KR101179030B1 - Water cooling type air conditioner - Google Patents

Abstract

The present invention relates to a water-cooled air conditioner, and more particularly, to a water-cooled air conditioner having a flow rate control means to control the flow rate of the cooling water according to the load capacity.

The water-cooled air conditioner according to the present invention includes a first heat exchanger in which air in an indoor space for air conditioning is heat-exchanged, a second heat exchanger in communication with the first heat exchanger and a pipe, and a heat exchanger between the refrigerant and the coolant, A cooling water supply unit which is formed in a second heat exchanger and is a passage through which cooling water is supplied to the internal space of the second heat exchanger, a cooling water supply branch pipe which is engaged with the cooling water supply unit to guide the flow of the cooling water, and the second space according to the load capacity of the indoor space. In order to control the supply amount of the cooling water supplied into the heat exchanger, a flow rate control means provided on one side of the cooling water supply branch pipe, the flow rate control means, the coolant temperature sensor and the flow rate control to sense the temperature of the cooling water A main microcomputer for controlling the means, wherein the main microcomputer is configured to generate an image through a temperature sensed by the coolant temperature sensor. The flow rate of the coolant flowing into the internal space of the second heat exchanger is calculated, and when the load capacity of the indoor space increases, the flow rate control means controls the supply amount of the cooling water to increase, and load capacity of the indoor space. When this decreases, the flow rate control means is characterized in that to control the supply amount of the cooling water to be reduced.

According to the water-cooled air conditioner according to the present invention configured as described above, it is possible to efficiently flow the cooling water, there is an advantage that the burnout of the outdoor heat exchanger is prevented.

Water cooling, air conditioner, outdoor side, outdoor heat exchanger, flow control means, coolant supply pipe, coolant flow rate calculation

Description

Water Cooling Air Conditioner {Water cooling type air conditioner}

1 is a schematic installation state diagram showing an installation state of a general detachable air conditioner according to the prior art.

Figure 2 is a block diagram showing the configuration of a conventional split type air conditioner according to the prior art.

Figure 3 is a schematic installation state showing an installation state of a water-cooled air conditioner employing a preferred embodiment according to the present invention.

Figure 4 is a block diagram showing the configuration of a water-cooled air conditioner employing a preferred embodiment of the present invention.

5 is a perspective view showing the outdoor unit appearance of a water-cooled air conditioner employing a preferred embodiment of the present invention.

Figure 6 is an exploded perspective view showing the internal configuration of a water-cooled air conditioner outdoor unit employing a preferred embodiment of the present invention.

Figure 7 is a block diagram showing the configuration of a water-cooled air conditioner outdoor unit employing a preferred embodiment of the present invention.

8 is a schematic view showing a state in which a flow rate control means which is a main component of a water-cooled air conditioner employing a preferred embodiment of the present invention is mounted.

Explanation of symbols on the main parts of the drawings

100. Indoor unit 120. First heat exchanger

140. Expansion valve 200. Outdoor unit

210. Cabinet 211. Front panel

212 Left panel 213. Right panel

214. Rear panel 215. Top panel

216.Base 220.Frame

222.Horizontal Frame 224.Horizontal Frame

230. Second heat exchanger 231. Cooling water supply

232. Coolant recovery section 233. Refrigerant inlet section

234. Refrigerant outlet 235. Mounting bracket

236. Auxiliary Bracket 237. Front Bracket

238. Rear bracket 240. Flow control means

242. Coolant temperature sensor 250. Control box

252. Control box cover 260. Compressor

261. Constant Speed Compressors 262. Inverter Compressors

263. Myobacterial tube 264. Accumulator

265. Oil separator 266. Oil return line

267. Oil separator check valve 268. Hot gas pipe

269. Hot gas valve 270. Refrigerant control valve

280. Outdoor check valve 281. Outdoor solenoid valve

282. Supercooler 300. Refrigerant piping

400. Cooling tower 420. Cooling water supply pipe

422. Coolant Supply Basin 440. Coolant Recovery Pipe

442. Coolant Recovery Branch Pipe 444. Coolant Recovery Valve

460. Cooling water pump A. Air conditioning chamber

The present invention relates to a water-cooled air conditioner, and more particularly, to a water-cooled air conditioner having a flow rate control means to control the flow rate of the cooling water according to the load capacity.

An air conditioner is a cooling / heating device that cools or heats air in an indoor space, such as an office or a house, and constitutes a series of cycles including compression, condensation, expansion, and evaporation. The air conditioner mainly discharges condensation heat or evaporation heat to the outdoor space by using the air in the outdoor space.

In addition, as is known, an air conditioner is generally an integral air conditioner in which an indoor unit that heats a refrigerant in an indoor space and an outdoor unit that heat exchanges refrigerant flowing from the indoor unit is integrally formed, and the indoor unit and the outdoor unit are separated, and the indoor unit is installed in an indoor space. The indoor unit is divided into a separate air conditioner installed in the outdoor space.

In addition to cooling / heating, air conditioners have recently been equipped with air purifying functions that suction and filter indoor contaminated air, and then return clean air to the room, and dehumidification function to re-inject humid air into wet and dry air. It will perform additional functions.

Hereinafter, with reference to the accompanying drawings to look at the separate type air conditioner is mounted separately from the indoor and outdoor units.

FIG. 1 is a diagram illustrating an installation state of a conventional separate type air conditioner according to the prior art, and FIG. 2 is a block diagram showing the configuration of the air conditioner according to the prior art and the flow of refrigerant. It is.

Looking at the split type air conditioner with reference to the drawings, the split type air conditioner is installed by connecting a plurality of indoor units 50 to one outdoor unit 1. Between the outdoor unit 1 and the indoor unit 50, a high pressure tube 80 through which a high pressure refrigerant having a relatively high pressure flows and a low pressure tube 90 through which a low pressure refrigerant having a relatively low pressure flows are communicated with each other. The refrigerant, which is a working fluid, is installed to circulate.

The internal space of the outdoor unit 1 is provided with a compressor 10 for compressing a refrigerant, which is a working fluid, at a high temperature and high pressure. The compressor 10 includes a constant speed compressor 10 'for constant speed operation and an inverter compressor for variable speed operation. 10 ". That is, the refrigerant is compressed and circulated in the compressor 10 according to the capacity of the load required by the indoor unit 50. The outlet side of the compressor 10 is an operating mode of the air conditioner. It is connected with the four-way valve 12 for changing the direction of the refrigerant according to.

The accumulator 20 is mounted on the side of the compressor 10. The accumulator 20 separates only the refrigerant in the gas state from the refrigerant flowing into the compressor 10 to flow into the compressor 10.

An outdoor heat exchanger 30 is provided on the side of the internal space of the outdoor unit 1. The actual heat exchanger 30 is formed such that a circular pipe having a predetermined diameter is bent a plurality of times so that the refrigerant flows therein. When the refrigerant flows into the bent circular pipe, the air in the outer space passes between the circular pipes and exchanges heat with the refrigerant.

As described above, a plurality of components are installed in the internal space of the outdoor unit 1 to compress and heat exchange the refrigerant, and the refrigerant flows with the internal space of the indoor unit 50 by these components.

