WO2012046367A1

WO2012046367A1 - Discharge lamp and illumination device

Info

Publication number: WO2012046367A1
Application number: PCT/JP2011/003735
Authority: WO
Inventors: 幸一片瀬; 文拓稲垣; 祐輔岡崎
Original assignee: パナソニック株式会社
Priority date: 2010-10-05
Filing date: 2011-06-29
Publication date: 2012-04-12
Also published as: JPWO2012046367A1; JP5180404B2; CN102576647A

Abstract

A discharge lamp (10) has a planar spiral-shaped luminous tube (11). The tube diameter (D2) of the luminous tube (11) is 18 mm to 22 mm, and the maximum outside diameter of rotation (D1) of the luminous tube (11) when seen in plan view is 250 mm to 270 mm. The discharge lamp (10) is turned on with a high frequency of 10 kHz or greater and a lamp power in the range of 58−70.5 W.

Description

Discharge lamp and lighting device

The present invention relates to a discharge lamp and an illuminating device, and more particularly, to a discharge lamp and an illuminating device including a discharge tube having a double winding shape in a plan view.

Conventionally, discharge lamps having an annular arc tube have been widely used for applications such as indoor lighting. In recent years, in addition to rated lighting, a discharge lamp having an annular arc tube dedicated for high-frequency lighting capable of high-power lighting has been proposed (for example, see Patent Document 1). With this lamp, the same light output as before can be obtained with less power when rated lighting (that is, it can be lit with high efficiency), and larger light with the same efficiency as before when lighting with high output. Output can be obtained.

In addition, in order to reduce the size, research has been conducted on a discharge lamp equipped with an arc tube having a shape swirling in a double spiral shape in plan view with the central portion of the tube as a swivel center (hereinafter referred to as a “planar spiral shape”). -It has been developed (see, for example, Patent Document 2).

Specifically, a planar spiral arc tube has a shape in which an arc tube whose discharge path extends in a long shape is swung on a virtual plane with the center in the longitudinal direction as a swivel center. Is filled with mercury (Hg) and a buffer gas (for example, argon gas (Ar)), and a phosphor layer is formed on the inner peripheral surface.

A discharge lamp having a flat spiral arc tube makes the discharge path length longer than that of a conventional discharge lamp having an annular arc tube by effectively using the inner region of the ring. be able to. Therefore, a discharge lamp having a planar spiral arc tube can achieve higher efficiency and higher light output at a certain size than a conventional discharge lamp having an annular arc tube. It is also possible to achieve downsizing.

Japanese Patent No. 3055769 Japanese Patent No. 40612263

However, in the market, for discharge lamps having an annular arc tube, those of various sizes and lamp powers are used depending on applications and appliances. In the technique proposed in Patent Document 2, It is difficult to provide a discharge lamp equipped with a flat spiral arc tube that can achieve both high efficiency and high light output while accommodating such various sizes.

The present invention has been made in order to solve the above-described problems, and is capable of achieving both high efficiency and high light output in comparison with the prior art, regardless of the size, while having a flat spiral arc tube. An object of the present invention is to provide a discharge lamp and a lighting device.

Therefore, the present invention employs the following configuration.

The present invention relates to a discharge lamp in which an arc tube whose both ends are hermetically sealed has a shape swirled in a double spiral shape in plan view with the central portion in the tube axis direction as the center of rotation. The diameter is 18 [mm] or more and 22 [mm] or less, and the maximum turning diameter when the arc tube is viewed in plan is 250 [mm] or more and 270 [mm] or less, and 58 [W] or more and 70.5 [W]. It is characterized by being lit at a lamp power within the following range and at a high frequency of 10 [kHz] or higher.

Further, an illumination device according to the present invention includes the discharge lamp according to the present invention.

In the discharge lamp and the illuminating device according to the present invention, the discharge path length can be increased by effectively using the inner region of the annular ring as compared with the discharge lamp having an annular arc tube that has been conventionally used. It is possible to achieve high light output or to reduce the size in the radial direction.

