JP3520204B2 - Washing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having a structure in which a washing machine motor is driven by an inverter.

[0002]

In recent years, a washing machine having a structure in which a washing machine motor is driven by a three-phase inverter is provided. In this type of washing machine, a noise filter is provided in order to prevent noise generated when the washing machine motor is driven from going out through the commercial power supply connection line. The noise filter is generally arranged immediately before the commercial power supply connection line goes out of the washing machine. The reason for this is to prevent noise from being re-affected by other electric wires before the commercial power supply connection line goes out of the washing machine after noise is suppressed by the noise filter.

However, in the above-described conventional structure, the noise filter is arranged in the portion just before the commercial power supply connecting line goes out of the washing machine, and the inverter power supply is provided inside the top cover of the upper part of the washing machine body. Since the layout is separated from the circuit and the main inverter circuit, the structure becomes complicated, and the assembly becomes troublesome and the cost becomes high.

On the other hand, a noise filter is provided in the top cover together with an inverter power supply generation circuit, an inverter main circuit, etc., and in the top cover, a motor power supply line, etc. is connected to a commercial power supply line that goes out of the washing machine from the noise filter. It is possible to wire the other electric wires such as the commercial power supply connection line and the motor connection line separately on both sides of the laundry entrance / exit by wiring the other electric wire on the opposite side across the laundry entrance / exit. To be However, in this case, the wiring structure is complicated and the cost is also high.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent noise from going out through a commercial power supply connecting line, and to simplify the structure to reduce the cost. It is to provide a washing machine that can.

[0006]

In order to achieve the above object, the invention of claim 1 is a washing machine having a structure in which a motor of a washing machine is driven by an inverter, which has a laundry loading / unloading opening. Inside the top cover provided at the top of the machine body,
A noise filter circuit to which a commercial power supply connecting line for commercial power supply connection is connected, an inverter power supply generation circuit that is connected to this noise filter circuit, and that generates a DC inverter power supply from the commercial power supply, and this inverter power supply generation circuit An inverter main circuit for driving the washing machine motor with the controlled inverter power supply, and a control circuit for controlling the inverter main circuit, and between the commercial power supply connection line, the inverter main circuit and the washing machine motor. And a motor connection wire connected to, while being located in the top cover on one side around the laundry entrance and exit,
At the portion in the top cover where the commercial power supply connection line and the motor connection line are wired in parallel, a holding hand
It is characterized in that the wiring is performed in a state in which they are separated by a certain distance or more by a step .

According to this, in the portion of the top cover where the commercial power supply connection line connected to the noise filter circuit and the motor connection line that is apt to generate noise are wired in parallel, they are separated by a certain distance or more. By doing so, even if they are wired in parallel, the commercial power connection line is less susceptible to the noise from the motor connection line, thus preventing noise from going out through the commercial power connection line. become able to.

Since the noise filter circuit can be arranged in the top cover together with the inverter power supply generation circuit, the inverter main circuit, the control circuit, etc., it has been necessary to arrange the noise power supply circuit immediately before the commercial power supply connection line goes out of the washing machine. Unlike the prior art, it is not necessary to separate the inverter power supply generation circuit and the like, and the structure can be simplified. Further, since the commercial power supply connection line and the motor connection line that easily generates noise are wired on one side around the laundry entrance / exit in the top cover, the commercial power supply connection line and the motor connection line are connected. Unlike the case where the other electric wires are separately provided on both sides of the laundry entrance and exit, the wiring structure can be simplified.

[0009]

In this case , the output side of the inverter power supply generation circuit is provided with a DC power supply generation circuit for converting the output voltage of the inverter power supply generation circuit into a power supply voltage of a control circuit and the negative side of the inverter main circuit. In the case where a resistance for inverter current detection is provided on the power supply line, connect the negative side terminal of the DC power generation circuit and one end of the resistance for inverter current detection to the negative side power supply line of the inverter power generation circuit. It is preferable to connect to the ground point of (the invention of claim 2 ). According to this, the influence of noise generated from the DC power supply generation circuit, which is one of the noise generation sources, is less likely to affect the inverter current detection resistor side.

