JP3074455B2 - High temperature shut-off valve of hot water washing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of mixing hot water from a hot water supply source and water from a water supply source with little or no use of electric parts and jetting the obtained hot water from a washing nozzle. The present invention relates to a means for preventing hot water from being ejected from a cleaning nozzle when hot water having a temperature equal to or higher than a set temperature is supplied due to a malfunction of a mixing valve or other problems in a hot water cleaning apparatus.

[0002]

2. Description of the Related Art In a hot water washing apparatus, it is necessary to prevent jetting of hot water exceeding a preset temperature from a washing nozzle when malfunction or failure occurs in a mixing valve for mixing hot and cold water. is there.

Conventionally, a temperature fuse, a thermistor, or the like is provided in the middle of a flow path to monitor the temperature, and the temperature is monitored by electric means.
It aims to prevent hot water jetting accidents.

[0004]

In the case where a hot water supply source such as a hot water supply pipe and a water supply source such as a water supply pipe are provided, a hot water washing apparatus that requires little or no electric parts can be installed. This type of hot water washing apparatus includes a mixing valve with a thermostat that mixes hot water from a hot water supply source and water from a water supply source to make hot water of a predetermined temperature, and a pressure reducing device that adjusts a pressure of hot water obtained by the mixing valve. The control valve includes a valve and a cleaning nozzle for ejecting hot water, and a control valve is provided in the connection pipe between the mixing valve and the cleaning nozzle. Then, when the control valve is operated to open the flow path, the hot water from the hot water supply source and the water from the water supply source are mixed by the mixing valve to obtain hot water at the set temperature, and the water pressure is adjusted by the pressure reducing valve. The nozzle is configured to eject toward a human body.

[0005] A hot water cleaning device that does not require electrical components is
Although there is an advantage in that the danger of electric leakage and electric shock is eliminated in a lavatory or unit bathroom where moisture or humidity is high, there is a restriction that an electric water temperature monitoring mechanism such as a temperature fuse or a thermistor cannot be used. Therefore, for a hot water cleaning device that does not require electrical components,
There is a need for new means that can reliably prevent hot water jetting without using electrical means.

[0006]

The high-temperature shut-off valve of the hot water washing apparatus according to the present invention is characterized in that hot water supplied from a hot water supply source and water supplied from a water supply source are mixed to set a predetermined temperature. A hot water flow path is provided in the middle of a hot water flow path that connects a mixing valve that generates hot water and a cleaning nozzle that ejects the hot water.
Make the valve body of the valve cutoff also serve as the valve body of the pressure reducing valve.
A temperature sensing element that operates the valve element when it comes in contact with hot water
That is, the valve body and the temperature sensing element are arranged coaxially .

[0007]

[0008]

The high-temperature shut-off valve according to the present invention employs a temperature-sensitive element for operating the valve element by contacting with hot water having a temperature equal to or higher than a set temperature.

Further, the valve body of the shut-off valve is a structure that also serves as a valve body of the pressure reducing valve and and arranged the valve element and the temperature-sensitive element coaxially
Therefore , the size can be reduced.

[0010]

FIG. 1 is a drawing schematically showing an example of a flow path structure of a hot water washing apparatus provided with a high temperature shut-off valve 30 having a pressure reducing valve according to the present invention. A hot water supply source such as a hot water supply pipe (not shown), a water supply source such as a water supply pipe (not shown), and a mixing thermostat 20 (mixing valve with an automatic temperature control mechanism using a temperature sensing element) are provided between the hot water supply path 13 and the hot water supply path 13. The mixing thermostat 20 is connected by a water supply flow path 14 and the hot water flow path 3
5 is connected to the washing nozzle 3 via a high-temperature shut-off valve 30 with a pressure reducing valve provided in the middle of the cleaning nozzle 3. The washing nozzle 3 of the present embodiment includes a shower nozzle 3a for general anal washing and a charm nozzle 3b for female washing. Opening / closing valves 61, 6 are provided at the inflow portions of the nozzles 3a, 3b, respectively.
2 are provided. A check valve 15 is provided between the hot water supply source and the mixing thermostat 20.

