JPH0320542A - Hot water supplying apparatus - Google Patents

Abstract

PURPOSE:To make a protection against city water pressure and expanding hydraulic pressure unnecersary in a hot water supply piping system and to prevent hot water from diffusing from a cock by providing a hot water side switching valve at the upstream side of a prompt hot water tank. CONSTITUTION:A mixer 15 having a hot water supply port 21 provided with an expansion water drain valve 30 and a water supply port 22, a hot water side switching valve 13 connected to the port 21, a prompt hot water tank 14 interposed between the valve 13 and the port 21, a water side switching valve 23 connected to the port 22, and a controller 18 for controlling the valve 30, the valve 13 and the valve 23 are provided. Since the valve 13 is provided at the upstream side of the tank 14 in this manner, a hot water circuit after the tank is opened with the atmosphere by closing the valve 13, thereby eliminat ing a protection against city water pressure and expansion pressure. Since the tank is connected to a cock 20 through the hot water supply port of the mixer 15 and the valve 30 is provided on the way, boiling expanding water by a heater in the tank 14 can be prevented from escaping from the valve 30, and the hot water from the cock 20 can be prevented from being diffused.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water heater installed in a kitchen sink or the like.

[Conventional technology]

In recent years, we have entered an era where comfort is required from hot water supply systems as well. Particularly in kitchens, etc., where mixer taps are opened and closed frequently and the amount used per time is small, it is not possible to drain the accumulated water in the hot water supply piping, resulting in a situation where hot water cannot be obtained at the appropriate temperature. As a solution to this problem, it has recently become common sense to install an instant hot water tank.

An example of the above-mentioned conventional water heater will be described below with reference to the drawings. The 5th port shows the overall system configuration, the 6th port shows an enlarged view of the instant hot water tank, and the 7th port shows a horizontal view of the device attached to a kitchen sink. In Fig. 5, 50 is a heat source equipment that uses gas, oil, electricity, etc., and is installed outdoors. 51 is a water supply pipe to the heat source device 50. 52 is a hot water supply pipe that supplies hot water heated by the heat source device 50 indoors, and 53 is an instant hot water tank that stores the hot water supplied from the heat source device 50. Reference numeral 54 denotes a mixing faucet, to which the hot water supply pipe 52 from the instant hot water tank 53 and the water supply pipe 56 are connected, and is provided with a stop valve 57 and a mixing knob 58 for setting the temperature of the mixed hot water. is faucet 59
Take hot water from Further, as shown in FIG. 6, the instant hot water tank 53 has a heater 60 inside. ! : Temperature detection R% 61 is provided, and a configuration in which water is boiled by itself is mainstream, and a relief valve 62 is provided as a safety device to release volumetric expansion of water due to heating. The seventh port is an actual piping port where an instant hot water tank 53 and a mixing faucet 54 are attached to a dressing table 63. The operation of the water heater configured as described above will be explained below. When the stop valve 57 of the mixing faucet 54 is opened, hot water is introduced via the hot water supply pipe 52 and water is introduced via the water supply pipe 56. And the mixing knob 58
The temperature of the hot water is set with the button 59, the introduced hot water is mixed with water, and the water is discharged from the faucet 59. When the stop valve 57 is closed, the hot water supply stops. Instant hot water tank 53 equipped with a heater 60 inside
First, the hot water that it boils itself is supplied to the mixing faucet 54, and the accumulated water that has passed through the hot water supply pipe 52 and the hot water that has been boiled by the heat source device 50 are sequentially introduced. When the temperature of the introduced water is lower than the set value of the temperature detector 6l, the heater 60 is activated to boil the water up to the specified temperature. The volumetric expansion of water that occurs at that time is discharged from the relief valve 62. [Invention tries to solve! ! l! ! ! I] However, the above configuration has the following problems. That is, when the stop valve 57 of the mixing faucet 54 is closed, water pressure is applied to the entire piping system. In addition, since the pressure varies widely from place to place and cannot be regulated, the pressure of the relief valve 62 must be set above the upper limit of the water pressure.
Water leaks from 2. Therefore, all of the hot water supply piping 52 is required to have high pressure resistance, making it a heavy piece of equipment. In addition, as the internal pressure inside the hot water supply pipes 52,55 is released at once when the water stop valve 57 is opened, hot water may blow out from the faucet 59, causing burns. Therefore, an object of the present invention is to provide a water heater that does not require protection against water pressure and expansion water pressure in the water supply piping system, and that can also prevent hot water from blowing out from the faucet. (Means for solving !IQ) The hot water supply device of the present invention includes a hot water supply port provided with an expanded water wandering water valve, a mixing device having a water supply port, a hot water side on-off valve connected to the hot water supply port, and a hot water side on/off valve connected to the hot water supply port. An instant hot water tank interposed between the side on-off valve and the hot water supply port, a water side on-off valve connected to the water supply port, and the expanded water drain valve.Controlling the hot water side on-off valve and the water side on-off valve. [Operation] According to the hot water system of the present invention, since the hot water side on-off valve is provided on the upstream side of the instant hot water tank, by closing the hot water side on-off valve, the hot water side on-off valve is closed. The hot water supply circuit is opened to the atmosphere, eliminating the need for protection against water pressure and expansion pressure.Also, since the piping system is connected from the instant hot water tank to the faucet via the hot water supply port of the mixing device, the expanded water is It escapes from the expanded water drain valve located in the middle of the path. [Example] A water heater according to an embodiment of the present invention will be explained with reference to the same page. First, the overall system structure will be explained using the second page. In the figure, 10 is a heat source device that uses gas, oil, electricity, etc., and is installed outdoors. 11 is a water supply pipe to the heat source ITO. 12 is a heat source device that supplies hot water indoors. A hot water supply pipe is provided with a hot water side opening/closing valve l3 in the middle. 14 is an instant hot water tank, and the interior thereof is equipped with a heater and a temperature detector (not shown).

