Air curtain system and control method and control device of air curtain system

Abstract

The invention relates to the technical field of ventilation and air conditioning of nuclear power plants, in particular to an air curtain system, a control method and a control device of the air curtain system, and the air curtain system comprises a compressed air connection unit (10), a fan air supply unit (20), a nozzle unit (30) and a control unit (40), and the control unit (40) is used for controlling the compressed air connection unit (10) to provide compressed air for the nozzle unit (30), or controlling the fan air supply unit (20) to supply air to the nozzle unit (30), so that the nozzle unit (30) jets airflow and forms an air curtain. The air curtain system provided by the invention has relatively high use reliability, and can meet the use requirements in special scenes such as nuclear power plant reactor accident conditions and the like.

Description

Technical Field

[0001] The present application relates to the technical field of ventilation and air conditioning in nuclear power plants, and in particular to an air curtain system, a control method for the air curtain system, and a control device. Background Art

[0002] In the event of a nuclear power plant reactor accident, airborne radioactive pollutants will overflow into the plant environment through various channels. Nuclear power plants have set up emergency sites such as the main control room and emergency center, which are used as accommodation for accident handling personnel in the event of a radioactive air pollution accident.

[0003] The boundary doors used for personnel to enter and exit these emergency sites are usually airtight doors, semi-airtight doors or non-airtight doors. When the doors are closed, they have a certain isolation effect and can reduce the exchange of air in the emergency site with external radioactive contaminated air in the event of an accident. However, the habitability survey of these boundary doors found that no matter what type of boundary door, there will still be a certain degree of static sealing and dynamic sealing problems.

[0004] Air curtain is a form of local air supply. It uses a specific device to spray air jets to form an air curtain of a certain thickness. The pressure difference between the inside and outside of the air curtain can prevent the flow of gas across the flow surface, thereby effectively reducing the mass, composition and energy exchange in the areas on both sides of the air curtain. According to the working principle of the air curtain, the use of an air curtain device can easily achieve the dynamic and static sealing problems of the boundary door at a low cost.

[0005] Air curtains have a large number of applications in industry and commerce, and there are various standardized products. However, the current various air curtain products have poor reliability, and their functions are difficult to meet the use requirements under the reactor accident conditions of nuclear power plants. Therefore, providing an air curtain product with higher reliability for use in nuclear emergency situations has become a technical problem to be solved. Summary of the invention

[0006] The embodiments of the present application provide an air curtain system, a control method and a control device for the air curtain system. The air curtain system has high reliability and can meet the use requirements in special scenarios such as nuclear power plant reactor accident conditions.

[0007] In a first aspect, an air curtain system is provided, comprising a compressed air connection unit, a fan air supply unit, a nozzle unit and a control unit, wherein the control unit is used to control the compressed air connection unit to provide compressed air to the nozzle unit, or to control the fan air supply unit to supply air to the nozzle unit, so that the nozzle unit sprays airflow and forms an air curtain.

[0008] The air curtain system provided by the present application has two power air sources, namely a compressed air connection unit and a fan air supply unit. The control unit can control the compressed air connection unit to provide compressed air to the nozzle unit to form an air curtain, or control the fan air supply unit to supply air to the nozzle unit to form an air curtain. The present application integrates these two power air sources together, and the nozzle unit can be connected and used as needed. The compressed air supply and the fan air supply are backup for each other, and the switching is convenient, thereby greatly improving the reliability of the system, which is particularly important for application in nuclear power plant accident emergency sites.

[0009] For example, when the main power is lost, the motor fails and there is a compressed air supply, the compressed air supply circuit can be switched manually or automatically to maintain the existence of the air curtain. Similarly, after the compressed air supply is lost, and there is power, the fan can be turned on manually or automatically to maintain the existence of the air curtain.

[0010] Since the compressed air power source and the power supply have different properties, the probability of losing these two types of power sources at the same time is very small. Therefore, the reliability of the air curtain system provided in this application is very high and can meet the use requirements in special scenarios such as nuclear power plant reactor accidents. The reliability and habitability of emergency places such as the main control room are improved, and ultimately the inherent safety of the nuclear power plant is improved.

[0011] In a possible design, the air curtain system further includes a temperature regulating unit, which is used to regulate the temperature of the compressed air from the compressed air connection unit before transmitting the compressed air to the nozzle unit.

[0012] Through the above arrangement, the nozzle unit can be provided with an air source with a suitable temperature, that is, the temperature of the air curtain can be adjusted, and the comfort of personnel passing through the air curtain can be improved. In addition, the air curtain with a suitable temperature can also adjust the temperature in the emergency place, play an air conditioning effect, and thus improve the habitability of the emergency place. As a result, the air curtain system provided by the present application can meet the use requirements in more scenarios.

[0013] In a possible design, the air curtain system also includes a constant temperature pipe arranged in parallel with the air temperature regulating unit, and the control unit is used to control the compressed air from the compressed air connection unit to be transmitted to the nozzle unit through the air temperature regulating unit or the constant temperature pipe.

[0014] Through the above settings, under the control of the control unit, the compressed air from the compressed air connection unit can be directly transmitted to the nozzle unit through the normal temperature pipe (that is, the compressed air does not need to be temperature-regulated); it can also be transmitted to the nozzle unit after being temperature-regulated by the temperature regulating unit; or part of the compressed air is directly transmitted to the nozzle unit through the normal temperature pipe, and the other part is transmitted to the nozzle unit after being temperature-regulated by the temperature regulating unit. This makes the use of the air curtain system provided by the present application more flexible and can meet the use requirements in more scenarios.

[0015] In a possible design, the air temperature regulating unit includes a vortex tube, which includes an air inlet, a cold air outlet and a hot air outlet, and the air inlet is connected to the compressed air connecting unit; the control unit is used to control the air temperature regulating unit so that the cold air outlet transmits cooled compressed air to the nozzle unit, or the hot air outlet transmits heated compressed air to the nozzle unit.

[0016] The main body of the air temperature regulating unit provided in the present application is a vortex tube, which is a device with a simple and compact structure that can separate high-pressure gas into two low-pressure airflows of high temperature and low temperature at the same time. The air inlet of the vortex tube is connected to the compressed air connection unit. By utilizing the pressure of the compressed air, the vortex tube can output two airflows of different temperatures, hot and cold, without the need to set up other power devices. Under the control of the control unit, the vortex tube can selectively output a cold airflow or a hot airflow to the nozzle unit. Combined with the normal temperature airflow output by the normal temperature tube, the nozzle unit can selectively output three airflows of different temperatures, cold, normal temperature, and hot. This makes the use of the air curtain system provided in the present application more flexible and can meet the use requirements in more scenarios. And due to the simple structure and working characteristics of the vortex tube, the reliability and stability of the entire system are very high.

[0017] In a possible design, the air curtain system further includes a filter unit, the compressed air connection unit and the fan air supply unit are connected to the nozzle unit through the filter unit, and the filter unit includes a nuclear-grade radioactive air filter.

[0018] Through the above arrangement, the airflow from the compressed air connection unit or the fan air supply unit is first filtered through the nuclear-grade radioactive air filter and then transmitted to the nozzle. The radioactive air filter can effectively filter out radioactive pollutants in the airflow, thereby reducing the radiation dose of the staff in the emergency site, improving the reliability and habitability of the emergency site, and ultimately improving the inherent safety of the nuclear power plant.

[0019] In one possible design, the filter unit includes a main filter, a pressure difference sensor and a backup filter; wherein the pressure difference sensor is used to detect the air pressure difference between the front and rear sides of the main filter; and the control unit is used to control the backup filter to replace the main filter for air filtration when the air pressure difference exceeds a preset pressure threshold.

