CN111231604A - Micro-positive pressure system in cab - Google Patents
Micro-positive pressure system in cab Download PDFInfo
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- CN111231604A CN111231604A CN202010048546.XA CN202010048546A CN111231604A CN 111231604 A CN111231604 A CN 111231604A CN 202010048546 A CN202010048546 A CN 202010048546A CN 111231604 A CN111231604 A CN 111231604A
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- air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00378—Air-conditioning arrangements specially adapted for particular vehicles for tractor or load vehicle cabins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/24—Devices purely for ventilating or where the heating or cooling is irrelevant
- B60H1/26—Ventilating openings in vehicle exterior; Ducts for conveying ventilating air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H3/00—Other air-treating devices
- B60H3/0071—Electrically conditioning the air, e.g. by ionizing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H3/00—Other air-treating devices
- B60H3/06—Filtering
- B60H3/0608—Filter arrangements in the air stream
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a micro-positive pressure system in a cab, which comprises: the heat exchanger comprises a metal plate shell, an air inlet channel and an air exhaust channel, wherein the air inlet channel and the air exhaust channel are communicated with the inside and the outside of a cab, the air inlet channel and the air exhaust channel are communicated with the same total heat exchange core body, and an air inlet fan is arranged in the air inlet channel; an air exhaust fan is arranged in the air exhaust channel; the air inlet volume of the air inlet fan is larger than the air exhaust volume of the air exhaust fan, and the air pressure in the cab is kept larger than the air pressure outside the cab by 15-40 Pa. The invention has simple structure and reasonable design, solves the sealing problem of the lower cab in the environment with serious dust emission in a mining area, utilizes the micro-positive pressure environment to prevent external dust from easily entering the cab, realizes that the air temperature of inlet air and outlet air can be adapted to the environment even if a large temperature difference exists between the interior and the exterior of the cab through the total heat exchange core body, reduces the energy consumption of a cold-hot circulating device of a system, and ensures the comfort level in the cab.
Description
Technical Field
The invention relates to the field of supporting equipment of an off-highway wide-body dump truck. More particularly, the present invention relates to an in-cab micro-positive pressure system.
Background
The off-road wide-body dump truck is usually used for carrying out transportation work in places with much dust, and in the working process, as the cab is in an unsealed state, dust and the like are easy to enter the cab, on one hand, the short circuit of a circuit in the cab is easy to cause and the driving safety is influenced, on the other hand, the dust is also easy to enter the lung of a driver, and irreparable damage is caused to the body health of the driver; in order to avoid the above situation, a common treatment means is to seal the cab;
at present, the solution of sealing the cab of the off-highway wide-body dump truck in China is to reduce the leakage points of the cab and improve the self sealing of the cab by changing the sheet metal structure of the cab and increasing the using amount of sealant, but can not stop all the leakage points of the cab;
when the factors such as cost, technology and the like are considered in the self sealing process of the cab, the self sealing process can not be lifted any more, the self sealing process is limited by the dust environment with severe actual working conditions, finally, the internal air environment of the cab is not ideal enough, and meanwhile, when the external temperature difference in the cab is too large, the temperature adjusting system of the cab is greatly burdened.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a micro-positive pressure system in a cab, which has a simple structure and reasonable design, solves the sealing problem of the lower cab in the environment with serious dust emission in a mining area, utilizes the micro-positive pressure environment to prevent external dust from easily entering the cab, realizes that the air temperature of inlet air and outlet air can be adapted to the environment even if a large temperature difference exists between the inside and the outside of the cab through a total heat exchange core, reduces the energy consumption of a cold-hot circulating device of the system, and ensures the comfort level in the cab.
In order to achieve these objects and other advantages according to the present invention, there is provided an indoor micro-positive pressure system, comprising a sheet metal shell, an air intake channel and an air exhaust channel, wherein the air intake channel and the air exhaust channel are both communicated with the inside and the outside of a cab, the air intake channel and the air exhaust channel are both communicated with a same total heat exchange core, and an air intake fan is arranged in the air intake channel; an air exhaust fan is arranged in the air exhaust channel; the air inlet volume of the air inlet fan is larger than the air exhaust volume of the air exhaust fan, and the air pressure in the cab is kept larger than the air pressure outside the cab by 15-40 Pa.
Preferably, the air inlet fan and the air exhaust fan are in control connection through an electric control air pressure sensor.
