JPH02171514A - Hot water feed system - Google Patents

Abstract

PURPOSE:To prevent the damage of a piping system and the generation of noise through prevention of the occurrence of water hammer phenomenon during the feed of hot water by a method wherein a cut-off valve is formed with a solenoid valve, and a cut-off control means is formed such that the cut-off valve is closed after throttling of a flow rate by means of a flow rate control part. CONSTITUTION:Since cut-off valves 43a-43c to control the feed of hot water from hot water feed ports 4a-4c, respectively, are formed with a solenoid valve, various control of the feed of hot water can be easily effected. Control of cut-off is made so that the cut-off valves 43a-43c are closed after a flow rate is throttled by a flow rate control part 42. Thus, the damage of a piping system and the generation of noise can be prevented through prevention of the occurrence of water hammer phenomenon during the stop of the feed of hot water. Since the solenoid valve with which the cut-off valves 43a-43c are formed is formed such that, with the exciting current of the solenoid cut off, it is closed, the feed of hot water is automatically stopped during outage, and safety is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot water supply system in which hot water can be appropriately dispensed from a water heater to a hot water supply opening via a flow rate control unit and a water stop valve.

[Prior Art] Conventionally, this type of hot water system, which allows hot water to be appropriately dispensed from a water heater to a hot water inlet via a flow rate control unit and a water stop valve, has been designed to supply hot water to a water heater and an appropriate amount of hot water from the water heater. A hot water mixing means mixes hot water to form hot water at a predetermined temperature, and the hot water formed by the hot water mixing means is appropriately supplied to a bathtub hot water inlet, washing area hot water inlet, shower hot water inlet, etc. via a flow rate control unit and a water stop valve. It consists of a hot water tap switching means for dispensing hot water, and a water shutoff valve to electrically control hot water dispensing. Some were made of magnetic valves and were designed to perform various types of hot water supply control.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, when hot water is stopped by a water stop valve made of an electromagnetic valve, a water hammer phenomenon occurs due to the flow path being suddenly closed. However, there were problems in that the piping system could be damaged or noise could be generated.

The present invention has been made in view of the above points, and its purpose is to provide a hot water supply system that can prevent the occurrence of the water hammer phenomenon when hot water is stopped, thereby preventing damage to the piping system and generation of noise. It is about providing.

[Means for Solving the Problems] The hot water supply system of the present invention mixes an appropriate amount of water with hot water from a water heater to form hot water at a predetermined temperature, and connects the water to the hot water supply port via a flow rate control unit and a water stop valve. In the hot water supply system, the water stop valve is formed by an electromagnetic valve, and a water stop control means is formed so that the water stop valve is closed after the flow rate is throttled by a flow rate control section. .

[Function] The present invention is configured as described above, and mixes an appropriate amount of water with hot water from a water heater to form hot water at a predetermined temperature, and then controls the hot water supply port through a flow rate control unit and a water stop valve. In the hot water supply system, the water stop valve is formed by an electromagnetic valve, and a water stop control means is formed so that the water stop valve is closed after the flow rate is throttled by a flow rate control section. ,
Various types of hot water supply control can be easily performed electrically, and the water hammer phenomenon can be prevented from occurring when the hot water supply is stopped, thereby preventing damage to the piping system and generation of noise.

[Embodiment] Figure 1 shows an example of the arrangement of a multi-point hot water supply system using an operation display device according to the present invention, and Figure 2 shows a schematic configuration of the same as above. hot water mixing means 2 for mixing an appropriate amount of water to form hot water at a predetermined temperature;
, 4c, and a hot water supply switching means 3 for appropriately discharging hot water from each hot water supply port 4a, 4b.
.

Hot water supply control unit 5a corresponds to 4c.

5b and 5c are provided, and hot water supply control units 5a and 5ty are provided.

Hot water supply control and hot water temperature setting are performed using the 5C hot water supply control switch, water temperature setting switch, and other scraping switches, and the set water temperature is displayed on the display, and each hot water supply port 4a, 4b, When hot water is supplied from 4c, the hot water supply port 4. a,
A control means is provided for controlling the hot water mixing means 2 so that the hot water temperature reaches the temperature set in the hot water supply control units 5a, 5b, and 5c provided corresponding to the hot water supply control units 4b and 4c.

Here, the hot water mixing means 2 includes a hot water mixing section 40 that mixes hot water from the water heater 1 and city water, and a hot water temperature control gear unit 40a that rotationally drives a mixing ratio setting mechanism of the hot water mixing section 40 using a stepping motor. and a temperature sensor 41 that detects the temperature of the mixed hot water. Further, the hot water output switching means 3 includes a flow rate control unit 42 that controls the hot water output flow rate, a flow I control gear unit 42a that drives a flow rate setting mechanism with a DC motor, and water stop valves 43a and 43 that are composed of electromagnetic valves.
b.