Further, the inverter power generation circuit and the inverter main circuit are provided on different printed boards, and the positive side connection terminal and the negative side connection terminal of the printed board on the side of the inverter power generation circuit and the positive side input terminal of the inverter main circuit are provided. And the negative side input terminal are respectively connected by a lead wire, and the negative side power supply line of the control circuit is preferably connected between the negative side input terminal of the inverter main circuit and the inverter current detecting resistor (claim). Invention of 3 ).

In addition, in a device provided with an LED drive circuit for driving a display LED, the negative side power supply line of this LED drive circuit is commonly used with the negative side power supply line of the control circuit,
It is preferable that the connection point of the D drive circuit to the negative power supply line is set closer to the negative power supply line side of the inverter main circuit than the control circuit (the invention of claim 4 ).

[0013]

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. First, FIG. 2 shows an overall schematic configuration of a washing machine (fully automatic washing machine) according to this embodiment. In FIG. 2, the outer box 2 of the washing machine body 1 is formed of a steel plate into a substantially rectangular tube shape, and is joined on a plastic base plate 3. In the outer box 2, an outer tub 4 which constitutes a water receiving tub is elastically suspended by a hanging mechanism 5.
It is arranged through. An inner tank 6 that doubles as a washing tank and a dehydration tank is rotatably provided in the outer tank 4, and an agitator 7 for generating a water flow is disposed at the inner bottom portion of the inner tank 6.

A drive mechanism 8 is provided on the outer bottom of the outer tub 4. The drive mechanism 8 includes a washing machine motor 9 composed of an inverter-driven outer rotor type three-phase brushless motor, and a rotor shaft 10 of the washing machine motor 9 is directly connected to the agitator 7 and is connected to the shaft 10. A hollow shaft 11 inserted through a clutch is directly connected to the inner tank 6. The drive mechanism 8 causes the stirring body 7 to rotate in the forward and reverse directions during the washing and rinsing strokes, and the inner tank 6 and the stirring body 7 can rotate at high speed during the dehydration and dehydration rinsing strokes. It is designed to be rotated.

A drain port 1 is provided at the right end of FIG. 2 at the bottom of the outer tank 4.
2, a drain valve 13 is provided at the drain port 12, and a drain hose 14 is connected to the drain port 12. An auxiliary drainage port 15 is formed at the left end in FIG. 2 of the bottom of the outer tub 4, and the auxiliary drainage port 15 is connected to the drainage hose 14 via a connecting hose (not shown).
The inner tank 6 is provided with a balance ring 16 at an upper end portion thereof, a dehydration hole 17 is provided at an upper portion of a peripheral wall portion thereof, and an inner peripheral portion having a large number of dehydration holes (not shown). A basket 18 is provided.

A plastic top cover 19 is provided on the upper portion of the washing machine body 1. As shown in FIG. 1, the top cover 19 is in the form of a frame having a laundry loading / unloading opening 20 in the center and a top cover main body 22 having a recessed portion 21 having an open top at the front, and a top cover main body 22. The cover main body 22 includes a control panel 23 mounted on the front upper surface of the cover main body 22 so as to cover the recess 21, and a rear cover 24 mounted on a rear portion of the top cover main body 22. The laundry loading / unloading opening 20 is opened / closed by a two-foldable lid 25 (see FIG. 2).

At the lower left part and the lower front part of the control panel 23, first and second electronic units 26 and 27 are provided.
And the first and second electronic units 26 and 27 are housed in the recess 21. On the upper surface of the front part of the control panel 22, a power switch 28, a start / pause switch 29,
Other switches 30 and a display LED (light emitting diode) 31 are provided. The first electronic unit 26 includes a noise filter circuit 3 as described later.
2 and an inverter power supply generation circuit 33 are provided, and the second electronic unit 27 includes an inverter main circuit 3
4 and a control circuit 35 are provided. In the top cover main body 22, a water supply valve (not shown) is provided below the rear cover 24.

