Heat preservation air conditioner, control method thereof, storage medium and electronic equipment

Abstract

The invention discloses a heat preservation air conditioner, a control method thereof, a storage medium and electronic equipment. The heat preservation air conditioner is applied to the greenhouse and comprises a gas isolation chamber arranged at the top of the greenhouse, and the inner wall or the outer wall of the gas isolation chamber is coated with a heat preservation material; the first air opening is formed in the upper space in the greenhouse and communicated with the gas isolation chamber, the first air opening is opened in the daytime period to enable high-temperature gas to enter the gas isolation chamber, the first air opening is closed in the transition period to enable the high-temperature gas to be sealed in the gas isolation chamber, and the first air opening is opened in the night period to enable the high-temperature gas to escape from the first air opening; the second air opening is formed in the bottom space in the greenhouse, the second air opening communicates with the first air opening through a first air duct, and an air circulation fan is arranged in the first air duct. By means of the system, heat energy can be recycled, heat is supplied to the greenhouse at night through the recycled heat energy, and energy waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and in particular to a heat preservation air conditioner, a control method thereof, a storage medium and an electronic device. Background Art

[0002] Greenhouse is a general term for buildings that use lighting covering materials as all or part of the enclosure structure and can be used to cultivate plants in winter or other seasons that are not suitable for outdoor growth of plants. After the solar radiation, which is mainly short-wave radiation, enters the greenhouse through the lighting materials, it increases the indoor ground temperature and air temperature and converts into long-wave radiation. The long-wave radiation is blocked indoors by the greenhouse cover, causing heat accumulation, so that the temperature in the greenhouse is higher than the outdoor environment temperature. This process is called the greenhouse effect. The greenhouse is where people use the greenhouse effect to increase the indoor temperature, create and maintain a suitable environment for crop growth, and achieve the goals of off-season crop production, increase crop yields, increase productivity, and reduce environmental control energy consumption. The temperature rise in the greenhouse caused by the greenhouse effect in winter is beneficial to plant growth and can reduce the environmental control energy consumption of the greenhouse. For the cold winter in the north, the greenhouse provides the possibility of supplying fruits and vegetables in winter.

[0003] In current greenhouses, the temperature is lower at night, which requires an increased load on heat exchange equipment and increased energy consumption. However, the solar radiation heat is higher during the day, so the temperature inside the greenhouse will be higher, even higher than expected. This part of heat energy cannot be effectively collected and utilized, resulting in energy waste.

[0004] In view of the problem that the temperature difference between day and night in the greenhouse in the prior art is large, the daytime solar radiation heat cannot be effectively collected and utilized, resulting in energy waste, and no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a heat preservation air conditioner, a control method thereof, a storage medium and an electronic device to solve the problem in the prior art that the temperature difference between day and night in a greenhouse is large, and the daytime solar radiation heat cannot be effectively collected and utilized, resulting in energy waste.

[0006] In order to solve the above technical problems, the present invention provides a heat preservation air conditioner, a control method thereof, a storage medium and an electronic device, wherein the heat preservation air conditioner is applied to a greenhouse, and the heat preservation air conditioner comprises:

[0007] A gas isolation chamber is arranged on the top of the greenhouse, and the inner wall or the outer wall of the gas isolation chamber is covered with a heat-insulating material;

[0008] a first air vent, arranged in the upper space of the greenhouse and connected to the gas isolation chamber, the first air vent is opened during the daytime to allow the high-temperature gas to enter the gas isolation chamber, is closed during the transition period to allow the high-temperature gas to be confined in the gas isolation chamber, and is opened during the nighttime to allow the high-temperature gas to escape from the first air vent;

[0009] The second air outlet is arranged in the bottom space of the greenhouse. The second air outlet is connected with the first air outlet through a first air duct. An air circulation fan is arranged in the first air duct.

[0010] Furthermore, the thermal insulation air conditioner also includes:

[0011] A carbon dioxide generating device, whose outlet end is connected to the second air outlet, is used to generate carbon dioxide and output it into the greenhouse through the second air outlet.

[0012] Furthermore, the thermal insulation air conditioner also includes:

[0013] A first control valve is arranged on the pipeline between the carbon dioxide generating device and the second air outlet.

[0014] Furthermore, the thermal insulation air conditioner also includes:

[0015] An air separation device, whose inlet end is connected to air, and whose outlet ends are respectively connected to the inlet end of the oxygen storage device, the inlet end of the carbon dioxide storage device and the inlet end of the waste gas recovery device;

[0016] The carbon dioxide storage device, the outlet end of which is respectively connected to the first air outlet and the carbon dioxide generating device;

[0017] The third air outlet is arranged in the middle space of the greenhouse, and the outlet end of the oxygen storage device is connected to the third air outlet.

[0018] Furthermore, the thermal insulation air conditioner also includes:

[0019] The second control valve is arranged on the pipeline between the outlet end of the oxygen storage device and the third air outlet.

[0020] Furthermore, the thermal insulation air conditioner also includes a compressor, which forms a circulation system with the condenser, the electronic expansion valve and the evaporator. The condenser is arranged in the second air duct, the second air duct is connected to the fourth air outlet, and the fourth air outlet is arranged in the greenhouse.

[0021] Furthermore, the thermal insulation air conditioner also includes:

[0022] A humidifier is arranged inside the greenhouse.