An indoor heat exchanger 60 is provided inside the indoor unit 50. The indoor heat exchanger (50) is formed by bending a plurality of circular pipes having a predetermined diameter so that refrigerant flows therein, and expanding the refrigerant at a low pressure by expanding the refrigerant at the inlet of the indoor heat exchanger (60). 70 is provided.

Therefore, the compressor 10, the four-way valve 12, the accumulator 20, the outdoor heat exchanger 30, and the like are mounted in the internal space of the outdoor unit 1, and the indoor unit 50 has an indoor heat exchanger. 60 and expansion valve 70 are mounted.

However, the following problem occurs in the separate type air conditioner according to the prior art configured as described above.

According to the separate type air conditioner according to the related art configured as described above, the refrigerant flowing in the outdoor heat exchanger 30 is heat-exchanged with air in the external space. Therefore, a problem arises in that the size of the outdoor heat exchanger 30 increases as the heat exchange efficiency is improved when the outer surface of the outdoor heat exchanger 30 is in contact with the air in the external space.

As the size of the outdoor heat exchanger 30 increases, the size of the outdoor unit 1 increases, and as the size of the outdoor unit 1 increases, the space in which the outdoor unit 1 is provided increases. .

In addition, as the refrigerant flowing in the outdoor heat exchanger 30 is heat-exchanged with the air in the external space, a problem occurs that the heat exchange efficiency varies according to the temperature of the external space air. That is, when the air temperature of the outer space becomes a high temperature, the refrigerant flowing in the interior of the outdoor heat exchanger 30 is heat-exchanged when the heat exchanged with the outside air, and when the air temperature of the outer space becomes a low temperature, the outdoor heat exchanger ( When the refrigerant flowing in 30 is heat exchanged with the outside air, a problem occurs that the heat exchanged at low temperature.

As such, as the temperature of the refrigerant that is heat exchanged according to the air temperature of the external space is not constant, a problem occurs that the air temperature of the indoor space that is heat exchanged again with the heat exchanged refrigerant is not constant.

In addition, as the heat exchange efficiency decreases, there arises a problem that the use of energy for using the air conditioner increases. Increasing the use of energy causes a problem that the maintenance cost of using the air conditioner increases.

In addition, when the refrigerant and the outside air exchange heat, the air passing through the outdoor heat exchanger 30 always flows in a constant amount. As such, when a predetermined amount of air passes through the outdoor heat exchanger 30, it is impossible to control the degree of heat exchange according to the load capacity added to the air conditioner, resulting in a problem that energy consumption of the air conditioner is not efficient. Done.

That is, even when the load capacity is large, the heat exchanged with the refrigerant while passing a certain amount of air, and even when the load capacity is low, the heat exchanged with the refrigerant while the constant amount of air passes, so that the temperature of the refrigerant to be heat exchanged is always constant. The problem arises in that the refrigerant temperature when the capacity is large and the refrigerant temperature when the load capacity is small are the same.

Due to this problem, when the load capacity is large, a problem occurs that the operation time of the air conditioner is long, and when the load capacity is small, the compressor is stopped and the refrigerant is continuously heat exchanged even if the circulation of the refrigerant is stopped. do.

Continuous heat exchange of the refrigerant in a state where the circulation of the refrigerant is unnecessary causes a problem that causes unnecessary waste of energy, and a problem of increasing maintenance cost for operating the air conditioner due to waste of unnecessary energy.

In addition, unnecessary operation of the cooling water pump for flowing the cooling water causes problems such as waste of energy and shortening of the life of the cooling water pump. Due to such a waste of energy and shortening the life of the cooling water pump, a problem that the reliability of the product is lowered.

Water-cooled air conditioner according to the present invention for solving the above problems is to provide a water-cooled air conditioner is provided with a flow rate control means capable of controlling the amount of cooling water flow.

Another object of the water-cooled air conditioner according to the present invention is to provide a water-cooled air conditioner capable of detecting the flow of cooling water.

The water-cooled air conditioner according to the present invention for achieving the above object is in communication with the first heat exchanger, the first heat exchanger is a heat exchange between the air in the indoor space for air conditioning, the first heat exchanger and the pipe, the refrigerant and the coolant heat exchange A second heat exchanger that is formed in the second heat exchanger, a cooling water supply unit that is a passage through which the cooling water is supplied to the internal space of the second heat exchanger, a cooling water supply branch pipe that is engaged with the cooling water supply unit, and guides the flow of the cooling water, and an indoor space In order to control the amount of cooling water supplied to the second heat exchanger according to the load capacity of the flow rate control means provided on one side of the cooling water supply branch pipe, the flow rate control means is provided, and detects the temperature of the cooling water And a main micom for controlling the coolant temperature sensor and the flow rate control means, wherein the main micom includes: The flow rate of the cooling water flowing into the internal space of the second heat exchanger is calculated based on the temperature sensed by the water temperature sensor, and when the load capacity of the indoor space is increased, the flow rate control means may increase the supply amount of the cooling water. And when the load capacity of the indoor space is reduced, the flow rate control means controls the amount of cooling water to be reduced.
The flow control means is formed by the solenoid valve, characterized in that configured to enable the control of the opening degree of the valve.
The main microcomputer, if it is recognized that the flow of the cooling water is not smooth, generates an abnormal signal, or characterized in that the control to stop the operation.
The flow rate control means is characterized in that for controlling the flow rate of the cooling water in accordance with the temperature and the indoor load capacity of the cooling water supplied to the inside of the second heat exchanger.
Cooling water temperature sensing step of detecting the temperature of the cooling water flowing into the internal space of the second heat exchanger, and the flow rate of the cooling water flowing to the internal space of the second heat exchanger using the temperature detected in the cooling water temperature detection step The load is detected by determining a flow rate sensing step, a load capacity sensing step sensing a load capacity required for an air conditioner, a temperature of the coolant detected in the coolant temperature sensing step, and a flow rate of the coolant detected in the flow rate sensing step. And a comparison step of comparing with the load capacity detected in the capacity sensing step, and in accordance with the comparison result of the comparison step, when the amount of cooling water is too small to support the load capacity, the supply amount of the cooling water is increased by the flow control means. When the amount of cooling water is large enough to cover the load capacity, the flow rate control means It is characterized in that the supply amount of the cooling water decreases.
When the load capacity is increased, the flow rate control means is operated to increase the flow rate of the coolant flowing into the second heat exchanger, and when the load capacity is decreased, the flow rate control means is operated to reduce the flow rate of the coolant. It is characterized by.
According to the water-cooled air conditioner according to the present invention configured as described above, it is possible to efficiently flow the cooling water, there is an advantage that the efficiency of the air conditioner is improved.

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In the case of the multi-type water-cooled air conditioner, the indoor unit and the outdoor unit are separately installed, and indoor units suitable for each indoor space are installed to harmonize the indoor space. At this time, the indoor unit and the outdoor unit are connected to the refrigerant pipe. The refrigerant pipe is configured to heat exchange while moving between the indoor unit and the outdoor unit to harmonize the indoor space.

