CN115155260B - Commercial vehicle double-parameter electronic air treatment system and dryer regeneration control method - Google Patents
Commercial vehicle double-parameter electronic air treatment system and dryer regeneration control method Download PDFInfo
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- CN115155260B CN115155260B CN202210783348.7A CN202210783348A CN115155260B CN 115155260 B CN115155260 B CN 115155260B CN 202210783348 A CN202210783348 A CN 202210783348A CN 115155260 B CN115155260 B CN 115155260B
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- 230000008929 regeneration Effects 0.000 title claims abstract description 111
- 238000011069 regeneration method Methods 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001035 drying Methods 0.000 claims abstract description 124
- 238000009423 ventilation Methods 0.000 claims abstract description 34
- 239000002274 desiccant Substances 0.000 claims description 38
- 238000004891 communication Methods 0.000 claims description 33
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 239000002808 molecular sieve Substances 0.000 claims description 8
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 8
- 238000013507 mapping Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 9
- 229920006395 saturated elastomer Polymers 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000010354 integration Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/104—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/116—Molecular sieves other than zeolites
Abstract
The invention discloses a commercial vehicle double-parameter electronic air processing system and a dryer regeneration control method, wherein the commercial vehicle double-parameter electronic air processing system comprises an air compressor with an air compressor exhaust port, an air storage tank with an air storage tank vent, a dryer with a drying cavity, a regeneration control assembly communicated with the drying cavity and the air storage tank vent, a controller electrically connected to an engine of a commercial vehicle, an air pressure sensor electrically connected to the controller and a dew point sensor electrically connected to the controller, the air compressor exhaust port is communicated with the drying cavity, the regeneration control assembly can control the ventilation direction of the drying cavity and the air storage tank vent, the air pressure sensor is used for detecting the air storage pressure value of the air storage tank, the controller can obtain the air passing amount of the air storage tank, the dew point sensor is used for detecting the dew point reduction value of the air storage tank, and the air passing amount is used as a main control signal and the dew point reduction value to accurately realize the regeneration control of the dryer.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted air treatment systems, in particular to a commercial vehicle dual-parameter electronic air treatment system and a dryer regeneration control method.
Background
In the electronic air treatment system of the commercial vehicle at present, compressed air discharged by an air compressor needs to be dehydrated through a drying device and then is filled into a working air storage device, after the drying device is saturated, the drying capacity of the compressed air can be greatly reduced, at the moment, the drying device is usually required to be subjected to regeneration ventilation, namely, the air compressor is unloaded to stop introducing damp air into the drying device, meanwhile, the drying air in the air storage device is reversely introduced into the drying device to remove moisture in the drying device, so that the drying capacity is obtained again, however, the existing factors for judging whether the drying device needs regeneration ventilation only need to be carried out through the overair of the drying device, the overair measurement usually needs to be carried out through a vehicle-mounted control board to obtain the rotating speed of an engine, and then the overair value measured by the method and the actual value have a certain deviation according to the rotating speed of the engine, so that the actual overair value cannot be accurately reflected, and the regeneration ventilation of the drying device cannot be accurately controlled.
Disclosure of Invention
The invention mainly aims to provide a dual-parameter electronic air treatment system for a commercial vehicle and a dryer regeneration control method, and aims to solve the problem that in the existing commercial vehicle air treatment system, the regeneration of a drying device only takes the excess air value passing through the drying device as a control signal, so that the regeneration control of the drying device is inaccurate.
In order to achieve the above object, the present invention provides a dual-parameter electronic air treatment system for a commercial vehicle, comprising:
the air compressor is provided with an air compressor exhaust port;
the dryer is provided with a drying cavity, and the air compressor exhaust port is communicated with the drying cavity;
the air storage tank is provided with an air storage tank vent;
the regeneration control assembly is communicated with the drying cavity and the air storage tank air vent, and can control the ventilation direction of the drying cavity and the air storage tank air vent;
the controller is electrically connected to an engine of the commercial vehicle so as to at least acquire the air passing through the air storage tank according to the rotating speed of the engine;
the air pressure sensor is electrically connected to the controller and is used for detecting the air storage pressure value of the air storage tank; the method comprises the steps of,
the dew point sensor is electrically connected to the controller and is used for detecting the dew point reduction value of the air storage tank.
