JP2010043813A - Heat exchanging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanging device capable of preventing contamination while keeping steam permeability, with high heat-exchanging efficiency per volume, and capable of being miniaturized. <P>SOLUTION: The heat exchanging device is composed of an air supply blower for supplying outdoor air into a room, an exhaust blower for exhausting indoor air out of the room, and a heat exchanger for heat-exchanging between the outdoor air supplied to the inside of the room and the indoor air exhausted to the outside of the room. The heat exchanging device is characterized by the heat exchanger which is a humidification membrane module comprising a hollow fiber membrane bundle formed of a plurality of hollow fiber membranes, a case for storing the hollow fiber membranes, a first flow passage through which either the supplied air or the exhaust air passes inside a hollow of the hollow fiber membrane, and a second flow passage through which the other of the supplied air and the exhaust air passes on an outer wall surface side of the hollow fiber membrane. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a heat exchange device.
The present invention also relates to a heat exchange device that can reduce the power consumption of the air conditioner by exchanging the temperature of the air supplied to the air conditioner with the exhaust gas.
Furthermore, the present invention relates to a heat exchange device capable of transferring moisture between outdoor air and room air.

Currently, power saving of various devices is being promoted due to global warming and soaring fuel prices. Air conditioners are devices that are often used in cars and indoors for cooling in summer and heating in winter.
In recent years, the power consumption of this device has been considerably increased, but the power consumption is still large. Especially, the increase of gasoline consumption of automobiles and the increase of household power consumption are particularly problematic in summer. .

In particular, in the prior art of the flow chart shown in FIG. 4, since the outside air is supplied to the air conditioner 400 through the supply air blower 100, the outside air temperature is high during cooling and the outside air temperature is low during heating. A lot of power is required.
Since the power consumption of this air conditioner depends on the difference between the temperature of the air supplied to the air conditioner and the temperature setting inside the car or indoors, it is possible to save power if this difference can be reduced.

  From this point of view, when cooling and heating with an air conditioner, there is a temperature and temperature difference between the inside and outside of the vehicle for automobiles and indoor and outdoor for home use, so a heat exchanger that exchanges temperature and humidity is used. The idea that heat exchange between the air inside and inside the air conditioner through the front stage of the air conditioner makes it possible to supply the air conditioner with air having a smaller temperature difference than simply treating the air outside and outside the car. It was.

And based on such an idea, as shown in FIG. 1, what installed the heat exchanger 3 in the front | former stage of the air conditioner 4 was proposed. (Patent Document 1)
However, this type of conventional product is a heat exchanger in which a flat plate member and a corrugated plate member are combined, but has a problem that the structure is complicated.
Further, since the material of the member is paper, it is difficult to control the hole diameter, and it is difficult to prevent contamination while maintaining water vapor permeability.

JP 2007-285584 A

  The present invention has been made in view of such problems, and provides a heat exchange device that can prevent contamination while maintaining water vapor permeability, has high heat exchange efficiency per volume, and can be downsized. The purpose is to do.

The heat exchange device of the present invention includes an air supply blower for supplying outdoor air to the room, an exhaust blower for exhausting the room air to the outside, the outdoor air supplied to the room, and the room air exhausted to the outside In a heat exchange device comprising a heat exchanger that exchanges heat with
The heat exchanger includes a hollow fiber membrane bundle formed by a plurality of hollow fiber membranes, a case for housing the hollow fiber membrane bundle, and a hollow interior of the hollow fiber membrane, either the air supply or the exhaust. The humidification membrane module includes a first flow path through which the air flows and a second flow path through which either the air supply or the exhaust passes through the outer wall surface of the hollow fiber membrane.

The present invention has the following effects.
According to the heat exchange device of the first aspect of the present invention, contamination can be prevented while maintaining water vapor permeability, heat exchange efficiency per volume is high, and miniaturization is possible.

  In addition, according to the heat exchange device of the second aspect of the present invention, contamination can be prevented while maintaining high heat exchange efficiency.

Furthermore, according to the heat exchange device of the invention described in claim 3, contamination can be prevented while maintaining water vapor permeability.
Furthermore, according to the heat exchange device of the invention of claim 4, high heat exchange efficiency can be maintained.

