JPH0913463A - Cleaning tank device of stool - Google Patents

Abstract

PURPOSE: To realize system to prevent freezing of water without generating water impact by providing a freezing preventing discharge device capable of flowing the water in a tank into a toilet bowl with small amount, and providing a throttle valve device on a flow passage on the upstream side of a ball tap valve part to flow the water. CONSTITUTION: A freezing preventing discharge device 4 to flow water in a tank into a toilet bowl A with small amount is provided. At a normal temperature, a valve disk is brought close to a valve seat to close a discharge communicating pipe. When a temperature is dropped below the prescribed value, elastic coefficient of a third compressive spring is reduced, the valve disk is pushed away from the valve seat by a fourth compressive bias spring to increase a energizing force, and the discharge communicating pipe is opened. Water in a tank 1 flows into a stool A with small amount through a through hole, a small chamber, and the discharge communicating pipe. When the water temperature rises to the higher value than the prescribed value, the third compressive spring is restored to stop outflow of water in the tank 1 from the discharge communicating pipe. A flow rate can be controlled so as to feed water with small amount in preventing freezing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet bowl cleaning tank device, and more particularly to an antifreezing structure for a toilet bowl cleaning tank device using a diaphragm type ball tap.

[0002]

2. Description of the Related Art Conventionally, in a toilet bowl cleaning tank device used in a cold region where freezing occurs, a small amount of water is always made to flow at a freezing temperature because the flowing water is difficult to freeze. It is known to prevent freezing.

In this type of toilet bowl cleaning tank device, it is necessary to realize both a large flow rate flow at the time of operation at room temperature and a small flow rate flow at the time of freezing prevention. Therefore, the valve opening is directly floated on the ball tap. A linear motion type that is controlled by the buoyancy of a ball is used. However, in the direct-acting type ball tap, the pressure receiving part with a large area is directly closed by the floating ball, so the floating ball has a large volume and cannot be arranged compactly.It also closes the pressure receiving part when the water pressure increases. Since the buoyancy required for water is also increased, the water level for stopping water changes, and there is also the problem of consuming more water than necessary.

On the other hand, it is known that a diaphragm is used as a ball tap having a small floating ball and an extremely small change in water stop level regardless of fluctuations in water pressure. However, a ball tap that uses a diaphragm is basically an on / off valve, and since the diaphragm valve does not directly control the opening of the valve with a floating ball, it is for a large flow rate at normal temperature operation, and it has a small flow rate. In order to perform control, it is necessary to repeat opening and closing for a short period to realize a small flow rate as an average value. Repeating opening and closing like this
Of course, repeated water shocks make it extremely difficult to ensure the durability of the device itself, especially the diaphragm itself, and also have an adverse effect on the equipment of the same piping system. For this reason, in a toilet bowl cleaning tank device using a diaphragm type ball tap, a method of preventing freezing by flowing water has not been realized despite the excellent basic characteristics of the diaphragm type ball tap. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and its object is to make water flow in a toilet bowl cleaning tank device using a diaphragm type ball tap. The purpose of this is to enable a method of preventing freezing without generating water shock.

[0006]

To achieve the above object, in the toilet bowl cleaning tank device of the present invention, in a toilet bowl cleaning tank device using a diaphragm type ball tap, the flush water for draining the water in the tank for toilet bowl cleaning is used. Separately from the drainage device, a freezing prevention drainage device that can open the valve to allow the water in the tank to flow to the toilet bowl with a small flow rate is installed in the tank body, and a throttle valve device is provided in the flow path upstream of the ball tap valve part. Is provided.

In this toilet bowl cleaning tank device, the freezing prevention discharge device is configured to automatically open the valve in response to a temperature below a predetermined temperature set near the freezing point, and the throttle valve device is set to the predetermined temperature. It is desirable that the flow rate is automatically reduced in response to a temperature equal to or lower than the temperature.

The throttle valve device restricts the flow rate of the water supply to be equal to or less than the drainage amount of the antifreezing discharge device, and preferably to be approximately the same as the drainage amount of the antifreezing discharge device.

In any of the cases, the throttle valve device is designed to automatically throttle the flow rate in response to a temperature below a predetermined temperature set near the freezing point. A driving element made of a shape memory material that deforms in response to temperature is provided, and the valve element is driven in the valve closing direction by the deformation of the driving element to throttle the flow rate.

Further, the throttle valve device is provided with a first compression spring for urging the valve body in a valve opening direction and a second compression bias spring for urging the valve body in a valve closing direction. The compression spring No. 1 is configured to eliminate the spring force at a temperature equal to or lower than a predetermined temperature set near the freezing point by the shape memory alloy. Further, the throttle valve device includes a first tension bias spring for urging the valve body in the valve closing direction and a second tension spring for urging the valve body in the valve opening direction. The spring may be configured so that the spring force disappears at a temperature equal to or lower than a predetermined temperature set near the freezing point by the shape memory alloy.

Further, the throttle valve device is provided with an electrically operated throttle valve, a sensor for detecting the water temperature, and a control section for controlling the drive section of the throttle valve based on the temperature detected by the sensor, and the sensor is set near the freezing point. When the temperature equal to or lower than the predetermined temperature is detected, the valve body of the throttle valve may be driven in the valve closing direction to throttle the flow rate. It is desirable that the throttle valve device also serves as a constant flow valve at normal temperature.

