JP2005098543A - Heat using device for air conditioning - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat using device for air conditioning capable of using each of the heat obtained through a heat pump and the heat obtained from underground for a plurality of air conditioners. <P>SOLUTION: The heat using device for air conditioning has a branch circulation unit 6 for circulating a secondary heating medium from a secondary circulation unit 4, wherein the secondary heating medium is circulated to a fan coil unit C1 through a secondary heat exchanging part 1b of the heat pump 1, to an air conditioning floor panel C2 through a first opening/closing valve 8, and has a bypass part 7 for circulating a primary heating medium from a primary heating medium circulation unit 2, wherein the primary heating medium is circulated from a heat source through a primary heat exchanging part 1a of the heat pump 1, to the branch circulation unit 6 through a second opening/closing valve 9. The secondary heating medium obtained by using the heat pump 1 is supplied to the fan coil unit C1 by opening/closing the opening/closing valves 8 and 9, and while the secondary heating medium obtained by using the heat pump 1 and the primary heating medium directly obtained from underground are supplied to the air conditioning floor panel C2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat-use device for air conditioning that can use heat from a heat source for air-conditioning equipment.

Recently, in residential buildings, office buildings, public buildings, etc., the introduction of geothermal heat-use air-conditioning systems using low-temperature and constant-temperature geothermal resources is increasing for the purpose of reducing CO ₂ emissions and heat island phenomenon. In such a system, for example, when the heat collected from the ground during cooling in the summer is used directly for indoor air conditioning equipment, the temperature collected from the ground is not enough to cool the temperature required for cooling. . On the other hand, when heating in winter, the temperature collected from the ground is too low for the temperature required for heating. Therefore, a heat pump is used to compensate for the gap in the geothermal sampling temperature relative to the temperature required for heating or cooling, and by using the heat pump, the low-temperature and constant-temperature geothermal heat is increased or decreased, and during heating or cooling. A method of ensuring the necessary temperature is common.

  In the current market, there is no geothermal heat-conditioning system that uses a heat medium such as water directly for indoor air-conditioning equipment without using a heat pump, but it is a special snow melting device that melts snow on the road surface. There is a technique described in Japanese Unexamined Patent Publication No. 2002-173905 (hereinafter referred to as Patent Document 1). The technology described in Patent Document 1 releases heat by collecting heat collected from spring water and underground and heat flow obtained by using a heat pump and a hot water tank with respect to a radiator pipe buried directly under the road surface. In normal times, the spring heat collected by the spring sampler and the geothermal heat collected by the pile-type sampler are discharged from the radiator pipe buried directly under the road surface through the direct connection pipe part. When snow melts and the temperature of the road surface decreases, the spring water and geothermal heat are used as a heat source for the heat pump, and the antifreeze liquid in the hot water tank is heated to a high temperature with the obtained high heat, and the high temperature antifreeze liquid is dissipated in the heat It is a technology that melts snow by sending it to a pipe.

JP 2002-173905 A

  However, even if the technology described in Patent Document 1 is applied to an air conditioning system that uses the plurality of air conditioning devices, all the air conditioning devices are heat obtained through a heat pump, or heat collected from the ground, Only one of the heats can be used, and the different heats described above cannot be used simultaneously in each device. In order to use the heat obtained through the heat pump and the heat collected from the ground in each air conditioning equipment, the equipment described in Patent Document 1 is required for each air conditioning equipment. In addition, there is a problem that the cost increases because parts such as a heat pump are required for each air conditioning equipment.

  Therefore, an object of the present invention is to use air conditioning for heating and cooling that has a simple apparatus configuration and is low in cost, and can use heat obtained through a heat pump for a plurality of air conditioning equipment and heat collected from the ground respectively. Is to provide a device.

