JP2006349198A - High frequency heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-frequency heating device capable of protecting a machine chamber from steam and heat by an inexpensive and simple composition. <P>SOLUTION: The high-frequency heating device is provided with a heating chamber 30 housing an object to be heated, a high-frequency generating means 14 for heating the object to be heated, a steam generating means 15 for heating the object to be heated, a cooling fan 28 for cooling a machine chamber 11 interior, a print base plate 27 housing and holding an inverter power source 26 generating high voltage and an inverter power source 26 board, an infrared sensor 25 detecting temperatures of non-heated objects of the heating chamber, and an inspection hole 24 introducing infrared rays to the infrared sensor 25. An air duct 21 is composed for having cooling air D by the cooling fan 28 introduce air including steam exhausted from the inspection hole 24 from the heating chamber 30 to the machine chamber 11 to a machine chamber 11 exterior, and devices in the machine chamber 11 are protected from heat, and dew condensation due to the steam. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a high-frequency heating apparatus having a function of heating an object to be heated using steam.

Conventionally, this type of high-frequency heating device prevents air B containing water vapor supplied to the heating chamber 7 from entering the machine room 1 from the viewing hole 8 of the temperature detecting infrared sensor 6 provided in the heating chamber 7. In order to prevent this, a configuration is known in which cooling air is blown between the heating chamber 7 and the peep hole 8 by blowing air from the cooling fan 4 with an air guide (not shown) to create a pressure space on the machine chamber 1 side. Thereby, the inflow of the air B containing water vapor into the machine room 1 is suppressed, and at the same time, the detection window (not shown) of the infrared sensor 6 is prevented from being contaminated (see, for example, Patent Document 1).
Japanese Patent Application Laid-Open No. 2004-263881

  However, in the conventional configuration, when the amount of steam to be supplied is increased in order to increase the amount of heating by steam, the pressure sufficient to stop the discharge of high-pressure steam generated by the steam generator from the viewing hole 8 of the infrared sensor 6. Air B containing water vapor discharged from the peep hole 8 stays in the machine room, while the cooling air A sucked into the cooling fan 4 from outside the apparatus is also inside the machine room 1. Because the air B is dispersed, the air B is cooled and condensed in the machine room 1, which may cause, for example, insulation deterioration of the control component 2 provided in the machine room 1.

  An object of the present invention is to solve the above-mentioned conventional problems, and to provide a high-frequency heating device for preventing air containing water vapor from staying in a machine room and preventing the occurrence of condensation in the machine room. To do.

  In order to solve the above-mentioned conventional problems, a high-frequency heating device of the present invention includes a heating chamber for storing an object to be heated, high-frequency generating means for heating the object to be heated by high-frequency radio waves, and the object to be heated by steam. Steam generating means for heating, control means for controlling the high-frequency heating means and steam generating means, a machine room provided alongside the heating chamber for storing the control means, and outside air in the machine room A cooling fan, an infrared sensor provided in the machine room, and a viewing hole provided between the machine room and the heating chamber for detecting the temperature of the heated object by the infrared sensor, An air path for guiding the air containing water vapor discharged from the heating chamber to the machine room through the peep hole is configured to be outside the machine room.

  Accordingly, it is possible to reliably prevent air containing water vapor from staying in the machine chamber and causing condensation in the machine chamber.

  According to the high-frequency heating device of the present invention, the cooling air generated from the cooling fan can be efficiently induced, and the machine room can be protected from the air and heat contained in the water vapor coming out of the viewing hole of the heating cabinet. Further, no special device is required in terms of configuration, and the protection is effectively performed with a simple configuration, so that the configuration can be made at low cost.

  The first invention includes a heating chamber for storing an object to be heated, high-frequency generating means for heating the object to be heated with high-frequency radio waves, steam generating means for heating the object to be heated with steam, and the high-frequency heating means. A control means for controlling the steam generating means; a machine room provided alongside the heating chamber for housing the control means; a cooling fan for taking outside air into the machine room; and An infrared sensor provided, and a viewing hole provided between the machine room and the heating chamber for detecting the temperature of the object to be heated by the infrared sensor, and discharged from the heating chamber to the machine room through the viewing hole. By constructing an air passage for guiding the air containing the water vapor to the outside of the machine room, the air flow from the cooling fan is rectified to protect the machine room from the water vapor discharged from the peephole. Can.

  According to a second aspect of the present invention, in particular, the control means according to claim 1 includes an inverter power supply that supplies power to the high-frequency generation means, and the inverter power supply is an insulating material that covers the circuit board and the solder surface of the circuit board. The cooling fan is arranged at the rear of the machine room, the inverter power supply is arranged at the front upper part of the cooling fan with the component surface facing downward, and the wall-shaped guide provided upward from the case By configuring the path, air can be rectified by the guide and more steam containing air can be sent to the exhaust port of the machine room together with the hot air that has stayed until now. The machine room can be protected from heat.

  According to a third aspect of the present invention, the bottom surface of the air passage is configured to have an inclination that goes down toward the outside of the machine room, and condensed water condensed in the air passage is discharged outside the machine room. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a side view of a high-frequency heating device according to Embodiment 1 of the present invention, FIG. 2 is a side view for explaining the flow of air, and FIG. 3 is a similar plan view.

