JPH1151445A - Radiant air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To first warm temperature of a floor face uniformly by effecting convective air conditioning at the time of starting-up heating air conditioning in an air conditioning system wherein both thermal radiation from a ceiling and convective heat transfer are parallelly employed. SOLUTION: Indoor air sucked through an inlet 5a of an indoor machine is guided to an indoor heat exchanger 7 by an indoor fan (blower) 6 and is divided to a direct outlet 5b and a radiant duct 10 by a damper 9 and a room interior 11 is air-conditioned through both thermal radiation from a radiant panel 10a and convective heat transfer. An outdoor temperature sensor 13 is installed in an outdoor machine 1, an indoor temperature sensor 14 is installed in the inlet 5a of the indoor machine and a radiant temperature sensor 15 and a panel temperature sensor 16 are installed in a ceiling face 11a, and they are connected to a start-up controller 12. The start-up controller 12 controls start-up of operation of an air conditioning system at predetermined air conditioning conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to start-up control of a heating operation in an air-conditioning system for performing cooling or heating by using both heat radiation from a ceiling surface and heat transfer by convection of room air.

[0002]

2. Description of the Related Art Hitherto, a radiant air conditioning system has been proposed in which cooling or heating is performed by using both heat radiation from a ceiling surface and heat transfer by convection of room air. FIG. 11 shows an example of the radiation type air conditioning system. Suction port 5a of indoor unit 5
Is exchanged in the indoor heat exchanger 7 to become cool air or warm air, and the indoor fan 6 switches the damper 9 to change the radiation duct 10 or the direct outlet 5b.
It is blown to. The cool air or warm air sent to the radiation duct 10 transfers heat to the radiation panel 10a forming the ceiling surface 11a, and is blown into the room 11 from the duct outlet 10b.
Radiation air conditioning is performed by heat radiation from the radiation panel 10a, and a small air flow is generated in the room 11 by the cool air or warm air blown out from the duct outlet 10b into the room 11, thereby performing convection air conditioning.

[0003] The heating operation control of this radiation type air-conditioning system is constituted by the respective steps of operation start-up control, radiation / convection combined transfer control, and radiation / convection combined steady control.
The flow of each stage is shown in a flowchart. First, the outdoor and indoor environments are measured based on signals from the outdoor temperature sensor and the room temperature sensor (step 101), and operation start-up control is performed (step 102). When the room temperature sensor detects that the target room temperature has been reached (step 103),
Transition to combined radiation / convection transition control (step 10)
4). When it is determined that the indoor environment has become stable based on the signal from the room temperature sensor (step 105), the routine shifts to the radiation / convection combined steady-state control (step 106).

[0004]

However, in heating and air-conditioning by radiation from the ceiling surface, since the ceiling surface is heated to warm the room, the head of the head is easily lit due to the temperature difference between the vicinity of the ceiling and the vicinity of the floor. In order to maintain and improve indoor comfort, it is necessary to eliminate the difference between the upper and lower temperatures. For this reason, it is necessary to heat the floor more quickly and efficiently before shifting to the combined transfer control of radiation and convection.

FIG. 13 shows the flow of air from the direct outlet 5b. When the air blown out from the direct outlet 5b reaches the floor, it flows toward the inlet 5a of the indoor unit.

FIG. 14 is a flowchart showing a flow of a conventional operation start-up control in heating. First, the indoor environment is measured based on the signal from the room temperature sensor (step 1).
11), convection heating is started (step 112). The angle of the louver is set to 70 °, and air is blown directly from the outlet (step 113). It is determined from the signal from the room temperature sensor whether the room temperature has reached the target temperature (Step 114).
When the temperature reaches the target temperature, the flow shifts to the radiation / convection combined transfer control.