[0020] The filtration unit provided in the present application includes a main filter (for example, it can be a default filter) and a spare filter, which can back up each other and can realize automatic switching. In the event of an accident emergency, the main filter has a high pressure difference and may be blown apart, and the filtering ability will be completely lost. The air curtain will carry radioactive pollutants, causing harm to the entrants and possibly increasing the risk of radioactive pollutants entering the habitable area through the boundary gate. The present application can greatly reduce the risk of the main filter being blown apart by performing pressure difference monitoring, automatic switching and pressure difference alarm on the main filter, and timely replace the filter with a spare filter before the filter is blown apart, effectively preventing the air curtain from carrying radioactive pollutants, and greatly improving the reliability and continuous operation capability of the system.

[0021] In a possible design, the nozzle unit is arranged on the boundary door frame, and the air curtain system also includes a door opening and closing monitoring unit; the control unit is used to control the nozzle unit to spray at a first flow rate when the door opening and closing monitoring unit detects that the boundary door is in an open state; when the door opening and closing monitoring unit detects that the boundary door is in a closed state, control the nozzle unit to spray at a second flow rate, and the first flow rate is greater than the second flow rate.

[0022] The air curtain system provided by the present application also includes a switch door monitoring unit for monitoring the switch state of the boundary door. When the switch door monitoring unit detects that the boundary door is in an open state, the nozzle unit is controlled to spray at a larger flow rate (i.e., the first flow rate), thereby achieving a better sealing and isolating effect. When the switch door monitoring unit detects that the boundary door is in a closed state, at this time, since the boundary door already has a good isolation effect, the control unit can control the nozzle unit to spray at a smaller flow rate (i.e., the second flow rate), thereby achieving the effect of energy saving and consumption reduction.

[0023] In one possible design, the air curtain system also includes an operation status monitoring unit; the control unit is used to control the fan supply unit to supply air to the nozzle unit when the operation status monitoring unit detects that the compressed air connection unit has an operation abnormality; and / or, when the operation status monitoring unit detects that the fan supply unit has an operation abnormality, control the compressed air connection unit to supply compressed air to the nozzle unit.

[0024] Through the above arrangement, automatic switching of the two power air sources, the compressed air connection unit and the fan air supply unit, can be achieved.

[0025] In a second aspect, a control method for an air curtain system is provided, wherein the air curtain system comprises a compressed air connection unit, a fan air supply unit, a nozzle unit and a control unit, wherein the control method is executed by the control unit, and the control method comprises: controlling the compressed air connection unit to provide compressed air to the nozzle unit, or controlling the fan air supply unit to supply air to the nozzle unit, so that the nozzle unit sprays airflow and forms an air curtain.

[0026] In a possible design, the air curtain system also includes a temperature regulating unit, which is used to regulate the temperature of the compressed air from the compressed air connection unit before transmitting it to the nozzle unit; the air curtain system also includes a constant temperature pipe arranged in parallel with the temperature regulating unit; the control method also includes: controlling the compressed air from the compressed air connection unit to be transmitted to the nozzle unit through the temperature regulating unit or the constant temperature pipe.

[0027] In one possible design, the air temperature regulating unit includes a vortex tube, which includes an air inlet, a cold air outlet and a hot air outlet, and the air inlet is connected to the compressed air connection unit; the control method also includes: controlling the air temperature regulating unit so that the cold air outlet transmits cooled compressed air to the nozzle unit, or so that the hot air outlet transmits heated compressed air to the nozzle unit.

[0028] In a possible design, the air curtain system also includes a filter unit, the compressed air connection unit and the fan air supply unit are connected to the nozzle unit through the filter unit, and the filter unit includes a nuclear-grade radioactive air filter; the filter unit includes a main filter, a pressure difference sensor and a backup filter; wherein the pressure difference sensor is used to detect the air pressure difference between the front and rear sides of the main filter; the control method also includes: when the air pressure difference exceeds a preset pressure threshold, controlling the backup filter to replace the main filter for air filtering.

[0029] In a possible design, the nozzle unit is arranged on a boundary door, and the air curtain system further includes a door opening and closing monitoring unit; and the control method further includes:

[0030] When the door opening and closing monitoring unit detects that the boundary door is in an open state, the nozzle unit is controlled to spray at a first flow rate; when the door opening and closing monitoring unit detects that the boundary door is in a closed state, the nozzle unit is controlled to spray at a second flow rate, and the first flow rate is greater than the second flow rate.

[0031] In one possible design, the air curtain system also includes an operation status monitoring unit; the control method also includes: when the operation status monitoring unit detects that the compressed air connection unit has an operation abnormality, controlling the fan air supply unit to supply air to the nozzle unit; and / or, when the operation status monitoring unit detects that the fan air supply unit has an operation abnormality, controlling the compressed air connection unit to supply compressed air to the nozzle unit.

[0032] In a third aspect, a control device for an air curtain is provided, comprising: a processor; a memory; and a computer program, wherein the computer program is stored in the memory, and when the computer program is executed by the processor, the control device executes a control method provided by any possible design in the aforementioned second aspect.

[0033] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is run on a computer, the computer executes the control method provided by any possible design in the aforementioned second aspect.

[0034] In a fifth aspect, a chip system is provided, comprising a processor for calling and running a computer program from a memory, so that an electronic device equipped with the chip system executes a control method provided by any possible design in the aforementioned second aspect.

[0035] In a sixth aspect, a computer program product is provided, the computer program product comprising: a computer program code, when the computer program code is run on a computer, the computer executes the control method provided by any possible design in the aforementioned second aspect.

[0036] It should be noted that the above-mentioned computer program code can be stored in whole or in part on the first storage medium, wherein the first storage medium can be packaged together with the processor or separately from the processor, and this application does not make any specific limitation on this. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure of the air curtain system provided in the embodiment of the present application.

[0038] Figure 2 It is a schematic diagram of the structure of the compressed air connection unit provided in an embodiment of the present application.

[0039] Figure 3 It is a structural schematic diagram of the fan air supply unit provided in an embodiment of the present application.

[0040] Figure 4It is a schematic diagram of the structure of the nozzle unit provided in an embodiment of the present application.

[0041] Figure 5 It is a structural schematic diagram of the temperature adjustment unit provided in the embodiment of the present application.

[0042] Figure 6 Schematic diagram of the structure of the vortex tube provided in the embodiment of the present application.

[0043] Figure 7 It is a schematic diagram of the structure of the filtration unit provided in the embodiment of the present application.

[0044] Figure 8 It is a schematic diagram of the structure of the control unit provided in the embodiment of the present application.

[0045] Fig. 9 It is a structural block diagram of the control device of the air curtain system provided in the embodiment of the present application.

[0046] Reference numerals:

[0047] 10. Compressed air connection unit; 11. Air duct; 12. Connector; 13. Stop valve; 14. Main control valve; 15. Upstream pressure sensor; 16. Downstream pressure sensor;

[0048] 20. Fan air supply unit; 21. Air supply pipe; 22. Fan; 23. Speed ​​sensor; 24. Flow sensor; 25. Control valve; 26. Control switch;

[0049] 30. Nozzle unit; 31. Nozzle; 32. Air duct; 33. Flow regulating valve;

[0050] 40. Control unit; 41. Control module; 42. Signal receiving module; 43. Signal processing module; 44. Alarm module; 45. Power module;

[0051] 50. Temperature adjustment unit; 51. Normal temperature tube; 52. Vortex tube; 520. Shell; 521. Air inlet; 522. Cold air outlet; 523. Hot air outlet; 53. Hot air pipe; 54. Cold air pipe; 55. Hot air discharge pipe; 56. Cold air discharge pipe; 571-576. Control valve; 581-584. Temperature sensor;

[0052] 60. Filter unit; 61. Box; 62. Main filter; 63. Pressure difference sensor; 64-67. Control valve; 68. Spare filter;

[0053] 70. Door opening and closing monitoring unit;

[0054] 80. Control device; 81. Processor; 82. Memory; 821. Computer program; 83. Bus. DETAILED DESCRIPTION

[0055] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0056] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the description of the present application, it should be understood that the terms "upper", "lower", "side", "front", "rear", etc. indicate orientations or positional relationships based on the installation, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0059] With the continuous development of nuclear power technology, serious accidents in nuclear power plants have received widespread attention from nuclear safety authorities of various countries and the International Atomic Energy Agency. All countries have realized that the possibility of serious accidents cannot be completely ruled out. Therefore, nuclear power safety work cannot only consider design basis accidents, but must also consider mitigation and response to serious accidents.

