JPH03191621A - Controller for electric appliance - Google Patents

Abstract

PURPOSE:To prevent a wiring from being exposed to the outside of a body and a door body, and also, to make a good appearance in a cosmetic design by providing a coil on the body side and the door body side respectively, and guiding and coupling both coils at the time when the door body is closed. CONSTITUTION:When a microcomputer 8b receives a signal from a console panel 4, the signal is encoded to the combination of '0' and '1' in accordance with the determined procedure. In such a state, when an oscillating circuit 8c is operated and stopped repeatedly in accordance with '0' and '1', a current flows intermittently by the same frequency to a signal receiving coil 10 through a diode 8d. In this case, as well, by a mutual induction, a voltage of the same frequency is induced in a signal receiving coil 7. A microcomputer 5c reads in this waveform, and processes it in accordance with the determined procedure. In the case of sending a signal to a door body side from a body side, as well, it is executed in the same manner.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a control device for electrical products.

[Conventional technology]

FIG. 6 is a perspective view showing the wiring of a control circuit for a refrigerator, which is a control device for an electrical appliance, disclosed in, for example, Japanese Utility Model Application Publication No. 50-14666 (hereinafter referred to as the conventional example). , 1 is the door body of the refrigerator, 2 is the refrigerator body,
3 is a lead wire.

The door body 2 is the refrigerator body! It is attached to the front opening by a hinge body. The lead wire 3 is wired to send power or signals from the refrigerator main body 1 to the door body 2. Since the refrigerator main body 1 and the door body 2 are foam-filled with a heat insulating material inside, a communicating portion 3a penetrating the inner surface of the door body 2 is provided, and the lead wire 3 is passed through this communicating portion and connected to the door body 2. guided inside.

[Problem to be solved by the invention]

As described above, since the control device of the conventional electric product is configured, it is necessary to wire from the main body 1 to the door body 2. Although it can be hidden by passing the communication part 3a arranged in the main body 1 and the door body 2, it has to be exposed to the outside once between the main body 1 and the door body 2, which is a problem in terms of design. . Furthermore, for safety reasons, exposed parts must always be covered, and this is also subject to design restrictions. Furthermore, there is a problem in that in order to shorten the wiring exposed to the outside, the wiring must be placed near the hinge body.

This invention was made to solve the above-mentioned problems, and the wiring of the electrical appliance does not come out of the main body or the door body, making it inexpensive, highly reliable, and aesthetically pleasing. The purpose is to obtain electrical products. Furthermore, the object is to create a configuration that allows mutual transmission and reception from both the main body side and the door body side, and to make it possible not only to transmit from the operation panel but also to display information from the main body side on the operation panel. Further, the main body side coil and the door body side coil are supplemented by a pair of one coil each, so that the number of parts is small and the coils can be easily installed.

(Means for Solving the Problems) For this reason, the present invention includes a main body of an electrical appliance, a door provided on the main body that can be freely opened and closed, and a main body side that is arranged on the main body and that exchanges alternating current electricity. a coil, and a door-side coil disposed on the door body, capable of inductive coupling with the body-side coil at least when the door body is closed, and transmitting and receiving the alternating current amount of electricity. The purpose of this invention is to achieve the above object with a control device for an electrical appliance consisting of the following.

Moreover, in the above-mentioned invention, the above-mentioned object is attempted to be achieved by a control device for an electrical product that transmits and receives electric power and signals by a combination of a main body side coil and a door body side coil.

[For production]

In the control device for an electrical product according to the present invention, the main body side coil disposed on the electrical product body and the door body side coil disposed on the door body are inductively coupled at least when the door body is closed, and the AC power is Give and receive amounts.

(Example〕 Hereinafter, two embodiments of the present invention will be described based on the drawings.

Figure 1 is a side sectional view showing a first embodiment of the present invention, Figure 2 is a plan view of the first embodiment, Figure 3 is a control circuit configuration diagram of the first embodiment, and Figure 4 is a diagram showing the first embodiment. FIG. 5 is a flowchart showing the transmission procedure of the first embodiment, FIG. 6 is a side sectional view showing the second embodiment of the invention, and FIG. 7 is the second embodiment. Example plan view, Figure 8 is the second
FIG. 9 is a waveform diagram showing a state in which a signal waveform is superimposed on the power waveform of the second embodiment and separated again. FIG. 10 is a diagram showing the power rest period and control of the second embodiment. A time chart showing a state in which signals are sent from the board, and FIG. 11 is a partial perspective view of a conventional refrigerator.

