KR102631083B1 - Regenerative heat pump system comprising geothermal exchanger - Google Patents

Abstract

Provided is a heat-storage-type heat pump system comprising a geothermal exchanger, which can utilize excess energy of the heat pump system more aggressively. The heat-storage-type heat pump system comprising a geothermal exchanger according to one aspect of the present invention comprises: a heat pump which exchanges heat with a hot water load or a first air conditioning load; a heat battery in which a heat exchange fluid circulating between the heat pump and the heat battery exchanges heat with a heat storage fluid stored therein; and at least one geothermal heat exchanger in which the heat exchange fluid circulating between the heat pump and the heat battery or between the heat pump and the geothermal heat exchanger exchanges heat with the ground. When the heat pump exchanges heat with the hot water load, the heat exchange fluid circulating between the heat pump and the heat battery exchanges heat with the heat storage fluid stored in the heat battery. When the heat pump exchanges heat with the first air conditioning load, the heat exchange fluid circulating between the heat pump and the heat battery exchanges heat with the heat storage fluid stored in the heat battery, the heat exchange fluid circulating between the heat pump, the heat battery, and the geothermal exchanger exchanges heat with the heat storage fluid stored in the heat battery and the ground, or the heat exchange fluid circulating between the heat pump and the geothermal exchanger exchanges heat with the ground.

Description

Heat pump system including a ground heat exchanger {REGENERATIVE HEAT PUMP SYSTEM COMPRISING GEOTHERMAL EXCHANGER}

The present invention relates to a regenerative heat pump system including an underground heat exchanger.

An underground heat exchanger is one in which a heat exchange fluid such as groundwater buried in the ground and flowing inside exchanges heat with the ground. A heat pump system including an underground heat exchanger that utilizes energy from the ground has been proposed. Prior patent literature (Korean Patent Publication No. 1415972) discloses a heat pump system including an underground heat exchanger. Referring to prior patent documents, conventionally, the energy received from the geothermal supply unit 80 is stored in the first and second heat storage units 30 and 40, and the first and second heat storage units 30 and 40 ) Depending on the temperature of the first and second heat storage units 30 and 40, energy is transferred to the buffer tank 10 through the geothermal heat pump 20, is transferred to the heat storage tank 60, or is transferred to the geothermal heat supply unit ( 80). Therefore, in the prior art, energy is simply stored in the first and second heat storage units 30 and 40, and the energy stored in the first and second heat storage units 30 and 40 is actively used. There are drawbacks to not being able to do it.

Republic of Korea Patent Publication No. 1299519 (Name: Geothermal complex system for hot water supply only) Republic of Korea Patent Publication No. 2044681 (Name: Storage heat pump system including underground heat exchanger)

The present invention is intended to solve the problems of the prior art as described above, and the purpose of the present invention is to enable more active use of excess energy due to the temperature difference between the load, the heat exchange fluid circulating in the heat pump system, and the ground. The aim is to provide a regenerative heat pump system including an underground heat exchanger.

One aspect of a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention for achieving the above-described object includes: a heat pump exchanging heat with a hot water supply load or a first air conditioning load; a heat battery in which a heat exchange fluid circulating between the heat pump and the heat storage fluid exchanges heat with a heat storage fluid stored therein; and at least one underground heat exchanger in which the heat exchange fluid circulating between the heat pump and the heat battery or between the heat pump exchanges heat with the ground. The rule includes, when the heat pump exchanges heat with the hot water supply load, the heat exchange fluid circulating between the heat pump and the heat battery exchanges heat with the heat storage fluid stored in the heat battery, and the heat pump exchanges heat with the first heat storage fluid. In the case of heat exchange with an air conditioning load, the heat exchange fluid circulating between the heat pump and the heat battery exchanges heat with the heat storage fluid stored in the heat battery, or the heat exchange fluid circulating between the heat pump, the heat battery, and the underground heat exchanger The fluid exchanges heat with the heat storage fluid stored in the heat battery and the ground, or the heat exchange fluid circulating between the heat pump and the ground heat exchanger exchanges heat with the ground.

