A ventilation fan and expansion mechanism interlocking control system and method

Abstract

The present invention relates to a ventilation fan and expansion mechanism interlocking control system and method, comprising a ventilation fan, a power supply, a PLC module, an expansion control module, a touch control module, a detection module, and an indicator light module. CAN bus control is utilized in the original ventilation fan control system, and the RS485 serial communication function of the expansion mechanism is utilized to connect the ventilation fan control and the expansion mechanism to a touch screen, respectively. Touch screen configuration software is developed for centralized control, thereby realizing the automatic interlocking control function of the two. The present invention solves the technical problem of automatic interlocking control between the ventilation fan and the expansion mechanism, thereby adding a touch screen configuration control function to the original mechanical switch control, providing a human-machine interactive interface for remote control of the ventilation fan and the expansion mechanism, and realizing the centralized control and automatic interlocking control function of the entire vehicle platform equipment.

Description

Technical Field

[0001] The present invention relates to the field of interlocking, and in particular to an interlocking control system and method for a ventilation fan and an expansion mechanism. Background Art

[0002] Domestic and international modular shelters can be broadly categorized as expanded and non-expanded. Expanded shelters provide ample operating space for field medical operations. However, when controlling expanded shelters, interference with equipment like ventilation fans must be considered to ensure proper operation and prevent damage or even more serious hazards.

[0003] When powered by a 24V DC power supply, the original expansion mechanism switch can be connected to the expansion mechanism switch via the vehicle's onboard control switch, allowing for simple on / off control of the expansion mechanism. Furthermore, the distribution box panel is equipped with a self-resetting ventilation fan switch, which allows for manual on / off control of the ventilation fan. However, improper manual operation can result in the expansion mechanism being deployed or retracted while the ventilation fan is open, potentially damaging the equipment and potentially threatening the lives of workers. The existing technology suffers from a simple structure and a single control method. Interlocking control relies solely on human judgment, resulting in low efficiency and prone to misoperation, posing a threat to workers' lives and property. It also lacks centralized control and automatic interlocking capabilities.

[0004] The present invention aims to solve the technical problem of automatic interlocking control between the ventilation fan and the expansion mechanism, so as to add centralized control and automatic interlocking functions on the basis of the original mechanical switch control, with high safety, and a computer software interface for remote control of the ventilation fan and the expansion mechanism. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a ventilation fan and expansion mechanism interlocking control system and method, which solves the technical problem of automatic interlocking control between the ventilation fan and the expansion mechanism, and adds centralized control and automatic interlocking functions on the basis of the original mechanical switch control, and has a computer software interface for remote control of the ventilation fan and the expansion mechanism.

[0006] In order to solve the above problems, the technical solutions of the present invention are as follows:

[0007] A ventilation fan and expansion mechanism interlocking control system, comprising a ventilation fan, a power supply, a PLC module, an expansion control module, a touch control module, and a detection module;

[0008] The touch control module is used to control the interlocking of the ventilation fan and the expansion mechanism, the detection of faults, the sending of the ventilation fan opening / closing instruction, and the sending of the expansion mechanism retraction / expansion instruction. The touch control module performs interlocking control on the expansion mechanism and the ventilation fan by receiving the switch status information of the expansion mechanism and the ventilation fan. When the expansion mechanism is not expanded or not expanded in place, the ventilation fan switch cannot be effectively touched. When the ventilation fan is turned on, the expansion mechanism switch cannot be effectively touched, thereby completing the interlocking function of the ventilation fan and the expansion mechanism. The PLC module includes a CAN controller for receiving the instructions and The ventilation fan's switch information is obtained, and the ventilation fan is turned on / off and the extension mechanism is retracted / expanded according to the instructions; the extension control module includes an extension motor, an extension mechanism and an RS485 communication device, the extension motor is used to expand or retract the extension mechanism, the RS485 communication device is used to receive the information output by the detection module on whether the expansion / retraction is completed, transmit the information to the touch control module, and receive the instruction of the touch control module to execute the expansion / retraction of the extension mechanism; the detection module is used to detect whether the expansion or retraction of the extension mechanism is completed, and when it is detected that the expansion or retraction is completed, the information is transmitted to the RS485 communication device.

[0009] Furthermore, the touch control module has its input end connected to the power supply, connected to the PLC module input end through the CAN bus, and connected to the RS485 communication device of the extended control module through the RS485 port; the PLC module is connected to the relay KM1, the input end of the detection module, and the extension mechanism in sequence through the CAN bus, and controls the opening and closing of the ventilation fan through the relay KM1; the extended control module is connected to the touch control module through the RS485 communication device, the input end is connected to the detection module, and the output end is connected to the extended motor; the output end of the detection module is connected to the RS485 communication device.

