CN110762968B - Air source heat pump drying device and drying method thereof - Google Patents

Abstract

The invention discloses an air source heat pump drying device and a drying method thereof, wherein the air source heat pump drying device comprises a drying room and an air source heat pump dryer, wherein the drying room is communicated between a heat source air inlet and a heat source air outlet of the air source heat pump dryer through an air duct; the air source heat pump dryer comprises a compressor, a condenser, an expansion valve and an evaporator which are sequentially communicated and form a circulating pipeline; the condenser is provided with two openings for forming the heat source air inlet and the heat source air outlet; the condenser is also provided with a dehumidifying mechanism for discharging moisture in the air flow. The invention improves the control on the drying degree, reduces the pollution to the environment, increases the humidifying equipment and meets the drying requirement of special wood.

Description

Air source heat pump drying device and drying method thereof

Technical Field

The invention relates to the technical field of wood drying equipment, in particular to an air source heat pump drying device and a drying method thereof.

Background

Wood contains a certain amount of moisture. The amount of water in the wood varies with the species, age and season of felling. In order to ensure the quality and prolong the service life of the wood and the wooden products, proper measures must be taken to reduce the moisture (water content) in the wood to a certain degree. To reduce the moisture content of the wood, the temperature of the wood is increased to evaporate and move the moisture in the wood outward, so that the moisture rapidly leaves the wood in the air with a certain flow speed, thereby achieving the purpose of drying.

The existing drying equipment is many, and some equipment adopts coal, fuel oil or biomass to generate high-temperature steam to blow hot air through the heat exchange coil pipe so as to achieve the drying purpose. Such devices suffer from a number of disadvantages, for example: 1. coal, biomass, oil and the like belong to non-renewable energy sources, and waste gas is discharged during combustion, so that the environment is polluted, and the energy utilization rate is not high. 2. Steam is generated by heating water, so that the cost is higher, the temperature control is not accurate, and the quality control of the dried product is not good. 3. The drying room can not be dehumidified by itself, and the damp and hot steam in the drying room can not be exhausted out of the room through the dehumidifying fan.

In addition, in order to meet the dehumidification requirement in the drying process, some drying equipment is improved, and the dehumidification function is added. However, for some rare woods, in order to achieve the effect of thorough drying (the moisture in the interior and the moisture on the surface of the wood need to be reduced to a certain degree), and simultaneously, the situation that the surface of the wood cracks after being dried is also prevented, and the surface of the wood needs to be locally humidified in the drying process so as to avoid cracking. Therefore, the improved drying equipment does not have the humidifying function, and the drying requirement of the special wood cannot be met.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an air source heat pump drying device, which aims to improve the control on the drying degree, reduce the pollution to the environment, increase humidifying equipment and meet the drying requirement of special wood.

The invention provides an air source heat pump drying device which comprises a drying room and an air source heat pump dryer, wherein the drying room is communicated between a heat source air inlet and a heat source air outlet of the air source heat pump dryer through an air duct;

the air source heat pump dryer comprises a compressor, a condenser, an expansion valve and an evaporator which are sequentially communicated and form a circulating pipeline; the condenser is provided with two openings for forming the heat source air inlet and the heat source air outlet; the condenser is also provided with a dehumidifying mechanism for discharging moisture in the air flow.

The invention has the beneficial effects that:

the air source heat pump dryer utilizes the reverse Carnot principle, a refrigerant is continuously evaporated from an evaporator, the refrigerant is compressed by a compressor and then flows through a condenser, heat formed by the condenser is blown into a drying room from a heat source air outlet through an air inlet duct, then the heat enters an air cavity of the condenser from a heat source air inlet through an air return duct to absorb the heat of the condenser, and then the heat is continuously sent into the drying room. While the refrigerant continues through the expansion valve and into the evaporator, thereby continuing the thermodynamic cycle process. The equipment uses less electric energy to meet the drying requirement of the drying room, avoids pollution caused by burning coal, fuel oil or biomass and the like, and improves the protection to the environment. The air source heat pump dryer has a temperature control function and a dehumidification function, and can accurately control the problems and humidity in the drying chamber, so that the control on the drying degree is improved.

Preferably, the heat source air inlet is communicated with the top wall of the drying room through an air inlet duct, and an atomization humidifier is arranged at an inlet of the air inlet duct; and the heat source air outlet is communicated with the side wall of the drying room through an air return duct.

