Closed air return method for vacuum system exhaust

Abstract

The present invention provides a closed air return method for vacuum system, wherein the vacuum system comprises a dirt collector, a vacuum generating device, a transition tank and a dirt box, wherein the transition tank is arranged on the dirt box, and the dirt collector is connected to the transition tank through a pipeline 1, and is characterized in that a return air outlet is arranged in the dirt box, the return air outlet is connected to the vacuum generating device, and the vacuum generating device is connected to the transition tank; when the vacuum generating device is vacuumed, the extracted gas flows back into the dirt box through the return air outlet, thus forming a closed air return method for vacuum extraction and exhaust. The gas extracted by the vacuum generating device is passed into the dirt box through the return air outlet, thus solving the problem of the prior art that the odor is discharged into the air and pollutes the environment. Furthermore, the refluxed odor is blown toward the bottom valve, and when the bottom valve is a bottom valve, the refluxed odor is blown toward the bottom valve, and the odor and negative pressure cause the bottom valve to close quickly, thereby improving the response speed; after the bottom valve is closed, the odor is continuously blown to ensure the air tightness after the bottom valve is closed.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum sewage removal systems, and more specifically, to a closed air return method for exhaust and extraction of vacuum systems. Background Art

[0002] The vacuum sewage system uses the air pressure difference generated by the flushing system to suck away the dirt in the toilet in the form of air suction to achieve the purpose of reducing the use of flushing water. It includes a toilet combination, a vacuum sewage workstation and a sewage tank connected in sequence. The system needs to maintain pressure for a long time to ensure the vacuum degree in the system. The toilet combination includes multiple toilets, each of which includes a vacuum sewage valve. The vacuum sewage valve is expensive, and such a sewage system has many parts, a large volume, and a complex system, which is not suitable for home use.

[0003] The application number is CN201922152763.9, and the name is a Chinese utility model patent for a modular portable micro-vacuum sanitary washing system. It discloses a modular portable micro-vacuum sanitary washing system, which belongs to the field of sanitary and epidemic prevention technology. The system includes a micro-vacuum module and a squatting module; the cabinet of the micro-vacuum module is equipped with a pressure tank, a vacuum pump and a sewage collection tank, the air inlet of the pressure tank is connected to the vacuum pump, and the air outlet is connected to the sewage collection tank through the air path solenoid valve; the box body of the squatting module is equipped with a squatting pan, and one end is equipped with a second toilet water outlet interface, a second sewage collection interface, a wastewater interface, and a second wash drainage interface; the first toilet water outlet interface and the second toilet water outlet interface of the micro-vacuum module and the squatting module, the first sewage collection interface and the second sewage collection interface, and the first wash drainage interface and the second wash drainage interface are connected by flexible pipes. The utility model system has a simple structure, convenient assembly and disassembly, and is convenient to unfold, withdraw and transport. It has the functions of toilet, washing and showering, and because of the micro-vacuum negative pressure suction, it is convenient to collect excrement and save water. This patent is provided with a vacuum pump to generate vacuum and a pressure tank to maintain pressure, and the structure is complex and the volume is large.

