A human body sensing automatic ventilation control device for a bathroom

Abstract

This utility model discloses a bathroom automatic ventilation control device based on human body induction, including a power input terminal, a human body induction module, a mechanical timing module, a relay KA, a time relay KT, and a duct fan. The power input terminal L is connected to the power input terminal of the human body induction module, the normally open input terminal of relay KA, and the mechanical timing input terminal. The output terminal of the human body induction module is connected to the coil of the time relay and another normally open input terminal of relay KA. The control output terminal of the mechanical timing module and the normally open output terminal of relay KA are connected to the positive terminal of the duct fan. The coil of relay KA is connected to the other normally open output terminal of relay KA. The power input terminal N is connected to the coil of the time relay, the normally closed input terminal of the time relay, and the negative terminal of the duct fan. This utility model ventilates the bathroom through automatic start-up by human body induction and manual start-up, with timed stop, reducing the chance of infection and ensuring convenience, reliability, and hygiene safety.

Description

Technical Field

[0001] This utility model relates to the technical field of bathroom ventilation control devices, specifically a bathroom human body induction automatic ventilation control device. Background Technology

[0002] In the environmental control of restrooms (especially public restrooms and medical facility restrooms), ducted fans are key equipment for ensuring air quality, removing odors and moisture, and inhibiting bacterial growth. Traditional ventilation control methods mainly rely on manual switches, requiring users to manually press the switch to start the ducted fan and manually turn it off again when leaving or when it needs to be stopped. This method has significant problems: 1. It is cumbersome and inconvenient to operate, especially when hands are unclean or wet, resulting in a poor user experience; 2. Users may forget to turn off the ducted fan when leaving, leading to energy waste and equipment wear and tear; 3. It poses a risk of cross-infection, a particularly prominent issue in medical environments, as the frequently used manual switch surfaces easily accumulate various stains, bacteria, and viruses, becoming potential sources of cross-contamination. Users touching the switch surfaces risk infection or disease transmission. Existing technological solutions either fail to balance ease of use, energy efficiency, and reliability, or fail to completely address the rigid demand for "zero-contact" operation in high-hygiene environments (such as hospital restrooms and isolation ward restrooms).

[0003] Therefore, the market urgently needs a bathroom ventilation control device that combines the convenience and non-contact advantages of automatic start-up and timed stop-start with human body sensing, and provides an effective and non-contact backup manual start-up method (manual start-up is mainly used as a backup when human body sensing fails to ensure normal ventilation) in case of sensor failure. Utility Model Content

[0004] The purpose of this invention is to provide a bathroom ventilation control device that combines the convenience and non-contact advantages of automatic start-up and delayed stop by human body sensing, and provides an effective backup manual start-up method that does not require contact with other potential sources of pollution when the sensing fails.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bathroom human body induction automatic ventilation control device, comprising a power input terminal, a human body induction module, a mechanical timing module, a relay KA, a time relay KT, and a duct fan.

[0006] The power input terminal L is connected to the power input terminal of the human body sensing module, the normally open input terminal of the relay KA, and the mechanical timing input terminal, respectively. The output terminal of the human body sensing module is connected to the coil of the time relay and another normally open input terminal of the relay KA, respectively.

[0007] The control output terminal of the mechanical timing module and the normally open output terminal of the relay KA are both connected to the positive terminal of the duct fan;

[0008] The coil of relay KA is connected to another normally open output terminal of relay KA; the normally closed contact of time relay KT is connected in series between the coils of relay KA;

[0009] The power input terminal N is connected to the time relay coil, the normally closed input terminal of the time relay, and the negative terminal of the duct fan.

[0010] Furthermore, the mechanical timer adopts the 86-type mechanical timer, which is easy to install.

[0011] Furthermore, the human body sensing module adopts an 86-type active infrared diffuse reflection sensor, and the sensing distance can be adjusted in real time.

[0012] The beneficial effects of this utility model are:

[0013] This utility model discloses a toilet human body induction automatic ventilation control device. By cleverly combining human body induction automatic start technology with a mechanical timer start mechanism, the device automatically starts the duct fan when a user enters the toilet, completely eliminating the need for the user to search for or touch a switch. This achieves the convenience of "starting upon entry and stopping at a set time." When the device is working normally, the user can enjoy ventilation services without touching any switches or buttons, completely cutting off the path of cross-infection caused by contact with pathogens (such as bacteria and viruses) on switch surfaces. It is particularly suitable for high-infection-risk and high-hygiene-requirement environments such as hospital wards, clinics, and isolation area toilets, significantly improving hygiene and safety levels and reducing the probability of nosocomial infections. When the human body induction fails, the user only needs to rotate the mechanical timer knob to the desired duration (e.g., 5 minutes, 10 minutes, 15 minutes, etc.), and the duct fan will start and automatically stop after the set time. The automatic start (starting upon human detection) and automatic stop (preset delay) mechanisms effectively avoid long-term, unnecessary idling caused by the user forgetting to turn off the duct fan, directly saving energy and reducing operating costs. Attached Figure Description

