Constant-temperature water supply device for tobacco moisture regaining machine
By designing a constant temperature water supply device for tobacco moisture retrieval machine, the heated warm water is transported from the first water tank to the second water tank using the return pipe, the problem of unstable water supply temperature of the existing water supply device is solved, and the passing rate and production quality of the water temperature are improved.
Patent Information
- Application Number
- CN202421418200.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The existing tobacco loose moisture reflux water supply device has poor stability and low pass rate of water temperature, resulting in product process quality defects, and requires preheating before use, resulting in low production efficiency.
A constant temperature water supply device including a first water tank and a second water tank is designed, and the warm water that has been heated to a set temperature is transported from the first water tank to the second water tank through the return water pipe to ensure that the warm water in the second water tank remains constant and reduce fluctuations in the outlet water temperature.
It improves the stability coefficient of water supply temperature, improves the pass rate of water temperature, reduces the process quality defects of the product, and improves the production quality and production efficiency of loose reflux tobacco.
Smart Images
Figure CN222828100U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tobacco rehumidification machine equipment, in particular to a constant temperature water supply device used for a tobacco rehumidification machine. Background Art
[0002] The loosening and moisture regaining of tobacco is achieved by first using a knife to split the tobacco blocks for a second time. The tobacco blocks after splitting need to be heated and humidified to achieve loosening and moisture regaining. To ensure that the quality indicators meet the standards, it is generally required that the moisture content of the exported material meet 20.0%±1.5%, and the temperature of the exported material be 60.0℃±3.0℃. The water supply device can provide the necessary moisture for the tobacco leaves, and the temperature process parameters of the warm water should be controlled at 80℃±3℃.
[0003] At present, the commonly used water supply device in loose rehumidification is to pre-heat the water temperature of the water tank to the set temperature through steam, and at the same time continuously supply cold water to the water tank; because the overall water temperature of the water tank will drop sharply after the cold water is mixed in, it takes a certain amount of time to reach the set temperature by passing steam for heating. Combined with the application scenario of loose rehumidification of tobacco, it is necessary to provide steam spray through the nozzle, and the water output at the nozzle end should not be too large. The warm water needs to be stored at a constant temperature in the water tank for a long time, which makes the warm water in the water tank easily dissipate heat and fall below the required temperature; in the process of water supply, the water temperature will fluctuate back and forth (in the form of a sine wave) for a long time, and the maximum fluctuation can reach ±5℃.
[0004] As mentioned above, the existing tobacco loosening and rehumidifying water supply device, due to the reciprocating fluctuation of the water supply temperature, on the one hand, causes the stability coefficient of the hot water temperature CPK < 1, and the CPK value reflects the stability of the production process. The larger the better, it is generally required to be greater than 1; on the other hand, it will also reduce the qualified rate of the hot water temperature. The qualified rate of the water temperature is a process parameter of this process, and has strict assessment standards, requiring the qualified rate ≥ 98%; therefore, the traditional water supply device will eventually lead to process quality defects in the loose and rehumidified products due to the poor stability coefficient of the hot water temperature and the low qualified rate of the water temperature; and the above-mentioned existing tobacco loosening and rehumidifying device needs to be preheated before use, and the water tank also needs to be preheated with steam for heating. When the rehumidifier is preheated, the water supply device heats up slowly, especially in winter, and it takes a long time to reach the set temperature. It is necessary to wait for the water supply device to be preheated before starting, resulting in low production efficiency. Utility Model Content
[0005] The purpose of the utility model is to provide a constant temperature water supply device for a tobacco rehumidification machine in view of the problems of poor stability coefficient of hot water temperature and low qualified rate of water temperature in the water supply device of the rehumidification machine in the prior art, comprising: a first water tank and a second water tank; the first water tank is provided with a water inlet, the water inlet is used to connect to a water source, the first water tank is provided with a first steam inlet, the first steam inlet is used to introduce steam, and thus the water in the first water tank can be heated; a return water pipe connected to the first water tank and the second water tank is provided between the first water tank and the second water tank, and the first water tank can supply water to the second water tank through the return water pipe; the second water tank is provided with a water outlet, the water outlet is used to connect to the nozzle of the rehumidification machine.
