CN110274443A - Heat pump drying system and heat pump drying unit - Google Patents
Heat pump drying system and heat pump drying unit Download PDFInfo
- Publication number
- CN110274443A CN110274443A CN201910644420.6A CN201910644420A CN110274443A CN 110274443 A CN110274443 A CN 110274443A CN 201910644420 A CN201910644420 A CN 201910644420A CN 110274443 A CN110274443 A CN 110274443A
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- Prior art keywords
- air
- heat pump
- pump drying
- flow control
- control valve
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- 238000001035 drying Methods 0.000 title claims abstract description 72
- 239000003507 refrigerant Substances 0.000 claims abstract description 43
- 238000007791 dehumidification Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000007701 flash-distillation Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Classifications
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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
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
-
- 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
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/02—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in buildings
Landscapes
- 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 invention relates to a heat pump drying system and a heat pump drying unit, wherein the heat pump drying unit comprises: a cabinet including a first heat exchange chamber and a second heat exchange chamber; the dehumidification unit comprises a compressor, a condenser and an inner evaporator which are sequentially connected end to end, wherein the compressor is used for compressing a refrigerant, and the condenser is arranged in the first heat exchange chamber corresponding to the air supply outlet and used for heating air flowing to the air supply outlet; the inner evaporator is arranged in the first heat exchange chamber corresponding to the air return opening and used for condensing and dehumidifying the high-humidity air flowing from the air return opening to the air supply opening; and the moisture exhausting unit is arranged in the second heat exchange chamber, drives the external air to flow into the air supply outlet after being heated by the condenser, and allows the moisture exhausting outlet to be selectively communicated with the air outlet of the drying room. The dehumidification unit that has combined closed loop circulation dehumidification and the dehumidification unit that open circulation hydrofuge among the above-mentioned heat pump drying unit, both can combine the dehumidification, guarantee heat pump drying unit's dehumidification ability, prevent that the humidity in the stoving room is too big and influence the required time of stoving and the stoving quality, improve the stoving effect.
Description
Technical field
The present invention relates to drying technology fields, more particularly to heat pump drying system and heat pump drying unit.
Background technique
Heat pump drying unit is mainly used in the drying that food, medicinal material, timber, agricultural and sideline product, industrial goods wait drying object
Object to be dried is specifically placed in baking room by dehydration, and hot-air is conveyed into baking room by heat pump drying unit,
Constantly circulation takes away the moisture in object to be dried to hot-air in baking room, realizes the purpose of drying.
Generally, air at work, is heated to required temperature by condenser and is sent into baking room by heat pump drying unit
In, the moisture in object to be dried is absorbed by hot-air, and the moisture in circulation air is discharged by the part that dehumidifies, to reach
The purpose of removal moisture drying.But by when dehumidifying part dehumidifying it is possible that hydrofuge not in time the problem of, and then will affect drying
The required time and drying quality, drying effect is bad.
Summary of the invention
Based on this, it is necessary to provide a kind of preferable heat pump drying unit of drying effect.
A kind of heat pump drying unit, comprising:
Casing, including the first Heat Room and the second Heat Room, first Heat Room has to be connected to baking room air inlet
Air outlet and the return air inlet that is connected to baking room air outlet, second Heat Room there is the moisture exhausting port being in communication with the outside；
Dehumidifying element, including the compressor, condenser and interior evaporator being sequentially connected end to end, the compressor is for compressing
Refrigerant, the condenser correspond to the air outlet set on first Heat Room, and heating flows to the air of the air outlet；It is described
Interior evaporator corresponds to the return air inlet set on first Heat Room, to the high humidity sky for flowing to the air outlet by the return air inlet
Gas dehumidification by condensation；And
Hydrofuge unit set on second Heat Room and drives outside air after condenser heating described in inflow
Air outlet, and the moisture exhausting port is allowed selectively to be connected to the baking room air outlet, allow high temperature and humidity air by described
Moisture exhausting port is arranged outwardly.
