JPH0527550U - Water heater with bath hot water supply function - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In the water heater with bath hot water supply function, the water supply passage and the water filling circuit are separated so that the desired water temperature can be obtained from the water tap even during water supply operation. This prevents the deterioration of the hot water discharge characteristics when the hot water tap is opened after the water supply operation. [Structure] The main body 1 of the water heater with bath hot water supply function is the water heater 2
And a bath kettle 3 is built-in, a bath hot water supply pipe 10 is provided branching from a hot water supply pipe 9 that connects the hot water supply device 2 to the hot water tap 8, and the three-way valve 1
1. It is exposed to the hopper 13 via the automatic bath hot water supply valve 12, and is connected to the bath heat exchanger 7, the circulation circuit 14, and the bath 26. Reference numeral 16 is a bypass water circuit that is connected between the water flow detection means 15 and the water supply port 17 to the three-way valve 11 without the water heater 2, 18 is a pressure switch, 19 is control means, and 20 is a remote controller.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water heater with a bath water heating function that can be poured into the bath to lower the bath temperature.

[0002]

[Prior Art]

 As a conventional example that is technically closest to this invention, as shown in FIG. 6, by using a hot water filling circuit to drop unheated water from the water heater into the bathtub, not only boiling but also bathtub There are things that make it possible to lower the bath temperature.

[0003]

[Problems to be solved by the device]

 However, in such a conventional example, since the hot water outlet and the hot water filling circuit have a structure branched on the hot water supply / heat exchange hot water outlet side, when water is to be poured from the hot water filling circuit to the bathtub, However, unheated water will be poured into the hot water supply heat exchanger, and only water can be used from the outlet in the water supply, and even if the outlet is opened after the water supply, the hot water is immediately supplied from the cooled water supply heat exchanger. There was a problem that it did not come out.

[0004]

[Means for Solving the Problems]

 The present invention was made in view of such conventional problems, and a bypass water circuit that allows water to flow from the water inlet to the hot water circuit without passing through hot water heat exchange is provided to connect to the hot water circuit. The purpose is to solve the above problems by providing a three-way valve for selecting whether to connect the bypass water circuit or the hot water supply / heat exchange hot water supply side.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention. First, the structure of the water heater with bath hot water supply function is as follows. The water heater main body 1 has a hot water supply device 2 including a hot water supply burner 4, a hot water supply heat exchanger 5, etc., and a hot water supply device 17 from the water supply port 17 without passing through the hot water supply heat exchanger 5. A bypass water circuit 16 connecting the outlet side of the heat exchanger 5, a three-way valve 11, a bath automatic hot water supply valve 12, etc., and an outlet side pipe of the water heater 2 is a hot water supply pipe 9 connected to the hot water supply tap 8, and a three-way valve. It branches into the bath hot water supply pipe 10 connected to the bath automatic hot water supply valve 12 via the valve 11. The bypass water circuit 16 is also connected to the three-way valve 11. The outlet side of the automatic bath hot water supply valve 12 faces the hopper 13 provided in the bath heat exchanger 7 and open to the atmosphere. The bath heat exchanger 7 is connected to the bath 25 via the circulation circuit 14.

Reference numeral 15 is a water flow detecting means such as a water flow switch and a water amount sensor. Reference numeral 18 is a pressure switch connected to the bath heat exchanger 7 for detecting the water level in the bathtub, 19 is a control means for controlling various functions of the bath water heater 1 with a hot water supply function, and 20 is the control means. 19 is a remote controller connected to the signal line 21. The remote controller 20 includes an operation switch 22, an automatic operation switch 23, an automatic water supply switch 24, a hot water temperature setting switch 25, and the like.

[0007]

[Action]

 Next, the operation will be described. When the automatic water supply switch 24 is pressed, as shown in FIG. 2, the three-way valve 11 operates so that the bypass water circuit 16 and the bath automatic hot water supply valve 12 are connected, and then the bath automatic hot water supply valve 12 is opened and the hopper 13 is opened. Water is supplied to the circulation circuit 14 via the water. At this time, since water does not flow to the water flow detecting means 15 and therefore is not turned on, the hot water supply burner 4 does not ignite even if the hot water supply operation is possible unless the hot water tap 8 is opened.

