CN109595926A - A kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System and drying means - Google Patents
A kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System and drying means Download PDFInfo
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- CN109595926A CN109595926A CN201811398268.XA CN201811398268A CN109595926A CN 109595926 A CN109595926 A CN 109595926A CN 201811398268 A CN201811398268 A CN 201811398268A CN 109595926 A CN109595926 A CN 109595926A
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- pressure evaporator
- heat pump
- low pressure
- air duct
- gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
-
- 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
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
-
- 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
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention provides a kind of Analysis of Heat Pump Drying System of Gas-supplying enthalpy-increasing, it include: heat pump cycle subsystem and dry air cycle subsystem, heat pump cycle subsystem includes compressor, middle pressure evaporator, low pressure evaporator, condenser, and compressor outlet is connected with condenser refrigerant inlet；Condensator outlet is divided into two branches, the first branch is connected with the refrigerant inlet of middle pressure evaporator, second branch is connected with low pressure evaporator refrigerant inlet, middle pressure evaporator refrigerant outlet is connected with compressor gas supplementing opening, low pressure evaporator refrigerant outlet is connected with suction port of compressor, and dry air cycle subsystem includes main air duct, main air blower, bypass air duct and bypass blower.Invention additionally discloses a kind of drying means of the Analysis of Heat Pump Drying System of Gas-supplying enthalpy-increasing.The present invention presses evaporator to carry out precooling treatment to drying cycles air in, reduces the waste of energy grade, reduces the wasted work of compressor, improves the drying property of system, be a kind of energy conservation, efficiently, the Analysis of Heat Pump Drying System that can easily be accommodated.Of the invention drying system energy conservation, efficiently, can easily be accommodated.
Description
Technical field
The invention belongs to technical field of drying, more particularly to a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System and drying means.
Background technique
Currently, the industries such as the processing of agricultural, food, chemical industry, ceramics, medicine, mineral products, pulping and paper-making, timber processing, own
Production process will nearly all use drying, and the quality of dried material depends on whether to control stationary temperature well.And heat pump
Drying technology is a current emerging technology, be it is a kind of mild, close to natural drying mode, be more suitable for most of agricultural production
The drying of the heat sensitive materials such as product, medicinal material.
Currently, mainstream heat pump drying is mainly the Analysis of Heat Pump Drying System of dehumidification type.Dry air is by the condensation of heat pump system
Device, which is heated into high temperature low-humidity air and enters hothouse, is dried wet stock, and the highly humid air after hothouse is using heat pump out
The evaporator of system carries out cooling and dehumidifying, and the moisture in highly humid air exhausts after evaporator surface is condensed into condensed water, from steaming
Dry air after hair device comes out is heated through condenser again, is so recycled, has achieved the effect that desiccant dehumidification.Heat pump drying
During the dehumidification by condensation that evaporator carries out, humid air after being first cooled to dew-point temperature just starts that moisture is precipitated system,
It dehumidifies.And humid air is cooled to cooling capacity required for this process of dew-point temperature and does not make humid air that moisture be precipitated, because
This this part cooling capacity is known as invalid cooling capacity.But since traditional heat pump drying carries out cooling and dehumidifying using the same evaporator
Unified processing leads to the problem of handling " the low use of high energy " of low-grade cooling capacity using high-grade cooling capacity.So not only by
Increase in the too low power consumption so as to cause compressor of evaporating temperature, also results in the drying property decline of heat pump.If it is possible to
A kind of Analysis of Heat Pump Drying System is designed, is first handled humid air to close to dew point using higher evaporating temperature, then using lower
Evaporating temperature dehumidifies, and by the effective waste for reducing energy grade, reduces the wasted work of compressor, improves the drying property of heat pump
Energy.
Summary of the invention
The object of the present invention is to provide a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System and drying means, solve existing heat pump techniques
Middle heat pump energy consumption is high, the problem of drying property difference.
