Liquid nitrogen vaporizer capable of automatically defrosting

Abstract

The utility model discloses a liquid nitrogen vaporizer capable of defrosting automatically, which comprises a vaporizing pipe and an adjusting device, the outer wall of the vaporizing pipe is fixedly connected with a finned tube, and the inner wall of the adjusting device is fixedly connected with the outer wall of the vaporizing pipe; the utility model relates to the technical field of liquid nitrogen vaporizers, according to the adjusting device, through cooperation of an air compressor and a motor, when a frost layer appears, the air compressor is started firstly, compressed air is sprayed out through a spray head to conduct preliminary purging and loosening on the frost layer, then the motor drives a threaded rod to rotate, and a scraper is driven to move up and down along the threaded rod; compared with a traditional manual defrosting mode or a single defrosting mode, the defrosting device has the advantages that the defrosting efficiency is greatly improved, and the defrosting time is remarkably shortened through the dual-action mechanism that the scraping blade is attached to the finned tube to scrape the frost layer and the spray head continuously purges along with the movement of the scraping blade.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen vaporizer technology, specifically to a liquid nitrogen vaporizer with automatic defrosting capability. Background Technology

[0002] In many fields such as modern industrial production and scientific research experiments, liquid nitrogen vaporizers play an indispensable role as key equipment for converting liquid nitrogen from a liquid state to a gaseous state. They exchange heat with the outside world through vaporization tubes, absorbing heat to vaporize liquid nitrogen into nitrogen gas. They are widely used in food freezing, medical cryotherapy, industrial cooling and other scenarios.

[0003] However, during the vaporization process of liquid nitrogen, due to the extremely low temperature of liquid nitrogen, there is a huge temperature difference between the finned tubes on the outer wall of the vaporization tube and the external environment. This easily causes water vapor in the air to condense into frost on the surface of the finned tubes. The formation of frost layer will greatly hinder the heat exchange efficiency. On the one hand, the frost layer itself is a poor conductor of heat and will form a heat insulation layer, making it difficult for external heat to be effectively transferred to the liquid nitrogen in the vaporization tube, resulting in a slower vaporization rate of liquid nitrogen, which cannot meet the requirements of nitrogen output and output speed in actual use. On the other hand, as the frost layer continues to accumulate and thicken, it will increase the weight of the finned tube and the uneven stress, affecting the structural stability of the vaporizer and may even lead to equipment failure. Traditional liquid nitrogen vaporizers mostly rely on manual or single tools to clean the frost layer periodically, which not only consumes a lot of manpower and time costs, but also has problems such as untimely cleaning and poor cleaning effect, making it difficult to ensure the continuous and stable operation of the liquid nitrogen vaporizer. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an automatic defrosting liquid nitrogen vaporizer, which solves the problem that manual cleaning is not timely and the cleaning effect is poor when frost forms on the surface of traditional liquid nitrogen vaporizers.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatically defrosting liquid nitrogen vaporizer includes: a vaporization tube with finned tubes fixedly connected to its outer wall; and an adjustment device with its inner wall fixedly connected to the outer wall of the vaporization tube. The adjustment device includes a base, a motor fixedly connected to the inner wall of the base bottom, an air compressor fixedly connected to the inner wall of the base bottom, an air inlet hose fixedly connected to the outer wall of the air compressor, a connecting pipe fixedly connected to the outer wall of the air inlet hose on the side away from the air compressor, a nozzle fixedly connected to the inner wall of the connecting pipe, and a threaded rod rotatably connected to the inner wall of the top of the motor.

[0009] Preferably, the nozzles are arranged in an array along the outer wall of the connecting pipe, and the outer wall of the threaded rod is rotatably connected to the inner wall of the top of the base. When the air compressor starts working, it compresses the air and delivers it to the connecting pipe through the air intake hose. The compressed air is sprayed out from the nozzles to initially blow away the frost layer on the surface of the finned tube and loosen the frost layer.

[0010] Preferably, a scraper is threadedly connected to the outer wall of the threaded rod, a fin groove is formed on the outer wall of the scraper, a scraper blade is fixedly connected to the outer wall at the bottom of the scraper, and a spring clip is fixedly connected to the outer wall on the side of the scraper.

[0011] Preferably, the fin grooves are arranged in an array along the outer wall of the scraper, and the spring clips are disposed outside the fin grooves. The inner wall of the spring clips is engaged with the outer wall of the connecting pipe, so that the nozzle moves with the scraper and works with the scraper to first blow and then scrape the finned tube, thereby enhancing the defrosting effect on the finned tube.

[0012] Preferably, an inlet pipe is fixedly connected to the outer wall of the vaporization tube, an outlet pipe is fixedly connected to the outer wall of the vaporization tube on the side away from the inlet pipe, and a support plate is fixedly connected to the outer wall of the top of the vaporization tube.

