KR200437631Y1 - Control and protect apparatus for motor of whirlpool bathtub - Google Patents

Abstract

 The present invention detects the current of single-phase motor main winding and auxiliary winding of whirlpool bathtub at high speed in real time, and analyzes the cause of failure such as inrush current, short circuit, overload, etc. The present invention relates to a whirlpool bath control and safety device that protects the motor and protects the burnout and life of the motor by protecting the power supply and the control device and monitoring the minute water leakage at the bottom of the bathtub to cut off the main power when an abnormality is detected.

The present invention for this purpose and the current sensor for sensing the current input from the AC power source; An immersion sensor for detecting leaks or immersions; A water level sensor for detecting a water level in the bathtub; A temperature sensor for sensing an ambient temperature; A humidity sensor that detects ambient humidity; A display unit for displaying a current starting state; A communication unit for transmitting a current starting state; The control device is configured to include a motor starting control unit for driving a whirlpool motor and a microcomputer to collectively control the operation of each circuit unit.

Whirlpool bathtub, controller, motor start controller, immersion sensor, home network server

Description

Control and protect apparatus for motor of whirlpool bathtub}

1 is a circuit configuration diagram of a conventional whirlpool starting device.

Figure 2 is a block diagram of a whirlpool bathtub control and safety device according to the present invention.

Figure 3 is a detailed block diagram of a whirlpool bathtub control and safety device according to the present invention.

4 is a circuit diagram of an embodiment of the motor starting control unit of FIG. 3.

5A and 5B are circuit diagrams of an embodiment of the submersion sensor of FIG. 3.

Explanation of symbols on the main parts of the drawings

10: controller 20: whirlpool motor

30: home network server 101: current sensor

102: immersion sensor 102a: capacitive switch

102b: frequency generator 103: water level sensor

104: temperature sensor 105: humidity sensor

106: display unit 107: communication unit

108: motor starting control unit 108a: rectifier

108b: inverter section 109: microcomputer

The present invention relates to the control and safety device for the whirlpool bathtub, and more specifically, to detect the current of the single-phase motor main winding and auxiliary winding of the whirlpool bathtub at high speed in real time to analyze the cause of failure such as inrush current, short circuit, overload, and more. Measures according to the diagnosis, protects the main parts and control device of expensive whirlpool bathtub, monitors minute leakage of water in the bottom of the bathtub, cuts off the main power when detecting abnormalities, and controls the whirlpool bathtub to protect the motor from burning and human life. And a safety device.

As is well known, whirlpool baths are used in more harsh environments than in general industrial environments.

The main parts and controllers of the whirlpool bathtub are located in the lower part of the bathtub and are exposed to a lot of moisture and dust, and when the pipe connection part of the cold and hot water is aged and leaked, the motor and the main control device may be damaged by excessive moisture. . In addition, when the drain connected to the bathtub is blocked, accidents such as flooding due to the backflow of the bath water may occur, and in the worst case there was a problem that may cause electrocution of the bather.

1 shows a circuit configuration diagram of a conventional whirlpool starting device, and includes a main winding M1, an auxiliary winding M2, a centrifugal force switch S2, and a starting capacitor C1 when the starting switch S1 is turned on. The single phase induction motor configured in this way is driven.

However, the conventional whirlpool starting device adopts a capacitor starting method, and is used without interrupting the starting capacitor C1 even after normal operation.

In addition, the single-phase induction motor used as a whirlpool motor has a starting torque of zero when the initial power is applied due to the harmony of the normal torque and the reverse phase torque.

Therefore, the starter is started as a two-phase induction motor at start-up using the auxiliary winding M2 for the initial start-up of the single-phase induction motor. In order to satisfy this, the starting capacitor C1 is serially connected to the auxiliary winding M2. Although the phase difference is started and started, since the function of the capacitor C1 is not required after the start, a device for separating the auxiliary winding M2 from the main winding M1 is required when the start is completed.

However, since the conventional whirlpool starting device is not provided with a separating device, there is a problem in that the starting capacitor is easily burned out when the motor shaft is constrained by not using the motor for a long time or inflow of inrush current or overcurrent.

Whirlpool motor failures are classified into overload, inrush current and large surge current.

Compared to the whirlpool bathtubs that are frequently used in public places (hotels and motels), the whirlpool bathtubs, which have been widely used recently, have a large moment of inertia due to rust or lubrication of the driving parts due to not being used for a long time. Overcurrent flows through the windings. This overcurrent causes a major breakdown of the whirlpool motor. There is no countermeasure when the motor is physically constrained. However, starting the motor gradually to prevent large inrush current and starting it is very important for protecting the motor, and can prevent the destruction of the motor caused by sudden start.

This method of starting the motor gradually is called the "SOFT START" function and is possible by the power supply which can change the voltage and frequency.

