KR20150113371A - Refrigeration and Heating Ventilation and Air-conditioning system for ice rink using seawater - Google Patents

Refrigeration and Heating Ventilation and Air-conditioning system for ice rink using seawater Download PDF

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KR20150113371A
KR20150113371A KR1020140036572A KR20140036572A KR20150113371A KR 20150113371 A KR20150113371 A KR 20150113371A KR 1020140036572 A KR1020140036572 A KR 1020140036572A KR 20140036572 A KR20140036572 A KR 20140036572A KR 20150113371 A KR20150113371 A KR 20150113371A
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heating
cooling
refrigerant
condensers
heat
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KR1020140036572A
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KR101580796B1 (en
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이길봉
장기창
김민성
이영수
조준현
나호상
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한국에너지기술연구원
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Priority to PCT/KR2015/002689 priority patent/WO2015147483A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system

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  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

According to the present invention, the condensation efficiency is improved and the energy source used for cooling the refrigerant is reduced by condensing the refrigerant compressed in the compressor through heat exchange with seawater, or by providing heat of condensation through heat exchange with the heat medium circulating in the heating / And the energy utilization efficiency can be improved by providing the heat of condensation as a heat source of the heating air conditioning unit. In addition, by controlling the amount of refrigerant supplied to the heating condenser according to the heating load of the heating / air-conditioning unit, it is possible to prevent the condensation pressure from rising even if the heating load is smaller than the condensation heat amount. Further, by connecting a plurality of compressors in parallel, the number of operations of the compressor can be adjusted according to the heating load of the cooling unit or the heating / air-conditioning unit of the cooling unit. In addition, a plurality of cooling condensers and a plurality of heating condensers can be selectively used according to the cooling load of the cooling unit or the heating load of the heating / air-conditioning unit.

Figure P1020140036572

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling and air-conditioning system for an ice-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling and air-conditioning system of an ice-link, and more particularly, to a cooling and air-conditioning system of an ice-link using sea water effective in energy saving by using seawater as a cooling source of a condenser.

Generally, ice rink cooling and air conditioning systems are used to provide refrigeration for maintaining the ice surface, to provide warmth to athletes and spectators, or to provide hot water for additional facilities such as showers or toilets (Heating), ventilation and dehumidification to maintain a pleasant air quality in the room.

Conventional ice link cooling and air conditioning systems reuse condensation heat from refrigeration for heating and hot water production. However, there is a problem that the amount of heat of condensation resulting from the freezing is higher than the amount of heat required for heating or hot water, and the condensation pressure increases with respect to the outdoor temperature, thereby increasing the compression work.

Korean Unexamined Patent Application Publication No. 2003-0082822 discloses an air-cooling / heating system combined with a cooling / heating system that includes a heating system in an ice-cooled thermal cooling system to perform cooling and heating.

An object of the present invention is to provide an ice link cooling and air conditioning system using seawater capable of preventing condensation pressure rise while reusing condensation heat from freezing.

A cooling and air conditioning system for an ice link using seawater according to the present invention comprises a compressor and a cooling unit including a condenser for cooling a part or all of the refrigerant from the compressor through heat exchange with seawater, A heating and air conditioning unit including a seawater supply unit for supplying the heat to the cooling condenser, a plurality of heat demanders, and a heating flow path for circulating the heat medium from the heat demanders; and a cooling / A heating condenser provided between the bypass flow path and the heating flow path for condensing the refrigerant from the compressor through heat exchange with a heat medium circulating through the heating air conditioning unit; The refrigerant flowing into the cooling condenser and the heating condenser according to the heating load, An a controller for controlling.

According to another aspect of the present invention, there is provided a cooling and air conditioning system for an ice link using seawater, comprising: a plurality of compressors arranged in parallel; a plurality of cooling units for cooling the refrigerant, A cooling unit including a plurality of cooling passages for guiding the refrigerant from the compressors to the cooling condensers, a seawater supply unit for supplying the seawater to the cooling condensers, A heating and air conditioning unit including demanding means and a heating flow path for circulating a heat medium from the heat demanders; and a cooling / heating unit branched from each of the plurality of cooling flow paths, wherein a part or all of the refrigerant, A plurality of bypass flow paths for guiding the cooling condensers to bypass the bypass flow paths, And a plurality of heating condensers installed in the heat exchanger for condensing the refrigerant from the compressors through heat exchange with the heating medium circulating through the heating flow path, and a condenser for cooling the condensers, And a control unit for controlling the amount of refrigerant flowing into the heating condensers.

