CN104913538B - A kind of greenhouse temperature regulating system and its adjusting method - Google Patents
A kind of greenhouse temperature regulating system and its adjusting method Download PDFInfo
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- CN104913538B CN104913538B CN201510213671.0A CN201510213671A CN104913538B CN 104913538 B CN104913538 B CN 104913538B CN 201510213671 A CN201510213671 A CN 201510213671A CN 104913538 B CN104913538 B CN 104913538B
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- heat exchanger
- heat
- liquid storage
- storage pool
- temperature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/246—Air-conditioning systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
Abstract
The present invention relates to chamber planting technical fields, disclose a kind of greenhouse temperature regulating system.The greenhouse temperature regulating system includes compressor, four-way reversing valve, finned heat exchanger, expansion valve, double-tube heat exchanger, surface cooler, circulating pump and liquid storage pool；The compressor is sequentially connected respectively with described sleeve pipe heat exchanger, expansion valve, finned heat exchanger by the four-way reversing valve and constitutes heat pump cycle unit, described finned heat exchanger one end is provided with centrifugal blower, the other end is connect with the surface cooler, one end of described sleeve pipe heat exchanger and surface cooler is connected to the circulating pump respectively, the other end is connected to the liquid storage pool respectively, and the circulating pump is connected to the liquid storage pool.The heat pump cycle unit thermal-arrest is utilized in temperature regulating system in greenhouse provided by the invention, it is radiated using the surface cooler and heat pump cycle unit, collecting efficiency can be promoted and extend the thermal-arrest time, the utilization rate for air heat energy of having more than needed in heliogreenhouse, stable and reliable operation can be greatly improved.
Description
Technical field
The present invention relates to chamber planting technical field more particularly to a kind of greenhouse temperature regulating systems, particularly a kind of
The greenhouse temperature regulating system and its adjusting method of air heat energy utilization ratio in heliogreenhouse can be improved.
Background technology
Chinese heliogreenhouse is the generation of energy saving, efficient, inexpensive greenhouse structure pattern using solar radiation as main energy sources
Table.By the end of the year 2012, national heliogreenhouse area is 96.4 ten thousand hectares, accounts for about the 24.9% of the facility cultivation gross area.Due to
Heliogreenhouse has excellent thermal isolation and heat storage performance, and between China north latitude 35-degree~42 °, winter generally can be into without heating
The production of row warm season vegetable.However, for using time more long heliogreenhouse, or in extremely frigid zones, or extreme weather is met with,
Or when for seedling breeding, the production of flowers and plants, heliogreenhouse only absorbs solar radiant energy by own structure can not be complete
Full up foot crop demand, Low Night Temperature damage to plants caused by sudden drop in temperature and high humidity environment caused by pest and disease damage take place frequently, seriously affect crop yield and product
Matter.Therefore, in conjunction with heliogreenhouse Photothermal characterisation, the heating method for seeking low-carbon energy-saving resists Low Night Temperature to promote heliogreenhouse
Ability have become a top priority.
High noon and afternoon indoor air temperature are higher in winter for heliogreenhouse, reach as high as 35 DEG C or more, higher than plant growth
Preference temperature, such as common chamber crop cucumber are 25~28 DEG C in germination period, Seedling Stage, the optimum temperature of solid picking time.
As it can be seen that heliogreenhouse heat on daytime is more than needed, and surplus heat accounts for about greenhouse whole day and obtains hot 80%.By heat of having more than needed in daytime greenhouse
Amount, which is collected, have been studied for night heating and reports various modes, as water curtain actively store thermal desorption system, in heat exchange
System, air-wall heat-exchange system, greenhouse component thermal-arrest etc..Above system or device breach heliogreenhouse and only rely on wall
The single-mode of body and the passive accumulation of heat of soil, it is controllable to realize greenhouse thermal-arrest, exothermic process, improves daylight to a certain extent
Greenhouse nocturnal temperature.But to greenhouse air thermal energy using be mostly by the heat convection of air dielectric and heat-storage medium carry out or
It is affected by it larger, it is desirable that there is certain temperature difference between the two, but the trend of heat transfer process is that the medium temperature difference is gradually reduced, even
There is the case where heat-storage medium temperature is more than air dielectric, therefore cause system collecting efficiency low, effective thermal-arrest time is short, generally
It there is a problem that greenhouse air utilization rate of waste heat is low.