Optionally, the regeneration control assembly includes:
the first communication pipeline is communicated with the drying cavity and the air storage tank air vent, and a one-way conduction valve is arranged on the first communication pipeline and used for controlling the first communication pipeline to conduct from the drying cavity to the air storage tank air vent;
the second communication pipeline is communicated with the drying cavity and the air storage tank vent, and a regeneration on-off valve is arranged on the second communication pipeline and is electrically connected to the controller and used for controlling the on-off of the second communication pipeline; the method comprises the steps of,
and the exhaust valve is used for controlling the air compressor exhaust port and the drying cavity to be communicated to the outside atmosphere.
Optionally, the drying chamber is long extension setting, the both sides wall of length direction of drying chamber is link up respectively and is formed with two dry air vents, one of them dry air vent intercommunication extremely the air compressor machine gas vent, another dry air vent intercommunication extremely first intercommunication pipeline, the both sides wall of width direction of drying chamber is link up respectively and is formed with regeneration gas passing mouth, one of them regeneration gas passing mouth communicates to the second intercommunication pipeline, another regeneration gas passing mouth communicates to discharge valve.
Optionally, the drying cavity is provided with a drying agent component, and the drying agent component sequentially comprises an activated alumina drying agent, a 4A molecular sieve drying agent and a 3A molecular sieve drying agent in the ventilation direction of the two drying air vents;
each regeneration gas passing port comprises three regeneration gas passing ports corresponding to the activated alumina drying agent, the 4A molecular sieve drying agent and the 3A molecular sieve drying agent, wherein the three regeneration gas passing ports of one regeneration gas passing port are jointly communicated to the exhaust valve, and the three regeneration gas passing ports of the other regeneration gas passing port are jointly communicated to the second communication pipeline.
Optionally, the commercial vehicle dual-parameter electronic air processing system further comprises a cut-off electromagnetic valve, wherein the cut-off electromagnetic valve is electrically connected to the controller, and the cut-off electromagnetic valve is provided with two cut-off air ports, one of the cut-off air ports is communicated with the air storage tank air port, and the other cut-off air port is respectively and pneumatically connected to the valve core of the exhaust valve and the pneumatic control part of the air compressor.
The dryer regeneration control method provided by the invention is based on the commercial vehicle double-parameter electronic air treatment system, and comprises the following steps of:
acquiring a gas storage pressure value of the gas storage tank;
when the gas storage pressure value is larger than a preset pressure value, the exhaust valve is controlled to be conducted so that the exhaust port of the air compressor and the drying cavity are communicated to the outside atmosphere;
acquiring the drying air passing amount of the dryer;
when the drying air passing amount is larger than the preset air passing amount, acquiring an actual dew point reduction value of the air storage tank;
when the actual dew point drop value is smaller than a preset dew point drop value, the regeneration on-off valve is controlled to be conducted so that the air storage tank reversely ventilates to the drying cavity;
acquiring a regeneration excess of gas passing through the dryer;
and when the regeneration excess is larger than the final preset volume, controlling the regeneration on-off valve to be disconnected.
Optionally, the dryer regeneration control method further includes determining a final preset volume, the determining the final preset volume including the steps of:
setting an initial preset volume;
acquiring an air inlet pressure value of the air compressor and an atmospheric pressure value of the environment;
and determining the final preset volume according to the initial preset volume, the air inlet pressure value and the atmospheric pressure value.
Optionally, the step of determining the final preset volume according to the initial preset volume, the intake pressure value and the atmospheric pressure value includes:
calculating an actual pressure difference of the intake pressure value and the atmospheric pressure value;
when the actual pressure difference is smaller than a preset pressure difference, selecting the initial preset volume as the final preset volume;
when the actual pressure difference is greater than a preset pressure difference, the calculation formula of the final preset volume determination is as follows: r is R s =(2K-P 1 )*R 0 K, wherein R is S For a final preset volume, R 0 For an initial preset volume, P 1 The intake pressure value is K, and the atmospheric pressure value is K.
Optionally, the step of obtaining the drying excess of the dryer includes:
calculating the initial rotating speed of the air compressor according to the rotating speed of an engine of the commercial vehicle, and determining the initial exhaust rate of the air compressor according to the initial rotating speed;
acquiring an atmospheric pressure value, an atmospheric temperature value and an exhaust back pressure value of an air compressor of the environment, and selecting an air heat capacity ratio corresponding to the atmospheric pressure value according to a preset mapping relation;
calculating a corrected exhaust rate of the air compressor according to the initial exhaust rate, the atmospheric pressure value, the atmospheric temperature value, the exhaust back pressure value and the air heat capacity ratio;
and calculating the drying air passing amount of the air compressor according to the corrected exhaust rate and the drying ventilation duration.
