Microbubble generating device and control method for a water heater

Abstract

The present invention discloses a microbubble generating device and a control method for a water heater. The bubble water generating device includes a heat exchanger body, the heat exchanger body is communicated with a water inlet pipe and a water outlet pipe, a connecting pipe is communicated between the water inlet pipe and the water outlet pipe, and further includes: a throttling mechanism, the throttling mechanism includes a valve body, a solenoid valve and a check valve. The valve body has a communicated water inlet, a water outlet and an air inlet. The water inlet is communicated with the connecting pipe at a position close to the water inlet pipe, the water outlet is communicated with the connecting pipe at a position close to the water outlet pipe, the solenoid valve is arranged on the valve body to switch on and off between the water inlet and the water outlet, and the check valve is arranged on the air inlet; a controller, a dissolved air tank, a water flow sensor and a water pump are sequentially arranged on the connecting pipe between the throttling mechanism and the water outlet pipe along the water flow direction. The solenoid valve, the water flow sensor and the water pump are respectively electrically connected with the controller. The structure is simple, and the gas water heater can realize the function of microbubble water.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a microbubble generating device and a control method for a water heater. Background Art

[0002] Nano microbubble water has the effects of sterilization, deep cleaning, etc., and does not produce harmful substances to the human body, and has become a new trend in the hot water supply equipment industry. At present, there are mainly two types of nano bubble water generating devices for gas water heaters. One is to press air into the water body through bubbles. Utilizing the characteristic that water cannot be compressed, a high pressure is formed locally in the water body, so that a large amount of air is dissolved in the water to form nano microbubble water. A high-power air pump is required to press air into the tap water, and the air pump has a large volume, high operating power consumption and high noise, and is not suitable for gas water heaters. The second is to suck air through the flow of tap water, and then use a microbubble water outlet device to break up and dissolve the larger air bubbles in the water to form nano microbubble water. However, when the water pressure is insufficient, it is difficult to suck in enough air to form microbubble water, and the use effect is not good. Summary of the Invention

[0003] The present invention aims to solve at least one of the problems existing in the related art to a certain extent. For this reason, the present invention provides a microbubble generating device for a water heater, which has a simple structure and can enable a gas water heater to realize the microbubble water function.

[0004] In addition, the present invention provides a control method for a gas water heater, which is simple and feasible and can effectively improve the stability of microbubble water generation.

[0005] The above first object is achieved by the following technical solutions:

[0006] A microbubble generating device for a water heater, including a heat exchanger body, the heat exchanger body is connected to a water inlet pipe and a water outlet pipe, a connecting pipe is connected between the water inlet pipe and the water outlet pipe, a gas valve is arranged on the heat exchanger body, and further includes:

[0007] A throttling mechanism, the throttling mechanism includes a valve body, an electromagnetic valve and a check valve. The valve body has a water inlet, a water outlet and an air inlet that are connected. The water inlet is connected to the connecting pipe at a position close to one end of the water inlet pipe, the water outlet is connected to the connecting pipe at a position close to one end of the water outlet pipe, the electromagnetic valve is arranged on the valve body to control the on-off between the water inlet and the water outlet, and the check valve is arranged on the air inlet;

[0008] A controller. A dissolved air tank, a water flow sensor and a water pump are sequentially arranged along the water flow direction at a position between the throttling mechanism and the water outlet pipe of the connecting pipe. The electromagnetic valve, the water flow sensor and the water pump are respectively electrically connected to the controller.

[0009] In some embodiments, the flow intercepting mechanism further includes an air nozzle, which is disposed on the air inlet and at one end of the one-way valve away from the valve body.

[0010] A microbubble generating device for a water heater according to claim 1, wherein the one-way valve is unidirectionally opened in the direction from the air inlet to the inside of the valve body.

[0011] In some embodiments, a flow deflector is further included, which is disposed in the air dissolving tank to mix the air and the water supply entering the air dissolving tank.

