JP4376023B2 - Heat utilization equipment for air conditioning - Google Patents

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 CO2 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 with respect to the temperature required for 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.

A heat exchange unit that exchanges heat by mutually utilizing an endothermic action when vaporizing a substance or a radiating action when liquefying a substance in the primary side heat exchange section (1a) or the secondary side heat exchange section (1b) ( 1) , a primary circulation unit (2) for circulating a primary heat medium from a heat source (B) through a primary heat exchange unit (1a) of a heat exchange unit (1) , and a primary circulation unit (2) In the primary side circulation pump (3) for circulating the primary side heat medium and the secondary side heat exchange section (1b) of the heat exchange unit (1) to the first cooling / heating equipment (C1) . A secondary-side circulation section (4) for circulating the medium, a secondary-side circulation pump (5) for circulating the secondary-side heat medium in the secondary-side circulation section (4) , and a secondary-side heat exchange section ( 1b) and the first air conditioner (C1) branch from the secondary side circulation section (4) to another air conditioner (C2) is configured to join the secondary side circulation unit (4) between the first air conditioning unit (C1) and the secondary side heat exchanging unit (1b), and further other air conditioning unit Between the at least one branch circulation part (6) and the heat source (B) and the primary side heat exchange part (1a) in which the first on-off valves (8, 8 ') are respectively interposed before and after (C2) Branch from the primary side circulation part (2), join the branch circulation part (6) between the first on-off valve (8) on the branch side and the other air conditioning equipment (C2), and other air conditioning equipment ( C2) and the first on-off valve (8 ') on the merge side branch from the branch circulation section (6), and the primary side circulation section between the primary side heat exchange section (1a) and the heat source (B). Further, the second on-off valve (9, 9 ') is provided in the vicinity of the junction between the branch from the primary circulation unit (2) and the junction with the primary circulation unit (2). Each intervening And, at least one bypass section (7), provided with, at the time of conditioning in summer, the first on-off valve (8, 8 ') closed, as opened second opening and closing valve (9, 9') The primary side heat medium is simultaneously supplied to the primary side heat exchange part (1a) and the bypass part (7) of the heat exchange unit (1), and the heat exchange unit (1) is supplied to the first air conditioning equipment (C1). While supplying the secondary-side heat medium using the air, it is possible to supply the primary-side heat medium to the other air conditioning equipment (C2) via the bypass section (7) and the branch circulation section (6). When heating in winter, the first on-off valve (8, 8 ') is opened and the second on-off valve (9, 9') is closed. 1) Supply only to the primary side heat exchange section (1a), and connect to the first air conditioning equipment (C1) and other air conditioning equipment (C2). Characterized by being configured to be able to supply heat medium on the secondary side using thermal exchange unit (1) Te.

