Energy efficiency management system and energy efficiency management method based on central air conditioner

Abstract

The invention discloses an energy efficiency management system and method based on a central air conditioner. The energy efficiency management system comprises a drying unit and a control unit. The drying unit comprises a drying air bellow and a reusable drying filter plate, openings in the two ends of the drying air bellow communicate with an indoor air pipe of the central air conditioner, and a transverse inserting groove is formed in the bottom wall of the drying air bellow. The drying filter plate is inserted into the drying air bellow from bottom to top along the inserting groove, moisture in air passing through the drying air bellow is absorbed through the drying filter plate, and therefore the humidity of the air in the indoor air pipe is reduced. Compared with existing condensation dehumidification, the energy efficiency management method has the advantages that through efficient management, control and optimization, the electric energy consumed by completely recovering the drying filter plate is far smaller than the electric energy of the compressor, so that the energy consumption of the central air conditioner in the dehumidification mode is reduced, and the energy efficiency management is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy efficiency management, and particularly relates to an energy efficiency management system and an energy efficiency management method based on a central air conditioner. Background Art

[0002] The temperature and humidity regulation of buildings such as office buildings, hospitals, and libraries is mainly achieved through central air conditioners. A central air conditioner is a system used for centralized regulation and control of parameters such as air temperature, humidity, and cleanliness in buildings. Its specific structure consists of a cold and heat source system and an air conditioning system. The cold and heat system is the core of the central air conditioning system and is responsible for providing cooling or heating. The air conditioning system is responsible for regulating the temperature, humidity, and cleanliness of the air and delivering it to the usage area.

[0003] The dehumidification principle of existing central air conditioners is condensation dehumidification, which utilizes the property that water vapor will condense into liquid water when air is cooled. The surface temperature of the evaporator of the air conditioner is lower than the dew point temperature of the indoor air. When the humid air flows through the surface of the evaporator, the water vapor therein will be cooled and liquefied into water droplets, which are collected and discharged through the drainage system, thereby reducing the moisture content in the air and achieving the dehumidification effect. The specific operation process is that when the air conditioning refrigeration system operates, the refrigerant evaporates and absorbs heat in the evaporator, causing the surface temperature of the evaporator to decrease. The indoor air is sucked into the air conditioner unit by the fan, undergoes heat exchange through the surface of the evaporator, the air temperature decreases, and the water vapor therein condenses into water droplets. The dried air is then sent back into the room by the fan, and this cycle continues to continuously reduce the indoor air humidity. However, condensation dehumidification has the following deficiencies: 1. The essence of air conditioner dehumidification is to use the refrigeration system to lower the air temperature below the dew point, causing water vapor to condense into water and be discharged. When the ambient temperature is relatively low (such as below 18°C), the moisture content of the air is already relatively low, and the dehumidification effect drops significantly, and even the system may stop due to frost formation on the evaporator.

[0004] 2. Compared with professional dehumidifiers, the dehumidification mode of air conditioners needs to take into account the refrigeration function, with a smaller air volume and a limited dehumidification capacity.

[0005] 3. In the dehumidification mode, the air conditioner compressor needs to run continuously, and the energy consumption is close to that of the refrigeration mode. After the compressor stops, dehumidification cannot be achieved through the internal or external circulation air supply mode.

[0006] 4. In order to maintain the set temperature, while the air passes through the evaporator to reduce humidity, the temperature decreases accordingly, and then after being heated to the set temperature, it is sent into the room. This process involves two steps: cooling and dehumidification and heating, and there is a problem of cold and heat cancellation between these two steps, with higher energy consumption than the refrigeration mode.

[0007] 5. Air conditioner dehumidification relies on the refrigeration system and cannot set the target humidity separately (such as 40% - 60%), and the humidity control accuracy is poor.

[0008] 6. In the plum rain season or high humidity environment (humidity > 70%), the dehumidification effect of the air conditioner is far less than that of professional equipment, and long-term operation is likely to cause compressor wear. Summary of the Invention

