Hybrid energy water heater control method and water heater

Abstract

The application discloses a kind of hybrid energy water heater control methods, comprising the following steps: whether there is water point to open water use is detected;The human body presence state in the surrounding area of target water point is detected;According to the detection result whether there is water point to open water use and the detection result of human body presence state in the surrounding area of target water point, heating mode is selected, and heating control step is executed.The hybrid energy water heater control method of the application, by detecting whether there is water point to open water use and the human body presence state in the surrounding area of target water point, according to the detection result whether there is water point to open water use and the detection result of human body presence state in the surrounding area of target water point, heating mode is selected, and heating control step is executed, according to the characteristics of water point targeted execution heating control is realized, and user experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of water-heating devices, and in particular relates to a control method for a hybrid energy water heater and the water heater. Background Art

[0002] At present, some water heaters use mixed energy for heating, such as configuring a gas heating part and an electric heating part in a gas water heater.

[0003] However, gas-fired water heating generally has the technical problem of slow heating. Different households have different water demands and the amount of water used is also different. For example, washing hands and vegetables requires less water, which leads to frequent activation of the gas water heater. In addition, the waiting time for hot water is long. Often, when the hot water is just started to be output, the user's water use may have ended, resulting in a poor user experience and a waste of gas.

[0004] In addition, the switching logic between gas heating and electric heating is manually implemented through the buttons on the display panel. The switching logic can switch back and forth between gas and electric heating; or one heating mode (gas) can be set as the default. The timing starts each time the button is switched, and the system switches back to the default heating mode after a certain period of time. Summary of the Invention

[0005] The present invention addresses the technical problem that existing hybrid energy water heaters require manual switching of different heating modes, which is inconvenient to operate. A hybrid energy water heater control method is proposed to solve the above problem.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A hybrid energy water heater control method comprises the following steps:

[0008] Check whether there is water point open for water use;

[0009] Detecting the presence of human bodies in the area surrounding the target water point;

[0010] The heating mode is selected according to the detection result of whether the water point is turned on for water use and the detection result of the presence of a human body in the surrounding area of ​​the target water point, and the heating control step is performed.

[0011] Furthermore, when a water point is turned on for water use and a human body is detected in the surrounding area of ​​the target water point, the burner is controlled to start heating;

[0012] When a water point is turned on for water use and no human body is detected in the surrounding area of ​​the target water point, the control starts the electric heating module for heating.

[0013] Furthermore, the method for detecting whether a water point is turned on for water use is:

[0014] Detect the water flow through the water heater, and when there is water flow, it is determined that there is a water point that starts water use; or,

[0015] The water use opening status of each water use point is detected respectively. When at least one of the water use points is turned on for water use, it is determined that the water use point has been turned on for water use.

[0016] Furthermore, in the method for detecting whether a water point has started water use, when the water flow rate flowing through the water heater is greater than the first flow rate, the heating control step is executed, otherwise the heating control step is not executed. The heating control step is to control the start of burner heating or control the start of electric heating module heating.

[0017] Furthermore, the detection method for detecting the presence of a human body in the surrounding area of ​​the target water use point is any one of active infrared detection, passive infrared detection, radar detection and laser detection.

[0018] Furthermore, all water use points are divided into at least large-flow water use points and small-flow water use points based on the empirical water flow, and the target water use point is the large-flow water use point.

[0019] Furthermore, in the step of controlling heating, when the current heating mode is heating by the electric heating module, the step of adjusting and judging the heating mode is also included:

[0020] It is determined whether the current water flow rate flowing through the water heater is greater than the second flow rate. If the current water flow rate is greater than the second flow rate, the burner is started for heating; otherwise, the burner is not started for heating.

[0021] Furthermore, in the step of controlling heating, when the heating mode initially determined is burner heating, the step of adjusting and determining the heating mode is also included:

[0022] Detect the water inlet temperature and water outlet temperature of the electric heating module respectively;

[0023] When the water inlet temperature of the electric heating module is greater than or equal to the first temperature value or when the water outlet temperature of the electric heating module is greater than or equal to the second temperature value, the current heating mode is maintained; otherwise, the electric heating modules are started at the same time.

