CN113153489A - Automatic crankcase heating ventilation unit of control - Google Patents
Automatic crankcase heating ventilation unit of control Download PDFInfo
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- CN113153489A CN113153489A CN202110295235.8A CN202110295235A CN113153489A CN 113153489 A CN113153489 A CN 113153489A CN 202110295235 A CN202110295235 A CN 202110295235A CN 113153489 A CN113153489 A CN 113153489A
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- temperature
- heating
- temperature control
- ventilation
- ventilation pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
- H05B1/0205—Switches using a fusible material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
Abstract
The invention discloses an automatically controlled crankcase heating and ventilating device, which comprises a ventilating pipe, a temperature control device, a power line and a plug, wherein the ventilating pipe is connected with the temperature control device; the ventilation pipe is formed by sequentially connecting an air inlet end, a main body and an air outlet end, the outer surface of the main body is provided with a heating material, and the heating material, the temperature control device, the power line and the plug form a loop; the surface of the ventilation pipe can also be wrapped with a foaming pipe for heat preservation, and wrapped with a heat-shrinkable sheath for abrasion prevention and flame retardance. The temperature control device is of a two-point temperature control type, and is closed at a lower temperature point and opened at an upper temperature point. After the heating ventilation device is communicated with the power supply, the temperature control device can automatically control the connection and disconnection of the heating material, control the temperature of the ventilation pipe within a certain range, and solve the problem that the crankcase ventilation pipe is frozen by condensed water.
Description
Technical Field
The invention relates to an engine structure, in particular to an automatically controlled crankcase heating and ventilating device.
Background
Crankcase ventilation systems are one of the important components of engines, whose main function is to reasonably control crankcase pressure; separating oil and gas in the axle box discharge, and returning the separated engine oil to an oil sump; and secondly, guiding mixed gas consisting of unburned fuel gas, water vapor, waste gas and the like in the crankcase to an air inlet pipe through a connecting pipe, returning the mixed gas to the cylinder for re-combustion, or discharging the mixed gas to the atmosphere.
Because the mixed gas of the crankcase contains a large amount of moisture, in a cold environment in winter, when the high-temperature mixed gas of the crankcase flows through the ventilation pipe in a low-temperature state, water vapor in the mixed gas is condensed into water drops and further freezes to form ice blocks, so that the ventilation pipe is blocked, the pressure of the crankcase is increased, engine oil leaks from a sealing part, the serious engine oil can enter the cylinder to burn, and finally the engine is scrapped.
At present, aiming at the problem of water vapor condensation and even icing of the crankcase ventilation pipe, common solutions mainly comprise the following solutions: firstly, a heating water pipe or a high-temperature air pipe is arranged beside a crankcase ventilation pipe, and engine cooling liquid or exhausted high-temperature gas is used for indirectly heating the crankcase ventilation pipe; secondly, a heating transition joint is arranged at the connecting position of the crankcase ventilation pipe and the air inlet pipe; and thirdly, arranging a heating material on the ventilation pipe, and starting the heating material by utilizing an engine circuit or a whole vehicle circuit to heat.
The scheme of heating the water pipe or the air pipe is limited by the space of the whole vehicle, and part of the vehicles cannot be provided with additional water pipes or air pipes; the heating water pipe shunts the engine coolant to influence the heat dissipation of the engine; in addition, when the engine coolant or the exhaust high-temperature gas is cold started at low temperature, a certain temperature rise process exists, and the problem of condensed water and icing of a crankcase ventilation pipe exists in the period of time.
The heating transition joint scheme can only solve the problem of freezing of condensed water of mixed gas after flowing through a ventilation pipe of a crankcase, cannot solve the problem of freezing of condensed water in the process of flowing through the ventilation pipe, and still has the risk of damaging the engine; or the mixed gas directly discharges into the atmosphere after flowing through the crankcase ventilation pipe, and the heating transition joint cannot be arranged.
The heating material is arranged on the ventilation pipe, so that the problem that water vapor in mixed gas of the ventilation pipe is condensed into water drops, and the ventilation pipe is frozen to cause blockage can be solved; however, the problems that the structure and control of the heating material are complicated exist, the heating material is arranged on the inner wall of the ventilation pipe 201911028088.3, the middle of the ventilation pipe is required to be cut, and then the opened ventilation pipe is connected through an intermediate joint, so that the leakage risk is increased; the heating material is always in a heated state, causing a loss of electrical power and increasing the risk of failure. Patent 201820384368.6 wraps the electrothermal material of the electrothermal wire on the surface of the vent pipe, but the heating control of the electrothermal material is controlled by an ECU, and the ECU control circuit is required to be added and the programming of the ECU is required to be modified.
