JPH0282420A - Flowing water detecting apparatus - Google Patents

Abstract

PURPOSE:To provide structural simplification of piping along with miniaturization of a product inshape, and also to prevent a detector from its chattering and abnormally sounding, attributable to flowing water pressure, by providing a float which is floated according to pressure in flowing water froman influx port and allows generation of a flowing water detection result signal, and a flow regulating cylinder having both an exhaust nozzle and a bypass port arranged in a tank. CONSTITUTION:The apparatus in the title is composed of a body 37 arranged within a flowing water storage tank in its region above its influx port 21, a switch member 41 secured to the body 37, a float 44 supported for rotation and vertical movements by a guide section 40, and then floated by pressure attributive to the flowing water from the influx port 21 so that the switch member 41 is allowed to generate a flowing water detection result signal, and a flowing regulating cylinder 46 arranged within the tank and having both an exhaust nozzle 46a and a bypass port 46b opposed to the under surface of the float 44. Thus, connection structure of piping can be simplified while a flowing water detector accommodation subspace in the space of the piping is made unnecessary to minimize a product in shape, and then pressure in the flowing water from the influx port 21 is eased by the flow regulating cylinder 46, so that any abnormal sound from the float 44 at the time of being floated and chattering of the switch member 41 can be prevented.

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 heating hall 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,
An example of this technique is disclosed in Japanese Patent Publication No. 001.

FIG. 4 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 (
(51) is the upper water level detector installed, (60) is the lower water level detector, and (61) is the electromagnetic valve (57) which is energized or de-energized by the signal from the upper water level detector (59).
), and (62) is a relay that controls opening and closing of the electromagnetic valve (58), which is energized or de-energized by a signal from the lower water level detector (60). (63) is a relay that controls the opening and closing of the solenoid valve (58) ]) and the temperature riser (54) is a flow switch provided on the connecting pipe (64).

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 water in the hot water storage tank (5) is maintained at a full state 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 hot water is stored in the hot water storage tank (51) by the operation of the solenoid valve (5B).

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

While the hot water is being circulated, the flow switch (63) detects the flowing water, and the circulation pump (52) and electric heater (55) are activated.
) in operation. In addition, if the circulation of the field 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, since the flow switch (63) is provided in the middle of the piping, that is, on the connecting pipe (64), the connection configuration of the piping becomes complicated. Instead, it was necessary to secure a dedicated storage space for the flow switch (63) in the middle of the piping, which led to an increase in the size of the product.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a flowing water detection device that can simplify the piping configuration, contribute to miniaturization of the product shape, and prevent chattering and abnormal sounds of the detector due to flowing water pressure. .

[Means for Solving the Problems] A running water detection device according to the present invention includes a main body having a guide section extending vertically above the inlet of a tank for storing running water, and a switch attached to the main body. a member, a float with a specific gravity of greater than 1, which is supported by the guide section so as to be movable up and down and which floats under the pressure of the flowing water from the inlet and generates a flowing water detection signal from the switch member; The float is provided with an ejection hole that faces the lower surface of the float, and a flow rate adjustment tube that has a relief hole that opens in a direction substantially perpendicular to the ejection hole.

[Function] In the present invention, since the main body and the float are installed in the tank, the piping connection configuration is simplified, and
Since there is no need for storage space for the flowing water detector in the piping space, the product shape can be made smaller. Moreover,
Since the pressure of the flowing water from the inlet is eased by the flow rate adjustment tube, photographing 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 partially cutaway front view of a running water detection device according to an embodiment of the present invention, and FIG. 2 is a hot water temperature I! equipped with the running water detection device of FIG. 1 is a configuration explanatory diagram of a heater.

In Fig. 2, (1) is the casing of the hot water hot air heater, (2> is the fixed curved surface vessel connected to a separate fuel tank (not shown), (3> is the fuel pump, (4) is the oil pipe, ( 5) is a combustor with a built-in combustion tube (6), and (7) is a combustor with a built-in combustion tube (6);
This is a heater incorporating a heat exchanger (8) for heating hot water heated by 6>. (9) is the intake port (10) and the exhaust port (
11), and (12> is the intake and exhaust pipe (
9) is a combustion ventilation hole connected to the intake port (10) via an intake hose (13);
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 and exhaust pipe (9).

(17) is a water supply pipe (1) connected to the hot water heating heat exchanger (8).
8) is connected to the distern tank (16) for storing hot flowing water (1), and the distern tank (17) is
The water level sensor (20) attached to the tank is a water flow detector that detects the flow of warm water (19) from the inlet (21) of the stern tank (17). Note that (29) is a temperature sensor disposed on the hot water pipe (18).

