Abstract:
A water-spraying toilet comprising a toilet, a toilet opening ( 2 ) neighboring the toilet pipe, and a piston ( 1 ) that seals with the toilet opening ( 2 ). The piston ( 1 ) can seal and open the toilet opening ( 2 ). The lower portion of the toilet opening ( 2 ) is provided with a relatively large toilet pipe. The piston ( 1 ) can rotate within the relatively large toilet pipe. The urination, feces, and flushed water on the piston ( 1 ) can flow down through the space between the piston ( 1 ) and the pipeline. The piston ( 1 ) can also move vertically. The toilet does not have excrement back flow, and the sewage is hard to block.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to washrooms at home and other places, as well as sitting toilets, squatting toilets used in transportation vehicles such as trains, steamers, airplanes, automobiles, etc. 
       BACKGROUND OF THE INVENTION 
       [0002]    Most of the sitting toilets and squat toilets used by modern urban families and public washrooms are of flushing type, which leads to huge consumption of water and squandering of precious resources. In addition, because of the water-sealed joints in these toilets, there are always remainder-water in the commodes, which may be stirred up and splash one in defecating. Sometimes, when these commodes haven&#39;t been cleaned up, excrements may be returned upward. And in winter water-sealed joints of commodes in public washrooms are apt to be frozen. Moreover, because quite a number of people do not flush after defecating, drains easily get congested. And this definitely has an adverse impact on public hygiene. On the other hand, modern rural washrooms, as many of them are old-fashioned open style no-flush washrooms, often make one feel uncomfortable, and hence cannot meet the needs of modern life. In all, these are attributable to the huge water consumption of modern flushing commodes, as well as lack of drains and sewage disposal facilities in rural areas. What&#39;s more, the huge water consumption of household and public washrooms makes it more difficult to recycle and reutilize water and excrements. 
       SUMMARY OF THE INVENTION 
       [0003]    The present invention pertains to a water-saving and hygienic automatic commode that is unlikely to get congested. 
         [0004]    The commode of the present invention may significantly relieve problems such as squandering of water resourcing as a result of commodes flushing, being difficult or costly to maintain the hygiene conditions of public places, drains being easily get congested, etc, and may reduce the workload associated with utilizing or processing excrements and flushing water. 
         [0005]    The piston of the present commode directly seals the commode opening, which is different from sealing the commode channel by water. When the commode is flushing water, the piston can move downward along with water spraying nested axle tubes and rotate, which produces relatively small flushing water streams, hence may save a lot of water, and the commode may be cleaned more effectively. As the commode channel is relatively large, and there is no water-sealed joint in the commode, the commode does not return excrements. As a result, it is not easy for drains to get congested. In the present commode, since a piston is disposed adjacent to the commode opening to separate the outer space from the drains system, a better airtight seal may be achieved than the traditional way of using a water-sealed joint for storing water so as to seal disagreeable smells. Moreover, the present commode proves to be more water-saving and be conducive to maintaining a more hygienic environment. 
         [0006]    The present invention, as it makes use of the gravity of the human body to produce a driving force, saves a power source control system, thereby making the application of the commode more flexible, its performance more stable, and effectively reducing associated costs. As a result of the gravity effect, after defecating, the commode automatically flushes. This eliminates the drawback of no cleaning after defecating in public washrooms. Thus, public hygiene will be enhanced and cleaning workload will be reduced. 
         [0007]    Since there is no water-sealed joint in the present commode, there will be no remainder-water in the commode. As a result, no splashing will occur in defecating. Also, the present commode will not be so heavily influenced by the low temperature in winter. 
         [0008]    Meanwhile, for recycling and utilizing human excrements, as the water content of the excrements are significantly reduced, environmental sanitation workload is reduced and the quality of the excrements is enhanced as a consequence. 
         [0009]    For the purpose of flushing or regularly cleaning the present commode, water steam or other types of high pressure gases may be used, and this helps further save water. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is a schematic diagram of the present commode structure in a still state. 
           [0011]      FIG. 2  is a schematic diagram of the present commode structure illustrating its water replenishment, flushing, and gravity conversion. 
           [0012]      FIG. 3  is a schematic diagram of the present commode&#39;s water flushing (air flushing) system. 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0013]    In the following, the operation of the present commode from before defecating to after defecating will be described as a specific embodiment. 
