JPS60221631A - Auxiliary equipment for hot water supply - Google Patents

Abstract

PURPOSE:To make it possible to obtain hot water without waiting time by a simple construction wherein an auxiliary hot water supply unit comprising a hot water tank with a heating device and a mixing mechanism for mixing water with hot water supplied from a hot water supply unit provided on the upstream side is disposed on the immediate upstream side of a hot water supply faucet. CONSTITUTION:A water flow H passing through a hot water tank 11 and water C from a city water inlet 17 run to a flow rate distribution float 19, and the mixture ratio between the two water flows H and C is varied in accordance with the position of the float 19 changed by the operation of a knob 21, whereby a resultant temperature can be obtained. Hot water supplied from a hot water supply unit through a long piping is stored in the hot water tank 11, and it is heated by a sheathed heating wire 12 under the control of a control circuit 28 and a switch 29, so as to be kept at a high temperature. According to this construction, the temperature of the flowing water C is detected by a heat-sensitive bellows 20, the distribution float 19 is moved in response to the detection, and thus hot water of desired temperature is supplied 18 when a faucet is opened. This construction enables the supply of hot water of high temperature without waiting time.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is based on a sufficiently long hot water supply pipe from a water heater, and is installed immediately upstream of a faucet in this hot water supply pipe, so that it does not cool down due to being left in the water supply pipe for a long time. This invention relates to an auxiliary hot water supply device that heats drained water and uses it for practical purposes.

Conventional structure and its problems Conventionally, in the case of a water heater far away from the water heater [1], even though the hot water heater has started operation, the cold water that has accumulated in the pipes is After 60 seconds, the hot water finally comes out, and the waiting time is considered to be fateful, and it is a waste of time to wait.
It was also a waste of precious water resources.

To solve this problem, there is a hot water circulation system used in hotels and the like. Hot water is circulated through the piping between the faucet and the heat source, and the temperature is always kept constant, so that when you turn on the faucet, you can instantly get hot water. However, in general residences, the number of uses,
The total usage time is small, and considering the amount of heat required to keep the circulating water at a certain temperature for a long period of time and the electric power required to constantly run the circulation pump, although the convenience is increased, the running cost is extremely high. Furthermore, in most cases, piping is not required for both going and returning, which not only doubles the length but also nearly doubles the labor and time required for piping work, and when considering the installation of circulation pumps and hydraulic shock absorbers, It is also costly and has not been widely used until now.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional example. It requires only one-way piping, does not require a circulation pump, and can be installed directly in the main stream of a hot water faucet, so that it can be used with an already installed water heater. The purpose is to obtain hot water at a temperature that can be used for practical purposes in a very short time after opening the faucet without any additional operations.

Structure of the Invention In order to achieve the above object, the auxiliary hot water supply device of the present invention provides a hot water tank having a heating source and hot water stored in the hot water tank to the faucet only for a limited period of time immediately after the faucet is opened. It consists of three main parts: a mixing device that can discharge only a certain proportion of the total flow; a flow rate distribution mechanism that controls the discharge rate; a hot water temperature control mechanism that controls the storage temperature; and a safety system that prevents dry heating and overboiling. It has a device and is surrounded by heat insulation +-g.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 is a schematic installation diagram of an auxiliary water heater, in which 1 is a water heater that uses gas as a heat source, 2 is a water supply pipe from water, etc., 3 is an energy supply pipe such as gas, 4 is a hot water outlet pipe, and 5 is the invention of the present invention. In the auxiliary water heater, 6 is a faucet installed via a long pipe 6a, the auxiliary water heater 5 and the faucet 6 are placed as close as possible at 1171 degrees, and 7 is a faucet installed via a short pipe 7a. There is no auxiliary water heater upstream of the faucet, which does not require immediate access to hot water, such as a bathtub hot water supply.

FIG. 2 is a sectional view of the auxiliary water heater. Cylindrical hot water tank 1
1 includes a mirror plate 13 that holds the sheathed heating wire 12 from above.
is attached. 14 is a sealing gasket, and 15 is a tightening screw. At the bottom of the storage tank 11, a flow rate distributor 4 is installed.
y616 is installed.

