JP2016211825A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system which freely performs cooling and heating according to a temperature in a room or zone in an easy method.SOLUTION: An air conditioning system includes: a fan coil unit 10 including a coil 11, a fan 12, a control valve 13, a heat medium supply pipe 14, a heat medium discharge pipe 15, a temperature sensor 17, and a controller 18 for operating the control valve 13; a heat medium supply device 20; a thermal medium feed pipe 22; a thermal medium return pipe 23; a cold heat medium feed pipe 26; a cold heat medium return pipe 27; a first cutoff valve 31 to a fourth cutoff valve 34; and a control part 40. When an indoor temperature TR is lower than an indoor air temperature set value TS2, the first and second cutoff valves 31, 32 are opened and the third and fourth cutoff valves 33, 34 are closed. When the indoor temperature TR is higher than the indoor air temperature set value TR1, the third and fourth cutoff valves 33, 34 are opened and the first and second cutoff valves 31, 32 are closed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system, and more particularly to a structure of an air conditioning system used in a building in which various offices, stores and the like are occupying.

  In buildings where various offices, stores, etc. are occupying, it is sent to the fan coil unit arranged in each room or zone so that it can be air-conditioned by switching between cooling or heating arbitrarily in each room or zone There has been proposed an air conditioning system in which the heat medium can be switched between cold water and hot water (see, for example, Patent Document 1).

  The fan coil unit of the system described in Patent Document 1 includes a so-called two-tube fan coil unit including two pipes, an inlet pipe for a heat medium (hot water or cold water) and a discharge pipe for a heat medium (hot water or cold water). A shutoff valve is provided in each of the cold water feed pipe connected to the heat medium inlet pipe of the fan coil unit, the hot water feed pipe, the cold water return pipe connected to the refrigerant discharge pipe of the fan coil unit, and the hot water return pipe. It is an air conditioning system. Then, the shut-off valves arranged in the chilled water feed pipe and the chilled water return pipe are opened, the shut-off valves placed in the hot water feed pipe and the hot water return pipe are closed, and the chilled water is fed to the fan coil unit for cooling. In addition, by opening each shut-off valve arranged in the hot water feed pipe and the hot water return pipe and closing each shut-off valve placed in the cold water feed pipe and the cold water return pipe, water is sent to the fan coil unit for heating. Switching between cooling and heating.

  However, the system described in Patent Document 1 needs to manually open and close each shut-off valve from an input terminal, and it is difficult to freely switch between cooling and heating according to room temperature or zone temperature. There was a problem.

  On the other hand, it has two coils, a cold water coil through which cold water flows and a hot water coil through which hot water flows, and so-called four pipes including four pipes, a hot water inlet pipe, a hot water discharge pipe, a cold water inlet pipe, and a cold water discharge pipe. Many type fan coil units are also used. Since this four-tube fan coil unit does not need to switch the heat medium through which each fan coil unit flows, it can be freely cooled and heated according to the temperature of the room or zone. However, in an air conditioning system using a four-tube fan coil unit, in addition to an increase in size of the fan coil unit, four tubes are provided between a heat medium supply device such as a refrigerator or a boiler and the fan coil unit. There is a problem that the installation cost becomes high because it is necessary to arrange them.

JP-A-7-83446

  Therefore, an object of the present invention is to perform cooling and heating freely according to the temperature of a room or a zone by a simple method.

