CN117481379A - Air source heat pump tobacco flue-curing house - Google Patents

Abstract

The invention belongs to the technical field of flue-cured tobacco drying equipment, and discloses an air source heat pump flue-cured tobacco house which comprises a flue-cured tobacco house body, a tobacco hanging mechanism and a heat pump unit; the tobacco hanging mechanism with the adjustable spacing of the tobacco rod frame is convenient for loading and unloading the tobacco rod, is simple to operate, is safe and efficient, enables the tobacco rod frame to be arranged at intervals with the inner side wall of the wallboard of the tobacco flue-curing chamber, is convenient for tobacco leaves at two ends of the tobacco rod to be fully contacted with circulating air flow to finish drying, generates circulating heating air flow which flows back and forth in the circulating air channel through the heat pump unit, dehumidifies through the dehumidification mechanism, and the dehumidification process is carried out in the heating chamber, so that direct discharge of heating air flow in the dehumidification process is avoided, heat loss caused by discharge of the circulating heating air flow can be effectively reduced, heat utilization rate is improved, drying efficiency of the tobacco flue-curing chamber is improved, distribution uniformity of the heating air flow in the tobacco flue-curing chamber is effectively improved, and drying effect on tobacco leaves can be effectively improved through arranging the air deflector in the tobacco flue-curing chamber.

Description

An air source heat pump tobacco room

Technical field

The invention belongs to the technical field of flue-cured tobacco drying equipment, and specifically relates to an air source heat pump tobacco-curing room.

Background technique

Air source heat pump is an energy-saving device that uses high-level energy to flow heat from low-level heat source air to high-level heat source. It can convert low-level heat energy that cannot be directly used into usable high-level heat energy to save part of high-level energy (such as coal, gas, oil, electricity, etc.).

At present, air source heat pump technology has been widely used in tobacco curing rooms. For example, the high-temperature heat pump type tobacco curing room disclosed in the Chinese patent No. CN204047983U is divided into a tobacco curing chamber and a heat source room through partitions, which are opened on the upper and lower sides of the partition. There is an upper return port and a lower return port. A flue-cured tobacco hanging rod is installed in the flue-curing room. A dehumidification fan is installed in the flue-curing room. The air outlet of the dehumidification fan is equipped with a self-hanging louver. It has a simple structure, is environmentally friendly and safe, and is relatively energy efficient. relatively high.

However, the above-mentioned curing houses and existing curing houses still have the following problems: First, the tobacco rod rack of the curing chamber is fixed on the inner wall of the curing chamber. Such fixed tobacco rod racks need to be loaded and unloaded in the middle and upper parts before and after drying. Layers of tobacco rods need to be built to assist with the construction of ladders. Not only is the operation cumbersome and the operation efficiency is low, but it also poses a major safety hazard. At the same time, the way the tobacco rod racks are installed closely with the inner wall of the curing room will cause the ends of the tobacco rods to During the drying process, the flue-cured tobacco leaves are pressed tightly against the inner wall of the curing room, resulting in insufficient contact between this part of the flue-cured tobacco leaves and the circulating air flow, and the drying effect is poor; second, the dehumidification fan is used to directly discharge the inside of the curing room. The dehumidification of circulating gas is achieved by using high-humidity gas and replenishing external air. However, this method will bring out a large amount of heat during the gas discharge process, resulting in serious heat loss and affecting the drying efficiency and energy utilization of the tobacco room. Low.

In the existing technology, there are also curing rooms with a dehumidification mechanism installed inside the curing room. For example, the Chinese patent publication number CN215909542U discloses an air source heat pump tobacco curing room. It is equipped with a dehumidification module in the circulating dehumidification air duct. Through the dehumidification module Cooling and dehumidifying the air flow in the cycle can reduce gas discharge and reduce heat loss. However, the air inlet of the dehumidification module of the above-mentioned baking room is located in the middle of the circulating dehumidification air duct and the air inlet direction is upward. Due to the suction effect of the circulating fan, the air flow in the circulating dehumidification air duct has a large upward trend, making it difficult for the air flow that needs to be dehumidified to enter. Dehumidification module, the dehumidification module has a small dehumidification processing capacity of the air flow, and the dehumidification efficiency is low, which affects the quality of tobacco leaf drying.

Contents of the invention

In order to overcome the problems existing in the background technology, the present invention proposes an air source heat pump tobacco curing room, which facilitates the loading and unloading of tobacco rods by providing a tobacco hanging mechanism with adjustable spacing between tobacco rod racks, is simple to operate, safe and efficient, and makes the tobacco rod more convenient. The rack is spaced apart from the inner wall of the wall panel of the smoking chamber to facilitate full contact between the tobacco leaves at both ends of the tobacco rod and the circulating airflow to complete drying. The heat pump unit is set up to generate a circulating heating airflow that circulates back and forth in the circulating air duct, and through the dehumidification mechanism Dehumidification is carried out in the heating chamber, which avoids the direct discharge of the heated air flow during the dehumidification process, which can effectively reduce the heat loss caused by the discharge of circulating heated air flow, improve the heat utilization rate, and improve the drying efficiency of the tobacco room. An air guide plate is installed in the flue-cured tobacco room to evenly transport the circulating heated airflow to the flue-cured tobacco room, which effectively improves the uniformity of the distribution of heated airflow in the flue-cured tobacco room, improves the uniformity of the temperature field in the flue-cured tobacco room, and can effectively improve the drying effect of tobacco leaves.