Patent No. 10-0656839 "Whirlpool bathtub type external motor protection device" proposed in order to improve the above problems is to install a control box configured separately from the whirlpool motor, and to install the control box from the motor idle and overload To protect. However, this device has no countermeasures for starting capacitors that cause the most frequent failures in whirlpool motors, and adopts a method in which a current transformer only detects the current flowing in the primary winding of the motor, and rectifies and rectifies it with a rectifying capacitor. However, this causes a significant time delay in the inflow of overcurrent, making it difficult to immediately take action. In other words, the current of the primary winding is to be monitored at high speed and in real time to protect the motor and capacitor by blocking the current when the overcurrent reaches the rated current.

In addition, it is indicated that it can detect leaks or floods, but it adopts a method of detecting leaks or floods by checking the current of the motor, which has a problem of having a separate leak detection sensor as a detection method that degrades accuracy. there was.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art, and does not use a starting capacitor that occupies the largest proportion of the causes of failure of the whirlpool motor, and prevents the motor from idling through the water level detection function. In case of sudden start-up by adopting the over-current blocking function of the motor and adopting the variable voltage, variable frequency type single phase inverter (VVVF) type power supply device that minimizes the inrush current generated by the motor starting momentarily and maximizes the starting torque. The object of the present invention is to provide a whirlpool bath control and safety device that can prevent the inrush current generated and protect the main winding and auxiliary winding of the motor.

Another object of the present invention is to protect the human life due to electric shock by the electric leakage blocking function of the electric part of the bathtub, to implement the semi-permanent life of the whirlpool motor by adopting the electronic contactless method, and to display the diagnostic information by fault through the indicator It provides a whirlpool bathtub control and safety device that informs the apartment management office and the corresponding manufacturer through the home network server of the exact cause of the failure so that the quickest action is possible.

The present invention for achieving the above object is a whirlpool tub, a current sensor for sensing the current input from the AC power source; An immersion sensor for detecting leaks or immersions; A water level sensor for detecting a water level in the bathtub; A temperature sensor for sensing an ambient temperature; A humidity sensor that detects ambient humidity; A display unit for displaying a current starting state; A communication unit for transmitting a current starting state; The motor start control unit for driving a whirlpool motor and a control device including a micom for controlling the operation of each circuit unit is characterized in that it is provided.

In addition, the motor starting control unit is characterized by consisting of a rectifying unit for receiving the AC power and rectifying it, and an inverter unit for selectively supplying the voltage supplied from the rectifying unit to the whirlpool motor 20 according to a gate control signal.

In addition, the immersion sensor is characterized by consisting of a capacitance switch for changing the capacitance value according to whether the contact of water, and a frequency generator for generating an output frequency that changes according to the contact of the water.

In addition, in addition to the communication unit in the control unit is configured to further include a home network server to inform the communication of the whirlpool start restrictions according to the motor abnormalities or the surrounding environment and the status of the whirlpool installed in the closed environment through communication from the outside It is characterized by.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram of a whirlpool bathtub control and safety device according to the present invention, as shown in the control device for collecting the detected data from each sensor inside to control the operation of the whirlpool motor 20 ( 10); In connection with the communication unit in the control device 10 includes a home network server 30 so as to know the information according to the whirlpool start restriction according to the motor abnormality or the surrounding environment and the state of the whirlpool installed in the closed environment through communication from the outside It is configured by.

Figure 3 shows a detailed block diagram of the whirlpool bathtub control and safety device according to the present invention, the control device 10 includes a current sensor 101 for sensing the current input from the AC power (AC 220V); An immersion sensor 102 for detecting leaks or immersion; A water level sensor 103 for detecting a water level in the bathtub; A temperature sensor 104 for sensing an ambient temperature; A humidity sensor 105 for sensing the ambient humidity; A display unit 106 for displaying a current starting state; A communication unit 107 for transmitting a current starting state; It comprises a motor starting control unit 108 for driving a whirlpool motor and a microcomputer 109 for collectively controlling the operation of each circuit unit.

FIG. 4 is a circuit diagram illustrating an exemplary embodiment of the motor starting control unit 108 of FIG. 3. The rectifying unit 108a receives and rectifies AC 220V, and the rectifying unit 108a according to a gate control signal. The inverter unit 108b selectively provides the voltage supplied from the whirlpool motor 20.

5A and 5B show a circuit diagram of an embodiment of the submersion sensor of FIG. 3, wherein the capacitance switch 102a changes in capacitance value according to whether water W is contacted, and the water W It consists of a frequency generator (102b) for generating an output frequency that changes depending on whether or not.

Referring to the operation of the whirlpool bathtub control and safety device according to the present invention configured as described above are as follows.

First, as shown in FIG. 3, the current sensor 101 detects a current input from an AC power source (AC 220V), and the immersion sensor 102 detects a leak or immersion.

In addition, the water level sensor 103 detects the water level in the bathtub, the temperature sensor 104 and the humidity sensor 105 detects the ambient temperature and humidity.