Preferably, the air inlet of the air inlet channel is externally covered with an external air inlet grille, the air inlet of the air exhaust channel is externally covered with an internal air exhaust grille, the air outlet of the air exhaust channel is externally covered with an external air exhaust grille, and the air outlet of the air inlet channel is externally covered with an internal air inlet grille.
Preferably, an air inlet filter element is arranged in the air inlet channel and close to the position of the external air inlet grille, and an air exhaust filter element is arranged in the air exhaust channel between the internal air exhaust grille and the total heat exchange core body.
Preferably, an air inlet pressure maintaining air door assembly is arranged in the air inlet channel close to the air inlet of the air inlet channel.
Preferably, an air exhaust pressure maintaining air door assembly is arranged in the air exhaust channel close to the air outlet of the air exhaust channel.
Preferably, a negative ion generator is arranged in the air inlet channel.
Preferably, a time delay relay is arranged between the booster fans connected with the air inlet fan.
Preferably, a system restarting switch is connected with a power supply system of the micro-positive pressure system in the cab.
Preferably, the system also comprises a system control circuit which comprises a power supply, an ignition switch, two relays, a time delay relay, an electric control air pressure sensing controller and a system component; the system component comprises an anion generator, an exhaust motor, an exhaust fan of the exhaust fan, an air inlet motor and a booster fan of the air inlet fan;
the system control circuit is electrically connected through a control wire harness; specifically, the ignition switch controls the connection of a circuit power supply through a relay control system, the anion generator, the exhaust motor, the exhaust fan, the air inlet motor and the delay relay are all connected in parallel, and the electric control air pressure sensing controller is connected with another relay in series and then is in control connection with a main switch of the anion generator, the exhaust motor, the exhaust fan, the air inlet motor and the delay relay; the booster fan is directly communicated with the power supply, and the delay relay is connected with the switch control of the booster fan.
The invention at least comprises the following beneficial effects:
1. the air inlet fan and the air outlet fan are arranged, so that the air inlet amount of the air inlet fan is larger than that of the air outlet fan, the air pressure in the cab is in a micro-positive pressure state, and dust outside the environment cannot easily enter the cab because the air pressure of the cab is larger than the external air pressure, so that the problem of sealing the cab in the environment with serious dust emission in a mine area is solved, and meanwhile, the micro-positive pressure system is always in a ventilation state, so that a driver cannot feel suffocation, and fine dust is prevented from entering the cab, and adverse effects on circuits in the cab and the health of the driver are prevented;
2. the full heat exchange core body is arranged in the micro-positive pressure system, so that when the temperature difference between the inside and the outside of the cab is too large, the working load of the cab temperature control device cannot be increased due to frequent ventilation, the energy consumption is reduced, the comfort level of a driver is ensured, and the service life of the temperature control device is prolonged; the air quality in the cab can be further purified by the built-in negative ion generator, and the air quality in the cab is improved;
3. a time delay relay is arranged to control the operation of the booster fan, so that after the indoor and outdoor air pressure difference reaches 40Pa, the circuit is closed, the booster fan stops after continuously operating for 3 seconds, and the pressure maintaining function is realized; set up the negative pressure outage, can effectively remind the navigating mate to pay attention to in time clear up or change the filter screen, improve the result of use of device, create better driving environment for the driver's cabin, ensure that the navigating mate is healthy.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of an intra-cabin micro-positive pressure system according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a wind direction of a micro-positive pressure system in a cab according to one embodiment of the invention;
fig. 3 is a schematic diagram of a system control circuit of a micro-positive pressure system in a cab according to one embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1 to 3, the present invention provides an in-cab micro-positive pressure system, comprising:
the air inlet channel and the air exhaust channel are communicated with the inside and the outside of the cab and are communicated in a cross shape through a total heat exchange core body 2, and the total heat exchange core body 2 is used for exchanging heat in air for air inlet and air exhaust, so that the energy consumption of the temperature control device in the cab is stabilized; an air inlet fan 4 is arranged in the air inlet channel, and an air inlet fan and a booster fan are connected to the air inlet fan 4 in a control mode; an exhaust fan 13 is arranged in the exhaust channel; the air intake volume of the air intake fan 4 is greater than the air exhaust volume of the air exhaust fan 13, the air pressure in the cab is kept to be greater than the air pressure outside the cab by 15-40 Pa, so that the cab is in a micro-positive pressure state, dust and the like outside the cab cannot or cannot easily enter the cab due to the existence of the micro-positive pressure in the use process of the dump truck, the environment in the cab is polluted, and meanwhile, when the pressure difference between the inside and the outside of the cab is 15-40 Pa, the body of a driver cannot feel uncomfortable, and the driving safety is ensured; a layer of sound insulation sealing cotton is covered outside the sheet metal shell 19, so that the effect of reducing the use noise of the micro-positive pressure system is achieved;
by adopting the technical scheme, the air inlet fan 4 and the air outlet fan are arranged, so that the air inlet amount of the air inlet fan 4 is larger than the air inlet amount of the air outlet fan, the air pressure in the cab is in a micro-positive pressure state, and dust outside the environment cannot easily enter the cab because the air pressure of the cab is larger than the external air pressure, so that the sealing problem of the cab in the environment with serious dust emission in a mining area is solved, and meanwhile, as the micro-positive pressure system is always in a ventilation state, a driver cannot feel suffocation, and fine dust is prevented from entering the cab, so that adverse effects on circuits in the cab and the health of the driver are prevented; set up full heat exchange core 2 in the pressure-fired system, when the inside and outside difference in temperature of driver's cabin was too big, can not reduce the energy consumption because of frequent work burden that increases driver's cabin temperature control device takes a breath, guarantee navigating mate's comfort level, extension temperature control device's life.
