Air conditioning system

Abstract

To provide an air conditioning system which enables proper air conditioning control according to an air conditioning space to be performed easily and inexpensively.SOLUTION: An air conditioning system 1 includes: a heat source machine 10 which heats or cools a liquid heat medium to circulate the heat medium in a circulation passage 11; a radiation panel 20a which utilizes the heat medium flowing in the circulation passage 11 to perform radiation air-conditioning for an air conditioning space 101; an auxiliary sensible heat treatment device 30 which compensates sensible heat treatment for an air conditioning section 101 by the radiation panel 20a with the heat medium branched from the circulation passage 11; a humidity regulation machine 40 which performs latent heat treatment for the air conditioning space 101; and a control device which controls the sensible heat treatment by the heat radiation panel 20a and the auxiliary sensible heat treatment device 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an air conditioning system. [Background technology]

[0002] For example, the configuration disclosed in Patent Document 1 is known as a system for air-conditioning the indoor space of a building. This radiant air-conditioning system includes a radiant panel and a humidity control ventilation device. The radiant panel controls the surface temperature of the panel body to a predetermined temperature by adjusting the flow rate of the heat medium supplied to the panel body. The humidity control ventilation device controls the indoor temperature and humidity by exchanging heat between the introduced outside air and cold water in the humidity control unit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2009 / 044855 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional radiant air conditioning system, the heat medium supplied to the radiant panel and the cold water supplied to the humidity control ventilation device are different from each other, and during cooling, a heat medium at 20°C is supplied to the radiant panel, while cold water at 7°C is supplied to the humidity control ventilation device.

[0005] However, it is difficult to produce chilled water at 7°C using a water-refrigerant refrigeration cycle. For this reason, the conventional radiant air-conditioning system described above uses two compressors, which can easily make the radiant air-conditioning system configuration complicated.

[0006] Therefore, an object of the present invention is to provide an air conditioning system that can easily and inexpensively achieve appropriate air conditioning control according to the air-conditioned space. [Means for solving the problem]

[0007] The above-mentioned object of the present invention is achieved by an air conditioning system comprising a heat source machine that heats or cools a liquid heat medium and circulates it through a circulation flow path, a radiant panel that performs radiant air conditioning of the air-conditioned space using the heat medium flowing through the circulation flow path, an auxiliary sensible heat treatment device that supplements the sensible heat treatment of the air-conditioned section by the radiant panel using the heat medium diverted from the circulation flow path, a humidistat that performs latent heat treatment of the air-conditioned space, and a control device that controls the sensible heat treatment by the radiant panel and the auxiliary sensible heat treatment device.

[0008] In this air conditioning system, it is preferable that the control device includes a heat source control unit that controls the operation of the heat source unit, a first sensible heat treatment control unit that controls sensible heat treatment by the radiant panel, a second sensible heat treatment control unit that controls sensible heat treatment by the auxiliary sensible heat treatment device, a latent heat treatment control unit that controls latent heat treatment by the humidistat, and a centralized control unit that centrally controls the heat source control unit, first sensible heat treatment control unit, second sensible heat treatment control unit, and latent heat treatment control unit.

[0009] The control unit can control a flow rate adjustment unit that adjusts the supply flow rate of the heat medium supplied to the radiant panel through the circulation flow path based on the detection of the surface temperature of the radiant panel and the dew point temperature of the air-conditioned space. The flow rate adjustment unit can adjust the supply flow rate of the heat medium to the radiant panel by bypassing a portion of the heat medium supplied to the radiant panel through the circulation flow path.

[0010] It is possible to further provide a second circulation flow path through which a heat medium passes that can exchange heat with the heat medium circulating in the circulation flow path, and the heat medium flowing in the second circulation flow path can be configured to be supplied to the radiant panel.

[0011] The auxiliary sensible heat treatment device may comprise a fan coil unit or a tilt beam.

