CN114001537A

CN114001537A - Agricultural product dryer with air energy heat pump

Info

Publication number: CN114001537A
Application number: CN202111439201.8A
Authority: CN
Inventors: 徐枝泉
Original assignee: Guangdong Bilang Energy Saving Equipment Co ltd
Current assignee: Guangdong Bilang Energy Saving Equipment Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-02-01
Anticipated expiration: 2041-11-30
Also published as: CN114001537B

Abstract

The invention discloses an air energy heat pump agricultural product dryer, which comprises: the drying box comprises a shell, a drying box body and a drying box body, wherein an opening is formed in the top of the shell, and the drying box body is provided with an open top on one side inside the shell; the heat exchange unit is arranged in the shell and comprises a condensing pipe, and the condensing pipe is embedded in the side wall of the drying box; the drying and rotating unit comprises rotating shafts, a drying box, a mesh cover and a speed reduction power assembly, wherein through holes are uniformly formed in the drying box, the mesh cover is clamped on the drying box, the left end and the right end of the drying box are respectively and fixedly provided with the rotating shafts, the two rotating shafts are respectively and rotatably connected with the two ends of the drying box, and the end part of one rotating shaft is connected with the speed reduction power assembly; and a dehumidifying unit installed in the housing and connected to the drying box. Can dry by the mode of heat pump, can avoid drying temperature too high, can ensure simultaneously that the drying is even to can be timely discharge moisture, can accelerate drying rate, ensure drying quality.

Description

Agricultural product dryer with air energy heat pump

Technical Field

The invention relates to the technical field of drying equipment, in particular to an air energy heat pump agricultural product dryer.

Background

A heat pump is a thermal energy device that can extract heat from a low temperature heat source and utilize it at a higher temperature as useful heat energy.

At present, many materials such as pepper, sausage and sausage are not suitable for a high-temperature dryer, the materials are easy to damage and deteriorate to reduce the quality when being dried under a high-temperature condition, and the existing air energy heat pump agricultural product dryer is easy to be unevenly heated to influence the quality when being dried.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides an air energy heat pump agricultural product dryer which can dry in a heat pump mode, avoid overhigh drying temperature, ensure uniform drying, discharge moisture in time, accelerate drying speed, ensure drying quality and effectively solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: air energy heat pump agricultural product drying-machine includes:

the drying box comprises a shell, a drying box body and a drying box body, wherein an opening is formed in the top of the shell, and the drying box body is provided with an open top on one side inside the shell;

the heat exchange unit is arranged in the shell and comprises a condensing pipe, and the condensing pipe is embedded in the side wall of the drying box;

the drying and rotating unit comprises rotating shafts, a drying box, a mesh cover and a speed reduction power assembly, wherein through holes are uniformly formed in the drying box, the mesh cover is clamped on the drying box, the left end and the right end of the drying box are respectively and fixedly provided with the rotating shafts, the two rotating shafts are respectively and rotatably connected with the two ends of the drying box, and the end part of one rotating shaft is connected with the speed reduction power assembly;

and a dehumidifying unit installed in the housing and connected to the drying box.

Be used for placing the dry material of needs in the drying box, then seal through the mesh lid, can make the condenser pipe intensification through heat energy exchange unit, thereby improve the temperature in the drying cabinet, can heat the drying to the material in the drying box through the through-hole, make the moisture evaporation in the material come out, speed reduction power component work can drive the pivot and rotate, can drive the drying box through the pivot and rotate, can make the material thermally equivalent in the drying box, avoid being heated inhomogeneous and lead to the material to warp or rotten, the dehumidification unit can blow to the drying cabinet, in time with the steam discharge that evaporates out, can accelerate the drying process.

Further, the heat energy exchange unit still includes compressor, evaporimeter and expansion valve, the one side of keeping away from the drying cabinet in the casing is equipped with the evaporimeter, the import of compressor is connected to the one end of evaporimeter, the one end of exit linkage condenser pipe of compressor, the other end of condenser pipe passes through the other end that the expansion valve connects the evaporimeter. Gaseous refrigerant in the evaporimeter is impressed into the condenser pipe through the compressor, makes the intraductal pressure of condenser rise, makes the refrigerant in the condenser pipe receive high pressure to influence and condense, and release heat energy heats the drying cabinet during condensation, and the liquid refrigerant of condensation passes through the expansion valve and progressively emits into the evaporimeter and accomplishes the circulation, and drying temperature can be controlled to this kind of mode, avoids drying temperature too high.