[0010] Furthermore, the touch screen all-in-one machine is provided with an internal register, and the internal register is used to store the switch status of the ventilation fan and the expansion mechanism, and the status of the indicator light.

[0011] Furthermore, the expansion control module is also provided with a one-touch folding button, a one-touch unfolding button and an emergency stop button.

[0012] Furthermore, the detection module includes an deployed position sensor and a retracted position sensor.

[0013] Furthermore, the control system is also provided with an indicator light module, including an expanded position indicator light, a retracted position indicator light and a fault indicator light. The indicator light module is connected to the RS485 communication device and transmits the signal to the touch control module through the RS485 communication device. The indicator light module is used to prompt the operator with the status information of the expansion mechanism.

[0014] Optionally, the touch control module is a touch screen all-in-one machine with a CAN interface and an RS485 interface, or a PLC programmable controller circuit device with both a CAN interface and an RS485 interface.

[0015] The present invention also discloses a method for interlocking control of a ventilation fan and an expansion mechanism, comprising the following steps:

[0016] 1) The expansion mechanism is unfolded, and the detection module detects whether the expansion mechanism is fully unfolded;

[0017] 2) When the detection module detects that the expansion mechanism is not fully deployed, the ventilation fan switch fails and the ventilation fan button on the touch screen cannot be effectively touched; when the detection module detects that the expansion mechanism is fully deployed, the ventilation fan switch on the touch screen can be effectively touched and the ventilation fan can operate normally;

[0018] 3) When the detection module detects that the exhaust fan is in the on state, the expansion mechanism retraction switch becomes invalid and the expansion mechanism retraction button on the touch screen cannot be effectively touched; when the detection module detects that the exhaust fan is in the off state, the expansion mechanism retraction switch on the touch screen can be effectively touched and the expansion mechanism can execute the retraction command normally.

[0019] Furthermore, when the one-touch retraction button or the one-touch deployment button is used, the ventilation fan and the expansion mechanism are automatically deployed or retracted according to the instructions of steps 1) 2) and 3).

[0020] Compared with the prior art, the advantages and positive effects of the present invention are:

[0021] 1. Solve the technical problem of automatic interlocking control between the ventilation fan and the expansion mechanism, so that on the basis of the original mechanical switch control, a touch screen configuration control function is added, and a human-machine interaction interface is provided to remotely control the ventilation fan and expansion mechanism, realizing centralized control of the entire vehicle platform equipment and automatic interlocking control functions.

[0022] 2. During operation, the software will automatically determine the status of the ventilation fan and expansion mechanism, avoiding misoperation and ensuring the safety of life and property of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Flow chart of a method for interlocking control of a ventilation fan and an expansion mechanism of the present invention

[0024] Figure 2 This is a circuit diagram of the interlocking control system of a ventilation fan and an expansion mechanism of the present invention.

[0025] Figure 3 This is the principle block diagram of the existing ventilation fan switch and expansion mechanism switch circuit

[0026] Figure 4 This is a table showing the specific correspondence between the functions of the internal registers of the touch screen and their addresses. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0030] Example 1

[0031] like Figure 1 , Figure 2 , Figure 4 As shown:

[0032] The present invention provides an interlocking control system for a ventilation fan and an expansion mechanism, comprising a ventilation fan, a power supply, a PLC module, an expansion control module, a touch control module, a detection module, and an indicator light module; the touch control module is used to control the interlocking of the ventilation fan and the expansion mechanism, the detection of faults, the sending of instructions for opening / closing the ventilation fan, and the sending of instructions for retracting / deploying the expansion mechanism; the touch control module performs interlocking control on the expansion mechanism and the ventilation fan by receiving switch status information of the expansion mechanism and the ventilation fan; when the expansion mechanism is not deployed or is not deployed in place, the ventilation fan switch cannot be effectively touched; when the ventilation fan is turned on, the expansion mechanism switch cannot be effectively touched; The PLC module includes a CAN controller for receiving instructions and ventilation fan switch information transmitted by the touch control module, and opening / closing the ventilation fan and retracting / deploying the expansion mechanism according to the instructions; the expansion control module includes an expansion motor, an expansion mechanism and an RS485 communication device, the expansion motor is used to deploy or retract the expansion mechanism, and the RS485 communication device is used to receive information output by the detection module on whether the deployment / retraction is completed, transmit the information to the touch control module, and receive the instruction of the touch control module to execute the deployment / retraction of the expansion mechanism;

[0033] The detection module is used to detect whether the expansion mechanism is fully deployed or retracted, and when it is detected that the deployment or retraction is completed, the information is transmitted to the RS485 communication device.

