CN108224930B - Hot air drying system of single-circulation fan - Google Patents
Hot air drying system of single-circulation fan Download PDFInfo
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- CN108224930B CN108224930B CN201810025353.5A CN201810025353A CN108224930B CN 108224930 B CN108224930 B CN 108224930B CN 201810025353 A CN201810025353 A CN 201810025353A CN 108224930 B CN108224930 B CN 108224930B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a hot air drying system of a single circulation fan, and belongs to the field of drying devices. The single circulation fan hot air drying system includes: the circulating fan is arranged on the communication pipeline and is used for discharging gas in the exhaust pipeline into the air supply pipeline; one end of each drying unit is communicated with the air supply pipeline, and the other end is communicated with the air exhaust pipeline; wherein, at least one drying unit is not provided with a fan; the drying units are respectively provided with an air inlet regulating valve, and the air inlet regulating valves are used for controlling the flow rate of the air entering the drying units from the air supply pipeline. The hot air drying system can supply air to each drying unit by only one circulating fan under the condition that fans are not needed on each drying unit, and the flow rate of the air entering each drying unit can be controlled as well, so that the consumption of the fans can be effectively reduced.
Description
Technical Field
The invention relates to the field of drying devices, in particular to a single-circulation fan hot air drying system.
Background
The hot air drying equipment is a main energy consumption unit of printing, compounding, coating, spraying and painting production equipment, and is also a main emission source of waste gas, and the efficiency of the hot air drying equipment is a core parameter of a performance evaluation index of the production equipment.
The shells of the traditional hot air drying equipment, such as a drying fan, a heater, an air pipe and the like, are directly exposed in the air of a workshop, so that leakage is easy to occur in the air, heat can be lost through the air, and the drying fan can generate high-decibel noise when working, so that the hot air drying equipment is a main noise pollution source of the workshop.
In the working process of the hot air drying equipment, a certain amount of unorganized emission exists, and the key areas of the unorganized emission are as follows: blower housing gaps, air duct gaps, etc. The waste gases discharged in an unorganized way are high-temperature and high-VOC-concentration gases, the heat brought out of the drying equipment causes the increase of energy consumption, and meanwhile, the gases are dispersed into workshops and are difficult to purify, so that the air is polluted, and the health of workers is influenced.
Disclosure of Invention
The invention provides a single-circulation fan hot air drying system, and aims to solve the problems of the hot air drying system in the prior art.
The invention is realized in the following way:
a single circulation fan hot air drying system comprising:
the circulating fan is arranged on the communicating pipeline, one end of the communicating pipeline is communicated with the air supply pipeline, the other end of the communicating pipeline is communicated with the air exhaust pipeline, and the circulating fan is used for exhausting the air in the air exhaust pipeline into the air supply pipeline;
the exhaust pipeline is connected with an exhaust fan, and the exhaust fan is used for exhausting gas in the exhaust pipeline;
the drying units are respectively communicated with the air supply pipeline at one end and the exhaust pipeline at the other end;
wherein at least one drying unit is not provided with a fan;
and the drying units are respectively provided with an air inlet regulating valve, and the air inlet regulating valves are used for controlling the flow rate of the air entering the drying units from the air supply pipeline.
In a preferred embodiment of the present invention, the drying unit further comprises:
a drying box;
the air inlet pipeline is communicated with the air supply pipeline at one end, the drying box at the other end and the air inlet pipeline at the other end, and the air inlet regulating valve is arranged on the air inlet pipeline;
one end of the air outlet pipeline is communicated with the air exhaust pipeline, and the other end of the air outlet pipeline is communicated with the drying box;
the solvent usage amount in the drying oven close to the outlet of the exhaust pipe is larger than that in the drying oven far away from the outlet of the exhaust pipe.
In a preferred embodiment of the present invention, the drying unit further includes a first heating member, where the first heating member is disposed on the air intake duct, and the first heating member is configured to heat the air in the air intake duct.
In a preferred embodiment of the present invention, the air outlet pipe is provided with an air outlet regulating valve, and the air outlet regulating valve is used for controlling the flow rate of the air entering the air exhaust pipe from the drying oven.
In a preferred embodiment of the present invention, a second heating element is provided on the communication pipe, and the second heating element is used for heating the gas in the communication pipe.