[0004] The application number is CN202011395303.X, and the name is a Chinese invention patent for a suction and drainage method and device for online air extraction-on-site gravity sewage discharge. It discloses an online air extraction-on-site gravity sewage discharge suction and drainage method, which includes a container connected to the sewage outlet of the toilet, and a normally closed sewage outlet that can be opened by the gravity of the wastewater generated by a defecation is set at the bottom of the container. The sewage outlet is connected to the wastewater storage tank set on the spot, and an air extraction combination is set at the top of the container. By opening the air extraction combination for a short time, negative pressure can be formed in the container, thereby driving the wastewater in the toilet to be discharged to the wastewater storage tank through the container. The patent sets a normally closed gravity sewage discharger. After the sewage is sucked into the container, the normally closed gravity sewage discharger is opened by relying on the gravity of the sewage, and the sewage is discharged. The deficiency of this patent is that when the air extraction combination is evacuated, the odor in the container and the pipeline is discharged to the outdoors through the air outlet of the air extraction combination, polluting the environment. In particular, when used at home, the odor is discharged around the house, affecting the air quality and bringing inconvenience to life. The deficiency of this patent is also that the gravity dirt discharger is normally closed. In order to ensure that the gravity dirt discharger can be opened under the gravity of the dirt, the angle between the gravity dirt discharger and the container outlet will not be too large. Too small an angle is not conducive to the discharge of dirt, and the dirt is not discharged cleanly, especially some large-volume dirt, such as rags, paper towels, etc., because the angle of the gravity dirt discharger is not enough, it is impossible to discharge the larger dirt, causing blockage. If there is dirt in the feed port and the container, the air extraction combination will suck the dirt into the air extraction combination when evacuating, affecting the performance of the air extraction combination. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a closed air return method for vacuum system exhaust gas, which can recover and utilize the odor in the vacuum sewage system, in view of the deficiencies in the prior art.

[0006] The above-mentioned purpose of the present invention is achieved by the following technical solutions:

[0007] A closed air return method for exhaust and extraction of a vacuum system, the vacuum system comprising a dirt collector, a vacuum generating device, a transition tank and a dirt box, the transition tank being arranged on the dirt box, the dirt collector being connected to the transition tank via a pipeline, an air return outlet being arranged in the dirt box, the air return outlet being connected to the vacuum generating device, and the vacuum generating device being connected to the transition tank; when the vacuum generating device is evacuated, the extracted gas flows back into the dirt box via the air return outlet, forming a closed air return method for exhaust and extraction of a vacuum.

[0008] The dirt collector, vacuum generator, transition tank and dirt box in the vacuum system of the present invention form a connected system. The dirt is collected by the dirt collector, and the vacuum generator vacuumizes the system to form a negative pressure. When the negative pressure reaches a certain value, the water seal of the dirt collector is destroyed, and the dirt with water in the dirt collector is sucked in. The dirt enters the transition tank through the pipeline, and the vacuum generator stops vacuuming. The gravity of the dirt and the gravity of the bottom valve open the bottom valve, and the dirt is discharged into the dirt box. In order to make the dirt fall into the dirt box smoothly through the pipeline and not be retained in the pipeline, a transition tank is provided. The transition tank is used to form a vacuum. If there is no transition tank, the dirt will occupy the pipeline, and the vacuum generator cannot form a vacuum in the pipeline, and a vacuum cannot be formed.

[0009] When the vacuum generating device of the present invention is evacuated, the extracted gas flows back into the dirt box, so that the odor extracted by vacuumization does not flow into the outside air. The odor flowing into the dirt box is filtered by the filter and then discharged to the outside, thus avoiding environmental pollution.

[0010] Furthermore, the extracted gas flows back into the sewage tank through the return gas outlet, which means that the gas extracted from the sewage tank, pipeline 1, and transition tank flows back into the sewage tank through the return gas outlet.

[0011] Furthermore, the return air outlet is connected to the vacuum generating device through pipeline 2, and the gas extracted by the vacuum generating device flows back into the dirt box through pipeline 2 and the return air outlet.

[0012] Furthermore, the vacuum generating device is connected to the transition tank via pipeline three, and the gas flows into the sewage tank via the transition tank, pipeline three, the vacuum generating device, and the return air outlet in sequence.

[0013] Furthermore, the vacuum generating device is directly connected to the transition tank, and the gas flows into the sewage tank through the transition tank, the vacuum generating device, and the return air outlet in sequence.

[0014] The vacuum generating device and the transition tank can be integrated or connected through three pipes. When installing the vacuum system of the present invention, the transition tank, the sewage tank, and the vacuum generating device can be installed in an integrated manner to reduce the occupied space; but sometimes affected by the environment, such as in winter in northern my country, the temperature is low, reaching dozens of degrees below zero. At this time, the vacuum generating device and the transition tank can be connected in a split manner. The underground temperature is higher than that on the ground. The transition tank and the sewage tank are buried in the ground as a whole, and the vacuum generating device is installed on the ground. The transition tank and the vacuum generating device are connected by a pipeline.

