CN109330010B

CN109330010B - Double dynamical roast room of inverter type flue-cured tobacco heat pump

Info

Publication number: CN109330010B
Application number: CN201811445623.4A
Authority: CN
Inventors: 崔国民; 何德意; 飞鸿; 杨雪彪
Original assignee: Yunnan Academy of Tobacco Agricultural Sciences
Current assignee: Yunnan Academy of Tobacco Agricultural Sciences
Priority date: 2018-11-29
Filing date: 2018-11-29
Publication date: 2021-04-16
Anticipated expiration: 2038-11-29
Also published as: CN109330010A

Abstract

The invention discloses a variable-frequency flue-cured tobacco heat pump dual-power curing barn which comprises a tobacco curing chamber, a heating chamber, a heat pump unit and a biomass fuel furnace, wherein the heating chamber is closed and is adjacent to the tobacco curing chamber, an air inlet is formed in the upper part of a heat insulation wall, an air return opening is formed in the lower part of the heat insulation wall, a guide wall is arranged in the heating chamber and is opposite to the air return opening, a heat pump evaporator of the heat pump unit is arranged opposite to a ventilation opening, a heat exchange device is arranged above the heat pump evaporator, a guide fan is arranged above the heat exchange device, a heat pump condenser of the heat pump unit is arranged in the heating chamber and is opposite to the air inlet. The invention realizes automatic control through the control device, can finely control temperature change, has high heat utilization efficiency, has low baking cost and energy conservation compared with other baking modes, reduces the baking and modulating loss of tobacco leaves, ensures that the tobacco leaves are harmonious in yellowing and color fixing, and is matched with drying and aroma, thereby realizing the baking targets of tobacco leaf yellowing, baking and aroma curing.

Description

Double dynamical roast room of inverter type flue-cured tobacco heat pump

Technical Field

The invention belongs to the technical field of tobacco baking equipment, and particularly relates to a variable-frequency type flue-cured tobacco heat pump dual-power baking room capable of effectively reducing energy consumption and improving heat utilization efficiency.

Background

With the rapid development of the tobacco industry, the standard of the tobacco leaf demand is higher and higher, the production of high-quality tobacco leaves is the main direction of the future development, and the science and technology cigarette has become the main melody of the development of the traditional agriculture to the modern tobacco leaves. The tobacco curing barn is matched by an advanced scientific technology, the internal quality and the external quality of tobacco leaves are continuously improved, the labor intensity and the production cost are reduced, the economic benefit is increased, and the tobacco curing barn becomes a necessary means for tobacco to mainly compete for the market at the present stage. In four links of tobacco seedling raising, planting, picking and baking, the baking is a link with the least controllable quality, the highest risk and the largest loss of the flue-cured tobacco. The tobacco leaf baking is an essential key link in the production of flue-cured tobacco, is also the weakest link in the production of the tobacco leaves at present, solves the problem of baking and modulating the tobacco leaves, namely maintains the enthusiasm of farmers for growing the tobacco and solves the problem of stable tobacco production.

Aiming at the problems existing in tobacco leaf baking, the problem is mainly solved by optimizing the structure of a bulk curing barn and matching with a special tobacco leaf baking controller at present, and the intensive production and management of tobacco leaves are greatly promoted, but the heat supply of the domestic bulk curing barn is mainly coal-fired, and various problems such as the quality of the baked tobacco leaves is influenced due to unstable combustion and uneven temperature rise, fuel waste is caused due to over-high ineffective energy consumption, and environmental damage is caused by the emission of a large amount of pollutants such as SO2, CO2, NOX, particulate matters and the like cannot be ignored. And current tobacco leaf toasts the controller with toasting temperature and humidity as control parameter, because the tobacco leaf maturity is different, lead to automatic control effect not good, and is intelligent, degree of automation is lower, toast and control relatively complicated, the recruitment level is high, and tobacco leaf adaptability is poor, and the quality needs to promote after the roast (present stage bulk curer exists artificial compulsory shortening the baking time, macromolecular compound decomposes the conversion inadequately in the tobacco leaf, and the synthetic volume of aroma material is less, leads to the tobacco leaf to have quality problems such as dull and stereotyped tobacco leaf is many after the roast, the colour is light, the oil content is few).

