CN215809195U - Multi-loop control manual operation box and ventilation control system - Google Patents

Abstract

The utility model discloses a multi-loop control manual operation box and a ventilation control system. The multi-loop control manual operation box comprises a cabinet body and at least two manual operation box modules located in the cabinet body, each manual operation box module comprises an operation display function board and an intelligent function unit, the operation display function board is connected with the intelligent function unit, the operation display function board comprises a plurality of hole sites, the hole sites are used for setting switches, one or more of buttons and indicator lamps, the intelligent function units are used for receiving operation control commands and feeding the operation control commands back to the ring control electric control cabinet, the multi-loop control manual operation box further comprises a communication interface, the intelligent function units are connected with the communication interface, and the communication interface is used for being connected with the ring control electric control cabinet through a bus. The multi-loop control manual operation box provided by the embodiment of the utility model reduces the field construction cables, reduces the construction difficulty, also enables the operation and maintenance to be more convenient, and solves the problems of more and complicated wire harnesses, high construction difficulty, high cost, high field fault maintenance difficulty and the like in the prior art.

Description

Multi-loop control manual operation box and ventilation control system

Technical Field

The embodiment of the utility model relates to the technical field of control, in particular to a multi-loop control manual operation box and a ventilation control system.

Background

Most buildings with underground layers, such as underground layers of urban subways and sunken markets and the like need a large number of ventilation and air-conditioning equipment, and in order to perform centralized management and control on the ventilation and air-conditioning equipment, a ring-control electric control room is generally arranged, and the ventilation and air-conditioning equipment such as various fans, air valves, water pumps and the like is supplied with power through a ring-control electric control cabinet. For the control mode of the environmental control equipment, three control modes are generally adopted, namely, 1, local control is adopted, and the equipment is controlled through a local control box on site, namely, the equipment is controlled through a manual control box which is usually called; 2. the environment control is carried out, and equipment is controlled in a control mode of an environment control electric control cabinet; 3. and the remote control is connected with intelligent control equipment on the ring control electric control cabinet by the BAS system in a communication mode to control the equipment.

The on-site control mode is characterized in that a manual operation box is connected with a secondary electric control loop of the environment-controlled electric control cabinet in a hard-wired mode at present, control and state display are carried out in a remote button and indicator lamp mode, the manual operation box is mostly used by maintenance operators during equipment maintenance, and the scheme in the hard-wired mode at present has the following problems: 1. the secondary cables are more, and the investment cost is high; 2. the number of field wire harnesses is large, and the construction difficulty is high; 3. the line is complicated, the difficulty of field fault maintenance is high, and the like; 4. the field distribution is disordered, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a multi-loop control manual operation box and a ventilation control system, which aim to solve the problems.

In a first aspect, an embodiment of the present invention provides a multi-loop control hand-operated box, including:

the manual operation box comprises a cabinet body and at least two manual operation box modules positioned in the cabinet body;

the manual operation box module comprises an operation display function board and an intelligent function unit, and the operation display function board is connected with the intelligent function unit; the operation display function board comprises a plurality of hole sites, and the hole sites are used for arranging one or more of switches, buttons and indicator lamps; the intelligent functional unit is used for receiving an operation command and feeding the operation command back to the environment-controlled electric control cabinet;

the multi-loop control manual operation box further comprises a communication interface, the intelligent functional unit is connected with the communication interface, and the communication interface is used for being connected with the environment-controlled electric control cabinet through a bus.

Optionally, the intelligent function units of a plurality of the manual box modules are connected in series.

Optionally, the bus comprises a Profinet bus, a DeviceNet bus or a CC-Link bus.

Optionally, the multi-loop control hand box further comprises an internal connection terminal, and the operation display function board and the intelligent function unit are connected through the internal connection terminal.

Optionally, the multi-loop control manual operation box further comprises a power interface, the power interface is connected with the intelligent functional unit, and the power interface is used for accessing an external power supply.

Optionally, the multi-loop control manual operation box further comprises a built-in power supply;

the built-in power supply is respectively connected with the power interface and the intelligent functional unit.

Optionally, the cabinet body still is provided with the mounting panel, be provided with the baffle on the mounting panel, it passes through to control the function board baffle and fix with screw on the mounting panel.

Optionally, the suitcase module further includes a label, and the label covers the screw.