In the top cover main body 22, a commercial power source connecting line 36 connected to a commercial power source and a motor connecting line connected to the washing machine motor 9 are provided on the left side which is one side around the laundry entrance 20. 37 and another connecting wire 38 connected to the drain valve 13 and the water supply valve are wired in the front-rear direction so as to be in parallel.

Of these, one end of the commercial power supply connection line 36 is connected to the first electronic unit 2 via the connector 36a.
6 is connected to the connector 39, and the other end is led out of the washing machine from the rear part of the top cover body 22. Further, one end of the motor connection line 37 is connected to a connector (not shown) of the second electronic unit 27 via the connector 37a, and the other end is connected to the top cover body 22 as shown in FIG. It is bent downward from the rear part and is connected to the washing machine motor 9 in the outer box 2. Further, one end portion of the other connection line 38 has a connector (not shown) of the second electronic unit 27 via the connector 38a.
The other end of the top cover body 22 is connected to a target device (the drain valve 13 or the water supply valve).

Here, as shown in FIG. 3, the concave portion 21 in the top cover body 22 constitutes a holding means 2.
The individual hooks 40 and 41 are integrally provided, and a reinforcing rib 42 is provided below the left rear portion 22a of the top cover body 22. The reinforcing rib 42 also constitutes a holding means. Individual holding holes 43a and 43b are formed. The commercial power supply connection line 36 is wired while being retained in the left hook 40 and the left holding hole 43a, and the motor connection line 37 and the other connection line 38 are connected to the right hook 41 and the right side. Holding hole 4
3b, the commercial power source connection line 36, the motor connection line 37, and the other connection line 38 are separated from each other by a certain distance or more in a portion where they are wired in parallel. ing.

On the other hand, FIG. 4 shows an electrical structure of a portion related to the gist of the present invention. In this FIG.
The noise filter circuit 32 includes capacitors 46 and 47 connected in parallel between both power supply lines 45a and 45b connected to the commercial power supply connection line 36, a series circuit of capacitors 48 and 49, and capacitors 46 and 47. And a common mode choke coil 50 connected to both power supply lines 45a and 45b, and the common connection point of the capacitors 48 and 49 connected in series is grounded.

The inverter power supply generation circuit 33 is for generating a DC inverter power supply from an AC commercial power supply, and comprises a full-wave rectification circuit 51 for full-wave rectifying the commercial power supply and two smoothing capacitors 52, 53. It is configured. A reactor 54 is provided between one power supply line 45a of the noise filter circuit 32 and one input terminal of the full-wave rectification circuit 51, and the other power supply line 45b of the noise filter circuit 32 and the full-wave rectification circuit 51. The power switch 28 (see FIG. 1) is provided between the other input terminal and the other input terminal.

Then, the inverter power supply generation circuit 33
A DC power supply generation circuit 55 that converts the output voltage of the inverter power supply generation circuit 33 into 5 V and 12 V is provided on the output side of the. Positive side terminal 5 of this DC power supply generation circuit 55
5a is a positive power supply line 56 of the inverter power generation circuit 33.
The negative side terminal 55b of the DC power supply generation circuit 55 connected to a
Is connected to the ground point 57 of the negative power supply line 56b of the inverter power supply generation circuit 33.

Here, the noise filter circuit 32, the inverter power supply generation circuit 33, and the DC power supply generation circuit 55 are provided on one printed circuit board 58. The printed circuit board 58 has a positive side connecting terminal 59a connected to the positive side power source line 56a of the inverter power source generating circuit 33 and a negative side connecting terminal 59b connected to the negative side power source line 56b of the inverter power source generating circuit 33. Is provided. The power switch 28 and the reactor 54 are connected to the printed circuit board 5
It is provided in a part different from 8.

