JPH1026411A - Water heater - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a hot water supply device for supplying hot water to a kitchen, a bathtub, or the like, the hot water property at which a predetermined temperature of hot water can be immediately obtained when reused is improved. SOLUTION: By operating a driving means 15 so that a water temperature in a heat exchanger 3 detected by a heat exchange thermistor 14 becomes higher than a temperature corresponding to a temperature set by a user, a water temperature at the time of reuse is reduced. Prevent drop. Therefore, at the time of use, hot water at the temperature set by the user can be obtained immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instant hot water supply apparatus for supplying hot water to a kitchen or a bathtub.

[0002]

2. Description of the Related Art FIG. 10 shows the structure of a gas instantaneous water heater as an example of the prior art. In FIG. 10, the water is a water inlet 1
Heat is absorbed by a heat exchanger 3 serving as a heat exchange device, passed through a water amount detection device 2 and supplied to the outside of the machine through a water supply port 5 through a water amount control valve 4 serving as a water amount adjustment device.

Gas is supplied from a gas inlet 6 and passes through a gas solenoid valve 7 and a gas proportional valve 8 as a heating value control device, and is burned by a burner 9 as a heating device to generate heat. Air required for combustion is supplied by a combustion blower 10 as an air supply device, and combustion exhaust gas generated by combustion is discharged from an exhaust port 11. Further, a control device 12 for controlling each device is electrically connected to each device. Then, a remote controller 1 as a supply hot water temperature setting device for setting the hot water temperature
3 is also electrically connected to the control device 12.

[0004]

In the hot water heater according to the prior art, the heat in the heat exchanger 3 is radiated when the idle time elapses during the supply of hot water and the idle time elapses. It took 5 to 10 seconds to obtain hot water at the set temperature, which was inconvenient to use.

An object of the present invention is to solve the above-mentioned conventional problems and to improve the quick-drying property in which hot water of a temperature set by a user can be obtained immediately when the water heater is reused.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention detects a water temperature in a heat exchanger after the use of a water heater is stopped, and detects a heat exchanger temperature corresponding to a tapping temperature set by a user. In the following cases, the heat generating device is operated in a state where water is not flowing, and the water temperature in the heat exchanger is controlled to be a heat exchanger temperature corresponding to the tapping temperature set by the user.

Thus, when the water heater is reused, the temperature of the hot water is prevented from lowering, and hot water having the temperature set by the user can be immediately obtained.
Immediate hot water is improved, and ease of use is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a heating device for generating heat, a heating value control device for controlling the amount of heat generated by the heating device, and a heat generation device for generating heat. Heat exchange device for supplying water to water, a heat exchanger water temperature detection device for detecting the water temperature in the heat exchange device, a water amount detection device for detecting the flow of water, and a supply water temperature setting device for setting the supply water temperature And a heat generating device driving means for operating the heat generating device based on a signal from the heat exchanger water temperature detecting device and a signal from the water amount detecting device, and heat generated on the supply hot water temperature setting device and operating the heat generating device driving means. A device operating device;
A control device for controlling each of the devices is provided, and when the operating device of the heat generating device is ON, the temperature of the water in the heat exchanger is detected by the heat exchanger water temperature detecting device. When the water temperature in the heat exchanger, which corresponds to the tapping temperature set by the user when the equipment is stopped and is stored in the equipment body in advance, becomes lower than a predetermined temperature, the driving means is operated to operate the water temperature in the heat exchanger. To the heat exchanger temperature stored in the body. As a result, when the equipment is reused, the temperature of the hot water is prevented from lowering, and hot water having the temperature set by the user can be obtained immediately.

According to a second aspect of the present invention, there is provided a heating device for generating heat, a heating value control device for controlling the amount of heat generated by the heating device, and supplying the heat generated by the heating device to water. A heat exchange device, a heat exchanger water temperature detection device for detecting a water temperature in the heat exchange device, a water amount detection device for detecting a flow of water, a supply hot water temperature setting device for setting a supply hot water temperature, and A driving unit for operating the heat generating device with a signal from the heat exchanger water temperature detecting device and a signal from the water amount detecting device; an operating device on the supply hot water temperature setting device for operating the driving unit; A control device for controlling the device, comprising an operation time setting device for setting a time for operating the driving means, and when the operation device is ON when the device is stopped, the heat exchanger water temperature detection device The temperature of the water in the heat exchanger Out to. Then, when the equipment is stopped, if the water temperature in the heat exchanger falls below the temperature stored in advance in the equipment body corresponding to the tapping temperature set by the user, the drive unit is operated to adjust the water temperature in the heat exchanger to Increase the temperature of the main unit memory. This makes it possible to prevent a drop in tap water temperature when the equipment is reused.

