JPH0346069Y2 - - Google Patents

Description

[Detailed explanation of the idea] 【Technical field】

The present invention relates to a technique for controlling the temperature of washing water discharged from a washing nozzle in a heated toilet seat (private washing device) to an appropriate temperature.

[Background technology]

Conventional hot water flush toilet seats detect the water temperature and turn on the heater to heat the hot water using a thermostat.
The heater was turned off to keep the wash water within a predetermined temperature range that would not give a cold sensation or cause burns, but since the temperature of the wash water does not change instantly even when the heater is turned on and off, cold water In some cases, warm water was temporarily discharged from the nozzle and splashed onto the user's body, causing discomfort. Furthermore, if the thermostat malfunctioned, there was a risk that hot water or cold water would be discharged from the cleaning nozzle.

[Purpose of invention]

The present invention was developed in view of the technical background described above, and its purpose is to send cold water below a specified temperature or hot water above a specified temperature to the cleaning nozzle. The goal is to avoid getting cold or hot water on your body.

[Disclosure of invention]

The cold water and hot water removal device of the present invention has a jet nozzle 1 having a substantially conical opening and an inlet 2 communicating with a cleaning nozzle 4 facing each other in a straight line on an upstream side and a downstream side with a space 3 in between. A piston 6 having a substantially conical head 5 that fits into the jet nozzle 1 is slidably housed on the upstream side of the jet nozzle 1,
A flow groove 7 that can be turned spirally is bored in the head 5 of the piston 6, and a low-temperature pipe made of a shape memory alloy is expanded at a temperature higher than a set low temperature to urge the piston 6 away from the jet nozzle 1. A driving element 8 is disposed on the downstream side of the piston 6, and a spring 9 that constantly biases the piston 6 in the direction of fitting the piston 6 into the jet nozzle 1 is expanded at a temperature higher than a set high temperature to fit the piston 6 into the jet nozzle 1. A high-temperature drive element 10 made of a shape-memory alloy that urges the piston 6 in the direction of the piston 6 is disposed on the upstream side of the piston 6, respectively. When cold water is supplied from the upstream side, the piston 6 is fitted into the jet nozzle 1 by the action of the spring 9, so the cold water is discharged from the jet nozzle 1 while rotating spirally through the circulation groove 7. It spreads in the space 3 due to centrifugal force, is not injected into the inlet 2, and is not supplied to the cleaning nozzle 4. In addition, when hot water at an appropriate temperature, which is higher than the set low temperature and lower than the set high temperature, is supplied from the upstream side, the low temperature drive element 8 expands and moves the piston 6 back from the jet nozzle 1 against the spring 9. 1 is opened, hot water is discharged straight from the jet nozzle 1 at high speed, injected into the inlet 2, and discharged from the cleaning nozzle 4. Further, when hot water with a temperature higher than the set high temperature is supplied from the upstream side, the high temperature driving element 10 expands, and the high temperature driving element 10 and the spring 9 act against the low temperature driving element 8 to move the piston 6 toward the jet nozzle 1. Since the hot water is pushed and fitted into the jet nozzle 1, the hot water is discharged from the jet nozzle 1 through the flow groove 7 while rotating in a spiral shape, spreads in the space 3 due to centrifugal force, and is not injected into the inflow port 2 but flows into the cleaning nozzle 4.
It is not supplied to Therefore, cold water and hot water are removed in the space 3 so as not to be discharged from the cleaning nozzle 4 to protect the user's body, and water at an appropriate temperature is supplied from the nozzle only when water at an appropriate temperature within a predetermined temperature is supplied. This allows you to comfortably use the heated toilet seat. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The illustrated fluid pipe 11 for sending hot water has a built-in heater (not shown) and a thermostat (not shown), and a hot water heater (not shown) that heats water to a constant temperature and directs hot water toward the anus. The flow path in the fluid pipe 11 is separated into two by a space 3 in the middle, and a drain port 12 is opened below the space 3. This drain port 12 is communicated with the inside of the toilet bowl, etc., so that waste water is drained into the toilet bowl. A jet nozzle 1 having a substantially conical inner circumference is opened on the upstream side of the space 3, and an inlet 2 that communicates with the cleaning nozzle 4 is opened on the downstream side of the space 3.
The jet nozzle 1 and the inlet 2 are opposed to each other in a straight line with a space 3 in between. A piston 6 having a substantially conical head 5 is slidably installed in the pipe on the upstream side of the space 3 so as to be able to fit into the jet nozzle 1 and close the inside of the jet nozzle 1. A plurality of spiral circulation grooves 7 are bored in the circumferential surface of the head 5 from the rear end to the front end. Therefore, when the piston 6 is retracted, hot water is discharged straight from the jet nozzle 1 at high speed, but when the piston 6 is fitted into the jet nozzle 1, the hot water passes through the flow groove 7 of the piston 6. Only jet nozzle 1
It is now being discharged from Further, a flange 13 is provided around the rear end of the piston 6,
The through hole 1 is bent in an L shape from the rear end surface of the piston 6 to the circumferential surface between the flange 13 and the head 5.
4 is perforated so that hot water can pass through the piston 6 through this hole 14. A protrusion 15 is provided on the inner surface of the fluid pipe 11 on the upstream side of the jet nozzle 1.
On the upstream side of the piston 6, a spring 9 (compression spring) is provided between the protrusion 15 and the flange 13 of the piston 6 for elastically pressing the piston 6 toward the jet nozzle 1 and fitting the piston 6 into the jet nozzle 1.
is built-in. Further, on the downstream side of the piston 6, the piston 6 is extended at a temperature higher than a set low temperature (for example, 25°C) between the flange 13 of the piston 6 and the opening edge of the jet nozzle 1, and the piston 6 is retracted from the jet nozzle 1. A low-temperature drive element 8 is disposed to press in the direction (upstream side), and furthermore, on the upstream side of the piston 6, a temperature higher than a set high temperature (for example, 45°C) is provided between the flange 13 and the protrusion 15. A high-temperature driving element 10 is provided which expands due to temperature and presses the piston 6 in a direction to fit into the jet nozzle 1. Here, the low-temperature drive element 8 is a shape-memory alloy wire wound into a coil, and has a transformation temperature of approximately 25°C, and expands at a temperature higher than a set low temperature (transformation temperature) and at a temperature lower than that. The high-temperature drive element 10 is made of a shape-memory alloy formed into a coil shape, and has a transformation temperature of approximately 45°C. It is stored so that it expands at certain temperatures and contracts at lower temperatures. When cold water is supplied from the upstream side, the low-temperature driving element 8 and the high-temperature driving element 10 are contracted as shown in FIG. I'm forced to. Therefore, the cold water is discharged from the jet nozzle 1 through the circulation groove 7 while swirling in a spiral pattern, and due to the centrifugal force, it spreads out in the space 3 like a ripple and is sprayed, without being injected into the inlet 2. Cold water collides with the wall 16 around the inlet 2 and is discharged from the drain port 12 as droplets, so that the cold water is not discharged from the cleaning nozzle 4. Furthermore, when hot water at an appropriate temperature, which is higher than the set low temperature and lower than the set high temperature, is supplied from the upstream side, the low temperature drive element 8 expands as shown in Fig. 2, so the pressing force of the low temperature drive element 8 Piston 6 moves against jet nozzle 1 against spring 9.
The jet nozzle 1 is opened and hot water passes through the gap between the piston 6 and the inner surface of the jet nozzle 1, is discharged straight from the jet nozzle 1 at high speed, is injected into the inlet 2, and is then injected into the cleaning nozzle 4. It is discharged from. Furthermore, when hot water with a temperature higher than the set high temperature is supplied from the upstream side, the high temperature driving element 10 also expands together with the low temperature driving element 8, as shown in FIG. 3, and the pressing force of the high temperature driving element 10 and the spring 9 increases. The piston 6 is pushed toward the jet nozzle 1 against the low-temperature drive element 8 and fitted into the jet nozzle 1, and the hot water is discharged from the jet nozzle 1 while rotating spirally through the circulation groove 7, and the space is closed due to centrifugal force. 3, and is discharged from the drain port 12 without being injected into the inlet port 2.
A bulge opening 18 is provided at the edge of the jet nozzle 1 on the side of the space 3 to help the hot water spread in a bulging shape due to centrifugal force.