It consists of a flow inlet 17, a flow outlet 18, a flow distribution valve Vff-1.19, a heat-sensitive bellows 2o, a distribution adjustment knob 21, and a perforated plate 22. flow population 17 and output 1
18 is preferably provided with spanner brackets 17' and 18', respectively. In addition, the flow rate distribution float 19, the bellows 20, and the distribution adjustment knob 21 are connected in a straight line by means such as Nyaf 1-, and one end is ll1lII.
It is fixed at a receiving part A23, and the other end is inserted so as to be slidable in the axial direction at a supporting part B24. 25 is an air vent hole. Heat insulating material 2 for almost all surfaces such as hot water tank 11
At 6, there is a thermostat to prevent dry cooking,
It has a hot water temperature control thermostat (both not shown). A suppressor circuit 28 is installed in the space 27 in the second part of the mirror plate 13.
, switch 29, and earth leakage preventers 30f and 30H can also be accommodated. A casing 31 made of metal or synthetic surface oil is disposed outside 11111 of the heat insulating material 26 to maintain the strength of the main body of the auxiliary water heater. The casing facing the upper space 27 is provided with a gap 32 in order to prevent a rise in temperature of the first decoy circuit 28, which is made up of a 1-stage circuit. The main body is AA', B
It may be possible to divide at B'. When dividing, the hot water storage tank 11 and the r%c jli distribution mechanism 16 are sealed by a vanokink 33 such as a screw and an O-link formed by both. Further, the divided casings are fixed at respective positions with metal fittings or brackets (not shown). The cold water that enters from the left side of the float 19 in the diagram is replaced by the heated water that enters from the right side (indicated by H).

The operation of the above configuration will be explained below.

The flow rate distribution float 19 in FIG.
The water flow H that has passed through i1 and the water flow C that is flowing in and out from the flow rate input 1 enter, and a new synthesis temperature φ) is set at the position of the float 19. In FIG. 2, if the float 19 is to the right, a low synthesis temperature will be obtained, and if it is to the left, a high synthesis temperature will be obtained.

In the graph of Figure 3, the vertical axis represents the water flow temperature at the faucet, and the horizontal axis represents the time elapsed since the faucet was opened. After a period of time (up to A) until all the cold water (temperature 10°C, for example) has been pushed out, and then a period of time (until B) until the cold water has finished heating the pipes and equipment, the water heater is finally set at the water heater set temperature, e.g. temperature 50°C. It becomes °C. Piping length/
Although it varies depending on the diameter, it usually takes 30 to 60 seconds until time B. If the auxiliary water heater according to the present invention is used, for example, as shown in the dotted line graph, the pipe aa leading from the auxiliary water heater 5 to the faucet 6 (although it is planned in the near future) and the faucet can be heated. IIG until the end I11] (up to C) to the time until 1 positive heating power in the hot water tank 11 is exhausted (D
), the hot water supply temperature setting (e.g. 50°C')
(for example, 46°C). The principle will be explained with reference to FIGS. 2 and 4. In Figure 4, the vertical axis shows the temperature of the water flow coming from the left and right sides of float 9.
C and H are shown. Here, the cold water C is shown in FIG. It can be considered to be the same as the graph for a conventional water heater (actual HA). The hot water H maintains this temperature until the hot water in the hot water storage tank runs out, and gradually approaches the flow inlet temperature, but if the heat source (for example, a sheathed heating wire) is turned on, the inlet temperature may become even higher. indicates the temperature of

The dotted line shows the temperature of the mixture of cold water C and hot water H.
This is the same as the dotted line shown in FIG.

The temperature indicated by this dotted line is the set temperature of the hot water tank 11 and the float 1.
It is determined by the split ratio of cold water C and hot water H in 9. Even if the split ratio of cold water C and hot water H changes, it is essential to balance the water flow resistance of both circuits so that the flow rate leaving the faucet remains unchanged.

