CN114838580B - Air energy heat pump dryer - Google Patents
Air energy heat pump dryer Download PDFInfo
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- CN114838580B CN114838580B CN202210532883.5A CN202210532883A CN114838580B CN 114838580 B CN114838580 B CN 114838580B CN 202210532883 A CN202210532883 A CN 202210532883A CN 114838580 B CN114838580 B CN 114838580B
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- air
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- dryer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses an air energy heat pump dryer, which is characterized in that a main machine is arranged through a rack, and the interior space of the rack is divided into a plurality of mounting positions and different functional areas through a transverse mounting plate and a longitudinal mounting plate. An air heating unit is arranged above the transverse mounting plate, and an exhaust fan is arranged below the transverse mounting plate; an air inlet is formed above the rack, hot air generated by an air heating unit is downwards discharged by an exhaust fan and supplied to the drying equipment, and the air heating unit comprises an evaporator, a main condenser, a heat pump compressor, a liquid storage tank and a drying filter. The host is suitable for various drying equipment with different power consumption requirements, and can realize zone control and improve the energy-saving effect.
Description
Technical Field
The invention belongs to material dehydration and drying processing equipment, and particularly relates to an air energy heat pump dryer.
Background
The dehydration, dehumidification and drying of plants are a relatively common fruit and vegetable preservation technology, hot air is generated by drying equipment to accelerate the volatilization of plant moisture, the plants such as fruits and vegetables are promoted to be rapidly dehydrated and shaped at high temperature, and then long-term preservation and transportation are realized.
The air energy heat pump dryer is generally applied to a material drying room, the air energy heat pump dryer absorbs heat in air in the outside by using an evaporator, then the heat is sent into a compressor to be compressed into high-temperature and high-pressure gas, and the high-temperature and high-pressure gas is released into the drying room through a condenser to dry the material.
A dryer based on a heat pump technology utilizes the working principle of reverse Carnot circulation to absorb air heat energy in the environment, the air heat energy is lifted to a high-temperature heat energy refrigerant through a heat pump device, then a compressor does work to enable the high-temperature heat energy to be changed into high-temperature high-pressure gas, the temperature is as high as 80-115 ℃, a fan is utilized to enable the high-temperature circulation, the high-pressure gas is discharged into a drying room to form a hot air form, the high-temperature high-pressure gas continuously circulates in the drying room, moisture in materials is continuously planned to be evaporated, and the evaporated moisture is discharged by a moisture discharging system, so that the drying purpose is achieved.
The existing market mainly comprises a hot air dryer and a dehumidifying heat pump dryer, the principle of the dehumidifying heat pump dryer is that a refrigerating unit works to heat and dehumidify, and a set of refrigerating unit is arranged on one side in a box body. When the heat pump compressor works, refrigerant is cooled after passing through the condenser, the evaporator generates low temperature, hot air generated by the heat pump compressor can achieve the cooling effect, the fan blows hot air of the condenser to circulate in the box body, and the evaporator dehumidifies the hot air with moisture so as to achieve the effect of internal heat pump circulation dehumidification.
Disclosure of Invention
The invention aims to provide an air-source heat pump dryer, which realizes further optimization of the dryer structure, realizes energy conservation in the drying process and improves the material drying effect.
The technical scheme is as follows: the utility model provides an air-source heat pump drying-machine, includes the frame, the frame divides its inner space into a plurality of installation positions through horizontal installing frame and vertical installing frame, sets up air heat pump unit in the installation position, horizontal installing frame and the equal pull formula of vertical installing frame set up in the frame, the frame internal fixation condenser of horizontal installing frame, vertical installing frame is used for fixed evaporimeter, two-layer about the frame is separated into through horizontal installing frame, the frame top is equipped with air inlet grille, upper installation position sets up air heat pump unit, the lower floor sets up the exhaust fan, at the top of lower floor be provided with the electrical heating stick.
The air heat pump unit comprises a heat pump compressor, a liquid storage tank and a drying filter, wherein the heat pump compressor is used for converting gas in the evaporator into high-temperature high-pressure gas, the high-temperature high-pressure gas is transmitted to the condenser, the condenser discharges heat downwards, and the exhaust fan controls air flow to enter the drying room.
Furthermore, the lower end of the rack is connected with the base, the side edge of the base is I-shaped, the middle part of the base is provided with a lower baffle plate with a through groove, an exhaust cylinder is fixed on the lower baffle plate and internally provided with blades of an exhaust fan, and the exhaust fan is suspended and arranged on the lower part of the transverse installation frame.
