Single-flow vortex tube refrigeration system and refrigeration equipment

Abstract

The utility model provides a uniflow vortex tube refrigeration system and refrigeration equipment, and relates to the field of refrigeration equipment, the scheme is that an air compressor is connected with a plurality of uniflow vortex tubes which are connected in series, the air compressor is adopted to compress air, the compressed air enters the N uniflow vortex tubes which are connected in series, and after being processed by the N uniflow vortex tubes which are connected in series, the compressed air enters the N uniflow vortex tubes which are connected in series. According to the arrangement mode that the multiple single-flow vortex tubes are connected in series, hot airflow can be eliminated, the cold airflow flow can be increased, the refrigerating capacity can be increased, the system control scheme is simple, the influence of the hot airflow of the vortex tubes under the conventional condition does not need to be considered, and the refrigerating capacity can be increased through multiple times of series connection.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration equipment technical field, concretely relates to a single -flow vortex tube refrigeration system and refrigeration plant. BACKGROUND

[0002] Under the background of actively promoting energy saving and emission reduction in the current global range, the refrigeration industry attaches unprecedented importance to the environmental performance of refrigerants. Traditional refrigeration systems often rely on chemical refrigerants, which may have adverse effects on the environment during production, use and disposal, such as exacerbating the greenhouse effect or destroying the ozone layer. Therefore, finding and developing environmentally friendly refrigeration technology and materials has become a hot spot in the industry.

[0003] Vortex tube technology, as an innovative refrigeration method, is unique in that it can directly use air as the working medium for refrigeration without the need for additional heat exchanger equipment. This feature not only simplifies the structure of the system, reduces manufacturing costs and maintenance complexity, but also reduces the dependence on specific refrigerants because it directly uses ambient air, thereby improving overall environmental performance. In addition, vortex tubes can provide fresh air (fresh air) while refrigerating, which is also of great significance to improving indoor air quality and promoting human health.

[0004] However, although vortex tube technology has great potential in environmental performance and application flexibility, its current technical development still faces some challenges. One major problem is that the cold air flow rate is relatively low. This means that in applications requiring large-scale refrigeration, vortex tubes may not be able to meet the high-efficiency refrigeration requirements, limiting their widespread application in certain fields. On the other hand, the hot air generated by the vortex tube during the refrigeration process may inhibit the refrigeration effect to some extent, i.e. the influence of hot air will reduce the effective utilization efficiency of cold air, which is also a technical problem that needs to be solved urgently.

[0005] To solve these problems, researchers are working to optimize the design parameters of vortex tubes, such as adjusting the shape, size of the air flow channel and the structure of the vortex generator, in order to improve the efficiency of cold air flow generation and refrigeration performance. At the same time, efforts are being made to explore how to more effectively manage hot air through advanced control strategies to reduce its negative impact on refrigeration efficiency. These efforts aim to further improve the refrigeration efficiency of vortex tubes, broaden their application range, and make them a more reliable and efficient environmentally friendly refrigeration solution in the future refrigeration industry. SUMMARY

[0006] Therefore, the utility model embodiment provides a single -flow vortex tube refrigeration system and refrigeration plant to realize the improvement of refrigerating capacity.

[0007] To achieve the above purpose, the utility model embodiment provides the following technical scheme:

[0008] A single-flow vortex tube refrigeration system, comprising:

[0009] an air compressor 10, a pressure regulating valve 20, and N single-flow vortex tubes 30, where N is a positive integer not less than 2;

[0010] the N single-flow vortex tubes 30 are connected in series, where the inlet of a single-flow vortex tube 30 at a higher level is connected to the cold end outlet of a single-flow vortex tube 30 at a lower level, and the cold end outlet of the last single-flow vortex tube 30 in the series of N single-flow vortex tubes 30 is the gas outlet of the single-flow vortex tube refrigeration system;

[0011] the gas outlet of the air compressor 10 is connected to the inlet of the first single-flow vortex tube 30 in the series of N single-flow vortex tubes 30;

[0012] the pressure regulating valve 20 is arranged between the gas outlet of the air compressor 10 and the inlet of the first single-flow vortex tube 30.

