Anti-scald electric heater, control method and device

Abstract

This invention relates to the field of heating equipment technology, and discloses an anti-scalding electric heater, a control method, and a device. The anti-scalding electric heater of this invention can accurately and promptly detect human proximity signals and take timely preventative measures to prevent scalding accidents. Furthermore, it will not cause false triggering, will not cause repeated on / off switching of the heater, and will not affect the normal use of the heater. The anti-scalding electric heater of this invention includes: a main body, a radar detection device, and a control unit. The main body has an air outlet, and a heating element is disposed within the main body. The radar detection device is disposed on the main body and is used to detect human signals; the detection range of the radar detection device covers the air outlet. The control unit is disposed on the main body, and the signal output terminal of the radar detection device is electrically connected to the signal input terminal of the control unit. The signal output terminal of the control unit is electrically connected to the heating element and controls the on / off switching of the heating element.

Description

Technical Field

[0001] This invention relates to the field of heating equipment technology, specifically to an anti-scalding electric heater, control method, and device. Background Technology

[0002] Electric heaters are common household appliances, and they come in various types, mainly including oil-filled radiators and convection heaters. Among them, convection heaters have a built-in heating element that conducts heat through micro-air circulation, enabling more even heating of the room and providing better comfort. Moreover, with upgrades and improvements in the heating element materials, the heating effect of this type of heater has been greatly improved.

[0003] Convection heaters have air outlets from which hot air is blown into the room. The temperature at the air outlets is usually quite high, and if a person accidentally touches the air outlet, a burn accident can easily occur. Summary of the Invention

[0004] In view of this, the present invention provides an anti-scalding electric heater, a control method and a device to solve the problems of existing electric heaters that use infrared detection for anti-scalding, which have low accuracy, are prone to false triggering, and affect the normal use and lifespan of the electric heater.

[0005] In a first aspect, the present invention provides an anti-scalding electric heater, comprising:

[0006] The main body has an air outlet, and a heating element is installed inside the main body;

[0007] A radar detection device is installed on the main body. The radar detection device is used to detect human body signals, and the detection range of the radar detection device covers the air outlet.

[0008] A control unit is disposed on the main body. The signal output terminal of the radar detection device is electrically connected to the signal input terminal of the control unit. The signal output terminal of the control unit is electrically connected to the heating element and controls the on / off state of the heating element.

[0009] Beneficial effects: The anti-scalding electric heater of the present invention is equipped with a radar detection device on its main body. The radar detection device is used to detect human body signals, and its detection range covers the air outlet. By setting up the radar detection device, it can accurately identify whether a human body has entered near the air outlet. When a human body signal is detected, protective measures can be taken in time to prevent burns. This anti-scalding detection method has high accuracy, is not prone to false triggering, does not cause repeated on / off switching of the electric heater, does not affect the normal use of the electric heater, and does not affect the lifespan of the electric heater.

[0010] In one optional implementation, the radar detection device is a millimeter-wave radar detection device.

[0011] Beneficial effects: The anti-scalding electric heater of the present invention uses a millimeter-wave radar detection device to detect human body signals. This radar detection device has a high operating frequency, high detection accuracy, and strong resolution. It can resist various electromagnetic interferences such as electronic interference, clutter interference, and multipath reflection interference. Moreover, the millimeter-wave radar detection device is small in size, easy to lay out and set up, and does not occupy too much installation space, which is conducive to the compact design of electric heater products.

[0012] In one alternative implementation, the radar detection device operates at a frequency of 24 GHz.

[0013] Beneficial effects: The anti-scalding electric heater of the present invention has a radar detection device with a working frequency of 24GHz, which is relatively high. Therefore, the detection accuracy is high, and it can accurately detect human body signals, ensuring the anti-scalding function of the electric heater. It has good reliability and meets user needs.

[0014] In one optional embodiment, the main body is further provided with a handle, which is located near the air outlet, and the radar detection device is disposed inside the handle.

[0015] Beneficial effects: In the anti-scalding electric heater of the present invention, the radar detection device is set inside the handle, which is located near the air outlet. The handle has ample space, and setting the radar detection device inside the handle does not affect the arrangement of other structures. Moreover, setting the radar detection device in the handle position can fully cover the air outlet and ensure detection accuracy.

[0016] In one optional embodiment, the main body is further provided with a display panel, which is electrically connected to the control unit, and the display panel is provided with a human body detection mode indicator and a human body protection mode indicator.