In a second aspect, an embodiment of the present invention further provides a ventilation control system, including an environmental control electric control cabinet and any one of the multi-loop control hand-operated boxes in the first aspect;

and the multi-loop control manual operation box is connected with the environment-controlled electric control cabinet.

Optionally, the ventilation control system comprises a plurality of multi-circuit control hand boxes;

and the multiple multi-loop control hand boxes are connected through a bus.

According to the multi-loop control hand box provided by the embodiment of the utility model, at least two hand box modules are arranged in one cabinet body, so that the multi-loop control hand box is realized, and a plurality of hand box modules in any area can be combined in one cabinet body, so that the multi-loop control hand box is connected with the environmental control equipment in a multi-loop communication control mode, and centralized unified operation management is realized. Meanwhile, the intelligent functional unit is connected with the ring control electric control cabinet through the bus by arranging the communication interface, so that the intelligent functional unit is connected with the ring control electric control cabinet, the field construction cable and the construction difficulty are saved, the operation and maintenance are more convenient, and the problems of multiple and complex wire harnesses, high construction difficulty, high investment cost, high field fault maintenance difficulty and the like in the prior art are solved.

Drawings

Fig. 1 is an external structural schematic diagram of a multi-loop control hand box according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the first hand console module of FIG. 1;

FIG. 3 is an enlarged schematic view of the second hand box module of FIG. 1;

fig. 4 is an enlarged schematic view of a third hand box module of fig. 1;

fig. 5 is an enlarged schematic view of a fourth hand box module of fig. 1;

FIG. 6 is a schematic diagram of an internal structure of a multi-circuit control hand-operated box according to an embodiment of the present invention;

FIG. 7 is a schematic view of a partial structure of a multi-circuit control hand box according to an embodiment of the present invention;

FIG. 8 is a schematic partial structure diagram of another multi-circuit control hand box according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a ventilation control system according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is an external structural schematic diagram of a multi-circuit control hand box according to an embodiment of the present invention, fig. 2 is an enlarged structural schematic diagram of a first hand box module in fig. 1, fig. 3 is an enlarged structural schematic diagram of a second hand box module in fig. 1, fig. 4 is an enlarged structural schematic diagram of a third hand box module in fig. 1, fig. 5 is an enlarged structural schematic diagram of a fourth hand box module in fig. 1, and fig. 6 is an internal structural schematic diagram of a multi-circuit control hand box according to an embodiment of the present invention, as shown in fig. 1 to 6, the multi-circuit control hand box according to an embodiment of the present invention includes a cabinet 10 and at least two hand box modules 11 located in the cabinet 10, the hand box module 11 includes a console 111 and an intelligent function unit 112, and the console 111 and the intelligent function unit 112 are connected. The operation and display function board 111 includes a plurality of hole sites 12, the hole sites 12 are used for setting one or more of a switch 121, a button 122 and an indicator light 123, and the intelligent function unit 112 is used for receiving an operation and control command and feeding the operation and control command back to the environmental control electric control cabinet (not shown in the figure). The multi-loop control hand box further comprises a communication interface 13, the intelligent function unit 112 is connected with the communication interface 13, and the communication interface 13 is used for being connected with the ring control electric control cabinet through a bus 14.

For example, as shown in fig. 1-6, the cabinet 10 is used to house various functional modules in a multi-circuit control console box for protection. The cabinet 10 may be made of a conventional cold-rolled steel plate, a stainless steel plate or a polycarbonate material, and the highest protection level may reach IP65, and those skilled in the art may set the cabinet 10 according to actual needs, which is not limited in the embodiment of the present invention.

With reference to fig. 1 to 6, the manual box modules 11 correspond to the ventilation air-conditioning equipment one by one, the manual box modules 11 are in communication connection with a ring-control electric control cabinet (not shown in the figure), and are configured to receive control commands such as start and stop, and feed back the control commands such as start and stop to the ring-control electric control cabinet, and the ring-control electric control cabinet performs control processing on the ventilation air-conditioning equipment corresponding to the manual box modules 11 according to the control commands.