[0012] In some embodiments, the flow deflector has a flow deflector tube, one end of which is connected to the water inlet end of the air dissolving tank, the other end is a closed end, and a plurality of water through holes are formed in the side wall of the flow deflector tube.

[0013] In some embodiments, the volume of the air dissolving tank is greater than 1 L.

[0014] The above second object is achieved by the following technical solutions:

[0015] A control method for a gas water heater, which is applied to the bubble water generating device according to any one of the above embodiments. The control method for the gas water heater includes the following steps:

[0016] After the gas water heater enters the microbubble standby mode;

[0017] Judge whether the current water flow value is greater than a preset start-up flow value, and close the solenoid valve according to the judgment result;

[0018] At the same time, start the water pump to make the gas water heater enter the microbubble inflation mode, so as to discharge the stored water in the air dissolving tank outwards, and introduce external air into the air dissolving tank;

[0019] Judge whether the current water flow value is less than the preset start-up flow value, and reopen the solenoid valve according to the judgment result;

[0020] Judge again whether the current water flow value is greater than the preset start-up flow value, and decide whether to open the gas valve according to the judgment result, so that the gas water heater enters the microbubble operation mode;

[0021] Judge again whether the current water flow value is greater than the preset start-up flow value, and decide to close the water pump and the gas valve at the same time according to the judgment result, so that the gas water heater exits the microbubble operation mode.

[0022] In some embodiments, the steps of determining whether the current water flow value is greater than a preset startup flow value and closing the solenoid valve according to the determination result include:

[0023] Determine whether the current water flow value is greater than the preset startup flow value;

[0024] If so, close the solenoid valve;

[0025] If not, return the gas water heater to the microbubble standby mode.

[0026] In some embodiments, the steps of determining whether the current water flow value is less than the preset startup flow value and reopening the solenoid valve according to the determination result include:

[0027] Determine whether the current water flow value is less than the preset startup flow value;

[0028] If so, reopen the solenoid valve;

[0029] If not, return the gas water heater to the microbubble inflation mode.

[0030] In some embodiments, the steps of determining again whether the current water flow value is greater than the preset startup flow value and deciding to open the gas valve according to the determination result include:

[0031] Determine again whether the current water flow value is greater than the preset startup flow value;

[0032] If so, open the gas valve;

[0033] If not, return the gas water heater to the microbubble standby mode.

[0034] In some embodiments, the steps of determining again whether the current water flow value is greater than the preset startup flow value and deciding to close the water pump and the gas valve simultaneously according to the determination result include:

[0035] Determine again whether the current water flow value is greater than the preset startup flow value;

[0036] If so, return the gas water heater to the microbubble operation mode;

[0037] If not, close the water pump and the gas valve simultaneously.

[0038] In some embodiments, the steps after discharging the stored water in the air dissolution tank and introducing external air into the air dissolution tank further include:

[0039] Obtain the drainage volume of the stored water discharged from the air dissolution tank;

[0040] Determine whether the displacement is greater than the volume of the dissolved air tank; if so, reopen the solenoid valve; if not, return the gas water heater to the microbubble inflation mode.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects:

[0042] 1. The microbubble generating device of the gas water heater of the present invention has a simple structure and can enable the gas water heater to realize the function of microbubble water.

[0043] 2. The control method of the gas water heater of the present invention is simple and feasible, and can effectively improve the stability of microbubble water generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic structural diagram of the microbubble generating device in Embodiment 1 of the present invention;

[0045] Figure 2 is a schematic structural diagram of the throttling mechanism in Embodiment 1 of the present invention;

[0046] Figure 3 is a schematic flowchart of the gas water heater control method in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0047] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of the technical solutions claimed by the present invention.