[0010] Further, by setting an arbitrary time by the operation time setting device, hot water at a temperature set by the user at the time of reuse can be immediately obtained only when necessary.

According to a third aspect of the present invention, there is provided a heating device for generating heat, a heating value control device for controlling the amount of heat generated by the heating device, and supplying the heat generated by the heating device to water. A heat exchanger for detecting the temperature of water in the heat exchanger, a heat exchanger for detecting the temperature of water in the heat exchanger, a water amount detector for detecting the flow of water, a hot water temperature setting device for setting the temperature of hot water to be supplied, A driving unit for operating the heat generating device with a signal from the exchanger water temperature detecting device and a signal from the water amount detecting device, and an operating device on the supply hot water temperature setting device for operating the driving unit; A control device for controlling;
An operation time setting device for setting a time for operating the driving unit, and an operation start time setting device for setting a time for starting the operation of the driving unit, wherein the operation device is turned on when the device is stopped. In this case, the temperature of the water in the heat exchanger is detected by the heat exchanger water temperature detecting device. When the temperature of the water in the heat exchanger falls below the temperature stored in advance in the equipment main body corresponding to the tap water temperature set by the user when the equipment is stopped, the driving means is operated to set the water temperature in the heat exchanger to the temperature of the main body. Increase to the temperature of memory. Due to this, when reusing equipment,
It is possible to prevent a drop in tapping temperature.

Also, by setting an arbitrary time by the operating time setting device, hot water at a temperature set by the user at the time of reuse can be obtained immediately only when necessary.

[0013] Further, by setting an operation start time setting device for setting a time for operating the driving means, hot water of a predetermined temperature can be obtained immediately from the beginning of use by setting the time at the start of use.

An embodiment of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1 shows a configuration diagram of a gas water heater as an example of the first embodiment of the present invention. In FIG. 1, water is supplied from a water inlet 1 and a water amount sensor 2 as a water amount detecting device.
, Heat is absorbed by a heat exchanger 3 as a heat exchange device, and the hot water is supplied to the outside of the machine from a hot water supply port 5 through a water amount control valve 4. The water temperature in the heat exchanger 3 is detected by a heat exchange thermistor 14 as a heat exchanger water temperature detecting device. That is, the heat exchange thermistor 1
4 is installed near the exit side of the heat exchanger 3 and detects a hot water temperature in or near the exit of the heat exchanger 3 to emit a signal.

The gas is supplied from a gas inlet 6, passes through a gas solenoid valve 7, and is burned by a gas proportional valve 8 serving as a heating value control device 8a by a burner 9 serving as a heating device to generate heat. The air required for combustion is a combustion blower 1 as an air supply device.
The combustion exhaust gas supplied by the combustion chamber 0 and generated by the combustion is discharged from the exhaust port 11. A control device 12 for controlling each of the devices is electrically connected to each device. The control device 12 includes a driving unit 15 for operating and stopping the combustion blower, opening and closing the gas solenoid valve 7, and controlling the gas proportional valve 8. Further, a supply hot water temperature setting device 16 as a remote controller for setting a hot water temperature from the heat exchanger 3.
Are also electrically connected to the control device 12. The supply hot water temperature setting device 16 has a switch 17 as an operating device.

Referring to FIG. 2, the driving means 15 will be described. The driving means 15 includes a heat exchange thermistor 14, an operational amplifier 18, an A / D converter 19, and a microcomputer 20.
(Hereinafter, referred to as a microcomputer).

The microcomputer 20 includes an I / O unit 21 and a CPU unit 2
2, a RAM 23 and a ROM 24.

The water temperature of the heat exchanger is controlled by a microcomputer 20 via a heat exchange thermistor 14, an operational amplifier 18 and an A / D converter 19.
Is read from the I / O unit 21 and stored in the RAM unit 23.

In the ROM section 24 of the microcomputer 20, a judgment value of the water temperature in the heat exchange corresponding to the tapping temperature set by the user in advance is stored.

