JPS62186192A - Rotary heat exchanger - Google Patents

Abstract

PURPOSE:To enlarge heat exchanging area, improve heat exchanging efficiency and miniaturize a heat exchanger by a method wherein air is sucked from the side of rotating center of respective flow paths for primary and secondary air and is ventilated to the outer peripheral side by a centrifugal ventilating action resulting from the rotation of the main body of the heat exchanger. CONSTITUTION:The main body 9 of a heat exchanger is provided with a multitude of square partitioning plates 10 and a multitude of square corrugate plates 11 while primary flow paths 12 and secondary flow paths 13, extending from the rotating center A side toward the outer peripheral side so as to be intersected, are formed alternately between respective partitioning plates 10. When a motor 7 is started, the main body 9 of the heat exchanger is rotated, air in the primary flow paths 12 and the secondary flow paths 13 is sent from the side of the rotary center A toward the outer peripheral side by a centrifugal ventilating action, indoor air is sucked into an indoor side suction chamber 21 and is discharged from an outdoor side discharging port 5 to the outside of a room through an outdoor side discharging chamber 24. Simultaneously, atmosphere is sucked from an outdoor side suction port 6 into an outdoor side suction chamber 23 and is discharged from an indoor side discharging port 4 into the room through an indoor side discharging chamber 22. Accordingly, heat exchanging area is enlarged remarkably and heat exchanging efficiency can be improved remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a rotary heat exchanger that has both a heat exchange function and an air blowing function by rotating the heat exchanger body.

[Technical Background of the Invention] A conventional general rotary/rotary heat exchanger uses a double-blade fan with blades protruding radially on both sides of a main heat exchange plate, and heats the inside of the fan casing. It was constructed so that it was divided into two chambers by a replacement main plate. In this case, air on both sides of the fan casing is sucked into the fan casing from the rotation center side by the centrifugal blowing action accompanying the rotation of the fan, and in the process of being blown toward the outer periphery along both sides of the main heat exchanger plate, both air Heat is exchanged between the two via a heat exchange main plate.

[Problems with the Background Art] However, in the above configuration, heat exchange is performed using a single heat exchange main plate, so in order to increase the heat exchange area and increase the amount of heat exchange, the diameter of the heat exchange main plate must be increased. However, there was a disadvantage that the heat exchanger became larger. Moreover, since both air flows in parallel from the center to the outer periphery with the heat exchanger main plate sandwiched between them, the temperature difference between them is large at the center and the amount of heat exchanged increases, but the more air flows toward the outer periphery, the more heat is exchanged. Since the temperature of the high-temperature side air decreases and the temperature of the low-temperature side air increases, the temperature difference between the two becomes extremely small on the outer peripheral side, and the amount of heat exchanged also decreases. For this reason, it is not possible to perform sufficient heat exchange through the entire area of the heat exchange main plate.
The drawback was that the heat exchange efficiency was inherently low.

[Object of the Invention] The present invention has been made in consideration of the above-mentioned circumstances, and therefore, its purpose is to expand the heat exchange area and improve the heat exchange efficiency, as well as to reduce the overall size. The purpose of the present invention is to provide a rotary heat exchanger that can be used in various ways.

[Summary of the Invention] The present invention has a plurality of partition walls formed radially around a rotation center, and a primary flow that extends between each of these partition walls in a direction that extends from the rotation center side toward the outer circumferential side and intersects with each other. A heat exchanger body is constructed by alternately forming passages and secondary passages, and air is sucked in from the rotation center side of each of the primary and secondary passages by centrifugal blowing action as the heat exchanger body rotates. The heat exchanger is configured so that heat is exchanged between the two airs via the respective partition walls by blowing air to the outer circumferential side, thereby expanding the heat exchange area while providing the heat exchanger body with a blowing function. This is how it was done.

