CN106855353A - Heat pump drying equipment and drying means with dehumidification type Yu hydrofuge type handoff functionality - Google Patents
Heat pump drying equipment and drying means with dehumidification type Yu hydrofuge type handoff functionality Download PDFInfo
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- CN106855353A CN106855353A CN201710208014.6A CN201710208014A CN106855353A CN 106855353 A CN106855353 A CN 106855353A CN 201710208014 A CN201710208014 A CN 201710208014A CN 106855353 A CN106855353 A CN 106855353A
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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
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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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
-
- 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
- F26B21/08—Humidity
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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
- F26B21/10—Temperature; Pressure
-
- 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
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Combustion & Propulsion (AREA)
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- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of heat pump drying equipment with dehumidification type and hydrofuge type handoff functionality and dry materials method, including heat pump and drying workshop, drying is provided with heat pump machine hall, return airway and drying chamber in workshop；Return airway top is higher than drying chamber, and drying chamber right side is provided with the air outlet being connected with return airway；Hydrofuge air channel is provided with return airway, the other end in hydrofuge air channel stretches into heat pump machine hall；Interior circulation air door is provided between exhaust air box and heat pump machine hall, exhaust air box side wall is provided with air draft air door；Fresh air duct is provided with heat pump machine hall, fresh air duct is provided with heat regenerator with the intersection in hydrofuge air channel, and fresh air duct is provided with interior fresh air air door.Heat pump drying equipment compact conformation with dehumidification type Yu hydrofuge type handoff functionality of the invention, coordinates drying means, can as the case may be select optimized operation pattern, comprehensive each pattern is had the advantage that, the influence of the shortcoming of each pattern is reduced by pattern switching, energy consumption is low, and drying efficiency is high.
Description
Technical field
The present invention relates to a kind of heat pump drying equipment, special equipment when agricultural byproducts etc. are dehydrated is particularly suitable for
And drying means.
Background technology
At present, heat pump drying equipment has vast potential for future development, particularly drying temperature at 75 DEG C in drying device field
Following drying field.As country increasingly payes attention to aspects such as energy saving, environmental protection, the application of heat pump drying equipment
Increasingly it is valued by people.
Heat pump drying equipment is the special equipment of dry materials, and heat pump provides heat supply for drying equipment, warp
The air-flow feeding drying chamber crossed after heating up, the air-flow of high temperature drying takes away the steam in material, so as to reach dry purpose.
When using circulated air, as high temperature gas flow constantly takes away steam, the gradually reduction of the temperature of air-flow, humidity increases, to material
Water separation capability gradually reduce；The Hot wet air heating in a part of baking room is discharged after airflow humidity reaches setting humidity target,
The dry air in environment is introduced into simultaneously, proceeds to dehydrate process.
Current heat pump drying equipment is broadly divided into two kinds, i.e. hot air dehumidifying type and evaporator dehumidification type.Hot air dehumidifying type heat
Pump drying plant is to utilize to discharge Hot wet air heating, introduces extraneous dry air to reach drying purpose.
Evaporator dehumidification type drying plant is, using the cold of evaporator, below hydrofuge wind treatment to dew-point temperature, to coagulate
Condensed water is born to reach the purpose of dried material.
The drying plant of above two type has features, and advantage and disadvantage are also apparent from.Hot air dehumidifying form is by the external world
The state influence of cold air is larger, and the external world is compared with cold ageing rate than relatively low；Evaporator dehumidification type is influenceed larger by material characteristic, works as thing
After material is half-dried, moisture is less in drying air-flow, and evaporator dehumidifying efficiency is very low.
At present, in the market lacks one kind and can maximize favourable factors and minimize unfavourable ones, and integrates the heat pump drying of two kinds of drying plant
Equipment.
The content of the invention
Can be dried in evaporator dehumidification type drying plant and hot air dehumidifying type heat pump it is an object of the invention to provide one kind
The heat pump drying equipment switched between dry equipment.
