CN115597225A

CN115597225A - Water heater and control method thereof

Info

Publication number: CN115597225A
Application number: CN202110708138.7A
Authority: CN
Inventors: 陈小平; 刘韬; 王成; 闵杰
Original assignee: Yunmi Internet Technology Guangdong Co Ltd
Current assignee: Yunmi Internet Technology Guangdong Co Ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2023-01-13

Abstract

The invention relates to the technical field of household appliances, and particularly discloses a water heater and a control method thereof. The water heater comprises a first water conveying pipeline, a second water conveying pipeline, a third water conveying pipeline, an air supply pipeline, a heating device, a gas-liquid mixing device, a first water pump, a control valve, a first water flow detection device, a second water flow detection device, a flow direction control valve and a control device; the first water conveying pipeline is communicated with the heating device; the first water flow detection device is arranged on the first water conveying pipeline; the second water conveying pipeline is communicated with the heating device and the gas-liquid mixing device; the control valve is arranged on the second water conveying pipeline; the gas supply pipeline is communicated with the gas-liquid mixing device; the third water conveying pipeline is communicated with the gas-liquid mixing device, and the first water pump and the second water flow detection device are arranged on the third water conveying pipeline; the control device is connected with the first water pump, the control valve and the heating device and is used for controlling the working states of the heating device, the first water pump and the control valve. The water heater of the invention provides micro-bubble water with high micro-bubble content.

Description

Water heater and control method thereof

Technical Field

The invention relates to the technical field of household appliances, in particular to a water heater and a control method thereof.

Background

Along with the increasing improvement of living standard of people, the comfort requirement of people in family life is higher and higher. The water heater is used as a household appliance frequently used in life of people, normal-temperature water or low-temperature water can be heated to the temperature required by a user in a short time, and therefore the water heater is used by the user. However, the existing water heater can only provide common hot water, and the function is single. For the function that increases the water heater, also some water heaters have set up little bubble water play water effect, but the microbubble content in the microbubble water that produces is not high, and the microbubble effect is limited, leads to user experience not good.

Disclosure of Invention

The embodiment of the invention aims to provide a water heater and a control method thereof, and aims to solve the problem that the micro-bubble effect of micro-bubble water produced by the water heater is poor.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:

the water heater comprises a first water conveying pipeline, a second water conveying pipeline, a third water conveying pipeline, an air supply pipeline, a heating device, a gas-liquid mixing device, a first water pump, a control valve, a first water flow detection device, a second water flow detection device, a flow direction control valve and a control device;

the water outlet end of the first water conveying pipeline is communicated with a heating device; the first water flow detection device is arranged on the first water conveying pipeline and used for detecting the water flow in the first water conveying pipeline;

the water inlet end of the second water conveying pipeline is communicated with a heating device; the water outlet end of the second water conveying pipeline is communicated with the gas-liquid mixing device and is used for conveying water into the gas-liquid mixing device; the control valve is arranged on the second water conveying pipeline and used for controlling the flowing state of water in the second water conveying pipeline;

the gas supply pipeline is communicated with the gas-liquid mixing device and is used for conveying gas into the gas-liquid mixing device; the flow direction control valve is arranged on the air supply pipeline;

the third water conveying pipeline is communicated with the gas-liquid mixing device, and the first water pump and the second water flow detection device are arranged on the third water conveying pipeline;

the control device is connected with the first water pump, the control valve and the heating device and is used for controlling the working states of the heating device, the first water pump and the control valve.

In a possible embodiment, the water heater further comprises an operating device for a user to set a water outlet type of the water heater based on the operating device, the water outlet type of the water heater comprising a microbubble cold water type and a microbubble hot water type.

In a possible embodiment, the control device is connected with the operating device, the first water flow detecting device and the second water flow detecting device, and the control device is used for controlling the working states of the heating device, the first water pump and the control valve according to the set water outlet type of the water heater and the water flow detected by the first water flow detecting device and the second water flow detecting device.

In a possible embodiment, the water heater further comprises a second water pump, and the second water pump is arranged on the first water conveying pipeline and used for driving water in the first water conveying pipeline to flow to the heating device.

In a possible embodiment, the water heater further comprises a liquid level detection device, which is arranged in the gas-liquid mixing device and is used for detecting a water level corresponding to water contained in the gas-liquid mixing device.

The control method of the water heater comprises the following steps:

determining the current water outlet type of the water heater;

when first water flow information detected by the first water flow detection device is received, the working states of the first water pump and the control valve are controlled according to the water outlet type, so that gas is conveyed into the gas-liquid mixing device;

when a first preset condition is reached, controlling the working states of the heating device, the first water pump and the control valve to convey cold water/hot water into the gas-liquid mixing device, wherein the mixed gas and the cold water/hot water are used for producing microbubble cold water or microbubble hot water;

when a second preset condition is reached, controlling the working states of the first water pump and the control valve according to received second water flow information detected by the second water flow detection device so as to convey gas into the gas-liquid mixing device again; and returning to the step of controlling the working states of the heating device, the first water pump and the control valve when the first preset condition is reached.

In a possible embodiment, the reaching of the first preset condition comprises the time of delivery of the gas into the gas-liquid mixing device reaching a first preset time threshold.