[Embodiments of the Invention] Hereinafter, a first embodiment in which the present invention is applied to an air conditioning ventilation fan will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a flat box-shaped main body case attached to a chamber wall 2. An indoor suction port 3 is formed in the center of the front surface of the main body case 1, and an indoor discharge port 4 is formed in the front side of the lower surface. ing. In addition, the main case 1
A cylindrical outdoor outlet 5 and an outdoor inlet 6 are provided at one corner of the upper part and at a lower part of the rear surface of the chamber, respectively, and these holes 2a and 2b are formed in the chamber wall 2. It is inserted in and communicated with the outdoors. Reference numeral 7 indicates a motor mounted and fixed at the center of the back inside the main body case 1. Reference numeral 8 indicates a central partition plate fixed to the rotating shaft of the motor 7. This is formed in the shape of a deep dish to cover the front part of the motor 7, and its outer periphery A flange portion 8a formed in the main body case 1 is located approximately at the center between the front and rear parts of the main body case 1. Reference numeral 9 denotes a heat exchanger main body fixedly attached to the flange portion 8a of the central partition plate 8, which includes a large number of square partition walls 10 (see FIG. 3) and a large number of square corrugated plates 11. As shown in FIG. 2, these partition plates 10 and corrugated plates 11 are alternately laminated in the circumferential direction around the center of rotation A, so that the entire structure has a substantially donut shape. however,
Each corrugated sheet 11 is stacked so that the direction of the wave is alternately changed by 90', and the crest and trough portions of the wave of each corrugated sheet 11 are the same as those of the partition wall plate 1.
The wave height of each corrugated plate 11 is formed to be lower on the rotation center A side so that the corrugated plate 11 uniformly abuts on the rotation center A side. Thereby, between each partition plate 10, a primary flow path 1 extending from the rotation center A side toward the outer peripheral side and in a direction intersecting with each other is formed.
2 and secondary flow paths 13 are formed alternately. The heat exchanger main body 9 configured as described above has four parts on the inner and outer peripheries and on both the front and rear sides.
Reinforcement rings 14 to 17 are applied to the two ridge corners for reinforcement.

By attaching and fixing the reinforcing ring 14 on the inner peripheral side to the flange portion 8a of the central partition plate 8, the heat exchanger main body 9 is rotationally driven by the motor 7.

On the other hand, annular rings 15, 16.1 on the outer circumferential side and on both front and rear sides
7 are formed with annular protrusions 15a, 16a, 17a, respectively, and these protrusions 15a, 16a, 17a correspond to annular grooves 18, 18 formed on the inner surface of the main body case 1 with a sealing material. 19. The indoor air intake chamber 21 and the secondary flow path 13 are inserted into the main body case 1 and thereby communicate the indoor air intake port 3 and the rotation center A side of the primary flow path 12 in the main body case 1.
an indoor exhaust chamber 22 that communicates the outer circumferential side of the indoor discharge port 4 with the indoor discharge port 4; an outdoor intake chamber 23 that communicates the outdoor intake port 6 with the rotation center A side of the secondary flow path 13; An outdoor exhaust chamber 24 is defined, which communicates the outer circumferential side of the exhaust chamber with an outdoor discharge port 25 .

Next, the action of the phosphoric acid will be explained. When the motor 7 is started to perform ventilation operation, the heat exchanger main body 9 rotates. Due to the centrifugal blowing action accompanying this rotation, the air in the secondary flow path 12 and the secondary flow path 13 are both sent from the rotation center A side to the outer circumferential side, so indoor air flows from the indoor intake port 3. It is inhaled into the indoor air intake chamber 21, and each -
The air is blown from the rotation center A side of the next flow path 12 to the outer peripheral side, passes through the outdoor exhaust chamber 24, and is discharged outdoors from the outdoor outlet 5. At the same time, outside air is sucked into the outdoor intake chamber 23 from the outdoor intake port 6, and is further blown from the rotation center A side of each secondary flow path 13 to the outer circumferential side, and passes through the indoor exhaust chamber 22 to the indoor side. It is discharged into the room from the discharge port 4. In this way, a flow of indoor air is formed in each secondary flow path 12, while
A flow of outside air is formed in each secondary flow path 13, whereby heat is exchanged between indoor air and outside air via each partition plate 10, and the heat-exchanged outside air is supplied into the room at the same time. ,
Indoor air is exhausted outdoors, thereby ventilating the room.