         [0014]    When there is no one sitting on the commode, the piston ( 1 ) is in a still state and seals the commode opening ( 2 ). Within the commode channel connected with the piston, the cylinder ( 5 ), as well as two water spraying pipes ( 13 ,  19 ) of the commode are in a still state, too. The valve ( 41 ) on the main pipe ( 14 ) of the commode&#39;s water flushing (air flushing) system is opened. The valve ( 40 ) on the tap-water pipe ( 28 ) closes the channel between the tap-water pipe and the water inlet pipe ( 32 ), and opens the channel between the tap-water pipe and water inlet pipe ( 27 ) of the water flushing system&#39;s cylinder ( 43 ). The valve ( 40 ) is capable of concurrently controlling the two pipes ( 32 ,  27 ). The valve ( 42 ) on the water outlet pipe ( 44 ) of the water flushing system&#39;s cylinder is closed. The commode&#39;s elastic water-storing hose ( 36 ) is in a naturally contracted state. The spring ( 35 ) between the water flushing system&#39;s water tank ( 38 ) and the water inlet pipe is in a state of being compressed by the hose, and has a potential energy. A check valve of upward type ( 31 ) is disposed on the water inlet pipe. A part of the water inlet pipe outside the water tank has certain elasticity, which ensures that the water inlet pipe within the water tank can move outward. The piston ( 30 ) within the water flushing system&#39;s cylinder ( 43 ) is in a lower end position within the cylinder. The springs ( 29 ) on the two sides of the cylinder are in a natural state of having no potential energy. 
         [0015]    When someone is defecating, the human body&#39;s gravity makes the commode&#39;s large gravity conducting pole ( 23 ) move towards the bottom of the conducting pole trough ( 34 ), and drives the gravity-conducting pull wire ( 25 ) to move. The piston&#39;s pull rod ( 26 ) connected with the pull wire ( 25 ) makes the piston ( 30 ) within the water flushing system&#39;s cylinder move towards the top of the cylinder. And the springs ( 29 ) on the two sides of the cylinder are stretched. 
         [0016]    Meanwhile, the commode&#39;s small gravity conducting pole ( 46 ) quickly moves towards the bottom of the conducting pole trough ( 47 ). This drives the pull wire ( 48 ) to further drive two pull wires ( 39 ,  45 ) through a force conversion axle ( 49 ) to move quickly. These two pull wires respectively controls valve ( 40 ), valve ( 42 ), and valve ( 41 ). Because of the two pull wires&#39; fast movement, the valve ( 40 ) on the tap-water pipe ( 28 ) opens the channel between the tap-water pipe and the water inlet pipe ( 32 ), and closes the channel between the tap-water pipe and the water inlet pipe ( 27 ) of the water flushing system&#39;s cylinder ( 43 ). The valve ( 41 ) on the main pipe ( 14 ) of the water flushing (air flushing) system is closed. The valve ( 42 ) on the water outlet pipe ( 44 ) of the water flushing system&#39;s cylinder is opened. Fixed outer sheaths are disposed for the pull wires. 
         [0017]    When one is in defecating, the piston ( 30 ) within the cylinder of the commode&#39;s water flushing system moves toward the top of the cylinder ( 43 ). The valve on the water outlet pipe of the cylinder is opened, thus the water within the cylinder goes out. The maximum water discharging volume, as is controlled by the distance the piston ( 30 ) moves upward, equals to the maximum water spraying volume of the water flushing system&#39;s elastic hose ( 36 ). The tap water is added into the commode&#39;s high temperature resistant and elastic hose ( 36 ) through pipe ( 28 ). The tap water pressure is greater than the hose&#39;s elastic force. As a result, water begins to flow into the hose and the latter expands. The two ends of the hose are respectively fixed to the inlet and outlet pipes within the hermetic water tank ( 38 ).The inlet and outlet pipe ends within the hose are nested with each other. The space between these two nested pipes is relatively large, with the hose&#39;s inlets and outlets ( 37 ) being disposed upon the pipes. The water outlet pipe is fixed to the water tank, while the water inlet pipe can move forward and backward within the water bank. As the potential energy of the spring ( 35 ) between the water inlet pipe and the water tank is greater than the friction force between them at the time of the water inlet pipe moving left and right within the water bank, after the hose is expanded as a result of the water flowing into it, the water inlet pipe moves left. 
         [0018]    The maximum distance that the water inlet pipe moving left can travel to is the hose&#39;s maximum expanded safe length without explosion, and also the distance for the spring ( 35 ) restores to its natural still state without potential energy. The height of the water tank between its top and bottom parts is less than the hose&#39;s maximum safe expansion diameter, so as to ensure that the hose will not be broken because of excessive water flowing into it. 
         [0019]    In defecating, water replenishment for the water flushing system is completed. 
