KR20040078094A - Electrical apparatus - Google Patents

Abstract

PURPOSE: An electrical apparatus is provided to prevent an early breakdown of electrolytic capacitor and lengthen the useful life of the apparatus by arranging the electrolytic capacitor on a circuit board so as to be shielded from electronic components. CONSTITUTION: An electrical apparatus(7) comprises a circuit board(30); and a case(4) for accommodating the circuit board. The circuit board includes an electrolytic capacitor(34) and electronic components made of a resin material containing halogen compounds. The electrolytic capacitor is arranged to be shielded from the electronic components. The electrolytic capacitor is shielded from the electronic components by a coating of a shielding member at an end of seal portion of the electrolytic capacitor.

Description

ELECTRICAL DEVICE {ELECTRICAL APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric apparatus containing a circuit board on which an electronic component using an electrolytic capacitor and a synthetic resin material is mounted in a case.

BACKGROUND ART Electrical apparatuses such as a discharge lamp lighting apparatus used for a lighting apparatus are formed by mounting an electronic component on a circuit board on which a wiring pattern is printed on the substrate. In particular, as the discharge lamp lighting device is converted to an inverter using an electronic component, the weight and size of the discharge lamp lighting device are significantly reduced compared to an electric device using a conventional iron core coil as a current limiting element.

Electrical equipment using electronic components, for example, as described in Japanese Patent Application Laid-Open No. 8-329731, is generally configured by housing a circuit board on which an electronic component is mounted to protect and insulate from the outside. In some cases, the temperature may exceed 70 ° C due to heat generation of the electronic components. Therefore, the electric apparatus of the related art divides the mounting area of the circuit board by the heat shielding means, and the heat generating parts and the non-heating parts of the electronic parts are arranged in separate areas, thereby reducing the thermal effect of the electronic parts. have.

As miniaturization proceeds, such an electric device tends to increase in temperature in the case more and more, and even if the case is partitioned by the heat shielding means in the case as in the prior art, it is impossible to prevent all the thermal effects of the electronic component.

Therefore, it is necessary to use the electronic component with high heat resistance temperature for an electronic component. In particular, in order to prevent the electronic parts from burning and fuming when the temperature rises excessively in the case due to an abnormality in an electric device or the like, a flame retardant made of a synthetic resin material used for the electronic parts is made of halides or the like. Adding agent is generally done.

By the way, excessive temperature rise in the casing of the electrical equipment may destroy the electronic components used for a long time, and the electrical equipment may reach the end of its service life.However, the electrical equipment is usually damaged by the destruction of parts not related to the thermal effect. In some cases, the service life was reached earlier. That is, among the electronic components, the charging characteristics of the electrolytic capacitor are completely different from those due to thermal effects, and thus the function as a capacitor may not be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric device with a long life by preventing the electrolytic capacitor from being destroyed even if the electrolytic capacitor is provided in the case.

1 is a cross-sectional view showing a first embodiment of an electric machine of the present invention.

2 is a plan view of a circuit board housed in an electric machine of the first embodiment.

3 is an enlarged front view of an electrolytic capacitor housed in an electric device of the first embodiment.

Fig. 4 is an enlarged front view of the resonant film capacitor housed in the electric device of the first embodiment.

5 is a front view of an electrolytic capacitor housed in an electric apparatus according to a second embodiment of the present invention.

6 is a front view of an electrolytic capacitor housed in an electric apparatus according to a third embodiment of the present invention.

7 is an enlarged cross-sectional view of a part of an electric apparatus according to a fourth embodiment of the present invention.

8 is an enlarged cross-sectional view of a part of an electric apparatus according to a fifth embodiment of the present invention.

9 is an enlarged cross-sectional view of a part of an electric apparatus according to a sixth embodiment of the present invention.

10 is an enlarged cross-sectional view showing a part of an electric apparatus according to a seventh embodiment of the present invention.

