JPH0366595B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in heat exchange devices used in rotary air conditioning ventilation fans and the like.

Conventional configurations and their problems Conventional gas-to-gas heat exchange methods can be roughly divided into heat storage rotary systems that utilize heat storage in the elements that make up the rotor, and heat exchange systems that utilize heat storage through partition plates. There are two static types. Since the heat storage rotary type has a small rotor heat storage capacity, it usually requires a rotor rotation speed of about 15 revolutions/minute. Therefore, there is a drawback that sliding noise is likely to occur due to rotation.

On the other hand, in a stationary type, sensible heat exchange is performed only by the heat conduction mechanism in the partition plate, so the heat exchange efficiency is generally low.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a heat storage/transmission rotary heat exchanger which is more efficient than the conventional heat exchanger, requires fewer rotations than the conventional heat storage rotary type, and has low sliding noise.

Structure of the Invention A cylindrical rotor in which a plurality of non-moisture permeable and non-hygroscopic partition walls are stacked circumferentially at intervals, and a primary airflow and a secondary airflow are formed to pass alternately between these layers. , and an air passage switching section provided at one or both of the front and rear air passage entrances and exits of the inner cylinder of the rotor, and by rotating the rotor, the primary airflow and the secondary airflow are periodically exchanged. This is a heat exchange method that repeatedly passes through each layer between the partition walls. By adopting this method, the sensible heat stored on the element surface is not transferred to other airflow sides only by the rotation of the rotor, but a considerable portion of it is transferred. Since heat can be transferred to the other airflow side by heat conduction in the partition wall, the heat storage capacity of the rotor will not be saturated even if the rotational speed of the rotor is slowed down. Therefore, compared to the conventional rotary heat exchange method, the rotation speed can be lowered.
Sliding noise can be reduced. Furthermore, in the heat exchange method with this configuration, compared to the conventional static heat exchange method, a heat storage mechanism is added to the heat exchange mechanism, so it is possible to considerably increase efficiency by selecting the rotation speed of the rotor.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing a partial schematic appearance of a cylindrical rotor according to an embodiment for realizing the heat exchange system of the present invention, and related gas inflow and outflow paths. In the figure, 1 is a cylindrical rotor, and 2 is an inner cylindrical portion with an air passage switching section as will be explained later. 3 is a separator that separates both air flows. In the case of the rotor 1 having this structure, airflow entering the rotor 1 from one side of the separator 3 exits the rotor 1 from the same side of the separator 3.

As shown in FIG. 2, this rotor 1 includes a first element 4 having a passage passing through in the axial direction of the cylinder;
A second element 5 having a passage communicating between two openings of the inner cylindrical part through which airflow enters and exits in a radial direction perpendicular to this is laminated on each other in the circumferential direction via a partition wall 6. There is.

FIG. 3 shows an example of elements constituting such a rotor 1, in which a pair of basic elements 7 and 8 are stacked alternately to constitute the rotor 1. In this case, the basic elements 7 and 8 are integrally vacuum molded from hard vinyl chloride. The air passage in the basic element 7 penetrates in the axial direction of the cylinder, and the air passage in the basic element 8 enters from one of the inlets on the inner cylinder side and exits from the other outlet on the inner cylinder side. There is.

FIG. 4 shows another embodiment of the basic elements constituting the rotor 1. In FIG. In this case, the partition wall 6 of the basic element 9
Although the spacing between the air passages varies in the radial direction, the air passage spacing in the basic element 10 is constant in the radial direction, so that the resistance of the air passages in the basic element 10 is smaller than that in the basic element 8.

FIG. 5 is a schematic cross-sectional view of the heat exchanger of this embodiment using such a cylindrical rotor 1, and schematically shows the flow of air within the heat exchanger.
In the figure, numerals 11 and 12 are separators that separate the air paths of both air flows entering the rotor 1. Reference numerals 13 and 14 are air passage switching parts provided at the entrance and exit of the inner cylinder side, which basically has the structure as shown in Figure 6.
It corresponds to between x ¹ and x ² . In the figure, the air path switching plate 15 that separates the air paths of both airflows between x ¹ and x ² is rotated 180 degrees, so the airflows on both sides of the air path switching board 15 are rotated at this part so that the air paths switch with each other. It's getting old. In such a structure, the parts that rotate around the cylinder axis during heat exchange are rotor 1 and rotor 1.
The separators 11 and 12 and the air passage switching parts 13 and 14 are fixed and do not move, except for the partition part 16 which is integrally constructed with the partition part 16.

The heat exchange between the two air streams is not only performed through the partition wall 6 between the first element 4 and the second element 5 in FIG. 2, but also due to the rotation of the rotor 1, for example, As shown in the figure, on the upper surface of the rotor 1, airflow B flows through the first element 4 and airflow A flows through the second element 5, but on the lower surface, airflow A flows through the first element 4, and airflow A flows through the first element 4. By repeatedly replacing each other with the airflow B in the second element 5, sensible heat stored in the element is transferred to the other airflow, thereby performing heat exchange.