[0006] The utility model provides a first water tank and a second water tank, cold water is introduced into the first water tank and steam is introduced through a first steam inlet for heating, and the warm water heated to a set temperature in the first water tank can be discharged into the second water tank through a return pipe, so that the second water tank is filled with warm water, thereby providing the second water tank with warm water that has been heated to the set temperature; after the temperature of the warm water in the second water tank is reduced due to heat dissipation, water with a higher temperature can be supplied to the second water tank through the return pipe, so that the high-temperature water is mixed with the relatively low-temperature water, and the warm water in the second water tank is kept at a constant temperature as much as possible, thereby reducing the water temperature fluctuation of the water discharged from the water outlet of the second water tank, making the water temperature sprayed by the nozzle more stable, improving the stability coefficient of the water supply temperature, and improving the qualified rate of the water temperature, thereby reducing the process quality defects of the loose moisture recovery product and improving the production quality of the loose moisture recovery of tobacco.
[0007] Preferably, in the constant temperature water supply device for a tobacco rehumidifying machine described in the utility model, the second water tank is provided with a first thermometer and a second steam inlet, and the second steam inlet is used to introduce steam into the second water tank, thereby heating the water in the second water tank.
[0008] As a preferred solution of the utility model, the first water tank supplies warm water to the second water tank through the return pipe. After the first large-scale temperature adjustment is achieved, heat will be lost during the warm water transportation or storage process, resulting in slight fluctuations in the water temperature in the second water tank. By setting up a first thermometer, the water temperature of the second water tank can be detected in real time. If the temperature of the second water tank deviates from the set temperature and exceeds the allowable deviation range, the second water tank is compensated and heated through the second steam inlet, so that the water temperature in the second water tank is adjusted again, thereby further reducing the water temperature fluctuation of the water supply, further increasing the stability coefficient of the water supply temperature, and improving the performance of the device.
[0009] Preferably, in the constant temperature water supply device for a tobacco rehumidification machine described in the utility model, the first water tank and the second water tank are rectangular parallelepipeds of the same shape, the return water pipe is U-shaped, and the return water pipe is located on the sides of the first water tank and the second water tank; the two ends of the return water pipe are respectively connected to the lower part of the first water tank and the upper part of the second water tank.
[0010] As a preferred embodiment of the present invention, the first water tank and the second water tank are combined with the rectangular parallelepiped, so that the first water tank and the second water tank can store warm water conveniently, and the warm water surface of the first water tank can be the plane of the bottom surface of the rectangular parallelepiped. By setting a U-shaped return pipe, the warm water in the first water tank can be easily discharged into the second water tank with the help of the gravity of the water flow itself and the function of the communicating vessel. By connecting the upper end of the return pipe to the lower part of the side of the first water tank, the water pressure in the U-shaped return pipe can be increased as much as possible, so that the first water tank can supply water to the second water tank more smoothly, further improving the performance of the device.
[0011] Preferably, in the constant temperature water supply device for a tobacco rehumidification machine described in the utility model, the first water tank and the second water tank are respectively configured as an upper water tank and a lower water tank with opposite bottom surfaces, and a thermal insulation layer is provided between the bottom surfaces of the first water tank and the second water tank.
[0012] As a preferred solution of the utility model, by arranging the first water tank and the second water tank as an upper water tank and a lower water tank connected to each other on the bottom, on the one hand, it is ensured that the first water tank and the second water tank are adjacent to each other and have a compact structure, which is convenient for placement and use; on the other hand, the heat exchange temperature difference of the two water tanks is reduced, and the constant temperature performance is improved. Then, by arranging a thermal insulation layer between the first water tank and the second water tank, the adjacent upper water tank and the lower water tank will not be in direct contact, thereby avoiding the water temperature of the first water tank affecting the stability of the water temperature in the second water tank due to excessive heating, thereby facilitating the adjustment of the first water tank to a higher heating temperature and quickly heating up, and does not affect the water temperature of the second water tank, thereby enhancing the constant temperature effect of the warm water supplied by the second water tank, and further improving the constant temperature stability performance of the device.
[0013] Preferably, the constant temperature water supply device for the tobacco rehumidification machine described in the utility model further includes a control system, and the control system is used to control the opening and closing of the first steam inlet, the water inlet, the return pipe and the water outlet.
