CN110870712A - Bathtub and control method thereof - Google Patents

Abstract

The invention discloses a bathtub and a control method thereof, which are communicated with a water outlet end of a water heater and comprise a controller, wherein the controller is in control connection with the water heater and is used for sending a control instruction to the water heater to control the water heater to work. The bathtub is in control connection with the water heater, the water heater is controlled to provide bath water with corresponding temperature and water temperature according to a user instruction, so that the user is facilitated, brand-new bath experience is brought to the user, the bathtub can be used for sterilizing the bath water to ensure that the user can carry out healthy bath, furthermore, the bathtub comprises a plurality of bath modules, the bathing process of the user can be guided, the bathing time of the user is prevented from being overlong, the user is prompted to add bath auxiliaries and the like in the bathing process of the user, and the user experience effect is enhanced.

Description

A bathtub and its control method

technical field

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

Background technique

At present, many people like to take a bath before going to bed every day to wash away the fatigue of the day, soothe the nerves, and enjoy the rare tranquility. Therefore, family spas are becoming more and more popular, and many families have installed bathtubs for bathing. There are many functions of taking a bath, not only for health, but also for human health. It can beautify the skin, soothe and calm nerves, relieve fatigue, detoxify and lose weight, warm the body, improve inflammation, relieve edema, and feel good, especially for the elderly and children, the benefits are more obvious. However, there are also many hidden dangers when taking a bath: 1. The bathtub stores water. During the bathing process, because the water temperature is suitable, bacteria are easy to breed. 2. The water temperature of the bath is not easy to control. People mistakenly believe that the higher the water temperature, the better the health. The body temperature of the human body is 40°C, so it is better to take a bath with warm water of 40°C to eliminate fatigue. If the water temperature is too high, it will consume more calories, but it will make people more uncomfortable; if the water temperature is too low, the blood vessels will constrict, and it is not easy to eliminate fatigue. Therefore, it is necessary to adjust the water temperature during the bath. 3. The bathing time needs to be controlled, because the bathing time is too long, it is easy to make people tired, and it is easy to cause heart ischemia and hypoxia. In severe cases, it can cause coronary artery spasm, thrombosis, and even induce arrhythmia and sudden death. Often many people, while enjoying the bath, forget the time or sleep in the bathtub. 4. Lack of knowledge about bathing, do not know the temperature of the water during the bathing process, what essential oils or traditional Chinese medicines to add, etc., can improve and regulate the functions of the human body.

The present invention has been made in view of this.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a bathtub that can be connected to a water heater for control, and controls the water heater to provide bath water of corresponding temperature and water temperature according to user instructions, thereby facilitating the user and bringing a new bathing experience.

In order to solve the above-mentioned technical problems, the basic conception of the technical scheme adopted in the present invention is:

A bathtub is communicated with the water outlet of the water heater, and includes a controller, which is connected to the water heater for control and is used for sending control instructions to the water heater to control the operation of the water heater.

In ordinary bathing, the temperature of the bath water is not easy to control. People mistakenly believe that the higher the water temperature, the better the health. The body temperature of the human body is 40 ℃, so it is better to take a bath with warm water of 40 ℃ to eliminate fatigue. If the water temperature is too high, it will consume more calories, but it will make people feel more uncomfortable. Therefore, it is necessary to adjust the water temperature during the bath. In the present invention, in view of these problems, an intelligent bathtub is provided, which communicates with the water outlet end of the water heater and can control the water heater without inputting control commands to the water heater end, which is convenient for users.

Preferably, the water heater is a gas water heater, the bathtub is only communicated with the gas water heater, and is not connected to a cold water pipe, and the gas water heater directly feeds water of the required temperature to the bathtub, which simplifies the control process and is conducive to providing accurate water temperature control. .

Preferably, the controller and the water heater are connected through a data cable or wirelessly;

Preferably, the bathtub is provided with a wireless communication module, and the controller is wirelessly connected to the water heater through the wireless communication module; more preferably, the wireless communication module is a lora wireless communication module.

