Storage device with air cooling humidification evaporator

Abstract

The invention provides a storage device with an air-cooled humidifying evaporator, and relates to the technical field of constant-temperature and constant-humidity product control, the storage device comprises a water spraying type air-cooled humidifying evaporator, the water spraying type air-cooled humidifying evaporator comprises a support, the support is provided with a pipe body and a water receiving cover plate located above the pipe body, and the water receiving cover plate is provided with a water inlet and a water outlet. A plurality of water outlets are formed in the bottom of the inner cavity of the water receiving cover plate; a plurality of fins are connected between the outer surface of the pipe body and the support, and the two ends of the pipe body are connected with a refrigerant inlet and a refrigerant outlet respectively. According to the water spraying type air cooling humidification evaporator, after water is injected into the water receiving cover plate, the water is sprayed to the fins through the water outlet, reliable and stable humidification can be provided for the low-temperature cold dry environment, and the phenomena that due to the low-temperature and low-humidity environment or the high-temperature and high-humidity environment, the humidification capacity is poor, and the refrigeration effect is not ideal are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of constant temperature and humidity product control, and more particularly, to a storage device with an air-cooled humidifying evaporator. Background Art

[0002] The humidification systems on the existing market generally adopt electric heating steam humidification, ultrasonic humidification or humidification film humidification. These humidification methods can only meet their humidification requirements by intermittent humidification, which will cause the humidification amount to quickly reach the control requirement of the humidification target value. Then, when the refrigeration system starts to refrigerate, the humidity inside the product will quickly drop to a very low humidity value, and the humidity fluctuation range is relatively large. It is very difficult to ensure that the deviation value of the humidification accuracy is within a small range. Therefore, we make improvements and propose a storage device with an air-cooled humidifying evaporator. Summary of the Invention

[0003] The present invention provides a storage device with an air-cooled humidifying evaporator, including a water spraying air-cooled humidifying evaporator. The water spraying air-cooled humidifying evaporator includes a bracket, a pipe body is arranged on the bracket, and a water receiving cover plate is located above the pipe body. A plurality of water outlets are arranged at the bottom of the inner cavity of the water receiving cover plate; a plurality of fins are connected between the outer surface of the pipe body and the bracket, and a refrigerant inlet and a refrigerant outlet are respectively connected to both ends of the pipe body.

[0004] As a preferred technical solution of the present application, it further includes a storage cabinet. A back plate is installed inside the storage cabinet, and the back plate divides the inside of the storage cabinet into an air duct and a storage room. The water spraying air-cooled humidifying evaporator is arranged in the air duct. An air inlet corresponding to the position of the water spraying air-cooled humidifying evaporator is arranged on the back plate, and a plurality of air outlets are also opened on the back plate. A plurality of circulating fans are further arranged on the back of the back plate.

[0005] As a preferred technical solution of the present application, the storage cabinet is connected with a cabinet door, and a display screen and an LED lamp are arranged on the cabinet door.

[0006] As a preferred technical solution of the present application, one of the circulating fans is connected with an electric heating cover, and a PTC heater is arranged inside the electric heating cover.

[0007] As a preferred technical solution of the present application, an evaporation fan is arranged on the back of the back plate for docking, and the evaporation fan plays a role in blowing air.

[0008] As a preferred technical solution of the present application, the water spraying air-cooled humidifying evaporator is connected with a capillary tube and a refrigeration compressor. The capillary tube is connected with a drying filter, and a condenser is connected between the drying filter and the refrigeration compressor. The water spraying air-cooled humidifying evaporator, the capillary tube, the drying filter, the condenser and the refrigeration compressor form a refrigeration system.

[0009] As a preferred technical solution of the present application, a protective cover is provided inside the storage cabinet, a humidification water tank is provided inside the protective cover, a water injection port is provided on the humidification water tank, a water level detection part, a humidification water pump and a drainage pump are provided inside the humidification water tank, the humidification water pump is connected to the water receiving cover plate through a pipeline, and the evaporator water box is provided on the water spray type air-cooled humidification evaporator, and the evaporator water box is connected to the humidification water tank through a pipeline.

[0010] As a preferred technical solution of the present application, a plurality of temperature and humidity detection probes are provided on the back surface of the back plate, and an ammonia purification module is also provided on the back surface of the back plate.

[0011] As a preferred technical solution of the present application, a controller is connected between the temperature and humidity detection probe, the evaporation fan, the humidification water tank and the refrigeration compressor, and the controller controls the operating states of the temperature and humidity detection probe, the evaporation fan, the humidification water tank and the refrigeration compressor according to the actual temperature and humidity conditions inside the storage cabinet through a PID program.