[0023] Furthermore, the thermal insulation air conditioner also includes:

[0024] a carbon dioxide concentration sensor, disposed in the greenhouse;

[0025] an oxygen concentration sensor, disposed in the greenhouse;

[0026] A humidity sensor is arranged in the greenhouse.

[0027] Furthermore, the thermal insulation air conditioner also includes:

[0028] a pressure sensor disposed in the greenhouse;

[0029] a pressure balancing pipeline disposed between the greenhouse and the atmosphere;

[0030] The pressure balancing valve is arranged on the pressure balancing pipeline.

[0031] The present invention also provides a control method, which is applied to the above-mentioned heat preservation air conditioner, and the control method comprises:

[0032] Determine the current time period; wherein the current time period includes a daytime period, a transition period, and a nighttime period;

[0033] The opening and closing of the first air outlet is controlled according to the current time period, thereby controlling the gas flow direction of the gas isolation chamber.

[0034] Further, the opening and closing of the first air outlet is controlled according to the current time period, thereby controlling the gas flow direction of the gas isolation chamber, including:

[0035] If the current time period is the daytime period, the first air outlet is controlled to be opened to allow the high-temperature gas to enter the gas isolation chamber;

[0036] If the current time period is a transition period, controlling the first air outlet to be closed so that the high-temperature gas is enclosed in the gas isolation chamber;

[0037] If the current time period is night time, the first air vent is controlled to be opened so that the high temperature gas escapes from the first air vent.

[0038] Furthermore, if the current time period is the night time period, the first air vent is controlled to be opened so that the high temperature gas escapes from the first air vent, and the method further includes:

[0039] The second air outlet is controlled to open, and at the same time, the air circulation fan in the first air duct is controlled to open.

[0040] Furthermore, the method further comprises:

[0041] determining a target temperature in the greenhouse, and determining a target carbon dioxide concentration and a target humidity based on the actual temperature in the greenhouse;

[0042] When the target carbon dioxide concentration is greater than the actual carbon dioxide concentration, the first control valve on the pipeline between the carbon dioxide generator and the second air outlet is controlled to open, and then the speed of the carbon dioxide generator to prepare carbon dioxide is controlled by a Kalman filter algorithm according to the target carbon dioxide concentration and the actual carbon dioxide concentration in the greenhouse;

[0043] When the target humidity is greater than the actual humidity, a proportional integral algorithm is used to control the humidity adjustment amount to control the gear position of the humidifier according to the target humidity and the actual humidity in the greenhouse;

[0044] The frequency of the compressor is controlled by adopting a fuzzy control algorithm and a proportional-integral control algorithm according to the actual carbon dioxide concentration, the actual humidity, the actual temperature in the greenhouse and the target temperature.

[0045] Further, according to the target carbon dioxide concentration and the actual carbon dioxide concentration in the greenhouse, a Kalman filter algorithm is used to control the speed of the carbon dioxide generator to produce carbon dioxide, including:

[0046] According to the actual carbon dioxide concentration at the current sampling moment and the previous sampling moment, the actual carbon dioxide concentration at the next moment is predicted based on the Kalman filter algorithm;

[0047] The speed of preparing carbon dioxide by the carbon dioxide generating device is controlled according to the target carbon dioxide concentration and the predicted actual carbon dioxide concentration.

[0048] Further, controlling the speed of preparing carbon dioxide by the carbon dioxide generating device according to the target carbon dioxide concentration and the predicted actual carbon dioxide concentration includes:

[0049] Determine whether the predicted actual carbon dioxide concentration is greater than the target carbon dioxide concentration;

[0050] If yes, controlling the carbon dioxide generating device to stop producing carbon dioxide;

[0051] If not, determine whether the ratio of the predicted actual carbon dioxide concentration to the target carbon dioxide concentration is greater than or equal to a first preset threshold value; if yes, control the carbon dioxide generator to prepare carbon dioxide at a first preset speed; if not, control the carbon dioxide generator to prepare carbon dioxide at a second preset speed; wherein the second preset speed is greater than the first preset speed.

[0052] Further, after determining that the ratio of the predicted actual carbon dioxide concentration to the target carbon dioxide concentration is greater than or equal to the first preset threshold, the method further includes:

[0053] The first control valve on the pipeline between the carbon dioxide generating device and the second air outlet is controlled to be closed.

[0054] Furthermore, the control method further includes:

[0055] Determining whether the oxygen concentration in the greenhouse is lower than a preset threshold;

[0056] If yes, the second valve on the pipeline between the outlet end of the oxygen storage device and the third air outlet is controlled to open.

[0057] Furthermore, the control method further includes:

[0058] Determining whether the difference between the pressure in the greenhouse and the atmospheric pressure is within a preset range;

[0059] If yes, controlling the pressure balance valve on the pressure balance pipeline between the greenhouse and the atmosphere to remain closed;

[0060] If not, the pressure balance valve is controlled to open.

[0061] The present invention also provides a computer-readable storage medium on which a computer program is stored, and the program implements the above control method when executed by a processor.

[0062] The present invention also provides an electronic device, comprising:

[0063] one or more processors;

[0064] The storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned control method.

