CN205505676U - Take counterflow heat exchanger's high -efficient heat pump drying device - Google Patents

Take counterflow heat exchanger's high -efficient heat pump drying device Download PDF

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Publication number
CN205505676U
CN205505676U CN201620209560.2U CN201620209560U CN205505676U CN 205505676 U CN205505676 U CN 205505676U CN 201620209560 U CN201620209560 U CN 201620209560U CN 205505676 U CN205505676 U CN 205505676U
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air
heat exchanger
counter
condenser
drying
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薛世山
耿世斌
叶海林
周孑民
马骥
诸葛水明
朗润泽
诸葛晓辉
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ZHEJIANG PREAIR ELECTRICAL APPLIANCE INDUSTRY Co Ltd
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ZHEJIANG PREAIR ELECTRICAL APPLIANCE INDUSTRY Co Ltd
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Abstract

The utility model provides a take counterflow heat exchanger's high -efficient heat pump drying device, including drying room and equipment room, be provided with air intake and air outlet between drying room and the equipment room, form a closed circuit air cycle between drying room and the equipment room, be provided with compressor, condenser, choke valve, evaporimeter and counterflow heat exchanger in the equipment room, the circulation canal who forms a confession refrigerant and flowed through is connected in proper order to the pipeline of compressor, condenser, choke valve and evaporimeter, high temperature humid air in the drying room advances from air intake stream in the equipment room, the counterflow heat exchanger's that flows through in proper order after humid air entering equipment room is interior hot air channel, evaporimeter, counterflow heat exchanger's cold air duct, condenser are after drying room is carried back to the air outlet, wherein, the cold air duct with air reverse flow among the hot air channel, counterflow heat exchanger are used for the heat exchange between the high temperature air inlet of low temperature air -out and the evaporimeter of evaporimeter.

Description

A kind of high-efficiency heat pump drying device of band counter-flow heat exchanger
Technical field
This utility model relates to drying device design field, is specifically related to the high-efficiency heat pump drying device of a kind of band counter-flow heat exchanger.
Background technology
The Analysis of Heat Pump Drying System of air closed cycle, such as heat pump clothes dryer, heat pump drying tobacco room, heat pump drying of wood room etc., it is one vapour compression refrigeration system to be arranged on and deposit in the confined space being dried medium, is dried medium (such as air) closed cycle in confined space and is dried the device of operation.
The Analysis of Heat Pump Drying System of air closed cycle, it it is exactly the low-temperature level heat of the low-temperature heat source utilizing compressor to be absorbed at vaporizer by cold-producing medium, it is transported to be in the condenser of high temperature heat source and is released to again be dried medium (such as air), so that being dried the efficient heat power engineering system that temperature rises, relative humidity declines, drying property is recovered, dry run is persistently carried out of medium.
The Analysis of Heat Pump Drying System of air closed cycle, be dried drying and dehydrating ultrahigh in efficiency in early days: put in the Analysis of Heat Pump Drying System to air closed cycle a collection of containing wet stock (such as wet clothes, the damp grain of results, moist Nicotiana tabacum L. plucked etc.) after, Analysis of Heat Pump Drying System brings into operation, in early days owing to being in the constant rate drying period containing wet stock, big with high temperature dry air hot and humid area intensity containing wet stock, moisture evaporation intensity is big, high temperature dry air fast cooling heat release, air humidity strengthens, the humidity load of the vaporizer of heat pump accounting in vaporizer overall refrigerating effect is the biggest, the efficiency of dehydration (being dried) is the highest;
And arrived the middle and late stage of heat pump drying, falling rate drying period is entered containing wet stock, now the surface moisture containing wet stock evaporates the most substantially, material deep layer moisture diffuses to the surface re-evaporation and enters air, diminish with high temperature dry air hot and humid area intensity containing wet stock, moisture evaporation intensity diminishes, to dry air conveying steam ability rapid decrease, high temperature dry air with carry out hot and humid area containing wet stock after cooling extent is less, relative humidity is relatively low.