Optionally, a calculation formula for determining the corrected exhaust rate of the air compressor is as follows: q (Q) c =Q 0 *(T/293C p )*K*(p+1)/(p+K)；
Wherein Q is c Correcting the exhaust rate for the air compressor, Q 0 Air compressor primary acquired for comparison of MAP (MAP) of air compressorInitial exhaust rate, C P The air heat capacity ratio at the atmospheric temperature T is the atmospheric pressure value, T is the atmospheric temperature value, and p is the exhaust back pressure.
According to the technical scheme provided by the invention, the gas storage pressure value of the gas storage tank can be monitored in real time through the air pressure sensor so as to judge whether the air storage tank is completely inflated by the air compressor, after the inflation is completed, the rotating speed of the engine obtained in real time by the controller is converted into the rotating speed of the air compressor, the exhaust rate of the air compressor is obtained by comparing with the MAP graph of the air compressor, the air passing through the gas storage tank is obtained after the time integration of the exhaust rate, so that whether the dryer is saturated is primarily judged, after the dryer is primarily judged to be saturated, the actual dew point reduction value of the compressed gas in the gas storage tank is monitored through the dew point sensor, when the monitored actual dew point reduction value is lower than the preset dew point reduction value, the dryer is finally judged to be saturated, the regeneration control assembly is used for controlling the vent of the gas storage tank to reversely vent the drying cavity, the filtered oil in the dryer is separated, the drying capacity of the dryer is restored again, and the accurate water storage tank can be accurately ventilated by controlling the double parameters of the air passing through the air passing rate and the dew point reduction value, so that the problem of the air storage tank can be effectively prevented from being regenerated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a connection structure of an embodiment of a dual-parameter electronic air handling system for a commercial vehicle according to the present invention;
FIG. 2 is a schematic diagram of a connection structure of the dryer and the regeneration control assembly in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the dryer of FIG. 2;
fig. 4 is a graph showing a three-dimensional graph of an exhaust rate of the air compressor of fig. 1;
fig. 5 is a flow chart of steps of a dryer regeneration control method provided by the invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the case where a directional instruction is involved in the embodiment of the present invention, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
In the electronic air treatment system of the commercial vehicle at present, the compressed air discharged by the air compressor 1 needs to be dehydrated through the drying device and then filled into the working air storage device, when the drying device is saturated, the drying capacity of the compressed air can be greatly reduced, at the moment, the drying device is usually required to be subjected to regeneration ventilation, namely, the air compressor 1 is unloaded to stop introducing humid air into the drying device, meanwhile, the dry air in the air storage device is reversely introduced into the drying device to remove moisture in the drying device, so that the drying capacity is obtained again, however, the existing factors for judging whether the drying device needs regeneration ventilation only need the excess air of the drying device, the excess air measurement usually needs to obtain the rotating speed of an engine through a vehicle-mounted control board, then the rotating speed of the engine is converted, and a certain deviation exists between the excess air quantity value measured in the mode and the actual value, so that the actual excess air quantity value cannot be accurately reflected, and the regeneration ventilation of the drying device cannot be accurately controlled.
In view of the above, the present invention provides a dual-parameter electronic air processing system for a commercial vehicle and a dryer regeneration control method, which aim to solve the problem that in the existing commercial vehicle air processing system, only the excess air value passing through the dryer is used as a control signal for regenerating the dryer, so that the regeneration control of the dryer is inaccurate, wherein fig. 1 to 3 are schematic diagrams of structures of an embodiment of the dual-parameter electronic air processing system for a commercial vehicle, fig. 4 is a three-coordinate diagram of the exhaust rate of an air compressor, and fig. 5 is a step flow chart of the dryer regeneration control method.
Referring to fig. 1, the dual-parameter electronic air processing system 100 for a commercial vehicle includes an air compressor 1, a dryer 2, an air storage tank 3, a regeneration control assembly 4, a controller 5, an air pressure sensor 6 and an dew point sensor 7, wherein the air compressor 1 has an air compressor exhaust port; the dryer 2 is provided with a drying cavity 21, and the exhaust port of the air compressor is communicated with the drying cavity 21; the air storage tank 3 is provided with an air storage tank 3 vent; the regeneration control assembly 4 is communicated with the drying cavity 21 and the air port of the air storage tank 3, and the regeneration control assembly 4 can control the ventilation direction X of the drying cavity 21 and the air port of the air storage tank 3; the controller 5 is electrically connected to an engine of a commercial vehicle, so as to obtain the air passing through the air storage tank 3 at least according to the rotation speed of the engine; the air pressure sensor 6 is electrically connected to the controller 5, and the air pressure sensor 6 is used for detecting the air storage pressure value of the air storage tank 3; the dew point sensor 7 is electrically connected to the controller 5, and the dew point sensor 7 is configured to detect a dew point drop value of the air tank 3.