Air source heat pump can obtain the air heat energy of environment middle-low grade, do work through electric power, provide workable high-grade
Thermal energy, it is easy to use since mounting cost is low, it has also become the one kind being most widely used in many patterns of heat pump.But air-source
Being affected using climate condition for heat pump, can not work normally in northern China cold district winter, is mainly shown as heat
Heat pump heating amount cannot be satisfied greenhouse heating load less, and coefficient of performance in heating is low, and defrosting accuracy is poor.
In view of the defect of the above-mentioned prior art, it is desirable to provide one kind can improve air heat energy utilization ratio in heliogreenhouse
Greenhouse temperature regulating system and its adjusting method.
Invention content
(1) technical problems to be solved
The technical problem to be solved by the present invention is to the existing greenhouse temperature regulating systems using surplus heat in greenhouse to be mostly
By the heat convection of air dielectric and heat-storage medium carry out or be affected by it is larger, but the trend of Convective Heat Transfer be situated between
The matter temperature difference is gradually reduced, or even the case where heat-storage medium temperature is more than air dielectric occurs, therefore causes system collecting efficiency low,
Effective thermal-arrest time is short, there is a problem of that greenhouse air utilization rate of waste heat is low.And the application climate condition shadow of air source heat pump
Sound is larger, can not work normally in cold district winter, is primarily present heat pump heating capacity and cannot be satisfied greenhouse heating load less, makes
Thermal property coefficient is low, the problem for the accuracy difference that defrosts.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of greenhouse temperature regulating systems, wherein including compression
Machine, four-way reversing valve, finned heat exchanger, expansion valve, double-tube heat exchanger, surface cooler, circulating pump and liquid storage pool；The compressor warp
It crosses the four-way reversing valve and is sequentially connected composition heat pump cycle list with described sleeve pipe heat exchanger, expansion valve, finned heat exchanger respectively
Member, described finned heat exchanger one end are provided with centrifugal blower, and the other end is connect with the surface cooler, described sleeve pipe heat exchanger and table
One end of cooler is connected to the circulating pump respectively, and the other end is connected to the liquid storage pool respectively, the circulating pump and the storage
Liquid pool is connected to.
Further, further include the electrical heating being connect with the surface cooler.
Further, further include the plenum chamber for being provided with air hose.
Further, the air hose is cloth bag air hose, and the air hose is provided with single row of holes or multiple rows of hole, every when opening two rounds
The angle all same in hole and vertical direction described in one row.
Further, the first solenoid valve, the cycle are provided on the pipeline that the circulating pump is connected to the surface cooler
It pumps and is provided with second solenoid valve on the pipeline being connected to described sleeve pipe heat exchanger.
Further, the electrical heating is finned electrical heating, and heats power is less than the system of the heat pump cycle unit
Thermal power.
Further, the preferred armored concrete of the agent structure of the liquid storage pool pours or fiberglass, the liquid storage pool
It is provided on lateral wall for heat-insulated styrofoam.
Further, non-return is both provided on the pipeline that described sleeve pipe heat exchanger and surface cooler are connected to the liquid storage pool
Valve.
Further, it is provided with filter between described sleeve pipe heat exchanger and the expansion valve.
The present invention also provides the sides that greenhouse temperature is adjusted in a kind of application temperature regulating system in greenhouse as described above
Method, wherein the specific steps are：
S1, thermal-arrest room temperature is set as T1, when greenhouse temperature t is more than T1, refrigerant is driven through institute by the compressor 1
It states finned heat exchanger 3 and absorbs air heat energy, after the compression of the compressor 1, flow through described sleeve pipe heat exchanger 6 and driven with circulating pump 14
Dynamic fluid media (medium) heat exchange, by heat storage in the liquid storage pool 16, is most again introduced into the fin through the expansion valve 4 afterwards
Heat exchanger 3 forms cycle, completes collection thermal process；
Heat release room temperature is set as T2, when greenhouse temperature t is less than T2, the fluid media (medium) in the liquid storage pool 16 is followed described
The heat dissipation of the surface cooler 8 is flowed through under 14 driving of ring pump, completes exothermic process, when the temperature of fluid medium drop in the liquid storage pool 16
When down to T2, into next step；
S2, when greenhouse temperature t is not up to T2, heat pump cycle unit connection, inverted running carries out pressure heat release.
