RU2470222C2 - Light diode lighting device - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention relates to lighting equipment. The device comprises a thin-walled body made of a heat conducting material with conical and cylindrical parts and a partition between them arranged inside the body, ribbing outside the body, at the same time the body is arranged in the form of a solid part without slots, a mineral glass fixed in the conical part of the body, a circuit board attached to the partition in the cavity of the conical part of the body oppositely to the glass, arranged from a heat conducting material and having light guides, current-conducting paths for supply of light diodes and fastening holes, a supply and control unit arranged on the partition in the cavity of the cylindrical part of the body, having a printed circuit board with current-conducting paths for electronic components, and also fastening screws. The circuit board with light guides is pressed to the partition via a heat-transfer pad. Connection of the circuit board with light guides with the partition and the supply and control unit with the partition is made by fastening screws arranged in insulating bushings and stretched via the specified circuit board, partition and supply and control body. At least two of the above screws are arranged in the form of conductors.

EFFECT: reduced dimensions, higher durability and operational characteristics.

21 dwg

Description

The present invention relates to lighting technology, considers the design of the housing of the lighting device, in particular the lamp housing on solid-state light sources (TIS), such as LEDs (LEDs).

Known LED lamp (hereinafter, the LED lamp) (Fig.1, 2), having a housing consisting of two parts, motionlessly interconnected. One part 1 is cast from an aluminum alloy, has a conical shape and contains a flat-convex glass 2, a diffuser 3 and a reflector 4. The glass is molded from transparent plastic and fixed in the housing by fusing specially made protruding elements 5 passing through the grooves of the conical part of the housing . The other part 6, of a cylindrical shape, is also cast from aluminum alloy and has, at the end with which it fits into the conical part, a lamp light source (board 7 with LEDs 8 and reflector 9), electrically using sealed conductors 10 of a wire type connected to a power unit (PSU) and control 11 located inside the cylindrical part. The LED board (hereinafter referred to as the LED board) is fixed to the end of the housing with screws 12 with insulating sleeves 13 through a gasket 14 made of thermally conductive material to remove heat generated by the LEDs (figure 3). For the passage of wire contacts, rectangular holes are provided at the end of this part of the housing, and the contacts (total number of contacts 10) are bent and soldered to the corresponding sites on the board manually during the lamp assembly process. The side of the cylindrical part of the casing opposite the end is closed by a metal cover 15, fastened to it with screws, on which a cap 16 is mounted for screwing the lamp into the cartridge, as well as elastic rotary elements 17 (“legs”) for holding the lamp in a standard 6 ”ceiling container. These elements are fixed in the lid with rivets 18 and have the ability to rotate around their axes, which are parallel to the axis of the lamp. Both parts of the housing are interconnected by bolts 19 (US 2009296384, F21V 9/00, published 03.12.2009). This decision was made inachestve prototype.

The cylindrical and conical parts of the lamp housing are fixedly connected by screws through a gasket of thermally conductive material. Since LEDs emit a significant amount of heat during operation, ribs are provided for dissipating it in the surrounding space and preventing overheating of the board with LEDs on both the conical and cylindrical parts of the case. The housing design is dustproof (presumably IP50), no sealing gaskets are provided, a lamp with such a housing can only be used in closed rooms with low or moderate humidity.

This case has the following disadvantages:

- the overall high complexity of the lamp assembly in this housing;

- the high complexity of the assembly of the LED board with PSU and the cylindrical part of the lamp housing;

- the screws for fastening the SD card require tides to be placed on the reverse side of the end surface of the cylindrical part of the housing to accommodate the thread. Tides increase the roughness of the contact surface of the LED board, and also increase the required height of the lamp housing by an additional approximately 3-5 mm, since they interfere with the placement of the lamp power supply board on the back side of the end of the lamp housing;

- the execution of the housing from two parts, connected by screws through a gasket of thermally conductive material, worsens the conditions for heat removal from the LED board due to technological inaccuracies in the manufacture of the housing parts and the uneven fit of the gasket to the joint surfaces, as well as due to non-zero thermal resistance of the gasket. The measured temperature difference between the cylindrical and conical parts of the housing was approximately 8 K. Since the entire allowable temperature difference between the LED crystal and the environment is approximately 25 ... 30 K, and also because there are several more thermal resistances on the heat path, namely resistance “crystal SD-housing SD”, “housing SD-board SD”, “board SD-cylindrical part of the lamp housing”, then this thermal resistance “cylinder-cone of the lamp housing” blocks transmission up to 50%, and possibly more than 50 % heat on part of the lamp housing. At the same time, most of the heat transfer surface is located precisely on the conical part of the housing, so the presence of a connector in this place of the lamp housing seems irrational;

- the design of the housing excludes the use of mineral glass in the lamp, which has the best optical characteristics and is not subject to clouding during the entire life of the lamp;

- the housing protection class limits the scope of the lamp.

