Closed-loop tobacco flue-curing machine with active moisture removal function

Abstract

The utility model relates to the technical field of tobacco curing equipment, in particular to a closed-loop tobacco curing machine with an active moisture removal function, which comprises a heat circulation mechanism, a moisture removal mechanism and a moisture removal mechanism, comprising a heat interaction unit used for absorbing heat in high-humidity hot air in a drying room so as to cool the high-humidity hot air. The dehumidifying unit is connected with the heat interaction assembly and used for dehumidifying the high-humidity hot air; the condenser is partially arranged above the dehumidifying unit and used for condensing heat in the drying room, discharging the heat out of the drying room and outputting high-temperature hot air; and the drying mechanism is used for drying the tobacco leaves and comprises a circulating fan which is arranged above the condenser and is used for exhausting the high-temperature hot air into the drying room and a fresh air input unit which is arranged above the condenser and is used for inputting fresh air in a standard humidity range into the drying room. According to the utility model, the circulation transfer of heat is realized, and the active dehumidification function is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a closed loop tobacco roaster with active moisture removal function. BACKGROUND

[0002] Tobacco roasting is a key link in the tobacco processing process, and its quality directly affects the quality of tobacco products. With the continuous improvement of the quality requirements of the tobacco processing industry for tobacco leaves, the perfection of the function and the precision control of the tobacco roasting device have become an inevitable trend. The development from a simple natural ventilation mode to a device capable of actively adjusting humidity is a manifestation of technological progress. Under the background of energy shortage and increasingly stringent environmental protection requirements, the closed loop tobacco roaster with active moisture removal function also needs to consider energy saving and environmental protection factors. A reasonable humidification function can reduce the waste caused by damage to tobacco leaves due to improper humidity, and also helps to reduce dust and other pollutants that may be generated due to excessive drying during the tobacco roasting process, which is conducive to environmental protection during the tobacco processing process.

[0003] Chinese patent publication No. CN206213257U discloses a new energy-saving tobacco roasting equipment, which comprises a unit room, a heating chamber, a roasting chamber, a front partition, a rear partition, and an intelligent controller. The unit room is connected with the heating chamber through the front partition, and the heating chamber is connected with the roasting chamber through the rear partition. An upper air door and a lower air door are arranged on the side wall of the unit room, and a heat pump main unit, an internal fresh air duct are arranged in the unit room. An internal fresh air door and a moisture removal port are arranged on the front partition. An external fresh air door is arranged on the side wall of the heating chamber. A heat exchanger and a circulating fan are arranged in the heating chamber from bottom to top. The heat exchanger is connected with the heat pump main unit. An air inlet is arranged on the upper part of the rear partition, and an air return is arranged on the lower part of the rear partition. The utility model fully recovers the hot and humid air discharged from the roasting chamber to the closed unit room, improves the working environment temperature of the heat pump, ensures that the tobacco can be normally dehydrated and dried at low environmental temperature, and has simple structure and easy realization, which improves the energy utilization rate. It can be seen that the new energy-saving tobacco roasting equipment of the utility model has the problem of insufficient tobacco roasting effectiveness due to the inability to recycle high-humidity hot air. SUMMARY

[0004] Therefore, the utility model provides a closed loop tobacco roaster with active moisture removal function to overcome the problem of insufficient tobacco roasting effectiveness due to the inability to recycle high-humidity hot air in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a closed loop tobacco roaster with active moisture removal function, which comprises:

[0006] The heat circulation mechanism is used to collect the heat in the drying room to output high-temperature hot air, including a heat exchange unit used to absorb the heat in the high-humidity hot air in the drying room to cool the high-humidity hot air, a dehumidification unit connected with the heat exchange unit to dehumidify the high-humidity hot air, and a condenser partially arranged above the dehumidification unit to condense the heat in the drying room and output high-temperature hot air;

[0007] The drying mechanism is arranged above the heat circulation mechanism and is used to dry the tobacco leaves, including a circulating fan arranged above the condenser to output the high-temperature hot air into the drying room, and a fresh air input unit arranged above the condenser to input fresh air with a standard humidity range into the drying room.

[0008] Further, the heat exchange unit includes:

[0009] An air inlet is used to provide an access channel for the high-humidity hot air in the drying room;

[0010] A core heat exchanger is partially arranged above the air inlet and is used to absorb the heat in the high-humidity hot air coming from the air inlet to reduce the temperature of the high-humidity hot air to the dew point temperature.

