JPS62155444A - Steam generator for electric heating cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to an improvement in a steam generating device for an electric cooking device that uses steam, such as a steam oven toaster or an electric steamer. This conventional rice steam generator, which is the object of the improvement of the present invention, will be explained with reference to FIG. 1 has a water tank 2 on the top and a drain pipe 3 on the bottom.
A drain valve 6 is provided at a drain port 4 provided on the bottom surface of the water tank, which is pushed up by a spring 5 and biased to open the drain port 4. Reference numeral 7 denotes an operating shaft provided on the bottom of the water tank 2. When a full amount of water 2 is placed on the water tank 1, the operating shaft 7 pushes down the drain valve 6 against the spring 5 to close the drain port 4. . Reference numeral 8 denotes a drainage container that accommodates the drainage discharged from the drainage pipe 3. 9 is a water supply valve that is energized to always close a water supply port (not shown) provided at the bottom of the water tank 2;
When a quantity of water / 2 is placed on the water tank 1, when the protrusion 10 provided on the water tank 1 comes into contact with it, the water supply valve 9 opens the water supply port of the water tank 2 (not shown) and opens the water tank 2. The water inside is allowed to flow down into the water tank 1. 11 is a boiler equipped with a heater, and 12 is a steam supply port that supplies generated steam to the heating cooking chamber.

Next, its effect will be explained. The filled water tank 2 is set in the water supply tank 1 and the heater switch of the boiler 11 is turned on. When the water tank 2 is set in the water tank 1, the operating shaft 7 acts on the drain valve 6 to close the drain port 4 of the water tank, and the water tank 1 is supplied with water from the water tank 2 through the water supply valve 9. The water level reaches the required water level in the boiler and the boiler 11 generates steam. The amount of water in the water tank 1, which decreases with the generation of steam, is replenished from the water tank 2, and the water tank 1 maintains a constant water level necessary for the boiler 11. When the water pressure in the water tank 2 drops to a level that cannot maintain the required water level in the boiler 11 and the generation of steam decreases, the heater switch of the boiler 11 is turned off and water is replenished into the water tank 2.

By the way, in the above conventional device, the drain valve 6 of the water tank 1 closes the drain port 4 by pushing down the operating shaft 7 of the water tank 2 against the elastic force of the spring 5.
The pressing force is determined by the weight of the water tank 2. Therefore, when the amount of water in the water tank 2 decreases and its weight decreases, water leaks from the drain port 4. On the other hand, the amount of water replenished into the water tank 1 by the water supply valve 9 is sufficient to compensate for the decrease in the amount of water in the water tank 1 due to the supply of steam. The water level rapidly decreases, making it impossible to supply the necessary boiler water to the boiler 11, and - making it difficult for the boiler 11 to normally supply steam. Since the heater switch of the boiler 11 is turned on at the same time as the water tank 2 is set, the boiler will be emptied if there is insufficient water in the boiler. Opening this boiler will not only damage the equipment but also pose a risk of burns. This phenomenon may occur if the water tank 2 moves due to vibration while using this device.
Alternatively, it may also occur if the water tank 2 is accidentally removed. An object of the present invention is to provide a steam generating device for an electric cooking device having a structure in which such a phenomenon does not occur.

[Structure of the Invention] The steam generating device for an electric heating cooking device of the present invention has a structure in which a steam generating device for generating steam to be supplied to a heating cooking chamber is provided adjacent to the heating cooking chamber, wherein the steam generating device is , a water tank having a water supply port with a water supply valve, a water tank having a drain port with a drain valve at the bottom and accommodating the water tank therein, and a boiler connected to the water tank by a passage. and a manual holding lever for fixing the water tank inside the water supply tank; when the water tank is accommodated in the water supply tank and fixed by the holding lever, the drain valve is , characterized in that the drain port is closed regardless of the presence or absence of water in the water tank.

Embodiments of the present invention will be described with reference to FIGS. 1 to 4. FIGS. 1 and 2 show the overall structure of an electric cooking device equipped with a steam generator according to the present invention. In the same figure,
Reference numeral 21 designates an outer wall of the main body having a cut-out cross section with an open front, both sides, and bottom, side plates n1 on both sides, and a bottom plate n fixed to the bottom surface to form the main body. The open front of this main body is sealed by a door plate that can be opened and closed and a front panel plate 5,
Behind the door plate forms a heating cooking chamber 2'7 surrounded by the internal wall plate, and behind the front panel plate δ is a steam generator! It accommodates 28. Numeral 4 is a heater for cooking, numeral 4 is a food mounting table, numeral 31 is a waste tray, and numeral 32 is a soup tray.

