Zero-crossing detection device guard

Abstract

This utility model discloses a protective device for a zero-crossing detection device, comprising a housing, a fan fixedly embedded through the side wall of the housing, a perforation above the fan penetrating the housing, a zero-crossing detection device fixedly mounted on the inner wall of the housing, an internal environment monitoring device above the zero-crossing detection device, and a monitoring sensor above the internal environment monitoring device; a control processing unit is located within the internal environment monitoring device, a display screen is mounted on the internal environment monitoring device, a status light is located below the display screen, and an adjustment button is located below the status light; the monitoring sensor and the adjustment button are all connected to the input terminal of the control processing unit, and the fan, display screen, and status light are all connected to the output terminal of the control processing unit. This utility model has strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of zero-crossing detection device protection technology, specifically a zero-crossing detection device protection device. Background Technology

[0002] A zero-crossing detection device is an electronic device used to detect the zero-crossing point of an AC signal. Its function is to accurately identify the moment when the AC waveform crosses zero from positive to negative or vice versa, thereby enabling the measurement of signal frequency and phase and efficient control of the equipment. The core principle of a zero-crossing detection device is to compare the input AC signal with a zero-level reference using a comparator or dedicated integrated circuit (such as the GS1102). When the signal level exceeds zero, a high-level signal is output; otherwise, a low-level signal is output.

[0003] Widely used in the following fields, demonstrating its versatility and practicality: Industrial control motor speed regulation: In frequency converters, zero-crossing detection enables soft starting and precise speed regulation of motors, reducing mechanical wear and energy waste. Power electronic equipment: In UPS power supplies and inverters, it ensures that switching devices switch at zero-crossing points, improving system efficiency and stability. Smart home dimming and temperature control: In smart bulbs and air conditioners, zero-crossing detection enables stepless dimming and precise temperature control, enhancing user experience. Relay control: In smart sockets, zero-crossing detection closes relays, reducing sparks and electromagnetic interference and extending equipment life. New energy system solar inverters: During grid connection, zero-crossing detection ensures synchronization with the grid, guaranteeing inverter connection at zero-crossing points and avoiding current surges. Wind power generation: When generators are connected to the grid, zero-crossing detection achieves phase matching, improving power generation efficiency.

[0004] However, in applications such as "202222036642.X", which focuses on offshore wind power applications, traditional zero-crossing detection devices do not address the issue of salt spray accumulating in the distribution box, which can easily corrode internal components such as capacitors and significantly shorten the device's lifespan. Therefore, in such harsh environments with high temperature, humidity, and salinity, traditional zero-crossing sensors cannot achieve normal operating levels.

[0005] Therefore, a zero-crossing detection device protection device is needed to address this problem. Utility Model Content

[0006] The purpose of this invention is to provide a protective device for a zero-crossing detection device. This invention utilizes a fan installed on the side wall of the zero-crossing detection device, a filter screen installed through perforations, and temperature, humidity, and fiber optic grating salinity sensors to monitor the parameters of the zero-crossing detection sensor's operating environment. When the salinity and temperature / humidity thresholds are exceeded, the fan is activated to circulate air around the zero-crossing detection device, preventing large-scale deposition of salinity particles on the PCB board of the zero-crossing detection sensor. This avoids corrosion of the components on the PCB board by salinity particles. Furthermore, this invention allows adjustment of the control processing unit and sensor data via adjustment buttons, displays the sensor's operating status via status lights, and provides a display screen. Additionally, the PCB board of the zero-crossing detection sensor is sealed with epoxy resin, further protecting the components on the PCB board and significantly improving the service life of the zero-crossing detection device in complex and harsh environments. This invention is highly practical.

[0007] This utility model is implemented as follows:

[0008] A zero-crossing detection device protective device includes a housing, a fan fixedly embedded through the side wall of the housing, a perforation extending through the housing above the fan, and a salt spray filter screen disposed on the perforation. The salt spray filter screen can filter most of the salt spray particles in the air, and there is at least one perforation.

[0009] A zero-crossing detection device is fixedly installed on the inner wall of the housing. An internal environment monitoring device is installed above the zero-crossing detection device. A monitoring sensor is installed above the internal environment monitoring device. The control processing unit adopts an STM32 control processing unit. The monitoring sensor includes a temperature and humidity sensor and a fiber optic grating salinity sensor.

[0010] A control processing unit is provided inside the internal environment monitoring device of the housing. A display screen is provided on the internal environment monitoring device, with a status light below the display screen and an adjustment button below the status light. The monitoring sensor and adjustment button are all connected to the input terminal of the control processing unit, and the fan, display screen, and status light are all connected to the output terminal of the control processing unit. A terminal block for connection to the zero-crossing detection device is provided on one side of the device, with an input and output wire connected to the terminal block. A through-hole is provided at the bottom of the housing, through which the input and output wires pass.

[0011] Furthermore, the PCB board inside the zero-crossing detection device is encapsulated with an epoxy resin layer. The epoxy resin further protects the components on the PCB board.