In a preferred embodiment of the present invention, the air supply pipe is connected with a fresh air pipe, the fresh air pipe is provided with a fresh air port, the fresh air pipe is used for introducing air in an external environment into the air supply pipe through the fresh air port, and the air supply pipe is a static pressure box.
In a preferred embodiment of the present invention, the air conditioner further comprises a heat exchanger, wherein one inlet of the heat exchanger is communicated with the air exhaust pipeline, the other inlet of the heat exchanger is connected with the fresh air pipeline, and the heat exchanger is used for conducting heat of air exhausted from the air exhaust pipeline to air in the fresh air pipeline.
In a preferred embodiment of the present invention, the fresh air duct is provided with a fresh air adjusting valve, and the fresh air adjusting valve is used for adjusting the flow rate of the air entering the air supply duct from the fresh air port.
In a preferred embodiment of the present invention, the air outlet pipe is provided with a first filtering piece, and the first filtering piece is used for filtering the air entering the air exhaust pipe from the air outlet pipe;
the fresh air pipeline is provided with a second filtering piece, and the second filtering piece is used for filtering gas entering the fresh air pipeline from the fresh air port.
In a preferred embodiment of the invention, the exhaust fan and the circulating fan are both variable frequency fans;
the exhaust pipeline is provided with a first pressure sensor which is used for monitoring the air pressure in the exhaust pipeline;
the air inlet pipeline is provided with a temperature sensor, and the temperature sensor is used for detecting the temperature in the air inlet pipeline;
the air inlet pipeline is provided with a second pressure sensor which is used for detecting the air pressure in the air inlet pipeline;
the first pressure sensor, the temperature sensor, the second pressure sensor, the exhaust fan and the circulating fan are all electrically connected with a controller, and the controller is used for controlling the frequencies of the exhaust fan and the circulating fan according to the information of the first pressure sensor, the temperature sensor and the second pressure sensor.
The beneficial effects of the invention are as follows:
according to the single-circulation fan hot air drying system obtained through the design, when the single-circulation fan hot air drying system is used, the air in the circulation pipeline can be sent into each drying unit by using the circulation fan, the air inlet regulating valve can respectively control the flow rate of the air entering each drying unit, so that the air can be supplied to each drying unit by only one circulation fan under the condition that the fan is not needed on each drying unit, the flow rate of the air entering each drying unit can be controlled, the consumption of the fan can be effectively reduced, the fan can be subjected to centralized treatment, and the noise pollution caused by the fan can be effectively reduced; the unorganized emission of dry gas caused by gaps of the blower housing is reduced; the amount of the fans is reduced, so that gaps possibly caused by connection of the fans and each pipeline are reduced, and the unorganized emission of the drying gas can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a single circulation fan hot air drying system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single circulation fan hot air drying system with a heat exchanger according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a drying unit in a single circulation fan hot air drying system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of connection between a heat exchanger and a fresh air pipeline in a single circulation fan hot air drying system according to an embodiment of the present invention.
Icon: 100-a single-circulation fan hot air drying system; 110-an exhaust duct; 111-an exhaust fan; 112-a first pressure sensor; 120-a fresh air pipeline; 121-a fresh air port; 122-a second filter; 123-fresh air regulating valve; 124-heat exchanger; 130-a drying unit; 131-an air outlet regulating valve; 132-an air outlet pipeline; 133-a first filter; 134-a drying oven; 135-a temperature sensor; 136-an air inlet pipeline; 137-a second pressure sensor; 138-a first heating element; 139-an air inlet regulating valve; 140-communicating pipes; 141-a circulating fan; 142-a second heating element; 150-air supply pipeline.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.
Example 1
The present embodiment provides a single circulation fan hot air drying system 100, please refer to fig. 1, 2, 3 and 4, and the single circulation fan hot air drying system 100
A single circulation fan hot air drying system 100 comprising:
the circulating fan 141, the circulating fan 141 is set up on communicating tube 140, one end of communicating tube 140 communicates with air supply pipeline 150, another end communicates with exhaust duct 110, the circulating fan 141 is used for discharging the gas in the exhaust duct 110 into air supply pipeline 150;
the exhaust pipeline 110 is connected with an exhaust fan 111, and the exhaust fan 111 is used for exhausting gas in the exhaust pipeline 110;
a plurality of drying units 130, wherein one ends of the drying units 130 are communicated with the air supply pipeline 150, and the other ends of the drying units are communicated with the air exhaust pipeline 110;
wherein, no fan is arranged on at least one drying unit 130;
the plurality of drying units 130 are each provided with an air inlet regulating valve 139, and the air inlet regulating valve 139 is used for controlling the flow rate of the air entering the drying units 130 from the air supply pipeline 150.