According to GB/T22687-. The temperature controller comprises a temperature controller and a temperature limiter. The temp. controller is a periodical temp. sensitive controller, the temp. can be set by user in a defined range, and under the condition of normal working the temp. can be kept between two set values of on-off, when the temp. is raised to the upper set temp. or lowered to the lower set temp., the contact can automatically open or close circuit, so that the temp. of the appliance can be kept in a certain range. The temperature controller is divided into a snap type (instantaneous type) and a slow type according to the action speed, and is divided into an adjustable type and a fixed type according to the temperature setting mode. Dividing the temperature rise contact into a normally closed type and a normally open type according to the contact form, wherein the normally closed type is that the temperature rise contact is disconnected and the temperature fall contact is connected; in the normally open type, the contact is closed when the temperature rises, and the contact is opened when the temperature falls. The temperature controller is mainly applied to occasions where a circuit needs to be automatically switched on and off along with temperature change, so that the temperature of appliances is controlled within a constant temperature range, such as a water dispenser of household appliances, a water heater, an electric heating water boiling bottle and the like; hot melting machines such as office equipment and laser printers; there are also overheat protection and heater applications in automobiles.
According to local standard DB 44/T1391-. Under normal working conditions, the device is switched on or off at a preset action temperature and mainly comprises a temperature-sensitive soft magnet and a permanent magnet. The control is performed by controlling the switching-on temperature and the switching-off temperature to the mutual switching of the off and on states of the magnetosensitive temperature-controlled switch contacts. The temperature sensitive controller is divided into a normally closed type and a normally open type according to a contact point connection mode.
Disclosure of Invention
Aiming at the defects of the axle box ventilation heating device in the prior art, the invention aims to provide the automatically-controlled crankcase heating and ventilation device, heating materials are wound on the outer surface of a crankcase ventilation pipe to be heated, the heating device is adjusted to be controlled through the temperature control device, a heat flow pipeline is not required to be additionally arranged, the heating material is simple to control and set, mixed gas can be heated, and the problems that the mixed gas flows through the crankcase ventilation pipe and condensed water flowing through the crankcase ventilation pipe is frozen can be simply and efficiently solved.
The invention is realized by the following technical scheme:
an automatically controlled crankcase heating ventilation device comprises a ventilation pipe, a temperature control device, a power line and a plug; the ventilation pipe is formed by sequentially connecting an air inlet end, a main body and an air outlet end, a heating material is arranged on the outer surface of the ventilation pipe and is connected with the temperature control device, and the temperature control device is connected with a power line and a plug to form a loop.
Further, the temperature control device comprises a temperature control switch, the heating material is communicated when the temperature is lower than a set temperature point according to a set temperature value, and the contact of the temperature control switch is connected; when the temperature is higher than the set temperature point, the heating material is disconnected, and the temperature control switch contact is disconnected; or according to a set temperature value, when the temperature is lower than a set temperature point, the heating material is communicated, and the temperature control switch contact is disconnected; when the temperature is higher than the set temperature point, the heating material is switched off, and the temperature control switch is switched on.
Further, the temperature control switch is a bimetal temperature control switch or a magnetic-sensitive temperature control switch.
Further, the temperature control device is a normally closed or normally open temperature control switch.
Further, the temperature control device is of a two-point temperature control type, and is connected to the heating material at a lower temperature point and disconnected from the heating material at an upper temperature point.
Furthermore, the temperature control range of the temperature control device is 0-150 ℃.
Furthermore, the ventilation pipe is a metal pipe, a rubber pipe, a plastic pipe or a composite pipe.
Furthermore, the heating material is a resistance wire or a heating belt.
Further, the heating material is wrapped by an insulating material for insulation and heat insulation.
Furthermore, the heating material is assembled on the main body in a mode of winding on the main body or in a mode of parallelly attaching the heating material to the main body in parallel.
Furthermore, the heating power range of the ventilation pipe is 1-50000 watts per square meter.
