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Novel efficient total heat exchange membrane and total heat exchanger

A technology of total heat exchange membrane and polymer, which is applied in the field of new high-efficiency total heat exchange membrane and total heat exchanger, can solve the problem of incomparable performance, low heat exchange efficiency and energy efficiency ratio, and new air energy exchanger total heat exchange. Membrane performance is not up to the problem, to achieve the effect of improving harmful gas barrier, improving enthalpy and moisture exchange efficiency, and improving indoor air quality

Active Publication Date: 2014-06-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As supporting equipment for air-conditioning systems, the air-conditioning heat recovery fresh air optimization system is still in its infancy in China. The main reason is that the basic materials and supporting equipment of related products have not yet formed professional and large-scale production, such as the new air energy exchanger. The performance of the key material—the total heat exchange membrane cannot reach the level of developed countries, and the imported total heat exchange membrane is expensive, and other countries have always implemented stricter technical confidentiality measures against our country
Therefore, most domestic enterprises use low-cost filter paper or metal heat transfer sheets, and the performance of these materials is far inferior to that of imported full heat exchange paper, which cannot realize the adjustment and recovery of air energy and humidity.
These paper "heat exchange membranes" generally have disadvantages such as high exhaust gas leakage rate, low energy efficiency ratio of heat exchange efficiency, easy moisture absorption and mildew, which seriously affect the energy saving and environmental protection effect and service life of the total heat exchanger.

Method used

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  • Novel efficient total heat exchange membrane and total heat exchanger

Examples

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preparation example Construction

[0062] Preparation method of total heat exchange membrane

[0063] The preparation method of total heat exchange membrane of the present invention comprises the following steps:

[0064] (a) providing the first casting solution containing the first high polymer, the first moisture absorbing agent, and inorganic functional additives; providing the second casting solution containing the second high polymer and the second moisture absorbing agent;

[0065] (b) forming a film from the first casting solution obtained in step (a), optionally, casting the first casting solution on the second support layer to form a film;

[0066] (c) compounding the inorganic salt on the membrane prepared in the step (b) to obtain the first supporting layer;

[0067] (d) casting the second casting solution on the first supporting layer obtained in the step (c), and compounding to obtain the total heat exchange membrane according to claim 1, wherein,

[0068] The first high polymer, the second suppo...

Embodiment 1

[0097] Step (1). Dissolve 15 parts of cellulose acetate in 150 parts of acetic acid aqueous solution with a mass content of 80%, and then add 10 parts of n-methylpyrrolidone, 5 parts of lithium chloride and 3 parts of 4A molecular sieves, and stir at 45 °C for 18 hours , dissolved to obtain a uniformly dispersed casting solution;

[0098] Step (2). Put the casting solution obtained in step (1) at 45° C. under negative pressure or leave it standing for 10 hours for defoaming;

[0099] Step (3). Apply the defoamed casting solution to 80g / m 2 On ordinary cellulose paper, the thickness is controlled to 140 μm, and then put into water for phase transition curing;

[0100] Step (4). The cured film is soaked in 12% lithium chloride solution for 24 hours to obtain a hydrophilic polymer support layer;

[0101] Step (5). Dissolve 10 parts of polyvinyl alcohol in 90 parts of distilled water, then add 10 parts of sorbitol, stir at 90° C. for 18 hours, and dissolve to obtain a uniformly ...

Embodiment 2

[0106] Step (1). Dissolve 90 parts of glacial acetic acid and 10 parts of cellulose acetate, then add 6 parts of glycerin and 1 part of X-type molecular sieve, stir at 55°C for 12 hours, and dissolve to obtain a uniformly dispersed casting solution;

[0107] Step (2). Put the casting liquid obtained in step (1) at 60° C. under negative pressure or leave it standing for 10 hours to perform defoaming;

[0108] Step (3). Apply the defoamed casting solution to 60g / m 2 Polypropylene non-woven fabric with a controlled thickness of 80 μm, and then enters the water tank for phase transition curing;

[0109] Step (4). The cured film is soaked in 20% calcium chloride solution for 30 hours to obtain a hydrophilic polymer support layer;

[0110] Step (5). Dissolve 12 parts of polyethylene glycol in 75 parts of ethanol, then add 13 parts of lithium chloride, stir at 70° C. for 15 hours, and dissolve to obtain a uniformly dispersed casting solution;

[0111] Step (6). Put the casting solu...

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Abstract

The invention discloses a novel efficient total heat exchange membrane and a total heat exchanger. The total heat exchange membrane includes: a first support layer, which comprises a first high polymer, a first moisture absorbent, an antibacterial agent, an inorganic functional additive, and an inorganic salt; an active layer, which contains a second high polymer, a second moisture absorbent; and an optional second support layer. The first support layer is located between the second support layer and the active layer. The invention also discloses a preparation method of the total heat exchange membrane and the total heat exchanger using the membrane. The total heat exchange membrane provided by the invention has the advantages of excellent moisture permeability, effective blocking of harmful gas, good heat exchange performance, and less mixing of air supply and air exhaust, can provide fresh air to the indoor, remove foul and harmful air, and simultaneously recover sensible heat and latent heat.

Description

technical field [0001] The invention relates to a total heat exchange membrane and a total heat exchanger, in particular to a novel high-efficiency total heat exchange membrane and a total heat exchanger. Background technique [0002] The new air-conditioning heat recovery fresh air optimization system can keep the indoor air circulation and get fresh air at the same time, through the exchange of energy and humidity between the external fresh air and the exhausted turbid air on the total heat exchange membrane, and recover the cold in the indoor air. Volume or heat, adjust the humidity of external fresh air. Moreover, the gas barrier properties of the total heat exchange membrane can ensure that dirty air and fresh air do not mix, effectively ensuring indoor air quality and building energy saving and emission reduction. social demands. Public places such as KTV / bars / Internet cafes, banks, and office buildings have the characteristics of concentrated personnel, closed build...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D69/12B01D67/00B01D71/16B01D71/38B01D71/82B01D71/68B01D71/56B01D53/22F24F3/147B32B27/08
Inventor 薛立新杜旭东陈修碧黄燕赵秀兰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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