When the wood needs to be humidified, the atomization humidifier sends water mist, and the water mist enters the drying room through the airflow of the air inlet duct and humidifies the outer surface of the wood. The humidifying mode is simple, the production and manufacturing cost is low, and the control of the production cost is facilitated.

Preferably, the drying room further comprises a conveying mechanism and an automatic door arranged on the side face of the drying room; the transportation mechanism comprises a track and a traveling crane traveling on the track, the track comprises a first section of track installed in the drying room and a second section of track installed outside the drying room, and the first section of track and the second section of track can be in butt joint and detached.

The automatically-controlled door is equipped with two electric jars, and the jar seat of electric jar is articulated with the inside wall in stoving room, and the telescopic link of electric jar is articulated with the automatically-controlled door, thereby realizes opening and closing of automatically-controlled door through the electric jar is flexible. The driving goes to the stoving outside of room through the track, exposes the driving completely, has avoided the manual work to move into timber and has moved out, replaces artifical transport through the driving, has improved ligneous artifical transport efficiency.

Preferably, the travelling crane comprises a base, a carrying plate and a lifting mechanism; the roller of the base rolls on the track, and the lifting mechanism is connected between the base and the carrying plate; the lifting mechanism comprises a lifting column group and a first hydraulic cylinder group, the lifting column group and the first hydraulic cylinder group are both installed between the base and the loading plate along the vertical direction, and the loading plate ascends and descends due to the fact that the first hydraulic cylinder group stretches and retracts.

When the wood on the carrying plate is not much and belongs to precious wood, the carrying plate needs to be lifted through the lifting mechanism so as to be convenient for humidification.

Preferably, a spraying system is further included; the spraying system comprises a first spraying group arranged on the inner side wall of the top wall of the drying room, a second spraying group arranged on the inner side wall of one long side and a third spraying group arranged on the inner side wall of the other long side; the first spraying group, the second spraying group and the third spraying group respectively comprise spraying pipes, first spray heads and second hydraulic cylinder groups, the spraying pipes are connected with the inner side wall in a sliding mode through T-shaped sliding rails along the long edge direction, and the spraying pipes are provided with a plurality of first spray heads distributed along the axial direction; the second hydraulic cylinder group is fixedly arranged on the inner side wall, and the telescopic shaft of the second hydraulic cylinder group is fixedly connected with the spray pipe and used for pushing the spray pipe to slide along the long edge direction of the drying room.

The first spraying group, the second spraying group and the third spraying group are identical in structure, water spraying humidification is respectively carried out from the top and from two sides, humidification is carried out from multiple aspects, the outer surface of wood is humidified as far as possible, and the possibility of drying cracking is reduced. First group, the second sprays group and the third sprays the group and all promote the shower through its second hydraulic cylinder group and make a round trip to slide along "T" style of calligraphy slide rail, and a plurality of shower nozzles that distribute on the shower atomize water, form water smoke after the atomizing, evenly spill on ligneous surface, both can keep the humidity of timber surface, can avoid humidity too big again and influence drying efficiency.

Preferably, the number of the spraying pipes of the first spraying group, the second spraying group and the third spraying group is two, the hydraulic cylinders of the second hydraulic cylinder group are double-output-shaft hydraulic cylinders, and two ends of a telescopic shaft of each double-output-shaft hydraulic cylinder are respectively fixedly connected with the two spraying pipes.

Two spraying pipes are driven by a group of double-output-shaft hydraulic cylinders at the same time, and the two spraying pipes spray at the same time, compared with the spraying of a single group of spraying pipes, the moving distance of the double spraying pipes is reduced by half, and the time required by spraying is reduced by half, so that the spraying efficiency is improved.

Preferably, the spraying system further comprises a universal mechanical arm, the upper end of the universal mechanical arm is connected to the inner side wall of the top wall of the drying room in a sliding mode through an electric sliding rail, and the lower end of the universal mechanical arm is provided with a plurality of second spray heads; the two universal mechanical arms are distributed on two sides of the first spraying group; and electromagnetic valves are arranged between each first spray head and the corresponding spray pipe and between each second spray head.

The special wood, namely the valuable wood, is often dried singly or in multiple pieces, and is not sprayed in a large number of stacks. In this case, the universal mechanical arm is required to be used for accurately spraying the wood so as to ensure that the surface of the wood is uniformly humidified, and the possibility of cracking is greatly reduced.

