JP4448265B2 - Heater energization control device for bathroom air heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device that controls energization of a heater in a bathroom air heater that heats and blows air with an electric heater such as a bathroom ventilation dryer and a bathroom heater.
[0002]
[Prior art]
Conventional general bathroom heaters are installed on the walls or ceilings of bathrooms or dressing rooms, and are used before or during use so that the user does not feel cold when entering the bathroom from the dressing room during winter bathing. It is used to warm the room by driving, and is particularly effective for elderly people to prevent heat shock.
As the above-mentioned bathroom heater, an electric heater for heating air in the main body, a fan for blowing air to the heater to heat the air, and blowing the heated air, and the vicinity of the heater There is known a device provided with a temperature sensor (thermostat) that is provided and detects the temperature of air blown out (heated air temperature) heated by a heater.
[0003]
The aforementioned bathroom heater is operated as follows.
When the operation switch of the bathroom heater is turned on, the operation of the blower is started with energization of the heater, and when the temperature of the blown air during operation reaches the preset upper limit temperature, the temperature sensor detects and the energization of the heater is turned off. If the heater is turned off for a while, the temperature of the blown air decreases, and when the temperature reaches a preset lower limit temperature or lower, the temperature sensor detects again and turns on the heater.
This operation is repeated during operation to keep the bathroom warm.
[0004]
[Problems to be solved by the invention]
In the heater energization control described above, the energization of the heater is turned on and off in a relatively short time, and the temperature in the bathroom repeatedly rises and falls frequently.
For example, as shown by a solid line in FIG. 3, it is assumed that the temperature of the blown air is 58 ° C. and the temperature sensor is turned off for the heater, the temperature of the blown air is 48 ° C. and the temperature sensor is turned on for the heater. That is, 58 ° C. is the upper limit set temperature and 48 ° C. is the lower limit set temperature.
In this case, the time for lowering from the upper limit set temperature to the lower limit set temperature is substantially equal to the time for raising from the lower limit set temperature to the upper limit set temperature, and the fluctuation cycle of the blown air temperature is short.
Therefore, as shown by a solid line in FIG. 4, the temperature in the bathroom repeatedly rises and falls between the upper limit temperature (40 ° C.) and the lower limit temperature (30 ° C.) at short time intervals, and the fluctuation cycle of the bathroom temperature is short. .
[0005]
As a result, the user using the bathroom feels bothersome because he / she feels the temperature change of the blown air and the temperature change in the bathroom.
In the case of a system that uses a lamp or the like for the heater, the lamp that is the heater repeatedly turns on and off in a short time according to the detection of the temperature sensor, and the user using the bathroom feels a change in illuminance. It becomes annoying.
[0006]
In order to minimize the variation in the temperature of the blown air and minimize the variation in the temperature in the bathroom, it is conceivable to control the energization of the heater with an electronic control circuit using a microcomputer or the like.
However, an electronic control circuit using a microcomputer or the like becomes very expensive, leading to an increase in the cost of the bathroom heater.
[0007]
This invention is made | formed in view of the above-mentioned subject, and the objective of this invention is to provide the heater electricity supply control apparatus of the air heater for bathrooms with a long fluctuation cycle of the temperature in a bathroom , and cheap.
[0008]
[Means for Solving the Problems]
The first invention comprises a main body 3 having a suction port 6 and a blowout port 7,
The blower 4 provided in the main body 3, sucks air in the bathroom from the inlet 6 into the main body 3, circulates the air through the main body 3 and blows out the air from the outlet 7 into the bathroom ,
An electric heater 5 that is provided in the main body 3 and generates heat by energization and heats air flowing through the main body 3 ;
A sensor 12 that is switched according to the temperature of the air flowing through the main body 3 ;
The sensor 12 connects the input side to the first output side when the temperature of air flowing through the main body 3 is lower than the lower limit set temperature, and switches the input side to the second output side when the temperature is higher than the upper limit set temperature. In shape,
The input side of the sensor 12 is connected to the power source 10, the first output side is connected to the heater 5, the second output side is connected to the heater 5 via the energization amount regulating member, and the air blown out from the outlet 7 of the main body 3. A heater energization control device for a bathroom air heater, wherein a temperature fluctuation period is increased .
[0009]
2nd invention is the heater electricity supply control apparatus of the air heater for bathrooms whose energization amount regulation member is the diode 13 of half wave rectification in 1st invention.