[0017] Beneficial effects: The anti-scalding electric heater of the present invention can intuitively display the anti-scalding function to the user by setting human body detection mode and human body protection mode indicators on the display panel, making it convenient for the user to select and operate. Moreover, the user can easily view the current working status of the electric heater through the display panel, which improves the user experience and meets the user's needs.

[0018] In one optional implementation, the detection range includes a mandatory detection area and an effective detection area.

[0019] Beneficial effects: The anti-scalding electric heater of the present invention further divides the detection range into a forced detection zone and an effective detection zone to carry out different control processes accordingly. This not only improves the accuracy of human body signal detection and ensures the reliability of the anti-scalding function of the electric heater, but also maximizes the normal operation of the heating function of the electric heater, prevents repeated on / off switching of the electric heater, ensures the service life of the electric heater, makes the product more intelligent, and enhances the user experience.

[0020] In one optional implementation, the forced detection zone is the area within (0, 20] cm vertically upward from the air outlet and (0, 2] cm horizontally outward from the air outlet.

[0021] The effective detection area is the range within (20, 40] cm vertically upward from the air outlet and (0, 2] cm horizontally outward from the air outlet.

[0022] Beneficial effects: The anti-scalding electric heater of the present invention, with its division of the forced detection zone and the effective detection zone, can improve the detection accuracy in different areas within the detection range and improve the reliability of the anti-scalding function.

[0023] Secondly, the present invention also provides a control method for the above-mentioned anti-scalding electric heater, comprising:

[0024] Heating function detected as enabled;

[0025] Human detection mode detected;

[0026] If a human signal is detected within the detection range, the heating function is turned off, and human detection continues until no human signal is detected within the detection range within time T, at which point the heating function is activated.

[0027] If no human signal is detected within the detection range, human detection continues.

[0028] Beneficial effects: The control method of the present invention has high detection accuracy. When a human body signal is detected, protective measures can be taken in time to prevent burn accidents. This anti-scalding detection method is not prone to false triggering, will not cause repeated on and off of the electric heater, will not affect the normal use of the electric heater, and will not affect the service life of the electric heater.

[0029] In one optional implementation, the step of turning off the heating function and continuing the human body detection if a human signal is detected within the detection range, until no human signal is detected within the detection range within time T, and then activating the heating function, includes:

[0030] If the human body signal falls within the mandatory detection zone, the heating function will be turned off.

[0031] Determine the speed of human movement;

[0032] If the human body's movement speed is greater than the preset movement speed v0, then the detection frequency of the radar detection device is increased, and the transmission power of the radar detection device is increased.

[0033] Continue the human body detection until no human body signal is detected within the detection range within time T, then activate the heating function.

[0034] Beneficial effects: The control method of the present invention, if a human body signal is detected in the forced detection zone, needs to further determine the human body's movement speed. If the human body's movement speed is fast, the detection frequency of the radar detection device is increased, and the transmission power of the radar detection device is increased to perform high-speed human body recognition. That is, it has a more accurate capture efficiency for fast-moving human bodies, and can accurately identify human bodies even when they pass through the detection zone at high speed. The detection accuracy is very high, avoiding missed detections, ensuring the anti-scalding function, and guaranteeing the safety of users.

[0035] In one alternative implementation, if the human body's movement speed is less than or equal to a preset movement speed v0, other signals in the environment are ignored, and the human body signal is captured in a concentrated manner.

[0036] Beneficial effects: When further judging the speed of human movement, if the human movement speed is slow, the radar may not be able to detect the human body and mistakenly assume that the human body signal has disappeared, leading to misjudgment. Therefore, if the human body movement speed is slow, the control radar detection device ignores other signals in the environment that are significantly different from the human body signal, concentrates computing power to capture the human body signal, realizes the capture of minute human movement signals, and feeds them back to the main control chip in real time, reducing misjudgment. In other words, even if the human body is stationary or moving slowly, it can still be identified normally, with very high detection accuracy, avoiding missed detection, ensuring the anti-scalding function, and guaranteeing the safety of users.

[0037] In one optional implementation, the step of turning off the heating function and continuing the human body detection if a human signal is detected within the detection range, until no human signal is detected within the detection range within time T, and then activating the heating function, includes:

[0038] If the human body signal falls within the effective detection zone, the heating function will be turned off.

[0039] Continue the human body detection until no human body signal is detected within the detection range within time T, then activate the heating function.