[0012] As a preferred technical solution of the present application, a humidification step is further included, and the humidification step includes: the user sets the temperature and humidity, fills the humidification water tank with normal temperature pure water through the water injection port, after the water is full, the humidification water pump starts to operate and pump water, the normal temperature pure water is transported into the water receiving cover plate, and then flows from the water receiving cover plate to the fin surface, low-temperature and humid air is separated out, and the evaporation fan sends air through the air duct and the air outlet for humidification into the storage room. If the set temperature and humidity are reached in the first cycle, both the humidification water pump and the evaporation fan stop working; if the set temperature and humidity are not reached in the first cycle, the humidification water pump and the evaporation fan continue to work continuously, and after continuously cycling through the Nth cycle, until the set target temperature and humidity are reached, the operating state of the humidification system is automatically kept constant within a humidity fluctuation range of ±1% through the controller PID program algorithm.

[0013] Compared with the prior art, the beneficial effects of the present invention are: In the solution of the present application: In the present application, through the provided water spray type air-cooled humidification evaporator, after the water receiving cover plate is filled with water and then sprayed onto the fins through the water outlet, it can provide reliable and stable humidification for the low-temperature and dry environment, and avoid phenomena such as poor humidification ability and unsatisfactory refrigeration effect due to low-temperature and low-humidity or high-temperature and high-humidity environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the air-cooled humidification evaporator provided by the present application; Figure 2 It is provided by the present application Figure 1 The upward view structure schematic diagram; Figure 3 It is a schematic diagram of another perspective of the air-cooled humidification evaporator provided by the present application Figure 4 Schematic structural diagram of the storage device provided for this application; Figure 5 Schematic structural diagram of the backplane provided for this application; Figure 6 Schematic side sectional structure diagram of the storage cabinet provided for this application; Figure 7 Schematic diagram of the quality system provided for this application; Figure 8 Control circuit diagram provided for this application.

[0015] Labels in the figure: 1. Water injection port; 2. Water level detection part; 3. Humidification water tank; 4. Humidification water pump; 5. Drainage pump; 7. Evaporation fan; 8. Evaporator water box; 13. PTC heater; 14. Electric heating cover; 15. Circulation fan; 16. Air inlet; 17. Air outlet; 18. Ammonia purification module; 19. Temperature and humidity detection probe; 20. Backplane; 21. Storage cabinet; 211. Air duct; 212. Storage room; 22. Protective cover; 23. Storage drawer; 24. Spray type air-cooled humidification evaporator; 241. Water receiving cover plate; 242. Water outlet; 243. Bracket; 244. Fins; 245. Pipe body; 246. Refrigerant inlet; 247. Refrigerant outlet; 25. Capillary tube; 26. Drying filter; 27. Condenser; 28. Refrigeration compressor; 29. Cabinet door. Detailed implementation manners

[0016] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0017] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0018] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] Example 1, please refer to Figures 1-8, including a water-spraying air-cooled humidifying evaporator 24, the water-spraying air-cooled humidifying evaporator 24 includes a bracket 243, a tube body 245 and a water receiving cover plate 241 located above the tube body 245 are arranged on the bracket 243, and a plurality of water outlets 242 are arranged at the bottom of the inner cavity of the water receiving cover plate 241; a plurality of fins 244 are connected between the outer surface of the tube body 245 and the bracket 243, and the two ends of the tube body 245 are respectively connected with a refrigerant inlet 246 and a refrigerant outlet 247. After water is filled in the water receiving cover plate 241, it is sprayed on the fins 244 through the water outlet 242, which can provide reliable and stable humidification for the low-temperature cold and dry environment, and avoid the phenomenon of poor humidification capacity and unsatisfactory refrigeration effect due to the low-temperature and low-humidity or high-temperature and high-humidity environment.

[0020] Furthermore, it also includes a storage cabinet 21, which is provided with a storage drawer 23, and a back panel 20 is installed in the storage cabinet 21. The back panel 20 divides the storage cabinet 21 into an air duct 211 and a storage chamber 212. A water-spraying air-cooling humidifying evaporator 24 is arranged in the air duct 211, and an air inlet 16 corresponding to the position of the water-spraying air-cooling humidifying evaporator 24 is arranged on the back panel 20, and a plurality of air outlets 17 are also opened on the back panel 20, and a plurality of circulation fans 15 are also arranged on the back of the back panel 20; the effective circulation of air in the storage cabinet is realized, so that the temperature and humidity can be evenly distributed in the storage chamber, and the quality of the storage environment is improved; the reason is that the circulation fan 15 prompts the air to enter from the air inlet 16, and after the temperature and humidity are adjusted by the water-spraying air-cooling humidifying evaporator 24, it is blown out from the air outlet 17 to the storage chamber 212, thereby ensuring that the air is continuously circulated and renewed in the storage cabinet 21 to avoid large local temperature and humidity differences.

