PV / T coupled M-Cycle system applied to greenhouse humidity and heat regulation and control and humidity and heat regulation and control method

Abstract

The invention discloses a PV / T coupling M-Cycle system applied to greenhouse humidity and heat regulation and control and a humidity and heat regulation and control method, and belongs to the technical field of temperature and humidity regulation and control. The problem that a novel system capable of achieving efficient temperature and humidity adjustment at the same time is needed is solved. The device comprises a PV / T assembly used for solar energy and converting the solar energy into heat energy and electric energy, the PV / T assembly is connected with a water tank, and a first pump valve is arranged in the area between a first heat exchanger and the water tank; the M-Cycle module comprises a dehumidification mechanism, an evaporative cooling mechanism, a spraying humidification mechanism, an air inlet fan and a first air exhaust fan, wherein the air inlet fan and the first air exhaust fan are used for exhausting air into a greenhouse. And the spraying and humidifying mechanism is connected with the water tank. The PV / T system and the M-cycle system are coupled, the PV / T is used for power supply and heat supply, the M-cycle is used for temperature and humidity regulation and control, and meanwhile, the specific constant-temperature and constant-humidity environment of the greenhouse is precisely regulated and controlled.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of temperature and humidity regulation, and particularly relates to a PV / T coupled M-Cycle system applied to greenhouse humidity and heat regulation and a humidity and heat regulation method. BACKGROUND

[0002] Photovoltaic and heat generation technology (PV / T) is a highly efficient way of comprehensive utilization of solar energy. This technology converts light energy into electrical energy through solar panels to directly drive heat pumps or electric heating equipment to achieve indoor heating. At the same time, the electrical energy converted by the captured light energy can be stored in batteries and directly supplied to the target building and electrical system. In addition, the system can still maintain stable heating performance in extremely low temperature environments, and has good environmental adaptability.

[0003] PV / T technology integrates a light-heat collection module on the basis of traditional photovoltaic systems, which can effectively recover the waste heat generated during the operation of solar panels for domestic hot water or space heating, thereby significantly improving the comprehensive energy utilization efficiency of the system. This electric-thermal collaborative composite energy system provides a clean and sustainable solution for indoor thermal environment regulation.

[0004] However, the existing PV / T system, when applied to indoor heating, mainly focuses on improving air temperature, and has limited ability to regulate air humidity, making it difficult to meet the comprehensive regulation needs of temperature and humidity. Therefore, a new system that can simultaneously achieve efficient temperature and humidity regulation is needed to further improve the comprehensive performance of photovoltaic and light-heat systems in indoor environment control and greenhouse applications. SUMMARY

[0005] In view of the problem in the prior art that photovoltaic and light-heat integrated technology (PV / T) for indoor heating generally can only change the indoor temperature and cannot regulate the indoor humidity, the application provides a PV / T coupled M-Cycle system applied to greenhouse humidity and heat regulation and a humidity and heat regulation method.

[0006] The technical solution adopted by the application is as follows:

[0007] A PV / T coupled M-Cycle system applied to greenhouse humidity and heat regulation, comprising:

[0008] The PV / T module comprises a PV / T assembly for solar energy and converting solar energy into heat energy and electric energy, a water tank connected with the PV / T assembly, a heat exchange medium of the PV / T assembly entering the PV / T assembly from the water tank for heat exchange through a first low-temperature pipeline and then entering the water tank again through a first high-temperature pipeline, a first heat exchanger arranged between the PV / T assembly and the water tank, the first low-temperature pipeline being connected with a low-temperature channel of the first heat exchanger, the first high-temperature pipeline being connected with a high-temperature channel of the first heat exchanger, and a first pump valve being arranged on the first low-temperature pipeline at a region between the first heat exchanger and the water tank.

[0009] The M-cycle module comprises an air inlet pipeline and an air return pipeline communicated with the greenhouse, a dehumidification mechanism, an evaporative cooling mechanism, a spraying humidification mechanism and an air inlet fan for discharging air into the greenhouse are arranged on the air inlet pipeline in sequence, and the air inlet fan is arranged close to the greenhouse; and a first air outlet fan for discharging air in the greenhouse is arranged on the air return pipeline.

