JP2002147841A - Forced circulation and wall-penetrating installation type bath boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forced circulation and wall-penetrating installation type bath boiler capable of shortening the self-priming period of time of a circulation pump upon employing re-heating. SOLUTION: In the forced circulation and wall-penetrating installation type bath boiler, installed in an opening bored in a bathtub wall and circulating bathtub water forcibly employing the circulation pump, the negative pressure side of the circulation pump is connected to a bathtub through a returning pipe, the positive pressure side of the circulation pump is connected to the inlet side of a heat exchanger through a water inlet pipe, the outlet side of the heat exchanger is connected to the bathtub through a sending pipe and a check valve is provided on the half way of the returning pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced-circulation type bath-cooker.

[0002]

2. Description of the Related Art A forced-trunk type bath penetrating wall bath has a circulating water channel formed by connecting a heat exchanger for heating water, a bathtub and a bathtub with an outgoing pipe and a return pipe, A circulation pump is provided in the return pipe to forcibly circulate bathtub water.

[0003]

However, as shown in FIG. 3, when the through-wall type bath is installed at a high place and the reheating operation is performed, the height H from the circulation pump to the bathtub water surface is increased by pressure. However, there is a problem in that the self-priming of the circulating pump takes time because water in the return pipe comes off. Therefore, when the reheating operation is performed, it takes an ignition time, which makes the user uncomfortable.

[0004] It is an object of the present invention to provide a forced circulation type wall penetration type bath kettle capable of shortening the self-priming time of the circulation pump at the time of additional heating.

[0005]

SUMMARY OF THE INVENTION A forced circulation type wall-mounted bath kettle of the present invention is installed in an opening formed in a bathtub wall, and forcibly circulates bathtub water using a circulation pump. In the forced circulation type through-the-wall bath kettle, the negative pressure side of the circulation pump and the bathtub are connected by a return pipe, and the positive pressure side of the circulation pump and the inlet side of the heat exchanger are connected by a water inlet pipe. Then, the outlet side of the heat exchanger and the bathtub are connected by a going pipe,
A check valve is provided in the middle of the return pipe.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The check valve used in the present invention is provided in a return pipe for sending out bathtub water to a circulation pump. There is no particular limitation as long as it is possible to prevent the water in the return pipe from leaking to the bathtub water surface.

[0007]

Embodiments of the present invention will be described below.
FIG. 1 is a sectional view of a forced-circulation type bath-cooker of a forced circulation type showing an embodiment of the present invention. The structure of the forced circulation type through-wall type bathtub 1 of this embodiment will be described. Inside the forced circulation type through-wall type bathtub 1, a heat exchanger 6 is installed. , The water inlet pipe 25 is wound. The heat exchanger 6 introduces the combustion gas to the burner 12 via the gas source solenoid valve 7 and the gas solenoid valve, and adjusts the combustion amount by the gas proportional valve 21. Air required for combustion is sent to the burner 12 by the fan 5 provided above the heat exchanger 6. The connection between the bathtub 18 and the forced-circulation type bath pen tube 1 is made by connecting the negative pressure side of the circulation pump 22 and the bathtub 18 with a return pipe 24, and connecting the outlet side of the heat exchanger 6 and the bathtub 18. Is connected to the outgoing pipe 23. The return pipe 24 was provided with a check valve 4 to form a water passage. FIG. 2 is a structural diagram of the check valve 4 shown in FIG. The water sucked from the bathtub 18 reaches the valve body 20. The valve body 20 is moved by the water pressure, and the water flows into the circulation pump 22. When the return pipe 24 is closed by the valve body, the water in the return pipe is prevented from being drained. Hereinafter, the operation of the forced circulation type bath-tub 1 will be described in detail with reference to FIG. The user uses the remote control 1
When the reheating switch 9 is depressed, the microcomputer (not shown) mounted on the control board 2 operates the circulation pump 22 to circulate the bathtub water. The solenoid valve 7 and the gas solenoid valve 8 are opened, and the combustion gas is sent to the burner 12.
The microcomputer opens the gas source electromagnetic valve 7 and the gas electromagnetic valve 8, makes the gas pressure constant by the gas governor 9, and controls the ignition plug 11 by using the ignition transformer 13.
The burner 12 is ignited. When the microcomputer detects that the burner 12 has been ignited by the frame rod 10, the microcomputer detects the temperature of the bathtub water circulated by the thermistor 15. The microcomputer adjusts the opening of the gas proportional valve 21 based on the water temperature information obtained from the thermistor 15,
The reheating operation is continued until the water temperature reaches the reheating temperature set by the user. When the thermistor 15 detects that the bathtub water has reached the reheating temperature, the microcomputer opens the gas source solenoid valve 7 and the gas solenoid valve 8 and elapses about 30 seconds from the stop of combustion in order to avoid boiling in the pipe. After the circulation pump 22
To stop. The check valve closes the return pipe 24.

[0008]

Since the present invention is configured as described above, the following effects can be obtained. When reheating the bathtub water at a high place, a check valve is provided between the bathtub and the circulation pump to prevent the water in the pipe from returning from the circulation pump to the bathtub water level, and the self-priming time of the circulation pump. Can be shortened, so that the ignition time is shortened and the user can use the apparatus without feeling uncomfortable.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a forced-circulation type wall-installed bath kettle showing one embodiment of the present invention.

FIG. 2 is a sectional view of the check valve 4 shown in FIG.

FIG. 3 is a schematic cross-sectional view showing an installation example of a forced-circulation type wall penetration installation type bath kettle according to an embodiment of the present invention.

[Explanation of symbols]

1. 1. Bathtub with forced circulation through wall Control board 3. Gas nipple 4. Check valve 5. Fan 6. Heat exchanger 7. Gas source solenoid valve 8. Gas solenoid valve 9. Gas governor 10. Frame rod 11. Spark plug 12. Burner 13. Ignition transformer 14. Water flow switch 15. Thermistor 16. Bath return joint 17. Bath going joint 18. Bathtub 19. Remote control 20. Bathroom drying and heating machine 21. Gas proportional valve 22. Circulation pump 23. Outgoing pipe 24. Return pipe 25. Inlet pipe 26. Spring

Claims (1)

[Claims] 1. A forced circulation type through-the-wall type bathtub installed in an opening formed in a bathtub wall and forcibly circulating bathtub water by using a circulation pump. The pressure side and the bathtub are connected by a return pipe, the positive pressure side of the circulation pump and the inlet side of the heat exchanger are connected by a water inlet pipe, and the outlet side of the heat exchanger and the bathtub are connected by a going pipe. And a forced circulation type wall penetration type bath kettle provided with a check valve in the middle of the return pipe.