KR20190092989A - Air conditioning system - Google Patents

Abstract

According to the present invention, in an air conditioning system including a hot water supply device for providing hot water, the hot water supply device comprises: a hot water supply housing in which a heat medium is stored in a cold portion; a first heat exchange unit disposed above the inside of the hot water supply housing and configured to circulate water; and a second heat exchange unit disposed under the inside of the hot water supply housing and configured to circulate a refrigerant. The first and second heat exchange units are spaced apart from each other, wherein the second heat exchange unit heat-exchanges the refrigerant and the heat medium in a liquid state to evaporate the heat medium in a liquid state, and the first heat exchange unit heat-exchanges the water and the heat medium in a gaseous state to condense the heat medium in a gaseous state. According to the present invention, the air conditioning system can heat the water by circulating the heat medium of a hot water supply heat exchanger in a thermosiphon method.

Description

Air conditioning system

The present invention relates to an air conditioning system, and more particularly, to an air conditioning system for circulating a heat medium in a thermosiphon manner to provide hot water.

In general, an air conditioner is composed of a compressor, a condenser, an evaporator, and an expander, and uses an air conditioning cycle to supply cold or warm air to a building or a room. In general, an air conditioner operates a refrigerant in a refrigeration cycle or a heat pump cycle.

Air conditioners are structurally divided into a separate type in which the compressor is arranged outdoors and an integrated type in which the compressor is manufactured integrally.

In the separate type, an indoor heat exchanger is installed in an indoor unit, and an outdoor heat exchanger and a compressor are installed in an outdoor unit to connect two separated devices with refrigerant pipes.

The integrated type is an indoor heat exchanger, outdoor heat exchanger and compressor installed in one case.

An integrated air conditioner includes a window type air conditioner installed by directly hanging a device on a window, and a duct type air conditioner connected to an intake duct and a discharge duct and installed outside the room.

The separate type air conditioner includes a stand type air conditioner installed upright and a wall-mounted air conditioner installed on a wall.

In particular, there is a system in which an air conditioner cools or heats water to provide a user by using heat generated in a circulation process of a refrigerant.

The conventional hot water heat exchanger heats the high temperature refrigerant and the low temperature water to raise the low temperature water to a predetermined temperature.

As described in the Republic of Korea Patent Registration 10-1543750 B1, the conventional hot water heat exchanger is a plate heat exchanger is used, the heat medium and the circulating water is a structure that heat exchange with each other in the plate heat exchanger. However, when leakage occurs in the plate heat exchanger, there is a problem that the circulation water provided to the user is contaminated.

Republic of Korea Patent Registration 10-1543750 B1

An object of the present invention is to provide an air conditioning system having a structure in which water and a refrigerant do not directly contact when hot water is provided.

It is an object of the present invention to provide an air conditioning system capable of detecting leakage of refrigerant or water in a hot water supply housing.

An object of the present invention is to provide an air conditioning system for circulating a heat medium in a thermosyphon method to provide hot water.

An object of the present invention is to provide an air conditioning system capable of storing waste heat of an outdoor unit through a showcase apparatus, a cooling tower apparatus, or an ice storage apparatus when operating a hot water supply apparatus.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

The air conditioning system according to the present invention can heat the water by circulating the heat medium in the thermosiphon method of the heat medium of the hot water supply heat exchanger.

In the air conditioning system including a hot water supply device for providing hot water according to the present invention, the hot water supply apparatus, the hot water supply housing that the heat medium is stored in the cold portion; A first heat exchanger disposed at an upper side of the hot water supply housing and configured to circulate water; And a second heat exchanger disposed at a lower side of the hot water supply housing and configured to circulate a refrigerant, wherein the first heat exchanger and the second heat exchanger are spaced apart from each other, and the second heat exchanger is heated in the liquid state and the liquid state. Heat exchange to evaporate the liquid heat medium in the liquid state, and the first heat exchange unit heat-exchanges the water and gaseous heat medium to condense the gaseous heat medium.