Further, the heat energy exchange unit still includes mounting box and protection network, the one side of keeping away from the drying cabinet in the casing is equipped with the mounting box of parcel evaporimeter, and the side of casing sets up the inside side of intercommunication mounting box and leads to the groove, the inslot is led to the side and is installed the protection network. The low temperature of avoiding the evaporimeter through the mounting box influences the heating drying effect of the condenser pipe in the casing, can avoid outside debris to pass through the groove through the side through and enter into the mounting box through the protection network.

Further, the speed reduction power assembly includes motor, reduction gear and driving gear, the end fixing of dry box has the motor, the output shaft of motor driving gear, the tip of one of them pivot extends to the tip outside of dry box and is connected with reduction gear, reduction gear and driving gear meshing are connected. The motor work drives the driving gear and rotates, changes the drive ratio through the meshing with reduction gear, reduces the rotational speed, avoids the motor to drive dry box and rotates too fast, ensures that dry box steady rotation, avoids the mesh lid on the dry box to break away from.

Further, the dehumidification unit includes that draft tube, air-blower, breather hose, connector, outlet duct, gas hood and installation lead to the groove, four installation lead to grooves have been seted up to the side symmetries around the bottom of drying cabinet, and the interior interlude of installation logical inslot is equipped with the outlet duct, the outlet duct is located the one end of drying cabinet and installs the gas hood, the outlet duct is located the outer one end of drying cabinet and passes through the one end that the connector is connected breather hose, and the top of draft tube is connected to four breather hose's the other end, install the air-blower in the draft tube, the inner wall at the casing is fixed to the draft tube. The air blower works to blow air flow in the ventilating duct upwards, so that air is filled into the air outlet pipe through the ventilating hose and the connector, then air is blown to the bottom in the drying box through the air outlet cover, and therefore water vapor generated by heating materials in the drying box is blown out upwards, and moisture in the drying box is discharged timely.

Further, the dehumidification unit still includes fixed clamp, dust filtration screen cloth and the otter board that admits air, and the bottom air intake of draft tube is fixed with the dust filtration screen cloth through fixed clamp, the bottom position that the casing corresponds the draft tube has seted up the logical groove of air inlet, the logical inslot of air inlet is installed and is admitted air the otter board. Through the fixed dust screen cloth that strains of fixed clamp, avoid the dust to enter into the drying cabinet after entering into the draft tube along with the air current in, avoid needing dry material to be infected with the dust, the otter board of admitting air can avoid the logical groove of air inlet to have debris to enter into the casing.

Further, the drying oven further comprises an angle adjusting unit, wherein the angle adjusting unit is installed at the bottom of the drying oven and is connected with the air outlet pipe. The angle adjustment unit can make the direction of blowing of outlet duct constantly change, improves the effect of blowing the hydrofuge.

Further, the angular adjustment unit includes adjustment axle, torsional spring, connects knee, gyro wheel, adjusting lever, electric putter and installation knee, the middle part both sides of outlet duct are fixed with the adjustment axle respectively, the adjustment axle rotates with the installation and is connected through the inslot side, the torsional spring has been cup jointed on the adjustment axle, the outlet duct is connected to logical inboard and the other end of installation groove to torsional spring one end connection, the outlet duct is located the outer one end bottom of drying cabinet and connects the one end of connecting the knee, the other end of connecting the knee is located the downside middle part of drying cabinet and rotates and be connected with the gyro wheel, the fixed horizontal electric putter one end of bottom one side of drying cabinet through the installation knee, the adjusting lever is connected to electric putter's the other end, the front and back side of adjusting lever is wavy, and the front and back side of adjusting lever respectively with the gyro wheel roll connection that corresponds.

The installation knee is used for installing electric putter, electric putter is flexible can push away the adjusting lever and come and go the activity about, because the torsion effect of torsional spring, can drive the connection knee of outlet duct bottom and press to the adjusting lever, the side of the contact adjusting lever that makes the gyro wheel last, because the wavy form of side around the adjusting lever, can make the connection knee push away the outlet duct for the adjusting shaft with certain angle reciprocating motion, thereby make the reciprocal change from top to bottom of the orientation of giving vent to anger cover, constantly change the direction of blowing, can improve the effect of hydrofuge gas.