[0012]

[Function] As described above, in the toilet bowl cleaning tank device using the diaphragm type ball tap, in addition to the flushing water drainage device that drains the water in the tank for toilet bowl cleaning, the valve is opened and the water in the tank is discharged at a small flow rate. In a toilet bowl cleaning tank device that has a freezing prevention discharge device that can be flowed to the toilet bowl in the tank body and a throttle valve device in the flow path upstream of the valve part of the ball tap, freeze prevention at freezing temperature When the water discharge device is opened to allow a small amount of water to flow at all times, the flow rate is throttled by the throttle valve device to discharge the water in the tank by the freezing prevention discharge device, and the water level in the tank Even if the water supply from the ball tap starts with the lowering of the water, the flow rate of water supply from the ball tap is small compared to when operating at room temperature, and the water level in the tank does not easily recover. Taps are kept in the water supply state for a long time, will not be repeated frequently opened and closed.

In these toilet bowl cleaning tank devices,
If the amount of water supplied when throttled by the throttle valve device is set to be equal to or less than the drainage amount of the antifreeze drainage device, the water level in the tank will remain constant until the drainage from the antifreeze drainage device and wash water drainage device is stopped. The water level of the ball tap is not restored and the water supply state of the ball tap is maintained.
In particular, if the water supply volume when throttled by the throttle valve device is made to be approximately the same as the drainage volume of the antifreeze discharge device, the water level in the tank will be maintained at a level slightly lower than the full water level. It is possible to store it, and it becomes possible to deal with toilet cleaning that can be placed when the antifreeze operation is activated.

On the other hand, in the toilet bowl cleaning tank device provided with the forced opening means for forcibly opening the main valve of the ball tap in place of the above-mentioned freezing prevention discharge device, the ball tap valve is opened by the forced opening means. By opening the valve and throttling the supply water flow rate by the throttle valve device, it is possible to continuously supply a small amount of water from the ball tap until the opened state by the forced valve opening means is released. In addition, even if the water level in the tank rises due to the water supply of the ball tap, if the overflow water level is reached, the overflow water is discharged from overflow water discharge means such as an overflow pipe integrally equipped in the wash water drainage device. Therefore, if the amount of water supplied when throttled by the throttle valve device is set to be equal to or less than the discharge capacity of the overflow water discharge means, there is no risk of water overflowing from the tank. In addition, even if this water is drained from the tank by opening the wash water drainage device, closing the wash water drainage device will cause the water level in the tank to recover to the overflow water level again, so it will be repeated even during anti-freezing operation. Toilet bowl can be washed.

In each of the above-mentioned toilet bowl cleaning tank devices, the antifreeze discharging device, the throttle valve device, the forced valve opening means and the throttle valve device are automatically operated in response to a temperature below a predetermined temperature set near the freezing point. If it is operated automatically, the above can be performed without bothering humans.

Further, if the throttle valve device also functions as a constant flow valve at room temperature, one device can prevent water hammer and normal temperature even if both the throttle valve device and the constant flow valve are not provided. It is possible to eliminate the influence of the fluctuation of the water pressure at the time of the cleaning operation.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, A is a toilet bowl, and 11 is a tank installation portion thereof, and although it is not clear in the drawing, it has a box shape which is integrally formed with the toilet bowl A and opens the upper surface, and the bottom portion is a rim water passage of the toilet bowl A. It has a water supply room 12 that communicates with.

The tank installation portion 11 is covered with a box-shaped cover 13 having an open bottom surface, and the tank is placed in a closed hollow box-shaped space a formed by the cover 13 and the tank installation portion 11. 1 is accommodated and installed.

The tank 1 is formed in a box shape having an open upper surface, and is housed and fixed in the space a so that the outer surface of the tank 1 has an appropriate space 14 between itself and the inner surface of the cover 13. Is equipped with a ball tap 2, a wash water drainage device 3, and an antifreeze drainage device 4.

The ball tap 2 is a water supply device for supplying cleaning water to the tank 1, and a diaphragm type ball tap is used. This ball tap 2 is defined behind the main valve 2a by a main valve 2a provided in a flow path 22 that connects the inflow side and the outflow side of the ball tap body 21, and a valve body 23 (hereinafter referred to as the main valve body) of the main valve 2a. A pressure chamber 25 communicating with the primary-side flow path 22a via a small hole 24 and a pilot valve 2b provided in the pressure chamber 25 and discharging the water in the pressure chamber 25 to the outside of the ball tap body 21 by opening the valve. And a float 26 that moves up and down as the water level in the tank 1 moves up and down.
27 has a conventionally known structure and form linked to the float 26 so that the float 27 is driven in the valve opening direction by the descending of the float 26 and is driven in the valve closing direction by the rising of the float 26, and the pilot valve 2b is opened. Then, the water in the pressure chamber 25 is discharged and the pressure chamber 25 and the primary side flow path
When a differential pressure is generated in 22a, the main valve body 23 composed of the diaphragm is deformed to open the main valve 2a, and the pilot valve 2b is closed to close the water from the small hole 24 to the pressure chamber 25. When the pressure difference between the pressure chamber 25 and the primary-side flow path 22a is eliminated by the inflow, the shape of the main valve body 23 is restored and the main valve 2a is closed.

