A cold and heat source device and a control method for a semi-closed greenhouse temperature control system

Abstract

The application discloses a cold and heat source device and a control method for a semi-closed greenhouse temperature control system, which comprises a heat recovery water chiller unit, a cooling tower connected with the heat recovery water chiller unit through a pipeline, a cold source side comprising a cold source side heat exchange unit, a cold storage tank and a cold end, the cold storage tank being connected in parallel with the connecting pipeline of the heat recovery water chiller unit and the cold source side heat exchange unit through a pipeline, the cold end being connected with the cold source side heat exchange unit through a pipeline, a heat source side comprising a heat source side heat exchange unit, a heat storage tank and a heat end, the heat storage tank being connected in parallel with the connecting pipeline of the heat recovery water chiller unit and the heat source side heat exchange unit through a pipeline, the heat end being connected with the heat source side heat exchange unit through a pipeline, and control valves being arranged on the connecting pipelines of the cold source side and the heat source side. The application can have both cooling and heating functions, improve environmental adaptability and control flexibility, realize cold and heat recycling, greatly reduce energy waste and improve energy utilization efficiency.

Description

Technical Field

[0001] This application relates to the field of greenhouse temperature control technology, and more specifically, to a cold and heat source device and control method for a temperature control system in a semi-enclosed greenhouse. Background Technology

[0002] Semi-enclosed greenhouses, representing facility agriculture, have enormous market potential in my country and are undoubtedly a good option for the country facing "agricultural labor shortages and agricultural modernization transformation." However, current heating and cooling source devices for temperature control systems in semi-enclosed greenhouses are not sophisticated enough. Generally, they rely solely on refrigeration units for cooling or a single heat source for heating. This means that current heating and cooling systems can only achieve single-function heating or cooling; the heat generated by the refrigeration unit during cooling and the cooling capacity generated by the heating unit during heating cannot be effectively utilized or stored, resulting in significant waste. Furthermore, single-function heating or cooling modes are poorly adapted to environmental changes and cannot provide on-demand control, resulting in insufficient precision in regulating greenhouse temperature and humidity. Summary of the Invention

[0003] The main objective of this application is to provide a heat source device for a temperature control system in a semi-enclosed greenhouse, in order to solve the problems of heat source devices in related technologies that can only achieve single heating or cooling, have insufficient energy utilization, and poor temperature regulation flexibility.

[0004] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application.

[0005] According to a first aspect of this application, a cold and heat source device for a temperature control system in a semi-enclosed greenhouse is provided, comprising: At least one heat recovery chiller unit; The cooling tower is connected to the heat recovery chiller unit via a pipeline; The cold source side includes a cold source side heat exchanger unit and a cold storage tank. The cold storage tank is connected in parallel to the connecting pipe between the heat recovery chiller unit and the cold source side heat exchanger unit through a pipeline. The cold source side heat exchanger unit is used to connect to the cooling end through a pipeline. The heat source side includes a heat source side heat exchanger unit and a heat storage tank. The heat storage tank is connected in parallel to the heat recovery chiller unit and the heat source side heat exchanger unit via a pipeline. The heat source side heat exchanger unit is used to connect to the heat-consuming end via a pipeline. Control valves are respectively installed on the connecting pipes of the cold source side and the heat source side.

[0006] Through the above setup, on the one hand, it is possible to realize the recovery and reuse of heat and cold, significantly reducing energy waste and improving energy utilization efficiency: This device is equipped with a heat recovery chiller unit, which breaks through the limitations of single cooling or single heating in the existing technology. It can effectively recover the waste heat generated by the heat recovery chiller unit during cooling and the cold energy generated by the heat recovery chiller unit during heating, avoiding the waste caused by the direct discharge of such redundant energy in traditional devices; at the same time, the cold storage tank on the cold source side and the heat storage tank on the heat source side can store the recovered cold and heat respectively, realizing energy buffering and scheduling, allowing redundant energy to be reused, significantly improving the energy utilization rate of the entire temperature control system, and reducing the operating energy consumption and cost of the greenhouse; On the other hand, it can have both cooling and heating functions, improving environmental adaptability and control flexibility: through the coordinated cooperation of heat recovery chiller unit with cold source side and heat source side, the device can flexibly switch between cooling or heating mode according to the actual temperature control needs of semi-enclosed greenhouse, without the need to set up separate refrigeration unit and heating unit, which simplifies the device structure and effectively solves the problem of poor ability of existing single mode to cope with environmental changes. It can adapt to temperature fluctuations in different seasons and at different times, and meet the temperature control needs of greenhouse around the clock. On the other hand, it can achieve precise temperature and humidity control, ensuring the stability of the greenhouse planting environment: heat exchange units are set up on the cold source side and the heat source side respectively, and the cold storage tank and the heat storage tank are connected in parallel to the corresponding connecting pipes. With the help of control valves set on the pipes on both sides, the amount and speed of cold and heat transmission can be precisely adjusted, realizing precise control of the output energy of the cold end and the heat end; at the same time, through the buffering effect of the energy storage tank, it can avoid the sudden rise and fall of temperature during the temperature control process, further improving the stability and accuracy of temperature control, and thus optimizing the temperature and humidity environment in the greenhouse.

[0007] In one exemplary embodiment of this application, the heat source side further includes a municipal heating heat exchanger unit and a heat source side manifold. The heat recovery chiller unit, the heat source side heat exchanger unit, and the municipal heating heat exchanger unit are respectively connected to the heat source side manifold through pipelines and form a circulation loop. The heat storage tank is connected in parallel between the heat source side manifold and the heat recovery chiller unit through pipelines.

[0008] Through the above setup, on the one hand, by using the heat exchange unit for municipal heating, the existing municipal heating system in the city can be fully utilized as an auxiliary heat source, eliminating the need to build an additional large-scale independent heating unit. This reduces the procurement, installation, and commissioning costs of the core heating equipment on the heat source side, significantly lowering the overall construction investment on the heat source side. At the same time, it avoids the additional costs of independent heating units occupying space and requiring separate supporting energy consumption facilities.

[0009] On the other hand, the installation of the heat source-side manifold enables the orderly connection and cyclical linkage of the heat recovery chiller unit, the heat source-side heat exchanger unit, and the municipal heating heat exchanger unit. It can flexibly allocate the heating ratio of the municipal heating and the heat recovery chiller unit according to the heating demand of the greenhouse, ensuring that the municipal heating resources are fully utilized, reducing dependence on its own heating equipment, and reducing equipment operating losses. At the same time, the heat storage tank is connected in parallel between the heat source-side manifold and the heat recovery chiller unit, which can store the surplus heat of the municipal heating and the waste heat generated by the heat recovery chiller unit, avoiding the waste of municipal heating resources, and reducing the start-up frequency of its own heating equipment. This reduces the investment in the equipment construction phase and the energy consumption cost in the later operation, achieving dual savings in construction and operating costs.

[0010] On the other hand, by integrating the heat exchange units for municipal heating with the existing heat source side structure, there is no need for large-scale modifications to the original heat source side heat exchange units, heat storage tanks and other components. Only a small number of new heat exchange and water distribution components need to be added and the pipeline connection needs to be optimized, which simplifies the overall structure of the heat source side system. The simplification of the structure not only reduces the cost of pipeline laying and equipment integration during the construction phase, but also reduces the workload and maintenance cost of equipment maintenance in the later stage, and reduces the long-term operating burden of the greenhouse temperature control system.

[0011] In one exemplary embodiment of this application, the heat source side further includes a boiler, which is connected to the heat source side manifold via a pipe and forms a circulation loop.

[0012] With the above setup, on the one hand, the boiler can be used as an auxiliary heat source to enter the circulation loop, which can actively undertake part of the heating load and divert the heating pressure of the heat recovery chiller unit. The heat recovery chiller unit does not need to have the heating capacity to meet all the peak heating demand of the greenhouse. Core equipment with smaller heating power and more economical specifications can be selected, which greatly reduces the performance requirements of the core heating equipment and controls the equipment investment cost from the source.

[0013] On the other hand, the heat source-side manifold enables the orderly linkage between the heat recovery chiller, the heat source-side heat exchanger, the municipal heating heat exchanger, and the boiler. It can flexibly adjust the heating ratio of the boiler, the municipal heating heat exchanger, and the heat recovery chiller according to the real-time heating demand of the greenhouse (such as the difference in heating demand between day and night, and between sunny and cloudy days), avoiding the core equipment from operating at full load for a long time. At the same time, the heat storage tank can store the excess heat generated by the boiler and the waste heat of the heat recovery chiller, and release heat during peak heating periods to make up for the insufficient heating capacity of a single device. It eliminates the need for the core heating equipment to reserve excessive heating redundancy to cope with extreme heating scenarios, further reducing the heating capacity requirements of the core equipment, while extending the service life of the equipment and reducing later maintenance costs. In one exemplary embodiment of this application, the cold source side further includes a cold source side primary manifold, which is connected between the heat recovery chiller and the cold source side heat exchanger via a pipeline, and the cold storage tank is connected in parallel between the cold source side primary manifold and the heat recovery chiller via a pipeline.

[0014] In one exemplary embodiment of this application, the cold source side further includes a cold source side secondary heat exchanger unit and a cold source side secondary water manifold. The cold source side secondary heat exchanger unit, the cold source side secondary water manifold, and the cold source side heat exchanger unit are connected in sequence to form a circulation loop. The cold-using end is connected to the cold source side secondary heat exchanger unit through a pipeline.

