JPH01244244A - Hot-water apparatus equipped with automatic water level sensor - Google Patents

Abstract

PURPOSE:To accurately and positively detect the water level in a bathtub by installing a pressure sensor and a flow switch to a connecting pipe which is diverted from a drop pipe and connected to the bathtub. CONSTITUTION:In order to indentify the proper condition of the bathtub water level, a pump 7 is run after a three-way valve 5 is switched to (a) and (b). Where a bathtub 10 is situated higher than the water heater, a pressure sensor 11 detects a proper pressure if the water remaining in the bathtub 10 is at a proper level. If the water level is not proper in the bathtub 10, neither the pressure switch 11 nor the flow switch 12 detects such. Where the bathtub 10 is lower than the hot-water apparatus the pressure switch 11 does not detect a positive pressure if the water level in the bathtub 10 is proper, but the flow switch 12 detects a water flow, hence ON signal outputted, because there is a water circulation in the piping. If there is no proper level of water in the bathtub 10, neither the pressure switch 11 nor the flow switch 12 detects any. Therefore, it becomes possible to remotely detect the water level in the bathtub 10 accurately and positively.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water heater having an automatic water level detector for bathtub water, and is primarily intended to appropriately detect the water level of bathtub water.

(Prior Art) In Japanese Patent Application No. 61-164120, the applicant proposed a water heater that does not require lead wire work for a bathtub water level sensor.

(Problem to be Solved by the Invention) However, simply providing a pressure sensor for detecting the water level in the bathtub in the circulation circuit often makes it difficult to detect the water level in the bathtub properly and reliably. There is room for this.

Therefore, the present invention aims to solve the disadvantages of the prior art and ensure that the water level of hot water in the bathtub can be detected in a perfect manner.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a hot water supply pipe that automatically supplies hot water to the bathtub via a drop-in solenoid valve and a hopper, and a pump provided downstream of the hopper. Bath e? Provided is a water heater having a drop pipe connected to a bathtub, and a 1M pipe branched from the drop pipe and connected to a bathtub, the water heater having an automatic water level detector provided with a pressure sensor and a water flow switch in the connecting pipe. It is something to do.

The present invention also provides a drop-in solenoid valve with a green drop-in solenoid valve that automatically supplies hot water to the bathtub via a hopper, a drop-in pipe provided downstream of the hopper and connected to the bathtub via a pump, and a drop-in pipe connected to the bathtub via a pump. In a device having a connecting pipe that branches off and connects to the ordinary J, the connecting pipe is provided with a pressure sensor and a bathtub water temperature detector, and the connecting pipe is further connected to the drop pipe by bypassing the three-way valve provided at the branching part. The feature is that a bypass pipe is provided to connect the pipe.

(Function) In the present invention, a pump is provided on one side of the passage leading from the hopper to the bathtub, and a pressure sensor J3 and a water flow switch are provided on the other side of the passage. By continuously detecting the pressure of the water sensor, it is possible to quickly and appropriately determine whether or not the water level in the bathtub reaches the position between the circulation fittings of the bathtub.

Further, the present invention provides a pump in one of the passages leading from the hopper to the bathtub, a pressure sensor and a bathtub water temperature detector in the other passage, and bypasses the three-way valve provided at the branching part of the passage to connect both passages. By providing a connecting bypass pipe, when the hot water for the bathtub is dropped by the pump, the bathtub water can be reduced to 1m.
The water level in the bathtub can be detected at the same time as the water level in the bathtub, making it possible to control the water level appropriately and reliably.

(Example) Examples of the present invention will be specifically described below based on the drawings.

In Figure 1, (1) is a heat exchanger for hot water supply as a heat source device that automatically supplies hot water to the bathtub, and (2) is a drop-in solenoid valve installed in the hot water supply pipe (3). It controls the amount of hot water. (4) is a hopper installed for the purpose of preventing bathtub water from flowing backwards. (5) is a three-sided hopper installed in the passage leading from the hopper (4) to the bathtub, which will be described later. The drop pipe (6) from the hopper (4) on one side of the three-way valve to the bathtub is equipped with a pump (7) and a bath heat exchanger (8). 5)
The other side is connected to the bathtub OQ by a connecting pipe (9), and the connecting pipe (9) is equipped with a pressure sensor Qη for detecting the bathtub water pressure and a water flow switch ( 6)) is provided.

To determine whether the water level in the bathtub is maintained at an appropriate level (usually at the upper circulation port (a1 position)), switch the three-way valve (5) to (b) and the pump (7)
If the bathtub OQ is located at a higher position than the water heater depending on the situation at the installation site, the pressure sensor 0υ will detect the appropriate pressure if the remaining water in the bathtub QG is in a normal state. In this case, if there is no appropriate residual water in the bathtub αQ, the pressure sensor C11
) and water flow switch ((2) are not detected.

If the bathtub αQ is at a lower position than the rHI supply device, the bathtub 0
If the remaining water is in an appropriate state, the pressure sensor 0υ will not detect positive pressure, but a circulating water flow will occur in the passage piping, so the water flow switch (12) will detect the water flow and turn on. In this case, if there is no appropriate residual water in the bathtub QO, neither the pressure sensor a nor the water flow switch (b) will detect it.

Therefore, it becomes possible to properly and reliably detect the bathtub water level from a remote location.

