Freeze drying and dehumidification air conditioning system for water-containing cultural relics with independent temperature and humidity control functions

Abstract

A dehumidification air conditioning system for freezing and drying water-containing cultural relics with independent temperature and humidity control functions, the dehumidification system includes a low-temperature freezing and dehumidification unit arranged outside the freeze-drying room and a dehumidification terminal unit arranged in the equipment room of the freeze-drying room and connected to the low-temperature freezing and dehumidification unit through a four-way reversing valve, the temperature control system includes a low-temperature freezing temperature control unit arranged outside the freeze-drying room and a temperature control terminal unit arranged in the equipment room of the freeze-drying room and connected to the low-temperature freezing temperature control unit through a first expansion valve, the dehumidification terminal unit and the temperature control terminal unit are used to perform corresponding dehumidification and temperature treatment on the air entering from the return air grille formed between the freeze-drying room and the equipment room, and then send the air into the freeze-drying room through the air supply port formed between the equipment room and the air guide space at the top of the freeze-drying room and the air supply orifice plate of the air guide space in turn. The present invention can not only freeze and dehumidify water-containing cultural relics, but also can freeze and preserve cultural relics for a long time in a low-humidity environment.

Description

Technical Field

[0001] The present invention relates to an air conditioning system for freezing and dehumidifying at normal pressure and low temperature, and in particular to an air conditioning system for freezing and drying and dehumidifying water-containing cultural relics with independent temperature and humidity control functions. Background Art

[0002] Cultural relics are witnesses of a country's history. my country's large-scale construction in recent years has led to an increasing number of unearthed cultural relics to be protected. Due to the constraints of the times and technology, most of my country's traditional ancient buildings are based on wood frames, and the main load-bearing material is also wood. These wooden buildings have been deposited for hundreds or even thousands of years and have extremely high artistic value and cultural relic research value. As time goes by, some wooden cultural relics have been buried underground for hundreds or even thousands of years, and have been eroded by groundwater and microorganisms in the soil for a long time, causing the cultural relics to suffer varying degrees of damage, and some are even completely destroyed. The cultural relics that have not been completely destroyed have become extremely fragile after being unearthed due to factors such as long soaking time, and are also easily damaged in the later period. The unearthed cultural relics must be dehydrated and dried before long-term preservation. After drying, the cultural relics used for display should have slight or no shrinkage, no breakage, and no color change, which puts high demands on the drying process. At present, the drying methods that are widely studied include natural drying, hot air drying, continuous vacuum drying and freeze drying. Due to their own limitations, hot air drying and vacuum drying can easily cause shrinkage and cracking of cultural relics. Natural drying takes a long time from immersion to complete drying. There are many methods for drying and dehydrating wooden cultural relics, but each drying and dehydration method has its own limitations, advantages and disadvantages. Freeze drying under normal pressure can effectively prevent shrinkage, cracking, and fracture during the drying process. The three-dimensional stability of the cultural relics after drying is better, and when stored in a low temperature environment, the cultural relics will not get damp, rot or deteriorate. It is a recommended drying and preservation method.

[0003] Patent No. ZL 201610006959.5 has provided a dehumidification air conditioning system and method for freeze-drying and preserving water-containing cultural relics. The dehumidification unit controls the dehumidification amount by adjusting the bypass air volume. Because the dehumidification evaporator has low dehumidification capacity, high power consumption, and poor humidity control accuracy of the bypass air valve, it cannot achieve a wide range of controllable and adjustable humidity. Based on the invention patent of patent ZL 2016 1 0006959.5, the present invention improves the dehumidification unit, adopts a variable frequency compressor to achieve a wide range of adjustable cooling capacity of the dehumidification evaporator, and adds a dehumidification enhancer in the dehumidification air circuit to increase the dehumidification capacity per unit cooling capacity, and finally achieves independent control of humidity. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions, which can not only freeze and dehumidify and dry water-containing cultural relics, but also freeze and preserve the cultural relics for a long time in a low-humidity environment.