  The typical configuration of the present invention for achieving the above object mutually uses an endothermic action when vaporizing a substance or a heat releasing action when liquefying a substance in a primary side heat exchange part or a secondary side heat exchange part. A heat exchange unit that performs heat exchange, a primary circulation unit that circulates a primary heat medium from a heat source through a primary heat exchange unit of the heat exchange unit, and a primary heat medium in the primary circulation unit A secondary-side circulation unit that circulates a secondary-side heat medium to the first air-conditioning equipment through a secondary-side heat exchange unit of the heat exchange unit, and a secondary-side circulation unit A secondary-side circulation pump that circulates the secondary-side heat medium, and at least one of the secondary-side heat medium that circulates from the secondary-side circulation unit to the other air conditioning equipment via the first on-off valve A branch circulation part and a second circulation part from the primary circulation part And at least one bypass section for circulating a primary heat medium to the branch circulation section via an on-off valve, and by opening and closing the first and second on-off valves, Secondary side heat medium using heat exchange unit can be supplied, and secondary side heat medium using heat exchange unit or primary side heat medium from heat source can be supplied to other air conditioning units The heat medium is supplied to the first air conditioning equipment and the other air conditioning equipment at the same time or one of them.

  Alternatively, a heat exchange unit that performs heat exchange by mutually utilizing a heat absorption action when vaporizing a substance or a heat dissipation action when liquefying a substance in a primary heat exchange section or a secondary heat exchange section, and the heat exchange A primary-side circulation unit that circulates a primary-side heat medium from a heat source through a primary-side heat exchange unit of the unit; a primary-side circulation pump that circulates a primary-side heat medium in the primary-side circulation unit; and the heat exchange unit A secondary-side circulation unit that circulates a secondary-side heat medium to the first air-conditioning equipment through the secondary-side heat exchange unit, and a secondary-side circulation that circulates a secondary-side heat medium in the secondary-side circulation unit Pump, at least one branch circulation unit that circulates the secondary side heat medium from the secondary side circulation unit to other air conditioning equipment via the switching valve, and from the primary side circulation unit via the switching valve Heat medium on the primary side to the branch circulation section At least one bypass section to be circulated, and by switching the switching valve, a secondary heat medium using a heat exchange unit can be supplied to the first air conditioning equipment, and other air conditioning equipment Can be supplied with a secondary side heat medium using a heat exchange unit or a primary side heat medium from a heat source, and the heat medium can be supplied to the first air conditioner and other air conditioners at the same time or It supplies to either one, It is characterized by the above-mentioned.

  According to the above configuration, even when the present apparatus is used for a plurality of air conditioners, a secondary output port that can be selected from two temperatures is provided in addition to the secondary output port fixed at one temperature. Therefore, among the plurality of air conditioners, the heat exchange unit is used for the other air conditioners while using the heat obtained by using the heat exchange unit for the first air conditioner. It is possible to use the heat obtained in this way or the heat obtained directly from the heat source. As a result, it is possible to supply a heat medium having two temperatures suitable for each air conditioner, and the first air conditioner and other air conditioners can be efficiently and efficiently operated simultaneously with one air conditioner. it can.

  In addition, for example, when the heat obtained from the heat source is directly used only for other air-conditioning equipment, the operation can be realized only by the power consumption of the primary circulation pump, so that the operation at a low running cost can be realized.

  In addition, since the primary side heat medium is circulated in the bypass part using the primary side circulation pump, and the secondary side heat medium is circulated in the branch circulation part using the secondary side circulation pump. Even if there are a plurality of other air conditioning units, there is no need to provide a separate pump, the apparatus configuration is simple, and the cost is low.

  According to the present invention, by opening and closing the first and second on-off valves or switching the switching valve, a secondary heat medium using a heat exchange unit can be supplied to the first air-conditioning equipment. A secondary side heat medium using a heat exchange unit or a primary side heat medium from a heat source can be supplied to other air conditioners, and the heat medium is supplied to the first air conditioner and other air conditioners. In contrast, since it is configured to be supplied to either one or the other at the same time, even if this apparatus is used for a plurality of air conditioning equipment of different systems, a heat exchange unit is used for the plurality of air conditioning equipment. Not only using the obtained heat, but also using the heat obtained by using the heat exchange unit for the first air-conditioning device among the plurality of air-conditioning devices, while using the heat source for other air-conditioning devices It is possible to use heat directly obtained fromThereby, a plurality of air-conditioning equipment can be efficiently operated simultaneously with one main heat-use device for air-conditioning and heating, and a plurality of air-conditioning equipment can be comfortably used while reducing energy consumption.

