Radiant air conditioning system

Abstract

To provide a radiation air-conditioning system capable of improving thermal comfort in a space while suppressing generation of due condensation on a radiation panel surface.SOLUTION: A radiation air-conditioning system 100 includes: a blowing device 11 provided with a plurality of blowout nozzles 13 each having a blowout slit 22; a radiation heat generating device 31 having a plurality of cold / hot water radiation pipes 32 generating heat radiation in an air-conditioned space 1; and a control device 51 controlling an operation action. The plurality of blowout nozzles 13 are arranged in parallel with a gap so that the blowout slit 22 is located on the same plane. Each of the plurality of cold / hot water radiation pipes 32 is disposed in the gap between the adjacent blowout nozzles 13, and also is disposed on an air duct through which induction air induced by the blowout air blown through the blowing device 11 passes. The control device 51 performs control to execute the operation action of the radiation heat generating device 31 when the humidity in the air-conditioned space 1 is lower than a first reference humidity, and stop the operation action of the radiation heat generating device 31 when the humidity is the first reference humidity or higher.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a radiant air conditioning system that uses radiant heat from water to air condition a room. [Background technology]

[0002] BACKGROUND ART Known prior art is a radiant air-conditioning system that uses a radiant panel in which a number of pipes through which a heat transfer medium such as hot or cold water flows are embedded and that conditions the room or the like by thermal radiation (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-19533 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional radiant air conditioning systems, convective heat transfer by air circulating within a space is almost nonexistent, making it impossible to utilize objects that generate cooling heat to cool the space and thus failing to improve comfort. Meanwhile, conventional radiant air conditioning systems have the problem that condensation occurs on the surface of the radiant panel when cooling is performed using the radiant panel when the humidity in the space is high. The present invention aims to solve the above-mentioned conventional problems and to provide a radiant air conditioning system that can improve the thermal comfort of a space while suppressing the occurrence of condensation on the surface of the radiant panel. [Means for solving the problem]

[0005] The radiant air-conditioning system of the present invention comprises a blower having a plurality of blow-out nozzles with slit-shaped outlets and a blower for blowing air to the blow-out nozzles, a radiant heat generating device having a plurality of pipes for generating thermal radiation in a space to be air-conditioned, and a control device for controlling the operation of the radiant heat generating device. The plurality of blow-out nozzles are arranged side by side with gaps between them so that their respective outlets are located on the same plane, and each of the plurality of pipes is located in the gap between adjacent blow-out nozzles and in an air path through which induced air flows that is drawn by the blown air blown from the blower. The control device is characterized by controlling the radiant heat generating device to operate when the humidity in the space to be air-conditioned is less than a first reference humidity and to stop the operation of the radiant heat generating device when the humidity in the space to be air-conditioned is equal to or greater than the first reference humidity, thereby achieving the desired object. [Effects of the Invention]

[0006] According to the present invention, it is possible to provide a radiant air-conditioning system that can improve the thermal comfort of a space while suppressing the occurrence of condensation on the surface of the radiant panel. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing the basic configuration of a radiant air-conditioning system according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a side view showing the overall layout of the radiant air-conditioning system. [Figure 3] FIG. 3 is a layout diagram showing an image of the installation of a blower in a radiant air-conditioning system. [Figure 4] FIG. 4 is a connection schematic diagram showing the connection relationship between the cold / hot water pipe of the radiant heat generating device and the cold / hot water generating device in the radiant air-conditioning system. [Figure 5] FIG. 5 is a configuration diagram showing the relative positions of the blow nozzles of the air blowing device and the cold and hot water pipes of the radiant heat generating device that constitute the radiant air conditioning system. [Figure 6] FIG. 6 is a top view showing the direction of air flow within the blower. [Figure 7] FIG. 7 is a cross-sectional view showing the flow direction of the air blown from the blowing nozzle of the blower and the induced air generated near the hot and cold water pipe. [Figure 8] FIG. 8 is a schematic functional block diagram of the control device. [Figure 9] FIG. 9 is a flowchart showing the basic processing operation of the control device regarding dehumidification control. [Figure 10] FIG. 10 is a flowchart showing the basic processing operation of the control device regarding the chilled water temperature control. DETAILED DESCRIPTION OF THE INVENTION

[0008] The radiant air-conditioning system according to the present invention comprises a blower having a plurality of blow-out nozzles with slit-shaped outlets and a blower for blowing air to the blow-out nozzles, a radiant heat generating device having a plurality of pipes for generating thermal radiation in a space to be air-conditioned, and a control device for controlling the operation of the radiant heat generating device. The plurality of blow-out nozzles are arranged side by side with gaps between them so that their respective outlets are located on the same plane, and each of the plurality of pipes is located in the gaps between adjacent blow-out nozzles and in an air path through which induced air passes, which is drawn by the blown air blown from the blower. The control device controls the radiant heat generating device to operate when the humidity in the space to be air-conditioned is less than a first reference humidity, and to stop the operation of the radiant heat generating device when the humidity in the space to be air-conditioned is equal to or greater than the first reference humidity.

[0009] With this configuration, when the humidity of the air in the conditioned space (the induced air drawn into the gaps between the blow-out nozzles) is less than the first reference humidity and the air in the conditioned space is sufficiently dehumidified, the air in the conditioned space exchanges heat with the pipe surfaces and combines with the air blown out from the blow-out nozzles, resulting in a gentle, planar, uniform flow being blown into the conditioned space. On the other hand, when the humidity of the air in the conditioned space is equal to or greater than the first reference humidity and the air in the conditioned space is not sufficiently dehumidified and the humidity is high, the radiant heat generating device is stopped and the air is blown into the conditioned space as a gentle, planar, uniform flow. This allows for air conditioning within a range that does not cause condensation on the pipe surfaces, while minimizing temperature bias and the feeling of a draft. In other words, this radiant air-conditioning system can improve the thermal comfort of the conditioned space while minimizing condensation on the pipe surfaces (the radiant panel surfaces).

[0010] In addition, in the radiant air-conditioning system according to the present invention, the humidity of the air-conditioned space is detected by a humidity sensor installed on an air path through which induced air passes upstream of the plurality of pipes, and the control device humidity The operation of the radiant heat generating device may be controlled based on the detected humidity of the air in the air-conditioned space (the induced air drawn into the gaps in the blow-out nozzles) flowing through the pipe surface that is most likely to cause condensation in the air-conditioned space. This makes it possible to enjoy the effect of suppressing condensation by controlling the operation of the radiant heat generating device with greater precision.

[0011] The radiant air-conditioning system according to the present invention further includes a dehumidifier that dehumidifies the air in the conditioned space. The control device may be configured to operate the dehumidifier when the absolute humidity of the conditioned space is equal to or higher than a target absolute humidity calculated from the target temperature and humidity of the conditioned space, and to stop the operation of the dehumidifier when the absolute humidity is below the target absolute humidity. In this manner, regardless of the temperature state of the conditioned space, the dehumidifier continues to perform dehumidification control until the absolute humidity reaches the dehumidification target value. This allows sufficient dehumidification without cooling the conditioned space, further enhancing the effect of suppressing condensation.

[0012] Furthermore, in the radiant air-conditioning system according to the present invention, the multiple pipes may generate radiant heat for the conditioned space by supplying cold or hot water generated by a cold or hot water chiller to the inside of the pipes. In this way, by sending cold or hot water whose temperature has been adjusted in advance by the cold or hot water chiller to the pipes, it becomes possible to continuously generate heat. This makes it easy to improve the thermal comfort of the space.

[0013] In addition, in the radiant air-conditioning system according to the present invention, the control device may control the chiller so that the temperature of the chilled or hot water is higher than the dew point temperature of the space to be conditioned. In this way, the temperature of the pipe surface, which is most likely to cause condensation in the space to be conditioned, is controlled to a temperature range that does not cause condensation. This makes it possible to reliably suppress condensation caused by controlling the operation of the radiant heat generating device.

[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following embodiments are examples of specific embodiments of the present invention and do not limit the technical scope of the present invention. Furthermore, each drawing used in the embodiments is a schematic drawing, and the ratios of the sizes and thicknesses of the components in each drawing do not necessarily reflect the actual dimensional ratios.