[0015] With the above setup, a secondary heat exchanger and a secondary manifold are added to the existing cold source side heat exchanger unit. The three are connected in sequence to form a circulation loop, and the cold end is connected to the secondary heat exchanger unit on the cold source side. The core technical effect is to realize secondary circulation heat exchange of cold energy, further tap the potential of cold energy utilization, and optimize the cooling effect on the cold source side. Specifically, the cooling capacity output from the heat exchanger unit on the cold source side is first transported to the secondary manifold on the cold source side. The manifold performs initial distribution and buffering of the cooling capacity, and then it is transported to the secondary heat exchanger unit on the cold source side for secondary heat exchange and precise temperature regulation. Finally, it is supplied to each cooling end, forming a dual circulation mode of "primary heat exchange for cooling + manifold buffering + secondary heat exchange for temperature regulation". This avoids the cooling capacity loss and uneven cooling caused by direct cooling capacity transport. At the same time, the secondary circulation heat exchange can reuse the cooling capacity output from the heat exchanger unit on the cold source side, fully recover the surplus cooling capacity that is not fully utilized, reduce cooling capacity waste, and eliminate the need for the heat exchanger unit on the cold source side to have excessively high cooling capacity. This indirectly reduces the performance requirements of the core equipment on the cold source side, echoing the energy-saving and cost-reduction logic of the boiler auxiliary heating on the heat source side, and further optimizing the energy utilization efficiency of the entire temperature control system.

[0016] In one exemplary embodiment of this application, the heat recovery chiller and the cooling tower are configured as two or more sets, and the two or more sets of the heat recovery chiller and the cooling tower are connected in parallel between the cold source side and the heat source side.

[0017] With the above setup, multiple heat recovery chiller units and cooling towers are connected in parallel. This allows for flexible start-up and shutdown of the corresponding number of units and cooling towers based on real-time cooling demand from the cold source and heating demand from the heat source, without requiring all units to operate at full load continuously. When the cooling and heating demand of the greenhouse is low, only some units can be started, avoiding long-term high-load operation of any single unit, reducing equipment wear and extending equipment lifespan. During peak energy consumption periods, all units can be started to provide coordinated energy supply, ensuring sufficient cooling and heating to meet peak energy demands.

[0018] On the other hand, multiple sets of equipment are connected in parallel to form redundancy backup. When one set of heat recovery chiller or cooling tower fails or is under maintenance, the remaining units can start and run normally, avoiding the shutdown of the entire cold and heat source device due to the failure of a single set of equipment. This ensures the continuous and stable operation of functions such as secondary circulation heat exchange on the cold source side and heating on the heat source side, ensuring that the temperature control needs of the semi-enclosed greenhouse are not affected and improving the reliability of the entire temperature control system.

[0019] On the other hand, the parallel setup of multiple units can flexibly adjust the number of units according to the actual size and energy demand of the greenhouse, eliminating the need for separate design and customization of equipment for greenhouses of different sizes, reducing equipment adaptation costs, improving the versatility and applicability of this cold and heat source device, and enhancing the practicality and promotional value of the solution.

[0020] In one exemplary embodiment of this application, the control valve includes electric valve V1, electric valve V2, and electric valve V3; The electric valve V1 is installed on the pipeline connecting the heat recovery chiller unit and the primary water distributor on the cold source side; The electric valves V2 and V3 are installed on the pipeline connecting the heat recovery chiller unit and the cold storage tank.

[0021] In one exemplary embodiment of this application, the control valve includes electric valve V4, electric valve V5, and electric valve V6; The electric valves V4 and V6 are installed on the pipeline connecting the heat recovery chiller unit and the heat storage tank. The electric valve V5 is installed on the pipeline connecting the heat recovery chiller unit and the heat source side manifold.

[0022] In one exemplary embodiment of this application, the control valve further includes an electric valve V7 and an electric valve V8, wherein the electric valve V7 is installed on the pipeline connecting the heat source-side manifold and the boiler; The electric valve V8 is installed on the pipeline connecting the boiler and the municipal heating heat exchange unit.

[0023] According to a second aspect of this application, a cold and heat source device for a temperature control system of a semi-enclosed greenhouse is provided, including a heat recovery chiller unit, a cooling tower, a cold source side, a heat source side, pipes connecting the various parts, and electric valves V1-V8, wherein electric valves V1-V3 are used for controlling the cold source side, and electric valves V4-V8 are used for controlling the heat source side. The cold source side includes a cold storage tank, a cold source side primary water manifold, a cold source side heat exchange unit, and a cold end. The cold source side primary water manifold consists of a cold source side water distributor and a cold source side water collector. The heat source side includes a heat storage tank, a heat source side manifold, a heat source side heat exchange unit, a boiler, a municipal heating heat exchange unit, and a heat-consuming end. The heat source side manifold consists of a heat source side distributor and a heat source side collector.

[0024] According to a third aspect of this application, a control method for a temperature control system in a semi-enclosed greenhouse is provided. Using the aforementioned cold and heat source device, the method regulates the water circulation path and flow rate within each pipe through control valves to achieve the following control mode: First refrigeration and cold storage mode: The water source circulates between the refrigeration end of the heat recovery chiller, the cold storage tank and the cooling tower. After the heat recovery chiller cools the water, it stores the chilled water in the cold storage tank. Cooling mode: The water source circulates between the cold storage tank and the heat exchange unit on the cold source side. The chilled water flowing out of the cold storage tank exchanges heat with the hot water at the cold end in the heat exchange unit on the cold source side. Cooling mode: The water source circulates between the cooling end of the heat recovery chiller, the heat exchanger on the cold source side, and the cooling tower, and exchanges heat with the hot water at the cold end in the heat exchanger on the cold source side. The second refrigeration and cold storage mode: the water source circulates between the cooling end of the heat recovery chiller, the cold storage tank, the cold source side heat exchanger and the cooling tower, and regulates the water circulation between the heat recovery chiller and the cold storage tank and the cold source side heat exchanger. The chilled water and the cold end hot water exchange heat in the cold source side heat exchanger. Cooling and cooling mode: The water source circulates between the cooling end of the heat recovery chiller, the heat exchanger on the cold source side, and the cooling tower. At the same time, the chilled water in the cold storage tank is transported to the heat exchanger on the cold source side to exchange heat with the hot water at the cooling end. Cooling and heat storage mode: One water source circulates between the cooling end of the heat recovery chiller and the cold storage tank for cooling and cold storage, while the other water source circulates between the cooling heat release end of the heat recovery chiller and the heat storage tank to recover the cooling heat and store it in the heat storage tank. First heating and heat storage mode: The water source circulates between the heating end of the heat recovery chiller, the heat storage tank and the cooling tower. After the heat recovery chiller heats the water, it stores the hot water in the heat storage tank. Heat release mode: The water source circulates between the heat storage tank and the heat exchange unit on the heat source side. The hot water flowing out of the heat storage tank exchanges heat with the cold water at the heat consumption end in the heat exchange unit on the heat source side. Heating mode: The water source circulates between the heating end of the heat recovery chiller, the heat exchanger on the heat source side, and the cooling tower, and exchanges heat with the chilled water at the heat end in the heat exchanger on the heat source side. The second heating and heat storage mode: the water source circulates between the heating end of the heat recovery chiller, the heat storage tank, the heat exchanger on the heat source side and the cooling tower. The water circulation volume between the heat recovery chiller and the heat storage tank and the heat exchanger on the heat source side is regulated. Hot water and cold water at the heat-consuming end exchange heat in the heat exchanger on the heat source side. Heating and heat release mode: The water source circulates between the heating end of the heat recovery chiller, the heat exchanger on the heat source side and the cooling tower. At the same time, the hot water in the heat storage tank is transported to the heat exchanger on the heat source side to exchange heat with the cold water at the heat-consuming end. Heating and cooling storage mode: One water source circulates between the heating end of the heat recovery chiller and the heat storage tank for heating and heat storage, while the other water source circulates between the heating and cooling end of the heat recovery chiller and the cooling storage tank to recover and store the cooling capacity in the cooling storage tank.

[0025] The control method of the third aspect of this application uses the aforementioned cold and heat source device, regulates the water circulation path and circulation volume in the pipeline through a control valve, and relies on the synergistic effect of multiple control modes to achieve precise, efficient, and energy-saving operation of the temperature control system. The specific technical effects are as follows: 1. Achieve precise control and flexible supply of cooling and heating capacity to meet diverse temperature control needs of greenhouses. Through basic modes such as refrigeration, heating, cooling release, and heat release, it can directly meet the conventional cooling and heating needs of greenhouses; combined with cold and heat storage modes, it can store excess cooling and heating capacity, avoiding energy waste; multiple composite modes can be flexibly switched according to real-time needs, achieving precise matching between energy supply and demand, and ensuring stable temperature inside the greenhouse.

[0026] 2. Improve energy efficiency and achieve heat recovery and reuse. Cooling and heat storage modes can efficiently recover excess cooling or heating generated during the operation of heat recovery chillers, storing it in cold storage tanks and heat storage tanks respectively for secondary use, minimizing energy loss and reducing system operating costs.

[0027] 3. Optimize system operation flexibility and reliability to adapt to different working conditions. Multiple control modes can be flexibly switched according to changes in the external environment and differences in peak energy consumption in the greenhouse. It can operate efficiently under normal working conditions and can also cope with extreme energy demand through a composite mode. At the same time, relying on the energy storage tank for buffering, it avoids energy supply fluctuations and ensures the stable operation of the temperature control system.

[0028] In one exemplary embodiment of this application, the first refrigeration cold storage mode, refrigeration mode, second refrigeration cold storage mode, refrigeration cold release mode, refrigeration heat storage mode, first heating heat storage mode, heating mode, second heating heat storage mode, heating heat release mode, and heating cold storage mode are configured to be executed during off-peak electricity periods. The cold release mode and heat release mode are configured to be executed during peak electricity periods.

[0029] The above settings achieve a precise match between electricity consumption periods and electricity price periods: During off-peak hours, electricity prices are lower, and the system can operate in various modes such as energy storage and direct cooling / heating during these periods. It stores electrical energy as cooling / heating or directly applies it to load demand, significantly reducing electricity consumption during peak hours when prices are high, thereby significantly reducing overall electricity costs for users and improving the economic efficiency of system operation.

[0030] The system's main energy-consuming components operate during off-peak hours, effectively reducing grid load pressure during peak hours, avoiding concentrated high-power consumption during peak periods, achieving stable grid load regulation, alleviating operational pressure caused by peak-to-valley differences, and improving grid stability and efficiency. Furthermore, it offers multiple subdivided operating modes tailored to different cooling and heating needs, uniformly adaptable to off-peak hours. The system can flexibly switch between modes based on actual load and energy storage status, ensuring efficient system operation during off-peak hours, maximizing the use of off-peak energy for energy storage and load supply, and improving overall energy utilization and system adaptability.

