JP2012088010A - Temperature difference air conditioning using cool air in roof space of radiation air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature difference air conditioning using cool air in roof space of radiation air conditioning system, though being inexpensive, capable of dissolving such a weak point that the effect on cooling is moderate.SOLUTION: The temperature difference air conditioning using cool air in roof space of radiation air conditioning system in which the air conditioning in a room R is performed by means of radiation heat from a radiation panel 14 disposed on a ceiling 12 in the room R includes an introduction means 16 for introducing cool air in a roof space generated by radiation cold from the radiation panel 14 into the room R. The introduction means 16 comprises communication ports 18, 20 which communicate the inside of the room R and the roof space with each other and introduces the cool air of the roof space into the room R by using a natural convection S produced by a temperature difference.

Description

  The present invention relates to a temperature difference air-conditioning system using cold air from the ceiling of a radiant air-conditioning system having a radiant panel on the indoor ceiling.

  2. Description of the Related Art Conventionally, in a building air conditioning system, a radiant air conditioning system that heats and cools a room by radiant heat from a radiant panel provided on a ceiling portion is becoming widespread (for example, see Patent Document 1). This radiant air-conditioning system has a feeling of airflow and is excellent in comfort, but also has a weak point of 'effective effect' because there is no airflow. For this reason, normally, when a radiation panel system is adopted, this weakness is compensated by using an air conditioner, a fan coil, etc. in addition to the radiation panel.

JP 2003-343991 A

  By the way, if auxiliary air conditioning such as a fan coil is separately provided in order to eliminate the weak point of the radiant air conditioning system, which is 'moderately effective', the cost is increased by the initial cost. For this reason, there has been a demand for the development of an inexpensive cooling technology that can eliminate the weaknesses of the radiant air conditioning system without separately providing auxiliary air conditioning such as a fan coil.

  The present invention has been made in view of the above, and provides a temperature difference air-conditioning system that uses cold air from the ceiling of a low-cost radiation air-conditioning system that eliminates the weakness of the radiation air-conditioning system that is 'moderate' during cooling. For the purpose.

  In order to solve the above-described problems and achieve the object, the temperature difference air conditioning using the ceiling back air of the radiant air conditioning system according to claim 1 of the present invention is based on the radiant heat from the radiant panel provided on the indoor ceiling. A temperature difference air-conditioning system using cold air from the ceiling of a radiant air-conditioning system that performs indoor air-conditioning, and provided with introducing means for introducing cold air from the ceiling back generated by radiant cold heat from the radiant panel into the room Features.

  Further, the temperature difference air conditioning using the ceiling back air of the radiation air conditioning system according to claim 2 of the present invention is the above-described temperature difference air conditioning system according to claim 1, wherein the introducing means uses natural convection due to the temperature difference. Cold air is introduced into the room.

  Moreover, the temperature difference air-conditioning using the ceiling back air of the radiation air-conditioning system according to claim 3 of the present invention is the above-described claim 1 or 2, wherein the introduction means is provided on the ceiling, and the room and the ceiling are provided. It consists of a communication port that communicates with the back.

  Moreover, the temperature difference air-conditioning using the ceiling back air of the radiant air-conditioning system according to claim 4 of the present invention is the above-described temperature difference air-conditioning system according to claim 3, wherein the introduction means is provided in the room and a damper that opens and closes the communication port. And a temperature sensor for controlling the opening and closing of the damper based on a signal from the temperature sensor.

  Moreover, the temperature difference air-conditioning using the ceiling back air of the radiation air-conditioning system according to claim 5 of the present invention is the above-described claim 3 or 4, wherein the introduction means includes a damper that opens and closes the communication port, and the room The switch is provided on the switch, and the opening / closing of the damper is controlled based on a signal of the switch operation by the user.

  Moreover, the temperature difference air conditioning using the ceiling back cold of the radiation air conditioning system which concerns on Claim 6 of this invention WHEREIN: In any one of Claim 3-5 mentioned above, the said communicating port was provided in the window side, It is characterized by the above-mentioned. And

  Moreover, the temperature difference air-conditioning using the ceiling back air of the radiation air-conditioning system according to claim 7 of the present invention is the above-described communication port according to any one of claims 3 to 6 provided on the window side and the opposite side. It is characterized by that.

  According to the present invention, the temperature difference air-conditioning system uses cold air from the ceiling of a radiant air-conditioning system that performs air-conditioning of the room by radiant heat from a radiant panel provided on an indoor ceiling, and is generated by radiant cold heat from the radiant panel. In addition, since the introduction means for introducing the cold air from the ceiling back into the room is provided, the indoor air conditioning can be performed by effectively using the cold air from the ceiling back. For this reason, it is not necessary to separately provide auxiliary air conditioning such as a fan coil in order to eliminate the weak point of the radiant air conditioning system, which is ‘moderately effective’ at the time of cooling, and this does not cause an increase in cost. Therefore, there is an effect that it is possible to provide temperature difference air-conditioning that uses cold air from the ceiling of an inexpensive radiation air-conditioning system.

