CN109362427B - Energy-saving greenhouse constant temperature system and control method thereof - Google Patents
Energy-saving greenhouse constant temperature system and control method thereof Download PDFInfo
- Publication number
- CN109362427B CN109362427B CN201811232902.2A CN201811232902A CN109362427B CN 109362427 B CN109362427 B CN 109362427B CN 201811232902 A CN201811232902 A CN 201811232902A CN 109362427 B CN109362427 B CN 109362427B
- Authority
- CN
- China
- Prior art keywords
- air
- water
- heat
- greenhouse
- air inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- A01G9/245—Conduits for heating by means of liquids, e.g. used as frame members or for soil heating
-
- 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
-
- 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
Abstract
The invention discloses an energy-saving greenhouse constant temperature system and a control method thereof, wherein the interior of a greenhouse is communicated with the interior of a heat pump unit body to form a circulating air path, when the heat pump unit is in heating operation, hot air in the greenhouse enters the heat pump unit through a first air inlet, the hot air is cooled by a second heat exchanger to form cold air, and the cold air is returned to the greenhouse under the action of a fan module; when the heat pump unit is in refrigeration operation, cold air in the greenhouse enters the heat pump unit through the first air inlet, the second heat exchanger heats the cold air to form hot air, and the hot air is returned to the greenhouse under the action of the fan module; meanwhile, through the arrangement of a heating waterway, hot water at the upper part of the water tower is sent to a heating heat exchange tube laid at the bottom of the planting basin for radiation heat exchange, so that the bottom of the planting basin is heated. Therefore, the invention can meet the constant temperature requirement of refrigerating and heating in the greenhouse, has high energy efficiency and obvious energy-saving effect, and can ensure the normal operation of the heat pump unit.
Description
Technical Field
The invention belongs to the technical field of greenhouse constant temperature, and particularly relates to an energy-saving greenhouse constant temperature system and a control method thereof.
Background
In the past greenhouse constant temperature system generally adopts gas boiler to heat, then carries out upper and lower radiation heat supply through the radiant tube of laying from top to bottom of greenhouse, but this kind of constant temperature mode just must exist the temperature difference because of radiation heat transfer needs big difference in temperature in the greenhouse to the heat supply temperature in the unable greenhouse of guaranteeing is even, has influenced constant temperature effect, heats with gas boiler moreover, and the energy consumption is big not energy-conserving.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy-saving greenhouse constant temperature system and a control method thereof, which can meet the constant temperature requirement in the greenhouse, have high energy efficiency and obvious energy-saving effect, and can ensure the normal operation of a heat pump unit.
In order to solve the technical problems, one aspect of the invention provides an energy-saving greenhouse constant temperature system, which comprises a greenhouse, a heat pump unit, a water tower, a unit waterway and a heating waterway, wherein the heat pump unit is arranged outside the greenhouse and is provided with a first air outlet and a first air inlet, the first air outlet is communicated with the interior of the greenhouse through an air inlet pipe, and the first air inlet is communicated with the interior of the greenhouse through a return pipe; the unit waterway comprises a first water inlet pipe and a first water outlet pipe, one end of the first water inlet pipe is communicated with the bottom of the water tower, the other end of the first water inlet pipe is communicated with the water inlet of the first heat exchanger, one end of the first water outlet pipe is communicated with the bottom of the water tower, the other end of the first water outlet pipe is communicated with the water outlet of the first heat exchanger, and a first water pump is arranged on the first water inlet pipe or the first water outlet pipe; the bottom of planting the basin is provided with a heating heat exchange tube, the heating water route includes second inlet tube and second outlet pipe, the one end of second inlet tube with the upper portion intercommunication of water tower, the other end of second inlet tube with the water inlet intercommunication of heating heat exchange tube, the one end of second outlet pipe with the bottom intercommunication of water tower, the other end of second outlet pipe with the delivery port intercommunication of heating heat exchange tube, the second inlet tube or be equipped with the second water pump on the second outlet pipe.
As the preferable scheme of the energy-saving greenhouse constant temperature system, the unit waterway further comprises a third water inlet pipe, a first three-way proportional regulating valve is arranged on the first water inlet pipe, one end of the third water inlet pipe is communicated with the first three-way proportional regulating valve, the other end of the third water inlet pipe is communicated with the upper part of the water tower, and the water outlet of the first three-way proportional regulating valve is communicated with one side of the negative pressure of the first water pump.
As the preferable scheme of the energy-saving greenhouse constant temperature system, a second three-way proportional regulating valve is arranged on the second water inlet pipe, the second water inlet pipe is communicated with the second water outlet pipe through the second three-way proportional regulating valve, and the water outlet of the second three-way proportional regulating valve is communicated with one side of the negative pressure of the second water pump.