The ball tap 2 is connected to a water supply connecting pipe 5 which penetrates a side surface of the tank installation portion 11 and is provided in a gap 14 between the cover 13 and the tank 1 through an elbow joint 7 having a throttle valve device 6. Then, from the side wall of the tank 1, the tank 1
It is provided so as to project inward.

The throttle valve device 6 is provided in an elbow joint 7 connecting the ball tap 2 and the water supply connecting pipe 5, which is formed in a substantially L-shape, and is provided in a flow passage 71 extending through both ends of the elbow joint 7. The provided throttle valve seat 61 and this throttle valve seat 61
Of the throttle valve body 62, a first compression spring 63 that biases the throttle valve body 62 in the valve opening direction, and a second compression bias spring 64 that biases the throttle valve body 62 in the valve closing direction. I have it. The throttle valve seat 61 is composed of a valve seat member 61a mounted in a flow passage downstream of the bent portion of the elbow joint 7 so that the seat surface is directed upstream, while the throttle valve body 62 is connected to the valve seat 61. The rear surface is arranged on the primary side, that is, the upstream side, with the rear surface facing the seat surface of the throttle valve seat 61. A shaft 65 is projectingly provided at the center of the back surface of the throttle valve body 62. The shaft 65 penetrates the valve seat 61 and extends to the secondary side, and is provided on a member 61a constituting the valve seat 61. Cylindrical guide 66
It is inserted in the back and forth freely.

The first compression spring 63 is made of a shape memory alloy, and is constructed so that the elastic force extremely decreases and the spring force disappears at a temperature below a predetermined temperature near the freezing point. It is mounted over the back surface of 62 and the valve seat 61. The second compression bias spring 64 is elastically mounted over the inner surface of the flow passage facing the throttle valve seat 61 and the front surface of the throttle valve body 62.

Therefore, in the throttle valve device 6, the throttle valve body 62 is in a position where the forces of the first compression spring 63 and the second compression bias spring 64 are balanced at a normal temperature when the temperature is higher than a predetermined temperature near the freezing point. The throttle valve body 62 functions as a constant flow valve that moves its position forward and backward to change the rated flow rate due to fluctuations in the water pressure applied to the front surface of the throttle valve body 62, but when the water temperature drops below a predetermined temperature near the freezing point, the first Due to the decrease in the elastic coefficient of the compression spring 63 and the relative increase in the urging force by the second compression bias spring 64, the throttle valve body 62 moves toward the throttle valve seat 61 and throttles the opening of the valve. , Operates so as to reduce the flow rate of water supplied to the ball tap 2.

When the water temperature again rises to a temperature higher than the predetermined temperature from the throttled state, the elastic coefficient of the first compression spring 63 is restored, so that the throttle valve body 62 moves from the throttle valve seat 61. By moving in the away direction, the urging force of the first compression spring 63 and the urging force of the second compression bias spring 64 return to the original position, and the flow rate of the water supplied to the ball tap 2 is restored to the original state. .

The throttle valve device 6 needs to have a flow rate when it is throttled at least equal to or lower than the discharge flow rate of the freeze prevention discharge device 4, which will be described later. It is desirable to configure so that the flow rates are almost the same.

In order to make the flow rate when the throttle valve device 6 throttles the flow rate approximately the same as the discharge flow rate of the freeze prevention discharge device 4, the throttle pressed by the second compression bias spring 64. The movement of the valve body 62 to the throttle valve seat 61 side may be stopped at a predetermined position where the valve opening degree allows the same amount of water as the discharge flow rate of the freeze prevention discharge device 4 to flow. As a means, for example, a stopper may be provided at a predetermined position of the guide 66 of the throttle valve device 6. Also, with the second compression bias spring 64 maximally extended,
It is of course possible to design the throttle valve device 6 so that the valve opening degree allows a flow rate substantially the same as the discharge flow rate of the freeze prevention discharge device 4.

The flush water drainage device 3 is provided with a drain valve seat 31 on the bottom surface of the tank 1 so that the secondary side of the valve seat 31 is connected to the water supply chamber 12 formed at the bottom of the tank installation portion 11 and the drain valve seat 31 is provided.
The drain valve body 32 is made to correspond to the primary side of the drain valve body 32, and a valve shaft 33 which is also provided in an upright shape in the center of the drain valve body 32 and serves as an overflow pipe is rotated by an operation handle 34 provided on a side wall of the cover 13. Drain valve 3a
Is opened.

The flush water drainage device 3 is provided with a ring-shaped float chamber 36 surrounding the valve shaft 33, and a ring-shaped float 37 is also housed in the float chamber 36. . The float chamber 36 is formed so that the upper surface is opened below the water line when the tank is full, and the bottom surface is provided at a position higher than the valve lift when the drainage valve body 32 is pulled up. 38 has been opened. On the other hand, the float 37 has an arm 39 at the upper end, and the arm 39 extends upward and is connected to the valve shaft 33 above the upper end of the float chamber 36.

