An environment-friendly and energy-saving radon chamber, a radon concentration control method thereof and an electronic device

Abstract

The application discloses an environment-friendly and saving radon chamber, a radon concentration control method thereof and electronic equipment. The environment-friendly and saving radon chamber is provided with a separate radon buffer storage chamber. When the radon chamber does not need radon supplement, the three-way valve and the air pump are both closed, and the radon gas is self-circulated in the radon storage tank to realize radioactive balance. When the radon chamber needs radon supplement, the three-way valve and the air pump are both opened, the radon storage tank is connected with the radon chamber, and the radon gas in the radon storage tank is pumped to the radon chamber by the air pump to realize the radon supplement function. Therefore, the closed loop circulation and accurate scheduling of the radon gas in the system are realized, and the radon concentration of the radon chamber is dynamically controlled. The technical scheme provided in the embodiment of the application completely encloses the radon gas generated by the radon source in the system for recycling, which not only eliminates the environmental pollution and health risks of radioactive waste gas emission, but also maximizes the utilization rate of the radon source.

Description

Technical Field

[0001] This invention relates to the field of radioactivity measurement and control technology, and in particular to an environmentally friendly and energy-saving radon chamber and its radon concentration control method and electronic equipment. Background Technology

[0002] A radon chamber is an experimental chamber used to generate and maintain a specific radon concentration. It can be used for the verification, calibration, and related scientific research of radon measuring instruments and detectors. During verification, calibration, or other experiments, it is typically necessary for the radon concentration in the chamber to be maintained stably for a period of time and to be able to switch to different concentrations according to experimental requirements. Maintaining the radon concentration requires continuous replenishment to compensate for losses due to radon decay and chamber leakage; while switching concentrations requires planning and operation based on the current and target concentrations, comprehensively considering radon decay, leakage, and replenishment behavior. Therefore, radon chambers usually require corresponding concentration control methods to achieve stable concentration maintenance and switching.

[0003] Traditionally, a flow-through radon source or a solid radon source is connected to a radon chamber, and a control system is used to regulate the intake or flow rate to achieve concentration control. However, after the concentration stabilizes, apart from intermittent replenishment of losses, most of the excess radon gas produced by the radon source is directly emitted into the atmosphere or waste gas treatment devices. This brings two problems: firstly, if radon and its decay products form radioactive aerosols, they may cause internal radiation damage if inhaled; secondly, a large amount of radon gas is wasted, forcing the system to use radon sources with higher activity or extend the control time, resulting in resource waste and increased costs. Summary of the Invention

[0004] This invention provides an environmentally friendly and energy-saving radon chamber and its radon concentration control method and electronic equipment, which not only eliminates environmental pollution and health risks from the emission of radioactive waste gas, but also maximizes the utilization rate of radon sources.

[0005] According to one aspect of the present invention, an environmentally friendly and energy-saving radon chamber is provided, comprising a radon source, a radon storage tank, a pipe interface, a three-way valve, a vacuum pump, a control center, a radon chamber, a fan, a first radon measuring instrument, and a second radon measuring instrument;

[0006] The radon source is connected to the radon storage tank, which is connected to the three-way valve via the pipe interface. The three-way valve is connected to the air extraction pump, which is connected to the radon chamber. The fan is installed on the radon chamber. The first radon measuring instrument and the second radon measuring instrument are respectively connected to the radon chamber. The control center is connected to the three-way valve, the air extraction pump, and the first radon measuring instrument.

[0007] Optionally, the radon source is a solid radon source or a gaseous radon source, and the radon gas in the radon storage tank reaches radioactive equilibrium after 5 to 10 half-lives.

[0008] Optionally, when the radon chamber does not require radon replenishment, both the three-way valve and the air pump are closed, and the radon gas circulates within the radon storage tank. When the radon chamber requires radon replenishment, both the three-way valve and the air pump are open, connecting the radon storage tank to the radon chamber and supplying radon gas to it.