Therefore, I would like to follow the movement of the water flow. When the faucet 6 is opened, water flows in through the water flow 17, but if the hot water heater 1 further upstream is of a once-through type, operation is started by this water flow. The water flow entering from No.N1 17 is first applied to the heat-sensitive bellows 20, and the bellows 20 is connected to the j'AC distribution float 1 depending on the temperature of the water flow.
Move 9 from side to side; 1\1'' When water j7-IIC is high, the amount of hot water H from the hot water storage tank 11 is reduced, and when the inlet water temperature C is low, the function is to flow more hot water H. be. For example, once hot water has been supplied for a sufficiently long time and the water in pipe 4 has been sufficiently heated? ! #Stop the IJ device,
When restarting hot water supply after a very short pause, inlet 17
Since the temperature of the incoming water stream C is sufficiently high,
Almost no hot water H is needed. On the other hand, when supplying hot water for a long time, unless a high-power heat source is used, the water temperature H in the hot water storage tank 11 will only be slightly higher than the water 1'ill'L entering from input 1'17. There are also circumstances where the set temperature cannot be reached within a certain amount of time. Therefore, the speed at which the water IIi+1 in the pipes decreases, and the
A correlation is required between how quickly the water within 1 is heated. Therefore, depending on the diameter and length of the piping and the immunity conditions, it is possible to select a suitable heat source from above AA' in FIG. 2.

Further, the amount of high-temperature water required at the set temperature in the hot water storage tank 11 varies depending on the diameter and length of the piping, the type of heat source equipment, climate conditions, etc. Therefore, the hot water storage tank 11 between AA'BB' in FIG. 2 may be replaced so that an appropriate amount of hot water storage can be selected.

In addition, in order to obtain a small amount of hot water, you do not have to go to the trouble of operating the hot water dispenser 1. Since there may be cases where only 5 is sufficient, the 6' intimidation tank 11 may be determined taking this into consideration.

In addition to adjusting the capacity of the heat source of the hot water storage tank, the volume of the hot water storage tank, and the distribution ratio of the float, it is also possible to cope with changes in climate by changing the set water temperature of the hot water storage tank.

Because of the effects of the invention, as described below, the i11 assistance device of the present invention is
Just by installing it right in front of the hot water faucet, you can obtain unprecedented effects by simply opening the tap 1-1 to reduce the waiting time and get hot water.

[Brief explanation of the drawing]

Fig. 1 is a hot water supply piping diagram using one embodiment of the auxiliary pumping device of the present invention, Fig. 2 is a cross-sectional view of the F111 auxiliary pump +; rto, and Fig. 3 is a conventional hot water supply system, Showing the hot water temperature of the hot water supply method using the oil-driven water heater of the present invention - No graph, No. 4
The figure is a graph illustrating the principle of obtaining a temperature close to the desired set temperature at a faucet using the auxiliary water heater of the present invention. 11... Hot water storage tank, C. Inlet water flow (low temperature), 12... Seed heating wire, H... Heated water passing through the hot water storage tank (high temperature) 19
・Flow rate distribution float, 21 Distribution adjustment knob, 20-1
'E heat bellows, 22...perforated plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 QCAR) B Renton time Figure 4 Ward A Chair

Claims (1)

[Scope of Claims] (1) A hot water tank including a heating device installed immediately upstream of the oil supply inlet of a mixing faucet or a hot water faucet; and a hot water tank including a heating device installed immediately upstream of the water supply inlet of a mixing faucet or a hot water faucet; An auxiliary hot water supply device consisting of a mixing mechanism that releases hot water at a certain rate at the beginning of hot water supply from a water heater. ) The mixing mechanism consists of a temperature-sensitive bellows that senses the temperature of water entering the tank, and a flow distribution float that adjusts the division ratio between the flow rate of water entering and the flow rate of water exiting from the hot water storage tank, connected by a shaft. The auxiliary hot water supply device according to claim 1, wherein the amount of water flowing out from the tank is changed. (3) A diversion control knob was installed on the outside of the mixing mechanism on the straight line connecting the temperature-sensitive bellows and the flow rate float, making it possible to adjust the temperature of hot water discharged from the mixing mechanism according to the hot water setting temperature of the water heater located further upstream. The auxiliary hot water supply device according to claim 2, (4) having a control mechanism that allows the heating set temperature of the hot water tank to be freely selected according to changes in outside temperature and tap water temperature, according to claim 1. Auxiliary water heater.