In a possible embodiment, the water heater comprises a liquid level detection device arranged in the gas-liquid mixing device, and the reaching of the first preset condition comprises the liquid level detection device detecting that the current water level in the gas-liquid mixing device is reduced to a preset water level.

In a possible embodiment, the reaching of the second preset condition comprises at least one of:

the water yield of the microbubble cold water or the microbubble hot water reaches a preset water yield threshold value;

and the water outlet time of the microbubble cold water or the microbubble hot water reaches a second preset time threshold.

In one possible embodiment, determining the current water outlet type of the water heater comprises:

receiving water outlet type setting information sent by an operating device, wherein the water outlet type setting information is triggered by a user executing setting operation based on the operating device;

and determining the current water outlet type of the water heater according to the water outlet type setting information.

In a possible embodiment, the controlling the working state of the first water pump and the control valve according to the type of the water outlet comprises:

if the water outlet type is the microbubble cold water type, controlling a first water pump to start and operate at a first rotating speed, and controlling a control valve to close;

when reaching first preset condition, the operating condition of control heating device, first water pump and control valve includes:

and when a first preset condition is reached, the control valve is controlled to be opened, and the first water pump is controlled to stop running.

In a possible embodiment, when the second preset condition is reached, controlling the working states of the first water pump and the control valve according to the received second water flow information detected by the second water flow detection device includes:

and when a second preset condition is reached, the control valve is controlled to be closed, and the first water pump is controlled to be started and run at a second rotating speed according to second water flow information.

In a possible embodiment, the water heater comprises a second water pump arranged on the first water conveying pipeline, and the method further comprises:

and when the first preset condition is reached, controlling the second water pump to start and operate at a third rotating speed.

In a possible embodiment, the controlling the working state of the first water pump and the control valve according to the type of the discharged water comprises:

if the water outlet type is the microbubble hot water type, controlling a first water pump to start and operate at a first rotating speed, and controlling a control valve to close;

when a first preset condition is reached, the control valve is controlled to be opened, and the first water pump is controlled to stop running;

and when the first water flow information detected by the first water flow detection device is received again, controlling the heating device to start.

In a possible embodiment, the water heater includes a second water pump disposed on the first water conveying pipeline, and when the first water flow information detected by the first water flow detecting device is received again, the water heater is controlled to start up, including:

and when the first water flow information detected by the first water flow detection device is received again, controlling the second water pump to start and operate at a third rotating speed, and controlling the heating device to start.

The beneficial effects of the invention are as follows:

the water heater provided by the embodiment of the invention comprises a first water conveying pipeline, a second water conveying pipeline, a third water conveying pipeline, an air supply pipeline, a heating device, a gas-liquid mixing device, a first water pump, a control valve, a first water flow detection device, a second water flow detection device, a flow direction control valve and a control device; the water outlet end of the first water conveying pipeline is communicated with a heating device; the first water flow detection device is arranged on the first water conveying pipeline and used for detecting the water flow in the first water conveying pipeline; the water inlet end of the second water conveying pipeline is communicated with a heating device; the water outlet end of the second water conveying pipeline is communicated with the gas-liquid mixing device and is used for conveying water into the gas-liquid mixing device; the control valve is arranged on the second water conveying pipeline and used for controlling the flowing state of water in the second water conveying pipeline; the gas supply pipeline is communicated with the gas-liquid mixing device and is used for conveying gas into the gas-liquid mixing device; the flow direction control valve is arranged on the air supply pipeline; the third water conveying pipeline is communicated with the gas-liquid mixing device, and the first water pump and the second water flow detection device are arranged on the third water conveying pipeline; the control device is connected with the first water pump, the control valve and the heating device and is used for controlling the working states of the heating device, the first water pump and the control valve. Through conveying gas to gas-liquid mixing device in relapse a lot of intermittent type nature, avoid gas content too little among the gas-liquid mixing device to ensure the microbubble content in the microbubble water that produces, promoted the microbubble effect of microbubble water.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a simplified structural schematic diagram of a water heater according to a first embodiment of the present invention;

fig. 2 is a schematic perspective view of a gas-liquid mixing device according to a first embodiment of the present invention;

FIG. 3 is a simplified diagram of a control process of a control device of a water heater according to a first embodiment of the present invention;

fig. 4 is a simplified structural schematic diagram of a water heater according to a second embodiment of the present invention;

fig. 5 is a simplified structural schematic diagram of a water heater according to a third embodiment of the present invention;

FIG. 6 is a schematic flow chart of a first embodiment of a control method of a water heater according to the present invention;

FIG. 7 is a schematic flow chart illustrating the determination of the current water outlet type of the water heater according to the first embodiment of the control method of the water heater of the present invention;

FIG. 8 is a schematic flow chart of a second embodiment of the control method of the water heater of the present invention;

fig. 9 is a flowchart of microbubble cold water produced by the water heater according to the first embodiment in the second embodiment of the control method of the water heater according to the present invention;

fig. 10 is a flowchart of a water heater producing microbubble cold water based on the second embodiment in the second embodiment of the control method of the water heater according to the present invention;

fig. 11 is a flowchart of microbubble cold water produced by the water heater according to the third embodiment in the second embodiment of the control method of the water heater according to the present invention;