         [0020]    After one leaves, the downward pressure of the commode&#39;s small gravity conducting pole ( 46 ) quickly disappears, which makes the small conducting pole quickly returns to its initial position. As a result, the springs inside the valves ( 40 ,  41 ,  42 ) on the pipes of the water flushing system quickly restore to their initial statuses. Specifically, the valve ( 40 ) on the tap-water pipe closes the tap-water&#39;s channel to the hose, and opens the tap-water&#39;s channel to the pipe of the cylinder. Also, the valve ( 42 ) on the water outlet pipe of the cylinder is closed, and the valve ( 41 ) on the water outlet pipe of the hose is opened. As such, inside the hose of the water flushing system the water with potential energy sprays out through the water outlet pipe ( 14 ). 
         [0021]    In the meantime, the downward pressure of the commode&#39;s large gravity conducting pole( 33 ) quickly disappears, which makes the large conducting pole along with the piston&#39;s pull rod ( 26 ) of the water flushing system begin to return to their initial positions. The piston&#39;s pull bar within the water flushing system&#39;s cylinder is pulled downward by the restoring forces of the two springs ( 29 ). Further, the piston ( 30 ) is subject to the downward pressure as exerted by the tap-water. The restoring forces of the springs and the tap-water pressure as sustained by the piston are conducted by the water between the water bank and the cylinder to the water within the hose ( 36 ). And this conducted pressure further adds to the water discharging pressure of the water outlet pipe ( 14 ). 
         [0022]    The water within the water outlet pipe ( 14 ) quickly arrives at the hermetic water bank ( 18 ). Within the water bank there is disposed a rotatable water spraying axle tube ( 13 ). The lower opening of the axle tube is inside the water tank. Water quickly enters into the axle tube through this opening, and arrives at the water outlet ( 20 ) of the axle tube. In addition to the axle tube ( 13 ) there is disposed another water spraying axle tube ( 19 ). These two water spraying axle tubes form a nested water spraying axle tube structure. The spraying opening ( 20 ) is the opening of the upper end of the inner axle tube ( 13 ) that extends outside of the outer wall of the outer axle tube ( 19 ). The water entering into the axle tube ( 13 ) will not enter into the space between the two axle tubes. Pistons ( 22 ,  6 ) are respectively disposed above and below the water outlet ( 20 ). The piston ( 22 ) is fixed to the axle tube ( 19 ), and can move up and down along with the axle tube ( 19 ) relative to the cylinder ( 5 ) inside the commode channel. The piston ( 6 ) is fixed to the inner wall of the cylinder ( 5 ), and can move on the outer wall of the axle tube ( 19 ) along with the cylinder ( 5 ). After water enters into the cylinder ( 5 ) from the water outlet ( 20 ), the water pressure will cause the cylinder ( 5 ) to move downward in a specified vertical direction, and arrive at a specified location. 
         [0023]    The cylinder ( 5 ) is connected to the commode&#39;s piston ( 1 ). Therefore, the cylinder will cause the piston to move downward with it and arrive at a specified location. 
         [0024]    On the lower end of the piston ( 6 ) there is disposed a spring ( 21 ). On the lower end of the spring there is disposed a spring support ( 7 ), which is also another spring. This spring is fixed to the axle tube ( 19 ), and can move along with the axle tube ( 19 ) up and down relative to the cylinder ( 5 ). The spring ( 7 ) has a protrusion. On the cylinder ( 5 ) there is a recess corresponding to the protrusion, the distance of the recess being equal to the distance the cylinder ( 5 ) moving downward as a result of water pressure. This makes the piston ( 7 ) keep sealing the cylinder ( 5 ), and prevents a relative rotation between them. To prevent the piston from rotating relative to the cylinder, the protrusion and the recess can be cancelled. Instead, the axle tube ( 19 ) and the cylinder ( 5 ) can be configured into non-cylindrical hermetic structures sealed by pistons. 
         [0025]    After the commode&#39;s cylinder ( 5 ) moves downward and arrives at a specified location, the cylinder&#39;s bottom seal ( 11 ) separates from the top seal ( 8 ) of the commode&#39;s stabilizing sealed tube ( 10 ). There is a stabilizing bearing ( 9 ) between the stabilizing sealed tube ( 10 ) and the outer wall of the water spraying tube ( 19 ). 
