CN106857110A - A kind of agricultural greenhouse plant seasonal comprehensive temperature control system and temperature control method - Google Patents

A kind of agricultural greenhouse plant seasonal comprehensive temperature control system and temperature control method Download PDF

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Publication number
CN106857110A
CN106857110A CN201710174391.2A CN201710174391A CN106857110A CN 106857110 A CN106857110 A CN 106857110A CN 201710174391 A CN201710174391 A CN 201710174391A CN 106857110 A CN106857110 A CN 106857110A
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China
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water
air
temperature
warm
main
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CN201710174391.2A
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Chinese (zh)
Inventor
张于峰
邓娜
王俊杰
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Tianjin University
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Tianjin University
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Priority to CN201710174391.2A priority Critical patent/CN106857110A/en
Publication of CN106857110A publication Critical patent/CN106857110A/en
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/24Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
    • A01G9/246Air-conditioning systems
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/30Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25Greenhouse technology, e.g. cooling systems therefor
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/14Measures for saving energy, e.g. in green houses

Abstract

The invention discloses a kind of seasonal comprehensive temperature control system of agricultural greenhouse plant, including net for air-source heat pump units, the condensator outlet end of net for air-source heat pump units connects with main-supply, main-supply, main water return tube is respectively equipped with the first regulating valve and the second regulating valve, main-supply is connected with the water inlet end and water knockout drum of warm-air drier respectively, water knockout drum is connected with the water inlet end of floor heating pipe, warm-air drier air outlet is connected with wind-distributing pipe, water collecting and diversifying device water inlet end is provided with the first magnetic valve, warm-air drier water inlet end is provided with the second magnetic valve, warm-air drier backwater end and water collector are connected with main water return tube, main water return tube is provided with hot water storage tank, second regulating valve is connected with the entrance point of water circulating pump, the port of export of water circulating pump is connected with the condenser inlet end of net for air-source heat pump units.Winter operation of the present invention is reliable, stabilization, can be in environment temperature for 15 DEG C of big temperature rises of implemented below are heated, and summer can realize cooling in canopy.Do not need the fuel such as coal as driving, directly using the energy of air, build the temperature of shed of suitable for crop growth, it is energy-efficient, pollution-free.