The present invention is aimed at achieving a technical result, which consists in increasing the operational characteristics of the lamp, reducing its overall height by changing the layout and durability by optimizing thermal conditions.

The specified technical result is achieved by the fact that the LED lighting device comprising a thin-walled housing made of heat-conducting material with a conical and cylindrical parts and a partition between them located inside the housing, ribbing outside the housing, glass fixed in the conical part of the housing, mounted on the partition in the conical cavity parts of the case opposite the glass board made of heat-conducting material and having LEDs, conductive tracks for powering the LEDs and The openings located on the partition in the cavity of the cylindrical part of the housing, the power supply and control unit having a printed circuit board with conductive paths for electronic components, as well as mounting screws, characterized in that the housing containing the said conical and cylindrical parts, a partition and fins, is made in in the form of a single part without connectors, the board with LEDs is pressed to the partition through the heat transfer gasket, fixing screws, the connection of the board with LEDs with the partition and the power supply and control The partition with a partition is made with fixing screws located in insulating sleeves and passed through the indicated board, a partition and a power and control housing, at least two of these screws are made in the form of conductors for transmitting the supply voltage and control signals from the power supply and control to circuit board with LEDs.

Glass can be made of mineral material and fixed in the lamp housing through a sealing gasket, which is placed in grooves on the end surface of the glass and in the wall of the housing to fix the glass. Or this glass is fixed in the housing through a sealing gasket and fixed by an expanding ring placed inside the cavity sealed by this gasket.

The cover of the cylindrical part of the housing for accommodating the cartridge or pressure passage for supplying power cables is fixed in this part of the housing through a sealing gasket, which is placed in the grooves on the end surface of the cover and in the wall of the housing. Or this cover can be fixed in the housing through a sealing gasket and fixed with an expandable ring placed inside the cavity sealed by this gasket.

This cover of the cylindrical part of the housing can be made of removable and non-removable parts, the first of which is fixed in the housing through a sealing gasket, which is placed in the grooves on the end surface of the cover and in the wall of the housing, or through a sealing gasket and an expansion ring, and the removable part is fixed to fixed parts with screws or studs through at least one sealing gasket.

To fix the lamp in the package or during installation on the case, spring-loaded elastic elements are fixed, made in the form of metal strips, which are mounted on the body with the possibility of their rotation around the axis of the fasteners, and the axis of the fasteners is inclined relative to the vertical axis of the case.

These signs are significant and interconnected with the formation of a stable set of essential features sufficient to obtain the desired technical result.

The present invention is illustrated by a specific example of execution, which, however, is not the only possible, but clearly demonstrates the possibility of achieving the desired technical result.

Figure 1 - appearance of the lamp CREE LR6, prototype;

figure 2 - section lamp CREE LR6, prototype;

figure 3 - section of the lamp housing CREE LR6 on the screw securing the SD-board, prototype;

figure 4 - thermal resistance from the crystal of SD to the surrounding space, the prototype;

figure 5 - shows the housing of the LED lamp without a connector between the conical and cylindrical parts made according to the present invention (the cover of the cylindrical part and the elements of the optical system are not shown);

FIG. 6 shows the transmission of electrical signals to the LED board by the mounting screws for the LED lamp of FIG. 5;

Fig.7 - shows the sealing and fixing of glass in the housing of the LED lamp of Fig.5;

Fig. 8 shows a separation of the fastening and sealing elements of the glass of the LED lamp of Fig. 5;

Fig.9 - shows a LED lamp with a cap E27 on the top cover;

figure 10 - shows a LED lamp with a cap GU24 on the top cover;

11 - shows the top cover with a gas passage (simple) for LED lamps in figure 5;

Fig. 12 shows a top cover with a pressure seal (integral) for the LED lamp of Fig. 5;

Fig.13 is a back cover with a gas passage (composite), and with two cables of the LED lamp of Fig.5;

Fig - rear view of the lamp CREE LR6, the petals are folded, prototype;

Fig.15 is the same as in Fig.14, the petals are partially deployed;

Fig.16 is the same as in Fig.14, the petals are fully deployed;

Fig - shows a section of a container placed in a packaging box, shows a curved petal, a prototype;

Fig.18 - LED lamp with an inclined fastening of the petals;

Fig.19 is an enlarged fragment of the place of fastening of the petal;

Fig.20 is the same as in Fig.18, the petals are open;

Fig.21 - LED lamp mounted on a U-shaped bracket.