[0024] Furthermore, when the burner and the electric heating module are both in the start-up state, it is continued to determine whether the current water flow rate is greater than the third flow rate. If the current water flow rate is greater than the third flow rate, the flow regulating module is controlled to reduce the water flow rate.

[0025] The present invention also provides a gas water heater, comprising a water heater body, the water heater body including a burner, a heat exchanger, an electric heating module, a flow regulating module, a water inlet pipe, and a water outlet pipe. The water heater body is further provided with a control device, the control device including a processor, a memory, and a control program for the gas water heater stored in the memory and executable by the processor, and characterized in that it also includes:

[0026] A human body detection module is provided at the target water use point, and is used to detect the presence of a human body in the surrounding area of ​​the target water use point and send the information to the control device, which controls heating according to the control method according to any one of claims 1 to 9.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are: the hybrid energy water heater control method of the present invention detects whether there is a water use point that turns on water and the presence of human bodies in the surrounding area of ​​the target water use point, selects a heating mode according to the detection results of whether there is a water use point that turns on water and the presence of human bodies in the surrounding area of ​​the target water use point, executes the heating control steps, realizes automatic execution of heating control, and improves user experience.

[0028] Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of a hybrid energy water heater proposed by the present invention;

[0031] Figure 2 This is a flow chart of an embodiment of the hybrid energy water heater control method proposed by the present invention. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Example 1

[0035] This embodiment proposes a hybrid energy water heater control method, wherein the gas water heater used in this embodiment is as follows: Figure 1 As shown, the gas water heater includes a burner 100, a heat exchanger 200, an electric heating module 300, a control device 400, a water inlet pipe 601, a water outlet pipe 602, and a fan (not shown). The control device 400 includes a processor, a memory, and a control program for the gas water heater stored in the memory and executable by the processor.

[0036] Burner 100 burns gas to heat the water flowing through heat exchanger 200, while electric heating module 300 utilizes the principle of electrical heating to provide auxiliary heating for the flowing water. Water inlet pipe 601 connects to the user's home water supply to draw in cold water, while water outlet pipe 602 connects to the user's home water terminal (hot water tap) to deliver hot water.

[0037] like Figure 2 As shown, the hybrid energy water heater control method of this embodiment includes the following steps:

[0038] Check whether there is water point open for water use;

[0039] The water heater of this solution is particularly aimed at instant heating water heaters. The heating is turned on only when there is a water point to turn on the water. It can meet people's water needs while greatly saving energy consumption.

[0040] Detecting the presence of human bodies in the area surrounding the target water point;

[0041] In this embodiment, a target water use point is set, and whether there is anyone in the surrounding area of ​​the target water use point is detected. Combined with the detection result of whether the water use point is turned on in the previous step, it is used to determine whether the target water use point or the non-target water use point is turned on.

[0042] The heating mode is selected according to the detection result of whether the water point is turned on for water use and the detection result of the presence of a human body in the surrounding area of ​​the target water point, and the heating control step is performed.

[0043] The basis for setting the target water use point is to estimate the water flow rate for the water use point, and to divide all water use points into at least high-flow water use points and low-flow water use points according to the empirical water flow rate.

[0044] When used for household hot water production, there are generally multiple water points. For example, three water points can include the kitchen faucet, bathroom faucet, and showerhead. Based on common water usage habits, the kitchen faucet is typically used for washing fruits and vegetables, dishes, and so can be categorized as a low-flow water point. Similarly, the bathroom faucet is typically used for washing and so can also be categorized as a low-flow water point. The showerhead is mostly used for bathing and can be categorized as a high-flow water point.

