JPH08126068A - 2-wire hot water system - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a two-wire hot water system having an intercom function and a radio broadcast receiving function. A radio receiving means 10 for extracting a frequency obtained by down-converting a high frequency signal received via an antenna 10a as an intermediate frequency signal IF and superimposing it on a two-wire type signal line is provided in the two-wire type signal lines 2a, 2b. The water heater control devices 31 and 41 connected to the kitchen and bathroom have speaker units 31c and 41c for listening to radio broadcasts and handset 31b and 41b for intercom communication in the detectors 31 and 41 for detecting the intermediate frequency signal IF. A switch for sending a remote control signal for controlling on / off of the power switch of the water heater, a second switch for selectively connecting the intercom communication means, and a third switch for selectively connecting the radio receiving means. And push button switch means 31a and 41a including.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-wire hot water supply system used in general households and offices, and more particularly to a two-wire hot water supply system having an intercom function and a radio receiving function.

[0002]

2. Description of the Related Art Conventionally, a two-wire hot water supply system used in general households and offices has a water heater connected to an AC power line (AC100V) such as a home electric power line and installed in a water heater and a kitchen. A remote control signal is sent from the water heater control device via a two-wire type signal line provided between the water heater control devices, and the power switch of the water heater is turned on / off to start the water heating or the water heating. It is configured so that it can be stopped and hot water can be supplied to the kitchen, bathroom, and the like. FIG. 2 shows a conventional 2-wire hot water supply system using this kind of 2-wire signal line. 1 is a water heater, 11 is a hot water storage tank, 12 is a water heating burner, and 13 is a power line (AC100V) for igniting the water heating burner 12.
A power switch connected to the power switch 14, a control circuit (microcomputer) 14 for controlling on / off of the power switch 13,
Reference numeral 15 is a remote control signal receiving circuit, 2a and 2b are 2-wire type signal lines, 3 is a kitchen water heater control device including a multi-frequency signal oscillator (MF signal oscillator) installed in the kitchen A, 3
a is a push button switch provided in the kitchen water heater controller 3, 4 is a bathroom water heater controller including a multi-frequency signal oscillator (MF signal oscillator) installed in the bathroom B, 4
a is a push button switch provided in the bathroom water heater control device 4, 5 is a hot water supply pipe, 6 is a kitchen water tank of the kitchen A, and 7
Is a bathtub in bathroom B, 8 is a faucet provided in kitchen A, 9
Is a faucet provided in bathroom B.

In the conventional 2-wire hot water supply system using the 2-wire signal line shown in FIG. 2, the ignition operation of the water heating burner 12 of the water heater 1 from the kitchen A or the bathroom B will be described. For example, by operating the push button switch 3a provided in the kitchen water heater control device 3 installed in the kitchen A, a predetermined multi-frequency signal which is a remote control signal from the multi-frequency signal transmitter (MF signal oscillator) is operated. When (MF signal) fa is transmitted, the MF signal is 2
It is input to the remote control signal receiving circuit 15 of the water heater 1 via the linear signal lines 2a and 2b. Upon detecting the MF signal fa, the remote control signal receiving circuit 15 sends a detection output to the control circuit 14. Therefore, the control circuit 14 controls the power switch 13 to be turned on, and the operation of the power switch 13 ignites the boiling water burner 12. Thereby, the hot water heated to a high temperature is stored in the hot water storage tank 11. When the faucet 8 provided in the kitchen A or the faucet 9 provided in the bathroom B is opened, hot water is discharged through the hot water supply pipe 5 and flows into the kitchen water tank 6 of the kitchen A and the bathtub 7 of the bathroom B, respectively. It is configured.

On the other hand, when the push button switch 3a provided in the kitchen water heater control device 3 installed in the kitchen A is operated to send out a predetermined multi-frequency signal (MF signal) fb which is a remote control signal. The MF signal is input to the remote control signal receiving circuit 15 of the water heater 1 via the two-wire type signal lines 2a and 2b. Remote control signal receiving circuit 1
The control circuit 1 outputs a detection output when detecting the MF signal fb.
4 Therefore, the control circuit 14 is configured to turn off the power switch 13, turn off the power switch 13, and extinguish the boiling water burner 12. In addition, the faucet 8 provided in the kitchen A when the fire is extinguished
Alternatively, when the faucet 9 provided in the bathroom B is opened, cold water is discharged through the hot water supply pipe 5 and flows into the kitchen aquarium 6 of the kitchen A and the bath tub 7 of the bathroom B, respectively.