[0013] Optionally, the single-flow vortex tube refrigeration system further comprises:

[0014] a temperature sensor and / or a pressure sensor arranged at the cold end outlet of each single-flow vortex tube 30.

[0015] Optionally, the single-flow vortex tube refrigeration system further comprises a flow regulating valve arranged between two adjacent single-flow vortex tubes 30.

[0016] Optionally, the single-flow vortex tube refrigeration system further comprises:

[0017] the single-flow vortex tube refrigeration system has N gas outlets, each of which corresponds to the cold end outlet of a single-flow vortex tube 30;

[0018] wherein the cold end outlet of a target single-flow vortex tube 30 is connected to a corresponding gas outlet through a flow regulating valve;

[0019] the target single-flow vortex tube 30 is other than the last single-flow vortex tube 30 in the series of N single-flow vortex tubes 30.

[0020] Optionally, in the single-flow vortex tube refrigeration system, the flow regulating valve is an electronic expansion valve.

[0021] Optionally, the single-flow vortex tube refrigeration system further comprises:

[0022] a regulating valve controller, an output end of the regulating valve controller being connected to a control end of the flow regulating valve, the regulating valve controller being configured to provide a control signal to the flow regulating valve for controlling the opening degree of the flow regulating valve.

[0023] Optionally, the single-flow vortex tube refrigeration system further comprises:

[0024] a bypass branch, a first end of the bypass branch being connected with the cold end outlet of the upstream single-flow vortex tube 30 of the two adjacent single-flow vortex tubes 30, and a second end of the bypass branch being connected with the cold end outlet of the downstream single-flow vortex tube 30 of the two adjacent single-flow vortex tubes 30.

[0025] Optionally, the single-flow vortex tube refrigeration system further comprises:

[0026] two flow regulating valves are arranged between the two adjacent single-flow vortex tubes 30, and the second end of the bypass branch is connected between the two flow regulating valves.

[0027] A refrigeration device comprising the single-flow vortex tube refrigeration system.

[0028] Optionally, the refrigeration device is an industrial cooling device, a cabinet cooler, a case cooler, a tool cooling device or an ultrasonic welding cooler.

[0029] Based on the above technical solution, the above scheme provided by the embodiment of the present application is that the air compressor 10 is connected with multiple single-flow vortex tubes 30 in series, the air compressor 10 is used to compress air, the compressed air enters the N single-flow vortex tubes 30 in series, and the cold air is output from the cold end outlet of the last single-flow vortex tube 30 after being processed by the N single-flow vortex tubes 30 in series. The arrangement mode of the multiple single-flow vortex tubes 30 in series can eliminate hot air flow, improve cold air flow, increase refrigerating capacity, and the system control scheme is simple, without considering the influence of the vortex tube hot air flow under normal conditions, and the refrigerating capacity can be improved by multiple series connection. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0031] Figure 1 A structural schematic view of the single-flow vortex tube disclosed in the embodiments of the present application;

[0032] Figure 2 A structural schematic view of the single-flow vortex tube refrigeration system disclosed in the embodiments of the present application;

[0033] Figure 3A single-flow vortex tube working principle schematic diagram disclosed by an embodiment of the present application;

[0034] Figure 4 A single-flow vortex tube refrigeration system structure schematic diagram disclosed by another embodiment of the present application;

[0035] Figure 5 A single-flow vortex tube refrigeration system structure schematic diagram disclosed by another embodiment of the present application;

[0036] Figure 6 A single-flow vortex tube refrigeration system structure schematic diagram disclosed by another embodiment of the present application;