[0048] Embodiment 1:

[0049] As Figure 1 and 2 shown, this embodiment provides a microbubble generating device for a water heater, including a heat exchanger body 1, the heat exchanger body 1 is connected to a water inlet pipe 11 and a water outlet pipe 12, a connecting pipe 13 is connected between the water inlet pipe 11 and the water outlet pipe 12, a gas valve 14 is provided on the heat exchanger body 1, and further includes:

[0050] The flow cutoff mechanism 2, the flow cutoff mechanism 2 includes a valve body 21, a solenoid valve 22 and a check valve 23. The valve body 21 has a water inlet 24, a water outlet 25 and an air inlet 26 that are connected and communicated. The water inlet 24 is communicated with the connecting pipe 13 at one end close to the water inlet pipe 11. The water outlet 25 is communicated with the connecting pipe 13 at one end close to the water outlet pipe 12. The solenoid valve 22 is arranged on the valve body 21 to cut off or connect between the water inlet 24 and the water outlet 25. The check valve 23 is arranged on the air inlet 26;

[0051] The controller 3, the connecting pipe 13 is sequentially provided with a dissolved air tank 4, a water flow sensor 5, and a water pump 6 along the water flow direction at a position between the flow cutoff mechanism 2 and the water outlet pipe 12. The solenoid valve 22, the water flow sensor 5, and the water pump 6 are respectively electrically connected to the controller 3.

[0052] In this embodiment, one end of the heat exchanger body 1 is communicated with external water supply through the water inlet pipe 11, and the other end is communicated with an external water use point through the water outlet pipe 12. A connecting pipe 13 is communicated at a position between the water inlet pipe 11 and the water outlet pipe 12, so that one end of the connecting pipe 13 is communicated with the water inlet pipe 11, and the other end of the connecting pipe 13 is connected to the water outlet pipe 12. The connecting pipe 13 is sequentially provided with a valve body 21, a dissolved air tank 4, a water flow sensor 5, and a water pump 6 at one end close to the water outlet pipe 12, so as to avoid abnormal noise generated by the boiling of microbubble water on the inner wall of the heat exchange tube. The solenoid valve 22 is switched on or off to conduct or disconnect the pipeline of the connecting pipe 13, so that the external water supply flows into the connecting pipe 13 and then flows into the valve body 21 through the water inlet 24. The water supply flowing into the valve body 21 then flows out through the water outlet 25. At the same time, the external air sequentially flows into the dissolved air tank 4 through the air inlet 26, the water outlet 25, and the connecting pipe 13, or the external air enters the valve body 21 through the air inlet 26 and then flows into the dissolved air tank 4 through the water outlet 25 and the connecting pipe 13 along with the water supply. The controller 3 controls the solenoid valve 22, the water flow sensor 5, and the water pump 6 to work together to enable the gas water heater to realize the microbubble water function. Its structure is simple and the gas water heater can realize the microbubble water function.

[0053] In this embodiment, the valve body 21 is a housing structure with a hollow cavity. An inlet 24 is provided at the upper end of the valve body 21, an outlet 25 is provided at the lower end of the valve body 21, and an air inlet 26 for introducing external air is provided on the left or right side of the valve body 21. The inlet 24 and the outlet 25 are respectively communicated with the connecting pipe 13. Thus, after the external water supply enters the connecting pipe 13, it enters the valve body 21 through the inlet 24, and the water supply entering the valve body 21 flows into the outlet pipe 12 through the outlet 25. More preferably, the apertures of the inlet 24 and the outlet 25 are preferably set to be greater than 9 mm. An installation seat is provided on the valve body 21, and the solenoid valve 22 is arranged on the installation seat to control the on-off of the water path of the valve body 21. In this embodiment, the valve body 21 is preferably formed by die-casting of corrosion-resistant metal or injection molding of high-strength plastic. In addition, in this embodiment, the solenoid valve 22 is preferably a normally open pilot-operated solenoid valve 22, which is beneficial to reducing power consumption.

