A heat pump dryer

Abstract

The application discloses a heat pump drying machine, which comprises a box body, a heat pump heating device and a lifting feeding device. The box body is sequentially provided with a slow recovery section, a drying section and a grain discharging section from top to bottom. The lifting feeding device comprises a material lifting mechanism and a discharging mechanism. The discharging mechanism is arranged at the top of the box body. The material lifting mechanism is used for lifting and conveying the material at the bottom of the box body to the discharging mechanism. The discharging mechanism comprises a transfer box, a side hopper and a blocking unit. The top of the transfer box is in communication with the conveying outlet of the material lifting mechanism. A grain discharging and returning port is arranged on the side wall of the transfer box. A grain discharging and discharging port is arranged at the bottom of the transfer box. The side hopper is arranged on the transfer box. The side hopper is downwardly inclined and arranged to communicate the drying feeding port with the grain discharging and returning port. The blocking unit is used for blocking or opening the grain discharging and discharging port. The heat pump drying machine only needs to control the opening or closing of the grain discharging and returning port, so that the material can be output from different positions, and the structure is simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drying equipment, in particular, relates to a heat pump dryer. BACKGROUND

[0002] Grain refers to the total of various plant seeds in cooked food, which can also be referred to as "cereal". Grain crops contain rich nutrients, mainly including protein, vitamins, dietary fiber, fat, starch and the like. The grain concept of the Food and Agriculture Organization of the United Nations refers to cereal, including wheat, beans, coarse grain and rice, etc. Grain is not only the staple food of human beings, but also an essential component of livestock feed, and the annual output and consumption are large. In order to prevent grain from mildewing and rotting, and to maintain the long-term storage quality of grain, effective drying operation is needed for the harvested grain.

[0003] The existing grain drying equipment, when operating, the material dried in the box is discharged through the drying discharge port, and the lifting mechanism lifts the material discharged from the drying discharge port to the top of the box. When the material reaches the drying standard, the material at the top is directly unloaded from the top for collection and storage; when the material does not reach the drying standard, the material at the top reenters the box from the drying inlet for re-drying. The existing grain drying equipment has a complex structure of the unloading valve for unloading or re-feeding the material at the top.

[0004] Therefore, it is necessary to provide a dryer to solve or at least alleviate the above-mentioned defects. SUMMARY

[0005] The heat pump dryer provided by the present application solves the technical problem of complex structure of the unloading valve of the existing dryer.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] A heat pump dryer includes a housing, a heat pump heating device, and a lifting and feeding device. The housing has a tempering section, a drying section, and a discharge section arranged sequentially from top to bottom. The top of the tempering section has a drying inlet, and the bottom of the discharge section has a drying outlet. The heat pump heating device provides a heat source for the drying section. The lifting and feeding device includes a material lifting mechanism and a discharge mechanism. The discharge mechanism is located at the top of the housing, and the material lifting mechanism lifts and conveys the material from the bottom of the housing to the discharge section. The feeding mechanism includes a transfer box, a side hopper, and a sealing unit. The top of the transfer box is connected to the conveying outlet of the material lifting mechanism. A grain return port is provided on the side wall of the transfer box, and a grain discharge port is provided at the bottom of the transfer box. The grain return port is located above the grain discharge port. The side hopper is located on the transfer box and is inclined downward to connect the drying inlet with the grain return port. The sealing unit is used to seal or open the grain discharge port.

[0008] Furthermore, the sealing unit includes a discharge valve body, a sealing baffle, and a push cylinder. The discharge valve body has a first clearance port and a second clearance port arranged separately from each other. The first clearance port is arranged vertically. The sealing baffle is movably arranged. The discharge valve body is located at the bottom of the transfer box and the grain discharge port is connected to the first clearance port. The push cylinder is used to drive the sealing baffle to move and position, thereby connecting or isolating the grain discharge port from the first clearance port.

[0009] Furthermore, the inner wall of the feeding valve body is provided with an installation groove for inserting and engaging with the sealing baffle.

[0010] Furthermore, the blocking unit also includes a second bucket body located at the bottom of the first clearance opening.