To achieve the above object, the heat pump drying equipment with dehumidification type and hydrofuge type handoff functionality of the invention includes heat
Pumping system and drying workshop, drying are sequentially provided with heat pump machine hall, return airway and for holding material from left to right in workshop
Drying chamber；Return airway top is higher than drying chamber and extends to the right, and drying chamber right side is provided with air outlet, air outlet and return air wind
Road is connected；
Heat pump machine hall bottom side is provided with heat pump machine hall air door, and heat pump machine hall has connected up exhaust air box；Return airway
Interior to be provided with hydrofuge air channel in tip position, the other end in hydrofuge air channel stretches into exhaust air box and extends downwardly into heat pump machine hall bottom；
Heat pump includes being circulated by refrigerant line compressor, condenser, throttling arrangement and the evaporator of connection, compression
Machine, throttling arrangement and evaporator composition heat pump main frame, heat pump main frame are located in heat pump machine hall, are set at the top of the heat pump main frame
There is the thermo-compression evaporation blower fan that air-out direction is upward；Evaporator is adjacent with the lower ending opening in hydrofuge air channel；Condenser is located at return air wind
Between the bottom and drying workshop in road；The hydrofuge air channel is interval with two, is set respectively at the right-end openings in each hydrofuge air channel
There is wet-emitting blower；
Interior circulation air door is provided between exhaust air box and heat pump machine hall, exhaust air box side wall is provided with air draft air door；
Fresh air duct is provided with the heat pump machine hall, the two ends of fresh air duct are opened on heat pump machine hall two lateral walls respectively
On, fresh air duct is respectively arranged at two ends with outdoor fresh air air door；Fresh air duct and each hydrofuge air channel in cross-shaped,
Fresh air duct is equipped with heat regenerator, the shell side or tube side and fresh air duct of each heat regenerator with the intersection in each hydrofuge air channel
It is connected, the tube side or shell side of each heat regenerator are connected with hydrofuge air channel；
Fresh air duct between two hydrofuge air channels is provided with drying chamber fresh air air door, drying chamber fresh air air door be located at fresh air duct and
Between return airway；
Air-out direction circulating fan directed downwardly is provided with return airway below fresh air duct, circulating fan is located at the upper of condenser
Side；
To point to the direction of drying chamber fresh air air door as introversive, interior fresh air is respectively equipped with the fresh air duct on the outside of two hydrofuge air channels
Air door, interior fresh air air door is located between fresh air duct and return airway.
The heat pump machine hall air door spacing side by side is provided with two or more；Opposite sides of the air draft air door in exhaust air box
Two are arranged with wall.
Humidity sensor and temperature sensor are provided with the return airway.
The present invention also aims to provide a kind of drying means using above-mentioned heat pump drying equipment material drying.
To achieve the above object, it is of the invention to be set with the heat pump drying of hydrofuge type handoff functionality with dehumidification type using above-mentioned
The standby method for carrying out dry materials is carried out according to the following steps successively：
First step is run by simple mode；Open heat pump machine hall air door, interior circulation air door, air draft air door, thermo-compression evaporation
Blower fan, compressor and circulating fan, close wet-emitting blower, interior fresh air air door, drying chamber fresh air air door and outdoor fresh air air door；
Now, under the draft effect of thermo-compression evaporation blower fan, outdoor air by heat pump machine hall air door enter heat pump machine hall with
Evaporator heat exchange, the cold that evaporator is produced is discharged by interior circulation air door and air draft air door；In the presence of circulating fan,
Circulated air passes downwardly through condenser and enters drying chamber, and circulated air is heated when by condenser, and the circulated air after heating exists
Drying functions are produced to material in drying chamber；The water vapour produced during drying materials is taken away by circulated air, and circulated air is passed through back
Wind air channel is returned at circulating fan, so as to the continuous material drying in cyclic process；
In the running of simple mode, when material is persistently dried, the water vapour of generation constantly enters in circulated air；Circulated air
Relative humidity it is higher, drying effect is lower；When the relative humidity in return airway is higher than the first switching humidity, second is transferred to
Step is evaporator dehumidification mode；The first switching humidity is more than 50% and less than or equal to 80%, by staff according to operation
Operating mode determines occurrence；
Interior circulation air door and air draft air door are closed, interior fresh air air door and wet-emitting blower is opened, into second step；
Second step is run by evaporator dehumidification mode；Now, in the presence of wet-emitting blower, the part in return airway