On the downstream side of the high-temperature shut-off valve 30 with the pressure reducing valve, the hot water flow path 35 is branched into
Is provided. A flow path switching valve 40 is provided at the introduction site of the waste water flow path 44, and a waste water valve 4 is provided downstream thereof.
5. A temperature display section 46 and a vacuum breaker 47 are provided, and reach the waste water port at the end of the waste water flow path 44. The waste water port is usually installed so as to open to the toilet bowl of the toilet to which the hot water washing device is attached. The hot water flow path 35
A non-return valve 36 is provided between the branching portion of the valve and the flow path switching valve 40.

A bypass passage 50 is provided branching from the middle of the hot water supply passage 13, and the bypass passage 50 is provided with a pressure reducing valve 5.
2 is connected to the flow path switching valve 40.

The mixing thermostat 20 is for automatically adjusting the mixing ratio of hot water and water so that hot water at a set temperature is obtained, and is set to, for example, 38 ° C.

The high-temperature shut-off valve 30 with a pressure-reducing valve has a pressure-reducing valve function for preventing the water pressure of the hot water supplied from the mixing thermostat 20 from being too high and causing the washing nozzle 3 to suddenly operate during normal use. , Ru apparatus der having both a high temperature shut-off valve functions so as not to eject it from the cleaning nozzle 3 when the high-temperature hot water is fed by upset other defects of the mixing thermostat 20. Atsushi Ko shut-off valve function, is incorporated temperature-sensitive element which expands and exceeds a predetermined temperature, based on the expansion of the temperature sensitive element upon contact with hot water, the valve body of the pressure reducing valve by operating to close Be demonstrated.

The flow path switching valve 40 is for switching the water drain path in accordance with the temperature of the initial cold water remaining in the hot water supply flow path 13. That is, when the water temperature of the hot water supply flow path 13 is low, a flow path is formed that bypasses the hot water flow path 35 and leads the initial cold water in the hot water supply flow path 13 directly to the waste water flow path 44 (FIG. 1).
(See FIG. 1A), when the water temperature in the hot water supply passage 13 rises and reaches a certain temperature or higher, the flow passage is changed so that the initial cold water in the hot water passage 35 is guided to the waste water passage 44 (FIG. 1). (B)). The flow path switching valve 40 can be configured to automatically switch the flow path based on a change in water temperature by using the same temperature-sensitive element as that used for the mixing thermostat 20. C is set to the flow path switching point.

A temperature indicator 46 provided in the middle of the drainage flow passage 44 detects that the temperature of the hot water flowing in the wastewater flow passage 44 exceeds a set temperature. For example, a special thermochromic ink that changes color, such as one that exhibits a blue color at a low temperature and changes to a red color when the temperature is increased, is used.

In the present embodiment, the mixing thermostat 20, the high-temperature shut-off valve 30 with the pressure reducing valve, the flow path switching valve 40, the bypass flow path 50, the pressure reducing valve 52, the check valves 15 and 36 constituting the hot water washing apparatus 1 are provided. A temperature controller 10 which is integrated and has an external appearance as shown in FIG. 2 and an internal structure as shown in FIGS. 3A to 3C is employed. 3A is a front sectional view partially omitted, FIG. 3B is a plan sectional view taken along line XX of FIG. 3A, and FIG. 3C is YY of FIG. It is a side surface sectional view in a line.