The present invention considers the design of the housing of the lighting device, in particular, the lamp housing on TIS - LEDs. To achieve a technical result, it is proposed that the lamp housing be made without a connector between the conical and cylindrical parts of the housing; for transmitting electrical signals to and from the LED board, it is proposed to use the fixing screws of the LED board, the glass insulated from the structure can be made of mineral material, the glass sealant can at the same time serve as its fastening element, it is possible to separate the fastening and sealing elements of the glass, the sealing gasket of the back cover of the housing can simultaneously serve as its fastening element, it is possible to separate the fastening and sealing elements of the back cover of the housing, it is possible to completely seal the back cover of the lamp housing using the seal of the lamp power cable. A completely tight design of the back cover of the lamp housing is possible, with the use of a seal on the lamp power cable and the possibility of using the lamp as a mounting box, for connecting a series of lamps to a series circuit without using any additional connecting or mounting boxes.

The inclined, relative to the lamp axis, placement of the rotation axes of the elastic rotary elements (“legs”) of the housing allows to increase the engagement force of the “legs” behind the lamp container, avoids the need to choose the mounting position of the “legs” depending on the inner diameter of the lamp container, allows you to the lamp housing relative to the container, when removed, in any direction, and not just strictly specified.

Solid state light sources, in particular LEDs, have now made significant progress in terms of the efficiency of converting electrical energy into visible light energy (Lumen per Watt), surpassing the recognized leaders in office lighting in this parameter - fluorescent lamps, usually called fluorescent lamps - approximately 1.5 times, and compact fluorescent lamps (CFL), also called usually "energy-saving lamps" - more than 2 times. Solid-state light sources, in particular LEDs, recently crossed the line of 100 lumens per watt. See the description of CREE XP-G LEDs (XLampXP-G.pdf), and MX-6 LEDs of the same CREE company (XLampMX-6.pdf). Nevertheless, the problem of heat removal from the crystals of the LED lamp is still an acute problem. The fact is that even an efficiency of 100 Lumens per Watt means “only” 25% of the conversion of the supplied electric energy into light. This is a lot when compared with a conventional incandescent lamp, in which the efficiency is about 3%, but still the remaining 75% is released in the form of heat, and this heat should be effectively removed from the LED crystal. LEDs decrease their efficiency with increasing crystal temperature. The life of the LED also begins to decrease. The CREE LED luminaire development guide recommends limiting the temperature of an LED crystal to a ceiling of 80 degrees Celsius. At the same time, the ambient temperature at which the lamp should function normally for a long time, usually 50,000 hours, is taken to be 55 ° C (office building with a ventilated ceiling). It is clear that an office or home suspended ceiling may not be ventilated, so that a temperature of 55 ° C does not seem excessive. It is even better to choose a target temperature of 60 ° C behind the target. Total, the entire temperature difference “crystal SD-environment” is 20 ° C.

Let us consider in detail how this temperature difference is distributed over all links of the thermal chain.

Tkr = Tokr + (Rtepl pl-okr × General) + (Rtepl kr-korp × RSD)

Tcr = crystal temperature SD

Tokr = Ambient temperature

Rtepl pl-okr = Thermal resistance of the heat sink (lamp housing)

RSD = The allocated power of one LED

= (Operating LED current) × (Typical voltage drop across LED with LED Operating current) × (1-LED efficiency)

Roschaya = Total allocated power = (number of LEDs) × RSD

RTep kr-korp = Thermal resistance of the housing SD

For example, for a lamp with the following parameters (on 16 LEDs CREE XR-E) we get:

Tkr MAX = 80 ° C

RTpl pl-okr = 0.47 ° C / W

Light efficiency SD≈0.17 (17%)

RSD = 0.3 A × 3.1 B × (1-0.17) = 0.7719 W

Rosal = 16 × 0.7719 W = 12.35 W

R heat cr-corp = 8 ° С / W

Tokr MAKS = Tkr MAKS - (RTepl ok-okr × General) - (RTepl kr-korp × RSD)

Tokr MAX = 80 ° C - (0.47 ° C / W × 12.35 W) - (8 ° C / W × 0.7719)

