Low-grade energy driven high-temperature drying and refrigeration system and control method thereof

Abstract

The application provides a low-grade energy driven high-temperature drying and refrigeration system and a control method thereof. The high-temperature drying and refrigeration system comprises a gas storage tank, the gas storage tank comprises a tank body, a fixed baffle, a connecting piece, a first movable baffle and a second movable baffle. The fixed baffle divides the internal space of the tank body into a first cavity and a second cavity. The connecting piece penetrates through the fixed baffle. The first movable baffle is connected with one end of the connecting piece extending into the first cavity, and divides the first cavity into a first upper cavity and a first lower cavity. The second movable baffle is connected with one end of the connecting piece extending into the second cavity, and divides the second cavity into a second upper cavity and a second lower cavity. The system comprises a refrigeration system and a high-temperature drying system. The application solves the problem of providing a new method for obtaining a high-pressure gas source by using low-grade energy, and applying the method to a new system driven by low-grade heat source, which can simultaneously perform high-temperature drying and refrigeration.

Description

Technical Field

[0001] This invention relates to the field of low-grade heat source utilization technology, and more specifically, to a high-temperature drying and refrigeration system driven by low-grade energy and its control method. Background Technology

[0002] Only by scientifically and systematically advancing the energy structure and related industrial systems from high-carbon to low-carbon and green development, and forming an advanced "clean, low-carbon, safe and efficient" new energy system, can we support high-quality and sustainable development.

[0003] As a crucial means to achieve strategic goals of energy conservation and emission reduction, the utilization of low-grade thermal energy has enormous development potential and represents the forefront of scientific research in energy utilization. Thermal energy with temperatures below 200℃ is generally referred to as low-grade thermal energy, encompassing various types including industrial waste heat, geothermal energy, and ocean thermal energy conversion, characterized by its wide distribution and low energy density. However, low-grade thermal energy has not been fully utilized. Globally, a large amount of industrial waste heat is directly emitted into the environment in the form of air, steam, and water, with industrial waste heat with temperatures below 100℃ accounting for approximately 42%. Recycling and utilizing low-grade thermal energy not only helps alleviate energy shortages but also reduces environmental pollution, playing a vital role in promoting the sustainable development of human society.

[0004] High-temperature drying (typically operating within a temperature range of 110℃ to 140℃) is mainly used for drying structural materials such as wood. Traditional drying technologies, including hot air drying, infrared drying, and heat pump drying, have significant drawbacks, such as insufficient heating area in the drying chamber requiring optimization, excessive pressure loss in steam pipelines leading to serious resource waste, long cycle times, high drying costs, environmental pollution from refrigerant use, and high power consumption. Vortex tubes, on the other hand, are devices that achieve hot and cold flow separation without requiring electricity or other power sources, relying solely on compressed gas. Using vortex tubes for heating provides the necessary heat for high-temperature drying without consuming electricity, even when a compressed gas source is available.

[0005] Meanwhile, cooling needs are generally met through compression refrigeration technology, which consumes a lot of electricity and generates significant pollution. Heat-driven refrigeration, on the other hand, uses heat energy as the driving force for cooling. It is a highly efficient method of utilizing primary energy sources and can directly replace traditional electrically driven compression refrigeration technology. This reduces power consumption, significantly decreases indirect coal consumption and CO2 emissions, and greatly improves energy efficiency and economic benefits, representing a major breakthrough in energy-saving technology for the refrigeration industry. Furthermore, heat-driven refrigeration has low requirements for heat sources and can use low-grade heat energy, including industrial waste heat, solar energy, and geothermal energy. Collecting waste heat from industrial processes or utilizing renewable energy sources such as solar and geothermal energy for cooling is an effective way to improve energy utilization. Among these, jet refrigeration systems have a simple structure, good stability, and good efficiency, making them significant for research and application.

[0006] Therefore, the problem in the relevant technology is: to propose a new method for obtaining high-pressure gas source using low-grade energy and apply it to a new system driven by low-grade heat source that can simultaneously perform high-temperature drying and refrigeration. Summary of the Invention

[0007] The problem solved by this invention is to propose an innovative method for obtaining high-pressure gas using low-grade energy, and to apply it to a new system driven by a low-grade heat source that can simultaneously perform high-temperature drying and refrigeration.

[0008] To address the aforementioned problems, the primary objective of this invention is to provide a high-temperature drying and refrigeration system driven by low-grade energy.

[0009] The second objective of this invention is to provide a control method for a high-temperature drying and refrigeration system driven by low-grade energy.

