CN103438682B - Heat pump drying equipment - Google Patents

Heat pump drying equipment Download PDF

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Publication number
CN103438682B
CN103438682B CN201310321617.9A CN201310321617A CN103438682B CN 103438682 B CN103438682 B CN 103438682B CN 201310321617 A CN201310321617 A CN 201310321617A CN 103438682 B CN103438682 B CN 103438682B
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China
Prior art keywords
heat pump
pump drying
air
drying unit
drying
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CN201310321617.9A
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CN103438682A (en
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祝富华
陈玉景
黄利群
姜平
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NINGBO SKYSEA REFRIGERATION EQUIPMENT CO Ltd
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NINGBO SKYSEA REFRIGERATION EQUIPMENT CO Ltd
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Abstract

The invention discloses heat pump drying equipment, the drying tower comprising heat pump drying unit and be connected with described heat pump drying unit, by heat pump drying unit, the cereal in drying tower is dried, without any pollution in the present invention, thing is arranged outward without any burning, can not cause damage to human body, there is good social benefit; Energy consumption is low, and energy-saving effect is given prominence to, and the investment repayment phase is short, and namely this product Energy Efficiency Ratio inputs the electricity of 1kw between grain harvest general 3-5 in season, can produce the heat of 3-5kw, compared with directly the burn energy or crops, use cost will be saved a lot.

