Intelligent maintenance system for central air conditioner

Abstract

The invention provides an intelligent maintenance system for a central air conditioner, and relates to the technical field of central air conditioners. Five groups of louver boards are mounted on the fresh air collecting frame through bearings, the left ends of the five groups of louver boards are movably connected with a linkage plate, and the insect-proof net primary filter assembly comprises a shell seat and a filter plate; according to the invention, the pressure difference alarm switch is electrically connected with the controller, the blockage condition of the filter can be monitored in real time, once the pressure difference exceeds a set threshold value, the controller starts a cleaning program, high-pressure gas rushes to the primary filter through the opened electromagnetic pneumatic valve, impurities on a filter screen are removed, and the filtering performance of the filter is recovered; when the outdoor temperature is lower than a set value, the controller can automatically close a water supply device and a water drainage device of the water coil pipe, open electromagnetic valves of an exhaust port and a water drainage port of the coil pipe, start an air pump to conduct purging and water drainage operation, purge the interior of the water coil pipe through high-pressure air, ensure that no water remains, and avoid frost crack accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of central air conditioners, and in particular to an intelligent maintenance system for central air conditioners. Background Art

[0002] In today's society, with the accelerated advancement of urbanization and the significant improvement of people's living standards, the requirements for the comfort of indoor environment are becoming increasingly stringent. With its powerful cooling and heating capabilities and large-area air conditioning functions, central air-conditioning systems have been widely used in various commercial buildings, industrial sites and high-end residences, becoming a key component of modern building environment control systems. It can not only accurately control the indoor temperature, but also adjust the humidity, air circulation speed and air quality to a certain extent, creating a relatively stable and comfortable indoor space for people. Whether in hot summer or cold winter, users can enjoy a suitable indoor environment, which greatly improves people's quality of life and work efficiency. However, although the central air-conditioning system has brought many conveniences, a series of maintenance problems exposed in its long-term operation process cannot be ignored. The traditional maintenance mode seems to be powerless in the face of these complex problems. There is an urgent need for a more advanced, intelligent and efficient maintenance solution to meet these challenges, so as to ensure that the central air-conditioning system can operate continuously and stably and give full play to its due role, so a central air-conditioning intelligent maintenance system is designed.

[0003] In the ventilation link, the existing central air-conditioning fresh air collection device has obvious defects. With the increase of usage time, impurities such as dust and particulate matter in the air will gradually adhere to components such as louvers. Due to the lack of an effective self-cleaning mechanism, these dust deposits continue to accumulate, eventually leading to blockage of the ventilation channel, seriously hindering the smooth inflow of fresh air, causing the indoor air quality to decline and failing to meet people's demand for fresh air. At the same time, it also reduces the heat exchange efficiency of the entire central air-conditioning system and increases energy consumption. In addition, the existing central air-conditioning system lacks effective drainage measures and mechanisms, and cannot ensure that the flowing water in the water coil is completely drained. The residual water will freeze and expand at low temperatures, which may cause damage such as pipe rupture and deformation. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a central air-conditioning intelligent maintenance system to solve the problems mentioned in the above background technology.

[0005] In a first aspect, the present disclosure provides a central air-conditioning intelligent maintenance system, specifically comprising: a fresh air collection frame; Five groups of louver plates are installed on the new style air intake frame through bearings. A linkage plate is movably connected to the left ends of the five groups of louver plates. Two mounting plates are installed on the right end of the new style air intake frame through bolts. Rail plates are installed on both of the two mounting plates through bolts. Further included are: An insect-proof net primary filter assembly, which selects a plate type primary filter. The insect-proof net primary filter assembly is installed in the air inlet passage. The insect-proof net primary filter assembly includes a housing base and a filter plate. The housing base is snap-fitted in the air inlet passage. The filter plate is installed inside the housing base. The housing base is made of stainless steel material. The filter plate is filled with activated carbon material; A fresh air unit, which is connected with an air conditioner return water pipe, an air conditioner supply water pipe and a condensate drain pipe. The air inlet end of the fresh air unit is connected to the air inlet passage.

