KR101135809B1 - Water Cooling Type Air Conditioner - Google Patents

Abstract

The present invention relates to a water-cooled air conditioner having a discharge means for selectively discharging water in a second heat exchanger on one side of a second heat exchanger configured to circulate heat by circulating a refrigerant and water therein.

The water-cooled air conditioner according to the present invention includes a first heat exchanger (120) for exchanging indoor air with a refrigerant, a compressor (210) for compressing a refrigerant, and a refrigerant for exchanging the refrigerant compressed by the compressor (210) with water. Including a plate-shaped second heat exchanger 290, one side of the second heat exchanger 290, an inlet passage for guiding water through the cooling tower (C) to the second heat exchanger (290) ( 202 ′) and a discharge means 320 for forcibly discharging water inside the second heat exchanger 290 to the outside. And, one side of the outer surface of the second heat exchanger 290, it characterized in that the drain hole 330 is bored to the inside so that the water inside the second heat exchanger 290 is drained to the outside. According to this configuration, there is an advantage that the damage of the second heat exchanger due to freezing is prevented in advance.

Water Cooled, Air Conditioner, Plate Heat Exchanger, Freezing, Discharge Means

Description

Water Cooling Type Air Conditioner {Water Cooling Type Air Conditioner}

1 is a refrigeration cycle diagram of a water-cooled air conditioner according to the prior art.

2 is a bird's eye view showing a state in which a water-cooled air conditioner according to the present invention is installed in a building.

Figure 3 is a flow chart showing the flow of air and water inside the building when the integrated water-cooled air conditioner employing one embodiment of the present invention.

4 is a bird's eye view showing a state in which a multi-type water-cooled air conditioner employing another embodiment of the present invention is installed in a building.

Figure 5 is a perspective view showing the appearance of the outdoor side constituting the main portion in the water-cooled air conditioner according to the present invention.

Figure 6 is an exploded perspective view showing the internal configuration of the outdoor side constituting the main portion in the water-cooled air conditioner according to the present invention.

Figure 7 is an exploded perspective view showing the internal configuration of a second heat exchanger of one configuration of the water-cooled air conditioner according to the present invention.

8 is a block diagram showing the flow of refrigerant and water during the cooling operation of the water-cooled air conditioner according to the present invention.

9 is a block diagram showing the flow of the refrigerant and water during the heating operation of the water-cooled air conditioner according to the present invention.

10 is a block diagram showing a control method of a water-cooled air conditioner according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Indoor side 110. Indoor fan

120. First heat exchanger 130. Refrigerant pipe

132. Common liquid pipes 134. Common institutions

200. Outdoor side 202. Waterway

202 '. Inlet 202 ". Outlet

204. Top cover 204 '. Reinforcement beam

205. Front panel 206. Service panel

207. Rear Panel 208. Side Panel

208 '. Heat dissipation hole 209. Base fan

210. Compressor 212. Constant Speed Compressor

214. Inverter compressor 215. Refrigerant sprayer

216. Bacteria oil pipe 217. Compressor discharge temperature sensor

218. Oil Separator 219. Oil Recovery Tube

232. Check valves 240. 4-way valves

240 '. High pressure sensor 242. 4 inlet port

244. 4-way-1 exit port 246. 4-way 2 exit port

248. 4-way 3 exit port 250. Hot gas pipe

252. Hot gas valve 260. Supercooler

262. Outdoor liquid pipe 264. Reverse feed pipe

266. Supercooled expansion valve 270. Accumulator

272. Suction pipe temperature sensor 274. Low pressure sensor

280. Control box 282. Control cover

284. Radiator 290. Second heat exchanger

292. Water pipe 293. Water pipe

294. Refrigerant entry 295. Refrigerant entry

296. Coolant temperature sensor 298. Heat exchanger support

320. Discharge means 330. Drainage hole

340. Drain valve B. building

 C. Cooling tower D. duct

 H. Inlet R. Indoor space

 S. Confined space

The present invention relates to a water-cooled air conditioner, and more particularly, a discharge means for selectively discharging water in the second heat exchanger is provided at one side of the second heat exchanger that circulates the refrigerant and water to heat exchange therein. It relates to a water-cooled air conditioner is prevented from damage of the second heat exchanger.

In general, an air conditioner is a cooling / heating system that cools a room by a repetitive action of inhaling hot air in a room, exchanging heat with a low temperature refrigerant, and then discharging it into the room. A condenser, expansion valve, and evaporator that forms a series of refrigerant cycles.

In recent years, in order to improve the quality of life and meet the needs of customers, in addition to cooling and heating, air polluting and filtering indoor polluted air and making it into clean air and re-injecting it into the room. It has several additional functions such as re-dehumidification function.

An air conditioner is often installed outdoors (outdoor side or heat dissipation side), and is mainly installed inside a building (indoor side or endothermic side). The outdoor side is provided with a condenser (second heat exchanger) and a compressor, and the indoor side is provided with an evaporator (first heat exchanger).

The air conditioner can be divided into two types: a separate air conditioner in which the outdoor side and the indoor side are separately installed, and an integrated air conditioner in which the outdoor side and the indoor side are installed integrally. The trend is a favored trend.