[0037] Figure 7 A single-flow vortex tube refrigeration system structure schematic diagram disclosed by another embodiment of the present application. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0039] The single-flow vortex tube in the present scheme is a vortex tube that can only output cold air. The single-flow vortex tube that only outputs cold air actually refers to that cold air is generated at one end of the vortex tube, and hot air or other state gas can be generated at the other end. In the present scheme, the type of the single-flow vortex tube can be selected according to design requirements. For example, the single-flow vortex tube can be a conventional vortex tube (DVT), a counterflow vortex tube, a vortex tube with additional gas (DVTS), a vortex tube with a liquid outlet (TVT), a cooling vortex tube (CVT), and a self-bleeding vortex tube (SVT).

[0040] Referring to Figure 1 , the single-flow vortex tube mainly comprises an inlet, a vortex chamber, a cold-end pipe, and a hot-end pipe, and the cold-end outlet is arranged on the cold-end pipe. The single-flow vortex tube is a mechanical device that can separate hot air flow and cold air flow from a single compressed air source. The working principle of the single-flow vortex tube is based on the principles of fluid dynamics and thermodynamics, especially the Bernoulli principle and the conservation of angular momentum. When high-pressure, high-speed compressed air enters the vortex chamber of the vortex tube through the inlet, the airflow starts to rotate at high speed in a spiral mode, forms a vortex, and is discharged from the cold-end pipe. Due to the conservation of angular momentum, the gas close to the center loses the radial velocity component and moves axially to the center, forming a cold gas flow. At the same time, the peripheral gas has a reduced axial velocity and is pushed to the outer wall, forming a hot gas flow. The spatial separation of gases with different speeds leads to the formation of a temperature gradient.

[0041] Single flow vortex tube is selected after further exploration on the basis of vortex tube and determination of the superiority of single flow vortex tube. The advantage of single flow vortex tube mainly lies in that it not only has the advantages of small volume, light weight, low cost, safety and reliability, wide pressure and flow range, etc. of vortex tube, but also has only one end outlet, eliminates the influence of hot gas flow and improves the cold gas flow. At the same time, the single flow vortex tube is simple in series connection, and the refrigerating capacity of the refrigerating system with multiple series connection of single flow vortex tubes can be greatly improved.

[0042] As can be seen, the single flow vortex tube only needs to pass in compressed air to generate cold and hot air inside it. The single flow vortex tube discards the hot end outlet, and the cold gas flow is completely discharged from the cold end tube to generate cold capacity. Compared with the hot gas flow discharged from the hot end tube of the conventional vortex tube, the single flow vortex tube only has a cold end outlet for cold air during refrigeration, which can eliminate the adverse effects of hot gas flow on refrigeration, thereby improving the cold end air flow of the vortex tube, and multiple series connection of single flow vortex tubes can improve the refrigerating capacity.

[0043] Referring to Figure 2 The single flow vortex tube refrigerating system disclosed in the embodiments of the present application can include:

[0044] An air compressor 10, a pressure regulating valve 20 and N single flow vortex tubes 30, wherein N is a positive integer not less than 2;

[0045] Regarding the air compressor 10, when selecting the air compressor 10, the single flow vortex tube refrigerating system mainly considers the type, exhaust capacity, working pressure and whether it contains oil and other characteristics of the air compressor 10. In the present scheme, the air compressor 10 can be an oil-free air compressor or a volumetric air compressor (such as a piston air compressor or a screw air compressor).

[0046] The N single flow vortex tubes 3030 are connected in series, wherein the inlet of the upper single flow vortex tube 30 in the series connection is connected with the cold end outlet of the lower single flow vortex tube 30, and the cold end outlet of the last single flow vortex tube 30 in the series connection of the N single flow vortex tubes 30 serves as the gas outlet of the single flow vortex tube refrigerating system, which is connected in communication with the target area for providing cold air to the target system;

[0047] The pressure regulating valve 20 is arranged between the gas outlet of the air compressor 10 and the inlet of the first single flow vortex tube 30.