[0011] Furthermore, the pushing cylinder is disposed inside the second clearance opening, the pushing cylinder is located below the blocking baffle, the fixed end of the pushing cylinder is fixedly connected to the side wall of the second clearance opening, and the telescopic end of the pushing rod is fixedly connected to the bottom surface of the blocking baffle.

[0012] Furthermore, the actuating cylinder is a hydraulic cylinder.

[0013] Further, the plugging unit further comprises a roller guide assembly, the roller guide assembly comprises a lower supporting guide roller and an upper limiting guide roller, one end of the lower supporting guide roller is arranged on the lower valve body, the other end of the lower supporting guide roller protrudes from the inner wall surface of the lower valve body and is arranged to support the plugging baffle from the bottom surface of the plugging baffle, one end of the upper limiting guide roller is arranged on the lower valve body, and the other end of the upper limiting guide roller protrudes from the inner wall surface of the lower valve body and is arranged to roll the plugging baffle from the surface of the plugging baffle.

[0014] Further, the top and bottom of the lower valve body are bent to form flange connection edges.

[0015] Further, the heat pump dryer further comprises a material throwing device arranged on the top central shaft of the box body, the material throwing device is rotatably arranged around the central axis, the material throwing device comprises a bottom plate and a guide assembly arranged on the bottom plate for guiding the grains, the guide assembly comprises guide plates, the guide plates comprise arc segments and straight line segments, the extension direction of the straight line segments is the tangent direction of the end of the arc segment, the guide plates are arranged around the center of the bottom plate to form a shuttle-shaped structure, the straight line segments of the two guide plates form two ends of the shuttle-shaped structure, and the two ends of the shuttle-shaped structure are in an open type.

[0016] Further, the material throwing device further comprises scrapers arranged on the guide plates, the four scrapers are uniformly and angularly arranged, and the middle section of a group of oppositely arranged scrapers is coincident with the opening middle section of the end of the shuttle-shaped structure.

[0017] The present application has the following beneficial effects:

[0018] The heat pump drying machine provided by the application comprises a box body, a heat pump heating device and a lifting feeding device, the box body is sequentially provided with a recovery section, a drying section and a grain discharging section from top to bottom, the top of the recovery section is provided with a drying feeding inlet, the bottom of the grain discharging section is provided with a drying discharging outlet, and materials enter the box body from the drying feeding inlet at the top and are finally discharged from the drying discharging outlet at the bottom by relying on their own gravity; the heat pump heating device is used for providing a heat source for the drying section, and the materials are dried in the drying section during falling; the lifting feeding device comprises a material lifting mechanism and a discharging mechanism, the discharging mechanism is arranged at the top of the box body, the material lifting mechanism is used for lifting and conveying the materials at the bottom of the box body upwards to the discharging mechanism, the discharging mechanism comprises a transfer box, a side hopper and a blocking unit, when the materials in the falling mechanism need to re-enter the drying feeding inlet, only the grain discharging outlet needs to be blocked by the blocking unit, when the materials in the falling mechanism need to re-enter the discharge, only the grain discharging outlet needs to be opened by the blocking unit; when the grain discharging outlet is blocked by the blocking unit, only the grain discharging return port is opened, and the materials enter the drying feeding inlet through the grain discharging return port, when the grain discharging outlet is opened by the blocking unit, the grain discharging return port and the grain discharging outlet are both opened, but since the grain discharging outlet is below the grain discharging return port and at the bottom of the transfer box, the materials directly pass through the grain discharging outlet under the action of gravity and cannot enter the grain discharging return port, the heat pump drying machine only needs to control the opening or closing of the grain discharging return port, so that the materials can be output from different positions, and the structure is simple.

