Self-cleaning preparation device and method of blueberry and mint essence

Abstract

The invention relates to the technical field of essence preparation equipment, in particular to a self-cleaning preparation device and method for blueberry and mint essence, the self-cleaning preparation device comprises a mixing tank, at least three supporting legs are fixed to the lower portion of the mixing tank in an annular array mode, and an electric control box is fixed to the middle of the outer side wall of the mixing tank; a discharging pipe penetrating into an inner cavity of the mixing tank body is fixed to the lower end face of the mixing tank body, a stirring device is fixed to the center of the interior of the mixing tank body, a cleaning device is fixed to the inner side wall of the mixing tank body, and a material injection pipe and a maintenance manhole are fixed to a top cover of the mixing tank body. And the center of the bottom in the mixing tank body protrudes upwards to form an inner boss. The stirring mechanism has the beneficial effects that the orientation of the stirring paddle can be adjusted according to different rotating speeds of the rotating shaft, and when the stirring paddle rotates, the notch grooves in the stirring paddle can influence the stability of fluid, so that unstable turbulent flow is formed, and materials can be uniformly and quickly mixed.

Description

Technical Field

[0001] The invention relates to the technical field of flavor preparation equipment, and in particular to a self-cleaning preparation device and method for blueberry mint flavor. Background Art

[0002] The production process of flavors includes the formulation of formulas and the preparation process of mass production. The determination of the flavor type of the flavor is mainly solved by the formulation of the formula, while the form of the flavor is mainly achieved through specific processes in mass production. In the production of blueberry-flavored juice drinks, it is often necessary to add blueberry flavor to supplement the aroma so that consumers can feel the flavor of fresh blueberries. Blueberry mint flavor is a food additive prepared by mixing blueberry essential oil, mint essential oil, triacetin, pectin and other ingredients. When preparing blueberry mint flavor, just put all the raw materials into a mixing tank and stir them thoroughly.

[0003] At present, most blueberry micro-mint flavors are directly prepared through a reactor with a stirring device. For example, the Chinese patent with application number 202122858848.6 discloses a flavor and fragrance reactor, including a stirring shaft, on which a first stirring component, a second stirring component, and a third stirring component are arranged longitudinally from top to bottom; the first stirring component and the second stirring component are respectively provided with a number of stirring rods; the third stirring component is a stirring paddle; on the stirring shaft, a disk is arranged between adjacent stirring components. The mixing process of the flavor is intervened by the stirring structure to break the phenomenon of the flavor clumping into large molecules. Although the above-mentioned device can realize the stirring preparation of the flavor, some raw materials are prone to adhere to the inner wall of the tank during the preparation process and cannot be cleaned in time, affecting the next production and processing. Summary of the invention

[0004] The present invention is to solve the above problems and proposes a self-cleaning preparation device and method for blueberry mint essence.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A self-cleaning preparation device for blueberry mint essence, comprising a mixing tank body, at least three supporting legs are fixed in a circular array below the mixing tank body, an electric control box is fixed in the middle of the outer wall of the mixing tank body, a discharge pipe penetrating into the inner cavity of the mixing tank body is fixed on the lower end surface of the mixing tank body, a stirring device is fixed in the center of the mixing tank body, a cleaning device is fixed on the inner wall of the mixing tank body, a material injection pipe and a maintenance manhole are fixed on the top cover of the mixing tank body, and the center of the bottom of the mixing tank body protrudes upward to form an inner boss;

[0007] The stirring device comprises a rotating shaft rotatably mounted between the inner boss and the top cover of the mixing tank body, a reducer mounted above the top cover of the mixing tank body, the reducer is transmission-connected to the rotating shaft, a stirring motor transmission-connected to its power input end is fixed above the reducer, a plurality of stirring mechanisms are fixed along the length direction of the rotating shaft, and the spacing between adjacent stirring mechanisms is adjustable;

[0008] The cleaning device includes two transmission screws and two sliding optical shafts. A driving motor connected to the transmission screw and transmission rod is fixed on the top cover of the mixing tank body. The two transmission screws and the two sliding optical shafts are respectively fixed inside the mixing tank body near its inner wall. A ball sleeve is rotatably installed on each of the transmission screws, and a guide sleeve is slidably installed on each of the sliding optical shafts. All of the ball sleeves and guide sleeves are fixed on a connecting ring, and the connecting ring is concentrically arranged with the inner wall of the mixing tank body. A rubber scraper is fixed to the side of the connecting ring close to the inner wall of the mixing tank body through a detachable connection. The rubber scraper is in sliding contact with the inner wall of the mixing tank body. The stirring motor and the driving motor are electrically connected to the electric control box.