According to this embodiment as described above, heat is exchanged between the indoor air and the outside air through a large number of partition plates 10 provided radially around the rotation center A, so that the conventional single plate described above is used. Compared to a configuration in which heat is exchanged via a main heat exchange plate, the heat exchange area (the integrated value of the area of each partition plate 10) can be significantly expanded. Moreover, since the primary flow path 12 through which the indoor air passes and the secondary flow path 13 through which the outside air passes cross each other at substantially right angles, the flows of the indoor air and the outside air are cross-flowing. Therefore, a sufficient temperature difference between indoor air and outside air can be ensured over the entire area of each partition plate 10, and each partition plate l
Heat exchange can be performed evenly in the entire area of O, and together with the expansion of the double heat exchange area, a significant improvement in heat exchange efficiency can be achieved. Furthermore, since the heat exchanger main body 9 itself has a blowing function, there is no need for a fan for blowing air, and it goes without saying that the air conditioning ventilation fan itself can be made smaller accordingly.

Next, a second embodiment in which the present invention is applied to a dehumidifying circulation type dryer will be explained with reference to FIG. That is, a circular casing 27 is provided at the rear of the drum 26 within the outer box 25, and a heat exchanger main body 28 having the same configuration as the first embodiment is disposed within the casing 27. However, this heat exchanger body 28
The intersection angle between the primary flow path 29 and the secondary flow path 30 is not 90°, so that the heat exchanger body 28 has a flatter shape than that of the first embodiment. The heat exchanger main body 28 is rotatably supported by a shaft 31 on the back surface of the drum 26 via a pulley part 32 and a central partition plate 33, and is driven to rotate together with the drum 26 by a motor 34 located in the upper part of the outer box 25. .

On the other hand, the inside of the casing 27 is divided by the heat exchanger body 28 into four chambers: a hot air suction chamber 35, a hot air discharge chamber 36, an outside air suction chamber 37, and an outside air discharge chamber 38. is communicated with the rotation center side of the primary flow path 29 through the hot air suction chamber 35, and the outer peripheral side of the primary flow path 29 is communicated with the front surface inside the drum 26 via the hot air discharge chamber 36 and the circulation duct 4o. There is. Further, the outside air intake port 41 at the center of the back surface of the casing 27 is communicated with the rotation center side of the secondary flow path 3o through the outside air intake chamber 37, and the outer peripheral side of the secondary flow path 30 is connected to the outside air discharge chamber 38 and the exhaust duct 42. It is connected to the outside of the aircraft via. A heater 43 is provided on the outlet side of the circulation duct 40, and an outside air intake hole 44 is formed in the back plate of the outer box 25.

Next, the operation of this embodiment will be explained. During the drying operation, the motor 34 rotates the drum 26 and the heat exchanger body 28 as well. Due to the centrifugal blowing action based on the rotation of the heat exchanger main body 28, the air inside the drum 26 is sucked into the hot air suction chamber 35 through the intake hole 39, and is further blown from the rotation center side of the primary flow path 29 to the outer circumferential side. , is returned into the drum 26 through the hot air discharge chamber 36 and the circulation duct 40. At the same time, outside air is sucked into the outside air suction chamber 37 through the outside air intake hole 44 and the outside air suction hole 41 in this order, and is further blown from the rotation center side of the secondary flow path 30 to the outer circumferential side of the outside air discharge chamber 38 and the outside air suction hole 41. It is discharged outside the machine through the exhaust duct 42. At this time, while the air from the drum 26 and the outside air pass through each flow path 29, 30, heat is exchanged through the partition plate, the air from the drum 26 is dehumidified, and the dehumidified air is reheated by the heater 43. It is returned to the drum 26 while being removed.