[0060] In the event of a nuclear power plant reactor accident, airborne radioactive pollutants will overflow into the plant environment through various channels. Nuclear power plants have set up emergency sites such as the main control room and emergency center, which are used as residences for accident handling personnel in the event of a radioactive air pollution accident. These sites are equipped with emergency ventilation systems to filter radioactive air pollutants, provide fresh air and regional pressurization to avoid the invasion of polluted air into the area, and ensure that personnel living in these areas can survive under accident conditions, so as to carry out disposal actions in the event of a radioactive accident. In other words, the entire emergency site should ensure that the radiation dose received by personnel meets the relevant requirements, that is, it needs to be habitable.

[0061] The boundary doors used for personnel to enter and exit these emergency sites (the passage doors where the emergency site meets the outside polluted air in the event of an accident) are usually airtight doors, semi-airtight doors or non-airtight doors. When the doors are closed, they have a certain isolation effect and can reduce the exchange of air in the emergency site with external radioactive contaminated air in the event of an accident. However, the habitability survey of these boundary doors found that the following insurmountable shortcomings are currently common and have not been resolved:

[0062] Static sealing problem: After these boundary doors are closed, there are actually certain leakage points and leakage amounts. In a radioactive contamination accident, if the inner side of the boundary door of the emergency site is at positive pressure relative to the outside world, the air in the emergency site will leak outward. If the leakage is too large, it will affect the positive pressure margin in the habitable area. If the inner side of the boundary door of the emergency site is at negative pressure relative to the outside world, the external airborne radioactive contaminated air will leak into the emergency site, causing internal and external radioactive exposure to the internal personnel, increasing the exposure dose of the emergency personnel. Therefore, static leakage of the boundary door objectively exists, and both internal and external leakage are unacceptable. Replacing the boundary door with high sealing performance and improving the maintenance methods of the door are one of the effective means to reduce leakage points and leakage amounts, but the problem cannot be completely solved.

[0063] Dynamic sealing problem: In emergency situations, some emergency personnel need to wear respiratory protection devices and body protection devices to enter and exit the boundary door due to shift changes and work needs. The opening of the boundary door has the following effects on the exchange of internal and external air: 1. During the opening and closing of the boundary door, a certain amount of air will be entrained in the door wake. This entrainment effect can initially pump a certain amount of air out of the emergency facility when the door is opened, causing decompression in the area; then when the door is closed, a certain amount of external contaminated air will be pumped back into the area, causing the entry of radioactive contaminated air. 2. The temperature difference between the air inside and outside the habitable area will affect the degree of air exchange when the door is opened. 3. When people enter and exit, the body shielding area, walking speed and direction will also produce different pumping effects, resulting in different degrees of internal and external air exchange. 4. The length of time the door is open and the opening and closing speed will produce different degrees of internal and external air exchange.

[0064] Air curtain (abbreviated as "air curtain") is a form of local air supply. It uses a specific device to spray air jets to form an air curtain (air barrier) of a certain thickness. The pressure difference between the inside and outside of the air curtain can prevent the flow of gas across the flow surface, thereby effectively reducing the mass, composition and energy exchange in the areas on both sides of the air curtain. According to the working principle of the air curtain, the use of an air curtain device can easily achieve the dynamic and static sealing problems of the boundary door at a low cost.

[0065] Air curtains are widely used in industry and commerce, and there are various standardized products. However, in the emergency situation of nuclear power plant radioactive accidents, the current various air curtain products generally have the following problems:

[0066] (1) The current air curtain products use a single power source and air source, the system reliability is poor, and the special needs in the event of a nuclear power plant accident are not considered, such as simple structure, principle, and working reliability.

[0067] (2) The air source of the air curtain product has not undergone nuclear-grade air purification, making it difficult to prevent the intrusion of nuclear contaminated air into the site and difficult to meet the habitability requirements of the emergency site.

[0068] (3) The ease of operation in the event of an accident is not taken into consideration, and the system does not have the functions of remote operation, monitoring and alarm. In other words, it is impossible to effectively monitor the operation of the air curtain product, make real-time adjustments, and provide failure alarms, and it is impossible to ensure that the air curtain product can continue to operate stably for a long time.

[0069] In summary, the current various types of air curtain products have poor reliability and single functions, which makes it difficult to meet the use requirements under the accident conditions of nuclear power plant reactors. Significantly improving the reliability of products is particularly important for use in accident emergency sites. Therefore, for those skilled in the art, providing an air curtain product with higher reliability for use in nuclear emergency situations to meet the use requirements in special scenarios such as nuclear power plant reactor accident conditions has become a technical problem to be solved.

[0070] Based on this, an embodiment of the present application first provides an air curtain system, which can be used in nuclear power plants. The nozzle unit of the air curtain system can be installed on the boundary door of the emergency site of the nuclear power plant. Under the working conditions of radioactive air pollution accidents, a radioactive filtered air curtain is provided for the boundary door to achieve dynamic and static sealing of the boundary door.

[0071] Figure 1 is a schematic diagram of the structure of the air curtain system provided in the embodiment of the present application, such as Figure 1As shown, the air curtain system provided by the present application includes a compressed air connection unit 10, a fan air supply unit 20, a nozzle unit 30 and a control unit 40. Among them, the control unit 40 is used to control the compressed air connection unit 10 to provide compressed air to the nozzle unit 30 to form an air curtain, or control the fan air supply unit 20 to supply air to the nozzle unit 30 to form an air curtain. That is to say, under the control of the control unit 40, the nozzle unit 30 can selectively connect to the compressed air connection unit 10 or the fan air supply unit 20, so that the nozzle unit 30 sprays airflow and forms an air curtain.

[0072] The air curtain system provided by the present application has two power air sources, namely a compressed air connection unit 10 and a fan air supply unit 20. The control unit 40 can control the compressed air connection unit 10 to provide compressed air to the nozzle unit 30 to form an air curtain, or control the fan air supply unit 20 to supply air to the nozzle unit 30 to form an air curtain. By integrating these two power air sources together, the nozzle unit 30 can be connected and used as needed. The compressed air supply and the fan air supply are backup for each other, and the switching is convenient, thereby greatly improving the reliability of the system, which is particularly important for application in emergency sites of nuclear power plant accidents.

[0073] For example, when the main power is lost, the motor fails and there is a compressed air supply, the compressed air supply circuit can be switched manually or automatically to maintain the existence of the air curtain. Similarly, after the compressed air supply is lost, and there is power, the fan can be turned on manually or automatically to maintain the existence of the air curtain.

[0074] Since the compressed air power source and the power supply have different properties, the probability of losing these two types of power sources at the same time is very small. Therefore, the reliability of the air curtain system provided in this application is very high and can meet the use requirements in special scenarios such as nuclear power plant reactor accidents. The reliability and habitability of emergency places such as the main control room are improved, and ultimately the inherent safety of the nuclear power plant is improved.

[0075] The number of boundary doors in emergency places such as the second-generation reactor control room is as high as 17 to 30, most of which are non-sealed doors. The air curtain system provided in this application can effectively solve the isolation problem of boundary doors in such emergency places under accident conditions. In addition, for other places such as office buildings, canteens, clubs and cultural centers, as long as there are places with large internal and external areas for mass, component and energy exchange, the air curtain system can be used to solve the sealing isolation problem and achieve energy saving, comfort, safety and other use effects.

[0076] In some examples, the compressed air connection unit 10 and the fan air supply unit 20 are each connected to the nozzle unit 30 through a pipeline, and a corresponding valve is provided on the pipeline. The control unit 40 controls the opening and closing of the valve so that the nozzle unit 30 can selectively connect to the compressed air connection unit 10 or the fan air supply unit 20.