Preferably, the spraying device further comprises a water supply system and a hydraulic system, wherein the water supply system is respectively in conduction connection with the first spraying group, the second spraying group, the third spraying group and all the second spray heads; and the hydraulic system is respectively connected with the first hydraulic cylinder group and the second hydraulic cylinder group in a conduction manner.

The water supply system can be selected from tap water or single water supply equipment capable of improving certain water pressure according to actual conditions. The hydraulic system is selected as a hydraulic station, and the first hydraulic cylinder group and the second hydraulic cylinder group are subjected to telescopic control while pressure is provided for the first hydraulic cylinder group and the second hydraulic cylinder group.

Preferably, the system further comprises a control system, wherein the control system comprises a three-dimensional laser scanner, a human-computer exchange interface and a signal processor; the inner side wall of the top wall of the drying room and the inner side walls of the two long sides are respectively provided with two three-dimensional laser scanners, and the inner side wall of one short side of the drying room and the inner side wall of the automatic door are respectively provided with one three-dimensional laser scanner; the human-computer exchange interface and the signal processor are both arranged on the outer side wall of the drying room, the input end of the signal processor is electrically connected with all the three-dimensional laser scanners respectively, and the output end of the signal processor is electrically connected with the human-computer exchange interface, the hydraulic system, the automatic door, the travelling crane, all the electric slide rails, all the electromagnetic valves and two universal mechanical arms respectively.

The equipment belongs to full-automatic drying equipment, parameters are set on a man-machine exchange interface before drying, and then the signal processor controls the spraying strength, the spraying times and the interval time according to the set parameters. In addition, this equipment still can carry out corresponding spraying to the timber of different grade type, especially the stoving of rare timber spouts wet demand, consequently this equipment can satisfy different ligneous stoving demands, improves the practicality greatly.

The invention also provides a drying method, which is applied to the air source heat pump drying device and comprises the following steps:

the method comprises the following steps: the signal processor controls the automatic door to be opened and controls the timber to be driven into the second section of track from the first section of track, and the timber is manually installed on the timber driving vehicle; the signal processor controls the travelling crane to drive into the first section of track from the second section of track and controls the automatic door to close;

step two; selecting a drying or drying and humidifying program through a man-machine exchange interface;

step three: if the drying program is selected, further setting the drying time through a man-machine exchange interface, and after the drying time is finished, controlling an automatic door to be opened and controlling a travelling crane to enter a second section of track from a first section of track by a signal processor, and finishing the drying;

step four: if the drying and humidifying program is selected in the step two, further setting the humidifying intensity, the humidifying times and the interval time between two times of humidifying through a man-machine exchange interface, and finally selecting special wood or common wood;

step five: if common wood is selected in the fourth step, the signal processor controls the opening degrees of the electromagnetic valves of the first spraying group, the second spraying group and the third spraying group according to the set humidifying strength to humidify, in addition, the signal processor controls the hydraulic system according to the set humidifying times and the interval time of humidifying every two times, so that the times of driving the spraying pipes to move and the interval time of moving every two times of the second hydraulic cylinder groups of the first spraying group, the second spraying group and the third spraying group are controlled, until the drying time is finished, the signal processor controls the automatic door to open and controls the travelling crane to drive into the second section of track from the first section of track, and the drying is finished;

step six: if special wood is selected in the fourth step, the signal processor controls all three-dimensional laser scanners to scan and obtain three-dimensional image data of the wood, the signal processor controls the two universal mechanical arms to enable the second spray heads at the lower ends of the two universal mechanical arms to scan along the outer surface of the wood according to the three-dimensional image data, the signal processor controls the electric slide rail to run according to the rotation conditions of the two universal mechanical arms, so that the two universal mechanical arms complete the scanning of the outer surface of the whole wood, and if the lower ends of the two universal mechanical arms cannot reach the lowest point of the wood, the signal processor controls the hydraulic system to enable the first hydraulic cylinder group to extend out to enable the loading plate to ascend;

step seven: and step six, while scanning, the signal processor controls the opening of all the electromagnetic valves of the two universal mechanical arms according to the set humidification strength, and controls the scanning times of the two universal mechanical arms and the interval time of every two times of scanning according to the set humidification times and the interval time of every two times of humidification until the drying time is finished, and the signal processor controls the automatic door to be opened and controls the travelling crane to enter the second section of track from the first section of track and the drying is finished.