Specifically, as shown in fig. 1 to 6, the console module 11 includes an operation and display function board 111 and an intelligent function unit 112, which are connected to each other, the operation and display function board 111 includes a plurality of holes 12, and the holes 12 are used for setting one or more of a switch 121, a button 122 and an indicator light 123, wherein the switch 121 and the button 122 can be used for a service operator to input an operation command, and the indicator light 123 can be used for displaying an operation state of the ventilation and air conditioning equipment corresponding to the console module 11. The operation and display function board 111 should be generally provided with various buttons or indicator lights for starting, stopping, and failure, and the skilled person can set the hole site 12 according to actual requirements, which is not limited in the embodiment of the present invention.

An overhaul operator inputs an operation command through a switch 121 or a button 122 on the operation and display function board 111, the intelligent function unit 112 is used for reading the operation command input on the operation and display function board 111 and feeding the operation command back to the ring control electric control cabinet, and the ring control electric control cabinet controls and processes the ventilation and air conditioning equipment corresponding to the hand box module 11 according to the operation command, so that on-site start-stop control of the ventilation and air conditioning equipment by the hand box module 11 is realized.

Optionally, the intelligent function unit 112 is further configured to receive running state information of the ventilation air-conditioning equipment transmitted from the environmental control electric control cabinet, and control the indicator lamp 123 on the operation and display function board 111 to indicate according to the running state information, so that the maintenance operator can know the running state of the ventilation air-conditioning equipment corresponding to the console module 11 conveniently.

With continued reference to fig. 1-6, in the present embodiment, by providing at least two glove box modules 11 in one cabinet 10, a multi-loop control glove box is implemented, and multiple glove box modules 11 in any area can be combined in one cabinet 10, thereby implementing centralized unified operation management.

The number of the manual box modules 11 may be set according to actual requirements, for example, 2 to 4 manual box modules are set, and the number is not limited in the embodiment of the present invention.

As shown in fig. 1 to 6, for example, the multi-loop control suitcase includes four suitcase modules 11, the four suitcase modules 11 are respectively a first suitcase module 21, a second suitcase module 22, a third suitcase module 23 and a fourth suitcase module 24, the first suitcase module 21 includes a first display function board 1111 and a first smart function unit 1121 which are connected to each other, the second suitcase module 22 includes a second display function board 1112 and a second smart function unit 1122 which are connected to each other, the third suitcase module 23 includes a third display function board 1113 and a third smart function unit 1123 which are connected to each other, and the fourth suitcase module 24 includes a fourth display function board 1114 and a fourth smart function unit 1124 which are connected to each other. The first handheld module 21 may be a combined air conditioner box and a return exhaust fan handheld module, the second handheld module 22 may be a double-speed fan handheld module, the third handheld module 23 may be a freezing and cooling water pump and a cooling tower handheld module, and the fourth handheld module 24 may be a combined air door (electric valve) handheld module, but is not limited thereto, and a person skilled in the art may set the ventilation and air conditioning equipment corresponding to each handheld module 11 according to actual requirements.

With continued reference to fig. 1-6, illustratively, the first operating function board 1111 of the first handheld box module 21 is provided with a switch 121 (selection switch: stop remote on site), seven indicator lights 123 (motor overload, inverter fault, inverter ready, inverter stop, inverter running, power frequency stop, power frequency running) and two buttons 122 (power on, power off); the second display function board 1112 of the second console module 22 is provided with a switch 121 (selection switch: stop on site remote), four indicator lights 123 (failure, high speed, low speed, stop) and three buttons 122 (stop, high speed, low speed); the third operation and display function board 1113 of the third console module 23 is provided with a switch 121 (selection switch: stop remote on site), four indicator lights 123 (fault, preparation, power on, power off) and two buttons 122 (power on, power off); the fourth operation function board 1114 of the fourth hand box module 24 is provided with a switch 121 (selection switch: stop remote on site), three indicator lights 123 (full on, full off, overload) and two buttons 122 (full on, full off), but the utility model is not limited thereto, and a person skilled in the art can set the hole sites 12 on each operation function board according to actual requirements, and the utility model is not limited thereto.

With continued reference to fig. 1-6, the multi-loop control manual operation box includes a communication interface 13, the intelligent function unit 112 is connected to the communication interface 13, and the communication interface 13 is connected to the environmental control electric control cabinet through the bus 14, so as to connect the intelligent function unit 112 to the environmental control electric control cabinet, thereby saving the on-site construction cable and the construction difficulty, and making the operation and maintenance thereof more convenient.