In the drawings, the same or equivalent components as those of the conventional example are indicated by the same reference numerals, and some parts will be explained repeatedly.

First, regarding the first embodiment of the present invention, FIGS.
This will be explained using figures.

In FIG. 1 of the drawings, A is a main body of an electric appliance (hereinafter referred to as the main body), which is composed of a refrigerator main body 1. Reference numeral B denotes a main body side coil, which is composed of a power supply coil 6 and a signal reception coil 7, is disposed in the main body A, and is a coil for transmitting and receiving alternating current electricity (details will be described later). C is a door body side coil, which is composed of a power supply coil 9 and a signal reception coil 10, and is disposed on the door body 2 and at least connects the door body 2 with F.
When it is A, it is a coil that can be inductively coupled to the main body side coil B and exchanges an alternating current amount of electricity (details will be described later). Moreover, 4 is an operation panel attached to the door body 2 and having a display function. From the control board 5 having the function of controlling the refrigerator main body 1, a power supply coil 6 and a signal receiving coil 7, which are the main body side coil B, are wired toward the door body 2 through the inside of the refrigerator main body 1. There is. Operation panel 4
is connected by wiring to the control board 8 on the door body side, and sends a setting signal to the control board 8 using a switch or a variable resistor (not shown), and displays the status using an LED, LCD, etc. (not shown). Further, the control board 8 is wired with a power receiving coil 9, which is a door body side coil C, and a signal receiving coil 1° toward the vicinity of the main body 1.

FIG. 2 is a top view of the first embodiment, and shows the coil 6.
．． 7,9. ．． The arrangement state of each of the 10 is shown.

The power supply coil 6 and the receiving coil 9 are arranged close to each other, and the signal receiving coil 7 and the receiving coil 10 are also arranged close to each other. Here, the power coil and the signal coil are placed at a distance so that they do not affect each other.

Next, the operation of the first embodiment will be explained using FIG. 3.

In FIG. 3, power is supplied to the control board 5 on the main body 1 side from a commercial power source (not shown). This alternating current power is converted into voltage by the power supply circuit 5a, and part of the voltage is converted by the control board 5.
The other one is converted into a high frequency by the oscillation circuit 5b and flows to the power supply coil 6. When the coil 6 oscillates at a high frequency, a voltage of the same frequency is generated in the power supply coil 9 due to mutual induction. This voltage is applied to the constant voltage circuit 8
The voltage is made constant at step a and used as a power source for the control board 8 on the door side. Next, the microcomputer 8b receives the signal from the operation panel 4, stores it in its memory (not shown), and encodes the signal into a combination of "0" and "l" according to a predetermined procedure (described later). Here, when the oscillation circuit 8c is repeatedly operated and stopped according to "0" and "1", a current flows intermittently at the same frequency into the signal receiving coil 10 through the diode 8d. At this time, a voltage of the same frequency is intermittently generated in the signal receiving coil 7 due to mutual induction. This voltage does not go to the oscillation circuit 5d because of the diode 5e, but is taken out as a signal from the diode 5f through the pass filter 5g and shaped into a waveform that can be read by the microcomputer 5C by the waveform shaping circuit 5h. The microcomputer 5C reads this signal and processes it according to a predetermined procedure (denoted by #).

Next, the case where a yes signal is sent from the control board 5 on the main body 1 side to the control board 8 on the door body 2 side will be explained using FIG.

The microcomputer 5c transmits the data according to the prescribed procedure.
Coded as a combination of 0 and 1.

Here, when the oscillation circuit 5d is caused to operate and stop according to "0" and "B", a current flows intermittently at the same frequency to the coil 7 through the diode 5e. A voltage with the same frequency is intermittently generated at 1o.Since there is a diode 8d, this voltage does not go to the oscillation circuit 8c, but passes through the bandpass filter 8f through the diode 8e, and is taken out as a signal and the waveform shaping circuit 8g generates a waveform that can be read by the microcomputer 8b. The microcomputer 8b reads this signal and processes it according to a predetermined procedure.