According to another aspect of the present invention, there is provided an ice-link cooling and air-conditioning system using seawater, comprising: a plurality of compressors arranged in parallel; a plurality of cooling devices for cooling the refrigerant, A plurality of cooling passages for guiding the refrigerant from the compressors to the cooling condensers and a plurality of cooling passages for circulating the refrigerant from the cooling condensers through a heat exchange with the link circulation water circulating the ice link, A cooling unit including a plurality of evaporator inlet flow passages for connecting the cooling condensers and the evaporators respectively and a plurality of first expansion valves respectively provided in the plurality of evaporator inlet flow passages, A cooling seawater supply passage formed to sequentially pass the seawater through the cooling condensers, a plurality of heat consumers, A heating and air conditioning unit including a heating flow path for circulating a heating medium from the heat demanders; and a cooling / heating unit branched from each of the plurality of cooling flow paths, wherein a part or all of the refrigerant coming out of the compressors flows through the plurality of cooling condensers A plurality of bypass passages provided between the bypass passages and the heating passages for condensing the refrigerant from the compressors through heat exchange with the heat medium circulating through the heating passages, A plurality of second condenser discharge channels formed to guide the refrigerant condensed in the heating condensers to the plurality of evaporators, a plurality of second expansion valves respectively provided in the heating condenser discharge channels, Cooling passages and a plurality of three-way valves And a control unit controlling the amount of refrigerant flowing into the cooling condensers and the heating condensers by controlling the three-way valves depending on whether the compressors are driven according to the cooling and heating loads.

According to the present invention, the refrigerant compressed in the compressor is condensed through heat exchange with seawater, or the heat is exchanged with the heating medium circulating in the heating / air-conditioning unit to provide condensation heat, thereby improving the condensation efficiency and reducing the energy source And the energy utilization efficiency can be improved by providing the heat of condensation as a heat source of the heating air conditioning unit.

In addition, by controlling the amount of refrigerant supplied to the heating condenser according to the heating load of the heating / air-conditioning unit, it is possible to prevent the condensation pressure from rising even if the heating load is smaller than the condensation heat amount.

Further, by connecting a plurality of compressors in parallel, the number of operations of the compressor can be adjusted according to the heating load of the cooling unit or the heating / air-conditioning unit of the cooling unit.

In addition, a plurality of cooling condensers and a plurality of heating condensers can be selectively used according to the cooling load of the cooling unit or the heating load of the heating / air-conditioning unit.

1 is a configuration diagram illustrating a cooling and air conditioning system of an ice link according to an embodiment of the present invention.
FIG. 2 is a diagram showing a state in which all the first, second, and third compressors shown in FIG. 1 are driven and the heating / air-conditioning unit does not perform heating operation.
FIG. 3 is a view showing a state where all the first, second and third compressors shown in FIG. 1 are driven and all the bypass flow paths are opened and the heating and air-conditioning unit performs heating operation.
4 is a view showing a state in which all of the first, second, and third compressors shown in FIG. 1 are driven and only the first bypass duct is opened, and the heating and air-conditioning unit performs heating operation.
5 is a configuration diagram illustrating a cooling and air conditioning system of an ice link according to another embodiment of the present invention.
Fig. 6 is a diagram showing a state in which the heating / air-conditioning unit shown in Fig. 5 does not perform heating operation.
Fig. 7 is a diagram showing a state in which the heating / air-conditioning unit shown in Fig. 5 performs a heating operation.

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

1 is a configuration diagram illustrating a cooling and air conditioning system of an ice link according to an embodiment of the present invention.

1, the cooling and air conditioning system of the ice link includes a cooling unit 10, a heating and air conditioning unit 20, bypass channels 40, heating condensers 50, a seawater supply unit 60, A link circulating water passage 80 and a control unit (not shown).

The cooling unit 10 is a unit for cooling or cooling the ice surface of the ice link. The cooling unit 10 includes a plurality of compressors 1, 2, 3, a plurality of cooling condensers 4, 5, 6, a plurality of evaporators 7, 8, And a plurality of cooling flow paths 11, 12, and 13, respectively.

The plurality of compressors 1, 2 and 3 will be described as being composed of three first, second and third compressors 1, 2 and 3, The compressors 1, 2, and 3 are arranged in parallel.

