A method and system for intelligent temperature control of explosion-proof air conditioners

Abstract

This invention discloses an intelligent temperature control method and system for explosion-proof air conditioners, relating to the field of energy recovery and utilization technology. Its key technical points are: acquiring the heat and moisture recovery operation records of the explosion-proof air conditioner, writing them into continuous sectors according to the angle position of the heat and moisture energy recovery rotor, and generating sector operation records; calculating the sector exposure based on the sector operation records, and generating sector exposure records by combining the sector dwell process and exhaust air humidity changes; screening baseline sectors along the rotor rotation direction, forming detection thresholds and determining the sectors to be detected, and generating bypass detection conditions including detection speed and bypass discharge status; according to the bypass detection conditions, causing the fresh air side detection airflow corresponding to the sector to be detected to enter the bypass discharge path, comparing its concentration response and dew point response with the baseline sector response, generating a residual release marker, and controlling bypass maintenance, normal heat and moisture recovery opening, and the linkage adjustment of the bypass valve, dehumidification unit, and reheat unit accordingly.

Description

Technical Field

[0001] This invention relates to the field of energy recovery and utilization technology, specifically to an intelligent temperature control method and system for explosion-proof air conditioners. Background Technology

[0002] Explosion-proof air conditioners are commonly used in production areas such as lithium battery electrolyte weighing rooms, which require simultaneous explosion-proof ventilation, temperature stability, and humidity control. Taking an electrolyte weighing room under high humidity conditions in summer as an example, the outdoor fresh air has a high moisture content, while the indoor air needs to maintain a low dew point to reduce the probability of electrolyte moisture absorption and condensation on equipment surfaces. In such areas, the heat and humidity load generated by personnel operations during weighing, dispensing, and sealing processes will continue. Opening weighing containers and short-term cleaning will also cause the concentration of combustible volatile organic compounds to increase in stages. In order to balance safe ventilation and energy consumption control, a high proportion of fresh air replacement is usually adopted in engineering, and heat and humidity energy recovery components are installed between the fresh air side and the exhaust air side of the explosion-proof air conditioner. This allows the exhaust air, which has already undergone cooling and dehumidification, to pre-treat the high-humidity fresh air, thereby reducing the continuous load on the surface cooling coil, compressor, and reheat unit. Existing explosion-proof air conditioners can usually combine the concentration of combustible gases in the duct, indoor temperature and humidity, supply and return air status, and the heat and humidity difference between the fresh and exhaust air to perform linkage control of cooling, dehumidification, reheating, bypass, and energy recovery.

[0003] During the aforementioned operation, a decrease in the concentration of combustible volatile organic compounds at the current detection point does not necessarily indicate that the risk release within the heat and humidity energy recovery component has been completed. For recovery cores with moisture-absorbing coatings or rotary heat recovery components, volatile components entering the exhaust side in the previous weighing cycle may enter the channels, coating surface, or local areas of the rotor along with moisture. When the system reduces the rotor speed or suspends recovery during the concentration increase phase, some components will remain in the recovery medium along with the residence sector. When the concentration detection value returns to normal, if the control system directly resumes heat and humidity recovery according to the fresh air dehumidification load, this residence area may experience concentrated release when switching to the fresh air side, causing a short-term risk pulse on the supply air side. This phenomenon differs from ordinary cross-leakage. Its risk sources are not only affected by the current pressure difference and sealing status, but also related to the exhaust concentration of the previous operating cycle, the moisture content of the recovery medium, the residence time of the sector, and the recovery speed. Therefore, in explosion-proof constant temperature and humidity regulation, how to identify the historical residual state of the recovery medium and determine the permission for energy recovery recovery accordingly is a technical problem that still needs further processing in the energy recovery control of explosion-proof air conditioning. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: A method for intelligent temperature control and regulation of an explosion-proof air conditioner, comprising: Obtain the heat and humidity recovery operation record of the explosion-proof air conditioner. The heat and humidity recovery operation record includes the process of the concentration of combustible volatile organic compounds on the exhaust side exceeding the limit, the rotor angle process, the heat and humidity process of fresh and exhaust air, and the indoor dew point process. Write the heat and humidity recovery operation record into a continuous sector according to the angle position of the heat and humidity energy recovery rotor to generate a sector operation record. The exposure amount of each sector is calculated based on the sector operation record. The process of exceeding the concentration of combustible volatile organic compounds on the exhaust side is written into the corresponding sector. The exposure amount is then corrected according to the sector dwell process and the change in exhaust humidity to generate a sector exposure record that records the sector exposure value. The sector exposure records are processed along the rotation direction of the heat and moisture energy recovery wheel, and the baseline sectors are screened. The fluctuation range of the sector exposure value of the baseline sectors is used to form the detection threshold. The sectors that are about to switch to the fresh air side and whose sector exposure value reaches the detection threshold are recorded as the sectors to be detected. The bypass detection conditions, including the detection speed and bypass discharge status, are generated based on the heat and moisture process of the fresh and exhaust air and the indoor dew point process. Drive the heat and moisture recovery impeller and control the bypass valve according to the bypass detection conditions, so that the fresh air detection airflow passing through the sector to be detected enters the bypass discharge path. Compare the concentration response and dew point response of the sector to be detected with the concentration response and dew point response of the baseline sector to generate a residual release marker. Maintain the bypass discharge path when the residual release marker exists, and open normal heat and moisture recovery when the residual release marker is removed, and output linkage adjustment commands acting on the bypass valve, dehumidification unit and reheat unit.