The CPU 22 compares the heat exchanger water temperature stored in the RAM unit 23 with a judgment value stored in advance.
If the loaded heat exchanger water temperature falls below the judgment value,
The heat generation amount control device 8a is driven to control the water temperature in the heat exchanger to be equal to or higher than a predetermined temperature. The heating value control device 8a includes the gas proportional valve 8, the microcomputer 20, the D / A converter 25, and the transistors 26 and 27.

When the user stops using the instantaneous gas water heater, that is, stops supplying hot water, the burner 9 stops burning. When the combustion stops, the heat exchanger 3 that has absorbed heat starts to release heat, and the water temperature in the heat exchanger falls. Then, when the use is started again, low-temperature hot water flows until combustion starts in the burner 9, and if the hot water temperature in the heat exchanger is too low, hot water lower than the tapping temperature set by the user is supplied.

However, in the present invention, the temperature inside the heat exchanger is set to the heat exchanger temperature corresponding to the temperature set by the user, so that it is possible to prevent a drop in tap water temperature during reuse.
Hot water set by the user can be obtained immediately.

Steps S1 to S8 for the flow of FIG.
(Hereinafter referred to as S1, S2... S8).

If the user is using a gas instantaneous water heater,
When the use is stopped, the device enters a standby state (S
1). In this state, since the apparatus is in the standby state, the water amount detection device 4 sends a signal to the control device 12 when water is not flowing. As for the device, the switch 17 as the operating device is turned on.
It is determined whether it is N (S2). Switch 17 is OFF
In this case, the device holds the operation standby state S1 (S3). When the switch 17 is ON, the equipment detects the water temperature in the heat exchanger by the heat exchange thermistor 14 (S3).
When the water temperature in the heat exchanger detected by the heat exchange thermistor 14 exceeds the judgment value stored in the ROM 24 of the microcomputer 20 in advance, the state of step S3 is maintained. But,
When the value falls below the above judgment value, the driving means 15 of the heating device is set to "O".
N "(S4) to burn the burner (S5). Then, the heat exchange water temperature is detected by the heat exchange thermistor 14 and the ROM 2
If the heat exchanger water temperature is lower than the judgment value stored in No. 4, the combustion is continued (S6). Heat exchange thermistor 14
The heat exchange water temperature is detected, and when the water temperature of the heat exchanger becomes higher than the judgment value stored in the ROM 24, the combustion of the burner is stopped (S7), and the driving means of the heating device is turned off (S8). ). Then, the process returns to the state of step S3 and waits. When the hot water falls again below the set hot water temperature of the user, step S3 is performed.
Through S8, the hot water temperature of the heat exchanger 3 is always kept at the set value to prepare for reuse.

By performing such an operation, the water temperature in the heat exchanger can be prevented from lowering, and hot water having the temperature set by the user can be immediately obtained.

(Embodiment 2) FIG. 4 is a block diagram of an instantaneous gas water heater as an example of Embodiment 2 of the present invention.

In FIG. 4, water is supplied from a water inlet 1, passes through a water amount sensor 2 as a water amount detecting device, absorbs heat in a heat exchanger 3 as a heat exchange device, passes through a water amount control valve 4, and is out of the hot water inlet 5. Hot water. The water temperature in the heat exchanger 3 is provided near the outlet side of the heat exchanger 3, detected by a heat exchange thermistor 14 as a heat exchanger water temperature detecting device, and transmitted as a signal.

The gas is supplied from a gas inlet 6, passes through a gas solenoid valve 7, and passes through a gas proportional valve 8 as a heating value control device.
The fuel is burned by a burner 9 as a heating device to generate heat. The air required for combustion is a combustion blower 10 as an air supply device.
The combustion exhaust gas generated by the combustion is discharged from the exhaust port 11.

A control device 12 for controlling the above devices is electrically connected to each device. And the control device 12
Includes a driving means 15 for operating and stopping the combustion blower 10, opening and closing the gas solenoid valve 7, and controlling the gas proportional valve 8. The supply water temperature setting device 16 is also a control device 12
Is electrically connected to Further, the supply hot water temperature setting device 16 as a remote controller for setting the temperature of hot water from the heat exchanger 3 has a switch 17 as an operating device, and an operation time setting device 28 is also provided in the supply hot water temperature setting device 16. ing. The operation and configuration other than the operation time setting device 28 are the same as those of the first embodiment described with reference to FIGS. 1 to 3, and therefore the description will be made with reference to FIG.