Further, in the discharge lamp and the lighting device according to the present invention, the size of the arc tube is individually specifically defined, and in correspondence with each size, the lamp power is specified within the above specified range, thereby increasing the Both efficiency and high light output can be achieved.

Therefore, the discharge lamp and the illuminating device according to the present invention include a planar spiral arc tube, and can achieve both high efficiency and high light output, regardless of the size.

The side view which shows the structure of the illuminating device 1 which concerns on embodiment. FIG. 2 is a side view showing a configuration of a discharge lamp 10 included in the lighting device 1. 1 is a plan view showing a configuration of a discharge lamp 10. FIG. The perspective view which shows the structure of the holder 12 and the nozzle | cap | die 121,122. FIG. 3 is a view showing a state in which an end of the arc tube 11 is inserted into the base 121, and is a view in which a part of the base 121 is cut away so that the inside of the base 121 can be seen. (A) The figure which looked at the cross section in the GG line in FIG. 5 from the arrow direction, and shows the state which is not filled with the silicone resin. FIG. 6B is a cross-sectional view taken along line GG in FIG. 5 as viewed from the direction of the arrow, and shows a state in which silicone resin is filled.

Hereinafter, an embodiment for carrying out the present invention will be described with an example. The form used in the following description is an example used to explain the configuration, operation, and effect of the present invention in an easy-to-understand manner. The present invention is not limited to the following form except for its essential features. Not receive.

[Embodiment]
1. Lighting device 1
The structure of the illuminating device 1 which concerns on embodiment is demonstrated using FIG.

As shown in FIG. 1, the lighting device 1 according to the present embodiment is, for example, a device that is directly attached to a ceiling 500, and a rosette (not shown) provided in a dotted shape 500. It is attached with a socket 22. The apparatus main body 20 of the illuminating device 1 is configured to include a bowl-shaped cage 21 that opens downward, an apparatus holder 23 attached to the bottom surface thereof, and a discharge lamp 10 attached to the apparatus holder 23.

The inner surface of the cap 21 is formed of, for example, a reflective surface, and reflects light emitted from the discharge lamp 10 to a desired range (for example, downward). The reflecting surface of the cap 21 can be constituted by, for example, a white coating film or by applying alumina particles. An electronic ballast (not shown) inserted in the power flow path between the commercial power source and the discharge lamp 10 is accommodated in the apparatus socket 22 of the apparatus main body 20. The electronic ballast is a high-frequency ballast that uses a series inverter system. This electronic ballast can apply a high frequency voltage having a frequency of 10 kHz or higher between the

caps

121 and 122 of the discharge lamp 10 described later.

2. Discharge lamp 10
The configuration of the discharge lamp 10 included in the illumination device 1 will be described with reference to FIGS. FIG. 2 is a side view of the discharge lamp 10, and FIG. 3 is a plan view of the discharge lamp 10.

As shown in FIG. 2, the discharge lamp 10 includes an arc tube 11 having a long discharge path, and a holder 12 for holding the arc tube 11 above (the side opposite to the light irradiation side). It is comprised. The holder 12 is provided with a pair of

caps

121 and 122 at the outermost part of the arc tube 11. In addition, in the arc tube 11, the central portion is bulged (the bulged portion 11a), and the bulged portion 11a is the coldest spot when the lamp is lit.

It should be noted that the coldest spot when the lamp is lit is not limited to being provided at the central portion, but may be provided at one end of the arc tube. In this case, for example, when an exhaust pipe is provided at one end of the arc tube 11 and the exhaust pipe is chip-off sealed, the coldest spot may be provided in the remaining exhaust pipe. . Furthermore, in the case where the exhaust pipe remaining portion is provided at one end of the arc tube 11, the side where the exhaust pipe residual portion is provided in order to facilitate the provision of the coldest spot in the exhaust pipe residual portion. The position of the filament may be provided so as to be closer to the center of the lamp than the position of the filament on the side where the exhaust pipe remainder is not provided.

