KR101780071B1 - Hot water circulation system associated with heat pump - Google Patents

Hot water circulation system associated with heat pump Download PDF

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Publication number
KR101780071B1
KR101780071B1 KR1020110043285A KR20110043285A KR101780071B1 KR 101780071 B1 KR101780071 B1 KR 101780071B1 KR 1020110043285 A KR1020110043285 A KR 1020110043285A KR 20110043285 A KR20110043285 A KR 20110043285A KR 101780071 B1 KR101780071 B1 KR 101780071B1
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South Korea
Prior art keywords
refrigerant
heat
hot water
heat exchanger
pump
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KR1020110043285A
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Korean (ko)
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KR20120125693A (en
Inventor
유상훈
정승모
박내현
이응열
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엘지전자 주식회사
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12—Hot water central heating systems using heat pumps

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)

Abstract

The present invention relates to a hot water circulation system for a heat pump. One aspect of the heat pump circulating hot water circulation system according to an embodiment of the present invention is an air conditioning apparatus including an indoor unit and an outdoor unit in which a first refrigerant that is heat-exchanged with indoor air and outdoor air is circulated for air conditioning of the indoor space; A hot water supply device for forming hot water provided; And a second heat exchanger through which the first refrigerant circulating in the air conditioning device flows, a second heat exchanger through which water stored in the hot water supply device circulates, and a second refrigerant circulating between the first and second heat exchangers A pump, and a control unit for controlling the operation of the pump; And the control unit controls the operation of the pump so that the temperature of the second refrigerant maintains the predetermined reference temperature. Therefore, according to the embodiment of the present invention, the effect of minimizing the adhesion of the inorganic salts contained in the water circulating in the hot water circulation cycle can be expected.

Description

[0001] Hot water circulation system associated with heat pump [

The present invention relates to a hot water circulation system for a heat pump.

Generally, a heat pump system is a cooling / heating device that transfers a low-temperature heat source to a high temperature or transfers a high-temperature heat source to a low temperature by using heat of a refrigerant or condensation heat. Recently, a heat pump system in which a heat pump cycle and a hot water circulation cycle are combined is being released. In such a heat pump system, hot water supply and / or floor heating is performed by heat-exchanging the refrigerant discharged from the compressor constituting the heat pump refrigerant circuit with water.

However, such a heater pump system has the following problems.

In general, various kinds of inorganic salts contained in water circulating in a hot water circulation cycle are used as a flow path in which water flows, for example, a refrigerant circulating in a heat pump cycle, a heat exchanger in which water circulating in a hot water circulation cycle is heat- Circulating water of the cycle may be adhered to a flowing pipe or the like. Particularly, when calcium carbonate (CaCO3) produced by the reaction of calcium hydrogen carbonate (Ca (HCO3) 2) at a high temperature in calcium salts adheres to the inner surface of the pipe, not only the amount of water flowing through the pipe is reduced, There is a fear that the pipe is shielded.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot-water circulation system for a heat pump interlocking structure which is configured to prevent adhesion of inorganic salts to a flow path through which water flows.

According to an aspect of the present invention, there is provided a heat pump circulating hot water circulating system for an indoor unit and an outdoor unit through which a first refrigerant, which is heat-exchanged with indoor air and outdoor air, An air conditioner comprising: A hot water supply device for forming hot water provided; And a second heat exchanger through which the first refrigerant circulating in the air conditioning device flows, a second heat exchanger through which water stored in the hot water supply device circulates, and a second refrigerant circulating between the first and second heat exchangers A pump, and a control unit for controlling the operation of the pump; And the control unit controls the operation of the pump so that the temperature of the second refrigerant maintains the predetermined reference temperature.

According to the embodiment of the heat pump interlocking hot water circulation system according to the present invention, the adhesion of the inorganic salts contained in the water circulating in the hot water circulation cycle is minimized. Therefore, according to the present embodiment, more efficient heat exchange can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a first embodiment of a hot water circulating system for a heat pump according to the present invention; FIG.
Fig. 2 is a view showing a second embodiment of a hot water circulation system linked with a heat pump according to the present invention. Fig.

