Tunnel type liquid nitrogen instant freezer based on optimal nozzle annular distribution size

Abstract

The tunnel type liquid nitrogen instant freezer based on the optimal nozzle annular distribution size comprises a rectangular bin, a U-shaped plate is fixed to the top face of the rectangular bin, a refrigeration bin is fixed to the top face of the U-shaped plate, and two conveying roll shafts distributed left and right are rotationally connected between the front inner wall and the rear inner wall of the rectangular bin. A conveying belt enabling the two conveying roller shafts to be in transmission connection is arranged between the two conveying roller shafts, an air injection mechanism is arranged on the U-shaped plate, and a cleaning mechanism is arranged in the rectangular bin. When the tunnel type liquid nitrogen instant freezer based on the optimal nozzle annular distribution size is used, a product needing to be quickly frozen is placed on the left side of the conveying belt to be conveyed rightwards, the refrigeration bin uses liquid nitrogen as a refrigerant to produce cold air, and then the cold air is evenly sprayed to the surfaces of the upper side and the lower side of the product through the air spraying mechanism; the quick-freezing efficiency and the quick-freezing effect are improved, the practicability is better, and the quick-freezing device is more convenient to popularize and use.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel-type liquid nitrogen quick-freezing machines, in particular to a tunnel-type liquid nitrogen quick-freezing machine based on an optimal nozzle annular distribution size. Background Art

[0002] Tunnel freezer is a flow-line production equipment, suitable for the production of large quantities of frozen products. Existing liquid nitrogen tunnel freezers generally use liquid nitrogen as a refrigerant for refrigeration and quick freezing. A tunnel is provided in the machine body, and a conveyor belt and a liquid nitrogen nozzle are installed in the tunnel. When the conveyor belt transports the frozen products, the liquid nitrogen gas sprayed from the liquid nitrogen nozzle is used to freeze the frozen products.

[0003] For example, a Chinese patent (publication number: CN213273323U) discloses a tunnel-type liquid nitrogen quick-freezing machine, which includes a machine body with a freezing tunnel and a conveying mechanism arranged in the freezing tunnel of the machine body, the conveying mechanism is provided with a conveying drive motor, the machine body is provided with a freezing nitrogen cavity and a nitrogen supply pipe for an external liquid nitrogen source on the top wall of the freezing tunnel, the nitrogen supply pipe is connected with the freezing nitrogen cavity, the freezing nitrogen cavity is provided with a nitrogen pipe connected with the freezing tunnel, an air blowing fan is provided at the outlet end of the nitrogen pipe, the inlet end of the nitrogen pipe is located in the freezing nitrogen cavity, and a driven gear is provided on the outer wall of the nitrogen pipe, a fan driving motor is provided at the top of the machine body, the output end of the fan driving motor extends into the freezing nitrogen cavity, and the output end of the fan driving motor is provided with a driving gear meshing with the driven gear, so that the vaporized liquid nitrogen can fully contact with the frozen product, and the freezing effect is good.

[0004] However, the above search patent still has some shortcomings. When in use, it can only spray nitrogen on the upper surface of the product that needs to be quick-frozen, and it is not convenient to spray nitrogen evenly on the upper and lower surfaces of the product, which reduces the efficiency and effect of quick freezing and is inconvenient to use. Therefore, a tunnel-type liquid nitrogen quick-freezing machine based on the optimal nozzle annular distribution size is proposed to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a tunnel-type liquid nitrogen quick-freezing machine based on the optimal nozzle annular distribution size, which has the advantages of being easy to use and solves the problem that the device disclosed in the above-mentioned search patent is not convenient for double-sided nitrogen spraying quick freezing of products.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tunnel-type liquid nitrogen quick-freezing machine based on the optimal nozzle annular distribution size, comprising a rectangular bin, a U-shaped plate is fixed on the top surface of the rectangular bin, a refrigeration bin is fixed on the top surface of the U-shaped plate, two conveying rollers distributed left and right are rotatably connected between the front and rear inner walls of the rectangular bin, a conveyor belt is provided between the two conveying rollers to connect the two conveying rollers, an air jet mechanism is provided on the U-shaped plate, and a cleaning mechanism is provided in the rectangular bin;