[0005]

However, in such a conventional two-wire hot water supply system using two wire signal lines, the hot water heater 1 simply sends a remote control signal from the hot water heater control devices 3 and 4. The power switch 13 is controlled to be turned on / off to start boiling water, or to stop boiling water, so that hot water can be supplied to the kitchen A or the bathroom B. Signal line 2
It does not have a communication function while wiring a and 2b. For example, when the wife in the kitchen A wants to talk or contact the husband who is taking a bath in the bathroom B, the wife must go to the bathroom B to talk and contact each other. In such a case, it is extremely convenient to have an intercom function or the like that allows mutual communication between kitchen A and bathroom B. Further, it would be more convenient if radio waves such as AM and FM can be listened to in kitchen A or bathroom B at the same time. In particular, if you can enjoy night game broadcasts and music while taking a bath, you will be refreshed and you can expect further effects to recover from physical and mental fatigue. That is, the two using the conventional two-wire type signal line
The wire-type hot water supply system does not have a communication function or a radio reception function, and if these functions are to be provided,
There was a drawback that a completely new capital investment was required, such as wiring work and installation of communication equipment. The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and the purpose thereof is to eliminate the need for new facility investment such as performing another wiring work, and between the kitchen 5 and the bathroom 6. An object of the present invention is to provide an inexpensive two-wire hot water supply system using an inexpensive two-wire signal line, which has an intercom function capable of mutual call and a radio receiving function capable of listening to radio broadcasting such as AM and FM.

[0006]

In order to achieve this object, a first invention of the present invention is a two-wire system arranged between a water heater and a water heater controller provided in a kitchen, a bathroom or the like. A remote control signal is sent from the water heater controller to the water heater via a signal line, and a power switch is turned on / off by receiving output from a remote controller signal receiving means of the water heater to start or stop water heating. A two-wire hot water supply system configured to enable hot water to be supplied from the water heater to the kitchen, bathroom, etc., wherein a high-frequency signal received via an antenna is supplied to the two-wire signal line. A radio receiving means for extracting the down-converted frequency as an intermediate frequency signal IF and superimposing it on the two-wire type signal line is connected, and the water heater control device has a detecting means for detecting the intermediate frequency signal IF. Listen And a speaker unit for making an intercom call, a first switch for sending a remote control signal for on / off control of a power switch of the water heater, a second switch for selectively connecting an intercom call means, and a radio The present invention is characterized in that a push button switch means including a third switch for selectively connecting the radio receiving means to listen to a broadcast is provided, and the second invention is the push button switch means. Further, it is characterized in that a fourth switch for selectively connecting the handset communication means is provided.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing a two-wire hot water supply system using a two-wire signal line showing an embodiment of the present invention.
In FIG. 1, the same symbols as those in FIG. 2 indicate the same things. 10 is a radio receiver (tuner unit), 10a is an antenna, 31 is a kitchen water heater control device including a multi-frequency signal transmitter (MF signal oscillator) installed on the wall of the kitchen A, etc.
Reference numeral 31a is a push button switch provided in the kitchen water heater control device 31, 31b is a waterproof type handset for handset conversation, 31c is a speaker unit for listening to radio broadcast and intercom conversation, 41 is bathroom B Bathroom water heater control device including a multi-frequency signal transmitter (MF signal oscillator) installed on the wall surface of the bathroom, 41a is a push button switch provided in the bathroom water heater control device 41, and 41b is for making a handset call. A waterproof type handset 41c is a speaker unit for listening to a radio broadcast and for making an intercom call.