With reference to Fig. 1: for existing heat pump clothes-drying trial curve figure, transverse axis is the time, the left longitudinal axis corresponds to dry section air themperature, and the right longitudinal axis corresponds to dry section relative air humidity;
During the heat pump clothes-drying of this 120min, the inlet temperature of vaporizer is the most high, progressively rises 58 DEG C from 25 DEG C, and the relative humidity of air intake gradually reduces, being fallen back to 10% by 74% (corresponding to the right longitudinal axis), the dew point temperature of vaporizer air intake swings between 15~23 DEG C;And vaporizer leaving air temp is between 7~15 DEG C.Phase after drying process, the temperature difference of vaporizer air inlet/outlet is up to 58-15=43 DEG C, and dry (dehydration) efficiency now is the lowest.
Therefore, middle and late stage at the heat pump drying of air closed cycle, the sucked air of vaporizer shows the feature of " temperature is high, relative humidity is low ", and the sensible heat that sucked air cooling-down to dew point temperature is released by vaporizer, the accounting in vaporizer overall refrigerating effect is the highest;It is to say, the latent heat that the water vapor condensation in air will be released below sucked air cooling-down to dew point temperature by vaporizer again by aqueous water, the accounting in vaporizer overall refrigerating effect is the lowest by even zero, and the efficiency being now dried (dehydration) is the lowest.
Utility model content
For the problem in background technology, this utility model provides the high-efficiency heat pump drying device of a kind of band counter-flow heat exchanger, including drying room and equipment room, it is provided with air inlet and air outlet between described drying room and described equipment room, between described drying room and described equipment room, forms a closed circuit air circulation;Being provided with compressor, condenser, choke valve, vaporizer and counter-flow heat exchanger in described equipment room, the pipeline of described compressor, condenser, choke valve and vaporizer is linked in sequence and forms a circulation canal supplying cold-producing medium stream process;
High Temperature Moist Air in described drying room flows in described equipment room from described air inlet, after humid air enters in described equipment room, order flows through the hot-air channel of described counter-flow heat exchanger, vaporizer, the cold air duct of described counter-flow heat exchanger, condenser, after be transmitted back to described drying room through described air outlet;Described humid air stream is tentatively lowered the temperature through described hot-air channel, flows through described vaporizer cool-down dehumidification, flows through the heat absorption of described cold air duct and heats up, flows through described condenser and be again warmed up;
Wherein, described hot-air channel and the air reverse flow in described cold air duct, the heat exchange between low temperature air-out and the high temperature air intake of described vaporizer of described vaporizer of the described counter-flow heat exchanger.
It is preferred that described counter-flow heat exchanger uses board-like counter-flow heat exchanger.
It is preferred that be provided with two air inlets between described drying room and described equipment room, the respectively first air inlet and the second air inlet;
The air intake order of described first air inlet flows through the hot-air channel of described counter-flow heat exchanger, vaporizer, the cold air duct of counter-flow heat exchanger, condenser for air, forms the first air and flows through path;
The air intake of described second air inlet be air directly through described condenser, form the second air and flow through path;
Described first air flows through path and the second air flow through the air-out mixing in path after be transmitted back in described drying room.
It is preferred that described condenser includes the first condenser and the second condenser, the refrigerant tubing series connection of described first condenser and the second condenser;
Described first air flows through path and flows through described first condenser, and described second air flows through path and flows through described second condensation.
It is preferred that be additionally provided with the first blower fan in described equipment room, described first blower fan is arranged on the wind outlet of described condenser, is used for pushing the air through described condenser.
It is preferred that be provided with the second blower fan in described equipment room, described second blower fan is arranged on the wind outlet of the cold air duct of described counter-flow heat exchanger, is used for pushing the air through described counter-flow heat exchanger and vaporizer.
It is preferred that described equipment room is arranged on the side of described drying room, described air inlet and described air outlet is arranged at the side of described drying room, and described air outlet is positioned at the bottom of described drying room side.