In one aspect of an embodiment of the present invention, when the heat pump exchanges heat with the first air conditioning load operating in a cooling mode, the heat exchange fluid circulating between the heat pump and the heat battery is the heat storage stored in the heat battery. After exchanging heat with the fluid, when the temperature of the heat storage fluid stored in the heat battery increases due to heat exchange with the heat exchange fluid circulating between the heat pump and the heat battery and reaches a preset first reference temperature, the heat pump , the heat exchange fluid circulating between the heat battery and the underground heat exchanger exchanges heat with the heat storage fluid stored in the heat battery.

In one aspect of the embodiment of the present invention, when the heat pump exchanges heat with the first air conditioning load operating in a cooling mode, heat exchange with the heat exchange fluid circulating between the heat pump, the heat battery, and the underground heat exchanger When the temperature of the heat storage fluid stored in the heat battery reaches the second reference temperature, which is set to a temperature below the first reference temperature, the heat exchange fluid circulating between the heat pump and the heat battery is stored in the heat battery. Heat is exchanged with the heat storage fluid.

In one aspect of the embodiment of the present invention, the heat storage fluid stored in the heat battery exchanges heat with the heat exchange fluid circulating between the heat pump and the heat exchange fluid circulating between the heat pump and the second air conditioning load. .

In one aspect of an embodiment of the present invention, when the heat storage fluid stored in the heat battery exchanges heat with the heat exchange fluid circulating between the heat battery and the second air conditioning load operating in a cooling mode, the heat pump and the cooling mode When the first air conditioning load operating in this mode exchanges heat, the heat exchange fluid circulating between the heat pump and the ground heat exchanger exchanges heat with the ground, regardless of the temperature of the heat storage fluid stored in the heat battery.

Another aspect of the storage type heat pump system including an underground heat exchanger according to an embodiment of the present invention includes a heat pump that exchanges heat with the hot water supply load or the first air conditioning load when the hot water supply load or the first air conditioning load operates; a heat battery in which the heat exchange fluid circulating between the heat pump or the heat exchange fluid circulating between the second air conditioning load exchanges heat with the heat storage fluid stored therein; at least one underground heat exchanger in which the heat exchange fluid circulating between the heat pump and the heat battery or between the heat pump exchanges heat with the ground; a first pump that pumps the heat exchange fluid between the heat pump and the heat battery; a second pump that pumps the heat exchange fluid between the heat pump, the heat battery, and the underground heat exchanger or between the heat pump and the underground heat exchanger; a third pump that pumps the heat exchange fluid between the second air conditioning load and the heat battery; and causing the heat exchange fluid to circulate between at least two of the heat pump, heat battery, and underground heat exchanger or between the second air conditioning load and the heat battery by the operation of at least one of the first to third pumps. Control valve to control; Includes.

In another aspect of an embodiment of the present invention, depending on at least one of the temperature of the heat storage fluid stored in the heat battery, whether the hot water supply load is operating, and whether the first and second air conditioning loads are operating, the first and second air conditioning loads are operated. The two pumps operate alternatively, the first and third pumps operate alternatively, and the second and third pumps operate independently.

In another aspect of the embodiment of the present invention, when the hot water supply load operates and the heat pump exchanges heat with the hot water supply load, the first pump operates, and the control valve is operated to perform heat exchange by the first pump. Control fluid to circulate between the heat pump and heat battery.

In another aspect of an embodiment of the present invention, when the first air conditioning load operates in a cooling mode and the heat pump exchanges heat with the first air conditioning load, the temperature of the heat storage fluid stored in the heat battery is preset to the first air conditioning load. If the temperature is below the reference temperature, the first pump operates, the control valve controls the heat exchange fluid pumped by the first pump to circulate between the heat pump and the heat battery, and the heat storage fluid stored in the heat battery When the temperature is higher than the first reference temperature, the second pump operates, and the control valve controls the heat exchange fluid pumped by the second pump to circulate between the heat pump, the heat battery, and the underground heat exchanger. do.