The hot water supply device, a hot water compressor for compressing the refrigerant; A first hot water heat exchanger condensing the compressed refrigerant; Hot water expansion valve for expanding the refrigerant condensed by the first hot water heat exchanger; Hot water supply heat exchanger for evaporating the refrigerant expanded by the hot water expansion valve; A hot water tank connected to the first hot water heat exchanger to circulate water, and storing hot water heated by heat exchange with the first hot water heat exchanger; A first hot water pipe and a second hot water pipe connecting the hot water tank and the first hot water heat exchanger; A hot water pump disposed in the hot water supply pipe and circulating water between the hot water tank and the first hot water heat exchanger; A first refrigerant pipe connecting the hot water compressor and the first hot water heat exchanger to flow a refrigerant; And a second refrigerant pipe connecting the first hot water heat exchanger and the hot water expansion valve to flow the refrigerant, wherein the first hot water heat exchanger includes the hot water housing, the first heat exchange part, the second heat exchange part, and the heat medium. The hot water supply tank may be connected to the first heat exchange part, and the hot water compressor and the hot water expansion valve may be connected to the second heat exchange part.

The hot water supply housing may include a first hot water supply connection valve and a second hot water supply connection valve connected to the first hot water supply pipe and the second hot water supply pipe, respectively; And a first refrigerant connection valve and a second refrigerant connection valve connected to the first refrigerant pipe and the second refrigerant pipe, respectively.

The first heat exchange part may be formed by rolling a pipe in a cylindrical shape.

The second heat exchange part may be formed by rolling a pipe in a cylindrical shape.

The pipe length direction of the first heat exchange part may be disposed in a gravity direction.

The minimum level of the heat medium may be formed so that at least a portion of the second heat exchange part is submerged.

The first heat exchange part may be located above the water surface of the heat medium, and the second heat exchange part may be located below the water surface of the heat medium.

When the heat medium forms the maximum water level, the water surface of the heat medium may be spaced apart from the first heat exchange part and positioned below the first heat exchange part.

When the heat medium forms the maximum water level, a portion of the second heat exchange part may be exposed on the water surface of the heat medium.

Hot water heat exchanger of the air conditioning system according to the present invention has one or more of the following effects.

First, the air conditioning system according to the present invention has the advantage of heating the water by circulating the heat medium in the thermosiphon method of the heat medium of the hot water supply heat exchanger.

Second, the air conditioning system according to the present invention can store the heat amount inside the hot water heat exchanger through the heat medium, thereby ensuring a sufficient heat amount for heating the water, there is an advantage that can minimize the energy that is wasted by waste heat have.

Third, since the heat exchanger for hot water supply of the air conditioning system according to the present invention separates the refrigerant pipe and the hot water supply pipe, there is an advantage that the refrigerant is contained in the hot water provided to the user.

Fourth, the air conditioning system according to the present invention has a merit that the heat can be transferred in a thermosiphon method because the first hot water heat exchanger fills only the second heat exchanger instead of filling the heat medium.

1 is a block diagram of a refrigeration and refrigeration air conditioning system according to a first embodiment of the present invention.
FIG. 2 is a partially cutaway perspective view illustrating the inside of the hot water supply housing shown in FIG. 1.
3 is a block diagram showing a refrigerant flow when operating the mart shown in FIG.
FIG. 4 is a diagram illustrating a refrigerant flow when the mart is not operated and there is no hot water load in FIG. 1.
FIG. 5 is a diagram illustrating a refrigerant flow when there is no mart and hot water load in FIG. 1.
6 is a partially cutaway perspective view showing the inside of the hot water supply housing according to the second embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

1 is a block diagram of a refrigeration and refrigeration air conditioning system according to a first embodiment of the present invention, Figure 2 is a partially cutaway perspective view showing the interior of the hot water supply housing shown in FIG.

Referring to the drawings, the refrigeration and refrigeration air conditioning system according to the present embodiment includes an outdoor unit 100, a hot water supply device 200, a cooling tower device 300, a cold storage device 400 and a showcase device 500.

<Configuration of outdoor unit>

The outdoor unit 100 includes an outdoor compressor 101, a first outdoor heat exchanger 110, a second outdoor heat exchanger 120, a first three-way valve 130, a second three-way valve 140, and a second outdoor expansion. The valve 150 and the first outdoor expansion valve 160 is included.

The outdoor compressor 101 compresses the first refrigerant, and the compressed first refrigerant flows to the first three-way valve 130. In the present embodiment, the first refrigerant is R143a.

The first three-way valve 130 may select and flow the first refrigerant compressed by the outdoor compressor 101 to either the first outdoor heat exchanger 110 or the hot water supply device 200. To this end, the first three-way valve 130 is connected to the outdoor compressor 101, the first outdoor heat exchanger 110, and the hot water supply device 200 by a refrigerant pipe.