[0048] The gas outlet of the air compressor 10 is connected with the inlet of the first single flow vortex tube 30 in the series connection of the N single flow vortex tubes 30, and the air compressed by the air compressor 10 enters the first single flow vortex tube 30 through the gas outlet of the air compressor 10, referring to Figure 3, compressed air into single flow vortex tube 30, in the vortex chamber to do three-dimensional high-speed rotation, along the hot end tube to form the outer hot gas flow and inner cold gas flow, due to the mutual friction between gas molecules, vortex flow at the pipe wall driven pipe inside the core of the inner layer of the gas flow together with the rotation, so that the vortex tube formed two counter-flow, it is because the interaction of the two counter-flow, the core of the inner layer of the fluid has the kinetic energy to the fluid at the pipe wall, so the outer gas due to the acquisition of kinetic energy, so the temperature rises, the inner fluid lost kinetic energy, temperature decreases, the inner cold gas flow from the cold end outlet of the first single flow vortex tube 30, into the next single flow vortex tube 30, until the single flow vortex tube refrigeration system output, by setting multi-stage single flow vortex tube 30 series to enhance the refrigeration capacity.

[0049] The single flow vortex tube 30 can provide cold air alone, the principle is as follows:

[0050] Air flow rotation and separation:

[0051] When the compressed air is injected into the vortex chamber of the single flow vortex tube 30, the air flow rotates at a very high speed (up to one million revolutions per minute) to the hot gas end outlet of the vortex tube.

[0052] In the process of rotation, due to the existence of angular momentum and the friction effect between layers, the air flow is separated into two parts: the inner layer of gas flow and the outer layer of gas flow.

[0053] Energy transfer and temperature change:

[0054] The inner layer of gas flow due to the rotation of the angular velocity, and the outer layer of gas flow friction, will energy to the outer layer of gas flow, resulting in its own energy weakening, speed slowing down, temperature decreasing.

[0055] The outer layer of gas flow not only obtains the energy of the inner layer of gas flow, but also rubs with the vortex tube wall, so that the temperature continues to rise and the speed increases.

[0056] Cold and hot gas flow separation:

[0057] The inner layer of gas flow with low center temperature is blocked by the vortex baffle or separation hole plate provided in the single flow vortex tube 30 when advancing with the outer layer of hot gas flow, and then rebounds to change direction, so that the low-temperature gas flow flows out from the cold gas end of the vortex tube.

[0058] The outer layer of high-temperature gas flow flows out from the hot gas end of the vortex tube, thereby realizing the separation of cold and hot gas flow.

[0059] The single-flow vortex tube refrigeration system disclosed in the above embodiments of the present application first uses an air compressor 10 to compress air, and the compressed air enters a series of N single-flow vortex tubes 30. After being processed by the series of N single-flow vortex tubes 30, cold air is output from the cold end outlet of the last single-flow vortex tube 30. This arrangement of multiple single-flow vortex tubes 30 in series can eliminate hot gas flow, increase cold gas flow, and increase refrigeration capacity. The system control scheme is simple, and there is no need to consider the influence of vortex tube hot gas flow under normal conditions. Multiple series can be used to increase refrigeration capacity.

[0060] Referring to Figure 4 In the present embodiment, the system can further include a temperature sensor and / or a pressure sensor, which is arranged at the cold end outlet of each single-flow vortex tube 30, for measuring the temperature and / or pressure of the gas flow output from the cold end outlet of each single-flow vortex tube 30.

[0061] By arranging a temperature sensor, the following functions can be achieved:

[0062] Monitoring temperature changes:

[0063] The temperature sensor can monitor the temperature changes at the cold end outlet in real time. This is crucial for understanding the refrigeration effect of the single-flow vortex tube 30 and maintaining the stability of the output temperature.

