JPH0282421A - Flowing water detecting equipment - Google Patents

Abstract

PURPOSE:To provide structural simplification of pipe arrangement as well as miniaturization of a product in shape, an also to permit sure detection of a drop in the quantity of flow, by supporting a float to be vertically movable with the body of a detector, floating the float through pressure in flowing water introduced into a cylindrical member from an opening and allowing a switch member to generate a flowing water detection result signal. CONSTITUTION:A cylindrical member 36 having its upper end situated above a preset water level L is arranged within a tank 17 storing flowing water at the preset water level L such that the cylindrical) member 36 may be extended upward and downward, and the cylindrical member 36 is provided at its lower end with an opening 49 opposed to the inflow port 21 of the tank. The body of a detector 37 provided with a switch member 41 generating a flowing water detection result signal is received in the cylindrical member 36 in a zone thereof above the preset water level L, while the body of the detector has a float 44 supported to be vertically movable thereby, and then the float 44 is floated by pressure in the flowing water in excess of the preset water level L introduced into the cylindrical member 36 from the opening 49, so that the switch member 41 is allowed to generate a flowing water detection result signal. This procedure permits to simplify connection structure of pipe arrangement while miniaturizing a product in shape, also with capability of sure detection of any drop in the quantity of flow.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a running water detection device that is installed in a running water storage tank of a water heater such as a hot water hot air heater or an electric water heater to detect the flow of running water. It is something.

[Prior art] As a conventional flowing water detection device of this type, the commercial Dfi46-
An example of this technique is disclosed in Japanese Patent No. 33001.

Figure 3 is a piping diagram of a hot water system equipped with a conventional flowing water detection device.

In the figure, (51) is a hot water storage tank, (52) is a circulation pump, (53) is a check valve, and (54) is an electric heater (
55) and a temperature riser equipped with a temperature sensor (65), (56
) is the water supply pipe, (57) and (58) are the water supply pipes (56
), (59) is a solenoid valve disposed on the hot water storage tank (
An upper water level detector installed at 51>, (60) a lower water level detector, and (61) opening/closing the solenoid valve (57) which is energized or de-energized by the signal from the upper water level detector (59>). The relay (62) to control the lower water level detector (
(60) is a relay that controls the opening and closing of the solenoid valve (58) which is energized or de-energized by a signal from (60), and (63) is a connecting pipe (63) that connects the hot water storage tank (51) and the temperature riser (54).
64) is a flow switch provided above.

Next, the operation of the conventional flowing water detection device configured as described above will be explained.

In the hot water system having the above configuration, at night, the lagoon in the hot water storage tank (51) is kept full of water by the operation of the upper water level detector (59), the relay (61), and the electromagnetic valve (57). Also, during the day there is a lower water level detector (60) and a relay (62).
A relatively small amount of field is stored in the hot water storage tank (51) by the operation of the solenoid valve (58).

When the circulation pump (52) is started in this storage state,
The lake is circulated from the hot water storage tank (51) through a circulation pump (52), a backflow prevention valve (53), a temperature riser (54), and then back to the hot water storage tank (51) again through a heat retention circuit. 5
4>, it is heated by an electric heater (55).

During the circulation of the lagoon, the flow switch (63) detects the running water and turns on the circulation pump (52) and electric heater (55).
) in operation. In addition, if the circulation of hot water stops for some reason, the flow switch (63) detects this and turns on the circulation pump (52) and electric heater (55).
Stop the power supply to prevent abnormal heating of each part.

[Problems to be Solved by the Invention] However, in the conventional flowing water detection device, the flow switch (63) is provided in the middle of the piping, that is, on the connecting pipe (64), so the connection configuration of the piping is complicated. Not only that, but it was necessary to secure a dedicated storage space for the flow switch (63) in the middle of the piping, which caused the product to become larger.In addition, the conventional flow switch (63)
63) generates a flowing water detection signal regardless of the flow rate of flowing water in the connecting pipe (64), so if the flow is caused by clogging of the pipe, etc.
It was not possible to detect a decrease in

Therefore, the present invention can simplify the piping configuration, contribute to the miniaturization of the product shape, and also be able to reliably detect a drop in flow rate.In addition, it can extend the life of the detector, and An object of the present invention is to provide a running water detection device that can prevent the chattering of the detector and the generation of abnormal sounds.

