Suction-type toilet

Abstract

A suction-type toilet (100), comprising a toilet bowl (10), the toilet bowl (10) being provided with a first spray washing opening (101), a second spray washing opening (102), and a sewage outlet connected to a suction device (12). The toilet has a plurality of flushing modes, including at least one of a first flushing mode and a second flushing mode, and further including a third flushing mode.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the field of sanitary ware, and particularly relates to, but is not limited to, a suction-type toilet.Background

[0002] Flush toilets are a major contributor to a clean and healthy environment, and one of major drawbacks of flush toilets is long-term water usage. In the context of limited water resources and water supply interruptions caused by droughts or floods, better water-saving capacities of flush toilets need to be solved urgently.

[0003] Better water-saving capabilities of flush toilets are urgent in both developing and developed countries, because in the developed countries there is competition among needs of industrial water, agricultural water, cleaning water, and water for personal use. As we all know, treatment of wastewater requires high investment in infrastructure, and the treatment process is costly, and in many cases it is difficult to establish infrastructure for sewer systems and treatment plants.

[0004] A flush toilet usually requires about 6 liters of water per flush of solids and liquids. In some cases, two different flush volumes are used for flushing the toilet, one for treating solids and feces (complete flush), and the other for flushing after a user urinates, i.e. a half flush (or economical flush). It means that when the user uses the toilet to urinate, 3 liters of water will be drained every time the toilet is flushed. The cost of flushing toilets is very high. On the one hand, the wastewater after flushing needs to be treated. On the other hand, investment, operation and maintenance costs of sewer infrastructure also make the cleaning cost of sewers very high.Summary

[0005] The following is a summary of subject matters described in detail herein. This summary is not intended to limit the protection scope of the claims.

[0006] An embodiment of the present disclosure provides a suction-type toilet, including: a toilet bowl provided with a first spray washing opening and a second spray washing opening, and a sewage outlet for connecting with a suction device. The first spray washing opening and the second spray washing opening are both arranged at an upper portion of the toilet bowl, the first spray washing opening is arranged at a front portion of the toilet bowl, and the second spray washing opening is arranged at rear of the first spray washing opening. The toilet has a plurality of flushing modes, the plurality of flushing modes include at least one of a first flushing mode and a second flushing mode, and further include a third flushing mode. In the first flushing mode, the first spray washing opening or the second spray washing opening is configured to replenish the toilet bowl with water after draining; in the second flushing mode, the first spray washing opening is configured to flush the toilet bowl before draining, and the first spray washing opening or the second spray washing opening is configured to replenish the toilet bowl with water after draining the toilet bowl; in the third flushing mode, the first spray washing opening and the second spray washing opening are configured to simultaneously flush the toilet before draining the toilet bowl, and the first spray washing opening or the second spray washing opening is configured to replenish the toilet with water after draining the toilet.

[0007] Other aspects will become apparent after reading and understanding the drawings and detailed description.Brief Description of Drawings

[0008] The accompanying drawings are used to provide further understanding of the technical solutions of the present disclosure, and constitute a part of the specification. They are used to explain the technical solutions of the present application together with the embodiments of the present disclosure and do not constitute a limitation on the technical solutions of the present application. FIG. 1 is a schematic diagram of a suction-type toilet according to an embodiment of the present disclosure. FIG. 2 is a schematic side view of a toilet body of a suction-type toilet according to an embodiment of the present disclosure. FIG. 3 is a schematic top view of a toilet body of a suction-type toilet according to an embodiment of the present disclosure. FIG. 4 is an example diagram of another implementation scheme of a toilet body of a suction-type toilet according to an embodiment of the present disclosure. FIG. 5 is a schematic diagram of integrated installation of a flushing system of a suction-type toilet according to an embodiment of the present disclosure. FIG. 6 is a simplified diagram of an internal tank body after a flushing system of a suction-type toilet according to an embodiment of the present disclosure is integrated and installed. Reference signs:

[0009] 100: suction-type toilet, 1: toilet body, 10: toilet bowl, 11: foundation, 101: first spray washing opening, 102: second spray washing opening, 103: sewage outlet, 1a: front end, 1b: rear end, 104: arc-shaped front portion, 105: arc-shaped rear slope portion, 106: water sealing zone, 105: rear slope portion, 12: suction device, 13: backflow prevention device, 14: flange connector, 130: magnetic attraction element; 2: flushing system, 21: first spray washing pipeline, 22: second spray washing pipeline, 23: on-off assembly, 24: control device, 210: first nozzle, 2101: horizontal section, 2102: bent section, 220: second nozzle, 25: pressurizing device, 23a: first electric control valve, 23b: second electric control valve, 28: tank body, D: box body, 26: first liquid level sensor, 27: second liquid level sensor.Detailed Description

[0010] Technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only part of and not all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skills in the art without making creative efforts fall within the protection scope of the present disclosure.

[0011] In addition, the technical solutions in different embodiments of the present disclosure can be combined with each other, but it needs to be based on the realization by those of ordinary skills in the art. When the combination of the technical solutions is contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist and is not within the protection scope claimed by the present disclosure.

[0012] In the description of the present disclosure, it is to be understood that orientations or position relationships indicated by terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are based on those shown in the drawings, which are only for convenience of describing the present disclosure and simplifying the description and are not intended to indicate or imply that the referred device or element must have a particular orientation, or is constructed and operated in a particular orientation, and therefore cannot be construed as limitations on the present disclosure.

[0013] Furthermore, terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implying the quantity of technical features indicated.

[0014] In the description of the present disclosure, unless otherwise explicitly specified and defined, terms "mount", "connect" and "couple" should be understood in a broad sense. For example, a connection may be a fixed connection or may be a detachable connection, or may be an integral connection; it can be a mechanical connection, or may be an electrical connection, or may be in communication with each other; it may be a direct connection, or an indirect connection through an intermediate medium, or it may be an internal communication between two elements or an interaction between the two elements. For those of ordinary skills in the art, specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0015] In the present disclosure, unless otherwise explicitly specified and defined, a first feature being "above" or "below" a second feature may include direct contact between the first feature and the second feature, or it may also include the first feature and the second feature not being in direct contact but being in contact through other feature(s) between them. Moreover, the first feature being "on", "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that a level of the first feature is higher than that of the second feature. The first feature being "under", "below" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that a level of the first feature is lower than that of the second feature.

[0016] Various different implementations or examples are provided below to implement different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, components and settings of particular examples are described below. It is clear that, they are examples only and are not intended to limit the present disclosure. In addition, in the present disclosure, reference numbers and / or reference letters in different examples may be repeated, and such repetition is for purposes of simplification and clarity, and itself does not indicate a relationship between various implementations and / or settings discussed. In addition, the present disclosure provides examples of various specific processes and materials, but those of ordinary skills in the art may be aware of the application of other processes and / or the use of other materials.