[0014] As a preferred solution of the utility model, by setting up the control system, the opening or closing of the first steam inlet can be controlled by the control system, and then the first steam inlet can be automatically opened or closed according to the water temperature of the first water tank. Compared with manual control, the water temperature in the first water tank can be heated or stopped more accurately; and, by controlling the opening or closing of the water inlet through the control system, the water inlet can be opened or closed more accurately according to the water level in the first water tank, avoiding overflow due to excessive water level, thereby improving the safety of the use of the device, and on the other hand, saving manpower operation, further improving the convenience of the use of the device.
[0015] Preferably, in the constant temperature water supply device for a tobacco rehumidification machine described in the utility model, the first water tank is provided with a first liquid level gauge and a second thermometer, and the first liquid level gauge and the second thermometer are connected to the control system via electrical signals.
[0016] As a preferred solution of the utility model, by arranging a first liquid level meter in the first water tank, the lowest liquid level and the highest liquid level of the first water tank can be measured in real time, and the signal is transmitted to the control system. If the water in the first water tank is at the lowest liquid level, the control system controls to open the water inlet to supply water to the first water tank. If the water in the first water tank is at the highest liquid level, the control system controls to close the water inlet, thereby avoiding manual inspection and further enhancing the convenience of using the device; and, by arranging a second thermometer in the first water tank, the water temperature of the first water tank can be measured in real time, and the value of the water temperature is transmitted to the control system through an electrical signal; if the water temperature does not reach the set value or the water in the first water tank needs to be heated, the control system controls to open the first steam inlet, and then heat the water in the first water tank; when the water temperature in the first water tank reaches the temperature set value, the control system receives the signal of the second thermometer, and then stops passing steam into the first water tank, thereby stopping heating the first water tank, achieving more accurate control of the water temperature of the first water tank, further increasing the water temperature stability coefficient of the hot water supplied by the device, and improving the performance of the device.
[0017] Preferably, in the constant temperature water supply device for a tobacco rehumidification machine described in the utility model, the second water tank is provided with a second liquid level gauge, the return water pipe is provided with a pneumatic control valve, and the pneumatic control valve and the second liquid level gauge are connected to the control system via electrical signals.
[0018] As a preferred solution of the present invention, by arranging a second liquid level gauge in the second water tank, the water level in the second water tank can be detected more accurately, and then connected to the control system through an electrical signal, so that the control system controls the opening or closing of the pneumatic control valve according to the detection condition of the second liquid level gauge. When the first liquid level gauge detects a low water level in the second water tank, the pneumatic control valve is opened through the control system to supply water to the second water tank. When the second liquid level gauge detects a high water level, the pneumatic control valve is closed to stop supplying water to the second water tank, thereby achieving more accurate and intelligent control of the water supply to the second water tank, improving the stable control performance of the device on the water temperature, improving the water temperature stability coefficient, and further improving the performance of the device.
[0019] Preferably, in the constant temperature water supply device for a tobacco rehumidifying machine described in the utility model, an inspection port is provided on the top of the first water tank; the inspection port is provided with a detachable and fixed opening cover, and a handle is provided in the middle of the opening cover.
[0020] As a preferred solution of the utility model, an inspection port is provided on the top of the first water tank, and a detachable fixed opening cover is provided in combination. If a problem occurs with the equipment, the opening cover can be removed and opened to facilitate inspection, observation and repair, thereby further improving the performance of the device.
[0021] Preferably, in the constant temperature water supply device for the tobacco rehumidification machine described in the utility model, a discharge pipe is also provided at the bottom of the second water tank; the discharge pipe is provided with an on-off valve, and the discharge pipe is used to discharge the cold water or waste residue in the second water tank.
[0022] As a preferred solution of the utility model, when the device is not in use, steam heating is not introduced into the first water tank of the device, cold water or waste residue will be stored in the second water tank, and a discharge pipe is provided at the bottom of the second water tank to replace other water absorption or pumping methods, making it more convenient to discharge the wastewater or sewage in the second water tank, thereby further improving the performance of the device.