Tokr MAX = 80 ° С-5.8045 ° С-6.1752 ° С

Tokr MAX = 68 ° С

It seems to be so far - everything is not bad, but the following factors should be taken into account. Firstly, the thermal resistance of the LED housing of 8 ° C / W is the achievement of CREE. For other manufacturers, this resistance is usually higher and amounts to 9-12 ° C / W. Secondly, TIS, and in particular SD, require low-voltage power. With a typical voltage at the LED transition equal to 3.1 V, when connecting 16 LEDs to a serial circuit, we obtain ≈50 V of the supply voltage at a direct current of 0.3 A. That is, the power consumed by the LED is 15 W. Existing power supplies that convert an alternating voltage of 110 V or 220 V to a constant voltage, say 50 V, and at the same time stabilizing the LED current (which is necessary for their long and stable operation) have an efficiency of not higher than 85%. A typical value is 75%. That is, in order to supply 15 W power to the circuit from the SD, the power supply will “pick up” 15 / Efficiency = 20 W from the network. The difference of 5 W in the power consumed from the network and the power allocated to the LED should also be dissipated in the surrounding space by the lamp housing. Add this power to Roshchaya in the expression for the maximum ambient temperature in the above example of the LED fixture, and also substitute the more common value for the thermal resistance of the LED housing, equal to 12 ° С / W;

Tokr MAKS = Tkr MAKS - (RTepl ok-okr × General) - (RTepl kr-korp × RSD)

Tokr MAX = 80 ° C- (0.7 ° C / W × (12.35 + 5) V) - (12 ° C / W × 0.7719 W)

Tokr MAX = 80 ° С-8.1545 ° С-9.2628 ° C

Current Max = 62.6 ° C

This already almost coincides with our expected maximum ambient temperature of 60 ° C.

To reduce the overall thermal resistance of the “SD-environment crystal", it is necessary to use a set of measures, but the main thing (if you do not consider such exotic, although used in some developments, solutions, such as forced blowing of the SD radiator with a fan, namely, a fan-shaped fan driven into action, for example, with a ferroelectric plate oscillating in the case of applying alternating voltage to its plates, and "blowing off" the boundary layer of air from the radiator (US 7213940, publ.) - it is necessary to increase the useful area of the radiator (housing). To do this, it is proposed to make the lamp housing - without a connector between the conical and cylindrical parts of the housing.In this case, the thermal resistance Rtepl pl-okr (thermal resistance of the heat sink, lamp housing) is reduced by about 1.8-2 times, which will either reduce the size and weight of the lamp housing, or use cheap LEDs with high thermal resistance of the housing, or will increase the number of LEDs, which means the light output of the lamp, or you can do both one and the other, and the third. Given that the cost of the lamp housing and power supply is up to 80% of the cost of the entire lamp, an increase in the number of LEDs will not greatly affect its total price, but, on the other hand, it will allow more light from one lamp, and possibly reduce the total number of used fixtures, and this is a direct way to save money.

Thus, in the framework of the present invention, the design of an LED lighting device is considered, which includes a thin-walled case made of heat-conducting material with a conical and cylindrical parts and a partition between them, located inside the case, ribbing outside the case, glass fixed in the conical part of the case, fixed on the partition in the cavity of the conical part of the body opposite the glass, a board made of heat-conducting material and having LEDs, conductive lanes power LEDs and mounting holes, disposed on the baffle in the cavity of the cylindrical body portion and the power supply control, having a printed circuit board with wirings for electronic components, and the fastening screws. The case, which contains the aforementioned conical and cylindrical parts, the baffle and fins, is made in the form of a single piece without connectors, the board with LEDs is pressed to the baffle through a heat transfer gasket. The connection of the board with the LEDs with the baffle and the power supply and control unit with the baffle is made by fixing screws located in the insulating bushings and passed through the specified board, the baffle and the power and control casing. At the same time, at least two of these screws are made in the form of conductors for transmitting the supply voltage and control signals from the power supply and control unit to a board with LEDs.

Glass can be made of mineral material and fixed in the lamp housing through a sealing gasket, which is placed in grooves on the end surface of the glass and in the wall of the housing to fix the glass. Or this glass is fixed in the housing through a sealing gasket and fixed by an expanding ring placed inside the cavity sealed by this gasket.

