Heating and humidifying device for tobacco leaves

Abstract

The utility model discloses a heating and humidifying device for tobacco leaves, which comprises an air cabinet, a heating device and a humidifying device, wherein the air cabinet is provided with a fresh air port and an air outlet; the wet film humidifier is arranged in the air cabinet; the first heating assembly is arranged in the air cabinet; the second heating assembly is arranged in the air cabinet, and the first heating assembly and the second heating assembly are located on the two sides of the wet film humidifier; air passing through the fresh air opening sequentially passes through the first heating assembly, the wet film humidifier and the second heating assembly and then is exhausted through the air outlet. According to the temperature and humidity requirements of tobacco leaves, even if the heating air temperature of the first heating assembly, the passing humidity of the wet film humidifier and the heating air temperature of the second heating assembly are adjusted, accurate control over the temperature and humidity of hot air is achieved, and the heating and humidifying accuracy of the tobacco leaves is improved; by means of heating and humidifying hot wind energy generated by the tobacco leaf heating and humidifying device, instant loss of chemical components in tobacco leaves is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of tobacco leaf heating and humidification technology, and in particular to a heating and humidification device for tobacco leaves. Background Technology

[0002] Because the cycle from raw tobacco entering the warehouse to finished product leaving the warehouse is relatively long, the tobacco leaves lose a lot of moisture before and after sorting during this process. As a result, the breakage rate of tobacco leaves is relatively high during sorting and leaf laying. In order to reduce the breakage rate of tobacco leaves and increase the yield of finished tobacco sheets, the tobacco leaves need to be heated and humidified before sorting or threshing and re-drying.

[0003] The temperature difference between the tobacco leaves and the hot air is the potential difference for sensible heat transfer, while the difference between the partial pressure of water vapor in the hot air and the partial pressure of water vapor on the surface of the tobacco leaves is the potential difference for water vapor transfer from the flue gas to the solution. During the process of tobacco leaves absorbing moisture from the water vapor, on the one hand, water vapor in the water vapor transfers mass to the tobacco leaves; on the other hand, sensible heat in the hot air transfers heat to the tobacco leaves. An increase in the temperature of the tobacco leaves will change the partial pressure of water vapor on the surface of the tobacco leaves, thus affecting the rate of water vapor absorption. Therefore, the effects of the heat transfer potential difference and the mass transfer potential difference on the process of tobacco leaves absorbing moisture from the water vapor are mutually influential and coupled. Existing conventional heating and humidification equipment has difficulty accurately controlling the temperature and humidity of the hot air, and its heating and humidification efficiency is low. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, the present invention provides a heating and humidifying device for tobacco leaves, wherein the heating and humidifying device can adjust the heating air temperature of the first heating component, the humidity of the wet film humidifier, and the heating air temperature of the second heating component according to the temperature and humidity requirements of the tobacco leaves, so as to achieve accurate control of the temperature and humidity of the hot air, improve the accuracy of heating and humidifying the tobacco leaves, and the heating and humidifying hot air generated by the present tobacco leaf heating and humidifying device can effectively avoid the instantaneous loss of the internal chemical components of the tobacco leaves.

[0006] Specifically, the following technical solutions are included:

[0007] This utility model provides a heating and humidifying device for tobacco leaves, the heating and humidifying device comprising:

[0008] A blower unit, which is equipped with a fresh air inlet and an air outlet;

[0009] A wet film humidifier is installed inside the air handling unit;

[0010] The first heating component is disposed inside the blower unit;

[0011] The second heating component is disposed inside the air handling unit, and the first heating component and the second heating component are located on both sides of the wet film humidifier;

[0012] The air entering through the fresh air inlet passes sequentially through the first heating component, the wet film humidifier, and the second heating component before being discharged through the air outlet.

[0013] Optionally, the first heating assembly includes a first heat exchange heater and a first auxiliary electric heater arranged in parallel, wherein the first auxiliary electric heater is located between the first heat exchange heater and the wet film humidifier;

[0014] The first heating component further includes a first water tray, which is disposed below the first heat exchange heater and the first auxiliary electric heater, and is located inside the air handling unit.

[0015] Optionally, the second heating assembly includes a second heat exchange heater and a second auxiliary electric heater arranged in parallel, with the second heat exchange heater located between the second auxiliary electric heater and the wet film humidifier;

[0016] The second heating component also includes a second water pan, which is disposed below the second heat exchange heater and the second auxiliary electric heater, and is located inside the blower cabinet.

