JPS5920941B2 - Consumable water heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a device for heating consumed water using a liquid heating medium, in particular for district heating water, which comprises a once-through heat exchanger and a heat exchanger for heating consumption water depending on the amount of water consumed. The present invention relates to a device having an automatic control device for adjusting the flow rate of a liquid heating medium flowing through an exchanger, thereby maintaining the temperature of consumed water substantially constant even if the consumption amount changes.

In conventional devices of this kind, the above-mentioned regulating device consists of a thermostatic control valve that detects the temperature of the consumed water.When the temperature decreases due to an increase in consumption, the thermostat detects this and opens the valve further. configured to pass a larger amount of heated liquid medium or heated water through the heat exchanger,
This allows the temperature to be adjusted to a predetermined level.

However, a thermostatic control valve that instantaneously responds to temperature fluctuations has not yet been proposed.

Therefore, when the consumption amount fluctuates, it is not possible to maintain the temperature of the consumed water constant, and there is a possibility that the temperature fluctuates due to a sudden change in the consumption amount.

Typically, the response time of a thermostat is about 45 seconds, and for this reason it is generally recommended that the high temperature condition be maintained at first until the thermostat responds to the cold consumption water being supplied to the heat exchanger at the same time that consumption begins. A certain amount of water is supplied.

In order to prevent this, it is considered desirable to connect the hot water container to a positive flow type heat exchanger.

However, this container not only makes the equipment expensive, but also causes some heat loss due to the fact that the water in the container must be maintained at a temperature corresponding to the thermostat setting during periods of non-consumption.

Furthermore, the thermostatic valve itself is expensive and its efficiency and reliability are not optimal.

The object of the present invention is to eliminate the above-mentioned drawbacks and to provide an apparatus that does not require the installation of a special hot water or hot water container.

The device according to the present invention is configured such that the flow rate of the heating liquid medium to the heat exchanger is increased or decreased in proportion to the increase or decrease in the flow rate of the consumed water by using a flow rate sensing device provided in the consumed water piping system. It is characterized by:

According to the configuration of the present invention, the flow rate of supplied hot water or warm water is directly controlled in proportion to the flow rate of consumed water.

That is, since this control can be performed by a mechanical control device without delay in operation, the flow rate adjustment of hot water can be performed reliably and instantaneously.

In this device of the invention, heating of the consumed water takes place immediately at the beginning of consumption, so that a hot water storage vessel as described above is not required.

In a preferred embodiment, the regulating device is connected to the heated liquid medium flow path 1.
For example, it is constituted by a valve that is provided on the return side of the heat exchanger and can be opened gradually, and gradually increases the flow rate of the heating medium in response to the gradual increase in the flow rate of the consumed water detected by the above-mentioned flow rate sensing device.

The flow rate sensing device can be constituted by a movable flow rate sensing member provided on the inlet side of the consumption water flow path 1, for example, a heat exchanger.

The sensing members are arranged so that the water flow cross-sectional area of adjacent pipe sections increases or decreases in response to increases or decreases in the flow rate of consumed water, respectively.

According to one aspect of the invention, a regulating device is proposed for controlling the flow rate of the heating liquid medium in accordance with the actual flow rate of the consumed water, as will be described later.

Hereinafter, a specific example of the present invention will be described in detail with reference to the drawings.

The heating device shown in FIG. 1 has a once-through heat exchanger HE configured as a water container.

This heat exchanger has a top inlet and a bottom water inlet for receiving cold consumption water from a water source Cin, and the water W to be consumed can be taken out from a hot water outlet tap T.

A copper helical tube S is arranged inside the heat exchanger vessel, which tube is connected at the bottom of the vessel to a supply pipe for a hot heating medium liquid, such as district heating water.

In addition, this steel pipe is connected to the return side H of the heating medium system at the top of the container.
connected to r.

The consumption water piping system, for example the inflow pipe, is equipped with a flow rate sensing device F.
is provided, and this device F is equipped with a movable feedback member that can assume a position corresponding to the actual flow rate of the consumed water.

In addition, a regulating device R is disposed in the heating medium piping system, for example, at the connection to the above-mentioned return side Hr. .

