CN109588165B - Temperature adjusting system of nursery greenhouse and control method thereof - Google Patents
Temperature adjusting system of nursery greenhouse and control method thereof Download PDFInfo
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- CN109588165B CN109588165B CN201811580018.8A CN201811580018A CN109588165B CN 109588165 B CN109588165 B CN 109588165B CN 201811580018 A CN201811580018 A CN 201811580018A CN 109588165 B CN109588165 B CN 109588165B
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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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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
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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
-
- 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
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- Life Sciences & Earth Sciences (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Greenhouses (AREA)
Abstract
The invention relates to the technical field of temperature-adjusting heating equipment, in particular to a temperature-adjusting system of a nursery greenhouse, which comprises a heat pump system, wherein the heat pump system comprises an evaporator, a compressor, a condenser and a throttling device; the air duct with the built-in fan is arranged inside the nursery greenhouse to circulate air flow inside the nursery greenhouse; the heat exchange medium circulates in a circulation loop formed by sequentially communicating the evaporator, the compressor, the condenser and the throttling device, and air is used as an energy source to heat or cool airflow flowing through the air channel. The invention adopts the air source heat pump system to heat the nursery, ensures that the inside of the nursery greenhouse at night or in winter is maintained in a proper temperature range suitable for nursery growth, does not generate toxic gas, is safe and environment-friendly, has high energy efficiency, and can save the heating cost.
Description
Technical Field
The invention relates to the technical field of temperature-adjusting heating equipment, in particular to a temperature-adjusting system of a nursery greenhouse and a control method thereof.
Background
Before the facility agriculture greenhouse is raised, a technical means that the greenhouse is surrounded by transparent materials and the solar heat energy is utilized to heat a small space environment to enable plants in the greenhouse to grow across seasons and regions is provided, and the facility agriculture is more optimized and popularized on a larger scale. In addition, the prior art can not solve the problems that the temperature fluctuation of the nursery in four seasons or in the morning and evening is large, the seedlings are frozen, or the growing period of the nursery is not good due to overhigh temperature in summer and the like.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a temperature regulating system of a nursery greenhouse and a control method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that:
a temperature regulating system for a nursery house comprising:
a heat pump system comprising an evaporator, a compressor, a condenser and a throttling device;
the air duct with the built-in fan is arranged inside the nursery greenhouse to circulate air flow inside the nursery greenhouse;
the heat exchange medium circulates in a circulation loop formed by sequentially communicating the evaporator, the compressor, the condenser and the throttling device, and air is used as an energy source to heat or cool airflow flowing through the air channel.
As an embodiment, the air duct is disposed above the nursery booth, the fan is disposed at an inlet of the air duct, and the condenser is disposed in front of an air outlet of the fan.
In one embodiment, the heat pump system includes a four-way valve connected in series in the circulation loop to switch the flow direction of the heat exchange medium in the evaporator.
In one embodiment, a humidifier is disposed in the air duct to adjust the humidity of the air inside the nursery house.
In one embodiment, the humidifier is disposed in front of the condenser in the flow direction of the air flow.
As an implementation mode, an air equalizing structure is arranged at an outlet of the air duct, so that the heated or cooled air flow in the air duct flows downwards uniformly.
Preferably, the wind-equalizing structure is a wind-equalizing plate, and comprises a plate body and a plurality of ventilation holes arranged on the plate body.
In one embodiment, the heat pump system is an air source heat pump system, and the evaporator and the compressor are arranged outside the nursery greenhouse and communicated with the outside atmosphere.
In one embodiment, the front and the rear of the condenser are respectively provided with a temperature sensor to detect the return air or supply air temperature.
In one embodiment, the front part of the compressor is provided with a gas-liquid separator, the return gas pipeline is provided with an oil separator, and the outer wall of the compressor is provided with an electric heating belt.
Preferably, the fan includes motor, motor support and flabellum, the electric heating area is installed to the below of flabellum.
Preferably, a defrosting temperature sensor is arranged at the liquid separating pipe of the evaporator.
Another object of the present invention is to provide a method for controlling a temperature regulating system of any one of the nursery greenhouses as described above, wherein when the ambient temperature is lower than a first set temperature, the method controls the heat exchange medium to flow in a first direction in the evaporator to heat the air flowing through the air duct.
In one embodiment, when the ambient temperature is higher than the second set temperature, the heat exchange medium is controlled to flow in the second direction in the evaporator, and the air flow passing through the air duct is cooled.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the invention adopts the air source heat pump system to heat the nursery garden, ensures that the inside of the nursery garden greenhouse is maintained in a proper temperature range suitable for the growth of the nursery garden at night or in winter, does not generate toxic gas, is safe and environment-friendly, has high energy efficiency, and can save the heating cost. In addition, the nursery temperature regulation system can be used for reducing the temperature in the greenhouse and avoiding the high temperature from shortening the flowering period of the flowering plants when the temperature is too high in summer.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of a nursery temperature regulation system according to the present invention.