[0010] The spraying humidification mechanism is connected with the water tank.

[0011] After the technical scheme is adopted, the PV / T system and the M-cycle system are coupled, the PV / T provides power and heat, the M-cycle regulates temperature and humidity, and the specific constant temperature and humidity environment of the greenhouse is precisely regulated.

[0012] Preferably, the dehumidification mechanism is a regenerative rotary dehumidifier, the regenerative rotary dehumidifier comprises a rotary dehumidification zone and a rotary regeneration zone, a steam pipeline is arranged on the steam pipeline, the rotary regeneration zone is connected with the water tank through the steam pipeline, and a second air outlet fan is arranged on the air return pipeline.

[0013] After the technical scheme is adopted, the heat exchange medium in the water tank is used as a heat source, the temperature of the heat exchange medium can reach about 60 DEG C, the heat exchange medium is introduced into the rotary regeneration zone of the regenerative rotary dehumidifier, and the dehumidifier in the rotary regeneration zone is regenerated, so that energy consumption is saved.

[0014] Preferably, the steam generating mechanism comprises a second heat exchanger and an electric heater arranged in sequence, and the second heat exchanger is arranged close to the water tank.

[0015] After the technical scheme is adopted, in order to further improve the regeneration efficiency, the steam generating mechanism is further arranged, the heat exchange medium is heated through the second heat exchanger and the electric heater, the heat exchange medium can be changed into steam, so that the heat exchange medium can fully exchange heat with the dehumidifier, and the regeneration efficiency is improved.

[0016] Preferably, the spraying humidification mechanism comprises a water collecting chamber arranged below the spraying chamber, the water collecting chamber is connected with the spray head of the spraying chamber through a circulating pipeline, a second pump valve is arranged on the circulating pipeline, a liquid adding port and a liquid discharging port are further arranged on the water collecting chamber, the liquid adding port is connected with the water tank through a second high-temperature pipeline, a third pump valve is arranged on the second high-temperature pipeline, and the liquid discharging port is connected with the water tank through a second low-temperature pipeline.

[0017] After the technical scheme is adopted, the water collecting chamber is connected with the spray head of the spraying chamber through the circulating pipeline, the spraying water is recycled, the water collecting tank is connected with the water tank through the second high-temperature pipeline and the second low-temperature pipeline, the spraying humidification mechanism can be supplemented with spraying water through the water tank, the temperature of the spraying water can be adjusted to the required temperature, and the spraying water can reach the required temperature and humidity through heat exchange after contacting with air.

[0018] Preferably, the feedback system comprises a temperature and humidity sensor arranged on the return air pipeline, the temperature and humidity sensor is electrically connected with a controller, the evaporative cooling mechanism comprises a fourth pump valve, and the first pump valve, the second pump valve, the third pump valve and the fourth pump valve are electrically connected with the controller.

[0019] After the technical scheme is adopted, the humidity and temperature of the return air in the greenhouse are detected by the temperature and humidity sensor, and the first pump valve, the second pump valve, the third pump valve and the fourth pump valve are adjusted according to the detection result, so that the spraying water amount and the spraying water temperature in the spraying humidification mechanism are regulated.

[0020] Preferably, the air inlet pipeline and the return air pipeline are communicated.

[0021] After the technical scheme is adopted, the air inlet pipeline and the return air pipeline are communicated, the return air in the room can be mixed with the new incoming air, and the heat energy or cold energy of the return air in the room can be reused.

[0022] Preferably, a pre-cooler is further arranged on the air inlet pipeline, and the dehumidification mechanism is arranged between the pre-cooler and the evaporative cooling mechanism.

[0023] After the technical scheme is adopted, in order to further ensure the refrigeration effect in the greenhouse, the pre-cooler is further arranged in a more preferable case, the incoming air can be pre-cooled by the pre-cooler, and then further cooled by the evaporative cooling mechanism, so that the refrigeration effect is further ensured.

[0024] Preferably, the PV / T assembly is connected with a power supply mechanism, the power supply mechanism is used for supplying power to the greenhouse and the M-Cycle module, and the power supply mechanism comprises a storage battery and an inverter.

