JPH0449022B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a forced convection type heater in which the amount of convection air is controlled so that the temperature difference between the upper and lower parts of a room is constant. It is about improvement.

[Conventional technology]

FIG. 5 is a sectional view showing a schematic configuration diagram of a conventional forced convection type heater, and FIG. 6 is a configuration diagram showing an operating section. First, in FIG. 5, 1 is a forced convection type heater, and 2 is an air supply/exhaust tube attached to a wall for supplying and exhausting air.

Air sucked in by a blower (not shown) from this supply/exhaust pipe 2 and oil, gas, etc. are mixed in a combustion pipe 3 and combusted. This combustion tube 3
The combustion heat generated in the combustion chamber is taken out into the room by a heat exchanger 4.

Further, 5 is a blower that cools the heat exchanger 4 and the combustion tube 3 and sends heat into the room, and 6 is a temperature sensor consisting of a thermistor and the like for controlling the room temperature.

On the other hand, in FIG. 6, 7 is an ignition switch which is a main switch, 8 is a room temperature control switch, and 9 is an air volume adjustment switch that adjusts the air flow rate by changing the number of revolutions of the blower 5, etc.

The conventional forced convection heater is constructed as described above, and when the user feels cold, he operates the ignition switch 7 to start combustion and at the same time adjusts the room temperature control switch 8 to the desired room temperature. Eventually, when the room temperature rises and the temperature of the temperature sensor 6 exceeds the set temperature, combustion is stopped, and when the temperature of the temperature sensor 7 falls below the set temperature, combustion is restarted and the room temperature is controlled to the user's desired temperature. There is.

Further, the air volume is adjusted by selecting strong wind or weak wind with an air volume adjustment switch 9 according to the user's preference.
The air volume control switch 9 controls the rotation speed of the blower 5, and the noise value is large when the wind is weak and becomes small when the wind is weak. In many cases, this is selected.

By the way, as we know that hot air is light and cold air is heavy, in the case of forced convection heaters,
The high-temperature air that is blown out eventually rises and is often separated into a high-temperature area at the top of the room, near the ceiling, and a low-temperature area at the bottom, near the floor.

As a result, there is a temperature difference between the top and bottom where the head and face area are hot and the feet are cold, making the user uncomfortable. The difference in temperature between the top and bottom is greatly influenced by the insulation of the house and the outside temperature; the worse the insulation of the house and the lower the outside temperature, the larger the difference in temperature between the top and bottom becomes.

The difference in temperature between the upper and lower sides is also affected by factors on the equipment side, and has a particularly strong relationship with the blowout air volume and blowout angle. The larger the blowout air volume and the larger the downward blowing angle from the horizontal, the smaller the vertical temperature difference becomes.

[Problem that the invention seeks to solve]

However, as mentioned above, in conventional forced convection heaters, the air volume adjustment, which has a large impact on indoor comfort as a component on the equipment side, is left to the user's choice. Even if you select , it may become uncomfortable depending on the structure of the house and the outside temperature, and the user may feel uncomfortable due to the influence of the airflow that is higher than necessary.

The indoor environment during heating is constantly changing due to the influence of the outside temperature, etc., and people living indoors may become uncomfortable, or they may have to adjust the room temperature control switch 8 and air volume control switch 9 to avoid discomfort. I had to adjust.

This invention was made to solve this problem, and the temperature difference between the temperature in the lower part of the room and the temperature in the upper part of the room can be made equal to the temperature difference set by the user.
To provide a heater that provides a comfortable indoor environment unaffected by outside air temperature or the structure of a house, and provides an environment with low noise.

