The invention discloses a gas water heater which comprises a fan, a gas inlet pipe and an intake valve connected to the gas inlet pipe in series. The gas water heater further comprises a jacket heat exchanger, a catalytic combustor, a bottom shell, a preheating combustor, a heat collection barrel, a main heat exchanger and a controller. An upper combustion chamber is defined by the jacket heat exchanger, the catalytic combustor is installed on the upper combustion chamber, a lower combustion chamber is formed on the lower portion of the bottom shell, the bottom shell is provided with a smoke exhaust port, the bottom shell and the jacket heat exchanger are in butt connection to form a heat exchange chamber, the preheating combustor is installed in the lower combustion chamber, the heat collection barrel is installed in the heat exchange chamber, one end of the heat collection barrel is connected to the upper combustion chamber, the other end of the heat collection barrel is connected tothe lower combustion chamber, the main heat exchanger is installed in the heat exchange chamber and arranged on the periphery of the heat collection barrel in a sleeving mode, and the controller is used for controlling the preheating combustor to carry out combustion so as to heat the catalytic combustor when the gas water heater is started, and controlling the preheating combustor to be turned off when the temperature of the catalytic combustor reaches the initiation temperature or above. By means of the gas water heater, the energy utilization rate can be sufficiently improved, and emissionof hazardous substance can be sufficiently reduced.

Gas water heater

The invention discloses a gas water heater, and a safety control system and method therefor. The safety control system comprises an exhaust blower, a rotational speed detecting unit, a power obtaining unit, a rotational speed difference obtaining unit and an exhaust control unit. The rotational speed detection unit is used for detecting the rotational speed of the exhaust blower. The power obtaining unit is used for obtaining the output power set value of the exhaust blower. The rotational speed difference obtaining unit is used for obtaining the rotational speed actual value and the rotational speed reference value of the exhaust blower according to the output power set value, and calculating the difference between the rotational speed actual value and the rotational speed reference value. The exhaust control unit is respectively connected with the exhaust blower, the rotational speed detecting unit, the rotational speed difference obtaining unit and the power obtaining unit, and is used for correcting the rotational speed of the exhaust blower according to the difference and judging the air pressure condition of an air outlet of the exhaust blower according to the corrected rotational speed of the exhaust blower and the output power set value so as to adjust the output power set value of the exhaust blower according to the air pressure condition of the air outlet of the exhaust blower. The system can ensure that the gas water heater has a good combustion condition, and ensures safe and reliable operation of the gas water heater, and the control precision is improved.

Gas water heater, and safety control system and method therefor

The invention discloses a constant-temperature gas water heater. The constant-temperature gas water heater comprises a single-chip microcomputer, an electromagnetic valve, a gas proportional valve, a cold water inlet temperature sensor, a hot water outlet temperature sensor, an operation panel and a gas distribution rod. According to a first working mode, the control panel is operated to select a low-temperature section; the single-chip microcomputer outputs a first current signal to control the opening degree of the gas proportional valve; the temperature in the temperature range of the low-temperature section is selected; and the selected hot water outlet temperature is kept constant. According to a second working mode, when the control panel is operated to select a high-temperature section, the single-chip microcomputer outputs a second current signal to control the opening degree of the gas proportional valve, the temperature in the range of the high-temperature section is selected, and the selected hot water outlet temperature is kept constant. Defects in the prior art are overcome, and the service life is prolonged.

Constant-temperature gas water heater

The invention belongs to the field of water heaters, and discloses an intelligent preheating circulation gas water heater, a preheating circulation system and a control method. A water storage tank and a water pump are arranged on a water inlet pipeline; a three-way valve is arranged on a water outlet pipeline; a heat exchanger is arranged between the water inlet pipeline and the water outlet pipeline; the three-way valve communicates with the water storage tank through a bypass line; when a preheating circulation function is started, the conducting of the three-way valve and the bypass line is controlled; an inner circulation pipeline system is formed among the water inlet pipeline, the water pump, the heat exchanger, the water outlet pipeline, the three-way valve, the bypass line and thewater storage tank; and when the water outlet temperature T2 of the water storage tank is smaller than the preset circulation temperature Tx, the water pump circulates water in the inner circulationpipeline system, and water is heated to the temperature which is not less than the circulation temperature Tx. When a user uses hot water, water in the water storage tank is heated to the temperaturewhich is not less than the circulation temperature Tx and firstly flows out; and after hot water in the water storage tank flows out, entered cold water can be stably heated through the gas water heater so as to reach to the preset temperature required by the user.

Intelligent preheating circulation gas water heater, preheating circulation system and control method

A water valve and a water dispenser having the same. The water valve comprises an upper support (1), a lower support (2), a valve element (3), a seal part (4), a spring (5) and a water outlet pipe (6). A water inlet (101) is formed in the upper support (1). A water outlet (201) and an air hole (202) are formed in the lower support (2). One end of the valve element (3) is connected to the upper support (1), and the other end of the valve element (3) is fixedly connected to the lower support (2). The valve element (3) can move relative to the upper support (1) so as to control connection and disconnection between the water inlet (101) and the water outlet (201). When the water valve is in a discharge state, the inside of the water outlet pipe (6) is not communicated with the atmosphere; when the water valve is in a non-discharge state, the inside of the water outlet pipe (6) is communicated with the atmosphere through the air hole (202).