As the preferable scheme of the energy-saving greenhouse constant temperature system, the heat pump unit is provided with a compressor, a first heat exchanger, a second heat exchanger and a fan module, the fan module divides the inner cavity of the machine body of the heat pump unit into an air outlet cavity and an air inlet cavity, the negative pressure side of the fan module is communicated with the air inlet cavity, the positive pressure side of the fan module is communicated with the air outlet cavity, the compressor, the first heat exchanger and the second heat exchanger are fixedly arranged in the air inlet cavity, the second heat exchanger is close to the negative pressure side of the fan module, the air inlet cavity is provided with the first air inlet communicated with the interior of the greenhouse, the first air inlet is positioned below the second heat exchanger, the air outlet cavity is provided with the first air outlet communicated with the interior of the greenhouse, the first air inlet is provided with a first air inlet valve, and the first air outlet is provided with a first air outlet valve.
As the preferable scheme of the energy-saving greenhouse constant temperature system, the air inlet cavity is provided with a second air inlet communicated with outside air, the second air inlet is positioned below the second heat exchanger, the air outlet cavity is provided with a second air outlet communicated with the outside air, the second air inlet is provided with a second air inlet valve, and the second air outlet is provided with a second air outlet valve.
As the preferable scheme of the energy-saving greenhouse constant temperature system, the inside of the greenhouse is provided with the jet fan, and the jet fan is arranged at the upper part of the greenhouse and is used for pushing air in the greenhouse to flow.
As the preferable scheme of the energy-saving greenhouse constant temperature system, the water tower is provided with an insulating layer.
As the preferable scheme of the energy-saving greenhouse constant temperature system, at least one greenhouse is arranged, and each greenhouse is respectively provided with one heat pump unit.
In addition, another aspect of the invention provides a control method of the energy-saving greenhouse constant temperature system applying the above matters,
when heating the interior of the greenhouse: the heat pump unit is in refrigeration operation, a first air inlet valve on a first air inlet and a first air outlet valve on a first air outlet are opened, cold air of the greenhouse enters the heat pump unit through an air return pipe and passes through the first air inlet, the first heat exchanger evaporates by absorbing heat of water in the water tower, the second heat exchanger condenses and gives off heat and exchanges heat with cold air entering the heat pump unit, after the cold air is heated into hot air, the hot air is uniformly conveyed to the greenhouse heat after entering a jet fan through the first air outlet and an air inlet pipe through the fan module, meanwhile, under the traction of a second water pump, the upper hot water of the water tower enters the heating heat exchange pipe through a second water inlet pipe to perform radiation heat exchange, so that the bottom heating of a planting pot is realized, and after the air in the greenhouse reaches a heating target temperature, the operation of the heat pump unit is stopped;
when refrigerating the interior of the greenhouse: the heat pump unit is in heating operation, opens first air inlet valve and the first air outlet valve on the first air intake, and the hot air of big-arch shelter passes through the return air pipe first air intake gets into the heat pump unit, first heat exchanger condensation heat dissipation gives the heat the water tower heat accumulation, the second heat exchanger evaporates through the heat in the hot air that absorbs the heat entering the heat pump unit, and after the hot air was cooled down to cold air by the absorbed heat, the cold air passes through the fan module passes through after first air outlet and the air-supply line get into the efflux fan evenly the transportation for the big-arch shelter cooling, after the air in the big-arch shelter reached refrigeration target temperature, stop heat pump unit operation.
As a preferable scheme of the control method of the energy-saving greenhouse constant temperature system, when heating the interior of the greenhouse, the upper hot water of the water tower is mixed with the lower cold water of the water tower through the first three-way proportional control valve, and when the temperature is mixed to a temperature suitable for evaporation of the first heat exchanger, the mixture enters the interior of the first heat exchanger through the first three-way proportional control valve to exchange heat.
As the preferable scheme of the control method of the energy-saving greenhouse constant temperature system, when heating is performed inside the greenhouse, the upper hot water of the water tower is mixed with the cold water in the second water outlet pipe through the second three-way proportional control valve, and when the temperature is mixed to the temperature suitable for the bottom of the planting pot, the mixture enters the heating heat exchange pipe through the second three-way proportional control valve to exchange heat.
As the preferable scheme of the control method of the energy-saving greenhouse constant temperature system, when the temperature of the air in the greenhouse is constant, and the heat of the heating heat exchange tube is insufficient or the heat storage capacity of the water tower is insufficient, a water tower heat storage mode is started, a heat pump unit is in heating operation, the second air inlet valve and the second air outlet valve are opened, the first air inlet valve and the first air outlet valve are closed, fresh air enters the air inlet cavity through the second air inlet, the fresh air is blown out through the second air outlet after providing heat for evaporation of the second heat exchanger, the first heat exchanger condenses and emits heat, cold water in the water tower enters the inside of the first heat exchanger through the first water inlet pipe, and after the cold water exchanges heat and is heated into hot water, the hot water enters the water tower through the first water outlet pipe to store heat.