In the above solution, the controller is wirelessly connected to the water heater, so there is no need to connect a data line.

Preferably, a water level detection module and/or a temperature sensor are provided in the bathtub, and the water level detection module and/or the temperature sensor are respectively connected to the controller for data, and the controller controls/ Adjust the working parameters of the water heater.

In the above solution, the hardware requirements of the bathtub for water heater control are provided by setting the water level detection module and/or the temperature sensor. It is beneficial for the bathtub to accurately control the temperature and water output of the water heater.

Preferably, the bathtub includes an instruction input device for receiving the bathing parameters input by the user, the instruction input part is connected to the controller, and the controller is used for controlling the operation of the water heater according to the bathing parameters sent by the instruction input part;

Wherein, the command input device is arranged on the bathtub, or the command input part is an intelligent terminal, and the intelligent terminal is wirelessly connected with the controller.

In the above solution, the user can directly send control commands to the bathtub through the smart terminal, and the bathtub then sends control commands to the water heater, or the smart terminal directly sends the target water temperature and water demand to the water heater, and then the bathtub adjusts the water heater according to the detected actual water level and actual water temperature. The working parameters include heating power, water flow and so on.

Another object of the present invention is to provide a control method for a bathtub, the bathtub is communicated with the water outlet of the water heater, the bathtub includes a controller, and the controller is connected to the water heater for control, and the control method includes: the controller sends a control to the water heater. Commands control the operation of the water heater.

Preferably, after the bathtub is turned on, a user's selection of bathing parameters or a user's selection of a bathing mode is received, and the controller controls the water heater to perform corresponding operations according to the user's selection result;

Preferably, the bathing parameters include two parameters of water temperature and water level;

Preferably, the bathtub includes multiple bathing modes, and different bathing modes correspond to different parameters of water temperature and water level.

Preferably, the controller controls the water heater to select corresponding heating power and water output according to the bathing parameters or bathing mode selected by the user, so as to ensure that the water heater passes water of corresponding temperature and water level into the bathtub. Among them, the water output has a corresponding relationship with the water level of the bathtub.

Preferably, a temperature sensor and a water level sensor are provided in the bathtub, and the controller controls the heating power and water flow rate of the water heater in real time according to the detection information of the temperature sensor and the water level sensor, so as to ensure that water of corresponding temperature and water level is fed into the bathtub.

Preferably, the water level sensor detects the water level in real time, and when it is detected that the water level in the bathtub reaches the target water level, the controller sends a signal to the water heater to stop water supply;

Preferably, the temperature sensor detects the temperature of the bathing water in the bathtub. When it is detected that the temperature of the bathing water is lower than the target water temperature, the controller controls the water heater to increase the heating power or reduce the water outlet flow. When it is detected that the temperature of the bathing water is higher than the target water temperature When the water temperature is low, control the water heater to reduce the heating power or increase the water flow.

Preferably, during the bathing process, the temperature sensor detects the temperature of the water in the bathtub in real time, and when the water temperature change is detected, the controller controls the water heater and the bathtub to work in coordination to ensure a constant water temperature;

Preferably, the controller controlling the water heater and the bathtub to work in coordination to ensure a constant water temperature includes: when the temperature sensor detects that the water level in the bathtub is lower than the target water temperature, the controller controls the water heater to add hot water to the bathtub to increase the temperature of the bath water, and simultaneously controls the drainage of the bathtub, To ensure that the water level in the tub is stable at the target water level.

Preferably, during the bathing process, the water level sensor detects the water level in the bathtub in real time, and the controller determines whether there is water splashing according to the detection result of the water level sensor. The water level in the tub is at the target water level.