The drawing is marked with:
1. nursery greenhouses; 2. planting seedlings; 3. a wind equalizing structure; 4. a humidifier; 5. a condenser; 6. a fan; 7. an air duct; 8. an evaporator; 9. a compressor.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it for those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
A nursery greenhouse tempering system, as shown in fig. 1, comprising:
a heat pump system comprising an evaporator 8, a compressor 9, a condenser 5 and a throttling device;
an air duct 7 with a built-in fan 6 is arranged inside the nursery greenhouse 1 to circulate air flow inside the nursery greenhouse 1;
the heat exchange medium circulates in a circulation loop formed by sequentially communicating the evaporator 8, the compressor 9, the condenser 5 and the throttling device, and air is used as an energy source to heat or cool the airflow flowing through the air channel 7.
In one embodiment, the heat pump system includes a four-way valve serially connected in the circulation loop to switch the flow direction of the heat exchange medium in the evaporator 8.
In one embodiment, a humidifier 4 is disposed in the air duct 7 to adjust the air humidity inside the nursery house 1.
Preferably, the humidifier 4 is provided in front of the condenser 5 in the flow direction of the air stream.
As an embodiment, an air equalizing structure 3 is arranged at an outlet of the air duct 7, so that the heated or cooled air flow in the air duct 7 flows downwards uniformly;
preferably, the air-equalizing structure 3 is an air-equalizing plate, and includes a plate body and a plurality of ventilation holes arranged on the plate body.
In one embodiment, the heat pump system is an air source heat pump system, and the evaporator 8 and the compressor 9 are disposed outside the nursery house 1 and are communicated with the outside atmosphere.
In one embodiment, the front and rear portions of the condenser 5 are respectively provided with a temperature sensor to detect the temperature of the return air or the supply air.
In one embodiment, a gas-liquid separator is installed at the front part of the compressor 9, an oil separator is arranged in the return gas pipeline, and an electric heating belt is arranged on the outer wall;
preferably, the fan 6 comprises a motor, a motor bracket and fan blades, and an electric heating belt is installed below the fan blades.
Preferably, a defrosting temperature sensor is arranged at the liquid separating pipe of the evaporator 8.
Another object of the present invention is to provide a method for controlling a temperature regulating system of a nursery house as described above, wherein when the ambient temperature is lower than a first set temperature, the heat exchange medium is controlled to flow in a first direction in the evaporator 8 to heat the air flowing through the air duct 7.
In one embodiment, when the ambient temperature is higher than the second set temperature, the heat exchange medium is controlled to flow in the second direction in the evaporator 8 to cool the air flow passing through the air duct 7.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the invention adopts the air source heat pump system to heat the nursery, ensures that the inside of the nursery greenhouse at night or in winter is maintained in a proper temperature range suitable for nursery growth, does not generate toxic gas, is safe and environment-friendly, has high energy efficiency, and can save the heating cost.
Example 2
This embodiment is a further limitation or optimization or equivalent alternative to embodiment 1 and may be combined or used in a modified manner with the solution of embodiment 1.
A nursery greenhouse tempering system, as shown in fig. 1, comprising:
a nursery greenhouse 1;
an air source heat pump unit;
the air source heat pump unit includes:
the compressor 9 and the evaporator 8 are arranged outside the nursery greenhouse 1;
the condenser 5 is arranged inside the nursery greenhouse 1;
a throttling device;
the compressor 9, the evaporator 8, the condenser 5 and the throttling device are communicated to form a circulation path of a heat exchange medium, the heat exchange medium circulates in the circulation path, and air is used as an energy source to heat or cool airflow flowing through the air channel 7.
When the temperature of the nursery greenhouse 1 needs to be raised, air is used as a heat source, a heat exchange medium circulates in a circulation loop formed by sequentially communicating the evaporator 8, the compressor 9, the condenser 5 and the throttling device, and the air is used as the heat source to heat airflow flowing through the air duct 7.
When the temperature of the nursery greenhouse 1 needs to be reduced, air is used as a cold source, a heat exchange medium circulates in a circulation loop formed by sequentially communicating the evaporator 8, the compressor 9, the condenser 5 and the throttling device, and the air is used as a heat source to cool air flowing through the air channel 7.
As an embodiment of the present invention, the air-source heat pump unit further includes a reversing valve connected in series in the circulation path to switch the flow direction of the heat exchange medium in the evaporator 8.