In such a two-wire hot water supply system using the two-wire signal line of the present invention shown in FIG.
Or, the ignition operation of the water heating burner 12 of the water heater 1 from the bathroom B will be described. For example, by operating the key KA of the push button switch 31a provided in the kitchen water heater control device 31 installed in the kitchen A, a predetermined remote control signal from the multi-frequency signal oscillator (MF signal oscillator) is set. When a multi-frequency signal (MF signal) fa is sent,
The MF signal is input to the remote control signal receiving circuit 15 of the water heater 1 via the two-wire type signal lines 2a and 2b. Upon detecting the MF signal fa, the remote control signal receiving circuit 15 sends a detection output to the control circuit 14. Therefore, the control circuit 14 controls the power switch 13 to be turned on, and the operation of the power switch 13 ignites the boiling water burner 12. Thereby, the hot water heated to a high temperature is stored in the hot water storage tank 11. When the faucet 8 provided in the kitchen A or the faucet 9 provided in the bathroom B is opened, hot water is discharged through the hot water supply pipe 5 and flows into the kitchen water tank 6 of the kitchen A and the bathtub 7 of the bathroom B, respectively. It is configured.

On the other hand, by operating the key KB of the push button switch 31a provided in the kitchen water heater control device 31 installed in the kitchen A, a predetermined multi-frequency signal (MF signal) fb which is a remote control signal is operated. Is sent, the MF
The signal is supplied via the two-wire type signal lines 2a and 2b to the water heater 1.
Is input to the remote control signal receiving circuit 15. When detecting the MF signal fb, the remote control signal receiving circuit 15 sends a detection output to the control circuit 14. Therefore, the control circuit 14
The power switch 13 is turned off, the power switch 13 is turned off, and the water heating burner 12 is extinguished. When the faucet 8 provided in the kitchen A or the faucet 9 provided in the bathroom B is opened when the fire is extinguished, cold water is discharged through the hot water supply pipes 5 and the kitchen aquarium 6 of the kitchen A and the bathroom, respectively. It is configured to flow into the bathtub 7 of B.

Next, a call operation for making a call between the kitchen A and the bathroom B via the two-wire type signal lines 2a and 2b will be described. The two-wire type signal lines 2a, 2b
Uses non-polarized 75Ω balanced two-wire. For example, kitchen A
When calling bathroom B from and making a handset call,
The waterproof type handset 31b provided in the kitchen water heater control device 31 installed in the kitchen A is lifted and the key KC of the push button switch 31a is operated to determine a predetermined multi-frequency signal (MF) which is a calling signal. Signal) fc, the MF signal is detected by the ringing signal receiving circuit in the bathroom water heater control device 41 provided in the bathroom via the two-wire type signal lines 2a, 2b, and the detection output outputs the radio signal. A ringtone is sent from the speaker unit 31c for listening to the broadcast and for making an intercom call. In bathroom B,
By raising the waterproof type handset 41b in the bathroom water heater control device 41, handsets can be talked between the kitchen A and the bathroom B. When the call ends and the waterproof type handset 31b or 41b is put on the hook switch, the call circuit is disconnected.

When the bathroom B is called from the kitchen A and an intercom call is made, the speaker units 31c and 4 are connected.
1c and. When the key KD of the push button switch 31a provided in the kitchen water heater control device 31 is operated, the speaker unit 31c having the intercom call function is turned on and the two-wire type signal lines 2a, 2
An interphone call loop is formed with the speaker unit 41c via b. Then, the audio signal from the operator of the kitchen A is superimposed on the two-wire type signal lines 2a and 2b as the intermediate frequency signal IF from the oscillation circuit provided in the speaker unit 31c. Speaker unit 4 in bathroom B
In 1c, the intermediate frequency signal IF is detected by the detection circuit provided in the speaker unit 41c, an audio signal is taken out, and output from the speaker. That is, key K
While D is pressed, the voice from the operator in kitchen A is played from the speaker in bathroom B. When the key KD is released, the speaker unit 31c is powered off and the audio output is stopped.

