JP3667973B2 - Water heater with remembrance - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water supply device with a remedy provided with a hot water supply device that performs hot water supply and a remedy device that raises the temperature of hot water supplied from the hot water supply device and stored in a bathtub.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a hot water supply device with a remedy provided with a hot water supply device I and a remedy device II as shown in FIG. 2 is known. In the hot water supply apparatus I, a is a water supply channel through which water is supplied, b is a hot water supply heat exchanger that is heated by a hot water supply burner c to raise the temperature of the water from the water supply channel a, and d is heated by a hot water supply heat exchanger b. A hot water supply passage for supplying the hot water generated to the bathtub e and a drain outlet for discharging hot water in the hot water supply passage d when provided in the hot water supply passage d and opened.
[0003]
In the memorial device II, g is a memorial path branched from the hot water supply path d and connected to the bathtub e, and h is provided in the hot water supply path d downstream from the branch position with the memorial path g. A pump that pumps hot water from e downstream from the hot water supply path d and sends it to the memorial path g, i is a memorial heat exchanger that heats the hot water in the memorial path g by being heated by the memorial burner j, and k is an additional heat exchanger This is a check valve provided in the hot water supply path d upstream from the branch position with the bottleneck g to prevent the hot water from flowing back upstream of the hot water supply path d.
[0004]
According to the hot water supply device with such a structure, when hot water is supplied from the hot water supply device I to the bathtub e, some hot water reaches the bathtub e from the hot water supply path d via the pump h, and the remaining hot water starts from the middle. Branch to memorial road g and reach bathtub e. At this time, the pump h and the memory heat exchanger i do not operate. When the chasing device II performs chasing, the pump h is activated, and the hot water in the bathtub e is fed from the downstream side of the hot water supply channel d toward the chasing channel g. At the same time, the remedy heat exchanger i is also operated, and the hot water sent to the remedy passage g is heated and returned to the bathtub e by the pump h.
[0005]
However, since the branch position between the hot water supply path d and the tracking path g is on the discharge side of the pump h, when the pump h is operated, water pressure is applied toward the upstream side of the hot water supply path d, and the water pressure in the hot water supply path d is increased. There is a possibility that the excessive increase in the size of the check valve k may result in a decrease in the durability of the check valve k and avoid the backflow. Further, when cleaning the hot water supply channel d, it is necessary to drain the hot water from the hot water supply channel d, but there is a possibility that the hot water may not be sufficiently discharged simply by opening the drain port f and discharging it naturally.
[0006]
[Problems to be solved by the invention]
It is an object of the present invention to provide a hot water supply apparatus with a chasing that can eliminate such inconveniences and can reliably prevent back flow of hot water upstream of the hot water supply passage and can sufficiently discharge hot water from the hot water supply passage.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, a hot water supply apparatus with a remedy according to the present invention includes a hot water supply apparatus that performs hot water supply, and a remedy apparatus that performs warming by heating the hot water supplied from the hot water supply apparatus and stored in a bathtub. The hot water supply path connecting the hot water supply device to the bathtub, the hot water path branched from the hot water supply path and connected to the bathtub, and the hot water provided in the hot water path a heat exchanger, in additionally fueled water heater and a pump for sending hot water bath tank towards該追焚熱exchanger additionally焚時provided additionally焚路upstream of該追焚熱exchanger, fed-yu The passage has a drain outlet provided upstream from the branch point with the follow-up path, an openable / closable hot water solenoid valve provided downstream from the branch outlet and upstream from the branch point, and downstream of the drain outlet. And a check valve provided upstream of the branch point to prevent the backflow of hot water upstream of the hot water supply passage, and water in the hot water supply passage When performing can is characterized by discharging opening the fed-water solenoid valve in a state in which the exhaust water outlet is opened by operating the pump hot water fed-water path to the bath tank.
[0008]
According to the hot water supply apparatus with such a configuration, the pump is operated to feed the hot water in the bathtub to the memorial path, the temperature is raised by the memorial heat exchanger heated by the memorial heating means, and then returned to the bathtub again. It is sent in and memorialized. Since the branching position of the tracking path from the hot water supply path is on the suction side of the pump, water pressure is not applied toward the upstream side of the hot water supply path even if the pump is operated. For this reason, when a check valve is provided in the hot water supply path, excessive water pressure is not applied to the check valve due to the operation of the pump, and the back flow of hot water toward the upstream of the hot water supply path can be reliably avoided. Moreover, the hot water remaining in the hot water supply path can be reliably discharged by operating the pump when draining the hot water supply path and discharging the hot water in the hot water supply path to the bathtub.