[0017] Optionally, the wet film humidifier includes a wet film body and a water spraying device, the water spraying device being located above the wet film body and providing water to the wet film body.

[0018] Optionally, the water spraying device includes:

[0019] A water spray pipe is located above the wet film body, and multiple water spray outlets are arranged side by side on the outer periphery of the water spray pipe;

[0020] A water supply component is connected to the water spray pipe, and the water supply component provides the water source to the water spray pipe.

[0021] Optionally, the water spray pipe is rotatably connected to the air handling unit, and the water spray outlet can face towards or away from the wet film body.

[0022] Optionally, the water supply components include:

[0023] A water receiving tray is provided inside the air handling unit, and the water receiving tray is located below the wet membrane body;

[0024] A circulating water pump, wherein the inlet of the circulating water pump is connected to the water receiving tray, and the outlet of the circulating water pump is connected to the water spray pipe.

[0025] Optionally, the heating and humidifying device further includes an air filter assembly, which is disposed inside the air handling unit and located between the fresh air inlet and the first heating assembly.

[0026] Optionally, the air filtration assembly includes a pre-filter and a medium-efficiency bag filter, the medium-efficiency bag filter being located between the pre-filter and the first heating assembly.

[0027] Optionally, the heating and humidifying device further includes a fan assembly disposed inside the air handling unit, and the fan assembly is located on the side of the second heater away from the wet film humidifier;

[0028] The air handling unit is provided with an air outlet and an air return outlet. The air outlet is located above the fan assembly, and the air return outlet is located near the fresh air inlet.

[0029] This utility model provides a heating and humidifying device for tobacco leaves. The device includes a fan cabinet, and a first heating component, a wet film humidifier, and a second heating component sequentially arranged within the fan cabinet. The fan cabinet has a fresh air inlet and an air outlet. Initial air enters the fan cabinet through the fresh air inlet and is first heated by the first heating component to form high-temperature hot air. Then, the high-temperature hot air passes through the wet film humidifier, where the moisture on the humidifier vaporizes, forming water vapor that mixes with the high-temperature hot air, achieving rapid humidification and forming humid air. Finally, the humid air passes through the second heating component, further heating it to form heated and humidified hot air, which is then discharged through the air outlet into the room where tobacco leaves are stored to heat and humidify the tobacco leaves. This improves the accuracy of heating and humidifying tobacco leaves, and the heated and humidified hot air generated by the device effectively avoids the instantaneous loss of the internal chemical components of the tobacco leaves.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a heating and humidifying device according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of a wet film humidifier according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the normal working position of the water spray pipe according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the water spray pipe protection position according to an embodiment of the present invention.

[0036] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0037] 100 air handling unit, 110 fresh air inlet, 120 air outlet, 130 inspection door, 140 return air inlet;

[0038] 200 Wet film humidifier, 210 Wet film body, 220 Spray pipe, 221 Spray outlet, 230 Water collection tray;

[0039] 300 First heating component, 310 First heat exchanger, 320 First auxiliary electric heater, 330 First water pan;

[0040] 400 Second heating component, 410 Second heat exchanger, 420 Second auxiliary electric heater, 430 Second water pan;

[0041] 500 air filter assembly, 510 pre-filter, 520 medium-efficiency bag filter;

[0042] 600 wind turbine assembly. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0044] Before providing a further detailed description of the embodiments of this utility model, the directional terms used in the embodiments of this utility model, such as "upper part", "lower part" and "side part", do not have the meaning of limiting the scope of protection of this utility model.

[0045] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0046] Figure 1This is a schematic diagram of a heating and humidifying device according to an embodiment of the present invention.

[0047] like Figure 1 As shown, one embodiment of this utility model provides a heating and humidifying device for tobacco leaves, the heating and humidifying device comprising:

[0048] The air handling unit 100 is equipped with a fresh air inlet 110 and an air outlet 120.

[0049] The wet film humidifier 200 is installed inside the air handling unit 100;

[0050] The first heating component 300 is installed inside the blower unit 100;

[0051] The second heating component 400 is disposed inside the air handling unit 100, and the first heating component 300 and the second heating component 400 are located on both sides of the wet film humidifier 200;

[0052] The air entering through the fresh air inlet 110 passes sequentially through the first heating component 300, the wet film humidifier 200, and the second heating component 400 before being discharged through the air outlet 120.