[Means for Solving the Problems] A flowing water detection device according to the present invention includes a cylindrical member whose upper end is located above the set water level, which is disposed in a tank that stores running water at a set water level so as to extend vertically. The lower end of the cylindrical member is formed with an opening facing the inlet of the tank, and above the set water level, the cylindrical member houses a detector body equipped with a switch member that generates a water flow detection signal. The detector body supports a float so that it can move up and down, and the float is floated by the pressure of running water introduced from the opening into the cylindrical member above the set water level, and the water flows from the switch member. It is configured to generate a detection signal.

[Function] In the present invention, since the detector body and the flow i~ are installed in the tank, the piping connection configuration is simplified.

Furthermore, since there is no need for a storage space for the flowing water detector in the piping space, the product shape can be made smaller. Furthermore, when the inflow pressure of flowing water into the inlet is low, the float does not float and the switch member does not output a flowing water detection signal, making it possible to reliably detect a drop in flow rate due to causes such as clogged pipes. . Moreover, since the detector body is disposed above the set water level of the tank, the detector body will not be immersed in hot flowing water when the water heater is stopped, and the life of the switch member etc. will be extended. Moreover, since the flows 1 to 1 are housed inside the cylindrical member, vibration of the float during floating is suppressed, and abnormal noise of the float and chattering of the switch member are prevented.

[Example] The present invention will be explained in detail below.

FIG. 1 is a sectional view showing a running water detection device according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating the configuration of a hot water hot air heater equipped with the running water detection device of FIG.

In Fig. 2, (1) is the casing of the hot water hot air heater, (2) is the oil level regulator connected to a separate fuel tank (not shown), (3) is the fuel pump, (4) is the oil pipe, (5) is a combustor with built-in combustion tube (6), and (7) is the combustion tube (
6) is heated by a heater equipped with a built-in heat exchanger (8) for heating hot water. (9) is the intake port (10) and the exhaust port (
11), and (12) is the intake and exhaust pipe (12).
9) is a combustion blower connected to the intake port (10) via an intake hose (13); (14> is the combustion blower (
a blower pipe that sends air from (12) to the combustion tube (6); (15)
) is an exhaust pipe that guides the exhaust gas that has passed through the hot water heating heat exchanger (8) to the exhaust port (11>) of the intake/exhaust pipe (9).

(17) is a water supply pipe (1) connected to the hot water heating heat exchanger (8).
A distern tank (16) is connected to the distern tank (17) and stores hot water (19) through the distern tank (17).
The water level sensor (20) maintains the warm water (19) in the tank at the set water level (L), and the water level sensor (20)
This is required by a running water detector that detects the flow of hot water (19) from 21). Note that (29>) is a temperature sensor disposed on the hot water pipe (18).

(22) is the outlet (2) of the distern tank (17).
a circulation pump connected to 3) via a hot water pipe (24);
(25) is a heat radiating heat exchanger connected to the circulation pump (22) via a hot water pipe (26), and is necessarily a heat radiating heat exchanger connected to the circulation pump (22) via a hot water pipe (26).
27) and a convection fan (28). (
30) is a reflux pipe that returns the hot water (19) heat radiated by the heat radiating heat exchanger (25) to the hot water heating heat exchanger (8).

Note that (31) is an outlet connection part connected to a hot water injection pipe of a floor heating system (not shown), and the water is circulated through the flow rate control valve (32), the hot water supply pipe (33>, and the hot water supply pipe (26)). It is connected to the pump (22). (34) is an inlet connection part connected to the hot water rapid flow pipe of the floor heating system, and the hot water is connected to the pump (34) through the return pipe (35) and the recirculation pipe (30). It is connected to a heating heat exchanger (8).

In FIG. 1, (36) is the distern tank (1).
7) It is a cylindrical member disposed so as to extend vertically within the cylindrical member, and a flange portion (36a) that is joined to the upper surface of the distern tank (17>) is integrally formed at the upper end of the cylindrical member. The lower end of (36) is located near the inlet (21) of the distern tank (17);
) is formed with an opening (49) facing the opening (49). (50
) is a plurality of adjustment holes formed in the peripheral wall of the cylindrical member (36) below the set water level ([) of the distern tank (17). 19) is returned to the outside of the cylindrical member (36>), and hot water (one) is applied to the float (44>, which will be described later).
The flow M is adjusted. (46> is the set water level ([)
This is an air hole formed in the peripheral wall of the cylindrical member (36) above the cylindrical member (36).