Therefore, in this flush water drainage device 3, the drainage valve 3a is opened by operating the operation handle 34 and pulling up the drainage valve body 32 to drain the water in the tank 1 to the water supply chamber 12.
It can be supplied to the toilet bowl A through a rim water passage connecting to the water supply room 12. The water level in the float chamber 36 decreases as the water level in the tank drops due to the drainage of the wash water. However, since the small hole 38 formed in the bottom surface of the float chamber 36 is small, the water level in the float chamber 36 is in the tank 1. The float 37 in the float chamber 36 falls behind the water level in the tank and falls with the decrease in the water level in the float chamber, and the drain valve element 32 connecting the float 37 to the valve shaft 33 is in the tank 1. After most of the drainage has been drained, sit on the drain valve seat 31 and
3a will be closed.

The freezing prevention discharge device 4 forms a small chamber 42 having a through hole 41 at the bottom of the tank 1, and the water passage area between the small chamber 42 and the water supply chamber 12 formed at the bottom of the tank installation portion 11. Is connected by a drainage communication pipe 43 that can flow only a small amount of water, and the base of this drainage communication pipe 43 is projected into the small chamber 42 to form a valve seat 44 at the protruding end and this valve seat
The valve element 45 corresponding to 44 is arranged in the small chamber 42, and is biased in the valve closing direction by the third compression spring 46 and is biased in the valve opening direction by the fourth compression bias spring 47.

Similar to the first compression spring 63, the third compression spring 46 has a shape formed so that the elastic coefficient is extremely reduced and the spring force disappears at a temperature below a predetermined temperature near the freezing point. It is made of a memory alloy, and is formed such that its elastic coefficient is larger than that of the fourth compression bias spring 47 at room temperature, which is higher than a predetermined temperature near the freezing point.

Therefore, the antifreezing discharging device 4 is designed so that the valve body is operated at room temperature, which is higher than a predetermined temperature near the freezing point.
Although 45 closes the valve seat 44 and closes the drainage communication pipe 43,
When the water temperature drops below a predetermined temperature near the freezing point, the elastic coefficient of the third shape memory alloy compression spring 46 decreases, so the fourth compression bias spring 47 that relatively increases the urging force causes the valve element to move. 45 is pushed away from the valve seat 44, the drainage communication pipe 43 is opened, and the water in the tank 1 flows through the through hole 41, the small chamber 42, and the drainage communication pipe 43 into the toilet bowl at a small flow rate, and the water temperature Rises to a temperature higher than the above predetermined temperature, the elastic coefficient of the third compression spring 46 is restored, so that the valve body 45 uses the biasing force of the third compression spring 46 to move the fourth compression bias spring 47. It moves to the valve seat 44 side against the urging force of, and closes the drainage communication pipe 43 in close contact with the valve seat 44, and stops the outflow of water from the drainage communication pipe 43 in the tank 1.

That is, the freezing prevention discharge device 4 can discharge the water in the tank 1 at a small flow rate only at a low temperature where there is a risk of freezing. The temperatures at which the third compression spring 46 of the antifreezing discharging device 4 and the first compression spring 63 of the throttle valve device 6 lose their spring force due to the decrease in elastic coefficient are set to the same temperature.

When the water temperature drops below a predetermined temperature set near the freezing point, the toilet flush tank device as described above has the drainage connecting pipe 43 of the antifreezing discharge device 4 as described above.
Is opened, and a small amount of flush water stored in the tank 1 starts to flow into the toilet bowl. As a result, the water level in the tank 1 decreases, and the ball tap 2
Since the position of the float 26 is lowered, the pilot valve 2b of the ball tap 2 is opened, and by opening the pilot valve 2b, the main valve 2a is opened and water supply to the ball tap 2 is started.

However, since the water temperature has dropped below the predetermined temperature set near the freezing point, the throttle valve device 6 operates to throttle the flow rate of the water supplied to the ball tap 2 as described above, and the ball tap 2 Therefore, a large flow rate of water that is greater than the discharge flow rate from the freeze prevention discharge device 4 is not supplied. Therefore, the water level of the tank 1 does not rise due to this water supply, the ball tap 2 is maintained in the valve open state, and the water supply is continued, while the water in the tank 1 is drained for freeze prevention 4
Continue to be discharged to the toilet bowl A from the drainage communication pipe 43 of. Therefore, the flow of water flowing from the water supply system to the toilet bowl A via the tank device continues, and the flow of water prevents freezing.

At this time, the throttle valve device 6 is constructed so that the flow rate when the flow rate of the water supplied to the ball tap 2 is throttled by the throttle valve device 6 becomes substantially the same as the discharge flow rate of the freeze prevention discharge device 4. If this is done, the water level in the tank 1 will not almost drop, and the amount of water required for toilet cleaning will always be secured.
The toilet bowl A can be washed at least once.

When the temperature rises and the water temperature rises to a temperature higher than the predetermined temperature near the freezing point, the drainage connecting pipe 43 of the antifreezing discharging device 4 is closed as described above, and the water in the tank 1 is closed. Since the discharge of water is stopped, the water level in the tank 1 rises, and the ball tap 2 first closes the pilot valve 2b due to the upward movement of the float 26, and accordingly the main valve 2a closes to stop the water supply.

