A temperature control system for exhibition halls

Abstract

This invention relates to the field of temperature control system technology, specifically a temperature control system for exhibition halls. The system includes a central processing unit, a sensor network, a group of execution devices, and a back-end user interface. The sensor network is deployed throughout the exhibition hall and sends monitoring data to the central processing unit. The execution devices are installed in the exhibition hall and controlled by the central processing unit. The central processing unit then feeds back information to the back-end user interface for display. This exhibition hall temperature control system can detect and automatically control the humidity and humidity levels within the exhibition hall through the sensor network, maintaining them within a constant range. Even when a large influx of people enters the exhibition hall, the system can proactively pre-cool the area before it reaches a point requiring cooling.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature central control systems, and in particular to a temperature central control system for an exhibition hall. Background Art

[0002] Exhibition halls are usually used to display goods and artworks, so the temperature and humidity in the exhibition halls are extremely important. Too high or too low a temperature will affect the physical comfort of exhibitors; too high humidity will increase the probability of exhibits getting moldy, and too low humidity will increase the possibility of cracking; under the existing technology, the most common thing in exhibition halls is to set up a central air-conditioning system for temperature control. A single central air-conditioning system cannot control the humidity very well, and when a large number of people suddenly pour in, the central air-conditioning system will not cool down in advance. It can only wait until the temperature in the exhibition hall rises to a certain value due to the body temperature and breathing heating of a large number of people before it triggers cooling. At this time, the peak load of the central air-conditioning system is higher, shortening the life of the central air-conditioning system. Summary of the invention

[0003] The purpose of the present invention is to provide a central temperature control system for an exhibition hall to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a central temperature control system for an exhibition hall, comprising a central processing device, a sensor network, an execution device group and a background user interface. The sensor network is arranged in the exhibition hall and sends monitoring data to the central processing device. The execution device group is installed in the exhibition hall and is controlled by the central processing device. The central processing device feeds back information to the background user interface for display. The background user interface is used to issue control instructions to the central processing device. The sensor network includes temperature sensors, humidity sensors and personnel quantity monitoring equipment. The execution device group includes a central air-conditioning system and a wet film humidification device. The temperature is controlled and the humidity is reduced by the central air-conditioning system, and the humidity is increased by the wet film humidification device. When the personnel quantity monitoring equipment detects that a large number of people have poured in per unit time, the central air-conditioning system gives priority to pre-cooling.

[0005] The wet film humidifying device includes a device chassis and a wet film bin and a fan box arranged inside the device chassis, the wet film bin and the fan box are communicated with each other, a wet film body is arranged in the wet film bin, an air outlet interface is provided on the device chassis, a fixed eaves board is provided between the air outlet interface and the wet film body, the fixed eaves board is fixedly installed on the inner wall surface of the device chassis, a water droplet arresting net is arranged in the fixed eaves board, and when the fan box is running, the driving gas passes through the wet film body and the water droplet arresting net in turn and is sprayed out from the air outlet interface, a first negative pressure box and a second negative pressure box are respectively arranged on both sides of the water droplet arresting net, the first negative pressure box and the second negative pressure box can be synchronously lifted and lowered, and a synchronous vertical groove is vertically penetrated through the surface of the fixed eaves board.

[0006] The first negative pressure box and the second negative pressure box are respectively provided with a front suction chamber, the front suction chamber is opened toward one side of the water droplet blocking net, an extrusion spring roller is rotatably arranged in the front suction chamber, and a synchronous connecting square tube is fixedly connected between the first negative pressure box and the second negative pressure box, and the synchronous connecting square tube is inserted through the synchronous vertical groove.

[0007] A first back cavity is provided in the first negative pressure box, and a second back cavity is provided in the second negative pressure box. The first back cavity and the second back cavity are connected to each other through a synchronously connected square tube. Bottom groove openings are respectively penetrated through the inner wall surfaces of the first back cavity and the second back cavity near the lower position. The first back cavity and the second back cavity are respectively connected to their corresponding suction front cavities through the bottom groove openings. A suction connecting tube is fixedly provided on the surface of the second negative pressure box, and the suction connecting tube is connected to the second back cavity.

[0008] A support roller is provided in the front suction chamber, and the support roller is located on the side of the extrusion elastic roller away from the water droplet blocking net, and the support roller is in extrusion contact with the extrusion elastic roller to support the extrusion elastic roller, and an elastic support sheet is provided on the corresponding support roller in the second negative pressure box, and a movable pressure rod is fixedly installed on the corresponding support roller in the first negative pressure box.