43c, and a flow rate sensor 44 provided on the hot water supply port side of the water stop valve 43a. The hot water mixing means 2, the hot water supply switching means 3, and the control circuit block 7a that controls both means 2.3 are integrated as a drive unit 7, as shown in FIGS. In Fig. 1, numeral 45 indicates a flow rate sensor that detects the state of drainage, and numeral 46 indicates a water level sensor that detects the water level in the bathtub using water pressure. Va to Vc are control circuit block 7
Opening/closing control signals, V S + to Vs, which are output from each sensor 41.
The sensor output signals output from 44, 45, and 46 and input to the control circuit block 7a, Vd, Vd2 are drive signals that drive the motors of each gear unit 40a, 42a, and VP+, VPz are the operation of gear units 40a, 42a. This is a position signal indicating the state (setting state R).

On the other hand, the control means for controlling the hot water mixing means 2 and the hot water output switching means 3 is composed of a main control unit 6 that sets various initial states, and a control circuit block 7a integrated with the drive unit 7. Each hot water supply control unit 5a, 5b.

Data transmission between the main control unit 5c, the main control unit 6, and the control circuit block 7a is performed via a signal line 8 by time division multiplex transmission.

FIG. 5 is a block circuit diagram showing a configuration example of the hot water supply control units 5a, 5b, 5c, the main control unit 6, and the drive unit 7.
．． A signal line 8 for time division multiplex transmission is wired between 7 and 7.

Here, the hot water supply control units 5a, 5b, and 5c include a CPU l0 that performs arithmetic processing such as data setting display and data transmission.
, an operation switch 11 for controlling hot water supply, setting the water temperature, etc.; a display 12 for displaying the water temperature, operating status, and an error code indicating the details of the abnormality in the event of a system abnormality; A sounding body 13 consisting of a piezoelectric buzzer that generates an alarm sound when an alarm occurs, and a transmission input/output circuit 1 that transmits and receives a transmission signal for time-division multiplex transmission of data via a signal line 8.
4, and a stabilizing power supply circuit 15 that rectifies and smoothes the transmission signal to form a circuit power supply (+5V).

The main control unit 6 also includes a CPU 20 that performs arithmetic processing such as a timer clock, data setting display, data transmission, etc., an operation switch 21 that performs control of the timer clock, hot water supply/drain cap operation mode setting, etc. Condition B (standard value)
a setting volume 22 for setting the hot water supply control status, a display 23 for displaying the hot water supply control status, a clock display 24 for displaying the operation of the timer clock and the details of the abnormality in the event of a system abnormality using an abnormality code, Hot water supply to the bathtub is remotely controlled using a sounding body 25 that generates operation sounds and notification sounds when an abnormality occurs, a transmission input/output circuit 26 that transmits and receives transmission signals that time-division multiplex transmits data, and a telephone line. a teleconverter input/output circuit 27 that transmits and receives data to and from the teleconverter 9;
A power outage detection circuit 28 that detects a power outage and a CP when a power outage is detected.
A backup power supply circuit 28a equipped with an emergency storage battery that supplies power to U20, a power supply block 29a forming a system power supply (+24V), and an AC power input through a step-down transformer 29b are stabilized by rectifying and smoothing, C.P.
It is formed of a stabilized power supply circuit 29c that forms a circuit power supply (+5V) that supplies power to U20, and a power switch 30 that turns on and off the power of the entire multi-point hot water supply system except for the CPU 20.

Further, the control circuit block 7a of the drive unit 7 is
A CPU 31 that performs arithmetic processing such as data transmission, water supply and drainage control, hot water temperature control, system abnormality detection, and abnormality notification, and water stop valves 43a to 43 for controlling hot water output to each hot water supply port 4a, 4b, and 4c.
Solenoid driver 3 that drives solenoid c
2, a motor driver 33a that drives the stepping motor of the hot water temperature control gear unit 40a, a motor driver 33b that drives the DC motor of the flow rate control gear unit 42a, and a temperature sensing element consisting of a pair of thermistors that constitute the temperature sensor 41. 41a.

A calculation circuit 34 detects the deviation of the hot water temperature detected by 41b and calculates the deviation from the set hot water temperature, and a watchdog timer detects runaway of the CPU 31 and inputs the detected result to the solenoid driver 32. An abnormal hot water discharge prevention circuit 35 that prevents abnormal hot water discharge from 4a, 4b, and 4c, an automatic drain valve control circuit 36 that controls the opening and closing of the automatic drain valve 47, and a transmission signal that is time-division multiplexed and transmitted via the signal line 8. A control power supply circuit 38a forms a control power supply (+24V) to supply power to the driver, and a stabilization power supply circuit 38b forms a circuit power supply (+5V) to supply power to the CPU 31. 40 out of 0 figures
b is a position detection circuit that detects the operating position of the hot water temperature control gear unit 40a, and 42b is a position detection circuit that detects the operating position of the flow rate control gear unit 42a.

