JP6653938B2 - Water heater / cooler, air conditioner and air conditioner system - Google Patents

Description

  The present invention relates to a water heater and a water heater capable of stably supplying water at a predetermined temperature, and an air conditioner and an air conditioning system using the same.

  Among buildings such as high-rise buildings, air conditioning equipment of facilities where rooms are separated individually, such as hotels and hospitals, performs heat exchange with cold water generated from chillers etc. for cooling operation Is performed, and heat exchange is performed by warm water passed from the boiler device to perform a heating operation. These heat exchanges are performed by fan coil units provided in each room.

  In such a fan coil unit, two pipes, a water supply pipe and a return water pipe, are provided (two-pipe fan coil unit). However, the heat source water passing through the water supply pipe is either cold water or hot water. Whether or not to do so must be determined for the entire building, and in general, operation is performed such that cold water (only for cooling operation) at a predetermined time and hot water (only for heating operation) at other times. Therefore, in the conventional air-conditioning equipment, only one of the cooling operation and the heating operation can be selected in the entire building, and the cooling operation or the heating operation cannot be selected in each room. In such a situation, for example, in the case of a building where an unspecified number of people stay in each room like a hotel, or in a building where patients with various symptoms are hospitalized like a hospital, in each room, The desired room temperature varied, and the dissatisfaction was great.

  In order to solve such a problem, each fan coil unit is provided with four pipes including a water pipe and a return pipe for cold water generated from a chiller and the like, and a water pipe and a return pipe for hot water passed from a boiler device. Are provided in the four-tube fan coil unit. However, when installing this fan coil unit in an existing building, it is necessary to add piping equipment to each room, and very large-scale renovation work is required, so the equipment cost is large. there were. Further, since the chiller and the boiler device need to be constantly operated, the maintenance cost is large.

  Therefore, an air conditioning unit in which an air heat exchanger of a water heat source heat pump is installed in series with a fan coil is known (for example, see Patent Documents 1 to 3). This air conditioning unit realizes individual air conditioning by switching circuits even if it is a two-tube fan coil unit.

JP 05-118595 A JP 05-126350 A JP 2005-134088 A

  However, the air conditioning units described in Patent Documents 1 to 3 operate so as to supplement the capacity of the fan coil unit, so that both the fan coil and the heat pump operate simultaneously, and the operation frequency of the heat pump increases. Met.

  Accordingly, the present invention provides an individual air conditioner that can be connected to a two-tube fan coil unit, can switch to cooling operation or heating operation at low cost by reducing the operation frequency of the heat pump, and can perform fine temperature control. In order to realize, an object of the present invention is to provide a chiller / heater used in such an air conditioning system and capable of stably supplying water at a predetermined temperature, and an air conditioner and an air conditioning system using the same. I do.

In order to solve the above problem, the invention according to claim 1 performs temperature control on water passed through a feed pipe inlet using a heat medium, flows the water to a feed pipe outlet, and supplies water having a predetermined temperature. A water heater and a water heater that can supply the water stably and return the used water from the return pipe inlet to the return pipe outlet, and a compressor that compresses the heat medium to increase the temperature to perform the temperature control, A four-way valve that switches the flow path of the heat medium by performing an operation of increasing the temperature of the water or an operation of decreasing the temperature of the water, and an expansion valve that decompresses the heat medium. And a first water heating medium heat exchanger that is disposed on the feed pipe inlet side and performs heat exchange between water passed from the feed pipe inlet and the heat medium flowing by the expansion valve. Disposed downstream of the first hydrothermal medium heat exchanger in the water flow path. A water / water heat exchanger for exchanging heat between the water passed through the feed pipe inlet and the used water, and a water / water heat exchanger downstream of the water / water heat exchanger in the flow path of the water. A second water heat medium heat exchanger that performs heat exchange between the water after the heat exchange is performed in the water-water heat exchanger and the heat medium flowing by the expansion valve. Wherein the compressor is operated as required for the temperature control, and the heat generated by the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water water heat exchanger is provided. While the exchange is performed, a first three-way valve that switches between passing the water passed from the feed pipe inlet to the first water heat medium heat exchanger or passing the water to the water water heat exchanger, Switching between passing the water passed from the feed pipe inlet to the feed pipe outlet or passing the water to the return pipe outlet A first three-way valve, wherein the first three-way valve is configured to exchange heat with the first water heat medium heat exchanger and the second water heat medium heat exchanger when the water is not supplied. When the water is supplied without performing the above, or when the water is supplied by performing heat exchange with the first water heat medium heat exchanger and the second water heat medium heat exchanger, Through the first water heat medium heat exchanger, the first water heat medium heat exchanger, the second water heat medium heat exchanger, and heat exchange by the water water heat exchanger to perform the When supplying water, the water is passed through the water / water heat exchanger, and when not supplying the water, the second three-way valve passes the water through the return pipe outlet when not supplying the water. When the water is supplied without performing heat exchange by the water heat medium heat exchanger and the second water heat medium heat exchanger, the first water heat A case in which the water is supplied by performing heat exchange with the medium heat exchanger and the second water heat medium heat exchanger, or in the case where the first water heat medium heat exchanger and the second water heat medium heat exchange are performed. In the case where the water is supplied by performing heat exchange by a vessel and the water-water heat exchanger, the water is passed to the outlet of the sending pipe .

  According to the present invention, the compressor is operated as needed for temperature control, and water passed through the feed pipe inlet is subjected to heat exchange by the first water heat medium heat exchanger and the water water heat exchanger, The water after the heat exchange is heat-exchanged by the second water heat medium heat exchanger.

The invention according to claim 2 is the chiller / heater according to claim 1, wherein the compressor, the four-way valve, the expansion valve, the first water heat medium heat exchanger, the water water heat exchanger, A control device for controlling the second water heat medium heat exchanger, the first three-way valve, and the second three-way valve is provided.

According to a third aspect of the present invention, in the water cooler / heater according to any one of the first to second aspects, the first three-way valve is closed when the water is not supplied. It is characterized by.

Invention according to claim 4, in hot and cold water dispenser according to any one of claims 1 or 3, when lowering the temperature of the water passed from the feed pipe inlet, the first hydrothermal medium The temperature of the water passed from the inlet of the feed pipe by the heat exchanger is reduced by heat exchange with the heat medium, and the temperature of the used water is reduced by the second water heat medium heat exchanger to the heat medium. When the temperature of the water passed from the inlet of the feed pipe is further increased by heat exchange with the water, and the temperature of the water passed from the inlet of the feed pipe by the water / water heat exchanger is further reduced, the temperature of the water after use is reduced. And the temperature of water passed from the inlet of the feed pipe by the first water heat medium heat exchanger is lowered by heat exchange with the heat medium, and the water water heat exchange The temperature of the water after use by the vessel The temperature is increased by heat exchange with water passed through the mouth, and the temperature of the used water is increased by heat exchange with the heat medium by the second water heat medium heat exchanger. When raising the temperature of the water passed through the inlet, the temperature of the water passed through the feed pipe inlet by the water / water heat exchanger is raised by heat exchange with the used water, and the first water is used. The temperature of the water passed from the inlet of the sending pipe by the water heat medium heat exchanger is increased by heat exchange with the heat medium, and the temperature of the used water by the water / water heat exchanger is changed to the sending pipe. The temperature is reduced by heat exchange with water passed through the inlet, and the temperature of the used water is reduced by the second water heat medium heat exchanger by heat exchange with the heat medium. And

