JP7436155B2 - air conditioning system - Google Patents

Description

The present invention relates to an air conditioning system installed inside a building.

As air conditioning systems inside buildings, VAV (Variable Air Volume) air conditioning systems and four-pipe central heat source systems have been widely used. A VAV air conditioning system consists of an air volume adjustment mechanism (VAV) that controls the room temperature of each of multiple control zones, an air conditioner consisting of a fan, a hot and cold water coil, a humidifier or a filter, and ducts for conveying air. Ru. The cold/hot water coil inside the air conditioner is supplied with cold or hot water from a four-pipe central heat source system, cools or heats the air returned from the room (return air), or the outside air introduced into the room, and turns on the fan. Use this to blow air into the room. The four-pipe central heat source system is composed of heat source equipment for producing cold water and hot water (performing cooling and heating), a pump for water conveyance, and piping. As for piping, an outgoing pipe and a return pipe are required for passing cold water and hot water, respectively, and four pipes are required, so it is called a four-pipe type. Air conditioning requests from inside a building may switch between cooling and heating during the day. Therefore, in order to respond flexibly and easily to heating and cooling requirements, a four-pipe system is often adopted.

However, when adopting a four-pipe system, especially in high-rise buildings or large-scale buildings, the diameter of the pipes may become thicker or the system division may become complicated, resulting in improvements in terms of space and cost for piping arrangement. There is room for Particularly in recent years, in highly insulated or highly airtight buildings, cold water may be required from the indoor side even during the winter. Furthermore, when the introduced outside air is low temperature and low humidity, heating and humidification may be performed to meet the demand for hot water. In order to respond flexibly to these demands, it is desirable to perform heat recovery or the like to efficiently produce heat. However, since cold water demand and hot water demand change over time and may not be balanced, a problem may arise in that heat recovery cannot be performed efficiently.

An object of the present invention is to provide an air conditioning system that can efficiently produce and recover heat.

The air conditioning system according to the present invention is provided in at least one of a plurality of loops for conveying a heat medium, and performs heating and/or cooling for the heat medium conveyed in the loops. a temperature control unit; and a heat exchanger that is provided between at least any two of the plurality of loops and performs heat exchange between the heat medium of the two loops, and the plurality of loops are connected to an air conditioner. The air conditioner loop includes a plurality of air conditioner loops to which the air conditioner is connected, and a heat source loop connected to each of the plurality of air conditioner loops, and the plurality of air conditioner loops exchange heat with each other via the heat source loop, The plurality of heat exchangers include a first heat exchanger and a second heat exchanger, and the plurality of air conditioner loops include a first heat exchanger connected to the heat source loop via the first heat exchanger. an air conditioner loop, and a second air conditioner loop connected to the heat source loop via a second heat exchanger, each of the heat source loop, the first air conditioner loop, and the second air conditioner loop The temperature control unit of the first air conditioner loop and the temperature control unit of the second air conditioner loop each control the temperature of the heat medium , and the temperature control unit of the first air conditioner loop and the second air conditioner loop control the temperature of the heat medium. Each of the air conditioner loops includes an air conditioner, an outside conditioner, and a temperature control section connected to each of the air conditioner and the outside conditioner, and each of the first air conditioner loop and the second air conditioner loop The temperature control section includes a water heat source heat pump connected to each of the air conditioner and the outdoor conditioner, and each of the first air conditioner loop and the second air conditioner loop is provided with the air conditioner and the temperature control section. a first flow path and a second flow path provided with a temperature control section and an external conditioner, and the temperature control section controls the temperature of either the first flow path or the second flow path. Take control .

This air conditioning system is provided with a plurality of loops that transport the heat medium, and at least one of the plurality of loops includes a temperature control unit that heats and/or cools the heat medium. Therefore, temperature control of the heat medium in the loop can be realized by the temperature control section. Furthermore, a heat exchanger is provided between at least two of the plurality of loops to exchange heat between the heat medium of the two loops. Therefore, the temperature of the heat medium in one of the two loops is adjusted by the heat exchanger, and the temperature of the heat medium is adjusted in each of the two loops, and the desired temperature can be set in each loop by simply performing heat exchange with the heat exchanger as necessary. A heat medium can be efficiently supplied. Therefore, one heat exchanger can supply a heat medium at a desired temperature to each of the plurality of loops, so that heat production and heat recovery can be performed efficiently.

Further , the air conditioning system has a heat source loop connected to each of the plurality of air conditioner loops, and the plurality of air conditioner loops exchange heat with each other via the heat source loop. Therefore, it is possible to mutually exchange heat between the plurality of air conditioner loops, so that heat can be efficiently produced in each air conditioner loop.

The air conditioning system according to the present invention is provided in at least one of a plurality of loops for conveying a heat medium, and performs heating and/or cooling for the heat medium conveyed in the loops. the plurality of loops include a plurality of air conditioner loops to which air conditioners are connected, and a heat source loop connected to each of the plurality of air conditioner loops, and the plurality of loops include a plurality of air conditioner loops connected to each of the plural air conditioner loops; The loops exchange heat with each other via the heat source loop, and each of the heat source loop and the plurality of air conditioner loops has a temperature control section, and the temperature of the heat medium is controlled by the temperature control section of each of the plurality of air conditioner loops. It further includes a transfer loop that is controlled and transfers the heat of the heat medium in the heat source loop to each of the plurality of air conditioner loops, and a first heat exchange section is provided between the heat source loop and the transfer loop, and the transfer loop and A second heat exchange section is provided between each air conditioner loop, and the conveyance loop is a first heat exchange section through which the heat medium is conveyed from the first heat exchange section toward the second heat exchange section. The air conditioner loop is configured by a tube and a second tube through which the heat medium is conveyed from the second heat exchange section toward the first heat exchange section, and the air conditioner loop is arranged in parallel to the first loop and the first loop. The temperature control section is disposed between the first loop and the second loop . In this case, a conveying loop is further provided between each air conditioner loop and the heat source loop. The conveyance loop includes a first pipe in which the heat medium goes from the first heat exchange part to the second heat exchange part, and a second pipe in which the heat medium returns from the second heat exchange part to the first heat exchange part. It is composed of Therefore, since the transfer loop connecting the heat source loop and each air conditioner loop is composed of two pipes, the configuration of the air conditioning system can be simplified. That is, compared to a four-pipe air conditioning system, the space occupied by the piping can be reduced and the cost of piping can be reduced.

