KR20080092637A - Heat exchanger with excellent heat exchange - Google Patents

Abstract

A heat exchanger with the excellent heat exchange is provided to exchange the heat effectively by using a moisture absorbent through a dyeing or coating process, and to improve the residential environment. An indoor room temperature air and an outdoor high- or low-temperature air is circulated across the partitioning materials(12) spaced by space support materials(11). The heat exchange is performed through the partitioning materials by the indoor and the outdoor air current. The space support materials and the partitioning materials are formed of the mixture of a cellulose fiber of 60-90 weight%, a resistant of 5-10 weight%, a filler of 3-25 weight% and a wet-strength agent of 2.0-5 weight%. The thickness of the space support materials and the partitioning materials is 1.0-5 millimeters, and the basis weight is 75 g/m^2, and the drainability is 100-124 milliliter CSF(canadian standard freeness). Calcium carbonate as a moisture absorbent is applied or impregnated to the space support materials and the partitioning materials.

Description

Heat exchanger with excellent heat exchange {HEAT EXCHANGER WITH EXCELLENT HEAT EXCHANGE}

1 is a perspective view showing the operation concept of the heat exchanger.

2 is a perspective view showing a conventional heat exchanger.

3 is a cross-sectional view showing a conventional heat exchanger component.

4 is a cross-sectional view showing a heat exchange cell component member according to the present invention.

5 is a schematic diagram schematically showing a creping process according to the present invention.

Figure 6 is a perspective view showing the configuration of the pressing roll according to the creping process of the present invention.

Description of the main symbols in the drawings

10: crimping roll

20: waveform roll

11: spacing member

12: partition member

21: absorbent

The present invention relates to a crepe heat exchange paper having a high heat exchange efficiency, and more particularly, to a room between the room temperature air and the outdoor high temperature or low temperature air between the partition member spaced by the gap holding member. The heat exchange paper is a laminated structure in which two kinds of air flows are subjected to total heat exchange through the partition member. The present invention relates to a heat exchange paper having excellent total heat exchange by applying or coating a moisture absorbent to a heat exchange material formed at a blending ratio.

Recently, various mechanical air conditioning systems have been developed to improve the indoor environment of living spaces by operating air conditioners in summer and heating devices in winter.

However, most of these air conditioning systems use electric energy as a driving heat source, and in Korea, in a high temperature and high humidity environment, the need for cooling in the summer is urgent, so the annual amount of electricity used in summer is much higher than in winter.

In addition to these phenomenal aspects, there is a need for an air-conditioning system that can contribute to environmental conservation by conserving energy while increasing the comfort and health of current residents. Much effort is being made to get it at cost.

In particular, there is a need for a technology for recycling energy during periodic ventilation in a residential environment, and heat exchange paper capable of recovering temperature and humidity for such a demand is an important energy saving means.

Such a heat exchanger has been disclosed in the Republic of Korea Patent Publication No. 10-2005-0076787 (published date 2005.07.27) for a heat exchange paper and a heat exchange ventilator having a low humidity and high humidity exchange efficiency.

However, the disclosed patent had a problem that the water absorption rate is lowered and the total heat exchange falls, and there is a problem in that latent heat exchange is not performed well by impregnating an absorbent only to the partition member.

In order to solve the above problems, the present invention provides a heat exchange material of the partition member and the space maintaining member constituting the heat exchange paper constituent member, and by applying a moisture absorbent on the surface of the heat exchange material excellent heat exchange with excellent heat exchange function It is aimed at providing heat exchange paper.

In order to achieve the above object, the present invention provides a room between the room temperature air and the outdoor high-temperature or low-temperature air between the partition member is maintained by the gap holding member, the two kinds of indoor and outdoor As a heat exchange paper of a laminated structure in which the air flow of the heat exchange through the partition member,

The gap maintaining member and the partition member are made of a mixture of 60 to 90% by weight of cellulose fiber, 5 to 10% by weight of flame retardant, 3 to 25% by weight of filler, and 2.0 to 5% by weight of humectant. It consists of that consisting of.