As shown in FIG. 3, in the discharge lamp 10 according to the present embodiment, the arc tube 11 has a shape swirled in a double spiral shape in plan view with the substantially central portion in the longitudinal direction of the discharge path as the swivel center. Have. And the edge part of the arc_tube | light_emitting_tube 11 is distribute | arranged in the state which opposes an X-axis direction in the outermost periphery of rotation, and the nozzle | cap | die 121,122 is provided in each edge part. The arc tube 11 is turned with a maximum turning diameter D1 [mm].

FIG. 4 is a perspective view of the holder 12 and the

caps

121 and 122.

As shown in FIGS. 2 and 3, the holder 12 is one plate-like member that crosses the main surface opposite to the irradiation surface side of the arc tube 3 whose outline is a disc shape, and two caps are provided at both ends thereof. 121 and 122 are provided. Here, the holder 12 and the

bases

121 and 122 are integrated. However, for example, the holder and the base may be manufactured separately and then fixed to each other and integrated.

As shown in FIGS. 2 and 3, for example, the

caps

121 and 122 are electrically connected to the

fitting portions

123 and 124 fitted to the end portions of the arc tube 11 and a socket (not shown) on the lamp side. Receiving

base parts

125 and 126.

As shown in FIG. 4, the fitted

portions

123 and 124 have a substantially cylindrical shape with a space between the outer periphery of the end portions of the arc tube 11, and the holders are in a state where the directions of the openings are opposite to each other. 12 is provided.

When the base 121 and the arc tube 11 are fixed to the fitting portion 123 with a fixing member, for example, an adhesive such as silicone resin, an extra fixing member after filling the base 121 is attached to the base 121. There may be a notch 127 for guiding to the adjacent glass tube side in the radial direction (the side closer to the turning axis Y) (note that the fitted part 124 also has a notch, although not shown in the figure). You may do it.)

A regulating portion is provided inside the base 121, for example, on the inner peripheral surface of the base portion 125 and the fitted portion 123. Here, as an example of the restricting portion, it protrudes toward the central axis of the fitted portion 123 and extends along the fitted portion central axis direction (the direction in which the end portion on the base 121 side of the arc tube 11 is inserted). The plurality of ribs 128 are configured (see FIG. 6A).

As shown in FIG. 6A, the plurality of ribs 128 are three (indicated by 128 a, 128 b, 128 c) on the opposite side of the irradiated surface from the center of the fitted portion 123, and the irradiated surface from the center. A total of six (indicated by 128d, 128e, and 128f) are formed on the side. Note that six ribs are also formed on the fitted portion 124 side.

Here, the total number of the ribs 128 is six, but the end of the arc tube may be positioned to some extent, and the number is not particularly limited. However, when using a circular arc tube having a circular cross-sectional shape, it is easier to position the end of the arc tube if there are three or more.

The

base parts

125 and 126 are provided on the side opposite to the opening side of the fitted

parts

123 and 124.

As shown in FIG. 4, the base 125 includes a so-called G type (for example, G5 type) having a bottomed cylindrical base main body 129 and a pair of

pins

130 a and 130 b provided on the bottom wall of the base main body 129. Etc.). Similarly, the base part 126 is a G type having a base part main body 131 and a pair of

pins

132a and 132b.

The pair of

pins

130a and 130b of the base part 125 and the pair of

pins

132a and 132b of the base part 126 extend in the swivel direction at the end of the arc tube 11, and extend in opposite directions to each other. The direction in which 130b, 132a, and 132b are arranged is the turning axis Y direction as shown in FIG.

As shown in FIG. 4, the holder 12 has a rectangular plate shape (rectangular shape in plan view), and is provided with

bases

121 and 122 at both ends in the longitudinal direction.

Support holders

133 and 134 that support the arc tube 11 may be formed on the holder 12.