  The air-conditioning system of the present invention includes a coil that exchanges heat with a room air flowing outside through a hot medium having a temperature higher than room air or a cold medium having a temperature lower than room air, and the coil A fan for flowing room air to the outside, a control valve for adjusting a flow rate of the heating medium or the low heating medium flowing inside the coil, and a heating medium supply pipe for supplying the heating medium or the cooling medium to the coil A heat medium discharge pipe for discharging the hot medium or the cold medium from the coil, a temperature sensor for detecting indoor air temperature, and a controller for operating the control valve according to the indoor air temperature detected by the temperature sensor; A fan coil unit, a heat medium supply device for supplying the hot medium or the cold medium, and a heat medium supply pipe from the heat medium supply device to the heat medium supply pipe A heating medium feed pipe for feeding the heating medium, a heating medium return pipe for returning the heating medium from the heating medium discharge pipe to the heating medium supply apparatus, and the cooling medium from the heating medium supply apparatus to the heating medium supply pipe. A cooling medium feeding pipe to be sent, a cooling medium return pipe for returning the cooling medium from the heating medium discharge pipe to the heating medium supply device, a first shut-off valve disposed in the heating medium feeding pipe, and the heating medium return pipe Receiving a room temperature information value from the controller, a second shut-off valve disposed in the cooling medium feed pipe, a fourth shut-off valve disposed in the cooling medium return pipe, and a controller. A controller that opens and closes the first to fourth shut-off valves, and when the room temperature information value is lower than a set value of the room air temperature, the first shut-off valve and the second shut-off valve Open the third shut-off valve and the fourth shut-off valve; When the indoor temperature information value is higher than the indoor air temperature set value, the third cutoff valve and the fourth cutoff valve are opened, and the first cutoff valve and the second cutoff valve are opened. The air conditioning system that closes.

  In the air conditioning system of the present invention, the control unit transmits the indoor air temperature setting value to the controller, and the controller receives the indoor air temperature setting value received from the control unit by the indoor temperature detected by the temperature sensor. The control valve is operated in accordance with the room temperature, and the control valve is operated when the indoor temperature detected by the temperature sensor is higher than the indoor air temperature set value received from the control unit. The heating mode to be closed, and when the indoor temperature detected by the temperature sensor is higher than the indoor air temperature set value received from the control unit, the control valve is operated according to the indoor temperature, and the temperature sensor When the indoor temperature detected in step (b) is lower than the indoor air temperature set value received from the control unit, it is possible to operate in a cooling mode in which the control valve is closed. The control unit opens the first cutoff valve and the second cutoff valve, closes the third cutoff valve and the fourth cutoff valve, operates the controller in the heating mode, and It is also preferable to open the 3 shutoff valve and the fourth shutoff valve, close the first shutoff valve and the second shutoff valve, and operate the controller in the cooling mode.

  The air conditioning system of the present invention includes a plurality of fan coil units, and the control unit receives each room temperature information value from each controller of the plurality of fan coil units, and all of the room temperature information values are the indoor air. When the temperature is lower than the set temperature, the first shut-off valve and the second shut-off valve are opened, the third shut-off valve and the fourth shut-off valve are closed, and all the indoor temperature information values are all set. Is higher than the indoor air temperature set value, the third shut-off valve and the fourth shut-off valve may be opened, and the first shut-off valve and the second shut-off valve may be closed. It is.

  The air conditioning system of the present invention includes a plurality of fan coil units, wherein the control unit receives each room temperature information value from each controller of the plurality of fan coil units, and an average value of each room temperature information value is the room temperature. When the air temperature is lower than the set value, the first shut-off valve and the second shut-off valve are opened, the third shut-off valve and the fourth shut-off valve are closed, and each of the room temperature information values When the average value is higher than the indoor air temperature set value, the third cutoff valve and the fourth cutoff valve are opened, and the first cutoff valve and the second cutoff valve are closed. Is also suitable.

  The air conditioning system of the present invention includes a plurality of fan coil units, and the control unit receives each room temperature information value from each controller of the plurality of fan coil units, and the specific one of each room temperature information value is the When the indoor air temperature is lower than the set value, the first shut-off valve and the second shut-off valve are opened, the third shut-off valve and the fourth shut-off valve are closed, and each indoor temperature information value When the specific one is higher than the indoor air temperature set value, the third cutoff valve and the fourth cutoff valve are opened, and the first cutoff valve and the second cutoff valve are closed. This is also preferable.

  In the air conditioning system of the present invention, the control unit transmits the indoor air temperature set value to the controllers, and the controllers receive the indoor temperatures detected by the temperature sensors from the control unit. When the temperature is lower than the air temperature set value, the control valves are operated according to the room temperatures, and the room temperatures detected by the temperature sensors are lower than the room air temperature set values received from the control unit. The heating mode in which each control valve is closed when high, and the room temperature detected by each temperature sensor is set to each room temperature when the room air temperature set value received from the control unit is higher. In response, each control valve is operated, and each control valve is closed when each indoor temperature detected by each temperature sensor is lower than the indoor air temperature set value received from the control unit. And the control unit opens the first shut-off valve and the second shut-off valve, closes the third shut-off valve and the fourth shut-off valve, and All the controllers are operated in the heating mode, the third shut-off valve and the fourth shut-off valve are opened, the first shut-off valve and the second shut-off valve are closed, and all the controllers are cooled. It is also preferable to operate in the mode.