[0040] Beneficial effects: The control method of the present invention directly shuts off the heating function if a human body signal is detected in the effective detection area, quickly provides anti-scalding protection, improves the system's response speed, and provides timely anti-scalding protection for the human body to ensure personal safety.

[0041] In one optional implementation, the step of turning off the heating function and continuing the human body detection until no human body signal is detected within the detection range for a time period T, and then starting the heating function, further includes, after turning off the heating function: starting the high-speed mode of the fan in the anti-scalding electric heater for a time period t.

[0042] Beneficial effects: The control method of this invention, upon detecting a human signal, shuts off the heating function and activates the fan at high speed, using strong airflow to rapidly cool the electric heater (especially the air outlet), for a duration of t, after which the original fan speed can be restored. This method enables the heater body and heating element to cool down faster, improving the anti-scalding effect and ensuring user safety.

[0043] Thirdly, the present invention also provides a control device for an anti-scalding electric heater as described above, characterized in that it comprises:

[0044] The heating function detection module is used to detect whether the heating function is turned on.

[0045] The human body detection module is used to detect whether the human body detection function is enabled.

[0046] Human signal detection module, used to detect human signals;

[0047] The control unit is configured to, if the human signal detection module detects a human signal within the detection range, shut down the heating function of the heating module and continue human detection until the human signal detection module does not detect the human signal within the detection range within time T, and then start the heating function; if the human signal detection module does not detect the human signal within the detection range, then continue human detection.

[0048] Beneficial effects: The control device of the present invention has high detection accuracy. When a human body signal is detected, it can take protective measures in time to prevent burns. This control device is not prone to false triggering, will not cause repeated on / off switching of the electric heater, will not affect the normal use of the electric heater, and will not affect the service life of the electric heater. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1 This is a front view of the anti-scalding electric heater of the present invention;

[0051] Figure 2 This is a top view of the anti-scalding electric heater of the present invention;

[0052] Figure 3 This is a flowchart of the anti-scalding electric heater control method of the present invention;

[0053] Figure 4 This is a detailed flowchart of the anti-scalding electric heater control method of the present invention.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Main body; 101. Air outlet; 102. Handle; 103. Display panel; 104. Button area; 105. Scroll wheel;

[0056] 2. Radar detection device;

[0057] 3. Detection range; 301. Mandatory detection area; 302. Valid detection area. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] On the market, the anti-scalding technology of electric heaters uses infrared detection to detect the human body. When a human body is detected, the heater stops working to reduce the risk of burns. However, because infrared detection devices have a large coverage area and low detection accuracy, they are prone to false triggering, causing the heater to frequently switch on and off. This affects the normal heating function of the heater and also shortens its lifespan, failing to meet user needs.

[0060] The following is combined Figures 1 to 2 This describes an embodiment of the anti-scalding electric heater of the present invention.

[0061] According to an embodiment of the present invention, in one aspect, an anti-scalding electric heater is provided, comprising: a body 1, a radar detection device 2, and a control unit, wherein the body 1 has an air outlet 101, and a heating element is disposed inside the body 1; the radar detection device 2 is disposed on the body 1, and the radar detection device 2 is used to detect human body signals, and the detection range 3 of the radar detection device 2 covers the air outlet 101; the control unit is disposed on the body 1, the signal output terminal of the radar detection device 2 is electrically connected to the signal input terminal of the control unit, and the signal output terminal of the control unit is electrically connected to the heating element and controls the on / off state of the heating element.

[0062] This type of anti-scalding electric heater can accurately identify whether a human body (such as a hand) has entered near the air vent 101 by setting up a radar detection device 2. When a human body signal is detected, protective measures can be taken in time to prevent burn accidents. This anti-scalding detection method is highly accurate, not prone to false triggering, and will not cause the electric heater to be repeatedly turned on and off, thus not affecting the normal use of the electric heater or its service life.

[0063] Specifically, the main body 1 is the outer shell of the anti-scalding electric heater in this embodiment, and serves as the load-bearing structure for other structural components of the anti-scalding electric heater. The main body 1 should have high structural strength to support the other structural components of the anti-scalding electric heater. The main body 1 is made of a high-temperature resistant and high-strength material. The main body 1 has an internal cavity, in which a heating element is installed. When the heating element is powered on, it can generate high heat. Typically, the heating element can be a PTC (Positive Temperature Coefficient) heating element or other commonly used heating elements in existing electric heaters. This embodiment does not impose any restrictions on this.