Description

A kind of agricultural greenhouse plant seasonal comprehensive temperature control system and temperature control method
Technical field
The invention belongs to agricultural engineering technology field, it is related to a kind of for agricultural greenhouse plant provides seasonal comprehensive temperature Control system and temperature control method.
Background technology
The function of greenhouse or green house of vegetables (hereinafter referred to as " greenhouse ") is under the conditions of the anti-season of natural environment, to build suitable For fruits and vegetables, the environmental condition of flower growth development, efficiently produced.For production estimation, temperature is most important One of environmental key-element.Cold district winter outdoor temperature is less than -10 DEG C, in order to the normal growth for ensureing crop is developed, greenhouse It is interior to configure heating facility.The some areas in China northeast, the extremely frigid zones of northwest and North China, legacy system heating expense is about Account for the 50%~60% of operating cost.In order to reduce system energy consumption, productivity effect is improved, reduce pollution, energy-efficient greenhouse Heating system is imperative.
Current cold district greenhouse conventional method of passing the winter has following several.One is that central heating (sets up boiler, geothermal well Deng), heating system is set in greenhouse, because greenhouse heat loss is serious, heating operation is costly, it is impossible to lift ground temperature, temperature in canopy Degree skewness.Two is hot blast furnace heating, by the fuel (such as coal, fuel oil and stalk) for burning different, discharges heat.Its heat Efficiency is low, and temperature of shed fluctuation is big.Flue gas after burning contains pernicious gas (such as sulphur and nitrogen oxides, tar), and pollution is tight Weight.Three is that heating wire is embedded in underground by electricity heating system, for improving ground temperature.It is use of nursing young plants in hothouses that the method is mainly, can only Used as interim short-term heating measure, it is impossible to passed the winter for agricultural greenhouse.Three of the above method summer cannot produce cooling Effect.
The main target of greenhouse heating has two:One is keeping ground temperature, plant root is in appropriate warm area, be beneficial to Its growth;Secondly being to maintain canopy temperature, make the aerial part of plant from frostbite.Traditional greenhouse heating system mode is in canopy Interior ground sets heating, for improving canopy temperature, it is impossible to ensure root temperature, it is difficult to realize the comprehensive temperature control that plant needs System;Single heat-supplying mode cannot also realize the cooling-down effect of summer in addition.
Existing conventional heat pump form one is heated using soil source heat pump system, but because the summer in winter picks and places heat injustice Weighing apparatus, causes the soil moisture to reduce, and service life is short;Two be using groundwater heat pumps heat, if longtime running draining without Method whole recharge, level of ground water declines, and breaks ring belowground ecosystem.Due to being arranged only with ground installation, it is impossible to effectively solve Certainly comprehensive temperature requirements of plant.
The content of the invention
In order to solve problems of the prior art, it is seasonal comprehensive that the present invention provides a kind of agricultural greenhouse plant Temperature control system and temperature control method, overcome that winter greenhouse heating operation in the prior art is costly, energy utilization rate is low, above and below ground The problem that temperature difference is big, seriously polluted and summer cannot lower the temperature.
The technical solution adopted in the present invention is comprised the following steps:A kind of seasonal comprehensive temperature control of agricultural greenhouse plant System, including net for air-source heat pump units, the condensator outlet end of net for air-source heat pump units connect with main-supply, main-supply, Main water return tube is respectively equipped with the first regulating valve and the second regulating valve, main-supply respectively with the water inlet end and water knockout drum phase of warm-air drier Connection, water knockout drum is connected with the water inlet end of floor heating pipe, and warm-air drier air outlet is connected with wind-distributing pipe, is set on water collecting and diversifying device water inlet end There is the first magnetic valve, warm-air drier water inlet end is provided with the second magnetic valve, and warm-air drier backwater end and water collector are connected with main water return tube Logical, main water return tube is provided with hot water storage tank, and the second regulating valve is connected with the entrance point of water circulating pump, the port of export and the sky of water circulating pump The condenser inlet end connection of air supply heat pump unit.
The seasonal comprehensive temperature control method of a kind of agricultural greenhouse plant, using above-mentioned temperature control system, during winter:Work as greenhouse Interior temperature at or below setting canopy in heat lower limit temperature when, net for air-source heat pump units, water circulating pump, warm-air drier start, First regulating valve, the second regulating valve, the first magnetic valve, water collecting and diversifying device, the second magnetic valve are opened;
During summer:When the temperature in greenhouse or greenhouse meets or exceeds the upper limit, net for air-source heat pump units refrigeration mode is opened Dynamic, water circulating pump and warm-air drier start, and the first regulating valve, the second regulating valve and the second magnetic valve are opened, the first magnetic valve and point Water collector is closed, and recirculated water enters warm-air drier by hot water storage tank, water circulating pump, air-source handpiece Water Chilling Units, main-supply.
When the outer air themperature of night summer canopy is less than temperature of shed or temperature of shed higher than crop suitable growth temperature constantly, The ventilation equipment opened in good time in greenhouse is lowered the temperature.
The beneficial effects of the invention are as follows:Winter of the invention can be the heat of the outer air of cold district canopy, by air-source Heat pump and its floor heating pipe and hot-air system of connection are transferred in greenhouse, and heat is then discharged greenhouse by summer, realizes Winter heat supply Summer cooling.Heat pump winter operation is reliable in a steady stream for Cryogenic air, stabilization, can be -15 DEG C of big temperature rises of implemented below in environment temperature Heat.And do not need the fuel such as coal as driving, directly using the energy of air, build temperature in the canopy of suitable for crop growth Degree, it is energy-efficient, pollution-free.End solves traditional greenhouse heat supply system in the form of floor heating pipe radiating and wind-distributing pipe air-supply System temperature of shed skewness, the low problem of the soil moisture.
Brief description of the drawings
The seasonal comprehensive temperature control system structural representation of Fig. 1 agricultural greenhouses plant;
Wherein:1-air source heat pump;2-water circulating pump;3-the first regulating valve;4-the second regulating valve;5-main water supply Pipe;6-main water return tube;7-the first magnetic valve;8-water collecting and diversifying device;9-floor heating pipe;10-the second magnetic valve;11-warm-air drier; 12-wind-distributing pipe;13-hot water storage tank.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and detailed description.
The principle of present system is:Winter takes heat using air source heat pump from air, and by hot-air system and ground Heating coil system, transfers heat in greenhouse, so as to build the temperature conditionss of suitable crop growth.In the arrangement of system end Aspect, connects floor heating pipe and radiates and warm-air drier connection wind-distributing pipe air-supply, to ensure temperature in the soil moisture and canopy by water collecting and diversifying device Degree reaches the requirement of plant growth;Summer utilizes same unit, and heat in canopy is transferred into the outer air of canopy by hot-air system In, for the growth of plant provides comfortable temperature and humidity condition.The thermal power plant unit is the unit of low-temperature air source heat pump 1, machine Group can realize -15 DEG C of environment temperature and following, and big temperature rise is heated.End carries out heat exchange using floor heating pipe 9 and soil, with reference to warm Blower fan 11, wind-distributing pipe 12 exchange heat with room air.
Apply the present invention to cold district agricultural greenhouse, illustrated with reference to Fig. 1 system flow charts.The system includes Air source heat pump (cold water) unit 1, water circulating pump 2, the first regulating valve 3, the second regulating valve 4, main-supply 5, main-supply 6, First magnetic valve 7, the second magnetic valve 10, water collecting and diversifying device 8, floor heating pipe 9, warm-air drier 11 and wind-distributing pipe 12.Air source heat pump is (cold Water) the condensator outlet end of unit 1 connects with main-supply 5.Main-supply, main water return tube are respectively equipped with the and of the first regulating valve 3 Second regulating valve 4.Main-supply 5 is connected with the water inlet end and water knockout drum 8 of warm-air drier 11 respectively, water knockout drum 8 and floor heating pipe 9 Water inlet end is connected, and warm-air drier air outlet is connected with wind-distributing pipe 12, and the water inlet end of water collecting and diversifying device 8 is provided with the first magnetic valve 7, warm wind The water inlet end of machine 11 is provided with the second magnetic valve 10.The backwater end of warm-air drier 11 and water collector 8 are connected with main water return tube 6, main backwater Pipe 6 is provided with hot water storage tank 13, and the second regulating valve 4 is connected with the entrance point of water circulating pump 2, the port of export and air of water circulating pump 2 The condenser inlet end connection of source heat pump (cold water) unit 1.
Winter, when heating lower limit temperature in canopy of the canopy temperature at or below setting, net for air-source heat pump units 1, Water circulating pump 2, warm-air drier 11 start, the first regulating valve 3, the second regulating valve 4, the first magnetic valve 7, water collecting and diversifying device 8, the second electromagnetism Valve 10 is opened.In the air side of net for air-source heat pump units 1, under the driving of heat pump inner fan, air flows through source pump 1 By absorbing and cooling temperature during evaporator, the air of cooling enters air again, and the air of intensification enters back into the evaporator of source pump 1 With refrigerant heat exchanger, lower the temperature while imparting heat to refrigerant, in again returning to air.Go round and begin again, air side is used as low Temperature-heat-source, constantly provides heat to source pump 1.At the same time, in the water side of net for air-source heat pump units 1, in water circulating pump 2 Driving under, recirculated water enters source pump 1 from hot water storage tank 13, while by the evaporator heat that comes of transfer of source pump 1 Amount and the energy of the power consumption of net for air-source heat pump units 1 conversion, high temperature side recirculated water is heated by condenser, and heated water is by master Feed pipe 5 is flowed into water collecting and diversifying device 8 and warm-air drier 11.Floor heating pipe 9 is fed the water into by water collecting and diversifying device 8, and with canopy in soil Heat exchange, hot water heating air in warm-air drier 11, and the air of heating is sent in canopy by wind-distributing pipe 12 mixes with other air, Temperature of shed rises.Temperature reduction after the interior water of pipe and soil and air heat-exchange, by main water return tube 6, hot water storage tank 13, second Regulating valve 4 and water circulating pump 2, then it flow back into the condenser heat temperature raising of net for air-source heat pump units 1.Move in circles, major cycle water The heat that net for air-source heat pump units 1 is extracted from air is constantly conveyed to floor heating pipe 9 and warm-air drier 11 by pump 2, is made in greenhouse Portion's temperature constantly rises.Hot-air system (i.e. warm-air drier 11 and wind-distributing pipe 12) and floor heating guard system (i.e. water collecting and diversifying device 8 and floor heating pipe 9) use to be allocated according to the actual requirements.The heat for heating as can be seen here is all taken from the heat of greenhouse extraneous air and lacks The heat that calorimetric pump power consumption is transformed.
Summer, when the temperature in greenhouse or greenhouse meets or exceeds the upper limit, handpiece Water Chilling Units 1, major cycle water pump 2 and warm wind Machine 11 starts, and the first regulating valve 3, the second regulating valve 4 and the second magnetic valve 10 are opened, and the first magnetic valve 7 and water collecting and diversifying device 8 are closed Close, recirculated water enters warm-air drier 11 by hot water storage tank 13, water circulating pump 2, air-source handpiece Water Chilling Units 1, main-supply 5.Due to , higher than the temperature in canopy, in 1 low temperature side of handpiece Water Chilling Units, by the driving of major cycle water pump 2, water is by flowing through for the outer air themperature of canopy By absorbing and cooling temperature during evaporator (i.e. the condenser of heat pump cycle) of handpiece Water Chilling Units 1, the water of cooling enters warm by main-supply 5 Blower fan 11, while cooling air, and the air of cooling is sent in canopy by wind-distributing pipe 12 mixes with other air, temperature of shed Reduce.Meanwhile, in the high temperature side of handpiece Water Chilling Units 1, under the driving of unit inner fan, shifted by the evaporator of handpiece Water Chilling Units 1 The heat for coming over heats the outer air of canopy by condenser (i.e. the evaporator of heat pump cycle), unit internal working medium because with air heat-exchange And own temperature reduction, then the evaporator heat absorption intensification for flowing back to handpiece Water Chilling Units 1.Move in circles, constantly the heat in greenhouse The outer air of canopy is transferred to, makes the temperature drop in greenhouse.Simultaneously for the outer air themperature of night summer canopy less than temperature of shed or When temperature of shed is higher than crop suitable growth temperature, the ventilation equipment that can be opened in good time in greenhouse is lowered the temperature.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (3)