[0007] The jet mechanism includes an air pump fixed on the top surface of the U-shaped plate and the air inlet end is connected to the refrigeration bin, an L-shaped tube is fixed to the air outlet end of the air pump, a plurality of connecting tubes are fixed to the bottom surface of the L-shaped tube, an annular tube is fixed to the bottom end of the connecting tube, a plurality of jet holes are opened on the inner circumferential wall of the annular tube, and a plurality of supporting wheels are rotatably connected to the outer circumferential wall of the annular tube.

[0008] Furthermore, the cleaning mechanism includes an annular plate fixed between the front and rear inner walls of the rectangular bin, guide grooves are provided on the upper and lower inner walls of the annular plate, guide blocks are slidably connected in the guide grooves, cleaning brushes are fixed on opposite sides of the two guide blocks, a mounting plate is fixed between the upper and lower inner walls of the annular plate, a motor is fixed on the left side of the mounting plate, a circular plate is fixed on the right end of the motor output shaft, and the right side of the circular plate is rotatably connected to two hinged rods whose other ends are respectively hinged to two cleaning brushes.

[0009] Furthermore, the top surface of the rectangular bin is open, the U-shaped plate is fixed to the rectangular bin in an inverted shape, and a plurality of rubber curtains distributed front and back are fixed on the inner top wall near the left and right sides, and the conveyor belt is a metal mesh belt.

[0010] Furthermore, a cleaning door is hinged on the front of the rectangular warehouse, a controller is fixed on the front of the U-shaped plate, the conveying roller is a power roller, and a liquid nitrogen refrigeration device is arranged on the top of the refrigeration warehouse.

[0011] Furthermore, the end of the L-shaped tube away from the air pump is closed, the multiple connecting tubes are evenly distributed on the left and right, and the conveyor belt in the upper part passes through multiple annular tubes in sequence on the left and right.

[0012] Furthermore, the plurality of support wheels are equidistantly distributed front and back, the plurality of air jet holes are equidistantly distributed, and the lower surface of the upper portion of the conveyor belt abuts against the top surface of the support wheel.

[0013] Furthermore, the conveyor belt in the lower part passes through the annular plate from left to right, the guide groove is used for the guide block to slide back and forth inside it, and the two hinged rods are hinged on the same hinge shaft of the circular plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. When using the tunnel-type liquid nitrogen quick-freezing machine based on the optimal nozzle annular distribution size, the product to be quick-frozen is placed on the left side of the conveyor belt so that it is conveyed to the right. The refrigeration chamber uses liquid nitrogen as a refrigerant to produce cold air, and then the cold air is evenly sprayed on the upper and lower sides of the product through the jet mechanism, so that the product is evenly cooled and the efficiency and effect of quick freezing are improved. It is more practical and easier to promote and use.

[0016] 2. This tunnel-type liquid nitrogen quick-freezing machine based on the optimal nozzle annular distribution size will clean the conveyor belt through the provided cleaning mechanism when the conveyor belt is circulating, remove impurities such as product debris adhered to the surface of the conveyor belt due to quick freezing, ensure the cleanliness of the conveyor belt, avoid product contamination, and further improve the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of the utility model;

[0018] Figure 2 It is a front view schematic diagram of the internal structure of the U-shaped plate of the utility model;

[0019] Figure 3 It is a three-dimensional schematic diagram of the annular tube of the utility model;

[0020] Figure 4 It is a side view schematic diagram of the annular plate of the utility model.