Water valve and water dispenser

The invention provides a constant-temperature gas heater control method and a constant-temperature gas heater. The constant-temperature gas heater comprises a main control panel, a heat exchanger, a combuster, a water inlet pipe and a water outlet pipe, and further comprises a bypass pipe. The bypass pipe is connected with the water inlet pipe and the water outlet pipe, and is provided with a bypass water server. An outlet of the heat exchanger is provided with a first temperature sensor. An outlet of the water outlet pipe is provided with a second temperature sensor. The first temperature sensor, the second temperature sensor and the bypass water server are respectively in electric connection with the main control panel. The bypass pipe is arranged between the water inlet pipe and the water outlet pipe, the bypass pipe is provided with the bypass water server, and the main control panel controls the bypass water server to operate to adjust water flow of the bypass pipe according to temperature information collected by the first temperature sensor and the second temperature sensor, so the water outflowing temperature of the water outlet pipe is constant, the situation that hot water at exceedingly high temperature is output is avoided, the water outflowing temperature of the constant-temperature gas heater is constant, and comfort and safety of the constant-temperature gas heater are improved.

Constant-temperature gas heater control method and constant-temperature gas heater

The utility model provides an internal pressure feedback regulation system of a gas water heater, which comprises a discharged-gas wind pressure detection unit, a fan rotation speed detection unit, a control unit and a fan rotation speed control unit. The discharged-gas wind pressure detection unit is used for detecting wind pressure of waste gas discharged at a gas discharging port of the gas water heater. The fan rotation speed detection unit is used for detecting fan rotation speed of the gas water heater. The control unit is connected to the discharged-gas wind pressure detection unit and the fan rotation speed detection unit, stores functional curves of air flue status where different fan rotation speed corresponds to different waste gas wind pressure, and the current air flue status corresponds to waste gas wind pressure and fan rotation speed, and the waste gas wind pressure and the fan rotation speed are determined by the discharged-gas wind pressure detection unit and the fan rotation speed detection unit, based on the functional curves and generating corresponding fan rotation speed control signals of the gas water heater. The fan rotation speed control unit is connected to the control unit and used for controlling fan rotation speed according to fan rotation speed control signals of the control unit. Based on detected wind pressure changes of discharged-gas air flue, the internal pressure feedback regulation system of the gas water heater judges whether the air flue is blocked, controls fan rotation speed and improves use safety for users.

Internal pressure feedback regulation system of gas water heater

The invention discloses a control method and system of a gas water heater and the gas water heater. The control method comprises the following steps that in the working process of the gas water heater, the current opening degree of a gas proportional valve of the water heater is monitored, and current practical combustion heat quantity is worked out; whether the current opening degree of the gas proportional valve and the current practical combustion heat quantity accord with a preset standard function relation is judged; when the current opening degree of the gas proportional valve and the current practical combustion heat quantity do not accord with the preset standard function relation, it is determined that gas pressure is insufficient, and a low pressure control process is executed according to the current low pressure maximum thermal load; when the current opening degree of the gas proportional valve and the current practical combustion heat quantity accord with the preset standard function relation, a normal control process is executed. By applying the method and system to the gas water heater, the problems that because the gas pressure is insufficient, flameout and fire spreading are caused and the temperature of discharged water cannot reach a set temperature can be solved.

Control method and system of gas water heater and gas water heater

The invention discloses a gas water heater which comprises a shell and a water feeding pipeline partially arranged in the shell, and further comprises a pressurizing pump arranged on the water feeding pipeline and a controller located on the shell, wherein the controller controls opening and closing of the pressurizing pump and adjusts output pressure of the pressurizing pump. The invention further discloses a control method of the gas water heater. The control method comprises the following steps: acquiring a water feeding flow value; comparing the acquired water feeding flow value with a preset flow value; when the water feeding flow value is less than the preset flow value, starting and controlling the pressurizing pump to gradually increase the output pressure till the water feeding flow value is equal to the preset flow value; and retaining the output pressure of the pressurizing pump. According to the gas water heater, when the water heater cannot be started as water flow is too low or the water flow is too low to meet the water amount required by a user, the controller controls the pressurizing pump to be opened and closed and adjusts the output pressure of the pressurizing pump, thus realizing automatic control over the pressurizing pump.

Gas water heater and control method

The utility model provides a constant-temperature gas water heater which comprises a main control plate, a heat exchanger, a combustor, a water inlet pipe and a water outlet pipe, and further comprises a bypass pipe, wherein the bypass pipe is connected with the water inlet pipe and the water outlet pipe, a first flow control device is arranged on the bypass pipe, a first temperature sensor is arranged at an outlet of the heat exchanger, a second temperature sensor is arranged at an outlet of the water outlet pipe, and the first temperature sensor, the second temperature sensor and the first flow control device are respectively electrically connected with the main control plate The bypass pipe is arranged between the water inlet pipe and the water outlet pipe, the first flow control device is arranged on the bypass pipe, the main control plate controls the first flow control device to act for regulating the water flow of the bypass pipe according to temperature information acquired by the first temperature sensor and the second temperature sensor, so that the outlet water temperature of the water outlet pipe is constant, hot water with the overhigh temperature is prevented from being output, the constant outlet water temperature of the constant-temperature gas water heater is realized, and the comfort and the safety of the constant-temperature gas water heater are improved

Zhang Xin

Papers

Constant-temperature gas heater control method and constant-temperature gas heater

Internal pressure feedback regulation system of gas water heater

Control method and system of gas water heater and gas water heater

Gas water heater and control method

Constant-temperature gas water heater