In another aspect, an indoor micro positive pressure system includes: the air inlet channel and the air exhaust channel are communicated with the inside and the outside of the cab and are communicated in a cross shape through a total heat exchange core body 2, and the total heat exchange core body 2 is used for exchanging heat in air for air inlet and air exhaust, so that the energy consumption of the temperature control device in the cab is stabilized; an air inlet fan 4 is arranged in the air inlet channel; an exhaust fan 13 is arranged in the exhaust channel; the air intake volume of the air intake fan 4 is greater than the air exhaust volume of the air exhaust fan 13, the air pressure in the cab is kept to be greater than the air pressure outside the cab by 15-40 Pa, so that the cab is in a micro-positive pressure state, dust and the like outside the cab cannot or cannot easily enter the cab due to the existence of the micro-positive pressure in the use process of the dump truck, the environment in the cab is polluted, and meanwhile, when the pressure difference between the inside and the outside of the cab is 15-40 Pa, the body of a driver cannot feel uncomfortable, and the driving safety is ensured; the air inlet fan and the air exhaust fan are in control connection through an electric control air pressure sensor; the electric control air pressure sensor is provided with two air pressure monitoring probes, one probe is arranged inside and outside the room, the change of indoor and outdoor air pressure is monitored in real time, and when the difference between the indoor air pressure and the outdoor air pressure is more than or equal to 40Pa, the system is powered off; the pressure relief of the cab is natural leakage, the pressure is relieved to 15Pa within 5 seconds by the pressure difference of 40Pa, and the system is electrified to form a cycle;
the air inlet of the air inlet channel is externally covered with an external air inlet grille 9, the air inlet of the air exhaust channel is externally covered with an internal air exhaust grille 6, the air outlet of the air exhaust channel is externally covered with an external air exhaust grille 14, the air outlet of the air inlet channel is externally covered with an internal air inlet grille 3, and the external air inlet grille 9 and the internal air exhaust grille 6 are arranged to prevent dust from blocking the air inlet and exhaust channels, prevent foreign matters from entering a system and ensure the normal operation of a micro-positive pressure system in a cab; the external air exhaust grille 14 and the internal air inlet grille 3 are arranged, so that the noise generated by the running of a fan or a motor in the system can be reduced, and the use comfort of the micro-positive pressure system of the cab is improved.