According to the fifth aspect of the present invention, it is possible to control the temperature of the water passed from the inlet of the feed pipe by using a heat medium and to flow the water to the outlet of the feed pipe to stably supply water at a predetermined temperature. A water cooler / heater for returning the water afterwards from a return pipe inlet to a return pipe outlet, wherein the compressor for compressing the heat medium and increasing the temperature to perform the temperature control includes: Performing the operation of increasing the temperature of the water, or performing the operation of decreasing the temperature, a four-way valve that switches the flow path of the heat medium, an expansion valve that decompresses the heat medium, and the feed pipe inlet side A first water heat medium heat exchanger that is disposed and performs heat exchange between water passed through the feed pipe inlet and the heat medium that is flowed by the expansion valve; and It is disposed downstream of the first hydrothermal medium heat exchanger and passes through the feed pipe inlet. A water-water heat exchanger that performs heat exchange between the water and the used water, and a water-water heat exchanger that is disposed downstream of the water-water heat exchanger in the water flow path. A second water heat medium heat exchanger that performs heat exchange between the water after the heat exchange is performed in the heat exchanger and the heat medium that is flowed by the expansion valve; If necessary, the compressor is operated to perform heat exchange by the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water water heat exchanger. Closing the water passed from the pipe inlet, or passing a part of the flow rate of the water passed from the feed pipe inlet to the return pipe outlet, and reducing the flow rate of the water not passing to the return pipe outlet. A first three-way valve capable of freely controlling the flow rate by switching between passing through a water / water heat exchanger, A second three-way valve that switches between passing the passed water through the first three-way valve or passing through the first water heat medium heat exchanger, wherein the first three-way valve comprises: When the supply of the water is not performed, the water is passed through the return pipe outlet, and the water is discharged without performing the heat exchange by the first water heat medium heat exchanger and the second water heat medium heat exchanger. When performing the supply, the water is closed, and the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water-water heat exchanger perform heat exchange to supply the water. When performing, the water is passed through the water-water heat exchanger, or a part of the flow rate of the water is passed through the return pipe outlet, the flow rate of the water is not passed through the return pipe outlet, the water-water heat exchanger Through the second three-way valve, heat exchange between the first water heat transfer medium heat exchanger and the second water heat transfer medium heat exchanger. When supplying the water without performing, the water is passed through the first hydrothermal medium heat exchanger, when not supplying the water, or when the first hydrothermal medium heat exchanger, the first In the case where the water is supplied by performing heat exchange using the water heat medium heat exchanger and the water-water heat exchanger, the water is passed through the first three-way valve.

According to a sixth aspect of the present invention, in the water cooler / heater according to the fifth aspect, when the temperature of the water passed through the feed pipe inlet is lowered, the water is passed through the feed pipe inlet by the water / water heat exchanger. The temperature of the discharged water is reduced by the heat exchange with the water after use, and the temperature of the water passed from the inlet of the feed pipe by the first water heat medium heat exchanger is changed by the heat exchange with the heat medium. And the temperature of the used water is raised by the water-water heat exchanger by heat exchange with the water passed through the feed pipe inlet, and the temperature of the water is increased by the second water heat medium heat exchanger. When the temperature of the used water is raised by heat exchange with the heat medium and the temperature of the water passed through the feed pipe inlet is raised, the temperature of the water is passed through the feed pipe inlet by the water / water heat exchanger. The temperature of the heated water is the heat with the water after use And the temperature of the water passed through the feed pipe inlet by the first water heat medium heat exchanger is raised by heat exchange with the heat medium, and is used by the water water heat exchanger. After the temperature of the water is reduced by heat exchange with the water passed from the inlet of the feed pipe, the temperature of the water after use by the second water heat medium heat exchanger is reduced by the heat exchange with the heat medium. Characterized by being reduced by heat exchange.

The invention according to claim 7 is the chiller / heater according to claim 6 , wherein the compressor, the four-way valve, the expansion valve, the first heat medium heat exchanger, and the water heat exchanger. , A control device for controlling the second hydrothermal medium heat exchanger, the first three-way valve, and the second three-way valve.

The invention according to claim 8, in water dispenser according to any one of claims 1 to 6, disposed on the downstream side of the first water heating medium heat exchanger in the flow path of the water And an auxiliary water heat medium heat exchanger that performs heat exchange between the used water and the heat medium flowing through the expansion valve, wherein the water water heat exchanger includes the auxiliary water heat medium heat exchange. Heat exchange is performed between the water after the heat exchange in the vessel and the heat medium flowing through the expansion valve.

According to a ninth aspect of the present invention, in the chiller / heater according to the eighth aspect, when the temperature of the water passed through the feed pipe inlet is reduced, the water is passed through the feed pipe inlet by the water / water heat exchanger. The temperature of the discharged water is reduced by the heat exchange with the water after use, and the temperature of the water passed from the inlet of the feed pipe by the first water heat medium heat exchanger is changed by the heat exchange with the heat medium. The temperature of the water after use by the auxiliary water heat medium heat exchanger is reduced by heat exchange with the heat medium, and the temperature of the water after use by the water water heat exchanger is While being raised by heat exchange with the water passed from the inlet of the feed pipe, the temperature of the water after use by the second water heat medium heat exchanger is raised by heat exchange with the heat medium, Raise the temperature of the water passed through the inlet In this case, the temperature of the water passed from the inlet of the feed pipe by the water / water heat exchanger is increased by heat exchange with the used water, and the water is transferred by the first water / heat medium heat exchanger. The temperature of the water passed from the pipe inlet is increased by heat exchange with the heat medium, and the temperature of the used water is increased by the heat exchange with the heat medium by the auxiliary water heat medium heat exchanger. The temperature of the water after use by the water-water heat exchanger is reduced by heat exchange with the water passed through the feed pipe inlet, and the temperature of the water after use by the second water heat medium heat exchanger is reduced. The temperature of the water is reduced by heat exchange with the heat medium.

The invention according to claim 10 is the chiller / heater according to any one of claims 8 and 9 , wherein the compressor, the four-way valve, the expansion valve, the first hydrothermal medium heat exchanger, The water-water heat exchanger, the second water heat medium heat exchanger, the first three-way valve, the second three-way valve, and a control device for controlling the auxiliary water heat medium heat exchanger, It is characterized by the following.

According to an eleventh aspect of the present invention, there is provided a water heater and a chiller according to any one of the first to tenth aspects, a fan coil for exchanging heat between the water and the air in an installed room, A blower that sends the exchanged air into the room.

According to a twelfth aspect of the present invention, there is provided a water cooler / heater according to any one of the first to tenth aspects, a fan coil for exchanging heat between the water and indoor air in an installed room, An air conditioning system, comprising: a fan coil unit including a blower that sends the exchanged air into the room.

  According to the first aspect of the present invention, the compressor is operated as necessary for temperature control, and the first water heat medium heat exchanger, the water water heat exchanger, and the second water heat medium heat exchanger are operated. Heat exchange is performed, so that the operation frequency of the heat pump including the compressor, the four-way valve, and the expansion valve can be reduced, and water at a predetermined temperature can be supplied stably. Thereby, individual air conditioning that can be switched to the cooling operation or the heating operation at low cost can be realized. In addition, by providing the first water heat medium heat exchanger, the water water heat exchanger, and the second water heat medium heat exchanger, the temperature of the water passed from the inlet of the feed pipe and the required water temperature can be reduced. Accordingly, fine water temperature control can be performed.

According to the first, third, and fifth aspects of the present invention, the first water heat transfer medium heat exchanger and the first water heat transfer medium heat exchanger are provided when a first three-way valve and a second three-way valve are provided and water is not supplied. When water is supplied without performing heat exchange by the second heat transfer medium heat exchanger, heat supply is performed by performing heat exchange by the first heat transfer medium heat exchanger and the second heat transfer medium heat exchanger. Or the first water heat medium heat exchanger, the second water heat medium heat exchanger, and when water is supplied by performing heat exchange with the water / water heat exchanger, respectively. Since the flow path of the water is changed, the temperature of the water can be finely controlled in accordance with the temperature of the water passed from the inlet of the feed pipe and the required water temperature, and the temperature of the water can be easily controlled.

According to the invention described in claim 5 , the first three-way valve is configured to be able to control the flow rate of water passing through the water-water heat exchanger, so that more flexible water temperature control is possible, The flow rate change by the first three-way valve enables fine control of the fan coil capacity by a minute flow rate change, and also corresponds to a partial load, reduces the load on the compressor, and allows a long-term operation. It is possible to reduce period energy consumption.