[0009] According to another aspect of the present invention, a method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber is provided, implemented by the environmentally friendly and energy-saving radon chamber described in any embodiment of the present invention, the method comprising:

[0010] Obtain the initial radon concentration inside the radon storage tank and the initial radon concentration inside the radon chamber;

[0011] Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated, and the time required for radon replenishment is determined. The three-way valve and the vacuum pump are then activated to replenish radon according to the required replenishment time. The preset parameters include: target concentration, allowable error, radon storage tank volume, radon chamber volume, decay constant, radon release rate, and vacuum pump exchange rate.

[0012] When the theoretical radon activity in the radon chamber reaches the upper limit of the target concentration, the three-way valve and the vacuum pump are closed, and the dynamic control phase begins. The dynamic control phase includes: when the theoretical radon activity in the radon chamber drops to the lower limit of the target concentration, the three-way valve and the vacuum pump are reopened to replenish the theoretical radon activity in the radon chamber to the upper limit of the target concentration, so as to achieve dynamic control. The upper and lower limits of the target concentration are obtained by adding or subtracting the allowable error from the target concentration.

[0013] Optionally, after opening the three-way valve and the vacuum pump to replenish radon according to the required radon replenishment time, the method further includes:

[0014] When the initial radon concentration in the radon chamber reaches the upper limit of the target concentration, the three-way valve and the air pump are shut off, and the dynamic control phase begins.

[0015] Optionally, after entering the dynamic control phase, it also includes:

[0016] If the target concentration needs to be adjusted, the target concentration is preset again, and the steps of obtaining the initial radon concentration in the radon storage tank and the initial radon concentration in the radon chamber are executed.

[0017] Optionally, based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated, and the time required for radon replenishment is determined, including:

[0018] Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated by solving a first-order differential equation, and the time required for radon replenishment is determined.

[0019] Optionally, based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated by solving a first-order differential equation, and the time required for radon replenishment is determined, including:

[0020] The theoretical radon activity inside the radon storage tank and the theoretical radon activity inside the radon chamber are calculated using the following formulas to determine the time required for radon replenishment:

[0021] In the formula, Let be the theoretical radon activity in the radon storage tank at time t. Radon activity at which the radon storage tank reaches radioactive equilibrium. Indicates time, The volume of the radon storage tank. , It is a constant. It is the sum of the physical decay constant of radon gas and the decay constants of the radon chamber, radon storage tank, extraction pump, and connecting pipelines caused by leakage and adsorption factors. This refers to the air exchange rate of the air pump. It is the sum of the reciprocals of the volume of the radon storage tank and the volume of the radon chamber;

[0022] In the formula, Let be the theoretical radon activity in the room at time t. The radon activity at which the radon chamber reaches radioactive equilibrium. This represents the volume of the radon chamber.

[0023] Optionally, the sum of the reciprocals of the radon storage tank volume and the radon chamber volume satisfies the following relationship:

[0024] ;

[0025] The radon activity when the radon storage tank reaches radioactive equilibrium is calculated using the following formula:

[0026] In the formula, Radon release rate;

[0027] Radon activity at radioactive equilibrium in a radon chamber is calculated using the following formula:

[0028] ;

[0029] constant , Calculate using the following formula:

[0030] In the formula, The initial radon activity in the radon storage tank. The initial radon activity in the radon chamber;

[0031] .

[0032] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0033] At least one processor; and

[0034] A memory communicatively connected to the at least one processor; wherein,

[0035] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the radon concentration control method for the environmentally friendly and energy-saving radon chamber according to any embodiment of the present invention.

[0036] The technical solution provided by this invention establishes an independent radon gas buffer storage chamber, i.e., a radon storage tank. When the radon chamber does not require radon replenishment, both the three-way valve and the extraction pump are closed, and the radon gas circulates within the storage tank to achieve radioactive balance. When the radon chamber requires radon replenishment, both the three-way valve and the extraction pump are opened, connecting the storage tank to the radon chamber, and the extraction pump draws the radon gas from the storage tank into the radon chamber, thus achieving the radon replenishment function. This achieves closed-loop circulation and precise scheduling of radon gas within the system, enabling dynamic control of the radon concentration in the radon chamber. The technical solution provided by this invention completely encloses the radon gas generated by the radon source within the system for recycling, eliminating environmental pollution and health risks from radioactive waste gas emissions while maximizing the utilization rate of the radon source.

