CN109442889B - One mode changeable waste heat recovery type heat pump drying device and its operation method - Google Patents
One mode changeable waste heat recovery type heat pump drying device and its operation method Download PDFInfo
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- CN109442889B CN109442889B CN201811177636.8A CN201811177636A CN109442889B CN 109442889 B CN109442889 B CN 109442889B CN 201811177636 A CN201811177636 A CN 201811177636A CN 109442889 B CN109442889 B CN 109442889B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- 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
- F26B21/06—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
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- 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
Abstract
The invention discloses waste heat recovery type heat pump drying devices and its operation method that one mode can be switched.The device includes heat pump system and air treatment system.The heat pump system includes compressor, condenser, throttling set, evaporator, economizer, supplementary heat exchanger, flow control valve and connecting line；The air treatment system includes hothouse, two regenerators, two blowers, six Electric air valves and connecting line.Two regenerators are added in the present invention in conventional heat pump drying system, realize the multistage recycling of dry waste heat；Also set up six Electric air valves simultaneously, it can be achieved that multiple operational modes switching, guarantee energy saving of the device within the scope of full working scope.
Description
Technical field
The present invention relates to the changeable waste heat recovery type heat pump drying devices in heat pump drying field more particularly to one mode
And its operation method.
Background technique
Heated-air drying is drying mode most commonly seen in mechanical drying, has material handling capacity is big, equipment cost is low etc.
Advantage.According to the difference of heat resource form, heated-air drying can be divided into coal-fired drying, combustion bavin drying, heat pump drying, solar drying
Deng.Coal-fired, combustion bavin drying process high energy consumption, high pollution, furthermore coal-fired combustion bavin drying course the degree of automation is low, drying course without
Method realizes accurate control, causes quality after dry materials not can guarantee, the solar energy drying problem unstable there is also heat source.Heat
The features such as pump is dry due to energy-efficient, safe and reliable, high degree of automation, small by such environmental effects is increasingly becoming dry
The main of dry field applies means.
There is also some shortcomings for current heat pump drying.Common Analysis of Heat Pump Drying System can be divided into open system, closed system
With semi-open type system etc., applicable environmental condition is individually present, most Analysis of Heat Pump Drying System not can guarantee in full working scope model
There is preferable energy saving in enclosing.In addition, the waste of hydrofuge waste gas residual heat is serious, start-up course heating is also that current heat pump is dry more slowly
Dry equipment common problem.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide to have higher energy conservation within the scope of a kind of guarantee full working scope
Property the changeable waste heat recovery type heat pump drying device of mode；
The present invention is quasi- to be achieved the object of the present invention with following technical solution:
The changeable waste heat recovery type heat pump drying device of mode, it includes heat pump systems and air treatment system；
The heat pump system include compressor, condenser, evaporator, supplementary heat exchanger, economizer, first throttling device,
Second throttling device and flow control valve；
The connection type of the heat pump system are as follows:
The exhaust outlet of the compressor is connected with the entrance of the flow control valve, the air entry of the compressor with it is described
The outlet of evaporator is connected, and the intermediate puff prot of the compressor is connected with the outlet of the second flow channel of the economizer；
The entrance of the condenser is connected with the outlet of the flow control valve, the outlet of the condenser and the auxiliary
The outlet of heat exchanger is divided into two branches and fills respectively with the first runner entrance of the economizer and second throttling after being connected
The entrance set is connected；
The entrance of the evaporator is connected with the outlet of the first throttling device；
The entrance of the supplementary heat exchanger is connected with the Bypass outlet of the flow control valve；
The first runner outlet of the economizer is connected with the entrance of the first throttling device, and the second of the economizer
Flow channel entry point is connected with the outlet of the second throttling device；
The air treatment system includes hothouse, the first blower, the second blower, the first regenerator, the second regenerator,
One Electric air valve, the second Electric air valve, third Electric air valve, the 4th Electric air valve, the 5th Electric air valve, the 6th Electric air valve and
Air duct；
The connection type of the air treatment system are as follows:
The condenser, evaporator, the first blower, the second blower, the first regenerator, the second regenerator, the first electronic wind
Valve, the second Electric air valve, third Electric air valve, the 4th Electric air valve, the 5th Electric air valve and the 6th Electric air valve are installed in
In the air duct；Two runners are all had in first regenerator and the second regenerator；
The lower section of the hothouse is equipped with air outlet, and top is equipped with discharge outlet, and the composition that is connected with the air duct is recycled back to
Road；
The first runner entrance of first regenerator is connected by the air duct with the hothouse discharge outlet, first-class
Road outlet is connected by the air duct with the first Electric air valve entrance, and the second flow channel entrance of first regenerator passes through
The air duct is connected with the 4th Electric air valve outlet, and second flow channel outlet is blown with by the air duct and the hothouse
Mouth is connected；
The outlet of the first runner entrance of second regenerator and first Electric air valve is connected, first runner outlet and
The evaporator inlet is connected, and the second flow channel entrance is connected with the evaporator outlet, and second flow channel exports and described the
One fans entrance is connected；
The outlet of first blower is connected with the 4th Electric air valve entrance；
The entrance of second blower is connected with external environment, and outlet is connected with the 5th Electric air valve；
Second Electric air valve side is connected with external environment, and the other side connects first regenerator and described first
Air duct among Electric air valve；
Third Electric air valve side is connected with external environment, and the other side connects second regenerator and described first
Air duct among Electric air valve；
The 5th Electric air valve side is connected with second blower, and the other side connects first regenerator and described
Air duct among 4th Electric air valve；
The 6th Electric air valve side is connected with external environment, and the other side connects first blower and the 4th electricity
Air duct among dynamic air-valve.
