Underground constant-temperature and constant-humidity special cave depot environment control system and control method thereof

Abstract

The invention relates to the technical field of environment control systems, in particular to an underground constant-temperature and constant-humidity special cave depot environment control system and a control method thereof. After the water and the fumed silica are mixed, the fumed silica can wrap the outer layer of each small water drop to form a substance which looks like a solid but actually contains most of water; the periphery of each silicon dioxide particle is wrapped with a water drop, so that the mixture has a great surface area, and the adsorption capacity of the mixture is enhanced; due to the adsorption capacity of the mixture, pollutants such as greenhouse gases such as carbon dioxide and carbon monoxide in the air can be effectively absorbed; after fresh air passes through the chemical filtering system, greenhouse gases such as carbon dioxide and carbon monoxide in the fresh air can be effectively filtered and isolated, and then the situation that the greenhouse gases enter the stack room and cause irreversible damage to articles such as classics in the stack room is avoided; and the storage time of classics and other articles is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of environmental control systems, in particular to an underground constant temperature and humidity special storage cave environment control system and a control method thereof. Background Art

[0002] The main problems currently facing cultural heritage books and manuscripts are: mildew, insect infestation, acidification, fire, etc. The occurrence of these problems is the result of the combined action of multiple factors. Among them, temperature and relative humidity are the main factors for measuring the preservation status of cultural heritage. Temperature and humidity influence and interact with each other under certain conditions; the aging speed of various book materials will be affected by them.

[0003] In the existing technology, the storage environment of cultural classics has been studied in depth, and it is pointed out that when the temperature rises from 15℃ to 20℃, the paper and silk historical and cultural heritage will be damaged due to the cellulose hydrolysis reaction speed inside it accelerating by 250%. Temperature also has the most direct impact on the growth and reproduction of harmful organisms. As the temperature rises, the biochemical reaction speed in the cells of harmful organisms accelerates. Therefore, it is more beneficial for most historical and cultural heritage to be preserved under low temperature conditions;

[0004] Compared with temperature, humidity has a greater impact on cultural heritage materials. When humidity increases, cultural heritage made of organic materials, in particular, absorbs more moisture, and is more susceptible to mold and insect infestation. At the same time, the rate of photooxidation is related to humidity. Under high humidity conditions, cultural heritage ages faster. Therefore, strict control of temperature and humidity is of great significance to the "longevity" of cultural heritage. Therefore, a constant temperature and humidity preservation system is required for the preservation of cultural heritage.

[0005] However, among the current projects for preserving paper and other items, there are relatively few underground special storage caverns. Since underground special storage caverns are mainly arranged underground in tunnel and linear styles with a deep burial depth, various fire protection systems are complicated to set up and are expensive. Those that are not particularly important and have high requirements are rarely set up. In addition, when designing underground special storage caverns, the constant temperature and humidity preservation system in the cavern is also relatively important, and the requirements for the constant temperature and humidity system are also high. The existing system also has shortcomings.

[0006] In summary, in order to solve the technical problems raised in this article, the present invention proposes an underground constant temperature and humidity special storage cave environment control system and a control method thereof. Summary of the invention

[0007] The present invention proposes an underground constant temperature and humidity special storage cave environment control system, the environment control system includes an air inlet and an air outlet; the environment control system includes: an air supply system and a return air system; the air supply system includes an air supply duct, and the return air system includes a return air duct;

[0008] The air supply system includes: a primary filter module, which is arranged at the entrance of the air supply duct and performs primary filtration on the fresh air;

[0009] Medium efficiency filter module: Fresh air passes through the primary filter module and then enters the medium efficiency filter module, which is used to perform secondary filtration on the fresh air;

[0010] The first-level surface cooling module is used to cool the fresh air. After passing through the medium-efficiency filter module, the fresh air enters the first-level surface cooling module. There is a cold water pan inside the first-level surface cooling module.