In another aspect of the embodiment of the present invention, when the first air conditioning load operates in a cooling mode and the heat pump exchanges heat with the first air conditioning load, the heat pump, the heat battery, and the second pump are pressurized. When the temperature of the heat storage fluid stored in the heat battery reaches a second reference temperature that is set to a temperature lower than the first reference temperature by heat exchange with the heat exchange fluid circulating between underground heat exchangers, the first pump In operation, the control valve controls the heat exchange fluid pumped by the first pump to circulate between the heat pump and the heat battery.

In another aspect of the embodiment of the present invention, when the first and second air conditioning loads each operate in a cooling mode and the heat pump and the heat battery exchange heat with the first and second air conditioning loads, respectively, the second and second air conditioning loads Each third pump operates, and the control valve controls the heat exchange fluid pumped by the first pump to circulate between the heat pump and the underground heat exchanger.

In the heat storage type heat pump system including an underground heat exchanger according to an embodiment of the present invention, excess energy is stored in the heat battery through the heat exchange fluid circulating in the heat pump system, and at the same time, the energy stored in the heat battery is used for a separate load. . Therefore, according to the embodiment of the present invention, it is possible to expect the effect of more actively utilizing the extra energy of the heat pump system.

1 is a configuration diagram showing a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.
2 to 5 are fluid flow diagrams showing the flow of fluid in a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.

Hereinafter, the configuration of a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a configuration diagram showing a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.

Referring to FIG. 1, the regenerative heat pump system 1 including an underground heat exchanger according to this embodiment includes a heat pump 100, a heat battery 200, an underground heat exchanger 300, and first to third pumps. (P1)(P2)(P3) and control valve (V). In particular, in this embodiment, the energy stored in the heat battery 200 can be more actively used for the load.

Here, the 'load' may include the hot water supply load 10 and the first and second air conditioning loads 21 and 22. The hot water supply load 10 uses energy to generate hot water for hot water supply, and the first and second air conditioning loads 21 and 22 use energy to condition the indoor space, that is, for cooling or heating. Use . In particular, in this embodiment, the first and second air conditioning loads 21 and 22 independently perform air conditioning in separate spaces.

More specifically, the heat pump 100 exchanges heat with the hot water supply load 10 or the first air conditioning load 21 when the hot water supply load 10 or the first air conditioning load 21 operates. The heat pump 100 is provided with the hot water supply load 10 through a heat exchange fluid, for example, water, that circulates between the heat battery 200 or between the heat battery 200 and the underground heat exchanger 300. ) Or, the first air conditioning load 21 and the heat storage fluid stored in the heat battery 200 exchange heat, or the heat storage fluid stored in the heat battery 200 exchanges heat with the ground.

The heat pump 100 may be comprised of a heat exchange cycle including, for example, a compressor, a condenser, an expansion valve, and an evaporator. Accordingly, the condenser constituting the heat pump 100 exchanges heat with the hot water supply load 10 or the first air conditioning load 21 operating in the heating mode, and the evaporator constituting the heat pump 100 performs heat exchange in the cooling mode. Heat can be exchanged with the first air conditioning load 21 that operates.

And in the heat battery 200, the heat exchange fluid circulating between the heat pump 100 or the heat exchange fluid circulating between the second air conditioning load 22 and the heat storage fluid stored therein exchange heat. The heat battery 200 may be buried underground to ensure space utilization in buildings such as machine rooms.

As the heat storage fluid, a material with higher heat storage properties compared to the heat exchange fluid, that is, water, is used. For example, phase change materials (pcm) may be used as the heat storage fluid. Such a phase change material is stored in the heat battery 200 in a form filled in a separate member.

