JPH0241155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluid moving device that moves fluid such as air using ion wind caused by corona discharge.

In general, devices that move fluids such as air using ion winds caused by corona discharge are known as
There are some such as those described in No. 23147.
This type of device basically consists of electrode plates 1, which are parallel flat plates, arranged in parallel or radially (first
The figure shows only parallel. ), and ionized wires 2 are arranged between each electrode plate 1 at a position in front of the plane connecting the tips of the electrode plates 1, and these electrode plates 1 and ionized wires 2 are connected to a DC high voltage power source, respectively. It is connected to the positive and negative sides of 3. Therefore, when a DC high voltage is applied to the electrode plate 1 and the ionized wire 2 from the DC high voltage power supply 3, corona discharge occurs between the electrode plate 1 and the ionized wire 2,
An ion wind (ion flow) is generated from the ionized wire 2 toward the electrode plate 1. Due to this ion wind, the fluid around the ionization line 2 flows to the right in the figure through the fluid passage between the electrode plates 1.

By the way, fluid movement devices that use ion wind have the advantage of being able to move fluid noiselessly and with high efficiency (low power) due to the characteristics of the ion wind. This method has the disadvantage that it cannot be applied to equipment that requires high static pressure, such as air blowers for containers and the like. That is, in the conventional fluid moving device, as shown in FIG. 2, the cross-sectional shape of the electrode plate 1 was a parallel flat plate, so the fluid flow 5 induced by the ion flow 4 became a flow that licked the surface of the electrode plate. Although the overall flow was from left to right, there was a reverse flow in the center, and the usable static pressure was extremely small, so we could hardly expect anything.

The present invention has been made based on the above-mentioned circumstances, and its object is to provide a high static pressure fluid moving device that can be used as a blower device such as a heat exchanger.

In order to achieve the above object, the present invention connects to one pole of a DC high-voltage power supply, and connects electrode plates having an airfoil shape or a streamlined cross section with a thickness in the center in parallel, in a radial manner, or in a cylindrical manner. A fluid passageway having a throat is formed between the two electrodes, and an ionization wire or an ionization electrode connected to the other pole of the DC high voltage power source is disposed in the fluid passageway upstream of the throat. It is characterized by the fact that

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a schematic configuration diagram of a fluid moving device showing an embodiment of the present invention, in which the same or corresponding parts as in FIG. 1 are given the same reference numerals. As shown in the figure, the electrode plate 1 of this device has a cross-sectional shape with a thickness in the center, and is formed into a so-called airfoil shape. The electrode plates 1 are arranged in parallel at predetermined intervals to form a diffuser-like fluid passage having a throat with a minimum passage cross section between each electrode. Each electrode plate 1 is connected to a DC high voltage power source 3.
is connected to the negative side, which is one pole of the

On the other hand, the ionization wires 2 of this device are arranged in the fluid passages upstream from the throat, and are connected to the positive side of the DC high voltage power source 3, which is the opposite pole to the electrode plate 1. Note that the electrode plate 1 may be connected to the positive side of the DC high voltage power source 3, and the ionized wire 2 may be connected to the negative side of the DC high voltage power source 3. Further, the electrode plate 1 is made of a conductive member such as aluminum, and the ionization line 2 is made of an elongated metal member such as tungsten.

Next, the operation of this embodiment in the above configuration will be explained with reference to FIG. 4. FIG. 4 is a diagram showing the flow of fluid according to this embodiment. As described above, when a DC high voltage is applied to the electrode plate 1 and the ionization wire 2 from the DC high voltage power supply 3, corona discharge occurs between the electrodes of the electrode plate 1 and the ionization wire 2, and the ionization wire 2 is connected to the electrode plate 1. An ion wind (ion current) is generated towards the Here, as shown in FIG.
The fluid flow 5 induced by the flow is prevented from backflowing because a throat with the minimum cross section of the fluid passage is formed in the center of the fluid passage.
The flow becomes smooth along the curved surface of the electrode plate 1,
Air blowing effect increases. In addition, since the exit side of the fluid passage has a diffuser shape that gradually expands, the kinetic energy of the high-speed airflow obtained at the entrance side of the fluid passage can be effectively recovered as static pressure, resulting in effective static pressure. It can take a large amount of pressure and has a highly efficient air blowing function.

Next, the present embodiment will be explained in comparison with the conventional example with reference to FIGS. 5 and 6. Fig. 5 is a diagram showing the relationship between air flow rate and static pressure when the electrode plate is a flat plate or an airfoil. This indicates the case where the form is the form. Moreover, curves 53 and 54 shown by dotted lines show two cases, one in which the external ventilation resistance is small and the other in which it is large. When the external ventilation resistance is relatively small as shown by the curve 53, the rate of decrease in the air flow rate when the electrode plate 1 is a flat plate is relatively small as shown by the intersection of the curves 51 and 53. is large, curves 51 and 5
As shown by the intersection point 4, there is a noticeable decrease in the amount of air blown. On the other hand, when the electrode plate 1 is airfoil-shaped, the rate of decrease in the air flow rate is curve 52 in any case.
It is relatively small as shown by the intersection of , 53 and 54. Furthermore, when the electrode plate 1 is a flat plate and an airfoil-shaped electrode plate, there is a considerable difference in the static pressure obtained even if the amount of air blown is the same, and a higher static pressure is obtained when the electrode plate 1 is an airfoil-shaped electrode plate.

