Carbon canister with an external filter

Abstract

The utility model relates to the technical field of engine accessories, specifically disclose a carbon tank of add-on external filter, including carbon tank body, the inner chamber of carbon tank body includes the mixed cavity one, mixed cavity two and separation cavity that communicate in proper order, the top of one side of carbon tank body interval and fixedly set up air inlet part and external filter, and external filter and mixed cavity one are linked together, and one side fixedly set up leak detection pump of air inlet part, and the atmospheric pipeline is fixedly set up on leak detection pump and penetrates, and the one end of atmospheric pipeline is linked together with external filter away from leak detection pump, and separation cavity is divided into adsorption cavity and desorption cavity by partition, and the top of carbon tank body is fixedly set up adsorption pipe and desorption pipe with adsorption cavity and desorption cavity respectively, and adsorption pipe, desorption pipe are linked together with adsorption cavity, desorption cavity respectively. The utility model discloses an external filter can filter the air before entering the carbon tank, and can reduce the failure rate of carbon tank and leak detection pump.

Description

Technical Field

[0001] This utility model relates to the field of engine parts technology, and specifically discloses a carbon canister with an external filter. Background Technology

[0002] The carbon canister is a core component of the automotive fuel evaporation control system. It is filled with activated carbon with strong adsorption capacity. Its main function is to collect and temporarily store fuel vapors that evaporate from the fuel tank, preventing them from being directly emitted into the atmosphere and causing pollution. At the appropriate time, these vapors are sent to the engine for combustion, thereby achieving the goals of energy saving, environmental protection and improved fuel economy. It is widely used in the automotive industry and other internal combustion engine fields.

[0003] Because the outside air contains a large amount of dust and other foreign matter, existing engines are prone to malfunctions or even failures of the carbon canister and leak detection pump after prolonged combustion, which seriously affects the service life of the carbon canister. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a carbon canister with an external filter to solve the problem that the carbon canister and leakage detection pump are prone to malfunction or even failure after the engine has been burning for a long time.

[0005] The technical solution adopted by this utility model to solve its technical problem is: The carbon canister with an external filter includes a carbon canister body. The inner cavity of the carbon canister body includes a mixing chamber one, a mixing chamber two, and a separation chamber connected in sequence. An air inlet and an external filter are fixedly installed at intervals on the top of one side of the carbon canister body. The external filter is connected to the mixing chamber one. A leak detection pump is fixedly installed on one side of the air inlet. An atmospheric pipe is installed through and fixedly installed on the leak detection pump. The end of the atmospheric pipe away from the leak detection pump is connected to the external filter. The separation chamber is divided into an adsorption chamber and a desorption chamber by a partition plate. An adsorption tube and a desorption tube are fixedly installed on the top of the carbon canister body in conjunction with the adsorption chamber and the desorption chamber, respectively. The adsorption tube and the desorption tube are connected to the adsorption chamber and the desorption chamber, respectively.

[0006] Furthermore, an air inlet is fixedly provided on one side of the air intake section, and the air inlet is connected to the air intake section.

[0007] Furthermore, an air intake channel is fixedly installed on the side of the external filter closest to the atmospheric duct, and the external filter is connected to the atmospheric duct through the air intake channel.

[0008] Furthermore, an exhaust channel is fixedly provided on the side of the external filter near the mixing chamber, and the external filter is connected to the mixing chamber through the exhaust channel.

[0009] Furthermore, a coarse filter layer is fixedly installed at one end of the inner cavity of the external filter near the air intake channel, and the outer surface of the coarse filter layer is uniformly provided with several through holes spaced apart.

[0010] Furthermore, a filter element is fixedly snapped into the inner cavity of the external filter on the side away from the air intake channel, and an isolation layer is spaced out on the outer surface of the filter element, with the isolation layer fixedly installed inside the external filter.

