KR102058051B1 - Plate type exchanger for air conditioning system - Google Patents

Abstract

The plate heat exchanger of the air conditioning system according to the present invention comprises a plurality of heat exchange plates each having a first fluid passage through which a first fluid flows and a second fluid passage through which a second fluid flows; A plurality of first-first fluid connection pipes connecting the lower side of the heat exchange plate and connecting the first fluid flow paths to flow the first fluids; A plurality of first and second fluid connection pipes connecting upper sides of the heat exchange plate and connecting the first fluid flow paths to flow the first fluids; A plurality of 2-1 fluid connection pipes connecting the lower side of the heat exchange plate and connecting the second fluid flow paths to flow the second fluids; And a plurality of 2-2 fluid connection pipes connecting the upper side of the heat exchange plate and connecting the second fluid flow path to flow the second fluid. The heat exchange plate of one side of the plurality of heat exchange plates. The conversion pipe for constituting the first pass, and the remaining heat exchange plays on the other side of the plurality of heat exchange plates constitute a second pass, and transferring the first fluid from the first pass to the second pass. It is disposed only in any one of the 1-1 fluid connection pipe or the 1-2 fluid connection pipe, the flow direction of the first fluid flowing in the heat exchange plate on one side with respect to the conversion pipe and in the heat exchange plate on the other side The flow direction of the flowing first fluid is reversed.
When the plate heat exchanger of the air conditioning system according to the present invention heat-exchanges the first fluid and the second fluid, the first fluid and the second fluid flow in parallel flow in the first pass located on the inlet side, and are located on the discharge side. In the second pass, the first fluid and the second fluid may flow in opposite flows, thereby improving heat exchange performance.

Description

Plate type exchanger for air conditioning system

The present invention relates to a plate heat exchanger, and more particularly to a plate heat exchanger for heat exchange between water and refrigerant.

Generally, 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 integrally manufactured.

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 a refrigerant pipe.

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 directly by 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 that provides a user by cooling or heating water by using heat generated in the circulation of the 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, a conventional hot water heat exchanger is a plate heat exchanger is used, the heat medium and the circulating water is a heat exchange structure in the plate heat exchanger.

However, since the characteristics of the heat transfer coefficient and the pressure loss of the water and the refrigerant are different, there is a problem in that the heat transfer efficiency is low when the water and the refrigerant are heat exchanged at the same volume.

Republic of Korea Patent Registration 10-1543750 B1

An object of the present invention is to provide a plate heat exchanger for an air conditioning system capable of effectively heat-exchanging water and refrigerant having different heat transfer coefficients.

An object of the present invention is to provide a plate heat exchanger for an air conditioning system in which water and a refrigerant are formed in a counter flow when heat and heat exchanges the water and the refrigerant.

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.

When the plate heat exchanger of the air conditioning system according to the present invention heat exchanges the first fluid and the second fluid, the inlet side flows the first fluid and the second fluid in parallel flow, and the discharge side the first fluid and the second fluid in the counterflow. It is possible to improve the heat exchange performance by flowing to.

The plate heat exchanger of the air conditioning system according to the present invention comprises a plurality of heat exchange plates each having a first fluid passage through which a first fluid flows and a second fluid passage through which a second fluid flows; A plurality of first-first fluid connection pipes connecting the lower side of the heat exchange plate and connecting the first fluid flow paths to flow the first fluids; A plurality of first and second fluid connection pipes connecting upper sides of the heat exchange plate and connecting the first fluid flow paths to flow the first fluids; A plurality of 2-1 fluid connection pipes connecting the lower side of the heat exchange plate and connecting the second fluid flow paths to flow the second fluids; And a plurality of 2-2 fluid connection pipes connecting the upper side of the heat exchange plate and connecting the second fluid flow path to flow the second fluid. The heat exchange plate of one side of the plurality of heat exchange plates. The conversion pipe for constituting the first pass, and the remaining heat exchange plays on the other side of the plurality of heat exchange plates constitute a second pass, and transferring the first fluid from the first pass to the second pass. It is disposed only in any one of the 1-1 fluid connection pipe or the 1-2 fluid connection pipe, the flow direction of the first fluid flowing in the heat exchange plate on one side with respect to the conversion pipe and in the heat exchange plate on the other side The flow direction of the flowing first fluid is reversed.