According to the technical scheme provided by the invention, the gas storage pressure value of the gas storage tank 3 can be monitored in real time through the air pressure sensor 6 to judge whether the air storage tank 3 is completely inflated by the air compressor 1, after the inflation is completed, the rotating speed of the engine obtained in real time by the controller 5 is converted into the rotating speed of the air compressor 1, the exhaust speed of the air compressor 1 is obtained by referring to an MAP graph of the air compressor, the air passing through the gas storage tank 3 is obtained after the time integration of the exhaust speed, so that whether the dryer 2 is saturated is primarily judged, after the dryer 2 is primarily judged to be saturated, the actual dew point reduction value of the compressed gas in the gas storage tank 3 is monitored through the dew point sensor 7, when the monitored actual dew point reduction value is lower than the preset dew point reduction value, the dryer 2 is finally judged to be saturated, the regeneration control assembly 4 is used for controlling the air storage tank 3 to reversely ventilate to the drying cavity 21, the filtered oil and water in the dryer 2 are removed from the dryer 2 again, the drying capacity of the dryer 2 is restored, and the problem of the two-level air passing through the air vent and the two-vent ports is avoided, and the problem of the air storage tank 2 can be effectively regenerated is avoided.
It should be noted that, the precondition for regenerating and ventilating the dryer 2 is unloading of the air compressor 1, and the drying chamber 21 is opened to the external atmosphere, so that the air compressor 1 stops pumping the dryer 2 and simultaneously the regenerated and ventilated gas can bring out the moisture in the dryer 2, and the unloading of the air compressor 1 can be controlled in various manners, and the air compressor 1 can be directly controlled to stop working, or the exhaust port of the air compressor 1 can be connected to the external atmosphere, which is not limited in this embodiment; meanwhile, the controller can also obtain an external atmospheric pressure value and an air inlet pressure value of the air compressor through a sensor, which is a conventional arrangement, and the embodiment is not described in detail.
Meanwhile, the regeneration control component 4 controls the ventilation direction X of the air vent of the drying cavity 21 and the air vent of the air storage tank 3 to be various, an on-off electromagnetic valve can be arranged on a connecting pipeline, when the air compressor 1 charges air into the air storage tank 3, the on-off electromagnetic valve is controlled to be conducted, when the air compressor 1 is unloaded, the on-off electromagnetic valve is controlled to be disconnected so as to prevent the air storage tank 3 from reversely ventilating the drying cavity 21, and when the dryer 2 is judged to need to be in regeneration ventilation, the on-off electromagnetic valve is controlled to be conducted so as to allow the air storage tank 3 to reversely regenerate and ventilate the drying cavity 21.
Specifically, referring to fig. 2, in the present embodiment, the regeneration control assembly 4 includes a first communication pipeline 41, a second communication pipeline 42, and an exhaust valve 43, where the first communication pipeline 41 communicates the drying chamber 21 with the air port of the air tank 3, and a one-way conduction valve 411 is disposed on the first communication pipeline 41, and the one-way conduction valve 411 is used to control the first communication pipeline 41 to conduct from the drying chamber 21 to the air port of the air tank 3; the second communication pipeline 42 is connected to the drying chamber 21 and the air port of the air storage tank 3, and a regeneration on-off valve 421 is disposed on the second communication pipeline 42, and the regeneration on-off valve 421 is electrically connected to the controller 5, so as to control on-off of the second communication pipeline 42; the exhaust valve 43 is controllable to communicate the air compressor exhaust port and the drying chamber 21 to the outside atmosphere.
By means of the arrangement of the first communication pipeline 41 and the one-way conduction valve 411, the air compressor 1 can charge air into the air storage tank 3 through the drying cavity 21, but cannot reversely ventilate through the first communication pipeline 41, and then the air storage tank 3 reversely ventilates into the drying cavity 21 by means of the arrangement of the second communication pipeline 42 and the regeneration on-off valve 421, so that the reverse ventilation of the air storage tank 3 is controlled by the controller 5 according to actual conditions, and the controller 5 controls the regeneration on-off valve 421 to conduct only when the dryer 2 meets the condition of reverse regeneration ventilation, so that the air storage tank 3 is allowed to reversely ventilate into the drying cavity 21, and the controllable communication of the exhaust valve 43 between the exhaust port of the air compressor and the drying cavity 21 and the external atmosphere is realized, so that unloading of the air compressor 1 and discharging of the regeneration gas through the drying cavity 21 are realized.
