CN112556264B - Overlapping liquid nitrogen refrigerating device - Google Patents
Overlapping liquid nitrogen refrigerating device Download PDFInfo
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- CN112556264B CN112556264B CN202011384552.9A CN202011384552A CN112556264B CN 112556264 B CN112556264 B CN 112556264B CN 202011384552 A CN202011384552 A CN 202011384552A CN 112556264 B CN112556264 B CN 112556264B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
- F25D3/102—Stationary cabinets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
- F25D23/065—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2303/00—Details of devices using other cold materials; Details of devices using cold-storage bodies
- F25D2303/08—Devices using cold storage material, i.e. ice or other freezable liquid
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- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention provides a cascade liquid nitrogen refrigerating device, which comprises a box body, wherein a plurality of temperature zone cabins provided with temperature controllers are arranged in the box body, the temperature controllers in each temperature zone cabin are set to be different in temperature, a system pipeline is arranged in the temperature zone cabins in a surrounding mode, one end of the system pipeline extends out of the box body and is used for inputting liquid nitrogen, the other end of the system pipeline extends out of the box body and is used for outputting liquid nitrogen, a plurality of electromagnetic valves used for adjusting the flow of the liquid nitrogen are arranged on the system pipeline, and the electromagnetic valves are electrically connected with the temperature controllers.
Description
Technical Field
The invention belongs to the technical field of liquid nitrogen refrigeration, and particularly relates to a cascade type liquid nitrogen refrigeration device.
Background
The existing refrigerating device usually uses a refrigerating container, and the purpose of cooling is realized by spraying liquid nitrogen into the refrigerating container or arranging a pipeline in the container and introducing the liquid nitrogen into the pipeline.
However, direct injection of liquid nitrogen has great insecurity, and the liquid nitrogen is communicated into the pipeline, so that great waste is easily caused to the liquid nitrogen, and the great consumption of the liquid nitrogen causes the increase of cost.
Disclosure of Invention
The invention provides a cascade type liquid nitrogen refrigerating device which can solve the problem of unsafety of liquid nitrogen injection and the problem of waste of liquid nitrogen.
The technical scheme of the invention is realized as follows: the utility model provides a cascade's liquid nitrogen refrigerating plant, includes a box, is provided with a plurality of warm area cabins that are provided with the temperature controller in the box, and the temperature controller in every warm area cabin sets for different temperatures, and the warm area cabin is interior to surround and is provided with the system pipeline, and the one end of system pipeline stretches out the box and is used for the input liquid nitrogen, and the other end of system pipeline stretches out the box and is used for exporting the liquid nitrogen, is provided with a plurality of solenoid valves that are used for adjusting the liquid nitrogen flow on the system pipeline, and the electricity is connected between solenoid valve and the temperature controller.
As a preferred embodiment, a plurality of casters are fixedly arranged at the bottom of the box body.
As a preferred embodiment, the temperature zone cabin is fixedly connected with the inner wall of the box body through a foaming layer, an inner container is placed in the temperature zone cabin, the inner container comprises a container body and a door body, the container body is arranged in a rectangular shape, articles are placed in the container body, the system pipeline is arranged on the outer side of the container body in a surrounding mode, the door body is hinged with the container body, and the temperature controller is fixedly arranged on the door body.
The arrangement mode of the system pipeline is that the arrangement from the top of the inner container to the bottom of the inner container is from tight to loose.
In a preferred embodiment, the gallbladder body comprises a first gallbladder body, a second gallbladder body, a third gallbladder body and a fourth gallbladder body;
the door body comprises a first door body, a second door body, a third door body and a fourth door body;
the temperature controllers comprise a first temperature controller, a second temperature controller, a third temperature controller and a fourth temperature controller;
the first door body is hinged with the first liner body, the first temperature controller is fixedly arranged on the first door body, the set temperature of the first temperature controller is-150 to-190 ℃, the second door body is hinged with the second liner body, the second temperature controller is fixedly arranged on the second door body, the set temperature of the second temperature controller is-80 to-120 ℃, the third door body is hinged with the third liner body, the third temperature controller is fixedly arranged on the third door body, the set temperature of the third temperature controller is-20 to-60 ℃, the fourth door body is hinged with the fourth liner body, the fourth temperature controller is fixedly arranged on the fourth door body, and the set temperature of the fourth temperature controller is 2 to 8 ℃.
