JP3154750U - Kotatsu heater unit - Google Patents

Abstract

The present invention provides a heater unit for a kotatsu that is capable of widening the temperature setting range and the temperature rise rate setting range of the kotatsu and has improved usability. A heater unit for a kotatsu includes heating elements 2 and 3 for heating a kotatsu disposed in a kotatsu inner space surrounded by a kotatsu futon, and the heating elements 2 and 3 disposed in the inner space of the kotatsu. A thermostat 4 connected in series to the thermostat, a temperature control unit 5 connected to the thermostat, and a power control type connected upstream of the power cord from the temperature control unit 5 and outside the inner space of the kotatsu. And a temperature controller 9. [Selection] Figure 1

Description

  The present invention relates to a kotatsu heater unit capable of accurately adjusting temperature.

  Conventionally, in this type of heater unit for a kotatsu, a protective case having a reflector is fixed to the lower surface side of the main body of the rattle kotatsu covered with a kotatsu futon. A heating element such as an infrared heater is disposed in the protective case, and the power plug and the heating element are connected by a power cord. And like patent document 1 and 2, a thermostat is arrange | positioned inside the one side part of a protective case, and the temperature control knob which protrudes on the one side part outer side of a protective case can adjust the temperature of heating element on / off There is a type.

  On the other hand, as in Patent Documents 3 and 4, a temperature control unit is provided in the middle of the power cord connecting the heating element (heater unit) and the power plug, and by operation from a remote controller such as a separate infrared ray, There is also known a type in which a temperature control command signal such as temperature rise / fall or power on / off is issued to the temperature control unit.

Japanese Utility Model Publication No. 7-18110 (see FIG. 1) Japanese Patent Laid-Open No. 10-332157 (see FIG. 1) Japanese Utility Model Publication No. 2-114806 (see FIGS. 1 and 4) Japanese Patent Laid-Open No. 2001-12750 (see FIG. 5 etc.)

  In the former configuration (Patent Documents 1 and 2), since the thermostat is located near the heating element, the thermostat detects the temperature almost the same as the temperature of the inner space of the kotatsu covered with the kotatsu futon, and the power is turned on / off. Can be set easily to the user's temperature preference. On the other hand, in order to adjust the temperature, each time a hand is put in from the kotatsu futon and the temperature adjusting knob is operated, there is a problem in that it is not easy to use.

  Moreover, in the former, as shown by the one-dot chain lines A and B in FIG. 3 showing the temperature change curve, the allowable temperature from the AC commercial power supply of 100V is normally used regardless of the set temperature (T1, T2) in the inner space of the kotatsu. Since the current within the range is supplied to the heating element, the temperature rise in the inner space of the kotatsu proceeds rapidly, and the supply power to the heating element is repeatedly turned on and off according to the on / off operation of the thermostat. However, the temperature controllable range of the thermostat is narrow, and in particular, the problem of being unable to adjust to a low temperature (T3) close to body temperature and the switch sound due to the on / off operation of the thermostat are frequently repeated. There was a problem that became annoying.

  In the latter configuration (Patent Documents 3 and 4), the power supply is adjusted with a circuit of the temperature control unit, and a sensor is attached to the inside of the heating element (heater unit) or in the vicinity thereof. This sensor detects the temperature or supplied current and adjusts the power supplied from the temperature control unit to the heating element (heater unit). Therefore, as shown by a two-dot chain line C in FIG. 3, when the set temperature is increased (T1), the temperature of the heating element rises rapidly, and easily exceeds the set temperature (T1) of the inner space of the kotatsu. There is a problem that the time required to settle (decrease) becomes long.

  Conversely, when the set temperature is set to a low temperature (T3) slightly higher than the body temperature, the power supplied to the heating element (heater unit) becomes extremely low, and the time until the set temperature (T1) in the inner space of the kotatsu is reached. become longer. Therefore, even if a person who came back from the outside enters the kotatsu, it will not warm easily. After setting the set temperature once by operating from a remote controller, etc., the set temperature of the kotatsu internal space will be measured. Therefore, an operation for lowering is required.

  An object of the present invention is to provide a heater unit for a kotatsu that can solve the above-described problems of the prior art.

  In order to achieve the above object, a heater unit for a kotatsu according to claim 1 comprises a heating element for heating a kotatsu disposed in a kotatsu inner space surrounded by a kotatsu futon, and an arrangement in the inner space of the kotatsu. A thermostat connected in series to the heating element, an adjustment temperature value variable setting unit connected to the thermostat, and an upstream side of the power cord from the adjustment temperature value variable setting unit and outside the inner space of the kotatsu And a temperature controller connected to each other.

  According to a second aspect of the invention, in the heater unit for a kotatsu according to the first aspect, the temperature controller executes power control.

  According to the first aspect of the present invention, the thermostat connected in series to the heating element in the heater unit for the kotatsu, the adjustment temperature value variable setting unit connected to the thermostat, and the power cord of the power cord than the adjustment temperature value variable setting unit Since it is equipped with a temperature controller that is connected upstream and outside the inner space of the kotatsu, the temperature control range can be widened compared to the temperature control using only a conventional thermostat, and the thermostat is turned on and off. The operation can be reduced. In addition, compared to conventional temperature control using only a remote controller, the temperature rise rate can be increased even at a low set temperature, and the temperature within the kotatsu can be accurately set and maintained over a wide range, improving user convenience. There is an effect.

  According to the invention of claim 2, since the temperature controller performs power control, there is an effect that power consumption can be reduced.

It is a top view of the state which removed the upper case of the heater unit for kotatsu of this application device. It is a circuit diagram of a heater unit for a kotatsu according to the present invention. It is a figure of the temperature change curve shown with the temperature (vertical axis) and time passage (horizontal axis) of the heater unit for kotatsu of the prior art and the present invention.