In order to overcome the defects, heating modes such as biomass granular fuel, electromagnetic heating, resistance heating, infrared heating and the like are provided, and a series of new problems are brought although some problems in coal-fired heating can be avoided. For example, the biomass particles are distributed dispersedly, the density is low, the distribution of the points of a manufacturer is less, the yield is low, the development is slow, and the baking technology of the biomass fuel baking room has a certain distance for breaking through the existing baking technology and completely realizing intelligent and precise baking. Although the electromagnetic heating is fast in heating, the energy consumption is high, the heat efficiency is low, and the energy is not saved; and resistance heating and infrared heating electricity adds roast room and gets rid of (or remain) the original firing equipment in roast room, at the original heating chamber in roast room and the indoor installation multiunit resistance wire of flue-cured tobacco or far infrared carbon fiber electrothermal tube, adjust the temperature in the roast room through the different combinations of control multiunit resistance wire or far infrared carbon fiber electrothermal tube, although control is comparatively simple, no matter resistance wire or far infrared carbon fiber electrothermal tube all have the inefficiency of generating heat, output can only segment control, lead to the not enough meticulous and steady problem of temperature adjustment.

Disclosure of Invention

The invention aims to provide a variable-frequency type flue-cured tobacco heat pump double-power curing barn capable of effectively reducing energy consumption and improving heat utilization efficiency.

The purpose of the invention is realized as follows: the tobacco curing device comprises a tobacco curing chamber, a heating chamber, a heat pump unit and a biomass fuel furnace, wherein the heating chamber is closed and is adjacent to the tobacco curing chamber, an air inlet is formed in the upper part of a heat insulation wall, a return air inlet is formed in the lower part of the heat insulation wall, a flow guide wall is arranged in the heating chamber just opposite to the return air inlet, a separation wall is arranged outside the flow guide wall, a ventilation channel is formed between the flow guide wall and the heat insulation wall, an installation space is formed between the flow guide wall and the separation wall, a ventilation opening communicated with the ventilation channel and the installation space is formed in the flow guide wall, a heat pump evaporator of the heat pump unit is arranged just opposite to the ventilation opening in the installation space, a heat exchange device is arranged in the installation space above the heat pump evaporator, a flow guide fan is arranged above the heat exchange device, a baffle perpendicular, the biomass fuel heat pump system is characterized in that a circulating fan is arranged in an air inlet behind a heat pump condenser, a biomass fuel furnace and a control device are arranged in a heating chamber on any side of a heat pump unit, variable frequency controllers are respectively arranged on the biomass fuel furnace, a heat pump evaporator, a flow guide fan, a flow guide switching valve, the heat pump condenser, a compressor of the heat pump unit, the circulating fan and a heat exchange device, and the variable frequency controllers are in signal connection with the control device.

Compared with the prior art, the invention has the following technical effects:

1. the invention adopts the air current closed cycle and the heat supply outside the biomass fuel furnace to be used simultaneously or alternatively to form double-power baking, so that the heating air current has large cycle and small treatment capacity in a baking room, and has the modes of heating, dehumidifying or condensing and dehumidifying through an air source heat pump to achieve the drying purpose;

2. the invention fully considers the problems of uneven quality, higher modulation difficulty and difficult moisture removal of various fresh tobacco leaves; the control ranges of the wind speed, the wind pressure and the rotating speed of the tobacco leaf baking in the yellowing stage, the withering stage, the color fixing stage and the dry-rib stage are controlled by adopting variable frequency, and the wind speed, the wind pressure and the rotating speed can be adjusted randomly according to objective actual requirements to meet the requirements of different working conditions; the baking aims of tobacco leaf yellowing and water loss coordination, color fixation and aroma enhancement, and dry and fragrance retention in the baking process are realized, the baked yellow tobacco rate can be greatly improved, and the tobacco leaf quality is improved; the tobacco leaves are effectively prevented from being baked under high-temperature conditions in the heating process, and the baking quality is reduced;

3. the invention can reduce the starch content of the cured tobacco leaves to about 3 percent to reach the standard level of the tobacco leaves, and in the curing process, the air flow closed cycle can effectively reduce the energy consumption, the heat utilization efficiency is high, the automatic control is realized through the control device, the operation is more convenient and simple, the temperature change can be finely and stably adjusted and controlled, compared with other types of curing modes, the curing cost is low, the energy is saved, the quality of fresh tobacco leaves can be properly reflected or fixed, the cured tobacco leaves are reduced, the tobacco leaf modulation loss is reduced, and the curing targets of tobacco leaf yellowing, drying and aroma curing are realized.