Further, the temperature control section may include a water heat source heat pump. In this case, heat can be efficiently produced by recovering heat using a water heat source heat pump.

In addition , by arranging a temperature control section between the first and second loops and having the temperature control section perform heat recovery operation, it is possible to improve the efficiency of heat production while also ensuring that each of the first and second loops is By receiving heat from the temperature control section, stable operation of the first loop and the second loop becomes possible.

In addition, the second air conditioner loop, the first air conditioner loop, and the heat source loop are arranged in this order from vertically above the building to vertically below, and the second air conditioner loop is installed in the upper part of the building. The first air conditioner loop may be provided in a lower part of the building. The heat source loop may include a cogeneration system. In this case, the heat source loop to which each of the plurality of air conditioner loops is connected has a cogeneration system, which contributes to energy saving inside the building.

According to the air conditioning system according to the present invention, heat production and heat recovery can be performed efficiently.

FIG. 1 is a diagram showing the configuration of an air conditioning system according to a first embodiment. It is a figure showing the composition of the air conditioning system concerning a 2nd embodiment. 3 is a diagram showing an example of an air conditioner loop of the air conditioning system of FIG. 2. FIG. 3 is a diagram illustrating an example of temperature control of a heat medium in the air conditioning system of FIG. 2. FIG. 3 is a diagram illustrating an example of temperature control of a heat medium in the air conditioning system of FIG. 2. FIG. 3 is a diagram illustrating an example of temperature control of a heat medium in the air conditioning system of FIG. 2. FIG. 4 is a diagram illustrating an example of temperature control of a heat medium in the air conditioner loop of FIG. 3. FIG. 4 is a diagram illustrating an example of temperature control of a heat medium in the air conditioner loop of FIG. 3. FIG. 4 is a diagram illustrating an example of temperature control of a heat medium in the air conditioner loop of FIG. 3. FIG. It is a figure showing the composition of the air conditioning system concerning a modification. It is a figure showing the composition of the air conditioning system concerning a modification. It is a figure showing the composition of the air conditioning system concerning a modification. It is a figure showing the composition of the air conditioning system concerning a modification. It is a figure showing the composition of the air conditioning system concerning a modification.

Hereinafter, embodiments of an air conditioning system according to the present invention will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted as appropriate. Furthermore, for ease of understanding, some parts of the drawings may be simplified or exaggerated, and the dimensional ratios and the like are not limited to those shown in the drawings.

In this specification, the term "thermal medium" refers to a fluid such as liquid or gas that is heated or cooled to supply heat at a desired temperature to the device. The term "loop" refers to a conduit through which a heat medium moves, and for example, refers to a conduit formed by reciprocating piping. The "temperature control section" indicates a portion that controls the temperature of the heat medium in the loop, and maintains the temperature of the heat medium within a certain range, for example. "Maintaining the temperature of the heat medium within a certain range" indicates that the temperature of the heat medium is controlled to be between a predetermined upper limit temperature and a predetermined lower limit temperature. "Heat accommodating" refers to supplying heat produced or generated within a loop to other loops, and includes exchanging heat between multiple loops. "Heat recovery" refers to the use of waste heat that would otherwise be thrown away to produce hot and cold water. For example, when using an air source heat pump, waste heat is released into the atmosphere while producing cold water, whereas when using a water source heat pump, while producing cold water, waste heat is recovered to produce hot water. Heat recovery can be achieved by performing this simultaneously.

(First embodiment)
FIG. 1 is a diagram showing the configuration of an air conditioning system 1 according to the first embodiment. As shown in FIG. 1, the air conditioning system 1 is provided inside a building S. The air conditioning system 1 includes, for example, a heat source loop 10 located in an underground machine room, a first air conditioner loop 20 connected to the heat source loop 10 via a heat exchanger 41, and a heat source loop 20 connected to the heat source loop 10 via a heat exchanger 42. and a second air conditioner loop 30 connected to the loop 10. The second air conditioner loop 30, the first air conditioner loop 20, and the heat source loop 10 are arranged, for example, in this order from vertically above the building S to vertically below.

For example, the load characteristics of the first air conditioner loop 20 and the load characteristics of the second air conditioner loop 30 are different from each other. As an example, the part of the building S where the first air conditioner loop 20 is installed functions as an office, and the part of the building S where the second air conditioner loop 30 is installed functions as a hotel. The building S is, for example, a high-rise building, and the height of the building S is 100 m or more and 900 m or less (approximately 400 m as an example). The second air conditioner loop 30 is installed in a high-rise part of the building S (for example, a site with a height of 200 m or more), and the first air conditioner loop 20 is installed in a low-rise part of the building S (for example, a site with a height of 200 m or less). part).

The heat source loop 10 includes, for example, a temperature control section 11, and the temperature control section 11 has a cold source 12 and a hot source 13. The cold source 12 and the hot source 13 are arranged in parallel, for example. In the heat source loop 10, when the temperature of the heat medium falls below a certain range, the heat source 13 functions to heat the heat medium, and when the temperature of the heat medium rises above the certain range, the cold source 12 functions to heat the medium. Cool the medium. As an example, when the heat medium in the heat source loop 10 becomes less than 15°C, the heat source 13 heats the heat medium to 15°C, and when the heat medium in the heat source loop 10 becomes higher than 15°C, the cold source 12 heats the heat medium to 15°C. Cool the heating medium to 15°C.

The heat of the heat medium heated or cooled by the heat source loop 10 is conveyed to each of the first air conditioner loop 20 and the second air conditioner loop 30. The first air conditioner loop 20 is connected to the heat source loop 10 via a heat exchanger 41. For example, the heat exchanger 41 is a normal heat exchanger that transfers heat from a high temperature location to a low temperature location. It is. The first air conditioner loop 20 includes an air conditioner 21a, an outside conditioner 21b, and a temperature control section 22 connected to each of the air conditioner 21a and the outside conditioner 21b. The temperature control unit 22 includes, for example, a water heat source heat pump connected to each of the air conditioner 21a and the outside conditioner 21b.