[0064] The main body 1 is provided with an air outlet 101. The size and shape of the air outlet 101 should be selected and set according to the size of the main body 1 and the internal air duct structure. The heat emitted by the heating element is blown into the room through the air outlet 101 to raise the room temperature and realize the heating function of the electric heater. Since the heating function and related structure of the anti-scalding electric heater in this embodiment are the same as those in the prior art, they will not be described in detail here.

[0065] Since the heat emitted by the heating element is blown into the room through the air outlet 101, the temperature at the air outlet 101 is relatively high. If a person (such as a hand) accidentally touches the air outlet 101, a burn accident can easily occur. The anti-scalding electric heater of this embodiment has an anti-scalding function, which can effectively avoid the occurrence of burn accidents and ensure the safety of users.

[0066] In this embodiment, the air outlet 101 is located on the upper surface of the main body 1, and the heat emitted by the heating element blows upwards into the room. This type of electric heater is also called a baseboard heater, and its shape is that of a baseboard. This heating device organically combines the baseboard and the electric heater, without taking up too much space, and also has a certain decorative effect, while achieving the purpose of heating. This type of electric heater uses the principle of heat circulation to heat and dissipate heat along the perimeter of the room, allowing hot air to circulate from bottom to top, making the room temperature uniform, with small temperature differences between different locations in the room, good heating effect, and simple installation, low failure rate, and easy disassembly and transportation.

[0067] In addition, the main body 1 is also provided with handles 102. Usually, there are two handles 102, and the two handles 102 are set at a distance from each other to facilitate hand gripping, so as to move or adjust the position of the electric heater. Of course, the shape of the handles 102 should conform to the ergonomic design to improve the comfort of hand gripping.

[0068] In this embodiment, the handle 102 is positioned near the air outlet 101 for easy gripping and moving of the electric heater, etc.

[0069] A display panel 103 is also provided on the main body 1. The display panel 103 is electrically connected to the control unit and can display information such as the working status of the electric heater for the user's convenience. In this embodiment, the display panel 103 is located on one side of the handle 102. The display panel 103 is preferably an LCD screen, which has high clarity, is not easily damaged, and has a long service life.

[0070] In this embodiment, the main body 1 is also provided with a button area 104, which has a variety of function buttons, including: heating button, heating level button, fan speed level button, anti-scalding function button, etc. When the user presses a button, the electric heater will perform the corresponding function.

[0071] Of course, in other embodiments, the button area 104 may not be provided, and the display panel 103 may be configured as an interactive control panel. Touch buttons with corresponding functions may be provided on the display panel 103, and the user can select various functions of the electric heater by operating the interactive control panel.

[0072] In this embodiment, the display panel 103 is provided with a human body detection mode indicator and a human body protection mode indicator.

[0073] When the human body detection mode indicator is lit, it means that the anti-scalding electric heater is in anti-scalding mode and the radar detection device 2 is detecting human body signals in real time; when the human body detection mode indicator is not lit, it means that the anti-scalding electric heater is not in anti-scalding mode and the radar detection device 2 is not detecting human body signals.

[0074] When the human body protection mode indicator is lit, it means that the anti-scalding electric heater is in anti-scalding mode and the radar detection device 2 has detected a human body signal within the detection range 3, disconnecting the heating element circuit and pausing the heating function; when the human body protection mode indicator is not lit (if the human body detection mode indicator is lit at this time), it means that the anti-scalding electric heater is in anti-scalding mode and the radar detection device 2 has not detected a human body signal within the detection range 3.

[0075] To facilitate the movement of the electric heater, casters 105 can be installed on the bottom surface of the main body 1. Users can move the electric heater by pushing or pulling, increasing user convenience. The number of casters 105 can be four or six, depending on the size and weight of the electric heater.

[0076] Furthermore, radar detection device 2 is a millimeter-wave radar detection device.

[0077] This type of radar detection device operates at a high frequency, has high detection accuracy, and strong resolution. It is resistant to various electromagnetic interferences, including electronic interference, clutter interference, and multipath reflection interference. Furthermore, the millimeter-wave radar detection device is small in size, easy to install, and does not occupy excessive installation space, which is beneficial for the compact design of electric heater products. In this embodiment, the radar detection device 2 preferably uses a millimeter-wave radar detection board. The signal detected by the radar detection device 2 is fed back to the control unit.