The advantage of this method compared to the conventional heat storage rotation type is that the sensible heat transferred from the high-temperature side airflow to the element surface is not only transferred to the rotor rotation, but also transferred to the first element 4 and the second element 5. High efficiency can be obtained because a considerable portion of it can be transferred through the partition wall 6 between them. Furthermore, the heat storage capacity of the element does not reach saturation even when the rotor 1 is stationary due to sensible heat transfer through the partition wall 6, so the rotational speed of the rotor can be lowered compared to the conventional rotary type. The optimal rotation speed for conventional heat storage rotary systems is around 15 revolutions per minute, but experimental results show that the optimal rotation speed for the new system is around several revolutions per minute. This is the reason why the new system produces less sliding noise due to rotation than the conventional rotary system. This method also provides more efficient data than the conventional stationary plate method. This is thought to be because the sensible heat exchange mechanism in the stationary plate is only conduction, but in the new system it relies on both conduction and heat storage mechanisms.

FIG. 7 is a diagram showing a schematic appearance of a cylindrical rotor according to another embodiment for realizing the heat exchange method of the present invention and related gas inflow and outflow paths. In this embodiment, as shown in FIG. 8, the rotor 17 includes a first element 18 having an opening 23 on one end side 23 in the cylinder axis direction and an opening 24 on the inner cylinder side near the other end; a second element 19 having an opening 26 at the other end 25 in the cylinder axis direction and at the inner cylinder side opposite thereto;
are stacked on each other in the circumferential direction with partition walls 20 in between. Figure 9 shows the rotor 17 in this case.
This is an example of the elements constituting the basic element 2.
The rotor 17 is constructed by stacking pairs of rotors 1 and 22 alternately. The basic elements 21 and 22 in this case are integrally molded from hard vinyl chloride, as in the previous case. In a rotor in which such basic elements 21 and 22 are laminated, the direction of the internal air current is changed by 90 degrees, and both air paths have the same air path resistance.

FIG. 10 is a schematic cross-sectional view of a heat exchanger using the rotor 17 of this example, which schematically shows the flow of air within the heat exchanger. Even in a case like this example, the heat exchange mechanism is the same as the heat exchange mechanism in the case of the air passage of the rotor 1 described above.

Figure 11 uses the heat exchanger shown in Figure 5, and the air volume is 2.
This data shows the sensible heat exchange efficiency between airflows at 35°C and 25°C at m ³ /min by varying the rotational speed of the rotor.

For comparison, FIG. 12 shows similar experimental data in the case of a conventional heat storage rotary type, in which the elements have a structure in which corrugated aluminum plates are scattered in the shape of a rotor. As can be seen from these data, it can be seen that the new system achieves higher heat exchange efficiency than the conventional heat storage rotary type even at lower rotational speeds.

Effects of the Invention In the heat exchange method of the present invention as described above, the heat exchange efficiency can be higher than that of the conventional method. In addition, since the number of rotations of the rotor can be lower than that of conventional heat storage rotation type, it has features such as being able to reduce frictional noise caused by sliding due to rotation. Due to these features, an air conditioner using the heat exchanger of the present invention contributes to greater energy savings and comfort. In addition, since there is a hollow part in the present invention, without using the outer periphery,
A heat exchange airflow can flow between the end face of the cylinder and the hollow part, and the installation area is small. In addition, since the effective area for heat exchange is small in the central part of the cylinder, even if this part is removed, the heat exchange function will not be impaired compared to a cylinder having the same external shape.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a partial schematic appearance of a cylindrical rotor according to an embodiment of the present invention for realizing the heat exchange method of the present invention, and the related gas inflow and outflow paths, and FIG. 2 is a diagram showing a partial outline of the rotor. 3 is a diagram showing the basic elements constituting the rotor, FIG. 4 is a diagram showing another embodiment of the basic element, and FIG. 5 is a diagram showing the present embodiment using the cylindrical rotor as described above. FIG. 6 is a schematic cross-sectional view of the heat exchanger of the example, FIG. 6 is a schematic diagram of the main part of FIG. 5, and FIG. 8 is a partial detailed view of the rotor shown in FIG. 7; FIG. 9 is a diagram showing the configuration of basic elements constituting such a rotor; FIG. 10 is a schematic cross-sectional view of a heat exchanger using the rotor shown in FIG. 7, and FIGS. 11 and 12 are diagrams showing the heat exchange efficiency of an embodiment of the present invention and a conventional embodiment, respectively. . 4, 5... Element, 6... Partition wall, 7, 8...
... Basic element, 11, 12 ... Separator, 13,
14... Air path switching section, 15... Air path switching board, 16
...Partition section.

Claims (1)

[Claims] 1 A hollow cylinder is formed by alternately stacking first and second elements with heat storage properties through non-moisture permeable, non-hygroscopic and heat conductive partition walls, and one of the elements is used as a primary air flow passage, and the other element is used as a primary airflow passage. A cylindrical heat exchanger is formed using the element as a secondary airflow passage, an airflow passage switching part is provided at at least one end of a hollow part of the cylindrical heat exchanger, and the cylindrical heat exchanger is rotated. The heat exchange device is characterized in that the passages for the primary airflow and the secondary airflow are periodically switched.