Fuel gas hot water device and anti-freezing valve

Abstract

The utility model discloses a fuel gas hot water device and an anti-freezing valve. The fuel gas hot water device comprises a heat exchanger, a water inlet pipe, a water outlet pipe and an anti-freezing mechanism, wherein the water inlet pipe and the water outlet pipe are connected with the heat exchanger; the anti-freezing mechanism is arranged on the water inlet pipe; the anti-freezing mechanismhas a normal state allowing water in the water inlet pipe to flow through and a turn-off state blocking the water inlet pipe from conveying water to the heat exchanger; and the anti-freezing mechanism is driven by internal pressure to be switched from the normal state to the turn-off state when an environment temperature is lower than a first preset temperature. By using the fuel gas hot water device and the anti-freezing valve, the heat exchanger can be prevented from being frozen and damaged under a condition that a water heater is powered off, and meanwhile a situation that a user home issoaked is avoided.

Description

technical field [0001] The present application relates to the field of water heaters, in particular to a gas water heater and an antifreeze valve. Background technique [0002] In order to avoid the gas water heater from being damaged by freezing, the existing gas water heater usually has an antifreeze function. The existing anti-freezing function usually adopts electric heating anti-freezing and ignition anti-freezing to prevent the water in the water heater from freezing and expanding. And no matter be electric heating antifreeze or ignition antifreeze all need electric power supply. [0003] However, due to the electricity consumption habits of different users, some users will turn off the power supply of the water heater or pull out the power plug from the power supply panel when the gas water heater is used up or the gas water heater is not used for a long time, or the gas water heater is turned off. The natural gas valve is closed, which makes the existing antifreeze...

AI Technical Summary

Problems solved by technology

[0003] However, due to the electricity consumption habits of different users, some users will turn off the power supply of the water heater or pull out the power plug from the power supply panel when the gas water heater is used up or the gas water heater is not used for a long time, or the gas water heater is turned off. The natural gas valve is closed, which makes the existing antifreeze function of the water heater unable to work, so when the ambient temperature drops below zero, the water in the heat exchanger will freeze, and the volume will expand during the freezing process. The heat exchanger will be damaged when the

[0004] Moreover, because the gas water heater is always connected with the tap water inlet pipeline, if the water heater is frozen when the user is not at home, the tap water will continue to flow out, causing greater losses to the user.

Especially in the Yangtze River Basin where there is no heating supply, a large number of water heaters are often damaged by freezing when the weather is below zero, causing great losses and greatly affecting the user experience

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