The second three-way valve 140 may receive the first refrigerant passing through the first outdoor heat exchanger 110, and select one of the second outdoor heat exchanger 120 or the showcase apparatus 500 to flow it. have. To this end, the second three-way valve 140 is connected to the first outdoor heat exchanger 110, the second outdoor heat exchanger 120, and the showcase apparatus 500 by a refrigerant pipe.

The first outdoor heat exchanger 110 may be operated as a condenser to condense the first refrigerant, and the second outdoor heat exchanger 120 may be operated as an evaporator to evaporate the first refrigerant.

The second outdoor expansion valve 150 is installed in the pipe connected to the outdoor compressor 101 in the showcase device 500, the first outdoor expansion valve 160 is the second outdoor heat exchange in the second three-way valve 140 Installed in the pipe connected to the machine (120).

Check valves 103 and 104 for restricting the flow direction of the refrigerant may be disposed in the pipe of the outdoor unit 100.

<Configuration of hot water supply device>

The hot water supply device 200 is a hot water supply compressor 201, the first hot water heat exchanger 210, the second hot water heat exchanger 220, hot water expansion valve 230, hot water tank 240, hot water pump 250 Include.

The hot water supply device 200 circulates the second refrigerant. In the present embodiment, R143a is used as the second refrigerant. Unlike the present embodiment, the second refrigerant may be a different type of refrigerant from the first refrigerant. For example, R134a or R410a may be used as the second refrigerant.

Since the hot water supply device 200 is for providing hot water to the user, it is preferable to use a refrigerant that emits a high temperature during condensation.

The second refrigerant compressed in the hot water supply compressor 201 is condensed in the first hot water heat exchanger 210, expanded in the hot water expansion valve 230, and then evaporated in the second hot water heat exchanger 220. .

The first refrigerant and the second refrigerant are heat-exchanged in the second hot water heat exchanger 220. The second hot water heat exchanger 220 is operated not only as a condenser of the outdoor unit 100 but also as an evaporator of the hot water supply device 200. Thus, the second refrigerant may be evaporated by the heat of condensation of the first refrigerant.

Hot water supply pipes 241 and 242 connecting the hot water supply tank 240 and the first hot water heat exchanger 210 are disposed, and the hot water supply pump 250 is disposed in any one of the hot water supply pipes 241 and 242. do. The hot water pump 250 circulates water in the hot water tank 240, and the first hot water heat exchanger 210 exchanges heat with the water circulated and heats the water circulated.

In this embodiment, the hot water tank 240 is disposed to store water, but unlike the present embodiment, water may not be stored. That is, the hot water valve 245 may be directly connected to the hot water supply pipes 241 and 242.

When the hot water tank 240 is provided, the water stored therein may be maintained at a predetermined temperature, and hot water may be immediately supplied through the hot water valve 245 when the user desires it. If the hot water tank 240 is not provided, a delay may occur until hot water is supplied through the hot water supply pipes 241 and 242.

The first hot water heat exchanger 210 is connected to the hot water supply housing 212 formed to be sealed to the outside, the heat medium 211 stored inside the hot water supply housing 212, and the hot water supply pipes 241 and 242. A first heat exchanger 260 for circulating water and a second heat exchanger 270 connected to the hot water compressor 201 and the hot water expansion valve 230 to circulate the second refrigerant.

The hot water supply housing 212 is disposed upright in the vertical direction, and a space in which the heat medium 211 is stored is formed in the inside 213. The hot water housing 212 is a sealed container.

The hot water supply housing 212 is not limited in shape, but is preferably formed long in the direction of gravity.

The first heat exchanger 260 and the second heat exchanger 270 are disposed in the gravity direction in the hot water supply housing 212.

The first heat exchanger 260 and the second heat exchanger 270 are manufactured in a structure capable of flowing a fluid, and in this embodiment, a pipe is formed.

In the present embodiment, the first heat exchanger 260 and the second heat exchanger 270 are manufactured by rolling a pipe in a cylindrical shape. The first heat exchanger 260 and the second heat exchanger 270 may be manufactured in various shapes.

For example, the first heat exchanger 260 and the second heat exchanger 270 may be manufactured in a spiral shape or zigzag shape.

In particular, the first heat exchange part can be easily gathered to the lower end by making the longitudinal direction of the pipe to the lower side. In addition, a plurality of protrusions may be formed on the surface of the first heat exchange part in which the heat medium is condensed, and a water repellent coating may be formed to lower the surface tension of the heat medium.

