CN213089471U - LED filament bulb shell with bulb-in-bulb structure - Google Patents

Abstract

The utility model discloses a LED filament bulb shell with bubble structure in bubble, including the cell-shell main part, characterized by, the inside interior bubble that is equipped with of cell-shell main part, cell-shell main part and interior bubble integrated into one piece, cell-shell main part include the bottom cell-shell and lie in the material handle that seals at top, form an airtight space between bottom cell-shell and the interior bubble. The utility model has improved structure on the basis of the traditional LED filament bulb, achieves better filament heat dissipation effect, and ensures the service life of the LED filament; and absorbs the mature technology on the incandescent bulb, so that the inside of the bulb obtains good air tightness, and the requirement of filling high-thermal-conductivity gas is met.

Description

LED filament bulb shell with bulb-in-bulb structure

Technical Field

The utility model relates to a bulb shell especially relates to a LED filament bulb shell with bubble structure in bubble.

Background

The LED lamp filament is also called as an LED lamp post, the traditional LED light source needs to reach a certain illuminance and illumination area, optical devices such as lenses need to be additionally arranged, the illumination effect is influenced, the due energy-saving effect of the LED can be reduced, the LED lamp filament realizes 360-degree full-angle illumination, large-angle illumination and no lens is needed, and a three-dimensional light source is realized.

The LED filament has the advantages that: 1. a 360-degree light-emitting three-dimensional light source; 2. a blue light chip and a red light chip yellow-green powder are manufactured into a white light packaging process; 3. the high-voltage drive is integrated, so that the power factor of a power supply is maximized, and the cost of a lamp is minimized; 4. the color rendering index of the high-quality light source can be more than 90 and the light efficiency can be more than 120lm/W at present;

however, to date, the problems in the production of LED filament lamps remain largely ignored: the manufacturing process is difficult, and needs to integrate several different processes, so that the yield is low; the LED filament lamp exceeding 8W is easy to have the heat dissipation problem; is easy to break and is easy to damage in the production and use processes. The ambient temperature Ta =25 ℃, the LED filament works under low thermal voltage, the surface temperature of the LED filament is less than or equal to 60 ℃, and the LED filament is safe and reliable. However, when the power of the LED filament is 10W, 20W or even higher, the temperature of the LED filament can reach over 100 ℃ if no effective heat dissipation measures are taken, which seriously affects the life of the LED filament. Therefore, the heat dissipation problem of the LED filament bulb is to be solved.

For example, a chinese patent publication discloses a "lamp having a double-layered bulb", which is disclosed in the publication No. 111306462, and includes a lamp holder on which a bulb is disposed, and an outer bulb disposed outside the bulb, the outer bulb surrounding the bulb, and the outer bulb being disposed on the lamp holder. This prior art has only alleviated bulb surface temperature, can't reduce filament surface temperature.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome thereby the problem that high-power, high brightness LED filament surface high temperature of prior art can't effectively give off and influence the filament life-span, provide a LED filament bulb shell with bubble structure in the bubble, improve the radiating efficiency.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a LED filament bulb shell with bubble structure in bubble, includes the cell-shell main part, characterized by, the inside bubble that is equipped with of cell-shell main part, cell-shell main part and interior bubble integrated into one piece, cell-shell main part include bottom cell-shell and lie in the material handle of sealing at top, form an airtight space between bottom cell-shell and the interior bubble

When only a single layer bulb envelope is present, heat dissipation from the filament is primarily by two routes: thermal radiation and heat conduction through the gas inside the bulb envelope. The radiation source in the case of a single-layer bulb is a filament light-emitting body and a bulb envelope. When an inner bulb of a bulb-in-bulb structure is arranged inside the bulb envelope, the inner bulb also acts as a radiation source due to the temperature increase, which is higher due to the closer distance to the filament compared to the bulb envelope. According to basic knowledge of heat transfer science, the intensity of thermal radiation is in direct proportion to the fourth power of the Kelvin temperature, and a small amount of temperature rise can increase the huge improvement of the intensity of thermal radiation. According to the principle of energy conservation, under the condition of certain filament power, more heat is emitted by the inner bulb in the form of heat radiation, so that the heat accumulation on the surface of the filament is reduced.

In addition, because the interior of the incandescent lamp bulb generally needs to be kept in vacuum or filled with inert gas, the air tightness of the interior of the bulb needs to be ensured, and the technology of sealing the sealing material handle and the base is mature on the incandescent lamp bulb, so the cost of applying the sealing material handle to the LED filament bulb is low, and the effect is good.

Preferably, the base is arranged on the sealing material handle, the caliber of the sealing material handle is reduced and the sealing material handle is hermetically connected with the base, and an inner bubble space with an upward opening is formed inside the inner bubble.

The inner bubble forms a closed space inside, which can effectively prevent the high temperature inside the inner bubble from diffusing into the lower base through heat convection at that time.

Preferably, the base is provided with a core column and a filament, and the core column and the filament extend into the inner bubble space.

The arrangement of the stem and the filament in the inner bulb ensures that the heat radiated from the stem and the filament is first absorbed by the inner bulb.

Preferably, the inner bubble is filled with a highly thermally conductive gas.