15 is a mixing device, to which a hot water supply pipe 12 from an instant hot water tank 14 and a water supply pipe 17 are connected. Further, l8 is a control device, and l9 is a setting device. Mixed hot water is at faucet 2
Hot water starts from 0.

Next, the internal configuration of the mixing device 15 will be explained using FIG. 21 is a hot water supply port to which the hot water supply pipe 12 is connected;
is the water supply port, and the water supply pipe 17 is connected to it. A water side on-off valve 23 is provided inside the water supply port 22. moreover,
An expanded water drain valve 30 is provided in the water supply port 2l.
The hot water and water that have passed through the water supply port 2l and the water supply port 22 flow into the mixing valve 24. The mixing valve 24 is connected to a mixing valve driving device 25.
The mixing valve driving device 25 corrects the temperature difference between the indicated value set by the setting device 19 and the temperature detected by the hot water temperature detector 28. take action.

The third figure shows the control opening, and FIG. 4 shows the operation flow diagram. The control unit 1.18 consists of a hot water supply/stop control circuit, a hot water temperature control circuit, and other power supply circuits. The hot water side on-off valve 13, the water side on-off valve 23, and the expanded water drain valve 30 operate in conjunction with each other based on the hot water output/stop i ε from S19. For example, when a hot water tap signal is issued, the hot water side on-off valve 13 and the water side on-off valve 23 become "open", and the expanded water drain valve 30 becomes "closed". Next, when a stop signal is given, the robot performs the opposite operation. Further, when an instruction is given by the mixed water temperature setting signal from the setting device 19, the mixing valve driving device 25 is driven to constantly maintain the mixing ratio in order to correct the difference between the mixed water temperature detected by the hot water temperature detector 28 and the set value. Repeat the operation to match the set value while monitoring. Further, when the mixed water temperature setting value is specified for water or hot water, either the hot water side on-off valve 13 or the water side on-off valve 23 is closed.

According to the water heater installed horizontally in this way, the instant hot water tank 1
Since the hot water side on-off valve 13 is provided on the upstream side of the hot water side on-off valve 13, the hot water supply circuit after the instant hot water tank 14 is opened to the atmosphere by closing the hot water side on-off valve 13, and protection against water pressure and expansion pressure is not required. .

In addition, since the instant hot water tank 14 is connected to the faucet 20 via the hot water supply port 2I of the mixing device 15, and an expanded water drain valve 30 is provided in the middle of the path, the heater in the instant hot water tank 14 The boiled and expanded water escapes from the expanded water drain valve 30, and hot water can be prevented from blowing out from the faucet 2o.

In addition, the mixing device 15 is always warmed by the expanded water, and the expanded water is drained from the expanded water drain valve 3o, eliminating water stagnant inside the mixing device 15, thereby exhibiting an anti-freezing effect. Furthermore, the pressure resistance due to the water pressure applied to the instant hot water tank 14 and the boiling of the heater is less guaranteed, so the shape can be adapted to a restricted space as shown in FIG. 7. [Effects of the Invention] According to the water heater of the present invention, since the hot water side on-off valve is provided on the upstream side of the instant hot water tank, by closing the hot water side on-off valve, the hot water supply circuit after the instant hot water tank is opened to the atmosphere, and the water supply circuit is opened to the atmosphere. No protection against pressure and expansion pressure is required. In addition, since the piping system is connected from the instant hot water tank to the faucet via the hot water supply port of the mixing device, the expanded water escapes from the expanded water wandering valve located in the middle of the path, preventing hot water from blowing out. You can get the effect that you can.

[Brief Description of the Drawings] Fig. 1 is a detailed diagram of an embodiment of the present invention, Fig. 2 is an overall system configuration diagram thereof, Fig. 3 is a control block diagram thereof, and Fig. 4 is a detailed diagram of an embodiment of the present invention.
The figure shows its operation flow, Figure 5 shows the overall system configuration of a conventional example, Figure 6 shows an enlarged view of its instant hot water tank, and Figure 7 shows its installation state. l3...Hot water side on/off valve, 14...
Instant hot water tank, 15...Mixing device, 18...Control device, 21...Hot water supply port, 22...Water supply port, 23...Water side opening/closing valve, 30...Expanded water drain valve No. 1 Figure 19 Figure 4

Claims (1)

[Claims] a mixing device having a hot water supply port and a water supply port provided with an expanded water drain valve; a hot water side on-off valve connected to the hot water supply port; an instant hot water tank interposed between the hot water side on-off valve and the hot water supply port; a water side on-off valve connected to the water supply port, and the expanded water drain valve;
A hot water supply device comprising: a hot water side on-off valve; and a control device that controls the water side on-off valve.