CN110686410A - Intelligent water mixing system for gas water heater and control method thereof - Google Patents

Abstract

The invention discloses an intelligent water mixing system of a gas water heater and a control method thereof, which comprises a shell, a burner, a heat exchange pipe, a water inlet pipe, a water outlet pipe, an electric three-way valve, a water flow sensor, a water inlet temperature sensor, a water outlet temperature sensor and a control center, wherein the electric three-way valve is arranged at the end part of the water inlet pipe, then the water is divided out of the first shunt pipe to the heat exchanger and is divided out of the second shunt pipe to the water outlet pipe, when the water outlet temperature sensor detects that the water outlet temperature changes, the control center can adjust the proportion of the electric three-way valve to change the water temperature to reach the preset temperature, thereby being capable of intelligently and dynamically adjusting the water temperature without manual operation, being very rapid in water temperature adjustment, being free from sudden cold and sudden heat caused by sudden large and small water flow, even if the water flow changes rapidly, the water temperature can be adjusted to be balanced by rapidly adjusting the opening size of the electric three-way valve.

Description

Intelligent water mixing system for gas water heater and control method thereof

technical field

The invention relates to the field of gas water heaters, in particular to an intelligent water mixing system for gas water heaters and a control method thereof.

Background technique

With the increasing improvement of people's lives, people have more refined requirements for the experience of using gas water heaters. Although the gas water heaters on the market are thermostatic, in actual use, the water temperature is still hot and cold. Stop and restart, the water temperature is too high (that is, the water in the water heater is heated by the residual temperature after the water is stopped). For this reason, most manufacturers add a water mixing device mixing valve to the water port to adjust the water temperature, which requires the user to manually adjust it, which is not intelligent, and the user experience is not comfortable. For this reason, some manufacturers use the burner power A water heater with linkage feedback with the outlet water temperature, but in this way, since it takes time to heat the water, the temperature of the water changes slowly, and the use experience is still not good, especially when the water flow changes rapidly, the water temperature balance cannot be controlled at all.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the purpose of the present invention is to provide an intelligent water mixing system for a gas water heater and a control method thereof.

The technical solution adopted by the present invention to solve the problem is: an intelligent water mixing system for a gas water heater, comprising:

case;

a burner, the burner is arranged in a casing, and the casing is provided with an air intake joint that communicates with the burner;

a heat exchanger, the heat exchanger is arranged on the burner;

a water inlet pipe, the water inlet pipe is arranged on the shell;

a water outlet pipe, the water outlet pipe is communicated with the outlet end of the heat exchanger, and the end of the water outlet pipe is arranged on the shell;

Electric three-way valve, the a port of the electric three-way valve is set at the end of the water inlet pipe, the b port of the electric three-way valve is connected with a first shunt pipe, and the first shunt pipe is communicated with the inlet end of the heat exchanger, so The c port of the electric three-way valve is connected with a second shunt pipe, and the second shunt pipe is communicated with the water outlet pipe;

a water flow sensor, the water flow sensor is arranged in the water inlet pipe;

an inlet water temperature sensor, which is arranged in the first shunt pipe or in the water inlet pipe;

an outlet water temperature sensor, the outlet water temperature sensor is arranged in the outlet pipe;

The control center is electrically connected with the burner, the electric three-way valve, the water flow sensor, the inlet water temperature sensor and the outlet water temperature sensor.

As a further improvement of the above technical solution, the inlet water temperature sensor is arranged in the first shunt pipe.

As a further improvement of the above technical solution, the outlet water temperature sensor is arranged at the end of the outlet pipe.

As a further improvement of the above technical solution, a safety valve is provided at the end of the water outlet pipe.