[0015] Furthermore, an outlet is provided at the bottom of the transition tank, and a bottom valve is installed at the outlet to close the outlet. The bottom valve is a normally closed bottom valve, and the gas flowing back into the sewage tank is blown toward the bottom valve through the return air outlet to ensure the sealing of the bottom valve, thus solving the problem of air intake of the bottom valve.

[0016] Furthermore, an outlet is provided at the bottom of the transition tank, and a bottom valve is installed at the outlet. The bottom valve is a normally open bottom valve. When the vacuum generating device is evacuated, the negative pressure causes the bottom valve to close the outlet; the gas returning to the sewage tank is blown in the direction of closing the bottom valve through the return air outlet, thereby assisting the bottom valve to close quickly.

[0017] When a bottom valve is provided at the bottom of the transition tank, the negative pressure closes the outlet, and the refluxed odor blows the bottom valve, so that the bottom valve closes smoothly and quickly, thereby improving the response speed.

[0018] Furthermore, the negative pressure causing the bottom valve to close the outlet means that when the vacuum generating device is evacuated, the negative pressure causes the bottom valve to rotate toward the outlet to close the outlet.

[0019] Furthermore, after the bottom valve is closed, the gas continues to blow the bottom valve through the return air outlet to ensure the sealing of the bottom valve.

[0020] Furthermore, the vacuum generating device stops pumping vacuum, the return air outlet stops blowing air to the bottom valve, the bottom valve opens, and the dirt quickly falls into the dirt box. The method of the present invention has linkage. After the vacuum generating device is turned on, the return air outlet blows air to the bottom valve at the same time, and the bottom valve is closed; after the vacuum generating device is turned off, the return air outlet stops blowing air to the bottom valve, and the bottom valve opens. The above actions are all executed in sequence, and the controller does not need to control the execution order of the actions.

[0021] The present invention has the following beneficial effects:

[0022] The closed air return method for vacuum system of the present invention passes the gas extracted by the vacuum generating device into the dirt box through the pipeline, which solves the problem of the prior art that the odor is discharged into the air and pollutes the environment. Furthermore, the refluxed odor is blown to the bottom valve. When the bottom valve is the bottom valve of the prior art, the odor is blown to the bottom valve, so that the bottom valve is closed more tightly, ensuring air tightness and preventing air from entering during vacuuming; when the bottom valve is a normally open bottom valve, the refluxed odor is blown to the bottom valve, and the odor and negative pressure cause the bottom valve to close quickly, improving the response speed; after the bottom valve is closed, the odor is continuously blown to ensure the air tightness after the bottom valve is closed, and the odor is used to blow the bottom valve, so as to achieve recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 Schematic diagram of the vacuum system structure of Example 1.

[0025] Figure 2 Schematic diagram of the vacuum system structure of Example 2.

[0026] Figure 3 Schematic diagram of the vacuum system structure of Example 3.

[0027] Figure 4 Schematic diagram of the vacuum system structure of Example 4.

[0028] 1 is a dirt collector, 2 is a vacuum generating device, 3 is a transition tank, 4 is a dirt box, 5 is pipeline one, 6 is pipeline two, 7 is pipeline three, 8 is a bottom valve, and 9 is a return air outlet. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0030] Example 1

[0031] A closed air return method for vacuum system exhaust, such as Figure 1 As shown, the vacuum system includes a dirt collector 1, a vacuum generating device 2, a transition tank 3 and a dirt box 4. The transition tank 3 is arranged on the dirt box 4. The dirt collector 1 is connected to the transition tank 3 through a pipeline 5. A return air outlet 9 is arranged in the dirt box 4. The return air outlet 9 is connected to the vacuum generating device 2, and the vacuum generating device 2 is connected to the transition tank 3. When the vacuum generating device 2 is evacuated, the extracted gas flows back to the dirt box 4 through the return air outlet 9, forming a vacuum extraction and exhaust closed return air method.