[0014] Figure 1 This is a circuit diagram of the automatic ventilation control device for bathrooms with human body induction according to this utility model;

[0015] Figure 2 This is the electrical wiring diagram for this utility model;

[0016] Figure 3 This is a schematic diagram of the external structure of the bathroom human body induction automatic ventilation control device of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 This utility model provides a technical solution: a bathroom human body sensor automatic ventilation control device, including a power input terminal, a human body sensor module, a mechanical timing module, a relay KA, a time relay KT, and a duct fan.

[0019] The power input terminal L is connected to the power input terminal of the human body sensing module, the normally open input terminal of the relay KA, and the mechanical timing input terminal, respectively. The output terminal of the human body sensing module is connected to the coil of the time relay and another normally open input terminal of the relay KA, respectively.

[0020] The control output terminal of the mechanical timing module and the normally open output terminal of the relay KA are both connected to the positive terminal of the duct fan;

[0021] The coil of relay KA is connected to another normally open output terminal of relay KA; the normally closed contact of time relay KT is connected in series between the coils of relay KA;

[0022] The power input terminal N is connected to the time relay coil, the normally closed input terminal of the time relay, and the negative terminal of the duct fan.

[0023] Furthermore, the mechanical timer adopts the 86-type mechanical timer, which is easy to install.

[0024] Furthermore, the human body sensing module adopts an 86-type active infrared diffuse reflection sensor, and the sensing distance can be adjusted in real time.

[0025] The working principle of this utility model is as follows: When a user enters the infrared diffuse reflection sensing area of ​​the bathroom, the human body sensing module receives the signal, the output terminal of the human body sensing module is turned on, the automatic ventilation control device is activated, the time relay KT coil is energized and starts counting down, the normally closed contact of the time relay KT remains closed at the moment the time relay KT coil is energized, and the duct fan runs powerfully; when the time relay KT countdown ends, the normally closed contact of KT opens, the relay KA coil is de-energized, the powerful power supply path is cut off, the mechanical timing ends, the power supply to the fan is cut off, and the entire system is reset to standby mode.

[0026] This utility model discloses a toilet human body induction automatic ventilation control device. By cleverly combining human body induction automatic start technology with a mechanical timer start mechanism, the device automatically starts the duct fan when a user enters the toilet, eliminating the need for the user to search for or touch a switch. This achieves the convenience of "starting upon entry and stopping at a set time." When the device is working normally, the user can enjoy ventilation without touching any switches or buttons, completely cutting off the path of cross-infection caused by contact with pathogens (such as bacteria and viruses) on switch surfaces. It is particularly suitable for high-risk and high-hygiene environments such as hospital wards, clinics, and isolation area toilets, significantly improving hygiene and safety levels and reducing the probability of nosocomial infections. When the human body induction fails, the user only needs to rotate the mechanical timer knob to the desired duration (e.g., 5 minutes, 10 minutes, 15 minutes, etc.), and the duct fan will start and automatically stop after the set time. The automatic start (starting upon human detection) and automatic stop (preset delay) mechanisms effectively avoid long-term unnecessary idling caused by the user forgetting to turn off the duct fan, directly saving energy, reducing operating costs, and ensuring a lower infection rate.

Claims

1. A human body sensor-based automatic ventilation control device for a bathroom, comprising a power input terminal, a human body sensor module, a mechanical timing module, a relay KA, a time relay KT, and a duct fan, characterized in that: The power input terminal L is connected to the power input terminal of the human body sensing module, the normally open input terminal of the relay KA, and the mechanical timing input terminal, respectively. The output terminal of the human body sensing module is connected to the coil of the time relay and another normally open input terminal of the relay KA, respectively. The control output terminal of the mechanical timing module and the normally open output terminal of the relay KA are both connected to the positive terminal of the duct fan; The coil of relay KA is connected to another normally open output terminal of relay KA; the normally closed contact of time relay KT is connected in series between the coils of relay KA; The power input terminal N is connected to the time relay coil, the normally closed input terminal of the time relay, and the negative terminal of the duct fan.

2. The automatic ventilation control device for a bathroom with human body induction as described in claim 1, characterized in that: The mechanical timer uses an 86-type mechanical timer, which is easy to install.

3. The automatic ventilation control device for a bathroom with human body induction as described in claim 1, characterized in that: The human body sensing module uses an 86-type active infrared diffuse reflection sensor, and the sensing distance can be adjusted in real time.

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