JPH097757A - Microwave oven - Google Patents

Abstract

PURPOSE: To prevent a damage of the invasion of a cockroach, by installing a harmful insect detesting processing member to the wire connected to the insulating holder of a magnetron driving circuit including a high pressure transformer and a magnetron driving circuit. CONSTITUTION: A printed board 3 furnishing a high pressure transformer 4 is fixed to a main body bottom member 1 composing a box body, together with an insulating holder 4. The insulating holder 2 has a drainboard form, and a harmful insect detesting processing member is applied on its surface, so as to prevent the climbing of a cockroach from the box body to the printed board 3, or the invasion of the cockroach between the holder 2 and the box body or between the holder 2 and the printed board 3. The paint film the processing member is applied in the same manner is formed also on the surface of the wire 5 connected to the high pressure transformer 4, so as to prevent the invasion of the cockroach. Consequently, the possibility of an accident such as a conduction failure owing to inducing a harmful insect, and a short circuit owing to an insect carbonization can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to improvement of a microwave oven having a pest repellent function for the purpose of sanitary pest repellent.

[0002]

2. Description of the Related Art Microwave ovens used at home, especially in the kitchen, may be greatly damaged by unpleasant insects such as cockroaches or hygienic insects. These pests are attracted by the bait and enter the microwave circuit part,
Various measures have been taken to keep the microwave oven clean and leave no leftovers. In addition, in order to prevent the invasion of cockroaches, it was considered to make the surrounding housing including the circuit part a closed structure, but it is necessary to ventilate to prevent the retention of heat such as cooking heat and cooking odor. Therefore, it is not practical to make a closed structure.

[0003]

Due to the nature of cockroaches being hidden behind objects, they are hidden behind the bottom of the microwave oven or behind them. On the other hand, even if the microwave oven is considered to be completely sealed as described above, it is difficult to take a completely sealed structure such as a heat radiation part and an opening / closing part. In addition, cockroaches in childhood invade through even small gaps. The invading cockroaches grow inside and cause various damages. When cockroaches with eggs invade, they also multiply inside. Furthermore, when these harmful insects or their carcasses come into contact with the charging part, especially the high-voltage part in the microwave oven, there is a risk of malfunction or heat generation. Therefore, an object of the present invention is to provide a microwave oven having this kind of pest repellent function.

[0004]

According to the present invention, a pest repellent treatment section is provided in an insulation holder of a magnetron drive circuit section including a high-voltage transformer inside a microwave oven. Also,
According to the present invention, a pest repellent treatment member is attached to an electric wire connected to a magnetron drive circuit section including a high-voltage transformer inside a microwave oven.

[0007] Here, the pest repellent treatment section is especially at 27 ° C.
It is advisable to install a repellent against unpleasant and hygienic insects such as cockroaches that are attracted to a temperature environment of ± 5 ° C. Further, the pest repellent treatment section can be provided by a coating film of a paint resin containing a pest repellent such as a cockroach. Further, the pest repellent treatment section can be provided by disposing a pest repellent on the surface and covering the inner surface with a tape having an adhesive applied. For the pest repellent treatment section or the pest repellent treatment member, a pest repellent member formed by adsorbing and supporting a pest repellent such as a cockroach on the adsorbent and dispersing it in the resin, is formed as a packing member, a wire binding member or a wire insulation holding member. Can be used. Further, the repellent is preferably a transdermally effective cockroach repellent material.

[0006]

[Action] Cockroaches have a greater attraction to the habitat than do food and water. That is, the most common and most frequently encountered pests of cockroaches in Japan are the German cockroaches, the American cockroaches, and the black cockroaches. Fig. 1 shows the optimum temperature for the growth of German cockroaches.
27 ° C. ± 5 ° C., as shown in FIG. Other cockroaches are also attracted to an environment of similar temperature. A cockroach repellent effect can be obtained by disposing a drug having a repellent effect on this attracting action in the entrance to the microwave oven, inside the microwave oven, or in the wall of the optimum temperature environment. In addition, the learning effect of cockroaches can be used to further improve the repellent effect.

For example, fatty acids such as oleic acid are often used in the constituent resin of the microwave oven and the internal circuit board, and these substances are known as substances that attract cockroaches. On the other hand, cockroaches are also attracted to the inside of the microwave oven, especially the control display section, the suitable temperature for habitation in the high pressure section,
Attempts to invade the inside of the microwave oven main body through the gap of the housing joint portion having the heat dissipation hole. There are many parts inside the microwave oven that generate heat, such as the control board, display unit, magnetron drive power supply unit, and operating unit such as the motor for rotating the cooked food. , Making suitable temperature for habitation above. The magnetron drive power supply unit is also controlled by an inverter, and is equipped with a drive unit with a large circuit board. However, when a large current or a high voltage is applied on these circuits and the cockroaches pass through or there are dead cockroaches, the current leaks, and if the cockroaches carbonize, there is a possibility of ignition.