[0012] The radiant panel and the auxiliary sensible heat treatment device preferably condition the conditioned section of the same room. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide an air conditioning system that can easily and inexpensively achieve appropriate air conditioning control according to the air-conditioned space. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic configuration diagram of an air conditioning system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing a configuration for remotely monitoring the air conditioning system shown in FIG. [Figure 3] FIG. 10 is a schematic configuration diagram of an air conditioning system according to another embodiment of the present invention. [Figure 4] FIG. 3 is a block diagram showing a modified example of FIG. 2. [Figure 5] FIG. 10 is a schematic configuration diagram of an air conditioning system according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the present invention will be described below with reference to the accompanying drawings. Fig. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention. As shown in Fig. 1, the air conditioning system 1 includes a heat source unit 10, radiant panels 20a and 20b, an auxiliary sensible heat treatment device 30, and a humidistat 40 as main components.

[0016] The heat source unit 10 is, for example, an air-cooled chiller, and is placed outside the building 100. It generates heat source water of the desired temperature by heating or cooling a liquid heat medium, and circulates the water through the circulation path 11 by operating the pump 14.

[0017] The radiant panels 20a, 20b perform radiant air-conditioning of the air-conditioned space 101 in the building 100 where a person M resides, using the heat medium circulated between the radiant panels 20a, 20b and the heat source unit 10 through the circulation flow path 11 by the operation of the pump 14. In this embodiment, two radiant panels 20a, 20b are installed on the ceiling surface, and the heat medium is supplied in parallel to each radiant panel 20a, 20b from the circulation flow path 11. The number of radiant panels 20a, 20b is not particularly limited and may be one or three or more. Furthermore, the radiant panels 20a, 20b may be installed on the floor, wall, or other surface in addition to the ceiling. In the case of a multi-story building 100, the radiant panels 20a, 20b installed on the ceiling surface also contribute to the air-conditioning of the upper floors, thereby enabling efficient air-conditioning of the entire building. The circulation flow path 11 passes through a non-air-conditioned space 102, such as the attic, within the building 100 and is connected to the radiant panels 20a, 20b.

[0018] The auxiliary sensible heat treatment device 30 utilizes the heat medium diverted from the circulation path 11 via the branch path 15 to perform sensible heat treatment in the air-conditioned space 101, which is the same room as the radiant panels 20a and 20b, using an air-conditioning method other than radiant air conditioning. This complements the sensible heat treatment in the air-conditioned space 101 by the radiant panels 20a and 20b. In this embodiment, the auxiliary sensible heat treatment device 30 is a fan coil unit installed on the ceiling. It uses a fan to draw air from the air-conditioned space 101, exchanges heat with the heat medium, and then blows the air into the perimeter zone of the air-conditioned space 101. The auxiliary sensible heat treatment device 30 may be an air conditioner other than a fan coil unit, and the number of such air conditioners is not particularly limited. The auxiliary sensible heat treatment device 30 may be, for example, a tilt beam installed on the ceiling. It can draw air from the air-conditioned space 101 using conditioned air, exchange heat with the heat medium, and then blow the air into the perimeter zone. A flow control valve 12a is provided in the branch path 15.

[0019] Humidity controller 40 is, for example, a desiccant type, and operates a fan to take in outside air OA from outdoors into air-conditioned space 101, dehumidifying or humidifying it with a desiccant, and then discharging the air in air-conditioned space 101 to the outdoors as exhaust air EA, thereby treating the latent heat of air-conditioned space 101. Humidity controller 40 may be of a coil type or other type in addition to the desiccant type, and the number of units is not particularly limited.

[0020] The radiant panels 20a, 20b further include surface temperature sensors 21a, 21b that measure the surface temperatures of the respective panels, a flow rate adjuster 23 that adjusts the flow rate of the heat medium supplied to each of the radiant panels 20a, 20b, and a temperature and humidity sensor 24 that detects the temperature, humidity, dew point temperature, etc. within the air-conditioned space 101. The flow rate adjuster 23 includes bypass flow paths 16a, 16b that bypass a portion of the heat medium supplied to each of the radiant panels 20a, 20b by the circulation flow path 11, and the flow rate of the heat medium supplied to each of the radiant panels 20a, 20b can be adjusted by operating the three-way valves 22a, 22b.