Furthermore, the air inlet end is a flexible connection joint, and the flexible connection joint is a rubber pipe joint, a rubber sleeve joint or a corrugated pipe joint.
Further, the outer wall of main part be provided with the swell anticreep structure for prevent that flexible coupling joint from deviating from.
Furthermore, the air inlet end is a hard connection joint, and the hard connection joint can be a metal joint, a plastic joint or a quick connection joint.
Furthermore, the end of giving vent to anger be provided with horn mouth sleeve structure for it freezes to improve the end of giving vent to anger.
Furthermore, the ventilation pipe is wrapped by a foaming pipe and used for heat preservation.
Furthermore, the ventilation pipe is wrapped by a heat shrinkage sheath and used for preventing abrasion and resisting flame.
Furthermore, the power line is externally wrapped by a corrugated pipe for insulation and abrasion prevention.
Furthermore, the plug can be connected with an engine circuit and also can be connected with a whole vehicle circuit.
Compared with the prior art, the invention has the following advantages:
the automatically controlled crankcase heating and ventilating device adopts the arrangement structure of the original engine crankcase ventilating pipe without additionally designing a pipeline structure, the air inlet end is connected with an oil-gas separator or a cylinder cover (or an air outlet of a machine body), and the air outlet end is connected with an air inlet pipe or an oil pan or is directly communicated with the atmosphere. Through set up temperature control device in crankcase ventilation rubber tube, automatic control heating material heats and stop heating, improves the inner wall temperature of crankcase ventilation pipe, reduces the temperature difference of the high temperature gas mixture that comes out from the engine and the ventilation pipe inner wall, solves the gas mixture and freezes the problem at the water of congealing of ventilation pipe inner chamber under the cold environment of low temperature, need not additionally to take up space simultaneously and arranges the pipeline introduction heat flow. The automatic control crankcase heating ventilation device can be improved on the basis of the original ventilation pipe structure, only a heating power circuit is needed, the temperature control device can automatically control the heating circuit to be opened and closed, and the automatic control crankcase heating ventilation device is simple in structure, high in universality, safe and reliable.
Drawings
Fig. 1 is an overall view of a crankcase heating ventilation apparatus according to embodiment 1 of the invention;
fig. 2 is a sectional view of a ventilation pipe of the crankcase heating ventilation device according to embodiment 1 of the invention;
fig. 3 is a schematic circuit diagram of a crankcase heating ventilation device according to embodiment 1 of the invention;
fig. 4 is a sectional view of a plastic joint (one of hard joint joints) at the outlet end of the crankcase heating ventilation device according to embodiment 1 of the invention;
fig. 5 is a sectional view of a bellmouth rubber boot at an outlet end 170 of a crankcase heating and ventilating device according to embodiment 1 of the invention;
FIG. 6 is a sectional view of piping 200 according to embodiment 1 of the present invention;
fig. 7 is an overall view of a crankcase heating ventilation device according to embodiment 2 of the invention;
fig. 8 is a sectional view of an intake-end rubber tube (one of the flexible joint joints) of the crankcase heating ventilation device according to embodiment 2 of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Example 1
As shown in fig. 1, a crankcase heating and ventilation device 100 includes a ventilation tube 110, a temperature control device 120, a power cord 130, and a plug 140.
As shown in FIG. 2, the vent tube 110 is comprised of an inlet end 150, a body 160, and an outlet end 170. The inner layer of the main body 160 is a pipe 200, and the pipe 200 is a nylon pipe. As shown in fig. 6, the piping 200 is wrapped with a foam tube 220 to perform a heat-insulating function. The pipeline 200 is wrapped by the heat shrinkage sheath 210, so that the function of preventing abrasion can be achieved; the flame-retardant heat-shrinkable sheath 210 can play a flame-retardant role. As shown in fig. 4, the air inlet 150 is a plastic joint (hard connection joint), and the plastic joint is fixed to the pipeline 200 by interference fit with the pipeline 200 through a bamboo joint on the plastic joint. As shown in fig. 5, the air outlet end 170 is directly connected to the atmosphere, and a bell-mouth rubber sleeve is disposed on the air outlet end 170. The bell-mouth rubber sleeve can enlarge the flow area and effectively reduce the risk that the condensed water freezes to block the inner cavity of the ventilation pipe.