[0010]
[Action]
According to the first aspect of the invention, when the temperature of the air flowing through the main body 3 is equal to or lower than the lower limit set temperature, the energization amount to the heater 5 is not restricted, and the temperature rises to the upper limit set temperature in a short time.
When the air temperature is equal to or higher than the upper limit set temperature, the energization amount to the heater 5 is restricted, and the time to decrease to the lower limit set temperature is longer than when the energization amount is not restricted.
Therefore, the fluctuation cycle of the temperature of the air blown from the outlet 7 of the main body 3 is long, and the fluctuation cycle of the temperature in the bathroom is also long.
Therefore, the user can use the apparatus with almost no change in the temperature of the air blown from the outlet 7 and the temperature in the bathroom, and does not feel bothered.
When the heater 5 is a lamp, the lamp does not repeat lighting and extinguishing in a short time as in the prior art, but it only takes a relatively long time to repeat a semi-lighting state with slightly less brightness. For the user, it becomes almost unobtrusive and does not feel uncomfortable.
[0011]
In addition, since this control device can be configured by providing only one energization amount regulating member in the conventional control device, it is very inexpensive as compared with the case where an electronic circuit such as a microcomputer is used.
[0012]
According to the second aspect of the present invention, the diode 13 that is an electric component that is already widely used and is inexpensive may be provided, which is very inexpensive as compared with the case where an electronic circuit such as a microcomputer is used.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 is a cross-sectional view of a bathroom heater as an example of a bathroom air heater, to form a body 3 in the case 1 and the panel 2 is provided with a fan 4 and a heater 5 into the main body 3. The heater 5 is an electric heater that generates heat when energized.
By driving the blower 4, air is sucked from the suction port 6 of the panel 2, blown and heated to the heater 5 that is energized to generate heat, and the heated air is blown out from the outlet 7 of the panel 2. is there.
The bathroom heater is attached by inserting the case 1 into the opening 8 a of the ceiling panel 8 of the bathroom, and the panel 2 so as to cover the case 1.
A filter 9 is attached to the back surface of the suction port 6 portion of the panel 2.
[0014]
FIG. 2 is a heater energization control circuit diagram. The power source (AC power source) 10 and the heater 5 are connected via an operation switch 11 and a sensor (thermostat) 12.
As shown in FIG. 1, the sensor 12 is provided in the vicinity of the heater 5. The sensor 12 includes an input terminal (input side) 12a, a first output terminal (first output side) 12b, and a second output terminal ( (Second output side) 12c and a movable contact piece 12d, the input terminal 12a is connected to the power source 10 through the operation switch 11, and the first output terminal 12b is directly connected to the heater 5.
The second output terminal 12c is connected to the heater 5 via an energization amount regulating member, for example, a half-wave rectifier diode 13.
The movable contact piece 12d is switched between a first position where the input terminal 12a is connected to the first output terminal 12b and a second position where the movable contact piece 12d is connected to the second output terminal 12c.
For example, the temperature is switched to the second position when the temperature of the blown air heated by the heater 5 (blown air temperature) is equal to or higher than the upper limit set temperature, and to the first position when the blown air temperature is equal to or lower than the lower limit set temperature.
[0015]
Next, the operation of the bathroom heater will be described.
When the operation switch 11 is turned on, the electric motor 4a of the blower 4 is energized and the fan 4b is rotationally driven.
Since the blown-out air temperature is equal to or lower than the lower limit temperature (for example, 48 ° C.), the movable contact piece 12d of the sensor 12 is in the first position. , AC100V) energized. That is, it becomes a 100% energized state.
Since the heater 5 generates heat and the blown air is heated, the blown air temperature rises.
[0016]
When the blown air temperature becomes equal to or higher than the upper limit set temperature (for example, 58 ° C.), the movable contact piece 12 d of the sensor 12 is switched to the second position, and the heater 5 is energized through the diode 13.
A half-wave rectified wave is generated by the effect of the diode 13, and 50% (for example, DC 50 V) of the current of the power supply 10 is energized to the heater 5. That is, it becomes 50% energized.
[0017]
As a result, the temperature of the blown-out air decreases, but the temperature decrease is as shown by the dotted line in FIG. 3, and becomes slower than the conventional heater indicated by the solid line in FIG. It takes a long time to descend.
Although the above-described fall time varies depending on conditions, it is about 2.5 to 3 longer than that in the non-energized state.
[0018]
When the blown-out air temperature becomes equal to or lower than the lower limit set temperature, the movable contact piece 12d of the sensor 12 is switched to the first position and becomes 100% energized, so that the blown-out air temperature rises to the upper limit set temperature in a short time.