FIG. 15 shows the flow of air when the air outlet angle is directly below the outlet 5b. In this case, the temperature of the floor surface to which the blown air hits increases, and the temperature of the suction port 5a also increases. Therefore, based on a signal from the room temperature sensor installed in the suction port 5a, the control unit determines that the room temperature has become high, and shifts to the combined radiation / convection transfer control. However, since the entire room is not warm, the temperature of the floor surface is low and only the temperature near the ceiling rises, resulting in a vertical temperature difference. If the temperature near the floor is low and the heating operation is strengthened, the temperature near the ceiling will increase, and the temperature difference between the top and bottom will increase, and people in the room will have cold feet and a burning head, making them uncomfortable. become.

An object of the present invention is to provide a radiant air-conditioning system in which convection air-conditioning is performed when heating air-conditioning is started, so that the temperature of the floor surface is uniformly warmed first. And

[0009]

According to a first aspect of the present invention, there is provided a radiant air conditioning system comprising:
In an air conditioning system that performs cooling or heating by using both heat radiation from the ceiling surface and heat transfer by convection of indoor air,
A radiant duct that guides the air conditioned by the indoor heat exchanger to the ceiling surface and conducts heat, a direct outlet that blows the air conditioned by the indoor heat exchanger directly into the room, and the direction of the air that is blown from the direct outlet A louver, a damper for changing the flow of air conditioned by the indoor heat exchanger to the radiant duct and the direct outlet, and a room air suction port for detecting the temperature of the indoor air. A room temperature sensor, and a start-up control unit that starts the heating operation by controlling the damper and the louver according to the room temperature signal from the room temperature sensor, and the start-up control unit sets the louver in advance. When the room temperature signal from the room temperature sensor indicates a preset target temperature, control is performed to change the set angle of the louver to blow air. It has a configuration which is characterized in that.

With the above configuration, the radiant air-conditioning system according to the first aspect of the present invention sets the louver to a predetermined angle and sends conditioned air, and the room temperature signal from the room temperature sensor is set in advance. When the set target temperature is indicated, control is performed to change the louver angle and send air, so the unevenness of the floor surface is reduced, the temperature of the entire room is stabilized, and the operation time until the transition to combined air conditioning is performed. Is reduced.

A radiant air conditioning system according to a second aspect of the present invention is an air conditioning system which performs cooling or heating by using heat radiation from a ceiling surface and heat transfer by convection of indoor air in combination. A radiation duct that guides the conditioned air to the ceiling surface to transfer heat, a direct outlet that blows the conditioned air directly into the room by the indoor heat exchanger, and a louver that changes the direction of the air that is blown out from the direct outlet. A damper that changes the flow of the air conditioned by the indoor heat exchanger to the radiation duct and the direct outlet, a room temperature sensor that is installed at the indoor air suction port and detects the temperature of the indoor air, A start-up control unit that starts the heating operation by controlling the damper and the louver according to a room temperature signal from a room temperature sensor; Until they show target temperature room signal is preset, characterized by blowing the angle of the louver is harmonized with changes continuously agitated air.

With the above configuration, the radiant air conditioning system according to the second aspect of the present invention continuously changes the angle of the louver by swinging until the room temperature signal from the room temperature sensor indicates a preset target temperature. Since the conditioned air is blown while the temperature is uneven, the temperature unevenness of the floor surface is reduced, the temperature of the whole room is stabilized, and the operation time required for shifting to the combined air conditioning is reduced.

According to a third aspect of the present invention, there is provided a radiation type air conditioning system for performing cooling or heating by using heat radiation from a ceiling surface and heat transfer by convection of indoor air in combination with an indoor heat exchanger. A radiation duct that guides the conditioned air to the ceiling surface to transfer heat, a direct outlet that blows the conditioned air directly into the room by the indoor heat exchanger, and a louver that changes the direction of the air that is blown out from the direct outlet. A damper that changes the flow of the air conditioned by the indoor heat exchanger to the radiation duct and the direct outlet, a room temperature sensor that is installed at the indoor air suction port and detects the temperature of the indoor air, A start-up control unit that starts the heating operation by controlling the damper and the louver according to a room temperature signal from a room temperature sensor; Until the room temperature signal indicates a preset target temperature, the angle of the damper is set to a position where both heat radiation from the ceiling surface and heat transfer by convection of room air are used to blow conditioned air. It is characterized by.

