CN109028666B - Regulate and control accurate grain depot inner loop temperature control pipeline device - Google Patents

Regulate and control accurate grain depot inner loop temperature control pipeline device Download PDF

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Publication number
CN109028666B
CN109028666B CN201810841090.5A CN201810841090A CN109028666B CN 109028666 B CN109028666 B CN 109028666B CN 201810841090 A CN201810841090 A CN 201810841090A CN 109028666 B CN109028666 B CN 109028666B
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China
Prior art keywords
air
water
heat exchanger
electronic expansion
pipeline
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CN201810841090.5A
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CN109028666A (en
Inventor
邢辉
王伟
邢潇朋
庞铭君
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ANHUI KEJIE LIANGBAO STORAGE EQUIPMENT Co.,Ltd.
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Anhui Kejie Liangbao Storage Equipment Co ltd
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Publication of CN109028666A publication Critical patent/CN109028666A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • F25B2600/2513Expansion valves
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention relates to the field of grain depot environmental control, in particular to an accurately regulated and controlled grain depot internal loop temperature control pipeline device which comprises a compressor, a refrigerant pipeline, a refrigerator, a first tee joint, a first electronic expansion valve, a second electronic expansion valve, a water-cooling heat exchanger, an air-cooling heat exchanger, a second tee joint, a water-cooling pipeline, a water pump air duct, an air supply fan, an air temperature and humidity sensor, a ground temperature sensor and a controller.