As shown in fig. 3, the surface of the pipeline 200 is provided with a heating material 180, and the heating material 180 is connected with the temperature control device 120, the power line 130 and the plug 140; the power cord 130 is provided with two wires and the connector 140 is provided with two channels. The heating material 180 is a resistance wire wrapped with an insulating layer for insulation and heat insulation. One end of the heating material 180 is connected with one lead of the power line 130, the other end of the heating material 180 is connected with one end of the temperature control device 120, the other end of the temperature control device 120 is connected with the other lead of the power line 130, and the power line 130 is connected with the plug 140. The connector 140 may be electrically connected to the engine or the vehicle. The power cord 130 is externally wrapped with a bellows 190 for insulation and wear protection.
The temperature control device 120 controls the temperature range to be 0-150 ℃, and suitably 5-80 ℃, and a normally closed sudden-jump type temperature controller (KSD-5/80) is selected. The temperature controller (KSD-5/80) controls the temperature range to be 5-80 ℃, the temperature controller is communicated at 5 ℃ and below 5 ℃, the heating material 180 is communicated with the power line 130, and the heating material 180 is heated at the moment; the thermostat is turned off at 80 degrees and above 80 degrees, and the heating material 180 and the power cord 130 are cut off, at which time the heating material 180 is not heated. When the temperature rises from 5 ℃ or below 5 ℃ to a range of 5 ℃ to 80 ℃, the temperature controller is in a connection state, the heating material 180 is communicated with the power line 130, and the heating material 180 is heated; when the temperature is reduced from 80 degrees or 80 degrees to a range of less than 80 degrees and more than 5 degrees, the temperature controller is in an off state, the heating material 180 and the power line 130 are cut off, and the heating material 180 stops heating.
The power of the resistance wire heating material 180 is 1-100 ohm/m, suitably 10-80 ohm/m, at this time 10 ohm/m is selected and wound around the main body 160. The resistance of the resistance wire is basically unchanged during working, the current is constant under stable voltage, and the power of the resistance wire can be regarded as a standard quantity. By calibrating the crankcase heating and ventilation device 100, the inner cavity of the ventilation pipe 110 changes between certain two temperatures (within a certain temperature range), and the heating and ventilation device 100 can prevent the mixed gas from generating condensed water and icing; if during the engine start-up phase, the heating and ventilation device 100 is able to generate heat, melting ice that has frozen, and preventing the crankcase pressure from rising.
There is a range of resistance values for the resistive wire heating material that is wound around the subject 160 tube 200 of the vent 110, and different vent heating powers (watts per square meter) will be present for different winding lead angles and different densities. Finally, the resistance of the resistance wire heating material does not determine the heating efficiency, and the vent heating power (watts per square meter) determines the heating efficiency.
After winding on the pipeline, according to the calculation of resistance wire, the diameter of resistance wire is generally 1.2mm usually, and the tiling is on 1 square meter, has 50 kw/square meter. The heating power of the ventilation pipe is therefore between 1 and 50000W/m, preferably between 1 and 30000W/m.
The crankcase heating ventilation device 100 of the present invention operates as follows:
the temperature control device 120 is a temperature controller (KSD-5/80), the temperature controller is connected at 5 ℃ and below 5 ℃, the heating material 180 is communicated with the power line 130, and the heating material 180 is heated at the moment; the thermostat is turned off at 80 degrees and above 80 degrees, and the heating material 180 and the power cord 130 are cut off, at which time the heating material 180 is not heated. When the temperature rises from 5 ℃ or below 5 ℃ to above 5 ℃ and is below 80 ℃, the temperature controller is in a connection state at the moment, the heating material 180 is communicated with the power line 130, and the heating material 180 is heated at the moment; when the temperature is reduced from 80 degrees or 80 degrees to below 80 degrees and at the same time is above 5 degrees, the temperature controller is in an off state, the heating material 180 and the power line 130 are cut off, and the heating material 180 stops heating.