The method has the beneficial effects that:

the method can meet the drying requirements of common wood and the drying and humidifying requirements of special wood. The method has the advantages that all-directional structural scanning is carried out on special wood, a three-dimensional model is built, the universal mechanical arm is used for spraying completely without dead angles, the outer surface of the wood is guaranteed to be wet, and the possibility of cracking of the wood is greatly reduced. In addition, the method realizes the automation of wood drying, can finish the automatic drying or drying and humidifying process of the wood only by setting parameters, obviously reduces the output of labor force and improves the drying efficiency compared with the traditional drying mode.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

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

fig. 2 is a schematic structural view of a drying room in the embodiment;

FIG. 3 is a schematic structural view of the universal robot arm and the electric slide rail in FIG. 2 after being hidden;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is an enlarged view taken at A in FIG. 4;

FIG. 6 is a schematic diagram of an open dehumidification architecture in accordance with the present embodiment;

fig. 7 is a schematic diagram of the closed dehumidification structure in the embodiment.

In the drawing, an air source heat pump dryer 1, a drying room 2, a compressor 3, a condenser 4, an expansion valve 5, an evaporator 6, an atomizing humidifier 7, a dehumidifying mechanism 8, a traveling crane 9, a base 10, a loading plate 11, a lifting column group 12, a first hydraulic cylinder group 13, a first spray group 14, a second spray group 15, a third spray group 16, a spray pipe 17, a first spray head 18, a second hydraulic cylinder group 19, a T-shaped slide rail 20, a universal mechanical arm 21, an electric slide rail 22, a second spray head 23, an electromagnetic valve 24, an electric cylinder 25, a three-dimensional laser scanner 26, a man-machine exchange interface 27, an automatic door 28, a first section of track 29, a second section of track 30, an air inlet duct 31, an air return duct 32 and an air chamber 33 are arranged.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

As shown in fig. 1, the present embodiment provides an air source heat pump drying device, which includes a drying room 2 and an air source heat pump dryer 1, where the drying room 2 is communicated between a heat source air inlet and a heat source air outlet of the air source heat pump dryer 1. The air source heat pump dryer 1 has the following specific mechanisms:

as shown in fig. 6, comprises a compressor 3, a condenser 4, an expansion valve 5 and an evaporator 6 which are communicated in sequence and form a circulation pipeline; the condenser 4 is provided with two openings for forming the heat source air inlet and the heat source air outlet. The condenser 4 is further provided with a dehumidifying mechanism 8 for discharging moisture from the air flow. Dehumidification mechanism 8 sets up in condenser 4's wind chamber 33, and dehumidification mechanism 8 is equipped with the new trend entry and the air exit with the atmosphere intercommunication, utilizes to introduce the outside air and dehumidifies the air of inside, and this kind of structure belongs to open dehumidification structure. However, the equipment can also not be communicated with the atmosphere, and the specific structure is as follows:

as shown in fig. 7, the evaporator 6 is connected in parallel with another evaporator 6, the evaporator 6 is connected in parallel and is located in the air chamber 33 of the condenser 4, and the cold air formed by the evaporator 6 dehumidifies the air flow of the drying room. The structure belongs to a closed dehumidification structure, and the closed dehumidification structure does not need to be provided with a dehumidification mechanism 8.

The working principle of the air source heat pump dryer 1 in this embodiment is as follows: the circulating pipeline is filled with a refrigerant, the refrigerant is continuously evaporated from the evaporator 6, the refrigerant is compressed by the compressor 3 and then flows through the condenser 4, heat formed by the condenser 4 is blown into the drying room 2 from a heat source air outlet through the air inlet duct, then the heat enters the air cavity 33 of the condenser 4 from the heat source air inlet through the air return duct to absorb the heat of the condenser 4, and then the heat is continuously sent into the drying room 2. While the refrigerant continues through the expansion valve 5 and into the evaporator 6, thereby continuing the thermodynamic cycle process. The equipment uses less electric energy to meet the drying requirement of the drying room 2, avoids pollution caused by burning coal, fuel oil or biomass and the like, and improves the protection to the environment. The air source heat pump dryer 1 has a temperature control function and a dehumidification function, and can accurately control the problems and humidity in the drying chamber, so that the drying degree is controlled.