On the other hand, as for the voice from the operator of the bathroom B, when the key KE of the push button switch 41a provided in the bathroom water heater control device 41 is operated, the power of the speaker unit 41c having the intercom call function is turned on. The speaker unit 31 is connected via the two-wire type signal lines 2a and 2b.
An intercom call loop is formed with c. Then, the voice signal from the operator in the bathroom B is the speaker unit 41.
The intermediate frequency signal IF is superposed on the two-wire type signal lines 2a and 2b from the oscillation circuit provided in c. Kitchen A
In the speaker unit 31c of
This intermediate frequency signal I is detected by the detection circuit provided in c.
F is detected, an audio signal is taken out, and output from the speaker. That is, while the key KE is pressed, the voice from the operator in the bathroom B is played from the speaker in the kitchen A. When the key KE is released, the speaker unit 41c is powered off and the audio output is stopped. In this way, an intercom call is made between the two parties.

Next, the function of receiving a radio broadcast will be described. The high frequency signal received via the antenna 10 is superposed and mixed with the high frequency generated by the transmission circuit of the radio receiver 9, and the difference, that is, the down-converted frequency is taken out as the intermediate frequency signal IF, and the two-wire type signal is obtained. It is superimposed on the lines 2a and 2b. In the kitchen A, the speaker unit 3 provided in the kitchen water heater control device 31
When the intermediate frequency signal IF is detected by the detection circuit 1c to extract an audio signal and the key KF of the push button switch 31a is operated, a radio broadcast flows from the speaker of the speaker unit 31c. In the bathroom B as well, when the intermediate frequency signal IF is detected by the detection circuit of the speaker unit 41c provided in the bathroom water heater control device 41 and a voice signal is taken out and the key KG of the push button switch 41a is operated, the speaker unit 41c You can listen to the radio broadcast from the speaker. The switching of these channels is configured such that when the keys KF or KG are sequentially pressed and released, the channels change one after another, and a desired channel can be selected. Thus, for example, in the bathroom, when you want to talk slowly in a bathtub, the waterproof type handset 3
Handset call using 1b is possible, and in the case of simple contact call, intercom call can be selected. You can also enjoy your favorite radio broadcast slowly.

[0014]

As is apparent from the above description, the present invention eliminates the drawbacks of the prior art, and eliminates the need for new facility investment such as carrying out another wiring work. It is possible to provide an inexpensive two-wire hot water supply system using a two-wire signal line, which has a handset call function and an intercom function for making a call and a radio receiving function for listening to a radio broadcast such as AM and FM. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is a block diagram of a two-wire hot water supply system showing an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional two-wire hot water supply system.

[Explanation of symbols]

 1 Hot Water Heater 2a, 2b 2-Wire Signal Line 3, 31 Kitchen Water Heater Control Device 3a, 4a, 31a, 41a Push Button Switch 4, 41 Bathroom Water Heater Control Device 5 Hot Water Pipe 6 Kitchen Water Tank 7 Bathtub 8, 9 Faucet 10 Radio Receiver (Tuner Unit) 10a Antenna 11 Hot Water Storage Tank 12 Water Heater Burner 13 Power Switch 14 Control Circuit (Microcomputer) 15 Remote Control Signal Reception Circuit 31b, 41b Waterproof Handset 31c, 41c Speaker Unit

Claims (2)

[Claims] 1. A remote control signal is sent from the water heater controller to the water heater via a two-wire type signal line provided between the water heater and the water heater controller provided in the kitchen or bathroom. A structure for enabling hot water supply from the water heater to the kitchen, bathroom, etc. by starting / stopping the water heating by controlling the on / off of the power switch by the reception output from the remote control signal receiving means of the water heater In the two-wire hot water supply system, a frequency obtained by down-converting a high frequency signal received via an antenna is taken out as an intermediate frequency signal IF into the two-wire signal line and superposed on the two-wire signal line. A radio receiving unit connected to the water heater control unit, the water heater controller having a detecting unit for the intermediate frequency signal IF, a speaker unit for listening to a radio broadcast and performing an intercom call, and the water heater. A first switch for transmitting a remote control signal for controlling on / off of the power switch of the device, a second switch for selectively connecting the intercom communication means, and a selective connection for the radio receiving means for listening to a radio broadcast A two-wire hot water supply system comprising: a push button switch means including a third switch of the above. 2. The two-wire hot water supply system according to claim 1, wherein the push button switch means is further provided with a fourth switch for selectively connecting the handset talking means.