In the present embodiment, the first heat exchanger 260 is located above, and the second heat exchanger 270 is located below. This is a structural arrangement for condensing the heat medium in the first heat exchange unit 260 and evaporating the heat medium in the second heat exchange unit 270.

The heat medium 211 may be evaporated or condensed in the hot water supply housing 212. The heat medium 211 in a liquid state may be evaporated by heat exchange with a refrigerant flowing through the second heat exchange part 270. The heat medium 211 in a gas state may be condensed by exchanging heat with the first heat exchanger 260. The refrigerant condensed in the first heat exchanger 260 flows into the lower side of the hot water supply housing 212 and is stored in a liquid state.

The heat medium 211 is circulated in the thermosiphon method. Thermomosiphon is a passive heat exchange based on natural convection that circulates fluid without the need for a mechanical pump.

Rather than filling the first hot water heat exchanger 212 with the heat medium 211, it is more efficient to fill only the second heat exchanger 270 as described in the present embodiment and transfer heat in a thermosiphon method.

In the present embodiment, the heat medium 211 is water. Unlike the present embodiment, the heat medium 211 may use ethanol, methanol, acetone, or the like. The type of heat medium 211 may be selected according to the water temperature required by the second refrigerant and the hot water supply tank 240.

The first hot water heat exchanger 210 according to the present embodiment may store a large amount of heat supplied from the second refrigerant because the heat medium 211 is stored therein. When a large amount of heat is stored in the first hot water heat exchanger 210 through the heat medium 211, a sufficient amount of heat may be provided to the first heat exchanger 260, and energy that is discarded as waste heat may be minimized. have.

The condensed heat medium 211 may flow along the surface of the first heat exchange part 260 in the form of a pipe and fall to the surface of the heat medium 211.

The bracket 214 may be disposed to fix the first heat exchange part 260. One end of the bracket 214 is fixed to the hot water supply housing 212 and the other end of the bracket 214 is fixed to the first heat exchange part 260.

In addition, brackets 214 and 215 may be disposed to fix the second heat exchange part 270. One end of the brackets 214 and 215 is fixed to the hot water supply housing 212, and the other end of the brackets 214 and 215 is fixed to the second heat exchange part 270.

Two brackets 214 and 215 are used to fix the first heat exchanger 260. One is coupled to an upper side of the first heat exchanger 260, and the other is coupled to a lower side of the first heat exchanger 260.

The second heat exchanger 270 is also fixed to the hot water supply housing 212 by two brackets 214 and 215 similarly to the first heat exchanger 260.

The first heat exchange part 260 includes a first heat exchange part inlet pipe 261 connected to the hot water supply pipes 241 and 242, and a first heat exchange part outlet pipe 262.

The hot water supply pipe is defined as a first hot water supply pipe 241 and a second hot water supply pipe 242, and the first hot water supply pipe 241 supplies water to the first heat exchange part 260, and the second hot water supply pipe is provided. The pipe 242 supplies the water of the first heat exchanger 260 to the hot water tank 240.

The second heat exchange part 270 includes a second heat exchange part inlet pipe 271 connected to the refrigerant pipes 202 and 204, and a second heat exchange part outlet pipe 272.

The refrigerant pipe is defined as a first refrigerant pipe 202 and a second refrigerant pipe 204, and the first refrigerant pipe 202 supplies a refrigerant to the second heat exchange unit 270, and the second refrigerant The pipe 204 supplies the refrigerant of the second heat exchange part 270 to the hot water expansion valve 230.

The hot water supply housing 212 is provided with connection valves 216, 217, 218, and 219 for connecting internal pipes and external pipes.

The connection valves 216, 217, 218, and 219 may include a first hot water supply connection valve 216 connecting the first heat exchange part inlet pipe 261 and the first hot water supply pipe 241, and a first heat exchange part. First refrigerant connection connecting the second hot water supply connection valve 217 connecting the outlet pipe 262 and the second hot water supply pipe 242 and the second heat exchange part inlet pipe 271 and the first refrigerant pipe 202. And a second refrigerant connection valve 219 connecting the valve 218 to the second heat exchange part outlet pipe 272 and the second refrigerant pipe 204.

On the other hand, the first hot water heat exchanger 210 may be a water level sensor 280 for detecting the water level of the heat medium 211 stored therein. Considering that the first hot water heat exchanger 210 is a sealed structure, the water level sensor 280 is preferably a mechanism for detecting the water level of the heat medium 211 through a capacitive method.

Unlike the present embodiment, a float level sensor may be used.