[Means for solving problems]

A heater according to the present invention includes a temperature difference detection circuit that detects a detected temperature difference between a first temperature detection element attached to a lower part of the room and a second temperature detection element attached to an upper part of the room; a temperature difference comparison circuit that compares the detection value of the detection circuit and a set temperature difference; a temperature comparison circuit that compares the detection temperature of the first temperature detection element with a predetermined temperature; and the output of this temperature comparison circuit and the temperature. By the output of the difference comparison circuit,
When the detected temperature of the first temperature detection element is below a predetermined temperature, and when this detected temperature is above the predetermined temperature and the detected temperature difference is near the set temperature difference, the indoor convection blower is set to a predetermined rotation speed, and the When the temperature detected by the first temperature detection element is equal to or higher than a predetermined temperature and the detected temperature difference is larger than the set temperature difference, the rotation speed of the indoor convection blower is increased, and the temperature detected by the first temperature detection element is increased. A blower control circuit is provided that reduces the rotational speed of the blower when the detected temperature difference is smaller than the set temperature difference at a predetermined temperature or higher.

[Effect]

In this invention, the temperatures at the lower and upper parts of the room, which vary depending on the outside air temperature and the structure of the house, are detected by two temperature detection elements, the first and second, respectively, and the temperature is determined from the detection outputs of these two temperature detection elements. A difference detection circuit detects a temperature difference, and a temperature difference comparison circuit compares this temperature difference with a temperature difference set by the user, and determines whether the comparison result and the temperature detected by the first temperature detection element are above or below a predetermined temperature. By controlling the rotational speed of an indoor convection blower using a blower control circuit, the amount of air blown out that affects the indoor environment is changed on the equipment side, creating a comfortable and unchanging environment that matches the user's preferences.

〔Example〕

Embodiments of the heater of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment. In FIG. 1, the same parts as in FIG. 5 will be described with the same reference numerals. In Figure 1, 1 is a heater installed indoors, 5
is a blower for indoor convection, and the above is the same as in Fig. 5, but differs from Fig. 5 in the following points.
This is a characteristic feature of this invention.

That is, the first temperature detection element 10 is constituted by a thermistor or the like, is installed near the floor in the room, and is designed to detect the temperature corresponding to a human footstep. The detection output of the first temperature detection element 10 is sent to a temperature difference detection circuit 12 and a temperature comparison circuit 14.

Further, a second temperature detection element 11 made of a thermistor or the like is arranged near the ceiling of the room. This second temperature detection element 11 detects a temperature corresponding to the human head, and its detection output is sent to a temperature difference detection circuit 12.

The temperature difference detection circuit 12 includes a first temperature detection element 1
0 and the detection output of the second temperature detection element 11 is detected, and the detected temperature difference is sent to the temperature difference comparison circuit 13.

The temperature difference comparison circuit 13 also receives a set temperature difference freely set by the user.
This set temperature difference is compared with the detected temperature difference from the temperature difference detection circuit 12, and as shown in Fig. 2, "1" is output when the detected temperature difference is low, and "0" is output when the detected temperature difference is high. The signal is output from terminal a and sent to the first input terminal of ungate 15.

Further, when the detected temperature difference is low, "0" is output from the output terminal b of the temperature difference comparison circuit 13, and
When the detected temperature difference is high, "1" is output and sent to the first input terminal of the AND gate 16.

On the other hand, the detection output of the first temperature detection element 10 is output to a temperature comparison circuit 14. This temperature comparison circuit 14 compares the temperature detected by the first temperature detection element with a certain reference temperature (approximately 15 degrees Celsius), and
As shown in the figure, when the detected temperature is lower than the reference temperature, "0" is output, and when the detected temperature is higher than the reference temperature, "1" is output, and the input terminals of the AND gates 15 and 16 and the blower control circuit 20 are output. It is designed to be sent to end Z.

Each output terminal of AND gates 15 and 16 is connected to a second input terminal of AND gates 17 and 18.
The first input terminals of the AND gates 17 and 18 are connected to the output terminal of the timer circuit 19. As shown in FIG. 4, this timer circuit 19 outputs pulses at regular intervals of about 1 minute to 10 minutes.