The plurality of cooling condensers 4, 5, and 6 correspond to the number of the first, second, and third compressors 1, 2, and 3. That is, the plurality of cooling condensers 4, 5, and 6 are made up of three first, second, and third cooling condensers 4, 5, and 6, for example. The first, second and third cooling condensers 4, 5 and 6 are arranged in parallel with each other. The first, second and third condensers 4, 5 and 6 heat-exchange refrigerant compressed in the first, second and third compressors 1, 2 and 3 with seawater .

The plurality of cooling flow paths 11, 12 and 13 are connected to the first, second and third compressors 1, 2 and 3 and the first, First and second cooling channels 11, 12 and 13 for connecting the first and second cooling fans 5 and 6, respectively. The first, second, and third cooling flow paths 11, 12, and 13 are configured to cool refrigerant from the first, second, and third compressors 1, 2, 3 cooling condensers 4 (5) and (6).

The plurality of evaporators 7, 8, and 9 correspond to the number of the first, second, and third compressors 1, 2, and 3. That is, the plurality of evaporators 7, 8, and 9 are made up of three first, second, and third evaporators 7, 8, and 9, for example. The first, second and third evaporators 7, 8 and 9 are arranged in parallel with each other. The first, second and third evaporators 7, 8 and 9 heat exchange the circulating water of the ice-link circulating water passage 80 and the refrigerant.

The first, second and third evaporators 7, 8 and 9 are connected to the first, second and third cooling condensers 4, 5 and 6 and the evaporator inlet channels 14 and 15 (16). The first expansion valves 14a, 15a, and 16a are installed in the evaporator inlet flow paths 14, 15, and 16, respectively.

The bypass flow path 40 is branched from the first, second and third cooling flow paths 11, 12 and 13 and connected to the first, second and third cooling condensers 4, 5, And is guided to the heating condensers 50, which will be described later. That is, the bypass flow path 40 includes first, second, and third bypass flow paths 41 and 42 branched from the first, second, and third cooling flow paths 11, 12, (43).

In each of the first, second, and third cooling flow paths 11, 12, 13, the first, second, and third bypass flow paths 41, 42, Three-way valves 17, 18, and 19 are respectively installed.

The heating condensers 50 are connected to three first, second and third heating condensers 51 and 52 so as to correspond to the first, second and third bypass flow paths 41, 42 and 43, respectively. (53). The first, second, and third heating condensers 51, 52, and 53 cool the refrigerant bypassed from the first, second, and third compressors 1, 2, and 3, It condenses the unit through heat exchange with the circulating heat medium. That is, the first, second, and third heating condensers 51, 52, and 53 are configured to cool the condensation heat of the refrigerant from the first, second, and third compressors 1, 2, Unit. The first, second and third heating condensers 51, 52 and 53 may be selectively used according to the operation of the first, second and third three-way valves 17, 18 and 19 have.

The heating condensers 50 are connected to the first, second and third evaporator inlet passages 14, 15, 16 by the condenser discharge channels 54, 55, Respectively. Three second expansion valves 54a, 55a and 56a are installed in the first, second and third heating condenser discharge passages 54, 55 and 56, respectively.

The heating / air-conditioning unit 20 includes a plurality of heat consumers, a heating channel 30, and a seawater heat exchanger 70.

The plurality of heat consumers include all of the hot water supply device, the heating device and the ventilation device, and the hot water supply device, the heating device and the ventilation device are sequentially connected in series. However, the present invention is not limited to this, and it is also possible that only a part of the hot water supply device, the heating device and the ventilation device are installed, or only a part thereof is selectively activated. The heat consumers are installed in the first heating flow path 31 connecting the discharge side of the heating condenser 50 and the inlet side of a seawater heat exchanger 70 described later.

The hot water supply apparatus includes a low-temperature bath (21), a hot water heat exchanger (22), and a hot water supply channel (23). The water supply flow path 23 is provided with a pump 23a. The hot water heat exchanger 22 exchanges heat medium between the heating medium passing through the first heating flow path 31 and the hot water from the low temperature bath 21. A pump 22a is installed on the discharge side of the hot water heat exchanger 22.

The heating device is a device for providing warmth to the players or spectators of the ice link, and includes a heater (24) and a heater flow path (25). The heater channel 25 is provided with a pump 25a. The heater flow path 25 is branched from the first heating flow path 31 and guides a heating medium passing through the first heating flow path 31 to the heater 24 and a heating medium from the heater 24 And is guided back to the first heating flow path (31). The heater passage 25 is provided with a pump 29a. A first opening / closing valve (38) is provided between the first heating flow path (31) and the point where both ends of the heater flow path (25) are connected.