Next is the main body! The procedure for transmitting and receiving data between the control board 5 on the side and the control board 8 on the door body 2 side will be explained using FIGS. 4 and 5.

First, the case where data is transmitted from the control board 5 on the main body side to the control board 8 on the door side will be explained using FIG. 4.

When the control board 5 on the main body side sends No. 15 to start transmission (step 11), if the control board 8 on the other side, that is, the door body side, is ready for reception, it will receive a signal of reception 0. . Wait a predetermined time for the control board 5& on the main body side, and if reception 0 does not come (step 12N), perform transmission failure processing (step 15), and if reception 0 arrives (step 12), perform the predetermined time Data transmission (step 13) is performed according to the specified procedure. Data transmission (step 13)
), wait for a predetermined time to receive a reply from the control board 8 on the door side that the data has been received, and when data transmission 0 (step 14Y) is received, the process is completed and the data transmission is OK. If not (step 14N)
) Transmission failure processing (step 15) is performed.

Next, the procedure when the control board 8 on the door side receives signals from the control board 5 on the main body side will be explained using FIG.

When the signal from the 1IIJal board 5 of the main body 1@ is received, it is checked whether the signal can be received (step 16). If it is not ready to receive (step 17N)
The loop is extracted, and if everything is in order (step 17Y), a reception OK message is sent (step 18), and data is received (step 19). Check the received data (step 201) to determine whether the data is correct (step 21), and if it is not correct (step 21N), loop (extract it), and if it is correct (step 21Y), send the data to 0 (step 21). Step 22) and end.On the other hand, if you want to send the data from the control board 8 on the 13 side to the control mj:board 5 on the main body side, all you need to do is change the procedure.

As explained above, according to the first embodiment, it is possible to obtain a control device for an electrical product that has a pair of coils for transmitting and receiving electric power and a pair of coils for transmitting and receiving signals, and is capable of transmitting and receiving AC power. It will be done.

In addition, a pair of coils for receiving and receiving No. 100 are installed,
A control device for an electrical appliance that can transmit and receive from both the main body side and the door body side can be obtained.

In the first embodiment, the power coil and the No. 3 coil were arranged as shown in Fig. 2, but if they are located at a distance that allows for mutual induction and do not affect each other, This arrangement is not required.

Furthermore, although the first embodiment has been explained using a refrigerator, it is of course not limited to this, and similar functions and effects can be achieved with other electrical appliances.

Next, regarding the second embodiment of the present invention, FIGS.
This will be explained using Figure 0.

First, let us explain the differences between this second embodiment and the first embodiment in the sixth section.
This will be explained using figures.

In Figure 6 of the drawing, coil B on the main body side supplies power, and 1
No. 3 consists of a body-side coil 6 that serves both as transmission and reception, and the door-side coil C consists of a door-body coil 8 that serves both as power reception and signal transmission and reception. Power and signals are exchanged using a combination of a pair of coils (details will be described later). Also, the refrigerator body 1
From the control board 5, which has the function of controlling the refrigerator body 1, a body-side coil 6, which serves both for power supply and signal transmission and reception, is wired toward s2 through the inside of the refrigerator body 1.

The operation panel 4 is connected to the 7 wires of the flJ control board on the door side, and sends setting No. 18 to the control board 7 using switches and iJ variable resistors (not shown), as well as LEDs, LCDs, etc. (not shown). Displays the status. Furthermore, a door body side coil 8 is wired from the control board 7 toward the vicinity of the main body, which serves both for power supply and signal transmission/reception. Drawing': Figure J7 is a top view of the second embodiment, showing the poor arrangement of the Moeki coil 6 and the coil 8. The main body side coil 6 and the door body side coil 8 are arranged close to each other.

Next, the operation of the second embodiment will be explained using FIG. 8.

In FIG. 8 of the drawing, power is supplied to the control board 5 on the main body 1 side from a commercial power source (not shown). This alternating current power is converted into voltage by the power supply circuit 5a, and part of the voltage is converted by the control board 5.
The other one is frequency-converted by the oscillation circuit 5b and flows to the coil 6 through the diode 5C. At this time, the microcomputer 5d encodes the data to be transmitted from the main body into a combination of "O" and "1" according to a predetermined method, and sends it to the oscillation circuit 5e. Here, the oscillation circuit 5e is set to “0”
A current flows intermittently in the coil 6 at the same frequency through the diode 5f, which alternates between operation and stop according to "1". Here, the oscillation frequency of the oscillation circuit 5b is lower than the oscillation frequency of the oscillation circuit 5e, and the power is greater. In this way, the power waveform of the oscillation circuit 5b is changed to the oscillation circuit 5e.
A waveform on which the signal waveform of is superimposed flows through the coil 6.