[0011] Furthermore, the leak detection pump includes a fixing rod fixedly installed at one end near the air inlet, and a fixing block is fixedly installed at the end of the fixing rod near the air inlet.

[0012] Furthermore, the outer surface of the fixing rod is fitted with a fixing ring 1 and a fixing ring 2 at intervals, and the outer diameter of the fixing ring 1 is smaller than the outer diameter of the fixing ring 2. The outer walls of the fixing ring 1 and the fixing ring 2 are respectively uniformly and at intervals provided with a number of limiting blocks 1 and a number of limiting blocks 2.

[0013] Furthermore, the inner side of the air intake section near the leak detection pump is provided with several slots for several limit blocks 1 and several limit blocks 2, and the limit blocks 1 and several limit blocks 2 can be fixedly engaged in the slots respectively.

[0014] Furthermore, the end of the adsorption tube furthest from the carbon canister body is connected to the fuel tank, and the end of the desorption tube furthest from the carbon canister body is connected to the engine.

[0015] The beneficial effects of this utility model are: This invention uses an external filter to filter the air before it enters the carbon canister, removing dust and other foreign matter to ensure the cleanliness of the air entering the carbon canister. It also reduces the failure rate of the carbon canister and leak detection pump, extends the service life of the carbon canister, and reduces the vehicle's later maintenance costs. The external filter of this invention has a simple structure, is easy to replace, has good filtration effect, and is perfectly compatible with the carbon canister. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the external filter of this utility model; Figure 4 This is a cross-sectional view of the external filter of this utility model; Figure 5 This is a schematic diagram of the carbon canister body, leak detection pump, and atmospheric pipeline of this utility model. Figure 6 for Figure 5A magnified structural diagram of point A in the middle.

[0017] In the diagram: 1. Carbon canister body; 101. Mixing chamber one; 102. Mixing chamber two; 103. Separation chamber; 104. Adsorption chamber; 105. Desorption chamber; 2. Air inlet; 3. External filter; 301. Air inlet channel; 302. Exhaust channel; 303. Coarse filter layer; 304. Filter element; 305. Isolation layer; 4. Leakage detection pump; 401. Fixing block; 402. Fixing ring one; 403. Fixing ring two; 404. Limiting block one; 405. Limiting block two; 5. Atmospheric pipeline; 6. Adsorption pipe; 7. Desorption pipe; 8. Air inlet. Detailed Implementation

[0018] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0019] Example 1 like Figure 1-6 As shown, the carbon canister with an external filter includes a carbon canister body 1. The inner cavity of the carbon canister body 1 includes a mixing chamber 101, a mixing chamber 2 102, and a separation chamber 103 connected in sequence. An air inlet 2 and an external filter 3 are fixedly installed at intervals on the top of one side of the carbon canister body 1. The external filter 3 is connected to the mixing chamber 101. A leak detection pump 4 is fixedly installed on one side of the air inlet 2. An atmospheric pipe 5 is installed through and fixedly installed on the leak detection pump 4. The end of the atmospheric pipe 5 away from the leak detection pump 4 is connected to the external filter 3. The separation chamber 103 is divided into an adsorption chamber 104 and a desorption chamber 105 by a partition plate. An adsorption tube 6 and a desorption tube 7 are fixedly installed on the top of the carbon canister body 1 to cooperate with the adsorption chamber 104 and the desorption chamber 105, respectively. The adsorption tube 6 and the desorption tube 7 are connected to the adsorption chamber 104 and the desorption chamber 105, respectively.

[0020] This utility model, by setting an external filter 3, can filter the air before it enters the carbon canister, filtering out dust and other foreign objects, ensuring the cleanliness of the air entering the carbon canister, and reducing the failure rate of the carbon canister and the leak detection pump 4, extending the service life of the carbon canister, and reducing the vehicle's later maintenance costs; the external filter 3 of this utility model has a simple structure, is easy to replace, has a good filtration effect, and is perfectly compatible with the carbon canister.