[0011] Rotary dehumidification module: after the fresh air passes through the primary surface cooling module, it enters the rotary dehumidification module, which is used to dehumidify the fresh air;

[0012] Secondary surface cooling module: after the fresh air passes through the rotary dehumidification module, it enters the secondary surface cooling module, which is used to fine-tune the temperature of the fresh air;

[0013] Sub-high efficiency filter module, the sub-high efficiency filter module is used to re-filter the particles in the fresh air that passes through the secondary surface cooling module; when the fresh air passes through the sub-high efficiency filter module, it enters the cavern;

[0014] The primary filter module, the medium filter module, the primary surface cooling module, the rotary dehumidification module, the secondary surface cooling module and the sub-high efficiency filter module are connected in series in the air supply duct;

[0015] The return air system comprises:

[0016] The return air fan is connected with the tunnel, and the return air fan draws out the air in the tunnel; the air in the tunnel flows out through the return air duct, and the return air duct is connected with the supply air duct, and the connection point between the return air duct and the supply air duct is located at the air inlet of the supply air duct.

[0017] As a preferred solution of the present application, a chemical filtration system is provided between the primary filtration module and the medium filtration module, and a mixture of water and silicon dioxide is provided in the chemical filtration system.

[0018] As a preferred solution of the present application; an electric auxiliary heating device is provided in the rotary dehumidification module, an exhaust port and an air inlet are provided on the electric auxiliary heating device, an exhaust fan is provided at the exhaust port, and an exhaust fan is provided at the air inlet.

[0019] As a preferred solution of the present application, a primary filter module is provided in the return air duct, and a heat pipe recovery device is provided in both the return air duct and the supply air duct.

[0020] As a preferred solution of the present application; temperature sensors are provided in the air supply duct and the return air duct, an electric regulating valve is provided in the cold water coil, and an electric regulating valve is provided in the rotary dehumidification module.

[0021] As a preferred solution of the present application; the air supply duct and the return air duct are provided with an air duct cold preservation system inside, the air duct cold preservation system comprises a moisture-proof and anti-corrosion surface centrifugal glass wool board, and the air duct cold preservation system is used to prevent condensation from occurring in the return air duct and the air supply duct; and the formula for preventing condensation in the return air duct and the air supply duct is;

[0022]

[0023] in;

[0024] δm is the anti-condensation thickness;

[0025] λ is the thermal conductivity of the cold-insulating material;

[0026] t1 is the temperature of the air in the duct;

[0027] t2 is the dry bulb temperature of the air that the outer surface of the cold insulation material contacts;

[0028] tb is the dew point temperature of the air that the outer surface of the cold insulation material contacts.

[0029] As a preferred solution of the present application; a water pipe cold preservation system is set in the water pipes used in the first-level surface cooling module, the second-level surface cooling module and the rotary dehumidification module, and the water pipe cold preservation system adopts an ultra-fine centrifugal glass wool tube shell; the water pipe cold preservation system is used to prevent condensation in the water pipes, wherein the calculation formula for preventing condensation in the water pipes is;

[0030]

[0031] in;

[0032] d is the outer diameter of the pipe before insulation;

[0033] δm is the anti-condensation thickness;

[0034] λ is the thermal conductivity of the cold-insulating material;

[0035] t1 is the temperature of water in the water pipe;

[0036] t2 is the dry bulb temperature of the air that the outer surface of the cold insulation material contacts;

[0037] tb is the dew point temperature of the air that the outer surface of the cold insulation material contacts.

[0038] An underground constant temperature and humidity special storage cave environment control method, the method is applicable to the above-mentioned underground constant temperature and humidity special storage cave environment control system; the method comprises:

[0039] S1: When the constant temperature and humidity system is in use, the air supply system is working, and the air blower draws fresh air from the outside into the air supply duct. After the fresh air enters the air supply duct, it will first contact the primary filter module. The primary filter module is made of non-woven fabric and filters large particles of impurities in the outside air, such as dust and pollen.

[0040] S2: After the fresh air enters the primary filter module, it contacts the medium filter module, where the medium filter module uses bag-type glass fiber material. The medium filter module filters dust, pollen, and bacteria in the fresh air, and the medium filter module filters dust particles between 1-5 microns to further filter the fresh air;

[0041] S3: Then the fresh air reaches the primary cooling module. Especially in summer, when the outside temperature is high, when the outside air enters the primary cooling module, the primary cooling module adopts water cooling to absorb the heat of the air flowing through the outside of the cooling module, thereby cooling the air.