[0053] It should be noted that the heating and humidifying device includes a fan cabinet 100, and a first heating component 300, a wet film humidifier 200, and a second heating component 400 sequentially arranged inside the fan cabinet 100. The fan cabinet 100 is provided with a fresh air inlet 110 and an air outlet 120. Initial air enters the fan cabinet 100 through the fresh air inlet 110. First, the initial air is heated by the first heating component 300 to form high-temperature hot air. Then, the high-temperature hot air passes through the wet film humidifier 200, where the high-temperature hot air causes the moisture on the wet film humidifier to vaporize, forming water vapor which mixes with the high-temperature hot air, achieving rapid humidification of the high-temperature hot air to form humid air. Finally, the humid air passes through the second heating component 300, which heats the humid air again to form heated and humidified hot air, which is then discharged into the room where tobacco leaves are stored through the air outlet 120 to heat and humidify the tobacco leaves. The heating and humidifying device of this application can improve the accuracy of heating and humidifying tobacco leaves. The heating and humidifying hot air generated by the device can effectively avoid the instantaneous loss of the internal chemical components of tobacco leaves.

[0054] Specifically, tobacco leaves are typically stored in a room and kept at a constant temperature to ensure their reliability for subsequent use. The heating and humidifying device for tobacco leaves described in this application can achieve stable humidity and temperature in the tobacco storage room. The heating and humidifying device includes a blower unit 100, a first heating element 300, a wet film humidifier 200, and a second heating element 400. The blower unit 100 has a bellows structure with a straight-through air duct inside. A fresh air inlet 110 and an air outlet 120 are located at opposite ends of the blower unit 100. A return air inlet 140 is also located at one end of the fresh air inlet 110, connecting to the tobacco storage room. The air outlet 120 also connects to the tobacco storage room and is used to exhaust the heated and humidified air. The initial air entering the tobacco storage room through the air handling unit 100 passes sequentially through the first heating element 300, the wet film humidifier 200, and the second heating element 400, forming heated and humidified hot air before entering the tobacco storage room. This achieves heating and humidification of the tobacco storage room, ensuring the reliability and stability of the tobacco storage environment. After the heating and humidification process is completed, to slowly reduce the temperature and humidity in the tobacco storage room for subsequent operations, the fresh air inlet 110 can be opened to allow fresh air to enter, creating a positive pressure state in the tobacco storage room. At least one inspection door 130 can also be installed on the air handling unit 100 to facilitate the inspection and replacement of components in the first heating element 300, the wet film humidifier 200, and the second heating element 400. In this application, the first heating component 300, the wet film humidifier 200, and the second heating component 400 are all detachably installed inside the air handling unit 100, and the first heating component 300, the wet film humidifier 200, and the second heating component 400 are arranged at intervals. That is, the first heating component 300 is located on the upstream side of the wet film humidifier 200, and the second heating component 400 is located on the downstream side of the wet film humidifier 200.

[0055] Understandably, the set temperature range in the tobacco storage room is 29℃ to 35℃, and the set humidity range is 75%RH to 90%RH, depending on the grade of tobacco leaves being processed. The heating and humidifying device is designed based on the temperature and humidity ranges, area, storage capacity, and local weather conditions of the tobacco storage room. The processing capacity of the first heating component 300, the wet film humidifier 200, the second heating component 400, and the fan component 600 (controlled by the controller programming, not within the scope of this application) meets the application requirements. Accurate control is achieved by collecting, feeding back, and controlling the output of the first heating component 300, the wet film humidifier 200, the second heating component 400, and the fan component 600 through temperature and humidity sensors. Each energy-providing component has an adjustable capacity. The heating and humidifying feature of this application is that water can be completely integrated into the flowing air through the heating and humidifying components, more closely resembling the natural growth and storage environment of tobacco leaves, thus avoiding the instantaneous loss of chemical components in the tobacco leaves. In other words, typically two or more temperature and humidity sensors are installed in the tobacco storage room, and the average value is used as the monitored temperature and humidity value. Temperature and humidity sensors are also installed at the fresh air inlet 110, return air inlet 140, and air outlet 120 for monitoring temperature and humidity. The temperature and humidity at the air outlet 120 must be suitable for the operating conditions of the subsequent fan assembly 600. Since the initial air (air from the tobacco storage room or a mixture of air from the tobacco storage room and the outside) enters the air handling unit 100, is heated and humidified, and then re-enters the tobacco storage room, the temperature and humidity inside the tobacco storage room are constantly changing. Based on this change, the output efficiency of the first heating assembly 300, the wet film humidifier 200, the second heating assembly 400, and the fan assembly 600 is continuously adjusted to ensure that the temperature and humidity inside the tobacco storage room always meet the set requirements. The calculation of the output efficiency of the first heating assembly 300, the wet film humidifier 200, the second heating assembly 400, and the fan assembly 600 is not the focus of this application and will not be elaborated upon.