In addition, a water-cooled air conditioner is preferred as an alternative for reducing power consumption excessively generated when the indoor air is harmonized, and active research and development is in progress.

The water-cooled air conditioner is designed to be cooled by water, unlike the general air conditioner's condenser (second heat exchanger) in which the refrigerant is air-cooled by outdoor air, so that water and refrigerant are not mixed in the second heat exchanger. It is made up.

Hereinafter, the configuration of a water-cooled air conditioner according to the prior art will be described with reference to the accompanying drawings.

1 is a partial cutaway view showing the configuration of a water-cooled air conditioner according to the prior art.

As shown in the figure, the water-cooled air conditioner is formed by the main body 10 having a vertically long rectangular parallelepiped shape, the compressor 10, the water-cooled condenser 12, the evaporator (not shown) inside the main body 10 And an expansion device (not shown) are connected to the refrigerant pipe (not shown) to form one closed circuit.

The water-cooled condenser 12 is configured to condense the refrigerant by receiving water from the outside, and has a cylindrical appearance in which the central part is rolled up spirally in a central portion.

In addition, the water inlet pipe 14 and the water outlet pipe 16 are connected to the right outer surface of the water-cooled condenser 12 so that the water can be drained through the water after being introduced into the inside.

Although not shown, the inlet pipe 14 and the outlet pipe 16 communicate with the interior of the cooling tower to guide the water circulation between the water-cooled condenser 12 and the cooling tower.

Accordingly, when water and the refrigerant flow in the water-cooled condenser 12 in a separated state from each other, the water-cooled condenser 12 may exchange heat with the water and the refrigerant.

The compressor 11 serves to compress the refrigerant into a gaseous state of high temperature and high pressure, and the inside thereof is in communication with the water-cooled condenser 12. Therefore, the refrigerant compressed by the compressor 11 is guided to the water-cooled condenser 12, and heat exchanges with water.

Since other components except for the configuration of the water-cooled condenser 12 is the same as the configuration of a general air-cooled air conditioner, a detailed description thereof will be omitted.

However, the water-cooled air conditioner having the above configuration has the following problems.

That is, as described above, the water-cooled condenser 12 flows without mixing water and refrigerant. Therefore, when the water-cooled air conditioner is not operated in winter, there is a problem in that water is kept frozen in the water-cooled condenser 12.

In addition, if the water freezes, even though the air conditioner is operated, heat exchange is not performed, so that harmony of the indoor air is impossible, resulting in a product complaint.

In addition, if the water-cooled condenser 12 is damaged due to freezing of water, there is a problem that a huge repair cost is generated.

Therefore, an object of the present invention is to solve the problems of the prior art as described above, the discharge to selectively discharge the water in the second heat exchanger on one side of the second heat exchanger to circulate heat exchange by the refrigerant and the water inside The present invention relates to a water-cooled air conditioner provided with means to prevent breakage of the second heat exchanger due to winter freezing.

Another object of the present invention is to provide a water-cooled air conditioner further comprising a cooling water temperature sensor on one side of the second heat exchanger so that the discharge means is interlocked with the cooling water temperature sensor so that the water inside the second heat exchanger is automatically discharged. Is in.

Still another object of the present invention is to provide a water-cooled air conditioner having a drainage hole communicating with an inside at one side of the second heat exchanger, and having a drainage valve at one side of the drainage hole, the drainage valve being configured to interlock with a coolant temperature sensor. It is in doing it.

The water-cooled air conditioner according to the present invention for achieving the above object, the first heat exchanger for heat-exchanging the indoor air with a refrigerant, a compressor for compressing the refrigerant, and a plate type for heat-exchanging the refrigerant compressed by the compressor with water And a second heat exchanger on the upper side, and on one side of the second heat exchanger, an inlet passage for guiding water passing through the cooling tower to the second heat exchanger and discharge means for forcibly discharging water inside the second heat exchanger to the outside. Characterized in that it is provided.

One side of the outer surface of the second heat exchanger is characterized in that it is provided with a drain hole which is drilled to communicate with the inside of the second heat exchanger to guide the water inside the second heat exchanger to drain to the outside.

The discharge means is characterized in that the pump is applied.

One side of the second heat exchanger, characterized in that the cooling water temperature sensor for measuring the temperature of the water passing through the inside of the second heat exchanger.

One side of the drain hole, characterized in that provided with a drain valve for selectively opening the drain hole when the water temperature inside the second heat exchanger is less than the set temperature.

The drain hole is characterized in that formed in the lower portion of the second heat exchanger.

The discharge means is characterized in that it is installed on at least one side of the inlet pipe and the outlet pipe for guiding the outflow / mouth of the water into / outside the second heat exchanger.

The coolant temperature sensor is characterized in that it is installed on one side of the outlet pipe.

The control method of a water-cooled air conditioner according to the present invention includes a water temperature measuring step of measuring a water temperature inside a second heat exchanger by a cooling water temperature sensor provided at one side of a second heat exchanger that exchanges water and a refrigerant; Comparing the water temperature measured by the sensor to the set temperature in the control unit and a step of draining the water inside the second heat exchanger to the outside in accordance with the difference between the measured temperature and the set temperature compared in the control unit Characterized in that configured.

The draining step is characterized in that the control unit is a process of opening the drain valve provided on one side of the drain hole when the measured temperature is less than the set temperature.