The support protrusions 133 and 134 are formed across both ends of the holder 12 in the short direction as shown in FIG. In addition, the end of the arc tube 11 in the holder 12 where the end is inserted (the end on the base side) protrudes from the irradiated surface side of the holder 12 and extends along the edge of the holder 12, thereby supporting protrusions. A connection protrusion 135 connected to one end of 133 is formed. Note that the connection protrusion 134 may exist not only on the base 121 side but also on the base 122 side.

FIG. 6 is a view showing a state in which the end of the arc tube 11 is inserted into the base 121, and a part of the base 121 is cut away so that the inside of the base 121 can be seen.
6A is a view of the cross section taken along the line GG in FIG. 5 as seen from the direction of the arrow before the fixing member is filled, and FIG. 6B is a cross-sectional view taken along the line G-G in FIG. It is the figure which looked at the state after the cross-section in G line was filled with the sticking agent from the arrow direction.

In the state where the end portion of the arc tube 11 is inserted into the base 121, as shown in FIG. 6A, the outer periphery (11 a) of the end portion of the arc tube 11 has a fitting portion 123 and a base portion main body 129. Further, a portion (11 b) adjacent to the base 121 in the arc tube 11 is supported by a support protrusion 133.

Returning to FIG. 5, the pair of lead wires 137 extending from the end of the arc tube 11 passes through the inside of the pin 130b attached to the bottom of the base body 129, and is fixed by solder or the like at the tip of the pin 130b. Has been. Note that the pin 130b in FIG. 5 is not shown in cross section, and the connection between the pin 130a and the lead wire 136 is omitted for convenience of drawing, but is the same as the connection with the pin 130b and the lead wire 137.

As shown in FIG. 6B, the arc tube 11 and the

caps

121 and 122 are fixed to each other, for example, a fixing member filled between the cap 7 and the end portion 13 of the arc tube 3, such as a silicone resin 128. It is done by. At this time, the inner glass tube 19 b adjacent to the fitted portion 123 is also fixed to the holder 12 by the silicone resin 138.

In addition, as the

bases

121 and 122 and the holder 12, those having various structures can be adopted.

Returning to FIG. 3, as shown in the portion surrounded by the two-dot chain line in FIG. 3, the arc tube 11 has a glass tube sealed at both ends, and the internal space (discharge space) 11 b contains mercury ( Hg) and a buffer gas (for example, argon gas) are sealed at a pressure of 400 [Pa], for example. The encapsulated mercury may be in a simple substance form or in an amalgam form such as zinc mercury, silver mercury, bismuth / indium mercury.

Although not shown, this discharge lamp is, for example, a fluorescent lamp. In this case, a phosphor layer is formed on the inner peripheral surface of the arc tube 11. The phosphor layer is formed, for example, by firing a material containing a rare earth phosphor, and contains Y2O3: Eu, LaPO4: Ce, and BaMg2Al16O27: Eu, Mn.

Also, electrodes are provided at each end of the arc tube 11 (not shown). The electrode is, for example, of a bead glass mount type, and includes a tungsten (W) filament coil, a pair of lead wires that support the filament coil, and a bead glass that fixes and supports the pair of lead wires. Become.

The glass tube that is a constituent element of the arc tube 11 is made of, for example, barium strontium silicate glass (lead-free glass, soft glass). And the cross section of the glass tube is carrying out the substantially circular shape.

The thickness of the arc tube 11 is represented by ((D2-D3) / 2), and is, for example, 0.8 [mm] to 1.2 [mm].

3. Lamp power and each dimension In the illuminating device 1 which concerns on embodiment, the relationship between the lamp power in the discharge lamp 10 and each dimension is demonstrated. As shown in FIG. 3, the tube diameter D2, the maximum turning diameter D1, and the lamp power of the arc tube 11 in the discharge lamp 10 are defined as follows.
(1) 63 [W] type Pipe diameter D2 = 18 [mm] to 22 [mm]
Maximum turning diameter D1 = 250 [mm] to 270 [mm]
Lamp power: 63 [W]
In addition, the lamp electric power in this type should just be in the range of 58 [W] or more and 70.5 [W] or less.