[0010] To achieve the first objective of this invention, embodiments of this invention provide a low-grade energy-driven high-temperature drying and refrigeration system. The high-temperature drying and refrigeration system includes: a gas storage tank, comprising: a gas storage tank body; a fixed baffle dividing the internal space of the gas storage tank body into a first cavity and a second cavity; a connector penetrating the fixed baffle; a first movable baffle connected to one end of the connector extending into the first cavity, the first movable baffle dividing the first cavity into a first upper cavity and a first lower cavity, the first lower cavity being adjacent to the fixed baffle; and a second movable baffle. The second movable baffle is connected to one end of the connector that extends into the second cavity. The second movable baffle divides the second cavity into a second upper cavity and a second lower cavity. The second upper cavity is close to the fixed baffle. A refrigeration system is connected to the first upper cavity and is filled with refrigerant. The refrigeration system is driven by low-grade energy. A high-temperature drying system is connected to the second lower cavity and is filled with drying gas. The high-temperature drying system is driven by low-grade energy. The connector can move relative to the fixed baffle to change the volume of the first upper cavity and the second lower cavity.

[0011] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The solution of the present invention uses low-grade energy as a driving force and combines the high-temperature drying system and the refrigeration system through the gas storage tank, which effectively improves the utilization efficiency of low-grade energy.

[0012] In one embodiment of the present invention, the gas storage tank further includes a spring that connects a fixed baffle and a second movable baffle.

[0013] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the spring setting makes the solution of the present invention more perfect. After the dry gas in the second lower cavity is compressed, the spring can pull the second movable baffle back to its original position, thereby helping the subsequent operation of the refrigeration system and the high-temperature drying system.

[0014] In one embodiment of the present invention, the fixed baffle is provided with a through hole, and the connector passes through the through hole, the diameter of which is larger than that of the connector.

[0015] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: The solution of this embodiment can help the connector, the first movable baffle and the second movable baffle to move smoothly relative to the gas storage tank body, thereby helping the second movable baffle to compress the dry gas in the second lower cavity.

[0016] In one embodiment of the present invention, the gas storage tank further includes: a first valve for connecting the refrigeration system and the first upper cavity; a second valve for connecting the refrigeration system and the first upper cavity; a third valve for connecting the high-temperature drying system and the second lower cavity; and a fourth valve for connecting the high-temperature drying system and the second lower cavity.

[0017] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: by setting valves, the flow direction of drying gas between the gas storage tank and the high-temperature drying system, and the flow direction of refrigerant between the gas storage tank and the refrigeration system can be better controlled, thereby better controlling the utilization efficiency of low-grade energy by the high-temperature drying and refrigeration systems.

[0018] In one embodiment of the present invention, the refrigeration system includes: an ejector, the inlet of which is connected to a first valve; a condenser, the inlet of which is connected to the outlet of the ejector; a gas-liquid separator, the inlet of which is connected to the outlet of the condenser; a throttling element, the inlet of which is connected to the liquid outlet of the gas-liquid separator; an evaporator, the inlet of which is connected to the outlet of the throttling element, and the outlet of which is connected to the inlet of the ejector; a working fluid pump, the inlet of which is connected to the gas outlet of the gas-liquid separator; and a first generator, the inlet of which is connected to the outlet of the working fluid pump, and the outlet of which is connected to a second valve; wherein, low-grade energy exchanges heat with refrigerant in the first generator.

[0019] Compared with existing technologies, the technical effects achieved by this solution are as follows: The refrigeration scheme of this embodiment replaces traditional electrically driven compression refrigeration technology, which can reduce power consumption, significantly reduce indirect coal consumption and carbon dioxide emissions, and greatly improve energy efficiency and economic benefits. At the same time, the jet refrigeration system has a simple structure, good stability, and good efficiency. This embodiment effectively improves the efficiency of low-grade energy recovery and utilization.

[0020] In one embodiment of the present invention, the high-temperature drying system includes: a vortex tube, the inlet of which is connected to a third valve, wherein the drying gas enters the vortex tube and is divided into a hot fluid and a cold fluid, and the vortex tube includes a hot fluid outlet and a cold fluid outlet; a high-temperature drying chamber, the inlet of which is connected to the hot fluid outlet; and a second generator, the inlet of which is connected to the outlet of the high-temperature drying chamber and the cold fluid outlet; wherein, low-grade energy exchanges heat with the drying gas in the second generator.

