Vacuum toilet delay controller and delay system

Abstract

The utility model provides a vacuum closestool time delay controller and time delay system, including control terminal, vacuum channel, air channel, first output terminal, second output terminal and switching assembly, vacuum channel is connected vacuum source, air is introduced into the air channel, the control terminal is introduced with gas of different air pressure to control the action of switching assembly. The utility model discloses a vacuum closestool time-delay controller and a time-delay system, one controller can control a vacuum valve and a water inlet valve at the same time, the vacuum cleaning time length of a closestool and the water inlet time length of the water inlet valve can be accurately controlled, and the vacuum closestool time-delay controller and the time-delay system have the advantages of being compact in structural design, small in space occupancy rate, small in variety and number of parts and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum toilets, in particular to a vacuum toilet delay controller and a vacuum toilet delay system. Background Art

[0002] A vacuum toilet creates a vacuum in the entire system. Each toilet in the system must have a vacuum valve that is isolated from the system. When flushing the toilet, this valve is opened, and the contents of the toilet are taken away by the pressure difference with the vacuum station. The vacuum system is maintained by the automatic operation of a vacuum pump. A vacuum toilet generally consists of a vacuum system, a toilet switch, a water inlet valve, a water inlet valve controller, a vacuum valve, and a vacuum valve controller. The vacuum valve controller controls the vacuum valve to open to take away the contents of the toilet, and the water inlet valve controller controls the water inlet valve to open to flush and replenish the toilet.

[0003] In the prior art, the water inlet valve controller and the vacuum valve controller are installed separately, which is costly for the entire vacuum toilet system, occupies a large volume, and has a complex structure. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vacuum toilet delay controller and a delay system. One controller can control the vacuum valve and the water inlet valve at the same time, and can accurately control the vacuum cleaning time of the toilet and the water inlet time of the water inlet valve. It has the advantages of compact structural design, small space occupancy, small number and quantity of parts and components, and high reliability.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a vacuum toilet delay controller, comprising a control end, a vacuum channel, an air channel, a first output end, a second output end and a switching component, wherein the vacuum channel is connected to a vacuum source, air is passed through the air channel, and the control end is passed through gases of different air pressures to control the action of the switching component;

[0006] When normal pressure air is applied to the control end, the switching component operates to connect the first output end and the second output end to the vacuum channel; when vacuum negative pressure is applied to the control end, the switching component operates to connect the first output end to the air channel.

[0007] Furthermore, the controller also includes a plurality of air cavities, namely a first air cavity, a second air cavity, a third air cavity, a fourth air cavity, and a fifth air cavity. The first air cavity is connected to the control end, the second air cavity is connected to the vacuum channel, the third air cavity is connected to the vacuum channel, the fourth air cavity is connected to the first output end, and the fifth cavity is connected to the second output end.

[0008] Furthermore, a check valve is provided between the fourth air cavity and the fifth air cavity. When the fourth air cavity is connected to the vacuum channel, the check valve is opened, and the fourth air cavity, the fifth air cavity, the first output end, and the second output end are all in a vacuum state; when the fourth air cavity is connected to the air channel, the check valve does not operate.

[0009] Furthermore, the switching component includes a diaphragm, a movable shaft and a spring. The diaphragm is arranged between the first air cavity and the second air cavity, and the first air cavity and the second air cavity are not connected to each other. The spring is arranged in the second air cavity and connected to the diaphragm. The head end of the movable shaft is located in the second air cavity and connected to the diaphragm, and the end thereof passes through the third air cavity and is located in the fourth air cavity. The first air cavity and the second air cavity form an air pressure difference, which can drive the diaphragm to drive the movable shaft to move synchronously. The end of the movable shaft moves back and forth between the vacuum conduction position between the vacuum channel and the fourth air cavity and the air conduction position between the air channel and the fourth air cavity.

[0010] Furthermore, a delay mechanism is provided on the passage connecting the first air cavity and the vacuum channel to control the connection time between the vacuum channel and the fourth air cavity, thereby controlling the vacuum output time of the first output end.

[0011] Furthermore, the second output end is connected to the atmosphere port, and a delay mechanism is provided on the passage between the second output end and the atmosphere port to control the vacuum output time of the second output end.

