Heat pump type nut drying device

Abstract

The heat pump type nut drying device comprises a heat preservation chamber, a heat pump unit and a supporting grating, the interior of the heat preservation chamber is divided into a drying bin, an air return bin and an air inlet bin through partition plates, one side of the air inlet bin communicates with an air outlet of the heat pump unit, the other side of the air inlet bin communicates with the lower portion of the drying bin, and the upper portion of the drying bin communicates with one side of the air return bin; the other side of the air return bin communicates with an air inlet of the heat pump unit. Limiting blocks are arranged on the lower portion of the drying bin, the supporting grating is installed on the lower portion of the drying bin through the limiting blocks, the supporting grating comprises a frame, guide rods and supporting rods, and the multiple guide rods are welded to the frame in parallel. According to the device, the guide rods are arranged on the supporting grating, round macadamia nuts can smoothly roll between the guide rods and can be smoothly discharged out of the drying bin, the heat pump unit is used as a heat source, energy consumption of the device is reduced, dust in return air is reduced by arranging the dust removal cloth bag, and normal work of a condenser in the heat pump unit is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of macadamia nut processing, and particularly to a heat pump type nut drying device. Background Art

[0002] Macadamia nuts, also known as Hawaiian nuts, are a type of nut that has gradually become popular in recent years. Their fruits are approximately round. During processing, they need to be dried to reduce their moisture content and extend the storage time of the nuts. For example, a Chinese patent with the application number 202122120359.0 discloses a gravity flow structure of a nut dryer, which includes a drying box body and a traction mechanism. One side of the drying box body is provided with a feed inlet. A box door is detachably arranged on the drying box body, and the box door is used to close the feed inlet. A perforated plate is arranged inside the drying box body. One end of the perforated plate is hinged at the bottom of the feed inlet, and the other end of the perforated plate is a free end. The traction mechanism is arranged on the top of the drying box body, and the traction mechanism is connected to the free end of the perforated plate. The traction mechanism is used to drive the perforated plate to rotate upward along the hinge point with the drying box body. When discharging, the dried macadamia nuts automatically slide out of the drying box body through the inclined perforated plate. The holes on the perforated plate are mainly used for the passage of hot air. However, the round macadamia nuts can get stuck in the perforated plate, affecting the passage of hot air, and the stuck macadamia nuts are prone to blocking the rolling of other macadamia nuts, affecting the discharging speed. Secondly, this device is heated by a burner. Macadamia nuts need to be continuously heated at about 80°C for 3 to 5 days, and the energy consumption of the burner is relatively high. Therefore, a heat pump type nut drying device is provided, which uses a grille to support the macadamia nuts so that they can roll smoothly, uses a heat pump as the heat source, and is equipped with an internal fan to reduce the energy consumption during drying and reduce the production cost of enterprises. Summary of the Utility Model

[0003] In order to solve the above problems, this application proposes a heat pump type nut drying device, which uses a grille to support the macadamia nuts so that they can roll smoothly, uses a heat pump as the heat source, and is equipped with an internal fan to reduce the energy consumption during drying and reduce the production cost of enterprises.

[0004] This application is achieved through the following technical solutions:

[0005] This application provides a heat pump type nut drying device, including: a heat preservation chamber, a heat pump unit, and a support grid. The heat preservation chamber is divided into a drying chamber, a return air chamber, and an air inlet chamber by a partition. One side of the air inlet chamber is communicated with the air outlet of the heat pump unit, the other side of the air inlet chamber is communicated with the lower part of the drying chamber, the upper part of the drying chamber is communicated with one side of the return air chamber, and the other side of the return air chamber is communicated with the air inlet of the heat pump unit; a limiting block is arranged at the lower part of the drying chamber, and the support grid is installed at the lower part of the drying chamber through the limiting block. The support grid includes a frame, guide rods, and support rods. A plurality of the guide rods are welded to the frame in parallel, and the guide rods are connected to each other by the support rods. The support rods are located below the guide rods and both ends of the support rods are connected to the frame.