Furthermore, according to the heat exchange device of the invention described in claim 5, higher heat exchange efficiency can be exhibited.
Furthermore, according to the heat exchanging device of the invention described in claim 6, it is possible to save power in the air conditioner.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
FIG. 1 is a flow diagram to which the heat exchange apparatus of the present invention is applied.
FIG. 2 is another flowchart to which the heat exchange device of the present invention is applied.
FIG. 3 is a cross-sectional view showing the heat exchange device of the present invention.

The heat exchange apparatus of the present invention is used in the mode shown in the flow charts of FIGS.
That is, as shown in FIG. 1, outside air is taken in by an air supply blower 1 and supplied to an air conditioner 4 via a heat exchanger 3 according to the present invention.
Next, the air supplied from the air conditioner 4 to the interior of the car or house is exhausted to the outside by the exhaust blower 2 through the heat exchanger 3.

Further, in the flowchart shown in FIG. 2, a part of the supply air that has passed through the heat exchanger 3 is supplied to the air conditioner 4 via the flow rate adjusting valves 5, 5, and a part thereof is directly in the interior of the car or house. 1 is different from that of the embodiment shown in FIG.
By providing the flow rate adjusting valves 5 and 5, it becomes easy to control the temperature and humidity of the air supplied to the room.

Subsequently, the heat exchanger used for this invention is demonstrated based on FIG.1 and FIG.3.
The heat exchange device according to the present invention includes an air supply blower 1 for supplying outdoor air to the room, an exhaust blower 2 for exhausting the room air to the outside, the outdoor air supplied to the room, and the outside air. And a heat exchanger 3 for exchanging heat with indoor air.
The heat exchanger 3 according to the present invention supplies a hollow fiber membrane bundle 31 formed of a plurality of hollow fiber membranes, a case 32 that accommodates the hollow fiber membrane bundle 31, and a hollow interior of the hollow fiber membrane. The first flow path 33 through which either air or exhaust passes and the second flow path 34 through which either the air supply or exhaust passes through the outer wall surface of the hollow fiber membrane are provided.

The hollow fiber membrane bundle 31 is fixed to the case 5 side by the adhesive layer 5 and partitions the first flow path 33 and the second flow path 34.
In FIG. 3, exhaust from inside and inside the vehicle passes through the second flow path 34 inside the hollow fiber tube of the hollow fiber membrane bundle 31, and the first flow path 33 on the outer peripheral side of the hollow fiber of the hollow fiber membrane bundle 31 passes through the second flow path 34. The air supply is configured to pass.

  As a result, as shown in FIGS. 1 and 2, the present invention requires an exhaust blower 2 for exhausting the interior and interior of the vehicle. However, by flowing this exhaust through the heat exchanger 3, the outside air is discharged. Since the heat exchange is performed and the difference between the outside air temperature and the set temperature in the vehicle and indoors can be reduced, the power of the air conditioner 4 can be reduced as compared with the prior art, and the power can be saved.

The hollow fiber membrane used in the present invention is preferably a gai which appropriately blocks air in a dry atmosphere and sufficiently transmits only heat and water vapor, so that the air permeability has a permeability coefficient of 0.0003 to 2 ml · min ^{−. The} water vapor permeability is preferably 0.1 to 0.3 g · min ⁻¹ · cm ⁻² · MPa ⁻¹ at ¹ · cm ⁻² · 100 kPa ⁻¹ .

  The material of the hollow fiber membrane is preferably polyetherimide / polysulfone or polyphenylsulfone from the viewpoint of price, reliability and durability, and the polyphenylsulfone membrane (Japanese Patent Application Laid-Open No. 2004-290751 The films described in JP-A-2006-255502), polyetherimide film (JP-A-2004-261765), polyetherimide film coated with a hydrophilic polymer (JP-A-2002-2573885), and the like can also be applied.

In order to increase the heat transfer property of the hollow fiber, it is also effective to mix a metal or carbon powder or fiber having excellent heat transfer property into the membrane.
Further, as a humidifier, if the effective inner area of the hollow fiber is small, it does not have sufficient heat exchange capacity, and therefore it is usually desirable that the humidifier is larger than 0.1 m ² .
Next, the present invention will be described based on examples.

