KR20080019869A - Air conditioner - Google Patents

Abstract

An air conditioner is provided to enhance energy efficiency with a variable capacity compressor whose compression capacity is modified by load demand, by compressing refrigerant within one or more compression spaces. An air conditioner comprises at least one or more variable capacity compressors out of a plurality of compressors, wherein the variable capacity compressor has a plurality internal compression spaces(340',360') and a selectively variable capacity according to load demand. The variable capacity compressor comprises a casing(310), an electromotive mechanism(330), a compression mechanism(340,360), a vane(348,366), and a vane control unit(320). The casing contours an external appearance, having internal compression space. The electromotive mechanism rotates inside the casing to generate torque. The compression mechanism receives the torque from the lower side of the electromotive mechanism to compress refrigerant. The vane, provided inside the compression mechanism, divides a suction chamber from a compression chamber. The vane control unit supports the vane by supplying suction pressure or discharge pressure to a backside of the vane, while supplying discharge pressure to a lateral side of the vane, constrains or releases the vane by pressure difference supplied on the backside and lateral side of the vane, and allows the vane to make press-contact with a rolling piston(346,365) which compresses refrigerant, or to be spaced from the rolling piston.

Description

Air Conditioner {Air Conditioner}

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

Figure 2 is a bird's eye view showing a state in which an integrated water-cooled air conditioner employing an embodiment of the present invention is installed in a building.

Figure 3 is a schematic diagram showing the air flow inside the building when the integrated water-cooled air conditioner employing an embodiment of the present invention.

Figure 4 is a schematic view showing the air flow and the state installed in a multi-type water-cooled air conditioner employing another embodiment of the present invention in the building.

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

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

7 is a block diagram showing the flow of refrigerant and water during the cooling operation in the integrated water-cooled air conditioner according to an embodiment of the present invention.

Figure 8 is a longitudinal sectional view showing the internal configuration of a variable displacement compressor constituting the main portion in an integrated water-cooled air conditioner according to an embodiment of the present invention.

Figure 9 is a longitudinal sectional view showing an internal view of a variable capacity compressor constituting the main portion in the integral water-cooled air conditioner according to an embodiment of the present invention during normal operation.

10 is a block diagram showing the flow of the refrigerant and water in the integrated water-cooled air conditioner according to an embodiment of the present invention heating operation.

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

215. Refrigerant sprayer 216. Bacteria oil pipe

217. Compressor discharge temperature sensor 218. Oil separator

219. Oil return line 232. Check valve

240. Four-way valve 240 '. High pressure sensor

250. Hot gas pipe 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

290. Second heat exchanger 292. Intake pipe

293. Water outlet 294. Refrigerant entry

295. Coolant outlet 296. Coolant temperature sensor

298. Heat Exchanger Support 300. Compressor

300 '. Constant Speed Compressors 300 ". Capacity Variable Compressors

310. Casing 312.

320. Vane control unit 322. Common side connector

324. High Pressure Side Connectors 326. Low Pressure Side Connectors

328. Shields 330. Electric Mechanisms

332. Stator

336. Shaft 338. Eccentric

338 '. First eccentric 338 ". Second eccentric

340. First compression mechanism part 340 '. First compression space

342. First cylinder 344. Upper bearing

344 '. First Outlet 344 ". First Outlet Valve

345. Intermediate Bearings 346. First Rolling Piston

348. First Bain 348 '. 1st spring

349. First muffler 349 '. hole

360. 2nd compression mechanism part 360 '. 2nd compressed space

362. Second Cylinder 364. Lower Bearing

364 '. Pin insertion hole 365. Second rolling piston

366.2nd vane 368.2nd muffler

369. Second outlet 369 '. 2nd discharge valve

380. Capacity Variable Stage 382. Pin Section

384. Stoppers 386. Pin springs

 B. Building C. Cooling tower

 D. Duct H. Inlet

 R. Interior space. Confined space

The present invention relates to an air conditioner, and more particularly, to a water-cooled air conditioner having a variable capacity compressor having a plurality of compression spaces formed therein to improve energy efficiency.

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. Condenser, expansion valve, and multiplier to form a series of refrigerant cycles.

In recent years, in order to improve the quality of life and meet the demands of customers, in addition to air conditioning and heating, air polluting and filtering the polluted air in the room, making it into clean air, and returning it to the room, and making humid air 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 composed.

