CN216405636U

CN216405636U - Controller of vacuum closestool

Info

Publication number: CN216405636U
Application number: CN202122810621.4U
Authority: CN
Inventors: 潘建光
Original assignee: Zhejiang Jianjiang Ship Technology Co ltd
Current assignee: Zhejiang Jianjiang Ship Technology Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-04-29
Anticipated expiration: 2031-11-16

Abstract

The utility model discloses a controller of a vacuum toilet, which comprises a vacuum blowoff valve, a pneumatic control actuator and a distributor arranged between the vacuum blowoff valve and the pneumatic control actuator, wherein the bottom of the vacuum blowoff valve is provided with a blowoff channel, two ends of the blowoff channel are respectively provided with a sewage inlet and a sewage outlet, and the sewage inlet and the sewage outlet are respectively used for connecting a defecation tank and a vacuum sewer of the vacuum toilet; the pneumatic control actuator comprises a pneumatic control delay switch, a water inlet valve, a pneumatic telescopic cylinder, a first air valve and a second air valve. The utility model adopts a main control execution part which comprises a vacuum blow-down valve, a pneumatic control actuator and a distributor arranged between the vacuum blow-down valve and the pneumatic control actuator and is used for realizing the blow-down action of the vacuum closestool after use, and the utility model has small integral structure volume, has the function of delayed flushing adjustment and stronger use convenience. The pneumatic control actuator has compact structural design, small occupied space and high integration level, thereby facilitating the space utilization and the part configuration during the installation.

Description

Controller of vacuum closestool

Technical Field

The utility model relates to a controller, in particular to a controller of a vacuum toilet.

Background

The vacuum sewage system is characterized in that the alternation of partial vacuum and atmospheric pressure in the controller chamber is switched to realize the opening (working state) and the closing (non-working state) of the vacuum sewage valve and the flushing water valve, wherein the control device plays an important role, and the control process of the control device is as follows: the vacuum waste valve is operated such that feces or other gaseous and liquid solids in the vacuum toilet are discharged from the vacuum toilet related equipment to a vacuum collection device (e.g., an intermediate receptacle, a following vacuum waste tank) or a vacuum sewer, while the flush water valve is operated such that flush water is flushed through the vacuum toilet related equipment cavity related chamber. The prior art already has a vacuum toilet related control device, which mainly has the following defects: each unit in the control device is relatively independent, the number of elements is large, the specification number is large, individual parts are movable parts which are matched with other parts, the structural size is small, the damage is easy, and the controller is complex in structure, high in cost, short in service life, low in reliability and high in manufacturing and maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provides a controller of a vacuum toilet to solve the problems that an internal controller of a vacuum sewage system in the prior art is unreasonable in structural design and large in occupied space.

The utility model adopts the technical scheme for solving the technical problems that: a controller of a vacuum toilet comprises a vacuum blowoff valve, a pneumatic control actuator and a distributor arranged between the vacuum blowoff valve and the pneumatic control actuator, wherein the bottom of the vacuum blowoff valve is provided with a blowoff channel, two ends of the blowoff channel are respectively provided with a sewage inlet and a sewage outlet, the sewage inlet and the sewage outlet are respectively used for connecting a toilet bowl and a vacuum sewage pipeline of the vacuum toilet, the side wall of the sewage outlet is provided with a vacuum connector, and the top of the vacuum blowoff valve is provided with a blowoff valve control connector;

the pneumatic control actuator comprises a pneumatic control delay switch, a water inlet valve, a pneumatic telescopic cylinder, a first air valve and a second air valve; the pneumatic control actuator is used for controlling the opening and closing of the water inlet valve and the vacuum sewage discharge valve to realize the flushing and sewage discharge of the toilet bowl of the vacuum toilet; the pneumatic control time delay switch is connected with a pneumatic control flushing button of the vacuum closestool and is used for controlling the intermittent opening and closing of the first air valve; the first air valve is provided with a first input interface, a second air interface and a first output interface and is used for controlling the stretching of the pneumatic telescopic cylinder; the outer wall of the pneumatic telescopic cylinder is provided with a cylinder control interface connected with the first output interface, and the pneumatic telescopic cylinder telescopically controls the opening and closing of the water inlet valve and the second air valve through the air pressure change of the cylinder control interface; the water inlet valve is provided with a water inlet and a water outlet, the water inlet is connected with a tap water pipeline, and the water outlet is connected with the inner wall of the urinal; the second air valve is provided with a second input interface and a second output interface, and the second output interface is connected with the control interface of the blowdown valve and is used for controlling the opening and closing of the vacuum blowdown valve;