A control method for an intelligent water mixing system of a gas water heater, comprising:

S1. Start the water heater, and the water heater enters the standby state;

S2. The user sets the preset water temperature;

S3. When it is detected that the user needs to use it, the water flow detector, the inlet water temperature detector and the outlet water temperature detector detect the flow frequency of the inflow water and the temperature of the inlet and outlet water and feed it back to the control center;

S4. The control center calculates whether the preset water temperature requirement can be met within the load range of the burner according to the water flow rate and the preset temperature. If it can be satisfied, it will go to S5, and if it cannot be satisfied, it will go to S8;

S5. Adjust the electric three-way valve to the preset state, so that part of the water flow flows into the heat exchanger for heating, and part of the water flow flows into the water outlet pipe along the second shunt pipe, while adjusting the burner load to meet the preset water temperature requirement, and enter S6;

S6. The outlet water temperature sensor detects the outlet water temperature and feeds it back to the control center, and the control center compares the real-time water temperature with the preset temperature, and if the water temperature changes relative to the preset temperature, enter S7;

S7. The water flow detector feeds back the water flow to the control center, and the control center adjusts the diversion ratio of the electric three-way valve and the burner load according to the data and enters the water temperature adjustment step;

S8. Judging whether the maximum load of the burner cannot meet the demand or the minimum load cannot meet the demand, if the maximum load cannot meet the demand, go to S9, if the minimum load cannot meet the demand, go to S10;

S9. Adjust the burner load to the maximum, and the electric three-way valve does not work so that the water flow all flows into the heat exchanger;

S10. Adjust the burner load to the minimum, start the electric three-way valve to adjust the water temperature to the preset water temperature by adjusting the hot and cold water, and control the water temperature by adjusting the electric three-way valve when the outlet water temperature changes. If the electric three-way valve is opened If the preset temperature cannot be reached to the maximum, the burner load is adjusted to the minimum, and the electric three-way valve is opened to the maximum.

As a further improvement of the above technical solution, the water temperature adjustment step is:

S7.1. The control center compares whether the outlet water temperature is decreased or increased, if it is increased, it will go to S7.2, and if it is decreased, it will go to S7.3;

S7.2. Control the central drive to open the electric three-way valve to reduce the water flow into the heat exchanger and increase the water flow into the outlet pipe to quickly make the water temperature reach the preset temperature;

S7.3. The control center drives the electric three-way valve to open small, so that the water flow into the heat exchanger increases, and the water flow into the water outlet pipe decreases, so that the water temperature can quickly reach the preset temperature.

As a further improvement of the above technical solution, it also includes step S7.4: after the step S7.2 is completed, the control center controls the burner load to reduce, and drives the electric three-way valve to gradually reduce to a preset state. If the burner When the load is adjusted to the minimum, and the current state of the electric three-way valve still cannot be reduced to the preset state, then enter S10.

As a further improvement of the above technical solution, it also includes step S7.5: after the step S7.3 is completed, the control center controls the burner load to increase, and drives the electric three-way valve to gradually open to a preset state. If the burner When the load is adjusted to the maximum, the current state of the electric three-way valve still cannot be opened to the preset state, the burner load remains at the maximum, and the electric three-way valve remains in the current state.

As a further improvement of the above technical solution, the preset state of the electric three-way valve is a half-open state.

The beneficial effect of the present invention is that: an electric three-way valve is arranged at the end of the water inlet pipe, and then the first branch pipe is branched to the heat exchanger, and the second branch pipe is branched to the water outlet pipe. When the water temperature sensor detects the After the water outlet temperature changes, the control center can adjust the proportion of the electric three-way valve to change the water temperature to reach the preset temperature, so that the water temperature can be adjusted intelligently and dynamically, without manual control, and the water temperature adjustment is very fast, and it will not be caused by sudden large water flow. Even if the water flow changes rapidly, the water temperature balance can be adjusted by quickly adjusting the opening size of the electric three-way valve.

Description of drawings

The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

1 is a schematic structural diagram of a preferred embodiment of an intelligent water mixing system for a gas water heater in the present invention;

FIG. 2 is a schematic flow chart of the steps of the control method of the intelligent water mixing system of the gas water heater according to the present invention.

Detailed ways

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Each technical feature and overall technical solution of the invention should not be construed as limiting the protection scope of the invention.