[0065] By applying the technical solution of the present invention, a gas isolation compartment is arranged at the top of a greenhouse, and the inner wall or outer wall of the gas isolation compartment is coated with a heat-insulating material; a first air outlet is arranged in the upper space of the greenhouse, connected to the gas isolation compartment, the first air outlet is opened during the daytime to allow high-temperature gas to enter the gas isolation compartment, closed during the transition period to allow the high-temperature gas to be enclosed in the gas isolation compartment, and opened again during the nighttime to allow the high-temperature gas to escape from the first air outlet and be released into the greenhouse, thereby increasing the temperature in the greenhouse, and realizing the recycling of heat energy. The recycled heat energy is used to heat the greenhouse at night to avoid energy waste. At the same time, since hot air accumulates in the upper space of the greenhouse, the temperature of the lower part of the greenhouse rises slowly, a second air outlet is arranged in the bottom space of the greenhouse, the second air outlet is connected to the first air outlet through a first air duct, an air circulation fan is arranged in the first air duct, and the wind of the first air outlet is guided to the second air outlet by the air circulation fan, so that the hot air is blown out from the bottom space of the greenhouse and flows upward, thereby ensuring that the temperature of the entire greenhouse rises evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 is a structural diagram of a heat preservation air conditioner according to an embodiment of the present invention;

[0067] Figure 2 A schematic diagram of a partial structure of a heat preservation air conditioner according to an embodiment of the present invention;

[0068] Figure 3 A schematic diagram of a partial structure of a heat preservation air conditioner according to an embodiment of the present invention;

[0069] Figure 4 is a flow chart of a control method according to an embodiment of the present invention;

[0070] Figure 5 A control principle diagram according to an embodiment of the present invention;

[0071] Figure 6 FIG. 4 is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0073] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0074] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0075] It should be understood that although the terms first, second, third, etc. may be used to describe the air outlets in the embodiments of the present invention, these air outlets should not be limited to these terms. These terms are only used to distinguish air outlets at different locations. For example, without departing from the scope of the embodiments of the present invention, the first air outlet may also be referred to as the second air outlet, and similarly, the second air outlet may also be referred to as the first air outlet.

[0076] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0077] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0078] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0079] Example 1

[0080] In current greenhouses, the temperature is lower at night, which requires an increased load on heat exchange equipment and increased energy consumption. However, the solar radiation heat is higher during the day, so the temperature inside the greenhouse will be higher, even higher than expected. This part of heat energy cannot be effectively collected and utilized, resulting in energy waste.

[0081] In view of the problem in the prior art that the temperature difference between day and night in a greenhouse is large, the solar radiation heat during the day cannot be effectively collected and utilized, resulting in energy waste, this embodiment provides a heat preservation air conditioner, which is applied to a greenhouse. Figure 1 is a structural diagram of a heat preservation air conditioner according to an embodiment of the present invention, such as Figure 1 As shown, the thermal insulation air conditioner comprises: a gas isolation chamber 1, which is arranged at the top of the greenhouse, and the inner wall or outer wall of the gas isolation chamber is coated with a thermal insulation material; a first air vent 2, which is arranged in the upper space in the greenhouse and connected to the gas isolation chamber 1, the first air vent is opened during the daytime to allow high-temperature gas to enter the gas isolation chamber, is closed during the transition period to allow the high-temperature gas to be enclosed in the gas isolation chamber, and is opened during the nighttime to allow the high-temperature gas to escape from the first air vent and be released into the greenhouse; wherein the daytime period can be calculated from sunrise; the transition period can be calculated from the moment when the temperature begins to drop in a day, until the temperature drops to a preset temperature, and then enters the nighttime period, and enters the daytime period of the next day when the sun rises again.

[0082] The second air outlet 3 is arranged in the bottom space of the greenhouse. Figure 2 FIG. 2 is a schematic diagram of a partial structure of a heat preservation air conditioner according to an embodiment of the present invention. Figure 2 As shown, the second air outlet 3 is connected to the first air outlet 2 through the first air duct 4, and an air circulation fan 5 is arranged in the first air duct 4.

[0083] In the heat preservation air conditioner of this embodiment, a gas isolation chamber 1 is arranged on the top of the greenhouse, and the inner wall or outer wall of the gas isolation chamber is covered with a heat preservation material; a first air outlet 2 is arranged in the upper space of the greenhouse, connected to the gas isolation chamber 1, the first air outlet 2 is opened during the daytime to allow high-temperature gas to enter the gas isolation chamber, closed during the transition period, so that the high-temperature gas is enclosed in the gas isolation chamber, and opened again during the nighttime to allow the high-temperature gas to escape from the first air outlet 2 and be released into the greenhouse, thereby increasing the temperature in the greenhouse, and realizing the recycling of heat energy. The recycled heat energy is used to heat the greenhouse at night to avoid energy waste. At the same time, since hot air will accumulate in the upper space of the greenhouse, the temperature of the lower part of the greenhouse rises slowly, and a second air outlet 3 is arranged in the bottom space of the greenhouse. The second air outlet 3 is connected to the first air outlet 2 through a first air duct 4, and an air circulation fan 5 is arranged in the first air duct 4. The air circulation fan 5 guides the wind from the first air outlet 2 to the second air outlet 3, so that the hot air is blown out from the bottom space of the greenhouse and flows upward, which can ensure that the temperature of the entire greenhouse rises evenly.

[0084] Carbon dioxide is the raw material for plant photosynthesis and is also a greenhouse gas that can maintain and increase the temperature in the greenhouse. Therefore, the concentration of carbon dioxide has an important influence on the temperature in the greenhouse and the growth of plants. In order to adjust the concentration of carbon dioxide in the greenhouse, as mentioned above, Figure 2As shown, the heat preservation air conditioner also includes: a carbon dioxide generating device 6, the outlet end of which is connected to the second air outlet 3, for generating carbon dioxide, and outputting it into the greenhouse through the second air outlet 3. By utilizing the high density of carbon dioxide gas, the temperature at the bottom of the greenhouse can be maintained, ensuring that the vegetation at the bottom maintains a constant temperature.