[0015] (Embodiment 1) First, a radiant air-conditioning system 100 according to the first embodiment will be described with reference to Figures 1 and 2. Figure 1 is a perspective view showing the basic configuration of the radiant air-conditioning system 100 according to the first embodiment of the present invention. Figure 2 is a side view showing the overall layout of the radiant air-conditioning system 100. Note that Figures 1 and 2 only show the main devices and representative configurations that make up the system, and the detailed configuration of each device will be described later with reference to Figure 3 onwards.

[0016] The radiant air conditioning system 100 is a system that plays a role in improving the thermal environment of the living space (air-conditioned space 1) through a combination of air flow, heat exchange, dehumidification, and thermal radiation, that is, in improving the thermal comfort of the living space.

[0017] Specifically, as shown in Fig. 1, the radiant air-conditioning system 100 includes a blower 11, a radiant heat generator 31, a dehumidifier 41, and a control device 51 (see Fig. 8). The blower 11 includes blowing nozzles 13a, 13b, 13c, and 13d collectively referred to as blowing nozzles 13, a blower box 14, a blower 15 (see Fig. 2), and blowing slits 22a, 22b, 22c, and 22d collectively referred to as blowing slits 22. The radiant heat generator 31 includes cold and hot water radiant pipes 32a, 32b, and 32c collectively referred to as cold and hot water radiant pipes 32, a water supply pipe 33, a drain pipe 34, a cold and hot water generating chiller 35, and a water pump 36. As shown in Fig. 2, the dehumidifying device 41 is configured to include a dehumidifier 42 and a conveying fan 43. Also, as shown in Fig. 1, a temperature sensor 52, a humidity sensor 53, a remote control 54, and a display panel 55 are provided inside the conditioned space 1, and are configured to be able to communicate with the control device 51.

[0018] The radiant air-conditioning system 100 is installed in the conditioned space 1, which is part of a house. Here, the conditioned space 1 refers to the space used by residents as a place to live inside, and includes the living room, dining room, bedroom, private room, or children's room. It does not include spaces where residents do not engage in activities inside, such as closets, cupboards, or mechanical rooms. The conditioned space 1 is an enclosed space made up of walls including a ceiling, floor, and side walls, but in Figure 1, the side walls and ceiling on the foreground of the drawing are shown as transparent to make it easier to see the arrangement of the radiant air-conditioning system 100 installed inside the conditioned space 1. The components of the blower device 11, namely the blower box 14, the blowing nozzle 13 (blowout nozzles 13a, 13b, 13c, 13d), the cold / hot water radiation pipe 32 (cold / hot water radiation pipes 32a, 32b, 32c) of the radiant heat generating device 31, and the dehumidifier 41, are each arranged near the ceiling surface of the air-conditioned space 1.

[0019] The blower box 14 is a frame that houses all the equipment and air ducts required to take in circulating air from the air-conditioned space 1 and blow it to the blow-out nozzles 13 (blow-out nozzles 13a, 13b, 13c, and 13d). A number of components, including a blower 15, are installed inside the blower box 14, as will be described in detail later. The blower box 14 is arranged in the air-conditioned space 1 so as to be in contact with the ceiling surface and the rear side wall surface. In this embodiment, the blower box 14 is arranged so as to be in contact with the ceiling surface and the rear side wall surface, but it does not necessarily have to be in contact with the inside of the air-conditioned space 1; for example, it may be hung from the ceiling surface or built into a drop ceiling section in the room.

[0020] The blowout nozzles 13 (blowout nozzles 13a, 13b, 13c, 13d) serve to blow air blown from the blowers 15 (blowers 15a, 15b) into the air-conditioned space 1, and are substantially rectangular parallelepiped members having blowout slits 22 (blowout slits 22a, 22b, 22c, 22c). In this embodiment, the blowout nozzles 13a, 13b, 13c, 13d all have the same shape. As shown in FIG. 1, one of the two smallest cross-sectional areas of the six faces of each of the blowout nozzles 13a, 13b, 13c, 13d is in contact with the blower box 14, and the blowout nozzles 13 (blowout nozzles 13a, 13b, 13c, 13d) and the blower box 14 are in communication with each other via holes through which air passes. Furthermore, the other of the two faces with the smallest cross-sectional areas among the six faces is in contact with the side wall surface of the air-conditioned space 1 (the side wall surface opposite the back side wall surface that is in contact with the fan box 14). Furthermore, the remaining four faces excluding the two faces with the smallest cross-sectional areas are not in contact with the fan box 14, the ceiling surface of the air-conditioned space 1, or adjacent blow-out nozzles 13 (for example, blow-out nozzles 13a and 13b), and are installed in a state where air occupying the air-conditioned space 1 can pass around the blow-out nozzles 13. In this embodiment, the space through which air passes around the blow-out nozzles 13 that are connected to the air-conditioned space 1 is defined as induction space 2. Furthermore, blow-out slits 22a, 22b, 22c, and 22d are all located on the same plane that is approximately parallel to the ceiling surface. In other words, the blowout nozzles 13a, 13b, 13c, and 13d are arranged side by side with gaps between them so that the blowout slits 22 sides are positioned on the same plane.

[0021] The detailed arrangement of other elements constituting the air blower will be described later with reference to FIGS.

[0022] The cold / hot water radiation pipes 32 (chilled / hot water radiation pipes 32a, 32b, 32c) are hollow members for changing the temperature of the air occupying the air-conditioned space 1 or for generating thermal radiation between the wall surfaces that make up the air-conditioned space 1 and objects (furniture, human bodies, etc.) present inside, and are configured to allow water to pass through their interiors. The cold / hot water radiation pipes 32 (chilled / hot water radiation pipes 32a, 32b, 32c) are each made of the same material, and it is preferable to use a material with a high emissivity, such as resin, for the surface in particular, although other materials can be used instead.

[0023] The hot and cold water generating chiller 35 is a device for generating water to generate air conditioning and thermal radiation for the conditioned space 1, and is equipped with an internal mechanism for heating and cooling water, a tank for storing water for heating and cooling, and a mechanism for controlling the water temperature. The hot and cold water generating chiller 35 corresponds to the "hot and cold water chiller" in the claims.

[0024] The water supply pipe 33 is a pipe for sending water whose temperature has been adjusted by the cold / hot water generating chiller 35 to the cold / hot water radiation pipe 32. The water supply pipe 33 is connected to the cold / hot water generating chiller 35, the water pump 36, and the cold / hot water radiation pipe 32 in this order from the upstream side.

[0025] The drain pipe 34 is a pipe for returning water that has circulated through the chilled / hot water radiation pipe 32 to the chilled / hot water generating chiller 35. The drain pipe 34 is connected to the chilled / hot water radiation pipe 32 and the chilled / hot water generating chiller 35 in this order from the upstream side. In this embodiment, the water supply pipe 33, the drain pipe 34, the chilled / hot water generating chiller 35, and the water pump 36 are arranged inside the air-conditioned space 1, but they may also be arranged outside the air-conditioned space 1 beyond the constituent ceiling, floor, and side wall surfaces, and may be arranged in any position that does not interfere with the living space without affecting the operation and effects of the present invention.

[0026] Details of the radiant heat generating device 31, such as details of the connection relationship with the cold / hot water radiant pipe 32, the water supply pipe 33, and the drain pipe 34, will be described later with reference to FIG.

[0027] The dehumidifier 41 is a device for dehumidifying the air in the air-conditioned space 1. The dehumidifier 41 is configured to include a dehumidifier 42 and a conveying fan 43 inside a housing. As shown in FIG. 2, the dehumidifier 41 is installed in the attic space 3, which is outside the air-conditioned space 1, and is connected to a dehumidifier outlet 44 via an outlet duct 46 and to a dehumidifier inlet 45 via an inlet duct 47. The dehumidifier 41 takes in air from the air-conditioned space 1 through the dehumidifier inlet 45, dehumidifies it using the dehumidifier 42, and then releases the dehumidified air from the dehumidifier outlet 44 into the air-conditioned space 1. This series of air flows is generated by driving the conveying fan 43. The air path caused by the dehumidifier 41 and the air path caused by the air blower 11 are independent of each other.