Return air enters hydrofuge air channel, and another part return air is then still directly back at circulating fan；Into the circulated air in hydrofuge air channel
Heat pump machine hall is entered by the lower ending opening in hydrofuge air channel after heat regenerator, by being sent by thermo-compression evaporation blower fan after evaporator
To the top of heat pump machine hall, and enter fresh air duct through interior fresh air air door, return air is then entered by drying chamber fresh air air door
Air channel, and is introduced into being admitted to drying chamber through circulating fan and condenser after the circulated air in hydrofuge air channel converges, and circulated air is cold
Heated at condenser, and drying functions are produced to the material in drying chamber；Air outlet on the right side of circulated air drying room is again
Into return airway, circulation is formed；
When the relative humidity in return airway is less than the second switching humidity, hot air dehumidifying drying pattern is transferred to；Second switching is wet
Degree determines occurrence by staff more than or equal to 10 and less than or equal to 50% according to operating condition；
Outdoor fresh air air door, interior circulation air door and air draft air door are opened, interior fresh air air door is closed, into third step；
Third step is to dry mode operation by hot air dehumidifying；Now, in the presence of wet-emitting blower, one in return airway
Return air is divided to enter hydrofuge air channel as hydrofuge wind, another part return air is then still directly back at circulating fan；In circulated air
Under the swabbing action of machine, outdoor fresh air enters fresh air duct by outdoor fresh air air door, enters with hydrofuge wind when by heat regenerator
Row heat exchange, return airway is entered after the heat in hydrofuge wind is absorbed through drying chamber fresh air air door, and is introduced into hydrofuge wind
The circulated air in road is admitted to drying chamber after converging through circulating fan and condenser, and the wind after converging is heated at condenser,
And drying functions are produced to the material in drying chamber；Air outlet on the right side of air-flow drying room reenters return airway, so that
Continuously run；
During the continuous service of third step, for evaporator provides heat when hot wet gas current in hydrofuge air channel is by evaporator
Amount, realizes Waste Heat Reuse；In the presence of thermo-compression evaporation blower fan, at the air-flow and heat pump machine hall air door in hydrofuge air channel
Outdoor air is inhaled into heat pump machine hall, is discharged by interior circulation air door and air draft air door after taking away the cold produced by evaporator；
When the relative humidity in return airway is higher than the first switching humidity, second step i.e. evaporator dehumidification mode is transferred to；
Four steps be drying materials degree it is up to standard after, the compressor of each blower fan, each air door and heat pump is closed, by material
Drying chamber is transported, stops dry materials process.
The present invention devises a kind of heat pump drying equipment with dehumidification type with hydrofuge type handoff functionality and corresponding drying
Method, mutually being changed using air door can realize the two kinds of mutual switchings of drying type of hot air dehumidifying type and evaporator dehumidification type,
Suitable drying pattern is selected in different drying demands, with reference to two kinds of advantages of drying pattern, drying efficiency is improved, is reduced and is dried
Dry cost.
Simple mode has simple to operate, hot-air temperature rise advantage faster（Because both not in drying under simple mode
Indoor introducing fresh air, and circulated air is lowered the temperature by evaporator, therefore temperature rise is very fast）.The shortcoming of this pattern is heat pump
System is influenceed larger by ambient temperature, and when outside air temperature is relatively low, temperature is very low at evaporator, so as to reduce heat pump
The operational efficiency of system.
The advantage of evaporator dehumidification mode is that heat pump is influenceed very little by environment temperature, is suitable for low temperature environment.
Under the pattern, temperature hydrofuge wind higher（Air-flow in hydrofuge air channel）For heating evaporation device, greatly improve at evaporator
Temperature regime, improve evaporating pressure, improve the operational efficiency of heat pump.Because the temperature at evaporator is not received substantially
The influence of outside air temperature, therefore evaporator dehumidification mode has the advantages that heat pump system efficiency is high, low degree affected by environment.Steam
Sending out the shortcoming of device dehumidification mode is, when hydrofuge rheumatism degree is smaller, because hydrofuge wind dew-point temperature is relatively low, by heat regenerator and
May be still reached to after evaporator less than below dew-point temperature, or just reach dew-point temperature, condensed when now by evaporator
Seldom, hydrofuge wind is turned again in drying chamber the moisture for going out, and does not have the effect for reducing drying indoor air humidity（Or effect
Very little）, and it is again invalidation process by the process of heater intensification that hydrofuge wind is lowered the temperature by evaporator, not only effect on moisture extraction is failed to understand
Aobvious and consumption mass energy.