On the other hand, in the case of an integrated water-cooled air conditioner, the indoor unit and the outdoor unit are not separately installed, but are integrally formed. The indoor discharge port and the indoor suction port suitable for each indoor space are installed to harmonize the air of the indoor space. At this time, the indoor space and the air conditioner are connected by a duct. Harmonized air and air in the indoor space flow along these ducts to harmonize the indoor space.

Hereinafter, a multi-type air conditioner will be described with reference to an exemplary view of a water-cooled air conditioner configured as described above.

Figure 3 is a schematic diagram showing the installation of the water-cooled air conditioner employing a preferred embodiment according to the present invention, Figure 4 is a configuration of a water-cooled air conditioner employing a preferred embodiment according to the present invention A block diagram showing is shown.

With reference to Figures 3 and 4 will be described the embodiment of the water-cooled air conditioner according to the present invention installed. Water-cooled air conditioners are installed to harmonize the interior spaces of large buildings and high-rise buildings including a plurality of interior spaces. Accordingly, a building in which a water-cooled air conditioner is installed is provided with a plurality of indoor spaces, and a water-cooled air conditioner is installed in order to harmonize the indoor space.

In the water-cooled air conditioner according to the present invention, indoor units 100 are respectively installed in a plurality of indoor spaces provided in the interior of a building, and a plurality of indoor units 100 and pipes are installed in the side of the indoor space in which the indoor unit 100 is installed. An air conditioning room A in which the outdoor unit 200 connected by the is installed is provided.

On the other hand, in the water-cooled air conditioner composed of an integrated air conditioner rather than a multi-type air conditioner according to an embodiment of the present invention, each indoor space and the air conditioner are connected by separate ducts, and the air is harmonized in the internal space of the air conditioner. The air flows through the duct into each indoor space to harmonize the indoor space.

At this time, by controlling the flow of the harmonious air flowing to each indoor space to prevent the harmonized air flow into unnecessary spaces, and to harmonize the indoor space to suit the conditions of each indoor space of the harmonized air It will prevent consumption.

Each indoor space is equipped with the indoor unit 100 of a type suitable for the indoor space to harmonize the indoor space. That is, the indoor unit 100 can be used in a variety of models, such as the stand type, ceiling type, wall-hung type, is installed according to the user's choice. The indoor unit 100 is installed to communicate with the outdoor unit 200 and the refrigerant pipe 300, and the refrigerant pipe 300 guides the refrigerant flow between the indoor unit 100 and the outdoor unit 200.

The indoor unit 100 is installed in an indoor space for air conditioning, and the air in the indoor space is harmonized to suit the user's intention by sucking the air in the indoor space, exchanging heat with the refrigerant, and then re-injecting the heat-exchanged air into the indoor space. Let's go. The indoor unit 100 is used indoor unit 100 of the shape suitable for the indoor space for air conditioning.

That is, the indoor unit 100 is to install the indoor unit 100 of a shape suitable for the size or shape, use, etc. of the indoor space, the indoor unit 100 is mainly installed in the stand type, ceiling type, wall-hung type and the like.

It is installed to connect between the indoor unit 100 and the outdoor unit 200, the refrigerant pipe 300, the refrigerant flows into the internal space is formed into a circular pipe shape having a predetermined diameter, the working fluid to the internal space The refrigerant will flow. Therefore, the refrigerant pipe 300 is installed to branch to each indoor unit 100 in the pipe connected from the outdoor unit 200.

On the other hand, a cooling tower 400 for cooling water to form cooling water is installed on the roof of a building in which a water-cooled air conditioner is installed. The cooling tower 400 forms the cooling water by cooling the water by directly contacting water with air.

That is, when the water comes in contact with the cold air, part of the water is evaporated to take the heat required for evaporation from the surroundings to lower the water temperature (水溫). By using this phenomenon, the cooling tower 400 flows water from above to below, and injects air from the lower end to cool the water.

The cooling water generated inside the cooling tower 400 is guided by the cooling water supply pipe 420 and is supplied to the internal space of the outdoor unit 200. The cooling water supply pipe 420 is formed in a circular pipe shape with an empty internal space and extends downward along the outer wall of the building.

The cooling water supply pipe 440 is installed at the side of the cooling water supply pipe 420 to guide the cooling water heat-exchanged with the refrigerant that is a working fluid in the internal space of the outdoor unit 200 to the cooling tower 400. The cooling water recovery pipe 440 is formed in a hollow circular pipe shape is installed along the outer wall of the building, the end is installed to communicate with the upper end of the cooling tower 400.

Therefore, the coolant generated in the internal space of the cooling tower 400 is guided by the cooling water supply pipe 420 and flows into the internal space of the outdoor unit 200, and the refrigerant which is a working fluid in the internal space of the outdoor unit 200. The heat-exchanged coolant is guided by the coolant recovery pipe 440 to flow to the upper end of the cooling tower 400 and then cooled again in the internal space of the cooling tower 400 to flow into the internal space of the outdoor unit 200. do.

The cooling water supply pipe 420 is equipped with a cooling water pump 460 to supply the cooling water generated in the cooling tower 400 to the internal space of the outdoor unit 200 at a constant pressure.

The coolant supply pipe 420 and the coolant recovery pipe 440 extend along the outer wall of the building and are branched to each outdoor unit 200 to flow the coolant into the internal space of the outdoor unit 200. That is, the cooling water supply pipe 420 and the cooling water supply branch pipe 422 and the cooling water recovery branch pipe 442 branched from the cooling water recovery pipe 440 are installed to penetrate the side surface of the air conditioning room A, thereby cooling the outdoor unit 200. You will be guided to the interior space of.

As such, the cooling water supply branch pipe 422 branched from the cooling water supply pipe 420 to supply the cooling water to the internal space of the outdoor unit 200 is formed so that one end thereof communicates with the cooling water supply pipe 420, and the other end is the outdoor unit. It is drawn into the interior space of 200. The cooling water recovery branch pipe 442 drawn out from the internal space of the outdoor unit 200 is installed such that an end thereof communicates with the cooling water recovery pipe 440.

The coolant recovery branch pipe 442 is equipped with a coolant recovery valve 444 so that the coolant supplied from the cooling tower 400 to the internal space of the outdoor unit 200 is heat-exchanged with the coolant and then to the coolant recovery branch pipe 442. It is to control the flow of recovered cooling water.

That is, when the air conditioner is normally used, the coolant recovery valve 444 is opened to recover the coolant that is heat-exchanged with the coolant in the internal space of the air conditioner to the cooling tower 400, among a plurality of layers. When the air conditioner installed in one floor is not used, the cooling water recovery valve 444 is shielded so that the cooling water filled in the internal space of the air conditioner is not recovered to the cooling tower 400.

As such, to prevent the coolant filled in the internal space of the air conditioner from being recovered to the cooling tower 400, the coolant filled with the refrigerant during the initial operation of the air conditioner when the air conditioner does not operate when necessary is operated. This is to prevent the compressor from being burned out by preventing the hot refrigerant from flowing into the compressor by cooling the refrigerant by heat exchange.

In addition, a boiler 480 is provided on the side of the cooling tower 400. The boiler 480 is operated when the water-cooled air conditioner is operated in a heating mode or using hot water, that is, to prevent freezing of the cooling water, and the cooling water generated in the cooling tower 400 passes through the boiler 480 to the outdoor unit. Flow into the interior space of 200.