The draining step is characterized in that the process of draining the water inside the second heat exchanger by opening the drain hole provided on one side of the outer surface of the second heat exchanger.

The set temperature is characterized in that 0 ℃.

When the measured temperature is higher than the set temperature, the control unit is characterized in that for operating the compressor for compressing the refrigerant.

According to the present invention having such a configuration, there is an advantage that the damage of the second heat exchanger due to freezing is prevented in advance.

Hereinafter, exemplary embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

FIG. 2 is a bird's eye view showing a state in which a water-cooled air conditioner according to the present invention is installed in a building, and FIG. 3 shows a flow of air and water inside a building when an integrated water-cooled air conditioner employing an embodiment of the present invention is operated. A flow chart is shown.

As shown in these figures, the water-cooled air conditioner is installed in the closed space (S) formed on one side of the interior of the building (B). The sealed space (S) is sealed to the outside of the building (B), it is in communication with the indoor space (R) by the inlet (H) perforated in the ceiling it is possible to suck the indoor air.

The duct D is connected to the indoor space R to guide the air heat-exchanged by the water-cooled air conditioner to the room. That is, the water-cooled air conditioner is connected to the indoor side 100, which sucks the indoor air and heat-exchanges it, and then discharges it back to the indoor space R, and the indoor side 100 and the refrigerant pipe (reference numeral 130 in FIG. 4). And an outdoor side 200 for heat-exchanging the refrigerant introduced through the refrigerant pipe 130 with water, and the duct D communicates the indoor side 100 with the indoor space R. .

The outdoor side 200 includes a compressor 210 and an accumulator (reference numeral 270 of FIG. 6), a second heat exchanger 290, an outdoor solenoid valve (reference numeral 234 of FIG. 8, a linear expansion valve (LEV)), and the like. Is provided, the indoor side 100 is provided with a first heat exchanger 120 and an expansion valve (not shown).

Therefore, when the water-cooled air conditioner is operated, the air in the indoor space R is introduced into the ceiling through the inlet H, and the air flowing along the ceiling can be introduced into the interior 100. .

In order to circulate the indoor air, an indoor fan 110 generating air flow is provided inside the indoor side 100, and the first heat exchanger 120 is inclined under the indoor fan 110.

The first heat exchanger 120 heats indoor air by using a refrigerant passing through the inside, and is connected to the second heat exchanger 290 and the refrigerant pipe 130 which will be described in detail below.

The coolant pipe 130 allows the coolant to circulate between the indoor side 100 and the outdoor side 200, and a single liquid refrigerant flows between the outdoor side 200 and the indoor side 100. The common liquid pipe (132 of FIG. 8) which is piping is provided, and the common engine (134 of FIG. 8) which is a single pipe through which gas refrigerant flows.

That is, the common liquid pipe 132 is connected so that the second heat exchanger 290 and the first heat exchanger 120 communicate with each other, and the common engine 134 is connected to the compressor 210 and the first heat exchanger 120. Connected to communicate.

The indoor side 100 has a difference in the position of the water-cooled air conditioner is installed as an integral or separate type, but its internal configuration is not significantly different when compared with the configuration of a general indoor unit (not shown), so the detailed description will be omitted. do.

The outdoor side 200 is provided below the indoor side 100. The outdoor side 200 is a main component of the present invention, a compressor 210 for compressing a refrigerant at a high temperature and high pressure therein, and a refrigerant introduced from the compressor 210 and a cooling tower (C) installed on the roof of a building (B). A second heat exchanger 290 is provided to heat exchange the water and the refrigerant by allowing the introduced water to pass therethrough.

That is, the second heat exchanger 290 is provided with a water channel 202 in communication with the inside of the cooling tower (C), the water channel 202 is the water sent from the cooling tower (C) to the second heat exchanger (290). An inlet 202 ′ for guiding the inflow, and an outlet 202 ″ for guiding the water exchanged with the refrigerant through the second heat exchanger 290 to be introduced into the cooling tower C again. It is composed.

Hereinafter, with reference to Figure 4 will be described a state in which the water-cooled air conditioner installed in a multi-type. 4 is a bird's-eye view showing a state in which a multi-type water-cooled air conditioner employing another embodiment of the present invention is installed in a building.

As shown in the figure, when the water-cooled air conditioner is applied in a multi-type, the indoor side 100 and the outdoor side 200 are separated from each other and connected by a refrigerant pipe 130. That is, the indoor side 100 is installed on the ceiling of the indoor space (R), the outdoor side 200 is installed inside the sealed space (S), the outdoor side 200 and the indoor side (100) Is connected by the refrigerant pipe 130, the refrigerant circulates to heat exchange the air in the indoor space (R).

Although not shown in the interior 100, a first heat exchanger is provided to allow the indoor air to exchange heat with the refrigerant, such that the air heat-exchanged by the first heat exchanger is discharged back to the indoor space R. It is common that the fan 110 is further provided.

In addition, similar to the integrated water-cooled air conditioner described above, the multi-type water-cooled air conditioner includes a second heat exchanger 290 for exchanging water and refrigerant with each other, and the circulation of the refrigerant and water passing through the inside of the second heat exchanger 290. Since is the same regardless of the multi / integrated type, a detailed description of the other components will be omitted.