FIG. 12 is a schematic flow chart diagram of a third embodiment of a control method for a water heater in accordance with the present invention;

fig. 13 is a flowchart of the microbubble hot water produced by the water heater according to the first embodiment in the third embodiment of the control method of the water heater according to the present invention;

fig. 14 is a flow chart of microbubble hot water produced by the water heater according to the second embodiment in the third embodiment of the control method of the water heater according to the present invention;

fig. 15 is a flow chart of microbubble hot water produced by a water heater according to the third embodiment of the control method of the water heater of the present invention;

reference numerals:

100. a water heater;

1. a first water conveying pipeline;

2. a second water conveying pipeline;

3. a third water conveying pipeline;

4. a gas supply line;

5. a gas-liquid mixing device; 51. a first opening; 52. a second opening;

6. a heating device;

7. a first water pump;

8. a control valve;

9. a first water flow rate detection device;

10. a second water flow rate detection device;

11. a flow direction control valve;

12. a second water pump;

13. liquid level detection device.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Example one

Fig. 1 to fig. 3 are schematic structural diagrams of a water heater 100 and its components provided in this embodiment.

Referring to fig. 1, a water heater 100 of the present embodiment includes a first water transmission pipeline 1, a second water transmission pipeline 2, a third water transmission pipeline 3, an air supply pipeline 4, an air-liquid mixing device 5, a heating device 6, a first water pump 7, a control valve 8, a first water flow rate detection device 9, a second water flow rate detection device 10, a flow direction control valve 11, and a control device (not shown).

Wherein, the water outlet end of the first water transmission pipeline 1 is communicated with the heating device 6, and water is transmitted to the heating device 6 through the first water transmission pipeline 1. The first water flow detection device 9 is disposed on the first water transmission pipeline 1 and is used for detecting water flow in the first water transmission pipeline 1.

The water inlet end of the second water conveying pipeline 2 is communicated with the heating device 6, and the water outlet end of the second water conveying pipeline 2 is communicated with the gas-liquid mixing device 5 so as to convey water into the gas-liquid mixing device 5. The control valve 8 is disposed on the second water conveying pipeline 2 to control a flowing state of water in the second water conveying pipeline 2.

The water inlet end of the third water conveying pipeline 3 is communicated with the gas-liquid mixing device 5, and the first water pump 7 and the second water flow detection device 10 are arranged on the third water conveying pipeline 3. The second water flow detecting device 10 may detect the water flow in the third water conveying pipeline 3, so as to determine whether the water flow in the third water conveying pipeline 3 is stable. At the same time, the power of the first water pump 7 can be controlled to adjust the water flow in the third water conveying pipeline 3.

The gas supply line 4 communicates with the gas-liquid mixing device 5 for supplying gas into the gas-liquid mixing device 5. The flow direction control valve 11 is provided on the gas supply line 4.

The control device is connected with the first water pump 7, the control valve 8 and the heating device 6 and is used for controlling the working states of the heating device 6, the first water pump 7 and the control valve 8.

For example, the control device may control the heating device 6 to be turned on/off, the first water pump 7 to be turned on/off at a corresponding rotation speed, and the control valve 8 to be opened/closed.

As a possible embodiment of the present embodiment, the control valve 8 is a solenoid valve or the like.

As one possible embodiment of this embodiment, the first water flow rate detection device 9 and the second water flow rate detection device 10 are water flow rate sensors or the like.

As a possible implementation manner of this embodiment, the control device is a main controller or the like.

As a possible implementation manner of this embodiment, the flow direction control valve 11 is a check valve or a stop valve. The gas such as air in the air supply line 4 can be prevented from flowing backward by the check valve or the shutoff valve.

As a possible embodiment of the present embodiment, the first water pump 7 is located between the gas-liquid mixing device 5 and the second water flow rate detection device 10.

Referring to fig. 2, as an embodiment of the present embodiment, the gas-liquid mixing device 5 has a first opening 51 and a second opening 52, wherein the first opening 51 is disposed at the top of the gas-liquid mixing device 5, and the second opening 52 is disposed at the bottom of the gas-liquid mixing device 5. The water outlet end of the second water conveying pipeline 2 is connected with the first opening 51, and the water inlet end of the third water conveying pipeline 3 is connected with the second opening 52.

As a preferred embodiment of the present embodiment, the water outlet end of the second water conveying pipeline 2 passes through the first opening 51 and extends into the gas-liquid mixing device 5; the water inlet end of the third water delivery pipeline 3 passes through the second opening 52 and extends into the gas-liquid mixing device 5, so that water flowing into the gas-liquid mixing device 5 from the second water delivery pipeline 2 is fully mixed with gas such as air, and the content of the gas such as the air in the water in the gas-liquid mixing device 5 is further improved, and micro-bubble water with better micro-bubble effect is obtained.

As a possible implementation manner of the present embodiment, the water heater 100 further includes an operating device, which includes, but is not limited to, a touch display, for example. The user can set the water discharge type of the water heater 100 based on the operation device. The water outlet type of the water heater comprises common cold water, common hot water, a micro-bubble cold water type, a micro-bubble hot water type and the like.

Referring to fig. 3, as an embodiment of the present embodiment, the control device is connected to the first water pump 7, the control valve 8, the heating device 6, the operation device, and the first water flow rate detection device 9 and the second water flow rate detection device 10. When the first water flow detection device 9 detects water flow, the detected water flow is sent to the control device, and the control device controls the working states of the heating device 6, the first water pump 7 and the control valve 8 according to the set water outlet type of the water heater and the water flows detected by the first water flow detection device 9 and the second water flow detection device 10, and finally controls the working state of the water heater 100.