The above-mentioned throttling device may specifically use an electronic expansion valve, the reversing valve is a four-way valve, and the electronic expansion valve and the four-way valve are connected in series in the circulation path.
As an embodiment of the present invention, an air duct 7 is provided inside the nursery greenhouse 1, a fan 6 is provided at an inlet of the air duct 7, and a condenser 5 is provided in front of an air outlet of the fan 6.
The fan 6 is arranged at the inlet of the air duct 7 to provide air flow power in the nursery greenhouse 1, so that the temperature in the greenhouse 1 is uniform, and the air flow circulation and exchange are promoted.
As an embodiment of the invention, the air duct 7 is arranged above the nursery, and the air equalizing structure 3 is arranged at the outlet of the air duct 7.
As an embodiment of the present invention, the wind equalizing structure 3 is a wind equalizing plate with a plurality of openings uniformly formed therein.
In an embodiment of the present invention, a humidity adjusting structure is disposed in front of the condenser 5 to adjust the humidity inside the nursery house 1, and preferably, the humidity adjusting structure is a humidifier 4.
In one embodiment of the present invention, the condenser 5 is provided with temperature sensors at the front and rear thereof, respectively, for detecting the return air and supply air temperatures.
As an embodiment of the present invention, the present invention includes a control unit that controls on/off of the four-way valve according to the temperature detected by the temperature sensor, so as to switch the flow direction of the heat exchange medium in the evaporator 8, and heat or cool the air flow passing through the air duct 7.
As an embodiment of the present invention, a gas-liquid separator is installed at the front of the compressor 9 to ensure oil return and lubrication of the compressor 9; an oil separator is arranged on a gas return pipeline of the compressor 9 to prevent the compressor 9 from being damaged due to liquid impact; the outer wall of the compressor 9 is provided with an electrical heating tape to ensure the temperature of the compressor 9 in cold winter.
As an embodiment of the present invention, the fan 6 includes a motor, a motor bracket and a fan blade, and an electric heating belt is installed below the fan blade to prevent the fan blade from being damaged due to the freezing of condensed water and collision with the fan blade.
In an embodiment of the present invention, a defrosting temperature sensor is disposed at the liquid dividing pipe of the evaporator 8.
Another object of the present invention is to provide a method for controlling a nursery temperature adjustment system, wherein the nursery temperature adjustment system comprises a nursery greenhouse 1 and an air source heat pump unit, and the heat exchange medium in the air source heat pump unit is controlled to circulate to adjust the internal temperature of the greenhouse 1.
As an embodiment of the present invention, when the internal temperature of the nursery house 1 is lower than a first set temperature, the heat exchange medium in the evaporator 8 of the air source heat pump unit is controlled to flow in a first direction;
and when the internal temperature of the nursery greenhouse 1 is higher than a second set temperature, controlling the heat exchange medium in the evaporator 8 of the air source heat pump unit to flow in a second direction.
The following description is provided in connection with the case that the present invention is specifically applied to temperature-controlled heating of flower nursery, for example, when the present invention is applied to osmanthus fragrans nursery, especially when osmanthus fragrans nursery is cultivated in the north of china, and at night or in winter (temperature is-25 ℃ -0 ℃), the air source heat pump unit is controlled to heat the nursery, so that the temperature of the nursery can be ensured, and the survival rate of tree seedlings can be improved; in addition, when the temperature is too high in summer, the air source heat pump unit is controlled to convey heat in the nursery garden to the outside atmosphere, and the problem that the flowering phase of the osmanthus fragrans is shortened due to the fact that the temperature is too high in summer is solved.
The invention adopts the air source heat pump system to heat the nursery, ensures that the inside of the nursery greenhouse 1 at night or in winter is maintained in a proper temperature range suitable for the growth of the nursery, does not generate toxic gas, is safe and environment-friendly, has high energy efficiency, and can save the heating cost. In addition, the temperature in summer is too high, the nursery temperature regulating system can also be used for reducing the temperature in the nursery greenhouse 1, and the high temperature is avoided to shorten the flowering period of the flower seedling plants.
Example 3
This example is a further definition or optimization of example 1 or 2.
Be equipped with ventilation unit on nursery big-arch shelter 1, ventilation unit's import and outside intercommunication, ventilation unit's export and the import intercommunication of wind channel 7, when being convenient for nursery big-arch shelter 1 ventilation, realize the air current exchange fast, provide sufficient carbon source for the plant to carry out photosynthesis. In addition, the temperature in the nursery greenhouse 1 can be adjusted to a temperature range suitable for the plants by means of air flow exchange with outside air, and energy consumption is reduced.