Preferably, described equipment room is arranged on the bottom of described drying room, described air inlet is arranged on the bottom of described drying room, and described air outlet is arranged on the top of described drying room, and described equipment room connects with described air outlet by being located at the bypass air channel of described equipment room side.
This utility model, owing to using above technical scheme, is allowed to compared with prior art, has the following advantages that and good effect:
1) the high-efficiency heat pump drying device of the band counter-flow heat exchanger that this utility model provides, the heat exchange by arranging counter-flow heat exchanger, between the low temperature air-out and the high temperature air intake of vaporizer of vaporizer;In dry latter stage, the temperature making the high temperature air intake (return air) of vaporizer is reduced to the temperature of the low temperature air-out close to vaporizer through contra-flow heat exchanger, so that the accounting that the latent heat released by aqueous water of water vapor condensation in sucked air is in vaporizer overall refrigerating effect is greatly improved, thus solve heat pump drying device at all and be dried, containing wet stock, the problem that dehydration (being dried) efficiency occurred latter stage seriously reduces, dehumidification rate is greatly improved;
2) the high-efficiency heat pump drying device of the band counter-flow heat exchanger that this utility model provides, use counter-flow heat exchanger, especially with board-like contra-flow heat exchanger, compared to following current, crossflow regenerator, counter-flow heat exchanger heat transfer efficiency is high, have the advantages that unit volume heat exchange area is big, thermic load is big, be suitable to gas-gas heat exchange.
Accompanying drawing explanation
In conjunction with accompanying drawing, by hereafter state detailed description, above-mentioned and other feature and advantage of the present utility model can be more clearly understood that, wherein:
Fig. 1 is existing heat pump clothes-drying trial curve figure;
Fig. 2 is the structural representation of the high-efficiency heat pump drying device of band counter-flow heat exchanger in this utility model embodiment 1;
Fig. 3 is the structural representation of the high-efficiency heat pump drying device of band counter-flow heat exchanger in this utility model embodiment 2.
Detailed description of the invention
See the accompanying drawing illustrating this utility model embodiment, this utility model is described in more detail.But, this utility model can realize in many different forms, and should not be construed as the embodiment by herein proposing and limited.On the contrary, proposing these embodiments is to reach fully and complete disclosure, and makes those skilled in the art understand scope of the present utility model completely.In these accompanying drawings, for clarity sake, may be exaggerated layer and the size in region and relative size.
This utility model provides the high-efficiency heat pump drying device of a kind of band counter-flow heat exchanger, counter-flow heat exchanger is introduced in air closed cycle, utilize the low temperature air-out of vaporizer to reduce the temperature of vaporizer air intake, thus improve vaporizer and filter the humidity load of water vapor in air accounting in vaporizer overall refrigerating effect, improve dehumidification rate.
Concrete, the high-efficiency heat pump drying device of this band counter-flow heat exchanger, include drying room and equipment room, dried object is placed in drying room;It is provided with air inlet and air outlet between drying room and equipment room, between drying room and equipment room, forms a closed circuit air circulation;Being provided with compressor, condenser, choke valve, vaporizer and counter-flow heat exchanger in equipment room, the pipeline of compressor, condenser, choke valve and vaporizer is linked in sequence and forms a circulation canal supplying cold-producing medium stream process.
In dry run, the High Temperature Moist Air produced in drying room flows in equipment room from air inlet;After in humid air access arrangement, first flow through the hot-air channel of counter-flow heat exchanger, carry out heat exchange cooling;Then flow through vaporizer, carry out cool-down dehumidification;Flow through the air after vaporizer and pass through the cold air duct of counter-flow heat exchanger, carry out heat exchange intensification;The air flowed out from the cold air duct of counter-flow heat exchanger flows through condenser, is again warmed up, thus becomes high temperature dry air;High temperature dry air is finally transmitted back in drying room via air outlet, is dried containing wet stock.
