Gas water heater with microcirculation waterway

Abstract

The invention discloses a gas water heater with a microcirculation waterway. The gas water heater comprises a heat exchanger, a constant-temperature cabin, a controller, a water inlet pipe and a water outlet pipe, wherein the controller is arranged in the water heater, the water inlet pipe is connected with the heat exchanger, the water outlet pipe is connected to the constant-temperature cabin, and the constant-temperature cabin is connected downstream the water direction of the heat exchanger. The gas water heater is characterized in that a microcirculation bypass is arranged between the constant-temperature cabin and the water inlet pipe, a check valve and a circulating pump are arranged on the microcirculation bypass, a control switch of the water pump is electrically connected with the controller, a temperature sensor is arranged on the constant-temperature cabin, and the temperature sensor is connected with the controller. According to the gas water heater, the microcirculation bypass is additionally arranged, so that the effective use heat of the constant-temperature cabin is increased, the amount of ignition cooling water is reduced, the neutralizing effect of the constant-temperature cabin is increased, and the bath comfort of a user is increased. In an antifreezing area in winter, a microcirculation function is started, and the internal cycle combustion of the whole machine is realized, so that the antifreezing effect is achieved, and gas is saved.

Description

technical field [0001] The invention belongs to a water heater, in particular to a gas water heater with a micro-circulation waterway. Background technique [0002] The existing gas instant water heater is mainly a water inlet and a water outlet. Cold water flows out from the water inlet through the heat exchanger and from the hot water outlet to complete the heating process. The user needs to experience a lot of cold water every time he uses it, causing the user to wait The hot water takes a long time and wastes water; while some gas water heaters with a constant temperature cabin have unsatisfactory neutralization effect during the user's use, and the warm water section takes a long time. In most cases in winter, the warm water is far below the design temperature value, resulting in users unable In use, the function of the constant temperature cabin is not obvious compared with ordinary models; [0003] Ordinary gas water heaters mainly use electric heating to prevent fre...

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Problems solved by technology

[0002] The existing gas instant water heater is mainly a water inlet and a water outlet. Cold water flows out from the water inlet through the heat exchanger and from the hot water outlet to complete the heating process. The user needs to experience a lot of cold water every time he uses it, causing the user to wait The hot water takes a long time and wastes water; while some gas water heaters with a constant temperature cabin have unsatisfactory neutralization effect during the user's use, and the warm water section takes a long time. In most cases in winter, the warm water is far below the design temperature value, resulting in users unable In use, the function of the constant temperature cabin is not obvious compared with ordinary models;

[0003] Ordinary gas water heaters mainly use electric heating to prevent freezing, which is unsafe and ineffective

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