The ventilator 28 is a device for providing pleasant air to the athletes or spectators of the ice link and includes a ventilation duct 29. The ventilation passage 29 guides the heating medium which is branched from the first heating flow passage 31 and passes through the first heating flow passage 31 to the ventilator 28, So that the heating medium is guided back to the first heating flow path (31). A pump 29a is installed in the ventilation passage 29. [ A second opening / closing valve 39 is provided between the first heating flow path 31 and the point where both ends of the ventilation flow path 29 are connected.

The heating flow path 30 includes the first heating flow path 31, the second heating flow path 32, the third heating flow path 33, and the fourth heating flow path 34. The first heating flow path 31 is a flow path connecting the discharge port of the heating condenser 50 and the inlet of the seawater heat exchanger 70. The second heating flow path 32 is a flow path for guiding the discharge of refrigerant heat-exchanged in the seawater heat exchanger 70. The third heating flow path 33 is a flow path branched from the first heating flow path 31 and configured to bypass the heat medium passing through the heat demanders through the seawater heat exchanger 70. That is, the third heating flow path 33 is a flow path branched from the first heating flow path 31 and bypass-connected to the second heating flow path 32. A fourth three-way valve 35 is installed at a point where the third heating flow path 33 and the second heating flow path 32 are connected. However, the present invention is not limited to this, and a three-way valve may be provided at a position where the third heating flow path 33 is branched from the first heating flow path 31. The control unit described later can control the operation of the fourth three-way valve (35) in accordance with the heating load of the heating and air-conditioning unit to bypass the seawater heat exchanger (70). The fourth heating flow path (34) is a flow path connecting the second heating flow path (32) and the heating condenser (50). The fourth heating flow path 34 is branched into at least a portion of two flow paths and is joined together. The branched flow paths are provided with pumps 36a and 37a, respectively.

The seawater supply unit 60 includes a cooling seawater supply channel 61 for supplying seawater to the first, second and third cooling condensers 4, 5 and 6, 70 for supplying the heating water for heating. The heating seawater supply passage 63 is branched from the cooling seawater supply passage 61. However, the present invention is not limited thereto and may be separately provided. Although the cooling seawater supply passage 61 passes through the first, second and third cooling condensers 4, 5 and 6 in order, the present invention is not limited to this, , 2 and 3, and the cooling condensers 4, 5 and 6, respectively. The cooling seawater supply passage 61 is provided with a cooling seawater pump 62. A heating seawater pump 64 is installed in the heating seawater supply channel 63.

The control unit (not shown) controls the number of operations of the first, second, and third compressors 1, 2, and 3 according to the cooling load of the cooling unit 10 and the heating load of the heating / 3, 4, 3-way valves 17, 18, 19, and 35 to control the operation of the first, second, third,

2 to 4, the operation according to an embodiment of the present invention will be described as follows.

FIG. 2 is a view showing a state in which all of the first, second, and third compressors shown in FIG. 1 are driven and not in a heating operation.

2, when the cooling load of the cooling unit 10 is equal to or higher than a predetermined set cooling load and the heating load of the heating and air-conditioning unit 20 is less than a preset heating load of the cooling unit 10 Performs the cooling operation, and the heating and air-conditioning unit 20 does not perform the heating operation.

At least a part of the first, second and third compressors 1, 2 and 3 is driven during the cooling operation of the cooling unit 10, (2) and (3) are all driven.

Since the heating and air-conditioning unit 20 does not perform the heating operation, the control unit determines that the refrigerant compressed in the first, second, and third compressors 1, 2, 3 cooling condenser (4) (5) (6). That is, the control unit controls the first, second, and third three-way valves 17, 18, and 19 so that the first, second, and third bypass flow paths 41, 42, Shield. Accordingly, refrigerant compressed in the first, second and third compressors 1, 2, 3 is prevented from flowing into the first, second and third heating condensers 51, 52, 53.

The refrigerant exiting the first compressor (1) and flowing into the first cooling condenser (4) is condensed through heat exchange with seawater supplied through the cooling seawater supply passage (61). In the first cooling condenser (4), by condensing the refrigerant through heat exchange with the seawater, the condensing efficiency is improved and the energy source used to cool the refrigerant can be reduced.

The refrigerant flowing out of the second compressor (2) and flowing into the second cooling condenser (5) is supplied through the cooling seawater supply flow path (61) and flows through the first cooling condenser (4) Lt; / RTI > In the second cooling condenser 5, by condensing the refrigerant through the heat exchange with the seawater, the condensing efficiency is improved and the energy source used to cool the refrigerant can be reduced.