After adopting the above-mentioned technical scheme, the present invention has the following beneficial effects compared with the prior art:

The invention provides an intelligent bathtub which is communicated with the water outlet of the water heater, and includes a controller, which is connected to the water heater for control and is used for sending control instructions to the water heater to control the operation of the water heater. The bathtub of the present invention is connected with the water heater control, and controls the water heater to provide bath water of corresponding temperature and water temperature according to user instructions, thereby facilitating the user and bringing a brand new bathing experience to the user. Healthy bathing. Further, the bathtub includes a variety of bathing modules, which can guide the user in the bathing process, prevent the user from taking a bath for too long, and prompt the user to add bathing aids and the like during the user's bathing process to enhance the user experience effect.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

Fig. 1 is the bathtub structure schematic diagram of the present invention;

Fig. 2 is the control flow schematic diagram of the bathtub of the present invention.

In the figure: 1. Controller; 2. Water level sensor; 3. Cold cathode pipe; 4. Transparent window; 5. Drainage outlet; 6. Bathtub.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention , but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

Referring to FIG. 1 , the present embodiment provides a bathtub 6 which is communicated with the water outlet of the water heater, and includes a controller 1 that is connected to the water heater and used to send control commands to the water heater to control the operation of the water heater.

In ordinary bathing, the temperature of the bath water is not easy to control. People mistakenly believe that the higher the water temperature, the better the health. The body temperature of the human body is 40 ℃, so it is better to take a bath with warm water of 40 ℃ to eliminate fatigue. If the water temperature is too high, it will consume more calories, but it will make people feel more uncomfortable. Therefore, it is necessary to adjust the water temperature during the bath. In the present invention, in view of these problems, an intelligent bathtub 6 is provided, which communicates with the water outlet of the water heater and can control the water heater without inputting control commands to the water heater, which is convenient for users.

Preferably, the water heater is a gas water heater, the bathtub 6 is only communicated with the gas water heater, and is not connected to a cold water pipe, and the gas water heater directly feeds water of the required temperature to the bathtub 6, which simplifies the control process and facilitates accurate control. water temperature.

Preferably, the controller 1 is connected to the water heater through a data cable or wireless connection;

Preferably, the bathtub 6 is provided with a wireless communication module, and the controller 1 is wirelessly connected to the water heater through the wireless communication module; more preferably, the wireless communication module is a lora wireless communication module.

In the above solution, the controller 1 is wirelessly connected to the water heater, so there is no need to connect a data line.

Preferably, the bathtub 6 is provided with a water level detection module and/or a temperature sensor, and the water level detection module and/or the temperature sensor are respectively connected with the controller 1 for data, and the controller 1 is based on the detection sent by the water level detection module and/or the temperature sensor. Information to control/regulate the working parameters of the water heater.

In the above solution, the hardware requirements of the bathtub 6 for water heater control are provided by arranging a water level detection module and/or a temperature sensor. It is beneficial for the bathtub 6 to accurately control the temperature and water output of the water heater.

Preferably, the bathtub 6 includes an instruction input device for receiving user input of bathing parameters, the instruction input part is connected to the controller 1, and the controller 1 is used to control the operation of the water heater according to the bathing parameters sent by the instruction input part;

Wherein, the command input device is arranged on the bathtub 6 , or the command input part is an intelligent terminal, and the intelligent terminal is wirelessly connected with the controller 1 .

In the above solution, the user can directly send a control command to the bathtub 6 through the smart terminal, and the bathtub 6 sends a control command to the water heater, or the smart terminal directly sends the target water temperature and water demand to the water heater, and then the bathtub 6 is based on the detected actual water level and actual water level. The water temperature adjusts the working parameters of the water heater, and the working parameters include heating power, water flow and so on.

Further, a solenoid valve is provided on the drain port 5 on the bathtub 6 , and the controller 1 controls the solenoid valve to open for drainage when drainage is required.

Preferably, the shown bathtub 6 is further provided with a water quality treatment module to safely process the bathing water in the bathtub 6 to ensure the health and safety of the user's bathing.

The water quality treatment module includes at least an ultraviolet sterilization device, and the ultraviolet sterilization device irradiates ultraviolet rays to the bath water in the bathtub 6 to sterilize the bath water; Quickly sterilize and ensure the normal use of the bathtub 6.