With the above arrangement, the radiant air conditioning system according to the third aspect of the present invention adjusts the angle of the damper until the room temperature signal from the room temperature sensor indicates a preset target temperature. Since the conditioned air is blown by setting the position where the radiation and the heat transfer by the convection of the indoor air are used together, the amount of the indoor convection can be increased by the angle of the damper even after the transition to the combined air conditioning.

According to a fourth aspect of the present invention, there is provided a radiant air conditioning system according to any one of the first to third aspects, wherein the radiant air conditioning system further includes means for radiating heat from a ceiling surface. A radiation temperature sensor for detecting a floor surface temperature, wherein the rise control unit detects a ceiling value when a value obtained by adding a correction value to the temperature value detected by the radiation temperature sensor becomes larger than a preset target indoor temperature value; It is characterized in that air conditioning is performed by using both heat radiation from the surface and heat transfer by convection of room air.

According to the above configuration, in the radiation type air conditioning system according to the fourth aspect of the present invention, the value obtained by adding the correction value to the temperature value detected by the radiation temperature sensor is larger than the preset target room temperature value. Then, air conditioning is performed using both heat radiation from the ceiling surface and heat transfer by indoor air convection, so the temperature near the ceiling detected by the room temperature sensor and the temperature of the floor surface detected by the radiation temperature sensor Thus, it is possible to judge the degree of comfort in the room and control the degree of comfort more finely to achieve air conditioning.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of a radiation type air conditioning system according to the present invention. A refrigerant pipe 4 is connected between an outdoor heat exchanger 2 for exchanging heat with outdoor air in an outdoor unit 1 and an indoor heat exchanger 7 for exchanging heat with indoor air in an indoor unit 5.
The refrigerant is circulated at. The indoor air sucked from the suction port 5a of the indoor unit is guided to an indoor heat exchanger 7 by an indoor fan (blower) 6, where the heat is exchanged to become cool air or warm air. The air is switched between the direct outlet 5b and the radiation duct 10 by the damper 9, and the conditioned air (cool air or warm air) is blown into the room 11 from the direct outlet 5b or the duct outlet 10b. At the direct outlet 5b, the air outlet angle is set by the louver 8. The conditioned air is air-conditioned in the room 11 by heat radiation from the radiation panel 10a of the radiation duct 10 and convection heat, and then is sucked into the suction port 5a of the indoor unit again.

The outdoor unit 1 has an outdoor temperature sensor 13 for detecting the outdoor temperature, the indoor unit suction port 5a has a room temperature sensor 14 for detecting the indoor air temperature, and the ceiling surface 11a has a floor surface 11b heated by radiation. And a panel temperature sensor 16 for detecting the temperature of the radiation panel 10a. The start-up control unit 12 is configured by a microcomputer or the like, and performs operation start-up control of the air-conditioning system under preset air-conditioning conditions.

FIG. 2 is a flowchart of the operation start-up control of the radiation type air conditioning system according to the first embodiment of the present invention. First, the angle of the louver is set to 80 °, and air is directly blown out from the outlet 5b (step 1). Then, convection operation start-up control is performed (step 2), and it is determined whether or not the room air temperature (Ta) has reached the target room temperature based on a signal from the room temperature sensor 14 installed at the suction port 5a (step 3). When it reaches, the louver angle is set to 60 ° (step 4), and the convection operation start-up control is performed again (step 5). Then, it is determined whether or not the room air temperature (Ta) has reached the target room temperature + 4 ° C. based on a signal from the room temperature sensor 14 of the suction port 5a (step 6). When the room temperature has reached the target temperature, the louver angle is set to 45 ° ( Step 7), and convection operation start-up control is further performed (step 8). Then, it is determined whether or not the room air temperature (Ta) has reached the target room temperature + 4 ° C. based on a signal from the room temperature sensor 14 of the suction port 5a (step 9).