         [0026]    A small spout hole ( 23 ) is disposed on the outer wall of the cylinder ( 5 ). The spout hole is far smaller than the water outlet ( 20 ). The cylinder quickly moves down as a result of water pressure and arrives at the specified location, and water flushes from the spout hole ( 23 ) toward the inner wall of the commode channel via the dashed lines. The water pressure within the cylinder and the water pressure within the water spraying tube ( 13 ) quickly increase. When they reach the pressure of the adjustable pressure valve ( 16 ) on the pipe ( 17 ) outside of the water tank ( 18 ), water arrives at the pump chamber ( 15 ) through the pipe ( 17 ). In the pump chamber, the water flow first runs toward an impeller, which is fixed to the outer wall of the water spraying axle tube ( 13 ), and makes the impeller rotate. As such, the water flow drives the nested water flushing axle tubes and the cylinder ( 5 ) to rotate. The cylinder ( 5 ) in turn drives the piston ( 1 ) to rotate. The water flow reaches a location above the impeller. The lower opening of the axle tube ( 19 ) is in a pump chamber above the impeller. The water flow quickly enters into the nested water spraying tubes through the lower opening, and arrives at the portion of the axle tube ( 19 ) above the piston. The water quickly sprays out from the spout hole( 23 ) on the upper part of the axle tube. Meanwhile, the water flow quickly enters into the commode body&#39;s water spraying pipe ( 12 ) outside of the pump chamber, and quickly sprays out through the commode body&#39;s spout hole. 
         [0027]    At this time, high pressure water flows from spout holes of the commode body and the commode opening run toward the umbrella-like structure ( 3 ) on the top of the commode&#39;s rotating water spraying axle tube, the commode&#39;s piston ( 1 ), the portion of the commode&#39;s axle tube ( 19 ) above the piston ( 1 ), the cylinder ( 5 ) within the commode channel, and the top of the commode channel. The spout hole on the portion of the commode&#39;s rotating axle tube above the piston ( 1 ), and the spout hole on the cylinder ( 5 ) spray out high pressure water flows to the commode channel, so as to clean the commode. 
         [0028]    Once the water within the hose ( 36 ) of the water flushing system is used up by spraying, cleaning of the commode is completed. 
         [0029]    After the water within the hose is used up by spraying, the impeller of the commode&#39;s pump chamber and the water spraying axle tubes cease to rotate, and the water pressure between the cylinder ( 5 )&#39;s pistons ( 22 , 6 ) disappears. The cylinder ( 5 ) and the piston ( 1 ), subject to the restoring force of the spring ( 21 ), as well as the air pressure of the hermetic container where the spring resides, quickly move upward till the piston arrives at the commode opening ( 2 ). The piston ( 1 ) is tightly sealed at the opening ( 2 ) of the commode channel, by the elastic force of the spring ( 21 ) and the air pressure of the hermetic container where the spring resides, and is kept still. The cylinder ( 5 ) within the commode channel, which is connected to the piston, is also in a still state. As a result of the elastic force of the spring ( 21 ) and the air pressure, inside the commode the top seal ( 8 ) of the stabilizing sealed tube ( 10 ) and the bottom seal ( 11 ) of the cylinder ( 5 ) are tightly sealed together, which makes the airs inside and outside the commode channel separate from each other, thus achieves a hermetic sealing. 
         [0030]    The commode&#39;s elastic water storing hose ( 36 ) is in a naturally contracted status. The spring ( 35 ) between the water flushing system&#39;s water tank ( 38 ) and the water inlet pipe is in a status of being compressed by the restoring force of the hose and having a potential energy. The piston ( 30 ) within the water flushing system&#39;s cylinder ( 43 ) is at a lower end location within the cylinder. The springs ( 29 ) on the two sides are at a natural status of having no potential energy. 
         [0031]    When the commode needs to be cleaned by gas, the tap-water inlet pipe of the commode can be supplied with gas. Then the commode is subject to gravity. Thereafter the gravity is cancelled. In this way the commode can be cleaned by gas. 
         [0032]    The water flushing system of the commode may adopt a second structure as follows. 
       DESCRIPTION OF THE DRAWINGS 
       [0033]      FIG. 4  is a schematic diagram of the present commode&#39;s water flushing system. 
       SPECIFIC EMBODIMENTS 
       [0034]    At the time of the pressure conducting plate ( 1 ) being subject to a downward force, the pressure conducting tube ( 3 ) connected to the pressure conducting plate moves downward, and its lower end penetrates a stabilizing balance plate ( 6 ). The pressure conducting tube ( 3 ) is nested with another pressure conducting tube ( 4 ) outside of it. These two tubes can move to and fro within a specified range. When the upper end of the pressure conducting tube arrives at the top of the pressure conducting tube ( 4 ), the pressure conducting tube moves downward as a result of the force exerted on it, and its end also penetrates the stabilizing balance plate ( 6 ). The pressure conducting tube ( 4 ) is nested with another fixed tube ( 5 ). When the upper end of the pressure conducting tube ( 4 ) arrives at the top of the fixed tube, the pressure conducting plate reaches its maximum downward travel distance. At this time, the spring ( 2 ) outside of the lower ends of these two pressure conducting tubes are compressed. 