[0021] In the figure: 1 rectangular bin, 2 U-shaped plate, 3 refrigeration bin, 4 conveying roller, 5 conveyor belt, 6 jet mechanism, 601 air pump, 602 L-shaped pipe, 603 connecting pipe, 604 annular pipe, 605 jet hole, 606 supporting wheel, 7 cleaning mechanism, 701 annular plate, 702 guide groove, 703 guide block, 704 cleaning brush, 705 mounting plate, 706 motor, 707 circular plate, 708 hinge rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3In the embodiment, a tunnel-type liquid nitrogen quick-freezing machine based on the optimal nozzle annular distribution size comprises a rectangular bin 1, a U-shaped plate 2 is fixed on the top surface of the rectangular bin 1, a refrigeration bin 3 is fixed on the top surface of the U-shaped plate 2, two conveying rollers 4 distributed left and right are rotatably connected between the front and rear inner walls of the rectangular bin 1, a conveyor belt 5 for transmission connection between the two conveying rollers 4 is provided between the two conveying rollers 4, and an injection mechanism 6 is provided on the U-shaped plate 2. When in use, the product to be quick-frozen is placed on the left side of the conveyor belt 5 so that it is conveyed to the right. The refrigeration bin 3 uses liquid nitrogen as a refrigerant to produce cold air, and then the cold air is evenly sprayed on the upper and lower sides of the product through the injection mechanism 6, so that the product is evenly cooled and the efficiency and effect of quick freezing are accelerated, the practicality is better, and it is more convenient to promote and use. A cleaning mechanism 7 is provided in the rectangular bin 1. When the conveyor belt 5 is circulated, the conveyor belt 5 is cleaned by the cleaning mechanism 7, and the impurities such as product debris adhered to the surface of the conveyor belt 5 due to quick freezing are removed, so as to ensure the cleanliness of the conveyor belt 5 and avoid contamination of the product, thereby further improving the practicality of the device.

[0024] See also Figure 1-3 The jet mechanism 6 includes an air pump 601 fixed on the top surface of the U-shaped plate 2 and the air inlet end is connected to the refrigeration bin 3. An L-shaped tube 602 is fixed to the air outlet end of the air pump 601. A plurality of connecting tubes 603 are fixed to the bottom surface of the L-shaped tube 602. An annular tube 604 is fixed to the bottom end of the connecting tube 603. The end of the L-shaped tube 602 away from the air pump 601 is closed. The plurality of connecting tubes 603 are evenly distributed on the left and right. The upper conveyor belt 5 passes through the plurality of annular tubes 604 in sequence on the left and right. When in use, the product is placed on the conveyor belt 5 and conveyed to the right, so that the product passes through the inner side of the ring of the plurality of annular tubes 604 in sequence. At this time, the air pump 601 is started, and the air pump 601 sucks out the cold air inside the refrigeration bin 3 and conveys it to the inside of the L-shaped tube 602. A plurality of jet holes 605 are provided on the inner circumferential wall of the annular tube 604, and the plurality of jet holes 605 are equidistantly distributed. Furthermore, the products enter the annular tube 604 through a plurality of connecting tubes 603, and are ejected from the plurality of jet holes 605 on the inner circumferential wall of the annular tube 604, so that the upper and lower sides and the front and back sides of the products are uniformly cooled at the same time to improve the quick-freezing efficiency. After passing through a plurality of annular tubes 604, the quick-freezing effect can be achieved. A plurality of support wheels 606 are rotatably connected to the outer circumferential wall of the annular tube 604, and the lower surface of the upper conveyor belt 5 is in contact with the top surface of the support wheel 606. The plurality of support wheels 606 are equidistantly distributed front and back. The support wheels 606 provided can play a certain guiding and supporting role for the conveyor belt 5, thereby improving the load-bearing and conveying capacity of the conveyor belt 5.