[0021] Fig. 2 is a block diagram showing a configuration for remotely monitoring air conditioning system 1. As shown in Fig. 1 and Fig. 2, air conditioning system 1 further includes control device 50 that controls sensible heat treatment by radiant panels 20a, 20b and auxiliary sensible heat treatment device 30 based on detection by temperature and humidity sensor 24.

[0022] The control device 50 includes a heat source control unit 51 that controls the operation of the heat source unit 10, a first sensible heat treatment control unit 52 that controls sensible heat treatment by the radiant panels 20a and 20b, a second sensible heat treatment control unit 53 that controls sensible heat treatment by the auxiliary sensible heat treatment device 30, a latent heat treatment control unit 54 that controls latent heat treatment by the humidistat 40, and a centralized control unit 55 that centrally controls the heat source control unit 51, the first sensible heat treatment control unit 52, the second sensible heat treatment control unit 53, and the latent heat treatment control unit 54.

[0023] The heat source control unit 51 controls the discharge temperature of the heat source water generated by the heat source unit 10 and the discharge flow rate due to the operation of the pump 14. The first sensible heat treatment control unit 52 controls the sensible heat treatment by the radiant panels 20a, 20b by operating the three-way valves 22a, 22b of the flow rate adjustment unit 23 to control the supply flow rate to the radiant panels 20a, 20b based on the surface temperatures of the radiant panels 20a, 20b detected by the surface temperature sensors 21a, 21b and the temperature and humidity sensor 24 and the dew point temperature of the air-conditioned space 101. The second sensible heat treatment control unit 53 controls the sensible heat treatment by the auxiliary sensible heat treatment unit 30 by controlling the flow rate of the heat medium supplied to the auxiliary sensible heat treatment unit 30 and the air volume of the fan. The latent heat treatment control unit 54 controls the latent heat treatment by the humidistat 40 by controlling the operation of the fan of the humidistat 40. These heat source control unit 51, first sensible heat process control unit 52, second sensible heat process control unit 53, and latent heat process control unit 54 can be configured as a remote control type that can be controlled by wireless communication, for example.

[0024] Centralized control unit 55 is capable of centrally controlling heat source control unit 51, first sensible heat treatment control unit 52, second sensible heat treatment control unit 53, and latent heat treatment control unit 54, and centrally manages heat source unit 10, radiant panels 20a and 20b, auxiliary sensible heat treatment device 30, and humidistat 40. For example, when an operation signal for heat source unit 10 is sent from heat source control unit 51 to centralized control unit 55, first sensible heat treatment control unit 52 controls sensible heat treatment by radiant panels 20a and 20b.

[0025] As shown in Figure 2, the control device 50 is connected to a monitoring server 4 via a communication device 2 and a network 3 such as the Internet, and the status of the heat source unit 10, flow rate adjustment unit 23, auxiliary sensible heat treatment device 30, humidistat 40, pump 14, flow rate adjustment valve 12a, etc. is transmitted in real time from the control unit 50 to the monitoring server 4, thereby enabling the monitoring server 4 to perform equipment linkage, fault diagnosis, data management, etc. of the air conditioning system 1.

[0026] In air conditioning system 1 having the above configuration, the heat medium used in radiant panels 20a, 20b and the heat medium used in auxiliary sensible heat treatment device 30 are supplied in parallel from the same heat source machine 10, so heat medium of approximately the same temperature is supplied to radiant panels 20a, 20b and auxiliary sensible heat treatment device 30. Generally, during cooling, the temperature of the heat medium supplied to the radiant panels is approximately 16°C, while the temperature of the heat medium supplied to the fan coil unit is approximately 7°C. Therefore, if the temperature of the heat medium is matched to that of radiant panels 20a, 20b, the sensible heat treatment capacity of auxiliary sensible heat treatment device 30 decreases, but the present invention prioritizes easy and inexpensive air conditioning control over this disadvantage.

[0027] That is, according to the present invention, when sensible heat load treatment is shared between radiant panels 20a, 20b and auxiliary sensible heat treatment device 30, the load treatment of each can be easily controlled, making it possible to easily select radiant panels 20a, 20b and auxiliary sensible heat treatment device 30 and to easily control the coordination of sensible heat load treatment, thereby easily and inexpensively achieving appropriate air conditioning control according to air-conditioned space 101. Note that a decrease in the sensible heat treatment capacity of auxiliary sensible heat treatment device 30 according to the present invention can be addressed by increasing the size of auxiliary sensible heat treatment device 30 or the number of installed units, etc.