The inverter main circuit 34 is a printed circuit board 6 different from the printed circuit board 58 on the noise filter circuit 32 side.
It is set to 0. The inverter main circuit 34 includes six switching elements 61, which are IGBTs in this case, which are three-phase bridge connected, and the output terminals are connected to the washing machine motor 9 through the motor connection line 37. . The positive power supply line 62a of the inverter main circuit 34 is connected to the positive input terminal 63a, and the negative power supply line 62b is connected to the negative input terminal 63b. This positive input terminal 63
a and the positive side connection terminal 59a of the printed circuit board 58 on the side of the inverter power supply generation circuit 33, and the negative side input terminal 6
3b and the negative side connection terminal 59b are connected by lead wires 64a and 64b, respectively.

The negative power supply line 62b of the inverter main circuit 34
An inverter current detection resistor 65 is connected to
One end of the inverter current detection resistor 65 is connected to the ground point 57 of the negative power supply line 56b of the inverter power generation circuit 33 via the lead wire 64b.

The control circuit 35 is the microcomputer 6
6, an inverter current detection circuit 67, an inverter voltage detection circuit 68, an inverter drive circuit (not shown), and the like. Of these, the inverter current detection circuit 67 detects the current flowing through the washing machine motor 9 through the inverter current detection resistor 65, and the inverter voltage detection circuit 68 detects the voltage supplied to the washing machine motor 9. .

Here, the negative power supply line 69 of the control circuit 35.
Is shared with the negative side power supply line of the LED drive circuit 70 for driving the display LED 31, and the negative side power supply line 69 is connected to the negative side input terminal 63b of the inverter main circuit 34 and the inverter current detection resistor. It is connected to 65. The connection point 70a of the LED drive circuit 70 to the negative power supply line 69 is set closer to the negative power supply line 62b of the inverter main circuit 34 than the control circuit 35.
The control circuit 35 controls the negative power supply line 6 of the inverter main circuit 34.
It is arranged in the latter stage of the LED drive circuit 70 with respect to 2b. Although not shown, the positive power supply lines of the control circuit 35 and the LED drive circuit 70 are the DC power supply generation circuit 55.
Is connected to the positive output terminal of.

The washing machine motor 9 is provided with a rotation sensor 71 for detecting the rotational position of the rotor, and the signal of the rotation sensor 71 is input to the microcomputer 66. In addition, the microcomputer 66
In addition to the start / temporary stop switch 29 and other switches 30, signals such as a water level switch and a lid switch, which are not shown, are input to the device via the switch circuit 72.

Then, the microcomputer 66, based on the signals from the respective switches, the signal from the rotation sensor 71, the signals from the inverter current detection circuit 67 and the inverter voltage detection circuit 68, and the preset program, the inverter main The drive of the washing machine motor 9 is controlled by controlling the circuit 34, and the LED drive circuit 7
It has a function of driving and controlling the LED 31 via 0, and also controlling the water supply valve and the drain valve 13.

In the above structure, the top cover 1
In FIG. 9, a commercial power supply connection line 36 connected to the noise filter circuit 32 and a motor connection line 37 and another connection line 38, which are particularly prone to noise, are arranged in parallel at a portion where they are separated by a certain distance or more. By doing so, even if they are wired in parallel, the commercial power supply connection line 36 is less likely to be affected by noise from the motor connection line 37 and other connection lines 38, so that noise is reduced. It will be possible to prevent going out through the.