[0056] When the heating and humidifying device is running, the initial air enters the air handling unit 100 through the return air inlet 140 or the return air inlet and fresh air inlet 110 simultaneously. First, the initial air is heated by the first heating component 300 to the set air temperature (usually below 60°C) to form high-temperature hot air. Then, the high-temperature hot air passes through the wet film humidifier 200, where the water molecules on the wet film humidifier 200 are vaporized to form water vapor, which is mixed with the high-temperature hot air to achieve rapid humidification of the high-temperature hot air to form humid air. Finally, the humid air passes through the second heating component 400, where it is heated to form heated and humidified hot air, which is discharged through the air outlet 120 and sent into the tobacco storage room to heat and humidify the tobacco leaves. This application utilizes the heat from the first heating element 300 to improve the humidification efficiency of the initial air in the wet film humidifier 200, and then uses the second heating element 400 to heat the humidified air to a set temperature, thereby achieving precise control through continuous adjustment of the initial air's temperature and humidity. This control method is understood to be called "dew point control." The dew point is defined as the temperature at which air reaches saturation under constant water vapor content and pressure, expressed in °C or °F. It represents the temperature at which water vapor and water reach equilibrium. Dew point control places high demands on the adjustment response speed of the first heating element 300 and the second heating element 400, especially the performance of the wet film humidifier 200. Since the saturation efficiency of the wet film humidifier 200 is fixed, the inlet temperature of the wet film humidifier 200 needs to be adjusted by the first heating component 300 according to the required temperature, humidity and dew point in the tobacco storage room. This ensures that the dew point temperature after passing through the wet film humidifier 200 matches the required point. Then, the dry bulb temperature is adjusted by the second heating component 400 before being sent into the tobacco storage room. This improves the accuracy of heating and humidifying the tobacco leaves. The heating and humidifying hot air generated by the heating and humidifying device of this application can effectively avoid the instantaneous loss of the internal chemical components of the tobacco leaves, which would cause an irreversible reduction in important chemical components such as total sugar and reducing sugar.

[0057] In one feasible implementation, the first heating assembly 300 includes a first heat exchange heater 310 and a first auxiliary electric heater 320 arranged side by side, with the first auxiliary electric heater 320 located between the first heat exchange heater 310 and the wet film humidifier 200.

[0058] The first heating component 300 also includes a first water tray 330, which is located below the first heat exchange heater 310 and the first auxiliary electric heater 320, and is located inside the air handling unit 100.

[0059] The first heating component 300 includes a first heat exchange heater 310 and a first auxiliary electric heater 320. The first heat exchange heater 310 is located upstream of the first auxiliary electric heater 320. During installation and use, the first heat exchange heater 310 is connected to an external heat source. The first heat exchange heater 310 has a heat exchange relationship with the air in the air handling unit 100 to heat the initial air entering the air handling unit 100. The first auxiliary electric heater 320 directly heats the initial air entering the air handling unit 100.

[0060] It should be noted that, depending on the operating mode, the first heat exchange heater 310 and the first auxiliary electric heater 320 can operate independently or simultaneously. When operating simultaneously, the first heat exchange heater 310 first heats the initial air, and the first auxiliary electric heater 320 further heats it to the required humidification temperature. In other situations, such as when the external heat source fails, the first heat exchange heater 310 will not operate, and the first auxiliary electric heater 320 will operate alone to improve the reliability and operational stability of the first heating assembly 300. In this case, the power of the first auxiliary electric heater 320 needs to be increased to ensure that the heating temperature of the first heating assembly 300 meets the set air temperature given by the control system. It can be understood that the first heat exchange heater 310 heats through an external heat source; this refers to the fact that when the external heat source fails, the first auxiliary electric heater 320 can provide backup, thus confirming the reliability and operational stability of the first heating assembly 300. Typically, the first auxiliary electric heater 320 has multiple heating wires and is generally not prone to damage.