The advantage of hot air dehumidifying drying pattern is accelerated with the psychrometric difference of humid air in drying chamber using extraneous dry air
Drying course, high in outside air temperature, drying efficiency is high under conditions of humidity is small, and energy consumption is small.Meanwhile, in this pattern, hydrofuge
The used heat having in wind have passed through two-stage recycling, and Waste Heat Reuse rate is higher.First order Waste Heat Reuse is in heat regenerator
In, hydrofuge wind heated the outdoor fresh air passed through in fresh air duct；Second level Waste Heat Reuse is when hydrofuge wind passes through evaporator
Evaporator is heated, the operational efficiency of heat pump is improve（Higher than simple mode and less than evaporator dehumidification mode）, make heat
Pumping system is influenced by ambient temperature smaller compared with simple mode.
Hot air dehumidifying drying pattern shortcoming be when outside air with drying indoor air humidity difference it is less when, it is necessary to
A large amount of discharge hot blasts, waste the energy, and drying efficiency is low；When ambient temperature is low, fresh air is larger with Air Temperature Difference in barn,
Fresh air thermic load is larger.
Heat pump drying equipment compact conformation with dehumidification type Yu hydrofuge type handoff functionality of the invention, coordinates of the invention
Drying means, can realize multiple-working mode, can select optimal operational mode, comprehensive utilization according to carrying out practically situation
Each pattern is had the advantage that the influence of the shortcoming of each pattern is reduced by pattern switching, and overall energy consumption is relatively low, drying efficiency compared with
It is high.
Brief description of the drawings
Fig. 1 is structural representation of the invention under simple mode；
Fig. 2 is that the right side of Fig. 1 regards schematic diagram；
Fig. 3 is the schematic top plan view of Fig. 1；
Fig. 4 is structural representation of the invention under evaporator dehumidification mode；
Fig. 5 is that the right side of Fig. 4 regards schematic diagram；
Fig. 6 is the schematic top plan view of Fig. 4；
Fig. 7 is structural representation of the invention under hot air dehumidifying drying pattern；
Fig. 8 is that the right side of Fig. 7 regards schematic diagram；
Fig. 9 is the schematic top plan view of Fig. 7.
Specific embodiment
Direction shown in arrow is the airflow direction at this in each view.
As shown in Figures 1 to 9, the heat pump drying equipment with dehumidification type and hydrofuge type handoff functionality of the invention includes heat
Pumping system and drying workshop 1, drying are sequentially provided with heat pump machine hall 3, return airway 12 and for holding from left to right in workshop 1
The drying chamber 9 of material；The top of return airway 12 is higher than drying chamber 9 and extends to the right, and the right side of drying chamber 9 is provided with air outlet, air-out
Mouth is connected with return airway 12；
The bottom side of heat pump machine hall 3 is provided with heat pump machine hall air door 16, and heat pump machine hall 3 has connected up exhaust air box 31；Return
Hydrofuge air channel 14 is provided with tip position in wind air channel 12, the other end in hydrofuge air channel 14 stretches into exhaust air box 31 and extends downwardly into heat
The bottom of pump machine hall 3；
Heat pump includes passing through refrigerant line 7（It is preferred that copper pipe）Circulate connection compressor, condenser 8, throttling arrangement and
Evaporator 5, compressor, throttling arrangement and evaporator 5 composition heat pump main frame, heat pump main frame is located in heat pump machine hall 3, the heat
The upward thermo-compression evaporation blower fan 2 of air-out direction is provided with the top of pump main frame；The lower ending opening phase in evaporator 5 and hydrofuge air channel 14
It is adjacent；Condenser 8 is located between the bottom of return airway 12 and drying workshop 1；The hydrofuge air channel 14 is interval with two, each row
Wet-emitting blower 13 is respectively equipped with the right-end openings in wet wind road 14；
Interior circulation air door 17 is provided between exhaust air box 31 and heat pump machine hall 3, the side wall of exhaust air box 31 is provided with air draft air door 18；