[0031] Furthermore, during peak hours, only the cold / heat stored during off-peak hours is used for cooling and heating, without the need for high-power consumption for immediate cooling / heating, which significantly reduces electricity consumption during peak hours. This operational strategy achieves energy-saving operation by storing and using energy when electricity prices are low and using energy only when electricity prices are high.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the structure of a cold and heat source device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a cold and heat source device according to another embodiment of this application; Figure 3 This is a schematic diagram of the structure on the heat source side according to another embodiment of this application; Figure 4 This is a structural schematic diagram of the cold source side according to another embodiment of this application; Among them, 1. Heat recovery chiller unit; 2. Cooling tower; 3. Cold source side; 301. Cold storage tank; 302. Primary water distribution manifold on the cold source side; 303. Heat exchanger unit on the cold source side; 304. Secondary water distribution manifold on the cold source side; 305. Secondary heat exchanger unit on the cold source side; 306. Cold end; 4. Heat source side; 401. Heat storage tank; 402. Water distribution manifold on the heat source side; 403. Heat exchanger unit on the heat source side; 404. Boiler; 405. Heat exchanger unit for municipal heating; 406. Heat end; 5. Control valve. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted. Furthermore, the drawings are merely illustrative of this application and are not necessarily drawn to scale.

[0035] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples in the accompanying drawings. It is understood that if the device of the icon is flipped so that it is upside down, the component described as "upper" will become the component described as "lower." When a structure is "upper" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0036] The terms “a,” “one,” “the,” and “at least one” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first” and “second” are used only as markers and are not a limitation on the number of objects.

[0037] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] In addition, the term "multiple" should mean two or more.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Semi-enclosed greenhouses are fully enclosed external structures. Internally, they are equipped with a light-enhancing system, a wet curtain + misting humidity control system, a mechanical ventilation and airflow equalization system, and an air handling coil temperature and humidity control system. Externally, they feature a shading system and a ventilation and purification system, representing an advanced form of greenhouse in modern agriculture. They are primarily used for high-value flowers such as roses, lilies, anthuriums, orchids, and tulips, as well as high-value fruits and vegetables such as cherry tomatoes, bell peppers, cucumbers, strawberries, blueberries, and raspberries. These greenhouses are extremely sensitive to temperature, humidity, light, cleanliness, virus protection, and diurnal temperature variations. The heating and cooling systems constructed for them must meet the time, quantity, and parameter requirements for continuous use. Annual cooling and heating energy consumption accounts for more than 50% of the total energy consumption of a semi-enclosed greenhouse.

[0041] Based on the above characteristics, modern semi-enclosed greenhouses, which produce low-efficiency outputs, place extremely high demands on the capacity and energy efficiency of their cold and heat source devices. This requires that the cold and heat source devices fully utilize the by-product cold source while generating the heat source, fully utilize the by-product heat source while generating the cold source, and fully store and reuse the by-product energy to improve the overall energy efficiency of cold and heat energy.

[0042] Based on this, in one embodiment, such as Figure 1 As shown, a heat source device for a temperature control system in a semi-enclosed greenhouse includes a heat recovery chiller unit 1, a cooling tower 2, a cold source side 3, a heat source side 4, and control valves 5. Different operating modes are executed by adjusting the opening and closing of different control valves 5 to achieve temperature control and heat / cold source storage. The heat recovery chiller unit 1 is an integrated heat source / cold source unit capable of active cooling and heating. During cooling, it recovers heat generated at the heat release end, and during heating, it recovers cold energy generated at the cold release end. The heat recovery chiller unit 1 includes a compressor, evaporator, condenser, and throttling element, as well as supporting circulation piping.

[0043] Cooling tower 2 is connected to heat recovery chiller unit 1 via pipeline, enabling the cooling of heat generated by heat recovery chiller unit 1 during operation. Cooling tower 2 can be selected as either an open or closed type, depending on requirements and its operating mode. If an open type cooling tower 2 is selected, a plate heat exchanger can be added between heat recovery chiller unit 1 and cooling tower 2 for heat exchange. Cooling tower 2 and heat recovery chiller unit 1 can be combined in a one-to-one configuration, or multiple cooling towers 2 and multiple heat recovery chiller units 1 can be connected by a single main pipe.

[0044] In cooling mode, the refrigerant absorbs heat from the cooling medium (water) in the evaporator, lowering the water temperature to form chilled water, which provides cooling capacity to the cold source side. Simultaneously, the heat absorbed by the refrigerant, along with the heat generated by the compressor, is released in the condenser to the cooling water circuit, and can be transported through pipes to the cooling tower for external dissipation. In heating mode, by reversing the refrigeration cycle, the refrigerant circulation direction is reversed. The refrigerant absorbs heat from the environment or cooling water on the condenser side, heating the heat transfer medium to form hot water, providing heat to the heat source side. Meanwhile, the refrigerant releases cooling capacity on the evaporator side, lowering the circulating water temperature. The excess cooling capacity is transported through the cooling water circuit to the cooling tower for external discharge.

[0045] The cold source side 3 includes a cold source side heat exchanger unit 303, a cold storage tank 301, and a cold end 306. The cold storage tank 301 is connected in parallel to the connecting pipe between the heat recovery chiller unit 1 and the cold source side heat exchanger unit 303 via a pipeline. The cold end 306 is connected to the cold source side heat exchanger unit 303 via a pipeline. Control valves 5 are installed between the heat recovery chiller unit 1 and the cold storage tank 301, and between the heat recovery chiller unit 1 and the cold source side heat exchanger unit 303. The flow pattern of the chilled water output from the heat recovery chiller unit 1 and the cold storage tank 301 can be controlled by the control valves 5. Specifically, the chilled water generated by the heat recovery chiller unit 1 can selectively flow into the cold storage tank 301 for cold storage, or it can flow into the cold source side heat exchanger unit 303 to exchange heat with the hot water from the cold end 306. The chilled water after heat exchange enters the cold end 306 for refrigeration, while the hot water returns to the heat recovery chiller unit 1. Alternatively, chilled water in the cold storage tank 301 can be selectively output to the heat exchange unit 303 on the cold source side for heat exchange with hot water from the cold end 306. During the cooling process of the heat recovery chiller unit 1, the generated heat can be released into the cooling water circuit and then either enter the cooling tower for external heat dissipation, or it can be selected to enter the heat storage tank for heat storage after heat exchange. The inlet of the heat storage tank 401 and the cooling tower 2 can be connected to the outlet of the cold water circuit of the heat recovery chiller unit 1 through pipes, and the flow direction of hot water in the cooling water circuit can be controlled by some control valves.

[0046] The heat source side 4 includes a heat exchanger unit 403, a heat storage tank 401, and a heat-consuming end 406. The heat storage tank 401 is connected in parallel to the connecting pipe between the heat recovery chiller unit 1 and the heat exchanger unit 403 via a pipeline. The heat-consuming end 406 is connected to the heat exchanger unit 403 via a pipeline. Similar to the cold source side 3, during the heating process, the flow pattern of the hot water output from the heat recovery chiller unit 1 and the heat storage tank 401 can be controlled by the control valve 5. Specifically, the hot water generated by the heat recovery chiller unit 1 can selectively flow into the heat storage tank 401 for heat storage, or it can flow into the heat exchanger unit 403 to exchange heat with the cold water from the heat-consuming end 406. The hot water after heat exchange enters the heat-consuming end 406 for heating, while the cold water returns to the heat recovery chiller unit 1. Alternatively, the hot water in the heat storage tank 401 can be selectively output to the heat exchange unit 303 on the cold source side to exchange heat with the cold water from the heat consumption end 406. During the heating process of the heat recovery chiller unit, the refrigerant releases cold energy on the evaporator side, which lowers the temperature of the circulating water. It can be either sent to the cooling tower to discharge the cold energy or enter the cold storage tank for cold storage. The inlet of the cold storage tank 301 and the cooling tower 2 can be connected to the outlet of the cold water circuit of the heat recovery chiller unit 1 through pipes, and the flow direction of the chilled water in the cooling water circuit can be controlled by some control valves.

[0047] In summary, the heat and cold source device provided in this embodiment can realize the recovery and reuse of heat and cold, significantly reducing energy waste and improving energy utilization efficiency. The device is equipped with a heat recovery chiller unit 1, which can effectively recover the waste heat generated by the heat recovery chiller unit 1 during cooling and the cold energy generated by the heat recovery chiller unit 1 during heating, avoiding the waste caused by the direct discharge of such redundant energy in traditional devices. At the same time, the cold storage tank 301 on the cold source side 3 and the heat storage tank 401 on the heat source side 4 can store the recovered cold energy and heat energy respectively, realizing energy buffering and scheduling, allowing redundant energy to be reused, significantly improving the energy utilization rate of the entire temperature control system, and reducing the operating energy consumption and cost of the greenhouse. On the other hand, for greenhouses, under high temperature and humidity conditions, to ensure that the set temperature and humidity inside a semi-enclosed greenhouse remain stable and meet standards, it is necessary to implement integrated cooling and dehumidification treatment of the air inside the greenhouse. Specifically, in the air dehumidification stage, a dedicated cold source is used to cool the air to the dew point temperature, causing the moisture in the air to condense into water droplets and be discharged, completing deep dehumidification; the dehumidified low-temperature air is then reheated with thermal energy to precisely raise it to the temperature range required for crop growth, ensuring stable and controllable temperature and humidity. In other words, in this environment, the greenhouse needs to be cooled down first, and then heated up. Under low temperature and low humidity conditions, hot water (steam) needs to be sprayed into the air inside the semi-enclosed greenhouse to increase the air humidity. After the humidity is increased, the air temperature rises, requiring further cooling treatment using a cold source to adjust the temperature and humidity to the set range to meet the needs of crop growth. In other words, in this environment, the greenhouse needs to be humidified and heated first, and then cooled down. It is evident that semi-enclosed greenhouses require the simultaneous use of cold and heat sources, or the simultaneous use of cold and heat sources, or the use of either cold or heat sources alone, depending on the region, weather type, and time of day. Therefore, the cold and heat source devices must be capable of providing cold and heat sources at any time.