As shown in fig. 2, in order to reduce labor output, achieve full-automatic drying and perform corresponding drying or drying and humidifying operations for different types of wood, the present embodiment further includes a control system, which includes a signal processor for controlling the automatic operation of the present apparatus. The signal processor adopts a PLC controller, and the operation is stable and reliable. The drying room further comprises a transportation mechanism, the transportation mechanism comprises a track and a travelling crane 9 travelling on the track, the track comprises a first section of track 29 installed in the drying room 2 and a second section of track 30 installed outside the drying room 2, and the first section of track 29 and the second section of track 30 can be butted and separated. The travelling crane 9 travels to the outside of the drying room 2 through the rail, the travelling crane 9 is completely exposed, the manual handling of the wood is avoided, the travelling crane 9 replaces manual handling, and the manual handling efficiency of the wood is improved. When not in use, the second track section 30 is stored without taking up too much space. When the drying room 2 is closed, the second section of track 30 can be moved away, so that the drying room 2 is prevented from being closed. When the travelling crane 9 needs to be moved out of the drying room 2, the second section of track 30 needs to be butted with the first section of track 29.

The concrete structure of the traveling crane 9 is as follows:

as shown in fig. 3 and 4, the traveling crane 9 includes a base 10, a loading plate 11, and a lifting mechanism; the roller of the base 10 rolls on the track, and the lifting mechanism is connected between the base 10 and the carrying plate 11; the lifting mechanism comprises a lifting column group 12 and a first hydraulic cylinder group 13, the lifting column group and the first hydraulic cylinder group 13 are both installed between the base 10 and the loading plate 11 along the vertical direction, and the loading plate 11 is lifted and lowered by the aid of the first hydraulic cylinder group 13 in a telescopic mode. When the wood on the carrying plate 11 is not much and is a precious wood, the carrying plate 11 needs to be lifted by the lifting mechanism to facilitate humidification.

The device also comprises a spraying system; the spraying system comprises a first spraying group 14 arranged on the inner side wall of the top wall of the drying room 2, a second spraying group 15 on the inner side wall of one long side and a third spraying group 16 on the inner side wall of the other long side; the first spraying group 14, the second spraying group 15 and the third spraying group 16 respectively comprise a spraying pipe 17, a first spray head 18 and a second hydraulic cylinder group 19, the spraying pipe 17 is connected with the inner side wall in a sliding mode through a T-shaped sliding rail 20 along the long side direction, and the spraying pipe 17 is provided with a plurality of first spray heads 18 distributed along the axial direction; the second hydraulic cylinder group 19 is fixedly arranged on the inner side wall, and the telescopic shaft of the second hydraulic cylinder group 19 is fixedly connected with the spray pipe 17 and used for pushing the spray pipe 17 to slide along the long side direction of the drying room 2. The number of the spraying pipes 17 of the first spraying group 14, the second spraying group 15 and the third spraying group 16 is two, the hydraulic cylinders of the second hydraulic cylinder group 19 are double-output-shaft hydraulic cylinders, and two ends of a telescopic shaft of each double-output-shaft hydraulic cylinder are fixedly connected with the two spraying pipes 17 respectively. Two spray pipes 17 are driven by a group of double-output-shaft hydraulic cylinders simultaneously, and the two spray pipes 17 spray simultaneously, compared with the single-group spray pipe 17, the moving distance of the double-spray pipe 17 is reduced by half, and the time required by spraying is reduced by half, so that the spraying efficiency is improved. The first spraying group 14, the second spraying group 15 and the third spraying group 16 are identical in structure, water spraying and humidifying are respectively carried out from the upper side and the two sides, humidification is carried out in multiple aspects, the outer side of the wood is humidified as far as possible, and the possibility of drying crack is reduced. First spray group 14, second spray group 15 and third spray group 16 and all promote shower 17 through its second hydraulic cylinder group 19 and make a round trip to slide along "T" style of calligraphy slide rail 20, and a plurality of shower nozzles that distribute on the shower 17 atomize water, form water smoke after the atomizing, evenly spill on ligneous surface, both can keep the humidity of timber surface, can avoid humidity too big again and influence drying efficiency.

As shown in fig. 5, in addition, the spraying system further comprises a universal mechanical arm 21, the upper end of the universal mechanical arm 21 is slidably connected to the inner side wall of the top wall of the drying room 2 through an electric slide rail 22, and the lower end is provided with a plurality of second nozzles 23; two universal mechanical arms 21 are arranged, and the two universal mechanical arms 21 are distributed on two sides of the first spraying group 14; electromagnetic valves 24 are arranged between each first spray head 18 and the corresponding spray pipe 17 and between each second spray head 23. The special wood, namely the valuable wood, is often dried singly or in multiple pieces, and is not sprayed in a large number of stacks. In this case, the universal mechanical arm 21 is required to spray the wood accurately, so as to ensure the uniform humidification of the wood surface, and greatly reduce the possibility of cracking.