Wherein, the hot-air channel of counter-flow heat exchanger and the air reverse flow in cold air duct, it is achieved the heat exchange between low temperature air-out and the high temperature air intake of vaporizer of vaporizer;
Wherein, counter-flow heat exchanger can use board-like counter-flow heat exchanger, certainly may be used without the counter-flow heat exchanger of other forms, is not restricted.
Wherein, each route that air flows through can be realized by arranging of air channel, is not restricted.
Wherein, drying room and the position relationship of equipment room, the arrangement form of internal each parts, all can adjust as the case may be, not be restricted.
Wherein, dried object (containing wet stock) can be the article such as Folium Camelliae sinensis, Nicotiana tabacum L., medicated clothing, grain, is not restricted.
The high-efficiency heat pump drying device of the band counter-flow heat exchanger that this utility model provides, the heat exchange by arranging counter-flow heat exchanger, between the low temperature air-out and the high temperature air intake of vaporizer of vaporizer;In dry latter stage, the temperature making the high temperature air intake (return air) of vaporizer is reduced to the temperature of the low temperature air-out close to vaporizer through contra-flow heat exchanger, so that the accounting that the latent heat released by aqueous water of water vapor condensation in sucked air is in vaporizer overall refrigerating effect is greatly improved, thus solve heat pump drying device at all and be dried, containing wet stock, the problem that dehydration (being dried) efficiency occurred latter stage seriously reduces, improve dehumidification rate.
Meanwhile, using counter-flow heat exchanger in this utility model, compared to following current, crossflow regenerator, counter-flow heat exchanger heat transfer efficiency is the highest, has the advantages that unit volume heat exchange area is big, thermic load is big, is suitable to gas-gas heat exchange.
Concrete, if employing contra-flow heat exchanger, if and the heat exchange area of heat exchanger is sufficiently large, the MAF of two passages of heat exchanger cold fluid and hot fluid is identical, ignore the factor such as heat exchanger, air channel leakage heat, then from the high temperature air intake of drying room passing through temperature T after contra-flow heat exchanger hot-air channel ', close to vaporizer low temperature leaving air temp t;And the low temperature air-out of vaporizer (temperature is t) is passing through temperature t after contra-flow heat exchanger cold air duct ', then close to high temperature inlet temperature T from drying room before contra-flow heat exchanger, heat exchange effect is good;The unit volume heat exchange area of contra-flow heat exchanger is big, and heat exchanger effectiveness is high;
If using following current plate type heat exchanger, and the heat exchange area of heat exchanger is sufficiently large, the MAF of two passages of heat exchanger cold fluid and hot fluid is identical, the inlet temperature of two passages of heat exchanger cold fluid and hot fluid is respectively T, t, ignore the factors such as heat exchanger leakage heat, temperature T after then vaporizer air intake passes through heat exchanger hot-air channel ', can only approximate (T+t) * 1/2;As can be seen here, counter-flow heat exchanger is relative to following current, crossflow regenerator, good effect of heat exchange.
Below in conjunction with preferred embodiment of the present utility model, this utility model is further described.
Embodiment 1
With reference to Fig. 2, this utility model provides the high-efficiency heat pump drying device of a kind of band counter-flow heat exchanger, and including drying room 12 and equipment room 1, equipment room 1 is arranged on the side of drying room 12, and dried object 13 is placed in drying room 12;The side of drying room 12 is provided with the air inlet 11 and air outlet 10 communicated with equipment room 1.The present embodiment just equipment room 1 is arranged on the side of drying room 12, it is simple to the communication of top stream bottom drying room 12.
In the present embodiment, vaporizer 2, counter-flow heat exchanger 4, condenser, compressor 8, blower fan 9 it are provided with in equipment room 1.Concrete, compressor 8, condenser, the pipeline of vaporizer 2 are linked in sequence and form a passage supplying refrigerant cycle, and the refrigerant tubing between vaporizer 2 and condenser is additionally provided with throttling arrangement 5(concretely capillary tube).