Description

Regulate and control accurate grain depot inner loop temperature control pipeline device
Technical Field
The invention relates to the field of environmental control of grain depots, in particular to an inner loop temperature control pipeline device for a grain depot, which is accurate in regulation and control.
Background
The grain depot is an important way for national grain guarantee and is also an indispensable link in commercial operation. The grain depot can meet different environmental requirements according to different grain types, but basically all grain depots can consider the problems of temperature rise and moisture caused by grain respiration to cause loss, so the temperature control of the grain depots is very important.
The temperature control of the current grain depot usually adopts ventilation and roof spraying, cannot realize accurate temperature control and cannot realize uniform temperature control of grains.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides an accurate-control grain depot inner loop temperature control pipeline device, which is realized by the following technical scheme:
an accurately regulated and controlled grain depot internal loop temperature control pipeline device comprises a compressor, a refrigerant pipeline, a condenser, a first tee joint, a first electronic expansion valve, a second electronic expansion valve, a water-cooling heat exchanger, an air-cooling heat exchanger, a second tee joint, a water-cooling pipeline, a water pump, an air duct, an air supply fan, an air temperature and humidity sensor, a ground temperature sensor and a controller.
Wherein compressor, condenser, first tee bend, second tee bend, first electronic expansion valve, second electronic expansion valve, water-cooling heat exchanger, air-cooled heat exchanger are connected through the refrigerant pipeline between, and the concrete connection mode is: the high-pressure port of the compressor is connected with the air inlet end of the condenser, the liquid outlet end of the condenser is connected with a first tee joint, the other two ends of the first tee joint are respectively connected to the water-cooling heat exchanger through a first electronic expansion valve and connected to the liquid inlet end of the air-cooling heat exchanger through a second electronic expansion valve, the outlet ends of the water-cooling heat exchanger and the air-cooling heat exchanger are respectively connected to the two ports of the second tee joint, and the other port of the second tee joint is connected to the low-pressure; thus, a structure that one compressor drives two paths of heat exchangers is formed, and the flow proportion of two paths of refrigerants is controlled by two electronic expansion valves.
One water inlet and outlet port of the water-cooled heat exchanger is connected to one end of a water pump through a water-cooled pipeline, the other end of the water pump is connected to the other water inlet and outlet port of the water-cooled heat exchanger through a water-cooled pipeline, and the water-cooled pipeline is partially embedded in the floor of the grain depot; the water cooling pipeline is arranged to cool the floor of the grain depot and cool grains from the lower part.
The air-cooled heat exchanger is arranged in an air duct, and the tail end of the air duct is connected with an air supply fan; the air-cooled heat exchanger cools the air, and the air is sent out to the grain depot space by the air supply fan.
The air temperature and humidity sensor is arranged on the roof of the grain depot, and the ground temperature sensor is arranged on the ground of the grain depot; the air temperature above the grains and the temperature at the bottom of the grains can be obtained, so that the targeted cooling is carried out.
The first electronic expansion valve, the second electronic expansion valve, the air supply fan, the compressor and the condenser are respectively connected to the output end of the controller, and the air temperature and humidity sensor and the ground temperature sensor are respectively connected to the signal input end of the controller. Judging the temperature and the humidity by a controller so as to determine and control the opening degrees of the two electronic expansion valves; when the temperature is not required to be reduced, the compressor can be controlled to stop, and the condenser fan stops rotating.
The grain depot further comprises a three-way valve, an outdoor filter screen and an indoor filter screen, wherein the three-way valve is provided with A, B, C three ports and can be communicated with an AB end or an AC end, the A end is connected to the air supply fan through an air duct, the air cooling heat exchanger is arranged between the three-way valve and the air supply fan, the C end is connected to the outdoor filter screen of the grain depot, and the B end is connected to the indoor filter screen of the grain depot. When needing to take a breath, can let outdoor gas get into the grain depot through the conversion of three-way valve, ensure the cleanness of air simultaneously, the filtration of dust.
The further improvement is that the water cooling pipeline is a metal pipeline, has higher heat conductivity and can quickly cool grains.
The invention has the beneficial effects that: the temperature of the grain depot is monitored by the air temperature and humidity sensor and the ground temperature sensor, and the two electronic expansion valves are controlled to respectively adjust the air temperature and the ground temperature, so that the temperature of the grain depot is controlled more accurately and more energy is saved.
Drawings
FIG. 1 is an overall structural view of an embodiment of the present invention;
FIG. 2 is a diagram illustrating the connection relationship of the control circuit according to the embodiment of the present invention;
the system comprises a compressor 1, a condenser 2, a first tee joint 3, a first electronic expansion valve 41, a second electronic expansion valve 42, a second tee joint 5, a water-cooled heat exchanger 6, a water-cooled pipeline 7, an air-cooled heat exchanger 8, a refrigerant pipeline 9, a water pump 10, an air duct 11, a blower fan 12, a three-way valve 13, an indoor filter screen 14, an outdoor filter screen 15, a grain depot 16, an air temperature and humidity sensor 17, and a ground temperature sensor 18
