JPH0248773Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is a heat exchanger installed in an air conditioning ventilation fan that exchanges heat between outdoor air and indoor air discharged outside and then sucks it into the room. In particular, the present invention relates to improvements in laminated heat exchangers.

<Prior Art> As this type of air conditioning ventilation fan, there is one constructed as shown in FIG. 6, for example.

That is, an air conditioning ventilation fan 1 that is attached to a wall that separates indoors and outdoors is provided with an indoor air exhaust passage 2 and an outdoor air intake passage 3 that intersect with each other in the main body case. A heat exchanger 4 is provided that indirectly exchanges heat with outdoor air and also has a dehumidifying function.

This heat exchanger 4 is a laminated heat exchanger, for example, as shown in FIG. Indoor air exhaust passages 2 and outdoor air intake passages 3 are alternately formed by stacking a large number of heat exchangers 5 which are arranged in parallel in parallel to further divide the layered passage space to form independent narrow passages. is forming.

Note that 6 and 7 are installed at the indoor ends of both passages 2 and 3, respectively, to actively direct indoor air to the outside as shown by the dotted line arrow in the figure, and outdoor air to the room as shown by the solid line arrow in the figure. These are an exhaust fan and an intake fan that blow air.

Such an air conditioning ventilation fan 1 discharges indoor air to the outdoors to remove pollutants such as CO ₂ , CO, dust, moisture, etc. from the indoor air, and at the same time exchanges heat with the exhausted indoor air and then returns the indoor air to the indoor air. Perform air conditioning ventilation operation to discharge air.

<Problems to be Solved by the Invention> By the way, in such an air conditioning ventilation fan 1, especially in a cold region, there is a risk that the condensation generated inside the heat exchanger 5 will freeze, leading to a decrease in heat exchange efficiency.

For this reason, it is better to arrange the heat exchanger 5 in a counter-flow type rather than in a so-called cross-flow type. That is, when the air flow direction of each of the indoor air exhaust passage 2 and the outdoor air intake passage 3 is a cross flow type, the air supply inlet side and the outlet side of the outdoor air intake passage 3 in the indoor air exhaust passage 2 are Since there is a large temperature difference, the condensed water on the inlet side, which is at a low temperature, is likely to freeze. On the other hand, if the air flow directions in both passages 2 and 3 are counter-flow type,
This is because there is no unevenness in temperature within the indoor air exhaust passage 2 of this type, so when looking at the exhaust flow passage as a whole, freezing of condensed water is less likely to occur compared to the above-mentioned cross-flow type.

However, in the conventional heat exchanger 4 formed by stacking a plurality of heat exchangers 5 as shown in FIG. 7 above, the partition walls 5a of adjacent heat exchangers 5 are Although there is a cross-flow type in which the partitions are stacked alternately orthogonally, there is no counter-flow type in which the partition walls 5a are stacked in parallel.

The present invention was developed by focusing on the conventional situation, and by devising the structure of the inlet and outlet of the heat medium, it is possible to create a counter-flow system using a commercially available heat exchanger like the conventional one described above. The purpose of the present invention is to provide a laminated heat exchanger that is easily manufactured.

<Means for Solving the Problems> For this reason, the present invention has a plurality of heat exchangers in which a pair of partition plates is partitioned by a plurality of parallel partition walls. Each heat exchanger are stacked so that the partition walls are parallel to each other and the inlet portions and outlet portions open in opposite directions alternately, and the end face of the laminate facing the inlet portion is the direction in which the partition walls extend. The heat medium is allowed to flow in from both sides of one end face perpendicular to the partition wall, and the heat medium is allowed to flow out from both end faces that are opposite to each other in the extending direction of the partition wall and are the end face where the outlet portion opens.

<Function> In such a configuration, the heat medium flowing from both sides of one end surface perpendicular to the extending direction of the partition wall of the laminate enters the heat exchanger from the inlet and flows in the extending direction of the partition wall. It flows out from the opposing end faces through the outlet section.

Therefore, the heat carriers flow oppositely and exchange heat with each other.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

In the figure, a plurality of heat exchangers 12 are formed by partitioning a pair of partition plates 10 with a plurality of parallel partition walls 11.
(Commercially available cardboard plastic) One end in the extending direction of each partition wall 11 is cut diagonally at an angle of about 45 degrees with respect to the partition wall 11 to be opened as an inlet 13 for the heat medium, and the other The end portion is cut at right angles to the extending direction of the partition wall 11 and opened as an outlet portion 14 for the heat medium. The heat exchangers 12 are stacked so that the partition walls 11 are parallel to each other and the inlet portions 13 and outlet portions 14 are opened in alternate directions. The heat medium is introduced from both sides of the end face of the laminate 15 facing the inlet part 13 and perpendicular to the extending direction of the partition wall 11, and the heat medium flows into the outlet part 14.
The heating medium flows out from both end faces which are open and are opposite to each other in the direction in which the partition wall 11 extends.

Here, above the end of the heat exchanger 12 which is opened as the outlet part 14, a partition wall 16 having approximately the same height as the heat exchanger 12 is provided so as to function as a partition wall when the heat exchangers 12 are stacked. (See Figures 3 and 4). Further, the heat exchanger 12 located at the top is not provided with this partition wall 16 (see FIG. 2).

