Tea withering machine with uniform heating function

Abstract

The utility model discloses a tea leaf withering machine capable of uniformly heating. The tea leaf withering machine comprises a shell, a withering cylinder, a conveying belt, air holes, a hot air circulating system, a residue collecting groove, a temperature and humidity measuring device and a control unit, a plurality of layers of air holes which are uniformly distributed at equal intervals are respectively formed in the bottoms and the outer walls of the withering barrels from top to bottom; a plurality of air holes are uniformly distributed in the conveying belt body and the side baffles at equal intervals; hot air of the hot air circulating system synchronously heats the tea leaves on the conveying belt from the outer wall of the withering cylinder, the side baffles and the conveying belt body in multiple directions and multiple angles through the air holes; a temperature and humidity measuring device and a control unit are arranged to control the temperature and humidity in the withering machine to meet withering requirements; due to the design of the inclined residue collecting groove, fine tea residues can be automatically cleaned in time. The tea leaf withering device solves the problem of non-uniform heating, realizes uniform heating of tea leaves, controls the withering temperature and humidity, and ensures the withering quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of tea withering machines, specifically a tea withering machine that provides uniform heating. Background Technology

[0002] The processing of black tea includes withering, rolling, fermentation, and drying. Withering is a crucial step in black tea production, involving controlled temperature and humidity to induce color change and fermentation in the tea leaves. Also known as "withering," freshly picked tea leaves are evenly spread out in a specific thickness under controlled temperature and humidity conditions and allowed to dry in the sun. This process moderately promotes the activity of enzymes in the fresh leaves, causing appropriate physical and chemical changes in their internal substances, gradually resulting in the loss of moisture and a wilted appearance. This treatment helps improve the quality and taste of the tea.

[0003] For example, Chinese invention patent CN117730918A, published on March 22, 2024, discloses a hot air circulating uniform tea withering device, including a withering box with several sets of turning conveyor belts inside. An exhaust fan is located at the top of the withering box, and a hot air fan is located at the bottom. A feeding conveyor belt is fixedly connected to the outside of the withering box, and a hot air assembly is located directly below the turning conveyor belts. The hot air assembly is connected to a slag collection trough, which is situated on a support plate fixedly connected to the inner wall of the withering box. This device, through the combination of a hot air circulation system and turning conveyor belts, achieves uniform heating and turning of the tea leaves during the withering process, avoiding over-withering or under-withering of some tea leaves, thus ensuring the quality and efficiency of withering. The slag collection trough design facilitates the cleaning of fine tea residue, keeping the withering box clean. The entire device has a stable structure and can be used for a long time.

[0004] As can be seen from the above patents, when the hot air supplied by the hot air blower at the bottom of the withering box passes through the horizontally arranged turning conveyor belts, the heat will be filtered layer by layer, resulting in uneven heating; therefore, this utility model provides a tea withering machine with uniform heating to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a tea withering machine that provides uniform heating.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A uniformly heated tea withering machine includes a housing, inside which are arranged a plurality of vertical withering cylinders and a conveyor belt wrapping around the outer wall of the withering cylinders. The withering cylinders are cuboids, and the bottom and outer wall of the withering cylinders are respectively provided with a plurality of layers of air holes evenly distributed at equal intervals from top to bottom. Fixed plates are respectively connected to the top edge of the withering cylinders, and the fixed plates are connected to the front and rear inner walls of the housing. The conveyor belt includes a conveyor belt body, rollers, side baffles and partitions. The conveyor belt body enters the housing from the top of the right side wall and exits the housing from the top of the left side wall. The conveyor belt body is mounted and rotatably connected to the rollers. The rollers are arranged on the left and right sides of the top of the withering cylinders and are mounted and connected to the front and rear inner walls of the housing. The side baffles are arranged on both sides above the conveyor belt body. A plurality of air holes are evenly distributed at equal intervals on the conveyor belt body and the side baffles. A plurality of partitions are vertically arranged between the side baffles at equal intervals, and rubber pads are provided on the top of the partitions.

[0008] Preferably, the top and bottom of the side wall of the shell are respectively provided with a plurality of air outlets and hot air outlets, which are respectively connected to a hot air circulation system; a slag collection trough is provided above the bottom of the shell, and the two ends of the slag collection trough are respectively connected to the left and right inner walls of the shell. The slag collection trough is inclined at 5~10º with the horizontal direction, and a fine slag outlet is provided at the bottom of the slag collection trough and connected to a fine slag collection box.

[0009] Preferably, a temperature and humidity measuring device and a control unit are respectively provided on the top and middle parts of the outer surface of the side wall of the housing, and the control unit is electrically connected to the temperature and humidity measuring device and the hot air circulation system.

[0010] Preferably, a plurality of arc-shaped cover plates are provided above the vertical direction of the conveyor belt. The cover plate in the middle is connected to the top of the adjacent withering cylinder, and the cover plates on both sides are respectively connected to the top of the withering cylinder and the top edge of the shell. The cover plates cover the rollers, and the gap between the cover plates and the rollers is 4-6 mm larger than the height of the partition.