(3) advantageous effect
The above-mentioned technical proposal of the present invention has the following advantages that：Compressor in temperature regulating system in greenhouse provided by the invention
It is sequentially connected respectively with double-tube heat exchanger, expansion valve, finned heat exchanger by four-way reversing valve and constitutes heat pump cycle unit, fin
Heat exchanger one end is provided with centrifugal blower, and the other end is connect with surface cooler, one end of double-tube heat exchanger and surface cooler respectively with follow
Ring pump connection, the other end are connected to liquid storage pool respectively, and circulating pump is connected to liquid storage pool.Greenhouse temperature provided by the invention adjusts system
The heat pump cycle unit thermal-arrest is utilized in system, is radiated using the surface cooler and heat pump cycle unit, can be promoted collection thermal effect
Rate simultaneously extends the thermal-arrest time, can greatly improve the utilization rate for air heat energy of having more than needed in heliogreenhouse, realizes that heliogreenhouse heat exists
Time and transfer spatially have significant heating and effect on moisture extraction, can effectively prevent crop chilling injury and high humidity
Pest and disease damage caused by environment, and it is easily installed construction, stable and reliable operation, energy-saving effect is notable, has lower operating cost.
Description of the drawings
Fig. 1 is the connection diagram of greenhouse of embodiment of the present invention temperature regulating system；
Fig. 2 is the structure schematic diagram of greenhouse of embodiment of the present invention temperature regulating system；
Fig. 3 is the positive structure schematic of greenhouse of embodiment of the present invention temperature regulating system；
Fig. 4 is the Experimental Comparison figure of greenhouse of embodiment of the present invention temperature regulating system.
In figure：1：Compressor；2：Four-way reversing valve；3：Finned heat exchanger；4：Expansion valve； 5：Filter；6：Sleeve heat exchange
Device；7：Centrifugal blower；8：Surface cooler；9：Electrical heating； 10：Plenum chamber；11：Air hose；12：First solenoid valve；13：Second electromagnetism
Valve；14：Circulating pump；15：Check-valves；16：Liquid storage pool；17：Shell；18：Control mechanism.
Specific implementation mode
In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more；Term "upper",
The orientation or positional relationship of the instructions such as "lower", "left", "right", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
It is merely for convenience of description of the present invention and simplification of the description, not indicating or implying the indicated machine or element must have specifically
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting 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
Can also be electrical connection to be mechanical connection；It can be directly connected, it can also be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The specific implementation mode of the present invention is described in further detail with reference to the accompanying drawings and examples.Following embodiment
For illustrating the present invention, but it is not limited to the scope of the present invention.
As shown in Figures 1 to 4, temperature regulating system in greenhouse provided in an embodiment of the present invention includes compressor 1, four-way commutation
Valve 2, finned heat exchanger 3, expansion valve 4, double-tube heat exchanger 6, surface cooler 8, circulating pump 14 and liquid storage pool 16；The compressor 1 passes through
Cross the four-way reversing valve 2 be sequentially connected respectively with described sleeve pipe heat exchanger 6, expansion valve 4, finned heat exchanger 3 constitute heat pump follow
Ring element, 3 one end of the finned heat exchanger are provided with centrifugal blower 7, and the other end is connect with the surface cooler 8, and described sleeve pipe is changed
One end of hot device 6 and surface cooler 8 is connected to the circulating pump 14 respectively, and the other end is connected to the liquid storage pool 16 respectively, described
Circulating pump 14 is connected to the liquid storage pool 16.
Compressor 1 is sequentially connected four-way reversing valve 2, double-tube heat exchanger 6, filter 5, expansion valve 4, fin by copper pipe
Heat exchanger 3, then four-way reversing valve 2, compressor 1 are connected back to by copper pipe, heat pump cycle circuit is formed, refrigerant is by compressor 1
Driving, in the loop by circulating clockwise or counterclockwise, flow direction decision systems operating condition；Circulating pump 14 is logical
Fluid media (medium) in liquid storage pool 16 is imported 6 outer tube of double-tube heat exchanger by piping, then leads back to liquid storage pool 16 through pipeline；Circulating pump
Fluid media (medium) in liquid storage pool 16 is imported surface cooler 8 by 14 by pipeline, then leads back to liquid storage pool 16 through pipeline.
