KR101180207B1 - Water Cooling Type Air Conditioner - Google Patents

Abstract

The present invention is a water-cooled air conditioner equipped with a plotter switch and a coolant temperature / pressure sensor for detecting the presence or absence of water in the second heat exchanger and the flow of water on one side of the second heat exchanger for circulating heat exchanged inside the refrigerant and water. It is about.

The water-cooled air conditioner according to the present invention includes a compressor (210) for compressing a refrigerant, a plate-shaped second heat exchanger (290) for exchanging heat with the refrigerant compressed by the compressor (210), and the second heat exchanger. It is installed to communicate with the inside of the second heat exchanger 290 on one side of the top / bottom of the 290 is configured to include an inlet pipe 292 and the outlet pipe 293 for guiding the outflow / mouth of the water, the inlet pipe 292 And one side of the outlet pipe 293, the plotter switch 320 for detecting the presence of water by measuring the water level inside the inlet pipe 292 or the outlet pipe 293, the inlet pipe 292 and the water outlet At least one or more of the flow sensing means for detecting the flow of water by measuring the internal water pressure or water temperature of the tube 293 is characterized in that it is provided. According to such a configuration, there is an advantage that overheating and damage of the second heat exchanger are prevented.

Water-cooled, air conditioner, second heat exchanger, water sensor, sensor

Description

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

1 is a partial cutaway view showing the configuration 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 7a 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.

7B is an enlarged view showing a state in which a plotter switch, which is one component of a water-cooled air conditioner according to the present invention, is mounted;

8A is a block diagram showing a method of controlling a water-cooled air conditioner using a plotter switch which is a main component of the present invention.

Figure 8b is a block diagram showing a method for controlling a water-cooled air conditioner using the cooling water pressure sensor which is a main component of the present invention.

8 c is a block diagram showing a method of controlling a water-cooled air conditioner using a coolant temperature sensor, which is a main component of the present invention;

Figure 8d is a block diagram showing a method for controlling a water-cooled air conditioner using the plotter switch and the flow sensing means of the main components of the present invention.

9 is a block diagram showing the flow of refrigerant and water during the heating operation of the 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

320. Plotter Switch 322. Plotter

324. Nuts 326. Switch section

328. Sealer 340. Coolant pressure sensor

342. Inlet pressure sensor 344. Inlet pressure sensor

360. Coolant temperature sensor 362. Intake temperature sensor

364. Outflow temperature sensor 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 water-cooled air for preventing freezing in winter by further comprising a heating means on one side of a second heat exchanger that circulates the refrigerant and water to heat exchange the refrigerant and water. It's about harmonics.

In general, an air conditioner is a cooling / heating system that sucks hot air in a room and heat-exchanges the refrigerant with low-temperature refrigerant, and then discharges the refrigerant into the room, thereby cooling the room or heating the room by the opposite action. - a condenser - an expansion valve - an evaporator to form a series of refrigerant cycles.

In recent years, in order to improve the quality of life and to meet the needs of customers, air purification function to suck polluted air in the room outside the air conditioner and filter it into clean air and re-input it into the room, And dehumidifying function for re-inputting.

The air conditioner is usually installed outdoors (outdoor side or heat dissipation side) and indoor side (mainly indoor or endothermic) is installed inside the building. 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 broadly divided into a separate type air conditioner in which the outdoor side and the indoor side are separated from each other, and an integral type air conditioner in which the outdoor side and the indoor side are integrally installed. In consideration of the installation space and noise, The trend is favored.

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, the water-cooled condenser 12 is introduced into the water and the refrigerant to cross each other as described above. Therefore, water must be introduced into the water-cooled condenser 12 to exchange heat with the refrigerant.

However, since the water-cooled condenser 12 does not describe any configuration for detecting the presence or absence of water and whether the water flows, the indoor air cannot be harmonized and the user may have distrust in the product.

In addition, water leakage or freezing may cause damage to the water-cooled condenser 12, which is undesirable.

In addition, breakage of the water-cooled condenser 12 is not preferable because of the enormous repair cost.

Therefore, an object of the present invention is to solve the problems of the prior art as described above, a plotter switch for detecting the presence or absence of water in the second heat exchanger on one side of the second heat exchanger for circulating the refrigerant and water inside the heat exchanger It is to provide a water-cooled air conditioner is provided.