In this example, in order to accurately detect the pressure sensor αυ, it is necessary to fill the connecting pipe (9) with water at the beginning of operation.

αJ is a controller, which controls the closing of the drop-in solenoid valve 2) by detecting the appropriate water level of the bath matJ by a water flow switch θ2) or a pressure sensor Ov.

Fig. 2 shows the actual flow side of the present invention, in which a bypass pipe surface is provided to connect the drop pipe (6) and the connecting pipe (9) by bypassing the three-way valve (5), and the connecting pipe (9) is provided. ) is equipped with a bathtub water temperature sensor such as a thermistor. Other members are first
It has the same function as the one in the figure, and is given the same number.

With this configuration, when the pump (7) is driven to pour hot water into the bathtub, (a) of the three-way valve (5)
A circulation circuit is constructed of the pump (7), the bath heat exchanger (8), the bathtub GOS connection pipe (9), and the bypass pipe ση from the (to) side, and the averaged water temperature of the bathtub (111) is The hot water temperature detector (to) will detect it.

Therefore, not only the temperature of bath water but also the water level of the bathtub can be detected using the pressure sensor qυ.

In addition, in order to improve the accuracy of the stop water level of the bathtub hot water relative to the appropriate water level, the pump (7) is forcibly stopped once during automatic hot water supply, the initial water level is measured, and then the water is automatically lowered for a certain period of time. It is also possible to measure the water level and calculate the appropriate target water level based on this data.

Furthermore, as shown in Fig. 3, an on-off valve C141 is provided in the drop pipe between the pump (7) and the bath heat exchanger (8), and the pump (7) and on-off valve C141 are bypassed. A second bypass pipe QFj is provided and the second bypass pipe 7a+ is provided.
If 22 check valve heads are installed in the middle, the inertia of the water being fed will cause the second bypass pipe to flow from the connecting pipe (9) side by intermittently opening and closing the on-off valve a during automatic thread insertion. A water flow is generated by negative pressure on the drop pipe (6) side via a1, and by repeating this operation, the air accumulated in the pipe can be removed, and the detection of the pressure sensor Oυ can be ensured.

In addition, in order to prevent the water level from rising rapidly and causing false detection by the pressure sensor QU if you take a bath during the automatic hot water supply, the water level detection measurement by the pressure sensor 0υ is temporarily canceled when taking a bath. You can.

In addition, the water heater of the present invention automatically supplies hot water to the set appropriate water level when the water level in the bath drops as detected by the pressure sensor Gυ, but if the set water level continues for a certain period of time, an accident may occur in the bathroom. It could be happening. Therefore, if the pressure sensor αυ continuously detects the set pressure for a predetermined period of time or more, an alarm such as a buzzer may be emitted.

Alternatively, the connecting pipe (9) may be omitted and only the dropping pipe (6) may be used, and the dropping pipe (6) may be provided with a pressure sensor and a check valve.

In addition, as an initial setting method for the appropriate water level, there are two methods: one is to adjust and set the volume or IC memory etc. installed in the electric circuit of the pressure sensor while filling the bathtub with water sequentially, and the other is to adjust and set the volume or IC memory etc. installed in the electric circuit of the pressure sensor while filling the bathtub with water. There is a method of adjusting and setting while gradually decreasing the amount of water, but any initial setting method may be used.

〔Effect of the invention〕

As described above, in the present invention, by providing a pressure sensor and a water flow switch in a connecting pipe that branches from a drop pipe and connects to a bathtub, the water level of hot water in a bathtub can be properly and reliably detected.

In addition, by installing a pressure sensor and a bathtub water temperature detector in the connecting pipe, and by providing a bypass pipe that bypasses the three-way valve and connects the drop-in pipe and the connecting pipe, the temperature of the bathtub water can be boiled and detected. At the same time, it becomes possible to detect the water level in the bathtub, making it extremely convenient for practical use.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing one embodiment of the present invention, FIG. 2 is an overall view showing another practical flow side of the invention, and FIG. 3 is a partial view showing another embodiment. (2)...Drop-in solenoid valve (4)...Hopper (5)...Three-way valve (6)...Drop-in pipe (7)...Pump (8)...Bath heat Exchanger (91...connection pipe...bathtub aυ...pressure sensor (b)...water flow switch αD...bypass pipe zero level...bathtub water temperature detector

Claims (2)

[Claims] (1) A hot water pipe that automatically supplies hot water to the bathtub via a drop solenoid valve and a hopper, a drop pipe that is installed downstream of the hopper and connects to the bathtub via a pump, and a drop pipe that branches off from the drop pipe. 1. A water heater having an automatic water level detector, comprising a connecting pipe connected to a bathtub, wherein the connecting pipe is provided with a pressure sensor and a water flow switch. (2) A hot water pipe that automatically supplies hot water to the bathtub via a drop solenoid valve and a hopper, a drop pipe that is installed downstream of the hopper and connects to the bathtub via a pump, and a drop pipe that branches off from the drop pipe. In the device having a connecting pipe that connects to the bathtub, the connecting pipe is provided with a pressure sensor and a bathtub water temperature detector, and the drop pipe and the connecting pipe are connected by bypassing the three-way valve provided at the branch part. A water heater having an automatic water level detector, characterized by being provided with a bypass pipe.