[0085] In order to control the flow direction and flow rate of the carbon dioxide gas, the above-mentioned heat preservation air conditioner further includes: a first control valve V1, which is arranged on the pipeline between the carbon dioxide generating device and the second air outlet.

[0086] Since there is a part of carbon dioxide and oxygen in the air, if the oxygen content in the greenhouse is too low, the plants will perform anaerobic respiration and consume plant nutrients. In order to avoid the above phenomenon, the oxygen concentration in the greenhouse needs to be maintained at a certain level. In order to make full use of the carbon dioxide and oxygen in the air, the above-mentioned thermal insulation air conditioner also includes: an air separation device 7, whose inlet end is connected to the air, and whose outlet end is respectively connected to the inlet end of the oxygen storage device 8, the inlet end of the carbon dioxide storage device 9 and the inlet end of the exhaust gas recovery device 10.

[0087] The outlet of the carbon dioxide storage device 9 is connected to the first air outlet 2 and the carbon dioxide generating device 6 respectively, and the carbon dioxide separated from the air and the carbon dioxide generated by the carbon dioxide generating device 6 are collected in the carbon dioxide generating device 6. The third air outlet 11 is arranged in the middle space in the greenhouse, and the outlet of the oxygen storage device 8 is connected to the third air outlet 11 for injecting oxygen into the greenhouse. A three-way valve is arranged between the outlet of the carbon dioxide storage device 9 and the inlet of the carbon dioxide generating device 6, and the third port of the three-way valve is connected to the first air outlet 2 for conveying carbon dioxide to the first air outlet 2.

[0088] In order to control the flow direction and flow rate of oxygen, the above-mentioned thermal insulation air conditioner also includes: a second control valve V2, which is arranged on the pipeline between the outlet end of the oxygen storage device 8 and the third air outlet 11.

[0089] The high-temperature gas collected during the day cannot meet the temperature requirements at night, and a heating system needs to be set up. Figure 3 FIG. 2 is a schematic diagram of a partial structure of a heat preservation air conditioner according to an embodiment of the present invention. Figure 3 As shown, the above-mentioned thermal insulation air conditioner also includes a compressor 12, which forms a circulation system with a condenser 13, an electronic expansion valve EXV and an evaporator 14. The condenser 13 is arranged in a second air duct 15, and the second air duct 15 is connected to a fourth air outlet 16, and the fourth air outlet 16 is arranged in the greenhouse.

[0090] Plants need a lot of water to grow, so a relatively high humidity needs to be maintained in the greenhouse. In order to adjust the humidity in the greenhouse, the heat preservation air conditioner also includes a humidifier (not shown in the figure), which is arranged inside the greenhouse.

[0091] In order to detect the carbon dioxide concentration, oxygen concentration and humidity respectively, the above-mentioned heat preservation air conditioner also includes: a carbon dioxide concentration sensor 17, which is arranged in the greenhouse; an oxygen concentration sensor 18, which is arranged in the greenhouse; a humidity sensor 19, which is arranged in the greenhouse, and a temperature sensor 20, which is arranged in the greenhouse. In specific implementation, in order to improve the detection accuracy, multiple sensors of each type can be set, and the average value of multiple detection values ​​is taken.

[0092] In order to ensure the normal operation of the greenhouse, the pressure in the greenhouse cannot be too high or too low. Figure 2 As shown, the above-mentioned heat preservation air conditioner also includes: a pressure sensor P, which is arranged in the greenhouse; a pressure balance pipeline 21, which is arranged between the greenhouse and the atmosphere; and a pressure balance valve V3, which is arranged on the pressure balance pipeline 21.

[0093] The warm air conditioner of this embodiment has a three-stage air outlet structure, such as Figure 1 As shown, a gas isolation chamber 1 is provided at the top of the greenhouse, so that the high-temperature gas generated during the day can be stored in the upper layer and isolated from the lower layer. During the night period, air is discharged through the first air outlet provided at the top and the second air outlet provided at the bottom to increase the temperature in the greenhouse. Carbon dioxide and oxygen are transported respectively through the second air outlet provided at the bottom and the third air outlet provided in the middle. By utilizing the high density of carbon dioxide gas, the temperature at the bottom of the greenhouse can be maintained, ensuring that the vegetation at the bottom layer maintains a constant temperature.

[0094] Example 2

[0095] This embodiment provides a control method, which is applied to the heat preservation air conditioner of the above embodiment. Figure 4 is a flow chart of a control method according to an embodiment of the present invention, as shown in Figure 4 As shown, the control method includes:

[0096] S101, determining the current time period; wherein the current time period includes the daytime period, the transition period and the nighttime period.

[0097] The daytime period can be calculated from sunrise; the transition period can be calculated from the moment the temperature starts to drop during the day, until the temperature drops to a preset temperature, entering the nighttime period, and when the sun rises again, entering the daytime period of the next day.

[0098] S102, controlling the opening and closing of the first air outlet according to the current time period, thereby controlling the gas flow direction in the gas isolation chamber.