  The present invention has an effect that cooling and heating can be performed freely according to the temperature of a room or a zone by a simple method.

It is a distribution diagram showing the composition of the air-conditioning system in the embodiment of the present invention. It is a graph which shows operation | movement in the air_conditioning | cooling mode of the control valve of the air conditioning system in embodiment of this invention. It is a graph which shows operation | movement of the heating mode of the control valve of the air conditioning system in embodiment of this invention. It is a systematic diagram which shows the structure of the air conditioning system in other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the air conditioning system 100 of this embodiment includes a two-tube fan coil unit 10 having a heat medium supply pipe 14 and a heat medium discharge pipe 15, a controller 18 of the fan coil unit 10, and a data bus. The control part 40 connected by 41, the boiler 21, and the refrigerator 25 are comprised, and the heat medium supply apparatus 20 which supplies a thermal medium or a cooling medium is provided. In the embodiment shown in FIG. 1, one fan coil unit 10 is installed in each room or each zone in the building, but a plurality of fan coil units 10 are arranged as in other embodiments described later. Also good.

  The heat medium supply device 20 and the fan coil unit 10 are composed of a heat medium supply tube 22 that sends a heat medium from the boiler 21 of the heat medium supply device 20 to the heat medium supply tube 14, and a heat medium supply device 20 from the heat medium discharge tube 15. A heating medium return pipe 23 for returning the heating medium to the boiler 21, a cooling medium feed pipe 26 for sending the cooling medium from the refrigerator 25 of the heating medium supply device 20 to the heating medium supply pipe 14, and a heating medium from the heating medium discharge pipe 15. A cooling medium return pipe 27 that returns the cooling medium to the refrigerator 25 of the supply device 20 is connected. In addition, a first shut-off valve 31 to a fourth shut-off valve 34 are arranged in the hot-medium feed pipe 22, the hot-heat medium return pipe 23, the cold-heat medium feed pipe 26, and the cold-heat medium return pipe 27, respectively. Each shut-off valve 31 to 34 is an electric valve, and is opened and closed by the control unit 40.

  As shown in FIG. 1, the fan coil unit 10 exchanges heat with indoor air flowing outside through a hot medium having a higher temperature than indoor air or a cold medium having a lower temperature than indoor air. A coil 11 to be performed, a fan 12 for flowing room air to the outside of the coil 11, a control valve 13 for adjusting a flow rate of a heating medium or a low heating medium flowing inside the coil 11, and a heating medium or a cooling medium to the coil 11. A heat medium supply pipe 14 to be supplied, a heat medium discharge pipe 15 that discharges the thermal medium or the cold medium from the coil 11, a temperature sensor 17 that detects the indoor air temperature, and a controller 18 are provided. The control valve 13 and the fan 12 are connected to the controller 18 and operate according to a command from the controller 18. The temperature sensor 17 is connected to the controller 18 and inputs detected indoor temperature data to the controller 18. The controller 18 is connected to the control unit 40 via the data bus 41, and transmits / receives indoor temperature information values TR detected by the temperature sensor 17 and indoor temperature set values TS1, TS2 input from another device (not shown).

  The controller 18 is configured to operate the control valve 13 as shown in FIGS. 2 and 3 based on the room temperature TR detected by the temperature sensor 17 and the room temperature set values TS1 and TS2 received from the control unit 40. And.