[0006] In at least some embodiments, A hook plate is fixed to the right end of the new style air intake frame. Two hanging holes are provided on the hook plate. And a round rod is fixed to the right end of the louver plate near the middle position of the new style air intake frame. A fitting seat is movably installed on the round rod. Two tension springs are connected between the fitting seat and the hook plate. Motor seats are installed on both of the two rail plates through bolts. A first motor is installed on the motor seat through bolts. A pulley is fixed to the output shaft of the first motor.

[0007] In at least some embodiments, Supports are installed on both of the two rail plates through bolts. Pulleys are installed on both of the two supports through bearings. A transmission belt is connected between the pulley on the output shaft of the first motor and the pulley on the support.

[0008] In at least some embodiments, A lifting plate slides between the two rail plates. Connecting seats are installed at the left and right ends of the lifting plate through bolts. The two connecting seats are respectively fixed to the two transmission belts through rivets. The middle position of the lifting plate is connected to the fitting seat through a screw.

[0009] In at least some embodiments, Four locking assemblies are provided on the new style air intake frame. The locking assembly includes a mounting seat, a mounting frame and a plate seat. The mounting seat is installed on the new style air intake frame through bolts. The mounting frame is installed on the mounting seat through bolts. The plate seat is connected to the mounting seat through bolts. A knob is installed on the plate seat through a bearing. A gear is fixed to the knob.

[0010] In at least some embodiments, Two first springs are provided between the plate seat and the mounting seat. And a movable rod slides on the mounting frame. An engaging plate is fixed to the movable rod. A tooth-shaped structure is provided on the engaging plate. The tooth-shaped structure on the engaging plate meshes with the gear. A second spring is movably sleeved on the movable rod.

[0011] In at least some embodiments, Two sets of fixed seats are fixed on the lifting plate. A first plate and a second plate are fixed on the fixed seats. Two sets of rail rods are fixed between the first plate and the second plate. A movable block slides on the two sets of rail rods, and a threaded hole is provided on the movable block.

[0012] In at least some embodiments, A lead screw is installed between the first plate and the second plate through a bearing. The lead screw is in threaded cooperation with the threaded hole on the movable block. A second motor is installed on the first plate through bolts. The output shaft of the second motor is connected to the lower end of the lead screw. A hinged plate is hinged on the fixed seat. A rubber plate is fixed on the hinged plate. And a fixed rod is fixed on the hinged plate. A first movable seat moves on the fixed rod. A second movable seat is hinged on the first movable seat. Connecting plates are connected between the second movable seat and the second plate and the movable block through pins respectively.

[0013] In at least some embodiments, Differential pressure alarm switches are connected to both the left and right sides of the primary filter component of the insect-proof net. The differential pressure alarm switches are electrically connected to the controller. An air pump is electrically connected to the controller. The air outlet end of the air pump is connected to a gas manifold. The gas manifold is connected to the right side of the primary filter component of the insect-proof net. And the air manifold is also connected to the air-conditioning return water pipe of the fresh air unit.

[0014] In at least some embodiments, A water coil electromagnetic exhaust valve and a water coil electromagnetic drain valve are respectively connected to the air-conditioning return water pipe and the air-conditioning supply water pipe of the fresh air unit. The water coil electromagnetic exhaust valve and the water coil electromagnetic drain valve are both electrically connected to the controller. And air-conditioning supply electric valves are connected to both the air-conditioning return water pipe and the air-conditioning supply water pipe of the fresh air unit. The two air-conditioning supply electric valves are both electrically connected to the controller.