The stacked heat exchangers 12 are bonded together, for example, with an adhesive, and are disposed within the heat exchanger body as a heat exchanger unit.

In a heat exchanger having such a configuration, outdoor air (shown by solid lines in FIG. 5) as a heat medium and indoor air are respectively introduced from both sides of one end surface perpendicular to the extending direction of the partition wall 11 of the heat exchanger unit. Air (indicated by dotted lines in FIG. 5) enters and flows into the stacked heat exchangers 12 from the inlet portion 13, and flows out through the outlet portion 14 from both end faces facing each other in the extending direction of the partition wall 11.

Therefore, the outdoor air and the indoor air as heat carriers flow oppositely and exchange heat with each other.

Next, the action will be explained.

Now, if the intake fan 7 and the exhaust fan 6 are kept in the ON state as shown in FIG. 6, and air flows are generated in the outdoor air intake passage 3 and the indoor air exhaust passage 2, respectively, and the ventilation operation is continued, the heating will start. During operation, fresh outdoor air exchanges heat with indoor air in a counterflow type heat exchanger and is discharged into the room where it is appropriately heated.

During this heat exchange, the high-temperature and humid indoor air is discharged while exchanging heat with the relatively low-temperature outdoor air that flows approximately parallel from the exhaust inlet side to the outlet side of the indoor air exhaust passage 2 in the heat exchanger 12. . That is, the indoor air is discharged while all the air flowing through any of the independent narrow passages separated by the partition wall 11 in the exhaust passage 2 undergoes heat exchange in substantially the same way.

For this reason, like the cross-flow type heat exchanger 4, among the independent passages formed separately at both ends of the indoor air exhaust passage 2, one end located on the air supply inlet side of the outdoor air intake passage 3 The passage at the end does not become colder than the passage at the other end, and heat is exchanged under almost the same conditions as any independent passage, and all the independent passages have an average temperature distribution, so condensation water does not It is difficult to freeze, making it advantageous for use in cold regions.

In this way, by simply cutting one end of the commercially available heat exchanger 12 at a predetermined angle and erecting the partition wall 16 at the other end, it is possible to easily separate the air between the odd and even layers. A counterflow heat exchanger unit for exchanging heat can be manufactured economically, and a heat exchanger in which condensed water is less likely to freeze can be provided.

Moreover, by changing the number of stages of the heat exchanger 12, it is possible to correspond to various ventilation airflow rates and easily adjust the increase or decrease in heat exchange efficiency. Because there are
The direction of the intake and exhaust ports can be easily changed by simply changing the direction of the stack.

Furthermore, according to this configuration, one end of each of the heat exchangers 12 in the direction in which the partition wall 11 extends is cut diagonally at an angle of about 45 degrees to the direction to open as the inlet part 13. This has the advantage that circulating air can be uniformly distributed and materials can be used effectively. Note that the cutting angle is not limited to the above-mentioned approximately 45° angle. Furthermore, the cut surface does not have to be completely straight.

Further, although the adjacent heat exchangers 12 are bonded to each other with an adhesive or the like, the present invention is not limited to this, and the heat exchangers 12 may be stacked and stored so as to be fitted into a case of a predetermined size.

<Effects of the invention> As explained above, according to the invention, a counterflow stacked heat exchanger can be easily and inexpensively formed using a commercially available heat exchanger, thereby preventing freezing of condensed water. We can provide heat exchangers that are difficult to use. In particular, one end of the extending direction of the partition wall of each heat exchanger is cut diagonally with respect to the direction to open as an inlet, so that the circulating air can be uniformly distributed and the material can be used effectively. It has the advantage of being usable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of a heat exchanger unit according to the present invention, Figs. 2 to 4 are plan views of the heat exchanger which are the main parts of Fig. 1, and Fig. 5 is the same as above. An explanatory diagram of air flow in the embodiment, FIG. 6 is a configuration diagram showing an example of an air conditioning heat exchanger, and FIG. 7 is a perspective view showing a conventional example of a heat exchanger. DESCRIPTION OF SYMBOLS 10... Partition plate, 11... Partition wall, 12... Heat exchanger, 13... Inlet part, 14... Outlet part, 15... Laminated body.

Claims (1)

[Scope of utility model registration request] A pair of partition plates are separated by a plurality of parallel partition walls, and one end of each of the partition walls in the extending direction is cut obliquely to the direction to open an opening as an inlet for the heat medium. At the same time, the other end is cut at right angles to the extending direction of the partition wall to open as an outlet section for the heat medium, and each heat exchanger is arranged so that the partition walls are parallel to each other and the inlet section and the outlet section are opened. The heating medium is laminated so that the sections are alternately opened in opposite directions, and the heating medium is introduced from both sides of the end surface facing the inlet section of the laminate, which is perpendicular to the extending direction of the partition wall. 1. A heat exchanger for an air conditioning ventilation fan, characterized in that the heat exchanger is configured to cause a heat medium to flow out from both end faces facing each other in the extending direction of a partition wall, the end faces having an opening.