  In the cooling mode, as shown in FIG. 2, when the room temperature TR detected by the temperature sensor 17 becomes higher than the room temperature set value TS1 (cooling set value) received from the control unit 40 (TR ≧ TS1), the room temperature Between the set value TS1 and the temperature T1, the valve opening is changed from 0% (fully closed) to 100% (fully opened) in proportion to the room temperature TR, and when the room temperature TR becomes equal to or higher than the temperature T1, the valve opening is changed. Is kept at 100% (fully open). Further, when the room temperature TR detected by the temperature sensor 17 is lower than the room temperature set value TS1 (TR <TS1), the valve opening degree is kept at 0% (fully closed). As shown in FIG. 3, in the heating mode, when the room temperature TR detected by the temperature sensor 17 becomes lower than the room temperature setting value TS2 (heating setting value) received from the control unit 40 (TR ≦ TS2), the room temperature Between the set value TS2 and the temperature T2, the valve opening is changed from 0% (fully closed) to 100% (fully opened) in proportion to the room temperature TR, and when the room temperature TR becomes the temperature T2 or less, the valve opening is changed. Is kept at 100% (fully open). Further, when the room temperature TR detected by the temperature sensor 17 is higher than the room temperature set value TS2 (TR> TS2), the valve opening degree is kept at 0% (fully closed). The room temperature set value TS1 and the room temperature set value TS2 can be set freely, but between the room temperature set value TS1 (cooling set value) and the room temperature set value TS2 (heating set value). Is provided with a temperature difference ΔTS so as to prevent hunting in the operation mode. During this temperature difference ΔTS, the opening degree of the control valve 13 is maintained at 0% in any mode.

  The operation of the air conditioning system 100 configured as described above will be described. As described above, the room temperature set values TR1 and TR2 are input to the control unit 40 from another device (not shown). The room temperature set values TR1 and TR2 are input to the controller 18 of the fan coil unit 10 via the data bus 41. The room temperature TR detected by the temperature sensor 17 is input to the controller 18, and the information value (room temperature information value) of the room temperature TR is input to the control unit 40 via the data bus.

  If the indoor temperature set value is the indoor temperature set value TS1 (cooling set value) shown in FIG. 2 and the indoor temperature TR detected by the temperature sensor 17 is higher than TS1 (TR ≧ TS1), the control unit 40 The controller 18 is operated in the cooling mode. Further, the control unit 40 closes the first and second shutoff valves 31 and 32 and opens the third and fourth shutoff valves 33 and 34. As a result, the cold medium (cold water) from the refrigerator 25 is [refrigerator 25 → cold medium feed pipe 26 → third shutoff valve 33 → heat medium supply pipe 14 → control valve 13 → coil 11 → heat medium discharge pipe 15 → The air flows through the fourth shut-off valve 34 → the cooling medium return pipe 27 → the refrigerator 25], and the air flowing outside the coil 11 is cooled by the fan 12 to cool the room. Thereafter, the opening degree of the control valve 13 increases as the indoor temperature TR detected by the temperature sensor 17 increases. On the other hand, when the room temperature TR detected by the temperature sensor 17 decreases and becomes lower than the room temperature set value TS1 (cooling set value), the control unit 40 continues the operation of the controller 18 in the cooling mode. To do.

  When the room temperature TR detected by the temperature sensor 17 further decreases and reaches the room temperature setting value TS2 (heating setting value) shown in FIG. 3 (TR ≦ TS2), the control unit 40 cools the controller 18. Switch from mode to heating mode. Further, the control unit 40 opens the first and second cutoff valves 31 and 32 and closes the third and fourth cutoff valves 33 and 34. As a result, the heating medium (hot water) from the boiler 21 is [boiler 21 → heating medium feed pipe 22 → first shutoff valve 31 → heating medium supply pipe 14 → control valve 13 → coil 11 → heating medium discharge pipe 15 → second. The air flows through the shut-off valve 32 → the heating medium return pipe 23 → the boiler 21], and the air flowing to the outside of the coil 11 is heated by the fan 12, and the room is heated. Thereafter, the opening degree of the control valve 13 increases as the indoor temperature TR detected by the temperature sensor 17 decreases.

  Thus, in the air conditioning system 100 of the present embodiment, when the room temperature TR detected by the temperature sensor 17 becomes higher than the room temperature set value TS1 (cooling set value), the control unit 40 cools the controller 18. In addition to switching to the mode, the first and second shut-off valves are closed, the third and fourth shut-off valves are opened, and the cooling medium is controlled to flow through the coil 11. Similarly, when the room temperature detected by the temperature sensor 17 becomes higher than the room temperature setting value TS2 (heating setting value), the control unit 40 switches the controller 18 to the heating mode and performs the first and second cutoffs. The valve is opened and the third and fourth shut-off valves are closed, and the heating medium is controlled to flow through the coil 11. For this reason, in the air conditioning system 100 of this embodiment, it is possible to match the operation mode of the controller 18 and the type of the heat medium flowing therethrough, and to smoothly switch between cooling and heating.