The refrigerant flowing out from the third compressor (3) and flowing into the third cooling condenser (6) is supplied through the cooling seawater supply passage (61) and flows through the sea water passing through the second cooling condenser Lt; / RTI > In the third cooling condenser 6, by condensing the refrigerant through the heat exchange with the seawater, the condensing efficiency is improved and the energy source used to cool the refrigerant can be reduced.

In this embodiment, the first, second, and third compressors 1, 2, and 3 are all driven. However, the present invention is not limited to this, Only some of the 1,2,3 compressors 1, 2, and 3 can be selectively driven.

In the present embodiment, when the cooling load of the cooling unit 10 is equal to or higher than a preset cooling load and the heating load of the heating and air-conditioning unit 20 is less than a preset heating load, However, the present invention is not limited to this. Even when the heating load of the heating / air-conditioning unit 20 is equal to or higher than the set heating load, the heating / It is of course possible to preferentially perform the cooling operation of the cooling unit 10 in accordance with the cooling load of the cooling unit 10. [

FIG. 3 is a view showing a state where all the first, second, and third compressors shown in FIG. 1 are driven and all the bypass flow paths are opened to perform all the heating operations.

3, when the cooling load of the cooling unit 10 is less than a predetermined set cooling load and the heating load of the heating / air-conditioning unit 20 is equal to or higher than a predetermined set heating load, the cooling unit 10 The cooling and heating operation is not performed, and the heating and air-conditioning unit 20 performs the heating operation.

During the heating operation of the heating and air-conditioning unit 20, at least a part of the first, second, and third compressors 1, 2, and 3 are driven, ) (2) and (3) are all driven.

Since the cooling unit 10 does not perform the cooling operation, the control unit determines whether the refrigerant compressed in the first, second, and third compressors 1, 2, (52) and (53) for heating. That is, the control unit controls the first, second, and third three-way valves 17, 18, and 19 so that the first, second, and third bypass flow paths 41, 42, And shields the flow passages flowing into the first, second and third cooling condensers 4, 5, and 6. Therefore, the refrigerant compressed in the first, second and third compressors 1, 2, 3 is blocked from flowing into the first, second and third cooling condensers 4, 5, 6 .

The refrigerant compressed in the first compressor (1) flows into the first heating condenser (51) through the first bypass flow path (41). The refrigerant flowing out of the first compressor 1 and flowing into the first heating condenser 51 through the first bypass flow path 41 is condensed through heat exchange with the heating medium circulating in the heating and air- do. In the first heating condenser 51, refrigerant is condensed through heat exchange with the heating medium, so that heat of condensation can be supplied to the heating and air-conditioning unit 20, so that energy utilization efficiency can be improved.

The refrigerant flowing out of the second compressor 2 and flowing into the second heating condenser 52 through the second bypass flow path 42 is heat-exchanged with the heat medium passing through the first heating condenser 51 Condensed. In the second heating condenser 52, refrigerant is condensed through heat exchange with the heating medium, so that heat of condensation can be supplied to the heating and air-conditioning unit 20, so that energy utilization efficiency can be improved.

The refrigerant flowing out from the third compressor 3 and flowing into the second heating condenser 53 through the third bypass flow path 43 is heat-exchanged with the heat medium passing through the second heating condenser 52 Condensed. In the third heating condenser 53, the refrigerant is condensed through heat exchange with the heating medium, so that the heat of condensation can be supplied to the heating and air-conditioning unit 20, thereby improving energy utilization efficiency.

In the present embodiment, the first, second and third compressors 1, 2, and 3 are all driven. However, the present invention is not limited to this, (3) and selectively drives some of the first, second and third three-way valves (17), (18), and (19) It is also possible to allow the refrigerant to flow only into at least a part of the first, second, and third heating condensers 51, 52, and 53.

In the present embodiment, the heat medium circulating through the heating and air-conditioning unit 20 is heat-exchanged with the seawater in the seawater heat exchanger 70. However, the present invention is not limited thereto, It is of course possible to bypass the seawater heat exchanger 70 in accordance with the heating load of the seawater heat exchanger 70.

In this embodiment, when the cooling load of the cooling unit 10 is less than a preset cooling load and the heating load of the heating / air-conditioning unit 20 is equal to or higher than a preset heating load, The heating and air-conditioning unit 20 performs the heating operation without performing the cooling operation. However, even when the cooling load of the cooling unit 10 is higher than the set cooling load, the heating / The heating of the heating and air-conditioning unit 20 may be preferentially performed according to the heating load of the indoor heat exchanger 20.