[0005] Furthermore, obtain the heat and humidity recovery operation records of the explosion-proof air conditioner, including: The exhaust side volatile organic compound (VOC) detection value is compared with the environmental background concentration of the same dimension to generate the process where the exhaust side VOC concentration exceeds the set range. The environmental background concentration is taken from the baseline historical exhaust side detection value when the exhaust volume is within the set operating range. The process of calibrating the angle detection signal of the heat and moisture energy recovery wheel at the zero position and generating the wheel angle is as follows: The fresh air and exhaust air heat and humidity process is generated based on the heat and humidity detection signals from the fresh air side and the exhaust air side, and the indoor dew point process is generated based on the indoor heat and humidity detection signals.

[0006] Furthermore, a sector execution record is generated, including: Divide the continuous sectors along the rotation direction of the heat and moisture energy recovery wheel, and use the wheel angle process as the writing basis to write the heat and moisture recovery operation record at the same writing moment into the continuous sector corresponding to the current angle position. If any of the following conditions are met: the rotor angle process has not completed zero-point calibration, or the direction of angle change is inconsistent with the rotation direction of the heat and moisture energy recovery rotor, writing to the continuous sector will stop, and the corresponding time segment will be recorded as an invalid angle segment. Write the sector number, write time, and record validity status into the record item of the corresponding consecutive sector to generate a sector operation record.

[0007] Furthermore, the process of exceeding the concentration of combustible volatile organic compounds on the exhaust side is written into the corresponding sector, including: Using sector number as the processing object, the operation record of the sector during the period when the sector is in the exhaust side angle range is extracted according to the rotor angle process. The exhaust side angle range is the angle range of contact between the sector and the exhaust side airflow in the heat and moisture energy recovery rotor. Extract valid running records with a valid state of normal writing, and read the amount of concentration exceeding the limit from the exhaust side corresponding to the valid running record during the process of exceeding the concentration of combustible volatile organic compounds; Valid operational records with concentration exceeding 0 are included in the exposure calculation for that sector. The sector exposure is calculated based on the concentration exceeding the limit and the duration of residence of that sector within the exhaust side angle range.

[0008] Furthermore, generating sector exposure records that record sector exposure values ​​includes: The dwell time ratio is formed based on the actual dwell time of the sector within the exhaust side angle range and the reference dwell time. The reference dwell time is the time it takes for the sector to pass through the exhaust side angle range at the rated speed. When the actual dwell time is not greater than the reference dwell time, the dwell time ratio is recorded as 1. The humidity content of the exhaust air is read during the heat and humidity process of the fresh exhaust air, and a humidity correction term is formed based on the deviation of the humidity content of the exhaust air relative to the baseline humidity content of the exhaust air. The baseline humidity content of the exhaust air is the humidity content of the exhaust air corresponding to the baseline historical exhaust air detection value used to form the environmental background concentration. A stay correction term is generated based on the stay ratio, and the sector exposure is adjusted according to the stay correction term and the humidity correction term to generate the sector exposure value, which is then written into the sector exposure record.

