JPS62261892A - Heat exchanger - Google Patents

Abstract

PURPOSE:To provide a heat exchanger capable of effecting both of total heat exchange and sensible heat exchange by one unit by a method wherein a heat exchanging element consists of a first unit element which consists of a material with hydrophilic nature and faces a first ventilating passageway, and a second unit element which consists of a material with moisture permeability and water repellency and faces a second ventilating passageway. CONSTITUTION:In case the temperature of exhaust gas, passing through a first ventilating passageway 9 of a heat exchanger 6, is higher than the same of suction gas, passing through the second ventilating passageway 10 of the heat exchanger 6, the exhaust gas A in the ventilating passageway 9 is cooled and moisture in the exhaust gas A is absorbed by a hydrophilic first unit element 15 while the absorbed moisture is transferred to the suction gas B in the ventilating passageway 10 through a second unit element 16 provided with fine holes and, thus, total heat exchange may be effected. The heat exchanger 6 is pivoted by 90 deg.C through the operation of a lever 12 to locate the ventilating passageway 9 of the heat exchanger 6 at the passageway of the suction gas B and locate the passageway 10 at the passageways of the exhaust gas A. The exhaust gas A in the passageway 10 is cooled and moisture in the exhaust gas A is dewed on the surface of the second unit element 16 repellent to water. The dew water does not pass through the fine holes of the second unit element 16 and sensible heat exchange may be effected.

Description

Detailed Description of the Invention [Invention 1] (Industrial Application Field) The present invention uses a plurality of heat exchange elements to form a partition between a first air passage and a second air passage. Regarding heat exchangers.

(Prior Art) Conventionally, a heat exchanger used for an air conditioning ventilation fan, for example, has a heat exchange element laminated in several layers, and has a ventilation passage through which air (intake) is drawn from the outdoors into the room and a ventilation path through which the air is discharged from the room to the outside. Air passages through which air (exhaust air) passes are alternately formed, and heat is exchanged between the intake air and the exhaust air via a heat exchange element as they pass through each ventilation passage. There are two types of heat exchangers: one is a total heat exchange type that uses moisture-permeable processed paper for the heat exchange element, and the other is a conventional type that uses moisture-permeable plastic sheet for the heat exchange element. There is also a natural exchange type. Among these, the total heat exchange type exchanges both heat and moisture between intake air and exhaust air, whereas the sensible heat exchange type exchanges heat. Only the exchange of

(Problems to be Solved by the Invention) However, in the conventional heat exchangers mentioned above, the total heat exchange type can only perform residual heat exchange, and the sensible heat exchange type can only perform sensible heat exchange. It was something that could not be done.

Therefore, an object of the present invention is to provide a heat exchanger capable of performing both residual heat exchange and explicit heat exchange with a single unit.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a heat exchanger having a plurality of heat exchange elements and partitioning a first air passage and a second air passage. The heat exchange element includes a first unit element made of a material having hydrophilic properties and facing the first air passage, and a second unit element made of a material having moisture permeability and water repellency and facing the second air passage. It is composed of unit elements.

(Function) In the above, for example, when high-temperature gas is passed through the first ventilation passage and lower-temperature gas is passed through the second ventilation passage, there is a gap between the respective gases via the heat exchange element. At the same time, the moisture contained in the gas passing through the first air passage is absorbed by the first unit element which has hydrophilicity, and the moisture is transferred to the second unit element which has moisture permeability. The gas passes through the unit element and passes through the second ventilation path, where total heat exchange takes place. On the other hand, if high temperature gas is passed through the second ventilation path and lower temperature gas is passed through the first ventilation path,
Heat exchange is performed between the respective gases via the heat exchange element in the same manner as described in -I-, but the moisture contained in the high temperature gas passing through the second air passage makes the heat exchange element water repellent. The second 1
Dew condenses on the 11th element and becomes water droplets, and the moisture does not move toward the first air passage, whereby sensible heat exchange takes place.

(Example) An example in which the present invention is applied to an air conditioning ventilation fan will be described below with reference to the drawings.

First, in Figures 3 to 5, 1 is an outer box of an air conditioning ventilation fan, and the inside is divided into left and right sides by a partition wall 2. On the left side, there is an exhaust fan 3 in the front and an intake fan 3 in the rear. A double-shaft motor 5 for driving the exhaust fan 3 and intake fan 4 is disposed in the center, and a heat exchanger 6 is disposed on the right side. As shown in FIG. 6, this heat exchanger 6 is constructed by disposing corrugated plates 8 on rectangular plate-shaped heat exchange cords 7'' so that the directions of the corrugated plates 8 are alternately changed by 90 degrees. The first ventilation passage 9 and the second ventilation passage 1 are laminated to form a so-called cross-flow configuration.
0 and 0 are alternately partitioned by heat exchange elements 7. The heat exchanger 6 has a shaft support hole 11 formed in the center of both the left and right side surfaces thereof, and a lever 12 is provided on the right side surface. As shown in Fig. 4, it is rotatably supported by a support shaft 13.13 which is inside the outer case 1 and inserted through the support holes 11, 11, and it is supported externally from a lever hole 14 of the outer case 1. By operating the lever 12 that protrudes in this case, the device can be rotated 90 degrees around a support shaft 13°13.