In order to solve the above technical problems, the present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, comprising: heat pump cycle
System and dry air cycle subsystem, the heat pump cycle subsystem include compressor, middle pressure evaporator, low pressure evaporation
Device, condenser, middle pressure evaporator, low pressure evaporator and the condenser are successively set on the master of dry air cycle subsystem
In air duct, the condenser inlet is connected with the refrigerant outlet of compressor；The condensator outlet is divided into two branches,
The middle first branch is connected with the refrigerant inlet of middle pressure evaporator, and second branch is connected with low pressure evaporator refrigerant inlet, institute
The middle pressure evaporator refrigerant outlet stated is connected with compressor gas supplementing opening, the low pressure evaporator refrigerant outlet and compressor
Refrigerant inlet is connected.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, and the heat pump cycle subsystem also includes two expansions
Valve, the first expansion valve are arranged on the refrigerant pipe road of middle pressure evaporator inlet, and the setting of the second expansion valve enters in low pressure evaporator
On the pipeline of mouth, the expansion valve is selected from one of heating power expansion valve, electric expansion valve.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, and the heat pump cycle subsystem also includes refrigerant stream
Adjustable valve, regulating valve are arranged in front of the first expansion valve of the first branch, shown in flow control valve be selected from motor-driven valve, electromagnetism
One of valve.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, and the heat pump cycle subsystem further includes check-valves,
The check-valves is arranged on the refrigerant pipe road of compressor gas supplementing opening.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, and the compressor of the heat pump cycle subsystem is frequency conversion
Compressor.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, further includes condensate line, the condensate line
It is arranged in middle pressure evaporator and low pressure evaporator lower part.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, and the dry air cycle subsystem includes drying
Room, main air duct, main air blower, the main air duct connect to form closed loop channel with hothouse air intake vent, air outlet respectively, with hothouse
It is equipped with the condenser in the main air duct of air intake vent connection, is equipped with medium pressure in the main air duct connecting with hothouse air outlet and steams
Device is sent out, the low pressure evaporator setting is in main air duct and between medium pressure evaporator and condenser；On main air duct
It is additionally provided with main air blower, driving circulation air recycles in the closed loop channel that main air duct is constituted with hothouse, and circulation air is in main wind
Successively enter hothouse in road after middle pressure evaporator, low pressure evaporator and condenser.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, and the dry air cycle subsystem further includes filtering
Device, auxiliary thermal source, the filtering are arranged on the main air duct of hothouse dry air outlet, and the auxiliary thermal source setting exists
On the main air duct of condensator outlet.
The present invention provides a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System, and the dry air cycle subsystem further includes bypass
Air duct, described bypass air duct one end are arranged on the main air duct between low pressure evaporator and condenser, and the other end enters with hothouse
Air port connection；It is equipped with bypass blower in bypass air duct, drives the circulation air between low pressure evaporator and condenser to enter dry
Dry room is additionally provided with volume damper on the bypass air duct.
Invention additionally discloses a kind of drying means such as Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System of the invention, including following step
It is rapid:
The high humidity dry air of hothouse outlet, first passes through filter, crosses the impurity that may contain in air filtering, then by
Main air blower conveying, successively pass through in main air duct in press evaporator, low pressure evaporator and condenser, be pre-chilled, dehumidified and added
Heat is dried then into dried object is treated in hothouse；
By the refrigerant flow regulating valve in adjusting heat pump drying system, low pressure evaporator and middle pressure evaporator are adjusted
Flow distribution of refrigerant makes low pressure evaporator and middle pressure evaporator cooperate, higher evaporating temperature in evaporator is pressed in utilization
Refrigerant circulation air is pre-chilled, accelerate the cooling rate of circulation air, lower evaporating temperature in low pressure evaporator
Refrigerant dehumidifies to circulation air, reduces the cooling capacity of dehumidification process consumption, improves circulating dehumidification performance；
When pressing the circulation air humidity of evaporator larger in entrance, when temperature is lower, refrigerant flow regulating valve is turned down
Aperture presses the flow of refrigerant in evaporator in reduction, the heat exchange amount of evaporator is pressed in reduction；Meanwhile increasing low pressure evaporator
The flow of middle refrigerant improves the heat exchange amount of low pressure evaporator, precools circulation air first in middle pressure evaporator and (does not remove
It is wet) and then dehumidify in low pressure evaporator；
When the circulating air temperature of pressure evaporator in entrance is higher, the aperture of refrigerant flow regulating valve is tuned up, is increased
The flow of refrigerant in middle pressure evaporator proposes the heat exchange amount of high pressure evaporator, presses higher evaporating temperature in evaporator in utilization
Refrigerant, make circulation air fast cooling, be adequately pre-chilled, and then can have better dehumidifying in low pressure evaporator
Effect；
When the condenser heat in Analysis of Heat Pump Drying System not can guarantee the temperature for entering dry indoor dry air,
Auxiliary thermal source is opened, temperature is further promoted；When the condenser heat in Analysis of Heat Pump Drying System is larger, the temperature of dry air
When requiring more than drying process, the volume damper in bypass air duct is opened, by controlling the aperture of volume damper, control bypass
The ratio between air quantity and main air quantity realize the state modulator of hothouse inlet drying air.Meanwhile it can use compressor variable frequency in turn
The capacity of adjusting heat pump cooperates with above two control mode, and the runnability of system is made to reach best with control.