[0009] Furthermore, the rubber scraper includes a clamping plate installed in cooperation with the connecting ring, and a lip plate is formed on the upper and lower ends of one side of the clamping plate close to the inner wall of the mixing tank body, and the two lip plates are arranged in a “>” shape.

[0010] Furthermore, at least one ultrasonic transducer is embedded on the inner boss, the ultrasonic transducer is electrically connected to the electric control box, and the working surface of the ultrasonic transducer is inserted into the inner cavity of the mixing tank.

[0011] Furthermore, the mixing tank body includes an inner tank body, an outer insulation tank body is fixed to the outside of the inner tank body, an insulation compartment is formed between the inner tank body and the outer insulation tank body, a heat exchange tube is fixed in the cavity between the inner tank body and the outer insulation tank body, and a temperature sensor with a probe inserted into the inner tank body is fixed on the outer wall of the mixing tank body.

[0012] Furthermore, the stirring mechanism includes a sliding sleeve installed in sliding cooperation with the rotating shaft, a locking screw for fixing the sliding sleeve to the outer wall of the rotating shaft is threadedly installed on the outer wall of the sliding sleeve, two ball head seats are symmetrically fixed on the outer wall of the sliding sleeve, a plurality of expansion grooves are opened in the circumferential direction on the end of the ball head seat away from the rotating shaft, a locking nut is threadedly installed on the outer side wall of the ball head seat away from the rotating shaft, a rotating ball head is rotatably installed on the end of the ball head seat away from the rotating shaft, a connecting arm is integrally formed on the side wall of the rotating ball head, and a stirring paddle is fixed on the end of the connecting arm away from the rotating ball head.

[0013] Furthermore, one side of the stirring paddle is a hemispherical part, and the other side of the stirring paddle is a pointed cone part, the thickness of the pointed cone part is smaller than that of the hemispherical part, two gyratory parts are symmetrically formed on both sides of the pointed cone part, and the gyratory part and the hemispherical part are streamlined. The gyratory part is formed with a plurality of notches along the length direction of the stirring paddle.

[0014] A method for preparing a blueberry mint flavor comprises the following steps:

[0015] Step 1: Add the raw materials into the mixing tank according to the proportion;

[0016] Step 2: inject cold water into the insulation compartment, and then heat the cold water through the high-temperature heat transfer oil flowing through the heat exchange tube to keep it at 25-30°C;

[0017] Step 3, start the stirring motor, rotate and stir at a speed of 100 rpm for 5-10 minutes, and then rotate and stir at a speed of 200 rpm for 20-30 minutes;

[0018] Step 4: Drain the liquid, inject clean water into the tank, and start the stirring device and ultrasonic transducer to clean the tank.

[0019] Furthermore, in the step three, after stirring at a speed of 100 rpm for 2-3 minutes, the drive motor is started to drive the transmission screw to rotate, and then drive the rubber scraper to move from top to bottom along the inner wall of the inner tank to clean the material adhering to the inner wall of the tank. When it moves to the bottom of the inner tank, the drive motor is started in reverse to drive the rubber scraper to move upward back to its original position.

[0020] Furthermore, in step 4, when cleaning the tank body, the rubber scraper is driven by the driving motor to move up and down reciprocatingly for at least one cycle to clean the raw materials on the inner wall of the tank body.

[0021] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the driving motor can drive the rubber scraper to slide up and down to clean the materials adhered to the inner wall of the inner tank during the mixing process and when cleaning the tank body, which is convenient for both material mixing and cleaning of the tank body after preparation; the foldable stirring mechanism automatically droops under the action of gravity when not in use, reducing the occupied space, increasing the free space in the tank body, and facilitating personnel entry during equipment maintenance; the stirring mechanism can adjust the direction of the stirring paddle with the different rotation speeds of the shaft, and when the stirring paddle rotates, the notch groove on the stirring paddle can affect the stability of the fluid, forming unstable turbulence to facilitate uniform and rapid mixing of the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 is a first stereogram of the present invention;

[0024] Figure 2 is a second stereogram of the present invention;

[0025] Figure 3 It is a front view of the present invention;

[0026] Figure 4 is a main cross-sectional view of the present invention;

[0027] Figure 5 is a front view of the present invention after removing the stirring device;

[0028] Figure 6 is a three-dimensional diagram of the stirring mechanism of the present invention;

[0029] Figure 7 is a main sectional view of the stirring mechanism of the present invention;

[0030] Figure 8 is a three-dimensional diagram of a stirring paddle of the present invention;

[0031] Fig. 9 is a front view of the stirring paddle of the present invention;

[0032] Fig.10 is a top view of the cleaning device of the present invention;

[0033] Fig.11 is a cross-sectional view of a rubber scraper of the present invention;

[0034] Fig.12 It is a circuit structure block diagram of the present invention.