Drawings

FIG. 1 is a first schematic structural diagram of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a schematic structural view of a heat collecting tube according to the present invention;

FIG. 4 is a schematic structural view of a heat exchange apparatus according to the present invention;

FIG. 5 is a schematic view of the internal structure of the hexagonal housing of FIG. 4;

FIG. 6 is a schematic view of another embodiment of the heat collecting tube of the present invention;

reference numbers in the figures: 1 to a flue-curing house, 1a to a tobacco-curing chamber, 1b to a heating chamber, 1c to a heat-insulating wall, 1d to an air inlet, 1e to an air return port, 1f to a guide wall, 1g to a barrier wall, 1h to an air duct, 1i to a circulating fan, 2 to a biomass fuel furnace, 3 to a control device, 4 to a heat pump unit, 4a to a heat pump evaporator, 4b to a guide fan, 4c to a baffle, 4d to a guide switching valve, 4e to a heat pump condenser, 4f to a compressor, 4g to a circulating pipeline, 4h to a throttle valve, 4i to a condensation tank, 4j to a liquid discharge pipe, 5 to a heating fin, 6 to a heat collection pipe, 6a to a heat absorption pipe, 6b to a heat storage medium, 6c to a heat exchange pipe, 6d to a heat preservation pipe plug, 7 to a heat exchange device, 7a to a hexagonal housing, 7b to a pre-cooling guide plate, 7c to a heat pipe heat exchanger, 7e to the heat insulating block, 7f to the mobile base, 7g to the mobile base guide rail, 7h to the heating block, 7i to the gas port, 7j to the horizontal driving cylinder, 8 to the temperature sensor, 9 to the humidity transducer, 10 to the infrared spectrum analyzer.

Detailed Description

The invention is further described with reference to the accompanying drawings, but the invention is not limited in any way, and any alterations or substitutions based on the teaching of the invention are within the scope of the invention.

The dual-power curing barn of inverter type flue-cured tobacco heat pump that shown in attached figure 1~5, including flue-cured tobacco chamber 1a, heating chamber 1b, heat pump set 4, biomass fuel stove 2, its characterized in that: the heating chamber 1b is closed and is adjacent to the tobacco flue-curing chamber 1a, the upper part of a heat insulation wall 1c is provided with an air inlet 1d, the lower part of the heat insulation wall 1c is provided with an air return port 1e, the heating chamber 1b is internally provided with a guide wall 1f opposite to the air return port 1e, the outer side of the guide wall 1f is provided with a separation wall 1g, a ventilating duct 1h is formed between the guide wall 1f and the heat insulation wall 1c, an installation space is formed between the guide wall 1f and the separation wall 1g, the guide wall 1f is provided with a ventilating opening communicated with the ventilating duct 1h and the installation space, a heat pump evaporator 4a of a heat pump unit 4 is arranged in the installation space opposite to the ventilating opening, a heat exchange device 7 is arranged in the installation space above the heat pump evaporator 4a, a guide fan 4b is arranged above the heat exchange device 7, the top of the guide wall 1f is provided with a baffle 4c, just set up heat pump condenser 4e of heat pump set 4 to air intake 1d in heating chamber 1b, set up circulating fan 1i in air intake 1d at heat pump condenser 4e rear set up biomass fuel stove 2 and controlling means 3 in heating chamber 1b of heat pump set 4 arbitrary side, be provided with variable frequency controller respectively on biomass fuel stove 2, heat pump evaporimeter 4a, water conservancy diversion fan 4b, water conservancy diversion diverter valve 4d, heat pump condenser 4e, heat pump set 4's compressor 4f, circulating fan 1i, heat transfer device 7, variable frequency controller signal connection controlling means 3.

Any one or each lateral wall of flue-cured tobacco chamber 1a on evenly set up heating fin 5 from bottom to top, heating fin 5 connects thermal-collecting tube 6.

6 one ends of thermal-collecting tubes set up in ventiduct 1h, in the other end passed thermal-insulated wall 1c and extended into flue-cured tobacco chamber 1a, thermal-collecting tubes 6 include heat-absorbing tube 6a, heat accumulation medium 6b, heat exchange tube 6c and heat preservation stopcock 6d, heat-absorbing tube 6 a's one end is airtight and set up in ventiduct 1h, the other end sets up the opening and sets up in flue-cured tobacco chamber 1a, pack heat accumulation medium 6b in the heat-absorbing tube 6a, set up heat preservation stopcock 6d at heat exchange tube 6 c's opening part, heat exchange tube 6c one end is passed heat preservation stopcock 6d and is coaxial setting in heat-absorbing tube 6a, and heating fin 5 is connected.