[0009] In view of the deficiencies of the prior art, the present invention provides an energy efficiency management system based on a central air conditioner, including a drying unit and a control unit; the drying unit includes a drying air box and a reusable drying filter plate, both ends of the drying air box are open and communicated with the indoor air duct of the central air conditioner, and a horizontal slot is provided on the bottom wall of the drying air box; the drying filter plate is inserted into the drying air box from bottom to top along the slot, and the moisture in the air passing through the drying air box is absorbed by the drying filter plate, thereby reducing the air humidity in the indoor air duct; the drying unit includes a drying air box connected below the drying air box, and the drying filter plate extends downward and penetrates through the top wall and the bottom wall of the drying air box; the control unit includes an upper actuator installed on the top wall of the drying air box, there are two upper actuators, and the two upper actuators are respectively close to the two ends of the drying air box; each upper actuator is provided with a shutter that can block the drying air box; the control unit includes a lower actuator installed below the bottom wall of the drying air box, the lower actuator is connected to the lower end of the drying filter plate, and the drying filter plate is driven to move downward through the lower actuator, so that the water absorption area of the drying filter plate moves from the drying air box to the drying air box; the control unit includes a pipeline switching mechanism, the pipeline switching mechanism includes an air inlet pipe and an air outlet pipe, one end of the air inlet pipe is communicated with the heat dissipation end of the central air conditioner outdoor unit, and the other end is respectively communicated with the drying air box and the drying air box through two branch pipes; one end of the air outlet pipe is communicated with the atmosphere, and the other end is respectively communicated with the drying air box and the drying air box through two other branch pipes, and solenoid valves are provided on all branch pipes.

[0010] The preferred solution of the energy efficiency management system based on the central air conditioner in the present invention is: the drying unit is provided with two drying air boxes and two drying air boxes, the two ends of one drying air box are closed, and each drying air box is correspondingly provided with a drying air box below, and the two drying air boxes are communicated through two intermediate pipes with pipeline valves, and the two intermediate pipes are located on both sides of the drying filter plate. The indoor air duct of the central air conditioner is communicated with the two drying air boxes through the intermediate pipes, and is switched between the two drying air boxes through two pipeline valves and shutters to keep the indoor air duct always unobstructed. Whether the central air conditioner is in the internal circulation mode or the external circulation mode, the drying unit does not affect the air supply.

[0011] The preferred solution of the energy efficiency management system based on the central air conditioner in the present invention is as follows: The control unit is provided with two groups of lower actuating mechanisms, and the two groups of lower actuating mechanisms are respectively installed on two drying air boxes. Each drying air box is respectively provided with three parallel drying filter plates, and three groups of electric heating wires are arranged inside each drying air box, and each group of electric heating wires is located in the upwind area corresponding to one drying filter plate; The lower actuating mechanism of each drying air box is provided with two opposite lower electric cylinder assemblies, and a connecting rod is connected between the sliders of the two lower electric cylinder assemblies and the lower ends of the corresponding three drying filter plates. Specifically, two connecting rods are arranged between two opposite sliders, and the lower ends of the corresponding three drying filter plates are provided with ear plates corresponding to each connecting rod, and the connecting rod passes through the corresponding ear plate to form a detachable structure, which is convenient for replacing the drying filter plates that have reached the service life in the later stage.

[0012] The control unit is provided with two groups of pipeline switching mechanisms. One group of pipeline switching mechanisms is connected between a drying air box and a corresponding drying air box, and the other group of pipeline switching mechanisms is connected between another drying air box and a corresponding drying air box. The air inlet pipes of the two groups of pipeline switching mechanisms are merged to form a total air inlet pipe, and the total air inlet pipe is communicated with the external machine heat dissipation end. Similarly, the exhaust pipes of the two groups of pipeline switching mechanisms are merged to form a total exhaust pipe.

[0013] The preferred solution of the energy efficiency management system based on the central air conditioner in the present invention is as follows: Each upper actuating mechanism includes an upper electric cylinder assembly, and each upper electric cylinder assembly is fixedly connected to the upper end of the corresponding gate plate through a triangular bracket. Each upper electric cylinder assembly is provided with two telescopic cylinders, and the two telescopic cylinders extend and retract synchronously, and the two telescopic cylinders form a stable linkage structure with the gate plate through a triangular bracket, and the gate plate does not shake during the sliding process.

[0014] The preferred solution of the energy efficiency management system based on the central air conditioner in the present invention is as follows: The control unit includes a sensor group and a control center. The sensor group includes temperature and humidity sensors respectively installed in the drying air box and the drying air box. The control center is electrically connected to the central air conditioner controller, the sensor group, all the electric heating wires, all the upper electric cylinder assemblies, all the lower electric cylinder assemblies, all the pipeline valves and all the solenoid valves.

[0015] The beneficial effects of the energy efficiency management system based on the central air conditioner in the present invention are as follows: 1. The drying filter plate absorbs moisture in the air by physical adsorption, and the dehumidification effect is remarkable. After the drying filter plate is saturated, it can be heated and restored, which can replace the existing condensation dehumidification. The drying filter plate can be reused without limitation of the dehumidification amount. When the service life of the drying filter plate ends, the dehumidification amount can be continuously maintained by replacing the drying filter plate.