In the present embodiment, vaporizer 2, counter-flow heat exchanger 4 and condenser are set in sequence in equipment room 1 from top to bottom;Concrete, air inlet is by the hot-air channel of air channel connection counter-flow heat exchanger 4, hot-air channel connects vaporizer 2 by air channel again, vaporizer 2 is again by the cold air duct of air channel connection counter-flow heat exchanger 4, cold air duct connects condenser by air channel again, and condenser connects air outlet 10 by air channel again;Being provided with blower fan 9 at air outlet 10, blower fan 9 is used for promoting air to circulate.
In the present embodiment, the side of drying room 12 is provided with two air inlets, the respectively first air inlet and the second air inlet;The air intake order of the first air inlet flows through the hot-air channel of counter-flow heat exchanger 4, vaporizer 2, the cold air duct of counter-flow heat exchanger 4, condenser, forms the first air and flows through path;The air intake of the second air inlet, directly through condenser, forms the second air and flows through path;First air flows through path and the second air flow through the air-out mixing in path after be transmitted back in drying room 12.
In the present embodiment, condenser includes the first condenser 6 and the second condenser 7, the refrigerant tubing series connection of the first condenser 6 and the second condenser 7;First air flows through path and flows through the first condenser 6, and the second air flows through path and flows through the second condensation 7.Wherein the first condenser 6 and the second condenser 7 can be provided separately, it is possible to be arranged side by side, do not limit.
This utility model is provided with the first air inlet and the first air flows through path, is to solve the heat exchange of vaporizer low temperature air-out and high temperature air intake and the dehumidifying of air intake;And the second air inlet and the second air flow through path, it is for the ventilation of the area of dissipation and condenser expanding condenser, reduces condensing pressure;First air flows through path and the second air flows through the proportionate relationship between the ventilation of path, the first condenser 6 corresponding on path can be flowed through by the two air and a second condenser 7 fin pitch of fins regulates, such as, reduce the second air and flow through a pitch of fins for the second condenser 7 fin on path, i.e. encrypt fin, it is possible to increase flow resistance and i.e. reduce the ventilation in this path.
Embodiment 2
With reference to Fig. 3, this utility model provides the high-efficiency heat pump drying device of a kind of band counter-flow heat exchanger, and the present embodiment is the amendment carried out on the basis of embodiment 1, and the present embodiment exists following distinguishing feature relative to embodiment 1:
In the present embodiment, equipment room 1 is arranged on the bottom of drying room 12;The bottom of drying room 12 is provided with the air inlet 11 communicated with equipment room 1, and the top of drying room 12 is provided with air outlet 10, and equipment room 1 connects air outlet by being located at the bypass air channel 14 being arranged on drying room 12 side.
In the present embodiment, the first condenser and the second condenser are merged into a complete condenser 16.
In the present embodiment, the first blower fan 15 and the second blower fan 17 it is provided with in equipment room 1;First blower fan 15 is arranged on the wind outlet of condenser 16, is used for pushing the air through condenser 16;Second blower fan 17 is arranged on the wind outlet of the cold air duct of counter-flow heat exchanger 4, for promote air intake air through counter-flow heat exchanger 4 hot-air channel cooling heat release, through the further cool-down dehumidification of vaporizer 2, be then passed through counter-flow heat exchanger 4 cold air duct heat absorption intensification.
Those skilled in the art should be understood that this utility model can be implemented without departing from the spirit or scope of itself with other concrete forms many.Although having been described for case study on implementation of the present utility model, it should be understood that this utility model should not be limited to these embodiments, those skilled in the art can change and modifications as made within spirit and scope of the present utility model that appended claims defines.

