JPH0534006A - Water heater with additional heating function - Google Patents

Abstract

(57) [Summary] [Purpose] A hot water heater with a heating function that controls the combustion amount with a common proportional valve for the heating operation and the hot water supply operation, even if the heating operation and the hot water supply operation are performed at the same time. The hot water temperature of the bathtub by heating
Raise the desired temperature. [Structure] Microcomputer 602 of controller 600
When the reheating switch 603 of the controller 601 is turned on, the combustion amount of the gas combusted in the reheating burner 205 is integrated every predetermined time, and the reheating operation is performed until the integrated value reaches a constant value. It is equipped with a burning operation function 605.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater with a reheating function in which fuel is supplied to a hot water supply burner and a reheating burner by a common proportional valve, and more particularly to control of a reheating operation. is there.

[0002]

2. Description of the Related Art An additional heating switch is provided in order to raise the temperature of hot water in a bathtub to a temperature slightly higher than that of the present time. By operating the additional heating switch, an additional heating operation is performed for a predetermined time at a constant combustion amount. There is something.

[0003]

SUMMARY OF THE INVENTION However, a proportional valve for adjusting the amount of fuel supplied to an additional burning burner performing additional heating operation is
In a water heater with a reheating function that is common with a proportional valve that adjusts the amount of fuel supplied to the hot water supply burner that performs hot water supply operation, when the reheating operation and the hot water supply operation are performed at the same time, the opening of the proportional valve increases Since the control is performed based on the operation, for example, when the amount of combustion of the hot water supply burner is small, there is a problem that the hot water temperature in the bathtub does not rise so much even after a predetermined time has elapsed. Specifically, in the case where the additional heating operation is continuously performed, a predetermined combustion amount is obtained when the operation is performed for a predetermined time, but when the simultaneous operation is performed,
Since the opening of the proportional valve is controlled based on the hot water supply operation, the combustion amount on the additional heating side obtained after a predetermined time becomes indefinite, and the hot water temperature of the bathtub does not rise so much in some cases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to adjust the combustion amount of a heating operation and a hot water supply operation by a common proportional valve. An object of the present invention is to provide a water heater with a reheating function that can obtain a desired temperature as a result of increasing the hot water temperature of a bathtub by reheating even if both the operation and the hot water supply operation are performed at the same time.

[0005]

The water heater with a reheating function of the present invention employs the following technical means. The outline of the present invention is shown in the block diagram of FIG. Water heater with additional heating function 1
Is provided in the hot water supply burner 2, the additional heating burner 3, and the fuel supply path 4 for supplying fuel to the hot water supply burner 2 and the additional heating burner 3, and supplies fuel depending on the amount of electricity to the hot water supply burner 2. And one proportional valve 5 for supplying to the additional heating burner 3, and a hot water supply on-off valve 6 provided between the proportional valve 5 and the hot water supply burner 2 for intermittently supplying fuel to the hot water supply burner 2. , An additional heating on-off valve 7 provided between the proportional valve 5 and the additional heating burner 3 for intermittently supplying fuel to the additional heating burner 3, and heat generated by the hot water supply burner 2 and a water supply port. A hot water supply heat exchanger 8 for exchanging heat with the water supplied from the hot water outlet and flowing out from the hot water outlet, and a heat exchanger for exchanging heat between the heat generated in the additional heating burner 3 and the hot and cold water of the bathtub supplied from the bath and flowing out to the bath again. The heat exchanger 9, the proportional valve 5, the hot water supply on-off valve 6, the additional valve Off valve 7 energization control to, and a control device 10 for hot water and Tsui焚. Then, the control device 10 burns in the additional heating burner 3 every predetermined time when additional heating conditions are satisfied such that the water temperature of the bathtub drops below a predetermined temperature or the user performs an additional heating operation. The burner operation function 11 that integrates the combustion amounts to be performed and performs the burner operation until the integrated value reaches a constant value is provided.

[0006]

With the additional heating function of the control device, the combustion amount burned by the additional burner is integrated every predetermined time, and the additional heating operation is performed until the integrated value reaches a constant value. As a result, even if simultaneous operation is performed, such as starting hot water supply operation and additional heating operation at the same time, starting additional heating operation during hot water supplying operation, or starting hot water supply operation during additional heating only operation ,
Since a predetermined amount of combustion is obtained with the additional heating burner, the hot water in the bathtub rises to a substantially predetermined temperature.

[0007]

As described above, the water heater with a reheating function of the present invention raises the temperature of the hot water in the bathtub to a substantially predetermined temperature even if the reheating operation and the hot water supplying operation are simultaneously performed. be able to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a water heater with a reheating function of the present invention will be described based on an embodiment shown in the drawings. [Structure of Embodiment] FIG. 2 is a schematic view of a water heater with an additional heating function showing an embodiment of the present invention. This water heater with reheating function 10
0 is the combined combustion unit 200, the fuel supply unit 300, the hot water supply pipe 400
It consists of reheating water pipe 500 and controller 600.

