JP2003106647A - Hot water storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage type oil water heater that prevents high temperature water from being discharged into a bathtub during a pump circulation for temperature determination of bathtub water and the like, in the light of the risk in a conventional hot water storage type water heater in which high temperature water in circulating piping heated by high temperature water in a hot water storage tank will flow into a bathtub during a pump circulation for temperature determination of bathtub water and the like. SOLUTION: The hot water storage type oil water heater comprises a burning vessel with a hot water storage tank, a burning means for heating hot water in the hot water storage tank, a circulating pump for circulating water in the bathtub, and a controlling means for prohibiting the operation of the burning means for a given time when the circulating pump is actuated.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion can body provided with a hot water tank, a combustion means for heating hot water in the hot water tank, and water in a bathtub. The present invention relates to a hot water supply type water heater provided with a circulation pump for circulating water. 2. Description of the Related Art Conventionally, in a hot water storage type water heater, if the temperature of the hot water in the hot water tank drops even during the circulation of the pump for checking the temperature of the bath water, the hot water in the hot water tank is heated by the control means. Was. [0003] However, in the hot water storage type water heater as described above, the circulation pipe heated by the high-temperature hot water in the hot water tank during circulation of the pump for checking the temperature of the bath water. There is a risk that high-temperature hot water inside the bath may enter the bathtub. Therefore, an object of the present invention is to provide a hot water supply type hot water supply apparatus which prevents hot water from being discharged into a bathtub during circulation of a pump for checking the temperature of bathtub water. In order to achieve the above object, a first aspect of the present invention is to provide a combustion can body having a hot water storage tank and a heating can body for heating hot water in the hot water storage tank. Combustion means, in a hot water supply type water heater provided with a circulation pump for circulating water in the bathtub, the control means for inhibiting the operation of the combustion means for a predetermined time after the circulation pump starts operating; Therefore, even if the circulation pump operates to check the temperature of the bathtub water, hot water does not flow into the bathtub. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram of a hot water storage type petroleum water heater according to one embodiment of the present invention. [0006] As shown in the figure, a hot water storage type oil water heater has a water supply pipe 10 for supplying water from a combustion can 1 and a water supply source (not shown) to a hot water storage tank 2 provided in the combustion can 1. And a hot water supply pipe 19 for supplying hot water in the hot water storage tank 2 heated by the burner 13 to a hot water tap (not shown). The hot water storage tank 2 is provided with a hot water storage temperature sensor 9 for detecting the temperature of hot water in the hot water storage tank 2. Furthermore, a bypass pipe 17 branched from the water supply pipe 10 and connected to the tapping pipe 19 without passing through the hot water storage tank 2, the bypass pipe 17 and the tapping pipe 1.
9, the hot water in the hot water tank 2 and the bypass pipe 17
Is provided with a mixing valve 18 for controlling the mixing of the water sent from the unit by a stepping motor M. A water inlet temperature sensor 14 for detecting a temperature Tc of water from a water supply source and a water amount Q
The water supply sensor 8 for detecting the temperature and the hot water supply pipe 19 upstream of the mixing valve 18 are provided with a hot water tank outlet temperature sensor 15 for detecting the outlet temperature Th of the hot water tank 2 and the hot water supply pipe 11 downstream of the mixing valve 18. Is provided with a mixed hot water temperature detection sensor 16 for detecting the mixed hot water temperature Tm after mixing. The mixing valve 18 is also provided with a water amount adjusting function for reducing the amount of water when the required heat amount exceeds the maximum capacity of the device. The burner 13 includes a fan 3 for supplying air necessary for combustion, a nozzle 5 for supplying kerosene to form a flame, a spark plug 6 for ignition,
It is composed of CdS7 for detecting the presence or absence of a flame. Further, a kerosene supply pipe 12 for supplying kerosene to the nozzle 5 provided on the burner 13 is provided, and the kerosene supply pipe 12 is provided with an electromagnetic pump 4 for pumping kerosene to the nozzle 5. A bath heat exchanger 20 is provided in the hot water storage tank 2, and is connected to a circulation adapter 25 provided in a bathtub 26 via a circulation pipe 24. Further, a circulation pump 21 for stirring the hot water in the bathtub 26 and a bath temperature sensor 2 for detecting the temperature of the hot water are provided in the circulation pipe 24.
2. Bath water flow switch 23 for detecting the presence or absence of hot water
Is provided. The hot water type oil hot water supply apparatus further includes detection signals (T) from the sensors 14, 8, 15, 16, 9, and 22.
c, Q, Th, Tm, Tk, Thr) and set temperature signals (Ts, T) from hot water supply temperature setting switches and bath temperature setting switches provided on a remote controller (not shown).