[0025] A greenhouse humidification and heat regulation method is performed by using a PV / T coupled M-Cycle system applied to greenhouse humidification and heat regulation, comprising:

[0026] The PV / T module continuously receives solar energy all day long, and converts the solar energy into electric energy and heat energy through the PV / T assembly, the heat exchange medium exchanges heat with the PV / T assembly and is heated, the heated heat exchange medium enters the water tank after heat exchange through the first heat exchanger, and the heat exchange medium in the water tank is discharged from the water tank, heat exchanged through the first heat exchanger, and then enters the PV / T assembly again for heat exchange; the electric energy generated by the PV / T assembly is used to power the M-Cycle module and the greenhouse;

[0027] When one or more of heating, cooling, humidifying and dehumidifying is required in the greenhouse, the M-Cycle module is started, specifically including:

[0028] According to the requirements of the greenhouse, it is determined whether to start the dehumidification mechanism, the evaporative cooling mechanism and the spray humidification mechanism, and under the action of the air inlet fan, the air passes through the dehumidification mechanism, the evaporative cooling mechanism and the spray humidification mechanism in turn, and in the dehumidification mechanism, the air is dehumidified to the required humidity by the dehumidification mechanism, in the evaporative cooling mechanism, the air is cooled to the required temperature by the evaporative cooling mechanism, and in the spray humidification mechanism, the air is sprayed, heated and humidified to the required temperature and humidity by the spray humidification mechanism, the spray medium of the spray humidification mechanism is the heat exchange medium from the water tank, the temperature of the heat exchange medium is set according to the required temperature in the greenhouse, and the heat exchange medium contacts with the air and exchanges heat, so as to achieve the required humidity and temperature.

[0029] After the technical scheme is adopted, the indoor temperature and humidity are regulated and controlled by the PV / T module and the M-Cycle module according to the technical scheme, the electric energy generated by the PV / T module can be used to power the M-Cycle module and the greenhouse, and the heat energy generated can be used to heat the greenhouse through the M-Cycle module, so that the effect of regulating and controlling the temperature and humidity of the greenhouse is improved.

[0030] As a preferred, it also includes conveying part of the indoor return air in the return air pipeline to the air inlet pipeline to mix with the air inlet, and then entering the greenhouse again after passing through the dehumidification mechanism, the evaporative cooling mechanism and the spray humidification mechanism;

[0031] It also includes monitoring the temperature and humidity of the return air, comparing the obtained temperature and humidity with the set value, and regulating and controlling the temperature of the heat exchange medium delivered to the spray humidification mechanism by the water tank and the amount of water sprayed according to the comparison result.

[0032] In summary, since the above technical scheme is adopted, the beneficial effects of the present application are:

[0033] (1) High comprehensive utilization rate of energy:

[0034] The heat-electricity collaborative output mode of the PV / T module can effectively reduce the dependence on external power grid and reduce the municipal power supply pressure; meanwhile, the M-Cycle module uses the ambient air as an auxiliary working medium, synchronously recovers a proper amount of indoor air, and has higher energy efficiency and energy recovery rate compared with a traditional rotary wheel cooling and dehumidifying system, so that the overall system energy efficiency is improved by about 30%, and the thermal perfection degree is higher.

[0035] (2) Temperature and humidity are cooperatively controlled:

[0036] The traditional PV / T module mainly realizes temperature regulation, and the improved M-Cycle module and the PV / T module are coupled in the application, so that the air enthalpy is reduced and the humidity is accurately controlled in the refrigeration and dehumidification mode, and the dynamic balance of the temperature and humidity is realized in the heating and humidification mode, and the optimal growth environment is provided for the greenhouse crops according to the characteristics of the greenhouse crops and the geographical and climatic environment.

[0037] (3) Strong environmental adaptability:

[0038] The system design considers the operation stability under extreme climate conditions, the PV / T assembly can continuously output energy under low temperature, high humidity and weak light conditions, the M-Cycle module can automatically switch the working mode to adapt to the temperature and humidity load demand in different seasons, and the stable operation of the system throughout the year is realized.

