CN206803513U - A kind of safety power-off device and electric heater - Google Patents

Abstract

The embodiment of the utility model provides a safety power-off device and an electric water heater, which relate to the technical field of electric water heaters. The safety power-off device includes a housing, an infrared sensor, a controller, a switch and an alarm, and the infrared sensor, the controller, the switch and the alarm are arranged in the housing, and the controller is connected to the The infrared sensor, the switch and the alarm are electrically connected. The detection area is detected by the infrared sensor, and if someone enters the detection area, a signal is sent to the controller, and the controller controls the switch to cut off the power supply to the electric water heater, and at the same time, the alarm indicator light can be turned on. The safety power-off device enables the electric water heater to be powered off before being used by people, so that users can overcome the psychological obstacles of being electrocuted, and use it more safely. It does not need to install batteries, saves manufacturing costs and maintenance costs, and the electrical connection through wires is highly reliable. , suitable for broad promotion.

Description

A safety power-off device and an electric water heater

technical field

The utility model relates to the technical field of electric water heaters, in particular to a safety power-off device and an electric water heater.

Background technique

An electric water heater is a water heater that uses electricity as energy for heating. There are many personal injury accidents caused by the use of electric water heaters in our country every year. Most of the reasons are caused by environmental leakage (no ground wire, ground wire failure, ground wire electrification, tap water pipe electrification, etc.). An existing electric water heater leakage protection safety box is composed of a box and an intelligent socket. After the box collects the user's water behavior through the water flow sensor, it sends a wireless signal to the smart plug, and the smart plug cuts off the three poles of the power supply to protect the user's bathing safety. However, it is necessary for the user to touch the water heater (after turning on the tap) before the power is cut off, which has potential safety hazards, and the box is generally powered by a dry battery or a water flow generator, and the maintenance cost is high.

Utility model content

In view of this, the embodiment of the utility model provides a safety power-off device and an electric water heater to improve the problems of the electric water heater leakage protection safety box in the prior art that requires the user to touch the water heater before power-off and high maintenance costs.

In the first aspect, a safety power-off device provided by an embodiment of the utility model is applied to an electric water heater, and includes a casing, an infrared sensor, a controller, a switch, and an alarm. The infrared sensor, the controller, the The switch and the alarm are arranged in the housing, and the controller is electrically connected to the infrared sensor, the switch, and the alarm respectively; the infrared sensor is configured to detect whether a human body enters a preset area , and send a trigger signal, the controller is configured to control the switch to cut off the power supply to the electric water heater according to the trigger signal, and issue an alarm command, and the alarm device is configured to alarm according to the alarm command.

In combination with the first aspect, the embodiment of the present utility model also provides a first possible implementation manner of the first aspect, wherein the safety power-off device further includes a step-down circuit, the step-down circuit is connected to the mains, and the The step-down circuit is configured to drop the commercial power to a preset voltage and supply power to the infrared sensor, the controller and the alarm.

In combination with the first aspect, the embodiment of the present utility model also provides a second possible implementation manner of the first aspect, wherein the safety power-off device further includes a pin and a pin seat, and the pin is configured to be connected to three Pole connection, the socket is configured to be inserted into the plug of the electric water heater.

In combination with the second possible implementation manner of the first aspect, the embodiment of the present utility model also provides a third possible implementation manner of the first aspect, wherein the switch is a release, and the release is electrically connected to the Between the pin and the socket, the tripper is configured to cut off the power supply from the pin to the socket.

In combination with the third possible implementation of the first aspect, the embodiment of the present utility model also provides a fourth possible implementation of the first aspect, wherein the safety power-off device further includes a leakage detection circuit, and the leakage detection circuit Electrically connected with the controller, the leakage detection circuit is configured to detect whether the neutral wire, the live wire or the ground wire is leakage.

In combination with the fourth possible implementation manner of the first aspect, the embodiment of the present utility model also provides a fifth possible implementation manner of the first aspect, wherein the electric leakage detection circuit includes an induction coil, and when the neutral wire, live wire or ground wire When leakage occurs, the induction coil outputs an electric signal to the controller, and the controller controls the release to cut off the power supply from the pin to the pin seat.