According to the invention as set forth in claims 4 and 6, when the temperature of the water passed through the inlet of the feed pipe is decreased, or when the temperature of the water passed through the inlet of the feed pipe is increased, Since the temperature of the water is decreased or increased by the heat exchange by the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water-water heat exchanger, the temperature of the water is easily controlled. be able to.

According to the eighth aspect of the invention, the load on the compressor can be reduced by providing the auxiliary heat transfer medium heat exchanger.

According to the ninth aspect of the present invention, the first case corresponds to the case where the temperature of the water passed through the inlet of the feed pipe is decreased or the case where the temperature of the water passed through the inlet of the feed pipe increases. Since the temperature of the water is reduced or increased by the heat exchange by the water heat medium heat exchanger, the second water heat medium heat exchanger, the water water heat exchanger, and the auxiliary water heat medium heat exchanger, Temperature control can be easily performed.

According to the second, seventh and tenth aspects of the present invention, the provision of the control device enables accurate and fine temperature control of the water according to the temperature of the water passed through the inlet of the feed pipe and the required water temperature. Becomes possible.

According to the invention as set forth in claims 11 and 12 , the cooling operation is performed at a low cost by providing the water / heater according to any one of claims 1 to 10 , a fan coil, and a blower. Alternatively, individual air conditioning that can be switched to the heating operation can be realized.

FIG. 2 is a device layout system diagram schematically illustrating the air conditioning system 1 according to Embodiment 1 of the present invention, and is a diagram illustrating a state in which a fan coil operation is being performed in a cooling setting. FIG. 2 is a diagram showing a state in which a thermo-off operation is performed in a cooling setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram illustrating a state in which a free cooling operation is performed in a cooling setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram illustrating a state in which a heat pump operation is performed in a cooling setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram showing a state in which a heat pump operation (ground heat) is performed in a cooling setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram showing a state in which a cooling water heat pump operation is performed in a cooling setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram showing a state in which a hot water heat pump operation is performed in a cooling setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram showing a state in which a fan coil operation is performed in a heating setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram showing a state in which a heat pump operation is being performed in a heating setting in the air conditioning system 1 of FIG. 1. FIG. 2 is a diagram illustrating a state in which a chilled water heat pump operation is performed in a heating setting in the air conditioning system 1 of FIG. 1. 2 is a list showing a control state of each component in the air conditioning system 1 of FIG. 1. FIG. 13 is an equipment arrangement system diagram schematically showing an air conditioner 1A according to Embodiment 2 of the present invention. FIG. 13 is an equipment arrangement system diagram schematically illustrating an air conditioning system 1B according to Embodiment 3 of the present invention. FIG. 14 is an equipment arrangement system diagram schematically showing an air conditioner 1C according to Embodiment 4 of the present invention. It is a list | wrist which shows the control state of each component in the air conditioning system 1B of FIG. 13 and the air conditioning apparatus 1C of FIG. It is an equipment arrangement | system | group system diagram which shows the outline of the air conditioning system 1D which concerns on Embodiment 5 of this invention. FIG. 21 is an equipment arrangement system diagram schematically showing an air conditioner 1E according to Embodiment 6 of the present invention. It is a list | wrist which shows the control state of each component in the air conditioning system 1D of FIG. 16 and the air conditioning apparatus 1E of FIG. FIG. 21 is an equipment arrangement system diagram schematically illustrating an air conditioning system 1F according to Embodiment 7 of the present invention. It is an equipment arrangement system diagram schematically showing an air conditioner 1G according to Embodiment 8 of the present invention. It is a list | wrist which shows the control state of each component in the air conditioning system 1F of FIG. 19 and the air conditioning apparatus 1G of FIG.

  Hereinafter, the present invention will be described based on the illustrated embodiment.

(Embodiment 1)
FIGS. 1 to 11 show an air conditioning system 1 according to Embodiment 1 of the present invention. FIG. The air conditioning system 1 is an air conditioner provided in a guest room of a building such as a hotel or a hospital, and includes a water heater / heater 2 and a fan coil unit 3. Further, the water heater 2 is provided with a feed pipe inlet 4, a feed pipe outlet 5, a return pipe inlet 6, and a return pipe outlet 7, and water is passed from the feed pipe inlet 4 to flow to the feed pipe outlet 5. And a return pipe through which water used in the fan coil unit 3 is passed from the outlet of the fan coil unit 3 to the return pipe inlet 6 to flow to the return pipe outlet 7. Are formed. The feed pipe inlet 4 is connected to the water pipe, the feed pipe outlet 5 is connected to the inlet of the fan coil unit 3 via the feed pipe, and the return pipe inlet 6 is connected to the outlet of the fan coil unit 3 via the return pipe. The return pipe outlet 7 is connected to a return water pipe. Each component of the water heater / heater 2 is controlled by a control device 8 implemented by a CPU (Central Processing Unit) or the like. Note that the same applies to the chiller / heater 2 in FIG. 2 and thereafter, which are controlled by the control device 8, so that the illustration is omitted.

  The water heater / heater 2 controls the temperature of the water passed through the feed pipe inlet 4 using a heat medium, and can stably supply water at a predetermined temperature by generating cold water or hot water. A device for returning used water to the return pipe outlet 7, and is used, for example, to supply water at a set temperature to the fan coil unit 3 to perform individual air conditioning that can be switched to a cooling operation or a heating operation. Device. The water heater / heater 2 mainly includes a compressor 11, a four-way valve 12, an expansion valve 13, a water heat medium heat exchanger (second water heat medium heat exchanger) 14, and a water heat medium heat exchanger. A first water heat medium heat exchanger 15, a water / water heat exchanger 16, a three-way valve (first three-way valve) 17, and a three-way valve (second three-way valve) 20; It is controlled by the device 8. A temperature sensor S1 for detecting the temperature of water near the feed pipe inlet 4, a temperature sensor S2 for detecting the temperature of water near the return pipe outlet 7, a temperature sensor S3 for detecting the temperature of water near the feed pipe outlet 5, Temperature sensors S4 for detecting the temperature of the air near the delivery pipe outlet 5 are provided.

  The compressor 11 exchanges heat with the water passed through the feed pipe inlet 4 or the water passed through the return pipe inlet 6 in the water heat medium heat exchanger 14 and the water heat medium heat exchanger 15 to change the temperature of the water. This is a device that compresses the heat medium and raises the temperature to perform control. The four-way valve 12 is a device that switches the flow path of the heat medium depending on whether an operation for increasing the temperature of water or an operation for decreasing the temperature is performed. The expansion valve 13 is a device for reducing the pressure of the heat medium. The compressor 11, the four-way valve 12, and the expansion valve 13 are connected to each other by a flow path through which the heat medium flows, thereby forming a heat medium flow path. As the heat medium flowing through the heat medium flow path, for example, a refrigerant such as Freon is used.

  The water heat medium heat exchanger 14 is a device for performing heat exchange between water passed through the return pipe inlet 6 and a heat medium flowing through the compressor 11, the four-way valve 12, and the expansion valve 13. The pipe and the heat medium flow passage are provided between the water / water heat exchanger 16 and the return pipe outlet 7 through the pipe. The water heat medium heat exchanger 15 is a device that exchanges heat between the water passed through the feed pipe inlet 4 and the heat medium flowing through the compressor 11, the four-way valve 12, and the expansion valve 13. The water pipe and the heat medium flow passage are provided between the feed pipe inlet 4 and the feed pipe outlet 5. The water heat medium heat exchanger 14 and the water heat medium heat exchanger 15 are such that when the water heater 2 generates cold water, the water heat medium heat exchanger 14 serves as a condenser and the water heat medium heat exchanger 15 evaporates. When operating as a heat exchanger and generating hot water, the water heat medium heat exchanger 14 operates as an evaporator and the water heat medium heat exchanger 15 operates as a condenser. That is, when the chiller / heater 2 generates chilled water, the water heat medium heat exchanger 14 raises the temperature of the water passed through the return pipe inlet 6, and the water heat medium heat exchanger 15 flows through the feed pipe inlet 4. When the temperature of the supplied water is lowered to generate hot water, the water heat medium heat exchanger 14 lowers the water flowing through the return pipe inlet 6, and the water heat medium heat exchanger 15 flows through the feed pipe inlet 4. It operates to raise the temperature of the incoming water.

