Constant-temperature gas-fired water heater with remote temperature adjustment and cold water temperature compensation control functions

Abstract

The invention discloses a constant-temperature gas-fired water heater with remote temperature adjustment and cold water temperature compensation control functions. The constant-temperature gas-fired water heater comprises a cold water inlet and two hot water outlets. The outlet hot water temperature of the constant-temperature gas-fired water heater is adjusted remotely through a method that the flow relative values of two paths of hot water are controlled through a water valve. When the outlet hot water flow of the first hot water outlet is increased relatively and the outlet hot water flow of the second hot water outlet is reduced relatively, the outlet hot water temperature is increased. Otherwise, the outlet hot water temperature is lowered. The temperature control method of the constant-temperature gas-fired water heater adopts an algorithm combining proportion integration differentiation (PID) and inlet cold water temperature feedforward compensation, interference of inlet cold water temperature changes with the outlet hot water temperature of the constant-temperature gas-fired water heater is reduced, and the control accuracy is improved. A wired or wireless remote control is not needed, remote adjustment on the hot water temperature of the constant-temperature gas-fired water heater can be achieved, and the control result is stable and reliable.

Description

Technical field [0001] The invention relates to a constant temperature gas water heater control technology, in particular to a constant temperature gas water heater with remote temperature adjustment and cold water temperature compensation control. Background technique [0002] If the temperature setting of the thermostatic gas water heater is not appropriate, it will cause great inconvenience, especially in the shower, the temperature of the thermostatic gas water heater without wireless remote control or remote control cannot be adjusted, and it is easy to cause it to add cold water with the mixing valve The thermostatic gas water heater turns off. Using wireless remote control to adjust the temperature of the thermostatic gas water heater, due to the limitation of the installation location, the remote control signal cannot be transmitted to the thermostatic gas water heater in many cases. When using the remote wire control method, the dedicated waterproof wired remote control...

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Problems solved by technology

[0002] If the temperature setting of the constant temperature gas water heater is inappropriate, it will bring great inconvenience to people, especially when showering, the temperature of the constant temperature gas water heater without wireless remote control or remote wire control cannot be adjusted, and adding cold water with the mixing valve will easily lead to Constant temperature gas water heater flameout

Use wireless remote control to adjust the temperature of the constant temperature gas water heater. Due to the limitation of the installation location, the remote control signal cannot be transmitted to the constant temperature gas water heater in many occasions.

When the long-distance wire control method is adopted, the cost of the dedicated waterproof wired remote control is high, and it needs to be buried in advance, and it has been working in a humid environment such as a bathroom for a long time, and the failure rate of the electronic wired remote control is high.

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