Hereinafter, the configuration of the outdoor side 200 will be described in detail with reference to the accompanying drawings.

Figure 5 is a perspective view showing the appearance of the outdoor side constituting the main portion in the water-cooled air conditioner according to the present invention, Figure 6 is an internal configuration of the outdoor side constituting the main portion in the water-cooled air conditioner according to the present invention. An exploded perspective view is shown.

And, Figure 7 is an exploded perspective view showing the internal configuration of the second heat exchanger which is one configuration of the water-cooled air conditioner according to the present invention, Figure 8 is a water-cooled air conditioner according to the present invention of the refrigerant and water in the cooling operation A schematic diagram showing the flow is shown.

As shown in these figures, the outdoor side 200 has a vertically long rectangular parallelepiped shape, a top cover 204 partitioning the indoor side 100 and the outdoor side 200, and a front and rear exteriors. The exterior is formed by the front panel 205 and the rear panel 207, the side panel 208 that forms the left and right sides, and the base fan 209 that supports a plurality of components, respectively.

The top cover 204 is located at the upper end of the outdoor side 200 to prevent air passing through the interior side 100 from entering the outdoor side 200, and has no rectangular shape in which no hole is formed. Has

In addition, the top cover 204 also performs a role of supporting the indoor side 100 provided on the upper side. Therefore, a reinforcing beam 204 ′ is further provided at a lower edge of the top cover 204 to reinforce the strength of the top cover 204.

The front panel 205 is installed upright on the lower end of the top cover 204. The service panel 206 is formed at the center left side and the lower left / right side of the front panel 205. The service panel 206 is to allow the inside of the outdoor side 200 to be opened to the outside when an error occurs in the components installed on the outdoor side 200, the service is required, the remaining three surfaces except one side (slit ( slit) is processed.

Therefore, when the service panel 206 is rotated on the basis of the non-slit surface, the inside of the outdoor side 200 communicates with the outside to perform a service.

The front left and right ends of the front panel 205 are provided so that the front end of the side panel 208 is in contact, and the heat generated when the compressor 210 is operated on the upper side of the side panel 208 is the outdoor side. A plurality of heat dissipation holes 208 ′ cut out to be allowed to escape to the outside are punctured.

Although not shown, one side of the top cover 204, the front panel 205, the rear panel 207, and the side panel 208 includes the aforementioned common engine 134 and the common liquid pipe 132. It is obvious that a perforated connection hole may be formed so as to be connected by).

A base fan 209 is provided at the lower ends of the front panel 205, the rear panel 207, and the side panel 208. The base fan 209 supports the load of a plurality of parts, and the compressor 210 is provided at the center of the upper surface of the base fan 209.

The compressor 210 compresses the refrigerant to be high temperature and high pressure, and is provided at left and right sides, respectively. More specifically, the compressor 210 is installed on the right side of the constant speed compressor 212 for constant speed operation, and the variable speed heat pump (Variable Speed Heat Pump) is installed on the left side of the constant speed compressor 212, the variable speed It is configured to include an inverter compressor (214).

The refrigerant injector 215 is installed at the inlet side of the compressor 210. The refrigerant injector 215 prevents burnout by supplying a refrigerant when the compressor 210 is overheated according to an operating condition, and the refrigerant used here is a refrigerant discharged from the second heat exchanger 290. It is preferably configured to.

A constant oil compressor 214 is installed between the constant speed compressor 212 and the inverter compressor 214 so that the constant speed compressor 212 and the inverter compressor 214 communicate with each other. Therefore, when oil supply shortage occurs in one of the compressors 212 and 214, the compressor 210 is replenished from the other compressor to prevent the compressor 210 from being burned due to the flow rate shortage.

As the compressor 210, a low noise and excellent scroll compressor is used. In particular, the inverter compressor 214 is an inverter scroll compressor whose rotation speed is adjusted according to the load capacity.

Therefore, when the load applied to the compressor 210 is small, the inverter compressor 214 is operated first, and when the load capacity gradually increases and cannot be handled by the inverter compressor 214 only, the constant speed compressor 212 ) Is activated.

The compressor discharge temperature sensor 217 and the oil separator 218 for measuring the temperature of the refrigerant discharged from the compressor 210 are provided at the outlet side of the compressor 210, respectively. The oil separator 218 filters the oil mixed in the refrigerant discharged from the compressor 210 to be recovered to the compressor 210.

That is, oil used to cool the frictional heat generated when the compressor 210 is driven is discharged to the outlet of the compressor 210 together with the refrigerant. The oil in the refrigerant is separated from the oil separator 218. By returning to the compressor 210 through the oil return pipe (219).

And the check valve 232 is further installed on the outlet side of the oil separator 218. The check valve 232 is configured to prevent the backflow of the refrigerant. That is, when only one of the constant speed compressor 212 or the inverter compressor 214 is operated, the compressed refrigerant is prevented from flowing back into the stationary compressor.

The oil separator 218 is configured to communicate with the four-way valve 240 by the pipe. The four-way valve 240 is arranged to change the flow direction of the refrigerant according to the cooling and heating operation, four inlet port 242, four one-way outlet port 244, four two-way outlet port 246 And a three-way three outlet port 248, each of which is an outlet of the compressor 210 (or an oil separator 218), an inlet of the compressor 210 (or an accumulator 270), and a second heat exchange. It is connected to the group 290 and the indoor side (100).

