CN218120296U

CN218120296U - Liquid nitrogen quick-freezing device

Info

Publication number: CN218120296U
Application number: CN202222096204.2U
Authority: CN
Inventors: 焦楚壹; 陈季旺; 方强; 廖锦晗; 何相龙; 徐丽敏
Original assignee: Hubei Heyuan Gases Co ltd; Wuhan Polytechnic University
Current assignee: Hubei Heyuan Gases Co ltd; Wuhan Polytechnic University
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-12-23
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a liquid nitrogen quick-freezing plant, including preprocessing unit, quick-freeze unit and transmission unit, wherein: the transmission unit penetrates through the pretreatment unit and the quick-freezing unit, the quick-freezing unit comprises a pre-cooling unit and a freezing unit which are communicated through a nitrogen gas path, the pre-cooling unit is arranged between the pretreatment unit and the freezing unit, and the freezing unit is communicated with a liquid nitrogen storage tank; the quick-freezing device realizes that low-temperature nitrogen discharged from the freezing unit is recycled into the pre-cooling unit through the pre-cooling unit and the freezing unit which are arranged in series through the gas circuit, and can be pre-cooled before freezing; the continuous quick freezing is realized by arranging a transmission mechanism to penetrate through all the units; the device can realize quick-freezing processing with low energy consumption and high efficiency.

Description

Liquid nitrogen quick-freezing device

Technical Field

The utility model relates to a quick-freeze unit technical field specifically is a liquid nitrogen quick-freeze unit.

Background

The existing liquid nitrogen quick-freezing technology adopts the traditional quick-freezing cabinet for freezing, a large amount of low-temperature nitrogen is directly discharged into the atmosphere when the quick-freezing cabinet runs, a large amount of cold energy is wasted, the liquid nitrogen quick-freezing cost is high, and the step of industry development is restricted. On the other hand, the existing quick freezing is basically in an intermittent mode, when the processing amount is large, the quick freezing needs to be carried out in batches for many times, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liquid nitrogen quick-freezing device utilizes the liquid nitrogen to carry out the multistage cooling, but realizes energy saving and consumption reduction and continuous type processing.

In order to achieve the above purpose, the scheme of the utility model is as follows:

the utility model provides a liquid nitrogen quick-freeze apparatus, includes pretreatment unit, quick-freeze unit and transmission unit, wherein: the transmission unit runs through the pretreatment unit and the quick-freezing unit, the quick-freezing unit comprises a pre-cooling unit and a freezing unit which are communicated through a nitrogen gas path, the pre-cooling unit is arranged between the pretreatment unit and the freezing unit, and the freezing unit is communicated with a liquid nitrogen storage tank.

Furthermore, the pre-cooling unit and the freezing unit are both of box-type structures, and a corresponding transmission mechanism is arranged in each unit.

Preferably, the pre-cooling unit and the freezing unit are both provided with brushes attached to the conveying unit.

Further, the pretreatment unit comprises a cleaning unit and a drying unit which are arranged in sequence.

Preferably, the upper part of the cleaning unit is provided with a spraying mechanism, and the lower part of the cleaning unit is provided with a cleaning mechanism attached to the transmission unit.

Further, the vacuum packaging unit is arranged behind the quick freezing unit.

Compared with the prior art, the utility model discloses possess following beneficial effect:

the quick-freezing device provided by the utility model realizes that the low-temperature nitrogen discharged from the freezing unit is recycled into the pre-cooling unit through the pre-cooling unit and the freezing unit which are arranged in series by the gas circuit, and can carry out pre-cooling before freezing; the transmission mechanism is arranged to penetrate through all the units to realize continuous quick freezing; the brushes arranged on the precooling unit and the freezing unit are attached to the transmission mechanism to prevent the nitrogen from escaping. The whole device can realize quick-freezing processing with low energy consumption and high efficiency.

Drawings

Fig. 1 is an overall schematic view of the quick-freezing device of the utility model.

Wherein: 1. a cleaning unit; 2. a drying unit; 3. a pre-cooling unit; 4. a freezing unit; 5. a vacuum packaging unit; 10. a transport mechanism; 20. a brush; 101. a cleaning mechanism; 102. a spraying mechanism; 301. and a nitrogen communicating pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and are not to be construed as limiting the invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be connected through any combination of two or more members or structures. The above terms may have the specific meanings given in the present invention to those skilled in the art according to the specific circumstances.