[0012] Furthermore, the delay mechanism includes a plug with a circular cross-section and a valve port, the valve port is arranged on the passage, the plug includes a flow limiting portion and a mounting portion, the mounting portion is mounted on the shell, the flow limiting portion has an inclined surface, and when the flow limiting portion of the plug is screwed into the valve port, a gap for regulating the gas flow is formed between the inclined surface and the valve port.

[0013] Furthermore, the outer periphery of the mounting portion has threads, the plug is mounted on the housing via the threads, and the size of the gap between the flow limiting portion and the valve port is adjusted by rotating the plug.

[0014] Furthermore, sealing rings are provided at the end of the movable shaft and the vacuum connection position, and at the end of the movable shaft and the air connection position, respectively.

[0015] The utility model also provides a vacuum toilet delay system, comprising the vacuum toilet delay controller, a vacuum valve and a water inlet valve, wherein the first output end of the vacuum toilet delay controller is connected to the vacuum valve, and the second output end of the vacuum toilet delay controller is connected to the water inlet valve.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model can realize that one control terminal can control the output of two output terminals at the same time. It has a fully mechanized design, does not require electric drive, and is not restricted in the use and setting area. It also has the advantages of compact structure design, small space occupancy, small number and type of parts, and high reliability.

[0018] (2) The utility model designs two delay mechanisms to accurately control the output time of the two output ends respectively;

[0019] (3) The delay mechanism of the utility model is designed with an inclined surface on the plug, which is more convenient and accurate to calculate compared with the conical plug in the prior art.

[0020] (4) When the utility model is connected to a vacuum system, it will start once. Compared with existing controllers on the market, the utility model starts once more than the prior art products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The structure of the utility model is shown in FIG. Figure 2 (the control end is closed, the first output end and the second output end do not output vacuum);

[0023] Figure 3 The structure of the utility model is shown in FIG. Figure 3 (the control end is turned on to input air, and the first output end and the second output end output vacuum);

[0024] Figure 4 The structure of the utility model is shown in FIG. Figure 4 (the control end is closed, the first output end does not output vacuum, and the second output end still outputs vacuum);

[0025] Figure 5 The structure of the utility model is shown in FIG. Figure 5 (the control end is closed, the first output end does not output vacuum, and the second output end does not output vacuum);

[0026] Figure 6 The structure of the delay mechanism of the utility model is shown in FIG. Figure 1 ;

[0027] Figure 7 The structure of the delay mechanism of the utility model is shown in FIG. Figure 2 ;

[0028] Figure 8 The structure of the delay mechanism of the utility model is shown in FIG. Figure 3 .

[0029] In the figure:

[0030] Control end A1, vacuum channel A2, air channel A3, first output end A4, second output end A5, switching assembly A7, diaphragm A71, movable shaft A72, spring A73, first air cavity a1, second air cavity a2, third air cavity a3, fourth air cavity a4, fifth air cavity a5, vacuum conduction position T1, air conduction position T2, delay mechanism A8, first delay mechanism A81, second delay mechanism A82, plug A83, flow limiting part A831, mounting part A832, inclined surface A833, gap S1, valve port A84, seal A85, sealing ring (A91, A92), atmospheric port A10, check valve A11. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-Figure 5 As shown, this embodiment discloses a vacuum toilet delay controller, including a control terminal A1, a vacuum channel A2, an air channel A3, a first output terminal A4, a second output terminal A5 and a switching component A7, wherein the vacuum channel is connected to a vacuum source, air is passed through the air channel, and gases of different pressures are passed through the control terminal to control the action of the switching component; when normal pressure air is passed through the control terminal, the switching component is actuated to connect the first output terminal and the second output terminal to the vacuum channel; when the control terminal is under vacuum negative pressure, the switching component is actuated to connect the first output terminal to the air channel.

[0033] Specifically, the controller also includes a first air cavity a1, a second air cavity a2, a third air cavity a3, a fourth air cavity a4, and a fifth air cavity a5. The first air cavity is connected to the control end, the second air cavity is connected to the vacuum channel, the third air cavity is connected to the vacuum channel, the fourth air cavity is connected to the first output end, and the fifth cavity is connected to the second output end.