In addition, heat exchange is performed by mutually utilizing heat absorption when vaporizing a substance or heat dissipation when liquefying a substance in the primary side heat exchange part (1a) or the secondary side heat exchange part (1b) . a unit (1), the primary side circulation unit for circulating the heat medium in the primary side from the heat source through the primary heat exchange unit (1a) (B) of the heat exchanger unit (1) and (2), the primary side circulation unit ( 2) The primary side circulation pump (3) that circulates the primary side heat medium and the secondary side heat exchange section (1b) of the heat exchange unit (1) to the first air conditioning equipment (C1) on the secondary side The secondary side circulation part (4) for circulating the heat medium, the secondary side circulation pump (5) for circulating the secondary side heat medium in the secondary side circulation part (4) , and the secondary side heat exchange Branch from the secondary circulation part (4) between the part (1b) and the first air conditioning equipment (C1) It is configured to join the secondary circulation unit (4) between the first cooling / heating appliance (C1) and the secondary heat exchange unit (1b) via the chamber device (C2), and Between the at least one branch circulation part (6) and the heat source (B) and the primary side heat exchange part (1a) in which switching valves (10, 10 ') are respectively interposed before and after the air conditioning equipment (C2). It branches from the primary side circulation part (2), joins the branch circulation part (6) between the switching valve (10) on the branch side and the other air conditioning equipment (C2), and joins with the other air conditioning equipment (C2) Branch from the branch circulation section (6) to the switching valve (10 ') on the side, and join the primary circulation section (2) between the primary heat exchange section (1a) and the heat source (B) configured to, with the at least one bypass section (7), provided with, at the time of conditioning in summer, the secondary circulation unit by operating the changeover valves (10,10 ') ( ) To suppress the circulation of the secondary side heat medium from the branch circulation part (6) and to allow the circulation of the primary side heat medium from the bypass part (7) to the branch circulation part (6) Side heat medium is simultaneously supplied to the primary heat exchange section (1a) and the bypass section (7) of the heat exchange unit (1), and the heat exchange unit (1) is used for the first air conditioning equipment (C1). The primary side heat medium can be supplied to the other air conditioning equipment (C2) through the bypass part (7) and the branch circulation part (6) while supplying the secondary side heat medium. During heating in winter, the operation of the switching valve (10, 10 ') allows the circulation of the secondary heat medium from the secondary circulation part (4) to the branch circulation part (6), and bypass part ( 7) and the primary side heat medium as a state of inhibiting the circulation of the primary side heat medium to the branch circulation part (6) The secondary side which supplied only to the primary side heat exchange part (1a) of the exchange unit (1) and used the heat exchange unit (1) for the first air conditioning equipment (C1) and the other air conditioning equipment (C2) It is characterized in that the heat medium can be supplied.

According to the above configuration, by opening and closing the first and second on-off valves or switching the switching valve, a secondary side 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 the heat directly obtained from . 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, 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 it can be configured at low cost .

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In the following description, a case will be described in which 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.

[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 cold water (heat medium) of 7 ° C to 10 ° C is required for air conditioning equipment for dehumidification purposes, and cold water (heat medium) of about 15 ° C to 20 ° C is sufficiently effective for air conditioning equipment using cold 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.

A ... Heating / cooling equipment B ... Geothermal 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 , 8 ' ... first on-off valve 9 , 9' ... second on-off valve 10 , 10 ' ... switching valve 11 ... buried pipe for heat exchange

Claims (2)

