JPH11229451A - Antifreeze structure in hot water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely prevent freezing by providing a valve for opening/closing a hot water delivery part and a temperature-sensor in a pipe and install a controller to open the valve when the sensor detects a water temperature lower than a specified temperature. SOLUTION: Solenoid valves 2 are installed in both hot water supply pipe line 12 and water supply pipeline 13 and a temperature sensor 3 is equipped in a confluent pipeline 14. When the temperature sensor 3 equipped in the confluent pipeline 14 detects a lower water temperature than a specified value, a detected signal is input from the temperature sensor 3 into a controller 4. A hot water delivery part 1 is opened by the output signal from the controller 4 to delivery hot water and discharge water in the pipeline by the controller. That is, the opening/closing valve 2 attached to the hot water supply pipeline 12 is opened and water and hot water are supplied from the hot water supply pipeline 12 and the water supply pipeline 13 and discharged from a faucet 8 or shower head 9 for a hot water discharge part 1. Accordingly, freezing of water in a water pipeline can be automatically prevented in a cold time, in a simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing freezing in a hot and cold water supply device.

[0002]

2. Description of the Related Art In general households, since there is a distance from a water heater to a hot and cold water spouting section, there is a problem that pipes, steam, shower hoses, etc. are frozen at low temperatures. For this reason, in the related art, there is a method in which a heater for keeping heat is separately provided in the pipe to keep the inside of the pipe warm, but there is a problem that the cost increases.

[0003] In addition, in ordinary households, it is common practice to drain water little by little on days when it is likely to freeze, but this is done by opening the noodles by hand, which is troublesome. Also, on the day when it seems to be freezing, forget to open the garment a little in advance and the water in the pipe will be frozen, or open the garbage and open the water little by little. However, in some cases, the temperature does not drop so much that the temperature freezes on that day, and in such a case, there is a problem in that water is wasted.

In the past, a strainer was arranged in a pipe to catch dust. However, even if the strainer is clogged and the flow rate gradually decreases, it is not noticed in ordinary households.
There was a problem that people would not notice that they were blocked until the situation got worse.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to reliably prevent freezing with a simple structure and to easily know the strainer clogging. Another object of the present invention is to provide a freezing prevention structure in a hot and cold water supply device which can perform the above-mentioned.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a freezing prevention structure in a hot water supply apparatus of the present invention is provided for opening and closing a hot water discharge section 1 in a hot water supply pipe structure having a hot water discharge section 1. And a control unit 4 for controlling the opening and closing of the on-off valve 2 when the temperature detection sensor 3 detects a water temperature equal to or lower than a predetermined temperature. It is characterized by being provided. With such a configuration, when the water temperature in the pipe becomes equal to or lower than a predetermined temperature, the temperature is detected by the temperature detection sensor 3, and a detection signal of the temperature detection sensor 3 is input to the control unit 4. The control signal causes the on-off valve 2 to open and the hot and cold water spouting section 1 to open to flow water. When the temperature falls below a predetermined temperature, water flows, thereby preventing freezing of water in the piping.

It is preferable to provide a strainer 5 and a flow sensor 6 in the pipe, and to provide a notifying means 7 for notifying when the flow sensor 6 detects a predetermined flow rate or less. With such a configuration, when the strainer 5 provided in the pipe is clogged, the flow rate decreases. In this case,
When the flow rate becomes equal to or less than the predetermined flow rate, the flow rate sensor 6 detects the flow rate, and a detection signal of the flow rate sensor 6 is input to the control unit 4.
Is notified by the notifying means 7 according to the control signal from the control unit, and it can be understood that the strainer 5 is clogged.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings. FIG. 1 shows an embodiment of a hot and cold water supply device. In this hot and cold water supply device, there are a water discharge port 8 and a shower head 9 provided at a tip end of a shower hose 9a as a hot water discharge section 1. A shower hose 9a provided with a shower head 9 as the hot and cold water spouting section 1 at a tip end thereof, and a pipeline on an upstream side of the water spouting port 8 are branched from the switching electric valve 10, respectively.
The switching electric valve 10 switches the supply of hot water to the water outlet 8 or the shower head 9. In addition, the pipeline on the upstream side of the switching motor-operated valve 10 is branched into two, and one of the pipelines is a hot water supply pipeline 12, and the on-off valve 2 composed of an electromagnetic valve is provided. The other pipe is a water supply pipe 13 in which the on-off valve 2 composed of an electromagnetic valve is provided. The hot water supply pipe 12 and the water supply pipe 13 join to form one joining pipe 14.
In this merged conduit 14, a temperature detecting sensor 3 for detecting the water temperature in the conduit and a flow sensor 6 for detecting the flow rate in the conduit are provided. It is. A strainer 5 is provided in the pipeline (in the vicinity of the on-off valve 2 in the embodiment shown in the accompanying drawings) to catch foreign substances such as dust.