[0054] In this embodiment, an air inlet hole is provided on the dissolved air tank 4, so that the air inlet 26 can be cancelled on the valve body 21, and then the check valve 23 is arranged on the air inlet hole of the dissolved air tank 4. Similarly, the conducting direction of the check valve 23 is unidirectionally opened from the outside of the dissolved air tank 4 to the inside of the dissolved air tank 4, and a nozzle 27 is also provided on the check valve 23, so as to achieve the same effect of negative pressure suction. In addition, the water flow sensor 5 is adapted to monitor the water flow rate in real time to obtain the current water flow value. Since the water flow sensor 5 is arranged at the rear end of the dissolved air tank 4, it is beneficial to monitor the drainage volume or to identify whether the dissolved air tank 4 is full of air through the change of the water flow rate. The gas control valve is installed on the heat exchanger body 1 to control the on-off of the gas supply path, so as to control the opening and closing of the gas. More preferably, an operation display is provided on the outer wall of the heat exchanger body 1, and the operation display is provided with a micro-bubble button for turning on the micro-bubble mode. The user can quickly enter the micro-bubble water function of the gas water heater through the micro-bubble button. The micro-bubble water function includes a micro-bubble standby mode, a micro-bubble inflation mode and a micro-bubble operation mode in sequence, so that the gas water heater can perform micro-bubble water work.

[0055] Further, the throttling mechanism 2 further includes a nozzle 27, and the nozzle 27 is arranged on the air inlet 26 and is located at one end of the check valve 23 away from the valve body 21.

[0056] Preferably, the conducting direction of the check valve 23 is unidirectionally opened from the air inlet 26 to the inside of the valve body 21. Its design is reasonable, which can effectively introduce external air into the valve body 21, and at the same time can effectively prevent the water flow in the valve body 21 from overflowing out through the air inlet 26.

[0057] Specifically, it further includes a spoiler 7 which is arranged in the dissolved air tank 4 to mix the air and the water supply entering the dissolved air tank 4. Its structure is simple and helps the air to dissolve into the water more easily to form microbubble water.

[0058] Preferably, the spoiler 7 has a spoiler tube. One end of the spoiler tube is communicated with the water inlet end of the dissolved air tank 4, and the other end is a closed end. A plurality of water through holes are formed in the side wall of the spoiler tube.

[0059] Particularly, the volume of the dissolved air tank 4 is greater than 1L. Its design is reasonable and ingenious, which helps to extend the output time of the microbubble water.

[0060] In this embodiment, the dissolved air tank 4 has a hollow tank-shaped housing, so that the external water supply enters the dissolved air tank 4 through the connecting pipe 13 and the upper end of the container tank in sequence. The water supply entering the dissolved air tank 4 is discharged outwards through the lower end of the container tank and the water outlet pipe 12 in sequence. A spoiler 7 for mixing tap water and air is arranged in the inner cavity of the dissolved air tank 4, which helps the air to dissolve into the water more easily to form microbubble water. In this embodiment, the spoiler 7 has a spoiler tube. One end of the spoiler tube is communicated with the water inlet end of the dissolved air tank 4, and the other end is a closed end. A plurality of water through holes are spacedly formed in the side wall of the spoiler tube. Of course, the spoiler 7 can also adopt different structural types to achieve the water-air mixing effect of the air and the water supply entering the dissolved air tank 4, so as to enhance the gas-liquid mixing effect under the action of the spoiler 7, and further realize the stability of the generation of microbubble water. In this embodiment, the dissolved air tank 4 is preferably set to be formed by stamping and brazing of high-strength corrosion-resistant metal plates.

[0061] In this embodiment, the water path of the connecting pipe 13 is disconnected by the solenoid valve 22 so that the external air enters the dissolved air tank 4 through the one-way valve 23, so that the dissolved air tank 4 is pre-filled with air. Then the solenoid valve 22 conducts the water path of the connecting pipe 13 so that the external water supply enters the dissolved air tank 4 through the connecting pipe 13, and at the same time the external air enters the dissolved air tank 4 together with the external water supply through the one-way valve 23. Under the action of the spoiler 7, the external air and the external water supply are subjected to gas-liquid mixing, and the liquid and gas are further mixed by the high-speed operation of the water pump 6, so as to continuously output microbubble water outwards.