[0017] As shown in FIGS. 1 to 6, an embodiment of the present disclosure provides a suction-type toilet 100, which can be used for a suction-type smart toilet, and can be a sitting toilet or a squatting toilet.

[0018] As shown in FIG. 1, this embodiment will be described in detail with reference to a suction-type sitting toilet 100. The suction-type toilet 100 includes a toilet body 1, and a flushing system 2 installed in cooperation with the toilet body 1.

[0019] As shown in FIGS. 2 and 3, the toilet body 1 includes a toilet bowl 10 and a foundation 11. The toilet bowl 10 is provided with a first spray washing opening 101, a second spray washing opening 10, and a sewage outlet 103. The first spray washing opening 101 and the second spray washing opening 102 are connected to the flushing system 2 through a pipeline, and both are used for cleaning the toilet body 1. The sewage outlet 103 is connected to a sewage system and discharges cleaned excrement in the toilet bowl 10.

[0020] The toilet body 1 includes a front end 1a and a rear end 1b opposite to the front end 1a, and the rear end 1b may be provided corresponding to a mounting surface of a wall. In a front-rear direction of the toilet body 1, the first spray washing opening 101 is disposed at a front portion of the toilet bowl 10, and the second spray washing opening 102 is disposed at the rear of the first spray washing opening 101. In a height direction of the toilet body 1, both the first spray washing opening 101 and the second spray washing opening 102 are located at an upper portion of the toilet bowl 11.

[0021] In an exemplary embodiment, a plurality of first spray washing openings 101 are provided and are arranged along a circumferential direction of the toilet bowl 10. A plurality of second spray washing openings 102 are provided and arranged along the circumferential direction of the toilet bowl 10, and the plurality of second spray washing openings 102 can be arranged on left and right sides of a rear portion of the toilet bowl, so that a better flushing effect can be achieved.

[0022] The toilet bowl 10 has an arc-shaped front portion 104, an arc-shaped rear slope portion 105 with an inclined design, and a water sealing zone 106 located at the bottom. The arc-shaped front portion 104 and the inclined rear slope portion 105 form a main chamber extending from top to bottom. The shape of the arc-shaped front portion 104 provides a space for receiving urine, and the rear slope portion 105 is gradually inclined forward from top to bottom along the height direction of the toilet body 1 to avoid contact between the rear slope portion 105 and solid excrement during defecation. The water sealing zone 106 is provided at a lower portion of the main chamber and extends toward the rear or side portion of the toilet bowl 10. The sewage outlet 103 is provided at the rear portion or the side portion of the toilet bowl 10 and in communication with the water sealing zone 106. The water sealing zone 106 has a horizontal columnar storage space for storing a certain amount of water, preventing a suction device 12 from coming into contact with solid excrement in the toilet bowl 10, and preventing the solid excrement from adhering to a porcelain surface of the toilet bowl 10. The water stored in the toilet bowl 10 fills the water sealing zone 106 and fills the lower portion of the main chamber so that the water can contact a lower portion of the rear slope portion 105 of the toilet bowl 10. When flushing is performed, a rising portion of the liquid surface significantly raises a water level of the main chamber. The inclined design of the rear slope portion 105 can facilitate collection of liquid and paper. The structural design of the toilet bowl 10 of the embodiment of the present disclosure can significantly raise the water level, gather excrement, and prevent solid excrement from sticking to an inner wall of the toilet bowl 10 during a sewage discharge process.

[0023] The design of the toilet bowl 10 of the embodiment of the present disclosure reduces the need for higher hydraulic forces (flow rate and pressure), and upper toilet paper on the slightly lowered slope (front slope portion) can be flushed off only by a force from the flushing water flow. In addition, an amount of the water stored in the toilet bowl 10 exceeds the water sealing zone 14 and reaches the main chamber, so that it is possible to have a relatively high storage water level, and the water level of the main chamber rises quickly during flushing, so that it is easier to flush away excrement.

[0024] As shown in FIGS. 1 and 2, the suction-type toilet 100 further includes the suction device 12, and the suction device 12 is installed in cooperation with the sewage outlet 103 for generating negative pressure to discharge excrement in the toilet bowl 10. An immersion pump may be used as the suction device 12 of this embodiment, or a vacuum pump or the like may be used in other embodiments.

[0025] As shown in FIG. 2, the suction-type toilet 100 further includes a backflow prevention device 13 provided at an outlet of the suction device 12, and a backflow prevention valve is used as the backflow prevention device in this embodiment. The suction device 12 is mounted in cooperation with the sewage outlet 103 of the toilet body 1 by a flange connector 14, and an O-ring seal and a connecting screw (not shown) fixed to the floor are integrated in the flange connector 14. The suction device 12 can not only suck liquids and solids, but also process solid excrement and toilet paper, stir and crush them.

[0026] In this embodiment, the backflow prevention valve 13 is mounted or reinforced at an outlet of the suction device 13 by a magnetic attraction element 130. When the suction device 12 is in operation, the backflow prevention valve 13 is automatically opened when pushed by an object sucked in, and after the suction device 13 is stopped, the backflow prevention valve 13 is automatically closed, thus sealing the toilet bowl 10 from a sewer. The backflow prevention valve 13 is provided with a closing device (not shown), so that rise of the water level in the toilet bowl 10 does not open the backflow prevention valve 13, and a high pressure generated during operation of the suction device 12 is required to open the backflow prevention valve 13. The magnetic attraction element 130 is fixed at a predetermined height, and only when a predetermined water pressure in the toilet bowl 10 is reached, the backflow prevention valve 13 is opened, or is forced to be opened by a discharge system. An acting force of the suction device 12 is higher than a resistance from opening the backflow prevention valve 13, and when the suction device 12 is not operating, the excrement is prevented from flowing out. Working time of the suction device 12 is set according to time of emptying the toilet.

[0027] In another embodiment, the magnetic attraction element 130 of the backflow prevention valve 13 will open the backflow prevention valve 13 by an opening circuit of a control device 24 (hereinafter the control device 24 of the flushing system 2).

[0028] As shown in FIG. 4, the toilet body 1 of the embodiment of the present disclosure may be of a split type, including a main body and a base, and the main body and the base may be assembled with each other. The drawing is a schematic view of the base portion, and the main body portion can be referred to the upper half of FIG. 2. In a split type toilet body 1, the suction device 12 may be provided in a base, and the base F may cooperate with a main body E of a sitting toilet or may cooperate with a main body of a squatting toilet, so that the base F may be adapted to the sitting toilet or the squatting toilet.