The Dehumidifying element of closed loop cycle dehumidifying and the hydrofuge list of open loop hydrofuge are combined in above-mentioned heat pump drying unit
Member, the two can guarantee the dehumidifying effect of heat pump drying unit, prevent the humidity in baking room excessive and influence to dry in conjunction with dehumidifying
Required time and drying quality are done, drying effect is improved.Also, hydrofuge unit and Dehumidifying element can share heating air
Condenser keeps the structure of heat pump drying unit relatively simple.
The hydrofuge unit further includes being set to the indoor outer evaporator of second heat exchange in one of the embodiments,
The outer evaporator is connected between the condenser and the gas returning port of the compressor, and is located at and is discharged by the moisture exhausting port
On the hydrofuge path of high temperature and humidity air；
Wherein, the condenser is selectively connected to the interior evaporator and/or the outer evaporator.
The hydrofuge unit further includes fresh air pressure fan and sensible heat exchanger, the fresh air in one of the embodiments,
Pressure fan drives outside air to flow to the condenser along fresh air path, and the sensible heat exchanger is set to the fresh air path and institute
State the infall in hydrofuge path.
The fresh air pressure fan is between the sensible heat exchanger and the condenser in one of the embodiments,
The sensible heat exchanger is between the moisture exhausting port and the outer evaporator.
The Dehumidifying element further includes the first air-valve in one of the embodiments, and first air-valve is set to described the
The return air inlet of one Heat Room, first air-valve selectively open and close the return air inlet；The hydrofuge unit is also
Including the second air-valve, second air-valve is set to the moisture exhausting port, and second air-valve selectively opens and closes the row
Wet mouth.
It in one of the embodiments, further include the flash tank with flash distillation chamber, the outlet of the condenser, the interior steaming
The entrance of the entrance and the outer evaporator of sending out device is connected to the flash distillation chamber.
It is provided on the first passage between the flash tank and the condenser in one of the embodiments, first-class
Control valve is provided with second flow control valve on the second channel between the interior evaporator and the flash tank, described outer
Third flow control valve, the first flow control valve, institute are provided on third channel between evaporator and the flash tank
It states second flow control valve and the third flow control valve selectively opens and closes.
It in one of the embodiments, further include the first controller, if the first flow control valve, the second flow
Control valve and the third flow control valve are opened, and first controller is less than or equal to default in the practical degree of superheat of refrigerant
When the minimum value of range, the aperture for controlling the second flow control valve and the third flow control valve reduces；Described first
Controller controls the second flow control valve when the practical degree of superheat of refrigerant is more than or equal to the maximum value of preset range
And the aperture of the third flow control valve increases.
It in one of the embodiments, further include the tonifying Qi access being connected between the compressor and the flash tank.
It in one of the embodiments, further include second controller and the tonifying Qi switch on the tonifying Qi access；
Wherein, when ambient temperature is less than or equal to preset temperature, the second controller controls the tonifying Qi switch
It opens；When ambient temperature is greater than the preset temperature, the second controller controls the tonifying Qi switch and closes.
It in one of the embodiments, further include set on the low pressure sensor of compressor return air pipe road and set on described
Middle pressure sensor on tonifying Qi access, when the tonifying Qi is switched and opened, if the first pressure that the low pressure sensor detects
The pressure ratio between second pressure that power and medium pressure sensor detect is less than preset value, the second controller control
The aperture of the tonifying Qi switch increases；If the pressure ratio is more than or equal to the preset value, the second controller is in refrigerant
The practical degree of superheat be less than or equal to preset range minimum value when, control the first flow control valve aperture reduce；If institute
Pressure ratio is stated more than or equal to the preset value, the second controller is more than or equal to default in the practical degree of superheat of refrigerant
When the maximum value of range, the aperture for controlling the first flow control valve increases.