[0078] Furthermore, the radar detection device 2 operates at a frequency of 24 GHz.

[0079] In this embodiment, the radar detection device 2 operates at a frequency of 24 GHz. This frequency is suitable for electric heaters and can detect human body signals more accurately, effectively preventing missed detections and false detections.

[0080] Furthermore, the radar detection device 2 is installed inside the handle 102.

[0081] The handle 102 has ample internal space, and the installation of the radar detection device 2 inside the handle 102 will not affect the layout of other structures. Moreover, since the handle 102 is located close to the air outlet 101, the radar detection device 2 at the handle 102 position can fully cover the air outlet 101, ensuring that the detection range covers the air outlet 101 that is easily touched by human hands and where burn accidents may occur, while also ensuring detection accuracy.

[0082] To further improve detection accuracy and increase the response speed of the system's anti-scalding protection, the detection range 3 is further divided into a forced detection zone 301 and an effective detection zone 302.

[0083] It should be noted that, due to the high temperature of the air outlet 101, and to prevent burns to the human body, the division of the forced detection zone 301 and the effective detection zone 302 is based on the position of the air outlet 101. The size of the forced detection zone 301 and the effective detection zone 302 can be selected and set according to the size of the main body 1, the size of the air outlet 101, etc. Moreover, compared to the effective detection zone 302, the forced detection zone 301 is located closer to the air outlet 101.

[0084] In this embodiment, the air outlet 101 is a rectangular air outlet with a length of 38cm and a width of 13cm.

[0085] In this embodiment, the forced detection zone 301 is the area within (0, 20] cm vertically upward from the air outlet 101 and within (0, 2] cm horizontally outward from the air outlet 101; the effective detection zone 302 is the area within (20, 40] cm vertically upward from the air outlet 101 and within (0, 2] cm horizontally outward from the air outlet 101. It should be noted that "horizontal outward from the air outlet 101" refers to... Figure 2 The four directions of China, North Korea, and China are horizontally outward: up, down, left, and right.

[0086] In this embodiment, the success rate of the forced detection area 301 under various experimental conditions (such as a hand quickly passing by or a hand slowly approaching) should reach more than 95%, and the success rate of the effective detection area should reach more than 50%.

[0087] Furthermore, in this embodiment, the control unit of the anti-scalding electric heater is the core of the entire electric heater's control. The control unit is used to receive detection signals, command signals, and issue execution commands. In this embodiment, the control unit is the main control chip.

[0088] like Figure 3 As shown, this embodiment also provides a control method for the above-mentioned anti-scalding electric heater, including:

[0089] Step S01: Heating function detected as enabled;

[0090] In this step, when the user needs to use the electric heater for warmth, they can operate the heating button in the button area 104 to activate the heater's heating function. The user can also operate the heating level button and fan speed button in the button area 104 to select the appropriate heating and fan speed levels. After the user activates the heating function, the control unit will detect that the heating function is on.

[0091] When the heating function of the electric heater is activated, the heating element inside the heater is powered on and begins to heat up. The heat from the heating element is blown into the room through the air outlet 101, so that the room temperature is raised evenly.

[0092] Step S02: Human detection mode is detected to be enabled;

[0093] In this step, when the user needs to use the anti-scalding function of the electric heater, they can operate the anti-scalding function key in the button area 104. The control unit can then detect that the human body detection mode is activated. At this time, the human body detection mode indicator on the display panel 103 lights up, the heater enters the anti-scalding function mode, and the radar detection device 2 begins to detect human body signals within the detection range 3.

[0094] Step S03: If a human signal is detected within the detection range 3, the heating function is turned off and human detection continues until no human signal is detected within the detection range 3 within time T, at which point the heating function is turned on.

[0095] In this step, if the radar detection device 2 detects a human signal within the detection range 3, indicating that the human body is relatively close to the air outlet 101, the heating function is turned off, that is, the circuit of the heating element is disconnected, the power is cut off, and the heating is stopped, so that the main body 1 and the air outlet 101 are cooled down to prevent burns caused by human contact and to ensure the safety of the user.

[0096] Afterwards, the radar detection device 2 continues to monitor human body signals. If no human body signal is detected within the detection range 3 within time T, the heating function is restarted, even if the heating element is powered on again. In this embodiment, T = 3s.

[0097] Step S04: If no human signal is detected within the detection range 3, continue with human detection.

