SU1758345A1 - Electric stove ring - Google Patents

Abstract

Use: for heat treatment of food products. The invention: a burner comprises a composite case made of the lower part 2 in the form of a glass with an internal thread and the upper part 3 screwed into it with handles 4. The heater 5 with the rod 10 is spring-loaded and mounted movably along the case. The lower end of the spring 7 is fixed relative to the upper part 3 of the housing, and the stem 10 with its side surface interacts with the switch for the power supply circuit of the heater 5. At the ends of the spring 7 it is possible to install spacing washers 8 and 9. Preferably, the stem 10 is provided with a through-hole 11 and the handles 4 , washers 8 and 9 and rod 10 from a material with low thermal conductivity. 3 hp ff, 2 ml,

Description

The invention relates to heat engineering, and more specifically, to the arrangement of cooking stoves with electric hotplates used in everyday life and in catering establishments.

The electric stove is known, containing the case of a cylindrical heat chamber and resistive on-wall heaters (heaters), which are counterparts of the burners. Mounted into the chamber of the cooker, the cooking capacity through the lever moves the spring to the stem, which acts on the microswitch button, including the heating elements.

The disadvantage of the analog is the impossibility of adjusting the trigger threshold of the switch depending on the weight of the cooking vessel.

Closest to the inventive object is an electric hotplate, comprising a housing, a vertically movable spring-loaded heater, cooperating with a switch mounted on the housing. Force regulator

the springs are made in the form of a screw, screwed into the burner along its axis from the bottom through an opening in the supporting plane of the element fixedly connected to the body. The screw allows you to adjust the vertical stroke of the burner.

The main disadvantage of the prototype is the impossibility of using the screw as a regulator of the heater response threshold depending on the weight of the installed utensils, since the consumer does not have convenient access to the screw, and, moreover, the known construction does not allow the set position of the adjustment to be visualized and identified. screw. The presence of the screw makes it difficult to disassemble the burner during repair and sanitize internal cavities, which also creates inconvenience during operation.

The aim of the invention is to improve the usability.

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This goal is achieved by the fact that in the proposed electric hotplate the body is made up of upper and lower parts, while the upper part is made with handles of a material with low thermal conductivity and screwed into the lower part, made in the form of a glass with internal thread.

Making the composite part allows the stove to move relative to the movable part of the body, while the switch is placed on the fixed part of the body and ultimately allows the heater trigger threshold to be adjusted in a wide range of dishes weight and, therefore, gives the electric burner properties that do not match. with the properties of well-known technical solutions.

Fig, 1 shows electroring, cut; in fig. 2 - the same, simplified top view.

The hot plate is installed on the lid 1 of the plate and contains a housing consisting of two parts: the lower 2 and the upper 3. The lower part 2, in the form of 1 glass rigidly fixed on the lid, serves as the base of the upper part and has an internal thread and a hole in the bottom. The upper part 3 is made in the form of a double-walled glass, also having a through axial aperture coaxially with a hole in the glass 2. On the external forming surface of the glass 3 has an annular shoulder (flanging). On the collar there are handles 4 of non-heat conducting material evenly spaced around the circumference. Above the glass 3 is placed a heater 5 with an integrated heating element 6, as well as other types of heaters, such as microwave, induction, etc., in addition to heating elements.

The flange of the heater covers the upper part of the glass 3 above the collar so that the latter can serve as a support for the heater. A spring 7 is installed between the bottom of the heater and the bottom of the glass 3, covering the inner wall of the glass 3 over most of its height and is thus centered by it. Replaceable heat insulating washers 8 and 9, for example from reinforced asbestos, serve to adjust the elastic force of the spring 7 and at the same time prevent it from heating above 200-300 C. The same heat insulation layer at the bottom of the heater also serves this purpose (not shown).

The hollow rod 10 of a material with a low thermal conductivity, for example, a textolite, is rigidly connected with its end to the bottom of the heater and is oriented coaxially with the holes in the cups 2 and 3. In the working position, the rod passes through both holes. Through the through hole in the rod from the cup 2 to the element 6, the power cable 11 is connected, which freely sags and does not hinder the vertical movement of the rod along with the heater. In part 2, a microswitch 12 is placed with the ability to interact with the stem, the cooking capacity or other dishes, installed on the burner, is indicated by the position 13, the heat insulating cuff is position 14,

The device works as follows. In the initial state (without dishes), the heater 5 and the rod 10 occupy the position shown in FIG. 1 by the dashed line S. The rounded end of the stem is above microswitch 12, which is open in this position. Due to the elasticity of the spring 7 supporting the heater, the latter is raised above the glass, but so that the end of the flange is no higher than the end of the glass. By rotating the cup 2, which is an adjusting element, the knobs 4 set the required threshold for the device to respond to the weight.