Further, the compressor is air injection enthalpy-increasing vortex frequency-changeable compressor.
Further, first blower and the second blower are frequency conversion fan.
Another object of the present invention is to provide a kind of operation methods such as above-mentioned heat pump drying device comprising enclosed fortune
Row mode, open type dehumidification operating mode and open type not dehumidification operating mode；
In the enclosed operational mode:
The compressor, the first blower are opened, and the first Electric air valve, the 4th Electric air valve are opened；The shutdown of second blower, the
Two Electric air valves, third Electric air valve, the 5th Electric air valve, the 6th Electric air valve are closed；
The compressor adjusts revolving speed according to the dry indoor air relative humidity PID；The flow control valve according to
The dry indoor air temperature PID adjusts bypath valve aperture；The first blower work is in declared working condition；
In the open type not dehumidification operating mode:
The compressor, the first blower, the second blower are opened, the second Electric air valve, third Electric air valve, the 5th electronic wind
Valve, the 6th Electric air valve are opened；First Electric air valve, the 4th Electric air valve are closed；
Second blower adjusts revolving speed according to the dry indoor air relative humidity PID；The compressor is according to institute
It states dry indoor air temperature PID and adjusts revolving speed；
In the open type dehumidification operating mode:
The compressor, the first blower are opened, and the second Electric air valve, third Electric air valve, the 4th Electric air valve are opened；The
The shutdown of two blowers, the first Electric air valve, the 5th Electric air valve, the 6th Electric air valve are closed；
The compressor adjusts revolving speed according to the dry indoor air relative humidity PID；The flow control valve according to
The dry indoor air temperature PID adjusts bypath valve aperture；The first blower work is in declared working condition.
Further, the heat pump drying device selects optimum operation mode according to ambient temperature and humidity condition.
Compared with prior art, the changeable waste heat recovery type heat pump drying device of one mode of the present invention has
Advantage be:
First, the present invention can change the fortune of heat pump drying device by the start and stop of the switch and frequency conversion fan of Electric air valve
Row mode: when outdoor air relative humidity is higher, dry indoor vent ratio outdoor air, which is more suitable, to be recycled, and is used
Enclosed operational mode；When outdoor air relative humidity is lower, can be used with hothouse is sent directly into after heating to outside air
Open type not dehumidification operating mode；When outdoor air relative humidity is moderate, need to be dehumidified to outside air, heat after be re-fed into
Hothouse, using open type dehumidification operating mode；Guarantee that heat pump drying device has higher energy saving within the scope of full working scope；
Second, the present invention is integrated with dual regenerator, it can be achieved that the waste heat of hydrofuge exhaust gas recycles, and utilizes evaporator outlet
Cryogenic air to enter evaporator air be pre-chilled, reduce system cool-down dehumidification energy consumption；
Third, the present invention is added to economizer component compared with conventional heat pump drying device, and uses Gas-supplying enthalpy-increasing compressor,
The operational efficiency under big temperature difference operating condition can be improved；
4th, the frequency-changeable compressor that the present invention uses can also preferably solve the problems, such as that dry start-up course heating is slower.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
Adequately understand the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is knot of the changeable waste heat recovery type heat pump drying device of one mode of the present invention under enclosed operational mode
Structure schematic diagram；
Fig. 2 is the changeable waste heat recovery type heat pump drying device of one mode of the present invention in open type not dehumidification operating mode
Under structural schematic diagram；
Fig. 3 is the changeable waste heat recovery type heat pump drying device of one mode of the present invention under open type dehumidification operating mode
Structural schematic diagram；
In figure: hothouse 1, compressor 2, condenser 3, evaporator 4, auxiliary condenser 5, economizer 6, first throttling device
7, second throttling device 8, flow control valve 9, the first blower 10, the second blower 11, the first regenerator 12, the second regenerator 13,
First Electric air valve 14, the second Electric air valve 15, third Electric air valve 16, the 4th Electric air valve 17, the 5th Electric air valve 18, the
Six Electric air valves 19, air duct 20.