[0064] Feedback regulation:

[0065] By feeding back the temperature data to the control system, the temperature sensor can help achieve automatic regulation of the refrigeration effect of the single-flow vortex tube 30. When the temperature deviates from the set value, the control system can adjust the working state of the single-flow vortex tube 30 or the working state of the air compressor 10 according to the feedback of the temperature sensor, so as to maintain the constant output temperature.

[0066] Optimizing performance:

[0067] The temperature sensor can also be used to evaluate the performance of the single-flow vortex tube 30. By monitoring the temperature data, key indicators such as refrigeration efficiency, stability, and reliability of the single-flow vortex tube 30 can be analyzed, and the single-flow vortex tube 30 can be optimized and improved.

[0068] By arranging a pressure sensor, the following functions can be achieved:

[0069] Measuring pressure changes:

[0070] The pressure sensor is used to measure the pressure changes at the cold end outlet of the single-flow vortex tube 30. This is important for understanding the pressure distribution of the fluid inside the single-flow vortex tube 30 and evaluating the performance of the single-flow vortex tube 30.

[0071] Monitoring safety:

[0072] By monitoring the pressure data, potential pressure abnormalities or safety hazards within the single-flow vortex tube 30 can be detected in a timely manner. When the pressure exceeds the set value, the control system can automatically take measures to protect the single-flow vortex tube 30 from being damaged due to excessive pressure.

[0073] Auxiliary control:

[0074] The pressure sensor can also be used in conjunction with other sensors such as temperature sensors to achieve precise control of the single-flow vortex tube 30. By analyzing temperature and pressure data comprehensively, the working state of the single-flow vortex tube 30 can be more accurately understood, and corresponding adjustments and optimizations can be made accordingly.

[0075] For example, the user can detect the outlet temperature and flow rate of the single-flow vortex tube 30 through the temperature sensor and pressure sensor at the cold end outlet of the single-flow vortex tube 30. When the temperature or flow rate does not meet the requirements, the user can adjust the output power of the air compressor 10 to ensure that the temperature and flow rate at the cold end outlet of the single-flow vortex tube 30 meet the requirements.

[0076] Referring to Figure 2 In this embodiment, a flow regulating valve X can also be provided between two adjacent single-flow vortex tubes 30, i.e., the flow regulating valve X is provided on the pipeline between the cold end outlet of the upstream single-flow vortex tube 30 and the inlet of the downstream single-flow vortex tube 30, for regulating the air flow in this section of pipeline. For example, by adjusting the opening angle of the flow regulating valve, the air flow into the next single-flow vortex tube 30 can be adjusted, and even the downstream single-flow vortex tube 30 can be stopped and shut off, so that no air enters the inlet of the single-flow vortex tube 30.

[0077] For example, the user can determine whether the temperature of the air flow output from the cold end outlet meets the requirements through the temperature sensor. If it does not meet the requirements, the temperature of the air flow output from the cold end outlet can be adjusted by increasing the conduction angle of the flow regulating valve between the two single-flow vortex tubes 30. When the conduction angle of the flow regulating valve is adjusted to the maximum, the temperature of the air flow output from the cold end outlet still does not meet the requirements, at which point the output power of the air compressor 10 can be increased to increase the inlet pressure of the single-flow vortex tube 30, and the temperature of the air flow output from the cold end outlet can be adjusted.

[0078] Alternatively, the output power of the air compressor 10 can be increased first to increase the inlet pressure of the single-flow vortex tube 30. If the temperature of the air flow output from the cold end outlet still does not meet the requirements after increasing the output power of the air compressor 10, the opening of the flow regulating valve between the two single-flow vortex tubes 30 can be increased again.

[0079] Referring to Figure 5In the embodiment, the single-flow vortex tube refrigeration system can have N gas outlets, each corresponding to the cold end outlet of a single-flow vortex tube 30, and the N gas outlets can be connected to a total gas outlet to provide cold air to a target area. In this design, the N single-flow vortex tubes 30 can work partially, wherein the cold end outlet of a target single-flow vortex tube 30 is connected to a corresponding gas outlet through a flow regulating valve X.