[0021] During operation, air enters the leak detection pump 4 through the intake section 2 and is detected by the leak detection pump 4 to check for leaks. If there are no leaks, the air in the leak detection pump 4 enters the external filter 3 through the atmospheric pipe 5 and is filtered by the external filter 3. The filtered air then enters the mixing chamber 101 and then the mixing chamber 2 102. At this time, the fuel vapor generated by the heating in the fuel tank enters the adsorption chamber 104 through the adsorption pipe 6 and then enters the mixing chamber 2 102 to mix with the air. The mixed air and fuel vapor then enter the desorption chamber 105 together and then enter the engine for combustion through the desorption pipe 7.

[0022] An air inlet 8 is fixedly provided on one side of the air intake section 2, and the air inlet 8 is connected to the air intake section 2. Air enters the air intake section 2 through the air inlet 8.

[0023] An air inlet channel 301 is fixedly installed on the side of the external filter 3 near the atmospheric duct 5, and the external filter 3 is connected to the atmospheric duct 5 through the air inlet channel 301. The air detected by the leak detection pump 4 enters the external filter 3 for filtration through the atmospheric duct 5 and the air inlet channel 301.

[0024] An exhaust channel 302 is fixedly installed on the side of the external filter 3 near the mixing chamber 101, and the external filter 3 is connected to the mixing chamber 101 through the exhaust channel 302. After filtration, the air enters the mixing chamber 101 through the exhaust channel 302.

[0025] A coarse filter layer 303 is fixedly installed at one end of the inner cavity of the external filter 3 near the air intake channel 301. The outer surface of the coarse filter layer 303 has several through holes evenly spaced apart. By setting the coarse filter layer 303, coarse filtration can be performed to intercept large dust particles in the air.

[0026] A filter element 304 is fixedly snapped onto the side of the inner cavity of the external filter 3 away from the air intake channel 301. An isolation layer 305 is spaced and fitted onto the outer surface of the filter element 304, and the isolation layer 305 is fixedly installed inside the external filter 3. By setting the filter element 304, fine filtration can be performed to capture finer dust and particulate matter in the air; the isolation layer 305 is a waterproof and breathable membrane that allows air to pass freely but effectively blocks liquid water from entering, which is crucial for preventing the carbon canister from failing due to water ingress.

[0027] The leak detection pump 4 includes a fixing rod fixedly installed at one end near the air inlet 2, and a fixing block 401 is fixedly installed at the end of the fixing rod near the air inlet 2.

[0028] The outer surface of the fixing rod is fitted with a fixing ring 402 and a fixing ring 403 at intervals, and the outer diameter of the fixing ring 402 is smaller than the outer diameter of the fixing ring 403. The outer walls of the fixing ring 402 and the fixing ring 403 are respectively uniformly and at intervals fixedly provided with a number of limiting blocks 404 and a number of limiting blocks 405.

[0029] The inner side of the air intake 2 near the leak detection pump 4 is provided with several slots for several limiting blocks 1 404 and several limiting blocks 2 405 respectively. The limiting blocks 1 404 and several limiting blocks 2 405 can be fixedly engaged in the slots respectively.

[0030] The end of the adsorption pipe 6 away from the carbon canister body 1 is connected to the fuel tank, and the end of the desorption pipe 7 away from the carbon canister body 1 is connected to the engine.

[0031] Working principle and process: In operation, air enters the intake section 2 through the intake port 8, then enters the leak detection pump 4, which detects any leaks. If no leaks are detected, the air in the leak detection pump 4 enters the external filter 3 through the atmospheric pipe 5 and the intake passage 301, and is filtered sequentially through the coarse filter layer 303, the filter element 304, and the isolation layer 305. The filtered air then enters the mixing chamber 1 101 through the exhaust passage 302, and then enters the mixing chamber 2 102. At this time, the fuel vapor generated by the heating in the fuel tank enters the adsorption chamber 104 through the adsorption pipe 6, and then enters the mixing chamber 2 102 to mix with the filtered air. The mixed air and fuel vapor then enter the desorption chamber 105 together, and enter the engine through the desorption pipe 7 for combustion.