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 compressor 11 is applied to a constant speed compressor whose capacity is not variable, and is configured to consume the same power regardless of the large and small of the space required for air conditioning.

Therefore, there is a problem that the energy efficiency of the compressor 11 is lowered.

In addition, since the compressor 11 must continuously generate 100% of capacity while the water-cooled air conditioner is operating, there is a problem in that an overload occurs.

In addition, since the overload of the compressor 11 lasts for a long time, the compressor 11 may be burned out, and maintenance costs such as repair costs may be generated.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide an air conditioner having a capacity variable compressor having a plurality of compression spaces formed therein and varying the compression capacity according to the required load. have.

Another object of the present invention is to provide an air conditioner for improving energy efficiency by configuring a refrigerant to be compressed in at least one compression space among a plurality of compression spaces.

In the air conditioner according to the present invention for achieving the above object, at least one or more of the plurality of compressors for compressing the refrigerant is formed in a plurality of compression space therein, the capacity is selectively variable according to the required load An air conditioner having a variable compressor, wherein the variable displacement compressor comprises: a casing having an exterior and having a compression space therein; An electric mechanism part rotating inside the casing to generate a rotational force; A compression mechanism unit configured to compress the refrigerant by receiving a rotational force from the lower side of the electric mechanism unit; A vane provided inside the compression mechanism unit and partitioning the suction chamber and the compression chamber; By supplying a suction pressure or a discharge pressure to the back of the vane to support the vane, at the same time supplying the discharge pressure to the side of the vane, the pressure supplied to the back of the vane and the pressure supplied to the side of the vane The vane is constrained or released, the vane is characterized in that it comprises a vane control unit to be pressed or spaced apart from the rolling piston for compressing the refrigerant.

The compressor mechanism includes a first compression mechanism portion for compressing the refrigerant by receiving a rotational force from the lower side of the power mechanism portion, and a second compression mechanism portion for compressing the refrigerant with the rotation force transmitted from the power mechanism portion at the lower side of the first compression mechanism portion. And a first eccentric portion and a second eccentric portion formed to be eccentric in opposite directions to each other at one side of the first compression mechanism portion and the second compression mechanism portion.

The vane control unit may include a common side connection tube communicating with a first compression space formed inside the first compression mechanism part, a high pressure side connection tube communicating with a second compression space formed inside the second compression mechanism part, and the accumulator. Selectively shielding the low pressure side connecting tube to guide the refrigerant discharged from the common side connecting pipe and the high pressure side connecting pipe, and the refrigerant flowing through the low pressure side connecting pipe does not flow into the high pressure side connecting pipe. Characterized in that it comprises a shield.

On one side of the second compression mechanism portion, the variable variable stage for limiting the operation of the second compression mechanism portion by sliding in accordance with the pressure of the refrigerant introduced through the high-pressure side connection pipe to interfere with one side of the second compression mechanism portion. It is characterized by.

According to this invention which has such a structure, there exists an advantage that an energy efficiency improves.

Hereinafter, a preferred embodiment of the present invention as described above will be described in detail by taking a water-cooled air conditioner as an example.

2 is a bird's eye view showing an integrated water-cooled air conditioner adopting an embodiment of the present invention installed in a building, and FIG. 3 shows an air inside the building when the integrated water-cooled air conditioner employing an embodiment of the present invention is operated. A schematic showing the flow 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 closed 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 to be able 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 which heat-exchanges the refrigerant introduced through the refrigerant pipe 130 with water, and the duct D communicates the indoor side 100 with the indoor space R. .

In addition, the outdoor side 200 includes a compressor 300 and an accumulator (reference numeral 270 of FIG. 7), a second heat exchanger 290, an outdoor solenoid valve (reference numeral 234 of FIG. 7, 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 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. A common liquid pipe (reference numeral 132 in FIG. 7) serving as a pipe and a common engine (reference numeral 134 in FIG. 7) serving as a single pipe through which 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 the compressor 300 and the first heat exchanger 120. Is 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 300 for compressing a refrigerant at a high temperature and high pressure therein, and a refrigerant introduced from the compressor 300 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 for exchanging water and refrigerant with each other, and the circulation of the refrigerant and 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 integral water-cooled air conditioner employing an embodiment of the present invention, Figure 6 is an integral water-cooled air conditioner in which an embodiment of the present invention is adopted The exploded perspective view showing the internal configuration of the outdoor side constituting the main portion is shown, Figure 7 is a block diagram showing the flow of refrigerant and water during the cooling operation in the integrated water-cooled air conditioner according to an embodiment of 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 external appearance is formed by the front panel 205 and the rear panel 207, respectively, and the side panel 208 forming the left / right side appearance and the base fan 209 supporting a plurality of components.