The present invention also provides a kind of heat pump drying system, including baking room and above-mentioned heat pump drying unit, the baking rooms
With air inlet and air outlet, the air outlet and the return air inlet of first Heat Room respectively with the institute of the baking room
It states air inlet to be connected to the air outlet, the moisture exhausting port of second Heat Room is selectively and described in the baking room
Air outlet connection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of heat pump drying system in one embodiment of the invention；
Fig. 2 is the schematic illustration of heat pump drying unit in heat pump drying system shown in Fig. 1.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
As shown in Figs. 1-2, in one embodiment of the invention, a kind of heat pump drying unit 100 is provided, baking room 200 is assemblied in
Outside, for the circulation conveying hot wind into baking room 200, to the article dehumidifying drying in baking room 200.
Heat pump drying unit 100 includes casing 10, Dehumidifying element 30 and hydrofuge unit 50, and casing 10 includes the first Heat Room
11 and second Heat Room 13, the first Heat Room 11 there is the air outlet 112 and and baking room being connected to baking room air inlet 210
The return air inlet 114 that air outlet 230 is connected to, the second Heat Room 13 have the moisture exhausting port 132 being in communication with the outside.In this way, by casing 10
Internal space is divided into two regions.
Also, Dehumidifying element 30 includes compressor 32, condenser 34 and the interior evaporator 36 being sequentially connected end to end, compressor
32 are used for compression refrigerant, and the corresponding air outlet 112 of condenser 34 is set to the first Heat Room 11, and heating flows to the air of air outlet 112；
The corresponding return air inlet 114 of interior evaporator 36 is set to the first Heat Room 11, to the highly humid air for flowing to air outlet 112 by return air inlet 114
Dehumidification by condensation.That is, the high temperature and pressure refrigerant that the compression of compressor 32 generates flows into condenser 34, make around condenser 34
Baking room 200 is flowed by air outlet 112 after air heat absorption, high temperature air absorbs the moisture in baking room 200, then from return air inlet
114 return to the first Heat Room 11, and exchange heat condense with the low temperature refrigerant inside indoor evaporator 36 at heat exchanger indoors, high temperature
Attachment of moisture therein reaches desiccant dehumidification in 36 surface of indoor evaporator to remove the moisture in air when air setting
Purpose.
Hydrofuge unit 50 set on the second Heat Room 13 and drives outside air to flow into air outlet after the heating of condenser 34
112, and the moisture exhausting port 132 on the second Heat Room 13 is allowed selectively to be connected to baking room air outlet 230, allow high humidity high temperature
Air by 132 row of moisture exhausting port outwardly.Outside air is under the drive of hydrofuge unit 50 by the condenser in Dehumidifying element 30
34, to generate the hot-air for being sent into baking room 200, and can be by the moisture exhausting port 132 on the second Heat Room 13 by baking room 200
In absorb moisture high temperature and humidity air row outwardly.That is, absorbing fresh air from the external world by hydrofuge unit 50, and will
The moisture in baking room 200 is absorbed after fresh air heating, finally outwardly by the high temperature and humidity air generated in baking room 200 row,
So that outside air is constantly recycled above-mentioned hydrofuge path and achievees the purpose that drying dehumidification to take away the moisture in baking room 200.
In this way, combining the Dehumidifying element 30 and open loop hydrofuge of closed loop cycle dehumidifying in heat pump drying unit 100
Hydrofuge unit 50, the two can guarantee the dehumidifying effect of heat pump drying unit 100, prevent wet in baking room 200 in conjunction with dehumidifying
Time that is big and influencing baking needed and drying quality are spent, drying effect is improved.Also, hydrofuge unit 50 and Dehumidifying element 30
The condenser 34 that heating air can be shared, keeps the structure of heat pump drying unit 100 relatively simple.