the upper portion of distributor is connected first input interface and second input interface, the middle part of distributor is equipped with the check valve, the lower part of distributor is connected with the vacuum interface.

The pneumatic control delay switch comprises a valve rod, a piston plate fixedly connected with the valve rod and a first return spring for realizing the movement return of the valve rod; the lateral wall of the pneumatic control delay switch is also provided with a pneumatic control interface and a pressure relief port which are respectively positioned at two sides of the piston plate, the pneumatic control interface is connected with the output end of a pneumatic control flushing button of the air pipe vacuum toilet, the pressure relief port is connected with the upper part of the distributor through an air pipe, and the piston plate is provided with a through hole for balancing air pressure at two sides.

Further perfecting, the pneumatic telescopic cylinder also comprises a telescopic air bag communicated with the air cylinder control interface, a sliding toggle piece fixed at the movable end of the telescopic air bag and a second reset spring arranged in the telescopic air bag and used for realizing the movement reset of the sliding toggle piece, the side wall of the sliding shifting piece is provided with a first shifting lug and a second shifting lug, the water inlet valve comprises a first lever and a third return spring, one end of the first lever is matched with the first shifting lug, two sides of the other end of the first lever are respectively matched with the normally closed inner end of the water inlet and the normally open inner end of the water outlet, the second air valve comprises a second lever and a fourth return spring, one end of the second lever is matched with the second toggle bump, and two sides of the other end of the second lever are respectively matched with the inner end of the second input interface in a normally closed mode and the inner end of the second output interface in a normally open mode.

Further perfect, the middle part of trapway is equipped with the disk seat, the inside lift gasbag that is linked together with the blowoff valve control interface that is equipped with of vacuum blowoff valve, the upper end and the vacuum blowoff valve fixed connection of lift gasbag, the inside of lift gasbag is equipped with the lift pressure spring, and the lower extreme of lift gasbag is equipped with the end cover, is equipped with the flashboard with the sealed complex of disk seat on the end cover, be equipped with the sealed membrane pad of bowl form between disk seat and the flashboard, the edge and the vacuum blowoff valve inner wall fixed connection of the sealed membrane pad of bowl form, the bottom upper surface and the flashboard lower extreme fixed connection of the sealed membrane pad of bowl form, the vacuum blowoff valve top be equipped with the blowoff valve control interface that the lift gasbag is linked together is equipped with the atmospheric first air interface of intercommunication on the lateral wall of vacuum blowoff valve, first air interface is located between lift gasbag and the sealed membrane pad of bowl form.

Further perfection, the sealed sand grip of U-shaped is gone up on the middle inner wall of disk seat, is equipped with the sealed recess of U-shaped with the sealed sand grip complex of U-shaped on the flashboard.

Further perfect, the both sides of flashboard respectively are equipped with a trip, the bottom upper surface mounting of the sealed membrane pad of bowl form is provided with two pull rods, and the pull rod upper end is equipped with the buckle with trip cooperation joint.

Further perfection, the vacuum interface is provided with a sealing gasket, and the sealing gasket and the bowl-shaped sealing membrane pad are integrally formed.

Further perfection, be equipped with vertical guide slot on the both sides of the inner wall of vacuum blowoff valve, the both sides of end cover all are equipped with the horizontal pole with vertical guide slot sliding fit.