In the case of the second embodiment as well, since heat exchange is performed through a large number of partition plates 10, the heat exchange efficiency is high, and the dehumidifying effect of the heat exchanger body 28 can be enhanced. 28 In turn, it becomes possible to downsize the dryer.

Furthermore, a third embodiment in which the present invention is applied to an exhaust heat recovery type dryer will be described with reference to FIG. That is, the difference from the third embodiment is that the warm air discharge chamber 36 is communicated with the exhaust duct 42 and the outside air discharge chamber 38 is communicated with the exhaust duct 40.

In such a third embodiment, the air from the drum 26 is dehumidified by heat exchange with outside air in the primary flow path 29, and is discharged to the outside of the machine through the exhaust duct 42. On the other hand, the outside air is heated in the secondary flow path 30 by heat exchange with the exhaust gas, and is supplied into the drum 26 through the circulation duct 40 while being heated by the heater 43 . In this case, the recovery rate of exhaust heat can be increased by improving the heat exchange efficiency, and the effect of dehumidifying the exhaust gas can also be improved.

In each of the above embodiments, the corrugated plate 11 and the partition plate 10 are formed as separate parts, but for example, the corrugated plate 11 and the partition plate 1
0 may be formed integrally with each other, and the corrugated plates may have other shapes, such as a triangular wave shape, for example.

In addition, the present invention can be widely applied not only to ventilation fans and dryers for one-week use as described in the embodiments described in (-), but also to other devices equipped with heat exchangers.

[Effects of the Invention] As is clear from the above description, the present invention has a large number of partition walls formed radially around the center of rotation, and between each of these partition walls, there are partition walls facing from the center of rotation to the outer circumferential side. A heat exchanger body is constructed by alternately forming primary flow passages and secondary flow passages extending in directions that intersect with each other, and air is transferred to each of the primary and secondary passages by centrifugal blowing action accompanying the rotation of the heat exchanger body. Since the structure is configured such that heat is exchanged between both air through the partition walls by drawing in air from the rotation center side of the flow path and blowing it toward the outer circumferential side, the heat exchange area can be expanded, and both air It is possible to change the flow into a cross flow, which is advantageous in terms of heat exchange efficiency, and to improve the overall heat exchange efficiency. Moreover, by improving the heat exchange efficiency, the overall size can be reduced. A rotary heat exchanger that exhibits excellent effects can be provided.

[Brief explanation of drawings]

1 to 3 show a first embodiment in which the present invention is applied to an air conditioning ventilation fan, and FIG. 1 is an overall longitudinal sectional side view;
Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a perspective view of the corrugated plate and the partition plate, and Fig. 4 is a second view of the dryer in which the present invention is applied to a circulating dehumidification type dryer. FIG. 5 is a longitudinal sectional side view of the entire embodiment, and is a view corresponding to FIG. 4 showing a third embodiment in which the present invention is applied to an exhaust heat recovery type dryer. In the drawing, 9 is a heat exchanger main body, 10 is a partition plate (partition part),
11 is a corrugated plate, 12 is a primary flow path, 13 is a secondary flow path, 28 is a heat exchanger main body, 29 is a primary flow path, and 30 is a secondary flow path.

Claims (1)

[Claims] 1. A large number of partition wall portions are formed radially around the rotation center, and between each of these partition wall portions, a primary flow path and a secondary flow path are provided which extend from the rotation center side toward the outer circumferential side and in a direction that intersects with each other. They are formed alternately to form a heat exchanger body, and air is sucked in from the rotation center side of each of the primary and secondary channels and blown to the outer circumferential side by centrifugal blowing action as the heat exchanger body rotates. A rotary heat exchanger characterized in that the heat exchanger is configured such that heat is exchanged between both air through the partition wall portions.