The cover of the cylindrical part of the housing for accommodating the cartridge or pressure passage for supplying power cables is fixed in this part of the housing through a sealing gasket, which is placed in the grooves on the end surface of the cover and in the wall of the housing. Or this cover can be fixed in the housing through a sealing gasket and fixed with an expandable ring placed inside the cavity sealed by this gasket.

This cover of the cylindrical part of the housing can be made of removable and non-removable parts, the first of which is fixed in the housing through a sealing gasket, which is placed in the grooves on the end surface of the cover and in the wall of the housing, or through a sealing gasket and an expansion ring, and the removable part is fixed to fixed parts with screws or studs through at least one sealing gasket.

To fix the lamp in the package or during installation on the case, spring-loaded elastic elements are fixed, made in the form of metal strips, which are mounted on the body with the possibility of their rotation around the axis of the fasteners, and the axis of the fasteners is inclined relative to the vertical axis of the case.

Below is an example of the implementation of such a lighting device.

Figures 5, 6 show an LED lamp made according to the present invention, having a three-dimensional shape thin-walled body 20 made of an aluminum alloy or other material with good thermal conductivity (the body is made of heat-conducting material). This case is made in the form of one integral part and a partition 21 is made in it, on which there is a board 22 with LEDs 23. The case has a conical and cylindrical parts, between which inside the case there is a partition 21. The mentioned conical and cylindrical parts, the partition and the fins are one the whole and do not have connectors.

Between the board 22 and the partition 21 there is a gasket 24 made of heat-conducting material. On the other side of the partition is the power supply and lamp control unit 11. When the screws 12 are screwed into the nuts 26 rigidly fixed on the board 25 of the block 11 of the nut 26, the board 22 is attracted to the partition 21 through the gasket 24, thereby providing better contact of their surfaces and, therefore, more efficient heat transfer. At the same time, the block 11 is thus fixed in the lamp housing. To electrically isolate the block 11 and screws 12 from the housing 20, there are plastic bushings 27. For heat removal to the environment, the housing has fins 28 made integral with it.

The next problem of the prototype - the CREE LR6 lamp - is a method of transmitting electrical signals, in particular - power to the LEDs - through a connector isolated from the lamp housing, the conclusions of which must be manually bent and manually soldered when assembling the lamp. Of course, this solution is the most economical in terms of the cost of the components used (the connector does not cost almost anything), but the lamp assembly work cannot be automated and must be done manually. In addition, the manual soldering of the connector contacts to the LED board, which is deliberately made of a material that is well heat-removing, aluminum, attached through a heat-conducting gasket to the radiator (aluminum lamp housing) is a separate and complex task and work. A special solder may be required. It may be necessary to heat up the assembled “top”, the cylindrical part of the LR6 CREE lamp, or use an extra powerful soldering iron (which can also melt the connector itself!), But all this is not so simple to carry out.

At the same time, there is another way of transmitting electrical signals from the lamp power supply to the LED board, namely, it is possible to combine the fastener of the SD board and the supply of electrical signals to it through the mounting screws.

At the same time, the mounting screws of the SD-board can simultaneously serve for mounting the assembled PSU 11 in the lamp housing, which significantly speeds up the lamp assembly and allows it to be mechanized and automated. Before assembly, it is advisable to cover the screws with a thin layer of an anticorrosive coating, for example, gold or nickel, and also lubricate the ends of the screws or all screws before assembly with some liquid or solid lubricant to prevent possible corrosion at the junction of dissimilar metals. You can cover the contact pads of the board and screws with the same metal, for example, nickel or gold, and corrosion will not occur.

Figure 6 shows the fastening screw 29, through which an electrical signal is supplied from the unit 11 to the card 22. When screwed into the nut 30, the screw head 29 enters the current path 31 of the card 22. The nut 30, when securing (flaring) on the card 25, is also included contact with the conductive path 32 of this board. Thus, there is an electrical connection of the power supply 11 and the LED board 22, while the lamp design must have at least two such connections. From the partition 21 of the housing 20, the power supply 11 and the screw 29 are isolated using a sleeve 27.

In the prototype - the CREE LR6 LED lamp - the glass of the lamp is made of optical polycarbonate and has special tides, the purpose of which is to fix the glass in the lamp housing. To fix the glass, the tides of the protruding beyond the lamp housing are melted, for example, with a soldering iron, and then this place is additionally sealed with a compound. This technique is good for its simplicity, but also has a number of disadvantages. The first drawback is that the glass of the lamp can only be made of thermoplastic material. This is quite acceptable for lamps that are used indoors. If the lamp is designed for outdoor use, in conditions of seasonal changes in ambient temperature, dust, dirt, precipitation, etc. (and the service life of a TIS lamp, in particular an LED lamp, is 10 years or more), it may be necessary to use glass made of mineral material.