  The operation when the room temperature TR decreases has been described above, but the operation when the room temperature TR increases increases because the heating mode and the cooling mode are reversed and are the same operations. Is omitted.

  The air conditioning system 100 of the embodiment described above changes the operation of the controller 18 between the cooling mode and the heating mode according to the room temperature detected by the temperature sensor 17, and opens and closes the first cutoff valve 31 to the fourth cutoff valve 34. Thus, since the refrigerant supplied to the coil 11 is switched between the cooling medium and the heating medium, there is an effect that cooling and heating can be performed freely according to the temperature of the room or the zone.

  In the embodiment described above, the controller 18 and the control unit 40 have been described as separate control devices. However, any control device that performs the same function may be combined into one control device.

  Next, an air conditioning system 200 according to another embodiment of the present invention will be described with reference to FIG. In this embodiment, two fan coil units 10a and 10b are provided for one room or zone. The element “a” constituting the fan coil unit 10 a is described last, and the element “b” constituting the fan coil unit 10 b is described last. Moreover, the same code | symbol is attached | subjected to the element similar to the element demonstrated with reference to FIGS. 1-3, and description is abbreviate | omitted.

  As shown in FIG. 4, each of the fan coil units 10a and 10b includes temperature sensors 17a and 17b, controllers 18a and 18b, and control valves 13a and 13b, respectively. The controllers 18a and 18b are connected to each other by the data bus 41 and also to the control unit 40. The heating medium feed pipe 22 is connected to the heating medium supply pipes 14a and 14b of the fan coil units 10a and 10b, and the heating medium return pipe 23 is connected to the heating medium discharge pipes 15a and 15b of the fan coil units 10a and 10b. It is connected to the. Similarly, the cooling medium feed pipe 26 is connected to the heating medium supply pipes 14a and 14b of the fan coil units 10a and 10b, and the cooling medium return pipe 27 is connected to the heating medium of the fan coil units 10a and 10b. It is connected to the discharge pipes 15a and 15b.

  The operation of the air conditioning system 200 configured as described above will be described. As described above, the room temperature set values TS1 and TS2 are input to the control unit 40 from another device (not shown). The indoor temperature set values TS1, TS2 are input to the controllers 18a, 18b of the fan coil units 10a, 10b via the data bus 41. The indoor temperatures TRa and TRb detected by the temperature sensors 17a and 17b are input to the controllers 18a and 18b, and information values of the indoor temperatures are input to the control unit 40 via the data bus.

  As shown in FIG. 4, in the air conditioning system 200 of the present embodiment, for the two fan coil units 10a and 10b, the heating medium feed pipe 22, the heating medium return pipe 23, the cooling medium feed pipe 26, and the cooling medium return pipe. 27. Since the first shut-off valve 31 to the fourth shut-off valve 34 are common, different heat media cannot be passed through the two fan coil units 10a and 10b at the same time. That is, the cooling medium cannot flow through one fan coil unit 10a and the heating medium cannot flow through the other fan coil unit 10b. For this reason, when the indoor temperatures TRa and TRb detected by the plurality of temperature sensors 17a and 17b are different, the controller 40 operates the controllers 18a and 18b and the shut-off valves 31 to 34 as described below.

  First, when both of the room temperatures TRa and TRb are higher than the room temperature set value TS1 (cooling set value) (TRa ≧ TS1 and TRb ≧ TS1), the controller 40 sets both the controllers 18a and 18b in the cooling mode. Operate with. Further, as in the embodiment described above, the control unit 40 closes the first and second shutoff valves 31 and 32 and opens the third and fourth shutoff valves 33 and 34. As a result, the cooling medium (cold water) from the refrigerator 25 is [refrigerator 25 → cooling medium feed pipe 26 → third cutoff valve 33 → heating medium supply pipes 14a, 14b → control valves 13a, 13b → coils 11a, 11b → The heat medium discharge pipe 15 → the fourth shutoff valve 34 → the cooling medium return pipe 27 → the refrigerator 25] flows, and the air flowing outside the coils 11a and 11b is cooled by the fans 12a and 12b, thereby cooling the room.