  In addition, among the plurality of air conditioners, for example, when the heat obtained from the heat source is directly used only for other air conditioners, the operation can be realized only by the power consumption of the circulation pump on the primary side. Operation by cost can be realized.

  In addition, when circulating the heat medium to other air conditioning equipment, when circulating the primary side heat medium, which is the heat medium from the heat source, through the bypass section, the primary side circulation pump is used to exchange heat. When circulating the secondary side heat medium, which is a heat medium using the unit, to the branch circulation unit, a secondary side circulation pump is used, so a separate pump is provided even if there are multiple other air conditioning units. There is no need, the apparatus configuration is simple, and the cost is low.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In the following description, a case where the air-conditioning heat utilization apparatus according to the present invention is applied to a geothermal utilization system that uses heat collected from the ground for air-conditioning equipment will be described as an example.

[First Embodiment]
As shown in FIG. 1, the heating / cooling utilization apparatus A includes a heat exchange unit 1, a primary side circulation unit 2 having a primary side circulation pump 3, and a secondary side circulation unit having a secondary side circulation pump 5. 4, a branch circulation unit 6, and a bypass unit 7.

  When the heat pump unit 1 as the heat exchange unit wants to obtain a temperature higher than the heat collected from the ground (at the time of heating), the heat absorption at the time of vaporizing the substance in the primary heat exchange unit 1a on the input side The heat (temperature) necessary for heating is ensured by utilizing the heat radiation action when the substance is liquefied in the secondary heat exchange section 1b on the output side. On the other hand, when it is desired to obtain a temperature lower than the heat collected from the ground (at the time of cooling), the heat dissipating action when the substance is liquefied in the primary heat exchange section 1a on the input side is changed to the secondary on the output side. The heat (temperature) necessary for cooling is ensured by utilizing the endothermic action when the substance is vaporized in the side heat exchange section 1b. In this way, the heat pump unit 1 performs heat exchange by mutually utilizing the heat absorption action when the substance is vaporized or the heat release action when the substance is liquefied in the primary side heat exchange part 1a or the secondary side heat exchange part 1b. It is a heat exchange unit.

  The primary side circulation unit 2 circulates the primary side heat medium from the heat source through the primary side heat exchange unit 1 a of the heat pump unit 1. In the primary side circulation unit 2, the heat medium from the underground heat collection unit B as a heat source is circulated through the primary side heat exchange unit 1 a of the heat pump unit 1. In the path of the primary side circulation unit 2, a primary side circulation pump 3 for circulating the primary side heat medium is provided.

  In the present embodiment, as the heat source, a case where a ground heat collection unit B that collects heat from the ground using the buried pipe 11 for heat exchange buried in the ground is illustrated. The temperature in the ground is relatively stable throughout the year, is relatively stable, and is low in the summer relative to the outside temperature and high in the winter. The underground heat collecting unit B is configured to pass a heat medium through the pipe of the heat exchanging buried pipe 11 buried in the ground and exchange heat with the soil in the ground through the pipe.

  In addition, as the buried pipe 11 for heat exchange, for example, an existing pile such as a steel pipe pile, a concrete pile, and a soil cement composite pile in which a soil cement pillar and a steel pipe pile are integrated may be used. The buried pile is not limited to the above-mentioned pre-built pile, and any other buried pipe may be used as long as it is buried in the ground to collect heat from the ground. In addition, examples of the heat medium include water, oil, antifreeze, and air. In addition, when filling the space for the heat exchange pipe and the buried pipe main body, as the filler, water, oil, antifreeze, sand, gravel, pulverized lightweight concrete, concrete, metal pieces, Examples include steel balls and stainless steel spheres.