[0080] In the embodiment, the flow regulating valve between two single-flow vortex tubes 30 is referred to as a first flow regulating valve, and the flow regulating valve between the single-flow vortex tube 30 and the gas outlet is referred to as a second flow regulating valve. At this time, the user can operate the single-flow vortex tube refrigeration system through the following process:

[0081] First, the second flow regulating valve corresponding to the first single-flow vortex tube 30 is in an open state, and the other flow regulating valves are in a closed state. After the compressed air output by the air compressor 10 enters the first single-flow vortex tube 30, the cold air output by the cold end outlet of the first single-flow vortex tube 30 is output through the corresponding gas outlet. When the temperature of the airflow at the cold end outlet of the first single-flow vortex tube 30 meets the requirements, the current state is maintained. When the temperature of the airflow at the cold end outlet of the first single-flow vortex tube 30 does not meet the requirements, the output power of the air compressor 10 can be increased, or the first flow regulating valve between the first single-flow vortex tube 30 and the second single-flow vortex tube 30 can be controlled to open, the second flow regulating valve corresponding to the second single-flow vortex tube 30 can be controlled to open, and the second flow regulating valve corresponding to the first single-flow vortex tube 30 can be controlled to close. At this time, the cold end outlet of the first single-flow vortex tube 30 no longer has cold air flowing out, and the cold end outlet of the second single-flow vortex tube 30 has cold air flowing out. Compared with the mode of adjusting only through the first single-flow vortex tube 30, the compressed air output by the air compressor 10 can have a lower temperature after being adjusted by the first single-flow vortex tube 30 and the second single-flow vortex tube 30. If the temperature of the cold air at the cold end outlet of the second single-flow vortex tube 30 still does not meet the requirements, the first flow regulating valve between the second single-flow vortex tube 30 and the third single-flow vortex tube 30 can be controlled to open, the second flow regulating valve corresponding to the third single-flow vortex tube 30 can be controlled to open, and the second flow regulating valve corresponding to the second single-flow vortex tube 30 can be controlled to close. If the temperature of the cold air at the cold end outlet of the third single-flow vortex tube 30 still does not meet the requirements, the above steps can be continuously performed until the second flow regulating valve corresponding to the last single-flow vortex tube 30 in the series connection of the N single-flow vortex tubes 30 is opened. In this scheme, 3-5 single-flow vortex tubes 30 can be provided, i.e., 3-5 single-flow vortex tubes 30 are connected in series, and the 3-5 single-flow vortex tubes 30 can meet the requirements of most scenarios.

[0082] In this embodiment, the flow regulating valve is an electronic expansion valve. Electronic expansion valves, also known as electronic throttling devices, are a key component commonly used in modern refrigeration systems. Compared to traditional thermal expansion valves, electronic expansion valves directly control the flow of refrigerant through a stepper motor or solenoid valve. The working principle is roughly as follows: according to the preset program or signals from temperature, pressure, etc. sensors, the controller sends instructions to the electronic expansion valve to adjust its opening, thereby precisely controlling the flow of refrigerant. The design of electronic expansion valves is to achieve precise and rapid adjustment of refrigerant flow. This adjustment function is crucial to improve the efficiency, stability and response speed of the refrigeration system. For example, when the load changes, the electronic expansion valve can quickly adjust the refrigerant flow to ensure that the system always operates in the best state.

[0083] In this embodiment, a regulating valve controller can be configured, the output end of the regulating valve controller being connected with the control end of the flow regulating valve, and the regulating valve controller being configured to provide a control signal for controlling the opening of the flow regulating valve to the flow regulating valve. The regulating valve controller can determine whether the cold air temperature at the cold end outlet of the single-flow vortex tube 30 meets the requirements based on the comparison result of the target temperature and the temperature collected by the temperature sensor, and control the on-off state of each flow regulating valve based on the above logic if the requirements are not met.