Specifically, heat pump drying unit 100 has dehumidification mode, hydrofuge mode and dehumidifying hydrofuge mode, in dehumidification mode
When, Dehumidifying element 30 works, and hydrofuge unit 50 is closed；In hydrofuge mode, Dehumidifying element 30 is closed, and hydrofuge unit 50 works；
When dehumidifying hydrofuge mode, Dehumidifying element 30 and hydrofuge unit 50 work.The specific works mode of heat pump dryer, according to baking
Humidity condition in stove room 200 is selected.When be continuously detected in the first preset duration the current humidity of baking room 200 with
When the difference of default humidity is greater than the first preset difference value, Dehumidifying element 30 is opened, into dehumidification mode；When dehumidification mode operation duration
When more than or equal to the second preset duration, if the difference of the current humidity of baking room 200 and default humidity is greater than the second preset difference value,
Hydrofuge unit 50 is started simultaneously at, into dehumidifying hydrofuge mode.
Further, Dehumidifying element 30 further includes the first air-valve 31, and the first air-valve 31 is set to the return air of the first Heat Room 11
Mouth 114, the first air-valve 31 selectively opens and closes return air inlet 114；Hydrofuge unit 50 further includes the second air-valve 52, the second wind
Valve 52 is set to moisture exhausting port 132, and the second air-valve 52 selectively opens and closes moisture exhausting port 132.In this way, the first air-valve can be passed through
31 selectively open and close return air inlet 114, to open and close dehumidification mode；And it is possible to be selected by the second air-valve 52
Moisture exhausting port 132 is opened and closed, selecting property to open and close hydrofuge mode.Specifically, in dehumidification mode, the first wind is opened
Valve 31 closes the second air-valve 52, is connected to the exhaust outlet of baking room 200 only with return air inlet 114 and the first Heat Room 11, air-flow exists
It is circulated between first Heat Room 11 and baking room 200, and takes the moisture in baking room 200 out of, removed at interior evaporator 36
It is wet.In hydrofuge mode, close the first air-valve 31, open the second air-valve 52, make the exhaust outlet of baking room 200 only with moisture exhausting port
132 and second Heat Room 13 be connected to, enter baking room 200 after the heating of such outside air, and absorb after moisture from moisture exhausting port 132
Row is outwardly.When dehumidifying hydrofuge mode, the first air-valve 31 and the second air-valve 52 are opened, portion of air passes through the first air-valve 31
It is circulated between the first Heat Room 11 and baking room 200, another part air is by the second air-valve 52 in extraneous and drying
It is circulated between room 200.
Hydrofuge unit 50 further includes fresh air pressure fan 54 and sensible heat exchanger 56, and fresh air pressure fan 54 drives outside air edge
Fresh air path flows to condenser 34, with the heat air delivery into baking room 200.Sensible heat exchanger 56 is set to fresh air path and hydrofuge road
The infall of diameter makes the heat for absorbing high temperature and humidity air on hydrofuge path at sensible heat exchanger 56 from the fresh air that the external world flows into
Amount, recycles the heat in the high temperature and humidity gas of discharge, makes full use of the energy, reduces the influence to external environment.Specifically, newly
Wind pressure fan 54 drives outside air to flow to condenser by sensible heat exchanger 56 between sensible heat exchanger 56 and condenser 34
34, it is absorbed heat twice.
Hydrofuge unit 50 further includes the outer evaporator 58 in the second Heat Room 13, and outer evaporator 58 is connected to condenser
Between 34 and the gas returning port of compressor 32, and it is located on the hydrofuge path for the high temperature and humidity air that moisture exhausting port 132 is discharged, condenser
34 are selectively connected to interior evaporator 36 and/or outer evaporator 58.Specifically, it when outdoor temperature is lower than preset temperature, opens
Hydrofuge mode is opened, condenser 34 is connected to outer evaporator 58, and refrigerant flows to outer evaporator 58, high temperature and humidity air by condenser 34
It is flowed to around outer evaporator 58 by moisture exhausting port 132, improves the temperature around outer evaporator 58, guarantee the refrigerant in outer evaporator 58
Gasification can be evaporated, refrigerant evaporation link is prevented to be affected because ambient temperature is too low, guarantees heat pump drying unit 100
Reliability service at low ambient temperatures expands the range of operation of unit.