FIG. 3 shows the state of the direct outlet 5b at each angle of the louver, wherein (a) is 80 ° and (b) is 6 °.
0 ° and (c) show the state at 45 °. (D)
Blows air directly from the outlet 5b at each louver angle,
The change with time of the room temperature when the convection operation is performed is shown.

FIG. 4 shows the flow of blown air when air is blown into the room directly from the outlet 5b at a louver angle of 80 °, that is, at a blow angle of 80 °. FIG. 5 shows the louver angle 6.
This shows the flow of blown air when air is blown into the room directly from the outlet 5b at 0 °, that is, at a blow angle of 60 °. When the outlet angle is changed, the temperature of the suction port 5a drops rapidly, so that the convection operation is continued until the suction air temperature reaches the target temperature again.

FIG. 6 shows a state in which the airflow is changed by changing the blowout angle and the airflow is changed to increase the space to be conditioned. For this reason, the temperature of the entire room is stabilized, the temperature of the floor surface is also increased accordingly, the operation time for shifting to the combined air conditioning is reduced, and the comfortable state of the room can be maintained even after shifting to the combined air conditioning.

FIG. 7 is a flow chart of the start-up control of the radiation type air conditioning system according to the second embodiment of the present invention. In the present embodiment, air conditioning is performed by directly swinging the outlet angle from the outlet 5b, that is, changing the angle of the louver 8 to continuously swing as shown in FIG. First, the angle of the louver is initially set, and the louver 8 is swung to blow air directly from the outlet 5b (step 1).
1). Then, while performing convection heating control (Step 1)
2) It is determined whether the room air temperature (Ta) has reached the target room temperature based on a signal from the room temperature sensor 14 installed in the suction port 5a (step 13). If the room temperature has not reached the target temperature, the louver 8 is swung. While the convection heating control is continued, when the target temperature is reached, the mode shifts to the combined heating mode.

By the way, in the case of a building with poor heat insulation under the floor, heat from radiation from the ceiling escapes through the floor. For this reason, there arises a problem that the room is not heated or a temperature difference between the upper and lower sides is generated.

FIG. 9 shows a third embodiment for coping with this problem, in which the angle of the damper 9 is changed to adjust the air flow rate to the direct outlet 5b and the radiation duct 10, and the combined air conditioning is performed. Even after the shift, the amount of convection in the room is increased by the angle of the damper 9 and the comfort in the room is maintained.

Next, in the radiation type air conditioning system according to the fourth embodiment, the convection air conditioning is performed in order to accelerate the stabilization of the indoor environment, and then the convection air conditioning is performed at the time of start-up. Then, switching control to the combined air conditioning is performed using the room air temperature from the room temperature sensor 14 of the suction port 5a and the floor surface temperature from the radiation temperature sensor 15. That is, by changing the angle of the damper 9, all the conditioned air is led to the radiation duct 10 and the duct outlet 10
b, and is controlled to perform air-conditioning combined with radiation and convection.

FIG. 10 is a flowchart of the operation start-up control of the radiation type air conditioning system according to the fourth embodiment. First, when the start-up control is started, convection air-conditioning control is performed (step 21), and it is determined whether or not the room air temperature (Ta) has reached the target room temperature based on a signal from the room temperature sensor 14 installed in the suction port 5a (step 22). If the target temperature has been reached, it is determined whether the value obtained by adding the correction value to the floor surface temperature from the radiation temperature sensor 15 has reached the target room temperature (step 23). When the temperature reaches the target temperature, the mode shifts to the combined heating mode. When the temperature does not reach the target temperature, the convection heating control is performed again (step 21). If the target temperature is not reached in step 22, it is determined whether the value obtained by adding the correction value to the floor surface temperature from the radiation temperature sensor 15 has reached the target room temperature (step 24). When the temperature reaches the target temperature, the mode shifts to the combined heating mode. When the temperature does not reach the target temperature, the convection heating control is performed again (step 21).

As described above, the relationship can be expressed by an equation: (Ta ≧ target indoor temperature) and (floor surface temperature + correction value <target indoor temperature).
In the case of, the interior space is warmed, but the floor is not sufficiently warmed, so the floor is warmed by convection heating.