[0035] The following are the descriptions of the reference numerals:

[0036] 1. Mixing tank; 11. Inner tank; 12. Outer insulation tank; 13. Heat exchange tube; 14. Temperature sensor; 2. Support legs; 3. Electric control box; 4. Stirring device; 41. Rotating shaft; 42. Reducer; 43. Stirring motor; 44. Stirring mechanism; 441. Sliding sleeve; 442. Ball seat; 443. Expansion slot; 444. Locking nut; 445. Rotating ball head; 446. Locking screw; 447. Connecting arm; 448 , stirring paddle; 4481, hemispherical part; 4482, pointed cone part; 4483, conical part; 4484, notch groove; 5, cleaning device; 51, transmission screw; 52, sliding optical axis; 53, ball sleeve; 54, guide sleeve; 55, connecting ring; 56, rubber scraper; 561, clamping plate; 562, lip plate; 57, driving motor; 6, discharge pipe; 7, injection pipe; 8, maintenance manhole; 9, inner boss; 10, ultrasonic transducer. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1-Figure 12 As shown, a self-cleaning preparation device of blueberry micro-mint flavor comprises a mixing tank body 1, at least three supporting legs 2 are fixed in a circular array below the mixing tank body 1, an electric control box 3 is fixed in the middle of the outer wall of the mixing tank body 1 for controlling the operation of the electrical equipment, a discharge pipe 6 penetrating into the inner cavity of the mixing tank body 1 is fixed on the lower end surface of the mixing tank body 1 for discharging the mixed flavor and clean waste water, a stirring device 4 is fixed in the center of the mixing tank body 1, and the stirring device 4 can be used to stir and mix the materials, a cleaning device 5 is fixed on the inner wall of the mixing tank body 1 for cleaning the inner wall of the tank body, a material injection pipe 7 and a maintenance manhole 8 are fixed on the top cover of the mixing tank body 1, and an inner boss 9 is formed by upwardly protruding from the center of the bottom of the mixing tank body 1;

[0039] The stirring device 4 includes a rotating shaft 41 rotatably installed between the inner boss 9 and the top cover of the mixing tank body 1, and a reducer 42 installed above the top cover of the mixing tank body 1. The reducer 42 is connected to the rotating shaft 41 in a transmission manner. A stirring motor 43 connected to its power input end is fixed above the reducer 42. A plurality of stirring mechanisms 44 are fixed along the length direction of the rotating shaft 41. The spacing between adjacent stirring mechanisms 44 is adjustable. The number of stirring mechanisms 44 can be selected according to the single processing capacity set in the mixing tank body 1. The corresponding number of stirring mechanisms 44 are fixed on the rotating shaft 41, and the stirring motor 43 is started after adjusting their corresponding positions. The stirring motor can drive the rotating shaft 41 to rotate and then drive the stirring mechanism 44 to rotate to complete the mixing of the materials.

[0040] The cleaning device 5 includes two transmission screws 51 and two sliding optical shafts 52. A driving motor 57 connected to the transmission screw 51 is fixed on the top cover of the mixing tank body 1. The two transmission screws 51 and the two sliding optical shafts 52 are respectively fixed inside the mixing tank body 1 near its inner wall. The two transmission screws 51 and the two sliding optical shafts 52 are staggered. A ball sleeve 53 is rotatably installed on each transmission screw 51, and a guide sleeve 54 is slidably installed on each sliding optical shaft 52. All ball sleeves 53 and guide sleeves 54 are fixed on a connecting ring 55. When the two driving motors 57 drive the two transmission screws 51 to rotate synchronously, the two ball sleeves 53 can drive the connecting ring 55 to move up and down. The connecting ring 55 is concentrically arranged with the inner wall of the mixing tank body 1. A rubber scraper 56 is fixed to the side of the connecting ring 55 close to the inner wall of the mixing tank body 1 through a detachable connection. The rubber scraper 56 is in sliding contact with the inner wall of the mixing tank body 1. As the connecting ring 55 moves up and down, the rubber scraper 56 can scrape off the material adhered to the inner wall of the mixing tank body 1 to reduce material residue. The stirring motor 43 and the driving motor 57 are electrically connected to the electrical control box 3.