It has a valve member in direct mechanical connection with the flow sensing member of device F in a closed manner.

In this way, the supply of heating medium increases or decreases instantaneously in response to variations in the actual water consumption.

Therefore, even if the amount consumed changes, the temperature of the hot water can be maintained substantially constant.

When water is not being consumed, valve R is closed; however, in order to maintain the water in the container at a temperature even in such cases, valve R is provided with a narrow leakage passage that is very confined within the copper pipe. It is possible to allow a flow of heating medium water at a controlled flow rate.

The characteristic configuration of the present invention relates to the flow sensing device F and the regulating device R and does not concern the detailed arrangement of the various inflow and outflow pipe systems, however, the inflow and outflow pipe systems are shown in FIG. It is worth pointing out that it is extremely advantageous to arrange them as shown in the figure.

For example, if, as is customary, the heating medium inlet and the consumption water outlet are arranged at the top of the container, the consumption water adjacent to the top of the container is heated to a very high temperature as soon as the valve is closed.

This is because the newly introduced heating medium has a high temperature, thereby overheating the hot consumption water at the top of the container.

When such overheating occurs, precipitation of the contained components is promoted.

On the other hand, as taught by the present invention, if the inlet of the consumption water and the outlet of the heating medium are provided at the top and the bottom.

The heat of the heating medium adjacent to the bottom of the container exchanges heat with the surrounding consumption water and is distributed within the container by natural convection within the consumption water.

In this way. Consumable water in the container is protected from overheating,
Moreover, at the same time, the precipitation of undesirable components in the container as described above is reduced.

The control device shown in FIG. 2 includes a flow rate sensing device F and a regulating device R. The control device shown in FIG.

In general, the device F comprises a cylinder part 2 with an inflow connection ζ-ib 4 and an outflow connection vibro.

This cylinder part 2 is provided with a piston valve member 8 fixed to a piston rod 10 and which serves to close the outflow opening 11 to the connecting vibro when no water is consumed. do.

On the other hand, the space located below the piston communicates with an inflow connection pipe 4, and this pipe 4 is connected to a cold consumption water source Cin.

Piston rod 10 extends upwardly and is connected at its top to a relatively wide piston 12.

The piston 12 operates in a cylinder chamber 14 and is made fluid-tight thereto by a so-called rolling membrane 16 .

The space below the piston 12 communicates with the space below the piston valve member 8 via a passage 18 formed in the wall of the piston valve member 8 or the cylinder part 2 .

Further, the space above the piston 12 is filled with passages 20, 22, 2.
4 and through holes 26 to the outflow connection vibro.

The piston rod 10 extends downward through the packing box 28 into the adjusting device R, and is connected to a piston 29 that is slidably mounted on a cylindrical sleeve 30 provided in the valve Ujifugu 32. has been done.

The valve housing has an inlet connection pipe connected to the pressure side of the heating medium source Win, which connection pipe is open towards the cylindrical sleeve 30 side.

An outflow connection 36 is provided at the bottom end of the valve housing 32, which is connected to the heating medium inlet of the heat exchanger HE and communicates with the lower end of the sleeve 30 via a space 38.

The wall of the sleeve 30 also has a slot 4 extending in the axial direction.
0 is provided, which slot allows heated water to pass from connection 34 to 36 when piston 29 moves upward from its lowest closed position.

Note that the piston 29 is in close contact with the annular valve seat portion 42 in the closed position.

A compression spring 44 is arranged between the top of the piston 29 and the lower side of the packing box 28.

When all taps of the water consumption system are closed, the pressure is of the same magnitude on both sides of the upper piston 12, and the spring 44 is activated with the upper piston 12 in its lowest position. The piston valve member 8 acts to close the outlet 6 of the consumed water.

When one or more taps of the water consumption system are opened, the outlet 6 and thus also the upper space 46 of the upper piston 12
The internal pressure decreases and as a result the inflow pressure under the piston 12 increases, lifting the piston 12 and opening the connection through the outflow opening 11.

That is, the consumed water can flow through the device F.

By opening the hot water tap. The piston device moves immediately and without vibration to the following positions.

That is, the pressure drop at the outlet opening 11 and therefore also the pressure difference in the upper and lower space of the piston 12 causes the spring 4 to
4 to a position where it is in equilibrium with the increased biasing force.