[0011] Preferably, the gap between the conveyor belt body and the outer wall of the withering cylinder is 4-6 mm larger than the height of the partition, and the rubber pad is disposed at the gap between the top of the partition and the outer wall of the withering cylinder.

[0012] Preferably, the gap between the partitions is between 1 / 3 and 1 / 2 of the width of the withering cylinder, and the bottom edge of the withering cylinder is arc-shaped.

[0013] The beneficial effects of this utility model are:

[0014] The machine is equipped with several vertical withering cylinders and a conveyor belt that wraps around the outer wall of the withering cylinders. The bottom and outer wall of the withering cylinders are decorated with several layers of air holes evenly distributed at equal intervals from top to bottom. Similarly, the conveyor belt body and side baffles also have evenly distributed air holes. Hot air from the hot air circulation system flows through these air holes, simultaneously heating the tea leaves on the conveyor belt from multiple directions and angles, achieving uniform heating. A temperature and humidity measuring device and control unit are included to maintain the internal temperature and humidity of the withering machine to meet withering requirements. An inclined slag collection trough automatically cleans fine tea residue in a timely manner. This invention solves the problem of uneven heating, achieving uniform heating of the tea leaves, controlling the temperature and humidity during withering, and ensuring the quality and efficiency of withering. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0017] Figure 1 This is a front view structural diagram of the present utility model;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 This is a top view of the conveyor belt structure of this utility model;

[0020] Figure 4 This is a front view structural diagram of the conveyor belt of this utility model;

[0021] The figure shows: 1. Shell; 2. Withering cylinder; 201. Fixing plate; 3. Conveyor belt; 301. Conveyor belt body; 302. Roller; 303. Side baffle; 304. Partition plate; 305. Rubber pad; 306. Cover plate; 4. Air hole; 5. Hot air circulation system; 501. Air outlet; 502. Hot air outlet; 6. Slag collection trough; 601. Fine slag outlet; 602. Fine slag collection box; 7. Temperature and humidity measuring device; 8. Control unit. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] It should be noted that similar labels and letters are likely to represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Reference Figure 1-4 The present invention discloses a uniformly heated tea withering machine, comprising a shell 1, a withering cylinder 2, a conveyor belt 3, an air hole 4, a hot air circulation system 5, a slag collection trough 6, a temperature and humidity measuring device 7, and a control unit 8.

[0029] Reference Figure 1-2 The housing 1 contains several vertically arranged withering cylinders 2. These vertically arranged rectangular withering cylinders 2 facilitate the heating of the tea leaves by hot air from bottom to top. The withering cylinders 2 are fixedly connected to the front and rear inner walls of the housing 1 by fixing plates 201 at the top left and right edges. The bottom and outer walls of the withering cylinders 2 are provided with several layers of air holes 4 evenly distributed from top to bottom. The air holes 4 are used for hot air to heat the tea leaves by passing through the bottom and outer walls of the withering cylinders 2. The outer wall of the withering cylinders 2 is wrapped with a conveyor belt 3, which includes a conveyor belt body 301, rollers 302, and side baffles 303. The conveyor belt body 301, along with the partition 304, enters the housing 1 from the top of the right side wall and exits the housing 1 from the top of the left side wall, respectively. It can transport the tea leaves to be withered from the top of the right side wall into the housing 1, and after withering, transport them out of the housing 1 from the top of the left side wall. The conveyor belt body 301 is mounted and rotatably connected to the rollers 302. The rollers 302, located on the left and right sides of the top of the withering cylinder 2, are mounted and fixed to the front and rear inner walls of the housing 1. The rollers 302 are driven and rotated by a motor (not shown in the figure). (Refer to...) Figure 3-4 Side baffles 303 are provided on both sides above the conveyor belt body 301. The side baffles 303 are used to prevent tea leaves from sliding off the conveyor belt body 301 on both sides. At the same time, several air holes 4 are evenly distributed at equal intervals on the conveyor belt body 301 and the side baffles 303. Hot air can heat the tea leaves on the conveyor belt body 301 through the air holes 4. Several equally spaced partitions 304 are vertically arranged between the side baffles 303 on both sides. Rubber pads 305 are provided on the top of the partitions 304.

[0030] In an optional embodiment, the gap between the conveyor belt body 301 and the outer wall of the withering cylinder 2 is 4-6 mm larger than the height of the partition 304. The rubber pad 305 is filled into the gap between the outer wall of the withering cylinder 2 and the top of the partition 304, which serves as a seal and buffer, so that the conveyor belt body 301 can wrap well around the outer wall of the withering cylinder 2. The bottom edge of the withering cylinder 2 is arc-shaped, which facilitates the turning of the conveyor belt body 301 at this point. The gap between the partitions 304 is between 1 / 3 and 1 / 2 of the width of the withering cylinder 2. This ensures that there are two partitions 304 when the conveyor belt body 301 is at the bottom of the withering cylinder 2, so that the conveyor belt body 301 can form a continuous conveyor belt at the bottom of the withering cylinder 2.