[0025] The top surface of the rectangular bin 1 is open, the U-shaped plate 2 is fixed to the rectangular bin 1 in an inverted shape, and a plurality of rubber curtains distributed front to back are fixed on the inner top wall near the left and right sides. The rubber curtains can delay the diffusion of cold air, so that the quick-freezing tunnel formed by the U-shaped plate 2 can maintain a low temperature. The conveyor belt 5 is a metal mesh belt. By setting the conveyor belt 5 into a mesh structure, cold air can be blown from the bottom to the lower surface of the product to enhance the quick-freezing efficiency.

[0026] A cleaning door is hinged on the front of the rectangular bin 1, a controller is fixed on the front of the U-shaped plate 2, the conveying roller 4 is a power roller, and a liquid nitrogen refrigeration device is arranged on the top of the refrigeration bin 3. It should be noted that the liquid nitrogen refrigeration device is a mature and public technology in the prior art, so its specific structure and working principle are not described in detail in this article. In addition, the control method of the present application is controlled by a controller, and the control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field, and the present application is mainly used to protect mechanical devices, so the present application does not explain the control method and circuit connection in detail.

[0027] See also Figure 2 and Figure 4 In this embodiment, the cleaning mechanism 7 includes an annular plate 701 fixed between the front and rear inner walls of the rectangular bin 1, and guide grooves 702 are provided on the upper and lower inner walls of the annular plate 701. Guide blocks 703 are slidably connected in the guide grooves 702. Cleaning brushes 704 are fixed on the opposite sides of the two guide blocks 703. The lower half of the conveyor belt 5 penetrates the annular plate 701 from left to right. When the conveyor belt 5 conveys products, the lower half of the conveyor belt 5 moves to the left to penetrate the annular plate 701 and pass between the two cleaning brushes 704. The cleaning brushes 704 brush off the frozen product debris and other debris on the surface of the conveyor belt 5. A mounting plate 705 is fixed between the upper and lower inner walls of the annular plate 701. A motor 706 is fixed to the left side of the mounting plate 705, and a circular plate 707 is fixed to the right end of the output shaft of the motor 706. The right side of the circular plate 707 is rotatably connected to two hinged rods 708, the other ends of which are hinged to two cleaning brushes 704 respectively. The guide groove 702 is used for the guide block 703 to slide back and forth therein. The two hinged rods 708 are hinged on the same hinge axis of the circular plate 707. When cleaning, the motor 706 is started, and the motor 706 drives the circular plate 707 to rotate. The circular plate 707 drives the two cleaning brushes 704 to move back and forth in coordination with the guide groove 702 and the guide block 703 through the two hinged rods 708, thereby further improving the cleaning effect of the conveyor belt 5.

[0028] The working principle of the above embodiment is:

[0029] (1) When in use, the product is placed on the conveyor belt 5 and conveyed to the right, so that the product passes through the inner side of the ring of multiple annular tubes 604 in turn. At this time, the air pump 601 is started, and the air pump 601 sucks out the cold air inside the refrigeration warehouse 3 and conveys it to the inside of the L-shaped tube 602. Further, the cold air enters the annular tube 604 through multiple connecting tubes 603 and is sprayed out from multiple jet holes 605 on the inner wall of the annular tube 604, so that the upper and lower sides and the front and back sides of the product are evenly cooled at the same time to improve the quick-freezing efficiency. After passing through multiple annular tubes 604, the quick-freezing effect can be achieved.