[0015] The present invention provides a central air-conditioning intelligent maintenance system, which has the following beneficial effects: In the present invention, the louver plates on the fresh air intake frame are flexibly and automatically adjusted through a unique linkage plate, hook plate, tension spring, and motor-driven transmission belt and lifting plate structure. It is not only convenient to operate, but also can accurately control the fresh air volume to adapt to different indoor environmental requirements and outdoor climate conditions. At the same time, in terms of the daily maintenance of the louver plates, when the system detects that the louver plates are dusty to a certain extent, the cleaning program can be automatically started. The louver plates are driven by the lifting plate to vibrate or adjust the angle, making the dust easier to fall off. It effectively solves the problem of dust accumulation and blockage after long-term use, ensures a stable and efficient ventilation effect, thereby improving the indoor air quality, and reducing the problem of increased energy consumption caused by poor ventilation.

[0016] In addition, in the present invention, the primary filter component of the insect-proof net selects a plate-type primary filter, and activated carbon materials are filled in the filter plate, which greatly improves the filtering ability for pollutants such as tiny particles, harmful gases, and microorganisms in the air, significantly improves the indoor air quality. More importantly, the differential pressure alarm switches connected to the left and right sides thereof are electrically connected to the controller, which can monitor the clogging situation of the filter in real time. Once the differential pressure exceeds the set threshold, the controller will immediately issue an alarm, start the cleaning program, and high-pressure gas rushes towards the primary filter through the opened electromagnetic pneumatic valve to remove the pollutants on the filter mesh and restore the filtering performance of the filter.

[0017] In addition, in the present invention, in the winter mode, when the outdoor temperature is lower than the set value, the controller will automatically close the water supply and drainage devices of the water coil, open the solenoid valves at the coil exhaust port and drainage port, and start the air pump for purging and draining operations, and use high-pressure air to purge the inside of the water coil to ensure that there is no residual water, effectively avoiding the freezing and cracking accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0019] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0020] In the accompanying drawings: Figure 1 The system structure diagram of a central air-conditioning intelligent maintenance system of the present application is shown; Figure 2 The left-side structure diagram of the fresh air intake frame of a central air-conditioning intelligent maintenance system of the present application is shown; Figure 3 The right-side structure diagram of the fresh air intake frame of a central air-conditioning intelligent maintenance system of the present application is shown; Figure 4 The right-side structure diagram of the locking component of a central air-conditioning intelligent maintenance system of the present application is shown; Figure 5 The left-side structure diagram of the locking component of a central air-conditioning intelligent maintenance system of the present application is shown; Figure 6 The Figure 3 magnified structure diagram of part A in a central air-conditioning intelligent maintenance system of the present application is shown; Figure 7 The structure diagram of the lifting plate part of a central air-conditioning intelligent maintenance system of the present application is shown; Figure 8 The Figure 7Schematic enlarged structure diagram of part B; Figure 9 Shows a Figure 7 Schematic enlarged structure diagram of part C; Figure 10 Shows a Figure 7 Schematic enlarged structure diagram of part D; Figure 11 Schematic structure diagram of the fixed seat part of a central air - conditioning intelligent maintenance system of the present application; Figure 12 Shows a Figure 11 Schematic enlarged structure diagram of part E; Figure 13 Schematic structure diagram of the insect - proof net primary filter assembly of a central air - conditioning intelligent maintenance system of the present application.