Further, under dehumidification mode, condenser 34 is connected to interior evaporator 36, so that refrigerant is in condenser 34, interior
It is circulated between evaporator 36 and compressor 32, circulates air between the first Heat Room 11 and baking room 200.?
Under the hydrofuge mode that dehumidifies, condenser 34 is connected to interior evaporator 36 and outer evaporator 58, is divided into two after refrigerant outflow condenser 34
Road flows to interior evaporator 36 and outer evaporator 58 respectively, finally converges in compressor 32.In this way, refrigerant is in outer evaporator 58
When evaporator 36, because the temperature under the action of high temperature and humidity air of discharge of outer evaporator 58 is higher, imitate the evaporation of refrigerant
Rate is higher, improves the heat conversion of refrigerant.
Optionally, sensible heat exchanger 56 is between moisture exhausting port 132 and outer evaporator 58, from the height of the discharge of moisture exhausting port 132
Warm high humidity gas into after crossing sensible heat exchanger 56 and new air heat-exchange, continue to flow to outer evaporator 58 make the temperature of outer evaporator 58 compared with
Height after the heat in high temperature and humidity gas is so absorbed and utilized twice, then is outwardly discharged, and improves energy utilization rate.
Heat pump drying unit 100 further includes the flash tank 70 with flash distillation chamber, the outlet of condenser 34, interior evaporator 36
The entrance of entrance and outer evaporator 58 is connected to flash distillation chamber.In this way, condenser 34 by flash tank 70 and interior evaporator 36 and
Outer evaporator 58 is connected to.
Specifically, first flow control valve 72, interior steaming are provided on the first passage between flash tank 70 and condenser 34
Be provided with second flow control valve 74 on second channel between hair device 36 and flash tank 70, outer evaporator 58 and flash tank 70 it
Between third channel on be provided with third flow control valve 76, first flow control valve 72, second flow control valve 74 and third
Flow control valve 76 selectively opens and closes.In this way, can control by first flow control valve 72 by condenser 34
The flow for flowing into refrigerant in flash tank 70, can control by second flow control valve 74 and flows into interior evaporator 36 by flash tank 70
The flow of middle refrigerant can control the stream that refrigerant in outer evaporator 58 is flowed by flash tank 70 by third flow control valve 76
Amount.Also, when second flow control valve 74 is opened, and third flow control valve 76 is closed, condenser 34 and interior evaporator 36 connect
It is logical；When second flow control valve 74 is closed, and third flow control valve 76 is opened, condenser 34 is connected to outer evaporator 58；When
When second flow control valve 74 is opened, third flow control valve 76 is opened, condenser 34 and interior evaporator 36 and outer evaporator 58
Connection.
Heat pump drying unit 100 further includes the first controller, if first flow control valve 72, second flow control valve 74 and
Third flow control valve 76 is opened, that is, when being in dehumidifying hydrofuge mode, the first controller is less than in the practical degree of superheat of refrigerant
Equal to preset range minimum value when, the aperture for controlling second flow control valve 74 and third flow control valve 76 reduces.At this time
The degree of superheat is smaller, illustrates that the amount of refrigerant is more, can suitably reduce the flow that refrigerant flows to interior heat exchanger and external heat exchanger, make cold
The flow of matchmaker is moderate, keeps the hot air temperature for flowing to baking room 200 heated by heat pump drying unit 100 relatively stable, keeps away
There is fluctuation in the temperature exempted from baking room 200.First controller is more than or equal to preset range in the practical degree of superheat of refrigerant
Maximum value when, the aperture for controlling second flow control valve 74 and third flow control valve 76 increases.The degree of superheat is larger at this time, says
The amount of bright refrigerant is less, can suitably increase the flow that refrigerant flows to interior heat exchanger and external heat exchanger, keep the flow of refrigerant moderate,
Keep the hot air temperature for flowing to baking room 200 heated by heat pump drying unit 100 relatively stable, avoids in baking room 200
Temperature there is fluctuation.