[0099] The control method of this embodiment first determines the current time period, controls the opening and closing of the first air outlet according to the current time period, and then controls the gas flow direction in the gas isolation chamber. It is possible to collect high-temperature gas when the temperature is high and isolate and store it to avoid temperature loss. It is possible to release high-temperature gas when the temperature is low to increase the temperature of the greenhouse, thereby realizing energy recycling and utilizing, and heating the greenhouse at night through the recycled heat energy to avoid energy waste.

[0100] In order to achieve accurate control of the release time of high-temperature gas and avoid wasting energy, the opening and closing of the first air vent is controlled according to the current time period, thereby controlling the gas flow direction in the gas isolation chamber, including: if the current time period is the daytime period, the first air vent is controlled to be opened to allow the high-temperature gas to enter the gas isolation chamber; if the current time period is the transition period, the first air vent is controlled to be closed to allow the high-temperature gas to be enclosed in the gas isolation chamber; if the current time period is the nighttime period, the first air vent is controlled to be opened to allow the high-temperature gas to escape from the first air vent.

[0101] Since hot air will accumulate in the upper space of the greenhouse, the temperature of the lower part of the greenhouse rises more slowly. A second air outlet is set in the bottom space of the greenhouse. The second air outlet is connected to the first air outlet through a first air duct. An air circulation fan is set in the first air duct. The air of the first air outlet 2 is guided to the second air outlet by the air circulation fan, so that the hot air is blown out from the bottom space of the greenhouse and flows upward, which can ensure that the temperature of the entire greenhouse rises evenly. Therefore, if the current time period is night time, the first air outlet is controlled to open. After the high-temperature gas escapes from the first air outlet, the above-mentioned control method also includes: controlling the second air outlet to open, and at the same time controlling the air circulation fan in the first air duct to open.

[0102] In order to adjust the carbon dioxide concentration, humidity and temperature in the greenhouse respectively, the control method further includes: determining the target temperature in the greenhouse, and determining the target carbon dioxide concentration C0 and target humidity according to the actual temperature in the greenhouse; different carbon dioxide and water vapor ratios will produce different warming effects. When the carbon dioxide concentration increases, a greenhouse effect will be produced, which will improve the insulation or warming effect; when the humidity is low or it is completely dry air, it is only necessary to heat the air; but when the air humidity is high, in addition to heating the air, the water in the air must also be heated. Since the specific heat capacity of water is large, the higher the humidity, the higher the heating energy consumption will be. When the temperature is low, the temperature requirement is mainly considered. If the insulation or warming effect is to be improved, the carbon dioxide concentration ratio should be increased and the water vapor ratio should be reduced. When the temperature is high, the humidity requirement can be taken into account and the water vapor ratio can be appropriately increased. Therefore, the warming effect under different carbon dioxide concentrations and humidity can be tested in advance, and the carbon dioxide concentration and humidity at different temperatures when the optimal warming effect or the fastest warming speed is achieved can be recorded, and the corresponding relationship between temperature and carbon dioxide concentration and humidity can be obtained, which can be stored in the program. According to the above corresponding relationship, the target carbon dioxide concentration C0 and target humidity can be determined.

[0103] Figure 5 A control principle diagram according to an embodiment of the present invention is shown as follows: Figure 5 As shown, when the target carbon dioxide concentration C0 is greater than the actual carbon dioxide concentration, the first control valve on the pipeline between the carbon dioxide generator and the second air outlet is controlled to open, and then the speed of the carbon dioxide generator to prepare carbon dioxide is controlled by the Kalman filter algorithm according to the target carbon dioxide concentration C0 and the actual carbon dioxide concentration in the greenhouse. Specifically, according to the target carbon dioxide concentration C0 and the actual carbon dioxide concentration in the greenhouse, the speed of the carbon dioxide generator to prepare carbon dioxide is controlled by the Kalman filter algorithm, including: predicting the actual carbon dioxide concentration at the next moment based on the Kalman filter algorithm according to the actual carbon dioxide concentration at the current sampling moment and the previous sampling moment; and controlling the speed of the carbon dioxide generator to prepare carbon dioxide according to the target carbon dioxide concentration C0 and the predicted actual carbon dioxide concentration. The Kalman filter model of this embodiment is as follows:

[0104]

[0105] Among them, Cm(t) is the predicted carbon dioxide concentration at time t, Cm(t-1) is the predicted carbon dioxide concentration at time t-1, Cm(t) at the initial moment is given by the system, that is, the detection value of the carbon dioxide sensor, B(t) is the prediction error at time t, B(t-1) is the prediction error at time t-1, B(t-2) is the prediction error at time t-2, Kg(t) is the Kalman gain at time t, Kg(t-1) is the Kalman gain at time t-1, and M is the sensor error. Z(t) represents the measured value of the system at time t, H is the linear transformation function, and V(t) is the measurement noise at time t, which is assumed to be zero-mean Gaussian white noise. After that, the state value that best meets the current conditions can be recursively obtained by continuous calculation according to the above formula. As long as the prediction error and prediction value of carbon dioxide concentration at the initial moment are given, the model can continuously iterate and calculate the carbon dioxide concentration value at the next moment, and start the carbon dioxide generator through the control loop. At this time, the carbon dioxide generator can determine the speed of carbon dioxide production based on the difference between the Kalman filter prediction value and the set concentration. If the difference is large, the carbon dioxide generator produces carbon dioxide at the maximum speed, otherwise the speed of carbon dioxide production is the lowest. The indoor carbon dioxide sensor will monitor the indoor carbon dioxide concentration value at regular intervals. After the carbon dioxide generator starts to produce carbon dioxide for a period of time, the observation value of the carbon dioxide sensor at the current moment will be updated, and the difference between the predicted value and the set value will be recalculated to further determine the speed of carbon dioxide production.