[0016] 2. Different from the existing condensation dehumidification, this dehumidification method does not consume electric energy, reduces the load of the central air-conditioning cold and heat source system, and reduces compressor wear.

[0017] 3. Utilize the heat dissipated by the outdoor unit to partially or completely restore the drying filter plate, realizing energy recovery and reducing the electric energy consumed for completely restoring the drying filter plate. Compared with the existing condensation dehumidification, the electric energy consumed for completely restoring the drying filter plate is much less than the electric energy of the compressor. Therefore, the energy consumption in the dehumidification mode of the central air-conditioning is reduced, and through efficient management and optimization, the energy efficiency management is higher.

[0018] 4. The drying filter plate dehumidifies by physical means, and the temperature of the air does not increase or decrease, effectively solving the problem of cold and heat cancellation caused by the two steps of cooling dehumidification and heating.

[0019] The present invention also provides an energy efficiency management method for a central air-conditioning. Based on the above-mentioned energy efficiency management system for the central air-conditioning, the drying air box directly connected to the indoor air duct is the main drying air box, and the corresponding drying air box below is the main drying air box; the other drying air box is the secondary drying air box, and the corresponding drying air box below is the secondary drying air box; When the central air-conditioning turns on the dehumidification mode, the steps are as follows: S1. The control center makes the lower actuator of the main drying air box push three drying filter plates into the main drying air box according to the set temperature and humidity values, and the insertion depth is inversely proportional to the humidity value in the set temperature and humidity values; S2. When the drying filter plates in the main drying air box are saturated with water absorption, two power cylinders drive the corresponding gate plates to insert into the main drying air box respectively; the lower actuator of the secondary drying air box pushes three drying filter plates into the main drying air box, and the insertion depth is the same as that of the drying filter plates in the main drying air box; two pipeline valves are opened, and the air in the indoor air duct passes through the secondary drying air box; S3. The solenoid valves of the two branch pipes connected to the main drying air box are opened, the hot air generated by the central air-conditioning outdoor unit passes through the air inlet pipe and the main drying air box in sequence, and finally is discharged from the exhaust pipe. The three drying filter plates in the main drying air box are gradually restored by heating; S4. If the three drying filter plates in the secondary drying air box are not completely restored before they are saturated with water absorption, the two lower power cylinders of the main drying air box pull down the three drying filter plates simultaneously, so that the water absorption areas of the three drying filter plates move from the main drying air box to the main drying air box. The solenoid valves of the two branch pipes connected to the main drying air box are closed, the solenoid valves of the two branch pipes connected to the main drying air box are opened, and the three groups of electric heating wires generate heat. The hot air generated by the central air-conditioning outdoor unit is switched to the main drying air box, and the three drying filter plates in the main drying air box are quickly restored by using high temperature; S5. When the three drying filter plates of the auxiliary drying air box are saturated with water absorption, the three drying filter plates of the main drying air box are reset, the two gate plates are reset, the two pipeline valves are closed, and the air in the indoor air duct passes through the main drying air box; meanwhile, the solenoid valves of the two branch pipes connected to the main drying air box are closed, and the solenoid valves of the two branch pipes connected to the auxiliary drying air box are opened. The hot air generated by the outdoor unit of the central air conditioner passes through the auxiliary drying air box, and the three drying filter plates of the auxiliary drying air box are gradually restored by heating. S6. If the three drying filter plates of the auxiliary drying air box are not completely restored before the three drying filter plates of the main drying air box are saturated with water absorption, the two lower electric cylinder assemblies of the main and auxiliary drying air boxes simultaneously pull down the three drying filter plates, so that the water absorption areas of the three drying filter plates move from the auxiliary drying air box to the auxiliary drying oven. The solenoid valves of the two branch pipes connected to the auxiliary drying air box are closed, the solenoid valves of the two branch pipes connected to the auxiliary drying oven are opened, and the three groups of electric heating wires generate heat. The hot air generated by the outdoor unit of the central air conditioner is switched to the auxiliary drying oven, and the three drying filter plates of the auxiliary drying oven are quickly restored by using high temperature. S7. Repeat S2 - S6 to keep the temperature and humidity values of the air at the outlet the same as the set temperature and humidity values.

[0020] The beneficial effects of the energy efficiency management method of the central air conditioner in the present invention are as follows: 1. The depth of the water absorption area of the drying filter plate inserted into the main / auxiliary drying air box is adjustable, that is, the dehumidification capacity can be adjusted in real time according to the set humidity value, and the humidity control accuracy is significantly improved.