[0061] In addition, the first heat exchanger 310 and the first auxiliary electric heater 320 are detachably connected to the inner wall of the air handling unit 100 for easy replacement and maintenance. Since the first heat exchanger 310 uses hot water as a heat source to heat the initial air, to improve the safety of the first heating assembly 300 and prevent water accumulation inside the air handling unit 100, a first water tray 330 can be installed below the first heat exchanger 310. The first water tray 330 collects seepage water from the first heat exchanger 310. The water tray 330 can be connected to a pipe, and when the water level reaches a certain set value, the water in the first water tray 330 can be pumped out. It is understandable that to ensure sufficient water collection in the first water tray 330, it can be made larger, allowing it to be located below the first heat exchanger 310 and the first auxiliary electric heater 320, thus extending the pump start-up time. The first water tray 330 can be detachably connected to the bottom wall of the air handling unit 100.

[0062] In one feasible implementation, the second heating assembly 400 includes a second heat exchange heater 410 and a second auxiliary electric heater 420 arranged in parallel, with the second heat exchange heater 410 located between the second auxiliary electric heater 420 and the wet film humidifier 200.

[0063] The second heating assembly 400 also includes a second water tray 430, which is disposed below the second heat exchange heater 410 and the second auxiliary electric heater 420, and is located inside the air handling unit 100.

[0064] The second heating component 400 includes a second heat exchange heater 410 and a second auxiliary electric heater 420, with the second heat exchange heater 410 located upstream of the second auxiliary electric heater 420. Similarly, depending on the operating mode, the second heat exchange heater 410 and the second auxiliary electric heater 420 can operate independently or simultaneously. When both operate simultaneously, the second heat exchange heater 410 heats the humidified air formed after passing through the wet film humidifier 200, and then the second auxiliary electric heater 420 continues to heat the humidified air to accurately reach the set temperature given by the controller. In other operating conditions, such as when the external heat source fails, the second heat exchange heater 410 does not operate, and heating is carried out solely by the second auxiliary electric heater 420 to improve the reliability and operational stability of the second heating component 400. In this case, the power of the second auxiliary electric heater 420 needs to be increased to ensure that the heating temperature of the second heating component 400 meets the set air temperature given by the control system. It is understandable that the second heat exchange heater 410 is heated by an external heat source. This means that when the external heat source fails, the second auxiliary electric heater 420 can provide protection, thereby confirming the reliability and operational stability of the second heating component 400. Typically, the second auxiliary electric heater 420 has multiple heating wires and is usually not damaged.

[0065] Similarly, hot water is also used as a heat source in the second heat exchanger 410. Therefore, to improve the safety of the heating and humidification device and prevent water accumulation in the air handling unit 100, a second water pan 430 can be installed below the second heat exchanger 410. The second water pan 430 collects the seepage water from the second heat exchanger 410. The second water pan 430 can be connected to a pipe. When the water level reaches a certain set value, the water in the second water pan 430 can be pumped out by a water pump. It is understandable that to ensure sufficient water collection in the second water pan 430, it can be made larger, allowing it to be located below the second heating heat exchanger 410 and the second auxiliary electric heater 420, thus extending the pump start-up time. The second water pan 430 can be detachably connected to the bottom wall of the air handling unit 100.

[0066] Figure 2This is a schematic diagram of a wet film humidifier according to an embodiment of the present invention.

[0067] In one feasible implementation, such as Figure 2 As shown, the wet film humidifier 200 includes a wet film body 210 and a water spraying device. The water spraying device is located above the wet film body 210 and provides water to the wet film body 210.

[0068] The wet film humidifier 200 of this application is a vaporization humidifier. The wet film humidifier 200 includes a wet film body 210 and a water spraying device. The water spraying device wets the wet film body 210, so that the high-temperature hot air passing through the wet film body 210 has a certain humidity.