Description

Heat pump drying equipment
Technical field
The present invention relates to agribusiness middle peasant products drying-machine group, concrete, relate to a kind of heat pump drying equipment.
Background technology
At present, the dryer that China and even the whole world mainly adopt mainly contains the method for " fuel oil-air-supply " " burn wood-air-supply " or other directly the burn energy or crops.
The unit of " fuel oil-air-supply " and " burn wood-air-supply " is all fuel type, can increase flue dust, CO, CO 2deng the discharge of pollutant, this is under the condition of current China atmospheric environment severe exacerbation, is worthless when environmental requirement is increasingly important." fuel oil-air-supply " technique mainly does fuel with diesel oil, can strive fuel oil with other industry, not only can increase the weight of the energy supply pressure that yet more can increase the weight of country to the pollution of environment." burn wood-air-supply " technique mainly does fuel with stalk, bavin, rice chaff etc., and the pollution of these fuel to environment is more serious." fuel oil-air-supply " and " burn wood-air-supply " unit is all mineral and biological as fuel, and the costliness of use cost certainly will increase the burden of the vast farmers of China.Moreover the imperfect combustion of fuel must cause again air-polluting to aggravate and the loss of the energy.
Summary of the invention
For the deficiencies in the prior art, the invention provides heat pump drying equipment, solve the environmental pollution existed in prior art serious, the drawback that use cost is high, can dry heat grain efficiently.
The present invention is achieved through the following technical solutions: heat pump drying equipment, the drying tower comprising heat pump drying unit and be connected with described heat pump drying unit, described heat pump drying unit comprises air inlet, described heat pump drying unit comprises air dewetting loop, and described air dewetting loop comprises the compressor be connected successively, cross valve, condenser, device for drying and filtering, first heating power expansion valve, dehumidification heat exchange, and described dehumidification heat exchange connects described cross valve, and described heat pump drying unit also comprises air circulation duct and at least one refrigerant circulation loop, and described refrigerant circulation loop comprises described compressor, described cross valve, described condenser, described device for drying and filtering, second heating power expansion valve and evaporimeter, described compressor, described cross valve, described condenser, described device for drying and filtering, second heating power expansion valve and evaporimeter are connected to form closed circuit successively, described air circulation duct comprises the pipeline be communicated with described air inlet, and described pipeline is communicated with described drying tower by after described dehumidification heat exchange and condenser successively, and described drying tower is positioned at the DC fan being provided with rotation rate-controllable with the connectivity part of described heat pump drying unit.
In technique scheme, bottom described heat pump drying unit, be provided with roller.
In technique scheme, be positioned at described air inlet at described heat pump drying unit and be provided with the first blower fan.
In technique scheme, described heat pump drying unit top is provided with air-ducting ring and the second blower fan.
In technique scheme, in described drying tower, be provided with humidity detector, when described cereal humidity is reduced to setting value, described humidity detector transmits and described compressor is quit work.
In technique scheme, described condenser is finned cooler, and described evaporimeter is finned evaporator.
In technique scheme, described refrigerant circulation loop has two.
1, the present invention has following beneficial effect: environmental protection is good: without any pollution in the present invention, arranges thing outward without any burning, can not cause damage to human body, has good social benefit.
2, energy consumption is low: energy-saving effect is given prominence to, the investment repayment phase is short, and namely this product Energy Efficiency Ratio inputs the electricity of 1kw between grain harvest general 3-5 in season, can produce the heat of 3-5kw, compared with directly the burn energy or crops, use cost will be saved a lot.
3, security performance is good, without any hidden danger: different from other kind grain drying machines, the present invention adopts air-condition principle to heat grain, does not catch fire, the potential safety hazard such as leakage of oil.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the principle schematic of refrigerant circulation loop of the present invention.
Fig. 3 is the structural representation of source pump of the present invention.
Fig. 4 is the structural representation of go-cart in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail: see Fig. 1 to Fig. 3, heat pump drying equipment, the drying tower 2 comprising heat pump drying unit 1 and be connected with described heat pump drying unit 1, described heat pump drying unit comprises air inlet 10, described heat pump drying unit 1 comprises air dewetting loop, and described air dewetting loop comprises the compressor 11 be connected successively, cross valve 12, condenser 13, device for drying and filtering 14, first heating power expansion valve 15, dehumidification heat exchange 16, and described dehumidification heat exchange 16 connects described cross valve 12, and described heat pump drying unit 1 also comprises air circulation duct and at least one refrigerant circulation loop, and described refrigerant circulation loop comprises compressor 11, cross valve 12, condenser 13, device for drying and filtering 14, second heating power expansion valve 150, evaporimeter 160, described compressor 11, cross valve 12, condenser 13, device for drying and filtering 14, second heating power expansion valve 150, evaporimeter 160 is connected to form closed circuit successively, and described air circulation duct comprises the pipeline be communicated with described air inlet 10, and described pipeline is communicated with described drying tower 2 by described dehumidification heat exchange 16 and condenser 13 are rear successively.