Four-way reversing valve 2 changes system condition for reasonably switching heat pump cycle refrigerant flow direction, daytime fin
Heat exchanger 3 makees evaporator, exchanges heat with room air, and draw air thermal energy, double-tube heat exchanger 6 makees condenser, is driven with circulating pump 14
Dynamic fluid media (medium) heat exchange, by heat storage in liquid storage pool 16；Night double-tube heat exchanger 6 does evaporator, draw fluid medium
Heat, finned heat exchanger 3 are made condenser, are rejected heat in room air.The surface cooler 8 is the heat release preferentially selected
Component can be directly by the combination of centrifugal blower 7 and surface cooler 8 with convection current when temperature of fluid medium is higher in liquid storage pool 16
The form heat release of heat exchange, when fluid media (medium) is down to certain temperature and enables heat pump cycle heat release again in liquid storage pool 16, this contribute to be
It unites energy saving.
Temperature regulating system in greenhouse provided by the present invention, it is cold using the table using the heat pump cycle unit thermal-arrest
Device 8 and the heat dissipation of heat pump cycle unit, can promote collecting efficiency and extend the thermal-arrest time, can greatly improve in heliogreenhouse and have more than needed
The utilization rate of air heat energy realizes the transfer of heliogreenhouse heat over time and space, has significant heating and dehumidifying effect
Fruit can effectively prevent pest and disease damage caused by crop chilling injury and high humidity environment.Meanwhile the present invention can also reduce daytime day
The indoor temperature of light temperature is simultaneously dehumidified by cooling condensation.In addition, system can cause indoor air circulation in thermal-arrest, exothermic process
Flowing, is conducive to plant growth.
Energy of the present invention for Solar Greenhouse in Winter heating is mainly derived from the air heat energy that solar energy derives, and belongs to
Clean reproducible energy.The special photo-thermal environment of heliogreenhouse provides ideal heat source for system thermal-arrest, thermal-arrest stage COP compared with
Greatly, and night elder generation's surface cooler heat release, rear heat pump cycle unit force exothermic integrated mode also to reduce energy consumption to the greatest extent,
In addition collection, exothermic process system are in heating condition always, therefore system has larger COP values, energy saving effect in the heating period
Fruit is notable, cleans no pollution.
Device height according to the present invention is integrated, is easily installed construction, and stable and reliable operation has lower operation
Cost, not only Solar Greenhouse in Winter heating provide new way, have also widened the application development field of air source heat pump.
Preferably, the present embodiment further includes the electrical heating 9 being connect with surface cooler 8, and the surface cooler 8 and electrical heating 9 are successively
It is connect with the finned heat exchanger 3.Centrifugal blower 7 can be blown to finned heat exchanger 3, surface cooler 8 and electrical heating 9 successively.Static pressure
Case 10 is set on shell 17, further includes the plenum chamber 10 for being provided with air hose 11.The preferably finned electrical heating of the electrical heating 9,
For successive cloudy days and the emergent heating of extreme weather, prevent crop from damaging to plants caused by sudden drop in temperature i.e. as long as can certain temperature be maintained indoor air temperature
Can, heats power should be less than the specified heats power of heat pump cycle, ratio preferably 1/2.The air hose 11 is cloth bag air hose, the wind
Pipe 11 is provided with single row of holes or multiple rows of hole, the angle all same in hole and vertical direction described in each row when opening two rounds.In greenhouse
Portion's humid air enters plenum chamber 10 by finned heat exchanger 3, surface cooler 8, electrical heating 9 successively under the driving of centrifugal blower 7,
Air hose 11 by connecting plenum chamber 10 is discharged in greenhouse again.The plenum chamber 10 is mainly used for balancing wind pressure, reduces simultaneously
7 air draft noise of centrifugal blower, connect with air hose 11.
Preferably, the first solenoid valve 12 is provided on the pipeline that the circulating pump 14 is connected to the surface cooler 8, it is described to follow
It is provided with second solenoid valve 13 on the pipeline that ring pump 14 is connected to described sleeve pipe heat exchanger 6.The electrical heating 9 is that finned electricity adds
Heat, heats power are less than the heats power of the heat pump cycle unit.First solenoid valve 12 and second solenoid valve 13 are used
In the flow path of control fluid media (medium) in the duct liquid is stored when the first solenoid valve 12 is opened, second solenoid valve 13 is closed
Fluid media (medium) in pond 16 flows through surface cooler 8 by pipeline, exchanges heat with the room air that centrifugal blower 7 drives；When the first electromagnetism
When valve 12 is closed, second solenoid valve 13 is opened, the fluid media (medium) in liquid storage pool 16 flows through 6 outer tube of double-tube heat exchanger by pipeline,
The refrigerant heat exchanger driven with compressor 1.