[0077] In some examples, the air curtain system provided in the embodiments of the present application further includes an operation status monitoring unit, which is used to monitor the operation status of the compressed air connection unit 10 and / or the fan air supply unit 20. Through the above settings, the automatic switching of the two power air sources of the compressed air connection unit 10 and the fan air supply unit 20 can be achieved.

[0078] Exemplarily, the fan air supply unit 20 can be used as a backup air supply mode, and the operation status monitoring unit monitors the operation status of the compressed air connection unit 10. When it is detected that the compressed air connection unit 10 has an operation abnormality, the fan air supply unit 20 is controlled to supply air to the nozzle unit 30. For example, the operation abnormality of the compressed air connection unit 10 may include insufficient compressed air source, pipeline leakage, abnormal valve switch state, etc. The operation status monitoring unit may include at least one of the detection devices such as pressure sensor and / or flow sensor, but is not limited thereto.

[0079] Exemplarily, the compressed air connection unit 10 can be used as a backup air supply mode, and the operation status monitoring unit monitors the operation status of the fan air supply unit 20. When it is detected that the fan air supply unit 20 has an operation abnormality, the compressed air connection unit 10 is controlled to supply air to the nozzle unit 30. For example, the operation abnormality of the fan air supply unit 20 may include power failure (main power loss), fan failure, pipeline leakage, abnormal valve switch state, etc. The operation status monitoring unit may include at least one of the detection devices such as a voltmeter, an ammeter, a pressure sensor, and a flow sensor, but is not limited thereto.

[0080] In some examples, such as Figure 1 As shown, the air curtain system provided in the embodiment of the present application also includes a filter unit 60, and the compressed air connection unit 10 and the fan air supply unit 20 are connected to the nozzle unit 30 through the filter unit 60, and the filter unit 60 includes a nuclear-grade radioactive air filter.

[0081] Through the above arrangement, the airflow from the compressed air connection unit 10 or the fan air supply unit 20 is first filtered through the nuclear-grade radioactive air filter and then transmitted to the nozzle 30. The radioactive air filter can effectively filter out radioactive pollutants in the airflow, thereby reducing the radiation dose of the staff in the emergency site, improving the reliability and habitability of the emergency site, and ultimately improving the inherent safety of the nuclear power plant.

[0082] In some examples, a nuclear-grade radioactive air filter may include an iodine adsorber made of, for example, activated carbon or an equivalent carbon fiber material (such as carbon fiber felt), or may include a particle filter made of glass fiber filter paper.

[0083] Figure 2 Schematic diagram of the structure of the compressed air connection unit 10 provided in the embodiment of the present application. Figure 2 As shown, the compressed air connection unit 10 includes components such as an air duct 11 and a connector 12. The connector 12 is disposed at one end of the air duct 11, and the other end of the air duct 11 is connected to the nozzle unit 30 through the filter unit 60. The connector 12 is used to connect to a compressed air source so that the compressed air can be transmitted to the filter unit 60 through the air duct 11.

[0084] In some examples, the compressed air source may include at least one of a compressed air pipeline network, an air compressor, or a compressed air storage element (eg, an air tank).

[0085] In some examples, the pressure range of compressed air is 0.1-10 MPa, for example, the pressure range of compressed air can be 0.2-5 MPa, 0.5-8 MPa or 0.3-2.0 MPa, etc., and the temperature of compressed air can be room temperature. Exemplarily, the pressure range of compressed air can be 0.3-0.8 MPa, which is a compressed air power source commonly provided and used in industrial application scenarios.

[0086] In some examples, such as Figure 2 As shown, the compressed air connection unit 10 also includes a control main valve 14 disposed on the air duct 11. The control main valve 14 may be, for example, a solenoid valve. The control main valve 14 is electrically connected to the control unit 40 and receives a switch (control) signal from the control unit 40 to connect or disconnect the air connection unit 10 with the nozzle unit 30. For example, the control unit 40 may control the control main valve 14 to open, at which time the compressed air connection unit 10 is connected to the nozzle unit 30 and can provide compressed air to the nozzle unit 30. The control unit 40 may also control the control main valve 14 to close, so that the compressed air connection unit 10 is disconnected from the nozzle unit 30. At this time, the fan air supply unit 20 may supply air to the nozzle unit 30 to form an air curtain.

[0087] In some examples, the main control valve 14 can also be controlled to have an opening adjusted, and the control unit 40 can change the flow rate of the compressed air delivered to the nozzle unit 30 by adjusting the opening of the main control valve 14 .

[0088] In some examples, such as Figure 2As shown, the compressed air connection unit 10 also includes a stop valve 13 arranged on the air duct 11 and located on the upstream side of the control main valve 14. The stop valve 13 can be a manual valve, and the compressed air circuit can be manually closed and opened by the stop valve 13.

[0089] In some examples, such as Figure 2 As shown, the compressed air connection unit 10 also includes an upstream pressure sensor 15 and a downstream pressure sensor 16 disposed on the induced air pipe 11. The upstream pressure sensor 15 is disposed on the upstream side of the control main valve 14, and is used to detect the pressure signal of the compressed air in the pipeline on the upstream side of the main valve. The downstream pressure sensor 16 is disposed on the downstream side of the control main valve 14, and is used to detect the pressure signal of the compressed air in the pipeline on the downstream side of the main valve. The upstream pressure sensor 15 and the downstream pressure sensor 16 transmit the detected pressure signals to the control unit 40, so that the control unit 40 can monitor the operation of the compressed air connection unit 10 in real time.

[0090] Figure 3 Schematic diagram of the structure of the fan air supply unit 20 provided in the embodiment of the present application. Figure 3 As shown, the fan air supply unit 20 includes an air supply pipe 21 and a fan 22. One end of the air supply pipe 21 is connected to the air outlet of the fan 22, and the other end of the air supply pipe 21 is connected to the filter unit 60. In this way, the fan 22 can provide a jet air source to the nozzle unit 30 through the air supply pipe 21 and the filter unit 60, so that the nozzle unit 30 sprays air flow and forms an air curtain.

[0091] In some examples, the fan 22 includes a motor and fan blades. The motor drives the fan blades to rotate to generate airflow. The motor may be, for example, an adjustable speed motor. The airflow rate can be adjusted by controlling the motor speed.

[0092] In some examples, such as Figure 3 As shown, the fan 22 is connected to the power supply via the control switch 26. By adjusting the state of the control switch 26, the fan 22 can be powered on to enter the working state, or the fan 22 can be powered off to exit the working state.

[0093] In some examples, such as Figure 3As shown, the fan air supply unit 20 also includes a control valve 25 disposed on the air supply pipe 21. The control valve 25 may be, for example, a solenoid valve. The control valve 25 is electrically connected to the control unit 40 and receives a switch (control) signal from the control unit 40 to connect or disconnect the fan air supply unit 20 and the nozzle unit 30. For example, the control unit 40 may control the control valve 25 to open, at which time the fan air supply unit 20 is connected to the nozzle unit 30 and can provide a jet air source to the nozzle unit 30. The control unit 40 may also control the control valve 25 to close, so that the fan air supply unit 20 is disconnected from the nozzle unit 30. At this time, the compressed air connection unit 10 may provide compressed air to the nozzle unit 30 to form an air curtain.

[0094] In some examples, the control valve 25 can also be opened to adjust the degree of opening, and the control unit 40 can change the flow rate of the airflow delivered to the nozzle unit 30 by adjusting the degree of opening of the control valve 25 .

[0095] In some examples, such as Figure 3 As shown, the fan air supply unit 20 also includes a speed sensor 23 and a flow sensor 24. The speed sensor 23 is used to detect the speed of the fan 22, and the flow sensor 24 is used to detect the air supply volume information of the fan 22 (for example, the air flow information in the air supply pipe 21). Among them, the flow sensor 24 sends the air supply volume information to the control unit 40. If the air volume does not reach the set value, an acceleration signal is given to the fan 22, and the speed of the fan 22 increases until the air volume reaches the set value. The speed sensor 23 transmits the speed signal of the fan 22 to the control unit 40 for display, control and protection.