[0028] The dehumidifier 42 is a component that dehumidifies the air taken in from the conditioned space 1 by cooling it and causing condensation. The dehumidifier 42 is equipped with a cooler and a radiator inside, and after cooling and condensing the taken-in air, it returns the processed heat to the air and releases it as dry air, i.e., dehumidified air with a low relative humidity. Note that in this embodiment, a dehumidifier using a cooling dehumidification method or a so-called compressor method is used, but the use of a desiccant method dehumidifier does not affect the functions and effects of the present invention.

[0029] Conveying fan 43 is a fan for circulating air inside the housing, and is arranged upstream of dehumidifier 42 in the air path inside the housing. When conveying fan 43 operates, it generates an air flow from dehumidifier inlet 45 to dehumidifier outlet 44. This allows dehumidifier 41 to take in air from conditioned space 1 through dehumidifier inlet 45 and blow out dehumidified air from dehumidifier outlet 44.

[0030] Dehumidifier outlet 44 is an opening that sends out air that has passed through dehumidifier 42 and been dehumidified into air-conditioned space 1. Dehumidifier outlet 44 is installed at any position on the ceiling surface of air-conditioned space 1, and is positioned so that the air blown out from dehumidifier outlet 44 is blown toward the floor surface of air-conditioned space 1.

[0031] Dehumidifier inlet 45 is an opening that draws in air from conditioned space 1 and sends it to dehumidifier 42. Dehumidifier inlet 45 is placed at any position on the ceiling surface of conditioned space 1, and is placed at a position away from dehumidifier outlet 44 so that air blown out from dehumidifier outlet 44 does not directly flow in.

[0032] The outlet duct 46 is a duct that connects the dehumidifier 41 and the dehumidifier outlet 44 in communication with each other on the downstream side of the flow path of the dehumidifier 41 .

[0033] The suction duct 47 is a duct that connects the dehumidifier 41 and the dehumidifier suction port 45 in communication with each other on the upstream side of the flow path of the dehumidifier 41 .

[0034] The control device 51 is a device that controls the operation of the air blower 11, the radiant heat generating device 31, and the dehumidifier 41. Details regarding the configuration of the control device 51 will be described later with reference to FIG.

[0035] The temperature sensor 52 is a sensor that detects the temperature (current temperature) of the air in the air-conditioned space 1 and transmits it to the control device 51, which will be described later. The humidity sensor 53 is a sensor that detects the relative humidity (current humidity) of the air in the air-conditioned space 1 and transmits it to the control device 51, which will be described later. The current humidity detected by the humidity sensor 53 corresponds to the "detected humidity" in the claims.

[0036] In this embodiment, the temperature sensor 52 and the humidity sensor 53 are installed on the side surface (the central portion of the nozzle length of the blowout nozzle 13c), which is one of the blowout nozzles 13, in order to detect the temperature and humidity, respectively, of the air (induced air Q1, which will be described later) flowing through the cold / hot water radiation pipe 32. In other words, the temperature sensor 52 and the humidity sensor 53 are installed upstream of the cold / hot water radiation pipe 32 on the air path through which the induced air Q1 passes.

[0037] The remote control 54 is a device having button switches and the like that allow the user to input the set temperature (target temperature) and set humidity (target humidity) for the air-conditioned space 1. The remote control 54 is installed at any position on the wall surface within the air-conditioned space 1 that can be operated by the user. The remote control 54 is connected to the control device 51 via wireless communication, and transmits information regarding the input target temperature and target humidity to the control device 51.

[0038] The display panel 55 is a liquid crystal monitor or the like, and is provided at any position visible to the user on the wall surface within the air-conditioned space 1. The display panel 55 displays on the display screen the operating status of the air blower 11, the radiant heat generating device 31, and the dehumidifier 41, as well as the current temperature, current humidity, target temperature, target humidity, etc.

[0039] Next, the detailed configuration of the blower 11 will be described with reference to Fig. 3. Fig. 3 is a layout diagram showing an image of installation of the blower 11 in the radiant air-conditioning system 100.

[0040] The air blower 11 is a device that blows a planar, uniform flow at a gentle breeze into the air-conditioned space 1. In this embodiment, as shown in Fig. 1, the air blower 11 is placed near the ceiling surface of the air-conditioned space 1, and blows a planar, uniform flow at a gentle breeze from the ceiling surface of the air-conditioned space 1 toward the floor surface.

[0041] 3, blower device 11 is configured to include blower nozzles 13 (blower nozzles 13a, 13b, 13c, 13d), blower box 14, blowers 15a, 15b collectively referred to as blower 15, blower chambers 18a, 18b collectively referred to as blower chamber 18, intake port 21, blower slits 22 (blower slits 22a, 22b, 22c, 22d), and blower outlets 23a, 23b collectively referred to as blower outlet 23. In this embodiment, blower device 11 is configured to include a plurality of (here, two) blower units 12 (blower units 12a, 12b).

[0042] Here, blower unit 12a includes blower nozzles 13a and 13b, a portion of blower box 14, blower 15a, blower chamber 18a, a portion of suction port 21, blower slits 22a and 22b, and blower outlet 23a. Blower unit 12b includes blower nozzles 13c and 13d, a portion of blower box 14, blower 15b, blower chamber 18b, a portion of suction port 21, blower slits 22c and 22d, and blower outlet 23b. Note that the components constituting blower unit 12 do not necessarily have to be configured as described above, and it is sufficient if the blower unit includes at least one blower, blower nozzle, blower chamber, suction port, blower slit, and blower outlet.

[0043] In this way, by dividing the blower device 11 into multiple blower units 12, it becomes possible to represent the blower mechanism in any conditioned space 1 by a combination of blower units 12, making it possible to generalize the system.

[0044] Hereinafter, details of the components constituting air blower 11 in this embodiment will be described. Note that air blower unit 12a and air blower unit 12b have equivalent components, and therefore air blower unit 12a will be described as an example of the air blower unit included in air blower 11.

[0045] As described above, the blower unit 12a is configured to include blowing nozzles 13a, 13b, a portion of the blower box 14, a blower 15a, a blowing chamber 18a, a portion of the suction port 21, blowing slits 22a, 22b, and a blower outlet 23a.

[0046] Fan 15a generates a pressure difference between the conditioned space 1 and fan box 14, and takes in circulating air from the conditioned space 1 through suction port 21 and blows it into air blowing chamber 18a. Fan 15a is equipped with impeller 16a and motor 17a, and blows air by driving impeller 16a with motor 17a.

[0047] Air blowing chamber 18a is a space that temporarily stores circulating air blown from blower 15a, and serves to uniformly distribute the air supplied from blower 15a to equalize the amount of air blown to blowing nozzle 13a and blowing nozzle 13b. Inside blower box 14, blower 15a and air blowing chamber 18a are separated by a wall (partition plate) and communicate with each other via blower outlet 23a. Air blowing chamber 18a communicates with blowing nozzle 13a and blowing nozzle 13b on the side opposite to the side connected to blower 15a, respectively, forming continuous air paths from blower 15a to blowing nozzle 13a and blowing nozzle 13b, respectively.

[0048] Of the six faces that each blow nozzle 13a, 13b has, blowout slits 22a, 22b, respectively, on the face facing the floor. Blowing slits 22 (blowing slits 22a, 22b) are outlets for blowing air that has passed through blowing chamber 18a and blowout nozzle 13 (blowing nozzles 13a, 13b) into the conditioned space 1, and are formed in a slit shape along the direction in which the blowout nozzle extends from blower box 14 (corresponding to the left-right direction in FIG. 3). If the length of blowout nozzles 13a, 13b in this left-right direction is defined as the blowout nozzle length, this length should be sufficiently longer than the length of one side of the contact surface with blower box 14, and it is preferable that the length of the contact surface with blower box 14 in the normal direction of blowout slits 22a, 22b be longer than the tangential direction. In this case, when the side lengths of the contact surfaces of the blowout nozzles 13a and 13b are, for example, 17 cm vertically and 4 cm horizontally, the blowout nozzle length is set to approximately 2 m. Furthermore, the blowout nozzles 13a and 13b are arranged parallel to each other so that the blowout slits 22a and 22b are located on the same plane that is approximately parallel to the ceiling surface, and a predetermined distance (e.g., 16 cm) is provided between the blowout nozzles 13a and 13b. This makes it possible to generate a wide-ranging airflow in the blowing direction while ensuring a sufficient induction space 2 between the blowout nozzles 13a and 13b. The blowout units 12a and 12b are arranged parallel to each other so that the same predetermined distance (e.g., 16 cm) is also provided between the blowout nozzle 13b and the blowout nozzle 13b of the blower unit 12b.