The gap maintaining member and the partition member have a thickness of 1.0 to 5 mm, a basis weight of 75 g / m 2, and a degree of freedom of 100 to 124 ml CSF (Canadian Standard Freeness).

The gap maintaining member and the partition member are characterized in that the calcium carbonate, which is an absorbent, is coated or impregnated.

The humectant is a water soluble polyamide epoxy (Polyamade Epoxy) resin having a viscosity of 50 cps.

The gap maintaining member is a pair of materials composed of 60 to 90% by weight of cellulose fiber, 5 to 10% by weight of flame retardant, 3 to 25% by weight of filler, and 2.0 to 5% by weight of humectant. After pressing at high density using a pressing roll of, it was made into a corrugated shape having a valley and a floor by passing a pair of corrugated rolls maintaining a temperature of 100 to 120 ° C., and the vertical length between the valley and the floor. Is 1.5 to 3 mm, and the length between the bone and the valley and the floor and the floor is 3 to 5 mm.

Hereinafter, the technical configuration will be described in more detail.

Electric heat refers to the temperature of air and the energy of humidity. The heat transfer is performed by transferring temperature (sensible heat) and humidity (latent heat) through the partition member.

In the present invention, the latent heat exchange (heat exchange of moisture) is made of a pulp material, and the heat exchange paper composed of a gap retaining member and a partition member made of the material has a simple structure and no moving parts. It is advantageous in that it is small and durable and does not require auxiliary energy such as power used in a rotary rotor.

The reason for such a total heat exchange is to prevent energy loss caused by indoor air not being recycled and discharged outside, and the solution is to recover the energy through total heat exchange. The total heat exchange is performed through the partition member by distributing two types of air streams with the partition member therebetween.

The heat exchange paper, consisting of a combination of the diaphragm member and the spacing member, correlates the total heat transfer rate with the fluid temperature at the inlet and outlet, the total heat transfer coefficient, and the total surface area for heat transfer for the purpose of predicting its design or performance. It is essential.

If the heat transfer between the heat exchanger and its surroundings can be ignored, and the changes in potential and kinetic energy can also be ignored, then the total heat transfer rate q can be written as

q = m _h (i _{h , i} -i _{h , o} ) ------------ (1-1)

q = m _c (i _{c , i} -i _{c , o} ) ------------ (1-2)

(Where i: enthalpy of fluid, subscript h: high temperature fluid, subscript c: low temperature fluid, subscript i: fluid inlet condition, subscript o: fluid outlet condition.)

Next, look at the material of the gap maintaining member and the partition member.

As mentioned above, the heat exchange paper of the present invention refers to a combination of a gap keeping member and a partition member, and the gap holding member and the partition member are cellulose fibers, flame retardants, fillers, and wet strength agents. And a material formed by mixing a fixing agent.

Here, the cellulose fiber is used at 60 to 90% by weight relative to the total mixing ratio of the material, when less than 60% by weight is used in creping of the gap holding member described later, it is used in excess of 90% by weight When the heat exchange is not performed well if the problem occurs, the cellulose fiber is preferably used in the cellulose fiber 60 to 90% by weight based on the total material of the gap retaining member and the partition member.

The flame retardant uses antimony oxide as a flame retardant filler as a treatment agent to prevent the combustion or spreading of itself when the flame is removed after the flame is ignited. The flame retardant is used in 5 to 10% by weight relative to the blending ratio of the entire material, when used less than 5% by weight, the flame retardancy of the gap retaining member and the partition member is less than 10% by weight In this case, since the workability of the spacing holding member described later is inferior, it is preferable to use the flame retardant in an amount of 5 to 10 wt% based on the total material of the spacing holding member and the partition member.