Next, the structure of the steam generator will be explained with reference to FIGS. 3 and 4. In the same figure, O is a water tank that accommodates a water tank with a water supply cylinder inside, and the water supply cylinder has a
A water supply valve is provided which is biased by a spring 36 so as to always close the water supply port. A boiler 39 has a heater 40 and a steam supply port 41, and communicates with the water tank and a passage 42. A drain valve 45 is provided at the bottom of the water tank and is biased by a spring 43 to keep the drain port 44 open at all times. Reference numeral 46 denotes an operating shaft attached to the drain valve 45. When the valve shaft 47 between the water supply valves comes into contact with the tip of the operating shaft 46, the operating shaft 46 pushes down the drain valve 45 to close the drain port 44, and at the same time, the water supply starts. The water supply port 37 is opened by pushing up the valve valve, so the spring of the water supply 9P38 is also stronger than the spring 43 of the drain valve 45.

48 is a time switch, 49 is a push button for operation, and the blade is a handle.

A feature of the present invention is that a holding lever 51 is provided for fixing the water tank to the water supply tank. This holding lever 51 has a hook portion 52 that engages with the upper end of the water supply cylinder 34, a knob portion 53 that is operated with a fingertip, and an intermediate portion 54 that connects the hook portion 52 and the knob portion 53. It has a type structure and is rotatably attached to the water tank 33 by a spring 55.The water tank 35 is placed on the water tank and the hook part 52 of the holding lever 51 is attached.
When the tip of the water tank is engaged with the upper end of the water tank, the water tank is elastically fixed by the water tank spring 55.

Next, its effect will be explained. When a full water tank is placed on the water tank A and the tip of the hook 52 of the holding lever 51 is engaged with the upper end of the water cylinder 34 to fix the water tank on the water tank A, the valve shaft 47 of the water valve opens. comes into contact with the operating shaft 46 of the drain valve 45 to open the water supply valve and close the drain valve 45, and the water from the water tank enters the water supply tank 33 and further passes through the passage 42 into the boiler 39. The water pressure in the boiler 39 is balanced with the water pressure in the water tank, and the boiler 39 maintains the required constant water level. Steam generated by heating the heater 40 is supplied to the heating cooking chamber from the steam supply port 41, and boiler water that has decreased due to the supply of steam is replenished from the water tank. When the cooking is finished and you want to drain the water, press the knob 53 of the holding lever 51 with your fingertip, and the hook 52 will disengage from the water tank rear, allowing you to open the water tank and release it against the water tank. When the water tank I is removed from the water tank Okara, the spring 43
pushes up the drain valve 45 to open the drain port 44, and all the water in the water tank and boiler 39 is discharged from the drain port 44.

[Effects of the Invention] As described above, in the steam generator of the present invention, when the water tank is accommodated in the water supply tank and fixed to the water tank by the holding lever 51, the spring 36 of the water supply valve is can push down the operating shaft 46 against the spring 43 of the drain valve 45, so as long as the button/rear is fixed to the water tank by the holding lever 51, regardless of the presence or absence of water in the water tank, The drain valve 45 is closed. Therefore, there is no risk of water leaking from the drain valve during use of this electric heating cooker, which has the effect of achieving the object of the invention.

[Brief explanation of drawings]

Figure 1: An overall perspective view of an electric heating cooker equipped with the steam generator of the present invention Figure 2: A sectional view of the electric cooker of Figure 1 3N: A cross section of an embodiment of the steam generator of the present invention Figure (Enlarged view of the right part of Figure 2) Figure 4: Side view of the steam generator shown in Figure 3 Figure 5: Diagram showing the conventional steam generator n...Heating cooking chamber, 4...・Steam generator,...
Water tank, ah...water tank, 37...water inlet, ah...
・Water supply valve, 39...boiler, 42...passage, required...
・Drain port, 45...Drain valve, 51...Holding lever 1111 □J+I Attorney Masanobu Shibasaki, -1-I1

Claims (1)

[Claims] In a structure in which a steam generator that generates steam to be supplied to a heating cooking chamber is provided adjacent to the heating cooking chamber, the steam generator includes a water tank having a water supply port equipped with a water supply valve;
a water tank having a drain port with a drain valve at the bottom and accommodating the water tank therein; a boiler connected to the water tank by a passage; the water tank being placed inside the water tank; When the water tank is housed in the water supply tank and is fixed by the holding lever, the drain valve operates regardless of the presence or absence of water in the water tank. A steam generator for an electric heating cooker, characterized in that the drain port is closed.