[0049] The blower unit 12a is configured as described above.

[0050] When blower 15a of blower unit 12a is activated, it draws in air from within air-conditioned space 1 through inlet 21 and sends the drawn-in air through blower outlet 23a into blower chamber 18a. The air sent into blower chamber 18a is then sent to blower nozzle 13a. The air sent to blower nozzle 13a is blown out through blower slits 22a toward the floor of air-conditioned space 1. The air sent into blower chamber 18a is also sent to blower nozzle 13b, just like blower nozzle 13a. The air sent to blower nozzle 13b is blown out through blower slits 22b toward the floor of air-conditioned space 1. At this time, air (induced air Q1 described later) induced by the air blown out from the blow-out slits 22a and 22b (blown-out air Q0 described later) flows between the blow-out nozzle 13a and the blow-out nozzle 13b, and the induced air Q1 that has flowed in is combined with the blown-out air Q0 and blown out toward the floor surface of the air-conditioned space 1.

[0051] Next, the detailed configuration of the radiant heat generating device 31 will be described with reference to Fig. 4. Fig. 4 is a connection schematic diagram showing the connection relationship of the cold / hot water radiation pipe 32 and other related components in the radiant heat generating device 31.

[0052] The radiant heat generating device 31 is a device that conditions the conditioned space 1 by radiant heat from a number of pipes through which a heat transfer medium such as hot or cold water flows. In this embodiment, the radiant heat generating device 31 mainly controls the temperature of the induced air Q1 blown out from the blower 11.

[0053] 4, the radiant heat generator 31 includes a cold / hot water radiation pipe 32 (cold / hot water radiation pipes 32a, 32b, 32c), a water supply pipe 33, a drain pipe 34, a cold / hot water generating chiller 35, and a water pump 36. In this embodiment, the cold / hot water radiation pipe 32a forms a pipe group having four straight pipes (pipes 32a1, 32a2, 32a3, 32a4). Similarly, the cold / hot water radiation pipe 32b and the cold / hot water radiation pipe 32c form pipe groups having four straight pipes 32b1, 32b2, 32b3, 32b4, and pipe groups having pipes 32c1, 32c2), 32c3, 32c4, respectively.

[0054] Here, among these pipe groups, the cold and hot water radiation pipes 32a, 32b, 32c with the numbers ending in "1" and "2" and the numbers ending in "3" and "4" are directly connected at one end, the pipes with the numbers ending in "1" and "3" are directly connected at the other end to the water supply pipe 33, and the pipes with the numbers ending in "2" and "4" are directly connected at the other end to the drain pipe 34. In this way, the cold and hot water radiation pipes 32a, 32b, 32c are each connected to the same water supply pipe 33 and drain pipe 34, respectively, to form a single closed system. This allows the supply paths for the cold and hot water that serves as the heat source to be consolidated into one, thereby simplifying the equipment. The connection relationship of these cold and hot water radiation pipes 32 does not necessarily have to be in this order, and there is no problem as long as all of the following conditions are met: (a) at least one pipe is connected to the water supply pipe 33, and the same number of pipes as the pipes connected to the water supply pipe 33 are connected to the drain pipe 34, and (b) when pipes are directly connected to each other, one of them is connected to the water supply pipe 33 and the other is connected to the drain pipe 34. For example, the cold and hot water radiation pipes 32a, 32b, 32c may be configured such that the pipes with the numbers ending in "1" and "2" are connected to the water supply pipe 33, the pipes with the numbers ending in "3" and "4" are connected to the drain pipe 34, and the pipes with the numbers ending in "1" and "3", and "2" and "4" are directly connected, respectively.

[0055] To ensure reliable water supply and drainage to and from all of the chilled / hot water radiation pipes 32a, 32b, and 32c, the water supply pipe 33 and the drain pipe 34 are preferably made of pipes with a larger diameter than the chilled / hot water radiation pipes 32a, 32b, and 32c, and configured to accommodate large flow rates. For example, if the diameter of all pipes included in the chilled / hot water radiation pipe 32 is 5 mm, the water supply pipe 33 and the drain pipe 34 should each have a diameter of approximately 20 mm. Note that although the diameter of the water supply pipe 33 and the drain pipe 34 is referred to as "diameter," their cross sections do not necessarily have to be circular; for example, pipes with a rectangular cross section may be used.

[0056] Next, the flow of water circulating inside the radiant heat generating device 31 will be described with reference to FIGS.

[0057] First, as shown in FIGS. 1 and 4 , water introduced into the chilled / hot water generating chiller 35 is heated or cooled within the chilled / hot water generating chiller 35. For example, a heat pump system using a refrigerant is used for heating or cooling. The heated or cooled chilled / hot water is then temporarily stored in a tank or other storage location within the chilled / hot water generating chiller 35, and is then pumped to the water supply pipe 33 at a desired flow rate by driving the water pump 36. The chilled / hot water supplied to the water supply pipe 33 is then distributed and pumped to the chilled / hot water radiation pipes 32a, 32b, and 32c, respectively, and circulates near the blowing nozzle 13 of the air blower 11 before being collected in the drain pipe 34. The water collected in the drain pipe 34 is then sequentially sent to the chilled / hot water generating chiller 35 and reused as a heat source. In this way, the water in the radiation heat generator 31 is repeatedly used as a heat source, allowing the system to be completed with only a small amount of water. However, if there is concern that the quality of the water flowing inside may deteriorate due to scale buildup on the piping, it is preferable to ensure redundancy by setting up a separate route connected to a purification filter or water supply, etc., and purify or replace the water.

[0058] Here, an image of the transition in water temperature when using the radiant heat generating device 31 in this embodiment will be explained using an example of use during the cooling season.

[0059] In the radiant heat generator 31, water flowing into the chilled / hot water generating chiller 35 at 25°C is cooled to 18°C ​​and sent to the water supply pipe 33. The chilled water then distributed to the chilled / hot water radiation pipe 32 is gradually heated as it passes through the air in the air-conditioned space 1 (induced air Q1 blown out from the air blower 11) and as it radiates heat from the walls that make up the air-conditioned space 1, furniture placed inside, and radiating bodies such as human bodies. The water, which has reached 25°C by the time it is collected from the chilled / hot water radiation pipe 32 into the drain pipe 34, is sent back to the chilled / hot water generating chiller 35 and cooled to 18°C, repeating this cycle. Note that the temperature transition shown here is merely an example and may not apply to use during the heating season, for example. In addition, if the cold or hot water passing through the water supply pipe 33 can easily change depending on the external environment, there is a concern that the capacity as a heat source may be insufficient or that the temperature of the cold or hot water may become uneven among the cold or hot water radiation pipes 32a, 32b, and 32c.In such cases, it is preferable to take measures such as using a highly insulating material for the water supply pipe 33.

[0060] Next, the positional relationship between the blowing nozzle 13 of the blower 11 and the cold / hot water radiation pipe 32 of the radiant heat generator 31 will be described with reference to Fig. 5. Fig. 5 is a configuration diagram showing the positional relationship between the blowing nozzle 13 of the blower 11 and the cold / hot water radiation pipe 32 of the radiant heat generator 31 that constitute the radiant air-conditioning system 100.