[0009] Furthermore, the formation of the baseline sector, detection threshold, and sector to be detected includes: Retrieve exposure records of sectors that were closed before the current time and have the same process mode, and form the minimum distinguishable exposure level based on the detection resolution limit of combustible volatile organic compounds and the baseline residence time; Exclude sector exposure records that are not closed in exposure calculation, have limited exposure calculation, or have actual stay duration that exceeds the stay ratio limit. Sectors whose sector exposure values ​​do not exceed the minimum distinguishable exposure amount are recorded as baseline sectors. The detection threshold is formed based on the fluctuation range of sector exposure values ​​in the baseline sector and the minimum distinguishable exposure level. The remaining angle from the leading edge of the sector to the fresh air inlet boundary along the rotation direction is determined based on the rotation angle process. When the remaining angle is not greater than the pre-trigger angle and the sector exposure value reaches the detection threshold, the corresponding sector is recorded as the sector to be detected. The pre-trigger angle is the advance angle required for the bypass exhaust path to be opened in advance.

[0010] Furthermore, the generation of bypass detection conditions includes: The pre-trigger angle is determined by the time required for the bypass valve to complete its action, the combustible volatile organic compound detection device to stabilize its response, and the controller to sample, combined with the current angular velocity of the rotor. The detection speed is generated based on the degree to which the sector exposure value of the sector to be detected exceeds the detection threshold. The detection speed is not lower than the minimum allowable speed of the heat and moisture energy recovery wheel, and not higher than the rated speed under the current process mode. The indoor dew point margin is formed based on the indoor dew point process, and the fresh air side dew point is formed based on the fresh and exhaust air heat and humidity process. When either the indoor dew point margin is lower than the dew point safety margin or the fresh air dew point is higher than the upper boundary of the indoor dew point, the fresh air detection airflow corresponding to the sector to be detected is discharged through the bypass discharge path. When the indoor dew point margin reaches the safe dew point margin and the fresh air dew point is not higher than the upper boundary of the indoor dew point, the bypass discharge state sequentially enters the pre-discharge state, the detection discharge state, and the maintenance discharge state.

[0011] Furthermore, generating residual release markers includes: Control the heat and moisture energy recovery rotor and bypass valve according to the bypass detection conditions, so that the fresh air detection airflow passing through the sector to be detected enters the bypass discharge path; Collect the detection values ​​of combustible volatile organic compounds and temperature and humidity values ​​in the bypass discharge path to form the concentration response and dew point response of the sector to be detected; The concentration response and dew point response of the sector to be detected were compared with the concentration response and dew point response of the baseline sector, respectively. When the concentration response of the sector to be detected is higher than that of the baseline sector, a residual release marker is generated; When a residual release marker is present and the dew point response of the sector to be detected is higher than that of the baseline sector, the dew point response is recorded in the residual release marker.

[0012] Furthermore, maintaining the bypass discharge path, enabling normal heat and humidity recovery, and outputting linkage control commands include: When the residual release marker is present, the control bypass valve keeps the bypass discharge path open; The residual release marker is removed when the concentration response of the sector to be detected is not higher than that of the baseline sector, the dew point response of the sector to be detected is not higher than that of the baseline sector, and the indoor dew point margin reaches the safe dew point margin. When the residual release marker is removed and the bypass valve position feedback is valid, control the bypass valve to switch to the normal heat and moisture recovery path; Based on the presence of residual release markers, a bypass valve adjustment command is generated. Based on the state that the dew point response of the sector to be detected is higher than that of the baseline sector, a dehumidification unit adjustment command and a reheat unit adjustment command are generated.