Since the noise filter circuit 32 can be arranged in the top cover 19 together with the inverter power supply generation circuit 33, the inverter main circuit 34, the control circuit 35, etc., the noise power supply circuit 32 is arranged immediately before the commercial power supply connection line goes out of the washing machine. Unlike the conventional case where it is necessary to do so, it is not necessary to separate from the inverter power supply generation circuit 33 and the like, and the structure can be simplified. In addition, the commercial power connection line 36
And the motor connection line 37 and the other connection line 38 that easily generate noise are wired on one side around the laundry entrance / outlet 20 in the top cover 19, so that the commercial power supply connection line Unlike the case of wiring separately from other electric wires such as motor connection wires on both sides of the laundry entrance,
The wiring structure can also be simplified.

Further, in the above embodiment, the noise filter circuit 32, the inverter power supply generation circuit 33,
Since the DC power supply generation circuit 55 and the single printed circuit board 58 are provided, further compactness can be achieved.

The negative side terminal 55b of the DC power supply generation circuit 55 and one end of the inverter current detection resistor 65 are connected to the ground point 57 of the negative side power supply line 56b of the inverter power generation circuit 33. As a result, the influence of noise generated from the DC power supply generation circuit 55, which is one of the noise generation sources, is less likely to affect the inverter current detection resistor 65 side.

The inverter power supply generation circuit 33 and the inverter main circuit 34 are provided on separate printed circuit boards 58 and 60, and the positive side connection terminal 59a and the negative side connection terminal 59 of the printed circuit board 58 on the inverter power supply generation circuit 33 side are provided.
b and the positive side input terminal 63a and the negative side input terminal 63b of the inverter main circuit 34 are lead wires 64a and 64b, respectively.
Since the negative side power supply line 69 of the control circuit 35 is connected between the negative side input terminal 63b of the inverter main circuit 34 and the inverter current detection resistor 65, the negative side power supply line of the control circuit 35 is connected. The distance between the connection point of the line 69 to the inverter main circuit 34 and the inverter current detection resistor 65 can be shortened, and the influence of noise between them can be prevented as much as possible.

Moreover, the negative side power supply line of the LED drive circuit 70 is shared with the negative side power supply line 69 of the control circuit 35, and the connection point 70a to the negative side power supply line of the LED drive circuit 70 is connected to the inverter main unit rather than the control circuit 35. Negative power supply line 62 of circuit 34
Since the control circuit 35 is set on the b side and is arranged in the latter stage of the LED drive circuit 70 that consumes a large amount of current, the control circuit 35 is arranged behind the negative power supply line 62b of the inverter main circuit 34. It will be possible to make it less susceptible to the ripple that occurs in.

Here, in FIG. 5, (a) shows the ripple waveform of the power supply voltage of the microcomputer 66 in this embodiment, and (b) shows the ripple waveform of the power supply of the microcomputer in the comparative example with respect to this embodiment. ing. Further, FIG. 6 shows an electrical configuration in the comparative example. The comparative example of FIG. 6 is different from the case of the present embodiment in the following points. That is, the negative power supply line 69 of the control circuit 35 including the microcomputer 66.
Is connected to the negative side terminal of the DC power supply generation circuit 55, and the LED drive circuit 70 is arranged at the subsequent stage of the control circuit 35.

As is clear from FIG. 5, in the comparative example, the peak-to-peak width was about 0.15 V, whereas in the present embodiment, the peak-to-peak width was about 0.
It is 05 V, which means that the present embodiment is less susceptible to ripple.

On the other hand, FIG. 7 shows a second embodiment of the present invention. This second embodiment differs from the above-mentioned first embodiment in the following points. That is, the top cover body 2
In place of the two hooks 40 and 41, the recess 21 in FIG. 2 is provided integrally with two ribs 75 and 76 that form a holding means. , Motor connecting wire 37 and other connecting wires 3
And 8 are separated from each other by a certain distance or more.