[0042] S4: After the fresh air passes through the primary surface cooling module, it flows through the primary surface cooling module and enters the rotary dehumidification module. The rotary dehumidification module uses a rotary wheel made of solid desiccant to perform rotary dehumidification. When the air flows through these channels, it exchanges heat and moisture with the channel wall. The channel wall itself contains solid desiccant. When it is cooled by the air, its corresponding water vapor partial pressure is less than the water vapor partial pressure of the treated air, and the water vapor is adsorbed into the desiccant.

[0043] S5: After passing through the initial module of the rotor, the fresh air enters the secondary surface cooling module. The secondary surface cooling module cools down the heated fresh air through the intelligent control system set inside it, so that the temperature of the fresh air reaches the required temperature inside the library;

[0044] S6: After the fresh air passes through the secondary surface cooling module, it enters the sub-high efficiency filtration module. The sub-high efficiency filtration module filters the fresh air three times to further reduce the dust and fine impurity particles in the fresh air. After passing through the sub-high efficiency filtration module, the fresh air enters the library, and the fresh air replenishes the gas in the library. At the same time, the return air fan in the return air system works to extract the gas in the library, and cooperates with the air supply system to achieve air replacement in the library.

[0045] The beneficial effects of the present invention are as follows:

[0046] A chemical filtration system is arranged between the primary filtration module and the medium filtration module, and a mixture of water and silica is arranged inside the chemical filtration system. The silica is meteorological silica, and fumed silica has strong hydrophobicity. When water and fumed silica are mixed, the fumed silica will wrap the outer layer of each small water droplet to form a substance that looks like a solid but is actually mostly water. Each silica particle is surrounded by water droplets. This structure gives the mixture a large surface area, thereby enhancing its adsorption capacity. The adsorption capacity of the mixture enables it to effectively absorb pollutants in the air, such as greenhouse gases such as carbon dioxide and carbon monoxide. Therefore, after the fresh air passes through the chemical filtration system, it can effectively filter and isolate greenhouse gases such as carbon dioxide and carbon monoxide in the fresh air, thereby preventing greenhouse gases from entering the library and causing irreversible damage to items such as classics in the library, thereby increasing the preservation time of items such as classics. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a system flow chart of the present invention;

[0048] Figure 2 is a system flow chart of the present invention;

[0049] Figure 3 is a flow chart of the method in the present invention; DETAILED DESCRIPTION

[0050] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0051] Embodiment 1:

[0052] An underground constant temperature and humidity special storage cave environment control system, the environment control system includes an air inlet and an air outlet; the environment control system includes: an air supply system and a return air system; the air supply system includes an air supply duct, and the return air system includes a return air duct;

[0053] The air supply system includes: a primary filter module, which is arranged at the entrance of the air supply duct and performs primary filtration on the fresh air;

[0054] Medium efficiency filter module: Fresh air passes through the primary filter module and then enters the medium efficiency filter module, which is used to perform secondary filtration on the fresh air;

[0055] The first-level surface cooling module is used to cool the fresh air. After passing through the medium-efficiency filter module, the fresh air enters the first-level surface cooling module. There is a cold water pan inside the first-level surface cooling module.

[0056] Rotary dehumidification module: after the fresh air passes through the primary surface cooling module, it enters the rotary dehumidification module, which is used to dehumidify the fresh air;

[0057] Secondary surface cooling module: after the fresh air passes through the rotary dehumidification module, it enters the secondary surface cooling module, which is used to fine-tune the temperature of the fresh air;

[0058] Sub-high efficiency filter module, the sub-high efficiency filter module is used to re-filter the particles in the fresh air that passes through the secondary surface cooling module; when the fresh air passes through the sub-high efficiency filter module, it enters the cavern;

[0059] The primary filter module, the medium filter module, the primary surface cooling module, the rotary dehumidification module, the secondary surface cooling module and the sub-high efficiency filter module are connected in series in the air supply duct;

[0060] The return air system comprises:

[0061] The return air fan is connected to the cavern, and the return air fan extracts the air in the cavern; the air in the cavern flows out through the return air duct, and the return air duct is connected to the supply air duct, and the connection point between the return air duct and the supply air duct is located at the air inlet of the supply air duct;

[0062] A chemical filtration system is provided between the primary filtration module and the medium filtration module, wherein a mixture of water and silicon dioxide is provided in the chemical filtration system;

