JP2000333867A - Power source circuit for jet bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the output of a bubble generation signal when there is a contact defect of an input switch. SOLUTION: A remote control switch input circuit 31 which outputs a signal to connect or open, a relay 3R to pass the current to be supplied to a DC pump 5 for driving bubble jets or to open the same according to the bubble generation signal or bubble stop signal from a remote control switch 7 is so constituted as to output the signal to connect or open the relay 3R when the connecting and opening of the contact of the input switch 3Z or a series of the operations of the opening and connecting area carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply circuit for a jet bath for supplying a driving current to a DC pump for pumping pressurized bath water together with air into a bathtub.

[0002]

2. Description of the Related Art In recent years, a bubble jet generating mechanism for circulating water in a bathtub, forcing the bathwater into the bathtub together with air, and for feeding a jet stream containing air bubbles into the bathtub has been widely used. ing. This is achieved by accelerating the circulating water using a drive pump (hereinafter referred to as a DC pump) 5 installed in a circulating water path 12 of a bathtub 11 and driven by a DC motor, as shown in FIG. The air sent from 13 is mixed with the accelerated bath water and injected into the bathtub 11 as a bubble jet from the injection port of the jet valve 14. By hitting this bubble jet on a predetermined part of the body,
It is said that an appropriate acupressure interval can be obtained and a feeling of fatigue can be reduced.

FIG. 4 is a schematic block diagram showing an example of a configuration of a jet bath power supply circuit 10A which is a drive circuit of the DC pump 5. The jet bath power supply circuit 10A
A power supply switch 1 connected to an AC power supply line via an earth leakage breaker 6, a switching power supply 2 for outputting a predetermined DC voltage, and a current supplied to the DC pump 5 according to ON / OFF of a bubble jet generating switch 3S. And a control circuit 3 having a relay 3R for supplying or shutting off. The earth leakage breaker 6 includes a detection unit 61 that outputs an earth leakage signal by detecting earth leakage of an AC power supply line, a test unit 62 that is activated by an earth leakage check switch 64 and outputs a test signal, And a power cutoff unit 63 that cuts off the AC power supply line by inputting a signal, and cuts off the AC power supply line at the time of leakage of the AC power supply line or at the time of a leakage test.

Next, the jet bath power supply circuit 10A
Will be described. When the bubble generation switch 3S is turned on while the power switch 1 is turned on, the contact of the relay 3R of the control circuit 3 is connected, and the switching power supply 2
, A predetermined drive voltage is applied to the DC pump 5, and the DC pump 5 is driven to pressurize the bath water in the circulating water path 12. The pressurized bath water is supplied to the air introduction pipe 13 in the jet valve 14.
From the jet valve 14 and jetted into the bathtub 11 as a jet stream (bubble jet) accompanied by bubbles (bubbles). Further, when the bubble generation switch 3S is turned off, the contact of the relay 3R of the control circuit 3 is opened, the current supply to the DC pump 5 is stopped, and the jet flow is stopped. Further, regardless of whether the DC pump 5 is operating or not, the earth leakage breaker 6 immediately shuts off the AC power line when the earth leakage of the AC power line is detected, and a device (hereafter) of the earth leakage breaker 6 is provided. Then, the connection between the input line of the jet bath power supply circuit 10) and the AC power supply line is cut off.

[0005]

However, the earth leakage breaker 6 has only a function of interrupting the supply of AC power to the jet bus power supply circuit 10A only when the earth leakage of the AC power supply line occurs. Therefore, a means for detecting an abnormality of the jet bath power supply circuit 10A such as an overturn of the apparatus, an abnormality of the bath water temperature, or an abnormal current of the DC motor, and a safety device for disconnecting the connection with the AC power supply line are provided. There has been proposed a method of interrupting connection to an AC power supply line when an abnormality is detected (Japanese Patent Laid-Open No. 5-212222). Although the abnormal current of the DC motor is not described in detail in the above publication, it is considered that the abnormal current indicates a current value equal to or higher than a standard value due to an increase in load due to entry of foreign matter into the circulation path or the like. Can be However, in the above conventional example, the bubble generation signal is continuously output due to a contact failure of the input switch for inputting the bubble generation signal or the stop signal, and the current is continuously supplied to the DC motor. Since no countermeasures have been taken against the failure that causes the abnormality, the jet bus power supply circuit 10A continues to operate until some abnormality occurs even if the above failure occurs. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems, and has as its object to provide a jet bus power supply circuit that does not output a bubble generation signal when there is a contact failure of an input switch. And

[0007]

According to a first aspect of the present invention, there is provided a jet bus power supply circuit which performs a series of operations of connecting and opening or opening and connecting a contact of an input switch.
A water tank is provided with a switch unit configured to connect or open a relay for supplying a current supplied to a DC pump that drives a bubble jet that conveys bath water together with air.