When the level sensor 280 of the capacitive type is used, it is possible to finely detect the change in the water level of the heat medium, through which the amount of the heat medium 211 evaporated can be calculated.

For example, the hot water supply housing 212 is in a sealed state, and a predetermined amount of heat medium is stored, and thus may be determined as "maximum level-detected water level = evaporated heat medium".

Thus, when the external temperature is low, the amount of the evaporated heat medium may be insufficient even if the heat is supplied from the second heat exchanger 270. At this time, the amount of heat supplied to the second heat exchange part 270 may be calculated based on the sensed water level of the heat medium.

That is, when the water level of the heat medium is less than the target value, the operation frequency of the hot water supply compressor 201 may be increased to supply more second refrigerant, and the water level of the hot water supply housing 212 may be controlled to be lowered to the target water level. have. The heat medium evaporated by the lowered water level may increase, and a sufficient amount of heat may be provided to the first heat exchanger 260.

In addition, when the capacitive water level sensor 280 is used, it is possible to finely detect the change in the water level of the heat medium, through which it is possible to determine whether the hot water supply housing 212 is sealed.

When the hot water supply device 200 is not operated for a predetermined time, the inside of the hot water supply housing 212 is stabilized. At this time, when the level of the detected heat medium is lower than the leak determination reference value, leakage of the hot water supply housing 212 may be suspected, thereby generating an error code.

In addition, when the capacitive water level sensor 280 is used, it is possible to finely detect the change in the water level of the heat medium, through which the leakage from the first heat exchanger 260 or the second heat exchanger 270 is also detected. You can judge.

Contrary to the above, when the hot water supply device 200 is not operated for a predetermined time, the hot water supply housing 212 is stabilized. At this time, when the level of the detected heat medium is higher than the maximum level, a leak in the first heat exchanger 260 or the second heat exchanger 270 may be suspected, and thus an error code may be generated.

In the present embodiment, the entire second heat exchanger 270 is disposed to be immersed in the heat medium. In particular, even if the heat medium evaporates to form a minimum level, the upper end of the second heat exchange part 270 is not exposed above the water surface.

In addition, when the heat medium 211 forms the maximum water level, the maximum water level of the heat medium 211 is spaced apart from the lower end of the first heat exchange part 260. That is, the first heat exchange part 260 is not immersed in the liquid heat medium.

<Configuration of Cooling Tower Unit>

The cooling tower device 300 is a cooling tower 340 for storing water, cooling tower pipes 341 and 342 connecting the first outdoor heat exchanger 110 and the cooling tower 340 and circulating water, and the Cooling tower pipes 341 and 342 are installed in the cooling tower pump 350 for circulating the water.

Water circulated through the cooling tower device 300 may exchange heat with the first outdoor heat exchanger 110 operated as a condenser, and cool the first outdoor heat exchanger 110.

Water in the cooling tower 340 may be heat-exchanged with the first outdoor heat exchanger (110).

<Configuration of Storage Cooling Device>

The cold storage device 400 connects the cold storage tank 440 in which water is stored, the second outdoor heat exchanger 120 and the cold storage tank 440, and circulates the water in the cold storage tank 441 and 442. And, it is installed in the cold storage tank pipe 441,442, and includes a cold storage tank 450 for circulating the water.

Water circulated through the cold storage device 400 may be heat-exchanged with the second outdoor heat exchanger 120 operated as an evaporator, and the circulated water may be cooled by the second outdoor heat exchanger 120. The cooled water is stored in the cold storage tank 440.

<Configuration of Showcase Device>

The showcase apparatus 500 is used for providing cold air at a mart or a convenience store. The cold air provided by the showcase apparatus 500 is used to maintain freshness of fresh foods or to keep display articles cold.

The showcase apparatus 500 includes a showcase heat exchanger 510, a showcase expansion valve 560, and a blowing fan 520. The showcase apparatus 500 may provide cold air.

The showcase heat exchanger 510 is operated as an evaporator.

The showcase heat exchanger 510 is connected to the second three-way valve 140 to receive a first refrigerant, and the heat exchanged first refrigerant is provided to the outdoor compressor 101.

To this end, the high pressure refrigerant pipe 541 connecting the second three-way valve 140 and the showcase heat exchanger 510 and the low pressure refrigerant pipe 542 connecting the showcase heat exchanger 510 and the outdoor compressor 101 are provided. Is placed.

The showcase expansion valve 560 is disposed in the high pressure refrigerant pipe 541. The low pressure refrigerant pipe 542 is connected to the second outdoor expansion valve 150.

