A pneumatic controller for extracting odor triggered by a pneumatic button

Abstract

The present invention relates to an air-controlled controller for deodorization triggered by an air-controlled button, comprising a shell and an executive control component installed inside the shell; a control interface, an air interface, an input interface and an output interface are arranged on the outer wall of the shell; the executive control component comprises an upper valve core component, a middle valve core component and a lower valve core component which intermittently connect the input interface with the input interface through the air pressure change of the control interface; the present invention is suitable for vacuum toilets with deodorization function and vacuum toilets with two-in-one functions of deodorization and flushing, solves the problems of deodorization and detoxification through inching control, adopts an integrated structural design, has few parts and high reliability; the control interface is used to connect with the control button to realize the air pressure change at the control interface, so that the executive control component moves, and then intermittently connects the input interface with the input interface. Since the input interface is used to connect with a vacuum source, effective deodorization action can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of vacuum sewage collection, transportation and treatment technology, wherein vacuum sewage collection technology refers to a front-end device or product for collecting sewage at the sewage source, including but not limited to various kitchens (such as toilets, urinals, shower rooms, bathtubs, etc.) and sanitary products (such as vegetable sinks, dishwashers, etc.); vacuum sewage transportation technology refers to the relevant technology of efficiently transporting sewage collected by front-end devices or products to sewage post-treatment equipment; vacuum sewage treatment technology refers to post-treatment equipment or devices, the main function of which is to separate and purify the centralized collected sewage into solids and liquids, wherein the solid can be made into organic fertilizer, and the sewage can be filtered and purified by MBR membrane technology to achieve green discharge. The present invention particularly relates to an air-controlled controller for extracting odor gas triggered by an air-controlled button used in a vacuum toilet. Background Art

[0002] In the field of vacuum domestic sewage collection, transportation and treatment technology, vacuum domestic sewage collection is the most advanced technology. Its basic implementation principle is as follows: First, the sewage collection inlet pipeline (or sewage discharge inlet pipeline) in the vacuum sewage transportation system is connected to various sewage front-end collection equipment, including but not limited to various kitchens (such as toilets, urinals, shower rooms, bathtubs, etc.) and sanitary products (such as vegetable sinks, dishwashers, etc.); secondly, the vacuum pump group generates vacuum in the vacuum sewage transportation system; finally, during the operation of the sewage front-end collection equipment, after the vacuum sewage valve is connected, the pressure difference between the external atmospheric pressure and the vacuum value inside the pipeline in the vacuum sewage transportation system is applied to the sewage and mixed with air to realize turbulent transportation of sewage to the sewage collection inlet pipeline (or sewage discharge inlet pipeline).

[0003] As we all know, the characteristic of the vacuum sewage discharge system is that the vacuum toilet will simultaneously suck a large amount of air into the vacuum conveying pipe system during the sewage discharge process. This technical feature has a certain effect on purifying the air in the bathroom.

[0004] Viruses in the air are transported to farther places through the flow of airflow and stick to the surface of related objects, greatly expanding the scope of virus transmission. Therefore, in addition to the core function of noise reduction, the detoxification function puts higher requirements on the use of toilets in residents' bathrooms. It requires that the toxic gases released by patients near the toilet and the residual gases in the air can be efficiently discharged, such as the toxic gases in the air caused by patients coughing and vomiting in the bathroom. However, under normal circumstances, residents will encounter other problems during use. For example, the owner smokes in the bathroom, especially when the wife is pregnant, and the smell of smoke cannot be everywhere in the bathroom. The diffusion effect of opening windows for ventilation will be affected by windless weather, while the use of exhaust fans will increase energy consumption and noise, which is inconsistent with this theme, namely noise reduction; other situations also include the problem of dealing with the smell released by vomiting on the toilet due to excessive drinking.

[0005] It is worth noting that patients sometimes discharge some feces that release odor when using the toilet. In the above process, when people stand up, the odor remaining in the toilet body will be diffused to other places in the bathroom around the toilet under the action of the airflow generated when the human body changes from sitting to standing, causing the whole bathroom to stink. In terms of how to solve the problem of odor polluting the entire bathroom, there are currently three known technical solutions or solutions:

[0006] First, add an exhaust fan or ventilation fan to the bathroom.

[0007] Generally, this problem can be solved by opening windows for ventilation or turning on exhaust fans. However, the odor released from feces may contain pathogenic bacteria that spread not only throughout the bathroom but also through exhaust pipes and windows to pollute a wider area. This solution is not conducive to the use of hospital facilities with highly contagious virus patients.

[0008] Second, extend the time for vacuuming and sewage discharge.