The air inlet pipeline 136 is communicated with the air exhaust pipeline 110 through the communication pipeline 140, the circulating fan 141 on the communication pipeline 140 can be utilized to discharge the air on the air exhaust pipeline 110 into the air inlet pipeline 136, two ends of the drying units 130 are respectively communicated with the air supply pipeline 150 and the air exhaust pipeline 110, the discharged air in the drying units 130 can be utilized by the drying units 130 again, so that the discharge amount of waste gas can be reduced, and the concentration of VOC in the waste gas can be improved.
Since the inside of each drying unit 130 has no fan, the air is supplied to the drying unit 130 only by the circulating fan 141 on the circulating pipeline, which results in that the air entering each drying unit 130 is not controlled, and in order to control the flow rate of the air in each drying unit 130, an air inlet regulating valve 139 is provided on each drying unit 130, and the flow rate of the air entering the corresponding drying unit 130 is controlled by each air inlet regulating valve 139, so that the control of the flow rate of the air entering each drying unit 130 can be realized without a fan.
The quantity of the fans is reduced, the distribution range of the fans is also reduced, and the defects of serious noise pollution, leakage of dry gas and the like of the fans can be overcome by carrying out centralized management on the circulating fan 141 and the exhaust fan 111.
In this embodiment, one end of each drying unit 130 is separately connected to the air supply duct 150, and the other end of each drying unit 130 is separately connected to the air exhaust duct 110.
Alternatively, in the present embodiment, the solvent usage in the drying oven 134 near the outlet of the exhaust duct 110 is greater than the solvent usage in the drying oven 134 far from the outlet of the exhaust duct 110.
The drying cabinet 134 with larger solvent usage amount is closer to the outlet of the exhaust pipeline 110, so that the highest VOC concentration of the outlet of the exhaust pipeline 110 can be realized, the safety performance of the whole system can be detected by installing the VOC concentration detection device at the outlet of the exhaust pipeline 110, and the VOC concentration of the exhaust pipeline 110 is in a safety range only.
Optionally, in this embodiment, the drying unit 130 further includes:
a drying oven 134;
an air inlet pipe 136, one end of the air inlet pipe 136 is communicated with an air supply pipe 150, the other end of the air inlet pipe 136 is communicated with the drying box 134, and an air inlet regulating valve 139 is arranged on the air inlet pipe 136;
and one end of the air outlet pipeline 132 is communicated with the air exhaust pipeline 110, and the other end of the air outlet pipeline 132 is communicated with the drying box 134.
The drying box 134 is utilized to dry materials to be dried, the air inlet pipeline 136 can introduce the air in the air feeding and separating pipeline into the drying box 134, the air inlet regulating valve 139 is arranged on the air inlet pipeline 136, and the flow rate of the air entering the drying box 134 can be realized by controlling the flow rate of the air in the air inlet pipeline 136; the air outlet duct 132 may lead air inside the drying oven 134 into the air exhaust duct 110.
Optionally, in this embodiment, the drying unit 130 further includes a first heating element 138, where the first heating element 138 is disposed on the air intake 136, and the first heating element 138 is configured to heat the air in the air intake 136.
The first heating element 138 in the drying unit 130 can heat the air in the air inlet pipe 136, so that the temperature of the air entering the drying box 134 can be ensured to meet the operation requirement of the drying box 134.
In this embodiment, the first heating element 138 may be a heating wire or a high-temperature medium.
Wherein the high temperature medium includes, but is not limited to: hot water, heat conducting oil, steam and hot air.
The high-temperature medium is used as a heat source, so that the waste heat of the waste gas incineration device, solar energy and other cheap heat sources can be conveniently utilized, and the economic benefit of the drying system is improved.
Specifically, in the present embodiment, the air outlet pipe 132 is provided with an air outlet adjusting valve 131, and the air outlet adjusting valve 131 is used to control the flow rate of the air entering the air exhaust pipe 110 from the drying oven 134.