FIG. 8 shows a third embodiment of the present invention. This third embodiment differs from the above-mentioned first embodiment in the following points. That is, two hooks 77, 78 are provided on the side wall of the recess 21 in the top cover body 22, and the commercial power supply connection line 36 is held by one of the hooks 77, for example, by a bind wire 79, and the motor connection wire 37. And the other connecting wire 38 are held by the other hooking portion 78 by, for example, a band 80, whereby the commercial power supply connecting wire 36 is separated from the motor connecting wire 37 and the other connecting wire 38 by a certain distance or more. is doing. In this case, the hook portion 77 and the bind wire 79 constitute a holding means on the commercial power source connection line 36 side, and the hook portion 78 and the band 80 hold the motor connection line 37 and the other connection line 38 side. Constitutes a means.

FIG. 9 shows a fourth embodiment of the present invention. This fourth embodiment differs from the above-mentioned first embodiment in the following points. That is, a separate member 82 (corresponding to a holding means) having C-shaped holding portions 81a and 81b on both sides is provided between the commercial power source connecting line 36 and the motor connecting line 37 and the other connecting line 38. Connection line 36
Is held in one holding portion 81a, and the motor connecting wire 37 and the other connecting wire 38 are held in the other holding portion 81b, so that the commercial power supply connecting wire 36, the motor connecting wire 37 and the other connecting wire 38 are held. And are separated by a certain distance or more.

[0043]

[0044]

[0045]

As is apparent from the above description, according to the present invention, the following effects can be obtained. Claim 1
According to the washing machine of, in the top cover, the commercial power supply connection line connected to the noise filter circuit and the motor connection line that easily generates noise are arranged in parallel at a certain distance or more. By putting
The commercial power supply connection line is less likely to be affected by noise from the motor connection line, so that it is possible to prevent noise from going out through the commercial power supply connection line. Since the noise filter circuit can be arranged in the top cover together with the inverter power supply generation circuit, the inverter main circuit, the control circuit, etc., the structure can be simplified and the cost can be reduced. Further, since the commercial power supply connection line and the motor connection line that easily generates noise are wired on one side around the laundry entrance / exit in the top cover, the commercial power supply connection line and the motor connection line are connected. Unlike the case where the other electric wires are separately provided on both sides of the laundry entrance and exit, the wiring structure can be simplified.

[0046] According to 請 Motomeko 2 of the washing machine, the influence of noise generated from is one DC power generating circuit of the source of noise, it becomes possible to Oyobi difficult to inverter current sensing resistor side.

According to the washing machine of the third aspect , the distance between the connection point of the negative side power source line of the control circuit to the inverter main circuit and the inverter current detecting resistor can be shortened, and the influence of noise between them can be reduced. It is possible to prevent being received as much as possible.
According to the washing machine of the fourth aspect , since the control circuit is arranged in the latter stage of the LED drive circuit, which consumes a large amount of current, with respect to the negative-side power supply line of the inverter main circuit, the control circuit generates the power supply. You will be less susceptible to the effects of ripple .

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing a first embodiment of the present invention.

[Figure 2] Vertical side view of the entire washing machine

FIG. 3 is an enlarged perspective view of a fracture of an essential part.

FIG. 4 is a diagram showing an electrical configuration.

5A and 5B are diagrams showing a ripple waveform of a power supply voltage of a microcomputer, where FIG. 5A is a ripple waveform in the case of the present embodiment, and FIG. 5B is a ripple waveform in the case of a comparative example.

FIG. 6 is a view corresponding to FIG. 4 of a comparative example with respect to the present embodiment.

FIG. 7 is a perspective view of a main part showing a second embodiment of the present invention.

FIG. 8 is a perspective view of an essential part showing a third embodiment of the present invention.

FIG. 9 is a perspective view of an essential part showing a fourth embodiment of the present invention.