[0009]
In the hot water supply device with the above-described configuration, the pump may be operated during hot water supply from the hot water supply device to the bathtub. By operating the pump, hot water flows not only in the hot water supply path but also in the remedy path when hot water is supplied to the bathtub, so that the pump can be operated normally during remedy without causing air clogging.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a hot water supply apparatus with a supplement according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory configuration diagram of a hot water supply apparatus with a supplement according to the present invention.
[0012]
In the hot water supply apparatus with a remedy shown in FIG. 1, 1 is a hot water supply apparatus that supplies hot water, and 2 is a remedy apparatus that raises the temperature of hot water supplied from the hot water supply apparatus 1 and stored in the bathtub 3. The hot water supply device 1 and the chasing device 2 are controlled by a controller (not shown).
[0013]
In the hot water supply apparatus 1, 4 is a water supply path through which water is supplied, 5 is a hot water supply heat exchanger that is heated by the hot water supply burner 6 to raise the temperature of the water from the water supply path 4, and 7 is hot water from the hot water supply heat exchanger 5. A hot water supply path for supplying water to the bathtub 3, 8 is a bypass path for mixing a part of water from the water supply path 4 to the hot water supply path 7, and 9 is a hot water supply gas supply path for supplying gas to the hot water supply burner 6.
[0014]
The water supply path 4 is provided with a water amount sensor 10 for detecting the amount of water supply, and a water amount adjustment valve 11 for adjusting the water supply amount by adjusting the opening degree thereof. The hot water supply heat exchanger 5 is supplied with a hot water ignition plug 13 that is applied with a high voltage via an igniter 12 to ignite the hot water supply burner 6, a hot water supply fan 14 that supplies combustion air to the hot water supply burner 6, A hot water supply frame rod 15 for detecting the combustion state of the hot water supply burner 6 is provided. In the hot water supply path 7, a shower hot water supply path 16 is branched and provided downstream from the joining position with the bypass path 8. The hot water supply passage 7 is provided with a hot water supply temperature sensor 17 at a branch position with the shower hot water supply passage 16 to detect a hot water supply temperature downstream from the joining position with the bypass passage 8. The hot water supply path 7 is provided with a hot water solenoid valve 18 that opens and closes the hot water supply path 7, a check valve 19 that prevents back flow of hot water upstream of the hot water supply path 7, and a hot water amount sensor 20 that detects the amount of hot water supply. The shower hot water channel 16 is provided with a drain port 21 for discharging hot water from the hot water channel 7, a hot water tap 22 opened and closed by a user, and a shower head 23 for supplying hot water in a shower form. . The bypass passage 8 is provided with a bypass electromagnetic valve 24 for adjusting the opening degree thereof. The hot water supply gas supply path 9 is provided with a hot water supply gas proportional valve 25 for adjusting the gas supply amount to the hot water supply burner 6 and a hot water supply gas electromagnetic valve 26.
[0015]
In the remedy apparatus 2, 27 is a remedy path provided downstream from the hot water sensor 20 from the hot water supply path 7 and communicated with the bathtub 3, and 28 is provided in the remedy path 27 and is branched from the hot water supply path 7. A pump 29 for sucking hot water from the side and discharging the hot water to the bathtub 3 side is provided in the memorial passage 27 downstream from the pump 28 and is heated by the bath burner 30 to raise the temperature of the hot water flowing through the memorial passage 27. A bath heat exchanger (remembrance heat exchanger) 31 is a bath gas supply path through which gas to the bath burner 30 is supplied.
[0016]
The remedy path 27 is provided with a bath water flow switch 32 for detecting the flow of hot water pumped up from the bathtub 3 to the remedy path 27 by the pump 28 and a bath temperature sensor 33 for detecting the temperature of the hot water. The bath heat exchanger 29 includes a bath ignition plug 34 that is applied with a high voltage via the igniter 12 to ignite the bath burner 30, a bath fan 35 that supplies combustion air to the bath burner 30, and a bath burner A bath frame rod 36 for detecting 30 combustion states is provided. The bath gas supply path 31 is provided with a bath gas proportional valve 37 for adjusting the gas supply amount to the bath burner 30 and a bath gas electromagnetic valve 38. The hot water supply gas supply passage 9 and the bath gas supply passage 31 are upstream of one gas supply passage, and a gas source solenoid valve 39 is provided in the one gas supply passage.
[0017]
The operation of the hot water supply device with the above-described configuration will be described. When hot water is supplied to the bathtub 3, the hot water solenoid valve 18 is opened and water is supplied to the water supply channel 4. When the water amount sensor 10 detects the water flow, the gas source solenoid valve 39, the hot water supply gas proportional valve 25, and the hot water supply gas electromagnetic valve 26 are opened, the hot water supply burner 6 is ignited by the hot water supply spark plug 13, and burned by the hot water supply fan 14. The working air is sent to the combustion state.
