Air conditioning system and air conditioning method

Abstract

To provide an air conditioning system for realizing efficient air conditioning, and to provide an air conditioning method.SOLUTION: An air conditioning system A1 sets an indoor space S1 formed by a slab 100 as an air conditioned space. The air conditioning system A1 includes: a radiation panel 220 which is provided at a position away from a surface of the slab 100 so as to cover at least a part of the surface of the slab 100 and has vent holes 221; pipes 222 which are provided parallel to each other contacting with the radiation panel 220 and in each of which a fluid having an adjusted temperature flows; and a fan 223 which is supported by the radiation panel 220 and controlled so as to switch its state among a first drive state in which the fan forms first airflow flowing to the slab 100 through the vent holes 221, a second drive state in which the fan forms second airflow flowing to the indoor space S1 through the vent holes 221, and a stop state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an air conditioning system and an air conditioning method using hot and cold water pipes.

Background Art

[0002] The radiant air conditioning method directly transfers energy between a radiation source installed on a ceiling or the like and an indoor object via far infrared rays. Compared with convection air conditioning via air, it is possible to achieve both energy saving and comfort with less unpleasant air feeling and less indoor vertical temperature difference.

[0003] 于 Air conditioning systems capable of forming a substantially uniform radiation surface over the entire ceiling by ceiling radiant air conditioning have also been studied (see, for example, Patent Document 1). In the technique described in this document, the slit-shaped air outlet formed between the ceiling surface of the ceiling board and the upper surface of the vane blows out the air flow from the flow path toward the air conditioning target space.

[0004] In addition, an attachment structure for attaching the pipes of a radiant air conditioning system to the ceiling has also been studied (see, for example, Patent Document 2). The attachment structure described in this document includes a planar plate provided below the ceiling slab in a building and a pipe holder attached to the plate for holding the pipe. By the attachment structure for fixing the plate, the reverse side to which the pipe holder is attached faces and is separated from the ceiling slab, and the plate is attached to the ceiling slab.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, the technology described in Patent Document 1 requires the installation of an indoor unit. Furthermore, the technology described in Patent Document 2 uses hot and cold water flowing through pipes for temperature control. In this case, efficient air conditioning may not be achievable. [Means for solving the problem]

[0007] The air conditioning system that solves the above problems uses a space formed by a cement composition as the space to be air-conditioned. The system includes a radiant panel with an opening, positioned away from the surface of the structure and covering at least a portion of the surface of the structure; piping arranged in parallel with the radiant panel and carrying a temperature-controlled fluid; and a fan supported by the radiant panel, which is controlled by switching between a first driving state that forms a first airflow toward the structure through the opening, a second driving state that forms a second airflow toward the space to be air-conditioned through the opening, and a stopped state. The first driving state allows for heat storage in the structure. The second driving state allows for the complementation and enhancement of radiant air conditioning. [Effects of the Invention]

[0008] According to the present invention, efficient air conditioning can be achieved. [Brief explanation of the drawing]

[0009] [Figure 1] This is an explanatory diagram of an air conditioning system in an embodiment. [Figure 2] This is an explanatory diagram of the system configuration in the embodiment. [Figure 3] This is an explanatory diagram of the hardware configuration in the embodiment. [Figure 4] This is an explanatory diagram of the first mode in the embodiment. [Figure 5] This is an explanatory diagram of the second mode in the embodiment. [Figure 6] This is an explanatory diagram of an air conditioning system in a different example. [Figure 7] This is an explanatory diagram of an air conditioning system in a different example. [Figure 8] This is an explanatory diagram of an air conditioning system in a different example. [Modes for carrying out the invention]

[0010] Using Figures 1 to 5, we will explain the air conditioning system A1 and air conditioning method for adjusting the temperature of the indoor space S1, which is the space to be air-conditioned. As shown in Figure 1, the air conditioning system A1 uses a slab 100 (a structural frame made of cement composition). The slab 100 is composed of concrete material 101 and deck plate 102. The concrete material 101 is concrete poured using a steel deck plate 102 as formwork.