At this time, as the water temperature rises to a temperature higher than a predetermined temperature near the freezing point, the throttle valve device 6 also returns to the original state in which the flow rate is not throttled as described above, so that the ball tap is operated at room temperature. From 2, the flow rate of water corresponding to the capacity is discharged.

In the above embodiment, the first compression spring of the throttle valve device is made of a shape memory alloy so that the spring force disappears when the water temperature becomes equal to or lower than a predetermined temperature near the freezing point. , The first spring is a tension bias spring,
Forming the second spring with a tension spring made of shape memory alloy,
The spring force can be eliminated when the water temperature drops below a predetermined temperature near the freezing point.

Next, FIGS. 8 and 9 show the throttle valve device 6 in the second embodiment, in which the operation of the throttle valve device 6 is electrically controlled based on the temperature detection of the temperature sensor 603. Although not shown, the structure of the second embodiment is the same as that of the first embodiment except for the throttle valve device 6.

In this embodiment, the throttle valve device 6 has a throttle valve seat 61 provided with a seat surface facing upstream in a flow passage downstream of the bent portion of the elbow joint 7, and the throttle valve seat 61. The throttle valve body 62 is provided at the same position as the corresponding throttle valve body 62 from the primary side and the first compression spring 63 in the first embodiment, that is, between the throttle valve body 62 and the throttle valve seat 61. A structure is provided in which a spring 67 for urging in the valve opening direction is provided, and the valve body 62 moves back and forth to a position where the spring 67 and the fluid pressure are in balance with the fluctuation of the water pressure applied to the front surface thereof to change the rated flow rate. Unlike the first compression spring 63 in the first embodiment, the spring 67 is not a coil spring made of a shape memory alloy whose elastic coefficient is reduced at a temperature below a predetermined temperature near the freezing point, It is composed of a normal coil spring whose elastic coefficient hardly changes with temperature.

On the other hand, in the flow path upstream of the throttle valve body 62, a push rod 69 having a worm gear 68 at the rear is provided with a throttle valve seat.
It is provided so as to be capable of advancing and retracting through the wall of the elbow at a portion facing 61, and the tip of the push rod 69 faces the front surface of the throttle valve body 62 at a predetermined interval. The worm gear 68 at the rear of the push rod 69 meshes with a motor-driven worm wheel 601 provided outside the elbow joint 7.

Therefore, the push rod 69 is driven forward and backward by the forward and reverse rotations of the motor 602, and by its forward movement it comes into contact with the throttle valve body 62 to push and move the valve body 62 in the valve closing direction. It returns to a position separated by a predetermined distance, and the pressing force on the valve element 62 is released.

A temperature sensor 603 for detecting the water temperature in the flow passage 71 and outputting an electric signal corresponding to the detected temperature is provided at an appropriate position of the flow passage 71 in the elbow joint 7. The sensor 603 is a control unit 60 installed at an appropriate position of the tank device.
Connected to 4.

The control unit 604 controls the operation of the motor 602 which drives the worm wheel 601, and inputs a detection signal from the sensor 603 to change the detection temperature of the sensor 603 in a decreasing direction to cause a freezing point. When the temperature becomes equal to or lower than a predetermined temperature in the vicinity, the motor 602 is rotated in a predetermined direction, for example, in the forward direction as much as necessary, and when the temperature changes to an upward direction and becomes higher than the predetermined temperature near the freezing point, the motor 602 is set to It is configured to rotate in the opposite direction to, for example, the negative direction as much as necessary.

Thus, in this embodiment, the throttle valve device 6 has a throttle valve body at normal temperature when the temperature is higher than a predetermined temperature near the freezing point.
62 functions as a constant flow valve that changes the rated flow by moving forward and backward to a position where the spring 67 and the flow pressure balance with the fluctuation of the water pressure applied to its front surface, but the water temperature drops below a predetermined temperature near the freezing point. And the motor 602 is a worm wheel 60
1 operates to rotate 1 in the forward direction to move the push rod 69 forward, and the push rod 69 pushes the throttle valve body 62 in the direction of approaching the throttle valve seat 61 against the biasing force of the spring 67. And the flow rate of water supplied to the ball tap 2 is reduced.

Then, when the water temperature rises to a temperature higher than the predetermined temperature from the state where the flow rate is reduced, the motor 602 operates so as to rotate the worm wheel 601 in the negative direction and retracts the push rod 69. . Therefore, the push rod
The pressing force in the valve closing direction on the throttle valve body 62 by 69 disappears, the throttle valve body 62 returns to the original position where the urging force of the spring 67 and the flowing water pressure balance, and the flow rate of the water supplied to the ball tap 2 is changed to the original value. Recover to the state of.

In the two embodiments described above, the throttle valve device 6 also serves as a constant flow valve when operating at room temperature, but the throttle valve device 6 can be provided separately from the constant flow valve. . An example thereof is shown in FIGS. 10 and 11. Like the second embodiment, the third embodiment is the same as the first embodiment except for the throttle valve device 6.