[0069] It should be noted that the wet membrane body 210 uses a polymer fiber wet membrane. Polymer fiber wet membranes typically refer to fibrous wet-forming materials made of polymers, which have significant advantages in the filtration field. They possess high porosity and a uniform structure, facilitating the passage of high-temperature hot air. While humidifying the high-temperature hot air, they also filter it, ensuring the cleanliness of the humidified air after passing through the wet membrane humidifier 200 and preventing the appearance of "white powder." This reduces scaling and corrosion on the subsequent fans and ducts that transport the heated and humidified air. Furthermore, the polymer fiber wet membrane is flexible and has high tensile strength, making it less prone to damage and extending the service life of the wet membrane humidifier 200. In addition, the polymer fiber wet membrane also has excellent anti-mildew and antibacterial properties, high-pressure energy saving, low pressure resistance, and facilitates the passage of humidified air, while improving the efficiency of humidified air flow.

[0070] In one feasible implementation, the water spraying device includes:

[0071] A water spray pipe 220 is located above the wet film body 210, and multiple water spray nozzles 221 are arranged side by side on the outer periphery of the water spray pipe 220.

[0072] The water supply component is connected to the water spray pipe 220 and provides water to the water spray pipe 220.

[0073] The water spraying device includes a water spray pipe 220 and a water supply component connected to the water spray pipe 220. The water supply component delivers water to the water spray pipe 220 and overflows through the water spray outlet 221, moistening the wet film body 210 below the water spraying device. When the high-temperature hot air generated after passing through the first heating component 300 passes through the wet film body 210, the water molecules on the wet film body 210 are vaporized to form water vapor. Therefore, the humidified air after passing through the wet film humidifier 200 is clean and will not produce "white powder," reducing scaling and corrosion on the subsequent fans and ducts that transport heated and humidified air. It is understandable that the main reason for the formation of "white powder" in humidification is the minerals in the water, especially calcium and magnesium ions. The humidifier converts water into tiny water mist particles. These particles combine with calcium and magnesium ions in the air during diffusion, forming a white powder. This powder is mainly composed of calcium carbonate and magnesium hydroxide, commonly known as water alkali, which is typically found in traditional indoor spray humidification systems. Ultimately, it adheres to the surface of tobacco leaves through the air, affecting quality. The usual solution is to purify tap water, which significantly increases application costs. The wet film humidifier 200 in this application, due to its own humidification process (the filtration characteristics of the wet film body 210), can effectively solve the traditional "white powder" problem, while eliminating the need for water treatment and using tap water, thus simplifying the structure of the heating and humidification device.

[0074] It should be noted that the water spray pipe 220 is horizontally arranged on the top of the wet film body 210, and multiple water spray nozzles 221 are evenly arranged in parallel on the outer peripheral wall of the water spray pipe 220. Water flows out through the water spray nozzles 221, so as to realize the water spraying effect of the water spraying device on the wet film body 210.

[0075] Figure 3 This is a schematic diagram of the normal working position of the water spray pipe according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the water spray pipe protection position according to an embodiment of the present invention.

[0076] In one feasible implementation, such as Figure 3 and Figure 4 As shown, the water spray pipe 220 is rotatably connected to the air handling unit 100, and the water spray nozzle 221 can face towards the wet film body 210 or away from the wet film body 210.

[0077] The water spray pipe 220 is rotatably connected to the air handling unit 100. For example, the fixed end of the motor is connected to the air handling unit 100, and the output shaft of the motor is fixedly connected to the side wall of the water spray pipe 220. The rotation of the motor output shaft drives the rotation of the water spray pipe 220, thereby achieving different orientations of the water spray nozzle 221. It is understood that a limit block can be set to achieve reciprocating switching between two positions: the water spray nozzle 221 facing the wet film body 210 and the position away from the wet film body 210.

[0078] It should be noted that during operation, the initial air, after being heated by the first heating component 300 to form high-temperature hot air, enters the wet film humidifier 200. Under normal operating conditions, the wet film body 210 is not sufficiently moist to withstand the high-temperature conditions, which can easily lead to damage or even ignition of the wet film body. Therefore, if the temperature of the high-temperature hot air passing through the first heating component 300 exceeds the set value (this can be achieved by installing a temperature sensor at the air outlet of the first heating component 300 for feedback), it can drive the water spray pipe 220 to rotate. Figure 4 As shown, the water spray nozzle 221 is oriented towards the wet membrane body 210, directly spraying water onto the wet membrane body 210 (at this time, the water spray pipe 220 is in the water spray pipe protection position), thereby increasing the humidity of the wet membrane body 210 and simultaneously reducing the temperature of the high-temperature hot air passing through the wet membrane body 210. Furthermore, the water supply volume of the water supply component can be increased to further improve the water spraying effect and ensure the safe use of the wet membrane body 210. In the normal operating position, the water spray pipe 220 is rotated to the side away from the wet membrane body 210, as shown... Figure 3 As shown, the water pipe 220 is filled with water and then overflows through the water outlet 221, and then water is sprayed onto the wet film body 210 to form a wet film in the wet film body 210 to achieve the humidification effect.