A heat exchange unit that exchanges heat by mutually utilizing an endothermic action when vaporizing a substance or a radiating action when liquefying a substance in the primary side heat exchange section (1a) or the secondary side heat exchange section (1b) ( 1) and
Primary circulation unit for circulating the heat medium in the primary side of the heat source (B) through the primary-side heat exchanger (1a) of the heat exchanger unit (1) and (2),
A primary-side circulation pump (3) for circulating the primary-side heat medium in the primary-side circulation section (2) ;
A secondary-side circulation unit (4) for circulating the secondary-side heat medium to the first cooling / heating device (C1) through the secondary-side heat exchange unit (1b) of the heat exchange unit (1) ;
A secondary circulation pump (5) for circulating the secondary side heat medium in the secondary circulation section (4) ;
A branch from the secondary-side circulation unit (4) between the secondary-side heat exchange unit (1b) and the first air-conditioning / heating device (C1) and the other air-conditioning / equipment (C2), the first air-conditioning / heating It is constituted so that it may join to a secondary side circulation part (4) between apparatus (C1) and a secondary side heat exchange part (1b), and also the 1st on-off valve before and behind other air-conditioning equipment (C2) At least one branch circulation part (6) interposing (8, 8 ') respectively;
It branches from a primary side circulation part (2) between a heat source (B) and a primary side heat exchange part (1a), and between the 1st on-off valve (8) of a branch side, and another air-conditioning equipment (C2) To the branch circulation section (6), branch from the branch circulation section (6) between the other air conditioning equipment (C2) and the first on-off valve (8 ') on the merge side, and the primary heat exchange section (1a) and the heat source (B) are configured to merge with the primary circulation part (2), and further, with the branch part from the primary circulation part (2) and the primary circulation part (2). And at least one bypass part (7) with a second on-off valve (9, 9 ') interposed in the vicinity of the merging part ,
During cooling in summer, the first on-off valve (8, 8 ') is closed and the second on-off valve (9, 9') is opened, and the primary heat medium is used as the primary heat exchange unit (1). While supplying to the side heat exchange part (1a) and the bypass part (7) at the same time and supplying the secondary side heat medium using the heat exchange unit (1) to the first air conditioning equipment (C1), etc. For the air conditioning equipment (C2), the primary side heat medium can be supplied via the bypass section (7) and the branch circulation section (6),
During heating in winter, the first on-off valve (8, 8 ') is opened and the second on-off valve (9, 9') is closed, and the primary heat medium is used as the primary heat exchange unit (1). It can supply only to the side heat exchange part (1a), and can supply the secondary side heat medium using the heat exchange unit (1) to the first air conditioning equipment (C1) and the other air conditioning equipment (C2). A heat-use device for air conditioning that is configured as described above. A heat exchange unit that exchanges heat by mutually utilizing an endothermic action when vaporizing a substance or a radiating action when liquefying a substance in the primary side heat exchange section (1a) or the secondary side heat exchange section (1b) ( 1) and
Primary circulation unit for circulating the heat medium in the primary side of the heat source (B) through the primary-side heat exchanger (1a) of the heat exchanger unit (1) and (2),
A primary-side circulation pump (3) for circulating the primary-side heat medium in the primary-side circulation section (2) ;
A secondary-side circulation unit (4) for circulating the secondary-side heat medium to the first cooling / heating device (C1) through the secondary-side heat exchange unit (1b) of the heat exchange unit (1) ;
A secondary circulation pump (5) for circulating the secondary side heat medium in the secondary circulation section (4) ;
A branch from the secondary-side circulation unit (4) between the secondary-side heat exchange unit (1b) and the first air-conditioning / heating device (C1) and the other air-conditioning / equipment (C2), the first air-conditioning / heating It comprises so that it may join a secondary side circulation part (4) between apparatus (C1) and a secondary side heat exchange part (1b), and also a switching valve (10, At least one branch circulation part (6) interposing 10 ′) ,
Branches from the primary circulation part (2) between the heat source (B) and the primary heat exchange part (1a), and circulates between the branch-side switching valve (10) and the other air conditioning equipment (C2). To the part (6), branch from the branch circulation part (6) between the other air-conditioning equipment (C2) and the switching valve (10 ') on the joining side, the primary side heat exchange part (1a) and the heat source ( B) and at least one bypass section (7) configured to merge with the primary circulation section (2) between
During cooling in summer, the circulation of the secondary heat medium from the secondary circulation part (4) to the branch circulation part (6) is suppressed by operating the switching valve (10, 10 '), and the bypass part (7) As a state in which the circulation of the primary side heat medium to the branch circulation part (6) is permitted, the primary side heat medium is transferred to the primary side heat exchange part (1a) and the bypass part (7) of the heat exchange unit (1). While supplying the secondary side heat medium using the heat exchange unit (1) to the first air conditioning equipment (C1) at the same time, the bypass section (7) for the other air conditioning equipment (C2) ) And the branch circulation section (6) so that the primary side heat medium can be supplied,
During heating in winter, the operation of the switching valve (10, 10 ') allows the circulation of the secondary heat medium from the secondary circulation part (4) to the branch circulation part (6), and bypass part (7). As a state in which the circulation of the primary heat medium to the branch circulation section (6) is suppressed, the primary heat medium is supplied only to the primary heat exchange section (1a) of the heat exchange unit (1), and the first A heat utilization device for air conditioning that is configured to supply a secondary heat medium using the heat exchange unit (1) to the other air conditioning device (C1) and the other air conditioning device (C2) .

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