Inside the indoor unit 100, a first heat exchanger 120 is installed to harmonize the space in which the indoor unit 100 is installed by sucking air in the indoor space and exchanging heat with the refrigerant. The first heat exchanger 120 is formed by bending a round pipe having a predetermined diameter a plurality of times, and a refrigerant, which is a working fluid, flows inside the first heat exchanger 120.

An expansion valve 140 is provided at the inlet side of the first heat exchanger 120. The expansion valve 140 serves to reduce the pressure of the refrigerant by expanding the refrigerant passing through. That is, the high pressure refrigerant flows into the refrigerant flowing into the expansion valve 140, and the low pressure refrigerant discharges the refrigerant discharged through the expansion valve 140.

The refrigerant pipe 300 is connected between the indoor unit 100 and the outdoor unit 200 so that the refrigerant flows. The refrigerant pipe 300 includes a high pressure pipe through which a high pressure refrigerant flows, and a low pressure pipe through which a low pressure refrigerant flows, and is branched from the refrigerant pipe 300 connected to the outdoor unit 200 to each indoor unit 100. The refrigerant is molded and guided into the first heat exchanger 120 to flow.

Therefore, the refrigerant flowing along the refrigerant pipe 300 flows into the outdoor unit 200 to be guided by the cooling water supply branch pipe 422 to exchange heat with the cooling water flowing, and the heat exchanged refrigerant is a refrigerant pipe 300. It flows along the flow inside the first heat exchanger 120, heat exchange with the air of the space where the indoor unit 100 is installed to harmonize the interior space.

In addition, the coolant that is heat-exchanged with the refrigerant that is a working fluid inside the outdoor unit 200 is guided by the coolant recovery branch pipe 442 and flows into the internal space of the cooling tower 400 along the coolant recovery pipe 440. The coolant forms one cycle.

Hereinafter, the outdoor unit of the multi-type air conditioner will be described with reference to the accompanying drawings. 5 is a perspective view showing the external appearance of a water-cooled air conditioner outdoor unit employing a preferred embodiment according to the present invention, Figure 6 is an internal configuration of a water-cooled air conditioner outdoor unit employing a preferred embodiment according to the present invention An exploded perspective view is shown.

An outdoor unit 200 connected to the indoor unit 100 is installed in the interior space of the air conditioning room A by the refrigerant pipe 300, and the outdoor unit 200 is formed in a cabinet shape that is generally formed in a substantially rectangular parallelepiped shape. The appearance will be formed by.

The cabinet 210 has a front panel 211 forming a front surface (as seen in FIG. 5), a left panel (212 of FIG. 6) forming a left side appearance, and a right panel 213 forming a right side appearance. The rear panel (214 of FIG. 6), which forms the rear exterior, the top panel 215, which forms the top exterior, and the base 216, which forms the bottom exterior, are fastened to each other.

Accordingly, the cabinet 210 forms a predetermined internal space, and a plurality of components are installed in the internal space to condition air in a space for air conditioning.

The front panel 211 forming the front appearance of the cabinet 210 is provided with a plurality of service panels 211 'so that service personnel can easily perform a service operation. Since the service panel 211 ′ is easily attached to and detached from the service panel 211 ′, the service panel 211 ′ may be serviced for a plurality of components mounted in the internal space of the cabinet 210 without removing the front panel 211.

In addition, the front panel 211 and the rear panel 214 is formed to correspond to each other, so that the front panel 211 and the rear panel 214 is formed to be used interchangeably, the left panel 212 and the right panel 213 is also formed so as to be compatible with each other and can be used interchangeably.

As such, as the front panel 211 and the rear panel 214 and the left panel 212 and the right panel 213 are molded in a shape corresponding to each other, the assembly of the cabinet 210 is improved, and each panel The ease of manufacture increases the productivity of the product.

The base 216, which forms an outer appearance of the lower surface of the cabinet 210, is formed into a rectangular plate shape having a predetermined thickness, and the base support portion that is long in the horizontal direction is formed on the front and rear ends of the lower surface of the base 216. 216 'is molded.

A fork hole (not shown) is formed in the base support portion 216 'to allow the fork of the forklift to pass therethrough, and the bottom surface of the base 216 is predetermined from the bottom surface by the base support portion 216'. While spaced apart from each other, the outdoor unit 200 is easily moved and moved.

On the other hand, each panel forming the cabinet 210 is formed into a rectangular plate shape having a predetermined thickness, each panel is supported while being fastened to the frame 220. The frame 220 is a vertical frame 222 extending upward from each corner of the upper surface of the base 216 and the horizontal frame is fastened to the upper end of the vertical frame 222 to connect the upper end of the vertical frame 222 224.

The vertical frame 222 has a predetermined thickness and is molded into a shape of a long rectangular plate in the longitudinal direction is formed to be bent in a direction corresponding to each corner. As such, the inner surface of each panel is coupled to the outer surface of the vertical frame 222 that is bent in a direction corresponding to each corner is formed to form the cabinet 210, thereby forming the internal space of the cabinet 210. .

The horizontal frame 224 is fastened and fixed to an upper end of the vertical frame 222. The horizontal frame 224 has a predetermined thickness and is molded into a long rectangular plate shape in the horizontal direction, and is formed to be bent downward on the outer surface at the upper end of the vertical frame 222. The inner surface of the bent surface of the horizontal frame 224 is fastened and mounted while contacting the outer surface of the vertical frame 222.

The upper surface of the base 216 is equipped with a second heat exchanger 230 in which a refrigerant, which is a working fluid, heat exchanges with the cooling water. The second heat exchanger 230 is formed in the shape of a rectangular parallelepiped that is long in the longitudinal direction as a whole to form a predetermined space therein. In the inner space of the second heat exchanger 230, a plurality of thin plates are provided at predetermined intervals to form a space between the thin plates and the thin plates. In this space, the refrigerant and the coolant flow.

That is, when it is assumed that the refrigerant, which is the working fluid, flows from the upper side to the lower side in the space formed in front of the plurality of thin plates provided in the second heat exchanger 230, the refrigerant flows. In the next space, the cooling water flows from below to upward, and in the next space, the refrigerant flows from above to downward. Therefore, the coolant and the coolant exchange heat with each other by the heat transferred by the thin plate while the coolant and the coolant flow in the opposite directions.

The coolant supply part 231, which is a passage through which the coolant is supplied to the inner space of the second heat exchanger 230, is formed at the lower left front portion of the second heat exchanger 230 to protrude forward.

The cooling water supply unit 231 is formed into a circular pipe shape having a predetermined diameter, and is formed such that an inner space communicates with an inner space of the second heat exchanger 230. In other words, the upper side of the cooling water supply unit 231, the cooling water that is heat-exchanged with the refrigerant while flowing upward in the inner space of the second heat exchanger 230 in the upper upper end of the second heat exchanger 230 of the second heat exchanger 230. The coolant recovery part 232, which is a passage flowing to the outside, is molded. The coolant recovery unit 232 is molded in a shape corresponding to the coolant supply unit 231.