[0039] (4) Compact system structure and intelligent control:

[0040] The PV / T module, the M-cycle module and the greenhouse are integrated into an integrated system, and the layout is compact. Combined with the intelligent sensor and the regulation mechanism, the system can automatically adjust the operation mode according to the indoor and outdoor temperature and humidity, and realize the closed-loop control of the temperature and humidity.

[0041] (5) Wide application scenarios and significant ecological benefits:

[0042] The application can be widely applied to agricultural greenhouses, can effectively improve the greenhouse climate environment, promote crop growth and energy saving and emission reduction, and has good economic and social benefits. DETAILED DESCRIPTION

[0043] Figure 1 is a structural schematic view of the application;

[0044] Figure 2 is a temperature and humidity control logic diagram in the application;

[0045] Wherein, 1-PV / T module, 101-PV / T assembly, 102-first low-temperature pipeline, 103-first pump valve, 104-water tank, 105-first heat exchanger, 106-first high-temperature pipeline, 107-battery, 108-inverter, 2-M-Cycle module, 201-inlet air pipeline, 202-pre-cooler, 203-dehumidification mechanism, 204-evaporative cooling mechanism, 205-fourth pump valve, 206-spraying humidification mechanism, 207-second pump valve, 208-circulation pipeline, 209-inlet air fan, 210-return air pipeline, 211-first exhaust fan, 3-greenhouse, 4-second high-temperature pipeline, 5-second low-temperature pipeline, 6-steam pipeline, 7-second heat exchanger, 8-electric heater, 9-third pump valve, 10-second exhaust fan, 11-temperature and humidity sensor. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application and are not all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0047] In the description of the embodiments of the present application, it should be noted that the terms “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms “first”, “second”, “third”, and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0048] As shown in Figure 1 A PV / T coupled M-Cycle system applied to greenhouse humid heat regulation, comprising:

[0049] PV / T module 1, comprising a PV / T assembly 101 for solar energy and converting solar energy into heat energy and electric energy, a water tank 104 connected to the PV / T assembly 101, a heat exchange medium of the PV / T assembly 101 entering the PV / T assembly 101 from the water tank 104 for heat exchange through a first low-temperature pipeline 102, and then entering the water tank 104 again through a first high-temperature pipeline 106, the heat exchange medium being water in this embodiment, a first heat exchanger 105 provided between the PV / T assembly 101 and the water tank 104, the first heat exchanger 105 being a structure of the prior art, having a high-temperature passage and a low-temperature passage, heat transfer between the hot flow passage and the cold flow passage being achieved through a heat exchange medium (such as water, etc.), so as to achieve heat exchange, the first low-temperature pipeline 102 being connected to the low-temperature passage of the first heat exchanger 105, the first high-temperature pipeline 106 being connected to the high-temperature passage of the first heat exchanger 105, a first pump valve 103 being provided on the first low-temperature pipeline 102 at a region between the first heat exchanger 105 and the water tank 104; the first pump valve 103 can control the flow of water in the water tank 104 into the first heat exchanger 105, and then control the temperature of the backwater in the water tank 104 after being heated by the PV / T module, and the temperature of the backwater is controlled to further control the water temperature in the water tank 104; the basic water temperature of the water tank 104 is determined according to the heat energy generation effect of the PV / T assembly 101 and the heat exchange effect of water and the PV / T assembly 101, and the water temperature after heat exchange with the PV / T assembly 101 is about 60℃ in this embodiment;

[0050] M-Cycle module 2, comprising an air inlet pipeline 201 and an air return pipeline 210 communicating with the greenhouse 3, the air inlet pipeline 201 being sequentially provided with a dehumidification mechanism 203, an evaporative cooling mechanism 204, a spraying humidification mechanism 206, and an air inlet fan 209 for discharging air into the greenhouse, the air inlet fan 209 providing a power source for introducing outdoor fresh air into the M-Cycle module 2, and discharging the air into the greenhouse 3 after being treated by the M-Cycle module 2, the air inlet fan 209 being arranged close to the greenhouse 3, and in other embodiments, the installation position of the air inlet fan 209 can also be adaptively adjusted; the air return pipeline 210 being provided with a first exhaust fan 211 for discharging air in the greenhouse 3, the first exhaust fan 211 providing a power source for discharging indoor air to the outside through the air return pipeline 210, and the circulation of air in the greenhouse 3 being achieved through the air inlet pipeline 201 and the air return pipeline 210; the power of the air inlet fan 209 and the first exhaust fan 211 can be designed according to the size of the greenhouse 3 and other related parameters; the electric energy generated by the PV / T module 1 is used to power the mechanisms requiring electricity in the greenhouse 3 and the M-Cycle module 2;