[0005] The technical scheme adopted by the present invention is: a water-containing cultural relic freeze-drying dehumidification air-conditioning system with independent temperature and humidity control function, which is composed of a dehumidification system and a temperature control system for freeze-drying and freezing preservation of water-containing cultural relics in a freeze-drying room, characterized in that the dehumidification system and the temperature control system can independently control the temperature and humidity in the freeze-drying room, the dehumidification system includes a low-temperature freezing and dehumidification unit arranged outside the freeze-drying room and a dehumidification terminal unit arranged in the equipment room of the freeze-drying room and connected to the low-temperature freezing and dehumidification unit through a four-way reversing valve, the temperature control system includes a low-temperature freezing temperature control unit arranged outside the freeze-drying room and a temperature control terminal unit arranged in the equipment room of the freeze-drying room and connected to the low-temperature freezing temperature control unit through a first expansion valve, the dehumidification terminal unit and the temperature control terminal unit are used to perform corresponding dehumidification and temperature treatment on the air entering from the return air grille formed between the freeze-drying room and the equipment room, and then send it into the freeze-drying room through the air supply port formed between the equipment room and the air guide space at the top of the freeze-drying room and the air supply orifice plate of the air guide space.

[0006] The air conditioning system for freezing and drying water-containing cultural relics with independent temperature and humidity control functions of the present invention adopts a double-set air cooling system to independently control temperature and humidity, and can freeze and dehumidify water-containing cultural relics and freeze and preserve them for a long time in a low-humidity environment. It has multiple functions such as refrigeration, dehumidification, defrosting, temperature control, and constant temperature, and can be used for freeze drying and preservation of water-containing cultural relics. The present invention has the following beneficial effects:

[0007] (1) It has two working modes: freeze drying and cryopreservation, which can meet the requirements of different stages of cultural relics processing and can be directly used for museum cultural relics preservation and exhibition.

[0008] (2) The dehumidification is carried out by using a low-temperature refrigeration dehumidifier unit, which has high dehumidification efficiency and is controllable and adjustable during the dehumidification process. It can effectively avoid the disadvantages of large air volume and low dehumidification efficiency of traditional cold storage.

[0009] (3) The use of two sets of air cooling systems can achieve independent control of temperature and humidity, avoiding large fluctuations in temperature and humidity that may affect the processing of cultural relics.

[0010] (4) The use of low-temperature refrigeration dehumidification units and the configuration of front and rear air valves of the dehumidification enhancer ensures that the system is sealed during the defrosting process, reducing the risk of heat and moisture leakage and improving the dehumidification efficiency.

[0011] (5) This system adds a heat regenerator to the indoor dehumidification end of the low-temperature refrigeration dehumidification unit to form a dehumidification enhancer module (cold recovery) for recovering the cold of the dehumidification unit, which can reduce the overall refrigeration load of the unit and improve the dehumidification performance of the unit.

[0012] (6) This system can achieve the temperature control of the low-temperature refrigeration and dehumidification unit and the low-temperature refrigeration temperature control unit in the dehumidification and drying mode by regulating the solenoid valve, that is, by increasing the heat recovery of more indoor condensers to reduce the energy consumption of the built-in electric heater of the low-temperature refrigeration temperature control unit, the purpose of energy saving is achieved.

[0013] (7) This system can be used for the dehumidification and preservation of small cultural relics, as well as large cultural relics. It has a wide range of applications and can meet the dehumidification and preservation requirements of different types of cultural relics.

[0014] (8) This system has a high degree of automation and can effectively reduce the use of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions of the present invention.

[0016] In the picture

[0017] A: Freeze drying room B: Equipment room

[0018] 1: Low temperature refrigeration temperature control unit 2: Low temperature refrigeration dehumidification unit

[0019] 3: First expansion valve 4: Temperature control system evaporator

[0020] 5: Electric heater 6: Temperature control system fan

[0021] 7: Second expansion valve 8: Dehumidification system evaporator

[0022] 9: Front air valve 10: Regenerator

[0023] 11: First solenoid valve 12: Second solenoid valve

[0024] 13: Indoor condenser 14: Rear air valve or self-hanging shutter

[0025] 15: Air supply hole plate 16: Air guide space

[0026] 17: Main entrance of freeze-drying room 18: Air outlet

[0027] 19: Partition 20: Dehumidification system fan

[0028] 21: Return air grille 22: Condensate pipe

[0029] 23: Four-way reversing valve 24: Square box

[0030] 25: Return air channel 26: First pipeline

[0031] 27: Second pipeline 28: Third pipeline

[0032] 29: First partition 30: Second partition

[0033] 31: The third partition 32: The fourth pipeline

[0034] 33: Fifth pipeline 34: Fourth partition DETAILED DESCRIPTION

[0035] The following is a detailed description of the freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions of the present invention in conjunction with the embodiments and drawings.