[0037] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of an environmentally friendly and energy-saving radon chamber provided in an embodiment of the present invention;

[0040] Figure 2 A flowchart illustrating a method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber, provided as an embodiment of the present invention;

[0041] Figure 3A flowchart illustrating another environmentally friendly and energy-saving radon chamber radon concentration control method provided in this embodiment of the invention;

[0042] Figure 4 A schematic diagram of radon replenishment and dynamic stabilization control in the radon chamber after the radon storage tank is balanced, provided in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram illustrating radon replenishment and dynamic stabilization control in the radon chamber when the radon storage tank is unbalanced, provided in an embodiment of the present invention.

[0044] Figure 6 This is a schematic diagram of the electronic device used in an environmentally friendly and energy-saving radon chamber radon concentration control method provided in an embodiment of the present invention. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] Figure 1 A schematic diagram of an environmentally friendly and energy-saving radon chamber provided in an embodiment of the present invention is shown below. Figure 1 This environmentally friendly and energy-saving radon chamber includes a radon source 1, a radon storage tank 2, pipe interfaces 3, a three-way valve 4, a vacuum pump 5, a control center 6, a radon chamber 7, a fan 8, a first radon measuring instrument 9, and a second radon measuring instrument 10. See also... Figure 1 In the connections between various structures, double solid lines represent pipe connections, and single dashed lines represent electrical or communication connections.

[0048] Radon source 1 is connected to radon storage tank 2. Radon storage tank 2 is connected to three-way valve 4 through pipe interface 3. Three-way valve 4 is connected to air pump 5. Air pump 5 is connected to radon chamber 7. Fan 8 is installed on radon chamber 7. First radon measuring instrument 9 and second radon measuring instrument 10 are respectively connected to radon chamber 7. Control center 6 is connected to three-way valve 4, air pump 5 and first radon measuring instrument 9 respectively.

[0049] The radon source is connected only to the radon storage tank. It releases radon gas through decay, reaching radioactive equilibrium after 5-10 half-lives. At this point, the radon activity in the storage tank reaches its maximum value, allowing the tank to be used as a secondary radon source to replenish the radon chamber. The radon source does not release radioactive pollutants into the environment, and the radon gas it produces is collected and stored for replenishing the radon chamber, maximizing resource utilization while protecting the environment.

[0050] The fan controls the gas flow within the radon chamber to ensure uniformity of radon gas concentration. The first radon measuring instrument is a standard device for collecting the actual radon concentration within the chamber and transmitting the data to the control center. The second radon measuring instrument is a radon measuring instrument to be tested or used in experiments for practical applications within the radon chamber.

[0051] Optionally, the radon source can be a solid radon source or a gaseous radon source, and the radon gas in the storage tank reaches radioactive equilibrium after 5 to 10 half-lives.

[0052] Optionally, when the radon chamber does not require radon replenishment, both the three-way valve and the air pump are closed, and the radon gas circulates within the radon storage tank. When the radon chamber requires radon replenishment, both the three-way valve and the air pump are open, and the radon storage tank is connected to the radon chamber, supplying radon gas to the radon chamber.

[0053] Specifically, when the radon chamber does not require radon replenishment, both the three-way valve and the extraction pump are closed, and radon gas circulates within the radon storage tank to achieve radioactive equilibrium. When the radon chamber requires radon replenishment, both the three-way valve and the extraction pump are opened, connecting the radon storage tank to the radon chamber, and the extraction pump draws radon gas from the storage tank into the radon chamber, thus achieving the radon replenishment function. Simultaneously, the control center collects radon concentration signal data within the radon chamber for verification or experimental data acquisition to determine the radon replenishment time.