The second drawback is that glass fixed by the CREE lamp method is difficult to seal, since the protruding glass elements of the CREE lamp have a complex shape, and sealing the melted part of the glass with sealant can only partially solve this problem. In the end, both the melting and sealing of the protrusions must be done by man, and it is human nature to make mistakes. It is advisable to exclude the influence of the human factor on the design of the lamp, which should last 10-15-25 years, and not to let dust, moisture, or insects go inside. To do this, a glass lamp design with an annular groove along the glass edge is proposed. In Fig.7 shows the junction of glass 2 with the housing 20 of the lamp. The joint is sealed by a gasket (ring) 33, which also serves as a fixing element for glass 2 and diffuser 3.

Due to the specified profile of the lamp housing (entrance chamfer + cylindrical part), elasticity and fluidity of the gasket material (rubber, silicone and other rubber-like materials), as well as a selected profile of the gap between the glass 2 and the lamp housing 20, when the glass is planted in the housing, the gasket is first crimped by the entrance the chamfer 34 of the housing 20 is then deformed, and fills the gap or part of the gap between the glass and the lamp, and finally flows into the recess 35 intended for it in the lamp housing. To improve the sliding and flowing of the gasket, and to facilitate the assembly of the glass and the housing, additional liquid or solid lubricant may be used, or it may not be used, but the principle of simultaneous fixing and sealing of the lamp glass with a gasket made of rubber-like material remains unchanged.

This method allows you to firmly fix the glass in the lamp housing, but this fixation is reversible, that is, the glass can not only be inserted, but also removed, for example, using a vacuum suction cup to remove the glass. If, for some reason, irreversible fixation of the glass is required, then the glass fixing structure shown in Fig. 8 can be applied. When glass 2 is planted in the housing 29, a spring ring 36 having a diameter larger than the outer diameter of the glass is crimped by the entry chamfer 34 of the housing 20 in the groove 37 of the glass 2, which has a depth sufficient for the ring 36 to fit completely in it. With further movement, it enters the groove (groove 37) of the housing 20 and is expanded in it due to its elastic properties.

A rubber-like gasket 33 seals the glass, and a metal or plastic expandable snap ring 36 locks it in place, and it is no longer possible to remove it from the housing.

You can also put an external expandable metal or plastic spring-loaded ring, but a pair of dissimilar metals “lamp housing-retaining ring” creates conditions for electrochemical corrosion in this place, and such a glass lamp will no longer be inseparable.

Similarly, the problem of sealing the upper cover of the lamp housing can be solved. Either a single rubber gasket is used to seal and fix the upper cover of the lamp housing, or a gasket of rubber-like material for sealing, and a metal or plastic expansion ring are used to irreversibly fix the upper cover of the lamp housing. You can also put an external expandable metal or plastic spring-loaded ring, but such a top cover will no longer be non-separable.

On the top cover of the lamp housing, you can attach a connector or cap to supply voltage to the lamp. Figure 9 shows a lamp with a base E27, and figure 10 with a base GU24 on the top cover.

At the same time, the street version of the lamp in accordance with IP66 standards (IP65, 66, 67, 68) requires complete lamp tightness. This becomes possible in the proposed housing design, if a pressure seal is mounted in the rear housing cover, for example, under a cable of circular cross section in double insulation. In this case, due to the fact that the glass of the lamp and the back cover of the lamp are already sealed, a pressure passage (sometimes also called a pressure seal) logically completes the design of the lamp housing, which is designed to operate in any weather conditions during its entire service life, i.e. typical 50,000 or 100,000 hours of continuous "burning".

The back cover of the lamp housing can be made simple, with a hole or thread for screwing in the pressure seal, or composite, that is, consisting of 2 or more parts. Simple design - cheaper, composite - more convenient for the consumer.

