JPH0692907B2 - Water level sensor mounting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water level sensor mounting device for detecting a water level in a bath such as a bathtub connected to a water flow pipe.

[0002]

2. Description of the Related Art A conventional water level sensor mounting device will be described with reference to the sectional view shown in FIG. Conventionally, when the water level sensor cannot be directly attached to the water flow pipe, a T-shaped tube is used and the water level sensor is attached. That is, reference numeral 71 is a water flow pipe, which is connected to a bath such as a bath (not shown). A pipe 72 for mounting the water level sensor 7 is erected on the water flow pipe 71, and the water level sensor 7 is provided above the pipe 72.
The pressure detecting port 73 is connected.

[0003]

However, in the case of the conventional water level sensor mounting device described above, the mounting pipe 72 is used.
When an air pocket is formed in the above, there is a drawback that the pressure data detected by the water level sensor 7 is likely to be erroneously determined. That is,
When the air A pool is formed in the mounting pipe 72, the air A is gradually discharged due to the flow in the water flow pipe 71 due to the operation of the pump or the like. As a result, the water level H is set to the initial position. It gradually increases from. For this reason, there is a drawback that it is difficult to promptly detect the accurate water level of the bath, especially in a bubble bath or other bath apparatus in which air is easily introduced into the water flow pipe.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art and replaces the mounting pipe 72 with a T-shaped tubular structure.
An object of the present invention is to provide a water level sensor mounting device capable of promptly and accurately detecting the water level when detecting the water level.

[0005]

In order to achieve the above object, a water level sensor mounting device of the present invention comprises a water level pipe provided with a pipe for mounting a water level sensor of a bag passage structure, and the pipe for detecting the pressure of the water level sensor. A water level sensor mounting device for connecting a mouth, wherein an inner pipe is provided in the mounting pipe to form a double pipe, and a lower end opening of the inner pipe is exposed to the water flow pipe, and the inner pipe is It is characterized in that a through hole into the mounting pipe is provided in the upper part of the.

[0006]

[Function] While the water flow is flowing, a pressure difference is generated between the lower end opening and the upper part of the inner pipe, so that water rises in the inner pipe, flows out through the through hole into the mounting pipe, and falls. . As a result, the air is pushed downward together, and as a result, it is difficult for the air to accumulate in the mounting pipe, and even if it accumulates, the air is quickly discharged. Therefore, the water level sensor can quickly and accurately detect the water level without being affected by air.

[0007]

1 is a sectional view of a water level sensor mounting device showing an embodiment of the present invention, and FIG. 2 is a configuration diagram showing an example in which the water level sensor mounting device is applied to a bath device with a hot water supply function.

As in the prior art, a water level pipe 71 for mounting a water level sensor is provided upright on the water flow pipe 71, and a pressure detection port 73 for the water level sensor 7 is provided above the pipe 72.

In the present invention, the inner pipe 74 is provided in the mounting pipe 72 to form a double pipe. The lower end opening 75 of the inner pipe 74 faces the inside of the water flow pipe 71 so as to slightly project. Further, a through hole 76 is made to penetrate the upper side wall of the inner pipe 74. When a flow is generated in the water flow pipe 71, a pressure difference is generated between the vicinity of the lower end opening 75 of the inner pipe 74 and the upper portion inside the inner pipe 74, and water enters the inner pipe 74 through the lower end opening 75, rises, and passes through. It flows out from the hole 76, moves downward, and returns to the water flow pipe 71. At this time, if air is accumulated in the mounting pipe 72, the air is pushed out together from the pipe 72 into the water flow pipe 71. Therefore, even if air is introduced into the mounting pipe 72, it is quickly discharged and air is not accumulated in the mounting pipe 72. Further, even if the water is accumulated, it is quickly removed due to the generation of the water flow, so that when the water level is detected by the water level sensor 7, the accurate water level can be promptly detected.

An example in which the water level sensor mounting device is applied to a bath device with a hot water supply function will be described with reference to FIG. 1 is a bathtub, 2 is a circulation circuit for circulating hot water in the bathtub 1,
The circulation circuit 2 is provided with a non-self-priming pump 5 for forcedly circulating hot water. The flow path on the discharge side of the pump 5 is
The foam ejector 3 is divided into a plurality of flow paths, for example, a back flow path 33 and a foot flow path 34, and the end of each flow path, that is, a bath discharge part, is provided with a foam ejector 3.
5 are provided. Flow rate control valves 31 and 32 are respectively provided in the flow paths 33 and 34, and a water level sensor 7 that detects the water level in the bathtub 1 is provided in the foot side flow path 34. Reference numeral 4 denotes an additional heating circuit branched from the discharge side of the pump 5 of the circulation circuit 2, for detecting a bath heat exchanger 6 for heating hot water, a water flow switch 8 used for circulation determination, and the hot water temperature in the bathtub 1. A self-priming pump 21 for flowing hot water is provided in the thermistor 9 and the reheating circuit 4. The reheating circuit 4
Is the back side flow path 33 of the circulation circuit 2 via the three-way valve 42.
Circuit 50 connected to the downstream side of the flow control valve 31 and the circuit 5 connected to the upstream side of the flow control valves 31 and 32.
It is branched to 1.