Meanwhile, FIG. 4 is a diagram illustrating a state where all the first, second, and third compressors shown in FIG. 1 are driven and only the first bypass passage is opened.

4, when the cooling load of the cooling unit 10 is equal to or higher than the set cooling load and the heating load of the heating and air-conditioning unit 20 is equal to or higher than the set heating load, the cooling operation of the cooling unit 10 And the heating operation of the heating and air-conditioning unit (20). Here, the first, second, and third compressors 1, 2, and 3 are all driven, the refrigerant compressed by the first compressor 1 flows into the first heating condenser 51, The refrigerant compressed in the second and third compressors (2) and (3) is introduced into the second and third cooling condensers (5) and (6). The amount of refrigerant flowing from the first, second, and third compressors 1, 2, 3 to the cooling unit 10 and the heating / 10 and the heating load of the heating and air-conditioning unit 20. [ That is, the refrigerant compressed in the first compressor (1) flows into the first cooling condenser (4), and the refrigerant compressed in the second and third compressors (2, 3) It is of course possible to supply the refrigerant to the condenser 52 (53).

The refrigerant compressed in the first compressor (1) flows into the first heating condenser (51) through the first three-way valve (17). The refrigerant flowing into the first heating condenser (51) is condensed through heat exchange with the heating medium circulating through the heating / air-conditioning unit (20). In the first heating condenser 51, refrigerant is condensed through heat exchange with the heating medium, so that heat of condensation can be supplied to the heating and air-conditioning unit 20, so that energy utilization efficiency can be improved.

The refrigerant compressed in the second compressor (2) flows into the second cooling condenser (5) through the second three-way valve (18). The refrigerant introduced into the second cooling condenser 5 is supplied through the cooling seawater supply passage 61 and is condensed through heat exchange with seawater passing through the first cooling condenser 4. In the second cooling condenser 5, by condensing the refrigerant through the heat exchange with the seawater, the condensing efficiency is improved and the energy source used to cool the refrigerant can be reduced.

The refrigerant compressed in the third compressor (3) flows into the third cooling condenser (6) through the third three-way valve (19). The refrigerant flowing into the third cooling condenser 6 is supplied through the cooling seawater supply flow path 61 and is condensed through heat exchange with seawater passing through the second cooling condenser 5. In the third cooling condenser 6, by condensing the refrigerant through the heat exchange with the seawater, the condensing efficiency is improved and the energy source used to cool the refrigerant can be reduced.

In the present embodiment, the heat medium circulating through the heating and air-conditioning unit 20 is heat-exchanged with the seawater in the seawater heat exchanger 70. However, the present invention is not limited thereto, It is of course possible to bypass the seawater heat exchanger 70 in accordance with the heating load of the seawater heat exchanger 70.

In the present embodiment, the heat medium is passed through the hot water heat exchanger 22, the heater 24, and the ventilator 28 in this order. However, the present invention is not limited to this, (22), the heater (24), and a part of the ventilator (28) are selectively used.

Although the first, second, and third compressors 1, 2, and 3 are all driven in the present embodiment, the cooling load of the cooling unit 10 and the cooling / 2, and 3 according to the heating load of the first, second, and third compressors 1, 2, and 3, respectively. That is, only the first and second compressors 1 and 2 are driven, the refrigerant compressed in the first compressor 1 flows into the first heating condenser 51, and the refrigerant in the second compressor 2 It is of course possible that the compressed refrigerant flows into the second cooling condenser 5.

5 is a configuration diagram illustrating a cooling and air conditioning system of an ice link according to another embodiment of the present invention. Fig. 6 is a diagram showing the refrigerant flow in the cooling and air-conditioning system shown in Fig. 5;

5 and 6, a cooling and air conditioning system according to another embodiment of the present invention includes a cooling unit 110 and a heating and air conditioning unit 120, and includes a compressor 111, a cooling condenser 112, The heating condenser 150, and the evaporator 117 are formed as a single unit, and the rest of the configuration is similar to that of the above embodiment, so that different points will be described in detail.

The compressor (111) and the cooling condenser (112) are connected to a cooling flow path (113). The cooling condenser 112 and the evaporator 117 are connected to the evaporator inlet flow path 15. A first expansion valve (116) is installed in the evaporator inlet flow path (15).