[0021] Furthermore, the storage cabinet 21 is connected to a cabinet door 29 , and a display screen and an LED light are provided on the cabinet door 29 , so that the user can intuitively view information such as temperature and humidity in the storage cabinet 21 .

[0022] Furthermore, one of the circulating fans 15 is connected to an electric heating hood 14, and a PTC heater 13 is arranged inside the electric heating hood 14; the air can be heated when necessary, thereby increasing the ability of the storage cabinet 21 to cope with different ambient temperature requirements and realizing a constant temperature function.

[0023] Furthermore, an evaporator fan 7 connected to the water-spraying air-cooled humidifying evaporator 24 is provided on the back side of the back plate 20, and the evaporator fan 7 plays the role of air supply; the evaporator fan 7 quickly transports the wet steam generated by the water-spraying air-cooled humidifying evaporator 24 to the storage chamber 21, so that the storage chamber 212 can reach the set humidity more quickly, shortening the humidification time.

[0024] Further, the water-spraying air-cooled humidifying evaporator 24 is connected to a capillary tube 25 and a refrigeration compressor 28. The capillary tube 25 is connected to a dryer filter 26. A condenser 27 is connected between the dryer filter 26 and the refrigeration compressor 28. The water-spraying air-cooled humidifying evaporator 24, the capillary tube 25, the dryer filter 26, the condenser 27, and the refrigeration compressor 28 form a refrigeration system. The refrigeration compressor 28 compresses the refrigerant, dissipates heat and liquefies it in the condenser 27, then filters impurities through the dryer filter 26, and enters the water-spraying air-cooled humidifying evaporator 24 to absorb heat and evaporate after throttling and reducing pressure through the capillary tube 25, thus realizing refrigeration through such a cycle.

[0025] Further, a protective cover 22 is provided inside the storage cabinet 21. A humidifying water tank 3 is provided inside the protective cover 22. A water injection port 1 is provided on the humidifying water tank 3. A water level detection part 2, a humidifying water pump 4, and a drainage pump 5 are provided inside the humidifying water tank 3. The humidifying water pump 4 is connected to the water receiving cover plate 241 through a pipeline. The water-spraying air-cooled humidifying evaporator 24 is provided with an evaporator water box 8, and the evaporator water box 8 is connected to the humidifying water tank 3 through a pipeline.

[0026] Further, a plurality of temperature and humidity detection probes 19 are provided on the back surface of the back plate 20. The temperature and humidity detection probes 19 collect data in real time, providing a basis for temperature and humidity control. An ammonia purification module 18 is also provided on the back surface of the back plate 20. The ammonia purification module 18 uses a negative ion generator, and the air quality of the storage environment can be improved through negative ions.

[0027] Further, a controller is connected between the temperature and humidity detection probes 19, the evaporation fan 7, the humidifying water tank 3, and the refrigeration compressor 28. The controller controls the operating states of the temperature and humidity detection probes 19, the evaporation fan 7, the humidifying water tank 3, and the refrigeration compressor 28 according to the actual temperature and humidity conditions inside the storage cabinet 21 through a PID program. The PID program can accurately calculate and control the operation of each component according to the data fed back by the temperature and humidity detection probes, so that the temperature and humidity can be quickly stabilized within the set range.

[0028] Further, a humidifying step is also included. The humidifying step includes: the user sets the temperature and humidity, fills the humidifying water tank 3 with normal-temperature pure water through the water injection port 1. After the water is full, the humidifying water pump 4 starts to operate and pump water. The normal-temperature pure water is transported into the water receiving cover plate 241, and then flows from the water receiving cover plate 241 to the surface of the fin 244, and low-temperature humid air is separated. The evaporation fan 7 sends air through the air duct 211 and the air outlet 17 to humidify the storage room 212. If the set temperature and humidity are reached in the first cycle, both the humidifying water pump 4 and the evaporation fan 7 stop working. If the set temperature and humidity are not reached in the first cycle, the humidifying water pump 4 and the evaporation fan 7 continue to work continuously. After continuously cycling through the Nth cycle like this until the set target temperature and humidity are reached, the operating state of the humidifying system is automatically kept constant within a humidity fluctuation range of ±1% through the controller PID program algorithm.