[0019] In addition to the objects, features and advantages described above, the application has other objects, features and advantages. The application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings constituting a part of this application are used to provide further understanding of the application, the schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings:

[0021] Figure 1 is a perspective structural schematic view of the heat pump drying machine of the preferred embodiment of the application;

[0022] Figure 2 is Figure 1 is an enlarged view of A in FIG. 5;

[0023] Figure 3 is a sectional view of the heat pump drying machine of the preferred embodiment of the application;

[0024] Figure 4 is a perspective structural schematic view of the blocking unit of the preferred embodiment of the application;

[0025] Figure 5 is Figure 4 is a sectional view of the blocking unit in

[0026] Figure 6 is Figure 3 is a perspective structural schematic view of the throwing mechanism in

[0027] Figure 7 is Figure 6 is a working effect view of the throwing mechanism in

[0028] Legend:

[0029] 100, heat pump dryer; 10, box body; 20, heat pump heating device; 30, lifting and feeding device; 31, lifting mechanism; 32, discharging mechanism; 321, transfer box; 322, side hopper; 323, blocking unit; 3231, discharging valve body; 3232, blocking baffle; 3233, pushing cylinder; 3234, roller assembly; 40, material throwing device; 41, bottom plate; 42, guide assembly; 43, scraper. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0033] In addition, the description of "first", "second", etc. in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0034] As Figure 1 , Figure 2 and Figure 3 shown, the heat pump dryer 100 of the present embodiment comprises a cabinet 10, a heat pump heating device 20 and a lifting feeding device 30, the cabinet 10 is sequentially provided with a recovery section, a drying section and a grain discharging section from top to bottom, the top of the recovery section is provided with a drying feeding port, the bottom of the grain discharging section is provided with a drying discharging port, the heat pump heating device is used to provide heat source for the drying section, the lifting feeding device 30 comprises a material lifting mechanism 31 and a discharging mechanism 32, the discharging mechanism 32 is arranged at the top of the cabinet 10, the material lifting mechanism 31 is used to lift and convey the material at the bottom of the cabinet 10 upward to the discharging mechanism 32, the discharging mechanism 32 comprises a transfer box 321, a side hopper 322 and a blocking unit 323, the top of the transfer box 321 is in communication with the conveying outlet of the material lifting mechanism 31, the sidewall of the transfer box 321 is provided with a grain discharging return port, the bottom of the transfer box 321 is provided with a grain discharging discharge port, the grain discharging return port is arranged above the grain discharging discharge port, the side hopper 322 is arranged on the transfer box 321, the side hopper 322 is inclined downward to communicate the drying feeding port with the grain discharging return port, and the blocking unit 323 is used to block or open the grain discharging discharge port.

[0035] The heat pump dryer 100 provided by the application comprises a box body 10, a heat pump heating device 20 and a lifting feeding device 30, the box body 10 is sequentially provided with a recovery section, a drying section and a grain discharging section from top to bottom, the top of the recovery section is provided with a drying feeding port, the bottom of the grain discharging section is provided with a drying discharging port, and the material enters the box body 10 from the drying feeding port at the top, falls by gravity and is finally discharged from the drying discharging port at the bottom; the heat pump heating mechanism is used for providing a heat source for the drying section, and the material is dried in the drying section during falling; the lifting feeding device 30 comprises a material lifting mechanism 31 and a discharging mechanism 32, the discharging mechanism 32 is arranged at the top of the box body 10, the material lifting mechanism 31 is used for lifting and conveying the material at the bottom of the box body 10 upwards to the discharging mechanism 32, the discharging mechanism 32 comprises a transfer box 321, a side hopper 322 and a blocking unit 323, when the material in the falling mechanism needs to re-enter the drying feeding port, only the grain discharging discharge port needs to be blocked by the blocking unit 323, when the material in the falling mechanism needs to re-enter the discharge, only the grain discharging discharge port needs to be opened by the blocking unit 323; when the grain discharging discharge port is blocked by the blocking unit 323, only the grain discharging return port is opened, and the material enters the drying feeding port through the grain discharging return port, when the grain discharging discharge port is opened by the blocking unit 323, the grain discharging return port and the grain discharging discharge port are both opened, but since the grain discharging discharge port is below the grain discharging return port and at the bottom of the transfer box 321, the material directly discharges through the grain discharging discharge port under the action of gravity and does not enter the grain discharging return port, the heat pump dryer 100 of the application only needs to control the opening or closing of the grain discharging return port, so that the material can be output from different positions, and the structure is simple.

