JPH0331976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a total heat exchange ventilation system that simultaneously takes in and exhausts outdoor air and exhausts indoor air. By using a permeation type total heat exchanger and exchanging intake and exhaust air periodically (that is, passing the intake air and exhaust air alternately in the passage) and performing total heat exchange ventilation, higher efficiency can be achieved. It is an object of the present invention to provide a more convenient total heat exchange air conditioner that has a total heat exchange capability and is maintenance-free.

Conventionally, there is a transmission type total heat exchanger as a total heat exchanger used in air conditioning ventilation fans. This uses paper-like material with moisture permeability and heat permeability as the partition plate of the element, and the intake air flow and exhaust air flow are simultaneously directed in the same direction alternately between each layer partitioned by the partition plate. The total heat exchange efficiency is generally as low as 55 to 60%, and the direction of the airflow in each layer between the partition plates does not change, so the heat is transferred through the partition plates. Dust tends to accumulate at the air inlet of the exchanger, and not only a filter is required, but also cleaning of the heat exchanger inlet is a regular maintenance item. Furthermore, the elements of this type of heat exchanger tend to become clogged, which is a main cause of lowering the heat exchange efficiency and shortening the life of the heat exchanger.

The present invention solves the above-mentioned drawbacks of an air conditioner that uses the above-mentioned conventional static permeation total heat exchanger to perform total heat exchange ventilation by flowing intake and exhaust air in a fixed direction between each layer of a partition plate. be.

The details of the present invention will be explained below based on the drawings showing embodiments. FIG. 1 is a partial external view of a total heat exchanger according to an embodiment of the present invention, in which 1 is a partition plate and 2 is a spacer plate. Partition plate 1 has fireproof paper,
The spacer plate 2 is made of corrugated kraft paper. This kraft paper has moisture and heat storage properties. FIG. 2 shows a cross section of the partition plate 1. As shown in FIG. This partition plate 1 has heat permeability, moisture permeability, heat storage ability, and moisture storage ability. In Figure 2, consider the flow of intake and exhaust air and heat exchange. A feature of this configuration is that air from the indoor side and air from the outdoor side are periodically exchanged on both sides of the partition plate 1.

In addition, in Fig. 2, if the intake and exhaust are exchanged on both sides of the partition plate 1, the direction of flow is reversed.
This direction does not necessarily have to be reversed; for example, the direction of the airflow on the 3 side in FIG. 2 may remain unchanged even after being replaced with the airflow on the 4th side. The outdoor atmosphere in the summer, which is currently hot and humid, is 33℃60%.
When the indoor atmosphere during cooling is set to 26℃50%,
In the case of wind flow in the direction of the arrow in Figure 2, some of the sensible heat and latent heat flowing from the outdoor side to the indoor side are stored in the partition plate 1, while others are stored in the partition plate 1 from the 3rd side to the 4th side. Some of them are discharged from the 4 sides of the partition plate 1, which are exposed to the airflow from the indoor side, to the outdoor side by riding on the airflow from the indoor side. Also, partition plate 1
Similarly, part of the heat of adsorption generated by the adsorption of moisture from the partition plate 1 and the heat of desorption generated by the desorption of moisture from the partition plate 1 (in this case negative due to an endothermic reaction) are also stored.
Alternatively, it moves inside the partition plate 1 in the direction 3→4. When the cycle is switched and the direction of the airflow is reversed, and the airflow on the outdoor side and the airflow on the air side are swapped, the sensible heat and latent heat that had been stored near the surface 3 of the partition plate 1 are transferred to the room. It is discharged to the outside of the room along with the low-temperature airflow from the inside.

The advantage of this method is that by periodically reversing and replacing the airflow from outside and the airflow from inside, the enthalpy brought into the heat exchanger from the outside is discharged back to the outside through the partition plate 1. In addition, a mechanism is added that stores enthalpy in the partition plate 1 and spacing plate 2 and discharges it to the outside when airflow is exchanged on both sides of the partition plate, so the total heat exchange efficiency is dramatically improved compared to conventional methods. The aim is to increase the number of people.