[0011] (Configuration of the radiant panel) Radiant panels 220 are suspended from the deck plate 102 via suspension bolts 211 at a position away from the surface of the deck plate 102. These radiant panels 220 are arranged in a row so as to cover at least a portion of the surface of the slab 100. The radiant panels 220 are positioned at a distance from which the airflow from the fan 223 (described later) can reach the deck plate 102. This distance can be determined according to the airflow performance of the fan 223 (described later), and is, for example, about 10 cm. Specifically, the radiant panels 220 are suspended by fixing them to the suspension bolts 211 with nuts or by using hangers that grip the radiant panels 220.

[0012] The size of the radiant panel 220 is, for example, about 60 cm in width (short side) and 1.5 to 3 m in length (long side), taking into consideration transportation and installation. The entire or partial bottom surface of the radiant panel 220 is provided with ventilation openings 221 made of mesh with multiple holes (openings).

[0013] Furthermore, on the upper surface of the radiation panel 220, pipes 222 arranged in parallel at a predetermined interval are extended so as to be in contact directly or via a heat sink. These pipes 222 are connected to each other between adjacent radiation panels 220. And in the case of cooling, a temperature-controlled fluid always flows through the pipes 222. As the fluid, for example, in the case of cooling, relatively low-potential cold water (e.g., groundwater, etc.) at 15 to 20 °C can be used as air-conditioning cooling water. Note that the fluid may be temperature-controlled using a heat pump or the like so as not to cause condensation.

[0014] Also, between adjacent pipes 222, fans 223 supported by the radiation panel 220 are provided at intervals of a predetermined distance (e.g., several tens of cm). For example, two fans 223 are provided in the width (short side) direction. The fans 223 are detachably attached to the radiation panel 220 by a detaching mechanism (e.g., a clamp, a surface fastener, a magnet, etc.). The fans 223 use fans with a thin thickness, for example, DC cooling fans that can be driven by the USB (Universal Serial Bus) standard (rated voltage: DC5V). These fans 223 are powered from a cable from a cable rack (not shown) through a USB jack and can be switched between forward and reverse rotation according to the voltage.

[0015] As shown in FIG. 4, when heat is stored in the concrete material 101, the fan 223 is rotated forward to perform upward air blowing (first air flow) toward the concrete material 101 side (first mode for heat storage as the first driving state).

[0016] On the other hand, as shown in FIG. 5, when the heat stored in the concrete material 101 is radiated to the interior S1, the fan 223 is rotated in reverse to perform downward air blowing (second air flow) from the concrete material 101 side to the interior S1 side (second mode for heat radiation as the second driving state). As shown in FIG. 2, the fan 223 is driven and controlled by the control device 231. The control device 231 controls the forward and reverse driving according to the switching conditions. The control method can be arbitrarily set according to the environment. For example, the fan 223 may be stopped, and the third mode (radiation mode) of performing radiation air conditioning from the radiation panel 220 may be used.

[0017] (Hardware Configuration) Next, the hardware configuration of the information processing device H10 that constitutes the control device 231 will be described using FIG. 3. The information processing device H10 includes a communication device H11, an input device H12, a display device H13, a storage device H14, and a processor H15. Note that this hardware configuration is an example, and it is also possible to be realized by other hardware.

[0018] The communication device H11 is an interface that establishes a communication path with other devices and executes data transmission and reception, such as a network interface or a wireless interface for example.

[0019] The input device H12 is a device that receives inputs from a user or the like, such as a mouse or a keyboard for example. For example, it receives the set temperature by the user, the declaration of heating or cooling, the direction of the fan, or the necessity of operation. The display device H13 is a display or the like that displays various information. The storage device H14 stores data and various programs for executing the various functions of the control device 231. Examples of the storage device H14 include a ROM, a RAM, a hard disk, and the like.

[0020] The processor H15 controls each process in the control device 231 using the programs and data stored in the storage device H14. Examples of the processor H15 include a CPU, an MPU, and the like for example. This processor H15 expands the programs stored in a ROM or the like into a RAM and executes various processes for each process.

