JPH01131662A - Sauna - Google Patents

Abstract

PURPOSE:To prevent fire from starting due to malfunction of a system, by providing a first breaking means for cutting off the supply of electric power when the temperature in a sauna room exceeds a preset value, an alarm means for giving an alarm when the first breaking means is activated and a second breaking means which is activated at a temperature different from the preset value. CONSTITUTION:An electric stove for a sauna has two electric heaters H1 and H2 with which the temperature in a sauna room 6 is rapidly raised. A thermostat THM and a thermal fuse TF are provided in the room 6. The thermostat THM works, when the temperature in the room 6 exceeds a preset value, e.g., 150 deg.C, to cut off the supply of electric power to the electric heaters H1 and H2 and to activate an alarm buzzer BZ. The thermal fuse TF blows, when the temperature in the room 6 rises over another preset value which is higher than the preset value for the thermostat THM, e.g., 170 deg.C, to cut off the supply of electric power to the electric heaters H1 and H2. The electric system for a sauna constructed as above has double safety devices which work at two different temperatures, thus keeping fire from starting.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a sauna.

[Conventional technology]

As is well known, a small sauna is equipped with a stove (heating device) inside the bathing room, and the stove is used to heat the room. This stove uses an electric heater, and the heat generated by the heater heats the room through natural convection.

[Problem to be solved by the invention]

The sauna is equipped with a temperature sensor and a control circuit in the bathing room, and when the indoor temperature reaches a set temperature or higher, the power supply to the electric heater is stopped, and when the temperature does not reach the set temperature, the electric heater is turned off. It can be controlled by supplying power to the heater to heat the room. but,
The temperature sensor may sometimes become inoperable due to a malfunction. In this case, even if the temperature in the room exceeds the set temperature, power continues to be supplied to the electric heater, resulting in an abnormally high temperature in the room, which may lead to a fire.

In view of the above circumstances, it is an object of the present invention to prevent fires from occurring due to operational errors.

[Means to solve the problem]

In order to solve the above problem, the sauna according to the invention according to claim 1 includes means for cutting off the supply of power to the electric heater when the temperature in the bathing room exceeds a set temperature, and an alarm at the same time as the cutoff. I try to have a means of emitting it.

In the sauna according to the second aspect of the invention, the means for cutting off the supply of electric power consists of two means that operate at different temperatures.

[For production]

If there is a means for cutting off the power supply to the electric heater when the temperature in the bathing room exceeds the set temperature, and a means for issuing an alarm at the same time as the cutoff, it is possible to prevent the temperature sensor from malfunctioning even if it does not operate. This will not only stop the electric heater from working, but also alert people nearby that something is wrong. Double safety can be achieved if the means for cutting off the power supply consists of two means operating at different temperatures.

〔Example〕

Hereinafter, embodiments of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 2 shows an embodiment of the sauna according to the present invention, with a part of the wall cut away. This sauna is of a compact type for use by a small number of people, and is equipped with an m (not shown), a shelf 7, etc. on the front, and can be installed in a general household. The inside of the bathroom 6 is heated by an electric hot spring 9 placed within a stove enclosure 8. A sauna stone (not shown) may be placed on top of the electric stove 9 to relieve the radiant heat. Front wall of bathing room 6 10. Rear wall surface 11. Side wall surface 12. On the ceiling surface 13 and the floor surface 14, interior drainboards made of a narrow plate material with the longitudinal direction horizontal are attached. This drainboard is usually made of solid wood, such as spushis. A chair 15 is provided on the rear wall surface 11 and the side wall surface 12 so as to be brought close to each other.

Fig. 1 shows an example of the electric circuit of the sauna electric stove 9. This electric circuit indicates a state in which the electric stove 9 is not operating, that is, a state in which the sauna is not in use.

The electric stove 9 includes two electric heaters H1 and H2, and is provided with an operation control section 5 outside the bathing room that controls the operation of both the electric heaters H1 and H2. The control unit 5 includes a printed circuit board P that includes a temperature indicator 4 that displays the temperature in the bathing room 6 and a relay RYI (not shown). Relay RYI shorts terminals 1 and 3 when the bathing room interior 6 is heated above the set temperature, and shorts between terminals 1 and 2 when the temperature is lower than the set temperature.
In Figure 0, the sauna is not in use and the temperature inside the bathing room 6 is at a temperature lower than the set temperature. Therefore, terminal 1 and terminal 2 are short-circuited. When a timer set knob (not shown) is set to close the timer contact Ta and the power switch SWI is closed, current flows through the timer coil T and relay coil RY3. When a certain period of time elapses after current flows through the timer coil T, the contact Ta automatically opens. In other words, the power source is opened, thus preventing forgetting to turn off the sauna.