In order to solve the above problems, the present invention is implemented through the following technical solutions:

An air source heat pump smoking room, including:

The curing room body includes a bottom plate and a heating chamber and a tobacco-curing chamber installed on the bottom plate and separated by partitions. The upper and lower ends of the partition plate are respectively provided with upper and lower circulation air outlets to connect the heating chamber and the tobacco-curing chamber;

A cigarette hanging mechanism is used to place a tobacco rod with tobacco leaves hanging on it. The cigarette hanging mechanism includes a first tobacco rod rack arranged on both sides of the tobacco-curing chamber from bottom to top through a bracket, a first lifting mechanism, and a second lifting mechanism. , the second tobacco rod rack, the third tobacco rod rack, the distance between the first tobacco rod rack, the second tobacco rod rack and the third tobacco rod rack is adjustable, and the first tobacco rod rack, the second tobacco rod rack and the third tobacco rod rack The three tobacco rod racks are spaced apart from the inner wall of the wall panel of the smoking chamber;

A heat pump unit is used to provide a heat source for the tobacco-curing chamber. The heat pump unit includes a heat pump host, a circulating fan, a condenser, and a dehumidification mechanism for dehumidification. The heat pump host is arranged on the bottom plate at a position outside the heating chamber. The heat pump The host is connected to the condenser through a heat exchange pipe. The condenser and the circulating fan are installed horizontally in the heating chamber along the direction of the circulating air flow to form a circulating air flow in the heating chamber and the tobacco chamber. The dehumidification mechanism is symmetrically arranged at the bottom of the heating chamber. On the left and right sides, the inlet and outlet of the dehumidification mechanism are connected to the flue-curing chamber and the heating chamber respectively. The heating chamber is provided with an exhaust damper at a position between the condenser and the dehumidification mechanism on the wall plate on one side facing the heat pump host.

Preferably, an air guide plate with the same height as the bottom surface of the upper circulation air outlet is installed horizontally in the tobacco-curing chamber, and the front end of the air guide plate is connected to the partition board so that the air guide plate and the side wall of the tobacco-curing chamber form an air guide channel at the top of the tobacco-curing chamber. The openings at the front and rear ends of the air guide channel are connected to the heating chamber and the flue-curing chamber respectively.

Preferably, the air guide plate is also provided with at least two sequentially increasing downwind openings along the flow direction of the circulating air flow.

Preferably, the dehumidification mechanism includes an air induction duct installed at the bottom of the heating chamber, a windshield casing, and a heat exchanger, a moisture exhaust fan, and an evaporator enclosed in the windshield casing. The air induction duct is installed in the lower circulation The air outlet is connected to the flue-curing chamber. The windshield casing is a box structure with a semi-circular arc cross section, and an opening is provided on one side of the windshield casing close to the air induction duct. The heat exchanger is installed obliquely on the windshield casing. Inside the body, the heat exchanger has an air inlet duct and an air outlet duct arranged vertically across each other. The air inlet duct is connected to the air induction duct, and the air outlet duct faces the opening and is flush with the opening. The heat exchanger The outer end of the air outlet of the device is equipped with a dehumidification fan with a blowing direction perpendicular to the air outlet duct. The heat exchanger and the dehumidification fan are separated by an evaporator installed vertically on the bottom plate. The inlet of the evaporator , the air outlet faces the direction of the moisture exhaust fan and the heat exchanger air outlet respectively, so that the air induction duct, heat exchanger, moisture exhaust fan, and evaporator form a one-way dehumidification air duct in the windshield shell.

Preferably, the outer wall of the air induction duct is installed with a fresh air damper that leads in one direction toward the air induction duct. A fresh air fan is also installed at the outer end of the fresh air damper, and the two fresh air fans installed on the two fresh air dampers penetrate the heating system respectively. Wall panels are installed on the left and right sides of the room.

Preferably, the fresh air damper is a self-hanging louver type one-way damper, and the opening direction of the damper is toward the air induction duct.

Preferably, the first lifting mechanism and the second lifting mechanism are screw slide linear modules, the second tobacco rod rack and the third tobacco rod rack are respectively installed on the slide blocks of the two linear modules, and the third The lower limit position of the slider of the second lifting mechanism is higher than the lower limit position of the slider of the first lifting mechanism. A heat-insulating shell is provided outside the drive motor of the first lifting mechanism and the second lifting mechanism. The heat-insulating shell is installed on Wall panels on both sides of the smoking room.

Preferably, the exhaust damper of the heating chamber is a self-vertical louver type one-way damper, with the opening direction of the damper facing the heat pump host, and the exhaust damper is in a normally closed state during the heating period.

Preferably, a guide plate is installed at the upper corner of the front side of the heating chamber, and the cross section of the guide plate is an arc-shaped structure.

Preferably, a smoke installation door is also installed on the rear side wall of the smoking chamber of the main body of the curing chamber.

The beneficial effects of the present invention are:

1) By setting up a hanging mechanism with adjustable spacing between the tobacco rod racks for placing tobacco rods, it is easy to load and unload the tobacco rods on the middle and upper two levels of tobacco rod racks. The tobacco rod loading and unloading operation can be completed without the need to build a ladder to assist, and the operation is simple , high operating efficiency, eliminating potential safety hazards when using ladders;

2) By arranging the tobacco rod rack and the inner wall of the wall panel of the tobacco curing chamber at intervals, the problem of the tobacco leaves located at both ends of the tobacco rod being pressed against the inner wall of the wall panel of the tobacco curing chamber during the drying process is effectively avoided. It facilitates full contact between the tobacco leaves at both ends of the tobacco rod and the circulating air flow, which can effectively improve the drying effect of the tobacco leaves;

3) The heat pump unit is set up to generate a circulating heated air flow that circulates back and forth in the circulating air duct to dry the tobacco leaves, and a dehumidification mechanism is used to dehumidify the circulating heated air flow in the dehumidifying air duct. The dehumidification process is carried out in the heating chamber, avoiding the need for traditional baking. The dehumidification method of the room will bring out a lot of heat, which effectively reduces the direct discharge of the heated air flow during the dehumidification process. It can effectively reduce the heat loss caused by the discharge of circulating heated air flow, improve the heat utilization rate, and improve the drying of the tobacco room. efficiency;

4) By installing an air guide plate in the flue-curing chamber and forming an air guide channel with the flue-cured tobacco room, the circulating heated air flow can be evenly transported to the flue-cured tobacco room through the air guide channel, which effectively improves the uniformity of the distribution of the heated air flow in the flue-cured tobacco room and improves the quality of the flue-cured tobacco. The uniformity of the indoor temperature field can effectively improve the drying effect of tobacco leaves.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic diagram of the exploded structure of the tobacco curing chamber of the curing chamber body of the present invention;

Figure 3 is an enlarged view of part A of Figure 2;

Figure 4 is a schematic diagram of the structure and installation position of the dehumidification mechanism of the present invention;

Figure 5 is a schematic diagram of the installation position of the air induction duct of the dehumidification mechanism of the present invention.