The utility model has the beneficial effects that: the main control execution part in the closestool body is formed by the distributor which comprises the vacuum blow-down valve, the pneumatic control actuator and the distributor arranged between the vacuum blow-down valve and the pneumatic control actuator and is used for realizing blow-down action after the vacuum closestool is used, and the pneumatic control actuator is integrated with the pneumatic control delay switch, the water inlet valve, the pneumatic expansion cylinder, the first air valve and the second air valve, so that the integral structure is small in size, has a delayed flushing adjusting function and is higher in use convenience. The pneumatic control actuator has compact structural design and small occupied space, so that the space utilization and the part configuration during installation are convenient and easy, the investment cost is low, the time consumption of maintenance is low, the cost is relatively low, and the service life can be effectively prolonged by the efficient structural design in the process of putting in use.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic diagram of the right view structure of the present invention;

FIG. 3 is a schematic structural diagram of a pneumatic control delay switch;

FIG. 4 is a schematic cross-sectional view of a vacuum waste valve;

description of reference numerals: 100. a vacuum blowoff valve, 101, a blowoff passage, 102, a sewage inlet, 102, a sewage outlet, 104, a vacuum port, 105, a blowoff valve control port, 106, a valve seat, 107, a lifting air bag, 108, an end cover, 109, a gate plate, 110, a bowl-shaped sealing membrane gasket, 111, a first air port, 112, a U-shaped sealing convex strip, 113, a U-shaped sealing groove, 114, a snap hook, 115, a pull rod, 116, a cross rod, 117, a sealing gasket, 118, a vertical guide groove, 200, an air-controlled actuator, 201, an air-controlled delay switch, 202, a water inlet valve, 203, a pneumatic telescopic cylinder, 204, a cylinder control port, 205, a first air valve, 206, a first input port, 207, a second air port, 208, a first output port, 209, a second air valve, 210, a second input port, 211, a second output port, 212, a valve stem, 213, a piston plate, 214, a first reset spring, 215, an air-controlled port, 216. pressure relief port 217, through hole 300, distributor 301, check valve.

Detailed Description

The utility model will be further described with reference to the accompanying drawings in which:

referring to figures 1-2: the controller of the vacuum toilet in the embodiment comprises a vacuum blowoff valve 100, a pneumatic control actuator 200 and a distributor 300 arranged between the vacuum blowoff valve 100 and the pneumatic control actuator, wherein the bottom of the vacuum blowoff valve 100 is provided with a blowoff channel 101, two ends of the blowoff channel 101 are respectively provided with a sewage inlet 102 and a sewage outlet 103, the sewage inlet 102 and the sewage outlet 103 are respectively used for connecting a toilet bowl and a vacuum sewage drainage pipe of the vacuum toilet, the side wall of the sewage outlet 103 is provided with a vacuum connector 104, the vacuum connector 104 is used for connecting a vacuum air source of the vacuum sewage drainage pipe, and the top of the vacuum blowoff valve 100 is provided with a blowoff valve control connector 105; negative or positive pressure is applied at the waste gate control interface 105 to control the opening and closing of the vacuum waste gate 100.

The pneumatic control actuator 200 comprises a pneumatic control delay switch 201, a water inlet valve 202, a pneumatic telescopic cylinder 203, a first air valve 205 and a second air valve 209; the pneumatic control actuator 200 is used for controlling the opening and closing of the water inlet valve 202 and the vacuum sewage discharge valve 100 to realize flushing and sewage discharge of a toilet bowl of the vacuum toilet; the pneumatic control delay switch 201 is connected with a pneumatic control flushing button of the vacuum toilet and is used for controlling the intermittent opening and closing of the first air valve 205; the first air valve 205 is provided with a first input interface 206, a second air interface 207 and a first output interface 208, and is used for controlling the expansion and contraction of the pneumatic expansion cylinder 203; the outer wall of the pneumatic telescopic cylinder 203 is provided with a cylinder control interface 204 connected with a first output interface 208, and the pneumatic telescopic cylinder 203 telescopically controls the opening and closing of the water inlet valve 202 and the second air valve 209 through the air pressure change of the cylinder control interface 204; the water inlet valve 202 is provided with a water inlet and a water outlet, the water inlet is connected with a tap water pipeline, and the water outlet is connected with the inner wall of the urinal; the second air valve 209 is provided with a second input interface 210 and a second output interface 211, and the second output interface 211 is connected with the blowdown valve control interface 105 and is used for controlling the opening and closing of the vacuum blowdown valve 100;

the upper part of the distributor 300 is connected with the first input interface 206 and the second input interface 210, the middle part of the distributor 300 is provided with a check valve 301, and the lower part of the distributor 300 is connected with the vacuum interface 104.

The working principle is as follows: when the pneumatic control flushing button is pressed, the pneumatic control delay switch 201 controls the first air valve 205 to be opened, the first input interface 206 and the first output interface 208 are conducted, the air cylinder control interface 204 of the pneumatic telescopic cylinder 203 is connected with negative pressure, the pneumatic telescopic cylinder 203 contracts to open the water inlet valve 202 and the second air valve 209, the water inlet and the water outlet, the second input interface 210 and the second output interface 211 are conducted, the water inlet valve 202 is opened to realize flushing, the vacuum blowoff valve 100 is opened to realize blowdown, then the pneumatic control delay switch 201 delays to close the first air valve 205, the first input interface 206 and the first output interface 208 are disconnected, the first output interface 208 is communicated with the second air interface 207 again in the closing process of the first input interface 206, the distributor 300 and the second air interface 207 are temporarily, so that the vacuum environment inside the pneumatic telescopic cylinder 203 and the vacuum blowoff valve 100 is destroyed, and the water inlet valve 202 and the vacuum blowoff valve 100 are closed, the whole process of controlling the flushing and the pollution discharge of the vacuum closestool is completed. The controller of the utility model adopts a main control execution part which comprises a vacuum blow-down valve, a pneumatic control actuator and a distributor arranged between the vacuum blow-down valve and the pneumatic control actuator and is formed into a horse barrel body and used for realizing blow-down action after the vacuum closestool is used, and the pneumatic control actuator is integrated with a pneumatic control delay switch, a water inlet valve, a pneumatic expansion cylinder, a first air valve and a second air valve, so that the whole structure has small volume, has a delay flushing adjusting function and is more convenient to use. The pneumatic control actuator has compact structural design and small occupied space, so that the space utilization and the part configuration during installation are convenient and easy, the investment cost is low, the time consumption of maintenance is low, the cost is relatively low, and the service life can be effectively prolonged by the efficient structural design in the process of putting in use.

As shown in fig. 3, the pneumatic control delay switch 201 includes a valve rod 212, a piston plate 213 fixedly connected to the valve rod 212, and a first return spring 214 for returning the valve rod 212; the side wall of the pneumatic control delay switch 201 is further provided with a pneumatic control interface 215 and a pressure relief port 216 which are respectively positioned at two sides of the piston plate 213, the pneumatic control interface 215 is connected with the output end of a pneumatic control flushing button of the air pipe vacuum toilet, the pressure relief port 216 is connected with the upper part of the distributor 300 through an air pipe, and the piston plate 213 is provided with a through hole 217 for balancing air pressure at two sides. When the pneumatic control flushing button is pressed down, a high-pressure gas is injected into the upper side of the piston plate 213 through the pneumatic control interface 215, pressure difference is generated between two sides of the piston plate 213, the piston plate 213 and the valve rod 212 are driven to move downwards, the valve rod 212 drives the first air valve 205 to be opened, the air pressures on two sides are equal after the piston plate 213 moves downwards, the diameter ratio of the through hole 217 is smaller, the damping effect is achieved, the first return spring 214 can slowly push the piston plate 213 and the valve rod 212 to move upwards only after a certain time, and therefore the function of closing the first air valve 205 in a delayed mode is achieved.

The pneumatic telescopic cylinder 203 further comprises a telescopic air bag communicated with the air cylinder control interface 204, a sliding toggle piece fixed at the movable end of the telescopic air bag, and a second return spring arranged in the telescopic air bag and used for realizing the movement reset of the sliding toggle piece, the side wall of the sliding toggle piece is provided with a first toggle bump and a second toggle bump, the water inlet valve 202 comprises a first lever and a third reset spring, one end of the first lever is matched with the first toggle bump, two sides of the other end of the first lever are respectively matched with the normally closed inner end of the water inlet and the normally open inner end of the water outlet, the second air valve 209 comprises a second lever and a fourth return spring, one end of the second lever is matched with the second toggle bump, and two sides of the other end of the second lever are respectively matched with the inner end of the second input interface 210 in a normally closed mode and the inner end of the second output interface 211 in a normally open mode. When negative pressure is applied to the cylinder control interface 204, the telescopic air bag and the second return spring contract, the sliding toggle piece drives the first lever and the second lever to deflect through the first toggle bump and the second toggle bump, the water inlet valve 202 and the second air valve 209 are opened, flushing and sewage discharging are realized, when air or positive pressure is applied to the cylinder control interface 204, the first lever and the second lever return under the corresponding springs, and the water inlet valve 202 and the second air valve 209 are closed.

As shown in fig. 4, a valve seat 106 is arranged in the middle of the sewage channel 101, a lifting air bag 107 communicated with the sewage valve control interface 105 is arranged inside the vacuum sewage valve 100, the upper end of the lifting air bag 107 is fixedly connected with the vacuum sewage valve 100, a lifting pressure spring is arranged inside the lifting air bag 107, an end cover 108 is arranged at the lower end of the lifting air bag 107, a gate plate 109 hermetically matched with the valve seat 106 is arranged on the end cover 108, a bowl-shaped sealing film gasket 110 is arranged between the valve seat 106 and the flashboard 109, the edge of the bowl-shaped sealing film gasket 110 is fixedly connected with the inner wall of the vacuum blowoff valve 100, the upper surface of the bottom of the bowl-shaped sealing film gasket 110 is fixedly connected with the lower end of the flashboard 109, the top of the vacuum blowoff valve 100 is provided with a blowoff valve control interface 105 communicated with the lifting air bag 107, the side wall of the vacuum blowoff valve 100 is provided with a first air interface 111 communicated with the outside atmosphere, and the first air interface 111 is positioned between the lifting air bag 107 and the bowl-shaped sealing membrane pad 110. When negative pressure is applied to the blowoff valve control interface 105, the lifting air bag 107 and the lifting pressure spring contract, the gate plate 109 on the driving end cover 108 moves upwards, and the bowl-shaped sealing membrane pad 110 turns upwards, so that the conduction of the blowoff channel 101 is realized, when air or positive pressure is applied to the blowoff valve control interface 105, the lifting air bag 107 and the lifting pressure spring extend, the gate plate 109 on the end cover 108 moves downwards, and is matched with the valve seat 106 again, the cutoff of the blowoff channel 101 is realized, and the bowl-shaped sealing membrane pad 110 can fill a gap between the gate plate 109 and the valve seat 106, so that the sealing effect is realized.

The valve seat 106 is provided with a U-shaped sealing convex strip 112 on the middle inner wall, and the flashboard 109 is provided with a U-shaped sealing groove 113 matched with the U-shaped sealing convex strip 112. The U-shaped sealing convex strips 112 and the U-shaped sealing grooves 113 are matched to form a corrugated sealing surface, so that the sealing performance among the bowl-shaped sealing membrane gasket 110, the flashboard 109 and the valve seat 106 is improved, and the function of preventing water leakage is achieved.

The two sides of the flashboard 109 are respectively provided with a clamping hook 114, the upper surface of the bottom of the bowl-shaped sealing membrane pad 110 is fixedly provided with two pull rods 115, and the upper ends of the pull rods 115 are provided with clamping buckles matched and clamped with the clamping hooks 114. The flashboard 109 and the bowl-shaped sealing membrane pad 110 are detachably connected through the pull rod 115 and the clamping hook 114, so that the vacuum blow-off valve is convenient to assemble and disassemble, and the middle deformation of the bowl-shaped sealing membrane pad 110 and the matching of the U-shaped sealing groove 113 and the U-shaped sealing convex strip 112 cannot be influenced.

