JP2000234774A - Indoor air-circulating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always enable a blower to be operated so that a user does not have to start or stop operating the blower by operating and controlling the blower based on the change in indoor temperature being detected by a temperature sensor using a controller. SOLUTION: A blower 6 is mounted to the inside of a duct 1, a lower indoor temperature sensor 9 is mounted to the lower portion of the duct 1, and an upper indoor temperature sensor 10 is mounted to the upper portion of the duct 1. An indoor lower-layer temperature T1 near the floor in a room being detected by the lower indoor temperature sensor 9 and an upper-layer temperature T2 in the room near the ceiling of the room being detected by the upper indoor temperature sensor 10 are inputted to a controller 13. The controller 13 outputs the start signal of an electric motor 7 when the indoor upper-layer temperature T2 is higher than the indoor lower-layer temperature T1 by at least a set temperature, thus driving the electric motor 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor air circulating apparatus for circulating indoor air by sucking air near a floor in a room and blowing it out near a ceiling.

[0002]

2. Description of the Related Art When a heating device is used in a room, the air heated by the heating device causes an updraft and stays near the ceiling in the room. It took a long time to warm up close. In order to solve this, actual opening 57-
As disclosed in Japanese Patent Publication No. 137939, there has been proposed an indoor air circulation device that circulates indoor air by sucking air near a floor in the room and blowing it out near the ceiling.

With the use of the above-described indoor air circulation device, the room near the floor is heated in a short time, and the temperature difference between the room near the ceiling and the room near the floor can be eliminated, and the temperature distribution in the upper and lower layers in the room can be made uniform. . Therefore, by using the indoor air circulation device, not only the indoor comfort is improved, but also the temperature distribution in the upper and lower layers of the room is made uniform, so that heating equipment is not used more than necessary, thereby saving energy and improving economic efficiency.

[0004]

The above-described indoor air circulation device is provided with a blower in a hollow main body having an intake port and an outlet, and a user turns on and off an operation switch to drive and stop the blower. It is a shape to run and stop operation.
For this reason, the user checks the temperature difference between the temperature near the ceiling in the room and the temperature near the floor and turns on and off the operation switch, so that the operation is troublesome and the user sometimes forgets the operation. Further, it is conceivable that the user starts the operation by turning on the operation switch at the same time as the use of the heating appliance. However, even in this case, the operation switch must be turned on and the operation may be forgotten.

[0005] Therefore, an object of the present invention is to provide an indoor air circulation device capable of solving the above-mentioned problems.

[0006]

According to a first aspect of the present invention, there is provided a duct 1 having an intake port 2 at a lower portion and an outlet 4 at an upper portion,
The air conditioner includes a blower 6 mounted in the duct 1, a controller 13 for controlling the operation of the blower 6, and a temperature sensor for detecting an indoor temperature. The indoor air circulation device is characterized by controlling the operation of the indoor air circulation device.

According to a second aspect of the present invention, there is provided a duct 1 having an intake port 2 at a lower portion and an air outlet 4 at an upper portion, a blower 6 mounted in the duct 1, a controller 13 for controlling the operation of the blower 6, and a room. A lower room temperature sensor 9 for detecting a lower layer air temperature, and an upper room temperature sensor 10 for detecting an upper layer air temperature of the room.
Is a first function for starting operation of the blower 6 when the upper air temperature of the room detected by the upper room temperature sensor 10 is higher than the lower air temperature of the room detected by the lower room temperature sensor 9 by a first set temperature and a blower. 6 has a second function of stopping the operation of the blower 6 when the temperature drop of the upper air temperature of the room or the lower air temperature of the room is equal to or higher than a second set temperature after the start of operation. It is.

According to a third aspect of the present invention, there is provided a duct 1 having an intake port 2 at a lower portion and an air outlet 4 at an upper portion, a blower 6 mounted in the duct 1, and a damper 20 communicating and closing the inside of the duct 1. A controller 13 for controlling the blower 6 and the damper 20, a duct temperature sensor 23 for detecting the temperature in the duct 1, and an indoor temperature sensor 24 for detecting the indoor temperature.
Indicates that the indoor temperature detected by the indoor temperature sensor 24 is a first time lower than the duct temperature detected by the duct temperature sensor 23.
The operation of the blower 6 is started when the temperature is higher than the set temperature, and the first function of making the damper 20 communicate with the air blower 6 and the blower 6 is operated when the temperature drop of the indoor temperature or the duct temperature is equal to or higher than the second set temperature. An indoor air circulation device characterized by having a second function of stopping and closing the damper 20.