The other end of the cooling water supply unit 231 is connected to the cooling water supply branch pipe 422 to receive the cooling water from the cooling tower 400. That is, the cooling water flows from the cooling tower 400 to the cooling water supply unit 231 through the cooling water supply branch pipe 422 through the cooling water supply pipe 420 and to the internal space of the second heat exchanger 230.

The other end of the coolant recovery unit 232 is connected to the coolant recovery branch pipe 442 to recover the heat exchanged coolant to the cooling tower 400. That is, the coolant heat-exchanged with the refrigerant flows to the outside of the second heat exchanger 230 through the coolant recovery unit 232 and passes through the coolant recovery branch pipe 442 connected to the coolant recovery unit 232. The cooling tower 400 is recovered to the cooling tower 400 through the cooling water recovery pipe 440. The recovered cooling water is cooled again in the cooling tower 400 and supplied to the internal space of the second heat exchanger 230.

The second heat exchanger 230, which is shaped as a plate heat exchanger, is mounted to the top surface of the base 216 by a mounting bracket 235. The mounting bracket 235 is formed into a rectangular plate shape having a predetermined thickness, and the center portion is formed to be recessed upward, the left end is bent to the left side, and the right end is bent to the right side, and the base 216 is bent. It is fastened and fixed while contacting the upper surface of it.

The central portion of the mounting bracket 235 is fastened and fitted to the bottom surface of the second heat exchanger 230. That is, when the bent bottom surface of the mounting bracket 235 is fastened while contacting the top surface of the base 216, the bottom surface of the second heat exchanger 230 recessed upward is formed in the center of the mounting bracket 235. By fastening to fit, the second heat exchanger 230 is mounted on the upper surface of the base 216.

An auxiliary bracket 236 is provided on the right side (see FIG. 5) of the second heat exchanger 230. The auxiliary bracket 236 is formed into a long rectangular plate shape in the longitudinal direction, the center portion is formed to be recessed forward, the left end is formed to be bent to the left side, the right end to the right side.

The right end portion of the front bracket 237 supporting the second heat exchanger 230 from the front side is fastened to the left end bending surface of the auxiliary bracket 236, and the rear end supporting the second heat exchanger 230 from the rear side. The right end of the bracket 238 is fastened. As such, the second heat exchanger 230 is mounted to the base 216 while being fastened with a plurality of brackets.

The refrigerant inlet 233, which is a passage through which the refrigerant, which is a working fluid, flows into the internal space of the second heat exchanger 230, is formed at the upper right side of the second heat exchanger 230. The lower side of the second heat exchanger 230, that is, the lower right front portion of the second heat exchanger 230, is a passage through which the refrigerant introduced through the refrigerant inlet 233 exchanges heat with the cooling water and then flows out of the second heat exchanger 230. The coolant outlet 234 is molded.

Accordingly, the front surface of the second heat exchanger 230 is provided with a coolant supply unit 231 which is a passage through which the coolant is supplied and a coolant recovery unit 232 which is a passage through which the coolant is recovered, and a refrigerant inlet through which the refrigerant is introduced. A portion 233 and a refrigerant outlet portion 234 through which the refrigerant flows are provided.

The coolant supply unit 231 is formed to communicate with the coolant supply branch pipe 422, and the coolant recovery unit 232 is formed to communicate with the coolant recovery branch pipe 442. In addition, the refrigerant inlet 233 is connected to one port of the refrigerant control valve 270, which will be described later, and the refrigerant outlet 234 is a pipe in which the outdoor solenoid valve 281, which will be described later, is installed; Molded to connect.

The cooling water supply branch pipe 422 fastened to be connected to the other end of the cooling water supply unit 231 is equipped with a flow control means (240 of FIG. 6) to be described later. The flow rate control means 240 plays a role of controlling the flow rate of the coolant supplied to the coolant supply branch pipe 422 flows to the coolant supply unit 231. The flow rate control means 240 is equipped with a coolant temperature sensor 242 for detecting the temperature of the coolant.

The control box 250 is provided on the rear side of the front panel 211 forming the front appearance of the second heat exchanger 230. The control box 250 is molded into a rectangular parallelepiped shape having a predetermined space, and is molded into a shape in which the front face is opened. The interior space of the control box 250 is equipped with a plurality of electrical components to control the operation of the air conditioner.

An open front surface of the control box 250 is mounted with a control box cover 252 that is molded into a square plate shape having a predetermined thickness to selectively open and close the front surface of the control box 250.

The compressor 260 is mounted on the rear side of the control box 250. The compressor 260 is provided with a plurality, it is molded into a cylindrical shape having a predetermined diameter. The compressor 260 is responsible for compressing the refrigerant to be a gaseous state of high temperature and high pressure, and typically a scroll compressor having low noise and excellent efficiency is used.

The compressor 260 is composed of a constant speed compressor 261 for constant speed operation and an inverter compressor 262 which is a variable speed heat pump, and is disposed between the constant speed compressor 261 and the inverter compressor 262. The oil equalizing pipe 263 is mounted to be formed so that the constant speed compressor 261 and the inverter compressor 262 communicate with each other.

When the oil supply pipe 263 is insufficient oil supply in any one compressor 260, the oil is supplemented from the other compressor 260 through the bacteria oil pipe 263, the burner of the compressor 260 due to the oil shortage Will be prevented.

The constant speed compressor 261 performs constant speed operation regardless of the load capacity, and the inverter compressor 262 is shifted at a different speed by adjusting the rotation speed according to the load capacity. That is, when the temperature difference between the indoor space and the outdoor space for air conditioning is small, or when the air capacity is required for a few indoor spaces and the load capacity is small, the inverter compressor 262 is operated first, and the load capacity gradually increases. The constant speed compressor 261 starts to operate when only the inverter compressor 262 cannot handle it.

An accumulator 264 is provided at the rear of the compressor 260. The accumulator 264 filters the refrigerant in the liquid state and plays a role of allowing only the refrigerant in the gas state to flow into the compressor 260.

As such, the filtering of the refrigerant in the liquid state by the accumulator 264 does not evaporate to the gas among the refrigerant flowing from the indoor unit 100, and the refrigerant remaining in the liquid state is transferred to the internal space of the compressor 260. When introduced, the load is increased on the compressor 260 which forms the refrigerant in a gaseous state of high temperature and high pressure, thereby damaging the compressor 260, thereby preventing damage to the compressor 260.

Of the refrigerant flowing into the accumulator 264 inside the accumulator 264, the refrigerant that is not evaporated and remains in the liquid state is stored in the lower portion of the accumulator 264 because it is relatively heavier than the refrigerant in the gas state. Only the gaseous refrigerant which is located at the top flows to the compressor 260.

Hereinafter, a preferred embodiment will be described in more detail with reference to FIGS. 6 and 7. 6 is a block diagram showing the configuration of an outdoor unit 200 of a water-cooled air conditioner employing a preferred embodiment of the present invention, Figure 7 is a water-cooled air conditioner of the preferred embodiment according to the present invention is adopted A partial schematic diagram showing a state where the flow rate control means, which is a main component, is mounted is shown.

Looking at the internal configuration of the outdoor unit 200 in more detail with reference to Figure 6, the outlet side of the compressor 260 is compressed to a high temperature and high pressure in the internal space of the compressor 260 to the refrigerant discharged to the outside of the compressor 260 Included is an oil separator 265 for separating oil discharged simultaneously with the refrigerant is mounted. The oil separator 265 is molded into a cylindrical shape having a predetermined diameter and height.