[0048] In this embodiment, the cold and heat source device can perform both cooling and heating functions, improving environmental adaptability and control flexibility. Through the coordinated operation of the heat recovery chiller unit 1 with the cold source side 3 and the heat source side 4, the device can flexibly switch between cooling and heating modes according to the actual temperature control needs of the semi-enclosed greenhouse. There is no need to set up separate refrigeration and heating units, which simplifies the device structure and effectively solves the problem of poor ability to cope with environmental changes in the existing single mode. It can adapt to temperature fluctuations in different seasons and at different times, and meet the temperature control needs of the greenhouse around the clock.

[0049] On the other hand, it can achieve precise temperature and humidity control, ensuring the stability of the greenhouse planting environment: heat exchange units are set on the cold source side 3 and the heat source side 4 respectively, and the cold storage tank 301 and the heat storage tank 401 are connected in parallel to the corresponding connecting pipes. With the help of the control valves 5 set on the pipes on both sides, the amount and speed of cold and heat transmission can be precisely adjusted, realizing precise control of the output energy of the cold end 306 and the heat end 406; at the same time, through the buffering effect of the cold storage tank 301 and the heat storage tank 401, the sudden rise and fall of temperature during the temperature control process can be avoided, further improving the stability and accuracy of temperature control, and thus optimizing the temperature and humidity environment in the greenhouse.

[0050] Based on the aforementioned heat source and cold source device, this embodiment provides a control method for a temperature control system in a semi-enclosed greenhouse. Using the aforementioned heat source and cold source device, the water circulation path and circulation volume in each pipe are adjusted via control valve 5 to achieve the following control modes: The first cooling and cold storage mode: The water source circulates between the cooling end of the heat recovery chiller unit 1, the cold storage tank 301, and the cooling tower 2. After cooling, the heat recovery chiller unit 1 stores the chilled water in the cold storage tank 301. Specifically, the corresponding control valve 5 is activated to form a closed-loop circulation of the water source: "cooling end of heat recovery chiller unit 1 → cold storage tank 301 → cooling tower 2 → cooling end of heat recovery chiller unit 1". The heat recovery chiller unit 1 starts its cooling function, cooling the circulating water source into chilled water. The cooled chilled water is then transported to the cold storage tank 301 for storage, completing the cold capacity reserve. The cooling tower 2 operates synchronously to dissipate the heat generated during the cooling process of the heat recovery chiller unit 1, ensuring stable cooling by the unit. This mode is mainly used during periods of low cooling demand to reserve cold capacity in advance for subsequent use.

[0051] Cooling mode: The water source circulates between the cold storage tank 301 and the heat exchange unit 303 on the cold source side. The chilled water flowing out of the cold storage tank 301 exchanges heat with the hot water at the cooling end 306 in the heat exchange unit 303 on the cold source side. Specifically, the control valves 5 corresponding to the heat recovery chiller unit 1 and the cooling tower 2 are closed, and the control valve 5 between the cold storage tank 301 and the heat exchange unit 303 on the cold source side is opened, allowing the water source to circulate between the cold storage tank 301 and the heat exchange unit 303 on the cold source side. The chilled water stored in the cold storage tank 301 flows into the heat exchange unit 303 on the cold source side, where it exchanges heat with the hot water from the cooling end 306, reducing the temperature of the hot water at the cooling end 306 and providing cooling for the greenhouse. The water after heat exchange flows back to the cold storage tank 301, completing the cooling cycle. This mode is suitable for scenarios where cooling demand is moderate and there is no need to start the cooling unit.

[0052] Cooling Mode: The water source circulates between the cooling end of heat recovery chiller unit 1, the heat exchanger unit 303 on the cold source side, and the cooling tower 2, exchanging heat with the hot water at the cooling end 306 in the heat exchanger unit 303 on the cold source side. Specifically, heat recovery chiller unit 1, heat exchanger unit 303 on the cold source side, and cooling tower 2 are started, and control valve 5 is adjusted to form a closed-loop circulation of the water source: "cooling end of heat recovery chiller unit 1 → heat exchanger unit 303 on the cold source side → cooling tower 2 → cooling end of heat recovery chiller unit 1". The chilled water produced by heat recovery chiller unit 1 is directly delivered to the heat exchanger unit 303 on the cold source side for heat exchange with the hot water at the cooling end 306, achieving real-time cooling; cooling tower 2 continuously dissipates heat to ensure the unit's cooling efficiency. This mode is suitable for conventional scenarios with stable cooling demand and no need for cold storage.

[0053] The second refrigeration and cold storage mode: The water source circulates between the cooling end of the heat recovery chiller unit 1, the cold storage tank 301, the cold source-side heat exchanger unit 303, and the cooling tower 2. The water circulation volume between the heat recovery chiller unit 1, the cold storage tank 301, and the cold source-side heat exchanger unit 303 is regulated. Chilled water and hot water at the cooling end 306 exchange heat at the cold source-side heat exchanger unit 303. Specifically, the control valves 5 corresponding to the heat recovery chiller unit 1, the cold storage tank 301, the cold source-side heat exchanger unit 303, and the cooling tower 2 are opened to form a circulation loop between the four components. By adjusting the opening of control valve 5, the water circulation volume between heat recovery chiller unit 1, cold storage tank 301, and cold source side heat exchanger unit 303 is precisely adjusted. Part of the chilled water is sent to cold source side heat exchanger unit 303 to exchange heat with hot water at the cooling end 306 to achieve real-time cooling. The other part of the chilled water is sent to cold storage tank 301 for storage, taking into account both real-time cooling and cold capacity reserve, and adapting to scenarios with large fluctuations in cooling demand.

[0054] Cooling and Cooling Mode: The water source circulates between the cooling end of the heat recovery chiller unit 1, the cold source-side heat exchanger unit 303, and the cooling tower 2. Simultaneously, chilled water from the cold storage tank 301 is transported to the cold source-side heat exchanger unit 303 for heat exchange with the hot water at the cooling end 306. Specifically, the heat recovery chiller unit 1, the cold source-side heat exchanger unit 303, and the cooling tower 2 are started to ensure normal water circulation among them. At the same time, the control valve 5 between the cold storage tank 301 and the cold source-side heat exchanger unit 303 is opened. The chilled water produced by the heat recovery chiller unit 1 and the chilled water stored in the cold storage tank 301 are synchronously transported to the cold source-side heat exchanger unit 303, where they exchange heat with the hot water at the cooling end 306, increasing the cooling capacity. This mode is suitable for peak cooling periods and meets instantaneous high cooling demands.

[0055] Cooling and heat storage mode: One water source circulates between the cooling end of the heat recovery chiller unit 1 and the cold storage tank 301 for cooling and cold storage, or circulates between the cooling end of the heat recovery chiller unit 1 and the heat exchange unit 306 on the cold source side for cooling. The other water source circulates between the cooling heat release end of the heat recovery chiller unit 1 and the heat storage tank 401, recovering the cooling heat and storing it in the heat storage tank 401. Specifically, the water source is divided into two independent circulation loops by the control valve 5. One water source circulates between the cooling end of the heat recovery chiller unit 1 and the cold storage tank 301. After cooling, the chiller unit 1 stores the chilled water in the cold storage tank 301, completing the cold energy storage. The other water source circulates between the cooling heat release end of the heat recovery chiller unit 1 and the heat storage tank 401, recovering the excess heat generated during the unit's cooling process and storing the hot water in the heat storage tank 401. This achieves simultaneous cold energy storage and heat recovery, maximizing energy utilization.

[0056] The first heating and heat storage mode: The water source circulates between the heating end of the heat recovery chiller unit 1, the heat storage tank 401, and the cooling tower 2. After heating, the heat recovery chiller unit 1 stores the hot water in the heat storage tank 401. Specifically, the corresponding control valve 5 is activated to create a closed-loop circulation of the water source: "Heating end of heat recovery chiller unit 1 → Heat storage tank 401 → Cooling tower 2 → Heating end of heat recovery chiller unit 1". The heat recovery chiller unit 1 starts its heating function, heating the circulating water into hot water. The heated hot water is then transported to the heat storage tank 401 for storage, completing the heat reserve. The cooling tower 2 assists in heat dissipation, ensuring stable heating by the unit. This mode is mainly used during periods of low heating demand to reserve heat in advance for subsequent use.

[0057] Heat release mode: The water source circulates between the heat storage tank 401 and the heat exchange unit 403 on the heat source side. The hot water flowing out of the heat storage tank 401 exchanges heat with the cold water at the heat consumption end 406 in the heat exchange unit 403 on the heat source side. Specifically, the control valve 5 corresponding to the closed-loop heat recovery chiller unit 1 and the cooling tower 2 is opened, allowing the water source to circulate between the heat storage tank 401 and the heat exchange unit 403 on the heat source side. The hot water stored in the heat storage tank 401 flows into the heat exchange unit 403 on the heat source side, where it exchanges heat with the cold water from the heat consumption end 406, raising the temperature of the cold water at the heat consumption end 406 and providing heating for the greenhouse. The water after heat exchange flows back to the heat storage tank 401, completing the heat release cycle. This mode is suitable for scenarios with moderate heating demand and where it is not necessary to start the unit for heating.

[0058] Heating Mode: The water source circulates between the heating end of the heat recovery chiller unit 1, the heat exchanger unit 403 on the heat source side, and the cooling tower 2, exchanging heat with the chilled water at the heat consumption end 406 in the heat exchanger unit 403. Specifically, the heat recovery chiller unit 1, the heat exchanger unit 403 on the heat source side, and the cooling tower 2 are started, and the control valve 5 is adjusted to form a closed-loop circulation of the water source: "heat recovery chiller unit 1 heating end → heat exchanger unit 403 on the heat source side → cooling tower 2 → heat recovery chiller unit 1 heating end". The hot water produced by the heat recovery chiller unit 1 is directly delivered to the heat exchanger unit 403 on the heat source side for heat exchange with the chilled water at the heat consumption end 406, achieving real-time heating; the cooling tower 2 continuously dissipates heat to ensure the unit's heating efficiency. This mode is suitable for conventional scenarios where the heating demand is stable and there is no need to store heat.