[0061] As shown in FIG. 5, the blowout nozzles 13 (blowout nozzles 13a, 13b, 13c, and 13d) are arranged offset from the ceiling surface in the air-conditioned space 1 so as to form an induction space 2 between the ceiling surface and the blowout slits. The blowout nozzles 13a, 13b, 13c, and 13d each have a blowout slit 22a, 22b, 22c, or 22d on the surface facing the floor. The blowout nozzles 13a, 13b, 13c, and 13d are arranged in parallel at equal intervals, and the blowout slits 22a, 22b, 22c, and 22d are also arranged in parallel at equal intervals. For example, the intervals between the center lines of the blowout nozzles 13 (the intervals between the blowout slits 22) are 200 mm, and the gaps between the blowout nozzles 13 (part of the induction space 2) are 160 mm. Each of the blowout slits 22 is provided along the length of the blowout nozzle 13. The position of the blowout slit 22 is provided on a line that divides the surface of the blowout nozzle 13 into two equal parts in the direction in which the blowout nozzle 13 is arranged side by side (direction perpendicular to the length direction).

[0062] 5, in the radiant air conditioning system 100, cold / hot water radiation pipes 32 are arranged in the gaps between adjacent blowout nozzles 13. It can also be said that the cold / hot water radiation pipes 32 are each arranged on an air path formed in the gaps between adjacent blowout nozzles 13. More specifically, cold / hot water radiation pipe 32a is arranged between blowout nozzle 13a and blowout nozzle 13b, cold / hot water radiation pipe 32b is arranged between blowout nozzle 13b and blowout nozzle 13c, and cold / hot water radiation pipe 32c is arranged between blowout nozzle 13c and blowout nozzle 13d. In other words, the cold / hot water radiation pipe 32a is arranged on the air path formed between the blow-out nozzle 13a and the blow-out nozzle 13b, the cold / hot water radiation pipe 32b is arranged on the air path formed between the blow-out nozzle 13b and the blow-out nozzle 13c, and the cold / hot water radiation pipe 32c is arranged on the air path formed between the blow-out nozzle 13c and the blow-out nozzle 13d.

[0063] Here, the chilled / hot water radiation pipes 32 have multiple pipes, the same number of pipes, in all gaps between adjacent blowout nozzles 13. The chilled / hot water radiation pipes 32 are all arranged so that the distance between adjacent pipes is the same, and the pipes located at the ends of consecutively arranged pipes (e.g., pipes 32a1 and 32a4 in FIG. 5) are all located at a constant distance from the nearest blowout nozzle 13. These distances are set, for example, so that the distance between adjacent pipes is 40 mm and the distance between adjacent blowout nozzles 13 is 20 mm. In this way, air paths for the airflow that has passed through the induction space 2 are formed between adjacent pipes and between adjacent blowout nozzles 13, allowing the passing airflow to reach the conditioned space 1 while maintaining a uniform distribution. The airflow paths around each pipe of the chilled / hot water radiation pipes 32 will be described later with reference to FIG. 7.

[0064] Furthermore, the chilled / hot water radiation pipe 32 (chilled / hot water radiation pipes 32a, 32b, 32c) are arranged on the same plane as the surface of the discharge slit 22 (discharge slits 22a, 22b, 22c), and all of the pipe groups (pipes 32a1 to 32a4, etc.) are arranged on the same plane as the discharge slit 22. More specifically, all of the multiple pipes (pipes 32a1 to 32a4, etc.) are arranged at the same height, and these pipes are arranged so that their lowest points are at the same height as the discharge slit 22. In this way, the chilled / hot water radiation pipe 32 is not shaded by the discharge nozzle 13 and is arranged in a position exposed to the air-conditioned space 1. In this case, heat radiation from a human body or the like arranged in the air-conditioned space 1 is reliably carried out, and the thermal comfort felt by people living in the air-conditioned space 1 can be further improved. This effect is based on the principle that the amount of heat transferred between two objects due to thermal radiation is proportional to the cross-sectional area of ​​the direct contact between the two objects and the distance between the two objects.

[0065] Next, the flow of air within blower 11 will be described with reference to Fig. 6. Fig. 6 is a top view showing the flow of air within blower 11.

[0066] In blower device 11, intake air A0 drawn in through intake port 21 is distributed by the action of blowers 15a and 15b into air A1a flowing into blower unit 12a and air A1b flowing into blower unit 12b. Here, blower units 12a and 12b have the same configuration and are arranged symmetrically with respect to the boundary between blower units 12a and 12b, so that the relationship between blower units 12a and 12b is such that the air volume of air A1a = the air volume of air A1b is generally satisfied. Thereafter, the air A2a and air A2b that pass through the blower outlet 23a and the blower outlet 23b are temporarily accumulated in the blowing chamber 18a and the blowing chamber 18b, respectively, and are blown sequentially to the blowing nozzles 13a, 13b and the blowing nozzles 13c, 13d by being pushed in from the blowers 15a and 15b.

[0067] Nozzle air A3a, A3b, A3c, and A3d are blown from blowing nozzles 13a, 13b, 13c, and 13d, respectively. The relationship between the respective air volumes is not strictly defined, but it is desirable to arrange blowing nozzles 13a and 13b, and blowing nozzles 13c and 13d symmetrically about the center lines of blowing chambers 18a and 18b, respectively, so that the air volume of nozzle air A3a = the air volume of nozzle air A3b = the air volume of nozzle air A3c = the air volume of nozzle air A3d. While flowing in the nozzle length direction, each of nozzle airs A3a, A3b, A3c, and A3d flows out from blowing slits 22a, 22b, 22c, and 22d toward the back of the drawing as blown air Q0 (see FIG. 7). Although not shown in FIG. 6, fins or the like for straightening the airflow may be provided inside the blowout nozzle 13 in order to keep the amount of air flowing out from the blowout slit 22 constant regardless of the nozzle length direction.

[0068] Next, the flow of blown air Q0 from the blowout nozzle 13 and the resulting flow of induced air Q1 generated near the blowout nozzle 13 and the cold / hot water radiation pipe 32 will be described with reference to Fig. 7. Fig. 7 is a cross-sectional view showing the flow directions of blown air Q0 from the blowout nozzle 13 of the blower 11 and induced air Q1 generated near the cold / hot water radiation pipe 32.

[0069] The air sent to the blowout nozzles 13a, 13b, 13c, and 13d is discharged as blown air Q0 from the blowout slits 22a, 22b, 22c, and 22d into the conditioned space 1. Because the blowout nozzles 13a, 13b, 13c, and 13d each discharge approximately the same amount of air from the blowout slits 22a, 22b, 22c, and 22d, as described above, the blown air Q0 has a uniform wind speed distribution in the parallel direction of the blowout nozzles 13, with peaks at each interval between the blowout slits 22. Because the blown air Q0 utilizes a slit-shaped outlet, it has a relatively high wind speed relative to its air volume, generating an airflow with a high degree of linearity in the blowout direction. Furthermore, this blown air Q0 generates a pressure difference between the periphery of the blowout nozzle 13 and the induction space 2, generating induced air Q1 that flows into the induction space 2 between the blowout nozzle 13 and the ceiling surface. Here, since the induced air Q1 is air introduced into the induction space 2, which has a cross-sectional area that is very large compared to the cross-sectional area of ​​the blow-out slit 22, it has the property of having a very small wind speed relative to the air volume, and generally the relationship of air volume is: air volume of blown air Q0 < air volume of induced air Q1.

[0070] The induced air Q1 is drawn in the direction of the blown air Q0 from the blow-out nozzles 13 and passes near the chilled / hot water radiation pipes 32 (chilled / hot water radiation pipes 32a, 32b, 32c). At this time, the diameter of the chilled / hot water radiation pipes 32 is such that sufficient space is secured between adjacent blow-out nozzles 13, so that the induced air Q1 passes near the pipes while maintaining its straightness without losing its distribution, and is released into the conditioned space 1 as induced air Q2. In other words, the air volume relationship is (air volume of induced air Q1 - air volume of induced air Q2) / air volume of induced air Q2 << 1.

[0071] Furthermore, as the induced air Q1 passes near the chilled / hot water radiation pipe 32 and becomes induced air Q2, it is heated or cooled by convective heat transfer. For example, when the temperature T1 of the induced air Q1 is 28°C (the same temperature as the temperature of the air-conditioned space 1) and the surface temperature Tp of the chilled / hot water radiation pipe 32 is 18°C, the temperature T2 of the induced air Q2 is cooled to a value between the temperatures T1 and Tp (for example, 25°C). The cooled induced air Q2 then combines with the blown air Q0 from the blow-out nozzle 13 and is blown into the air-conditioned space 1 as a gentle, planar, uniform flow.