In combination with the first aspect, the embodiment of the present utility model also provides a sixth possible implementation manner of the first aspect, wherein the safety power-off device further includes an amplifier, and the amplifier is connected to the infrared sensor and the controller between.

In combination with the first aspect, the embodiment of the present utility model also provides a seventh possible implementation manner of the first aspect, wherein, when the controller does not receive the trigger signal of the infrared sensor within a preset time, the control The heater controls the switch to turn on the power supply to the electric water heater.

In combination with the first aspect, the embodiment of the present utility model also provides an eighth possible implementation manner of the first aspect, wherein the switch is a relay, and the alarm is an audible and visual alarm.

In the second aspect, the embodiment of the utility model also provides an electric water heater, including a water tank, a plug, and a safety power-off device, the safety power-off device is used to connect to the mains, and the plug is configured to The power-off device supplies power to the water tank; the safety power-off device includes a housing, an infrared sensor, a controller, a switch and an alarm, and the infrared sensor, the controller, the switch and the alarm are arranged on In the housing, the controller is electrically connected to the infrared sensor, the switch and the alarm respectively; the infrared sensor is configured to detect whether a human body enters a preset area, and send a trigger signal, the The controller is configured to control the switch to cut off the power supply to the electric water heater according to the trigger signal, and the alarm is configured to alarm according to an instruction of the controller.

Compared with the prior art, the safety power-off device and the electric water heater provided by the embodiment of the utility model, the safety power-off device includes a housing, an infrared sensor, a controller, a switch and an alarm, the infrared sensor, the controller , the switch and the alarm are arranged in the housing, and the controller is electrically connected to the infrared sensor, the switch and the alarm respectively. The detection area is detected by the infrared sensor, and if someone enters the detection area, a signal is sent to the controller, and the controller controls the switch to cut off the power supply to the electric water heater, and at the same time, the alarm indicator light can be turned on. The safety power-off device enables the electric water heater to be powered off before being used by people, so that users can overcome the psychological obstacles of being electrocuted, and use it more safely. It does not need to install batteries, saves manufacturing costs and maintenance costs, and the electrical connection through wires is highly reliable. , suitable for broad promotion.

In order to make the above-mentioned purpose, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below, together with the accompanying drawings, and are described in detail as follows.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is a diagram of the connection relationship between the electric water heater and the safety power-off device provided by the first embodiment of the present invention.

Fig. 2 is a block diagram of the safety power-off device provided by the first embodiment of the present invention.

Fig. 3 is a block diagram of the safety power-off device provided by the second embodiment of the present invention.

Fig. 4 is a schematic structural view of the electric water heater provided by the third embodiment of the present invention.

Icons: 10-electric water heater; 100-safety power-off device; 200-water tank; 300-plug; 101-pin; 102-step-down circuit; 103-controller; 104-infrared sensor; 105-switch; ; 107-release device; 108-amplifier; 109-leakage detection circuit; 110-alarm.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

first embodiment

Please refer to FIG. 1 , which is a diagram of the connection relationship between the electric water heater 10 and the safety power-off device 100 provided by the first embodiment of the present invention. The electric water heater 10 includes a water tank 200 and a plug 300. The water tank 200 is used to store water, and there is a heating device in the water tank 200. The plug 300 is used to connect with the safety power-off device 100 and connect to the 220V mains to make the water tank 200 The heating device is heated for users to use hot water.

Please refer to FIG. 2 , which is a block diagram of the safety power-off device 100 provided by the first embodiment of the present invention. The safety power-off device 100 includes a pin 101, a pin seat 106, an infrared sensor 104, a controller 103, a switch 105, a step-down circuit 102 and an alarm 110, and the infrared sensor 104, the step-down circuit 102, the switch 105 and an alarm The controllers 110 are electrically connected to the controller 103.

The pin 101 is used to connect with the neutral wire and the live wire, and is used to connect to the 220V commercial power, and the pin 101 is also grounded. In this way, the 220V alternating current can be used as the power supply of the electric water heater 10 and the safety disconnection device 100 of this embodiment.

The pin seat 106 is used to insert the plug 300 of the water heater. Specifically, the safety power-off device 100 includes a housing for accommodating the pin 101, the pin seat 106, the infrared sensor 104, the controller 103, the switch 105, Devices such as the step-down circuit 102 and the alarm 110 are provided with three through holes on the housing, and the three through holes correspond to the pin sockets 106 respectively. The plug 300 of the water heater can be inserted into the three through holes through the conductive copper sheet, further It is electrically connected with the socket 106 . The shape of the three through holes can be rectangle, semicircle, etc.