[0036] As shown in Figure 4 and Figure 5 further, in order to facilitate operation, the blocking unit 323 comprises a discharging valve body 3231, a blocking baffle 3232 and a pushing cylinder 3233, the discharging valve body 3231 has a first avoiding port and a second avoiding port which are arranged to be separated from each other, the first avoiding port is arranged vertically, the blocking baffle 3232 is movably arranged, the discharging valve body 3231 is arranged at the bottom of the transfer box 321 and the grain discharging discharge port and the first avoiding port are arranged to be penetrated, and the pushing cylinder 3233 is used for driving the blocking baffle 3232 to move and position, so that the grain discharging discharge port and the first avoiding port are communicated or separated.

[0037] Further, in order to improve the stability of the sliding of the blocking baffle 3232, the inner side wall surface of the discharging valve body 3231 is provided with a mounting groove for plug-in cooperation with the blocking baffle 3232.

[0038] Further, in order to guide the material to be discharged and collected, the blocking unit 323 further comprises a second hopper arranged at the bottom of the first avoiding port.

[0039] Further, the pushing cylinder 3233 is arranged in the second avoiding port, the pushing cylinder 3233 is arranged at the lower side of the blocking baffle 3232, the fixed end of the pushing cylinder 3233 is fixedly connected with the side wall of the second avoiding port, and the telescopic end of the pushing rod is fixedly connected with the bottom surface of the blocking baffle 3232. In the present application, the pushing cylinder 3233 is arranged at the lower side of the blocking baffle 3232, so that the telescopic end of the pushing cylinder 3233 is not easily interfered by the material, the use is convenient, and the service life of the pushing cylinder 3233 is improved.

[0040] Optionally, the pushing cylinder 3233 is a hydraulic cylinder or an electric cylinder.

[0041] Further, in order to ensure the stability of the horizontal movement of the blocking baffle 3232, the blocking unit 323 further comprises a roller guide assembly, the roller guide assembly comprises a lower supporting guide roller and an upper limiting guide roller, one end of the lower supporting guide roller is arranged on the discharge valve body 3231, the other end of the lower supporting guide roller protrudes from the inner wall of the discharge valve body 3231 and is arranged to support the blocking baffle 3232 from the bottom surface of the blocking baffle 3232, one end of the upper limiting guide roller is arranged on the discharge valve body 3231, and the other end of the upper limiting guide roller protrudes from the inner wall of the discharge valve body 3231 and is arranged to roll the blocking baffle 3232 from the surface of the blocking baffle 3232.

[0042] Further, the top and bottom of the discharge valve body 3231 are bent to form flange connection edges.

[0043] As shown in Figure 3 and Figure 6 Further, the continuous grain drying equipment further comprises a grain throwing mechanism arranged on the middle shaft at the top of the box body 10, the grain throwing mechanism is rotatably arranged around the middle axis, the grain throwing mechanism comprises a bottom plate 41 and a guide assembly 42 arranged on the bottom plate 41 for guiding the grain, the guide assembly 42 comprises a guide plate, the guide plate comprises an arc segment and a straight segment, the extension direction of the straight segment is the tangent direction of the end of the arc segment, the guide plate is arranged around the center of the bottom plate 41 to form a shuttle-shaped structure, the straight segments of the two guide plates form two ends of the shuttle-shaped structure, and the two ends of the shuttle-shaped structure are in an open type.

[0044] Further, in order to improve the uniformity of the downward scattering, the grain scattering mechanism further comprises a scraper 43 arranged on the guide plate 42, and four of the scrapers 43 are arranged at uniform intervals, wherein the middle section of the oppositely arranged scrapers 43 coincides with the opening middle section of the end of the shuttle-shaped structure. It can be understood that the grain scattering mechanism receives the material delivered by the drying inlet and scatters the material. Referring to FIG. 7, in the present application, the scattering mechanism is arranged on the top of the storage box to store the material, and it is found that, by arranging the grain scattering mechanism comprising the bottom plate 41, the guide assembly 42 and the scraper 43, the top of the stored material after the scattering mechanism scatters the material is relatively uniform, and the problem of the material being obliquely stacked as shown by the dotted line a or the dotted line b does not occur.