It should be noted that, the exhaust valve 43 may be directly controlled by the electric control of the controller 5, or may be indirectly controlled by a pneumatic transmission manner, so long as the exhaust valve 43 is controllable in function of communicating the exhaust port of the air compressor and the drying cavity 21 to the external atmosphere, which is not described in detail in this embodiment.
Further, referring to fig. 3, in the present embodiment, the drying chamber 21 is elongated, two side walls of the drying chamber 21 in the length direction are respectively formed with two drying air vents 22, one of the drying air vents 22 is connected to the air compressor exhaust port, the other drying air vent 22 is connected to the first communication pipeline, two side walls of the drying chamber 21 in the width direction are respectively formed with a regeneration air vent 23 in a penetrating manner, one of the regeneration air vents 23 is connected to the second communication pipeline 42, and the other regeneration air vent 23 is connected to the exhaust valve 43.
Through two dry vent openings 22, make the moist gas that is discharged by the air compressor machine gas vent can be conducted and fully dried from the length direction of dry chamber 21, and to the regeneration ventilation stage of desiccator 2, the dry gas that is discharged by gas holder 3 regard as the width direction of dry chamber 21 regeneration direction Y to the dry intracavity lets in, takes away moisture back to dry chamber outside is discharged, utilizes the dry gas of same volume, can take away more fast the moisture in the dry chamber 21 has improved regeneration efficiency. It will be appreciated that the desiccant chamber 21 is filled with a desiccant assembly 24 for absorbing moisture from the compressed gas. Meanwhile, it should be noted that the two drying vents 22 and the two regeneration air passing vents 23 are alternately conducted to avoid that air is discharged from the wrong pipeline to the outside of the drying cavity 21, and the specific implementation manner thereof can be controlled by an electromagnetic valve, which is not described in detail in this embodiment.
In the conventional dryer 2, the 3A molecular sieve is used to dry the wet gas, but only the 3A molecular sieve has a single component, has a large stacking specific gravity and is easy to pulverize after long-term use, and lacks pre-drying, when the compressed air with a high water content is treated, the 3A molecular sieve has a poor adsorption rate, so that the treated compressed air still has more water, therefore, referring to fig. 3, in this embodiment, the drying chamber 21 is provided with a drying agent assembly 24, and in the ventilation direction X of the two drying ventilation openings 22, the drying agent assembly 24 sequentially includes an activated alumina drying agent 241, a 4A molecular sieve drying agent 242 and a 3A molecular sieve drying agent 243; each regeneration gas passing port 23 includes three regeneration gas passing ports 231 corresponding to the activated alumina drying agent 241, the 4A molecular sieve drying agent 242, and the 3A molecular sieve drying agent 243, wherein the three regeneration gas passing ports 231 of one regeneration gas passing port 23 are commonly connected to the exhaust valve 43, and the three regeneration gas passing ports 231 of the other regeneration gas passing port 23 are commonly connected to the second communication pipeline 42.
Since the capacities of the 3A molecular sieve drying agent 243, the 4A molecular sieve drying agent 242 and the activated alumina drying agent 241 for adsorbing moisture are gradually improved, a certain proportion of the activated alumina drying agent 241, the 4A molecular sieve drying agent 242 and the 3A molecular sieve drying agent 243 are sequentially arranged in the ventilation direction X of the two drying vents 22, and the activated alumina drying agent 241 is used for pre-drying, so that the utilization efficiency of each drying agent can be effectively improved, the drying agents can absorb a certain proportion of moisture, and the use of a certain amount of regenerated drying gas can be reduced; furthermore, since the regeneration gas passing openings 23 have a certain area, the humid gas may escape in the ventilation direction X within the regeneration gas passing openings 23, thereby escaping to some extent to be dried by the desiccant assembly 24, and by dividing each regeneration gas passing opening 23 into three regeneration gas dividing openings 231 to correspond to the above three different types of desiccants, escape of the humid gas within the regeneration gas passing opening 23 is blocked.
It should be noted that, each regeneration gas port 231 corresponds to an on-off control valve, so that the moist gas is prevented from entering the second communication pipeline 42 from the regeneration gas port 231 located at the front end of the ventilation direction X and is discharged back to the drying chamber 21 from the regeneration gas port 231 located at the rear end of the ventilation direction X in the drying stage of the dryer 2, thereby avoiding insufficient drying of the moist gas; specifically, each regeneration gas separation port 231 is provided at the front end of the corresponding desiccant in the ventilation direction X.
