Hot water system, constant temperature device and control method of constant temperature device

Abstract

The invention discloses a constant temperature device which comprises a water storage device, a constant temperature assembly, a first detection module, a second detection module, a third detection module and a control module. The water storage device is internally provided with a heater. A first water inlet of the constant temperature assembly is connected with a water outlet of the water storage device; a second water inlet of the constant temperature assembly is externally connected with a water supply pipe; and a water outlet of the constant temperature assembly is used for being externally connected with a water use end. The first detection module is used for detecting the water temperature of the water outlet of the constant temperature assembly. The second detection module is used for detecting the temperature of the first water inlet of the constant temperature assembly. The third detection module is used for detecting the temperature of the second water inlet of the constant temperature assembly. The control module is used for controlling the constant temperature assembly according to the temperature of the water outlet, the temperature of the first water inlet and the temperature of the second water inlet so as to adjust the water inlet proportions of the first water inlet and the second water inlet, and therefore the water temperatures of the water outlets can meet the water use demands at the water use end. The constant temperature device can automatically adjust the water outlet temperature according to the water temperature needed by a user and keep the water outlet temperature constant. The invention further discloses a hot water system and a control method of the constant temperature device.

Description

technical field [0001] The invention relates to the technical field of hot water systems, in particular to a constant temperature device, a hot water system and a control method for the constant temperature device. Background technique [0002] At present, gas water heaters need to discharge a lot of cold water to obtain hot water when they are used alone, and the water temperature tends to fluctuate during use; solar water heaters also need to discharge a lot of cold water, and the temperature of hot water output by solar water heaters is generally very high , when it is output through the water mixing valve, it is difficult to adjust the water temperature to the temperature required by the user due to the large pressure difference between the cold and hot water; The water valve mixes the water, and the manual mixing valve needs to be manually adjusted by the user, which is inconvenient to use. If the domestic automatic mixing valve is used, the outlet water temperature is ...

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Problems solved by technology

[0002] At present, gas water heaters need to discharge a lot of cold water to obtain hot water when they are used alone, and the water temperature tends to fluctuate during use; solar water heaters also need to discharge a lot of cold water, and the hot water output by solar water heaters is generally very high , when output through the mixing valve, it is difficult to adjust the water temperature to the temperature required by the user due to the large pressure difference between the cold and hot water; for air energy water heaters or wall-mounted water heaters, it is generally necessary to manually or automatically The water valve mixes the water, and the manual mixing valve needs to be manually adjusted by the user, which is inconvenient to use. If the domestic automatic mixing valve is used, the outlet water temperature is not constant enough, and it is prone to hot and cold phenomena, and if the foreign mixing valve is used, it will increase the number of users cost

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