[0041] In this embodiment, the rubber scraper 56 includes a clamping plate 561 installed in cooperation with the connecting ring 55. The clamping plate 561 is formed with a lip plate 562 at the upper and lower ends of one side close to the inner wall of the mixing tank body 1. The two lip plates 562 are arranged in a “>” shape. The upper and lower lip plates 562 are in contact with the inner wall of the mixing tank body 1 to ensure that the rubber scraper 56 can clean the inner wall of the tank body when moving up and down.

[0042] In this embodiment, at least one ultrasonic transducer 10 is embedded on the inner boss 9, and the ultrasonic transducer 10 is electrically connected to the electrical control box 3. The working surface of the ultrasonic transducer 10 is inserted into the inner cavity of the mixing tank body 1. During the mixing and cleaning process, the ultrasonic transducer 10 can cause high-frequency vibration of the liquid inside the tank body, which can accelerate the mixing speed of the materials during mixing, and can clean up the materials adhering to the inner wall of the tank body and dissolve them into the clean water to reduce residues.

[0043] In this embodiment, the mixing tank body 1 includes an inner tank body 11, and an outer insulation tank body 12 is fixed to the outside of the inner tank body 11. An insulation compartment is formed between the inner tank body 11 and the outer insulation tank body 12. A heat-conducting medium is stored in the insulation compartment. Preferably, pure water or heat-conducting oil is used. A heat exchange tube 13 is fixed in the cavity between the inner tank body 11 and the outer insulation tank body 12. The heat-conducting medium in the heat exchange tube 13 is different from the heat-conducting medium in the insulation compartment. When the heat-conducting medium flows through the heat exchange tube 13, the heat-conducting medium in the insulation compartment can be heated or cooled. A temperature sensor 14 with a probe inserted into the inner tank body 11 is fixed on the outer wall of the mixing tank body 1.

[0044] In this embodiment, the stirring mechanism 44 includes a sliding sleeve 441 that is slidably mounted with the rotating shaft 41. A locking screw 446 that fixes the sliding sleeve 441 to the outer wall of the rotating shaft 41 is threadedly mounted on the outer wall of the sliding sleeve 441. Two ball head seats 442 are symmetrically fixed on the outer wall of the sliding sleeve 441. A plurality of expansion grooves 443 are provided along the circumferential direction on the end of the ball head seat 442 away from the rotating shaft 41. A locking nut 444 is threadedly mounted on the outer wall of the end of the ball head seat 442 away from the rotating shaft 41. A rotating ball head 445 is rotatably mounted on the end of the ball head seat 442 away from the rotating shaft 41. A connecting arm 447 is integrally formed on the side wall of the rotating ball head 445. A stirring paddle 448 is fixed to the end of the connecting arm 447 away from the rotating ball head 445. The sliding sleeve 441 can be adjusted by the locking screw 446. The position and fixed angle of the stirring paddle 448 are convenient for adjusting the position and angle of the stirring paddle 448. The locking nut 444 can be used to quickly install and disassemble the rotating ball head 445 and the ball head seat 442. The stirring paddle 448 can adjust the angle by rotating the ball head 445 and the ball head seat 442. When the stirring motor 43 is not started, the stirring paddle 448 automatically droops under the action of gravity to reduce space occupancy, which is convenient for increasing the activity space in the tank body. When the stirring paddle 448 rotates with the rotation of the rotating shaft 41, under the action of the centrifugal force generated by the rotation of the rotating shaft 41 and the fluid resistance in the inner tank body 11, the direction of the stirring paddle 448 (the angle between the stirring paddle 448 and the rotating shaft 41, the cross-sectional direction of the stirring paddle 448) will automatically change, and the mixing of the material and water will be accelerated during the change process.

[0045] In this embodiment, one side of the stirring paddle 448 is a hemispherical portion 4481, and the other side of the stirring paddle 448 is a pointed cone portion 4482. The thickness of the pointed cone portion 4482 is less than that of the hemispherical portion 4481. Two swirling portions 4483 are symmetrically formed on both sides of the pointed cone portion 4482. The swirling portion 4483 and the hemispherical portion 4481 are streamlined in design. During the rotation of the rotating shaft 41, the stirring paddle 448 will automatically rotate so that the pointed cone portion 4482 faces the rotation direction. The fluid flows along the pointed cone portion 4482 to the hemispherical portion 4481, and diffuses outward to form floccules after hitting the swirling portion 4483, which increases the influence range of the stirring paddle 448 when it rotates, thereby accelerating the dissolution and mixing of the materials.