[0051] The spraying humidifying mechanism 206 is connected with the water tank 104, and can deliver water in the water tank 104 to the spraying humidifying mechanism 206 as spraying water. Since the water in the water tank 104 has been subjected to heat exchange with the PV / T module 1, the water has a certain temperature. In this embodiment, the water in the water tank 104 is used as spraying water, and heat exchange can be realized by the contact between the spraying water and air, so that the air can be heated while being humidified. Compared with the air heating by using an additional electric heater, the heat in the water tank 104 can be directly used, and the electric energy generated by the PV / T module 1 can be more supplied to the greenhouse 3, so that the electricity demand of the greenhouse 3 can be better satisfied.

[0052] In one of the embodiments, the dehumidifying mechanism 203 is a regenerative rotary dehumidifier, the regenerative rotary dehumidifier includes a rotary dehumidifying area and a rotary regenerating area, the steam pipeline 6 is provided with a steam generating mechanism. In this embodiment, the dehumidifier is silica gel, and the regenerating temperature of the dehumidifier is 80-120℃. The rotary regenerating area is connected with the water tank 104 through the steam pipeline 6, and is further connected with an exhaust pipeline. The exhaust pipeline is provided with a second exhaust fan 10. The steam generating mechanism can convert the water delivered from the water tank 104 into steam, and the steam can enter the rotary regenerating area to regenerate the dehumidifier.

[0053] In one of the embodiments, the steam generating mechanism includes a second heat exchanger 7 and an electric heater 8 which are sequentially arranged on the steam pipeline 6. The second heat exchanger 7 is arranged close to the water tank 104. In this embodiment, the water in the water tank 104 is subjected to heat exchange with the second heat exchanger 7, and the water temperature is about 95℃. Then, the water is heated by the electric heater 8, and the water is converted into steam with a temperature of about 110℃. The steam enters the rotary regenerating area through the exhaust pipeline.

[0054] In one of the embodiments, the spraying humidifying mechanism 206 includes a water collecting chamber arranged below the spraying chamber. The water collecting chamber is connected with the nozzles of the spraying chamber through a circulating pipeline 208. The circulating pipeline 208 is provided with a second pump valve 207. The water collecting chamber is further provided with a liquid adding port and a liquid discharging port. The liquid adding port is connected with the water tank 104 through a second high-temperature pipeline 4. The second high-temperature pipeline 4 is provided with a third pump valve 9. The liquid discharging port is connected with the water tank 104 through a second low-temperature pipeline 5. The water of the spraying humidifying mechanism 206 is circulated. The water sprayed from the nozzles of the spraying humidifying mechanism 206 is subjected to heat and humidity exchange with air, and then flows into the water collecting chamber at the lower end by gravity. The water is pressurized by the second pump valve 207, and then sprayed from the nozzles at the upper part again.

[0055] In one of the embodiments, a feedback system is further included, which comprises a temperature and humidity sensor 11 arranged on the return air pipeline 210, the temperature and humidity sensor 11 is electrically connected with a controller, the evaporative cooling mechanism 204 comprises a fourth pump valve 205, and the first pump valve 103, the second pump valve 207, the third pump valve 9 and the fourth pump valve 205 are all electrically connected with the controller. In a more preferred embodiment, the water of the evaporative cooling mechanism 204 is recycled, and after being sprayed from the upper part of the evaporative cooler 204, the water enters the water collecting part at the bottom of the evaporative cooler 204 by gravity, and then the water in the water collecting part is pressurized by the fourth pump valve 205 and sprayed from the upper nozzle again.