  Further, when both of the room temperatures TRa and TRb are lower than the room temperature set value TS2 (heating set value) (TRa ≦ TS2 and TRb ≦ TS2), the control unit 40 sets both the controllers 18a and 18b to the heating mode. Operate with. Further, similarly to the embodiment described above, the control unit 40 opens the first and second cutoff valves 31 and 32 and closes the third and fourth cutoff valves 33 and 34. As a result, the heating medium (hot water) from the boiler 21 is [boiler 21 → heating medium feed pipe 22 → first cutoff valve 31 → heating medium supply pipes 14a and 14b → control valves 13a and 13b → coils 11a and 11b → heating medium. The exhaust pipe 15 → the second shutoff valve 32 → the heating medium return pipe 23 → the boiler 21] flows, and the air flowing outside the coils 11a and 11b is warmed by the fans 12a and 12b, thereby heating the room.

  Further, when there is a difference between the indoor temperatures TRa and TRb, the controller 40 operates the controllers 18a and 18b and the control valves 13a and 13b by the following two methods. First, the first method calculates the average value of each room temperature TRa, TRb, and assumes that the average room temperature TRm is the representative temperature of the room or zone in which the two fan coil units 10a, 10b are arranged. The operation modes 18a and 18b are set and the shut-off valves 31 to 34 are switched. For example, the room temperature TRa is higher than the room temperature set value TS1 (cooling set value), the room temperature TRb is lower than the room temperature set value TS1 (cooling set value), and the average room temperature Tm is the room temperature set value TS1. When higher than (the set value for cooling), the control unit 40 operates the controllers 18a and 18b of the fan coil units 10a and 10b in the cooling mode, and closes the first cutoff valve 31 and the second cutoff valve 32. Then, the third shut-off valve 33 and the fourth shut-off valve 34 are opened, and the cooling medium (cold water) is passed through the coils 11a and 11b from the refrigerator 25. At this time, since the indoor temperature TRa detected by the temperature sensor 17a is higher than the indoor temperature set value TS1 (cooling set value), the adjustment valve 13a of the fan coil unit 10a is opened according to the indoor temperature TRa as shown in FIG. Changes, and the fan coil unit 10a cools indoor air. Since the fan coil unit 10b is also operating in the cooling mode, even when the room temperature TRb detected by the temperature sensor 17b is lower than the room temperature set value TS1 (cooling set value), as shown in FIG. 2 is maintained at 0%, and also when the room temperature TRb detected by the temperature sensor 17b becomes lower than the room temperature set value TS2 (heating set value), as shown in FIG. Is maintained at 0%. Therefore, even if the room air is flowing to the fan coil unit 10b by the fan 12b, the room air is not cooled, and the room air near the fan coil unit 10b can be prevented from being excessively cooled. When any one of the fan coil units 10 is stopped, the operation mode of the controller 18 is set by the temperature sensor 17 of the fan coil unit 10 that is operating without calculating the average value. The shut-off valves 31 to 34 are switched.

  In the second method, the detected temperature of one of the two fan coil units 10a and 10b is preferentially used. The temperature sensor 17 to be used preferentially is one specific temperature sensor 17. For example, when priority is given to the room temperature TRa detected by the temperature sensor 17a of the fan coil unit 10a, the temperature sensor 17a becomes a specific temperature sensor, regardless of the room temperature TRb detected by the temperature sensor 17b of the fan coil unit 10b. The operation modes of the controllers 18a and 18b are set and the shut-off valves 31 to 34 are switched according to the room temperature TRa. In this case, when the fan coil unit 10a is stopped, the operation mode of the controller 18 is set by the temperature sensor 17 of the operating fan coil unit 10 and the respective shut-off valves 31 are set as described above. -34 is switched.

  Although the case of the cooling operation has been described above, the same applies to the case of the heating operation, and the operation when the room temperature TR changes is the same as the operation described above with reference to FIGS.