Reference numeral 15 denotes an operation display panel, which is provided with a tapping / water stopping switch 15a, a changeover switch 15b, and a flow rate adjusting switch 15c, which are touch switches. The operation display panel 15 further includes a strainer. There is provided a clogging notification light emitting display section 7a which constitutes a notifying means 7 for displaying clogging. By operating the hot water / water stop switch 15a, the on-off valve 2 is opened and closed to discharge hot water from the hot water discharge port 8 or the shower head 9 which is the hot water discharge section 1, or to stop water discharge. The control is performed by the control unit 4 as described above. Further, the control unit 4 is controlled to rotate the switching electric valve 10 to switch between water discharge from the water discharge port 8 and water discharge from the shower head 9 by operating the changeover switch 15b. It is. Further, the amount of hot water is adjusted by operating the flow rate adjusting switch 15c. In this case, for example, a plurality of water passage holes having different diameters are provided in the switching electric valve 10, and the water passage hole communicating with the water outlet 8 or the shower head 9 changes depending on the rotation angle of the switching electric valve 10. Thus, the flow rate can be adjusted.

Further, in the present invention, the temperature detection sensor 3 is provided in the pipe, and the water temperature below a predetermined temperature by the temperature detection sensor 3 (that is, the water temperature at which the water freezes when the water is stagnant without flowing through the pipe). ), And when a detection signal from the temperature detection sensor 3 is input to the control unit 4, the control unit 4
The hot water spouting unit 1 is opened by the output signal from the control unit, so that the water is spouted and the water in the pipe flows. Specifically, the on-off valve 2 provided in the hot water supply line 12 and the water supply line 1
3 is opened, the hot water supply pipe 12 side,
Water flows from the water supply pipe 13 side and is discharged from the hot water discharge port 1 or the water discharge port 8 or the shower head 9, so that water staying in the pipe at a low temperature freezes and the pipe is discharged. Damage can be prevented.

Further, in the present invention, the flow rate in the pipe is detected by the flow rate sensor 6, and when the flow rate becomes equal to or less than the predetermined flow rate, a notification signal 7 from the control unit 4 notifies the flow rate. That is, in the embodiment shown in the accompanying drawings, the clogging notification light emission display section 7a constituting the notification means 7 is notified by emitting light.
Here, in the case where the flow rate adjusting switch 15c is provided as in the embodiment and the flow rate can be adjusted in multiple stages, for example, the flow rate in the pipe is set in a state where the flow rate is adjusted to the maximum flow rate by the flow rate adjusting switch 15c. Is detected by the flow sensor 6, and the control unit 4 controls so that the notifying unit 7 notifies when the flow rate at this time becomes equal to or less than a certain flow rate. The user can know that the strainer 5 is clogged by knowing the decrease in the flow rate by the notification means 7 as described above, and the flow rate is extremely reduced and the situation is deteriorated. The strainer 5 can be cleaned before returning to the original flow rate.

[0012]

According to the first aspect of the present invention, as described above, in the piping system for supplying hot and cold water having the hot and cold water spouting section, an on-off valve for opening and closing the hot and cold water spouting section is provided. A temperature detection sensor is provided in the pipe, and a control unit is provided for controlling the opening and closing valve to open when the temperature detection sensor detects a water temperature below a predetermined temperature, so that the water temperature in the pipe is lower than the predetermined temperature. When this happens, the temperature detection sensor detects this, the on-off valve opens, the hot and cold water spouting part opens, and water flows, and automatically prevents freezing of water in the piping in cold weather with a simple configuration Is what you can do.

According to the second aspect of the present invention, in addition to the effect of the first aspect, a strainer and a flow rate sensor are provided in the pipe, and when the flow rate sensor detects a predetermined flow rate or less. The flow rate sensor detects when the flow rate becomes equal to or less than a certain flow rate, and notifies the notification means to notify that the strainer is clogged. It is possible to know a decrease in the flow rate due to clogging, and to clean the strainer at an early stage so that the flow rate does not extremely decrease.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a control block diagram of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot-water discharge part 2 On-off valve 3 Temperature detection sensor 4 Control part 5 Strainer 6 Flow sensor 7 Notification means

Claims (2)

[Claims] In a piping structure for supplying hot and cold water having a hot and cold water discharging portion, an on-off valve for opening and closing the hot and cold water discharging portion is provided, a temperature detecting sensor is provided in the piping, and a temperature detecting sensor detects a water temperature below a predetermined temperature. A freezing prevention structure in the hot and cold water supply device, comprising a control unit for controlling the opening and closing valve to open when the detection is performed. 2. A freezing apparatus according to claim 1, wherein a strainer and a flow sensor are provided in the pipe, and a notifying means is provided for notifying when a predetermined flow rate or less is detected by the flow sensor. Prevention structure.