[0023] Preferably, in the constant temperature water supply device for the tobacco rehumidification machine described in the utility model, the water outlet is arranged at the bottom of the second water tank, the water outlet is connected to the nozzle of the rehumidification machine through an L-shaped pipe, and the L-shaped pipe extends horizontally toward the side close to the return pipe.
[0024] As a preferred solution of the utility model, by arranging the water outlet at the bottom of the second water tank, it can be flush with the bottom of the second water tank in combination with the principle of communicating vessels, so that the warm water located at the bottom of the second water tank can be discharged, thereby further ensuring that the water introduced into the nozzle is warm water that has been fully mixed in the second water tank and has a relatively constant temperature, further improving the water temperature coefficient of the water supplied by the device, reducing the water temperature fluctuation of the water supply, and further improving the performance of the device. In addition, the L-shaped pipe is horizontally extended toward the side close to the return pipe to maintain the water supply pressure connected to the nozzle of the dehumidification machine, thereby further optimizing the performance of the device.
[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0026] By setting up a first water tank and a second water tank, cold water is passed into the first water tank and heated by steam, and steam is passed into the first steam inlet for heating, so that the water in the first water tank can be heated more evenly and safely during the heating process; through the function of the return pipe, warm water that has been heated to a set temperature is provided to the second water tank, and after the temperature of the warm water in the second water tank is lowered due to heat dissipation, higher temperature water can be supplied to the second water tank through the return pipe, so that the warm water in the second water tank can be kept at a constant temperature as much as possible, thereby reducing the water temperature fluctuation of the outlet water of the second water tank, making the temperature of the warm water sprayed from the nozzle more stable, improving the stability coefficient of the water supply temperature, and improving the qualified rate of the water temperature, thereby reducing the process quality defects of the loose moisture recovery products and improving the process and production quality of the loose moisture recovery of tobacco. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural stereogram a of the utility model;
[0028] Figure 2 It is a structural stereogram b of the utility model;
[0029] Icons: 1. First water tank; 11. Water inlet; 12. First steam inlet; 13. First liquid level gauge; 14. Second thermometer; 15. Inspection port; 151. Opening cover; 152. Handle; 25. Discharge pipe; 251. On-off valve; 2. Second water tank; 21. Water outlet; 22. First thermometer; 23. Second steam inlet; 24. Second liquid level gauge; 3. Return pipe; 4. Thermal insulation layer. DETAILED DESCRIPTION
[0030] The utility model is described in detail below in conjunction with the accompanying drawings.
[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0032] Example 1
[0033] like Figure 1 and Figure 2 As shown, the constant temperature water supply device for a tobacco rehumidification machine described in the utility model comprises: a first water tank 1 and a second water tank 2; the first water tank 1 is provided with a water inlet 11, the water inlet 11 is used to connect to a water source, the first water tank 1 is provided with a first steam inlet 12, the first steam inlet 12 is used to introduce steam, and thus the water in the first water tank 1 can be heated; a return water pipe 3 connected to the first water tank 1 and the second water tank 2 is provided between the first water tank 1 and the second water tank 2, and the first water tank 1 can supply water to the second water tank 2 through the return water pipe 3; the second water tank 2 is provided with a water outlet 21, and the water outlet 21 is used to connect to the nozzle of the rehumidification machine.
[0034] It should be noted that the water inlet 11, the steam inlet and the water outlet 21 can be understood as openings provided in the first water tank 1 or the second water tank 2 and capable of allowing liquid to flow out and in. By connecting the water inlet pipe to the water inlet 11, it is possible to supply water to the first water tank 1; by connecting the steam inlet pipe at the first steam inlet 12, it is possible to provide steam to the first water tank 1; by connecting the outlet pipe at the water outlet 21, it is possible to connect the warm water in the second water tank 2 to the nozzle of the dehumidification machine; specifically, an on-off valve 251 can be provided in the pipeline adjacent to the above-mentioned opening to open or close such opening.
[0035] Specifically, Figure 2 As shown, according to the demand for hot water in the production process, the warm water (humidification water) that meets the standard temperature range after being heated in the second water tank 2 passes through a hot water pump and an electromagnetic flowmeter and then enters the humidification water nozzle in the rehumidification machine. The material is treated with water under the action of steam atomization to realize water supply to the tobacco rehumidification machine.