[0079] In other words, by changing the angle of the water spray pipe 220, the water spray outlet 221 has two working positions, namely the normal working position, such as... Figure 3 As shown, and the protection position of the water spray pipe is as follows Figure 4 As shown, the water spray nozzle 221 in the protected position is directly facing the wet film body 210, spraying water directly onto the wet film body 210. In the normal operating position, the water spray nozzle 221 faces upwards, i.e., away from the wet film body 210, achieving a dripping wetness effect, thus protecting the wet film humidifier 200. It can be understood that the protected position refers to the position under abnormal operating conditions. Normally, when the temperature inside the air handling unit 100 is not lower than 90℃, it is considered a temperature runaway. In this case, the water spray nozzle 220 is in the protected position to prevent open flames from being generated inside the air handling unit 100, improving the safety of the heating and humidifying device. Under normal circumstances, the water spray nozzle 220 is in the normal operating position.

[0080] In one feasible implementation, the water supply assembly includes:

[0081] A water receiving tray 230 is installed inside the air handling unit 100, and the water receiving tray 230 is located below the wet film body 210;

[0082] The circulating water pump has its inlet connected to the water receiving tray 230 and its outlet connected to the water spray pipe 220.

[0083] The water supply component in this application may include a water receiving tray 230 and a circulating water pump connected in sequence. The outlet of the circulating water pump is connected to the spray pipe 220. The water receiving tray 230 is located below the wet film body 210 and is detachably connected to the bottom wall of the air handling unit 100. The inlet of the circulating water pump is the same as that of the water receiving tray 230. Through the action of the circulating water pump, water in the water receiving tray 230 can be pumped into the spray pipe 220 in a timely manner. It is understood that some water will be carried away as water vapor. Therefore, when the water level in the water receiving tray 230 is lower than the minimum allowable water level, water needs to be manually added to the water receiving tray 230.

[0084] In one feasible implementation, the heating and humidifying device further includes an air filter assembly 500, which is disposed inside the air handling unit 100 and located between the fresh air inlet 110 and the first heating assembly 300.

[0085] The air filter assembly 500 is located upstream of the first heating assembly 300. The air filter assembly 500 can filter impurities in the initial air to purify the initial air, ensure the cleanliness of subsequent high-temperature hot air, humid air and heated and humidified hot air, and avoid subsequent pipe scaling and corrosion.

[0086] In one possible implementation, the air filtration assembly 500 includes a primary plate filter 510 and a medium-efficiency bag filter 520, the medium-efficiency bag filter 520 being located between the primary plate filter 510 and the first heating assembly 300.

[0087] The pre-filter 510 can intercept large particulate pollutants, referring to particles larger than 5μm, such as dust, hair, and pollen. It also extends the lifespan of the subsequent medium-efficiency bag filter 520. Furthermore, the pre-filter 510 is economical, durable, easy to replace, has low air resistance, and better ventilation, facilitating the initial airflow. The medium-efficiency bag filter 520 can intercept particles from 1μm to 5μm, such as fine dust, pollen, and bacteria. It is finer than the pre-filter and less expensive than the HEPA filter, making it more economical and practical. The bag filter has a filtration area 2 to 3 times that of the pre-filter, a replacement interval of 6 to 12 months, and a stable structure with low air resistance, ensuring effective passage of the initial filtered air.

[0088] In one feasible embodiment, the heating and humidifying device further includes a fan assembly 600 disposed inside the air handling unit 100, and the fan assembly 600 is located on the side of the second heater 400 away from the wet film humidifier 200.

[0089] The air handling unit 100 is provided with an air outlet 120 and a return air outlet 140. The air outlet 120 is located above the fan assembly 600, and the return air outlet 140 is located near the fresh air inlet 110.