According to a second aspect of the present invention, a power supply circuit for a jet bath is provided with a timer for setting a maximum value of an energizing time of a current supplied to a DC pump, and the timer is set and reset by the switch. Things.

According to a third aspect of the present invention, a jet bus power supply circuit sets or resets a flip-flop by a series of operations of connecting and opening or opening and connecting the contacts of the input switch, and the above-mentioned set signal or reset signal sets the flip-flop. The timer is set or reset.

According to a fourth aspect of the present invention, in the jet bath power supply circuit, the switching power supply is a two-output power supply that outputs two different voltages, and a pump strength switching circuit is provided to reduce the ejection pressure of the bubble jet. It can be switched.

The power supply circuit for a jet bath according to the present invention is provided with means for detecting the water level of the bathtub and means for detecting the rotation of the DC pump. A pump idling prevention circuit for stopping the current supply to the motor is provided.

According to a sixth aspect of the present invention, there is provided a power supply circuit for a jet bath, wherein pump current detecting means for detecting a current flowing through the DC pump is provided, and rotation of the DC pump is detected by the pump current detecting means. Things.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a jet bus power supply circuit 10 according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an AC power supply line (household power supply; AC 100 V) via the following earth leakage breaker 6. A power switch 2 connected to the power supply, a switching power supply for converting an input AC voltage into a predetermined DC voltage and outputting the DC voltage;
3 is a relay 3 for supplying or interrupting current to the DC pump 5
This is a control circuit provided with R. The earth leakage breaker 6 detects an earth leakage of the AC power supply line and outputs an earth leakage signal.
A power supply circuit for a jet bus, comprising: a test section 62 that outputs a test signal by being activated by a leakage check switch 64; and a power cutoff section 63 that cuts off the AC power line by inputting the leak signal or the test signal. 10
And the AC power supply line.

The switching power supply 2 is a well-known DC-DC
The converter type switching power supply rectifies the AC voltage input on the primary side 2A, generates a pulse of a predetermined chopping frequency (for example, 20 kHz) by the switching circuit 22, and converts the pulse to a predetermined voltage by the high frequency transformer 23. The voltage is stepped down, transferred to the secondary side 2B, converted into a desired DC voltage by the constant voltage control circuit 24, and output. The overcurrent protection circuit 25 is provided on the primary side 2A, acts on the switching circuit 22 when an abnormal current flows through the switching circuit 22, and stops the switching operation. Acts on the switching circuit 22 when an overvoltage occurs,
This is an overvoltage protection circuit that stops the switching operation.

The control circuit 3 includes a remote control switch input circuit 31 which is a switch for inputting a bubble generation signal or a bubble stop signal from the remote control switch 7, and a relay 3.
R, a pump output on / off circuit 32 for connecting or disconnecting the contact of the relay 3R based on a signal from the remote control switch input circuit 31 to supply or stop the current to the DC pump 5; When a predetermined time (for example, 15 minutes) has elapsed, a timer circuit 33 that outputs a signal for shutting off the contact of the relay 3R to the pump output on / off circuit 32, an output side of the switching power supply 2 and A pump current detection circuit 34 provided between the pump output on / off circuit 32 and detecting the value of the current supplied to the DC pump 5; and a pump current detection circuit 34 mounted inside a bathtub (not shown) or the DC pump 5 It is determined whether the DC pump 5 is idling based on the output of the water level sensor 8 or the detected current value from the pump current detection circuit 34,
When the DC pump 5 is idling, a pump idling prevention circuit 35 for controlling the pump output on / off circuit 32 to stop the DC pump and a jet flow intensity signal from the remote control switch 7 are used. A pump strength switching circuit 36 for outputting a voltage switching signal for switching a voltage value applied to the DC pump 5 to the constant voltage control circuit 24 of the switching power supply 2, in response to the bubble generation signal or the bubble stop signal. , Pump output on / off circuit 3
2 to open or close the relay 3R to supply or stop the current to the DC pump 5, and to operate the earth leakage breaker 6 to cut off the power supply circuit 10 and the AC power supply line when a failure such as a contact failure of the relay 3R occurs. .