  The water / water heat exchanger 16 is a device that performs heat exchange between water passed through the feed pipe inlet 4 and water passed through the return pipe inlet 6, and the water pipe is branched from the three-way valve 17. The pipe and the return pipe pass through and are disposed between the return pipe inlet 6 and the water heat medium heat exchanger 15. The water / water heat exchanger 16 raises the temperature of water passed through the return pipe inlet 6 when the chiller / heater 2 generates cold water, and increases the temperature of the water passed through the return pipe inlet 6 when generating hot water. Operate to lower the water temperature of

  The three-way valve 17 is a valve that switches between passing the water passed from the feed pipe inlet 4 to the water heat exchanger 15 or the water / heat exchanger 16. The three-way valve 20 passes water passed from the water heat medium heat exchanger 15 to the feed pipe outlet 5, or to the return pipe outlet 7 via the water / water heat exchanger 16 and the water heat medium heat exchanger 14. It is a valve that switches whether to pass.

  The fan coil unit 3 is a device arranged in a guest room of a building such as a hotel or a hospital to blow air at a set temperature, and mainly includes a fan coil 18 and a blower 19. The fan coil 18 is a device that performs heat exchange between water flowing from the delivery pipe outlet 5 and indoor air. The blower 19 is a device that blows air that has been heat-exchanged by the fan coil 18. A temperature / humidity sensor S4 for detecting the temperature of the air at the inlet of the blower 19 is provided.

  Next, the operation state of the air-conditioning system 1 shown in FIGS. 1 to 10 will be described based on the list shown in FIG.

  FIG. 11 is a list showing a control state of each component in the air-conditioning system 1 of FIG. 1 by the control device 8. In this table, the column of “Cool / Warm” indicates whether the air conditioning system 1 is operating in the cooling setting or the heating setting, and the column of “Operating mode” is the air conditioning system 1. , For example, fan coil operation, heat pump operation, etc., the column of “water temperature (° C.)” indicates the temperature of water passed through the feed pipe inlet 4, and the column on the right side of “compressor” indicates air conditioning. The control state of each component of the system 1 is shown. In addition, the numbers in the column of “No.” at the left end correspond to FIGS. 1 to 10, respectively.

  FIG. 1 shows a state in which the air-conditioning system 1 performs a fan coil operation in a cooling setting. At this time, since the water temperature detected by the temperature sensor S1 is 7 ° C. and the temperature of the water sent to the fan coil unit 3 only needs to be 7 ° C., the three-way valve 17 converts the water passed through the feed pipe inlet 4 into water heat. The water flows to the medium heat exchanger 15, the compressor 11 is not operated, and the heat exchange by the water heat medium heat exchanger 15 is not performed. 5 and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 12 ° C. Since this water may be allowed to flow to the return pipe outlet 7 as it is, the water is flowed to the return pipe outlet 7 without performing heat exchange by the water / water heat exchanger 16 and the water heat medium heat exchanger 14.

  FIG. 2 shows a state in which the air-conditioning system 1 is performing a thermo-off operation in a cooling setting. Although FIG. 2 shows the state of the cooling setting, the same operation is performed in the case of the heating setting. At this time, since the fan coil unit 3 is not operated, it is not necessary to send the water passed through the feed pipe inlet 4 to the fan coil unit 3. Therefore, the three-way valve 17 is opened in a direction in which water flows to the water heat medium heat exchanger 15, and the water flows to the water heat medium heat exchanger 15. The three-way valve 20 allows the water passed from the water heat medium heat exchanger 15 to flow to the return pipe outlet 7 via the water water heat exchanger 16 and the water heat medium heat exchanger 14. The compressor 11 is not operated, and the heat exchange by the water heat medium heat exchanger 15, the water water heat exchanger 16, and the water heat medium heat exchanger 14 is not performed.

  FIG. 3 shows a state in which the air-conditioning system 1 performs a free cooling operation in a cooling setting. This is an operation in which the chilled water is directly passed through a feed pipe when the chilled water is lower than room temperature, for example, about 10 ° C. or more. At this time, the water temperature detected by the temperature sensor S1 is 12 ° C., and the temperature of the water sent to the fan coil unit 3 may be 12 ° C. Therefore, as in the state shown in FIG. 4 flows into the water heat medium heat exchanger 15, the compressor 11 is not operated, heat exchange by the water heat medium heat exchanger 15 is not performed, and the three-way valve 20 is the water heat medium heat exchanger 15. The water that is passed through is sent to the sending pipe outlet 5, and the water is sent to the sending pipe outlet 5 and sent to the fan coil unit 3. The water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 17 ° C. Since this water may be allowed to flow to the return pipe outlet 7 as it is, the water is flowed to the return pipe outlet 7 without performing heat exchange by the water / water heat exchanger 16 and the water heat medium heat exchanger 14.

  FIG. 4 shows a state in which the air-conditioning system 1 performs a heat pump operation in a cooling setting. At this time, the water temperature detected by the temperature sensor S1 is 12 ° C., and the temperature of the water sent to the fan coil unit 3 needs to be 7 ° C. It flows to the heat medium heat exchanger 15. When the compressor 11 is operated, the heat medium of 5 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, heat exchange is performed by the water heat medium heat exchanger 15, and water is reduced to 7 ° C. , And is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 12 ° C. This water is not subjected to heat exchange by the water / water heat exchanger 16, but is subjected to heat exchange by the water heat medium heat exchanger 14. Since the heat medium of 19 ° C. is passed through the heat medium flow path in the water heat medium heat exchanger 14, the water is raised to 17 ° C. by heat exchange with the heat medium and is flown to the return pipe outlet 7. .

  FIG. 5 shows a state in which the air-conditioning system 1 is performing a heat pump operation (ground heat) in a cooling setting. At this time, the temperature of the water detected by the temperature sensor S1 is 20 ° C., and the temperature of the water sent to the fan coil unit 3 needs to be 7 ° C. Therefore, it is necessary to further lower the temperature of the water from the state shown in FIG. is there. Therefore, the three-way valve 17 allows the water passed through the feed pipe inlet 4 to flow to the water / water heat exchanger 16. The water flowing into the water / water heat exchanger 16 undergoes heat exchange with water at 12 ° C. which is passed through a return pipe inlet 6 to be described later, is reduced to 14 ° C., and is cooled to 14 ° C. Sent to The compressor 11 is operated and the heat medium of 5 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15 to lower the water to 7 ° C. Then, the three-way valve 20 causes the water passed from the water heat medium heat exchanger 15 to flow to the delivery pipe outlet 5, and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 12 ° C. This water exchanges heat with the water flowing from the three-way valve 17 by the water-water heat exchanger 16 and is raised to 18 ° C. Then, heat exchange by the water heat medium heat exchanger 14 is performed, and water is raised to 23 ° C. by heat exchange with the heat medium of 25 ° C. which is passed through the heat medium flow path, and is flowed to the return pipe outlet 7. .