  The secondary-side circulation unit 4 circulates a secondary-side heat medium to the first air conditioning equipment C1 through the secondary-side heat exchange unit 1b of the heat pump unit 1. In this embodiment, the fan coil unit C1 is illustrated as 1st air conditioning equipment. The fan coil unit C1 has a function of dehumidifying the room by circulating water as a heat medium in a coil part (pipe part) in the unit and causing condensation in the coil part. The dehumidifying function of the fan coil unit C1 exhibits the same ability as the dehumidifying function of a normal air conditioner. Further, it is possible to blow air (cooling with cold air or heating with hot air) by circulating water through the coil portion in the unit and rotating the fan through the coil portion.

  In the secondary side circulation unit 4, water as a secondary heat medium is circulated through the secondary side heat exchange unit 1 b of the heat pump unit 1 with respect to the fan coil unit C <b> 1. A secondary-side circulation pump 5 for circulating the secondary-side heat medium is provided in the path of the secondary-side circulation unit 4.

  The branch circulation unit 6 circulates a secondary heat medium from the secondary side circulation unit 4 to the other air conditioning equipment C2 via the first on-off valve 8. In this embodiment, the air conditioning floor panel C2 is illustrated as another air conditioning equipment. The cooling / heating floor panel C2 has been conventionally used only for floor heating, but in the present embodiment, similarly to heating, the floor is appropriately cooled by directly circulating a heat medium to the floor panel during cooling. Thus, a cool feeling can be obtained without causing condensation on the floor surface.

  The bypass unit 7 circulates a primary heat medium from the primary side circulation unit 2 to the branch circulation unit 6 via a second on-off valve 9. The bypass unit 7 is for directly circulating water as a heat medium on the primary side with respect to the cooling / heating floor panel C2 without passing through the heat pump unit 1.

  In the heating / cooling heat utilization apparatus A having the above-described configuration, by opening and closing the first and second on-off valves 8 and 9, a secondary side heat medium using the heat pump unit 1 can be supplied to the fan coil unit C1. Yes, a secondary side heat medium using the heat pump unit 1 or a primary side heat medium obtained directly from the underground heat sampling unit B can be supplied to the air conditioning floor panel C2, and the heat medium is supplied to the fan coil. The unit C1 and the heating / cooling floor panel C2 are supplied simultaneously or one of them.

  Specifically, during cooling, the first on-off valve 8 from the secondary circulation unit 4 to the branch circulation unit 6 is closed and the primary circulation unit 2 to the bypass unit 7 as shown in FIG. By opening the second on-off valve 9, the fan coil unit C1 uses the secondary side heat medium passed through the heat pump unit 1 as a heat source, and the cooling / heating floor panel C2 obtained directly from the ground heat collection unit B The heat medium on the primary side can be used as a heat source.

  In general, low-temperature chilled water (heat medium) of 7 ° C to 10 ° C is required for air conditioning equipment for dehumidification purposes, and chilled water (heat medium) of about 15 ° C to 20 ° C is sufficiently effective for cooling equipment using cooling radiation. Is obtained. Therefore, the chilled water (secondary heat medium) cooled by the heat pump unit 1 was obtained from the ground heat collection unit B for the cooling / heating floor panel C2 for the fan coil unit C1 for dehumidification. By selectively or simultaneously supplying cold water (a heat medium on the primary side), it is possible to operate efficiently with the above-described heat-use device for air conditioning.

  On the other hand, at the time of heating, as shown in FIG. 1B, the second on-off valve 9 from the primary side circulation unit 2 to the bypass unit 7 is closed, and the first from the secondary side circulation unit 4 to the branch circulation unit 6 is closed. By opening the open / close valve 8, the secondary side heat medium that has passed through the heat pump unit 1 in both the fan coil unit C1 and the cooling / heating floor panel C2 can be used as a heat source.