[0106] Specifically, the speed of preparing carbon dioxide by the carbon dioxide generator is controlled according to the target carbon dioxide concentration C0 and the predicted actual carbon dioxide concentration, including: judging whether the predicted actual carbon dioxide concentration is greater than the target carbon dioxide concentration C0; if so, controlling the carbon dioxide generator to stop preparing carbon dioxide; if not, judging whether the ratio of the predicted actual carbon dioxide concentration to the target carbon dioxide concentration C0 is greater than or equal to a first preset threshold, wherein the first preset threshold is less than the target carbon dioxide concentration C0. In this embodiment, the first preset threshold can be set to 0.85; if yes, controlling the carbon dioxide generator to prepare carbon dioxide at a first preset speed; if not, controlling the carbon dioxide generator to prepare carbon dioxide at a second preset speed; wherein the second preset speed is greater than the first preset speed.

[0107] When the sensor monitors that the indoor carbon dioxide concentration is lower than the target carbon dioxide concentration, the system starts the carbon dioxide generating device. At this time, the carbon dioxide concentration sensor is used to detect the actual carbon dioxide concentration as the initial value of Kalman, and it is continuously iterated. A predicted carbon dioxide concentration is obtained each time. If the predicted carbon dioxide concentration does not meet the normal standard, then it depends on whether the predicted carbon dioxide concentration is greater than the target carbon dioxide concentration C0, or is between C0 and 0.85C0, or is less than 0.85C0. According to the comparison result of the predicted carbon dioxide concentration and the interval, the corresponding carbon dioxide generation mode is selected, and then the next iteration is entered until the predicted carbon dioxide concentration reaches the set standard.

[0108] When the predicted carbon dioxide concentration is greater than the preset value C0, the carbon dioxide generating device is turned off; when the predicted carbon dioxide concentration is between C0 and 0.85C0, the slow carbon dioxide production mode is entered; when the predicted carbon dioxide concentration is less than 0.85C0, the fast carbon dioxide production mode is entered.

[0109] After determining that the ratio of the predicted actual carbon dioxide concentration to the target carbon dioxide concentration C0 is greater than or equal to the first preset threshold, it indicates that the carbon dioxide concentration reaches the target value, and the first control valve on the pipeline between the carbon dioxide generator and the second air outlet is controlled to be closed.

[0110] like Figure 4 As shown, when the target humidity is greater than the actual humidity, the humidity adjustment amount is controlled by a proportional integral algorithm to control the gear position of the humidifier according to the target humidity and the actual humidity in the greenhouse.

[0111] As mentioned above, the heat preservation air conditioner of the present invention also includes a heating cycle system. The heating cycle system uses a compressor to pressurize the refrigerant, turning the refrigerant into a high-temperature and high-pressure gas, and then turns it back into a low-temperature and low-pressure liquid through heat exchange, and repeatedly performs heating. Since the higher the concentration of carbon dioxide, the better the heat preservation effect, and the higher the humidity, the slower the heating speed, the concentration and humidity of carbon dioxide will affect the temperature. Therefore, when heating through a compressor, the concentration and humidity of carbon dioxide need to be considered. Figure 4As shown in the figure, according to the actual carbon dioxide concentration, actual humidity, actual temperature in the greenhouse and target temperature, the frequency of the compressor is controlled by fuzzy control algorithm and proportional integral control algorithm. The heating capacity can be increased by controlling the frequency of the compressor. The carbon dioxide concentration C, humidity H, the difference between the actual temperature and the target temperature e, and the error rate △e / △t are used for fuzzy control, and the △Kp, △Ki, and △Kd parameters are provided to provide subsequent optimization parameters for the PID controller of the compressor. △e: the difference between the target temperature and the actual temperature, △t is the time interval between two measurements of the actual temperature, Kp is the proportional gain, Ki is the integral gain, Kd is the differential gain, △Kp is the change in the proportional gain, △Ki is the change in the integral gain, and △Kd is the change in the differential gain.

[0112] Fuzzy control algorithm is an intelligent control method based on fuzzy set theory, fuzzy language variables and fuzzy logic reasoning. It imitates human fuzzy reasoning and decision-making process, converts the experience of operators or experts into fuzzy rules, and then fuzzifies the real-time signal as the input of fuzzy rules, completes fuzzy reasoning, and applies the reasoning results to the actuator.

[0113] The basic process of fuzzy control algorithm includes the following steps: Fuzzification: Convert the precise input signal into fuzzy set, which involves defining the basic domain of input and output, and mapping these domains to the fuzzy subset domain. For example, the deviation in temperature control can be mapped to different levels of fuzzy subset domain, such as negative large (NB), negative small (NS), zero (O), positive small (PS) and positive large (PB). Establish fuzzy control rules: According to the experience of experts or the operation mode of operators, a series of fuzzy control rules are established. These rules are usually expressed in the form of "if-then" statements, for example: "If the temperature deviation is large, increase the compressor frequency." Obtain fuzzy relationship: Obtain fuzzy relationship by calculating the intersection and union of input variables and fuzzy rules. This process involves the use of membership function, which describes the degree to which an exact value belongs to a fuzzy set. Fuzzy decision: The output of the fuzzy controller is the synthesis of the error vector and the fuzzy relationship. This process involves converting the output of the fuzzy rule into a specific control quantity. Defuzzification of control quantity: Finally, the result of fuzzy decision is converted into an accurate control quantity, which is usually achieved by the centroid method or other methods.