[0009] The lower end of the movable pressure rod is rotatably connected to a pressure rod swivel seat, and the pressure rod swivel seat is fixedly installed on the inner surface of the front suction chamber. A movable top window is penetrated through the inner upper surface of the front suction chamber. The movable pressure rod passes through the movable top window and extends to the outside of the first negative pressure box. A rubber sealing curtain is sealed between the movable pressure rod and the movable top window, and the rubber sealing curtain is elastic.

[0010] A limiting sleeve is fixedly provided on the upper surface of the first negative pressure box, and an intermediate extrusion piece is inserted and limited in the limiting sleeve. One end of the intermediate extrusion piece is pressed against the movable pressure rod, and the other end is provided with a lifting screw. When the lifting screw rotates, it can push the intermediate extrusion piece to move, so that the intermediate extrusion piece squeezes and pushes the movable pressure rod to swing around the pressure rod swivel seat.

[0011] A pushing plane is provided on the surface of the lifting screw, a fixed screw sleeve is fixedly installed on the first negative pressure box, the lifting screw passes through the fixed screw sleeve and is spirally matched with the fixed screw sleeve, and an external driver is provided at the end of the lifting screw to drive the lifting screw to rotate.

[0012] A track optical axis is fixedly arranged inside the device chassis, a limiting sleeve is fixedly arranged on the surface of the first negative pressure box, the track optical axis is limited and inserted through the limiting sleeve, a spray pipe is arranged above the wet film body, and a bottom drain pipe is arranged below the wet film body.

[0013] A masking tape winding box is respectively arranged above and below the synchronous vertical groove, and a closed masking tape is arranged in the masking tape winding box. The closed masking tape has a tendency to elastically retract into the masking tape winding box, and the upper surface and the lower surface of the synchronous connecting square tube are respectively connected and fixed to the corresponding closed masking tapes, and the closed masking tape blocks the side of the synchronous vertical groove facing the position of the wet film body, and the synchronous vertical groove is blocked and closed by the closed masking tape.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The exhibition hall temperature central control system of the present invention can detect the humidity and moisture in the exhibition hall through a sensor network, and automatically control the temperature and humidity to maintain them within a constant range; when a large number of people flock into the exhibition hall, even if the temperature in the exhibition hall has not risen to the level where cooling is required, active pre-cooling is carried out through system control to reduce the peak load of the central air-conditioning system during subsequent cooling work.

[0016] The wet film humidification device of the present invention can effectively reduce the water droplet particles in the air after humidification by means of the water droplet arresting net provided, so as to avoid water accumulation in the subsequent air duct; and the water droplet arresting net can be circulated and dewatered by means of the cooperation of the first negative pressure box, the second negative pressure box and the squeezing elastic roller provided, and the water droplet arresting net is squeezed by the squeezing elastic roller to make the adsorbed water in the water droplet arresting net overflow, and then the first negative pressure box and the second negative pressure box are used for negative pressure extraction, so as to efficiently remove the adsorbed water in the water droplet arresting net.

[0017] By cooperating with the intermediate extrusion parts, movable pressure rods and supporting rollers, the rotation of the lifting screw can be used to drive the two mutually clamped extrusion spring rollers to vibrate horizontally. The vibration makes it easier for the adsorbed water in the water droplet barrier net to separate, thereby improving the water removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the temperature central control system of the present invention.

[0019] Figure 2 It is a schematic diagram of the wet film humidification device of the present invention.

[0020] Figure 3 This is a schematic diagram of a cutaway device chassis of the wet film humidifying device of the present invention.

[0021] Figure 4 for Figure 3 A magnified schematic diagram of area A in the middle.

[0022] Figure 5 It is a three-dimensional half-section schematic diagram of the wet film humidification device of the present invention.

[0023] Figure 6 for Figure 5 Enlarged schematic diagram of area B in the middle.

[0024] Figure 7 for Figure 6 Enlarged schematic diagram of area C in the middle.

[0025] Figure 8 It is a horizontal half-section schematic diagram of the wet film humidification device of the present invention.

[0026] Fig. 9 for Figure 8 Enlarged schematic diagram of area D in the middle.

[0027] Fig.10 This is a schematic diagram of the pushing plane.