3 is a diagram illustrating a refrigerant flow when operating the mart shown in FIG. 1, FIG. 4 is a diagram illustrating a refrigerant flow when there is no mart and no hot water load in FIG. 1, and FIG. The diagram shows the refrigerant flow when there is no mart and hot water load.

Hereinafter, a control method of a refrigeration and refrigeration air conditioning system according to the present embodiment will be described in more detail with reference to the accompanying drawings.

Referring to Figure 3 will be described the case of normal operation (time of operation of a mart or convenience store).

In normal operation, the first refrigerant discharged from the outdoor compressor 101 of the outdoor unit 100 flows from the first three-way valve 130 to the hot water supply device 200, and the condensed first refrigerant is the second three-way valve 140. ) Is flowed to the showcase apparatus 500 side.

The first three-way valve 130 blocks the flow of the first refrigerant to the first outdoor heat exchanger 110 and flows the first refrigerant to the second hot water heat exchanger 220 of the hot water supply device 200.

In addition, the second three-way valve 140 blocks the condensed refrigerant from flowing to the second outdoor heat exchanger 120 and flows the first refrigerant to the showcase heat exchanger 510 of the showcase apparatus 500. .

Thus, when the first refrigerant is circulated, the first refrigerant is condensed in the second hot water supply heat exchanger 220 of the hot water supply device 200, and the first refrigerant is generated in the showcase heat exchanger 510 of the showcase device 500. Evaporates.

Meanwhile, the hot water supply device 200 circulates the second refrigerant to condense the second refrigerant in the first hot water heat exchanger 210, and evaporate the second refrigerant in the second hot water heat exchanger 220.

The second hot water heat exchanger 220 heats the first refrigerant and the second refrigerant as a double heat exchanger. The second hot water heat exchanger 220 is operated as a condenser for the first refrigerant and an evaporator for the second refrigerant.

The first hot water heat exchanger 210 heats the second refrigerant and water.

A second refrigerant flows through the second heat exchange part 270 in the hot water supply housing 212, and water flows through the first heat exchange part 260.

The second refrigerant flowing into the second heat exchange part 270 dissipates heat and condenses the heat medium disposed outside the second heat exchange part 270. The heat medium 211 stored in the liquid state in the hot water supply housing 212 may be evaporated by the heat of condensation of the second refrigerant.

The vaporized heat medium 211 flows into the upper space of the hot water supply housing 212 and then heat exchanges with the first heat exchanger 260.

Since the water flowing inside the first heat exchange part 260 is at a lower temperature than the evaporated heat medium 211, the vaporized heat medium 211 is condensed on the surface of the first heat exchange part 260.

Water flowing in the first heat exchanger 260 is heated by receiving heat from a gaseous heat medium. The heat medium deprived of heat to the water is condensed and formed on the outside of the first heat exchanger 260, and the heat medium formed therein may fall downward.

The heat medium 211 may be convection while undergoing evaporation and condensation in the hot water supply housing 212. The first heat exchange part 260 functions as a condenser, and the second heat exchange part 270 functions as an evaporator with respect to the heat medium 211.

The water level of the liquid heat medium 211 is changed depending on the amount of heat medium evaporated in the sealed hot water supply housing 212. As the amount of evaporated heat medium increases, the pressure inside the hot water supply housing 212 increases.

Thus, the water of the hot water tank 240 is heated while passing through the first heat exchange part 260 of the first hot water heat exchanger 210, and the heated water is stored in the hot water tank 240.

The controller may control whether the hot water compressor 201 is operated or an operating frequency according to the water temperature of the hot water tank 240.

The hot water supply unit 200 may be operated independently regardless of the operation of the outdoor unit 100. When the outdoor unit 100 is operated, since the first refrigerant and the second refrigerant are heat exchanged in the second hot water heat exchanger 220, the efficiency is higher and power consumption may be further reduced.

In particular, since the showcase apparatus 500 used in the business store is operated for 24 hours as in the present embodiment, the frequency of operating the hot water supply unit 200 alone is extremely low.

In addition, since the hot water is required when the external air temperature is low, when the external air temperature is low, it is more efficient in terms of power consumption to interact with the hot water supply unit 200 than to operate the outdoor unit 100 alone. It is advantageous.

The showcase apparatus 500 expands the condensed first refrigerant in the showcase expansion valve 560, and the expanded first refrigerant is evaporated in the showcase heat exchanger 510. Air is cooled by the heat of evaporation of the first refrigerant, and the blowing fan 520 discharges the cold air to a showcase (not shown). The discharged coolant cools food or merchandise displayed on the showcase to maintain freshness.