[0059] The second heating and heat storage mode: The water source circulates between the heating end of the heat recovery chiller unit 1, the heat storage tank 401, the heat source-side heat exchanger unit 403, and the cooling tower 2. The water circulation volume between the heat recovery chiller unit 1, the heat storage tank 401, and the heat source-side heat exchanger unit 403 is regulated. Hot water exchanges heat with cold water at the heat consumption end 406 in the heat source-side heat exchanger unit 403. Specifically, the control valves 5 corresponding to the heat recovery chiller unit 1, the heat storage tank 401, the heat source-side heat exchanger unit 403, and the cooling tower 2 are opened to form a circulation loop between the four components. By adjusting the opening of control valve 5, the water circulation between heat recovery chiller 1, heat storage tank 401, and heat source side heat exchanger 403 is precisely adjusted. Part of the hot water is sent to heat source side heat exchanger 403 to exchange heat with cold water at the heat consumption end 406 to achieve real-time heating, while the other part of the hot water is sent to heat storage tank 401 for storage, taking into account both real-time heating and heat storage, and adapting to scenarios with large fluctuations in heat demand.

[0060] Heating and heat release mode: The water source circulates between the heating end of the heat recovery chiller unit 1, the heat source-side heat exchanger unit 403, and the cooling tower 2. Simultaneously, hot water from the heat storage tank 401 is transported to the heat source-side heat exchanger unit 403 for heat exchange with the cold water at the heat consumption end 406. Specifically, the heat recovery chiller unit 1, the heat source-side heat exchanger unit 403, and the cooling tower 2 are started, allowing the water source to circulate normally among them. At the same time, the control valve 5 between the heat storage tank 401 and the heat source-side heat exchanger unit 403 is opened. The hot water produced by the heat recovery chiller unit 1 and the hot water stored in the heat storage tank 401 are synchronously transported to the heat source-side heat exchanger unit 403, where they exchange heat with the cold water at the heat consumption end 406, increasing the heat supply. This mode is suitable for peak heating periods and meets instantaneous high heating demands.

[0061] Heating and cooling storage mode: One water source circulates between the heating end of the heat recovery chiller unit 1 and the heat storage tank 401 for heating and heat storage, or circulates between the heating end of the heat recovery chiller unit 1 and the heat source-side heat exchanger unit 403 for heating. The other water source circulates between the heating and cooling end of the heat recovery chiller unit 1 and the cooling storage tank 301, recovering the cooling capacity and storing it in the cooling storage tank 301. Specifically, the water source is divided into two independent circulation loops by the control valve 5. One water source circulates between the heating end of the heat recovery chiller unit 1 and the heat storage tank 401. After the heat recovery chiller unit 1 heats the water, it stores the hot water in the heat storage tank 401, completing the heat storage. The other water source circulates between the heating and cooling end of the heat recovery chiller unit 1 and the cooling storage tank 301, recovering the excess cooling capacity generated during the heating process and storing the chilled water in the cooling storage tank 301. This achieves simultaneous heat storage and cooling capacity recovery, improving energy utilization efficiency.

[0062] Given the high sensitivity of crops to temperature, humidity, light, cleanliness, and viruses, the heating and cooling source system needs to consider the impact of significant weather fluctuations outside the semi-enclosed greenhouse on the temperature, humidity, and light levels inside, affecting crop quality and growth. Semi-enclosed greenhouses are equipped with active evaporative cooling (wet curtain + misting) systems, light enhancement systems, and air handling coil systems. During extreme weather and specific periods, the peak and off-peak values ​​for cooling and heating fluctuate greatly, with peak demand being 3-5 times higher than normal. This necessitates the heating and cooling source system to provide a massive amount of cooling and heating energy within a very short timeframe; designing it based on maximum capacity during initial construction would significantly increase the initial investment.

[0063] Based on this, in this embodiment, the heat source device, in addition to setting up a heat storage tank 401 on the heat source side 4 to increase the heating capacity, also includes a municipal heating heat exchanger unit 405, a boiler 404, and a heat source side manifold 4. The heat recovery chiller unit 1, the heat source side heat exchanger unit 403, and the municipal heating heat exchanger unit 405 are respectively connected to the heat source side manifold 4 via pipelines, forming a circulation loop. The heat storage tank 401 is connected in parallel between the heat source side manifold 4 and the heat recovery chiller unit 1 via pipelines. The boiler 404 is connected to the heat source side manifold 4 via pipelines, forming a circulation loop. In the event of a sudden increase in heating demand during extreme weather, the municipal heating heat exchanger unit 405, the boiler 404, the heat storage tank 401, and the heat recovery chiller unit 1 can be used together to heat the heat-consuming end 406, reducing the demand on the heating capacity of the heat recovery chiller unit 1 and lowering the initial investment cost.

[0064] For the cold source side 3, in addition to configuring the cold storage tank 301, a secondary heat exchange unit and a secondary water distribution unit for the cold source side 3 are additionally configured to realize secondary circulation heat exchange of cold energy, further explore the potential of cold energy utilization, and optimize the cooling effect of the cold source side 3.

[0065] In one embodiment, the heat recovery chiller unit 1 and the cooling tower 2 are configured as two or more sets, which are connected in parallel between the cold source side 3 and the heat source side 4. The heat recovery chiller unit 1 is modularly designed, with interfaces reserved in the piping system to connect multiple heat recovery chiller units 1. The number of heat recovery chiller units 1 can be increased or decreased according to actual needs, thereby adaptively adjusting the cooling and heating capacity of the entire device and making it more flexible in use.

[0066] In one exemplary embodiment of this application, the first refrigeration cold storage mode, refrigeration mode, second refrigeration cold storage mode, refrigeration cold release mode, refrigeration heat storage mode, first heating heat storage mode, heating mode, second heating heat storage mode, heating heat release mode, and heating cold storage mode are configured to be executed during off-peak electricity periods. The cold release mode and heat release mode are configured to be executed during peak electricity periods.

[0067] Specifically, the division of time periods and peak periods should be implemented with reference to the peak-valley electricity price standards published by the local power grid supply department. It can be flexibly adapted and adjusted according to the electricity demand of actual application scenarios (such as residential buildings, commercial buildings, industrial plants, etc.) and the power grid time period adjustment rules to ensure that the time period division is accurately matched with the electricity price policy and the actual electricity load demand.

[0068] For example, the off-peak electricity period can be set from 23:00 to 7:00 the next day, during which the electricity price is 1 / 3 to 1 / 2 of the peak electricity price, offering a significant price advantage. The peak electricity period can be set from 8:00 to 22:00 daily, during which electricity prices are higher and the grid load is greater. The system can preset the time period parameters through the time controller to achieve automatic start, switching, and stop of each mode during the corresponding time period without manual intervention.

[0069] During off-peak hours, the system primarily performs energy storage and direct cooling / heating operations. Through flexible switching between 10 subdivided operating modes, it maximizes the utilization of low-cost off-peak energy, storing cooling / heat for peak-hour demand while also meeting any potential short-term energy needs during off-peak periods. During peak hours, the system operates in cooling and heating release modes, eliminating the need to start energy-consuming equipment such as chillers and heating units. It relies entirely on the cooling / heat stored during off-peak hours to meet the load's energy needs, fundamentally reducing high-priced electricity consumption during peak hours and achieving the core objective of "off-peak energy storage, peak-hour energy use."

[0070] In another embodiment, reference Figures 2 to 4 The device shown is a heat source and cold source device for a temperature control system in a semi-enclosed greenhouse. It includes a heat recovery chiller unit 1, a cooling tower 2, a cold source side 3, a heat source side 4, pipes connecting the various parts, and control valves consisting of electric valves V1-V8. Electric valves V1-V3 are used to control the cold source side 3, and electric valves V4-V8 are used to control the heat source side 4. By adjusting the opening and closing of electric valves V1-V8 on the pipes, different working modes are executed to achieve temperature and humidity control and cold and heat energy storage.

[0071] The cold source side 3 includes a cold storage tank 301, a cold source side primary manifold 302, a cold source side heat exchanger unit 303, and a cold end 306. The cold source side primary manifold 302 consists of a cold source side distributor and a cold source side collector. The cold source side heat exchanger unit 303 can be a plate heat exchanger unit. The electric valve V1 is installed on the pipeline connecting the heat recovery chiller unit 1 and the cold source side primary manifold 302. The electric valves V2 and V3 are both installed on the pipeline connecting the heat recovery chiller unit 1 and the cold storage tank 301.

[0072] The heat source side 4 includes a heat storage tank 401, a heat source side manifold 402, a heat source side heat exchange unit 403, a boiler 404, a municipal heating heat exchange unit 405, and a heat-consuming end 406. The heat source side manifold 402 consists of a heat source side distributor and a heat source side collector. The heat source side heat exchange unit 403 can be a plate heat exchange unit. An electric valve V5 is installed on the pipeline connecting the heat recovery chiller unit 1 and the heat source side manifold 402. An electric valve V7 is installed on the pipeline connecting the heat source side manifold 402 and the boiler 404. An electric valve V8 is installed on the pipeline connecting the boiler 404 and the municipal heating heat exchange unit 405.

[0073] The combination of the heat source side 4 of the heat recovery chiller unit with the heat storage tank 401, boiler 404, municipal heating heat exchanger unit 405, and heat source side manifold 402, and the combination of the cold source side 3 with the cold storage tank 301, cold source side heat exchanger unit 303, and cold source side primary manifold 302, allows for the adjustment of different working modes by regulating the opening, closing, and degree of opening and closing of valves on the pipeline, thereby achieving temperature and humidity control in the semi-enclosed greenhouse.

[0074] The cold source side 3 also includes a cold source secondary side water manifold 304 and a cold source side secondary heat exchanger unit 305. The cold source secondary side water manifold 304 consists of a cold source secondary side water distributor and a cold source secondary side water collector. The cold source secondary side device can be selected according to the user's cooling terminal needs. It can be directly connected to the user's cooling terminal from the cold source side, or a secondary side circulation can be added.