The heating condenser 150 is installed in the bypass flow path 140 branched from the cooling flow path 113. The discharge side of the heating condenser 150 is connected to the evaporator inlet flow path 15 by a heating condenser discharge flow path 141. A second expansion valve 142 is provided in the heating-purpose condenser discharge passage 141.

6 and 7, the operation of the cooling and air-conditioning system according to another embodiment of the present invention will be described as follows.

The refrigerant from the compressor 111 flows into the cooling condenser 112 or into the heating condenser 150. The control unit (not shown) controls the three-way valve 114 according to the cooling load of the cooling unit 110 and the heating load of the heating and air-conditioning unit 120 so that the cooling condenser 112 or the heating condenser 150). ≪ / RTI >

Referring to FIG. 6, when the heating load of the heating and air-conditioning unit 120 is lower than a preset heating load, the heating and air-conditioning unit 120 does not perform the heating operation. Accordingly, the refrigerant from the compressor 111 flows into the cooling condenser 112.

The refrigerant introduced into the cooling condenser 112 is condensed through heat exchange with seawater introduced through the cooling seawater supply passage 61. By condensing the refrigerant in the cooling condenser 112 through heat exchange with the seawater, the condensing efficiency is improved and the energy source used to cool the refrigerant can be reduced.

The refrigerant condensed in the cooling condenser 112 is expanded in the first expansion valve 142 and then flows into the evaporator 117.

Referring to FIG. 7, when the heating load of the heating and air-conditioning unit 120 is equal to or higher than a preset heating load, the heating and air-conditioning unit 120 performs the heating operation. Accordingly, the control unit opens the bypass flow path 140 to introduce the refrigerant from the compressor 111 into the heating condenser 150.

The refrigerant flowing into the heating condenser 150 through the bypass flow path 140 is condensed through heat exchange with the heating medium circulating through the heating and air-conditioning unit 20. [ In the heating condenser 150, refrigerant is condensed through heat exchange with the heating medium, so that heat of condensation can be supplied to the heating and air-conditioning unit 20, so that energy utilization efficiency can be improved.

The refrigerant condensed in the heating condenser 150 is expanded in the second expansion valve 142 and then flows into the evaporator inlet flow path 115.

However, the present invention is not limited to this. The compressor 111 is composed of two refrigerants, and the refrigerant compressed in one compressor is supplied to the cooling condenser 111. In this embodiment, And the refrigerant compressed by the other compressor is supplied to the heating condenser 150, of course.

In this embodiment, the heat medium circulating through the heating and air-conditioning unit 120 is heat-exchanged with the seawater in the seawater heat exchanger 70. However, the present invention is not limited thereto, It is of course possible to bypass the seawater heat exchanger 70 according to the load.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1,2,3: First, second and third compressors 4, 5, 6: First, second and third cooling condensers
10: cooling unit 20: heating air conditioning unit
40: bypass channel 50: heating condenser
60: Seawater supply part 61: Seawater supply channel for cooling
63: Seawater supply channel for heating

Claims (11)