The components of the temperature controller 10 will be described.
11 is a hot water supply connection portion to which a pipe from a hot water supply source is connected, 12
Is a water supply connection part to which a pipe from a water supply source is connected, 13 is a hot water supply flow path, 14 is a water supply flow path, 15 is a check valve, 20 is a mixing thermostat, 21 is a mixing valve body, and 22 is a mixing valve body. It is a temperature-sensitive element. Reference numeral 30 denotes a high-temperature shut-off valve with a pressure reducing valve.
Reference numeral 2 denotes a temperature-sensitive element, both of which are arranged coaxially.
Then, when the temperature sensing element 32 expands due to thermal expansion, the shut-off valve body 31 slides to close the flow path and prevent water flow. The temperature sensing element 32 automatically returns when the temperature returns to the original level. 35 is a hot water flow path, 36 is a check valve, 37
Is a hot water delivery unit. 40 is a flow path switching valve, and 41
Is a flow path switching valve body, 42 is a temperature sensing element, and 43 is a drain port for discharging initial cold water. 52 is a pressure reducing valve, and 51 is a bypass pipe forming a bypass flow path.

FIG. 1 shows a mode of use of the hot water cleaning apparatus of this embodiment.
(A) to (C) of FIG. 1 and (A) to (C) of FIG.
FIGS. 4 to 6 show the operating states of the temperature controller 10 corresponding to the respective usage modes. In FIG. 1, the flow of hot water is indicated by a thick line, and in FIGS. 4 to 6, the flow of hot water is indicated by arrows. In FIGS. 4 and 5, reference numeral 45 denotes the drainage channel 4.
4, a waste water valve provided in the middle of 4, a temperature display section 4,
Numeral 8 is a dump port. The upper surface of the temperature display section 46 is constituted by a copper plate 46a coated with thermochromic ink 46b,
A vacuum breaker 47 for preventing backflow is provided in the middle of the waste water port 48. In FIG. 6, reference numeral 61 denotes an open / close valve for the shower nozzle 3a, 62 denotes an open / close valve for the charm nozzle 3b, 3 denotes a cleaning nozzle including a shower nozzle and a charm nozzle, and 70 denotes a pressure release port.

Prior to the start of washing, first, as shown in FIG. 1A, the waste water valve 45 of the waste water flow path 44 is opened to discharge the initial cold water in the flow path. When the temperature of the hot water in the flow path is, for example, 32 ° C. or less, the temperature controller 10 controls the flow path that directly connects the hot water supply flow path 13 and the flow path switching valve 40 with the bypass flow path 50 as shown in FIG. Form. As a result, as shown in FIG. 1A, the initial cold water existing in the hot water supply flow path 13 between the hot water supply source and the mixing thermostat 20 is removed by the bypass flow path 50.
The water is guided to the waste water flow path 44 and discharged.

As the discharge of the initial cold water from the hot water supply passage 13 proceeds, the water temperature of the hot water supply passage 13 gradually rises. When the water temperature eventually rises to a predetermined temperature (for example, 32 ° C.), the temperature sensing element 42 of the flow path switching valve 40 expands, and moves the flow path switching valve body 41 as shown in FIG. Thereby, the communication between the bypass flow path 50 and the waste water flow path 44 is cut off, and at the same time, the flow path is switched to the flow path connecting the hot water flow path 35 and the waste water flow path 44, and as shown in FIG. Hot water flow path 35 through thermostat 20 and high temperature shutoff valve 30 with pressure reducing valve
The initial cold water inside is discharged.

By continuing the discharge of the initial cold water, the water temperature of the waste water flow path 44 further rises, for example, by 34 °.
When the temperature exceeds C, the thermochromic ink in the temperature display section 46 changes color. By recognizing this color change, the user can
It is possible to know that the discharge of the initial cold water existing in the flow path of the hot water washing device has been completed.

When the discharge of the initial cold water is completed in this way, the waste water valve 45 is closed, and as shown in FIG. 6, a desired one of the shower nozzle valve 61 and the charm nozzle valve 62 is opened. As a result, FIG.
As shown in (C), the hot water flow path 3 leading to the cleaning nozzle 3
5 is formed, and the hot water adjusted to the desired set temperature from the beginning is supplied to the nozzle 3a, 3 of either the shower or the charm.
Spout from b.

