Cooling plant for lighting device. RU patent 2513026.

FIELD: heating.

SUBSTANCE: invention relates to cooling systems, in particular, for cooling of lights. A cooling plant (100) is proposed, which comprises a source electrode (102), the first and second electrodes-targets (104, 106), arranged at the distance from the source electrode (102), and a control circuit for control of voltage applied between the source electrode (102) and at least one of the first and second electrodes-targets (104, 106). Voltage is controlled in such a manner that they adjust air flow produced as a result of potential difference between the source electrode (102) and at least one of the first and second electrodes-targets (104, 106), so that their direction changes in turns. With the help of invention one may provide for cooling of a device, having similar or better operating characteristics compared to a regular system with heat release and a fan, but with smaller dimensions and weight, and also with absence of noise.

EFFECT: higher compactness and elimination of noise during work.

15 cl, 4 dwg

THE TECHNICAL FIELD TO WHICH THE INVENTION RELATES

The present invention relates to the installation, providing cooling devices, and specifically to the lighting device containing such a cooling installation. The present invention relates also to the corresponding method.

PRIOR ART

In recent years, has made great progress in improving brightness light emitting diodes (LED). As a result, the LEDs have become bright enough and inexpensive light sources used, for example, in lighting installations, such as lamp with adjustable color. Combining different colored LEDs, you can generate any number of colors, such as white. The lighting system with adjustable color typically created through the use of a number of primary colors, and in one example, there are three main colors: red, green, blue. The color of the generated light is determined by what LEDs are used, as well as by the dilution factor. To generate a "white" should include all three LEDs.

For example, in industrial and consumer products, high power LEDs are used to replace traditional incandescent lamps in such applications as automotive, industrial, systems backlight display and lighting systems of architectural details. However, high power LEDs are suffering from the high thermal loads when used for traditional lighting. Important parameters of LEDs, such as efficiency, service life and color, very sensitive to the temperature of the led, which makes the control key issue for the use of LEDs for lighting, particularly in lighting systems with adjustable color where color management is essential for successful application. Of course, the same is applied to "white" LEDs, such as different types of LEDs with the phosphor coating.

A popular way of ensuring control to reduce the heat load is led mounting on printed circuit Board (PCB) and equipment of the PCB heat sink or allocation of a part of the metal layer PCB for this purpose. This type of cooling unit is often cumbersome, because you want the heat sink was large enough to ensure the necessary cooling of the led. When you add a fan blowing air over the heat sink, you can use the heat sink of a smaller size. However, the fan will consume excess energy and often make unwanted noise in the lighting installation.

In addition, the fans are subject to wear and tear, limiting their service life and reliability. In addition, a large bulky design prevents the creation of beautiful and elegant lighting devices. A more efficient and elegant cooling installation, including the cooling unit with electrostatic transducer flow is disclosed in the publication of US 2007/0002534. The publication is opened Converter flow to the direction of the air flow from the fan to improve heat transfer from the surface of the device is the flow Converter. However, even cooling installation according to the mentioned patent application does not solve the problem of getting rid of bulky fan.

SUMMARY OF THE INVENTION

Therefore, there is a need to improve the cooling of the device and, more specifically, in overcoming, or at least mitigate the problems of prior art regarding bulky cooling components.

According to the aspect of the invention the problem is solved by cooling installation contains an electrode source for generating ions, first and second electrodes target located at a distance from the electrode source, and control scheme to control the voltage applied between the electrode source and at least one of the first and second electrodes-targets, and the voltage is controlled so that the air flow resulting from the difference of potentials between the electrode source and at least one of the first and second electrodes-targets are adjustable to have alternate direction by alternating voltage is applied between the electrode source and the first electrode of the target, and between the electrode the source and the second electrode target respectively.