[Effect of the idea]

As described above, the present invention has a jet nozzle having a substantially conical opening and an inlet communicating with a cleaning nozzle facing each other in a straight line on the upstream side and the downstream side with a space between them, and a substantially conical opening that fits into the jet nozzle. A piston having a head is slidably housed on the upstream side of the jet nozzle, a circulation groove is formed in the head of the piston that allows the piston to turn spirally, and the piston is separated from the jet nozzle by being expanded at a temperature higher than a set low temperature. A low-temperature driving element made of a shape memory alloy is disposed downstream of the piston, and a spring that constantly biases the piston in the direction of fitting it into the jet nozzle and a spring that expands at a temperature higher than the set high temperature to cause the piston to tighten. A high-temperature driving element made of a shape memory alloy that urges the piston in the direction of fitting into the jet nozzle is disposed on the upstream side of each piston, so when cold water or hot water is supplied, the piston, the low-temperature driving element, and the high-temperature driving element The device closes the jet nozzle, rotates the cold water or hot water in a spiral pattern, and discharges it from the flow groove, and uses centrifugal force to turn the cold water or hot water into a mist, preventing it from being injected into the inlet, and preventing it from being discharged from the nozzle. To protect the user's body, open the jet nozzle to discharge hot water at high speed only when water at an appropriate temperature within a predetermined temperature is supplied, and inject hot water into the inlet to discharge appropriate temperature water from the cleaning nozzle. is possible,
This has the advantage that the toilet seat with warm water washing can be used comfortably.

[Brief explanation of the drawing]

1, 2, and 3 are cross-sectional views showing one embodiment of the present invention and its operation, in which 1 is a jet nozzle, 2 is an inlet, 3 is a space, 4 is a cleaning nozzle, and 5 is a sectional view showing the operation of the present invention. The head of the piston, 6 is a piston, 7 is a flow groove, 8 is a low temperature drive element, 9 is a spring, and 10 is a high temperature drive element.

Claims (1)

[Scope of utility model registration request] A jet nozzle having a substantially conical opening and an inlet communicating with a cleaning nozzle are arranged to face each other in a straight line on the upstream and downstream sides with a space between them, and a piston having a substantially conical head that fits into the jet nozzle is used as the jet nozzle. A circulation groove is formed in the head of the piston so that the piston can be rotated in a spiral manner, and the piston is expanded at a temperature higher than a set low temperature to urge the piston away from the jet nozzle. A low-temperature drive element made of a shape memory alloy is arranged downstream of the piston, and a spring that constantly biases the piston in the direction of fitting the piston into the jet nozzle is expanded at a temperature higher than a set high temperature to fit the piston into the jet nozzle. A cold water and hot water removal device comprising a high temperature drive element made of a shape memory alloy and biased in the direction, respectively, arranged upstream of a piston.