[0018]
A controller (not shown) adjusts the opening degree of the bypass passage 8 and the opening degree of the hot water supply gas supply passage 9 by the bypass solenoid valve 24 and the hot water supply gas proportional valve 25 based on the output of the hot water supply temperature sensor 17. Accordingly, hot water having a predetermined hot water supply temperature is supplied to the bathtub 3 through the hot water supply passage 7. During the hot water filling, the pump 28 is operated, and a part of the hot water flowing through the hot water supply passage 7 is divided into the memorial passage 27 and reaches the bathtub 3. At this time, the bath heat exchanger 29 is not operated. The controller accumulates the amount of hot water supplied to the bathtub 3 based on the output of the hot water sensor 20, and when this amount of hot water reaches a predetermined amount, the gas source solenoid valve 39, the hot water gas proportional valve 25, and the hot water gas solenoid valve 26. And the combustion of the hot water supply burner 6 is stopped, the hot water supply electromagnetic valve 18 is closed, and the hot water filling is finished. When the user opens the hot-water tap 22, shower-like hot water is supplied through the shower hot-water supply path 16 and the shower head 23.
[0019]
When performing the remnant, the controller activates the pump 28 to pump the hot water in the bathtub 3 from the downstream side of the hot water supply path 7 to the retreat path 27 and send it to the bath heat exchanger 29. When the bath water flow switch 32 detects the water flow in the memorial passage 27, the original solenoid valve 39, the bath gas solenoid valve 38, and the bath gas proportional valve 37 are opened, and the bath burner 30 is ignited by the bath spark plug 34. Combustion air is sent to the bath fan 35 and a combustion state is established. Based on the output of the bath temperature sensor 33, the controller adjusts the opening of the bath gas supply passage 31 by the bath gas proportional valve 37, and hot water having a predetermined memorial temperature is supplied from the memorial passage 27 to the bathtub 3 and is memorized. Is done. When a certain time has elapsed from the start of the memorial service, the original solenoid valve 39, the bath gas solenoid valve 38, and the bath gas proportional valve 37 are closed, the bath fan 35 is stopped, and the combustion of the bath burner 30 is stopped. 28 is also stopped and the memorial is finished.
[0020]
The branch position of the memorial passage 27 from the hot water supply passage 7 is on the suction side of the pump 28. For this reason, when the pump 28 is operated, excessive water pressure is not applied to the check valve 19, and the backflow of hot water toward the upstream side of the hot water supply passage 7 can be reliably prevented. In addition, when the pump 28 is operated when the hot water is filled, hot water flows not only in the hot water supply path 7 but also in the memorial path 27. Therefore, the pump 28 can be operated normally at the time of remembrance.
[0021]
When draining the hot water supply path 7, the drain 28 is opened, the hot water solenoid valve 18 is opened, and the pump 28 is operated with the hot water tap 22 of the shower hot water path 16 closed. Thereby, the water remaining in the hot water supply path 7 without being naturally discharged from the drain outlet 21 can be forcedly discharged to the bathtub 3.
[Brief description of the drawings]
FIG. 1 is an explanatory configuration diagram of a hot water supply apparatus with a remedy according to the present invention. FIG. 2 is an explanatory configuration diagram of a conventional hot water supply apparatus with a remedy.
DESCRIPTION OF SYMBOLS 1 ... Hot water supply apparatus, 2 ... Remembrance apparatus, 3 ... Bathtub, 7 ... Hot water supply path, 27 ... Remembrance path, 28 ... Pump, 29 ... Bath heat exchanger (remembrance heat exchanger)

Claims (2)

A hot water supply device that performs hot water supply; and a remedy device that performs warming by heating the hot water supplied from the hot water supply device and stored in the tub. A hot water supply path, a tracking path branched from the hot water supply path and connected to the bathtub, a tracking heat exchanger provided in the tracking path, and a tracking path upstream of the tracking heat exchanger In a hot water supply apparatus with a remedy having a pump that is provided in a path and sends a hot water of the tub toward the remedy heat exchanger at the time of remedy,
The hot water supply path includes a drain port provided upstream from a branch point with the tracking path, an openable / closable hot water solenoid valve provided downstream from the drain port and upstream from the branch point, and the drain port. A check valve provided downstream of the branch point and upstream of the hot water supply path to prevent the backflow of hot water,
When draining the hot water supply passage, the hot water solenoid valve is opened with the drain opening opened, and the pump is operated to discharge hot water from the hot water supply passage to the bathtub. Water heater with remembrance.   The hot water supply device with a supplementary device according to claim 1, wherein the pump is operated during hot water supply from the hot water supply device to the bathtub.

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