  FIG. 6 shows a state in which the air-conditioning system 1 performs the cooling water heat pump operation in the cooling setting. At this time, the water temperature detected by the temperature sensor S1 is 32 ° C., and the temperature of the water sent to the fan coil unit 3 needs to be 7 ° C. Flow to the water heat exchanger 16. The water flowing into the water / water heat exchanger 16 undergoes heat exchange with water at 12 ° C. which is passed through a return pipe inlet 6 to be described later, is reduced to 14 ° C., and is cooled to 14 ° C. Sent to The compressor 11 is operated and the heat medium of 5 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15 to lower the water to 7 ° C. Then, the three-way valve 20 causes the water passed from the water heat medium heat exchanger 15 to flow to the delivery pipe outlet 5, and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 12 ° C. This water exchanges heat with the water flowing from the three-way valve 17 by the water-water heat exchanger 16 and is raised to 30 ° C. Then, heat exchange by the water heat medium heat exchanger 14 is performed, and water is raised to 38 ° C. by heat exchange with the heat medium of 45 ° C. which is passed through the heat medium flow path, and flows to the return pipe outlet 7. .

  FIG. 7 illustrates a state in which the air-conditioning system 1 performs a hot water heat pump operation in a cooling setting. At this time, the temperature of the water detected by the temperature sensor S1 is 45 ° C., and the temperature of the water sent to the fan coil unit 3 needs to be 12 ° C. Flow to the water heat exchanger 16. The water flowing into the water-water heat exchanger 16 undergoes heat exchange with water at 17 ° C. which is passed through a return pipe inlet 6 to be described later, and is reduced to 19 ° C. Sent to When the compressor 11 is operated, the heat medium of 10 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15, and the water drops to 12 ° C. Then, the three-way valve 20 causes the water passed from the water heat medium heat exchanger 15 to flow to the delivery pipe outlet 5, and the water is sent to the fan coil unit 3. The water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 17 ° C. This water exchanges heat with the water flowed from the three-way valve 17 by the water-water heat exchanger 16 and is raised to 43 ° C. Then, heat exchange by the water heat medium heat exchanger 14 is performed, and water is raised to 52 ° C. by heat exchange with the 54 ° C. heat medium passed through the heat medium flow path, and is flowed to the return pipe outlet 7. .

  FIG. 8 illustrates a state in which the air-conditioning system 1 performs the fan coil operation in the heating setting. At this time, the water temperature detected by the temperature sensor S1 is 45 ° C., and the temperature of the water sent to the fan coil unit 3 only needs to be 45 ° C. The water flows to the medium heat exchanger 15, the compressor 11 is not operated, and the heat exchange by the water heat medium heat exchanger 15 is not performed. 5 and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 40 ° C. Since this water may be allowed to flow to the return pipe outlet 7 as it is, the water is flowed to the return pipe outlet 7 without performing heat exchange by the water / water heat exchanger 16 and the water heat medium heat exchanger 14.

  FIG. 9 illustrates a state in which the air-conditioning system 1 performs a heat pump operation in a heating setting. At this time, the water temperature detected by the temperature sensor S1 is 25 ° C., and the temperature of the water sent to the fan coil unit 3 needs to be 45 ° C. Flow to the water heat exchanger 16. The water flowing into the water / water heat exchanger 16 undergoes heat exchange with water at 40 ° C. which is passed through a return pipe inlet 6 to be described later. Sent to When the compressor 11 is operated, the heat medium of 47 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15, and the water rises to 45 ° C. Then, the three-way valve 20 causes the water passed from the water heat medium heat exchanger 15 to flow to the delivery pipe outlet 5, and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 40 ° C. This water exchanges heat with the water flowed from the three-way valve 17 by the water-water heat exchanger 16 to be reduced to 27 ° C. Then, heat exchange by the water heat medium heat exchanger 14 is performed, and water is reduced to 21 ° C. by heat exchange with the heat medium of 19 ° C. which is passed through the heat medium flow path, and is flowed to the return pipe outlet 7. .

  FIG. 10 illustrates a state in which the air-conditioning system 1 performs a cold water heat pump operation in a heating setting. At this time, the water temperature detected by the temperature sensor S1 is 7 ° C., and the temperature of the water sent to the fan coil unit 3 needs to be 45 ° C. Flow to the water heat exchanger 16. The water flowing into the water / water heat exchanger 16 undergoes heat exchange with water at 40 ° C. which is passed through a return pipe inlet 6 to be described later. Sent to When the compressor 11 is operated, the heat medium of 47 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15, and the water rises to 45 ° C. Then, the three-way valve 20 causes the water passed from the water heat medium heat exchanger 15 to flow to the delivery pipe outlet 5, and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 40 ° C. This water exchanges heat with the water flowed from the three-way valve 17 by the water-water heat exchanger 16 and is reduced to 9 ° C. Then, heat exchange by the water heat medium heat exchanger 14 is performed, and water is reduced to 4 ° C. by heat exchange with the heat medium of 2 ° C. which is passed through the heat medium flow path, and is flowed to the return pipe outlet 7. .

  As described above, according to the air conditioning system 1, one of the fan coil operation, the free cooling operation, and the heat pump operation is selected according to the water temperature detected by the temperature sensor S1 and the temperature of the water sent to the fan coil unit 3. The heat exchange is performed by the water heat medium heat exchanger 15, the water water heat exchanger 16, and the water heat medium heat exchanger 14 as necessary, so that the operation frequency of the compressor 11 is reduced, and the predetermined temperature is reduced. Water can be supplied stably, and individual air conditioning that can be switched to cooling operation or heating operation at low cost can be realized. The water temperature can be finely controlled according to the water temperature. In addition, the temperature of the heat exchange water by the water heat medium heat exchanger 15, the water water heat exchanger 16, and the water heat medium heat exchanger 14 decreases when the temperature of the water is reduced or increased. Alternatively, since the temperature is raised, the temperature of the water can be easily controlled. In addition, the provision of the control device 8 enables accurate and detailed water temperature control.

  In addition, the flow path of water is changed by the control of the three-way valve 17 and the three-way valve 20, and the presence or absence of heat exchange by the water heat medium heat exchanger 15, the water water heat exchanger 16, and the water heat medium heat exchanger 14 is controlled. Therefore, the temperature of water can be easily controlled.

(Embodiment 2)
FIG. 12 is an equipment arrangement system diagram showing an air conditioner 1A according to Embodiment 2 of the present invention. This air conditioner 1A is different from the air conditioner system 1 according to Embodiment 1 in that the air conditioner 1A is not separated into a water heater / heater 2 and a fan coil unit 3 and is an integrated device. The components included in the air conditioner 1A are the same as the components included in the water heater / heater 2 and the fan coil unit 3 according to the first embodiment, and the operating states and the respective operating states based on the list shown in FIG. The same applies to the control states of the components.

  According to the air conditioner 1A, since it is an integrated device without being separated into the water heater / heater 2 and the fan coil unit 3, the integrated device can be integrated according to the state of the building to be installed. Can be applied where appropriate.

(Embodiment 3)
13 and 15 show an air conditioning system 1B according to Embodiment 3 of the present invention. FIG. 13 is a device arrangement system diagram schematically showing the air conditioning system 1B. FIG. It is a list | wrist which shows the control state of each component in the harmony system 1B. This air conditioning system 1B includes a water heater / heater 2B in place of the water heater / heater 2 according to Embodiment 1, and the water / water heater 2B is provided between the return pipe inlet 6 and the water / water heat exchanger 16. It is different from the air-conditioning system 1 according to Embodiment 1 in that a water heat medium heat exchanger 21 is provided. The auxiliary water heat medium heat exchanger 21 is a device that performs heat exchange between water passed through the return pipe inlet 6 and the heat medium flowing through the compressor 11, the four-way valve 12, and the expansion valve 13.

  Next, the operation and the like of such an air conditioning system 1B will be described based on a list shown in FIG.

  FIG. 15 is a list similar to the list of FIG. 11 according to Embodiment 1 and showing a control state of each component in air conditioning system 1B. No. in this table. No. 1 when the air-conditioning system 1B is performing the fan coil operation in the cooling setting, and 2, when the air conditioning system 1B is performing the thermo-off operation in the cooling setting, the heat exchange by the auxiliary water heat medium heat exchanger 21 is not performed. The control states of the other components are the same as those in FIGS. 1 and 2 according to the first embodiment. In addition, No. At 2, the three-way valve 17 is closed. In the case of the thermo-off operation, the three-way valve 17 may be controlled in this manner.

