JPH01102000A - centrifugal dehydrator - Google Patents

Abstract

PURPOSE: To smoothly activate a dehydration basket by providing a vibration type angular velocity sensor for detecting the swing of a driving shaft and a means for receiving signals from the sensor and controlling the swing. CONSTITUTION: This machine is provided with a main body, a driving motor 2 attached inside the main body through a spring 6 and the dehydration basket where the driving shaft 3 of the driving motor 2 is fixed to a bottom part. Then, an angular velocity sensor 8 and an actuator 9 are arranged in at least one direction in the direction orthogonal to the driving shaft 3. That is, even when clothes or the like are localized and put into the dehydration basket, the swing is detected from the time of activation by the angular velocity sensor 8. By receiving swing signals from the sensor 8, in the actuator 9, force for canceling the swing is added to the driving shaft 3 and dehydration is smoothly activated.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a centrifugal dehydrator for dehydrating clothes and the like.

2. Prior Art A conventional centrifugal dehydrator of this type had a structure as shown in FIG. That is, within the main body 1, a drive shaft 3 of a drive motor 2 is attached to the bottom of a dehydration basket 4, and the dehydration basket 4 is rotated at high speed by the drive motor 2 to perform dewatering.

Problems to be Solved by the Invention However, with such a structure, if rinsed clothes 5 containing water are placed unevenly in the dehydration basket 4 as shown in the figure, the dehydration basket 4 cannot be started smoothly. There was a problem in that the clothing 5 could not be moved and the clothing 5 had to be properly positioned and restarted. This is due to the following reasons.

In other words, when the clothes 5 are placed in the spin-drying basket 4 in a biased manner, the moment acting on the clothes 5 at the time of startup causes the spin-drying basket 4 to receive an eccentric force toward one direction on the outer periphery.

On the other hand, the drive motor 2 that drives the dewatering basket 4 is swingably fixed via a spring 6 so as not to transmit vibrations to the main body 1, so that the eccentric force causes the dehydrating basket 4 to absorb water located on its outer periphery. It collides with the receiving basket 7, and this collision causes the rotational speed to drop extremely, and when it starts rotating again, it collides again, causing the rotational speed to drop to its lowest point.This repetition makes it impossible to start up smoothly.

Therefore, the present invention prevents the dehydration basket from colliding with the outer wall surface (the water receiving basket 7 in the conventional example) when starting up the dehydration basket, even if clothes etc. are placed unevenly in the dehydration basket. This enables smooth startup of the system.

Means for solving the problems and technical means of the present invention for solving the above problems include a vibration type angular velocity sensor for detecting the swing of the drive shaft, and receiving a signal from the detection signal to control the swing. It consists of means.

action The effect of this technical means is as follows.

In other words, even if clothes or the like are placed unevenly in the dehydration basket, the present invention simply receives a rocking signal from the angular velocity sensor that detects rocking from the time of startup, and cancels the rocking from the rocking control section. By applying force to the drive shaft, the dewatering basket can be started smoothly without hitting the outer wall when it is started.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, 8 is an angular velocity sensor, and the vibration type angular velocity sensor 8 is fixed to the drive motor 2.

This vibration-type angular velocity sensor vibrates the detection part at a certain frequency, and uses phase separation to detect the velocity of the detection part based on this vibration and the Coriolis force that is applied to the inertial coordinate system of the entire detection means, and to suppress the vibration. It is output as an angular velocity signal. This will be explained in detail using FIG. Swinging involves rotation around the drive shaft Z at a certain angle θ. The components at this time can be divided into the X-axis direction and the Y-axis direction perpendicular to the driving axis Z and the X-axis direction.

That is, it is detected as an angular velocity appearing on the X-axis at an angle θ with the swing center Zo as the center, and an angular velocity appearing on the Y-axis at an angle θ.

The output from the angular velocity sensor becomes an electrical signal proportional to the angular velocity. The obtained electric signal is fed back to the actuator 9, and a force acts on the actuator 9, so that the output of the angular velocity sensor 8 becomes zero.

Next, the operation of the configuration of this embodiment will be explained.

First, a case will be described in which the clothes are normally placed in the dehydration basket without being biased. In this case, when the drive motor 2 is energized, the dehydration basket 4 rotates at high speed, and the water contained in the clothes is scattered by centrifugal force from the drainage hole onto the inner peripheral surface of the outer water receiving basket 7, thereby performing dehydration.

A case where clothes are placed unevenly in the next dehydration basket 4 will be explained. In this case, the moment of inertia acting on the clothes placed in the dehydration basket causes them to begin to oscillate. This swing also appears in the drive motor 2 supported by the spring 6. However, the angular velocity sensor 8 attached to the upper part of the drive motor 2 detects this, and the actuator 9 performs suppression control, so that the eccentric force that attempts to eccentricize the dewatering basket is weakened.

As a result, the dewatering basket 4 can be started smoothly, and there is no inconvenience as in the conventional case where the clothes have to be properly positioned and restarted.

Also, in this embodiment, the angular velocity sensor is mounted on the drive motor, but the effect is the same as in the embodiment, as long as the vibration from the center of rotation can be detected on the X-axis and Y-axis. The effect of this can be obtained.

Since the angular velocity sensor is a vibration-type angular velocity sensor using a piezoelectric element, it is small and lightweight, so it can be said that there are no restrictions on the mounting position. Furthermore, since it can be manufactured at low cost, cost increases can be minimized.

Effects of the Invention The present invention includes a main body, a drive motor attached to the main body via a spring, and a dewatering basket having a drive shaft of the drive motor fixed to the bottom thereof, and at least one shaft in a direction orthogonal to the drive shaft. By installing a function to detect and control the shaking of the spinner basket by placing an angular velocity sensor and an actuator in the direction, it is possible to smoothly start the spinner even if the spinner basket is loaded unevenly with clothes. can get.

Moreover, since it is possible to suppress the rocking of the centrifugal dehydrator main body, it is also possible to obtain the effect of reducing noise during operation.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cross-sectional view of the drive part of a centrifugal dewatering basket according to an embodiment of the present invention, Fig. 2 is a principle diagram of rocking detection of the present invention, and Fig. 3 is a cross-sectional view showing a conventional centrifugal dehydrator. . 1... Body, 2... Drive motor, 3.
... Drive shaft, 4 ... Dehydration basket, 5 ...
...Clothing, 6...Spring, 7...
・Water basket, 8... Angular velocity sensor, 9...
...actuator. Name of agent: Patent attorney Toshio Nakao, and one other person 8--Tatsu Ikkaku, Tatsunsa No. 1 Figure 9-11 Acti-Unique N2 Diagram/-11 4 2-, Connector Camoder 3-Drive Shaft 4- One theory: water... 6---Clothing

Claims (2)

[Claims] (1) A main body, a drive motor attached to the main body via a spring, and a dewatering basket to which a drive shaft of the drive motor is fixed to the bottom, and has an angular velocity in at least one direction orthogonal to the drive shaft. A centrifugal dewatering machine that has the function of detecting and controlling the shaking of the dewatering basket by arranging sensors and actuators. (2) A patent claim characterized in that the swing detection means has a vibrating angular velocity sensor configured to detect Coriolis force generated based on rotational motion relative to an inertial system and generate a swing detection signal. The centrifugal dehydrator according to the range (1) above.