Fuel-gas fast anti-freezing water heater with automatic draining function

Abstract

A fuel-gas fast anti-freezing water heater with an automatic draining function comprises a shell, a water inlet pipe and a hot water outlet pipe, and also comprises a normally opened water supplying valve, a normally closed draining valve, a temperature sensor and a controlling device; the water outlet end of the water supplying valve is connected with the water inlet end of the water inlet pipe; the water inlet end of the water supplying valve is communicated with a water source; the draining valve is communicated with the water outlet end of the water supplying end; the draining end of the draining valve is provided with a draining interface; the temperature sensor is arranged in the shell; the water supplying valve, the draining valve and the temperature sensor are connected with the controlling device. As such a structure is adopted, during use, a water source switch is opened, water of the normally opened water inlet valve enters a steam connecting valve and then enters a heat releasing and exchanging device; when the external temperature is lower and achieves the freezing point, the temperature sensor sends a signal to the controlling device, the normally opened water inlet valve is closed, the normally closed draining valve is opened, rest water in a heat exchanger is drained by the water inlet pipe and the normally closed draining valve; the fuel-gas fast anti-freezing water heater with the automatic draining function can achieve the aim of anti-freezing.

Description

technical field [0001] The invention relates to a gas water heater, in particular to an anti-icing drainage device for a gas water heater. Background technique [0002] Current prior art, manual antifreeze: after the water heater stops using, the user manually closes the water heater inlet valve, opens the water heater outlet valve, and then unscrews the water heater valve body or the water discharge safety valve on the water inlet joint to drain the accumulated water in the water heater. The method itself is reliable, but it is easy for consumers to forget, causing the water heater to freeze and crack. [0003] Electric heating antifreeze: the water heater is stopped. When the temperature of the water tank of the water heater drops to close to 0°C, the temperature switch installed on the water pipe of the water heater is closed, and the water pipe of the water heater is heated by the ceramic heating block installed on the water pipe of the water heater to avoid liquid in th...

AI Technical Summary

Problems solved by technology

In individual designs, only one automatic water discharge valve is set for automatic antifreeze. In actual use, most users install water heaters on balconies to facilitate ventilation. , In this case, this so-called automatic antifreeze requires the user to close the water inlet valve first, and then open the water outlet valve, so that the water heater can be antifreeze. Otherwise, if the water inlet valve is not closed, the tap water will flow out directly from the drain. It causes waste, and at the same time, it cannot achieve the antifreeze effect of the water heater

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