A positive pressure type humidity control device for a museum showcase micro-environment

Abstract

The present application relates to a kind of museum showcase micro-environment positive pressure type humidity control equipment applied to showcase humidity control field, through the synergistic operation of positive pressure type dual-mode semiconductor-electrolyte membrane composite dehumidification and intelligent humidification system, the control precision of effective maintenance humidity in showcase, realize the efficient stable control of showcase environment, and the use of this humidity control equipment, the sealing requirement of showcase is lower, especially suitable for old showcase that has not been sealed reconstruction, thereby effectively reduce the cost of the sealing of showcase regular maintenance, in addition, by the setting of multiple split cotton swabs, the cotton swab can be adjusted to be layered after the device is used for a period of time Expand, on the one hand, increase the water absorption area of cotton swab, on the other hand, the cotton swab can absorb water from the inner layer, thereby effectively alleviate the water quality scaling caused by water delivery decline problem, compared with prior art, can effectively prolong the interval of replacing cotton swab, while effectively improve the utilization rate of cotton swab.

Description

Technical Field

[0001] This invention relates to a positive pressure humidity control device, and more particularly to a positive pressure humidity control device for the microenvironment of museum display cases, applicable to the field of display case humidity control. Background Technology

[0002] In the field of cultural relic preservation, the concept of preventative conservation has become an industry consensus. Its core lies in providing a "stable and clean" preservation environment for cultural relics to minimize or delay changes in their physical and chemical properties, thereby achieving long-term preservation. A "stable" environment specifically refers to precisely controlling environmental factors such as temperature and humidity to ensure these indicators remain stable within appropriate ranges, avoiding significant fluctuations that could damage the relics. Humidity, as a key factor affecting the quality of cultural relic preservation, plays a crucial role in the preservation of most relic materials. Therefore, in the temperature and humidity control of the cultural relic storage environment, humidity control should be the primary consideration.

[0003] However, the central air conditioning systems commonly used in museums today mainly focus on temperature regulation, and there is a relative lack of effective means to control humidity. For example, the specification of Chinese patent CN115644644A proposes a constant temperature display case for museum exhibitions.

[0004] Furthermore, humidity control within museum glass display cases generally requires the case's airtightness to meet national standards (GBT36110-2018 "Sealing Performance and Testing of Cultural Relics Display Cases") before humidity control can proceed. If these standards are not met, the display case's airtightness needs to be modified (by adding sealant, sealing strips, etc.). This modification is highly technical and cannot be solved simply by applying sealant or replacing sealing strips. After modification, retesting according to the national standard's testing methods is required, and this process is repeated until the airtightness meets the standards. Before conducting the airtightness test, it is necessary to contact relevant museum departments to move the artifacts from the display case. This requires applications from various departments within the museum, ultimately leading to the artifacts' removal from the exhibition. This process is time-consuming, labor-intensive, and costly, especially for older display cases that require periodic airtightness testing.

[0005] Therefore, we propose a device or method that does not require frequent testing of the display case's airtightness, and can still regulate the humidity of the museum display case even when there are certain defects in its airtightness. Summary of the Invention

[0006] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that the cost of humidity control using existing large-scale constant humidity equipment is too high, and the requirements for the sealing of the display case are high during use. For some old display cases, additional sealing modifications are required, which is also costly.