  No. in FIG. 3, when the air conditioning system 1B is performing the fan coil operation in the cooling setting, the water temperature detected by the temperature sensor S1 is 20 ° C., and the temperature of the water sent to the fan coil unit 3 is set to 7 ° C. Since it is necessary, the three-way valve 17 allows the water passed from the feed pipe inlet 4 to flow to the water / water heat exchanger 16. The water flowing into the water / water heat exchanger 16 undergoes heat exchange with water at 12 ° C. which is passed through a return pipe inlet 6 to be described later, and is lowered to 12 ° C. Sent to The compressor 11 is operated and the heat medium of 5 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15 to lower the water to 7 ° C. Then, the three-way valve 20 causes the water passed from the water heat medium heat exchanger 15 to flow to the delivery pipe outlet 5, and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 12 ° C. This water is once reduced to 8 ° C. by heat exchange with the heat medium of 5 ° C. which is passed through the heat medium flow path by the auxiliary water heat medium heat exchanger 21, and then the three-way valve is turned by the water / water heat exchanger 16. Heat exchange takes place between the water flowed from 17 and the temperature is raised to 16 ° C. Then, heat exchange by the water heat medium heat exchanger 14 is performed, and water is raised to 26 ° C. by heat exchange with the 35 ° C. heat medium passed through the heat medium flow path, and is flowed to the return pipe outlet 7. .

  In this way, the auxiliary water heat medium heat exchanger 21 performs heat exchange so as to temporarily lower the temperature of the water passed through the return pipe inlet 6. This is done by lowering the temperature of the water sent to the water heat medium heat exchanger 15 by lowering the temperature of the water passed through the water water heat exchanger 16 via the auxiliary water heat medium heat exchanger 21. This is to reduce the load on the compressor. Note that, in FIG. 4, no. The same applies to No. 5 in FIG. No. 6 is No. Same as 1.

  No. in FIG. 7, when the air conditioning system 1B is performing the heat pump operation in the heating setting, the water temperature detected by the temperature sensor S1 is 25 ° C., and the temperature of the water sent to the fan coil unit 3 needs to be 45 ° C. Therefore, the three-way valve 17 causes the water passed through the feed pipe inlet 4 to flow to the water-water heat exchanger 16. The water flowing into the water-water heat exchanger 16 undergoes heat exchange with 45 ° C. water passed through the return pipe inlet 6 described later, and is raised to 40 ° C. Sent to When the compressor 11 is operated, the heat medium of 47 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15, and the water rises to 45 ° C. Then, the three-way valve 20 causes the water passed from the water heat medium heat exchanger 15 to flow to the delivery pipe outlet 5, and the water is sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 40 ° C. This water is once raised to 45 ° C. by heat exchange with the 47 ° C. heat medium passed through the heat medium flow path by the auxiliary water heat medium heat exchanger 21, and then is subjected to the three-way valve by the water / water heat exchanger 16. Heat exchange takes place between the water flowed from step 17 and the temperature is lowered to 30 ° C. Then, heat exchange by the water heat medium heat exchanger 14 is performed, and water is reduced to 18 ° C. by heat exchange with the heat medium of 20 ° C. which is passed through the heat medium flow path, and is flowed to the return pipe outlet 7. . As described above, the auxiliary water heat medium heat exchanger 21 performs heat exchange so as to temporarily increase the temperature of the water passed through the return pipe inlet 6. As in the case of 3, the load on the compressor is reduced. Note that, in FIG. 8 is the same.

  As described above, according to the air-conditioning system 1B, since the auxiliary water heat medium heat exchanger 21 is provided, the water passing through the water water heat exchanger 16 via the auxiliary water heat medium heat exchanger 21 is provided. The temperature of the water sent to the hydrothermal medium heat exchanger 15 can be reduced or increased by decreasing or increasing the temperature of the water heat medium. This makes it possible to reduce the load on the compressor.

(Embodiment 4)
FIG. 14 is an equipment arrangement system diagram showing an air conditioner 1C according to Embodiment 4 of the present invention. This air conditioner 1C is different from the air conditioner system 1B according to Embodiment 3 in that the air conditioner 1C is not separated into a water heater / heater 2B and a fan coil unit 3 and is an integrated device. The components included in the air-conditioning apparatus 1C are the same as the components included in the water heater / heater 2B and the fan coil unit 3, and the operation state and the control state of each element based on the list shown in FIG. The same is true.

  According to the air conditioner 1C, since it is an integrated device without being separated into the water heater / heater 2B and the fan coil unit 3, the integrated device can be integrated according to the state of the installed building. Can be applied where appropriate.

(Embodiment 5)
FIGS. 16 and 18 show an air conditioning system 1D according to Embodiment 5 of the present invention. FIG. 16 is a device arrangement system diagram schematically showing the air conditioning system 1D. It is a list | wrist which shows the control state of each component in the harmony system 1D. This air conditioning system 1D includes a chiller / warmer 2D instead of the chiller / warmer 2 according to the first embodiment, and the chiller / warmer 2D shuts off water through which the three-way valve 17 passes through the feed pipe inlet 4. Or a valve for switching whether a part of the flow rate of the water passed from the feed pipe inlet 4 is passed to the water / water heat exchanger 16 and the remaining flow rate is passed to the return pipe outlet 7. It differs from the air conditioning system 1 according to Embodiment 1 in that the valve switches between passing the water passed through the inlet 4 through the three-way valve 17 and passing through the water heat medium heat exchanger 15. Further, the three-way valve 17 is configured to be able to freely control the flow rate of water passing through the water / water heat exchanger 16.

  Next, the operation and the like of such an air conditioning system 1D will be described based on a list shown in FIG.

  FIG. 18 is a list showing a control state of each component in the air-conditioning system 1D, similar to the list of FIG. 11 according to Embodiment 1. No. in this table. As shown in FIG. 1, when the air conditioning system 1B is performing the fan coil operation in the cooling setting, the three-way valve 20 allows the water passed from the feed pipe inlet 4 to flow to the water heat medium heat exchanger 15 and the three-way valve 17 Is closed. The control states of the other components are the same as in FIG. 1 according to the first embodiment.

  No. of FIG. 2, when the air-conditioning system 1D is performing the thermo-off operation in the cooling setting, the three-way valve 20 passes the water passed from the feed pipe inlet 4 to the three-way valve 17, and the three-way valve 17 is the return pipe outlet 7 Flow to The control states of the other components are the same as those in FIG. 2 according to the first embodiment.

  No. of FIG. 3, when the air conditioning system 1 </ b> D is performing the heat pump operation (ground heat) in the cooling setting, the three-way valve 20 passes the water passed from the feed pipe inlet 4 to the three-way valve 17, and the three-way valve 17. Passes all of the water through the water / water heat exchanger 16. The control states of the other components are the same as in FIG. 5 according to the first embodiment.

  No. of FIG. 4, when the air-conditioning system 1D is performing the cooling water heat pump operation in the cooling setting, the three-way valve 20 allows the water to be passed from the feed pipe inlet 4 to the three-way valve 17, and the three-way valve 17 Are all passed through the water / water heat exchanger 16. The control states of the other components are the same as those in FIG. 6 according to the first embodiment.