[0054] The technical solution provided by this invention establishes an independent radon gas buffer storage chamber, i.e., a radon storage tank. When the radon chamber does not require radon replenishment, both the three-way valve and the extraction pump are closed, and the radon gas circulates within the storage tank to achieve radioactive balance. When the radon chamber requires radon replenishment, both the three-way valve and the extraction pump are opened, connecting the storage tank to the radon chamber, and the extraction pump draws the radon gas from the storage tank into the radon chamber, thus achieving the radon replenishment function. This achieves closed-loop circulation and precise scheduling of radon gas within the system, enabling dynamic control of the radon concentration in the radon chamber. The technical solution provided by this invention completely encloses the radon gas generated by the radon source within the system for recycling, eliminating environmental pollution and health risks from radioactive waste gas emissions while maximizing the utilization rate of the radon source.

[0055] Figure 2 The flowchart illustrates a method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber according to an embodiment of the present invention. This method is implemented using an environmentally friendly and energy-saving radon chamber provided in any embodiment of the present invention. See [link / reference]. Figure 2 The method includes:

[0056] S110. Obtain the initial radon concentration in the radon storage tank and the initial radon concentration in the radon chamber.

[0057] Specifically, the control center acquires the actual radon concentration signals inside the radon storage tank and inside the radon chamber measured by the first radon measuring instrument. After preprocessing the actual radon concentration signals inside the radon storage tank and inside the radon chamber, the initial radon concentration inside the radon storage tank and the initial radon concentration inside the radon chamber are obtained.

[0058] S120. Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, calculate the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber, and determine the time required for radon replenishment. Then, open the three-way valve and the air pump to replenish radon according to the required time.

[0059] The preset parameters include: target concentration, permissible error, radon storage tank volume, radon chamber volume, decay constant, radon release rate, and pump exchange rate. The target concentration is preset based on verification or experimental data. The permissible error is preset according to actual needs, generally set to ±1%. The radon storage tank volume, radon chamber volume, radon release rate, and pump exchange rate can all be preset according to factory parameters. The physical decay constant is fixed, while decay constants due to leakage, adsorption, etc., can be preset based on empirical values ​​or determined through experimental data.

[0060] Specifically, by substituting the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters into a system of first-order linear differential equations, the theoretical radon activity in the storage tank and chamber is numerically solved over time. This determines the time required for the radon chamber concentration to rise from its initial value to the target upper limit; this time is the time required for radon replenishment. Calculating the radon replenishment time allows for precise control of the pump's start and stop times, ensuring that the initial radon concentration in the radon chamber is quickly replenished to the target upper limit, while avoiding excessive or insufficient radon gas. This meets the precise concentration requirements of experiments / tests and reduces system energy consumption.

[0061] S130. When the theoretical radon activity in the radon chamber reaches the upper limit of the target concentration, close the three-way valve and the air pump to enter the dynamic control stage. The dynamic control stage includes: when the theoretical radon activity in the radon chamber drops to the lower limit of the target concentration, reopen the three-way valve and the air pump to replenish the theoretical radon activity in the radon chamber to the upper limit of the target concentration, so as to achieve dynamic control.

[0062] The upper and lower limits of the target concentration are obtained by adding or subtracting the allowable error from the target concentration.

[0063] The technical solution provided by this invention calculates the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, and determines the time required for radon replenishment. A three-way valve and a vacuum pump are then opened to replenish radon according to the required replenishment time. When the theoretical radon activity in the radon chamber reaches the upper limit of the target concentration, the three-way valve and the vacuum pump are closed. When the theoretical radon activity in the radon chamber drops to the lower limit of the target concentration, the three-way valve and the vacuum pump are reopened to replenish the theoretical radon activity in the radon chamber to the upper limit of the target concentration, thus achieving dynamic control. The technical solution provided by this invention completely encloses the radon gas generated by the radon source within the system for recycling, eliminating environmental pollution and health risks from radioactive waste gas emissions while maximizing the utilization rate of the radon source.

[0064] Figure 3 This is a flowchart illustrating another environmentally friendly and energy-saving radon concentration control method for a radon chamber, provided by an embodiment of the present invention. This embodiment further refines the aforementioned embodiments. See also... Figure 3 Optionally, after step S120, the method further includes:

[0065] S210. When the initial radon concentration in the radon chamber reaches the upper limit of the target concentration, close the three-way valve and the air pump to enter the dynamic control stage.