[0021] 2. The two drying air boxes are switched back and forth to maintain a continuous and stable dehumidification effect.

[0022] 3. If the heat of the outdoor unit in the drying air box is sufficient to restore the drying filter plate, there is no need to switch to the drying oven, the electric heating wire does not start, and the drying filter plate is restored with zero energy consumption. If the set humidity value is low, the drying filter plate is saturated quickly and cannot be restored in a short time, then the electric heating wire can be used to accelerate the restoration speed. This energy efficiency management minimizes the energy consumption of the restoration of the drying filter plate as much as possible on the premise of meeting the dehumidification requirements, and further reduces the overall energy consumption in the dehumidification mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of the energy efficiency management system based on the central air conditioner in the present invention; Figure 2 is Figure 1 The top view after hiding the outdoor unit in the figure; Figure 3 is Figure 2 three-dimensional Figure 1 ; Figure 4 is Figure 2 three-dimensional Figure 2 .

[0025] Reference numerals: drying air box 1, drying filter plate 2, indoor air duct 3, intermediate pipe 4, pipe valve 5, drying oven 6, heating wire monomer 7, shutter 8, telescopic cylinder 9, triangular bracket 10, lower electric cylinder assembly 11, slider 12, connecting rod 13, ear plate 14, air inlet pipe 15, air outlet pipe 16, branch pipe 17, solenoid valve 18, air collecting hood 19, outdoor unit 20. Detailed implementation manners

[0026] In view of the deficiencies in the prior art, the inventors of this case have proposed the technical solution of the present invention through long-term research and a large number of practices. The following will further explain the technical solution, its implementation process and principle in combination with the drawings in the embodiments of this application and specific implementation cases.

[0027] Embodiment 1: As Figure 2 , Figure 3 shown, Embodiment 1 provides an energy efficiency management system based on a central air conditioner, including a drying unit and a control unit. The drying unit includes a drying air box 1 and a reusable drying filter plate 2. The two ends of the drying air box 1 are open and communicated with the indoor air duct 3 of the central air conditioner, and a horizontal slot is provided on the bottom wall of the drying air box 1; the drying filter plate 2 is inserted into the drying air box 1 from bottom to top along the slot, and the moisture in the air passing through the drying air box 1 is absorbed by the drying filter plate 2, thereby reducing the air humidity in the indoor air duct 3. Specifically, two drying air boxes 1 are provided in the drying unit, one of the drying air boxes 1 is closed at both ends, and the other drying air box 1 is kept communicated with the indoor air duct 3. The two drying air boxes 1 are communicated through two intermediate pipes 4 with pipe valves 5, and the two intermediate pipes 4 are located on both sides of the drying filter plate 2. Further, each drying air box 1 is respectively provided with three parallel drying filter plates 2. The indoor air duct 3 of the central air conditioner is communicated with the two drying air boxes 1 through the intermediate pipes 4, and is switched between the two drying air boxes 1 through two pipe valves 5 to keep the indoor air duct 3 always unobstructed. Whether the central air conditioner is in the internal circulation mode or the external circulation mode, the drying unit does not affect the air supply.

[0028] A drying air box 6 is connected below each drying air box 1, and each drying filter plate 2 extends downward and penetrates through the top wall and the bottom wall of the drying air box 6. The water absorption area of each drying filter plate 2 is located in the upper part of the drying filter plate 2. After the drying filter plate 2 moves downward, the water absorption area can be switched to the drying air box 6, but the upper edge of the drying filter plate 2 is always located in the drying air box 1 and does not separate from the drying air box 1. In addition, three groups of electric heating wires are provided inside each drying air box 6, and each group of electric heating wires is located in the upwind area of a corresponding drying filter plate 2. Each group of electric heating wires is provided with four heating wire monomers 7, and the four heating wire monomers 7 are longitudinally distributed at equal intervals to uniformly heat the upwind area of each drying filter plate 2.

[0029] As Figure 3 shown, the control unit in this embodiment includes upper actuating mechanisms installed on the top wall of the drying air box 1. There are two upper actuating mechanisms, and the two upper actuating mechanisms are respectively close to the two openings at the two ends of the drying air box 1. Specifically, each upper actuating mechanism is provided with a gate plate 8 that can block the drying air box 1, and each upper actuating mechanism includes an upper electric cylinder assembly. Each upper electric cylinder assembly is fixedly connected to the upper end of the corresponding gate plate 8 through a triangular bracket 10. Each upper electric cylinder assembly is provided with two telescopic cylinders 9. The two telescopic cylinders 9 expand and contract synchronously, and the two telescopic cylinders 9 form a stable linkage structure with the gate plate 8 through the triangular bracket 10, so that the gate plate 8 does not shake during the sliding process.