[0036] The freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions of the present invention is composed of a dehumidification system and a temperature control system for freeze-drying and freezing the water-containing cultural relics in the freeze-drying room A, and the dehumidification system and the temperature control system can independently control the temperature and humidity in the freeze-drying room A. After the cultural relics are stored in the freeze-drying room A, they enter the freeze-drying stage and the freezing preservation stage in sequence. In the freeze-drying stage, there are a dehumidification drying mode and a defrosting drying mode that are circulated in sequence until the preserved cultural relics are completely dried, and then enter the freezing preservation stage. Among them, the freeze-drying stage is mainly realized by the dehumidification system and the temperature control system, and the freezing preservation stage is realized by the temperature control system.

[0037] like Figure 1 As shown, the dehumidification system includes a low-temperature refrigeration and dehumidification unit 2 arranged outside the freeze-drying room A and a dehumidification terminal unit arranged in the equipment room B of the freeze-drying room A and connected to the low-temperature refrigeration and dehumidification unit 2 through a four-way reversing valve 23. The temperature control system includes a low-temperature refrigeration temperature control unit 1 arranged outside the freeze-drying room A and a temperature control terminal unit arranged in the equipment room B of the freeze-drying room A and connected to the low-temperature refrigeration temperature control unit 1 through a first expansion valve 3. The dehumidification terminal unit and the temperature control terminal unit are used to perform corresponding dehumidification and temperature treatment on the air entering from the return air grille 21 formed between the freeze-drying room A and the equipment room B, and then send it into the freeze-drying room A through the air supply port 18 formed between the equipment room B and the air guide space 16 at the top of the freeze-drying room A, and the air supply orifice plate 15 of the air guide space 16.

[0038] The dehumidification terminal unit is arranged in the equipment room B through a square box 24, and the square box 24 is formed with a front air valve 9 for introducing the air to be treated on the side wall of the return air channel 25 connected to the return air grille 21, and the square box 24 is formed with a rear air valve or a self-hanging louver 14 for exporting the treated air on the side wall of the air supply port 18. The dehumidification terminal unit includes a heat regenerator 10 arranged in the square box 24, and the heat regenerator 10 is provided with an indoor condenser 13 and a dehumidification system fan 2 on one side corresponding to the rear air valve or the self-hanging louver 14. 0, a dehumidification system evaporator 8 is arranged on the side away from the indoor condenser 13, the refrigerant inlet of the indoor condenser 13 is connected to one port of the four-way reversing valve 23 through a first pipeline 26, the refrigerant outlet of the dehumidification system evaporator 8 is connected to another port of the four-way reversing valve 23 through a second pipeline 27, the other two ports of the four-way reversing valve 23 are respectively connected to the compressor and condenser in the low-temperature refrigeration and dehumidification unit 2, the refrigerant outlet of the indoor condenser 13 is connected to the refrigerant inlet of the dehumidification system evaporator 8 through a third pipeline 28, and the third pipeline 28 is provided with a second expansion valve 7. A condensation water pipe 22 for discharging condensed water is arranged at the bottom of the square box 24, and the water outlet of the condensation water pipe 22 is located outside the freeze-drying room A.

[0039] An air inlet channel is formed between the inlet pipe inlet of the regenerator 10 and the front air valve 9 through the first partition 29 and the second partition 30, and a return air channel is formed between the outlet of the inlet pipe of the regenerator 10 and the air inlet side of the dehumidification system evaporator 8 through the third partition 31. The air outlet side of the dehumidification system evaporator 8 is connected to the inlet of the outlet pipe of the regenerator 10, and the outlet of the outlet pipe of the regenerator 10 is connected to the air inlet side of the indoor condenser 13. The air outlet side of the indoor condenser 13 corresponds to the rear air valve or the self-hanging louver 14 through the dehumidification system fan 20.

[0040] A second solenoid valve 12 is provided on the first pipeline 26 at the refrigerant outlet adjacent to the indoor condenser 13, and a first solenoid valve 11 is provided between the first pipeline 26 and the third pipeline 28. When the refrigerant is required to pass through the indoor condenser 13 and the dehumidification system evaporator 8 in sequence, the first solenoid valve 11 is closed and the second solenoid valve 12 is opened. When the refrigerant is required to pass only through the dehumidification system evaporator 8, the second solenoid valve 12 is closed and the first solenoid valve 11 is opened.