A plurality of limiting pieces are distributed around the upper through groove of the lower baffle plate, and each limiting piece comprises a shell and an insert block arranged in the shell; the lateral wall of inserted block connects the horizontal pole, and the part cover that the horizontal pole is located the shell has the spring, leads to the protruding slot of offering on the wall along the groove with the inserted block adaptation, leads to the groove and passes through the fixed exhaust section of thick bamboo of locating part.
Furthermore, a temperature and humidity detector is arranged on the lower layer of the rack separated by the transverse mounting frame.
Furthermore, in the air heat pump dryer, the electric cabinet is arranged on the front side of the rack and comprises a first protective door and a second protective door, the first protective door is provided with an electric control panel, and one side of the first protective door is provided with a monitoring instrument.
For the supplementary stoving effect of better realization electrical heating, the electrical heating stick that the frame lower floor set up evenly arranges at the downside of horizontal installing frame, and sets up on the lateral wall all around including arranging.
In the air heat pump dryer, cabinet plates are arranged on the periphery of a rack, an air inlet grille is arranged at the top of the rack, and air is exhausted from the bottom of the rack through an air exhaust tube. A drain pipe of the evaporator is arranged in the frame, the drain pipe is fixed on the frame through a clamping sleeve, a protective pad is fixed in the clamping sleeve, and two through holes matched with the locking bolts with nuts are formed in the clamping sleeve; the clamping sleeve is provided with two through holes matched with the connecting bolt, the clamping sleeve is arranged at the top end of the base, and the base is provided with two screw holes matched with the connecting bolt.
Further, for the stoving demand of the room of drying under the different volumes of matching, among the air energy heat pump drying-machine, the installation position sets up two and more, corresponds air heat pump set and sets up two sets of and more than, and through the work of electric cabinet independent control air heat pump set.
Has the advantages that: compared with the prior art, the air heat pump dryer provided by the invention has the advantages that the transverse installation frame and the longitudinal installation frame are used for separating the installation positions, the independent arrangement of the air heat pump unit is realized, the independent control is further realized, the larger range that one dryer can be matched with the volume of a drying room is realized, the power and the heat output of the dryer are generally carried and matched according to the volume of the drying room in the conventional design, but the situation that one dryer is insufficient in power and the other dryer is excessive in power can be caused, the situation that materials in the drying room are placed thickly and the plant water content is larger can occur, the adaptive dryer works at a high load for a long time, the fault of overheat shutdown can occur, and the material drying effect is influenced. Secondly, the frame is used as a main frame, the transverse and longitudinal installation frames are arranged in a drawing mode, the bases are arranged separately and comprise air exhaust pipes and the like, the combined installation is convenient, the structure is more optimized, the conventional equipment mostly adopts an integrated fixed modular unit arrangement and is then integrally installed in a drying room for materials, great inconvenience exists in installation and transportation, particularly, the large-scale equipment is heavy, and an auxiliary external tool is needed for installation.
Drawings
Fig. 1 is a schematic view of an internal structure of an air heat pump dryer according to the present invention;
fig. 2 is an oblique view of an air heat pump dryer according to the present invention;
FIG. 3 is a schematic structural diagram of the position limiting element according to the present invention;
FIG. 4 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 3 in accordance with the present invention;
fig. 5 is a schematic structural view of the ferrule of the present invention.
Fig. 6 is a side view of an air heat pump dryer according to the present invention;
fig. 7 is a front view of an air heat pump dryer according to the present invention;
fig. 8 is a plan view of an air heat pump dryer according to the present invention.
In the figure: 1. a frame; 101 transversely installing a frame; 102 longitudinally installing a frame; 2. an installation position; 3. a condenser; 4. an evaporator; 5. a card sleeve; 50. a protective pad; 51. locking the bolt; 52. a connecting bolt; 6. a drain pipe; 7. a limiting member; 70. a housing; 71. a limit bolt; 72. a cross bar; 73. inserting a block; 74. a spring; 8. a through groove; 9. an exhaust duct; 10. a base; 11. an air intake grille; 12. an electrical control panel; 120. a second guard gate; 121. a first guard gate; 122. monitoring the instrument; 13. an electrical heating rod; 14. an air heat pump heating unit.
Detailed Description
In order to explain the technical solutions disclosed in the present invention in detail, the following description is further made with reference to the accompanying drawings and specific embodiments.