[0030] As Figure 4 shown, the control unit in this embodiment further includes a lower actuating mechanism installed under the bottom wall of the drying air box 6. The lower actuating mechanism is connected to the lower end of the drying filter plate 2, and the drying filter plate 2 is driven to move downward through the lower actuating mechanism, so that the water absorption area of the drying filter plate 2 moves from the drying air box 1 to the drying air box 6. Specifically, each lower actuating mechanism of the drying air box 6 is provided with two opposite lower electric cylinder assemblies 11. A connecting rod 13 is connected between the sliders 12 of the two lower electric cylinder assemblies 11 and the lower ends of the corresponding three drying filter plates 2. There are two groups of lower actuating mechanisms, and the two groups of lower actuating mechanisms are respectively installed on the two drying air boxes 6. Specifically, two connecting rods 13 are provided between the two opposite sliders 12, and the lower ends of the corresponding three drying filter plates 2 are provided with ear plates 14 corresponding to each connecting rod 13. The connecting rod 13 passes through the corresponding ear plate 14 to form a detachable structure, which is convenient for replacing the drying filter plate 2 that has reached the service life in the later stage.

[0031] As Figure 1As shown in the figure, the control unit in this embodiment further includes a pipeline switching mechanism. The pipeline switching mechanism includes an air inlet pipe 15 and an air exhaust pipe 16. One end of the air inlet pipe 15 is connected to the heat dissipation end of the central air-conditioning outdoor unit 20, and the other end is respectively connected to the drying air box 1 and the drying oven 6 through two branch pipes 17. In order to facilitate the collection of the heat blown out by the central air-conditioning outdoor unit 20, an air collecting hood 19 is used to cover the air outlet of the outdoor unit 20, which does not affect the air intake and heat dissipation of the outdoor unit 20. Other methods for collecting the hot air of the outdoor unit 20 can also be used, and this embodiment does not make any restrictions. One end of the air exhaust pipe 16 is connected to the atmosphere, and the other end is respectively connected to the drying air box 1 and the drying oven 6 through two other branch pipes 17, and electromagnetic valves 18 are provided on all the branch pipes 17. Similarly, the control unit is provided with two groups of pipeline switching mechanisms. One group of pipeline switching mechanisms is connected between a drying air box 1 and a corresponding drying oven 6, and the other group of pipeline switching mechanisms is connected between another drying air box 1 and a corresponding drying oven 6. The air inlet pipes 15 of the two groups of pipeline switching mechanisms are combined to form a total air inlet pipe 15, and the total air inlet pipe 15 is connected to the heat dissipation end of the outdoor unit 20, while the air exhaust pipes 16 of the two groups of pipeline switching mechanisms are combined to form a total air exhaust pipe 16.

[0032] The energy efficiency management system of this embodiment uses the heat dissipated by the outdoor unit 20 to partially or completely restore the drying filter plate 2, realizing energy recovery and reducing the electric energy consumed for completely restoring the drying filter plate 2. Compared with the existing condensation dehumidification, the electric energy consumed for completely restoring the drying filter plate 2 is much less than the electric energy of the compressor, thus reducing the energy consumption in the dehumidification mode of the central air-conditioning, achieving efficient management and optimization, and higher energy efficiency management.

[0033] Embodiment Two; Embodiment Two provides an energy efficiency management method for a central air-conditioning, which is applied to the energy efficiency management system based on the central air-conditioning in Embodiment One. The control unit further includes a sensor group and a control center. The control center uses a mature industrial control computer, and the control program is written into the memory of the industrial control computer as needed. The specific model of the industrial control computer is not limited. The sensor group includes temperature and humidity sensors respectively installed in the drying air box 1 and the drying oven 6, and the real-time temperature and humidity values are sent to the control center to form a humidity closed-loop control, improving the accuracy of humidity control. The control center is electrically connected to the central air-conditioning controller, the sensor group, all the electric heating wires, all the upper electric cylinder components, all the lower electric cylinder components 11, all the pipeline valves 5, and all the electromagnetic valves 18 respectively.

[0034] For the convenience of expression, in this embodiment, the drying air box 1 directly connected to the indoor air duct 3 is the main drying air box 1, and the corresponding drying oven 6 below is the main drying oven 6; the other drying air box 1 is the secondary drying air box 1, and the corresponding drying oven 6 below is the secondary drying oven 6.

