A drying and dehumidifying device of an air source heat pump fruit and vegetable drying machine

Abstract

The present application discloses a drying and dehumidifying device of an air source heat pump fruit and vegetable dryer, which relates to the technical field of drying devices, and comprises an upper cover, a drying box, a base and a controller. A vent and a drying mechanism are arranged in the base, a drying chamber is arranged in the drying box, and an annular ring frame is arranged in the drying chamber. An alarm is fixed to the top edge of the upper cover, and a vertically arranged contact column is fixed to the bottom of the alarm. An alarm contact piece is fixed to the upper end surface of the ring frame at a position corresponding to the bottom end of the contact column, and a contact point is fixedly connected to the alarm contact piece, and the contact point cooperates with the contact column. A plurality of vertically arranged reset springs are evenly distributed at the bottom of the drying chamber, and fixed sheets are coaxially fixed to the upper and lower ends of the plurality of reset springs respectively. The technical effect of being able to remind the user when the fruit and vegetable drying is completed and being able to adjust the degree of fruit and vegetable drying according to needs is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, and in particular to a drying and dehumidifying device of an air source heat pump fruit and vegetable drying machine. Background Art

[0002] Fruit and vegetable drying is a food processing technology that removes moisture from fruits and vegetables to extend their shelf life and reduce their weight and volume. This is essential to prevent mold and rot and to maintain or improve taste, flavor and nutritional value. To achieve this goal, we need to use a fruit and vegetable drying and dehumidification device, which ensures that fruits and vegetables are dried under appropriate temperature and humidity conditions through heating, ventilation and humidity control to obtain high-quality products. This device not only helps to extend the shelf life, facilitate storage and transportation, but also improves nutritional value, taste and flavor, while reducing food waste and reducing the impact on the environment.

[0003] Air source heat pump fruit and vegetable drying machine is a drying equipment that uses air as a heat source and performs efficient energy conversion through fans and heat sources. It absorbs low-temperature air in the environment and raises it to a suitable temperature for drying fruits and vegetables, while reducing energy consumption during the drying process. This equipment is not only energy-saving and environmentally friendly, but also can accurately control the drying temperature and humidity to ensure that fruits and vegetables maintain their nutrients and original color and flavor during the drying process. It is an advanced technology in modern agricultural product processing.

[0004] Existing fruit and vegetable drying and dehumidification devices cannot automatically determine whether the fruits and vegetables are dried. They need to be monitored by humans at all times. In addition, the moisture content of fruits and vegetables is uneven in different parts, and the drying standards of different fruits and vegetables are different, which makes it difficult for the drying and dehumidification devices to accurately measure the actual moisture content of each fruit and vegetable. In addition, although some high-end drying and dehumidification devices are equipped with humidity sensors, these sensors can usually only measure the overall humidity inside the drying and dehumidification devices and cannot make judgments based on the actual conditions of each fruit and vegetable. As a result, most current drying and dehumidification devices cannot achieve automated drying judgments, while increasing labor costs. One person can only operate one dryer at a time, which reduces the production efficiency of the dryer and requires continuous human observation and adjustment to ensure the quality of fruit and vegetable drying. Summary of the invention

[0005] The embodiment of the present application provides a drying and dehumidifying device of an air source heat pump fruit and vegetable dryer, thereby solving the technical problem that the drying and dehumidifying devices in the prior art cannot automatically judge the degree of completion of fruit and vegetable drying, and achieves the technical effect of being able to remind the user when the fruit and vegetable drying is completed and being able to adjust the degree of drying of the fruit and vegetable as needed.

[0006] The embodiment of the present application provides a drying and dehumidifying device of an air source heat pump fruit and vegetable dryer, comprising an upper cover, a drying box, a base and a controller, wherein the base is provided with a vent and a drying mechanism, and the controller is connected to the drying mechanism by signal; a drying chamber is provided inside the drying box, and an annular ring frame is provided inside the drying chamber, and the ring frame and the drying chamber are coaxially slidably matched; the drying box is cylindrical as a whole, the base is fixedly connected to the bottom center of the drying box, the controller is fixed to one side of the drying box, and the upper cover covers the top opening of the drying box; the top edge of the upper cover is fixed An alarm is provided, a vertically arranged contact column is fixed at the bottom of the alarm, and the bottom end of the contact column passes through the bottom of the upper cover; an alarm contact piece is fixed at the upper end surface of the ring frame corresponding to the position of the bottom end of the contact column, and a contact is fixedly connected to the alarm contact piece, and the contact cooperates with the contact column; a plurality of vertically arranged return springs are evenly distributed at the bottom of the drying chamber, and the upper and lower ends of the plurality of return springs are coaxially fixed with fixed sheets, the bottom end of the return spring is detachably fixedly connected to the bottom end surface of the drying chamber through the fixed sheet, and the top end of the return spring is detachably fixedly connected to the lower end surface of the ring frame through the fixed sheet.