[0063] The specific workflow is as follows;

[0064] When the constant temperature and humidity system is in use, the air supply system works. The air supply system includes a blower arranged inside the air supply duct. The blower draws fresh air from the outside into the air supply duct. After the fresh air enters the air supply duct, it will first contact the primary filter module. The primary filter module is made of non-woven fabric and is used for large particles of impurities in the outside air, such as dust, pollen, etc. It can effectively filter dust particles larger than 5 microns; so that the fresh air is initially filtered; then the fresh air enters the primary filter module. After entering the primary filter module, it contacts the medium filter module, where the medium filter module uses bag-type glass fiber material. After the fresh air passes through the medium-efficiency filter module, the fresh air is mainly used to capture medium-sized particles in the air, such as dust, pollen, bacteria, etc., and the medium-efficiency filter module can filter dust particles between 1-5 microns to further filter the fresh air; after the fresh air is filtered twice, the fresh air reaches the primary surface cooling module. Especially in summer, the outside temperature is high. When the external gas enters the primary surface cooling module, the primary surface cooling module adopts water cooling. Cold water flows in the pipes inside the cold water pan to absorb the heat of the air flowing through the outside of the surface cooler, thereby cooling the air; after the fresh air passes through the primary surface cooling module , the fresh air flows through the first-level surface cooling module and enters the rotary dehumidification module. The rotary dehumidification module uses a rotor made of solid desiccant to perform rotary dehumidification; when the air flows through these channels, it exchanges heat and moisture with the channel wall. The channel wall itself contains solid desiccant, which is cooled by the air. Its corresponding water vapor partial pressure is less than the water vapor partial pressure of the treated air, and the water vapor is adsorbed into the desiccant; the initial module of the rotary wheel is suitable for the rainy season. In an environment with a large air depth, the fresh air after cooling can be dehumidified to avoid high humidity in the fresh air when the fresh air enters the library; and when the fresh air passes through the rotary dehumidification module, because the rotary dehumidification module is in the dehumidification During the wet process, the solid desiccant absorbs moisture in the air, and the latent heat of vaporization released will increase the temperature of the treated air. At this time, after the fresh air passes through the initial module of the rotor, it enters the secondary surface cooling module. The secondary surface cooling module can cool down the fresh air after the temperature rises through the intelligent control system set inside it, so that the temperature of the fresh air reaches the required temperature inside the library; avoid the problem of temperature rise or fall in the library after the fresh air enters the library; after the fresh air passes through the secondary surface cooling module, the fresh air enters the sub-high efficiency filtration module, and the sub-high efficiency filtration module filters the fresh air three times. The sub-high efficiency filter is for particles with a diameter ≥0.5μm particles are effectively filtered, further reducing the dust and fine impurity particles in the fresh air. When the fresh air enters the library after passing through the sub-high efficiency filter module, the fresh air replenishes the gas in the library. At the same time, the return air fan in the return air system works to extract the gas in the library, and cooperates with the air supply system to replace the air in the library. The process is that the return air fan works to extract the gas in the library into the return air duct, and then through the return air duct, the gas in the library enters the mixed air phase set at the entrance of the primary filter module and the air supply duct, and the gas in the library is mixed with the fresh air entering the air supply duct. After mixing, the primary filter module is used to form a closed loop, so that the gas in the library can be exchanged while ensuring that the temperature and humidity in the library remain unchanged, in a constant temperature and humidity state, thereby avoiding the problem of damage to the classics in the library.

[0065] And by setting a chemical filtration system between the primary filtration module and the medium filtration module, a mixture of water and silica is set inside the chemical filtration system, and the silica is meteorological silica, and gas-phase silica has strong hydrophobicity; when water and gas-phase silica are mixed, the gas-phase silica will wrap the outer layer of each small water droplet, forming a substance that looks like a solid but is actually mostly water; each silica particle is wrapped around water droplets, and this structure makes the mixture have a large surface area, thereby enhancing its adsorption capacity; the adsorption capacity of the mixture enables it to effectively absorb pollutants in the air, such as greenhouse gases such as carbon dioxide and carbon monoxide; and then, after the fresh air passes through the chemical filtration system, it can effectively filter and isolate greenhouse gases such as carbon dioxide and carbon monoxide in the fresh air, thereby preventing greenhouse gases from entering the library and causing irreversible damage to items such as classics in the library; thereby increasing the preservation time of items such as classics.

[0066] Embodiment 2:

[0067] The rotary dehumidification module is provided with an electric auxiliary heating device, an air outlet and an air inlet are provided on the electric auxiliary heating device, an exhaust fan is provided at the air outlet, and an exhaust fan is provided at the air inlet;

[0068] The return air duct is provided with a primary filter module, and the return air duct and the supply air duct are both provided with a heat pipe recovery device;

[0069] The principle is as follows;

[0070] On the basis of the above embodiment, an electric auxiliary heating device is arranged in the rotary dehumidification module, and an air outlet and an air inlet are arranged on the electric auxiliary heating device. When the rotary dehumidification module dehumidifies the moisture in the fresh air, the electric auxiliary heating device performs auxiliary heating on the fresh air, so that in the process of the rotary dehumidification module dehumidifying the fresh air, the electric auxiliary heating device heats the fresh air, improves the transpiration effect of the fresh air, makes the water vapor in the fresh air evaporate, and the evaporated water vapor is discharged through the exhaust fan, thereby improving the effect of removing moisture in the fresh air. After the moisture in the fresh air is removed, the fresh air enters the secondary surface cooling module, and the heated fresh air is cooled down, so that the temperature entering the bookcase is kept at a constant temperature.

[0071] And in the process again, the exhaust fan on the electric auxiliary heating device extracts the gas exhausted by the electric auxiliary heating device, so that the gas carrying water vapor exhausted by the electric auxiliary heating device returns to the air supply duct, and the water vapor remains outside; thereby avoiding the problem that the fresh air that has undergone multi-stage filtration cannot be reused after being exhausted, thereby improving the constant temperature and humidity effect of the fresh air on the book library; when the return air duct in the return air system replaces and extracts the gas in the book library, a primary filter module is arranged in the return air duct, and the primary filter module in the return air duct is the same as the primary filter module in the supply air duct, and the primary filter module in the return air duct filters the return air in the book library, After filtration, the return air in the library is mixed with the fresh air and enters the primary filter module in the air supply duct again, thereby improving the filtering effect of the return air in the library. In addition, heat pipe recovery devices are arranged in both the return air duct and the air supply duct. The fresh air is in the heat pipe recovery device, so that the heat recovery section first recovers the heat of the return air, and then passes through the first-level surface cooling (supply and return water temperature 3℃ / 8℃) to cool it down to 6℃, and then mixes with part of the indoor return air once and passes through the rotor initial module for dehumidification, and then passes through the second-level surface cooling to the interior of the library. During the process, the electric auxiliary heating device and the humidifier arranged behind the sub-high efficiency filter fine-tune the temperature and humidity in the library to achieve the effect of constant temperature and humidity.

[0072] Embodiment three:

[0073] The air supply duct and the air return duct are both provided with temperature sensors, the cold water coil is provided with an electric regulating valve, and the rotary dehumidification module is provided with an electric regulating valve;

[0074] The principle is as follows;

[0075] By setting a temperature sensor in the return air duct, the room temperature inside the bookstore is measured when the gas inside the bookstore is extracted, and the electric regulating valve of the cold water pan is controlled and adjusted to ensure that the required indoor temperature is reached. When the temperature in the return air duct is higher than the set value of 11°C, the opening of the electric regulating valve is increased, and when the temperature is lower than the set value of 9°C, the opening of the electric regulating valve is reduced;

[0076] A temperature sensor is installed in the air supply duct to control and adjust the electric regulating valve of the cold water pan to ensure that the design requirements are met. An electric regulating valve is installed in the rotary dehumidification module so that when the temperature in the air supply duct is higher than the set value of 11°C, the opening of the electric regulating valve is increased, and when the temperature is lower than the set value of 9°C, the opening of the electric regulating valve is reduced;

[0077] By installing electric regulating valves in the cold water pan and the rotary dehumidification module, the temperature of the fresh air inside the supply air duct can be controlled in real time. By installing a temperature sensor in the return air duct, the gas problems inside the library inside the return air duct can be detected in real time, and the temperature of the fresh air can be adjusted to maintain a constant temperature and humidity inside the library.