A first fluid supply pipe positioned at one edge of the plurality of heat exchange plates based on the switching pipe to supply the first fluid; And a first fluid discharge pipe positioned at the other edge of the plurality of heat exchange plates based on the switching pipe to discharge the first fluid.

A second fluid supply pipe which is located at one or the other edge of the plurality of heat exchange plates with respect to the conversion pipe and supplies the second fluid; And a second fluid discharge pipe disposed on the same side as the second fluid supply pipe based on the conversion pipe among the plurality of heat exchange plates to discharge the second fluid.

The number of the heat exchange plates disposed in the first pass based on the conversion pipe may be 25% to 30% of the total number of heat exchange plates.

When the diverter tube is located among the first fluid connection tubes, the diverter tube is located on a straight line connecting the first and second fluid connectors, and the diverter tube is located among the first and second fluid connectors. If it is, it can be located on a straight line connecting the 1-1 fluid connection pipe.

The first path may be disposed on the side of the first fluid supply pipe to which the first fluid is supplied, and the second path may be disposed on the side of the first fluid discharge pipe from which the first fluid is discharged.

The flow direction of the first fluid is the same as the flow direction of the second fluid in the plurality of heat exchange plates forming the first pass, and the first in the plurality of heat exchange plates forming the second pass. The flow direction of the first fluid and the flow direction of the second fluid may be opposite to each other.

The air conditioning system according to the present invention has one or more of the following effects.

First, when the plate heat exchanger of the air conditioning system according to the present invention heat exchanges the first fluid and the second fluid, the first fluid and the second fluid flow in parallel flow in the first pass located at the inlet side, In the second pass located there is an advantage that the first fluid and the second fluid can flow in a counter flow to improve the heat exchange performance.

Second, the plate heat exchanger of the air conditioning system according to the present invention has an advantage of optimizing the heat exchange performance of the first fluid and the second fluid having different heat transfer coefficients by designating the range of the second pass exchanged in the counter flow.

Third, since the plate heat exchanger of the air conditioning system according to the present invention arranges the blocking space and the switching pipe for changing the flow direction of the refrigerant, the flow path of the refrigerant consists of a first pass and a second pass, and the water flow path is one pass. There is an advantage that can be configured as.

The plate heat exchanger of the air conditioning system according to the present invention has an advantage of maximizing heat exchange performance by adjusting the ratio of the first pass according to the type of the first fluid and the second fluid having different heat transfer coefficients.

1 is a configuration diagram of an air conditioning system according to a first embodiment of the present invention.
2 is a perspective view of a plate heat exchanger according to a first embodiment of the present invention.
3 is an exemplary view illustrating a fluid flow of the plate heat exchanger illustrated in FIG. 2.
4 is a block diagram showing a refrigerant flow when operating the mart shown in FIG.
FIG. 5 is a diagram illustrating a refrigerant flow when the mart is not operated and there is no hot water load in FIG. 1.
FIG. 6 is a diagram illustrating a refrigerant flow when there is no mart and hot water supply unit in FIG. 1.
FIG. 7 is a graph showing experimental results according to the ratio of the first pass in the plate heat exchanger according to FIG. 2.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and those of ordinary skill 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 configuration diagram of an air conditioning system according to a first embodiment of the present invention.

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 may be disposed in the pipe of the outdoor unit 100 to limit the flow direction of the refrigerant.

<Configuration of hot water supply device>

The hot water supply device 200 is a hot water 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 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 the water in the hot water tank 240, and the first hot water heat exchanger 210 heats the water to circulate with the water.

<Configuration of Cooling Tower Unit>

The cooling tower device 300 includes a cooling tower 340 for storing water, cooling tower pipes 341 and 342 for connecting the first outdoor heat exchanger 110 and the cooling tower 340 and circulating water, 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 the fresh food or to keep the display items 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.

Meanwhile, in the present embodiment, the plate type heat exchanger is disposed in the first outdoor heat exchanger 110, the first hot water heat exchanger 210, and the second outdoor heat exchanger 120 for exchanging water and refrigerant.

Figure 2 is a perspective view of a plate heat exchanger according to a first embodiment of the present invention, Figure 3 is an exemplary view showing the fluid flow of the plate heat exchanger shown in FIG.

<Configuration of Plate Heat Exchanger>

The first outdoor heat exchanger 110, the first hot water heat exchanger 210, and the second outdoor heat exchanger 120 according to the present exemplary embodiment are designed in consideration of the water and the refrigerant having different heat transfer coefficients.