When the stopper is opened wider, the outflow part 6 and the space 46)
The pressure applied thereto decreases further, thereby causing the piston to also move upward to a correspondingly higher position.

When consumption decreases or ceases, the outflow pressure increases correspondingly, so that the piston valve member 8 is displaced to a position corresponding to the biasing force of the spring 44 due to the decreased differential pressure on the piston 12.

In this way, the device acts as a flow sensor that adjusts the position of the piston rod 10 in sequence in response to the flow rate of the consumed water.

The adjustment forces acting on the piston 12 are very high, resulting in large forces useful for mechanically controlling the operation of the piston rod 10 and the lower valve arrangement R.

As will be readily understood, it is displaced together with the lower valve piston 12, thereby progressively controlling the flow rate of the heating medium through the heat exchanger according to the actual flow rate of the consumed water.

Therefore, when properly adjusted, the control devices F, R serve to heat the consumed water to a predetermined temperature, regardless of the magnitude of the flow rate.

To provide adjustment possibilities, the sleeve member 30 of the lower valve arrangement R is arranged as a tubular extension of a bushing 48 mounted inside the lower end portion of the valve housing 32 and rotatably arranged by the bundle 50. It is preferable to configure.

In this case, the bushing 48 has a wide hole 52 communicating with the outlet 36.

When the handle 50 is manipulated to rotate the bushing into position, the valve slot 40 is in a position that is more or less aligned with the opening of the inlet 34, thus -
(the effective width of the valve slot) will be adjusted accordingly.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing the schematic configuration of the apparatus of the present invention, and FIG.
The figure is a sectional elevational view of a regulating and controlling device according to a preferred embodiment of the invention. In the figure, HE is a heat exchanger, Cin is a water source, T is a hot water outlet valve, F is a consumption water consumption sensing device, R is a heating medium flow rate adjustment device, 8 is a piston valve member, 4 is a consumption water inlet, and 6 is a consumption water inlet. 11 is an outflow opening, 12 is a piston, and 29 is a piston of the adjustment device R. 36 C outflow part, 40 slot, 28 packing box,
44 is a compression spring.

Claims (1)

[Scope of Claims] 1. A once-through heat exchanger in which an inflow pipe and an outflow pipe for consumption and an inflow pipe and an outflow pipe for heating medium are connected in an apparatus for heating consumption water with a liquid heating medium. A consumption water consumption amount sensing device provided in the consumption water inflow pipe for sensing the consumption water consumption amount, and a consumption water consumption amount sensing device provided in the heating medium inflow pipe in conjunction with the consumption water consumption amount sensing device to control the flow rate of the heating medium. A heating device for water consumption, which has an adjustment device that adjusts the water consumption in proportion to the amount of water consumption, and maintains the temperature at a desired temperature even if the amount of water consumption changes. The water consumption amount sensing device F is partitioned into two compartments by an outflow opening 11 provided in the inflow pipe Cin for consumed water through which the consumed water passes, and a piston 12, and one compartment is separated from the outflow opening 11. a cylinder chamber 1 communicating with the upstream side of the outflow opening 11 and communicating the other compartment with the downstream side of the outflow opening 11;
4, and is provided to slide on the outflow opening 11,
a valve member 8 mechanically connected to the intermediate wall; and a biasing device 44 for biasing the valve member 8 in a direction that closes the outflow opening 11, the valve member 8 being connected to the adjusting device R.
, such that the regulating device R regulates the flow rate of the heating medium in proportion to the water consumption, and the valve member 8 is connected to the opening 11 corresponding to the water consumption. A device characterized in that it is adapted to be displaced into a certain position. 2. In the device according to claim 1, the adjustment device R is provided with an inlet opening 34 communicating with the heating medium inflow pipe Win, and a slot 40 communicating with the inlet opening 34. It has a rotatable sleeve 30 and a piston 29 coupled to the valve member 8 slidably disposed in the sleeve 30, whereby the inlet opening 34 and the slot 400 overlap by rotating the sleeve 30. 1. A device characterized in that the heating temperature of the consumed water can be set by changing the supply amount of the heating medium.