[0096] The fan air supply unit 20 and the compressed air connection unit 10 cooperate to produce the following operation mode:

[0097] (1) Compressed air connection unit 10 is in operation and fan air supply unit 20 is in backup mode

[0098] The compressed air connection unit 10 normally supplies air to the nozzle unit 30 to generate an air curtain. When the upstream pressure sensor 15 and / or the downstream pressure sensor 16 detect that the compressed air is out of gas or the pressure is lower than the limit value, the control unit 40 will alarm, and the control main valve 14 can be closed manually or automatically, the control switch 26 of the fan air supply unit 20 can be closed manually or automatically, and the control valve 25 can be opened. The fan air supply unit 20 continues (relays) to supply air.

[0099] (2) The fan air supply unit 20 is in operation and the compressed air connection unit 10 is in backup mode

[0100] The fan air supply unit 20 normally supplies air to the nozzle unit 30 to generate an air curtain. When the speed sensor 23 shows a low speed and / or the flow sensor 24 shows a low flow signal, the control unit 40 alarms, and the control switch 26 can be manually or automatically controlled to jump open and close the control valve 25. When the pressure of the upstream pressure sensor 15 of the compressed air connection unit 10 is greater than the set value, the control main valve 14 can be manually or automatically opened, and the compressed air connection unit 10 continues (relays) to supply air.

[0101] If the pressure value detected by the upstream pressure sensor 15 is lower than the set value (i.e., no compressed air supply) and the control switch 26 is in a power-off state (main power is lost), the control unit 40 sends an emergency alarm signal in various ways such as sound and light that the air curtain has lost all functions.

[0102] Figure 4 Schematic diagram of the structure of the nozzle unit 30 provided in the embodiment of the present application. Figure 4 As shown, the filter unit 60 filters the airflow from the compressed air connection unit 10 or the fan air supply unit 20, and the filtered airflow is further transmitted to the nozzle unit 30. The nozzle unit 30 includes a plurality of nozzles 31 and a plurality of air ducts 32, one end of the air duct 32 is connected to the filter unit 60, and the other end is connected to the nozzle 31, and the plurality of air ducts 32 corresponds to the plurality of nozzles 31. The plurality of nozzles 31 are installed on the boundary door frame (for example, the inside or outside of the door) at a certain interval, and are used to spray airflow to form an air curtain.

[0103] In some examples, the spray direction and spray flow rate of the nozzle 31 are adjustable, and the control unit 40 can adjust the spray direction and / or spray flow rate of each nozzle 31 individually to obtain air curtains with different shapes (such as width / thickness) or different spray effects. For example, in order to better and more finely organize the flow field of the air curtain, a single group or multiple groups of nozzles can be set according to the needs of the site, and each group of nozzles can adjust the direction and flow rate individually.

[0104] That is to say, the present application can achieve fine adjustment of the direction, width and jet length of the air curtain by adjusting the direction and size of the nozzle 31 to meet the usage requirements of different boundary doors or different scenarios.

[0105] In some examples, a flow regulating valve 33 is provided on the air duct 32. The flow regulating valve 33 may be, for example, a solenoid valve or an electrically controlled valve. The flow regulating valve 33 is communicatively connected to a control unit 40. The control unit 40 may control the flow regulating valve 33 (for example, adjust the opening), thereby adjusting the injection flow of the nozzle 31 at the rear end.

[0106] In some examples, such as Figure 1As shown, the air curtain system provided in the embodiment of the present application further includes a temperature regulating unit 50, one end of which is connected to the compressed air connection unit 10, and the other end is connected to the filter unit 60. The temperature regulating unit 50 is used to regulate the temperature of the compressed air from the compressed air connection unit 10 and then transmit it to the nozzle unit 30 through the filter unit 60. For example, the temperature regulating unit 50 can heat the compressed air and then transmit it to the nozzle unit 30, or cool the compressed air and then transmit it to the nozzle unit 30.

[0107] Through the above arrangement, the nozzle unit 30 can be provided with an air source with a suitable temperature, that is, the temperature of the air curtain can be adjusted, and the comfort of personnel passing through the air curtain can be improved. In addition, the air curtain with a suitable temperature can also adjust the temperature in the emergency place, play an air conditioning effect, and thus improve the habitability of the emergency place. As a result, the air curtain system provided by the present application can meet the use requirements in more scenarios.

[0108] In some examples, the air temperature regulating unit 50 may include at least one of an electric heater (eg, a heating wire), a heat exchanger (eg, an evaporator, a condenser, or a heat exchange plate), a semiconductor refrigerator, or the like.

[0109] In some examples, such as Figure 1 As shown, the air curtain system provided in the embodiment of the present application further includes a constant temperature pipe 51 arranged in parallel with the air temperature regulating unit 50, one end of the constant temperature pipe 51 is connected to the compressed air connection unit 10, and the other end is connected to the filter unit 60. The control unit 40 is used to control the compressed air from the compressed air connection unit 10 to be transmitted to the nozzle unit 30 through the air temperature regulating unit 50 or the constant temperature pipe 51.

[0110] Through the above configuration, under the control of the control unit 40, the compressed air from the compressed air connection unit 10 can be directly transmitted to the nozzle unit 30 through the normal temperature pipe 51 (that is, the compressed air does not need to be temperature-regulated); it can also be transmitted to the nozzle unit 30 after being temperature-regulated by the temperature regulating unit 50; or part of the compressed air is directly transmitted to the nozzle unit 30 through the normal temperature pipe 51, and the other part is transmitted to the nozzle unit 30 after being temperature-regulated by the temperature regulating unit 50. This makes the use of the air curtain system provided by the present application more flexible and can meet the use requirements in more scenarios.

[0111] In some examples, the control unit 40 controls the compressed air to be transmitted to the nozzle unit 30 through the temperature regulating unit 50 or the constant temperature pipe 51. It can be: the control unit 40 controls all the compressed air from the compressed air connection unit 10 to be transmitted to the nozzle unit 30 through the temperature regulating unit 50; or all of the compressed air is transmitted to the nozzle unit 30 through the constant temperature pipe 51; or part of the compressed air is transmitted to the nozzle unit 30 through the temperature regulating unit 50, and the other part is transmitted to the nozzle unit 30 through the constant temperature pipe 51. For example, these two airflows can be mixed and then transmitted to the nozzle unit 30.

[0112] Figure 5 Schematic diagram of the structure of the temperature adjustment unit 50 provided in the embodiment of the present application. Figure 6 Schematic diagram of the structure of the vortex tube 52 provided in the embodiment of the present application.

[0113] like Figure 5 and Figure 6 As shown, the air temperature regulating unit 50 provided in the embodiment of the present application includes a vortex tube 52, which includes an air inlet 521, a cold air outlet 522 and a hot air outlet 523. The air inlet 521 is connected to the compressed air connection unit 10, and the control unit 40 is used to control the air temperature regulating unit 50 so that the cold air outlet 522 transmits the cooled compressed air (cold air flow) to the nozzle unit 30, or the hot air outlet 523 transmits the heated compressed air (hot air flow) to the nozzle unit 30.

[0114] The main body of the air temperature regulating unit 50 provided in the present application is a vortex tube 52, which is a device with a simple and compact structure that can simultaneously separate high-pressure gas into two low-pressure airflows of high temperature and low temperature. The air inlet 521 of the vortex tube 52 is connected to the compressed air connection unit 10. By using the pressure of the compressed air, without the need to set up other power devices, the vortex tube 52 can output two airflows of different temperatures, cold and hot. Under the control of the control unit 40, the vortex tube 52 can selectively output a cold airflow or a hot airflow to the nozzle unit 30, and in combination with the normal temperature airflow output by the normal temperature tube 51, the nozzle unit 30 can selectively output three airflows of different temperatures, cold, normal temperature, and hot, thereby making the use of the air curtain system provided in the present application more flexible and able to meet the use requirements in more scenarios. And due to the simple structure and working characteristics of the vortex tube 52, the reliability and stability of the entire system are very high.