[0046] In this embodiment, the vortex portion 4483 is formed with a plurality of notched grooves 4484 along the length direction of the stirring paddle 448. After the fluid flowing from the pointed cone portion 4482 to the vortex portion 4483 touches the vortex portion 4483, part of the fluid changes its flow direction and flows through the edge of the vortex portion 4483, while part of the fluid flows out from the notched grooves 4484. At the same time, the fluid is broken and dispersed into multiple beams, forming unstable turbulence, thereby accelerating the mixing speed of the materials.

[0047] A method for preparing a blueberry mint flavor comprises the following steps:

[0048] Step 1: Add the raw materials into the mixing tank 1 according to the proportion;

[0049] Step 2: inject cold water into the heat-insulating compartment, and then heat the cold water through the high-temperature heat-conducting oil flowing through the heat exchange tube 13 to keep it at 25-30°C;

[0050] Step 3, start the stirring motor 43, rotate and stir at a speed of 100 rpm for 5-10 minutes, and then rotate and stir at a speed of 200 rpm for 20-30 minutes;

[0051] Step 4: drain the liquid, inject clean water into the tank body and start the stirring device 4 and the ultrasonic transducer 10 to clean the tank body.

[0052] In this embodiment, in step three, after stirring at a speed of 100 rpm for 2-3 minutes, the drive motor 57 is started to drive the transmission screw 51 to rotate and then drive the rubber scraper 56 to move from top to bottom along the inner wall of the inner tank body 11 to clean the material adhering to the inner wall of the tank body. After moving to the bottom of the inner tank body 11, the drive motor 57 is started in reverse to drive the rubber scraper 56 to move upward and return to its original position.

[0053] In this embodiment, in step 4, when cleaning the tank body, the rubber scraper 56 is driven by the driving motor to move up and down reciprocatingly for at least one cycle to clean the raw materials on the inner wall of the tank body.

[0054] The circuit connection involved in the present invention is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to the widely used existing technology.

[0055] Components not described in detail herein are prior art.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-cleaning preparation device for blueberry mint flavor, characterized in that: It comprises a mixing tank body (1), at least three supporting legs (2) are fixed in a circular array below the mixing tank body (1), an electric control box (3) is fixed in the middle of the outer wall of the mixing tank body (1), a discharge pipe (6) is fixed on the lower end surface of the mixing tank body (1) and penetrates into the inner cavity of the mixing tank body (1), a stirring device (4) is fixed in the center of the interior of the mixing tank body (1), a cleaning device (5) is fixed on the inner wall of the mixing tank body (1), a material injection pipe (7) and a maintenance manhole (8) are fixed on the top cover of the mixing tank body (1), and the center of the inner bottom of the mixing tank body (1) protrudes upward to form an inner boss (9); The stirring device (4) comprises a rotating shaft (41) rotatably mounted between the inner boss (9) and the top cover of the mixing tank body (1), and a reducer (42) mounted above the top cover of the mixing tank body (1), wherein the reducer (42) is transmission-connected to the rotating shaft (41), and a stirring motor (43) transmission-connected to its power input end is fixed above the reducer (42), and a plurality of stirring mechanisms (44) are fixed along the length direction of the rotating shaft (41), and the spacing between adjacent stirring mechanisms (44) is adjustable; The cleaning device (5) comprises two transmission screws (51) and two sliding optical shafts (52); a driving motor (57) connected to the transmission screws (51) and the transmission rods is fixed on the top cover of the mixing tank body (1); the two transmission screws (51) and the two sliding optical shafts (52) are respectively fixed at positions inside the mixing tank body (1) close to the inner wall thereof; a ball sleeve (53) is rotatably mounted on each transmission screw (51); and a guide sleeve (53) is slidably mounted on each sliding optical shaft (52). 54), all of the ball sleeves (53) and the guide sleeves (54) are fixed on a connecting ring (55), the connecting ring (55) is arranged concentrically with the inner wall of the mixing tank body (1), a rubber scraper (56) is fixed to the side of the connecting ring (55) close to the inner wall of the mixing tank body (1) through a detachable connection, the rubber scraper (56) is in sliding contact with the inner wall of the mixing tank body (1), and the stirring motor (43) and the driving motor (57) are electrically connected to the electric control box (3).