Another object of the present invention, a water-cooled air conditioner is provided with a coolant temperature sensor and a coolant pressure sensor for detecting the flow of water in the second heat exchanger on one side of the second heat exchanger for circulating the refrigerant and water inside the heat exchanger It is to offer.

Still another object of the present invention is a water-cooled type that prevents the second heat exchanger from being burned out by detecting whether there is water in the second heat exchanger and whether the water flows in conjunction with the coolant temperature sensor, the coolant pressure sensor, and the plotter switch. It is to provide a control method of an air conditioner.

The water-cooled air conditioner according to the present invention for achieving the above object includes a compressor for compressing a refrigerant, a plate-shaped second heat exchanger for exchanging a refrigerant compressed by the compressor with water, and the second heat exchanger. Inlet and outlet pipes installed on the upper / lower side of the second heat exchanger to guide the outflow / inflow of water, and installed on one side of the outlet pipe and measure the level of the inside of the outlet pipe to measure the inside of the outlet pipe. Characterized by including a plotter switch to detect the presence or absence of water.

A compressor for compressing the refrigerant, a second heat exchanger for exchanging the refrigerant compressed by the compressor with water, and an upper / lower side of the second heat exchanger communicating with the inside of the second heat exchanger to guide the outflow / inflow of water. It is characterized in that it comprises a water inlet pipe and a water outlet pipe, and a cooling water pressure sensor is installed on one side of the water inlet pipe and the water outlet pipe to detect the flow of water by measuring the internal water pressure of the water inlet pipe and the water outlet pipe.

A compressor for compressing the refrigerant, a plate-shaped second heat exchanger for exchanging the refrigerant compressed by the compressor with water, and an upper / lower one side of the second heat exchanger to communicate with the inside of the second heat exchanger so that water flows out / And a cooling water temperature sensor installed at one side of the water inlet pipe and the water outlet pipe to guide the mouth, and measuring the temperature of the water inside the water inlet pipe and the water outlet pipe to detect the flow of water. .

A compressor for compressing the refrigerant, a plate-shaped second heat exchanger for exchanging the refrigerant compressed by the compressor with water, and an upper / lower one side of the second heat exchanger to communicate with the inside of the second heat exchanger so that water flows out / It comprises a water inlet pipe and a water outlet pipe for guiding the mouth, on one side of the water inlet pipe or the water outlet pipe, a plotter switch for detecting the presence of water by measuring the water level inside the water inlet pipe or the water outlet pipe, the water inlet pipe and It is characterized in that the flow sensing means for detecting the flow of water by measuring the internal water pressure or water temperature of the outlet pipe.

The flow detecting means is characterized in that at least one or more of the coolant pressure sensor or the coolant temperature sensor for measuring the water pressure or water temperature.

The plotter switch is characterized in that the compressor is operated when the set level or more.

The set water level is characterized in that the height of 1/2 the inner diameter of the outlet pipe.

The cooling water pressure sensor is characterized in that it comprises a water inlet pressure sensor for measuring the water pressure in the water inlet pipe, and a water outlet pressure sensor for measuring the water pressure in the water outlet pipe.

The compressor is operated when the pressure difference measured by the inlet pressure sensor and the outlet pressure sensor is less than or equal to a set pressure difference.

The set pressure difference is characterized in that 20 kPa.

The coolant temperature sensor is characterized in that it comprises a water extraction temperature sensor for measuring the water temperature inside the water outlet pipe, and the water temperature sensor for measuring the water temperature inside the water inlet pipe.

The compressor is stopped when the temperature difference measured by the water extraction temperature sensor and the water acquisition temperature sensor is less than or equal to a set temperature difference.

The set temperature difference is characterized in that 3 ℃.

The control method of the water-cooled air conditioner according to the present invention, the water level measuring step of measuring the internal water level of any one of the inlet and outlet pipes for the plotter switch provided on one side of the second heat exchanger to guide the outflow / intake of water, and A level comparison step of comparing the measured level and the set level measured by the plotter switch with the control unit, and a control step of selectively driving the compressor according to the difference between the measured level and the set level compared by the control unit. do.

A pressure measurement step of measuring the water pressure inside the inlet and outlet pipes through which the coolant pressure sensor provided at one side of the second heat exchanger guides the outflow / inlet of water; and the pressure difference between the inlet and outlet pipes measured by the coolant pressure sensor; It characterized in that it comprises a hydraulic pressure comparing step of comparing the pressure with the set pressure in the control unit, and a control step for selectively driving the compressor according to the difference between the pressure difference and the set pressure compared in the control unit.