[0009] The solution to prolonging the time of vacuuming and drainage is to increase the time of vacuum toilets. The advantages of this method are simplicity and low cost, but its disadvantages are also obvious, because the use of this solution increases the energy consumption of the vacuum drainage system, and the operation and maintenance costs increase, especially in projects where vacuum toilets are used in large numbers, such as hotels, the increase in energy efficiency will be more obvious; moreover, another disadvantage of extending the drainage time is that it affects the frequency of toilet use, increases the waiting time for toilet use, and reduces the level of humanized service.

[0010] What is more serious is that the current technical solution for extending the pumping and drainage of sewage from a vacuum toilet is to delay the working time of a controller in the vacuum toilet. The specific usage of the known technical solution is to press the flush button of the vacuum toilet immediately after using the toilet, then quickly leave the bathroom and close the bathroom door, and then the vacuum toilet starts flushing after a certain delay. Since a huge flushing noise is generated when the toilet is flushed, it is not suitable to wait in the bathroom during the delayed drainage process of the vacuum toilet. The consequence of this situation is that the probability of having to queue up at the bathroom door is greatly increased, and the degree of humanization is low.

[0011] Third, optimize the noise reduction and deodorization channels.

[0012] At present, the noise reduction technology of vacuum toilets is a hot spot and difficulty in development. The basic solution is to use a sealed toilet cover and an air supply channel. You can refer to other patents of the first inventor at the same time. The air supply channel basically replenishes air in the water inlet area of ​​the toilet body, and the air enters from the bottom or the lower rear side of the toilet body. Some technical solutions are that the supplementary air directly enters the toilet body, and other technical solutions are that the supplementary air also enters the vacuum sewage valve with air supply function.

[0013] Moreover, the known technical solution (refer to 2000-US6128789A, 2002-EP0778432B1, etc.) is that when the toilet lid is closed, air enters from the bottom of the toilet and then enters the toilet body and the vacuum drain valve respectively; a major disadvantage of this technical solution is that it is not conducive to timely elimination of the odor released by human defecation, because after using the toilet, the toilet lid must be closed first, and then the flush button is pressed, and then the person leaves the bathroom. This usage process is mainly due to the huge flushing noise generated during the flushing process, and long-term stay will cause personal health problems, which is not very humane.

[0014] In order to solve the problem of exhausting odor in special circumstances (smoking, vomiting, and defecation in the toilet), it is necessary to add an independent odor extraction pipeline to the vacuum toilet body, and at the same time replenish air in the relative direction, but the controllers in the prior art currently only have the following types;

[0015] First, purely mechanical type: reference patents include CN1201057C and US6128789. The controller mainly utilizes a lever mechanism and a cam mechanism for control.

[0016] Second, gas-controlled: There are two types of controllers:

[0017] (1) Single-button controllers, such as CN101107405A, CN200680003008.7, CN201580081233.1, US5069243, US4373838, US4171853, US5570715;

[0018] (2) Two-button controller, such as 202010655551.7 and 202010710038.3 large and small water two-button controllers and their vacuum sewage systems.

[0019] These controllers all have the function of delaying connection when pressed and being in the disconnected state when not pressed, but do not have the function of inching control. At the same time, the controllers used in vacuum toilets in the prior art cannot effectively solve the problems of odor extraction and detoxification due to the unreasonable structural design. Therefore, the present invention has developed an air-controlled controller for odor extraction triggered by an air-controlled button to solve the problems existing in the prior art. After searching, no technical solutions identical or similar to the present invention were found. Summary of the invention

[0020] The purpose of the present invention is to provide an air-controlled controller for extracting odors triggered by an air-controlled button, so as to solve the problem that the controllers used in vacuum toilets in the prior art cannot effectively solve the problem of extracting odors and detoxifying, and at the same time solve the problem that the controller cannot effectively realize inching control due to unreasonable structural design.

[0021] The technical solution of the present invention is: an air-controlled controller for deodorizing gas triggered by an air-controlled button, comprising a shell and an execution control component installed inside the shell; a control interface, an air interface, an input interface and an output interface are provided on the outer wall of the shell; the execution control component comprises an upper valve core component, a middle valve core component and a lower valve core component which intermittently connect the input interface and the output interface through changes in the air pressure of the control interface.

[0022] Preferably, the shell is provided with an installation chamber for the upper valve core assembly, the middle valve core assembly and the lower valve core assembly to be installed and move in coordination from top to bottom, and the internal side is provided with an air flow channel, an exhaust pipe and a throttling pipe connected to the installation chamber; the control interface is connected to the upper end of the installation chamber and is arranged on the side wall of the upper end of the shell; the air interface, the input interface and the output interface are all arranged on the lower end surface of the shell, the air interface is connected to the air flow channel, the input interface is connected to the lower end of the installation chamber, and the output interface is connected to the exhaust pipe and the throttling pipe.