The front part and the rear part of the condenser 5 are respectively provided with a temperature sensor to detect the return air temperature and the supply air temperature, corresponding temperature information is converted into an electric signal and transmitted to the control unit, the control unit compares and judges the electric signal with a preset temperature signal, and the heat exchange medium in the evaporator 8 of the heat exchange medium of the air source heat pump unit is controlled to flow in a corresponding direction according to the judgment result.
The ventilation device is electrically connected with the control unit, and the control unit judges and controls the ventilation device to be opened or closed according to the temperature detected by the temperature sensor.
The inside of nursery big-arch shelter 1 is equipped with carbon dioxide concentration detection device, carbon dioxide concentration detection device is connected with foretell the control unit electricity, and the control unit judges and controls opening or closing of ventilation unit according to carbon dioxide concentration detection device.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A temperature regulating system for a nursery house comprising:
a heat pump system comprising an evaporator (8), a compressor (9), a condenser (5) and a throttling device;
it is characterized in that the preparation method is characterized in that,
the air duct (7) with the built-in fan (6) is arranged above the inside of the nursery greenhouse (1) so as to circulate the air flow in the nursery greenhouse (1);
the heat exchange medium circulates in a circulation loop formed by sequentially communicating the evaporator (8), the compressor (9), the condenser (5) and the throttling device, and air is used as an energy source to heat or cool airflow flowing through the air channel (7);
the heat pump system is an air source heat pump system, and the evaporator (8) and the compressor (9) are communicated with the outside atmosphere;
the heat pump system also comprises a reversing valve which is arranged in the circulation loop in series so as to switch the flow direction of a heat exchange medium in the evaporator (8);
the fan (6) is arranged at the inlet of the air duct (7) and comprises a motor, a motor bracket and fan blades, and an electric heating belt is arranged below the fan blades;
the condenser (5) is arranged in front of an air outlet of the fan (6);
an air equalizing structure (3) is arranged at the outlet of the air duct (7) so that the heated or cooled air flow in the air duct (7) flows downwards uniformly;
the wind-equalizing structure (3) is a wind-equalizing plate and comprises a plate body and a plurality of ventilation holes arranged on the plate body.
2. The nursery house tempering system of claim 1, wherein said diverter valve is a four way valve.
3. A nursery house tempering system according to claim 1, characterized in that said air duct (7) is provided with a humidifier (4) for adjusting the air humidity inside the nursery house (1).
4. A nursery house tempering system according to claim 3, characterized in that said humidifier (4) is placed in front of the condenser (5) in the air flow direction.
5. A temperature regulating system for a nursery house according to any of claims 1-4, characterized in that the evaporator (8) and the compressor (9) are located outside the nursery house (1).
6. A nursery house tempering system according to claim 1 wherein said condenser (5) is provided with temperature sensors at the front and back to detect return or supply air temperature.
7. A temperature adjusting system for nursery houses according to claim 1, wherein a gas-liquid separator is installed in front of the compressor (9), an oil separator is installed in a gas return pipeline of the compressor (9), and an electric heating belt is installed on the outer wall of the compressor (9).
8. A temperature regulating system for nursery houses according to claim 7, wherein a defrosting temperature sensor is provided at the liquid dividing pipe of the evaporator (8).
9. A method for controlling a tempering system of a nursery house according to any of the previous claims 1-8, characterized by controlling a heat transfer medium to flow in a first direction in said evaporator (8) heating the air flow through the air duct (7) when the ambient temperature is below a first set temperature.
10. A control method according to claim 9, characterized by controlling the heat transfer medium to flow in a second direction in the evaporator (8) when the ambient temperature is higher than a second set temperature, cooling the air flow through the air duct (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811580018.8A CN109588165B (en) | 2018-12-24 | 2018-12-24 | Temperature adjusting system of nursery greenhouse and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811580018.8A CN109588165B (en) | 2018-12-24 | 2018-12-24 | Temperature adjusting system of nursery greenhouse and control method thereof |
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| CN109588165A CN109588165A (en) | 2019-04-09 |
| CN109588165B true CN109588165B (en) | 2022-12-13 |
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| CN113016448A (en) * | 2021-03-11 | 2021-06-25 | 江苏春秋农业设施有限公司 | Artificial climate chamber body device |
| CN114679990B (en) * | 2022-03-29 | 2023-04-25 | 华南农业大学 | Tobacco is heating device for seedling raising canopy |
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| CN205375246U (en) * | 2016-01-19 | 2016-07-06 | 内蒙古工业大学 | Warmhouse booth intelligence control system |
| CN205783959U (en) * | 2016-07-11 | 2016-12-07 | 青海鑫瑞新能源技术开发有限公司 | A kind of net for air-source heat pump units for vegetables and fruits booth |
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