Specifically, in this embodiment, the second ventilation pipeline includes ventilation manifold and three ventilation branch pipes, and is three ventilation branch pipes communicate jointly to ventilation manifold, and correspond respectively and communicate to corresponding regeneration gas branch mouth 231, ventilation manifold is close to the active alumina drier 241 corresponds regeneration gas branch mouth 231 sets up, so sets up, can make more dry gas lets in more the water absorption the active alumina drier 241 to make regeneration process more reasonable, the drying of every different drier is more even, has further improved regeneration efficiency.
In various control modes of the exhaust valve 43, specifically, in this embodiment, the dual-parameter electronic air processing system 100 for a commercial vehicle further includes a cut-off electromagnetic valve 8, where the cut-off electromagnetic valve 8 is electrically connected to the controller 5, and the cut-off electromagnetic valve 8 has two cut-off air ports, one of the cut-off air ports is connected to the air port of the air tank 3, and the other cut-off air port is pneumatically connected to the valve core of the exhaust valve 43 and the pneumatic control portion of the air compressor 1, respectively. The arrangement is that the controller 5 conducts the electric control of the cut-off electromagnetic valve 8, so that the exhaust valve 43 and the pneumatic control part of the air compressor 1 are controlled to conduct pneumatically by the air in the air storage tank 3, thereby realizing indirect control of the exhaust valve 43 and the pneumatic control part of the air compressor 1, reducing the use of the electromagnetic valve, saving the cost, and improving the linkage controllability of the exhaust valve 43 and the pneumatic control part of the air compressor 1, and the control efficiency is high.
The pneumatic control unit of the air compressor 1 may be a control switch of the air compressor 1, or may be a power reduction control device of the air compressor 1, and by controlling ventilation of the pneumatic control unit, the air compressor 1 may be stopped or power reduced, thereby reducing redundant energy consumption.
In addition, referring to fig. 5, the dryer regeneration control method provided by the present invention is based on the commercial vehicle dual-parameter electronic air processing system 100, and includes the following steps:
s100, acquiring a gas storage pressure value of the gas storage tank 3;
s200, when the gas storage pressure value is larger than a preset pressure value, the exhaust valve 43 is controlled to be conducted so that the exhaust port of the air compressor and the drying cavity 21 are communicated to the outside atmosphere;
s300, acquiring the drying air passing amount of the dryer 2;
s400, when the drying air passing amount is larger than a preset air passing amount, acquiring an actual dew point drop value of the air storage tank 3;
s500, when the actual dew point drop value is smaller than a preset dew point drop value, controlling the regeneration on-off valve 421 to be conducted so as to reversely ventilate the air storage tank 3 to the drying cavity 21;
s600, acquiring the regenerated excess of the gas passing through the dryer 2;
s800, when the regeneration excess is larger than the final preset volume, controlling the regeneration on-off valve 421 to be disconnected;
by incorporating the dew point drop value into the on-off control of the regeneration on-off valve 421 as a feedback signal of the regeneration control, the double-parameter control is formed with the drying excess air quantity, so that the actual saturation condition of the dryer 2 is reflected more accurately, and the on-off control of the system on the regeneration on-off valve 421 is more accurate.
Because the humidity of the environment may affect the intake pressure of the air compressor 1 to change relative to the atmospheric pressure by a certain amount, in this embodiment, before the step S800 of controlling the opening of the regeneration on-off valve 421, the dryer regeneration control method further includes S700, determining a final preset volume, and the step S700 of determining the final preset volume includes:
s710, setting an initial preset volume;
s720, acquiring an air inlet pressure value of the air compressor 1 and an atmospheric pressure value of the environment;
s730, determining the final preset volume according to the initial preset volume, the intake pressure value and the atmospheric pressure value;
the air inlet pressure value and the atmospheric pressure value are introduced to judge the humidity of the environment, so that different final preset volumes are dynamically set according to different humidity conditions, the regeneration excess air quantity required by the dryer 2 is more accurately reflected, and the dryer 2 is ensured to be completely regenerated and dried.
Further, in this embodiment, the step S730 of determining the final preset volume according to the initial preset volume, the intake pressure value and the atmospheric pressure value includes:
s731, calculating an actual pressure difference value of the intake pressure value and the atmospheric pressure value;
s732a, selecting the initial preset volume as the final preset volume when the actual pressure difference is smaller than a preset pressure difference;
s732b, when the actual pressure difference is greater than a preset pressure difference, determining a calculation formula of the final preset volume as follows: r is R s =(2K-P 1 )*R 0 K, wherein R is S For a final preset volume, R 0 For an initial preset volume, P 1 The intake pressure value is K, and the atmospheric pressure value is K;
the preset pressure difference value is introduced to judge the humidity degree of the environment, when the current environment humidity is low, the influence of the environment humidity on the dryer 2 is small, the final preset volume is not required to be adjusted, and the initial preset volume is directly valued; when it is determined that the ambient humidity is high, this means that the influence of the ambient humidity on the dryer 2 is large, the intake pressure value and the atmospheric pressure value are entered into the adjustment of the final preset volume through the above formula, so as to obtain a more reasonable final preset volume according to the humidity level of the environment, and ensure that the dryer 2 is completely regenerated and dried.