The composite combustion section 200 comprises a hot water supply combustion section 201 and a reheating combustion section 202, and the combustion chamber of the hot water supply combustion section 201 and the combustion chamber of the additional heating combustion section 202 are provided independently of each other. .. The hot water supply / burning section 201 has two independent burners (first hot water supply burner).
203, a second hot water supply burner 204), and a large combustion width is realized by switching between single use and double use. Two burners 203 of the hot water supply and combustion section 201,
The additional burner 205 of the additional burner 204 and the additional burner 205 of the additional burner section 202 are supplied with air for combustion from a common blower 206. Also,
The combustion gas generated in the hot water supply combustion section 201 and the additional heating combustion section 202 is discharged from the common exhaust port 207. Near the first hot water supply burner 203 and the additional heating burner 205, sparkers 208 and 209 for igniting gas and frame rods 210 and 211 for detecting flames are attached, respectively.

The fuel supply unit 300 includes a first hot water supply burner 203,
A fuel supply path 301 for supplying gas is provided to the second hot water supply burner 204 and the additional heating burner 205. This fuel supply path 301
The main solenoid valve 302 is installed in the
Is provided. The proportional valve 303 adjusts the amount of gas passing through by changing the opening ratio according to the amount of energization. Downstream of the proportional valve 303, a fuel supply path 301 is branched into three directions, and each is connected so as to supply gas to the first hot water supply burner 203, the second hot water supply burner 204 and the additional heating burner 205. A fuel supply passage 301a connecting the proportional valve 303 and the first hot water supply burner 203 is provided with a first hot water supply on-off valve 304 for connecting and disconnecting the fuel supply to the first hot water supply burner 203. Fuel supply path connecting proportional valve 303 and second hot water burner 204
301b is provided with a second hot water supply on-off valve 305 for connecting and disconnecting the supply of fuel to the second hot water supply burner 204. Proportional valve 303
A fuel supply passage 301c that connects the refueling burner 205 and the refueling burner 205 is provided with a refueling on-off valve 306 that intermittently supplies the fuel to the refueling burner 205.

The hot water supply pipe 400 has a water supply port 401 at one end and is connected to a water supply source. The other end of the hot water supply pipe 400 is a hot water outlet 402, which is connected to a pipe for supplying hot water. Hot water supply piping
In the middle of 400, there is a hot water supply heat exchanger 403 for exchanging heat generated between the first hot water supply burner 203 and the second hot water supply burner 204 with the water supplied from the water supply port 401 and flowing out from the hot water supply port 402. It is provided. The hot water supply pipe 400 is provided with a water governor 404 and a hot water supply / water flow switch 405. Further, on the downstream side thereof, a hot water temperature sensor 406 for detecting the temperature of water (hot water) that has passed through the hot water supply heat exchanger 403.
Is provided. A hot water supply pipe 400 downstream of the hot water temperature sensor 406 has a hot water filling pipe for guiding heated hot water to the bathtub 700.
407 is connected. The water filling pipe 407 has a downstream end partway along the reheating water pipe 500 (a circulation pump 504 described later).
It is connected to the downstream side of) and guides the water (hot water) heated by the hot water supply heat exchanger 403 into the bathtub 700. In addition,
An electromagnetic valve 408 for filling water, a water amount sensor 409 for filling water, a check valve 410, etc. are provided in the middle of the filling pipe 407.

The reheating water pipe 500 is a pipe whose both ends open into the bath 700, and forms a water circulation path for sucking the water in the bath 700 from one end and returning it to the bath 700 again.
In the middle of the heating water pipe 500, a heating heat exchanger 501 for exchanging heat between the heat generated in the heating burner 205 and the water flowing inside the heating heat exchanger 501.
Is provided. On the upstream side of this reheating water pipe 500,
A reheating water flow switch 502, a reheating temperature sensor 503, and a circulation pump 504 are provided.

The control device 600 is provided with a controller 601 operated by the user, and commands such as hot water temperature setting by the controller 601, hot water supply water flow switch 405, additional heating water flow switch 502, hot water temperature sensor 406, additional heating temperature. Sensor
503, based on the signals from the two frame rods 210 and 211 and the water amount sensor 409 for filling water, according to the program of the microcomputer 602 installed in the controller 600, the blower 206, the two sparkers 208 and 209, and the original solenoid valve 302. ,
Proportional valve 303, first hot water supply opening / closing valve 304, second hot water supply opening / closing valve 305
, Additional heating on / off valve 306, hot water solenoid valve 408, circulation pump 504
The energization is controlled to supply hot water, fill water, and reheat. The control of the proportional valve 303 is provided so as to be controlled according to the hot water supply operation when the additional heating instruction by the additional heating switch 603 and the hot water supply operation by the hot water supply water flow switch 405 are performed at the same time.