The refrigerant evaporated in the showcase heat exchanger 510 is recovered to the outdoor compressor 101 and then compressed and discharged again.

In the normal operation as in the present embodiment, the second outdoor expansion valve 150 is maintained in the full open state so that the first refrigerant evaporated from the showcase apparatus 500 flows to the outdoor compressor 101.

In normal operation, the cooling tower device 300 and the storage cooling tank 400 is not operated.

Next, the operation process when there is no hot water load when the mart is not operating will be described with reference to FIG. 4.

Even after the closing of the mart, the showcase 500 should be operated to a minimum. However, there may be no hot water load of the hot water supply device 200 after the mart is closed.

In this case, when the hot water supply device 200 is operated without a hot water load, energy is wasted. To prevent this, the waste heat is recovered by cooling the water in the cold storage device 400.

To this end, the first three-way valve 130 flows a first refrigerant to the first outdoor heat exchanger 110 to operate the first outdoor heat exchanger 110 as a condenser.

The first outdoor heat exchanger 110 is a double heat exchanger, and may heat-exchange water of the first refrigerant and the cooling tower device 300. The cooling tower device 300 circulates water to condense the first refrigerant.

The refrigerant condensed in the first outdoor heat exchanger 110 may be provided to either the second outdoor heat exchanger 120 or the showcase heat exchanger 510 by the second three-way valve 140.

When the first refrigerant is provided to the second outdoor heat exchanger 120, the water of the cold storage device 400 may be cooled. When the first refrigerant is provided to the showcase heat exchanger 510, cold air may be provided to the showcase.

When the first refrigerant is provided to the second outdoor heat exchanger 120, the second outdoor expansion valve 150 is closed to block the flow of the first refrigerant to the showcase apparatus 500.

Next, the operation process when there is a hot water load or showcase load when the mart is not operating will be described with reference to FIG. 5.

When the mart is not operated, the outdoor unit 100 is driven to minimize the operation of the showcase apparatus 500. Even when the mart is not running, hot water load may be generated by the user.

In this case, the controller may control the first three-way valve 130 to provide the first refrigerant to at least one of the second hot water supply heat exchanger 220 and the first outdoor heat exchanger 110.

For example, the first refrigerant may be provided only to the second hot water supply heat exchanger 220 to heat the water in the hot water supply tank 240.

For example, the first refrigerant may be provided only to the first outdoor heat exchanger 110 to cool and store the water of the cold storage device 400.

For example, by supplying a first refrigerant to both the second hot water supply heat exchanger 220 and the first outdoor heat exchanger 110, the water of the hot water supply device 240 is heated, and the water of the cold storage device 400 is cooled. You can. When the first refrigerant is provided to both the second hot water heat exchanger 220 and the first outdoor heat exchanger 110, the first three-way valve 130 is provided on the second hot water heat exchanger 220 side and the first. Open all the outdoor heat exchanger 110 side piping.

For example, the controller may alternately provide a first refrigerant to the second hot water heat exchanger 220 and the first outdoor heat exchanger 110.

The controller may control the first three-way valve 130 in various ways according to the size of the hot water load.

Even if there is a hot water load in the hot water supply device 200, the remaining energy of the outdoor unit 100 may be stored in the cold storage device 400.

The first refrigerant is condensed via at least one of the second hot water supply heat exchanger 220 and the first outdoor heat exchanger 110, and the condensed first refrigerant is stored in the second outdoor heat exchanger 120. Heat exchange with water circulating 400 may be evaporated.

Through this, the waste heat of the outdoor unit 100 is recovered to the cold storage device 400 through the second outdoor heat exchanger 120.

On the other hand, when there is a load of the showcase apparatus 500, the condensed first refrigerant may be evaporated in the showcase heat exchanger 510 and provide cold air to the showcase.

6 is a partially cutaway perspective view showing the inside of the hot water supply housing according to the second embodiment of the present invention.

The first hot water heat exchanger 210 'according to the present embodiment is characterized in that the pipe of the first heat exchanger 260' and the pipe of the second heat exchanger 270 'are arranged in a gravity direction.

The first heat exchange part 260 ′ is formed in a cylindrical shape as in the first embodiment, but the longitudinal direction of the pipe is disposed in the gravity direction. When arranged in this way, the heat medium 211 formed in the first heat exchange part 260 'can easily flow down along the outer surface of the pipe, and the droplets of the condensed heat medium 211 move along the pipe. As it grows more rapidly, it can be dropped downward.