Compared with the prior art, the energy-saving greenhouse constant temperature system and the control method thereof have the following beneficial effects:
(1) According to the invention, the compressor, the first heat exchanger, the second heat exchanger and the fan module are arranged in the machine body, the interior of the greenhouse is communicated with the interior of the machine body through the arrangement of the first air inlet and the first air outlet, and a circulating air path is formed; when the heat pump unit is in refrigeration operation, cold air in the greenhouse enters the heat pump unit through the first air inlet, the cold air is heated by the second heat exchanger to form hot air, and the hot air is uniformly returned to the greenhouse under the action of the fan module and the jet fan, so that the purpose of heating is achieved; therefore, the invention can meet the requirements of refrigerating and heating in the greenhouse, thereby realizing the constant temperature requirement of the greenhouse; the energy efficiency is high and the energy saving effect is obvious; and because of the arrangement of the water tower and the unit waterway, the heat pump unit can generate better heat exchange effect with the first heat exchanger when in operation, and the normal operation of the heat pump unit is ensured.
(2) According to the invention, through the arrangement of the heating waterway, hot water at the upper part of the water tower is sent to the heating heat exchange tube paved at the bottom of the planting basin for radiation heat exchange, so that the bottom of the planting basin is heated, the soil temperature is ensured, an omnibearing greenhouse effect is formed with hot air output by the heat pump unit, the temperature is uniform, and the constant temperature effect is improved.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic diagram of a structure of an energy-saving greenhouse constant temperature system provided by the invention;
fig. 2 is a schematic structural view of the heat pump unit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, the preferred embodiment of the energy-saving greenhouse constant temperature system provided by the invention comprises a greenhouse 1, a heat pump unit 2, a water tower 3, a unit waterway 4 and a heating waterway 5.
The heat pump unit 2 is arranged outside the greenhouse 1, the heat pump unit 2 is provided with a compressor 6, a first heat exchanger 7, a second heat exchanger 8, a fan module 9, a first air outlet 10 and a first air inlet 11, the inner cavity of the heat pump unit 2 is divided into an air outlet cavity 24 and an air inlet cavity 25 by the fan module 9, the negative pressure side of the fan module 9 is communicated with the air inlet cavity 25, the positive pressure side of the fan module 9 is communicated with the air outlet cavity 24, the compressor 6, the first heat exchanger 7 and the second heat exchanger 8 are fixedly arranged in the air inlet cavity 25, the second heat exchanger 8 is close to the negative pressure side of the fan module 9, the air inlet cavity 25 is provided with the first air inlet 11, the first air inlet 11 is positioned below the second heat exchanger 8, and the first air inlet 11 is communicated with the interior of the greenhouse 1 through a return air pipe 13; the air outlet cavity 24 is provided with the first air outlet 10, the first air outlet 10 is communicated with the interior of the greenhouse 1 through the air inlet pipe 12, the first air inlet 11 is provided with a first air inlet valve 26, and the first air outlet 10 is provided with a first air outlet valve 27.
The unit waterway 4 comprises a first water inlet pipe 14 and a first water outlet pipe 15, one end of the first water inlet pipe 14 is communicated with the bottom of the water tower 3, the other end of the first water inlet pipe 14 is communicated with the water inlet of the first heat exchanger 7, one end of the first water outlet pipe 15 is communicated with the bottom of the water tower 3, the other end of the first water outlet pipe 15 is communicated with the water outlet of the first heat exchanger 7, and a first water pump 16 is arranged on the first water inlet pipe 14 or the first water outlet pipe 15.
The heating waterway 5 comprises a second water inlet pipe 17 and a second water outlet pipe 18, a heating heat exchange pipe 32 is arranged at the bottom of a planting basin, one end of the second water inlet pipe 17 is communicated with the upper part of the water tower 3, the other end of the second water inlet pipe 17 is communicated with a water inlet of the heating heat exchange pipe 32, one end of the second water outlet pipe 18 is communicated with the bottom of the water tower 3, the other end of the second water outlet pipe 18 is communicated with a water outlet of the heating heat exchange pipe 32, and a second water pump 19 is arranged on the second water inlet pipe 17 or the second water outlet pipe 18.