[0007] To address the aforementioned problems, this invention provides a positive pressure humidity control device for a museum display case, comprising a barometer installed inside the display case and a humidifier installed at the bottom of the display case. The barometer is connected to the humidifier via a signal connection. The humidifier includes a lower U-shaped outer shell and an upper U-shaped outer shell fixedly connected to the upper ends of the left and right edges of the lower U-shaped outer shell. Multiple evenly distributed exhaust holes are drilled at the rear end of the lower U-shaped outer shell and at both ends of the upper U-shaped outer shell. A control panel, an antenna, and a water inlet are fixedly installed at the front end of the lower U-shaped outer shell. A bottom water tank is fixedly connected to the upper end of the side of the lower U-shaped outer shell closest to the front. The water inlet communicates with the bottom water tank. Multiple liquid level sensors are installed on the upper end of the bottom water tank. The sensor is located between the electrolyte membrane system and the power module. The bottom water tank is fixedly connected to the filter, two variable frequency fans, semiconductor cooling unit, evaporative humidification unit, electrolyte membrane system and power module in sequence. The two variable frequency fans are arranged side by side, and the filter, variable frequency fans, semiconductor cooling unit, evaporative humidification unit and electrolyte membrane system are connected in sequence. The bottom end of the semiconductor cooling unit is connected to the bottom water tank. The upper end of the semiconductor cooling unit is fixedly connected to a hollow heat absorption plate. The rear end of the lower U-shaped shell is fixedly connected to an air outlet and a temperature and humidity sensor. An exhaust pipe is fixedly connected between the electrolyte membrane system and the air outlet. The probe of the temperature and humidity sensor extends into the display case. A drainage unit is fixedly installed at the upper end of the lower U-shaped outer shell. The evaporative humidification unit contains a humidification unit. Both the humidification unit and the drainage unit include multiple vertically placed cotton swabs, which are set up separately.

[0008] In the aforementioned positive pressure humidity control equipment for the microenvironment of museum display cases, the coordinated operation of the positive pressure dual-mode semiconductor-electrolyte membrane composite dehumidification and intelligent humidification system effectively maintains the humidity control accuracy inside the display case, achieving efficient and stable control of the display case environment. Furthermore, the use of this humidity control equipment has lower requirements for the sealing of the display case, making it particularly suitable for old display cases that have not undergone sealing modifications, thereby effectively reducing the cost of regularly maintaining the sealing of the display case.

[0009] As a further improvement of this application, a circulating water tank is also fixedly connected to the upper end of the bottom water tank. The circulating water tank and the filter are arranged side by side. Liquid guide pipes are fixedly connected between the hollow heat absorption plate and the circulating water tank, between the hollow heat absorption plate and the drainage unit, and between the circulating water tank and the drainage unit. A water pump is installed on the liquid guide pipe located between the circulating water tank and the drainage unit.

[0010] As a further improvement of this application, the drainage unit includes a water collection tray fixedly connected to the upper end of the lower U-shaped outer shell, a cotton swab holder placed on the water collection tray, a heat-conducting copper busbar arranged parallel to the cotton swab holder, and two exhaust fans arranged parallel to the heat-conducting copper busbar. An overflow pipe is also fixedly connected between the water collection tray and the bottom water tank, and the overflow pipe connects the water collection tray and the bottom water tank. The exhaust ends of the two exhaust fans face the heat-conducting copper busbar. Multiple sets of vertically corresponding insertion holes are drilled on the cotton swab holder, and multiple cotton swabs are respectively inserted into the multiple sets of insertion holes and fixedly penetrate the water collection tray and extend into the inner water collection tray.

[0011] As a further improvement of this application, the humidification unit also includes a cotton swab holder with multiple sets of sockets, and the cotton swabs on the multiple humidification units move through the lower end of the evaporative humidification unit, the upper end of the bottom water tank and extend into the interior of the bottom water tank.

[0012] As a further improvement of this application, the overflow pipe is a horizontal L-shape, and the vertical end of the overflow pipe is connected to the outer end of the bottom water tank near the top.

[0013] As a further improvement of this application, the cotton swab includes a central tampon, multiple interlayer tampons wrapped around the central tampon, multiple outer tampons wrapped around the outer ends of the multiple interlayer tampons, and multiple cotton loops that are collectively wrapped around the multiple outer tampons. The multiple interlayer tampons are staggered with the multiple outer tampons, and the multiple cotton loops correspond to and are fixed with the multiple insertion holes in the same group.