Because the existing calculation mode for the dry air volume only obtains the rotational speed of the engine through speed ratio conversion, obtains the rotational speed of the air compressor 1 by comparing with the MAP of the air compressor, and finally obtains the dry air volume by time integration of the exhaust speed, however, the dry air volume obtained by this mode has a deviation from the actual air volume of the dryer 2, when the compressed air temperature is higher or the atmospheric pressure is higher, the actual pump air volume of the air compressor 1 is far greater than the calculated dry air volume, which is easy to cause untimely regeneration of the dryer 2 and influence the drying effect, and based on this, referring to fig. 4, the step S300 of obtaining the dry air volume of the dryer 2 includes:
s310, calculating an initial rotating speed of the air compressor 1 according to the rotating speed of an engine of the commercial vehicle, and determining an initial exhaust rate of the air compressor 1 according to the initial rotating speed;
s320, acquiring an atmospheric pressure value, an atmospheric temperature value and an exhaust back pressure value of the air compressor 1 of the environment, and selecting an air heat capacity ratio corresponding to the atmospheric pressure value according to a preset mapping relation;
s330, calculating a corrected exhaust rate of the air compressor 1 according to the initial exhaust rate, the atmospheric pressure value, the atmospheric temperature value, the exhaust back pressure value and the air heat capacity ratio;
s340, calculating the drying air passing amount of the air compressor 1 according to the corrected exhaust rate and the drying ventilation duration;
the initial exhaust rate is corrected through the atmospheric pressure value, the atmospheric temperature value, the exhaust back pressure value and the air heat capacity ratio to obtain a corrected exhaust rate, so that the actual exhaust rate of the air compressor 1 is better reflected, and further, the more representative dry air capacity is obtained through time integration;
meanwhile, as shown in fig. 4, interpolation is performed on exhaust back pressure and the rotation speed coordinates of the air compressor, so that the working area of the air compressor is divided into 9 areas. The V area is a main working area, the atmospheric temperature and the atmospheric pressure CAN be introduced to correct the exhaust rate again, the atmospheric temperature and the atmospheric pressure CAN be obtained through a CAN bus of the controller, the working time of other 8 areas is shorter, and the initial exhaust rate is still selected by adopting the corrected exhaust rate of the air compressor according to the MAP diagram of the air compressor.
Specifically, in this embodiment, the calculation formula for determining the corrected exhaust rate of the air compressor is as follows: q (Q) c =Q 0 *(T/293C p ) K (p+1)/(p+k); wherein Q is c Correcting the exhaust rate for the air compressor 1, Q 0 Initial exhaust rate C of air compressor 1 obtained by comparing MAP of air compressor 1 P The air heat capacity ratio at the atmospheric temperature T is the atmospheric pressure value, T is the atmospheric temperature value, and p is the exhaust back pressure.