Beneficial effect
A kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System provided by the invention and working method use middle pressure evaporator and low pressure
Evaporator combination and cooperation handles drying cycles air, and middle pressure evaporator is using the refrigerant of higher evaporating temperature to circulation
Air is pre-chilled, low pressure evaporator dehumidifies to circulation air using the refrigerant of lower evaporating temperature.Firstly, by removing
Circulation air after wet is easier to make temperature lower than dew-point temperature in low pressure evaporator, greatly increases identical evaporator face
Moisture removal under product guarantees the parameter of circulation air to the maximum extent；Secondly, evaporating temperature is lower for refrigeration system
Performance is poorer, and energy consumption is higher, presses evaporator to may be implemented to improve cooling refrigerant temperature in, is conducive to unit
Energy.
And the middle compression refrigerant steam of evaporator generation is pressed to carry out Gas-supplying enthalpy-increasing to compressor in, it can effectively drop
The ratio function of low compressor significantly reduces the power consumption of compressor, heating capacity is improved, so that heat pump performance is significantly improved；Meanwhile
Regulating valve, auxiliary thermal source and bypass air duct are set and change the displacement of compressor, to adjust by adjusting compressor frequency
The flow of refrigerant achievees the purpose that the capacity for controlling heat pump, can adjust the heat exchange amount of condenser, evaporator in this way, thus
The temperature and humidity of control loop air, to meet the drying demand of the hothouse under different load demand；Substantially increase dry system
The regulation performance of system, so that the effect of actual motion is protected.Of the invention drying system energy conservation, efficiently, can easily be accommodated.
The present invention utilizes the setting of mesolow evaporator, on the one hand improves the effect on moisture extraction of drying cycles air；It is another
Aspect reduces the power consumption of compressor by way of middle compression refrigerant is to compressor tonifying Qi, improves the heating capacity of condenser,
It is a kind of energy saving, efficient Analysis of Heat Pump Drying System to improve the performance of heat pump cycle.
A kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System provided by the invention and working method use middle pressure evaporator and low pressure
Evaporator, which is combined, handles drying cycles air, improves the effect on moisture extraction of circulation air, guarantees dry indoor technique ginseng
Number requires；And the middle compression refrigerant steam of evaporator generation is pressed to carry out Gas-supplying enthalpy-increasing to compressor in, significantly reduce compression
The power consumption of machine improves heating capacity, so that heat pump performance is significantly improved；Meanwhile regulating valve, auxiliary thermal source and bypass wind are set
Road substantially increases the regulation performance of drying system, so that the effect of actual motion is protected.Drying system section of the invention
Can, efficiently, can easily be accommodated.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System of the present invention.
In figure, 1, compressor；2, condenser；3, refrigerant flow regulating valve；4, the first expansion valve；5, middle pressure evaporator；
6, the second expansion valve；7, low pressure evaporator；8, check-valves；9, main air blower；10 hothouses；11, filter；12, volume damper；
13, blower is bypassed；14, auxiliary thermal source；15, main air duct；16, air duct is bypassed.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Following instance
For illustrating the present invention, but it is not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Embodiment 1
Referring to attached drawing 1, the present invention discloses a kind of tonifying Qi pressurization Analysis of Heat Pump Drying System, including heat pump cycle subsystem and drying
Air circulation subsystem.