Fig. 6 is a diagram showing the relationship between the installation position of the ionizing wire and the air flow rate when the electrode plate is a flat plate or an airfoil type. This shows the case where the plate is airfoil-shaped. Note that with respect to the installation positions of the ionization wires shown on the horizontal axis in the figure, with the tip of the electrode plate as a reference, the position upstream from the tip is shown as positive, and the position in the fluid passage downstream from the tip is shown as negative. As shown in the figure, when the electrode plate 1 is a flat plate, the optimum installation position of the ionization line 2 is located in front of the tip of the electrode plate 1, as shown by a curve 61. On the other hand, when the electrode plate 1 is airfoil-shaped, the optimal installation position of the ionization wire 2 is within the fluid passage downstream from the tip of the electrode plate 1 and upstream from the center of the fluid passage, as shown by the curve 62. Located on the side. Therefore, when the electrode plate 1 is wing-shaped, there is no need to install the ionization wire 2 outside the electrode plate 1, which not only makes the device thinner but also effective in protecting the ionization wire 2.

As described above, in this embodiment, the electrode plates 1 arranged in parallel are shaped like airfoils with a thickness in the center, so that the electrode plates 1 can be used as an air blower for a heat exchanger as shown in FIG. 7. In addition, in FIG. 7, reference numeral 7 is a fin of the heat exchanger, and 6 is a tube. In the above embodiment, the electrode plates 1 are arranged in parallel, but it is also possible to arrange them concentrically in a radial or cylindrical manner.

Further, in the above embodiment, an example was shown in which the electrode plates 1 were arranged in one stage, but as shown in FIG. 8, a structure in which the electrode plates 1 were arranged in multiple stages in the fluid flow direction may be adopted. In this way, as shown in Figure 9, compared to the case of one stage,
Higher static pressure can be obtained. In addition, when the electrode plates 1 are arranged in multiple stages, the ionized wires 2 in the second and subsequent stages cause corona discharge with the electrode plates 1 in the previous stage, and in order to prevent the generation of a reverse ion wind, for example, the 10th stage As shown in the figure, only the right side portion of the electrode plate 1 may be formed of the conductive member 1a, and the left side portion may be formed of the insulating member 1b.

Further, the present invention is not limited to the above embodiment, and a partition plate 8 may be provided behind the electrode plate 1, for example, as shown in FIG. In this way, the flow of fluid coming out of the fluid passage becomes a uniform flow without being influenced by the flow coming out of other fluid passages. Note that the same effect can be obtained even if the electrode plate 1 and the partition plate 8 are formed integrally.

Further, according to the present invention, the cross-sectional shape of the electrode plate 1 may be streamlined with a rounded tip, as shown in FIG. In this way, there is no possibility of inhibiting the generation of ion wind, and a stable ion effect in one direction can be obtained. Note that it goes without saying that the present invention can be practiced even if a needle-shaped ionization electrode is provided in place of the ionization line 2.

As described above, according to the present invention, electrode plates connected to one pole of a DC high-voltage power source and having an airfoil-shaped or streamlined cross section with a thickness in the center are arranged in parallel, radially, or cylindrical. A fluid passage having a throat is formed between the two electrodes, and an ionization wire connected to the other pole of the DC high voltage power source is disposed in the fluid passage upstream of the throat. So,
It is possible to provide a fluid moving device that can be applied as a blower device such as a heat exchanger, has a large amount of air blowing, and can obtain high static pressure.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a conventional fluid transfer device, FIG. 2 is an explanatory diagram showing the flow of fluid by the same device, and FIG. 3 is a schematic configuration diagram of a fluid transfer device showing an embodiment of the present invention. Fig. 4 is an explanatory diagram showing the flow of fluid according to the same embodiment, Fig. 5 is a diagram showing the relationship between the air flow rate and static pressure when the electrode plate is a flat plate and an airfoil type, and Fig. 6
The figure is a diagram showing the relationship between the installation position of the ionization wire and the amount of air blown when the electrode plate is a flat plate or an airfoil, and FIG. Figure 8 is an explanatory diagram showing a modified example in which electrode plates are arranged in multiple stages, Figure 9 is a diagram showing the relationship between the air flow rate and static pressure depending on the number of stages of electrode plates, and Figure 10 is a diagram showing a modification in which electrode plates are arranged in multiple stages. An explanatory diagram showing the configuration of the electrode plate in the case of
FIG. 11 is an explanatory diagram showing an embodiment in which a partition plate for rectification is provided behind the electrode plate, and FIG. 12 is an explanatory diagram showing an embodiment in which the electrode plate is streamlined. 1... Electrode plate, 2... Ionization wire, 3... DC high voltage power supply.

Claims (1)

[Claims] 1 Connected to one pole of a DC high voltage power supply, airfoil-shaped or streamlined electrode plates with a thick center section are arranged in parallel, radially, or cylindrically, and a throat is connected between the two electrodes. 1. A fluid moving device comprising: a fluid passageway having a section, and an ionization wire or an ionization electrode connected to the other pole of a DC high voltage power source arranged in the fluid passageway upstream from the throat section.