Bypass flow valve and gas water heater comprising same

Abstract

The invention discloses a bypass flow valve and a gas water heater comprising the bypass flow valve. The bypass flow valve comprises a shell, a valve seat, a memory alloy spring, a first magnet, a second magnet, a valve core and a flexible sealing piece, wherein the valve seat, the memory alloy spring, the first magnet, the second magnet, the valve core and the flexible sealing piece are arrangedin the shell, and the first magnet and the second magnet are attracted by each other. The valve seat is fixed relative to the shell and is a hollow cylindrical member. The first end of the valve coreis connected with a cold water inlet through the flexible sealing piece. The second end of the valve core faces the valve seat. The memory alloy spring presses the valve core so that the valve core moves in the direction away from the valve seat. The first magnet is fixed to the valve core, and the second magnet is fixed to the valve seat. The bypass flow valve adopts the memory alloy spring. Through mutual cooperation of the memory alloy spring and the magnets, the water inlet amount of cold water can be adjusted according to the temperature of flowing hot water, so that the temperature of flowing mixed water is regulated, and the temperature of the flowing mixed water is prevented from being too high or too low. The gas water heater can adjust the water outlet temperature and prevent thewater outlet temperature from rising or dropping suddenly.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a bypass flow valve and a gas water heater comprising the same. Background technique [0002] The outlet water temperature of the existing gas water heater is adjusted by adjusting the heating range. If the user needs to adjust the outlet water temperature again, it can only be adjusted through the water mixing valve of the faucet. However, the adjustment of the heating range of the gas water heater has a hysteresis. When the hot water supply is lowered, the internal heating range of the gas water heater will be reduced correspondingly, that is, the firepower will be reduced to avoid the rise of the water temperature, but the heat exchanger cannot cool down quickly, so the outlet water temperature of the gas water heater will still rise rapidly in a short period of time. High, it is easy to burn the user. Similarly, when the user increases the hot water supply, the interna...

AI Technical Summary

Problems solved by technology

[0002] The outlet water temperature of the existing gas water heater is adjusted by adjusting the heating range. If the user needs to adjust the outlet water temperature again, it can only be adjusted through the water mixing valve of the faucet. However, the adjustment of the heating range of the gas water heater has a hysteresis. When the hot water supply is lowered, the internal heating range of the gas water heater will be reduced correspondingly, that is, the firepower will be reduced to avoid the rise of the water temperature, but the heat exchanger cannot cool down quickly, so the outlet water temperature of the gas water heater will still rise rapidly in a short period of time. High, it is easy to burn the user. Similarly, when the user increases the hot water supply, the internal heating range of the gas water heater will be increased accordingly, that is, the firepower will be increased to avoid the water temperature from dropping, but the heat exchanger cannot heat up quickly, so it will still cause The outlet water temperature of the gas water heater drops rapidly in a short period of time, which is easy to freeze the user

[0003] When the user adjusts the water output of the existing gas water heater, the water temperature will be hot and cold, resulting in extremely poor user experience

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