4). Discharge lamp 10 and superiority of lighting device 1 including the same In discharge lamp 10 according to the present embodiment and lighting device 1 including the same, compared with a discharge lamp having an annular arc tube that has been conventionally used, By effectively using the inner region of the ring, the discharge path length can be lengthened, high light output can be realized, or the size in the radial direction can be reduced.

Further, in the discharge lamp 10 and the lighting device 1, the sizes (tube diameter D2 and maximum turning diameter D1) of the arc tube 11 are specifically defined, and the lamp power is within the above range in correspondence with each size. Regardless of the lamp size, it is possible to achieve both high efficiency and high light output.

Therefore, the discharge lamp 10 and the illumination device 1 according to the present embodiment can be adapted to various sizes and include both the efficiency and light output at each size, while including the flat spiral arc tube 11. .

[Confirmation]
The superiority will be confirmed using (Table 1) and (Table 2).

(Table 1) shows the results of checking the lamp current, the total luminous flux and the efficiency for each type of the discharge lamp 10 according to the above embodiment. Moreover, (Table 2) is the result of having performed the same measurement for every type about the discharge lamp which has a conventional annular | circular shaped arc tube so that it may respond | correspond to (Table 1). This measurement was performed by lighting a discharge lamp by applying a high frequency voltage having a frequency of 10 [kHz] or more between the electronic ballast to the

caps

121 and 122 of the discharge lamp 10. Specifically, the discharge lamp was turned on by applying a high frequency voltage of 45 [kHz], but it was confirmed that the same tendency was observed when a high frequency voltage of 10 [kHz] or higher was applied.

As shown in Table 1, in the discharge lamp according to Example 1, the tube diameter D2 is 20 [mm], the maximum turning diameter D1 is 250 [mm], and the lamp power P is 58 [W]. In this discharge lamp, the total luminous flux is 6050 [lm], and the efficiency is 104 [lm / W].

On the other hand, as shown in Table 2, in any of the discharge lamps of Comparative Examples 1 to 8, the total luminous flux is 5480 [lm] or less, and the efficiency is 101 [lm / W] or less.

From the above, it can be seen that the discharge lamp according to Example 1 can achieve both high total luminous flux and high efficiency for any of the discharge lamps of Comparative Examples 1 to 8 shown in Table 2.

Similarly, as shown in Table 1, in the discharge lamp according to Example 2, the tube diameter D2 is 20 [mm], the maximum turning diameter D1 is 253 [mm], and the lamp power P is 60 [W]. In this discharge lamp, the total luminous flux is 6300 [lm], and the efficiency is 105 [lm / W].

Further, in the discharge lamp according to Example 3, the tube diameter D2 is 20 [mm], the maximum turning diameter D1 is 258 [mm], and the lamp power P is 63 [W]. In this discharge lamp, the total luminous flux is 6620 [lm], and the efficiency is 105 [lm / W].

Further, in the discharge lamp according to Example 4, the tube diameter D2 is 20 [mm], the maximum turning diameter D1 is 263 [mm], and the lamp power P is 66 [W]. In this discharge lamp, the total luminous flux is 6930 [lm], and the efficiency is 105 [lm / W].

Further, in the discharge lamp according to Example 5, the tube diameter D2 is 20 [mm], the maximum turning diameter D1 is 270 [mm], and the lamp power P is 70 [W]. In this discharge lamp, the total luminous flux is 7410 [lm] and the efficiency is 106 [lm / W].

Further, in the discharge lamp according to Example 6, the tube diameter D2 is 21 [mm], the maximum turning diameter D1 is 250 [mm], and the lamp power P is 57.5 [W]. In this discharge lamp, the total luminous flux is 6050 [lm], and the efficiency is 105 [lm / W].

In the discharge lamp according to Example 7, the tube diameter D2 is 19 [mm], the maximum turning diameter D1 is 270 [mm], and the lamp power P is 70.5 [W]. In this discharge lamp, the total luminous flux is 7410 [lm], and the efficiency is 105 [lm / W].