As a path for the cockroaches to reach the magnetron drive circuit section, a cockroach that has entered the main body of the equipment through a heat dissipation hole of the housing climbs from the bottom surface, or a cockroach that once enters the microwave housing has a constant heat generation inside the housing. There is a route for wandering on another substrate such as a substrate and transferring from there through an electric wire connected to the magnetron drive circuit unit. The magnetron drive circuit section is provided with the insulation holder, the surface area is made large, and a pest repellent treatment section is provided on the surface of the insulation holder so that the cockroach always touches the tactile sensation or the leg in the path to the magnetron drive circuit section. Set up. Alternatively, a pest repellent treatment unit is provided on the electric wire connected to the magnetron drive circuit unit, or a packing member,
Attach the pest repellent treatment member formed on the wire binding member or the wire insulation holding member.

As the above-mentioned pest repellent treatment, a transdermally effective cockroach repellent material is applied by a method such as paint or resin kneading molding to prevent damage from invading cockroaches. That is, cockroaches wander through the corners and gaps and penetrate through the bottom hole of the microwave oven. When the above-described pest repellent treatment is applied to the insulating holder of the magnetron drive circuit section on the bottom surface, the surface of the insulating holder is searched with its antennae and front legs in order to climb the magnetron drive circuit section as a behavior of cockroaches. At that time, the pest repellent treatment surface is touched and the repellent action is exerted. Alternatively, the repellent material can be kneaded in a resin and molded into a packing member, a wire binding member or a wire insulation holding member. The repellent action is similar to that of the above-mentioned insulation holder.

As described above, according to the present invention, it is possible to prevent an increase in the feeling of filth inside the microwave oven, which is inevitable to attract pests because it is at the optimum temperature for growing unpleasant pests. Further, there is an effect that it is possible to reduce the possibility of causing many accidents such as poor conduction due to pest attraction or short circuit due to carbonization of pests. Also, by using a transdermally effective cockroach repellent material that is less toxic than an insecticide, safety is ensured and an offensive odor is reduced by using a repellent material with a low vapor pressure, and it is installed in a living space. The effect of meeting the condition as a range is also obtained.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. [Embodiment 1] FIG. 2 shows a magnetron drive circuit section including a high-voltage transformer inside a microwave oven of the embodiment, its insulation holder and a bottom member of the main body. The magnetron drive circuit unit including the high-voltage transformer 4 is formed on the noncombustible printed circuit board 3 having a size of 11 cm × 7 cm. This drive circuit unit has about 400 between the anode and cathode of the magnetron.
A voltage of 0V is applied, and high electrical insulation is required although it is partial. Further, since it is necessary to maintain the insulating property even with the housing, the insulating holder 2 is provided in order to fix the printed board to the housing. Reference numeral 1 denotes a bottom member of a main body of a microwave oven which constitutes a housing, and an insulation holder 2
At the same time, the printed circuit board 3 is fixed. Reference numeral 4 is an electric wire connected to the high-voltage power transformer provided on the printed circuit board 3. The insulation holder 2 is made of heat-resistant ABS resin, and has a structure in which the circumference is larger by 5 mm in both length and width than the above-mentioned substrate, and the substrate is inclined so that it is separated from the housing by at least 1 cm or more. When the cockroach climbs from the housing to the printed circuit board, or when the cockroach invades between the holder and the housing, or between the holder and the printed circuit board, the repellent applied to the surface of the holding tool 2 is a tactile sensation of the cockroach. It has a large surface area in order to take many opportunities to come into contact with.

Next, the details of the repelling process will be described. In advance, 100 parts by weight of a resin component was mixed with 100 parts by weight of a pyrethroid-based cockroach repellent in a urethane resin, and 2
Prepare an unpleasant / hygienic pest repellent paint diluted with 00 parts by weight of thinner. The insulation holder 2 is coated so that the pest repellent paint has a concentration of about 50 mg / dm ² when converted to a repellent. There is a high-voltage transformer, which is a heat generating part, and its drive circuit on the printed circuit board 3, and the surrounding area is 27 ± 5 ° C, which is a temperature environment that causes pests, although it varies depending on the season due to residual heat even after using the microwave ing. However, since the insulating holder 2 holding the printed circuit board 3 is coated with the pest repellent paint, cockroaches do not enter the drive circuit section. It is also possible to apply the pest repellent paint on the surface of the printed board 3, or on the parts mounted on the board and the back surface of the printed board, as in the case of the insulating holder 2. Further, a similarly coated film can be formed on a part of the surface of the electric wire 5 connected to the high-voltage power transformer.