[0115] In some examples, under the control of the control unit 40, the cold air flow output by the cold air outlet 522 can be mixed with the normal temperature air flow output by the normal temperature tube 51 and then transmitted to the nozzle unit 30, or the hot air flow output by the hot air outlet 523 can be mixed with the normal temperature air flow output by the normal temperature tube 51 and then transmitted to the nozzle unit 30, thereby enabling the nozzle unit 30 to output an air curtain with more temperature options.

[0116] like Figure 6 As shown, the vortex tube 52 includes a shell 520, a vortex chamber is formed in the shell 520, and an air inlet 521, a cold air outlet 522 and a hot air outlet 523 connected to the vortex chamber are opened on the shell 520.

[0117] The basic working principle of the vortex tube is to use compressed air, which is injected into the vortex chamber along the tangential direction through the air inlet 521, and the compressed air is allowed to rotate and flow at high speed along the vortex chamber and the inner wall of the shell in the vortex chamber, producing a Ranque-Hilsch separation effect, wherein the airflow temperature at the center of the vortex tube becomes cold and can be drawn out from the cold air outlet 522; while the outer layer of gas located on the inner wall becomes hot and can be drawn out from the hot air outlet 523, thereby generating two streams of cold and hot air. By adjusting the structural parameters of the vortex tube, the temperature and pressure of the compressed air, and the output parameters and ratios of the cold and hot end airflows, the desired optimal heating or cooling effect can be obtained.

[0118] Advantages of vortex tubes include:

[0119] (1) Wide temperature range of the working fluid: According to current research on vortex tubes, the lowest temperature at the cold end of the vortex tube can reach -46°C, and the highest temperature at the hot end can reach 127°C;

[0120] (2) No pollution: The vortex tube is used as a refrigeration device, unlike the refrigerant leakage used in traditional refrigeration equipment, which will pollute the environment and prevent the refrigerant from being harmful to the human body;

[0121] (3) The vortex tube has a simple structure, no moving parts, high reliability and easy maintenance;

[0122] (4) Quick start-up and simple temperature and flow adjustment;

[0123] The temperature regulating unit 50 can achieve the best control requirements on temperature and air volume by using and adjusting parameters of a group of vortex tubes of the same specifications, or by using an internal combination of vortex tubes of different specifications according to the specific needs of the application scenario.

[0124] like Figure 5 As shown, the temperature adjustment unit 50 further includes a hot air pipe 53, a cold air pipe 54, a hot air exhaust pipe 55, a cold air exhaust pipe 56, control valves 571-576 and temperature sensors 581-584. The control valves 571-576 and the temperature sensors 581-584 are respectively connected to the control unit 40 for communication.

[0125] Among them, the compressed air connection unit 10 provides compressed air, which is connected to the air inlet 521 of the vortex tube 52, the hot air outlet 523 of the vortex tube 52 is connected to the hot air pipe 53 and the hot air discharge pipe 55, the cold air outlet 522 of the vortex tube 52 is connected to the cold air pipe 54 and the cold air discharge pipe 56, and the air inlet 521 of the vortex tube 52 is connected to the normal temperature pipe 51.

[0126] More specifically, one end of the hot air pipe 53 is connected to the hot air outlet 523, and the other end is connected to the filter unit 60, and a control valve 574 is provided on the hot air pipe 53. One end of the hot air discharge pipe 55 is connected to the hot air outlet 523, and the other end is connected to the atmospheric environment, and a control valve 572 is provided on the hot air discharge pipe 55. One end of the cold air pipe 54 is connected to the cold air outlet 522, and the other end is connected to the filter unit 60, and a control valve 573 is provided on the cold air pipe 54. One end of the cold air discharge pipe 56 is connected to the cold air outlet 522, and the other end is connected to the atmospheric environment, and a control valve 571 is provided on the cold air discharge pipe 56. One end of the normal temperature pipe 51 is connected to the compressed air connection unit 10, and the other end is connected to the filter unit 60, and a control valve 575 is provided on the normal temperature pipe 51.

[0127] A temperature sensor 581 is connected to the air inlet 521 of the vortex tube 52 to measure the temperature of the compressed air. A temperature sensor 582 is provided after the control valve 573 of the cold air duct 54 to measure the temperature of the cold air. A temperature sensor 583 is provided after the control valve 574 of the hot air duct 53 to measure the temperature of the hot air. A temperature sensor 584 is provided on the collection pipeline from the vortex tube 52 to the filter unit 60 to measure the air supply temperature of the air curtain. The four temperature sensors transmit temperature signals to the control unit 40 for adjusting the final air supply temperature of the compressed air.

[0128] In some examples, the shell of the vortex tube 52, the hot air pipe 53, the cold air pipe 54 and other related pipes can be made of insulating materials such as porous vacuum silicon and wrapped externally to prevent burns caused by high and low temperatures and heat exchange.

[0129] Based on the above, the compressed air connection unit 10 has the following three air supply modes:

[0130] (1) Providing a cold air source to the nozzle unit 30 (the cold air flow is mixed with the normal temperature air flow and then transmitted to the nozzle unit 30):

[0131] The compressed air connection unit 10 provides compressed air to the vortex tube 52 and the normal temperature tube 51, opens the control valves 572, 573, 575, and closes the control valves 571 and 574. The compressed air enters the vortex tube 52 and the normal temperature tube 51, and the cold air flows from the cold air tube 54 through the control valve 573 to the front side of the filter unit 60, and the normal temperature air flows through the normal temperature tube 51 and the control valve 575 to the front side of the filter unit 60. The cold air flows and the normal temperature air flows are mixed in front of the filter unit 60, and after being filtered by the filter unit 60, a cold air source is provided to the nozzle unit 30.

[0132] The temperature at the corresponding position can be obtained through temperature sensors 581, 582, 584, and the temperature and air supply of the cold air source can be adjusted through control valves 572, 573, 575. The hot air generated by the vortex tube 52 can be discharged into the atmosphere by opening the control valve 572. It should be noted that the exhaust port discharges air with a higher temperature to prevent burns to personnel. The hot air can also be introduced into the space where the heat source is needed for use.

[0133] In some examples, the compressed air connection unit 10 can only provide compressed air to the vortex tube 52, and the control valve 575 can be closed at this time. In this way, the cold air flow from the cold air pipe 54 to the front side of the filter unit 60 through the control valve 573 without mixing with the normal temperature air flow, and the cold air flow filtered by the filter unit 60 is transmitted to the nozzle unit 30 to generate an air curtain with a lower temperature.

[0134] (2) Providing a hot air source to the nozzle unit 30 (the hot air flow is mixed with the normal temperature air flow and then transmitted to the nozzle unit 30):

[0135] The compressed air connection unit 10 provides compressed air to the vortex tube 52 and the normal temperature tube 51, opens the control valves 571, 574, 575, and closes the control valves 572 and 573. The compressed air enters the vortex tube 52 and the normal temperature tube 51, and the hot air flow reaches the front side of the filter unit 60 from the hot air tube 53 through the control valve 574, and the normal temperature air flow reaches the front side of the filter unit 60 through the normal temperature tube 51 and the control valve 575. The hot air flow and the normal temperature air flow are mixed in front of the filter unit 60, and after being filtered by the filter unit 60, a hot air source is provided to the nozzle unit 30.

[0136] The temperature at the corresponding position can be obtained through the temperature sensors 581, 583, and 584, and the temperature and air supply of the hot air source can be adjusted through the control valves 571, 574, and 575. The cold air generated by the vortex tube 52 can be discharged into the atmosphere by opening the control valve 571. It should be noted that the exhaust port discharges air at a relatively cold temperature to prevent frostbite to personnel. The cold air can also be introduced into the space where a cold source is needed for use.