The vacuum port 104 is provided with a sealing gasket 117, and the sealing gasket 117 penetrates through the side wall of the vacuum sewer valve 100 and is integrally formed with the bowl-shaped sealing membrane gasket 110. The sealing gasket 117 can improve the air tightness at the vacuum port 104, and can also position the bowl-shaped sealing membrane gasket 110 through the vacuum port 104, thereby improving the assembly efficiency.

Vertical guide grooves 118 are formed in two sides of the inner wall of the vacuum blowoff valve 100, and cross rods 116 in sliding fit with the vertical guide grooves 118 are arranged on two sides of the end cover 108. The stability that end cover 108 and flashboard 109 reciprocated can be strengthened in the cooperation of horizontal pole 116 and vertical guide slot 118, improves the sealed complex location sealing accuracy of valve plate 109 and disk seat 106, the circumference distributes on the inner wall of vacuum blowoff valve 100 has a plurality of vertical strengthening rib, and the lower extreme of vertical strengthening rib is equipped with the spacing bayonet socket with the sealed membrane pad 110 edge complex of bowl form. The vertical reinforcing ribs can enhance the structural strength of the valve body of the vacuum blowoff valve 100 and can also compress and fix the upper side edge of the sealing washer 117.

While the utility model has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. A controller of a vacuum toilet, comprising a vacuum sewer valve (100), a pneumatic actuator (200) and a distributor (300) arranged therebetween, characterized in that: a sewage discharge channel (101) is arranged at the bottom of the vacuum sewage discharge valve (100), a sewage inlet interface (102) and a sewage discharge interface (103) are respectively arranged at two ends of the sewage discharge channel (101), the sewage inlet interface (102) and the sewage discharge interface (103) are respectively used for connecting a drainage pan and a vacuum sewage discharge pipeline of the vacuum toilet, a vacuum interface (104) is arranged on the side wall of the sewage discharge interface (103), and a sewage discharge valve control interface (105) is arranged at the top of the vacuum sewage discharge valve (100);

the pneumatic control actuator (200) comprises a pneumatic control delay switch (201), a water inlet valve (202), a pneumatic telescopic cylinder (203), a first air valve (205) and a second air valve (209); the pneumatic control actuator (200) is used for controlling the opening and closing of the water inlet valve (202) and the vacuum blowdown valve (100) to realize flushing and blowdown of a toilet bowl of the vacuum toilet; the pneumatic control delay switch (201) is connected with a pneumatic control flushing button of the vacuum closestool and is used for controlling the intermittent opening and closing of the first air valve (205); the first air valve (205) is provided with a first input interface (206), a second air interface (207) and a first output interface (208) and is used for controlling the expansion and contraction of the pneumatic expansion cylinder (203); the outer wall of the pneumatic telescopic cylinder (203) is provided with a cylinder control interface (204) connected with the first output interface (208), and the pneumatic telescopic cylinder (203) telescopically controls the opening and closing of the water inlet valve (202) and the second air valve (209) through the air pressure change of the cylinder control interface (204); the water inlet valve (202) is provided with a water inlet and a water outlet, the water inlet is connected with a tap water pipeline, and the water outlet is connected with the inner wall of the urinal; the second air valve (209) is provided with a second input interface (210) and a second output interface (211), and the second output interface (211) is connected with the blowdown valve control interface (105) and is used for controlling the opening and closing of the vacuum blowdown valve (100);

the upper part of the distributor (300) is connected with a first input interface (206) and a second input interface (210); the middle part of the distributor (300) is provided with a check valve (301), and the lower part of the distributor (300) is connected with a vacuum interface (104).