In another aspect, an indoor micro positive pressure system includes: the air inlet channel and the air exhaust channel are communicated with the inside and the outside of the cab and are communicated in a cross shape through a total heat exchange core body 2, and the total heat exchange core body 2 is used for exchanging heat in air for air inlet and air exhaust, so that the energy consumption of the temperature control device in the cab is stabilized; an air inlet fan 4 is arranged in the air inlet channel; an exhaust fan 13 is arranged in the exhaust channel; the air intake volume of the air intake fan 4 is greater than the air exhaust volume of the air exhaust fan 13, the air pressure in the cab is kept to be greater than the air pressure outside the cab by 15-40 Pa, so that the cab is in a micro-positive pressure state, dust and the like outside the cab cannot or cannot easily enter the cab due to the existence of the micro-positive pressure in the use process of the dump truck, the environment in the cab is polluted, and meanwhile, when the pressure difference between the inside and the outside of the cab is 15-40 Pa, the body of a driver cannot feel uncomfortable, and the driving safety is ensured; the air inlet fan and the air exhaust fan are in control connection through an electric control air pressure sensor; the electric control air pressure sensor is provided with two air pressure monitoring probes, one probe is arranged inside and outside the room, the change of indoor and outdoor air pressure is monitored in real time, and when the difference between the indoor air pressure and the outdoor air pressure is more than or equal to 40Pa, the system is powered off; the pressure relief of the cab is natural leakage, the pressure is relieved to 15Pa within 5 seconds by the pressure difference of 40Pa, and the system is electrified to form a cycle; in addition, the air inlet of the air inlet channel is externally covered with an external air inlet grille 9, the air inlet of the air exhaust channel is externally covered with an internal air exhaust grille 6, the air outlet of the air exhaust channel is externally covered with an external air exhaust grille 14, the air outlet of the air inlet channel is externally covered with an internal air inlet grille 3, an air inlet filter element 8 is arranged in the air inlet channel and close to the position of the external air inlet grille 9, an air exhaust filter element 7 is arranged in the air exhaust channel between the internal air exhaust grille 6 and the total heat exchange core body 2, the quality of ventilation of the micro-positive pressure system in the cab can be further improved by arranging the air inlet filter element 8 and the air exhaust filter element 7, the air inlet filter element 8 is arranged, when the air quality outside the cab is poor, the air filter can play a role in filtering and purifying, and the exhaust filter element 7 is arranged to effectively filter impurities in the exhausted air, so that the system is prevented from being dirty and blocked.
In another aspect, an indoor micro positive pressure system includes: the air inlet channel and the air exhaust channel are communicated with the inside and the outside of the cab and are communicated in a cross shape through a total heat exchange core body 2, and the total heat exchange core body 2 is used for exchanging heat in air for air inlet and air exhaust, so that the energy consumption of the temperature control device in the cab is stabilized; an air inlet fan 4 is arranged in the air inlet channel; an exhaust fan 13 is arranged in the exhaust channel; the air intake volume of the air intake fan 4 is greater than the air exhaust volume of the air exhaust fan 13, the air pressure in the cab is kept to be greater than the air pressure outside the cab by 15-40 Pa, so that the cab is in a micro-positive pressure state, dust and the like outside the cab cannot or cannot easily enter the cab due to the existence of the micro-positive pressure in the use process of the dump truck, the environment in the cab is polluted, and meanwhile, when the pressure difference between the inside and the outside of the cab is 15-40 Pa, the body of a driver cannot feel uncomfortable, and the driving safety is ensured; the air inlet fan and the air exhaust fan are in control connection through an electric control air pressure sensor; the electric control air pressure sensor is provided with two air pressure monitoring probes, one probe is arranged inside and outside the room, the change of indoor and outdoor air pressure is monitored in real time, and when the difference between the indoor air pressure and the outdoor air pressure is more than or equal to 40Pa, the system is powered off; the pressure relief of the cab is natural leakage, the pressure is relieved to 15Pa within 5 seconds by the pressure difference of 40Pa, and the system is electrified to form a cycle; an air inlet pressure maintaining air door assembly 10 is arranged in the air inlet channel close to the air inlet of the air inlet channel; be close to be equipped with air exhaust pressurize air door subassembly 15 in the passageway of airing exhaust of passageway air outlet, wherein, air inlet pressurize air door subassembly 10 includes: the air inlet motor 11 drives the rotating shaft to rotate so as to adjust the area of the closed air inlet of the air inlet sealing plate body, and further adjust the air quantity; the pressurize air door subassembly 15 of airing exhaust includes: the air exhaust device comprises an air exhaust motor 12 and an air exhaust sealing plate body with a rotating shaft, wherein the air exhaust motor 12 drives the rotating shaft to rotate so as to adjust the area of an air exhaust opening closed by the air exhaust sealing plate body and further adjust the air output; by adopting the technical scheme, the pressure relief of the cab can be effectively delayed.