A water temperature measuring step of measuring the water temperature inside the water inlet and outlet pipes through which the coolant temperature sensor provided at one side of the second heat exchanger guides the outflow / inflow of water, and the water temperature inside the inlet and outlet pipes measured by the coolant temperature sensor. Comprising a water temperature comparison step of comparing the difference with the set temperature in the control unit, and a control step for selectively driving the compressor according to the difference between the water temperature difference and the set temperature compared in the control unit.

The water level measurement step of measuring the internal water level of any one of the water supply pipe and the water discharge pipe guided by the plotter switch provided on one side of the second heat exchanger, and the flow sensing means provided on one side of the second heat exchanger A flow sensing step of detecting water flow in the heat exchanger, a level comparison step in which the control unit compares the measured level measured by the plotter switch with a set level, and a measurement level and a set level measured in the level comparison step. And a control step in which the controller selectively drives the compressor according to a difference value and whether water is detected by the flow sensing means.

The flow sensing step is characterized in that the cooling water pressure sensor or the cooling water temperature sensor provided on one side of the second heat exchanger is a process of measuring the water pressure or the water temperature inside the water inlet and outlet pipe for guiding the outflow / intake of water.

The controller is characterized in that for driving the compressor when the measured water level is above the set water level.

The controller is characterized in that for driving the compressor when the pressure difference is greater than the set pressure.

The controller is characterized in that for applying the driving of the compressor when the water temperature difference is less than the set temperature.

According to the present invention having such a configuration, there is an advantage that overheating and breakage of the second heat exchanger are prevented in advance.

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

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 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. 7A, 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 intake port 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 is a heat exchange for indoor air 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. 7A) which is a piping, and the common pipe (134 of FIG. 7A) which are a single pipe through which a gas refrigerant flows are provided.

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 heat exchanged with the refrigerant back into the cooling tower C while passing through the second heat exchanger 290. It is configured by.

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 for exchanging water and refrigerant with each other, and the circulation of the refrigerant and the water passing through the second heat exchanger is independent of the multi / integrated type. Since the same, detailed description of the other components will be omitted.

Hereinafter, the configuration of the outdoor side 200 will be described in detail by taking a multi-type water-cooled air conditioner as an example.

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. The exploded perspective view shown is shown, Figure 7a is a block diagram showing the flow of the refrigerant and water during the cooling operation of the water-cooled air conditioner according to the present invention.

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. The exploded perspective view shown is shown, Figure 7a is a block diagram showing the flow of the refrigerant and water during the cooling operation of the water-cooled air conditioner according to the present invention.

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 which forms the left and right side exteriors, and the base pan 209 which supports many 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 a rectangular plate shape in which no hole is formed. Have

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, the constant speed compressor 212 is not available. 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, the hot gas pipe 250.hot gas to allow a part 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 in the four directions It is installed via the 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 air conditioner, the high pressure refrigerant at the discharge port side of the compressor 210 may be 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.

On the other hand, the outlet of the subcooler 260 is provided with a liquid pipe temperature sensor 263 for measuring the temperature of the refrigerant discharged from the outdoor side 200, the subcooling inlet sensor 265 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 remaining in the liquid phase without being evaporated is stored in the lower portion 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 of the compressor 210 is used. Inflow).

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.

Although not shown, the second heat exchanger 290 is provided with a plurality of water flow tubes and refrigerant flow tubes for guiding the water and the refrigerant to flow without being mixed with each other. The plurality of water flow pipes and the refrigerant flow pipes are disposed to cross each other so as to be adjacent to each other to allow the water and the refrigerant to exchange heat with each other.

That is, a coolant flow tube (not shown) is surrounded around the water flow tube (not shown), and a water flow tube is disposed around the coolant flow tube. Therefore, the water flow tube and the refrigerant flow tube is preferably formed to have the same cross-sectional shape and size.

For example, it may be formed to have a regular hexagonal cross section and arranged in a honeycomb shape.

On the front surface of the second heat exchanger 290 (as shown in FIG. 6), the inlet / outlet pipes 292 and 293 and the refrigerant inlet / outlet pipe guiding water or the refrigerant to flow into and out of the second heat exchanger 290 ( 294,295).