In this embodiment, a constant flow valve 8 is provided on the elbow joint 7 connecting the ball tap 2 and the water supply connecting pipe, and the throttle valve device 6 is connected to the constant flow valve 8 on the upstream side of the constant flow valve 8. Separately, it is provided in the joint 7 '. The throttle valve device 6 includes an on-off valve 6a including an on-off valve seat 605 and an on-off valve body 606 corresponding to the valve seat 605, and this on-off valve.
The on-off valve 6a in the illustrated example supplies electromagnetic force to the electromagnetic coil 608 to generate an electromagnetic force, and uses this electromagnetic force to form a valve body. The temperature sensor 603 is controlled by the control unit 604 so that it is electrically closed when the temperature sensor 603 detects a temperature below a predetermined temperature near the freezing point.

Therefore, in the third embodiment, the opening / closing valve 6a of the throttle valve device 6 is opened at room temperature, which is higher than a predetermined temperature near the freezing point, as shown in FIG. And is supplied to the ball tap 2 through both the bypass flow path 607. Then, in this state, the constant flow valve 8 moves back and forth to a position where the flow pressure balances with the spring 82 as the water pressure applied to the front surface of the valve body 81 fluctuates, thereby adjusting the amount of water supplied to the ball tap 2 to a constant flow rate. To do. On the other hand, if the water temperature falls below a certain temperature near the freezing point and the temperature sensor 603 detects it,
As shown in FIG. 5, the on-off valve 6a is closed, so that only a small amount of water passing through the bypass flow passage 607 is supplied to the ball tap 2.

In each of the above-described embodiments, both the antifreezing discharge device and the throttle valve device are configured to operate automatically in response to a temperature below a predetermined temperature near the freezing point. It is also possible to employ a structure that is manually operated.

FIGS. 12 and 13 show a fourth embodiment, which is a special one for draining the water in the tank 1 at a small flow rate as in each of the embodiments described so far. It has no structure. Of course, this embodiment also includes the throttle valve device 6, and the throttle valve device 6 is configured to automatically throttle the flow rate at a temperature below the predetermined temperature set near the freezing point as in the above-mentioned embodiments. However, it is characterized in that the ball tap 2 includes a forced valve opening means 28 for forcibly opening the main valve 2a. The ball tap 2 is basically the same as the structure of the diaphragm type ball tap described in the first embodiment except that the forced valve opening means 28 is provided.

The forced valve opening means 28 is composed of a compression spring 28a and a compression bias spring 28b which are formed of a shape memory alloy in a coil shape.
When the temperature condition is equal to or lower than a predetermined temperature set near the freezing point, the compression spring 28a made of the shape memory alloy is formed.
The spring force of the compression bias spring 28b disappears, and the compression bias spring 28b generates a compression spring force with respect to the main valve body 23. It is installed.

Therefore, in the ball tap 2, the water level in the tank 1 is lowered, the position of the float 26 is lowered, and the pilot valve
Even if 2b does not open, if the water temperature falls and the temperature becomes lower than the predetermined temperature set near the freezing point, the spring force of the shape-memory alloy compression spring 28 of the forced valve opening means 28 disappears and the compression bias. The main valve body 23 is pushed up by the spring force of the spring 28ba, and the main valve 2a opens. This valve open state continues until the temperature rises to a temperature higher than the above predetermined temperature, and when the temperature rises above the above predetermined temperature, both compression springs 28a, 28b of the forced valve opening means 28 exert their spring forces. The main valve 2a is closed to cancel each other and perform the original operation of the diaphragm type ball tap.

In this embodiment, therefore, even if the water level in the tank 1 does not drop, the water supply from the ball tap 2 is started under the temperature condition below the predetermined temperature set near the freezing point, and the predetermined temperature near the freezing point is reached. Water supply is continued until it recovers above the temperature. Since the throttle valve device 6 also operates to throttle the flow rate almost in synchronization with the opening of the main valve 2a of the ball tap 2, the water supply from the ball tap 2 at this time is restricted to a small flow rate.

On the other hand, the water level in the tank 1 naturally rises due to the water supply from the ball tap 2, but the water exceeding the overflow water level is discharged from the overflow water discharging means 302 such as an overflow pipe to the outside of the tank 1 to the toilet A. Shed Therefore, if the throttle valve device 6 is configured so that the flow rate of the water supply at the time of the throttle operation is restricted to be equal to or less than the drainage capacity of the overflow water discharge means 302, the water level becomes constant at the overflow line, and the water level does not rise and fall. Also in this embodiment, water can be flowed to prevent freezing without frequent opening and closing of the main valve 2a of the ball tap 2.

The forced valve opening means 28 is composed of a tension spring and a tension bias spring which are formed of a shape memory alloy in a coil shape, and when the temperature condition falls below a predetermined temperature set near the freezing point, the above shape memory alloy is used. The spring force of the tension spring made of steel disappears, and the spring force of the tension bias spring causes the tension spring force to act on the main valve body 23, so that the spring of the above embodiment can be urged in the valve opening direction. Opposite to the arrangement of the spring 28a and the spring 28b, they may be mounted before and after the main valve body 23.

As the forced valve opening means 28, the main valve 2a of the ball tap 2 is automatically operated at a temperature below a predetermined temperature near the freezing point.
Ball tap 2
It is also possible to manually perform the forced opening of the main valve 2a.