In the above solution, the bathtub 6 stores water, and during the bathing process, because the water temperature is suitable, bacteria are easy to breed. The current bathtub 6 does not have a sterilization device, so during the bathing process, a large amount of bacteria will grow in the water, especially for the elderly and children, long-term bathing in this way is harmful to health. In the present invention, the water quality treatment module can include an ultraviolet lamp, and the ultraviolet irradiation amount is large, which can quickly realize the sterilization in the bathtub 6, and ensure healthy bathing during the bathing process.

Preferably, the water quality treatment module further includes a residual chlorine treatment module and/or a water softening treatment module and/or an organic waste treatment module and/or a heavy metal treatment module.

In the above solution, the bathtub 6 further includes other water quality treatment modules, which can further treat the bathing water quality and ensure the user's safe bathing.

Because tap water itself contains rust, impurities, chlorine, pathogenic microorganisms and other harmful components, and the water quality of tap water varies greatly between regions. Health and safety issues caused by unclean bath water have long been a pain point for some users. Especially for some special user groups, with the improvement of living standards, their requirements for bathing water quality also tend to be higher. As tap water is affected by chemical composition and environmental pollution, bathing does tend to get dirtier. Bathing is the most important way for the human body to directly contact the water source, and the harmful substances in the water will directly harm the skin and hair. For example, residual chlorine and scale are destructive. Residual chlorine destroys the protein of the skin and causes skin aging; limescale forms calcium and magnesium soap on the skin surface, preventing skin absorption, and it is futile to use more cosmetics; Water-insoluble calcium and magnesium soap, it is like a colloidal, sticky substance, which is not easy to remove when it adheres to the skin. In this way, the dirt on the original skin has not been washed, and new dirt has been added. The viscous substances formed by these dirt and calcium and magnesium soap block the openings of the skin glands, which not only block the skin's excretion channel, form embolism, stimulate the skin, but also affect the normal metabolism of the skin, causing the skin to shrink and age prematurely. Therefore, we should pay attention to choosing soft water with low hardness when taking a bath.

Moreover, residual chlorine is often used in tap water, and a certain amount of residual chlorine can ensure that the water quality does not breed bacteria, etc., but after the residual chlorine exceeds the standard, it will irritate the eyes, nose, throat and upper respiratory tract, etc., causing acute pulmonary edema and pneumonia. When the concentration is high, the respiratory center can be paralyzed and "flash death" occurs. Long-term inhalation of low concentration of chlorine can cause chronic poisoning and lead to the speed of aging in the body. The main diseases are rhinitis, chronic bronchitis, emphysema, liver cirrhosis, atherosclerosis, and even cancer. Chlorine when added to water can cause dry, breakage, split ends, bleaching of your skin, peeling of layers, and an itchy allergy to psoriasis. Chlorine produces carcinogens such as chloroform when heated with organic humus in water.

Organic substances in water mainly refer to polycarboxylic acid compounds of humic acid and fulvic acid, pollutants of domestic sewage and industrial wastewater. Among them, the weak organic acid of the former multifunctional aromatic macromolecules accounts for more than 95% of the organic substances dissolved in water. Humic substances are the products of life activities such as aquatic organisms. Domestic sewage is mainly human excrement and garbage waste. The organic substances in various industrial wastewaters include animal and plant fibers, oils, sugars, dyes, organic acids, various organically synthesized industrial products, and organic raw materials. These organics contaminate water bodies and deteriorate water quality. The organic substances in the water body have a common feature, that is, to carry out biological oxidation and decomposition, the dissolved oxygen in the water needs to be consumed, which leads to the lack of oxygen in the water. At the same time, corruption and fermentation will occur, causing bacteria to grow, deteriorating water quality, and destroying water bodies.

To sum up, in order to achieve an excellent bathing environment, the water quality needs to be treated more carefully, and the use of ultraviolet sterilization is only one of the more important treatments.