Therefore, the refrigerant discharged from the constant speed compressor 212 and the inverter compressor 214 is collected in one place, and then flows into the four-way valve 240, which is discharged from the compressor 210 at the inlet of the four-way valve 240. A high pressure sensor 240 'for checking the pressure of the refrigerant to be installed is installed.

On the other hand, a hot gas pipe (250.hot gas pipe) for allowing a portion of the refrigerant flowing into the four-way valve 240 from the oil separator 218 to the accumulator 270 to be described in detail below is It is installed through the directional valve 240.

When the hot gas pipe 250 needs to increase the pressure of the low pressure refrigerant flowing into the accumulator 270 during operation of the water-cooled air conditioner, the high pressure refrigerant at the discharge port side of the compressor 210 is directly supplied to the inlet side of the compressor 210. In this way, the hot gas pipe 250 is provided with a hot gas valve 252 which is a bypass valve to open and close the pipe.

An overcooler 260 is formed at the right rear end of the upper surface of the base fan 209. The subcooler 260 is a subcooling means for further cooling the refrigerant exchanged in the second heat exchanger 290 to be described in detail below, and the outdoor liquid pipe 262 connected to the outlet side of the second heat exchanger 290. Is formed at any position.

The subcooler 260 is formed of a double tube. That is, the outdoor liquid pipe 262 is provided on the inside, and the reverse transfer pipe 264 is formed on the outside. Accordingly, the reverse transfer pipe 264 is branched from the outlet of the subcooler 260, and the reverse transfer pipe 264 is provided with a subcooled expansion valve 266 for cooling the refrigerant by expansion.

In this case, a part of the refrigerant discharged from the subcooler 260 is introduced into the reverse transfer pipe 264 and cooled while passing through the subcooling expansion valve 266, and the cooled refrigerant cools the subcooler 260. The reflux allows the coolant inside to cool further. The countercurrent refrigerant exiting the subcooler 260 is supplied to the accumulator 270 to be described later and circulated.

Meanwhile, a liquid pipe temperature sensor 263 is installed at the outlet of the subcooler 260 to measure the temperature of the refrigerant discharged from the outdoor side 200, and a subcooling inlet sensor 265 is provided at the outlet of the subcooling expansion valve 266. Is provided to measure the temperature of the reflux refrigerant flowing into the subcooler 260, the subcooling flow flowing through the backflow refrigerant discharged from the subcooler 260 is provided with a subcooling outlet sensor (267).

Therefore, the refrigerant passing through the second heat exchanger 290 flows through the center portion, and is configured such that the low temperature refrigerant expanded by an expansion valve (not shown) flows in the opposite direction to lower the temperature of the refrigerant.

An accumulator 270 is installed at the left side of the base fan 209, that is, at the left side of the inverter compressor 214. The accumulator 270 filters the liquid refrigerant so that only the gaseous refrigerant flows into the compressor 210.

That is, when the refrigerant remaining in the liquid phase is not directly evaporated into gas among the refrigerant flowing from the indoor side 100 directly in the compressor 210, the compressor 210 forms a refrigerant as a high-temperature, high-pressure gas state refrigerant. The load is increased to cause damage to the compressor 210.

Therefore, among the refrigerants introduced into the accumulator 270, the refrigerant that is not evaporated and remains in the liquid phase is stored in the lower part of the accumulator 270 because it is relatively heavier than the refrigerant in the gas phase, and only the gaseous refrigerant in the upper portion is the compressor. Flows into 210.

In addition, the inlet side of the accumulator 270 is provided with a suction pipe temperature sensor 272 for measuring the temperature of the refrigerant sucked and a low pressure sensor 274 for checking the pressure of the refrigerant.

On the other hand, the control box 280 is installed on the rear side of the front panel 205. The control box 280 has a long rectangular parallelepiped shape left / right, and is selectively shielded by a control cover 282 provided on the front surface so as to rotate based on the upper end portion.

Although not shown, a control component such as a voltage transformer, a printed circuit board (PCB), a capacitor, and the like is provided inside the control box 280, and a heat radiating unit 284 formed of heat radiating fins is formed on a rear surface of the control box 280.

A second heat exchanger 290 is provided on the rear side of the control box 280. The second heat exchanger 290 is a heat exchange between the refrigerant flowing through the water and the water, and has a rectangular parallelepiped appearance in the longitudinal direction.

Looking in detail with reference to Figure 7 the second heat exchanger 290 is the majority of the appearance is formed by the front case 291 and the rear case 291 ', the inside of the front case 291 and the rear case 291' There are a plurality of diaphragms P for guiding the water and the refrigerant to flow without being mixed with each other.

The diaphragm P has a substantially rectangular plate shape having a size smaller than the area of the front case 291 and the rear case 291 ', and is configured to contact one side with water and the other side with a refrigerant.

That is, through holes P 'are drilled in the four corner portions of the diaphragm P, and the pair is formed outside the two through holes P', which are diagonally disposed among the four through holes P '. Surface contact portion (P ") is formed so that the diaphragm (P) of the surface contact.