As a preferred embodiment, the system piping includes a first refrigeration piping, a second refrigeration piping, a third refrigeration piping, and a fourth refrigeration piping;
the first refrigeration pipeline surrounds the outer side of the first liner body, the starting end of the first refrigeration pipeline is arranged on the left side of the top of the first liner body, the first refrigeration pipeline is arranged on the top of the first liner body, the side wall of the first liner body and the bottom of the first liner body in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the first refrigeration pipeline is arranged on the left side of the bottom of the first liner body;
the second refrigeration pipeline surrounds the outer side of the second liner body, the starting end of the second refrigeration pipeline is arranged on the left side of the top of the second liner body, the second refrigeration pipeline is arranged on the top of the second liner body, the side wall of the second liner body and the bottom of the second liner body in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the second refrigeration pipeline is arranged on the left side of the bottom of the second liner body;
the third refrigeration pipeline surrounds the outer side of the third liner body, the starting end of the third refrigeration pipeline is arranged on the left side of the top of the third liner body, the third refrigeration pipeline is arranged on the top of the third liner body, the side wall of the third liner body and the bottom of the third liner body in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the third refrigeration pipeline is arranged on the left side of the bottom of the third liner body;
the fourth refrigeration pipeline encircles in the outside of the fourth courage body, and the top left side of the fourth courage body is arranged in to the initiating terminal of fourth refrigeration pipeline, and the fourth refrigeration pipeline is the U type to come and go and encircle in proper order and set up in the top of the fourth courage body, the lateral wall of the fourth courage body to the end of the bottom of the fourth courage body, and the left side of fourth courage body bottom is arranged in to the end of fourth refrigeration pipeline.
In a preferred embodiment, a circulation pipeline is arranged in the box body in a penetrating way up and down, and liquid nitrogen is input from the top end of the circulation pipeline and output from the bottom end of the circulation pipeline;
a first connecting pipeline is communicated and arranged between the starting end of the first refrigerating pipeline and the circulating pipeline, a first electromagnetic valve is arranged on the first connecting pipeline, a second connecting pipeline is communicated and arranged between the ending end of the first refrigerating pipeline and the starting end of the second refrigerating pipeline, a second electromagnetic valve is arranged on the second connecting pipeline, a third connecting pipeline is communicated and arranged between the ending end of the first refrigerating pipeline and the circulating pipeline, a third electromagnetic valve is arranged on the third connecting pipeline, the first electromagnetic valve and the third electromagnetic valve are electrically connected with the first temperature controller, and the second electromagnetic valve is electrically connected with the second temperature controller;
a fourth connecting pipeline is communicated and arranged between the starting end of the second refrigerating pipeline and the circulating pipeline, a fourth electromagnetic valve is arranged on the fourth connecting pipeline, a fifth connecting pipeline is communicated and arranged between the ending end of the second refrigerating pipeline and the circulating pipeline, a fifth electromagnetic valve is arranged on the fifth connecting pipeline, a sixth connecting pipeline is communicated and arranged between the ending end of the second refrigerating pipeline and the starting end of the third refrigerating pipeline, a sixth electromagnetic valve is arranged on the sixth connecting pipeline, the fourth electromagnetic valve and the fifth electromagnetic valve are electrically connected with the second temperature controller, and the sixth electromagnetic valve is electrically connected with the third temperature controller;
a seventh connecting pipeline is communicated and arranged between the starting end of the third refrigerating pipeline and the circulating pipeline, a seventh electromagnetic valve is arranged on the seventh connecting pipeline, an eighth connecting pipeline is communicated and arranged between the finishing end of the third refrigerating pipeline and the starting end of the fourth refrigerating pipeline, an eighth electromagnetic valve is arranged on the eighth connecting pipeline, a ninth connecting pipeline is communicated and arranged between the finishing end of the third refrigerating pipeline and the circulating pipeline, a ninth electromagnetic valve is arranged on the ninth connecting pipeline, wherein the seventh electromagnetic valve and the ninth electromagnetic valve are electrically connected with the third temperature controller, and the eighth electromagnetic valve is electrically connected with the fourth temperature controller;
a tenth connecting pipeline is communicated and arranged between the starting end of the fourth refrigerating pipeline and the circulating pipeline, a tenth electromagnetic valve is arranged on the tenth connecting pipeline, an eleventh connecting pipeline is communicated and arranged between the finishing end of the fourth refrigerating pipeline and the circulating pipeline, and the tenth electromagnetic valve and the eleventh electromagnetic valve are electrically connected with the fourth temperature controller.
