CN204301320U - A kind of water heater with human body sensing device - Google Patents

Abstract

The utility model discloses a water heater with a human body induction device, which comprises: a main control chip, which is characterized in that a pyroelectric infrared sensor, a display screen and a key indicator light are connected to the main control chip; the main control chip receives heat Discharge the signal of the infrared sensor, and control the wake-up and shutdown of the display screen and button indicator light according to the received signal. Compared with the prior art, the utility model applies the pyroelectric infrared sensor to the water heater to realize the automatic wake-up and shutdown of the water heater display screen and the indicator light, with outstanding energy-saving effect and good practicability.

Description

A water heater with a human body induction device

technical field

The utility model relates to the technical field of water heater control, in particular to a water heater with a human body induction device.

Background technique

Water heater is a very commonly used household appliance. With the advancement of technology, many water heaters are controlled by touch screen. However, when the device is not turned on at night or when the indoor light is dark, people cannot find the corresponding operation buttons for setting, which is inconvenient to operate. At the same time, in the power-on state, the LED display screen of the water heater is on for a long time, and it is always in a wake-up state, which is very easy to cause damage, so that the entire water heater controller cannot be used. In addition, for common water heaters with on/off button power indicator function, the power LED light is always on, the LED indicator light works for a long time, the brightness and life are gradually reduced, and it is easy to be damaged.

Contents of the invention

Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a water heater which can be automatically awakened by the display screen and the button indicator light.

In order to achieve the above object, the utility model adopts the following technical solutions.

A water heater with a human body induction device, comprising: a main control chip, characterized in that a pyroelectric infrared sensor, a display screen and a key indicator light are connected to the main control chip; the main control chip receives the pyroelectric infrared sensor signal, and control the wake-up and shutdown of the display screen and button indicator light according to the received signal.

As a further description of the above scheme, the model of the main control chip is MB95F263KPF, and the eighteenth pin of the main control chip is connected to the signal output end of the pyroelectric infrared sensor; the fourteenth, thirteenth, and twelve pins of the main control chip The pins are connected to the display screen through the driver chip.

As a further description of the above solution, the model of the driver chip is TM1638.

As a further illustration of the above solution, a signal amplification circuit is also connected between the pyroelectric infrared sensor and the main control chip.

As a further description of the above scheme, the pyroelectric infrared sensor includes a Fresnel filter and a pyroelectric element. The pyroelectric element is two capacitors connected in reverse, and the infrared rays are enhanced by the Fresnel filter. Then gather on the pyroelectric element.

As a further illustration of the above solution, a photoresistor is also provided on the pyroelectric infrared sensor.

Compared with the prior art, the utility model has the following beneficial effects:

1. By connecting the pyroelectric infrared sensor, the display screen and the button indicator light on the main control chip, it is avoided to keep the display screen and the button indicator light on, so as to improve the service life of the display screen and save energy.

2. The pyroelectric infrared sensor is used to realize the intelligent control and adjustment of the sensing angle and distance, and the sensor itself has low power consumption.

3. By adding a photoresistor to the pyroelectric infrared sensor, it can suppress the triggering of the display screen and LED to keep lighting up during the day, which is more energy-saving.

Description of drawings

Shown in Fig. 1 is the control principle diagram of the water heater with the human body induction device provided by the utility model;

Figure 2 shows the circuit connection diagram of the control chip;

Figure 3 shows the drive display circuit diagram;

Figure 4 is a schematic diagram of the structure of the human body sensor.

Detailed ways

In order to further illustrate the essence of the utility model, the specific implementation of the utility model is described as follows in conjunction with the accompanying drawings.

As shown in Figure 1, a water heater with a human body induction device includes: a main control chip 1, a pyroelectric infrared sensor 2, a display screen 3 and a key indicator light 4; the main control chip 1 receives the pyroelectric infrared sensor 2, and control the wake-up and shutdown of the display screen 3 and the button indicator light 4 according to the received signal. Both the display screen 3 and the button indicator light 4 adopt LEDs as light sources.