[0062] Embodiment Two:

[0063] As Figure 3As shown in the figure, this embodiment provides a control method for a gas water heater, which is applied to the microbubble generating device described in Embodiment 1. The water path of the connecting pipe is disconnected by a solenoid valve so that external air enters the air dissolving tank through a check valve, thereby pre-filling the air dissolving tank with air. Then, the solenoid valve conducts the water path of the connecting pipe so that external water supply enters the air dissolving tank through the connecting pipe, and at the same time, external air enters the air dissolving tank together with the external water supply through the check valve. Under the action of the spoiler, the external air and the external water supply are mixed in gas-liquid, and the liquid and gas are further mixed by the high-speed operation of the water pump, so as to continuously output microbubble water outward. The method is simple and feasible, and can effectively improve the stability of microbubble water generation.

[0064] The control method of the gas water heater in this embodiment specifically includes the following steps:

[0065] Step S101, after the gas water heater enters the microbubble standby mode.

[0066] In this embodiment, when the gas water heater is in the normal shower mode, the controller opens the solenoid valve, and at this time, the water path between the water inlet pipe and the water outlet pipe is conducted. After the water is supplied in the normal shower mode, since the water pressure at the air inlet hole is positive pressure, external air cannot be inhaled into the valve body, so that the gas water heater does not generate microbubble water.

[0067] In the normal shower mode, the operator starts the microbubble water function by operating the microbubble button on the display, that is, the gas water heater is switched from the normal shower mode to the microbubble standby mode.

[0068] Step S102, determine whether the current water flow value is greater than the preset start-up flow value, and close the solenoid valve according to the judgment result.

[0069] Specifically, determine whether the current water flow value is greater than the preset start-up flow value;

[0070] If it is, close the solenoid valve;

[0071] If not, return the gas water heater to the microbubble standby mode.

[0072] In this embodiment, the preset start-up flow value is preferably set to 2.5 L / min, but is not limited to the above water volume value. Of course, other more appropriate water volume values can also be selected according to actual needs.

[0073] Step S103, start the water pump at the same time to make the gas water heater enter the microbubble inflation mode, thereby discharging the stored water in the air dissolving tank outward and introducing external air into the air dissolving tank.

[0074] In this embodiment, after the gas water heater is filled with water, if the water flow sensor measures that the current water flow value is greater than the preset startup flow value, the controller closes the cut-off solenoid valve and turns on the water pump to switch the gas water heater from the microbubble standby mode to the microbubble inflation mode. In the microbubble inflation mode, the solenoid valve disconnects the water path between the water inlet pipe and the water outlet pipe, the water pump runs at high speed to drain the stored water in the dissolved air tank, and a negative pressure exceeding 50,000 Pa is formed at the water outlet hole of the throttling mechanism, so that external air is sequentially introduced into the interior of the dissolved air tank through the air inlet and the water outlet, and gradually fills the dissolved air tank with air.

[0075] Step S104, determine whether the current water flow value is less than the preset startup flow value, and reopen the solenoid valve according to the determination result.

[0076] Preferably, determine whether the current water flow value is less than the preset startup flow value;

[0077] If so, reopen the solenoid valve;

[0078] If not, return the gas water heater to the microbubble inflation mode.

[0079] In this embodiment, in the microbubble inflation mode, the controller again obtains the current water flow value according to the water flow measured by the water flow sensor in real time. If the current water flow value is less than the preset startup flow value, it is initially determined that the dissolved air tank has drained the stored water and is filled with air. The controller opens the solenoid valve to reconnect the water path between the water inlet pipe and the water outlet pipe, so that external water supply flows back into the dissolved air tank again.