[0012] Furthermore, a swing door is provided on one side of the housing. The swing door facilitates closing the entire housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By installing a fan on the side wall of the zero-crossing detection device, and by installing a filter screen through perforations, along with temperature and humidity sensors and fiber optic grating salinity sensors, the working environment parameters of the zero-crossing detection sensor are monitored. When the salinity and temperature and humidity thresholds are exceeded, the fan is activated to ventilate, allowing the air around the zero-crossing detection device to circulate, thus preventing large-scale deposition of salinity particles on the PCB board of the zero-crossing detection sensor, thereby preventing salinity particles from corroding the components on the PCB board. Furthermore, this application allows adjustment of the control processing unit and monitoring sensor data via adjustment buttons, displays the working status of the monitoring sensor via status lights, and displays the status on a display screen. In addition, this application seals the PCB board of the zero-crossing detection sensor with epoxy resin, further protecting the components on the PCB board, greatly improving the service life of the zero-crossing detection device in complex and harsh environments, and demonstrating strong practicality. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the device of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the system structure of this utility model;

[0018] Figure 4 This is a circuit diagram of the control processing unit of this utility model;

[0019] The components include: housing 1, perforation 10, swing door 11, fan 2, zero-crossing detection device 3, PCB board 31, epoxy resin layer 32, side strip hole of zero-crossing detection device 33, inlet wire 34, monitoring sensor 4, wiring terminal 5, internal environment monitoring device 6, display screen 61, status light 62, and adjustment button 63. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] Please see Figures 1-4 A zero-crossing detection device protection device includes a housing 1. A fan 2 is fixedly embedded in the side wall of the housing 1, penetrating the side wall. A perforation 10 is provided above the fan 2, penetrating the housing. A salt spray filter is provided on the perforation 10. The salt spray filter can filter most of the salt spray particles in the air, and there is at least one perforation.

[0022] A zero-crossing detection device 3 is fixedly installed on the inner wall of the housing 1. An internal environment monitoring device 6 is installed above the zero-crossing detection device 3. A monitoring sensor 4 is installed above the internal environment monitoring device 6. The control processing unit adopts an STM 32 type control processing unit. The monitoring sensor 4 includes a temperature and humidity sensor and a fiber optic grating salinity sensor.

[0023] A control processing unit is provided inside the internal environment monitoring device 6 of the housing. A display screen 61 is provided on the internal environment monitoring device, and a status light 62 is located below the display screen 61. An adjustment button 63 is located below the status light 62. The monitoring sensor 4 and the adjustment button 63 are both connected to the input terminal of the control processing unit. The fan 2, the display screen 61, and the status light 62 are all connected to the output terminal of the control processing unit. A terminal block for connection to the zero-crossing detection device is provided on one side of the device. An inlet wire 34 and an outlet wire are connected to the terminal block. A through-hole is provided at the bottom of the housing, through which the inlet and outlet wires pass.

[0024] In this embodiment, an epoxy resin layer 32 is encapsulated on the PCB board 31 inside the zero-crossing detection device. The epoxy resin further protects the components on the PCB board.

[0025] In this embodiment, a hinged door 11 is provided on one side of the housing. The hinged door 11 facilitates closing the entire housing.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective device for a zero-crossing detection device, characterized in that: Includes a housing (1), a fan (2) is fixedly embedded in the side wall of the housing (1), a perforation (10) is provided above the fan (2) through the housing, a zero-crossing detection device (3) is fixedly provided on the inner wall of the housing (1), an internal environment monitoring device (6) is provided above the zero-crossing detection device (3), and a monitoring sensor (4) is provided above the internal environment monitoring device. A control processing unit is provided inside the internal environment monitoring device of the housing. A display screen (61) is provided on the internal environment monitoring device of the housing. A status light (62) is provided below the display screen (61). An adjustment button (63) is provided below the status light (62). The monitoring sensor (4) and the adjustment button (63) are all connected to the input end of the control processing unit. The fan (2), the display screen (61) and the status light (62) are all connected to the output end of the control processing unit.

2. A zero-crossing detection device guard according to claim 1, wherein, The zero-crossing detection device has a terminal block (5) connected to it on one side. The terminal block (5) is connected to an inlet wire (34) and an outlet wire. A wire hole is provided through the bottom of the housing, and a connecting wire is provided through the wire hole. The connecting wire is connected to the terminal block (5).

3. A zero-crossing detection device guard according to claim 1, wherein, The PCB board (31) inside the zero-crossing detection device is encapsulated with an epoxy resin layer (32).

4. A zero-crossing detection device guard according to claim 1, wherein, The control processing unit adopts an STM32 control processing unit, and the monitoring sensor (4) includes a temperature and humidity sensor and a fiber optic grating salinity sensor.

5. A zero-crossing detection device guard according to claim 1, wherein, There is at least one perforation.

6. A zero-crossing detection device guard according to claim 1, wherein, A hinged door (11) is provided on one side of the housing.

7. A zero-crossing detection device guard according to claim 1, wherein, A salt spray filter is provided on the perforation (10).

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