The time for the temperature to rise to the upper limit set temperature is the same as the conventional one as shown by the dotted line in FIG.
[0019]
As described above, the temperature in the bathroom changes as shown by a dotted line in FIG. 4 and the temperature in the bathroom changes from the upper limit temperature (for example, 40 ° C.) to the lower limit temperature (for example, 30 ° C.) as shown in FIG. The time taken for the temperature in the bathroom to rise from the lower limit temperature to the upper limit temperature is the same as in the prior art.
[0020]
From the above, the fluctuation cycle of the blown air temperature is long and the fluctuation cycle of the temperature in the bathroom is long only by using the half-wave rectifying diode 13.
Therefore, the user of the bathroom can use it with almost no change in the blown air temperature and bathroom temperature. In addition, it uses a lamp or the like as a heater, and does not repeatedly turn on and off in a short time as in the past, and it takes a relatively long time to turn on a semi-lighted state with little brightness. Since it only repeats, it will be almost unobtrusive for the user and will not feel uncomfortable.
In addition, this control device can be achieved by simply interposing a single diode in the circuit as compared with a conventional control device, and when a diode is an electronic product that is already widely used, an electronic circuit is used. It is very cheap compared with.
[0021]
Although the above embodiment described the bathroom heater, it is needless to say that the present invention can be applied to a bathroom air heater such as a bathroom ventilation dryer having a ventilation function.
The energization amount regulating member is not limited to a half-wave rectifying diode, and may be an electrical resistor or a combination of an electrical resistor and ground.
[0022]
【The invention's effect】
According to the first aspect of the present invention, when the temperature of the air flowing through the main body 3 is equal to or lower than the lower limit set temperature, the energization amount to the heater 5 is not restricted, and the temperature rises to the upper limit set temperature in a short time.
When the air temperature is equal to or higher than the upper limit set temperature, the energization amount to the heater 5 is restricted, and the time to decrease to the lower limit set temperature is longer than when the energization amount is not restricted.
Therefore, the fluctuation cycle of the temperature of the air blown from the outlet 7 of the main body 3 is long, and the fluctuation cycle of the temperature in the bathroom is also long.
Therefore, the user can use the apparatus with almost no change in the temperature of the air blown from the outlet 7 and the temperature in the bathroom, and does not feel bothered.
When the heater 5 is a lamp, the lamp does not repeat lighting and extinguishing in a short time as in the prior art, but it only takes a relatively long time to repeat a semi-lighting state with slightly less brightness. For the user, it becomes almost unobtrusive and does not feel uncomfortable.
[0023]
In addition, since this control device can be configured by providing only one energization amount regulating member in the conventional control device, it is very inexpensive as compared with the case where an electronic circuit such as a microcomputer is used.
[0024]
According to the second aspect of the present invention, it is only necessary to provide the diode 13 which is already widely used and is an inexpensive electric component, which is very inexpensive as compared with the case where an electronic circuit such as a microcomputer is used.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a bathroom heater.
FIG. 2 is a heater energization control circuit diagram.
FIG. 3 is a chart showing changes in blown air temperature.
FIG. 4 is a chart showing changes in bathroom temperature.
[Explanation of symbols]
4 ... Blower, 5 ... Heater, 10 ... Power supply, 11 ... Operation switch, 12 ... Sensor, 13 ... Diode.

Claims (2)

A main body 3 having an inlet 6 and an outlet 7;
The blower 4 provided in the main body 3, sucks air in the bathroom from the inlet 6 into the main body 3, circulates the air through the main body 3 and blows out the air from the outlet 7 into the bathroom ,
An electric heater 5 that is provided in the main body 3 and generates heat by energization and heats air flowing through the main body 3 ;
A sensor 12 that is switched according to the temperature of the air flowing through the main body 3 ;
The sensor 12 connects the input side to the first output side when the temperature of air flowing through the main body 3 is lower than the lower limit set temperature, and switches the input side to the second output side when the temperature is higher than the upper limit set temperature. In shape,
The input side of the sensor 12 is connected to the power source 10, the first output side is connected to the heater 5, the second output side is connected to the heater 5 via the energization amount regulating member, and the air blown out from the outlet 7 of the main body 3. A heater energization control device for an air heater for a bathroom , characterized in that the temperature fluctuation cycle is lengthened . The heater energization control device for a bathroom air heater according to claim 1, wherein the energization amount regulating member is a half-wave rectifier diode 13.

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