[0007] Preferably, a heat pump cavity is provided in the base, the top of the heat pump cavity is connected with the drying cavity, and the drying mechanism is fixed in the heat pump cavity; the drying mechanism comprises a heating plate and a fan; the heating plate is fixed to the bottom center of the heat pump cavity, the fan is fixedly installed above the heating plate, and the output port of the fan is vertically upward toward the placement net; there are multiple vents, and the vents are through grooves for connecting the heat pump cavity with the external space of the base, and the multiple vents are evenly distributed around the heating plate; a limiting column is also fixed to the bottom of the drying cavity, and there are multiple limiting columns, and the multiple limiting columns are evenly distributed on both sides of the reset spring, and the limiting The height of the column is greater than the minimum compression height of the reset spring; a handle is fixed on the side of the upper cover, and an observation groove is provided on the end face of the upper cover, the observation groove is a through groove that penetrates the upper cover, and an observation window is fixedly covered in the observation groove, and the observation window is made of transparent material and is used to observe the drying conditions of the surface of fruits and vegetables; a matching ring is coaxially fixed on the bottom end face of the upper cover, and the overall shape of the matching ring is annular, and the outer diameter of the matching ring matches the inner diameter of the drying chamber; a buckle is fixedly installed on the side wall of the matching ring, and a slot is provided on the side wall of the top opening of the drying box, and the slot matches the buckle for positioning the upper cover.

[0008] Preferably, the fixing plate is a permanent magnet, a positioning groove is provided at the connection between the bottom of the drying box and the fixing plate, a positioning groove is also provided at the connection between the ring frame and the fixing plate, the positioning groove is adapted to the fixing plate, a magnet is fixed inside the positioning groove, so that the fixing plate can be fixed by magnetic attraction of the positioning groove.

[0009] Preferably, the ring frame includes an outer cylinder frame and an inner cylinder frame.

[0010] Preferably, the outer cylinder frame and the inner cylinder frame are coaxially arranged and separated from each other; the outer cylinder frame and the inner cylinder frame are both annular cylinders; and an annular spacing channel is provided between the outer cylinder frame and the inner cylinder frame.

[0011] Preferably, a plurality of sliding cavities are provided inside the outer cylinder frame, and the plurality of sliding cavities are evenly distributed along a circle in the annular direction of the outer cylinder frame, and a sliding magnetic block is slidably connected inside the sliding cavity, and the sliding magnetic block and the sliding cavity are coaxially dynamically sealed; the sliding direction of the sliding magnetic block is colinear with the radial direction of the drying box; a plurality of fixed magnetic blocks are fixedly embedded on the side wall of the drying chamber, and the fixed magnetic blocks are divided into a plurality of columns arranged vertically, and the plurality of columns of fixed magnetic blocks are evenly distributed on the circumference of the inner wall of the drying chamber, and each column is provided with a plurality of fixed magnetic blocks, and the position of each column of fixed magnetic blocks corresponds to the opening position of the sliding cavity one by one; through holes are provided at one end of the sliding cavity close to the drying box and at the other end away from the sliding cavity, so that the two ends of the sliding cavity are respectively connected with the inner ring side and the outer ring side of the outer cylinder frame;

[0012] An annular ring groove is provided on one side of the outer cylinder frame close to the inner cylinder frame, and the cross section of the annular groove is a right triangle with one right-angled side opening toward the inner cylinder frame, and the annular groove includes a supporting inclined surface, which is an annular inclined surface, and the top diameter of the supporting inclined surface is larger than the bottom diameter, and the supporting inclined surface is covered with an annular supporting capsule, and a supporting cavity is formed between the supporting capsule and the supporting inclined surface, and the through hole of the sliding cavity close to the side of the inner cylinder frame is connected to the supporting cavity, so that the sliding cavity and the supporting cavity are connected to each other, and a closed space is formed between the end face of the sliding magnetic block and the supporting capsule;

[0013] A convex ring is fixed on one side of the inner cylinder frame close to the annular groove, and an inclined surface is arranged at the bottom of the convex ring. The convex ring is an annular protrusion coaxial with the inner cylinder frame, and the diameter of the convex ring is larger than the diameter of the inner ring of the outer cylinder frame, and the diameter of the convex ring is smaller than the diameter of the widest part of the annular groove, so that the inner cylinder frame can slide up and down in the outer cylinder frame without completely separating from the outer cylinder frame.

[0014] Preferably, the fixed magnetic block and the sliding magnetic block are both permanent magnets, and the magnetic poles of two adjacent fixed magnetic blocks in the vertical direction facing the sliding magnetic block are opposite, so that when the outer cylinder frame slides in the vertical direction, the sliding magnetic block can slide in opposite directions in turn when passing each fixed magnetic block.