[0036] In the present invention, specifically, the common volume of the first water tank 1 and the second water tank 2 can be 300L. Specifically, Figure 1 and Figure 2 As shown, the first water tank 1 and the second water tank 2 are rectangular parallelepipeds of the same shape and can have the same volume, which is 150L respectively; the return pipe 3 is U-shaped, and the return pipe 3 is arranged on the side of the first water tank 1 and the second water tank 2; the two ends of the return pipe 3 are respectively connected to the lower part of the first water tank 1 and the upper part of the second water tank 2; the U-shaped pipe can be provided with an on-off valve 251, which is opened or closed to realize water supply or stop water supply from the first water tank 1 to the second water tank 2.
[0037] Specifically, the second water tank 2 is provided with a first thermometer 22 and a second steam inlet 23, and the second steam inlet 23 is used to introduce steam into the second water tank 2, thereby heating the water in the second water tank 2; specifically, the first thermometer 22 can measure the water temperature in the second water tank 2 through a temperature sensor, and then display it through a temperature digital display instrument, so as to facilitate the observation of the water temperature in the second water tank 2; specifically, during the production process, the first water tank 1 and the second water tank 2 can also perform steam heating, water intake, and water supply at the same time; for example, the pipes of the water inlet 11, the first steam inlet 12, and the second steam inlet 23 can be provided with pneumatic angle valves, and the pipes of the return pipe 3 and the water outlet 21 can be provided with pneumatic ball valves.
[0038] In this embodiment, the first water tank 1 and the second water tank 2 are respectively configured as an upper water tank and a lower water tank whose bottom surfaces are connected to each other, and a thermal insulation layer 4 is provided between the bottom surfaces of the first water tank 1 and the second water tank 2; specifically, Figure 1 or Figure 2 As shown, the thermal insulation layer 4 can be set as a wool felt located between the bottom surfaces of the first water tank 1 and the second water tank 2.
[0039] Specifically, the constant temperature water supply device for the tobacco rehumidification machine described in the utility model also includes a control system, which is used to control the switches of the first steam inlet 12, the water inlet 11, the return pipe 3 and the water outlet 21; for example, an on-off valve 251 is arranged in the pipeline of the steam inlet, and when it is detected that the water temperature in the first water tank 1 reaches the set temperature, the valve at the steam inlet can be automatically closed through the action of the control system.
[0040] In this embodiment, a first liquid level gauge 13 may be provided in the first water tank 1, and the first liquid level gauge 13 is connected to the control system through an electrical signal; a second thermometer 14 may be provided in the first water tank 1, and the second thermometer 14 is connected to the control system through an electrical signal; a second liquid level gauge 24 may be provided in the second water tank 2, and a pneumatic control valve may be provided in the return pipe 3, and the pneumatic control valve and the second liquid level gauge 24 may be connected to the control system through an electrical signal; specifically, Figure 1 As shown, the first liquid level gauge 13 is arranged on the outside of the first water tank 1, and can measure the height of the water level in the first water tank 1. The first liquid level gauge 13 and the second liquid level gauge 24 both include a high liquid level detection element and a low liquid level detection element. The height of the water level is displayed by the liquid level gauge, and the highest liquid level and the lowest liquid level of the water level in the first water tank 1 or the second water tank 2 are obtained, and then the water inlet and heating of the first water tank 1 and the second water tank 2 are controlled in cooperation with the control system.
[0041] refer to Figure 1 As shown, Figure 1 The top view of the first water tank 1 is a partial cross-sectional view. Specifically, an inspection port 15 is provided at the top of the first water tank 1 of the utility model; the inspection port 15 is provided with a detachable and fixed opening cover 151, and a handle 152 is provided in the middle of the opening cover 151.
[0042] Specifically, a discharge pipe 25 is provided at the bottom of the second water tank 2 ; the discharge pipe 25 is provided with an on-off valve 251 , and the discharge pipe 25 is used to discharge the cold water or waste residue in the second water tank 2 .
[0043] Specifically, the water outlet 21 is disposed at the bottom of the second water tank 2 , and the water outlet 21 is connected to the nozzle of the dehumidification machine through an L-shaped pipe, and the L-shaped pipe extends toward the side of the second water tank 2 .