[0014] As a further improvement of this application, two electromagnetic rings are fixedly embedded in the inner wall of the socket, and magnetic core blocks are fixedly embedded in both the outer cotton strip and the inner cotton strip. Multiple magnetic core blocks in multiple outer cotton strips have the same height and correspond to one of the electromagnetic rings. Multiple magnetic core blocks in multiple inner cotton strips have the same height and correspond to the other electromagnetic ring. When energized, the electromagnetic rings generate a magnetic attraction force on the magnetic core blocks.

[0015] As a further improvement of this application, the cotton loop is an elastic annular bladder structure, and the cotton loop is saturated with air. When the electromagnetic ring is not energized, multiple outer cotton strips and multiple inner cotton strips form a complete annular structure.

[0016] In summary, the synergistic operation of the positive pressure dual-mode semiconductor-electrolyte membrane composite dehumidification and intelligent humidification system effectively maintains the humidity control precision within the display case, achieving efficient and stable environmental control. Furthermore, this humidity control device has lower requirements for the display case's sealing, making it particularly suitable for older display cases that have not undergone sealing modifications, thus effectively reducing the cost of regularly maintaining the display case's seal. Additionally, the multiple separate cotton swabs allow the device to be adjusted to unfold in layers after a period of use, increasing the water absorption area and enabling the swabs to absorb water from the inner layer, effectively mitigating the reduced water delivery caused by scale buildup. Compared to existing technologies, this effectively extends the interval between cotton swab replacements and improves swab utilization. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the main aspects of the first embodiment of this application; Figure 2 This is a perspective view of the constant humidity machine according to the first embodiment of this application; Figure 3 This is an internal perspective view of the humidity control unit according to the first embodiment of this application from a frontal view angle. Figure 4 This is an internal perspective view of the humidity control unit according to the first embodiment of this application from a rear-view angle. Figure 5 This is a top view of the humidity control unit according to the first embodiment of this application; Figure 6 This is a perspective view of the humidity control machine according to the first embodiment of this application after removing the upper and lower U-shaped outer shells; Figure 7 This is a perspective view of the cotton swab holder according to the first embodiment of this application; Figure 8 This is a top view of the cotton swab holder according to the second embodiment of this application; Figure 9 An exploded view of the split-type cotton swab according to the second embodiment of this application; Figure 10 This is a top view of the split-type cotton swab according to the second embodiment of this application; Figure 11 This is a three-dimensional schematic diagram of the end portion of the split cotton swab according to the second embodiment of this application; Figure 12 This is a top view of the second embodiment of the split cotton swab after layering and expansion. Figure 13 This is a three-dimensional schematic diagram of the rear end portion of the split-type cotton swab in the second embodiment of this application.

[0018] Explanation of the labels in the diagram: 11 Lower U-shaped shell, 12 Upper U-shaped shell, 101 Control panel, 102 Antenna, 103 Water inlet, 104 Exhaust vent, 105 Air outlet, 106 Temperature and humidity sensor, 2 Power module, 31 Circulating water tank, 32 Liquid guide pipe, 33 Water pump, 41 Semiconductor cooling unit, 42 Hollow heat absorption plate, 501 Bottom water tank, 502 Overflow pipe, 51 Filter, 52 Variable frequency fan, 53 Evaporative humidification unit, 54 Electrolyte membrane system, 55 Exhaust pipe, 61 Exhaust fan, 62 Thermal copper busbar, 63 Cotton swab, 64 Water collection tray, 601 Cotton swab holder, 602 Electromagnetic ring, 603 Magnetic core block, 604 Socket, 631 Center cotton swab, 632 Interlayer cotton swab, 633 Outer cotton swab, 634 Cotton loop. Detailed Implementation

[0019] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0020] First implementation method: Figure 1-2 The illustration shows a positive pressure humidity control device for a museum display case, comprising a barometer installed inside the display case and a humidifier installed at the bottom of the display case. The barometer is connected to the humidifier via a signal connection, allowing real-time monitoring of the air pressure inside the display case. During humidity control, a variable frequency fan 52 inside the humidifier continuously delivers purified, humidified air to the display case, creating a dynamic positive pressure difference of 0.8-1.2 Pa. This effectively blocks external environmental disturbances. Simultaneously, the positive pressure difference effectively reduces the requirements for the display case's sealing, allowing older display cases to be fitted with this device without requiring sealing modifications, thus effectively reducing the cost of maintaining the sealing of older display cases.