Preferably, non-return is both provided on the pipeline that described sleeve pipe heat exchanger 6 and surface cooler 8 are connected to the liquid storage pool 16
Valve 15.Filter 5 is provided between described sleeve pipe heat exchanger 6 and the expansion valve 4.When a solenoid valve is in the open state,
Fluid media (medium) under the check-valves 15 is used to prevent circulating pump 14 from driving falls to rush another solenoid valve under closed state.
The preferred armored concrete of agent structure of the liquid storage pool 16 pours or fiberglass, is arranged on the lateral wall of the liquid storage pool 16
It is useful for heat-insulated styrofoam.1 preferred vortex of compressor, input power by greenhouse, geographical location, production purposes,
The factors such as greenhouse heating load and surplus heat on daytime codetermine, preferred with reference to the heating COP values used in calculating process
3.5。
Fluid media (medium) described in the present embodiment is the larger liquid of specific heat, preferably water, water has convenient, low cost and nothing
The advantages of pollution.Wherein, the liquid storage pool 16 should have thermal and insulating performance, and the preferred armored concrete of agent structure pours or glass
Glass steel, the preferred styrofoam of heat-barrier material；16 volume of liquid storage pool is by factors such as greenhouse winter Heating Load, system collection exothermicities
It codetermines, to avoid occupying planting space, liquid storage pool 16 is preferably embedded into underground.
The present invention also provides the sides that greenhouse temperature is adjusted in a kind of application temperature regulating system in greenhouse as described above
Method, wherein the specific steps are：S1, thermal-arrest room temperature is set as T1, when greenhouse temperature t is more than T1, refrigerant is by the compressor
1, which is driven through the finned heat exchanger 3, absorbs air heat energy, after the compression of the compressor 1, flows through described sleeve pipe heat exchanger 6
With circulating pump 14 drive fluid media (medium) exchange heat, by heat storage in the liquid storage pool 16, most afterwards through the expansion valve 4 again
It is formed and is recycled into the finned heat exchanger 3, complete collection thermal process；
Heat release room temperature is set as T2, when greenhouse temperature t is less than T2, the fluid media (medium) in the liquid storage pool 16 is followed described
The heat dissipation of the surface cooler 8 is flowed through under 14 driving of ring pump, completes exothermic process, when the temperature of fluid medium drop in the liquid storage pool 16
When down to T2, into next step；
S2, when greenhouse temperature t is not up to T2, heat pump cycle unit connection, inverted running carries out pressure heat release.
Temperature regulating system in greenhouse provided by the invention in use,
(1), daytime in winter, when heliogreenhouse indoor air temperature rises to certain temperature, start compressor 1, centrifugal blower 7,
Circulating pump 14 closes the first solenoid valve 12, opens second solenoid valve 13, system operation thermal-arrest, when indoor air temperature is reduced to centainly
It is out of service when value.In the thermal-arrest stage, under the driving of compressor 1, refrigerant absorbs air heat energy by finned heat exchanger 3, by low
Warm low pressure liquid becomes low temperature low pressure gas, becomes the gas of high temperature and pressure after the compression of compressor 1, then flows through sleeve heat exchange
Device 6 exchanges heat with the fluid media (medium) that circulating pump 14 drives, and is condensed into high temperature high pressure liquid, and by heat storage in liquid storage pool 16,
The expanded decompression of valve 4 of high temperature high pressure liquid becomes low temperature and low pressure liquid and reenters the formation cycle of finned heat exchanger 3.This stage,
Finned heat exchanger 3 is evaporator, and double-tube heat exchanger 6 is condenser, and system pumping air heat energy is stored in liquid storage pool 16, stores liquid
16 temperature of fluid medium of pond increases steadily.
(2), night starts centrifugal blower 7 and circulating pump 14 when indoor air temperature is reduced to certain temperature, opens simultaneously the
One solenoid valve 12 closes second solenoid valve 13, and system is radiated directly in a manner of heat convection by surface cooler 8 first, works as interior
Temperature is higher than out of service when certain temperature.This stage, the fluid media (medium) in liquid storage pool 16 flow through table under the driving of circulating pump 14
Cooler 8, the room air driven with centrifugal blower 7 exchange heat, and the heat in liquid storage pool 16 is constantly discharged into room air
In, temperature of fluid medium declines, and indoor air temperature increases.