[0078] Embodiment 4:

[0079] The air supply duct and the return air duct are provided with an air duct cold insulation system inside, the air duct cold insulation system comprises a moisture-proof and anti-corrosion surface centrifugal glass wool board, and the air duct cold insulation system is used to prevent condensation from occurring in the return air duct and the air supply duct; and the calculation formula for the condensation prevention thickness of the return air duct and the air supply duct is;

[0080]

[0081] in;

[0082] δm is the anti-condensation thickness;

[0083] λ is the thermal conductivity of the cold-insulating material;

[0084] t1 is the temperature of the air in the duct;

[0085] t2 is the dry bulb temperature of the air that the outer surface of the cold insulation material contacts;

[0086] tb is the dew point temperature of the air that the outer surface of the cold insulation material contacts;

[0087] The principle is as follows;

[0088] The characteristics of the moisture-proof and anti-corrosion centrifugal glass wool board are: density 48kg / m3, thermal conductivity ≤0.034W / (m·K), surface heat transfer coefficient ≥8W / (m·K), glass fiber diameter ≤7μm, slag ball content is 0, hydrophobicity ≥98%, formaldehyde release ≤0.02mg / m3, TVOC release ≤0.5mg / (m2·h); water vapor permeability ≤1.15ng / N·s, veneer bursting strength should not be less than 2.8kg / cm2, longitudinal tensile strength 7.0kN / m, veneer without corrosion and delamination, etc.

[0089] By installing an air duct cold preservation system in the air supply duct and the return air duct, moisture-proof and anti-corrosion centrifugal glass wool boards are laid in the air supply duct and the return air duct, thereby reducing the condensation problem in the air supply duct and the return air duct, avoiding the condensation in the air supply duct and the return air duct causing the inner surface of the duct to become wet, increasing the resistance, and the fan needing to consume more energy to overcome the resistance, thereby increasing the energy consumption of the system, and avoiding condensation causing water accumulation or ice to block the air duct, causing the system to fail to operate normally; corrosion products blocking the pipe, causing the pipe to fail to transport air normally, etc.; thereby maintaining the temperature and humidity in the library at a constant temperature and humidity.

[0090] Embodiment five:

[0091] A water pipe cold preservation system is provided in the water pipes used in the first-level surface cooling module, the second-level surface cooling module and the rotary dehumidification module, and the water pipe cold preservation system adopts an ultra-fine centrifugal glass wool tube shell; the water pipe cold preservation system is used to prevent condensation in the water pipes, wherein the calculation formula for preventing condensation in the water pipes is;

[0092]

[0093] in;

[0094] d is the outer diameter of the pipe before insulation;

[0095] δm is the anti-condensation thickness;

[0096] λ is the thermal conductivity of the cold-insulating material;

[0097] 1 is the temperature of water in the water pipe;

[0098] t

[0099] t2 is the dry bulb temperature of the air that the outer surface of the cold insulation material contacts;

[0100] tb is the dew point temperature of the air that the outer surface of the cold insulation material contacts;

[0101] The principle is as follows;

[0102] A water pipe cooling system is set up in the water pipes used in the primary surface cooling module, the secondary surface cooling module and the rotary dehumidification module; the water pipe cooling system adopts ultra-fine centrifugal glass wool shell, and the ultra-fine centrifugal glass wool shell adopts a density of 64kg / m 3 (The condensate pipe is insulated with a density of 50kg / m 3) with ultra-fine centrifugal glass wool tube shell (high-strength moisture-proof and fire-proof ribbed aluminum foil as a vapor and moisture-proof layer), thermal conductivity ≤ 0.043W / m·K (average temperature 70℃), overall combustion performance level A non-combustible material; by using the above formula to calculate the water pipe to prevent condensation, the effect is better; thus avoiding condensation to cause cooling loss in the air supply system and return air system, which affects the temperature and humidity changes inside the library. At the same time, it is possible for condensation droplets to enter the interior of the air supply system and return air system, causing equipment failure and affecting the normal operation of the system.

[0103] Embodiment six:

[0104] An underground constant temperature and humidity special storage cave environment control method, the method is applicable to the above-mentioned underground constant temperature and humidity special storage cave environment control system; the method comprises:

[0105] S1: When the constant temperature and humidity system is in use, the air supply system is working, and the air blower draws fresh air from the outside into the air supply duct. After the fresh air enters the air supply duct, it will first contact the primary filter module. The primary filter module is made of non-woven fabric and performs primary filtration on large particles of impurities in the outside air, such as dust and pollen.