[0044] It should be noted that since the rehumidification and loosening process is greatly affected by the water temperature fluctuation of the water supply, a high stability of the water temperature is required. Unlike household water heaters (a water temperature fluctuation of a few degrees Celsius does not have much impact on the use), the utility model is dedicated to tobacco machinery production, but is not limited to tobacco production. It has been verified in actual use that the utility model is used in the loosening and rehumidification process, which can effectively prevent excessive cold water from intervening and affecting the overall water temperature, thereby ensuring the stability of the warm water temperature in the water tank, making the CPK of the warm water temperature ≥1, and the qualified rate of the warm water temperature reaches 100%.
[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A constant temperature water supply device for a tobacco rehumidification machine, characterized in that: include: A first water tank (1) and a second water tank (2); the first water tank is provided with a water inlet (11), the water inlet (11) is used to connect to a water source, the first water tank (1) is provided with a steam inlet, the steam inlet is used to introduce steam, and thus the water in the first water tank (1) is heated; a return pipe (3) is provided between the first water tank (1) and the second water tank (2), the first water tank (1) can supply water to the second water tank (2) through the return pipe (3); the second water tank (2) is provided with a water outlet (21), the water outlet (21) is used to connect to a nozzle of a dehumidifying machine.
2. The constant temperature water supply device for a tobacco rehumidification machine according to claim 1, characterized in that: The second water tank (2) is provided with a first temperature measuring instrument (22) and a second steam inlet, wherein the second steam inlet is used to pass steam into the second water tank (2) to heat the water in the second water tank (2).
3. The constant temperature water supply device for a tobacco rehumidification machine according to claim 1, characterized in that: The first water tank (1) and the second water tank (2) are rectangular parallelepipeds of the same shape; the return pipe (3) is U-shaped; the return pipe (3) is located on the sides of the first water tank (1) and the second water tank (2); the two ends of the return pipe (3) are respectively connected to the lower part of the first water tank (1) and the upper part of the second water tank (2).
4. The constant temperature water supply device for a tobacco rehumidification machine according to claim 1, characterized in that: The first water tank (1) and the second water tank (2) are respectively arranged as an upper water tank and a lower water tank with their bottom surfaces facing each other, and a thermal insulation layer (4) is arranged between the bottom surfaces of the first water tank (1) and the second water tank (2).
5. The constant temperature water supply device for a tobacco rehumidification machine according to any one of claims 1 to 4, characterized in that: It also comprises a control system, which is used to control the opening and closing of the steam inlet, the water inlet (11), the water return pipe (3) and the water outlet (21).
6. The constant temperature water supply device for a tobacco rehumidification machine according to claim 5, characterized in that: The first water tank (1) is provided with a first liquid level meter (13) and a second temperature measuring instrument (14); the first liquid level meter (13) and the second temperature measuring instrument (14) are connected to the control system via electrical signals.
7. The constant temperature water supply device for a tobacco rehumidification machine according to claim 5, characterized in that: The second water tank (2) is provided with a second liquid level meter (24), the return water pipe (3) is provided with a pneumatic control valve, and the pneumatic control valve and the second liquid level meter (24) are connected to the control system via electrical signals.
8. The constant temperature water supply device for a tobacco rehumidification machine according to any one of claims 1 to 4, characterized in that: The top of the first water tank (1) is provided with an inspection opening (15); the inspection opening (15) is provided with a detachable and fixed opening cover (151), and a handle (152) is provided in the middle of the opening cover (151).
9. The constant temperature water supply device for a tobacco rehumidification machine according to any one of claims 1 to 4, characterized in that: A discharge pipe (25) is also provided at the bottom of the second water tank (2); the discharge pipe (25) is provided with an on-off valve (251), and the discharge pipe (25) is used to discharge cold water or waste residue in the second water tank (2).
10. The constant temperature water supply device for a tobacco rehumidification machine according to claim 1, characterized in that: The water outlet (21) is arranged at the bottom of the second water tank (2), and the water outlet (21) is connected to the nozzle of the dehumidification machine through an L-shaped pipe, and the L-shaped pipe extends horizontally toward a side close to the return pipe (3).