The heat pump cycle subsystem includes compressor 1, middle pressure evaporator 5, low pressure evaporator 7, condenser 2, described
Middle pressure evaporator 5, low pressure evaporator 7 and condenser 2 be successively set in the main air duct 15 of dry air cycle subsystem, institute
2 entrance of condenser is stated to be connected with the refrigerant outlet of compressor 1；The outlet of condenser 2 is divided into two branches, wherein first
Branch is connected with the refrigerant inlet of middle pressure evaporator 5, and second branch is connected with 7 refrigerant inlet of low pressure evaporator, described
Middle 5 refrigerant outlet of pressure evaporator is connected with 1 gas supplementing opening of compressor, 7 refrigerant outlet of low pressure evaporator and compressor 1
Refrigerant inlet is connected, and the first expansion valve 4 and refrigerant flow regulating valve 3 is provided in the first branch, to supercooling
Refrigerant liquid carry out decompression throttling, and adjust the flow of refrigerant；The second expansion is provided in the second branch
Valve 6 carries out decompression throttling to the refrigerant liquid of supercooling；It is additionally provided with check-valves 8 on the 1 blowdown pipe road of compressor,
Guarantee that the refrigerant vapour in compressor will not be in recharge to middle pressure evaporator；
The dry air cycle subsystem includes hothouse 10, main air duct 15, main air blower 9, filter 11, auxiliary heat
Source 14, bypass air duct 16, the main air duct connect to form closed loop channel with 10 air intake vent of hothouse, air outlet respectively, with drying
It is equipped with the condenser 2 in the main air duct 15 of 10 air intake vent of room connection, is equipped in the main air duct being connect with 10 air outlet of hothouse
Medium pressure evaporator 5, the low pressure evaporator 7 are arranged in main air duct 15 and in medium pressure evaporator 5 and condensers 2
Between；Main air blower 9 is additionally provided on main air duct 15, driving circulation air is in the closed loop channel that main air duct 15 and hothouse 10 are constituted
Interior circulation, circulation air successively enter drying in main air duct 15 after middle pressure evaporator 5, low pressure evaporator 7 and condenser 2
Room；The filter 11 is arranged on the main air duct 15 of 10 dry air of hothouse outlet, and the auxiliary thermal source 14 is arranged
On the main air duct 15 that condenser 2 exports；Described 16 one end of bypass air duct is arranged between low pressure evaporator 7 and condenser 2
On main air duct 15, the other end is connect with 10 air intake vent of hothouse；Bypass blower 13 is equipped in bypass air duct 16, driving low pressure is steamed
Circulation air between hair device 7 and condenser 2 enters hothouse 10, is additionally provided with volume damper on the bypass air duct 16
12；
Specifically, low pressure refrigerant vapor is compressed to after middle pressure by compressor 1, and in middle pressure evaporator 5
After the mixing of compression refrigerant steam, continued the state for being compressed to high pressure-temperature by compressor 1, then into condenser 2, cold
Refrigerant is cooled down by cyclic drying air in condenser 2, becomes the refrigerant liquid of high normal pressure and temperature.Then, refrigerant liquid is divided into
Two branches, the refrigerant liquid of the first branch is throttled to the state of middle pressure by the decompression of the first expansion valve 4, then into middle pressure
It is evaporated in evaporator 5, circulation air is pre-chilled, guarantee the high efficiency of following cycle air dewetting, then middle compression refrigerant
Steam enters in compressor from the gas supplementing opening of compressor 1；The refrigerant liquid of second branch is depressured by the second expansion valve 6 and throttles
To the state of low pressure, then into evaporating in low pressure evaporator 7, cooling and dehumidifying processing is carried out to circulation air, then low pressure
Refrigerant vapour entered in compressor from the air entry of compressor 1.Produced by low pressure evaporator 7 and middle pressure evaporator 5
Condensed water, be discharged by condensate line.
Specifically, becoming high after the circulation air of high temperature drying is dried high moisture material in hothouse 10
The air of water capacity is discharged out of hothouse 10.It after filter filters, is conveyed by main air blower 9, is successively pressed in process
Evaporator 5, low pressure evaporator 7, condenser 2 and auxiliary thermal source 14, are pre-chilled, are dehumidified, are heated and are heat-treated again.Circulation air
After pressing evaporator 5 to be pre-chilled in, it can be improved its effect on moisture extraction in low pressure evaporator 7, guarantee the shape of circulation air
State meets the parameter request of hothouse 10.Auxiliary thermal source 14 is opened in the thermal discharge deficiency of condenser 2, is supplemented circulation air
Heat.