  In FIG. 1, a machine room 11 includes a high-frequency oscillator 14, an inverter power supply 26 for supplying power to the high-frequency oscillator 14, and the temperature of an object to be heated that is attached to the side wall of the heating chamber 30 and stored in the heating chamber 30. An infrared sensor 25 to detect and a cooling fan 28 for introducing outside air to cool the devices housed in the machine room 11 are arranged. Further, steam generating means 15 (FIG. 3) for supplying steam into the heating chamber 7 is provided on the bottom side of the heating chamber 7.

  In the present embodiment, the print base plate 27 for holding and fixing the inverter power supply 26, the print base mounting plate 22 for fixing it to the side of the side wall of the heating chamber 30, and the water vapor coming out of the infrared sensor 25 through the observation hole. The air guide 23 for forming the air path for making it easy to guide the air containing the air in the discharge direction together with the cooling air that has cooled the machine room.

  The print base plate 27 is formed by resin molding, and the air guide 23 is configured such that the lower end is inclined along the inclination of the print base plate 27 and the upper end is inside the cover (not shown) of the device body. The air passage 21 is formed by the air guide 23, the print base plate 27, and the cover so that the cooling air can be easily rectified and guided to the outside of the device.

  About the high frequency heating apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

As shown in FIG. 2, by driving the cooling fan 28, the outside air F is sucked from the outside of the device, and the cooling air D is supplied into the machine room 11. The outside air supplied into the machine room 11 slightly increases the pressure of the air inside the machine room 11 compared to the outside air, and the cooling air sent by the cooling air D and the air guide 23 to prevent contamination and cooling of the infrared sensor 25. I stays mixed with the air H containing water vapor that has exited from the viewing hole 24 of the infrared sensor 25. When the cooling air D supplied by the cooling fan 28 is supplied thereto, the staying air H and cooling air I together with the cooling air D pass through the air passage 21 created by the air guide 23. Then, it is extruded as air G containing water vapor from a discharge port (not shown).

  FIG. 3 is a plan view showing this state, and the cooling air D supplied by the cooling fan 28 entrains the air H discharged from the viewing hole 24 and passes through the air passage 21 constituted by the air guide 23. It is extruded as air G containing water vapor from a discharge port (not shown) provided on the back of the device.

  In addition, since the air path having the slope of FIG. 3 made by the air guide 23 is configured so that the cross-sectional area expands toward the outside of the device, a speed difference is generated and it is easy to discharge. In addition, a suction force is generated by the negative pressure 14 that is generated when the cooling fan sucks the outside air, so that the water vapor does not stay in the machine chamber, thereby preventing condensation in the machine chamber and discharging hot air. The temperature can be protected from heat.

  Further, since the air passage 21 is inclined toward the outside of the device, it can be discharged out of the device even if condensation occurs in the air passage.

  As described above, in the present embodiment, since the air passage whose cross-sectional area expands from the vicinity of the infrared sensor viewing hole toward the outside of the device, the cooling air supplied to the machine room by the cooling fan is used. The air containing water vapor that has leaked from the viewing hole into the machine room can be efficiently discharged out of the device.

  As described above, according to the high-frequency heating device of the present invention, air containing water vapor staying in the equipment can be efficiently discharged out of the equipment, so that not only the water vapor but also the equipment in the machine room is cooled. Thus, it becomes possible to efficiently discharge the air that has become hot.

Side view of the high-frequency heating device according to Embodiment 1 of the present invention. Side view of the high-frequency heating device according to Embodiment 1 of the present invention. The top view of the high frequency heating apparatus in Embodiment 1 of this invention Perspective view of a conventional high-frequency heating device

Explanation of symbols

11 Machine room 14 High frequency oscillator (high frequency generation means)
15 Steam generating means 21 Air path 22 Print base mounting plate 23 Air guide (guide)
24 Peephole 25 Infrared sensor 26 Inverter power supply (control means)
27 Print base board (case)
28 Cooling fan 30 Heating chamber

Claims (3)

A heating chamber for storing the object to be heated, high frequency generating means for heating the object to be heated with high frequency radio waves, steam generating means for heating the object to be heated with steam, and controlling the high frequency heating means and the steam generating means. A control unit for accommodating the control unit, a machine room provided adjacent to the heating chamber, a cooling fan for taking outside air into the machine room, and an infrared sensor provided in the machine room An air containing water vapor discharged from the heating chamber to the machine chamber through the peep hole, the peep hole provided between the machine room and the heating chamber for detecting the temperature of the object to be heated by the infrared sensor A high-frequency heating device characterized in that an air passage for guiding the outside of the machine room is configured. The control means includes an inverter power supply for supplying power to the high frequency generating means, and the inverter power supply includes a circuit board and an insulating case covering the solder surface of the circuit board, and a cooling fan is disposed at the rear of the machine room. The inverter power supply is arranged with a component surface facing downward at the front upper part of the cooling fan, and an air passage is constituted by a wall-shaped guide provided upward from the case. High frequency heating device. The high-frequency heating device according to claim 1 or 2, wherein the bottom surface of the air passage has an inclination that goes down toward the outside of the machine room, and condensed water condensed in the air passage is discharged to the outside of the machine room.