[0023] Preferably, the installation chamber includes a first cavity, a second cavity, a third cavity and a fourth cavity arranged in sequence from top to bottom; a first inner hole is arranged at the upper end of the first cavity, a second inner hole is arranged between the first cavity and the second cavity, a third inner hole is arranged between the second cavity and the third cavity, and a fourth inner hole is arranged between the third cavity and the fourth cavity; the upper valve core assembly is arranged in the first inner hole and the first cavity, including an upper valve stem and a pressure plate arranged in an integral structure, and a first return spring arranged below the pressure plate; the upper valve stem is plugged into the first inner hole, the pressure plate is arranged in the first cavity, and the first cavity is divided into a first upper chamber and a first lower chamber; the middle valve core assembly includes a middle valve stem and a second return spring, the middle valve stem The plug-in is fitted in the second inner hole, and the upper and lower ends extend to the first cavity and the second cavity respectively; the lower valve core assembly includes a lower valve stem, a corrugated diaphragm fixed to the upper end of the lower valve stem, and a third return spring; the lower valve stem passes through the third inner hole, and the upper and lower ends extend to the second cavity and the third cavity respectively, and the lower end realizes the opening and closing of the fourth inner hole by movement; the corrugated diaphragm is arranged in the second cavity, and divides the second cavity into a second upper chamber and a second lower chamber; the air flow channel is connected with the first upper chamber, the first lower chamber and the fourth cavity; the exhaust pipeline is connected with the output interface and the second lower chamber, and the throttling pipeline is connected with the second lower chamber and the side wall of the second inner hole; the control interface is connected with the first inner hole, and the input interface is connected with the third cavity.

[0024] Preferably, a notch A is provided on the side wall of the upper end portion of the middle valve stem for connecting the first lower chamber with the second upper chamber when the middle valve stem moves to align with the second inner hole, and a vent hole is provided at the lower end portion for connecting the second upper chamber with the throttling pipeline when the middle valve stem moves to align with the side wall of the second inner hole; and a notch B is provided on the side wall of the lower valve stem for connecting the second lower chamber with the third cavity when the middle valve stem moves to align with the third inner hole.

[0025] Preferably, the first cavity, the second cavity, the third cavity, the first inner hole, the second inner hole, the third inner hole, the fourth inner hole, the upper valve core assembly, the middle valve core assembly and the lower valve core assembly are all coaxially arranged, the upper end of the second upper chamber is provided with a guide inner strip plate, and the upper end of the lower valve stem is provided with a guide outer strip plate that cooperates with the guide inner strip plate sleeve and can realize coaxial relative movement.

[0026] Preferably, a needle valve assembly for controlling the gas flow rate is horizontally arranged at one end of the throttling pipeline that is biased toward the second lower chamber.

[0027] Preferably, the first return spring and the second return spring are both located in the first lower chamber, and are used to respectively realize upward return of the first valve stem and the second valve stem; the third return spring is located in the second lower chamber, and is used to realize upward return of the third valve stem.

[0028] Preferably, sealing components are provided between the upper valve stem and the first inner hole, between the middle valve stem and the second inner hole, between the lower valve stem and the third inner hole, and in the fourth inner hole for cooperating with the lower end of the lower valve stem to achieve sealing.

[0029] Preferably, the sealing assembly includes an annular sealing ring arranged between the upper valve stem and the first inner hole, a lip sealing ring arranged between the middle valve stem and the second inner hole, an O-ring arranged between the lower valve stem and the third inner hole, and a rubber plug arranged in the fourth inner hole.

[0030] Compared with the prior art, the advantages of the present invention are:

[0031] (1) The present invention is applicable to vacuum toilets with deodorization function and vacuum toilets with deodorization and flushing functions. It is easy to use and can solve the deodorization and toxin removal problems through inching control. The air control controller is an integrated structure with fewer parts and higher reliability. The control interface is used to connect with the trigger component of the peripheral device (such as the air control button) and change the air pressure at the control interface to realize the axial movement of the execution control component, thereby intermittently connecting the input interface with the input interface. The input interface is used to connect with the vacuum source. When the input interface is connected with the input interface, effective deodorization and toxin removal can be realized. The gas flows and is discharged along the input interface, the third cavity, the second lower chamber, the air extraction pipeline and the input interface in sequence.

[0032] (2) The gas control controller involved in the present invention does not require the use of an electric power source, such as a battery pack, a solar panel, a cable, and a transformer, and can achieve control directly through the change in air pressure at the control interface. The overall structure has low energy consumption and strong adaptability.