Flue-cured tobacco chamber 1 a's top arrange and set up thermal-collecting tube 6, and thermal-collecting tube 6 is the acute angle setting with the water flat line, thermal-collecting tube 6 include heat-absorbing tube 6a, heat accumulation medium 6b, heat exchange tube 6c and heat preservation stopcock 6d, heat-absorbing tube 6 a's one end is airtight, and the other end sets up the opening, heat accumulation medium 6b fills in heat-absorbing tube 6a, sets up heat preservation stopcock 6d at heat exchange tube 6 c's opening part, heat exchange tube 6c one end is passed heat preservation stopcock 6d and is coaxial to be set up in heat-absorbing tube 6a, and the other end penetrates flue-cured tobacco chamber 1a in-connection.

The heat absorption tube 6a is a double-layer hollow tube, a heat absorption coating is coated on the inner tube wall of the heat absorption tube 6a, and the heat absorption tube 6a is vacuumized.

The heat exchange tube 6c is of a closed oval circulating tube structure, a heat exchange medium is filled in the heat exchange tube 6c, and a control valve is further arranged between the heat exchange tube 6c and the heating fin 5.

And a heat insulation layer is wrapped outside the heat exchange tube 6c between the heat absorption tube 6a and the heating fin 5.

The heat exchange device 7 comprises two hexagonal shells 7a, a guide plate 7b, a pre-cooling heat pipe heat exchanger 7c, a pre-heating heat pipe heat exchanger 7d, a heat insulation block 7e, a movable base 7f, a movable base guide rail 7g and a heating block 7h which are arranged in parallel, the hexagonal shells 7a are internally provided with a plurality of guide plates 7b at equal intervals from top to bottom in sequence, the adjacent guide plates 7b are arranged in a staggered manner, the guide plates 7b divide the hexagonal shells 7a into serpentine airflow channels, the top and the bottom of each hexagonal shell 7a are respectively provided with an air port 7i, the serpentine airflow channel of one hexagonal shell 7a is a pre-cooling channel, the serpentine airflow channel of the other hexagonal shell 7a is a pre-heating channel, and the airflow direction firstly passes through the pre-cooling channel of the hexagonal shell 7a and then passes through the pre-heating channel of the hexagonal shell, the pre-cooling heat pipe heat exchanger 7c is horizontal, the evaporation section is arranged in the pre-cooling channel, the heat insulation section and the condensation section pass through the baking room 1 and are positioned outside the baking room 1, the pre-heating heat pipe heat exchanger 7d is horizontal, the condensation section is arranged in the pre-heating channel, the heat insulation section and the evaporation section pass through the baking room 1 and are positioned outside the baking room 1, the heat insulation block 7e is arranged opposite to the pre-cooling heat pipe heat exchanger 7c, heat insulation holes corresponding to the pre-cooling heat pipe heat exchangers 7c one by one are arranged on one surface of the heat insulation block 7e opposite to the pre-cooling heat pipe heat exchanger 7c, the movable base 7f is arranged at the bottom of the heat insulation block 7e, the movable base guide rail 7g is arranged at the bottom of the movable base 7f, the movable base 7f is in sliding fit with the movable base guide rail 7g, heating holes corresponding to the pre-heating heat pipe heat exchangers 7d one by one are arranged on one surfaces of, and the evaporation section of the preheating heat pipe heat exchanger 7d is arranged in the heating hole.

And a horizontal driving cylinder 7j is arranged on the side surface of the heat insulation block 7 e.

The heating block 7h is made of heat-insulating materials, and electric heating elements are arranged in the heating holes.

The pre-cooling heat pipe exchanger 7c is provided with a pre-cooling working medium.

The preheating heat pipe heat exchanger 7d is provided with a preheating working medium.

The heating block 7h is made of heat-insulating materials, the inner wall of the heating hole is provided with a heat exchange tube 6c, and the heat exchange tube 6c is connected with a flue gas pipe of the biomass burner to form a closed loop.

The diversion switch valve 4d include the valve plate drive, and the valve plate of being connected with it, the valve plate drive sets up on baffle 4c, the valve plate sets up in ventiduct 1h top correspond the valve plate on thermal-insulated wall 1c and be provided with the supporting recess that suits with it.