[0013] An explosion-proof air conditioning intelligent temperature control system includes: The sector writing module acquires the heat and humidity recovery operation records of the explosion-proof air conditioner. The heat and humidity recovery operation records include the process of the concentration of combustible volatile organic compounds on the exhaust side exceeding the limit, the rotor angle process, the heat and humidity process of the fresh and exhaust air, and the indoor dew point process. The heat and humidity recovery operation records are written into continuous sectors according to the angle position of the heat and humidity energy recovery rotor to generate sector operation records. The exposure record module calculates the exposure amount of each sector based on the sector operation record, writes the process of the exhaust side combustible volatile organic compound concentration exceeding the limit into the corresponding sector, and then corrects the exposure amount according to the sector dwell process and the change of exhaust humidity to generate a sector exposure record that records the sector exposure value. The bypass condition module processes sector exposure records along the rotation direction of the heat and moisture energy recovery wheel, filters baseline sectors, forms a detection threshold based on the fluctuation range of sector exposure values ​​of the baseline sectors, and records sectors that are about to switch to the fresh air side and whose sector exposure values ​​reach the detection threshold as sectors to be detected; it generates bypass detection conditions including detection speed and bypass discharge status based on the heat and moisture process of fresh and exhaust air and the indoor dew point process. The linkage control module drives the heat and moisture energy recovery rotor and controls the bypass valve according to the bypass detection conditions, so that the fresh air detection airflow passing through the sector to be detected enters the bypass discharge path. It compares the concentration response and dew point response of the sector to be detected with the concentration response and dew point response of the baseline sector to generate a residual release marker. When the residual release marker exists, the bypass discharge path is maintained. When the residual release marker is removed, normal heat and moisture recovery is opened, and linkage control commands acting on the bypass valve, dehumidification unit and reheat unit are output.

[0014] This invention provides an intelligent temperature control method and system for explosion-proof air conditioners, which has the following beneficial effects: 1. This invention divides the heat and moisture energy recovery impeller into continuous sectors according to its angular position, and writes the concentration exceeding process, impeller angle process, and heat and moisture state into the corresponding sectors, thereby forming a sector exposure record that can characterize the historical exposure state of a local area of ​​the impeller. Through this process, the control object changes from a general air duct detection point to a specific sector that passes through the exhaust side and is about to enter the fresh air side. It can identify the state where the current detection concentration has returned to normal, but the recovered medium may still retain volatile components locally, thereby reducing the possibility of short-term risk pulses on the supply air side caused by directly restoring heat and moisture recovery.

[0015] 2. This invention further uses the exposure value fluctuation of the baseline sector to form a detection threshold, and combines the rotation direction of the rotor to determine the sector to be detected that is about to enter the fresh air side. This makes the energy recovery permission correspond to the historical exposure of the sector, its current position, and the timing of the fresh air side entry. This method is different from the control logic that simply performs bypass switching based on indoor temperature and humidity, the heat and humidity difference between fresh and exhaust air, or the current gas concentration. It can pre-form bypass detection conditions before the sector to be detected enters the normal air supply path, so that the local rotor area that may carry the risk of residual release is first verified through the bypass exhaust path, which improves the pertinence and timing reliability of the heat and humidity recovery judgment.

[0016] 3. During the bypass detection process, this invention compares the concentration and dew point responses of the sector to be detected with the baseline sector responses, and uses a residual release marker to control the bypass maintenance, normal heat and moisture recovery opening, and the linkage adjustment of the bypass valve, dehumidification unit, and reheat unit. As a result, the system can prevent high-risk detection airflow from entering the normal air supply path before the residual release is confirmed to be released, and restore heat and moisture recovery after the release is confirmed. This not only suppresses the explosion risk caused by historical residues of the recovered medium, but also avoids unnecessary increases in dehumidification, cooling, and reheat loads caused by long-term shutdown of heat and moisture recovery. Attached Figure Description

[0017] Figure 1 This is a flowchart of the method of the present invention; Figure 2 This is a system framework diagram of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1 This embodiment provides an intelligent temperature control method for explosion-proof air conditioners, including the following specific steps: S1 includes: acquiring the heat and humidity recovery operation record of the explosion-proof air conditioner, writing the heat and humidity recovery operation record into a continuous sector according to the angle position of the heat and humidity energy recovery rotor, generating a sector operation record, and using the sector operation record as the input object for S2 to calculate the sector exposure value.

[0020] This embodiment uses an explosion-proof constant temperature and humidity air conditioner in a lithium battery electrolyte weighing room as the application scenario. When the weighing room is operating under high humidity conditions in summer, opening, dispensing, and sealing of the weighing containers will cause the volatile organic compound (VOC) detection value on the exhaust side to rise in a local period. During this period, the local area of ​​the heat and humidity energy recovery wheel will enter the transition sealing area as the wheel rotates after passing the exhaust side, and then enter the fresh air side after continuing to rotate. Based on this operation process, S1 synchronously writes the process of the VOC concentration exceeding the exhaust side and the wheel angle process into the continuous sector, so that subsequent steps can continue to process the local area of ​​the wheel.

