exchanger, and a plurality of sprinkling tanks formed so as to drop the coolant onto the upper surfaces of the plurality of coolant tubes provided in the heat exchanger. Removable air conditioner, characterized in that made up of four sprayers. The method of claim 9,
The reservoir is a mobile air conditioner, characterized in that the second water level sensor for detecting the cooling water to maintain a constant water level and a cooling water supplement pipe installed to extend below the minimum level of the cooling water to replenish the cooling water. The method of claim 9,
The exhaust port formed in the upper portion of the case is formed to be inclined upwardly, the drain pan is installed in the lower portion of the evaporation heat exchanger is connected to the water spray tank through the condensate discharge pipe, the upper end of the cooling water supplement pipe installed in the water reservoir as a housing Mobile air conditioner characterized in that the funnel is formed to be exposed.
KR1020100029732A 2010-04-01 2010-04-01 Refrigerant condensation apparatus and movable type air-conditioner using the same KR20110110428A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101593657B1 (en) * 2014-12-26 2016-02-12 동명대학교산학협력단 Potable air conditioner
US10006646B2 (en) 2015-04-30 2018-06-26 Samsung Electronics Co., Ltd. Outdoor unit of air conditioner and control device for the outdoor unit
KR20190138911A (en) * 2018-06-07 2019-12-17 (주)아페스 Air Conditioner Having Double Cooling System
WO2020000561A1 (en) * 2018-06-29 2020-01-02 广东美的制冷设备有限公司 Movable air conditioner
KR20200014018A (en) * 2018-07-31 2020-02-10 엘지전자 주식회사 Air-conditioner and Method thereof
KR102059671B1 (en) 2019-03-05 2020-02-11 배용한 Portable cooling device
CN111632416A (en) * 2020-06-29 2020-09-08 北京百度网讯科技有限公司 Cooling device
KR102228774B1 (en) * 2019-10-16 2021-03-17 주식회사 에어라클 Air Conditioning Systems
CN112594810A (en) * 2020-11-26 2021-04-02 依米康科技集团股份有限公司 Closed circulation power type condensation system and control method
KR102630021B1 (en) * 2023-09-12 2024-01-25 박용정 Portable air conditioner

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101593657B1 (en) * 2014-12-26 2016-02-12 동명대학교산학협력단 Potable air conditioner
US10006646B2 (en) 2015-04-30 2018-06-26 Samsung Electronics Co., Ltd. Outdoor unit of air conditioner and control device for the outdoor unit
KR20190138911A (en) * 2018-06-07 2019-12-17 (주)아페스 Air Conditioner Having Double Cooling System
WO2020000561A1 (en) * 2018-06-29 2020-01-02 广东美的制冷设备有限公司 Movable air conditioner
KR20200014018A (en) * 2018-07-31 2020-02-10 엘지전자 주식회사 Air-conditioner and Method thereof
KR102059671B1 (en) 2019-03-05 2020-02-11 배용한 Portable cooling device
KR102228774B1 (en) * 2019-10-16 2021-03-17 주식회사 에어라클 Air Conditioning Systems
CN111632416A (en) * 2020-06-29 2020-09-08 北京百度网讯科技有限公司 Cooling device
CN112594810A (en) * 2020-11-26 2021-04-02 依米康科技集团股份有限公司 Closed circulation power type condensation system and control method
KR102630021B1 (en) * 2023-09-12 2024-01-25 박용정 Portable air conditioner

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