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 and rear ends of the front panel 205 are provided so that the front end of the side panel 208 is in contact with each other, and the heat generated during the operation of the compressor 300 is at the top of the side panel 208. 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 a load of a plurality of parts, and the compressor 300 is provided at the center of the upper surface of the base fan 209.

The compressor 300 is to be a high temperature and high pressure by compressing the refrigerant, it is provided on the left / right respectively. That is, the compressor 300 is installed on the right side of the constant speed compressor 300 'for constant speed operation, and is installed on the left side of the constant speed compressor 300' and has a plurality of compression spaces formed therein so that the capacity is variable. It is configured to include a variable displacement compressor (300 ").

Accordingly, when the load applied to the compressor 300 is small, the variable capacity compressor 300 ″ is operated first, and when the capacity of the compressor is gradually increased so that only the capacity variable compressor 300 ″ cannot handle the constant speed, the constant speed is achieved. The compressor 300 'is activated.

Since the constant speed compressor 300 'is the same as that of a scroll compressor which is generally used, a detailed description thereof will be omitted, and the capacity variable compressor 300 ″ will be described in detail below as a main component of the present invention. .

The refrigerant injector 215 is installed at the inlet side of the compressor 300. The refrigerant injector 215 is to prevent the burnout by supplying a refrigerant when the compressor 300 is overheated according to the operating conditions, the refrigerant used here is used by the refrigerant discharged from the second heat exchanger (290) It is preferably configured to.

A constant oil compressor 216 is installed between the constant speed compressor 300 ′ and the variable displacement compressor 300 ″ so that the constant speed compressor 300 ′ and the variable capacity compressor 300 ″ communicate with each other. Therefore, when oil supply shortage occurs in one of the compressors 300 'and 300 ", the compressor 300 is replenished from the other compressor to prevent the compressor 300 from being burned due to the flow rate shortage.

The compressor discharge temperature sensor 217 and the oil separator 218 for measuring the temperature of the refrigerant discharged from the compressor 300 are provided at the outlet side of the compressor 300, respectively. The oil separator 218 filters the oil mixed in the refrigerant discharged from the compressor 300 to be recovered to the compressor 300.

That is, oil used to cool the frictional heat generated when the compressor 300 is driven is discharged to the outlet of the compressor 300 together with the refrigerant. The oil in the refrigerant is separated from the oil separator 218. By returning to the compressor 300 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 300 ′ or the capacity variable compressor 300 ″ is operated, the compressed refrigerant is not flowed 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 300 (or an oil separator 218), an inlet of the compressor 300 (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 300 ′ and the capacity variable compressor 300 ″ are collected in one place and then flow into the four-way valve 240. The compressor 300 is provided at the inlet of the four-way valve 240. A high pressure sensor 240 'is installed to check the pressure of the refrigerant discharged from

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 the operation of the air conditioner, the high pressure refrigerant at the discharge port side of the compressor 300 may be directly supplied to the inlet side of the compressor 300. 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 on the left side of the base pan 209, that is, on the left side of the capacitive variable compressor 300 ". To get into

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 flowing into the compressor 300, the compressor 300 forms the refrigerant as a high-temperature, high-pressure gas state refrigerant. The load is increased to cause damage to the compressor (300).

Therefore, among the refrigerants introduced into the accumulator 270, the refrigerant remaining in the liquid phase without being evaporated is stored at 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 300 Flows into).

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 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 pipe and the refrigerant flow pipe 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 portion 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.

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.

A heat exchanger support 298 is provided below the second heat exchanger 290. The heat exchanger support 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, a configuration of the capacitive variable compressor 300 ″, which is a main component of the present invention briefly mentioned above, will be described in detail with reference to FIG. 8.

8 is a longitudinal sectional view showing an internal configuration of a capacity variable compressor, which is a main component of a water-cooled air conditioner according to the present invention.

As shown in the figure, the capacitively variable compressor 300 ″ has an exterior formed by a casing 310 forming a plurality of compression spaces 340 ′ and 360 ′ therein, and an upper surface of the casing 310. A gas discharge pipe 312 is formed in the gas discharge pipe 312, and has a lower end communicating with the casing 310 and the other end communicating with the four-way valve 240.