<Example 1>
Internal diameter 750 microns, outer diameter 1050 microns PPSU hollow yarn (air permeability ^{0.0003ml · min -1 · cm -2 ·} 100kPa -1, 0.2g · min -1 · cm -2 · MPa as water vapor permeability ^- A heat exchanger (effective inner area of hollow fiber 0.33 m ² ) with an effective length of 140 mm of hollow fibers with a total length of 180 mm was prepared by filling ¹ ) ¹ ) into 13.3 cm ² bodies.
Air at 25 ° C. is introduced at 50 NL / min into the second flow path 34 side (Swp side) that is the inside of the hollow fiber membrane bundle 31 at the same time, and at the same time, the first flow path 33 that is the outer peripheral side of the hollow fiber membrane bundle 31. On the side (Off side), air at 40 ° C. was flowed at 50 NL per minute.
Next, the temperature and pressure at each outlet were measured.
The results are shown in Table 1. The outside temperature decreased from 40 ° C to 29 ° C, and the temperature could be decreased by passing through this heat exchanger.
Further, when a gas in which 0.1 μm particles are dispersed is allowed to flow at a differential pressure of 100 kPag on the second flow path 34 side of the heat exchanger, no permeation of particles is observed on the first flow path 33 side. % Was blocking.

<Example 2>
PPSU hollow fiber with an inner diameter of 125 microns and an outer diameter of 175 microns (air permeability: 0.0003ml ・ min ⁻¹・ cm ⁻²・ 100kPa ⁻¹ , and water vapor permeability of 0.2g ・ min ⁻¹・ cm ⁻²・ MPa ^{− 1)} is a frontage sectional area filled 30000 present in箇体of 13.3 cm ^2, the total length is the effective length of the hollow yarn 180mm was fabricated heat exchanger 140 mm (within the effective area of the hollow fiber 1.64 m ^2).
Air at 25 ° C. is introduced at 60 NL / min into the second flow path 34 side (Swp side) inside the hollow fiber membrane bundle 31 at the same time, and at the same time, the first flow path 33 is located on the outer peripheral side of the hollow fiber membrane bundle 31. On the side (Off side), air at 40 ° C. was flowed at 50 NL per minute.
The temperature and pressure at each outlet were measured.
The results are shown in Table 1. The outside temperature decreased from 40 ° C to 30 ° C, and the temperature could be lowered by passing through this heat exchanger.
Further, when a gas in which 0.1 μm particles are dispersed is allowed to flow at a differential pressure of 100 kPag on the second flow path 34 side of the heat exchanger, no permeation of particles is observed on the first flow path 33 side. % Was blocking.

<Comparative Example 1>
PPSU hollow fiber with an inner diameter of 750 microns and an outer diameter of 1050 microns (air permeability 5ml · min ^-1 · cm ^-2 · 100kPa ^-1 and water vapor permeability 0.3g · min ^-1 · cm ^-2 · MPa ^-1 ) Was packed in a box having an opening cross-sectional area of 13.3 cm ² , and a heat exchanger (effective inner area of the hollow fiber 0.33 m ² ) having a total length of 180 mm and a hollow fiber effective length of 140 mm was produced.
Air at 25 ° C. is introduced at 50 NL / min into the second flow path 34 side (Swp side) that is the inside of the hollow fiber membrane bundle 31 at the same time, and at the same time, the first flow path 33 that is the outer peripheral side of the hollow fiber membrane bundle 31. On the side (Off side), air at 40 ° C. was flowed at 50 NL per minute.
The temperature and pressure at each outlet were measured.
The results are shown in Table 1. The outside temperature decreased from 40 ° C to 34 ° C, and the temperature could be lowered by passing through this heat exchanger.
However, when a gas in which 0.1 μm particles are dispersed is flowed at a differential pressure of 100 kPag on the second flow path 34 side of this heat exchanger, the permeation of particles is observed on the first flow path 33 side, and is blocked. The rate is 30%, and if this heat exchanger is used, there is a possibility that contamination in the exhaust will enter the air conditioner.

<Comparative Example 2>
PPSU hollow fiber with an inner diameter of 750 microns and an outer diameter of 1050 microns (air permeability of 0.00001ml · min ⁻¹ · cm ⁻² · 100kPa ⁻¹ , and water vapor permeability of 0.05g · min ⁻¹ · cm ⁻² · MPa ⁻ A heat exchanger (effective inner area of hollow fiber 0.33 m ² ) with a total length of 180 mm hollow fiber and 140 mm effective length was prepared by filling ¹ ) ¹ ) into a body having an opening cross-sectional area of 13.3 cm ² .
Air at 25 ° C. is introduced at 50 NL / min into the second flow path 34 side (Swp side) that is the inside of the hollow fiber membrane bundle 31 at the same time, and at the same time, the first flow path 33 that is the outer peripheral side of the hollow fiber membrane bundle 31. On the side (Off side), air at 40 ° C. was flowed at 50 NL per minute.
The temperature and pressure at each outlet were measured.
The results are shown in Table 1, but the outside temperature only dropped from 40 ° C to 36 ° C.