[0028] In the figure: 1, device chassis; 2, wet film bin; 3, fan box; 4, wet film body; 5, air outlet interface; 6, fixed eaves; 7, water drop blocking net; 8, first negative pressure box; 9, second negative pressure box; 10, synchronous vertical slot; 801, suction front chamber; 802, extrusion elastic roller; 803, synchronous connection square tube; 804, first back chamber; 805, second back chamber; 806, bottom slot opening; 807, suction connection pipe; 808, support roller; 809, elastic support sheet; 810, movable pressure rod; 811 , pressure rod swivel; 812, movable top window; 813, rubber closing curtain; 814, limiting sleeve; 815, intermediate extrusion piece; 816, lifting screw; 817, pushing plane; 818, fixing screw sleeve; 819, external drive; 101, track optical axis; 102, limiting sleeve; 201, spray pipe; 202, bottom drain pipe; 601, closed cover belt; 602, cover belt reel box; 11, central processing equipment; 12, sensor network; 13, execution equipment group; 14, background user interface. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention provides a technical solution: a temperature control system for an exhibition hall, such as Figure 1 As shown in , it includes a central processing device 11, a sensor network 12, an execution device group 13 and a background user interface 14. The sensor network 12 is arranged in the exhibition hall and sends the monitoring data to the central processing device 11. The central processing device 11 adopts a PLC module with communication function. The execution device group 13 is installed in the exhibition hall. The execution device group 13 is controlled by the central processing device 11. The central processing device 11 feeds back information to the background user interface 14 for display. The background user interface 14 is used to issue control instructions to the central processing device 11. The background user interface 14 can be a computer terminal. The sensor network 12 includes temperature sensors, humidity sensors and personnel quantity monitoring equipment, wherein the personnel quantity monitoring equipment can be a camera with face recognition counting, or a gate machine capable of counting.

[0031] The execution equipment group 13 includes a central air-conditioning system and a wet film humidification device. The temperature is controlled and the humidity is reduced by the central air-conditioning system, and the humidity is increased by the wet film humidification device. When the personnel number monitoring device detects that a large number of people have poured into the exhibition hall per unit time, even if the temperature in the exhibition hall has not increased to the level that requires cooling, the central processing device 11 controls the operation of the central air-conditioning system to perform active pre-cooling. At this time, the central air-conditioning system has sufficient operating time and can operate at a lower power, thereby reducing the peak load of the central air-conditioning system.

[0032] like Figure 5 As shown in the figure, the wet film humidifying device includes a device chassis 1 and a wet film bin 2 and a fan box 3 arranged inside the device chassis 1. The wet film bin 2 and the fan box 3 are connected to each other. A wet film body 4 is arranged in the wet film bin 2. An air outlet interface 5 is opened on the device chassis 1. A fixed eaves board 6 is arranged between the air outlet interface 5 and the wet film body 4. The fixed eaves board 6 is fixedly installed on the inner wall surface of the device chassis 1. A water droplet blocking net 7 is arranged in the fixed eaves board 6. The water droplet blocking net 7 can be composed of cotton mesh cloth. When the fan box 3 is running, the driving gas passes through the wet film body 4 and the water droplet blocking net 7 in turn and then is sprayed out from the air outlet interface 5. A first negative pressure box 8 and a second negative pressure box 9 are respectively arranged on both sides of the water droplet blocking net 7. The first negative pressure box 8 and the second negative pressure box 9 can be raised and lowered synchronously. A synchronous vertical groove 10 is vertically penetrated through the surface of the fixed eaves board 6.

[0033] like Figure 7 As shown in the figure, the first negative pressure box 8 and the second negative pressure box 9 are respectively provided with a suction front chamber 801, the suction front chamber 801 is opened toward one side of the water droplet blocking net 7, and a squeezing spring roller 802 is rotatably arranged in the suction front chamber 801, and a synchronous connecting square tube 803 is fixedly connected between the first negative pressure box 8 and the second negative pressure box 9, and the synchronous connecting square tube 803 is inserted through the synchronous vertical groove 10.

[0034] A first back cavity 804 is provided in the first negative pressure box 8, and a second back cavity 805 is provided in the second negative pressure box 9. The first back cavity 804 and the second back cavity 805 are connected to each other through a synchronously connected square tube 803. Bottom groove openings 806 are respectively penetrated through the inner wall surfaces of the first back cavity 804 and the second back cavity 805 near the lower position. The first back cavity 804 and the second back cavity 805 are respectively connected to their corresponding suction front cavities 801 through the bottom groove openings 806. A suction connecting tube 807 is fixedly provided on the surface of the second negative pressure box 9, and the suction connecting tube 807 is connected to the second back cavity 805.

