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Multistage single-side pre-cooling laminated microchannel throttling heat exchanging refrigerator

A technology of micro-channel and refrigerator, which is applied in refrigerators, refrigeration and liquefaction, lighting and heating equipment, etc. It can solve the problems of limited refrigeration temperature, inability to stack multiple layers of structures, and low heat exchange efficiency

Active Publication Date: 2019-11-22
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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  • Multistage single-side pre-cooling laminated microchannel throttling heat exchanging refrigerator
  • Multistage single-side pre-cooling laminated microchannel throttling heat exchanging refrigerator
  • Multistage single-side pre-cooling laminated microchannel throttling heat exchanging refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 , 2 As shown, the multi-stage single-side precooled stacked 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 up and down staggered, and a lower plate g. 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.

[0041]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.

[0042] The upper cover plate c is respectively provided with through high-pressure gas inlet holes and low-pressure gas outlet holes.

[0043] The upper plate h is rectangular, including the inlet and outlet sections, the channel section and the evaporation chamber hi.

[0044] Such as image 3 As shown, the entrance and exit section has a high-pressure inlet hole h...

Embodiment 2

[0092] The other structures of this embodiment are the same as those of the first embodiment, except that the upper plate and the lower plate in this embodiment are different from the upper plate and the lower plate in the first embodiment.

[0093] Such as Figure 11 As shown, the upper plate H is rectangular, including the inlet and outlet sections, the channel section and the evaporation chamber Hi.

[0094] The inlet and outlet section has a high-pressure inlet hole Ha, a high-pressure outlet hole Hd, a low-pressure outlet hole Hb, a low-pressure inlet hole He, a concave high-pressure inlet groove Hac, and a concave low-pressure outlet groove Hbc.

[0095] The high-pressure inlet hole Ha is connected to the high-pressure inlet groove Hac, the low-pressure outlet hole Hb is connected to the low-pressure outlet groove Hbc, the high-pressure outlet hole Hd, the low-pressure inlet hole He are not connected to the high-pressure inlet groove Hac and the low-pressure outlet groov...

Embodiment 3

[0130] Such as Figure 18 , Figure 19 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.

[0131] Function and effect of embodiment

[0132] The structural innovation of the multi-stage single-side precooled 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 high and low pressure gases After mixing, they will affect each other's properties or react. Secondly, the two gases in this structure are throttled and cooled twice. The throttling and cooling of the low-pressure gas can fully pre-cool the high-pressure gas. Throttling can ...

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Abstract

The invention discloses a multistage single-side pre-cooling laminated microchannel throttling heat exchanging refrigerator. The multistage single-side pre-cooling laminated microchannel throttling heat exchanging refrigerator comprises sequentially stacked upper cover plates, multiple upper sheet bars and multiple lower sheet bars which are stacked up and down in a stagger manner, and a lower cover plate. Each upper sheet bar comprises an outlet and inlet segment, a channel segment and an evaporation cavity, wherein the channel segment comprises a first flowing channel, a second flowing channel, a third flowing channel and a fourth flowing channel, the first flowing channel comprises multiple straight channels in the length direction of the channel segment, one end of the first flowing channel communicates with a high-pressure inlet groove, the other end of the first flowing channel communicates with the third flowing channel, the second flowing channel is provided with an inwards-concaved S channel, one end of the second flowing channel communicates with a low-pressure outlet groove, the third flowing channel and the fourth flowing channel both comprise multiple straight channelsin the length direction of the channel segment, the straight channels are inwards-concaved rectangular grooves, the inwards-concaved depths are smaller than the thickness of the upper sheet bars, oneend of the third flowing channel communicates with the first flowing channel, the other end of the third flowing channel communicates with the fourth flowing channel, one end of the fourth flowing channel communicates with the third flowing channel, and the other end of the fourth flowing channel communicates with the evaporation cavity.

Description

technical field [0001] The invention belongs to the field of enhanced heat exchange throttling refrigeration, and in particular relates to a multi-stage one-side precooling laminated microchannel throttling heat exchange refrigerator of a heat exchange unit 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/02
CPCF25B9/02
Inventor 崔晓钰耿晖常志昊佘海龙
Owner UNIV OF SHANGHAI FOR SCI & TECH
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