Therefore, the energy-saving greenhouse constant temperature system provided by the invention has the advantages that the compressor 6, the first heat exchanger 7, the second heat exchanger 8 and the fan module 9 are arranged in the greenhouse, the interior of the greenhouse 1 is communicated with the interior of the greenhouse and forms a circulating air path through the arrangement of the first air inlet 11 and the first air outlet 10, when the heat pump unit is in heating operation, hot air in the greenhouse 1 enters the heat pump unit 2 (namely the air inlet cavity 25) through the first air inlet 11, the second heat exchanger 8 cools the hot air to form cold air, and the cold air is uniformly returned into the greenhouse 1 under the action of the fan module 9, so that the aim of refrigeration is achieved; when the heat pump unit is in refrigeration operation, cold air in the greenhouse 1 enters the heat pump unit 2 (namely an air inlet cavity 25) through the first air inlet 11, the cold air is heated by the second heat exchanger 8 to form hot air, and the hot air is uniformly returned to the greenhouse 1 under the action of the fan module 9, so that the purpose of heating is achieved; therefore, the invention can meet the requirements of refrigerating and heating in the greenhouse, thereby realizing the constant temperature requirement of the greenhouse; high energy efficiency and obvious energy-saving effect.
It should be noted that, due to the arrangement of the water tower 3 and the unit waterway 4, the heat pump unit 2 can generate better heat exchange effect with the first heat exchanger 7 when running, thus ensuring the normal running of the heat pump unit; and because of the setting of heating water route 5, can send the hot water of water tower 3 upper portion to lay in the heating heat exchange tube 32 of planting the basin bottom and carry out the radiation heat transfer, realize the bottom heating for planting the basin, ensure soil temperature, form the all-round greenhouse effect with the hot air of heat pump set output, the temperature is even, has promoted constant temperature effect.
Illustratively, the unit waterway 4 further includes a third water inlet pipe 21, the first water inlet pipe 14 is provided with a first three-way proportional control valve 22, one end of the third water inlet pipe 21 is communicated with the first three-way proportional control valve 22, the other end of the third water inlet pipe 21 is communicated with the upper portion of the water tower 3, and the water outlet of the first three-way proportional control valve 22 is communicated with the negative pressure side of the first water pump 16. Therefore, the arrangement of the first three-way proportional control valve 22 can enable the upper hot water of the water tower 3 to be mixed with the lower cold water of the water tower 3, and when the temperature is mixed to a temperature suitable for the evaporation of the heat pump unit 2, the mixture enters the first heat exchanger 7 through the first three-way proportional control valve 22 to exchange heat, so that the safe operation of the heat pump unit is ensured.
The second water inlet pipe 17 is illustratively provided with a second three-way proportional control valve 23, the second water inlet pipe 17 is communicated with the second water outlet pipe 18 through the second three-way proportional control valve 23, and the water outlet of the second three-way proportional control valve 23 is communicated with the negative pressure side of the second water pump 19. Therefore, the arrangement of the second three-way proportional control valve 23 can enable the upper hot water of the water tower 3 to be mixed with cold water (namely water subjected to heat exchange through the heating heat exchange pipe 32) in the second water outlet pipe 18, and when the temperature is mixed to the temperature suitable for the bottom of the planting pot, the mixture enters the interior of the heating heat exchange pipe 32 through the second three-way proportional control valve 23 to exchange heat, so that the heat of the water tower is fully utilized, and the high-efficiency energy-saving operation of the constant-temperature heat pump unit is realized.
Illustratively, the air inlet cavity 25 is provided with a second air inlet 28 communicated with the outside air, the second air inlet 28 is located below the second heat exchanger 8, the air outlet cavity 24 is provided with a second air outlet 29 communicated with the outside air, the second air inlet 28 is provided with a second air inlet valve 30, and the second air outlet 29 is provided with a second air outlet valve 31. Therefore, according to the invention, through the arrangement of the second air inlet 28 and the second air outlet 29, the outside air is communicated with the inside of the machine body to form a circulating air path, when the air in the greenhouse 1 realizes constant temperature and the heat storage capacity of the water tower 3 is insufficient, the water tower heat storage mode is started, the heat pump unit is in heating operation, the second air inlet valve 30 and the second air outlet valve 31 are opened, the first air inlet valve 26 and the first air outlet valve 27 are closed, fresh air enters the air inlet cavity 25 through the second air inlet 28, the fresh air provides heat for the evaporation of the second heat exchanger 8 and then is blown out through the second air outlet 29, the first heat exchanger 7 condenses and emits heat, cold water in the water tower 3 enters the inside of the first heat exchanger 7 through the first water inlet pipe 14, and after the cold water exchanges heat and is heated into hot water, the hot water enters the water tower 3 through the first water outlet pipe 15, the heat is stored, so that the temperature of the water tower is kept within a set range, and the high-efficiency energy-saving operation of the constant temperature heat pump unit is realized; particularly, in winter, the heat pump unit is in refrigeration operation, and the first heat exchanger 7 needs to absorb the heat of the water in the water tower 3 for evaporation, so that the heat storage mode of the water tower is started to ensure that the heat pump unit can normally operate in a low-temperature environment.