[0029] As shown in FIG. 1, the flushing system 2 includes a first spray washing pipeline 21, a second spray washing pipeline 22, an on-off assembly 23 connected to the first spray washing pipeline 21 and the second spray washing pipeline 22, and a control device 24 electrically connected to the on-off assembly 23 and controlling the on-off assembly 23 to open and close. The first spray washing pipeline 21 is installed in cooperation with the first spray washing opening 101 of the toilet body 1, and the second spray washing pipeline 22 is installed in cooperation with the second spray washing opening 102.

[0030] As shown in FIG. 2, a first nozzle 210 is provided at a water outlet end of the first spray washing pipeline 21, the first nozzle 210 is located at the front end of the toilet bowl 10, and can flush away toilet paper or the like thrown by the user, and the first nozzle 210 is installed in cooperation with the first spray washing opening 101. As shown in the figure, water ejected from the first nozzle 210 enters the horizontal columnar storage space of the water sealing zone 106 along the slightly descended curve at the front end of the toilet bowl 10. The first nozzle 101 includes a horizontal section 2101 and a bent section 2102 that is bent into the toilet bowl 10. The horizontal section 2101 guides ejected water flow horizontally to a position close to a front wall surface, and the bent section 2102 sprays the water flow to an inner wall surface of the toilet bowl 10, thereby effectively cleaning dirt stuck to the inner wall surface of the toilet bowl 10. A water outlet end of the second spray washing pipeline 22 is provided with a second nozzle 220, and the second nozzle 220 is located on a side surface or back surface (rear side) of the toilet bowl 10, and is installed in cooperation with the second spray washing opening 102, for cleaning the inner wall of the rear portion of the toilet bowl 10, and cleaning out excrement contacted by the inner wall of the rear portion.

[0031] In order to improve the cleaning effect, the first nozzle 210 and the second nozzle 220 may alternately spray water, from left to right, or flush in pulses, or the like. According to an available water supply pressure and a flow rate, the first nozzle 210 and the second nozzle 220 are configured to be interchangeable, and injection angles and injection directions of the first nozzle 210 and the second nozzle 220 to the bowl wall are configured to be variable.

[0032] As shown in FIGS. 2 and 3, a backward spray coverage angle of the second nozzle 220 is about 10 degrees, and a forward spray coverage angle of the second nozzle 220 is about 45 degrees, which can be specifically set according to actual situations. The first nozzle 210 and the second nozzle 220 may include threaded interfaces provided with sealing rings for connecting the first nozzle 210 and the second nozzle 220 to the first spray washing pipeline 21 and the second spray washing pipeline 22. The first nozzle 210 and the second nozzle 220 may have various shapes such as a circular shape or a flat shape. The first nozzle 210 can completely clean the inner wall of the front portion of the toilet bowl 10. The angle setting of the second nozzle 220 is to ensure that its flushing range is sufficient to cover the entire toilet bowl 10.

[0033] In order to improve the cleaning performance of the nozzles, the first nozzle 210 and the second nozzle 220 are not fixed on the inner wall of the toilet bowl 10, but are located below an upper edge of the toilet bowl 10, with a short distance from the inner wall. The spray will not flow parallel to the inner wall, but at a certain angle with respect to the inner wall, and a range covered by the spray washing is increased by change of the angle, so that a cleaning effect of the system can be improved.

[0034] A main purpose of the first nozzle 210 is to flush solid objects such as toilet paper thrown by the user after cleaning with paper after urinating. The first nozzle 210 enters a portion of the water sealing zone 106 along the slightly descended curve at the front end of the toilet bowl. The direction of the first nozzle 210 guides the ejected water flow to be inclined toward the front wall surface of the toilet bowl 10. The second nozzle 220 mainly cleans the inner wall of the rear portion of the toilet bowl 10 because it may come into contact with viscous particles. In order to improve the cleaning effect, the second nozzles 220 on both sides operates alternately, either from left to right, or flush in pulses.

[0035] In this embodiment, an electric control valve is used as the on-off assembly 23, and the first spray washing pipeline 21 and the second spray washing pipeline 22 are respectively provided with an electric control valve, i.e., a first electric control valve 23a and a second electric control valve 23b. In other embodiments, the first spray washing pipeline 21 and the second spray washing pipeline 22 may also employ an electric control valve integrally arranged, which is not limited here.

[0036] As shown in FIG. 1, the flushing system 2 further includes a pressurizing device provided in the first spray washing pipeline 21 and the second spray washing pipeline 22 for pressurizing spray washing water of the first spray washing pipeline 21 and the second spray washing pipeline 22 to provide a better flushing effect. An example in which three water channels A, E, and C provide three water supply modes is illustrated in the figure, and any one of them can realize water supply to the first spray washing pipeline 21 and the second spray washing pipeline 22. The water channel A supplies water by a pressurized water tank (such as a gravity flushing water tank 25), the water channel E supplies water by a booster pump, and the water channel C supplies water by a booster pump and a tank body 28 containing a gas-liquid mixture with a certain pressure. One of the three water supply channels can be selected to supply water separately or a combination thereof can be selected to supply water, which is not limited here.

[0037] When the gravity flushing water tank 25 is used as the pressurizing device, water inlet ends of the first spray washing pipeline 21 and the second spray washing pipeline 22 communicate with the gravity flushing water tank 25. The gravity flushing water tank 25 is suspended at a height relative to the toilet body 10 so that pressure is provided solely by gravity of the water in the water tank 25.

[0038] When the booster pump 29 is used as the pressurizing device, the booster pump directly pressurizes water in the first spray washing pipeline 21 and the second spray washing pipeline 22.

[0039] As shown in FIG. 1, the control device 24 includes a control unit (not shown), and an operation panel electrically connected to the control unit, and operation buttons (for example, F, M, S, B as shown in FIG. 1) are provided on the operation panel. The operation buttons may be physical buttons, or may be touch buttons, may be designed as piezoelectric switches, or may be designed as micro switches integrated in the panel. The operation panel may be placed above the toilet body 1, and a switch is connected to the control unit provided with a control program to parameterize different flushing programs. The control device 24 may also be displayed on a terminal through a user interface, which may be a user interface of a sitting toilet or squatting toilet.