         [0035]    Between the upper and lower pressure conducting tubes and the fixed tube ( 5 ), by properly increasing the gap, or adding balls, flexibility in expansion and contraction between them can be enhanced. 
         [0036]    The portion of the pressure conducting tube penetrating the stabilizing balance plate has some breach on it. Each section of the stabilizing balance plate, inside or outside of the two pressure conducting tubes, penetrates the breach, and remain connected as an integral. 
         [0037]    A pull wire ( 7 ) on the inner wall of the lower end of the upper pressure conducting tube ( 3 ) is connected to the valves on the water (gas, steam)inlet and outlet pipes of a pressurization cylinder ( 20 ). When the upper pressure conducting tube ( 3 ) moves downward, and arrives at a location which makes the lower pressure conducting tube sustain a force, the pull wire ( 7 ) completes a pre-specified control of the cylinder valves. Valve ( 11 ) opens the water (gas, steam) inlet pipe ( 12 ) and the water (gas, steam) inlet pipe ( 13 ) below the cylinder, and closes the water (gas, steam)inlet pipe ( 12 ) and the water (gas, steam) inlet pipe ( 14 ) above the cylinder. The valve ( 19 ) opens the water discharging pipe ( 15 ) of the cylinder. The valve ( 10 ) closes the water spraying pipe ( 10 ) of the cylinder. 
         [0038]    A pull wire ( 8 ) on the outer wall of the lower end of the lower pressure conducting tube ( 3 ) is connected to a pull rod ( 17 ) of the piston ( 18 ) within the pressurization cylinder ( 20 ). When the upper and lower pressure conducting tubes ( 3 , 4 ) both move downward, water (gas, steam) with a constant pressure enters into the lower end of the cylinder through a pipe, and push the piston ( 18 ) to move upward. In the meantime, the pull wire connected with the pull rod ( 17 ) pulls the piston ( 18 ) to move upward. As a result of the upward movement of the piston, the water (gas, steam) above the piston within the cylinder is discharged through the water discharging pipe ( 15 ). And the spring ( 19 ) between the cylinder and the pull rod is stretched out because of a force exerted on it. 
         [0039]    When the upper and lower pressure conducting tubes ( 3 ,  4 ) move down to a maximum travel distance, the water (gas, steam) above the piston within the cylinder is fully discharged out. The portion of the cylinder below the piston reaches a maximum inlet water (gas, steam) volume. The spring ( 19 ) has a restoring force which pushes the spring down. 
         [0040]    When the pressure sustained by the pressure conducting plate disappears, as a result of the restoring force of the spring ( 2 ) outside of it, the upper pressure conducting plate ( 3 ) quickly moves upward to restore to its initial status, which drives the pull wire ( 7 ) to enable the valves on the pipes of the cylinder to quickly complete the pre-specified control. Valve ( 11 ) closes the water (gas, steam) inlet pipe ( 12 ) and the water (gas, steam) inlet pipe ( 13 ) below the cylinder, opens the water (gas, steam) inlet pipe ( 12 ) and the water (gas, steam) inlet pipe ( 14 ) above the cylinder. Valve ( 9 ) closes the water discharging pipe ( 15 ) of the cylinder. Valve ( 10 ) opens the water spraying pipe ( 16 ) of the cylinder. Meanwhile, the lower pressure conducting tube ( 4 ) moves upward to its initial status as well. The pull rod of the cylinder&#39;s piston no longer sustains a downward force from the lower pressure conducting tube ( 4 ). The piston moves upward as a result of the restoring force of the spring ( 19 ), plus a downward pressure conducted to it, by the water (gas, steam) which comes from the pipe ( 12 ) and has a constant pressure. The water (gas, steam) under the piston is discharged out through the water spraying pipe ( 16 ) by the pressure conducted by the piston, thereby completing one cycle of intermittent cleaning. 
         [0041]    When the pressure conducting plate is subject to a force again, the apparatus will work intermittently using an approach same as aforesaid. 
         [0042]    According to different needs of production and daily life, the medium (working substance) entering into the apparatus&#39;s cylinder and doing the job can be liquids other than water. And the apparatus may adopt multiple sets of pressure conducting tubes and cylinders.