[0015] Preferably, the support cavity is filled with paraffin, which is solid when the air temperature is less than 40 degrees Celsius.

[0016] Preferably, a plurality of spacers are fixedly arranged inside the support cavity, and the spacers are evenly distributed in a circle along the annular direction of the support cavity, and the spacers divide the support cavity into a plurality of independent spaces, and each support cavity corresponds to a sliding cavity, so that the fixed magnetic block at each position can cause a section of the support capsule at the corresponding position to expand and contract.

[0017] Preferably, each section of the support cavity is filled with paraffin wax with different melting points, wherein the melting point difference between adjacent paraffin waxes with different melting points is 3 degrees Celsius to 6 degrees Celsius, and the melting points of the paraffin waxes in adjacent independent spaces increase clockwise.

[0018] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0019] By arranging a reset spring and a ring frame, utilizing the weight change before and after the fruits and vegetables are dried, and replacing reset springs of different specifications, the contacts on the ring frame can activate the alarm under different weight conditions, so that the alarm can timely remind the user according to the drying effect, thereby eliminating the need for the user to observe the internal conditions of the drying chamber all the time, reducing the labor intensity of the user and improving the drying efficiency; by automatically moving the placement net upward, the fruits and vegetables are constantly away from the heating plate, thereby automatically avoiding the risk of burning the fruits and vegetables due to overheating of the heating plate; the technical problem that the drying and dehumidifying device of the prior art cannot automatically judge the degree of completion of the drying of fruits and vegetables is solved, and the technical effect of being able to remind the user when the drying of fruits and vegetables is completed and being able to adjust the degree of drying of fruits and vegetables as needed is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the bottom structure of a base according to Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the bottom structure of the upper cover of the first embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the position of the heating plate inside the drying box according to the first embodiment of the present invention;

[0024] Figure 5 This is a schematic top view of a fan according to Embodiment 1 of the present invention;

[0025] Figure 6 This is a schematic diagram of the position of a fan according to the first embodiment of the present invention;

[0026] Figure 7 It is a top view schematic diagram of the placement net of the first embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the position of the fruit placed on the placement net according to the first embodiment of the present invention;

[0028] Fig. 9 It is a right side cross-sectional structural schematic diagram of the first embodiment of the present invention;

[0029] Fig.10It is a right side cross-sectional structural schematic diagram of the second embodiment of the present invention;

[0030] Fig.11 for Fig.10 A magnified schematic diagram of region A;

[0031] Fig.12 This is a schematic diagram of the expansion state of the support bladder according to the second embodiment of the present invention;

[0032] Fig.13 It is a top view schematic diagram of the relative positions of the fixed magnetic block and the supporting capsule of the second embodiment of the present invention;

[0033] Fig.14 This is a schematic diagram of the sliding cavity and the supporting capsule filled with paraffin in the third embodiment of the present invention;

[0034] Fig.15 This is a schematic diagram of the top view of the internal structure of the support cavity of the fourth embodiment of the present invention;

[0035] Fig.16 It is a schematic top view of a partially deformed state of the support bladder of the fourth embodiment of the present invention;

[0036] Fig.17 This is a schematic diagram of the tilted placement of the net when the support bag is partially deformed according to the fourth embodiment of the present invention.

[0037] In the figure:

[0038] Base 100; vent 110; heat pump cavity 120; heating plate 130; fan 140; drying box 200; drying cavity 210; return spring 220; fixing plate 221; limiting column 230; slot 240; fixing magnet 250; upper cover 300; handle 310; observation window 320; matching ring 330; buckle 340; controller 400; screen 410; switch 420; alarm 500; contact column 510; ring frame 600; placement net 610; alarm contact piece 620; contact point 621; outer cylinder frame 630; sliding cavity 631; ring groove 632; supporting inclined surface 633; ​​sliding magnet 634; inner cylinder frame 640; convex ring 641; spacing channel 650; supporting capsule 660; supporting cavity 661; spacing plate 662. DETAILED DESCRIPTION