The lower right side surface of the casing 310 has a common side connecting pipe 322 for guiding the refrigerant inflow into the variable displacement compressor (300 "), and a high pressure for guiding the inflow of oil into the capacity variable compressor (300"). A side connection pipe 324 and a low pressure side connection pipe 326 for guiding the gas refrigerant discharged from the accumulator 270 to the capacitive variable compressor 300 " are provided. The side connection pipe 324 and the low pressure side connection pipe 326 are configured to selectively communicate with each other as a component of the vane control unit 320.

That is, the vane control unit 320 is further provided with a shielding portion 328 for selectively shielding the high-pressure side connecting pipe 324 by sliding in the vertical direction, the shielding portion 328 is shown in FIG. At the same position as 8, the common side connecting pipe 322, the high pressure side connecting pipe 324, and the low pressure side connecting pipe 326 are in communication with each other.

When the shield 328 flows downward and is positioned inside the high pressure side connecting tube 324 (see FIG. 9), the low pressure side connecting tube 326 is connected to the common side connecting tube 322. Communicating.

On the other hand, the power mechanism 330 is provided inside the upper half of the casing (310). The power mechanism 330 generates a rotational force for compressing the refrigerant, and is disposed at regular intervals inside the stator 332 to which power is applied from the outside, and the stator 332 and the stator 332. It comprises a rotor 334 that rotates while interacting, and a rotating shaft 336 inserted into the center of the rotor 334 to guide the rotation of the rotor 334.

The rotation shaft 336 is formed deeper than the height of the rotor 334 to protrude downward from the lower end of the rotor 334 by a predetermined length, and has a rotational movement below the rotation shaft 336. An eccentric portion 338 for converting the linear motion is provided.

The eccentric portion 338 is configured to include a first eccentric portion 338 ′ relatively formed on the upper side and a second eccentric portion 338 ″ spaced below the first eccentric portion 338 ′. The first eccentric portion 338 ′ and the second eccentric portion 338 ″ are fixed to the rotation shaft 336 in a state of being eccentric in different directions.

A first compression mechanism part for compressing the refrigerant by the rotational force transmitted to the rotation shaft 336 around the lower portion of the rotation shaft 336, more specifically, around the first eccentric portion 338 'and the second eccentric portion 338 "( 340 and the second compression mechanism 360 is further provided.

The first compression mechanism 340 is located relatively higher than the second compression mechanism 360, and the second compression mechanism 360 selectively compresses the refrigerant to vary the capacity of the variable displacement compressor 300 ″. To be possible.

The first compression mechanism 340 is configured to form a first compression space 340 ′ by shielding an upper / lower side of the first cylinder 342 and an upper / lower side of the first cylinder 342 having a large perforated interior. A first rolling piston 346 attached to an upper bearing 344 and an intermediate bearing 345 and attached to an outer circumferential surface of the first eccentric portion 338 'and compressing a refrigerant in the first compression space 340'; And a first vane 348 partitioning the first compression space 340 'into a first suction chamber (not shown) and a first compression chamber (not shown).

A first spring 348 'is provided on the right side of the first vane 348 to be elastically supported, and a first discharge port 344' is formed by penetrating the upper and lower portions of the upper bearing 344. The upper end of the first discharge port 344 'is provided with a first discharge valve 344 "for adjusting the discharge amount of the refrigerant compressed in the first compression space 340'. The first muffler 349 is coupled to the upper bearing 344 to form a space.

In addition, the first muffler 349 is formed with a hole 349 'bored so that the lower refrigerant flows upward. Therefore, the refrigerant compressed in the first compression space 340 'flows upward through the first discharge port 344' and flows into the first muffler 349, and inside the first muffler 349. The refrigerant introduced into the air flows upward through the hole and is discharged to the outside of the capacity variable compressor (300 ") through the gas discharge pipe (312).

On the other hand, a second compression mechanism 360 is provided below the first compression mechanism 340. The second compression mechanism part 360 is a place where the refrigerant flowing from the accumulator 270 communicates with the common side connection pipe 322 described above and flows in the first place. The configuration of the first compression mechanism part 340 Similar and formed around the second eccentric 338 ".

