JPH0536243U - Water heater - Google Patents

Abstract

(57) [Summary] [Purpose] When using hot water from the hot water supply channel when hot water is supplied to the bathtub from a hot water supply machine that branches from the hot water supply channel and has a pouring water channel to the bathtub (EN) Provided is a water heater having a structure that can flow to the hot water supply side as it is, and can prevent burns especially during a shower. [Structure] An on-off valve 7 is provided in the hot water supply water passage 6 downstream of the heat exchanger 3. On the other hand, a bathtub 24 that branches off from the hot water supply channel 6
The pouring water passage 8 is provided with a pouring control valve 9 on the way. Also,
Open / close valve 7 for water supply channel 2 and hot water supply channel 6 on the upstream side of heat exchanger 3
Is connected to the downstream side of the waterway by a bypass waterway 13.
An electromagnetic valve 14 for opening and closing and a water flow detection device 15 are provided in the middle of 3. In the above configuration, the on-off valve 7
The solenoid valve 14 is open, but when the shower plug 21 is opened in this state, the water flow detection device 15 detects the water flow and stops the high-temperature hot water operation, and then the open / close valve 7 is opened. Then, hot water of an appropriate temperature is discharged from the shower plug 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a so-called hot water heater with a high-temperature hot-water supply function that enables high-temperature hot water to be poured through the upper machine hot water pouring water path when the temperature of the hot water bath has dropped to the hot water pouring water path branching from the hot water supply water path. Related to the improvement of.

[0002]

[Prior Art]

 An example of a conventional water heater with high-temperature hot water will be described with reference to the system diagrams of FIGS. 2 and 3. In the water heater 1a shown in FIG. 2, reference numeral 3 is a heat exchanger, and a pouring water connected to the water supply passage 2 upstream of the heat exchanger 3, the hot water supply passage 6a branched to the downstream side of the heat exchanger 3 and the bathtub 24. It has a waterway 8. The hot water supply passage 6a is provided with a water flow switch 30 as a water flow detecting device on the way, and a shower plug 21 and a hot water supply plug 22 at the tip. Reference numeral 19 is a burner, 9 is a pouring control valve, and 27a is a controller for controlling the operation of the water heater 1a. As described above, this type of water heater shares a hot water supply function such as a shower and a hot water supply function with a single heat exchanger, so it has a relatively simple structure and can be manufactured in a compact and inexpensive manner. it can.

Next, the hot water supply device 1b shown in FIG. 3 has an electromagnetic valve between the downstream side of the check valve 31 provided in the hot water supply passage 6b and the upstream water supply passage 2 of the heat exchanger 3. A bypass water channel 13a having a valve 14 and a water flow detection device 15 is provided. The rest of the configuration is the same as that of the water heater 1a shown in FIG.

[0004]

[Problems to be solved by the device]

 In the case of the water heaters 1a and 1b having the structure shown in FIG. 2, when hot water is being supplied to the bathtub 24, for example, if the shower 21 at the tip of the hot water supply channel is opened, hot water may come out of the shower 21. Therefore, in the case of the water heater 1a, the water flow switch 30 provided in the hot water supply channel 6a is used. In the case of the water heater 1b of FIG. 3, the water flow detection device 15 provided in the bypass water channel 13a is used. By detecting the water flow, the hot water was stopped and the shower temperature was switched to the proper temperature.

However, when the water supply pressure is low, the amount of water supplied decreases, and the water flow cannot be detected at a flow rate below the detection sensitivity of the water flow switch 30 or the water flow detection device 15. The same is true when the water flow switch 30 and the water flow detection device 15 are out of order, and there is a risk of hot water coming out of the shower 21 and causing burns.

The present invention has been made in view of the above-mentioned problems, and even when the flow rate that cannot be detected by the water flow detection device is small, or when the water flow detection device fails, high-temperature hot water is showered. The object is to provide a hot water supply device capable of preventing burns that does not flow to the inside.

[0007]

[Means for Solving the Problems]

 The present invention relates to a hot water supply channel (6) downstream of a heat exchanger, and a pouring water channel (6) provided with a pouring control valve (9) branching from the water channel (6) to a bathtub (24). 8), a hot water supply device (1) is provided with an opening / closing valve (7) in the middle of the hot water supply water passage (6), and the water supply water passage (2) and the hot water supply water passage upstream of the heat exchanger (3) A bypass water channel (13) was connected to the downstream side of the on-off valve (7) in (6), and a water flow detection device (15) and water amount control means (14) were provided in the middle of the water channel (13). It is a thing. An electromagnetic valve for opening and closing, a flow control valve, or the like is used as the water amount control means in the present invention.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIG. In FIG. 1, 1 is a water heater, and 2 is a water supply passage provided with a water supply plug 28 connected to the upstream side of the heat exchanger 3 and a water amount sensor 4. Reference numeral 5 denotes a thermistor for detecting hot water temperature provided on the outlet side of the heat exchanger 3. Reference numeral 6 denotes a hot water supply water passage on the downstream side of the heat exchanger 3, and an opening / closing valve 7 for opening and closing the water passage is provided on the way. Reference numeral 8 denotes a pouring water channel branched from the hot water supply channel 6 and connected to the bathtub 24. A pouring control valve 9 for opening and closing the channel and adjusting the opening of the channel, and check valves 10 and 11, An atmosphere release valve 12 is provided which is closed when water is flowing and opened when water is stopped. Reference numeral 13 denotes a bypass water channel, which is connected to the water supply channel 2 and the hot water supply channel 6 on the downstream side of the on-off valve 7, and an electromagnetic valve 14 for opening and closing the bypass water channel 13 and a water flow detection device 15 are provided on the way. Instead of the solenoid valve 14, a flow control valve capable of opening / closing the water channel and adjusting the amount of water may be used. Reference numeral 16 denotes a gas passage connected to the burner 19, which has a gas plug 29, gas solenoid valves 17a and 17b, and a gas proportional valve 18. 20 is a fan for combustion. Reference numeral 27 denotes a controller, which electrically connects the water amount sensor 4, the thermistor 5, the opening / closing valve 7, the pouring control valve 9, the solenoid valve 14, the water flow detection device 15, the gas solenoid valves 17a and 17b, the gas proportional valve 18, the fan 20, and the like. It controls the operation of the water heater. Reference numerals 21 and 22 denote a shower tap and a hot water tap provided at the tip of the hot water supply channel 6, 23 a connection port for pouring water provided in the bathtub 24, 25 a water level detection device for the bathtub 24, and 26 a remote controller.