[0098] In this step, if the radar detection device 2 does not detect a human signal within the detection range 3 while the electric heater is performing its heating function, it will continue to perform human detection and provide real-time anti-scalding protection to ensure the user's safety.

[0099] Human body signal detection is performed by radar detection device 2. The detection accuracy is high and the detection is good. When a human body signal is detected, protective measures can be taken in time to prevent burn accidents. This anti-scalding detection method is not prone to false triggering, will not cause repeated on and off of the electric heater, will not affect the normal use of the electric heater, and will not affect the lifespan of the electric heater.

[0100] like Figure 4 As shown, the detailed steps of the control method for the above-mentioned anti-scalding electric heater in this embodiment include:

[0101] Step 1: Power on;

[0102] When a user needs to use an electric heater for warmth, they should first turn on the power to put the heater into standby mode.

[0103] Step 2: Heating function detected as activated;

[0104] In this step, when the user needs to use the electric heater for warmth, they can operate the heating button in the button area 104 to activate the heater's heating function. The user can also operate the heating level button and fan speed button in the button area 104 to select the heating level and fan speed level, respectively. Heating levels include level one, level two, level three, etc., and fan speed levels include low, medium, high, etc. After the user activates the heating function, the control unit can detect that the heating function is on.

[0105] When the heating function of the electric heater is activated, the heating element inside the heater is powered on and begins to heat up. The heat from the heating element is blown into the room through the air outlet 101, so that the room temperature is raised evenly.

[0106] Step 3: Human detection function is detected as enabled;

[0107] In this step, when the user needs to use the anti-scalding function of the electric heater, they can operate the anti-scalding function key in the button area 104. The control unit can then detect that the human body detection mode is activated. At this time, the human body detection mode indicator on the display panel 103 lights up, the heater enters the anti-scalding function mode, and the radar detection device 2 begins to detect human body signals within the detection range 3 to provide real-time anti-scalding protection.

[0108] Step 4: If a human signal is detected within detection range 3, turn off the heating function and continue human detection until no human signal is detected within detection range 3 within time T, then turn on the heating function.

[0109] In this embodiment, the detection range 3 is further divided into a mandatory detection area 301 and an effective detection area 302. If a human signal is detected within the detection range 3, it is necessary to further determine whether the human signal belongs to the mandatory detection area 301 or the effective detection area 302.

[0110] Step (411): If the human body signal belongs to the mandatory detection zone 301, then the heating function is turned off;

[0111] When the human body signal falls within the mandatory detection zone 301, the heating function of the electric heater is first turned off, that is, the circuit of the heating element is disconnected, the power is cut off, and the heating is stopped, so that the main body 1 and the air outlet 101 are cooled down to prevent burns caused by human touch and to ensure user safety. At this time, the human body protection mode indicator on the display panel 103 lights up.

[0112] Step (412): Determine the magnitude of the human body's movement speed;

[0113] When the human body signal is in the mandatory detection zone 301, it means that the human body is very close to the air outlet 101. It is necessary to continue to pay close attention to the human body signal. The speed of the human body, such as its movement speed and hovering speed, will affect the detection accuracy of the human body signal. In order to ensure the detection accuracy, it is necessary to judge the speed of the human body movement.

[0114] Step (412): If the human body's movement speed is less than or equal to the preset movement speed v0, then ignore other signals in the environment and focus on capturing human body signals.

[0115] A preset moving speed v0 is set, and the current automatic speed V of the human body is obtained. If V≤v0, it means that the human body is moving very slowly or is stationary. It is necessary to focus on capturing the slight movement signal of the human body. The control unit will send a stationary detection signal to the radar detection device 2. After receiving the stationary detection signal, the radar detection device 2 ignores other signals in the environment and focuses on capturing the human body signal to detect the slight movement of the human body in time. It will also provide real-time anti-scalding protection to ensure the accuracy of recognition and reduce the situation where the radar mistakenly thinks that the human body signal has disappeared (i.e., the human body has left the forced detection area) because the human body is close to being stationary. This will also prevent the heating function from being accidentally activated and causing burns to the human body.

[0116] Step (413): If the human body’s movement speed is greater than the preset movement speed v0, then increase the detection frequency of the radar detection device 2 and increase the transmission power of the radar detection device 2.