(37) is a detector body housed in the cylindrical member (36) above the set water level (L), and the flange portion (38) at the upper end is connected to the flange portion (36) of the cylindrical member (36).
6a> is attached to the upper surface of the distern tank (17) with a screw (39>). (40> is a guide tube protruding from the lower surface of the detector main body (37>);
) is an upper stopper formed at the connection between the guide tube (40) and the detector main body (37), and (43) is the guide tube (40).
) is a lower stopper attached to the lower end of the (41)
(47) is the reed switch (41) installed in the guide tube (40) for generating a flowing water detection signal.
A lead wire (48) extends from the lead wire (47).
This is a cap that locks onto the top of the detector body (37).

(44) is a float inserted and supported in the guide tube (40) so as to be able to move up and down between the lower stopper (43) and the upper stopper (42), and a magnet (
45) is provided. and the opening (49)
When the float (44) floats up due to the pressure of the hot water (19) introduced into the cylindrical member (36) above the set water level (L), the magnet (45) is activated by the reed switch (
41) is turned on, the reed switch (41) generates a running water detection signal.

Next, the operation of the running water detection device of this embodiment configured as described above will be explained.

In FIG. 2, the combustor (
When the combustion tube (6) in 5) is operated for combustion, the water in the hot water heating heat exchanger (8) is heated by the heat, and the heated hot water is transferred to the hot water pipe by the operation of the circulation pump (22). It flows into the distern tank (17) from the inlet (21) via (18). Warm water (19) in the stern tank (17)
) is always maintained at the set water level (L) by the water level sensor (16), and hot water (19) corresponding to the supply flow rate flows through the outlet (
23) to the circulation pump (22) via the hot water pipe (24)
leaks to.

The hot water (19) discharged from the circulation pump (22) is sent through 8 pipes (
26) and is supplied to the heat exchanger (25) for heat radiation, and heats the surrounding air via the radiation fins (27), and the heated air is discharged into the room by the rotation of the convection fan (28).

Therefore, the entire room can be uniformly heated with relatively low-temperature warm air corresponding to the temperature of the hot flowing water (19). In addition, the hot water (19) after heat radiation passes through the reflux pipe (30) and refluxes to the hot water heating heat exchanger (8).

On the other hand, when using a floor heating device (not shown), the hot water discharged from the circulation pump (22) (one) is connected to the hot water pipe (26).
and hot water supply pipe (33), the flow rate is adjusted by the flow control valve (32>), and the outlet connection part (31) is supplied to the outflow pipe of the floor heating system. ) passes through the return pipe of the floor heating system and returns from the inlet connection (34) to the hot water heating heat exchanger (8) via the return pipe (35) and return pipe (30). Room heating and floor heating can be efficiently performed with a single heat source.

By the way, warm water (1
The flow in step 9) is detected by a water flow detector (2o) installed in the distillation tank (17).

That is, as shown in FIG.
6) introduced within. At this time, the water level of the warm water (19) inside the cylindrical member (36) exceeds the set water level (L) due to the discharge pressure of the circulation pump (22). Therefore, the set water level (L
Flow 1 to (44) at the pressure of hot water (19) exceeding )
) is floated along guide 1 (40). Then, the reed switch (41) in the guide tube (4o) is turned on by the magnet (45) of the float (44), and a flowing water detection signal is generated.
In response to this flowing water detection signal, the combustion tube (6) of the combustor (5)
) is activated, and the heating operation described above is continued.

In this case, since the adjustment hole (5o) is formed in the cylindrical member (36), the warm water (1
A part of the cylindrical member (9) passes through its adjustment hole (5o).
36).

Therefore, the hot water (
The jet pressure of the circulation pump (19) is reduced, and the circulation pump (2
The influence of 2) pulsation is alleviated.

On the other hand, if the circulation pump (22) stops abnormally due to a malfunction, etc.
Alternatively, the flow rate of hot water (19) may decrease due to clogged pipes, etc., and the inlet (2) of the distillation tank (17) may
When the pressure of the warm water (19) in 1) decreases, the water level of the warm water (19) in the cylindrical member (36) increases to 1 to (1).
44), flows 1 to (44) fall onto the lower stopper (43), the reed switch (41) is turned off, and the operation of the combustion tube (6) is stopped. Therefore, it is possible to prevent abnormal heating of various devices due to abnormal stoppage of the circulation pump (22) or clogging of pipes.

