CN103851599A - High-pressure gas discharge lamp and its cooling device - Google Patents

Abstract

A heat sink for high-pressure gas discharge lamp comprises a reflector, multiple heat-conducting metal strips and a heat sink; the reflector is of a bowl-shaped structure and made of heat conducting materials, and the side wall of the reflector surrounds a containing part which is used for containing the light source; the heat dissipation cover is of a bowl-shaped structure and made of heat conduction materials, and is matched with the reflecting cover and sleeved outside the reflecting cover; the heat-conducting metal strips are clamped between the side face of the reflecting cover and the inner side wall of the heat-radiating cover, the two side faces of the heat-conducting metal strips are attached to the side face of the reflecting cover and the inner side wall of the heat-radiating cover, so that partial heat generated by the light source is transmitted to the heat-radiating cover through the reflecting cover and the heat-conducting metal strips to be radiated, a double-layer heat-radiating structure is formed, and the temperature of the surface of the light source is reduced. Also provides a high-pressure gas discharge lamp using the heat sink of the high-pressure gas discharge lamp.

Description

High-pressure gas discharge lamp and its cooling device

technical field

The invention relates to lighting technology, in particular to a high-pressure gas discharge lamp and a cooling device thereof.

Background technique

High-pressure gas discharge lamp (English abbreviation HID, High intensity Discharge) is a type of gas discharge lamp, which produces strong light through the arc discharge in the lamp tube, combined with the inert gas or metal vapor filled in the lamp tube. It can concentrate the radiation spectrum on the required wavelength by selecting appropriate luminescent substances, and can also use several luminescent substances at the same time in order to obtain the best combined spectrum. And the high-pressure gas discharge lamp can convert 25-30% of the input electric energy into light output, which has high efficiency. Currently, commonly used high-pressure gas discharge lamps include sodium lamps, high-pressure mercury lamps, xenon lamps, and metal halide lamps.

When the traditional high-pressure gas discharge lamp is working, the heat generated by the light source is accumulated on it, and the surface temperature of the light source is often high. Especially for 400W~1000W sodium lamp or metal halide lamp, when it is working, the surface temperature of the light source can reach above 300°C. Working in a high-temperature environment for a long time will seriously affect the life of high-pressure gas discharge lamps such as sodium lamps and metal halide lamps.

Contents of the invention

Based on this, it is necessary to provide a high-pressure gas discharge lamp heat dissipation device with good heat dissipation effect.

A heat sink for a high-pressure gas discharge lamp, comprising:

The reflector is made of a heat-conducting material, the reflector is a bowl-shaped structure, and its side wall forms a receiving part, and the receiving part is used to accommodate the light source;

The heat dissipation cover is made of heat-conducting material, the heat dissipation cover is a bowl-shaped structure, the heat dissipation cover is adapted to the reflector, and is sleeved outside the reflector; and

A plurality of heat-conducting metal strips are sandwiched between the side of the reflector and the inner wall of the heat dissipation cover, and the two sides of the plurality of heat-conducting metal strips are in contact with the sides of the reflector and the inner wall of the heat dissipation cover combined, so as to transfer part of the heat generated by the light source to the heat dissipation cover through the reflector and the plurality of heat-conducting metal strips for heat dissipation.

In one of the embodiments, the side wall of the heat dissipation cover is also provided with a plurality of heat dissipation holes.

In one embodiment, the heat dissipation holes are elongated holes, and the plurality of heat dissipation holes are evenly distributed on the side wall of the heat dissipation cover.

In one of the embodiments, the heat dissipation holes extend from the bottom of the heat dissipation cover to the bowl opening of the heat dissipation cover.

In one of the embodiments, the heat dissipation holes are round holes.

In one of the embodiments, the side wall of the reflector and the side wall of the heat dissipation cover are arc-shaped, and the heat-conducting metal strip is bent so that the side close to the reflector is in contact with the side wall of the reflector. and the side of the reflector away from the reflector is attached to the side wall of the heat dissipation cover.

In one of the embodiments, fasteners are also included;

A fixing hole is provided on the heat-conducting metal strip, and the fixing hole extends from a side close to the reflector to a side far away from the reflector, and first through holes are respectively set on the side walls of the reflector and the heat dissipation cover and the second through hole, the fasteners are respectively passed through the first through hole, the fixing hole and the second through hole, so that the heat-conducting metal strip is fixed on the reflector and the heat dissipation cover between.