[0084] In this embodiment, considering that the single-flow vortex tube 30 may have some faults after long-term use, for example, long-term use in high temperature, high pressure or corrosive environment, oxidation or corrosion may occur inside the vortex tube, causing damage to the tube body. There are a lot of dust, impurities or moisture in the air, which may cause the vortex tube to be blocked or internally contaminated, affecting its performance. During use, if the distance between the eddy current probe and the detected object is too close or too far, it may cause abnormal electric field signals, thereby damaging the vortex tube. Long-term or overloading use of the vortex tube may accelerate its wear and aging, causing performance degradation or damage. There is a certain gap between the inner wall of the vortex tube and the probe, which may cause wear, burr and other problems after long-term use, causing the performance of the vortex tube to decrease. As the use time increases, the interface of the vortex tube may leak due to loosening or aging, affecting its normal work. If the inlet pressure of compressed air is low or the flow is insufficient (the standard pressure of the vortex tube is usually 6.9 Bar), it may cause low refrigeration effect. If the inner diameter of the compressed air pipeline is not large enough, it may cause small supply flow, affecting the performance of the vortex tube. When a single-flow vortex tube 30 is damaged and its cold end outlet cannot output airflow, it will cause the subsequent single-flow vortex tube 30 to be unable to continue to be used. For this situation, see Figure 6In this embodiment, a bypass branch can also be configured, with the first end connected to the cold end outlet of the upstream single-flow vortex tube 30 among the two adjacent single-flow vortex tubes 30, and the second end connected to the cold end outlet of the downstream single-flow vortex tube 30 among the two adjacent single-flow vortex tubes 30. When the downstream single-flow vortex tube 30 fails, the bypass branch can be opened, and at this time, the gas flow that should flow into the downstream single-flow vortex tube 30 flows into the next single-flow vortex tube through the bypass branch. At this time, the next single-flow vortex tube replaces the failed single-flow vortex tube under the control of the regulating valve controller.

[0085] In this embodiment, when the bypass branch is opened, in order to prevent the gas flow flowing out of the bypass branch from flowing back into the failed single-flow vortex tube 30, see Figure 7 In this scheme, two flow regulating valves can be arranged between the two adjacent single-flow vortex tubes 30, and the second end of the bypass branch is connected between the two flow regulating valves. The flow regulating valve close to the failed single-flow vortex tube 30 among the two flow regulating valves is kept in a closed state, thereby preventing the gas flow flowing out of the bypass branch from flowing back into the failed single-flow vortex tube 30.

[0086] Corresponding to the above-mentioned system, the application also discloses a refrigeration equipment. The single-flow vortex tube 30 is a kind of high-efficiency heat exchange equipment, and its refrigeration function is widely used in various equipment. Therefore, the refrigeration equipment using the above-mentioned single-flow vortex tube refrigeration system is also within the protection scope of the application, and these equipment can include:

[0087] Industrial cooling equipment:

[0088] In the industrial field, the single-flow vortex tube 30 is often used in various devices that require local cooling, such as mechanical equipment, industrial robots, and automated production lines. Through the vortex effect, the single-flow vortex tube 30 can provide rapid and efficient refrigeration effect to ensure the stable operation of the equipment.

[0089] Case cooler:

[0090] Because a large amount of heat is generated inside the case due to the operation of various electronic components, a cooling device is needed to maintain the temperature stability inside the case. The single-flow vortex tube 30 becomes an ideal choice for case coolers due to its refrigeration effect.

[0091] Cabinet cooler:

[0092] Similar to the case, the temperature inside the cabinet also needs to be kept stable to ensure the normal operation of the internal equipment. The single-flow vortex tube 30 can be used for cabinet cooling to reduce the temperature inside the cabinet through refrigeration.