Next, the underground heat exchanger 300 is buried in the ground outside the building and is where the heat exchange fluid exchanges heat with the ground. Substantially, the temperature of the heat exchange fluid is reduced or increased by heat exchange with the ground in the ground heat exchanger 300. Substantially, in the ground heat exchanger 300, the heat exchange fluid circulating between the heat pump 100 and the heat battery 200 or between the heat pump 100 exchanges heat with the ground.

Generally, the underground heat exchanger 300 is buried in a hole drilled in the excavated ground. In this embodiment, the heat battery 200 may be buried in the ground above the hole where the underground heat exchanger 300 is buried. Accordingly, separate construction work can be eliminated for burial of the heat battery 200.

Substantially, the underground heat exchanger 300 includes a plurality of heat exchange tubes 310 and first and second headers 321 and 322. The heat exchange tube 310 is substantially buried in the ground and is a place where the heat exchange fluid flowing therein exchanges heat with the ground. And the first and second headers 321 and 322 are where the heat exchange fluid is distributed to the heat exchange tube 310 or where the heat exchange fluid flowing through the heat exchange tube 310 joins. For example, the heat exchange tube 310 may be formed as a whole in a U shape, and both ends of the heat exchange tube 310 are connected to the first and second headers 321 and 322, respectively.

The first pump (P1) pumps the heat exchange fluid between the heat pump 100 and the heat battery 200. Therefore, when the first pump (P1) operates, the heat pump 100 stores the heat exchanger fluid in the heat battery 200 by the heat exchange fluid circulating between the heat pump 100 and the heat battery 200. Heat is exchanged with the thermal storage fluid.

And the second pump (P2) exchanges the heat exchange fluid between the heat pump 100, the heat battery 200, and the underground heat exchanger 300 or between the heat pump 100 and the underground heat exchanger 300. Transport by pressure. Therefore, when the second pump (P2) operates, the heat pump 100 generates the heat by the heat exchange fluid circulating between the heat pump 100, the heat battery 200, and the underground heat exchanger 300. Heat is exchanged with the heat storage fluid stored in the battery 200 or with the heat exchange fluid circulating between the heat pump 100 and the underground heat exchanger 300.

The third pump (P3) pumps the heat exchange fluid between the second air conditioning load 22 and the heat battery 200. Therefore, when the third pump (P3) operates, the second air conditioning load The heat storage fluid stored in the heat battery 200 exchanges heat with the second air conditioning load 22 by the heat exchange fluid circulating between (22) and the heat battery 200.

In particular, in this embodiment, at least one of the temperature of the heat storage fluid stored in the heat battery 200, whether the hot water supply load 10 is operating, and whether the first and second air conditioning loads 21 and 22 are operating. Depending on which one, the operation of the first and second pumps (P1) (P2) is performed alternatively, and the operation of the first and third pumps (P1) (P3) is performed alternatively, The second and third pumps (P2) and (P3) operate independently. A detailed description of this will be provided later.

And the control valve (V) operates the heat pump 100, the heat battery 200, and the underground heat exchanger ( The heat exchange fluid is controlled to circulate between at least two of the 300) or between the second air conditioning load 22 and the heat battery 200. Substantially, the control valve (V) is between the heat pump 100 and the heat battery 200, or between the heat pump 100, the heat battery 200, and the underground heat exchanger 300, or between the heat pump 100 ) and the underground heat exchanger 300 to control the heat exchange fluid to circulate. Additionally, the control valve V controls the heat exchange fluid to circulate between the second air conditioning load 22 and the heat battery 200.

Unillustrated reference numeral 400 is an energy supply unit. The energy supply unit 400 supplies energy for the operation of the heat pump 100. For example, a renewable energy facility such as a commercial power source or solar power generation facility may be used as the energy supply unit 400. You can. In particular, when the energy supply unit 400 is a used power source, the heat pump 100 operates using electricity during late-night hours when power rates are relatively low, and the heat pump 100 operates as the hot water supply load 10. ) and the heat storage fluid stored in the heat battery 200, respectively, so that the generation of hot water for hot water supply and the storage of energy in the heat storage fluid stored in the heat battery 200 can be achieved relatively inexpensively. Of course, in the case of no-load hot water supply, heat dissipation into the air may be achieved by a separate condenser (not shown).