[0114] If the oxygen content in the greenhouse is too low, the plants will perform anaerobic respiration and consume plant nutrients. In order to avoid the above phenomenon, the oxygen concentration in the greenhouse needs to be maintained at a certain level. Therefore, the above control method also includes: determining whether the oxygen concentration in the greenhouse is lower than a preset threshold; if so, controlling the second valve on the pipeline between the outlet end of the oxygen storage device and the third air outlet to open.

[0115] In order to ensure the normal operation of the greenhouse, the pressure in the greenhouse cannot be too high or too low. The control method also includes: judging whether the difference between the pressure in the greenhouse and the atmospheric pressure is within a preset range; if so, controlling the pressure balancing valve on the pressure balancing pipeline between the greenhouse and the atmosphere to remain closed; if not, controlling the pressure balancing valve to open.

[0116] Example 3

[0117] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the control method of the above embodiment is implemented.

[0118] Example 4

[0119] This embodiment provides an electronic device, including:

[0120] one or more processors;

[0121] The storage device is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors implement the control method of the above embodiment.

[0122] Figure 6 FIG. 1 is a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Figure 6 As shown, the electronic device includes:

[0123] One or more processors 610 and memory 620, Figure 6 A processor 610 is taken as an example.

[0124] The electronic device may further include: an input device 630 and an output device 640 .

[0125] The processor 610, the memory 620, the input device 630 and the output device 640 may be connected via a bus or other means. Figure 6 The example of connecting through bus is taken in the following.

[0126] The memory 620 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules corresponding to the control method in the embodiment of the present invention. The processor 610 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 620, that is, implementing the above method embodiment.

[0127] The memory 620 may include a program storage area and a data storage area, wherein the program storage area may store an application required for operating the device and at least one function; the data storage area may store data created according to the use of the control method, etc. In addition, the memory 620 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0128] The input device 630 can receive input digital or character information and generate key signal input related to user settings and function control of the electronic device. The output device 640 can include a display device such as a display screen.

[0129] The one or more modules are stored in the memory 620, and when executed by the one or more processors 610, perform the control method in any of the above method embodiments.

[0130] The electronic device product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0131] The electronic device of the embodiment of the present invention exists in various forms, including but not limited to:

[0132] (1) Mobile communication devices: These devices are characterized by having mobile communication functions and their main purpose is to provide voice and data communications. These terminals include: smart phones (such as iPhone), multimedia phones, functional phones, and low-end phones.

[0133] (2) Ultra-mobile personal computer devices: These devices fall into the category of personal computers, have computing and processing capabilities, and generally also have mobile Internet access features. These terminals include: PDA, MID and UMPC devices, such as iPad.

[0134] (3) Portable entertainment devices: These devices can display and play multimedia content. They include audio and video players (such as iPods), handheld game consoles, e-books, smart toys, and portable car navigation devices.

[0135] (4) Server: A device that provides computing services. The server consists of a processor, hard disk, memory, device bus, etc. The server is similar to a general computer architecture, but because it needs to provide highly reliable services, it has higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0136] (5) Other electronic devices with data interaction functions, such as televisions, large-screen cars, etc.

[0137] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0138] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat preservation air conditioner, applied to a greenhouse, characterized in that: The thermal insulation air conditioner comprises: A gas isolation chamber is arranged on the top of the greenhouse, and the inner wall or the outer wall of the gas isolation chamber is covered with a heat-insulating material; a first air vent, arranged in the upper space of the greenhouse and connected to the gas isolation chamber, the first air vent is opened during the daytime to allow the high-temperature gas to enter the gas isolation chamber, is closed during the transition period to allow the high-temperature gas to be confined in the gas isolation chamber, and is opened during the nighttime to allow the high-temperature gas to escape from the first air vent; The second air outlet is arranged in the bottom space of the greenhouse. The second air outlet is connected with the first air outlet through a first air duct. An air circulation fan is arranged in the first air duct.

2. The heat preservation air conditioner according to claim 1, characterized in that: The thermal insulation air conditioner also includes: A carbon dioxide generating device, whose outlet end is connected to the second air outlet, is used to generate carbon dioxide and output it into the greenhouse through the second air outlet.

3. The heat preservation air conditioner according to claim 2, characterized in that: The thermal insulation air conditioner also includes: A first control valve is arranged on the pipeline between the carbon dioxide generating device and the second air outlet.

4. The heat preservation air conditioner according to claim 2, characterized in that: The thermal insulation air conditioner also includes: An air separation device, whose inlet end is connected to air, and whose outlet ends are respectively connected to the inlet end of the oxygen storage device, the inlet end of the carbon dioxide storage device and the inlet end of the waste gas recovery device; The carbon dioxide storage device, the outlet end of which is respectively connected to the first air outlet and the carbon dioxide generating device; The third air outlet is arranged in the middle space of the greenhouse, and the outlet end of the oxygen storage device is connected to the third air outlet.

5. The heat preservation air conditioner according to claim 4, characterized in that: The thermal insulation air conditioner also includes: The second control valve is arranged on the pipeline between the outlet end of the oxygen storage device and the third air outlet.