[0021] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: The solution in this embodiment can utilize low-grade energy and a refrigeration system to perform high-temperature drying, effectively reducing resource waste.

[0022] In one embodiment of the present invention, the low-grade energy source is a low-grade heat source with a temperature of 60°C-100°C.

[0023] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: the energy supply requirements of the high-temperature drying and refrigeration system in this embodiment can be met in an energy-efficient manner by using a low-grade heat source of 60℃-100℃.

[0024] In one embodiment of the present invention, the high-temperature drying and refrigeration system includes multiple gas storage tanks, and the refrigeration system and the high-temperature drying system are respectively connected in parallel with the multiple gas storage tanks.

[0025] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: by setting up multiple gas storage tanks, the refrigeration system and the high-temperature drying system can operate continuously.

[0026] To achieve the second objective of this invention, embodiments of this invention provide a control method for a high-temperature drying and refrigeration system driven by low-grade energy. The control method is used to control a high-temperature drying and refrigeration system as described in any embodiment of this invention. The control method for each of a plurality of gas storage tanks includes: a first operating state: closing the first valve 171, the second valve 172, and the third valve 173, opening the fourth valve 174, and filling the second lower cavity 116 with drying gas; a second operating state: when the second lower cavity 116 is filled with drying gas, closing the first valve 171, the third valve 173, and the fourth valve 174, opening the second valve 172, and filling the second lower cavity 116 with drying gas; In the device 270, heat exchange occurs with the refrigerant. After the refrigerant heats up, it expands and increases in pressure. The first upper cavity 113 is filled with refrigerant, and the first movable baffle 140 is pushed by the refrigerant, causing the second movable baffle 150 to pressurize the dry gas in the second lower cavity 116. In the third operating state, the first valve 171 and the fourth valve 174 are closed, and the second valve 172 and the third valve 173 are opened, and the high-temperature drying system 300 starts the heating cycle. In the fourth operating state, when the second movable baffle 150 reaches the bottom of the second lower cavity 116, the second valve 172, the third valve 173 and the fourth valve 174 are closed, and the first valve 171 is opened, and the refrigeration system 200 starts the refrigeration cycle.

[0027] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Through the method of this embodiment, the refrigeration system in the high-temperature drying and refrigeration system can be controlled to carry out a refrigeration cycle, and the high-temperature drying system can carry out a heating and drying cycle, which effectively improves the utilization efficiency of low-grade energy.

[0028] In one embodiment of the present invention, the control method includes controlling multiple gas storage tanks to be in different operating states, so that the refrigeration system and the high-temperature drying system are continuously in a cyclical working state.

[0029] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the method of this embodiment enables the refrigeration system and the high-temperature drying system to be in a continuous cycle, effectively improving the working efficiency of the high-temperature drying and refrigeration system and the utilization efficiency of low-grade energy. Attached Figure Description

[0030] Figure 1 This is one of the structural schematic diagrams of a low-grade energy-driven high-temperature drying and refrigeration system according to some embodiments of the present invention;

[0031] Figure 2 This is a second schematic diagram of a low-grade energy-driven high-temperature drying and refrigeration system according to some embodiments of the present invention.

[0032] Figure 3 This is a schematic diagram illustrating the steps of a control method for a low-grade energy-driven high-temperature drying and refrigeration system according to some embodiments of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-Gas storage tank; 110-Gas storage tank body; 111-First cavity; 112-Second cavity; 113-First upper cavity; 114-First lower cavity; 115-Second upper cavity; 116-Second lower cavity; 120-Fixed baffle; 130-Connector; 140-First movable baffle; 150-Second movable baffle; 160-Spring; 171-First valve; 172-Second valve; 173-Third valve; 174-Fourth valve; 200-Refrigeration system; 210-Ejector; 220-Condenser; 230-Gas-liquid separator; 240-Throttling element; 250-Evaporator; 260-Working fluid pump; 270-First generator; 300-High temperature drying system; 310-Vortex tube; 311-Hot fluid outlet; 312-Cold fluid outlet; 320-High temperature drying chamber; 330-Second generator. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] [First Embodiment]