In other embodiments, the method for obtaining the drying air passing through the dryer 2 may further include providing a flow meter in the dryer 2, and measuring the drying air passing through the drying chamber 21 by the flow meter.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the specification and drawings of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (6)
1. A dual-parameter electronic air handling system for a commercial vehicle, comprising:
the air compressor is provided with an air compressor exhaust port;
the dryer is provided with a drying cavity, and the air compressor exhaust port is communicated with the drying cavity;
the air storage tank is provided with an air storage tank vent;
the regeneration control assembly is communicated with the drying cavity and the air storage tank air vent, and can control the ventilation direction of the drying cavity and the air storage tank air vent;
the controller is electrically connected to an engine of the commercial vehicle so as to at least acquire the air passing through the air storage tank according to the rotating speed of the engine;
the air pressure sensor is electrically connected to the controller and is used for detecting the air storage pressure value of the air storage tank; the method comprises the steps of,
the dew point sensor is electrically connected to the controller and is used for detecting the dew point drop value of the air storage tank;
the regeneration control assembly includes:
the first communication pipeline is communicated with the drying cavity and the air storage tank air vent, and a one-way conduction valve is arranged on the first communication pipeline and used for controlling the first communication pipeline to conduct from the drying cavity to the air storage tank air vent;
the second communication pipeline is communicated with the drying cavity and the air storage tank vent, and a regeneration on-off valve is arranged on the second communication pipeline and is electrically connected to the controller and used for controlling the on-off of the second communication pipeline; the method comprises the steps of,
the exhaust valve can be used for controlling the exhaust port of the air compressor and the drying cavity to be communicated with the outside atmosphere;
the drying cavity is arranged in a long extending mode, two side walls of the drying cavity in the length direction are respectively communicated with two drying air vents, one drying air vent is communicated with the air compressor exhaust port, the other drying air vent is communicated with the first communication pipeline, two side walls of the drying cavity in the width direction are respectively communicated with a regeneration air vent, one regeneration air vent is communicated with the second communication pipeline, and the other regeneration air vent is communicated with the exhaust valve;
the drying cavity is provided with a drying agent component, and the drying agent component sequentially comprises an activated alumina drying agent, a 4A molecular sieve drying agent and a 3A molecular sieve drying agent in the ventilation direction of the two drying air vents;
each regeneration gas passing port comprises three regeneration gas passing ports corresponding to the activated alumina drying agent, the 4A molecular sieve drying agent and the 3A molecular sieve drying agent, wherein the three regeneration gas passing ports of one regeneration gas passing port are communicated with the exhaust valve together, and the three regeneration gas passing ports of the other regeneration gas passing port are communicated with the second communication pipeline together;
each regenerated gas separating opening corresponds to one on-off control valve.
2. The dual-parameter electronic air handling system of a commercial vehicle of claim 1, further comprising a shut-off solenoid valve electrically connected to the controller and having two shut-off vents, one of the shut-off vents being in communication with the air reservoir vent and the other of the shut-off vents being pneumatically coupled to a valve core of the air outlet valve and a pneumatic control of the air compressor, respectively.
3. A dryer regeneration control method based on the commercial vehicle dual parameter electronic air treatment system of any one of claims 1 to 2, characterized in that the dryer regeneration control method comprises the steps of:
acquiring a gas storage pressure value of the gas storage tank;
when the gas storage pressure value is larger than a preset pressure value, the exhaust valve is controlled to be conducted so that the exhaust port of the air compressor and the drying cavity are communicated to the outside atmosphere;
acquiring the drying air passing amount of the dryer;
when the drying air passing amount is larger than the preset air passing amount, acquiring an actual dew point reduction value of the air storage tank;
when the actual dew point drop value is smaller than a preset dew point drop value, the regeneration on-off valve is controlled to be conducted so that the air storage tank reversely ventilates to the drying cavity;
acquiring a regeneration excess of gas passing through the dryer;
and when the regeneration excess is larger than the final preset volume, controlling the regeneration on-off valve to be disconnected.
4. The dryer regeneration control method of claim 3, further comprising determining a final preset volume, the step of determining the final preset volume comprising:
setting an initial preset volume;
acquiring an air inlet pressure value of the air compressor and an atmospheric pressure value of the environment;
and determining the final preset volume according to the initial preset volume, the air inlet pressure value and the atmospheric pressure value.
5. The dryer regeneration control method according to claim 4, wherein the step of determining the final preset volume based on the initial preset volume, the intake pressure value, and the atmospheric pressure value includes:
calculating an actual pressure difference of the intake pressure value and the atmospheric pressure value;
when the actual pressure difference is smaller than a preset pressure difference, selecting the initial preset volume as the final preset volume;
when the actual pressure difference is greater than a preset pressure difference, the calculation formula of the final preset volume determination is as follows: r is R s =(2K-P 1 )*R 0 K, wherein R is S For a final preset volume, R 0 For an initial preset volume, P 1 The intake pressure value is K, and the atmospheric pressure value is K.
6. The dryer regeneration control method according to claim 3, wherein the step of obtaining the drying excess of the dryer includes:
calculating the initial rotating speed of the air compressor according to the rotating speed of an engine of the commercial vehicle, and determining the initial exhaust rate of the air compressor according to the initial rotating speed;
acquiring an atmospheric pressure value, an atmospheric temperature value and an exhaust back pressure value of an air compressor of the environment, and selecting an air heat capacity ratio corresponding to the atmospheric pressure value according to a preset mapping relation;
calculating a corrected exhaust rate of the air compressor according to the initial exhaust rate, the atmospheric pressure value, the atmospheric temperature value, the exhaust back pressure value and the air heat capacity ratio;
and calculating the drying air passing amount of the air compressor according to the corrected exhaust rate and the drying ventilation duration.
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