When the coil 6 oscillates at this frequency, a voltage of the same frequency is generated in the coil 8 due to mutual induction. A part of this voltage passes through a diode 7a as a power source, is selected by a band pass filter 7b, is made into a constant voltage by a constant voltage circuit 7c, and is supplied to the microcomputer 7e via a diode 7d as a power source for the control board 7 on the door side. At the same time, it passes through the diode 71 and charges the large capacitor 7j. The capacitance of this large-capacity capacitor 7j is selected to a value that is sufficient to drive the door-side control board 7 for a short time. Also, when the constant voltage circuit 7C is operating, the photocoupler 7g is connected through the resistor 7f.
A current flows through the light emitting diode of , the transistor of the photocoupler 7g is turned on, and the output of the photocoupler 7g becomes L level. Since the microcomputer 7e is connected to the photocoupler 7g, it detects this L level and knows that a constant voltage is being supplied. Further, the signal generated in the coil 8 passes through a diode 7m, a bandpass filter 7n, and is shaped by a waveform shaping circuit 7p into a waveform that can be read by the microcomputer 7e. The microcomputer 7e reads this signal and processes it according to a prescribed procedure.

Next, the microcomputer 5d on the main body side sends an off command to the oscillation circuit 5b and the oscillation circuit 5e every predetermined time period to stop the oscillation. Then, since the mutual induction effect disappears, no voltage is generated in the door body side coil 8, and the constant voltage circuit 7C also stops operating. At this time, no current flows to the light emitting diode of the photocoupler 7g.

The transistor of the photocoupler g is turned off, and the output of the photocoupler 7g becomes H level through the resistor 7h. The microcomputer 7e detects this and knows that the power supply has been stopped. However, even if the power supply is stopped, the large-capacity capacitor 7j is charged, so power continues to be supplied to the microcomputer 7e and the oscillation circuit 7k. Further, at this time, since the diodes 7d and 7i are present, current does not flow backward into the constant voltage circuit 7c.

Next, the microcomputer 7e receives the signal from the operation panel 4, stores it in its memory (not shown), and encodes the signal into a combination of "0" and "1" according to a predetermined procedure. Here, when the oscillation circuit 7k is repeatedly activated and stopped according to "0" and "1", a current flows through the diode 7IL and into the coil 8 based on the same frequency. At this time, a voltage of the same frequency is intermittently generated in the coil 6 due to mutual induction. This voltage does not go to the oscillation circuits sb and 5e because of the diode 5C95f, but is taken out from the diode 5g through the band pass filter 5h (No. E1) and shaped into a waveform that can be read by the microcomputer 5d by the waveform shaping circuit 5i.The microcomputer 5d Read this (No. 3) and process it according to the prescribed procedure.

At a predetermined time point around the end of the reading process, the oscillation circuit 5b
, 5e, and power supply starts again.

Next, the manner in which the power waveform and the signal waveform are superimposed on the control board 5 on the main body side and separated again on the control board 7 on the door body side will be explained using FIG. 9.

In FIG. 9, (A) is a power waveform generated by the oscillation circuit 5b, and (B) is a signal waveform generated by the oscillation circuit 5e.

Both the power waveform (A) and the signal waveform (B) are superimposed via diodes 5c and 5f to form the waveform (C), which flows to the coil 6. Similarly, coil 8 has a mutual induction effect (C)
A voltage with a waveform of is generated.

The voltage generated in the coil 8 passes through the diode 7a and passes through the bandpass filter b, allowing only the power component to pass (D
) and is supplied to the constant voltage circuit FC.

The remainder of the voltage generated in the coil 8 passes through the diode 7m and passes through the bandpass filter 70, where only the signal component passes, resulting in the waveform shown in (E).The waveform is further shaped by the waveform shaping circuit 7p, resulting in the pulse waveform shown in (F). and is loaded into My Computer.