[0039] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0040] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0042] Embodiment 1: Figures 1 to 9 As shown, the present application is a drying and dehumidifying device of an air source heat pump fruit and vegetable dryer, comprising an upper cover 300, a drying box 200, a base 100 and a controller 400, wherein the base 100 is provided with a vent 110 and a drying mechanism, and the controller 400 is connected to the drying mechanism signal for controlling the drying time and the drying temperature; a drying chamber 210 is provided inside the drying box 200, and an annular ring frame 600 is provided inside the drying chamber 210, and the ring frame 600 is coaxially slidably matched with the drying chamber 210; the drying box 200 is cylindrical as a whole, the base 100 is fixedly connected to the bottom center of the drying box 200, and the controller 400 is fixed to the drying chamber 210. On one side of the drying box 200, the upper cover 300 covers the top opening of the drying box 200; an alarm 500 is fixed to the top edge of the upper cover 300, and a vertically arranged contact post 510 is fixed to the bottom of the alarm 500, and the bottom end of the contact post 510 passes through the bottom of the upper cover 300; an alarm contact piece 620 is fixed to the upper end surface of the ring frame 600 corresponding to the bottom end position of the contact post 510, and a contact point 621 is fixedly connected to the alarm contact piece 620, and the contact point 621 cooperates with the contact post 510; when the contact point 621 contacts the contact post 510, the alarm 500 is activated, and the alarm 500 emits a prompt sound to the outside world, thereby reminding the staff that the drying is completed. A plurality of vertically arranged return springs 220 are evenly distributed at the bottom of the drying chamber 210, and a fixing plate 221 is coaxially fixed at the upper and lower ends of the plurality of return springs 220, and the bottom end of the return spring 220 is detachably fixedly connected to the bottom end surface of the drying chamber 210 via the fixing plate 221, and the top end of the return spring 220 is detachably fixedly connected to the lower end surface of the ring frame 600 via the fixing plate 221.

[0043] When it is necessary to dry fruits and vegetables, the user selects a suitable return spring 220 according to different weight requirements and installs it between the bottom of the drying chamber 210 and the lower end surface of the rack 600, and then places the fruits on the placement net 610 and closes the upper cover 300. Since the fruits have more moisture inside and the overall weight is larger at this time, the gravity of the fruits drives the rack 600 to press down the return spring 220. After the return spring 220 is compressed, the rack 600 slides downward so that the contact 621 is away from the contact column 510. When drying is in progress, the moisture of the fruits and vegetables continues to decrease, and the weight of the fruits and vegetables is reduced. The return spring 220 continuously bounces upward, so that the contact 621 slides upward with the rack 600. When the contact 621 contacts the contact column 510, the alarm 500 is triggered to remind the user that the drying is completed.

[0044] A heat pump chamber 120 is opened in the base 100, and the top of the heat pump chamber 120 is connected to the drying chamber 210, and the drying mechanism is fixed in the heat pump chamber 120; the drying mechanism includes a heating plate 130 and a fan 140; the heating plate 130 is fixed at the bottom center of the heat pump chamber 120, and the fan 140 is fixedly installed above the heating plate 130, and the output port of the fan 140 is vertically upward toward the placement net 610.

[0045] There are a plurality of vents 110 , which are through slots for connecting the heat pump cavity 120 with the external space of the base 100 . The plurality of vents 110 are evenly distributed around the heating plate 130 .

[0046] A limiting column 230 is also fixed to the bottom of the drying chamber 210 . There are multiple limiting columns 230 , which are evenly distributed on both sides of the reset spring 220 . The height of the limiting column 230 is greater than the minimum compression height of the reset spring 220 .

[0047] Preferably, the fixing plate 221 is a permanent magnet, a positioning groove is provided at the connection between the bottom of the drying box 200 and the fixing plate 221, a positioning groove is also provided at the connection between the ring frame 600 and the fixing plate 221, the positioning groove is adapted to the fixing plate 221, a magnet is fixed inside the positioning groove, so that the fixing plate 221 can be fixed by the magnetic attraction of the positioning groove, and the user can install reset springs 220 of different specifications; thereby, the mutual contact speed between the contact point 621 and the contact column 510 can be set under different drying degrees of fruits and vegetables.

[0048] The controller 400 includes a screen 410, a switch 420, a control button and a control chip. The user can start or turn off the controller 400 through the switch 420. The control button, screen 410, switch 420 and drying mechanism are all connected to the control chip signal. The control button is used to input drying parameters to the control chip, thereby adjusting the speed of the fan 140 and the heating temperature of the heating plate 130.

[0049] A handle 310 is fixed to the side of the upper cover 300, and an observation groove is provided on the end surface of the upper cover 300. The observation groove is a through groove that penetrates the upper cover 300, and an observation window 320 is fixedly covered in the observation groove. The observation window 320 is made of a transparent material, preferably glass, and is used to observe the drying conditions of the surface of fruits and vegetables; a matching ring 330 is coaxially fixed to the bottom end surface of the upper cover 300, and the overall shape of the matching ring 330 is annular, and the outer diameter of the matching ring 330 matches the inner diameter of the drying chamber 210; a buckle 340 is fixedly installed on the side wall of the matching ring 330, and a slot 240 is provided on the side wall of the drying box 200 at the top opening, and the slot 240 cooperates with the buckle 340 to position the upper cover 300.