  Therefore, the fan coil unit C1 as the first air conditioning / heating device uses the heat pump unit 1 both during cooling and during heating, and in the summer, the water becomes lower than the underground temperature through the heat pump unit 1 (two The inside of the room is dehumidified and cooled by circulating the heat medium on the secondary side and causing condensation in the coil portion. In winter, water (secondary heat medium) higher in temperature than the underground temperature is circulated through the heat pump unit 1 to blow and warm the hot air.

  On the other hand, the cooling / heating floor panel C2 as another cooling / heating device cools the floor by directly circulating water (primary heat medium) cooled in the ground during cooling. During heating, high-temperature water (secondary heat medium) is circulated through the heat pump unit 1 to warm the floor. Note that the cooling / heating floor panel C2 is not used simultaneously with the fan coil unit C1 at the time of cooling, but the cooling effect can be obtained only by floor cooling by directly circulating the heat medium on the primary side. Therefore, for example, when the heat obtained from the underground heat collection unit B is directly used only for the cooling / heating floor panel C2, the cooling operation can be realized only by the power consumption of the primary-side circulation pump 3, thereby reducing the running cost. Cooling operation by can be realized. Further, since the cold water temperature (the temperature of the heat medium on the primary side) does not become too low, there is an advantage that a cool feeling can be obtained without causing condensation on the floor surface and inside the floor due to overcooling.

  In the above heat utilization device, the drive of the heat pump unit 1 and the circulation pumps 3 and 5 and the opening and closing of the on-off valves 8 and 9 can be operated by manual ON / OFF or switching. It is also possible to perform automatically using. In the case of automatic control, for example, the temperature of the underground heat or the temperature inside or outside the room is detected using a detection means such as a sensor, and based on this detection information, the heat pump unit 1 and the circulation pumps 3 and 5 are driven. The on-off valves 8 and 9 may be appropriately opened / closed according to the use of each air conditioner.

  As described above, even if the present apparatus is used for a plurality of different types of air-conditioning equipment, according to the present embodiment, the fan coil unit is opened and closed by opening and closing the first and second on-off valves 8 and 9. For C1, the heat obtained by using the heat pump unit 1 during cooling and heating is used, and for the cooling and heating floor panel C2, the heat directly obtained from the underground heat sampling unit B during cooling is used, and the heat pump unit is used during heating. Thus, the heat obtained can be selectively used. Thereby, a plurality of air-conditioning equipment can be efficiently operated simultaneously with one main heat-use device for air-conditioning and heating, and a plurality of air-conditioning equipment can be comfortably used while reducing energy consumption.

  In addition, the primary side heat medium is circulated in the bypass section 7 using the primary side circulation pump 3, and the secondary side heat medium is circulated in the branch circulation section 6 using the secondary side circulation pump 5. Therefore, even if there are a plurality of air conditioning units, there is no need to provide a separate pump, the apparatus configuration is simplified, and the cost is low. In addition, there is no need to provide a circulation pump for each air-conditioning equipment, and simultaneous use and selective use of two temperatures (temperature through the heat pump unit and temperature directly taken from the ground) can be performed by simply selecting on / off of the on / off valve. For this reason, the number of operating parts of the apparatus is reduced as compared with the conventional one, and the reliability of the apparatus is improved.

[Second Embodiment]
In the embodiment described above, the branch circulation unit 6 serving as a heat medium path from the secondary-side circulation unit 4 to the cooling / heating floor panel C2 and the bypass serving as the heat medium path from the primary-side circulation unit 2 to the cooling / heating floor panel C2. The configuration in which the first on-off valve 8 and the second on-off valve 9 are arranged in the portion 7 is illustrated, but the present invention is not limited to this. For example, as shown in FIG. 2, a switching valve 10 such as a three-way valve may be arranged at the junction of the branch circulation unit 6 and the bypass unit 7. Also by configuring in this way, the same use as that of the first embodiment described above is possible. In addition, since the other structure is the same as that of embodiment mentioned above, the same code | symbol is attached | subjected to the member which has an equivalent function, and description is abbreviate | omitted.