The operation of the water heater 100 of the present embodiment is briefly described with reference to fig. 1 to 3:

(a) When a user sets the water outlet type of the water heater to be a microbubble cold water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water conveying pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5.

After the preset time, the control device controls the control valve 8 to open, controls the first water pump 7 to stop running, and conveys cold water into the gas-liquid mixing device 5 to be mixed with gas in the gas-liquid mixing device 5 to generate micro-bubble cold water. For example, a microbubble generator is provided at a water consumption point (such as a faucet, a shower head, etc.) of the water heater 100, and the gas and the cold water mixed in the mixing tank 5 are acted by the microbubble generator to generate microbubble cold water.

When the water yield of the microbubble cold water reaches a preset water yield threshold value or the water outlet time of the microbubble cold water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at a corresponding rotating speed according to the received water flow detected by the second water flow detection device 10. And receiving the rotating speed fed back by the first water pump 7, and controlling the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5. And circulating the control operation process to generate the micro-bubble cold water again.

(b) When a user sets the water outlet type of the water heater to be a micro-bubble hot water type through the operating device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water conveying pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is supplied to the gas-liquid mixing device 5.

After the preset time, the control device controls the control valve 8 to be opened, controls the first water pump 7 to stop running, controls the heating device 6 to be started when the water flow detected by the first water flow detection device 9 is received for the second time, heats the water, and then conveys the hot water into the gas-liquid mixing device 5 to be mixed with the gas in the gas-liquid mixing device 5, so as to generate micro-bubble hot water.

When the water yield of the microbubble hot water reaches a preset water yield threshold value or the water outlet time of the microbubble hot water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at a corresponding rotating speed according to the received water flow detected by the second water flow detection device 10. And receiving the rotating speed fed back by the first water pump 7, and controlling the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5. And circulating the control operation process to generate micro-bubble hot water again.

Example two

Referring to fig. 4, the difference between the first embodiment and the second embodiment is mainly that the water heater 100 further includes a second water pump 12, and the second water pump 12 is disposed on the first water pipe 1. The second water pump 12 is used for driving the water in the first water conveying pipeline 1 to flow to the heating device 6.

The operation of the water heater 100 of the present embodiment is briefly described with reference to fig. 4:

(a) When the user sets the water outlet type of the water heater to be the microbubble cold water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water conveying pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is supplied to the gas-liquid mixing device 5.

After the preset time, the control device controls the control valve 8 to be opened, controls the first water pump 7 to stop running, controls the second water pump 12 to be started and run at the corresponding rotating speed, receives the real-time rotating speed fed back by the second water pump 12, controls the rotating speed of the second water pump 12 according to the real-time rotating speed, conveys cold water into the gas-liquid mixing device 5, and mixes the cold water with gas in the gas-liquid mixing device 5 to generate micro-bubble cold water.

When the water yield of the micro-bubble cold water reaches a preset water yield threshold value or the water yielding time of the micro-bubble cold water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at a corresponding rotating speed according to the received water flow detected by the second water flow detection device 10. And receiving the rotating speed fed back by the first water pump 7, and controlling the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5. And circulating the control operation process to generate the micro-bubble cold water again.

(b) When the user sets the water outlet type of the water heater to be the micro-bubble hot water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is supplied to the gas-liquid mixing device 5.

After the preset time, the control device controls the control valve 8 to be opened, controls the first water pump 7 to stop running, controls the second water pump 12 to be started and run at a corresponding rotating speed when the water flow detected by the first water flow detection device 9 is received for the second time, controls the heating device 6 to be started, heats water, and then conveys hot water into the gas-liquid mixing device 5 to be mixed with gas in the gas-liquid mixing device 5 to generate micro-bubble hot water.

In addition to the above differences, the structure of the water heater 100 and its components provided in this embodiment can be optimized with reference to the first embodiment, and will not be described in detail herein.

EXAMPLE III

Referring to fig. 5, the difference between the present embodiment and the second embodiment is mainly that the water heater 100 further includes a liquid level detection device 13, and the liquid level detection device 13 is disposed in the gas-liquid mixing device 5 and is used for detecting a water level corresponding to water contained in the gas-liquid mixing device 5.

As a possible implementation manner of this embodiment, the liquid level detection device 13 is a liquid level sensor or the like.

The operation of the water heater 100 of the present embodiment is briefly described with reference to fig. 5:

(a) When the user sets the water outlet type of the water heater to be the microbubble cold water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water conveying pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5.

When the liquid level detection device 13 detects that the current water level in the gas-liquid mixing device 5 is reduced to a preset water level, the control device controls the control valve 8 to be opened, controls the first water pump 7 to stop running, controls the second water pump 12 to be started and run at a corresponding rotating speed, receives the real-time rotating speed fed back by the second water pump 12, controls the rotating speed of the second water pump 12 according to the real-time rotating speed, conveys cold water into the gas-liquid mixing device 5, and mixes the cold water with gas in the gas-liquid mixing device 5 to generate micro-bubble cold water.