[0037] See Figure 1This embodiment provides a high-temperature drying and refrigeration system driven by low-grade energy. The high-temperature drying and refrigeration system includes: a gas storage tank 100, which includes: a gas storage tank body 110; a fixed baffle 120 dividing the internal space of the gas storage tank body 110 into a first cavity 111 and a second cavity 112; a connector 130 penetrating the fixed baffle 120; a first movable baffle 140 connected to one end of the connector 130 extending into the first cavity 111, dividing the first cavity 111 into a first upper cavity 113 and a first lower cavity 114, with the first lower cavity 114 close to the fixed baffle 120; and a second movable baffle 150. The second movable baffle 150 is connected to one end of the connector 130 that extends into the second cavity 112, dividing the second cavity 112 into a second upper cavity 115 and a second lower cavity 116. The second upper cavity 115 is close to the fixed baffle 120. A refrigeration system 200 is connected to the first upper cavity 113, and is filled with refrigerant. The refrigeration system 200 is driven by low-grade energy. A high-temperature drying system 300 is connected to the second lower cavity 116, and is filled with drying gas. The high-temperature drying system 300 is driven by low-grade energy. The connector 130 can move relative to the fixed baffle 120 to change the volume of the first upper cavity 113 and the second lower cavity 116.

[0038] In this embodiment, the high-temperature drying and refrigeration system includes a gas storage tank 100, a refrigeration system 200, and a high-temperature drying system 300. Both the refrigeration system 200 and the high-temperature drying system 300 are driven by low-grade energy. The gas storage tank 100 includes a gas storage tank body 110, a fixed baffle 120, a connector 130, a first movable baffle 140, and a second movable baffle 150. The fixed baffle 120, connector 130, first movable baffle 140, and second movable baffle 150 divide the internal space of the gas storage tank body 110 into a first upper cavity 113, a first lower cavity 114, a second upper cavity 115, and a second lower cavity 116.

[0039] It should be noted that the connector 130 can move relative to the fixed baffle 120 to change the volume of the first upper cavity 113 and the second lower cavity 116. When the refrigerant in the refrigeration system 200 enters the first upper cavity 113, it will squeeze the first movable baffle 140. The force is transmitted to the second movable baffle 150 through the connector 130, compressing the space of the second lower cavity 116, thereby converting the dry gas in the second lower cavity 116 into high-pressure gas, which helps the heating cycle of the high-temperature drying system 300.

[0040] Understandably, the solution of the present invention utilizes low-grade energy as a driving force, and combines the high-temperature drying system 300 and the refrigeration system 200 through the gas storage tank 100, thereby effectively improving the utilization efficiency of low-grade energy.

[0041] Furthermore, the gas storage tank 100 also includes a spring 160, which connects the fixed baffle 120 and the second movable baffle 150.

[0042] In this embodiment, spring 160 connects fixed baffle 120 and second movable baffle 150. Before the refrigerant in the first upper cavity 113 compresses the first movable baffle 140, spring 160 is in its original length state. When the second movable baffle 150 compresses the dry gas in the second lower cavity 116 to its limit position, spring 160 is in a stretched state, and spring 160 pulls the second movable baffle 150 closer to fixed baffle 120.

[0043] Understandably, the spring 160 makes the solution of the present invention more perfect. After the dry gas in the second lower cavity 116 is compressed, the spring 160 can pull the second movable baffle 150 back to its original position, thereby helping the subsequent operation of the refrigeration system 200 and the high-temperature drying system 300.

[0044] Furthermore, the fixed baffle 120 is provided with a through hole, and the connector 130 passes through the through hole, the diameter of which is larger than that of the connector 130.

[0045] In this embodiment, the fixed baffle 120 is provided with a through hole, and the connector 130 passes through the through hole. The diameter of the through hole is larger than that of the connector 130, so that the first lower cavity 114 and the second upper cavity 115 are interconnected.

[0046] It should be noted that the first movable baffle 140 is sealed to the gas tank body 110 by a sealing ring, and the first upper cavity 113 and the first lower cavity 114 are not interconnected; the second movable baffle 150 is sealed to the gas tank body 110 by a sealing ring, and the second upper cavity 115 and the second lower cavity 116 are not interconnected.

[0047] Understandably, the configuration of this embodiment enables the connector 130, the first movable baffle 140, and the second movable baffle 150 to move smoothly relative to the gas storage tank body 110, thereby helping the second movable baffle 150 to compress the dry gas in the second lower cavity 116.

[0048] Furthermore, the gas storage tank 100 also includes: a first valve 171, which connects the refrigeration system 200 and the first upper cavity 113; a second valve 172, which connects the refrigeration system 200 and the first upper cavity 113; a third valve 173, which connects the high-temperature drying system 300 and the second lower cavity 116; and a fourth valve 174, which connects the high-temperature drying system 300 and the second lower cavity 116.