Preferably, the organic waste treatment module and the residual chlorine treatment module include an adsorption device arranged on the bathtub 6, and the adsorption device adsorbs the residual chlorine and organic waste in the bath water; the heavy metal treatment module and the water softening treatment module are arranged in the bathtub 6. on the ion exchange device.

The water level detection module preferably adopts a pressure sensor to detect the water pressure at the bottom of the bathtub 6, thereby judging the water level of the bathtub 6;

Preferably, the above-mentioned modules are all sealed at the bottom of the bathtub 6, or in other words, the bottom of the bathtub 6 is provided with a mounting part, the water quality treatment module (cold cathode pipe 3), the water level sensor 2, the controller 1, etc., set The installation part is sealed and isolated from the bath water in the bathtub 6. Further, a transparent window 4 is provided on the bottom surface of the bathtub 6, and the cold-cathode tube 3 is sealed and installed at the bottom of the transparent window 4. The cold-cathode The ultraviolet rays emitted from the tube 3 are irradiated on the bath water through the transparent window 4 .

Embodiment 2

Referring to FIGS. 1 and 2 , this embodiment provides a method for controlling the bathtub 6 in the above-mentioned first embodiment. The bathtub 6 is communicated with the water outlet of the water heater, and the bathtub 6 includes a controller 1 , which controls the water heater. The control method includes: the controller 1 sends a control instruction to the water heater to control the operation of the water heater.

Preferably, after the bathtub 6 is turned on to receive the user's selection of bathing parameters or the user's selection of the bathing mode, the controller 1 controls the water heater to perform corresponding operations according to the user's selection result;

Preferably, the bathing parameters include two parameters of water temperature and water level;

Preferably, the bathtub 6 includes a plurality of bathing modes, and different bathing modes correspond to different parameters of water temperature and water level.

Preferably, the controller 1 controls the water heater to select the corresponding heating power and water output according to the bathing parameters or bathing mode selected by the user, so as to ensure that the water heater passes water of corresponding temperature and water level into the bathtub 6 . Wherein, the water output has a corresponding relationship with the water level of the bathtub 6 .

Preferably, a temperature sensor and a water level sensor 2 are provided in the bathtub 6, and the controller 1 controls the heating power and water flow rate of the water heater in real time according to the detection information of the temperature sensor and the water level sensor 2, so as to ensure that the corresponding temperature and water level are passed into the bathtub 6. water.

Preferably, the water level sensor 2 detects the water level in real time, and when it is detected that the water level in the bathtub 6 reaches the target water level, the controller 1 sends a signal to stop the water supply to the water heater;

Preferably, the temperature sensor detects the temperature of the bathing water in the bathtub 6. When the temperature of the bathing water is detected to be lower than the target water temperature, the controller 1 controls the water heater to increase the heating power or reduce the water outlet flow. When it is detected that the temperature of the bathing water is high At the target water temperature, control the water heater to reduce the heating power or increase the water flow. Wherein, the target water level is the water level parameter in the bathing parameters selected by the user, or the corresponding water level parameter in the bathing mode selected by the user. Similarly, the target water temperature is the water temperature parameter in the bathing parameters selected by the user, or the corresponding water temperature parameter in the bathing mode selected by the user.

Preferably, during the bathing process, the temperature sensor detects the temperature of the water in the bathtub 6 in real time, and when detecting a change in water temperature, the controller 1 controls the water heater and the bathtub 6 to coordinate work to ensure that the water temperature is constant;

Preferably, the controller 1 controls the water heater and the bathtub 6 to work in coordination to ensure the constant water temperature includes: when the temperature sensor detects that the water level in the bathtub 6 is lower than the target water temperature, the controller 1 controls the water heater to add hot water to the bathtub 6 to increase the temperature of the bath water, At the same time, the drainage of the bathtub 6 is controlled to ensure that the water level in the bathtub 6 is stable at the target water level.