[0040] In this embodiment, the control device 24 forms a plurality of flushing modes by controlling sequence of opening and closing of the electric control valves 23a, 23b, and emptying (draining) of the toilet bowl according to different flushing command signals received. In the different flushing modes, the flushing system 2 achieves effective flushing by setting a time sequence of flushing, emptying and refilling the toilet so that the water in the toilet reaches different horizontal positions to maintain an appropriate ratio of solids to liquids. The emptying of the toilet bowl in the embodiment of the present disclosure is achieved by the suction device 12.

[0041] In some cases, the toilet typically uses two flushing modes: one for solids (e.g. feces) and the other for liquids (e.g. urine). The flushing for liquids typically contains only half the volume of the flushing for solids, and a volume of water used by male and female users is typically between 2.5 and 3 liters per use. Flushing of European toilets is specified by the EN 997 standard, with an amount of water per flush being about 6 liters, and an amount of water per flush being 4.8 liters in the US HET standard.

[0042] Male and female users are known to have different practices after urination. Those who do not use toilet paper after urination are usually male users, and those who use toilet paper after urination are usually female users. Male users flush directly after each urination, and female users need toilet paper after urination is over, so this means female users need more water to flush the toilet paper in the toilet. Water savings for urine flushing for male users are about 50% compared to female users, as there is no need to flush toilet paper with water, and the flushing water simply flushes the ceramic surface and refills the siphon.

[0043] Therefore, the suction-type toilet 100 of the embodiment of the present disclosure divides flushing for liquids into two flushing modes, in which the first flushing mode is suitable for flushing for liquids without paper for men, and the second flushing mode is suitable for flushing for liquids with paper for women.

[0044] The first flushing mode is suitable for flushing for liquids without paper for men, and its operation method is as follows.

[0045] After excretion, the user presses a button with a male flush operation (for example, the button may be prompted by the symbol M) to trigger a first flushing command (for example, a low voltage pulse signal). The control device 24 of the flushing system receives the first flushing command, activates the suction device 12 to suck out the excrement, and the backflow prevention valve 13 is automatically opened. When the suction device 12 is stopped after being activated for a first predetermined emptying time, the backflow prevention valve 13 is closed to prevent water from the sewer from flowing back to the water sealing zone 106 of the toilet.

[0046] When the suction device 12 is stopped for a second predetermined emptying time, the first electric control valve 23a is opened, the first spray washing pipeline 21 delivers water flow, and the first nozzle 210 of the first spray washing pipeline 21 sprays water out, wetting the front portion of the toilet bowl 10 for cleaning, and replenishing the amount of water in the water sealing zone 106. The required amount of flushing water is about 200 ml, until a first predetermined liquid level L1 is reached (referring to the corresponding dotted line position in FIG. 2) to cover the water sealing zone 106, and thus a portion of the suction device 12 in contact with the excrement is covered. Or, the amount of water in the water sealing zone 106 may be replenished by the second spray washing pipeline 22, and similarly, the water sealing zone 106 may be replenished by the second spray washing pipeline 22 in various flushing modes described below, which is not limited here.

[0047] Herein, the liquid level of the toilet body 1 can be estimated by opening time of the first electric control valve 23 a, or can be detected by providing a liquid level sensor in the toilet body 1, which is not limited here.

[0048] A specific control method of the first flushing mode can refer to Table 1, in which X represents a time variable, s represents seconds, and the corresponding time can be set by software. This table is a typical logic setup diagram of a flushing program. Table 1Male FlushWater levelToilet ready for useL1Toilet use (without paper)X (s)LMFlush button (M)X (s)LMSuctionX (s)L0Stop timeX (s)L0Toilet bowl fillingX (s)L1

[0049] Herein, when preparing to use the toilet, an initial basic water level L1 is in the toilet bowl. After the user uses the toilet, the water level rises to LM, and the user presses the flush button to directly perform suction and emptying. After a short time, the toilet is flushed and filled with the water level to L1. A main purpose for setting the stop time is to start the filling process only after a process of sucking away the excrement is completely completed. There needs to be a short gap time in the middle, otherwise a suction pump will not know when to stop.

[0050] The first flushing mode is configured to open the first spray washing pipeline 21 or the second spray washing pipeline 22 after the emptying of the toilet bowl 10 is completed, so as to replenish the toilet bowl 10 with water and realize less water consumption.

[0051] When in the first flushing mode, the control device 24 is configured to control the first spray washing pipeline 21 or the second spray washing pipeline 22 to be opened after the emptying of the toilet bowl 10 is completed, and to close the first spray washing pipeline 21 or the second spray washing pipeline 22 when the water in the toilet bowl 10 reaches the first predetermined liquid level L1.

[0052] The second flushing mode is suitable for flushing for liquids with paper for women, and its specific operation method is as follows.

[0053] Since the toilet paper is used by a female user after urinating, the paper is likely to be dropped in the front portion of the toilet bowl 10, and therefore, the amount of flushing water must be sufficient to flush paper pieces to a water-containing portion of the toilet before being discharged. After excretion, the user presses a button with a female flush operation (the button may be prompted by the symbol F) to trigger a second flushing command (low voltage pulse signal).

[0054] The control device 24 receives the second flushing command, controls the first electric control valve 23a to open the first spray washing pipeline 21, and about 400 ml of water is sprayed from the first nozzle 210. The first nozzle 210 is installed at the front portion of the toilet bowl 10 close to the front wall of the toilet, so that the toilet paper enters the lower portion of the toilet bowl 10 from the front portion of the toilet bowl 10 to flush the toilet paper to the water sealing zone part of the toilet bowl 10. The water level rises to a second predetermined liquid level L2, the paper in the toilet bowl 10 can float on the water surface, and the water level in the toilet bowl 10 is higher than a lower end position of the rear slope portion 105 of the toilet bowl 10.

[0055] When the water level rises to the second predetermined liquid level L2 (referring to the corresponding dashed line position in FIG. 2), the control device 24 controls the suction device 12 to turn on, and the suction device 12 sucks out the liquid with the floating toilet paper. The suction device 12 is stopped after operation of the suction device 12 is started for a third predetermined emptying time, and after the suction device 12 is started and before the suction device 12 is stopped, the control device 24 controls the first electric control valve 23a to close. The suction device 12 and the first spray washing pipeline 21 operate simultaneously for a period of time.

[0056] When the water in the toilet bowl 10 is evacuated, the suction device 12 is stopped, and the control device 24 controls the first electric control valve 23a to open again to open the first spray washing pipeline 21 until the water level of the water sealing zone 106 reaches the first predetermined liquid level L1, about 200 milliliters of water to cover components of the suction device 12 in contact with the excrement. The backflow prevention valve 13 is closed to prevent gas from the waste water pipe from entering. Please refer to Table 2 for a specific control process. Table 2Female FlushWater levelToilet ready for useL1Toilet use (with paper)X (s)LFFlush button (F)X (s)LFFlushX (s)L2SuctionX (s)L0Stop timeX (s)L0Toilet bowl fillingX (s)L1

[0057] Herein, when preparing to use the toilet, an initial basic water level L1 is in the toilet bowl. After the user uses the toilet, the water level rises to LF. The user presses the flush button to perform flushing, the water level rises to L2, suction and emptying are performed, and after a short time, the toilet is flushed and filled with the water level to L1.