The remote controller switch input circuit 31 sets or resets the flip-flop 3F for setting or resetting the timer circuit 33, and sets and resets the flip-flop 3F when a series of operations for connecting and opening contacts are performed. An input switch 3Z is provided to operate the timer circuit 33 in response to a bubble generation signal or a bubble stop signal from the remote control switch 7 to connect or open the relay 3R. A series of operations for connecting and disconnecting the contacts of the input switch 3Z can be easily performed by using known means such as an electromagnetic solenoid. The input switch 3Z can also be operated manually such that a contact is connected when a button (not shown) is pressed and released from the spring when released.

Next, the operation of the jet bus power supply circuit 10 having the above configuration will be described with reference to the time chart of FIG. At the time t with the power switch 1 turned on,
_{In 1} , when a bubble generation signal is input by the remote control switch 7, the remote control switch input circuit 31
As shown in FIG. 2A, after the input switch 3Z performs a series of operations of connecting (at time t ₁ ) and opening (at time t ₂ ) the contacts, as shown in FIG. 3F
Is set. This set signal, as shown in FIG. 2 (c), along with the timer circuit 33 timer is set to a period T _0, the connection instruction signal is sent to the pump output on and off circuit 32, FIG. 2 (d) As shown in FIG. 2, the relay 3R is connected, and as shown in FIG. 2 (f), a pump current flows, and the DC pump 5 is driven to pressurize bath water in a circulating water path (not shown).

[0018] Here, from the time t _2, the the set period T ₀ bubbles stop signal at time t ₃ when the elapse of a short period T ₁ than the timer is inputted, the connection and open the contacts of the input switch 3Z after a series of operations, the flip-flop 3F is reset at time t _4, the timer is reset. At this time, an opening command signal is sent from the timer circuit 33 to the pump output on / off circuit 32, the relay 3R is opened, the supply of the pump current is stopped, and the DC pump 5 is stopped. In addition, the bubble generation signal is input at time t _5,
At time t ₆ , the timer is set to period T ₀ , and if no bubble stop signal is input during the period of T ₀ , time t ₇ = t ₆ +
At T ₀ , the timer stops, and the timer circuit 33 sends a time-up signal (opening command signal) connection command signal to the pump output on / off circuit 32. As a result, the relay 3R is opened, the supply of the pump current is stopped, and the DC pump 5
Stops.

In the above-described normal operation, the pump idling prevention circuit 35 detects whether the water level in the bathtub is low by the water level sensor 8 or when the pump current detection circuit 34 detects a decrease in the pump current. , DC pump 5
Is determined to be idling, and the pump output on / off circuit 3
By sending a pump stop signal to the DC pump 2, the DC pump 5 is stopped to prevent the pump from running idle. When the jet flow strength switching signal is input to the strength switching circuit 35, the strength switching circuit 35 controls the constant voltage control circuit 24 of the switching power supply 2 to switch the voltage value applied to the DC pump 5. This switches the strength of the jet stream injected into the bathtub.

If the contacts of the input switch 3Z are always in contact with each other due to a failure of the return spring or the like, the operation of opening the contacts of the input switch 3Z is not performed. Also, no bubble stop signal is output, and the ON state of relay 3R is not continued. That is, in the conventional power supply circuit, the input switch 3
When the Z contact is always in contact, the supply of current to the DC motor 5 is not stopped, the DC motor continues to rotate, and the jet flow does not stop. 5 may cause a motor failure, whereas in the present embodiment, since a bubble generation signal is not output, unnecessary failure due to a rise in the temperature of the DC motor 5 or the like is prevented. Can be prevented.

[0021]

As described above, according to the first aspect of the present invention, when a series of operations of connecting and opening the contacts of the input switch, or performing a series of operations of opening and connecting, the bath water is supplied to the water tank. A switch is provided that connects or opens a relay to supply current to the DC pump that drives the bubble jet that is transported together with it. Bubbles are generated even when the contacts of the input switch are always in contact. The signal is not output continuously. Therefore, it is possible to prevent an unnecessary failure due to a rise in the temperature of the DC motor or the like.