The valve plate is driven by a hydraulic power unit or a cylinder.

A monitoring system connected with the control device 3 is arranged in the tobacco flue-curing chamber 1a, the monitoring system comprises a temperature sensor 8, a humidity sensor 9 and an infrared spectrum analyzer 10 which are arranged in the tobacco flue-curing chamber 1a, the temperature sensor 8 and the humidity sensor 9 are respectively arranged at a plurality of positions in the tobacco flue-curing chamber 1a and are in signal connection with the control device 3, the infrared spectrum analyzer 10 is arranged in the tobacco flue-curing chamber 1a, and a measuring probe is opposite to tobacco leaves; the temperature and the internal components (moisture, starch, pigment, protein and the like) of the tobacco leaves are detected and monitored in real time through an infrared spectrum analyzer 10 arranged in a tobacco curing chamber 1a, a field controller compares the temperature and the internal components of the tobacco leaves with a stored curing curve by combining the temperature and humidity conditions of a temperature and humidity monitoring system in the curing chamber 1, the rotating speed of a circulating fan 1i and the opening and closing of a compressor 4f of a heat pump unit 4 and a throttle valve 4h between a heat pump condenser 4e and a heat pump evaporator 4a are intelligently controlled, the temperature and the humidity in the curing chamber 1 can be timely and accurately adjusted, the curing quality is improved, and the purposes of reducing the loss of the tobacco leaves and improving the flavor are achieved.

Heat pump set 4 still include compressor 4f, circulating line 4g and choke valve 4h, compressor 4f is connected to circulating line 4g one end, and the other end connects back compressor 4f behind heat pump evaporator 4a, the heat pump condenser 4e in proper order, choke valve 4h sets up on circulating line 4g between heat pump evaporator 4a and the heat pump condenser 4 e.

The bottom of the heat pump evaporator 4a is provided with a condensation pool 4i, and the condensation pool 4i is provided with a liquid discharge pipe 4j connected with the outside.

The control device 3 is respectively connected with the horizontal driving cylinder 7j, the electric heating element, the valve plate drive, the guide fan 4b and the circulating fan 1i, and buttons for starting or stopping the horizontal driving cylinder 7j, the electric heating element, the valve plate drive, the biomass burner, the guide fan 4b and the circulating fan 1i are arranged on a control panel of the control device 3.

The control device 3 is a PLC programmable logic controller or a PC.

As shown in fig. 6, in another embodiment of the heat collecting tube 6, the heat collecting tube 6 is arranged at the top of the tobacco flue-curing chamber 1a, the heat collecting tube 6 is arranged at an acute angle with the horizontal line, the heat collecting tube 6 includes a heat absorbing tube 6a, a heat storage medium 6b, a heat exchanging tube 6c and a heat preservation tube plug 6d, one end of the heat absorbing tube 6a is closed, the other end of the heat absorbing tube is provided with an opening, the heat storage medium 6b is filled in the heat absorbing tube 6a, the heat preservation tube plug 6d is arranged at the opening of the heat exchanging tube 6c, one end of the heat exchanging tube 6c penetrates through the heat preservation tube plug 6d and is coaxially arranged in the heat absorbing tube 6a, the other end of the heat exchanging tube penetrates downward into the tobacco flue-curing chamber 1a to be connected with the heating fin 5, the heat absorbing tube 6a can directly.

The working principle and the working process of the invention are as follows: flue-cured tobacco is loaded into a tobacco curing chamber 1a and sealed, a biomass fuel furnace 2 is started to burn and convey hot air into the tobacco curing chamber 1a, the hot air is extracted by a circulating fan 1i, enters the tobacco curing chamber 1a from an air inlet 1d, and is discharged into an air duct 1h from an air return port 1e after being circulated in the tobacco curing chamber 1a for next circulation; in the baking process, the tobacco leaves in the tobacco curing chamber 1a are heated by utilizing the heat pump condenser 4e of the heat pump unit 4 to release heat according to actual needs, and the moisture in the return air of the tobacco curing chamber 1a is filtered by utilizing the dehumidifying function of the heat pump evaporator 4a of the heat pump unit 4, so that the heating and dehumidifying functions of a set of units are realized, the moisture generated in the dehumidifying process of the heat pump evaporator 4a is condensed and collected in the condensing pool 4i, and is discharged by the liquid discharge pipe 4 j.

In the baking process, each frequency converter can be controlled by the control device 3 according to objective and actual needs, so that each frequency converter can control and randomly adjust the working frequency of the biomass fuel furnace 2, the heat pump evaporator 4a, the flow guide fan 4b, the flow guide switching valve 4d, the heat pump condenser 4e, the compressor 4f of the heat pump unit 4, the circulating fan 1i or the heat exchange device 7 which are correspondingly connected with the frequency converter, and increase or decrease the working frequency, thereby achieving the purposes of finely and stably adjusting and controlling the temperature change in the tobacco baking chamber 1a and avoiding the over-large temperature change amplitude or inaccurate influence on the baking quality of the tobacco leaves in the tobacco baking chamber 1 a.

When preheating or precooling is not needed, the heat exchange device 7 is closed, the valve plate is controlled to drive and open the valve plate, the airflow in the air duct 1h directly rises to contact the heat pump condenser 4e, and enters the tobacco curing chamber 1a from the air inlet 1d after exchanging heat with the heat pump condenser 4 e; when preheating or precooling is needed, the heat exchange device 7 is started, the valve plate is controlled to drive and close the valve plate, air flow is blocked from flowing out from the top of the air duct 1h, the air flow in the air duct 1h is enabled to completely enter the heat exchange device 7 for preheating or precooling, the preheated or precooled air flow is discharged from the air port 7i, is extracted by the diversion fan 4b and is conveyed to exchange heat with the heat pump condenser 4e, and then enters the tobacco flue-curing chamber 1a from the air inlet 1d, and tobacco leaves are cured.

During baking, partial heat energy of the air flow in the air duct 1h is absorbed by the heat absorption tube 6a and is stored in the heat storage medium 6b in advance, or the heat energy in sunlight is absorbed by the heat absorption tube 6a and is stored in the heat storage medium 6b in advance, during baking, a control valve on the heat exchange tube 6c is opened, so that the heat exchange medium circularly flows in the heat exchange tube 6c, the heat energy in the heat storage medium 6b is exchanged to the heating fin 5, and the heating fin 5 heats the air in the flue-cured tobacco chamber 1a and provides baking heat energy for the flue-cured tobacco chamber 1 a; the problem that the baking requirements cannot be met when the temperature provided by the biomass fuel furnace 2 is too low or the temperature sent by the heat pump condenser 4e is too low due to the fact that baking personnel cannot supplement fuel for the biomass fuel furnace 2 in time due to busy affairs is effectively solved; in addition, in the baking process, under the conditions of clear weather and better illumination conditions, the biomass fuel furnace 2 can be closed, the heat collecting pipes 6 directly absorb sunlight and convert the sunlight into heat energy to be supplied to the heating fins 5, and the heating fins 5 heat the gas in the tobacco baking chamber 1a to bake the tobacco leaves.

The preheating or precooling working principle of the heat exchange device 7 is as follows: moist air discharged from a tobacco curing chamber 1a enters an air duct 1h, enters a precooling channel from an air port 7i at the top of a hexagonal shell 7a in the ascending process, a precooling working medium in an evaporation section of a precooling heat pipe heat exchanger 7c absorbs heat and evaporates to generate steam in the process of passing through the precooling channel, the steam flows to a condensation section under the action of the pressure difference in a pipe, and the condensation section is positioned outside a curing barn 1, namely the steam is condensed into liquid and emits heat, and the precooling working medium liquid flows back to the evaporation section again to be evaporated again, so that the operation is repeated, and the effect of precooling the moist air is achieved; the precooled wet air is discharged from an air port 7i at the bottom of the hexagonal shell 7a and passes through a heat pump evaporator 4a of the heat pump unit 4, and the wet air is condensed on the surface of the heat pump evaporator 4a to form liquid drops, namely, dehumidification is carried out; the dehumidified air enters the preheating channel from an air port 7i at the bottom of the other hexagonal shell 7a, the lower-temperature air flow passes through the preheating channel, the preheating working medium at the evaporation section of the preheating heat pipe exchanger 7d absorbs heat and evaporates to generate steam under the action of the heating block 7h, the steam flows to the condensation section under the action of the pressure difference in the pipe, the condensation section heats the air flow in the preheating channel, meanwhile, the steam is condensed into liquid, the preheating working medium liquid flows back to the evaporation section again to be evaporated again, and the operation is repeated in such a way, so that the effect of preheating the air is achieved; the preheated air is discharged from an air port 7i at the top of the hexagonal shell 7 a; reaching a heat pump condenser 4e of the heat pump unit 4, namely heating the air flow to meet the baking requirement; when the humidity of the baking room 1 meets the baking requirement and dehumidification is not needed, starting the horizontal driving cylinder 7j, and driving the heat insulation block 7e to move towards the pre-cooling heat pipe heat exchanger 7c by the movable base 7f, so that the heat insulation section and the condensation section of the pre-cooling heat tank heat exchanger are sleeved in the heat insulation holes; when the air flow does not need to be preheated, heating is carried out by stopping the heating block 7 h.