[0058] In the second flushing mode, the control device is configured to open the first spray washing pipeline 21 before the emptying of the toilet bowl 10 is started, and to open the first spray washing pipeline 21 or the second spray washing pipeline 22 after the emptying of the toilet bowl 10 is completed, thereby enabling cleaning the toilet bowl 10 in accordance with female urination habit.

[0059] Before the emptying of the toilet bowl 10 is started, the first spray washing pipeline 21 is controlled to be opened, and the first spray washing pipeline 21 is closed when the water in the toilet bowl 10 reaches the second predetermined liquid level.

[0060] After the emptying of the toilet bowl 10 is completed, the first spray washing pipeline 21 or the second spray washing pipeline 22 is controlled to be opened to replenish the toilet bowl 10 with water, and the first spray washing pipeline 21 or the second spray washing pipeline 22 is closed when the water in the toilet bowl 10 reaches the first predetermined liquid level L1. Water consumption analysis for the second flushing mode is as follows: approximately 400 ml of water for flushing the paper, approximately 200 ml of water for refilling the bottom of the toilet bowl, and a total amount of emptying of approximately 800 ml (including approximately 200 ml of urine).

[0061] The suction-type toilet 100 of the embodiment of the present disclosure is also provided with a third flushing mode, which is suitable for use by male or female after excretion of solid feces.

[0062] The third flushing mode needs to achieve two objectives. The first objective is to form the solid excrement into an emulsion and discharge it. In this case, more water needs to be added into the toilet bowl 10 to dilute the solids, so the flushing amount is higher than that of the second flushing mode, and the suction device 12 needs to be started at a third predetermined liquid level L3 (referring to the corresponding dotted line position in FIG. 2). The second objective is to clean stains on the toilet bowl 10. A specific operation method is as follows.

[0063] After excretion, the user presses a solid (fecal) flush button with pressurization function (the button can be prompted by the symbol S) to trigger a third flushing command.

[0064] The control device 24 receives the third flushing command, controls the first electric control valve 23a and the second electric control valve 23b to open to open the first spray washing pipeline 21 and the second spray washing pipeline 22, and closes them after a first predetermined flushing time. From the first nozzle 210 of the first spray washing pipeline 21 and the second nozzle 220 of the second spray washing pipeline 22, a water flow rushes toward the wall surface of the toilet bowl 10 until the water flow increases to the third predetermined liquid level L3 to the extent that the solids are partially covered by the flushing water and the toilet paper can float.

[0065] When the water is still flushing in, the suction device 12 is started to suck the excrement in the toilet bowl, and is stopped after a fourth predetermined emptying time. Opening time of the first spray washing pipeline 21 and the second spray washing pipeline 22 when the suction device 12 is in operation is defined as a first predetermined duration. The first spray washing pipeline 21 and the second spray washing pipeline 22 are stopped before the suction device 12 is stopped in order to completely suck out the excrement in the toilet bowl 10.

[0066] After the suction device 12 stops suction, the first spray washing pipeline 21 is opened to fill the toilet bowl 10 with water, and the water rises to the first predetermined liquid level L1 again. Please refer to Table 3 for a specific control process. Table 3Flushing for solid excretaLiquid levelToilet ready for useL1Toilet use (with paper)X (s)LsFlush button (S)X (s)LsFlush (nozzles of both sides)X (s)L3SuctionX (s)L0Stop timeX (s)L0Toilet bowl fillingX (s)L1

[0067] Herein, when preparing to use the toilet, an initial basic water level L1 is in the toilet bowl. After the user uses the toilet, the water level rises to Ls. The user presses the flush button, the two nozzles perform flushing, the water level rises to L3, and then suction and emptying are performed. When emptying, the two nozzles perform flushing for a period of time, and after a short time after the emptying, the toilet bowl is flushed and filled with the water level to L1.

[0068] The third flushing mode is configured to open the first spray washing pipeline 21 and the second spray washing pipeline 22 before the emptying of the toilet bowl 10 is started, and to open the first spray washing pipeline 21 or the second spray washing pipeline 22 after the emptying of the toilet bowl 10 is completed, thereby achieving a better cleaning effect.

[0069] When in the third flushing mode, the control device 24 is configured to: control the first spray washing pipeline 21 and the second spray washing pipeline 22 to be opened for a first predetermined flushing time before the emptying of the toilet bowl 10 is started so that the liquid level of the toilet bowl 10 reaches the third predetermined liquid level, the third predetermined liquid level being greater than the second predetermined liquid level; continuously open the first spray washing pipeline 21 and the second spray washing pipeline 22 for the first predetermined duration when the toilet bowl 10 is emptied; close the first spray washing pipeline 21 and the second spray washing pipeline 22 before the emptying of the toilet bowl 10 is completed; and control the first spray washing pipeline 21 or the second spray washing pipeline 22 to be opened to replenish the toilet bowl 10 with water after the emptying of the toilet bowl 10 is completed, and close the first spray washing pipeline 21 or the second spray washing pipeline 22 when the water in the toilet bowl 10 reaches the first predetermined liquid level. Water consumption analysis of the third flushing mode is as follows: about 600 ml for cleaning the bowl wall and flushing the paper, about 200 ml for replenishing the water seal of the toilet bowl and cleaning the front portion of the toilet bowl. The input of solid excreta and liquid excreta is approximately 350 ml. The filled water (approximately 200 ml) is left in the lower portion of the toilet bowl for next use. The total volume to be treated is approximately 950 ml of liquid (excreta contains approximately 80% liquid).

[0070] The suction-type toilet 100 of the embodiment of the present disclosure is further provided with a fourth flushing mode: pressurized flushing suitable for private residential or commercial or public applications.

[0071] The fourth flushing mode may be an additional function of the third flushing mode, and is mainly different from the third flushing mode in that when the fourth flushing mode is turned on, opening time of the first electric control valve 23a and the second electric control valve 23b is prolonged by about 30%, thereby increasing the flushing amount, and activation time of the suction device 12 is also relatively prolonged.

[0072] The opening time of the first electric control valve 23a and the second electric control valve 23b is defined as the first predetermined flushing time. Opening time of the first spray washing pipeline 21 and the second spray washing pipeline 22 when the suction device 12 is in operation is defined as a second predetermined duration. The second predetermined duration is greater than the first predetermined duration of the third flushing mode.