[0034] The touch control module has its input end connected to the power supply, connected to the PLC module input end through the CAN bus, and connected to the RS485 communication device of the extended control module through the RS485 port; the PLC module is connected to the relay KM1, the input end of the detection module, and the extension mechanism in sequence through the CAN bus, and controls the opening and closing of the ventilation fan through the relay KM1; the extended control module is connected to the touch control module through the RS485 communication device, the input end is connected to the detection module, and the output end is connected to the extended motor; the output end of the detection module is connected to the RS485 communication device.

[0035] The control system is also provided with an indicator light module, including an extended position indicator light, a retracted position indicator light and a fault indicator light. The indicator light module is connected to the RS485 communication device and transmits signals to the touch control module through the RS485 communication device. The indicator light module is used to prompt the operator with status information of the expansion mechanism.

[0036] The detection module includes an deployed position sensor and a withdrawn position sensor.

[0037] The expansion control module is also provided with a one-touch folding button, a one-touch unfolding button and an emergency stop button.

[0038] The touch control module is an all-in-one touch screen machine with a CAN interface and an RS485 interface.

[0039] The touch screen all-in-one machine is provided with an internal register, and the internal register is used to store the switch status of the ventilation fan and the expansion mechanism, and the status of the indicator light.

[0040] First, the internal registers of the touch screen all-in-one are used to store the switch status and indicator light status of the ventilation fan and the expansion mechanism respectively. The specific correspondence between the register functions and their addresses is as follows: Figure 4 As shown, secondly, by compiling a macro instruction program on the touch screen, the register address value can be read and written, and the switch status and indicator light status of the expansion mechanism and the ventilation fan can be fed back, thereby controlling the switch operation of the expansion mechanism and the ventilation fan; using the touch screen can solve the problem of a single control method; adding the judgment of the interlocking relationship between the ventilation fan and the expansion mechanism and then controlling it can realize the centralized control of the vehicle platform equipment and the automatic interlocking control function.

[0041] The "valid state" controlled by the bit is 1, which means that the "bit switch" can be effectively touched only when the address value of the "control bit" is 1. Otherwise, no matter how the "bit switch" is touched, its selected function will not be realized.

[0042] The ventilation fan is controlled through the CAN bus of the PLC module, and the extended control module uses the RS485 communication device to connect the two to the CAN port and RS485 port of the touch control module respectively. The digital communication network using the CAN interface can effectively transmit signals under long-distance conditions and in an environment with high electronic noise.

[0043] The detection module detects the status of the expansion mechanism and transmits the status information to the touch control module. In the expanded state, after the expansion mechanism is expanded into place, the touch screen receives the expansion into place signal through the RS485 port and lights up the expansion into place indicator light of the expansion mechanism. At this time, the ventilation fan switch on the touch screen can be touched to turn on the ventilation fan; when the ventilation fan is turned on, the ventilation fan indicator light lights up, and at this time the retraction button of the expansion mechanism on the touch screen becomes invalid; when the ventilation fan is turned off, the retraction switch on the touch screen can be touched, and the expansion mechanism starts to retract. The touch screen receives the retraction into place signal through the RS485 port and lights up the retraction into place indicator light of the expansion mechanism. At this time, the ventilation fan switch on the touch screen can be touched to turn on the ventilation fan; when the CAN bus detects that the expansion mechanism has a fault in the expanded or retracted state, the touch control module issues a fault command and the fault indicator light turns on.

[0044] In this embodiment, it should be additionally explained that the expansion mechanism is further provided with a one-touch retraction button, a one-touch deployment button and an emergency stop button.

[0045] Example 2

[0046] like Figure 1 、 Figure 4 As shown, the present invention provides an interlocking control system for a ventilation fan and an expansion mechanism. It is worth noting that, in this embodiment, a PLC programmable controller circuit device with both a CAN interface and an RS485 interface is used to replace the touch screen in Example 1, and the RS485 communication device in the expansion control module is connected to the PLC programmable controller circuit device with both a CAN interface and an RS485 interface. At the same time, the instruction to deploy or retract the expansion mechanism is transmitted to the RS485 communication device in the expansion control module through the PLC programmable controller circuit device with both a CAN interface and an RS485 interface.