[0045] In this embodiment, high-flow water points can be designated as target water points. Water points other than the target water points are then designated as non-target water points, or low-flow water points. The reverse is also possible: low-flow water points can be designated as target water points, and water points other than the target water points are designated as non-target water points, or high-flow water points. High-flow water points and low-flow water points each have their own corresponding heating modes. After the first two steps of detection and judgment, the heating mode is determined based on the detection results, and the heating control step is executed.

[0046] In this embodiment, a large-flow water use point is used as a target water use point as an example for description.

[0047] The gas water heater in this embodiment offers both electric and gas heating modes. The optimal heating mode varies depending on water demand. For example, electric heating offers the advantage of faster heating, but its power is limited. Therefore, electric heating is preferred for anticipated low-flow water points. When electric heating can meet the demand, gas heating is unnecessary. Gas heating, however, offers the advantage of high heating capacity and is therefore preferred for anticipated high-flow water points.

[0048] Therefore, when a water point is turned on for water use and a human body is detected in the surrounding area of ​​the target water point, it is determined that the target water point is turned on. Since the current target water point has a large flow rate, the burner is controlled to start heating.

[0049] When a water point is turned on for water use and no human body is detected in the surrounding area of ​​the target water point, it is determined that the turned-on water point is not the target water point, that is, the water point with a large flow rate is not turned on, and the electric heating module is controlled to start heating to meet the water demand of a small flow rate.

[0050] Preferably, the method for detecting whether a water point is open for water use in this embodiment is:

[0051] The water flow rate flowing through the water heater is detected. When there is water flow, it is determined that there is a water point that starts water use.

[0052] Alternatively, the water usage status of each water point is detected separately. If at least one of the water points is turned on, it is determined that the water point has water usage enabled. When this detection and judgment method is used, each water point has a transmitter module, and the local end of the gas water heater is provided with a receiver module. Each water point communicates with the receiver module. After the gas water heater is installed in the user's home, the transmitter modules at different points are paired with the local receiver module to define a different flow pattern for each water point.

[0053] The communication method between the sending module and the receiving module can adopt but is not limited to power line carrier, Lora, BLE, Zegbee, Wifi, 433, 485 and the like.

[0054] The gas water heater control method of this embodiment estimates the water flow rate for each water use point and sets the water use mode. When it is detected that the target water use point has started water use, the heating is controlled according to the water use mode corresponding to the water use point, thereby realizing targeted execution of heating control according to actual water use demand and improving user experience.

[0055] In order to prevent the situation where the water flow is detected but the water flow is small due to reasons such as the water point not being closed tightly or the water pressure fluctuation in the pipeline network, and to avoid erroneous heating, in this embodiment, it is preferred that before controlling the heating, a heating control step is executed when the water flow passing through the water heater is greater than the first flow, otherwise the heating control step is not executed, and the heating control step is to control the start of the burner heating or the electric heating module heating.

[0056] In this embodiment, the method for detecting the presence of a human body in the area surrounding the target water point is preferably any one of active infrared detection, passive infrared detection, radar detection, and laser detection. Accordingly, an active infrared detection module, a passive infrared detection module, a radar detection module, and a laser detection module may be used. The detection module may be connected to the control module of the gas water heater via a wired connection, a wireless connection, or via a server.

[0057] Since the aforementioned steps only set the water use mode for each water point based on water use experience, in actual use, water will most likely be used according to the set water use mode, but it cannot completely rule out the possibility that each water point does not use the conventional water use mode. In order to improve the universality of this control method and meet the control requirements of various situations, the heating control step of this embodiment also includes adjusting the heating mode. That is, in the heating control step, when the current heating mode is electric heating module heating, the heating mode adjustment and judgment step is also included:

[0058] determining whether the current water flow rate is greater than the second flow rate, and if the current water flow rate is greater than the second flow rate, starting the burner to heat, otherwise, not starting the burner to heat.

[0059] The water flow rate reflects the user's water usage state. If the current water flow rate is greater than the second flow rate, it means that although the current water usage point is determined to be a small flow water usage point, the actual water flow rate is large. Therefore, when it is greater than the second flow rate, the burner is started to heat to meet the user's actual water demand, preventing the hot water production capacity from failing to meet the user's demand, and improving the user's experience.