[0011] A bracket is arranged below the core heat exchanger and is fixedly connected with the core heat exchanger to fix the spatial position of the core heat exchanger.

[0012] Further, the dehumidification unit includes:

[0013] A first dehumidification fan is partially arranged above the core heat exchanger away from the air inlet and is used to deliver the high-humidity hot air output by the core heat exchanger to an evaporation assembly;

[0014] A second dehumidification fan is partially arranged above the core heat exchanger away from the air inlet and is used to deliver the primary dehumidification hot air output by the evaporation assembly to an internal evaporator;

[0015] The evaporation assembly is partially arranged above the dehumidification fan and is used to absorb the heat in the drying room by evaporation of low-temperature and low-pressure refrigerant to evaporatively dehumidify the high-humidity hot air output by the dehumidification fan to output the primary dehumidification hot air.

[0016] A compressor is arranged below the evaporation assembly and is used to compress the low-temperature and low-pressure refrigerant to output high-temperature and high-pressure refrigerant gas to a corresponding condensing position.

[0017] The internal evaporator is connected with the dehumidification fan and is used to output the secondary dehumidification hot air by evaporating the liquid water in the primary dehumidification hot air.

[0018] Further, the evaporation assembly comprises:

[0019] An evaporation fan for transferring heat from the outside to the low-temperature and low-pressure refrigerant;

[0020] An external evaporator connected to the evaporation fan for absorbing air heat from the outside by the low-temperature and low-pressure refrigerant to evaporatively dehumidify the high-humidity and hot air output by the dehumidification fan and output the primary dehumidification hot air.

[0021] Further, the humidity of the primary dehumidification hot air is greater than the humidity in the secondary dehumidification hot air.

[0022] Further, the fresh air input unit comprises:

[0023] A fresh air door arranged above the condenser for inputting low-humidity fresh air to the output end of the condenser;

[0024] A humidity sensor connected to the fresh air door for detecting the air humidity outside the fresh air door.

[0025] Further, the width of the internal evaporator in the horizontal direction is less than the width of the external evaporator in the horizontal direction.

[0026] Further, the dehumidification unit further comprises:

[0027] A first inlet arranged above the core heat exchanger for absorbing the high-humidity and hot air output by the core heat exchanger;

[0028] A first outlet partially arranged above the first inlet for conveying the high-humidity and hot air to the external evaporator;

[0029] A second inlet arranged below the first outlet for absorbing the medium-humidity and hot air discharged by the external evaporator;

[0030] A second outlet arranged below the second outlet for conveying the medium-humidity and hot air to the internal evaporator.

[0031] Further, an internal expansion valve is arranged above the internal evaporator for controlling the entering flow of the medium-humidity and hot air.

[0032] Further, an external expansion valve is arranged below the external evaporator for controlling the flow of the low-temperature and low-pressure refrigerant into the external evaporator.

[0033] Compared with the prior art, the beneficial effects of the utility model lie in: the utility model through setting up external evaporator, absorbs heat energy in external air to make condenser radiate heat and heat tobacco by radiated heat; through setting up internal evaporator, effectively removes moisture in hot and humid air and transfers heat energy in moisture to condenser as heat for heating tobacco; when temperature or humidity in drying room is too high, start dehumidification fan and open fresh air door, so that low humidity fresh air from outside enters drying room through output end of condenser; and high humidity hot air output by first dehumidification fan absorbs heat energy in external evaporator and enters heat cycle through second outlet, realizing dehumidification, moisture removal and output of high temperature hot air.

[0034] Further, the utility model discloses dehumidification fan, evaporator assembly and internal evaporator, realize the effective removal of moisture in high humidity hot air, overcome the problem that the quality of tobacco is influenced due to too high humidity in tobacco environment, and make circulating hot air keep proper humidity, improve the quality and efficiency of tobacco baking.

[0035] Further, the utility model discloses fresh air door, when temperature or humidity in drying room is too high, introduce low humidity fresh air from outside environment to control humidity and temperature in drying room, realize that the temperature and humidity of tobacco drying environment keep in proper range, realize the improvement of quality stability of tobacco baking. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is whole structure diagram of closed loop tobacco baking machine of the utility model embodiment with active moisture removal function;

[0037] Figure 2 It is working process schematic view of closed loop tobacco baking machine of the utility model embodiment with active moisture removal function;

[0038] The signs are as follows: 1-evaporator fan, 2-external evaporator, 3-humidity sensor, 4-fresh air door, 5-circulating fan, 6-condenser, 7-first dehumidification fan, 8-core heat exchanger, 9-bracket, 10-internal evaporator, 11-compressor, 12-first inlet, 13-air inlet, 14-internal expansion valve, 15-second outlet, 16-external expansion valve, 17-first outlet. DETAILED DESCRIPTION