Illustratively, the water tower 3 is provided with a heat-insulating layer in order to ensure that the temperature of the water in the water tower is not too high as a result of the outside air temperature.
The inside of the greenhouse 1 is provided with the jet fan 20, and the jet fan 20 is arranged on the upper portion of the greenhouse 1, so that air flow in the greenhouse is promoted due to the characteristic of long blowing stroke of the jet fan, and meanwhile, the air return air draft of the heat pump unit is combined, so that micro convection is formed in the greenhouse, constant temperature uniformity in the greenhouse is guaranteed, and constant temperature effect is improved.
The greenhouse 1 is provided with at least one heat pump unit 2, so that each greenhouse can realize constant temperature. In this embodiment, two greenhouses 1 are provided, and two heat pump units 2 are also provided.
In addition, another aspect of the invention provides a control method of the energy-saving greenhouse constant temperature system applying the above matters,
when heating the interior of the greenhouse: the heat pump unit is in refrigeration operation, the controller controls to open the first air inlet valve 26 and the first air outlet valve 27, close the second air inlet valve 30 and the second air outlet valve 31, cold air of the greenhouse 1 enters the heat pump unit (namely the air inlet cavity 25) through the first air inlet 10 through the air return pipe 13, the first heat exchanger 7 evaporates through absorbing heat of water in the water tower 3, the second heat exchanger 8 condenses to emit heat and exchanges heat with cold air entering the heat pump unit (namely the air inlet cavity 25), after the cold air is heated into hot air, the hot air is uniformly conveyed to the heat of the greenhouse 1 after entering the jet fan 20 through the first air outlet 10 and the air inlet pipe 12 through the fan module 9, meanwhile, hot water at the upper part of the water tower 3 enters the heating heat exchange pipe 32 through the second water inlet pipe 17 under the traction of the second water pump 19 to perform radiation heat exchange, so that bottom heating of the planting pot is realized, and after the air in the greenhouse 1 reaches a target temperature for heating, the heat pump unit is stopped to operate;
when refrigerating the interior of the greenhouse: the heat pump unit is in heating operation, the controller controls to open the first air inlet valve 26 and the first air outlet valve 27, close the second air inlet valve 30 and the second air outlet valve 31, hot air in the greenhouse 1 enters the heat pump unit (namely the air inlet cavity 25) through the first air inlet 11 through the air return pipe 13, the first heat exchanger 7 condenses and dissipates heat and transfers heat to the water tower 3 for heat storage, the second heat exchanger 8 absorbs the heat in the hot air entering the heat pump unit (namely the air inlet cavity 25) for evaporation, the hot air is cooled to cool air after the heat is absorbed, the cool air is evenly conveyed to the greenhouse 1 for cooling after entering the jet fan 20 through the fan module 9 through the first air outlet 10 and the air inlet pipe 12, and the operation of the heat pump unit is stopped after the air in the greenhouse 1 reaches the refrigerating target temperature.
Therefore, the control method of the greenhouse constant-temperature heat pump unit can meet the constant-temperature requirements of refrigerating and heating in the greenhouse. The water tower and the unit waterway are arranged, so that a good heat exchange effect can be generated between the heat pump unit and the first heat exchanger when the heat pump unit operates, and the heat pump unit is ensured to normally operate; and because of the setting of heating water route, can send the hot water of water tower upper portion to lay in the heating heat exchange tube of planting basin bottom and carry out the radiation heat transfer, realize the bottom heating for planting the basin, ensure soil temperature, form the all-round greenhouse effect with the hot air of heat pump unit output, the temperature is even, has promoted constant temperature effect.
Illustratively, when heating the interior of the greenhouse, the hot water at the upper part of the water tower 3 may be mixed with the cold water at the lower part of the water tower 3 through the first three-way proportional control valve 22, and when the temperature is mixed to a temperature suitable for evaporation of the heat pump unit 2, the hot water enters the interior of the first heat exchanger 7 through the first three-way proportional control valve 22 to exchange heat, so that the safe operation of the heat pump unit is ensured.
For example, when heating is performed inside the greenhouse, the hot water at the upper part of the water tower 3 may be mixed with the cold water in the second water outlet pipe 18 through the second three-way proportional control valve 23, and when the temperature is mixed to a temperature suitable for the bottom of the planting pot, the hot water enters the heating heat exchange pipe 32 through the second three-way proportional control valve 23 to exchange heat, so that the heat of the water tower 3 is more fully utilized, and the high-efficiency energy-saving operation of the constant-temperature heat pump unit is realized.