Alternatively, the smart functional unit 112 may employ a customized communication functional module, such as a remote I/O or PLC, so as to cooperate with the operation and display function board 111 to implement the functions of inputting and communicating the operation command and indicating the operation status.

The number of the hole sites 12 on the operating and displaying function board 111 may be set according to actual requirements, for example, 10 hole sites 12 are provided on each operating and displaying function board 111, so that a selection switch, a button, an indicator light, etc. of 10 hole sites may be installed at the maximum, and on-site start-stop control and operation state display requirements of different ventilation air-conditioning equipment may be met.

Optionally, the operation and display function board 111 may be made of a pressed polycarbonate film, and has high strength, high temperature resistance and corrosion resistance.

According to the multi-loop control hand-operated box provided by the embodiment of the utility model, at least two hand-operated box modules 11 are arranged in one cabinet body 10, so that the multi-loop control hand-operated box is realized, a plurality of hand-operated box modules 11 in any area can be combined in one cabinet body 10, and thus the multi-loop control hand-operated box is connected with an environment control device in a multi-loop communication control mode, and centralized unified operation management is realized. Meanwhile, the communication interface 13 is connected with the ring control electric control cabinet through the bus 14, so that the connection between the intelligent functional unit 112 and the ring control electric control cabinet is realized, the on-site construction cable and the construction difficulty are saved, the operation and maintenance are more convenient, and the problems of multiple and complex wire harnesses, high construction difficulty, high input cost, high on-site fault maintenance difficulty and the like in the prior art are solved.

With continued reference to fig. 1-6, optionally, a plurality of intelligent functional units 112 of the tote module 11 are connected in series.

The intelligent function units 112 of the plurality of hand-operated box modules 11 in the multi-loop control hand-operated box are connected in series, and the plurality of hand-operated box modules 11 can be connected by only one communication cable, so that the number of the communication cables is reduced, the connection is simple, and the cost is reduced.

For example, as shown in fig. 1 to 6, the communication interface 13 includes an input interface 131 and an output interface 132, the input interface 131 is used for communication access, the output interface 132 is used for communication access, the intelligent function units 112 of the multiple hand box modules 11 are connected with the input interface 131 and the output interface 132 in a hand-pulling manner, wherein the input interface 131 may be connected with an upper communication manager or a switch through a bus 14, the output interface 132 may be connected with a next group of multi-loop control hand boxes through the bus 14, and the number of the intelligent function units 112 that can be connected to each bus 14 may be 2 to 50, thereby ensuring a data transmission rate.

Optionally, the bus 14 includes a Profinet bus, a DeviceNet bus, or a CC-Link bus.

The bus 14 may be selected from several bus communication forms commonly used in the market, such as Profinet, DeviceNet, CC-Link, etc., to improve the versatility, but not limited thereto, and in other embodiments, a customized module scheme may be adopted to solve different application schemes.

With reference to fig. 6, optionally, the multi-circuit control hand box according to the embodiment of the present invention further includes an internal connection terminal 15, and the operation function board 111 and the smart function unit 112 are connected through the internal connection terminal 15.

Wherein, through setting up internal connection terminal 15, it all connects through internal connection terminal 15 to handle and show function board 111 and intelligent function unit 112 to accessible plug mode is to handling and showing function board 111 and intelligent function unit 112 and dismantling the change, and the relation of connection is directly perceived, and easy operation has reduced the on-the-spot trouble shooting degree of difficulty.

With reference to fig. 6, optionally, the multi-loop control hand box according to the embodiment of the present invention further includes a power interface 16, where the power interface 16 is connected to the intelligent function unit 112, and the power interface 16 is used for accessing an external power source.

Wherein, by providing the power interface 16, an external power source (not shown in the figure) is connected through the power interface 16, so as to supply power to the intelligent function unit 112.

With reference to fig. 6, optionally, the multi-circuit control hand box according to the embodiment of the present invention further includes an internal power supply 17, and the internal power supply 17 is connected to the power interface 16 and the intelligent function unit 112 respectively.

The intelligent functional unit 112 is provided with the built-in power supply 17 in the cabinet body 10, so that the normal operation of the multi-loop control hand-operated box can be ensured during power failure.