1. the seasonal comprehensive temperature control system of a kind of agricultural greenhouse plant, it is characterised in that including net for air-source heat pump units (1), the condensator outlet end of net for air-source heat pump units (1) connects with main-supply (5), main-supply (5), main water return tube (6) Be respectively equipped with the first regulating valve (3) and the second regulating valve (4), main-supply (5) respectively with the water inlet end of warm-air drier (11) and point Hydrophone (8) is connected, and water knockout drum (8) is connected with the water inlet end of floor heating pipe (9), warm-air drier (11) air outlet and wind-distributing pipe (12) Connection, water collecting and diversifying device (8) water inlet end is provided with the first magnetic valve (7), and warm-air drier (11) water inlet end is provided with the second magnetic valve (10), warm-air drier (11) backwater end and water collector (8) are connected with main water return tube (6), and main water return tube (6) is provided with hot water storage tank (13), the second regulating valve (4) is connected with the entrance point of water circulating pump (2), the port of export and the air source heat pump machine of water circulating pump (2) The condenser inlet end connection of group (1).
2. the seasonal comprehensive temperature control method of a kind of agricultural greenhouse plant, it is characterised in that using temperature control described in claim 1 System, during winter:
When heating lower limit temperature in canopy of the canopy temperature at or below setting, net for air-source heat pump units (1), water circulating pump (2), warm-air drier (11) starts, the first regulating valve (3), the second regulating valve (4), the first magnetic valve (7), water collecting and diversifying device (8), second Magnetic valve (10) is opened;
During summer:When the temperature in greenhouse or greenhouse meets or exceeds the upper limit, net for air-source heat pump units (1) refrigeration mode is opened Dynamic, water circulating pump (2) and warm-air drier (11) start, and the first regulating valve (3), the second regulating valve (4) and the second magnetic valve (10) are beaten Open, the first magnetic valve (7) and water collecting and diversifying device (8) are closed, and recirculated water is cold by hot water storage tank (13), water circulating pump (2), air-source Water dispenser group (1), main-supply (5) enter warm-air drier (11).
3. the seasonal comprehensive temperature control method of agricultural greenhouse plant according to claim 3, it is characterised in that when night summer Between canopy outer air themperature when being higher than crop suitable growth temperature less than temperature of shed or temperature of shed, open logical in greenhouse in good time Wind facility is lowered the temperature.
CN201710174391.2A 2017-03-22 2017-03-22 A kind of agricultural greenhouse plant seasonal comprehensive temperature control system and temperature control method Pending CN106857110A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111781974A (en) * 2020-08-24 2020-10-16 浙江树人学院(浙江树人大学) Intelligent control device for temperature in factory and control system thereof
CN113243251A (en) * 2021-05-26 2021-08-13 唐继红 Process for cultivating mushrooms in low-temperature environment and cultivation equipment thereof