  In the air conditioning system 200 of the embodiment described above, the heating medium feeding pipe 22, the heating medium return pipe 23, the cooling medium feeding pipe 26, the cooling medium return pipe 27, and the first cutoff are provided for the two fan coil units 10a and 10b. When the valve 31 to the fourth shutoff valve 34 have a common configuration and the indoor temperatures TRa and TRb detected by the temperature sensors 17a and 17b vary, an average value TRm of the indoor temperatures TRa and TRb or a specific one In accordance with the room temperature TR detected by the two temperature sensors 17, all the operations of the controllers 18a and 18b are changed to the cooling mode or the heating mode, and the first shut-off valve 31 to the fourth shut-off valve 34 are opened and closed to each coil. Since the refrigerant supplied to 11a and 11b is switched between the cooling medium and the heating medium, the heat flowing through the operation mode of each of the container rollers 18a and 18b It is possible to achieve the type of matching body, it is possible to perform cooling, the switching of heating smoothly. Thereby, even when there is a variation in the indoor temperatures TRa and TRb detected by the temperature sensors 17a and 17b, the indoor temperature can be suitably adjusted so as not to cause excessive cooling or excessive heating. As with the air conditioning system 100 described with reference to FIG. 3, the cooling or heating can be performed freely according to the temperature of the room or the zone.

  The configuration and operation of the air conditioning system 200 including the two fan coil units 10a and 10b have been described above with reference to FIG. 4, but the present invention can also be applied to an air conditioning system including three or more fan coil units. . In this case, as described above, when all the indoor temperatures detected by the indoor temperature sensors of the fan coil units are all higher than the indoor temperature set value TS1 (cooling set value), all the controllers are cooled. When all the room temperatures are lower than the room temperature setting value TS2 (heating setting value), all the controllers are operated in the heating mode. If there is a difference between the indoor temperatures detected by the indoor temperature sensors, the average value of the indoor temperatures is calculated, and the average indoor temperature TRm is represented as a representative of the room or zone in which all the fan coil units are arranged. It is possible to set the operation mode of each controller and switch each shut-off valve 31 to 34 as the temperature, and use the temperature detected by any one of the temperature sensors with priority. You may make it perform the setting of the operation mode of each controller, and the switching of each cutoff valve 31-34 based on the detected indoor temperature.

  10, 10a, 10b fan coil unit, 11, 11a, 11b coil, 12, 12a, 12b fan, 13, 13a, 13b control valve, 14, 14a, 14b heat medium supply pipe, 15, 15a, 15b heat medium discharge pipe , 17, 17a, 17b Temperature sensor, 18, 18a, 18b Controller, 20 Heat medium supply device, 21 Boiler, 22 Heat medium feed pipe, 23 Heat medium return pipe, 25 Refrigerator, 26 Cold medium feed pipe, 27 Cool medium Return pipe, 31-34 shutoff valve, 40 control unit, 41 data bus, 100, 200 air conditioning system.

Claims (6)