2. The controller for a vacuum toilet according to claim 1, wherein: the pneumatic control time delay switch (201) comprises a valve rod (212), a piston plate (213) fixedly connected with the valve rod (212) and a first return spring (214) for realizing the movement return of the valve rod (212); the pneumatic control time delay switch is characterized in that a pneumatic control interface (215) and a pressure relief port (216) which are respectively located on two sides of a piston plate (213) are further arranged on the side wall of the pneumatic control time delay switch (201), the pneumatic control interface (215) is connected through an output end of a pneumatic control flushing button of the air pipe vacuum toilet, the pressure relief port (216) is connected through an air pipe on the upper portion of the distributor (300), and a through hole (217) for balancing air pressure on two sides is formed in the piston plate (213).

3. The controller for a vacuum toilet according to claim 1 or 2, wherein: the pneumatic telescopic cylinder (203) also comprises a telescopic air bag communicated with the air cylinder control interface (204), a sliding toggle piece fixed at the movable end of the telescopic air bag and a second reset spring arranged in the telescopic air bag and used for realizing the movement reset of the sliding toggle piece, a first toggle bump and a second toggle bump are arranged on the side wall of the sliding toggle piece, the water inlet valve (202) comprises a first lever and a third reset spring, one end of the first lever is matched with the first toggle bump, two sides of the other end of the first lever are respectively matched with the normally closed inner end of the water inlet and the normally open inner end of the water outlet, the second air valve (209) comprises a second lever and a fourth return spring, one end of the second lever is matched with the second toggle bump, and two sides of the other end of the second lever are respectively matched with the normally closed inner end of the second input interface (210) and the normally open inner end of the second output interface (211).

4. The controller for a vacuum toilet according to claim 1 or 2, wherein: the middle part of the sewage discharge channel (101) is provided with a valve seat (106), the inside of the vacuum sewage discharge valve (100) is provided with a lifting air bag (107) communicated with a sewage discharge valve control interface (105), the upper end of the lifting air bag (107) is fixedly connected with the vacuum sewage discharge valve (100), the inside of the lifting air bag (107) is provided with a lifting pressure spring, the lower end of the lifting air bag (107) is provided with an end cover (108), the end cover (108) is provided with a flashboard (109) in sealing fit with the valve seat (106), a bowl-shaped sealing membrane pad (110) is arranged between the valve seat (106) and the flashboard (109), the edge of the bowl-shaped sealing membrane pad (110) is fixedly connected with the inner wall of the vacuum sewage discharge valve (100), the upper surface of the bottom of the bowl-shaped sealing membrane pad (110) is fixedly connected with the lower end of the flashboard (109), the top of the vacuum sewage discharge valve (100) is provided with a sewage discharge valve control interface (105) communicated with the lifting air bag (107), the side wall of the vacuum blowoff valve (100) is provided with a first air interface (111) communicated with the outside atmosphere, and the first air interface (111) is positioned between the lifting air bag (107) and the bowl-shaped sealing membrane pad (110).

5. The controller for a vacuum toilet according to claim 4, wherein: the valve seat is characterized in that a U-shaped sealing convex strip (112) is arranged on the inner wall of the middle of the valve seat (106), and a U-shaped sealing groove (113) matched with the U-shaped sealing convex strip (112) is formed in the flashboard (109).

6. The controller for a vacuum toilet according to claim 5, wherein: the two sides of the flashboard (109) are respectively provided with a clamping hook (114), the upper surface of the bottom of the bowl-shaped sealing membrane pad (110) is fixedly provided with two pull rods (115), and the upper ends of the pull rods (115) are provided with clamping buckles matched and clamped with the clamping hooks (114).

7. The controller for a vacuum toilet according to claim 6, wherein: and a sealing gasket (117) is arranged on the vacuum interface (104), and the sealing gasket (117) and the bowl-shaped sealing film gasket (110) are integrally formed.

8. The controller for a vacuum toilet according to claim 5, wherein: vertical guide grooves (118) are formed in two sides of the inner wall of the vacuum blowoff valve (100), and cross rods (116) in sliding fit with the vertical guide grooves (118) are arranged on two sides of the end cover (108).