When the liquid level detection device 13 detects that the current water level in the gas-liquid mixing device 5 drops to the preset water level, the control device controls the control valve 8 to be opened, controls the first water pump 7 to stop running, controls the second water pump 12 to be started and run at the corresponding rotating speed when receiving the water flow detected by the first water flow detection device 9 for the second time, controls the heating device 6 to be started, heats water, and then conveys hot water into the gas-liquid mixing device 5 to be mixed with gas in the gas-liquid mixing device 5 to generate micro-bubble hot water.

When the water yield of the micro-bubble hot water reaches a preset water yield threshold value or the water outlet time of the micro-bubble hot water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at a corresponding rotating speed according to the received water flow detected by the second water flow detection device 10. And receiving the rotating speed fed back by the first water pump 7, and controlling the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5. And circulating the control operation process to generate micro-bubble hot water again.

In addition to the above differences, the structure of the water heater 100 and its components provided in this embodiment can be optimized with reference to the second embodiment, and will not be described in detail herein.

The embodiment of the application also provides a control method of the water heater, and the method can be used in any one of the water heaters provided by the embodiments to realize various different functions of the water heater and improve the intelligence of the water heater.

Example one

Referring to fig. 6, fig. 6 is a schematic flowchart of a control method of a water heater according to the present embodiment, and the control method of the water heater specifically includes steps S101 to S104.

S101, determining the current water outlet type of the water heater.

Illustratively, the water outlet types of the water heater include a microbubble cold water type, a microbubble hot water type, a normal cold water type, a normal hot water type, and the like.

As an implementation manner of this embodiment, as shown in fig. 7, step S101 may include sub-step S1011 and sub-step S1012.

And S1011, receiving water outlet type setting information sent by the operating device, wherein the water outlet type setting information is triggered by the user through setting operation executed based on the operating device.

Illustratively, the operating device includes, but is not limited to, a touch display or the like. The user can execute setting operation on the water outlet type of the water heater based on the operation device, and corresponding water outlet type setting information is triggered. The operating device sends the water outlet type setting information to the control device, so that the control device receives and acquires the water outlet type setting information.

And S1012, determining the current water outlet type of the water heater according to the water outlet type setting information.

And determining the current water outlet type of the water heater according to the received water outlet type setting information. For example, the current water outlet type of the water heater is determined to be a microbubble cold water type, a microbubble hot water type and the like.

S102, when first water flow information detected by the first water flow detection device is received, working states of the first water pump and the control valve are controlled according to the water outlet type, and therefore gas is conveyed into the gas-liquid mixing device.

The first water flow rate detection device, the first water pump and the control valve are the first water flow rate detection device 9, the first water pump 7 and the control valve 8 in fig. 1 to 5. When water flows in the first water pipe 1, the first water flow detection device 9 may detect corresponding water flow information. The water flow information includes, but is not limited to, information such as the size of the water flow. After the first water flow detection device 9 detects the corresponding water flow information, the water flow information is sent to the control device, so that the control device receives and acquires the water flow information. For convenience of description, the water flow information detected by the first water flow rate detection device 9 is hereinafter referred to as first water flow rate information. And after receiving the first water flow information, the control device controls the working states of the first water pump 7 and the control valve 8 according to the determined current water outlet type of the water heater.

For example, the first water pump 7 is controlled to start/run at a corresponding rotation speed/stop running, and the control valve 8 is controlled to open/close.

The gas is delivered to the gas-liquid mixing device 5 by controlling the working states of the first water pump 7 and the control valve 8.

And S103, when a first preset condition is reached, controlling the working states of the heating device, the first water pump and the control valve to convey cold water/hot water into the gas-liquid mixing device, wherein the mixed gas and the cold water/hot water are used for producing microbubble cold water or microbubble hot water.

Wherein the reaching of the first preset condition includes a time for delivering the gas into the gas-liquid mixing device 5 reaching a first preset time threshold. It should be noted that the first preset time threshold may be flexibly set according to practical situations, and is not particularly limited herein.

Or, in the case where the liquid level detection device 13 is provided in the gas-liquid mixing device 5, reaching the first preset condition includes the liquid level detection device 13 detecting that the current water level in the gas-liquid mixing device 5 falls to a preset water level. It should be noted that the preset water level may be flexibly set according to actual situations, and is not limited herein.

When the time for conveying the gas into the gas-liquid mixing device 5 reaches a first preset time threshold, or the liquid level detection device 13 detects that the current water level in the gas-liquid mixing device 5 drops to a preset water level, the working states of the heating device 6, the first water pump 7 and the control valve 8 are controlled, cold water or hot water is conveyed into the gas-liquid mixing device 5, and the gas and the cold water/hot water mixed in the gas-liquid mixing device 5 are used for producing microbubble cold water or microbubble hot water.

S104, when a second preset condition is reached, controlling the working states of the first water pump and the control valve according to received second water flow information detected by the second water flow detection device so as to convey gas into the gas-liquid mixing device again; and returns to perform step S103.

Wherein the second preset condition comprises at least one of: and the water yield of the microbubble cold water or the microbubble hot water reaches a preset water yield threshold, and the water outlet time of the microbubble cold water or the microbubble hot water reaches a second preset time threshold. The preset water yield threshold and the second preset time threshold may be flexibly set according to actual conditions, and are not specifically limited herein.