[0031] The top and side walls of the housing 1 are respectively provided with several air outlets 501 and hot air inlets 502 connected to the hot air circulation system 5, which are used for hot air outlet and inlet respectively; a slag collection trough 6 inclined at 5~10º to the horizontal direction is provided above the bottom of the housing 1, and the two ends of the slag collection trough 6 are respectively connected to the left and right inner walls of the housing 1. A fine slag outlet 601 is provided at the bottom of the slag collection trough 6, which is connected to a fine slag collection box 602 for automatic collection and timely cleaning of tea fine slag; an electrically connected temperature and humidity measuring device 7 and a control unit 8 are respectively provided on the top and the middle of the outer surface of the side walls of the housing 1, and the temperature and humidity of withering are jointly controlled by the control unit 8, the temperature and humidity measuring device 7 and the hot air circulation system 5.

[0032] In an optional embodiment, several arc-shaped cover plates 306 are provided above the vertical direction of the conveyor belt 3. The cover plates 306 cover the roller 302 to prevent the hot air in the roller 302 from being directly drawn away from the air outlet 501 above. The cover plate 306 in the middle is connected to the top of the adjacent withering cylinder 2, and the cover plates 306 on both sides are connected to the top of the withering cylinder 2 and the top edge of the housing 1, respectively. The gap between the cover plate 306 and the roller 302 is 4~6 mm larger than the height of the partition plate 304 to ensure that the rubber pad 305 on the top of the partition plate 304 can buffer the filling and seal the gap.

[0033] Of course, the embodiments described in this specific implementation are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A tea withering machine with uniform heating, comprising a housing (1), characterized in that: The housing (1) contains several vertical withering cylinders (2) and a conveyor belt (3) that wraps around the outer wall of the withering cylinders (2). The withering cylinders (2) are cuboids. The bottom and outer wall of the withering cylinders (2) are provided with several layers of air holes (4) evenly distributed from top to bottom. The top edge of the withering cylinders (2) is connected to a fixing plate (201), which is connected to the front and rear inner walls of the housing (1). The conveyor belt (3) includes a conveyor belt body (301), rollers (302), side baffles (303), and partitions (304). The conveyor belt body (301) enters the housing (1) from the top of the right side wall. The conveyor belt body (301) is mounted and rotatably connected to the roller (302). The roller (302) is located on the left and right sides of the top of the withering cylinder (2) and mounted and connected to the front and rear inner walls of the housing (1). The side baffles (303) are located on both sides above the conveyor belt body (301). Several air holes (4) are evenly distributed at equal intervals on the conveyor belt body (301) and the side baffles (303). Several equally spaced partitions (304) are vertically arranged between the side baffles (303). A rubber pad (305) is provided on the top of the partition (304).

2. The tea withering machine with uniform heating according to claim 1, characterized in that: The top and bottom of the side wall of the shell (1) are provided with a plurality of air outlets (501) and hot air outlets (502) respectively. The air outlets (501) and hot air outlets (502) are respectively connected to the hot air circulation system (5). A slag collection trough (6) is provided above the bottom of the shell (1). The two ends of the slag collection trough (6) are respectively connected to the left and right inner walls of the shell (1). The slag collection trough (6) is inclined at 5~10º with the horizontal direction. A fine slag outlet (601) is provided at the bottom of the slag collection trough (6) and connected to the fine slag collection box (602).

3. The tea withering machine with uniform heating according to claim 2, characterized in that: Temperature and humidity measuring device (7) and control unit (8) are respectively provided on the top and middle of the outer surface of the side wall of the housing (1). The control unit (8) is electrically connected to the temperature and humidity measuring device (7) and the hot air circulation system (5).

4. A tea withering machine with uniform heating according to claim 1, characterized in that: Several arc-shaped cover plates (306) are provided above the vertical direction of the conveyor belt (3). The cover plate (306) in the middle is connected to the top of the adjacent withering cylinder (2). The cover plates (306) on both sides are respectively connected to the top of the withering cylinder (2) and the top edge of the shell (1). The cover plate (306) covers the roller (302). The gap between the cover plate (306) and the roller (302) is 4~6 mm larger than the height of the partition plate (304).

5. A tea withering machine with uniform heating according to claim 1, characterized in that: The gap between the conveyor belt body (301) and the outer wall of the withering cylinder (2) is 4-6 mm larger than the height of the partition (304), and the rubber pad (305) is disposed at the gap between the top of the partition (304) and the outer wall of the withering cylinder (2).

6. The tea withering machine with uniform heating according to claim 1, characterized in that: The gap between the partitions (304) is between 1 / 3 and 1 / 2 of the width of the withering cylinder (2), and the bottom edge of the withering cylinder (2) is arc-shaped.

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