[0033] (3) The reset speeds of the upper valve core assembly, the middle valve core assembly and the lower valve core assembly are gradually reduced, the reset speed of the upper valve core assembly is higher than that of the middle valve core assembly, and the reset speed of the middle valve core assembly is higher than that of the lower valve core assembly. At the same time, the delayed reset of the lower valve core assembly can be adjusted by the needle valve assembly. Compared with the traditional valve core damping structure, the damping adjustment must be disassembled and then assembled to achieve adjustment. The present invention can be adjusted directly by the needle valve assembly without disassembly, and is more convenient to use.

[0034] (4) The applicable occasions for deodorization include but are not limited to the acidic gas from vomit after drinking, smoke from smoking, and the odor of waste excretion when using the toilet. During the deodorization process, the noise is much smaller than the noise of vacuum toilet sewage discharge.

[0035] (5) The sealing of the overall structure is achieved through a sealing assembly, that is, the upper valve stem and the first inner hole are sealed by an annular sealing ring, the middle valve stem and the second inner hole are sealed by a lip sealing ring, the lower valve stem and the third inner hole are sealed by an O-ring, and the fourth inner hole is opened and closed by the lower end of the lower valve stem and the rubber plug, so that the overall structural design is more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0037] Figure 1 This is a front view of a gas-controlled controller for extracting odor gas triggered by a gas-controlled button according to the present invention;

[0038] Figure 2 A bottom view of a gas-controlled controller for extracting odor gas triggered by a gas-controlled button according to the present invention;

[0039] Figure 3 It is a cross-sectional view of a gas-controlled controller for extracting odor gas triggered by a gas-controlled button according to the present invention;

[0040] Figure 4 is a cross-sectional view of the housing of the present invention;

[0041] Figure 5 It is a structural schematic diagram of the execution control component of the present invention;

[0042] Figure 6 It is a cross-sectional view of a gas-controlled controller for extracting odors triggered by a gas-controlled button according to the present invention along a vertical plane where the central axis of the gas extraction pipeline is located;

[0043] Figure 7 A partial cross-sectional view of the air extraction pipeline distribution of the present invention;

[0044] Figure 8 It is a 1 / 4 cross-sectional structural diagram of the lower shell of the present invention;

[0045] Fig. 9 It is an enlarged view of the local structure of the throttling pipeline and the vent hole of the present invention;

[0046] Fig.10 is a cross-sectional view of the middle valve stem of the present invention;

[0047] Fig.11 It is a structural schematic diagram of the lower valve stem of the present invention;

[0048] Fig.12 It is a cross-sectional view of a gas-controlled controller for extracting odor gas triggered by a gas-controlled button according to the present invention in a non-working state;

[0049] Fig.13This is a flow diagram of the internal circuits of a gas-controlled controller for extracting odors triggered by a gas-controlled button in a non-working state according to the present invention (wherein the dotted line is the air flow circuit diagram, and the solid line is the vacuum source exhaust circuit diagram);

[0050] Fig.14 It is a flow diagram of the internal circuit of a gas-controlled controller for extracting odors triggered by a gas-controlled button in the working state of the present invention (wherein the dotted line is the air circulation circuit diagram, and the solid line is the odor extraction circuit diagram);

[0051] Fig.15 It is a flow diagram of the internal circuits when the air-controlled controller for extracting odor triggered by the air-controlled button of the present invention is in working state, the upper valve core assembly is reset, and the middle valve core assembly and the lower valve core assembly are not reset (wherein the dotted line is the air flow circuit diagram, and the solid line is the odor extraction circuit diagram);

[0052] Fig.16 This is an internal circuit flow diagram of a pneumatic controller for deodorization triggered by a pneumatic button of the present invention, when the upper valve core assembly and the middle valve core assembly are reset, and the lower valve core assembly is not reset (the dotted line is the air flow circuit diagram, and the solid line is the deodorization and vacuum extraction circuit diagram).

[0053] Wherein: 1. Shell;

[0054] 11. upper housing, 12. first middle housing, 13. second middle housing, 14. lower housing, 15. control interface, 16. output interface, 17. air interface, 18. input interface;

[0055] 161, air extraction pipeline, 162, throttling pipeline;

[0056] 2. Install the chamber;

[0057] 21. first cavity, 22. second cavity, 23. third cavity, 24. fourth cavity, 25. first inner hole, 26. second inner hole, 27. third inner hole, 28. fourth inner hole, 29. air flow channel;

[0058] 211, first upper chamber, 212, first lower chamber;

[0059] 221, second upper chamber, 222, second lower chamber;

[0060] 3. Execution control component;

[0061] 31. Upper valve core assembly;

[0062] 311, upper valve stem, 312, pressure plate, 313, first return spring;

[0063] 321, middle valve stem, 322, second return spring, 323, notch A, 324, vent hole;

[0064] 331, lower valve stem, 332, corrugated diaphragm, 333, third return spring, 334, notch B;

[0065] 4. Sealing components;

[0066] 41. annular sealing ring, 42. lip sealing ring, 43. o-ring, 44. rubber plug;

[0067] 5. Needle valve assembly. DETAILED DESCRIPTION

[0068] The present invention is further described in detail below in conjunction with specific embodiments:

[0069] like Figure 1-3 As shown, an air-controlled controller for deodorizing gas triggered by an air-controlled button comprises a shell 1 and an execution control assembly 3 arranged inside the shell 1; a control interface 15, an air interface 17, an input interface 18 and an output interface 16 are arranged on the outer wall of the shell 1; the execution control assembly 3 comprises an upper valve core assembly 31, a middle valve core assembly 32 and a lower valve core assembly 33 which realize intermittent connection between the input interface 18 and the output interface 16 through the air pressure change of the control interface 15.