According to a fourth aspect of the present invention, there is provided a duct 1 having an intake port 2 at a lower portion and an air outlet 4 at an upper portion, a blower 6 mounted in the duct 1, a controller 13 for controlling the blower 6, 1, a temperature sensor 23 in the duct attached so as to make less contact with the flowing air.
And a room temperature sensor 24 for detecting a room temperature, wherein the controller 13 is configured such that the room temperature detected by the room temperature sensor 24 is higher than the first temperature set by the duct temperature detected by the temperature sensor 23 inside the duct. A room having a first function of starting the operation of the blower 6 at a time and a second function of stopping the operation of the blower 6 when the temperature drop of the indoor temperature or the temperature in the duct is equal to or higher than a second set temperature. It is an air circulation device.

According to a fifth aspect of the present invention, there is provided a duct 1 having an intake port 2 at a lower portion and an air outlet 4 at an upper portion, a blower 6 mounted in the duct 1, a controller 13 for controlling the blower 6, 1, a closed space 35 is formed, and a duct temperature sensor 23 mounted in the space 35 and an indoor temperature sensor 2 for detecting the indoor temperature.
A first function of starting operation of the blower 6 when the indoor temperature detected by the indoor temperature sensor 24 is higher than the duct temperature detected by the duct temperature sensor 23 by a first set temperature or more. And a second function of stopping the operation of the blower 6 when the indoor temperature is lower than the duct internal temperature by a third set temperature or more.

[0011]

According to the first aspect of the present invention, the blower 6 is automatically controlled based on a change in the indoor temperature. Therefore, for example, when the indoor temperature rises due to the start of use of a heating device, the operation of the blower 6 is started. The operation of the blower 6 can be stopped when the indoor temperature is lowered by stopping the use of the heater.

[0012] Therefore, the blower 6 can be automatically started and stopped by starting and stopping the use of the heating appliance, so that the user does not need to start and stop the blower 6, so that troublesome operation is required. It becomes unnecessary and the operation of the blower 6 is not forgotten.

According to the second invention, when the upper air temperature in the room becomes higher than the lower air temperature in the room by the first set temperature or more by the start of use of the heating device, the blower 6 automatically starts operating. When the upper air temperature in the room or the lower air temperature in the room drops below the second set temperature by stopping the use of the heating device after the blower 6 starts operating, the blower 6 automatically stops operating.

Therefore, troublesome operation by the user is not required, and the operation is not forgotten.

According to the third aspect, when the blower 6 is stopped, the damper 20 is in the closed state, and no air flows through the duct 1. When you start using the heater, duct 1
Since the room temperature rises without increasing the inside temperature, the room temperature becomes higher than the first set temperature in the duct in a short time after the use of the heating device is started, and the heating device is started to be used. , The blower 6 starts operating in a short time.

When the use of the heater is stopped, the indoor temperature or the temperature in the duct falls. When the temperature drops below the second set temperature, the blower 6 stops operating, and the damper 20 is closed at the same time.

Therefore, a troublesome operation by the user is unnecessary, and the operation is not forgotten. In addition, since the blower 6 starts operating in a short time after the use of the heating device and the damper 20 is in communication at the same time, the temperature distribution of the upper and lower layers of the room is uniform in a short time after the use of the heating device is started. Can be

According to the fourth aspect of the present invention, since the temperature sensor 23 in the duct is hardly affected by the temperature of the air flowing through the duct 1, even if the heater starts to be used and the air flows through the duct 1, The temperature detected by the internal temperature sensor 23 rises slowly. As a result, when the heating device is started to be used, the temperature detected by the temperature sensor 23 in the duct slowly rises, and the temperature detected by the room temperature sensor 24 rises quickly. The temperature detected by the sensor 24 becomes higher than the temperature detected by the in-duct temperature sensor 23 by the first set temperature or more, and the operation of the blower 6 is started in a short time after the use of the heating appliance is started.