[0039] In order to make the purpose and the advantage of the utility model more clear and obvious, the utility model is further described below with examples;It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0040] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0041] Please refer to Figure 1 As shown in the figure, it is the overall structure diagram of the closed-loop tobacco roaster with active moisture removal function. The closed-loop tobacco roaster with active moisture removal function comprises:

[0042] The heat circulation mechanism is used to collect the heat in the drying room to output high-temperature hot air, comprising a heat exchange unit used to absorb the heat in the high-humidity hot air in the drying room to cool the high-humidity hot air, a dehumidification unit connected with the heat exchange unit to dehumidify the high-humidity hot air, and a condenser 6 disposed above the dehumidification unit to condense the heat in the drying room and output high-temperature hot air.

[0043] The drying mechanism is disposed above the heat circulation mechanism and is used to dry the tobacco leaves, comprising a circulating fan 5 disposed above the condenser 6 to discharge the high-temperature hot air into the drying room, and a fresh air input unit disposed above the condenser 6 to input fresh air with standard humidity range into the drying room.

[0044] In the implementation, the external evaporator 2 is provided to absorb the heat energy in the external air, so that the condenser 6 dissipates heat and heats and dries the tobacco leaves through the dissipated heat; the built-in evaporator 10 is provided to effectively remove the moisture in the medium-humidity hot air and transfer the heat energy in the moisture to the condenser 6 as the heat for heating the tobacco leaves; when the temperature or humidity in the drying room is too high, the dehumidification fan is started and the fresh air door 4 is opened, so that the low-humidity fresh air from the outside enters the drying room through the output end of the condenser 6; and the high-humidity hot air output by the first dehumidification fan 7 absorbs the heat energy in the external evaporator 2 and then enters the heat circulation through the second outlet 15, realizing the dehumidification, moisture removal and output of high-temperature hot air of the high-humidity hot air.

[0045] Those skilled in the art can understand that the temperature and humidity of the high-temperature hot air, the high-humidity hot air and the medium-humidity hot air in the present application are relative concepts, not absolute concepts. For example, the medium-humidity hot air means that the humidity is reduced compared with the high-humidity hot air, and the high-humidity hot air has higher humidity compared with the high-temperature hot air.

[0046] Specifically, the heat exchange unit comprises:

[0047] The air inlet 13 is used to provide an access channel for the high-humidity hot air in the drying room;

[0048] a core heat exchanger 8, which is partially arranged above the air inlet 13, and which absorbs heat from the high-humidity hot air entering the air inlet 13 to reduce the temperature of the high-humidity hot air to the dew point temperature;

[0049] a support 9, which is arranged below the core heat exchanger 8 and fixedly connected with the core heat exchanger 8, and which fixes the spatial position of the core heat exchanger 8.

[0050] It can be understood by those skilled in the art that the relative positions of the air inlet 13, the core heat exchanger 8 and the support 9 are preferred embodiments of the present application, and those skilled in the art can make adaptive adjustments to the height of the support 9 and the size of the air inlet 13 according to the actual environment of the drying room and the amount of tobacco to be dried, as long as the function of absorbing high-humidity hot air of the heat exchange unit is met.

[0051] Specifically, the dehumidification unit comprises:

[0052] a first dehumidification fan 7, which is partially arranged above the core heat exchanger 8 away from the air inlet 13, and which transports the high-humidity hot air output by the core heat exchanger 8 to the evaporation assembly;

[0053] a second dehumidification fan (not shown in the figure), which is partially arranged above the core heat exchanger 8 away from the air inlet 13, and which circulates the first-stage dehumidification hot air output by the evaporation assembly to the built-in evaporator 10;

[0054] the evaporation assembly, which is partially arranged above the dehumidification fan, and which absorbs heat in the drying room by evaporation of low-temperature and low-pressure refrigerant to evaporatively dehumidify the high-humidity hot air output by the dehumidification fan to output first-stage dehumidification hot air;

[0055] a compressor 11, which is arranged below the evaporation assembly, and which compresses the low-temperature and low-pressure refrigerant to output high-temperature and high-pressure refrigerant gas to a corresponding condensing position;

[0056] the built-in evaporator 10, which is connected with the dehumidification fan, and which evaporates liquid water in the first-stage dehumidification hot air to output second-stage dehumidification hot air.