Since the gas content in the gas-liquid mixing device 5 is gradually reduced in the process of generating the microbubble cold water or the microbubble hot water, the microbubble generation effect is poor. In order to ensure the microbubble generation effect, when the water yield of the microbubble cold water or the microbubble hot water reaches a preset water yield threshold, or when the water yield time of the microbubble cold water or the microbubble hot water reaches a second preset time threshold, that is, when the microbubble generation effect is about to deteriorate, the working states of the first water pump 7 and the control valve 8 are controlled according to the received second water flow information detected by the second water flow detection device. The gas is delivered again to the gas-liquid mixing device 5 by controlling the operating states of the first water pump 7 and the control valve 8.

When the time for delivering the gas into the gas-liquid mixing device 5 again reaches the first preset time threshold, or the liquid level detection device 13 detects that the current water level in the gas-liquid mixing device 5 drops to the preset water level, the working states of the heating device 6, the first water pump 7 and the control valve 8 are controlled, cold water or hot water is delivered into the gas-liquid mixing device 5, and the gas and the cold water/hot water mixed in the gas-liquid mixing device 5 are used for producing microbubble cold water or microbubble hot water.

The above-mentioned step process of circulation, relapse multiple times intermittent type nature and carry gas to gas-liquid mixing device 5 in, avoid gas content too little in gas-liquid mixing device 5 to ensure the microbubble content in the microbubble water that produces, promoted the microbubble effect of microbubble water.

Example two

Referring to fig. 8, the difference between the first embodiment and the second embodiment is mainly that step S102 may include sub-step S1021, step S103 may include sub-step S1031, and step S104 may include sub-step S1041.

And S1021, if the water outlet type is the microbubble cold water type, controlling the first water pump to start and operate at a first rotating speed, and controlling the control valve to close.

When the current water outlet type of the water heater is determined to be the microbubble cold water type, after first water flow information detected by the first water flow detection device 9 is received, the first water pump 7 is started and operates at a first rotating speed, and the control valve 8 is controlled to be closed. After the control valve 8 is closed, water is not input into the gas-liquid mixing device 5 any more, and the first water pump 7 operates to pump out the water stored in the gas-liquid mixing device 5; then, the gas is supplied to the gas-liquid mixing device 5 through the gas supply line 2.

And S1031, when the first preset condition is reached, controlling the control valve to be opened, and controlling the first water pump to stop running.

And when the gas is conveyed into the gas-liquid mixing device 5 for a first preset time, the control valve 8 is controlled to be opened, and the first water pump 7 is controlled to stop running.

Or, under the condition that the liquid level detection device 13 is arranged in the gas-liquid mixing device 5, when the liquid level detection device 13 detects that the current water level in the gas-liquid mixing device 5 is reduced to the preset water level, the control valve 8 is controlled to be opened, and the first water pump 7 is controlled to stop running.

After the control valve 8 is opened, cold water is re-input into the gas-liquid mixing device 5 and mixed with the gas input into the gas-liquid mixing device 5 to generate micro-bubble cold water.

And S1041, when a second preset condition is reached, controlling the control valve to close, and controlling the first water pump to start and operate at a second rotating speed according to the second water flow information.

When the water yield of the micro-bubble cold water reaches a preset water yield threshold value or the water yielding time of the micro-bubble cold water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at the second rotating speed according to the received second water flow information detected by the second water flow detection device 10.

And the rotating speed fed back by the first water pump 7 is received, and the water yield is controlled according to the rotating speed fed back by the first water pump 7. When the first water pump 7 is operated, the control valve 8 is closed, and the gas is supplied to the gas-liquid mixing device 5 again. The above control operation is circulated to generate the microbubble cold water again.

As shown in fig. 9, fig. 9 shows a specific process of generating microbubble cold water by the water heater 100 according to the embodiment:

when the user sets the water outlet type of the water heater to be the microbubble cold water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water conveying pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is supplied to the gas-liquid mixing device 5.

After the preset time, the control device controls the control valve 8 to be opened, controls the first water pump 7 to stop running, and conveys cold water into the gas-liquid mixing device 5 to be mixed with gas in the gas-liquid mixing device 5 to generate micro-bubble cold water. For example, a microbubble generator is provided at a water consumption point (such as a faucet, a shower head, etc.) of the water heater 100, and the gas and the cold water mixed in the mixing tank 5 are acted by the microbubble generator to generate microbubble cold water.

As an embodiment of the present embodiment, when the second water pump 12 is disposed on the first water pipe 1, the method for controlling a water heater may further include: and when the first preset condition is reached, controlling the second water pump to start and operate at a third rotating speed.

After the gas is conveyed into the gas-liquid mixing device 5 for a first preset time period, or under the condition that the liquid level detection device 13 is arranged in the gas-liquid mixing device 5, when the liquid level detection device 13 detects that the current water level in the gas-liquid mixing device 5 is reduced to a preset water level, the control valve 8 is controlled to be opened, the first water pump 7 is controlled to stop running, the second water pump 12 is controlled to be started and run at a corresponding third rotating speed, the real-time rotating speed fed back by the second water pump 12 is received, the rotating speed of the second water pump 12 is controlled according to the real-time rotating speed, cold water is conveyed into the gas-liquid mixing device 5 and mixed with the gas in the gas-liquid mixing device 5, and micro-bubble cold water is generated.