Next, the power suspension period and the timing of sending a signal from the 1a1 board 7 on the door body side will be explained using FIG. (H) is the output signal waveform of photocoupler 7g, (
1) is the power waveform supplied from the door side to the main body side, (J)
indicate the potential of the large capacitor 7j, respectively. Now, when the power is turned on at 70, t. Power is supplied for 1.5 cycles from tl to t, and power supply is stopped for half a cycle from tl to t3.

That is, a half-cycle power supply suspension period is provided once every 1.5 cycles. This f5 cycle is a sufficient time to charge the large capacity capacitor 7j that drives the control board 7 on the door side.

When the power supply is stopped at time t3, the photocoupler 7g is turned off, and the output signal waveform (H) of the photocoupler becomes H level. This is detected by the microcomputer 7e, and a signal (1) is sent to the oscillation circuit 7k according to the stored data. ) is sent,
The door body side coil 8 transmits the signal and it is sent to the main body side. Microcomputer 7
In e, the transmission is completed at time t2 after a time shorter than the prescribed half cycle has elapsed, and the oscillation stops. Next, half a cycle has passed and at time 1, the microcomputer 5d issues an ON command again and the oscillation circuit 5d is driven. Then, the photocoupler 7g turns on and becomes the L level, which is detected by the microcomputer 7e and returns to normal operation.

During this time, the potential (J) of the large-capacity capacitor 7j is maintained at a value above the specified value, as shown in FIG.

As described above, according to the second embodiment, the high-frequency E-X signal can be superimposed on the power waveform from the main body side, and power and signals can be sent simultaneously.

Although the second embodiment has been explained using a refrigerator, it goes without saying that the present invention is not limited to this, and other electrical products may be used.

In addition, in Figure 10, the power is stopped for half a cycle every 1.5 cycles, but the power supply time is sufficient to supply power to the control board on the door side and charge the large capacity capacitor j. The stop time can also be changed as long as it is sufficient for signal transmission and reception and for the large capacitor 7j to maintain its potential.

Furthermore, although the second embodiment shows an example in which the power supply is stopped periodically, it may be stopped irregularly, or a storage battery may be used in place of the large capacity capacitor 7j.

(Effects of the Invention) As described above, according to the present invention, the wiring of the electrical product is not exposed to the outside of the main body and the door body, and thus the electrical product is inexpensive, has high reliability, and has a good appearance in terms of design. There is an effect that can be obtained. In addition, the configuration allows for mutual transmission and reception from both the main body side and the door body side, making it possible to not only send information from the operation panel but also display information from the main body side on the operation panel. In addition, the main body side coil and the door body side coil are configured as a pair consisting of one coil each, which has the effect of reducing the number of parts and making it possible to easily attach the coils.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing a first embodiment of the present invention, Fig. 2 is a plan view of the first embodiment, Fig. 3 is a control circuit configuration diagram of the first embodiment, and Fig. 4 is a diagram showing the first embodiment. FIG. 5 is a flowchart showing the receiving procedure of the first embodiment. FIG. 6 is a side sectional view showing the second embodiment of the invention. FIG. 7 is the second embodiment. 8 is a control circuit configuration diagram of the second embodiment, and FIG. 9 is a waveform diagram showing a state in which a signal waveform is superimposed on the power supply waveform of the second embodiment and separated again.
FIG. 10 is a time chart showing the power outage period and the state of sending signals from the control board in the second embodiment, and FIG. 11 is a partial perspective view of a conventional refrigerator. A・---Electrical product main body B------One body side coil C------ Door body side coil 1------Refrigerator body 2---One door body 4------ --- Operation panel 5, 8 --- Control board 6 --- Power supply coil 7 --- Signal reception coil 9 ... Power reception coil 0- ----- Signal receiving coil

Claims (2)

[Claims] (1) A main body of an electrical appliance; a door provided on the main body that can be opened and closed; a main body-side coil provided on the main body for transmitting and receiving alternating current electricity; and a coil provided on the door and at least the A control device for an electrical appliance, comprising: a door body side coil that can be inductively coupled to the main body side coil when the door body is closed, and that transmits and receives the alternating current amount of electricity. (2) The control device for an electrical product according to claim 1, wherein power and signals are exchanged by a combination of the main body side coil and the door body side coil.