It is provided with fresh air duct 22 in the heat pump machine hall, it is relative that the two ends of fresh air duct 22 are opened on heat pump machine hall 3 respectively
On two side, fresh air duct 22 is respectively arranged at two ends with outdoor fresh air air door 21；Fresh air duct 22 and each hydrofuge air channel 14
It is in cross-shaped, fresh air duct 22 is equipped with heat regenerator 15, each heat regenerator with the intersection in each hydrofuge air channel 14
15 shell side or tube side is connected with fresh air duct 22, and the tube side or shell side of each heat regenerator 15 are connected with hydrofuge air channel 14；
Fresh air duct 22 between two hydrofuge air channels 14 is provided with drying chamber fresh air air door 20, and drying chamber fresh air air door 20 is located at new
Between wind air channel 22 and return airway 12；
Air-out direction circulating fan 6 directed downwardly is provided with the return airway 12 of the lower section of fresh air duct 22, circulating fan 6 is located at condensation
The top of device 8；
To point to the direction of drying chamber fresh air air door 20 as introversive, it is respectively equipped with the fresh air duct 22 in the outside of two hydrofuge air channel 14
Interior fresh air air door 19, interior fresh air air door 19 is located between fresh air duct 22 and return airway 12.
Wherein, heat pump is this area routine techniques, not shown compressor and throttling arrangement.Throttling arrangement can be used
Capillary or expansion valve, are this area routine techniques.
The spacing side by side of heat pump machine hall air door 16 is provided with two or more；Phase of the air draft air door 18 in exhaust air box 31
To being arranged with two on two side.
Humidity sensor and temperature sensor are provided with the return airway 12.Humidity sensor and temperature sensor are
Conventional equipment, it is not shown.
During work, material 11 to be dried is contained in material loading attachment 10 and sends into drying chamber 9.
Thing is carried out the invention also discloses using the above-mentioned heat pump drying equipment with dehumidification type and hydrofuge type handoff functionality
Expect dry method, carry out according to the following steps successively：
First step is run by simple mode；Open heat pump machine hall air door 16, interior circulation air door 17, air draft air door 18, heat
Pump evaporation fan 2, the compressor of heat pump main frame and circulating fan 6, close wet-emitting blower 13, interior fresh air air door 19, drying chamber new
Wind air door 20 and outdoor fresh air air door 21；
Now, under the draft effect of thermo-compression evaporation blower fan 2, outdoor air enters heat pump machine hall by heat pump machine hall air door 16
3 are exchanged heat with evaporator 5, and the cold that evaporator 5 is produced is discharged by interior circulation air door 17 and air draft air door 18；In circulating fan
In the presence of 6, circulated air passes downwardly through condenser 8 and enters drying chamber 9, and circulated air is heated when by condenser 8, heating
Circulated air afterwards produces drying functions in drying chamber 9 to material；The water vapour produced during drying materials is by circulated air band
Walk, circulated air is returned at circulating fan 6 through return airway 12, so as to the continuous material drying in cyclic process；
In the running of simple mode, when material is persistently dried, the water vapour of generation constantly enters in circulated air；Circulated air
Relative humidity it is higher, drying effect is lower；When the relative humidity in return airway 12 is higher than the first switching humidity, the is transferred to
Two steps are the dehumidification mode of evaporator 5；The first switching humidity is more than 50% and less than or equal to 80%, by staff according to fortune
Row operating mode determines occurrence；When drying certain material, the situation of change of the relative humidity of staff's observation circulated air, circulated air
Relative humidity from rapid rising be changed into it is slow rise or no longer change substantially when, represent that circulated air reaches this under the operating mode
Drying effect is too low during relative humidity, the relative humidity when relative humidity of circulated air is slowly risen or no longer changed substantially
It is set as the first switching humidity.