[0049] In this embodiment, the gas storage tank 100 further includes a first valve 171, a second valve 172, a third valve 173, and a fourth valve 174. The second valve 172 is used to connect the refrigeration system 200 and the first upper cavity 113, that is, the first upper cavity 113 is filled with refrigerant; the fourth valve 174 is used to connect the high-temperature drying system 300 and the second lower cavity 116, that is, the second lower cavity 116 is filled with drying gas.

[0050] Understandably, by setting valves, the flow direction of the drying gas between the gas storage tank 100 and the high-temperature drying system 300, and the flow direction of the refrigerant between the gas storage tank 100 and the refrigeration system 200 can be better controlled, thereby better controlling the utilization efficiency of low-grade energy by the high-temperature drying and refrigeration systems.

[0051] Further, the refrigeration system 200 includes: an ejector 210, the inlet of which is connected to a first valve 171; a condenser 220, the inlet of which is connected to the outlet of the ejector 210; a gas-liquid separator 230, the inlet of which is connected to the outlet of the condenser 220; a throttling element 240, the inlet of which is connected to the liquid outlet of the gas-liquid separator 230; an evaporator 250, the inlet of which is connected to the outlet of the throttling element 240, and the outlet of which is connected to the inlet of the ejector 210; a working fluid pump 260, the inlet of which is connected to the gas outlet of the gas-liquid separator 230; and a first generator 270, the inlet of which is connected to the outlet of the working fluid pump 260, and the outlet of which is connected to a second valve 172; wherein, low-grade energy exchanges heat with the refrigerant in the first generator 270.

[0052] In this embodiment, the refrigeration system 200 includes an ejector 210, a condenser 220, a gas-liquid separator 230, a throttling element 240, an evaporator 250, a working fluid pump 260, and a first generator 270. When the first generator 270 is heated by low-grade energy, the refrigerant absorbs heat and becomes a high-temperature, high-pressure refrigerant gas. This gas enters the first upper chamber 113 through the second valve 172, and then enters the nozzle of the ejector 210 as a working fluid through the first valve 171, undergoing an acceleration and expansion process. The refrigerant gas reaches supersonic speed at the nozzle outlet and generates a certain degree of vacuum in the vicinity of the nozzle outlet. The low-temperature, low-pressure refrigerant gas in the evaporator 250 is entrained into the ejector as an entrainer fluid under the action of pressure difference. After the working fluid and the entrainer fluid are fully mixed in the ejector, they form a mixed fluid with moderate pressure and enter the condenser 220 to release heat, forming a refrigerant liquid. A portion of the refrigerant liquid, after passing through the gas-liquid separator 230, experiences a pressure reduction after passing through the throttling element 240 and enters the evaporator 250. In the evaporator 250, it absorbs heat and evaporates to produce a cooling effect, then returns to the ejector 210 as an entrainer fluid. Another portion of the refrigerant liquid, driven by the working fluid pump 260, enters the first generator 270. In the first generator 270, it absorbs heat, and a portion of the refrigerant liquid, after passing through the throttling element 240, experiences a pressure reduction and then enters the evaporator 250, where it absorbs heat and evaporates to become refrigerant gas, producing a cooling effect. The other portion of the refrigerant liquid, driven by the working fluid pump 260, enters the first generator 270, completing the cycle.

[0053] It should be noted that the refrigerant is preferably a low-carbon and environmentally friendly refrigerant, such as R1234yf, R1233zd(E), R1234ze(E), R1336mzz(Z), or a natural working fluid such as R600.

[0054] Understandably, the refrigeration solution of this embodiment replaces traditional electrically driven compression refrigeration technology, which can reduce power consumption, significantly reduce indirect coal consumption and carbon dioxide emissions, and greatly improve energy efficiency and economic benefits. At the same time, the jet refrigeration system has a simple structure, good stability, and good efficiency. The solution of this embodiment effectively improves the efficiency of low-grade energy recovery and utilization.

[0055] Furthermore, the high-temperature drying system 300 includes: a vortex tube 310, the inlet of which is connected to a third valve 173, and the drying gas entering the vortex tube 310 is divided into a hot fluid and a cold fluid. The vortex tube 310 includes a hot fluid outlet 311 and a cold fluid outlet 312; a high-temperature drying chamber 320, the inlet of which is connected to the hot fluid outlet 311; and a second generator 330, the inlet of which is connected to the outlet of the high-temperature drying chamber 320 and the cold fluid outlet 312. In this process, low-grade energy exchanges heat with the drying gas in the second generator 330.