Specific embodiment
A preferred embodiment of the invention provides the changeable waste heat recovery type heat pump drying device of one mode, such as
Shown in FIG. 1 to FIG. 3, which includes heat pump system and air treatment system.
Wherein heat pump system includes compressor 2, condenser 3, evaporator 4, supplementary heat exchanger 5, economizer 6, first throttle
Device 7, second throttling device 8 and flow control valve 9；There are two runners for tool in economizer 6.
The connection type of the heat pump system are as follows:
The exhaust outlet of the compressor 2 is connected with the entrance of the flow control valve 9, the air entry of the compressor 2 with
The outlet of the evaporator 4 is connected, and the intermediate puff prot of the compressor 2 is connected with the outlet of the second flow channel of the economizer 6；
The entrance of the condenser 3 is connected with the outlet of the flow control valve 9, the outlet of the condenser 3 with it is described
Supplementary heat exchanger 5 outlet be connected after be divided into two branches respectively with the first runner entrance of the economizer 6 and described second
The entrance of throttling set 8 is connected；
The entrance of the evaporator 4 is connected with the outlet of the first throttling device 7；
The entrance of the supplementary heat exchanger 5 is connected with the Bypass outlet of the flow control valve 9；
The first runner outlet of the economizer 6 is connected with the entrance of the first throttling device 7, the economizer 6
Second flow channel entrance is connected with the outlet of the second throttling device 8；
Air treatment system includes hothouse 1, the first blower 10, the second blower 11, the first regenerator 12, the second regenerator
13, the first Electric air valve 14, the second Electric air valve 15, third Electric air valve 16, the 4th Electric air valve 17, the 5th Electric air valve
18, the 6th Electric air valve 19 and air duct 20 also share condenser 3, evaporator 4 in heat pump system in the system.
The connection type of the air treatment system are as follows:
The condenser 3, evaporator 4, the first blower 10, the second blower 11, the first regenerator 12, the second regenerator 13,
First Electric air valve 14, the second Electric air valve 15, third Electric air valve 16, the 4th Electric air valve 17,18 and of the 5th Electric air valve
6th Electric air valve 19 is installed in air duct 20.Two runners are all had in first regenerator 12 and the second regenerator 13；
Air duct 20 is arranged in a manner of 8-shaped, is divided into multistage and is installed in order to which each equipment connects.The lower section of hothouse 1 is equipped with
Air outlet, top are equipped with discharge outlet, are connected with the both ends in air duct 20 constitute circulation loop respectively.
The first runner entrance of first regenerator 12 is connected by the air duct 20 with 1 discharge outlet of hothouse,
First runner outlet is connected by the air duct 20 with 14 entrance of the first Electric air valve, and the second of first regenerator 12
Flow channel entry point is connected by the air duct 20 with the 4th Electric air valve 17 outlet, and second flow channel exports and passes through the air duct
20 are connected with 1 air outlet of hothouse；
The first runner entrance of second regenerator 13 is connected with first Electric air valve 14 outlet, first-class to say
Mouthful be connected with 4 entrance of evaporator, the second flow channel entrance is exported with the evaporator 4 to be connected, second flow channel export and
First blower, 10 entrance is connected；
The outlet of first blower 10 is connected with 17 entrance of the 4th Electric air valve；
The entrance of second blower 11 is connected with external environment, and outlet is connected with the 5th Electric air valve 18；
Second Electric air valve, 15 side is connected with external environment, and the other side connects first regenerator 12 and described
Air duct 20 among first Electric air valve 14；
16 side of third Electric air valve is connected with external environment, and the other side connects second regenerator 13 and described
Air duct 20 among first Electric air valve 14；
5th Electric air valve, 18 side is connected with second blower 11, and the other side connects first regenerator 12
With the air duct 20 among the 4th Electric air valve 17；
6th Electric air valve, 19 side is connected with external environment, and the other side connects first blower 10 and described the
Air duct 20 among four Electric air valve 17.
The compressor 2 of the present embodiment is air injection enthalpy-increasing vortex frequency-changeable compressor, and the first blower 10 and the second blower 11 are
For frequency conversion fan.