(22) is the outlet (2) of the distern tank (17).
3) is a circulation pump connected to the water supply pipe (24) through a water supply pipe (24), and (25) is a water supply pipe (26) connected to the circulation pump (22).
This is a heat radiating heat exchanger connected via a radiating fin (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 that is connected to a hot water outflow 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 water supply pipe (26). It is connected to a pump (22). (34) is an inlet connection part connected to the hot water return pipe of the floor heating device, and is connected to the hot water heating heat exchanger (8) via the return pipe (35) and the return pipe (30). There is.

In FIG. 1, (37) is the flowing water detection device (20).
It is the main body of the body, and the screws (3
9) and the inlet (21) of the distern tank (17).
is installed above. (40) is the main body (37)
a guide tube protruding toward the inlet (21) on the lower surface of the
(42) is an upper flange formed at the connection part between the guide tube (40) and the main body (37); (43) is a guide tube (4);
(41) is a reed switch for generating a flowing water detection signal built into the guide tube (40), (47) is a lead wire extending from the reed switch (41>) , (48) is a cap that locks the lead wire (47) to the upper part of the main body (37).

(44) is a flow 1~ which is vertically movably inserted and supported in the guide cylinder (40) between the lower stopper (43) and the upper stopper (42), and the cylinder is made of a material with a specific gravity greater than 1. A float (4) is formed at the upper part of the inner peripheral surface under the pressure of the hot water (19) from the inlet (21).
4) is provided with an annular magnet (45>) that generates a flowing water detection signal from the reed switch (41) when the reed switch (4) floats toward the upper bath 1 to the collar (42).

(46) is a flow rate adjusting tube inserted and fixed into the inlet (21) so as to cover the inlet (21), and the upper wall thereof has a plurality of jets facing the lower surface of the float (44). A hole (46a>) is formed, and a flow rate adjustment tube (46a) is formed.
A plurality of relief holes (46b) that open in a direction perpendicular to the ejection hole (46a>) are formed in the side wall of 6).

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

In Fig. 2, when the combustion cylinder (6) of the combustor (5) receives fuel supply from the fuel pump (3) and air supply from the combustion air blower FM (12) and undergoes combustion operation, the heat The water in the hot water heating heat exchanger (8) is heated, and the heated hot water is transferred from the inlet (21) to the distillation tank (17) via the hot water pipe (18) by the operation of the circulation pump (22). ).

The water level of the hot water (19) in the gas turbine tank (17) is always kept constant by the water level sensor (16), and the hot water (19) corresponding to the supply flow rate flows from the outlet (23) to the hot water pipe (24). ) to the circulation pump (22).

The hot water (19) discharged from the circulation pump (22) is sent to the hot water pipe (2
6) and is supplied to a heat radiation heat exchanger (25), which heats the surrounding air via radiation fins (27), and the heated air is discharged into the room by rotation of a convection fan (28). Therefore, the entire room can be uniformly heated with a relatively low temperature ffl corresponding to the temperature i 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 warm water (19) discharged from the circulation pump (22) is connected to the hot water pipe (26).
and hot water supply pipe (33>), the flow pressure is adjusted by the flow rate control valve (32), and the flow is supplied to the outflow pipe of the floor heating system from the outlet connection part (31>). ) passes through the return pipe of the floor heating device and returns from the inlet connection (34) to the hot water heating heat exchanger (8) via the return pipe (35) and the return pipe (30). Indoor heating and floor heating can be performed efficiently with this heat source.

By the way, the hot water (1
The flow in step 9) is detected by a water flow detector (20) installed in the cistern tank (17). That is, as shown in FIG. 1, the warm water (19) that has reached the inlet (21) flows into the flow rate adjustment tube (46), and a portion of the warm water (19) flows into the flow rate adjustment tube (46). ) is ejected upward from the jet hole (46a>) and hits the lower surface of the flow! The reed switch (41) in the guide tube (40) is turned on by the magnet (45) of 44) to generate a flowing water detection signal, and in response to this flowing water detection signal, the combustion tube (6) of the combustor (5) is turned on. is activated, and the heating operation described above is continued.

In this case, a portion of the hot water (19) is discharged to the side from the relief hole (46b) of the flow rate adjustment tube (46), so the pressure of the hot water (19) spouted from the spout hole (46a) decreases. Therefore, the levitation blade acting on the float (44) becomes appropriate, and the imaging of flows 1 to (44) during levitation is suppressed, and the chattering of the reed switch (41) and the float (44) are suppressed. Contact sound with the guide tube (40),
Also, the occurrence of a collision sound between the flow h (44) and the upper bath 1-flange (42) is prevented.