[0066] Optionally, after step S130, the method further includes:

[0067] S220. Determine whether to adjust the target concentration; if yes, proceed to S230; if no, proceed to S240.

[0068] S230. Reset the target concentration and execute step S110.

[0069] S240: Determine whether to end dynamic control; if yes, end; if no, execute S130.

[0070] In some other embodiments, step S120 may optionally include:

[0071] Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated by solving a first-order differential equation, and the time required for radon replenishment is determined.

[0072] The first-order differential equation is as follows:

[0073] ;

[0074] In the formula, in the formula, The initial radon activity in the radon storage tank. The initial radon activity in the radon chamber; The volume of the radon storage tank. The volume of the radon chamber. It is the sum of the physical decay constant of radon gas and the decay constants of the radon chamber, radon storage tank, extraction pump, and connecting pipelines caused by leakage and adsorption factors. This refers to the air exchange rate of the air pump. The radon release rate.

[0075] Specifically, by solving the above system of first-order differential equations, the following formula is obtained. This formula is then used to calculate the theoretical radon activity inside the radon storage tank and the theoretical radon activity inside the radon chamber, and to determine the time required for radon replenishment:

[0076] In the formula, Let be the theoretical radon activity in the radon storage tank at time t. Radon activity at which the radon storage tank reaches radioactive equilibrium. Indicates time, The volume of the radon storage tank. , It is a constant. It is the sum of the physical decay constant of radon gas and the decay constants of the radon chamber, radon storage tank, extraction pump, and connecting pipelines caused by leakage and adsorption factors. This refers to the air exchange rate of the air pump. It is the sum of the reciprocals of the volume of the radon storage tank and the volume of the radon chamber.

[0077] In the formula, Let be the theoretical radon activity in the room at time t. The radon activity at which the radon chamber reaches radioactive equilibrium. This represents the volume of the radon chamber.

[0078] The sum of the reciprocals of the radon storage tank volume and the radon chamber volume satisfies the following relationship:

[0079] ;

[0080] The radon activity when the radon storage tank reaches radioactive equilibrium is calculated using the following formula:

[0081] In the formula, Radon release rate;

[0082] Radon activity at radioactive equilibrium in a radon chamber is calculated using the following formula:

[0083] ;

[0084] constant , Calculate using the following formula:

[0085] In the formula, The initial radon activity in the radon storage tank. The initial radon activity in the radon chamber;

[0086] .

[0087] The following specific embodiment illustrates a method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber provided by this invention.

[0088] Let the activity of the gaseous or solid radon source (Ra-226) be... The radon release rate of this radon source Radon source activity It is directly proportional. For radon sources with a half-life as long as 1600 years, its activity can be considered constant, assuming the radon release rate is constant. Keep it constant.

[0089] Connecting a gas-flow radon source to a radon storage tank, or placing a stationary radon source into the radon storage tank, will increase the radon activity in the storage tank. The changes over time are as follows:

[0090] ; (1)

[0091] in, The initial radon activity in the radon storage tank. The physical decay constant of radon gas. This represents the decay constant of radon storage tanks and chambers due to factors such as leakage and adsorption.

[0092] In previous methods for controlling radon concentration in radon chambers, a vacuum pump was typically used to connect the radon chamber to the radon source to adjust the radon concentration inside. In this method, the radon storage tank is used as a secondary radon source. The vacuum pump's air exchange rate is assumed to be... (m³ / s), then the theoretical radon activity in the radon storage tank at time t is... Theoretical radon activity in the radon chamber at time t The changes over time are shown below:

[0093] ; (2)

[0094] ; (3)

[0095] in, and These refer to the volume of the radon storage tank and the volume of the radon chamber, respectively. The sum of the physical decay constant of radon gas and the decay constants of the radon chamber, radon storage tank, extraction pump, and connecting pipelines due to leakage and adsorption factors is greater than the physical decay constant of radon gas. .