The present embodiment further includes a water supply system, and the water supply system is respectively connected to the first spraying group 14, the second spraying group 15, the third spraying group 16, and all the second spraying heads 23 in a conduction manner. The water supply system can be selected from tap water or single water supply equipment capable of improving certain water pressure according to actual conditions. The water supply system provides uninterrupted constant-pressure water source, so that the spraying and humidifying are more uniform. In order to control the first hydraulic cylinder group 13 and the second hydraulic cylinder group 19, the present embodiment further includes a hydraulic system, where the hydraulic system is selected as a hydraulic station, and the hydraulic station provides pressure to the first hydraulic cylinder group 13 and the second hydraulic cylinder group 19 and controls extension and retraction of the first hydraulic cylinder group 13 and the second hydraulic cylinder group 19.

In addition, the drying room 2 is provided with an automatic door 28 which is turned upward. The automatic door 28 is provided with two electric cylinders 25, the cylinder seat of the electric cylinder 25 is hinged with the inner side wall of the drying room 2, the telescopic rod of the electric cylinder 25 is hinged with the automatic door 28, and the automatic door 28 is opened and closed by the telescopic action of the electric cylinder 25.

The control system also comprises a three-dimensional laser scanner 26 and a man-machine exchange interface 27, wherein the three-dimensional laser scanner 26 is specifically distributed as follows: the inside wall on two long limits of 2 roofs in stoving room, the inside wall on two long limits all is equipped with two three-dimensional laser scanner 26, and the inside wall of a minor face in stoving room 2 and automatically-controlled door 28 all are equipped with a three-dimensional laser scanner 26. Wherein the three-dimensional laser scanners 26 of the inner side wall of the top wall and the inner side walls of the two long sides are distributed on the two sides in the middle of the inner side walls, so that the scanning range is larger. Eight three-dimensional laser scanners 26 in all realize the no dead angle scanning of timber on driving 9. The human-machine interface 27 and the signal processor are both installed on the outer side wall of the drying room 2, the input end of the signal processor is electrically connected with all the three-dimensional laser scanners 26, and the output end of the signal processor is electrically connected with the human-machine interface 27, the hydraulic system, the two electric cylinders 25 of the automatic door 28, the traveling crane 9, all the electric slide rails 22, all the electromagnetic valves 24 and the two universal mechanical arms 21.

This embodiment still provides a simple humidification structure, and concrete structure is as follows: the heat source air inlet is communicated with the top wall of the drying room through an air inlet duct 31, and an atomization humidifier 7 is arranged at the inlet of the air inlet duct 31. The heat source air outlet is communicated with the side wall of the drying room through an air return duct 32. When the wood needs to be humidified, the atomization humidifier 7 sends water mist, and the water mist enters the drying room through the airflow of the air inlet duct and humidifies the outer surface of the wood. The humidifying mode is simple, the production and manufacturing cost is low, and the control of the production cost is facilitated.

The drying method using the equipment comprises the following steps:

the method comprises the following steps: the signal processor controls the automatic door to be opened and controls the timber to be driven into the second section of track from the first section of track, and the timber is manually installed on the timber driving vehicle; the signal processor controls the travelling crane to drive into the first section of track from the second section of track and controls the automatic door to close;

step two; selecting a drying or drying and humidifying program through a man-machine exchange interface;

step three: if the drying program is selected, further setting the drying time through a man-machine exchange interface, and after the drying time is finished, controlling an automatic door to be opened and controlling a travelling crane to enter a second section of track from a first section of track by a signal processor, and finishing the drying;

step four: if the drying and humidifying program is selected in the step two, further setting the humidifying intensity, the humidifying times and the interval time between two times of humidifying through a man-machine exchange interface, and finally selecting special wood or common wood;

step five: if common wood is selected in the fourth step, the signal processor controls the opening degrees of the electromagnetic valves of the first spraying group, the second spraying group and the third spraying group according to the set humidifying strength to humidify, in addition, the signal processor controls the hydraulic system according to the set humidifying times and the interval time of humidifying every two times, so that the times of driving the spraying pipes to move and the interval time of moving every two times of the second hydraulic cylinder groups of the first spraying group, the second spraying group and the third spraying group are controlled, until the drying time is finished, the signal processor controls the automatic door to open and controls the travelling crane to drive into the second section of track from the first section of track, and the drying is finished;