[0070] More specifically, combined Figure 1-3 As shown, the shell 1 is a columnar structure. To facilitate the processing of the internal chamber, it includes an upper shell 11, a first middle shell 12, a second middle shell 13 and a lower shell 14 arranged in sequence from top to bottom. The upper shell 11, the first middle shell 12, the second middle shell 13 and the lower shell 14 are coaxially fixedly connected by long rod screws, and an installation chamber 2 is formed inside for the upper valve core assembly 31, the middle valve core assembly 32 and the lower valve core assembly 33 to be installed and moved from top to bottom. An air flow channel 29, an exhaust pipeline 161 and a throttling pipeline 162 connected to the installation chamber 2 are arranged on the internal side; as shown in FIG. Figure 4 As shown, the installation chamber 2 includes a first cavity 21, a second cavity 22, a third cavity 23 and a fourth cavity 24 which are arranged in sequence from top to bottom; a first inner hole 25 is arranged at the upper end of the first cavity 21, a second inner hole 26 is arranged between the first cavity 21 and the second cavity 22, a third inner hole 27 is arranged between the second cavity 22 and the third cavity 23, and a fourth inner hole 28 is arranged between the third cavity 23 and the fourth cavity 24.

[0071] Combination Figure 3 , Figure 5As shown, the upper valve core assembly 31 is arranged in the first inner hole 25 and the first cavity 21, including an upper valve stem 311 and a pressure plate 312 arranged in an integral structure, and a first return spring 313 arranged below the pressure plate 312; the upper valve stem 311 is plugged into the first inner hole 25, and the pressure plate 312 is arranged in the first cavity 21, and the first cavity 21 is divided into a first upper chamber 211 and a first lower chamber 212; the middle valve core assembly 32 includes a middle valve stem 321 and a second return spring 322, and the middle valve stem 321 is plugged into the second inner hole 26 The lower valve core assembly 33 includes a lower valve stem 331, a corrugated diaphragm 332 fixed to the upper end of the lower valve stem 331, and a third return spring 333; the lower valve stem 331 passes through the third inner hole 27, and the upper and lower ends extend to the second cavity 22 and the third cavity 23 respectively, and the lower end realizes the opening and closing of the fourth inner hole 28 by movement; the corrugated diaphragm 332 is arranged in the second cavity 22, and divides the second cavity 22 into a second upper chamber 221 and a second lower chamber 222.

[0072] The details of the connection between the interface on the outside of the housing 1 and the internal chamber are as follows:

[0073] Combination Figure 1 , Figure 2 As shown, the control interface 15 is arranged at the side wall of the upper end of the housing 1, and the air interface 17, the input interface 18 and the output interface 16 are all arranged on the lower end surface of the output housing 1, wherein the control interface 15 is used to connect with the trigger component of the external device (such as the air control button) and change the air pressure at the control interface 15; the output interface 16 is used to connect with the vacuum source, and when the input interface 18 is connected with the output interface 16, the air extraction action is realized; the control interface 15 is connected with the upper end of the installation chamber 2, and the control interface 15 is connected with the first inner hole 25; as shown Figure 4 As shown, the air interface 17 is connected to the air flow channel 29, and the air flow channel 29 is connected to the first upper chamber 211, the first lower chamber 212 and the fourth cavity 24; the output interface 16 is connected to the exhaust pipeline 161 and the throttling pipeline 162, as shown in FIG. Figure 6-8 As shown, the exhaust pipe 161 is arranged on the inner side of the second middle shell 13 and the lower shell 14, the lower end of the exhaust pipe 161 is connected to the output interface 16, and the upper end is connected to the second lower chamber 222; Fig. 9 As shown, the throttling pipeline 162 is arranged on the inner side of the first middle shell 12 and the second middle shell 13, the lower end is connected to the second lower chamber 222, the upper end is connected to the side wall of the second inner hole 26, and the lower end is biased toward the second lower chamber 222. The needle valve assembly 5 for controlling the gas flow rate is arranged in the horizontal direction; the input interface 18 is connected to the lower end of the installation chamber 2, that is, connected to the third cavity 23; further, as Fig.10As shown, a notch A323 is provided on the side wall of the upper end of the middle valve stem 321 for realizing the communication between the first lower chamber 212 and the second upper chamber 221 when the middle valve stem 321 moves to align with the second inner hole 26, and a vent hole 324 is provided on the lower end for realizing the communication between the second upper chamber 221 and the throttling pipeline 162 when the middle valve stem 321 moves to align with the side wall of the second inner hole 26. When the middle valve stem 321 is in the reset state, the throttling pipeline 162 is connected to the vent hole 324; Fig.11 As shown, a notch B334 is provided on the side wall of the lower valve stem 331 for realizing the communication between the second lower chamber 222 and the third cavity 23 when the lower valve stem 331 moves to align with the third inner hole 27 .