[0045] The preferred embodiments of the present application have been described above with the aid of drawings, but those skilled in the art, upon perusal of the application disclosure will be able to devise modifications or improvements without departing from the scope of the application.

Claims

1. A heat pump dryer, characterized in that, The device includes a housing, a heat pump heating unit, and a lifting and feeding device. The housing, from top to bottom, comprises a tempering section, a drying section, and a grain discharge section. The top of the tempering section has a drying inlet, and the bottom of the grain discharge section has a drying outlet. The heat pump heating unit provides a heat source for the drying section. The lifting and feeding device includes a material lifting mechanism and a discharging mechanism. The discharging mechanism is located at the top of the box, and the material lifting mechanism is used to lift the material at the bottom of the box upwards and convey it to the discharging mechanism. The feeding mechanism includes a transfer box, a side hopper, and a sealing unit. The top of the transfer box is connected to the conveying outlet of the material lifting mechanism. A grain return port is provided on the side wall of the transfer box, and a grain discharge port is provided at the bottom of the transfer box. The grain return port is located above the grain discharge port. The side hopper is mounted on the transfer box and is inclined downwards to connect the drying inlet to the grain return port. The sealing unit is used to seal or open the grain discharge port. The sealing unit includes a discharge valve body, a sealing baffle, and a push cylinder. The discharge valve body has a first clearance port and a second clearance port arranged separately from each other. The first clearance port is arranged vertically. The sealing baffle is movably arranged. The discharge valve body is located at the bottom of the transfer box, and the grain discharge port is connected to the first clearance port. The push cylinder is used to drive the sealing baffle to move and position, thereby connecting or disconnecting the grain discharge port from the first clearance port. The inner wall of the feeding valve body is provided with a mounting groove for inserting and engaging with the sealing baffle. The sealing unit also includes a second bucket body located at the bottom of the first clearance opening. The push cylinder is disposed within the second clearance opening, located below the blocking baffle. The fixed end of the push cylinder is fixedly connected to the side wall of the second clearance opening, and the telescopic end of the push cylinder is fixedly connected to the bottom surface of the blocking baffle. The sealing unit further includes a roller guide assembly, which includes a lower support guide roller and an upper limit guide roller. One end of the lower support guide roller is disposed on the feeding valve body, and the other end of the lower support guide roller protrudes from the inner wall surface of the feeding valve body, for supporting the sealing baffle from the bottom surface of the sealing baffle. One end of the upper limit guide roller is disposed on the feeding valve body, and the other end of the upper limit guide roller protrudes from the inner wall surface of the feeding valve body, for rolling the sealing baffle from the surface of the sealing baffle.

2. The heat pump dryer according to claim 1, characterized in that, The actuating cylinder is a hydraulic cylinder.

3. The heat pump dryer according to claim 1, characterized in that, The top and bottom perimeters of the discharge valve body are bent to form flange connection edges.

4. The heat pump dryer according to any one of claims 1 to 3, characterized in that, The heat pump dryer also includes a material throwing device located on the central axis at the top of the housing, the material throwing device being rotatably arranged around the central axis. The material spreading device includes a base plate and a guide assembly disposed on the base plate for guiding the grain. The guide assembly includes a guide plate, which includes an arc segment and a straight segment. The straight segment extends in the direction of the tangent at the end of the arc segment. The guide plate is arranged around the center of the base plate to form a spindle-shaped structure. The straight segments of the two guide plates form the two ends of the spindle-shaped structure, and the two ends of the spindle-shaped structure are open.

5. The heat pump dryer according to claim 4, characterized in that, The material dispensing device also includes scrapers mounted on the guide plate, with the four scrapers arranged at evenly spaced angles. The mid-section of a set of scrapers arranged opposite each other coincides with the mid-section of the opening at the end of the shuttle-shaped structure.

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