step six: if special wood is selected in the fourth step, the signal processor controls all three-dimensional laser scanners to scan and obtain three-dimensional image data of the wood, the signal processor controls the two universal mechanical arms to enable the second spray heads at the lower ends of the two universal mechanical arms to scan along the outer surface of the wood according to the three-dimensional image data, the signal processor controls the electric slide rail to run according to the rotation conditions of the two universal mechanical arms, so that the two universal mechanical arms complete the scanning of the outer surface of the whole wood, and if the lower ends of the two universal mechanical arms cannot reach the lowest point of the wood, the signal processor controls the hydraulic system to enable the first hydraulic cylinder group to extend out to enable the loading plate to ascend;

step seven: and step six, while scanning, the signal processor controls the opening of all the electromagnetic valves of the two universal mechanical arms according to the set humidification strength, and controls the scanning times of the two universal mechanical arms and the interval time of every two times of scanning according to the set humidification times and the interval time of every two times of humidification until the drying time is finished, and the signal processor controls the automatic door to be opened and controls the travelling crane to enter the second section of track from the first section of track and the drying is finished.

The equipment belongs to full-automatic drying equipment, parameters are set on a man-machine exchange interface before drying, and then the signal processor controls the spraying strength, the spraying times and the interval time according to the set parameters. The drying requirement of common wood can be met, and the drying and humidifying requirements of special wood can also be met. The method has the advantages that all-directional structural scanning is carried out on special wood, a three-dimensional model is built, the universal mechanical arm is used for spraying completely without dead angles, the outer surface of the wood is guaranteed to be wet, and the possibility of cracking of the wood is greatly reduced. In addition, the automatic drying or drying and humidifying process of the wood can be completed only by setting parameters, and compared with the traditional drying mode, the automatic drying or drying and humidifying process of the wood has the advantages that the labor force output is obviously reduced, and the drying efficiency is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (3)

1. An air source heat pump drying device comprises a drying room and an air source heat pump dryer, wherein the drying room is communicated between a heat source air inlet and a heat source air outlet of the air source heat pump dryer through an air duct;

the method is characterized in that: the air source heat pump dryer comprises a compressor, a condenser, an expansion valve and an evaporator which are sequentially communicated and form a circulating pipeline; the condenser is provided with two openings for forming the heat source air inlet and the heat source air outlet; the condenser is also provided with a dehumidifying mechanism for discharging moisture in the air flow; the heat source air outlet is communicated with the top wall of the drying room through an air inlet duct, and an atomization humidifier is arranged at the inlet of the air inlet duct; the heat source air inlet is communicated with the side wall of the drying room through an air return duct; the drying room further comprises a conveying mechanism and an automatic door arranged on the side face of the drying room; the transportation mechanism comprises a track and a travelling crane travelling on the track, the track comprises a first section of track arranged in the drying room and a second section of track arranged outside the drying room, and the first section of track and the second section of track can be butted and separated;

the travelling crane comprises a base, a carrying plate and a lifting mechanism; the roller of the base rolls on the track, and the lifting mechanism is connected between the base and the carrying plate; the lifting mechanism comprises a lifting column group and a first hydraulic cylinder group, the lifting column group and the first hydraulic cylinder group are both arranged between the base and the carrying plate along the vertical direction, and the carrying plate is lifted and lowered by the extension and contraction of the first hydraulic cylinder group;

the device also comprises a spraying system; the spraying system comprises a first spraying group arranged on the inner side wall of the top wall of the drying room, a second spraying group arranged on the inner side wall of one long side and a third spraying group arranged on the inner side wall of the other long side; the first spraying group, the second spraying group and the third spraying group respectively comprise spraying pipes, first spray heads and second hydraulic cylinder groups, the spraying pipes are connected with the inner side wall in a sliding mode through T-shaped sliding rails along the long edge direction, and the spraying pipes are provided with a plurality of first spray heads distributed along the axial direction; the second hydraulic cylinder group is fixedly arranged on the inner side wall, and a telescopic shaft of the second hydraulic cylinder group is fixedly connected with the spray pipe and used for pushing the spray pipe to slide along the long side direction of the drying room; the spraying system also comprises a universal mechanical arm, the upper end of the universal mechanical arm is connected to the inner side wall of the top wall of the drying room in a sliding mode through an electric sliding rail, and the lower end of the universal mechanical arm is provided with a plurality of second spray heads; the two universal mechanical arms are distributed on two sides of the first spraying group; electromagnetic valves are arranged between each first spray head and the corresponding spray pipe and between each second spray head;