As shown in fig. 10, fig. 10 is a specific process of the second water heater 100 according to the embodiment:

When the water yield of the microbubble cold water reaches a preset water yield threshold value or the water outlet time of the microbubble cold water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at a corresponding rotating speed according to the received water flow detected by the second water flow detection device 10. And receiving the rotating speed fed back by the first water pump 7, and controlling the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is supplied to the gas-liquid mixing device 5. And circulating the control operation process to generate the micro-bubble cold water again.

As shown in fig. 11, fig. 11 is a specific process of the embodiment of the triple water heater 100 to produce microbubble cold water:

when a user sets the water outlet type of the water heater to be a microbubble cold water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water conveying pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5.

When the water yield of the micro-bubble cold water reaches a preset water yield threshold value or the water yielding time of the micro-bubble cold water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at a corresponding rotating speed according to the received water flow detected by the second water flow detection device 10. And receiving the rotating speed fed back by the first water pump 7, and controlling the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5. And circulating the control operation process to generate micro-bubble cold water again.

Except for the above differences, the control method of the water purifier provided by the embodiment can be optimally designed with reference to the first embodiment, and is not described in detail herein.

EXAMPLE III

Referring to fig. 12, the difference between the first embodiment and the second embodiment is mainly that step S102 may include sub-step S1022, and step S103 may include sub-step S1032 and sub-step S1033.

And S1022, if the water outlet type is the micro-bubble hot water type, controlling the first water pump to start and operate at the first rotating speed, and controlling the control valve to close.

When the current water outlet type of the water heater is determined to be the microbubble hot water type, after first water flow information detected by the first water flow detection device 9 is received, the first water pump 7 is controlled to be started and operate at a first rotating speed, and the control valve 8 is controlled to be closed. After the control valve 8 is closed, water is not input into the gas-liquid mixing device 5 any more, and the first water pump 7 operates to pump out the water stored in the gas-liquid mixing device 5; then, the gas is supplied to the gas-liquid mixing device 5 through the gas supply line 2.

And S1032, when the first preset condition is met, controlling the control valve to be opened, and controlling the first water pump to stop running.

And S1033, controlling the heating device to start when the first water flow information detected by the first water flow detection device is received again.

When the first water flow information detected by the first water flow detection device 9 is received again, the heating device 6 is controlled to be started to heat the water flowing from the first water delivery pipeline 1, and the heated hot water is delivered to the gas-liquid mixing device 5 to be mixed with the gas input into the gas-liquid mixing device 5 due to the opening of the control valve 8, so that micro-bubble hot water is generated.

When the water yield of the microbubble hot water reaches a preset water yield threshold value or the water outlet time of the microbubble hot water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at the second rotating speed according to the received second water flow information detected by the second water flow detection device 10.

And the rotating speed fed back by the first water pump 7 is received, and the water yield is controlled according to the rotating speed fed back by the first water pump 7. When the first water pump 7 is operated, the control valve 8 is closed, and the gas is supplied to the gas-liquid mixing device 5 again. And circulating the control operation process to generate the micro-bubble hot water again.

As shown in fig. 13, fig. 13 illustrates a specific process of generating hot microbubble water by the water heater 100 according to an embodiment:

when a user sets the water outlet type of the water heater to be a micro-bubble hot water type through the operating device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water conveying pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5.

After the preset time, the control device controls the control valve 8 to be opened, controls the first water pump 7 to stop running, controls the heating device 6 to be started when the water flow detected by the first water flow detection device 9 is received for the second time, monitors the feedback information of the heating device 6, performs constant temperature control in real time according to the feedback information, heats water, and then conveys hot water into the gas-liquid mixing device 5 to be mixed with gas in the gas-liquid mixing device 5 to generate micro-bubble hot water.

As an implementation manner of this embodiment, when the second water pump 12 is disposed on the first water conveying pipeline 1, the step S1033 may include: and when the first water flow information detected by the first water flow detection device is received again, controlling the second water pump to start and operate at a third rotating speed, and controlling the heating device to start.

When the first water flow information detected by the first water flow detection device 9 is received again, the second water pump 12 is controlled to start and operate at the third rotation speed, the heating device 6 is controlled to start, and after water is heated, hot water is delivered into the gas-liquid mixing device 5 and mixed with gas in the gas-liquid mixing device 5, so that micro-bubble hot water is generated.

As shown in fig. 14, fig. 14 is a specific process of the second water heater 100 according to the embodiment:

when the user sets the water outlet type of the water heater to be the micro-bubble hot water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is delivered to the gas-liquid mixing device 5.

When the water yield of the micro-bubble hot water reaches a preset water yield threshold value or the water outlet time of the micro-bubble hot water reaches a preset time threshold value, the control device sends a corresponding control signal to the control valve 8 to control the control valve 8 to close. The control device sends a corresponding control signal to the first water pump 7 to control the first water pump 7 to start. And the control device controls the first water pump to operate at a corresponding rotating speed according to the received water flow detected by the second water flow detection device 10. And receiving the rotating speed fed back by the first water pump 7, and controlling the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is supplied to the gas-liquid mixing device 5. And circulating the control operation process to generate the micro-bubble hot water again.