[0021] like Figure 3-5The constant humidity unit includes a lower U-shaped outer shell 11 and an upper U-shaped outer shell 12 fixedly connected to the upper ends of the left and right edges of the lower U-shaped outer shell 11. Multiple evenly distributed exhaust holes 104 are drilled at the rear end of the lower U-shaped outer shell 11 and at both ends of the upper U-shaped outer shell 12. A control panel 101, an antenna 102, and a water inlet 103 are fixedly installed at the front end of the lower U-shaped outer shell 11. A bottom water tank 501 is fixedly connected to the upper end of the side of the lower U-shaped outer shell 11 closest to the front. The water inlet 103 communicates with the bottom water tank 501. Multiple liquid level sensors are installed on the upper end of the bottom water tank 501, located between the electrolyte membrane system 54 and the power module 2. Three liquid level sensors are selected, one of which is used for lower water level monitoring to provide a water shortage reminder and facilitate timely replenishment of water in the bottom water tank 501. The other two are for upper water level monitoring, with one as a spare. If one fails, it will not easily affect the detection of the liquid level. When the upper water level sensor is triggered, it indicates that the water level is full and can remind the user to stop adding water. At the same time, in dehumidification mode, the liquid condensed from the moisture in the air due to the cooling of the semiconductor cooling unit 41 also flows into the bottom water tank 501. When the liquid level rises and triggers the upper liquid level sensor, the control panel 101 can control the dehumidification module to perform automatic dehumidification without pipes.

[0022] Water can be replenished to the bottom water tank 501 through the water inlet 103, ensuring that there is always enough water to support normal humidification operation. The bottom water tank 501 is sequentially and fixedly connected to the upper part of a filter 51, two variable frequency fans 52, a semiconductor cooling unit 41, an evaporative humidification unit 53, an electrolyte membrane system 54, and a power module 2. The two variable frequency fans 52 are arranged side-by-side, and the filter 51, variable frequency fans 52, semiconductor cooling unit 41, evaporative humidification unit 53, and electrolyte membrane system 54 are sequentially connected. The lower end of the semiconductor cooling unit 41 is connected to the bottom water tank 501, and a hollow heat absorption plate 42 is fixedly connected to the upper end of the semiconductor cooling unit 41. The rear end of the lower U-shaped outer shell 11... An air outlet 105 and a temperature and humidity sensor 106 are fixedly connected. An exhaust pipe 55 is fixedly connected between the electrolyte membrane system 54 and the opening of the air outlet 105. A drainage unit is fixedly installed at the upper rear end of the lower U-shaped shell 11. A humidification unit is set inside the evaporative humidification unit 53. Both the humidification unit and the drainage unit include multiple vertically placed cotton swabs 63. The temperature and humidity sensor 106 can monitor the current humidity of the environment, so that the device can switch to humidification or dehumidification of the air in real time according to the humidity, thereby inputting constant humidity air into the display case to maintain a stable humidity environment inside the display case, reduce the range of humidity fluctuation, and thus prevent the cultural relics inside from being damaged by humidity fluctuations. When the temperature and humidity sensor 106 detects that the current ambient humidity is lower than the target value set by this humidifier, the humidification mode needs to be turned on. First, the inverter fan 52 works, drawing outside air into the filter 51 through the exhaust port 104. After being filtered by the filter 51, the air passes through the semiconductor cooling unit 41 and enters the evaporative humidification unit 53. The evaporative humidification unit 53 starts working, gradually increasing its internal temperature and causing the water absorbed in the inner cotton swab 63 to gradually vaporize and produce water vapor. The evaporative humidification unit 53 adjusts the speed of the inverter fan 52 according to the target humidity value and the humidity value of the current display case environment detected by the temperature and humidity sensor 106, thereby blowing the water vapor in the cotton swab 63 into the electrolyte membrane system 54. Then, it enters the display case through the exhaust pipe 55, completing the humidification of the air and making the air input into the display case constant in humidity.