[0096] Therefore, solving the first-order linear differential equations (2) and (3) yields the theoretical radon activity in the radon storage tank at time t. Theoretical radon activity in the radon chamber at time t as follows:

[0097] ; (4)

[0098] ; (5)

[0099] in, This is the sum of the reciprocals of the volume of the radon storage tank and the volume of the radon chamber. Radon activity at which the radon storage tank reaches radioactive equilibrium. The radon activity at which the radon chamber reaches radioactive equilibrium. and It is a constant, and its expression is as follows:

[0100] ; (6)

[0101] , ; (7)

[0102] , ; (8)

[0103] To achieve the target concentration required for the radon chamber, the radon release rate should meet the following conditions:

[0104] In equation (9), This represents the minimum radon release rate.

[0105] When adding radon to the radon chamber, it is necessary to control the initial radon concentration inside the chamber from... Replenish radon to the target concentration And the time required It should be calculated from equation (5), but as a transcendental equation, equation (5) cannot be solved analytically. Therefore, in radon chamber control, the radon supplementation time can only be calculated by numerically solving this equation through the system. And control the start and stop of the air pump.

[0106] Without supplying radon gas to the radon chamber, the air exchange rate of the extraction pump is... At this time, the radon storage tank and the radon chamber do not exchange gases. The radon gas in the radon storage tank is in long-term equilibrium with the radon source according to formula (1), and the radon gas in the radon chamber decays and leaks naturally.

[0107] When replenishing radon to the radon chamber, the exhaust pump is started, with the pump's air exchange rate being [missing information]. Gas exchange occurs in the radon storage tank, which undergoes multiple processes including radon evolution, natural decay, radon replenishment in the radon chamber, adsorption, and leakage. The change in the theoretical activity of the radon chamber is shown in equation (5), and the replenishment time is... From the initial concentration of radon in the chamber With target concentration The decision is that once the radon chamber reaches the target concentration, the control center will automatically shut down the extraction pump, thus reducing the pump's air exchange rate. The radon concentration in the radon chamber decays naturally. When the difference between the radon concentration and the target concentration exceeds the allowable error, the vacuum pump is turned on to adjust it back to the upper limit of the target concentration, thereby achieving dynamic adjustment of the radon concentration in the chamber.

[0108] For example, given known initialization conditions, the radon excretion rate is... Bq / s, radon storage tank volume Radon chamber volume Air exchange rate of the air pump Radon physical decay constant Leakage and adsorption rate decay constant Initial concentration of radon in the room Bq / m 3 Target concentration Bq / m 3 The allowable error is 1%.

[0109] In practical applications, the radon source and the radon storage tank are constantly... The radon molecules are interconnected and reach radioactive equilibrium after 5 to 10 half-lives. The initial radon concentration in the radon storage tank can be determined by equation (1). Bq / m 3 Radon supplementation control will be initiated after 30 days. The constant term will be calculated. and Subsequently, the control center numerically solved equations (4) and (5) to calculate the initial radon concentration in the chamber. Replenish radon to the target concentration The time required to reach the upper limit is 17.6 minutes, and the initial radon concentration in the radon storage tank is from... Bq / m 3 Down to Bq / m 3 At this point, radon replenishment in the radon chamber is complete, and the system enters the dynamic stabilization phase. The three-way valve is closed, and the radon storage tank circulates, allowing for natural decay and leakage within the radon chamber. After 2 hours and 31 minutes, the theoretical radon concentration in the chamber drops to the lower limit of the target concentration. Bq / m 3 The theoretical radon concentration inside the radon storage tank rose to Bq / m 3At this point, the three-way valve is opened. After 25.3 seconds, the radon storage tank can replenish the theoretical radon concentration in the radon chamber to the upper limit of the target concentration. This dynamic adjustment, repeated in a cycle, can achieve relative stability of the radon concentration in the radon chamber. This part of the application is as follows... Figure 4 As shown, Figure 4 This is a schematic diagram of radon replenishment and dynamic stabilization control in the radon chamber after the radon storage tank is balanced, provided in an embodiment of the present invention.