[0060] The second flow rate is greater than the first flow rate.

[0061] In the heating step, when the initial determination of the heating mode is the burner heating, the method further comprises a step of adjusting the heating mode:

[0062] The inlet water temperature and the outlet water temperature of the electric heating module are detected respectively.

[0063] When the inlet water temperature of the electric heating module is greater than or equal to the first temperature value or when the outlet water temperature of the electric heating module is greater than or equal to the second temperature value, the current heating mode is maintained and the electric heating module is not started, otherwise, the electric heating module is started. This scheme can further save electric energy consumption by avoiding frequent starting of the electric heating module 300 when the user frequently opens the water.

[0064] When the water heater is started, there are two states. One is that the interval from the previous start time is short, and the temperature of the stored water in the water heater and the pipeline is high. At this time, by judging the inlet water temperature or the outlet water temperature of the electric heating module 300, either of which meets or approaches the user's demand, it is indicated that the temperature of the stored water in the pipeline can meet the user's demand, and there will be no cold water or undercooked water. Subsequent hot water production can be heated by the burner 100.

[0065] The other is that the interval from the previous start time of the water heater is long, and the temperature of the stored water in the water heater and the pipeline is low. When the starting condition of the electric heating module 300 is met, the electric heating module 300 needs to be started for auxiliary heating. At the same time, when the starting condition of the burner 100 is met, the burner 100 needs to be ignited for main heating.

[0066] When the inlet water temperature of the electric heating module is greater than or equal to the first temperature value, it means that the inlet water temperature of the electric heating module meets or approaches the user's demand, so the electric heating module does not need to be started, avoiding the increase of electric energy consumption, and therefore the electric heating module is not started.

[0067] When the water outlet temperature of the electric heating module is greater than or equal to the first temperature value, it means that the water temperature of the hot water output from the electric heating module meets or is close to the user's needs. There is no need to turn on the electric heating module to avoid increased energy consumption, so the electric heating module is not started.

[0068] In the step of controlling heating, if the step of controlling heating determines that the burner is started for heating, before controlling the burner to start, the step of determining whether the burner start condition is met is further included:

[0069] Determine whether the current water flow rate is greater than the second flow rate. If the current water flow rate is greater than the second flow rate, start the burner for heating. Otherwise, do not start the burner for heating to ensure the safety of gas heating and prevent the problem of water vaporization in the pipeline affecting system safety if the burner is started due to a small water flow rate.

[0070] When the burner and the electric heating module are both in the startup state, it reflects that the current water outlet temperature of the burner 100 is low. In order to quickly reach the set target heating temperature, when the burner and the electric heating module are both in the startup state, it is continued to determine whether the current water flow rate is greater than the third flow rate. If the current water flow rate is greater than the third flow rate, the flow regulation module is controlled to reduce the water flow rate.

[0071] Specifically, when the outlet water temperature of the burner 100 and the electric heating module 300 is low, if the water flow rate is high, heating the water to the target heating temperature requires high energy consumption and cannot be achieved in a short time. Therefore, in this embodiment, the water flow rate is reduced. With the water flow rate reduced, the water temperature can be quickly raised to the target heating temperature while maintaining the same energy consumption, thus reducing user waiting time.

[0072] There are many ways to adjust the water flow, which can be achieved by using a water servo or a water valve with adjustable opening. In this embodiment, water servo is used as an example for explanation.

[0073] The water servo, also known as a water servo valve, primarily consists of a valve body, a water flow rotor assembly, a sensor, a valve core assembly, and a motor (not shown). When the water point is turned on, water flows through, causing the magnetic water flow rotor to rotate. The sensor senses this and transmits current to the control device 400. The control device 400 quickly calculates the target heating temperature and controls the motor to drive the valve core assembly to adjust the water flow at the water outlet. The water servo valve is primarily used to coordinate with the adjustment of the gas proportional valve to achieve optimal combustion conditions, thereby achieving a constant temperature.