The operation method of the changeable waste heat recovery type heat pump drying device of the one mode of the present embodiment, including enclosed fortune
Row mode, open type dehumidification operating mode and open type not dehumidification operating mode；
In enclosed operational mode:
Compressor 2, the first blower 10 are opened, and the first Electric air valve 14, the 4th Electric air valve 17 are opened；Second blower 11 closes
Machine, the second Electric air valve 15, third Electric air valve 16, the 5th Electric air valve 18, the 6th Electric air valve 19 are closed；In hothouse 1
Air draft enter 4 cool-down dehumidification of evaporator after the first regenerator 12 and the dual waste heat recycling of the second regenerator 13, then pass through
It crosses after condenser 3 heats and is sent into hothouse 1 for drying；
Compressor 2 adjusts revolving speed according to relative air humidity PID in hothouse 1；Flow control valve 9 is according in hothouse 1
Air themperature PID adjusts bypath valve aperture；First blower 10 works in declared working condition；
In open type not dehumidification operating mode:
Compressor 2, the first blower 10, the second blower 11 are opened, the second Electric air valve 15, third Electric air valve the 16, the 5th
Electric air valve 18, the 6th Electric air valve 19 are opened；First Electric air valve 14, the 4th Electric air valve 17 are closed；Outside air is by
Two blowers 11 introduce, and by hydrofuge heating by the exhaust gases in the first regenerator 12, are sent into hothouse 1 after heating using condenser 3 and use
In drying；
Second blower 11 adjusts revolving speed according to relative air humidity PID in hothouse 1；Compressor 2 is according to empty in hothouse 1
Gas temperature PID adjusts revolving speed；
In open type dehumidification operating mode:
Compressor 2, the first blower 10 are opened, and the second Electric air valve 15, third Electric air valve 16, the 4th Electric air valve 17 are beaten
It opens；The shutdown of second blower 11, the first Electric air valve 14, the 5th Electric air valve 18, the 6th Electric air valve 19 are closed；Outside air warp
Enter 4 cooling and dehumidifying of evaporator after crossing the pre-cooling of the second regenerator 13, enters condenser 3 after the preheating of the first regenerator 12 later
Heating is sent into hothouse 1 later and is used for drying；
Compressor 2 adjusts revolving speed according to relative air humidity PID in hothouse 1；Flow control valve 9 is according in hothouse 1
Air themperature PID adjusts bypath valve aperture；First blower 10 works in declared working condition；
The heat pump drying device according to ambient temperature and humidity condition select optimum operation mode: when outdoor air relative humidity compared with
Gao Shi, the vent ratio outdoor air in hothouse 1, which is more suitable, to be recycled, using enclosed operational mode；When outdoor air phase
It, can be with being sent directly into hothouse 1 after heating to outside air, using open type not dehumidification operating mode when lower to humidity；Work as room
When outer relative air humidity is moderate, need to be dehumidified to outside air, heat after be re-fed into hothouse 1, dehumidified and transported using open type
Row mode；
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the scope of protection of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
It is quasi-.
Claims (4)
1. the changeable waste heat recovery type heat pump drying device of one mode, which is characterized in that at heat pump system and air
Reason system；
The heat pump system includes compressor (2), condenser (3), evaporator (4), supplementary heat exchanger (5), economizer (6),
One throttling set (7), second throttling device (8) and flow control valve (9)；
The connection type of the heat pump system are as follows:
The exhaust outlet of the compressor (2) is connected with the entrance of the flow control valve (9), the air entry of the compressor (2)
It is connected with the outlet of the evaporator (4), the intermediate puff prot of the compressor (2) and the second flow channel of the economizer (6)
Outlet is connected；
The entrance of the condenser (3) is connected with the outlet of the flow control valve (9), the outlet of the condenser (3) and institute
State supplementary heat exchanger (5) outlet be connected after be divided into two branches respectively with the first runner entrance of the economizer (6) and institute
The entrance for stating second throttling device (8) is connected；
The entrance of the evaporator (4) is connected with the outlet of the first throttling device (7)；
The entrance of the supplementary heat exchanger (5) is connected with the Bypass outlet of the flow control valve (9)；
The first runner outlet of the economizer (6) is connected with the entrance of the first throttling device (7), the economizer (6)
Second flow channel entrance be connected with the outlet of the second throttling device (8)；
The air treatment system includes hothouse (1), the first blower (10), the second blower (11), the first regenerator (12),
Two regenerators (13), the first Electric air valve (14), the second Electric air valve (15), third Electric air valve (16), the 4th Electric air valve
(17), the 5th Electric air valve (18), the 6th Electric air valve (19) and air duct (20)；