[0110] In the above applications, radon is replenished after radioactivity equilibrium is reached in the radon storage tank. Its advantages are that radon replenishment is rapid and the radon replenishment time is relatively constant during dynamic stabilization. In practical applications, radon replenishment can still be carried out even if equilibrium is not reached.

[0111] Assuming the three-way valve is opened on the third day to perform radon replenishment, the result would be as follows: Figure 5 As shown, Figure 5 This is a schematic diagram illustrating radon replenishment and dynamic stabilization when the radon storage tank is unbalanced, as provided in an embodiment of the present invention. The time required for the radon concentration in the radon chamber to be replenished to the target upper limit is 57.7 minutes, followed by a dynamic stabilization phase. During this phase, the time to decay to the target lower limit is 2 hours and 31 minutes, and the dynamic radon replenishment time is adjusted from 25 seconds to 2 minutes, determined by the radon concentration in the radon storage tank. The radon concentration in the radon storage tank increases in a sawtooth pattern and gradually reaches radioactive equilibrium.

[0112] To ensure the radon concentration in the radon chamber meets the required standard, a minimum limit exists for the radon release rate under radioactive equilibrium conditions. This limit can be calculated using equation (9). Bq / m 3 The minimum required radon release rate is:

[0113] ;

[0114] The corresponding radon source (Ra-226) activity is approximately 43 kBq, significantly reducing the required radon source activity. Based on this release rate, when the radon storage tank reaches equilibrium, the time required for the radon chamber to replenish from the background concentration to the target concentration is 2 hours and 34 minutes. Compared to the aforementioned calculation, this time is longer, but still shorter than the traditional radon replenishment method, thus shortening the radon replenishment time.

[0115] The technical solution provided by this invention stores radon gas generated by a radon source in a radon storage tank by adopting the principle of radioactivity balance. The radon storage tank is used as a secondary radon source for radon gas circulation and regulation with the radon chamber. This fully utilizes radioactive waste gas to reduce radon source activity and shorten adjustment time, making radon concentration control more environmentally friendly and economical.

[0116] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0117] At least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to execute the radon concentration control method for the environmentally friendly and energy-saving radon chamber provided in any embodiment of the present invention.

[0118] Figure 6 This is a schematic diagram of an electronic device for a method of controlling radon concentration in an environmentally friendly and energy-saving radon chamber, provided as an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0119] like Figure 6 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 and a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, the ROM 12, and the RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0120] Multiple components in electronic device 10 are connected to input / output I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of monitors, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0121] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as a method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber.

[0122] In some embodiments, a method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via read-only memory ROM 12 and / or communication unit 19. When the computer program is loaded into random access memory RAM 13 and executed by processor 11, one or more steps of the method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber described above can be performed. Alternatively, in other embodiments, processor 11 can be configured in any other suitable manner to perform the method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber.

[0123] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transferring data and instructions to the storage system, the at least one input device, and the at least one output device.

[0124] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0125] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0126] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device for displaying information to a user; and a keyboard and pointing device through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with a user; for example, feedback provided to the user can be any form of sensory feedback; and input from the user can be received in any form.

[0127] The systems and technologies described herein can be implemented in computing systems that include backend components, middleware components, or frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium. Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0128] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0129] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0130] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An environmentally friendly and energy-saving radon chamber, characterized in that, It includes a radon source, radon storage tank, pipe interfaces, three-way valve, air pump, control center, radon chamber, fan, first radon measuring instrument and second radon measuring instrument; The radon source is connected to the radon storage tank, which is connected to the three-way valve via the pipe interface. The three-way valve is connected to the air extraction pump, which is connected to the radon chamber. The fan is installed on the radon chamber. The first radon measuring instrument and the second radon measuring instrument are respectively connected to the radon chamber. The control center is connected to the three-way valve, the air extraction pump, and the first radon measuring instrument.

2. The environmentally friendly and energy-saving radon chamber according to claim 1, characterized in that, The radon source is a solid radon source or a gaseous radon source, and the radon gas in the radon storage tank reaches radioactive equilibrium after 5 to 10 half-lives.