[0023] It is worth noting that in humidification mode, the semiconductor cooling unit 41 and the electrolyte membrane system 54 only serve as channels for water vapor circulation, and neither of them works.

[0024] When the temperature and humidity sensor 106 detects that the current ambient humidity is higher than the target value set by this constant humidity machine, the dehumidification mode needs to be turned on. For example, if the current ambient humidity is 80%RH and the target is 50%RH, then the air needs to be dehumidified to maintain the humidity of the air input into the display case at 50%RH.

[0025] At this time, the variable frequency fan 52 draws outside air into the filter 51 through the exhaust port 104. After being filtered by the filter 51, the air enters the semiconductor cooling unit 41. The semiconductor cooling system then operates, controlling the power and operating time of the semiconductor to condense the moisture carried by the air in the duct, thereby gradually drying the air and bringing it close to the target humidity value. The condensed liquid water flows into the bottom water tank 501. Then, the dried air passes through the evaporative humidification unit 53 and enters the electrolyte membrane system 54. The electrolyte membrane in the electrolyte membrane system 54 separates the water molecules in the dried air into hydrogen ions and oxygen at the anode. The hydrogen ions pass through the electrolyte membrane to the cathode side, where they react with the oxygen in the air to produce water molecules, which are discharged into the bottom water tank, thus further achieving a fine dehumidification effect. Finally, the air dehumidified to the target humidity value is discharged from the electrolyte membrane system 54 into the exhaust pipe 55 and enters the interior of the display case through the air outlet 105, achieving the effect of dehumidifying the input air and keeping the air input into the display case at a constant humidity.

[0026] It is worth noting that in dehumidification mode, the evaporative humidification system does not work; it only provides a passage for the air after it has been initially dried.

[0027] like Figure 6A circulating water tank 31 is fixedly connected to the upper end of the bottom water tank 501. The circulating water tank 31 and the filter 51 are arranged side by side. Liquid guide pipes 32 are fixedly connected between the hollow heat absorption plate 42 and the circulating water tank 31, between the hollow heat absorption plate 42 and the drainage unit, and between the circulating water tank 31 and the drainage unit. A water pump 33 is installed on the liquid guide pipe 32 located between the circulating water tank 31 and the drainage unit. The drainage unit includes a water collection tray 64 fixedly connected to the upper end of the lower U-shaped outer shell 11, a cotton swab holder 601 placed on the water collection tray 64, a heat-conducting copper busbar 62 arranged parallel to the cotton swab holder 601, and two exhaust fans 62 arranged parallel to the heat-conducting copper busbar 62. 1. An overflow pipe 502 is fixedly connected between the water collection tray 64 and the bottom water tank 501. The overflow pipe 502 connects the water collection tray 64 and the bottom water tank 501. The overflow pipe 502 is a flat L-shape, and the vertical end of the overflow pipe 502 is connected to the outer end of the bottom water tank 501 near the top. The overflow pipe 502 can transport excess water in the bottom water tank 501 to the water collection tray 64. The exhaust ends of the two exhaust fans 61 face the heat-conducting copper busbar 62. Multiple sets of vertically corresponding insertion holes 604 are drilled on the cotton swab holder 601. Multiple cotton swabs 63 are respectively inserted into the multiple sets of insertion holes 604 and fixedly penetrate the water collection tray 64, extending into the water collection tray 64.