11 shows a simple cover for a sealed lamp design. The sealing of the junction of the lid 38 with the housing 2 is provided by the gasket 39, and its fixation by the spring ring 40, similar to that described above for glass 2 (for example, Fig. 8). Germovvod 41 ensures the tightness of the passage into the lamp housing of the incoming cable 42, the cores of which are clamped in the terminal block 43 located on the power supply 11. After the user has connected the cable to the power supply, he closes the cover 38, after which the lamp becomes non-separable. 12 shows a composite lamp top cover. The sealing of the junction of the non-removable part 44 of the cover with the housing 2 is provided by the gasket 39, and its fixation by the spring ring 40, as in FIG. 11. The removable part 45 of the cover is fixed with screws 46, screwed into the blind threaded holes of the non-removable part 44. Sealing the junction of the removable and non-removable parts of the cover is done by the gasket 47. The sleeve 41 is screwed into the removable part 45 of the cover and seals the passage of the cable 42. It is also possible to make the screw 46 screwed into the through holes of the fixed part 44 of the cover. In this case, it is possible to reduce the mass of the cover, but will require taking measures to seal each screw.

The composite top cover will allow, while maintaining the tightness of the lamp housing, to provide access to the installer inside the lamp housing, which is necessary when connecting the lamp to the power cable. It also allows you to use the lamp as a junction box, that is, it allows you to connect the wires of 2 cables in and out inside the lamp, and thus allows you to connect the lamps in series, in long chains, without using any additional mounting or junction boxes that if they were required, they would also have to be implemented in accordance with IP66 standards, which is very, very expensive, and also not always convenient.

On Fig shows a lamp with incoming and outgoing cables. Germovvod 41 provides a sealed passage into the lamp housing of the incoming 42 and leaving 48 cables. The cores of the incoming cable are joined to the terminal block 43, and the output cable to the block 49 of the power supply 11 and the lamp control. With this use of the lamp, a sealing element of a pressure passage with two holes is required for incoming and outgoing cables, respectively. Such sealing elements are widely marketed, and are available, for example, from Hummel AG (KV-Katalog-low.pdf from www.hummel.com, pp. 42-43).

In conclusion, let us dwell on the problem of fixing the lamp in the place intended for it. The prototype, a CREE LR6 lamp, has for this purpose petals, or “legs” of elastic sheet material, mounted on the top of the lamp with rivets, so that their axis of rotation is parallel to the axis of the lamp.

On Fig shows a view of the lamp CREE LR6 from the base, that is, from above. Elastic elements (“legs”) 17 are attached to the top cover 15 by rivets 18. As can be seen in the photo, the cover 15 has tides with protrusions that provide some fixation of the “legs” in three positions: fully retracted (a), intermediate (b) and fully issued (in). Positions b and c can be applied when installing the lamp in containers of various diameters. To remove the lamp from the container, turn it by the flange on the glass side counterclockwise. On Fig and 16 it is also clearly visible that the protrusions on which the "legs" are fixed overlap several fins of air cooling of the lamp housing, thereby impairing the heat transfer of these ribs. When the lamp slides into the container intended for it, with a diameter of 5.5 to 6.5 inches, the petals bend and abut against the wall of the container with their sharp edge, preventing the lamp from falling out of the container. On Fig shows the lamp LR6, fixed inside the standard container using the compressed "legs" 17.

Since the LR6 lamp is declared as retrophytic, that is, replacing the old incandescent lamp in its place, existing containers for such a lamp have a significant variation in internal diameter, from 5.5 to 6.5 inches. To compensate for this variation, the petals of the lamp before installation can be located in several fixed positions (Fig.14-16). The smaller the diameter of the container, the more extreme the petal should be and the less it will bend when the lamp is inserted into the container. This solution of mounting tabs is not optimal for our lamp housing.

Firstly, it is difficult to make rivets airtight, and we need exactly a sealed body that meets the requirements of IP66.

Secondly, any adjustment of the system parameters before installation is possible, but undesirable. It is necessary to exclude the influence of the human factor on the installation quality of the lamp, therefore, it is necessary to exclude the need to adjust the lamp petals to the diameter of the container. In addition, when you turn the petal from the axial position to any tangential, the petals will no longer be in contact with the container at 2 points, but most likely there will be one contact point. How reliable it is is difficult to judge, but it is clear that the point-to-point contact of the petal with the container body is preferable to single-point.

Thirdly, to remove the CREE LR6 lamp from the container, you need to turn it counterclockwise by some angle. The petals are "tucked" inward and the lamp can be removed from the container. If the installer forgot or could not adjust the lamp petals to the diameter of the container, removing the lamp from it can be problematic, because there will be several intermediate position locks on the way to turn the petal.

Fourth, the rotation limiters of the petals on the back cover prevent the air flow from flowing over several cooling ribs of the lamp housing at once, which reduces the efficiency of the lamp housing as a radiator that removes heat from the LED board.