3. The environmentally friendly and energy-saving radon chamber according to claim 1, characterized in that, When the radon chamber does not require radon replenishment, both the three-way valve and the air pump are closed, and the radon gas circulates within the radon storage tank. When the radon chamber requires radon replenishment, both the three-way valve and the air pump are open, connecting the radon storage tank to the radon chamber and supplying radon gas to it.

4. A method for controlling radon concentration in an environmentally friendly and energy-saving radon chamber, characterized in that, The method, implemented by the environmentally friendly and energy-saving radon chamber according to any one of claims 1-3, comprises: Obtain the initial radon concentration inside the radon storage tank and the initial radon concentration inside the radon chamber; Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated, and the time required for radon replenishment is determined. The three-way valve and the vacuum pump are then activated to replenish radon according to the required replenishment time. The preset parameters include: target concentration, allowable error, radon storage tank volume, radon chamber volume, decay constant, radon release rate, and vacuum pump exchange rate. When the theoretical radon activity in the radon chamber reaches the upper limit of the target concentration, the three-way valve and the vacuum pump are closed, and the dynamic control phase begins. The dynamic control phase includes: when the theoretical radon activity in the radon chamber drops to the lower limit of the target concentration, the three-way valve and the vacuum pump are reopened to replenish the theoretical radon activity in the radon chamber to the upper limit of the target concentration, so as to achieve dynamic control. The upper and lower limits of the target concentration are obtained by adding or subtracting the allowable error from the target concentration.

5. The method according to claim 4, characterized in that, After replenishing radon by opening the three-way valve and the vacuum pump according to the required radon replenishment time, the process also includes: When the initial radon concentration in the radon chamber reaches the upper limit of the target concentration, the three-way valve and the air pump are shut off, and the dynamic control phase begins.

6. The method according to claim 4, characterized in that, After entering the dynamic control phase, it also includes: If the target concentration needs to be adjusted, the target concentration is preset again, and the steps of obtaining the initial radon concentration in the radon storage tank and the initial radon concentration in the radon chamber are executed.

7. The method according to claim 4, characterized in that, Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated, and the time required for radon replenishment is determined, including: Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated by solving a first-order differential equation, and the time required for radon replenishment is determined.

8. The method according to claim 7, characterized in that, Based on the initial radon concentration in the radon storage tank, the initial radon concentration in the radon chamber, and preset parameters, the theoretical radon activity in the radon storage tank and the theoretical radon activity in the radon chamber are calculated by solving a first-order differential equation, and the time required for radon replenishment is determined, including: The theoretical radon activity inside the radon storage tank and the theoretical radon activity inside the radon chamber are calculated using the following formulas to determine the time required for radon replenishment: In the formula, Let be the theoretical radon activity in the radon storage tank at time t. Radon activity at which the radon storage tank reaches radioactive equilibrium. Indicates time, The volume of the radon storage tank. , It is a constant. It is the sum of the physical decay constant of radon gas and the decay constants of the radon chamber, radon storage tank, extraction pump, and connecting pipelines caused by leakage and adsorption factors. This refers to the air exchange rate of the air pump. It is the sum of the reciprocals of the volume of the radon storage tank and the volume of the radon chamber; In the formula, Let be the theoretical radon activity in the room at time t. The radon activity at which the radon chamber reaches radioactive equilibrium. This represents the volume of the radon chamber.

9. The method according to claim 8, characterized in that, The sum of the reciprocals of the volume of the radon storage tank and the volume of the radon chamber satisfies the following relationship: ； The radon activity when the radon storage tank reaches radioactive equilibrium is calculated using the following formula: In the formula, Radon release rate; Radon activity at which the radon chamber reaches radioactive equilibrium is calculated using the following formula: ； constant , Calculate using the following formula: In the formula, The initial radon activity in the radon storage tank. The initial radon activity in the radon chamber; 。 10. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the radon concentration control method for the environmentally friendly and energy-saving radon chamber according to any one of claims 4-9.

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