Explanation of reference signs: 1-curing room body, 11-bottom plate, 12-partition board, 13-heating chamber, 14-curing tobacco chamber, 121-upper circulation air outlet, 122-lower circulation air outlet, 131-exhaust damper, 15- smoke door;

2-cigarette hanging mechanism, 21-bracket, 22-first lifting mechanism, 23-second lifting mechanism, 24-first tobacco rod rack, 25-second tobacco rod rack, 26-third tobacco rod rack, 27- Insulated housing;

3-heat pump unit, 31-heat pump host, 32-circulation fan, 33-condenser, 34-dehumidification mechanism;

341-Induced air duct, 342-Wind shielding shell, 343-Heat exchanger, 344-Dehumidification fan, 345-Evaporator, 346-Fresh air damper, 347-Fresh air fan, 3431-Air inlet duct, 3432 Air outlet wind channel;

4-air guide plate, 41-lower air outlet; 5-air guide channel; 6-air deflector plate.

Detailed ways

In order to make the purpose, technical solution, achievement of purpose and effect of the present application clear and easy to understand, the specific implementation manner of the present application will be further described in detail below with reference to the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application. Similarly, the following examples are only some of the embodiments of the present application and not all of the embodiments. Those of ordinary skill in the art will not make creative efforts before All other embodiments obtained below belong to the scope of protection of this application.

It should be noted that in the description of this application, if there are no clear provisions or limitations, the terms "installation", "connection", "connection", "connection", etc. should be understood in a broad sense, that is, they can be fixed connections or fixed connections. It can be a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium.

In this application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axis", "Radial", "Peripheral" The orientation or positional relationship indicated by "to" and so on is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation. Specific orientation construction and operation, therefore, should not be construed as limitations on this application.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

In this application, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

In the present invention, as shown in Figures 1-5, an air source heat pump tobacco curing room includes:

The main body of the curing room 1 includes a bottom plate 11 and a heating chamber 13 and a flue-curing chamber 14 installed on the bottom plate 11 and separated by a partition 12. The upper and lower ends of the partition 12 are respectively provided with an upper circulation air outlet 121 and a lower circulation air outlet 122. The heating chamber 13 is connected to the flue-cured tobacco chamber 14, wherein the flue-cured tobacco chamber 14 is used to place tobacco leaves through the tobacco rod, the heating chamber 13 is used to generate heated airflow and deliver the heated airflow to the flue-cured tobacco chamber 14, and the heating chamber 13 and the flue-cured tobacco chamber 14 are connected to form a circulating air duct that facilitates the circulation movement of the heated airflow, so that the drying operation of the tobacco leaves in the tobacco chamber 14 is realized through the circulation movement of the heated airflow between the heating chamber 13 and the tobacco chamber 14; optionally, the A smoke-loading door 15 is also installed on the rear side wall of the tobacco-curing chamber 14 of the curing chamber body 1, so that workers can load and unload the tobacco rods in the tobacco-curing chamber 14 through the tobacco loading door 15.

The cigarette hanging mechanism 2 is used to place tobacco rods with tobacco leaves hung on them. The cigarette hanging mechanism 2 includes a bracket 21, a first lifting mechanism 22, and a second lifting mechanism 23 respectively arranged on both sides of the tobacco chamber 14 from bottom to top. The first tobacco rod rack 24, the second tobacco rod rack 25, and the third tobacco rod rack 26 are on the side. The distance between the first tobacco rod rack 24, the second tobacco rod rack 25, and the third tobacco rod rack 26 is adjustable. And the first tobacco rod rack 24, the second tobacco rod rack 25, and the third tobacco rod rack 26 are spaced apart from the inner wall of the wall panel of the tobacco chamber 14. Therefore, the second tobacco rod rack 25 and the third tobacco rod rack 26 can be lowered to a position slightly higher than the first tobacco rod rack 24 through the first lifting mechanism 22 and the second lifting mechanism 23 respectively, thereby facilitating the drying process before and after drying. When loading and unloading the tobacco rods on the middle and upper two levels of tobacco rod racks, the operators only need to stand on the bottom plate 11 to load and unload the tobacco rods. They can complete the loading and unloading operation without building a ladder to assist. The operation is simple and the operation efficiency is high, eliminating the trouble when using ladders. Potential safety hazards; by using the bracket 21, the first lifting mechanism 22, and the second lifting mechanism 23 to install the first tobacco rod rack 24, the second tobacco rod rack 25, and the third tobacco rod rack 26 respectively, so that the first tobacco rod rack 24. There is a gap between the second tobacco rod rack 25 and the third tobacco rod rack 26 and the inner wall of the wall panel of the tobacco chamber 14, which effectively prevents the tobacco leaves located at both ends of the tobacco rod from being pressed tightly together during the drying process. The problem on the inner wall of the wall panel of the flue-curing chamber 14 facilitates full contact between the tobacco leaves at both ends of the tobacco rod and the circulating air flow, which can effectively improve the drying effect of the tobacco leaves.