The output terminals of the AND gates 17 and 18 are connected to the input terminals y and x of the blower control circuit 20, respectively. This blower control circuit 20 increases the rotation speed of the blower 5 when "1" is input to the input terminal x, lowers the rotation speed of the blower 5 when "1" is input to the input terminal y, and outputs the rotation speed to the input terminal Z. When "0" is input, the blower 5 is controlled to reach a predetermined rotation speed.

In the heater of the present invention configured as described above, when the indoor temperature is low and the user turns on the heater 1, the temperature detected by the first temperature detection element 10 is lower than the reference, so the temperature comparison circuit 14 becomes "0", and this is the blower control circuit 20.
, the blower 5 is operated at a certain rotation speed.

At this time, no matter what temperature the second temperature detection element 11 detects, the temperature difference detection circuit 12
No matter what output the temperature difference comparison circuit 13 outputs, the input terminal x of the blower control circuit 20 and its input become "0" by the AND gates 15 to 18, and the rotation speed of the blower 5 is determined by the input terminal Z.

Eventually, as the indoor temperature rises, the detected temperature of the first temperature detection element 10 attached to the lower part of the room becomes higher than the reference temperature of the temperature comparison circuit 14.
The output of the temperature comparison circuit 14 becomes "1".

At this time, the temperature difference detection circuit 12 detects the difference between the temperature detected by the second temperature detection element 11 installed near the ceiling and the temperature detected by the first temperature detection element 10, and the difference between this detected temperature difference and the temperature detected by the user A temperature difference comparison circuit 13 compares the set temperature differences.

Now, if the detected temperature difference is large, the output terminal a of the temperature difference comparison circuit 13 becomes "0", and the output terminal b
becomes "1". Also, since the output of the temperature comparison circuit 14 is "1", the output of the AND gate 16 becomes "1", and when the pulse of the timer circuit 19 is input, the output of the AND gate 18 becomes "1", and the blower Since the input terminal x of the control circuit 20 becomes "1", the rotation speed of the blower 5 increases by a certain determined rotation speed.

When the rotational speed of the blower 5 increases, the indoor circulating air volume increases, so the first temperature difference detection circuit 12 detects the
The detected temperature difference between the temperature detection element 10 and the second temperature detection element 11 becomes smaller. When the detected temperature difference becomes smaller and becomes equal to the set temperature difference set by the user,
Both the output terminal a and the output terminal b of the temperature difference comparison circuit 13 become "0", and the input terminal x of the blower control circuit 20,
The input terminal y becomes "0" and the rotation speed of the blower 5 remains unchanged. Therefore, there is no change in the indoor environment.

If the detected temperature difference is smaller but still larger than the temperature difference set by the user, the temperature difference comparison circuit 13
Output terminal a becomes "0", output terminal b becomes "1",
The output of the AND gate 15 becomes "0", the output of the AND gate 16 becomes "1", the input terminal x of the blower control circuit 20 becomes "1" due to the pulse of the timer circuit 19, and the rotation speed of the blower 5 increases. . This reduces the difference in temperature between the top and bottom of the room.

Further, when the outside air temperature rises and the detected temperature difference becomes smaller than the set temperature difference, the output terminal a of the temperature difference comparison circuit 13 becomes "1", the output terminal b becomes "0", and the AND gate 15 becomes "1". , AND gate 16 is “0”
Since the output of the AND gate 17 becomes "1" due to the pulse of the timer circuit 19, the input terminal y of the blower control circuit 20 becomes "1", and the rotation speed of the blower 5 decreases. This increases the temperature difference between the top and bottom of the room, but reduces noise.

In this way, since the rotation speed of the blower 5 is changed so that the temperature set by the user and the difference in temperature detected by the first temperature detection element 10 and the second temperature detection element 11 are equal, the setting of the heater location, outside temperature,
Users can always create the environment they want, regardless of the airtightness or insulation of the house.

Moreover, since the blower 5 is not rotated at a higher speed than necessary when the difference in temperature between the upper and lower parts of the room is small, such as when the outside air temperature is high, noise is reduced.