In another aspect, an indoor micro positive pressure system includes: the air inlet channel and the air exhaust channel are communicated with the inside and the outside of the cab and are communicated in a cross shape through a total heat exchange core body 2, and the total heat exchange core body 2 is used for exchanging heat in air for air inlet and air exhaust, so that the energy consumption of the temperature control device in the cab is stabilized; an air inlet fan 4 is arranged in the air inlet channel; an exhaust fan 13 is arranged in the exhaust channel; the air intake volume of the air intake fan 4 is greater than the air exhaust volume of the air exhaust fan 13, the air pressure in the cab is kept to be greater than the air pressure outside the cab by 15-40 Pa, so that the cab is in a micro-positive pressure state, dust and the like outside the cab cannot or cannot easily enter the cab due to the existence of the micro-positive pressure in the use process of the dump truck, the environment in the cab is polluted, and meanwhile, when the pressure difference between the inside and the outside of the cab is 15-40 Pa, the body of a driver cannot feel uncomfortable, and the driving safety is ensured; in addition, an external air inlet grille 9 is externally covered on the air inlet of the air inlet channel, an internal air exhaust grille 6 is externally covered on the air inlet of the air exhaust channel, an external air exhaust grille 14 is externally covered on the air outlet of the air exhaust channel, an internal air inlet grille 3 is externally covered on the air outlet of the air inlet channel, an air inlet filter element 8 is arranged in the air inlet channel at a position close to the external air inlet grille 9, an air exhaust filter element 7 is arranged in the air exhaust channel between the internal air exhaust grille 6 and the total heat exchange core 2 in the air exhaust channel, and an air inlet pressure maintaining air door assembly 10 is arranged in the air inlet channel close to the air inlet; be close to be equipped with air exhaust pressurize air door subassembly 15 in the passageway of airing exhaust of passageway air outlet, wherein, air inlet pressurize air door subassembly 10 includes: the air inlet motor 11 drives the rotating shaft to adjust the area of the closed air inlet of the air inlet sealing plate body, and then the air quantity is adjusted; the pressurize air door subassembly 15 of airing exhaust includes: the air exhaust device comprises an air exhaust motor 12 and an air exhaust sealing plate body with a rotating shaft, wherein the air exhaust motor 12 drives the rotating shaft to adjust the area of an air exhaust opening closed by the air exhaust sealing plate body, so that the air output is adjusted; the air inlet pipeline is also internally provided with a negative ion generator 5 for carrying out secondary purification on inlet air;
in addition, the micro-positive pressure system in the cab is also provided with a system control circuit, which comprises: the system comprises a power supply, an ignition switch, two relays, a delay relay 17, an electric control air pressure sensing controller 1 and a system component;
wherein, the system components comprise a negative ion generator 5, an exhaust motor 12, an exhaust fan, an air inlet motor 11 and a booster fan;
the system control circuit is electrically connected through a control wiring harness 16; specifically, an ignition switch controls the connection of a circuit power supply through a relay control system, the anion generator 5, the exhaust motor 12, the exhaust fan, the air inlet motor 11 and the delay relay 17 are all connected in parallel, and the electrically controlled air pressure sensing controller 1 is connected with another relay in series and then is in control connection with the main switches of the anion generator 5, the exhaust motor 12, the exhaust fan, the air inlet motor 11 and the delay relay 17; the booster fan is directly communicated with the power supply, and the delay relay 17 is in control connection with a switch of the booster fan; by adopting the technical scheme, the system is safer and more efficient in the operation process, the operation of the booster fan is controlled by arranging the delay relay 17, so that the circuit is closed after the indoor and outdoor air pressure difference reaches 40Pa, the booster fan stops after continuously operating for 3 seconds, the booster fan is delayed to be closed, and the pressure maintaining function of the micro-positive pressure system is realized; in addition, compared with an air exhaust filter screen, the air inlet filter screen is easier to dirty and block; in this case, negative pressure may be formed between the air pressure in the cab and the outside, outdoor dust can more easily enter the cab, when the negative pressure reaches-10 Pa, the circuit is disconnected, the micro-positive pressure system stops working to remind the driver to clean or replace the filter screen, and then the system restart switch 18 connected with the power supply is pressed, so that the system operates normally again.
The air inlet fan and the air exhaust fan are in control connection through an electric control air pressure sensor; the electric control air pressure sensor is provided with two air pressure monitoring probes, one probe is arranged inside and outside the room, the change of the indoor and outdoor air pressure is monitored in real time, when the difference between the indoor air pressure and the outdoor air pressure is more than or equal to 40Pa, a system circuit is automatically closed, and an air inlet pressure maintaining air door is closed; the pressure relief of the cab is natural leakage, the pressure of the cab is reduced to 15Pa within 5 seconds by 40Pa air pressure difference, a system control circuit is restarted, and the air inlet pressure maintaining air door is opened to form a cycle.