<Description of main parts of drawing>

4: case 5: cover

5a, 6a, 30a: Ventilation hole 5b: Shield

7: electric equipment 30: circuit board

32: film capacitor as electronic component 32a: mold part

32b: lead wire 34: electrolytic capacitor

34a: main body 34c: sealing rubber

34d: shielding means

38 cooling means as a low temperature component 39 heat radiation fin

As a result of analyzing the electrolytic capacitor destroyed early, the present inventors found that the electrode foil or the terminal inside the electrolytic capacitor corroded, the electrolyte leaked out due to this corrosion, and the function of the electrolytic capacitor was stopped.

From this electrolytic capacitor, bromine (Br) was detected at the concentration of 3PPM when the leaking electrolyte was analyzed to investigate why the electrolyte began to leak. It is thought that this bromine penetrates from the sealing end of the electrolytic capacitor and bromine is ionized in the electrolytic solution in which dislocation has occurred, thereby corroding the electrode made of aluminum by the following chemical reaction.

2Al + 6HBr-> 2AlBr ₃ + 3H ₂

Due to this corrosion, the pressure inside the electrolytic capacitor rises, the explosion-proof valve of the electrolytic capacitor is activated, and it can be estimated that the electrolyte starts to leak.

This corrosion phenomenon occurred when a relatively low cost sealing rubber was used at the end of the sealing portion of the electrolytic capacitor. When the sealing rubber was analyzed, bromine was also detected from the sealing rubber, and since the concentration of detection increased from the outside to the inside of the electrolytic capacitor, bromine existing outside the electrolytic capacitor diffused into the sealing rubber, It seems to have moved inside.

Next, when the source of this bromine was examined, it was confirmed that it was an electronic component provided on the circuit board. That is, the epoxy resin used in the film capacitor, which is an electronic component, contains a halide as a flame retardant, and the halide hexabromobenzene (C ₆ Br ₆ ) is gradually sublimed under a long time heating condition, and the outside of the epoxy resin It was estimated that the fluoride was released as a gas component (or decomposed into a low molecular weight bromine compound and released as a gas component to the outside), and the bromine compound was released from an electronic component and moved to the end of the sealing portion of the electrolytic capacitor.

To support this estimation, a combination circuit board of electronic components and electrolytic capacitors using a synthetic resin (so-called non-halo resin) having a halogenated content of flame retardant of 1.0% by mass or less in bromine conversion is formed. When housed in a case and operated, no electrolyte leakage based on corrosion of the electrolytic capacitor was generated. In addition, bromine was not recognized in the electrolyte or the sealing rubber inside the electrolytic capacitor at the end of its life.

In addition, the lower the content of the halide which is a flame retardant, the higher the corrosion inhibitory effect. Therefore, assuming that the electronic component becomes extremely high temperature, the content of the halide which is a flame retardant is preferably 0.1% by mass or less in terms of bromine. .

By the way, "the content of halide is 1.0 mass% or less in bromine conversion" is as follows. That is, the synthetic resin of the sample to be measured is burnt and gasified, the gas is dissolved in water, and then the number of moles of bromine ions contained in each volume is measured by ion chromatography. Next, the weight is calculated by multiplying the atomic weight of bromine, and the value obtained by determining the percentage which makes the weight of the sample a denominator is 1.0% or less.

Examples of the resin material used for the electronic component include phenolic resins, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polycarbonate (PC), and the like, in addition to epoxy resins.

Moreover, flame retardant resins, such as PBT, PET, PC, an acrylonitrile butadiene styrene copolymer (ABS), polystyrene, are used also for the material of the welding agent which covers a circuit in many cases.

In addition, as a flame retardant contained in this resin material, and a halide which may cause corrosion to an electrolytic capacitor, for example, as an addition type halogen-based flame retardant, hexabromobenzene (C ₆ Br ₆ ), pentabromo As the benzene, tetrabromochlorobenzene, or tribromobisphenol (TBA), or a halogen-based flame retardant of a polymer type, a relatively high molecular weight bromine compound such as brominated polycarbonate, brominated epoxy, or styrene bromide is used. Although these organic bromine compounds are not easily released to the outside in a normal environment, they are gradually decomposed to low molecular weight bromine compounds such as tribromophenol and dibromophenol in high temperature or high humidity environment, and then hexabromobenzene and Likewise, it is easy to be sublimated to the outside, and in such a case, it is thought that the use environment can be sufficiently endured by studying the use environment.