In one of the embodiments, the fasteners are screws and nuts adapted to the screws.

In one embodiment, the heat-conducting metal strip is an aluminum strip, and the reflector and the heat dissipation cover are formed by spinning aluminum.

In addition, it is also necessary to provide a high-pressure gas discharge lamp using the above-mentioned heat sink for high-pressure gas discharge lamps.

A high pressure gas discharge lamp comprising:

In the heat dissipation device for the above-mentioned high-pressure gas discharge lamp, a second installation hole is opened at the bottom of the reflector;

A lamp holder, the bottom of the reflector is connected to the lamp holder, the lamp holder passes through the second mounting hole, and one end of the lamp holder enters the receiving portion; and

The light source is arranged on the lamp holder and accommodated in the accommodating portion.

In the above-mentioned high-pressure gas discharge lamp cooling device and the high-pressure gas discharge lamp using the high-pressure gas discharge lamp cooling device, a heat dissipation cover is arranged outside the reflector, and heat is transferred between the reflector and the heat dissipation cover through a heat-conducting metal strip, so that the light source The heat emitted can be dissipated by the reflector and the heat dissipation cover at the same time, forming a double-layer heat dissipation structure to reduce the temperature of the surface of the light source. The practice shows that the temperature of the surface of the light source of the high-pressure gas discharge lamp adopting the heat sink of the above-mentioned high-pressure gas discharge lamp is reduced to 60% of the original value, thereby greatly prolonging the service life of the light source.

Description of drawings

Fig. 1 is the structural diagram of the high-pressure gas discharge lamp of preferred embodiment of the present invention;

Fig. 2 is a specific structural diagram of the reflector, heat-conducting metal strips and fasteners of the high-pressure gas discharge lamp shown in Fig. 1;

Fig. 3 is a cross-sectional view of the high-pressure gas discharge lamp cooling device shown in Fig. 1;

Fig. 4 is a specific structural diagram of the heat dissipation cover of the high-pressure gas discharge lamp shown in Fig. 1;

FIG. 5 is an enlarged view of A shown in FIG. 3 .

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 , a high-pressure gas discharge lamp 10 in a preferred embodiment of the present invention includes a heat sink 100 for a high-pressure gas discharge lamp, a lamp holder (not shown) and a light source (not shown). The light source is arranged at one end of the lamp holder. The high-pressure gas discharge lamp cooling device 100 includes a reflector 110 , a plurality of heat-conducting metal strips 130 , a cooling cover 150 and a fastener 170 .

Please also refer to FIG. 2 , the reflector 110 is a bowl-shaped structure, the sidewalls of which define a receiving portion 111 , and the bottom of the reflector 110 defines a second installation hole 114 . The bottom of the reflector 110 is connected to the lamp holder, and the end of the lamp holder provided with the light source passes through the second installation hole 114 and enters into the receiving portion 190 . The light source is accommodated in the receiving portion 190 , and the reflector 110 can reflect the light emitted by the light source, so that the light emitted by the light source can be converged and emitted from the mouth of the reflector 110 .

In order to facilitate light convergence, the sidewall of the reflector 110 is curved to form an arc surface, so that the light emitted by the light source can be better reflected to the bowl of the reflector 110 . A plurality of first through holes 112 are defined on the sidewall of the reflector 110 .

The heat-conducting metal strip 130 is roughly in the shape of a cuboid, and two fixing holes 132 are defined on the heat-conducting metal strip 130 , and the fixing holes 132 are arranged along the axial direction of the heat-conducting metal strip 130 . Please refer to Fig. 3 together, the side wall of the heat-conducting metal strip 130 is attached to the outer wall of the reflector 110, and the fixing hole 132 on the heat-conducting metal strip 130 penetrates from the side close to the reflector 110 to the side away from the reflector 110, and is fixed The hole 132 is aligned with the first through hole 112 .