[0035] A support roller 808 is provided in the front suction chamber 801. The support roller 808 is located on the side of the squeezing elastic roller 802 away from the water droplet blocking net 7, and the support roller 808 is in squeezing contact with the squeezing elastic roller 802 to support the squeezing elastic roller 802. An elastic support sheet 809 is provided on the corresponding support roller 808 in the second negative pressure box 9. The elastic support sheet 809 provides cooperative elastic support. A movable pressure rod 810 is fixedly installed on the corresponding support roller 808 in the first negative pressure box 8.

[0036] The lower end of the movable pressure rod 810 is rotatably connected to a pressure rod swivel seat 811, and the pressure rod swivel seat 811 is fixedly installed on the inner surface of the suction front chamber 801. A movable top window 812 is penetrated through the inner upper surface of the suction front chamber 801. The movable pressure rod 810 passes through the movable top window 812 and extends to the outside of the first negative pressure box 8. A rubber sealing curtain 813 is sealed between the movable pressure rod 810 and the movable top window 812, and the rubber sealing curtain 813 is elastic.

[0037] A limiting sleeve 814 is fixedly provided on the upper surface of the first negative pressure box 8, and an intermediate extrusion piece 815 is inserted and arranged in the limiting sleeve 814. One end of the intermediate extrusion piece 815 is pressed against the movable pressure rod 810, and the other end is provided with a lifting screw 816. When the lifting screw 816 rotates, it can push the intermediate extrusion piece 815 to move, so that the intermediate extrusion piece 815 squeezes and pushes the movable pressure rod 810 to swing around the pressure rod rotating seat 811.

[0038] The surface of the lifting screw 816 is provided with a pushing plane 817. Fig.10 As shown in , the distance from the plane of the pushing plane 817 to the axis of the lifting screw 816 is less than the length of the cross-sectional radius of the lifting screw 816. A fixed screw sleeve 818 is fixedly installed on the first negative pressure box 8, and the lifting screw 816 is inserted through the fixed screw sleeve 818 and screwed with it. An external driver 819 is provided at the end of the lifting screw 816, and the lifting screw 816 is driven to rotate by the external driver 819. The external driver 819 is composed of a motor and a reduction gear. The speed of the external driver 819 driving the lifting screw 816 should not be too high.

[0039] A track optical axis 101 is fixedly arranged inside the device chassis 1, a limiting sleeve 102 is fixedly arranged on the surface of the first negative pressure box 8, the track optical axis 101 is limitedly inserted through the limiting sleeve 102, a spray pipe 201 is arranged above the wet film body 4, and a bottom drain pipe 202 is arranged below the wet film body 4.

[0040] A masking tape reel box 602 is provided above and below the synchronous vertical slot 10, respectively. A closed masking tape 601 is provided in the masking tape reel box 602. The closed masking tape 601 has a tendency to elastically retract into the masking tape reel box 602. A reel and a spring for reeling are provided in the masking tape reel box 602. The upper and lower surfaces of the synchronously connected square tube 803 are respectively connected and fixed to the closed masking tape 601 corresponding thereto. The closed masking tape 601 blocks the side of the synchronous vertical slot 10 facing the location of the wet film body 4, and the synchronous vertical slot 10 is blocked and closed by the closed masking tape 601. Figure 4 As shown in the figure, when the synchronously connected square tube 803 moves upward, the closed masking tape 601 located above the synchronously connected square tube 803 will be automatically collected into the masking tape winding box 602, and the closed masking tape 601 located below the synchronously connected square tube 803 will be pulled out from the masking tape winding box 602 below.

[0041] When the wet film humidifying device is in use, the spray pipe 201 is connected to the water inlet pipe, and the surface of the wet film body 4 is moistened by spraying through the spray pipe 201. The fan box 3 drives the air flow to pass through the wet film body 4, and then passes through the water droplet barrier net 7 to be sprayed out from the air outlet interface 5. The air outlet interface 5 is connected with various indoor areas of the exhibition hall through the air duct.

[0042] When air passes through the wet film body 4, water molecules absorb heat in the air and vaporize into water vapor, increasing the humidity of the air; when the fan box 3 is running at high power or there are splashing water droplets in the wet film body 4, the water droplets will also be blown out by the air flow, resulting in accumulated water in the air duct; and through the setting of the water droplet blocking net 7, liquid water droplets can be blocked and adsorbed, so that gaseous water vapor can pass through the water droplet blocking net 7, so that the humidified gas output from the wind outlet 5 does not contain liquid water droplets.