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
As shown in fig. 1-2, a grain depot inner loop temperature control pipeline device with precise regulation and control comprises a compressor 1, a refrigerant pipeline 9, a condenser 2, a first tee joint 3, a first electronic expansion valve 41, a second electronic expansion valve 42, a water-cooling heat exchanger 6, an air-cooling heat exchanger 8, a second tee joint 5, a water-cooling pipeline 7, a water pump 10, an air duct 11, an air supply fan 12, an air temperature and humidity sensor 17, a ground temperature sensor 18 and a controller.
Wherein the compressor 1, the condenser 2, the first tee joint 3, the second tee joint 5, the first electronic expansion valve 41, the second electronic expansion valve 42, the water-cooling heat exchanger 6 and the air-cooling heat exchanger 8 are connected through a refrigerant pipeline 9, and the specific connection mode is as follows: the high-pressure port of the compressor 1 is connected with the air inlet end of the condenser 2, the liquid outlet end of the condenser 2 is connected with the first tee joint 3, the other two ends of the first tee joint 3 are respectively connected to the water-cooling heat exchanger 6 through the first electronic expansion valve 41, and are connected to the liquid inlet end of the air-cooling heat exchanger 8 through the second electronic expansion valve 42, the outlet ends of the water-cooling heat exchanger 6 and the air-cooling heat exchanger 8 are respectively connected to the two ports of the second tee joint 5, and the other port of the second tee joint 5 is connected to the low-; thus, a structure that one compressor drives two paths of heat exchangers is formed, and the flow proportion of two paths of refrigerants is controlled by two electronic expansion valves.
One water inlet and outlet port of the water-cooled heat exchanger 6 is connected to one end of a water pump 10 through a water-cooled pipeline 7, the other end of the water pump 10 is connected to the other water inlet and outlet port of the water-cooled heat exchanger 6 through the water-cooled pipeline 7, wherein the water-cooled pipeline 7 is partially buried in the floor of the grain depot; the water cooling pipeline 7 is arranged to cool the floor of the grain depot and cool grains from the lower part, and the water cooling pipeline 7 is a metal pipeline and has high heat conduction performance.
The air-cooled heat exchanger 8 is arranged in an air duct 11, and the tail end of the air duct 11 is connected with an air supply fan 12; the air cooling heat exchanger 8 cools the air and sends the air into the grain depot space by the air supply fan 12.
Still include three-way valve 13, outdoor filter screen 15, indoor filter screen 14, the three-way valve has A, B, C three ports, can communicate AB end or AC end, the A end is connected to air supply fan 12 through wind channel 11, air-cooled heat exchanger 8 is located between three-way valve 13 and air supply fan 12, the C end is connected to the outdoor filter screen 15 in the granary, the B end is connected to indoor filter screen 14 in the granary. When ventilation is needed, outdoor air can enter the grain depot 16 through the switching of the three-way valve 13, and meanwhile, the cleanness of air and the filtration of dust are ensured.
The air temperature and humidity sensor 17 is arranged on the roof of the grain depot, and the ground temperature sensor 18 is arranged on the ground of the grain depot; the air temperature above the grains and the temperature at the bottom of the grains can be obtained, so that the targeted cooling is carried out.
The first electronic expansion valve 41, the second electronic expansion valve 42, the compressor 1 and the condenser 2 are respectively connected to the output end of the controller, and the air temperature and humidity sensor 17 and the ground temperature sensor 18 are respectively connected to the signal input end of the controller. Judging the temperature and the humidity by a controller so as to determine and control the opening degrees of the two electronic expansion valves; when the temperature is not required to be reduced, the compressor 1 can be controlled to stop, and the fan of the condenser 2 stops rotating.
The specific control mode of the controller is as follows: the controller obtains the air temperature and humidity from the air temperature and humidity sensor 17, obtains the ground temperature from the ground temperature sensor 18, and enters the working mode according to the data:
1. an air supply mode: under the condition that the temperature and the humidity reach the standard, the air supply mode is started, the controller controls the air supply fan 12 to work at a constant speed, and the compressor 1 and the condenser 2 stop working;
2. and (3) equalizing refrigeration mode: under the condition that the humidity reaches the standard, the temperature is higher than the set value, the air supply fan enters a refrigeration mode, the air supply fan 12 is controlled to run at a constant speed, and the first electronic expansion valve 41 and the second electronic expansion valve 42 are opened to preset opening degrees; the compressor 1 and the condenser 2 work normally;
3. non-equilibrium refrigeration mode: under the condition that the humidity reaches the standard, only if the air temperature is higher than a set value, an air cooling mode is entered, the air supply fan 12 is controlled to operate at a constant speed, the second electronic expansion valve 42 is opened to a preset opening degree, the opening degree of the first electronic expansion valve 41 is reduced, and the compressor 1 and the condenser 2 work normally; under the condition that the humidity reaches the standard, only the ground temperature is higher than a set value, a ground refrigeration mode is entered, the air supply fan 12 is controlled to run at a constant speed, the first electronic expansion valve 41 is opened to a preset opening degree, the opening degree of the second electronic expansion valve 42 is reduced, and the compressor 1 and the condenser 2 work normally; through non-equilibrium refrigeration, the grain cooling can be performed with targeted action, so as to achieve accurate regulation and control;