[0075] In the implementation of this invention, the number of heat recovery chiller unit 1 and cooling tower 2 in the device can be increased or decreased according to demand, and the increase or decrease in number will not affect the various working modes of the system; the plate heat exchanger unit can be replaced by a combination of circulating water pump, plate heat exchanger and filter, instrument, valve, pipeline and control power supply and sensor.

[0076] The water pumps in the plate heat exchanger unit and heat recovery chiller unit 1 can be either variable frequency pumps or fixed frequency pumps, and the quantity can be one or more, with standby pumps available; adjustments can be made according to different user operating requirements.

[0077] The power supply for the device of the present invention can be centralized, i.e., by setting up integrated module power supply, or it can be distributed, as long as it meets the power demand of the system.

[0078] Cold storage tank 301 and heat storage tank 401 can store energy using water or other media.

[0079] In the device of the present invention, the method of direct heating and heat storage by the heat recovery chiller unit can be replaced by a method of heating and heat storage by combining a non-heat recovery chiller unit and a heat recovery hydraulic module.

[0080] In one embodiment, for such Figure 1The operating modes of the heat source / cold source device shown are as follows: Cold source side working mode 1: In this mode, heat recovery chiller 1 and cold storage tank 301 are working, electric valves V1-V3 are open, cold source side heat exchanger 303 and cold source side secondary heat exchanger 305 are not working, and cold source side primary manifold 302 and cold source side secondary manifold 304 are not running. In this mode, the cold end 306 does not provide cooling. The water source passes through the heat recovery chiller unit 1, and the electric valves V1 and V2 are opened. After being collected, the water enters the cold storage tank 301 through the electric valve V3, and then returns to the heat recovery chiller unit 1 through the pipeline, forming a cycle. In this mode, the circulating water passes through the heat recovery chiller unit 1, and the 6°C chilled water enters the cold storage tank 301 to complete the cold storage.

[0081] The second working mode on the cold source side is the cold storage tank 301 cold release mode. In this mode, the heat recovery chiller unit 1 does not work, while the cold storage tank 301, the cold source side heat exchanger unit 303 and the cold source side secondary heat exchanger unit 305 work, and the cold source side primary manifold 302 and the cold source side secondary manifold 304 are in operation. In this mode, the cold end 306 is used for cooling, the cold storage tank 301 is used for cooling, the electric valve V3 is opened, the chilled water supply passes through the cold source side heat exchange unit 303, and completes heat exchange with the cold source secondary side manifold 304 and the cold source side secondary heat exchange unit 305, and returns to the cold storage tank 301. The return water pipes of the cold source secondary side manifold 304 and the cold source side secondary heat exchange unit 305 are cooled by heat exchange and enter the cold source side secondary heat exchange unit 305. The chilled water return from the cold end 306 completes heat exchange with the cold source secondary side manifold 304 and the cold source side secondary heat exchange unit 305, and enters the chilled water supply pipe of the cold end 306, thus realizing the cooling of the cold end 306. In this mode, heat recovery chiller unit 1 is not working, electric valves V1 and V2 are closed, and electric valve V3 is open; In this mode, the circulating water on the cold source side 3 passes sequentially through the cold storage tank 301, electric valve V3, cold source side water distributor, cold source side heat exchange unit 303, and cold source side water collector, and then returns to the cold storage tank 301 to complete one cycle; the circulating water that has completed heat exchange in the cold source secondary side water distributor 304 and the cold source secondary heat exchange unit 305 enters the cold source secondary side water distributor, and then returns to the cold source secondary side water collector from the cold source secondary side water distributor through the cold source secondary heat exchange unit 305 to complete the secondary cycle; In this mode, the cold energy stored in the cold storage tank 301 is released and exchanges heat with the circulating water at the cold end 306 through the cold source side 3 and the cold source side secondary heat exchange unit 305.

[0082] The third working mode on the cold source side is the refrigeration mode. In this mode, the cold storage tank 301 does not work, the cold source side heat exchanger 303 and the cold source side secondary heat exchanger 305 work, and the cold source side primary manifold 302 and the cold source side secondary manifold 304 are in operation. In this mode, the cold end 306 is used for cooling, and the heat recovery chiller unit 1 is in operation. Electric valves V1 and V2 are opened, and the chilled water flows out through the cold source side heat exchanger unit 303, and completes heat exchange with the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305, before returning to the heat recovery chiller unit 1. The return water pipes of the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305 are cooled by heat exchange and then enter the cold source side secondary heat exchanger unit 305. The chilled water return from the cold end 306 completes heat exchange with the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305, before entering the chilled water supply pipe of the cold end 306, thus realizing the cooling of the cold end 306. In this mode, the cold storage tank 301 is not working, electric valves V1 and V2 are open, and electric valve V3 is closed. In this mode, the circulating water on the cold source side 3 passes through the heat recovery chiller unit 1, electric valves V1 and V2, the cold source side water distributor, the cold source side heat exchanger unit 303, and the cold source side water collector, and then returns to the heat recovery chiller unit 1 to complete one cycle; the circulating water that has completed heat exchange in the cold source secondary side water distributor unit 304 and the cold source side secondary heat exchanger unit 305 enters the cold source secondary side water distributor, passes through the cold source side secondary heat exchanger unit 305, and returns to the cold source secondary side water collector to complete the secondary cycle; In this mode, the circulating water passes through the heat recovery chiller unit 1, outputting 6°C chilled water, and then exchanges heat with the circulating water at the cold end 306 via the cold source side 3 and the cold source side secondary heat exchanger unit 305.

[0083] The fourth working mode on the cold source side is the refrigeration and cold storage mode. In this mode, the heat recovery chiller unit 1 and the cold storage tank 301 are working, the cold source side heat exchanger unit 303 and the cold source side secondary heat exchanger unit 305 are working, and the cold source side primary manifold 302 and the cold source side secondary manifold 304 are operating. In this mode, the cold end 306 is used for cooling, and the heat recovery chiller unit 1 is in operation. Electric valves V1 and V2 are opened, and the chilled water flows through the cold source side heat exchanger unit 303, exchanges heat with the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305, and returns to the heat recovery chiller unit 1. The return water pipes of the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305 are cooled by heat exchange and enter the cold source side secondary heat exchanger unit 305. The chilled water return from the cold end 306 exchanges heat with the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305 and enters the chilled water supply pipe of the cold end 306. At the same time, the opening of the electric valve V3 is adjusted to store the excess cold energy in the cold storage tank 301, realizing the cooling of the cold end 306 and the cold storage tank 301. In this mode, the heat recovery chiller unit 1 and the cold storage tank 301 are working, electric valves V1 and V2 are open, and electric valve V3 is adjusted. In this mode, the circulating water passes through the heat recovery chiller unit 1, outputting 6°C chilled water. It then exchanges heat with the circulating water at the cold end 306 via the cold source side 3 and the secondary heat exchanger unit 305 on the cold source side, and stores the excess cold energy in the cold storage tank 301.

[0084] Cold source side working mode five, namely refrigeration and cooling mode: In this mode, heat recovery chiller unit 1 and cold storage tank 301 work, cold source side heat exchanger unit 303 and cold source side secondary heat exchanger unit 305 work, cold source side primary manifold 302 and cold source side secondary manifold 304 operate. In this mode, the cold end 306 is used for cooling, and the heat recovery chiller unit 1 is in operation. Electric valves V1 and V2 are opened. At the same time, according to the needs of the cold end 306, the opening degree of electric valve V3 is adjusted, the cold storage tank 301 releases cold water, and the chilled water passes through the cold source side heat exchanger unit 303, and completes heat exchange with the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305, and returns to the heat recovery chiller unit 1. The return water pipes of the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305 are cooled by heat exchange and enter the cold source side secondary heat exchanger unit 305. The chilled water return water from the cold end 306 completes heat exchange with the cold source secondary side manifold 304 and the cold source side secondary heat exchanger unit 305, and enters the chilled water supply pipe of the cold end 306. In this mode, the circulating water on the cold source side 3 passes through the heat recovery chiller unit 1, electric valves V1 and V2, cold storage tank 301, electric valve V3, cold source side water distributor, cold source side heat exchanger unit 303, and cold source side water collector, and then returns to the heat recovery chiller unit 1 and cold storage tank 301 to complete one cycle; the circulating water that has completed heat exchange in the cold source secondary side water distributor 304 and the cold source secondary heat exchanger unit 305 enters the cold source secondary side water distributor, passes through the cold source secondary heat exchanger unit 305, and returns to the cold source secondary side water collector to complete the secondary cycle.

[0085] Heat source side working mode one, namely heating and heat storage mode: In this mode, heat recovery chiller 1 and heat storage tank 401 are working, electric valves V4-V6 are open, heat source side heat exchanger 403, boiler 404, heat source side manifold 402, and municipal heating heat exchanger 405 are not working, and electric valves V7 and V8 are closed. In this mode, the hot end 406 does not generate heat. The water source passes through the heat recovery chiller unit 1, and the electric valves V4 and V5 are opened. After being collected, the water enters the heat storage tank 401 through the electric valve V6, and then returns to the heat recovery chiller unit 1 through the pipeline, forming a cycle. In this mode, the circulating water passes through the heat recovery chiller unit 1, and the 37°C hot water enters the heat storage tank 401 to complete the heat storage.

[0086] The second working mode on the heat source side is the heat release mode: In this mode, the heat recovery chiller unit 1 does not work, the heat storage tank 401, the heat source side manifold 402, and the heat source side heat exchanger unit 403 work, while the boiler 404 and the municipal heating heat exchanger unit 405 do not work. In this mode, the heat end 406 generates heat, the heat storage tank 401 releases heat, the electric valve V6 opens, the hot water supply passes through the heat exchanger unit 403 on the heat source side, completes heat exchange with the heat end 406, and returns to the heat storage tank 401; the hot water return water of the heat end 406 completes heat exchange with the heat source side 4, and enters the hot water supply pipe of the heat end 406, realizing the heating of the heat end 406. In this mode, heat recovery chiller unit 1 is not working, electric valves V4 and V5 are closed, and electric valve V6 is open. In this mode, the circulating water on the heat source side passes through the heat storage tank 401, electric valve V6, heat source side water distributor, heat source side heat exchanger 403 and heat source side water collector in sequence, and then returns to the heat storage tank 401 to complete the circulation. In this mode, the heat stored in the heat storage tank 401 is released and exchanges heat with the circulating water at the heat source side 406 through the heat source side 4.