Next, the result of the simulated test will be described. A container having a bottom area of 10 times the bottom member of the microwave oven used for the test and having a depth of 30 cm was used. Machine oil is applied to the vertical wall surface of this container, an insulating holder 2 having the above-mentioned printed circuit board 3 mounted in the center thereof, and water and food at one end are arranged, and a microwave oven is used for the printed circuit board. Energize as before. 50 male and 50 female cockroaches
Release the animal into the container. The results of behavioral analysis of the cockroaches recorded on a video tape recorder overnight are shown in Tables 1 and 2. From this result, it is clear that the repellent effect of the present invention is effective.

[0014]

[Table 1]

[0015]

[Table 2]

[Embodiment 2] FIGS. 3 and 4 show an example in which an electric wire 5 connected to a magnetron drive circuit board 3 including a high-voltage transformer is provided with a coating layer 6 containing a pest repellent. The coating layer 6 is composed of a tape substrate 8 made of a polyethylene terephthalate resin film having a thickness of about 30 μm, an adhesive layer 7 formed on the inner surface of the tape substrate 8, and a resin coating 9 containing a repellent applied on the surface of the tape substrate. ing.
The resin coating 9 is formed by a urethane paint containing a pyrethroid-based cockroach repellent, and the repellent is 50 m.
It is contained at a concentration of g / dm ² . In the center of the microwave oven, there is a magnetron drive circuit that includes a high-voltage transformer, and heat is generated for a while during and after using the microwave. Although the environment around the circuit part varies depending on the season, the environment where the microwave oven is installed may be air-conditioned,
The atmosphere is kept at 27 ± 5 ° C. There is a control part of the microwave oven around this circuit part, and there is an air intake for air cooling around the part, and the cockroach that invades from the air intake controls the microwave oven that is continuously energized day and night. To the magnetron drive circuit section via the section.

Since the control unit is a low-voltage circuit, accidents such as electric discharge due to invasion of cockroaches are few, and damage can be prevented in advance by a simple insulation process. Since a current is applied, a cockroach intrusion may cause a discharge accident. Cockroaches approach the bottom of the microwave oven and sneak in during active hours. Subsequently, the atmosphere of 27 ± 5 ° C. inside the microwave oven is noticed, the air enters from the air intake port for air cooling, and tries to enter the magnetron drive circuit section via the electric wire. However, the unpleasant / sanitary pest repellent member consisting of the coating layer in front of it is touched and repelled.

[Embodiment 3] FIG. 5 shows an example of a pest repellent member obtained by molding a pest repellent such as a cockroach into a packing member, a wire binding member or a wire insulation holding member. 10
Is a magnetron drive circuit board 3 including a high voltage transformer 4.
2 shows an electric wire binding member attached to the electric wire 5 connected to. Further, 11 is an electric wire insulation holding member for fixing the electric wire 5, and 12 is a packing member when the electric wire 5 penetrates the partition wall. Each of these members is made of polyethylene and has a repellent surface on its surface. The repellent surface is a resin coating containing a pyrethroid-based cockroach repellent at a concentration of 50 mg / dm ² in the urethane coating, and has the same effect as in the above-mentioned examples.

[0019]

As described above, according to the present invention, it is possible to prevent an increase in the filthiness inside the microwave oven, which is inevitable to attract pests because it is at the optimum temperature for growing unpleasant pests. Further, there is an effect that it is possible to reduce the possibility of causing many accidents such as poor conduction due to pest attraction or short circuit due to carbonization of pests.

[Brief description of drawings]

FIG. 1 is a diagram showing the optimum temperature for collecting German cockroaches.

FIG. 2 is an exploded perspective view of a main part of the microwave oven according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a magnetron drive circuit board having an electric wire with a pest repellent member according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a cross section of a main part of the electric wire.

FIG. 5 is a packing member according to still another embodiment of the present invention,
It is a perspective view which shows an electric wire binding member and an electric wire insulation holding member.

[Explanation of symbols]

 1 Microwave oven bottom member 2 Insulation holder 3 Printed circuit board 4 High-voltage power transformer 5 Electric wire 6 Cover layer having repellent 7 Adhesive layer 8 Tape base material 9 Resin coating containing repellent 10 Wire binding member 11 Wire insulation holding member 12 Packing material

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location F24C 7/02 501 501456-3K H05B 6/68 320G H05B 6/68 320 A01N 53/00 502 (72) Inventor Toshio Kai, 1006 Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. (72) Inventor, Mamoru Isoya, 1006, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A microwave oven in which a pest repellent treatment section is provided on an insulation holder of a magnetron drive circuit section including a high-voltage transformer inside the microwave oven. 2. A microwave oven in which a pest repellent treatment member is attached to an electric wire connected to a magnetron drive circuit section including a high-voltage transformer inside the microwave oven.