[0006] Further, the support grid is inclined and installed in the drying chamber, the guide rods have an angle of 10° to 20° with the horizontal plane, and a discharge port is arranged at the lower end position of the drying chamber where the support grid is located.

[0007] Further, the upper ends of the guide rods are flush with the end face of the frame, and a concave part is arranged at the lower part of the frame. The bottom surface of the concave part is 5 mm to 10 mm lower than the upper ends of the guide rods. The support rods are perpendicular to the guide rods, and a gap of 5 mm to 12 mm is left between the guide rods.

[0008] Further, it further includes a plurality of horizontal air ducts. The horizontal air ducts are horizontally installed in the drying chamber. After one ends of the horizontal air ducts are connected in parallel, they are communicated with the return air chamber through a fan.

[0009] Further, a one-way valve is arranged between the air inlet chamber and the drying chamber.

[0010] Further, a dust removal cloth bag is arranged between the drying chamber and the return air chamber.

[0011] Further, inclined triangular blocks are arranged on both sides of the lower end of the support grid.

[0012] Further, a plurality of vibrating rods are installed in the drying chamber.

[0013] The beneficial effects of this application: By arranging guide rods on the support grid, the round macadamia nuts can roll smoothly between the guide rods, so that they can be discharged from the drying chamber smoothly. Moreover, a heat pump unit is used as the heat source to reduce the energy consumption of the equipment, and by arranging a dust removal cloth bag, the dust in the return air is reduced to ensure the normal operation of the condenser in the heat pump unit. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is a structural schematic diagram of the upper part of the support grid of the present utility model;

[0016] Figure 3 This is a schematic structural diagram of the lower part of the support grille of the present utility model;

[0017] In the figure: 1 - insulation chamber, 2 - heat pump unit, 3 - support grille, 4 - drying bin, 5 - return air bin, 6 - air inlet bin, 7 - limit block, 8 - frame, 9 - guide rod, 10 - support rod, 11 - horizontal air duct, 12 - fan, 13 - one-way valve, 14 - dust removal cloth bag, 15 - inclined triangular block, 16 - vibrating rod. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Among them, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0020] In addition, the descriptions involving "first", "second", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0021] Such as Figures 1 to 3As shown in the figure, an embodiment of the present utility model provides a heat pump type nut drying device, including: a heat preservation chamber 1, a heat pump unit 2, and a support grille 3. The heat preservation chamber 1 is divided into a drying chamber 4, a return air chamber 5, and an air inlet chamber 6 by a partition. One side of the air inlet chamber 6 is communicated with the air outlet of the heat pump unit 2, the other side of the air inlet chamber 6 is communicated with the lower part of the drying chamber 4, the upper part of the drying chamber 4 is communicated with one side of the return air chamber 5, and the other side of the return air chamber 5 is communicated with the air inlet of the heat pump unit 2; a limiting block 7 is provided at the lower part of the drying chamber 4, and the support grille 3 is installed at the lower part of the drying chamber 4 through the limiting block 7. The support grille 3 includes a frame 8, guide rods 9, and support rods 10. Multiple guide rods 9 are welded in parallel on the frame 8, and the guide rods 9 are connected to each other by the support rods 10. The support rods 10 are located below the guide rods 9 and both ends of the support rods 10 are connected to the frame 8.