[0087] Heat source side working mode three, namely heating mode: In this mode, the heat storage tank 401, boiler 404, and municipal heating heat exchange unit 405 do not work, the heat source side heat exchange unit 403 works, and the heat source side manifold 402 operates. In this mode, the heating end 406 is used for heating, the heat recovery chiller unit 1 is running, the electric valves V4 and V5 are opened, the hot water passes through the heat exchanger unit 403 on the heat source side and completes heat exchange with the heating end 406, and returns to the heat recovery chiller unit 1; the hot water return water from the heating end 406 completes heat exchange with the heat source side 4 and enters the hot water supply pipe of the heating end 406, thus realizing the heating of the heating end 406. In this mode, the heat storage tank 401, boiler 404, and municipal heating heat exchange unit 405 are not working, electric valves V4 and V5 are open, and electric valves V6-V8 are closed. In this mode, the circulating water on the heat source side 4 passes through the heat recovery chiller unit 1, electric valves V4 and V5, the heat source side water distributor, the heat source side heat exchanger unit 403 and the heat source side water collector, and then returns to the heat recovery chiller unit 1 to complete the circulation. In this mode, the circulating water passes through the heat recovery chiller unit 1, outputting 37°C hot water, and then exchanges heat with the circulating water at the heat-using end 406 via the heat source side heat exchanger unit 403.

[0088] Heat source side working mode four: Boiler 404 heating mode; In this mode, boiler 404 works, heat source side heat exchanger 403 works, heat source side manifold 402 runs, heat recovery chiller 1, heat storage tank 401, and municipal heating heat exchanger 405 do not work. In this mode, the heating end 406 is used for heating, the boiler 404 is running, the electric valve V7 is opened, the hot water passes through the heat exchanger 403 on the heat source side, completes heat exchange with the heating end 406, and returns to the boiler 404; the hot water return water of the heating end 406 completes heat exchange with the heat source side 4 and enters the hot water supply pipe of the heating end 406, realizing the heating of the heating end 406. In this mode, heat recovery chiller unit 1, heat storage tank 401, and municipal heating heat exchanger unit 405 are not working; electric valve V7 is open, and electric valves V4, V5, V6, and V8 are closed. In this mode, the circulating water on the heat source side 4 passes through boiler 404, electric valve V7, heat source side water distributor, heat source side heat exchanger 403 and heat source side water collector, and then returns to boiler 404 to complete the circulation. In this mode, the circulating water passes through boiler 404 to produce hot water, which then exchanges heat with the circulating water at the heat-using end 406 via heat exchanger unit 403 on the heat source side.

[0089] Working mode 5 on the heat source side: Municipal heating mode; In this mode, the heat exchanger 405 for municipal heating is working, the heat exchanger 403 on the heat source side is working, the manifold 402 on the heat source side is running, and the heat recovery chiller 1, the heat storage tank 401, and the boiler 404 are not working. In this mode, the heating end 406 provides heating, the municipal heating heat exchange unit 405 operates, the electric valve V8 opens, and after exchanging heat with the municipal heating, the hot water passes through the heat source side heat exchange unit 403, completes heat exchange with the heating end 406, and then returns to the municipal heating heat exchange unit 405; the chilled water return from the heating end 406 completes heat exchange with the heat source side 4, and enters the hot water supply pipe of the heating end 406, thus realizing the heating of the heating end 406; In this mode, heat recovery chiller 1, heat storage tank 401, and boiler 404 are not working, electric valve V8 is open, and electric valves V4-V7 are closed. In this mode, the circulating water on the heat source side 4 passes through the municipal heating heat exchanger unit 405, electric valve V7, heat source side water distributor, heat source side heat exchanger unit 403 and heat source side water collector, and then returns to the boiler 404 to complete the circulation.

[0090] In this mode, the circulating water passes through the municipal heating heat exchanger unit 405 to produce hot water, which then exchanges heat with the circulating water at the heat-consuming end 406 via the heat source side heat exchanger unit 403.

[0091] Working mode 6 on the heat source side: municipal heating storage mode; In this mode, the heat exchanger 405 and the heat storage tank 401 for municipal heating are working, and the electric valves V6 and V8 are open. The heat recovery chiller 1, the heat exchanger 403 on the heat source side, the heat source side manifold 402 and the boiler 404 are not working, and the electric valves V4, V5 and V7 are closed. In this mode, the heat-using end 406 does not generate heat. The water source passes through the municipal heating heat exchange unit 405, the electric valve V7 is opened, and the water enters the heat storage tank 401 through the electric valve V6, and then returns to the municipal heating heat exchange unit 405 through the pipeline, forming a cycle. In this mode, the circulating water passes through the municipal heating heat exchanger unit 405, completes heat exchange with the municipal heating system, and the hot water enters the heat storage tank 401 to complete heat storage.

[0092] Heat source side working mode seven, namely heating and heat storage mode: In this mode, heat recovery chiller 1 and heat storage tank 401 work, heat source side heat exchanger 403 works, heat source side manifold 402 runs, and municipal heating heat exchanger 405 and boiler 404 do not work. In this mode, the hot end 406 provides heating, the heat recovery chiller unit 1 operates, and electric valves V4 and V5 are opened. The hot water passes through the heat exchanger unit 403 on the heat source side, exchanges heat with the hot end 406, and returns to the heat recovery chiller unit 1. The hot water return from the hot end 406 exchanges heat with the heat source side 4 and enters the hot water supply pipe of the hot end 406, thus achieving heating at the hot end 406. At the same time, the opening of the electric valve V6 is adjusted to store excess heat in the heat storage tank 401, thus achieving heat storage in the heat storage tank 401. In this mode, the heat recovery chiller unit 1 and the heat storage tank 401 are working, electric valves V4 and V5 are open, and electric valve V6 is adjusted. In this mode, the circulating water passes through the heat recovery chiller unit 1, outputting 37°C hot water. It then exchanges heat with the circulating water at the heat-consuming end 406 via the heat source side 4 and the heat source side heat exchanger unit 403, and stores the excess heat in the heat storage tank 401.

[0093] Working mode 8 on the heat source side: municipal heating and heat storage mode; in this mode, the heat exchanger 405 and heat storage tank 401 for municipal heating are working, the heat exchanger 403 on the heat source side is working, the heat source side manifold 402 is running, and the heat recovery chiller 1 and boiler 404 are not working. In this mode, the heating end 406 generates heat, the municipal heating heat exchanger unit 405 operates, the electric valve V8 is opened, and the hot water passes through the heat source side heat exchanger unit 403, exchanges heat with the heating end 406, and returns to the municipal heating heat exchanger unit 405; the hot water return from the heating end 406 exchanges heat with the heat source side 4, and enters the hot water supply pipe of the heating end 406, realizing the heating at the heating end 406; at the same time, the opening of the electric valve V6 is adjusted to store excess heat in the heat storage tank 401, realizing heat storage in the heat storage tank 401. In this mode, the municipal heating heat exchanger unit 405 and the heat storage tank 401 are working, the electric valve V7 is open, and the electric valve V6 is adjusted. In this mode, the circulating water passes through the municipal heating heat exchanger unit 405, exchanges heat with the municipal heating to produce hot water, and then exchanges heat with the circulating water at the heat-consuming end 406 through the heat source side 4 and the heat source side heat exchanger unit 403, and stores the excess heat in the heat storage tank 401.

[0094] Heat source side working mode nine: Combined heating mode; any two or three of the four devices, namely heat recovery chiller 1, heat storage tank 401, boiler 404, and municipal heating heat exchanger 405, can be used for combined heating; under extreme heat demand, all four devices can also work together for combined heating; in the combined heating mode, heat exchanger 403 and heat source side manifold 402 will be in operation, using heat end 406 for heating; When the heat recovery chiller unit 1 and the heat storage tank 401 are used for heating, the electric valves V4, V5 and V6 are opened, and the electric valves V7 and V8 are closed. Hot water is produced by the heat recovery chiller unit 1 and the heat storage tank 401 and enters the heat source side 4 to exchange heat with the heat-using end 406. When the heat recovery chiller unit 1 and the boiler 404 are used for heating, the electric valves V4, V5 and V7 are opened, and the electric valves V6 and V8 are closed. Hot water is produced by the heat recovery chiller unit 1 and the heat storage tank 401 and enters the heat source side 4 to exchange heat with the heat-using end 406. When the heat recovery chiller unit 1 and the municipal heating heat exchanger unit 405 are used together for heating, electric valves V4, V5 and V8 are opened and electric valves V6 and V7 are closed. Hot water is produced by the heat recovery chiller unit 1 and the municipal heating heat exchanger unit 405 and enters the heat source side 4 to exchange heat with the heat user end 406. When the heat storage tank 401 and the boiler 404 are used for heating, the electric valves V6 and V7 are opened and the electric valves V4, V5 and V8 are closed. Hot water is produced by the heat storage tank 401 and the boiler 404 and enters the heat source side 4 to exchange heat with the heat-using end 406. When the heat storage tank 401 and the municipal heating heat exchange unit 405 are used together for heating, the electric valves V6 and V8 are opened and the electric valves V4, V5 and V7 are closed. Hot water is produced by the heat storage tank 401 and the municipal heating heat exchange unit 405 and enters the heat source side 4 to exchange heat with the heat user end 406. When the municipal heating heat exchanger unit 405 and boiler 404 are used for heating in combination, electric valves V7 and V8 are opened and electric valves V4, V5 and V6 are closed. Hot water is produced by the municipal heating heat exchanger unit 405 and boiler 404 and enters the heat source side 4 to exchange heat with the heat user end 406. When the heat recovery chiller unit 1, the heat storage tank 401, and the boiler 404 are used for heating, the electric valves V4, V5, V6, and V7 are opened, and the electric valve V8 is closed. Hot water is produced by the heat recovery chiller unit 1, the heat storage tank 401, and the boiler 404 and enters the heat source side 4 to exchange heat with the heat-using end 406. When the heat recovery chiller unit 1, the heat storage tank 401, and the municipal heating heat exchanger unit 405 are used for heating in combination, electric valves V4, V5, V6, and V8 are opened, and electric valve V7 is closed. Hot water is produced by the heat recovery chiller unit 1, the heat storage tank 401, and the municipal heating heat exchanger unit 405 and enters the heat source side 4 to exchange heat with the heat-using end 406. When the heat recovery chiller unit 1, boiler 404, and municipal heating heat exchanger unit 405 are used for heating in combination, electric valves V4, V5, V7, and V8 are opened, and electric valve V6 is closed. Hot water is produced by the heat recovery chiller unit 1, boiler 404, and municipal heating heat exchanger unit 405 and enters the heat source side 4 to exchange heat with the heat-using end 406. When the heat storage tank 401, boiler 404, and municipal heating heat exchange unit 405 are used for heating in combination, electric valves V6, V7, and V8 are opened, and electric valves V4 and V5 are closed. Hot water is produced by the heat storage tank 401, boiler 404, and municipal heating heat exchange unit 405 and enters the heat source side 4 to exchange heat with the heat user end 406. When the heat recovery chiller unit 1, the heat storage tank 401, the boiler 404, and the municipal heating heat exchanger unit 405 are used for heating in combination, the electric valves V4, V5, V6, V7, and V8 are opened, and hot water is produced by the heat storage tank 401, the boiler 404, and the municipal heating heat exchanger unit 405, and enters the heat source side 4 to exchange heat with the heat-using end 406. When the heat recovery chiller unit 1 operates in the cold source side working mode, the heat source side can operate in various modes, namely heating and heat storage; or it can not operate in any mode on the heat source side, only circulating cooling water between the condenser and cooling tower 2. In this mode, all electric valves V4-V8 are closed, and the heat exchanger unit 403, the heat source manifold 402, the heat storage tank 401, the boiler 404, and the municipal heating heat exchanger unit 405 are not working. The water source is cooled by the cooling tower 2 and enters the heat recovery chiller unit 1. After being heated by the condenser, it is sent to the cooling tower 2 for cooling, completing the cooling water circulation.