A coil that exchanges heat with a room air flowing outside by a hot medium having a temperature higher than room air or a cold medium having a temperature lower than room air, and a fan that flows room air to the outside of the coil A control valve that adjusts the flow rate of the heating medium or the low heating medium flowing inside the coil, a heating medium supply pipe that supplies the heating medium or the cooling medium to the coil, and the heating medium from the coil Or a fan coil unit including a heat medium discharge pipe for discharging the cooling medium, a temperature sensor for detecting indoor air temperature, and a controller for operating the control valve in accordance with the indoor air temperature detected by the temperature sensor; ,
A heat medium supply device for supplying the hot medium or the cold medium;
A heating medium feed pipe for sending the heating medium from the heating medium supply apparatus to the heating medium supply pipe; a heating medium return pipe for returning the heating medium from the heating medium discharge pipe to the heating medium supply apparatus; and the heating medium supply A cooling medium feed pipe for sending the cooling medium from the apparatus to the heating medium supply pipe, a cooling medium return pipe for returning the cooling medium from the heating medium discharge pipe to the heating medium supply apparatus,
A first shut-off valve disposed in the heating medium feed pipe;
A second shut-off valve disposed in the heating medium return pipe;
A third shut-off valve disposed in the cooling medium feed pipe;
A fourth shut-off valve disposed in the cooling medium return pipe;
A controller that receives a room temperature information value from the controller and opens and closes the first to fourth shutoff valves;
When the indoor temperature information value is lower than the indoor air temperature set value, the first shutoff valve and the second shutoff valve are opened, the third shutoff valve and the fourth shutoff valve are closed,
When the indoor temperature information value is higher than the indoor air temperature set value, the third shutoff valve and the fourth shutoff valve are opened, and the first shutoff valve and the second shutoff valve are closed. Air conditioning system. The air conditioning system according to claim 1,
The control unit transmits the indoor air temperature set value to the controller,
The controller is
When the indoor temperature detected by the temperature sensor is lower than the indoor air temperature set value received from the control unit, the control valve is operated according to the indoor temperature, and the indoor temperature detected by the temperature sensor is A heating mode in which the control valve is closed when the indoor air temperature set value received from the control unit is higher than the set value;
When the indoor temperature detected by the temperature sensor is higher than the indoor air temperature set value received from the control unit, the control valve is operated according to the indoor temperature, and the indoor temperature detected by the temperature sensor is When it is lower than the indoor air temperature set value received from the control unit, it can be operated in a cooling mode in which the control valve is closed,
The controller is
Opening the first shut-off valve and the second shut-off valve, closing the third shut-off valve and the fourth shut-off valve and operating the controller in the heating mode;
An air conditioning system in which the third cutoff valve and the fourth cutoff valve are opened, the first cutoff valve and the second cutoff valve are closed, and the controller is operated in the cooling mode. The air conditioning system according to claim 1,
Including a plurality of fan coil units,
The control unit receives each room temperature information value from each controller of a plurality of fan coil units,
When all the indoor temperature information values are lower than the indoor air temperature set value, the first shut-off valve and the second shut-off valve are opened, the third shut-off valve, the fourth shut-off valve, Is closed,
When all the indoor temperature information values are higher than the indoor air temperature set value, the third cutoff valve and the fourth cutoff valve are opened, and the first cutoff valve, the second cutoff valve, Air conditioning system The air conditioning system according to claim 1,
Including a plurality of fan coil units,
The control unit receives each room temperature information value from each controller of a plurality of fan coil units,
When the average value of the indoor temperature information values is lower than the indoor air temperature set value, the first cutoff valve and the second cutoff valve are opened, and the third cutoff valve and the fourth cutoff valve are opened. And closed,
When the average value of the indoor temperature information values is higher than the indoor air temperature set value, the third cutoff valve and the fourth cutoff valve are opened, and the first cutoff valve and the second cutoff valve are opened. And air conditioning system The air conditioning system according to claim 1,
Including a plurality of fan coil units,
The control unit receives each room temperature information value from each controller of a plurality of fan coil units,
When a specific one of the indoor temperature information values is lower than the indoor air temperature set value, the first cutoff valve and the second cutoff valve are opened, and the third cutoff valve and the fourth cutoff valve are opened. Close the valve,
When the specific one of the indoor temperature information values is higher than the indoor air temperature set value, the third shutoff valve and the fourth shutoff valve are opened, and the first shutoff valve and the second shutoff valve are opened. Air conditioning system with valve closed The air conditioning system according to any one of claims 3 to 5,
The control unit transmits the indoor air temperature set value to the controllers,
Each controller is
When each room temperature detected by each temperature sensor is lower than the indoor air temperature set value received from the control unit, each control valve is operated according to each room temperature and detected by each temperature sensor. A heating mode in which each control valve is closed when each indoor temperature is higher than the indoor air temperature set value received from the control unit;
When each room temperature detected by each temperature sensor is higher than the indoor air temperature set value received from the control unit, each control valve is operated according to each room temperature and detected by each temperature sensor. When each indoor temperature is lower than the indoor air temperature set value received from the control unit, it can be operated in a cooling mode in which each control valve is closed,
The controller is
Opening the first shut-off valve and the second shut-off valve, closing the third shut-off valve and the fourth shut-off valve and operating all the controllers in the heating mode,
An air conditioning system in which the third cutoff valve and the fourth cutoff valve are opened, the first cutoff valve and the second cutoff valve are closed, and all the controllers are operated in the cooling mode.

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