Interior circulation air door 17 and air draft air door 18 are closed, interior fresh air air door 19 and wet-emitting blower 13 is opened, into second step
Suddenly；
Second step is run by the dehumidification mode of evaporator 5；Now, in the presence of wet-emitting blower 13, in return airway 12
A part of return air enters hydrofuge air channel 14, and another part return air is then still directly back at circulating fan 6；Into hydrofuge air channel
14 circulated air enters heat pump machine hall 3 after heat regenerator 15 by the lower ending opening in hydrofuge air channel 14, after evaporator 5
The top of heat pump machine hall 3 is delivered to by thermo-compression evaporation blower fan 2, and enters fresh air duct 22 through interior fresh air air door 19, then passed through
Drying chamber fresh air air door 20 enters return airway 12, be introduced into after the circulated air in hydrofuge air channel 14 converges through circulating fan 6 and
Condenser 8 is admitted to drying chamber 9, and circulated air is heated at condenser 8, and produces drying to make the material in drying chamber 9
With；The air outlet on the right side of circulated air drying room 9 reenters return airway 12, forms circulation；
During the continuous service of second step, humidity circulated air higher temperature reduction when by evaporator 5, in evaporation
Condense out condensed water at device 5, realize dehumidifying；Air-flow after dehumidifying is through thermo-compression evaporation blower fan 2, fresh air air door 19, fresh air duct 22
Return airway 12 is reentered with drying chamber fresh air air door 20, after not mixed by the return air in hydrofuge air channel 14, is reduced back
The overall humidity of wind, so that circulated air recovers to absorb the ability of material reclaimed water point.The advantage of the dehumidification mode of evaporator 5 is also resided in
The cold produced using evaporator 5 itself removes the moisture of air in drying chamber 9, using a part of temperature circulated air band higher
The cold at evaporator 5 is walked, therefore the operating efficiency of heat pump is higher, heat pump is influenceed very by ambient temperature
It is small, solve the problems, such as that heat pump is less efficient when environment temperature is low.The shortcoming of the dehumidification mode of evaporator 5 is：When
Circulated air（Hydrofuge wind）When humidity is smaller, because hydrofuge wind dew-point temperature is relatively low, by possible after heat regenerator 15 and evaporator 5
Still reach to less than below dew-point temperature, or just reached dew-point temperature, the moisture being condensed out when now by evaporator 5 is very
Few, hydrofuge wind is turned again in drying chamber 9, does not have the effect for reducing air humidity in drying chamber 9（Or effect very little）, and
It is again invalidation process by the process of heater intensification that hydrofuge wind is lowered the temperature by evaporator 5, and not only effect on moisture extraction substantially and does not disappear
Consumption mass energy.
When the relative humidity in return airway 12 is less than the second switching humidity, hot air dehumidifying drying pattern is transferred to；Second
Switching humidity determines occurrence by staff more than or equal to 10 and less than or equal to 50% according to operating condition；
When drying certain material, the situation of condensate at staff's observation evaporator 5.When second step just brings into operation,
A large amount of condensates will necessarily be produced at evaporator 5.When no longer producing condensate at evaporator 5, or the condensate for producing
Amount very hour, the rh value of corresponding circulated air is set as the second switching humidity.
Outdoor fresh air air door 21, interior circulation air door 17 and air draft air door 18 are opened, interior fresh air air door 19 is closed, into the 3rd
Step；
Third step is to dry mode operation by hot air dehumidifying；Now, in the presence of wet-emitting blower 13, in return airway 12
A part of return air enters hydrofuge air channel 14 as hydrofuge wind, and another part return air is then still directly back at circulating fan 6；
Under the swabbing action of circulating fan 6, outdoor fresh air enters fresh air duct 22 by outdoor fresh air air door 21, by heat regenerator 15
When with hydrofuge wind carry out heat exchange, enter return airway through drying chamber fresh air air door 20 after the heat in hydrofuge wind is absorbed
12, and it is introduced into being admitted to drying chamber 9 through circulating fan 6 and condenser 8 after the circulated air in hydrofuge air channel 14 converges, after converging
Wind is heated at condenser 8, and produces drying functions to the material in drying chamber 9；The air-out on the right side of air-flow drying room 9
Mouth reenters return airway 12, so as to continuously run；
During the continuous service of third step, for evaporator 5 is carried when hot wet gas current in hydrofuge air channel 14 is by evaporator 5
Heating load, realizes Waste Heat Reuse；In the presence of thermo-compression evaporation blower fan 2, air-flow and heat pump machine hall in hydrofuge air channel 14
Outdoor air at air door 16 is inhaled into heat pump machine hall 3, takes away after the cold produced by evaporator 5 by the He of interior circulation air door 17
Air draft air door 18 is discharged；
When the relative humidity in return airway 12 is higher than the first switching humidity, the second step i.e. dehumidification mode of evaporator 5 is transferred to；
Four steps is after staff determines that drying materials degree is up to standard, to close each blower fan, each air door and heat pump
Compressor, drying chamber 9 is transported by material, stops dry materials process.