[0029] Humidification principle: Pure water at room temperature is pumped into the water receiving cover plate 241 through the humidification water pump 4, and then evenly distributed to the surface of the low-temperature fins 244 through the water outlet 242. The room-temperature pure water produces saturated 10°C low-temperature wet steam after continuous circulation, evaporation and heat exchange. The low-temperature wet steam is separated by the evaporation fan 7 and then supplied to the storage room 212 cabinet. Finally, the temperature and humidity are constantly controlled within the set target humidity range of ±1% through the PID program algorithm of the electronic controller to meet the constant humidity requirements of the storage room 212.

[0030] Example 2 further optimizes the storage device with an air-cooled humidifying evaporator provided in Example 1. Specifically, Figures 4-8 As shown, the temperature and humidity detection probe 19 integrates a temperature sensor and a humidity sensor; the temperature and humidity detection and display control logic includes: Temperature detection: When the number of available temperature sensors is greater than 2, if the A temperature sensor satisfies: |A temperature sensor value-total temperature sampling| / total temperature sampling ≥ 20%, then the A temperature sensor will not be adopted and will not be used to calculate the total temperature sampling. When the available temperature sensors are ≤ 2, the above logic will not be executed; if a temperature and humidity detection probe 19 fails, is short-circuited, disconnected, or exceeds the display range, it will be considered unavailable, otherwise it will be available; the reason is that by setting data screening rules, sensor data with excessive deviations is excluded to ensure that the temperature and humidity data used for calculation and control truly reflect the actual situation in the storage cabinet; Humidity detection: When the number of available humidity sensors is greater than 2, if humidity sensor A satisfies: |A humidity sensor value-total humidity sampling| / total humidity sampling≥20%, then humidity sensor A will not be adopted and will not be used to calculate the total humidity sampling. When the number of available humidity sensors is ≤2, the above logic will not be executed. If a humidity sensor fails, is short-circuited, opened, or exceeds the display range, it will be considered unavailable, otherwise it will be available.

[0031] Humidity control: When the humidity in the storage cabinet 21 is ≥ the set humidity + B22, the refrigeration compressor 28 is started for dehumidification; when the humidity in the storage cabinet 21 is ≤ the set humidity + B26, the refrigeration compressor 28 is stopped to exit dehumidification. The refrigeration compressor 28 must run for one minute each time it is started; When the humidity in the storage cabinet 21 is less than or equal to the set humidity B23, humidification is started; when the humidity in the cabinet is greater than or equal to the set humidity B27, humidification is stopped; During dehumidification, when the temperature is less than or equal to the set temperature -2.0 degrees Celsius / 3.6 degrees Fahrenheit, dehumidification is forced to stop and dehumidification is allowed to resume only when the temperature is ≥ the set temperature.

[0032] Note: After the refrigeration compressor 28 starts, if the humidity in the storage cabinet 21 is less than the set humidity, humidification is started; humidification is stopped until the humidity in the storage cabinet 21 is greater than the humidity set value. Also, in the refrigeration state, if the humidity in the storage cabinet 21 ≤ the set humidity - B23, the refrigeration compressor 28 is forced to stop until the humidity in the storage cabinet 21 ≥ the humidity set value, and then the normal temperature control state is restored. It is necessary to ensure that the time from the shutdown to the startup of the refrigeration compressor 28 is greater than B05; Exception: When powering on for the first time, the refrigeration compressor 28 in the refrigeration state is not restricted by this rule until the set temperature is reached and then this rule is executed; When the temperature in the storage cabinet 21 is greater than the set temperature + E3 parameter × 2, the refrigeration compressor 28 in the refrigeration state is not restricted by this condition until the set temperature is reached and then this rule is executed.

[0033] Humidity value display: It is displayed according to the average value of the actual temperature and humidity measured by the temperature and humidity detection probe 19. Initial power - on instructions: The actual humidity value measured by the temperature and humidity detection probe 19 is directly displayed within 10 minutes after power - on; After 10 minutes of power - on, the current display value is used as the initial value, which is the difference between the actual humidity value measured by the temperature and humidity detection probe 19 and the control value.

