Constant-temperature system for bathtub

Abstract

The invention relates to a constant-temperature system for a bathtub. The constant-temperature system comprises an electric heating system with a hot water outlet and a connection port. The electric heating system is provided with a three-way valve, a first port of the three-way valve is communicated with the connection port, and a second port of the three-way valve is connected with a circulating water pump which is serially connected with an impurity filter. The constant-temperature system for the bathtub has the advantages that firstly, by adoption of the circulating water pump for realizing cyclic heating and adoption of the impurity filter for filtering impurities, large impurities can be filtered effectively to prevent blockage; secondly, by the aid of a second temperature sensor, whether the temperature of water with waste heat recovered is within an appointed temperature value range or not is detected, and the water with waste heat recovered is timely heated to guarantee constant temperature of washing water; thirdly, due to the fact that the electric heating system adopts a combination structure of a nonmetal water pipe and an electrothermal film, corrosion resistance, incrustation prevention and the like are realized.

Description

technical field [0001] The invention specifically relates to the technical field of water heaters, in particular to a bathtub constant temperature system. Background technique [0002] The existing water heater heats tap water or well water, wherein the water heater adopts a copper pipe or a metal liner or a metal heater. When tap water or well water is used for a long time, scale will form on metal pipes or metal heaters. However, in the water heater industry, water with shower fluid or circulating water will not be used directly for heating, which will cause metal pipes and metal heaters to Quickly scales and corrodes the pipes, ultimately speeding up the failure of the water heater. [0003] In addition, most of the current water heaters have to adjust the water temperature and flow through the external manual mixing valve, but the adjustment of the water temperature and flow through the manual mixing valve is not stable, and it is difficult to adjust to the appropriate ...

AI Technical Summary

Problems solved by technology

When tap water or well water is used for a long time, scale will form on metal pipes or metal heaters. However, in the water heater industry, water with shower fluid or circulating water will not be used directly for heating, which will cause metal pipes and metal heaters to Quickly scales and corrodes pipes, ultimately speeding up water heater failure

[0003]In addition, at present, most water heaters have to adjust the water temperature and flow through external manual mixing valves, but it is not necessary to adjust the water temperature and flow through manual mixing valves. Stable, and it is difficult to adjust to a suitable temperature. When the water temperature of the inner tank continues to drop, the outlet water temperature will also drop. The only way to maintain the water temperature is to continuously adjust the ratio of the mixing water valve. It is very troublesome and inconvenient, and it is difficult to achieve a constant temperature. the goal of

[0004] Furthermore, the current technical means, through the addition of new hot water, leads to a continuous increase in water consumption, which fails to achieve the purpose of saving water

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