Hereinafter, the structure of the first embodiment of the heat pump circulation system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a first embodiment of a hot water circulating system for a heat pump according to the present invention.

1, a hot water circulation system (hereinafter referred to as a hot water circulation system) according to the present embodiment includes an air conditioning apparatus 100, a hot water supply apparatus 200 and a heat exchange apparatus 300 . The air conditioning apparatus 100 performs air conditioning of an indoor space, and the hot water supply apparatus 200 performs hot water supply. The heat exchanger (300) performs heat exchange between the air conditioning apparatus (100) and the hot water supply apparatus (200).

More specifically, the air conditioning apparatus 100 includes an in-room unit 110 and an out-room unit 120. The indoor unit 110 and the outdoor unit 120 are provided with various components constituting a heat exchange cycle, for example, a compressor for compressing refrigerant, an indoor heat exchanger for performing heat exchange between refrigerant and indoor or outdoor air, And the like. In addition, the air conditioning system 100 performs the air conditioning of the room, that is, the cooling and / or the cooling of the room by the heat exchange between the refrigerant circulating in the heat exchange cycle (hereinafter referred to as "first refrigerant" Performs heating. During the cooling operation, the first refrigerant compressed by the compressor is heat-exchanged with the outdoor air in the outdoor heat exchanger to be condensed. The first refrigerant condensed in the outdoor heat exchanger is heat-exchanged with indoor air in the indoor heat exchange and evaporated, thereby cooling the indoor space. During the heating operation, the first refrigerant evaporated by heat exchange with the outdoor air in the outdoor heat exchanger is compressed into the compressor. The first refrigerant compressed in the compressor is heat-exchanged with indoor air in the indoor heat exchanger and condensed, thereby heating the indoor space.

On the other hand, the water heater 200 generates heat by supplying heat to the air conditioning apparatus 100 by the heat exchanger 300, and supplies the hot water. To this end, the water heater 200 includes a water tank 210 in which water for generating hot water is stored. The water stored in the water tank 210 is heated by heat exchange with the air conditioning apparatus 100 to generate hot water.

The heat exchange apparatus 300 serves to transfer heat from the air conditioning apparatus 100 to the hot water supply apparatus 200. The heat exchanger 300 includes first and second heat exchangers 310 and 320, a pump 330, a flow sensor 340, a temperature sensor 350, and a controller 360.

A refrigerant (hereinafter referred to as a second refrigerant) circulates between the first and second heat exchangers 310 and 320. As the second refrigerant, general water containing inorganic salts is used. The first heat exchanger (310) exchanges heat between the first refrigerant and the second refrigerant. The second heat exchanger 320 exchanges heat between the second refrigerant and the water stored in the water tank 210. That is, in the first heat exchanger 310, heat exchange is performed between the first refrigerant circulating the air conditioning apparatus 100 and the second refrigerant circulating between the first and second heat exchangers 310 and 320 . In the second heat exchanger 320, heat exchange is performed between the second refrigerant circulating between the first and second heat exchangers 310 and 320 and the water circulating through the hot water supply device 200.

In this embodiment, a plate heat exchanger (PCHE) is used as the first heat exchanger 310. The plate-type heat exchanger is assembled by laminating several sheets of heat-exchange plates processed into corrugated shapes (waveforms) at regular intervals. Heat exchange is performed between different types of refrigerant flowing through the flow path formed between the heat exchange plates. Such a plate heat exchanger has been disclosed in Korean Patent Laid-Open Publication No. 2003-71249 (name: plate heat exchanger), and a detailed description thereof will be omitted.

The pump 330 functions to pump the refrigerant circulating between the first and second heat exchangers 310 and 320. In this embodiment, the pump 330 is installed on the flow path through which the second refrigerant flows from the first heat exchanger 310 to the second heat exchanger 320.