As a preferred embodiment, a plurality of fixing grooves are formed in the temperature zone cabin body, the fixing grooves and the liner are correspondingly arranged one to one, a motor is placed in each fixing groove, a blade is connected to one side of the motor, a fan protective cover is arranged on one side of each blade, the fan protective cover is fixedly connected with the liner, and a plurality of through holes are formed in the fan protective cover.
The invention injects liquid nitrogen from the top end of the circulation pipeline, the first temperature controller in the first liner controls the first electromagnetic valve to open, the liquid nitrogen enters the first refrigeration pipeline, the third electromagnetic valve is started, the liquid nitrogen in the first refrigeration pipeline enters the circulation pipeline, the refrigeration function of the liquid nitrogen in the first refrigeration pipeline is realized, the second temperature controller controls the second electromagnetic valve to open and the fifth electromagnetic valve, most of the liquid nitrogen in the first refrigeration pipeline enters the second refrigeration pipeline through the second connecting pipeline to refrigerate the second liner, if the temperature set by the second liner is not reached at the moment, the second temperature controller controls the second electromagnetic valve to reduce the entering amount of the liquid nitrogen, the fourth electromagnetic valve is simultaneously opened, the liquid nitrogen in the circulation pipeline enters the second refrigeration pipeline to refrigerate the second liner, the liquid nitrogen flowing through the second refrigeration pipeline enters the circulation pipeline through the fifth connecting pipeline, the same principle can be applied to a third refrigerating pipeline and a fourth refrigerating pipeline to refrigerate the third liner and the fourth liner, so that the third liner and the fourth liner respectively reach the temperature set by the third temperature controller and the fourth temperature controller.
Meanwhile, the motor drives the blades to rotate, and the gas is blown out from the through holes, so that the temperature in the liner flows, the temperature in each position in the liner is kept the same, and the accuracy of the temperature controller measurement is improved.
After the technical scheme is adopted, the invention has the beneficial effects that:
the cascade liquid nitrogen refrigerating system ensures that liquid nitrogen runs in a system pipeline and cannot be directly sprayed to a refrigerating space, thereby being very safe; the system pipeline is fixed on the outer surface of the inner container, and heat conducting glue is seamlessly attached to the metal inner container to enhance the heat transfer effect; the system pipeline adopts a U-shaped arrangement mode of dense upper part and sparse lower part, thereby ensuring the uniformity of the temperature of the whole space in each cabin; the foaming layer between the inner container and the box body is filled, and the vacuum heat insulation plate is stuck in the box body, so that the heat insulation of the inner layer and the outer layer is realized to the maximum extent. Through the control of the electromagnetic valve, liquid nitrogen flows in series in each temperature zone cabin, and the refrigerating capacity of the liquid nitrogen is utilized to the maximum efficiency. Two options are provided for inputting liquid nitrogen into each temperature zone chamber, namely liquid nitrogen from the chamber which flows through the previous temperature zone in normal conditions, but when the liquid nitrogen of the previous temperature zone can not meet the cold requirement of the temperature zone, the other electromagnetic valve is opened, and liquid nitrogen at the temperature of-196 ℃ can directly flow into the temperature zone. And meanwhile, a plurality of cabins with different temperature areas are manufactured, so that the requirements of users on different temperature areas are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is another schematic structural view of the present invention;
FIG. 3 is a schematic structural view of a blower shield;
FIG. 4 is a schematic structural view of the inner container;
FIG. 5 is a schematic view of the temperature compartment;
fig. 6 is a schematic structural diagram of a system pipeline.
