JPS5984092A - Heat exchanger - Google Patents

Abstract

PURPOSE:To increase heat exchanging efficiency and reduce sliding sounds by a method wherein a plurality of partitioning plates, having a non-permeating property for moisture but having moisture absorbing property, are laminated into circumferential direction with spaces to form a rotor and the rotor is rotated. CONSTITUTION:The rotor 1 is formed by laminating first element 4, having paths penetrating into the axial direction of the cylinder, and the second element 5, having paths communicating two openings of an inner cylindrical part, 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, through partitioning walls 6. At least a part of the material constituting the element has the moislture absorbing property while the partitioning wall is made of the material having non-permeating property for the moisture. Heat, generated on the surface of the element, may be transferred to the other element by the heat transfer in the partitioning plate by rotating the rotor 1 and exchanging the primary and secondary airstreams periodically, therefore, the rotating speed may be lowered and the sliding sounds may be reduced. Further, the effective absorbing amount of the moisture into the element is increased, therefore, the heat exchanging efficiency may be increased. The device may be used as a latent heat exchanger by stopping the rotation of the rotor.

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 static IL transmission type that exchanges total heat through a partition plate. . 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. Sliding noise is likely to occur due to this slow 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 transmission 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. Furthermore, both of the above types of total heat exchangers can perform only a single function of total heat exchange.

Purpose of the Invention It has higher efficiency than the conventional one, has the multiple function of being able to be used as a sensible heat exchanger, and has the features of requiring less rotation than the conventional heat storage rotary type and having low sliding noise. The present invention provides a heat storage/transmission rotary heat exchange device.

Structure of the Invention A plurality of layers of non-moisture permeable but hygroscopic partition plates are stacked circumferentially at intervals, and a secondary air flow and a secondary air flow are formed to pass alternately between these layers. A total heat exchange method is adopted in which a cylindrical rotor is used as a component, and by rotating the rotor, the secondary airflow and the secondary airflow are periodically exchanged and passed through each layer between the serving plates. In this way, the sensible heat accumulated in the element and the heat generated on the surface of the element due to adsorption and desorption of moisture are not transferred to the other side only by the rotation of the rotor, but a certain amount of the heat is transferred to the other side by heat conduction in the partition plate. Since the rotation speed can be lowered compared to conventional rotary total heat exchange equipment, the sliding noise can be reduced. However, compared to the conventional static permeation total heat exchange method, this configuration adds a heat storage and moisture storage mechanism to the heat exchange mechanism. By selecting the rotation period of the rotor, it is possible to increase the efficiency.

In addition to these features, the new system can function as a sensible heat exchanger by allowing the rotor to rotate. Tonoto means that a new function is added compared to the conventional total heat exchange method.

Description of examples Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a diagram showing a partial schematic appearance of a cylindrical rotor according to an embodiment of the present invention, and the related gas inflow and outflow routes. 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, the rotor 1 has a first element 4 having a passage penetrating in the sleeve direction, and two openings 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 communicating passages are stacked on each other in the circumferential direction with partition walls 6 interposed therebetween.

FIG. 3 shows an actual example of the elements constituting such a rotor 1. The rotor 1 is constructed by stacking a pair of basic elements 7 and 8 alternately. In this case, the basic elements 7 and 8 are formed by applying colloidal silica as a moisture absorbent to the surface of a molded vinyl chloride plate and drying it. The airflow passage in this basic element 7 penetrates in the sleeve direction,
The passage in the basic element 8 enters from one side of the inner cylinder side and exits from the other side of the inner cylinder side.

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 1o 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 in the heat exchanger. .12 is a separator that separates the iΦ path of both airflows entering the rotor 1.

This means that the central part of one partition plate 15 is the axis and both ends are 18
00 twist is used, but other configurations may be used. 13 and 14 are the air flow passage exchange parts provided at the entrance and exit of the 1/2 J" cylinder ft1ll air flow passage, which basically has the structure as shown in Figure 6, and corresponds to the area between Xj and x2. It is something. Since the partition plate 15 that divides the solid air flow path between x, . In such a structure, the parts that rotate around the cylinder axis during heat exchange are rotor 1 and rotor 1.
The separator 11.12 and the airflow passage switching section 13.14 are fixed, so they do not move.

The heat exchange between the two air streams is the first element in Figure 2]
- Sensible heat exchange is not only carried out through the partition wall 6 between the element 4 and the second element 5, but also due to the rotation of the rotor 1, as shown in FIG. Air flow B flows through element 4, air flow B flows through second element 5, but air flow B flows through element 4, and air flow B flows through element 4.
By repeating the exchange of each other, such as airflow person in the second element 6 and airflow B in the second element 6, the sensible heat and moisture stored in the element are transferred to the other airflow. Heat exchange takes place.