The operation time setting device 28 is a timer for setting the combustion time of the burner 9 so that the supply of hot water is temporarily stopped and hot water of the set hot water temperature is immediately obtained when the hot water is reused. The variable resistor 29, the operational amplifier 30, and the A / D converter 3
1 and a microcomputer 20. The set operation time is read from the I / O unit 21 of the microcomputer 20 via the variable resistor 29, the operational amplifier 30, and the A / D converter 31, and is read from the RAM unit 2.
3 is stored.

The operation time is stored in the ROM 24 of the microcomputer 24 in advance. The data read from the I / O unit 21 of the microcomputer 20 and stored in the RAM unit 23 and the RO
The data previously stored in the M unit 24 is compared, and the closest one is stored in the RAM unit 23 again as the set time.

When the switch 17 is turned on, the time stored in the RAM unit 23 is counted by the microcomputer 20 CPU 22. When the stored time elapses, the driving means 1 of the burner 9 is driven.
5 stops working.

The operation flow of FIG. 6 will be described. Steps S1 to S8 are the same as the flow described with reference to FIG. 3, and thus the description thereof will be omitted, and the description will focus on the timer setting operation. The apparatus is brought into an operable state (S9), and the operation time is set by the operation time setting device 28 which sets the time for securing the quick-hot water performance (S10). From now on, the following operation is the same as that of FIG. 3, but it is checked whether the set timer has expired during the sequence (S11). If the timer has expired (S12)
The device shifts to the standby state. If the timer has not expired (S13), the sequence is continued. That is, in step S3, the burner 9 burns when the water temperature of the heat exchanger 3 is lower than or equal to a predetermined value (lower than the set temperature) (S5).
The heat exchanger 3 is heated. Then, in step S6, the sequence is divided when the water temperature of the heat exchanger 3 is equal to or lower than a predetermined value and when not. In other words, if the value is equal to or less than the predetermined value and the set time of the timer remains in step 11, the process returns to step S5. If the set time of the timer has ended, the process returns to step S1. If the water temperature of the heat exchanger 3 reaches a predetermined value in step S6, steps S7, S
After 8 and when the set time of the timer is not completed (S13) in step 11, the process returns to step S3, and when the set time of the timer is completed (S12), the process returns to step S1. By performing such an operation, it is operated so that hot water at a set temperature can be supplied immediately only when the user needs it (referred to as quick hot water property) to prevent the water temperature in the heat exchanger from dropping and adjust the tap water temperature set by the user. It can be obtained immediately, and energy can be saved by operating only when necessary.

(Embodiment 3) FIG. 7 is a block diagram of an instantaneous gas water heater according to Embodiment 3 of the present invention.

In FIG. 7, water is supplied from a water inlet 1, passes through a water amount sensor 2 as a water amount detecting device, absorbs heat in a heat exchanger 3 as a heat exchange device, passes through a water amount control valve 4, and is supplied with a hot water inlet 5. Hot water is supplied outside the machine. The water temperature in the heat exchanger is
It is detected by a heat exchange thermistor 14 as a heat exchanger water temperature detecting device.

The gas is supplied from a gas inlet 6 and burns by a gas solenoid valve 7 and a burner 9 as a heating device through a gas proportional valve 8 as a heating value control device to generate heat. Air required for combustion is supplied by a combustion blower 10 as an air supply device.
It is discharged from 1. A control device 12 for controlling each of the devices is electrically connected to each device. The control device 12 includes a driving unit 15 for operating and stopping the combustion blower 10, opening and closing the gas solenoid valve 7, and controlling the gas proportional valve 8.
It is included. Further, a supply hot water temperature setting device 16 as a remote controller for setting a hot water temperature from the heat exchanger 3 is also electrically connected to the control device 12. The supply hot water temperature setting device 16 has a switch 17 as a heating device operating device, and the operation time setting device 28 described in the second embodiment is also provided in the supply hot water temperature setting device 16. Further, the operation start time setting device 32 is also a supply hot water temperature setting device 1.
6. The operation and operation other than the operation start time setting device 32 are the same as those of the first and second embodiments described with reference to FIGS.
FIG. 8 will be mainly described.

The operation start time setting device 32 includes a digital switch 33, a communication microcomputer 34, and the microcomputer 20. The operation start time is read by the digital switch 33 and the communication microcomputer 34 from the I / O unit 21 of the microcomputer 20 and stored in the RAM unit 23. When the time stored in the RAM unit 23 by the internal timer of the microcomputer 20 is reached, the driving means 15 starts operating, and operates so that hot water at the temperature set by the user is immediately obtained.