[0035] When the central air conditioner is turned on in the dehumidification mode, the controller of the central air conditioner sends the set temperature and humidity values to the control center. The control center makes the lower actuator of the main drying air box 6 push three drying filter plates 2 into the main drying air box 1 according to the set temperature and humidity values. The insertion depth is inversely proportional to the humidity value in the set temperature and humidity values. The insertion depth is not fixed and is adjusted accordingly according to the real-time humidity value captured by the sensor group.

[0036] In this embodiment, the drying filter plate 2 is filled with a reusable desiccant. The desiccant can be a silica gel desiccant, which has a high-porosity structure and can effectively adsorb moisture in the air. It can be regenerated in an environment of 80 - 120°C, and the regeneration speed is affected by the temperature. The desiccant can also be a molecular sieve desiccant. Its drying principle is to adsorb water vapor in the air and lock it through its own adsorption pore diameter. The molecular sieve desiccant can also be restored by heating. The specific type of the desiccant is not limited in this embodiment as long as it meets the requirement of being reusable and the restoration condition is not exceeding 350°C.

[0037] When the drying filter plates 2 in the main drying air box 1 are saturated with water absorption, the two power-on cylinder assemblies drive the corresponding shutter plates 8 to insert into the main drying air box 1 respectively; the lower actuator of the secondary drying air box 1 pushes three drying filter plates 2 into the main drying air box 1, and the insertion depth is the same as that of the drying filter plates 2 in the main drying air box 6; the two pipeline valves 5 are opened, and the air in the indoor air duct 3 passes through the secondary drying air box 1. Then the ventilation route is switched, and the solenoid valves 18 of the two branch pipes 17 connected to the main drying air box 1 are opened. The hot air generated by the central air conditioner outdoor unit 20 passes through the air inlet pipe 15 and the main drying air box 1 in sequence, and finally is discharged from the exhaust pipe 16. The three drying filter plates 2 in the main drying air box 1 are gradually restored by heating. If the three drying filter plates 2 in the main drying air box 1 are not completely restored before the three drying filter plates 2 in the secondary drying air box 1 are saturated with water absorption, the two lower cylinder assemblies 11 of the main drying air box 6 pull down the three drying filter plates 2 simultaneously, so that the water absorption areas of the three drying filter plates 2 move from the main drying air box 1 to the main drying air box 6. The solenoid valves 18 of the two branch pipes 17 connected to the main drying air box 1 are closed, the solenoid valves 18 of the two branch pipes 17 connected to the main drying air box 6 are opened, and the three groups of electric heating wires generate heat. The hot air generated by the central air conditioner outdoor unit 20 is switched to the main drying air box 6, and the three drying filter plates 2 in the main drying air box 6 are quickly restored by using high temperature. However, if the three drying filter plates 2 in the main drying air box 1 are completely restored before the three drying filter plates 2 in the secondary drying air box 1 are saturated with water absorption, there is no need to switch to the main drying air box 6, so there is no need to start the electric heating wires, achieving the purpose of energy saving.

[0038] Similarly, when the three drying filter plates 2 of the auxiliary drying air box 1 are saturated with water absorption, the three drying filter plates 2 of the main drying air box 1 are reset, the two gate plates 8 are reset, the two pipeline valves 5 are closed, and the air in the indoor air duct 3 passes through the main drying air box 1; at the same time, the solenoid valves 18 of the two branch pipes 17 connected to the main drying air box 6 are closed, and the solenoid valves 18 of the two branch pipes 17 connected to the auxiliary drying air box 6 are opened. The hot air generated by the central air-conditioning outdoor unit 20 passes through the auxiliary drying air box 1, and the three drying filter plates 2 of the auxiliary drying air box 1 are gradually restored by heating. Before the three drying filter plates 2 of the main drying air box 1 are saturated with water absorption, if the three drying filter plates 2 of the auxiliary drying air box 1 are not fully restored, the two lower electric cylinder assemblies 11 of the auxiliary main drying air box 6 simultaneously pull down the three drying filter plates 2, so that the water absorption areas of the three drying filter plates 2 move from the auxiliary drying air box 1 to the auxiliary drying air box 6. The solenoid valves 18 of the two branch pipes 17 connected to the auxiliary drying air box 1 are closed, the solenoid valves 18 of the two branch pipes 17 connected to the auxiliary drying air box 6 are opened, and the three groups of electric heating wires generate heat. The hot air generated by the central air-conditioning outdoor unit 20 is switched to the auxiliary drying air box 6, and the three drying filter plates 2 of the auxiliary drying air box 6 are quickly restored by using high temperature. If the three drying filter plates 2 of the auxiliary drying air box 1 are fully restored before the three drying filter plates 2 of the main drying air box 1 are saturated with water absorption, there is no need to switch to the auxiliary drying air box 6.