When in use, the air inlet end 150 of the ventilation pipe 110 is connected with an air outlet end (not shown) of the oil-gas separator, the air outlet end 170 of the ventilation pipe 110 is connected with an air inlet end (not shown) of the crankcase, which is positioned on the oil pan, and the plug 140 of the engine heating and ventilation device 100 is connected with an engine wiring harness plug (not shown). In a cold and low-temperature environment, when the vehicle stops working and the engine is turned off, mixed gas still exists in the ventilation pipe 110, and the mixed gas is easy to generate condensed water at the gas outlet end 170 to freeze; when the engine is started, ice blocks are frozen at the air outlet end 170, when the temperature control device 120 detects that the temperature of the position in contact with the ventilation pipe 110 is lower than 5 ℃, the temperature control device 120 is opened, the resistance wire (heating material 180) is powered through the plug 140, the power wire 130 and the temperature control device 120, the resistance wire heating material 180 starts to heat, heat conduction is carried out through the pipe wall of the main body 160, and then the temperature of the inner wall of the ventilation pipe 110 is increased. Meanwhile, the mixed gas from the gas inlet 150 has a high temperature, so that the inner wall of the ventilation pipe 110 can be heated, and ice blocks contacting with the mixed gas can be melted. When the temperature of the inner wall of the main body 160 is increased to be higher than 0 ℃, ice blocks in contact with the inner wall of the ventilation pipe 110 at the air outlet end 170 begin to melt into water, the melted water flows under the action of the pressure and gravity of mixed gas, meanwhile, the resistance wire heating material 180 on the ventilation pipe 110 continuously heats, more ice blocks are melted into water, the frozen ice blocks can be melted under the action of heat generated by the mixed gas with higher temperature (when the ice blocks are partially melted, the mixed gas can partially circulate in the inner cavity of the ventilation pipe) and the heating material, and the mixed gas can normally circulate in the inner cavity of the ventilation pipe 110.
When the vehicle runs in a cold low-temperature environment, when the temperature control device detects that the temperature of the position in contact with the ventilation pipe is 5 ℃ or lower than 5 ℃, the temperature control device 120 is opened, the resistance wire is powered by the plug 140, the power wire 130 and the temperature control device 120, the resistance wire is heated, the inner wall of the ventilation pipe 110 is heated through the pipe wall of the main body 160, and the temperature of the inner wall of the ventilation pipe 110 is increased. At this moment, the temperature of the inner wall of the ventilation pipe 110 is high, and when high-temperature mixed gas flows through the inner cavity of the ventilation pipe 110, the temperature difference between the high-temperature mixed gas and the inner wall of the ventilation pipe 110 is small, so that the phenomenon that water vapor condensed in the mixed gas freezes or more water vapor condensed is avoided.
With the continuous heating of the heating material, the temperature of the contact position of the temperature controller (temperature control device 120) and the ventilation pipe 110 is increased to 5 to 80 ℃, the temperature controller is in a connection state (the temperature control device 120 is connected), the resistance wire heating material 180 is powered through the plug 140, the power wire 130 and the temperature control device 120, and the resistance wire is continuously heated.
As the resistive wire heating material 180 continues to heat, heat is generated, which accumulates to continuously increase the temperature of the temperature control device 120 at the location of contact with the vent tube 110. When the temperature of the contact position between the temperature control device and the ventilation pipe is 80 ℃ or higher than 80 ℃, the temperature control device 120 detects that the temperature of the contact position with the ventilation pipe is higher than 80 ℃, the temperature controller is disconnected or in a disconnected state (the temperature control device is switched off), the temperature control device 120 enables the resistance wire heating material 180 to be powered off, and the resistance wire stops heating.
Since the vehicle is in a cold low-temperature environment, the cold air contacts the outer surface of the ventilation pipe 110, passes through the heat-shrinkable sheath 210, the foam pipe 220 and the pipe wall of the main body 160, and further cools the inner wall of the ventilation pipe 110, so that the temperature of the inner wall of the ventilation pipe 110 is reduced; when the temperature of the contact position of the temperature control device 120 and the ventilation pipe 110 is 5 degrees or more, the temperature controller is in a disconnected state. When the temperature of the contact position of the temperature control device 120 and the ventilation pipe 110 is 5 ℃ or lower than 5 ℃, the temperature control device detects that the temperature of the contact position with the ventilation pipe is 5 ℃ or lower than 5 ℃, the temperature controller (the temperature control device 120) is switched on, the plug 140, the power line 130 and the temperature control device 120 are communicated to supply power, the resistance wire starts to heat, and the heating process of the ventilation pipe is repeated.