That is, the second compression mechanism 360 includes a second cylinder 362 that performs the same role as the first cylinder 342, and is provided below the second cylinder 362 together with the intermediate bearing 345. A lower bearing 364 forming the second compression space 360 ', a second rolling piston 365 compressing the refrigerant, and a second suction chamber (not shown); The second vane 366 partitioned into a second compression chamber (not shown), the second muffler 368 coupled to the lower side of the lower bearing 364 and the lower bearing 364 are punched to form a second compression space. And a second discharge port 369 and a second discharge valve 369 'for guiding the flow of the refrigerant compressed at 360'.

Therefore, the refrigerant introduced into the second compression space 360 'is compressed by the rotational movement of the second rolling piston 365 and then through the second discharge port 369, the second compression space 360'. It is discharged to the outside.

On the other hand, a capacity variable stage 380 is provided on the right side of the second discharge port 369 to selectively vary the capacity of the variable displacement compressor 300 ″. The capacity variable stage 380 includes a second vane ( 366) to restrain the capacity of the variable displacement compressor 300 "by selectively restraining the second compression mechanism 360 from operating.

That is, a pin insertion hole 364 ', which is drilled up and down, is formed at the right side of the lower bearing 364, and the capacitive variable end 380 is installed at the pin insertion hole 364'.

In more detail, the capacitance variable stage 380 is formed with an outer diameter corresponding to the pin insertion hole 364 ′, and is disposed at a lower end of the pin portion 382 and a lower end of the pin portion 382. And a stopper piece 384 coupled in a direction to limit the upward sliding range of the pin portion 382 and a pin spring 386 generating an elastic force on the upper side of the stopper piece 384.

The pin spring 386 is applied to the compression spring is configured to elastically support the upper surface of the stopper piece 384 in the downward direction. Therefore, when the refrigerant flows into the lower side of the second compression mechanism 360 through the high-pressure side connecting pipe 324, pressure is generated on the upper side of the second muffler 368, so that the pin portion 382 is upward. To flow.

In addition, the upper end of the pin portion 382 maintains the state inserted in the recessed portion recessed upwardly on the bottom surface of the second vane 366 so that the second compression mechanism portion 360 is not operated and is constrained. The compressor 300 ″ operates only the first compression mechanism 340.

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 longitudinal cross-sectional view showing the internal appearance of the variable capacity compressor that constitutes the main portion in the integrated water-cooled air conditioner according to an embodiment of the present invention, Figure 10 is a water-cooled air conditioner according to the present invention The configuration diagram showing the flow of the refrigerant and water during the heating operation is shown.

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 and then the four-way 2 is entered into the accumulator 270 through the outlet port 246. The gas refrigerant exiting the accumulator 270 is introduced into the compressor 300.

In this case, the compressor 300 operates the constant speed compressor 300 ′ and the variable capacity compressor 300 ″ simultaneously or only the capacity variable compressor 300 ″ according to the amount of refrigerant required for air conditioning. When the capacity variable compressor (300 ") can afford enough, the capacity variable stage (380) is used to control the capacity of the capacity variable compressor (300").

That is, assuming that the capacity of the first compression space 340 ′ is composed of 50% of the capacity of the variable displacement compressor 300 ″, the capacity of the first compression mechanism 340 can be adequately handled. The shield 328 is positioned above the vane control unit 320 as shown in FIG. 8, and the low pressure side connection tube 326 is connected to the common side connection tube 322 and the high pressure side connection tube 324. Communicate.

At this time, the refrigerant discharged from the accumulator 270 is to the right space of the second vane 366 and the lower space of the second muffler 368 through the common side connection pipe 322 and the high-pressure side connection pipe 324. Inflow.

In addition, the refrigerant introduced into the common side connecting pipe 322 pushes the second vane 366 to the left side, and the fin portion 382 is upward by the refrigerant pressure introduced through the high pressure side connecting pipe 324. As shown in FIG. 8, the second vane 366 is restrained to operate only the first compression mechanism part 340.

If the variable displacement compressor (300 ") is to generate a capacity of 100%, the shield 328 is to slide in the downward direction is located inside the high-pressure side connection pipe (324).

At this time, the high-pressure side connection pipe 324 is shielded by the shielding portion 328, the refrigerant flow is blocked, the refrigerant discharged from the accumulator 270 is the second vane through the common side connection pipe 322 The right side of 366, that is, flows into the second compression space 360 ′.

Since the second compression space 360 ′ is configured to communicate with the first compression space 340 ′, the refrigerant introduced into the second compression space 360 ′ may flow into the first compression space 340 ′. The first rolling piston 346 and the second rolling piston 365 compress the refrigerant at different positions when the rotating shaft 336 rotates, so that the capacity variable compressor 300 ″ may generate a capacity. 100% of the time.

The refrigerant compressed by the compressor 300 through the above process is discharged to the outside through the gas discharge pipe 312 and passes through the oil separator 218. In the oil separator 218, oil contained in the refrigerant is separated and recovered to the compressor 300 through the oil recovery pipe 219.

That is, as the refrigerant is compressed in the compressor 300, 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.

For this purpose, it is obvious that the oil return pipe 219 should be installed to communicate with the high pressure side connection pipe 324.

On the other hand, the oil inside the compressor 300 on both sides is balanced by the homogenizing pipe 216 connecting the constant speed compressor 300 ′ and the capacity variable compressor 300 ″.

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 refrigerant in the liquid state that has not been evaporated is filtered out, and only the refrigerant in the gas state is selected and supplied to the compressor 300. One cooling cycle is completed through the above process.

Referring to the arrow shown in Figure 10 looks at the flow of the refrigerant and water when the water-cooled air conditioner is operating in the heating mode.

The refrigerant compressed from the compressor 210 flows along the common engine 134 and flows into the indoor side 100, and the refrigerant introduced into the indoor side 100 passes through the inside of the first heat exchanger 120. Heat exchange with outdoor air.

The refrigerant heat-exchanged with the first heat exchanger 120 is introduced into the outdoor side 200 through the outdoor liquid pipe 262, and then heat exchanged with water while passing through the second heat exchanger 290.

The heat exchanged refrigerant passes through the four-way outlet port 244 and the four-way outlet port 246 in order to complete the heating cycle while passing through the accumulator 270.

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, the compressor is composed of a constant speed compressor and a variable capacity compressor, but, if necessary, a plurality of compressors may be all configured as a variable capacity compressor.

In the water-cooled air conditioner according to the present invention as described in detail above, a capacity variable compressor having a plurality of compression spaces therein is provided.

Therefore, since the capacity of the compressor can be adjusted according to the size of the space where air conditioning is required, the energy efficiency is improved.

In addition, since the load on the compressor is reduced when the water-cooled air conditioner is used for a long time, the damage of the compressor is prevented in advance.

In addition, since the ease of use is improved, the user is also expected to improve product satisfaction.

Claims (4)

At least one or more of the plurality of compressors for compressing the refrigerant is provided with a plurality of compression space therein, the air conditioner is provided with a variable capacity compressor to selectively vary the capacity according to the required load; The capacity variable compressor, A casing forming an exterior and having a compression space therein; An electric mechanism part rotating inside the casing to generate a rotational force; A compression mechanism unit configured to compress the refrigerant by receiving a rotational force from the lower side of the electric mechanism unit; A vane provided inside the compression mechanism unit and partitioning the suction chamber and the compression chamber; By supplying a suction pressure or a discharge pressure to the back of the vane to support the vane, at the same time supplying the discharge pressure to the side of the vane, the pressure supplied to the back of the vane and the pressure supplied to the side of the vane And a vane control unit configured to allow the vane to be restrained or released, and the vane to be pressed or spaced from the rolling piston compressing the refrigerant. The method of claim 1, wherein the compression mechanism portion, A first compression mechanism part configured to compress the refrigerant by receiving a rotational force from the lower side of the electric mechanism part; It comprises a second compression mechanism for compressing the refrigerant by the rotational force transmitted from the power mechanism in the lower side of the first compression device, Inside one side of the first compression mechanism portion and the second compression mechanism portion, An air conditioner, characterized in that the first eccentric portion and the second eccentric portion formed to be eccentric in a direction opposite to each other. The method of claim 1, wherein the vane control unit, A common side connecting pipe communicating with a first compression space formed inside the first compression mechanism part; A high pressure side connecting tube communicating with a second compression space formed inside the second compression mechanism part; A low pressure side connecting pipe for guiding the refrigerant discharged from the accumulator to flow into the common side connecting pipe and the high pressure connecting pipe; And a shield for selectively shielding the refrigerant flowing through the low pressure side connection pipe from being introduced into the high pressure side connection pipe. According to claim 2, One side of the second compression mechanism portion, And a capacity variable stage for limiting the operation of the second compression mechanism part by sliding in accordance with the pressure of the refrigerant introduced through the high pressure side connection pipe to interfere with one side of the second compression mechanism part.

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