For example, when the temperature of the air in the greenhouse is constant, and the heat of the heating heat exchange tube 32 is insufficient or the heat storage capacity of the water tower 3 is insufficient, a water tower heat storage mode is started, the heat pump unit is in heating operation, the second air inlet valve 30 and the second air outlet valve 31 are opened, the first air inlet valve 26 and the first air outlet valve 27 are closed, fresh air enters the air inlet cavity 25 through the second air inlet 28, the fresh air provides heat for the evaporation of the second heat exchanger 8 and then is blown out through the second air outlet 29, the first heat exchanger 7 condenses and emits heat, cold water in the water tower 3 enters the first heat exchanger 7 through the first water inlet tube 14, and after the cold water exchanges heat and is heated into hot water, the hot water enters the water tower 3 through the first water outlet tube 15 to store heat. In this way, through the arrangement of the second air inlet 28 and the second air outlet 29, the switching of the air valve is controlled by the controller, so that the temperature of the water in the water tower 3 is kept within the range of the set value, and the high-efficiency energy-saving operation of the constant-temperature heat pump unit is realized; particularly, in winter, the heat pump unit is in refrigeration operation, and the first heat exchanger 7 needs to absorb the heat of the water in the water tower 3 for evaporation, so that the heat storage mode of the water tower is started to ensure that the heat pump unit can normally operate in a low-temperature environment.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (8)
1. The energy-saving greenhouse constant temperature system is characterized by comprising a greenhouse, a heat pump unit, a water tower, a unit waterway and a heating waterway, wherein the heat pump unit is arranged outside the greenhouse and is provided with a first air outlet and a first air inlet, the first air outlet is communicated with the interior of the greenhouse through an air inlet pipe, and the first air inlet is communicated with the interior of the greenhouse through an air return pipe; the unit waterway comprises a first water inlet pipe, a first water outlet pipe and a third water inlet pipe, one end of the first water inlet pipe is communicated with the bottom of the water tower, the other end of the first water inlet pipe is communicated with a water inlet of a first heat exchanger of the heat pump unit, one end of the first water outlet pipe is communicated with the bottom of the water tower, the other end of the first water outlet pipe is communicated with a water outlet of the first heat exchanger of the heat pump unit, and a first water pump is arranged on the first water inlet pipe or the first water outlet pipe; a heating heat exchange tube is arranged at the bottom of the planting basin, the heating waterway comprises a second water inlet tube and a second water outlet tube, one end of the second water inlet tube is communicated with the upper part of the water tower, the other end of the second water inlet tube is communicated with a water inlet of the heating heat exchange tube, one end of the second water outlet tube is communicated with the bottom of the water tower, the other end of the second water outlet tube is communicated with a water outlet of the heating heat exchange tube, and a second water pump is arranged on the second water inlet tube or the second water outlet tube; the first water inlet pipe is provided with a first three-way proportional regulating valve, one end of the third water inlet pipe is communicated with the first three-way proportional regulating valve, the other end of the third water inlet pipe is communicated with the upper part of the water tower, and the water outlet of the first three-way proportional regulating valve is communicated with one side of the negative pressure of the first water pump; the second water inlet pipe is provided with a second three-way proportional regulating valve, the second water inlet pipe is communicated with the second water outlet pipe through the second three-way proportional regulating valve, and the water outlet of the second three-way proportional regulating valve is communicated with one side of the negative pressure of the second water pump.
2. The energy-saving greenhouse constant temperature system according to claim 1, wherein the heat pump unit is provided with a compressor, a first heat exchanger, a second heat exchanger and a fan module, the fan module divides an inner cavity of a machine body of the heat pump unit into an air outlet cavity and an air inlet cavity, a negative pressure side of the fan module is communicated with the air inlet cavity, a positive pressure side of the fan module is communicated with the air outlet cavity, the compressor, the first heat exchanger and the second heat exchanger are fixedly installed in the air inlet cavity, the second heat exchanger is close to the negative pressure side of the fan module, the air inlet cavity is provided with a first air inlet communicated with the interior of the greenhouse, the first air inlet is positioned below the second heat exchanger, the air outlet cavity is provided with a first air outlet communicated with the interior of the greenhouse, the first air inlet is provided with a first air inlet valve, and the first air outlet is provided with a first air outlet valve.
3. The energy-saving greenhouse constant temperature system according to claim 2, wherein the air inlet cavity is provided with a second air inlet communicated with the outside air, the second air inlet is positioned below the second heat exchanger, the air outlet cavity is provided with a second air outlet communicated with the outside air, the second air inlet is provided with a second air inlet valve, and the second air outlet is provided with a second air outlet valve.