[0041] The temperature control terminal unit includes a temperature control system evaporator 4 arranged in the equipment room B, the temperature control system evaporator 4 is equipped with an electric heater 5, the air inlet side of the temperature control system evaporator 4 is connected to the return air grille 21, the air outlet side of the temperature control system evaporator 4 is connected to the air supply port 18 through the temperature control system fan 6, the refrigerant inlet of the temperature control system evaporator 4 is connected to the condenser in the low-temperature refrigeration temperature control unit 1 through the fourth pipeline 32 and the first expansion valve 3 arranged on the fourth pipeline 32, and the refrigerant outlet of the temperature control system evaporator 4 is connected to the compressor in the low-temperature refrigeration temperature control unit 1 through the fifth pipeline 33. The temperature control system evaporator 4 is located at the lower part of the square box 24 of the dehumidification terminal unit, and the temperature control system evaporator 4 is divided into an air inlet side connected to the return air grille 21 and an air outlet side connected to the air supply port 18 by a fourth partition plate 34 whose upper end is fixed to the outer bottom surface of the square box 24 and whose lower end is fixed to the inner bottom surface of the equipment room B.

[0042] In the water-containing cultural relic freeze drying and dehumidification air conditioning system with independent temperature and humidity control functions of the present invention, the dehumidification terminal and the temperature control terminal can be as shown in the attached Figure 1 As shown, they are arranged in a stacked manner, and can also be placed side by side. However, it is preferred to install them in a hoisting manner, which does not occupy the bottom space and increases the space of freeze-drying room A.

[0043] The freeze-drying and dehumidifying air conditioning system for water-containing cultural relics with independent temperature and humidity control functions of the present invention, in the freeze-drying stage, in order to ensure the stable control of temperature and humidity in the freeze-drying room A, the dehumidification system and the temperature control system are independently turned on at the same time. Specifically, the low-temperature freezing temperature control unit 1 and its temperature control terminal unit and the low-temperature freezing dehumidification unit 2 and its dehumidification terminal unit are turned on to realize air circulation in the freeze-drying room.

[0044] The air circulation in the present invention means that the air in the freeze-drying room A is divided into two parts after passing through the return air grille 21, one part flows through the temperature control terminal unit, and the other part flows through the dehumidification terminal unit. The said flow through the temperature control terminal unit means that this part of the air passes through the temperature control system evaporator 4, the electric heater 5, and the temperature control system fan 6 in sequence; the said flow through the dehumidification terminal unit means that this part of the air passes through the front air valve 9, the regenerator 10, the dehumidification system evaporator 8 in sequence, and then returns to the regenerator 10, and then flows through the indoor condenser 13, the dehumidification system fan 20, and the rear air valve or self-hanging louver 14 in sequence. The two parts of air then pass through the air supply port 18 together to reach the air guide space 16 for mixing, and are sent back to the freeze-drying room through the air supply orifice plate 15.

[0045] The temperature control principle of the temperature control system in the present invention refers to that the air circulating through the temperature control system evaporator 4 is cooled by starting the temperature control system fan 6 in the temperature control terminal unit to provide air flow power. The basic control of the temperature in the freeze-drying room A can be achieved by frequency conversion control of the low-temperature freezing temperature control unit 1, and the precise control of the temperature can be achieved by normally opening the low-temperature freezing temperature control unit 1 and the electric heater 5 (PID control).

[0046] The dehumidification principle of the dehumidification system described in the present invention refers to that the wet air near the dew point temperature first passes through the front air valve 9 and then performs heat exchange at the position of the regenerator 10 to achieve pre-cooling treatment, so that the air first reaches a near-saturated state, and then passes through the dehumidification system evaporator 8 of the dehumidification system for dehumidification (frost), and then passes through the regenerator 10 to reach the indoor condenser 13, and the indoor condenser 13 can heat up this part of the circulating air at a lower temperature to the set temperature control temperature requirement. The heating effect of the indoor condenser 13 can be achieved by automatically controlling the on and off of the first solenoid valve 11 and the second solenoid valve 12 to achieve control of the condensation heat recovery amount of the indoor condenser 13, thereby reducing the heating amount of the electric heater 5 built into the evaporator 4 of the temperature control system, and realizing stable control of the temperature in the freeze-drying room A under the joint action. The indoor condenser 13 mainly plays a role of supercooling for the dehumidification system, thereby improving the dehumidification energy efficiency of the dehumidification system. The on and off of the first solenoid valve 11 and the second solenoid valve 12 mainly depends on the outdoor temperature. When the outdoor temperature is high, 12 can be opened and 11 can be closed; when the outdoor temperature is low, 12 can be closed and 11 can be opened.