[0056] In one of the embodiments, the air inlet pipeline 201 and the return air pipeline 210 are communicated. In this embodiment, the indoor return air and the new inlet air are mixed through the communication of the air inlet pipeline 201 and the return air pipeline 210, so as to realize the reuse of the heat energy or cold energy of the indoor return air.

[0057] In one of the embodiments, a pre-cooler 202 is further arranged on the air inlet pipeline 201, and the dehumidification mechanism 203 is arranged between the pre-cooler 202 and the evaporative cooling mechanism 204. In order to further ensure the refrigeration effect in the greenhouse, the pre-cooler 202 is further arranged in a more preferred case, the new inlet air is pre-cooled by the pre-cooler 202, and then further cooled by the evaporative cooling mechanism 204, so as to further ensure the refrigeration effect.

[0058] In one of the embodiments, the PV / T assembly 101 is connected with a power supply mechanism, the power supply mechanism is used for supplying power to the greenhouse 3 and the M-Cycle module 2, and the power supply mechanism comprises a storage battery 106 and an inverter 107.

[0059] A greenhouse humid and hot regulation method is performed by using the PV / T coupled M-Cycle system applied to the greenhouse humid and hot regulation, which comprises the following steps:

[0060] The PV / T module 1 continuously receives solar energy all day long, and converts the solar energy into electric energy and heat energy through the PV / T assembly 101, the heat exchange medium exchanges heat with the PV / T assembly 101 and is heated, the heated heat exchange medium enters the water tank 104 after heat exchange through the first heat exchanger 105, the heat exchange medium in the water tank 104 is discharged from the water tank 104, heat exchanged through the first heat exchanger 105, and then enters the PV / T assembly 101 for heat exchange again, and the water temperature in the water tank 104 is about 60℃; and the electric energy generated by the PV / T assembly 101 is used for supplying power to the M-Cycle module 2 and the greenhouse 3.

[0061] When one or more of the following requirements of heating, cooling, humidifying and dehumidifying in the greenhouse 3 is required, the M-Cycle module 2 is started, and specifically comprises the following steps:

[0062] When there is a need for cooling and dehumidification in summer, the dehumidification mechanism 203 and the evaporative cooling mechanism 204 are turned on, and the spray humidification mechanism 206 is turned off. Under the action of the air inlet fan 209, the air passes through the dehumidification mechanism 203, the evaporative cooling mechanism 204 and the spray humidification mechanism 206 in sequence. In the open state of the dehumidification mechanism 203, the air is dehumidified to the required humidity by the dehumidification mechanism 203. In the open state of the evaporative cooling mechanism 204, the air is cooled to the required temperature by the evaporative cooling mechanism 204. Then, the cooled air is discharged into the greenhouse 3 to cool and dehumidify the indoor environment. In a more preferred embodiment, a pre-cooler 202 is further provided. After the fresh air enters, it is pre-cooled in the pre-cooler 202, and then dehumidified in the dehumidification mechanism 203.

[0063] In another more preferred embodiment, the pre-cooler 202 is removed. When there is a need for cooling and dehumidification, the spray humidification mechanism 206 is still turned on. When dehumidifying, the air humidity is first reduced below the set value, and then the water sprayed by the spray humidification mechanism 206 is controlled to be cold water. The spray humidification mechanism 206 can be connected to an external low-temperature water source through a water supply pipeline. The low temperature of the low-temperature water can be caused by a refrigeration device, or it can be obtained by selecting a natural low-temperature water source. The water supply pipeline can not only supply water when there is a need for humidification by the humidification mechanism, but also supplement water for the spray humidification mechanism 206 at ordinary times. When the spray humidification mechanism 206 is connected to the water tank 104 through the second high-temperature pipeline 4 and the second low-temperature pipeline 5, the water tank 104 can also be supplied with water. Through heat exchange between the cold water and the air, the air is cooled, and a cooling effect similar to pre-cooling can be achieved.

[0064] When there is a need for heating and humidification in winter, the dehumidification mechanism 203 and the evaporative cooling mechanism 204 are turned off, and the spray humidification mechanism 206 is turned on. Under the action of the air inlet fan 209, the air passes through the dehumidification mechanism 203, the evaporative cooling mechanism 204 and the spray humidification mechanism 206 in sequence. When the air passes through the spray humidification mechanism 206, the hot water sprayed by the spray humidification mechanism 206 achieves the effect of regulating the humidity and temperature of the air. Then, the heated and humidified air is discharged into the greenhouse 3 to heat and humidify the indoor environment.