[0013] Preferably, the outer wall of the bottom of the vaporization tube is fixedly connected to the inner wall of the top of the base, the outer wall of the finned tube is slidably connected to the inner wall of the finned groove, and the connecting pipe is set outside the finned tube. When the motor is started, it drives the threaded rod connected to the top to rotate along the inner wall of the top of the base. The scraper connected to the outer wall of the threaded rod moves up and down along the threaded rod as the threaded rod rotates. The scraper has finned grooves arranged in an array along its outer wall. The outer wall of the finned tube is slidably connected to the inner wall of the finned groove, so that the scraper can fit against the finned tube during movement. The scraper fixedly connected to the bottom of the scraper scrapes off the frost layer on the surface of the finned tube as the scraper moves.

[0014] (III) Beneficial Effects

[0015] This invention provides a liquid nitrogen vaporizer with automatic defrosting capability. It has the following beneficial effects:

[0016] (i) The regulating device, through the cooperation of an air compressor and a motor, when frost appears, the air compressor starts first, using the nozzle to spray compressed air to initially blow and loosen the frost. Then the motor drives the threaded rod to rotate, causing the scraper to move up and down along the threaded rod. The scraper blades adhere to the finned tube to scrape off the frost. At the same time, the nozzle moves with the scraper to continuously blow. This dual action mechanism of blowing first and then scraping greatly improves the defrosting efficiency and significantly shortens the defrosting time compared with traditional manual defrosting or single defrosting methods.

[0017] (ii) The vaporization tube is structurally stable through the support plate. The spring clip of the scraper in the adjustment device is engaged with the connecting pipe to ensure the stability of the scraper during movement, reduce unstable factors during equipment operation, extend the service life of the liquid nitrogen vaporizer, and reduce maintenance costs and equipment downtime for maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the vaporization tube of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the adjusting device of this utility model;

[0021] Figure 4 This is a schematic diagram of the scraper of this utility model.

[0022] In the diagram: 1. Vaporization pipe; 11. Liquid inlet pipe; 12. Gas outlet pipe; 13. Support plate; 2. Finned tube; 3. Adjustment device; 31. Base; 32. Motor; 33. Air compressor; 34. Air inlet hose; 35. Connecting pipe; 36. Nozzle; 37. Threaded rod; 38. Scraper; 39. Finned groove; 391. Scraper blade; 392. Spring clip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: an automatic defrosting liquid nitrogen vaporizer, comprising: a vaporization tube 1, with a finned tube 2 fixedly connected to the outer wall of the vaporization tube 1, and further comprising: an adjustment device 3, with the inner wall of the adjustment device 3 fixedly connected to the outer wall of the vaporization tube 1; the adjustment device 3 includes a base 31, with a motor 32 fixedly connected to the inner wall of the bottom of the base 31, an air compressor 33 fixedly connected to the inner wall of the bottom of the base 31, an air inlet hose 34 fixedly connected to the outer wall of the air compressor 33, a connecting pipe 35 fixedly connected to the outer wall of the air inlet hose 34 on the side away from the air compressor 33, a nozzle 36 fixedly connected to the inner wall of the connecting pipe 35, and a threaded rod 37 rotatably connected to the inner wall of the top of the motor 32.

[0025] The nozzles 36 are arranged in an array along the outer wall of the connecting pipe 35. The outer wall of the threaded rod 37 is rotatably connected to the inner wall of the top of the base 31. The air compressor 33 starts to work, compresses the air through the air intake hose 34 and delivers it to the connecting pipe 35. The compressed air is sprayed out from the nozzles 36 to initially blow away the frost layer on the surface of the finned tube 2 and loosen the frost layer.

[0026] The outer wall of the threaded rod 37 is threadedly connected to a scraper 38. The outer wall of the scraper 38 is provided with a fin groove 39. The outer wall of the bottom of the scraper 38 is fixedly connected to a scraper blade 391. The outer wall of the side of the scraper 38 is fixedly connected to a spring clip 392.

[0027] The fin grooves 39 are arranged in an array along the outer wall of the scraper 38. The spring clips 392 are set on the outside of the fin grooves 39. The inner wall of the spring clips 392 is engaged with the outer wall of the connecting pipe 35, so that the nozzle 36 moves with the scraper 38. Together with the scraper blade 391, the nozzle first blows and then scrapes the finned tube 2, which enhances the defrosting effect on the finned tube 2.

[0028] An inlet pipe 11 is fixedly connected to the outer wall of the vaporization pipe 1, an outlet pipe 12 is fixedly connected to the outer wall of the vaporization pipe 1 on the side away from the inlet pipe 11, and a support plate 13 is fixedly connected to the outer wall of the top of the vaporization pipe 1.

[0029] The outer wall of the bottom of the vaporization tube 1 is fixedly connected to the inner wall of the top of the base 31. The outer wall of the finned tube 2 is slidably connected to the inner wall of the finned groove 39. The connecting pipe 35 is set outside the finned tube 2. When the motor 32 is started, it drives the threaded rod 37, which is rotatably connected at the top, to rotate along the inner wall of the top of the base 31. The scraper 38, which is threadedly connected to the outer wall of the threaded rod 37, moves up and down along the threaded rod 37 under the rotation of the threaded rod 37. The scraper 38 has finned grooves 39 arranged in an array along its outer wall. The outer wall of the finned tube 2 is slidably connected to the inner wall of the finned groove 39, so that the scraper 38 can fit against the finned tube 2 during the movement. The scraper 391, which is fixedly connected to the bottom of the scraper 38, scrapes off the frost layer on the surface of the finned tube 2 as the scraper 38 moves.