the water supply system is respectively communicated with the first spraying group, the second spraying group, the third spraying group and all the second spray heads; the hydraulic system is respectively connected with the first hydraulic cylinder group and the second hydraulic cylinder group in a conduction mode; the system also comprises a control system, wherein the control system comprises a three-dimensional laser scanner, a man-machine exchange interface and a signal processor; the inner side wall of the top wall of the drying room and the inner side walls of the two long sides are respectively provided with two three-dimensional laser scanners, and the inner side wall of one short side of the drying room and the inner side wall of the automatic door are respectively provided with one three-dimensional laser scanner; the human-computer exchange interface and the signal processor are both arranged on the outer side wall of the drying room, the input end of the signal processor is electrically connected with all the three-dimensional laser scanners respectively, and the output end of the signal processor is electrically connected with the human-computer exchange interface, the hydraulic system, the automatic door, the travelling crane, all the electric slide rails, all the electromagnetic valves and two universal mechanical arms respectively.

2. The air source heat pump drying device of claim 1, wherein: the spray pipes of the first spray group, the second spray group and the third spray group are respectively provided with two spray pipes, the hydraulic cylinders of the second hydraulic cylinder group are double-output-shaft hydraulic cylinders, and two ends of a telescopic shaft of each double-output-shaft hydraulic cylinder are respectively fixedly connected with the two spray pipes.

3. A drying method is characterized in that: the air source heat pump drying device applied to the claim 1 comprises the following steps:

the method comprises the following steps: the signal processor controls the automatic door to be opened and controls the timber to be driven into the second section of track from the first section of track, and the timber is manually installed on the timber driving vehicle; the signal processor controls the travelling crane to drive into the first section of track from the second section of track and controls the automatic door to close;

step two; selecting a drying or drying and humidifying program through a man-machine exchange interface;

step three: if the drying program is selected, further setting the drying time through a man-machine exchange interface, and after the drying time is finished, controlling an automatic door to be opened and controlling a travelling crane to enter a second section of track from a first section of track by a signal processor, and finishing the drying;

step four: if the drying and humidifying program is selected in the step two, further setting the humidifying intensity, the humidifying times and the interval time between two times of humidifying through a man-machine exchange interface, and finally selecting special wood or common wood;

step five: if common wood is selected in the fourth step, the signal processor controls the opening degrees of the electromagnetic valves of the first spraying group, the second spraying group and the third spraying group according to the set humidifying strength to humidify, in addition, the signal processor controls the hydraulic system according to the set humidifying times and the interval time of humidifying every two times, so that the times of driving the spraying pipes to move and the interval time of moving every two times of the second hydraulic cylinder groups of the first spraying group, the second spraying group and the third spraying group are controlled, until the drying time is finished, the signal processor controls the automatic door to open and controls the travelling crane to drive into the second section of track from the first section of track, and the drying is finished;

step six: if special wood is selected in the fourth step, the signal processor controls all three-dimensional laser scanners to scan and obtain three-dimensional image data of the wood, the signal processor controls the two universal mechanical arms to enable the second spray heads at the lower ends of the two universal mechanical arms to scan along the outer surface of the wood according to the three-dimensional image data, the signal processor controls the electric slide rail to run according to the rotation conditions of the two universal mechanical arms, so that the two universal mechanical arms complete the scanning of the outer surface of the whole wood, and if the lower ends of the two universal mechanical arms cannot reach the lowest point of the wood, the signal processor controls the hydraulic system to enable the first hydraulic cylinder group to extend out to enable the loading plate to ascend;

step seven: and step six, while scanning, the signal processor controls the opening of all the electromagnetic valves of the two universal mechanical arms according to the set humidification strength, and controls the scanning times of the two universal mechanical arms and the interval time of every two times of scanning according to the set humidification times and the interval time of every two times of humidification until the drying time is finished, and the signal processor controls the automatic door to be opened and controls the travelling crane to enter the second section of track from the first section of track and the drying is finished.

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