The flow rate sensor 340 and the temperature sensor 350 sense the flow rate and the temperature of the second refrigerant circulating between the first and second heat exchangers 310 and 320, respectively. Here, the flow rate sensor 340 is installed on a flow path through which the second refrigerant flows from the first heat exchanger 310 to the second heat exchanger 320, and the temperature sensor 350 is disposed on the second heat exchange (320) to the first heat exchanger (310). In other words, the flow rate sensor 340 senses the flow rate of the second refrigerant heat-exchanged with the first refrigerant in the first heat exchanger 310. The temperature sensor 350 senses the temperature of the second refrigerant in the first heat exchanger 310 before it is heat-exchanged with the first refrigerant.

The controller 360 controls the operation of the pump 330 so that the flow rate and the temperature of the second refrigerant sensed by the flow sensor 340 and the temperature sensor 350 maintain a predetermined reference flow rate and a predetermined reference temperature . The reference flow rate and the reference temperature are set so that the inorganic salts contained in the second refrigerant circulating between the first and second heat exchangers 310 and 320 are supplied to the first and second heat exchangers 310 and 320, And / or the inside of the flow path connecting the first and second heat exchangers (310, 320). In other words, the control unit 360 controls the operation of the pump 330 to adjust the flow rate and temperature of the second refrigerant, so that the inorganic salts contained in the second refrigerant are supplied to the first and second heat exchangers 310, (320) and the flow path connecting the both.

Here, the reference flow rate is set to 0.05 m / s or more and 0.09 m / s or less, preferably 0.06 m / s or more and 0.07 m / s or less. The reference temperature is set to 50 ° C or more and 70 ° C or less, preferably 55 ° C or more and 65 ° C or less.

The reference flow rate and the reference temperature are values determined by an experiment of the inventor. In the case of using generally supplied tap water as the second refrigerant, the flow rate and the temperature of the second refrigerant are set to the reference flow rate and the reference temperature The adhesion of the inorganic salts to the inside of the flow path connecting the first and second heat exchangers 310 and 320 and the both is minimized.

Hereinafter, the operation of the first embodiment of the hot water circulation system with a heater pump according to the present invention will be described in more detail.

First, when the air conditioner 100 operates, the first refrigerant compressed by the compressor circulates in the air conditioner 100, and the indoor space is cooled or heated. At this time, the first refrigerant compressed in the compressor flows through the first heat exchanger 310 and is transferred to the indoor heat exchanger or the outdoor heat exchanger.

The high-temperature first refrigerant compressed by the compressor flows through the first heat exchanger 310 and flows through the first and second heat exchangers 310 and 320 while the second refrigerant, which is circulating between the first and second heat exchangers 310 and 320, Heat exchange occurs. The second refrigerant heat-exchanged with the first refrigerant in the first heat exchanger 310 is circulated between the second heat exchanger 320 and the water tank 210 while flowing through the second heat exchanger 320 Heat exchange with relatively low temperature water. Therefore, hot water is generated by heat exchange between the water stored in the water tank 210 and the second refrigerant. The hot water thus generated is selectively taken out to the outside in a state of being stored in the water tank 210.

Meanwhile, the control unit 360 controls the operation of the pump 330 so that the flow rate and the temperature of the second refrigerant circulating between the first and second heat exchangers 310 and 320 are maintained at the reference flow rate and the reference temperature, respectively . That is, for example, when the flow rate of the second refrigerant detected by the flow rate sensor 340 is lower than the reference flow rate, the controller 360 increases the number of operations of the pump 330, So that the flow rate of the fluid can be increased. When the temperature of the second refrigerant sensed by the temperature sensor 350 is higher than the reference temperature, the control unit 360 decreases the number of operations of the pump 330 so that the relative humidity between the first and second refrigerants The temperature of the second refrigerant can be reduced by decreasing the heat exchange amount.

However, the reference flow rate and the reference temperature are set to values that can minimize the reaction of the inorganic salts contained in the second refrigerant in which general tap water is used. Accordingly, in this embodiment, the phenomenon that the inorganic salts contained in the second refrigerant circulating through the first and second heat exchangers 310 and 320 are adhered to each other is minimized.

Hereinafter, a second embodiment of a heat pump circulation system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a view showing a second embodiment of a hot water circulating system for a heat pump according to the present invention. The same components as those of the first embodiment of the present invention among the constituent elements of the present embodiment will be referred to with the same reference numerals in Fig. 1, and a detailed description thereof will be omitted.