In the figure, 1-box; 2-temperature zone cabin; 3-a caster wheel; 4-a foamed layer; 5-a first liner body; 6-second gallbladder body; 7-third gallbladder body; 8-the fourth gallbladder body; 9-a first door body; 10-a second door body; 11-a third door body; 12-a fourth door body; 13-a first temperature controller; 14-a second temperature controller; 15-third temperature controller; 16-a fourth temperature controller; 17-a first refrigeration duct; 18-a second refrigeration duct; 19-a third refrigeration conduit; 20-a fourth refrigeration conduit; 21-a flow-through conduit; 22-a first connecting duct; 23-a second connecting duct; 24-a third connecting conduit; 25-a fourth connecting conduit; 26-a fifth connecting pipe; 27-a sixth connecting conduit; 28-a seventh connecting conduit; 29-an eighth connecting conduit; 30-a ninth connecting conduit; 31-a tenth connecting conduit; 32-an eleventh connecting conduit; 33-a first solenoid valve; 34-a second solenoid valve; 35-a third solenoid valve; 36-a fourth solenoid valve; 37-a fifth solenoid valve; 38-sixth solenoid valve; 39-seventh solenoid valve; 40-eighth solenoid valve; 41-ninth solenoid valve; 42-tenth solenoid valve; 43-a motor; 44-a fan shield; 45-eleventh solenoid valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, a cascade liquid nitrogen refrigerating apparatus includes a box 1, a plurality of temperature-zone compartments 2 provided with temperature controllers are provided in the box 1, the temperature controllers in each temperature-zone compartment 2 are set to different temperatures, a system pipeline is provided around the temperature-zone compartments 2, one end of the system pipeline extends out of the box 1 for inputting liquid nitrogen, the other end of the system pipeline extends out of the box 1 for outputting liquid nitrogen, a plurality of electromagnetic valves for adjusting the flow rate of liquid nitrogen are provided on the system pipeline, and the electromagnetic valves and the temperature controllers are electrically connected.
The bottom of the box body 1 is fixedly provided with a plurality of trundles 3. The temperature zone cabin 2 is fixedly connected with the inner wall of the box body 1 through the foaming layer 4, the inner container is placed in the temperature zone cabin 2 and comprises a container body and a door body, the container body is arranged in a rectangular mode, articles are placed in the container body, the system pipeline is arranged on the outer side of the container body in a surrounding mode, the door body and the container body are hinged to each other, and the temperature controller is fixedly arranged on the door body. The arrangement mode of the system pipeline is that the arrangement from the top of the inner container to the bottom of the inner container is from tight to loose.
The gallbladder bodies comprise a first gallbladder body 5, a second gallbladder body 6, a third gallbladder body 7 and a fourth gallbladder body 8;
the door bodies comprise a first door body 9, a second door body 10, a third door body 11 and a fourth door body 12;
the temperature controllers comprise a first temperature controller 13, a second temperature controller 14, a third temperature controller 15 and a fourth temperature controller 16;
the first door body 9 is hinged with the first liner body 5, the first temperature controller 13 is fixedly arranged on the first door body 9, the temperature set by the first temperature controller 13 is-150 to-190 ℃, the second door body 10 is hinged with the second liner body 6, the second temperature controller 14 is fixedly arranged on the second door body 10, the temperature set by the second temperature controller 14 is-80 to-120 ℃, the third door body 11 is hinged with the third liner body 7, the third temperature controller 15 is fixedly arranged on the third door body 11, the temperature set by the third temperature controller 15 is-20 to-60 ℃, the fourth door body 12 is hinged with the fourth liner body 8, the fourth temperature controller 16 is fixedly arranged on the fourth door body 12, and the temperature set by the fourth temperature controller 16 is 2 to 8 ℃.