4. The energy-saving greenhouse constant temperature system according to claim 1, wherein a jet fan is arranged in the greenhouse, and the jet fan is arranged at the upper part of the greenhouse and is used for pushing air in the greenhouse to flow.
5. The energy efficient greenhouse constant temperature system according to claim 1, wherein the water tower is provided with an insulation layer.
6. The energy-saving greenhouse constant temperature system according to any one of claims 1 to 5, wherein at least one greenhouse is provided, and each greenhouse is respectively provided with one heat pump unit.
7. A control method using the energy-saving greenhouse constant temperature system as claimed in any one of claims 1 to 6, characterized in that,
when heating the interior of the greenhouse: the heat pump unit is in refrigeration operation, a first air inlet valve on a first air inlet and a first air outlet valve on a first air outlet are opened, cold air of the greenhouse enters the heat pump unit through an air return pipe and passes through the first air inlet, the first heat exchanger evaporates by absorbing heat of water in the water tower, the second heat exchanger condenses and gives off heat and exchanges heat with cold air entering the heat pump unit, after the cold air is heated into hot air, the hot air is uniformly conveyed to the greenhouse heat after entering a jet fan through the first air outlet and an air inlet pipe through the fan module, meanwhile, under the traction of a second water pump, the upper hot water of the water tower enters the heating heat exchange pipe through a second water inlet pipe to perform radiation heat exchange, so that the bottom of a planting pot is heated, and after the air in the greenhouse reaches a heating target temperature, the operation of the heat pump unit is stopped; the upper hot water of the water tower is mixed with the lower cold water of the water tower through the first three-way proportional control valve, and enters the first heat exchanger through the first three-way proportional control valve to exchange heat when the temperature is mixed to a temperature suitable for evaporation of the first heat exchanger; the upper hot water of the water tower is mixed with cold water in the second water outlet pipe through the second three-way proportional control valve, and enters the heating heat exchange pipe through the second three-way proportional control valve to exchange heat when the temperature is mixed to the temperature suitable for the bottom of the planting pot;
when refrigerating the interior of the greenhouse: the heat pump unit is in heating operation, the first air inlet valve and the first air outlet valve are opened, hot air of the greenhouse enters the heat pump unit through the first air inlet through the air return pipe, the heat is transferred to the water tower for heat storage through condensation and heat dissipation of the first heat exchanger, the second heat exchanger evaporates through heat in the hot air which enters the heat pump unit by absorption, the hot air is cooled to cold air by the heat absorption, the cold air passes through the fan module, and the cold air is uniformly conveyed to the greenhouse for cooling after entering the jet fan through the first air outlet and the air inlet pipe, and the operation of the heat pump unit is stopped after the air in the greenhouse reaches the refrigerating target temperature.
8. The control method of the energy-saving greenhouse constant temperature system according to claim 7, wherein the body cavity of the heat pump unit is divided into an air outlet cavity and an air inlet cavity, the air inlet cavity is provided with a second air inlet communicated with outside air, the second air inlet is positioned below the second heat exchanger, the air outlet cavity is provided with a second air outlet communicated with outside air, the second air inlet is provided with a second air inlet valve, and the second air outlet is provided with a second air outlet valve;
when the temperature of the air in the greenhouse is constant, and the heat of the heating heat exchange pipe is insufficient or the heat storage capacity of the water tower is insufficient, a water tower heat storage mode is started, the heat pump unit is in heating operation, the second air inlet valve and the second air outlet valve are opened, the first air inlet valve and the first air outlet valve are closed, fresh air enters the air inlet cavity through the second air inlet, the fresh air is supplied to the evaporation of the second heat exchanger and then blown out through the second air outlet, the first heat exchanger condenses and emits heat, cold water in the water tower enters the first heat exchanger through the first water inlet pipe, and after the cold water exchanges heat and is heated to hot water, the hot water enters the water tower through the first water outlet pipe to store the heat of the water tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232902.2A CN109362427B (en) | 2018-10-22 | 2018-10-22 | Energy-saving greenhouse constant temperature system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232902.2A CN109362427B (en) | 2018-10-22 | 2018-10-22 | Energy-saving greenhouse constant temperature system and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109362427A CN109362427A (en) | 2019-02-22 |