[0095] Other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the embodiments thereof. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not claimed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

Claims

1. A cold and heat source device for a temperature control system in a semi-enclosed greenhouse, characterized in that, include: At least one heat recovery chiller unit; The cooling tower is connected to the heat recovery chiller unit via a pipeline; The cold source side includes a cold source side heat exchanger unit and a cold storage tank. The cold storage tank is connected in parallel to the connecting pipe between the heat recovery chiller unit and the cold source side heat exchanger unit through a pipeline. The cold source side heat exchanger unit is used to connect to the cooling end through a pipeline. The heat source side includes a heat source side heat exchanger unit and a heat storage tank. The heat storage tank is connected in parallel to the heat recovery chiller unit and the heat source side heat exchanger unit via a pipeline. The heat source side heat exchanger unit is used to connect to the heat-consuming end via a pipeline. Control valves are respectively installed on the connecting pipes of the cold source side and the heat source side.

2. The cold / heat source device according to claim 1, characterized in that, The heat source side also includes a municipal heating heat exchanger unit and a heat source side manifold. The heat recovery chiller unit, the heat source side heat exchanger unit, and the municipal heating heat exchanger unit are respectively connected to the heat source side manifold through pipelines and form a circulation loop. The heat storage tank is connected in parallel between the heat source side manifold and the heat recovery chiller unit through pipelines.

3. The cold / heat source device according to claim 1, characterized in that, The heat source side also includes a boiler and a heat source side manifold. The heat recovery chiller, the heat source side heat exchanger and the boiler are respectively connected to the heat source side manifold through pipelines and form a circulation loop. The heat storage tank is connected in parallel between the heat source side manifold and the heat recovery chiller through pipelines.

4. The cold / heat source device according to claim 1, characterized in that, The cold source side also includes a cold source side primary water manifold, which is connected between the heat recovery chiller and the cold source side heat exchanger via a pipeline, and the cold storage tank is connected in parallel between the cold source side primary water manifold and the heat recovery chiller via a pipeline.

5. The cold / heat source device according to claim 4, characterized in that, The cold source side also includes a cold source side secondary heat exchanger unit and a cold source side secondary water manifold. The cold source side secondary heat exchanger unit, the cold source side secondary water manifold, and the cold source side heat exchanger unit are connected in sequence to form a circulation loop. The cold source side secondary heat exchanger unit is used to connect to the cold end through a pipe.

6. The cold / heat source device according to claim 1, characterized in that, The heat recovery chiller and the cooling tower are configured in two or more sets, and the two or more sets of heat recovery chillers and cooling towers are connected in parallel between the cold source side and the heat source side.

7. The cold / heat source device according to claim 5, characterized in that, The control valves include electric valve V1, electric valve V2 and electric valve V3; The electric valve V1 is installed on the pipeline connecting the heat recovery chiller unit and the primary water distributor on the cold source side; The electric valves V2 and V3 are installed on the pipeline connecting the heat recovery chiller unit and the cold storage tank.

8. The cold / heat source device according to claim 3, characterized in that, The control valves include electric valve V4, electric valve V5, electric valve V6, electric valve V7, and electric valve V8. The electric valves V4 and V6 are installed on the pipeline connecting the heat recovery chiller unit and the heat storage tank. The electric valve V5 is installed on the pipeline connecting the heat recovery chiller unit and the heat source side manifold; The electric valve V7 is installed on the pipe connecting the heat source side manifold and the boiler; The electric valve V8 is installed on the pipeline connecting the boiler and the municipal heating heat exchange unit.

9. A cold and heat source device for a temperature control system in a semi-enclosed greenhouse, characterized in that: It includes a heat recovery chiller unit, a cooling tower, a cold source side, a heat source side, pipes connecting the various parts, and electric valves V1-V8. Electric valves V1-V3 are used for controlling the cold source side, and electric valves V4-V8 are used for controlling the heat source side. The cold source side includes a cold storage tank, a cold source side primary water manifold, a cold source side heat exchange unit, and a cold end. The cold source side primary water manifold consists of a cold source side water distributor and a cold source side water collector. The heat source side includes a heat storage tank, a heat source side manifold, a heat source side heat exchange unit, a boiler, a municipal heating heat exchange unit, and a heat-consuming end. The heat source side manifold consists of a heat source side distributor and a heat source side collector.

10. A control method for a temperature control system in a semi-enclosed greenhouse, characterized in that, By using the cold and heat source device as described in claim 1, and by controlling the water circulation path and circulation volume in each pipeline through control valves, at least one of the following control modes can be achieved: First refrigeration and cold storage mode: The water source circulates between the refrigeration end of the heat recovery chiller, the cold storage tank and the cooling tower. After the heat recovery chiller cools the water, it stores the chilled water in the cold storage tank. Cooling mode: The water source circulates between the cold storage tank and the heat exchange unit on the cold source side. The chilled water flowing out of the cold storage tank exchanges heat with the hot water at the cold end in the heat exchange unit on the cold source side. Cooling mode: The water source circulates between the cooling end of the heat recovery chiller, the heat exchanger on the cold source side, and the cooling tower, and exchanges heat with the hot water at the cold end in the heat exchanger on the cold source side. The second refrigeration and cold storage mode: the water source circulates between the cooling end of the heat recovery chiller, the cold storage tank, the cold source side heat exchanger and the cooling tower, and regulates the water circulation between the heat recovery chiller and the cold storage tank and the cold source side heat exchanger. The chilled water and the cold end hot water exchange heat in the cold source side heat exchanger. Cooling and cooling mode: The water source circulates between the cooling end of the heat recovery chiller, the heat exchanger on the cold source side, and the cooling tower. At the same time, the chilled water in the cold storage tank is transported to the heat exchanger on the cold source side to exchange heat with the hot water at the cooling end. Cooling and heat storage mode: One water source circulates between the cooling end of the heat recovery chiller and the cold storage tank for cooling and cold storage, while the other water source circulates between the cooling heat release end of the heat recovery chiller and the heat storage tank to recover the cooling heat and store it in the heat storage tank. First heating and heat storage mode: The water source circulates between the heating end of the heat recovery chiller, the heat storage tank and the cooling tower. After the heat recovery chiller heats the water, it stores the hot water in the heat storage tank. Heat release mode: The water source circulates between the heat storage tank and the heat exchange unit on the heat source side. The hot water flowing out of the heat storage tank exchanges heat with the cold water at the heat consumption end in the heat exchange unit on the heat source side. Heating mode: The water source circulates between the heating end of the heat recovery chiller, the heat exchanger on the heat source side, and the cooling tower, and exchanges heat with the chilled water at the heat end in the heat exchanger on the heat source side. The second heating and heat storage mode: the water source circulates between the heating end of the heat recovery chiller, the heat storage tank, the heat exchanger on the heat source side and the cooling tower. The water circulation volume between the heat recovery chiller and the heat storage tank and the heat exchanger on the heat source side is regulated. Hot water and cold water at the heat-consuming end exchange heat in the heat exchanger on the heat source side. Heating and heat release mode: The water source circulates between the heating end of the heat recovery chiller, the heat exchanger on the heat source side and the cooling tower. At the same time, the hot water in the heat storage tank is transported to the heat exchanger on the heat source side to exchange heat with the cold water at the heat-consuming end. Heating and cooling storage mode: One water source circulates between the heating end of the heat recovery chiller and the heat storage tank for heating and heat storage, while the other water source circulates between the heating and cooling end of the heat recovery chiller and the cooling storage tank to recover and store the cooling capacity in the cooling storage tank.

11. The control method according to claim 10, characterized in that, The first cooling and cold storage mode, the cooling mode, the second cooling and cold storage mode, the cooling and cold release mode, the cooling and heat storage mode, the first heating and heat storage mode, the heating mode, the second heating and heat storage mode, the heating and heat release mode, and the heating and cold storage mode are configured to be executed during off-peak electricity periods. The cooling mode and the heating mode are configured to be executed during peak power periods.

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