JPS5850728B2 - steam oven - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steam oven, and particularly to a water supply tank thereof, and its purpose is to reliably supply water to a boiler.

In order to achieve this object, the present invention aims to improve the drain port portion of the water supply tank, and one embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 in FIG. 1 denotes a steam oven main body, which has a heat insulating space A inside and is also equipped with a heating chamber, a control section, etc., although not shown.

A boiler 2 supplies steam to the heating chamber, and is equipped with a heating element 3 and is connected to a water receiver 10 by a U-shaped pipe 4.

Further, a drain plug 5 is provided in a part of this U-shaped pipe 4 so that residual water in the boiler 2 can be discharged as necessary.

6 is a storage box for the cartridge type water supply tank 7.

As shown in FIG. 2, the water supply tank 7 is a cylindrical body that has a male threaded portion 81 on its outer periphery on a part of its bottom surface, and that the inside is connected to the space inside the water supply tank T and has an open opening at the extreme end. A drain port 82 is provided.

9 is a water tap, which is shaped like a truncated cone. A U-groove 92 having a female threaded portion 91 screwed into the male threaded portion 81 is provided concentrically with the movable valve 12 on its large diameter side.

Further, a ring-shaped packing 94 is provided at the bottom 93 of the U groove 92,
Further, a hollow cylinder 98 is formed on the inner diameter side of the U-groove 92 and contacts the movable valve 12 at its circumference, and this structure ensures watertightness between the hollow cylinder 98 and the drain port 82 of the water supply tank 7.

Further, a support portion 97 of the movable valve 12 having a cylindrical space 95 on the outer diameter side of the sled and a through hole 96 and a hollow cylinder 98 of this support portion 97 are connected to the water supply tank 7 via the movable valve 12. ing.

The movable valve 12 has a hemispherical shape whose outer surface abuts against the upper part of the valve port 99 of the hollow cylinder 98 to maintain watertightness. A washer 123 is provided, and a compression spring 122 is provided between the washer 123 and the support portion 97 of the movable valve.

Then, the movable valve 12 is moved upward by the protruding piece 101 provided on the water receiver 10, and the movable valve 12 is moved upward into the water tank 7 and into the water receiver 110.
A drainage channel is formed between the two.

The water receiver 10 forms a U-shaped pipe with the boiler 2, and the water level of the water receiver 10 serves to determine the water level of the boiler 2, and one end of the movable valve 12 is pushed up at the center of the water receiver 10. A protruding piece 101 is provided.

In the above configuration, when the water supply tank 7 is attached to the storage box 6, the movable valve 12 is pushed up by the protruding piece 101, and the water inside is discharged to the water receiving part 10.

The water discharged into the water receiving part 10 fills the boiler 2 and the water level rises until it reaches line A in Figure 2, where air 15 can no longer be sucked in and drainage stops, keeping the water level constant.

Thereafter, as steam is generated in the boiler 2, the water level decreases from line A, and when the water level reaches line B, air 15 is sucked in again and drained.

In this way, the air and water in the water supply tank 7 are exchanged, and draining and stopping are alternately repeated at appropriate intervals.

However, once the air is sucked into the faucet 9, the surface tension of the water causes spherical bubbles to form as shown in FIG.

Therefore, in the drainage channel, the constriction 1 as in the conventional example shown in Fig.
If T is formed, the air bubbles become stagnant in this part and drainage stops, and as a result, the water level decreases as shown by line C.

That is, in the conventional type, when the movable valve 12 is raised to its highest position, the gap E' between the movable valve 12 and the drain port 82 is smaller than the gap D' between the movable valve 12 and the valve port 99, and as a result, As a result, air was not allowed to enter the water supply tank 7, and as a result, drainage was stopped.

On the other hand, in the present invention, as shown in FIG. Since the gap is made equal to or larger than the minimum gap with the upper part of the opening 99, the inflow of air 15 does not stop and the drainage does not stop, and water supply is always carried out smoothly.

As a result, water at a predetermined level is always present in the boiler 2, and it is possible to prevent the boiler 12 from running dry.

As described above, according to the present invention, water is smoothly supplied from the water supply tank to the boiler, so it is possible to prevent dry cooking in the boiler, and of course, stable steam can be supplied into the heating chamber. .

Further, since the configuration is extremely simple as described above, it can be provided at low cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a steam oven according to an embodiment of the present invention, FIG. 2 is a sectional view of a main part of the same oven, and FIG. 3 is a sectional view of a main part of a conventional example. 1... Steam oven body, 2...
Boiler, 6... Water tank, 82...
Drain port, 9... Water tap, 99... Valve port, 12... Movable valve.

Claims (1)

[Claims] 1 A steam oven main body, a heating chamber provided in this main body, a boiler that supplies steam into this heating chamber, and a cartridge-type water supply tank that supplies water to this boiler, and has a bottom surface O of the water supply tank. This water tank is provided with a drain port that protrudes downward, and a hydrant is attached to this drain port. and a movable valve that is freely provided and closes the valve port when the valve is at its lowest position;
The minimum gap between the outer surface of the movable valve and the inner surface of the joint between the water tank and the water tank at the upper end of the drain port when the movable valve is raised to its highest position is the minimum gap between the outer surface of the movable valve and the upper part of the valve port. A steam oven characterized by having a gap that is equal to or larger than the gap.