Next, the additional heating control by the control device 600 will be described. Controller 601, depending on the user,
A firing switch 603 is provided to give a firing instruction. The control device 600, when an additional heating instruction is given by the additional heating switch 603, reboil function 604 that raises the hot water in the bathtub 700 to a set temperature and additional heating operation function 605 that raises the temperature of the hot water from the current state. With. Specifically, when the additional heating switch 603 is turned on, first, the additional heating operation function 605 described later is performed. After that, if the hot water temperature in the bathtub 700 does not reach the predetermined temperature even if the reheating operation function 605 is performed, the reboil function 604 is operated until the hot water temperature in the bathtub 700 reaches the predetermined temperature. As a result, the additional heating switch 603 is turned on.
Then, even when the temperature of the hot water in the bathtub 700 is considerably low, it can be reboiled to a predetermined temperature.

The reheating operation function 605 is a function for making the temperature of the hot water in the bathtub 700 a little higher than the present temperature, and is activated when the reheating switch 603 is turned on. This reheating operation function 605
Is the sum of combustion amounts burned in the additional heating burner 205 at predetermined time intervals, until the integrated value reaches a constant value, that is,
The additional heating operation is performed until the amount of gas supplied to the additional heating burner 205 reaches a predetermined amount (the amount of gas supplied to the additional heating burner 205 when burning by additional heating for a predetermined time in the additional heating operation). is there. Specifically, as shown in FIG. 3, the microcomputer 602 looks at the outputs of the hot water supply water flow switch 405 and the additional heating water flow switch 502, and performs either the additional heating operation alone or the simultaneous operation of the additional heating operation and the hot water supply operation. To judge. Then, in the case of the additional heating operation, a predetermined value is added every predetermined time (for example, 120 kcal per second), and in the case of the simultaneous operation, a value based on the instruction value to the blower 206 or the energization amount of the proportional valve 303 is predetermined. Add every hour (changes according to hot water supply status, for example, every second)
60 to 120 kcal). And the microcomputer 602
Is the predetermined value (reference value, eg 21.600kcal; 120k
cal * 3 minutes * 60 seconds), the additional heating operation is performed, and when the integrated value reaches a predetermined value, the additional heating opening / closing valve 306 is closed and the additional heating operation is stopped.

[Effects of the Embodiment] In this embodiment, as shown by the above-mentioned operation, the hot water supply is performed by the common proportional valve 303 for adjusting the amount of gas supplied to the additional combustion section 202 and the hot water supply combustion section 201. Bowl 10
Even if it is 0, the hot water temperature in the bathtub 700 can be increased by a predetermined temperature range even when the hot water supply operation is performed at the same time as the reheating operation.

[Modification] In the above embodiment, the water heater having the function of filling water by counting the amount of water is shown as an example, but the function of filling water by the output of the water level sensor is shown. The present invention can be applied to all water heaters having a reheating function, such as the present invention being applied to a water heater provided or a water heater having no water filling function. Although gas is shown as an example of fuel, liquid fuel such as kerosene may be used.

[Brief description of drawings]

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

FIG. 2 is a schematic view of a water heater with an additional heating function showing an embodiment of the present invention.

FIG. 3 is a schematic block diagram of an additional heating operation function.

[Explanation of symbols]

 1,100 Hot water heater with additional heating function 2,203,204 Hot water supply burner 3,205 Additional heating burner 4,301 Fuel supply path 5,303 Proportional valve 6,304,305 Hot water supply opening / closing valve 7,306 Additional heating opening / closing valve 8, 403 Hot water supply heat exchanger 9,501 Additional heating heat exchanger 10,600 Control device 11,605 Additional heating operation function

Claims (1)

Claim: What is claimed is: 1. A hot water supply burner, an additional heating burner, a fuel supply path for supplying fuel to the hot water supply burner and the additional heating burner, and supplies fuel according to an amount of electricity supplied. One proportional valve that supplies the hot water supply burner and the additional heating burner; a hot water supply on-off valve that is provided between the proportional valve and the hot water supply burner to intermittently supply fuel to the hot water supply burner; A heating-on / off valve provided between the valve and the additional-heating burner for intermittently supplying the fuel to the additional-heating burner, and heat generated at the hot-water supply burner and supplied from the water supply port and flown out from the hot water outlet. A hot water supply heat exchanger for exchanging heat with water, a heat-up heat exchanger for exchanging heat between the hot water and the water in the bathtub which is supplied from the bath and again flowing out to the bathtub, and the proportional valve, Pass through the hot water supply on-off valve and the additional heating on-off valve. A hot water heater with a heating function that controls and controls the hot water supply and heating, wherein the control device integrates the combustion amount burned in the heating burner every predetermined time, and A water heater with a reheating function, which is provided with a reheating operation function for performing a reheating operation until the integrated value reaches a certain value.