[0074] The first cavity 21, the second cavity 22, the third cavity 23, the first inner hole 25, the second inner hole 26, the third inner hole 27, the fourth inner hole 28, the upper valve core assembly 31, the middle valve core assembly 32 and the lower valve core assembly 33 are all coaxially arranged, the upper end of the second upper chamber 221 is provided with a guide inner strip plate, and the upper end of the lower valve stem 331 is provided with a guide outer strip plate that cooperates with the guide inner strip plate sleeve and can realize coaxial relative movement; the first return spring 313 and the second return spring 322 are both located in the first lower chamber 212, and are respectively used to realize the upward reset of the first valve stem and the second valve stem; the third return spring 333 is located in the second lower chamber 222, and is used to realize the upward reset of the third valve stem.

[0075] like Figure 6 As shown, in order to ensure the sealing performance of the structure, a sealing assembly 4 is provided between the upper valve stem 311 and the first inner hole 25, between the middle valve stem 321 and the second inner hole 26, between the lower valve stem 331 and the third inner hole 27, and in the fourth inner hole 28 for cooperating with the lower end of the lower valve stem 331 to achieve sealing; the sealing assembly 4 includes an annular sealing ring 41 arranged between the upper valve stem 311 and the first inner hole 25, a lip sealing ring 42 arranged between the middle valve stem 321 and the second inner hole 26, an O-ring 43 arranged between the lower valve stem 331 and the third inner hole 27, and a rubber plug 44 arranged in the fourth inner hole 28.

[0076] When the present invention is installed, the control interface 15 is used to connect with an external trigger component (such as a gas control button), and the gas pressure change at the control interface 15 is realized by the gas control button. At the same time, the output interface is connected to the vacuum source to facilitate air extraction. The specific working state and the working principle under each working state are as follows:

[0077] (1) In the non-working state, the gas control button connected to the control interface 15 is in a non-pressed state;

[0078] The air interface 17 is connected to the first upper chamber 211 and the first lower chamber 212 through the air flow channel 29. Fig.12As shown, the upper valve stem 311 rises and resets to the highest point under the action of the first reset spring 313, and the middle valve stem 321 rises and resets to the highest point under the action of the second reset spring 322. At the same time, under the action of the lip sealing ring 42, the first lower chamber 212 and the second upper chamber 221 are not connected, so the air in the first lower chamber 212 cannot enter the second upper chamber 221; at the same time, the lower valve stem 331 rises and resets to the top under the action of the third reset spring 333, and the lower end of the lower valve stem 331 detaches from the rubber plug 44 and blocks the third inner hole 27, blocking the third cavity 23 and the second lower chamber 222. At this time, the input interface 18 and the output interface 16 are not connected.

[0079] In this state, if Fig.13 As shown, air is introduced into the air interface 17 and can enter the first upper chamber 211 and the first lower chamber 212 along the air flow channel 29; at the same time, the air vent 324 in the middle valve stem 321 is connected with the throttling line 162, so that the second upper chamber 221 is connected with the second lower chamber 222. Since the second lower chamber 222 is connected to the output interface 16 through the exhaust line, and the output interface 16 is connected to the vacuum source, the vacuum degree is maintained in the second upper chamber 221 and the second lower chamber 222.

[0080] (2) In the working state, the gas control button is pressed to the bottom;

[0081] After the air control button is pressed, the air pressure in the first inner hole 25 connected to the control interface 15 increases, thereby overcoming the spring force of the first return spring 313 and the second return spring 322, and realizing the downward movement of the upper valve stem 311 and the middle valve stem 321; after the lower end of the middle valve stem 321 contacts the upper end of the lower valve stem 331, the air pressure in the first inner hole 25 continues to overcome the spring force of the first return spring 313, the second return spring 322 and the third return spring 333, and the upper valve stem 311, the middle valve stem 321 and the lower valve stem 331 all descend to the bottom; when the lower valve stem 331 is at the bottom, the lower end of the lower valve stem 331 blocks the rubber plug 44, thereby disconnecting the connection between the air interface 17 and the third cavity 23.