(3), night, undergo 8 exothermic phase of surface cooler, when the temperature of fluid medium in liquid storage pool 16 drop to certain value and
When indoor air temperature is less than set temperature, four-way reversing valve 2 switches 1 air intake duct of compressor, exhaust pipe and finned heat exchanger 3, casing
The connection of heat exchanger 6 simultaneously closes off the first solenoid valve 12, opens second solenoid valve 13, inverted running heat pump cycle, and system carries out
Heat pump forces heat release.This stage, the heat of 16 middle-low grade of system pumping liquid storage pool are greenhouse heating, under temperature of fluid medium
Drop, indoor air temperature increase.If temperature of fluid medium is down to certain value, source heat pump heat temperature is too low, and system is out of service.
(4), in addition, under successive cloudy days and extreme low temperature weather condition, no matter daytime and night, when indoor air temperature is reduced to
Certain temperature, and temperature of fluid medium be not more than set temperature when, open centrifugal blower 7 meet an urgent need to greenhouse with 9 electrical heating
Heating.
It is carried out in the 8# heliogreenhouses in little Tang mountain countries of Beijing family's precision agriculture study demonstration base, greenhouse thing is walked
To, long 29.8m, span 7m, the high 2.7m of north wall, the high 3.7m of ridge.System equipment is according to Fig. 1 principle schematics and technology of the invention
The connection method that scheme is provided is attached.System equipment model IE-FWR-H13 (see Fig. 2), nominal heating capacity 13.27
KW, nominal capacity 11.85kW, refrigerant are monochlorodifluoromethane (R22), fill 5kg.Wherein, compressor 1 is the U.S.
Vortex VR48KS-TFP-542, the 380V voltage of Copeland companies production, rated input power 3.56kW.Fin exchanges heat
3 heat-transfer pipe of device is using red copper riffled tube, equilateral triangle fork row, and for pipe away from for 25mm, fin is corrugated whole aluminum fin-stock, a pitch of fins
1.8mm, piece thickness 0.12mm.6 main body of double-tube heat exchanger uses Φ 42.4mm coating steel pipes, and inner tube is using in 9.52 × 0.41mm of Φ
Threaded steel pipe, whole outsourcing 15mm thickness heat-preservation cottons.Centrifugal blower 7 is the LKW280M-4 of Linzhou City air-conditioning draught fan factory production, specified stream
Measure 5000 m3/h, total head 500pa, 380V voltage, rated power 1.37kW.Circulating pump 14 is the PD- of Wei Le companies of Germany production
300E immersible pumps, 220V voltages, rated output power 300W, total head 7.5m, maximum displacement 9.69m3/h.Plenum chamber 10 is pacified
Right over shell 17, size is 100cm × 100cm × 50cm, and Φ 297mm air outlets 2 are respectively facing east, west.Table is cold
8 heat-transfer pipe of device is using red copper light pipe, equilateral triangle fork row, and pipe is away from for 25mm, and fin is using corrugated whole aluminum fin-stock, a pitch of fins
1.8mm, piece thickness 0.12mm.Liquid storage pool 16 is located in the middle part of greenhouse, and fluid media (medium) is water, useful storage volume 4.18m3, main body material
Material is 24 cm brick walls, and cement mortar smoothes out, and inner and outer surfaces do waterproof, and the heat preservation of 3.8cm thickness extruded sheets, pond cover are close in outer surface
Plate is fitted closely by 1.5cm thickness woodwork plate with extruded sheet.Circulating line includes air hose 11 and water pipe, and air hose 11 is Φ
300mm cloth bag air hoses, double-row hole (21 mm of Φ), is 30 ° with vertical direction angle, and east-west direction pitch of holes 25cm, 2 total
28m is counted, 10 both sides air outlet of plenum chamber is connected, is hung below greenhouse ridge away from ground 2.2m eminences；Water pipe is Φ 32PVC
Pipe is cladded with rubber and plastic muff.Electrical heating 9 is finned electric heating tube, and 380V voltages, specified heats power is 4.5kW.Control machine
Structure 18 is technical grade PLC (programmable logic controller), is integrated on system casing 17.