[0021] The heat and humidity recovery operation record includes the process of the exhaust side combustible volatile organic compound concentration exceeding the limit, the impeller angle process, the heat and humidity process of fresh and exhaust air, and the indoor dew point process.

[0022] The process of exceeding the concentration of combustible volatile organic compounds on the exhaust side is formed by comparing the detected value of combustible volatile organic compounds on the exhaust side with the background concentration of the same dimension. In the same embodiment, the detected value of combustible volatile organic compounds on the exhaust side and the background concentration of the environment are uniformly expressed in one of the dimensions of lower explosive limit percentage or volume fraction concentration. When the explosion-proof air conditioning control system uses the lower explosive limit percentage as the safety monitoring quantity, both the detected value of combustible volatile organic compounds on the exhaust side and the background concentration of the environment are expressed in the lower explosive limit percentage.

[0023] When the concentration of combustible volatile organic compounds (VOCs) on the exhaust side exceeds the limit, the VOCs detection value on the exhaust side that has reached the current writing time and is in an effective state is compared with the ambient background concentration. If the current detection value is higher than the ambient background concentration, the excess amount and the corresponding writing time are recorded. If the current detection value is not higher than the ambient background concentration, the excess amount at the writing time is recorded as 0. If any of the following conditions are met: the VOCs detection value on the exhaust side is not updated within the upper limit of the corresponding detection cycle, the detection device is in a fault state, or the detection value exceeds the effective range of the detection device, an effective concentration excess process is not formed, and the effective state of the record at the corresponding writing time is recorded as invalid gas detection.

[0024] The background concentration is taken from the baseline historical exhaust side detection value when the exhaust volume is within the operating set range. For constant air volume explosion-proof air conditioners, the operating set range is determined according to 90% to 110% of the design exhaust volume. For variable air volume explosion-proof air conditioners, the operating set range is determined according to 90% to 110% of the exhaust volume set value under the current process mode, and corresponds to the current exhaust valve opening and exhaust fan frequency. The current process mode is determined by the operating status in weighing, dispensing, sealing and cleaning, and is written by the mode setting signal of the explosion-proof air conditioner control system.

[0025] The baseline historical exhaust side detection value is taken from historical operating segments where the weighing container is closed, no opening and dispensing operation is performed, the exhaust volume is within the operating set range, the indoor dew point is within the control dead zone, and the exhaust side combustible volatile organic compound detection value is within the allowable deviation band of the previous effective environmental background concentration. The end time of the historical operating segment is earlier than the current writing time. The control dead zone is formed by the constant humidity control accuracy of the explosion-proof air conditioner and the indoor dew point detection error, preferably 0.5℃ to 1.5℃ above and below the target dew point. The allowable deviation band is formed by the indication error of the combustible volatile organic compound detection device on the exhaust side and the sampling resolution of the controller. Its half-width is not less than the larger of the indication error and the sampling resolution, and not more than 3 times the larger of the two.

[0026] The duration of the historical operating segment shall not be less than the time required for the heat and humidity energy recovery rotor to complete one full rotation, and each consecutive sector shall have a valid write time within one full rotation. The valid write time refers to the write time when the rotor angle process has completed zero-position calibration, the exhaust side combustible volatile organic compound detection value is in a valid state, the heat and humidity detection signal is in a valid state, the exhaust volume is within the operating set range, and the sampling synchronization meets the upper limit of the corresponding detection cycle. If any of the following conditions are met in the historical operating segment: invalid angle segment, invalid heat and humidity detection segment, invalid gas detection segment, or exhaust volume exceeding the operating set range, the historical operating segment shall not be used to update the environmental background concentration.

[0027] When the initial operation has not yet established a baseline historical exhaust side detection value, the environmental background concentration adopts the initial background record formed during the equipment commissioning phase under non-weighing operation conditions. The initial background record is formed after the supply fan, exhaust fan, and heat and moisture energy recovery wheel are all in a stable operating state, and covers one complete rotation of the heat and moisture energy recovery wheel. When the historical operation segment does not cover one complete rotation or does not enable any state in the effective writing time of each consecutive sector to be established, the update of the environmental background concentration is suspended, and the previous effective environmental background concentration is used.