The electrical apparatus of claim 1 has an electronic component in which an electrolytic capacitor and a resin material containing halide are used, and the electrolytic capacitor has a circuit board mounted so as to be shielded from the electronic component, and a case covering the circuit board. It is done. Electronic components made of synthetic resins (so-called flame-retardant resins) having a halogenated flame retardant content of more than 1.0 mass% in terms of bromine may destroy electrolytic capacitors as described above, but electronic components using non-halo resins are very common. Therefore, the cost is considered to be increased, and the electronic part may not comply with the flame retardant grade in the conditions of use of the electric equipment. Therefore, even when the electronic component using the flame-retardant resin and the electrolytic capacitor are combined, it is necessary to find a means in which the electrolytic capacitor is not destroyed.

The process of destroying the electrolytic capacitor was estimated by the above, and it was confirmed that the electrolytic capacitor was not destroyed prematurely by leakage of the electrolyte solution if the low molecular weight bromine compound decomposed from the halide or the halide did not diffuse into the electrolytic capacitor. . In other words, by providing an electrolytic capacitor and a means for shielding the electronic component, it is possible to prematurely destroy the electrolytic capacitor if the halide or the low molecular weight compound decomposed from the halide is prevented from diffusing into the electrolytic capacitor.

According to the invention of claim 1, since the electrolytic capacitor is provided on the circuit board so as to be shielded from the electronic components, premature destruction of the electrolytic capacitor can be suppressed, and the short life of the electric equipment can be prevented.

Claim 2 is an electric device of Claim 1, characterized in that the electrolytic capacitor is shielded from the electronic component by covering the shielding means at the end of the sealing portion. As the shielding means, it is applicable as long as the low molecular weight compound is difficult to diffuse and can insulate the electrolytic capacitor. For example, metals such as aluminum, in addition to synthetic resin materials such as silicone resin, urethane, vinylene chloride, Glass, ceramics, and the like.

According to the invention of claim 2, since the shielding means is coated at the end of the sealing portion, the diffusion of the low molecular weight compound decomposed from the halide into the electrolytic capacitor can be suppressed, and the short life of the electric device can be prevented.

Claim 3 is an electric device of Claim 1, characterized in that the electrolytic capacitor is shielded from the electronic component by the end of the sealing portion coming into contact with or in contact with the circuit board. When the sealing end of the electrolytic capacitor is in contact with the circuit board, the low molecular weight compound is less likely to penetrate, and there is no need to provide a shielding means. In addition, even if the circuit board is not in contact with the circuit board, or close to a distance of 1.0 mm or less, relatively low molecular weight compounds are less likely to penetrate, and thus the effect of suppressing diffusion in the electrolytic capacitor has been recognized.

According to the invention of claim 3, since the end of the sealing portion is in close proximity or contact with the circuit board, the low molecular weight compound decomposed from the halide is prevented from diffusing into the electrolytic capacitor without providing a shielding means. Short life can be prevented.

Claim 4 is characterized in that the electric device electrolytic capacitor according to claim 1 is shielded from an electronic component by arranging a shield around it. The shielding body may cover the entire periphery of the electrolytic capacitor, or may cover only the sealing end of the electrolytic capacitor. The shielding body needs to be made of a material which is difficult to diffuse low molecular weight compounds decomposed from halides. For example, metals such as aluminum, glass and ceramics, in addition to synthetic resin materials such as silicone resin, urethane and vinylene chloride And the like. This shield may be integrated with a circuit board or may be integrated with a cover. In addition, the electrolytic capacitor may be shielded by providing it on a circuit board or cover.

According to the invention of claim 4, since the electrolytic capacitor is shielded by the shielding body, the diffusion of the low molecular weight compound decomposed from the halide into the electrolytic capacitor can be reliably suppressed, and the short life of the electric device can be prevented.

Claim 5 is the electric machine according to any one of claims 1 to 4, wherein the halide is hexabromobenzene (C ₆ Br ₆ ). It can be seen that bromine ions causing corrosion of the electrolytic capacitor are mostly emitted from hexabromobenzene as a low molecular bromine compound, and the present invention can achieve a remarkable effect in a synthetic resin containing hexabromobenzene as a flame retardant. .