The oil separator 265 is provided with an oil return pipe 266 for recovering the oil separated from the refrigerant in the internal space of the oil separator 265 to the internal space of the compressor 260. One end of the oil return pipe 266 is formed to communicate with the internal space of the oil separator 265, and the other end is formed to communicate with the internal space of the compressor 260.

That is, in order to cool the frictional heat generated when the compressor 260 is driven, oil is flowed into the compressor 260, and the oil flowing into the internal space of the compressor 260 is an internal space of the compressor 260. In the refrigerant is compressed to high temperature and high pressure is discharged to the outside of the compressor 260. The oil contained in the refrigerant and discharged to the outside of the compressor 260 is separated from the oil separator 265 and returned to the compressor 260 through the oil recovery pipe 266.

An oil separator check valve 267 is further provided at the outlet side of the oil separator 265 to prevent the backflow of the refrigerant. The oil separator check valve 267 is provided to prevent the refrigerant compressed back into the internal space of the compressor 260 which is not operated when only one of the constant speed compressor 261 or the inverter compressor 262 is operated. .

The oil separator 265 is shaped to communicate with the refrigerant control valve 270 by piping. The refrigerant control valve 270 is used to switch the flow direction of the refrigerant in accordance with the operation mode of the water-cooled air conditioner is used by the four-way valve, each port provided in the refrigerant control valve 270 One of which is in communication with the oil separator 265, each of the other port is formed to be connected by the pipe with the first heat exchanger 120, the second heat exchanger 230, the accumulator 264.

The oil separator 265 is provided with a hot gas pipe 268 that allows a part of the refrigerant flowing into the main control valve 270 to be directly introduced into the accumulator 264.

When the hot gas pipe 268 needs to increase the low pressure refrigerant pressure flowing into the accumulator 264 during the operation of the water-cooled air conditioner, the high pressure refrigerant discharged from the compressor 260 is directly transferred to the accumulator 264. It is provided to be supplied, such a hot gas pipe 268 is equipped with a hot gas valve 269 as a bypass valve to selectively open and close the hot gas pipe 268.

One end of a pipe formed to connect one of the ports of the refrigerant control valve 270 and the second heat exchanger 230 is the refrigerant passage through which the refrigerant flows into the internal space of the second heat exchanger 230. The refrigerant outlet part 234, which is connected to the inlet part 233 and passes through the inside of the second heat exchanger 230 through the refrigerant inlet part 233, is a passage through which the refrigerant that exchanges heat with the cooling water flows out. It is molded to be connected by the heat exchanger 120 and the pipe.

An outdoor check valve 280 is mounted on a pipe formed to connect the refrigerant outlet 234 and the first heat exchanger 120, and an outdoor solenoid valve 281 is provided at one side of the outdoor check valve 280. Is mounted.

That is, the outdoor check valve 280 is mounted on a pipe formed to connect the refrigerant outlet part 234 and the first heat exchanger 120, and the refrigerant outlet part 234 and the outdoor check valve 280. The outdoor solenoid valve 281 is mounted on a pipe branched from a pipe formed therebetween. The pipe on which the outdoor solenoid valve 281 is mounted is again laminated to a pipe that is shaped to connect the outdoor check valve 280 and the first heat exchanger 120.

As such, the refrigerant flowing through the refrigerant outlet 234 by the pipe to be formed flows through the outdoor check valve 280 to the first heat exchanger 120, and the first heat exchanger 120. The refrigerant flowing from the refrigerant to the refrigerant outlet 234 flows through the outdoor solenoid valve 281 to the internal space of the second heat exchanger 230.

A subcooler 282 for supercooling a refrigerant is provided in a pipe between the outdoor check valve 280 and the first heat exchanger 120. The subcooler 282 is a means for subcooling the refrigerant heat-exchanged in the first heat exchanger 120 and the second heat exchanger 230, and the subcooler 282 is formed in a double tube shape.

Hereinafter, a state in which the flow control means 240 is mounted on the second heat exchanger 230 will be described with reference to FIG. 7.

On the front surface of the second heat exchanger 230, the coolant supply unit 231, which is a passage through which coolant is supplied, the coolant recovery unit 232, which is a passage through which coolant is recovered, and the coolant inlet unit, which is a passage through which a coolant is introduced ( 233 and the coolant outlet 234 which is a passage through which the coolant flows out are formed.

Cooling water cooled in the cooling tower 400 is formed to be connected to the cooling tower 400, it is flowed while being guided by the cooling water supply pipe 420 is installed along the outer wall of the building. The coolant flowing while being guided by the coolant supply pipe 420 is guided by the coolant supply branch pipe 422 branched from the coolant supply pipe 420 and supplied to each space where the water-cooled air conditioner is installed.

As the cooling water supply unit 231 is coupled to an end of the cooling water supply branch pipe 422, the cooling water guided and supplied by the cooling water supply branch pipe 422 passes through the cooling water supply unit 231, and thus, It flows into the interior space.

Flow rate control means 240 for controlling the flow rate of the cooling water is mounted at the end of the cooling water supply unit 231 side of the cooling water supply branch pipe (422). The flow rate control unit 240 controls the amount of heat exchange of the refrigerant heat exchanged in the internal space of the second heat exchanger 230 by controlling the supply amount of the cooling water supplied to the internal space of the second heat exchanger 230.

That is, when the flow rate (supply amount) of the cooling water is controlled, the refrigerant is heat-exchanged in the internal space of the second heat exchanger 230 so as to meet the load capacity required in the indoor space in which the first heat exchanger 120 is installed. It becomes possible, and it becomes possible to supply the heat exchanged refrigerant | coolant to the 1st heat exchanger 120 suitably according to the load capacity requested | required in an indoor space.

In other words, if more air conditioning is required in the indoor space where the first heat exchanger 120 is installed, the flow rate control means 240 may provide a greater amount of cooling water to the second heat exchanger 230. By controlling the flow to the internal space to form a lower temperature through the heat exchange a lot of refrigerant in the internal space of the second heat exchanger 230 to flow a low-temperature refrigerant to the first heat exchanger (120).

In addition, if less air conditioning is required in the indoor space in which the first heat exchanger 120 is installed, the flow rate control means 240 has a smaller amount of cooling water inside the second heat exchanger 230. By controlling the flow to the space, the refrigerant is formed at a suitable temperature through a suitable heat exchange in the internal space of the second heat exchanger 230 to flow the refrigerant of a suitable temperature required in the indoor space to the first heat exchanger (120). .

In the embodiment of the present invention, for example, the flow control means 240 is formed into a flow control valve.

The flow control valve is mounted on the cooling water supply branch pipe 422 to control the opening degree of the valve using an electrical signal to control the flow rate of the cooling water flowing in the cooling water supply branch pipe 422.

Therefore, when the opening degree of the flow control valve is controlled, the flow rate of the cooling water supplied to the internal space of the second heat exchanger 230 is controlled to exchange heat with the cooling water flowing in the internal space of the second heat exchanger 230. The degree of heat exchange of the refrigerant to be controlled is controlled.