In the first embodiment, the heat medium 211 is injected with the amount that the entire second heat exchange part 270 can be locked. However, the heat medium 211 according to the present embodiment is disposed so that the upper portion of the second heat exchange part 270 ′ is exposed on the surface of the water.

That is, the maximum water level of the heat medium 211 is disposed lower than the upper end of the second heat exchange part 270 ′. When the maximum water level is low, the second heat exchanger 270 ′ exposed to the water surface may heat the heat medium 211 existing in the gas state, and more easily control the pressure in the space of the hot water supply housing 212. can do.

When the entire second heat exchange part 270 'is submerged, the heat medium pressure can be adjusted only by heating the whole heat medium, but when the second heat exchange part 270' is partially submerged, the gas medium heat medium is exposed through the exposed part. Heat can be supplied directly to

Since the rest of the configuration is the same as in the first embodiment, detailed description thereof will be omitted.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments but may be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

100: outdoor unit 200: hot water supply device
210: first hot water heat exchanger 211: heat medium
212: hot water supply housing 220: second hot water supply heat exchanger
230: hot water expansion valve 240: hot water tank
241: first hot water supply pipe 242: second hot water supply pipe
250: hot water pump 260: first heat exchanger
270: second heat exchanger 300: cooling tower device
400: cold storage device 500: showcase device

Claims (10)

In the air conditioning system including a hot water supply device for providing hot water,
The hot water supply device,
Hot water housing to store the heat medium in the cold portion;
A first heat exchanger disposed at an upper side of the hot water supply housing and configured to circulate water;
And a second heat exchanger disposed at a lower side of the hot water supply housing and configured to circulate a refrigerant.
The first heat exchanger and the second heat exchanger are spaced apart from each other,
The second heat exchanger heat exchanges the refrigerant and the heat medium in the liquid state to evaporate the heat medium in the liquid state,
And the first heat exchange part heat-exchanges the water and the gaseous heat medium to condense the gaseous heat medium. The method according to claim 1,
The hot water supply device,
Hot water compressor for compressing the refrigerant;
A first hot water heat exchanger condensing the compressed refrigerant;
Hot water expansion valve for expanding the refrigerant condensed by the first hot water heat exchanger;
Hot water supply heat exchanger for evaporating the refrigerant expanded by the hot water expansion valve;
A hot water tank connected to the first hot water heat exchanger to circulate water and storing hot water heated by heat exchange with the first hot water heat exchanger;
A first hot water pipe and a second hot water pipe connecting the hot water tank and the first hot water heat exchanger;
A hot water pump disposed in the hot water supply pipe and circulating water between the hot water tank and the first hot water heat exchanger;
A first refrigerant pipe connecting the hot water compressor and the first hot water heat exchanger to flow a refrigerant;
And a second refrigerant pipe connecting the first hot water heat exchanger and the hot water expansion valve to flow a refrigerant.
The first hot water supply heat exchanger includes the hot water supply housing, the first heat exchange part, the second heat exchange part, and the heat medium,
The hot water tank is connected to the first heat exchange part,
And the hot water compressor and the hot water expansion valve are connected to the second heat exchange unit. The method according to claim 2,
The hot water housing,
A first hot water supply connection valve and a second hot water supply connection valve connected to the first hot water supply pipe and the second hot water supply pipe, respectively;
And a first refrigerant connection valve and a second refrigerant connection valve connected to the first refrigerant pipe and the second refrigerant pipe, respectively. The method according to claim 1,
And the first heat exchange part is formed by rolling a pipe in a cylindrical shape. The method according to claim 1,
And the second heat exchange part is formed by rolling a pipe in a cylindrical shape. The method according to claim 1,
And a pipe length direction of the first heat exchange part is disposed in a gravity direction. The method according to claim 1,
The minimum water level of the heat medium is formed so that at least a portion of the second heat exchanger is submerged. The method according to claim 1,
And the first heat exchange part is located above the water surface of the heat medium, and the second heat exchange part is located below the water surface of the heat medium. The method according to claim 1,
When the heat medium forms the maximum water level, the water surface of the heat medium is spaced apart from the first heat exchanger, the air conditioning system is located below the first heat exchanger. The method according to claim 1,
And a portion of the second heat exchanger portion is exposed to the water surface of the heat medium when the heat medium forms the maximum water level.

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