[0021] (Fan Control) The control device 231 is equipped with a timer that outputs the current date and time. The control device 231 then drives the fan 223 according to a schedule (forward rotation or reverse rotation) based on the schedule (temporal conditions) recorded in the storage device H14. The schedule may include, for example, a first mode time zone (nighttime) and a second mode time zone (daytime).

[0022] Furthermore, the control device 231 is connected to a sensor 232 that acquires state information of the indoor space S1 (the space to be air-conditioned). This sensor 232 measures the temperature (room temperature) as state information of the indoor space S1. In addition, it may also measure the radiant temperature of the building structure (concrete material 101). The control device then forces the fan 223 to operate so that the room temperature of the indoor space S1 reaches the target temperature. For example, if the room temperature of the indoor space S1 is higher than the target temperature by an allowable range, and the temperature of the concrete material 101 is lower than the target temperature, the second mode with downward airflow is forced to operate. Furthermore, if the room temperature of the indoor space S1 is lower than the target temperature by an allowable range, and the temperature of the concrete material 101 is higher than the target temperature, the first mode with upward airflow is forced to operate. If the room temperature is stable, the stop mode is executed, which stops the fan 223.

[0023] (action) The fan 223 drives the heat from the radiant panel 220 and the room S1, which is then stored in the concrete material 101. Furthermore, the heat stored in the concrete material 101 is released back into the room S1 through the reverse drive of the fan 223 and radiation.

[0024] According to this embodiment, the following effects can be obtained. (1) In this embodiment, the radiant panel 220 is provided at a position spaced apart from the slab 100. This allows the slab 100 to be used as a heat storage material to provide radiant air conditioning to the room S1. For example, even when the load in the room S1 fluctuates, heat is stored in the concrete material 101 when the load is small, and released when the load is large. This allows the load to be balanced.

[0025] (2) In this embodiment, pipes 222 are arranged in parallel at predetermined intervals on the upper surface of the radiant panel 220 so as to be in contact with it directly or via a heat sink. Unlike the case in which the pipes 222 are embedded in a structure such as a concrete slab, the construction is simpler.

[0026] (3) In this embodiment, fans 223 supported by the radiant panel 220 are provided at predetermined distances (for example, several tens of centimeters). This allows heat storage to be promoted by using the airflow from the fans 223 to the slab 100, even when the slab 100 and the radiant panel 220 are far apart. Furthermore, the airflow from the fans 223 to the room S1 can be used to promote forced convection air conditioning and heat dissipation. Additionally, by using a DC cooling fan that can be driven by the USB standard, airflow can be achieved with a low-power, general-purpose product. Furthermore, the fan 223 is attached to the radiation panel 220 by a detachable mechanism (for example, a clamping mechanism, hook-and-loop fastener, magnet, etc.). This makes it easy to change the position of the fan 223 and to perform maintenance. Furthermore, by providing the piping 222 and fan 223 on the upper surface of the radiant panel 220, flexibility can be ensured on the lower surface on the indoor side.

[0027] (4) In this embodiment, the control device 231 performs scheduled driving (forward rotation, reverse rotation, or stop) of the fan 223. This allows switching between the first mode and the second mode of operation to be made possible by utilizing the periodicity when the heat load of the room S1 changes periodically. For example, hot or chilled water generated by a heat pump, whose temperature has been controlled using nighttime electricity, may be flowed through the pipe 222 to store heat or cool the slab 100.

[0028] Furthermore, the control device 231 is connected to the sensor 232. The control device 231 then uses the measurement information from the sensor 232 to switch the drive mode. This allows the drive mode of the fan 223 to be switched according to the condition of the air-conditioned space and the building structure.

[0029] This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically. In the above embodiment, the piping 222 and fan 223 are provided on the upper surface of the radiant panel 220. The arrangement of the piping 222 and fan 223 is not limited to the upper surface of the radiant panel 220.

[0030] As shown in Figure 6, the fan 223 may be provided on the underside of the radiating panel 220. This makes maintenance of the fan 223 easier. Alternatively, as shown in Figure 7, the pipe 222 may be provided on the underside of the radiating panel 220. This allows the radiating area to be increased by making the pipe 222 function as a fin. Furthermore, as shown in Figure 8, the piping 222 and fan 223 may be provided on the underside of the radiating panel 220. This improves the convenience of maintaining the fan 223 and expands the radiating area.