[0050] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0051] In this embodiment, by setting a reset spring 220 and a ring frame 600, the weight change of fruits and vegetables before and after drying is utilized, and by replacing reset springs 220 of different specifications, the contact 621 on the ring frame 600 activates the alarm 500 under different weight conditions, so that the alarm 500 can timely remind the user according to the drying effect, thereby eliminating the need for the user to observe the internal situation of the drying chamber 210 all the time, reducing the labor intensity of the user and improving the drying efficiency; by automatically moving the placement net 610 upward, the fruits and vegetables are constantly moved away from the heating plate 130, thereby automatically avoiding the risk of burning the fruits and vegetables due to overheating of the heating plate 130; the technical problem that the drying and dehumidifying device of the prior art cannot automatically judge the degree of completion of fruit and vegetable drying is solved, and the technical effect of reminding the user when the fruit and vegetable drying is completed and adjusting the degree of drying of the fruit and vegetable according to needs is achieved.

[0052] Embodiment 2: Considering that in the process of fruits and vegetables in the above-mentioned embodiment 1 being dried on the placement net 610, since the relative position of the fruits and vegetables and the placement net 610 remains unchanged, the fruits and vegetables may be heated unevenly, and secondly, they may stick to the placement net 610 due to the increase in temperature, causing damage to the fruits and vegetables. The existing drying machine directly turns the fruits and vegetables through a lever, but the turning amplitude does not change, and can only be maintained at a higher turning force to ensure that the fruits and vegetables can be turned even when the moisture content is large. However, in the process of turning the fruits and vegetables, when the moisture content of the fruits and vegetables is large, it is not necessary to turn the fruits and vegetables greatly. If the fruits and vegetables are turned directly by the lever, it is easy to cause a large friction between the fruits and vegetables and the placement net 610, causing damage to the fruits and vegetables, and the timing of turning is also difficult to grasp. The fruits and vegetables do not need to be turned all the time during the drying process. It is only necessary to properly adjust the position of the fruits and vegetables when the moisture content of the fruits and vegetables decreases to avoid adhesion of the fruits and vegetables. Therefore, the device needs to be improved, such as Figures 10 to 13 As shown, the specific structure is as follows:

[0053] The ring frame 600 includes an outer cylinder frame 630 and an inner cylinder frame 640; the outer cylinder frame 630 and the inner cylinder frame 640 are coaxially arranged and separated from each other; the outer cylinder frame 630 and the inner cylinder frame 640 are both annular cylinders; an annular spacing channel 650 is provided between the outer cylinder frame 630 and the inner cylinder frame 640.

[0054] A plurality of sliding cavities 631 are provided inside the outer cylinder frame 630, and the plurality of sliding cavities 631 are evenly distributed in a circle along the annular direction of the outer cylinder frame 630. A sliding magnetic block 634 is slidably connected inside the sliding cavity 631, and the sliding magnetic block 634 is coaxially dynamically sealed with the sliding cavity 631; the sliding direction of the sliding magnetic block 634 is colinear with the radial direction of the drying box 200.

[0055] A plurality of fixed magnetic blocks 250 are fixedly embedded on the side wall of the drying chamber 210. The fixed magnetic blocks 250 are divided into a plurality of vertically arranged columns. The plurality of columns of fixed magnetic blocks 250 are evenly distributed on the circumference of the inner wall of the drying chamber 210. Each column is provided with a plurality of fixed magnetic blocks 250. The positions of the fixed magnetic blocks 250 in each column correspond one-to-one to the opening positions of the sliding chamber 631.

[0056] like Fig.11 The sliding cavity 631 has through holes at one end close to the drying box 200 and at one end away from the sliding cavity 631, so that the two ends of the sliding cavity 631 are respectively connected with the inner ring side and the outer ring side of the outer cylinder frame 630;

[0057] An annular ring groove 632 is provided on one side of the outer cylinder frame 630 close to the inner cylinder frame 640. The cross section of the annular groove 632 is a right triangle with one right-angled side opening toward the inner cylinder frame 640. The annular groove 632 includes a supporting slope 633. The supporting slope 633 is an annular slope. The top diameter of the supporting slope 633 is larger than the bottom diameter. The supporting slope 633 is covered with an annular supporting capsule 660. A supporting cavity 661 is formed between the supporting capsule 660 and the supporting slope 633. The through hole of the sliding cavity 631 close to the side of the inner cylinder frame 640 is connected to the supporting cavity 661, so that the sliding cavity 631 and the supporting cavity 661 are connected to each other, and a closed space is formed between the end face of the sliding magnetic block 634 and the supporting capsule 660.

[0058] A convex ring 641 is fixed to one side of the inner cylinder frame 640 close to the annular groove 632, and an inclined surface is provided at the bottom of the convex ring 641. The convex ring 641 is an annular protrusion coaxial with the inner cylinder frame 640. The diameter of the convex ring 641 is larger than the inner ring diameter of the outer cylinder frame 630, and the diameter of the convex ring 641 is smaller than the diameter of the widest part of the annular groove 632, so that the inner cylinder frame 640 can slide up and down in the outer cylinder frame 630 without completely separating from the outer cylinder frame 630.

[0059] The fixed magnet 250 and the sliding magnet 634 are both permanent magnets. Between two adjacent fixed magnets 250 in the vertical direction, the magnetic poles facing the sliding magnet 634 are opposite, so that when the outer cylinder frame 630 slides in the vertical direction, the sliding magnet 634 can slide in the opposite direction in turn when passing each fixed magnet 250; therefore, as the moisture content of fruits and vegetables changes, the expansion and contraction of the support capsule 660 is controlled at intervals by the sliding magnet 634, and the position of the convex ring 641 is changed during the expansion and contraction of the support capsule 660, so that the inner cylinder frame 640 drives the placement net 610 to move, and the placement net 610 drives the fruits and vegetables to adjust their positions as the drying degree changes, and at the same time will not affect the telescopic movement of the return spring 220 at the bottom of the outer cylinder frame 630.

[0060] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0061] In this embodiment, by setting the cooperation between the support capsule 660 and the fixed magnetic block 250, when the weight of the fruit and vegetable is lighter, the expansion and contraction speed of the support capsule 660 is faster, and when the weight of the fruit and vegetable is heavier, the buffering effect of the support capsule 660 on the fruit and vegetable is stronger, thereby avoiding the possibility of easy damage to the heavy-weight fruit and vegetable. Therefore, the adjustment force of the placement net 610 on the fruit and vegetable will also change in a step-by-step manner with the drying degree of the fruit and vegetable. At the same time, the weight reduction of the fruit and vegetable during the drying process can be used to automatically increase the adjustment force on the position of the fruit and vegetable, and the adjustment time interval is determined by the weight of the fruit and vegetable. When the weight of the fruit and vegetable is reduced, the ring frame 60 0 slides upward and slides to the height position of the corresponding fixed magnetic block 250 at the same time, the position of the fruits and vegetables is adjusted once, thereby reducing the risk of damage caused by over-frequent turning of the fruits and vegetables, and also controlling the position of the fruits and vegetables to be adjusted at the best time when drying; secondly, since a spacing channel 650 is provided between the outer cylinder frame 630 and the inner cylinder frame 640, the position of the fruits and vegetables can be slightly shaken with the hot air blown out by the fan 140 by utilizing the activity space of the spacing channel 650 and the elasticity of the support capsule 660, so that the same part of the bottom of the fruits and vegetables will not be continuously compressed, thereby improving the anti-adhesion effect.

[0062] Embodiment 3: Considering that in the above embodiment 2, after the user places the fruits and vegetables on the placement net 610, the fruits and vegetables press down to make the outer cylinder frame 630 slide downward continuously, and the support capsule 660 will also continuously shrink and expand to move back and forth, which may cause the position of the placed fruits and vegetables to become disordered. Therefore, it is necessary to improve the device, such as Fig.14 As shown, the specific structure is as follows:

[0063] The support cavity 661 is filled with paraffin, which is solid when the air temperature is less than 40 degrees Celsius.

[0064] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0065] In this embodiment, paraffin is arranged. When the paraffin reaches the melting point and melts into liquid, the support capsule 660 can expand or contract, thereby avoiding the possibility that the support capsule 660 changes the placement position of fruits and vegetables when the drying mechanism is not started; the fruits and vegetables are stationary when the ring frame 600 moves downward, and the placement net 610 can start to move when the temperature rises and the moisture of the fruits and vegetables decreases, thereby ensuring the stability of the device operation and improving the convenience of use. At the same time, no additional power is required, saving energy; therefore, this embodiment solves the technical problem in the above-mentioned second embodiment that the support capsule 660 may disturb the position of fruits and vegetables when the user places fruits and vegetables on the placement net 610, and achieves the technical effect that the support capsule 660 can remain stationary when the ring frame 600 moves downward.

[0066] Embodiment 4: Considering that in the above embodiment, when the supporting capsule 660 as a whole shrinks or expands, the placing net 610 as a whole moves in the vertical direction, the fruits and vegetables with a smaller contact area with the placing net 610 are more easily adjusted, while the position of the fruits and vegetables with a larger contact area is difficult to change, so it is necessary to improve the device, such as Figures 15 to 17 As shown, the specific structure is as follows:

[0067] A plurality of spacers 662 are fixedly arranged inside the support cavity 661. The spacers 662 are evenly distributed along the annular direction of the support cavity 661. The spacers 662 divide the support cavity 661 into a plurality of independent spaces. Each support cavity 661 corresponds to a sliding cavity 631. Thus, the fixed magnetic block 250 at each position can make a section of the support capsule 660 at the corresponding position expand and contract (such as Fig.16 The middle arrow indicates the expansion and contraction direction of one section of the support capsule 660); each section of the support cavity 661 is filled with paraffin wax with different melting points, wherein the melting point difference between adjacent paraffin waxes with different melting points is 3 degrees Celsius to 6 degrees Celsius, and the melting points of the paraffin waxes in adjacent independent spaces increase in a clockwise direction.