During actual work, in the power-on standby state, when a person enters the set sensing range, the pyroelectric infrared sensor 2 receives the human body signal, then outputs a high level, and automatically wakes up the water heater display screen 3 and the button indicator light 4 . When the light is dark at night, you can also find the button position corresponding to the water heater for operation and setting, which has the function of night vision operation. In the power-on standby state, when the person is far away from the sensing range, and there is no need to adjust the water heater at this time, the pyroelectric infrared sensor 2 outputs a low level, and the main control chip 1 receives the signal, and automatically turns off the water heater display 3 and button indication light 4.

As shown in Figure 2 and Figure 3, the model of the main control chip 1 is MB95F263KPF, the eighteenth pin of the main control chip 1 is connected to the signal output end of the pyroelectric infrared sensor 2; the fourteenth pin of the main control chip 1 Pins 13, 12 are connected to the display screen 3 through the driver chip. In this embodiment, the model of the driver chip is TM1638. In particular, in order to ensure that the signals can be accurately identified, a signal amplification circuit is also connected between the pyroelectric infrared sensor 2 and the main control chip.

As shown in FIG. 4 , the pyroelectric infrared sensor 2 includes a Fresnel filter 21 and a pyroelectric element 22 , and the pyroelectric element is two capacitors connected in reverse. The working principle is: the 10μm infrared rays emitted by the human body are enhanced by the Fresnel filter 21 and then gathered on the pyroelectric element 22. The positive and negative charges with opposite polarity and equal electric quantity are generated at the terminal, so the positive and negative charges cancel each other out, there is no current in the circuit, and the pyroelectric infrared sensor has no output. When the human body is still in the detection area, the energy of the infrared light irradiated on the two capacitors is equal and balanced, and the photocurrents with opposite polarities and equal energy cancel each other out in the circuit, and the pyroelectric infrared sensor still has no signal output. . When the human body moves in the detection area, the infrared energy irradiated on the two capacitors is not equal, the photocurrent cannot cancel each other in the circuit, and the pyroelectric infrared sensor has a signal output. The pyroelectric infrared sensor using this technology is applied to the water heater, effectively overcomes the shortcomings of the prior art, provides a human body sensing device technology, and has stronger practicability.

Further, in order to prevent the water heater from receiving the signal of the pyroelectric infrared sensor 2 during the daytime to light up the display screen 3 and the indicator light 4, a photoresistor is also provided on the pyroelectric infrared sensor 2 to suppress the triggering of the display screen and the indicator lamp 4 during the daytime. The LED is always on, which is more energy-saving.

The above specific embodiments have described the essence of the utility model in detail, but the protection scope of the utility model cannot be limited by this. Obviously, under the enlightenment of the essence of the utility model, those skilled in the art can also make many improvements and modifications. It should be noted that these improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims (6)

1. A water heater with a human body induction device, comprising: a main control chip, which is characterized in that a pyroelectric infrared sensor, a display screen and a key indicator light are connected on the main control chip; the main control chip receives pyroelectric Infrared sensor signals, and control the wake-up and shutdown of the display screen and key indicator lights according to the received signals. 2. A water heater with a human body induction device according to claim 1, wherein the model of the main control chip is MB95F263KPF, and the eighteenth pin of the main control chip is connected to the signal output of the pyroelectric infrared sensor terminal; the fourteenth, thirteenth, and twelve pins of the main control chip are connected to the display screen through the driver chip. 3. A water heater with a human body sensing device according to claim 2, wherein the model of the driving chip is TM1638. 4. A water heater with a human body sensing device according to claim 2, characterized in that a signal amplification circuit is further connected between the pyroelectric infrared sensor and the main control chip. 5. A water heater with a human body induction device according to claim 1, wherein the pyroelectric infrared sensor comprises a Fresnel filter and a pyroelectric element, and the pyroelectric element is a reflective sensor. The two capacitors are connected, and the infrared rays are enhanced by the Fresnel filter and then collected on the pyroelectric element. 6. A water heater with a human body sensing device according to claim 1, characterized in that a photoresistor is also provided on the pyroelectric infrared sensor.