The filler is an antimicrobial filler composed of zeolite or zirconium phosphate alone or a mixture of two kinds thereof, and dicalcium phosphate dihydrate (CaPO ₄ · 2H), which absorbs moisture between indoor and outdoor air. ₂ O) by using a selected one of the one or more, is used in 3 to 25% by weight based on the blending ratio of the overall material. In this case, if the amount is less than 3% by weight, the water absorption rate is lowered, and the heat exchange efficiency is lowered. If the amount is used in excess of 25% by weight, the processability of the partition member and the spacer is poor. The filler is preferably used in an amount of 3 to 25% by weight based on the total material of the spacer and the partition member.

The wet strength agent refers to a wet strength increasing agent, and the wet strength agent is added to prevent the dissociation in water easily due to the stronger bond strength than hydrogen bonds when wetted by water due to the strength expression due to the chain formation between covalent bonds and fibers. By doing so, it is to enhance the wettability and to improve the freeness, and a water-soluble polyamide epoxy (Polyamade Epoxy) resin having a viscosity of 50 cps is used. The humectant is used in an amount of 2.0 to 5 wt% based on the blending ratio of the entire material. In this case, when the water is used at less than 2.0% by weight, water may fall out, that is, the water freeness is poor, and the heat exchange efficiency is lowered. When the water is used in excess of 5% by weight, the processability of the partition member and the space keeping member is improved. Since the falling problem occurs, the wet stiffener is preferably used at 2.0 to 5% by weight based on the total material of the gap maintaining member and the partition member.

Next, looking at the manufacturing of the gap retaining member and the partition member material using the above components,

First, 60 to 90% by weight of the cellulose fiber, 5 to 10% by weight of flame retardant, 3 to 25% by weight of filler (filler), 2.5 to 5% by weight of humectant at 600 rpm for 10 to 30 minutes by mixing mixing .

The mixing time is to consider the uniform mixing of each component, when the stirring is less than 10 minutes at 600rpm, the gap holding member and the partition member material is not homogeneous, the heat exchange and the like is not made well, and also poor workability Occurs. And when it exceeds 30 minutes, since the mixing is already made suitably, further stirring is meaningless.

After thoroughly stirring and mixing the respective components as described above, the mixed mixture is subjected to a beating step of cutting and fibrillating the mixed mixture.

After the beating step, the paper machine is pressed and dried to reduce the water content to 80%, and a heat drying step of drying the water content at 12 to 13% at 70 to 75 ° C. The gap holding member and the partition member material are completed.

The gap retaining member and the partition member manufactured through the manufacturing steps as described above are composed of fibers and functional antimicrobial fillers to facilitate the heat exchange and humidity exchange between the indoor air and the outside air while providing excellent antibacterial properties. The thickness of the member and the partition member is 100 µm. The basis weight is 75 g / m 2 and the freeness is 100 to 124 ml CSF.

The basis weight indicates the weight of paper per unit area, as grasped in the unit (g / m 2), and the use efficiency is high due to the light weight of the heat exchange paper formed by the combination of the gap holding member and the partition member. .

The Yeosu Island (degree of water drainage) was measured by the Canadian Standard Freeness Test (CSF), and 3 g of pulp was added to 100 ml of water at 20 ° C. and dissociated in a dissociator. The dissociated contents were poured into a drain chamber of a freeness tester, and the amount of water from the side orifice at the bottom of the chamber was measured.

Hereinafter, the configuration of the gap maintaining member and the partition member described above will be described in more detail with reference to the accompanying drawings.

First, briefly look at each of the drawings, Figure 1 is a perspective view showing the operation concept of the heat exchanger, Figure 2 is a perspective view showing a conventional heat exchanger, Figure 3 is a perspective view showing a constituent member of a conventional heat exchanger, Figure 4 Is a perspective view of a heat exchange cell component member according to the present invention.