On the other hand, if the circulation pump (22) stops abnormally due to a malfunction, etc.
Alternatively, if the flow of hot water (19) is blocked in the middle of the piping for some reason, and the pressure of hot water (19) at the inlet (21) of the distillation tank (17) decreases, the specific gravity may drop to 1. The larger float (44) sinks under its own weight onto the lower stopper (43) and 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 components due to abnormal stoppage of the circulation pump (22) or the like.

In this way, the running water detection device of this embodiment can detect warm running water (19
) to the inlet (21) of the gas tank (17) that stores
) has a guide tube (40) extending vertically above the main body (
37), a reed switch (41) as a switch member attached to the guide tube (40) of the main body (37),
It is rotatably and vertically movably supported by the guide tube (40), floats under the pressure of the hot water (19) from the inlet (21), and has a specific gravity greater than 1 to generate a water flow detection signal from the reed switch (41). A jet hole (46a) disposed in the distern tank (17) so as to cover the float (44) and the inlet (two) and facing the lower surface of the flow 1 (44);
and a flow rate adjusting tube (46) having a relief hole (46b) that opens in a direction perpendicular to the ejection hole (46a).

Therefore, according to the above embodiment, the running water detector (20)
can be installed inside the gas turbine tank (17), simplifying the piping connection configuration of the hot water hot air heater, and eliminating the need for a storage space for the flowing water detector (20) in the piping space. It can contribute to the miniaturization of the product shape of hot water hot air heaters. Moreover, the flow rate adjustment tube (46) is connected to the inlet (21).
) can attenuate the pressure of the hot water (19) to a predetermined pressure, suppressing the photographing of the float (44) during floating,
Chatter and float of reed switch (41)
44) can be prevented.

In addition, in the above embodiment, a closed switch (41) was used as the switch member, but when implementing the present invention,
The switch is not limited to this, and various switches such as a switch used as a proximity switch can be used.

Further, a flow rate adjusting tube (46b) having an ejection hole (46a) facing the lower surface of the float (44) of the above embodiment and a relief hole (46b) opening in a direction perpendicular to the ejection hole (46a)
46) is a plurality of ejection holes (4, 6a) and a plurality of relief holes (46b), but when implementing the present invention, the number of both and the hole to be drilled are not specified, and the float It can be arbitrarily set depending on the weight and size of (44), the flow rate of hot water (19), etc.

[Effects of the Invention] As described above, the flowing water detection device of the present invention includes a main body that is disposed above the inlet of a tank that stores flowing water and has a guide section that extends vertically, and a switch that is attached to the main body. Flow 1~, which is rotatably and vertically movably supported by the member and the guide part and has a specific gravity greater than 1 and which floats under the pressure of the water flowing from the inlet and generates a water flow detection signal from the switch member, and which covers the inlet. It is disposed inside the tank and consists of a nozzle facing the lower surface of the float and a flow rate adjustment tube having a relief hole that opens in a direction almost perpendicular to the nozzle. By installing it inside the tank, the piping connection structure can be simplified, and the storage space for the flowing water detector in the piping space can be eliminated, contributing to the miniaturization of the product shape. Moreover, since the pressure of the flowing water from the inlet is relaxed by the flow rate adjustment tube, vibration of the float during floating can be suppressed, and abnormal noise caused by the float and chattering of the switch member can be prevented.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of a running water detection device according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the configuration of a hot water hot air heater equipped with the running water detection device of Fig. 1, and Fig. 3 is a FIG. 2 is a piping diagram of a hot water device equipped with a conventional flowing water detection device. In the figure, 17: Cistern tank, 19: Warm water flow, 2Q: Flowing water detector, 21: Inlet, 37: Main body, 40: Guide cylinder,
41: Reed switch, 44: Flow 1~,
46: Flow rate adjustment tube, 46a: Nozzle hole, 46b:
It is an escape hole. In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts. Agent: Patent attorney Masuo Daikichi and 2 others

Claims (1)

[Claims] (1) A main body disposed above the inlet of the tank in a tank that stores running water and having a guide section extending vertically; and a main body that is integrally fixed to the main body and generates a water flow detection signal. a switch member; a float having a specific gravity greater than 1, which is supported by the guide portion so as to be movable up and down and floats under the pressure of the flowing water from the inlet to generate a flowing water detection signal from the switch member; and a float which covers the inlet. Flowing water detection, characterized in that the flow rate adjustment cylinder is disposed in the tank and has a jet hole facing the lower surface of the float, and a relief hole opening in a direction substantially perpendicular to the jet hole. Device.