Compared with the prior art, the invention has the beneficial effects that: this air energy heat pump agricultural product drying-machine has following benefit: 1. the drying box is used for placing materials to be dried, then the materials are sealed through the mesh cover, the condensation pipe can be heated through the heat exchange unit, so that the temperature in the drying box is increased, the materials in the drying box can be heated and dried through the through hole, and moisture in the materials is evaporated; 2. the speed reduction power assembly can drive the rotating shaft to rotate when working, the drying box can be driven to rotate through the rotating shaft, materials in the drying box can be uniformly heated, the materials are prevented from being deformed or deteriorated due to nonuniform heating, the dehumidifying unit can blow air into the drying box, evaporated water vapor is discharged in time, and the drying process can be accelerated; 3. can dry by the mode of heat pump, can avoid drying temperature too high, can ensure simultaneously that the drying is even to can be timely discharge moisture, can accelerate drying rate, ensure drying quality.

Drawings

Fig. 1 is a schematic structural diagram of an air energy heat pump agricultural product dryer of the invention.

Fig. 2 is a schematic structural diagram of the side surface of the agricultural product dryer with the air energy heat pump of the invention.

Fig. 3 is a schematic top view of the inside of the agricultural product dryer with the air energy heat pump of the present invention.

Fig. 4 is a schematic side sectional view of the agricultural product dryer with the air energy heat pump of the present invention.

Fig. 5 is a schematic view of a part of an enlarged structure at a point a in fig. 4 of the air-source heat pump agricultural product dryer of the present invention.

Fig. 6 is a schematic view of the internal structure of the air-source heat pump agricultural product dryer of the present invention.

In the figure: 1 shell, 2 cover plates, 3 take-and-place ports, 4 drying boxes, 5 heat exchange units, 51 compressors, 52 evaporators, 53 expansion valves, 54 condensation pipes, 55 mounting boxes, 56 protective nets, 6 drying rotary units, 61 rotating shafts, 62 drying boxes, 63 mesh covers, 64 motors, 65 reduction gears, 66 driving gears, 7 dehumidifying units, 71 ventilating ducts, 72 air blowers, 73 ventilating hoses, 74 connectors, 75 air outlet pipes, 76 air outlet hoods, 77 mounting through grooves, 78 fixing clamps, 79 dust filtering meshes, 710 air inlet mesh plates, 8 angle adjusting units, 81 adjusting shafts, 82 torsion springs, 83 connecting bent rods, 84 rollers, 85 adjusting rods, 86 electric push rods, 87 mounting bent rods, 9 debris collecting assemblies, 91 collecting trays, 92 baffles, 93 push-and-pull handles and 10 mounting racks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the first embodiment, please refer to fig. 1 to 6, the present embodiment provides a technical solution: air energy heat pump agricultural product drying-machine includes:

the drying device comprises a shell 1, a drying box 4 with an open top is arranged on one side in the shell 1, a mounting frame 10 is arranged in the shell 1, the mounting frame 10 is used for supporting the drying box 4, a cover plate 2 is arranged on the opening in the top of the shell 1, and a taking and placing opening 3 corresponding to the drying box 4 is formed in the cover plate 2 and used for taking materials to be dried in the drying box 4;

the heat energy exchange unit 5 is arranged in the shell 1, the heat energy exchange unit 5 comprises a condensing pipe 54, and the condensing pipe 54 is embedded in the side wall of the drying box 4;

the heat energy exchange unit 5 further comprises a compressor 51, an evaporator 52 and an expansion valve 53, wherein the evaporator 52 is arranged on one side of the shell 1 far away from the drying box 4, one end of the evaporator 52 is connected with an inlet of the compressor 51, an outlet of the compressor 51 is connected with one end of a condensation pipe 54, and the other end of the condensation pipe 54 is connected with the other end of the evaporator 52 through the expansion valve 53. The gaseous refrigerant in the evaporator 52 is pressed into the condenser pipe 54 through the compressor 51, so that the pressure in the condenser pipe 54 is increased, the refrigerant in the condenser pipe 54 is condensed under the influence of high pressure, the drying box 4 is heated by releasing heat energy during condensation, and the condensed liquid refrigerant is gradually discharged into the evaporator 52 through the expansion valve 53 to complete circulation.