Optionally, the first lifting mechanism 22 and the second lifting mechanism 23 are screw slider linear modules, and the second tobacco rod rack 25 and the third tobacco rod rack 26 are respectively installed on the two linear modules. on the slider, and the lower limit position of the slider of the second lifting mechanism 23 is higher than the lower limit position of the slider of the first lifting mechanism 22, so as to avoid the second tobacco rod rack 25 and the third tobacco rod rack 26 from lowering the height. Interference occurs when placing the tobacco rod. Specifically, when placing the tobacco rod, the tobacco rod can be placed on the second tobacco rod rack 25 only after the third tobacco rod rack 26 has been placed and lifted and reset; the first lifting mechanism 22 and the second A heat-insulating housing 27 is provided outside the driving motor of the lifting mechanism 23. The heat-insulating housing 27 is installed on the wall panels on both sides of the flue-curing chamber 14, so that the driving motors of the two sets of linear modules can be formed by the heat-insulating housing 27. Thermal insulation protection can prevent the heated air flow from causing damage to the driving motor during tobacco leaf drying, so as to ensure that the second tobacco rod rack 25 and the third tobacco rod rack 26 can move up and down normally. Specifically, the thermal insulation shell 27 can be selected from thermal insulation color steel sandwich panels, vacuum insulation panels, XPS extruded insulation panels, aluminum foil insulation coils and other insulation panels. The first lifting mechanism 22 For the second lifting mechanism 23, linear motion mechanisms such as guide rail slider modules, synchronous belt linear modules, and chain elevators can also be selected.

The heat pump unit 3 is used to provide a heat source for the tobacco chamber 14. The heat pump unit 3 includes a heat pump host 31, a circulating fan 32, a condenser 33, and a dehumidification mechanism 34 for dehumidification. The heat pump host 31 is provided with At a position on the bottom plate 11 located outside the heating chamber 13, the heat pump host 31 is connected to the condenser 33 through a heat exchange pipe. The condenser 33 and the circulating fan 32 are installed horizontally in the heating chamber 13 in sequence along the direction of the circulating air flow. Thereby, under the action of the circulating fan 32, a circulating air flow can be formed in the heating chamber 13 and the tobacco chamber 14. As shown by the arrow in Figure 1, the circulating air flow reciprocates in the circulating air duct between the heating chamber 13 and the tobacco chamber 14. , to realize the drying operation of tobacco leaves in the flue-cured tobacco chamber 14. The dehumidification mechanism 34 is symmetrically arranged on the left and right sides of the bottom of the heating chamber 13. The inlet and outlet of the dehumidification mechanism 34 are respectively connected with the flue-cured tobacco chamber 14 and the heating chamber 13. Connected.

Specifically, in the heating stage of the early stage of tobacco leaf drying, under the heating effect of the heat pump host 31 and the condenser 33, the normal temperature gas in the circulating air duct undergoes heat exchange when passing through the condenser 33, forming a high-temperature air flow, which is pushed by the circulating fan 32. Under the action, the high-temperature airflow is sent from the heating chamber 13 to the tobacco-curing chamber 14 through the upper circulation air outlet 121. The high-temperature airflow produces a drying effect on the tobacco leaves. Then, under the continuous air supply of the circulating fan 32, it first enters the high-temperature tobacco-curing chamber 14. The airflow becomes a medium-temperature and high-humidity airflow, and then returns from the flue-curing chamber 14 to the heating chamber 13 through the lower circulation air outlet 122 and is heated by the condenser 33. The heated airflow flows back and forth in this way to form a circulating heating airflow; during this period, the dehumidification mechanism 34 The dehumidification fan 344 and the fresh air fan 347 are in a closed state, the evaporator 345 is operating normally, and a small amount of medium-temperature and high-humidity heated airflow passes through the dehumidification mechanism 34 normally. Without affecting the drying efficiency, when this part of the airflow passes through the evaporator 345 Heat exchange is carried out to produce dehumidification, which changes the air flow into a medium temperature and low humidity air flow and mixes it with the medium temperature and high humidity air flow in the circulation, which can slow down the rising speed of the humidity of the circulating air flow; when the humidity of the circulating air flow reaches a certain value, the dehumidification mechanism 34 is started The dehumidification fan 344 starts the dehumidification operation.

An exhaust damper 131 is provided on the side wall of the heating chamber 13 facing the heat pump host 31 at a position between the condenser 33 and the dehumidification mechanism 34, so that the exhaust damper 131 can connect the baking room body 1 to the outside world. connected to balance the air pressure inside and outside the baking room; optionally, the exhaust damper 131 of the heating chamber 13 is a self-vertical louver type one-way damper, with the opening direction of the damper facing the heat pump host 31, and the exhaust damper 131 is in the position during heating. In the normally closed state, the self-vertical louver type one-way damper is used and is only opened after the dehumidification mechanism 34 introduces new air to increase the air pressure in the curing room, thereby ensuring that the circulating air flows along the heating chamber 13 and The circulating flow in the flue-curing chamber 14 avoids the loss of heating airflow and can effectively reduce heat loss.

In this embodiment, the air flow heated after passing through the condenser 33 is sent from the heating chamber 13 into the tobacco-curing chamber 14 through the pushing effect of the circulating fan 32 to form a circulating heating air flow. The circulating heating air flow flows back and forth to dry the tobacco leaves in the tobacco-curing chamber 14. , and by setting dehumidification mechanisms 34 on the left and right sides of the bottom of the heating chamber 13, the dehumidification mechanism 34 dehumidifies the circulating heating air flow when the humidity is high, which can effectively prevent the humidity of the circulating heating air flow from rising too quickly and dehumidify the circulating heating air flow. The process is carried out in the heating chamber 13, which avoids the problem of using a dehumidification fan to directly discharge the internal high-humidity gas and supplement the external air for dehumidification in the traditional baking room, which will bring out a large amount of heat, and effectively reduces the circulating heating air flow during the dehumidification process. The direct discharge can effectively reduce the heat loss caused by the discharge of circulating heating air flow, improve the heat utilization rate, and improve the drying efficiency of the tobacco room.