[0082] At the same time, Fig.14 As shown, since a notch B334 is provided at the side wall of the lower valve stem 331, the notch B334 is aligned with the third inner hole 27 when the lower valve stem 331 moves to the bottom, and is not aligned with the third inner hole 27 when the lower valve stem 331 is at the upper end, the notch B334 realizes the communication between the second lower chamber 222 and the third cavity 23; furthermore, the output interface 16 is connected to the second lower chamber 222, so that the input interface 18 is connected to the output interface 16. The solid line in the figure is the flow path of the gas during the air extraction process, and the dotted line is the air circulation path. A more detailed connection line diagram during the air extraction process can be combined with Figure 7 , Figure 8 As shown by the dotted line in the figure, point M in the figure is the same position. At this time, since the output interface 16 is connected to the vacuum source, the vacuum action can be performed.

[0083] (3) In the working state, the upper valve stem 311 rebounds quickly to the initial state, and the middle valve stem 321 slowly rises and resets. At this time, the rising and resetting speed of the middle valve stem 321 is faster than the rising and resetting speed of the lower valve stem 331;

[0084] like Fig.15 As shown, after the air control button is pressed and the hand is released, the upper valve stem 311 quickly rebounds to the initial state under the action of the first return spring 313, and the middle valve stem 321 slowly rises and resets under the action of the second return spring 322. The performance requirement between the first return spring 313 and the second return spring 322 is that the rising speed of the middle valve stem 321 is faster than the rising and resetting speed of the lower valve stem 331, especially when the lower valve stem 331 has not yet completely reset and risen, the middle valve stem 321 has already reset; during the process of the middle valve stem 321 resetting and rising, the middle valve stem 321 is lifted and lowered. During the process, the air interface 17 is connected with the first upper chamber 211 and the first lower chamber 212 through the air flow channel 29. In the process of the middle valve stem 321 rising and returning to the highest point from the lowest point under the action of the second return spring 322, the notch A323 on the side wall of the middle valve stem 321 is always opposite to the second inner hole 26, thereby ensuring that the first lower chamber 212 is connected with the second upper chamber 221, and then the air inside the first lower chamber 212 enters the second upper chamber 221, so that the second upper chamber 221 is maintained at atmospheric pressure.

[0085] At the same time, in the process of the middle valve stem 321 moving down to the bottom, and in the process of rising and resetting from the bottom under the action of the second return spring 322, the upper end of the throttling pipeline 162 is offset from the vent hole 324 inside the middle valve stem 321 to achieve closure; thereby ensuring that the air pressure in the second upper chamber 221 changes from the negative pressure in the non-working state to atmospheric pressure; as the middle valve stem 321 continues to rise, the notch A323 on the side wall of the middle valve stem 321 leaves the mating position of the lip sealing ring 42, ultimately ensuring that the air in the first lower chamber 212 will not enter the second upper chamber 221.

[0086] (4) In the working state, the upper valve stem 311 and the middle valve stem 321 are lifted and reset under the action of the first return spring 313 and the second return spring 322;

[0087] like Fig.16As shown, as the middle valve stem 321 continues to rise, after the middle valve stem 321 rises to the top, the throttling line 162 is connected to the vent hole 324, and the needle valve assembly 5 starts to work at this time. Since the throttling line 162 is connected to the second upper chamber 221 and the second lower chamber 222, and both are connected to the vacuum source, the exhaust action is realized. The only difference is that it takes time for the air pressure inside the second upper chamber 221 to drop from atmospheric pressure to negative pressure, and this time is adjusted and controlled by the needle valve assembly 5; by manually adjusting the needle valve assembly 5, the reset speed of the lower valve stem 331 can be controlled, thereby realizing the delayed closing function of the air control controller.

[0088] More importantly, without affecting the operation of the air-controlled controller, especially without disassembling the air-controlled controller, the needle valve assembly 5 can be adjusted anytime and anywhere to control the delay time, instead of the known technology that requires disassembling the controller and replacing related parts to realize the controller delay adjustment control function. Therefore, the adjustment efficiency is high, the labor cost is low, the labor intensity is low, and the degree of humanization is high.

[0089] (5) The working state is restored to the initial state, and the lower valve stem 331 is lifted and reset under the action of the third return spring 333;

[0090] Due to the throttling speed regulating effect of the needle valve assembly 5, the corrugated diaphragm 332 is subjected to a certain pressure difference. The spring force of the third reset spring 333 overcomes the pressure generated by the pressure difference of the lower valve core assembly 33, and begins to reset and rise. As the pressure difference on both sides of the corrugated diaphragm 332 gradually decreases, the rising speed of the lower valve stem 331 gradually decreases until it reaches zero; when the lower valve stem 331 is completely reset, the input pipeline 18 and the output pipeline 16 are disconnected, and the odor extraction action stops at this time.