A cooling unit including a compressor and a cooling condenser for cooling some or all of the refrigerant from the compressor through heat exchange with seawater;
A seawater supply unit for supplying the seawater to the cooling condenser;
A heating and air conditioning unit including a plurality of heat demanders and a heating flow path for circulating the heat medium from the heat demanders;
A bypass flow path for guiding a part or all of the refrigerant discharged from the compressor to bypass the cooling condenser;
A heating condenser provided between the bypass flow path and the heating flow path for condensing the refrigerant from the compressor through heat exchange with the heat medium circulating through the heating and air-conditioning unit;
And a controller for controlling an amount of refrigerant flowing into the cooling condenser and the heating condenser according to a cooling load and a heating load. A plurality of compressors arranged in parallel, a plurality of cooling condensers for cooling the refrigerant from each of the plurality of compressors through heat exchange with seawater, and a condenser for guiding the refrigerant from the compressors to the cooling condensers A cooling unit including a plurality of cooling channels;
A seawater supply unit for supplying the seawater to the cooling condensers;
A heating and air conditioning unit including a plurality of heat demanders and a heating flow path for circulating the heat medium from the heat demanders;
A plurality of bypass flow paths branched from the plurality of cooling flow paths to guide a part or all of the refrigerant from the compressors to bypass the plurality of cooling condensers;
A plurality of heating condensers provided between the bypass flow paths and the heating flow path for condensing the refrigerant from the compressors through heat exchange with a heating medium circulating through the heating flow path;
And a controller for controlling whether or not the compressors are driven according to a cooling and heating load and an amount of refrigerant flowing into the cooling condensers and the heating condensers. The method according to claim 1 or 2,
The heating /
Further comprising a seawater heat exchanger provided between the heat consumer and the heating condenser on the heating flow path for heat-exchanging the heat medium from the heat consumers with the seawater. The method of claim 3,
The seawater supply unit includes:
A cooling seawater supply channel for supplying seawater to the cooling condenser,
And a heating water supply channel branched from the cooling sea water supply channel and supplying the sea water to the seawater heat exchanger. The method of claim 2,
Further comprising a plurality of three-way valves provided at respective points where the bypass flow paths branch from the cooling flow paths,
Wherein the control unit controls the three-way valves according to the cooling and heating load. The method of claim 5,
Wherein,
And the number of operation of the plurality of compressors is controlled according to the cooling and heating load. The method of claim 2,
The cooling unit includes:
A plurality of evaporators for evaporating the refrigerant from each of the plurality of cooling condensers through heat exchange with circulating water circulating through the ice link,
A plurality of evaporator inlet flow paths connecting the cooling condensers and the evaporators, respectively;
Further comprising a plurality of first expansion valves provided in the plurality of evaporator inlet flow paths, respectively. The method of claim 7,
And a plurality of heating condenser discharge channels connected to the heating condensers and the evaporator inlet channels to guide the refrigerant condensed in the heating condensers to the evaporators, . The method of claim 8,
Further comprising a plurality of second expansion valves provided respectively in the heating condenser discharge flow paths. The method according to claim 1 or 2,
The heat demanders are refrigeration and air conditioning systems of ice rinks using seawater including a low temperature bath, a heating device, and a ventilation device. A plurality of compressors arranged in parallel, a plurality of cooling condensers for cooling the refrigerant from each of the plurality of compressors through heat exchange with seawater, and a condenser for guiding the refrigerant from the compressors to the cooling condensers And a plurality of evaporators for evaporating the refrigerant through heat exchange with a circulating water circulating the ice link, the evaporators being connected to the cooling condensers and the evaporators, respectively, And a plurality of first expansion valves provided respectively in the plurality of evaporator inlet flow paths;
A cooling seawater supply passage formed to sequentially pass the seawater through the cooling condensers;
A heating and air conditioning unit including a plurality of heat demanders and a heating flow path for circulating the heat medium from the heat demanders;
A plurality of bypass flow paths branched from the plurality of cooling flow paths to guide a part or all of the refrigerant from the compressors to bypass the plurality of cooling condensers;
A plurality of heating condensers provided between the bypass flow paths and the heating flow path for condensing the refrigerant from the compressors through heat exchange with a heating medium circulating through the heating flow path;
A plurality of heating condenser discharge channels formed to guide the refrigerant condensed in the heating condensers to the plurality of evaporators;
A plurality of second expansion valves provided respectively in the heating condenser discharge flow paths;
A plurality of three-way valves provided at each of the cooling flow paths and the bypass flow paths;
And a control unit controlling the amount of refrigerant flowing into the cooling condensers and the heating condensers by controlling the three-way valves according to whether the compressors are driven according to a cooling load or a heating load, .
KR1020140036572A 2014-03-28 2014-03-28 Refrigeration and Heating Ventilation and Air-conditioning system for ice rink using seawater KR101580796B1 (en)

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PCT/KR2015/002689 WO2015147483A1 (en) 2014-03-28 2015-03-19 Refrigeration and air-conditioning system for ice rink, using seawater

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11101518A (en) * 1997-09-29 1999-04-13 Fujita Corp Heat source switching type air conditioner and heat source switching type air conditioning method
KR20070071793A (en) * 2005-12-30 2007-07-04 위니아만도 주식회사 A controling device of refrigerants in an air conditioner
KR101150659B1 (en) * 2011-07-29 2012-05-25 한국해양연구원 Refrigeration and air-conditioning system for ice rink using deep seawater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11101518A (en) * 1997-09-29 1999-04-13 Fujita Corp Heat source switching type air conditioner and heat source switching type air conditioning method
KR20070071793A (en) * 2005-12-30 2007-07-04 위니아만도 주식회사 A controling device of refrigerants in an air conditioner
KR101150659B1 (en) * 2011-07-29 2012-05-25 한국해양연구원 Refrigeration and air-conditioning system for ice rink using deep seawater

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