The micro-positive pressure system has the following specific air inlet and exhaust paths:
air inlet path: fresh air outside the cab → external air inlet grille 9 → air inlet filter element 8 → air inlet pressure maintaining damper assembly 10 → total heat exchange core 2 → anion generator 5 → air inlet fan 4 → inside the cab
Air exhaust path: inside the cab, turbid air → the inner air inlet grille 3 → the exhaust filter element 7 → the total heat exchange core 2 → the exhaust pressure maintaining damper assembly 15 → the exhaust fan 13 → outside the cab
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention to an in-cab micro-positive pressure system will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. The micro-positive pressure system in the cab comprises a sheet metal shell, an air inlet channel and an air exhaust channel, wherein the air inlet channel and the air exhaust channel are communicated with the inside and the outside of the cab; an air exhaust fan is arranged in the air exhaust channel; the air inlet volume of the air inlet fan is larger than the air exhaust volume of the air exhaust fan, and the air pressure in the cab is kept larger than the air pressure outside the cab by 15-40 Pa.
2. The micro-positive pressure system in the cab of claim 1, wherein the intake air blower and the exhaust air blower are in control connection through an electrically controlled air pressure sensor.
3. The micro-positive pressure system in the cab of claim 1, wherein an external air inlet grille covers an air inlet of the air inlet channel, an internal air exhaust grille covers an air inlet of the air exhaust channel, an external air exhaust grille covers an air outlet of the air exhaust channel, and an internal air inlet grille covers an air outlet of the air inlet channel.
4. The micro-positive pressure system in the cab of claim 3, wherein an air intake filter element is disposed in the air intake channel at a position close to the external air intake grille, and an air exhaust filter element is disposed in the air exhaust channel between the internal air exhaust grille and the total heat exchange core.
5. The system of claim 1, wherein an inlet pressure maintaining damper assembly is disposed in the inlet duct adjacent to the inlet of the inlet duct.
6. The system of claim 1, wherein an exhaust pressure maintaining damper assembly is disposed in the exhaust channel adjacent to the outlet of the exhaust channel.
7. The micro-positive pressure system in the cab of claim 1, wherein a negative ion generator is disposed in the air intake channel.
8. The system of claim 1, wherein a booster fan coupled to the intake air blower is controlled by a time delay relay.
9. The system of claim 1, wherein a reset switch is connected to a power source of the system.
10. The cabin interior micro positive pressure system of claim 1, further comprising: the air conditioner comprises an air inlet pressure maintaining air door, an air exhaust pressure maintaining air door and a system control circuit, wherein the system control circuit comprises a power supply, an ignition switch, two relays, a time delay relay, an electric control air pressure sensing controller and a system component; the system component comprises an anion generator, an exhaust motor, an exhaust fan of the exhaust fan, an air inlet motor and a booster fan of the air inlet fan;
the system control circuit is electrically connected through a control wire harness; specifically, the ignition switch controls the connection of a circuit power supply through a relay control system, the anion generator, the exhaust motor, the exhaust fan, the air inlet motor and the delay relay are all connected in parallel, and the electric control air pressure sensing controller is connected with another relay in series and then is in control connection with a main switch of the anion generator, the exhaust motor, the exhaust fan, the air inlet motor and the delay relay; the booster fan is directly communicated with the power supply, and the delay relay is connected with the switch control of the booster fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010048546.XA CN111231604A (en) | 2020-01-16 | 2020-01-16 | Micro-positive pressure system in cab |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010048546.XA CN111231604A (en) | 2020-01-16 | 2020-01-16 | Micro-positive pressure system in cab |
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| CN111231604A true CN111231604A (en) | 2020-06-05 |
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| CN202010048546.XA Pending CN111231604A (en) | 2020-01-16 | 2020-01-16 | Micro-positive pressure system in cab |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303858A (en) * | 2020-10-31 | 2021-02-02 | 山东驭康医疗科技有限公司 | Indoor micro-positive pressure control method |
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2020
- 2020-01-16 CN CN202010048546.XA patent/CN111231604A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303858A (en) * | 2020-10-31 | 2021-02-02 | 山东驭康医疗科技有限公司 | Indoor micro-positive pressure control method |
| CN112303858B (en) * | 2020-10-31 | 2022-02-25 | 山东驭康医疗科技有限公司 | Indoor micro-positive pressure control method |
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