It should be noted that the power supply voltages of the external power supply and the built-in power supply 17 can be set according to the actual requirements of the intelligent function unit 112, for example, the power supply voltage is set to 24V, and whether the power supply needs to be built-in or not can be considered according to the communication requirements, which is not limited in the embodiment of the present invention.

Fig. 7 is a schematic partial structure diagram of a multi-loop control hand-operated box according to an embodiment of the present invention, and fig. 8 is a schematic partial structure diagram of another multi-loop control hand-operated box according to an embodiment of the present invention, as shown in fig. 7 and fig. 8, optionally, the cabinet body 10 is further provided with a mounting plate 101, a baffle plate 102 is arranged on the mounting plate 101, and the operation and display function plate 111 is fixed on the mounting plate 101 through the baffle plate 102 and a screw 103.

For example, as shown in fig. 7 and 8, the baffle plate 102 may be located at the bottom of the operation and display function plate 111, the screw 103 is located at the top of the operation and display function plate 111, the baffle plate 102 and the screw 103 cooperate with each other to fix the operation and display function plate 111 on the mounting plate 101, and by adopting the structure, the operation and display function plate 111, the intelligent function unit 112, and the like can be detached and replaced without opening the cover plate of the cabinet 10 during maintenance, thereby improving the maintenance efficiency.

With continued reference to fig. 1-8, optionally, the cage module 11 further includes a label 18, the label 18 covering the screw 103.

The label 18 may be disposed on the operation and display function board 111, and is used for marking the ventilation and air conditioning equipment corresponding to the manual operation box module 11, so as to facilitate the maintenance of the maintenance operator; meanwhile, the label 18 is arranged to cover the screw 103, so that the screw 103 is shielded, and the appearance of the multi-loop control manual operation box is neat and elegant.

It should be noted that, a person skilled in the art may also set other structures of the multi-circuit control manual operation box according to actual requirements, for example, as shown in fig. 1 to 8, a label 19 may also be set on the operation and display function board 111, so as to indicate functions of the switch 121, the button 122, and the indicator light 123, so as to facilitate the maintenance of the maintenance operator; optionally, the operation and display function board 111 may further be provided with a frame 30, so as to play a role in fixing and decorating; optionally, the multi-loop control manual operation box may further include a transparent cabinet door 31, the transparent cabinet door 31 may protect the internal device structure while not shielding the operation and display function board 111, and meanwhile, a door LOCK (LOCK) may be further disposed on the transparent cabinet door 31, so as to prevent a non-maintenance operator from performing a misoperation, and the number of the transparent cabinet doors 31 may be 1 or 2, which is not limited in the embodiment of the present invention.

Based on the same inventive concept, an embodiment of the present invention further provides a ventilation control system, fig. 9 is a schematic structural diagram of the ventilation control system provided in the embodiment of the present invention, and as shown in fig. 9, the ventilation control system includes a ring-control electric control cabinet 40 and a multi-loop control hand box 41 according to any embodiment of the present invention, and the multi-loop control hand box 41 is connected to the ring-control electric control cabinet 40, so that the ventilation control system provided in the embodiment of the present invention has the technical effects of the technical solutions in any embodiment, and the explanations of the structures and terms that are the same as or corresponding to those in the above embodiments are omitted.

With continued reference to fig. 9, in the alternative, the ventilation control system provided by the embodiment of the present invention includes a plurality of multi-circuit control hand boxes 41, and the plurality of multi-circuit control hand boxes 41 are connected by a bus.

The type and number of the multi-circuit control hand boxes 41 can be set according to actual requirements, and for example, as shown in fig. 9, the ventilation control system includes 4 double-circuit control hand boxes provided with 2 hand box modules 11, and 2 four-circuit control hand boxes provided with 4 hand box modules 11. Optionally, the ventilation control system may further include an existing single-circuit control hand box 42, which is not limited in the embodiments of the present invention.

With continued reference to fig. 9, optionally, the glove box modules 11 in the multi-loop control glove box 41 may be connected to an upper communication manager (not shown) or the switch 43 in a bus connection manner to connect to the ring-control electric control cabinet 40 through the upper communication manager (not shown) or the switch 43, wherein a plurality of multi-loop control glove boxes 41 are connected in series, and each bus may connect to less than 50 or 50 glove box modules 11 to ensure a data transmission rate.