Method using the present invention carries out in accordance with the following steps：
1) daytime (09 in winter:00-16:00), when heliogreenhouse indoor air temperature rises to 27 DEG C, startup compressor 1 centrifuges
Wind turbine 7, circulating pump 14 simultaneously close off the first solenoid valve 12, open second solenoid valve 13, system operation thermal-arrest；Work as indoor air temperature
It is out of service when being reduced to 22 DEG C.2) night (16:00-09:00), when indoor air temperature is reduced to 13 DEG C, start centrifugal blower 7
With circulating pump 14, the first solenoid valve 12 is opened simultaneously, closes second solenoid valve 13, system passes through table in a manner of heat convection first
Cooler 8 radiates, out of service when indoor air temperature is higher than 17 DEG C.3) night (16:00-09:00) 8 heat release rank of surface cooler, is undergone
Section, when the water temperature drop in liquid storage pool 16 to 25 DEG C and indoor air temperature is less than 13 DEG C, four-way reversing valve 2 switches compressor 1 and inhales
The connection of tracheae, exhaust pipe and finned heat exchanger 3, double-tube heat exchanger 6 simultaneously closes off the first solenoid valve 12, opens the second electromagnetism
Valve 13, is reversed heat pump cycle, and system carries out heat pump and forces heat release.4) in addition, in successive cloudy days and extreme low temperature weather condition
Under, no matter daytime and night, when indoor air temperature is reduced to 10 DEG C, and water temperature is not more than 13 DEG C in liquid storage pool 16, unlatching centrifugation
Wind turbine 7 carries out emergent heating with finned electrical heating 9 to greenhouse.
Using the greenhouse temperature regulating system and its adjusting method of the present invention, heliogreenhouse night temperature on average can be promoted
4.0 DEG C, average indoor temperature on daytime 3.6 DEG C (on January 19th, 2015, see Fig. 3) is reduced, while it is relatively wet will to be averaged at night
Degree reduces by 10.9%.It heats in the period, system is in heating condition always, and collection, exothermic process entirety COP values are 2.7.The system
And its heating method night in winter heat, effect on moisture extraction it is notable, energy-efficient, no pollution.
In conclusion the present invention has the following advantages：Compressor passes through in temperature regulating system in greenhouse provided by the invention
Four-way reversing valve is sequentially connected with double-tube heat exchanger, expansion valve, finned heat exchanger respectively constitutes heat pump cycle unit, fin heat exchange
Device one end is provided with centrifugal blower, and the other end is connect with surface cooler, one end of double-tube heat exchanger and surface cooler respectively with circulating pump
Connection, the other end are connected to liquid storage pool respectively, and circulating pump is connected to liquid storage pool.In temperature regulating system in greenhouse provided by the invention
Using the heat pump cycle unit thermal-arrest, is radiated using the surface cooler and heat pump cycle unit, collecting efficiency can be promoted simultaneously
Extend the thermal-arrest time, the utilization rate for air heat energy of having more than needed in heliogreenhouse can be greatly improved, realizes heliogreenhouse heat in the time
Transfer spatially has significant heating and effect on moisture extraction, can effectively prevent crop chilling injury and high humidity environment
Caused pest and disease damage, and it is easily installed construction, stable and reliable operation, energy-saving effect is notable, has lower operating cost.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these modification or
It replaces, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution.
Claims (5)
1. a kind of greenhouse temperature regulating system, it is characterised in that：Including compressor (1), four-way reversing valve (2), finned heat exchanger
(3), expansion valve (4), double-tube heat exchanger (6), surface cooler (8), circulating pump (14) and liquid storage pool (16)；Compressor (1) warp
It crosses the four-way reversing valve (2) and is sequentially connected structure with described sleeve pipe heat exchanger (6), expansion valve (4), finned heat exchanger (3) respectively
At heat pump cycle unit, described finned heat exchanger (3) one end is provided with centrifugal blower (7), and the other end connects with the surface cooler (8)
Connect, one end of described sleeve pipe heat exchanger (6) and surface cooler (8) is connected to the circulating pump (14) respectively, the other end respectively with institute
Liquid storage pool (16) connection is stated, the circulating pump (14) is connected to the liquid storage pool (16)；Heat release room temperature is set as T2, when greenhouse temperature
When spending t less than T2, the fluid media (medium) in the liquid storage pool (16) flows through the surface cooler (8) under the circulating pump (14) driving
Exothermic process is completed in heat dissipation, when the temperature of fluid medium in the liquid storage pool (16) is reduced to T2, and works as greenhouse temperature t not
When reaching T2, the heat pump cycle unit connection, inverted running carries out pressure heat release；
It further include the plenum chamber (10) for being provided with air hose (11)；
The air hose (11) is cloth bag air hose, and the air hose (11) is provided with single row of holes or multiple rows of hole, each row when opening two rounds
The angle all same in the hole and vertical direction；
It is provided with the first solenoid valve (12), the circulating pump on the pipeline that the circulating pump (14) is connected to the surface cooler (8)
(14) it is provided with second solenoid valve (13) on the pipeline being connected to described sleeve pipe heat exchanger (6)；
It is both provided with check-valves on the pipeline that described sleeve pipe heat exchanger (6) and surface cooler (8) are connected to the liquid storage pool (16)
(15)；
Filter (5) is provided between described sleeve pipe heat exchanger (6) and the expansion valve (4).