The plate heat exchanger 600 includes a plurality of heat exchange plates 610, a plurality of first fluid connection pipes 620 for connecting a heat exchange plate 610 to flow a refrigerant that is a first fluid, and the heat exchange plate ( 610 is connected to a plurality of second fluid connection pipe 630 for flowing water, which is a second fluid, and a heat exchange plate 610 located at one side (right side of the drawing) of the plurality of heat exchange plates 610. A first fluid supply pipe 640 disposed to supply a first fluid and a heat exchange plate 610 disposed at an edge of the other side (left side of the drawing) of the plurality of heat exchange plates 610 to discharge the first fluid. A first fluid discharge pipe 650 to be disposed, a second fluid supply pipe 660 disposed on a heat exchange plate 610 located at one side or the other edge of the plurality of heat exchange plates 610 to supply a second fluid, and the Plural heat exchangers Is disposed on the rate (610) and the second fluid line heat exchanger plate 610, the 660 is placed in a second fluid discharge pipe 670 for discharging the second fluid.

In the present embodiment, each of the fluid passages 611 and 612 through which the first fluid and the second fluid flow are formed in the heat exchange plate 610. Each flow path formed in the heat exchange plate 610 is partitioned, and the first fluid and the second fluid flow independently.

The first fluid connection pipe 620 is disposed between two adjacent heat exchange plates 610 and connects the first fluid passage 611 to two adjacent heat exchange plates 610. The second fluid connection pipe 630 is disposed between two adjacent heat exchange plates 610, and connects the second fluid flow path 612 at two adjacent heat exchange plates 610.

A first fluid may flow through the first fluid passage 611 and the first fluid connection pipe 620 respectively formed in the plurality of heat exchange plates 610. Similarly, the second fluid may flow through the second fluid passage 612 and the second fluid connection pipe 630 respectively formed in the plurality of heat exchange plates 610. A refrigerant flows through the first fluid passage 611 and water flows through the second fluid passage 612.

The first fluid connection pipe 620 is divided into a 1-1 fluid connection pipe 621 and a 1-2 fluid connection pipe 622 according to the installation position. The 1-1 fluid connection pipe 621 is located at the lower side, the 1-2 fluid connection pipe 622 is located at the upper side.

In this embodiment, the heat exchange plate 610 is formed with four holes on one side, four holes are formed on the other side. Two of the holes formed in one side are for flowing the first fluid, and the other two are for flowing the second fluid. Two of the holes formed on the other side are for flowing the first fluid, and the other two are for flowing the second fluid. In this way, all of the heat exchange plates 610 may be manufactured in the same shape to lower manufacturing costs.

And the holes in which the pipes are not connected among the holes of the heat exchange plate 610 are closed by installing the hole cover 626. Unlike the present embodiment, the hole may not be holed in a hole to which the pipe is not connected, and may be manufactured to be blocked.

In the present embodiment, the plate heat exchanger 600 heat-exchanges the water and the refrigerant, and may have different sizes of holes through which water flows and holes through which the refrigerant flows. For example, the diameters of the holes connected to the first flow path through which the refrigerant flows are smaller than the diameters of the holes connected to the second flow path through which the water flows. In this embodiment, the ratio of the diameters of the holes connected to the first flow path through which the refrigerant flows and the diameters of the holes connected to the second flow path through which the water flows is 1: 2.

In the present embodiment, the plate heat exchanger 600 is formed to form a parallel flow in which the refrigerant and water flow in the same direction in some sections, and to form a counter flow in which the refrigerant and water flow in the other sections.

In particular, in this embodiment, the parallel flow is formed on the side of the first fluid supply pipe 640 to which the refrigerant is supplied, and the counter flow is formed on the side of the second fluid supply pipe 650 from which the refrigerant is discharged. That is, the counterflow is formed on the side from which the refrigerant is discharged, thereby improving heat exchange efficiency of the refrigerant and water.

To this end, the plate heat exchanger 600 is installed one of a plurality of 1-1 fluid connection pipe 621 or a plurality of 1-2 fluid connection pipe 622 connected in a line to change the flow direction of the refrigerant. I never do that.

In the present embodiment, a plurality of first-first fluid connection pipes 621 are arranged in a line, and a blocking space 625 in which the first-first fluid connection pipe 621 is not connected is formed. The opposite 1-2 fluid connection pipe 622 in which the blocking space 625 is formed is normally disposed.