6. The heat preservation air conditioner according to claim 1, characterized in that: The heat preservation air conditioner also includes a compressor, which forms a circulation system with a condenser, an electronic expansion valve and an evaporator. The condenser is arranged in a second air duct, the second air duct is connected to a fourth air outlet, and the fourth air outlet is arranged in the greenhouse.

7. The heat preservation air conditioner according to claim 1, characterized in that: The thermal insulation air conditioner also includes: A humidifier is arranged inside the greenhouse.

8. The heat preservation air conditioner according to claim 1, characterized in that: The thermal insulation air conditioner also includes: a carbon dioxide concentration sensor, disposed in the greenhouse; an oxygen concentration sensor, disposed in the greenhouse; A humidity sensor is arranged in the greenhouse.

9. The heat preservation air conditioner according to claim 1, characterized in that: The thermal insulation air conditioner also includes: a pressure sensor disposed in the greenhouse; a pressure balancing pipeline disposed between the greenhouse and the atmosphere; The pressure balancing valve is arranged on the pressure balancing pipeline.

10. A control method, applied to the heat preservation air conditioner according to any one of claims 1 to 9, characterized in that: The control method comprises: Determine the current time period; wherein the current time period includes a daytime period, a transition period, and a nighttime period; The opening and closing of the first air outlet is controlled according to the current time period, thereby controlling the gas flow direction of the gas isolation chamber.

11. The control method according to claim 10, characterized in that: Controlling the opening and closing of the first air outlet according to the current time period, thereby controlling the gas flow direction of the gas isolation chamber, includes: If the current time period is the daytime period, the first air outlet is controlled to be opened to allow the high-temperature gas to enter the gas isolation chamber; If the current time period is a transition period, controlling the first air outlet to be closed so that the high-temperature gas is enclosed in the gas isolation chamber; If the current time period is night time, the first air vent is controlled to be opened so that the high temperature gas escapes from the first air vent.

12. The control method according to claim 11, characterized in that: If the current time period is the night time period, the first air vent is controlled to be opened so that the high temperature gas escapes from the first air vent, and the method further includes: The second air outlet is controlled to open, and at the same time, the air circulation fan in the first air duct is controlled to open.

13. The control method according to claim 10, characterized in that: The method further comprises: determining a target temperature in the greenhouse, and determining a target carbon dioxide concentration and a target humidity based on the actual temperature in the greenhouse; When the target carbon dioxide concentration is greater than the actual carbon dioxide concentration, the first control valve on the pipeline between the carbon dioxide generator and the second air outlet is controlled to open, and then the speed of the carbon dioxide generator to prepare carbon dioxide is controlled by a Kalman filter algorithm according to the target carbon dioxide concentration and the actual carbon dioxide concentration in the greenhouse; When the target humidity is greater than the actual humidity, a proportional integral algorithm is used to control the humidity adjustment amount to control the gear position of the humidifier according to the target humidity and the actual humidity in the greenhouse; The frequency of the compressor is controlled by adopting a fuzzy control algorithm and a proportional-integral control algorithm according to the actual carbon dioxide concentration, the actual humidity, the actual temperature in the greenhouse and the target temperature.

14. The control method according to claim 13, characterized in that: According to the target carbon dioxide concentration and the actual carbon dioxide concentration in the greenhouse, a Kalman filter algorithm is used to control the speed of the carbon dioxide generating device to produce carbon dioxide, including: According to the actual carbon dioxide concentration at the current sampling moment and the previous sampling moment, the actual carbon dioxide concentration at the next moment is predicted based on the Kalman filter algorithm; The speed of preparing carbon dioxide by the carbon dioxide generating device is controlled according to the target carbon dioxide concentration and the predicted actual carbon dioxide concentration.

15. The control method according to claim 14, characterized in that: According to the target carbon dioxide concentration and the predicted actual carbon dioxide concentration, the speed of the carbon dioxide generating device to produce carbon dioxide is controlled, including: Determine whether the predicted actual carbon dioxide concentration is greater than the target carbon dioxide concentration; If yes, controlling the carbon dioxide generating device to stop producing carbon dioxide; If not, determine whether the ratio of the predicted actual carbon dioxide concentration to the target carbon dioxide concentration is greater than or equal to a first preset threshold value; if yes, control the carbon dioxide generator to prepare carbon dioxide at a first preset speed; if not, control the carbon dioxide generator to prepare carbon dioxide at a second preset speed; wherein the second preset speed is greater than the first preset speed.

16. The control method according to claim 15, characterized in that: After determining that the ratio of the predicted actual carbon dioxide concentration to the target carbon dioxide concentration is greater than or equal to a first preset threshold, the method further includes: The first control valve on the pipeline between the carbon dioxide generating device and the second air outlet is controlled to be closed.

17. The control method according to claim 10, characterized in that: The control method further comprises: Determining whether the oxygen concentration in the greenhouse is lower than a preset threshold; If yes, the second valve on the pipeline between the outlet end of the oxygen storage device and the third air outlet is controlled to open.

18. The control method according to claim 10, characterized in that: The control method further comprises: Determining whether the difference between the pressure in the greenhouse and the atmospheric pressure is within a preset range; If yes, controlling the pressure balancing valve on the pressure balancing pipeline between the greenhouse and the atmosphere to remain closed; If not, the pressure balance valve is controlled to open.

19. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 10 to 18 is implemented.

20. An electronic device, characterized in that: include: one or more processors; A storage device for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the method according to any one of claims 10 to 18.

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