2. temperature regulating system in greenhouse according to claim 1, it is characterised in that：Further include connecting with the surface cooler (8)
The electrical heating (9) connect.
3. temperature regulating system in greenhouse according to claim 2, it is characterised in that：The electrical heating (9) is finned electricity
Heating, heats power are less than the heats power of the heat pump cycle unit.
4. temperature regulating system in greenhouse according to claim 1, it is characterised in that：The agent structure of the liquid storage pool (16)
It pours for armored concrete or fiberglass, is provided with for heat-insulated styrofoam on the lateral wall of the liquid storage pool (16).
5. the side of greenhouse temperature is adjusted in a kind of greenhouse temperature regulating system of application as described in claim 1-4 any one
Method, it is characterised in that：The specific steps are：
S1, thermal-arrest room temperature is set as T1, when greenhouse temperature t is more than T1, refrigerant is driven through described by the compressor (1)
Finned heat exchanger (3) absorbs air heat energy, after the compressor (1) compression, flows through described sleeve pipe heat exchanger (6) and circulating pump
(14) drive fluid media (medium) heat exchange, by heat storage in the liquid storage pool (16), most afterwards through the expansion valve (4) again into
Enter the finned heat exchanger (3) and form cycle, completes collection thermal process；
Heat release room temperature is set as T2, when greenhouse temperature t is less than T2, the fluid media (medium) in the liquid storage pool (16) is in the cycle
The surface cooler (8) heat dissipation is flowed through under pump (14) driving, completes exothermic process, the fluid media (medium) temperature in the liquid storage pool (16)
When degree is reduced to T2, into next step；
S2, when greenhouse temperature t is not up to T2, heat pump cycle unit connection, inverted running carries out pressure heat release.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106034852A (en) * | 2016-05-04 | 2016-10-26 | 佛山市正茂园艺有限公司 | Air energy central temperature automatic adjusting system |
| CN107182635A (en) * | 2017-06-12 | 2017-09-22 | 兰州交通大学 | A kind of heliogreenhouse dehumidifying and ventilation system |
| CN110547130A (en) * | 2019-08-28 | 2019-12-10 | 北京农业智能装备技术研究中心 | Heat storage and temperature compensation system and method for greenhouse |
| CN111309072B (en) * | 2020-02-26 | 2021-02-26 | 中国农业大学 | Sunlight greenhouse temperature control method based on surface cooler-fan |
| US11528851B2 (en) * | 2020-11-05 | 2022-12-20 | Haier Us Appliance Solutions, Inc. | Indoor garden center with a moisture management system |
| CN113475272A (en) * | 2021-06-23 | 2021-10-08 | 恩施不亦乐乎科技农业有限公司 | Novel energy-saving greenhouse production environment control device based on heat storage heat pump |
| CN114158403A (en) * | 2021-11-23 | 2022-03-11 | 武汉理工大学 | Energy-saving heating device for greenhouse seedlings and greenhouses |
| CN114711067B (en) * | 2022-03-09 | 2023-04-28 | 北京市农林科学院智能装备技术研究中心 | Integrated greenhouse thermal environment regulation and control system and method |
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| CN104913538A (en) | 2015-09-16 |
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Address after: 1107, block a, Nongke building, No. 11, Shuguang garden middle road, Haidian District, Beijing, 100097 Patentee after: Intelligent equipment technology research center of Beijing Academy of agricultural and Forestry Sciences Address before: 318b, block a, Beijing Agricultural Science Building, 11 Shuguang Huayuan Middle Road, Haidian District, Beijing 100097 Patentee before: BEIJING RESEARCH CENTER OF INTELLIGENT EQUIPMENT FOR AGRICULTURE |