Automatic control device for explosion-proof fan in charging room of electric forklift

Abstract

The utility model relates to an automatic control device for an explosion-proof fan in a charging room of an electric fork-lift truck, and solves the problem that the fan is easy to forget to start due to manual operation when the electric fork-lift truck is charged, so that hydrogen is gathered in the charging room to cause an explosion accident. The device comprises a current sensing switch which is connected with an electric forklift charging circuit to monitor current and is connected with an explosion-proof fan control circuit. When the charging current exceeds a set value (the charging operation is started), the current sensing switch automatically starts the explosion-proof fan; and when the current is lower than a set value (charging is finished), the explosion-proof fan is automatically closed. By automatically controlling the start and stop of the fan, the hydrogen gathering risk is reduced, the charging safety is improved, the operation is convenient, the fan does not need to be manually controlled, and the potential safety hazard caused by forgetting to operate is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of electric forklift charging safety equipment, and in particular to an automatic control device for an explosion-proof fan in an electric forklift charging room. Background Technology

[0002] During the company's operation, the electric forklifts are powered by lead-acid batteries. During charging, the lead-acid batteries undergo partial water electrolysis, a process that continuously releases hydrogen gas. Hydrogen has unique physical and chemical properties; its relative density is 0.073, much lower than air, and its explosion limits are 4%-74%, with a minimum ignition energy of only 0.02 mJ. This means that if hydrogen gas accumulates in a room, it can easily cause a fire or explosion.

[0003] To ensure safety during the charging process, the company has implemented certain precautions. Explosion-proof fans with an air exchange rate of at least eight times per hour have been installed in the forklift charging room, and operators are required to turn on the fans during charging. However, in actual operation, due to the unavoidable drawbacks of manual operation, operators frequently forget to turn on the fans, which leaves a significant safety hazard in the charging room. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic control device for the explosion-proof fan in the charging room of an electric forklift, so as to solve the problem in the prior art that the fan is easily forgotten to be turned on due to manual operation, which leads to the risk of hydrogen accumulation in the charging room and causing an explosion.

[0005] This utility model adopts the following technical solution: an automatic control device for an explosion-proof fan in an electric forklift charging room, including a current sensing switch. The current sensing switch is connected to the charging circuit of the electric forklift and is used to monitor the current in the charging circuit in real time. The current sensing switch is also connected to the control circuit of the explosion-proof fan. When the current sensing switch detects that the current in the charging circuit exceeds a set value, it automatically sends an opening signal to the control circuit of the explosion-proof fan to turn on the explosion-proof fan for ventilation. When the current sensing switch detects that the current in the charging circuit is lower than the set value, it automatically sends a closing signal to the control circuit of the explosion-proof fan to turn off the explosion-proof fan.

[0006] Preferably, the current sensing switch can accurately set a current threshold for determining the start and end of charging based on the normal current fluctuation range during electric forklift charging.

[0007] Preferably, the current sensing switch is reliably electrically connected to the charging circuit and the control circuit of the explosion-proof fan to ensure normal signal transmission.

[0008] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0009] 1. This utility model automatically controls the start and stop of the explosion-proof fan, avoiding the accumulation of hydrogen gas due to operators forgetting to turn on the fan, greatly reducing the probability of fire and explosion accidents in the charging room, and improving the safety of the electric forklift charging process.

[0010] 2. This utility model eliminates the need for operators to manually turn the fan on and off, reducing the workload of manual operation and avoiding safety risks caused by human error. Attached Figure Description

[0011] Figure 1 This utility model provides an electrical schematic diagram of an automatic control device for an explosion-proof fan in an electric forklift charging room. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0013] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0014] Example 1

[0015] Please see Figure 1 This utility model provides a technical solution: an automatic control device for an explosion-proof fan in the charging room of an electric forklift, including a current sensing switch. The current sensing switch is connected to the charging circuit of the electric forklift and is used to monitor the current in the charging circuit in real time. The current sensing switch is also connected to the control circuit of the explosion-proof fan. When the current sensing switch detects that the current in the charging circuit exceeds a set value, it automatically sends an opening signal to the control circuit of the explosion-proof fan to turn on the explosion-proof fan for ventilation. When the current sensing switch detects that the current in the charging circuit is lower than the set value, it automatically sends a closing signal to the control circuit of the explosion-proof fan to turn off the explosion-proof fan.

[0016] The current sensing switch can accurately set the current threshold for determining the start and end of charging based on the normal current fluctuation range during electric forklift charging.

[0017] The current sensing switch is reliably electrically connected to the charging circuit and the control circuit of the explosion-proof fan to ensure normal signal transmission.

[0018] Working principle: 1. Device installation

[0019] Connect the current sensing switch correctly to the charging circuit of the electric forklift to ensure accurate monitoring of the current in the charging circuit; at the same time, reliably connect the current sensing switch to the control circuit of the explosion-proof fan to ensure normal signal transmission.

[0020] 2. Set current threshold

[0021] Based on the normal current range during electric forklift charging, set the current threshold in the current sensing switch. This threshold setting needs to take into account the normal fluctuation range during charging to ensure that the explosion-proof fan can be turned on promptly at the start of charging and accurately turned off at the end of charging.

[0022] 3. Test run

[0023] After installation and setup, a test run was conducted. During the charging process of the electric forklift, it was observed whether the current sensing switch could accurately control the start and stop of the explosion-proof fan based on changes in the charging current. The test results show that the fan can accurately determine the charging status and automatically start and stop according to current changes, achieving the expected results.

[0024] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An automatic control device for an explosion-proof fan in an electric forklift charging room, characterized in that, The device includes a current sensing switch connected to the charging circuit of the electric forklift for real-time monitoring of the current in the charging circuit. The current sensing switch is also connected to the control circuit of the explosion-proof fan. When the current sensing switch detects that the current in the charging circuit exceeds a set value, it automatically sends an start signal to the control circuit of the explosion-proof fan to turn on the fan for ventilation. When the current sensing switch detects that the current in the charging circuit is lower than the set value, it automatically sends a stop signal to the control circuit of the explosion-proof fan to turn off the fan.

2. The automatic control device for the explosion-proof fan in the charging room of an electric forklift according to claim 1, characterized in that: The current sensing switch can accurately set the current threshold for determining the start and end of charging based on the normal current fluctuation range during electric forklift charging.

3. The automatic control device for the explosion-proof fan in the charging room of an electric forklift according to claim 1, characterized in that: The current sensing switch is reliably electrically connected to the charging circuit and the control circuit of the explosion-proof fan to ensure normal signal transmission.

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