[0091] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A gas-controlled controller for extracting odor triggered by a gas-controlled button, characterized in that: It includes a housing and an execution control assembly installed inside the housing; a control interface, an air interface, an input interface and an output interface are arranged on the outer wall of the housing; the execution control assembly includes an upper valve core assembly, a middle valve core assembly and a lower valve core assembly which intermittently connect the input interface and the output interface through the air pressure change of the control interface; An installation chamber is provided inside the shell for the upper valve core assembly, the middle valve core assembly and the lower valve core assembly to be installed and move in coordination from top to bottom, and an air flow channel, an air extraction pipeline and a throttling pipeline connected to the installation chamber are provided on the internal side; the control interface is connected to the upper end of the installation chamber and is arranged at the side wall of the upper end of the shell; the air interface, the input interface and the output interface are all arranged on the lower end surface of the shell, the air interface is connected to the air flow channel, the input interface is connected to the lower end of the installation chamber, and the output interface is connected to the air extraction pipeline and the throttling pipeline; The installation chamber includes a first cavity, a second cavity, a third cavity and a fourth cavity arranged in sequence from top to bottom; a first inner hole is arranged at the upper end of the first cavity, a second inner hole is arranged between the first cavity and the second cavity, a third inner hole is arranged between the second cavity and the third cavity, and a fourth inner hole is arranged between the third cavity and the fourth cavity; The upper valve core assembly is arranged in the first inner hole and the first cavity, and includes an upper valve stem and a pressure plate arranged in an integrated structure, and a first return spring arranged below the pressure plate; the upper valve stem is plugged and fitted in the first inner hole, and the pressure plate is arranged in the first cavity, and the first cavity is divided into a first upper chamber and a first lower chamber; The middle valve core assembly includes a middle valve stem and a second return spring. The middle valve stem is inserted and fitted in the second inner hole, and the upper and lower ends extend into the first cavity and the second cavity respectively. The lower valve core assembly includes a lower valve stem, a corrugated diaphragm fixed to the upper end of the lower valve stem, and a third return spring; the lower valve stem passes through the third inner hole, and the upper and lower ends extend to the second cavity and the third cavity respectively, and the lower end realizes the opening and closing of the fourth inner hole by movement; the corrugated diaphragm is arranged in the second cavity, and divides the second cavity into a second upper chamber and a second lower chamber; the air flow channel is connected with the first upper chamber, the first lower chamber and the fourth cavity; the exhaust pipeline is connected with the output interface and the second lower chamber, and the throttling pipeline is connected with the second lower chamber and the side wall of the second inner hole; the control interface is connected with the first inner hole, and the input interface is connected with the third cavity; Among them, a notch A is provided on the side wall of the upper end of the middle valve stem for connecting the first lower chamber with the second upper chamber when the middle valve stem moves to align with the second inner hole, and a vent hole is provided at the lower end for connecting the second upper chamber with the throttling pipeline when the middle valve stem moves to align with the side wall of the second inner hole; a notch B is provided at the side wall of the lower valve stem for connecting the second lower chamber with the third cavity when the middle valve stem moves to align with the third inner hole; A sealing assembly is provided between the upper valve stem and the first inner hole, between the middle valve stem and the second inner hole, between the lower valve stem and the third inner hole, and in the fourth inner hole used to cooperate with the lower end of the lower valve stem to achieve blocking; A needle valve assembly for controlling the gas flow rate is arranged in the horizontal direction at one end of the throttling pipeline that is biased toward the second lower chamber; The first return spring and the second return spring are both located in the first lower chamber, and are used to respectively realize the upward return of the first valve stem and the second valve stem; the third return spring is located in the second lower chamber, and is used to realize the upward return of the third valve stem.

2. The gas-controlled controller for extracting odors triggered by a gas-controlled button according to claim 1, characterized in that: The first cavity, the second cavity, the third cavity, the first inner hole, the second inner hole, the third inner hole, the fourth inner hole, the upper valve core assembly, the middle valve core assembly and the lower valve core assembly are all coaxially arranged, the upper end of the second upper chamber is provided with a guide inner strip plate, and the upper end of the lower valve stem is provided with a guide outer strip plate that cooperates with the guide inner strip plate sleeve and can realize coaxial relative movement.

3. The gas-controlled controller for extracting odors triggered by a gas-controlled button according to claim 2, characterized in that: The sealing assembly includes an annular sealing ring arranged between the upper valve stem and the first inner hole, a lip sealing ring arranged between the middle valve stem and the second inner hole, an O-ring arranged between the lower valve stem and the third inner hole, and a rubber plug arranged in the fourth inner hole.

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