Claims

1. A carbon canister with an external filter, comprising a carbon canister body (1), characterized in that, The inner cavity of the carbon canister body (1) includes a mixing chamber one (101), a mixing chamber two (102) and a separation chamber (103) connected in sequence. An air inlet (2) and an external filter (3) are fixedly installed at intervals on the top of one side of the carbon canister body (1). The external filter (3) is connected to the mixing chamber one (101). A leak detection pump (4) is fixedly installed on one side of the air inlet (2). An atmospheric pipeline (5) is fixedly installed through the leak detection pump (4). The end of the atmospheric pipeline (5) away from the leak detection pump (4) is connected to the external filter (3). The separation chamber (103) is divided into an adsorption chamber (104) and a desorption chamber (105) by a partition plate. An adsorption tube (6) and a desorption tube (7) are fixedly installed at the top of the carbon canister body (1) in conjunction with the adsorption chamber (104) and the desorption chamber (105), respectively. The adsorption tube (6) and the desorption tube (7) are connected to the adsorption chamber (104) and the desorption chamber (105), respectively.

2. The carbon canister with an external filter as described in claim 1, characterized in that, An air inlet (8) is fixedly provided on one side of the air intake (2), and the air inlet (8) is connected to the air intake (2).

3. The carbon canister with an external filter as described in claim 1, characterized in that, An air intake channel (301) is fixedly installed on the side of the external filter (3) near the atmospheric duct (5), and the external filter (3) is connected to the atmospheric duct (5) through the air intake channel (301).

4. The carbon canister with an external filter as described in claim 1, characterized in that, An exhaust channel (302) is fixedly installed on the side of the external filter (3) near the mixing chamber (101), and the external filter (3) is connected to the mixing chamber (101) through the exhaust channel (302).

5. The carbon canister with an external filter according to claim 3, characterized in that, The inner cavity of the external filter (3) is fixedly provided with a coarse filter layer (303) at one end near the air intake channel (301). The outer surface of the coarse filter layer (303) is uniformly provided with several through holes spaced apart.

6. The carbon canister with an external filter according to claim 3, characterized in that, The inner cavity of the external filter (3) is fixedly attached to the side away from the air intake channel (301) with a filter element (304). The outer surface of the filter element (304) is fitted with an isolation layer (305) at intervals. The isolation layer (305) is fixedly installed inside the external filter (3).

7. The carbon canister with an external filter according to claim 1, characterized in that, The leak detection pump (4) includes a fixed rod fixedly installed at one end near the air inlet (2), and a fixed block (401) is fixedly installed at the end of the fixed rod near the air inlet (2).

8. The carbon canister with an external filter according to claim 7, characterized in that, The outer surface of the fixed rod is fitted with a fixed ring 1 (402) and a fixed ring 2 (403) spaced apart and fixedly sleeved. The outer diameter of the fixed ring 1 (402) is smaller than the outer diameter of the fixed ring 2 (403). The outer walls of the fixed ring 1 (402) and the fixed ring 2 (403) are respectively uniformly and spacedly fixedly provided with a number of limiting blocks 1 (404) and a number of limiting blocks 2 (405).

9. The carbon canister with an external filter according to claim 8, characterized in that, The air intake (2) has several slots on the inner side of the end near the leak detection pump (4), which are respectively equipped with several limit blocks 1 (404) and several limit blocks 2 (405). The limit blocks 1 (404) and several limit blocks 2 (405) can be fixedly engaged in the slots respectively.

10. The carbon canister with an external filter according to claim 1, characterized in that, The adsorption tube (6) is connected to the fuel tank at the end furthest from the carbon canister body (1), and the desorption tube (7) is connected to the engine at the end furthest from the carbon canister body (1).

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