When current flows through relay coil RY3, contact RY3a closes, and current flows through coil MC1 and coil MC2. This closes contacts MC1a and MC2a, and power is supplied to electric heaters H1 and H2. That is, the inside of the bathroom 6 is heated by the two electric heaters H1 and H2, so the temperature of the inside of the bathroom 6 is quickly raised.

When the temperature inside the bathroom 6 rises to the set temperature, the temperature sensor TH installed in the bathroom 6 senses this and sends the signal to the printed circuit board P. Due to this,
The short-circuit between terminals 1 and 2 of relay RYI (not shown) is opened, and the terminals 1 and 3 are short-circuited. From this, the flow of current to coils MCI and MC2 is stopped, and contact MC1a.

Since MC2a opens, the power supply to both electric heaters H1 and H2 is stopped, and the electric heaters H1 and H2 stop supplying power to the inside of the bathing room 6.
heating is stopped. At the same time, relay coil RY
2, so the contact RY2a closes and the contact RY2a closes.
2b opens. Depending on the temperature of the bathing room 6, the terminal 1
Since either terminal 2 or terminal 1 and terminal 3 are short-circuited, current always flows through relay coil RY2 when contact RY2a is once closed as described above. Therefore, the state in which the contact RY2a is closed and the contact RY2b is open is maintained. During that time, when the temperature inside the bathroom 6 becomes lower than the set temperature, the terminal 1 of the relay RYI is short-circuited with the terminal 2, and current flows through the coil MCI, so the contact MC1a closes and the electric heater H
1 is supplied with power. At this time, since contact RY2b is held open, coil MC2
No current flows through. That is, electric heater H
2 is maintained in a state in which no power is supplied to it.

Then, the inside of the bathroom 6 is heated to the set temperature only by the electric heater H1. When the temperature inside the bathroom 6 reaches the set temperature, as described above, the terminal 1 of the relay RY1 is short-circuited with the terminal 3, and the flow of current in the coil MC1 is stopped. Therefore, the contact MC1a opens and the operation of the electric heater H1 is stopped. Thereafter, the electric heater H1 is repeatedly activated and deactivated depending on the temperature in the bathroom 6. In addition, inside the bathing room 6
The light is turned on by closing the light switch SW2.

By the way, the bathing room interior 6 is equipped with a thermostat THM and a temperature fuse TF. these are,
It is a device for preventing excessive temperature rise in the bathing room 6, and also serves as an excessive temperature rise alarm device. When the temperature inside the bathroom 6 rises to, for example, 150°C, the thermostat THM turns on the electric heaters H1,
Cut off the power supply to H2 and activate the double warning buzzer BZ. Temperature fuse TF is set at thermostat 6 in the bathing room.
-Temperature higher than THM set temperature, e.g. 170°C
When the temperature rises to , the electric power to the electric heaters H1 and H2 is cut off by fusing.

As described above, the sauna according to the present invention includes means for cutting off the power supply to the electric heater when the temperature in the bathing room exceeds a set temperature, and means for issuing an alarm at the same time as the cutoff. Therefore, even if the temperature sensor fails and does not operate, the electric heater will not only stop operating, but also notify people nearby that there is an abnormality. If, as in the embodiment described above, the means for cutting off the power supply consist of two means operating at different temperatures, for example a thermostat and a temperature fuse, double safety is achieved.

〔Effect of the invention〕

Since the sauna according to the present invention is configured as described above, fires will not occur due to operational errors.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing an embodiment of the sauna according to the present invention, and FIG. 2 is a perspective view of the interior of the sauna according to the embodiment. 5...Control unit 6...Inside bathing room Hl, H2...
Electric heater TH...Temperature sensor THM...Thermostat BZ...Buzzer TF...Temperature fuse agent Patent attorney Takehiko Matsumoto 2 days

Claims (2)

[Claims] (1) In a sauna equipped with an electric heater as a heat source,
A sauna characterized by comprising means for cutting off the supply of power to the electric heater when the temperature in the bathing room exceeds a set temperature, and means for issuing an alarm at the same time as the cutoff. (2) The sauna according to claim 1, wherein the means for cutting off the supply of electric power consists of two means operating at different temperatures.