The temperature control device 120 monitors the temperature of the position in contact with the ventilation pipe 110, the temperature control device is repeatedly switched on and off between 5 ℃ and 80 ℃, the resistance wire heating material 180 is controlled to heat and stop heating, the temperature of the inner wall of the ventilation pipe 110 is maintained in a proper range, the temperature difference between high-temperature mixed gas and the inner wall of the ventilation pipe is reduced, and the phenomenon that water vapor in the mixed gas is frozen or more water vapor is condensed is avoided.
Example 2
This example is an implementation of another variation of example 1. As shown in fig. 7, a crankcase heating and ventilation device 100 includes a ventilation tube 110, a temperature control device 120, a power cord 130, and a plug 140.
The vent tube 110 has an inlet end 150, a body 160, and an outlet end 170. The inner layer of the main body 160 is a pipe 200, and the pipe 200 is a nylon pipe. The pipeline 200 is wrapped by the foaming pipe 220, so that the heat preservation effect can be achieved. The pipeline 200 is wrapped by the heat shrinkage sheath 210, so that the function of preventing abrasion can be achieved; the flame-retardant heat-shrinkable sheath 210 can play a flame-retardant role. As shown in fig. 8, the air inlet 150 is a rubber tube (flexible joint), the rubber tube is locked with the fixing clip 260 of the main body 200, and the air inlet 150 has a bulge structure 230 matching with the rubber tube and the clip 260 to prevent the rubber tube from falling out; the air outlet end 170 is directly communicated with the atmosphere, and the bell mouth rubber sleeve is arranged on the air outlet end 170. The bell-mouth rubber sleeve can enlarge the flow area and effectively reduce the risk that the condensed water freezes to block the inner cavity of the ventilation pipe.
The working process of the crankcase heating ventilation device of the embodiment is as follows:
the temperature control device 120 is a temperature controller (KSD-5/80), the temperature controller is connected at 5 ℃ and below 5 ℃, the heating material 180 is communicated with the power line 130, and the heating material 180 is heated at the moment; the thermostat is turned off at 80 degrees and above 80 degrees, and the heating material 180 and the power cord 130 are cut off, at which time the heating material 180 is not heated. When the temperature rises from 5 ℃ or below 5 ℃ to a range of 5 ℃ to 80 ℃, the temperature controller is in a connection state, the heating material 180 is communicated with the power line 130, and the heating material 180 is heated; when the temperature is reduced from 80 degrees or 80 degrees to a range of less than 80 degrees and more than 5 degrees, the temperature controller is in an off state, the heating material 180 and the power line 130 are cut off, and the heating material 180 stops heating.
When in use, the air inlet end 150 of the ventilation pipe 110 is connected with an air outlet end (not shown) of the oil-gas separator, the air outlet end 170 of the ventilation pipe 110 is connected with an air inlet end (not shown) of the crankcase, which is positioned on the oil pan, and the plug 140 of the engine heating and ventilation device 100 is connected with an engine wiring harness plug (not shown). In a cold and low-temperature environment, when the vehicle stops working and the engine is turned off, mixed gas still exists in the ventilation pipe 110, and the mixed gas is easy to generate condensed water at the gas outlet end 170 to freeze; when the engine is started, ice blocks are frozen at the air outlet end 170, when the temperature control device 120 detects that the temperature of the position in contact with the ventilation pipe 110 is lower than 5 ℃, the temperature control device 120 is opened, the resistance wire (heating material 180) is powered through the plug 140, the power wire 130 and the temperature control device 120, the resistance wire (heating material 180) starts to be heated, heat conduction is carried out through the pipe wall of the main body 160, and then the temperature of the inner wall of the ventilation pipe 110 is increased. Meanwhile, the mixed gas from the gas inlet 150 has a high temperature, so that the inner wall of the ventilation pipe 110 can be heated, and ice blocks contacting with the mixed gas can be melted. When the temperature of the inner wall of the main body 160 is increased to be higher than 0 ℃, ice blocks in contact with the inner wall of the ventilation pipe 110 at the air outlet end 170 begin to melt into water, the melted water flows under the action of the pressure and gravity of mixed gas, meanwhile, the resistance wires (heating materials 180) on the ventilation pipe 110 continuously heat, more ice blocks melt into water, the frozen ice blocks can be melted under the action of heat generated by the mixed gas (when the ice blocks partially melt, the mixed gas can partially circulate at the beginning of the inner cavity of the ventilation pipe) at higher temperature and the heating materials, and the mixed gas can normally circulate in the inner cavity of the ventilation pipe 110.