The system pipeline comprises a first refrigeration pipeline 17, a second refrigeration pipeline 18, a third refrigeration pipeline 19 and a fourth refrigeration pipeline 20;
the first refrigeration pipeline 17 surrounds the outer side of the first liner body 5, the starting end of the first refrigeration pipeline 17 is arranged on the left side of the top of the first liner body 5, the first refrigeration pipeline 17 is arranged on the top of the first liner body 5, the side wall of the first liner body 5 and the bottom of the first liner body 5 in a U-shaped reciprocating mode in sequence in a surrounding mode, and the ending end of the first refrigeration pipeline 17 is arranged on the left side of the bottom of the first liner body 5;
the second refrigeration pipeline 18 surrounds the outer side of the second liner body 6, the starting end of the second refrigeration pipeline 18 is arranged on the left side of the top of the second liner body 6, the second refrigeration pipeline 18 is arranged on the top of the second liner body 6, the side wall of the second liner body 6 and the bottom of the second liner body 6 in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the second refrigeration pipeline 18 is arranged on the left side of the bottom of the second liner body 6;
the third refrigerating pipeline 19 surrounds the outer side of the third liner body 7, the starting end of the third refrigerating pipeline 19 is arranged on the left side of the top of the third liner body 7, the third refrigerating pipeline 19 is arranged on the top of the third liner body 7, the side wall of the third liner body 7 and the bottom of the third liner body 7 in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the third refrigerating pipeline 19 is arranged on the left side of the bottom of the third liner body 7;
A circulation pipeline 21 penetrates through the box body 1 from top to bottom, and liquid nitrogen is input from the top end of the circulation pipeline 21 and is output from the bottom end of the circulation pipeline 21;
a first connecting pipeline 22 is communicated between the starting end of the first refrigerating pipeline 17 and the circulating pipeline 21, a first electromagnetic valve 33 is arranged on the first connecting pipeline 22, a second connecting pipeline 23 is communicated between the finishing end of the first refrigerating pipeline 17 and the starting end of the second refrigerating pipeline 18, a second electromagnetic valve 34 is arranged on the second connecting pipeline 23, a third connecting pipeline 24 is communicated between the finishing end of the first refrigerating pipeline 17 and the circulating pipeline 21, and a third electromagnetic valve 35 is arranged on the third connecting pipeline 24, wherein the first electromagnetic valve 33 and the third electromagnetic valve 35 are electrically connected with the first temperature controller 13, and the second electromagnetic valve 34 is electrically connected with the second temperature controller 14;
a fourth connecting pipeline 25 is communicated between the starting end of the second refrigerating pipeline 18 and the circulating pipeline 21, a fourth electromagnetic valve 36 is arranged on the fourth connecting pipeline 25, a fifth connecting pipeline 26 is communicated between the finishing end of the second refrigerating pipeline 18 and the circulating pipeline 21, a fifth electromagnetic valve 37 is arranged on the fifth connecting pipeline 26, a sixth connecting pipeline 27 is communicated between the finishing end of the second refrigerating pipeline 18 and the starting end of the third refrigerating pipeline 19, a sixth electromagnetic valve 38 is arranged on the sixth connecting pipeline 27, wherein the fourth electromagnetic valve 36 and the fifth electromagnetic valve 37 are electrically connected with the second temperature controller 14, and the sixth electromagnetic valve 38 is electrically connected with the third temperature controller 15;
a seventh connecting pipeline 28 is communicated between the starting end of the third refrigerating pipeline 19 and the circulating pipeline 21, a seventh electromagnetic valve 39 is arranged on the seventh connecting pipeline 28, an eighth connecting pipeline 29 is communicated between the finishing end of the third refrigerating pipeline 19 and the starting end of the fourth refrigerating pipeline 20, an eighth electromagnetic valve 40 is arranged on the eighth connecting pipeline 29, a ninth connecting pipeline 30 is communicated between the finishing end of the third refrigerating pipeline 19 and the circulating pipeline 21, a ninth electromagnetic valve 41 is arranged on the ninth connecting pipeline 30, wherein the seventh electromagnetic valve 39 and the ninth electromagnetic valve 41 are electrically connected with the third temperature controller 15, and the eighth electromagnetic valve 40 is electrically connected with the fourth temperature controller 16;
a tenth connecting pipeline 31 is communicated between the starting end of the fourth refrigerating pipeline 20 and the circulating pipeline 21, a tenth electromagnetic valve 42 is arranged on the tenth connecting pipeline 31, an eleventh connecting pipeline 32 is communicated between the finishing end of the fourth refrigerating pipeline 20 and the circulating pipeline 21, and the tenth electromagnetic valve 42 and the eleventh electromagnetic valve are electrically connected with the fourth temperature controller 16.
Be provided with a plurality of fixed slots on the warm area cabin body, the one-to-one setting between fixed slot and the inner bag has placed motor 43 in the fixed slot, and motor 43 one side is connected and is provided with the blade, and blade one side is provided with fan protection casing 43, fixed connection between fan protection casing 43 and the courage body is provided with a plurality of through-holes on the fan protection casing 43.
In the invention, liquid nitrogen is injected from the top end of a circulation pipeline 21, a first temperature controller 13 in a first liner body 5 controls a first electromagnetic valve 33 to be opened, the liquid nitrogen enters a first refrigeration pipeline 17, a third electromagnetic valve 35 is started, the liquid nitrogen in the first refrigeration pipeline 17 enters the circulation pipeline 21, the refrigeration function of the liquid nitrogen in the first refrigeration pipeline 17 is realized, a second temperature controller 14 controls a second electromagnetic valve 34 to be opened, and a fifth electromagnetic valve 37 to be opened, most of the liquid nitrogen in the first refrigeration pipeline 17 enters a second refrigeration pipeline 18 through a second connection pipeline 23 to refrigerate the second liner, if the temperature set by the second liner cannot be reached at the moment, the second temperature controller 14 controls the second electromagnetic valve 34 to reduce the entering amount of the liquid nitrogen, simultaneously, the fourth electromagnetic valve 36 is opened, the liquid nitrogen in the circulation pipeline 21 enters the second refrigeration pipeline 18 to refrigerate the second liner, the liquid nitrogen flowing through the second refrigeration pipeline 18 enters the circulation pipeline 21 through a fifth connection pipeline 26, the same applies to the third refrigeration pipeline 19 and the fourth refrigeration pipeline 20 to refrigerate the third liner and the fourth liner, so that the third liner and the fourth liner reach the temperatures set by the third temperature controller 15 and the fourth temperature controller 16, respectively.
Meanwhile, the motor 43 drives the blades to rotate, and air is blown out from the through holes, so that the air temperature in the liner flows, the air temperature in each position in the liner is kept the same, and the accuracy of the temperature controller measurement is improved.
After the technical scheme is adopted, the invention has the beneficial effects that:
the cascade liquid nitrogen refrigerating system ensures that liquid nitrogen runs in a system pipeline and cannot be directly sprayed to a refrigerating space, thereby being very safe; the system pipeline is fixed on the outer surface of the inner container, and heat conducting glue is seamlessly attached to the metal inner container to enhance the heat transfer effect; the system pipeline adopts a U-shaped arrangement mode of dense upper part and sparse lower part, thereby ensuring the uniformity of the temperature of the whole space in each cabin; the foaming layer 4 between the inner container and the box body 1 is filled, and a vacuum heat insulation plate is stuck inside the box body 1, so that the heat insulation of the inner layer and the outer layer is realized to the maximum extent. Through the control of the electromagnetic valve, the liquid nitrogen flows in series in the compartments 2 of each temperature zone, and the refrigerating capacity of the liquid nitrogen is utilized to the maximum extent. Two options are available for the input of liquid nitrogen into each temperature zone chamber 2, namely, the liquid nitrogen normally flows through the last temperature zone chamber 2, but when the liquid nitrogen in the last temperature zone can not meet the cold requirement of the temperature zone, the other electromagnetic valve is opened, and the liquid nitrogen at the temperature of-196 ℃ directly flows into the temperature zone. And a plurality of cabins 2 with different temperature areas are manufactured simultaneously, so that the requirements of users on different temperature areas are met.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A cascade type liquid nitrogen refrigerating device is characterized by comprising a box body, wherein a plurality of temperature zone cabins provided with temperature controllers are arranged in the box body, the temperature controllers in each temperature zone cabin are set to be different in temperature, a system pipeline is arranged in each temperature zone cabin in a surrounding mode, one end of each system pipeline extends out of the box body and is used for inputting liquid nitrogen, the other end of each system pipeline extends out of the box body and is used for outputting liquid nitrogen, a plurality of electromagnetic valves used for adjusting the flow of the liquid nitrogen are arranged on each system pipeline, and the electromagnetic valves are electrically connected with the temperature controllers;
the bottom of the box body is fixedly provided with a plurality of trundles;
the temperature zone cabin is fixedly connected with the inner wall of the box body through a foaming layer, an inner container is placed in the temperature zone cabin, the inner container comprises a container body and a door body, the container body is arranged in a rectangular shape, articles are placed in the container body, the system pipeline is arranged on the outer side of the container body in a surrounding mode, the door body and the container body are hinged, and the temperature controller is fixedly arranged on the door body;
the gallbladder bodies comprise a first gallbladder body, a second gallbladder body, a third gallbladder body and a fourth gallbladder body;
the door body comprises a first door body, a second door body, a third door body and a fourth door body;
the temperature controllers comprise a first temperature controller, a second temperature controller, a third temperature controller and a fourth temperature controller;
the first door body is hinged with the first liner body, the first temperature controller is fixedly arranged on the first door body, the set temperature of the first temperature controller is-150 to-190 ℃, the second door body is hinged with the second liner body, the second temperature controller is fixedly arranged on the second door body, the set temperature of the second temperature controller is-80 to-120 ℃, the third door body is hinged with the third liner body, the third temperature controller is fixedly arranged on the third door body, the set temperature of the third temperature controller is-20 to-60 ℃, the fourth door body is hinged with the fourth liner body, the fourth temperature controller is fixedly arranged on the fourth door body, and the set temperature of the fourth temperature controller is 2 to 8 ℃;
the system pipeline comprises a first refrigeration pipeline, a second refrigeration pipeline, a third refrigeration pipeline and a fourth refrigeration pipeline;
the first refrigeration pipeline surrounds the outer side of the first liner body, the starting end of the first refrigeration pipeline is arranged on the left side of the top of the first liner body, the first refrigeration pipeline is arranged on the top of the first liner body, the side wall of the first liner body and the bottom of the first liner body in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the first refrigeration pipeline is arranged on the left side of the bottom of the first liner body;
the second refrigeration pipeline surrounds the outer side of the second liner body, the starting end of the second refrigeration pipeline is arranged on the left side of the top of the second liner body, the second refrigeration pipeline is arranged on the top of the second liner body, the side wall of the second liner body and the bottom of the second liner body in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the second refrigeration pipeline is arranged on the left side of the bottom of the second liner body;
the third refrigerating pipeline surrounds the outer side of the third liner body, the starting end of the third refrigerating pipeline is arranged on the left side of the top of the third liner body, the third refrigerating pipeline is arranged on the top of the third liner body in a U-shaped reciprocating manner, the side wall of the third liner body sequentially surrounds the third refrigerating pipeline to the bottom of the third liner body, and the ending end of the third refrigerating pipeline is arranged on the left side of the bottom of the third liner body;
the fourth refrigerating pipeline surrounds the outer side of the fourth liner body, the starting end of the fourth refrigerating pipeline is arranged on the left side of the top of the fourth liner body, the fourth refrigerating pipeline is arranged on the top of the fourth liner body, the side wall of the fourth liner body and the bottom of the fourth liner body in a U-shaped reciprocating mode in a surrounding mode in sequence, and the ending end of the fourth refrigerating pipeline is arranged on the left side of the bottom of the fourth liner body;
a circulation pipeline penetrates through the inside of the box body from top to bottom, and liquid nitrogen is input from the top end of the circulation pipeline and output from the bottom end of the circulation pipeline;