The heat medium flowing through the heat source loop 10 exchanges heat with the heat medium flowing through the first air conditioner loop 20 in the heat exchanger 41 . The heat medium of the first air conditioner loop 20 flows through the air conditioner 21a and the temperature control section 22, for example. The first air conditioner loop 20 also includes a first flow path 23 in which an air conditioner 21a and a temperature control unit 22 are provided, and a second flow path 24 in which a temperature control unit 22 and an outside conditioner 21b are provided. including. The temperature control unit 22 controls the temperature of either the first flow path 23 or the second flow path 24 .

Each of the air conditioner 21a and the outside conditioner 21b makes a heating request and a cooling request. The temperature control unit 22 controls the temperature of the heat medium flowing through the first channel 23 and the heat flowing through the second channel 24 in accordance with the heating request and cooling request of the air conditioner 21a and the external conditioner 21b. Control the temperature of the medium, either.

For example, when the air conditioner 21a functions as a cooling device and the outside conditioner 21b functions as a heater, the heat medium passing through the first flow path 23 is heated by the air conditioner 21a, and the heat medium passing through the first flow path 23 is heated by the outside conditioner 21b. The heat transfer medium passing through 24 is cooled. The temperature control unit 22 moves heat between the heat medium in the first flow path 23 heated by the air conditioner 21a and the heat medium in the second flow path 24 cooled by the outside conditioner 21b.

For example, the temperature control unit 22 cools the heat medium in the first flow path 23 that has been heated by the air conditioner 21a, or heats the heat medium in the second flow path 24 that has been cooled by the outside conditioner 21b. . In this way, the temperature control unit 22 controls the temperature of either the first flow path 23 or the second flow path 24. As an example, the temperature of the heat medium in the second flow path 24 may be controlled by the temperature controller 22, and the temperature of the heat medium in the first flow path 23 may be controlled by the heat exchanger 41.

As an example, when the temperature of the heat medium flowing into the heat exchanger 41 from the heat source loop 10 is 15°C, and the temperature of the heat medium flowing into the heat exchanger 41 from the temperature control unit 22 is 18°C, Due to the heat exchange in the exchanger 41, the heat medium in the heat source loop 10 is heated to 17°C, and the heat medium in the first air conditioner loop 20 is cooled to 16°C. The heat medium in the first air conditioner loop 20, which was set at 16° C., is heated to 20° C. by the air conditioner 21a. In the second flow path 24, as an example, a heat medium of 40°C or more and 45°C or less flows, and the temperature control unit 22 heats the 40°C heat medium to 45°C, and the external conditioner 21b heats the 40°C heat medium to 45°C. ℃ heating medium is cooled to 40 ℃.

The second air conditioner loop 30 is connected to the heat source loop 10 via a heat exchanger 42, for example. Heat exchanger 42 is a conventional heat exchanger that transfers heat from a location of higher temperature to a location of lower temperature. The second air conditioner loop 30 includes an air conditioner 31a, an outside conditioner 31b, and a temperature control section 32 connected to each of the air conditioner 31a and the outside conditioner 31b. The temperature control unit 32 includes, for example, a water heat source heat pump connected to each of the air conditioner 31a and the outside conditioner 31b.

The second air conditioner loop 30 includes a first flow path 33 in which an air conditioner 31a and a temperature control section 32 are provided, and a second flow path 34 in which a temperature control section 32 and an outside conditioner 31b are provided. include. Note that the respective configurations of the air conditioner 31a, the outside conditioner 31b, the temperature control unit 32, the first flow path 33, and the second flow path 34 are, for example, the above-mentioned air conditioner 21a, outside conditioner 21b, temperature control The structure is similar to that of the section 22, the first flow path 23, and the second flow path 24.

For example, when the temperature of the heat medium flowing into the heat exchanger 42 from the heat source loop 10 is 15°C, and the temperature of the heat medium flowing into the heat exchanger 42 from the temperature control unit 32 is 12°C, the heat exchange Due to the heat exchange in the heat exchanger 42, the heat medium in the heat source loop 10 is cooled to 13°C, and the heat medium in the second air conditioner loop 30 is heated to 14°C. The heat medium in the second air conditioner loop 30, which was set at 14° C., is heated to 16° C. by the air conditioner 31a. For example, the temperature control unit 32 cools the heat medium from the air conditioner 31a to 12°C, heats the heat medium from the outside conditioner 31b to 45°C, and adjusts the temperature of the heat medium in the second flow path 34. Maintain within a certain range. The temperature of the heat medium in the first flow path 33 is maintained within a certain range by the heat exchanger 42. As an example, the heat exchanger 42 maintains the temperature of the heat medium in the first flow path 33 at 12°C or more and 17°C or less, and the temperature control unit 32 maintains the temperature of the heat medium in the second flow path 34 at 40°C. Maintain above temperature and below 45°C.

In the above example, in the heat source loop 10, a 13° C. heat medium is supplied from the heat exchanger 42 to which the second air conditioner loop 30 is connected, and from the heat exchanger 42 to which the first air conditioner loop 20 is connected. A heating medium of 17° C. is supplied from 41. In each of the first air conditioner loop 20 and the second air conditioner loop 30, the temperature of the heat medium is controlled by the temperature control section 22 and the temperature control section 32, respectively.