According to the second aspect of the present invention, the timer for setting the maximum value of the energizing time of the current supplied to the DC pump is provided, and the timer is set and reset by the switch. The DC motor can be reliably turned on and off.

According to the third aspect of the present invention, the flip-flop is set or reset by a series of operations of connection and opening or opening and connection of the contacts of the input switch, and the timer is set by the set signal or the reset signal. Since the timer is set or reset, the timer can be reliably turned on / off and the DC motor can be reliably turned on / off.

According to the fourth aspect of the present invention, the switching power supply is a two-output power supply that outputs two different voltages and a pump strength switching circuit is provided.
Since the jet pressure of the bubble jet can be switched, the jet pressure of the bubble jet can be switched at an appropriate time, and an appropriate finger pressure can be obtained.

According to the fifth aspect of the present invention, a means for detecting the water level in the bathtub and a means for detecting the rotation of the DC pump are provided. Since the pump idling prevention circuit for stopping the current supply is provided, unnecessary pump rotation can be avoided.

According to the present invention, the pump current detecting means for detecting the current flowing through the DC pump is provided, and the rotation of the DC pump is detected by the pump current detecting means. The rotation of the DC pump can be detected with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a jet bus power supply circuit according to an embodiment of the present invention.

FIG. 2 is a time chart for explaining an operation of the jet bath power supply circuit according to the embodiment of the present invention.

FIG. 3 is a diagram showing an outline of a jet bath.

FIG. 4 is a diagram showing a configuration of a conventional jet bus power supply circuit.

[Explanation of symbols]

Reference Signs List 1 power switch, 2 switching power supply, 2A primary side of switching power supply, 2B secondary side of switching power supply, 3 control circuit, 3R relay, 5 DC pump, 6
Earth leakage breaker, 7 remote control switch, 8 water level sensor, 10 jet bath power supply circuit, 22 switching circuit, 23 high frequency transformer, 24 constant voltage control circuit,
25 overcurrent protection circuit, 26 overvoltage protection circuit, 31
Remote control switch input circuit, 32 pump output on / off circuit, 33 timer circuit, 34 pump current detection circuit, 35 pump idling prevention circuit, 36 pump strength switching circuit, 61 detection section, 62 test section, 63 power cutoff section, 64 earth leakage Check switch.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 2D005 FA00 3K058 AA12 AA16 BA00 CB02 3L024 CC18 DD17 DD27 EE02 HH13 4C074 LL07 MM04 QQ38 QQ40 5G044 AA01 AA03 AA11 AC01 AD03 AE01 CA01 CA05 CA09 CA14 CE05

Claims (6)

[Claims] 1. A switching power supply for outputting a predetermined DC voltage, and a control circuit for turning on / off a current supplied to a DC pump for driving a bubble jet for carrying bath water with air into a water tank by a relay. A jet bus power supply circuit, further comprising a switch unit for connecting or opening the relay when a series of operations of connection and opening or opening and connection of contacts of an input switch are performed. Power circuit. 2. The jet according to claim 1, further comprising a timer for setting a maximum value of a current supply time of a current supplied to the DC pump, and setting and resetting the timer by the switch. Power supply circuit for bus. 3. The method according to claim 1, wherein the flip-flop is set or reset by a series of operations of connection and opening or opening and connection of the contacts of the input switch, and the timer is set or reset by the set signal or the reset signal. The jet bath power supply circuit according to claim 2, wherein: 4. The switching power supply according to claim 2, wherein the switching power supplies are different from each other.
2. The jet bath power supply circuit according to claim 1, wherein a two-output power supply for outputting two voltages and a pump strength switching circuit are provided so that the ejection pressure of the bubble jet can be switched. 5. A pump idling prevention circuit for providing a means for detecting a water level in a bathtub and a means for detecting rotation of a DC pump, and for stopping current supply to the DC pump when the DC pump is idling. The power supply circuit for a jet bath according to claim 1, further comprising: 6. A jet according to claim 5, further comprising pump current detecting means for detecting a current flowing through said DC pump, and detecting rotation of said DC pump by said pump current detecting means. Power supply circuit for bus.