[0060]

According to the toilet bowl cleaning tank device of claim 1, in the toilet bowl cleaning tank device, which constantly flows a small amount of water at a freezing temperature to prevent freezing, the flow rate to the flow path upstream of the valve portion of the ball tap. Since a throttle valve device that throttles
By restricting the flow rate with the throttle valve device at the time of freeze prevention, even if a diaphragm type ball tap is used, it is possible to control the flow rate so that a small flow rate is supplied at the time of freeze prevention in contrast to the large flow rate supply at normal temperature operation. . Therefore, when freezing is prevented, the time required for the water level in the tank to recover to the water level at which the ball taps are stopped is increased, and the opening and closing intervals of the ball taps are increased to reduce the frequency of water shocks associated with opening and closing the device itself. In particular, the durability of the diaphragm itself of the ball tap can be ensured, and the adverse effect of water impact on the equipment of the same piping system can be reduced. Therefore, in the toilet bowl cleaning tank device using the diaphragm type ball tap, it is possible to realize a system for preventing freezing by flowing water.

In the toilet bowl cleaning tank device according to the second aspect of the present invention, the freezing prevention discharge device and the throttle valve device are adapted to operate automatically in response to temperatures below a predetermined temperature set near the freezing point. It is not necessary to bother to operate the antifreezing discharging device and the throttle valve device for antifreezing, and the antifreezing operation can be reliably performed.

In the toilet bowl cleaning tank device of claim 3, since the throttle valve device restricts the water supply amount to the drainage amount of the antifreezing discharge device or less, the water level in the tank during the antifreezing operation returns to the water stop level of the ball tap. Therefore, the ball tap remains open and does not close during the freeze prevention operation, so that no water impact occurs. In particular, if the throttle valve device restricts the amount of water supply to approximately the same amount as the drainage amount of the antifreeze drainage device, the water level in the tank during freeze protection will be approximately constant unless drainage is performed by the wash water drainage device. It is maintained and can accommodate at least one toilet flush. Further, as described in claim 2, since the antifreezing discharge device and the throttle valve device respectively operate when the temperature becomes lower than a predetermined temperature near the freezing point, a small amount of drainage by the antifreezing discharge device and a small amount of water supply from the ball tap are almost simultaneously performed. Once started, the water level in the tank is maintained at a water level close to the water stop level of the ball tap, and it is possible to supply necessary and sufficient cleaning water for the above cleaning. Since the antifreezing operation is mainly performed at night when the toilet bowl is rarely used, it is sufficiently convenient to be able to handle a single toilet flush.

Since the toilet bowl cleaning tank device of claim 4 is provided with the forced opening means for forcibly opening the valve of the ball tap, the water supplied from the ball tap can be supplied without draining the water in the tank to lower the water level. By discharging the water equivalent to the supplied water from the overflow water discharge device such as the overflow pipe, the water can be flowed to prevent freezing, and the ball tap is opened during the antifreezing operation. Since the valve state is maintained and the valve does not close, no water impact occurs. Therefore, the same effect can be achieved without providing a freezing prevention discharge device such as the tank device of the first aspect.

In addition to the effect of the toilet bowl cleaning tank of claim 4, the toilet bowl cleaning tank device of claim 5 can also achieve the effect of claim 2.

In the toilet bowl cleaning tank device of the sixth aspect, since the throttle valve device restricts the amount of water supply to be equal to or less than the discharge capacity of the overflow water discharging means of the tank, there is no possibility that water will overflow from the tank, and of course the inside of the tank. The water level of the toilet is always on the overflow line, and even if there is drainage from the flush water drainage device, the water level returns to the overflow line any number of times, so no matter how many times the toilet is used during antifreeze operation Can be washed.

In the toilet bowl cleaning tank device of claim 7, the valve element is closed in the valve closing direction by the deformation of the drive element made of the shape memory material which deforms the throttle valve device in response to a temperature below a predetermined temperature set near the freezing point. And a first compression spring for urging the throttle valve device in a direction to open the valve body of the toilet flushing / draining device according to claim 8 or 9.
A second compression bias spring for urging the valve element in the valve closing direction is provided, and the first compression spring is provided with a spring force at a temperature equal to or lower than a predetermined temperature set near the freezing point by the shape memory alloy. At a temperature below a predetermined temperature set near the freezing point, the first spring is composed of a tension bias spring and the second spring is composed of a shape memory alloy tension spring. Since the spring force is eliminated, the throttle valve device can have a simple and compact structure, and the overall size of the toilet bowl cleaning tank device is not increased.

According to the tenth aspect of the present invention, in the toilet bowl cleaning tank device, the operation of the throttle valve device is electrically controlled based on the temperature detection of the temperature sensor, and the throttle valve is operated at a temperature equal to or lower than the predetermined temperature set near the freezing point. Since it is throttled, it is relatively easy to set the operating temperature and the throttle amount of the throttle valve, and the secular change is small.

In the toilet bowl cleaning tank device of claim 11, since the throttle valve device also serves as a constant flow valve at room temperature, it is possible to avoid an increase in the size of the device due to the provision of the throttle valve device, and increase the cost. It can be kept to a minimum.

[Brief description of the drawings]

FIG. 1 is a sectional view of a toilet bowl cleaning tank device showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a ball tap portion and a throttle valve device portion, showing a non-cleaning state at room temperature.