More specifically, the surface contact portion P ″ is formed at an edge of the through hole P ′ formed at a position crossing each other with respect to the adjacent plates P. Thus, any one of the plurality of plates P is provided. When water flows in the front of the diaphragm P, the refrigerant flows in the rear side and the refrigerant and the water are exchanged by heat conduction of the diaphragm P.

The front / side of the front case 291 is provided with inlet / outlet pipes 292 and 293 and refrigerant inlet / outlet pipes 294 and 295 for guiding water or refrigerant to flow into and out of the second heat exchanger 290.

That is, the water inlet pipe 292 and the water outlet pipe 293 connected to the through hole (P ') in the front of the second heat exchanger 290 to communicate with the through hole (P') is formed is formed The inlet pipe 292 is located below the outlet pipe 293.

In addition, a refrigerant inlet pipe 294 communicating with a through hole P ′ drilled on the left side of the diaphragm P on the upper and lower left sides of the front surface of the second heat exchanger 290 to guide the flow of the refrigerant. And a coolant outlet pipe 295 is formed, and the coolant inlet pipe 294 is positioned above the coolant outlet pipe 295.

Therefore, when water and refrigerant flow into the second heat exchanger 290, the water is guided by the diaphragm P to move from the upper side to the lower side. On the other hand, the refrigerant introduced into the second heat exchanger 290 is separated from the water by the diaphragm P to move upward from the lower side.

That is, in the second heat exchanger 290, the water and the refrigerant flow in the opposite directions so that the heat exchange efficiency of the water and the refrigerant can be maximized.

One side of the second heat exchanger 290, more precisely, one side of the outlet pipe 293 is provided with a coolant temperature sensor 296. The cooling water temperature sensor 296 is configured to measure the temperature of the water flowing out through the water outlet pipe 293 after heat exchange with the refrigerant in the second heat exchanger 290.

One side of the second heat exchanger 290, that is, one side of the water inlet pipe 292 is provided with a discharge means 320, which is a main component of the present invention. The discharge means 320 is a configuration for forcibly discharging the water inside the second heat exchanger 290 to the outside is applied to the pump to selectively operate when the power is applied to discharge the water.

That is, the discharge means 320 is configured to prevent the water temperature inside the second heat exchanger 290 is sharply lowered by the external temperature to freeze when the water-cooled air conditioner is not operated for a long time in winter.

To this end, the discharge means 320 is configured to interlock with the coolant temperature sensor 296. That is, the coolant temperature sensor 296 continuously detects the water temperature inside the outlet pipe 293. When the detected water temperature becomes 0 ° C. or lower, the coolant temperature sensor 296 generates a signal to print a printed circuit board. (PCB), the printed circuit board (PCB) is configured to apply power to the discharge means (320).

Accordingly, the water-cooled air conditioner discharges all of the water inside the second heat exchanger 290 by the discharge means 320 even when the external temperature drops below 0 ° C. in a state where the user does not use it for a long time in winter. As it becomes empty, no freezing occurs and damage to the second heat exchanger 290 can be prevented.

One side of the outer surface of the second heat exchanger 290, more precisely, a lower portion of the rear surface of the second heat exchanger 290, communicates with the inside of the second heat exchanger 290, so that the water inside the second heat exchanger 290 may be reduced. The drainage hole 330 is further provided to drain to the outside.

The drainage hole 330 is configured to prevent freezing inside the second heat exchanger 290 like the discharge means 320.

That is, a drain valve 340 for selectively opening the drain hole 330 is installed at one side of the drain hole 330, and the drain valve 340 is also the cooling water temperature sensor 296 like the discharge means 320. It is configured to work with).

In more detail, when the water temperature becomes 0 ° C. or lower while the coolant temperature sensor 296 detects the water temperature inside the outlet pipe 293, the coolant temperature sensor 296 is connected to a printed circuit board (not shown). The printed circuit board that transmits a signal and receives the signal naturally discharges water in the second heat exchanger 290 by applying power to the drain valve 340 to open the drain valve 340.

Therefore, the drain valve 340 is preferably applied to the solenoid valve so that it can be selectively opened or shielded when the power on / off, when the drain valve 340 is opened through the drain hole 330 A drain hose (not shown) may be connected to an end of the drain hole 330 so that water drained to the outside of the second heat exchanger 290 may exit the outside of the water-cooled air conditioner.

And, the drain means 320 may be installed on the left side of the second heat exchanger 290 as shown in FIG. That is, the installation position of the drainage means 320 may be applied to any position as long as it can drain water inside the second heat exchanger 290 to the outside.

A heat exchanger support 298 is provided below the second heat exchanger 290 (see FIG. 6). The heat exchanger support 298 is configured to support the second heat exchanger 290 so as to be spaced apart from the upper surface of the base fan 209.

That is, the upper surface of the heat exchanger support 298 has a slightly larger area than the lower surface of the second heat exchanger 290, the rear half is formed to be inclined toward the lower rear from the rear end of the upper surface. The lower end of the heat exchanger support 298 is coupled to the base fan 209 and fixed thereto.

Hereinafter, the operation of the water-cooled air conditioner according to the present invention having the configuration as described above will be described with reference to FIGS. 8 to 10.