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CN205579726U (en) * 2015-12-01 2016-09-14 天津优信捷科技发展有限公司 A ground -source heat pump for warmhouse booth
CN105993722A (en) * 2016-07-11 2016-10-12 青海鑫瑞新能源技术开发有限公司 Solar heating warming system for vegetable fruit greenhouse
CN206728734U (en) * 2017-03-22 2017-12-12 天津大学 A kind of seasonal comprehensive temperature control system of agricultural greenhouse plant

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Publication number Priority date Publication date Assignee Title
CN202476184U (en) * 2012-03-13 2012-10-10 马洪彬 Greenhouse temperature control system
CN103190312A (en) * 2013-04-01 2013-07-10 尚秀军 Energy-efficient solar greenhouse in alpine region
CN103190313A (en) * 2013-04-19 2013-07-10 哈尔滨工业大学 Air energy soil-thermal storage heating and cooling device for fruit and vegetable plastic sheds or greenhouses in cold areas
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111781974A (en) * 2020-08-24 2020-10-16 浙江树人学院(浙江树人大学) Intelligent control device for temperature in factory and control system thereof
CN111781974B (en) * 2020-08-24 2021-09-07 浙江树人学院(浙江树人大学) Intelligent temperature control device in factory
CN113243251A (en) * 2021-05-26 2021-08-13 唐继红 Process for cultivating mushrooms in low-temperature environment and cultivation equipment thereof

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