[0009]

[Action]

 According to the present invention, when the shower is used, when the shower plug 21 is opened, the water amount sensor 4 detects the water flow to start combustion, and the temperature is set by the remote controller 26. The hot water temperature is controlled. When the shower plug 21 is closed, the water flow sensor stops the water flow and the combustion is stopped. The above is the same when the hot water tap 22 is used. Further, pouring into the bathtub 24 is performed by operating the remote controller 26. When the pouring control valve 9 is opened, pouring is started into the bathtub 24 via the pouring water channel 8. The water flow at this time is detected by the water amount sensor 4, combustion is started, and temperature control is performed so that the temperature is set by the remote controller 26. When the water level detecting device 25 detects that the water level in the bathtub 24 has reached the set water level, the pouring control valve 9 is closed and the pouring operation is stopped. When the hot water in the bathtub 24 has cooled, hot water of about 80 ° C. is poured into the bathtub from the pouring water channel 8 to warm it. In this case, when the pouring control valve 9 is opened by the operation of the remote controller 26, water flows in the pouring water channel 8, and this water flow is detected by the water amount sensor 4 and combustion is started to control the hot pouring water. It Simultaneously with the start of the hot water supply, the on-off valve 7 of the hot water supply channel 6 is closed and the solenoid valve 14 of the bypass channel 13 is opened. At the end of the high-temperature hot water, the pouring control valve 9 is closed, the hot water is stopped, and the opening / closing valve 7 is opened to close the solenoid valve 14.

Therefore, when the shower plug 21 is opened during high-temperature hot water, water flows into the bypass water passage 13, so the water flow detection device 15 detects the water flow and closes the pouring control valve 9 to stop the high-temperature hot water operation. Then, the on-off valve 7 is opened and the hot water supply passage 6 is made to pass through, and the temperature control of the hot water is controlled by the temperature of the shower set by the remote controller 26. The bypass water passage 13 is closed at the time of switching to hot water supply control. When the shower plug 21 is closed and the hot water supply is stopped, the hot water supply operation is resumed. When the opening / closing solenoid valve 14 is used in the bypass water channel 13, the bypass water channel 13 is closed and the total amount of water flows through the heat exchanger during normal hot water supply, so that the hot water outlet temperature can be easily controlled. Further, when a flow rate control valve is provided instead of the solenoid valve 14, it is possible to control the heading temperature in consideration of the bypass water amount in advance.

The high-temperature hot water is stopped by performing a stop operation on the remote controller 26 or when a preset time elapses. In addition, in the case of pouring into the bathtub 24 or high temperature hot water, if the set temperature cannot be obtained by controlling the gas amount, the pouring control valve 9 adjusts the water amount to obtain a predetermined temperature.

[0012]

[Effect of the device]

 According to the present invention, since the open / close valve in the hot water supply channel leading to the shower is closed during hot water supply, there is a small flow rate that cannot be detected by the water amount detection device, or when the water amount detection device fails. Even if there is, hot water does not flow into the shower, and burns can be prevented.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

FIG. 2 is a system diagram showing a conventional embodiment.

FIG. 3 is a system diagram showing another conventional example.

[Explanation of symbols]

1, 1a, 1b. Water heater 2. Water channel 3. Heat exchanger 4. Water amount sensor 5. Thermistor 6, 6a, 6b. Hot water supply channel 7. Open / close valve 8. Pouring water channel 9. Pouring control valve 10. Check valve 11. Check valve 12. Atmosphere release valve 13, 13a. Bypass channel 14. Solenoid valve 15. Water flow detector 16. Gas passages 17a, 17b. Gas solenoid valve 18. Gas proportional valve 19. Burner 20. Fan 21. Shower stopper 22. Hot water supply tap 23. Connection port 24. Bathtub 25. Water level detection device 26. Remote controller 27. Controller 28. Water tap 29. Gas stopper 30. Water flow switch 31. Check valve

Front page continuation (72) Inventor Tsuneharu Kamiishida 1250 Shimoeden, Shimodate, Ibaraki Prefecture, Hitachi Chemical Co., Ltd.Yuki Plant (72) Takao Takahashi 1250 Shimoeden, Shimodate, Ibaraki Prefecture Hitachi Chemical Co., Ltd. Inside the Yuki factory

Claims (2)

[Scope of utility model registration request] 1. A water heater 1 having a hot water supply channel 6 downstream of a heat exchanger, and a pouring water channel 8 branched from the water channel 6 to a bath 24 and having a pouring control valve 9 in the middle thereof. At the hot water supply channel 6, an on-off valve 7 is provided and the heat exchanger 3
The bypass water passage 13 is connected between the water supply passage 2 on the upstream side of the above and the downstream side of the on-off valve 7 in the hot water supply water passage 6, and the water flow detection device 15 and the water amount control means 14 are provided in the middle of the water passage 13. And a water heater. 2. The water heater according to claim 1, wherein the water amount control means is an opening / closing solenoid valve or a flow control valve.