  According to the configuration of the present embodiment, during cooling, as shown in FIG. 2A, when only the path from the primary circulation unit 2 to the cooling / heating floor panel C2 is opened by the switching valve 10 in the above-described junction, In the coil unit C1, the secondary side heat medium passed through the heat pump unit 1 can be used as a heat source, and in the cooling / heating floor panel C2, the primary side heat medium directly obtained from the underground heat collection unit B can be used as a heat source. .

  On the other hand, during heating, as shown in FIG. 2 (b), when only the path from the secondary circulation unit 4 to the cooling / heating floor panel C2 is opened by the switching valve 10 in the junction, the fan coil unit C1 and the cooling / heating floor are opened. The heat medium on the secondary side that has passed through the heat pump unit 1 can be used as a heat source in both panels C2.

  The cooling / heating floor panel C2 is not used simultaneously with the above-described fan coil unit C1 at the time of cooling, but the cooling effect can be obtained only by floor cooling by directly circulating the heat medium on the primary side. Therefore, for example, when the heat obtained from the underground heat collection unit B is directly used only for the cooling / heating floor panel C2, the cooling operation can be realized only by the power consumption of the primary-side circulation pump 3, thereby reducing the running cost. Cooling operation by can be realized. Further, since the cold water temperature (the temperature of the heat medium on the primary side) does not become too low, there is an advantage that a cool feeling can be obtained without causing condensation on the floor surface and inside the floor due to overcooling.

  As described above, according to the present embodiment, not only the same effects as those of the first embodiment described above can be obtained, but also the number of valves is reduced as compared with the embodiment, so that the cost is reduced. The apparatus configuration is further simplified.

  Moreover, according to this embodiment, with respect to other air-conditioning / heating equipment (air-conditioning floor panel C2 in FIG. 2), the use selection of the two temperatures of the temperature via the heat pump unit and the temperature directly collected from the ground is switched to one. Since this can be done by simply switching the valve, the reliability of the apparatus is further improved by reducing the number of operating parts for selective use.

[Other Embodiments]
In the above-described embodiment, the case where the underground heat is used as the heat source is exemplified, but the present invention is not limited to this. For example, solar heat may be used. In this case, with respect to a cooling / heating floor panel as another cooling / heating device, heat obtained by using a heat pump unit at the time of cooling and heat directly obtained from solar heat at the time of heating may be used. Therefore, for example, when the heat obtained from solar heat is directly used only for the cooling / heating floor panel, the heating operation can be realized only by the power consumption of the circulation pump on the primary side, so that the heating operation at a low running cost can be realized.

  Moreover, although embodiment mentioned above illustrated the case where there was one other air conditioning apparatus, it is not limited to this, There may be two or more other air conditioning apparatuses. In this case, what is necessary is just to provide the above-mentioned branch circulation part and bypass part according to the number of other air-conditioning / heating equipment. Thus, even if there are a plurality of other air conditioning units, the primary side circulation medium 3 is circulated through the plurality of bypass units 7 using the primary side circulation pump 3, and the secondary side circulation pump 5 is used. Therefore, since the secondary side heat medium can be circulated through the plurality of branch circulation units 6, a plurality of other air conditioning devices can be used without providing a separate pump. In addition, when there are other air-conditioning devices that are not used in a plurality of other air-conditioning devices, it is possible to effectively use only the other air-conditioning devices that are required by operating the above-described on-off valve or switching valve. it can. Furthermore, a plurality of air conditioners can be comfortably used while reducing energy consumption.

  In the above-described embodiment, the fan coil unit and the cooling / heating floor panel of different systems are exemplified as the cooling / heating apparatus. However, a plurality of similar cooling / heating apparatuses may be used. Moreover, although the fan coil unit and the air-conditioning floor panel were illustrated as an air-conditioning apparatus, it is not limited to this. For example, it is not limited to the air conditioner or the floor, but may be a device other than the air conditioner exemplified in the above-described embodiment, such as an air conditioner that pipes on a wall, ceiling, roof, etc. and circulates the heat medium in the pipe. The above-described heat-use device for air conditioning according to the present invention is also effective in an air-conditioning system that uses these air-conditioning equipment in an appropriate combination.