Note that in the above embodiment, the second temperature detection element 1
1 was placed in the upper part of the room, but there is a correlation with the temperature of the upper part of the room even when the temperature is 40 cm to 60 cm above the floor, and the same effect as in the above embodiment can be expected even when the temperature is 40 cm to 60 cm above the floor.

In addition, in the above embodiment, the case of a floor-standing forced convection type heater was explained, but a wall-mounted type, a radiant type,
Even if other heating devices such as a heat pump type heating device are used, the same effects as in the above embodiment can be achieved.

[Effects of the Invention] As explained above, the present invention includes a first temperature detection element that is attached to the lower part of the room and detects the temperature near the floor surface, and a second temperature detection element that is attached to the upper part of the room that detects the temperature of the upper part of the room. a detection element, and the first
a temperature difference detection circuit that detects the temperature difference between the temperature detection element and the second temperature detection element; and a temperature difference comparison circuit that compares the temperature difference freely set by the user with the temperature difference detected by the temperature difference detection circuit. and a temperature comparison circuit that compares the detected temperature of the first temperature detection element with a predetermined temperature, and the detected temperature of the first temperature detection element is determined by the output of this temperature comparison circuit and the output of the temperature difference comparison circuit. is below a predetermined temperature, and when this detected temperature is above a predetermined temperature and the detected temperature difference is near the set temperature difference, the indoor convection fan is set at a predetermined rotation speed, and the temperature detected by the first temperature detection element is When the detected temperature difference is higher than a predetermined temperature and the detected temperature difference is larger than a set temperature difference, the rotation speed of an indoor convection blower is increased, and when the detected temperature of the first temperature detection element is higher than a predetermined temperature, the detected temperature difference is set. Since the air blower control circuit reduces the rotation speed of the blower when the temperature difference is smaller than the temperature difference, a comfortable indoor environment that is not affected by the outside temperature or the structure of the house can be obtained, and at the same time, an environment with low noise can be obtained. It has the effect of

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of an embodiment of the heating machine of the present invention, Fig. 2 is a diagram showing the output of the temperature difference comparison circuit in the above heating machine, and Fig. 3 is a diagram showing the output of the temperature difference comparison circuit in the above heating machine. A diagram showing the output, FIG. 4 is a diagram showing the output of the timer circuit in the same heating machine, and FIG. 5 is a sectional view showing the configuration of the conventional heating machine.
FIG. 6 is a configuration diagram showing the operating section of a conventional heater. 1... Heater, 5... Indoor convection blower, 1
0...First temperature detection element, 11...Second temperature detection element, 12...Temperature difference detection circuit, 13...Temperature difference comparison circuit, 14...Temperature comparison circuit, 15-1
8...And gate, 19...Timer circuit, 20
...Blower control circuit. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A first temperature detection element that is attached to the lower part of the room and detects the temperature near the floor surface, a second temperature detection element that is attached to the upper part of the room and detects the temperature of the upper part of the room, and the first temperature detection element. a temperature difference detection circuit that detects a temperature difference between a second temperature detection element; a temperature difference comparison circuit that compares a temperature difference freely set by a user with a temperature difference detected by the temperature difference detection circuit;
A temperature comparison circuit that compares the temperature detected by the first temperature detection element with a predetermined temperature, and an output of this temperature comparison circuit and an output of the temperature difference comparison circuit, the detection temperature of the first temperature detection element is determined to be a predetermined temperature. When the detected temperature is equal to or lower than a predetermined temperature, and when the detected temperature difference is near the set temperature difference, the indoor convection blower is set to a predetermined rotation speed, and the detected temperature of the first temperature detection element is set to the predetermined temperature. In the above, when the detected temperature difference is larger than the set temperature difference, the rotation speed of the indoor convection blower is increased, and when the detected temperature of the first temperature detection element is equal to or higher than the predetermined temperature, the detected temperature difference becomes the set temperature difference. and a blower control circuit that reduces the rotational speed of the blower when the blower is smaller.