[0034] It should be noted that before the utility model is connected to the vacuum system, that is, the vacuum channel A2 is not connected to the vacuum source, at this time, the first air cavity a1 is at atmospheric pressure, the second air cavity a2 is at atmospheric pressure, the third air cavity a3 is at atmospheric pressure, the fourth air cavity a4 is at atmospheric pressure, and the fifth air cavity a5 is at atmospheric pressure. When the delay controller of the utility model is connected to the vacuum system, the vacuum channel A2 is connected to vacuum negative pressure, and a large amount of vacuum negative pressure quickly flows into the second air cavity a2, forming an air pressure difference with the first air cavity a1, and the switching component A7 moves downward, moving from the air conduction position T2 to the vacuum conduction position T1. The vacuum negative pressure gradually enters the fourth air cavity a4 and the fifth air cavity a5 from the vacuum channel A2, and the fourth air cavity and the fifth air cavity are transformed into a vacuum negative pressure state; in this process, the first air cavity a1 also gradually enters a vacuum negative pressure state, and when the air pressure between the first air cavity and the second air cavity is balanced, the switching component gradually moves from the vacuum conduction position T1 to the air conduction position T2, and when the first air cavity is completely converted to a vacuum negative pressure, the moving shaft stops moving; after the moving shaft stops moving, the utility model is in a stable state after the first access to the vacuum system, and when the control end applies the air normal pressure, the delay controller of the utility model will start. That is to say, when the delay controller of the utility model is connected to the vacuum system, it will start once immediately. Compared with the existing controllers on the market, the utility model starts once more than the existing technology products.

[0035] The delay controller of the utility model is in a stable state, that is, a normal state, after being connected to the vacuum system and started for the first time. The switching component does not operate, the first air cavity a1 is in a vacuum negative pressure state, the second air cavity a2 is in a vacuum negative pressure state, the third air cavity a3 is in a vacuum negative pressure state, the fourth air cavity a4 is in a normal pressure state, the fifth air cavity a5 is in a normal pressure state, the first output end does not output vacuum negative pressure, and the second output end does not output vacuum negative pressure.

[0036] In this embodiment, a check valve A11 is provided between the fourth air cavity a4 and the fifth air cavity a5. When the fourth air cavity is connected to the vacuum channel, the check valve is opened, and the fourth air cavity a4, the fifth air cavity a5, the first output end A4, and the second output end A5 are all in a vacuum state; when the fourth air cavity is connected to the air channel, the check valve does not operate.

[0037] In this embodiment, the switching component A7 includes a diaphragm A71, a movable shaft A72 and a spring A73. The diaphragm is arranged between the first air cavity and the second air cavity, and the first air cavity and the second air cavity are not connected to each other. The spring is arranged in the second air cavity and connected to the diaphragm. The head end of the movable shaft is located in the second air cavity and connected to the diaphragm, and the end thereof passes through the third air cavity and is located in the fourth air cavity. The first air cavity and the second air cavity form an air pressure difference, which can drive the diaphragm to deform, so as to drive the movable shaft to move synchronously. The end of the movable shaft moves back and forth between the vacuum conduction position T1 between the vacuum channel and the fourth air cavity and the air conduction position T2 between the air channel and the fourth air cavity.

[0038] like Figure 2 As shown, when air is applied to the control end A1 (the control end is turned on), the first air cavity is at normal pressure, and the second air cavity is at vacuum negative pressure. A pressure difference is formed between the first air cavity and the second air cavity, and the diaphragm is squeezed by the gas in the first air cavity to deform and displace toward the second air cavity, and at the same time drives the moving shaft to pass through the third air cavity to move toward the inside of the fourth air cavity, and the end of the moving shaft gradually leaves the air conduction position T2 and moves toward the vacuum conduction position T1. The vacuum gradually enters the fourth air cavity from the vacuum channel A2 through the third air cavity, and the fourth air cavity is transformed into a vacuum negative pressure state. In this process, the moving shaft compresses the spring to the maximum; conversely, when the first air cavity gradually restores the vacuum negative pressure, the diaphragm gradually restores its deformation under the reaction force of the spring, and at the same time drives the moving shaft to gradually move from the vacuum conduction position T1 to the air conduction position T2. ​​When the first air cavity is completely restored to the vacuum negative pressure, the moving shaft stops moving.

[0039] Since the vacuum toilet flushing system needs to accurately control the vacuum cleaning time of the toilet and the water inlet time of the water inlet valve, a delay device is often used. These delay devices are either mechanical or solenoid valve. The delay devices are generally installed separately on the vacuum valve control system and the water inlet valve control system. This is costly, occupies more volume, and has a more complicated structure. For this reason, the utility model integrates a delay mechanism on the controller to realize the functions of control and delay on the controller at the same time.

[0040] In some embodiments, a first delay mechanism A81 is provided on the passage connecting the first air cavity and the vacuum channel, and the first delay mechanism is used to control the conduction time between the vacuum channel and the fourth air cavity, thereby controlling the vacuum output time of the first output end.

[0041] In some embodiments, the second output end is connected to the atmosphere port A10, and a second delay mechanism A82 is provided on the passage between the second output end and the atmosphere port, and the second delay mechanism is used to control the vacuum output time of the second output end.

[0042] Specifically, Figure 6-Figure 8 As shown, the first delay mechanism and the second delay mechanism are delay mechanisms A8 with the same structure, including a plug A83 with a circular cross-section (here, a cross-section perpendicular to the axial direction of the plug or the valve port) and a valve port A84, the valve port is arranged on the passage, the plug includes a flow limiting portion A831 and a mounting portion A832, the mounting portion is mounted on the shell, the flow limiting portion has an inclined surface A833, when the flow limiting portion of the plug is screwed into the valve port, a gap S1 for adjusting the gas flow is formed between the inclined surface and the valve port.

[0043] Preferably, in this embodiment, the outer periphery of the mounting portion has threads, the plug is mounted on the housing via the threads, and the size of the gap between the flow limiting portion and the valve port is adjusted by rotating the plug.

[0044] In order to facilitate the accurate calculation of the gas flow rate, since the amount of gas flow rate is determined by the size of the gap, the flow limiting part is designed to be cylindrical rather than conical (most of the existing technologies are designed to be conical), and the valve port is designed to be a matching circular port. A part of the flow limiting part is cut off to form an inclined surface. When the flow limiting part is located at the valve port, gaps of different sizes are formed between the inclined surface and the valve port as the flow limiting part of the plug is at different depths of the valve port.

[0045] In order to facilitate understanding of the advantages of the inclined surface design, the disadvantages of the conical plug in the prior art are first introduced here. The conical plug has different depths in the valve port, and will form annular gaps of different sizes with the valve port. In order to accurately calculate the flow rate, the calculation of the annular gap is somewhat cumbersome. In this embodiment, the flow limiting portion is designed to be a cylindrical shape consistent with the radius of the valve port, and only a part is cut off to form the inclined surface. The part forming the inclined surface will form a gap at the valve port. Figure 8 The gap S1 shown in the figure uses the area ratio of the gap to the valve port cross section. At this time, it is much easier to calculate the flow rate, and it is easier to achieve precise control of the flow rate. Therefore, the designer accurately controls the size of the gap between the flow limiting portion of the plug and the valve port through calculation to control the air pressure change time in the first air cavity, thereby controlling the speed of the moving axis of the switching component moving back and forth, and further controlling the air pressure change time in the fourth air cavity.

[0046] Correspondingly, the valve port of the first delay mechanism is arranged on the passage connecting the first air cavity and the vacuum channel, the plug of the first delay mechanism is threadedly installed in the shell, the flow limiting part is located in the valve port and a gap for adjusting the gas flow is formed between the valve port and the valve port. Since the outer periphery of the mounting part has threads, it is convenient to use the number of threads to adjust the depth of the plug in the valve port, that is, different numbers of threads correspond to different depths of the plug in the valve port, and different depths correspond to gaps of different sizes, so the gap between the flow limiting part and the valve port can be controlled, and the size of the gap determines the amount of gas flux per unit time. When the flow rate is constant, the larger the gap, the more gas flow passes through in the same time, and the faster the time for the gas to fill the first air cavity is; the smaller the gap, the less gas flow passes through in the same time, and the slower the time for the gas to fill the first air cavity is; and the speed of the air pressure change of the first air cavity affects the switching speed of the switching component, and then affects the air pressure change time of the fourth air cavity, so as to control the vacuum negative pressure output time of the first output end.