The heat energy exchange unit 5 further comprises a mounting box 55 and a protective net 56, the mounting box 55 wrapping the evaporator 52 is arranged on one side of the casing 1 far away from the drying box 4, a side through groove communicated with the inside of the mounting box 55 is formed in the side of the casing 1, and the protective net 56 is arranged in the side through groove. The mounting box 55 prevents the low temperature of the evaporator 52 from affecting the heating and drying effect of the condenser pipe 54 in the housing 1, and the protective net 56 prevents external impurities from entering the mounting box 55 through the side through groove.

The drying and rotating unit 6 comprises rotating shafts 61, a drying box 62, a mesh cover 63 and a speed reduction power assembly, through holes are uniformly formed in the drying box 62, the mesh cover 63 is clamped on the drying box 62, the rotating shafts 61 are respectively fixed at the left end and the right end of the drying box 62, the two rotating shafts 61 are respectively in rotating connection with the two ends of the drying box 4, and the end part of one rotating shaft 61 is connected with the speed reduction power assembly;

the speed reduction power assembly comprises a motor 64, a speed reduction gear 65 and a driving gear 66, the motor 64 is fixed at the end part of the drying box 62, an output shaft of the motor 64 is connected with the driving gear 66, the end part of one rotating shaft 61 extends to the outer side of the end part of the drying box 62 and is connected with the speed reduction gear 65, and the speed reduction gear 65 is in meshed connection with the driving gear 66. The motor 64 works to drive the driving gear 66 to rotate, the transmission ratio is changed through meshing with the reduction gear 65, the rotating speed is reduced, the motor 64 is prevented from driving the drying box 62 to rotate too fast, the drying box 62 is ensured to rotate stably, and the mesh cover 63 on the drying box 62 is prevented from being separated.

And a dehumidifying unit 7 installed in the case 1 and connected to the drying cabinet 4.

Dehumidification unit 7 includes draft tube 71, air-blower 72, breather hose 73, connector 74, outlet duct 75, go out the radome 76 and install logical groove 77, four installation logical grooves 77 have been seted up to the side symmetry altogether around the bottom of drying cabinet 4, it is equipped with outlet duct 75 to alternate in the logical groove 77 to install, outlet duct 75 is located the one end of drying cabinet 4 and installs radome 76, the one end that connector 74 connection breather hose 73 was passed through to the one end that outlet duct 75 is located outside the drying cabinet 4, the top of draft tube 71 is connected to the other end of four breather hoses 73, install air-blower 72 in the draft tube 71, draft tube 71 is fixed at the inner wall of casing 1. The blower 72 is operated to blow the air in the funnel 71 upward, so that air is supplied into the air outlet pipe 75 through the air hose 73 and the connector 74, and then air is blown toward the bottom of the drying box 4 through the air outlet cover 76, so that moisture generated from the material heated in the drying box 4 is blown upward, and moisture in the drying box 4 is discharged in time.

Dehumidification unit 7 still includes fixed clamp 78, dust filter screen cloth 79 and the otter board 710 that admits air, and the bottom air intake of draft tube 71 is fixed with dust filter screen cloth 79 through fixed clamp 78, and casing 1 corresponds the bottom position of draft tube 71 and has seted up logical groove of air inlet, and the logical inslot of air inlet installs the otter board 710 that admits air. The dust filtering mesh cloth 79 is fixed through the fixing clamp 78, so that dust is prevented from entering the drying box 4 after entering the ventilating duct 71 along with air flow, the material needing drying is prevented from being contaminated by dust, and the air inlet mesh plate 710 can prevent sundries from entering the shell 1 from the air inlet through groove.

Be used for placing the dry material of needs in the drying box 62, then seal through mesh lid 63, can make condenser pipe 54 intensification through heat energy exchange unit 5, thereby improve the temperature in the drying cabinet 4, can heat the drying to the material in the drying box 62 through the through-hole, make the moisture evaporation in the material come out, speed reduction power component work can drive pivot 61 and rotate, can drive drying box 62 through pivot 61 and rotate, can make the material thermally equivalent in the drying box 62, avoid being heated inhomogeneous and lead to the material to warp or rotten, dehumidification unit 7 can blow to in the drying cabinet 4, in time discharge the steam that evaporates out, can accelerate the drying process.