2. The self-cleaning preparation device of blueberry mint flavor according to claim 1, characterized in that: The rubber scraper (56) comprises a clamping plate (561) mounted in cooperation with the connecting ring (55), and a lip plate (562) is formed on the upper and lower ends of one side of the clamping plate (561) close to the inner wall of the mixing tank body (1), and the two lip plates (562) are arranged in a ">" shape.

3. The self-cleaning preparation device of blueberry mint flavor according to claim 1, characterized in that: At least one ultrasonic transducer (10) is embedded on the inner boss (9), the ultrasonic transducer (10) is electrically connected to the electric control box (3), and the working surface of the ultrasonic transducer (10) is inserted into the inner cavity of the mixing tank body (1).

4. The self-cleaning preparation device of blueberry mint flavor according to claim 1, characterized in that: The mixing tank body (1) comprises an inner tank body (11), an outer heat-insulating tank body (12) is fixed outside the inner tank body (11), a heat-insulating compartment is formed between the inner tank body (11) and the outer heat-insulating tank body (12), a heat exchange tube (13) is fixed in the cavity between the inner tank body (11) and the outer heat-insulating tank body (12), and a temperature sensor (14) is fixed on the outer wall of the mixing tank body (1), the probe of which is inserted into the interior of the inner tank body (11).

5. The self-cleaning preparation device of blueberry mint flavor according to claim 1, characterized in that: The stirring mechanism (44) comprises a sliding sleeve (441) slidably mounted with the rotating shaft (41); a locking screw (446) is threadedly mounted on the outer wall of the sliding sleeve (441) for fixing the sliding sleeve (441) to the outer wall of the rotating shaft (41); two ball head seats (442) are symmetrically fixed on the outer wall of the sliding sleeve (441); a plurality of grooves are formed along the circumferential direction at one end of the ball head seat (442) away from the rotating shaft (41). An expansion groove (443), a locking nut (444) is threadedly installed on the outer wall of one end of the ball head seat (442) away from the rotating shaft (41), a rotating ball head (445) is rotatably installed on the end of the ball head seat (442) away from the rotating shaft (41), a connecting arm (447) is integrally formed on the side wall of the rotating ball head (445), and a stirring paddle (448) is fixed to the end of the connecting arm (447) away from the rotating ball head (445).

6. The self-cleaning preparation device of blueberry mint flavor according to claim 5, characterized in that: One side of the stirring paddle (448) is a hemispherical portion (4481), and the other side of the stirring paddle (448) is a pointed cone portion (4482). The thickness of the pointed cone portion (4482) is smaller than that of the hemispherical portion (4481). Two gyratory portions (4483) are symmetrically formed on both sides of the pointed cone portion (4482). The gyratory portion (4483) and the hemispherical portion (4481) are streamlined in design.

7. The self-cleaning preparation device of blueberry mint flavor according to claim 6, characterized in that: The swirling portion (4483) is formed with a plurality of notched grooves (4484) along the length direction of the stirring paddle (448).

8. The self-cleaning preparation device of blueberry mint flavor according to claim 1, characterized in that: The method for preparing blueberry mint essence using the self-cleaning preparation device comprises the following steps: Step 1: Add the raw materials into the mixing tank (1) according to the proportion; Step 2: inject cold water into the heat-insulating compartment, and then heat the cold water through the high-temperature heat-conducting oil flowing through the heat exchange tube (13) to keep it at 25-30°C; Step 3, start the stirring motor (43), rotate and stir at a speed of 100 rpm for 5-10 minutes, and then rotate and stir at a speed of 200 rpm for 20-30 minutes; Step 4: drain the liquid, inject clean water into the tank body and start the stirring device (4) and the ultrasonic transducer (10) to clean the tank body.

9. The self-cleaning preparation device of blueberry mint flavor according to claim 8, characterized in that: In the step 3, after stirring at a speed of 100 rpm for 2-3 minutes, the drive motor (57) is started to drive the transmission screw (51) to rotate, thereby driving the rubber scraper (56) to move from top to bottom along the inner wall of the inner tank body (11) to clean the materials adhering to the inner wall of the tank body. After moving to the bottom of the inner tank body (11), the drive motor (57) is started in the reverse direction to drive the rubber scraper (56) to move upward back to its original position.

10. The self-cleaning preparation device of blueberry mint flavor according to claim 9, characterized in that: In the fourth step, when cleaning the tank body, the rubber scraper (56) is driven by the driving motor to move up and down in a reciprocating manner for at least one cycle to clean the raw materials on the inner wall of the tank body.

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