[0022] Macadamia nuts are fed into the drying chamber 4 through a feed pipe. After loading is completed, the heat pump unit 2 and the fan 12 are started. The heat pump unit 2 uses a commercially available heat pump unit. After absorbing heat through the evaporator, it releases heat in the condenser, thereby heating the air, and sending the hot air into the air inlet chamber 6 through the fan, and sending the hot air into the lower part of the drying chamber 4 through the air inlet chamber 6. Under the action of air pressure, the air flow flows towards the low-pressure area in the upper part of the drying chamber 4, thereby heating the macadamia nuts in the drying chamber 4. After the temperature of the macadamia nuts rises, the water evaporation speed accelerates, so as to achieve the purpose of drying. The hot air enters the return air chamber 5 after passing through the dust removal cloth bag 14. Part of the air flow returns to the heat pump unit 2, and the other part of the air flow flows into the drying chamber 4 through the fan 12. The existing heat pump unit 2 has an internal and external circulation switching function. In the initial stage of drying, there is more moisture in the macadamia nuts. At this time, the external circulation is adopted, and the wet heat after drying can be discharged and fresh air can be inhaled, heated and sent into the drying chamber 4, so as to quickly reduce the moisture content of the nuts in the drying chamber 4. In the middle and late stages of drying, at this time, the moisture content of the macadamia nuts is already relatively low. At this time, the heat pump unit 2 switches to the internal circulation mode, and continuously heats the drying chamber 4 through the heat pump unit 2 to ensure that the drying chamber 4 is within the process temperature range, and the humidity is monitored in real time. When the humidity is relatively high, it is switched back to the external circulation to reduce the air humidity. The existing heat preservation chamber 1 is usually provided with a relatively thick heat preservation layer on the outside. Even when the heating power of the heat pump unit 2 is reduced to the lowest, the heat generated is still higher than the heat lost. At this time, the heat pump unit 2 can be turned off, and only the fan 12 is turned on. The hot air in the drying chamber 4 is circulated through the fan 12. Only when the humidity or temperature is close to the set value, the heat pump unit 2 is started, so as to reduce the energy consumption of the entire drying device. Guide rods 9 are provided on the upper part of the support grille 3. When discharging materials after drying, the round macadamia nuts can roll between the 9, ensuring smooth discharging. At the same time, the hot air can flow upward through the gaps between the guide rods 9, ensuring the smooth flow of the air flow.

[0023] In a specific embodiment, the support grille 3 is inclined and installed in the drying bin 4. The guide rod 9 forms an angle of 10° to 20° with the horizontal plane. And a discharge port is provided at the lower end position of the drying bin 4 on the support grille 3. A baffle is provided on the discharge port. When discharging, the baffle is removed, and the macadamia nuts can be discharged from the drying bin 4 under the action of gravity.

[0024] In a specific embodiment, the upper end of the guide rod 9 is flush with the end face of the frame 8. And a concave portion is provided at the lower part of the frame 8. The bottom surface of the concave portion 8 is 5 mm to 10 mm lower than the upper end of the guide rod 9. The support rod 10 is perpendicular to the guide rod 9. A gap of 5 mm to 12 mm is left between the guide rods 9. So that when discharging, the macadamia nuts can roll smoothly on the guide rod 9. And after rolling from the guide rod 9 to the concave portion, they are discharged from the discharge port.

[0025] In a preferred embodiment, it further includes multiple horizontal air ducts 11. The horizontal air ducts 11 are horizontally installed in the drying bin 4. After one ends of the horizontal air ducts 11 are connected in parallel, they are communicated with the return air bin 5 through a blower 12. Since a relatively thick thermal insulation layer is usually provided outside the existing insulation chamber 1. Even if the heating power of the heat pump unit 2 is reduced to the lowest, when the heat generated by it is still higher than the lost heat. That is, in the middle and late stages of drying, the heat pump unit 2 cannot be turned on in real time. At this time, the heat pump unit 2 can be turned off, and only the blower 12 is turned on. Through the blower 12, the hot air in the drying bin 4 is circulated. Only when the humidity or temperature is close to the set value, the heat pump unit 2 is started. Thus, the energy consumption of the entire drying device is reduced. The horizontal air ducts 11 can ensure the temperature difference between the upper and lower parts inside the drying bin 4 and make the moisture evenly distributed up and down.

[0026] Specifically, a one-way valve 13 is provided between the air inlet bin 6 and the drying bin 4. When only the blower 12 is started, it can prevent the hot air from flowing back to the return air bin 5 or the heat pump unit 2. Thus, controlling the orderly flow of the air current.