The stoving room is generally the enclosure space of setting up for the stoving material, and the material of drying includes fruit vegetables, flowers, medicinal herbs and meat, through drying, is favorable to long-time save. The structure of the present invention will be described in detail below by taking the chrysanthemum drying process as an example and the assembly of the air heat pump dryer of the present invention as an example.
The chrysanthemum can be used as a beverage, is generally stored in a drying mode, needs to be cleaned in time after being picked and then is sent to a drying room for drying, the drying time generally reaches about 3 days, and the factors mainly determining the time mainly comprise the heat output of a dryer and the water content of the chrysanthemum. Drying room, the thermal-insulated wall body panel concatenation of heat preservation that generally adopts the concatenation is built and is formed, the volume also can freely be built, according to the area that the chrysanthemum was planted, receive the volume and build, consequently, need join in marriage under the different capacity in drying room how big power energy consumption air heat pump drying-machine is the problem that a frequent needs to be solved, current stoving host computer, generally speaking have 1, 2 power consumption representations such as match, after the power energy consumption of drying-machine is good according to prior art matching, in the use, meet again that the chrysanthemum of treating drying is picked under the rainy or air damp and hot condition, the water content of chrysanthemum is bigger again, under the power of adaptation, can not realize quick moisture removal, the stoving time extension, and then the effect of drying is also not good, the burnt yellow phenomenon just appears in some chrysanthemum.
To solve the problem, the air-source heat pump dryer provided by the invention can be controlled by using different working states of a plurality of dryer groups, including electric heating assistance, the range of the drying capacity is further expanded, the assembly is more convenient to disassemble and assemble compared with the fixing equipment in the prior art, and the specific structure can be shown in fig. 1-8.
With reference to fig. 1, the air-source heat pump dryer of the present invention has a basic structure of a rack 1, wherein a frame is built by using a metal material, an internal space of the rack 1 is divided into a plurality of installation positions by a transverse installation frame 101 and a longitudinal installation frame 102, the transverse installation frame 101 is divided into an upper layer and a lower layer, the longitudinal installation frame 102 is further divided into installation positions 2 at the upper layer or the lower layer, and the installation positions 2 are used for installing an air heat pump unit 14.
After a plurality of installation positions 2 are formed in the frame 1, an air heat pump unit is arranged on the upper layer, each installation position 2 can be independently arranged, pipelines are well connected, and independent control is adopted, so that the frame 1 and the installation position 2 shown in the figure 1 are in a position structure, the size of the frame 1 can be further enlarged, the installation positions 2 are increased, and the like, and the drying room is suitable for a larger volume.
Further, for the horizontal installation frame 101 and the vertical installation frame 102, the horizontal installation frame 101 and the vertical installation frame 102 are installed on the rack 1 in a drawing manner, the horizontal installation frame 101 is used for fixing the condenser 3 in the frame, the vertical installation frame 102 is used for fixing the evaporator 4 in the frame, and for the evaporator and the condenser, the air heat energy technology is also the content that should be known to those skilled in the art, but in the present invention, it is worth noting that the condenser 3 is installed horizontally and the evaporator 4 is installed vertically. The condenser and the evaporator belong to heat exchangers, the working principle of the evaporator and the condenser is the same although the structural forms of the evaporator and the condenser are various, the evaporator and the condenser are both devices for exchanging heat with external media flowing through the surfaces of containers of the evaporator and the condenser, namely the evaporator and the condenser are the same in the aspect of influencing heat transfer. The condenser cools and liquefies the medium and releases heat to the outside; the evaporator absorbs heat and gasifies to absorb external heat, namely, the refrigerant is changed from a gaseous state to a liquid state, and is a condensation heat release process, and the internal pressure of the evaporator is generally high; the refrigerant in the evaporator changes from liquid state to gas state, and is an evaporation heat absorption process, and the internal pressure of the process is generally lower. In a dryer for heating and dehumidifying. In the invention, the upper layer is heated, air is introduced through the top air inlet grille 11 of the frame 1, an air blower can be arranged for air suction, the air suction comprises air circulation in the drying room and air sucked outside the drying room from the top, the air heat pump unit comprises a heat pump compressor, a liquid storage tank and a drying filter, the heat pump compressor is used for converting the air in the evaporator 4 into high-temperature high-pressure air which is transmitted to the condenser 3, the condenser 3 is used for discharging heat downwards, and the exhaust fan is used for controlling air flow to enter the drying room. The invention combines the effect of hot gas discharge at the lower part to set horizontal and vertical directions, and the installation is carried out through the inner frame of the horizontal installation frame 101 and the vertical installation frame 102, thereby achieving the purpose of separating the space position of the frame and avoiding the weight increment problem caused by adopting redundant plates, being lighter, after the evaporator 4 and the condenser 3 are arranged, the evaporator is directly pushed into the frame 1 to be connected with a refrigerant pipeline, and the position is locked, thus being more convenient to overhaul and replace. Moreover, the air heat pump unit can also be cooled to a certain extent. If waste water is discharged by air compression and dehumidification, the arrangement of the water discharge pipe 6 can be as shown in fig. 1.