(Ta ≧ target room temperature) and (floor surface temperature +
In the case of (correction value ≧ target indoor temperature), since both the indoor space and the floor surface are sufficiently heated, the operation shifts to combined heating.

(Ta <target room temperature) and (floor surface temperature +
In the case of (correction value ≧ target indoor temperature), the indoor space is not warmed, but the floor surface is sufficiently warmed, so the system shifts to combined heating, and the indoor environment is stabilized by radiation from the ceiling.

(Ta <target room temperature) and (floor surface temperature +
If the correction value is smaller than the target indoor temperature, the convection heating is continued because both the indoor space and the floor are not sufficiently heated.

[0033]

As described above, in the radiant air conditioning system according to the first aspect of the present invention, the louver is set at a predetermined angle to blow conditioned air, and the room temperature signal from the room temperature sensor is sent. When を indicates a preset target temperature, control is performed by changing the set angle of the louver and blowing air, so that uneven temperature on the floor surface is reduced, the temperature of the entire room is stabilized, and The operation time can be reduced, and the indoor comfortable state can be maintained even after the transition to the combined air conditioning.

In the radiant air conditioning system according to the second aspect of the present invention, the louvers are continuously rocked and changed until the room temperature signal from the room temperature sensor indicates a predetermined target temperature. Since the air is blown, the temperature unevenness of the floor surface is reduced, the temperature of the entire room is stabilized, the operation time required to shift to the combined air conditioning is reduced, and the comfortable state of the room can be maintained even after the combined air conditioning is shifted.

In the radiation type air conditioning system according to the third aspect of the present invention, the angle of the damper is changed until the room temperature signal from the room temperature sensor indicates a preset target temperature. Since the conditioned air is set at a position where the heat transfer by convection is also used and the conditioned air is blown, the amount of indoor convection can be increased by the angle of the damper even after shifting to the combined air conditioning, and the indoor comfortable state can be maintained.

According to a fourth aspect of the present invention, in the radiant air conditioning system, when a value obtained by adding a correction value to the temperature value detected by the radiant temperature sensor becomes larger than a preset target indoor temperature value, the ceiling surface is conditioned. Air conditioning is performed by using both heat radiation from the room and heat transfer by convection of indoor air, so the indoor temperature is determined by the temperature near the ceiling detected by the room temperature sensor and the temperature of the floor surface detected by the radiation temperature sensor. Air conditioning can be performed by judging the degree of comfort and controlling the degree of comfort more finely.

[Brief description of the drawings]

FIG. 1 is a block diagram of a radiation type air conditioning system of the present invention.

FIG. 2 is a flowchart of operation start-up control of the radiation type air conditioning system according to the first embodiment of the present invention.

3A is a view showing a state of a direct air outlet at a louver angle of 80 °, FIG. 3B is a view showing a state of a direct louver angle at a louver angle of 60 °, and FIG. It is a figure showing a temporal change of room temperature.

FIG. 4 is a diagram showing a flow of blown air at a blow angle of 80 °.

FIG. 5 is a diagram showing a flow of blown air at a blow angle of 60 °.

FIG. 6 is a diagram showing a change in the flow of blown air by changing a blow angle.

FIG. 7 is a flowchart of operation start-up control of the radiation type air conditioning system according to the second embodiment of the present invention.

FIG. 8 is an explanatory diagram of change control for continuously swinging the louver angle.

FIG. 9 is an explanatory diagram for adjusting an air flow rate to a direct outlet and a radiation duct by changing an angle of a damper.

FIG. 10 is a flowchart of operation start-up control of a radiation type air conditioning system according to a fourth embodiment of the present invention.

FIG. 11 is a diagram illustrating an example of a radiation type air conditioning system.

FIG. 12 is a flowchart showing the flow of each stage of heating operation control of the radiation type air conditioning system.

FIG. 13 is a diagram showing a flow of air from a direct outlet.

FIG. 14 is a flowchart showing a flow of conventional operation start-up control in heating.