9 is a block diagram showing the flow of the refrigerant and water in the water-cooled air conditioner according to the present invention during heating operation, Figure 10 is a block diagram showing a control method of the water-cooled air conditioner according to the present invention.

First, when the water-cooled air conditioner operates in the cooling mode, referring to the refrigerant flow with reference to FIG. 8, the outdoor solenoid valve 234 is opened to guide the refrigerant to flow between the outdoor side 200 and the indoor side 100. It is a state.

Looking at the refrigerant flow in the outdoor side 200, the gas refrigerant flowing from the indoor side 100 passes through the four-way valve 240 through the four-way three outlet port 248 to the four-way two. The accumulator 270 enters through the outlet port 246. The gas refrigerant leaving the accumulator 270 is introduced into the compressor 210.

The refrigerant compressed by the compressor 210 is discharged to the outside of the compressor 210 and passes through the oil separator 218. In the oil separator 218, oil contained in the refrigerant is separated and recovered to the compressor 210 through the oil recovery pipe 219.

That is, as the refrigerant is compressed in the compressor 210, oil is mixed in the refrigerant. Since the oil is in the liquid state and the refrigerant is in the gas state, the oil is separated from the oil separator 218 which is a gas / liquid separator.

On the other hand, the oil inside the compressor 210 on both sides is balanced by the oil equalizing pipe 216 connecting the constant speed compressor 212 and the inverter compressor 214.

The refrigerant passing through the oil separator 218 flows into the four-way valve 240 through the four inlet port 242 and passes through the second one-way outlet port 244. And flows to 290.

At this time, the refrigerant flowing into the second heat exchanger 290 is introduced into the second heat exchanger 290 through the refrigerant inlet pipe 294, and the second heat exchange from the cooling tower C through the inlet pipe 292. The water is cooled through heat exchange with the water introduced into the vessel 290 to be a liquid refrigerant. The refrigerant passing through the second heat exchanger 290 is further cooled while passing through the subcooler 260.

At the same time, the water warmed during the heat exchange with the refrigerant in the second heat exchanger 290 is discharged to the outside of the second heat exchanger 290 through the water outlet pipe 293 and then through the water outlet passage 202 ″. It is introduced into the cooling tower (C).

After the water flowing into the cooling tower C is cooled, the water flows back into the second heat exchanger 290 through the water inlet 202 ′.

On the other hand, the refrigerant passing through the subcooler 260 passes through a dryer (not shown) to remove moisture contained in the refrigerant, and then flows into the indoor side 100 through the common liquid pipe 132.

The refrigerant introduced into the indoor side 100 is decompressed by an expansion valve (not shown), and then heat exchanges in the first heat exchanger 120. At this time, since the first heat exchanger 120 serves as an evaporator, the refrigerant becomes a low pressure gas through heat exchange.

The gaseous refrigerant heat exchanged through the first heat exchanger 120 flows along the common engine 134 and then flows into the accumulator 270 through the four-way valve 240.

In the accumulator 270, the liquid phase refrigerant that has not been evaporated is filtered out, and only the gaseous refrigerant is sorted and supplied to the compressor 210. One cooling cycle is completed through the above process.

Hereinafter, when the water-cooled air conditioner is operated in a heating operation in winter, the control method of the water-cooled air conditioner using the coolant temperature sensor 296 will be described.

First, when the coolant temperature sensor 296 is selected as a heating mode in a continuously operating state, the coolant temperature sensor 296 is a water temperature inside the second heat exchanger 290, more specifically, the water outlet pipe 293. ) To measure the internal water temperature (water temperature measurement step: S100)

Thereafter, the controller compares the temperature measured by the coolant temperature sensor 296 with a set temperature (0 ° C.). (Water temperature comparison step: S200) At this time, the water temperature measured by the coolant temperature sensor 296 is 0 ° C. In the following case, since the water inside the second heat exchanger 290 may freeze, this information is signaled and sent to the printed circuit board to apply power to the discharge means 320. (Drainage step: S300)

When power is applied to the discharge means 320, the water inside the second heat exchanger 290 is pumped to the outside to be drained, so that freezing inside the second heat exchanger 290 may be blocked beforehand.

At the same time, in the drainage step S300, the printed circuit board (not shown) opens the drainage hole 330 by applying power to the drain valve 340.

When the drain hole 330 is opened, the water inside the second heat exchanger 290 is drained out of the water-cooled air conditioner along a drain hose (not shown) so that the second heat exchanger 290 is prevented from freezing. .

Hereinafter, the refrigerant flow during the heating operation of the water-cooled air conditioner according to the present invention as described above will be described with reference to FIG.

First, in order for the water-cooled air conditioner to be heated, the drain valve 340 must be shielded, and the cooling tower C is operated to allow water to flow into the second heat exchanger 290 through the water inlet 202 '. It should be allowed to flow in.

That is, even when the temperature of the water outlet pipe 293 detected by the coolant temperature sensor 296 is 0 ° C. or less, the drain valve 340 is shielded when the user proceeds to the heating operation mode. Obviously, it should be set in advance, and the discharge means 320 may be operated.

Referring to the flow of the refrigerant, the refrigerant compressed from the compressor 210 flows through the four-way three outlet port 248 and passes through the common engine 134 and then flows into the interior side 100. .