In the case of hexabromobenzene, since it is easy to discharge to the outside in the form as it is, and is emitted to the atmosphere without decomposing at a relatively low temperature, most of the flame retardants used for circuit components have an adverse effect on the electrolytic capacitor. However, flame retardants containing hexabromobenzene are often used because they are relatively inexpensive and can reduce the cost of the entire electrical equipment.

According to the invention of claim 5, since the halide is hexabromobenzene, the effect of the invention of claims 1 to 4 is remarkable.

Claim 6 is characterized in that, in the electric machine according to any one of claims 1 to 5, the temperature of the circuit board when the electric machine is operating is 70 ° C or higher. It has been confirmed that the low molecular weight compound of the halide added as a flame retardant to the resin material has a higher emission amount as the temperature is higher, and the emission amount sufficient to cause corrosion in the electrolytic transistor when the temperature of the circuit board is 70 ° C or higher.

According to the invention of claim 6, since the temperature of the circuit board is 70 DEG C or more, the effect of the invention of claims 1 to 5 is remarkable.

Claim 7 is characterized in that the volume in the electrical equipment case according to any one of claims 1 to 6 is 100 cm 3 or less. The low-molecular-weight compound of the halide diffuses in the case, and even if the discharge amount is constant, the smaller the volume in the case is, the higher the concentration becomes. Therefore, the smaller the volume in the case, the higher the probability of corrosion of the electrolytic capacitor. This phenomenon has a volume of 100 cm 3 in the case. It was confirmed that it becomes especially remarkable when it is below.

According to the invention of claim 7, the volume in the case is 100 cm 3. Since it is below, the effect of the invention of Claims 1-6 is remarkable.

Claim 8 is an electric machine according to any one of claims 1 to 7, wherein the circuit board is a high frequency inverter for lighting a discharge lamp.

According to invention of Claim 8, the electric device as a high frequency inverter for lighting a discharge lamp provided with the action of Claims 1-7 can be provided.

[Embodiment of the Invention]

EMBODIMENT OF THE INVENTION Hereinafter, Embodiment 1 of the electric device of this invention is described with reference to FIGS.

1 is a cross-sectional view showing a first embodiment of an electric apparatus of the present invention, and FIG. 2 is a plan view of a circuit board housed in an electric apparatus of the same form. As shown in FIG. 1, the electric device 7 includes a case 4 that houses a circuit board 30 provided with electronic components.

The case 4 is made of, for example, an aluminum plate material, and is made of a rectangular cover, a box-shaped cover 5 with one side opened, and a bottom case 6 with a rectangular shape and one side opened. 5 is attached to the side surface 6a of the bottom case 6, respectively. In addition, a substantial vent hole is not formed in this case 4.

As shown in Fig. 2, the circuit board 30 constitutes a discharge lamp lighting device by an inverter circuit, and includes a resonant transformer 31, a resonant film capacitor 32, and a heat dissipation member that is a switch element of the inverter. 33, a smoothing electrolytic capacitor 34, and the like are provided. 35 is a high-lit IC, in which two or more different types of components, such as a capacitor, a resistor, a transistor, and the like, are mixed and directly mounted on the substrate 16, and are insulated with an epoxy resin having heat resistance.

3 is an enlarged front view of the electrolytic capacitor 34. In the electrolytic capacitor 34, a pair of lead wires 34b and 34b are drawn out of the main body 34a, and the sealing rubber 34c made of butyl rubber is disposed at the lower end of the main body 34a. The electrolytic solution and the like inside the electrolytic capacitor 34 are sealed by 34c.

4 is an enlarged front view of the resonant film capacitor 32. This capacitor 32 has a dielectric film therein and is covered with a mold portion 32a made of epoxy resin. A pair of lead wires 32b and 32b are led out from the mold portion 32a. An epoxy resin of the molded portion (32a) is a Mo-hexahydro-bromo benzene (C ₆ Br ₆₎ based resin, the so-called nonpareil does not contain a halide such as. In addition, the halide is not contained in the synthetic resin used for other electronic components.