Claims

1. The utility model provides a double dynamical roast room of inverter type flue-cured tobacco heat pump, includes flue-cured tobacco chamber (1 a), heating chamber (1 b), heat pump set (4), biomass fuel stove (2), its characterized in that, heating chamber (1 b) is airtight and adjacent with flue-cured tobacco chamber (1 a) and thermal-insulated wall (1 c) upper portion sets up air intake (1 d) and the lower part sets up return air inlet (1 e), just set up guide wall (1 f) to return air inlet (1 e) in heating chamber (1 b), set up separation wall (1 g) in the outside of guide wall (1 f), make form between guide wall (1 f) and thermal-insulated wall (1 c) ventiduct (1 h), form the installation space between guide wall (1 f) and separation wall (1 g), set up the vent of UNICOM ventiduct (1 h) and installation space on guide wall (1 f), just set up heat pump evaporator (4 a) of heat pump set up UNICOM (4) to the vent in the installation space, a heat exchange device (7) is arranged in an installation space above a heat pump evaporator (4 a), a flow guide fan (4 b) is arranged above the heat exchange device (7), a baffle plate (4 c) perpendicular to the flow guide wall (1 f) is arranged at the top of the flow guide wall (1 f), a flow guide switching valve (4 d) is arranged between the baffle plate (4 c) and a heat insulation wall (1 c), a heat pump condenser (4 e) of the heat pump unit (4) is arranged in the heating chamber (1 b) just opposite to an air inlet (1 d), a circulating fan (1 i) is arranged in the air inlet (1 d) behind the heat pump condenser (4 e), a biomass fuel furnace (2) and a control device (3) are arranged in the heating chamber (1 b) on any side of the heat pump unit (4), and the biomass fuel furnace (2), the heat pump evaporator (4 a), the flow guide fan (4 b), the flow guide switching valve (, The heat pump condenser (4 e), the compressor (4 f) of the heat pump unit (4), the circulating fan (1 i) and the heat exchange device (7) are respectively provided with a variable frequency controller, and the variable frequency controllers are in signal connection with the control device (3); heating fins (5) are uniformly arranged on any one or each side wall of the tobacco flue-curing chamber (1 a) from bottom to top, and the heating fins (5) are connected with heat collecting pipes (6); one end of the heat collecting pipe (6) is arranged in the air duct (1 h), the other end of the heat collecting pipe penetrates through the heat insulation wall (1 c) and extends into the flue-cured tobacco chamber (1 a), the heat collecting pipe (6) comprises a heat absorbing pipe (6 a), a heat storage medium (6 b), a heat exchanging pipe (6 c) and a heat preservation pipe plug (6 d), one end of the heat absorbing pipe (6 a) is sealed and arranged in the air duct (1 h), the other end of the heat collecting pipe is provided with an opening and arranged in the flue-cured tobacco chamber (1 a), the heat storage medium (6 b) is filled in the heat absorbing pipe (6 a), the heat preservation pipe plug (6 d) is arranged at the opening of the heat exchanging pipe (6 c), one end of the heat exchanging pipe (6 c) penetrates through the heat preservation pipe plug (6 d) and is coaxially arranged in the heat; the diversion switching valve (4 d) comprises a valve plate drive and a valve plate connected with the valve plate drive, the valve plate drive is arranged on a baffle (4 c), the valve plate is arranged at the top of the ventilation channel (1 h), and a bearing groove matched with the valve plate is arranged on the heat insulation wall (1 c) corresponding to the valve plate.