Further, a water stop valve 43a is formed of a solenoid valve.

The water stop control means that controls 43b and 43c is CPO31
, and when stopping the hot water supply, the flow rate control unit 4
2, after outputting a flow rate limiting signal to throttle the flow rate, a hot water tap stop signal (turning off the solenoid) that closes the water stop valves 43a, 43b, and 43c is output, and after restricting the flow rate, the water stop valve 43a, 43b, and 43c, the water hammer phenomenon due to sudden blockage of the flow path does not occur.

By the way, the transmission control means for controlling data transmission between each unit 5a, 5b, 5c, 6.degree. , 5b, 5c, and 6 are sequentially cyclically polled to set the data transmission timing, and time-division multiplex transmission of data such as operation switch data, setting data, abnormality content data, etc. is performed using transmission signals in a predetermined format. It is supposed to be done.

Further, data such as timer time data, hot water temperature setting data, hot water filling amount setting data, etc. are stored in a data memory provided in the main control unit 6, and this data memory is supplied with power by the backup power supply circuit 28a, so that it can be used in the event of a power outage. Prevents data from being lost. Further, when a system abnormality occurs, the contents of the abnormality are determined, an abnormality code corresponding to the abnormality contents is created, and this abnormality code is transmitted to the other unit 5a.

5b, 5c, and 6 is mainly performed by the CPU 31 of the drive unit 7, which receives the error code transmitted via time division multiplexing via the signal line 8 and sends it to the display 12.
The arithmetic processing to be displayed on 24 is carried out by each unit 5a, 5b, 5.
c, is performed on CPU 10°20 of 6. However, each unit 5a, 5b.

Detection of system abnormalities that can be determined individually by 5C16 and creation of abnormality codes are performed by each unit 5a, 5b, 5c, and 6.
In this case, the abnormality code may be transmitted to the other units 5a, 5b, 5c, and 6 via the drive unit 7 and displayed.

FIG. 6 is a front view of the bathtub hot water supply control unit 5a. hot water changeover switch 11b for switching whether to dispense hot water; a hot water supply control switch 11b for dispensing hot water; and a hot water temperature setting switch 11 for setting the temperature of hot water (high/low setting).
1d゛ and set the amount of hot water to be dispensed (setting by more/less)
The display 12, which is formed by hot water volume setting switches lie and lie' that control the flow of water and a drain control switch llf that controls the opening and closing of the drain valve, displays the set water temperature and also indicates the system abnormality. It is formed of a display element 12a that displays the content of the abnormality using an abnormality code, light-emitting diodes 12b and 12b' that display hot/cold water, and a light-emitting diode 12c that displays the status of the drain plug.

FIG. 7 is a front view of the washing area hot water supply control unit 5b integrally formed with the washing area hot water supply port 4b, and a hot water supply control switch ttg for controlling hot water supply from the shower hot water supply port 4c is added to the bathtub hot water supply control unit 5a. However, the drainage control switch llf and the light emitting diode 12c are omitted, and the other configuration and operation are the same as the bathtub hot water supply control unit 5a.

FIG. 8 shows a front view of the shower hot water supply control unit 5c, and the operation switch 11 is a hot water supply control switch lla that controls on/off the hot water supply from the shower hot water supply port 4c.
, a cycle control switch llh that selects whether or not to change the water temperature cyclically when using the shower, and a temperature difference setting switch llh that sets the temperature difference during cycle control.
li, and a pitch setting switch llj that sets the changing pitch during cycle control. In addition, the display 12 that displays the setting state includes a light emitting diode 12d that displays the setting state of cycle control, a light emitting diode 12e that displays the temperature difference (large, medium, small) during cycle control, and a change pitch (fast , normal, slow).

FIG. 9 shows a front view of the main control unit 6, and the operation switches 21 include clock control switches 21a to 21d that adjust the current time of a timer function clock and set the timer time, and a drainage control switch that opens and closes a drain valve. A switch 21e, a hot water supply control switch 21f that controls the fixed amount of hot water from the hot water supply port 4a of the bathtub A, a reserved hot water supply control switch 21g that causes hot water to be filled into the bathtub at a preset time, a normal operation mode, and a reference value. and a mode changeover switch 21h for selecting a correction mode for correcting. In addition, the display 23 that displays the operating status displays the drain valve status (open →
Light-emitting diode 23a that displays hot water supply status (lighting → normal hot water supply, IHz flashing → timer reservation hot water supply, 2Hz flashing → remote hot water supply using teleconverter), light-emitting diode 23b that displays hot water reservation setting (lights on) -> during reservation, off -> cancellation of reservation) Light emitting diode 23C1 Formed by light emitting diodes 23d and 23e that display correction status (direction arrow and proper mark).