FIG. 1 is a perspective view showing an embodiment of temperature difference air conditioning using cold air behind the ceiling of the radiant air conditioning system according to the present invention. FIG. 2 is a side view showing an embodiment of temperature difference air conditioning using the ceiling back air of the radiant air conditioning system according to the present invention. FIG. 3 is a side view showing another embodiment of the temperature difference air-conditioning using the cold air in the ceiling of the radiant air-conditioning system according to the present invention. FIG. 4 is a diagram illustrating motor damper open / close control by the temperature sensor. FIG. 5 is a diagram illustrating motor damper open / close control by a switch. FIG. 6 is a plan view showing a model room of pattern A. FIG. FIG. 7 is a side view showing a model room of pattern A. FIG. FIG. 8 is a plan view showing a model room of pattern B. FIG. FIG. 9 is a side view showing a model room of pattern B. FIG. FIG. 10 is a graph showing the change over time of the measured temperature of pattern A. FIG. FIG. 11 is a graph showing the change over time of the measured temperature of pattern B. FIG.

  DESCRIPTION OF EMBODIMENTS Embodiments of temperature difference air conditioning that uses cold air from the ceiling of a radiant air conditioning system according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  Since the radiant panel installed on the ceiling exhibits air conditioning capability not only in the downward direction but also in the upward direction, cold air from the radiant cooling heat from the radiant panel accumulates on the back of the ceiling during cooling. The present invention is intended to make up for the weakness of the radiant air-conditioning system, which is 'moderately effective', by effectively using the cold air accumulated in the ceiling.

  As shown in FIG. 1, a temperature difference air conditioner 10 using cold air from the ceiling of a radiant air conditioning system according to the present invention performs air conditioning of a room R by radiant heat from a radiant panel 14 provided on a ceiling 12 of the room R. In addition, there is provided an introducing means 16 for introducing the cold air behind the ceiling generated by the radiant cold heat from the radiant panel 14 into the room R.

  The introducing means 16 includes a long hole-like cold air outlet 18 (communication opening) and an indoor air suction opening 20 (communication opening) provided in the ceiling 12 so as to communicate the room R with the back of the ceiling. The cold air behind the ceiling is introduced into the room R, and the indoor air is sucked into the ceiling through the suction port 20. As for the cold air blowing down from the ceiling to the room R, natural convection S due to temperature difference is used. This convection works as auxiliary air conditioning in the room.

  As described above, according to the present invention, since the indoor air conditioning is performed by effectively using the cold air behind the ceiling, in order to eliminate the weak point of the radiant air conditioning system that is 'effective in cooling', such as a fan coil There is no need to provide auxiliary air conditioning. Accordingly, the initial cost associated with the introduction of the auxiliary air conditioning equipment can be reduced, and temperature difference air conditioning using the cold air behind the ceiling of the inexpensive radiant air conditioning system can be provided.

  The following two patterns can be considered as the air flow in the room R due to the introduction of cool air behind the ceiling, depending on the positions of the air outlet 18 and the air inlet 20. As shown in FIG. 2, the suction port 20 is provided on the perimeter side P (window side) and the blowout port 18 is provided on the indoor side Q, so that natural convection S is formed in the entire room including the back of the ceiling. It is.

  As shown in FIG. 3, the suction port 20 and the blowout port 18 are arranged close to each other only on the perimeter side P, so that local natural convection S1 is formed on the perimeter side P. By doing so, the air conditioning load on the perimeter side P can be more reliably reduced. In addition, a partition wall 22 having an upper opening is provided in the back of the ceiling between the suction port 20 and the blowout port 18 that are arranged close to each other to facilitate the formation of natural convection S1.

The opening and closing of the suction port 20 and the blowout port 18 can be controlled by a temperature sensor or the like.
For example, as shown in FIG. 4, a motor damper MD that opens and closes the suction port 20 and the blowout port 18 and a temperature sensor T that detects the room temperature are provided, and the opening and closing of the motor damper MD is controlled based on a signal from the temperature sensor T. . The temperature sensor T may be arranged on the perimeter side P. When a certain temperature is detected, the motor damper MD may be opened and the cold air behind the ceiling may be blown down into the room R from the outlet 18.

  For example, as shown in FIG. 5, a switch SW may be provided on the indoor side Q, and the opening / closing of the motor damper MD may be controlled based on an on / off operation signal of the switch SW by a user in the room R. If it does in this way, the cool air of a ceiling back can be immediately blown down to room R according to a user's needs.