2. The dual-power curing barn with the variable-frequency flue-cured tobacco heat pump according to claim 1, wherein the heat absorption pipe (6 a) is a double-layer hollow pipe, a heat absorption coating is coated on the inner pipe wall of the heat absorption pipe (6 a), and the heat absorption pipe (6 a) is vacuumized; the heat exchange tube (6 c) is of a closed elliptical circulating tube structure, a heat exchange medium is filled in the heat exchange tube (6 c), and a control valve is arranged between the heat exchange tube (6 c) and the heating fin (5); and a heat insulation layer is wrapped outside the heat exchange tube (6 c) between the heat absorption tube (6 a) and the heating fin (5).

3. The variable-frequency flue-cured tobacco heat pump dual-power curing barn according to claim 1, wherein the heat exchange device (7) comprises two hexagonal shells (7 a) arranged in parallel, a guide plate (7 b), a pre-cooling heat pipe heat exchanger (7 c), a pre-heating heat pipe heat exchanger (7 d), a heat insulation block (7 e), a movable base (7 f), a movable base guide rail (7 g) and a heating block (7 h), a plurality of guide plates (7 b) are sequentially arranged in the hexagonal shells (7 a) at equal intervals from top to bottom, adjacent guide plates (7 b) are arranged in a staggered manner, the guide plates (7 b) divide the hexagonal shells (7 a) into serpentine airflow channels, the top and the bottom of each hexagonal shell (7 a) are respectively provided with an air port (7 i), and the serpentine airflow channel of one hexagonal shell (7 a) is the pre-cooling channel, the snakelike airflow channel of the other hexagonal shell (7 a) is a preheating channel, the airflow direction firstly passes through the precooling channel of the hexagonal shell (7 a) and then passes through the preheating channel of the hexagonal shell (7 a), the precooling heat pipe heat exchanger (7 c) is horizontal, the evaporation section is arranged in the precooling channel, the heat insulation section and the condensation section pass through the baking room (1) and are positioned outside the baking room (1), the preheating heat pipe heat exchanger (7 d) is horizontal, the condensation section is arranged in the preheating channel, the heat insulation section and the evaporation section pass through the baking room (1) and are positioned outside the baking room (1), the heat insulation block (7 e) and the precooling heat pipe heat exchanger (7 c) are oppositely arranged, the surface of the heat insulation block (7 e) opposite to the precooling heat pipe heat exchanger (7 c) is provided with heat insulation holes corresponding to the precooling heat pipe heat exchanger (7 c) one by one, the movable base (7 f) is arranged at the bottom of the heat insulation block (7 e), remove base guide rail (7 g) locate and remove base (7 f) bottom, and remove base (7 f) and remove base guide rail (7 g) sliding fit, heating block (7 h) and the one side relative of preheating heat pipe exchanger (7 d) be equipped with the heating hole of preheating heat pipe exchanger (7 d) one-to-one, and preheat the evaporation zone of heat pipe exchanger (7 d) and locate in the heating hole.

4. The dual-power curing barn with the variable-frequency flue-cured tobacco heat pump according to claim 3, wherein a horizontal driving cylinder (7 j) is arranged on the side surface of the heat insulation block (7 e), the heating block (7 h) is made of heat-insulating materials, and an electric heating element is arranged in the heating hole; the pre-cooling and heating pipe heat exchanger (7 c) is provided with a pre-cooling working medium; the preheating heat pipe heat exchanger (7 d) is provided with a preheating working medium.

5. The dual-power curing barn with the variable-frequency flue-cured tobacco heat pump according to claim 1, wherein a monitoring system connected with the control device (3) is arranged in the tobacco curing chamber (1 a), the monitoring system comprises a temperature sensor (8), a humidity sensor (9) and an infrared spectrum analyzer (10) which are arranged in the tobacco curing chamber (1 a), the temperature sensor (8) and the humidity sensor (9) are respectively arranged at multiple positions in the tobacco curing chamber (1 a) and are in signal connection with the control device (3), and the infrared spectrum analyzer (10) is arranged in the tobacco curing chamber (1 a) and is just opposite to tobacco leaves through a measuring probe.

6. The dual-power curing barn with the variable frequency flue-cured tobacco heat pumps according to claim 1, wherein the heat pump unit (4) further comprises a compressor (4 f), a circulating pipeline (4 g) and a throttle valve (4 h), one end of the circulating pipeline (4 g) is connected with the compressor (4 f), the other end of the circulating pipeline (4 g) is sequentially connected with a heat pump evaporator (4 a) and a heat pump condenser (4 e) and then connected with the compressor (4 f), and the throttle valve (4 h) is arranged on the circulating pipeline (4 g) between the heat pump evaporator (4 a) and the heat pump condenser (4 e).