Further, the circulation air after low pressure evaporator 7, by bypassing air duct 16, bypass a part arrives drying
The entrance of room 10 opens volume damper 12, regulating main air road 15 and bypass air duct 16 when the thermal discharge of condenser 2 is excessive
Air quantity ratio, hothouse 10 entrance with by processing after circulation air mixed, to achieve the purpose that adjusting.
Embodiment 2
The drying means of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System of the present invention, comprising:
The high humidity dry air of hothouse outlet, first passes through filter, crosses the impurity that may contain in air filtering, then by
Main air blower conveying, successively pass through in main air duct in press evaporator, low pressure evaporator and condenser, be pre-chilled, dehumidified and added
Heat is dried then into dried object is treated in hothouse；
By the refrigerant flow regulating valve in adjusting heat pump drying system, low pressure evaporator and middle pressure evaporator are adjusted
Flow distribution of refrigerant makes low pressure evaporator and middle pressure evaporator cooperate, higher evaporating temperature in evaporator is pressed in utilization
Refrigerant circulation air is pre-chilled, accelerate the cooling rate of circulation air, lower evaporating temperature in low pressure evaporator
Refrigerant dehumidifies to circulation air, reduces the cooling capacity of dehumidification process consumption, improves circulating dehumidification performance；
When pressing the circulation air humidity of evaporator larger in entrance, when temperature is lower, refrigerant flow regulating valve is turned down
Aperture presses the flow of refrigerant in evaporator in reduction, the heat exchange amount of evaporator is pressed in reduction；Meanwhile increasing low pressure evaporator
The flow of middle refrigerant improves the heat exchange amount of low pressure evaporator, precools circulation air first in middle pressure evaporator and (does not remove
It is wet) and then dehumidify in low pressure evaporator；
When the circulating air temperature of pressure evaporator in entrance is higher, the aperture of refrigerant flow regulating valve is tuned up, is increased
The flow of refrigerant in middle pressure evaporator proposes the heat exchange amount of high pressure evaporator, presses higher evaporating temperature in evaporator in utilization
Refrigerant, make circulation air fast cooling, be adequately pre-chilled, and then can have better dehumidifying in low pressure evaporator
Effect；The present invention utilizes the setting of mesolow evaporator, on the one hand improves the effect on moisture extraction of drying cycles air；On the other hand
By way of middle compression refrigerant is to compressor tonifying Qi, the power consumption of compressor is reduced, improves the heating capacity of condenser, thus
The performance for improving heat pump cycle is a kind of energy saving, efficient Analysis of Heat Pump Drying System.
When the condenser heat in Analysis of Heat Pump Drying System not can guarantee the temperature for entering dry indoor dry air,
Auxiliary thermal source is opened, temperature is further promoted；When the condenser heat in Analysis of Heat Pump Drying System is larger, the temperature of dry air
When requiring more than drying process, the volume damper in bypass air duct is opened, by controlling the aperture of volume damper, control bypass
The ratio between air quantity and main air quantity realize the state modulator of hothouse inlet drying air.Meanwhile it can use compressor variable frequency in turn
The capacity of adjusting heat pump cooperates with above two control mode, and the runnability of system is made to reach best with control.
A kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System provided by the invention and working method use middle pressure evaporator and low pressure
Evaporator, which is combined, handles drying cycles air, improves the effect on moisture extraction of circulation air, guarantees dry indoor technique ginseng
Number requires；And the middle compression refrigerant steam of evaporator generation is pressed to carry out Gas-supplying enthalpy-increasing to compressor in, significantly reduce compression
The power consumption of machine improves heating capacity, so that heat pump performance is significantly improved；Meanwhile regulating valve, auxiliary thermal source and bypass wind are set
Road substantially increases the regulation performance of drying system, so that the effect of actual motion is protected.Drying system section of the invention
Can, efficiently, can easily be accommodated.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System characterized by comprising heat pump cycle subsystem and dry air circulation
System, the heat pump cycle subsystem include compressor, middle pressure evaporator, low pressure evaporator, condenser, and the middle pressure is steamed
Hair device, low pressure evaporator and condenser are successively set in the main air duct of dry air cycle subsystem, the condenser inlet
It is connected with the refrigerant outlet of compressor；The condensator outlet is divided into two branches, and wherein the first branch and middle pressure are evaporated
The refrigerant inlet of device is connected, and second branch is connected with low pressure evaporator refrigerant inlet, the middle pressure evaporator refrigerant
Outlet is connected with compressor gas supplementing opening, and the low pressure evaporator refrigerant outlet is connected with compressor refrigerant entrance.
2. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as described in claim 1, which is characterized in that the heat pump cycle subsystem is also
Comprising two expansion valves, the first expansion valve is arranged on the refrigerant pipe road of middle pressure evaporator inlet, and the setting of the second expansion valve exists
On the pipeline of low pressure evaporator entrance, the expansion valve is selected from one of heating power expansion valve, electric expansion valve.
3. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as described in claim 1, which is characterized in that the heat pump cycle subsystem is also
Comprising refrigerant flow regulating valve, regulating valve is arranged in front of the first expansion valve of the first branch, shown in flow control valve choosing
From one of motor-driven valve, solenoid valve.
4. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as described in claim 1, which is characterized in that the heat pump cycle subsystem is also
Including check-valves, the check-valves is arranged on the refrigerant pipe road of compressor gas supplementing opening.
5. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as described in claim 1, which is characterized in that the heat pump cycle subsystem
Compressor is frequency-changeable compressor.
6. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as described in any one in claim 1-5, which is characterized in that further include condensate pipe
Road, the condensate line are arranged in middle pressure evaporator and low pressure evaporator lower part.
7. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as claimed in claim 6, which is characterized in that the dry air recycles subsystem
System includes hothouse, main air duct, main air blower, and the main air duct connect that form closed loop logical with hothouse air intake vent, air outlet respectively
Road is equipped with the condenser in the main air duct connecting with hothouse air intake vent, sets in the main air duct connecting with hothouse air outlet
Have a medium pressure evaporator, the low pressure evaporator be arranged in main air duct and in medium pressure evaporator and condenser it
Between；Main air blower is additionally provided on main air duct, driving circulation air is recycled in the closed loop channel that main air duct is constituted with hothouse, followed
Annular space gas successively enters hothouse in main air duct after middle pressure evaporator, low pressure evaporator and condenser.
8. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as claimed in claim 7, which is characterized in that the dry air recycles subsystem
System further includes filter, auxiliary thermal source, and the filtering is arranged on the main air duct of hothouse dry air outlet, and described is auxiliary
Heat source is helped to be arranged on the main air duct of condensator outlet.
9. Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as claimed in claim 8, which is characterized in that the dry air recycles subsystem
System further includes bypass air duct, and described bypass air duct one end is arranged on the main air duct between low pressure evaporator and condenser, another
End is connect with hothouse air intake vent；It is equipped with bypass blower in bypass air duct, drives following between low pressure evaporator and condenser
Annular space gas enters hothouse, is additionally provided with volume damper on the bypass air duct.
10. the drying means of the Gas-supplying enthalpy-increasing Analysis of Heat Pump Drying System as described in any one of right 1-9, comprising the following steps:
The high humidity dry air of hothouse outlet, first passes through filter, is then conveyed by main air blower, successively passed through in main air duct
Middle pressure evaporator, low pressure evaporator and condenser, are pre-chilled, are dehumidified and are heated, then into hothouse to be dried
Object is dried；
By the refrigerant flow regulating valve in adjusting heat pump drying system, the refrigeration of low pressure evaporator and middle pressure evaporator is adjusted
Agent flux distribution makes low pressure evaporator and middle pressure evaporator cooperate, the system of higher evaporating temperature in evaporator is pressed in utilization
Circulation air is pre-chilled in cryogen, accelerates the cooling rate of circulation air, utilizes evaporating temperature lower in low pressure evaporator
Refrigerant dehumidifies to circulation air, reduces the cooling capacity of dehumidification process consumption, improves circulating dehumidification performance；
By adjusting auxiliary thermal source and bypassing volume damper control bypass the ratio between the air quantity and main air quantity in air duct, hothouse is adjusted
The parameter of inlet drying air；Meanwhile in the way of the Collaborative Control of the capacity of compressor variable frequency adjusting heat pump, make the fortune of system
Row performance reaches best with control.
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