JP2001272101A - Freezing prevention structure of the connection pipe of the water heater - Google Patents

Abstract

(57) [Problem] To provide a method for preventing freezing of a connection pipe of a water heater, which can prevent freezing of a connection pipe. A water heater (10a, 1b) for detecting the water temperature of connection pipes (13, 14) connected to water heaters (10a, 10b) with a temperature detector (12) to prevent freezing of water in the connection pipes (13, 14).
0b is a structure for preventing freezing of the connection pipes 13 and 14, wherein the connection pipes 13 and 14 are provided with a heater 24, and the temperature detector 12 is installed in the water heaters 10a and 10b. The heater 24 controls the heating of the water in the connection pipes 13 and 14 based on the set temperature of the temperature detector 12.

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 of a connection pipe of a water heater.

[0002]

2. Description of the Related Art Conventionally, as a structure for preventing freezing of a connection pipe of a water heater, an outside air temperature near the connection pipe and a water temperature in the connection pipe are detected to heat the connection pipe from the outside or to connect the connection pipe. The water in the connection pipe is forcibly circulated to prevent the water in the connection pipe from freezing.

As a conventional structure for detecting water temperature, as shown in FIG. 5, a connection pipe is provided between a water heater 10 and a bath 30 and hot water is circulated from a water heater 40 by a circulation pump 11 to form a bath 3.
0. Connection lines 13, 14 to prevent freezing
The detector 29 is installed in the vicinity of, or the detector 31 is installed inside the exterior of the water heater 40 for measurement.

[0004] Japanese Patent Laid-Open No.
No. 3,331,216. In the above description,
The anti-freezing device for the water heater includes a temperature detector for detecting a temperature of a water passage of the water heater, an electric heating unit for heating the water passage, and detection based on detection information of the temperature detector. A control panel for heating the electric heating means when the temperature is equal to or lower than a set temperature for starting heating is provided, and the characteristic configuration thereof is a water supply channel portion and a tap water channel portion of the water channel. Opening / closing means for opening / closing a bypass which connects to the control panel is provided, and the control panel is configured such that water in the water passage portion convects through the bypass passage along with heating of the electric heating means. There is provided an anti-freezing device for a water heater, which is configured to open and close the opening / closing means and can efficiently prevent the water passage portion from freezing.

[0005]

In the above-described conventional freeze prevention device for the water heater 40 as shown in FIG. 5, when the temperature detector 29 is installed near the connecting pipe, the water heater 40 is not affected by snowfall. Provide an enclosure etc. in the water heater 40 so that it can be avoided,
Depending on the location of the water heater 40, there is another heat source nearby.

In such a state, a measurement difference occurs between the detected temperature and the actual outside air temperature, and there has been a problem that the detection of the water temperature in the connecting pipe cannot be accurately detected. Further, when the connection pipe lines 13 and 14 are kept warm by a forced circulation method, there is a problem that heat loss of the heater 24 that keeps keeping the heat occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a structure for preventing freezing of a connection pipe of a water heater that prevents freezing of a connection pipe. It is.

[0008]

According to the first aspect of the present invention, there is provided a structure for preventing freezing of a connection pipe of a water heater, wherein a water temperature of the connection pipe connected to the water heater is detected by a temperature detector, and the connection pipe is detected. A freeze prevention structure for a connection pipe of a water heater that prevents freezing of water in a road, wherein the connection pipe is provided with a heater, and the temperature detector is installed in the water heater. The heater is
The heating of the water in the connection pipe is controlled based on the set temperature of the temperature detector.

According to a second aspect of the present invention, in the structure for preventing freezing of a connection pipe of a water heater, the temperature detector is provided in a hot water storage tank of an electric water heater.

According to a third aspect of the present invention, there is provided a structure for preventing freezing of a connecting pipe of a water heater, wherein the detected temperature of the temperature detector is displayed on an alarm display panel so as to be visually observed.

According to a fourth aspect of the present invention, there is provided a structure for preventing freezing of a connection pipe line of a water heater, wherein the heater can be manually operated.

[0012]

According to the first aspect of the present invention, in the structure for preventing freezing of a connection pipe of a water heater, a heater is provided in the connection pipe.
The temperature detector is installed in the water heater, and the heater controls the heating of the water in the connection pipe based on the set temperature of the temperature detector. Since it is installed in the water heater following the pipeline, there is no detection error due to the installation position, and the water temperature in the connection pipeline can be accurately detected,
It is possible to prevent the connection pipeline from freezing.

According to the second aspect of the present invention, in the structure for preventing freezing of the connection pipe of the water heater, the temperature detector is provided in the hot water storage tank of the electric water heater. In comparison, there is no measurement error of the outside air temperature, the temperature of the water in the hot water tank following the connecting pipe can be accurately detected, and the freezing of the connecting pipe can be prevented.

According to the third aspect of the present invention, the structure for preventing freezing of the connection pipe of the water heater is configured so that the temperature detected by the temperature detector is displayed on an alarm display panel so that the temperature can be visually checked. You can take precise freeze measures.