[0068] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0069] In this embodiment, the support cavity 661 is divided into multiple parts by setting a spacer 662, and paraffin wax with different melting points is filled in the multiple support cavities 661. The support capsule 660 pushes the inner cylinder frame 640 from different angles each time by utilizing the sequential melting of the paraffin wax, thereby reducing the shrinkage and expansion frequency of the support capsule 660 while ensuring that the turning frequency of fruits and vegetables does not change, thereby improving the use effect of the support capsule 660; utilizing the expansion and contraction of the support capsule 660 at different angles, the placement net 610 is tilted and the tilting direction is changed sequentially, thereby achieving a better turning effect without damaging the fruits and vegetables; since most fruits and vegetables are irregular in shape, while ensuring that the position of the fruits and vegetables is changed, the fruits and vegetables can be turned over at multiple angles in turn, thereby avoiding repeated turning back and forth between only two angles, thereby achieving a better drying effect without damaging the fruits and vegetables and without the need to provide additional power.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drying and dehumidifying device of an air source heat pump fruit and vegetable drying machine, comprising an upper cover (300), a drying box (200), a base (100) and a controller (400), characterized in that: The base (100) is provided with a vent (110) and a drying mechanism, and the controller (400) is connected to the drying mechanism by signal. The drying box (200) is provided with a drying chamber (210), and the drying chamber (210) is provided with an annular ring frame (600), and the ring frame (600) and the drying chamber (210) are coaxially slidably matched. The drying box (200) is cylindrical in shape as a whole, the base (100) is fixedly connected to the bottom center of the drying box (200), the controller (400) is fixed to one side of the drying box (200), and the upper cover (300) covers the top opening of the drying box (200); an alarm (500) is fixed to the top edge of the upper cover (300), and a vertically arranged contact post (500) is fixed to the bottom of the alarm (500). 10), the bottom end of the contact column (510) penetrates to the bottom of the upper cover (300); an alarm contact piece (620) is fixed on the upper end surface of the ring frame (600) at a position corresponding to the bottom end of the contact column (510), and a contact point (621) is fixedly connected to the alarm contact piece (620), and the contact point (621) cooperates with the contact column (510); a plurality of vertically arranged return springs (220) are evenly distributed on the bottom of the drying chamber (210), and the upper and lower ends of the plurality of return springs (220) are coaxially fixed with fixed sheets (221), and the bottom end of the return spring (220) is detachably fixedly connected to the bottom end surface of the drying chamber (210) through the fixed sheet (221), and the top end of the return spring (220) is detachably fixedly connected to the lower end surface of the ring frame (600) through the fixed sheet (221).

2. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 1 is characterized in that: A heat pump chamber (120) is provided in the base (100); the top of the heat pump chamber (120) is communicated with the drying chamber (210); the drying mechanism is fixed in the heat pump chamber (120); the drying mechanism comprises a heating plate (130) and a fan (140); the heating plate (130) is fixed at the bottom center of the heat pump chamber (120); the fan (140) is fixedly installed above the heating plate (130); the output port of the fan (140) is The drying chamber (210) is provided with a plurality of vents (110), each of which is a through slot for connecting the heat pump chamber (120) with the external space of the base (100), and the plurality of vents (110) are evenly distributed around the heating plate (130); a limiting column (230) is also fixed to the bottom of the drying chamber (210), and the limiting column (230) is provided with a plurality of limiting columns (230), and the plurality of limiting columns (230) are evenly distributed on the reset spring (220). ) on both sides, the height of the limit column (230) is greater than the minimum compression height of the return spring (220); a handle (310) is fixed on the side of the upper cover (300), and an observation groove is provided on the end surface of the upper cover (300), the observation groove is a through groove that penetrates the upper cover (300), and an observation window (320) is fixedly covered in the observation groove, and the observation window (320) is made of a transparent material and is used to observe the drying conditions of the fruit and vegetable surface; a matching ring (330) is coaxially fixed on the bottom end surface of the upper cover (300), the matching ring (330) is annular as a whole, and the outer diameter of the matching ring (330) matches the inner diameter of the drying chamber (210); a buckle (340) is fixedly installed on the side wall of the matching ring (330), and a buckle groove (240) is provided on the side wall of the top opening of the drying box (200), and the buckle groove (240) matches the buckle (340) to position the upper cover (300).

3. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 1, characterized in that: The fixing plate (221) is a permanent magnet. A positioning groove is provided at the connection between the bottom of the drying box (200) and the fixing plate (221). A positioning groove is also provided at the connection between the ring frame (600) and the fixing plate (221). The positioning groove is adapted to the fixing plate (221). A magnet is fixed inside the positioning groove so that the fixing plate (221) can be fixed by magnetic attraction of the positioning groove.

4. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 2, characterized in that: The coil frame (600) comprises an outer cylinder frame (630) and an inner cylinder frame (640).

5. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 4, characterized in that: The outer cylinder frame (630) and the inner cylinder frame (640) are coaxially arranged and separated from each other; the outer cylinder frame (630) and the inner cylinder frame (640) are both annular cylinders; and an annular spacing channel (650) is provided between the outer cylinder frame (630) and the inner cylinder frame (640).

6. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 5, characterized in that: A plurality of sliding cavities (631) are provided inside the outer cylinder frame (630), and the plurality of sliding cavities (631) are evenly distributed in a circle along the annular direction of the outer cylinder frame (630). A sliding magnetic block (634) is slidably connected inside the sliding cavity (631), and the sliding magnetic block (634) and the sliding cavity (631) are coaxially dynamically sealed. The sliding direction of the sliding magnetic block (634) is colinear with the radial direction of the drying box (200). A plurality of fixed magnetic blocks (250) are fixedly embedded on the side wall of the drying cavity (210), and the fixed magnetic blocks (250) are The blocks (250) are divided into a plurality of vertically arranged columns, and the plurality of columns of fixed magnetic blocks (250) are evenly distributed on the circumference of the inner wall of the drying chamber (210), and each column is provided with a plurality of fixed magnetic blocks (250), and the position of each column of fixed magnetic blocks (250) corresponds to the opening position of the sliding chamber (631) one by one; the sliding chamber (631) is provided with through holes at one end close to the drying box (200) and at one end away from the sliding chamber (631), so that the two ends of the sliding chamber (631) are respectively connected with the inner ring side and the outer ring side of the outer cylinder frame (630); An annular groove (632) is provided on one side of the outer cylinder frame (630) close to the inner cylinder frame (640); the cross section of the annular groove (632) is a right triangle with one right-angled side opening toward the inner cylinder frame (640); the annular groove (632) comprises a supporting inclined surface (633); the supporting inclined surface (633) is an annular inclined surface; the top diameter of the supporting inclined surface (633) is larger than the bottom diameter; the supporting inclined surface (633) is covered with an annular supporting capsule (660); a supporting cavity (661) is formed between the supporting capsule (660) and the supporting inclined surface (633); a through hole on the side of the sliding cavity (631) close to the inner cylinder frame (640) is connected to the supporting cavity (661), so that the sliding cavity (631) and the supporting cavity (661) are connected to each other, and a closed space is formed between the end surface of the sliding magnetic block (634) and the supporting capsule (660); A convex ring (641) is fixed to one side of the inner cylinder frame (640) close to the annular groove (632); an inclined surface is provided at the bottom of the convex ring (641); the convex ring (641) is an annular protrusion coaxial with the inner cylinder frame (640); the diameter of the convex ring (641) is larger than the diameter of the inner ring of the outer cylinder frame (630); and the diameter of the convex ring (641) is smaller than the diameter of the widest part of the annular groove (632), so that the inner cylinder frame (640) can slide up and down in the outer cylinder frame (630) without completely separating from the outer cylinder frame (630).

7. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 6, characterized in that: The fixed magnetic block (250) and the sliding magnetic block (634) are both permanent magnets. Between two adjacent fixed magnetic blocks (250) in the vertical direction, the magnetic poles facing the sliding magnetic block (634) are opposite, so that when the outer cylinder frame (630) slides in the vertical direction, the sliding magnetic block (634) can slide in opposite directions in turn when passing each fixed magnetic block (250).

8. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 7, characterized in that: The support cavity (661) is filled with paraffin wax, which is solid when the air temperature is less than 40 degrees Celsius.

9. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 8, characterized in that: A plurality of spacers (662) are fixedly arranged inside the support cavity (661), and the spacers (662) are evenly distributed in a circle along the annular direction of the support cavity (661). The spacers (662) divide the support cavity (661) into a plurality of independent spaces, and each section of the support cavity (661) corresponds to a sliding cavity (631), so that the fixed magnetic block (250) at each position can cause a section of the support capsule (660) at the corresponding position to perform expansion and contraction movements.

10. The drying and dehumidifying device of the air source heat pump fruit and vegetable drying machine according to claim 9, characterized in that: Each section of the support cavity (661) is filled with paraffin wax with different melting points, wherein the difference in melting points between adjacent paraffin waxes with different melting points is 3 degrees Celsius to 6 degrees Celsius, and the melting points of the paraffin waxes in adjacent independent spaces increase in a clockwise direction.

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