[0080] In this embodiment, it is also possible to compare the drainage volume with the volume of the dissolved air tank, and then decide to reopen the solenoid valve according to the comparison result. Specifically, first obtain the drainage volume of the stored water in the dissolved air tank being drained outwards. Then determine whether the drainage volume is greater than the volume of the dissolved air tank; if so, reopen the solenoid valve; if not, return the gas water heater to the microbubble inflation mode. Here, the controller obtains the drainage volume by measuring the water flow in real time with the water flow sensor and performing a summation calculation. If the drainage volume is greater than the volume of the dissolved air tank, it is determined that the dissolved air tank has drained the stored water and is filled with air. The controller opens the solenoid valve to reconnect the water path between the water inlet pipe and the water outlet pipe, so that external water supply flows back into the dissolved air tank again.

[0081] Step S105, determine again whether the current water flow value is greater than the preset startup flow value, and decide to open the gas valve according to the determination result, so that the gas water heater enters the microbubble operation mode.

[0082] Specifically, determine again whether the current water flow value is greater than the preset startup flow value;

[0083] If so, open the gas valve;

[0084] If not, the gas water heater returns to the microbubble standby mode.

[0085] In this embodiment, after the external water supply reflows into the dissolved air tank, the controller measures the water flow rate in real time according to the water flow sensor again to obtain the current water flow rate value. If the current water flow rate value is less than the preset startup flow rate value, it is determined that the user has turned off the water, and the controller turns off the water pump and switches back to the microbubble standby mode; if the current water flow rate value is greater than the preset startup flow rate value, it is determined that the user is still using water, and the controller opens the control valve to start the gas water heater to ignite and heat the external water supply, so that the gas water heater switches from the microbubble inflation mode to the microbubble operation mode.

[0086] In this embodiment, in the microbubble operation mode, the external water supply flows into the dissolved air tank and mixes with the internal air of the dissolved air tank under the action of the spoiler to form tap water with bubbles, and then is mixed by the high-speed disturbance of the water pump impeller, so that the air is completely dissolved in the water, and then microbubble water with an air-liquid mixing ratio of about 3% to 8% is formed. In addition, if the volume of the dissolved air tank is 1.5L and the outlet water flow rate is set to 6L / min, the gas water heater can continuously output microbubble water for 10 minutes.

[0087] Step S106, determine again whether the current water flow rate value is greater than the preset startup flow rate value, and decide to turn off the water pump and the gas valve at the same time according to the judgment result, so that the gas water heater exits the microbubble operation mode.

[0088] Specifically, determine again whether the current water flow rate value is greater than the preset startup flow rate value;

[0089] If so, the gas water heater continues to return to the microbubble operation mode;

[0090] If not, turn off the water pump and the gas valve at the same time.

[0091] In this embodiment, in the microbubble operation mode, the controller measures the water flow rate in real time according to the water flow sensor again to obtain the current water flow rate value. If the current water flow rate value is greater than the preset startup flow rate value, the controller controls the gas water heater to continue to return to the microbubble operation mode, so as to continue the output work of the microbubble water; if the current water flow rate value is less than the preset startup flow rate value, the water pump and the gas valve are turned off at the same time, so as to turn off the gas water heater.