With reference to fig. 9, optionally, the environmental control electrical cabinet 40 is connected to the ventilation air conditioning equipment 44 through a primary loop, an operation operator inputs an operation command through the multi-loop control manual box 41, the multi-loop control manual box 41 feeds the operation command back to the environmental control electrical cabinet, and the environmental control electrical cabinet 40 performs control processing on the ventilation air conditioning equipment 44 corresponding to the multi-loop control manual box 41 according to the operation command, so as to implement local start-stop control of the ventilation air conditioning equipment 44 by the multi-loop control manual box 41.

Optionally, the multi-loop control hand box 41 is further configured to receive the operation state information of the ventilation and air-conditioning equipment 44 transmitted from the environmental control electrical cabinet 40, and perform indication according to the operation state information, so that the maintenance operator can know the operation state of the ventilation and air-conditioning equipment 44 corresponding to the multi-loop control hand box 41 conveniently.

As shown in fig. 9, the ventilation and air conditioning equipment 44 may include a chiller, a smoke exhaust fan, a combined air conditioner, a two-speed fan, a combined air door, etc., which may be set by those skilled in the art according to actual needs, and the present invention is not limited thereto.

It should be noted that other functional modules of the ventilation control system can be set by those skilled in the art according to actual needs, and illustratively, as shown in fig. 9, the ventilation control system further includes an FAS intelligent remote station 45, an IBP disk intelligent remote station 46 and a monitoring computer 47, which can be set in a station control room 48.

With continued reference to fig. 9, optionally, the ventilation control system further includes devices disposed in the a-side ring control electronic control room 49 and the B-side ring control electronic control room 50, where the a-side ring control electronic control room 49 and the B-side ring control electronic control room 50 are provided with the ring control electronic control cabinet 40, the switch 43, and the intelligent low voltage cabinet 51, and a part of the switches 43 in the a-side ring control electronic control room 49 and the B-side ring control electronic control room 50 and a part of the switches 43 in the station control room 48 form a redundant ring network.

With continued reference to fig. 9, optionally, the ventilation control system may further include an intelligent remote station 52 or the like, which is not limited by the embodiment of the utility model.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A multi-loop control hand box is characterized by comprising:

the manual operation box comprises a cabinet body and at least two manual operation box modules positioned in the cabinet body;

the manual operation box module comprises an operation display function board and an intelligent function unit, and the operation display function board is connected with the intelligent function unit; the operation display function board comprises a plurality of hole sites, and the hole sites are used for arranging one or more of switches, buttons and indicator lamps; the intelligent functional unit is used for receiving an operation command and feeding the operation command back to the environment-controlled electric control cabinet;

the multi-loop control manual operation box further comprises a communication interface, the intelligent functional unit is connected with the communication interface, and the communication interface is used for being connected with the environment-controlled electric control cabinet through a bus.

2. The multi-circuit control hand box of claim 1,

the intelligent function units of the manual box modules are connected in series.

3. The multi-circuit control hand box of claim 1,

the bus includes a Profinet bus, a DeviceNet bus, or a CC-Link bus.

4. The multi-circuit control hand box of claim 1,

the multi-loop control hand operation box further comprises an internal connecting terminal, and the operation display function board is connected with the intelligent function unit through the internal connecting terminal.

5. The multi-circuit control hand box of claim 1,

the multi-loop control hand operation box further comprises a power supply interface, the power supply interface is connected with the intelligent function unit, and the power supply interface is used for being connected with an external power supply.

6. The multi-circuit control hand box of claim 5,

the multi-loop control manual operation box also comprises a built-in power supply;

the built-in power supply is respectively connected with the power interface and the intelligent functional unit.

7. The multi-circuit control hand box of claim 1,

the cabinet body still is provided with the mounting panel, be provided with the baffle on the mounting panel, it passes through to control the function board baffle and fix with screw on the mounting panel.

8. The multi-circuit control hand box of claim 7,

the suitcase module also includes a label that covers the screw.

9. A ventilation control system comprising an environmental control electric cabinet and a multi-circuit control hand box according to any one of claims 1 to 8;

and the multi-loop control manual operation box is connected with the environment-controlled electric control cabinet.

10. The ventilation control system of claim 9,

the ventilation control system comprises a plurality of multi-loop control hand boxes;

and the multiple multi-loop control hand boxes are connected through a bus.

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