[0073] The activation time of the suction device 12 is defined as a fifth predetermined emptying time, the fifth predetermined emptying time being greater than the fourth predetermined emptying time. The suction device 12 is turned on when the liquid level reaches the third predetermined liquid level L3, and the time at which the liquid level reaches the third predetermined liquid level L3 may be estimated from the opening times of the first electric control valve 23a and the second electric control valve 23b, or may be detected by the liquid level sensor, which is not limited here.

[0074] When in the fourth flushing mode, the control device 24 is configured to: control the first spray washing pipeline 21 and the second spray washing pipeline 22 to be opened for the first predetermined flushing time before the emptying of the toilet bowl 10 is started so as to make the liquid level in the toilet bowl 10 reach the third predetermined liquid level; continuously open the first spray washing pipeline 21 and the second spray washing pipeline 22 for a second predetermined duration when the toilet bowl 10 is emptied, the second predetermined duration being greater than the first predetermined duration; close the first spray washing pipeline 21 and the second spray washing pipeline 22 before the emptying of the toilet bowl 10 is completed; and control the first spray washing pipeline 21 or the second spray washing pipeline 22 to be opened to replenish the toilet bowl 10 with water after the emptying of the toilet bowl 10 is completed, and close the first spray washing pipeline 21 or the second spray washing pipeline 22 when the water in the toilet bowl 10 reaches the first predetermined liquid level. In addition, a fourth flushing command corresponding to the fourth flushing mode is triggered when the user presses the flush button with the pressurized flush (the button can be prompted by the symbol B). The remaining operation steps of the fourth flushing mode may refer to the third flushing mode, and will not be repeatedly described here.

[0075] To avoid risk of running out of water capacity due to excessive use, the flushing system is equipped with a reminder function. A first reminder mode is that: a first sensor 26 electrically connected to the control device 24 is arranged in the water tank 25 for detecting the water level, and when the water level of the water tank 25 does not match a water consumption curve, an indicator light reminder is performed. The control device 24 has the water consumption curve stored in advance, collects and calculates the water consumption data of the water tank 25 to determine whether they are matched, and performs an indicator light reminder when they are not matched. A second reminder method is that: the water level corresponding to the flush button B, which is recommended to be used for pressurized flushing, can be marked in the toilet bowl, and is just prompted by an indicator light. The flush button B can prompt the user to operate by using variation of the indicator light.

[0076] The suction-type toilet 100 of the embodiment of the present disclosure is further provided with a fifth flushing mode: a fully automatic full flushing suitable for use in public or commercial applications where the user is not familiar with the flush process of the fourth flushing mode. The fifth flushing mode can be used for treating solids (feces) in the toilet bowl with a volume higher than usual. Since a larger volume of solids is expelled into the toilet bowl, a larger volume of water (e.g., about 800 milliliters instead of about 600 milliliters) needs to be injected to clean the bowl wall and flush away the paper.

[0077] A second liquid level sensor 27 is provided on a back surface of the toilet bowl 10, to detect a liquid level after solid and liquid excrements are input into the toilet bowl. When the control device 24 receives that the liquid level in the toilet bowl exceeds a predetermined liquid level value, the control device 24 selects to start the fifth flushing mode.

[0078] For example, when approximately 170 milliliters of solids are input into the toilet bowl, the water level of the toilet bowl 10 is raised to the high water level of the toilet bowl. If there are more than about 200 milliliters of urine and more than about 170 milliliters of solids volume, the second liquid level sensor 27 may detect excreta input above a predetermined level and may adjust the flushing amount accordingly, meaning that the fifth flushing mode will be carried out.

[0079] The fifth flushing mode may be an automatic flushing mode, and is mainly different from the fourth flushing mode in that this mode does not require a button operation by the user, and a fifth flushing command of the control device 24 to turn on the fifth flushing mode is obtained through the second liquid level sensor 27. When the second liquid level sensor 27 senses that the solids and liquids input into the toilet bowl exceeds a predetermined value (generally, the liquid level in the toilet bowl exceeds a predetermined liquid level value), the fifth flushing mode is selected to be started.

[0080] After the fifth flushing mode is started, the control device 24 controls the opening of the first spray washing pipeline 21 and the second spray washing pipeline 22 for a second predetermined flushing time. The second predetermined flushing time is greater than the first predetermined flushing time.

[0081] When the liquid level in the toilet bowl 10 reaches a fourth predetermined liquid level, the control device 24 controls the suction device 12 to start for a sixth predetermined emptying time and then stop. The first spray washing pipeline 21 and the second spray washing pipeline 22 are closed before the suction device 12 stops working, and the first spray washing pipeline 21 and the second spray washing pipeline 22 remain open for a third predetermined duration after the suction device 12 is turned on. The fourth predetermined liquid level is greater than the third predetermined liquid level, the sixth predetermined emptying time is greater than the fifth predetermined emptying time, and the third predetermined duration is greater than or equal to the first predetermined duration.

[0082] When the suction device 12 stops suction, the first spray washing pipeline 21 is opened again, and when the liquid level in the toilet bowl 10 reaches the first predetermined liquid level L1, the first spray washing pipeline 21 is closed.

[0083] In order to distinguish between the flushing water and a rising waste liquid level in the toilet bowl 10, the second liquid level sensor 27 is turned off when the flushing operation is performed and the liquid flows in from top to bottom (urination). For example, upon receiving a flushing signal, the second liquid level sensor 27 starts detection to determine whether to turn on the fifth flushing mode. Since the second liquid level sensor 27 is turned off after the detection is completed, the second liquid level sensor 27 is turned off when the toilet bowl 10 is flushed in a certain flushing mode or when the toilet bowl 10 is being used. The remaining operation steps of the fifth flushing mode may be the same as those of the fourth flushing mode, and will not be repeatedly described here.

[0084] Optionally, the fifth flushing mode may be manually triggered, and a corresponding button may be triggered by the user to trigger the fifth flushing signal, which is not limited here.

[0085] When in the fifth flushing mode, the control device 24 is configured to: control the on-off assembly 23 to open the first spray washing pipeline 21 and the second spray washing pipeline 22 for a second predetermined flushing time before the emptying of the toilet bowl 10 is started when the second liquid level sensor 27 detects that the liquid in the toilet bowl 10 reaches the fourth predetermined liquid level (the fourth predetermined liquid level is higher than the third liquid level), the second predetermined flushing time being greater than the first predetermined flushing time; continuously open the first spray washing pipeline 21 and the second spray washing pipeline 22 when the toilet bowl 10 is emptied; close the first spray washing pipeline 21 and the second spray washing pipeline 22 before the emptying of the toilet bowl 10 is completed; and control the first spray washing pipeline 21 or the second spray washing pipeline 22 to be opened when the emptying of the toilet bowl 10 is completed, and close the first spray washing pipeline 21 or the second spray washing pipeline 22 when the water in the toilet bowl 10 reaches the first predetermined liquid level.