Heat pump drying unit 100 further includes the tonifying Qi access 80 being connected between compressor 32 and flash tank 70, refrigerant into
It is reduced suddenly after entering flash tank 70 because of pressure, a part of refrigerant can become gaseous state, as cold medium shortage Shi Ketong in compressor 32
It crosses tonifying Qi access 80 and the gaseous coolant in flash tank 70 is passed through 32 tonifying Qi of compressor, make compressor 32 can be with reliability service.Tool
Body, when ambient temperature is lower, the compression ratio of compressor 32 increases, and needs more refrigerants to carry out compression circulation, at this time may be used
By the tonifying Qi into compressor 32 of tonifying Qi access 80, increase compressor 32, also with operation, by compressor 32 in low temperature environment
Range of operation reduces delivery temperature.
Further, heat pump drying unit 100 further includes second controller and the tonifying Qi switch on tonifying Qi access 80
82；Wherein, when ambient temperature is less than or equal to preset temperature, second controller controls tonifying Qi switch 82 and opens, to compression
32 Gas-supplying enthalpy-increasing of machine increases the range of operation of compressor 32, and making compressor 32 at low ambient temperatures can still compress out enough
Refrigerant；When ambient temperature is greater than preset temperature, second controller controls tonifying Qi switch 82 and closes, and compressor 32 is not required to
Want tonifying Qi.
Further, heat pump drying unit 100 further include set on compressor return air pipe road low pressure sensor 81 with
And the middle pressure sensor 83 on tonifying Qi access 80, when tonifying Qi switch 82 is opened, if low pressure sensor 81 detect the
The pressure ratio between second pressure that one pressure and middle pressure sensor 83 detect is less than preset value, and second controller control is mended
The aperture of air cock 82 increases, and prevents the aperture of tonifying Qi switch 82 smaller and so that refrigerant is flowed through rear crushing larger, flows through refrigerant
Compressor 32 is entered with larger pressure after the tonifying Qi switch 82 that aperture is sent to.If pressure ratio is greater than preset value, according to refrigerant
The degree of superheat adjust first flow valve.Second controller is less than or equal to the minimum value of preset range in the practical degree of superheat of refrigerant
When, the aperture of control first flow control valve 72 reduces, to reduce cold medium flux.The practical degree of superheat of the second controller in refrigerant
More than or equal to preset range maximum value when, control first flow control valve 72 aperture increase, to increase cold medium flux, guarantee
There are enough refrigerants to participate in circulation.In this way, keeping the flow of refrigerant moderate, make to dry by the flow direction that heat pump drying unit 100 heats
The hot air temperature of stove room 200 is relatively stable, and the temperature in baking room 200 is avoided fluctuation occur.
In one embodiment of the invention, a kind of heat pump drying system, including baking room 200 and above-mentioned heat pump dryer are also provided
Group 100, baking room 200 have air inlet and air outlet, the air outlet 112 and return air inlet 114 of the first Heat Room 11 respectively with baking
The air inlet of stove room 200 is connected to air outlet, to bypass air through the air outlet after condenser 34 heats from the first Heat Room 11
112 flow to the air inlet of baking room 200, then the return air inlet 114 of the first Heat Room 11 is flowed to from the air outlet of baking room 200, most
Air outlet 112 is returned to after return air inlet 114 is by interior 36 dehumidification by condensation of evaporator afterwards, makes air in the first Heat Room 11 and drying
Repetitive cycling between room 200 takes away the moisture in baking room 200.
