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Array cylinder group type multi-stage laminated microchannel throttling heat exchange refrigerator

A column group and micro-channel technology, which is applied in the direction of refrigerators, refrigeration and liquefaction, lighting and heating equipment, etc., can solve the problems of low pressure bearing capacity of refrigerators, inability to stack multiple layers of structures, and limited temperature of cold ends, etc., to achieve Good throttling effect

Active Publication Date: 2021-08-24
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned throttling refrigerator has low pressure bearing capacity, the inflow gas pressure is limited by the silicon material, and there is limited space for the cooling temperature to drop. At the same time, its structure cannot be stacked in multiple layers, resulting in a small air intake and low cooling capacity.
In addition, the existing micro-channel refrigerator is a single-stage heat recovery, throttling refrigeration, using a refrigerant, the final cooling temperature is limited
[0004] In summary, the existing micro-channel throttling refrigerators have small air intake, low heat transfer efficiency, and limited cold-end temperature, which restricts the application and development of micro-channel throttling refrigerators.

Method used

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  • Array cylinder group type multi-stage laminated microchannel throttling heat exchange refrigerator
  • Array cylinder group type multi-stage laminated microchannel throttling heat exchange refrigerator
  • Array cylinder group type multi-stage laminated microchannel throttling heat exchange refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 , 2 As shown, the array cylinder group multi-stage laminated microchannel throttling heat exchange refrigerator includes an upper cover plate c stacked in sequence, a plurality of upper plates h and a plurality of lower plates g stacked staggered up and down, and a lower cover Plate f, high-pressure gas inlet pipe a, low-pressure gas outlet pipe b, high-pressure gas outlet pipe d, and low-pressure gas inlet pipe e.

[0034] The upper and lower upper cover plates c and lower cover plates f with a certain thickness play a role in supporting and stabilizing the entire refrigerator.

[0035] The upper cover plate c is respectively provided with through high-pressure gas inlet holes and low-pressure gas outlet holes.

[0036] The upper plate h is rectangular, including the inlet and outlet sections, the channel section and the evaporation chamber hi.

[0037] Such as image 3 As shown, the entrance and exit section has a high-pressure inlet hole ha, a hi...

Embodiment 2

[0085] Such as Figure 11 , Figure 12As shown, the other structure of this embodiment is the same as that of Embodiment 1, except that the flow channel h1, flow channel h3, flow channel h4, flow channel g3, and flow channel g6 in embodiment 1 are changed from S-shaped channels to straight rectangular channels. , the rectangular channel is a concave rectangular groove set on the plate, and the raised cylindrical needle rib set in the flow channel is cancelled.

[0086] When the gas passes through the flow channel h1, it will be accompanied by the Bernoulli effect and the burnt soup effect, and the Bernoulli effect is dominant at this stage, and the connection between the flow channel h1 and the flow channel h3 adopts the form shown in h8' , the high-pressure gas produces a large pressure drop here after passing through the h1 channel, forming the first throttling and cooling, and at the same time, it can be pre-cooled by the low-pressure gas after throttling by the lower plat...

Embodiment 3

[0088] Such as Figure 13 , Figure 14 As shown, the other structure of this embodiment is the same as that of Embodiment 1, except that the flow channel h1, flow channel h3, flow channel h4, flow channel g3, and flow channel g6 in Example 1 are changed from S-shaped channels to be set in channels A plurality of columns arranged in forked rows are used for throttling and support.

[0089] Function and effect of embodiment

[0090] The structural innovation of the array cylinder group type multi-stage laminated microchannel throttling heat exchange refrigerator in this embodiment is to completely isolate the high and low pressure gas from entering the refrigerator to recovering the gas, which is suitable for the mixing of high and low pressure gases Afterwards, they will affect each other's properties or the situation of the reaction; secondly, the two kinds of gases in this structure are throttled and cooled twice. The flow can generate more cold energy into the evaporation...

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Abstract

The array cylinder group type multi-stage laminated microchannel throttling heat exchange refrigerator of the present invention comprises an upper cover plate, a plurality of upper plates, a plurality of lower plates, and a lower cover plate stacked in sequence, and the upper plate includes a channel section , the channel section includes a first flow channel, a second flow channel, a third flow channel, and a fourth flow channel, and the first flow channel, the second flow channel, the third flow channel, and the fourth flow channel all have In the concave S channel, the first flow channel, the third flow channel, and the fourth flow channel are respectively provided with a plurality of raised cylindrical pin fins, and the density of cylindrical pin fins in the fourth flow channel is greater than that in the third flow channel , the density of cylindrical needle fins in the third flow channel is greater than that in the first flow channel, the first flow channel is adjacent to the second flow channel, the length of the first flow channel and the second flow channel along the channel section are the same, the third flow channel One end of the channel communicates with the first channel, the other end communicates with the fourth channel, one end of the fourth channel communicates with the third channel, and the other end communicates with the evaporation chamber.

Description

technical field [0001] The invention belongs to the field of enhanced heat exchange throttling refrigeration, and in particular relates to an array column group type multi-stage laminated microchannel throttling heat exchange refrigerator formed by microchannel two-stage throttling precooling. Background technique [0002] Miniature throttling refrigerators use the Joule-Thomson effect (J-T effect) for refrigeration, and are widely used in occasions with small size and space, such as inner cavity cryotherapy, infrared night vision devices, etc. At present, the main J-T effect refrigerator still adopts the Hampson type (spiral finned tube type), the stainless steel tube with an outer diameter of 0.5mm-1mm is wound around the mandrel, and the high-pressure gas flows through the entire stainless steel tube and enters the capillary throttling of the tube head. . The throttled low-pressure gas flows back and skims the outer fins of the stainless steel tube to pre-cool the incomi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/02
CPCF25B9/02
Inventor 崔晓钰耿晖王鹏佘海龙
Owner UNIV OF SHANGHAI FOR SCI & TECH
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