[0117] If V is greater than v0, it indicates that the human body is moving at a relatively fast speed, and the detection frequency and transmission power need to be increased. The control unit will send a high-speed detection signal to the radar detection device 2. After receiving the high-speed detection signal, the radar detection device 2 will increase the detection frequency and transmission power to perform high-speed human body recognition, thereby improving the detection accuracy and ensuring the recognition accuracy.

[0118] Step (414): Continue human body detection until no human body signal is detected within the detection range 3 within time T, then start the heating function;

[0119] Human signal detection continues until no human signal is detected within the detection range 3 within time T. In this embodiment, T = 3 seconds. The heating function is then restarted, and the heating element is powered on and heated. At this time, the human protection mode indicator on the display panel 103 turns off.

[0120] Step (421): If the human body signal belongs to the valid detection area 302, then the heating function is turned off;

[0121] When the human body signal is within the valid detection zone 302, the heating function of the electric heater is first turned off, that is, the circuit of the heating element is disconnected, the power is cut off, and the heating is stopped, so that the main body 1 and the air outlet 101 are cooled down to prevent burns caused by human touch and to ensure user safety. At this time, the human body protection mode indicator on the display panel 103 lights up.

[0122] Step (422): Continue human body detection until no human body signal is detected within the detection range 3 within time T, then start the heating function.

[0123] The radar detection device 2 continues to monitor human body signals. If no human body signal is detected within the detection range 3 within time T, the heating function is restarted, even if the heating element is powered on again. In this embodiment, T = 3 seconds. At this time, the human body protection mode indicator on the display panel 103 is turned off.

[0124] Step 5: If no human signal is detected within detection range 3, continue with human detection.

[0125] In this step, if the radar detection device 2 does not detect a human signal within the detection range 3 while the electric heater is performing its heating function, it will continue to perform human detection and provide real-time anti-scalding protection to ensure the user's safety.

[0126] When the user does not need to use the anti-scalding function, they can press the anti-scalding function key in the button area 104 again. At this time, the human body detection mode indicator on the display panel 103 will turn off. In this case, the electric heater will only perform the heating function.

[0127] Step 6: Power off.

[0128] When the user no longer needs to use the electric heater, they can press the heating button in the button area 104 again to turn off the heating function and disconnect the power supply to turn off the electric heater.

[0129] Furthermore, in step four, if a human signal is detected within detection range 3, the heating function is turned off, and human detection continues until no human signal is detected within detection range 3 within time T. In the step of starting the heating function, after turning off the heating function, the following is also included: starting the high-speed mode of the fan in the anti-scalding electric heater, with a start time of t.

[0130] In other words, when a human body signal is detected, regardless of whether the human body signal belongs to the mandatory detection zone 301 or the effective detection zone 302, the heating function of the electric heater is first turned off, and then the high-speed mode of the fan is turned on to quickly cool down the heating element and the air outlet 101, thereby increasing the cooling speed and further preventing burn accidents. The start time of the high-speed mode of the fan can be set as needed. In this embodiment, the start time is t = 3s.

[0131] Furthermore, if the radar detection device 2 detects a human signal outside the detection range 3 and sends it to the control unit, the control unit will not send a command to the radar detection device 2. That is, at this time, the human body is far away from the air outlet 101 and does not need to be protected against burns.

[0132] The control method in this embodiment utilizes millimeter-wave radar detection technology to establish a human body detection zone (i.e., detection range) within a small area in the direction of the heater's air outlet. This zone detects human movements such as a hand approaching, and immediately shuts off the heating element upon detection to prevent burns. Forced detection zones and effective detection zones are established near the heater's air outlet, and programmed logic is used for human body detection judgment, improving detection accuracy and comfort. Based on data from different detection zones, radar algorithms are applied to achieve precise identification of human body position, judgment of hand movement speed, and judgment of hand hovering, improving recognition accuracy and significantly reducing false detections and frequent triggers. This achieves the heater's anti-scalding function without affecting its basic heating function.

[0133] This embodiment also provides a control device for the anti-scalding electric heater as described above, including:

[0134] The heating function detection module is used to detect whether the heating function is turned on.

[0135] The human body detection module is used to detect whether the human body detection function is enabled.

[0136] Human signal detection module, used to detect human signals;

[0137] The control unit is used to shut down the heating function of the heating module and continue human detection if the human signal detection module detects a human signal within the detection range 3, until the human signal detection module does not detect a human signal within the detection range 3 within time T, at which point the heating function is activated; if the human signal detection module does not detect a human signal within the detection range 3, human detection continues.