In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

1 to 2, an intelligent water mixing system for a gas water heater includes:

housing 10;

a burner 20, the burner 20 is arranged in the casing 10, and the casing 10 is provided with an intake joint communicating with the burner 20;

a heat exchanger 30, the heat exchanger 30 is arranged on the burner 20;

a water inlet pipe 40, the water inlet pipe 40 is arranged on the casing 10;

a water outlet pipe 80, the water outlet pipe 80 communicates with the outlet end of the heat exchanger 30, and the end of the water outlet pipe 80 is arranged on the casing 10;

The electric three-way valve 50, the port a of the electric three-way valve 50 is arranged at the end of the water inlet pipe 40, the b port of the electric three-way valve 50 is connected with the first branch pipe 60, the first branch pipe 60 and the heat exchanger 30 The inlet end is connected, the c port of the electric three-way valve 50 is connected with a second shunt pipe 70, and the second shunt pipe 70 is communicated with the water outlet pipe 80;

a water flow sensor, the water flow sensor is arranged in the water inlet pipe 40;

an inlet water temperature sensor 92, the inlet water temperature sensor 92 is arranged in the first shunt pipe 60 or in the water inlet pipe 40;

an outlet water temperature sensor 91, the outlet water temperature sensor 91 is arranged in the outlet pipe 80;

The control center 90 is electrically connected with the burner 20, the electric three-way valve 50, the water flow sensor, the water inlet temperature sensor 92 and the water outlet temperature sensor 91, and the control center 90 can control the electric three-way valve 50 to work to The second branch pipe 70 is opened to adjust the ratio of water flow into the first branch pipe 60 and the second branch pipe 70 .

During use, the electric three-way valve 50 is provided at the end of the water inlet pipe 40, and then the first branch pipe 60 is branched to the heat exchanger 30, and the second branch pipe 70 is branched to the water outlet pipe 80. Under normal circumstances , the electric three-way valve 50 is located at a preset position. When the outlet water temperature sensor 91 detects that the outlet water temperature changes, the control center 90 can first adjust the ratio of the electric three-way valve 50 to change the water temperature to achieve the preset temperature. After the center 90, the load of the burner 20 is slowly adjusted, and the electric three-way valve 50 is adjusted to dynamically balance the water temperature, so that the electric three-way valve 50 is restored to the preset position to deal with the next water temperature change. Through this solution, intelligent dynamic It does not require human control to adjust the water temperature, and the water temperature adjustment is very fast compared with the existing technology. The opening size of the through valve 50 can adjust the water temperature balance.

For further improvement, preferably, the inlet water temperature sensor 92 is arranged in the first branch pipe 60 .

For further improvement, in order to make the detection of the outlet water temperature more accurate, it is preferable that the outlet water temperature is preferably set at the end of the outlet pipe 80, so as to give the hot water in the outlet pipe 80 and the cold water flowing in the second branch pipe 70 a longer mixing time. water length.

For further improvement, in order to ensure safety, it is preferable that the end of the water outlet pipe 80 is further provided with a safety valve.

The present invention also discloses a control method of the above-mentioned intelligent water mixing system, as shown in FIG. 2 . The control method steps of the intelligent water mixing system of the gas water heater are as follows:

S1. Start the water heater, and the water heater enters the standby state;

S2. The user sets the preset water temperature;

S3. When it is detected that the user has a demand for use, the water flow detector, the inlet water temperature detector and the outlet water temperature detector detect the flow frequency of the inflow water and the temperature of the inlet and outlet water and feed them back to the control center 90;

S4. The control center 90 calculates whether the preset water temperature requirement can be met within the load range of the burner 20 according to the water flow rate and the preset temperature, and if it can be satisfied, it will go to S5, and if it cannot be satisfied, it will go to S8;

S5. Adjust the electric three-way valve 50 to the preset state, so that part of the water flow flows into the heat exchanger 30 for heating, and part of the water flow flows into the water outlet pipe 80 along the second branch pipe 70, while adjusting the load of the burner 20 to meet the preset water temperature requirements , enter S6;

S6. The outlet water temperature sensor 91 detects and feeds back the outlet water temperature to the control center 90, and the control center 90 compares the real-time water temperature with the preset temperature, and enters S7 if the water temperature changes relative to the preset temperature;

S7. The water flow detector feeds back the water flow to the control center 90, and the control center 90 adjusts the split ratio of the electric three-way valve 50 and the load of the burner 20 according to the data to enter the water temperature adjustment step;

S8. Determine whether the maximum load of the burner 20 cannot meet the demand or the minimum load cannot meet the demand, if the maximum load cannot meet the demand, go to S9, if the minimum load cannot meet the demand, go to S10;

S9. Adjust the load of the burner 20 to the maximum, and the electric three-way valve 50 does not work so that the water flow all flows into the heat exchanger 30;

S10. Adjust the load of the burner 20 to the minimum, and start the electric three-way valve 50 to adjust the water temperature to the preset water temperature by adjusting the hot and cold water. When the outlet water temperature changes, the electric three-way valve 50 is adjusted to control the water temperature. If the through valve 50 is opened to the maximum or the preset temperature cannot be reached, the load of the burner 20 is adjusted to the minimum, and the electric three-way valve 50 is opened to the maximum.