When the use of the heater is stopped, the indoor temperature and the temperature in the duct decrease. When the temperature drops below the second set temperature, the blower 6 stops operating.

Therefore, troublesome operation of the user is not required, and the operation is not forgotten. In addition, since the operation of the blower 6 is started in a short time after the use of the heating device is started, the temperature distribution of the upper and lower layers in the room can be made uniform in a short time after the use of the heating device.

According to the fifth aspect of the present invention, the temperature sensor 23 in the duct is hardly affected by the temperature of the air flowing through the duct 1. The temperature detected by the internal temperature sensor 23 rises slowly. As a result, when the heating device is started to be used, the temperature detected by the temperature sensor 23 in the duct slowly rises, and the temperature detected by the room temperature sensor 24 rises quickly. The temperature detected by the sensor 24 becomes higher than the temperature detected by the in-duct temperature sensor 23 by the first set temperature or more, and the operation of the blower 6 is started in a short time after the use of the heating appliance is started.

When the use of the heater is stopped, the room temperature drops rapidly, but the temperature in the closed space 35 drops slowly. Therefore, the room temperature is lower than the duct temperature detected by the duct temperature sensor 23. When the temperature becomes lower than the set temperature of 3, the blower 6 stops operating.

Therefore, a troublesome operation by the user is unnecessary, and the operation is not forgotten. In addition, since the operation of the blower 6 is started in a short time after the use of the heating device is started, the temperature distribution of the upper and lower layers in the room can be made uniform in a short time after the use of the heating device. Further, since the duct temperature sensor 23 is mounted in the closed space 35, dirt in the air flowing through the duct does not adhere. As a result, the temperature in the duct can be accurately detected over a long period of time.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an intake port 2 is formed in a lower portion of a duct 1 having a hollow ventilation path, and a filter 3 is attached to the intake port 2. An outlet 4 is formed in the upper part of the duct 1, and a louver 5 is attached to the outlet 4. The louver 5 may be a fixed type or a variable type having a variable angle. A blower 6 is mounted in the duct 1, and the blower 6 rotates a fan 8 with an electric motor 7 to flow air in the direction of arrow a. A lower room temperature sensor 9 is mounted below the duct 1 and an upper room temperature sensor 10 is mounted above the duct 1.

The duct 1 is installed near a wall in a room or the like. The intake port 2 is near the floor 11 and the outlet 5 is near the ceiling 12.

[0026] The lower indoor temperature in the room detected by the sensor 9 floor near the indoor lower temperatures T ₁ and the upper interior temperature sensor 10 indoor detected in the ceiling near the indoor upper temperature T ₂ is the controller 13, as shown in FIG. 2 Respectively. The controller 13 when the indoor upper temperature _{T 2} is higher than the set temperature than the room lower temperature _{T 1} (i.e. _T 2 -T
_When the temperature difference is equal to or more than the set temperature, a start signal for the electric motor 7 is output to drive the electric motor 7.

As described above, the interior of the room is started to be heated by using the heating device, and the upper layer temperature T ₂ near the ceiling in the room.
There becomes higher set temperature or higher than the floor near the indoor lower temperature T ₁ of the chamber, the electric motor 7 is the blower 6 starts automatically operated to start. Thereby, the air near the floor in the room is sucked in from the air inlet 2 and blown out from the outlet 4 near the ceiling, so that the temperature distribution of the upper and lower layers in the room can be made uniform in a short time.

Next, the above-mentioned operation will be specifically described with reference to the chart shown in FIG. Start using heaters (start heating)
Then, the indoor lower layer temperature T ₁ is almost constant and the indoor upper layer temperature T ₂
Sequentially rises, and when T ₂ −T ₁ becomes equal to or higher than the first set temperature X ₁ , the controller 13 confirms the start of use of the heating device, starts the electric motor 7, and automatically starts the operation of the blower 6.