That is, the water inlet pipe 292 and the water outlet pipe which penetrates the inside of the second heat exchanger 290 and communicates with the water flow pipe in the upper right / lower part of the front surface of the second heat exchanger 290 to guide the flow of water. 293 is formed, and the water inlet pipe 292 is located below the water outlet pipe 293.

In addition, a refrigerant inlet pipe guiding flow / exit of the refrigerant by passing through the inside of the second heat exchanger 290 and communicating with the refrigerant flow tube (not shown) in the upper left / lower part of the front surface of the second heat exchanger 290 ( 294 and a refrigerant outlet pipe 295 are formed, and the refrigerant inlet pipe 294 is positioned above the refrigerant outlet pipe 295.

Therefore, when water and refrigerant flow into the second heat exchanger 290, the water is guided along the water flow tube inside the second heat exchanger 290 to move from the upper side to the lower side. On the other hand, the refrigerant introduced into the second heat exchanger 290 is guided along the refrigerant flow tube 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.

On the other hand, one side of the second heat exchanger 290, more precisely, one side of the outer surface of the water inlet pipe 292 and the water outlet pipe 293 is provided with a cooling water temperature sensor 360, which is a main component of the present invention.

The cooling water temperature sensor 360 is for measuring the temperature of the water passing through the second heat exchanger 290, the inlet temperature sensor 362 provided on one side of the outer surface of the inlet pipe 292, and the outlet tube And a water extraction temperature sensor 364 provided on an outer surface of the 293.

Accordingly, the water inlet temperature sensor 362 measures the temperature of water introduced into the second heat exchanger 290 through the water inlet tube 292, and the water outlet temperature sensor 364 measures the water outlet tube 293. The temperature of the water exiting the second heat exchanger 290 is measured.

In addition, the coolant temperature sensor 360 determines whether water flows inside the second heat exchanger 290 according to the difference in the water temperature measured by the inlet temperature sensor 362 and the outlet water temperature sensor 364. Configured to selectively stop the operation of 210.

That is, the water inlet temperature sensor 362 and the water outlet temperature sensor 364 are electrically connected to the printed circuit board (not shown), and the water temperature measured by the water inlet temperature sensor 362 and the water outlet temperature sensor 364. Is transmitted to the printed circuit board.

The printed circuit board subtracts two water temperatures received from the water inlet temperature sensor 362 and the water outlet temperature sensor 364 (subtracting the water temperature of the water inlet tube 292 from the water temperature of the water outlet tube 293). After that, the operation of the compressor 210 is selectively stopped by comparing with a preset temperature difference (3 ° C.).

More specifically, when the water-cooled air conditioner is operated in the cooling mode, when the temperature difference between the water passing through the inlet pipe 292 and the outlet pipe 293 is less than 3 ° C., the second heat exchanger 290 may be It can be seen that the heat exchange between the refrigerant and water has not occurred, which is determined that no flow of water has occurred, so that the printed circuit board is configured to limit the operation of the compressor 210.

At this time, of course, the printed circuit board may be configured to send a signal to a display or buzzer provided separately, so that the user may recognize that the water inside the second heat exchanger 290 does not move.

One side of the water inlet pipe 292 and the water outlet pipe 293 is provided with a flow sensing means for detecting whether the water flows inside the second heat exchanger 290 by using a hydraulic pressure difference. The flow sensing means may be variously applied, and in the embodiment of the present invention, the coolant pressure sensor 340 and the coolant temperature sensor 360 using pressure and temperature are applied, but at least one of the two may be applied. Do.

That is, the coolant pressure sensor 340 measures the pressure of the water passing through the inlet pipe 292 and the outlet pipe 293, the inlet pressure sensor 342 provided on one side of the outer surface of the inlet pipe 292. And a water extraction pressure sensor 344 provided on one side of the outer surface of the water outlet pipe 293.

The coolant pressure sensor 340 is configured to transmit the measured hydraulic pressure data to the printed circuit board in the same manner as the coolant temperature sensor 360. The printed circuit board includes the inlet pressure sensor 342 and the outlet pressure sensor 344. ) Is configured to subtract the two hydraulic pressure data sent and compare it with a preset set pressure difference.