In one embodiment, an air guide plate 4 with the same height as the bottom surface of the upper circulation air outlet 121 is installed horizontally in the tobacco-curing chamber 14. The front end of the air guide plate 4 is connected to the partition 12, so that the air guide plate 4 is connected to the tobacco-curing chamber. The side wall of 14 forms an air guide channel 5 at the top of the tobacco chamber 14. The front and rear openings of the air guide channel 5 are connected to the heating chamber 13 and the tobacco chamber 14 respectively, so that the circulation fan 32 can be pushed into the tobacco chamber 14 through the air guide plate 4. The circulating heated airflow is directed to the rear end of the tobacco chamber 14, so that the circulating heated airflow can fully reach the upper corner of the rear end of the tobacco chamber 14; optionally, at least two holes are provided on the air guide plate 4 along the direction of the circulating air flow. The lower air openings 41 are sequentially enlarged, so as to supplement the heating air flow for the front and middle sections of the tobacco chamber 14 through the lower air openings 41, and by adopting the method of sequentially increasing the lower air openings 41 along the direction of the circulating air flow to make up for the heating air flow in the direction of the circulating air flow. The conditions in the air guide channel 5 decrease as the distance from the circulation fan 32 becomes longer, so as to ensure the uniformity of the heating air flow in the tobacco chamber 14. In this embodiment, the air guide plate 4 is installed in the flue-curing chamber 14 to form the air guide channel 5, so that the circulating heated air flow can fully reach the upper corner of the rear end of the flue-curing chamber 14, thus avoiding the airflow at the upper corner of the rear end of the flue-curing chamber 14. The problem of low temperature and poor drying effect on tobacco leaves is effectively improved by improving the uniformity of the distribution of heated airflow in the tobacco chamber 14, effectively improving the uniformity of the temperature field in the tobacco chamber 14, and effectively improving the drying effect of the tobacco leaves. Dry effect.

In this embodiment, the dehumidification mechanism 34 includes an air induction duct 341 installed at the bottom of the heating chamber 13 , a windshield casing 342 , a heat exchanger 343 and a moisture exhaust fan 344 enclosed in the windshield casing 342 , evaporator 345, the air induction pipe 341 is installed at the lower circulation air outlet 122 and communicates with the flue-curing chamber 14, the windshield casing 342 is a box structure with a semi-circular arc shape in cross section, and the windshield casing 342 is close to An opening is provided on one side of the air induction pipe 341. The heat exchanger 343 is installed obliquely in the windshield casing 342. The heat exchanger 343 has an air inlet duct 3431 and an air outlet duct 3432 arranged vertically. The air inlet duct 3431 is connected with the air induction duct 341, the air outlet duct 3432 faces the opening and is flush with the opening, and the outer end of the air outlet of the heat exchanger 343 is installed with a blowing direction perpendicular to the The moisture discharge fan 344 of the air outlet duct 3432 is separated from the heat exchanger 343 and the moisture discharge fan 344 by an evaporator 345 installed vertically on the bottom plate 11. The inlet and outlet of the evaporator 345 face the exhaust respectively. The direction of the air outlet duct 3432 of the wet fan 344 and the heat exchanger 343 allows the air induction duct 341, the heat exchanger 343, the moisture exhaust fan 344, and the evaporator 345 to form a one-way dehumidification air duct in the windshield casing 342. , so that part of the medium-temperature and high-humidity airflow from the flue-curing chamber 14 back to the heating chamber 13 through the lower circulation air outlet 122 can enter the dehumidification air duct for dehumidification operations. After the medium-temperature and high-humidity airflow passes through the evaporator 345 to exchange heat and cool down, the water vapor in the airflow The separation of condensation and airflow realizes dehumidification, so that the medium-temperature and high-humidity airflow is converted into a medium-temperature and low-humidity airflow and enters the heating chamber 13. It is then mixed with the remaining medium-temperature and high-humidity airflow and heated by the condenser 33 and then converted into a high-temperature airflow and enters the circulating air duct. The wet air flow has good dehumidification effect and high dehumidification efficiency, which can effectively ensure the quality of tobacco leaf drying; by symmetrically disposing the two dehumidification mechanisms 34 on the left and right sides of the bottom of the heating chamber 13, the mixture of the dehumidified air flow and the circulating air flow can be effectively improved. Uniformity to improve the temperature uniformity of the circulating heating airflow entering the tobacco chamber 14.

Specifically, the heat pump host 31 is connected to the condenser 33 through a heat exchange pipe, the condenser 33 is connected to the evaporator 345 through a heat exchange pipe, and the evaporator 345 is connected to the heat pump host 31 through a heat exchange pipe. In the heat pump unit 3 , after the heat pump host 31 is started, the air flow in the circulating air duct is heated through the condenser 33, and the air flow in the dehumidification air duct is dehumidified through the evaporator 345; specifically, it can be extended into the windshield casing 342 by opening an opening on the bottom plate 11 A groove or a pipe extending into the windshield casing 342 is installed on the bottom plate 11 to discharge the condensed water generated by the evaporator 345.

In this embodiment, a windshield casing 342 with a semicircular arc-shaped box structure is used, and at the same time, the moisture exhaust fan 344 is arranged at the air outlet of the heat exchanger 343 in such a way that the blowing direction is perpendicular to the air outlet duct 3432. The outer end allows the medium-temperature and high-humidity airflow to be dehumidified to flow along a semicircular arc-shaped path in the dehumidification air duct under the suction action of the dehumidification fan 344, thereby avoiding the generation of airflow at the intersection of various components or at the corners of the windshield casing 342. Accumulation can effectively increase the flow speed of medium-temperature and high-humidity airflow in the dehumidification air duct to improve dehumidification efficiency. At the same time, through the covering effect of the windshield casing 342, the air induction duct 341, the heat exchanger 343, the moisture exhaust fan 344, the evaporator 345, and the windshield casing 342 form a one-way flow of dehumidified air inside the heating chamber 13. The dehumidification is carried out when the humidity of the circulating heating air flow is high. The dehumidification process is carried out in the heating chamber 13, which avoids the traditional baking room using a dehumidification fan to directly discharge the internal high-humidity gas and replenish the external air for dehumidification, which will bring out a large amount of The problem of heat effectively reduces the direct discharge of medium-temperature high-humidity airflow and medium-temperature low-humidity airflow during the dehumidification process, thereby effectively reducing heat loss caused by the discharge of circulating heating airflow, improving heat utilization and improving the drying efficiency of the tobacco room.