The above-mentioned water temperature adjustment step is preferably:

The water temperature adjustment steps are:

S7.1. The control center 90 compares whether the outlet water temperature decreases or increases, and if it increases, it will enter S7.2, and if it decreases, it will enter S7.3;

S7.2. The control center 90 drives the electric three-way valve 50 to open so that the water flow into the heat exchanger 30 is reduced, and the water flow into the water outlet pipe 80 is increased to quickly make the water temperature reach the preset temperature;

S7.3. The control center 90 drives the electric three-way valve 50 to open small, so that the water flow into the heat exchanger 30 increases, and the water flow into the water outlet pipe 80 decreases, so that the water temperature quickly reaches the preset temperature.

For further improvement, in order to better cope with the next water temperature change, it is preferable to further include step S7.4. The step S7.4 is: after the step S7.2 is completed, the control center 90 controls the burner 20 to reduce the load At the same time, the electric three-way valve 50 is driven to gradually decrease to the preset state. If the current state of the electric three-way valve 50 cannot be opened to the preset state when the load of the burner 20 is adjusted to the minimum, it means that the minimum value of the burner 20 If the load cannot meet the preset water temperature, it will directly enter S10.

Similarly, step S7.5 is also included. The step S7.5 is: after the step S7.3 is completed, the control center 90 controls the burner 20 to increase the load, and simultaneously drives the electric three-way valve 50 to gradually open to the preset state. If the burner 20 load is adjusted to When the current state of the electric three-way valve 50 is at the maximum, the current state of the electric three-way valve 50 still cannot be opened to the preset state, the load of the burner 20 remains at the maximum, and the electric three-way valve 50 remains in the current state.

In the above solution, the preset state of the electric three-way valve 50 can be formulated according to specific conditions, and preferably, the preset state of the electric three-way valve 50 is a half-open state.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by the contents of the description and drawings of the present invention, or directly or indirectly applied to other All relevant technical fields are included in the scope of patent protection of the present invention.

Claims (9)