The air outlet regulating valve 131 on the air outlet pipeline 132 can control the flow rate of the air flow discharged from the drying box 134 into the air exhaust pipeline 110, the air pressure in the air exhaust pipeline 110 can be negative pressure by using the air exhaust fan 111, and the interior of the drying box 134 can be kept in a micro negative pressure state by controlling the air outlet regulating valve 131, so that the drying box 134 can be kept in an effective working state, and the air in the external environment inhaled in a gap existing in the drying box 134 can be kept in a lower range, thereby being beneficial to reducing the air in the external environment inhaled in the gap of the drying box 134.
In this embodiment, the micro negative pressure state is a pressure between 0.8 and 1 atmosphere.
Alternatively, in the present embodiment, the second heating element 142 is disposed on the communication pipe 140, and the second heating element 142 is used for heating the gas in the communication pipe 140.
The second heating element 142 on the communication pipe 140 heats the gas in the communication pipe 140, so that the gas in the communication pipe 140 can be preheated in advance before entering the air supply pipe 150, which is beneficial to controlling the temperature of the gas entering the drying oven 134.
Alternatively, in the present embodiment, the connection between the communication duct 140 and the air supply duct 150 is located at the middle of the air supply duct 150.
Since the air in the communication pipeline 140 enters the air supply pipe and there is air resistance, and the air pressures entering the drying units 130 from the air supply pipeline 150 are different due to different air resistances, the air pressures of the drying units 130 at the connection positions of the communication pipeline 140 and the air supply pipeline 150 are balanced by locating the connection positions of the communication pipeline 140 and the air supply pipeline 150 in the middle of the air supply pipeline 150, and the uniformity of the air in the drying units 130 is improved.
Optionally, in this embodiment, the air supply duct 150 is connected to a fresh air duct 120, the fresh air duct 120 has a fresh air port 121, and the fresh air duct 120 is used for introducing air in an external environment into the air supply duct 150 through the fresh air port 121.
The fresh air ports 121 on the fresh air duct 120 may be provided in plural, and the plural fresh air ports 121 may be disposed at a position where the concentration of the polluted gas in the external environment is high, so that the polluted gas in the external environment may be sucked into the air supply duct 150, and the effect of purifying the air in the external environment is achieved.
Alternatively, in this embodiment, the supply air duct 150 is a static pressure tank.
Since the internal air pressure of the static pressure tank is stable, it is possible to ensure uniform air flow into the drying unit 130.
Optionally, in this embodiment, the air conditioner further includes a heat exchanger 124, where one inlet of the heat exchanger 124 is communicated with the air exhaust duct 110, and the other inlet of the heat exchanger 124 is connected to the fresh air duct 120, and the heat exchanger 124 is used to transfer heat of the air exhausted from the air exhaust duct 110 to the air in the fresh air duct 120.
The heat exchanger 124 can exchange the heat of the gas exhausted from the exhaust pipe 110 with the gas in the fresh air pipe 120, so as to reduce the temperature of the gas exhausted from the exhaust pipe 110, improve the temperature of the gas in the fresh air pipe 120, and achieve the purpose of preheating the gas to be exhausted from the exhaust pipe 110 as the gas in the fresh air pipe 120, thereby effectively saving energy consumption and improving energy utilization rate.
Specifically, in the present embodiment, the fresh air duct 120 has a fresh air adjusting valve 123, and the fresh air adjusting valve 123 is used to adjust the flow rate of the air entering the air supply duct 150 from the fresh air port 121.
The fresh air regulating valve 123 can control the flow rate of the air in the fresh air duct 120, so that the flow rate of the air entering the air supply duct 150 through the fresh air duct 120 can be controlled, the flow rate of the air in the fresh air duct 120 can be increased under the condition that the air exhausted by the exhaust duct is more, and the flow rate of the air in the fresh air duct 120 can be reduced under the condition that the air exhausted by the exhaust duct is less.
Optionally, in this embodiment, the air outlet pipe 132 has a first filter 133 thereon, and the first filter 133 is used to filter the air entering the exhaust pipe 110 from the air outlet pipe 132;
the fresh air duct 120 has a second filter 122 thereon, and the second filter 122 is used for filtering the gas entering the fresh air duct 120 from the fresh air port 121.
The first filter 133 is disposed on the air outlet pipe 132 to prevent foreign matters in the drying oven 134 from entering the exhaust pipe 110, thereby improving the safety of system operation.
The second filter 122 is disposed on the fresh air duct 120, so that foreign matters in the external environment can be prevented from entering the air supply duct 150, and the safety of the system operation can be improved.