[0047] When the suction pressure of the compressor in the dehumidification system is too low and the wind resistance in the dehumidification terminal unit is too large, the defrosting and drying mode is entered. In the defrosting mode, the front air valve 9 and the rear air valve or the self-hanging shutter 14 are closed, and the hot fluorine defrosting can be achieved through the four-way reversing valve 23. After the frost layer condensed on the dehumidification system evaporator 8 melts, it flows to the condensation pipe 22 connected to the bottom layer of the square box 24 in the dehumidification terminal unit under the action of gravity, and is discharged from the freeze-drying room A. Of course, the traditional method of adding an electric heater in the dehumidification system evaporator and using electric heating to defrost should also be within the scope of protection of this patent.

[0048] The water-containing cultural relic freeze-drying and dehumidifying air-conditioning system with independent temperature and humidity control functions of the present invention can manually set the relevant parameters in different working modes, and the degree of automation is very high. The air temperature, humidity, dew point temperature, freezing coil temperature, equipment operation status, quality changes of water-containing cultural relics and process alarm information in the cultural relic freezing treatment room, that is, freeze-drying room A during the process can be automatically recorded and stored, meeting the needs of data monitoring during freeze-drying and long-term preservation of water-containing cultural relics, and is suitable for use in scientific research by cultural relic archaeology and protection units. The water-containing cultural relic freeze-drying and dehumidifying air-conditioning system with independent temperature and humidity control functions of the present invention solves the current situation that stress is easily generated during the drying process of cultural relics, causing the objects to dry and crack, and also solves the impact of temperature and humidity field fluctuations in the cultural relic treatment room of other systems on the treatment of cultural relics during the defrosting stage, and at the same time provides a method for drying and preserving cultural relics under low-temperature freezing conditions.

[0049] The first embodiment of the present invention: open the first solenoid valve and close the second solenoid valve, the indoor condenser participates in the refrigeration cycle, and the indoor condenser supercools the refrigerant flowing through it, which can effectively improve the dehumidification efficiency of the dehumidification system.

[0050] Another embodiment of the present invention: The dehumidification system shown in the attached figure can realize whether the indoor condenser participates in the refrigeration cycle by switching the first and second solenoid valves, but the indoor condenser and the first and second solenoid valves can also be removed on the basis of the existing structure, that is, the dehumidification outdoor unit is directly connected to the dehumidification system evaporator through the four-way reversing valve and the second expansion valve. The main reason is that the cultural relics freeze-drying room basically does not need to rely on the end of the dehumidifier system to heat up, and the low temperature environment of the cultural relics freeze-drying room is mainly achieved by the temperature control system, so directly removing the indoor condenser and the first and second solenoid valves can make the overall system more stable and reliable.