As a result, the air near the indoor floor and the air near the indoor ceiling are mixed, and the temperature of the air near the indoor floor (indoor lower layer temperature T ₁ ) sequentially increases, so that the temperature distribution in the upper and lower layers of the room becomes uniform. .

The aforementioned T ₂ -T ₁ is the first set temperature X
After the temperature becomes ₁ (for example, 5 ° C.) or more, the controller 13 measures the temperature drop (temperature drop) of the indoor lower layer temperature T ₁ every predetermined time t ₁ (for example, 5 minutes). This indoor lower layer temperature T ₁
When the temperature decrease becomes equal to or higher than the second set temperature X ₂ (for example, 5 ° C.), the controller 13 confirms that the use of the heating device is stopped, stops the electric motor 7, and automatically stops the operation of the blower 6.

That is, when the indoor heating is stopped by stopping the use of the heating equipment, the indoor lower temperature T ₁ and the indoor rising temperature T ₂ decrease, so that the indoor lower temperature T ₁ is lower by a predetermined time t ₁ than the indoor lower temperature T ₁ before the predetermined time t _1. indoor lower temperatures T ₁ and after ₁ decreases. Then, shutting down the blower 6 when the temperature drop becomes the second set temperature X ₂ or less.

[0032] It should be noted that the predetermined time t ₁ the temperature drop of each of the indoor upper temperature T ₂ may be operated stop fan 6 when the second predetermined temperature X ₂ or less. Also, temperature drop of each of the predetermined time t ₁ may be a maximum value of the temperature difference between the predetermined time t ₁ before and after may be the temperature difference between the average temperature between the predetermined time t _1, it can be determined in design is there.

Next, a second embodiment will be described. As shown in FIG. 4, the damper 20 is attached in the middle of the ventilation path of the duct 1. The damper 20 is an electric motor 2 for a damper.
1, the valve 22 is swung to communicate and close the duct 1 passage. A duct temperature sensor 23 is mounted in the duct 1 at a position closer to the outlet 4 than the damper 20. The room temperature sensor 24 is mounted on the upper part of the duct 1.

As shown in FIG. 5, the electric motor 21 for the damper is driven and controlled by the controller 13. Specifically, when the controller 13 starts the electric motor, the damper electric motor 21 is started to set the valve 22 to the communication position shown by the solid line in FIG. 4, and when the electric motor 7 is stopped, the damper electric motor 21 is started. The valve 22 is brought to the closed position shown by a virtual line in FIG. The electric motor 7 of the blower 6 is energized when the temperature difference between the indoor temperature detected by the indoor temperature sensor 24 and the temperature in the duct detected by the temperature sensor 23 in the duct becomes higher than a first set temperature.
Is started, and when the temperature decrease of the room temperature or the duct internal temperature becomes equal to or higher than the second set temperature, the energization of the electric motor 7 is stopped, and the operation of the blower 6 is stopped.

In this manner, when the blower 6 is stopped, the damper 20 is closed and the duct 1 is closed.
Does not flow through the inside of the duct 1 (ventilation path), so even if the use of the heating apparatus is started, the air is not circulated inside the duct 1 due to the convection of air and the warm air blowing from the heating apparatus.

Accordingly, the temperature inside the duct 1 is maintained for a long time before the use of the heater. as a result,
Since the temperature in the duct does not rise even if the temperature in the room (upper room temperature T ₂ ) rises due to heating, the room temperature (upper room temperature) detected by the above-mentioned room temperature sensor 24 and the temperature detected by the duct temperature sensor 23 are detected. The temperature difference between the temperatures in the duct becomes the first set temperature in a short time from the start of using the heating device.

From this, it is possible to detect in a short time that the use of the heating apparatus has been started, whereby the damper 20 is brought into a communicating state, the blower 6 is started to operate, and the air near the floor in the room is removed from the ceiling. By blowing out and circulating nearby, the temperature distribution of the upper and lower layers in the room can be made uniform. Therefore, the temperature distribution of the upper and lower layers in the room can be made uniform in a short time after the use of the heating appliance is started.