Hereinafter, the operation of a regenerative heat pump system including a ground heat exchanger according to an embodiment of the present invention will be described in more detail with reference to the attached drawings.

2 to 5 are fluid flow diagrams showing the flow of fluid in a regenerative heat pump system including an underground heat exchanger according to an embodiment of the present invention.

First, referring to FIG. 2, when the hot water supply load 10 operates to generate hot water for hot water supply, the heat pump 100 exchanges heat with the hot water supply load 10. Then, the first pump (P1) operates, and the control valve (V) controls the heat exchange fluid pumped by the first pump (P1) to circulate between the heat pump 100 and the heat battery 200. Therefore, heat is transferred to the hot water supply load 10 by heat exchange with the heat pump 100 to generate hot water for hot water supply, and the heat of the heat storage fluid stored in the heat battery 200 is transferred to the heat pump 100. is passed on.

Next, referring to FIG. 3, when the first air conditioning load 21 operates in a cooling mode, the heat pump 100 exchanges heat with the first air conditioning load 21. At this time, if the temperature of the heat storage fluid stored in the heat battery 200 is less than the preset first reference temperature, the first pump (P1) operates, and the control valve (V) operates the first pump (P1). The heat exchange fluid pumped by is controlled to circulate between the heat pump 100 and the heat battery 200. Accordingly, waste heat resulting from the operation of the first air conditioning load 21 in the cooling mode is transferred to the heat pump 100 and then transferred to the heat storage fluid stored in the heat battery 200 by the heat exchange fluid.

And referring to FIG. 4, when the temperature increases due to heat exchange with the heat pump 100 and the temperature of the heat storage fluid stored in the heat battery 200 becomes more than the first reference temperature, the second pump (P2) ) operates, and the control valve (V) allows the heat exchange fluid pumped by the second pump (P2) to circulate between the heat pump 100, the heat battery 200, and the underground heat exchanger 300. Control. Therefore, the waste heat resulting from the operation of the first air conditioning load 21 in the cooling mode and the heat of the thermal storage fluid stored in the heat battery 200 after being transferred to the heat pump 100 are used in the underground heat exchanger 300. ) is transmitted to the ground. When the temperature is reduced by such heat exchange with the ground and the temperature of the heat storage fluid stored in the heat battery 200 reaches the second reference temperature, which is set to a temperature below the first reference temperature, the first pump is again pumped. (P1) operates, and the control valve (V) controls the heat exchange fluid pumped by the first pump (P1) to circulate between the heat pump 100 and the heat battery 200.

Lastly, referring to FIG. 5, when not only the first air conditioning load 21 but also the second air conditioning load 22 operates in a cooling mode, the heat pump 100 and the heat battery 200 operate in the first and second air conditioning load 22. 2Exchange heat with the air conditioning loads (21) and (22), respectively. To this end, the second and third pumps (P2) (P3) operate respectively, and the control valve (V) moves the heat exchange fluid pumped by the second pump (P2) to the heat pump 100 and the underground. Controlled to circulate between heat exchangers (300). Accordingly, the waste heat resulting from the cooling operation of the first air conditioning load 21 is transferred to the heat pump 100 and then transferred to the ground from the underground heat exchanger 300 by the heat exchange fluid. And waste heat resulting from the cooling operation of the second air conditioning load 22 is transferred to the heat storage fluid stored in the heat battery 200.

Even when the first and/or second air conditioning loads 21 and 22 operate in a heating mode, the first to third pumps P1, P2, and P3 allow the heat exchange fluid to flow in the same manner as described above. ) operation of one or two of the following and control of the control valve (V) will be performed. However, when the first and/or second air conditioning loads 21 and 22 operate in the heating mode, heat is transmitted from the heat storage fluid or the ground stored in the heat battery 200 to the heat pump 100. It will be delivered. Therefore, circulation of the heat exchange fluid between the heat pump 100 and the heat battery 200 or circulation of the heat exchange fluid between the heat pump 100, the heat battery 200, and the underground heat exchanger 300 Whether or not the temperature of the thermal storage fluid stored in the heat battery 200 exceeds a preset reference temperature will be determined.