Please also refer to FIG. 4 , the heat dissipation cover 150 is also a bowl-shaped structure, its sidewall is curved to form an arc surface, and the bottom of the heat dissipation cover 150 defines a first installation hole 152 . The heat dissipation cover 150 is compatible with the reflector 110 , and when fixed, the heat dissipation cover 150 is sleeved on the outside of the reflector 110 . A hole wall of the first mounting hole 152 is against a side wall of the reflector 110 . A plurality of second through holes 154 are defined on the sidewall of the heat dissipation cover 150 .

Please refer to FIG. 5 together. The side of the heat-conducting metal strip 130 away from the reflector 110 is attached to the inner wall of the heat dissipation cover 150, so that the heat-conducting metal strip 130 is sandwiched between the side of the reflector 110 and the inner side wall of the heat dissipation cover 150. . The fixing hole 132 is aligned with the second through hole 154 . The fasteners 170 pass through the first through hole 112 , the fixing hole 132 and the second through hole 154 respectively, so that the heat-conducting metal strip 130 is fixed between the reflector 110 and the heat dissipation cover 150 . Both the reflector 110 and the heat dissipation cover 150 are made of heat-conducting materials and have good heat-conducting properties. The two sides of a plurality of heat-conducting metal strips 130 are attached to the sides of the reflector 110 and the inner side wall of the heat dissipation cover 150, and part of the heat generated by the light source has been transferred to the heat dissipation cover 150 through the reflector 110 and the plurality of heat-conducting metal strips 130. To dissipate heat.

Specifically, in this embodiment, both the reflector 110 and the heat dissipation cover 150 are formed by spinning aluminum, and the heat-conducting metal strip 130 is an aluminum strip. The fastener 170 is a screw 172 and a nut 174 matched with the screw 172 . The screws 172 pass through the first through hole 112 , the fixing hole 132 and the second through hole 154 sequentially, and are screwed with the nut 174 , so that the heat conducting metal strip 130 is fixed between the reflector 110 and the heat dissipation cover 150 . It can be understood that the material for making the reflector 110 , the heat dissipation cover 150 and the heat-conducting metal strip 130 is not limited to aluminum, and can also be other materials with good thermal conductivity, such as silver, copper and other metal materials. The fasteners 170 are not limited to the screws 172 and the nuts 174, and can be replaced by studs, bolts and the like. The heat-conducting metal strip 130 can also be fixed between the reflector 110 and the heat dissipation cover 150 by means of welding, etc., at this time, the fastener 170 , the first through hole 112 , the fixing hole 132 and the second through hole 154 can all be omitted.

The heat-conducting metal strip 130 is bent, and the shape of the heat-conducting metal strip 130 is adapted to the side walls of the reflector 110 and the heat dissipation cover 150 after bending, so that the heat-conducting metal strip 130 is arranged on the side of the side wall of the reflector 110 and the side of the reflector 110 The walls are attached, and the side of the heat-conducting metal strip 130 away from the reflector 110 is attached to the side wall of the heat dissipation cover 150 . The two sides of the heat-conducting metal strip 130 are attached to the side walls of the reflector 110 and the heat dissipation cover 150 respectively, which increases the heat transfer area and improves the heat transfer efficiency between the reflector 110 and the heat dissipation cover 150 .

The above-mentioned high-pressure gas discharge lamp cooling device 100 is equipped with a heat dissipation cover 150 outside the reflector 110, and transfers heat between the reflector 110 and the heat dissipation cover 150 through the heat-conducting metal strip 130, so that the heat emitted by the light source can be absorbed by the reflector 110 at the same time. and the heat dissipation cover 150 emit at the same time to form a double-layer heat dissipation structure to reduce the temperature of the surface of the light source. The practice shows that the temperature of the surface of the light source of the high-pressure gas discharge lamp 10 using the above-mentioned high-pressure gas discharge lamp cooling device 100 is reduced to 60% of the original value, thereby greatly prolonging the service life of the light source.

Please refer to FIG. 3 and FIG. 4 again, a plurality of heat dissipation holes 156 are opened on the sidewall of the heat dissipation cover 150 . The heat dissipation holes 156 are elongated holes, and the plurality of heat dissipation holes 156 are evenly distributed on the sidewall of the heat dissipation cover 150 and are independent of each other. The heat dissipation holes 156 extend from the bottom of the heat dissipation cover 150 toward the bowl opening of the heat dissipation cover 150 . The extended strip-shaped heat dissipation holes 156 form a certain inclination angle with respect to the axial direction of the heat dissipation cover 150 to increase the area of the heat dissipation holes 156 .