[0047] Similarly, the valve port of the second delay mechanism 7 is arranged on the passage between the second output end and the atmosphere port. By calculating the gap between the plug of the second delay mechanism and the valve port and adjusting the plug depth, precise control of the vacuum output time of the second output end can be achieved.

[0048] In order to ensure the air tightness of the air cavity, sealing rings (A91, A92) are respectively provided at the end of the moving shaft and the air conduction position T2 and at the end of the moving shaft and the vacuum conduction position T1.

[0049] In order to ensure the air tightness of the air cavity, a seal A85 is provided between the first delay mechanism, the second delay mechanism and the inside of the shell.

[0050] In this embodiment, preferably, the diaphragm is a planar rubber diaphragm.

[0051] The action process of this embodiment is:

[0052] The utility model will start once immediately when it is initially connected to the vacuum system, and then it will be in a stable state, that is, the switching component will not operate;

[0053] When in a stable state, the switching component does not move, the first air cavity and the second air cavity are both in a vacuum negative pressure state, the first output end does not output a vacuum negative pressure, and the second output end does not output a vacuum negative pressure; when the control end is turned on and a large amount of air is quickly filled in, the first air cavity is converted to a normal pressure state, while the second air cavity is in a vacuum negative pressure state, the air pressure balance between the first air cavity and the second air cavity is broken to form an air pressure difference, the diaphragm of the switching component undergoes a deformation displacement toward the inside of the second air cavity, and drives the moving shaft to displace synchronously, the end of the moving shaft moves from the air conduction position T2 between the air channel and the fourth air cavity to the vacuum conduction position T1 between the vacuum channel and the fourth air cavity, the fourth air cavity is filled with a vacuum negative pressure, the first output end outputs a vacuum negative pressure, and at the same time, the check valve is opened under vacuum suction, the fifth air cavity is also filled with a vacuum negative pressure, and the second output end outputs a vacuum negative pressure, thereby, the control end realizes the control of the first output end and the second output end to output a vacuum negative pressure at the same time;

[0054] At this time, the first delay mechanism controls the vacuum channel to continuously input a small amount of vacuum negative pressure into the first air cavity. The duration of the first delay mechanism determines the time for the moving axis to move from the vacuum conduction position T1 to the air conduction position T2, which is also the time for the vacuum negative pressure in the fourth air cavity to be converted to normal pressure, that is, the time for the vacuum negative pressure at the first output end to be output;

[0055] When the fourth air cavity is at normal pressure, the check valve does not open, and the fifth air cavity is still at a vacuum negative pressure state. The second delay mechanism controls the atmosphere port to continuously supply air to the fifth air cavity. The duration of the second delay mechanism determines the time it takes for the fifth air cavity to convert from vacuum negative pressure to normal pressure, which is also the time for the vacuum negative pressure output at the second output end. Under the action of the second delay mechanism, the vacuum negative pressure output time at the second output end is longer than the vacuum negative pressure output time at the first output end.

[0056] The operator only needs to control the gas inflow time of the first delay mechanism and the second delay mechanism, so as to accurately control the time when the first output end outputs the vacuum pressure and the time when the second output end outputs the vacuum pressure.

[0057] Example 2. A vacuum toilet delay system, comprising the vacuum toilet delay controller, vacuum valve and water inlet valve described in Example 1, wherein the first output end of the vacuum toilet delay controller is connected to the vacuum valve, and the second output end of the vacuum toilet delay controller is connected to the water inlet valve.

[0058] The vacuum valve is used to connect the toilet to the vacuum source, and the water inlet valve is used to replenish the water source for the toilet.

[0059] Air is introduced into the control end of the vacuum toilet delay controller, and the switching component inside the controller starts to work. The first output end outputs vacuum negative pressure to the vacuum valve, and the vacuum valve opens to connect the toilet and the vacuum source. At the same time, the second output end outputs vacuum negative pressure to the water inlet valve, and the water inlet valve opens to replenish water for the toilet; the control end closes the air supply, and under the action of the first delay mechanism, the vacuum valve slowly closes, and under the action of the second delay mechanism, the water inlet valve lags behind the vacuum valve and slowly closes.

[0060] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0063] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0065] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A vacuum toilet delay controller, characterized in that: It includes a control end, a vacuum channel, an air channel, a first output end, a second output end and a switching component, wherein the vacuum channel is connected to a vacuum source, air is passed into the air channel, and the control end is passed with gas of different pressures to control the action of the switching component; When normal pressure air is applied to the control end, the switching component operates to connect the first output end and the second output end to the vacuum channel; when vacuum negative pressure is applied to the control end, the switching component operates to connect the first output end to the air channel.

2. The vacuum toilet delay controller according to claim 1, characterized in that: The controller also includes a plurality of air cavities, namely a first air cavity, a second air cavity, a third air cavity, a fourth air cavity, and a fifth air cavity. The first air cavity is connected to the control end, the second air cavity is connected to the vacuum channel, the third air cavity is connected to the vacuum channel, the fourth air cavity is connected to the first output end, and the fifth air cavity is connected to the second output end.

3. The vacuum toilet delay controller according to claim 2, characterized in that: A check valve is provided between the fourth air cavity and the fifth air cavity. When the fourth air cavity is connected to the vacuum channel, the check valve is opened, and the fourth air cavity, the fifth air cavity, the first output end, and the second output end are all in a vacuum state; when the fourth air cavity is connected to the air channel, the check valve does not operate.

4. The vacuum toilet delay controller according to claim 2, characterized in that: The switching component includes a diaphragm, a movable shaft and a spring. The diaphragm is arranged between the first air cavity and the second air cavity, and the first air cavity and the second air cavity are not connected to each other. The spring is arranged in the second air cavity and connected to the diaphragm. The head end of the movable shaft is located in the second air cavity and connected to the diaphragm, and the end thereof passes through the third air cavity and is located in the fourth air cavity. The first air cavity and the second air cavity form an air pressure difference, which can drive the diaphragm to drive the movable shaft to move synchronously. The end of the movable shaft moves back and forth between the vacuum conduction position between the vacuum channel and the fourth air cavity and the air conduction position between the air channel and the fourth air cavity.

5. The vacuum toilet delay controller according to claim 4, characterized in that: A delay mechanism is provided on the passage connecting the first air cavity and the vacuum channel to control the connection time between the vacuum channel and the fourth air cavity, thereby controlling the vacuum output time of the first output end.

6. The vacuum toilet delay controller according to claim 4, characterized in that: The second output end is connected to the atmosphere port, and a delay mechanism is provided on the passage between the second output end and the atmosphere port to control the vacuum output time of the second output end.

7. The vacuum toilet delay controller according to claim 5 or 6, characterized in that: The delay mechanism includes a plug with a circular cross-section and a valve port, the valve port is arranged on the passage, the plug includes a flow limiting portion and a mounting portion, the mounting portion is mounted on the shell, the flow limiting portion has an inclined surface, and when the flow limiting portion of the plug is screwed into the valve port, a gap for adjusting the gas flow is formed between the inclined surface and the valve port.

8. The vacuum toilet delay controller according to claim 7, characterized in that: The outer periphery of the mounting portion is provided with threads, and the plug is mounted on the housing through the threads. The size of the gap between the flow limiting portion and the valve port can be adjusted by rotating the plug.

9. The vacuum toilet delay controller according to claim 4, characterized in that: Sealing rings are respectively provided at the end of the moving shaft and the vacuum conducting position and at the end of the moving shaft and the air conducting position.

10. A vacuum toilet delay system, characterized in that: It comprises the vacuum toilet delay controller, vacuum valve and water inlet valve as described in any one of claims 1 to 9, wherein the first output end of the vacuum toilet delay controller is connected to the vacuum valve, and the second output end of the vacuum toilet delay controller is connected to the water inlet valve.

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