[0057] In the implementation, the present application realizes effective removal of water in high-humidity hot air by arranging the dehumidification fan, the evaporation assembly and the built-in evaporator 10, overcomes the problem that the quality of tobacco is affected due to excessively high humidity in the environment of flue-cured tobacco, and enables the circulating hot air to maintain appropriate humidity, thereby improving the quality and efficiency of tobacco drying.

[0058] Specifically, the evaporation assembly comprises:

[0059] An evaporative fan 1 is used to transfer heat from the outside to the low-temperature and low-pressure refrigerant.

[0060] An external evaporator 2 is connected to the evaporative fan 1 and used to absorb heat from the outside through the low-temperature and low-pressure refrigerant to evaporatively dehumidify the high-humidity and high-temperature air output by the dehumidification fan and output the primary dehumidified air.

[0061] Specifically, the humidity of the primary dehumidified air is greater than that of the secondary dehumidified air.

[0062] Specifically, the fresh air input unit comprises:

[0063] A fresh air door 4 is arranged above the condenser 6 and used to input low-humidity fresh air to the output end of the condenser 6.

[0064] A humidity sensor 3 is connected to the fresh air door 4 and used to detect the humidity of the air outside the fresh air door 4.

[0065] In the implementation, the low-humidity fresh air in the outside environment is introduced to control the humidity and temperature in the drying room when the temperature or humidity in the drying room is too high, so that the temperature and humidity of the tobacco drying environment are kept in a suitable range, and the quality stability of the tobacco drying is improved.

[0066] Specifically, the width of the internal evaporator 10 in the horizontal direction is less than the width of the external evaporator 2 in the horizontal direction.

[0067] Specifically, the dehumidification unit further comprises:

[0068] A first inlet 12 is arranged above the core heat exchanger 8 and used to absorb the high-humidity and high-temperature air output by the core heat exchanger 8.

[0069] A first outlet 17 is partially arranged above the first inlet 12 and used to deliver the high-humidity and high-temperature air to the external evaporator 2.

[0070] A second inlet (not shown in the figure) is arranged below the first outlet 17 and used to absorb the medium-humidity and high-temperature air discharged by the external evaporator 2.

[0071] A second outlet 15 is arranged below the second outlet 15 and used to deliver the medium-humidity and high-temperature air to the internal evaporator 10.

[0072] The relative positions of the first inlet 12, the first outlet 17, the second inlet and the second outlet 15 are set as the preferred embodiment of the utility model, and the skilled in the art can make adaptive adjustment to the size of the first inlet 12, the first outlet 17, the second inlet and the second outlet 15 under the premise of realizing the dehumidification cycle of the high-wet hot air output by the core heat exchanger 8 according to the actual baking needs.

[0073] Specifically, the upper portion of the built-in evaporator 10 is provided with a built-in expansion valve 14 for controlling the entering flow of the medium-wet hot air.

[0074] Specifically, the lower portion of the built-in evaporator 2 is provided with an external expansion valve 16 for controlling the flow of the low-temperature and low-pressure refrigerant into the built-in evaporator 2.

[0075] Please refer to Figure 2 The specific working process of the closed-loop tobacco baking machine with active dehumidification function is as follows: when there is more high-wet hot air in the drying room, the high-wet hot air in the drying room is absorbed and the heat in the high-wet hot air is exchanged and reused through the heat exchange unit arranged in the heat circulation mechanism, so that the high-temperature hot air is output through the circulating fan 5; when the high-wet hot air enters the core heat exchanger 8 in the heat exchange unit, the first dehumidification fan 7 delivers the high-wet hot air to the external evaporator 2 to realize the preliminary dehumidification of the high-wet hot air and output the medium-wet hot air through the second dehumidification fan, the medium-wet hot air enters the built-in evaporator 10 through the second outlet 15, the built-in evaporator 10 performs evaporation and dehumidification operation on the medium-wet hot air again, the gas output by the built-in evaporator 10 exchanges heat with the high-wet hot air input into the core heat exchanger 8, so that the temperature of the gas output by the built-in evaporator 10 increases to output high-temperature hot air, and the low-temperature and low-pressure refrigerant evaporated by the external evaporator 2 becomes high-temperature and low-pressure refrigerant gas back to the compressor 11, the compressor 11 compresses the high-temperature and low-pressure refrigerant gas and generates high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant diffuses into the condenser 6 to perform condensation process so that the heat absorbed by the refrigerant is dissipated through the condenser 6; and the tobacco needs to maintain a certain humidity and temperature during drying, when the temperature or humidity in the drying room is too high, the dehumidification fan and the fresh air door 4 act synchronously to introduce low-humidity fresh air into the drying room, so that the drying temperature and humidity of the tobacco are within the controllable range.

[0076] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A closed-loop cigarette roaster with active moisture removal function, characterized in that, The heat circulation mechanism comprises a heat exchange unit for absorbing heat from the high-humidity hot air in the drying room to cool the high-humidity hot air, a dehumidification unit connected to the heat exchange unit for dehumidifying the high-humidity hot air, and a condenser partially arranged above the dehumidification unit for condensing heat in the drying room and discharging the drying room to output high-temperature hot air. The drying mechanism is arranged above the heat circulation mechanism and is used for drying tobacco leaves, comprising a circulating fan arranged above the condenser for discharging the high-temperature hot air into the drying room, and a fresh air input unit arranged above the condenser for inputting fresh air with a humidity range into the drying room. The heat exchange unit comprises:

2. The closed-loop cigarette roaster with active moisture removal function according to claim 1, characterized in that, an air inlet for providing an entry channel for the high-humidity hot air in the drying room; a core heat exchanger partially arranged above the air inlet, which absorbs heat from the high-humidity hot air entering the air inlet to reduce the temperature of the high-humidity hot air to the dew point temperature; a bracket arranged below the core heat exchanger and fixedly connected to the core heat exchanger for fixing the spatial position of the core heat exchanger. The dehumidification unit comprises:

3. The closed-loop cigarette roaster with active moisture removal function according to claim 2, characterized in that, a first dehumidification fan partially arranged above the core heat exchanger away from the air inlet for conveying the high-humidity hot air output by the core heat exchanger to an evaporation assembly; a second dehumidification fan partially arranged above the core heat exchanger away from the air inlet for circulating the primary dehumidification hot air output by the evaporation assembly to an internal evaporator; The evaporation assembly is partially arranged above the dehumidification fan, which absorbs heat in the drying room by evaporation of low-temperature and low-pressure refrigerant to evaporatively dehumidify the high-humidity hot air output by the dehumidification fan to output the primary dehumidification hot air; a compressor arranged below the evaporation assembly for compressing the low-temperature and low-pressure refrigerant to output high-temperature and high-pressure refrigerant gas to a corresponding condensing position; The internal evaporator is connected to the dehumidification fan, which evaporates liquid water in the primary dehumidification hot air to output the secondary dehumidification hot air. The evaporation assembly comprises:

4. The closed loop cigarette roaster with active moisture removal function according to claim 3, characterized in that, an evaporation fan for transferring heat from the outside to the low-temperature and low-pressure refrigerant; an external evaporator connected to the evaporation fan for absorbing heat from the outside by the low-temperature and low-pressure refrigerant to evaporatively dehumidify the high-humidity hot air output by the dehumidification fan to output the primary dehumidification hot air. The humidity of the primary dehumidification hot air is greater than the humidity of the secondary dehumidification hot air.

5. The closed loop cigarette roaster with active moisture removal function according to claim 3, wherein, The fresh air input unit comprises:

6. The closed loop cigarette roaster with active moisture removal function according to claim 5, wherein, a fresh air door arranged above the condenser for inputting low-humidity fresh air to the output end of the condenser; a humidity sensor connected to the fresh air door for detecting the air humidity outside the fresh air door. The width of the internal evaporator in the horizontal direction is less than the width of the external evaporator in the horizontal direction.

7. The closed loop cigarette roaster with active moisture removal function according to claim 3, wherein, The dehumidification unit further comprises:

8. The closed loop tobacco smoking machine with active moisture removal function according to claim 7, wherein, ​ A first inlet is arranged above the core heat exchanger to absorb high-humidity hot air output by the core heat exchanger; A first outlet is arranged above the first inlet to deliver the high-humidity hot air to the external evaporator; A second inlet is arranged below the first outlet to absorb medium-humidity hot air discharged by the external evaporator; A second outlet is arranged below the second outlet to deliver the medium-humidity hot air to the internal evaporator.

9. The closed loop tobacco smoking machine with active moisture removal function according to claim 8, wherein, An internal expansion valve is arranged above the internal evaporator to control the flow rate of the medium-humidity hot air.

10. The closed-loop cigarette roaster with active moisture removal function according to claim 9, characterized in that, An external expansion valve is arranged below the external evaporator to control the flow rate of the low-temperature and low-pressure refrigerant into the external evaporator.

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