[0034] Example 3 further optimizes the storage device with an air - cooled humidifying evaporator provided in Example 1 or 2. Specifically, as Figure 4 shown, the humidification method includes the following steps: Set the target humidity and determine the first cycle corresponding to this target humidity; Operate the humidification system corresponding to the first cycle. The water - level detection part 2 consists of three float - type water - level switches, high, medium, and low, to control the water level of the humidification water tank 3. When the water level is low, the controller will automatically beep briefly and display the words "Please add water" to remind the user to manually add normal - temperature pure water. When the normal - temperature water is added to the high water level and the water tank is full, the LED light in the storage cabinet 21 will flash for 3S and the buzzer will beep long once, reminding the user that the added water volume meets the requirements. At the same time, if the user adds too much water, there is a water - receiving box on the back of the back panel 20 connected to the drainage pump 5. The excess water will be drained into the water - receiving box through the drainage pump 5, and then the water in the water - receiving box will be evaporated by the high - temperature and high - pressure exhaust pipe of the refrigeration compressor 28. Control the evaporation fan 7 and the humidification water pump 4 to operate continuously according to the actual situation, and start the refrigeration system and humidification. According to the humidification amount in the first cycle, cool and exchange heat the circulating pure water to the current water temperature, so that the water at the current water temperature is transported to the surface of the spray-type air-cooled humidification evaporator 24 by the humidification water pump 4 for evaporation heat exchange to obtain the actual humidity in the first cycle; continuously detect whether the actual humidity in the first cycle reaches the target humidity, and start the humidification amount in the first cycle or the humidification amount in the second cycle at intervals to control the current humidity within the deviation limit range of ±1% of the target humidity; when the actual humidity inside the storage cabinet 21 does not match the set target humidity, the humidification water pump 4 continues to start and pump water, and then the surface of the spray-type air-cooled humidification evaporator 24 continuously sprays water evenly. The water sprayed out from the surface of the spray-type air-cooled humidification evaporator 24 becomes cold water at a low temperature of 10 degrees after continuous cyclic evaporation and heat absorption, and this cycle continues until the humidity compensation condition is met. According to the humidity compensation value between the first humidity and the target humidity, start the humidification amount in the second cycle to obtain the target humidity; Start the humidification amount in the second cycle at intervals, and control the target humidity within the deviation limit range; the second cycle is set based on the humidity in the first cycle. At this time, the controller's PID program gives priority to humidity. The refrigeration compressor 28 of the refrigeration system stops refrigerating in the state of shutdown delay, and the humidification inside the storage cabinet 21 continues to humidify preferentially based on the humidity in the first cycle until the set target humidity is reached within the set time.

[0035] The humidification amount in the third cycle is automatically adjusted for humidification or dehumidification by the control logic of the controller PID, and then gradually stabilized within the deviation limit range of the set temperature and humidity to achieve the purpose of constant temperature and humidity in the storage cabinet 21.

[0036] The controller is connected to multiple temperature and humidity detection probes 19 inside the storage cabinet 21 to detect the average value in real time to control the on or off operating state.

[0037] The controller cooperates with the water level detection unit 2 to control the water level of the humidification water tank 3. When the water level is low, the controller will automatically beep once and display the words "Please add water" to remind the user to manually add normal temperature pure water. When the high water level is full, the LED light inside the storage cabinet 21 will flash for 3S and the buzzer will beep long once to remind the user that the added water is full, and at the same time, the words "Please add water" will disappear accordingly.

[0038] Start the humidification amount of the second cycle at intervals. The steps include: setting the target humidity as HS, setting the deviation range of the target humidity as HS±1%. When the current humidity H1 in the first cycle < HS, start the humidification amount of the second cycle and the evaporation fan 7; when the current humidity H2 in the second cycle < HS, start the humidification amount of the third cycle and the evaporation fan 7 to continue humidifying; when the current humidity HN in the Nth cycle ≥ HS, turn off the humidification amount of the (N + 1)th cycle and the evaporation fan 7; H1 represents the humidification amount corresponding to the first cycle, H2 represents the humidification amount corresponding to the second cycle, H3 represents the humidification amount corresponding to the third cycle, and HN represents the humidification amount corresponding to the Nth cycle.

[0039] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. The accompanying drawings show the preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields is equally within the scope of the patent protection of the present invention.