sh), a control unit (not shown) for controlling the electromagnetic pump 4, the circulation pump 21, the burner 13, the mixing valve 18, and the like is also provided. A hot water supply operation and a bath reheating operation based on the above configuration will be described. Now, in a state where the operation switch of the hot water type oil hot water heater is turned on by a remote controller (not shown), the hot water is stored at a predetermined high temperature (for example, 80 ° C.) even when hot water is not actually used by a faucet or the like. In order to keep the temperature of the hot water in the tank 2, the burner 13 repeats on and off at the maximum combustion capacity. Then, when the use of hot water is actually started, the water from the water supply source comes out of the hot water tank 2 through a route of the water supply pipe 10, the water amount sensor 8, the hot water tank 2, and the hot water pipe 19. The control unit (not shown) includes a water inlet temperature Tc detected by the water inlet temperature sensor 14 of the water supply pipe 10, a water inlet flow rate Q detected by the water amount sensor 8, and a water outlet temperature detected by the hot water tank outlet temperature sensor 15 of the hot water pipe 19. The mixing ratio between the water flowing through the bypass pipe 17 and the hot water flowing through the tapping pipe 19 is determined based on Th and the set hot water supply temperature Ts set by the user using the remote controller, so that the hot water after mixing the hot water becomes the set hot water supply temperature Ts. And outputs a control signal to the mixing valve 18 so that the calculated mixing ratio is obtained. Thus, the hot water from the tapping pipe 19 and the water from the bypass pipe 17 are mixed at an appropriate mixing ratio, and become hot water at the set hot water supply temperature Ts set by the remote controller.
It flows to the hot water supply pipe 11. During this time, the burner 13 is
The combustion operation for maintaining the hot water in the inside at a predetermined high temperature (for example, 80 ° C.) is performed. Although the mixing valve 18 is provided at the connecting portion between the tapping pipe 19 and the bypass pipe 17 here, the bypass pipe 17 may be provided with a flow control valve for adjusting the amount of water. The reheating operation of the bath is performed by the circulation pump 21.
Is operated, the hot water in the bathtub 26 is indirectly heated by the hot water in the hot water storage tank 2 via the bath heat exchanger 20, and the bathtub 26 is heated to a bath set temperature Tsh set by a remote controller (not shown). The hot water inside can be boiled. At this time, first, the circulation pump 21 is operated, and the presence or absence of hot water in the bathtub 26 is checked by the bath water flow switch 23.
Then, when it is determined that there is hot water, the bath temperature sensor 22 performs an operation of detecting the temperature Thr of the hot water in the bathtub 26. At this time, if the temperature Thr of the hot water in the bathtub 26 is lower than the bath set temperature Tsh, the operation of the circulation pump 21 is continued to perform the reheating operation. During this time, the burner 13 performs a combustion operation for maintaining the hot water in the hot water storage tank 2 at a predetermined high temperature (for example, 80 ° C.). Therefore, even when the circulation pump operation is being performed to check the temperature of the bathtub water, etc.,
Because the temperature of the hot water inside is still high (for example, 80 ° C),
When the circulation pump 21 operates, hot water may flow out of the bathtub 26. Next, the operation of the embodiment of the present invention will be described with reference to FIG. First, it is determined in step S1 whether the circulation pump 21 is operating. If it is operating, it is determined in step S3 whether reheating is being performed. Next, step S
If it is determined in step S3 that reheating is in progress, the hot water in the hot water storage tank 2 is heated by the burner 13 in step S2, and
The temperature of the warm water in the inside is set to a predetermined high temperature (for example, 80 ° C.). If it is determined in step S3 that reheating is not being performed, the temperature of the hot water in the hot water storage tank 2 is kept at an appropriate temperature in step S4. By setting the appropriate temperature, combustion can be prohibited for the time being, and when the pump circulation without reheating is performed for a long time, it is possible to prevent cold hot water from flowing into the bathtub. If the circulation pump 21 is not operating in step S1, the hot water in the hot water storage tank 2 is heated by the burner 13 in step S2 to raise the temperature of the hot water in the hot water storage tank 2 to a predetermined high temperature (for example, 80 ° C.). And
Therefore, during the operation of the circulation pump 21 without additional heating (during a predetermined time for checking the temperature of the bathtub water, etc.), the temperature of the hot water in the hot water storage tank 2 is kept at an appropriate temperature, so that the circulation pump 21 operates. Even when hot water does not flow into the bathtub.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a hot water storage type oil water heater according to an embodiment of the present invention. FIG. 2 is a flowchart diagram showing an operation according to an embodiment of the present invention. .. Combustion can 2 Hot water tank 3 Fan 4 Electromagnetic pump 5 Nozzle 6 Spark plug 7 CdS 8 Water quantity sensor 9 Hot water storage temperature sensor 10 Water supply pipe 11 Hot water supply pipe 12 Kerosene supply pipe 13 Burner 14 ... incoming water temperature sensor 15 ... hot water tank outlet temperature sensor 16 ... mixed hot water temperature detection sensor 17 ... bypass pipe 18 ... mixing valve 19 ... hot water pipe 20 ... bath heat exchanger 21 ... circulation pump 22 ... bath temperature sensor 23 ... bath water flow Switch 24: Circulation pipe 25: Circulation adapter 26: Bathtub

Claims (1)

Claims: 1. A hot water storage type having a combustion can body provided with a hot water storage tank, combustion means for heating hot water in the hot water storage tank, and a circulation pump for circulating water in the bathtub. In the hot water heater, there is provided a control means for prohibiting the operation of the combustion means for a predetermined time after the circulation pump starts operating.