Claims (8)

1. the high-efficiency heat pump drying device of a band counter-flow heat exchanger, it is characterized in that, including drying room and equipment room, between described drying room and described equipment room, it is provided with air inlet and air outlet, between described drying room and described equipment room, forms a closed circuit air circulation;Being provided with compressor, condenser, choke valve, vaporizer and counter-flow heat exchanger in described equipment room, the pipeline of described compressor, condenser, choke valve and vaporizer is linked in sequence and forms a circulation canal supplying cold-producing medium stream process;
Flow in described equipment room containing humid air from described air inlet in described drying room, after humid air enters in described equipment room, order flows through the hot-air channel of described counter-flow heat exchanger, vaporizer, the cold air duct of described counter-flow heat exchanger, condenser, after be transmitted back to described drying room through described air outlet;Described humid air stream, through the cooling pre-cooling of described counter-flow heat exchanger hot-air channel, flows through described vaporizer cool-down dehumidification, flows through the heat absorption of described counter-flow heat exchanger cold air duct and heats up, flows through described condenser and be again warmed up;
Wherein, described counter-flow heat exchanger hot-air channel and the air reverse flow in described cold air duct, the heat exchange between low temperature air-out and the high temperature air intake of described vaporizer of described vaporizer of the described counter-flow heat exchanger.
The high-efficiency heat pump drying device of band counter-flow heat exchanger the most according to claim 1, it is characterised in that described counter-flow heat exchanger uses board-like counter-flow heat exchanger.
The high-efficiency heat pump drying device of band counter-flow heat exchanger the most according to claim 1, it is characterised in that be provided with two air inlets, the respectively first air inlet and the second air inlet between described drying room and described equipment room;
The air intake order of described first air inlet flows through the hot-air channel of described counter-flow heat exchanger, vaporizer, the cold air duct of counter-flow heat exchanger, condenser for air, forms the first air and flows through path;
The air intake of described second air inlet be air directly through described condenser, form the second air and flow through path;
Described first air flows through path and the second air flow through the air-out mixing in path after be transmitted back in described drying room.
The high-efficiency heat pump drying device of band counter-flow heat exchanger the most according to claim 3, it is characterised in that described condenser includes the first condenser and the second condenser, the refrigerant tubing series connection of described first condenser and the second condenser;
Described first air flows through path and flows through described first condenser, and described second air flows through path and flows through described second condenser.
The high-efficiency heat pump drying device of band counter-flow heat exchanger the most according to claim 1, it is characterised in that be additionally provided with the first blower fan in described equipment room, described first blower fan is arranged on the wind outlet of described condenser, is used for pushing the air through described condenser.
The high-efficiency heat pump drying device of band counter-flow heat exchanger the most according to claim 1 or 5, it is characterized in that, the second blower fan it is provided with in described equipment room, described second blower fan is arranged on the wind outlet of the cold air duct of described counter-flow heat exchanger, is used for pushing the air through described counter-flow heat exchanger and vaporizer.
The high-efficiency heat pump drying device of band counter-flow heat exchanger the most according to claim 1, it is characterized in that, described equipment room is arranged on the side of described drying room, described air inlet and described air outlet are arranged at the side of described drying room, and described air outlet is positioned at the bottom of described drying room side.
The high-efficiency heat pump drying device of band counter-flow heat exchanger the most according to claim 1, it is characterized in that, described equipment room is arranged on the bottom of described drying room, described air inlet is arranged on the bottom of described drying room, described air outlet is arranged on the top of described drying room, and described equipment room connects with described air outlet by being located at the bypass air channel of described equipment room side.
CN201620209560.2U 2016-03-18 2016-03-18 Take counterflow heat exchanger's high -efficient heat pump drying device Active CN205505676U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105937847A (en) * 2016-03-18 2016-09-14 浙江普林艾尔电器工业有限公司 Efficient heat pump drying device with counterflow heat exchanger
CN110670322A (en) * 2019-09-04 2020-01-10 浙江慧升热能科技有限公司 Clothes dryer and clothes drying method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105937847A (en) * 2016-03-18 2016-09-14 浙江普林艾尔电器工业有限公司 Efficient heat pump drying device with counterflow heat exchanger
CN110670322A (en) * 2019-09-04 2020-01-10 浙江慧升热能科技有限公司 Clothes dryer and clothes drying method thereof

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