<Comparative Example 3>
PPSU hollow fiber with an inner diameter of 750 microns and an outer diameter of 1050 microns (air permeability of 0.0003ml · min ⁻¹ · cm ⁻² · 100kPa ⁻¹ , and water vapor permeability of 0.2g · min ⁻¹ · cm ⁻² · MPa ⁻ A heat exchanger (effective inner area of hollow fiber 0.07 m ² ) with a total length of 180 mm and a hollow fiber of 140 mm was prepared by filling 200 pieces into a 13.3 cm ² body with an opening cross-sectional area of ¹ ).
Air at 25 ° C. is introduced at 50 NL / min into the second flow path 34 side (Swp side) that is the inside of the hollow fiber membrane bundle 31 at the same time, and at the same time, the first flow path 33 that is the outer peripheral side of the hollow fiber membrane bundle 31. On the side (Off side), air at 40 ° C. was flowed at 50 NL per minute.
The temperature and pressure at each outlet were measured.
The results are shown in Table 1, but the outside temperature only dropped from 40 ° C to 38 ° C.

<Table 1>
Air permeability coefficient Water vapor permeability coefficient Hollow fiber effective area (ml ・ min ⁻¹・ cm ^-2・ 100kPa ^-1 ) (g ・ min ^-1・ cm ^-2・ MPa ^-1 ) (m ² )
Example 1 0.0003 0.2 0.33
Example 2 0.0003 0.2 1.64
Comparative Example 1 5 0.2 0.33
Comparative Example 2 0.00001 0.2 0.33
Comparative Example 3 0.0003 0.2 0.07

1st flow path 33 side (Off side) 2nd flow path 34 side (Swp side) Contamination prevention rate
Temperature change Temperature change (%)
IN OUT IN OUT
Example 1 40 29 25 34 100
Example 2 40 30 25 32 100
Comparative Example 1 40 34 25 30 30
Comparative Example 2 40 36 25 27 100
Comparative Example 3 40 38 25 29 100

  Further, the present invention is not limited to the best mode for carrying out the above-described invention, and various other configurations can be adopted without departing from the gist of the present invention.

It is a flowchart with which the heat exchange apparatus of this invention is applied. It is another flowchart with which the heat exchange apparatus of this invention is applied. It is sectional drawing which shows the heat exchange apparatus of this invention. It is a flowchart with which the heat exchange apparatus of a prior art is applied.

Explanation of symbols

1 Air supply blower 2 Exhaust blower 3 Heat exchanger 4 Air conditioner 5 Adhesive layer

Claims (6)

An air supply blower (1) for supplying outdoor air to the room, an exhaust blower (2) for exhausting the room air to the outside, and the outdoor air supplied to the room and the room air exhausted to the outside. In the heat exchange device comprising the heat exchanger (3) for heat exchange,
The heat exchanger (3) includes a hollow fiber membrane bundle (31) formed by a plurality of hollow fiber membranes, a case (32) for housing the hollow fiber membrane bundle (31), and the hollow fiber membranes. A first flow path (33) through which either the air supply or exhaust passes through the hollow interior, and a second flow path (34) through which either the air supply or exhaust passes through the outer wall surface of the hollow fiber membrane. And a humidifying membrane module. The heat exchange apparatus according to claim 1, wherein the hollow fiber membrane has a permeability coefficient as air permeability of 0.0003 to ² ml · min ^-1 · cm ^-2 · 100 kPa ^-1 . The heat exchange apparatus according to claim 1 or 2, wherein the hollow fiber membrane has a permeability coefficient of 0.1 to 0.3 g · min ^-1 · cm ^-2 · MPa ^-1 as water vapor permeability. The heat exchange device according to any one of claims 1 to 3, wherein an effective inner area of the hollow fiber membrane bundle (31) is 0.1 m ² or more.   The heat exchange apparatus according to any one of claims 1 to 4, wherein the hollow fiber membrane includes metal or carbon particles or fibers.   The heat exchange device according to any one of claims 1 to 5, wherein the air supply that has passed through the heat exchanger (3) is provided to an air conditioner (4).

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