In the second embodiment, referring to fig. 4-6, the second embodiment provides a technical solution: the present embodiment is substantially the same as the above embodiments, except that:

and an angle adjusting unit 8, wherein the angle adjusting unit 8 is installed at the bottom of the drying box 4 and is connected with the air outlet pipe 75. The angle adjusting unit 8 can continuously change the blowing direction of the air outlet pipe 75, and improve the effect of blowing and dehumidifying.

The angle adjustment unit 8 comprises an adjustment shaft 81, a torsion spring 82, and a connecting curved rod 83, the roller 84, the adjusting rod 85, the electric push rod 86 and the installation knee 87, adjusting shafts 81 are fixed on two sides of the middle of the air outlet pipe 75 respectively, the adjusting shafts 81 are rotatably connected with the inner side of the installation through groove 77, a torsion spring 82 is sleeved on the adjusting shafts 81, one end of the torsion spring 82 is connected with the inner side of the installation through groove 77, the other end of the torsion spring is connected with the air outlet pipe 75, the air outlet pipe 75 is located at the bottom of the outer end of the drying box 4, one end of the air outlet pipe 83 is connected with the bottom of the drying box 4, the other end of the air outlet pipe 83 is located in the middle of the lower side of the drying box 4 and is rotatably connected with the roller 84, one end of the transverse electric push rod 86 is fixed on one side of the bottom of the drying box 4 through the installation knee 87, the other end of the electric push rod 86 is connected with the adjusting rod 85, the front side and the rear side of the adjusting rod 85 are both wavy, and the front side of the adjusting rod 85 is respectively connected with the corresponding roller 84 in a rolling manner.

The installation knee 87 is used for installing the electric push rod 86, the electric push rod 86 can push the adjusting rod 85 to move back and forth left and right due to the stretching of the torsion spring 82, the connecting knee 83 at the bottom of the air outlet pipe 75 can be driven to press the adjusting rod 85 due to the torsion action of the torsion spring 82, the roller 84 is enabled to continuously contact with the side surface of the adjusting rod 85, due to the wavy form of the front side and the rear side of the adjusting rod 85, the connecting knee 83 can push the air outlet pipe 75 to move back and forth at a certain angle relative to the adjusting shaft 81, the orientation of the air outlet cover 76 is enabled to change back and forth up, the blowing direction is constantly changed, and the effect of moisture exhaust can be improved.

In the third embodiment, referring to fig. 2, the present embodiment provides a technical solution: the present embodiment is substantially the same as the above embodiments, except that:

still include piece collection subassembly 9, piece collection subassembly 9 includes collection tray 91, baffle 92 and push-and-pull handle 93, the side that the bottom of drying cabinet 4 is close to casing 1 lateral wall has been seted up and has been collected logical groove, and casing 1 lateral wall has also been seted up and has been corresponded the outer logical groove of collecting logical groove, it is equipped with collection tray 91 with outer logical inslot to collect logical groove, the baffle 92 that blocks outer logical groove is installed to the tip of collecting tray 91, push-and-pull handle 93 is installed in baffle 92's the outside, can collect the residue that dry material dropped through collecting tray 91, baffle 92 can block and collect logical groove and outer logical groove, ensure the leakproofness of drying cabinet 4 bottom in the drying process, push-and-pull handle 93 makes things convenient for the push-and-pull to collect tray 91.

It should be noted that the input terminals of the compressor 51, the motor 64, the blower 72, and the electric push rod 86 disclosed in the above embodiments are all electrically connected to the output terminal of the external power source through the control switch set, the types of the above electrical components are selected by those skilled in the art according to the actual use scenario, and the control switch set controls the compressor 51, the motor 64, the blower 72, and the electric push rod 86 to work by the method commonly used in the prior art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Air energy heat pump agricultural product drying-machine which characterized in that includes:

the drying device comprises a shell (1), wherein an opening is formed in the top of the shell (1), and a drying box (4) with an open top is arranged on one side inside the shell (1);

the heat energy exchange unit (5) is arranged in the shell (1), the heat energy exchange unit (5) comprises a condensing pipe (54), and the condensing pipe (54) is embedded in the side wall of the drying box (4);

the drying and rotating unit (6) comprises rotating shafts (61), drying boxes (62), mesh covers (63) and a speed reduction power assembly, through holes are uniformly formed in the drying boxes (62), the mesh covers (63) are clamped on the drying boxes (62), the rotating shafts (61) are respectively fixed at the left end and the right end of each drying box (62), the two rotating shafts (61) are respectively rotatably connected with the two ends of the drying box (4), and the end part of one rotating shaft (61) is connected with the speed reduction power assembly;

and a dehumidifying unit (7) which is installed in the housing (1) and connected to the drying box (4).