Here, the heat exchange element 7 of the foot heat exchanger 6 will be described in detail with reference to FIG. This Figure 1 is in this case the i
(In order to avoid clutter, the corrugated plate 8 between the heat exchange elements 7 and 7 is omitted, and the first air passage 9 and the second air passage 1
The orientation direction of 0 is shown in the same state. That is, 5. The heat exchange element 7 is made of a first unit cord 15 made of a double-layered paper treated with a hydrophilic polymer containing a hydrophilic material, in this case a moisture absorbent 1, and a moisture permeable and water repellent material. In this case, the second unit element 16 made of a porous tetrafluoroethylene material
In each heat exchange element 7, the first unit element 15 is connected to the first air passage 9, and the second unit element 15 is connected to the first air passage 9.
unit cords 16 are arranged so as to face the second air passages 10, respectively.

In the air conditioning ventilation fan equipped with the heat exchanger 6 having such a configuration, when the exhaust fan 3 and the intake fan 4 are driven by the motor 5, the indoor air is is the outer box 1 as shown by arrow A in Figure 3.
The air is drawn into the exhaust fan 3 through the intake port 17 at the top, passes through one ventilation path (in this case, the first ventilation path 9) of the heat exchanger 6, and is discharged outdoors from the exhaust port 18 at the rear of the outer box 1. (see FIG. 5), and at the same time, due to the blowing action of the intake fan 4, outdoor air is sucked into the intake fan 4 from the intake port 19 at the rear of the outer box 1 as shown by arrow B in FIG. , from here to the other air passage of the heat exchanger 6 (second air passage 1
0) and is discharged into the room from the exhaust port 20 at the front of the outer box 1 (see FIG. 5). At this time, the air (exhaust air) discharged from the room to the outside and the air (intake) drawn into the room from the outdoors are heat exchanged in the heat exchanger 6 via the heat exchange cords 7.

Here, in the ventilation operation described in -1-, as shown in FIG. (indicated by arrow B), heat exchange is performed between the exhaust air A and the intake air B via the heat exchange element 7, and the exhaust air A
The exhaust air A in the first air passage 9 is cooled by the temperature difference between the air A and the intake air B, and the moisture in the air A is absorbed by the hydrophilic first unit cord 15, and the moisture is finely absorbed. The air is transferred to the intake A side in the second air passage 10 through the second unit cord 16 having a hole, whereby both heat and moisture exchange, that is, residual heat exchange takes place.

On the other hand, when the exhaust air A and the intake air B are in the same relationship as described above, the heat exchanger 6 is operated by operating the lever 12 of the heat exchanger 6 to
The first ventilation passage 9 of the heat exchanger 6 is positioned in the intake air B passage, and the second ventilation passage 10 is positioned in the exhaust air A passage. In this case, as shown in FIG. At the same time, due to the temperature difference between the exhaust air A and the intake air B, the second
The exhaust air A in the ventilation path 10 is cooled, and the moisture in the exhaust air A condenses on the surface of the water-repellent second unit element 16. The condensed water does not pass through the fine holes of the second unit element 16. Therefore, there is no moisture transfer from the exhaust air A to the intake air B side, and only heat is exchanged, that is, sensible heat exchange is performed. Furthermore, the second
Although not shown, the condensed water formed on the surface of the unit element 16 is discharged to the outside of the room.

According to the above embodiment, the heat exchange element 7 of the heat exchanger 6 is made of a hydrophilic material and faces the first air passage 9.
The second unit element 16 is made of a moisture-permeable and water-repellent material and faces the second air passage 10, so that one heat exchanger 6 can perform residual heat exchange and overt heat exchange. You can do both. Therefore, in an air conditioning ventilation fan using such a heat exchanger 6, for example, when the humidity of the indoor air is high, overt heat exchange is performed, and conversely, when the humidity is low, residual heat exchange is performed. It is possible to maintain the humidity of indoor air as appropriately as possible.

Note that the present invention is not limited to the embodiments described above and shown in the drawings; for example, the second jltl of the heat exchange element 7
As the nest 16, a porous material such as polypropylene can be used as long as it has moisture permeability and water repellency.

Alternatively, it may be a plastic sheet with fine holes, and the first ventilation path 9 and the second ventilation path 10 may be
Instead of rotating the heat exchanger 6, the switching between exhaust and intake may be done by changing the direction of the fan.Furthermore, if the equipment uses a heat exchanger, it may be possible to switch between air conditioning and ventilation. The present invention can be modified and implemented as appropriate without departing from the scope of the invention, such as being applicable to other applications.

[Effects of the Invention] As is clear from the above description, the present invention provides a heat exchanger that includes heat exchange elements in stages and partitions a first air passage and a second air passage. a first unit element in which the element is made of a hydrophilic material and serves as a first air passage;
Since it is composed of a second Qj element made of a material having moisture permeability and water repellency and facing the second air passage, one heat exchanger can perform both residual heat exchange and overt heat exchange. It has this excellent effect.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are cross-sectional views of essential parts to show different operating states, FIG. 3 is a schematic perspective view of the air conditioning ventilation fan, and FIG. 4 is the same. Cross section, 5th
The figure is a longitudinal sectional view of the same, and FIG. 6 is a perspective view of the heat exchanger 11 body. In the drawing, 6 is a heat exchanger, 7 is a heat exchange element, 9 is a first air passage, 10 is a second air passage, 15 is a first unit element, 1
6 is a second unit element. , Applicant Tot Co., Ltd. Toshiba Most 1 Figure IA2 Figure '@3 Figure 4Il! l

Claims (1)

[Claims] 1. In a device that has a plurality of heat exchange elements to form a partition between a first air passage and a second air passage, the heat exchange element is made of a hydrophilic material and is provided in the first air passage. A heat exchanger comprising: a first unit element facing the second unit element; and a second unit element made of a material having moisture permeability and water repellency and facing the second air passage.