Claims

1. A storage device having an air-cooled humidifying evaporator, characterized in that: It comprises a water-spraying air-cooled humidifying evaporator (24), the water-spraying air-cooled humidifying evaporator (24) comprising a bracket (243), a tube body (245) and a water receiving cover plate (241) located above the tube body (245) are arranged on the bracket (243), and a plurality of water outlets (242) are arranged at the bottom of the inner cavity of the water receiving cover plate (241); a plurality of fins (244) are connected between the outer surface of the tube body (245) and the bracket (243), and the two ends of the tube body (245) are respectively connected to a refrigerant inlet (246) and a refrigerant outlet (247).

2. The storage device with an air-cooled humidifying evaporator according to claim 1, characterized in that: It also includes a storage cabinet (21), wherein a back panel (20) is installed in the storage cabinet (21), wherein the back panel (20) divides the storage cabinet (21) into an air duct (211) and a storage chamber (212), wherein the water-spraying air-cooling humidifying evaporator (24) is arranged in the air duct (211), wherein an air inlet (16) corresponding to the position of the water-spraying air-cooling humidifying evaporator (24) is arranged on the back panel (20), and a plurality of air outlets (17) are also opened on the back panel (20), and a plurality of circulation fans (15) are also arranged on the back side of the back panel (20).

3. The storage device with an air-cooled humidifying evaporator according to claim 2, characterized in that: The storage cabinet (21) is connected to a cabinet door (29), and a display screen and an LED light are provided on the cabinet door (29).

4. The storage device with an air-cooled humidifying evaporator according to claim 2, characterized in that: One of the circulating fans (15) is connected to an electric heating cover (14), and a PTC heater (13) is arranged in the electric heating cover (14).

5. The storage device with an air-cooled humidifying evaporator according to claim 2, characterized in that: An evaporation fan (7) connected to (204) is arranged on the back of the back plate (20), and the evaporation fan (7) has the function of supplying air.

6. The storage device with an air-cooled humidifying evaporator according to claim 5, characterized in that: The water-spraying air-cooled humidifying evaporator (24) is connected to a capillary tube (25) and a refrigeration compressor (28), the capillary tube (25) is connected to a drying filter (26), a condenser (27) is connected between the drying filter (26) and the refrigeration compressor (28), and the water-spraying air-cooled humidifying evaporator (24), the capillary tube (25), the drying filter (26), the condenser (27) and the refrigeration compressor (28) form a refrigeration system.

7. The storage device with an air-cooled humidifying evaporator according to claim 6, characterized in that: The storage cabinet (21) is provided with a protective cover (22), a humidifying water tank (3) is provided in the protective cover (22), a water inlet (1) is provided on the humidifying water tank (3), a water level detection unit (2), a humidifying water pump (4) and a drainage pump (5) are provided in the humidifying water tank (3), the humidifying water pump (4) is connected to the water receiving cover plate (241) through a pipeline, and the water-spraying air-cooled humidifying evaporator (24) is provided with an evaporator water box (8), and the evaporator water box (8) is connected to the humidifying water tank (3) through a pipeline.

8. The storage device with an air-cooled humidifying evaporator according to claim 7, characterized in that: A plurality of temperature and humidity detection probes (19) are arranged on the back side of the back plate (20), and an ammonia purification module (18) is also arranged on the back side of the back plate (20).

9. The storage device with an air-cooled humidifying evaporator according to claim 8, characterized in that: A controller is connected between the temperature and humidity detection probe (19), the evaporating fan (7), the humidifying water tank (3) and the refrigeration compressor (28), and the controller controls the operating states of the temperature and humidity detection probe (19), the evaporating fan (7), the humidifying water tank (3) and the refrigeration compressor (28) according to the actual temperature and humidity conditions in the storage cabinet (21) through a PID program.

10. The storage device with an air-cooled humidifying evaporator according to claim 9, characterized in that: The humidification step includes: the user sets the temperature and humidity, and fills the humidification water tank (3) with pure water at room temperature through the water filling port (1). After the water is filled, the humidification water pump (4) starts to operate to pump water, and the pure water at room temperature is transported to the water receiving cover plate (241), and then flows from the water receiving cover plate (241) to the surface of the fin (244), and the low-temperature humid air is separated. The evaporation fan (7) sends humidified air to the storage chamber (212) through the air duct (211) and the air outlet (17). If the set temperature and humidity are reached in the first cycle, the humidification water pump (4) and the evaporation fan (7) both stop working; if the set temperature and humidity are not reached in the first cycle, the humidification water pump (4) and the evaporation fan (7) continue to work continuously, and continue to work in this way for the Nth cycle until the set target temperature and humidity are reached. The controller PID program algorithm automatically keeps the operating state of the humidification system constant within the humidity fluctuation range of ±1%.

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