4. a dehumidification mode: when the humidity is higher than the preset value, the dehumidification mode is entered, the air supply fan 12 is controlled to operate at a speed lower than the normal speed, the second electronic expansion valve 42 is opened to a preset opening degree, the opening degree of the first electronic expansion valve 41 is reduced, and the compressor 1 and the condenser 2 work normally.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. The utility model provides an accurate grain depot inner loop temperature control pipe device of regulation and control which characterized in that: the air conditioner comprises a compressor (1), a refrigerant pipeline (9), a condenser (2), a first tee joint (3), a first electronic expansion valve (41), a second electronic expansion valve (42), a water-cooling heat exchanger (6), an air-cooling heat exchanger (8), a second tee joint (5), a water-cooling pipeline (7), a water pump (10), an air duct (11), an air supply fan (12), an air temperature and humidity sensor (17), a ground temperature sensor (18) and a controller;
wherein the compressor (1), the condenser (2), the first tee joint (3), the second tee joint (5), the first electronic expansion valve (41), the second electronic expansion valve (42), the water-cooling heat exchanger (6) and the air-cooling heat exchanger (8) are connected through a refrigerant pipeline (9), and the concrete connection mode is as follows: the high-pressure port of the compressor (1) is connected with the air inlet end of the condenser (2), the liquid outlet end of the condenser (2) is connected with the first tee joint (3), the other two ends of the first tee joint (3) are respectively connected to the water-cooling heat exchanger (6) through the first electronic expansion valve (41), and are connected to the liquid inlet end of the air-cooling heat exchanger (8) through the second electronic expansion valve (42), the outlet ends of the water-cooling heat exchanger (6) and the air-cooling heat exchanger (8) are respectively connected to the two ports of the second tee joint (5), and the other port of the second tee joint (5) is connected to the low-pressure port of the compressor;
one water inlet and outlet port of the water-cooled heat exchanger (6) is connected to one end of a water pump (10) through a water-cooled pipeline (7), the other end of the water pump (10) is connected to the other water inlet and outlet port of the water-cooled heat exchanger (6) through the water-cooled pipeline (7), and part of the water-cooled pipeline (7) is embedded in the floor of the grain depot;
wherein the air-cooled heat exchanger (8) is arranged in the air duct (11), and the tail end of the air duct (11) is connected with the air supply fan (12);
the air temperature and humidity sensor (17) is arranged on the roof of the grain depot, and the ground temperature sensor (18) is arranged on the ground of the grain depot;
the first electronic expansion valve (41), the second electronic expansion valve (42), the air supply fan (12), the compressor (1) and the condenser (2) are respectively connected to the output end of the controller, and the air temperature and humidity sensor (17) and the ground temperature sensor (18) are respectively connected to the signal input end of the controller.
2. The accurate-regulation and control grain depot inner loop temperature control pipeline device according to claim 1, characterized in that: still include three-way valve (13), outdoor filter screen (15), indoor filter screen (14), the three-way valve has A, B, C three ports, can communicate AB end or AC end, the A end is connected to air supply fan (12) through wind channel (11), air-cooled heat exchanger (8) are located between three-way valve (13) and air supply fan (12), the C end is connected to outdoor filter screen (15) in the grain depot, the B end is connected to indoor filter screen (14) in the grain depot.
3. The accurate-regulation and control grain depot inner loop temperature control pipeline device according to claim 1, characterized in that: the water cooling pipeline (7) is a metal pipeline.
CN201810841090.5A 2018-07-27 2018-07-27 Regulate and control accurate grain depot inner loop temperature control pipeline device Active CN109028666B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810841090.5A CN109028666B (en) 2018-07-27 2018-07-27 Regulate and control accurate grain depot inner loop temperature control pipeline device

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Application Number Priority Date Filing Date Title
CN201810841090.5A CN109028666B (en) 2018-07-27 2018-07-27 Regulate and control accurate grain depot inner loop temperature control pipeline device

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CN109028666B true CN109028666B (en) 2021-02-12

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CN112594984A (en) * 2020-12-11 2021-04-02 四川长虹空调有限公司 Low-temperature grain depot air conditioner humidity control system and method

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CN202941179U (en) * 2012-12-14 2013-05-22 成都朗博旺科技发展有限公司 Grain storage device for integrating whole bin temperature reduction with old bin drying
CN107490231A (en) * 2017-08-22 2017-12-19 珠海格力电器股份有限公司 Heat pump and its control method, freezer
CN107896650B (en) * 2017-11-16 2018-08-28 谷晓辰 A kind of grain storage freezer and storing grain method
CN207527887U (en) * 2017-12-03 2018-06-22 谢峤 Multiple-energy-source and the grain depot grain heap environmental control system of the cold and hot bidirectional couple of heat pump

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Effective date of registration: 20201230

Address after: 236500 Industrial Park, Fuyang City, Anhui

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