Reference numeral 3 is a hot water supply circuit for dropping hot water into the bath tub 1, and the hot water supply circuit 3 is connected to the bath tub 1 via a reheating circuit 4.
It is connected to the. The hot water supply circuit 3 is connected to the reheating circuit 4, and the hot water supply circuit 3 has a hot water supply branch circuit 11 branched downstream of the hot water supply heat exchanger 10. This hot water supply branch circuit 11 is connected to a shower, a curran, etc.,
Hot water is supplied to these devices. An inlet water flow rate sensor 12 for detecting an inlet water flow rate from city water and a thermistor 13 for water temperature detection are provided on the upstream side of the hot water supply heat exchanger 10 in the hot water supply circuit 3. Between the hot water supply branch circuit 11 and the hot water supply branch circuit 11, there are provided a flow rate adjusting valve 14 for adjusting the incoming water flow rate and a thermistor 15 for detecting the hot water supply temperature of the hot water supply heat exchanger 10. Reference numeral 38 denotes a bypass passage that connects the upstream side and the downstream side of the hot water supply heat exchanger 10, and the bypass passage 38 is provided with a solenoid valve 39 that opens and closes according to a set value of a hot water supply temperature setting device (not shown). There is. Further, the hot water supply circuit 3 is provided with a drop flow rate sensor 17 for detecting the flow rate dropped into the bathtub 1, a vacuum breaker 18, a drop opening / closing valve 19 for opening / closing the hot water supply circuit 3, and a check valve 20. . Reference numeral 16 denotes a three-way valve provided in the hot water supply circuit 3 downstream of the check valve 20, which branches a backwash circuit 30 connected to a filtration tank described later.

Reference numeral 23 is a filtering circuit that branches from the discharge side of the pump 5 of the circulation circuit 2 and joins and connects to the suction side of the pump 5. A filtering tank 22 is provided midway. A backwash drainage circuit 24 is branched from a location upstream of the filtration tank 22 via a three-way valve 26, and a backwash drain circuit 24 is routed to a location downstream of the filtration tank 22 via a three-way valve 25. The circuit 30 is merged. In the backwash circuit 30, a constant flow governor 27,
A safety valve 40 for preventing water pressure higher than a specified water pressure from being applied to the filtration tank and a drainage channel 41 for discharging water in the backwash circuit 30 to prevent freezing are provided, and the drainage channel 41 has an end at the end thereof. A drain plug (not shown) is provided. The self-priming pump 21 provided in the reheating circuit 4 is driven when an increase in the output value of the pressure sensor 7 is detected while the opening / closing valve 19 is closed.

Hot water supplied to the bathtub 1 is supplied by the hot water supply circuit 3
Is performed by supplying hot water into the bathtub 1 through the reheating circuit 4, the back side flow path 33, and the foot side flow path 34.
In this case, the water level sensor 7 plays a role of detecting whether the water level of the bathtub is higher than the position of the bubble jetting device 35 or finally dropping to a predetermined water level. The reheating of the bathtub 1 is performed by circulating the bathwater in the circulation circuit 2, the bath heat exchanger 6 in the middle of the bath circuit, and the bathtub through the flow paths 33 and 34. In the bubble bath operation, the bath water is circulated in the bath 1 through the circulation circuit 2, the flow paths 33 and 34, and the air is supplied through the air amount control valve 37 and the air supply pipe 36, so that air is mixed. This is performed by ejecting water from the bubble ejector 35. The flow path 34 in which the water level sensor 7 is arranged is in a state in which air is easily mixed in when hot water is dropped, when reheating, when operating a bubble bath, or the like. Therefore, by mounting the water level sensor 7 in the flow path 34 via the above-described water level sensor mounting device of the present invention, it becomes possible to detect the water level quickly and accurately.

[0014]

According to the water level sensor mounting device of the present invention, the pipe for mounting the water level sensor is a double pipe, and the lower end opening of the inner pipe is in the water flow pipe. Since the inner pipe is provided with a through hole in the upper part thereof, air is prevented from accumulating in the mounting pipe even if it has a T-shaped structure, and the accumulated air is promptly collected. It can be eliminated.
Therefore, the water level sensor is not affected by the air,
Accurate water level can be detected quickly.

[Brief description of drawings]

FIG. 1 is a sectional view of a water level sensor mounting device showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example in which the water level sensor mounting device is applied to a bath device with a hot water supply function.

FIG. 3 is a cross-sectional view showing a conventional water level sensor mounting device.

[Explanation of symbols]

 7 Water level sensor 71 Water flow pipe 72 Pipe for mounting water level sensor 74 73 Pressure gauge for water level sensor 74 Inner pipe 75 Lower end opening of inner pipe 76 Through hole

Claims (1)

[Claims] 1. A water level sensor mounting device in which a pipe for mounting a water level sensor having a bag passage structure is erected on a water flow pipe, and a pressure detecting port of the water level sensor is connected to the pipe. An inner pipe is provided to form a double pipe, the lower end opening of the inner pipe is exposed to the inside of the water flow pipe, and a through hole into the mounting pipe is provided at an upper part of the inner pipe. Sensor mounting device.