FIG. 9 shows the above operation flow. Steps S1 to S13 are the same as the operation flow described with reference to FIGS. 3 and 6, and thus description thereof will be omitted, and the operation for setting the operation start time will be described. The apparatus is brought into an operable state (S1), and the operation time is set by the operation time setting device 32 for setting the time for securing the quick hot water performance (S14). Then, the time for starting the operation of the quick hot water is set (S15). ).

It is determined whether or not the set time has been reached (S17). If the set time has been reached, the process proceeds to step S3, and the device operates according to the flow of FIG.

By performing such an operation, when the user wants to use the hot water, the hot water having the tap water temperature set by the user can be obtained immediately, and unnecessary energy need not be used.

[0041]

As is apparent from the above description, according to the hot water supply apparatus of the present invention, the temperature in the heat exchanger is maintained at the heat exchanger temperature corresponding to the tapping temperature set by the user. In this way, it is possible to prevent a drop in tapping temperature at the time of tapping again, and to immediately obtain hot water having a temperature set by the user.

In addition, the hot water supply device according to the second aspect of the present invention has a timer function, so that the hot water supply temperature can be instantaneously output only when necessary, thereby saving energy and enabling instant hot water supply.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a first embodiment of a hot water supply apparatus of the present invention.

FIG. 2 is a block diagram showing a main part of the apparatus.

FIG. 3 is a flowchart showing the operation of the apparatus.

FIG. 4 is a schematic view showing Embodiment 2 of the hot water supply apparatus of the present invention.

FIG. 5 is a block diagram showing a main part of the apparatus.

FIG. 6 is a flowchart showing the operation of the apparatus.

FIG. 7 is a schematic view showing a third embodiment of the hot water supply apparatus of the present invention.

FIG. 8 is a block diagram showing a main part of the apparatus.

FIG. 9 is a flowchart showing the operation of the apparatus.

FIG. 10 is a schematic diagram of a conventional example.

[Explanation of symbols]

 2 Water volume sensor 14 Heat exchange thermistor 15 Driving means 16 Supply hot water temperature setting device 17 Switch 20 Microcomputer 28 Operating time setting device 32 Operation starting time setting device

Continued on the front page (72) Inventor Masahiko Yamamoto 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] A heat generating device for generating heat; a heat generating amount control device for controlling an amount of heat generated by the heat generating device; a heat exchanging device for supplying heat generated by the heat generating device to water; A heat exchanger water temperature detection device for detecting the temperature of the water inside, a water amount detection device for detecting the flow of water, a supply hot water temperature setting device for setting the supply hot water temperature, and a signal from the heat exchanger water temperature detection device. A driving unit for operating the heating device by a signal from the water amount detection device; an operating device for operating the driving unit for the heating device; and a control device for controlling each of the devices, wherein the control device operates the operation device. A water heater for operating the heating device driving means while the water amount detection device is outputting a signal indicating that water is not flowing; 2. A heat generating device for generating heat, a heat control device for controlling the amount of heat generated by the heat generating device, a heat exchanging device for supplying heat generated by the heat generating device to water, A heat exchanger water temperature detection device for detecting a water temperature in the device,
A water amount detection device for detecting the flow of water, a supply water temperature setting device for setting a supply hot water temperature, and the heating device is operated by a signal from the heat exchanger water temperature detection device and a signal from the water amount detection device. A driving unit, an operating device for operating the driving unit, and controlling the respective devices, and operating the driving unit while the operating device is operating and the water amount detecting device is outputting a signal indicating that water is not flowing. A hot water supply device comprising: a control device that controls the operation of the driving unit; and an operation time setting device that sets a time period during which the driving unit is operated. 3. A heat generating device for generating heat, a heat control device for controlling the amount of heat generated by the heat generating device, a heat exchanging device for supplying heat generated by the heat generating device to water, and a heat exchanging device. A heat exchanger water temperature detecting device for detecting the water temperature of the water, a water amount detecting device for detecting the flow of water, a supply hot water temperature setting device for setting a hot water temperature to be supplied, a signal from the heat exchanger water temperature detecting device, A driving unit for operating the heat generating device by a signal from the water amount detecting device, an operating device for operating the driving unit, controlling each of the devices, and while the operating device is operating, the water amount detecting device causes the water flow to flow. A control device that operates the driving unit while outputting a signal that is not being output, an operation time setting device that sets a time during which the driving unit is operated, and an operation start time that sets a time at which the driving unit is started operating Setting device Example was a water heater.