[0074] The basic operating logic of water servo:

[0075] 1. The water flow rotor assembly itself is a magnetic assembly. When water flows through, it impacts the water flow rotor and causes it to rotate.

[0076] 2. After the Hall sensor outside the valve body senses the change in the magnetic field, it generates a corresponding pulse current and sends it to the control device 400.

[0077] 3. The motor corresponds to the internal valve core assembly. The motor controls the opening and closing degree of the valve core assembly to control the size of the water flow.

[0078] Based on the operating principle of the water flow servo, the method of controlling the flow regulating module to reduce the water flow in this embodiment includes:

[0079] Get the water servo step number L;

[0080] Adjust the water servo step number to L-△L, where 0<△L<L.

[0081] The control device 400 calculates a target water flow rate according to the current flow rate and the target heating temperature. The target water flow rate corresponds to the adjustment step ΔL to achieve the adjustment of the water servo.

[0082] This embodiment also includes the step of acquiring a set target heating temperature, and determining a first temperature value and a second temperature value according to the target heating temperature.

[0083] The target heating temperature may be a bathing temperature set by the user. If not set by the user, the target heating temperature is a system default setting value.

[0084] As a preferred embodiment, since the water output from the electric heating module 300 is directly supplied to the water consumption point through the pipe, the outlet water temperature of the electric heating module 300 can reflect the target heating temperature.

[0085] In this embodiment: the first temperature value = the target heating temperature - ΔT1;

[0086] Second temperature value = target heating temperature.

[0087] ΔT1 is a suitable value matched according to the entire system, and its value range can be [1,5].

[0088] Example 2

[0089] This embodiment also proposes a gas water heater, such as Figure 1As shown, it includes a water heater body, which includes a burner 100, a heat exchanger 200, an electric heating module 300, a flow regulating module 700, a water inlet pipe 601 and a water outlet pipe 602. The water heater body is also provided with a control device 400, which includes a processor, a memory, and a control program of the gas water heater stored in the memory and executable by the processor. It also includes: a human body detection module 800, which is set at the target water use point and is used to detect the presence of a human body in the surrounding area of ​​the target water use point and send it to the control device 400. The control device 400 controls the heating according to the control method described in Example 1.

[0090] Burner 100 burns gas to heat the water flowing through heat exchanger 200, while electric heating module 300 utilizes the principle of electrical heating to electrically heat the flowing water. The water inlet pipe 601 connects to the user's home water supply to draw in cold water, while the water outlet pipe 602 connects to the user's home water terminal (hot water tap) to deliver hot water. The specific structural configuration of the gas water heater is not limited or detailed here.

[0091] In this embodiment, the electric heating module 300 is preferably arranged downstream of the burner 100. When part of the water in the burner 100 has not been heated to the target heating temperature, it flows out of the burner 100 along with the water flow. At this time, the electric heating module 300 can assist in continuing to heat it to reach the target heating temperature.

[0092] The gas water heater of this embodiment also includes a flow regulating module 700, which can be arranged in the water inlet pipe or the water outlet pipe of the gas water heater. Preferably, the flow regulating module 700 is arranged in the water inlet pipe 800. The flow regulating module 700 is electrically connected to the control module 400 and its opening is adjusted under the control of the control module 400 to achieve regulation of the water flow entering the water heater.

[0093] The flow regulating module 700 also has a flow acquisition function, that is, it can automatically convert the flow passing through it according to its own opening degree.

[0094] In this embodiment, the flow regulating module 700 is preferably disposed in the water inlet pipe 800 , because the incoming water is not heated and the water temperature is room temperature water, which will not damage the flow regulating module 700 and is conducive to extending the service life of the flow regulating module 700 .

[0095] The gas water heater of this embodiment further includes a first temperature detection module 901 and a second temperature detection module 902, wherein the first temperature detection module 901 is disposed at the water inlet end of the electric heating module 300 for detecting the inlet water temperature of the electric heating module 300. The second temperature detection module 902 is disposed at the water outlet end of the electric heating module 300 for detecting the outlet water temperature of the electric heating module 300.

