JPH0351185B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a sauna that heats a room using an electric stove.

[Background technology]

As is well known, small Saus are equipped with a stove (heating device) inside the cabin, which heats the interior. This stove is equipped with an electric heater,
Those that use natural convection to heat the room are commonly used.

In this kind of natural convection sauna, after heating starts,
The problem was that it took a very long time to reach the set temperature. For example, it takes more than 30 minutes to heat the sauna room to 80 degrees Celsius, so there was a desire to shorten the waiting time for bathing.

In order to solve the above problem, it is conceivable to increase the capacity of the electric heater. However, when such a large-capacity electric heater is used, it is difficult to maintain the set temperature in the sauna room, and there is a problem in that the temperature difference between the upper and lower limits becomes large in controlling the set temperature. Further, by constantly operating the electric heater, a large amount of electric power is consumed, increasing the operating cost of the sauna. Heating the sauna room using a large-capacity electric heater also poses the problem of giving shock to the body of the bather because the bather receives excessive thermal stimulation.

[Purpose of the invention]

This invention was made in view of the above-mentioned circumstances, and even if the radiant heat of the stove is of the natural convection type, after the heating of the sauna room starts, the temperature quickly rises to the set temperature, and the sauna waits for the bath time becomes shorter,
Further, it is an object of the present invention to provide a sauna that reduces operating costs, allows temperature adjustment with high precision to the set temperature, and does not give shock to bathers' bodies due to excessive heat stimulation.

[Disclosure of the invention]

In order to achieve the above object, the present invention includes two electric heaters as heat sources, and after heating starts, the two electric heaters are operated until a certain temperature is reached to increase the temperature in the sauna room,
The gist of the sauna is that the sauna is equipped with a control unit that operates both electric heaters so that the temperature inside the sauna room is adjusted using only one of the electric heaters after reaching a certain temperature.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.

FIG. 3 shows the interior of one embodiment of the sauna according to this invention. This sauna is equipped with a door (not shown), a shelf 7, etc. on the front, and is a compact type for use by a small number of people, which can be installed in a general household. The sauna room 6 is heated by an electric stove 9 located within a stove enclosure 8. A sauna tone (not shown) may be placed on top of the electric stove 9 to reduce the radiant heat. Front wall 10, rear wall 11, side wall 12, ceiling 13 of sauna room 6
An interior drainboard made of a narrow board with its longitudinal direction horizontal is attached to the floor surface 14. This drainboard is usually made of solid wood such as spruce. A chair 15 is provided on the rear wall surface 11 and the side wall surface 12, close to each other.

FIG. 1 shows an example of the electric circuit of the sauna electric stove 9. This electric circuit represents a state in which the electric stove 9 is not operated, that is, a state in which the sauna is not in use.

The electric stove 9 includes two electric heaters H.
1 and H2, and an operation control unit 5 outside the sauna room that controls the operation of both the electric heaters H1 and H2.
It is equipped with This control unit 5 includes a temperature display 4 that displays the temperature in the sauna room 6 and a relay RY1.
(not shown). Relay RY1 operates so that terminals 1 and 3 are short-circuited when the sauna room 6 is heated to a temperature higher than the set temperature, and terminals 1 and 2 are short-circuited when the temperature is lower than the set temperature. Temperature settings are made by a variable temperature regulator VR. In the figure, the sauna is not in use, and the temperature in the sauna room 6 is lower than the set temperature. Therefore, terminal 1 and terminal 2 are short-circuited. Set the timer set knob (not shown) and connect the timer contacts.
When Ta is closed and power switch SW1 is closed, current flows through timer coil T and coil RY3.
When a certain period of time passes after current flows through timer coil T, contact Ta automatically opens. In other words, the power supply is opened. Therefore, forgetting to turn off the sauna is prevented. coil
When current flows through RY3, contact RY3a closes, and current flows through coil MC1 and coil MC2. As a result, contacts MC1a, MC
2a is closed, and power is supplied to the electric heaters H1 and H2. That is, the sauna room 6 is heated by two electric heaters H1 and H2. Therefore, the temperature of the sauna room 6 is quickly raised. When the temperature of the sauna room 6 rises to the set temperature, the temperature sensor TH installed in the sauna room 6 senses this and sends the signal to the printed circuit board P. This opens the short-circuit between terminal 1 and terminal 2 of relay RY1, and short-circuits terminal 1 and terminal 3. As a result, the flow of current to the coils MC1 and MC2 is stopped, and the contacts MC1a and MC2a are opened, so that the supply of power to both electric heaters H1 and H2 is stopped. Heating of the sauna room 6 by the electric heaters H1 and H2 is stopped. Also, since current flows through coil RY2, contact RY2a closes and contact RY2b
opens. Since either terminal 1 and terminal 2 or terminal 1 and terminal 3 are short-circuited, current always flows through coil RY2. Therefore, the state in which the contact RY2a is closed and the contact RY2b is open is maintained. When the temperature in the sauna room 6 becomes lower than the set temperature, the terminal 1 of the relay RY1 is short-circuited to the terminal 2. By this,
Since current flows through coil MC1, contact MC1a
is closed, and power is supplied to the electric heater H1. Since contact RY2b is held open, no current flows through coil MC2. That is, a state in which no power is supplied to the electric heater H2 is maintained. sauna room 6
is heated to the set temperature only by the electric heater H1. When the sauna room 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. Below, sauna room 6
As the temperature rises and falls, the electric heater H1 is repeatedly activated and deactivated. In this way, electric heater H1
Since the temperature is adjusted by just changing the temperature, only a small amount of power is consumed, and the temperature can be finely adjusted. In addition, since there is no sudden temperature change in the sauna room 6,
The shot does not have any adverse effects on the bather's body. The lighting L in the sauna room 6 is turned on by closing the lighting switch SW2. The sauna room 6 is also equipped with a thermostat THM and a temperature fuse TF. these are,
This is a device for preventing excessive temperature rise in the sauna room 6. When the temperature in the sauna room 6 rises to, for example, 15° C., the thermostat THM cuts off the power supply to the electric heaters H1 and H2 and activates the alarm buzzer BZ.
The temperature fuse TF indicates that the temperature in the sauna room 6 is higher than the set temperature of the thermostat THM, e.g.
When the temperature rises to 170℃, electric heaters H1 and H2
Cut off the power supply to the Therefore, even if the temperature sensor TH or the like malfunctions, this sauna is extremely safe because the temperature in the sauna room is prevented from rising excessively, and no fire will break out.

Next, a sauna equipped with a control system shown in a block diagram as shown in FIG. 2 can also be considered.

This sauna is equipped with two electric heaters H3 and H4 as heating devices for heating the interior of the sauna room, and automatic temperature controllers A and B are connected to each electric heater H3 and H4. For example, the set temperature of automatic temperature controller A is
The temperature is set at 100°C, and the temperature of the other automatic temperature controller B is set at 80°C, for example. In this way, when heating starts in the sauna room, the two heaters H3,
It is rapidly heated to 80°C using H4, and then heated to 100°C using only heater H3. When a sauna having such a control system is used, the interior of the sauna room is heated very quickly, so the waiting time for bathers can be shortened, which is very convenient. Even if the sauna door is opened and cold outside air enters the sauna room, causing the temperature inside the sauna to drop rapidly, the two heaters H3 and H4 will continue to operate until the temperature reaches 80°C. Since the temperature is slightly heated, this reduces the possibility of adverse effects on the body of the bather.

Note that the automatic temperature controller B may be a temperature controller B' such as a thermostat. Also,
The electric capacity of the heater H4 is larger than that of the heater H3, which is effective in shortening the bathing waiting time and reducing operating costs. As the heaters H3 and H(4), sheathed heaters, ceramic heaters, etc. can be used.

However, unlike the sauna of the present invention, in the sauna of FIG. 2, when the temperature drops below the lower set temperature of the automatic temperature controllers A and B, both heaters operate simultaneously, causing the bather to Since the sauna receives excessive thermal stimulation, it is less safe than the sauna of this invention and cannot be said to be practical.

〔Effect of the invention〕

As detailed above, the sauna of this invention has two
Two electric heaters are provided as heat sources, and after heating starts, the two electric heaters are operated to raise the temperature in the sauna room until a certain temperature is reached, and after reaching a certain temperature, only one of the electric heaters is activated. Since the sauna is equipped with a control unit that operates both electric heaters to adjust the temperature in the sauna room and keep the other electric heater in a stopped state, it is possible to achieve many effects at the same time, such as those described below.

Effect: The sauna room can quickly reach the set temperature. This is because two electric heaters are used to supply a large amount of heat into the sauna room until the set temperature is reached.

Effect: Reduces operating costs. this is,
This is because the two heaters are not always activated and are appropriately controlled by the control unit.

Effect: Highly accurate control of set temperature can be achieved. A single large-capacity heater generates too much heat even if you try to make subtle adjustments, making it difficult to control accurately, but in the case of this invention, once the set temperature is reached, the total amount of heat is equivalent to that of one large-capacity heater. This is because only one of the two heaters is used to adjust the temperature, so it is possible to generate heat in an amount that corresponds to the delicate adjustment.

Effect: There is no need to worry about bathers receiving excessive heat stimulation while bathing. This is because the other electric heater continues to remain stopped after reaching the set temperature.
This is because the two electric heaters are never turned on at the same time during bathing.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of a sauna according to the present invention, Fig. 2 is a block diagram showing a control system of a heating device for another sauna, and Fig. 3 is a perspective view showing the interior of an embodiment of the sauna. . 5...Control unit, 6...Sauna room, H1, H2...Electric heater, VR...Variable temperature controller, TH...Temperature sensor.

Claims (1)

[Claims] 1 Equipped with two electric heaters as heat sources, and after heating starts, until a certain temperature is reached, the
The two electric heaters are operated to raise the temperature in the sauna room, and after reaching a certain temperature, the temperature in the sauna room is adjusted using only one electric heater, and the other electric heater continues to be stopped. A sauna equipped with a control unit that operates both electric heaters.