[0072] In this way, the radiant heat generating device 31 conditions the air in the conditioned space 1 and improves thermal comfort by utilizing the blown air Q0 and induced air Q1 from the blower 11. Generally, the heat transfer coefficient of the surface of the chilled / hot water radiant pipe 32 increases as the wind speed of the airflow over the surface increases, so the generation of induced air Q1 can achieve higher air conditioning capacity than when no airflow is generated. Therefore, in this embodiment, the thermal comfort of the radiant air-conditioning system 100 can be further improved.

[0073] Next, the basic functions of the control device 51 will be described with reference to Fig. 8. Fig. 8 is a schematic block diagram showing the basic functions of the control device 51.

[0074] The control device 51 includes an input unit 51a, a processing unit 51b, an output unit 51c, a storage unit 51d, and a timing unit 51e. The control device 51 is also connected to a temperature sensor 52, a humidity sensor 53, a remote control 54, a radiant heat generating device 31, a dehumidifier 41, and a display panel 55 so that they can communicate with each other.

[0075] The input unit 51a receives information (first information) related to the temperature of the air-conditioned space 1 transmitted from the temperature sensor 52, information (second information) related to the humidity of the air-conditioned space 1 transmitted from the humidity sensor 53, and information (third information) related to the user's input settings transmitted from the remote control 54. The input unit 51a outputs the received first information to third information to the processing unit 51b.

[0076] The storage unit 51d stores data referenced or updated by the processing unit 51b. For example, the storage unit 51d stores an algorithm for determining the operation modes of the air blower 11, the radiant heat generating device 31, and the dehumidifier 41. The storage unit 51d also stores the first information to the third information received by the input unit 51a in chronological order. The storage unit 51d then outputs the stored data (stored data) to the processing unit 51b in response to a request from the processing unit 51b.

[0077] The timekeeping unit 51e is used to measure time as needed in the programs executed by the processing unit 51b, and outputs data indicating the current time (time data) to the processing unit 51b.

[0078] Processing unit 51b receives first information to third information from input unit 51a, stored data from memory unit 51d, and time data from timer unit 51e. Using the received information, processing unit 51b determines whether to perform an air blowing operation, a dehumidifying operation, or a cooling operation for air-conditioned space 1 at regular intervals (e.g., every five minutes). More specifically, processing unit 51b determines whether to perform or stop the operation of air blower 11 based on the third information. Processing unit 51b also determines whether to perform or stop the operation of dehumidifier 41 at regular intervals based on the time data acquired from timer unit 51e and the humidity difference between the target humidity stored in memory unit 51d and the current humidity detected by humidity sensor 53 installed in air-conditioned space 1. Furthermore, when the operating operation of the air blower 11 is being performed, the processing unit 51b periodically determines whether the operating operation of the radiant heat generator 31 is being performed or stopped based on the humidity difference between the target temperature stored in the memory unit 51d and the current temperature detected by the temperature sensor 52 installed in the air-conditioned space 1, or information regarding the current temperature and current humidity detected by the temperature sensor 52 and humidity sensor 53 installed in the air-conditioned space 1, based on time data acquired from the timer unit 51e. If the operating operation of the radiant heat generator 31 is determined to be performed, the processing unit 51b determines the chilled water temperature at the time of the operating operation. The processing unit 51b then outputs the determined control information to the output unit 51c. Furthermore, the processing unit 51b updates the display information on the display panel 55 and outputs the updated display information to the output unit 51c. The method for determining the processing operations of the dehumidifier 41 and the radiant heat generator 31 performed by the processing unit 51b will be described later with reference to FIGS. 9 and 10.

[0079] The output unit 51c outputs the control information received from the processing unit 51b to the air blower 11, the dehumidifier 41, and the radiant heat generating device 31. The display panel 55 outputs the display information received from the processing unit 51b to the display panel 55.

[0080] Then, the air blower 11 performs an air blowing operation based on the control information output from the output unit 51c. The dehumidifier 41 performs a dehumidifying operation based on the control information output from the output unit 51c. The radiant heat generating device 31 performs a cooling operation based on the control information output from the output unit 51c. The display panel 55 updates the screen display based on the display information output from the output unit 51c.

[0081] In the manner described above, the control device 51 causes the dehumidifier 41 and the radiant heat generating device 31 to perform their respective operations.

[0082] Next, the processing operation of the dehumidification control by the control device 51 will be described with reference to Fig. 9. Fig. 9 is a flowchart showing the processing operation related to the dehumidification control by the control device 51. Note that the operation of the dehumidifier 41 basically changes its processing operation only in the cooling season, so the following description will be limited to the processing operation control in the cooling season.

[0083] <Dehumidification control operation> First, the control device 51 determines whether time has passed based on information from the timer unit 51e (step S01). As a result, if the predetermined time (e.g., 10 minutes) has not passed since the previous process (NO in step S01), the control device 51 returns to step S01 again. On the other hand, if the predetermined time has passed since the previous process (YES in step S01), the control device 51 proceeds to step S02, where it proceeds to specifying a processing operation related to dehumidification control.

[0084] Next, the control device 51 acquires information on the current temperature and current humidity obtained from the temperature sensor 52 and humidity sensor 53 installed in the air-conditioned space 1, and information on the target temperature and target humidity input from the remote control 54, and calculates and specifies the current absolute humidity and the target absolute humidity of the air-conditioned space 1. Then, the process proceeds to step S03.

[0085] In step S03, a determination is made as to whether the current absolute humidity calculated in step S02 exceeds the target absolute humidity as a dehumidification operation determination for dehumidifier 41. If the determination result shows that the current absolute humidity exceeds the target absolute humidity (YES in step S03), it is determined that dehumidification treatment is necessary for the air-conditioned space 1, and the dehumidification operation of dehumidifier 41 is turned "ON" to cause dehumidification operation by dehumidifier 41 to execute (step S04). On the other hand, if the determination result shows that the current absolute humidity is equal to or lower than the target absolute humidity (NO in step S03), it is determined that dehumidification treatment is unnecessary for the air-conditioned space 1, the dehumidification operation of dehumidifier 41 is turned "OFF," and the processing operation is terminated without performing dehumidification operation by dehumidifier 41 (step S05).

[0086] In this way, the control device 51 specifies the dehumidifying operation of the dehumidifying device 41, and returns to step S01 to repeat the processing operation of the dehumidifying control.

[0087] Next, the processing operation relating to the chilled water temperature control by the control device 51 will be described with reference to Fig. 10. Fig. 10 is a flowchart showing the processing operation of the control device 51 relating to the chilled water temperature control.

[0088] <Chilled water temperature control> First, the control device 51 determines whether time has passed based on information from the timer unit 51e (step S11). As a result, if the control device 51 determines that a certain time (e.g., 10 minutes) has not passed since the previous process (NO in step S11), the control device 51 returns to step S11 again. On the other hand, if the certain time has passed since the previous process (YES in step S11), the control device 51 proceeds to step S12, where it proceeds to specifying a processing operation related to dehumidification control.

[0089] Next, the control device 51 acquires information on the current temperature and current humidity obtained from the temperature sensor 52 and humidity sensor 53 installed in the air-conditioned space 1, and information on the target temperature and target humidity input from the remote control 54 (step S12). Then, the process proceeds to step S13.

[0090] In step S13, the control device 51 determines whether the current temperature acquired in step S12 exceeds the target temperature as an operating operation determination for the radiant heat generating device 31. If the result of the determination is that the current temperature exceeds the target temperature (YES in step S13), it determines that cooling processing is required for the air-conditioned space 1, and proceeds to step S14 to specify the processing operation to be performed by the radiant heat generating device 31. On the other hand, if the result of the determination is that the current temperature is equal to or lower than the target temperature (NO in step S13), it determines that cooling processing is not required for the air-conditioned space 1, turns the cooling operation of the radiant heat generating device 31 "OFF," and ends the processing operation without performing a cooling operation by the radiant heat generating device 31 (step S18).