[0056] High-temperature drying (typically operating within a temperature range of 110℃ to 140℃) is mainly used for drying structural materials such as wood. Traditional drying technologies, including hot air drying, infrared drying, and heat pump drying, provide the heat source for high-temperature drying. However, these methods have significant drawbacks, such as insufficient heating area in the drying chamber requiring optimization, excessive pressure drop in steam pipelines leading to serious resource waste, excessively long cycle times, high drying costs, environmental pollution from refrigerant use, and high power consumption. The vortex tube 310 is a device that achieves hot and cold flow separation without requiring electricity or other power sources, relying solely on compressed gas as its power source. Using the vortex tube 310 for heating allows for the provision of the heat source required for high-temperature drying without consuming electricity, even when a compressed gas source is available. In this embodiment, compressed gas is obtained by compressing the drying gas within the second lower cavity 116 through the second movable baffle 150.

[0057] It should be noted that the drying gas is the gas used for drying, such as air, nitrogen, etc.

[0058] In this embodiment, the high-temperature drying system 300 includes a vortex tube 310, a high-temperature drying chamber 320, and a second generator 330. The vortex tube 310 includes a hot fluid outlet 311 and a cold fluid outlet 312. The drying gas in the second lower cavity 116 enters the vortex tube 310 through a third valve 173. The vortex tube 310 divides the pressurized gas into two streams: the hot fluid enters the high-temperature drying chamber 320 through the hot fluid outlet 311 for drying, and the cold fluid merges with the dried fluid through the cold fluid outlet 312 and enters the second generator 330 for preheating. Finally, the gas returns to the second lower cavity 116 through a fourth valve 174 to complete the cycle.

[0059] It should be noted that the cold flow ratio of the vortex tube 310 is 0.7 to 0.8.

[0060] Understandably, the solution in this embodiment can utilize low-grade energy and the refrigeration system 200 to perform high-temperature drying, effectively reducing resource waste.

[0061] Furthermore, low-grade energy refers to low-grade heat sources with temperatures ranging from 60°C to 100°C.

[0062] Understandably, a low-grade heat source of 60℃-100℃ can efficiently and energy-savingly meet the energy supply requirements of the high-temperature drying and refrigeration system in this embodiment.

[0063] Further, see Figure 2 The high-temperature drying and refrigeration system includes multiple gas storage tanks 100, and the refrigeration system 200 and the high-temperature drying system 300 are connected in parallel with the multiple gas storage tanks 100.

[0064] Understandably, by setting up multiple gas storage tanks 100, the refrigeration system 200 and the high-temperature drying system 300 can operate continuously.

[0065] [Second Embodiment]

[0066] See Figure 3 This embodiment provides a control method for a high-temperature drying and refrigeration system driven by low-grade energy. The control method is used to control the high-temperature drying and refrigeration system as described in any embodiment of the present invention. The control method for each of the plurality of gas storage tanks 100 includes:

[0067] S100: First operating state: Close the first valve 171, the second valve 172 and the third valve 173, open the fourth valve 174, and fill the second lower cavity 116 with dry gas;

[0068] S200: Second operating state: When the second lower cavity 116 is filled with dry gas, the first valve 171, the third valve 173 and the fourth valve 174 are closed, and the second valve 172 is opened. Low-grade energy exchanges heat with the refrigerant in the first generator 270. After the refrigerant heats up, it expands and pressurizes. The first upper cavity 113 is filled with refrigerant. The first movable baffle 140 is pushed by the refrigerant, so that the second movable baffle 150 pressurizes the dry gas in the second lower cavity 116.

[0069] S300: Third operating state: Close the first valve 171 and the fourth valve 174, open the second valve 172 and the third valve 173, and the high-temperature drying system 300 starts the heating cycle;

[0070] S400: Fourth operating state: When the second movable baffle 150 reaches the bottom of the second lower cavity 116, the second valve 172, the third valve 173 and the fourth valve 174 are closed, the first valve 171 is opened, and the refrigeration system 200 starts the refrigeration cycle.

[0071] Furthermore, in S100, the first valve 171, the second valve 172 and the third valve 173 are closed, and the fourth valve 174 is opened to inject dry gas into the second lower cavity 116 through the fourth valve 174.

[0072] Furthermore, in S200, when the second lower cavity 116 is filled with dry gas, the first valve 171, the third valve 173, and the fourth valve 174 are closed, and the second valve 172 is opened. Low-grade energy exchanges heat with the refrigerant in the first generator 270. After the refrigerant heats up, it expands and pressurizes. The first upper cavity 113 is filled with refrigerant. At this time, the refrigerant is a high-pressure gas. The first movable baffle 140 is pushed by the refrigerant in the state of high-pressure gas, so that the second movable baffle 150 pressurizes the dry gas in the second lower cavity 116, and the dry gas in the second lower cavity 116 is transformed into compressed gas.

