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Power source control circuit and cooker

A technology for power control circuits and cookers, which is applied to dielectric heating circuits, circuit devices, induced current sources, etc., can solve problems such as the power consumption of discharge resistors, and achieve the effects of reduced power consumption, low power consumption, and low cost.

Inactive Publication Date: 2003-01-08
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In Conventional Example 1 and Conventional Example 2, since the power supply holding switch is inserted in series into the power supply line, there is a problem that it is necessary to allow a large current that is the same as the load current that flows when the load is operating. Large current capacity power supply holding switch (relay switch)
[0015] In Conventional Example 3, since the charged charge of the noise prevention capacitor is to be discharged, and the discharge resistor is connected in parallel to the noise prevention capacitor, there is a problem that power consumption by the discharge resistor occurs during standby even if it is small.

Method used

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  • Power source control circuit and cooker
  • Power source control circuit and cooker
  • Power source control circuit and cooker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Figure 4 The circuit diagram of is showing Embodiment 1 of the present invention, showing a power supply control circuit loaded into a cooker with a door. exist Figure 4 In this example, a commercial AC power supply 1 is connected to power supply lines 1a, 1b for supplying electric power to a load 6 of the cooker. As the load 6, for example, a high-frequency generating circuit can be used when the cooker is a microwave oven, or a heater can be used when the cooker is an oven. In addition, the power supply control circuit of the present invention can also be applied to appliances other than cooking appliances that open and close doors at startup.

[0033] A filter coil 9a and a start switch 3 are connected in series to the power line 1a. The start switch 3 is a door switch that operates according to the opening and closing of the door (not shown) of the cooker, has a common terminal 3a connected to the power line 1a, and is connected to the common terminal 3a when t...

Embodiment 2

[0043] The circuit diagram of Fig. 5 shows Embodiment 2 of the present invention, in Figure 4 In the circuit diagram, a protective element for peak signal absorption is added, so it is more practical. Also, for those with Figure 4 The same parts are given the same reference numerals and their detailed descriptions are omitted. In FIG. 5 , a spike absorber 22 made of, for example, a nonlinear resistor is connected in parallel to the noise prevention capacitors 12 and 13 . One end of the spike absorber 22 is connected to the power supply line 1 a, and the other end is connected to the primary side terminal 7 b of the step-down transformer 7 . One end of another spike absorber 23 is also connected to the primary side terminal 7 b of the step-down transformer 7 , and the other end of the spike absorber 23 is grounded. One end of a fuse 24 is connected to the primary side terminal 7b of the step-down transformer 7, and the other end of the fuse 24 is connected to the power lin...

Embodiment 3

[0046] Image 6 The circuit diagram of shows Embodiment 3 of the present invention. Also, for those with Figure 4 Components that are the same as those in FIG. 5 are given the same reference numerals, and detailed description thereof will be omitted. exist Image 6 Among them, the two terminals of the power supply hold switch 4 are respectively connected to the common terminal 3a and the open terminal 3c of the start switch 3 . The open terminal 3 c is connected to the primary side terminal 7 a of the step-down transformer 7 . A noise prevention capacitor 2 is connected between a connection point between the power supply hold switch 4 and the open terminal 3c and the power supply line 1b.

[0047] The power supply holding switch 4 is constituted by a relay switch, and it is constituted to conduct on / off by means of a control power source connected to the rectifying and smoothing circuit 14 obtained by connecting to the primary side terminals 7c, 7d of the step-down transf...

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PUM

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Abstract

In the power supply control circuit, interposed between the power lines 1a and 1b is a serial circuit 21 constructed by connecting in series a radio interference suppression capacitor 2 for suppressing radio interference and a power supply holding switch 4. A node of the radio interference suppression capacitor 2 and the power supply holding switch 4 is connected via an auxiliary power line 1d to a primary side terminal 7a of a stepdown transformer 7, and another primary side terminal 7b of the stepdown transformer 7 is connected to a power line 1b. With the power supply control circuit, reduction of electric power consumption can be realized using a power supply holding switch with a small capacity.

Description

technical field [0001] The present invention relates to a power control circuit for reducing power consumption by cutting off power supply to a control part during standby, and a cooker provided with the power control circuit. Background technique [0002] figure 1 The circuit diagram of is showing a prior art example 1, showing a power supply control circuit loaded into a cooker with a door. exist figure 1 In this example, a commercial AC power supply 1 is connected to power supply lines 1a, 1b for supplying electric power to a load 6 of the cooker. As the load 6, for example, a high-frequency generating circuit can be used when the cooker is a microwave oven, or a heater can be used when the cooker is an oven. [0003] On the power supply line 1a, there is connected in series when the cooker is in use and adopts the way of supplying electric power to the control part 8 to carry out on (on) control, and it is composed of a relay switch to perform off (off) control under ...

Claims

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Application Information

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IPC IPC(8): F24C7/02H02J1/00H05B6/66
CPCH05B6/6417
Inventor 本田昌辉
Owner SHARP KK