[0032] The return air outlet 9 is connected to the vacuum generating device 2 via the second pipeline 6 , and the gas extracted by the vacuum generating device 2 flows back into the sewage tank 4 via the second pipeline 6 and the return air outlet 9 .

[0033] The vacuum generating device 2 is connected to the transition tank 3 via a pipeline 3 7 , and the gas flows into the sewage tank 4 via the transition tank 3 , the pipeline 3 7 , the vacuum generating device 2 , and the return gas outlet 9 in sequence.

[0034] The dirt collector 1, pipeline 5, vacuum generating device 2, transition tank 3, return air outlet 9 and dirt box 4 in the vacuum system described in this embodiment form a connected system. The dirt is collected by the dirt collector 1, and the vacuum generating device 2 evacuates the system to form a negative pressure. When the negative pressure reaches a certain value, the water seal of the dirt collector 1 is destroyed, and the dirt with water in the dirt collector 1 is sucked in. The dirt enters the transition tank 3 through the pipeline 5, and the vacuum generating device 2 stops evacuating. Under the gravity of the dirt and the bottom valve, the bottom valve 8 opens, and the dirt is discharged into the dirt box 4.

[0035] The second pipeline 6 returns the extracted gas to the dirt box 4, so that the odor extracted by vacuum does not flow into the outside air. The odor flowing into the dirt box 4 is filtered by the filter and then discharged to the outside, avoiding environmental pollution.

[0036] Example 2

[0037] A closed air return method for vacuum system exhaust, such as Figure 2 As shown, the vacuum system includes a dirt collector 1, a vacuum generating device 2, a transition tank 3 and a dirt box 4. The transition tank 3 is arranged on the dirt box 4. The dirt collector 1 is connected to the transition tank 3 through a pipeline 5. A return air outlet 9 is arranged in the dirt box 4. The return air outlet 9 is connected to the vacuum generating device 2, and the vacuum generating device 2 is connected to the transition tank 3. When the vacuum generating device 2 is evacuated, the extracted gas flows back to the dirt box 4 through the return air outlet 9, forming a vacuum extraction and exhaust closed return air method.

[0038] The return air outlet 9 is connected to the vacuum generating device 2 via the second pipeline 6 , and the gas extracted by the vacuum generating device 2 flows back into the sewage tank 4 via the second pipeline 6 and the return air outlet 9 .

[0039] The vacuum generating device 2 is connected to the transition tank 3 via a pipeline 3 7 , and the gas flows into the sewage tank 4 via the transition tank 3 , the pipeline 3 7 , the vacuum generating device 2 , and the return gas outlet 9 in sequence.

[0040] The bottom of the transition tank 3 is provided with an outlet, and a bottom valve 8 is installed at the outlet to close the outlet. The bottom valve 8 is a normally closed bottom valve. The gas returning to the sewage tank 4 is blown toward the bottom valve 8 through the return air outlet 9 to ensure the sealing of the bottom valve 8.

[0041] The bottom valve 8 in this embodiment is a normally closed bottom valve. When the bottom valve is in the closed state, it may not be pressed tightly enough. In this embodiment, the vacuumed odor is utilized. The extracted odor is blown toward the bottom valve 8 through the return air outlet 9 via the pipeline 2 6 to press the bottom valve 8 tightly and ensure air tightness. The method described in this embodiment can not only realize the odor reflux to avoid air pollution, but also use the odor to assist the bottom valve 8 to be pressed tightly.

[0042] Example 3

[0043] A closed air return method for vacuum system exhaust, such as Figure 3 As shown, the vacuum system includes a dirt collector 1, a vacuum generating device 2, a transition tank 3 and a dirt box 4. The transition tank 3 is arranged on the dirt box 4. The dirt collector 1 is connected to the transition tank 3 through a pipeline 5. A return air outlet 9 is arranged in the dirt box 4. The return air outlet 9 is connected to the vacuum generating device 2, and the vacuum generating device 2 is connected to the transition tank 3. When the vacuum generating device 2 is evacuated, the extracted gas flows back to the dirt box 4 through the return air outlet 9, forming a vacuum extraction and exhaust closed return air method.

