JPH0544929A - Hot wind heater - Google Patents

Abstract

PURPOSE:To obtain a hot wind heater which can do such operations with a simple handling as raising temperature a little higher when heating has just started or one feels chilly and lowering the temperature to a normal one after heating. CONSTITUTION:An operating means 3 is provided in an operation part independent from a temperature setting means 2, which selects a temporary temperature raising mode. When the temporary temperature raising mode is selected, an automatic temperature control is made to raise temperature up to a target value which is higher by a prescribed value from a set one and to lower the temperature down to the set value after a prescribed time period. By this, room temperature changing operation, which conventionally needed temperature setting twice, can be done by a single one-touch operation. Thus the conventional temperature setting operations become unnecessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air heater for home use.

[0002]

2. Description of the Related Art When a room is completely cold, it may sometimes feel chilly even after the room temperature rises to the temperature during steady heating. This is because the warm air heater warms the room only by convection, so even if the temperature of the indoor air reaches the set temperature, the temperature of walls, floors, etc. has not yet risen sufficiently, This is because it takes away radiant heat. In such a case, the user once sets the temperature higher than the usual set temperature, and after the body is sufficiently warmed, lowers the set temperature to the normal steady temperature by performing two temperature setting operations. I had to do it each time.

[0003]

However, in the normal case,
Once the user decides on an appropriate room temperature, he / she routinely does not operate the temperature setting part of the heater but simply turns on the start switch when starting the heater. If you try to set to, it is bothersome to remember the usual set temperature for each setting operation, and it is easy to forget because this second operation is done after your body warms, so the room temperature is high. However, there is a drawback in that the above condition lasts for too long and causes the user to feel uncomfortable and wastes energy.

In order to eliminate the need for such troublesome operation, a method may be considered in which the preset temperature is once increased at the start of operation and preliminarily programmed so that the preset temperature is automatically lowered after a predetermined time. In that case, even when the user does not want to raise the room temperature, such as when the difference between the set temperature and the outside air temperature is not so large, or when the remaining time has not elapsed after the previous heating, This is inconvenient because the temperature is constantly raised.

[0005]

In view of the above points, the present invention provides an operating section of a hot air heater having automatic temperature control means,
Temperature setting means 2 for setting the target temperature of the automatic temperature control means
In addition to the above, a temporary temperature increase mode start operation unit 3 for temporarily increasing the target temperature is provided, and when the temporary temperature increase mode start operation unit 3 is operated, the temperature setting means 2 inputs the temperature. While the set value is stored, temperature control is performed with a temperature higher than the set value by a fixed value as a target, and the target temperature is automatically returned to the set value after a lapse of a fixed time.

[0006]

Operation: Temporary temperature increase mode When the temporary temperature increase mode is selected by the operation section, the temperature of the room temperature is controlled for a certain time (for example, 30 minutes) with a target value higher than the set temperature by a constant value (for example, 2 ° C) Since the temperature is automatically returned to the set temperature after the operation, the user can change the temperature twice by one-touch operation, and the set temperature does not need to be changed.

[0007]

FIG. 1 shows an example of a control circuit as a control means of a warm air heater according to the present invention. In the figure, reference numeral 1 is a power switch of the control circuit, which is turned on in synchronization with the activation of the heater. Reference numeral 2 is a temperature setting means, and in this embodiment, it is constituted by a changeover switch 2 for selecting a reference voltage to be compared with the output voltage of the thermistor Th by switching a plurality of taps of the voltage dividing resistor Rv. Reference numeral 3 denotes a temporary temperature increase switch as a temporary temperature increase mode start operation unit, which is not pressed when the normal mode is selected. When the power switch 1 is turned on in selecting the normal mode, the resistor R
_The thermistor Th that appears at the connection point between ₁ and the thermistor Th
Output voltage Vt and the reference voltage Vr divided by the voltage dividing resistor Rv and selected by the temperature setting means 2 are compared by the voltage comparison circuit 4, and a signal corresponding to the voltage difference (Vr-Vt) is gas burner control. It is sent to the circuit 5 to control the fuel supply solenoid valve of the gas burner. That is, the reference voltage Vr corresponds to the set temperature, and the temperature is controlled with this as a target value.

When it is desired to temporarily raise the room temperature to a high temperature, that is, when the temporary temperature increase mode is selected, the temporary temperature increase switch 3 is pressed after the power switch 1 is turned on. When this switch 3 is pressed, the timer T is activated and its normally closed immediate contact x
_{Since 1} is opened and the voltage across the resistor R ₂ is added to the reference voltage Vr selected by the switch 2, the control target temperature is shifted to the high temperature side by a constant value (2 ° C.). In this embodiment, since an instantaneous contact is used as the temporary temperature increase switch 3, the timer T holds itself by its normally closed immediate contact x ₂ upon activation. When the set time (30 minutes) has elapsed, the current of the timer T is cut off by the time-delayed normally closed contact x ₃ , so that the normally closed immediate contact x ₁ is restored to short-circuit the resistor R ₂ and thereby the reference voltage Vr. Lower the target temperature to 2
The temperature is lowered by ℃ and returned to the set temperature.

FIG. 2 shows an example of the operation section, and the temporary temperature increase mode start operation section 3 is displayed as a "was there" switch.

FIG. 3 shows the operating state of the present invention.
Immediately after the power switch ₁ is turned on at t ₁ , the temporary temperature increase switch 3
A case of pressing, the room temperature is a constant temperature controlled at that temperature then stood up to a set temperature plus 2 ° C., automatically returns to the set temperature t ₂ After 30 minutes. When the switch 3 is pressed at t _{3 when the} room temperature is stable at the set temperature, the temperature rises by 2 ° C. from the set temperature as shown in the figure,
After 30 minutes, the temperature returns to the set temperature again at t ₄ .

In the present embodiment, the control means for the temporary temperature rise mode is constructed as a control circuit (FIG. 1) separate from the automatic temperature control means, but of course, these are controlled by a microprocessor. It can also be configured as a circuit.

[0012]

According to the present invention, when the room is completely cold or the body is frozen, the user can select a heating temperature higher than usual with one touch,
After the room is warm enough, it automatically returns the room temperature to the usual steady temperature. Further, since such a temporary temperature increase mode can be selected by a temporary temperature increase switch provided separately from the temperature setting means, the normal mode can be freely selected on a relatively warm day. Further, even if the room temperature is changed in this way, since the set temperature itself is stored by the temperature setting means, a troublesome temperature setting operation is unnecessary.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of a warm air heater showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing an example of an operation unit according to the present invention.

FIG. 3 is an operation explanatory diagram of the present invention.

[Explanation of symbols]

 1 Power Switch 2 Temperature Setting Means (Changeover Switch) 3 Temporary Temperature Increase Mode Start Operation Section (Temporary Temperature Increase Switch) T Timer Th Thermistor

Claims (1)

[Claims] 1. An automatic temperature control means, a means for setting a target temperature of the automatic temperature control means, a temporary temperature raising mode start operation part, and the temperature setting means set by the operation of the operation part. A hot air heater comprising: a control unit that shifts the target temperature to a high temperature side by a constant temperature, and automatically returns the target temperature to the set temperature after a lapse of a predetermined time.