1. an intelligent water mixing system of a gas water heater, characterized in that, comprising: housing (10); a burner (20), wherein the burner (20) is arranged in a casing (10), and an air intake joint communicated with the burner (20) is arranged on the casing (10); a heat exchanger (30), the heat exchanger (30) is arranged on the burner (20); a water inlet pipe (40), the water inlet pipe (40) is arranged on the casing (10); a water outlet pipe (80), the water outlet pipe (80) is communicated with the outlet end of the heat exchanger (30), and the end of the water outlet pipe (80) is arranged on the casing (10); An electric three-way valve (50), the a port of the electric three-way valve (50) is arranged at the end of the water inlet pipe (40), and the b port of the electric three-way valve (50) is connected with a first shunt pipe (60) , the first shunt pipe (60) is communicated with the inlet end of the heat exchanger (30), the c port of the electric three-way valve (50) is connected with a second shunt pipe (70), and the second shunt pipe (70) is connected to The water outlet pipe (80) is connected; a water flow sensor, which is arranged in the water inlet pipe (40); an inlet water temperature sensor (92), the inlet water temperature sensor (92) is arranged in the first shunt pipe (60) or in the water inlet pipe (40); an outlet water temperature sensor (91), the outlet water temperature sensor (91) being arranged in the outlet pipe (80); A control center (90) is electrically connected with the burner (20), the electric three-way valve (50), the water flow sensor, the inlet water temperature sensor (92) and the outlet water temperature sensor (91). 2. The intelligent water mixing system of a gas water heater as claimed in claim 1, wherein: The inlet water temperature sensor (92) is arranged in the first branch pipe (60). 3. The intelligent water mixing system of a gas water heater as claimed in claim 1, wherein: The outlet water temperature sensor (91) is arranged at the end of the outlet pipe (80). 4. The intelligent water mixing system of a gas water heater as claimed in claim 1, wherein: A safety valve is provided at the end of the water outlet pipe (80). 5. The control method of the intelligent water mixing system of any one of the gas water heaters according to any one of claims 1 to 4, characterized in that, comprising: S1. Start the water heater, and the water heater enters the standby state; S2. The user sets the preset water temperature; S3. When it is detected that the user has a demand for use, the water flow detector, the inlet water temperature detector and the outlet water temperature detector detect the flow frequency of the inflow water and the temperature of the inlet and outlet water and feed it back to the control center (90); S4. The control center (90) calculates whether the preset water temperature requirement can be met within the load range of the burner (20) according to the water flow rate and the preset temperature, and if it can be satisfied, it will go to S5, and if it cannot be satisfied, it will go to S8; S5. Adjust the electric three-way valve (50) to the preset state, so that part of the water flow flows into the heat exchanger (30) for heating, and part of the water flow flows into the water outlet pipe (80) along the second branch pipe (70), while adjusting the burner (20) Load to meet the preset water temperature requirement, and enter S6; S6. The water outlet temperature sensor (91) detects and feeds back the water outlet temperature to the control center (90), and the control center (90) compares the real-time water temperature with the preset temperature, and enters S7 if the water temperature changes relative to the preset temperature; S7. The water flow detector feeds back the water flow to the control center (90), and the control center (90) adjusts the diversion ratio of the electric three-way valve (50) and the burner (20) load according to the data and enters the water temperature adjustment step; S8. Determine whether the maximum load of the burner (20) cannot meet the demand or the minimum load cannot meet the demand, if the maximum load cannot meet the demand, go to S9, if the minimum load cannot meet the demand, go to S10; S9. Adjust the load of the burner (20) to the maximum, and the electric three-way valve (50) does not work so that all the water flows into the heat exchanger (30); S10. Adjust the load of the burner (20) to the minimum, start the electric three-way valve (50) to adjust the water temperature to the preset water temperature by adjusting the example of cold and hot water, and adjust the electric three-way valve (50) when the outlet water temperature changes. To control the water temperature, if the electric three-way valve (50) is opened to the maximum and the preset temperature cannot be reached, the load of the burner (20) is adjusted to the minimum, and the electric three-way valve (50) is opened to the maximum. 6. The control method of the intelligent water mixing system of a gas water heater as claimed in claim 5, characterized in that: The water temperature adjustment steps are: S7.1. The control center (90) compares whether the outlet water temperature is lowered or raised, and if it is raised, it will go to S7.2, and if it is lowered, it will go to S7.3; S7.2. The control center (90) drives the electric three-way valve (50) to open so that the water flow into the heat exchanger (30) decreases, and the water flow into the water outlet pipe (80) increases, so that the water temperature quickly reaches the preset temperature ; S7.3. The control center (90) drives the electric three-way valve (50) to open small, so that the water flow into the heat exchanger (30) increases, and the water flow into the water outlet pipe (80) decreases, so that the water temperature quickly reaches the preset value. Set temperature. 7. The control method of the intelligent water mixing system of a gas water heater as claimed in claim 6, wherein: S7.4. After the step S7.2 is completed, the control center (90) controls the burner (20) to reduce the load, and simultaneously drives the electric three-way valve (50) to gradually reduce to the preset state, if the burner (20) ) when the load is adjusted to the minimum, and the current state of the electric three-way valve (50) still cannot be reduced to the preset state, then enter S10. 8. The control method of the intelligent water mixing system of a gas water heater as claimed in claim 6, wherein: S7.5. After the step S7.3 is completed, the control center (90) controls the burner (20) to increase the load, and simultaneously drives the electric three-way valve (50) to gradually open to a preset state, if the burner (20) When the ) load is adjusted to the maximum, the current state of the electric three-way valve (50) still cannot be opened to the preset state, then the load of the burner (20) remains at the maximum, and the electric three-way valve (50) remains in the current state. 9. The control method of the intelligent water mixing system of a gas water heater according to claim 5 or 6 or 7 or 8, wherein: The preset state of the electric three-way valve (50) is a half-open state.

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