[0027] Preferably, a dust removal cloth bag 14 is provided between the drying bin 4 and the return air bin 5. The macadamia nuts carry a lot of dust, which is collected through the dust removal cloth bag 14. Reducing the adhesion speed of the dust on the fan blades of the blower and the condenser pipes. And extending the maintenance time of the equipment.

[0028] Preferably, inclined triangular blocks 15 are provided on both sides of the lower end of the support grille 3. When discharging, the inclined triangular blocks 15 guide the macadamia nuts rolling down along the frame 8 onto the guide rod 9. So as to facilitate the complete discharge of the macadamia nuts.

[0029] In a specific embodiment, multiple vibrating rods 16 are installed in the drying bin 4. During drying, the nuts inside the drying bin 4 can be vibrated regularly. Making the nut kernels vibrate inside the nut shells and reducing the probability of adhesion between the nut kernels and the nut shells. Facilitating the operation of shelling and kernel extraction after drying.

[0030] Of course, the present application may have many other implementation manners. Based on this implementation manner, all other implementation manners obtained by those of ordinary skill in the art without any creative work fall within the scope protected by the present application.

Claims

1. A heat pump type nut drying device, characterized in that: include: An insulation chamber (1), a heat pump unit (2), and a supporting grille (3); the insulation chamber (1) is divided into a drying chamber (4), a return air chamber (5), and an air inlet chamber (6) by a partition; one side of the air inlet chamber (6) is connected to the air outlet of the heat pump unit (2), and the other side of the air inlet chamber (6) is connected to the lower part of the drying chamber (4); the upper part of the drying chamber (4) is connected to one side of the return air chamber (5), and the other side of the return air chamber (5) is connected to the air inlet of the heat pump unit (2); the drying chamber ( 4) A limit block (7) is provided at the lower part, the support grille (3) is installed at the lower part of the drying chamber (4) through the limit block (7), the support grille (3) comprises a frame (8), a guide rod (9), and a support rod (10), a plurality of the guide rods (9) are welded in parallel to the frame (8), the guide rods (9) are connected to each other through the support rods (10), the support rods (10) are located at the lower part of the guide rods (9), and both ends of the support rods (10) are connected to the frame (8).

2. A heat pump type nut drying device according to claim 1, characterized in that: The support grid (3) is installed obliquely in the drying bin (4), the guide rod (9) has an angle of 10° to 20° with the horizontal plane, and the drying bin (4) is provided with a discharge port at the lower end of the support grid (3).

3. A heat pump type nut drying device according to claim 1, characterized in that: The upper end of the guide rod (9) is flush with the end surface of the frame (8), and a recessed portion is provided at the lower portion of the frame (8), the bottom surface of the recessed portion is 5 mm to 10 mm lower than the upper end of the guide rod (9), the support rod (10) and the guide rod (9) are perpendicular to each other, and a gap of 5 mm to 12 mm is left between the guide rods (9).

4. A heat pump type nut drying device according to claim 1, characterized in that: It also comprises a plurality of horizontal air ducts (11), wherein the horizontal air ducts (11) are horizontally installed in the drying chamber (4), and one end of the horizontal air ducts (11) are connected in parallel to each other and are connected to the return air chamber (5) through the fan (12).

5. A heat pump type nut drying device according to claim 1, characterized in that: A one-way valve (13) is provided between the air inlet bin (6) and the drying bin (4).

6. A heat pump type nut drying device according to claim 1, characterized in that: A dust removal bag (14) is provided between the drying chamber (4) and the return air chamber (5).

7. A heat pump type nut drying device according to claim 1, characterized in that: Inclined triangular blocks (15) are provided on both sides of the lower end of the support grid (3).

8. A heat pump type nut drying device according to claim 1, characterized in that: A plurality of vibrating rods (16) are installed in the drying chamber (4).

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