[0043] The lifting screw 816 is driven by an external driver 819 to rotate in a forward and reverse cycle. The lifting screw 816 and the fixed screw sleeve 818 are screwed together to make the first negative pressure box 8 and the second negative pressure box 9 move up and down on both sides of the water droplet blocking net 7 to remove water from the water droplet blocking net 7. When working, the suction connecting pipe 807 is connected to the external negative pressure extraction equipment. Since the suction connecting pipe 807 is connected to the second back cavity 805, and the second back cavity 805 is connected to the first back cavity 804, the suction front cavity 801 is in a negative pressure suction state through the bottom groove opening 806. Figure 7 As shown in the figure, two squeezing spring rollers 802 are respectively clamped on both sides of the water droplet arresting net 7 to squeeze the water droplet arresting net 7. During the lifting and lowering activities of the first negative pressure box 8 and the second negative pressure box 9, the adsorbed water in the water droplet arresting net 7 can be squeezed out by the squeezing spring rollers 802, and then extracted and discharged by the negative pressure of the suction front chamber 801.

[0044] Since the extrusion elastic roller 802 is a cylindrical long axis with a long length, it is easy to bend elastically in the middle position. Support rollers 808 are symmetrically arranged on both sides of the middle position of the extrusion elastic roller 802 to support the back of the extrusion elastic roller 802, which can effectively reduce the bending deformation of the middle position of the extrusion elastic roller 802 during the extrusion process.

[0045] At the same time, during the rotation of the lifting screw 816, since the surface of the lifting screw 816 is provided with a pushing plane 817, when the pushing plane 817 faces the middle extrusion member 815, the middle extrusion member 815 is Figure 7 As shown in the figure, it will move to the left, and when the pushing plane 817 passes through the middle extrusion piece 815 by rotating, the middle extrusion piece 815 will be squeezed to the right, thereby pushing the movable pressure rod 810 to swing, and the movable pressure rod 810 squeezes the extrusion elastic roller 802 through the supporting roller 808; during the continuous rotation of the lifting screw 816, the movable pressure rod 810 swings back and forth, driving the two mutually clamped extrusion elastic rollers 802 to vibrate horizontally back and forth, and the vibration makes it easier for the adsorbed water in the squeezed overflow water droplet barrier net 7 to detach, thereby further improving the adsorption and water removal efficiency of the front absorption chamber 801.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temperature control system for an exhibition hall, comprising a central processing device (11), a sensor network (12), an execution device group (13) and a background user interface (14), characterized in that: The sensor network (12) is arranged in the exhibition hall and sends monitoring data to the central processing device (11). The execution device group (13) is installed in the exhibition hall and is controlled by the central processing device (11). The central processing device (11) feeds back information to the background user interface (14) for display. The background user interface (14) is used to issue control instructions to the central processing device (11). The sensor network (12) includes a temperature sensor, a humidity sensor and a personnel number monitoring device. The execution device group (13) includes The invention comprises a central air conditioning system and a wet film humidifying device, wherein the temperature is controlled and the humidity is reduced by the central air conditioning system, and the humidity is increased by the wet film humidifying device. When the personnel number monitoring device detects that a large number of people are pouring in within a unit time, the central air conditioning system performs pre-cooling first; the wet film humidifying device comprises a device chassis (1), and a wet film bin (2) and a fan box (3) arranged inside the device chassis (1); the wet film bin (2) and the fan box (3) are interconnected; a wet film body (4) is arranged in the wet film bin (2); and a fan box (3) is provided on the device chassis (1). There is an air outlet interface (5), a fixed eaves plate (6) is arranged between the air outlet interface (5) and the wet film body (4), the fixed eaves plate (6) is fixedly installed on the inner wall surface of the device chassis (1), and a water drop blocking net (7) is arranged in the fixed eaves plate (6). When the fan box (3) is running, the driving gas passes through the wet film body (4) and the water drop blocking net (7) in sequence and then is sprayed out from the air outlet interface (5), and a first negative pressure box (8) and a second negative pressure box (9) are respectively arranged on both sides of the water drop blocking net (7). The first negative pressure box (8) and the second negative pressure box (9) (9) capable of synchronous lifting and lowering movements, a synchronous vertical groove (10) is vertically penetrated through the surface of the fixed eaves plate (6); a suction front chamber (801) is respectively opened in the first negative pressure box (8) and the second negative pressure box (9), the suction front chamber (801) is opened toward one side of the water drop blocking net (7), and a squeezing elastic roller (802) is rotatably arranged in the suction front chamber (801); a synchronous connecting square tube (803) is fixedly connected between the first negative pressure box (8) and the second negative pressure box (9), and the synchronous connecting square tube (803) is inserted through the synchronous vertical groove (10).