[0030] (2) When the conveyor belt 5 is conveying products, the lower part of the conveyor belt 5 moves to the left, passes through the annular plate 701 and passes between the two cleaning brushes 704. The cleaning brushes 704 brush off the frozen product debris and other debris on the surface of the conveyor belt 5. When cleaning, the motor 706 is started, and the motor 706 drives the circular plate 707 to rotate. The circular plate 707 drives the two cleaning brushes 704 to move forward and backward through the two hinged rods 708 to cooperate with the guide groove 702 and the guide block 703, thereby further improving the cleaning effect of the conveyor belt 5.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel-type liquid nitrogen quick-freezing machine based on an optimal nozzle annular distribution size, comprising a rectangular bin (1), characterized in that: A U-shaped plate (2) is fixed on the top surface of the rectangular bin (1), a refrigeration bin (3) is fixed on the top surface of the U-shaped plate (2), two conveying rollers (4) distributed on the left and right are rotatably connected between the front and rear inner walls of the rectangular bin (1), a conveying belt (5) is provided between the two conveying rollers (4) for transmission connection between the two, an air jet mechanism (6) is provided on the U-shaped plate (2), and a cleaning mechanism (7) is provided inside the rectangular bin (1); The jet mechanism (6) comprises an air pump (601) fixed on the top surface of the U-shaped plate (2) and the air inlet end of which is connected to the refrigeration chamber (3); an L-shaped tube (602) is fixed to the air outlet end of the air pump (601); a plurality of connecting tubes (603) are fixed to the bottom surface of the L-shaped tube (602); a ring tube (604) is fixed to the bottom end of the connecting tube (603); a plurality of jet holes (605) are opened on the inner peripheral wall of the ring tube (604); and a plurality of supporting wheels (606) are rotatably connected to the outer peripheral wall of the ring tube (604).

2. The tunnel type liquid nitrogen quick freezing machine based on the optimal nozzle annular distribution size according to claim 1, characterized in that: The cleaning mechanism (7) comprises an annular plate (701) fixed between the front and rear inner walls of the rectangular bin (1); guide grooves (702) are provided on the upper and lower inner walls of the annular plate (701); guide blocks (703) are slidably connected in the guide grooves (702); cleaning brushes (704) are fixed on opposite sides of the two guide blocks (703); a mounting plate (705) is fixed between the upper and lower inner walls of the annular plate (701); a motor (706) is fixed on the left side of the mounting plate (705); a circular plate (707) is fixed on the right end of the output shaft of the motor (706); and the right side of the circular plate (707) is rotatably connected to two hinged rods (708) whose other ends are respectively hinged to two cleaning brushes (704).

3. The tunnel type liquid nitrogen quick freezing machine based on the optimal nozzle annular distribution size according to claim 1, characterized in that: The top surface of the rectangular bin (1) is open, the U-shaped plate (2) is fixed to the rectangular bin (1) in an inverted manner, and a plurality of rubber curtains distributed front and back are fixed on the inner top wall near the left and right sides, and the conveyor belt (5) is a metal wire mesh belt.

4. The tunnel type liquid nitrogen quick freezing machine based on the optimal nozzle annular distribution size according to claim 1, characterized in that: A cleaning door is hinged on the front of the rectangular bin (1), a controller is fixed on the front of the U-shaped plate (2), the conveying roller (4) is a power roller, and a liquid nitrogen refrigeration device is arranged on the top of the refrigeration bin (3).

5. The tunnel type liquid nitrogen quick freezing machine based on the optimal nozzle annular distribution size according to claim 1, characterized in that: The end of the L-shaped tube (602) facing away from the air pump (601) is closed, and the multiple connecting tubes (603) are evenly distributed on the left and right sides. The conveyor belt (5) in the upper part passes through multiple annular tubes (604) in sequence on the left and right sides.

6. The tunnel type liquid nitrogen quick freezing machine based on the optimal nozzle annular distribution size according to claim 1, characterized in that: The plurality of support wheels (606) are distributed equidistantly in the front and rear, the plurality of air injection holes (605) are distributed equidistantly, and the lower surface of the upper portion of the conveyor belt (5) abuts against the top surface of the support wheel (606).

7. The tunnel type liquid nitrogen quick freezing machine based on the optimal nozzle annular distribution size according to claim 2, characterized in that: The conveyor belt (5) in the lower part passes through the annular plate (701) from left to right, and the guide groove (702) is used for the guide block (703) to slide back and forth inside it, and the two hinge rods (708) are hinged on the same hinge shaft of the circular plate (707).

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