[0106] S2: After the fresh air enters the primary filter module, it contacts the medium filter module, where the medium filter module uses bag-type glass fiber material. The medium filter module filters dust, pollen, bacteria, etc. in the fresh air, and the medium filter module filters dust particles between 1-5 microns to further filter the fresh air;

[0107] S3: Then the fresh air reaches the primary cooling module. Especially in summer, when the outside temperature is high, when the outside air enters the primary cooling module, the primary cooling module adopts water cooling to absorb the heat of the air flowing through the outside of the cooling module, thereby cooling the air.

[0108] S4: After the fresh air passes through the primary surface cooling module, it flows through the primary surface cooling module and enters the rotary dehumidification module. The rotary dehumidification module uses a rotary wheel made of solid desiccant to perform rotary dehumidification. When the air flows through these channels, it exchanges heat and moisture with the channel wall. The channel wall itself contains solid desiccant. When it is cooled by the air, its corresponding water vapor partial pressure is less than the water vapor partial pressure of the treated air, and the water vapor is adsorbed into the desiccant.

[0109] S5: After the fresh air passes through the initial module of the rotor, it enters the secondary surface cooling module. The secondary surface cooling module can cool down the heated fresh air through the intelligent control system set inside it, so that the temperature of the fresh air reaches the required temperature inside the library;

[0110] S6: After the fresh air passes through the secondary surface cooling module, it enters the sub-high efficiency filtration module. The sub-high efficiency filtration module filters the fresh air three times to further reduce the dust and fine impurity particles in the fresh air. After passing through the sub-high efficiency filtration module, the fresh air enters the library, and the fresh air replenishes the gas in the library. At the same time, the return air fan in the return air system works to extract the gas in the library, and cooperates with the air supply system to achieve air replacement in the library.

[0111] The above shows and describes the basic principles, main features and advantages of the present invention; those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An underground constant temperature and humidity special storage cave environment control system, the environment control system includes an air inlet and an air outlet; characterized in that: The environmental control system includes: an air supply system and an air return system; the air supply system includes an air supply duct, and the air return system includes a return air duct; The air supply system includes: a primary filter module, which is arranged at the entrance of the air supply duct and performs primary filtration on the fresh air; Medium efficiency filter module: Fresh air passes through the primary filter module and then enters the medium efficiency filter module, which is used to perform secondary filtration on the fresh air; The first-level surface cooling module is used to cool the fresh air. After passing through the medium-efficiency filter module, the fresh air enters the first-level surface cooling module. There is a cold water pan inside the first-level surface cooling module. Rotary dehumidification module: after the fresh air passes through the primary surface cooling module, it enters the rotary dehumidification module, which is used to dehumidify the fresh air; Secondary surface cooling module: after the fresh air passes through the rotary dehumidification module, it enters the secondary surface cooling module, which is used to fine-tune the temperature of the fresh air; Sub-high efficiency filter module, the sub-high efficiency filter module is used to re-filter the particles in the fresh air that passes through the secondary surface cooling module; when the fresh air passes through the sub-high efficiency filter module, it enters the cavern; The primary filter module, the medium filter module, the primary surface cooling module, the rotary dehumidification module, the secondary surface cooling module and the sub-high efficiency filter module are connected in series in the air supply duct; The return air system comprises: The return air fan is connected with the tunnel, and the return air fan draws out the air in the tunnel; the air in the tunnel flows out through the return air duct, and the return air duct is connected with the supply air duct, and the connection point between the return air duct and the supply air duct is located at the air inlet of the supply air duct.

2. An underground constant temperature and humidity storage cave environment control system as claimed in claim 1, characterized in that: A chemical filtration system is arranged between the primary filtration module and the medium filtration module, and a mixture of water and silicon dioxide is arranged in the chemical filtration system.

3. An underground constant temperature and humidity storage cave environment control system as claimed in claim 2, characterized in that: The rotary dehumidification module is provided with an electric auxiliary heating device, on which an air outlet and an air inlet are provided, an exhaust fan is provided at the air outlet, and an exhaust fan is provided at the air inlet.