[0091] Next, in step S14, the control device 51 determines whether or not to operate the radiant heat generating device 31 based on the current humidity information of the air-conditioned space 1. More specifically, it determines whether the current absolute humidity of the air-conditioned space 1 exceeds a first reference humidity. Here, the first reference humidity is defined as the absolute humidity at which cooling of the air-conditioned space 1 can begin, and is set to, for example, 14.2 g / kg (an absolute humidity value equivalent to a temperature of 28°C and a relative humidity of 60%).

[0092] If the result of the determination in step S14 is that the current absolute humidity is less than the first standard humidity (YES in step S14), it is determined that the operation of the radiant heat generating device 31 will be performed, and the process proceeds to step S15. On the other hand, if the result of the determination is that the current absolute humidity is equal to or greater than the first standard humidity (NO in step S14), it is determined that the operation of the radiant heat generating device 31 will not be performed, the cooling operation of the radiant heat generating device 31 is turned "OFF," and the processing operation is terminated without performing the cooling operation by the radiant heat generating device 31 (step S18). As a result, if the current absolute humidity in the air-conditioned space 1 is high, cooling of the chilled / hot water radiation pipe 32 does not occur, and the chilled / hot water radiation pipe 32 is cooled only after the current absolute humidity has dropped to the first standard humidity, thereby suppressing condensation on the surface of the chilled / hot water radiation pipe 32 in the pre-dehumidification stage of the air-conditioned space 1.

[0093] Next, in step S15, the control device 51 calculates and identifies the dew-point temperature of the air-conditioned space 1 based on information about the current temperature and current humidity obtained from the temperature sensor 52 and humidity sensor 53 installed in the air-conditioned space 1. Here, the dew-point temperature indicates the lower limit temperature at which condensation does not occur at a predetermined absolute humidity value. The processing in step S15 is performed as a preliminary step for controlling the temperature of the cold water used to cool the chilled / hot water radiation pipe 32 to a range that does not cause condensation. The dew-point temperature can be determined using empirical formulas such as the following formulas (1) and (2).

[0094] Tdp=A+B*t+C*rh+D / rh (rh≧60)...Equation (1) Tdp=E+F*t+G*rh (rh<60)...Equation (2) where Tdp is the dew point temperature, t is the temperature, rh is the relative humidity, and A, B, C, D, E, F, and G are experimentally determined constants: A = -4.8, B = 0.983, C = 0.109, D = -583, E = -26.44, F = 0.899, and G = 0.3545.

[0095] Next, in step S16, the control device 51 determines the chilled water temperature based on the dew-point temperature determined in step S15. More specifically, the control device 51 updates the set water temperature of the radiant heat generator 31 to the lowest integer value that is not lower than the dew-point temperature determined in step S15. That is, for example, if the dew-point temperature is 17.5°C, the set water temperature is set to 18°C. The process then proceeds to step S17, where the radiant heat generator 31 performs a cooling operation at the determined chilled water temperature. Note that if the chilled water temperature is higher than the current temperature of the air-conditioned space 1, the surface temperature of the chilled / hot water radiation pipe 32 will be higher than the set water temperature. Therefore, by controlling the set water temperature so that it does not fall below the dew-point temperature of the air-conditioned space 1, the surface temperature of the chilled / hot water radiation pipe 32 will be higher than the dew-point temperature. This reliably suppresses condensation on the surface of the chilled / hot water radiation pipe 32.

[0096] In this manner, the control device 51 specifies the cooling operation to be performed by the radiant heat generating device 31, and returns to step S11 to repeat the processing operation.

[0097] As described above, the radiant air-conditioning system 100 according to the first embodiment can provide the following effects.

[0098] (1) The radiant air conditioning system includes a blower device 11 including a plurality of blowing nozzles 13 (blowing nozzles 13a, 13b, 13c, 13d) having blowing slits 22 (blowing slits 22a, 22b, 22c, 22c) and a blower 15 (blowers 15a, 15b) that blows air to the blowing nozzles 13, a radiant heat generator 31 having a plurality of chilled / hot water radiation pipes 32 (chilled / hot water radiation pipes 32a, 32b, 32c) that generate thermal radiation in the space 1 to be air-conditioned, and a control device 51 that controls the operation of the radiant heat generator 31. The plurality of blowing nozzles 13 are arranged side by side with gaps between them so that the blowing slits 22 are positioned on the same plane. Each of the multiple cold / hot water radiation pipes 32 is disposed in the gap between adjacent blow-out nozzles 13, and is disposed on an air path through which induced air Q1 passes, which is induced by blown air Q0 blown from the blower 11. The control device 51 controls the radiant heat generating device 31 to operate when the humidity (current humidity) in the air-conditioned space 1 is less than a first reference humidity, and controls the radiant heat generating device 31 to stop operating when the humidity in the air-conditioned space 1 is equal to or greater than the first reference value.

[0099] As a result, when the humidity of the air in the air-conditioned space 1 (induced air Q1 drawn into the gaps in the blow-out nozzles) is less than the first standard humidity and the air in the air-conditioned space 1 is sufficiently dehumidified, the air in the air-conditioned space 1 exchanges heat with the surface of the chilled / hot water radiation pipe 32 and combines with the air blown out from the blow-out nozzle 13, so that it is blown into the air-conditioned space 1 as a gentle, planar, uniform flow. On the other hand, when the humidity of the air in the air-conditioned space 1 is equal to or higher than the first standard humidity and the air in the air-conditioned space 1 is not sufficiently dehumidified and the humidity is high, the radiant heat generating device 31 is stopped and the air is blown into the air-conditioned space 1 as a gentle, planar, uniform flow. As a result, air conditioning can be performed within a range that does not cause condensation on the surface of the chilled / hot water radiation pipe 32, while suppressing temperature bias or a feeling of draft. In other words, the radiant air-conditioning system 100 can improve the thermal comfort of the air-conditioned space 1 while suppressing condensation on the surface of the hot and cold water radiant pipe 32 (surface of the radiant panel).

[0100] (2) In the radiant air-conditioning system 100, the humidity of the conditioned space 1 is the detected humidity (current humidity) detected by a humidity sensor 53 installed in the air path through which the induced air Q1 passes upstream of the multiple cold and hot water radiant pipes 32, and the control device 51 humidity The operation of the radiant heat generating device 31 is controlled based on the detected humidity of the air in the air-conditioned space 1 (induced air Q1 drawn into the gaps of the blow-out nozzles 13) flowing over the surface of the cold / hot water radiation pipe 32, which is the area most likely to cause condensation in the air-conditioned space 1. This makes it possible to enjoy the effect of suppressing condensation by controlling the operation of the radiant heat generating device 31 with greater precision.

[0101] (3) The radiant air-conditioning system 100 is equipped with a dehumidifier 41 that dehumidifies the air in the conditioned space 1. The control device 51 controls the dehumidifier 41 to operate when the current absolute humidity in the conditioned space 1 is equal to or higher than a target absolute humidity calculated from the target temperature and target humidity of the conditioned space 1, and to stop the operation of the dehumidifier 41 when the current absolute humidity is lower than the target absolute humidity. As a result, regardless of the temperature state of the conditioned space 1, the dehumidifier 41 continues to perform dehumidification control until the absolute humidity reaches the dehumidification target value. Therefore, the conditioned space 1 can be sufficiently dehumidified without cooling it, further enhancing the effect of suppressing condensation.

[0102] (4) In the radiant air-conditioning system 100, the multiple chilled / hot water radiant pipes 32 generate radiant heat to the air-conditioned space 1 by supplying chilled / hot water generated by the chilled / hot water generating chiller 35 to the inside of the chilled / hot water radiant pipes 32. This makes it possible to continuously generate heat by sending chilled / hot water whose temperature has been adjusted in advance by the chilled / hot water generating chiller 35 to the chilled / hot water radiant pipes 32. This makes it easy to increase the thermal comfort of the air-conditioned space 1.