Bottom described heat pump drying unit 1, be provided with roller 17, unit can be moved freely.
Be positioned at described air inlet 10 place at described heat pump drying unit 1 and be provided with the first blower fan (accompanying drawing does not show), utilize described first blower fan better surrounding air to be imported heat exchange in dryer.
Described heat pump drying unit 1 top is provided with air-ducting ring 18 and the second blower fan (accompanying drawing does not show), and in refrigerant circulation loop, cold is by the second blower fan, is discharged to air goes from air-ducting ring.
In described drying tower 2, be provided with humidity detector, when described cereal humidity is reduced to setting value, described humidity detector transmits and described compressor is quit work.
Described condenser 13 is finned cooler, and described evaporimeter 160 is finned evaporator.
Described refrigerant circulation loop has two.
Below the concrete principle of the present invention is described in detail: cold-producing medium working medium, under the piston action of compressor, is compressed into low temperature low pressure gas the gas of HTHP; Be cooled into liquid after the gas of HTHP enters condenser thus release amount of heat; Cold air in air circulation duct absorbs its heat thus constantly rises becomes high-temperature hot air; The liquid that cold-producing medium working medium by after condenser, then enters device for drying and filtering, heating power expansion valve, cold-producing medium become low-temp low-pressure enters dehumidification heat exchange, and refrigerant gas flashes to the gas of Room-temperature low-pressure, returns compressor.Cold-producing medium working medium absorbs the heat of air in evaporimeter, and under the mechanism of compressor, the evolution of heat from condenser, changes the heat of hot blast into.Whole source pump uses inverse Carnot cycle principle, working medium is made to produce physical phase transition (liquid-vapor-liquid state) by heat pump acting, utilize in reciprocation cycle phase transition process and uninterruptedly absorb heat and put thermal property, by condenser, air circulation duct is constantly heated, make cold air be warmed up to high-temperature hot air gradually; Owing to effectively utilizing the heat in air, the meeting that the relative traditional combustion of Energy Efficiency Ratio during oven dry is dried is more than 3-5 times.
Surrounding air is entered from Drying unit air inlet by the first blower fan, first through dehumidification heat exchange, water content in extracting air, now surrounding air becomes dry cold air from normal temperature and pressure state, dry cold air at the air being heated into normal temperature through fin condenser, to reach the object of the relative humidity reducing air.The air of dry normal temperature is at the condenser through refrigerant circulation loop, and the heated drying air being heated into 55 DEG C is dried the cereal in drying tower.
And in dry operating mode, now surrounding air is without the need to dehumidifying, therefore closes dehumidification heat exchange, opens evaporimeter and carry out single drying cycle pattern.Contrary in time having a humid climate, open dehumidification heat exchange, close evaporimeter and carry out dehumidifying drying circulation pattern.
Described drying tower 2 is positioned at the DC fan 5 being provided with rotation rate-controllable with the connectivity part of described heat pump drying unit 1, the drying tower stage has just been put at cereal, now cereal moisture content is higher, described DC fan 5 adopts little wind speed (about 2000 rev/min to 2500 rev/min), now give full play to the exsiccation of temperature to cereal, after DC fan 5 maintains little wind speed certain hour, moisture content now in cereal fully enters into circulating air, water content in circulating air raises, now DC fan 5 adopts large wind speed (about 3500 rev/min to 4500 rev/min), utilize the increase of the circulation rate of wind, take rapidly the moisture in drying tower 2 out of, therefore by the effect of DC fan 5, effectively can reduce drying time, increase drying efficiency.
There is the go-cart 3 of loading cereal in described drying tower 2, see Fig. 4, cereal container 4 is rotationally connected by rotating shaft (accompanying drawing does not show) in described go-cart 3, described cereal container 4 comprises two flaring accommodation sections 40, be fixedly connected with by baffle plate 42 between described accommodation section 40, the through hole 43 passed through for cereal is set in baffle plate 42, the top of at least one accommodation section 40 is provided with openable cover plate 41, when cereal is placed, by opening cover plate 41, then pour in described accommodation section 40; Rotating shaft is driven by a drive unit (accompanying drawing does not mark), drive unit is provided with controller, controller makes rotating shaft often cross certain hour and rotates 180 degree, cereal now wherein in an accommodation section 40 just falls into another accommodation section 40 from the through hole 43 of middle baffle plate 42, cereal is heated more even, effectively improves drying efficiency and the quality of cereal.The outer wall of described container is netted, is convenient to effectively contact with the hot-air in environment, is convenient to the conduction of heat.