  Next, the structure of the heater unit for a kotatsu according to the present invention will be described with reference to FIG.

  The heater unit for a kotatsu of the present invention has two infrared heaters in a rectangular metal protective case (not shown in FIG. 1 from which the upper case is removed) 1 that is fixed to the lower surface of the main body (not shown). The heating elements 2 and 3 such as are fixed in parallel. Each of the heating elements 2 and 3 is 300 W. Therefore, the protective case 1 and thus the heating elements 2 and 3 are disposed in a kotatsu inner space surrounded by a kotatsu futon (not shown).

  A thermostat 4 is disposed inside one side portion of the protective case 1, and a temperature adjusting portion 5 such as a variable resistor and a temperature adjusting knob 6 are adjustable on the vertical wall surface of the one side portion of the protective case 1. It is attached as a setting part. The heating elements 2 and 3 are connected in series, and the thermostat 4 is connected to the heating elements 2 and 3 in series.

  A temperature controller 9 to be positioned outside a kotatsu futon (not shown) is connected between the power plug 10 and an extension of the power cord 8 fixed to the other side of the protective case 1. Therefore, the thermostat 4, the temperature adjustment unit 5 as the adjustment temperature value variable setting unit, and the temperature controller 9 are connected in series. A case 11 of the temperature controller 9 is provided with a dial 12 of a variable resistor 15 for power control and a power switch 13 for power on / off. If the temperature controller 9 and the power cord 8 with the power plug 10 are fixedly connected to the protective case 1, the power cord 8 and the temperature controller 9 can be removed from the heater unit for the kotatsu when not in use in summer or the like. Since it is stored in a location, it is possible to save the trouble of searching for the power cord 8 and the temperature controller 9 when it is used. Since the temperature controller 9 cannot generally be diverted from other specifications, it is possible to eliminate the problem of losing parts during reuse by keeping the temperature controller 9 from being removed from the heater unit for kotatsu as in the present invention. There is.

  FIG. 2 is a circuit diagram of a heater unit for a kotatsu according to the present invention, which is shown as a main body circuit portion 14 having heating elements 2 and 3 and a thermostat 4 (and a temperature adjusting portion 5) and a temperature controller 9 portion.

  The temperature controller 9 is connected to a power switch 13 and a fuse 16 that is turned off due to an overcurrent. A diode 17, a resistor 18, and a light emitting diode 19 are connected in parallel to the downstream side of the temperature controller 9. Further, on the downstream side, a power control unit 23 including a variable resistor 15, a constant voltage diode 21, a triac IC 22, and the like is connected via a coil 20. Reference numerals 24 and 25 are varistors for circuit protection.

  Next, an operation of adjusting the temperature of the kotetsu by the main body circuit unit 14 and the temperature controller 9 unit of the present invention will be described with reference to FIG. 3 showing a temperature change curve.

  For example, when the temperature controller 5 sets a high temperature such as the set temperature T1, and the dial 12 of the temperature controller 9 is set to a medium power or low power location, the supply power is small, so the solid line in FIG. As shown by a temperature change curve indicated by E, the temperature of the heating elements 2 and 3 approaches the set temperature T1 in a state where the temperature rise rate is slow, and thereafter, the thermostat 4 is stabilized at the set temperature T1 by the on / off operation.

  When the temperature adjustment unit 5 is set to a low temperature that is close to the body temperature, such as the set temperature T3, and the dial 12 is set at a high power location, the supply power is increased and the temperature change curve shown by the solid line F in FIG. As described above, the temperature can be approached to the set temperature T1 in a state where the temperature rise rate is high, and thereafter, the thermostat 4 can be stabilized at the set temperature T3 by the on / off operation.

  When the temperature controller 5 sets a high temperature such as the set temperature T1 and the dial 12 of the temperature controller 9 is set at a high power location, as indicated by the alternate long and short dash line A as in the case of the conventional thermostat alone. The temperature can be raised at a high speed, and thereafter the temperature can be stabilized at the set temperature T1 by the on / off operation of the thermostat 4.

  As described above, according to the present invention, the combination of the thermostat 4 with variable temperature control and the temperature controller 9 for power control allows the temperature rise rate to be increased within a wide range under a wide range of set temperatures. It becomes adjustable and the usability is very good for the user.

  The power control that changes the amount of current in the temperature controller 9 unit can reduce the power supplied over time after the set temperature is reached, so the on / off operation frequency of the thermostat 4 can be reduced and the switch sound is bothered. It will not be.

  Even if the temperature controller 9 breaks down for some reason and the AC commercial power (100V) current is continuously supplied directly to the heater unit, abnormally high temperatures and abnormal operations can be prevented as long as the thermostat 4 functions. It is safe.

  In addition, you may make it provide the remote controller which transmits radio signals, such as infrared rays, with respect to the temperature controller 9. FIG.

DESCRIPTION OF SYMBOLS 1 Protective case 2, 3 Heating element 4 Thermostat 5 Temperature control part 6 Knob 8 Power cord 9 Temperature controller 12 Dial 14 Main circuit 15 Variable resistor 23 Power control part

Claims (2)

  A heating element for heating a kotatsu disposed in a kotatsu inner space surrounded by a futon for kotatsu, a thermostat disposed in the inner space of the kotatsu and connected in series to the heating element, and an adjustment connected to the thermostat A heater unit for a kotatsu comprising: a temperature value variable setting unit; and a temperature controller that is connected to the upstream side of the power cord from the control temperature value variable setting unit and outside the inner space of the kotatsu.   The heater unit for a kotatsu according to claim 1, wherein the temperature controller performs power control.

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