  No. of FIG. 5, when the air conditioning system 1D is performing the hot water heat pump operation in the cooling setting, the water temperature detected by the temperature sensor S1 is 45 ° C., and the temperature of the water sent to the fan coil unit 3 is set to 7 ° C. Since it is necessary, the three-way valve 20 causes the water passed from the feed pipe inlet 4 to flow to the three-way valve 17, and the three-way valve 17 allows a half of the water to flow to the water-water heat exchanger 16, The remaining half flow rate flows to the return pipe outlet 7. The water flowing into the water / water heat exchanger 16 undergoes heat exchange with water at 12 ° C. which is passed through a return pipe inlet 6 to be described later, and is lowered to 17 ° C. Sent to The compressor 11 is operated and the heat medium of 5 ° C. is passed through the heat medium flow path of the water heat medium heat exchanger 15, and further heat exchange is performed by the water heat medium heat exchanger 15 to lower the water to 7 ° C. Then, the air is sent to the sending pipe outlet 5 and sent to the fan coil unit 3. Water subjected to heat exchange in the fan coil 18 of the fan coil unit 3 is passed through the return pipe inlet 6 at a water temperature of 12 ° C. This water exchanges heat with the water flowing from the three-way valve 17 by the water-water heat exchanger 16 and is raised to 30 ° C. Then, heat exchange by the water heat medium heat exchanger 14 was performed, and water was raised to 40 ° C. by heat exchange with the heat medium of 52 ° C. which was passed through the heat medium flow path, and was flowed from the three-way valve 17. The water is raised to 42.5 ° C. by the remaining half flow rate of 45 ° C. water, and is flowed to the return pipe outlet 7. In addition, when the air conditioning system 1D is operating in the heating setting, that is, No. 1 in FIG. 6-No. The same control is performed for 8 as well.

  As described above, according to the air-conditioning system 1D, since the three-way valve 17 is configured to be able to control the flow rate of the water flowing from the feed pipe inlet 4 to the water-water heat exchanger 16, more flexible water is provided. Temperature control becomes possible, and the change in flow rate by the three-way valve 17 makes it possible to finely control the capacity of the fan coil 18 by a minute change in flow rate, and also to cope with partial load and reduce the load on the compressor. In addition, it is possible to reduce period energy consumption due to long-term operation.

(Embodiment 6)
FIG. 17 is an equipment arrangement system diagram showing an air conditioner 1E according to Embodiment 6 of the present invention. This air conditioner 1E is different from the air conditioner system 1D according to Embodiment 5 in that the air conditioner 1E is not separated into a water heater / heater 2D and a fan coil unit 3 and is an integrated device. The components included in the air-conditioning apparatus 1E are the same as the components included in the water heater / heater 2D and the fan coil unit 3, and the operation state and the control state of each element based on the list shown in FIG. The same is true.

  According to the air conditioner 1E, since it is an integrated device without being separated into the water heater / cooler 2D and the fan coil unit 3, the integrated device can be formed according to the state of the building to be installed. Can be applied where appropriate.

(Embodiment 7)
19 and 21 show an air-conditioning system 1F according to Embodiment 7 of the present invention. FIG. 19 is a device arrangement system diagram schematically showing the air-conditioning system 1F. FIG. It is a list | wrist which shows the control state of each component in the harmony system 1F. This air conditioning system 1F includes a chiller / heater 2F in place of the chiller / heater 2D according to Embodiment 5, and the chiller / heater 2F is provided between the return pipe inlet 6 and the water / water heat exchanger 16. It is different from the air conditioning system 1D according to Embodiment 5 in that a water heat medium heat exchanger 21 is provided. The auxiliary water heat medium heat exchanger 21 is the same as that according to the third embodiment, and the operation is also the same.

  As described above, according to this air-conditioning system 1F, since the auxiliary water heat medium heat exchanger 21 is provided, the water passing through the water water heat exchanger 16 via the auxiliary water heat medium heat exchanger 21 is provided. The temperature of the water sent to the hydrothermal medium heat exchanger 15 can be reduced or increased by decreasing or increasing the temperature of the water heat medium. This makes it possible to reduce the load on the compressor.

(Embodiment 8)
FIG. 20 is an equipment arrangement system diagram showing an air conditioner 1G according to Embodiment 8 of the present invention. This air conditioner 1G differs from the air conditioner system 1F according to Embodiment 7 in that the air conditioner 1G is not separated into a water heater / heater 2F and a fan coil unit 3 and is an integrated device. The components included in the air conditioner 1G are the same as the components included in the water heater / heater 2F and the fan coil unit 3, and the operation state and the control state of each component based on the list shown in FIG. The same is true.

  According to the air conditioner 1E, since it is an integrated device without being separated into the water heater / heater 2F and the fan coil unit 3, the integrated device can be integrated according to the state of the installed building. Can be applied where appropriate.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like within a range not departing from the gist of the present invention, the present invention is not limited thereto. Included in the invention. For example, in the above embodiment, the chiller / heaters 2, 2B, 2D, and 2F are configured as devices used in the air conditioning system, but may be configured as other devices, for example, required cold water or hot water. It may be configured as a chiller / heater used in a factory or plant equipment where accurate water temperature management is required.

1, 1B, 1D, 1F Air conditioning system 1A, 1C, 1E, 1G Air conditioner 2, 2B, 2D, 2F Water heater / cooler 3 Fan coil unit 4 Sending pipe inlet 5 Sending pipe outlet 6 Returning pipe inlet 7 Returning pipe outlet Reference Signs List 11 compressor 12 four-way valve 13 expansion valve 14 water heat medium heat exchanger (second water heat medium heat exchanger)
15 Water Heat Medium Heat Exchanger (First Water Heat Medium Heat Exchanger)
16 water-water heat exchanger 17 three-way valve (first three-way valve)
18 fan coil 19 blower 20 three-way valve (second three-way valve)
21 Auxiliary heat transfer medium heat exchanger

Claims (12)