a first connecting pipeline is communicated and arranged between the starting end of the first refrigerating pipeline and the circulating pipeline, a first electromagnetic valve is arranged on the first connecting pipeline, a second connecting pipeline is communicated and arranged between the ending end of the first refrigerating pipeline and the starting end of the second refrigerating pipeline, a second electromagnetic valve is arranged on the second connecting pipeline, a third connecting pipeline is communicated and arranged between the ending end of the first refrigerating pipeline and the circulating pipeline, a third electromagnetic valve is arranged on the third connecting pipeline, the first electromagnetic valve and the third electromagnetic valve are electrically connected with the first temperature controller, and the second electromagnetic valve is electrically connected with the second temperature controller;
a fourth connecting pipeline is communicated and arranged between the starting end of the second refrigerating pipeline and the circulating pipeline, a fourth electromagnetic valve is arranged on the fourth connecting pipeline, a fifth connecting pipeline is communicated and arranged between the ending end of the second refrigerating pipeline and the circulating pipeline, a fifth electromagnetic valve is arranged on the fifth connecting pipeline, a sixth connecting pipeline is communicated and arranged between the ending end of the second refrigerating pipeline and the starting end of the third refrigerating pipeline, a sixth electromagnetic valve is arranged on the sixth connecting pipeline, the fourth electromagnetic valve and the fifth electromagnetic valve are electrically connected with the second temperature controller, and the sixth electromagnetic valve is electrically connected with the third temperature controller;
a seventh connecting pipeline is communicated and arranged between the starting end of the third refrigerating pipeline and the circulating pipeline, a seventh electromagnetic valve is arranged on the seventh connecting pipeline, an eighth connecting pipeline is communicated and arranged between the finishing end of the third refrigerating pipeline and the starting end of the fourth refrigerating pipeline, an eighth electromagnetic valve is arranged on the eighth connecting pipeline, a ninth connecting pipeline is communicated and arranged between the finishing end of the third refrigerating pipeline and the circulating pipeline, a ninth electromagnetic valve is arranged on the ninth connecting pipeline, wherein the seventh electromagnetic valve and the ninth electromagnetic valve are electrically connected with the third temperature controller, and the eighth electromagnetic valve is electrically connected with the fourth temperature controller;
a tenth connecting pipeline is communicated and arranged between the starting end of the fourth refrigerating pipeline and the circulating pipeline, a tenth electromagnetic valve is arranged on the tenth connecting pipeline, an eleventh connecting pipeline is communicated and arranged between the finishing end of the fourth refrigerating pipeline and the circulating pipeline, and the tenth electromagnetic valve and the eleventh electromagnetic valve are electrically connected with the fourth temperature controller.
2. The cascade type liquid nitrogen refrigerating device according to claim 1, wherein the temperature region chamber body is provided with a plurality of fixing grooves, the fixing grooves and the inner container are correspondingly arranged one by one, a motor is placed in each fixing groove, a blade is connected and arranged on one side of the motor, a fan protective cover is arranged on one side of the blade, the fan protective cover is fixedly connected with the inner container body, and a plurality of through holes are formed in the fan protective cover.
3. The cascade type liquid nitrogen refrigerating device according to claim 2, wherein the arrangement of the system pipelines is from tight to loose from the top of the inner container to the bottom of the inner container.
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| CN104748423A (en) * | 2013-12-30 | 2015-07-01 | 苏州三星电子有限公司 | Double-evaporator refrigerator refrigerating system and running method thereof |
| CN106196878A (en) * | 2016-08-04 | 2016-12-07 | 航天新长征电动汽车技术有限公司 | A kind of refrigerating device and liquid nitrogen refrigerating method thereof |
| CN106871541A (en) * | 2017-02-14 | 2017-06-20 | 合肥美的电冰箱有限公司 | The control method of refrigeration plant and reduction coolant noise |
| CN208382658U (en) * | 2018-01-19 | 2019-01-15 | 上海东富龙医疗装备有限公司 | A kind of gas phase low temperature nitrogen refrigerating plant |
| CN208920672U (en) * | 2018-07-31 | 2019-05-31 | 湖北交投莱克现代农业科技有限公司 | A kind of aquatic products liquid nitrogen quick freezer |
| CN109578100A (en) * | 2018-12-26 | 2019-04-05 | 天津大学 | A kind of heat exchange-power generation integrated system and control method using liquid nitrogen |
| CN109945582A (en) * | 2019-03-01 | 2019-06-28 | 珠海格力电器股份有限公司 | The control method of refrigerator system, refrigerator and temperature-changing chamber |
| CN110617660B (en) * | 2019-09-02 | 2021-10-15 | 北京航天发射技术研究所 | Liquid nitrogen refrigerating system of van-type refrigerator car and control method thereof |
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