JPS5984091A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat exchanging efficiency and reduce sliding sounds by a method wherein a rotor is formed by laminating a plurality of layers of partitioning plates having heat transfer properties and humidity permeating properties into circumferential direction with spaces and the rotor is rotated. CONSTITUTION:The rotor 1 is formed by a method wherein the first elements 4, having paths penetrating into the axial direction of a tube, and the second element 5, having paths communicating two openings of an inner cylindrical tube through which airstream is passing in-and-out into the radial direction thereof which is orthogonal to the axial direction of the first element 4, are laminated through partitioning walls 6 of a material having heat transfer properties and humidity permeating properties. Heat, generated on the surfaces of the element, may be transferred to the other element in accompanied with the absorption or releasing of the accumulated latent heat of the elements and moisture by rotating the cylindrical rotor 1 and exchanging the primary airstream and the secondary airstream periodically, therefore, the rotating speed thereof may be lowered and the sliding sounds may be reduced. The effective moisture absorbing amount into the element is increased, therefore, the heat exchanging efficiency may be increased.

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 configuration and problems There are two conventional total heat exchange systems: a heat storage rotation type that utilizes heat and moisture storage in the rotor, and a stationary transmission type that exchanges total heat through a partition plate. There is. Since the heat storage rotary type has a small rotor heat storage capacity, the rotor usually requires a rotation speed of about 16 revolutions/minute.

Therefore, sliding noise is likely to occur due to rotation.

Furthermore, there is a drawback that the effective amount of moisture adsorption to the element is reduced due to the effects of sensible heat storage in the rotor and heat of adsorption and desorption of moisture.

On the other hand, in the static-permeation type, sensible heat exchange and latent heat exchange are performed only by the heat conduction mechanism in the partition plate and the moisture permeation phenomenon, so the total heat exchange efficiency is generally low.

OBJECT OF THE INVENTION It is an object of the present invention to provide a heat storage transmission rotary heat exchange device which has higher efficiency than conventional heat exchange devices and has the feature of lower sliding noise because the number of revolutions is lower than that of the conventional heat storage rotary type. be.

Structure of the invention A cylindrical rotor is constructed by stacking a plurality of layers of moisture-permeable partitions and cutting plates in the circumferential direction at intervals, and forming a secondary air flow and a secondary air flow to flow alternately between these layers. By rotating this as a component and adopting a total heat exchange method in which the secondary airflow and the secondary airflow are periodically exchanged and passed through each layer between the partition plates, the accumulation in the element is reduced. The heat generated on the surface of the element due to adsorption and desorption of sensible heat and moisture is not transferred to the other side only by the rotation of the rotor, but a certain amount of it can be transferred to the other side by heat conduction in the partition plate. Therefore, compared to conventional rotary total heat exchange equipment, the rotation speed can be lowered and sliding noise can be reduced. Furthermore, since the effective amount of moisture adsorbed to the element increases, the heat exchange efficiency increases. In addition, in this configuration, compared to the conventional static permeation type total heat exchange method, a heat storage and moisture storage mechanism is added to the heat exchange mechanism, so it is possible to further increase efficiency.

Description of examples Embodiments of the present invention will be described below 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,
2 is an inner cylindrical portion with an airflow 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 opening 1 includes a first element 4 having a passage passing through in the axial direction of the cylinder, and two openings 1 in the inner cylindrical part through which air flows in and out in the radial direction perpendicular to the first element 4. It has a structure in which second elements 5 having passages communicating between the parts are laminated on each other in the circumferential direction with partition walls 6 interposed therebetween.

FIG. 3 shows an example of elements constituting such an a-tube 1. Basically, the rotor 1 is constructed by stacking a pair of elements 7 and 8 alternately. In this case, the basic elements 7 and 8 have a structure in which the air flow passage with the moisture absorbent enters through one of the inlets of the inner cylindrical part and exits from the other outlet of the inner cylindrical part on the surface of the kraft paper.

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

FIG. 6 is a schematic cross-sectional view of the heat exchanger of this embodiment when such a cylindrical rotor 1 is used, and schematically shows the flow of air within the heat exchanger.

In the figure, reference numerals 11 and 12 indicate separators that separate the paths of both air flows entering the rotor 1. Although this uses one partition plate 16 whose both ends are twisted by 180° with the central portion thereof as an axis, other configurations may be used.

13.14 is an airflow passage exchange part provided at the entrance and exit of the inner cylindrical airflow passage, which basically has the structure as shown in Figure 6, and corresponds to the area between Xl and X2. .

Partition plate 1 that separates both airflow paths between X1 and X2 in the figure
6 has been rotated 180 degrees, so the partition plate 16
The airflow passages on both sides of the airflow exchange with each other. In such a structure, the only parts that rotate around the cylinder axis during heat exchange are the rotor 1 and the partition part 16 that is integrally constructed with the rotor 1, and the separators 11, 12, the airflow passage exchange part 13. 14 is fixed and does not move.

The heat exchange between the internal air flows not only takes place through the partition wall 6 between the first element 4 and the second element 6 in FIG. 2, but also by the rotation of the rotor 1, for example, As shown, on the upper surface of the rotor 1 in the figure, the first
The airflow B flows through the element 4, and the airflow A flows through the second element 6. However, on the bottom surface, the airflow A flows through the first element 4, and the airflow B flows through the second element 6, and so on. By reversing the exchange, the sensible heat and moisture stored in the element are transferred to the other airflow, resulting in total heat exchange.