In the electric apparatus 7 of this embodiment, when a power supply is turned on, the electronic component installed in the circuit board 30 will start operation | movement, such as switching, and an electronic component will generate | generate self. Then, the temperature in the case 4 rises, and the temperature of the circuit board 30 exceeds 100 ° C. However, even if the operation of the electric equipment is continued for a long time, the electrolytic capacitor 34 has not been destroyed by the cause of leakage of the electrolyte or the like.

On the other hand, the electrical apparatus of the comparative example which used the so-called flame-retardant epoxy resin containing 2.0 mass% of hexabromobenzene in bromine conversion in the mold part 32a of the resonant film capacitor 32 delivers after 1000 hours from the start of operation. The capacitor | condenser 34 was destroyed by the electrolyte leakage, and the operation | movement of an electrical device stopped. Analysis of the electrolytic solution of the electrolytic capacitor used in the electrical apparatus of this comparative example showed that 10 PPM and a very small amount of hexabromobenzene were detected in the bromine (Br) concentration. However, even a small amount of hexabromobenzene is an electrolytic capacitor (34). In the case of diffusion inside, it was found that the characteristics of the electrolytic capacitor were lowered and the function was impaired.

The inclusion of hexabromobenzene in the resin material can be determined by gas chromatography or a thermal decomposition mass spectrometer. This is because hexabromobenzene is easily evaporated by sublimation or the like, but the molecular structure is relatively hard to be broken unless it is compared with a situation such as applying a voltage.

Next, 2nd Embodiment is described. 5 is a front view of an electrolytic capacitor housed in an electric apparatus according to the second embodiment.

In this embodiment, like the comparative example of 1st Embodiment, the so-called flame-retardant epoxy resin containing 2.0 mass% of hexabromobenzene in bromine conversion used the film capacitor 32 used for the mold part 32a. .

In the electrolytic capacitor 34, urethane resin is coated as a shielding means 34d at the end of the sealing portion of the electrolytic capacitor main body 34a including the sealing rubber 34c. As a result, even when bromine compounds decomposed from hexabromobenzene or hexabromobenzene are released from the mold portion 32a of the film capacitor 32, the diffusion of these substances into the electrolytic capacitor 34 is suppressed, thereby preventing the electrical equipment. The short life of (7) can be prevented.

Next, a third embodiment will be described. 6 is a front view of an electrolytic capacitor housed in an electric apparatus according to the third embodiment.

In this embodiment, even if the sealing end of the electrolytic capacitor 34 is in contact with the circuit board 30, and thus the bromine compound decomposed from hexabromobenzene or hexabromobenzene is released, these substances are contained in the electrolytic capacitor ( Diffusion into 34 is suppressed, and the short life of the electric device 7 can be prevented.

Next, a fourth embodiment will be described. FIG. 7 is an enlarged cross-sectional view of a part of the electric apparatus according to the fourth embodiment. FIG.

In this embodiment, the vent holes 5a, 6a and () are provided in the cover 5, the bottom case 6 and the circuit board 30 of the case 4 so that the vent holes are formed around the electrolytic capacitor 34. 30a) was prepared separately. These vent holes 5a, 6a, 30a each have a positional relationship in which they pass in the longitudinal direction, and the electrolytic capacitor 34 and the film capacitor 32 interpose the vent holes 5a, 6a, 30a. The circuit board 30 is disposed so as to be spaced apart from each other. Thus, since the vent holes 5a, 6a, 30a are provided between the electrolytic capacitor 34 and the film capacitor 32, even if bromine compounds decomposed from hexabromobenzene or hexabromobenzene are released, The substance is released to the outside from the vent holes 5a, 6a, and 30a, and the diffusion of the substance into the electrolytic capacitor 34 is suppressed, so that the short life of the electric device 7 can be prevented.

Next, a fifth embodiment will be described. FIG. 8 is an enlarged cross-sectional view of a part of an electric apparatus according to a fifth embodiment. FIG.

In this embodiment, the cylindrical shield 5b is integrally provided on the inner surface of the cover 5 of the case 4. When the cover 5 is fitted to the bottom case 6, the lower end of the shield 5b is in contact with the circuit board 30, and the entire electrolytic capacitor 34 is covered. As a result, even when bromine compounds decomposed from hexabromobenzene or hexabromobenzene are released, the diffusion of these substances into the electrolytic capacitor 34 in the shield 5a is suppressed, thereby preventing short life of the electric apparatus 7. You can do it.