The connection type of the air treatment system are as follows:
The condenser (3), evaporator (4), the first blower (10), the second blower (11), the first regenerator (12), the second backheat
Device (13), the first Electric air valve (14), the second Electric air valve (15), third Electric air valve (16), the 4th Electric air valve (17),
Five Electric air valves (18) and the 6th Electric air valve (19) are installed in the air duct (20)；First regenerator (12) and
Two runners are all had in two regenerators (13)；
The lower section of the hothouse (1) is equipped with air outlet, and top is equipped with discharge outlet, the composition that is connected with the air duct (20) circulation
Circuit；
The first runner entrance of first regenerator (12) passes through the air duct (20) and the hothouse (1) discharge outlet phase
Even, first runner outlet is connected by the air duct (20) with the first Electric air valve (14) entrance, first regenerator
(12) second flow channel entrance is connected by the air duct (20) with the 4th Electric air valve (17) outlet, second flow channel outlet
It is connected with by the air duct (20) with the hothouse (1) air outlet；
The first runner entrance of second regenerator (13) is connected with first Electric air valve (14) outlet, first-class to say
Mouth is connected with the evaporator (4) entrance, and the second flow channel entrance is connected with the evaporator (4) outlet, and second is said
Mouth is connected with the first blower (10) entrance；
The outlet of first blower (10) is connected with the 4th Electric air valve (17) entrance；
The entrance of second blower (11) is connected with external environment, and outlet is connected with the 5th Electric air valve (18)；
Second Electric air valve (15) side is connected with external environment, and the other side connects first regenerator (12) and described
The intermediate air duct (20) of first Electric air valve (14)；
Third Electric air valve (16) side is connected with external environment, and the other side connects second regenerator (13) and described
The intermediate air duct (20) of first Electric air valve (14)；
5th Electric air valve (18) side is connected with second blower (11), and the other side connects first regenerator
(12) and the intermediate air duct (20) of the 4th Electric air valve (17)；
6th Electric air valve (19) side is connected with external environment, and the other side connects first blower (10) and described the
The intermediate air duct (20) of four Electric air valves (17).
2. the changeable waste heat recovery type heat pump drying device of one mode as described in claim 1, which is characterized in that described
Compressor (2) is air injection enthalpy-increasing vortex frequency-changeable compressor.
3. the changeable waste heat recovery type heat pump drying device of one mode as described in claim 1, which is characterized in that described
First blower (10) and the second blower (11) are frequency conversion fan.
4. a kind of operation method of heat pump drying device as described in claim 1, which is characterized in that including enclosed operational mode,
Open type dehumidification operating mode and open type not dehumidification operating mode；
In the enclosed operational mode:
The compressor (2), the first blower (10) are opened, and the first Electric air valve (14), the 4th Electric air valve (17) are opened；Second
Blower (11) shutdown, the second Electric air valve (15), third Electric air valve (16), the 5th Electric air valve (18), the 6th Electric air valve
(19) it closes；
The compressor (2) adjusts revolving speed according to the interior relative air humidity PID of the hothouse (1)；The flow control valve (9)
Bypath valve aperture is adjusted according to the interior air themperature PID of the hothouse (1)；First blower (10) work is in specified work
Condition；
In the open type not dehumidification operating mode:
The compressor (2), the first blower (10), the second blower (11) are opened, the second Electric air valve (15), third Electric air valve
(16), the 5th Electric air valve (18), the 6th Electric air valve (19) are opened；First Electric air valve (14), the 4th Electric air valve (17)
It closes；
Second blower (11) adjusts revolving speed according to the interior relative air humidity PID of the hothouse (1)；The compressor (2)
Revolving speed is adjusted according to the interior air themperature PID of the hothouse (1)；
In the open type dehumidification operating mode:
The compressor (2), the first blower (10) are opened, the second Electric air valve (15), third Electric air valve (16), the 4th electronic
Air-valve (17) is opened；Second blower (11) shutdown, the first Electric air valve (14), the 5th Electric air valve (18), the 6th Electric air valve
(19) it closes；
The compressor (2) adjusts revolving speed according to the interior relative air humidity PID of the hothouse (1)；The flow control valve (9)
Bypath valve aperture is adjusted according to the interior air themperature PID of the hothouse (1)；First blower (10) work is in specified work
Condition.
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| CN201811177636.8A CN109442889B (en) | 2018-10-10 | 2018-10-10 | One mode changeable waste heat recovery type heat pump drying device and its operation method |
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