Above example is only used to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacement, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover in power of the invention
In the middle of sharp claimed range.
Claims (4)
1. there is the heat pump drying equipment of dehumidification type and hydrofuge type handoff functionality, it is characterised in that：Including heat pump and drying
Workshop, drying is sequentially provided with heat pump machine hall, return airway and the drying chamber for holding material from left to right in workshop；Return air
Air channel top is higher than drying chamber and extends to the right, and drying chamber right side is provided with air outlet, and air outlet is connected with return airway；
Heat pump machine hall bottom side is provided with heat pump machine hall air door, and heat pump machine hall has connected up exhaust air box；Return airway
Interior to be provided with hydrofuge air channel in tip position, the other end in hydrofuge air channel stretches into exhaust air box and extends downwardly into heat pump machine hall bottom；
Heat pump includes being circulated by refrigerant line compressor, condenser, throttling arrangement and the evaporator of connection, compression
Machine, throttling arrangement and evaporator composition heat pump main frame, heat pump main frame are located in heat pump machine hall, are set at the top of the heat pump main frame
There is the thermo-compression evaporation blower fan that air-out direction is upward；Evaporator is adjacent with the lower ending opening in hydrofuge air channel；Condenser is located at return air wind
Between the bottom and drying workshop in road；The hydrofuge air channel is interval with two, is set respectively at the right-end openings in each hydrofuge air channel
There is wet-emitting blower；
Interior circulation air door is provided between exhaust air box and heat pump machine hall, exhaust air box side wall is provided with air draft air door；
Fresh air duct is provided with the heat pump machine hall, the two ends of fresh air duct are opened on heat pump machine hall two lateral walls respectively
On, fresh air duct is respectively arranged at two ends with outdoor fresh air air door；Fresh air duct and each hydrofuge air channel in cross-shaped,
Fresh air duct is equipped with heat regenerator, the shell side or tube side and fresh air duct of each heat regenerator with the intersection in each hydrofuge air channel
It is connected, the tube side or shell side of each heat regenerator are connected with hydrofuge air channel；
Fresh air duct between two hydrofuge air channels is provided with drying chamber fresh air air door, drying chamber fresh air air door be located at fresh air duct and
Between return airway；
Air-out direction circulating fan directed downwardly is provided with return airway below fresh air duct, circulating fan is located at the upper of condenser
Side；
To point to the direction of drying chamber fresh air air door as introversive, interior fresh air is respectively equipped with the fresh air duct on the outside of two hydrofuge air channels
Air door, interior fresh air air door is located between fresh air duct and return airway.
2. the heat pump drying equipment with dehumidification type Yu hydrofuge type handoff functionality according to claim 1, it is characterised in that：
The heat pump machine hall air door spacing side by side is provided with two or more；The air draft air door is symmetrical in the two lateral walls of exhaust air box
It is provided with two.
3. the heat pump drying equipment with dehumidification type Yu hydrofuge type handoff functionality according to claim 1 and 2, its feature exists
In：Humidity sensor and temperature sensor are provided with the return airway.