Next, a sixth embodiment will be described. 9 is an enlarged cross-sectional view of a part of an electric apparatus according to a sixth embodiment.

In this embodiment, the electrolytic capacitor 34 is provided on the circuit board 30 so that the sealing end part direction becomes a direction which does not arrange the film capacitor 32. At this time, the sealing end of the electrolytic capacitor 34 and the film capacitor 32 are preferably 5 cm or more apart, and more preferably 10 cm or more apart. As a result, halides or low molecular weight compounds decomposed from halides are less likely to diffuse into the electrolytic capacitor 34, and the short life of the electric device can be prevented.

Next, a seventh embodiment will be described. FIG. 10 is an enlarged cross-sectional view showing a part of an electric apparatus according to a seventh embodiment. FIG.

In this embodiment, the cooling means 38 as a low temperature component is provided between the electrolytic capacitor 34 and the film capacitor 32. The cooling component 38 is made of aluminum, and a heat radiation fin 39 is provided at one end thereof. In addition, the heat radiation fins 39 are disposed outside the cover 5. Thus, by providing the cooling means 38 between the electrolytic capacitor 34 and the film capacitor 32, the bromine compound decomposed from hexabromobenzene or hexabromobenzene is replenished to the cooling means 38. As a result, the diffusion of these substances into the electrolytic capacitor 34 can be suppressed, and the short life of the electric device 7 can be prevented. In addition, although the electronic component using the resin material containing hexabromobenzene was demonstrated as a film capacitor as said embodiment, this invention is not limited to this, The resin material of all the electronic components arrange | positioned in the case 4 It is a target.

Next, an eighth embodiment will be described. The electric machine of this embodiment has a structure basically the same as the discharge lamp lighting apparatus shown to FIG. 1 thru | or 4 of 1st Embodiment, and a different structure is demonstrated here with reference to FIGS. Otherwise, detailed description thereof will be omitted.

The electric machine is, for example, a discharge lamp lighting device, and includes an electrolytic capacitor 34, an inverter circuit section including a resonant film capacitor 32 and an transistor 33, which are electronic components using a polymer halogen-based flame retardant. It is comprised by the circuit board 30 provided and the case which accommodates this. The electrolytic capacitor 34 is composed of a main body 34a, an ethylene glycol-based electrolyte solution (not shown) and an electrode (not shown) provided in the main body, and a sealing rubber 34c mainly formed of butyl rubber. Consists of.

When the discharge lamp such as a fluorescent lamp is turned on by the discharge lamp lighting device, the discharge lamp has a life span of about 10000 hours and can be used even if it is replaced by a new discharge lamp. Therefore, an electrolytic capacitor filled with a relatively long life ethylene glycol-based electrolyte solution is used. Was used. In this case, it is necessary to suppress that halogen ions penetrating into the electrolytic solution corrode the electrode of the electrolytic capacitor, thereby reducing the life of the electrolytic capacitor.

Polymeric halogen-based flame retardants are brominated polycarbonate, brominated epoxy, or styrene bromide, and are usually not easily released to the outside under normal circumstances. The emission of halogen gas can be sufficiently suppressed.

In view of the above, in the present embodiment, butyl, which is a sealing rubber that is hard to penetrate into the electrolytic capacitor while being discharged, uses an electronic component made of a polymer-type halogen-based flame retardant which is less likely to emit halogen gas in the case even at a relatively high ambient temperature. It is to use rubber. As a result, the life of the electrolytic capacitor is extended, and the life of the discharge lamp lighting device can be extended.

Next, a ninth embodiment will be described. The electric machine of this embodiment changes the polymer type halogen type flame retardant to the additive type halogen type flame retardant in the electronic component of 8th Embodiment, and since the other structure is basically the same, the detailed description is carried out. Omit.