The General concept of the present invention is based on the fact that can be transported through the air so-called electric ion wind, using cooling installation contains an electrode source and at least the first and second electrodes target hereinafter provided in the course of electrode source. It should be noted that it is possible, and is placed in the scope of the invention, to use more than the first and second electrodes target. Preferably the electrodes are connected to the appropriate terminals voltage source with such power that the electric charge generating air ions, arises from the electrode source. The result electronic discharge are air ions, which has the same polarity as the electrode source, and possibly charged called aerosols, i.e. solid particles or liquid droplets that are present in the air, and these charged particles or droplets from the collision of charged air ions. Air ions are moving rapidly under the influence of an electric field from electrode source to at least one of the first and second electrodes-targets, where they leave their electric charge and be recharged by air molecules. During the movement of air ions are constantly faced with uncharged molecules of air and electric power transmitted to these air molecules that are drawn in such a way in the direction of the electrode source in the side of the electrode to the target, causing the movement of air in the form of the so-called ion wind, through hollow structure.

Through this aspect of the present invention is possible to provide cooling devices, such as lighting devices with similar or better performance than a conventional system with heat sink and fan, but with a smaller size and weight, and with noiseless operation. Thanks to the generation of condensed (focused) air flow near a heat source, such as a light source in lighting device, it could also be possible to reduce the need for heat sinks, fans, thermopaste etc. Preferably electrode source is a corona-forming electrode. Accordingly electronic discharge is corona-generating air ions.

The distance between the electrode source and at least one of the first and second electrodes-targets should be greater distance at which occurs electric breakdown. In a variant of realization of the potential difference between the electrodes of the source, for example corona-forming electrode and at least one of the first and second electrodes target sufficient to ionize molecules in ambient air in the discharge electrode and the resulting flow of air from the electrode source in the direction of the electrode target. Preferably the cooling unit operates at low voltage levels, which increases the possibility of providing a safe and reliable installation.

Perhaps in different ways to place the electrode source and the first and second electrodes target. In one embodiment, the electrodes are placed on the raw element without limitation, introducing, for example, hollow structure with skin. In this case, the electrodes can be placed on the inside of the hollow structure. For example, the electrode source and at least one of the first and second electrodes-targets can be located inside the hollow shell of the structure (for example, in the form of a coating on the inside of the shell). In another variant of realization of the electrode the source and at least one of the first and second electrodes target can instead (or similar) to be placed on the substrate (representing in this case the carrier is enshrined, for example, between the first and second parts of the hollow structure. Preferably electrode source, the first and the second electrode-targets and/or the inner surface of the shell can be covered with precious metal, which will lower the levels and possibly to destroy ozone, which can be formed on the electrode source.

In a variant of implementation of the hollow structure contains the intake section and exhaust section. Hollow structure can also be arranged so that it contains at least one hole with tapered inlet area for the air towards the inside of the hollow structure to ensure a Venturi. The Venturi effect in relation to the present invention will be further discussed below. Preferably hole is located in close contact with the device that need refrigeration, such as the light source.

In a possible variant of implementation of the lighting device side tapered inlet for air in a hollow structure that faces the direction of the outer surface of the hollow structure that can contain reflective element. This reflects the element can be provided in the form of a reflector for the light source illuminating device, for example, when a cone-shaped hole is made in the connection with the source of light. It should be noted that the cone-shaped hole containing reflective element may be provided in any of the discussed above options for the implementation of the cooling installation the invention.

According to another aspect of the invention provides a method of cooling lighting devices containing providing support member, placing on the raw element of the electrode source for generating ions, placing on the raw element of the first and second electrodes-targets, and the first and second electrodes target are located on the distance from the electrode source, voltage control, enclosed between the source and at least one of the first and second electrodes target, and this voltage is controlled so that the air stream created by the potential difference between the electrodes of the source and at least one of the first and second electrodes target, is subject to alternate direction changes due to the alternating voltage is applied between the electrode source and the first electrode of the target, and between the electrode the source and the second electrode target respectively.

In this aspect of the present invention by such and similar to that described above with reference to the first aspect of the invention to provide cooling devices, such as lighting devices with similar or better performance characteristics, but of smaller size and weight, as well as providing the opportunity for quiet operation. With the ability to generate a condensed (focused) air flow near a heat source, such as a light source in lighting device, it could also be possible to reduce the need for heat sinks, fans, thermopaste etc. Additionally this aspect provides the possibility to use different types of load-bearing elements, such as hollow structure with a shell or a substrate, such as printed circuit Board. Of course there are other specific solutions.