Next, experimental results verifying the effects of the present invention will be described.
As shown in FIGS. 6 and 7, this experiment is performed by introducing cold air behind the ceiling with the motor dampers of the suction port 20 and the blowout port 18 opened from the closed state in a rectangular parallelepiped model room equipped with the radiation panel 14. This is a study of the change in room temperature over time. Cold water of about 18 to 20 ° C. is always allowed to flow through the meandering pipe 24 in the radiation panel 14, and rubber heaters 26 and 28 with an output of 500 W are installed and operated in the model room as a perimeter simulated load and an interior simulated load. . Temperature measurement points were set at four locations in the vertical direction on the perimeter side (P1 to P4), the center side (M1 to M4), and the interior side (Q1 to Q4) and the interior N1 of the ceiling.

  The model room examination pattern includes the pattern A (see FIGS. 6 and 7) in which the suction port 20 is provided on the perimeter side and the outlet 18 on the interior side, and the suction port 20 and the outlet 18 on the perimeter side. The provided pattern B (see FIGS. 8 and 9) was set.

  10 and 11 show the change over time of the measured temperatures of the patterns A and B. FIG. Each curve shows the average value of each of the four vertical directions on the perimeter side, the center side, and the interior side, and the temporal change in the temperature inside the ceiling.

  As shown in FIGS. 10 and 11, in both patterns, the temperature in the model room has decreased from the start of cold air introduction when the motor damper is closed to open (approximately 0.6 to 0.7 ° C.), and the back of the ceiling It can be seen that the cold air functions as auxiliary air conditioning in the model room. In addition, it can be seen that the cooling heat accumulated in the ceiling becomes zero in about 30 minutes from the start of cold air introduction, and the temperatures in the model room and the ceiling are stabilized.

  As described above, according to the present invention, the temperature difference air-conditioning system uses cold air from the ceiling of a radiant air-conditioning system that performs air-conditioning of the room by radiant heat from a radiant panel provided on the ceiling of the room, the radiant panel. Since the introduction means for introducing the cold air from the ceiling generated by the radiant cooling heat from the room into the room is provided, the cold air from the ceiling can be effectively used to perform indoor air conditioning. For this reason, it is not necessary to separately provide auxiliary air conditioning such as a fan coil in order to eliminate the weak point of the radiant air conditioning system, which is ‘moderately effective’ at the time of cooling, and this does not cause an increase in cost. Therefore, it is possible to provide temperature difference air conditioning that uses the cold air from the ceiling of an inexpensive radiant air conditioning system.

  As described above, the temperature difference air conditioning using the cooling air behind the ceiling of the radiant air conditioning system according to the present invention is useful for the radiant air conditioning system in which a radiant panel is provided on the ceiling part, and in particular, 'moderate' during cooling. It is suitable for solving the weak points of the radiation air conditioning system.

10 Temperature difference air conditioning using cold air behind the ceiling of a radiation air conditioning system 12 Ceiling 14 Radiation panel 16 Introduction means 18 Air outlet (communication port)
20 Suction port (communication port)
22 Partition wall MD Motor damper T Temperature sensor SW Switch R Indoor P Perimeter side (window side)
Q Indoor side

Claims (7)

It is a temperature difference air conditioning that uses cold air behind the ceiling of a radiation air conditioning system that performs air conditioning of the room by radiant heat from a radiation panel provided on the ceiling of the room,
A temperature difference air conditioner using ceiling back cold of a radiant air conditioning system, characterized in that an introduction means is provided for introducing cold air from the ceiling generated by radiation cold heat from the radiation panel into the room.   The temperature difference air conditioner using the ceiling back cold air of the radiant air conditioning system according to claim 1, wherein the introduction means introduces the cold air behind the ceiling into the room using natural convection due to a temperature difference.   The temperature difference using the ceiling back cold of the radiant air-conditioning system according to claim 1 or 2, wherein the introduction means includes a communication port that is provided on the ceiling and connects the room and the ceiling back. air conditioning.   The said introduction means is provided with the damper which opens and closes the said communication port, and the temperature sensor provided in the said room, The opening and closing of the said damper is controlled based on the signal of the said temperature sensor. Temperature difference air conditioning using cold air behind the ceiling of the radiant air conditioning system.   The said introduction means includes a damper that opens and closes the communication port and a switch provided in the room, and controls the opening and closing of the damper based on a signal of the switch operation by a user. 4. Temperature difference air conditioning using the ceiling back cold of the radiation air conditioning system according to 4.   The temperature difference air conditioning using cold air from the ceiling of the radiant air conditioning system according to any one of claims 3 to 5, wherein the communication port is provided on a window side.   The temperature difference air-conditioning using the ceiling back cold of the radiation air-conditioning system according to any one of claims 3 to 6, wherein the communication port is provided on the window side and the opposite side.

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