[0096] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A hybrid energy water heater control method, characterized in that: The following steps are involved: Check whether there is water point open for water use; Detecting the presence of human bodies in the area surrounding the target water point; Selecting a heating mode based on the detection result of whether a water point is turned on for water use and the detection result of the presence of a human body in the surrounding area of ​​the target water point, and executing the heating control step; The heating modes include: burner heating and electric heating module heating; When a water point is turned on for water use and the presence of a human body is detected in the surrounding area of ​​the target water point, it is determined that the target water point is turned on, and the heating mode corresponding to the target water point is controlled for heating. When the target water point is a large-flow water point, the burner is selected for heating. When the target water point is a small-flow water point, the electric heating module is selected for heating.

2. The hybrid energy water heater control method according to claim 1, characterized in that: When a water point is open for water use and a human body is detected in the surrounding area of ​​the target water point, the burner is controlled to start heating; When a water point is turned on for water use and no human body is detected in the surrounding area of ​​the target water point, the control starts the electric heating module for heating.

3. The hybrid energy water heater control method according to claim 1, characterized in that: The method to detect whether there is a water point to open water is: Detecting the water flow through the water heater, and when there is water flow, it is determined that there is a water point that is open for water use; or, The water use opening status of each water use point is detected respectively. When at least one of the water use points is turned on for water use, it is determined that the water use point has been turned on for water use.

4. The hybrid energy water heater control method according to claim 3, characterized in that: In the method for detecting whether a water point has started water use, when the water flow rate flowing through the water heater is greater than a first flow rate, the heating control step is executed, otherwise the heating control step is not executed. The heating control step is to control the start of burner heating or control the start of electric heating module heating.

5. The hybrid energy water heater control method according to claim 1, characterized in that: The detection method for detecting the presence of a human body in the surrounding area of ​​the target water point is any one of active infrared detection, passive infrared detection, radar detection and laser detection.

6. The hybrid energy water heater control method according to any one of claims 1 to 5, characterized in that: According to the empirical water flow, all water use points are divided into at least large-flow water use points and small-flow water use points, and the target water use point is the large-flow water use point.

7. The hybrid energy water heater control method according to claim 2, characterized in that: In the step of controlling heating, when the current heating mode is heating by the electric heating module, the step of adjusting and judging the heating mode is also included: It is determined whether the current water flow rate flowing through the water heater is greater than the second flow rate. If the current water flow rate is greater than the second flow rate, the burner is started for heating; otherwise, the burner is not started for heating.

8. The hybrid energy water heater control method according to claim 2, characterized in that: In the step of controlling heating, when the heating mode initially determined is burner heating, the step of adjusting and determining the heating mode is also included: Detect the water inlet temperature and water outlet temperature of the electric heating module respectively; When the water inlet temperature of the electric heating module is greater than or equal to the first temperature value or when the water outlet temperature of the electric heating module is greater than or equal to the second temperature value, the current heating mode is maintained; otherwise, the electric heating modules are started at the same time.

9. The hybrid energy water heater control method according to claim 8, characterized in that: When the burner and the electric heating module are both in the start-up state, it is continued to determine whether the current water flow is greater than the third flow. If the current water flow is greater than the third flow, the flow regulating module is controlled to reduce the water flow.

10. A gas water heater comprising a water heater body, the water heater body comprising a burner, a heat exchanger, an electric heating module, a flow regulating module, a water inlet pipe, and a water outlet pipe; the water heater body further comprising a control device, the control device comprising a processor, a memory, and a gas water heater control program stored in the memory and executable by the processor, wherein: Also includes: A human body detection module is provided at the target water use point, and is used to detect the presence of a human body in the surrounding area of ​​the target water use point and send the information to the control device, which controls heating according to the control method according to any one of claims 1 to 9.

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