Further, it is possible to mount the indoor temperature sensor 24 and the duct temperature sensor 23 at substantially the same position in the vertical direction of the room. As a result, the electric wiring can be shortened, the construction is easy, and the cost is low. In addition, noise and the like are hardly picked up due to short electric wiring, so that malfunction does not occur.

Next, a third embodiment will be described. As shown in FIG. 6, a box body 30 having a closed lower surface, a front surface, and both side surfaces and an open upper surface is attached in the duct 1 to form a space 31 having an open upper surface in the duct 1. The duct temperature sensor 23 is mounted.

Further, as shown in FIG. 7, an S-shaped tube 32 is vertically mounted in the duct 1 to form a wave-shaped space 33, and the temperature sensor 23 in the duct is mounted in the space 33. In the case shown in FIGS. 6 and 7, the operation of the electric motor 7 of the blower 6 is started and stopped similarly to the above-described second embodiment.

6 and 7, the air flowing through the duct 1 is affected by the convection of air due to heat and the warm-up blowout from the heating device when the heating device is started to be used. , 33, and the air flowing through the duct 1 is less likely to come into contact with the duct temperature sensor 23.

As a result, the temperature detected by the indoor temperature sensor 24 immediately rises when the heater starts to be used, but the temperature detected by the temperature sensor 23 in the duct gradually increases. The temperature difference between the indoor upper layer temperature) and the duct indoor temperature detected by the duct internal temperature sensor 23 becomes the first set temperature in a short time from the start of use of the heating appliance.

Accordingly, the start of the use of the heating device is detected in a short time, and the operation of the blower 6 is started, and the air near the floor in the room is blown out and circulated near the ceiling. The temperature distribution of the upper and lower layers in the room can be made uniform in a short time.

As described above, when the temperature distribution of the upper and lower layers in the room is made uniform and the heater is continuously used, the temperature detected by the temperature sensor 23 in the duct is substantially the same as the temperature detected by the room temperature sensor 24. . When the use of the heater is stopped in this state, the temperature of the room and the temperature of the duct fall substantially uniformly.

Therefore, when the temperature drop of the room temperature detected by the room temperature sensor 24 or the temperature drop in the duct detected by the temperature sensor 23 in the duct falls below the second set temperature, it is determined that the use of the heater is stopped, and the electric motor is stopped. The operation of the blower 6 is automatically stopped by stopping the motor 7.

Next, a fourth embodiment will be described. As shown in FIG. 8, a closed space 35 is formed in the duct 1 by mounting a box 34 having a closed lower surface, upper surface, front surface, and both side surfaces in the duct 1. Attach the sensor 23. In this case, the electric motor 7 of the blower 6 energizes the blower 6 when the temperature difference between the indoor temperature detected by the indoor temperature sensor 24 and the duct temperature detected by the duct temperature sensor 23 is equal to or higher than the first set temperature. Start operation. When the indoor temperature detected by the indoor temperature sensor 24 drops by a third set temperature or more from the duct temperature detected by the duct temperature sensor 23, the energization of the electric motor 7 is stopped and the operation of the blower 6 is stopped.

With this configuration, the air flowing through the duct 1 does not flow into the space 35, and the temperature sensor 23 inside the duct does not directly contact the air flowing through the duct 1. 23 is hard even more subjected to temperature effects of the air flowing through the duct, duct temperature T ₃ detected in the duct temperature sensor 23 is as shown in FIG. Indoor temperature T ₄ which is detected by the indoor temperature sensor 24 whereas as shown in FIG.

Therefore, the room temperature T ₄ and the duct temperature T ₃
When the temperature difference is equal to or higher than the _first set temperature X1, it is determined that the heating apparatus is to be used, and the electric motor 7 is energized to start the operation of the blower 6.

After the heater is stopped, the temperature drop in the space 35 is more gradual than the temperature drop of the room temperature, and the temperature difference (T ₃₎ between the duct temperature T ₃ and the room temperature T _{4.
When 3-} T ₄ ) is equal to or higher than the _third set temperature X _3, it is determined that the use of the heating apparatus has been stopped, and the power supply to the electric motor 7 is stopped to stop the operation of the blower 6.