Additional characteristics and advantages of the present invention will become apparent in the study included claims and subsequent descriptions. The specialists in the art to understand that different signs of the present invention can be combined to create variants of implementation, different from the described further on, without deviation of the volume of the present invention.

BRIEF DESCRIPTION OF DRAWINGS

Various aspects of the invention, including its specific characteristics and advantages will become more clear from the following detailed description and the accompanying drawings in which:

Figure 1 schematically depicts the conceptual cooling installation the preferred option of the implementation of the present invention;

Figure 2 schematically depicts a cooling installation in another preferred option of the implementation of the present invention;

Figure 3 depicts a schematic of the lighting device containing variant cooling installation, according to the present invention;

Figure 4 schematically depicts different lighting device containing variant cooling installation according to the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

The present invention will now be described more fully below, with reference to the attached drawings, which presents the preferred currently embodiments of the invention. However, this invention can be implemented in many forms and should not be seen as limited set here variants of implementation; rather, these options for presents for thoroughness, completeness and fullness of the messages of the volume of the invention specialists in the art. The same reference items refer to the same elements throughout the text.

Let us turn now to the drawings and, in particular, figure 1 presents a schematic representation of the cooling installation the preferred currently variant of the implementation of the present invention. Figure 1 depicts a separate part of the cooling installation 100 containing electrode source in the form of the discharge electrode 102, first electrode-target 104 and the second electrode-target 106. Advanced cooling installation contains 100 first and second enclosing items 108 and 110, respectively, made with the possibility hang discharge electrode 102 and electrodes target 104, 106 and provide a wrapper for the cooling installation 100. Appropriate fencing elements preferably contain the ends formed for inlet and outlet of the air flow. On fig.1b illustrates the principle of operation of the cooling installation 100 and the direction of the air flow in the cooling system 100 for the application of a potential difference between corona-forming electrode 102 and electrodes target 104, 106. As an example, on fig.1b potential difference ensured between corona-forming electrode 102 and electrode-target 106, whereas the other electrode-target 104 retained essentially the same potential, and corona-forming electrode 102. Accordingly, and as discussed above, the potential difference between corona-forming electrode 102 and electrode-target 106 must be supported whenever possible low, inter alia, for security reasons. However, in one given by way of example, but not limited implementation, the potential difference between corona-forming electrode 102 and electrode-target 106 is at least 7 kV and preferably more than 10 kV, possibly providing air flow around 1-3 m/S. In the same embodiment, the distance between corona-forming electrode 102 and electrode-target 106 can be selected approximately equal to about 7 mm

By providing potential difference will occur electronic discharge the discharge electrode 102, which, in turn, will generate air ions. That is the result of electronic discharge air ions are having the same sign as the discharge electrode 102, and possibly also charged the so-called aerosols, i.e. solid particles or liquid droplets that are present in the air, where these charged particles or droplets from the collision of charged air ions. Air ions quickly, under the action of electric field, moving from the discharge electrode 102 to electrode target 106, where they leave their electric charge and be recharged by air molecules. During the movement of air ions are constantly faced with uncharged molecules of air, and thus the electrical power is transmitted to the air molecules, which are sent from electrode source towards the electrode to the target, thus creating the air flow in the form of ionic wind through the building envelope elements 108, 110. In the end point of the enclosing element 110, nearest to the electrode target 106, will produce the output stream, as shown by the arrow, whereas the incoming stream will exist in the end point of the enclosing element 108, nearest to the other electrode target 104. On figs potential difference changed so that in this case the potential difference applied between corona-forming electrode 102 and the first electrode target 104, causing the air flow in the opposite direction compared to the figure 1. Similarly potential on the second electrode target 106 may remain practically at the same level as on corona-forming electrode 102. Additionally, in order to minimize the possibility of generation of ozone may be appropriate to cover, be sheathed or to make a corona-forming electrode 102 and/or electrodes target 104, 106 of the precious metal, such as gold or silver.

Such a unit may also be provided on the opposite side of the PCB. This ionization can effectively take place on both sides of the PCB. Ionization will only occur in acute, positively charged electrode or emitting electrodes. So the air will move from one hand led to another only for Papariga. The direction of movement of the air changed in the next half-period under consideration as an example the case of high-voltage alternating current generator. Therefore, the change of air flow direction coincides with the frequency of AC.