As shown in fig. 1, the utility model provides a liquid nitrogen quick-freezing device, which comprises a cleaning unit 1, a drying unit 2, a precooling unit 3, a freezing unit 4 and a vacuum packaging unit 5, which are arranged from right to left; wherein: each unit is provided with an independent transmission mechanism 10 which is adjacent to each other and is arranged at the same height and used for the step-by-step transmission of materials. The lower part of the cleaning unit 1 is provided with a cleaning mechanism 101 attached to the conveying mechanism 10, the top part of the cleaning unit is provided with a spraying mechanism 102, and the cleaning mechanism 101 is connected with a motor to rotate so as to generate friction (such as a roller type brush) on the surface of the material; the spraying mechanism 102 is communicated with a water pipe to realize that the water spraying is matched with the cleaning mechanism 101 to complete cleaning. The drying unit 2 is a common hot air drying device and is used for drying the materials. The cleaning unit 1 and the drying unit 2 are integrally used as a pretreatment unit to realize material surface pretreatment. The pre-cooling unit 3 and the freezing unit 4 are both box-type structures, a transmission gap is reserved in the middle, the freezing unit 4 is communicated with a liquid nitrogen storage tank (not shown), the tops of the two units are communicated through a nitrogen communicating pipe 301, and nitrogen circulation generated by heat absorption of liquid nitrogen in the freezing unit 4 is realized; the precooling unit 3 and the freezing unit 4 are respectively provided with a brush 20 attached to the transmission mechanism 10 for sealing the notch of the box body to reduce the escape of nitrogen or realize heat preservation. The vacuum packaging unit 5 is a common vacuum packaging mechanism, and is used for performing sealed packaging treatment on the materials under vacuum pumping.

In the preferred embodiment, the transport means 10 are optionally conventional conveyors, and the individual settings between the units are such that individual adjustment of the speed is achieved, in particular sufficient residence time in the pre-cooling unit 3 and the freezing unit 4 is to be ensured to adjust for different material properties to achieve rapid freezing. In addition, a transmission mechanism 10 is additionally arranged in front of the cleaning unit 1, so that feeding operation is facilitated.

During operation, open liquid nitrogen storage tank valve in advance, open all units and carry out work, place the material (can be food or other plant tissues, food like bamboo shoots) in external transmission device 10, get into cleaning unit 1 during the conveying and handle material surface cleaning, then get into drying unit 2 and get rid of surface moisture, carry out preliminary cooling through precooling unit 3 and freeze the back and get into in freezing unit 4 and realize liquid nitrogen freezing, after the material falls to required temperature (bamboo shoots pod enzymatic activity is showing and is reducing), get into the freezer storage after vacuum packaging handles, the screening. The whole quick-freezing operation process is continuous, the liquid nitrogen consumption can be reduced, and the quick-freezing processing with low energy consumption and high efficiency is realized.

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 alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a liquid nitrogen quick-freeze device, includes preprocessing unit, quick-freeze unit and transmission unit, its characterized in that, transmission unit run through preprocessing unit and quick-freeze unit, and quick-freeze unit includes precooling unit (3) and freezing unit (4) of nitrogen gas circuit intercommunication, and precooling unit (3) are located between preprocessing unit and freezing unit (4), and freezing unit (4) intercommunication liquid nitrogen storage tank.

2. The liquid nitrogen quick-freezing device according to claim 1, wherein the pre-cooling unit (3) and the freezing unit (4) are both box-type structures, and a corresponding transmission mechanism (10) is arranged in each unit.

3. The liquid nitrogen quick-freezing device according to claim 2, wherein the pre-cooling unit (3) and the freezing unit (4) are provided with brushes (20) attached to the conveying unit.

4. The liquid nitrogen quick-freezing device according to claim 1, wherein the pretreatment unit comprises a cleaning unit (1) and a drying unit (2) which are arranged in sequence.

5. The liquid nitrogen quick-freezing device according to claim 4, wherein a spraying mechanism (102) is arranged at the upper part of the cleaning unit (1), and a cleaning mechanism (101) attached to the transmission unit is arranged at the lower part of the cleaning unit.

6. The liquid nitrogen flash freezing apparatus according to claim 1, further comprising a vacuum packing unit (5) disposed after the flash freezing unit.