By providing the temperature sensor 23 in the duct in the closed space 35 as described above, since the dirt in the air does not adhere to the temperature sensor 23 in the duct, the temperature inside the duct can be accurately detected for a long time. it can.

[0051]

According to the first aspect of the present invention, the blower 6 is automatically controlled based on a change in the indoor temperature. It is possible to stop the operation of the blower 6 when the operation is started and the use of the heater is stopped and the indoor temperature is lowered.

Accordingly, the blower 6 can be automatically started and stopped by starting and stopping the use of the heating equipment, so that it is not necessary for the user to start and stop the blower 6. It becomes unnecessary and the operation of the blower 6 is not forgotten.

According to the second aspect of the present invention, when the upper air temperature in the room becomes higher than the lower air temperature in the room by the first set temperature or more due to the start of use of the heater, the blower 6 automatically starts operating. When the upper air temperature in the room or the lower air temperature in the room drops below the second set temperature by stopping the use of the heating device after the blower 6 starts operating, the blower 6 automatically stops operating.

Therefore, a troublesome operation by the user is unnecessary, and the operation is not forgotten.

According to the third aspect of the present invention, when the blower 6 is stopped, the damper 20 is in the closed state, and no air flows in the duct 1. When the heater starts to be used, the temperature inside the duct 1 does not rise and the room temperature rises. Therefore, the room temperature becomes higher than the first temperature in the duct in a short time after the heater is started to be used. Then, the operation of the blower 6 is started in a short time after the use of the heater is started.

When the use of the heating device is stopped, the indoor temperature or the temperature in the duct decreases. When the temperature drops below the second set temperature, the operation of the blower 6 is stopped, and at the same time, the damper 20 is closed.

Therefore, troublesome operation of the user is unnecessary, and the operation is not forgotten. In addition, since the blower 6 starts operating in a short time after the use of the heating device and the damper 20 is in communication at the same time, the temperature distribution of the upper and lower layers of the room is uniform in a short time after the use of the heating device is started. Can be

According to the fourth aspect of the present invention, since the temperature sensor 23 in the duct is hardly affected by the temperature of the air flowing through the duct 1, the heater starts to be used and the air flows through the duct 1. Also, the temperature detected by the duct temperature sensor 23 rises slowly. As a result, when the heating device is started to be used, the temperature detected by the temperature sensor 23 in the duct rises slowly, and the temperature detected by the room temperature sensor 24 rises quickly. 24 is the temperature detected in the duct temperature sensor 23
, And becomes higher than the first set temperature, and the operation of the blower 6 is started in a short time after the use of the heater is started.

When the use of the heating equipment is stopped, the indoor temperature and the temperature in the duct fall, and when the temperature drops below the second set temperature, the operation of the blower 6 is stopped.

Therefore, a troublesome operation by the user is unnecessary, and the operation is not forgotten. In addition, since the operation of the blower 6 is started in a short time after the use of the heating device is started, the temperature distribution of the upper and lower layers in the room can be made uniform in a short time after the use of the heating device.

According to the fifth aspect of the present invention, since the temperature sensor 23 in the duct is hardly affected by the temperature of the air flowing through the duct 1, the heater starts to be used and the air flows through the duct 1. Also, the temperature detected by the duct temperature sensor 23 rises slowly. As a result, when the heating device is started to be used, the temperature detected by the temperature sensor 23 in the duct slowly rises, and the temperature detected by the room temperature sensor 24 rises quickly. The temperature detected by the sensor 24 is the temperature sensor 2 in the duct.
The temperature becomes higher than the first set temperature from the detected temperature of No. 3 and the blower 6 starts operating in a short time after the use of the heater is started.

Further, when the use of the heating equipment is stopped, the indoor temperature drops quickly, but the temperature in the closed space 35 drops slowly. Therefore, the indoor temperature is lower than the duct temperature detected by the duct temperature sensor 23. When the temperature becomes lower than the set temperature of 3, the blower 6 stops operating.