Since the two sides of the heat-conducting metal strip 130 are attached to the side walls of the reflector 110 and the heat dissipation cover 150 respectively, a gap is formed between the side wall of the reflector 110 and the side wall of the heat dissipation cover 150, and air circulates in the gap. It is beneficial to take away the heat on the reflector 110 . Offer a plurality of cooling holes 156 on the side wall of the cooling cover 150, make the space between the side wall of the reflector 110 and the side wall of the cooling cover 150 and the outside world carry out air circulation through the cooling holes 156, further strengthen the heat dissipation of the reflecting cover 110 ability.

It should be noted that the cooling holes 156 are not limited to elongated holes, and may also be square holes, round holes, oval holes and the like. The number of fixing holes 132 provided on the heat-conducting metal strip 130 is not limited to two, it only needs to meet the requirement of fixing the heat-conducting metal strip 130 .

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A heat sink for a high-pressure gas discharge lamp, characterized in that it comprises: The reflector is made of a heat-conducting material, the reflector is a bowl-shaped structure, and its side wall forms a receiving part, and the receiving part is used to accommodate the light source; The heat dissipation cover is made of heat-conducting material, the heat dissipation cover is a bowl-shaped structure, the heat dissipation cover is adapted to the reflector, and is sleeved outside the reflector; and A plurality of heat-conducting metal strips are sandwiched between the side of the reflector and the inner wall of the heat dissipation cover, and the two sides of the plurality of heat-conducting metal strips are in contact with the sides of the reflector and the inner wall of the heat dissipation cover combined, so as to transfer part of the heat generated by the light source to the heat dissipation cover through the reflector and the plurality of heat-conducting metal strips for heat dissipation. 2. The heat dissipation device for a high-pressure gas discharge lamp according to claim 1, wherein a plurality of heat dissipation holes are opened on the side wall of the heat dissipation cover. 3. The heat dissipation device for high-pressure gas discharge lamps according to claim 2, wherein the heat dissipation holes are elongated holes, and the plurality of heat dissipation holes are evenly distributed on the side wall of the heat dissipation cover. 4. The heat dissipation device for high-pressure gas discharge lamps according to claim 3, wherein the heat dissipation holes extend from the bottom of the heat dissipation cover to the bowl mouth of the heat dissipation cover. 5. The heat dissipation device for high-pressure gas discharge lamps according to claim 2, wherein the heat dissipation holes are round holes. 6. The high-pressure gas discharge lamp cooling device according to claim 1, characterized in that, the side walls of the reflector and the side wall of the heat dissipation cover are arc-shaped, and the heat-conducting metal strip is bent so that it is close to the The side surface of the reflector is attached to the side wall of the reflector, and the side far away from the reflector is attached to the side wall of the heat dissipation cover. 7. The high-pressure gas discharge lamp cooling device according to claim 1, further comprising fasteners; A fixing hole is provided on the heat-conducting metal strip, and the fixing hole extends from a side close to the reflector to a side far away from the reflector, and first through holes are respectively set on the side walls of the reflector and the heat dissipation cover and the second through hole, the fasteners are respectively passed through the first through hole, the fixing hole and the second through hole, so that the heat-conducting metal strip is fixed on the reflector and the heat dissipation cover between. 8. The heat dissipation device for high-pressure gas discharge lamps according to claim 7, wherein the fasteners are screws and nuts matched with the screws. 9 . The heat dissipation device for high-pressure gas discharge lamps according to claim 1 , wherein the heat-conducting metal strip is an aluminum strip, and the reflector and the heat dissipation cover are formed by spinning aluminum. 10. A high-pressure gas discharge lamp, characterized in that it comprises: The high-pressure gas discharge lamp cooling device according to any one of claims 1 to 9, wherein a second installation hole is provided at the bottom of the reflector; A lamp holder, the bottom of the reflector is connected to the lamp holder, the lamp holder passes through the second mounting hole, and one end of the lamp holder enters the receiving portion; and The light source is arranged on the lamp holder and accommodated in the accommodating portion.

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