The temperature of the water passed from the inlet of the feed pipe is controlled by using a heat medium to flow to the outlet of the feed pipe, so that water at a predetermined temperature can be stably supplied, and the used water is returned from the return pipe inlet. A water heater that returns to the return pipe outlet,
A compressor that compresses the heat medium to increase the temperature to perform the temperature control,
A four-way valve that switches the flow path of the heat medium, by performing an operation of increasing the temperature of the water, or performing an operation of decreasing the temperature of the water,
An expansion valve for decompressing the heat medium,
A first water heat medium heat exchanger that is disposed on the feed pipe inlet side and performs heat exchange between the water passed from the feed pipe inlet and the heat medium that is flowed by the expansion valve.
Water that is disposed downstream of the first hydrothermal medium heat exchanger in the water flow path and exchanges heat between the water passed through the feed pipe inlet and the used water. A water heat exchanger,
The water is disposed downstream of the water / water heat exchanger in the water flow path, and the water after the heat exchange is performed in the water / water heat exchanger, and the heat medium flowed by the expansion valve. A second hydrothermal medium heat exchanger that performs heat exchange between
The compressor is operated as necessary for the temperature control, and heat exchange is performed by the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water water heat exchanger. With
A first three-way valve that switches between passing the water passed from the feed pipe inlet to the first water heat medium heat exchanger, or passing the water to the water / water heat exchanger;
A second three-way valve for switching between passing the water passed from the feed pipe inlet to the feed pipe outlet or passing the water to the return pipe outlet,
The first three-way valve includes:
When the water is not supplied, when the water is supplied without performing heat exchange by the first water heat medium heat exchanger and the second water heat medium heat exchanger, or the first water heat medium heat exchanger When performing the heat exchange by the water heat medium heat exchanger and the second water heat medium heat exchanger to supply the water, the water is passed through the first water heat medium heat exchanger,
When the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water / water heat exchanger perform heat exchange to supply the water, the water is subjected to the water / water heat exchange. Through the exchanger,
The second three-way valve comprises:
When not supplying the water, pass the water to the return pipe outlet,
In the case where the water is supplied without performing heat exchange by the first water heat medium heat exchanger and the second water heat medium heat exchanger, the first water heat medium heat exchanger and the second water heat medium heat exchanger When the water is supplied by performing heat exchange by the water heat medium heat exchanger of the first embodiment, or the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water-water heat exchange When performing the heat exchange by a vessel to supply the water, pass the water to the sending pipe outlet,
A water heater and a water heater characterized by the above. The compressor, the four-way valve, the expansion valve, the first water heat medium heat exchanger, the water-water heat exchanger, the second water heat medium heat exchanger, the first three-way valve, and the With a control device for controlling the two three-way valve ,
The water heater / cooler according to claim 1, wherein: The first three-way valve is closed when not supplying the water,
The water cooler / heater according to claim 1, wherein: When decreasing the temperature of the water passed from the inlet of the sending pipe, the temperature of the water passed from the inlet of the sending pipe by the first heat transfer medium heat exchanger is reduced by heat exchange with the heating medium. The temperature of the water after use is increased by heat exchange with the heat medium by the second water heat medium heat exchanger,
When further reducing the temperature of the water passed from the feed pipe inlet, the temperature of the water passed from the feed pipe inlet by the water / water heat exchanger is lowered by heat exchange with the used water. The temperature of the water passed from the inlet of the feed pipe by the first water heat medium heat exchanger is reduced by heat exchange with the heat medium, and the temperature of the water after use by the water water heat exchanger Is raised by heat exchange with water passed from the inlet of the feed pipe, and the temperature of the used water is raised by heat exchange with the heat medium by the second water heat medium heat exchanger. ,
When raising the temperature of the water passed from the feed pipe inlet, the temperature of the water passed from the feed pipe inlet is raised by heat exchange with the used water by the water / water heat exchanger, The temperature of the water passed from the inlet of the sending pipe by the first water heat medium heat exchanger is increased by heat exchange with the heat medium, and the temperature of the water after use is reduced by the water water heat exchanger. While being lowered by heat exchange with water passed from the feed pipe inlet, the temperature of the water after use by the second water heat medium heat exchanger is lowered by heat exchange with the heat medium,
Hot and cold water dispenser according to any one of claims 1 or 3, characterized in that. The temperature of the water passed from the inlet of the feed pipe is controlled by using a heat medium to flow to the outlet of the feed pipe, so that water at a predetermined temperature can be stably supplied, and the used water is returned from the return pipe inlet. A water heater that returns to the return pipe outlet,
A compressor that compresses the heat medium to increase the temperature to perform the temperature control,
A four-way valve that switches the flow path of the heat medium, by performing an operation of increasing the temperature of the water, or performing an operation of decreasing the temperature of the water,
An expansion valve for decompressing the heat medium,
A first water heat medium heat exchanger that is disposed on the feed pipe inlet side and performs heat exchange between the water passed from the feed pipe inlet and the heat medium that is flowed by the expansion valve.
Water that is disposed downstream of the first hydrothermal medium heat exchanger in the water flow path and exchanges heat between the water passed through the feed pipe inlet and the used water. A water heat exchanger,
The water is disposed downstream of the water / water heat exchanger in the water flow path, and the water after the heat exchange is performed in the water / water heat exchanger, and the heat medium flowed by the expansion valve. A second hydrothermal medium heat exchanger that performs heat exchange between
The compressor is operated as necessary for the temperature control, and heat exchange is performed by the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water water heat exchanger. With
Closing the water passed through the feed pipe inlet, or passing a part of the flow rate of the water passed from the feed pipe inlet to the return pipe outlet, and the flow rate of the water not passing through the return pipe outlet A first three-way valve capable of switching the flow through the water-water heat exchanger and freely controlling the flow rate;
A second three-way valve that switches between passing the water passed from the feed pipe inlet to the first three-way valve, or passing the water to the first water heating medium heat exchanger,
The first three-way valve includes:
When not supplying the water, pass the water to the return pipe outlet,
When supplying the water without performing heat exchange by the first water heat medium heat exchanger and the second water heat medium heat exchanger, closing the water,
When the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water / water heat exchanger perform heat exchange to supply the water, the water is subjected to the water / water heat exchange. Through an exchanger, or pass a part of the flow rate of the water to the return pipe outlet, pass the flow rate of the water not to the return pipe outlet to the water-water heat exchanger,
The second three-way valve is
When supplying the water without performing heat exchange by the first water heat medium heat exchanger and the second water heat medium heat exchanger, the water is supplied to the first water heat medium heat exchanger. Through
When the supply of water is not performed, or the first water heat medium heat exchanger, the second water heat medium heat exchanger, and the water-water heat exchanger perform heat exchange to supply the water. If so, passing said water through said first three-way valve;
A water heater and a water heater characterized by the above. When lowering the temperature of the water passed through the feed pipe inlet, the temperature of the water passed from the feed pipe inlet by the water / water heat exchanger is lowered by heat exchange with the used water, The temperature of the water passed through the feed pipe inlet by the first water heat medium heat exchanger is reduced by heat exchange with the heat medium, and the temperature of the water after use is reduced by the water water heat exchanger. While being raised by heat exchange with the water passed from the feed pipe inlet, the temperature of the water after use by the second water heat medium heat exchanger is raised by heat exchange with the heat medium,
When raising the temperature of the water passed from the feed pipe inlet, the temperature of the water passed from the feed pipe inlet is raised by heat exchange with the used water by the water / water heat exchanger, The temperature of the water passed from the inlet of the sending pipe by the first water heat medium heat exchanger is increased by heat exchange with the heat medium, and the temperature of the water after use is reduced by the water water heat exchanger. While being lowered by heat exchange with water passed from the feed pipe inlet, the temperature of the water after use by the second water heat medium heat exchanger is lowered by heat exchange with the heat medium,
The water cooler / heater according to claim 5 , wherein: The compressor, the four-way valve, the expansion valve, the first water heat medium heat exchanger, the water-water heat exchanger, the second water heat medium heat exchanger, the first three-way valve, and the A control device for controlling the second three-way valve,
The water cooler / heater according to claim 6 , wherein: Auxiliary water that is disposed downstream of the first hydrothermal medium heat exchanger in the water flow path and exchanges heat between the used water and the heat medium flowing through the expansion valve. Equipped with a heat medium heat exchanger,
The water-water heat exchanger performs heat exchange between the water after the heat exchange in the auxiliary water heat medium heat exchanger and the heat medium flowing by the expansion valve.
The water heater / cooler according to any one of claims 1 to 6 , wherein: When lowering the temperature of the water passed through the feed pipe inlet, the temperature of the water passed from the feed pipe inlet by the water / water heat exchanger is lowered by heat exchange with the used water, The temperature of the water passed from the inlet of the feed pipe by the first water heat medium heat exchanger is reduced by heat exchange with the heat medium, and the temperature of the used water is reduced by the auxiliary water heat medium heat exchanger. The temperature is decreased by heat exchange with the heat medium, and the temperature of the used water is increased by the water-water heat exchanger by heat exchange with water passed through the feed pipe inlet, and The temperature of the water after use is raised by heat exchange with the heat medium by the water heat medium heat exchanger of 2,
When raising the temperature of the water passed from the feed pipe inlet, the temperature of the water passed from the feed pipe inlet is raised by heat exchange with the used water by the water / water heat exchanger, The temperature of the water passed from the inlet of the feed pipe by the first water heat medium heat exchanger is increased by heat exchange with the heat medium, and the temperature of the water after use by the auxiliary water heat medium heat exchanger is increased. The temperature is raised by heat exchange with the heat medium, and the temperature of the used water is lowered by the water-water heat exchanger by heat exchange with water passed through the feed pipe inlet, and the The temperature of the water after use is lowered by heat exchange with the heat medium by the water heat medium heat exchanger of 2,
The water heater / cooler according to claim 8 , wherein: The compressor, the four-way valve, the expansion valve, the first water heat medium heat exchanger, the water-water heat exchanger, the second water heat medium heat exchanger, the first three-way valve, the first 2 comprising a three-way valve, and a control device for controlling the auxiliary water heat medium heat exchanger,
Hot and cold water dispenser according to any one of claims 8 or 9, characterized in that. A water heater and a water heater according to any one of claims 1 to 10,
A fan coil that performs heat exchange between the water and the installed room air;
A blower that sends the heat-exchanged air into the room,
An air conditioner comprising: A water heater and a water heater according to any one of claims 1 to 10,
A fan coil that includes a fan coil that performs heat exchange between the water and the installed room air, and a blower that sends the heat-exchanged air into the room,
An air conditioning system comprising:

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