For the fixing of the drain pipe 6, for the stability, as shown in fig. 1 and 5, the drain pipe 6 is sleeved with a clamping sleeve 5, a protective pad 50 is fixed in the clamping sleeve 5, the protective pad 50 is connected with the clamping sleeve 5 through an adhesive, two through holes matched with a locking bolt 51 with a nut are formed in the clamping sleeve 5, two through holes matched with a connecting bolt 52 are formed in the clamping sleeve 5, the clamping sleeve 5 is arranged at the top end of the base 10, and two screw holes matched with the connecting bolt 52 are formed in the base 10.
The lower floor of frame 1, horizontal installing frame 101 lower part to frame 1 is supplementary, hangs fixedly and is provided with the exhaust fan, including the motor and the impeller of usefulness of airing exhaust, proposes here, for realizing better effect, the air-out angle of exhaust fan is adjustable to an achievable mode, for the technical means that technical staff in the field can know, because of not influencing this embodiment and implementing, does not give unnecessary details here. The arrangement mode of the present embodiment can be as shown in fig. 2, and the auxiliary stabilizing structure of the rack 1 includes a reinforcing rib and a supporting rod.
The impeller controlled by the motor to rotate is located in the discharge cylinder 9, the impeller is assembled and arranged by the base 10 and then spliced, the base 10 is connected with the rack 1, the side edge of the impeller is I-shaped or groove-shaped as shown in figures 1 and 2, the I-shaped shape is more stable, the whole rack can be conveniently abutted to an installation position or a sliding groove in a drying room when being installed, or a pulley is arranged to facilitate moving operation, and the impeller can be pushed to be installed, is labor-saving and can be installed. The indoor space of the drying room is limited, and the operation is not easy to lift, carry or hoist. The middle part of the base 10 is provided with a lower baffle plate with a through groove 8, an exhaust cylinder 9 is fixed on the lower baffle plate, and blades of an exhaust fan are accommodated in the exhaust cylinder 9. During assembly, the base 10 is fixed, and the lower baffle plate provided with the discharge cylinder 9 is mounted on the base 10.
With regard to the fixing of the exhaust duct 9, as shown in fig. 3-4. A plurality of limiting pieces 7 are distributed around the upper through groove 8 of the lower baffle, and each limiting piece 7 comprises a shell 70 and an insertion block 73 arranged in the shell 70; the lateral wall of the insert block 73 is connected with a cross rod 72, a spring 74 is sleeved on the part of the cross rod 72 positioned in the shell 70, a slot matched with the insert block 73 is formed in the protruding edge wall of the through groove 8, and the exhaust barrel 9 is fixed through a limiting piece 7 by the through groove 8. The confining structure also facilitates unpicking and maintenance.
Preferably, referring to fig. 2, the electrical heating rods 13 arranged at the lower layer of the rack 1 are arranged in an array at the lower side of the transverse mounting frame 101, and include the electrical heating rods arranged on the side walls around the rack 1.
Referring to fig. 6-8, in the air heat pump dryer of the present invention, cabinet plates are disposed around the frame 1 for packaging, and a control circuit is disposed. Including a control box 12. The front side of the rack 1 is provided with an electric cabinet 12 which comprises a first protective door 121 and a second protective door 120, the first protective door 121 is provided with an electric control panel, and one side of the first protective door 121 is provided with a monitoring instrument 122. For the control circuit, as known by the technical personnel in the field, the control circuit is separately arranged, so that the strong current and the weak current are separated, the controller and the control circuit are separated, the operation is convenient, and the installation is more convenient.