[0021] List of reference numerals 1, Fresh air intake frame; 11, Locking assembly; 111, Mounting seat; 112, Mounting frame; 113, Plate seat; 1131, Knob; 1132, Gear; 1133, First spring; 1134, Movable rod; 1135, Engaging plate; 1136, Second spring; 12, Louver board; 121, Linking plate; 1211, Round rod; 1212, Fitting seat; 1213, Pull spring; 122, Hooking plate; 13, Mounting plate; 131, Rail plate; 132, Motor seat; 1321, First motor; 133, Support; 134, Transmission belt; 135, Lifting plate; 1351, Connecting seat; 14, Fixed seat; 141, First plate; 1411, Second motor; 142, Second plate; 1421, Rail rod; 1422, Lead screw; 143, Hinged plate; 1431, Fixed rod; 1432, First movable seat; 1433, Second movable seat; 1434, Connecting plate; 1435, Rubber plate; 144, Movable block; 2, Insect - proof net primary filter assembly; 21, Housing seat; 22, Filter plate; 3, Fresh air unit. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0023] Embodiment 1: Please refer to Figures 1 to 13 : The present invention provides an intelligent maintenance system for a central air conditioner, comprising: a fresh air intake frame 1; Five groups of louvers 12 are installed on the fresh air intake frame 1 through bearings. The left ends of the five groups of louvers 12 are movably connected to a linkage plate 121. Two mounting plates 13 are installed on the right end of the fresh air intake frame 1 through bolts. Rail plates 131 are installed on both of the two mounting plates 13 through bolts. It further comprises: An insect-proof net primary filter assembly 2, which selects a plate-type primary filter. The insect-proof net primary filter assembly 2 is installed in the air inlet passage. The insect-proof net primary filter assembly 2 comprises a housing base 21 and a filter plate 22. The housing base 21 is snap-fitted in the air inlet passage. The filter plate 22 is installed inside the housing base 21. The housing base 21 is made of stainless steel, and the filter plate 22 is filled with activated carbon material; A fresh air unit 3, which is connected with an air conditioner return water pipe, an air conditioner water supply pipe and a condensate drain pipe. The air inlet end of the fresh air unit 3 is connected to the air inlet passage.

[0024] In the embodiment of the present disclosure, A hook plate 122 is fixed to the right end of the new style air intake frame 1. Two groups of hanging holes are provided on the hook plate 122. And a round rod 1211 is fixed to the right end of the louver 12 near the middle position of the new style air intake frame 1. A fitting seat 1212 is movably installed on the round rod 1211. Two groups of tension springs 1213 are connected between the fitting seat 1212 and the hook plate 122. Motor seats 132 are installed on both of the two rail plates 131 by bolts. A first motor 1321 is installed on the motor seat 132 by bolts. A pulley is fixed to the output shaft of the first motor 1321. Supports 133 are installed on both of the two rail plates 131 by bolts. Pulleys are installed on both of the two supports 133 through bearings. A transmission belt 134 is connected between the pulley on the output shaft of the first motor 1321 and the pulley on the support 133. A lifting plate 135 slides between the two rail plates 131. Connection seats 1351 are installed on the left and right ends of the lifting plate 135 by bolts. The two connection seats 1351 are respectively fixedly connected to the two transmission belts 134 by rivets. The middle position of the lifting plate 135 is connected to the fitting seat 1212 by screws. Its functions are as follows: The louver 12 on the new style air intake frame 1 realizes the flexible and automatic adjustment of the louver 12 through a unique linkage plate 121, hook plate 122, tension spring 1213, and a structure of a transmission belt 134 and a lifting plate 135 driven by a motor. It is not only convenient to operate but also can accurately control the fresh air volume to adapt to different indoor environmental requirements and outdoor climate conditions. At the same time, in terms of the daily maintenance of the louver 12, the first motor 1321 can be intermittently started to drive the five groups of louvers 12 to rotate by the transmission belt 134. Under the cooperation of the first motor 1321 and the tension spring 1213, the louvers 12 swing back and forth, making the dust easier to fall off, effectively solving the problem of easy dust accumulation and blockage after long-term use.