At the locations indicated in FIG. 2 arrows, the lid 1 of the cooker around the burner can have a scale (or a tagging system) up to its graduation in kilograms of the weight of the dish. For ease of adjustment, the scale can be made removable or movable. In the most coarse version, symbols or text inscription indicate in a clockwise direction less weight (twisting the glass downwards), respectively, counterclockwise - more weight. There is in the form that the thread on the cups has a large pitch, and the rotation is adjusted by one of the handles 4, having, for example, a different color or a special mark (red dot). For example, when turning the glass 3 with the heater by the handle relative to the position shown in FIG. 2, by 90 ° clockwise, the initial trigger setting is reduced from 1 to 0.5 kg.

Then install the tank 13 on the heater. The spring 7 is compressed, the heater sags, and ultimately rests through the cuff 14 on the bead of the cup 3. The distance between the level of the immersed heater and the level of the heater lying on the glass determines the maximum stroke amount of the rod. The rod, moving down, acts on the switch 12. The power supply circuit of the element 6 is closed. The power of the heater is regulated by known means.

After cooking, when the container is removed from the hotplate, the stem rises and the heater shuts off. If the consumer left the stove on for a long time, and the contents of the tank began to boil away, the heater gradually rises, and as soon as the weight of the tank due to evaporation of the liquid decreases to the weight of the installation, the burner will turn off. This will happen if the weight of the installation is more than empty dishes.

The proposed electric hotplate design allows the consumer to adjust the shutdown threshold and set it to a minimum reduction in the weight of the cookware, which reduces the loss of the finished product. This is achieved as follows. After installing the dishes on the heater, if it does not lie on the collar with its flange, which is determined visually or by the effect of the spring when pressed from above, the consumer rotates the cup 2 counterclockwise until the burner heater turns off and the signal light on the front panel plate (conventionally not shown) does not go out. Then, when the glass is slowly rotated in the opposite direction, it is fixed in the position immediately after the burner is turned on and the corresponding bulb lights up.

This means that in this position, the contact surface of the switch 12 is in the transition zone of the cylindrical part of the rod to the rounded, and with a slight decrease in weight corresponding to the position of the liquid level in the tank (Fig. 1), the burner is turned off.

One of the advantages of the plate is its high manufacturability and ease of assembly. To remove the burner, simply unplug the connector of the power cable on glass 2 and lift the burner up. At the same time, due to the presence of the flange on the heater, the ingress of dirt and foreign objects into the internal cavity of the cup 2 is prevented.

No direct thermal contact of the heater with parts of the housing and

the execution of the rod from a material with low thermal conductivity allowed to solve the problem of heat protection microswitches.

Switch 12 can have two versions: as an element of the power circuit and as an element of a weakly current control circuit.

The shape and size of the handles is chosen for reasons of user convenience and safety, namely, sufficient distance from hot surfaces.

Along with increasing the usability of the burner, the use of the proposed technical solution will give

opportunity for the consumer (both in everyday life and public catering) to save electricity and increase the safety of heating

electrical appliance.

Claims (4)

1. Electric burner containing body mounted movably along it. A spring-loaded heater with a rod interacting with a heater power supply circuit breaker and a switch trigger threshold regulator are distinguished, and in order to increase the convenience of operation, the housing is made of lower part in the form of a glass with internal thread and an upper thread screwed into it. parts with handles, the lower end of the spring fixed relative to the upper part of the body, and the switch is made interacting with the side surface of the rod. 2. Electric burner according to claim 1. About tl and h and so that it is equipped with dietary washers installed on the ends of the spring. 3. Electric lamp on the PP. 1 and 2, about the fact that inside the rod a through longitudinal bore is made to place the current leads to the heater in it. 4. Electric lamp on PP. 1-4, characterized in that the rod, knobs top housing parts and spacer washers are made of a material with low thermal conductivity. dh f FIG. 2 B