JPH0618851U - Electric kotatsu with fan function - Google Patents

Abstract

(57) [Summary] [Purpose] In addition to the original function of the kotatsu, which is heating in winter, the fan inside the kotatsu is effectively used in summer. [Structure] A motor 5 for a blower fan 4 arranged in the center of the lower surface of a top plate 1 of a yagura, an annular heating element 2 arranged outside the blower fan, and air blown by the blower fan. It has a louver 13 arranged below the blower fan that spreads the flow inside the yagura, and a switch for selecting the rotation speed and rotation direction of the motor between low speed reverse rotation and high speed forward rotation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a yagura electric kotatsu that uses a heating element and a fan for blowing, and in addition to the conventional heating in the winter, which is the original function of the kotatsu, a fan that effectively uses the fan function provided inside the kotatsu also in the summer. Regarding electric kotatsu with function.

[0002]

[Prior art]

 In recent years, the Yagura electric kotatsu is used as a furniture-style kotatsu as a household table outside the winter season, but its function is only for heating during the winter season.

A conventional Yagura electric kotatsu will be described below.

4, FIG. 5 and FIG. 6 show a conventional Yagura electric kotatsu, FIG. 4 is a side sectional view of the yagura electric kotatsu, FIG. 5 is a side view of a state of use, and FIG. 6 is an electric circuit diagram. Show. As shown in FIG. 5, a heating unit 9 is provided on the lower surface of the top plate 1 of the yagura, and the heating unit 9 has an annular heating element 2 on the lower surface of the reflection plate 3 and a lower surface of the reflection plate 3 as shown in FIG. A fan 4 and a motor 5 are arranged in the center of the surface, a heat diffusion plate 6 is attached to the lower surface of the reflection plate 3, and the lower surface of the heat diffusion plate 6 is covered with a protective net 7. As shown in FIG. 6, the controller 8 is provided with a power control circuit 10 for controlling the amount of heat generated by the annular heating element 2, and is provided with a positive temperature coefficient thermistor 11 for detecting the temperature inside the kotatsu.

The operation of the yagura electric kotatsu configured as described above will be described below. First, when the annular heating element 2 is energized, the internal temperature of the kotatsu is low at the beginning of energization, and the resistance value of the positive temperature coefficient thermistor 11 is low. Therefore, the annular heating element 2 is supplied with 100% power from the power control circuit 10 and 100%. Radiates the heat of. The temperature in the kotatsu rises as the energization time elapses, the temperature of the positive temperature coefficient thermistor 11 also rises, and the resistance value also increases. Therefore, the electric power supplied to the annular heating element is limited by the power control circuit 10, and the annular heating element 2 Radiant heat is also limited, and the temperature inside the kotatsu is controlled to be constant. The fan 4 is driven by a motor 5 and has an effect of making the temperature inside the kotatsu uniform and at the same time preventing heat from being accumulated in the heat generating unit and preventing the temperature of the top plate 1 from rising excessively.

[0006]

[Problems to be solved by the device]

 However, the above-mentioned configuration has only a heating function, and as described above, when used as a furniture kotatsu all year round, it is currently used only as a table function, especially in the summer season. .

[0007] Furthermore, in order to add a fan function that can be effectively used in summer as well as a heating function in winter by using a fan installed in an electric kotatsu of warm air, it is aimed at heating in winter. It is necessary to change the blast volume and blast direction depending on the time of day and the time of summer blast.

In view of the above, in the present invention, by adding a simple function, the fan of the heating element section is made to have a fan function so as to have a function that can be effectively utilized in the summer season. The purpose is to provide an electric kotatsu.

[0009]

[Means for Solving the Problems]

 The electric kotatsu with fan function of the present invention comprises a fan motor arranged in the center of the lower surface of the top plate of the yagura, an annular heating element arranged outside the fan, and the fan for fan. A louver disposed below the blower fan for spreading the air flow sent out by the inside of the yagura, and a switch for selecting the rotation speed and rotation direction of the motor between low speed reverse rotation and high speed forward rotation. It is characterized by

[0010]

[Action]

 According to the present invention, the motor for driving the blower fan can be switched between low-speed reverse rotation and high-speed forward rotation, and in order to make the fan effect more effective in the summer, the air is passed through the louver from the center of the yagura. It is configured so that the air flow is discharged so that the air flow is effectively applied to the legs of the user.