By the way, it is assumed that hot water higher than the set temperature is sent out to the hot water flow path 35 due to a failure of the mixing thermostat 20 or the like. In such a case, in the present invention, the temperature sensing element 32 of the high-temperature shut-off valve 30 that has come into contact with the high-temperature water immediately extends to move the valve element 31, close the flow path, and prevent water flow. Therefore, high-temperature hot water does not blow out from the cleaning nozzle 3, and accidents such as burns can be prevented.

The above description of the present invention is an example, and the present invention does not prevent an appropriate change according to the embodiment.

[0026]

The high-temperature shut-off valve according to the present invention does not require electric energy because the valve element is operated by the temperature-sensitive element, and is therefore applicable to a hot water washing apparatus using no electric parts. Is possible. Generally, the temperature-sensitive element automatically returns when the temperature returns to the original temperature, so that the temperature-sensitive element can be used repeatedly and is economical.

The valve body of the shut-off valve, and also serves as a valve body of the pressure reducing valve, since arranging the temperature-sensitive element and the valve body coaxially, a pressure reducing valve and the high temperature shut-off valve as compared with a case of providing separately Therefore, the casing can be made compact by sharing the casing, and the cost can be reduced by reducing the number of parts by sharing the shutoff valve.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a flow path structure of a hot water washing device provided with a water drainage mechanism according to the present invention, wherein FIG. 1A shows an initial stage of initial cold water discharge, and FIG. ) Shows a state where the initial cold water in the hot water flow path is discharged, and FIG. (C) shows a use state where hot water is ejected from the washing nozzle.

FIG. 2 is a perspective view showing an example of a temperature controller used in the present invention.

3A and 3B show an example of a temperature controller used in the present invention, wherein FIG. 3A is a front sectional view partially omitted, and FIG. 3B is a plan view taken along line XX of FIG. FIG. 7C is a side sectional view taken along line YY in FIG.

4A and 4B show an operation state corresponding to FIG. 1A of a temperature controller used in the present invention, wherein FIG. 4A is a front sectional view partially omitted, and FIG. (A) is a plan cross-sectional view taken along line XX combined with a cross-sectional view of a discarded water valve, a temperature display unit, and a discarded water port. FIG. (C) is a side cross-sectional view taken along line YY of FIG. It is.

5A and 5B show an operation state of the temperature controller used in the present invention corresponding to FIG. 1B, wherein FIG. 5A is a front sectional view partially omitted, and FIG. (A) is a plan cross-sectional view taken along line XX combined with a cross-sectional view of a discarded water valve, a temperature display unit, and a discarded water port. FIG. (C) is a side cross-sectional view taken along line YY of FIG. It is.

6A and 6B show an operation state corresponding to FIG. 1C of the temperature controller used in the present invention, wherein FIG. 6A is a front sectional view partially omitted, and FIG. (A) is a plan sectional view taken along the line XX combined with a sectional view of the shower valve and the charm valve and a drawing of the cleaning nozzle. FIG. (C) is a side sectional view taken along the line YY of FIG. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Temperature controller 11 Hot water supply connection part 12 Water supply connection part 13 Hot water supply path 14 Water supply path 20 Mixing thermostat (mixing valve) 30 High temperature shutoff valve with pressure reducing valve 35 Hot water flow path 40 Flow path switching valve 44 Waste water flow path 45 Waste water Valve 46 Temperature display 48 Waste water port 50 Bypass flow path

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shigeru Iwai 6-59-2 Nakazato, Kiyose-shi, Tokyo NTC Industry Co., Ltd. (56) References JP-A 1-268931 (JP, A) JP-A Sho 59 -158838 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) E03D 9/08

Claims (1)

(57) [Claims] 1. A hot water flow path that connects a mixing valve that mixes hot water supplied from a hot water supply source and water supplied from a water supply source to obtain hot water at a set temperature and a washing nozzle that ejects the hot water. a high temperature shut-off valve provided on, the high temperature cut-off
The valve body of the valve doubles as the valve body of the pressure reducing valve,
A temperature sensing element that operates the valve element when it comes in contact with
A high temperature shutoff valve for a hot water washing device, wherein the valve body and the temperature sensing element are coaxially arranged .