[0047] The information on the switch status and indicator light status of the ventilation fan and expansion mechanism is stored in a PLC programmable controller circuit device with both a CAN interface and an RS485 interface, and the reading and writing of address values ​​by the macro instruction program are completed through the PLC programmable controller circuit device with both a CAN interface and an RS485 interface.

[0048] The instructions for turning on / off the ventilation fan and for retracting / deploying the expansion mechanism are issued by a PLC programmable controller circuit device having both a CAN interface and an RS485 interface.

[0049] The "valid state" controlled by the bit is 1, which means that the "bit switch" can be effectively touched only when the address value of the "control bit" is 1. Otherwise, no matter how the "bit switch" is touched, its selected function will not be realized.

[0050] The present invention also discloses a method for interlocking control of a ventilation fan and an expansion mechanism, comprising the following steps:

[0051] 1) The expansion mechanism is unfolded, and the detection module detects whether the expansion mechanism is fully unfolded.

[0052] 2) When the detection module detects that the expansion mechanism has not been fully deployed, the "fully opened" indicator light of the expansion mechanism in the touch control module is not lit, that is, the register address (LB3) is written as 0, and the value of the ventilation fan switch's bit control register address (LB1000) is 0, the ventilation fan switch fails, and the ventilation fan button in the touch screen cannot be effectively touched; when the detection module detects that the expansion mechanism is fully deployed, the "fully opened" indicator light of the expansion mechanism in the touch control module is lit, that is, the register address (LB3) is written as 1, and the value of the ventilation fan switch's bit control register address (LB1000) is 1. At this time, the ventilation fan switch in the touch screen can be effectively touched, and the ventilation fan can work normally.

[0053] 3) When the detection module detects that the exhaust fan is in the on state, the "ventilation fan" status indicator light in the touch control module is on, that is, when the value of the bit register address 6 (LB6) is equal to 1, the value of the bit control register address (LB1001) of the expansion mechanism "withdraw" bit switch is written to 0, the expansion mechanism withdrawal switch becomes invalid, and the expansion mechanism withdrawal button in the touch screen cannot be effectively touched; when the detection module detects that the exhaust fan is in the off state, the "ventilation fan" status indicator light in the touch control module is not on, that is, when the value of the bit register address 6 (LB6) is equal to 0, the value of the bit control register address (LB1001) of the expansion mechanism "withdraw" bit switch is written to 1. At this time, the expansion mechanism withdrawal switch in the touch screen can be effectively touched, and the expansion mechanism can execute the withdrawal instruction normally.

[0054] When the one-touch retraction button or the one-touch deployment button is used, the ventilation fan and the expansion mechanism are automatically deployed or retracted according to the instructions of steps 1) 2) and 3).

[0055] Specific working process: The staff can quickly and conveniently understand the open or closed status of the expansion mechanism and the ventilation fan through the indicator light, and then perform corresponding operations as needed.

[0056] The ventilation fan is in the off state by default. When the touch screen is not in use, it can be manually controlled through the ventilation fan switch and the expansion mechanism control switch installed on the distribution box. After the touch screen is powered on, when the deployment position sensor detects that the expansion mechanism is in the deployment position, the touch screen receives the deployment position signal through the RS485 port and lights up the deployment position indicator in the indicator module. At this time, the ventilation fan switch on the touch screen can be touched to turn on the ventilation fan. When the ventilation fan is turned on, the ventilation fan indicator light lights up, the value of the bit register address 6 (LB6) is equal to 1, and the value of the bit control register address (LB1001) of the expansion mechanism "withdraw" position switch is 0. At this time, the "withdraw" position switch of the expansion mechanism cannot be effectively touched, and the expansion mechanism cannot be withdrawn.

[0057] Similarly, the ventilation fan is only allowed to turn on when the expansion mechanism is fully deployed. If and only if the expansion mechanism's "fully deployed" status indicator is on, the value of the ventilation fan switch's bit control register address (LB1000) is written to 1. At this point, the ventilation fan switch can be effectively touched and the ventilation fan can turn on normally.