In the discharge lamps according to Examples 2 to 7, a higher total luminous flux than that of the discharge lamp according to Example 1 can be obtained, and an efficiency of 105 [lm / W] can be obtained. Therefore, Examples 2-7 can achieve both high total luminous flux and high efficiency for any of the discharge lamps of Comparative Examples 1-8 shown in Table 2.

Therefore, the discharge lamp 10 and the lighting device 1 according to the present embodiment are provided with the flat spiral arc tube 11 and correspond to various sizes, and are conventional discharge lamps (discharge lamps according to Comparative Examples 1 to 8). On the other hand, both the efficiency and the light output at each size can be increased.

[Other matters]
The above embodiment shows an example of the present invention, and the present invention is not limited to this except for the essential configuration. For example, an example of the constituent material of the discharge lamp 10 has been described above, but it is possible to appropriately change it so as to conform to various standards.

Further, as shown in FIG. 3, in the discharge lamp 10 according to the above embodiment, the number of windings of the glass tube is about 7/4, but not limited to this, various types can be used. In addition, it is preferable that the winding frequency | count of a glass tube exists in the range of 1.5 times or more and 1.65 times or less. In this case, it is possible to facilitate the processing of the glass tube. Furthermore, the number of windings of the glass tube is more preferably in the range of 1.55 to 1.6.

The number of turns of the glass tube is the number of rotations obtained by rotating the tube axis X of the central portion of the glass tube from the central portion of the glass tube to each end until the rotation axis Y of the glass tube is the rotation axis. It is expressed.

Further, as shown in FIG. 2, the length L of the discharge lamp 10 in the direction of the axis of rotation of the glass tube is preferably 36 [mm] or less. In this case, it can make it easy to adapt to a lighting fixture. Furthermore, the length L is more preferably in the range of 25 [mm] to 36 [mm]. In this case, it is easy to manufacture the lamp, and it can be easily adapted to a thin lighting fixture.

Further, as shown in FIG. 3, the distance M between the bases of the pins of each base is preferably in the range of 63.5 [mm] or more and 64.5 [mm] or less. In this case, attachment to a lighting fixture can be facilitated.

Further, as shown in FIG. 3, in the discharge lamp 10 according to the above embodiment, the cross-sectional shape of the glass tube is circular, but it may be elliptical or oval. In this case, for the “tube diameter D2”, the major axis and the minor axis corresponding to the above can be defined.

Further, in the above embodiment, the configuration in which the phosphor layer is formed on the inner peripheral portion of the arc tube 11 is taken as an example, but the formation of the phosphor layer is not necessarily an essential requirement.

In the present invention, “˜” indicating a numerical range includes numerical values at both ends.

INDUSTRIAL APPLICABILITY The present invention is useful for realizing a discharge lamp and an illuminating device that include a flat spiral arc tube and can achieve both high efficiency and high light output regardless of the size.

1. Illumination device 10. Discharge lamp 11. Arc tube 12. Holder 20. Device main body 21. Casa 22. Device socket 23. Device holder 121,122. Base 500. ceiling

Claims

An arc tube having both ends hermetically sealed is a discharge lamp having a shape swirled in a double spiral shape in plan view with the center in the tube axis direction as a swivel center,
The tube diameter of the arc tube is 18 [mm] or more and 22 [mm] or less,
The maximum turning diameter when the arc tube is viewed in plan is 250 [mm] or more and 270 [mm].
]
A discharge lamp characterized by being lit at a lamp power within a range of 58 [W] or more and 70.5 [W] or less and at a high frequency of 10 [kHz] or more.
Mercury and buffer gas are sealed in the inner space of the arc tube,
Electrode bodies that receive power supply and emit electrons are provided at both ends of the arc tube,
The discharge lamp according to claim 1, wherein a phosphor layer that converts ultraviolet light into visible light is provided on an inner peripheral surface of the arc tube.
A discharge lamp according to claim 1;
A lighting fixture to which the discharge lamp is attached;
A lighting device comprising: