JPH073129Y2 - Tank device for steam generation - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] This invention is, for example, a meat bun,
The present invention relates to an optimal steam generation tank for use in a steamer for steaming Chinese steamed buns such as bean paste.

This type of steam generating tank device is provided on the lower side of the case body 1 in which the Chinese steamed bun is placed.
FIG. 3 shows a conventional device. In this conventional tank device, an evaporation tank 2 and a storage tank 3 are provided, and portions of these tanks 2 and 3 near the bottom are connected by a pipe 4 so that their water levels are always the same. Also, the evaporation tank 2
A heater 5 is provided in the evaporation tank 2 and the heat generated by the heater 5
It tries to evaporate the water stored in. And
The evaporation tank 2 has a volume smaller than that of the storage tank 3 to improve thermal efficiency. However, since the evaporation tank 2 and the storage tank 3 are connected by the pipe 4 as described above, the substantial volume of the evaporation tank 2 is equal to the volume of the storage tank 3. Further, a float switch 6 is provided in the storage tank 3, and a switch (not shown) of the heater 5 is turned off when the water level in the storage tank 3 becomes a certain value or less.

[0003]

In the conventional apparatus as described above, the evaporation tank 2, the storage tank 3 and the pipe 4 are connected to each other to keep their water levels the same. A few must be placed at the same level. In this way, if the two tanks 2 and 3 are made to have the same level and a sufficient volume is to be ensured, the depths of the tanks 2 and 3 must be increased. This is because, in the case where the area of the bottom of the steamer for steamed steamed buns is restricted, such as a steamed steamed steamed steamed bun steam, if one tries to secure a sufficient volume, the height, that is, the depth must be deepened. . However, if the depth is increased while the bottom area is reduced, there is a problem that it is difficult to put a hand in the evaporation tank 2 having a particularly small volume, and cleaning is difficult accordingly.

Further, the evaporation tank 2 and the storage tank 3 are connected to the pipe 4.
Therefore, impurities in the evaporation tank 2 may enter the storage tank 3 and adversely affect the operation of the float switch 6. In particular, when meat buns are put in the case body 1, the water droplets cooled in the case body 1 contain a large amount of oil. When the water drop containing the oil drops into the evaporation tank 2, it flows into the storage tank 3 through the pipe 4, but the oil sometimes impairs the conductivity of the float switch 6. Therefore, in this conventional tank device, the float switch 6 does not function even when the water level in the storage tank 3 drops below a set value, and the evaporation tank 2 is in a so-called fired state. An object of the present invention is to provide a tank device for steam generation in which the bottom can be made shallow and a sufficient volume can be ensured, and an electric control system also operates properly.

[0005]

According to the present invention, a bottom raising portion located at the same level as or slightly lower than the target water level is formed in the bottom portion of an evaporation tank provided with a heating element. A heater for water level detection is installed on the back side, and a temperature sensor is installed adjacent to this heater, while a storage tank is connected to this evaporation tank via a pump, and a pump is generated according to the output signal from the temperature sensor. Operates to replenish the water in the storage tank to the evaporation tank, and moreover, in the storage tank,
It is characterized in that a float switch is provided to prevent the energization of the heating element of the evaporation tank when the water level falls below a certain value.

[0006]

Since the present invention is constructed as described above, the temperature of the bottom raising part heated by the water level detecting heater rises as the water in the evaporation tank decreases and the water level approaches the bottom raising part. . When this temperature exceeds a set value, the temperature sensor senses it and the pump operates according to the output signal of the temperature sensor at this time to replenish the water in the storage tank to the evaporation tank.

According to the steam generating tank device of the present invention, the evaporation tank and the storage tank having the float switch are not exposed in the evaporation tank without exposing the water level detecting heater and the temperature sensor. Since the connection is made via a pump, the float switch is not affected by the oil content contained in the water in the evaporation tank. Further, since it is not necessary to provide the evaporation tank and the storage tank at the same level, it is possible to position both of them above and below. Therefore, even if the depth of the evaporation tank is made shallow, a sufficient volume can be secured and the heat efficiency of the heating element can be kept good.

[0007]

Embodiment The embodiment shown in FIG. 1 is provided with an evaporation tank 12 and a storage tank 13 on the lower side of a case body 1 similar to the conventional one. The evaporating tank 12 has a bottom portion 14 in the shape of a donut, which is a raised portion 15 in which the center portion of the bottom portion 14 is raised more than other portions. Donut-shaped bottom part 1
An electric heating element 16, which is the heating element of the present invention, is provided on the back side of No. 4. A pair of water level detection heaters 17 are provided on the back side of the raised bottom portion 15, and a temperature sensor 18 is provided between the two heaters 17. further,
The storage tank 13 is provided with a float switch 19 for detecting its water level.
Is to prevent the energization of the electric heating element 16 when the water in the storage tank 13 decreases and reaches a dangerous water level.

The evaporation tank 12 and the storage tank 13 as described above
Is connected via a pump 20, but this pump 20 operates based on the output signal of the temperature sensor 18 when the temperature of the bottom raising part 15 exceeds a set value.
When the pump 20 operates in this way, the water in the storage tank 13 is sucked up and the water is replenished from the replenishment port 21 to the evaporation tank 12. The supply port 21 of the evaporation tank 12 is formed at a position higher than the maximum target water level. By doing so, it is possible to prevent the supply port 21 from being clogged with impurities or the like in the evaporation tank 12.

Next, the operation of this embodiment will be described. The evaporation tank 12 is filled with water up to the maximum target water level which is slightly higher than the bottom raised portion 15. When the electric heating element 16 is energized to generate heat in this state, the water in the evaporation tank 12 is evaporated and supplied to the case body 1. As the water in the evaporating tank 12 evaporates, the water level decreases, and the less water on the surface of the bottom raising part 15, the higher the temperature of the bottom raising part 15 heated by the water level detecting heater 17 rises. The temperature sensor 18 detects. And the bottom raising part 15
When the temperature becomes higher than the set value, the pump 20 operates according to the output signal of the temperature sensor 18 at that time to replenish the water in the storage tank 13 to the evaporation tank 12.

As the water is replenished in this way, the bottom raising part 15
If the water is submerged in water, the temperature will drop again.
Stops. If such replenishment of water is repeated, the amount of water in the storage tank 13 will decrease, but if it reaches a dangerous water level,
The float switch 19 operates to block the energization of the electric heating element 16. Therefore, it is sufficient to add water to the storage tank 13 at this time. In any case, according to this embodiment, since the evaporation tank 12 and the storage tank 13 are connected via the pump 20, the water on the evaporation tank 12 side does not flow back into the storage tank 13. Therefore, the case body 1
Since the water containing the oil that has fallen from the side does not flow into this storage tank, the operation of the float switch 19 of the storage tank 13 is not disturbed by the oil or the like.

Further, since the water in the storage tank 13 is positively pumped up by the pump 20 and supplied to the evaporation tank 12, the evaporation tank 12 and the storage tank 13 can be at the same level as in the conventional case. The constraint of fooling around is gone. Therefore, the evaporation tank 12 and the storage tank 13 can be positioned vertically. Since both tanks 12 and 13 can be vertically positioned in this manner, the bottom areas of both tanks 12 and 13 can be kept to the maximum. In this way, the bottom area can be kept to the maximum,
The opening areas of the evaporation tank 12 and the storage tank 13 can be made large. Especially, since water containing oil drops into the evaporation tank 12,
Although it has to be washed frequently, the opening area can be made sufficiently large as described above, so that the washing work while putting a hand there is also easy.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of this invention.

FIG. 2 is an explanatory diagram showing a conventional device.

[Code]

 12 Evaporating Tank 13 Storage Tank 14 Bottom 15 Bottom Raising Part 16 Electric Heater as Heating Element 17 Water Level Detection Heater 18 Temperature Sensor 19 Float Switch 20 Pump

Claims (1)

[Scope of utility model registration request] 1. A bottom raising part is formed at the bottom of an evaporation tank provided with a heating element, and a water level detecting heater is arranged on the back side of the bottom raising part and a temperature sensor is provided adjacent to the heater. A storage tank is connected to this evaporation tank via a pump, and the pump operates in response to the output signal from the temperature sensor to replenish the water in the storage tank to the evaporation tank. A tank device for steam generation, characterized in that a float switch is provided to prevent the energization of the heating element of the evaporation tank when the water level falls below a certain value.