[0044] The return air outlet 9 is connected to the vacuum generating device 2 via the second pipeline 6 , and the gas extracted by the vacuum generating device 2 flows back into the sewage tank 4 via the second pipeline 6 and the return air outlet 9 .

[0045] The vacuum generating device 2 is connected to the transition tank 3 via a pipeline 3 7 , and the gas flows into the sewage tank 4 via the transition tank 3 , the pipeline 3 7 , the vacuum generating device 2 , and the return gas outlet 9 in sequence.

[0046] The bottom of the transition tank 3 is provided with an outlet, and a bottom valve 8 is installed at the outlet. The bottom valve 8 is a normally open bottom valve. When the vacuum generating device 2 is evacuated, the negative pressure causes the bottom valve 8 to close the outlet; the gas flowing back into the sewage tank 4 is blown in the direction of closing the bottom valve 8 through the return air outlet 9, and the bottom valve 8 is assisted to close quickly.

[0047] Negative pressure causes the bottom valve 8 to close the outlet means that when the vacuum generating device 2 is evacuated, the negative pressure causes the bottom valve 8 to rotate toward the outlet to close the outlet.

[0048] After the bottom valve 8 is closed, the gas continues to blow the bottom valve 8 through the return air pipeline 9 to ensure the sealing of the bottom valve 8.

[0049] The vacuum generating device 2 stops pumping vacuum, the return air outlet 9 stops blowing air to the bottom valve 8, the bottom valve 8 opens, and the dirt quickly falls into the dirt box 4 8.

[0050] The bottom valve 8 of this embodiment is a normally open bottom valve. When the vacuum generating device 2 evacuates the system, the bottom valve 8 is closed under the action of negative pressure. At the same time, the odor discharged by vacuuming is blown toward the bottom valve 8 through the return air outlet 9, forming a thrust to assist the bottom valve 8 in closing, so that the bottom valve 8 is quickly closed, thereby improving the response speed. When the negative pressure destroys the water seal, the dirt is sucked away under the action of the negative pressure, and the dirt reaches the bottom valve 8 through the pipeline 1 5 and the transition tank 3. The vacuum generating device 2 stops evacuating, and the return air outlet 9 stops blowing. The gravity of the dirt knocks the bottom valve 8 open, and the dirt is discharged into the dirt box 4. The method described in this embodiment has linkage. After the vacuum generating device 2 is turned on, the bottom valve 8 is closed, and the return air outlet 9 blows air to the bottom valve 8; after the vacuum generating device 2 is closed, the return air outlet 9 stops blowing air to the bottom valve 8, and the bottom valve 8 is opened. The above actions are all performed in sequence, and the controller is not required to control the execution order of the actions.

[0051] Example 4

[0052] A closed air return method for vacuum system exhaust, such as Figure 4 As shown, the vacuum system includes a dirt collector 1, a vacuum generating device 2, a transition tank 3 and a dirt box 4. The transition tank 3 is arranged on the dirt box 4. The dirt collector 1 is connected to the transition tank 3 through a pipeline 5. A return air outlet 9 is arranged in the dirt box 4. The return air outlet 9 is connected to the vacuum generating device 2, and the vacuum generating device 2 is connected to the transition tank 3. When the vacuum generating device 2 is evacuated, the extracted gas flows back to the dirt box 4 through the return air outlet 9, forming a vacuum extraction and exhaust closed return air method.

[0053] The vacuum generating device 2 is directly connected to the transition tank 3 , and the gas flows into the sewage tank 4 through the transition tank 3 , the vacuum generating device 2 , and the return gas outlet 9 in sequence.

[0054] The vacuum generating device 2 is connected to the transition tank 3 via a pipeline 3 7 , and the gas flows into the sewage tank 4 via the transition tank 3 , the pipeline 3 7 , the vacuum generating device 2 , and the return gas outlet 9 in sequence.