[0039] The purpose of the back-and-forth switching between the drying air box 1 and the drying air box 6 in this embodiment is as follows: The heat dissipation temperature of the central air-conditioning outdoor unit 20 is usually not higher than 70°C, the maximum temperature that the drying air box 1 can withstand is not higher than 80°C, and the maximum temperature that the drying air box 6 can withstand is not higher than 400°C. The higher the temperature that the air box can withstand, the more expensive the corresponding material and the higher the manufacturing cost. Different desiccants have different restoration temperatures, and the restoration speed is proportional to the temperature. In order to meet the requirement of quick restoration within a short time, the drying air box 6 has a higher heat resistance temperature and a higher manufacturing cost. On the contrary, the drying air box 1 is to meet the restoration conditions of some desiccants that can be restored below 80°C, and to reduce the restoration energy consumption by extending the drying time without starting the electric heating wires. The drying air box 1 has a low heat resistance temperature and reduces the equipment cost.

[0040] In this embodiment, the dehumidification capacity can be adjusted in real time according to the set humidity value through the above method, and the humidity control accuracy is significantly improved. At the same time, the energy efficiency management in the dehumidification mode is improved. If the heat of the outdoor unit 20 in the drying air box 1 is sufficient to restore the drying filter plate 2, there is no need to switch to the drying air box 6, and the electric heating wire is not started. Although the drying air box is a "slow" restoration channel, the drying filter plate is restored with zero energy consumption, but the time required for restoration is relatively long. If the set humidity value is low, the saturation speed of the drying filter plate 2 is fast, and it is impossible to restore the drying filter plate 2 in a short time. Then, the electric heating wire can be used to accelerate the restoration speed. The drying air box is a "fast" restoration channel, and the electric heating wire consumes a small amount of electric energy, and the power of the electric heating wire is much lower than the power of the central air-conditioning compressor. This energy efficiency management is set according to the air-conditioning dehumidification requirements and the principle of energy consumption optimization on the premise of meeting the dehumidification requirements, minimizing the energy consumption for the restoration of the drying filter plate 2 and further reducing the overall energy consumption in the dehumidification mode. If the external weather changes suddenly, the "slow" restoration channel and the "fast" restoration channel can be switched at any time according to the changes in external temperature and humidity.

[0041] It should be understood that the above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An energy efficiency management system based on a central air conditioner, characterized in that: It includes a drying unit and a control unit; The drying unit includes a drying air box and a reusable drying filter plate. Both ends of the drying air box are open and communicated with the indoor air duct of the central air conditioner, and a horizontal slot is provided on the bottom wall of the drying air box; the drying filter plate is inserted into the drying air box from bottom to top along the slot, and the moisture in the air passing through the drying air box is absorbed by the drying filter plate, thereby reducing the air humidity in the indoor air duct; the drying unit includes a drying air box connected below the drying air box, and the drying filter plate extends downward and penetrates through the top wall and the bottom wall of the drying air box; The control unit includes upper actuators installed on the top wall of the drying air box. There are two upper actuators, and the two upper actuators are respectively close to the openings at both ends of the drying air box; each upper actuator is provided with a shutter that can block the drying air box; the control unit includes a lower actuator installed under the bottom wall of the drying air box, and the lower actuator is connected to the lower end of the drying filter plate. The drying filter plate is driven to move downward by the lower actuator, so that the water absorption area of the drying filter plate moves from the drying air box to the drying air box; the control unit includes a pipeline switching mechanism, and the pipeline switching mechanism includes an air inlet pipe and an air outlet pipe. One end of the air inlet pipe is communicated with the heat dissipation end of the central air conditioner outdoor unit, and the other end is respectively communicated with the drying air box and the drying air box through two branch pipes; one end of the air outlet pipe is communicated with the atmosphere, and the other end is respectively communicated with the drying air box and the drying air box through two other branch pipes, and all branch pipes are provided with solenoid valves.

2. The energy efficiency management system based on the central air conditioner according to claim 1, wherein: The drying unit is provided with two drying air boxes and two drying air boxes. Both ends of one drying air box are closed. Each drying air box corresponds to a drying air box below. The two drying air boxes are communicated through two intermediate pipes with pipeline valves, and the two intermediate pipes are located on both sides of the drying filter plate.

3. The energy efficiency management system based on a central air conditioner according to claim 2, wherein: The control unit is provided with two groups of lower actuators and two groups of pipeline switching mechanisms. The two groups of lower actuators are respectively installed on two drying air boxes. One group of pipeline switching mechanisms is connected between a drying air box and the corresponding drying air box, and the other group of pipeline switching mechanisms is connected between the other drying air box and the corresponding drying air box.