[0086] The water consumption of the suction-type toilet flush of the embodiment of the present disclosure is < 1.0 liters per flush. The fifth flushing mode saves about 79% of water compared to the high-efficiency toilet of the US standard 4.8 liters per flush (about 1.28 gallons per flush for US HET toilets). When pressurized flushing is used, its water saving is lower, about 1.5 liters of water is used per flush for pressurized flushing, but compared with 4.8 liters per flush, about 69% of water saving is still achieved.

[0087] When any of the above-described flushing modes of the embodiments of the present disclosure are started, the pressurizing device is required for pressurizing so that the fluid pressure can be between 1.2 and 4.0 bar. For example, a gravity water tank 25, a booster pump 29 and the like may be used as the above-mentioned pressurizing device.

[0088] When only the gravity water tank 25 is used as the pressurizing device, a water flow pressure of the gravity water tank 25 reaches about 0.15 to 0.2 bar, flushing performance can thus be reduced, but can be compensated to some extent by higher flushing volumes and larger flushing tube diameters. The water of the gravity water tank 25 may be supplemented with tap water or may be water collected and filtered from a rainwater collection tank. In this case, the solenoid valves 23a, 23b can also be operated without counter pressure. When the water level of the gravity water tank 25 is low, the boost function will be turned off.

[0089] The applicant has proved through research that the suction-type toilet 100 of the embodiments of the present disclosure has a good water-saving effect. Table 4 shows a calculation of water savings after two full flushes and six urinations per day for two adults (one male and one female) using the suction-type toilet 100 of the embodiment of the present disclosure, with a water saving of 82% (water savings of 77% in the absence of male flushing mode). Table 4Number of uses per day*HET Water amount per flushHET Total water consumptionMicro flush water volume per flushTotal water consumption of micro flushFully automatic flushing44.8 L19.2 L< 1.0 L4.0 LMale Flush62.4 L14.4 L0.2 L1.2 LFemale Flush62.4 L14.4 L0.6 L3.6 LTotal48.0 L8.8 L* Example: One male user and one female user per day

[0090] As shown in FIG. 1, the flushing system 2 of the embodiment of the present disclosure further includes a tank body 28 connected to the first spray washing pipeline 21 and the second spray washing pipeline 22, and the tank body 28 is used for storing a gas-liquid mixture having a certain pressure. The tank body 28 can convey the gas-liquid mixture to the first spray washing pipeline 21 and the second spray washing pipeline 22 to flush the toilet bowl, thereby improving the flushing capacity and saving water.

[0091] In addition, a bubbler may be provided at the first nozzle 210 of the first spray washing pipeline 21 and the second nozzle 220 of the second spray washing pipeline 22 to produce a gas-liquid mixture, so as to achieve a better cleaning effect.

[0092] As shown in FIG. 6, the tank body 28 is made of a pressure-resistant steel body and has a water inlet and an air inlet (not labeled). In an exemplary embodiment, a flow guide rubber membrane box is used as the tank body 28, an air inlet valve is provided at an air inlet, and an air pump is provided. Under the action of the air pump, compressed air (1.2 to 4.0 bar or higher) can be fed into the flow guide rubber membrane box, with the effect that the flow guide rubber membrane box will expand to a side containing water by the pressurized air and fill the volume with the pressurized air. The booster pump is provided at the water inlet. Starting the booster pump will generate a water pressure higher than a pressure on the air side to resist the air pressure. Since the air is compressible, the water side can compress the air side and fill the tank body with water at the pressure set by the booster pump.

[0093] As shown in FIGS. 5 and 6, the flushing system of the embodiment of the present disclosure can be all integrated into one box body D. When the flushing system is used for a plurality of toilets, at least the control panel cannot be integrated into the box body, and a plurality of panels need to be provided corresponding a plurality of toilets for user operation, which can realize an integrated, pre-installed one-piece design, which is plug and play, can be placed on the floor, or can be installed on a wall of a room. The design is easy to install while allowing one flushing system to be applied to the plurality of toilets. For example, for a box body for a plurality of toilets in public restroom, an integrated plumbing system with universal inlet connectors can be provided, which can supply water from the side or top. All electronic components in the box body are integrated and wired, so that only the integrated flushing system needs to be electrically connected to a power source or can be electrically connected to an operating switch (e.g. a plug). For the operation panel, the wiring is pre-installed and the control unit (e.g. CPU) is also integrated. In order to ensure a safe space, the tank body 28 may also be "flat-shaped" and its depth needs to be reduced compared to a spherical or cylindrical container. Depending on performance of the booster pump, the booster pump can be installed outside the box body. The control unit is further electrically connected to a first liquid level sensor 26 and a second liquid level sensor 27 and is used for starting and stopping the booster pump. The control unit can also initiate a cleaning flush when the toilet has been used for too long and a risk of bacterial growth rises, which facilitates improving hygiene of standing water. The flushing system 2 may be provided with a connector with a plug, which can be electrically connected to a DC power source (such as a battery), for power supply.

[0094] The flushing time and the emptying time of each flushing mode of the embodiment of the present disclosure can be set, and since the flushing process operates and controls the on-off assembly 23 and the suction device 12 in time sequence, the time setting can be adjusted according to the flushing system. After a mode is selected, an operator can select the start time of each valve / pump after pressing the corresponding start button. As shown in Table 5, an setting interface of a flushing mode for solids is displayed on an operation interface, and the user can select and operate the time and operation sequence on the operation interface. Table 5Flushing for solidsAscending orderActivated after startup (seconds)Duration (seconds)ExamplesFirst solenoid valve 23a-Second solenoid valve 23b105FlushSuction device 12238PumpFirst solenoid valve 23a3122FillingSecond solenoid valve 23b-Suction device 12- The procedure can be done by a remote control or a Bluetooth program on a smartphone.

[0095] In the embodiment of the present disclosure, the first predetermined liquid level L1 is an initial basic liquid level, the second predetermined liquid level L2 and the third predetermined liquid level L3 are calculated using the basic liquid level as a basis, and the second predetermined liquid level L2 and the third predetermined liquid level L3 can be determined by controlling parameters such as opening times of the electric control valves 23a and 23b.