In order to dissipate heat on the surface of the filament as soon as possible, the heat radiation of the filament is insufficient, so that high-thermal-conductivity gas needs to be filled in the inner bulb, the high temperature on the surface of the filament is utilized to improve the activity degree of the heat movement of the gas molecules in the inner bulb, and more heat is taken away from the surface of the filament. .

Preferably, the high thermal conductive gas is a heliox gas.

The heat conduction effect is different when the gas is filled. Among the common gases, the gas with the highest thermal conductivity is hydrogen, however, hydrogen has the danger of being flammable and explosive, and therefore, is not suitable as the filling gas in the inner bubble. Helium is second only to hydrogen in thermal conductivity and chemically stable, so helium is a good choice. However, in the course of development, it was found that the effect of using pure helium is not very desirable, and therefore the developers tried different combinations of gases and finally found that the heliox, which is usually the breathing gas for divers, works best.

Preferably, a high thermal conductive gas is filled in a sealed space formed by the bulb body and the inner bulb.

In the filament bulb provided with the inner bulb, the temperature of the inner bulb is high, and heat is dissipated through radiation. In order to better dissipate heat, the closed space between the bulb shell and the inner bulb is filled with high-thermal-conductivity gas, and heat on the inner bulb can be dissipated in a heat conduction and radiation parallel mode.

Preferably, the high thermal conductive gas is a heliox gas.

Also, the same gas as in the inner bulb is used as the filling.

Therefore, the utility model discloses following beneficial effect has: (1) the surface of the filament can be effectively radiated; (2) the process is mature, and the structure is simple.

Drawings

FIG. 1 is a schematic structural diagram of the main body of the bulb shell of the present invention;

fig. 2 is a schematic view of the overall structure of the bulb of the present invention;

in the figure: 1. the bulb shell comprises a bulb shell main body 2, an inner bulb 3, a base 4, a lamp post 5, a lamp filament 6, a sealing material handle 7 and a bottom bulb shell.

Detailed Description

Embodiment 1, as shown in fig. 1 and 2, an LED filament bulb shell with a bulb-in-bulb structure includes a bulb shell main body 1, an inner bulb 2 is disposed inside the bulb shell main body 1, the bulb shell main body 1 and the inner bulb 2 are integrally formed, the bulb shell main body 1 includes a bottom bulb shell 7 and a sealing material handle 6 located at the top, and a closed space is formed between the bottom bulb shell 7 and the inner bulb 2.

In this embodiment, the entire outer shape of the bulb body 1 is similar to that of a general incandescent lamp, and is pear-shaped. The appearance process is mature, and the cost is lowest. The main bulb body 1 may also be shaped as desired if a particular shape is desired. When the bulb shell is manufactured, a hole is required to be reserved on the inner bulb 2 to be separated from the bulb shell main body 1, gas is filled between the bulb shell main body 1 and the inner bulb 2, and the hole is sealed after the gas is filled.

Further, the base 3 is arranged on the sealing material handle 6, the caliber of the sealing material handle 6 is reduced, the sealing material handle is connected with the base 3 in a sealing mode, and an upward opening inner bubble space is formed inside the inner bubble 2.

In the embodiment, the whole bulb shell comprises a bulb shell main body 1, an inner bulb 2 and a sealing material handle 6, and in the processing process of the bulb shell main body 1, the three parts are combined into a bulb shell with a bulb-in-bulb structure through a glass sealing process. The shape of the inner bulb 2 and the bulb shell main body can be any shape, and the inner bulb 2 is smaller than the bulb shell main body 1.

Furthermore, a core column 4 and a filament 5 are arranged on the base 3, and the core column 4 and the filament 5 extend into the space of the inner bulb 2.

Further, the inner bulb 2 is filled with a highly heat conductive gas.

Further, the inert gas is helium-oxygen mixed gas.

Further, a high thermal conductive gas is filled in a sealed space formed by the bulb body 1 and the inner bulb 2.

Further, the high thermal conductivity gas is a helium-oxygen mixture.

Claims (7)

1. The utility model provides a LED filament bulb shell with bubble structure in bubble, includes the cell-shell main part, characterized by, the inside bubble that is equipped with of cell-shell main part, cell-shell main part and interior bubble integrated into one piece, the cell-shell main part include bottom cell-shell and be located the material handle of sealing at top, form a confined space between bottom cell-shell and the interior bubble.

2. The envelope of the LED filament bulb with the structure of the bulb in the bulb as claimed in claim 1, wherein the sealing material handle is provided with a base, the diameter of the sealing material handle is reduced to be hermetically connected with the base, and an inner bulb space with an upward opening is formed inside the inner bulb.

3. The envelope of claim 2, wherein the base has a stem and a filament extending into the inner envelope space.

4. The LED filament bulb shell with the bulb-in-bulb structure as claimed in claim 3, wherein the inner bulb is filled with a high thermal conductivity gas.

5. The LED filament bulb shell with the bubble-in-bubble structure as claimed in claim 4, wherein the high thermal conductivity gas is a helium-oxygen mixture.

6. The envelope of claim 1, wherein the high thermal conductivity gas is filled in the sealed space formed by the envelope main body and the inner bulb.

7. The envelope of claim 6, wherein the high thermal conductivity gas is helium-oxygen mixture.

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