[0028] The rotor angle process is generated by the angle detection signal of the heat and moisture energy recovery rotor. The angle detection signal is obtained by the rotor shaft end encoder, zero position sensor and speed feedback signal with zero position pulse. In specific implementation, the angle detection signal of the heat and moisture energy recovery rotor is calibrated according to the zero position to generate the rotor angle process. The zero position is preferably set at the boundary where the heat and moisture energy recovery rotor enters the transition sealing zone from the exhaust side. After the same equipment is installed, the zero position remains unchanged.

[0029] When the equipment starts up, resumes operation after the heat and moisture recovery wheel stops, or resumes operation after the angle detection signal is interrupted, zero-position calibration is performed first, and then the heat and moisture recovery operation record is written to the continuous sector. After the zero-position calibration is completed, the zero position is used as the angle starting point, and an angle coordinate from 0° to 360° is established according to the rotation direction of the heat and moisture recovery wheel. The circumference angle range is divided into equal angle intervals according to the number of continuous sectors. Each equal angle interval corresponds to the continuous sector number in sequence according to the rotation direction. The equal angle interval into which the current wheel angle falls corresponds to a continuous sector, and this continuous sector is used as the writing object at the current writing time. When the current wheel angle is at the boundary of the adjacent equal angle interval, the next continuous sector is written according to the rotation direction.

[0030] The fresh air and exhaust air heat and humidity process is generated by the heat and humidity detection signals from the fresh air side and the exhaust air side, and the indoor dew point process is generated by the indoor heat and humidity detection signal. Heat and humidity detection devices are set on the fresh air side, the exhaust air side and the indoor side respectively to collect the temperature detection value and humidity detection value at the corresponding location. The explosion-proof air conditioning control system performs air state conversion based on the temperature detection value and humidity detection value to obtain the fresh air and exhaust air heat and humidity process and the indoor dew point process. S1 writes the fresh air and exhaust air heat and humidity process and the indoor dew point process along with the exhaust air side combustible volatile organic compound concentration exceeding process and the rotor angle process into the continuous sector.

[0031] After the heat and humidity recovery operation record is formed, continuous sectors are divided along the rotation direction of the heat and humidity energy recovery wheel. The number of continuous sectors is set according to the angle detection resolution of the heat and humidity energy recovery wheel, the wheel speed, and the controller sampling period, so that each continuous sector corresponds to at least one valid write time when the heat and humidity energy recovery wheel completes one full rotation. The number of continuous sectors is preferably 36 to 72, and the angle width of each continuous sector is not less than 5 times the angle width corresponding to the angle detection resolution. Before the start of the operation cycle, if the preset number of continuous sectors cannot ensure that each continuous sector corresponds to at least one valid write time in one full rotation, the number of continuous sectors is reduced until the valid write condition is met. Once the number of continuous sectors is determined, it remains unchanged within the same explosion-proof air conditioner operation cycle.

[0032] Using the rotor angle process as the basis for writing, the heat and humidity recovery operation records at the same writing moment are written to the continuous sectors corresponding to the current angle position. The same writing moment refers to the moment after synchronizing the detection values ​​of combustible volatile organic compounds on the exhaust side, the heat and humidity detection signals on the fresh air side, the heat and humidity detection signals on the exhaust side, and the indoor heat and humidity detection signals, based on the sampling moment of the rotor angle process. During real-time writing, only the detection values ​​that have arrived and are in a valid state before the writing moment are used. Detection values ​​that arrive later than the writing moment will not reverse the already formed sector operation records.

[0033] When the sampling periods of the various detection signals are inconsistent, the sampling time of the rotating wheel angle process is used as the unified writing time. For detection signals with a sampling period no greater than the sampling period of the rotating wheel angle process, the valid detection value closest to the unified writing time is selected. For heat and humidity detection signals with a sampling period greater than the sampling period of the rotating wheel angle process, the most recently arrived and valid heat and humidity detection value is used to write the unified writing time. The upper limit of the heat and humidity detection period is determined by the rated response time of the corresponding temperature and humidity detection device and the sampling period of the controller. When the sampling interval exceeds the upper limit of the heat and humidity detection period, the corresponding time segment is not written with a valid heat and humidity status, and the valid record status of the time segment is recorded as invalid heat and humidity detection.