[0096] In the description of the present specification, descriptions with reference to terms "one embodiment", "certain embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" and the like mean that specific features, structures, materials, or characteristics described in connection with the implementations or examples are included in at least one implementation or example of the embodiments of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same implementations or examples. Further, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more implementations or examples.

[0097] Although implementations disclosed herein are described above, the described contents are only implementations used for facilitating understanding of the present application, and are not intended to limit the present application. Without departing from the spirit and scope disclosed herein, any person skilled in the art to which the present application pertains may make any modifications and changes in the form and details of implementation, but the scope of patent protection of the present application shall still be defined by the appended claims.

Claims

1. A suction-type toilet, comprising: a toilet bowl provided with a first spray washing opening and a second spray washing opening, and a sewage outlet for connecting with a suction device; wherein the first spray washing opening and the second spray washing opening are both arranged at an upper portion of the toilet bowl, the first spray washing opening is arranged at a front portion of the toilet bowl, and the second spray washing opening is arranged at rear of the first spray washing opening; the toilet has a plurality of flushing modes, the plurality of flushing modes comprise at least one of a first flushing mode and a second flushing mode, and further comprise a third flushing mode; in the first flushing mode, the first spray washing opening or the second spray washing opening is configured to replenish the toilet bowl with water after draining; in the second flushing mode, the first spray washing opening is configured to flush the toilet bowl before draining, and the first spray washing opening or the second spray washing opening is configured to replenish the toilet bowl with water after draining the toilet bowl; in the third flushing mode, the first spray washing opening and the second spray washing opening are configured to simultaneously flush the toilet before draining the toilet bowl, and the first spray washing opening or the second spray washing opening is configured to replenish the toilet with water after draining the toilet.

2. The suction-type toilet according to claim 1, wherein a plurality of second spray washing openings are provided, the plurality of second spray washing openings are symmetrically arranged on two sides of a rear portion of the toilet bowl, and the second spray washing openings on the two sides are configured to alternately flush during flushing.

3. The suction-type toilet according to claim 1, further comprising a first nozzle installed at the first spray washing opening and a second nozzle installed at the second spray washing opening; wherein the first nozzle and the second nozzle are disposed toward an inner wall of the toilet bowl, and injection angles and injection directions of the first nozzle and the second nozzle are adjustable.

4. The suction-type toilet according to claim 1, wherein the toilet bowl has a main chamber extending from top to bottom in a height direction thereof, and a water sealing zone in communication with the main chamber; and the main chamber comprises an arc-shaped front portion, and an inclined rear slope portion, and the rear slope portion gradually inclines from top to bottom towards the front portion of the toilet bowl.

5. The suction-type toilet according to claim 4, wherein the water sealing zone is disposed at a lower portion of the main chamber and extends toward a rear portion or a side portion of the toilet bowl; the sewage outlet is provided at the rear portion or the side portion of the toilet bowl and is in communication with the water sealing zone.

6. The suction-type toilet according to claim 1, further comprising: a first spray washing pipeline connected to the first spray washing opening, a second spray washing pipeline connected to the second spray washing opening, an on-off assembly connected to the first spray washing pipeline and the second spray washing pipeline, and a control device electrically connected to the on-off assembly; wherein the control device is configured to control opening and closing of the first spray washing pipeline and the second spray washing pipeline by controlling the on-off assembly, so as to control spray-washing of the first spray washing opening and the second spray washing opening.

7. The suction-type toilet according to claim 6, further comprising: a suction device connected to the sewage outlet and configured to suck and empty contents in the toilet bowl, the control device being electrically connected to the suction device and configured to control turn-on and turn-off of the suction device.

8. The suction-type toilet according to claim 7, further comprising a backflow prevention device provided at an outlet of the suction device, the backflow prevention valve being mounted at the outlet of the suction device by a magnetic attraction element; wherein the backflow prevention device is configured to be automatically opened when the suction device is operating, and to be automatically closed when the suction device stops operating.

9. The suction-type toilet according to claim 7, further comprising a pressurizing device connected to the first spray washing pipeline and the second spray washing pipeline, wherein the pressurizing device is configured to pressurize water to be input into the first spray washing pipeline and the second spray washing pipeline, the suction-type toilet further has a fourth flushing mode; when in the fourth flushing mode, the control device is configured to: before emptying of the toilet bowl is started, control the first spray washing pipeline and the second spray washing pipeline to open and control the pressurizing device to turn on so as to perform pressurization; when the toilet bowl is being emptied, continuously open the first spray washing pipeline and the second spray washing pipeline; before the emptying of the toilet bowl is completed, close the first spray washing pipeline and the second spray washing pipeline; and after the emptying of the toilet bowl is completed, control the first spray washing pipeline or the second spray washing pipeline to open so as to replenish the toilet bowl with water.

10. The suction-type toilet according to claim 9, wherein the pressurizing device is a gravity water tank, water inlet ends of the first spray washing pipeline and the second spray washing pipeline are both connected to the gravity water tank, and the gravity water tank is provided with a first liquid level sensor electrically connected to the control device; the control device is configured to remind a user not to use the fourth flushing mode when the first liquid level sensor detects that a water level and a water consumption curve of the water tank do not match a water level and a water consumption curve stored in advance in the control device.

11. The suction-type toilet according to claim 7, further comprising a second liquid level sensor extending into the toilet bowl and electrically connected to the control device; wherein the suction-type toilet further has a fifth flushing mode, the control device is configured to control the suction-type toilet to be in the fifth flushing mode when the second liquid level sensor senses that a liquid level within the toilet bowl reaches a predetermined value; and in the fifth flushing mode, the control device is configured to: control the first spray washing pipeline and the second spray washing pipeline to be opened simultaneously before the emptying of the toilet bowl is started; continuously open the first spray washing pipeline and the second spray washing pipeline when the toilet bowl is being emptied; and control the first spray washing pipeline or the second spray washing pipeline to replenish the toilet bowl with water after the toilet bowl is emptied.

12. The suction-type toilet according to any one of claims 1 to 10, further comprising a tank body for storing a gas-liquid mixture, wherein the tank body comprises an air inlet for introducing gas, a water inlet for introducing liquid, and a gas-liquid mixture outlet; the suction-type toilet further comprises a booster pump connected to the air inlet or the water inlet, and the gas-liquid mixture outlet is connected to input ends of the first flushing pipeline and the second flushing pipeline.

13. The suction-type toilet according to any one of claims 6 to 10, further comprising a main body located at an upper portion and a base located at a lower portion and assembled with the main body, wherein the main body comprises the toilet bowl, and the suction device is disposed at the base.

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