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Direct heating type electric water heater

An electric water heater, direct heating technology, applied in the field of fast heating electric water heater or instantaneous electric water heater, can solve the problems of high cost, high assembly precision, easy failure of circuit boards, etc., and achieve low cost, simple and reliable structure Effect

Active Publication Date: 2013-05-01
QINGDAO HEATEC ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of intelligent direct heating electric water heater with time-delayed water-off function can meet the requirements of simple operation, but its cost is high (multiple high-current relays are required), and the microcomputer control circuit board is prone to failure
In addition, there is another type of direct heating electric water heater that uses a purely mechanical design method to enable the electric water heater to realize the function of delaying water shut-off, but its assembly precision is high and the structure is very complicated, so it cannot be widely used.

Method used

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  • Direct heating type electric water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Refer to Figure 5 Shown and referenced figure 2 Shown is a control scheme that uses temperature to delay shut-off water. First connect a normally open temperature control switch in parallel with the mechanical contact switch of the solenoid valve circuit, and then connect it in series to the solenoid valve circuit. The temperature control switch turns on or off the solenoid valve according to the temperature change collected. One of the loops. More specifically: one end of the solenoid valve 2 that controls the water flow circuit is connected to the neutral line N, and the other end has 2 channels, one channel is the first micro switch 11 in the gear knob 1, and the other channel is a normally open Temperature control switch 6. To control the heating circuit, the second micro switch 12 is connected in series to the first electric heating tube 31 to form a first heating circuit and the third micro switch 13 is connected in series to the second electric heating tube 32 ...

Embodiment 2

[0055] Refer to Image 6 Shown and referenced image 3 As shown, it is a control scheme that uses timing to delay water shut-off. First connect a control board in series to the mechanical contact switch of the solenoid valve circuit, and then serially connect it to the solenoid valve circuit. The control board uses the switch signal of the mechanical contact switch of the solenoid valve circuit as the trigger signal. The controller starts the timing according to the trigger signal, and after the timing is completed, the controller turns on or turns off the circuit of the solenoid valve through the relay. More specifically: this embodiment is basically the same as the first embodiment, and the heating circuit and the overall circuit protection are realized in the same structure. The difference is that one end of the solenoid valve 2 that controls the water flow circuit in this embodiment is connected to the neutral line N. The other end is connected to a control board 7, which i...

Embodiment 3

[0057] Refer to Figure 7 Shown and referenced Figure 4 As shown, it is a control scheme that uses a combination of temperature control and timing to delay water shutoff. First connect a control board in series to the mechanical contact switch of the solenoid valve circuit, and then serially connect it to the solenoid valve circuit. The control board uses the switch signal of the mechanical contact switch of the solenoid valve circuit as the trigger signal. And the control board collects temperature changes by a temperature detector, and the controller starts timing according to the trigger signal. After the controller comprehensively judges the timing and / or the collected temperature value, the solenoid valve is turned on or off by a relay. The loop. More specifically: this embodiment is basically the same as the second embodiment. The heating circuit, the water flow circuit and the overall circuit protection have the same structure. The difference is that the control board 7...

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PUM

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Abstract

The invention relates to an electric water heater, in particular to a direct heating type electric water heater, which is also named as fast heating type electric water heater or instant heating type electric water heater. A gear knob is at least arranged on a shell of the direct heating type electric water heater; a water flow pipe, an electric heating element and a fluid electric control valve are at least arranged in the shell; the electric heating element is electrified to heat flow water in the water flow pipe; the fluid electric control valve is used for controlling the flowing / stopping of the water flow in the water flow pipe; and at least two mechanical contact switches are arranged on the gear knob. When the gear knob is rotated to different gears through a knob, the combination of groups of switches is output in the different combination ways that the gear knob is mechanically contacted with the mechanical contact switches, so that heating and flowing / stopping of the water flow are controlled. The mechanical contact switch of a loop of the fluid electric control valve is connected with a time delay control unit to perform time relay disconnection of the loop of the fluid electric control valve, so that flow water delay disconnection of the water heater is controlled. Water can be intelligently cut off in a delay way by the direct heating type electric water heater, and the direct heating type electric water heater is simple and reliable in structure.

Description

Technical field [0001] The present invention relates to electric water heaters, in particular to direct heating electric water heaters, also known as quick heating electric water heaters or instant electric water heaters. Background technique [0002] Direct heating electric water heaters, also known as quick-heating electric water heaters or instant electric water heaters, are electric water heaters different from storage electric water heaters with water storage tanks. It uses high-power current to quickly heat the hot water in the pipeline to produce hot water by the electric heating element of the electric heating tube or electromagnetic coil. Therefore, it has the advantage of saving time and space compared with traditional storage electric water heaters. [0003] It is precisely because of the rapid heating characteristics of this direct heating electric water heater that it has a shortcoming: when the hot water is temporarily turned off when soap or shower gel is applied dur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H9/20
CPCF24H9/2028F24H1/101
Inventor 侯全舵曾艳洪壹辉
Owner QINGDAO HEATEC ELECTRIC