This embodiment uses a plate heat exchanger with vertically intersecting air inlet ducts 3431 and air outlet ducts 3432. The heat exchanger 343 is installed obliquely in the windshield casing 342, and the heat exchanger is The air inlet opening of the air inlet duct 3431 of 343 is inclined downward to communicate with the air induction duct 341. At the same time, the air induction duct 341 is installed at the lower circulation air outlet 122 to communicate with the tobacco curing chamber 14. The air inlet opening can be passed through the lower circulation air outlet 122 from the tobacco curing chamber 14. Part of the medium-temperature and high-humidity airflow returning to the heating chamber 13 enters the direct induction duct 341. At the same time, through the suction function of the moisture exhaust fan 344, the airflow entering the dehumidification mechanism 34 is effectively increased, which can effectively improve the dehumidification treatment of the dehumidification mechanism 34. quantity, improve dehumidification efficiency, and help ensure the quality of tobacco leaf drying. In addition, by using a plate heat exchanger with vertically cross-arranged air inlet ducts 3431 and air outlet ducts 3432, the medium-temperature and high-humidity airflow that has just entered the heat exchanger 343 can be pre-cooled to improve the efficiency of the evaporator 345. The dehumidification effect of the airflow can also preheat the low-temperature and low-humidity airflow that will be discharged from the heat exchanger 343 after dehumidification, so that the temperature of the low-temperature and low-humidity airflow is close to the temperature of the medium-temperature and high-humidity airflow in the cycle, so that the two airflows can merge faster Enter the next cycle.

In one embodiment, a fresh air damper 346 is installed on the outer wall of the air induction duct 341 for one-way communication toward the air induction duct 341. A fresh air fan 347 is also installed on the outer end of the fresh air damper 346, and is installed on The two fresh air fans 347 on the two fresh air dampers 346 are respectively installed through the left and right wall panels of the heating chamber 13, so that when the humidity of the circulating air flow is relatively high, the fresh dry air outside the baking room can be blown through by the blowing action of the fresh air fans 347. The fresh air damper 346 is added to the curing room to promote the circulation flow of the heated air flow between the tobacco curing chamber 14 and the heating chamber 13 and to promote the dehumidification of the circulating heated air flow. By arranging the fresh air damper 346 on the outer wall of the air induction duct 341, the fresh dry air supplied into the baking room can first be dehumidified by the dehumidification mechanism 34, and then enter the heating chamber 13 to mix with the circulating air flow and participate in the circulation, which can effectively improve the efficiency of the oven. The dehumidification effect and dehumidification efficiency of the circulating heated air flow can be improved to improve the drying effect of tobacco leaves.

Specifically, when the fresh air fan 347 is turned on to supply fresh dry air into the baking room, the air pressure of the circulating air flow in the baking room increases, and the exhaust damper 131 provided on the front side wall of the heating chamber 13 opens under the action of the positive pressure air flow. , part of the medium-temperature airflow in the heating chamber 13 is discharged from the exhaust damper 131, thereby discharging the residual heat out of the baking room and balancing the air pressure inside and outside the baking room; by making the opening direction of the exhaust damper 131 toward the heat pump host 31, the heat pump host can pass 31 absorbs part of the waste heat of the air flow discharged from the exhaust damper 131 to increase the heat absorption of the heat pump host 31, thereby improving the heat utilization efficiency.

Optionally, the fresh air damper 346 is a self-vertical louver type one-way damper, and the opening direction of the damper is toward the air induction duct 341. Therefore, by using a self-vertical louver type one-way damper as the fresh air damper 346, the fresh air damper 346 can only be used in During the opening period of the fresh air fan 347, it is opened by the positive pressure air flow generated by the fresh air fan 347. During the closing period of the fresh air fan 347, it is in a normally closed state, which can effectively prevent the heating air flow in the baking room from flowing out from the fresh air damper 346 and avoid heating. Heat loss caused by airflow loss can effectively improve heat utilization efficiency.

In one embodiment, a guide plate 6 is installed at the upper corner of the front side of the heating chamber 13. The cross section of the guide plate 6 is an arc-shaped structure, so that the circulation can be adjusted through the guide plate 6. The flow direction of the heated airflow effectively avoids the accumulation or backflow of the airflow at the front upper corner of the heating chamber 13, which can effectively improve the utilization rate of the heated airflow and the speed of the circulating heated airflow entering the tobacco-curing chamber 14, thereby improving the drying of the tobacco leaves. dry efficiency.

Specifically, in the present invention, the first lifting mechanism 22 and the second lifting mechanism 23 in the cigarette hanging mechanism 2, as well as the heat pump host 31, circulation fan 32, moisture exhaust fan 344, and fresh air fan in the heat pump unit 3 can be The electric control circuits and switches of 347 and other components are uniformly arranged in the electric control cabinet. The electric control cabinet can be installed on the outside of the wall panel of the baking room body 1, or can be placed directly on the bottom plate 11 or the ground to facilitate control of each element in the baking room. The starting, stopping, operating power and other operating states of the components are controlled; specifically, multiple temperature sensors and humidity sensors can also be arranged in the heating chamber 13 and the tobacco chamber 14, and the sensors are electrically connected to each of the above components through the controller. In order to facilitate real-time monitoring of the temperature and humidity in the heating chamber 13 and the tobacco-curing chamber 14 through sensors, it is possible to control each element in the curing chamber according to the temperature and humidity information in the heating chamber 13 and the tobacco-curing chamber 14, as well as the baking process requirements of the tobacco leaves. control the operating status.