[0055] The bottom of the transition tank 3 is provided with an outlet, and a bottom valve 8 is installed at the outlet. The bottom valve 8 is a normally open bottom valve. When the vacuum generating device 2 is evacuated, the negative pressure causes the bottom valve 8 to close the outlet; the gas flowing back into the sewage tank 4 is blown in the direction of closing the bottom valve 8 through the return air outlet 9, and the bottom valve 8 is assisted to close quickly.

[0056] Negative pressure causes the bottom valve 8 to close the outlet means that when the vacuum generating device 2 is evacuated, the negative pressure causes the bottom valve 8 to rotate toward the outlet to close the outlet.

[0057] After the bottom valve 8 is closed, the gas continues to blow the bottom valve 8 through the return air pipeline 9 to ensure the sealing of the bottom valve 8.

[0058] The vacuum generating device 2 stops evacuating, the return air outlet 9 stops blowing air to the bottom valve 8, the bottom valve 8 opens, and the dirt quickly falls into the dirt box 4.

[0059] The vacuum generating device 2 of this embodiment is directly connected to the transition tank 3. The vacuum generating device 2, the transition tank 3 and the sewage tank 4 are integrated. The gas flows into the sewage tank 4 through the transition tank 3, the vacuum generating device 2, the pipeline 2 6 and the return air outlet 9 in sequence. The path for the vacuum generating device 2 to absorb the gas becomes shorter, thereby improving the system response speed.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims

1. A closed air return method for exhaust and exhaust of a vacuum system, wherein the vacuum system comprises a dirt collector, a vacuum generating device, a transition tank and a dirt box, wherein the transition tank is arranged on the dirt box, and the dirt collector is connected to the transition tank through a pipeline 1, characterized in that: A return air outlet is provided in the sewage box, and the return air outlet is connected to the vacuum generating device, and the vacuum generating device is connected to the transition tank; when the vacuum generating device is evacuated, the extracted gas flows back into the sewage box through the return air outlet, forming a vacuum extraction and exhaust closed return air method; an outlet is provided at the bottom of the transition tank, and a bottom valve is installed at the outlet, and the bottom valve is a normally open bottom valve. When the vacuum generating device is evacuated, the negative pressure causes the bottom valve to close the outlet; the gas flowing back into the sewage box is blown in the direction of closing the bottom valve through the return air outlet, and the bottom valve is assisted to close quickly.

2. The closed exhaust and return method for a vacuum system according to claim 1, characterized in that: The extracted gas flows back into the dirt box through the return gas outlet, which means that the gas extracted from the dirt box, pipeline 1, and transition tank flows back into the dirt box through the return gas outlet.

3. The closed exhaust and return method for a vacuum system according to claim 1, characterized in that: The return air outlet is connected to the vacuum generating device through pipeline 2, and the gas extracted by the vacuum generating device flows back into the dirt box through pipeline 2 and the return air outlet.

4. The closed exhaust and return method for a vacuum system according to claim 1, characterized in that: The vacuum generating device is connected to the transition tank through pipeline three, and the gas flows into the sewage box through the transition tank, pipeline three, the vacuum generating device and the return gas outlet in sequence.

5. The closed exhaust and return method for a vacuum system according to claim 1, characterized in that: The vacuum generating device is directly connected to the transition tank, and the gas flows into the sewage box through the transition tank, the vacuum generating device and the return gas outlet in sequence.

6. The closed exhaust and return method for a vacuum system according to claim 1, characterized in that: Negative pressure causes the bottom valve to close the outlet means that when the vacuum generating device is evacuated, the negative pressure causes the bottom valve to rotate toward the outlet to close the outlet.

7. The closed exhaust and return method for a vacuum system according to claim 1, characterized in that: After the bottom valve is closed, the gas continues to blow the bottom valve through the return air outlet to ensure the sealing of the bottom valve.

8. The closed exhaust and return method for a vacuum system according to claim 1, characterized in that: The vacuum generating device stops pumping vacuum, the return air outlet stops blowing air to the bottom valve, the bottom valve opens, and the dirt quickly falls into the dirt box.

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