[0090] The fan assembly 600 is located downstream of the second heating assembly 400, and provides power for the airflow. In other words, the fan assembly 600 is an air delivery device that can deliver heated and humidified air to the tobacco storage room, and at the same time, draw in the initial air from the fresh air inlet 110 and the return air inlet 140 by creating negative pressure.

[0091] It should be noted that the air inside the tobacco storage room enters the air handling unit 100 through the return air vent 140, while outdoor air enters the air handling unit 100 through the fresh air vent 110. Using only outdoor air would result in excessive energy consumption for heating and humidification, reducing the economic efficiency of tobacco storage and causing pressure fluctuations within the storage room (due to continuous airflow). Therefore, incorporating the air from the tobacco storage room as part of the initial airflow into the air handling unit 100 reduces energy consumption for the first heating element 300, the wet film humidifier 200, and the second heating element 400, lowering the cost of heating and humidifying the tobacco, improving the economic efficiency of tobacco storage, and ensuring stable pressure within the storage room. This is beneficial for long-term tobacco storage and prevents the instantaneous loss of the tobacco's internal chemical components.

[0092] It is understood that the detachable connection in this application can be a bolt connection or a bayonet connection, which will not be elaborated further.

[0093] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0094] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0095] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heating and humidifying device for tobacco leaves, characterized in that, The heating and humidifying device includes: A blower unit, which is equipped with a fresh air inlet and an air outlet; A wet film humidifier is installed inside the air handling unit; The first heating component is disposed inside the blower unit; The second heating component is disposed inside the air handling unit, and the first heating component and the second heating component are located on both sides of the wet film humidifier; The air entering through the fresh air inlet passes sequentially through the first heating component, the wet film humidifier, and the second heating component before being discharged through the air outlet.

2. The heating and humidifying device for tobacco leaves according to claim 1, characterized in that, The first heating assembly includes a first heat exchange heater and a first auxiliary electric heater arranged side by side, with the first auxiliary electric heater located between the first heat exchange heater and the wet film humidifier; The first heating component further includes a first water tray, which is disposed below the first heat exchange heater and the first auxiliary electric heater, and is located inside the air handling unit.

3. The heating and humidifying device for tobacco leaves according to claim 1, characterized in that, The second heating assembly includes a second heat exchange heater and a second auxiliary electric heater arranged in parallel, with the second heat exchange heater located between the second auxiliary electric heater and the wet film humidifier; The second heating component also includes a second water pan, which is disposed below the second heat exchange heater and the second auxiliary electric heater, and is located inside the blower cabinet.

4. The heating and humidifying device for tobacco leaves according to claim 1, characterized in that, The wet film humidifier includes a wet film body and a water spraying device, which is located above the wet film body and provides water to the wet film body.

5. The heating and humidifying device for tobacco leaves according to claim 4, characterized in that, The water spraying device includes: A water spray pipe is located above the wet film body, and multiple water spray outlets are arranged side by side on the outer periphery of the water spray pipe; A water supply component is connected to the water spray pipe, and the water supply component provides the water source to the water spray pipe.

6. The heating and humidifying device for tobacco leaves according to claim 5, characterized in that, The water spray pipe is rotatably connected to the air handling unit, and the water spray outlet can face towards the wet film or away from the wet film.

7. The heating and humidifying device for tobacco leaves according to claim 5, characterized in that, Water supply components include: A water receiving tray is provided inside the air handling unit, and the water receiving tray is located below the wet membrane body; A circulating water pump, wherein the inlet of the circulating water pump is connected to the water receiving tray, and the outlet of the circulating water pump is connected to the water spray pipe.

8. The heating and humidifying device for tobacco leaves according to claim 1, characterized in that, The heating and humidifying device also includes an air filter assembly, which is disposed inside the air handling unit and located between the fresh air inlet and the first heating assembly.

9. The heating and humidifying device for tobacco leaves according to claim 8, characterized in that, The air filtration assembly includes a pre-filter and a medium-efficiency bag filter, with the medium-efficiency bag filter located between the pre-filter and the first heating assembly.

10. The heating and humidifying device for tobacco leaves according to claim 1, characterized in that, The heating and humidifying device also includes a fan assembly, which is disposed inside the air cabinet, and the fan assembly is located on the side of the second heater away from the wet film humidifier; The air handling unit is provided with an air outlet and an air return outlet. The air outlet is located above the fan assembly, and the air return outlet is located near the fresh air inlet.

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