[0065] In one embodiment, part of the indoor return air in the return air pipeline 210 is transported into the air inlet pipeline 201 and mixed with the fresh air, and then enters the greenhouse again after passing through the dehumidification mechanism 203, the evaporative cooling mechanism 204 and the spray humidification mechanism 206. In this embodiment, the amount of fresh air can be calculated based on the fresh air exchange frequency of 0.5 times per hour. The indoor return air is mixed with the fresh air, thereby realizing the reuse of the heat or cold energy of the indoor return air.

[0066] As Figure 2As shown, the embodiment also includes monitoring the temperature and humidity of the return air, and comparing the obtained temperature and humidity with the set values, and regulating the temperature of the heat exchange medium delivered by the water tank 104 to the spray humidifying mechanism 206 and the amount of water sprayed according to the comparison results. Specifically in winter, when the temperature is higher than the set range, the first pump valve 103 is closed; when the temperature is lower than the set range, the first pump valve 103 is opened. When the humidity is higher than the set range, the second pump valve 207 of the spray humidifying mechanism 206 is closed to reduce the amount of water; when the humidity is lower than the set humidity range, the second pump valve 207 is opened, and the amount of water of the spray humidifying mechanism 206 is increased. In summer, the temperature can be adjusted by adjusting the ratio of the incoming air and the return air, and the humidity control is the same as in winter.

[0067] The above-described embodiments only express the specific implementation of the present application, which is described in detail, but should not be understood as a limitation on the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the technical concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A PV / T coupled M-Cycle system for greenhouse heat and humidity control, characterized in that: include: The PV / T module (1) includes a PV / T component (101) for solar energy and converting solar energy into thermal and electrical energy. The PV / T component (101) is connected to a water tank (104). The heat exchange medium of the PV / T component (101) enters the PV / T component (101) from the water tank (104) through a first low-temperature pipeline (102) for heat exchange, and then enters the water tank (104) again through a first high-temperature pipeline. A first heat exchanger (105) is provided between the PV / T component (101) and the water tank (104). The first low-temperature pipeline (102) is connected to the low-temperature channel of the first heat exchanger (105), and the first high-temperature pipeline is connected to the high-temperature channel of the first heat exchanger (105). A first pump valve (103) is provided on the first low-temperature pipeline (102) in the area between the first heat exchanger (105) and the water tank (104). The M-Cycle module (2) includes an air inlet duct (201) and a return air duct (210) connected to the greenhouse (3). The air inlet duct (201) is sequentially equipped with a dehumidification mechanism (203), an evaporative cooling mechanism (204), a spray humidification mechanism (206), and an air intake fan (209) for discharging air into the greenhouse. The air intake fan (209) is located close to the greenhouse. The return air duct (210) is equipped with a first exhaust fan (211) for discharging air from the greenhouse (3). The spray humidification mechanism (206) is connected to the water tank (104).

2. The PV / T coupled M-Cycle system for greenhouse heat and humidity control according to claim 1, characterized in that: The dehumidification mechanism (203) is a regenerating rotary dehumidifier. The regenerating rotary dehumidifier includes a rotary dehumidification zone and a rotary regeneration zone. The rotary regeneration zone is connected to the water tank (104) through a steam pipe (6). A steam generating mechanism is provided on the steam pipe (6). The rotary regeneration zone is also connected to an exhaust pipe. A second exhaust fan (10) is provided on the exhaust pipe.

3. The PV / T coupled M-Cycle system for greenhouse heat and humidity control according to claim 2, characterized in that: The steam generating mechanism includes a second heat exchanger (7) and an electric heater (8) arranged in sequence, with the second heat exchanger (7) located near the water tank (104).