4. The energy efficiency management system based on a central air conditioner according to claim 3, wherein: Each drying air box is respectively provided with three parallel drying filter plates. Each drying air box is internally provided with three groups of electric heating wires, and each group of electric heating wires is located in the upwind area corresponding to a drying filter plate; each lower actuator of each drying air box is provided with two opposite lower electric cylinder assemblies, and the sliders of the two lower electric cylinder assemblies are connected to the lower ends of the corresponding three drying filter plates through a connecting rod.

5. The energy efficiency management system based on a central air conditioner according to claim 4, characterized in that: Each upper actuator includes an upper electric cylinder assembly, and each upper electric cylinder assembly is fixedly connected to the upper end of the corresponding shutter through a triangular bracket.

6. The energy efficiency management system based on a central air conditioner according to claim 1, characterized in that: The control unit includes a sensor group and a control center. The sensor group includes temperature and humidity sensors respectively installed in the drying air box and the drying air box. The control center is electrically connected to the central air conditioner controller, the sensor group, all the electric heating wires, all the upper electric cylinder assemblies, all the lower electric cylinder assemblies, all the pipeline valves, and all the solenoid valves.

7. An energy efficiency management method for a central air conditioner, characterized in that: For the energy efficiency management system based on the central air conditioner as described in claim 6, the drying air box directly connected to the indoor air duct is the main drying air box, and the corresponding drying air box below is the main drying oven air box; the other drying air box is the secondary drying air box, and the corresponding drying oven air box below is the secondary drying oven air box. When the central air conditioner turns on the dehumidification mode, the steps are as follows: S1. The control center makes the lower actuator of the main drying oven air box push the three drying filter plates into the main drying air box according to the set temperature and humidity values, and the insertion depth is inversely proportional to the humidity value in the set temperature and humidity values. S2. When the drying filter plates in the main drying air box are saturated with water absorption, the two power cylinders drive the corresponding gate plates to insert into the main drying air box respectively; the lower actuator of the secondary drying air box pushes the three drying filter plates into the main drying air box, and the insertion depth is the same as that of the drying filter plates in the main drying oven air box; the two pipeline valves are opened, and the air in the indoor air duct passes through the secondary drying air box. S3. The solenoid valves of the two branch pipes connected to the main drying air box are opened, the hot air generated by the central air conditioner outdoor unit passes through the air inlet pipe and the main drying air box in sequence, and finally discharges from the exhaust pipe. The three drying filter plates in the main drying air box are gradually restored by heating. S4. If the three drying filter plates in the main drying air box are not completely restored before the three drying filter plates in the secondary drying air box are saturated with water absorption, the two lower power cylinders of the main drying oven air box pull down the three drying filter plates at the same time, so that the water absorption area of the three drying filter plates moves from the main drying air box to the main drying oven air box. The solenoid valves of the two branch pipes connected to the main drying air box are closed, the solenoid valves of the two branch pipes connected to the main drying oven air box are opened, and the three groups of electric heating wires generate heat. The hot air generated by the central air conditioner outdoor unit is switched to the main drying oven air box, and the three drying filter plates in the main drying oven air box are quickly restored by using high temperature. S5. When the three drying filter plates in the secondary drying air box are saturated with water absorption, the three drying filter plates in the main drying air box are reset, the two gate plates are reset, and the two pipeline valves are closed. The air in the indoor air duct passes through the main drying air box; at the same time, the solenoid valves of the two branch pipes connected to the main drying oven air box are closed, the solenoid valves of the two branch pipes connected to the secondary drying oven air box are opened, the hot air generated by the central air conditioner outdoor unit passes through the secondary drying air box, and the three drying filter plates in the secondary drying air box are gradually restored by heating. S6. If the three drying filter plates in the secondary drying air box are not completely restored before the three drying filter plates in the main drying air box are saturated with water absorption, the two lower power cylinders of the secondary main drying oven air box pull down the three drying filter plates at the same time, so that the water absorption area of the three drying filter plates moves from the secondary drying air box to the secondary drying oven air box. The solenoid valves of the two branch pipes connected to the secondary drying air box are closed, the solenoid valves of the two branch pipes connected to the secondary drying oven air box are opened, and the three groups of electric heating wires generate heat. The hot air generated by the central air conditioner outdoor unit is switched to the secondary drying oven air box, and the three drying filter plates in the secondary drying oven air box are quickly restored by using high temperature. S7. Repeat S2 - S6 to keep the temperature and humidity values of the air at the outlet the same as the set temperature and humidity values.

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