FIG. 3 is a schematic diagram showing this method of measuring heat exchange efficiency, and FIG. 4 shows the results obtained. 5 in the figure is a total heat exchanger, and its size is 150×
Reference numerals 250, 6, and 6' are propeller-type fans, which allow the direction of rotation to be changed between forward and reverse directions. The air volume passing through the total heat exchanger 5 is 2.5 in either direction.
m ³ /min. It has been confirmed from measurement results that when the rotation direction of the fans 6, 6' is reversed, the constant value of 2600 rotations is reached 4 seconds after the cut-off switch is turned on.
Temperature and humidity sensors were set at positions A, B, C, and D, and the changes were recorded on the recorder. The hygrometer used uses changes in the capacitance of tantalum, and responds quickly, reaching 95% of the equilibrium value within a few seconds. Such a test device was set between two adjacent constant temperature and humidity rooms that were adjusted to the indoor and outdoor temperature and humidity conditions, respectively, and the direction of the air flow was periodically reversed in a 30-second cycle. A in FIG. 4 shows the result of determining the change in total heat exchange efficiency in the case where the airflow from the indoors and the airflow from the outdoors are switched. In the diagram
A′ is the average value for 30 seconds. B is the result of using the same total heat exchanger 5 to find the efficiency at equilibrium in the case of the so-called conventional total heat exchange method in which the air flow continues to flow in a fixed direction without reversing the flow direction. It is. As is clear from these results, the air conditioning ventilation method using such a heat storage transmission method has a higher total heat exchange efficiency than the air conditioning ventilation method that uses a conventional transmission total heat exchanger and continues to flow air in a fixed direction. It can be seen that the results are significantly improved.

In the figure, the horizontal axis indicates the elapsed time from the time when the rotational direction of the fans 6, 6' was changed. Figures 5A and 5B are schematic diagrams of an embodiment of an air conditioning ventilation fan manufactured using this method, and Figure 6 is an external view thereof.

However, in this figure, the front panel looper has been removed. In the figure, 12 is a total heat exchanger, 8,
8' is a Sirotsko type fan, actually one motor,
It has a 2-fan structure. 9 is a looper on the front panel. 10 and 10' are shutters that are closed when the vehicle is not in operation. Here, the rotation direction of the fans 8, 8' is always constant, and the periodic exchange of airflow passing through the heat exchanger is performed by swinging the total heat exchanger 12 through 90 degrees. Total heat exchanger 1
2 swing once every 30 seconds as shown by arrow 11 in the figure. The time required for swinging is about 1 second.

The difference between Figures 5A and 5B is that the heat exchanger is rotated 90 degrees. The type of air and the direction of flow in the heat exchanger in each state are shown in Figure 6 A and B.

As described above, in the present invention, sensible heat exchange and latent heat exchange are not only carried out through the partition plates, but also those carried out by the heat storage, moisture storage and heat release, and dehumidification effects of the elements, so that the total heat exchange efficiency can be improved. Compared to the conventional transmission type, it can be made considerably more expensive. In addition, since dust does not adhere to and accumulate at the total heat exchanger inlet where the direction of the primary airflow and secondary airflow are periodically reversed, not only is there no need for a filter, but it is also possible to clean the total heat exchanger inlet surface. Maintenance is also unnecessary. Furthermore, unlike conventional methods, clogging on the surface of the element, which shortens the life of the element, is less likely.

[Brief explanation of the drawing]

Figure 1 is a schematic external view of a total heat exchanger that is a component of an embodiment of the present invention, Figure 2 is a sectional view of the partition plate in Figure 1, and Figure 3 is a total heat exchange efficiency measuring device. FIG. 4 is a characteristic diagram showing the total heat exchange efficiency obtained using the measuring device, FIG. 6A and 6B are air flow diagrams in the same device, and FIG. 7 is a perspective view of the main part of the same device. 1... Partition plate, 2... Spacing plate, 5, 12... Total heat exchanger, 6, 6', 8, 8'... Fan, 9...
Full panel, 10, 10'...shutter.

Claims (1)

[Scope of Claims] 1. A plurality of partition plates stacked at predetermined intervals, a means for alternately passing a primary airflow and a secondary airflow through an air passage formed between the partition plates, and 1. A total heat exchange air conditioner comprising means for periodically exchanging airflow and secondary airflow with each other, and wherein the partition plate has moisture permeability, moisture storage ability, and heat storage ability. 2. The total heat exchange air conditioner according to claim 1, characterized in that a spacer plate is provided between the partition plates, and the spacer plate has a heat storage property and a moisture storage property.