The 220V commercial power is transmitted to the electric water heater 10 through the pin 101 and the pin base 106 , and the switch 105 can be used to cut off the power supply from the pin 101 to the pin base 106 . The switch 105 may be a release, a relay, and the like.

The step-down circuit 102 is electrically connected to the pin 101, and the step-down circuit 102 is used to step down the 220V commercial power to a preset voltage and convert it into direct current, so as to meet the working requirements of the controller 103, the infrared sensor and the switch 105 . For example, the preset voltage can be 12V to meet the operating voltages of the controller 103 , the infrared sensor and the switch 105 .

The infrared sensor 104 is used to detect whether there is infrared radiation radiated by the human body in a preset area, and the preset area is the detection range of the infrared sensor 104, for example, a range of 10410 meters from the infrared sensor 104. Infrared sensor 104 detects the infrared rays radiated by the human body in real time. When the user enters the bathroom in which the safety power-off device 100 is installed and approaches the detection area of the infrared sensor 104, the infrared sensor 104 detects the infrared rays radiated by the human body. 104 sends a trigger signal to the controller 103 .

The controller 103 is used for controlling the switch 105 to close according to the trigger signal of the infrared sensor 104 . For example, when the controller 103 receives the trigger signal sent by the infrared sensor 104 , the controller 103 controls the switch 105 to turn off, cutting off the power supply from the pin 101 to the socket 106 , and further cutting off the power supply to the electric water heater 10 . The controller 103 may be an integrated circuit chip with signal processing capabilities. The aforementioned controller 103 may be a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC).

Further, when the controller 103 does not receive the trigger signal of the infrared sensor 104 within a preset time, the controller 103 is also used to control the switch 105 to open, so as to connect the commercial power to the The power supply of electric water heater 10. The preset time can be pre-set in the controller 103, and the set time can be 5 minutes, 10 minutes, 11 minutes and so on.

The alarm 110 is used for alarming according to the instruction of the controller 103 , and the alarm 110 may be an audible and visual alarm 110 . When the controller 103 receives the trigger signal from the infrared sensor 104, it can send a first alarm command to the alarm 110, and the alarm 110 emits a yellow light.

The infrared sensor 104 monitors in real time whether someone enters the preset area, and the switch 105 is opened or closed by the controller 103. When the user uses the electric water heater 10 and has not touched it, the safety power-off device 100 can cut off the electric water heater 100. The power supply of the electric water heater 10 prevents the user from getting an electric shock. Talents contact the electric water heater 10 after the power is cut off first, so that the user can overcome the psychological obstacle of being electrocuted and use it more safely.

second embodiment

Please refer to FIG. 3 , which is a block diagram of the safety power-off device 100 provided by the second embodiment of the present invention. The difference between the safety power-off device 100 of this embodiment and the first embodiment is that the safety power-off device 100 of this embodiment also includes a leakage detection circuit 109 and an amplifier 108, and the device that cuts off the power supply from the pin 101 to the pin base 106 is a disconnector. Buckle 107.

The leakage detection circuit 109 is electrically connected to the controller 103, and the leakage detection circuit 109 is used to detect whether the neutral wire, live wire or ground wire is leaking. Specifically, the electric leakage detection circuit 109 includes an induction coil, and the induction coil can sense the electric leakage of the neutral wire, live wire or ground wire. When the zero wire, live wire or ground wire leaks, the electromotive force generated by the induction coil is out of balance, and the induction coil outputs an electrical signal to the controller 103. After the controller 103 detects the change of the electrical signal, it controls the release 107 to cut off The pin 101 supplies power to the pin socket 106 .

When the leakage detection circuit 109 detects a leakage in the neutral wire, the live wire or the ground wire, the controller 103 sends a second alarm command to the alarm 110, and the alarm 110 can emit a red light and an alarm sound.

Described amplifier 108 is connected between described infrared sensor 104 and described controller 103, when people approached in the infrared sensor 104 detection range, the weak signal that infrared sensor 104 produces is output to controller 103 after being amplified by amplifier 108 After the controller 103 receives the amplified signal, it controls the tripper 107 to trip, so that the pin 101 is separated from the pin seat 106 , and the power supply to the electric water heater 10 is cut off.