[0034] When any of the following conditions are met: the rotor angle process has not completed zero-point calibration, or the direction of angle change is inconsistent with the rotation direction of the heat and moisture recovery rotor, writing to the continuous sector is stopped, and the corresponding time segment is recorded as an invalid angle segment. The direction of angle change is identified based on the rotor angle change at adjacent writing times. When the rotor angle moves from close to 360° to close to 0°, the direction of angle change is identified after expanding the cyclic coordinates from 0° to 360°. Normal zero-point jumps are not recorded as reverse changes. Invalid angle segments are not included in the sector exposure value calculation in S2. After the angle signal is restored, the rotor angle process is recalibrated according to the zero-point position before new heat and moisture recovery operation records are written to the continuous sector. The detection values ​​collected before recalibration are saved as the original operation data and are not written to the valid continuous sector.

[0035] When writing to consecutive sectors, the sector number, writing time, and record validity status are written to the record item of the corresponding consecutive sector to generate a sector operation record. The sector operation record also retains the heat and humidity recovery operation record written to the consecutive sector. The record validity status is used to distinguish between normal writing segments, angle invalid segments, heat and humidity detection invalid segments, and gas detection invalid segments. S2 calls the process of exhaust side combustible volatile organic compound concentration exceeding the limit, writing time, record validity status, and fresh exhaust heat and humidity process in the sector operation record to calculate the exposure amount of each sector. The exposure amount is then corrected according to the sector dwell process and exhaust humidity change to generate a sector exposure record that records the sector exposure value.

[0036] After S1 generates the sector operation record, S2 calculates the exposure amount of each sector based on the sector operation record, writes the process of the exhaust side combustible volatile organic compound concentration exceeding the limit into the corresponding sector, and then corrects the exposure amount according to the sector dwell process and the change of exhaust humidity to generate a sector exposure record that records the sector exposure value.

[0037] The sector operation records called by S2 include sector number, writing time, record validity status, process of exceeding the concentration of combustible volatile organic compounds on the exhaust side, rotor angle process, and fresh and exhaust heat and humidity process. Based on the sector number, writing time, and environmental background concentration formed by S1, S2 calculates the exposure amount of valid operation records under the same sector number.

[0038] For any given sector number, the sector operation record during the period when the sector is in the exhaust side angle interval is extracted according to the rotor angle process. The exhaust side angle interval is the angle range in which the sector in the heat and moisture energy recovery rotor contacts the exhaust side airflow. This angle range is jointly determined by the air duct partition structure of the heat and moisture energy recovery rotor, the position of the transition sealing area, and the zero-point calibration result, and does not include the transition sealing area. From entering the exhaust side angle interval to leaving the exhaust side angle interval, the sector corresponds to one exhaust side contact process of the sector, and is used as the sector exposure calculation window for the sector.

[0039] After the sector exposure calculation window is closed, valid running records with a valid write status of normal segment are extracted from the window. Records with valid status of invalid angle segment, invalid heat and humidity detection segment, and invalid gas detection segment are not included in the sector exposure calculation. If the sector exposure calculation window is not yet closed, the sector exposure record is marked as exposure calculation not closed.

[0040] In the valid operation record, the concentration excess during the process of exceeding the concentration of combustible volatile organic compounds on the exhaust side is read. The concentration excess is derived from the comparison result of the combustible volatile organic compound detection value on the exhaust side in S1 and the background concentration of the environment. Its dimension is consistent with the combustible volatile organic compound detection value on the exhaust side. When the combustible volatile organic compound detection value on the exhaust side is higher than the background concentration of the environment, the difference between the two is recorded as the concentration excess. When the combustible volatile organic compound detection value on the exhaust side is not higher than the background concentration of the environment, the concentration excess is recorded as 0. Valid operation records with a concentration excess greater than 0 are included in the exposure calculation of that sector. Valid operation records with a concentration excess of 0 retain the write time, but do not increase the exposure of that sector.