Claims (7)
1. The utility model provides an air energy heat pump drying-machine, includes frame (1), frame (1) divides its inner space into a plurality of installation position (2) through horizontal installing frame (101) and vertical installing frame (102), sets up air heat pump set in installation position (2), its characterized in that: the horizontal installation frame (101) and the longitudinal installation frame (102) are arranged in the rack (1) in a drawing mode, a condenser (3) is fixed in the horizontal installation frame (101), an evaporator (4) is fixed in the longitudinal installation frame (102), the rack (1) is divided into an upper layer and a lower layer through the horizontal installation frame (101), an air inlet grille (11) is arranged at the top of the rack, an air heat pump unit is arranged at an upper installation position, an exhaust fan is arranged at a lower layer, and an electric heating rod (13) is arranged at the top of the lower layer;
the lower end of the rack (1) is connected with a base (10), the side edge of the base (10) is I-shaped, the middle part of the base is provided with a lower baffle plate with a through groove (8), an exhaust cylinder (9) is fixed on the lower baffle plate, blades of an exhaust fan are contained in the exhaust cylinder (9), and the exhaust fan is suspended at the lower part of a transverse mounting frame (101);
in the air-source heat pump dryer, two or more mounting positions (2) are arranged, two or more groups are arranged corresponding to the air heat pump units, and the air heat pump units are independently controlled to work through an electric cabinet (12);
in the air energy heat pump dryer, air is admitted by the top air inlet grid (11) of the frame (1), and the air admission includes the air circulation in the drying room, also includes the outside air of top suction drying room, the air heat pump unit includes heat pump compressor, liquid storage pot and drying filter, and heat pump compressor becomes high temperature high-pressure gas to the gas in evaporimeter (4), transmits to condenser (3) in, by condenser (3) downward discharge heat, in the exhaust fan control air current enters into the drying room.
2. The air-energy heat pump dryer of claim 1, wherein: a plurality of limiting pieces (7) are distributed around the upper through groove (8) of the lower baffle plate, and each limiting piece (7) comprises a shell (70) and an insertion block (73) arranged in the shell (70); the lateral wall of inserted block (73) is connected horizontal pole (72), and the part cover that horizontal pole (72) are located shell (70) has spring (74), and the protruding edge wall of logical groove (8) is seted up the slot with inserted block (73) adaptation, and logical groove (8) are through the fixed exhaust section of thick bamboo (9) of locating part (7).
3. The air-energy heat pump dryer of claim 1, wherein: a temperature and humidity detector is arranged on the lower layer of the frame (1) separated by the transverse mounting frame (101).
4. The air-energy heat pump dryer of claim 1, wherein: the front side of the rack (1) is provided with an electric cabinet (12) which comprises a first protective door (121) and a second protective door (120), the first protective door (121) is provided with an electric control panel, and one side of the first protective door (121) is provided with a monitoring instrument (122).
5. The air-energy heat pump dryer of claim 1, wherein: the electric heating rods (13) arranged on the lower layer of the rack (1) are arranged on the lower side of the transverse mounting frame (101) in an array mode and are arranged on the peripheral side wall of the rack (1) in an arrangement mode.
6. The air-energy heat pump dryer of claim 1, wherein: the cabinet plates are arranged around the rack (1), the top of the cabinet plates is provided with an air inlet grille (11), and the bottom of the cabinet plates is provided with air outlet through an air outlet duct (9).
7. The air-energy heat pump dryer of claim 1, wherein: a drain pipe (6) of the evaporator (4) is arranged in the rack (1), the drain pipe (6) is fixed on the rack (1) through a clamping sleeve (5), a protective pad (50) is fixed in the clamping sleeve (5), and two through holes matched with a locking bolt (51) with a nut are formed in the clamping sleeve (5); the clamping sleeve (5) is provided with two through holes matched with the connecting bolts (52), the clamping sleeve (5) is arranged at the top end of the base (10), and the base (10) is provided with two screw holes matched with the connecting bolts (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210532883.5A CN114838580B (en) | 2022-05-14 | 2022-05-14 | Air energy heat pump dryer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210532883.5A CN114838580B (en) | 2022-05-14 | 2022-05-14 | Air energy heat pump dryer |
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| CN114838580A CN114838580A (en) | 2022-08-02 |
| CN114838580B true CN114838580B (en) | 2023-01-17 |
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| CN202210532883.5A Active CN114838580B (en) | 2022-05-14 | 2022-05-14 | Air energy heat pump dryer |
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2022
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