[0103] (5) In the radiant air-conditioning system 100, the control device 51 controls the temperature of the cold / hot water generated by the cold / hot water generating chiller 35 so that it is higher than the dew point temperature of the air-conditioned space 1. This controls the temperature of the surface of the cold / hot water radiation pipe 32, which is most likely to cause condensation in the air-conditioned space 1, to a temperature range that does not cause condensation. This makes it possible to reliably suppress the occurrence of condensation by controlling the operation of the radiant heat generating device 31.

[0104] (6) The radiant air-conditioning system 100 is configured to include an air blower 11 having a plurality of blow-out nozzles 13 (blow-out nozzles 13a, 13b, 13c, 13d) that generate a gentle breeze of planar air (blow-out air Q0), and a radiant heat generator 31 that is disposed between adjacent blow-out nozzles 13 and has a plurality of chilled / hot water radiant pipes 32 (chilled / hot water radiant pipes 32a, 32b, 32c) that generate thermal radiation. The radiant heat generator 31 is configured to perform an operation based on the humidity (current humidity) of the air (induced air Q1) flowing into the chilled / hot water radiant pipes 32.

[0105] As a result, when the induced air Q1 is sufficiently dehumidified, the radiant heat generating device 31 operates to perform temperature adjustment evenly across the entire air blowing surface blown by the blower 11, while when the induced air Q1 is not sufficiently dehumidified and the humidity is high, the radiant heat generating device 31 stops operating to blow the induced air Q1 as a planar, uniform flow at a gentle breeze without temperature adjustment into the air-conditioned space 1. In other words, while suppressing the occurrence of condensation on the surface of the chilled / hot water radiation pipe 32 due to the operation of the radiant heat generating device 31, air conditioning is achieved that suppresses temperature bias or a draft feeling throughout the air-conditioned space 1, and an air-conditioned space 1 with no uneven perceived temperature can be achieved.

[0106] The present disclosure has been described above based on the embodiments. These embodiments are merely examples, and it will be understood by those skilled in the art that various modifications are possible in the combination of each component or each treatment process, and that such modifications are also within the scope of the present disclosure.

[0107] In the radiant air-conditioning system 100 according to the first embodiment, the chilled / hot water radiation pipes 32 are arranged on the same plane as the discharge slits 22, but this is not limiting. It is sufficient that the chilled / hot water radiation pipes 32 are arranged so as to be exposed to the air-conditioned space 1 without being shaded by the discharge nozzles 13. For example, all of the chilled / hot water radiation pipes 32 may be arranged on the same plane downstream of the plane defined by the discharge slits 22 in the direction of the flow of the discharge air Q0. Alternatively, each of the chilled / hot water radiation pipes 32 may be arranged in the space formed between adjacent discharge nozzles 13. In this case, all of the chilled / hot water radiation pipes 32 may be arranged on the same plane, or may be arranged differently. Even in this case, there are no obstacles between the chilled / hot water radiation pipes 32 and the air-conditioned space 1, which promotes heat radiation. This further enhances thermal comfort due to radiant heat.

[0108] Furthermore, in the radiant air-conditioning system 100 according to the first embodiment, the group of pipes arranged between the blow-out nozzles 13 is configured with four pipes, but this is not limited to this. As long as at least one pipe is connected to the water supply pipe 33 and the drain pipe 34 and the number of pipes connected is the same, for example, the number of pipes making up the group of pipes may be two, six, eight, etc.

[0109] Furthermore, in the radiant air-conditioning system 100 according to the first embodiment, the blower 11 is installed offset from the ceiling surface that constitutes the air-conditioned space 1, so that the air Q0 blown from the blower nozzle 13 is blown from the ceiling surface toward the floor surface, but this is not limited to this. For example, the blower 11 may be installed offset from the side wall surface of the air-conditioned space 1, so that the air Q0 blown from the blower nozzle 13 is blown toward the opposite side wall surface. Even in this way, induced air Q1 can be taken in over a wide area from the induction space 2 between the side wall surface and the blower nozzle 13, and stable air blowing toward the opposite side wall surface can be achieved.

[0110] Furthermore, in the radiant air-conditioning system 100 according to the first embodiment, there is one dehumidifier outlet 44 and one dehumidifier inlet 45, but this is not limited to this. Since it is sufficient to take in air of a temperature and humidity representative of the entire conditioned space 1 and dehumidify it uniformly, the dehumidifier outlets 44 and dehumidifier inlets 45 may be provided at multiple locations on the ceiling surface and sent out. In this case, the outlet ducts 46 and the inlet ducts 47 connecting the multiple dehumidifier outlets 44 and the multiple dehumidifier inlets 45, respectively, are joined or separated using branch ducts or the like, and the inflow path to the dehumidifier 41 and the outflow path from the dehumidifier 41 are each configured to be consolidated into a single path. [Industrial Applicability]

[0111] The radiant air-conditioning system according to the present invention is useful as it can increase thermal comfort in the conditioned space while suppressing the occurrence of condensation on the surface of the radiant panel. [Explanation of symbols]

[0112] 100 Radiant air conditioning system 1 Conditioned space 2. Attractive Space 3 Attic space 11. Blower 12, 12a, 12b Blower units 13, 13a, 13b, 13c, 13d blowing nozzle 14 Blower box 15, 15a, 15b blower 16a, 16b impellers 17a, 17b motor 18, 18a, 18b Air blowing chamber 21 Intake port 22, 22a, 22b, 22c, 22d Blowing slits 23, 23a, 23b Blower outlet 31 Radiant heat generator 32, 32a, 32b, 32c Cold and hot water radiant pipes 32a1, 32a2, 32a3, 32a4 pipes 32b1, 32b2, 32b3, 32b4 pipes 32c1, 32c2, 32c3, 32c4 pipes 33 Water supply pipe 34 Drain pipe 35 Chilled and hot water generating chiller 36 Water pump 41 Dehumidifier 42 Dehumidifier 43 Conveyor fan 44 Dehumidifier outlet 45 Dehumidifier intake 46 Air outlet duct 47 Intake duct 51 Control device 51a Input section 51b Processing section 51c output section 51d Storage section 51e Timekeeping section 52 Temperature Sensor 53 Humidity Sensor 54 Remote Control 55 Display panel A0 Intake air A1a, A1b air A2a, A2b air A3a, A3b, A3c, A3d nozzle air Q0 Blowout air Q1 Induced air Q2 Induced air

Claims

1. a blower device including a plurality of blowing nozzles each having a slit-shaped blowing outlet and a blower that blows air to the blowing nozzles; a radiant heat generating device having a plurality of pipes that generate thermal radiation in the space to be air-conditioned; a control device for controlling the operation of the radiant heat generating device; Equipped with the plurality of blow-out nozzles are arranged side by side with gaps between them so that the blow-out ports are positioned on the same plane, each of the plurality of pipes is disposed in the gap between the adjacent blowout nozzles and on an air path through which induced air passes that is induced by the blown air blown from the blower device; The control device controls the operation of the radiant heat generating device when the humidity in the air-conditioned space is less than a first standard humidity, and stops the operation of the radiant heat generating device when the humidity in the air-conditioned space is equal to or greater than the first standard humidity.

2. the humidity in the conditioned space is a detected humidity detected by a humidity sensor installed on an air path through which the induced air passes, the humidity being upstream of the plurality of pipes; The radiant air-conditioning system according to claim 1 , wherein the control device controls the operation of the radiant heat generating device based on the detected humidity.

3. Further provided is a dehumidifying device that dehumidifies the air in the conditioned space, The radiant air conditioning system described in claim 1 or 2, characterized in that the control device controls the dehumidifier to operate when the absolute humidity of the air-conditioned space is equal to or higher than the target absolute humidity calculated from the target temperature and target humidity of the air-conditioned space, and controls the dehumidifier to stop operating when the absolute humidity is below the target absolute humidity.

4. The radiant air conditioning system of any one of claims 1 to 3, characterized in that the plurality of pipes generate radiant heat to the air-conditioned space by supplying cold and hot water produced by a cold and hot water chiller inside the pipes.

5. The radiant air-conditioning system according to claim 4, wherein the control device controls the chilled / hot water chiller so that the temperature of the chilled / hot water becomes higher than the dew point temperature of the space to be air-conditioned.

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