Inside the flow control valve is mounted a coolant temperature sensor 242 for detecting the temperature of the coolant flowing through the flow control valve. The coolant temperature sensor 242 is able to detect whether the coolant flows by sensing the temperature of the coolant flowing through the flow control valve, and calculates the flow amount of the coolant suitable for the load capacity required in the indoor space. Provide data.

That is, the cooling water flowing from the cooling tower 400 flows to the flow control valve, and a predetermined temperature change occurs. Due to the temperature change, the cooling water temperature of the cooling tower 400 and the temperature detected by the cooling water temperature sensor 242 exhibit a predetermined difference.

When the flow of the cooling water is not smooth in the internal space of the second heat exchanger 230, the temperature of the cooling water is reduced as the heat exchange between the refrigerant and the cooling water flowing in the internal space of the second heat exchanger 230 is not smooth. Will rise.

In other words, while the high temperature refrigerant continuously flows through the internal space of the second heat exchanger 230, the high temperature refrigerant continuously exchanges heat with the cooling water of the internal space of the second heat exchanger 230. Will change the temperature. At this time, when the flow of the cooling water is not smooth, the flow rate of the cooling water is slowed down, so that the cooling water is continuously heat exchanged with the refrigerant, thereby increasing the temperature of the cooling water.

Therefore, when it is detected that the temperature of the coolant flowing in the inner space of the second heat exchanger 230 is raised by the coolant temperature sensor 242, the coolant flowing in the inner space of the second heat exchanger 230 is detected. You will notice that the flow is not smooth.

In this way, if it is recognized that the flow of the coolant is not smooth, it can generate an abnormal signal or stop the operation so that the user can recognize that the flow of the coolant is not smooth, thereby preventing damage to the air conditioner in advance. Done.

As such, by detecting the flow of the coolant flowing to the flow control valve by the temperature difference between the coolant temperature of the cooling tower 400 and the temperature detected by the coolant temperature sensor 242 in the internal space of the second heat exchanger 230. By identifying problems such as freezing, it is possible to prevent damage to the air conditioner in advance.

In addition, the flow rate of the coolant is controlled by the temperature of the coolant detected by the coolant temperature sensor 242.

When the air conditioner is operated in the cooling mode, if the load capacity of the air conditioner is reduced by 50%, the flow rate (supply amount) of the cooling water flowing into the internal space of the second heat exchanger 230 is controlled to be reduced by 50%. By controlling the degree of heat exchange of the refrigerant to be exchanged with the heat supply to the internal space of the second heat exchanger 230 in the amount of cooling water suitable for the load capacity of the air conditioner.

Hereinafter, the operation of the water-cooled air conditioner according to the present invention will be described with reference to FIG. 6.

First, referring to the operation of the water-cooled air conditioner when the water-cooled air conditioner is operated in the cooling mode, the user applies external power to the air conditioner in order to use the water-cooled air conditioner. When external power is applied to the air conditioner, power is applied to the control box 250, and power is applied to a plurality of electrical components mounted in the interior space of the control box 250 by the applied power.

When power is applied to the electric component mounted in the inner space of the control box 250, power is also applied to the indoor unit 100 and the outdoor unit 200. When power is applied to the outdoor unit 200, the compressor 260 is operated to compress the refrigerant to high temperature and high pressure.

The refrigerant compressed to high temperature and high pressure in the internal space of the compressor 260 is separated from the oil while passing through the oil separator 265 and flows to the refrigerant control valve 270, and the oil to be separated is the oil recovery pipe 266. ) Is recovered to the internal space of the compressor 260 again.

The refrigerant flowing into the refrigerant control valve 270 is guided by a pipe formed to communicate with one port of the refrigerant control valve 270, and the refrigerant inlet 233 is formed on the front surface of the second heat exchanger 230. ) Flows into the inner space of the second heat exchanger (230).

The refrigerant flowing into the inner space of the second heat exchanger 230 through the refrigerant inlet 233 flows downward to exchange heat with the cooling water, and the refrigerant exchanged through the refrigerant outlet 234 is second to the second refrigerant. It flows out of the heat exchanger 230. The refrigerant flowing out of the second heat exchanger 230 through the refrigerant outlet 234 flows through the outdoor check valve 280 to the subcooler 284.

The refrigerant flowing into the subcooler 284 is subcooled while passing through the subcooler 284, and the supercooled refrigerant flows along the refrigerant pipe and is mounted inside each indoor unit 100. Will flow). The refrigerant flowing into the first heat exchanger 120 exchanges heat with the air in the indoor space in which the indoor unit 100 is installed, and the heat exchanged refrigerant flows into the outdoor unit 200 along the refrigerant pipe to form the refrigerant. It is guided by a pipe connected to communicate with one port of the control valve 270 and flows to the refrigerant control valve 270.

The refrigerant flowing into the refrigerant control valve 270 flows into the interior space of the accumulator 264 through another port of the refrigerant control valve 270. In the refrigerant flowing into the accumulator 264, only the gaseous refrigerant flows into the internal space of the compressor 260, and the liquid refrigerant remains in the accumulator 264.

The refrigerant flowing into the internal space of the compressor 260 is compressed to high temperature and high pressure again to form a cooling cycle, and the refrigerant is repeatedly flown along the cooling cycle to cool the indoor space.

The flow of the refrigerant according to the heating operation of the water-cooled air conditioner configured as described above flows in the opposite direction to the flow of the refrigerant according to the cooling operation to form a heating cycle, and the refrigerant is repeatedly flowed along the heating cycle while indoors. The space is heated.

Meanwhile, the cooling water cooled in the cooling tower 400 continuously flows regardless of the operation mode of the air conditioner. Looking at the flow of such cooling water, the cooling water cooled in the cooling tower 400 is guided by the cooling water supply pipe 420 flows.

The cooling water supply pipe 420 is installed while extending downward along the outer wall of the building, and the cooling water supply branch pipe 422 is branched from the cooling water supply pipe 420, the cooling water is the outdoor unit 200 of the air conditioner It is guided by the cooling water supply branch pipe 422 to the space to be installed to flow.

The coolant flowing while being guided by the coolant supply branch pipe 422 passes through the flow rate control unit 240 and flows through the coolant supply unit 231 to the internal space of the second heat exchanger 230.

At this time, the cooling water flows into the internal space of the second heat exchanger 230 while controlling the flow rate control means 240 is controlled. By controlling the flow rate supplied to the internal space of the second heat exchanger 230 by the flow rate control means 240, the flow rate of the cooling water that is heat-exchanged with the refrigerant is controlled.

For example, if the water-cooled air conditioner operates in the cooling mode, assuming that the user sets the temperature of the indoor space to 10 ° C., the cooling water flows 100 liters. If the cooling water is only 50L flow, it is possible to maintain the temperature of the indoor space at 20 ℃.

That is, when the load capacity of the air conditioner is reduced to 50%, by controlling the flow rate (supply amount) of the cooling water to 50%, the cooling water suitable for the load capacity is flowed, and as the flow rate of the cooling water is controlled to 50%, the heat exchange with the cooling water The refrigerant is heat exchanged to a temperature suitable for the load capacity.