When the vehicle runs in a cold low-temperature environment, when the temperature control device detects that the temperature of the position in contact with the ventilation pipe is 5 ℃ or lower than 5 ℃, the temperature control device 120 is opened, the resistance wire is powered by the plug 140, the power wire 130 and the temperature control device 120, the resistance wire is heated, the inner wall of the ventilation pipe 110 is heated through the pipe wall of the main body 160, and the temperature of the inner wall of the ventilation pipe 110 is increased. At this moment, the temperature of the inner wall of the ventilation pipe 110 is high, and when high-temperature mixed gas flows through the inner cavity of the ventilation pipe 110, the temperature difference between the high-temperature mixed gas and the inner wall of the ventilation pipe 110 is small, so that the phenomenon that water vapor condensed in the mixed gas freezes or more water vapor condensed is avoided.
Along with the continuous heating of the heating material, the temperature rise of the contact position of the temperature controller (the temperature control device 120) and the ventilation pipe 110 is between 5 and 80 ℃, the temperature controller is in a connection state (the temperature control device 120 is connected), the resistance wire (the heating material 180) is powered through the plug 140, the power wire 130 and the temperature control device 120, and the resistance wire is continuously heated.
As the resistance wire (heating material 180) continues to heat up to generate heat, the heat accumulates such that the temperature of the location where the temperature control device 120 contacts the vent tube 110 continues to rise. When the temperature of the contact position between the temperature control device and the ventilation pipe is 80 ℃ or higher than 80 ℃, the temperature control device 120 detects that the temperature of the contact position with the ventilation pipe is higher than 80 ℃, the temperature controller is disconnected or in a disconnected state (the temperature control device is disconnected), the temperature control device 120 enables the resistance wire (the heating material 180) to be powered off, and the resistance wire stops heating.
Since the vehicle is in a cold low-temperature environment, the cold air contacts the outer surface of the ventilation pipe 110, passes through the heat-shrinkable sheath 210, the foam pipe 220 and the pipe wall of the main body 160, and further cools the inner wall of the ventilation pipe 110, so that the temperature of the inner wall of the ventilation pipe 110 is reduced; when the temperature of the contact position of the temperature control device 120 and the ventilation pipe 110 is 5 degrees or more, the temperature controller is in a disconnected state. When the temperature of the contact position of the temperature control device 120 and the ventilation pipe 110 is 5 ℃ or lower than 5 ℃, the temperature control device detects that the temperature of the contact position with the ventilation pipe is 5 ℃ or lower than 5 ℃, the temperature controller (the temperature control device 120) is switched on, the plug 140, the power line 130 and the temperature control device 120 are communicated to supply power, the resistance wire starts to heat, and the heating process of the ventilation pipe is repeated.
The temperature control device 120 monitors the temperature of the position in contact with the ventilation pipe 110, is repeatedly switched on and off between 5 ℃ and 80 ℃, controls the resistance wire (heating material 180) to heat and stop heating, maintains the temperature of the inner wall of the ventilation pipe 110 in a proper range, reduces the temperature difference between high-temperature mixed gas and the inner wall of the ventilation pipe, and avoids the phenomenon that water vapor in the mixed gas freezes or more water vapor condenses.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition. In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
The examples of the present invention are illustrative of the present invention and not limiting thereof. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope and spirit of the invention. For example, some portion of the functionality illustrated or described for one particular mechanism may be used for another particular mechanism to yield a new mechanism. The heating and ventilation device in the embodiment can be used for a crankcase ventilation pipe on an engine to prevent water condensation of mixed gas in the ventilation pipe to further cause engine oil emulsification, can also be applied to the ventilation pipe of a vehicle oil tank to improve the intake air temperature to improve the extraction efficiency of fuel oil adsorbed on activated carbon in a carbon canister, and can be applied to a urea pipe for commercial vehicle exhaust aftertreatment to simplify the heating control of the urea pipe by adopting a temperature control device. Thus, the present invention is intended to embrace such modifications and variations as fall within the scope of the appended claims or equivalents thereof.