Accordingly, when the work of the cooling installation 200 during the first period the potential difference will be between the first corona-forming electrode 202 and the first electrode target 206. The principle of operation is similar to the principle described in connection with fig.1b. That is, the air flow will start to flow in the direction from the first discharge electrode 202 to the first electrode target 206. During the second period the potential difference will be made between the second corona-forming electrode 204 and the second electrode target 208, causing the air flow is actually in the opposite direction. Magnified view in the context of the first discharge electrode 202 also presented in figure 2. In enlarged view shows a typical example of the implementation of the first discharge electrode, including four indicators L 1-L 4 length/width to determine the size of the discharge electrode 202. In a non-limiting the embodiment of length L 1 and L 2 can be selected in the range from 1 to 5 mm, while the width L 3 plots the discharge electrode can be supported approximately 0.25 mm, having perhaps typical triangular region at the open end. Additionally, the distance between two different sections of the discharge electrode can be chosen in the range of 1-3 mm The specialists in this field of technology is, however, clear that different values of the width and length can be selected, for example, depending on the potential difference applied between corona-forming electrode and electrode-target. Implementation option, described above, contains only one cooling installation 200, but it is clear that can be built an array of such devices when using only one high-voltage generator.

Figure 3 presents the scheme of lighting devices 300 containing variant cooling installation 200 according to the invention. First figa shows a conceptual common side view of lighting devices 300, inside of which on the PCB can be located cooling installation of 200. Compared to the cooling unit 100, shown in figure 1, the cooling installation 200 on figa also includes two enclosing section 302 and 304, which are made with the possibility to fasten the PCB, for example, by means of latches. Advanced lighting device contains 300 cone-shaped hole 306 in at least one of the enclosing of sections 302, 304. During operation, the cooling installation within 200 lighting devices 300 hole 306 will act as a Venturi nozzle, allowing you to implement the Venturi effect. Under the Venturi effect refers to the pressure of the fluid, such as air pressure, which occurs when an incompressible fluid is passed through a narrowed section of the pipe. Accordingly, the Venturi effect can be deduced from a combination of Bernoulli's principle and the continuity equation. That is, the speed of movement of the air flow through the structure must increase to meet the continuity equation, while the pressure must fall due to conservation of energy: the strengthening of the kinetic energy is achieved by pressure drop or force due to the pressure gradient. Therefore, the air flow in the first direction will cause a pressure drop on both sides of the PCB, causing air will passivates through the hole 306 and possibly an extra hole on the opposite side of lighting devices 300. It's like a shock force jet with the difference that the air flow through the slot is called by the pressure drop on the final plot holes, and not increase the pressure in the inlet section of the hole.

Preferably hole 306 can be located near the led 210, as shown in fig.3b, and can be also covered with a reflective coating, which allows this hole to serve as a reflector for the led 210. On fig.3b also shows the use of holes 308 on the opposite side of lighting devices 300. In addition, the arrows on fig.3b shown alternately changing the direction of movement of air through the illuminating device 300. Like the cooling system in figure 1 the ends of fencing sections 302 and 304 are open for free access of air flow, thus forming an inlet/outlet air. However, may be provided other structures, including, for example, the filter element is located inside the intake/exhaust air holes.

Finally, on figa-4C shows the cross-section, common top view and side view other option for the implementation of lighting devices 400 containing cooling installation according to other variant of the implementation of the present invention. Lighting 400 device additionally contains led 402, fixed under layer (such as copper) 404, located adjacent with led 402, discharge electrode 406 and electrode-target 408, together forming the upper section" lighting unit 400. Advanced lighting 400 device contains many spacers 410, located on the lower section, and located in the middle of the neck 412 (for example, intake/exhaust air hole). The upper and lower sections can be connected with each other by, for example, glue, fusion, latches or other appropriate means.

The principle of operation of lighting devices 400 similar to those applicable to the option exercise, referring to figure 2 and 3. However, the difference is that the lighting device 400 does not use the Venturi effect, and directly causing a cooling effect strike force jets, creating a pressure drop in the inner center of the volume formed by many spacers 410 on the lower section and on top section, through wind corona discharge. In this case, the cold air is sucked through the neck 412, heated by a fixed under the surface of the PCB and blown out radially outwards from the center.