[0025] In the embodiments of the present disclosure, There are four sets of locking components 11 provided on the new style air intake frame 1. The locking component 11 includes a mounting base 111, a mounting frame 112 and a plate base 113. The mounting base 111 is installed on the new style air intake frame 1 by bolts. The mounting frame 112 is installed on the mounting base 111 by bolts. The plate base 113 is connected to the mounting base 111 by bolts. A knob 1131 is installed on the plate base 113 through a bearing. A gear 1132 is fixed on the knob 1131. Two sets of first springs 1133 are arranged between the plate base 113 and the mounting base 111. And a movable rod 1134 slides on the mounting frame 112. A meshing plate 1135 is fixed on the movable rod 1134. A toothed structure is arranged on the meshing plate 1135. The toothed structure on the meshing plate 1135 meshes with the gear 1132. A second spring 1136 is movably sleeved on the movable rod 1134. Its function is: when installing and disassembling the new style air intake frame 1, by rotating the knob 1131, the gear 1132 drives the meshing plate 1135 to move up and down, realizing the expansion and contraction of the movable rod 1134. When the movable rod 1134 extends, the new style air intake frame 1 can be locked on the wall at the installation position. When the movable rod 1134 retracts, the new style air intake frame 1 can be disassembled.

[0026] Embodiment 2, on the basis of Embodiment 1, Two sets of fixed seats 14 are fixed on the lifting plate 135. A first plate 141 and a second plate 142 are fixed on the fixed seats 14. Two sets of rail rods 1421 are fixed between the first plate 141 and the second plate 142. A movable block 144 slides on the two sets of rail rods 1421. A threaded hole is arranged on the movable block 144. A lead screw 1422 is installed between the first plate 141 and the second plate 142 through a bearing. The lead screw 1422 is in threaded cooperation with the threaded hole on the movable block 144. A second motor 1411 is installed on the first plate 141 by bolts. The output shaft of the second motor 1411 is connected to the lower end of the lead screw 1422. A hinge plate 143 is hinged on the fixed seat 14. A rubber plate 1435 is fixed on the hinge plate 143. And a fixed rod 1431 is fixed on the hinge plate 143. A first movable seat 1432 moves on the fixed rod 1431. A second movable seat 1433 is hinged on the first movable seat 1432. Connecting plates 1434 are connected to the second plate 142 and the movable block 144 through pins respectively. Its function is: when the second motor 1411 rotates, the lead screw 1422 rotates accordingly. Since the lead screw 1422 is in threaded cooperation with the threaded hole on the movable block 144, the movable block 144 will slide up and down along the rail rod 1421. During this process, through the linkage of the hinge plate 143 on the fixed seat 14 and each connecting component, the hinge plate 143 can be moved to make the rubber plate 1435 tightly attached to the inner wall of the new style air intake frame 1, thereby realizing the position locking of the louver 12 and being able to accurately control the state of the louver 12.

[0027] Embodiment 3, based on Embodiment 1 and Embodiment 2, Differential pressure alarm switches are connected to both the left and right sides of the primary filter component 2 of the insect-proof net. The differential pressure alarm switches are electrically connected to the controller. An air pump is electrically connected to the controller. The air outlet end of the air pump is connected to a gas manifold. The gas manifold is connected to the right side of the primary filter component 2 of the insect-proof net. And the air manifold is also connected to the air-conditioning return water pipe of the fresh air unit 3. Water coil electromagnetic exhaust valves and water coil electromagnetic drain valves are respectively connected to the air-conditioning return water pipe and the air-conditioning supply water pipe of the fresh air unit 3. Both the water coil electromagnetic exhaust valve and the water coil electromagnetic drain valve are electrically connected to the controller. And air-conditioning supply water electric valves are connected to both the air-conditioning return water pipe and the air-conditioning supply water pipe of the fresh air unit 3. Both groups of air-conditioning supply water electric valves are electrically connected to the controller. Its functions are as follows: The differential pressure alarm switches connected to both the left and right sides of the primary filter component 2 of the insect-proof net are electrically connected to the controller, which can monitor the clogging situation of the filter in real time. Once the differential pressure exceeds the set threshold, the controller will immediately issue an alarm and start the cleaning program. At this time, the electromagnetic pneumatic valve electrically connected to the controller opens, and high-pressure gas rushes towards the primary filter through the electromagnetic pneumatic valve to remove the pollutants on the filter screen and restore the filtering performance of the filter; in the winter mode, when the outdoor temperature sensor detects that the outdoor temperature is lower than the set value, the controller will automatically close the water supply electric valve and the drainage device of the water coil, and at the same time open the solenoid valves at the coil exhaust port and the drain port, and start the air pump for purging and draining operations. The high-pressure air generated by the air pump purges the inside of the water coil through the corresponding pipelines to ensure that there is no residual water, effectively avoiding freezing and cracking accidents and ensuring the safe and stable operation of the fresh air unit 3 in winter.