[0028] It is preferable to set the temperature of the heat medium supplied from the heat source unit 10 within a temperature range in which both the radiant panels 20a, 20b and the auxiliary sensible heat treatment device 30 can perform appropriate sensible heat load treatment, and the number of radiant panels 20a, 20b and the auxiliary sensible heat treatment device 30 required for the air-conditioned space 101 can be determined taking into account the processing capacity of the radiant panels 20a, 20b and the auxiliary sensible heat treatment device 30 within that temperature range.

[0029] Furthermore, air conditioning system 1 is configured so that centralized control unit 55 centrally controls heat source control unit 51, first sensible heat process control unit 52, second sensible heat process control unit 53, and latent heat process control unit 54, so that air conditioning system 1 of the present invention can be quickly and easily configured using an existing air conditioning system. For example, when building a new air conditioning system that combines the "Intelligent Touch Manager," an air conditioning control system from Daikin Industries, Ltd., with a radiant panel, the system can be configured so that the sensible heat process of radiant panels 20a, 20b is controlled by first sensible heat process control unit 52 using the centralized control unit provided in the existing air conditioning control system.

[0030] Figure 3 is a schematic configuration diagram of an air conditioning system according to another embodiment of the present invention. The air conditioning system 1 shown in Figure 3 is the same as the air conditioning system 1 shown in Figure 1, but further includes a second circulation flow path 17 through which a heat medium passes that can exchange heat with the heat medium circulating through the circulation flow path 11 using a heat exchanger 70, and is configured so that the heat medium flowing through the second circulation flow path 17 is supplied to radiant panels 20a, 20b. In Figure 3, components that are the same as those in Figure 1 are designated by the same reference numerals, and repeated explanations will be omitted.

[0031] 3, the second circulation flow path 17 is provided with a tank 71 accommodating a pump 72, and operation of the pump 72 causes the heat medium to circulate between the heat exchanger 70 and the radiant panels 20a, 20b. The temperature of the heat medium after flowing through the second circulation flow path 17 and passing through the heat exchanger 70 is detected by a temperature sensor 73. The tank 71 functions as a buffer for the heat medium circulated through the second circulation flow path 17, but a configuration may also be provided with only the pump 72 without the tank 71.

[0032] The circulation flow path 11 circulates the heat medium between the heat exchanger 70 and the heat source 10 by operation of a pump 14. A bypass flow path 18 is provided in the circulation flow path 11, and the heat medium supplied from the heat source 10 to the heat exchanger 70 can be bypassed to the bypass flow path 18 by operation of a three-way valve 74.

[0033] 3 controls the operation of three-way valve 74 based on the detection of temperature sensor 73, so that the heat medium flowing through circulation flow path 11 can be supplied to heat exchanger 70 only when necessary to exchange heat with the heat medium supplied to radiant panels 20a, 20b. Therefore, during cooling, the temperature supplied to radiant panels 20a, 20b can be maintained at a desired temperature (e.g., 16°C), while the temperature of the heat medium supplied to auxiliary sensible heat treatment device 30 can be maintained at a lower desired temperature (e.g., 7°C). In this way, the temperature of the heat medium supplied to radiant panels 20a, 20b and the temperature of the heat medium supplied to auxiliary sensible heat treatment device 30 can be set individually to desired temperatures, thereby improving air conditioning efficiency.

[0034] 2, the air conditioning system 1 shown in Fig. 3 can be configured such that the control device 50 has the heat source control unit 51, the first sensible heat treatment control unit 52, the second sensible heat treatment control unit 53, and the latent heat treatment control unit 54 centrally controlled by the centralized control unit 55. On the other hand, in cases where the entire air conditioning system 1 of each of the above embodiments is constructed from scratch, it can also be configured such that the control device 50 comprehensively controls the operation of the heat source unit 10, the sensible heat treatment by the radiant panels 20a and 20b, the sensible heat treatment by the auxiliary sensible heat treatment device 30, and the latent heat treatment by the humidistat 40, as shown in Fig. 4.