The refrigerant introduced into the indoor side (100 of FIG. 3) is heat-exchanged with indoor air in the first heat exchanger (120 of FIG. 3) and condensed after being condensed with the indoor air. 200) flows inside.

The refrigerant introduced into the outdoor side 200 enters the second heat exchanger through the refrigerant outlet pipe 295 to exchange heat with water, and the heat exchanged refrigerant is transferred to the second heat exchanger through the refrigerant inlet pipe 294. 290 is discharged to the outside.

Thereafter, the four-way one outlet port 244 and the four-way two outlet port 246 pass through the four-way valve 240, and then flow into the accumulator 270, and within the accumulator 270. After the liquid refrigerant is filtered, only the gaseous refrigerant is introduced into the compressor 210 to complete the heating cycle.

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

For example, in the embodiment of the present invention, when the water temperature inside the second heat exchanger is lower than the set temperature, the discharge means and the drain valve are operated by the printed circuit board to drain the water inside the second heat exchanger. If necessary, the buzzer or the lamp may be used to allow the user to be aware of this, and a separate switch may be provided to allow the user to directly apply power to the discharge means.

In the water-cooled air conditioner according to the present invention as described in detail above, the discharge means for selectively discharging the water in the second heat exchanger is provided on one side of the second heat exchanger for circulating the refrigerant and the water inside the heat exchanger, One side of the second heat exchanger is further provided with a coolant temperature sensor, the discharge means is configured to interlock with the coolant temperature sensor.

In the present invention, a drainage hole communicating with the inside is formed at one side of the second heat exchanger, a drainage valve is provided at one side of the drainage hole, and the drainage valve is configured to interlock with the coolant temperature sensor.

Therefore, there is an advantage that the freezing of the second heat exchanger is prevented even if the user does not operate the water-cooled air conditioner for a while in winter.

In addition, since it is possible to prevent the freezing of the winter season in advance, there is an advantage that the damage of the second heat exchanger is prevented.

In addition, the ease of use of the water-cooled air conditioner is improved, thereby improving product reliability.

Claims (14)

A first heat exchanger for heat-exchanging indoor air with a refrigerant; A compressor for compressing the refrigerant; A second heat exchanger configured to heat-exchange the refrigerant compressed by the compressor with water; Discharge means provided at one side of the second heat exchanger to forcibly discharge the water inside the second heat exchanger to the outside to prevent water freezing inside the second heat exchanger; And And a control unit for measuring the water temperature of the second heat exchanger and selectively operating the discharge means according to the difference between the measured water temperature and the set temperature. The method of claim 1, The water temperature of the second heat exchanger, the water-cooled air conditioner, characterized in that it comprises a water temperature or the discharge water temperature inside the second heat exchanger. The method of claim 1, The discharge means is a water-cooled air conditioner is operated so that the water of the second heat exchanger is discharged when the water temperature inside the second heat exchanger is lower than the set temperature in the operation stop state. The method of claim 1, One side of the outer surface of the second heat exchanger, the water-cooled air conditioner is provided with a drain hole which is drilled to communicate with the inside of the second heat exchanger to guide the water inside the second heat exchanger to the outside. The method of claim 4, wherein The drain hole is a water-cooled air conditioner, characterized in that formed in the lower portion of the second heat exchanger. The method of claim 4, wherein Further comprising a drain valve for selectively opening the drain hole, The water-cooled air conditioner of claim 2, wherein when the water temperature of the second heat exchanger falls below a reference temperature while the operation is stopped, the discharge means and the drain valve are operated together. The method of claim 1, The discharge means is a water-cooled air conditioner, characterized in that the pump. The method of claim 1, One side of the second heat exchanger, the water-cooled air conditioner, characterized in that the cooling water temperature sensor for measuring the temperature of the water passing through the inside of the second heat exchanger. The method of claim 8, The discharge means is a water-cooled air conditioner, characterized in that installed on at least one side of the inlet and outlet pipe for guiding the outflow / mouth of the water into / outside the second heat exchanger. The method of claim 8, The cooling water temperature sensor is a water-cooled air conditioner, characterized in that installed on one side of the discharge pipe. A water temperature measuring step of measuring, by the cooling water temperature sensor provided at one side of the second heat exchanger for exchanging water and the refrigerant, the water temperature in the second heat exchanger; A water temperature comparison step of comparing the water temperature measured by the coolant temperature sensor with a set temperature in the controller; And And draining the water inside the second heat exchanger to the outside according to a difference between the measured temperature and the set temperature compared by the controller so as to prevent water freezing inside the second heat exchanger. Control method of a water-cooled air conditioner, characterized in that. The method of claim 11, The draining step is a control method of a water-cooled air conditioner, characterized in that the control unit is to open the drain valve provided on one side of the drainage hole when the measured temperature is less than the set temperature. The method of claim 11, The draining step is a control method of a water-cooled air conditioner, characterized in that for draining the water inside the second heat exchanger by opening a drain hole provided on one side of the outer surface of the second heat exchanger. The method according to claim 12 or 13, The control method of the water-cooled air conditioner, characterized in that for operating the compressor to compress the refrigerant when the measured temperature is higher than the set temperature.

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