[0093] Tool cooling equipment:

[0094] In the field of metal processing, the tool will generate a large amount of heat when running at high speed, which may affect the life and processing accuracy of the tool. Therefore, it is necessary to use cooling equipment to cool the tool. The single-flow vortex tube 30 can be made into a tool cooling gun to provide fast and efficient refrigeration effect for the tool.

[0095] Ultrasonic welding cooler:

[0096] In the ultrasonic welding process, a large amount of heat is generated in the welding area, which may affect the welding quality and efficiency. Therefore, it is necessary to use cooling equipment to cool the welding area. The single-flow vortex tube 30 can be made into an ultrasonic welding cooler to provide the necessary refrigeration effect for the welding process.

[0097] For the convenience of description, the above system is described in various modules according to functions. Of course, the functions of each module can be realized in the same or multiple software and / or hardware when implementing the present application.

[0098] Each embodiment in the specification is described in a progressive manner, and the same and similar parts of each embodiment can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0099] It should also be noted that in this document, relationship terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0100] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A single-flow scroll refrigeration system characterized by, The single-flow vortex tube refrigeration system comprises: an air compressor, a pressure regulating valve, and N single-flow vortex tubes, wherein N is a positive integer not less than 2; the N single-flow vortex tubes are connected in series, wherein the inlet of an upstream single-flow vortex tube is connected to the cold end outlet of a downstream single-flow vortex tube, and the cold end outlet of the last single-flow vortex tube in the series of N single-flow vortex tubes is the outlet of the single-flow vortex tube refrigeration system; the outlet of the air compressor is connected to the inlet of the first single-flow vortex tube in the series of N single-flow vortex tubes; the pressure regulating valve is arranged between the outlet of the air compressor and the inlet of the first single-flow vortex tube.

2. The single-flowery tube refrigeration system according to claim 1, characterized in that, Further comprising: a temperature sensor and / or a pressure sensor arranged at the cold end outlet of each single-flow vortex tube.

3. The single-flowery tube refrigeration system according to claim 1, characterized in that, Further comprising: a flow regulating valve arranged between two adjacent single-flow vortex tubes.

4. The single-flowery tube refrigeration system of claim 1, wherein, Further comprising: the single-flow vortex tube refrigeration system has N outlets, each of which corresponds to the cold end outlet of a single-flow vortex tube; wherein the cold end outlet of a target single-flow vortex tube is connected to a corresponding outlet through a flow regulating valve; the target single-flow vortex tube is any single-flow vortex tube other than the last single-flow vortex tube in the series of N single-flow vortex tubes.

5. The single-flowery tube refrigeration system according to claim 4, characterized in that, The flow regulating valve is an electronic expansion valve.

6. The single-flowery tube refrigeration system according to claim 4, wherein, Further comprising: a regulating valve controller, wherein the output of the regulating valve controller is connected to the control end of the flow regulating valve, and the regulating valve controller is configured to provide a control signal to the flow regulating valve to control the opening degree of the flow regulating valve.

7. The single-flow vortex tube refrigeration system according to claim 1, characterized in that: Further comprising: a bypass branch, wherein the first end of the bypass branch is connected to the cold end outlet of an upstream single-flow vortex tube among two adjacent single-flow vortex tubes, and the second end of the bypass branch is connected to the cold end outlet of a downstream single-flow vortex tube among the two adjacent single-flow vortex tubes.

8. The single-flowery tube refrigeration system according to claim 7, characterized in that, Further comprising: two flow regulating valves arranged between two adjacent single-flow vortex tubes, wherein the second end of the bypass branch is connected between the two flow regulating valves.

9. A refrigeration appliance characterized in that, The single-flow vortex tube refrigeration system according to any one of claims 1-8.

10. The refrigeration appliance of claim 9, wherein, The refrigeration device is an industrial cooling device, a cabinet cooler, a case cooler, a tool cooling device, or an ultrasonic welding cooler.

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