[0092] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A control method for a water heater, including a heat exchanger body (1), the heat exchanger body (1) is connected to a water inlet pipe (11) and a water outlet pipe (12), a connecting pipe (13) is connected between the water inlet pipe (11) and the water outlet pipe (12), and a gas valve (14) is provided on the heat exchanger body (1), characterized in that, Further included are: A flow interception mechanism (2), the flow interception mechanism (2) includes a valve body (21), a solenoid valve (22) and a check valve (23), the valve body (21) has a water inlet (24), a water outlet (25) and an air inlet (26) that are connected and communicated, the water inlet (24) is communicated with the connecting pipe (13) at one end close to the water inlet pipe (11), the water outlet (25) is communicated with the connecting pipe (13) at one end close to the water outlet pipe (12), the solenoid valve (22) is arranged on the valve body (21) to open and close between the water inlet (24) and the water outlet (25), and the check valve (23) is arranged on the air inlet (26); A controller (3), a dissolved air tank (4), a water flow sensor (5), and a water pump (6) are sequentially arranged along the water flow direction at a position between the flow interception mechanism (2) and the water outlet pipe (12) of the connecting pipe (13), and the solenoid valve (22), the water flow sensor (5), and the water pump (6) are respectively electrically connected to the controller (3); The check valve (23) is unidirectionally opened in the direction from the air inlet (26) to the inside of the valve body (21); The control method of the gas water heater includes the following steps: After the gas water heater enters the microbubble standby mode; Judge whether the current water flow value is greater than the preset start-up flow value; if so, close the solenoid valve; if not, return the gas water heater to the microbubble standby mode; At the same time, start the water pump to make the gas water heater enter the microbubble inflation mode, so as to discharge the stored water in the dissolved air tank outwards and introduce external air into the dissolved air tank; Judge whether the current water flow value is less than the preset start-up flow value, and reopen the solenoid valve according to the judgment result; Judge again whether the current water flow value is greater than the preset start-up flow value, and decide whether to open the gas valve according to the judgment result, so that the gas water heater enters the microbubble operation mode; Judge again whether the current water flow value is greater than the preset start-up flow value, and decide to close the water pump and the gas valve at the same time according to the judgment result, so that the gas water heater exits the microbubble operation mode.

2. The control method of a water heater according to claim 1, wherein The flow interception mechanism (2) further includes a nozzle (27), and the nozzle (27) is arranged on the air inlet (26) and is located at one end of the check valve (23) far from the valve body (21).

3. The control method of a water heater according to claim 1, characterized in that Further included is a turbulator (7), and the turbulator (7) is arranged in the dissolved air tank (4) to mix the air and the water supply entering the dissolved air tank (4).

4. The control method of a water heater according to claim 3, characterized in that, The turbulator (7) has a turbulator pipe, one end of the turbulator pipe is communicated with the water inlet end of the dissolved air tank (4), the other end is a closed end, and a plurality of water through holes are opened on the side wall of the turbulator pipe.

5. A control method for a water heater according to any one of claims 1 to 4, characterized in that The volume of the dissolved air tank (4) is greater than 1L.

6. The control method of a water heater according to claim 1, characterized in that, The step of judging whether the current water flow value is less than the preset start-up flow value and reopening the solenoid valve according to the judgment result includes: Judge whether the current water flow value is less than the preset start-up flow value; If so, reopen the solenoid valve; If not, return the gas water heater to the microbubble inflation mode.

7. A control method for a water heater according to claim 1, characterized in that, The step of determining again whether the current water flow value is greater than the preset startup flow value and deciding whether to open the gas valve according to the determination result includes: Determine again whether the current water flow value is greater than the preset startup flow value; If so, open the gas valve; If not, return the gas water heater to the microbubble standby mode.

8. A control method for a water heater according to claim 1, characterized in that, The step of determining again whether the current water flow value is greater than the preset startup flow value and deciding whether to close the water pump and the gas valve simultaneously according to the determination result includes: Determine again whether the current water flow value is greater than the preset startup flow value; If so, return the gas water heater to the microbubble operation mode; If not, close the water pump and the gas valve simultaneously.

9. The control method of a water heater according to claim 1, characterized in that The step of discharging the stored water in the dissolved air tank and introducing external air into the dissolved air tank further includes: Obtain the drainage volume of the stored water discharged from the dissolved air tank; Judge whether the drainage volume is greater than the volume of the dissolved air tank; if so, reopen the solenoid valve; if not, return the gas water heater to the microbubble inflation mode.

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