4. The underground constant temperature and humidity storage cave environment control system according to claim 1, characterized in that: The return air duct is provided with a primary filter module, and both the return air duct and the supply air duct are provided with a heat pipe recovery device.

5. The underground constant temperature and humidity storage cave environment control system as claimed in claim 3, characterized in that: The air supply duct and the air return duct are both provided with temperature sensors, the cold water coil is provided with an electric regulating valve, and the rotary dehumidification module is provided with an electric regulating valve.

6. An underground constant temperature and humidity storage cave environment control system as claimed in claim 5, characterized in that: The air supply duct and the return air duct are provided with an air duct cold preservation system inside, the air duct cold preservation system comprises a moisture-proof and anti-corrosion centrifugal glass wool board, and the air duct cold preservation system is used to prevent condensation from occurring in the return air duct and the air supply duct; and the formula for preventing condensation in the return air duct and the air supply duct is: in; δm is the anti-condensation thickness; λ is the thermal conductivity of the cold insulation material; t1 is the temperature of the air in the duct; t2 is the dry bulb temperature of the air that the outer surface of the cold insulation material contacts; tb is the dew point temperature of the air that the outer surface of the cold insulation material contacts.

7. The underground constant temperature and humidity storage cave environment control system according to claim 1, characterized in that: A water pipe cold preservation system is provided in the water pipes used in the first-level surface cooling module, the second-level surface cooling module and the rotary dehumidification module, and the water pipe cold preservation system adopts an ultra-fine centrifugal glass wool tube shell; the water pipe cold preservation system is used to prevent condensation in the water pipes, wherein the calculation formula for preventing condensation in the water pipes is; in; d is the outer diameter of the pipe before insulation; δm is the anti-condensation thickness; λ is the thermal conductivity of the cold insulation material; t1 is the temperature of water in the water pipe; t2 is the dry bulb temperature of the air that the outer surface of the cold insulation material contacts; tb is the dew point temperature of the air that the outer surface of the cold insulation material contacts.

8. An underground constant temperature and humidity special storage cave environment control method, the method is applicable to an underground constant temperature and humidity special storage cave environment control system as described in any one of claims 1 to 7; characterized in that: The method includes: S1: When the constant temperature and humidity system is in use, the air supply system is working, and the air blower draws fresh air from the outside into the air supply duct. After the fresh air enters the air supply duct, it will first contact the primary filter module. The primary filter module is made of non-woven fabric and filters large particles of impurities in the outside air, such as dust and pollen. S2: After the fresh air enters the primary filter module, it contacts the medium filter module, where the medium filter module uses bag-type glass fiber material. The medium filter module filters dust, pollen, and bacteria in the fresh air, and the medium filter module filters dust particles between 1-5 microns to further filter the fresh air; S3: Then the fresh air reaches the primary cooling module. Especially in summer, when the outside temperature is high, when the outside air enters the primary cooling module, the primary cooling module adopts water cooling to absorb the heat of the air flowing through the outside of the cooling module, thereby cooling the air. S4: After the fresh air passes through the primary surface cooling module, it flows through the primary surface cooling module and enters the rotary dehumidification module. The rotary dehumidification module uses a rotary wheel made of solid desiccant to perform rotary dehumidification. When the air flows through these channels, it exchanges heat and moisture with the channel wall. The channel wall itself contains solid desiccant. When it is cooled by the air, its corresponding water vapor partial pressure is less than the water vapor partial pressure of the treated air, and the water vapor is adsorbed into the desiccant. S5: After passing through the initial module of the rotor, the fresh air enters the secondary surface cooling module. The secondary surface cooling module cools down the heated fresh air through the intelligent control system set inside it, so that the temperature of the fresh air reaches the required temperature inside the library; S6: After the fresh air passes through the secondary surface cooling module, it enters the sub-high efficiency filtration module. The sub-high efficiency filtration module filters the fresh air three times to further reduce the dust and fine impurity particles in the fresh air. After passing through the sub-high efficiency filtration module, the fresh air enters the library, and the fresh air replenishes the gas in the library. At the same time, the return air fan in the return air system works to extract the gas in the library, and cooperates with the air supply system to achieve air replacement in the library.

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