The opposite fluid connecting pipe in which the blocking space 625 is disposed is defined as a switching pipe 627. One side (right side) of the blocking space 625 is defined as the first path 611-1, and the other side (left side) is defined as the second path 611-2.

The refrigerant of the first pass 611-1 flows to the second pass 611-2 through the first 1-2 fluid connection pipe 622 disposed above the blocking space 625. The refrigerant flow direction of the first pass 611-1 and the refrigerant flow direction of the second pass 611-2 are formed to be opposite.

The first pass 611-1 and the second pass 611-2 form a first fluid passage 611.

Unlike the present embodiment, the blocking space is positioned on a straight line (upper side) connecting the plurality of 1-2 first fluid connecting pipes 622, and the switching pipe 627 is configured to connect the 1-1 fluid connecting pipes 621. It may be located on a straight line (lower side) to connect.

Thus, the refrigerant flows from the lower side to the upper side when the first pass 611-1 flows, and the entire direction flows from the upper side to the lower side when the second pass 611-2 flows.

In this embodiment, the water in the second fluid passage 612 flows from the lower side to the upper side in the overall direction.

Thus, the number of the heat exchange plates 610 forming the first pass 611-1 in the plate heat exchanger 600 is 25% to 30%, and the second pass 611-2 is formed. The number of heat exchange plates 610 is formed from 75% to 70%.

If the ratio is less than the lower limit, the number of high-drying regions of the refrigerant is increased, so that the distribution performance is lowered. If the upper limit is exceeded, the heat exchange amount is lowered because the pressure loss of the high-drying regions is increased. An experimental result graph regarding this is shown in FIG. 7.

Referring to FIG. 7A, when the ratio of the first pass 611-1 of the heat exchange plate 610 is less than or above the above range, it may be confirmed that the heat exchange amount is reduced.

Referring to FIG. 7B, when the ratio of the first pass 611-1 of the heat exchange plate 610 is less than or above the range, it can be seen that the pressure loss is increased.

Meanwhile, in the present embodiment, the first fluid supply pipe 640, the second fluid supply pipe 660, and the second fluid discharge pipe 670 are disposed at one side (right side) of the plate heat exchanger 600, and the other side (left side). The first fluid discharge pipe 650 is disposed in the.

The first fluid supply pipe 640 and the first fluid discharge pipe 650 are disposed in opposite directions, and the second fluid supply pipe 660 and the second fluid discharge pipe 670 are disposed in the same direction.

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

4 is a diagram illustrating a refrigerant flow when operating the mart shown in FIG. 1, FIG. 5 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 supply.

Referring to Figure 4 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 discharged 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 is a double heat exchanger, and heat-exchanges the second refrigerant and water.

The water in the hot water tank 240 is heated while passing through the first hot water heat exchanger 210, and the heated water is stored in the hot water tank 240. When the user uses hot water, the stored hot water is discharged and fresh water is supplied. The hot water supply device 200 maintains the temperature of the hot water tank 240 in the appropriate hot water.

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 the food or goods 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 cold storage 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. 5.

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 closes.

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 the 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. 6.

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 of 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 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.

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
300: cooling tower device 400: cold storage device
500: showcase device 600: plate heat exchanger
610: heat exchange plate 611: first fluid passage
611-1: First pass 611-2: Second pass
612: second fluid passage 620: first fluid connection pipe
621: 1-1 fluid connection pipe 622: 1-2 fluid connection pipe
625: blocking space 627: switching tube
630: second fluid connection pipe 640: first fluid supply pipe
650: first fluid discharge pipe 660: second fluid supply pipe
670: second fluid discharge pipe

Claims (7)