Alternatively, in this embodiment, the exhaust fan 111 and the circulation fan 141 are both variable frequency fans;
the exhaust pipe 110 is provided with a first pressure sensor 112, and the first pressure sensor 112 is used for monitoring the air pressure in the exhaust pipe 110;
the air inlet pipe 136 is provided with a temperature sensor 135, and the temperature sensor 135 is used for detecting the temperature in the air inlet pipe 136;
the air inlet pipe 136 is provided with a second pressure sensor 137, and the second pressure sensor 137 is used for detecting the air pressure in the air inlet pipe 136;
the first pressure sensor 112, the temperature sensor 135, the second pressure sensor 137, the exhaust fan 111 and the circulation fan 141 are electrically connected to a controller for controlling frequencies of the exhaust fan 111 and the circulation fan 141 according to information of the first pressure sensor 112, the temperature sensor 135 and the second pressure sensor 137.
Optionally, in this embodiment, the variable frequency fan may be a variable frequency fan with a model G-100A manufactured by nux vomica, which is a prior art well known to those skilled in the art, and the specific structure, the connection relationship between structures, and the power supply mode and the use method during use are all the prior art, which are not described herein again.
Alternatively, in this embodiment, the first pressure sensor 112 and the second pressure sensor 137 may be pressure sensors with the model of CYYZ11 manufactured by beijing star sensor technology limited, and the pressure sensors may measure the pressure of gas or liquid, and are electronic elements well known to those skilled in the art, and the specific structure, the connection manner between the structures, the power supply manner during use, the use method, and the like are all of the prior art and are not described herein.
Alternatively, in this embodiment, the controller may be an integrated circuit chip having signal processing capabilities. Such a controller may be packaged using model number LPC1114FDB48, LQFP 48. The controller is a prior art well known to those skilled in the art, and the specific structure, connection relationship between the structures, and power supply mode and use method during use are all the prior art, and are not described herein.
Optionally, in this embodiment, the power supply of the exhaust fan 111 and the circulation fan 141 may be performed by using a power grid power supply or a battery power supply, and the specific power supply mode is the prior art and will not be described herein.
Alternatively, in this embodiment, the temperature sensor 135 may be a sensor manufactured by Huai instruments, with model number WZP-100, and the temperature sensor 135 is a prior art well known to those skilled in the art, and the specific structure, connection between structures, and power supply mode and usage method during use are all prior art and are not described herein.
When the air conditioner is used, the air inlet regulating valves 139 and the air outlet regulating valves 131 are firstly regulated to the state of maximum opening, the frequency of the air exhaust fan 111 is regulated to the maximum, the air pressure in the air exhaust pipeline 110 is negative pressure, then the frequency of the circulating fan 141 is gradually increased, the air pressure in the air exhaust pipeline 110 is kept at a certain negative pressure, then the air inlet regulating valves 139 are regulated, the flow rate of air entering the drying boxes 134 reaches the requirement, and then the air outlet regulating valves 131 are regulated, so that the inside of the drying boxes 134 is kept at a micro negative pressure state.
The air pressure in the exhaust duct 110 can be detected by the first pressure sensor 112, the air pressure in the air intake duct 136 can be detected by the second pressure sensor 137, and in this embodiment, the second pressure sensor 137 is disposed between the air intake regulating valve 139 and the drying oven 134, and since the pressure of the air between the air intake regulating valve 139 and the drying oven 134 is the same as the air pressure in the drying oven 134, the air pressure in the drying oven 134 can be measured by the second pressure sensor 137.
Specifically, in this embodiment, the negative pressure is less than one atmosphere.
