A refrigerated container based on liquid nitrogen refrigeration

Abstract

The utility model discloses a refrigerated container based on liquid nitrogen refrigeration, including a box body, a storage chamber is provided at the front end of the box body, a box door is provided at the rear end of the box body, a liquid nitrogen storage tank is provided in the storage chamber, an air distribution pipe is provided at the top of the box body, a plurality of air nozzles are provided at intervals at the lower side of the air distribution pipe, the liquid nitrogen storage tank is connected to the air distribution pipe through an air supply pipe, a solenoid valve is provided on the air supply pipe, and the air supply pipe is connected to the liquid nitrogen storage tank through a quick connector. The refrigerated container in the utility model sends the gasified low-temperature nitrogen into the container through the liquid nitrogen storage tank, the air distribution pipe, the air supply pipe and the nozzle, so as to cool the container, without providing additional power equipment, effectively reducing energy consumption and use costs.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerated containers, in particular to a refrigerated container based on liquid nitrogen refrigeration. Background Art

[0002] A refrigerated container is a special container that has good thermal insulation and can maintain a certain low temperature requirement. It is suitable for the transportation and storage of various perishable foods. It is specially designed for transporting frozen goods or low-temperature goods that must be maintained at a certain temperature.

[0003] At present, common refrigerated containers generally use compressor refrigeration. Taking a 45-foot refrigerated container as an example, the refrigeration machine power is 12.6kW, and the compressor is driven by a four-cylinder 2.5-liter diesel engine. The fuel consumption is 3-3.5 liters per hour. Calculated at 7.5 yuan per liter of diesel, the cost of refrigeration per hour is as high as 22.5-26.25 yuan. Therefore, the cost is extremely high. It is necessary to use a low-cost refrigeration method to replace traditional compressor refrigeration. Utility Model Content

[0004] In order to solve the above technical problems, the utility model discloses a refrigerated container based on liquid nitrogen refrigeration, comprising a box body, a storage chamber is provided at the front end of the box body, a box door is provided at the rear end of the box body, a liquid nitrogen storage tank is provided in the storage chamber, an air distribution pipe is provided on the top of the box body, a plurality of air nozzles are provided at intervals on the lower side of the air distribution pipe, the liquid nitrogen storage tank is connected to the air distribution pipe through an air supply pipe, a solenoid valve is provided on the air supply pipe, and the air supply pipe and the liquid nitrogen storage tank are connected through a quick connector.

[0005] Furthermore, a manual valve is provided at the outlet of the liquid nitrogen storage tank.

[0006] Furthermore, a pressure relief valve is provided on the air supply pipe between the solenoid valve and the quick connector.

[0007] Furthermore, a telescopic slide rail is provided on each side of the bottom of the storage chamber, a base is slidably provided above the telescopic slide rail, a fixed seat is provided on each side of the base, a telescopic rod is provided on the inner side of the fixed seat, and an arc-shaped positioning plate is provided at the front end of the telescopic rod.

[0008] Furthermore, a limit spring is sleeved on the outside of the telescopic rod at a position between the fixing seat and the arc-shaped positioning plate.

[0009] Furthermore, an arc-shaped positioning plate is provided inside the storage chamber at the rear side of the liquid nitrogen storage tank, and both ends of the arc-shaped positioning plate are rotatably connected to an arm, and the front sides of the two arms are connected by a locking assembly.

[0010] Furthermore, the locking assembly includes a first locking block and a second locking block, one end of the first locking block is fixedly connected to one of the arms, one end of the second locking block is fixedly connected to the other arm, the first locking block is inserted into the second locking block and the two are locked longitudinally by a latch.

[0011] The beneficial effects of the utility model are:

[0012] The refrigerated container of the utility model delivers gasified low-temperature nitrogen into the container through a liquid nitrogen storage tank, an air distribution pipe, an air delivery pipe and a nozzle, thereby cooling the container without providing additional power equipment, thereby effectively reducing energy consumption and use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the bottom structure of the storage chamber in the utility model;

[0017] Figure 4 It is a schematic diagram of the top view of the arm structure in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the locking component in the utility model.

[0019] Reference numerals:

[0020] 1-box, 2-storage room, 3-box door, 4-liquid nitrogen storage tank, 5-air distribution pipe, 6-air nozzle, 7-air supply pipe, 8-solenoid valve, 9-quick connector, 10-manual valve, 11-pressure relief valve, 12-telescopic slide rail, 13-base, 14-fixed seat, 15-telescopic rod, 16-arc positioning plate, 17-limit spring, 18-arc positioning plate, 19-arm, 20-first locking block, 21-second locking block, 22-latch. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0024] In the description of the embodiments, unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or it can be connected through an intermediate medium, or it can be a communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] like Figure 1 As shown, the refrigerated container based on liquid nitrogen refrigeration in this embodiment includes a box body 1, a storage chamber 2 is provided at the front end of the box body 1, a box door 3 is provided at the rear end of the box body 1, a liquid nitrogen storage tank 4 is provided in the storage chamber 2, an air distribution pipe 5 is provided on the top of the box body 1, a plurality of air nozzles 6 are provided at intervals on the lower side of the air distribution pipe 5, and the liquid nitrogen storage tank 4 is connected to the air distribution pipe 5 through an air supply pipe 7.

[0026] Among them, the liquid nitrogen storage tank 4 can adopt a low-pressure liquid nitrogen tank, and the internal gas pressure is usually between 0.5 and 0.8 MPa; liquid nitrogen is a liquid obtained by colorless, odorless, non-corrosive, non-polluting, and non-flammable nitrogen in an extremely low temperature environment. It has extremely high safety and low production cost, and is an ideal refrigerant.

[0027] like Figure 2 As shown, a solenoid valve 8 is provided on the air supply pipe 7, and the air supply pipe 7 is connected to the liquid nitrogen storage tank 4 through a quick connector 9. A manual valve 10 is provided at the outlet of the liquid nitrogen storage tank 4, and a pressure relief valve 11 is also provided on the air supply pipe 7 between the solenoid valve 8 and the quick connector 9.

[0028] Among them, the solenoid valve 8 is used to control the delivery of liquid nitrogen, the manual valve 10 is in a normally open state during operation and is closed only when the liquid nitrogen storage tank 4 is replaced, and the pressure relief valve 11 is used to relieve the pressure on the pipeline when the liquid nitrogen storage tank 4 is replaced to prevent the low-temperature nitrogen in the pipeline from freezing the staff.

[0029] When the solenoid valve 8 is opened, the internal pressure of the liquid nitrogen storage tank 4 is higher than the pressure at the end of the gas distribution pipe 5, the liquid nitrogen vaporizes and expands toward the normal pressure side, and the low-temperature nitrogen is ejected from the air nozzle 6 to cool the inside of the box 1. This method can avoid damage to the food caused by directly spraying liquid nitrogen on the food, and can also achieve the effect of rapid cooling.

[0030] like Figure 3 As shown, a telescopic slide rail 12 is provided on each side of the bottom of the storage chamber 2, a base 13 is slidably provided above the telescopic slide rail 12, a fixed seat 14 is provided on each side of the base 13, a telescopic rod 15 is provided on the inner side of the fixed seat 14, an arc-shaped positioning plate 16 is provided at the front end of the telescopic rod 15, and a limit spring 17 is sleeved on the outside of the telescopic rod 15 at a position between the fixed seat 14 and the arc-shaped positioning plate 16.

[0031] When replacing the liquid nitrogen storage tank 4, first disconnect the quick connector 9, then pull the base 13 out of the storage chamber 2, take out the used liquid nitrogen storage tank 4, and replace it with a new one; the arc-shaped positioning plate 16 clamps the bottom of the liquid nitrogen storage tank 4 under the action of the limit spring 17, thereby positioning the liquid nitrogen storage tank 4.

[0032] like Figure 4 As shown, an arc-shaped positioning plate 18 is provided inside the storage chamber 2 at the rear side of the liquid nitrogen storage tank 4, and both ends of the arc-shaped positioning plate 18 are rotatably connected to an arm 19, and the front sides of the two arms 19 are connected by a locking assembly.

[0033] like Figure 5 As shown, the locking assembly includes a first locking block 20 and a second locking block 21. One end of the first locking block 20 is fixedly connected to one of the arms 19, and one end of the second locking block 21 is fixedly connected to the other arm 19. The first locking block 20 is inserted into the second locking block 21 and the two are locked longitudinally by a latch 22.

[0034] The liquid nitrogen storage tank 4 is clamped and fixed by two arms 19 to prevent the liquid nitrogen storage tank 4 from shaking excessively during transportation; when replacing the liquid nitrogen storage tank 4, the pin 22 can be pulled out to disconnect the connection between the first locking block 20 and the second locking block 21, and then the arms 19 on both sides are flipped outward to replace the liquid nitrogen storage tank 4.

[0035] The average cooling rate of traditional compressor refrigerated containers is 31.3℃ / h, about 0.5℃ / m, while the cooling rate of liquid nitrogen can reach 7-15℃ / m, which is dozens of times that of traditional refrigerated containers.

[0036] At standard atmospheric pressure, the density of liquid nitrogen is 808 kg / m 3 (-195.8℃), taking a 45-foot container as an example, 1m 3 The volume of liquid nitrogen that can be gasified into nitrogen at 0°C is: 808 / 86 (container volume)*22.4 (gas molar volume) = 210.5m 3 , which is close to 3 times the container volume, can effectively meet the medium and short-distance transportation needs of refrigerated containers; and according to the different nitrogen raw materials, energy consumption, equipment and labor costs, the preparation cost of liquid nitrogen is roughly 2-4 yuan / m 3 , greatly reducing the refrigeration cost of refrigerated containers.

[0037] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement; when the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the utility model.

Claims

1. A refrigerated container based on liquid nitrogen refrigeration, characterized in that: It comprises a box body, a storage chamber is provided at the front end of the box body, a box door is provided at the rear end of the box body, a liquid nitrogen storage tank is provided in the storage chamber, an air distribution pipe is provided at the top of the box body, a plurality of air nozzles are provided at intervals at the lower side of the air distribution pipe, the liquid nitrogen storage tank is connected with the air distribution pipe through an air supply pipe, a solenoid valve is provided on the air supply pipe, and the air supply pipe is connected with the liquid nitrogen storage tank through a quick connector.

2. The refrigerated container based on liquid nitrogen refrigeration according to claim 1, characterized in that: A manual valve is provided at the outlet of the liquid nitrogen storage tank.

3. The refrigerated container based on liquid nitrogen refrigeration according to claim 1, characterized in that: A pressure relief valve is also provided on the air supply pipe between the solenoid valve and the quick connector.

4. The refrigerated container based on liquid nitrogen refrigeration according to claim 1, characterized in that: A telescopic slide rail is provided on each side of the bottom of the storage chamber, a base is slidably provided above the telescopic slide rail, a fixed seat is provided on each side of the base, a telescopic rod is provided inside the fixed seat, and an arc-shaped positioning plate is provided at the front end of the telescopic rod.

5. The refrigerated container based on liquid nitrogen refrigeration according to claim 4, characterized in that: A limit spring is sleeved on the outside of the telescopic rod at a position between the fixing seat and the arc-shaped positioning plate.

6. The refrigerated container based on liquid nitrogen refrigeration according to claim 1, characterized in that: An arc-shaped positioning plate is provided inside the storage chamber at the rear side of the liquid nitrogen storage tank, and both ends of the arc-shaped positioning plate are rotatably connected to a holding arm, and the front sides of the two holding arms are connected by a locking assembly.

7. The refrigerated container based on liquid nitrogen refrigeration according to claim 6, characterized in that: The locking assembly includes a first locking block and a second locking block, one end of the first locking block is fixedly connected to one of the arms, one end of the second locking block is fixedly connected to the other arm, the first locking block is inserted into the second locking block and the two are locked longitudinally by a latch.

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