Working process of the present invention:

Before starting the drying operation, the second and third tobacco rod racks 25 and 26 are respectively lowered to a position slightly higher than the first tobacco rod rack 24 through the first and second lifting mechanisms 22 and 23, and then Place the tobacco rods with tobacco leaves hanging on the third tobacco rod rack 26 , the second tobacco rod rack 25 , and the first tobacco rod rack 24 in sequence. After the third tobacco rod rack 26 is placed and is lifted and reset by the second lifting mechanism 23 Start placing tobacco rods on the second tobacco rod rack 25. After the second tobacco rod rack 25 is placed and is lifted and reset by the first lifting mechanism 22, the tobacco rods are placed on the first tobacco rod rack 24. Thus, the tobacco curing chamber 14 is completed. The filling operation of tobacco leaves to be dried.

In the early heating stage of tobacco leaf drying, under the heating effect of the heat pump host 31 and the condenser 33, the normal temperature gas in the circulating air duct undergoes heat exchange when passing through the condenser 33, forming a high-temperature air flow. Under the pushing effect of the circulating fan 32, The high-temperature airflow is sent from the heating chamber 13 to the tobacco-curing chamber 14 through the upper circulation air outlet 121, and is evenly distributed in the tobacco-curing chamber 14 under the guidance of the air guide plate 4. The high-temperature airflow affects the tobacco leaves in the tobacco-curing chamber 14. A drying effect is produced, and then under the continuous air supply of the circulating fan 32, the high-temperature airflow that first enters the tobacco-curing chamber 14 contacts the tobacco leaves and becomes a medium-temperature and high-humidity airflow, and then returns from the tobacco-curing chamber 14 to the heating chamber through the lower circulation air outlet 122. 13 and then heated by the condenser 33, and the heated air flow flows back and forth to form a circulating heated air flow to continuously dry the tobacco leaves; during this period, the moisture removal fan 344 and the fresh air fan 347 in the dehumidification mechanism 34 are in a closed state, and the evaporator 345 is normal During operation, a small amount of medium-temperature and high-humidity heated air flow normally passes through the dehumidification mechanism 34, and the air flow passes through the evaporator 345 to produce a dehumidification effect and becomes a medium-temperature and low-humidity air flow and mixes into the circulating medium-temperature and high-humidity air flow.

When the humidity of the circulating airflow reaches a certain value, the dehumidification fan 344 in the dehumidification mechanism 34 is started to start the dehumidification operation. Under the suction effect of the moisture dehumidification fan 344, the lower circulation air outlet 122 is returned from the tobacco chamber 14 to the heating chamber 13 Part of the medium-temperature and high-humidity airflow enters the dehumidification air duct. In the dehumidification air duct, the medium-temperature and high-humidity airflow flows through the air induction duct 341, the air inlet duct 3431 of the heat exchanger 343, the moisture exhaust fan 344, the evaporator 345, and the heat exchanger in sequence. In the air outlet duct 3432 of the evaporator 343, after the medium-temperature and high-humidity airflow passes through the evaporator 345 for heat exchange and cooling, the water vapor in the airflow is condensed and separated from the airflow to achieve dehumidification, so that the medium-temperature and high-humidity airflow is transformed into a medium-temperature and low-humidity airflow and enters the heating chamber 13. It is then mixed with the remaining medium-temperature and high-humidity airflow and heated by the condenser 33, and then converted into high-temperature airflow and enters the circulating air duct to continuously dry the tobacco leaves.

When the humidity of the circulating air flow is high, the fresh air fan 347 is turned on, and the fresh dry air outside the baking room is supplied into the baking room through the fresh air damper 346 through the blowing effect of the fresh air fan 347, so as to promote the heated air flow in the tobacco-curing chamber 14 and the heating chamber 13 The circulating flow between them and the promotion of dehumidification of the circulating heating air flow. After the fresh dry air supplied to the curing room is dehumidified by the dehumidification mechanism 34, it enters the heating chamber 13 to mix with the circulating air flow and participate in the circulation to dry the tobacco leaves; when the fresh air After the fan 347 is turned on to supply fresh dry air into the baking room to increase the air pressure of the circulating air flow in the baking room, the exhaust damper 131 is opened under the action of the positive pressure air flow, and part of the medium-temperature airflow in the heating chamber 13 is discharged from the exhaust damper 131 , thereby discharging the waste heat out of the baking room, and at the same time, the heat pump host 31 absorbs part of the waste heat of the air flow discharged from the exhaust damper 131 .

The circulating heated air flow continues to circulate during the dehumidification process to continuously dry the tobacco leaves. After the tobacco leaves meet the drying process requirements, the heat pump unit 3 is turned off, the heated air flow stops circulating, and then the tobacco loading door 15 can be opened to place the first tobacco rod rack. 24. The tobacco rods on the second tobacco rod rack 25 and the third tobacco rod rack 26 are sequentially unloaded, thus completing one round of tobacco leaf drying operation.

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be implemented in the form and Various changes may be made to the details without departing from the scope of the invention as defined by the claims.

Claims (10)

1. An air source heat pump tobacco flue-curing house, characterized by comprising:

the curing barn body (1) comprises a bottom plate (11), and a heating chamber (13) and a tobacco flue-curing chamber (14) which are arranged on the bottom plate (11) and separated by a partition plate (12), wherein an upper circulating air port (121) and a lower circulating air port (122) are respectively arranged at the upper end and the lower end of the partition plate (12) so that the heating chamber (13) is communicated with the tobacco flue-curing chamber (14);

the tobacco hanging mechanism (2) is used for placing tobacco rods hung with tobacco leaves, the tobacco hanging mechanism (2) comprises a first tobacco rod frame (24), a second tobacco rod frame (25) and a third tobacco rod frame (26) which are sequentially arranged on two sides of the tobacco flue-curing chamber (14) from bottom to top through a bracket (21), a first lifting mechanism (22) and a second lifting mechanism (23), the spacing between the first tobacco rod frame (24), the second tobacco rod frame (25) and the third tobacco rod frame (26) is adjustable, and the first tobacco rod frame (24), the second tobacco rod frame (25), the third tobacco rod frame (26) and the inner side wall of a wallboard of the tobacco flue-curing chamber (14) are arranged at intervals;

the heat pump unit (3) is used for providing the heat source for the tobacco flue-curing chamber (14), the heat pump unit (3) includes heat pump host computer (31), circulating fan (32), condenser (33) and is used for the dehumidification mechanism (34), heat pump host computer (31) set up the position department that is located the heating chamber (13) outside on bottom plate (11), and heat pump host computer (31) are connected with condenser (33) through the heat exchange tube, condenser (33) and circulating fan (32) are installed in heating chamber (13) along circulating air flow direction level in proper order, make the circulating air flow of formation in heating chamber (13) and the tobacco flue-curing chamber (14), dehumidification mechanism (34) symmetry sets up the left and right sides in heating chamber (13) inner bottom, and the air inlet of dehumidification mechanism (34) communicates with tobacco flue-curing chamber (14) and heating chamber (13) respectively, the position department that is located between condenser (33) and the dehumidification mechanism (34) on one side wallboard of heating chamber (13) towards heat pump host computer (31) is provided with air vent (131).

2. An air source heat pump tobacco flue-curing house according to claim 1, characterized in that: the flue-cured tobacco chamber (14) is internally and horizontally provided with an air deflector (4) with the same height as the bottom surface of the upper circulating air port (121), the front end of the air deflector (4) is connected with a partition plate (12), the air deflector (4) and the side wall of the flue-cured tobacco chamber (14) form an air guide channel (5) at the top of the flue-cured tobacco chamber (14), and openings at the front end and the rear end of the air guide channel (5) are respectively communicated with the heating chamber (13) and the flue-cured tobacco chamber (14).

3. An air source heat pump tobacco flue-curing house according to claim 2, characterized in that: the air deflector (4) is also provided with at least two sequentially-enlarged air outlets (41) along the flowing direction of the circulating air flow.

4. An air source heat pump tobacco flue-curing house according to claim 1 or 3, characterized in that: the dehumidifying mechanism (34) comprises an induced air pipe (341) arranged at the bottom of the heating chamber (13), a wind shielding shell (342) and a heat exchanger (343), a moisture exhaust fan (344) and an evaporator (345) which are wrapped in the wind shielding shell (342), wherein the induced air pipe (341) is arranged at a lower circulating air port (122) and is communicated with the flue-cured tobacco chamber (14), the wind shielding shell (342) is of a box body structure with a semicircular arc-shaped cross section, one side, close to the induced air pipe (341), of the wind shielding shell (342) is provided with an opening, the heat exchanger (343) is obliquely arranged in the wind shielding shell (342), the heat exchanger (343) is provided with an air inlet air channel (3431) and an air outlet air channel (3432) which are vertically and crosswise arranged, the air inlet air channel (3431) is communicated with the induced air pipe (341), the air outlet air channel (3432) is oriented to the opening and is flush with the opening, the outer end of the air outlet of the heat exchanger (343) is provided with a moisture exhaust fan (343) with a blowing direction perpendicular to the air outlet air channel (3432), the heat exchanger (343) is arranged between the heat exchanger (343) and the heat exchanger (345) and the moisture exhaust fan (3432) which are respectively oriented to the moisture exhaust air channel (3432) of the evaporator (3411) and the moisture exhaust air channel (3432) through the vertical air inlet and the evaporator (3432) and the air inlet air channel (3432) which are arranged in the direction of the vertical air inlet and the evaporator (34air (3432) The dehumidifying fan (344) and the evaporator (345) form a one-way circulating dehumidifying air channel in the wind shielding shell (342).

5. The air source heat pump tobacco flue-curing house of claim 4, wherein: the air guiding pipe (341) is provided with a fresh air door (346) which is unidirectionally communicated towards the air guiding pipe (341), the outer end of the fresh air door (346) is also provided with a fresh air fan (347), and the two fresh air fans (347) arranged on the two fresh air doors (346) respectively penetrate through the left wall plate and the right wall plate of the heating chamber (13).

6. An air source heat pump tobacco flue-curing house as claimed in claim 5, wherein: the fresh air door (346) is a self-hanging shutter type one-way air door, and the opening direction of the air door faces the air guiding pipe (341).

7. An air source heat pump tobacco flue-curing house according to claim 1 or 6, characterized in that: the first lifting mechanism (22) and the second lifting mechanism (23) are screw rod slide block linear modules, the second tobacco rod frame (25) and the third tobacco rod frame (26) are respectively arranged on the slide blocks of the two linear modules, the lower limit position of the slide block of the second lifting mechanism (23) is higher than that of the first lifting mechanism (22), the outer sides of driving motors of the first lifting mechanism (22) and the second lifting mechanism (23) are provided with heat insulation shells (27), and the heat insulation shells (27) are arranged on wallboards on two sides of the flue-curing chamber (14).

8. The air source heat pump tobacco flue-curing house of claim 7, wherein: the air exhaust air door (131) of the heating chamber (13) is a self-hanging shutter type one-way air door, the opening direction of the air door faces the heat pump main machine (31), and the air exhaust air door (131) is in a normally closed state during heating.

9. The air source heat pump tobacco flue-curing house of claim 8, wherein: a guide plate (6) is arranged at the corner of the upper end of the front side of the heating chamber (13), and the cross section of the guide plate (6) is in an arc-shaped structure.

10. An air source heat pump tobacco flue-curing house as claimed in claim 9, wherein: and a tobacco loading door (15) is also arranged on the wallboard at the rear side of the flue-cured tobacco chamber (14) of the flue-cured tobacco house body (1).