[0028] like Figure 7 The humidification unit also includes a cotton swab holder 601 with multiple sets of sockets 604. The cotton swabs 63 on the multiple humidification units move through the lower end of the evaporative humidification unit 53, the upper end of the bottom water tank 501 and extend into the interior of the bottom water tank 501.

[0029] In summer, the high humidity in the air causes a significant amount of condensate to enter the bottom water tank 501. When the level sensor detects a rise in the water level in the bottom tank 501, and some water overflows through the overflow pipe 502 into the collection tray 64, drainage is required. At this time, the lower U-shaped housing 11 controls the water pump 33 to start, pumping the coolant from the circulating water tank 31 into the hollow heat-absorbing plate 42. There, the coolant is heated by the heat dissipation end of the semiconductor cooling unit 41 and then transferred through the liquid guide pipe 32 to the heat-conducting copper busbar 62, causing it to heat up. Simultaneously, multiple cotton swabs 63 in the drainage unit absorb the overflow into the collection tray 64. When the water is removed, the two exhaust fans 61 work, and the air they blow out is heated by the heat-conducting copper busbar 62. The hot air then acts directly on the cotton swab 63, which turns the water absorbed in the cotton swab 63 into water vapor and blows it out. The vapor then enters the air through the exhaust port 104, realizing an automatic waterless drainage function. This makes it less likely that the condensate generated during dehumidification will affect the stability of the liquid level in the bottom water tank 501, thereby maintaining the stability of humidity control in the display case. At the same time, due to the positive pressure state inside the display case, even if the old display case has poor sealing, the increased humidity caused by the cotton swab 63 draining water into the air will hardly affect the ambient humidity inside the display case.

[0030] In summary, the synergistic operation of the positive pressure dual-mode semiconductor-electrolyte membrane composite dehumidification and intelligent humidification system effectively maintains the humidity control precision inside the display case, achieving efficient and stable control of the display case environment. Furthermore, the use of this humidity control equipment has lower requirements for the sealing of the display case, making it particularly suitable for older display cases that have not undergone sealing modifications, thereby effectively reducing the cost of regularly maintaining the sealing of the display case.

[0031] Second implementation method: This embodiment further improves the cotton swab based on the first embodiment, while the rest remains the same as the first embodiment.

[0032] Figure 8-9 As shown, the cotton swab 63 is a split design, comprising a central cotton strip 631, multiple interlayer cotton strips 632 wrapped around the central cotton strip 631, multiple outer cotton strips 633 wrapped around the outer ends of the multiple interlayer cotton strips 632, and multiple cotton loops 634 that are collectively fitted around the multiple outer cotton strips 633. The multiple interlayer cotton strips 632 are staggered with the multiple outer cotton strips 633, and the multiple cotton loops 634 correspond to and are fixed with the multiple insertion holes 604 in the same group. The cotton loops 634 are mainly used to separate the inner wall of the insertion hole 604 from the cotton swab 63, so that the cotton swab 63 has a certain space for subsequent layered expansion.

[0033] like Figure 10-11 The inner wall of the socket 604 is fixedly inlaid with two electromagnetic rings 602 distributed vertically. The outer cotton strip 633 and the interlayer cotton strip 632 are both fixedly inlaid with magnetic core blocks 603. The multiple magnetic core blocks 603 in the multiple outer cotton strips 633 are of the same height and correspond to one of the electromagnetic rings 602. The multiple magnetic core blocks 603 in the multiple interlayer cotton strips 632 are of the same height and correspond to the other electromagnetic ring 602. When energized, the electromagnetic rings 602 generate magnetic attraction force on the magnetic core blocks 603. The cotton loop 634 is an elastic annular bladder structure and is saturated with air.

[0034] It is worth noting that multiple magnetic core blocks 603 are connected to the central cotton strip 631 by elastic threads, and the elastic threads are in a straight state, so that the cotton strip 63 is not easy to fall apart when it is not subject to external magnetic attraction, and can maintain the overall state.