Claims (7)

1. heat pump drying equipment, the drying tower (2) comprising heat pump drying unit (1) and be connected with described heat pump drying unit (1), described heat pump drying unit (1) comprises air inlet (10), it is characterized in that: described heat pump drying unit (1) comprises air dewetting loop, described air dewetting loop comprises the compressor (11) be connected successively, cross valve (12), condenser (13), device for drying and filtering (14), first heating power expansion valve (15), dehumidification heat exchange (16), and described dehumidification heat exchange (16) connects described cross valve (12), described heat pump drying unit (1) also comprises air circulation duct and at least one refrigerant circulation loop, described refrigerant circulation loop comprises described compressor (11), described cross valve (12), described condenser (13), described device for drying and filtering (14), second heating power expansion valve (150) and evaporimeter (160), described compressor (11), described cross valve (12), described condenser (13), described device for drying and filtering (14), second heating power expansion valve (150) and evaporimeter (160) are connected to form closed circuit successively, described air circulation duct comprises the pipeline be communicated with described air inlet (10), and described pipeline is communicated with described drying tower (2) with condenser (13) afterwards by described dehumidification heat exchange (16) successively, described drying tower (2) is positioned at the DC fan (5) being provided with rotation rate-controllable with the connectivity part of described heat pump drying unit (1), there is the go-cart (3) of loading cereal in described drying tower (2), cereal container (4) is connected by axis of rotation in described go-cart (3), described cereal container (4) comprises two flaring accommodation sections (40), be fixedly connected with by baffle plate (42) between described accommodation section (40), the through hole (43) passed through for cereal is set in baffle plate (42), the top of at least one accommodation section (40) is provided with openable cover plate (41).
2. heat pump drying equipment as claimed in claim 1, is characterized in that: described heat pump drying unit (1) bottom is provided with roller (17).
3. heat pump drying equipment as claimed in claim 1, is characterized in that: be positioned at described air inlet (10) place described heat pump drying unit (1) and be provided with the first blower fan.
4. heat pump drying equipment as claimed in claim 1, is characterized in that: described heat pump drying unit (1) top is provided with air-ducting ring (18) and the second blower fan.
5. heat pump drying equipment as claimed in claim 1, it is characterized in that: in described drying tower (2), be provided with humidity detector, when described cereal humidity is reduced to setting value, described humidity detector transmits and described compressor is quit work.
6. heat pump drying equipment as claimed in claim 1, it is characterized in that: described condenser (13) is finned cooler, described evaporimeter (160) is finned evaporator.
7. heat pump drying equipment as claimed in claim 1, is characterized in that: described refrigerant circulation loop has two.
CN201310321617.9A 2013-07-29 2013-07-29 Heat pump drying equipment Active CN103438682B (en)

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Application Number Priority Date Filing Date Title
CN201310321617.9A CN103438682B (en) 2013-07-29 2013-07-29 Heat pump drying equipment

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CN103438682B true CN103438682B (en) 2015-07-29

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105104522A (en) * 2015-09-09 2015-12-02 宁波天海制冷设备有限公司 Cereal drying machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196526A (en) * 1978-10-26 1980-04-08 CEAF S.p.A. Drying plant, particularly for timber
JPH0448188A (en) * 1990-06-15 1992-02-18 Daikin Ind Ltd Grain drying device
CN1369050A (en) * 1998-12-12 2002-09-11 新加坡国立大学 Modular heat pump system for drying and air-conditioning
CN102331160A (en) * 2011-08-03 2012-01-25 三通(常州)电子科技有限公司 Heat pump industrial drying machine
CN102726956A (en) * 2012-06-15 2012-10-17 林莎莎 Air energy dehumidification file cabinet
CN202973807U (en) * 2012-12-10 2013-06-05 广州九恒新能源有限公司 Rapid baking and dehumidification heat pump unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196526A (en) * 1978-10-26 1980-04-08 CEAF S.p.A. Drying plant, particularly for timber
JPH0448188A (en) * 1990-06-15 1992-02-18 Daikin Ind Ltd Grain drying device
CN1369050A (en) * 1998-12-12 2002-09-11 新加坡国立大学 Modular heat pump system for drying and air-conditioning
CN102331160A (en) * 2011-08-03 2012-01-25 三通(常州)电子科技有限公司 Heat pump industrial drying machine
CN102726956A (en) * 2012-06-15 2012-10-17 林莎莎 Air energy dehumidification file cabinet
CN202973807U (en) * 2012-12-10 2013-06-05 广州九恒新能源有限公司 Rapid baking and dehumidification heat pump unit

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