Within the scope of the basic technical idea of the present invention, many other modifications are possible for those skilled in the art, and the scope of the present invention should be interpreted based on the appended claims. will be.

100: heat pump 200: heat battery
300: underground heat exchanger 310: heat exchange tube
321, 322: Header 400: Energy supply department
P1, P2, P3: pump V: valve

Claims (11)

A heat pump (100) that exchanges heat with the hot water supply load (10) or the first air conditioning load (21);
a heat battery 200 in which the heat exchange fluid circulating between the heat pump 100 exchanges heat with the heat storage fluid stored therein or the heat exchange fluid circulating between the second air conditioning load 22 exchanges heat with the heat storage fluid stored therein; and
At least one underground heat exchanger (300) in which the heat exchange fluid circulating between the heat pump (100) and the heat battery (200) or between the heat pump (100) exchanges heat with the ground; Includes rules,
When the heat pump 100 exchanges heat with the hot water supply load 10, the heat exchange fluid circulating between the heat pump 100 and the heat battery 200 is the heat storage fluid stored in the heat battery 200. exchange heat with
When only the first air conditioning load 21 operates in the cooling mode, the heat pump 100 exchanges heat with the first air conditioning load 21, depending on the temperature of the heat storage fluid stored in the heat battery 200, The heat exchange fluid circulating between the heat pump 100 and the heat battery 200 exchanges heat with the heat storage fluid stored in the heat battery 200, or the heat pump 100, the heat battery 200, and the ground heat exchange. The heat exchange fluid circulating between the units 300 exchanges heat with the heat storage fluid stored in the heat battery 200 and the ground, or the heat exchange fluid circulating between the heat pump 100 and the ground heat exchanger 300 exchanges heat with the ground,
When the first and second air conditioning loads 21 and 22 operate in the cooling mode, the heat pump 100 and the heat battery 200 operate with the first and second air conditioning loads 21 and 22, respectively. Heat exchange, regardless of the temperature of the heat storage fluid stored in the heat battery 200, the heat exchange fluid circulating between the heat pump 100 and the ground heat exchanger 300 exchanges heat with the ground, and the heat battery ( A heat storage type heat pump system including an underground heat exchanger, wherein the heat storage fluid stored in the heat storage fluid (200) exchanges heat with the heat exchange fluid circulating between the heat battery (200) and the second air conditioning load (22).
According to claim 1,
When the heat pump 100 exchanges heat with the first air conditioning load 21 operating in a cooling mode, the heat exchange fluid circulating between the heat pump 100 and the heat battery 200 is transferred to the heat battery ( After exchanging heat with the thermal storage fluid stored in 200), the temperature of the thermal storage fluid stored in the heat battery 200 is increased by heat exchange with the heat exchange fluid circulating between the heat pump 100 and the heat battery 200. When it increases and reaches the preset first reference temperature, the heat exchange fluid circulating between the heat pump 100, the heat battery 200, and the underground heat exchanger 300 is the heat storage fluid stored in the heat battery 200. A regenerative heat pump system including an underground heat exchanger that exchanges heat with.
According to claim 2,
When the heat pump 100 exchanges heat with the first air conditioning load 21 operating in a cooling mode, the heat pump 100, the heat battery 200, and the underground heat exchanger 300 circulate. When the temperature of the heat storage fluid stored in the heat battery 200 due to heat exchange with the heat exchange fluid reaches the second reference temperature, which is set to a temperature below the first reference temperature, the heat pump 100 and the heat battery ( 200) A heat storage type heat pump system including an underground heat exchanger in which the heat exchange fluid circulating between the heat exchangers exchanges heat with the heat storage fluid stored in the heat battery (200).
delete delete When the hot water supply load (10) or the first air conditioning load (21) operates, a heat pump (100) that exchanges heat with the hot water supply load (10) or the first air conditioning load (21);