Preferably, during the bathing process, the water level sensor 2 detects the water level in the bathtub 6 in real time, and the controller 1 determines whether there is water splashing out according to the detection result of the water level sensor 2. If the determination result is yes, it controls the water heater to flow into the bathtub 6. A corresponding amount of water keeps the water level in the tub 6 at the target water level.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (10)

1. A bathtub, characterized in that it communicates with the water outlet of the water heater, and comprises a controller, the controller is connected to the water heater for control, and is used for sending control commands to the water heater to control the operation of the water heater. 2. The bathtub according to claim 1, wherein the controller and the water heater are connected by a data cable or wirelessly; Preferably, the bathtub is provided with a wireless communication module, and the controller is wirelessly connected to the water heater through the wireless communication module; more preferably, the wireless communication module is a lora wireless communication module. 3. The bathtub according to claim 1 or 2, characterized in that, the bathtub comprises an instruction input device for receiving a user's input of bathing parameters, the instruction input part is connected with a controller, and the controller is used to input the part according to the instruction The sent bathing parameters control the work of the water heater, and the bathing parameters include water temperature parameters and water level parameters; Wherein, the command input device is arranged on the bathtub, or the command input part is an intelligent terminal, and the intelligent terminal is wirelessly connected with the controller. 4. The bathtub according to any one of claims 1-3, wherein a water level detection module and/or a temperature sensor are provided in the bathtub, and the water level detection module and/or the temperature sensor are respectively connected with the controller data, and control the The water heater controls/adjusts the working parameters of the water heater according to the detection information sent by the water level detection module and/or the temperature sensor. 5. A method for controlling a bathtub, characterized in that the bathtub is communicated with a water outlet of a water heater, the bathtub comprises a controller, and the controller is controlled and connected to the water heater, and the control method comprises: the controller sends a control instruction to the water heater Control the work of the water heater. 6. The control method according to claim 5, characterized in that, after the bathtub is turned on, a user selects a bathing parameter or a user selects a bathing mode, and the controller controls the water heater to perform corresponding operations according to the user's selection result; Preferably, the bathing parameters include two parameters of water temperature and water level; Preferably, the bathtub includes multiple bathing modes, and different bathing modes correspond to different parameters of water temperature and water level. 7. The control method according to claim 6, wherein the controller controls the water heater to select the corresponding heating power and water output according to the bathing parameters or bathing mode selected by the user, so as to ensure that the water heater passes the corresponding temperature and water into the bathtub. water level. 8. The control method according to claim 7, wherein a temperature sensor and a water level sensor are provided in the bathtub, and the controller controls the heating power and the water outlet flow of the water heater in real time according to the detection information of the temperature sensor and the water level sensor to ensure that Water of corresponding temperature and water level is passed into it; Preferably, the water level sensor detects the water level in real time, and when it is detected that the water level in the bathtub reaches the target water level, the controller sends a signal to the water heater to stop water supply; Preferably, the temperature sensor detects the temperature of the bathing water in the bathtub. When it is detected that the temperature of the bathing water is lower than the target water temperature, the controller controls the water heater to increase the heating power or reduce the water outlet flow. When it is detected that the temperature of the bathing water is higher than the target water temperature When the water temperature is low, control the water heater to reduce the heating power or increase the water flow. 9. The control method according to claim 8, wherein during the bathing process, the temperature sensor detects the temperature of the water in the bathtub in real time, and when detecting a change in the water temperature, the controller controls the water heater and the bathtub to coordinate work to ensure that the water temperature is constant; Preferably, the controller controlling the water heater and the bathtub to work in coordination to ensure a constant water temperature includes: when the temperature sensor detects that the water level in the bathtub is lower than the target water temperature, the controller controls the water heater to add hot water to the bathtub to increase the temperature of the bath water, and simultaneously controls the drainage of the bathtub, To ensure that the water level in the tub is stable at the target water level. 10. The control method according to claim 8 or 9, wherein during the bathing process, the water level sensor detects the water level in the bathtub in real time, and the controller judges whether there is water splashing out according to the detection result of the water level sensor, if the judgment result is If yes, control the water heater to pass a corresponding amount of water into the bathtub so that the water level in the bathtub is at the target water level.

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