Compared to conventional heat storage rotary total heat exchangers, the advantage of this method is that the heat of adsorption and desorption associated with the adsorption and desorption of moisture on the element, or the sensible heat in the high-temperature air stream, is absorbed only 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 5, the effective amount of water adsorbed by the element can be increased and the efficiency can be increased. Since 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, the rotational speed of the bellows rotor can be lowered compared to the conventional rotary type. The optimum rotation speed for the conventional heat storage rotary type is around 15 revolutions per minute, but according to the experimental results, the optimum rotation speed for the new method is once (before and after the rotation). This is due to the fact that the sliding noise caused by rotation is reduced compared to the conventional static transmission type.This method also provides data on higher efficiency compared to the conventional static transmission type.This is because the sensible heat exchange mechanism is different from the static transmission type. This is thought to be due to the fact that the new method uses both conduction and heat storage mechanisms, whereas the new method uses both conduction and heat storage mechanisms.

FIG. 7 is a diagram showing a schematic appearance of a cylindrical rotor of another embodiment for realizing the heat exchange system of the present invention and the related gas inflow and outflow paths. In the case of this embodiment, as shown in FIG. 8, the rotor 17 has a first element 1'8 having an opening 24ff at one end 23 in the cylinder axis direction and an inner circle near the other end. On the contrary, a second element 19- having an opening 26 on the other end side 25 in the sleeve direction and on the inner circle side on the opposite side is laminated on each other in the circumferential direction with a partition wall 20 interposed therebetween. are doing. 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 formed by applying A11hO3 as a moisture absorbent to the surface of a molded vinyl chloride plate and then drying it. In a rotor in which such basic elements 21 and 22 are laminated, the direction of the internal airflow is changed by 90 degrees, and the path resistance is the same in both reverse paths. Since the wind pressure between the solid air flow passages becomes equal, the heat exchange rate due to heat transfer is improved.

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 in 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 5, and the temperature is 35"C.

eo%, 25°C + 5o% air volume"/u+in is the data obtained by changing the rotation speed of the rotor. In the figure, B is the total heat exchange efficiency, and B is the sensible heat exchange efficiency. , C is the latent heat exchange efficiency.As can be seen from this data, in this system, when the rotation is stopped, it functions as a sensible heat exchanger, and as the rotation speed increases, the humidity exchange efficiency tends to decrease. This shows that this heat exchange method has the potential to support more advanced air conditioning by changing the rotation speed.
For comparison purposes, Figure 2 shows similar experimental data for a conventional heat storage rotary system, in which the elements are made of corrugated kraft paper scattered in the shape of a rotor. In this case, as shown in the data, even if the rotor speed changes, the ratio of sensible heat exchange efficiency and latent heat exchange efficiency to the total heat exchange efficiency does not change as much as in the heat storage transmission method. .

Effects of the Invention As described above, the heat exchange device of the present invention can have a higher total heat exchange efficiency than the conventional method. Further, by stopping the rotation of the rotor, the total heat exchanger can be used as a sensible heat exchanger. However, the ratio between sensible heat exchange efficiency and latent heat exchange efficiency can be changed by controlling the rotation speed. With these characteristics,
An air conditioner using the heat exchange device of the present invention is more suitable for energy saving.

[Brief explanation of drawings]

FIG. 1 is a partial schematic explanatory diagram of a cylindrical rotor according to an embodiment of the heat exchange device of the present invention, FIG. 2 is a partial detailed diagram of FIG. 1, and FIG. 3 is a configuration of the rotor. FIG. 4 is a partial schematic illustration of a cylindrical rotor according to another embodiment of the basic ratio, FIG. 8 is a partial detailed view of the rotor of FIG. 7, and FIG. 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 shows the heat exchange efficiency between both air streams using the heat exchange device of Fig. 6. 12 is a diagram showing the heat exchange efficiency of a conventional heat storage rotary type for comparison with the data shown in FIG. 11. 1... Rotor, 2... Inner cylindrical part, 3
... Separator, 4, 5 ... Element, 6 ... Partition wall, 7-1o ... Basic element, 11, 12 ... Separator , 13.14・
...Airflow passage exchange section. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 Figure 7 Straw 8 Figure Ki 9 Figure 10

Claims (1)

[Claims] (1) First. The second elements are alternately stacked to form a hollow cylinder; The partition wall existing between the second elements is non-moisture permeable, at least a part of the material constituting the element is hygroscopic, one element is a primary airflow passage, and the other element is a secondary airflow passage; By rotating the cylindrical heat exchanger, the passages for the flame flow and the secondary air flow are periodically exchanged, and an air flow passage exchange part is provided at at least one end of the hollow part of the cylindrical heat exchanger. Device. (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 from the other end of the cylindrical heat exchanger with (4) the cylindrical heat exchanger. The heat exchange device according to claim 2 or 3, wherein a separator is interposed in the diametrical direction of the vessel to divide the cylindrical heat exchanger and the hollow portion into two. (6) The air flow passage exchange part 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°. Device.