The working principle of the single circulation fan hot air drying system 100 provided in this embodiment is that, when in operation, the circulation fans 141 can be used to send the gas in the circulation pipeline into each drying unit 130, the air inlet regulating valves 139 can respectively control the flow rate of the gas entering each drying unit 130, so that the supply of the gas to each drying unit 130 can be realized by only one circulation fan 141 under the condition that no fan is needed on each drying unit 130, and the flow rate of the gas entering each drying unit 130 can be controlled as well, so that the consumption of the fans can be effectively reduced, the fans can be subjected to centralized treatment, and the noise pollution brought by the fans can be effectively reduced; the unorganized emission of dry gas caused by gaps of the blower housing is reduced; the amount of the fans is reduced, so that gaps possibly caused by connection of the fans and each pipeline are reduced, and the unorganized emission of the drying gas can be reduced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A single circulation fan hot air drying system, comprising:
the circulating fan is arranged on the communicating pipeline, one end of the communicating pipeline is communicated with the air supply pipeline, the other end of the communicating pipeline is communicated with the air exhaust pipeline, and the circulating fan is used for exhausting the air in the air exhaust pipeline into the air supply pipeline;
the drying units are respectively communicated with the air supply pipeline at one end and the exhaust pipeline at the other end;
wherein at least one drying unit is not provided with a fan;
the drying units are respectively provided with an air inlet regulating valve, and the air inlet regulating valves are used for controlling the flow rate of the air entering the drying units from the air supply pipeline;
the exhaust pipeline is connected with an exhaust fan, and the exhaust fan is used for exhausting gas in the exhaust pipeline;
the drying unit comprises a drying box and an air inlet pipeline, one end of the air inlet pipeline is communicated with the air supply pipeline, the other end of the air inlet pipeline is communicated with the drying box, and the air inlet regulating valve is arranged on the air inlet pipeline;
the communication pipeline is provided with a second heating piece, and the second heating piece is used for heating the gas in the communication pipeline.
2. The single circulation fan hot air drying system of claim 1, wherein the drying unit further comprises:
one end of the air outlet pipeline is communicated with the air exhaust pipeline, and the other end of the air outlet pipeline is communicated with the drying box;
the solvent usage amount in the drying oven close to the outlet of the exhaust pipe is larger than that in the drying oven far away from the outlet of the exhaust pipe.
3. The single circulation fan hot air drying system of claim 1, wherein the drying unit further comprises a first heating element disposed on the air intake duct, the first heating element configured to heat the air in the air intake duct.
4. The single circulation fan hot air drying system according to claim 2, wherein an air outlet regulating valve is arranged on the air outlet pipeline, and the air outlet regulating valve is used for controlling the flow rate of the air entering the exhaust pipeline from the drying box.
5. The single circulation fan hot air drying system according to claim 2, wherein the air supply pipeline is connected with a fresh air pipeline, the fresh air pipeline is provided with a fresh air port, the fresh air pipeline is used for introducing air in the external environment into the air supply pipeline through the fresh air port, and the air supply pipeline is a static pressure box.
6. The single circulation fan hot air drying system of claim 5, further comprising a heat exchanger, one inlet of the heat exchanger being in communication with the exhaust duct, the other inlet of the heat exchanger being in communication with the fresh air duct, the heat exchanger being configured to transfer heat from gas exhausted from the exhaust duct to gas in the fresh air duct.
7. The single cycle fan hot air drying system of claim 5, wherein the fresh air duct has a fresh air regulating valve thereon for regulating the flow rate of air entering the supply duct from the fresh air inlet.
8. The single circulation fan hot air drying system of claim 5, wherein the air outlet duct has a first filter thereon for filtering air entering the air exhaust duct from the air outlet duct;
the fresh air pipeline is provided with a second filtering piece, and the second filtering piece is used for filtering gas entering the fresh air pipeline from the fresh air port.
9. The single circulation fan hot air drying system of claim 1, wherein the exhaust fan and the circulation fan are both variable frequency fans;
the exhaust pipeline is provided with a first pressure sensor which is used for monitoring the air pressure in the exhaust pipeline;
the air inlet pipeline is provided with a temperature sensor, and the temperature sensor is used for detecting the temperature in the air inlet pipeline;
the air inlet pipeline is provided with a second pressure sensor which is used for detecting the air pressure in the air inlet pipeline;
the first pressure sensor, the temperature sensor, the second pressure sensor, the exhaust fan and the circulating fan are all electrically connected with a controller, and the controller is used for controlling the frequencies of the exhaust fan and the circulating fan according to the information of the first pressure sensor, the temperature sensor and the second pressure sensor.
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| CN113243806B (en) * | 2021-06-09 | 2024-10-01 | 安徽中科医疗器械有限公司 | Constant-pressure type operating room hand drying device |
| CN113418382B (en) * | 2021-06-22 | 2022-06-14 | 宁波华热机械制造有限公司 | Control method of energy-saving management dehumidification drying combined machine |
| CN113865361A (en) * | 2021-09-28 | 2021-12-31 | 珠海格力电器股份有限公司 | Drying system |
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