[0028] The working principle of this embodiment: The five groups of louvers 12 on the fresh air intake frame 1 are linked by the linkage plate 121. The structure at its right end is matched with the hook plate 122, the tension spring 1213 and the mating seat 1212. The angle of the louvers 12 is precisely adjusted to control the fresh air volume through the transmission belt 134 and the lifting plate 135 driven by the first motor 1321 on the two groups of rail plates 131. The louvers 12 can also be reciprocally swung to clean dust by intermittently starting the first motor 1321; the shell base 21 of the primary filter component 2 of the insect-proof net is buckled to the air intake passage, and the filter plate 22 is filled with activated carbon to filter the air. The differential pressure alarm switches on both sides are connected to the controller. When the differential pressure exceeds the threshold, the controller opens the electromagnetic pneumatic valve to clean the filter plate 22 with high-pressure gas; in winter, when the outdoor temperature sensor detects that the temperature is lower than the set value, the controller closes the water supply electric valve and the drainage device of the water coil, opens the solenoid valves at the coil exhaust port and the drain port, and starts the air pump to purge and drain the water coil to avoid freezing and cracking. Each component works together to achieve efficient maintenance of ventilation, filtration and water systems, improving the performance, stability and energy utilization efficiency of the central air-conditioning system.

[0029] In this article, the following points need to be noted: 1. The accompanying drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures may refer to the general design.

[0030] 2. Without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other to obtain new embodiments.

[0031] The above are only the specific implementation manners of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should be covered within the protection scope of the present disclosure.

Claims

1. A central air conditioning intelligent maintenance system, comprising: The new style collection frame (1) is characterized in that: The new wind collecting frame (1) is provided with five groups of louver plates (12) via bearings, the left ends of the five groups of louver plates (12) are movably connected with a linkage plate (121), the right end of the new wind collecting frame (1) is provided with two groups of mounting plates (13) via bolts, and the two groups of mounting plates (13) are provided with rail plates (131) via bolts, and further comprises: The insect-proof net primary filter assembly (2) is a plate-type primary filter, the insect-proof net primary filter assembly (2) is installed in the air inlet channel, the insect-proof net primary filter assembly (2) comprises a shell seat (21) and a filter plate (22), the shell seat (21) is snap-fitted in the air inlet channel, the filter plate (22) is installed inside the shell seat (21), the shell seat (21) is made of stainless steel, and the filter plate (22) is filled with activated carbon material; A fresh air unit (3) is connected to the fresh air unit (3) with an air conditioning water return pipe, an air conditioning water supply pipe and a condensate water drain pipe, and an air inlet end of the fresh air unit (3) is connected to an air inlet channel.

2. A central air conditioning intelligent maintenance system according to claim 1, characterized in that: A hook plate (122) is fixed to the right end of the new style frame (1), and two groups of hanging holes are arranged on the hook plate (122). A round rod (1211) is fixed to the right end of the shutter plate (12) near the middle position of the new style frame (1), and a matching seat (1212) is movably installed on the round rod (1211). Two groups of tension springs (1213) are connected between the matching seat (1212) and the hook plate (122). Motor seats (132) are installed on both sets of rail plates (131) by bolts, and a No. 1 motor (1321) is installed on the motor seat (132) by bolts, and a pulley is fixed on the output shaft of the No. 1 motor (1321).

3. A central air conditioning intelligent maintenance system according to claim 2, characterized in that: Supports (133) are installed on both sets of rail plates (131) via bolts, pulleys are installed on both sets of supports (133) via bearings, and a transmission belt (134) is connected between the pulley on the output shaft of the first motor (1321) and the pulley on the support (133).