Referring to FIG. 2, in this embodiment, a pressure drop value that is not a flow rate of the second refrigerant circulating between the first and second heat exchangers 310 and 320 is sensed. The control unit 360 controls the operation of the pump 330 so that the pressure drop value of the second refrigerant maintains the predetermined reference drop value.

More specifically, in this embodiment, first and second pressure sensors 370 and 380 are provided adjacent to the inlet and outlet of the first heat exchanger 310. That is, the first pressure sensor 370 is installed on the flow path through which the second refrigerant is transferred from the second heat exchanger 320 to the first heat exchanger 310, and the first pressure sensor 370 is disposed on the first heat exchanger 310 The second pressure sensor (380) is installed on the flow path through which the second refrigerant is transferred to the second heat exchanger (320).

The first and second pressure sensors 370 and 380 are respectively connected to the first and second heat exchangers 310 and 310 so that the pressure of the second refrigerant sucked into the first heat exchanger 310 and the pressure of the second refrigerant discharged from the first heat exchanger 310 It senses the pressure. The control unit 360 controls the pressure difference of the second refrigerant detected by the first and second pressure sensors 370 and 380, that is, the pressure drop value of the second refrigerant based on the first heat exchanger 310 Controls the operation of the pump 330 to maintain the reference pressure drop value. In the present embodiment, the reference pressure drop value is set to 3 KPa / m or more and 7 KPa / m or less, preferably 4 KPa / m or more and 6 KPa / m or less. The reference pressure drop value is a value determined by an experiment of the inventor. When the pressure drop value of the second refrigerant is the reference pressure drop value, the adhesion of the inorganic salts contained in the second refrigerant is minimized.

In the above-described embodiment, the burner is described as including the first and second burners, but the first and second burners may be referred to as an outer burner and an inner burner depending on their positions.

Claims (8)

An air conditioning apparatus including an indoor unit and an outdoor unit in which indoor air and a first refrigerant heat-exchanged with outdoor air circulate for air conditioning of the indoor space;
A hot water supply device for forming hot water provided; And
A first heat exchanger through which the first refrigerant circulating in the air conditioning apparatus flows, a second heat exchanger through which the water stored in the hot water supply apparatus circulates, and a pump for feeding the second refrigerant circulating between the first heat exchanger and the second heat exchanger And a control unit for controlling the operation of the pump. Lt; / RTI >
The heat exchanging device includes:
A flow rate sensor for measuring a flow rate of a second refrigerant circulating between the first and second heat exchangers, and a temperature sensor for measuring a temperature of the second refrigerant circulating between the first and second heat exchangers ,
Wherein the flow rate sensor senses a flow rate of a second refrigerant heat-exchanged with the first refrigerant in the first heat exchanger,
The temperature sensor senses the temperature of the second refrigerant in the first heat exchanger before heat exchange with the first refrigerant,
Wherein the control unit controls the operation of the pump so that the temperature and the flow rate of the second refrigerant maintain a preset reference temperature and a predetermined reference flow rate.
The method according to claim 1,
Wherein the reference temperature is 50 占 폚 to 70 占 폚.
delete delete The method according to claim 1,
The reference flow rate is 0.05 m / s or more and 0.09 m / s or less.
delete The method according to claim 1,
Wherein the controller controls the operation of the pump so that the pressure drop value of the second refrigerant before and after flowing through the first heat exchanger maintains a predetermined reference drop value.
8. The method of claim 7,
Wherein the reference drop value is not less than 3 KPa / m and not more than 7 KPa / m.
KR1020110043285A 2011-05-09 2011-05-09 Hot water circulation system associated with heat pump KR101780071B1 (en)

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KR1020110043285A KR101780071B1 (en) 2011-05-09 2011-05-09 Hot water circulation system associated with heat pump

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Application Number Priority Date Filing Date Title
KR1020110043285A KR101780071B1 (en) 2011-05-09 2011-05-09 Hot water circulation system associated with heat pump

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KR20120125693A KR20120125693A (en) 2012-11-19
KR101780071B1 true KR101780071B1 (en) 2017-09-19

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