[0137] In some examples, the compressed air connection unit 10 can only provide compressed air to the vortex tube 52, and the control valve 575 can be closed at this time. In this way, the hot air flow from the hot air pipe 53 to the front side of the filter unit 60 through the control valve 574 without mixing with the normal temperature air flow, and the hot air flow filtered by the filter unit 60 is transmitted to the nozzle unit 30 to generate an air curtain with a higher temperature.

[0138] (3) Providing a normal temperature gas source to the nozzle unit 30:

[0139] The compressed air connection unit 10 provides compressed air to the normal temperature pipe 51, opens the control valve 575, and closes the control valves 571, 572, 573, and 574. The compressed air passes through the normal temperature pipe 51 to the filter unit 60, and provides a normal temperature air source to the nozzle unit 30.

[0140] Figure 7 Schematic diagram of the structure of the filter unit 60 provided in the embodiment of the present application. Figure 7 As shown, the filter unit 60 provided in the embodiment of the present application includes a main filter 62, a pressure difference sensor 63 and a spare filter 68. Among them, the pressure difference sensor 63 is used to detect the air pressure difference between the front and rear sides of the main filter 62, and transmit the detected air pressure difference to the control unit 40. The control unit 40 is used to control the spare filter 68 to replace the main filter 62 for air filtering when the air pressure difference exceeds the preset pressure threshold, that is, the spare filter 68 replaces the main filter 62 to continue filtering and purifying the airflow from the compressed air connection unit 10 or the fan air supply unit 20.

[0141] The filter unit 60 provided in the present application includes a main filter 62 (for example, it can be a default filter) and a spare filter 68, which can back up each other and can realize automatic switching. In the event of an accident emergency, the main filter 62 has a high pressure difference and may be blown apart, and the filtering ability will be completely lost. The air curtain will carry radioactive pollutants, causing harm to the entrants and possibly increasing the risk of radioactive pollutants entering the habitable area through the boundary gate. The present application can greatly reduce the risk of the main filter 62 being blown apart by performing pressure difference monitoring, automatic switching and pressure difference alarm on the main filter 62, and timely replace the spare filter 68 before the filter 62 is blown apart, effectively preventing the air curtain from carrying radioactive pollutants, and greatly improving the reliability and continuous operation capability of the system.

[0142] like Figure 7 As shown, the filter unit 60 provided in the embodiment of the present application specifically includes an air inlet, a box body 61, a main filter 62, a spare filter 68, a pressure difference sensor 63, control valves 64-67 and an air outlet.

[0143] The filter unit 60 uses two sets of boxes 61 arranged in parallel. The boxes 61 can be, for example, insulated boxes. The two boxes 61 are used to respectively set a main filter 62 and a spare filter 68. The two filters can be, for example, nuclear-grade radioactive air filters. For normal operation, only one of the columns needs to be operated, and the other column is used as a spare. For example, the main filter 62 is operated, and the spare filter 68 is used as a spare.

[0144] The signal of the differential pressure sensor 63 is connected to the control unit 40. The control valves 64 and 66 form a group, and the control valves 65 and 67 form a group. During normal operation, one group of control valves is open (for example, the control valves 64 and 66 are open), and the other group of control valves is closed (for example, the control valves 65 and 67 are closed). When the differential pressure detected by the differential pressure sensor 63 on the operating side reaches the upper limit, an alarm is issued to prompt that the filter needs to be replaced. The control valves of another column of circuits (i.e., control valves 65 and 67) can be opened manually or automatically, and then the control valves of the current operating column (i.e., control valves 64 and 66) are closed, and another column of filters (i.e., spare filter 68) are put into operation. The filter of the current column can be replaced or cleaned.

[0145] In some examples, the nozzle unit 30 is disposed on a boundary door frame, such as Figure 1 As shown, the air curtain system provided in the embodiment of the present application also includes a door opening and closing monitoring unit 70, and the control unit 40 is used to control the nozzle unit 30 to spray at a first flow rate when the door opening and closing monitoring unit 70 detects that the boundary door is in an open state; when the door opening and closing monitoring unit 70 detects that the boundary door is in a closed state, the nozzle unit 30 is controlled to spray at a second flow rate, wherein the first flow rate is greater than the second flow rate.

[0146] The air curtain system provided by the present application also includes a switch door monitoring unit 70 for monitoring the switch state of the boundary door. When the switch door monitoring unit 70 detects that the boundary door is in an open state, the nozzle unit 30 is controlled to spray at a larger flow rate (i.e., the first flow rate), thereby achieving a better sealing and isolating effect. When the switch door monitoring unit 70 detects that the boundary door is in a closed state, at this time, since the boundary door already has a good isolation effect, the control unit 40 can control the nozzle unit 30 to spray at a smaller flow rate (i.e., the second flow rate), thereby achieving the effect of energy saving and consumption reduction.

[0147] In some examples, the door opening and closing monitoring unit 70 includes human body detection sensors on both sides of the door, a closing position sensor installed on the door, a voice alarm, etc.

[0148] The air curtain system needs to provide different jet flow rates of the air curtain when the boundary door is closed and opened. When the air curtain is opened, a larger flow rate is required to establish an air curtain to achieve a better shielding effect. When the door is closed, if the same jet flow rate is maintained, not only will the energy consumption be large, but the strong air turbulence and the airflow swept to the ground may cause a suction effect on the outside of the door at the bottom edge, thereby sucking in external polluted air through the gap under the door.

[0149] Therefore, when the door is closed, the control unit 40 controls the nozzle unit 30 to generate an air curtain with a relatively small flow rate, which plays a role of static sealing and also saves energy. When the human detection sensors installed near the two sides of the door sense that a person is approaching, they transmit a signal to the control unit 40, and the control unit 40 issues a request to increase the purge volume. After receiving the signal, the control unit 40 increases the fan speed or opens the relevant compressed air control valve to increase the flow rate in advance according to the current operation mode, so as to pre-establish an air curtain with a large air volume before the door is opened, which has a better partition effect.

[0150] When the human body sensors on both sides of the door sense that a person is approaching, they can also trigger the voice alarm to emit a preset continuous warning sound, such as: "Please pass through the boundary door as soon as possible, do not stay, and close the door." and other sentences until no one is detected.

[0151] The closed position sensor on the door transmits a closed signal to the control unit 40 when the door is closed. After the door is opened, the door opening signal is transmitted to the control unit 40 and the timing is started. After the set time is reached, if the door is not closed in place, the local and remote alarms are activated to indicate that the door is not closed in place and intervention is required.

[0152] Figure 8 Schematic diagram of the structure of the control unit 40 provided in the embodiment of the present application. Figure 8 As shown, the control unit 40 is composed of a signal receiving module 42 , a signal processing module 43 , a control module 41 , an alarm module 44 and a power supply module 45 .

[0153] The signal receiving module 42 receives analog and digital signals from various sensors, control switches, and control valves of the entire system, sends the signals to the signal processing module 43 for signal processing or comparison with preset values, and sends the final processed signal and comparison value to the control module 41. The control module 41 sends an adjustment signal to the relevant control switch, control valve, and alarm module to perform relevant operations and alarm prompts. The power supply module 45 provides power supply of different voltage levels and control and signal circuit backup power supply to the relevant equipment that requires power. The power supply module 45 is equipped with its own power management control, current, voltage protection, control, automatic input of signal circuit backup power supply, and various alarm functions. The control module 41 can be arranged on-site, or it can be remotely monitored, operated, and alarmed by wire or wireless means.

[0154] The present application also provides a control method for an air curtain system, which can be applied to the aforementioned air curtain system. For example, the air curtain system can be the aforementioned Figure 1-Figure 8 For the air curtain system shown, the execution body of the control method may be, for example, the aforementioned control unit 40 .

[0155] The air curtain system includes a compressed air connection unit, a fan air supply unit, a nozzle unit and a control unit. The control method is executed by the control unit. The control method includes:

[0156] The compressed air connection unit is controlled to provide compressed air to the nozzle unit, or the fan air supply unit is controlled to supply air to the nozzle unit, so that the nozzle unit sprays air flow and forms an air curtain.