According to the fourth aspect of the present invention, since the heater can be manually operated, the on / off control of the heater can be more finely controlled than in the automatic operation. The heat radiation from the device can be minimized.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a freeze prevention structure of a connection pipe of a water heater according to the present invention, FIG. 2 is an explanatory view showing a freeze prevention structure of a connection pipe using an electric water heater as a water heater, FIG. 3 is an explanatory diagram for displaying the annual water temperature change on a graph, and FIG. 4 is an explanatory diagram for displaying a freezing warning.

As shown in FIG. 1, a water heater 10a of the present invention is provided.
Of the connection pipes 13 and 14 of the water heater 10a
And connection conduits 13, 14 connected to the water heater 10a.
And a heater 24 for heating the water in the connection conduits 13 and 14,
A control panel 27 for controlling the heater 24 and a temperature detector 12 for detecting the water temperature are provided, and the connection pipe 1 of the water heater 10a is provided.
3, 14 can be prevented from freezing.

The temperature detector 12 is provided with the water heater 10a.
The temperature of the water in the connection pipes 13 and 14 is controlled based on the set temperature of the temperature detector 12.

The connection pipe lines 13 and 14 connect the hot water heater 10a and the bathtub 30 by pipe so that water and hot water in the bathtub 30 can be circulated. The connection pipe 13 is provided with a circulation pump 11 that can circulate water and hot water.

The connection pipe 14 is provided with a heater 24 capable of heating water and hot water in the connection pipes 13 and 14.
As the heater 24, an electric heater, a gas heater, or the like is used.

FIG. 2 shows an embodiment of a connection pipe freezing prevention structure using an electric water heater as the water heater 10b. FIG.
As shown in the figure, the connection pipes 13 and 1 of the water heater 10b of the present invention.
In the freeze prevention structures 4 and 15, the temperature detector 12 is provided in the hot water storage tank 11 of the electric water heater so that the connection pipe can be prevented from freezing.

The water heater 10a and the bathtub 30 are connected to the connecting pipe 1
3 and 14 are connected so that the water and hot water in the bathtub 30 can be circulated, and the water and hot water in the bathtub 30 can be automatically and manually circulated and supplied.

The connection pipe 13 is provided with an electric heater as a heater 24. The heater 24 heats the bathtub 30 to the set temperature when the temperature of the hot water drops below the set temperature.

A temperature detector 26 is provided in the connection line 13 so that the temperature of the hot water in the bathtub 30 can be detected. The connection pipe 13 is provided with a flow sensor 22 so that the water temperature in the bathtub 30 can be monitored.

A circulation pump 18 is provided in the connection pipe line 14 so as to monitor the temperature of the water and the hot water in the bathtub 30 and to circulate the water and the hot water. Further, the connecting pipe 14 has a bathtub 30.
A water level sensor 19 that can monitor the water level is provided.

A motor-operated valve 23 is provided in the vicinity of the branch of the connection pipe 14 from the connection pipe 13 to switch the connection pipe.

The hot water storage tank 11 of the water heater 10b is connected to the connection pipe 1
5 is supplied with primary water via a pressure reducing valve 25.
A temperature detector 12 is provided in the hot water storage tank 11.

The temperature detector 12 is provided at a lower portion of the hot water storage tank 11 so that the temperature of the supplied water can be detected, so that the temperature of the supplied water can be detected.

The temperature detector 12 is thus connected to the hot water storage tank 11.
Since it is installed inside, there is no detection error between the outside air temperature and the detection temperature depending on the installation location and the water temperature. A heater 111 is provided in the hot water storage tank 11 so that the water can be heated to a set temperature.

The hot water in the hot water storage tank 11 can be mixed with the hot water, the water from the connection pipe 15 and the hot water by the electric mixing valve 20 via the connection pipe 16. Electric mixing valve 20
The heated hot water is sent to the pressure feed hopper 21.

The hot water from the water heater 10b, the water from the bathtub 30, and the hot water can be mixed in the pressure feeding hopper 21. The pressure feed hopper 21 is composed of a water supply solenoid valve and a hopper. The water supply solenoid valve controls hot water supply, and the hopper prevents water from the bathtub 30 and hot water from flowing back to the water heater 10b.

The water heater 10b is provided with a control panel 27 for controlling the electric mixing valve 20 and the like. Control panel 27
Can control the temperature detectors 12 and 26, the electric mixing valve 20, the pressure feed hopper 21, the heater 24, the circulation pump 18, and the water level sensor 19.

An alarm display panel 28 is provided which can display information from the control panel 27 at a separate position. The alarm display panel 28 can display the temperature detected by the temperature detector 12 in conjunction with the control panel 27.

The connection pipes 13, 1 of the water heater 10b of the present invention
The freeze prevention structure of No. 4 displays the temperature detected by the temperature detector 12, which is the temperature detector, on the alarm display panel 28 so that it can be visually observed.

Further, the connection pipe line 1 of the water heater 10b of the present invention.
The anti-freeze structures 3 and 14 allow the heater 24 of the heater to be manually operated. Normally, automatic operation is performed. However, when the temperature is frozen, the operation can be manually performed while monitoring the alarm display panel 28 to perform fine water temperature management.

As shown in FIG. 3, a change in the water temperature throughout the year is measured by the temperature detector 12, and the time when the possibility of freezing appears due to the decrease in the water temperature can be displayed. Circulation pump 18 for circulating water and hot water in connection pipe lines 13 and 14
The operation of the heater and the timing of the start of heating of the heater 24 can be managed in detail automatically and manually to minimize the heat radiation loss of the heater 24.

As shown in FIG. 4, the water temperature was 1 for 3 consecutive days.
An alarm is displayed on the alarm display panel 28 at the time of the point A which becomes 0 degrees or less. The alarm display is displayed continuously for two hours after the end of automatic hot water supply. The alarm display can be canceled by canceling the setting.

As described above, the freeze prevention structure of the connection pipes 13 and 14 of the water heater 10a of the present invention
Is installed in the water heater 10a, and the temperature detector 12
Since the connection pipes 13 and 14 are controlled to be heated based on the set temperature, the temperature detector 12 is installed in the water heater 10a following the connection pipe, so that it is installed in the connection pipes 13 and 14. In this case, there is no detection error due to the installation position, and the water temperature in the connection pipes 13 and 14 can be accurately measured by simulation.
3, 14 can be prevented from freezing.

Further, the connection pipe line 1 of the water heater 10b of the present invention.
In the anti-freezing structures 3 and 14, the temperature detector 12 is provided in the hot water storage tank 11 of the electric water heater.
Compared with the case where the connection pipes are installed in the storage pipes 3 and 14, there is no measurement error of the outside air temperature, the water temperature in the hot water storage tank 11 following the connection pipe 15 can be accurately detected, and the connection pipes 13 and 14 can be prevented from freezing. .

The anti-freezing structure of the connection pipes 13 and 14 of the water heaters 10a and 10b according to the present invention is the same as that of the temperature detector 12
Is displayed on the alarm display panel 28 so that a freezing alarm can be displayed on the alarm display panel 28, and the user can take a thorough countermeasure against freezing.

Further, the freezing prevention structure of the connecting pipes 13 and 14 of the water heaters 10a and 10b according to the present invention allows the heater to be operated manually, so that the on / off control of the heater can be performed more precisely than in the automatic operation. In addition, heat radiation of the heating heat can be minimized.

[0042]

According to the first aspect of the present invention, in the structure for preventing freezing of the connection pipe of the water heater, a heater is provided in the connection pipe, and the temperature detector is installed in the water heater. Being
Since the heater controls the heating of the water in the connection pipe based on the set temperature of the temperature detector, the temperature detector is installed in the water heater following the connection pipe, so that the heater is installed. There is no detection error due to the position, the temperature of the water in the connecting pipe can be accurately detected, and freezing of the connecting pipe can be prevented.

According to the second aspect of the present invention, in the structure for preventing freezing of the connection pipe of the water heater, the temperature detector is provided in the hot water storage tank of the electric water heater. In comparison, there is no measurement error of the outside air temperature, the temperature of the water in the hot water tank following the connecting pipe can be accurately detected, and the freezing of the connecting pipe can be prevented.

According to the third aspect of the present invention, the structure for preventing freezing of the connection pipe of the water heater is configured so that the temperature detected by the temperature detector is displayed on an alarm display panel so that the temperature can be visually checked. You can take precise freeze measures.

According to the fourth aspect of the present invention, since the heater can be manually operated, the on / off control of the heater can be performed more precisely than in the automatic heater. Heat radiation can be minimized.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a structure for preventing freezing of a connection conduit of a water heater according to the present invention.

FIG. 2 is an explanatory view showing an embodiment of a structure for preventing freezing of a connection pipe of a water heater.

FIG. 3 is an explanatory diagram showing an annual water temperature change in a graph.

FIG. 4 is an explanatory view showing a warning of freezing.

FIG. 5 is an explanatory diagram showing water temperature detection of a connection pipe line of a conventional water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10a Water heater 10b Electric water heater 11 Hot water tank 12 Temperature detector 13, 14 Pipe line 15, 16 Pipe line 18 Circulation pump 19 Water level sensor 20 Electric mixing valve 21 Pumping hopper 22 Flow switch 23 Electric valve 24 Heater 25 Pressure reducing valve 26 Temperature detector 27 Control panel 28 Alarm display panel 30 Bathtub

Claims (4)

[Claims] 1. A structure for preventing freezing of a connection pipe of a water heater, wherein a temperature of a connection pipe connected to the water heater is detected by a temperature detector to prevent freezing of water in the connection pipe. A heater is provided in the pipeline, the temperature detector is installed in the water heater, and the heater controls heating of water in the connection pipeline based on a set temperature of the temperature detector. A structure for preventing freezing of a connection pipe of a water heater. 2. The structure for preventing freezing of a connection pipe of a water heater according to claim 1, wherein the temperature detector is provided in a hot water tank of an electric water heater. 3. The structure for preventing freezing of a connection pipe of a water heater according to claim 1, wherein the temperature detected by said temperature detector is displayed on an alarm display panel so as to be visible. 4. The structure for preventing freezing of a connection pipe of a water heater according to claim 1, wherein the heater can be manually operated.