Compared to conventional heat storage rotary type total heat exchangers, the advantage of this method is that the adsorption heat associated with adsorption and desorption of moisture on the element is also converted into desorption heat, or the sensible heat in the high-temperature air flow is not only generated by the rotation of the rotor. Since most of the water can be transferred through the partition wall 6 between the first element 4 and the second element 6, the effective amount of moisture adsorbed by the element can be increased and efficiency can be increased. 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 that the rotation speed of the bellows can be lowered compared to the conventional rotary type. The optimal rotation speed for the conventional heat storage rotary type is around 16 revolutions/minute, but experimental results show that the optimal rotation speed for the new system is around 1 revolution/minute. This is the reason why the new system produces less sliding noise due to rotation than the conventional rotary system. Indeed, this method yields more efficient data than the conventional static transmission method. This is thought to be because the total heat exchange mechanism is only conduction and permeation in the static permeation type, but in the new type, a moisture storage cylinder mechanism is added to these.

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 the case of this embodiment, the rotor 17 has a first element 1 having an opening 24 at one end 23 in the sleeve direction and at the inner cylindrical side near the other end, as shown in FIG.
8 and, conversely, a second element 1 having an opening 26 on the other end side 26 in the cylinder axis direction and on the inner cylinder side on the opposite side.
9 are stacked on each other in the circumferential direction with partition walls 20 in between. FIG. 9 shows an embodiment of the elements constituting the rotor 17 in this case, and the rotor 17 is constructed by stacking pairs of basic elements 21 and 22 alternately. The basic elements 21 and 22 in this case are also made of kraft paper coated with LiCl as a moisture absorbent, as in the previous embodiment. In a rotor in which such basic elements 21 and 22 are laminated, the internal airflow changes direction by 900 degrees.
Both passages have the characteristic that the air passage resistance is the same. Since the wind pressure between the solid air flow paths is equal, heat transfer and
Figure 1o is a cross-sectional schematic diagram of a heat exchanger when the rotor 17 of this example is used, and 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 airflow passage of the rotor 1.

Figure 11 uses the heat exchanger shown in Figure 6, and the temperature is 36°'c.

60 inches, 26 degrees (: , 50% air volume 2 n?/mi
This is data obtained by changing the rotational speed of the rotor to determine the heat exchange efficiency between n internal airflows. In the figure, A is the total heat exchange efficiency, B is the sensible heat exchange efficiency, and C is the latent heat exchange efficiency. As can be seen from this data, by changing the rotation speed of the rotor, it is possible to change the proportion of sensible heat exchange efficiency and latent heat exchange efficiency, which has the potential to support more advanced air conditioning. It is shown that. For comparison, FIG. 12 shows similar experimental data in the case of a conventional heat storage rotary type, and the elements have a structure in which corrugated kraft paper is spread in the shape of a rotor. In this case, as shown in the data, even if the rotational speed of the rotor changes, the ratio of sensible heat exchange efficiency and latent heat exchange efficiency to the total heat exchange efficiency will not be as high as the heat storage transmission equation shown in Figure 11. You can see that it doesn't change.

With the heat exchange device of the present invention, the total heat exchange efficiency can be considerably higher than that of the conventional method. Furthermore, by controlling the rotation speed, the ratio between sensible heat exchange efficiency and latent heat conversion efficiency can be maintained without changing. By using the heat exchange device of the present invention having such characteristics in an air conditioner, a large energy saving effect can be expected.

[Brief explanation of the drawing]

FIG. 1 is a partial schematic explanatory view of a cylindrical rotor according to an embodiment of the heat exchange device of the present invention, FIG. 2 is a partial detailed view of FIG. 1, and FIG. FIG. 4 is a partial schematic explanatory diagram of a cylindrical rotor according to another embodiment of the basic structure, FIG. 8 is a partial detailed diagram of the rotor of FIG. 7, and FIG. A perspective view of the basic elements constituting the rotor, FIG. 10 is a schematic cross-sectional view of a heat exchange device according to a different embodiment of the present invention, and FIG. 11 is a heat exchange between both air streams using the heat exchange device of FIG. 6. A diagram showing the efficiency, FIG. 12, is a diagram showing the heat exchange efficiency of the conventional heat storage rotary type for comparison with the data shown in FIG. 1... Rotor, 2... Inner cylindrical part, 3
...Separator, 4,6...Element, 6...1W[,7-10...Basic element, 11.12...Senoku Rator, 13.14・
...Airflow passage exchange section. Name of agent Patent attorney Toshio Nakao and 1 other party 1
Figure 2 s) 3 1 So C1 Figure 4 Figure 7 Section 8 Figure 9 Figure 8110

Claims (1)

[Scope of Claims] (1. Second elements are alternately stacked to form a hollow cylinder, and a partition wall existing between the first and second elements has heat conductivity and moisture permeability. , wherein one element has a primary air flow passage and the other element has a secondary air flow passage, and the blow air flow and secondary air flow passages are periodically exchanged by rotating the cylindrical heat exchanger,
A heat exchange device comprising an airflow passage switching section at at least one end of the hollow section of the cylindrical heat exchanger. (2) The first element has an air flow passage hole in the cylindrical axial direction, and the second element has a plurality of openings in the hollow part, and air flows from one opening to the other opening. The heat exchange device according to claim 1, which allows the passage of the heat exchanger. (3) The first element communicates from one end of the cylindrical heat exchanger to the hollow part via an axial passage, and the second element communicates with the hollow part from the other end of the cylindrical heat exchanger in an axial direction (4). The heat exchange device according to claim 2 or 3, wherein a separator is interposed in the diametrical direction of the heat exchanger to divide the cylindrical heat exchanger and the hollow portion into two. (6) The air flow passage switching section has a shape in which the center line of a stretchable flat plate is aligned with the axis of the cylindrical heat exchanger and both ends are twisted by 1800 degrees. The heat exchange device described in Ninseki.