Claims (10)
1. An automatically controlled crankcase heating ventilation device is characterized by comprising a ventilation pipe, a temperature control device, a power line and a plug; the ventilation pipe is formed by sequentially connecting an air inlet end, a main body and an air outlet end, a heating material is arranged on the outer surface of the ventilation pipe and is connected with the temperature control device, and the temperature control device is connected with a power line and a plug to form a loop.
2. An automatically controlled crankcase ventilation unit as claimed in claim 1 wherein said temperature control means comprises a temperature control switch, wherein said temperature control switch is configured to be in contact with said heating material when a predetermined temperature is reached, depending on a predetermined temperature value; when the temperature is higher than the set temperature point, the heating material is disconnected, and the temperature control switch contact is disconnected; or according to a set temperature value, when the temperature is lower than a set temperature point, the heating material is communicated, and the temperature control switch contact is disconnected; when the temperature is higher than the set temperature point, the heating material is switched off, and the temperature control switch is switched on.
3. An automatically controlled crankcase heating ventilation device according to claim 1 wherein said temperature control switch is a bimetallic temperature control switch or a magnetically sensitive temperature control switch.
4. An automatically controlled crankcase heating ventilation device according to claim 2 wherein said temperature control means is temperature controlled in the range of 0-150 ℃.
5. An automatically controlled crankcase ventilation unit according to claim 3 wherein said thermostat is a normally closed or normally open thermostat.
6. An automatically controlled crankcase heating and ventilation unit as claimed in claim 1 wherein said ventilation tube is a metal tube, rubber tube, plastic tube or composite tube.
7. An automatically controlled crankcase ventilation unit as claimed in claim 1 wherein said heating material is a resistance wire or heating tape.
8. An automatically controlled crankcase heating ventilation device according to claim 1 wherein said heating material is wrapped with an insulating material for insulation and heat shielding.
9. An automatically controlled crankcase heating ventilation device according to claim 1 wherein said heating material is mounted on said body by being wound around said body or by being attached to said body in parallel juxtaposition.
10. An automatically controlled crankcase heating ventilation device according to claim 1 wherein said ventilation tube has a heating power in the range of 1 to 50000 watts per square meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110295235.8A CN113153489A (en) | 2021-03-19 | 2021-03-19 | Automatic crankcase heating ventilation unit of control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110295235.8A CN113153489A (en) | 2021-03-19 | 2021-03-19 | Automatic crankcase heating ventilation unit of control |
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| Publication Number | Publication Date |
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| CN113153489A true CN113153489A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110295235.8A Pending CN113153489A (en) | 2021-03-19 | 2021-03-19 | Automatic crankcase heating ventilation unit of control |
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| CN (1) | CN113153489A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6078730A (en) * | 1995-11-13 | 2000-06-20 | Fisher & Paykel Limited | Heat respiratory conduit |
| CN109578108A (en) * | 2018-12-26 | 2019-04-05 | 东风汽车集团有限公司 | A kind of diagnosis heating device, snorkel, ventilating system and automobile for crankcase breather |
| CN209129766U (en) * | 2018-10-22 | 2019-07-19 | 上海汽车集团股份有限公司 | A kind of air inlet pipe anti-freeze for ventilation system for automobile crankcase |
| CN211038776U (en) * | 2019-12-31 | 2020-07-17 | 安徽康明斯动力有限公司 | Respirator outlet duct of diesel engine |
| CN112377284A (en) * | 2020-11-30 | 2021-02-19 | 广西玉柴机器股份有限公司 | Anti-icing electric heating crankcase ventilation pipe |
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2021
- 2021-03-19 CN CN202110295235.8A patent/CN113153489A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6078730A (en) * | 1995-11-13 | 2000-06-20 | Fisher & Paykel Limited | Heat respiratory conduit |
| CN209129766U (en) * | 2018-10-22 | 2019-07-19 | 上海汽车集团股份有限公司 | A kind of air inlet pipe anti-freeze for ventilation system for automobile crankcase |
| CN109578108A (en) * | 2018-12-26 | 2019-04-05 | 东风汽车集团有限公司 | A kind of diagnosis heating device, snorkel, ventilating system and automobile for crankcase breather |
| CN211038776U (en) * | 2019-12-31 | 2020-07-17 | 安徽康明斯动力有限公司 | Respirator outlet duct of diesel engine |
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Application publication date: 20210723 |