This electric machine is, for example, a discharge lamp lighting device, and has a circuit board on which an electrolytic capacitor 34 and an electronic component using an additive halogen-based flame retardant are installed. As described above, the halogen-based flame retardant of the additive type is hexabromobenzene (C ₆ Br ₆ ), pentabromobenzene, tetrabromochlorobenzene, tribromobisphenol (TBA) and the like. Since this type of halogen-based flame retardant is decomposed at a relatively low temperature and released to the outside in the form as it is, it is considered that the flame retardant used for circuit parts is likely to adversely affect the electrolytic capacitor, but it is sealed with butyl rubber. By the rubber, the generated halogen gas can be suppressed from invading the interior of the electrolytic capacitor.

In the case where a mixture of butyl rubber and ethylene propylene terephthalate rubber, which is lower in cost than butyl rubber, is used, the electronic component is suitably used at an ambient temperature of 50 ° C. or lower by vent holes provided in the case 4. Do. That is, compared with butyl rubber, halogen gas is more likely to invade the electrolytic capacitor, but by suppressing the ambient temperature inside the electrical equipment at 50 ° C. or lower, the amount of halogen released into the case is restrained to invade the electrolytic capacitor. By reducing the amount of halogen gas, it is possible to prevent the electrolytic capacitor from short-lived.

Moreover, it is preferable that the bromine ion concentration in ethylene glycol-type electrolyte solution at the time of use of a discharge lamp lighting apparatus is 2 PPM or less. That is, in the case of bromine ion, the electrolytic capacitor can be prevented from deteriorating below the above concentration.

When the electrolytic capacitor is used at a voltage of 200 V or less, the ion decomposition rate of the halogen gas in the ethylene glycol-based electrolyte solution can be slowed down, so that corrosion of the aluminum foil serving as the electrode inside the electrolytic capacitor can be suppressed. As a result, the life of the electrolytic capacitor is extended, and the life of the discharge lamp lighting device can be extended.

According to the invention of claim 1, since the electrolytic capacitor is provided on the circuit board so as to be shielded from the electronic components, premature destruction of the electrolytic capacitor can be suppressed, and the short life of the electric equipment can be prevented.

According to the invention of claim 2, since the shielding means is coated at the end of the sealing portion, it is possible to suppress the diffusion of the halide or the low molecular weight compound decomposed from the halide into the electrolytic capacitor, thereby preventing short life of the electric device.

According to the invention of claim 3, since the end portion of the sealing portion comes into close contact with or is in contact with the circuit board, it is possible to suppress diffusion of the low molecular weight compound decomposed from the halide or the halide into the electrolytic capacitor without providing a shielding means. It is possible to prevent short life of the electric equipment.

According to the invention of claim 4, since the electrolytic capacitor is shielded by the shielding body, the diffusion of the halide or the low molecular weight compound decomposed from the halide into the electrolytic capacitor can be reliably suppressed, and the short life of the electric device can be prevented.

According to the invention of claim 5, since the halide is hexabromobenzene, the effect of the invention of claims 1 to 4 is remarkable.

According to the invention of claim 6, since the temperature of the circuit board is 70 DEG C or more, the effect of the invention of claims 1 to 5 is remarkable.

According to the invention of claim 7, the volume in the case is 100 cm 3 Since it is below, the effect of the invention of Claims 1-6 is remarkable.

According to the invention of claim 8, it is possible to provide an electric device as a high frequency inverter for lighting a discharge lamp having the effects of claims 1 to 7.

Claims (8)

A circuit board having an electronic component using an electrolytic capacitor and a resin material containing a halide, wherein the electrolytic capacitor is shielded from the electronic component; A case covering the circuit board; An electrical apparatus comprising a. The electric machine according to claim 1, wherein the electrolytic capacitor is shielded from the electronic component by coating the shielding means at the end of the sealing portion. The electric machine according to claim 1, wherein the electrolytic capacitor is shielded from the electronic component by the sealing end of the electrostatic capacitor being brought into or in contact with the circuit board. The electric device according to claim 1, wherein the electrolytic capacitor is shielded from the electronic component by arranging a shield around the electrolytic capacitor. The electric machine according to claim 1, wherein the halide is hexabromobenzene (C ₆ Br ₆ ). 2. The electric machine according to claim 1, wherein the temperature of the circuit board when the electric machine is operating is 70 deg. The electric machine according to claim 1, wherein the volume in the case is 1000 cm 3 or less. The electric device according to claim 1, wherein the circuit board is a high frequency inverter for lighting a discharge lamp.