The temperature of the heat medium in the heat source loop 10 may be maintained at, for example, 10°C to 15°C, and when the temperature of the heat medium reaches 15°C or higher, the cold source 12 is activated and the temperature of the heat medium is increased. The heat source 13 may be activated when the temperature becomes 10° C. or lower. However, as described above, when temperature control of the heat medium is performed in each of the first air conditioner loop 20 and the second air conditioner loop 30, the heat medium from the heat exchanger 41 and the heat medium from the heat exchanger 42 The heating medium is mixed with the heating medium. In the above example, the heat medium at 13°C and the heat medium at 17°C are mixed to produce a temperature of 15°C. In this case, even if the temperature control unit 11 (the cold source 12 and the hot source 13) of the heat source loop 10 does not operate, each of the first air conditioner loop 20 and the second air conditioner loop 30 can maintain the desired temperature. It can be realized. That is, the amount of operation of the temperature control section 11 of the heat source loop 10 can be reduced.

Next, the effects obtained from the air conditioning system 1 according to this embodiment will be explained. The air conditioning system 1 is provided with a heat source loop 10 that transports a heat medium and a first air conditioner loop 20, and each of the heat source loop 10 and the first air conditioner loop 20 has a temperature control system that controls the temperature of the heat medium. It includes sections 11 and 22. Therefore, temperature control of the heat medium of each of the heat source loop 10 and the first air conditioner loop 20 can be realized by the temperature control units 11 and 22.

Further, a heat exchanger 41 is provided between the heat source loop 10 and the first air conditioner loop 20 to exchange heat between the heat medium of the heat source loop 10 and the first air conditioner loop 20. Therefore, the temperature of the heat medium in each of the heat source loop 10 and the first air conditioner loop 20 is adjusted by the heat exchanger 41, and the heat exchanger 41 can adjust the temperature of the heat medium in each of the heat source loop 10 and the first air conditioner loop 20. A heat medium at a desired temperature can be efficiently supplied to each of the first air conditioner loops 20. Therefore, since one heat exchanger 41 can supply a heat medium at a desired temperature to each of the heat source loop 10 and the first air conditioner loop 20, heat production and heat recovery can be performed efficiently. .

Further, in the air conditioning system 1, the plurality of loops are connected to a first air conditioner loop 20, a second air conditioner loop 30, and each of the first air conditioner loop 20 and the second air conditioner loop 30. The first air conditioner loop 20 and the second air conditioner loop 30 exchange heat with each other via the heat source loop 10.

Therefore, the air conditioning system 1 has a heat source loop 10 connected to each of the first air conditioner loop 20 and the second air conditioner loop 30, and the first air conditioner loop 20 and the second air conditioner loop 30 are connected to each other. Heat exchange is performed with each other via the heat source loop 10. Therefore, it is possible to mutually exchange heat between the first air conditioner loop 20 and the second air conditioner loop 30, so that heat can be efficiently produced in each air conditioner loop 20, 30. .

Furthermore, in this embodiment, the temperature control units 22 and 32 include water heat source heat pumps. Therefore, heat can be efficiently produced by recovering heat using a water heat source heat pump.

(Second embodiment)
Next, an air conditioning system 51 according to a second embodiment will be described with reference to FIGS. 2 and 3. Note that, in the following description, to avoid duplication, descriptions of the same content as in the above-described embodiment will be omitted as appropriate. The air conditioning system 51 is provided inside a building S, which is a high-rise building, and includes, for example, a heat source loop 60 arranged in an underground machine room, a plurality of air conditioner loops 70, and the heat source loop 60 and each air conditioner loop. and a plurality of conveyance loops 80 interposed between the conveyance loops 70 and 70 . Note that in FIG. 2, the illustration of each air conditioner loop 70 is simplified.

The heat source loop 60 is arranged, for example, in an underground machine room, and the plurality of air conditioner loops 70 and the plurality of transport loops 80 are arranged in a machine room inside the building S. Each of the plurality of air conditioner loops 70 and the plurality of transport loops 80 are arranged, for example, along the vertical direction. A plurality of (for example, two) air conditioner loops 70 are connected to each conveyance loop 80. As an example, the transport loop 80 includes a first transport loop 81 located vertically below and a second transport loop 82 located vertically above the first transport loop 81.

The air conditioner loop 70 includes, for example, a first air conditioner loop 71, a second air conditioner loop 72, a third air conditioner loop 73, and a fourth air conditioner loop 74. The first air conditioner loop 71, the second air conditioner loop 72, the third air conditioner loop 73, and the fourth air conditioner loop 74 are arranged in this order from vertically downward to vertically upward. As an example, the first air conditioner loop 71 is a low-rise area from the ground to 100 m above the ground, the second air conditioner loop 72 is a medium-low-rise area from 100 m to 200 m above the ground, and the third air conditioner loop 73 is from 200 m to the ground. The fourth air conditioner loop 74 is installed in the middle and high-rise areas up to 300 m above the ground, and the fourth air conditioner loop 74 is installed in the high-rise areas up to 300 m above the ground and 400 m above the ground.

The first air conditioner loop 71 and the second air conditioner loop 72 are connected to the first conveyance loop 81. The third air conditioner loop 73 and the fourth air conditioner loop 74 are connected to the second conveyor loop 82 . For example, the load characteristics of the first air conditioner loop 71, the second air conditioner loop 72, the third air conditioner loop 73, and the fourth air conditioner loop 74 are different from each other.

The heat source loop 60 includes, for example, a temperature control section 61, and the temperature control section 61 may include a cogeneration system 65. The temperature control unit 61 includes, for example, a cold source 62 and a hot source 63. The configurations of the cold source 62 and the hot source 63 are, for example, similar to the configurations of the cold source 12 and the hot source 13 described above. The cold heat source 62 and the hot heat source 63 are connected to the cogeneration system 65 via a heat exchanger 64. Note that the heat source loop 60 includes a heat pump, a refrigerator (for example, a turbo refrigerator), or an exhaust heat injection type absorption refrigerator that generates cold and hot water from waste hot water generated simultaneously with power generation by the cogeneration system 65. Good too.

The heat source loop 60 and the first transport loop 81 are connected to each other via a heat exchange section 91 (first heat exchange section). In addition to the heat exchange section 91, the first conveyance loop 81 includes a heat exchange section 75 (second heat exchange section) to which each of the first air conditioner loop 71 and the second air conditioner loop 72 is connected, and The heat medium is conveyed to each of the heat exchange parts 94 to which the second conveyance loop 82 is connected. The heat medium passing through the first conveyance loop 81 is, for example, conveyed from the heat exchange section 91 through the first pipe 83 to each of the heat exchange sections 75 and 94, and is heat exchanged in each of the heat exchange sections 75 and 94. After that, it is returned to the heat exchange section 91 through the second pipe 84. In this way, the first transport loop 81 is a two-tube type including the first tube 83 and the second tube 84.

The first transport loop 81 and the second transport loop 82 are connected to each other via a heat exchange section 94. The second transport loop 82 transports the heat medium to each of the heat exchange section 94 and the heat exchange section 75 to which the third air conditioner loop 73 and the fourth air conditioner loop 74 are connected. The heat medium passing through the second conveyance loop 82 is conveyed from the heat exchange section 94 through the first tube 85 to each heat exchange section 75, and after being heat exchanged in each heat exchange section 75, the heat medium is transferred to the second tube. 86 and is returned to the heat exchange section 94. The second transport loop 82 is also a two-tube type including a first tube 85 and a second tube 86 .

The first air conditioner loop 71 and the second air conditioner loop 72 are connected to the first conveyance loop 81 via each heat exchange section 75 . The third air conditioner loop 73 and the fourth air conditioner loop 74 are connected to the second conveyance loop 82 via respective heat exchange sections 75 . For example, the configurations of the first air conditioner loop 71, the second air conditioner loop 72, the third air conditioner loop 73, and the fourth air conditioner loop 74 are the same. Therefore, below, each of the first air conditioner loop 71, the second air conditioner loop 72, the third air conditioner loop 73, and the fourth air conditioner loop 74 will be collectively described as the air conditioner loop 70.

As shown in FIG. 3, the air conditioner loop 70 includes the aforementioned heat exchange section 75, an air heat source heat pump 76, a water heat source heat pump 77, a heat medium flow adjustment section 78, and an air conditioner group 79. The air source heat pump 76 and the water source heat pump 77 function as a temperature control unit that controls the temperature of the heat medium of the air conditioner loop 70. For example, the water heat source heat pump 77 either heats or cools the heat medium, and the air heat source heat pump 76 has a function of assisting in heating or cooling the heat medium. As a specific example, the air source heat pump 76 supplements the temperature control insufficient by the heat source loop 60 and the water source heat pump 77.

The heat medium flow adjustment section 78 includes a plurality of pumps 78b and valves 78c. For example, a plurality of heat medium flow adjustment sections 78 are provided. The air conditioner group 79 includes, for example, an air conditioner 79b connected to one of the plurality of heat medium flow adjustment sections 78, and an outside conditioner 79c connected to the other of the plurality of heat medium flow control sections 78. .

The air conditioner loop 70 includes a first loop 70A that passes through the heat exchange section 75 and a second loop 70B that does not pass through the heat exchange section 75. In the first loop 70A, a first header H1 including an air heat source heat pump 76 and a water heat source heat pump 77, one heat medium flow adjustment section 78 of a plurality of heat medium flow adjustment sections 78, an air conditioner group 79, and a heat exchanger A heat medium flows through the portion 75 . In the heat medium distribution path, the heat exchange part 75, the air heat source heat pump 76, and the water heat source heat pump 77 are arranged in series, and the heat exchange part 75 is located upstream of the air heat source heat pump 76 and the water heat source heat pump 77. installed on the side.

In the second loop 70B, a second header H2 including an air heat source heat pump 76 and a water heat source heat pump 77 and arranged in parallel to the first header H1, and a heat medium flow adjustment section for the other of the plurality of heat medium flow adjustment sections 78 are used. A heat medium flows through the section 78 and the air conditioner group 79. In each of the first header H1 and the second header H2, the air source heat pump 76 and the water source heat pump 77 are interposed between the first loop 70A and the second loop 70B. That is, the air source heat pump 76 and the water source heat pump 77 are connected to both the first loop 70A and the second loop 70B.

An example of movement of the heat medium and temperature control in the air conditioning system 51 including the heat source loop 60, the air conditioner loop 70, and the transport loop 80 configured as described above will be described. First, when the air conditioner loop 70 requests cooling during the summer season (for example, from May to October), as shown in FIG. The exchange causes a heat medium at 6° C. to flow through the first tube 83 of the first conveyance loop 81 . Then, the heat medium at 7° C. is caused to flow through the first tube 85 of the second conveyance loop 82 by heat exchange in the heat exchange section 94 . In this way, when a heat medium of 6° C. is circulated in the first conveyance loop 81 and a heat medium of 7°C is circulated in the second conveyance loop 82, for example, each heat medium is A heat medium at 8° C. is passed through the air conditioner loop 70.

When the cooling request of the air conditioner loop 70 is larger than the heating request in the winter season (for example, from November to April), that is, when the heat exchange section 75 makes a cooling request, the heat source loop 60 A heat medium of 15° C. is passed through the first pipe 83 of the first transport loop 81 through heat exchange in the heat exchange section 91 . Then, the heat medium at 17° C. is caused to flow through the first tube 85 of the second conveyance loop 82 by heat exchange in the heat exchange section 94 . Then, a heat medium of 15 to 17.5° C. is circulated through each air conditioner loop 70 by heat exchange in each heat exchange section 75.

When the heating request of the air conditioner loop 70 is larger than the cooling request in the winter season (for example, from November to April), that is, when the heat exchange section 75 makes a heating request, the heat source loop 60 as shown in FIG. A heat medium of 18° C. is passed through the heat exchanger 91, and a heat medium of 17°C is passed through the first pipe 83 of the first conveyance loop 81 by heat exchange in the heat exchanger 91. Furthermore, the heat medium at 16° C. is caused to flow through the first tube 85 of the second conveyance loop 82 by heat exchange in the heat exchange section 94 . Furthermore, a heat medium of 15 to 17.5° C. is caused to flow through each air conditioner loop 70 by heat exchange in each heat exchange section 75.

For example, as shown in FIG. 7, the temperature of the heat medium in the air conditioner loop 70 when cooling is requested in the summer is as follows: 6° C. heat medium is supplied to the heat exchange section 75 of the air conditioner loop 70; A heat medium of 8° C. is supplied from the exchange section 75 to the air heat source heat pump 76 . This 8° C. heat medium passes through the heat medium flow adjustment section 78 and reaches the air conditioner group 79, where it is used by the air conditioner 79b and heated to 13° C., for example. The heat medium heated to 13° C. is returned to the heat exchange section 75. Note that the water heat source heat pump 77 does not operate, for example, when cooling is requested.

Further, when the heat exchange section 75 issues a cooling request, a heat medium of 16° C. to 17° C. is supplied to the heat exchange section 75, as shown in FIG. 8, for example. Then, a heat medium of 17.5° C. is supplied to each of the air heat source heat pump 76 and the water heat source heat pump 77, and a heat medium of 12.5° C. is supplied from the water heat source heat pump 77. A 15° C. heat medium is supplied to the air conditioner 79b via the heat medium flow adjustment unit 78, and a 45° C. heat medium is supplied to the outside conditioner 79c. When the heat medium is used for cooling purposes by the air conditioner 79b, the heat medium is heated by the air conditioner 79b, and the heated heat medium, for example, heated to 20° C. is returned to the heat exchange section 75. Further, when the heat medium is used for heating purposes by the outside conditioner 79c, the heat medium is cooled by the outside conditioner 79c, and the cooled heat medium is returned to the water heat source heat pump 77, for example.

In addition, as another example from FIG. 8, when the heat exchange section 75 makes a heating request, for example, as shown in FIG. Accordingly, a 10° C. heat medium is supplied to the water heat source heat pump 77, and a 5° C. heat medium is discharged from the water heat source heat pump 77. Then, the heat medium at 5° C. is supplied to the air conditioner 79b via the heat medium flow adjustment unit 78, and the heat medium at 45° C. is supplied to the outside conditioner 79c. When the heat medium is used for cooling purposes by the air conditioner 79b, the heat medium is heated by the air conditioner 79b, and the heat medium at, for example, 10° C. is returned from the air conditioner 79b to the heat exchange section 75. Further, when the heat medium is used for heating purposes by the outside conditioner 79c, the heat medium is cooled by the outside conditioner 79c, and the heat medium at, for example, 40° C. is returned from the outside conditioner 79c to the water heat source heat pump 77.

As described above, for example, as shown in FIGS. 2 and 3, the air conditioning system 51 is provided with a heat source loop 60 and an air conditioner loop 70 that transport a heat medium, and each of the heat source loop 60 and the air conditioner loop 70 is A temperature control section (for example, a temperature control section 61, an air heat source heat pump 76, and a water heat source heat pump 77) that performs either heating or cooling the medium is provided. Therefore, since the heat medium is heated or cooled between the heat source loop 60 and the air conditioner loop 70, the same effects as in the first embodiment can be obtained.

In addition, in the air conditioning system 51, the heat of the heat medium of the heat source loop 60 is transferred to each of the first air conditioner loop 71, the second air conditioner loop 72, the third air conditioner loop 73, and the fourth air conditioner loop 74. A transport loop 80 (a first transport loop 81 and a second transport loop 82) for transport is provided. A heat exchange section 91 is provided between the heat source loop 60 and the first conveyance loop 81, and a heat exchange section 91 is provided between the first conveyance loop 81 and each of the first air conditioner loop 71 and the second air conditioner loop 72. A heat exchange section 75 is provided. The first transport loop 81 is configured by a first pipe 83 going from the heat exchange section 91 to the heat exchange section 75 and a second pipe 84 returning from the heat exchange section 75 to the heat exchange section 91. Therefore, since the first conveying loop 81 connecting the heat source loop 60 and each of the first air conditioner loop 71 and the second air conditioner loop 72 is composed of two pipes, the configuration of the air conditioning system 51 is further simplified. It can be done. Furthermore, compared to a four-pipe air conditioning system, the space occupied by the piping can be reduced and the cost of piping can be reduced. The same applies to the second transport loop 82.

For example, the air conditioner loops 73, 74 and the transport loop 82 are provided in the upper part of the building S, and the air conditioner loops 71, 72 and the transport loop 81 are provided in the lower part of the building S. The loop 82 and the transport loop 81 are connected via a heat exchange section 94. Therefore, by dividing the building S, which is a high-rise building, into upper and lower parts, and by providing transport loops 81 and 82 in each area of the divided building S, the unit of transport of the heat medium can be divided into the upper and lower parts of the building S. As a result, the water pressure applied to piping and equipment can be reduced, and the heat from the heat medium in the lower layer can be transferred to the heat medium in the higher layer. For example, heat from the cogeneration system 65 placed in the underground heat source loop 60 can be transferred to the upper floors of the building S.

By the way, for hot water production in the heat source loop 60, it is rational to use the waste hot water supply from the cogeneration system 65 from the viewpoint of energy saving. 60 may not always be able to supply the amount of heat required by the air conditioner loop 70. Therefore, when the heat exchange section 75 makes a heating request, the heat source loop 60 may not be able to satisfy the heating request. In this case, the air heat source heat pump 76 auxiliarily heats the heat medium of the air conditioner loop 70, so that the heating amount of the water heat source heat pump 77 is reduced, and the amount of heating heat required for the heat source loop 60 can be reduced. , stable operation becomes possible. That is, for example, by controlling the heating amount of the air source heat pump 76 while monitoring the amount of waste hot water supplied from the cogeneration system 65, more energy-saving and stable operation can be performed.

Each embodiment of the air conditioning system according to the present invention has been described above. However, the present invention is not limited to the embodiments described above, and may be modified or applied to other things without changing the gist of each claim. That is, the present invention can be modified in various ways without changing the gist of each claim. For example, the configuration and arrangement of each part of the air conditioning system can be changed as appropriate. Below, various modifications of the air conditioner loop of the air conditioning system will be described. In addition, since at least a part of the air conditioning system according to the modification has the same configuration as at least a part of the air conditioning system described above, the same reference numerals will be used to describe the configurations that overlap with the configuration of the air conditioning system described above. Omit as appropriate.

For example, as shown in FIG. 10, the air conditioner loop 110 according to the modification includes a heat exchange section 75, a water heat source heat pump 77 functioning as a temperature control section, two heat medium flow adjustment sections 78, and an air conditioner. group 79. Air conditioner loop 110 differs from air conditioner loop 70 in FIG. 3 in that it does not include air source heat pump 76. Air conditioner loop 110 differs from air conditioner loop 70 in FIG. In the flow path of the heat medium, the heat exchange section 75 and the water heat source heat pump 77 are arranged in series, and the heat exchange section 75 is provided upstream of the water heat source heat pump 77. Since this air conditioner loop 110 includes one heat exchange section 75 and does not include an air source heat pump 76, it contributes to reducing equipment costs and piping costs. Further, since the number of heat exchange parts 75 is one, the supply flow rate of the heat medium to the air conditioner loop 110 can be reduced, so that heat can be efficiently produced with a small supply flow rate.

As shown in FIG. 11, the air conditioner loop 120 according to the modification includes a heat exchange section 115, a water heat source heat pump 117 functioning as a temperature control section, two heat medium flow adjustment sections 78, and an air conditioner group 79. Equipped with. In the flow path of the heat medium, the heat exchange section 115 and the water heat source heat pump 117 are arranged in series, and the heat exchange section 115 is provided downstream of the water heat source heat pump 77.

The air conditioner loop 120 includes a first loop 120A that passes through the heat exchange section 115 and a second loop 120B that does not pass through the heat exchange section 115. In the first loop 120A, the heat medium flows through the first header H11 including the water heat source heat pump 117, the heat exchange section 115, one heat medium distribution adjustment section 78, and the air conditioner group 79. In the second loop 120B, the heat medium flows through the second header H12 that includes the water heat source heat pump 117 and is arranged in parallel to the first header H11, the other heat medium flow adjustment section 78, and the air conditioner group 79. Water heat source heat pump 117 is interposed between first loop 120A and second loop 120B. In other words, the water heat source heat pump 117 is connected to both the first loop 120A and the second loop 120B.

In this air conditioner loop 120, since the number of heat exchange parts 115 is one, it contributes to reduction of equipment cost and piping cost, and the supply flow rate of the heat medium to the air conditioner loop 120 can be reduced. Furthermore, in the air conditioner loop 120, the heat exchange section 115 is provided downstream of the water heat source heat pump 117 in the heat medium flow path, so that the temperature of the heat medium supplied to the air conditioner loop 120 can be lowered. Therefore, the effect of making it easier to utilize low-temperature unused energy (for example, low-temperature waste heat, well water heat, river water heat, etc.) can also be obtained.

As shown in FIG. 12, the air conditioner loop 130 according to the modification includes a heat exchange section 135, a water heat source heat pump 137 functioning as a temperature control section, two heat medium flow adjustment sections 78, and an air conditioner group 79. Equipped with. In the heat medium distribution path, the heat exchange section 135 and the water heat source heat pump 77 are arranged in parallel, for example, the heat exchange section 135 and the water heat source heat pump 137 are arranged between the pair of first headers H21. .

The air conditioner loop 130 includes a first loop 130A that passes through the heat exchange section 135 and a second loop 130B that does not pass through the heat exchange section 135. In the first loop 130A, the heat medium flows through the first header H21 including the heat exchange section 135 and the water heat source heat pump 137, one heat medium flow adjustment section 78, and the air conditioner group 79. In the second loop 130B, the heat medium flows through the second header H22 that includes the water heat source heat pump 137 and is arranged in parallel to the first header H21, the other heat medium flow adjustment section 78, and the air conditioner group 79. Water heat source heat pump 137 is interposed between first loop 130A and second loop 130B.

In the air conditioner loop 130, the temperature of the heat medium supplied to the air conditioner loop 130 can be lowered, similar to the air conditioner loop 120 described above. Furthermore, in the air conditioner loop 130, the heat exchange section 135 and the water heat source heat pump 137 are arranged in the first header H21, so that the head of the pump 78b of the heat medium flow adjustment section 78 can be made small. Conveying power can be suppressed.

As shown in FIG. 13, the air conditioner loop 140 according to the modification includes a heat exchange section 75, a water heat source heat pump 147 functioning as a temperature control section, two heat medium flow adjustment sections 78, and an air conditioner group 79. Equipped with. In the heat medium distribution path, the heat exchange section 75 and the water heat source heat pump 147 are arranged independently of each other, and the water heat source heat pump 147 is provided between the pair of headers H.

The air conditioner loop 140 includes a first loop 140A that passes through the heat exchange section 75 and a second loop 140B that does not pass through the heat exchange section 75. For example, the first loop 140A is a cold water system, and the second loop 140B is a hot water system. In the first loop 140A, the heat medium flows through the heat exchange section 75, one heat medium flow adjustment section 78, and the air conditioner group 79. In the second loop 140B, the heat medium flows through the header H including the water heat source heat pump 147, the other heat medium flow adjustment section 78, and the air conditioner group 79. In addition, in the air conditioner loop 140, not only the heat exchange section 75 but also the water heat source heat pump 147 is connected to the above-described transport loop 80. In the air conditioner loop 140, since the cold water system and the hot water system are separated, the operation and control of the air conditioner loop 140 can be simplified.

FIG. 14 shows an air conditioning system 151 according to a modification. As shown in FIG. 14, the air conditioning system 151 includes two loops 152 that circulate a heat medium, and a heat exchanger 153 that exchanges heat between the two loops 152, and each loop 152 has a temperature control section. 154 and a plurality of air conditioners 155. The temperature control unit 154 includes, for example, a cold source or a hot source, and the air conditioner 155 may include a water source heat pump. In the case of this air conditioning system 151, since the two loops 152 mutually exchange heat, the temperature of the heat medium passing through each loop 152 can be maintained within a certain range while maintaining a simple configuration.