a heat battery 200 in which the heat exchange fluid circulating between the heat pump 100 or the heat exchange fluid circulating between the second air conditioning load 22 exchanges heat with the heat storage fluid stored therein;
At least one underground heat exchanger (300) in which the heat exchange fluid circulating between the heat pump (100) and the heat battery (200) or between the heat pump (100) exchanges heat with the ground;
A first pump (P1) that pumps the heat exchange fluid between the heat pump 100 and the heat battery 200;
A second pump (P2) that pumps the heat exchange fluid between the heat pump 100, the heat battery 200, and the underground heat exchanger 300 or between the heat pump 100 and the underground heat exchanger 300;
A third pump (P3) that pumps the heat exchange fluid between the second air conditioning load (22) and the heat battery (200); and
Between at least two of the heat pump 100, the heat battery 200, and the underground heat exchanger 300 by the operation of at least one of the first to third pumps (P1) (P2) (P3) or A control valve (V) that controls the heat exchange fluid to circulate between the second air conditioning load (22) and the heat battery (200); Including,
When only the first air conditioning load 21 operates in the cooling mode, the first and second pumps P1 and P2 are selectively operated according to the temperature of the heat storage fluid stored in the heat battery 200,
When the second air conditioning load 22 operates in cooling mode, the third pump P3 operates,
The first and third pumps (P1) (P3) operate alternatively, and the second and third pumps (P2) (P3) operate independently.
delete According to claim 6,
When the hot water supply load 10 operates and the heat pump 100 exchanges heat with the hot water supply load 10,
The first pump (P1) operates, and the control valve (V) controls the heat exchange fluid pumped by the first pump (P1) to circulate between the heat pump 100 and the heat battery 200. A regenerative heat pump system including an underground heat exchanger.
According to claim 6,
When the first air conditioning load 21 operates in a cooling mode and the heat pump 100 exchanges heat with the first air conditioning load 21,
If the temperature of the heat storage fluid stored in the heat battery 200 is less than the preset first reference temperature, the first pump (P1) operates, and the control valve (V) is operated by the first pump (P1). Controlling the pressure-transported heat exchange fluid to circulate between the heat pump 100 and the heat battery 200,
When the temperature of the heat storage fluid stored in the heat battery 200 is higher than the first reference temperature, the second pump (P2) operates, and the control valve (V) pumps pressure by the second pump (P2). A regenerative heat pump system including a ground heat exchanger, which controls the heat exchange fluid to circulate between the heat pump (100), the heat battery (200), and the ground heat exchanger (300).
According to clause 9,
When the first air conditioning load 21 operates in a cooling mode and the heat pump 100 exchanges heat with the first air conditioning load 21,
Stored in the heat battery 200 by heat exchange with the heat exchange fluid that is pumped by the second pump (P2) and circulated between the heat pump 100, the heat battery 200, and the underground heat exchanger 300. When the temperature of the thermal storage fluid reaches the second reference temperature, which is set to a temperature lower than the first reference temperature, the first pump (P1) operates, and the control valve (V) operates the first pump (P1). A regenerative heat pump system including an underground heat exchanger that controls the heat exchange fluid pumped by to circulate between the heat pump (100) and the heat battery (200).
According to clause 9,
The first and second air conditioning loads 21 and 22 operate in a cooling mode, respectively, so that the heat pump 100 and the heat battery 200 operate with the first and second air conditioning loads 21 and 22, respectively. In case of heat exchange,
The second and third pumps (P2) and (P3) operate respectively, and the control valve (V) transfers the heat exchange fluid pumped by the second pump (P2) to the heat pump 100 and the underground heat exchanger. (300) A regenerative heat pump system including an underground heat exchanger, controlled to circulate between.

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