FIG. 3 is a partial cross-sectional view taken along the line (3)-(3) of FIG.

FIG. 4 is a sectional view of a ball tap portion and a throttle valve device portion, showing a state at the time of antifreezing operation.

FIG. 5 is a sectional view taken along line (5)-(5) of FIG. 4;

FIG. 6 is an enlarged cross-sectional view of the anti-freezing discharge device showing a state at room temperature.

FIG. 7 is an enlarged cross-sectional view of the anti-icing discharge device, showing a state during anti-freezing operation.

FIG. 8 is an enlarged sectional view of a ball tap portion and a throttle valve device portion showing a second embodiment, showing a state at the time of cleaning operation at room temperature.

FIG. 9 is an enlarged sectional view of the ball tap portion and the throttle valve device portion, showing a state at the time of antifreezing operation.

FIG. 10 is an enlarged cross-sectional view of a ball tap portion and a throttle valve device portion showing a third embodiment, showing a state at the time of cleaning operation at room temperature.

FIG. 11 is an enlarged cross-sectional view of the ball tap portion and the throttle valve device portion, showing a state at the time of antifreezing operation.

FIG. 12 is an enlarged cross-sectional view of a ball tap portion and a throttle valve device portion showing a fourth embodiment, showing a state at the time of non-cleaning operation at room temperature.

FIG. 13 is an enlarged cross-sectional view of the ball tap portion and the throttle valve device portion, showing a state at the time of antifreezing operation.

[Explanation of symbols]

A: Toilet bowl 1: Tank 2: Ball tap 2a: Main valve of ball tap 3: Wash water drainage device 3a: Drain valve of wash water drainage device 4: Discharge device for freeze prevention 6: Throttle valve device 28: Forced valve opening device 63: 1st compression spring 64: 2nd compression bias spring 602: Drive part 603: Sensor 604: Control part

Claims (11)

[Claims] 1. In a toilet bowl cleaning tank device using a diaphragm type ball tap, in addition to a flush water draining device for draining water in the tank for toilet bowl cleaning, a valve is opened to flow the water in the tank to the toilet bowl at a small flow rate. A toilet bowl cleaning tank device, characterized in that a freezing prevention discharge device is provided in the tank body, and a throttle valve device is provided in the flow path upstream of the valve portion of the ball tap. 2. An antifreezing discharge device is configured to automatically open a valve in response to a temperature below a predetermined temperature set near the freezing point, and the throttle valve device has a temperature below the predetermined temperature. 2. The toilet bowl cleaning tank device according to claim 1, wherein the flow rate is automatically reduced in response to the above. 3. The toilet bowl cleaning tank device according to claim 1, wherein the throttle valve device restricts the amount of water supply to be equal to or less than the amount of drainage of the discharge device for freeze prevention. 4. In a toilet bowl cleaning tank device using a diaphragm type ball tap, forcible valve opening means for forcibly opening the main valve of the ball tap is provided, and a throttle valve device is provided in the flow path upstream of the valve portion of the ball tap. A toilet bowl cleaning tank device characterized by being provided. 5. The forced valve opening means is configured to automatically operate in response to a temperature equal to or lower than a predetermined temperature set near the freezing point to open the valve of the ball tap, and the throttle valve device is provided with the predetermined valve. The toilet bowl cleaning tank device according to claim 4, wherein the flow rate is automatically reduced in response to a temperature equal to or lower than a temperature. 6. The toilet bowl cleaning tank device according to claim 4 or 5, wherein the throttle valve device restricts the amount of water supply to be equal to or less than the discharge capacity of the overflow water discharge means of the tank. 7. A throttle valve device is provided with a drive element made of a shape memory material, which is deformed in response to a temperature below a predetermined temperature set near the freezing point, and the valve element is closed in a valve closing direction by the deformation of the drive element. The toilet bowl cleaning tank device according to any one of claims 1 to 6, wherein the toilet flushing tank device is driven by the valve to reduce the flow rate. 8. A throttle valve device comprises a first compression spring for urging the valve body in a direction to open the valve body, and a second compression bias spring for urging the valve body in a valve closing direction. 8. The toilet bowl according to any one of claims 1 to 7, wherein the compression spring 1 is configured to eliminate the spring force at a temperature equal to or lower than a predetermined temperature set near the freezing point by a shape memory alloy. Cleaning tank device. 9. A throttle valve device comprising a first tension bias spring for urging the valve body in a valve closing direction, and a second tension spring for urging the valve body in a valve opening direction. 8. The toilet bowl according to any one of claims 1 to 7, wherein the tension spring of No. 2 is configured to eliminate the spring force at a temperature equal to or lower than a predetermined temperature set near the freezing point by a shape memory alloy. Cleaning tank device. The throttle valve device controls the throttle valve drive unit based on an electrically operated throttle valve, a sensor that detects water temperature, and the temperature detected by the sensor, and the sensor is set to a predetermined temperature near the freezing point. The toilet bowl cleaning tank device according to any one of claims 1 to 6, further comprising: a control unit that drives a valve body of the throttle valve in a valve closing direction to throttle the flow rate when a temperature lower than the temperature is detected. 11. The toilet bowl cleaning tank device according to claim 1, wherein the throttle valve device also serves as a constant flow valve at room temperature.