In the present design of the lamp according to the invention, it is proposed to fix the petals (“legs”) in inclined positions. The inclined, relative to the lamp axis, placement of the axis of rotation of the elastic rotary lobes (“legs”) of the housing allows you to increase the engagement force of the “legs” of the lamp container, thanks to the 2-point contact of the petal to the housing, instead of, in most cases, a single-point lamp CREE LR6, avoids the need to choose the mounting position of the petals depending on the inner diameter of the lamp container, allows you to rotate the lamp housing relative to the container, when removed, in any direction, and not just strictly specified, and allows t easily remove the lamp mounted in a container of any size (ranging from 5.5 to 6.5 inches internal diameter). Additionally, on the cooling fins, on which the rotary lobes are mounted, you can make holes for fixing the lamp with bolts in containers of other types and sizes, or for fixing the lamp on a U-shaped bracket, as is usually done when installing lamps and spotlights for outdoor lighting of buildings, parks , gardens, ponds, paths, etc.

FIG. 18 shows a lamp with elastic elements (“legs”) 17. The threaded holes 52 are made in the tides 50 into which the screws 51 are screwed (FIG. 19). They hold the "legs" 17, made of spring sheet steel, having, at the ends adjacent to the ribs 11 of the body, punching (so-called beetle) 53, locking the "legs" in the open position (Fig. 18). To remove the lamp from the container, it is necessary to turn it in any direction, while the "legs" 17 turn around the screws 51, as shown in Fig.20. Also, in the tides 50, additional threaded holes 54 are made. As can be seen from Figs. 18, 19, the housing design allows free passage of air along the entire fins of the lamp.

On Fig shows a sealed lamp, mounted on a U-shaped bracket 55 on the surface 56, such as the ceiling of the garden gazebo, with fixing screws 57. The bracket is attached to the housing with screws 58, screwed into the holes 54 (Fig. 18). Power is supplied via cable 42 through pressure seal 41. In this design, a decorative flange on the lamp housing is not needed.

Claims (7)

1. LED lighting device containing a thin-walled case made of heat-conducting material with a conical and cylindrical parts and a partition between them, located inside the case, a rib on the outside of the case, glass fixed in the conical part of the case, fixed on the partition in the cavity of the conical part of the case opposite the glass plate made of heat-conducting material and having LEDs, conductive paths for powering the LEDs and mounting holes located on the partition in the floor the cylindrical part of the housing, the power supply and control unit having a printed circuit board with conductive paths for electronic components, as well as fixing screws, characterized in that the housing containing the said conical and cylindrical parts, a partition and fins, is made in the form of a single piece without connectors the board with LEDs is pressed to the partition through the heat-transfer pad, fixing screws, the connection of the board with LEDs with the partition and the power supply and control unit with the partition is made by fixing screws placed in insulating sleeves and passed through the specified board, partition and the power supply and control housing, at least two of these screws are made in the form of conductors for transmitting power supply and control signals from the power supply and control unit to the LED board . 2. The device according to claim 1, characterized in that the glass is made of mineral material and is fixed in the lamp housing through a sealing gasket, which for fixing the glass is placed in the grooves on the end surface of the glass and in the wall of the housing. 3. The device according to claim 1, characterized in that the cover of the cylindrical part of the housing for accommodating the cartridge or pressure passage for supplying power cables is fixed in this part of the housing through a sealing gasket, which is placed in the grooves on the end surface of the cover and in the wall of the housing. 4. The device according to claim 1, characterized in that the glass is made of mineral material and is fixed in the housing through a sealing gasket and is fixed by an expandable ring placed inside the cavity sealed by this gasket. 5. The device according to claim 1, characterized in that the cover of the cylindrical part of the housing for accommodating the cartridge or pressure passage for supplying power cables is fixed in the housing through a sealing gasket and is fixed with an expandable ring placed inside the cavity sealed by this gasket. 6. The device according to claim 1, characterized in that the cover of the cylindrical part of the housing is made of removable and non-removable parts, the first of which is fixed in the housing through a sealing gasket, which is placed in the grooves on the end surface of the cover and in the wall of the housing, or through a sealing gasket and an expanding ring, and the removable part is fixed to the non-removable part with screws or studs through at least one sealing gasket. 7. The device according to claim 1, characterized in that it contains elastic spring elements for fixing it in the package and during installation, made in the form of metal strips mounted on the housing with the possibility of their rotation around the axis of the fasteners, and the axis of the fasteners is inclined relative to vertical axis of the housing.

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