In this way, the running water detection device of this embodiment can detect warm running water (19
) is stored at the set water level (L).
), a cylindrical member (36) whose upper end is located above the set water level (L) is arranged to extend vertically, and a distern tank (17) is disposed at the lower end of the cylindrical member (36). an opening (49) facing the inlet (21) of the opening (49), and an adjustment hole (50) that returns a portion of the hot water (19) introduced from the opening (49) to the outside of the cylindrical member (36). A detector main body (37) equipped with a reed switch (41) as a switch member for generating a flowing water detection signal is housed in the cylindrical member (36) above the set water level (L). , the detector body (37) supports flows 1-(44) so as to be movable up and down, and the flows 1-(44) are supported through the opening (
49) into the cylindrical member (36) above the set water level (L), the hot water (19) is floated by the pressure, and the reed switch (41) generates a water flow detection signal. It is something.

Therefore, according to the above embodiment, the running water detector (20)
can be installed inside the cistern tank (17), simplifying the piping connection configuration of the hot water hot air heater, and eliminating the need for storage space for the flowing water detector (20) in the piping space. It can contribute to the miniaturization of the product shape of water hot air heaters.

Furthermore, when the inflow pressure of the hot water (19) at the inlet (21) is low, flows 1 to (44) do not rise to the surface and the reed switch (41) does not output a water flow detection signal.
It is possible to reliably detect a decrease in flow rate due to causes such as pipe clogging.

Moreover, the detector body (37) is the distern tank (17).
) is located above the set water level (L) of the sensor, so that the detector body (37) and fo-1-(44) will not be immersed in the hot flowing water (19) when the circulation pump (22) stops operating. First, the life of the reed switch (41), float (44), etc. is improved.

Moreover, the aforementioned flow rate adjustment effect of the adjustment hole (50) reduces the jet pressure of the hot water (19) inside the cylindrical member (36) and alleviates the influence of the pulsation of the circulation pump (22). , the photographing of the float (44) during floating is suppressed, and the chatter of the reed switch (41), the contact sound between the float (44) and the guide part (40), and the float (44) and the upper stopper are suppressed. (42)
This prevents the occurrence of a collision sound.

Furthermore, the flowing water detection device of this embodiment uses the cylindrical member (36) to adjust the warm flowing water (19) from the inlet (21) to the set water level (
L) is configured to lead to the float (44) above, so if the water depth of the distern tank (17) is deep, the length of the cylindrical member (36) and the adjustment hole (50)
By appropriately changing the opening area, etc., it is possible to use a running water detector (20) having the same specifications.

Note that the present invention is not limited to the configuration of the above-described embodiment, and for example, the shape and size of the opening (49) of the cylindrical member (36), or the shape and size of the lower end of the cylindrical member (36) and the inlet. The adjustment hole (50) can be omitted by appropriately changing the distance between the opening (49) and the flow rate adjustment function of the warm water (19).

Further, in the above embodiment, a reed switch (41) was used as the switch member, but when implementing the present invention,
The present invention is not limited thereto, and various types of switches such as limit switches or proximity switches can be used that have a function of generating a flowing water detection signal when the float (44) floats.

[Effects of the Invention] As described above, the flowing water detection device of the present invention includes a cylindrical member whose upper end is located above the set water level, which is arranged in a tank that stores running water at a set water level so as to extend vertically. , an opening facing the inlet of the tank is formed at the lower end of the cylindrical member, and within the cylindrical member above the set water level is a detector body equipped with a switch member that generates a water flow detection signal. A float is supported in the detector body so that it can move up and down, and the float is floated by the pressure of flowing water introduced from the opening into the cylindrical member above the set water level, and the flowing water is detected from the switch member. It is configured to generate a signal. Therefore, the flowing water detector can be installed in the tank to simplify the piping connection configuration, and the storage space for the flowing water detector in the piping space can be made unnecessary, contributing to miniaturization of the product shape. Further, when the inflow pressure of the flowing water is low, the float does not float, so that a decrease in the flow rate due to confinement such as a clogged pipe can be reliably detected. Moreover, since the main body of the detector is not immersed in hot water when the hot water device is stopped, the life of the switch member and the like can be extended. In addition, the cylindrical member suppresses the imaging of flows 1 to 1 during floating, thereby preventing abnormal noises of the float and chittering of the switch member.

In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts.

Claims (1)

[Claims] (1) The tank is arranged to extend vertically within a tank that stores flowing water at a set water level, and has an upper end located above the set water level, and an opening facing the inlet of the tank at the lower end. a detector body having a cylindrical member; a switch member housed in the cylindrical member above the set water level and generating a flowing water detection signal; A flowing water detection device comprising: a float that floats up under the pressure of flowing water introduced into a cylindrical member above a set water level and generates a flowing water detection signal from a switch member.