When the hot water tap 8 is opened in this state, a water flow newly occurs in the circuit passing through the hot water heat exchanger 5, the water flow detecting means 15 is turned on, the hot water burner 4 is ignited, and the hot water temperature setting switch is turned on. With 24, the set hot water temperature can be obtained from the hot water tap 8. At this time, since the bath hot water supply pipe 10 and the bath automatic hot water supply valve 12 are separated by the three-way valve 11, the water in the bypass water circuit 16 and the hot water in the hot water supply pipe 9 do not mix.

Next, if the automatic water supply switch 24 is pressed again or a predetermined time has elapsed after the automatic water supply switch 24 was first pressed, the bath automatic hot water supply valve 12 is closed, and then the three-way valve 11 is set to the state shown in FIG. As described above, the bath automatic hot water supply valve 12 and the bath hot water supply pipe 10 are operated so that the bypass water circuit 16 is separated from the bath automatic hot water supply valve 12. As conditions for closing the bath automatic hot water supply valve 12, other than the above, although not shown here, whether the cumulative flow rate of the flow sensor that counts only the amount of water to be filled automatically or the amount of water supplied exceeds a predetermined amount, or For example, the hot water temperature may be equal to or higher than a predetermined value.

[0010]

[Effect of the device]

 As described above, according to this invention, a bypass water circuit that allows water to flow from the water supply port to the bath automatic hot water supply valve without passing through the hot water supply heat exchanger is provided, and the connection to the bath automatic hot water supply valve is provided by the bath hot water supply system. Since the three-way valve is used to selectively switch whether to connect to the pipe or to the bypass water circuit, the desired hot water temperature can be obtained from the hot water tap even during the water supply operation, and the hot water supply is performed after the water supply operation. The effect is that it is possible to prevent the tapping property from being significantly deteriorated when the stopper is opened.

[0011]

[Other Examples]

 In place of the hopper 13 of the embodiment of FIG. 1, a vacuum break valve 27 and a check valve 28 were installed in series as shown in FIG. 4, and the bath pot 3 was not of the natural circulation type, but a circulation pump 29 was used. A forced circulation type may be used. Further, the same effect can be obtained by using the two-way valves 30 and 31 and the check valve 32 as shown in FIG. 5 instead of the three-way valve 11 of FIG. It goes without saying that it can also be applied to a bath kettle with a water heater in which the water heater and bath kettle are contained in one package.

[Brief description of drawings]

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

FIG. 2 is a state diagram of the three-way valve when the automatic water supply switch is pressed.

FIG. 3 is a state diagram of the three-way valve when the automatic water supply switch is not pressed and when automatic hot water is supplied.

4 and 5 are views showing another embodiment of the present invention.

FIG. 6 is a diagram showing a conventional example.

[Explanation of symbols]

 1 Water heater with bath hot water supply function 2 Water heater 3 Bath kettle 4 Hot water supply burner 5 Hot water supply heat exchanger 6 Bath burner 7 Bath heat exchanger 8 Hot water tap 9 Hot water supply pipe 10 Bath hot water supply pipe 11 Three-way valve 12 Bath automatic hot water supply valve 13 Hopper 14 Circulation circuit 15 Water flow detection means 16 Bypass water circuit 17 Water inlet 18 Pressure switch 19 Control means 20 Remote control 21 Signal line 22 Operation switch 23 Automatic operation switch 24 Automatic water supply switch 25 Hot water temperature setting switch 26 Bathtub 27 Vacuum break valve 28, 32 Check valve 29 Circulation pump 30, 31 Two-way valve

Claims (1)

[Scope of utility model registration request] 1. A water heater with a bath hot water supply function, which has an automatic hot water supply function for a bathtub in addition to a normal hot water supply function and is capable of automatically supplying the set amount of water or the amount of hot water up to a set water level to the bathtub. It is possible to provide a bypass water circuit that allows water to pass from the mouth without going through the hot water heat exchanger, and to selectively switch whether to connect the bath automatic hot water supply valve to the hot water heat exchanger or to the bypass water circuit. A water heater with a bath hot water supply function, which is provided with a switching means.