[Explanation of symbols]

1 is a washing machine body, 9 is a washing machine motor, 19 is a top cover, 20 is a laundry loading / unloading opening, 22 is a top cover body,
23 is a control panel, 26 is a first electronic unit, 27 is a second electronic unit, 31 is an LED, 32 is a noise filter circuit, 33 is an inverter power supply generation circuit,
34 is an inverter main circuit, 35 is a control circuit, 36 is a commercial power supply connection line, 37 is a motor connection line, 38 is another connection line, 40 and 41 are hooks (holding means), 42 is a reinforcing rib, and 43a and 43b are Holding hole (holding means), 55 is a DC power supply generation circuit, 55a is a positive side terminal, 55b is a negative side terminal,
56a is a positive power supply line, 56b is a negative power supply line, 57 is a ground point, 58 is a printed circuit board, 59a is a positive connection terminal,
59b is a negative side connection terminal, 60 is a printed circuit board, 61 is a switching element, 62a is a positive side power supply line, 62b is a negative side power supply line, 63a is a positive side input terminal, 63b is a negative side input terminal,
64a and 64b are lead wires, 65 is an inverter current detection resistor, 66 is a microcomputer, 67 is an inverter current detection circuit, 68 is an inverter voltage detection circuit, 69 is a negative side electric wire, 70 is an LED drive circuit, and 70a is a connection point. ,
75 and 76 are ribs (holding means), 77 and 78 are hooking portions (holding means), 79 is a bind wire (holding means), 80 is a band (holding means), and 82 is a separate member (holding hand).
Column) .

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoru Matsumoto 991, Anada-cho, Seto-shi, Aichi Toshiba Abu E Co., Ltd., Nagoya Office (56) Reference JP-A-9-285687 (JP, A) ) JP-A-3-284286 (JP, A) JP-A-8-66590 (JP, A) JP-A-9-69601 (JP, A) Actually open 59-127571 (JP, U) Actually open 3- 62575 (JP, U) Actual Kaihei 4-116971 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) D06F 37/40 D06F 39/00 H02P 5/41 302

Claims (4)

(57) [Claims] 1. A washing machine having a structure in which a washing machine motor is driven by an inverter, wherein a commercial power source connection for connecting a commercial power source is provided in a top cover provided at an upper portion of a washing machine body having a laundry loading / unloading opening. The noise filter circuit to which the line is connected, the inverter power supply generation circuit that is connected to the noise filter circuit, and that generates a DC inverter power supply from the commercial power supply, and the inverter power supply generated by this inverter power supply generation circuit An inverter main circuit for driving the machine motor, and a control circuit for controlling the inverter main circuit, the commercial power supply connection line, and a motor connection line connected between the inverter main circuit and the washing machine motor. Is located on one side around the laundry entrance / exit in the top cover and is wired in the top cover.
The washing machine is characterized in that the commercial power source connecting line and the motor connecting line are wired in parallel at a portion where they are separated from each other by a holding means in a state where they are separated by a predetermined distance or more. 2. The output side of the inverter power generation circuit is connected to the output side.
Output voltage of inverter power supply generation circuit of control circuit etc.
A DC power supply generation circuit that converts power supply voltage is provided
In addition, the negative power line of the inverter main circuit has an inverter
A current detection resistor is provided, and the negative side terminal of the DC power supply generation circuit and the inverter power supply are connected.
One end of the current detection resistor is connected to the inverter power generation circuit.
The washing machine according to claim 1, wherein the washing machine is connected to a ground point of a negative power line of the road . 3. An inverter power generation circuit and an inverter main
It is provided on a separate printed circuit board from the circuit,
Inverter power generation circuit side printed circuit board positive side connection end
Child and negative side connection terminal and positive side input terminal of the inverter main circuit
And the negative input terminal are connected by lead wires.
Have been, the negative power supply line of the control circuit, the negative side of the inverter main circuit
Connected between the input terminal and the inverter current detection resistor.
And washing machine according to claim 2, wherein a has. 4. An LED drive circuit for driving a display LED.
And the negative side power line of this LED drive circuit is controlled.
It is shared with the negative power supply line of the control circuit,
The connection point for the negative side power line of the drive circuit is
The washing machine according to claim 3 , wherein the washing machine is set on the negative power line side of the inverter main circuit .