[0073] Further, in S300, the first valve 171 and the fourth valve 174 are closed, and the second valve 172 and the third valve 173 are opened. The second movable baffle 150 continuously compresses the dry gas in the second lower cavity 116. The compressed dry gas enters the high-temperature drying system 300, and the high-temperature drying system 300 begins a heating cycle. It should be noted that the control method described in this embodiment is a control method for a single gas storage tank 100 when multiple gas storage tanks 100 exist. Therefore, after the fourth valve 174 is closed, the dry gas output by the second generator 330 in the high-temperature drying system 300 can enter other gas storage tanks 100 for a cyclic reaction. For the entire high-temperature drying and refrigeration system, the high-temperature drying system 300 is in a heating cycle.

[0074] Further, in S400, when the second movable baffle 150 reaches the bottom of the second lower cavity 116, the second valve 172, the third valve 173, and the fourth valve 174 are closed, and the first valve 171 is opened. At this time, the connector 130, the first movable baffle 140, and the second movable baffle 150 return under the action of the spring 160, and the refrigerant in the first upper cavity 113 enters the ejector 210, and the refrigeration system 200 begins a refrigeration cycle. It should be noted that the control method described in this embodiment is a control method for a single gas storage tank 100 when there are multiple gas storage tanks 100. Therefore, after closing the second valve 172, the refrigerant output by the first generator 270 in the refrigeration system 200 can enter other gas storage tanks 100 for cyclic reaction. For the entire high-temperature drying and refrigeration system, the refrigeration system 200 is in a refrigeration cycle.

[0075] Preferably, in this embodiment, the valve can be controlled by an electronic control device to achieve switching between different states of the high-temperature drying and refrigeration system.

[0076] Understandably, the method of this embodiment can control the refrigeration system 200 in the high-temperature drying and refrigeration system to perform a refrigeration cycle and the high-temperature drying system 300 to perform a heating and drying cycle, effectively improving the utilization efficiency of low-grade energy.

[0077] Furthermore, the control method includes controlling multiple gas storage tanks 100 to be in different operating states, so that the refrigeration system 200 and the high-temperature drying system 300 are continuously in a cyclical working state.

[0078] In the control method of this invention, during the control of a single gas storage tank 100, the refrigeration system 200 and the high-temperature drying system 300 cannot be in operation simultaneously, and there are situations where neither the refrigeration system 200 nor the high-temperature drying system 300 is in operation. In this embodiment, by controlling multiple gas storage tanks 100 to be in different operating states, and with the refrigeration system 200 and the high-temperature drying system 300 respectively connected to multiple gas storage tanks 100, the refrigerant in the refrigeration system 200 can continuously circulate, and the dry gas in the high-temperature drying system 300 can continuously circulate, thereby ensuring that the refrigeration system 200 and the high-temperature drying system 300 are continuously in a cyclical operating state.

[0079] Understandably, the method of this embodiment enables the refrigeration system 200 and the high-temperature drying system 300 to continuously operate in a cyclic state, effectively improving the working efficiency of the high-temperature drying and refrigeration systems and the utilization efficiency of low-grade energy.