As shown in fig. 15, fig. 15 shows a specific process of the embodiment three water heaters 100 to generate microbubble hot water:

when the user sets the water outlet type of the water heater to be the micro-bubble hot water type through the operation device, and the control device receives the water flow detected by the first water flow detection device 9, the control device sends a corresponding control signal to the control valve 8, controls the control valve 8 to be closed, and prohibits water from flowing into the gas-liquid mixing device 5 through the second water pipeline 2. The control device sends a corresponding control signal to the first water pump 7, controls the first water pump 7 to start and operate at a corresponding initial rotating speed, receives the rotating speed fed back by the first water pump 7, and controls the water yield according to the rotating speed fed back by the first water pump 7. The first water pump 7 is operated, the control valve 8 is closed, and gas is supplied to the gas-liquid mixing device 5.

Except for the above differences, the control method of the water purifier provided by the present embodiment can be optimally designed with reference to the first embodiment, and is not described in detail herein.

The above is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A water heater is characterized by comprising a first water conveying pipeline, a second water conveying pipeline, a third water conveying pipeline, an air supply pipeline, a heating device, a gas-liquid mixing device, a first water pump, a control valve, a first water flow detection device, a second water flow detection device, a flow direction control valve and a control device;

the water outlet end of the first water conveying pipeline is communicated with the heating device; the first water flow detection device is arranged on the first water conveying pipeline and used for detecting the water flow in the first water conveying pipeline;

the water inlet end of the second water conveying pipeline is communicated with the heating device; the water outlet end of the second water conveying pipeline is communicated with the gas-liquid mixing device so as to convey water into the gas-liquid mixing device; the control valve is arranged on the second water conveying pipeline and is used for controlling the flowing state of water in the second water conveying pipeline;

the gas supply pipeline is communicated with the gas-liquid mixing device and is used for conveying gas into the gas-liquid mixing device; the flow direction control valve is arranged on the gas supply pipeline;

2. The water heater as recited in claim 1 further comprising an operating means for a user to set a water outlet type of the water heater based on the operating means, the water outlet type of the water heater including a microbubble cold water type and a microbubble hot water type.

3. The water heater according to claim 2, wherein said control device is connected to said operating device, said first water flow rate detecting device and said second water flow rate detecting device, said control device is used for controlling the operating states of said heating device, said first water pump and said control valve according to the set water outlet type of said water heater and the water flow rates detected by said first water flow rate detecting device and said second water flow rate detecting device.

4. The water heater as claimed in claim 1, further comprising a second water pump disposed on the first water conveying pipeline for driving water in the first water conveying pipeline to flow to the heating device.

5. The water heater according to any one of claims 1 to 4, further comprising a liquid level detection device provided in the gas-liquid mixing device for detecting a level of water corresponding to water contained in the gas-liquid mixing device.

6. A control method of a water heater, characterized in that the water heater is a water heater according to any one of claims 1 to 5, the method comprising:

determining the current water outlet type of the water heater;

when first water flow information detected by a first water flow detection device is received, the working states of a first water pump and a control valve are controlled according to the water outlet type, so that gas is conveyed into a gas-liquid mixing device;

7. The method of claim 6, wherein the reaching of the first predetermined condition includes a time to deliver gas into the gas-liquid mixing device reaching a first predetermined time threshold.

8. The method as set forth in claim 6, wherein the water heater includes a liquid level detection device disposed within the gas-liquid mixing device, and the reaching of the first predetermined condition includes the liquid level detection device detecting a decrease in a current water level in the gas-liquid mixing device to a predetermined water level.

9. The method of claim 6, wherein the reaching of the second preset condition comprises at least one of:

10. The method of claim 6, wherein said determining a current water type of the water heater comprises:

receiving water outlet type setting information sent by an operating device, wherein the water outlet type setting information is triggered by a user through setting operation executed based on the operating device;

11. The method according to any one of claims 6 to 10, wherein the controlling the operating state of the first water pump and the control valve according to the effluent type comprises:

if the water outlet type is a microbubble cold water type, controlling the first water pump to start and operate at a first rotating speed, and controlling the control valve to close;

when reaching first preset condition, control heating device, first water pump with the operating condition of control valve includes:

and when the first preset condition is reached, controlling the control valve to be opened, and controlling the first water pump to stop running.

12. The method according to claim 11, wherein the controlling the operating states of the first water pump and the control valve according to the received second water flow rate information detected by the second water flow rate detection device when the second preset condition is reached comprises:

and when the second preset condition is reached, controlling the control valve to be closed, and controlling the first water pump to start and operate at a second rotating speed according to the second water flow information.

13. The method of claim 11, wherein the water heater includes a second water pump disposed on the first water line, the method further comprising:

14. The method according to any one of claims 6 to 10, wherein the controlling the operating state of the first water pump and the control valve according to the effluent type comprises:

if the water outlet type is a micro-bubble hot water type, controlling the first water pump to start and operate at a first rotating speed, and controlling the control valve to close;

when the first preset condition is met, controlling the control valve to be opened, and controlling the first water pump to stop running;

15. The method as claimed in claim 14, wherein the water heater includes a second water pump disposed on the first water pipeline, and the controlling the heating device to be activated when the first water flow information detected by the first water flow detecting device is received again includes:

and when first water flow information detected by the first water flow detection device is received again, controlling the second water pump to start and operate at a third rotating speed, and controlling the heating device to start.