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Liquid heating device, electric vacuum flask and dry burning preventing control method thereof

The technology of a heating device and a control method is applied in the field of liquid heating device and anti-dry burning control, which can solve the problems of troublesome operation, inability to extract and drain water, and inability to automatically discharge water, and achieve the effect of preventing dry burning and preventing the phenomenon of dry burning.

Active Publication Date: 2017-09-15
GUANGDONG MIDEA CONSUMER ELECTRICS MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Some liquid heaters without electric water pumps in the prior art cannot automatically discharge water, and the entire container must be lifted every time the water is poured
Therefore, there have been some liquid heaters with electric water pumps. In order to prevent the liquid heater from drying out (for example, electric thermoses, electric thermoses work for a long time, and dry heating is easy to occur), the inner tank is drained in the prior art. The mouth is set higher than the bottom surface of the inner tank. Although this can prevent dry burning, there will always be a part of the water in the inner tank that cannot be drained out and become residual water. The user needs to pick up the whole machine and pour it out. trouble

Method used

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  • Liquid heating device, electric vacuum flask and dry burning preventing control method thereof
  • Liquid heating device, electric vacuum flask and dry burning preventing control method thereof
  • Liquid heating device, electric vacuum flask and dry burning preventing control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1, such as figure 1 , 2 As shown, a liquid heating device includes an inner tank 1, a heating element 2, an electric water pump 3, a temperature sensor 4 and a control unit 5. The bottom of the inner tank 1 is a bottom surface 11 of the inner tank, and the bottom disc The surface 11 is provided with the lowest surface 12 of the inner container bottom plate whose height is lower than the surface 11 of the inner container bottom plate, the lowest surface 12 of the inner container bottom plate is excessively connected with the curved surface 11 of the inner container bottom plate surface, and the inner container The lowest surface 12 of the bottom plate is provided with an inner tank drain port 13, the inner tank drain port 13 is lower than the inner tank bottom surface, the inner tank drain port 13 is connected to the electric water pump 3 through a drain pipe, and the electric water pump 3 is drained The pipe is connected to the outlet 6 of the liquid heating de...

Embodiment 2

[0044] Embodiment 2, on the basis of Embodiment 1, the control unit is used to preferentially detect whether the electric water pump is started, if it is started, control the heating element to stop working, and if the electric water pump stops working, control the heating body Return to the state before the start of the electric water pump. Prioritize checking whether the electric water pump is working. If the electric water pump is working, control the heating element not to work. This effectively solves the problem that when the electric water pump is pumping water, the heating element heats up at the same time and generates air bubbles to block the electric water pump, resulting in poor water discharge or low water volume in the inner tank when pumping water. Dry burning occurs when the water level reaches a low level.

Embodiment 3

[0045] Embodiment 3. On the basis of Embodiment 2, the liquid heating device further includes a control panel, and the control panel includes a child lock key or a safety lock key. When the control unit detects that the electric water pump is started, it first detects the child lock key or safety lock key. The state of the lock key, when it is in the unlocked state, controls the heating element to stop working, controls the electric water pump to start, and the liquid heating device discharges water; when the child lock key or safety lock key is locked, the water output function is locked, the electric water pump stops working, and the heating element is controlled Return to the state before the start of the electric water pump. The control panel is equipped with a child lock key or a safety lock key, which can effectively ensure the safety of the product. Before using the electric water pump to pump water, you need to press the child lock key or safety lock key to unlock it. T...

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Abstract

The invention relates to a dry burning preventing control method of a liquid heating device. The method comprises the following steps: detecting temperature of liquid in a liner in real time by virtue of a temperature sensor; then, transmitting the detected temperature of the liquid in the liner to a control unit; calculating a change rate of the temperature of the liquid in the liner by virtue of the control unit in accordance with the temperature, which is detected by the temperature sensor, of the liquid in the liner; acquiring a working condition of a heating body by virtue of the control unit, and calling a corresponding preset temperature change rate under a corresponding state in accordance with the acquired working condition; and controlling the heating body to stop working when the change rate, which is calculated by the control unit, of the temperature of the liquid in the liner is greater than or equal to the preset temperature change rate. With the application of the dry burning preventing control method provided by the invention, a dry burning phenomenon of the liquid heating device under various states can be effectively prevented. The invention also provides the liquid heating device and an electric vacuum flask.

Description

technical field [0001] The invention relates to the technical field of liquid heating, in particular to a liquid heating device, an electric thermos, a liquid heating device, and a dry-burn prevention control method for the electric thermos. Background technique [0002] In the prior art, some liquid heaters without electric water pumps cannot discharge water automatically, and the whole container must be picked up every time to pour water. Therefore, there have been some liquid heaters with electric water pumps. In order to prevent the liquid heater from drying out (for example, electric thermoses, electric thermoses work for a long time, and dry heating is easy to occur), the inner tank is drained in the prior art. The mouth is set higher than the bottom surface of the inner tank. Although this can prevent dry burning, there will always be a part of the water in the inner tank that cannot be drained out and become residual water. The user needs to pick up the whole machine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47J27/21A47J36/00
CPCA47J27/21083A47J27/21158A47J36/00
Inventor 陈炜杰朱国军
Owner GUANGDONG MIDEA CONSUMER ELECTRICS MFG CO LTD
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