[0011]

【Example】

 1, 2, and 3 show an electric kotatsu with a fan function according to an embodiment of the present invention. FIG. 1 is a side sectional view, FIG. 2 is a partially cutaway plan view of FIG. 1, and FIG. 3 is an electric circuit diagram. Is.

A heating unit 9 is arranged on the lower surface of the top plate 1 of the yagura shown in FIGS. 1 and 2. In this heat generating unit 9, an annular heating element 2 is arranged on the lower surface of a reflecting plate 3, a motor 5 having a fan 4 attached to the center of the annular heating element 2 is provided, and the lower surface of the annular heating element 2 is covered by a heat diffusion plate 6 The louver 13 is provided on the lower surface of the motor 5 for driving the fan 4, and the lower surface is covered with the protective net 7. As shown in the electric circuit diagram of FIG. 3, the controller 8 has a changeover switch 12 for changing the rotation direction and the number of rotations of the motor 5, and the other same elements as those shown in FIG. The description is omitted.

The operation of the electric kotatsu configured as described above will be described. First, in the winter, when the switch 12 is tilted to the terminal a side and power is supplied to the power supply terminals c and d, the rotation speed of the motor 5 becomes a low speed reverse rotation of, for example, 800 rotations per minute, and the air flow by the fan 4 is shown in FIG. Air is drawn from below the central portion of the protective net 7 as indicated by an arrow g, and is discharged while cooling the motor 5, the annular heating element 2, and the reflector 3 in the oblique peripheral direction of the heating unit 9. At the initial stage of energization, the temperature inside the kotatsu is low, the temperature of the positive temperature coefficient thermistor 11 is low, and the resistance value is low. Therefore, the voltage between ef in FIG. 3 is high, and the power supplied from the power control circuit 10 to the annular heating element 2 is 100 parts. Cents are supplied. As the temperature inside the kotatsu increases with the passage of time, the resistance of the thermistor 11 increases and the voltage between ef decreases, so the power supplied from the power control circuit 10 to the annular heating element 2 is limited. It is controlled to be constant.

Next, when the switch 12 is switched to the terminal b side when it is used as a fan in the summer, the power control circuit 10 cuts off the power supply circuit to the annular heating element 2 and the power is cut off so that the rotation speed of the motor 5 is, for example. The high-speed forward rotation of 2000 rpm is performed, and the air flow from the fan 4 is rectified and delivered in the direction of arrow h by the louver 13 below the heat generating unit 9 to uniformly blow the inside of the kotatsu. Further, the fan 4 is best an axial flow fan that can efficiently obtain the air volume in both the high speed forward rotation and the low speed reverse rotation.

[0015]

[Effect of device]

 As described above, the electric kotatsu with fan function of the present invention has a simple structure and can be operated by a simple switching operation of the rotation speed and the rotation direction of the motor which has been conventionally utilized as a part of the heating element forming part. In addition to the heating function only in winter, it can also be used as a fan in summer.

[Brief description of drawings]

FIG. 1 is a side sectional view of an electric kotatsu having a fan function according to an embodiment of the present invention.

2 is a partially cutaway plan view of FIG. 1. FIG.

FIG. 3 is an electric circuit diagram of the electric kotatsu of FIG.

FIG. 4 is a side sectional view of a conventional electric kotatsu.

5 is a side view of the use state of FIG. 4. FIG.

6 is an electric circuit diagram of FIG. 4. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Top plate, 2 ... Annular heating element, 3 ... Reflector, 4 ... Fan, 5 ... Motor, 6 ... Heat diffusion plate, 7 ... Protective mesh,
8 ... Controller, 9 ... Heating unit, 10 ... Power control circuit, 11 ... Positive characteristic thermistor, 12 ... Switch,
13 ... louvers.

Claims (1)

[Scope of utility model registration request] 1. A motor for a blower fan arranged in the center of the lower surface of a top plate of a yagura, an annular heating element arranged outside the blower fan, and an air flow sent by the blower fan. With a fan function, characterized in that it has a louver that is arranged below the blower fan that spreads inside the tower, and a switch that selects and switches the rotation speed and rotation direction of the motor between low speed reverse rotation and high speed forward rotation. Electric kotatsu.