In addition, in the above-mentioned first embodiment, the heat source loop 10 including the temperature control section 11 including the cold source 12 and the hot source 13 has been described. However, the type, configuration, number, and arrangement of the temperature control section are not limited to those including a cold source and a hot source, and can be changed as appropriate. Further, in the above embodiment, as shown in FIG. 3, an example was described in which the air conditioner loop 70 includes an air heat source heat pump 76 and a water heat source heat pump 77 as temperature control units. However, for example, only the air heat source heat pump 76 may be disposed as a temperature control section between the first loop 70A and the second loop 70B, and this air heat source heat pump 76 cooperates with the heat source loop 60 to control the temperature of the heat medium. Control may also be performed.

Furthermore, in the embodiment described above, the first air conditioner loop 20 including the air conditioner 21a, the outside conditioner 21b, and the temperature control unit 22 connected to each of the air conditioner 21a and the outside conditioner 21b was described. However, the configuration of the air conditioner loop in which the air conditioner is provided can also be changed as appropriate. Further, the configurations of the heat source loop and the transport loop can also be changed as appropriate. Furthermore, in the embodiment described above, the air conditioning system 1 provided in the building S, which is a high-rise building, has been described. However, the air conditioning system according to the present invention is also applicable to buildings other than high-rise buildings.

DESCRIPTION OF SYMBOLS 1...Air conditioning system, 10...Heat source loop, 11...Temperature control unit, 12...Cold heat source, 13...Heat source, 20...First air conditioner loop, 21a...Air conditioner, 21b...Outside conditioner, 22...Temperature control Part, 23...First flow path, 24...Second flow path, 30...Second air conditioner loop, 31a...Air conditioner, 31b...Outside conditioner, 32...Temperature control unit, 33...First flow channel, 34... second flow path, 41, 42... heat exchanger, 51... air conditioning system, 60... heat source loop, 61... temperature control section, 62... cold heat source, 63... hot heat source, 64... heat exchanger, 65... Cogeneration system, 70, 110, 120, 130, 140... Air conditioner loop, 70A, 120A, 130A, 140A... First loop, 70B, 120B, 130B, 140B... Second loop, 71... First air conditioning machine loop, 72... second air conditioner loop, 73... third air conditioner loop, 74... fourth air conditioner loop, 75... heat exchange section (second heat exchange section), 76... air heat source heat pump, 77...Water heat source heat pump, 78...Heat medium flow adjustment section, 78b...Pump, 78c...Valve, 79...Air conditioner group, 79b...Air conditioner, 79c...Outside conditioner, 80...Transportation loop, 81...First transportation Loop, 82... Second transport loop, 83, 85... First pipe, 84, 86... Second pipe, 91... Heat exchange section (first heat exchange section), 94... Heat exchange section, 151... Air conditioning system, 152...Loop, 153...Heat exchanger, 154...Temperature controller, 155...Air conditioner, H...Header, H1, H11, H21...First header, H12, H22...Second header, S...Building.

Claims (5)

multiple loops for conveying heat medium;
a temperature control unit that is provided in at least one of the plurality of loops and performs at least one of heating and cooling the heat medium conveyed in the loop;
a plurality of heat exchangers that are provided between at least any two of the plurality of loops and perform heat exchange between the heat medium of the two loops;
Equipped with
The plurality of loops include a plurality of air conditioner loops to which air conditioners are connected, and a heat source loop connected to each of the plurality of air conditioner loops,
The plurality of air conditioner loops exchange heat with each other via the heat source loop,
The plurality of heat exchangers include a first heat exchanger and a second heat exchanger,
The plurality of air conditioner loops are a first air conditioner loop connected to the heat source loop via the first heat exchanger, and a first air conditioner loop connected to the heat source loop via the second heat exchanger. Contains a second air conditioner loop,
Each of the heat source loop, the first air conditioner loop, and the second air conditioner loop has the temperature control section,
The temperature of the heat medium is controlled by each of the temperature control unit of the first air conditioner loop and the temperature control unit of the second air conditioner loop,
Each of the first air conditioner loop and the second air conditioner loop includes an air conditioner, an outside conditioner, and the temperature control section connected to each of the air conditioner and the outside conditioner,
The temperature control section of each of the first air conditioner loop and the second air conditioner loop includes a water heat source heat pump connected to each of the air conditioner and the outside conditioner,
Each of the first air conditioner loop and the second air conditioner loop includes a first flow path in which the air conditioner and the temperature control section are provided, and a first flow path in which the temperature control section and the outside conditioner are provided. and a second flow path, wherein the temperature control section controls the temperature of either the first flow path or the second flow path.
Air conditioning system. multiple loops for conveying heat medium;
a temperature control unit that is provided in at least one of the plurality of loops and performs at least one of heating and cooling the heat medium conveyed in the loop;
Equipped with
The plurality of loops include a plurality of air conditioner loops to which air conditioners are connected, and a heat source loop connected to each of the plurality of air conditioner loops ,
Each of the heat source loop and the plurality of air conditioner loops has the temperature control section,
The temperature of the heat medium is controlled by the temperature control unit of each of the plurality of air conditioner loops,
further comprising a transport loop that transports the heat of the heat medium of the heat source loop to each of the plurality of air conditioner loops,
A first heat exchange section is provided between the heat source loop and the transport loop, and a second heat exchange section is provided between the transport loop and each air conditioner loop,
The conveyance loop includes a first tube through which a heat medium is conveyed from the first heat exchange section to the second heat exchange section, and from the second heat exchange section to the first heat exchange section. constituted by a second tube through which the heat medium is conveyed towards,
The air conditioner loop includes a first loop and a second loop arranged in parallel to the first loop,
the temperature control section is arranged between the first loop and the second loop;
Air conditioning system. The temperature control unit includes a water heat source heat pump.
The air conditioning system according to claim 2. The second air conditioner loop, the first air conditioner loop, and the heat source loop are arranged in this order from vertically above the building to vertically below the building,
The second air conditioner loop is provided in a high-rise portion of the building, and the first air conditioner loop is provided in a low-rise portion of the building.
The air conditioning system according to claim 1. The heat source loop has a cogeneration system.
The air conditioning system according to any one of claims 1 to 4.

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