That is, the inlet pressure sensor 342 and the outlet pressure sensor 344 are electrically connected to the printed circuit board (not shown), and the water pressure measured by the inlet pressure sensor 342 and the outlet pressure sensor 344 is Sent to the printed circuit board.

The printed circuit board subtracts the two pressures received from the water inlet pressure sensor 342 and the water outlet pressure sensor 344 (the water pressure inside the water outlet pipe 293 and the water pressure inside the water inlet pipe 292). After that, the operation of the compressor 210 is selectively stopped by comparing with the preset pressure difference 20 kPa.

More specifically, when the water-cooled air conditioner is operated in the cooling mode, when the pressure difference between the water passing through the inlet pipe 292 and the outlet pipe 293 is 20 kPa or more, the second heat exchanger 290 is disposed inside the inside. It is determined that the foreign matter is loaded, and when operating in the heating mode, it is determined that the water inside the second heat exchanger is frozen, and the printed circuit board limits the operation of the compressor 210.

At this time, of course, the printed circuit board may be configured to send a signal to a display or buzzer provided separately, so that the user may recognize that the water flow inside the second heat exchanger 290 is not smooth. will be.

On the contrary, when the water-cooled air conditioner is operated in a cooling and heating mode, when the water pressure difference between the inlet pipe 292 and the outlet pipe 293 is less than 20 kPa, it is determined that smooth water flow is possible. By applying power to the 210 to drive the water-cooled air conditioner to operate normally.

On the other hand, one side of the outlet pipe 293 is provided with a plotter switch 320 for measuring the water level by measuring the level of water flowing in the outlet pipe 293.

Hereinafter, the configuration of the plotter switch will be described in detail with reference to FIG. 7B.

7B is an enlarged view showing a state in which a plotter switch, which is one component of a water-cooled air conditioner according to the present invention, is mounted.

As shown in the drawing, the plotter switch 320 is configured to measure the water level using buoyancy, and is penetrated inward from the outer circumferential surface of the water outlet pipe 293 to the inside, and the plotter switch ( The inside of the plotter 322 is provided.

That is, the plotter 322 is accommodated in a state in which air is sealed therein, and is installed to be able to flow in an up / down direction according to the water level, and nuts 324 are respectively provided on the inside / outside of the outlet pipe 293. It is provided one by one and is fastened to the upper portion of the plotter switch 320.

Accordingly, when the plotter switch 320 is fixed while being inserted into the outlet pipe 293, the plotter 322 may flow in an up / down direction according to the height of water flowing in the outlet pipe 293. .

An upper side of the plotter 322 is provided with a switch unit 326 for generating an electrical signal selectively contacting the upper end of the plotter 322 when the plotter 322 flows upward by the buoyancy.

The switch unit 326 is electrically connected to the printed circuit board and is configured to transmit an electrical signal to the printed circuit board when contacted with the plotter 322. The printed circuit board is electrically connected to the printed circuit board. The signal enables selective operation of the compressor 210.

The plotter switch 320 generates an electrical signal to the printed circuit board when the water level inside the outlet pipe 293 is equal to or higher than a preset level. That is, in order for the second heat exchanger 290 to exchange heat between the water and the refrigerant, the water should be filled in at least half of the outlet pipe 293. That is, the set water level should be equal to or greater than 1/2 the inner diameter of the water outlet pipe 293.

Therefore, the switch unit 326 is preferably to be installed at a height in consideration of the floating position of the plotter 322 in order to be able to selectively generate an electrical signal according to the set water level.

More specifically, it is preferable that the plotter 322 be configured to contact the switch unit 326 when water is filled by half of the height of the outlet pipe 293.

A rubber sealer 328 is provided between the pair of nuts 324, and the sealer 328 serves to shield the water inside the outlet pipe 293 from leaking to the outside.

Referring again to FIG. 7A, a heat exchanger support 298 is provided below the second heat exchanger 290. 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. 7A and 8A to 9.

8A to 8D are block diagrams illustrating a method of controlling a water-cooled air conditioner according to the present invention, and FIG. 9 is a block diagram showing the flow of refrigerant and water during the heating operation of the water-cooled air conditioner according to the present invention. Is shown.