[0035] When the electromagnetic ring 602 is not energized, the multiple outer cotton strips 633 and the multiple inner cotton strips 632 form a complete ring structure. At this time, the cotton stick 63 is in a closed whole state. When it absorbs water, the outer cotton strips 633 absorb water first and then gradually transfer it to the inner cotton strips 632 and the central cotton strip 631. Its use is basically the same as in the first implementation method. However, after a period of use, due to the influence of water quality, scale forms on the cotton stick 63, and its water absorption becomes poor. Figure 12-13Multiple electromagnetic rings 602 corresponding to the magnetic core blocks 603 inside the outer cotton strips 633 can be energized, thereby causing the multiple outer cotton strips 633 to be attracted and separated from the inner interlayer cotton strips 632. At this time, the outer wall of the interlayer cotton strips 632 is exposed, and a gap is created between the two outer cotton strips 633. Water can cross this gap and directly enter the interlayer cotton strips 632, so that both the outer wall of the interlayer cotton strips 632 and the inner wall of the outer cotton strips 633 can absorb water, increasing the water absorption area. In this design, the outer cotton strips 633 located on the outside accumulate more water. After the dirt is removed, the absorbent inner cotton strip 632 can directly absorb water, thus effectively compensating for the damaged absorbency of the cotton swab 63. After a period of time, another electromagnetic ring 602 can be energized again to separate the multiple inner cotton strips 632 from the central cotton strip 631, thereby improving the damaged absorbency again. Compared with the integral cotton swab 63 in the first embodiment, this method can effectively extend the overall effective service life of the cotton swab 63, reduce the replacement frequency, improve the utilization rate of the cotton swab 63, and also achieve a certain effect of reducing the cost of use.

[0036] It is worth noting that, for the split-type cotton swab 63, the electromagnetic ring 602 is embedded in the inner wall of the insertion hole 604, so it can be reused, and the cotton binding ring 634 is only sleeved on the outside of the cotton swab 63, so it can also be reused, thereby reducing the cost of the split-type cotton swab.

[0037] By using multiple separate cotton swabs, this device can adjust the cotton swabs to unfold in layers after a period of use. This increases the water absorption area of ​​the cotton swabs and allows them to absorb water from the inner layer, effectively alleviating the problem of reduced water delivery caused by scale buildup. Compared with existing technologies, this can effectively extend the interval between cotton swab replacements and improve the utilization rate of the cotton swabs.

[0038] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A positive pressure humidity control device for a museum display case, characterized in that: The system includes a barometer installed inside the display case and a humidifier installed at the bottom of the display case. The barometer is connected to the humidifier via a signal. The humidifier includes a lower U-shaped housing (11) and an upper U-shaped housing (12) installed on the upper left and right edges of the lower U-shaped housing (11). A bottom water tank (501) is installed on the upper side of the lower U-shaped housing (11) near the front. A filter (51), two variable frequency fans (52) arranged side by side, a semiconductor refrigeration unit (41), and an evaporative humidifier are sequentially installed on the upper part of the bottom water tank (501). The unit (53), electrolyte membrane system (54) and power module (2) are provided, and the lower end of the semiconductor cooling unit (41) is connected to the bottom water tank (501). The upper end of the semiconductor cooling unit (41) is fixedly connected to a hollow heat absorption plate (42). The rear end of the lower U-shaped shell (11) is provided with an air outlet (105) and a temperature and humidity sensor (106). An exhaust pipe (55) is connected between the electrolyte membrane system (54) and the opening of the air outlet (105). The probe of the temperature and humidity sensor (106) extends into the display case. A drainage unit is installed at the upper rear end of the lower U-shaped outer shell (11). A humidification unit is provided inside the evaporative humidification unit (53). Both the humidification unit and the drainage unit include multiple vertically placed cotton swabs (63). Each cotton swab (63) includes a central cotton strip (631), multiple interlayer cotton strips (632) wrapped around the central cotton strip (631), multiple outer cotton strips (633) wrapped around the outer ends of the multiple interlayer cotton strips (632), and multiple cotton loops (634) that are collectively sleeved around the multiple outer cotton strips (633). The multiple interlayer cotton strips (632) are respectively staggered with the multiple outer cotton strips (633), and the multiple cotton loops (634) correspond to and are fixed with the multiple insertion holes (604) in the same group. The inner wall of the insertion hole (604) is fixedly inlaid with two electromagnetic rings (602) distributed vertically. Magnetic core blocks (603) are fixedly inlaid in the outer cotton strip (633) and the interlayer cotton strip (632). The multiple magnetic core blocks (603) in the multiple outer cotton strips (633) are of the same height and correspond to one of the electromagnetic rings (602). The multiple magnetic core blocks (603) in the multiple interlayer cotton strips (632) are of the same height and correspond to the other electromagnetic ring (602). When energized, the electromagnetic ring (602) generates a magnetic attraction force on the magnetic core block (603). The cotton loop (634) is an elastic annular bladder structure and is saturated with air. When the electromagnetic ring (602) is not energized, the multiple outer cotton strips (633) and the multiple interlayer cotton strips (632) form a complete annular structure.