  As an application example of the present invention, the present invention can be applied to energy-saving air conditioning by floor cooling in an open space in an office building, a public building or the like other than a house.

It is a schematic explanatory drawing of the geothermal utilization system provided with the heat utilization apparatus for air conditioning which concerns on 1st Embodiment of this invention. It is a model explanatory drawing of the geothermal utilization system provided with the heat utilization apparatus for air conditioning which concerns on 2nd Embodiment of this invention.

Explanation of symbols

A ... Utilizing device for air conditioning B ... Ground heat sampling unit (heat source)
C1 ... Fan coil unit (first air conditioning unit)
C2 ... Air conditioning floor panel (second air conditioning equipment)
1 ... Heat pump unit (heat exchange unit)
DESCRIPTION OF SYMBOLS 1a ... Primary side heat exchange part 1b ... Secondary side heat exchange part 2 ... Primary side circulation part 3 ... Primary side circulation pump 4 ... Secondary side circulation part 5 ... Secondary side circulation pump 6 ... Branch circulation part 7 ... Bypass section 8 ... first on-off valve 9 ... second on-off valve 10 ... switching valve 11 ... buried pipe for heat exchange

Claims (2)

A heat exchange unit for exchanging heat by mutually utilizing an endothermic action when vaporizing a substance or a radiating action when liquefying a substance in a primary side heat exchange part or a secondary side heat exchange part;
A primary-side circulation unit that circulates a primary-side heat medium from a heat source through a primary-side heat exchange unit of the heat exchange unit;
A primary-side circulation pump that circulates a primary-side heat medium in the primary-side circulation section;
A secondary-side circulation unit that circulates a secondary-side heat medium to the first air conditioning equipment through the secondary-side heat exchange unit of the heat exchange unit;
A secondary-side circulation pump for circulating a secondary-side heat medium in the secondary-side circulation section;
At least one branch circulation unit that circulates the secondary side heat medium from the secondary side circulation unit to other air conditioning equipment via the first on-off valve;
And at least one bypass part that circulates a heat medium on the primary side from the primary side circulation part to the branch circulation part via a second on-off valve,
By opening and closing the first and second on-off valves, a secondary heat medium using a heat exchange unit can be supplied to the first air conditioning equipment, and heat exchange can be performed for other air conditioning equipment. The secondary side heat medium using the unit or the primary side heat medium from the heat source can be supplied, and the heat medium is supplied to the first air conditioner and the other air conditioner at the same time or one of them. A heat utilization device for air conditioning that is characterized by the above. A heat exchange unit for exchanging heat by mutually utilizing an endothermic action when vaporizing a substance or a radiating action when liquefying a substance in a primary side heat exchange part or a secondary side heat exchange part;
A primary-side circulation unit that circulates a primary-side heat medium from a heat source through a primary-side heat exchange unit of the heat exchange unit;
A primary-side circulation pump that circulates a primary-side heat medium in the primary-side circulation section;
A secondary-side circulation unit that circulates a secondary-side heat medium to the first air conditioning equipment through the secondary-side heat exchange unit of the heat exchange unit;
A secondary-side circulation pump for circulating a secondary-side heat medium in the secondary-side circulation section;
At least one branch circulation unit that circulates the heat medium on the secondary side from the secondary side circulation unit to other air conditioning equipment via a switching valve;
And at least one bypass unit that circulates a heat medium on the primary side from the primary side circulation unit to the branch circulation unit via the switching valve,
By switching the switching valve, a secondary heat medium using a heat exchange unit can be supplied to the first air conditioning equipment, and a secondary using a heat exchange unit can be used for the other air conditioning equipment. A heating medium on the primary side from a heating medium on the side or a heat source can be supplied, and the heating medium is supplied to the first cooling / heating apparatus and the other cooling / heating apparatus simultaneously or one of them. Heat utilization equipment.

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