[0031] In the above embodiment, a sensor 232 is used to measure the temperature (room temperature or radiant temperature) of the space to be air-conditioned or the building structure. The measurement of the state of the air-conditioned section by the sensor 232 is not limited to temperature. For example, a sensor 232 such as a motion sensor may be used to detect the presence of a person. If a person is detected in the space to be air-conditioned, the control device 231 forcibly performs air conditioning control to adjust to reach the target temperature as quickly as possible. On the other hand, if no person is detected, the control device 231, taking power saving into consideration, executes various modes to adjust to reach the target temperature according to other states (e.g., temperature) of the space to be air-conditioned.

[0032] In the above embodiment, a slab 100 using a deck plate 102 is used as the heat storage destination. Here, the deck plate 102 is not essential. Also, the shape of the deck plate 102 is not limited. Furthermore, the structure that stores heat is not limited to the slab 100. For example, a precast concrete floor slab or a concrete slab formed using formwork may be used. Also, any structure (frame) capable of storing heat may be used, such as a concrete wall.

[0033] In the above embodiment, a slab 100 is used as the structure for heat storage. A heat storage material may be placed on the lower surface of the structure. For example, a latent heat storage material (Ecojoule®) may be placed.

[0034] In the above embodiment, a ventilation opening 221 with multiple holes is provided on a part of the lower surface of the radiating panel 220. The mesh is not limited as long as there is ventilation in the area where the fan 223 is placed. For example, a slit may also be used. [Explanation of symbols]

[0035] A1...Air conditioning system, 100...Slab, 101...Concrete material, 102...Deck plate, 211...Suspension bolt, 220...Radiant panel, 221...Ventilation opening, 222...Piping, 223...Fan.

Claims

1. An air conditioning system that uses a space formed by a structure made of cement composition as the space to be air-conditioned, A radiant panel is provided at a position away from the surface of the frame, so as to cover at least a portion of the surface of the frame, and has an opening formed therein. A pipe is installed adjacent to the aforementioned radiant panel and carries a temperature-controlled fluid, An air conditioning system characterized by comprising a fan supported by the radiating panel, which is controlled by switching between a first driving state that forms a first airflow toward the building structure through the opening, a second driving state that forms a second airflow toward the air-conditioned space through the opening, and a stopped state.

2. The air conditioning system according to claim 1, characterized in that the fan is detachably attached to the radiant panel so as to be located between the pipes.

3. The air conditioning system according to claim 1 or 2, characterized in that the piping and the fan are located between the surface of the building structure and the radiant panel.

4. The system further includes a control device for controlling the operation of the aforementioned fan. The air conditioning system according to any one of claims 1 to 3, characterized in that the control device controls the driving of the fan to reverse direction and stop according to the switching conditions.

5. The air conditioning system according to claim 4, characterized in that the switching conditions include time conditions, and the driving of the fan for forward reversal and stopping is controlled based on a predetermined schedule.

6. The air conditioning system according to claim 4 or 5, characterized in that the control device acquires state information of the air-conditioned space from a sensor and controls the driving of the fan to reverse direction and stop based on the state information and the switching conditions.

7. The air conditioning system according to claim 6, characterized in that the sensor measures at least one of the temperature of the space to be air-conditioned and the location of a person in the space to be air-conditioned.

8. An air conditioning method for which the space to be air-conditioned is a space formed by a structure made of cement composition, A radiant panel is provided at a position away from the surface of the frame, so as to cover at least a portion of the surface of the frame, and has an opening formed therein. A pipe is installed adjacent to the aforementioned radiant panel and carries a temperature-controlled fluid, The radiant panel comprises a fan supported by the aforementioned radiant panel, An air conditioning method characterized by controlling the fan by switching between a first driving state in which a first airflow is formed toward the building structure through the opening, a second driving state in which a second airflow is formed toward the space to be air-conditioned through the opening, and a stopped state.

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