An outdoor unit circulating the first refrigerant in a cooling cycle and including a first outdoor heat exchanger and a second outdoor heat exchanger through which the first refrigerant is circulated; A hot water supply device circulating a second refrigerant in a cooling cycle and including a second hot water supply heat exchanger in which the first refrigerant and the second refrigerant of the outdoor unit are heat exchanged; A cooling tower device configured to circulate water to pass through the first outdoor heat exchanger; And a cold storage device for circulating water to pass through the second outdoor heat exchanger.
The outdoor unit,
An outdoor compressor for compressing the first refrigerant; A first three-way valve for selecting and flowing the compressed first refrigerant into any one of the first outdoor heat exchanger and the second hot water heat exchanger; A first outdoor heat exchanger configured to exchange heat between the first refrigerant supplied from the first three-way valve and the water of the cooling tower device; A first outdoor expansion valve configured to expand the first refrigerant passing through the first outdoor heat exchanger; And a second outdoor heat exchanger configured to exchange heat between the first refrigerant expanded by the first outdoor expansion valve and the water of the accumulator.
The cooling tower device,
A cooling tower in which water is stored; A cooling tower pipe connecting the first outdoor heat exchanger and the cooling tower and circulating water; Includes; the cooling tower pump is installed in the cooling tower pipe for circulating water,
The cold storage device,
A cold storage tank in which water is stored; A cold storage pipe connecting the second outdoor heat exchanger and the cold storage tank and circulating water; And a storage cooling tank pump installed in the storage cooling pipe to circulate water.
The hot water supply device,
A hot water supply tank in which water is stored: a hot water compressor for compressing the second refrigerant;
A first hot water heat exchanger configured to exchange heat between the second refrigerant compressed by the hot water compressor and the water circulating in the hot water tank; Hot water expansion valve for expanding the refrigerant condensed by the first hot water heat exchanger; A second hot water heat exchanger for evaporating the refrigerant expanded by the hot water expansion valve and heat-exchanging the first and second refrigerants supplied from the first three-way valve of the outdoor unit; 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.
A hot water pump disposed between the first hot water heat exchanger and the hot water tank to circulate water; Including,
At least one of the first hot water heat exchanger, the first outdoor heat exchanger, and the second outdoor heat exchanger,
A heat exchange plate comprising a plurality of heat exchange plates each having a first fluid passage through which a first fluid flows and a second fluid passage through which a second fluid flows;
A plurality of first-first fluid connection pipes connecting the lower side of the heat exchange plate and connecting the first fluid flow paths to flow the first fluids;
A plurality of first and second fluid connection pipes connecting upper sides of the heat exchange plate and connecting the first fluid flow paths to flow the first fluids;
A plurality of 2-1 fluid connection pipes connecting the lower side of the heat exchange plate and connecting the second fluid flow paths to flow the second fluids;
And a plurality of 2-2 fluid connection pipes connecting the upper side of the heat exchange plate and connecting the second fluid flow path to flow the second fluid.
The heat exchange plates on one side of the plurality of heat exchange plates constitute a first pass, and the remaining heat exchange plates on the other side of the plurality of heat exchange plates constitute a second pass,
The switching pipe for transferring the first fluid from the first pass to the second pass is disposed only in any one of the 1-1 fluid connection pipe or the 1-2 fluid connection pipe,
And a flow direction of the first fluid flowing in the heat exchange plate on one side and a flow direction of the first fluid flowing in the heat exchange plate on the other side with respect to the switching tube. The method according to claim 1,
A first fluid supply pipe positioned at one edge of the plurality of heat exchange plates based on the switching pipe to supply the first fluid;
And a first fluid discharge pipe disposed at the other edge of the plurality of heat exchange plates based on the switching pipe to discharge the first fluid. The method according to claim 2,
A second fluid supply pipe which is located at one or the other edge of the plurality of heat exchange plates with respect to the conversion pipe and supplies the second fluid;
And a second fluid discharge pipe disposed on the same side as the second fluid supply pipe based on the switching pipe among the plurality of heat exchange plates to discharge the second fluid. The method according to claim 1,
The number of heat exchange plates arranged in the first pass based on the conversion pipe is
Plate heat exchanger of the air conditioning system consisting of 25% to 30% of the total number of heat exchange plates. The method according to claim 1,
When the diverter tube is located among the first fluid connection tubes, the diverter tube is located on a straight line connecting the first and second fluid connectors, and the diverter tube is located among the first and second fluid connectors. If it is, the plate heat exchanger of the air conditioning system located on a straight line connecting the 1-1 fluid connection pipe. The method according to claim 2,
And the first pass is disposed on the side of the first fluid supply pipe to which the first fluid is supplied, and the second pass is disposed on the side of the first fluid discharge pipe to discharge the first fluid. The method according to claim 1,
In the plurality of heat exchange plates forming the first path, the flow direction of the first fluid and the flow direction of the second fluid are the same,
And a flow direction of the first fluid and a flow direction of the second fluid are opposite to each other in the plurality of heat exchange plates forming the second pass.

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