Before the water-cooled air conditioner operates in the cooling mode, the plotter switch 320 installed in the second heat exchanger 290 is measuring the water level inside the outlet pipe 293 (level measurement step S120). The coolant pressure sensor 340 and the coolant temperature sensor 360 are measuring the pressure and temperature of the water passing through the outlet pipe 293 and the inlet pipe 292. (Hydraulic measurement step (S140) and Water temperature measurement step (S160))

Therefore, in order for the water-cooled air conditioner to be operated by a user's operation, the water pipe 293 should be filled with water more than half so that the plotter 322 and the switch unit 326 are in contact with each other (see FIG. 7B). ). That is, the electrical signal generated by the contact between the plotter 322 and the switch unit 326 is transmitted to the printed circuit board it can be seen that there is water in the second heat exchanger (290).

In addition, whether the water in the outlet pipe 293 and the inlet pipe 292 is detected by the coolant pressure sensor 340 and the coolant temperature sensor 360 is flowing (flow detection step: S200) and at the same time flow It is in a state of being measured whether it is smooth.

Thereafter, the controller (not shown) compares the measured water level measured by the plotter switch 320 and the set water level (water level comparison step: S220), and the water pressure inside the inlet pipe and the outlet pipe measured by the coolant pressure sensor 340. The difference is compared with the set pressure (water pressure comparison step: S240), and the temperature difference between the inlet and outlet pipes measured by the coolant temperature sensor is compared with the set temperature (water temperature comparison step: S260).

In more detail, the water-cooled air conditioner has a difference between the water pressures measured by the water extraction pressure sensor 344 and the water inlet pressure sensor 342 within 20 kPa, and the water outlet temperature sensor 364 and the water inlet temperature sensor 362. It is possible to operate when the difference of measured water temperature is over 3 ℃.

If the difference between the water pressure measured by the water extraction pressure sensor 344 and the water input pressure sensor 342 is 20 kPa or more, it can be seen that the water inside the second heat exchanger 290 is frozen in the winter season. In the summer, it can be expected that foreign matters are loaded in the second heat exchanger 290.

In addition, when the difference between the water temperature measured by the water extraction temperature sensor 364 and the water intake temperature sensor 362 is less than or equal to 3 ℃, it can be seen that the water inside the second heat exchanger 290 is frozen in the winter season In the summer, it can be expected that foreign matters are loaded in the second heat exchanger 290.

Therefore, the cooling water pressure sensor 340 and the cooling water temperature sensor 360 are different from each other, but the purpose of checking the same is the same.

In addition, the plotter switch 320 may also be used alone in a state in which operations of the coolant pressure sensor 340 and the coolant temperature sensor 360 are turned off (off) as long as it is not a winter season when icing occurs.

When the water level and the flow of the inside of the second heat exchanger 290 detected by the plotter switch 320, the coolant pressure sensor 340, and the coolant temperature sensor 360 as described above are within a normal range in which heat can be exchanged with the refrigerant. The controller sends this signal to the printed circuit board.

In addition, the saik printed circuit board is applied to the compressor 210 according to the signal received from the control unit (control step: S300) so that the refrigerant is compressed so that the water-cooled air conditioner can be operated in the cooling mode.

At this time, the outdoor solenoid valve 234 is opened to guide the refrigerant to flow between the outdoor side 200 and the indoor side 100.

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 ′.

Meanwhile, the refrigerant passing through the subcooler 260 passes through a dryer to remove moisture contained in the refrigerant, and then flows into the interior side 100, and is decompressed by an expansion valve and then the first heat exchanger 120. ) Will exchange heat. At this time, since the first heat exchanger 120 serves as an evaporator, the refrigerant becomes a low pressure gas through heat exchange.

The refrigerant heat-exchanged while passing 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.

Meanwhile, referring to FIG. 8, a refrigerant flow when the water-cooled air conditioner is operated in a heating operation in winter, the refrigerant compressed from the compressor 210 passes through the indoor side 100 and then through the outdoor liquid pipe 262. It flows into the outdoor side 200 and then heat exchanges with water while passing through the second heat exchanger 290.

Then, the heat exchanged refrigerant passes through the four-way outlet port 244 and the four-way outlet port 246 in order to filter the liquid refrigerant in the accumulator 270 and then flows into the compressor 210. This completes the heating cycle.

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

In the water-cooled air conditioner according to the present invention as described above in detail, a plotter switch for sensing the water level inside the second heat exchanger is provided on one side of the second heat exchanger for circulating the refrigerant and water therein.

Thus, there is an advantage that overheating of the second heat exchanger, which may occur when there is no water or at a water level below an appropriate level, is prevented.