[0030] In use, liquid nitrogen enters vaporization tube 1 through inlet pipe 11. Inside vaporization tube 1, liquid nitrogen absorbs external heat and vaporizes, turning into gaseous nitrogen and then being discharged from outlet pipe 12. The finned tube 2 on the outer wall of vaporization tube 1 increases the contact area with the outside, thereby improving heat exchange efficiency and accelerating the vaporization speed of liquid nitrogen. Support plate 13 ensures the structural stability of vaporization tube 1.

[0031] When frost appears on the surface of the finned tube 2, the regulating device 3 is activated. First, the air compressor 33 on the base 31 starts to work, and compresses the air through the air inlet hose 34 and delivers it to the connecting pipe 35. The nozzles 36 on the inner wall of the connecting pipe 35 are arranged in an array along its outer wall. Compressed air is sprayed out from the nozzles 36 to initially blow away the frost on the surface of the finned tube 2 and loosen the frost.

[0032] Next, the motor 32 on the base 31 starts, driving the threaded rod 37, which is rotatably connected at the top, to rotate along the inner wall of the top of the base 31. The scraper 38, which is threaded to the outer wall of the threaded rod 37, moves up and down along the threaded rod 37 as the threaded rod 37 rotates. The scraper 38 has fin grooves 39 arranged in an array along its outer wall. The outer wall of the finned tube 2 is slidably connected to the inner wall of the fin groove 39, so that the scraper 38 can fit against the finned tube 2 during movement. The scraper 391, which is fixedly connected to the bottom of the scraper 38, moves along with the scraper. The movement of scraper 38 scrapes off the frost on the surface of finned tube 2. At the same time, the spring clip 392 fixedly connected to the side of scraper 38 is set outside the fin groove 39, and the inner wall of spring clip 392 is engaged with the outer wall of connecting pipe 35, so that nozzle 36 moves with scraper 38 and works with scraper 391 to first blow and then scrape off the finned tube 2, which enhances the defrosting effect of finned tube 2, ensures that the frost on the surface of finned tube 2 is effectively removed, maintains good heat exchange performance, and ensures the normal and efficient operation of liquid nitrogen vaporizer.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid nitrogen vaporizer with automatic defrosting capability, comprising: A vaporization tube (1), the outer wall of which is fixedly connected to a finned tube (2), characterized in that it further includes an adjustment device (3), the inner wall of which is fixedly connected to the outer wall of the vaporization tube (1); The regulating device (3) includes a base (31), a motor (32) is fixedly connected to the inner wall of the bottom of the base (31), an air compressor (33) is fixedly connected to the inner wall of the bottom of the base (31), an air intake hose (34) is fixedly connected to the outer wall of the air compressor (33), a connecting pipe (35) is fixedly connected to the outer wall of the air intake hose (34) away from the air compressor (33), a nozzle (36) is fixedly connected to the inner wall of the connecting pipe (35), and a threaded rod (37) is rotatably connected to the inner wall of the top of the motor (32).

2. The liquid nitrogen vaporizer with automatic defrosting capability according to claim 1, characterized in that: The nozzles (36) are arranged in an array along the outer wall of the connecting pipe (35), and the outer wall of the threaded rod (37) is rotatably connected to the inner wall of the top of the base (31).

3. The liquid nitrogen vaporizer with automatic defrosting capability according to claim 1, characterized in that: The outer wall of the threaded rod (37) is threaded with a scraper (38), the outer wall of the scraper (38) is provided with a fin groove (39), the outer wall of the bottom of the scraper (38) is fixedly connected with a scraper blade (391), and the outer wall of the side of the scraper (38) is fixedly connected with a spring clip (392).

4. The liquid nitrogen vaporizer with automatic defrosting capability according to claim 3, characterized in that: The fin grooves (39) are arranged in an array along the outer wall of the scraper (38), and the spring clips (392) are disposed outside the fin grooves (39). The inner wall of the spring clips (392) is engaged with the outer wall of the connecting pipe (35).

5. The liquid nitrogen vaporizer with automatic defrosting capability according to claim 1, characterized in that: The outer wall of the vaporization tube (1) is fixedly connected to the liquid inlet pipe (11), the outer wall of the vaporization tube (1) on the side away from the liquid inlet pipe (11) is fixedly connected to the gas outlet pipe (12), and the outer wall of the top of the vaporization tube (1) is fixedly connected to the support plate (13).

6. The liquid nitrogen vaporizer with automatic defrosting capability according to claim 1, characterized in that: The outer wall of the bottom of the vaporization tube (1) is fixedly connected to the inner wall of the top of the base (31), the outer wall of the finned tube (2) is slidably connected to the inner wall of the finned groove (39), and the connecting tube (35) is disposed outside the finned tube (2).

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