FIG. 15 is a diagram showing the flow of air when the air blowing angle is directly below the direct outlet.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 outdoor unit 2 outdoor heat exchanger 3 compressor 4 refrigerant pipe 5 indoor unit 5 a suction port 5 b direct outlet 6 indoor fan (blower) 7 indoor heat exchanger 8 louver 9 damper 10 radiation duct 10 a radiation panel 11 indoor 11 a ceiling surface 11b Floor surface 12 Rise control unit 13 Outdoor temperature sensor 14 Room temperature sensor 15 Radiation temperature sensor 16 Panel temperature sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Doi 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Inside of Toshiba Living Space Systems Research Institute (72) Noriko Komoda 8, Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Address Co., Ltd. Toshiba Living Space Systems Research Laboratory

Claims (4)

[Claims] 1. An air conditioning system for performing cooling or heating using both heat radiation from a ceiling surface and heat transfer by convection of indoor air, in which air conditioned by an indoor heat exchanger is guided to the ceiling surface for heat transfer. A radiation duct, a direct outlet that blows the air conditioned by the indoor heat exchanger directly into the room, a louver that changes the direction of the air blown from the direct outlet, and a flow of air that is conditioned by the indoor heat exchanger. A damper for changing a path to the radiation duct and the direct outlet, a room temperature sensor installed at a room air suction port and detecting a temperature of room air, and a damper and a room temperature sensor according to a room temperature signal from the room temperature sensor. Start-up control means for controlling a louver to start a heating operation, and the start-up control means sets the louver to a preset angle to supply conditioned air. And wind, the After shows a target temperature room signal is set in advance from the temperature sensor, radiant air-conditioning system which is characterized in that the control of blowing by changing the setting angle of the louver. 2. An air conditioning system for performing cooling or heating using both heat radiation from a ceiling surface and heat transfer by convection of indoor air, in which air conditioned by an indoor heat exchanger is guided to the ceiling surface for heat transfer. A radiation duct, a direct outlet that blows the air conditioned by the indoor heat exchanger directly into the room, a louver that changes the direction of the air blown from the direct outlet, and a flow of air that is conditioned by the indoor heat exchanger. A damper for changing a path to the radiation duct and the direct outlet, a room temperature sensor installed at a room air suction port and detecting a temperature of room air, and a damper and a room temperature sensor according to a room temperature signal from the room temperature sensor. And a start-up control means for controlling a louver to start a heating operation, wherein the start-up control means indicates a preset target temperature based on a room temperature signal from the room temperature sensor. Until, radiant air-conditioning system, characterized in that for blowing angle of the louver is harmonized with changes continuously agitated air. 3. An air conditioning system that performs cooling or heating by using heat radiation from a ceiling surface and heat transfer by indoor air convection in combination, wherein air conditioned by an indoor heat exchanger is guided to the ceiling surface to transfer heat. A radiation duct, a direct outlet that blows the air conditioned by the indoor heat exchanger directly into the room, a louver that changes the direction of the air blown out from the direct outlet, and a flow of air conditioned by the indoor heat exchanger. A damper for changing a path to the radiation duct and the direct outlet, a room temperature sensor installed at a room air suction port and detecting a temperature of room air, and a damper and a room temperature sensor according to a room temperature signal from the room temperature sensor. And a start-up control means for controlling a louver to start a heating operation, wherein the start-up control means indicates a preset target temperature based on a room temperature signal from the room temperature sensor. Until, radiant air-conditioning system, characterized in that for blowing angle of the damper, the heat radiation and air that has been harmonized set to a position where a combination of heat transfer by convection of room air from the ceiling surface. 4. A radiant temperature sensor for detecting a floor surface temperature due to heat radiation from a ceiling surface, wherein the rise control means sets a value obtained by adding a correction value to a temperature value detected by the radiant temperature sensor in advance. 4. The air conditioner according to any one of claims 1 to 3, wherein when the temperature exceeds the target indoor temperature value, air conditioning is performed by using both heat radiation from the ceiling surface and heat transfer by convection of the indoor air. Radiant air conditioning system.