Claims

1. A freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions, which is composed of a dehumidification system and a temperature control system for freeze-drying and freezing the water-containing cultural relics in the freeze-drying room (A), characterized in that: The dehumidification system and the temperature control system can independently control the temperature and humidity in the freeze drying room (A). The dehumidification system comprises a low-temperature refrigeration dehumidification unit (2) arranged outside the freeze drying room (A) and a dehumidification terminal unit arranged in an equipment room (B) of the freeze drying room (A) and connected to the low-temperature refrigeration dehumidification unit (2) through a four-way reversing valve (23). The temperature control system comprises a low-temperature refrigeration temperature control unit (1) arranged outside the freeze drying room (A) and a dehumidification terminal unit arranged in an equipment room (B) of the freeze drying room (A) and connected to the low-temperature refrigeration dehumidification unit (2) through a four-way reversing valve (23). The dehumidification terminal unit and the temperature control terminal unit are used to respectively dehumidify and treat the air entering from the return air grille opening (21) formed between the freeze-drying room (A) and the equipment room (B), and then sequentially send the air into the freeze-drying room (A) through the air supply port (18) formed between the equipment room (B) and the air guide space (16) at the top of the freeze-drying room (A) and the air supply orifice plate (15) of the air guide space (16); The dehumidification terminal unit is arranged in the equipment room (B) through a square box (24), and the square box (24) is formed with a front air valve (9) for introducing the air to be treated on the side wall located on the side of the return air channel (25) connected to the return air grille opening (21), and the square box (24) is formed with a rear air valve or a self-hanging louver (14) for exporting the treated air on the side wall located on the side of the air supply port (18). The dehumidification terminal unit includes a heat regenerator (10) arranged in the square box (24), and the heat regenerator (10) is provided with an indoor condenser (13) on the side corresponding to the rear air valve or the self-hanging louver (14). ) and a dehumidification system fan (20), a dehumidification system evaporator (8) is arranged on a side away from the indoor condenser (13), the refrigerant inlet of the indoor condenser (13) is connected to one port of the four-way reversing valve (23) through a first pipeline (26), the refrigerant outlet of the dehumidification system evaporator (8) is connected to another port of the four-way reversing valve (23) through a second pipeline (27), the other two ports of the four-way reversing valve (23) are respectively connected to the compressor and condenser in the low-temperature refrigeration and dehumidification unit (2), and the refrigerant outlet of the indoor condenser (13) is connected to the refrigerant inlet of the dehumidification system evaporator (8) through a third pipeline (28); An air inlet passage is formed between the inlet pipe of the regenerator (10) and the front air valve (9) through the first partition (29) and the second partition (30), and a return air passage is formed between the outlet of the inlet pipe of the regenerator (10) and the air inlet side of the dehumidification system evaporator (8) through the third partition (31). The air outlet side of the dehumidification system evaporator (8) is connected to the inlet of the air outlet pipe of the regenerator (10), and the outlet of the air outlet pipe of the regenerator (10) is connected to the air inlet side of the indoor condenser (13). The air outlet side of the indoor condenser (13) corresponds to the rear air valve or the self-hanging louver (14) through the dehumidification system fan (20); A second solenoid valve (12) is provided on the first pipeline (26) at the refrigerant outlet adjacent to the indoor condenser (13), and a first solenoid valve (11) is provided between the first pipeline (26) and the third pipeline (28). When the refrigerant is required to pass through the indoor condenser (13) and the dehumidification system evaporator (8) in sequence, the first solenoid valve (11) is closed and the second solenoid valve (12) is opened; when the refrigerant is required to pass only through the dehumidification system evaporator (8), the second solenoid valve (12) is closed and the first solenoid valve (11) is opened.

2. The water-containing cultural relics freeze drying and dehumidification air conditioning system with independent temperature and humidity control function according to claim 1 is characterized in that: The third pipeline (28) is provided with a second expansion valve (7).

3. The freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions according to claim 1 is characterized in that: A condensate pipe (22) for discharging condensed water is arranged at the bottom of the square box (24), and a water outlet of the condensate pipe (22) is located outside the freeze-drying room (A).

4. The freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions according to claim 1 is characterized in that: The temperature control terminal unit comprises a temperature control system evaporator (4) arranged in the equipment room (B), the temperature control system evaporator (4) is equipped with an electric heater (5), the air inlet side of the temperature control system evaporator (4) is connected to the return air grille (21), the air outlet side of the temperature control system evaporator (4) is connected to the air supply port (18) through the temperature control system fan (6), the refrigerant inlet of the temperature control system evaporator (4) is connected to the condenser in the low-temperature refrigeration temperature control unit (1) through a fourth pipeline (32) and a first expansion valve (3) arranged on the fourth pipeline (32), and the refrigerant outlet of the temperature control system evaporator (4) is connected to the compressor in the low-temperature refrigeration temperature control unit (1) through a fifth pipeline (33).

5. The freeze-drying and dehumidifying air-conditioning system for water-containing cultural relics with independent temperature and humidity control functions according to claim 4 is characterized in that: The temperature control system evaporator (4) is located at the lower part of the square box (24) of the dehumidification terminal unit. The temperature control system evaporator (4) is divided into an air inlet side connected to the return air grille opening (21) and an air outlet side connected to the air supply port (18) by a fourth partition plate (34) whose upper end is fixed to the outer bottom surface of the square box (24) and whose lower end is fixed to the inner bottom surface of the equipment room (B).

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