4. The PV / T coupled M-Cycle system for greenhouse heat and humidity control according to claim 1, characterized in that: The spray humidification mechanism (206) includes a water collection chamber located below the spray chamber. The water collection chamber is connected to the spray nozzle of the spray chamber via a circulation pipe (208). A second pump valve (207) is provided on the circulation pipe (208). The water collection chamber is also provided with a liquid inlet and a liquid outlet. The liquid inlet is connected to the water tank (104) via a second high-temperature pipe (4). A third pump valve (9) is provided on the second high-temperature pipe (4). The liquid outlet is connected to the water tank (104) via a second low-temperature pipe (5).

5. A PV / T coupled M-Cycle system for greenhouse heat and humidity control according to claim 4, characterized in that: It also includes a feedback system, which includes a temperature and humidity sensor (11) installed on the return air duct (210), the temperature and humidity sensor (11) being electrically connected to a controller, and the evaporative cooling mechanism (204) including a fourth pump valve (205), the first pump valve (103), the second pump valve (207), the third pump valve (9) and the fourth pump valve (205) being electrically connected to the controller.

6. A PV / T coupled M-Cycle system for greenhouse heat and humidity control according to any one of claims 1-5, characterized in that: The air inlet duct (201) and the air return duct (210) are connected.

7. A PV / T coupled M-Cycle system for greenhouse heat and humidity control according to any one of claims 1-5, characterized in that: A precooler (202) is also provided on the air inlet duct (201), and the dehumidification mechanism (203) is located between the precooler (202) and the evaporative cooling mechanism (204).

8. A PV / T coupled M-Cycle system for greenhouse heat and humidity control according to any one of claims 1-5, characterized in that: The PV / T module (101) is connected to a power supply mechanism for supplying power to the greenhouse (3) and the M-Cycle module (2). The power supply mechanism includes a battery (106) and an inverter (107).

9. A method for controlling humidity and heat in a greenhouse, characterized in that: The process is carried out using the PV / T coupled M-Cycle system for greenhouse heat and humidity control as described in any one of claims 1-8, comprising: The PV / T module (1) operates around the clock and continuously receives solar energy. It converts solar energy into electrical and thermal energy through the PV / T component (101). The heat exchange medium exchanges heat with the PV / T component (101) and is heated. After being heated, the heat exchange medium enters the water tank (104) after heat exchange through the first heat exchanger (105). The heat exchange medium in the water tank (104) is discharged from the water tank (104), exchanges heat through the first heat exchanger (105), and then enters the PV / T component (101) again for heat exchange. The electrical energy generated by the PV / T component (101) powers the M-Cycle module (2) and the greenhouse (3). When there is a need for heating, cooling, humidification, or dehumidification in the greenhouse (3), the M-Cycle module (2) is activated, specifically including: Whether to turn on the dehumidification mechanism (203), the evaporative cooling mechanism (204) and the spray humidification mechanism (206) depends on the needs of the greenhouse (3). Under the action of the air intake fan (209), the air passes through the dehumidification mechanism (203), the evaporative cooling mechanism (204) and the spray humidification mechanism (206) in sequence. When the dehumidification mechanism (203) is turned on, the air is dehumidified to the required humidity by the dehumidification mechanism (203). When the evaporative cooling mechanism (204) is turned on, the air is cooled to the required temperature by the evaporative cooling mechanism (204). When the spray humidification mechanism (206) is turned on, the air passes through the spray humidification mechanism (206) and is sprayed, heated and humidified to the required temperature and humidity. The spray medium of the spray humidification mechanism (206) is a heat exchange medium from the water tank (104). The temperature of the heat exchange medium is set according to the required temperature in the greenhouse (3). The heat exchange medium comes into contact with the air and exchanges heat, thereby achieving the required humidity and temperature.

10. A greenhouse humidity and heat control method according to claim 9, characterized in that: It also includes transporting the indoor return air inside the return air duct (210) to the air inlet duct (201) and mixing it with the air inlet. After passing through the dehumidification mechanism (203), the evaporative cooling mechanism (204), and the spray humidification mechanism (206), it re-enters the greenhouse. It also includes monitoring the temperature and humidity of the return air, comparing the obtained temperature and humidity with the set values, and adjusting the temperature of the heat exchange medium delivered by the water tank (104) to the spray humidification unit (206) and the amount of water sprayed based on the comparison results.

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