Referring to Figure 1, the room air in the room temperature is discharged to the outside through the heat exchanger, the outdoor air in the hot or cold state is introduced into the room through the heat exchanger to the heat exchange in the heat exchanger can be configured It is showing.

The total heat exchange distributes the indoor air at room temperature and the outdoor air at high or low temperature with the partition member interposed therebetween, so that heat exchange between the indoor and outdoor air is performed through the partition member.

Figure 2 is a perspective view of a conventional heat exchanger, showing a configuration that the heat exchange can be made through the flow in and out of the indoor and outdoor air through the gap maintaining member and the partition member as in the present invention.

Figure 3 shows a conventional heat exchanger constituent member, the constituent member is shown to be composed of a combination of the gap retaining member and the partition member, showing a configuration in which a moisture absorbent is applied to one side of the partition member.

The application of the moisture absorbent is a mixture of 5-10% by weight of a moisture absorbent selected from phosphorus pentoxide, metal hydride, lithium chloride, calcium chloride, calcium carbonate and 90-95% by weight of water, and the surface of the spacer member and the partition member. After applying to dry and finished,

In addition, the impregnation is a mixture of 5 to 10% by weight of the absorbent and 90 to 95% by weight of water after the first impregnation step and dried for 30 to 50 minutes at 25 ~ 35 ℃ conditions, and then went through the second impregnation step After drying at 30 ~ 40 ℃ 1-2 hours to complete.

Figure 4 shows a heat exchanger constituent member according to the present invention according to the present invention, the constituent member is a partition member and a gap holding member.

The membrane retaining member 11 and the partition member 12 are coated or impregnated with a moisture absorbent 21, wherein the gap retaining member 11 in which the moisture absorbent is impregnated is room air in a room temperature state and outdoor air in a high temperature or low temperature state. Creping is performed to form a passage for the movement of the.

Looking at the creping of the gap holding member 11 through FIG. 5, the gap holding member 11 is pressed through a pair of pressing rolls 10 to a high density, and the compressed gap holding member 11 is pressed. ) Is passed through the pair of corrugated rolls 20 again.

The corrugation roll 20 forming the waveform on the gap holding member 11 has a temperature of 100 to 120 ° C., and when the wave roll 20 is less than 100 ° C., the waveform does not form well on the gap holding member 11. When the temperature exceeds 120 ° C, a phenomenon in which the material of the space keeping member 11 is fused to the surface of the corrugation roll 20 occurs, so the corrugation roll is preferably maintained at a temperature of 100 to 120 ° C during creping. Do.

In addition, the corrugated roll 20 has a sawtooth blade shape to form a corrugation in the gap holding member 11, a pair of corrugated roll so that the valley and the floor shape can be formed in the gap holding member (11). This mesh is made to rotate.

After passing through the corrugated roll 20, in order to maintain the waveform shape as it is, one uses a roll without bending, and the other uses a corrugated roll, while the corrugated roll is rotated and the curve is free of The roll-based compaction step is followed by a post-treatment step to keep the waveform shape intact.

The corrugated shape interval maintaining member 11 manufactured by the above process has a valley and a floor continuously formed uniformly, and the vertical length between the valley and the floor is 1.5 to 3 mm, and between the valley and the valley. The distance and the distance between the floor and the floor is characterized in that 3 ~ 5㎜.

If the vertical length is less than 1.5 mm, the flow passage of the air is narrow, so that the transfer is performed at a high speed, so that the heat exchange is not performed well. If the length exceeds 3 mm, the volume of the heat exchange paper is increased. Since there is a problem that the utilization falls, it is preferable to maintain the vertical length between the valleys and the floor formed in the spacing member 11 to 1.5 ~ 3mm.

When the distance between the valleys and the valleys and the floor and the floor is less than 3mm, the speed of the fluid passing through the heat exchanger is faster, so that the heat exchange is difficult to occur, if the thickness exceeds 5mm Since the gap between the members 12 is narrowed so that the heat exchange is not easily performed, the distance between the valleys and the valleys and the distance between the floors and the floors are preferably maintained at 3 to 5 mm.