Also, the moisture exhausting port 132 of the second Heat Room 13 is selectively connected to the air outlet of baking room 200, works as moisture exhausting port
132 with the air outlet of baking room 200 when being connected to, and the high temperature and humidity air in baking room 200 can also be outside by 132 row of moisture exhausting port
Boundary's environment.In this way, both can also pass through row by the interior evaporator 36 in the first Heat Room 11 to high temperature and humidity air dewetting
High temperature and humidity air is discharged in wet mouth 132, and the mode for removing moisture in baking room 200 is more, can dehumidify in time, improves dryness
Energy.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (12)
1. a kind of heat pump drying unit (100) characterized by comprising
Casing (10), including the first Heat Room (11) and the second Heat Room (13), first Heat Room (11) have and drying
The air outlet (112) of room air inlet (210) connection and the return air inlet (114) that is connected to baking room air outlet (230), described the
Two Heat Rooms (13) have the moisture exhausting port (132) being in communication with the outside；
Dehumidifying element (30), including the compressor (32), condenser (34) and interior evaporator (36) being sequentially connected end to end, the pressure
Contracting machine (32) is used for compression refrigerant, and the corresponding air outlet (112) of the condenser (34) is set to first Heat Room (11),
Heating flows to the air of the air outlet (112)；The corresponding return air inlet (114) of the interior evaporator (36) is set to described first
Heat Room (11), to the highly humid air dehumidification by condensation for flowing to the air outlet (112) by the return air inlet (114)；And
Hydrofuge unit (50) is set to second Heat Room (13) and drives outside air after the condenser (34) heating
The air outlet (112) are flowed into, and the moisture exhausting port (132) is allowed selectively to be connected to the baking room air outlet (230),
High temperature and humidity air is allowed to be arranged outwardly by the moisture exhausting port (132).
2. heat pump drying unit (100) according to claim 1, which is characterized in that the hydrofuge unit (50) further includes
Outer evaporator (58) in second Heat Room (13), the outer evaporator (58) be connected to the condenser (34) with
Between the gas returning port of the compressor (32), and it is located at the hydrofuge road for the high temperature and humidity air being discharged by the moisture exhausting port (132)
On diameter；
Wherein, the condenser (34) is selectively connected to the interior evaporator (36) and/or the outer evaporator (58).
3. heat pump drying unit (100) according to claim 2, which is characterized in that the hydrofuge unit (50) further includes
Fresh air pressure fan (54) and sensible heat exchanger (56), the fresh air pressure fan (54) drive outside air to flow to institute along fresh air path
It states condenser (34), the sensible heat exchanger (56) is set to the infall in the fresh air path and the hydrofuge path.
4. heat pump drying unit (100) according to claim 3, which is characterized in that the fresh air pressure fan (54) is located at
Between the sensible heat exchanger (56) and the condenser (34), the sensible heat exchanger (56) is located at the moisture exhausting port (132)
Between the outer evaporator (58).
5. heat pump drying unit (100) according to any one of claims 1-4, which is characterized in that the Dehumidifying element
It (30) further include the first air-valve (31), first air-valve (31) is set to the return air inlet of first Heat Room (11)
(114), first air-valve (31) selectively opens and closes the return air inlet (114)；The hydrofuge unit (50) is also wrapped
It includes the second air-valve (52), second air-valve (52) is set to the moisture exhausting port (132), and second air-valve (52) is selectively beaten
The open and close moisture exhausting port (132).
6. heat pump drying unit (100) according to claim 2, which is characterized in that further include the flash distillation with flash distillation chamber
The entrance of tank (70), the outlet of the condenser (34), the entrance of the interior evaporator (36) and the outer evaporator (58) is equal
It is connected to the flash distillation chamber.
7. heat pump drying unit (100) according to claim 6, which is characterized in that the flash tank (70) with it is described cold
It is provided on first passage between condenser (34) first flow control valve (72), the interior evaporator (36) and the flash tank
(70) it is provided on the second channel between second flow control valve (74), the outer evaporator (58) and the flash tank (70)
Between third channel on be provided with third flow control valve (76), the first flow control valve (72), the second flow
Control valve (74) and the third flow control valve (76) selectively open and close.