2. The positive pressure humidity control device for a museum display case according to claim 1, characterized in that: Multiple evenly distributed vent holes (104) are drilled at the rear end of the lower U-shaped shell (11) and at the left and right ends of the upper U-shaped shell (12). A control panel (101), an antenna (102), and a water inlet (103) are fixedly installed at the front end of the lower U-shaped shell (11). The water inlet (103) is connected to the bottom water tank (501).

3. The positive pressure humidity control device for a museum display case according to claim 1, characterized in that: Multiple liquid level sensors are installed on the upper end of the bottom water tank (501). The multiple liquid level sensors are located between the electrolyte membrane system (54) and the power module (2). A circulating water tank (31) is also fixedly connected to the upper end of the bottom water tank (501). The circulating water tank (31) and the filter (51) are arranged side by side. Liquid guide pipes (32) are fixedly connected between the hollow heat absorption plate (42) and the circulating water tank (31), between the hollow heat absorption plate (42) and the drainage unit, and between the circulating water tank (31) and the drainage unit. A water pump (33) is installed on the liquid guide pipe (32) located between the circulating water tank (31) and the drainage unit.

4. The positive pressure humidity control device for a museum display case according to claim 3, characterized in that: The drainage unit includes a water collection tray fixedly connected to the upper end of the lower U-shaped outer shell (11), a cotton swab holder (601) placed on the water collection tray, a heat-conducting copper busbar (62) arranged parallel to the cotton swab holder (601), and two exhaust fans (61) arranged parallel to the heat-conducting copper busbar (62). An overflow pipe (502) is also fixedly connected between the water collection tray and the bottom water tank (501), and the overflow pipe (502) connects the water collection tray and the bottom water tank (501). The exhaust ends of the two exhaust fans (61) face the heat-conducting copper busbar (62). Multiple sets of vertically corresponding insertion holes (604) are drilled on the cotton swab holder (601). Multiple cotton swabs (63) are respectively inserted into the multiple sets of insertion holes (604) and fixedly penetrate the water collection tray to extend into the water collection tray.

5. The positive pressure humidity control device for a museum display case according to claim 4, characterized in that: The humidification unit also includes a cotton swab holder (601) with multiple sets of sockets (604), and the cotton swabs (63) on the multiple humidification units move through the lower end of the evaporative humidification unit (53), the upper end of the bottom water tank (501) and extend into the interior of the bottom water tank (501).

6. The positive pressure humidity control device for a museum display case according to claim 5, characterized in that: The overflow pipe (502) is a flat L-shape, and the vertical end of the overflow pipe (502) is connected to the outer end of the bottom water tank (501) near the top.

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