[0058] During operation, the user only needs to touch the corresponding switch button on the touch screen with his finger to perform the corresponding operation of the ventilation fan and expansion mechanism; at the same time, the system will automatically determine the status of the ventilation fan and expansion mechanism, and then realize the automatic interlocking control function of the ventilation fan and expansion mechanism, avoiding misoperation and protecting the life and property of the staff.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the present invention may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A ventilation fan and expansion mechanism interlocking control system, comprising a ventilation fan, a power supply, and characterized by: It also includes PLC module, expansion control module, touch control module, and detection module; The touch control module is used to control the interlocking of the ventilation fan and the expansion mechanism, fault detection, sending of ventilation fan opening / closing instructions, and sending of expansion / retraction instructions of the expansion mechanism. The touch control module performs interlocking control of the expansion mechanism and the ventilation fan by receiving switch status information of the expansion mechanism and the ventilation fan. When the expansion mechanism is not unfolded or not unfolded into place, the ventilation fan switch cannot be effectively touched. When the ventilation fan is turned on, the expansion mechanism switch cannot be effectively touched, thereby completing the interlocking function of the ventilation fan and the expansion mechanism. The touch control module is an all-in-one touch screen with a CAN interface and an RS485 interface, and is internally provided with a position control register for the ventilation fan switch and a position control register for the expansion mechanism retraction switch. The PLC module includes a CAN controller for receiving instructions transmitted by the touch control module and the switch information of the ventilation fan, and turning on / off the ventilation fan and retracting / deploying the expansion mechanism according to the instructions; The expansion control module includes an expansion motor, an expansion mechanism, and an RS485 communication device. The expansion motor is used to expand or retract the expansion mechanism. The RS485 communication device is used to receive information output by the detection module indicating whether expansion / retraction is complete, transmit the information to the touch control module, and receive instructions from the touch control module to execute expansion / retraction of the expansion mechanism. The detection module is used to detect whether the expansion mechanism has been deployed or retracted, and when it is detected that the deployment or retraction is completed, the information is transmitted to the RS485 communication device; The control register of the ventilation fan switch responds to the expansion position signal of the detection module. When the expansion mechanism is not fully expanded, the register is set to 0 to disable the ventilation fan button; when the expansion mechanism is fully expanded, the register is set to 1 to enable the ventilation fan button. The control register of the expansion mechanism withdrawal switch responds to the ventilation fan status. When the ventilation fan is turned on, the register is set to 0 to disable the expansion mechanism withdrawal button; when the ventilation fan is turned off, the register is set to 1 to enable the expansion mechanism withdrawal button.

2. The interlocking control system of the ventilation fan and the expansion mechanism according to claim 1, characterized in that: The touch control module has an input end connected to a power supply, an input end connected to a PLC module via a CAN bus, and an RS485 communication device connected to an extension control module via an RS485 port; The PLC module is connected to the relay KM1, the input end of the detection module, and the expansion mechanism in sequence through the CAN bus, and controls the opening and closing of the ventilation fan through the relay KM1; The expansion control module is connected to the touch control module via an RS485 communication device, the input end is connected to the detection module, and the output end is connected to the expansion motor; The output end of the detection module is connected to an RS485 communication device.

3. The interlocking control system of the ventilation fan and the expansion mechanism according to claim 1, characterized in that: The touch screen all-in-one machine is provided with an internal register, and the internal register is used to store the switch status of the ventilation fan and the expansion mechanism, and the status of the indicator light.

4. The interlocking control system of the ventilation fan and the expansion mechanism according to claim 1, characterized in that: The expansion control module is also provided with a one-touch folding button, a one-touch unfolding button and an emergency stop button.

5. The interlocking control system of the ventilation fan and the expansion mechanism according to claim 1, characterized in that: The detection module includes an deployed position sensor and a withdrawn position sensor.

6. The interlocking control system of the ventilation fan and the expansion mechanism according to claim 1, characterized in that: The control system is also provided with an indicator light module, including an extended position indicator light, a retracted position indicator light and a fault indicator light. The indicator light module is connected to the RS485 communication device and transmits signals to the touch control module through the RS485 communication device. The indicator light module is used to prompt the operator with status information of the expansion mechanism.

7. A method for interlocking control of the ventilation fan and expansion mechanism interlocking control system according to claim 1, characterized in that: The following steps are involved: 1) The expansion mechanism is unfolded, and the detection module detects whether the expansion mechanism is fully unfolded; 2) When the detection module detects that the expansion mechanism has not been fully deployed, the ventilation fan switch fails and the ventilation fan button on the touch screen cannot be effectively touched; When the detection module detects that the expansion mechanism is fully deployed, the ventilation fan switch on the touch screen can be effectively touched and the ventilation fan can work normally; When the detection module detects that the exhaust fan is in the on state, the expansion mechanism retraction switch becomes invalid and the expansion mechanism retraction button in the touch screen cannot be effectively touched; when the detection module detects that the exhaust fan is in the off state, the expansion mechanism retraction switch in the touch screen can be effectively touched and the expansion mechanism can execute the retraction command normally.

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