4. have dehumidification type described in usage right requirement 3 carries out dry materials with the heat pump drying equipment of hydrofuge type handoff functionality
Method, it is characterised in that carry out according to the following steps successively：
First step is run by simple mode；Open heat pump machine hall air door, interior circulation air door, air draft air door, thermo-compression evaporation
Blower fan, compressor and circulating fan, close wet-emitting blower, interior fresh air air door, drying chamber fresh air air door and outdoor fresh air air door；
Now, under the draft effect of thermo-compression evaporation blower fan, outdoor air by heat pump machine hall air door enter heat pump machine hall with
Evaporator heat exchange, the cold that evaporator is produced is discharged by interior circulation air door and air draft air door；In the presence of circulating fan,
Circulated air passes downwardly through condenser and enters drying chamber, and circulated air is heated when by condenser, and the circulated air after heating exists
Drying functions are produced to material in drying chamber；The water vapour produced during drying materials is taken away by circulated air, and circulated air is passed through back
Wind air channel is returned at circulating fan, so as to the continuous material drying in cyclic process；
In the running of simple mode, when material is persistently dried, the water vapour of generation constantly enters in circulated air；Circulated air
Relative humidity it is higher, drying effect is lower；When the relative humidity in return airway is higher than the first switching humidity, second is transferred to
Step is evaporator dehumidification mode；The first switching humidity is more than 50% and less than or equal to 80%, by staff according to operation
Operating mode determines occurrence；
Interior circulation air door and air draft air door are closed, interior fresh air air door and wet-emitting blower is opened, into second step；
Second step is run by evaporator dehumidification mode；Now, in the presence of wet-emitting blower, the part in return airway
Return air enters hydrofuge air channel, and another part return air is then still directly back at circulating fan；Into the circulated air in hydrofuge air channel
Heat pump machine hall is entered by the lower ending opening in hydrofuge air channel after heat regenerator, by being sent by thermo-compression evaporation blower fan after evaporator
To the top of heat pump machine hall, and enter fresh air duct through interior fresh air air door, return air is then entered by drying chamber fresh air air door
Air channel, and is introduced into being admitted to drying chamber through circulating fan and condenser after the circulated air in hydrofuge air channel converges, and circulated air is cold
Heated at condenser, and drying functions are produced to the material in drying chamber；Air outlet on the right side of circulated air drying room is again
Into return airway, circulation is formed；
When the relative humidity in return airway is less than the second switching humidity, hot air dehumidifying drying pattern is transferred to；Second switching is wet
Degree determines occurrence by staff more than or equal to 10 and less than or equal to 50% according to operating condition；
Outdoor fresh air air door, interior circulation air door and air draft air door are opened, interior fresh air air door is closed, into third step；
Third step is to dry mode operation by hot air dehumidifying；Now, in the presence of wet-emitting blower, one in return airway
Return air is divided to enter hydrofuge air channel as hydrofuge wind, another part return air is then still directly back at circulating fan；In circulated air
Under the swabbing action of machine, outdoor fresh air enters fresh air duct by outdoor fresh air air door, enters with hydrofuge wind when by heat regenerator
Row heat exchange, return airway is entered after the heat in hydrofuge wind is absorbed through drying chamber fresh air air door, and is introduced into hydrofuge wind
The circulated air in road is admitted to drying chamber after converging through circulating fan and condenser, and the wind after converging is heated at condenser,
And drying functions are produced to the material in drying chamber；Air outlet on the right side of air-flow drying room reenters return airway, so that
Continuously run；
During the continuous service of third step, for evaporator provides heat when hot wet gas current in hydrofuge air channel is by evaporator
Amount, realizes Waste Heat Reuse；In the presence of thermo-compression evaporation blower fan, at the air-flow and heat pump machine hall air door in hydrofuge air channel
Outdoor air is inhaled into heat pump machine hall, is discharged by interior circulation air door and air draft air door after taking away the cold produced by evaporator；
When the relative humidity in return airway is higher than the first switching humidity, second step i.e. evaporator dehumidification mode is transferred to；
Four steps be drying materials degree it is up to standard after, the compressor of each blower fan, each air door and heat pump is closed, by material
Drying chamber is transported, stops dry materials process.
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| CN201710208014.6A CN106855353B (en) | 2017-03-31 | 2017-03-31 | Heat pump drying equipment with dehumidification type and dehumidification type switching function and drying method |
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