8. heat pump drying unit (100) according to claim 7, which is characterized in that it further include the first controller, if described
Flow control valve (72), the second flow control valve (74) and the third flow control valve (76) are opened, and described
One controller controls the second flow control valve when the practical degree of superheat of refrigerant is less than or equal to the minimum value of preset range
(74) and the aperture of the third flow control valve (76) reduces；First controller is big in the practical degree of superheat of refrigerant
When being equal to the maximum value of preset range, the second flow control valve (74) and the third flow control valve (76) are controlled
Aperture increases.
9. heat pump drying unit (100) according to claim 7, which is characterized in that further include being connected to the compressor
(32) the tonifying Qi access (80) between the flash tank (70).
10. heat pump drying unit (100) according to claim 9, which is characterized in that further include second controller and be set to
Tonifying Qi on the tonifying Qi access (80) switchs (82)；
Wherein, when ambient temperature is less than or equal to preset temperature, the second controller controls the tonifying Qi switch (82)
It opens；When ambient temperature is greater than the preset temperature, the second controller controls the tonifying Qi switch (82) and closes.
11. heat pump drying unit (100) according to claim 10, which is characterized in that further include being set to compressor (32)
Low pressure sensor (81) in return line and the middle pressure sensor (83) on the tonifying Qi access (80), in the benefit
When air cock (82) is opened, if first pressure and medium pressure sensor (83) that the low pressure sensor (81) detection obtains are examined
The pressure ratio between second pressure measured is less than preset value, and the second controller controls opening for the tonifying Qi switch (82)
Degree increases；If the pressure ratio is more than or equal to the preset value, the second controller is less than in the practical degree of superheat of refrigerant
Equal to preset range minimum value when, control the first flow control valve (72) aperture reduce；If the pressure ratio is big
In being equal to the preset value, the second controller is more than or equal to the maximum value of preset range in the practical degree of superheat of refrigerant
When, the aperture for controlling the first flow control valve (72) increases.
12. a kind of heat pump drying system, which is characterized in that including baking room (200) and the claims 1-11 any one
The heat pump drying unit (100), the baking room (200) have air inlet and air outlet, first Heat Room (11)
The air outlet (112) and the return air inlet (114) respectively with the air inlet of the baking room (200) and the outlet air
Mouth connection, the selectively outlet air with the baking room (200) of the moisture exhausting port (132) of second Heat Room (13)
Mouth connection.
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| CN110864506A (en) * | 2019-12-25 | 2020-03-06 | 浙江柿子新能源科技有限公司 | Heating and dehumidifying function integrated drying room and working method thereof |
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| CN110926198A (en) * | 2019-11-07 | 2020-03-27 | 珠海格力电器股份有限公司 | Heat pump drying system, drying method, device and controller |
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| CN110887347B (en) * | 2019-11-26 | 2020-09-15 | 珠海格力电器股份有限公司 | Drying method and drying system |
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| CN112556331A (en) * | 2020-12-22 | 2021-03-26 | 广西南宁墨子新能源有限公司 | Full-air-inlet and full-moisture-discharging efficient heat pump dryer and drying method |
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| CN113475733A (en) * | 2021-06-23 | 2021-10-08 | 青岛海尔空调电子有限公司 | Method and device for drying tobacco and drying equipment |
| CN113983725A (en) * | 2021-11-01 | 2022-01-28 | 深圳麦克维尔空调有限公司 | Drying chamber regulation and control system |
| CN113983725B (en) * | 2021-11-01 | 2024-02-23 | 深圳麦克维尔空调有限公司 | Drying chamber regulation and control system |
| CN115523748A (en) * | 2022-08-09 | 2022-12-27 | 青岛海尔空调器有限总公司 | Heat pump dryer control method and device based on return air inlet temperature |
| CN115523748B (en) * | 2022-08-09 | 2023-12-19 | 青岛海尔空调器有限总公司 | Control method and device for heat pump dryer based on return air inlet temperature |
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