The spacing holding member 11 is used as the spacing member of the heat exchange paper, and one side of the spacing holding member 11 is crimped to improve air shielding, and has a thickness of 1.0 to 5 mm. It is laminated with the diaphragm member 12 that serves to form a heat exchange paper constituting member. The heat exchange paper is manufactured by stacking a plurality of such heat exchange paper components.

The space maintaining member 11 forms a space such as a tunnel through which the fluid can pass, and the space maintaining member 11 having such a fluid moving space is a fluid of another space maintaining member 11 adjacent up and down. It is arranged to cross at right angles to the movement passage.

The space maintaining member 11 of the heat exchange paper having such a multilayer structure forms a fluid movement space in which each layer intersects at right angles to each other, and one of the fluid movement spaces facing in the same direction discharges the room temperature air of the room to the outside. On the other hand, outdoor hot or cold air is introduced.

Through this fluid movement space, heat exchange is performed. In winter, warm air and moisture in the room are exchanged with cold air to increase the temperature of the air flowing into the room. In summer, cold air and moisture in the room are increased. The heat exchange with the hot air outside reduces the temperature of the air flowing into the room, thereby improving the energy efficiency of the air conditioners.

As described above, the heat exchanger having a high heat exchange efficiency according to the present invention is a gap retaining member and a partition member, which crepe a material formed by mixing a cellulose fiber, a flame retardant, a filler, and a humectant. It is manufactured by using, and by impregnating or applying a moisture absorbing agent to the gap holding member and the partition member, the heat exchange is better than the conventional heat exchanger, which has the advantage of efficiently utilizing energy.

Claims (5)

The indoor room temperature air and the outdoor high temperature or low temperature air flow through the partition member 12 spaced apart by the space keeping member 11, and the two types of air streams of the indoor and outdoor In a heat exchange paper of a laminated structure in which the total heat exchange is performed through the partition member 12, The gap retaining member 11 and the partition member 12 are 60 to 90% by weight of cellulose fiber, 5 to 10% by weight of flame retardant, 3 to 25% by weight of filler, 2.0 to 5% by weight of damping agent. Excellent heat exchanger, characterized in that made of a material composed of a mixture of heat exchange paper. 2. The spacer member 11 and the partition member 12 have a thickness of 1.0 to 5 mm, a basis weight of 75 g / m 2, and a degree of freedom of 100 to 124 ml CSF (Canadian Standard Freeness). Heat exchange paper with excellent heat exchange. The heat exchange paper according to claim 1, wherein the space keeping member (11) and the partition member (12) are coated or impregnated with calcium carbonate, which is an absorbent (21). The flame retardant is antimony oxide, a flame retardant filler, and the filler is an antimicrobial filler and dicalcium phosphate (Dicalcium phosphate dihydrate, CaHPO ₄ .2H ₂ O), which is a single or a mixture of two types selected from zeolite or zirconium phosphate. Any one or more selected from among, the wet strength agent is a heat exchange paper excellent in heat exchange, characterized in that the polyamide epoxy (Polyamade Epoxy) resin having a viscosity of 50cps. According to any one of claims 1 to 3, wherein the spacer 11 is 60 to 90% by weight of cellulose fiber (cellulose fiber), 5 to 10% by weight of flame retardant (filler) 3 to 25% by weight, After pressing the material composed of a mixture of 2.0-5% by weight of the wet steel to a high density using a pair of pressing rolls 10, a pair of corrugated rolls 20 maintaining a temperature of 100 to 120 ° C is It is made of a corrugated shape having a valley and the floor through the passage, the vertical length between the valley and the floor is 1.5 to 3mm, the length between the valley and the valley and between the floor and the floor is 3 to 5mm Heat exchanger with excellent heat exchange.

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