On the other hand, the clock display 24 is formed of a liquid crystal display element that displays the current time and timer time, and when an abnormality occurs in the system, the content of the abnormality is displayed using an abnormality code. In addition, the setting volume 22 sets the reference value (standard water temperature) of hot water dispensed from the bathtub hot water supply port 4a by 3.
Volume 2 set in the range of 8 to 45℃ (in 1℃ steps)
2a, a volume 22b for setting the standard value (standard hot water temperature) of hot water dispensed from the shower hot water supply port 4C in the range of 35 to 42°C (in 1°C increments), and a standard value for the person filling the bathtub (
A volume 22c for setting the standard amount of hot water (standard hot water amount) in the range of 150 to 3501 (11 steps), a volume 22d for setting the standard value (standard flow rate) of the hot water output flow rate, the piping situation at the installation site, and the characteristics of the hot water temperature control unit 40. Volume 22a in consideration of variations etc.

The reference correction volume 22e corrects the reference value set by the reference correction volume 22b. In addition, in the example,
The standard temperature of hot water dispensed from the washing area hot water supply port 4b is set to be the same as the standard hot water temperature of the shower hot water supply port 4C.

The operation of the embodiment will be described below. Now, in the multi-point hot water supply system according to the present invention, the hot water mixing means 2 mixes an appropriate amount of water with hot water from the water heater 1 to form hot water at a predetermined temperature. Each hot water supply port 4a,
4b and 4c, hot water supply control and hot water temperature setting can be performed using the hot water supply control switch 11d, Ltd', hot water temperature setting switch 11d, Ltd', and temperature difference setting switch lli. It looks like this. In addition, the volumes 22a and 22b of the main control unit 6
The standard hot water temperature set in
The hot water temperature can be changed using the hot water temperature setting switch lid and lid' at each hot water inlet 4a.

The water temperature set corresponding to 4b is digitally displayed on the display element 12a immediately after the setting is changed.

In addition, since the water stop valves 4a, 4b, 4c that control the hot water supply from the respective hot water supply ports 4a, 4b, 4c are formed of electromagnetic valves, various hot water supply controls can be easily performed electrically. Moreover, after the flow rate is throttled by the flow rate control unit 42, the water stop valve 43
Since water stop control is performed to close the pipes a, 43b, and 43c, it is possible to prevent the water hammer phenomenon from occurring when hot water supply is stopped, thereby preventing damage to the piping system and generation of noise. In addition,
The electromagnetic valves that make up the water stop valves 43a, 43b, and 43c are designed to close when the excitation current of the solenoid is turned off, so hot water is automatically stopped in the event of a power outage to ensure safety. It has become.

[Effects of the Invention] The present invention is configured as described above, and mixes an appropriate amount of water with hot water from a water heater to form hot water at a predetermined temperature, and then supplies hot water via a flow rate control unit and a water stop valve. In a hot water supply system that dispenses hot water appropriately to the mouth, the water stop valve is formed by an electromagnetic valve, and a water stop control means is formed so that the water stop valve is closed after the flow rate is throttled by a flow rate controller. can be,
Various types of hot water supply control can be easily performed electrically, and the water hammer phenomenon can be prevented from occurring when the hot water supply is stopped, thereby preventing damage to the piping system and generation of noise.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing the arrangement of a hot water supply system according to the present invention, Fig. 2 is a schematic configuration diagram of an embodiment of the present invention, Fig. 3 is a top view of the main parts of the same, and Fig. 4 is the main parts of the same. FIG. 5 is a circuit diagram of the same as the above, and FIGS. 6 to 9 are front views of the main parts of the same. 1 is a water heater, 2 is hot water mixing means, 3 is hot water output switching means, 4a, 4b, 4c are hot water supply ports, 5a, 5b, 5c are hot water supply control units, 6 is a main control unit/nod, 7 is a drive unit, 43a, 43b and 43c are water stop valves. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) In a hot water supply system in which hot water from a water heater is mixed with an appropriate amount of water to form hot water at a predetermined temperature, hot water is appropriately discharged from a hot water supply opening via a flow rate control unit and a water stop valve.
A hot water supply system characterized in that a water stop valve is formed by an electromagnetic valve, and a water stop control means is formed so that the water stop valve is closed after the flow rate is throttled by a flow rate control section.