[0080] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A high-temperature drying and refrigeration system driven by low-grade energy, characterized in that, The high-temperature drying and refrigeration system includes: A gas storage tank (100), the gas storage tank (100) comprising: Gas storage tank body (110); A fixed baffle (120) divides the internal space of the gas storage tank body (110) into a first cavity (111) and a second cavity (112); A connector (130) that penetrates the fixed baffle (120); A first movable baffle (140) is connected to one end of the connector (130) that extends into the first cavity (111). The first movable baffle (140) divides the first cavity (111) into a first upper cavity (113) and a first lower cavity (114). The first lower cavity (114) is close to the fixed baffle (120). The second movable baffle (150) is connected to one end of the connector (130) that extends into the second cavity (112). The second movable baffle (150) divides the second cavity (112) into a second upper cavity (115) and a second lower cavity (116). The second upper cavity (115) is close to the fixed baffle (120). A refrigeration system (200) is connected to the first upper cavity (113), the refrigeration system (200) is filled with refrigerant, and the refrigeration system (200) is driven by low-grade energy. A high-temperature drying system (300) is connected to the second lower cavity (116), the high-temperature drying system (300) is filled with drying gas, and the high-temperature drying system (300) is driven by the low-grade energy. The connector (130) is movable relative to the fixed baffle (120) to change the volume of the first upper cavity (113) and the second lower cavity (116); The gas storage tank (100) further includes: a first valve (171), a second valve (172), a third valve (173), and a fourth valve (174); The refrigeration system (200) includes: Injector (210), the inlet of which is connected to the first valve (171); A condenser (220) having its inlet connected to the outlet of the ejector (210); A gas-liquid separator (230) is provided, the inlet of which is connected to the outlet of the condenser (220); A throttling element (240) is provided, the inlet of which is connected to the liquid outlet of the gas-liquid separator (230). An evaporator (250) is provided, the inlet of which is connected to the outlet of the throttling element (240), and the outlet of which is connected to the inlet of the ejector (210). A working fluid pump (260) is provided, the inlet of which is connected to the gas outlet of the gas-liquid separator (230); A first generator (270) is connected to the outlet of the working fluid pump (260) at its inlet and to the second valve (172) at its outlet. The low-grade energy exchanged heat with the refrigerant in the first generator (270); The high-temperature drying system (300) includes: A vortex tube (310) is provided, the inlet of which is connected to the third valve (173). After the dry gas enters the vortex tube (310), it is divided into a hot fluid and a cold fluid. The vortex tube (310) includes a hot fluid outlet (311) and a cold fluid outlet (312). A high-temperature drying chamber (320) has its inlet connected to the hot fluid outlet (311); The second generator (330) has its inlet connected to the outlet of the high-temperature drying chamber (320) and the cold fluid outlet (312); The low-grade energy exchanged heat with the dry gas in the second generator (330).

2. The high-temperature drying and refrigeration system according to claim 1, characterized in that, The gas storage tank (100) also includes: A spring (160) connects the fixed baffle (120) and the second movable baffle (150).

3. The high-temperature drying and refrigeration system according to claim 2, characterized in that, The fixed baffle (120) is provided with a through hole, and the connector (130) passes through the through hole, the diameter of which is larger than that of the connector (130).

4. The high-temperature drying and refrigeration system according to claim 3, characterized in that, The first valve (171) is used to connect the refrigeration system (200) and the first upper cavity (113); The second valve (172) is used to connect the refrigeration system (200) and the first upper cavity (113); The third valve (173) is used to connect the high-temperature drying system (300) and the second lower cavity (116); The fourth valve (174) is used to connect the high-temperature drying system (300) and the second lower cavity (116).

5. The high-temperature drying and refrigeration system according to claim 1, characterized in that, The low-grade energy source is a low-grade heat source with a temperature of 60℃-100℃.

6. The high-temperature drying and refrigeration system according to claim 5, characterized in that, The high-temperature drying and refrigeration system includes multiple gas storage tanks (100), and the refrigeration system (200) and the high-temperature drying system (300) are connected in parallel with the multiple gas storage tanks (100).

7. A control method for a high-temperature drying and refrigeration system driven by low-grade energy, characterized in that, The control method is used to control the high-temperature drying and refrigeration system as described in claim 1, and the control method for each of the plurality of gas storage tanks (100) includes: First operating state: Close the first valve (171), the second valve (172) and the third valve (173), open the fourth valve (174), and fill the second lower cavity (116) with the dry gas; Second operating state: When the second lower cavity (116) is filled with the dry gas, the first valve (171), the third valve (173) and the fourth valve (174) are closed, and the second valve (172) is opened. The low-grade energy exchanges heat with the refrigerant in the first generator (270). After the refrigerant heats up, it expands and increases in pressure. The first upper cavity (113) is filled with the refrigerant. The first movable baffle (140) is pushed by the refrigerant, so that the second movable baffle (150) pressurizes the dry gas in the second lower cavity (116). Third operating state: Close the first valve (171) and the fourth valve (174), open the second valve (172) and the third valve (173), and the high-temperature drying system (300) starts heating cycle; Fourth operating state: When the second movable baffle (150) reaches the bottom of the second lower cavity (116), the second valve (172), the third valve (173) and the fourth valve (174) are closed, the first valve (171) is opened, and the refrigeration system (200) starts the refrigeration cycle.

8. The control method according to claim 7, characterized in that, The control method includes: The multiple gas storage tanks (100) are controlled to be in different operating states so that the refrigeration system (200) and the high-temperature drying system (300) are continuously in a cyclical working state.

Images