Therefore, troublesome operation of the user is unnecessary, and the operation is not forgotten. In addition, since the operation of the blower 6 is started in a short time after the use of the heating device is started, the temperature distribution of the upper and lower layers in the room can be made uniform in a short time after the use of the heating device. Further, since the duct temperature sensor 23 is mounted in the closed space 35, dirt in the air flowing through the duct does not adhere. As a result, the temperature in the duct can be accurately detected over a long period of time.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a control circuit diagram of the blower.

FIG. 3 is a table showing changes in the temperature of lower indoor air and the temperature of upper indoor air.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a control circuit diagram of the blower.

FIG. 6 is a sectional view showing a third embodiment of the present invention.

FIG. 7 is a sectional view showing a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing a fifth embodiment of the present invention.

FIG. 9 is a chart showing changes in the room temperature and the duct internal temperature.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... duct, 2 ... intake port, 3 ... outlet, 6 ... blower, 9
... lower room temperature sensor, 10 ... upper room temperature sensor, 11 ... floor, 12 ... ceiling, 13 ... controller, 20
... Damper, 23. Duct temperature sensor, 24. Indoor temperature sensor, 30. Box, 31. Space, 32. S-shaped tube, 33. Space, 34. Box, 35. Space.

Claims (5)

[Claims] 1. A duct 1 having an intake port 2 at a lower portion and an air outlet 4 at an upper portion, a blower 6 installed in the duct 1, a controller 13 for controlling the operation of the blower 6, and detecting a temperature of a room. A controller for controlling the operation of the blower based on a change in indoor temperature detected by the temperature sensor. 2. A duct 1 having an intake port 2 at a lower portion and an outlet 4 at an upper portion, a blower 6 mounted in the duct 1, a controller 13 for controlling the operation of the blower 6, and a lower air temperature in a room. Lower room temperature sensor 9 for detecting
And an upper room temperature sensor 1 for detecting the upper air temperature in the room
0, the controller 13 starts the operation of the blower 6 when the upper air temperature of the room detected by the upper room temperature sensor 10 is higher than the lower air temperature of the room detected by the lower room temperature sensor 9 by a first set temperature or more. And a second function of stopping the operation of the blower 6 when the temperature drop of the upper air temperature of the room or the lower air temperature of the room is equal to or higher than a second set temperature after the operation of the blower 6 is started. Characteristic indoor air circulation device. 3. A duct 1 having an intake port 2 at a lower portion and an air outlet 4 at an upper portion, a blower 6 mounted in the duct 1, a damper 20 communicating and closing the inside of the duct 1, and a blower 6. , Controller 1 for controlling damper 20
3, a duct temperature sensor 23 for detecting the temperature in the duct 1, and an indoor temperature sensor 24 for detecting the temperature in the room. The controller 13 determines that the indoor temperature detected by the room temperature sensor 24 is the temperature in the duct. When the temperature inside the duct detected by the sensor 23 is higher than the first set temperature by more than
And the first function of bringing the damper 20 into a communicating state, and shutting down the blower 6 and closing the damper 20 when the temperature drop in the room temperature or the duct temperature is equal to or higher than the second set temperature. An indoor air circulation device having a second function of setting a state. 4. A duct 1 having an intake port 2 in a lower part and an outlet 4 in an upper part, a blower 6 mounted in the duct 1, a controller 13 for controlling the blower 6, The controller 13 includes a temperature sensor 23 in the duct mounted so as to be hardly in contact with the flowing air, and an indoor temperature sensor 24 for detecting the temperature in the room. When the temperature inside the duct detected by the sensor 23 is higher than the first set temperature by more than
And a second function of stopping the operation of the blower 6 when the temperature drop of the indoor temperature or the duct internal temperature is equal to or higher than a second set temperature. . 5. A duct 1 having an intake port 2 at a lower portion and an air outlet 4 at an upper portion, a blower 6 mounted in the duct 1, a controller 13 for controlling the blower 6, and a seal in the duct 1. And a room temperature sensor 24 for detecting a room temperature. The controller 13 detects the room temperature detected by the room temperature sensor 24. When the temperature is higher than the duct temperature detected by the duct temperature sensor 23 by a first set temperature or more, the blower 6
And a second function of stopping the operation of the blower 6 when the indoor temperature is lower than the duct internal temperature by a third set temperature or more.