It should be mentioned that the safety power-off device 100 of this embodiment is also applicable to other electrical devices, such as electric rice cookers, washing machines, and the like.

third embodiment

Please refer to FIG. 4 , which is a schematic structural diagram of the electric water heater 10 provided by the third embodiment of the present invention. This embodiment provides an electric water heater 10, including a water tank 200 and a safety power-off device 100, and the water tank 200 and the safety power-off device 100 are connected by a cable. When in use, insert the pin 101 of the safety power-off device 100 into the interface of the 220V mains, and perform safety monitoring and power-off through the safety power-off device 100 , which can ensure the safety of the electric water heater 10 for users.

Of course, in other specific implementation manners, the electric water heater 10 may also include a plug 300, which is arranged between the water tank 200 and the safety power-off device 100 as a transition device. In this way, it is compatible with water heaters already in use.

In summary, the safety power-off device and the electric water heater provided by the embodiment of the utility model include an infrared sensor, a controller, a switch and an alarm. The infrared sensor detects the detection area. If someone enters the detection area, A signal is sent to the controller, and the controller controls the switch to cut off the power supply to the electric water heater, and at the same time, the alarm indicator light can be turned on. The safety power-off device enables the electric water heater to be powered off before being used by people, so that users can overcome the psychological obstacles of being electrocuted, and use it more safely. It does not need to install batteries, saves manufacturing costs and maintenance costs, and the electrical connection through wires is highly reliable. , suitable for broad promotion.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the utility model is used. It is only for the convenience of describing the utility model and simplifying the description, rather than Any indication or implication that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present utility model, it should also be noted that, unless otherwise specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection , can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediary, and can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model. It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. A safety power-off device, which is applied to electric water heaters, is characterized in that it includes a housing, an infrared sensor, a controller, a switch and an alarm, and the infrared sensor, the controller, the switch and the alarm The controller is arranged in the housing, and the controller is electrically connected to the infrared sensor, the switch and the alarm respectively; The infrared sensor is configured to detect whether a human body enters a preset area, and sends a trigger signal, and the controller is configured to control the switch to cut off the power supply to the electric water heater according to the trigger signal, and issue an alarm command , the alarm is configured to alarm according to the alarm instruction. 2. The safety power-off device according to claim 1, characterized in that, the safety power-off device further comprises a step-down circuit, the step-down circuit is connected to the mains, and the step-down circuit is configured to turn the mains The electricity drops to a preset voltage and supplies power to the infrared sensor, the controller and the alarm. 3. The safety power-off device according to claim 1, characterized in that, the safety power-off device further comprises a pin and a pin base, the pins are configured to be connected to three poles of the mains, and the pin base is A plug configured to be inserted into the electric water heater. 4. The safety power-off device according to claim 3, wherein the switch is a tripper, and the tripper is electrically connected between the pin and the pin seat, and the tripper configured to cut off power from the prong to the receptacle. 5. The safety power-off device according to claim 4, characterized in that, the safety power-off device further comprises a leakage detection circuit, the leakage detection circuit is electrically connected to the controller, and the leakage detection circuit is configured Completely detect whether the neutral wire, live wire or ground wire is leaking. 6. The safety power-off device according to claim 5, wherein the leakage detection circuit includes an induction coil, and when a leakage occurs in the neutral wire, live wire or ground wire, the induction coil outputs an electrical signal to the controller, The controller controls the tripper to cut off the power supply from the pin to the pin seat. 7. The safety power off device according to claim 1, further comprising an amplifier connected between the infrared sensor and the controller. 8. The safety power-off device according to claim 1, characterized in that, when the controller does not receive the trigger signal of the infrared sensor within a preset time, the controller controls the switch to turn on the power Power supply to the electric water heater. 9. The safety power-off device according to claim 1, wherein the switch is a relay, and the alarm is an audible and visual alarm. 10. An electric water heater, characterized in that it comprises a water tank, a plug, and the safety power-off device according to any one of claims 1 to 9, the safety power-off device is used to connect to the mains, and the plug is configured as Plug in the safety disconnect to power the tank.