| CN109362427B true CN109362427B (en) | 2023-09-15 |
Family
ID=65401627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811232902.2A Active CN109362427B (en) | 2018-10-22 | 2018-10-22 | Energy-saving greenhouse constant temperature system and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109362427B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110064471A (en) * | 2019-04-18 | 2019-07-30 | 北京见信科技有限公司 | A kind of thermostatic type fuel pulverizing plant |
| CN114893949B (en) * | 2022-03-31 | 2024-03-08 | 北京航天发射技术研究所 | Vehicle-mounted temperature adjusting unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822185A (en) * | 2010-03-26 | 2010-09-08 | 烟台蓝德空调工业有限责任公司 | Vegetable greenhouse warning system by heat pump unit |
| CN101943504A (en) * | 2010-09-27 | 2011-01-12 | 江苏天舒电器有限公司 | Heat pump capillary radiant constant temperature hot-water system and control method thereof |
| CN201911078U (en) * | 2010-12-03 | 2011-08-03 | 福建省农业科学院土壤肥料研究所 | Air conditioning equipment in edible fungus cultivation room |
| CN204014640U (en) * | 2014-01-22 | 2014-12-17 | 乌兰察布市源通潜热应用技术开发有限公司 | Realize the energy-saving heating system that cold district green house solanaceous vegetables is produced |
| CN106857110A (en) * | 2017-03-22 | 2017-06-20 | 天津大学 | A kind of agricultural greenhouse plant seasonal comprehensive temperature control system and temperature control method |
| CN209359161U (en) * | 2018-10-22 | 2019-09-10 | 广东芬尼克兹节能设备有限公司 | A kind of energy conservation greenhouse constant temperature system |
-
2018
- 2018-10-22 CN CN201811232902.2A patent/CN109362427B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822185A (en) * | 2010-03-26 | 2010-09-08 | 烟台蓝德空调工业有限责任公司 | Vegetable greenhouse warning system by heat pump unit |
| CN101943504A (en) * | 2010-09-27 | 2011-01-12 | 江苏天舒电器有限公司 | Heat pump capillary radiant constant temperature hot-water system and control method thereof |
| CN201911078U (en) * | 2010-12-03 | 2011-08-03 | 福建省农业科学院土壤肥料研究所 | Air conditioning equipment in edible fungus cultivation room |
| CN204014640U (en) * | 2014-01-22 | 2014-12-17 | 乌兰察布市源通潜热应用技术开发有限公司 | Realize the energy-saving heating system that cold district green house solanaceous vegetables is produced |
| CN106857110A (en) * | 2017-03-22 | 2017-06-20 | 天津大学 | A kind of agricultural greenhouse plant seasonal comprehensive temperature control system and temperature control method |
| CN209359161U (en) * | 2018-10-22 | 2019-09-10 | 广东芬尼克兹节能设备有限公司 | A kind of energy conservation greenhouse constant temperature system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109362427A (en) | 2019-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104197652B (en) | A kind of two-way airflow apparatus for baking | |
| CN101251285B (en) | Indirect evaporation refrigerating method and device capable of generating cold water and cold wind meanwhile | |
| CN103398433B (en) | The air conditioning system that evaporation cooling, solar energy combine with quasiconductor | |
| CN103712477B (en) | Heat pump heat supply demist water-saving cooling tower | |
| CN106323042B (en) | A kind of low temp heating piece | |
| CN109362427B (en) | Energy-saving greenhouse constant temperature system and control method thereof | |
| CN202452608U (en) | Solution-humidity-regulating all-air unit with total-heat recovery device | |
| CN103982968A (en) | Active radiant panel heat exchange system and heat exchange processing method thereof | |
| CN109373481A (en) | A kind of a heatable brick bed body ventilation and air conditioning that human body is preferentially benefited from and heating system | |
| CN205228013U (en) | Room is baked to solar thermal energy pump | |
| CN106871537B (en) | Integrated machine of refrigerating chamber heat exchange refrigerator and working method thereof | |
| CN101889713A (en) | Solar-heat pump combined food air thawing system and thawing method | |
| KR20080041344A (en) | A electric fan for warm and cold wind | |
| CN103267329A (en) | Refrigeration, supply heat and hot water system capable of performing solar evaporative cooling and capillary radiation | |
| CN204165327U (en) | A kind of two-way airflow apparatus for baking | |
| CN203837184U (en) | Active type radiant panel heat exchange system | |
| CN105890084A (en) | Hot water supply system and air conditioner with same | |
| CN108507216A (en) | A kind of superelevation grain depot cold recovery equipment and with the grain storage system of the equipment | |
| CN203375588U (en) | Evaporative cooling, solar energy and semiconductor integrated air-conditioner | |
| CN209359161U (en) | A kind of energy conservation greenhouse constant temperature system | |
| CN206338898U (en) | A kind of double-cold source fresh air handling unit with recuperation of heat | |
| CN113847661B (en) | Energy-saving system of air conditioner for alcoholization warehouse of cigarette factory | |
| CN105509200A (en) | Independent fresh air dehumidifying device capable of enhancing heat dissipation | |
| CN103528154A (en) | Solution humidity-regulation air treatment system utilizing geothermal hot spring resources and treatment method thereof | |
| CN109282406B (en) | Self-balancing ground radiation cooling system and cooling control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |