JPH08224284A - Safety device for jet bath - Google Patents

Abstract

PURPOSE: To easily separate foreign matters from an inlet port sucking the foreign matters by providing a bypass inlet port separately from the inlet port and providing a vacuum control valve opened when negative pressure over a prescribed level is applied to an inlet pipeline side in a bypass pipeline. CONSTITUTION: When a pump 5 is operated, hot water 4 in a bathtub 1 is sucked from the inlet port 3, and fetched in the pump 5 via the inlet pipeline 17. The hot water 4 is sent to a jet device 21 via a jet pipeline 19, and discharged from the jet port 7 of an orifice in the inside. At this time, when the foreign matters such as the hand/foot or hair of a person. etc., is sucked accidentally from the inlet port 3, pressure in the rear side housing 33 of the inlet port 3 shows high negative pressure. In other words, the inlet pipeline 17 side, a part of which is constituted of the rear side housing 33 shows the high negative pressure. When such negative pressure exceeds a fixed level, the negative pressure in the inlet port 3 is reduced by opening by deflecting the coil spring 49 of the vacuum control valve 45, which enables the foreign matters sucked in the inlet port 3 to easily be separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet bath device for jetting a mixed jet of hot water (including water) and air into hot water (including water) in a bathtub, and particularly to the jet bath device. The present invention relates to a safety device for ensuring safety when foreign matter is mistakenly sucked in when hot water in a bathtub is taken in through a suction port.

[0002]

2. Description of the Related Art As mentioned above, there are two types of safety devices provided in jet bath devices. One is as shown in FIG. The controller 13 turns off the power of the pump 5 by detecting the pressure change when foreign matter is sucked into the.

The other is, as shown in FIG. 5, a negative pressure actuating valve 15 is attached to the pipe 9 upstream of the pump 5, and the negative pressure is actuated by lowering the pressure when foreign matter is sucked into the suction port 3. The valve 15 is opened, and the valve 5 is sucked in by this opening, whereby the pump 5 becomes idle and the pump 5
Is designed to reduce the suction force (see JP-A-6-31).
9776).

With the above structure, when foreign matter such as limbs and hair is sucked into the suction port 3, the pump 5 is immediately stopped or the suction force of the pump is reduced, so that the limbs and hair are removed. It can be easily separated from the suction port 3.

[0005]

However, according to the former configuration of the prior art, the expensive pressure switch 11 is used.
Since a pressure sensor is required, the cost of the entire device is high. Moreover, wiring for the pressure switch and the pressure sensor is required, and since this safety device is used around water, facilities for waterproofing and insulation are required, further increasing the cost.

Further, according to the latter configuration of the prior art, once the negative pressure operating valve 15 is opened and air is sucked in, it is necessary to prime the pump 5 in order to operate it again. A self-priming pump may be used as the pump 5 in order to eliminate the need for priming, but the cost of the self-priming pump is high, and therefore the cost of the entire apparatus is high. Moreover, when water leaks through the negative pressure operation valve 15, the surroundings of the device may be flooded, which may cause an unexpected problem.

The present invention has been made in order to solve the above problems, and it does not require a pressure switch, a pressure sensor, or wiring, and is a safety device for a jet bath that does not cause priming or water leakage. The purpose is to provide.

[0008]

In order to achieve the above object, the present invention is provided in a jet bath for taking hot water in a bath from a suction port into a pump through a suction pipe and jetting it from a jet port. A safety device for ensuring safety when foreign matter is sucked in from a suction port, a bypass suction port provided separately from the suction port, a bypass pipe connecting the suction pipe and the bypass suction port, and a bypass pipe. And a negative pressure actuating valve that opens when the suction pipe side has a negative pressure above a certain level, and a safety device for a jet bath.

[0009]

[Function] When a foreign matter is sucked from the suction port that takes in the hot water while the pump is working to jet the hot water, the suction pipe side connected to the suction port becomes negative pressure and the negative pressure operating valve opens. By this valve opening, hot water is supplied from the bypass suction port to the suction pipe through the bypass pipe and the negative pressure actuating valve, and the negative pressure is reduced. By reducing the negative pressure, foreign matter can be easily separated from the suction port.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be explained. First, the outline of the entire apparatus will be described with reference to FIG. Below the side surface of the bathtub 1, a suction port 3 for sucking the hot water 4 in the bathtub 1 is provided. The suction port 3 is connected to a suction pipe 17 outside the bathtub 1. The suction pipe 17 is connected to the pump 5, and is further connected to the jet pipe 19. The jet pipe 19 is connected to the jet device 21. The jet device 21 is provided with an orifice (not shown),
The hot water 4 is jetted from the jet port 7 into the bathtub 1 at high speed.

As shown in FIG. 2, on the front surface of the suction port 3,
A lid 25 to which the suction port filter 23 is attached is provided. The lid 25 is attached to the front housing 27. The rear portion 27A of the front housing 27 is
It is watertightly inserted into a hole 29 formed in the side surface of the bathtub 1. A male screw 31 is formed on the outer periphery of the rear portion 27A. For this male screw 31, the rear housing 3
A female screw 35 formed on the inner circumference of the front surface of the screw 3 is screwed.
The front surface of the rear housing 33 is pressed against the side surface of the bathtub 1 from the back side to further enhance watertightness. The rear housing 33 constitutes a part of the suction pipe 17 and is connected to a suction pipe body (not shown). The suction pipe body is connected to the pump 5.

A bypass suction port 37 is provided on the side surface of the bathtub 1 at a position between the suction port 3 and the jet device 21. In this bypass suction port 37, a mouthpiece 41 is inserted into a hole 39 formed in a side surface of the bathtub 1, a rear end of the mouthpiece 41 is connected to a bypass pipe main body 43, and further, a part of the suction pipe 17 is formed. It is connected to the side housing 33. A negative pressure operation valve 45 is provided between the bypass pipe body 43 and the rear housing 33. The bypass pipe main body 43 and the negative pressure operation valve 45 constitute a bypass pipe 44.

The negative pressure actuated valve 45 includes a valve housing 46.
The ball valve 47 disposed inside is pressed against the valve seat 50 by the coil spring 49 to close the valve. The urging force of the coil spring 49 is set to such a magnitude that the coil spring 49 bends and opens when the pressure in the rear housing 33 forming a part of the suction pipe 17 becomes a negative pressure above a certain level. Further, the male screw 5 formed on the lower end of the valve housing 46 of the negative pressure actuating valve 45.
1 is screwed and connected to a female screw 53 formed in the hole 52 of the rear housing 33. Hereinafter, the operation of this embodiment will be described mainly with reference to FIG.

In a normal state, when the pump 5 operates, the pressure inside the suction port 3 changes from a positive pressure (pressure when the pump is stopped) to a negative pressure (pressure when the pump is operating), and the hot water 4 in the bathtub 1 is suctioned. 3 is pumped through the suction pipe 17
Is taken into. The pump 5 sends the hot water 4 to the jet device 21 through the jet pipe 19, and the jet device 21 causes the hot water 4 to jet from the jet port 7 at a high speed from the internal orifice. With this jet flow, a massage effect or the like can be obtained.

While the pump 5 is working,
If a foreign object such as a person's limb or hair in the bathtub is mistakenly sucked through the suction port 3, the pressure in the rear housing 33 of the suction port 3 becomes a larger negative pressure. That is, the suction pipe side 17 side of which the rear housing 33 forms a part has a large negative pressure. When this negative pressure exceeds a certain value (negative pressure operating valve set pressure) or more, the coil spring 49 of the negative pressure operating valve 45 bends and opens (FIG. 3). Hot water 4 in the bathtub 1 by opening the valve
Is supplied into the rear housing 33 through the bypass suction port 37, the bypass piping main body 43 and the negative pressure operating valve 45. That is, it is supplied to the back side of the suction port 3. As a result, the negative pressure at the suction port 33 becomes small.

When the negative pressure decreases, the negative pressure actuating valve 45 closes again. When the negative pressure operating valve 45 is closed, the negative pressure is increased again and the negative pressure operating valve 45 is opened. By repeating this, the pressure is set to a small negative pressure (negative pressure operating valve set pressure).
It is maintained near the value of and does not become a large negative pressure. By reducing the negative pressure, the foreign matter sucked into the suction port can be easily separated from the suction port. Therefore, it is possible to prevent an unexpected inconvenience from being caused when the foreign matter remains sucked.

On the other hand, in the case where the negative pressure actuating valve 45 of the present invention is not provided, once the foreign matter is sucked into the suction port 3, the negative pressure becomes larger and exceeds the dangerous pressure. That is, it is easy for the limbs, hair, and the like to continue being sucked into the suction port 3. According to this embodiment, it is possible to prevent such a dangerous pressure.

As described above, according to this embodiment, the negative pressure actuating valve 45 only has a mechanical structure that operates by negative pressure, and does not require a pressure switch pressure sensor as in the conventional case. Therefore, the wiring for the pressure switch pressure sensor is also unnecessary. Furthermore, waterproofing and insulation for wiring are unnecessary.

Further, since the negative pressure operation valve 15 (FIG. 5) as in the conventional case is opened and the pump 5 sucks in air and idles, the suction force of the pump 5 is not reduced. There is no need to prime the pump to get it working again. Further, the negative pressure actuating valve 45 is not opened to the outside to suck air as in the conventional case,
Since it is provided in the bypass pipe 44, even if water leaks from the negative pressure operating valve 45, water will not leak to the outside of the bypass pipe 44. The problem of being dead can be avoided.

Although the bypass suction port 37 is provided between the suction port 3 and the jet device 21 in the above-mentioned embodiments, it is not necessarily such a position in other embodiments, and the bathtub is not necessarily located at such position. It may be at any position as long as it can suck the hot water 4 in 1. For example,
A bypass suction port 37 may be provided near the jet port 7 for jetting the hot water 4 of the jet device 21. If the bypass suction port 37 is provided integrally with the jet device 21 as described above, it is not necessary to newly open a hole 39 on the side surface of the bathtub 1 in order to provide the bypass suction port 37.

[0021]

As described above, according to the present invention, the negative pressure actuating valve is opened when foreign matter is sucked from the suction port to generate a negative pressure above a certain level, and the hot water is passed through the bypass pipe from the bypass suction port. Is supplied to the suction side pipe, the negative pressure at the suction port is reduced, and the foreign matter can be easily separated from the suction port. Therefore, it is possible to secure the safety when a foreign substance is sucked in without using a pressure switch or a pressure sensor as in the conventional case, so that the pressure switch and the pressure sensor and the wiring are not necessary, and the cost of the apparatus can be suppressed.

Further, unlike the conventional negative pressure actuated valve, it does not suck air to idle the pump when a negative pressure is generated, so that it is not necessary to prime the pump to make it work again. Also, even if water leaks from the negative pressure operated valve,
Since the negative pressure actuated valve of the present invention is not opened to the outside when opened, but is provided in the bypass pipe, there is no problem of flooding the surroundings of the device.

[Brief description of drawings]

FIG. 1 is a schematic overall view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of an A part showing a main part of FIG.

FIG. 3 is a diagram showing pressure fluctuations at the suction port for illustrating the operation of this embodiment.

FIG. 4 is a schematic overall view showing a first conventional example.

FIG. 5 is a schematic overall view showing a second conventional example.

[Explanation of reference symbols] 1 Bathtub 3 Suction port 4 Hot water 5 Pump 7 Jet port 17 Suction pipe 19 Jet pipe 21 Jet device 23 Suction port filter 27 Front housing 33 Rear housing 37 Bypass suction port 44 Bypass pipe 45 Negative pressure actuated valve 47 Ball valve 49 Coil spring 50 Valve seat

Claims (1)

[Claims] 1. A safety device provided in a jet bath device for taking hot water in a bathtub from a suction port into a pump through a suction pipe and jetting it from a jet port, for ensuring safety when foreign matter is sucked from the suction port. There, when the bypass suction port provided separately from the suction port, the bypass pipe connecting the suction pipe and the bypass suction port, and the suction pipe side provided in the bypass pipe has a certain negative pressure or more. A safety device for a jet bath, which is equipped with a negative pressure operating valve that opens at