In addition, the display unit 106 displays the current starting state, and the communication unit 107 communicates the current starting state with the home network server 30 so as to provide information on the whirlpool start limit according to the motor abnormality or the surrounding environment and the closed environment. The status of the whirlpool installed on the outside will be notified.

In addition, the motor starting control unit 108 controls the driving of the whirlpool motor 20.

The whirlpool motor 20 is provided with a main winding (M1) and an auxiliary winding (M2) as shown in Figure 2 to the auxiliary winding (M2) for generating a rotating magnetic field for starting the motor starting controller 108 The whirlpool motor 20 is started by controlling.

At this time, the inrush current is minimized through the soft start function according to the control operation of the microcomputer 109, and the type of motor starting is determined based on the data collected from the various sensors 101 to 107.

As shown in FIG. 4, a motor starting control unit 108 including an inverter unit 108b that selectively provides a voltage supplied from the rectifying unit 108a to the whirlpool motor 20 is used to start the whirlpool motor 20. The existing starting capacitor C1 is removed, and the control power having a phase difference of 90 ° is applied to the auxiliary winding M2 for safer and smoother control.

That is, starting from 1/2 of the frequency of the power applied to the main winding M1, the power is applied to the auxiliary winding M2 (90 ° phase difference power is applied) to start the whirlpool motor 20.

The soft start function limits the current sensed through the current sensor 101 and applied to the whirlpool motor 20 using the frequency control method.

At this time, the drive of the whirlpool motor 20 is gradually stopped during the overcurrent through the data of the current sensor 101, and the operation is similarly performed when the submerged sensor 102 detects the submerged state.

That is, since the power itself is cut off from the control device 10, the electric accident does not occur even if the whirlpool motor 20 is submerged in water.

Even if there is a possibility that a safety accident due to AC power (AC220V) due to the high humidity stops the operation of the whirlpool motor 20, to cause a warning to the user.

As shown in FIGS. 5A and 5B, the capacitance switch 102a changes in capacitance value according to contact of water W, and generates an output frequency that varies according to contact of water W. The immersion sensor 102 composed of the frequency generator 102b includes a capacitive switch 102a, and as shown in FIG. 5B, when the surrounding capacitance decreases due to the contact of the water W, it is determined that the immersion and leakage causes a warning. At the same time, the whirlpool motor 20 is stopped.

As shown in FIG. 5A, in the state in which water W is not in contact with the capacitive switch 102a, only the capacitance value exists in CO, and as shown in FIG. 5B, the water W in the capacitive switch 102a is illustrated. ) Is in contact with the capacitance value due to CO + water (W) is present.

Whirlpool motor 20 transmits the information according to the whirlpool start restriction according to the surrounding environment to the home network server 30 through the display unit 106 and the communication unit 107 in the control device 10, closed tub Whirlpool motor 20 mounted on the or informs the status of the inside of the bathtub.

That is, since the state of the whirlpool installed in the closed environment is externally known through the display unit 106 or the home network server 30 connected to the communication unit 107 in the control device 10, Prompt action can be taken.

As described above, the whirlpool bath control and safety device according to the present invention is based on the data of various sensors and controls the operation of a single-phase whirlpool motor and limits the inrush current and protects the motor according to the overcurrent. By not using a capacitor, the lifespan of the whirlpool motor can be extended, and the AC insulation accidents caused by the whirlpool motor can be prevented from being submerged, and the automatic recognition of all possible problems may occur. It not only prevents safety accidents but also provides the effect of prompt action.

Claims (4)

In the whirlpool bathtub, A current sensor 101 for sensing a current input from an AC power source (AC 220V); An immersion sensor 102 for detecting leaks or immersion; A water level sensor 103 for detecting a water level in the bathtub; A temperature sensor 104 for sensing an ambient temperature; A humidity sensor 105 for sensing the ambient humidity; A display unit 106 for displaying a current starting state; A communication unit 107 for transmitting a current starting state; Whirlpool bathtub control and safety device comprising a control device 10 comprising a motor start control unit 108 for driving a whirlpool motor and a microcomputer (109) for controlling the operation of each circuit unit collectively. The method of claim 1, The motor starting controller 108 selectively provides the rectifier 108a for receiving and rectifying AC power 220 V and the whirlpool motor 20 with the voltage supplied from the rectifier 108a according to a gate control signal. Whirlpool bathtub control and safety device, characterized in that consisting of an inverter (108b). The method of claim 1, The immersion sensor 102 is a frequency generator for generating a capacitance switch 102a, the capacitance value of which changes depending on whether the water (W) and the output frequency that changes depending on whether the water (W) ( Whirlpool bathtub control and safety device, characterized in that consisting of (102b). The method of claim 1, In addition to the communication unit in the control unit 10, the home network server 30 to inform the outside of the whirlpool start restrictions according to the motor abnormality or the surrounding environment and the state of the whirlpool installed in the closed environment through communication from the outside Whirlpool bathtub control and safety device comprising a.

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