2. The air-energy heat pump agricultural product dryer of claim 1, wherein: the heat energy exchange unit (5) still includes compressor (51), evaporimeter (52) and expansion valve (53), one side of keeping away from drying cabinet (4) in casing (1) is equipped with evaporimeter (52), the import of compressor (51) is connected to the one end of evaporimeter (52), the one end of exit linkage condenser pipe (54) of compressor (51), the other end of condenser pipe (54) passes through the other end that expansion valve (53) connect evaporimeter (52).

3. The air-energy heat pump agricultural product dryer of claim 2, wherein: the heat energy exchange unit (5) further comprises a mounting box (55) and a protective net (56), one side of the shell (1) far away from the drying box (4) is provided with the mounting box (55) wrapping the evaporator (52), the side of the shell (1) is provided with a side through groove communicated with the inside of the mounting box (55), and the protective net (56) is installed in the side through groove.

4. The air-energy heat pump agricultural product dryer of claim 1, wherein: the speed reduction power assembly comprises a motor (64), a speed reduction gear (65) and a driving gear (66), the end of the drying box (62) is fixed with the motor (64), an output shaft of the motor (64) is connected with the driving gear (66), the end of one rotating shaft (61) extends to the outer side of the end of the drying box (62) and is connected with the speed reduction gear (65), and the speed reduction gear (65) is meshed with the driving gear (66).

5. The air-energy heat pump agricultural product dryer of claim 1, wherein: dehumidification unit (7) include draft tube (71), air-blower (72), breather hose (73), connector (74), outlet duct (75), venture (76) and installation through groove (77), four installation through grooves (77) have been seted up to the side symmetry altogether around the bottom of drying cabinet (4), and it is equipped with outlet duct (75) to alternate in the installation through groove (77), outlet duct (76) are installed to the one end that outlet duct (75) are located drying cabinet (4), the one end that connector (74) connection breather hose (73) is passed through to the outer one end that outlet duct (75) are located drying cabinet (4), and the top of draft tube (71) is connected to the other end of four breather hose (73), install air-blower (72) in draft tube (71), the inner wall at casing (1) is fixed in draft tube (71).

6. The air-energy heat pump agricultural product dryer of claim 5, wherein: dehumidification unit (7) still include fixed clamp (78), filter dust screen cloth (79) and admit air otter board (710), and the bottom air intake of draft tube (71) is fixed with filter dust screen cloth (79) through fixed clamp (78), the bottom position that casing (1) corresponds draft tube (71) has been seted up the air inlet and has been led to the groove, the air inlet leads to the inslot and installs the otter board (710) that admits air.

7. The air-energy heat pump agricultural product dryer of claim 5 or 6, wherein: the drying oven further comprises an angle adjusting unit (8), wherein the angle adjusting unit (8) is installed at the bottom of the drying oven (4) and is connected with the air outlet pipe (75).

8. The air-energy heat pump agricultural product dryer of claim 7, wherein: the angle adjusting unit (8) comprises an adjusting shaft (81), a torsion spring (82), a connecting bent rod (83), rollers (84), an adjusting rod (85), an electric push rod (86) and an installing bent rod (87), wherein the adjusting shaft (81) is respectively fixed on two sides of the middle part of the air outlet pipe (75), the adjusting shaft (81) is rotatably connected with the inner side of the installing through groove (77), the torsion spring (82) is sleeved on the adjusting shaft (81), one end of the torsion spring (82) is connected with the inner side of the installing through groove (77) and the other end of the torsion spring (82) is connected with the air outlet pipe (75), the bottom of one end of the air outlet pipe (75) outside the drying box (4) is connected with one end of the connecting bent rod (83), the other end of the connecting bent rod (83) is positioned in the middle of the lower side of the drying box (4) and is rotatably connected with the rollers (84), one side of the bottom of the drying box (4) is fixed with one end of the transverse electric push rod (86) through the installing bent rod (87), the other end of the electric push rod (86) is connected with an adjusting rod (85), the front side and the rear side of the adjusting rod (85) are both wavy, and the front side and the rear side of the adjusting rod (85) are respectively in rolling connection with the corresponding rollers (84).