For example, if the water-cooled air conditioner is to operate in the heating mode, the user assumes that the coolant flows 100 liters with the temperature of the indoor space set at 20 ° C. When set, the coolant will flow 50 l to allow the coolant to flow best suited to the required load capacity.

The cooling water whose supply amount is controlled by the flow rate control means 240 flows from the lower side to the upper side of the inner space of the second heat exchanger 230. Cooling water that flows upward in the internal space of the second heat exchanger 230 and exchanges heat with the refrigerant is heat-exchanged to suit the load capacity of the air conditioner, and then the second heat exchanger (232) through the cooling water recovery unit 232. 230) to the outside.

The heat exchanged coolant flowing through the coolant recovery unit 232 is guided by the coolant recovery branch pipe 442 connected to the coolant recovery unit 232 and flows to the coolant recovery pipe 440. Cooling water flowing to the cooling water recovery pipe 440 is guided by the cooling water recovery pipe 440 and flows to the cooling tower 400. The cooling water flowing to the cooling tower 400 is cooled again and supplied to the second heat exchanger 230 at a constant pressure by the cooling water pump 460.

Hereinafter, a process of controlling the flow rate control means will be described.

When power is applied to the air conditioner, power is also applied to the coolant temperature sensor 242 provided in the flow control means 240. When power is applied to the coolant temperature sensor 242, the coolant temperature sensor 242 senses the temperature of the coolant passing through the coolant temperature sensor 242. That is, the temperature of the cooling water is sensed through the cooling water temperature sensing step in which the temperature of the cooling water flowing into the inner space of the second heat exchanger 230 is sensed.

The temperature of the coolant detected through the coolant temperature detection step is transmitted to a main microcomputer (not shown) provided in the indoor unit 100. When the temperature of the cooling water is sensed in the cooling water temperature sensing step, a flow rate sensing step of sensing the flow rate of the cooling water flowing into the internal space of the second heat exchanger 230 is performed.

The flow rate sensing step is to detect the flow rate of the cooling water flowing in the cooling tower 400 to the internal space of the second heat exchanger 230. The cooling water in which the flow rate is detected in the flow rate sensing step is the drifting control means 240 Will flow through).

Next, the load capacity sensing step of sensing the load capacity required for the indoor unit 100, that is, the air conditioner is performed. The load capacity of the air conditioner detected in the load capacity detection step becomes a reference to compare the temperature of the coolant detected in the coolant temperature detection step with the flow rate of the coolant detected in the flow rate detection step.

That is, all information detected or collected through each step is delivered to the main microcomputer (not shown), and the main microcomputer (not shown) that receives the information compares the respective information. The main microcomputer to compare the respective information to control the flow of the cooling water by controlling the operation of the flow control means 240 through the flow control step based on the compared information.

The main microcomputer (not shown) increases the flow rate of the coolant flowing in the flow rate control means 240 to the internal space of the second heat exchanger 230 when the load capacity of the indoor unit detected in the load capacity detection step increases. The flow rate control means 240 is operated to reduce the flow rate of the coolant flowing into the internal space of the second heat exchanger 230.

The scope of the present invention is not limited to the above embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

In the water-cooled air conditioner employing the preferred embodiment according to the present invention as described above is provided with a cooling water supply branch pipe for supplying the cooling water to the internal space of the outdoor heat exchanger, the cooling water supply branch pipe is equipped with a flow control means The flow rate (supply amount) of the cooling water is controlled.

By controlling the flow rate of the cooling water supplied to the internal space of the second heat exchanger by the flow rate control means, it is possible to supply the amount of cooling water most suitable for the load capacity required from the air conditioner.

When the amount of cooling water that is most suitable for the load capacity of the air conditioner can be supplied, the supply of unnecessary cooling water is reduced, and when the supply of unnecessary cooling water is reduced, the load of the cooling water pump required for the supply of cooling water is reduced. It is effective to enable the operation of a more stable water-cooled air conditioner.

As such, when only the coolant that is most suitable for the load capacity is flowed, waste of unnecessary energy due to continuous flow of the coolant is reduced, and maintenance costs for operating the air conditioner are reduced due to waste of unnecessary energy.

In addition, when a plurality of parts for flowing the cooling water are operated in accordance with the required load capacity, there is an effect of improving the reliability of the product.

The temperature of the coolant is sensed by the coolant temperature sensor mounted on the flow control means, so that the flow of the coolant can be checked. The freezing and clogging of the second heat exchanger can be confirmed. It is effective in preventing damage to the air conditioner by preventing the phenomenon.

Claims (7)

A first heat exchanger in which air in the indoor space for air conditioning is heat-exchanged; A second heat exchanger communicating with the first heat exchanger and a pipe, the second heat exchanger exchanging a refrigerant and cooling water; A coolant supply unit formed in the second heat exchanger and configured to be a passage through which coolant is supplied to an inner space of the second heat exchanger; A cooling water supply branch pipe coupled to the cooling water supply unit to guide the flow of the cooling water; Flow control means provided on one side of the cooling water supply branch pipe to control the supply amount of the cooling water supplied into the second heat exchanger according to the load capacity of the indoor space; A coolant temperature sensor provided in the flow control means and configured to sense a temperature of the coolant; And A main microcomputer for controlling the flow rate control means, The main microcomputer, Calculating the flow amount of the coolant flowing into the internal space of the second heat exchanger based on the temperature sensed by the coolant temperature sensor, When the load capacity of the indoor space is increased, the flow rate control means controls to increase the supply amount of cooling water, And when the load capacity of the indoor space decreases, the flow rate control means controls the supply amount of the cooling water to be reduced. The method of claim 1, The flow rate control means is formed by the solenoid valve, the water-cooled air conditioner, characterized in that configured to enable the control of the opening degree of the valve. The method of claim 1, The main microcomputer, If it is recognized that the flow of the cooling water is not smooth, the water-cooled air conditioner, characterized in that it generates an abnormal signal or controls to stop the operation. The method of claim 1, The flow rate control means is a water-cooled air conditioner, characterized in that for controlling the flow rate of the cooling water in accordance with the temperature and the indoor load capacity of the cooling water supplied into the second heat exchanger. A coolant temperature sensing step of sensing a temperature of the coolant flowing into the inner space of the second heat exchanger; A flow rate sensing step of sensing a flow rate of the coolant flowing into the internal space of the second heat exchanger using the temperature detected in the coolant temperature sensing step; A load capacity detecting step of detecting a load capacity required for the air conditioner; And A comparison step of comparing the temperature of the coolant detected in the coolant temperature detection step with the load capacity detected in the load capacity detection step by determining a flow rate of the coolant detected in the flow rate detection step, According to the comparison result of the comparing step, when the amount of cooling water is small to cover the load capacity, the supply amount of cooling water is increased by a flow control means, and when the amount of cooling water is large to cover the load capacity, A control method of a water-cooled air conditioner, characterized in that the supply amount of the cooling water is reduced by the flow rate control means. 6. The method of claim 5, When the load capacity is increased, the flow rate control means is operated to increase the flow rate of the cooling water flowing into the second heat exchanger, And when the load capacity decreases, the flow rate control means is operated to reduce the flow rate of the cooling water. delete

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