Summing up, it should be said that according to the present invention is possible to provide a cooling installation contains an electrode source, the first and second electrodes target located at a distance from the electrode source, hollow structure in which the shell, and the control scheme to control the voltage applied between the electrode source and at least one of the first and second electrodes target. Voltage controlled so that the air flow generated by potential difference between the electrodes of the source and at least one of the first and second electrodes-targets are adjustable to have alternately changing direction. By means of the invention can provide cooling devices with similar or better performance than a conventional system with heat sink and fan, but of smaller size and weight and no noise.

While the invention has been described with reference to specific illustrative examples of its implementation, many different changes, modifications, etc. may be obvious to a person skilled in the art. For example, cooling under the influence of ions can be applied in large systems with led arrays, such as backlight, led retrofit lamp, led downlight fixtures, etc. In addition, the aforementioned cooling units were, in General, described in relation to the application of a potential difference between corona-forming electrode and electrode-target. The application potential difference can be achieved by using a voltage of either AC or DC. Additional changes to the described variants of implementation can be understood and implemented by experts in the field of technology in practice of the claimed invention on the basis of drawings, descriptions and supporting claims. The claims of the word "contain" does not exclude other elements and stages, the signs in the singular, not plural. One processor or other device is able to perform functions of several of the items listed in the claims. The fact that certain characteristics are described in various mutually dependent claims, does not indicate that the combination of these characteristics cannot be profitably used.

1. Cooling installation comprising: electrode source for generating ions; the first and second electrodes-targets located at a distance from the electrode the source, and the control scheme to control the voltage applied between the electrode source and at least one of the first and second electrodes-targets, and the applied voltage is controlled so that the air flow resulting from the difference of potentials between the electrode source and one of the first and second electrodes-targets are adjustable to have alternately changing voltage via alternating voltage is applied between the electrode source and the first electrode is targeted between the electrode and the source and the second electrode-target.

2. Cooling apparatus according to claim 1, additionally contains a hollow structure with the shell, and the electrode source and the first and second electrodes target are located inside the hollow structure.

3. Cooling plant of any one of claims 1 or 2, in which the electrode source is a corona-forming electrode.

5. Cooling plant of any one of claims 1 or 2, in which the potential difference between the electrodes of the source and at least one of the first and second electrodes target sufficient to ionize molecules in ambient air in the discharge electrode and the subsequent emergence of the air flow from the mentioned electrode electrode to the target.

6. Cooling plant of any one of claims 1 or 2, in which the electrode source and at least one of the first and second electrodes target are located on the substrate.

7. Cooling installation according to paragraph 6, in which a hollow structure contains the first and second sections, and the substrate is fixed between the first and second sections.

8. Cooling plant of any one of claims 1 or 2, in which the electrode source and the first and second electrodes target is covered with noble metal.

9. Cooling installation according to claim 2, in which a hollow structure contains the intake section and exhaust section.

10. Cooling installation according to claim 2, in which a hollow structure contains at least one hole with a conical shape towards the inside of the hollow structure to ensure a Venturi.

11. The lighting device that contains a light source and a cooling installation according to claim 1.

12. The lighting device according to claim 11, in which the light source contains at least one light emitting diode (LED).

13. The lighting device on any of § § 11 or 12, in which a hollow structure contains at least one hole with a conical shape towards the inside of the hollow structure and the internal surface of the cone, coming out of the hollow structure that contains reflective element.

14. Cooling method of lighting devices containing phases in which: provide supporting member; place the electrode source for the generation of aeroions on the host element; place the first and the second electrode target on the host element, and the first and second electrodes target have on distance from the electrode source; control the voltage applied between the electrode source and at least one of the first and second electrodes target, and control the voltage in such a way as to regulate the air flow resulting from the difference of potentials between the source and at least one of the first and second electrodes target to have alternately changing direction through an alternating voltage is applied between the electrode source and the first electrode is targeted between the electrode and the source and the second electrode-target.

15. The method according to 14, in which the electrode source is a corona-forming electrode.