[0138] The control device in this embodiment can take timely protective measures when it detects a human body signal to prevent burns. This control device is not prone to false triggering, will not cause repeated on / off switching of the electric heater, will not affect the normal use of the electric heater, and will not affect the lifespan of the electric heater.

[0139] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An electric anti-scald heater, comprising: include: The main body (1) has an air outlet (101) and a heating element is provided inside the main body (1); A radar detection device (2) is installed on the main body (1). The radar detection device (2) is used to detect human signals. The detection range (3) of the radar detection device (2) covers the air outlet (101). A control unit is installed on the main body (1). The signal output terminal of the radar detection device (2) is electrically connected to the signal input terminal of the control unit. The signal output terminal of the control unit is electrically connected to the heating element and controls the on / off state of the heating element. The radar detection device (2) is a millimeter-wave radar detection device; The radar detection device (2) operates at a frequency of 24 GHz; The detection range (3) includes a mandatory detection area (301) and an effective detection area (302); The forced detection zone (301) is the area within (0,20] cm vertically upward from the air outlet (101) and (0,2] cm horizontally outward from the air outlet (101); The effective detection area (302) is the range within (20, 40] cm vertically upward from the air outlet (101) and (0, 2] cm horizontally outward from the air outlet (101); When the human body signal is in the forced detection zone (301), the heating function is turned off; the speed of human movement is determined; if the speed of human movement is less than or equal to the preset speed v0, other signals in the environment are ignored and human body signals are captured in a concentrated manner. If the human body moves faster than the preset moving speed v0, the detection frequency of the radar detection device (2) is increased and the transmission power of the radar detection device (2) is increased.

2. The anti-scald electric heater of claim 1, wherein The main body (1) is also provided with a handle (102), which is located near the air outlet (101), and the radar detection device (2) is located inside the handle (102).

3. The anti-scald electric heater of claim 1, wherein The main body (1) is also provided with a display panel (103), which is electrically connected to the control unit. The display panel (103) is provided with a human body detection mode indicator and a human body protection mode indicator.

4. A control method for the anti-scald electric heater as claimed in any one of claims 1 to 3, characterized in that, include: Heating function detected as enabled; Human detection function detected; If a human signal is detected within the detection range (3), the heating function is turned off and human detection continues until no human signal is detected within the detection range (3) within time T, at which point the heating function is turned on. If the human signal is not detected within the detection range (3), then human detection continues.

5. The control method according to claim 4, characterized by The step of turning off the heating function and continuing the human detection if a human signal is detected within the detection range (3) and no human signal is detected within the detection range (3) within time T, and then starting the heating function, includes: If the human body signal belongs to the mandatory detection zone (301), then the heating function will be turned off; Determine the speed of human movement; If the human body moves faster than the preset moving speed v0, the detection frequency of the radar detection device (2) is increased and the transmission power of the radar detection device (2) is increased. Continue the human body detection until no human body signal is detected within the detection range (3) within time T, then start the heating function.

6. The control method according to claim 5, characterized by In the step of determining the magnitude of human movement speed, if the human movement speed is less than or equal to the preset movement speed v0, other signals in the environment are ignored and the human movement signal is captured in a concentrated manner.

7. The control method according to claim 4, characterized by, The step of turning off the heating function and continuing the human detection if a human signal is detected within the detection range (3) and no human signal is detected within the detection range (3) within time T, and then starting the heating function, includes: If the human body signal belongs to the effective detection area (302), then the heating function is turned off; Continue the human body detection until no human body signal is detected within the detection range (3) within time T, then start the heating function.

8. The control method according to any one of claims 4 to 7, characterized in that, The step of turning off the heating function and continuing the human body detection until no human body signal is detected in the detection range (3) within time T, and then starting the heating function, further includes, after turning off the heating function: starting the high-speed mode of the fan in the anti-scalding electric heater, with a start time of t.

9. A control device for an anti-scalding electric heater as described in any one of claims 1-3, characterized in that, include: The heating function detection module is used to detect whether the heating function is turned on. The human body detection module is used to detect whether the human body detection function is enabled. Human signal detection module, used to detect human signals; The control unit is configured to, if the human signal detection module detects a human signal within the detection range (3), turn off the heating function of the heating module and continue human detection until the human signal detection module does not detect the human signal within the detection range (3) within time T, and then start the heating function; if the human signal detection module does not detect the human signal within the detection range (3), then continue human detection.

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