[0157] In some examples, the air curtain system further includes a temperature regulating unit, which is used to regulate the temperature of the compressed air from the compressed air connection unit before transmitting it to the nozzle unit; the air curtain system further includes a constant temperature pipe arranged in parallel with the temperature regulating unit; the control method further includes:

[0158] The compressed air from the compressed air connection unit is controlled to be transmitted to the nozzle unit through the air temperature regulating unit or the constant temperature pipe.

[0159] In some examples, the air temperature regulating unit includes a vortex tube, the vortex tube includes an air inlet, a cold air outlet, and a hot air outlet, and the air inlet is connected to the compressed air connection unit; the control method further includes:

[0160] The temperature adjustment unit is controlled so that the cold air outlet transmits the compressed air after cooling to the nozzle unit, or the hot air outlet transmits the compressed air after heating to the nozzle unit.

[0161] In some examples, the air curtain system further includes a filter unit, the compressed air connection unit and the fan air supply unit are connected to the nozzle unit through the filter unit, and the filter unit includes a nuclear-grade radioactive air filter; the filter unit includes a main filter, a pressure difference sensor and a spare filter; wherein the pressure difference sensor is used to detect the air pressure difference between the front and rear sides of the main filter; the control method further includes:

[0162] When the air pressure difference exceeds a preset pressure threshold, the backup filter is controlled to replace the main filter to perform air filtering.

[0163] In some examples, the nozzle unit is disposed on a boundary door frame, the air curtain system further includes a door opening and closing monitoring unit; and the control method further includes:

[0164] When the door opening and closing monitoring unit detects that the boundary door is in an open state, the nozzle unit is controlled to spray at a first flow rate; when the door opening and closing monitoring unit detects that the boundary door is in a closed state, the nozzle unit is controlled to spray at a second flow rate, and the first flow rate is greater than the second flow rate.

[0165] In some examples, the air curtain system further includes an operation status monitoring unit; and the control method further includes:

[0166] When the operation status monitoring unit detects that the compressed air connection unit has an operation abnormality, the fan air supply unit is controlled to supply air to the nozzle unit; and / or, when the operation status monitoring unit detects that the fan air supply unit has an operation abnormality, the compressed air connection unit is controlled to supply compressed air to the nozzle unit.

[0167] The present application also provides a control device 80 for an air curtain system. Fig. 9 80 is a structural block diagram of the control device 80 provided in the embodiment of the present application. Fig. 9 As shown, the control device 80 includes a processor 81 and a memory 82 , and the above-mentioned components can be connected via one or more buses 83 .

[0168] The control device 80 also includes a computer program 821, which is stored in the memory 82. When the computer program 821 is executed by the processor 81, the control device 80 executes the control method of the air curtain system provided in the above embodiment. Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding entity device, and will not be repeated here.

[0169] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed on an electronic device, the electronic device executes the control method of the air curtain system provided in the above embodiment.

[0170] The embodiment of the present application further provides a computer program product, including: a computer program code, when the computer program code is executed on an electronic device, the electronic device executes the control method of the air curtain system provided in the above embodiment.

[0171] The embodiment of the present application further provides a chip, including: a processor, which is used to call and run a computer program from a memory, so that an electronic device equipped with the chip executes the control method of the air curtain system provided in the above embodiment.

[0172] Through the description of the above implementation mode, those skilled in the art can understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0173] It should be understood that the devices and processes disclosed in the several embodiments provided in the present application can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device. In addition, some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0174] The units described as separate components may or may not be physically separated. The components shown as units may be one physical unit or multiple physical units. That is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected to achieve the purpose of this solution according to actual needs.

[0175] In addition, each functional unit in each embodiment of the present application may be integrated into a processing unit; or may exist physically separately; or some units may be integrated into one unit, and some units may exist physically separately. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software functional units.

[0176] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, all or part of the technical solution of the embodiment of the present application can be embodied in the form of a software product. The software product is stored in a storage medium. The software product includes several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0177] It should be noted that all or part of the above-mentioned embodiments provided in the present application (for example, part or all of any feature) can be arbitrarily combined or used in combination with each other.

[0178] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An air curtain system, characterized in that: It comprises a compressed air connection unit (10), a fan air supply unit (20), a nozzle unit (30) and a control unit (40), wherein: The control unit (40) is used to control the compressed air connection unit (10) to provide compressed air to the nozzle unit (30), or to control the fan air supply unit (20) to supply air to the nozzle unit (30), so that the nozzle unit (30) sprays air flow and forms an air curtain.

2. The air curtain system according to claim 1, characterized in that: The air curtain system further comprises an air temperature regulating unit (50), wherein the air temperature regulating unit (50) is used to regulate the air temperature of the compressed air from the compressed air connection unit (10) before transmitting the compressed air to the nozzle unit (30).

3. The air curtain system according to claim 2, characterized in that: The air curtain system further comprises a constant temperature pipe (51) arranged in parallel with the air temperature regulating unit (50), and the control unit (40) is used to control the compressed air from the compressed air connection unit (10) to be transmitted to the nozzle unit (30) through the air temperature regulating unit (50) or the constant temperature pipe (51).

4. The air curtain system according to claim 3, characterized in that: The air temperature regulating unit (50) comprises a vortex tube (52), the vortex tube (52) comprises an air inlet (521), a cold air outlet (522) and a hot air outlet (523), and the air inlet (521) is connected to the compressed air connection unit (10); The control unit (40) is used to control the air temperature regulating unit (50) so that the cold air outlet (522) transmits cooled compressed air to the nozzle unit (30), or the hot air outlet (523) transmits heated compressed air to the nozzle unit (30).

5. The air curtain system according to any one of claims 1 to 4, characterized in that: The air curtain system further comprises a filter unit (60), the compressed air connection unit (10) and the fan air supply unit (20) are connected to the nozzle unit (30) via the filter unit (60), and the filter unit (60) comprises a nuclear-grade radioactive air filter.

6. The air curtain system according to claim 5, characterized in that: The filtering unit (60) comprises a main filter (62), a differential pressure sensor (63) and a backup filter (68); wherein: The differential pressure sensor (63) is used to detect the differential pressure between the front and rear sides of the main filter (62); The control unit (40) is used to control the backup filter (68) to replace the main filter (62) to perform air filtering when the air pressure difference exceeds a preset pressure threshold.

7. The air curtain system according to any one of claims 1 to 4, characterized in that: The nozzle unit (30) is arranged on the boundary door, and the air curtain system further comprises a door opening and closing monitoring unit (70); The control unit (40) is used to control the nozzle unit (30) to spray at a first flow rate when the door opening and closing monitoring unit (70) detects that the boundary door is in an open state; and to control the nozzle unit (30) to spray at a second flow rate when the door opening and closing monitoring unit (70) detects that the boundary door is in a closed state, wherein the first flow rate is greater than the second flow rate.

8. The air curtain system according to any one of claims 1 to 4, characterized in that: The air curtain system also includes an operation status monitoring unit; The control unit is used to control the fan air supply unit (20) to supply air to the nozzle unit (30) when the operation status monitoring unit detects that the compressed air connection unit (10) has an abnormal operation; and / or, When the operation status monitoring unit detects that the fan air supply unit (20) has an abnormal operation, the compressed air connection unit (10) is controlled to provide compressed air to the nozzle unit (30).

9. A control method for an air curtain system, characterized in that: The air curtain system comprises a compressed air connection unit (10), a fan air supply unit (20), and a nozzle unit (30), and the control method comprises: The compressed air connection unit (10) is controlled to provide compressed air to the nozzle unit (30), or the fan air supply unit (20) is controlled to supply air to the nozzle unit (30), so that the nozzle unit (30) sprays air flow and forms an air curtain.

10. A control device for an air curtain system, characterized in that: include: processor; Memory; and a computer program, wherein the computer program is stored in the memory, and when the computer program is executed by the processor, the control device executes the control method according to claim 9.

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