[0035] 3 may be configured, like the heat exchanger 70 of the air conditioning system 1 shown in Fig. 5, so that the heat medium circulated from the heat source unit 10 through the circulation flow path 11 is bypassed to the heat exchange bypass flow paths 18a, 18b, and the heat medium flowing through the heat exchange bypass flow paths 18a, 18b exchanges heat with the heat medium. In Fig. 5, the same components as in Fig. 3 are designated by the same reference numerals, and repeated explanations will be omitted.

[0036] 5, by closing on-off valves 19a and 19d and opening on-off valves 19b, 19c, and 19e, the heat medium passes through heat exchange bypass flow paths 18a and 18b, and heat exchange occurs in heat exchanger 70. The heat medium after heat exchange that is discharged from heat exchange bypass flow path 18a passes through tank 71 equipped with pump 72 and is returned to heat source unit 10. Meanwhile, the heat medium after heat exchange that is discharged from heat exchange bypass flow path 18b is supplied to radiant panels 20a and 20b and auxiliary sensible heat treatment device 30. Three-way valve 74 is controlled so that the temperature of the heat medium supplied to radiant panels 20a and 20b and auxiliary sensible heat treatment device 30 becomes a set temperature.

[0037] When the heat exchanger 70 is not used, the on-off valves 19c and 17e are closed and the on-off valves 17a, 17b, and 17d are opened so that the heat medium does not flow through the heat exchanger 70, and the air conditioning system 1 shown in FIG. 5 can be operated in the same manner as the air conditioning system 1 shown in FIG. 1. [Explanation of symbols]

[0038] 1. Air conditioning system 10 Heat source machine 11 Circulation flow path 15 Branch channel 16a, 16b Bypass flow path 20a, 20b Radiation panels 21a, 21b Surface temperature sensor 23 Flow rate adjustment section 30 Auxiliary sensible heat treatment device 40 Humidity Controller 50 Control device 70 Heat exchanger 101 Air-conditioned space

Claims

1. a heat source machine that heats or cools a liquid heat medium and circulates it through a circulation flow path; a radiant panel that performs radiant air conditioning of the air-conditioned space by utilizing the heat medium flowing through the circulation flow path; an auxiliary sensible heat treatment device that supplements the sensible heat treatment of the air-conditioning section by the radiant panel with a heat medium diverted from the circulation flow path; a humidistat that performs latent heat treatment in the air-conditioned space; An air conditioning system comprising the radiant panel and a control device for controlling sensible heat treatment by the auxiliary sensible heat treatment device.

2. The air conditioning system described in claim 1, wherein the control device comprises a heat source control unit that controls the operation of the heat source unit, a first sensible heat treatment control unit that controls sensible heat treatment by the radiant panel, a second sensible heat treatment control unit that controls sensible heat treatment by the auxiliary sensible heat treatment device, a latent heat treatment control unit that controls latent heat treatment by the humidistat, and a centralized control unit that centrally controls the heat source control unit, first sensible heat treatment control unit, second sensible heat treatment control unit and latent heat treatment control unit.

3. The air conditioning system according to claim 1, wherein the control unit controls a flow rate adjustment unit that adjusts the supply flow rate of the heat medium supplied to the radiant panel through the circulation flow path based on detection of the surface temperature of the radiant panel and the dew point temperature of the air-conditioned space.

4. The air conditioning system according to claim 3 , wherein the flow rate adjusting unit adjusts the flow rate of the heat medium supplied to the radiant panel by bypassing a portion of the heat medium supplied to the radiant panel by the circulation flow path.

5. Further provided is a second circulation flow path through which a heat medium passes that can exchange heat with the heat medium circulating in the circulation flow path, The air conditioning system according to claim 1 , wherein the heat medium flowing through the second circulation flow path is supplied to the radiant panel.

6. The air conditioning system of claim 1 , wherein the auxiliary sensible heat treatment device comprises a fan coil unit or a tilt beam.

7. The air conditioning system according to claim 1 , wherein the radiant panel and the auxiliary sensible heat treatment device air condition the air-conditioned section of the same room.

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