In addition, in the water-cooled air conditioner according to the present invention, a coolant temperature sensor and a coolant pressure sensor are provided at one side of the second heat exchanger to detect whether water in the second heat exchanger flows.

Therefore, the user can recognize whether the foreign matter is loaded or frozen in the second heat exchanger, thereby improving convenience of use.

In addition, the above advantages are expected to improve the product reliability of the user.

Claims (21)

A compressor for compressing the refrigerant; A second heat exchanger configured to heat-exchange the refrigerant compressed by the compressor with water; Water inlet and outlet pipes installed at upper and lower sides of the second heat exchanger to communicate with the inside of the second heat exchanger to guide the outflow / inflow of water; Water level sensing means installed on one side of the water inlet pipe or the water outlet pipe to detect the presence of water by measuring the water level inside the water inlet pipe or the water outlet pipe; And Includes; flow sensing means installed on one side of the inlet or outlet pipe to detect the flow of water by measuring the water pressure or water temperature inside the inlet or outlet pipe; When the flow rate of the coolant flowing through the second heat exchanger by the water level sensing means and the flow sensing means is a predetermined level or more, the compressor is operated. If the flow rate of the cooling water is less than a certain level, the water-cooled air conditioner characterized in that the operation of the compressor is stopped. The method of claim 1, The flow detection means is a water-cooled air conditioner, characterized in that at least any one or more of the cooling water pressure sensor or the cooling water temperature sensor for measuring the water pressure or water temperature. The method of claim 1, And the compressor is operated when the level detected by the level detecting means is equal to or higher than the set level. The method of claim 3, wherein The set water level is a water-cooled air conditioner, characterized in that more than 50% of the inner diameter of the cooling water flow path. The method of claim 2, The coolant pressure sensor, An inlet pressure sensor for measuring the water pressure inside the inlet pipe; And And a water extraction pressure sensor for measuring the water pressure in the water outlet pipe. 6. The method of claim 5, And the compressor is operated when the water pressure difference measured by the water inlet pressure sensor and the water outlet pressure sensor is equal to or less than a set pressure difference. The method of claim 6, The set pressure difference is a water-cooled air conditioner, characterized in that 20㎪. The method of claim 2, The coolant temperature sensor, A water extraction temperature sensor for measuring the water temperature inside the water outlet tube; And Water-cooled air conditioner comprising a; water temperature sensor for measuring the water temperature inside the water pipe. 9. The method of claim 8, And the compressor is stopped when the temperature difference measured by the water extraction temperature sensor and the water acquisition temperature sensor is equal to or less than a set temperature difference. The method of claim 9, The set temperature difference is a water-cooled air conditioner, characterized in that 3 ℃. A water level measurement step of measuring, by the plotter switch provided at one side of the second heat exchanger, an internal water level of any one of an inlet pipe and an outlet pipe for guiding the outflow / inflow of water; A flow sensing step of detecting whether water flows inside the second heat exchanger by a flow sensing means provided at one side of the second heat exchanger; A level comparison step of comparing, by the control unit, the measured level measured by the plotter switch with a set level; And The compressor is operated when the flow rate of the coolant flowing through the second heat exchanger is higher than or equal to a predetermined level according to the difference between the measured water level and the set water level measured in the water level comparison step and whether the water flow is detected by the flow sensing means. And stopping the operation of the compressor when the flow rate of the cooling water is less than a predetermined level. The method of claim 11, wherein The control unit is a control method of a water-cooled air conditioner, characterized in that for driving the compressor when the measured water level is above the set water level. The method of claim 11, wherein The flow detection step is a water-cooled air conditioning, characterized in that the cooling water pressure sensor or the cooling water temperature sensor provided on one side of the second heat exchanger to measure the water pressure or water temperature inside the water inlet and outlet pipe for guiding the outflow / intake of water Control method. The method of claim 13, The control unit is a control method of a water-cooled air conditioner, characterized in that the compressor is driven when the measured water level is above the set level, the pressure difference is less than the set pressure, or the water temperature difference is above the set temperature. The method of claim 13, The control unit, the control method of the water-cooled air conditioner, characterized in that the driving of the compressor is stopped when the water level is less than the set level, the water pressure difference is greater than the set pressure, or the water temperature difference is less than the set temperature. delete delete delete delete delete delete

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