2. The exhibition hall temperature central control system according to claim 1 is characterized by: A first back cavity (804) is provided in the first negative pressure box (8), and a second back cavity (805) is provided in the second negative pressure box (9). The first back cavity (804) and the second back cavity (805) are connected to each other via a synchronously connected square tube (803). Bottom groove openings (806) are respectively penetrated through the inner wall surfaces of the first back cavity (804) and the second back cavity (805) near the lower position. The first back cavity (804) and the second back cavity (805) are connected to their corresponding suction front cavities (801) via the bottom groove openings (806). A suction connecting tube (807) is fixedly provided on the surface of the second negative pressure box (9), and the suction connecting tube (807) is connected to the second back cavity (805).

3. The exhibition hall temperature central control system according to claim 2 is characterized by: A support roller (808) is provided in the front suction chamber (801), and the support roller (808) is located on a side of the squeezing elastic roller (802) away from the water drop blocking net (7), and the support roller (808) is in squeezing contact with the squeezing elastic roller (802) to support the squeezing elastic roller (802), and an elastic support sheet (809) is provided on the corresponding support roller (808) in the second negative pressure box (9), and a movable pressure rod (810) is fixedly installed on the corresponding support roller (808) in the first negative pressure box (8).

4. The exhibition hall temperature central control system according to claim 3 is characterized by: The lower end of the movable pressure rod (810) is rotatably connected to a pressure rod rotating seat (811), and the pressure rod rotating seat (811) is fixedly installed on the inner surface of the suction front chamber (801). A movable top window (812) is penetrated through the inner upper surface of the suction front chamber (801), and the movable pressure rod (810) is inserted through the movable top window (812) and extends to the outside of the first negative pressure box (8). A rubber sealing curtain (813) is sealed between the movable pressure rod (810) and the movable top window (812), and the rubber sealing curtain (813) is elastic.

5. The exhibition hall temperature central control system according to claim 4 is characterized by: A limiting sleeve (814) is fixedly provided on the upper surface of the first negative pressure box (8), and an intermediate extrusion piece (815) is interspersed in the limiting sleeve (814). One end of the intermediate extrusion piece (815) is pressed against the movable pressure rod (810), and the other end is provided with a lifting screw (816). When the lifting screw (816) rotates, it can push the intermediate extrusion piece (815) to move, so that the intermediate extrusion piece (815) squeezes and pushes the movable pressure rod (810) to swing around the pressure rod rotating seat (811).

6. The exhibition hall temperature central control system according to claim 5 is characterized by: The surface of the lifting screw (816) is provided with a pushing plane (817), and a fixing screw sleeve (818) is fixedly installed on the first negative pressure box (8), and the lifting screw (816) is inserted through the fixing screw sleeve (818) and screw-matched therewith, and an external driver (819) is provided at the end of the lifting screw (816), and the lifting screw (816) is driven to rotate by the external driver (819).

7. The exhibition hall temperature central control system according to claim 1 is characterized by: A track optical axis (101) is fixedly arranged inside the device chassis (1), a limiting shaft sleeve (102) is fixedly arranged on the surface of the first negative pressure box (8), the track optical axis (101) is limitedly inserted through the limiting shaft sleeve (102), a spray pipe (201) is arranged above the wet film body (4), and a bottom drain pipe (202) is arranged below the wet film body (4) in communication.

8. The exhibition hall temperature central control system according to claim 1 is characterized by: A masking tape reel box (602) is provided above and below the synchronous vertical slot (10), respectively. A closed masking tape (601) is provided in the masking tape reel box (602). The closed masking tape (601) has a tendency to elastically retract into the masking tape reel box (602). The upper surface and the lower surface of the synchronous connecting square tube (803) are respectively connected and fixed to the corresponding closed masking tape (601). The closed masking tape (601) blocks the side of the synchronous vertical slot (10) facing the location of the wet film body (4), and the synchronous vertical slot (10) is blocked and closed by the closed masking tape (601).

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