4. A central air conditioning intelligent maintenance system according to claim 3, characterized in that: A lifting plate (135) is slidably disposed between the two groups of rail plates (131). Connecting seats (1351) are installed at the left and right ends of the lifting plate (135) via bolts. The two groups of connecting seats (1351) are fixedly connected to the two groups of transmission belts (134) via rivets respectively. The middle position of the lifting plate (135) is connected to the matching seat (1212) via screws.

5. A central air conditioning intelligent maintenance system according to claim 2, characterized in that: The new style frame (1) is provided with four sets of locking components (11), the locking components (11) comprising a mounting seat (111), a mounting frame (112) and a plate seat (113), the mounting seat (111) being mounted on the new style frame (1) by means of bolts, the mounting frame (112) being mounted on the mounting seat (111) by means of bolts, the plate seat (113) being connected to the mounting seat (111) by means of bolts, a knob (1131) being mounted on the plate seat (113) by means of a bearing, and a gear (1132) being fixed on the knob (1131).

6. A central air conditioning intelligent maintenance system according to claim 5, characterized in that: Two groups of No. 1 springs (1133) are arranged between the plate seat (113) and the mounting seat (111), and a movable rod (1134) is slidably mounted on the mounting frame (112), a meshing plate (1135) is fixed on the movable rod (1134), a toothed structure is arranged on the meshing plate (1135), the toothed structure on the meshing plate (1135) meshes with the gear (1132), and a No. 2 spring (1136) is movably sleeved on the movable rod (1134).

7. A central air conditioning intelligent maintenance system according to claim 4, characterized in that: Two sets of fixed seats (14) are fixed on the lifting plate (135), a first plate (141) and a second plate (142) are fixed on the fixed seats (14), two sets of rail rods (1421) are fixed between the first plate (141) and the second plate (142), movable blocks (144) are slidably mounted on the two sets of rail rods (1421), and threaded holes are arranged on the movable blocks (144).

8. A central air conditioning intelligent maintenance system according to claim 7, characterized in that: A screw rod (1422) is installed between the first plate (141) and the second plate (142) via a bearing, the screw rod (1422) is threadedly matched with a threaded hole on the movable block (144), a second motor (1411) is installed on the first plate (141) via a bolt, an output shaft of the second motor (1411) is connected to the lower end of the screw rod (1422), a hinge plate (143) is hingedly connected to the fixed seat (14), a rubber plate (1435) is fixed to the hinge plate (143), a fixed rod (1431) is fixed to the hinge plate (143), a first movable seat (1432) is movable on the fixed rod (1431), a second movable seat (1433) is hingedly connected to the first movable seat (1432), and a connecting plate (1434) is connected between the second movable seat (1433), the second plate (142) and the movable block (144) via a pin shaft.

9. A central air conditioning intelligent maintenance system according to claim 1, characterized in that: The left and right sides of the insect-proof net primary filter assembly (2) are both connected to a pressure differential alarm switch, the pressure differential alarm switch is electrically connected to a controller, the controller is electrically connected to an air pump, the air outlet of the air pump is connected to a gas bus, the gas bus is connected to the right side of the insect-proof net primary filter assembly (2), and the air bus is also connected to the air conditioning return pipe of the fresh air unit (3).

10. A central air conditioning intelligent maintenance system according to claim 9, characterized in that: The air conditioning return pipe and the air conditioning water supply pipe of the fresh air unit (3) are respectively connected to a water coil electromagnetic exhaust valve and a water coil electromagnetic drain valve, and the water coil electromagnetic exhaust valve and the water coil electromagnetic drain valve are both electrically connected to the controller, and the air conditioning return pipe and the air conditioning water supply pipe of the fresh air unit (3) are both connected to an air conditioning water supply electric valve, and the two sets of air conditioning water supply electric valves are both electrically connected to the controller.

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