[0041] In the valid operation records included in the exposure calculation, the dwell time of the sector within the exhaust side angle interval is formed according to the adjacent write times. The dwell time only includes the time when the sector is within the exhaust side angle interval, and does not include the time within the fresh air side angle interval and the transition sealing zone. If any of the following states are met between adjacent write times: angle invalid segment, heat and humidity detection invalid segment, and gas detection invalid segment, the interval is not included in the dwell time.

[0042] In a preferred implementation, the sector exposure A_j for sector j is formed by the following formula: A_j = Σ(k=1 to n_j)C_j,k × Δt_j,k; where j is the sector number; k is the sequence number of the valid operation record participating in the exposure calculation under sector j; n_j is the total number of valid operation records participating in the exposure calculation under sector j; C_j,k is the concentration excess of sector j in the kth valid operation record; Δt_j,k is the dwell time of sector j corresponding to the kth valid operation record, in seconds; A_j is the sector exposure of sector j, the dimension of which is the product of the concentration dimension and the time dimension. C_j,k is taken from the process of the concentration excess of combustible volatile organic compounds on the exhaust side, and Δt_j,k is taken from the time interval of the same sector within the angular interval on the exhaust side, both corresponding to the same sector number and the same sector exposure calculation window.

[0043] S2 sets the effective coverage rate for the sector exposure calculation window. The effective coverage rate is the ratio of the exhaust side dwell time corresponding to the normally written segment in the window to the total exhaust side dwell time in the window. The total exhaust side dwell time is formed according to the wheel angle process. When the total exhaust side dwell time cannot be effectively formed by the wheel angle process, the sector exposure record is marked as restricted exposure calculation.

[0044] The coverage ratio threshold is determined by the gas detection cycle, angle detection cycle, and controller sampling cycle, preferably 80%, and can be set within the range of 70% to 90%. When the detection cycle is short and the sampling synchronization is stable, the coverage ratio threshold is 70% to 80%; when the detection cycle is long or the sampling synchronization fluctuates greatly, the coverage ratio threshold is 80% to 90%. When no calibration record of the coverage ratio threshold is formed, the coverage ratio threshold is 80%.

[0045] When the effective coverage of the window does not reach the coverage ratio threshold, the exposure record of the sector is marked as limited in exposure calculation. No low exposure state record is generated, and no effective sector exposure value is generated. After the effective coverage of the window reaches the coverage ratio threshold, the sector exposure A_j is used to enter the low exposure state branch or the exposure correction branch.

[0046] When the sector exposure A_j is 0, the sector exposure value E_j is recorded as 0, and a low exposure state record is generated. This low exposure state record is not included in the dwell correction and humidity correction calculations, and is used as a candidate record for baseline sector screening in S3.

[0047] When the sector exposure A_j is greater than 0, the residence ratio is formed based on the actual residence time and the reference residence time of the sector within the exhaust side angle interval. The actual residence time is the sum of the residence times corresponding to sector number j within the exhaust side angle interval and the concentration excess is greater than 0, denoted as T_j. The reference residence time is the time it takes for the sector to pass through the exhaust side angle interval at the rated speed, denoted as T_0j. T_j and T_0j use the same time dimension, and T_0j is greater than 0.

[0048] When T_j is greater than T_0j, the dwell ratio R_j is the ratio of T_j to T_0j; when T_j is not greater than T_0j, the dwell ratio R_j is recorded as 1. The R_j used to calculate the sector exposure value is limited to 1 to 5. When the ratio of T_j to T_0j is greater than 5, R_j participates in the sector exposure value calculation as 5, and the long-term dwell state is marked in the sector exposure record. The sector exposure value formed under the long-term dwell state is used by S3 to determine the sector to be detected, and is not used as the source of the baseline sector and detection threshold.

[0049] The baseline dwell time T_0j is formed by the angular width of the exhaust side angle range and the rated angular velocity of the heat and moisture recovery impeller. The angular width of the exhaust side angle range comes from the impeller duct structure and zero-position calibration results, and the rated angular velocity comes from the equipment operating parameters of the heat and moisture recovery impeller. When the equipment has multiple rated speed ranges, the rated speed corresponding to the current process mode is taken. When the current process mode does not form a valid rated speed parameter, the dwell ratio R_j is recorded as 1, and the dwell correction is marked as not enabled in the sector exposure record.

[0050] The humidity content of the exhaust side is read from the heat and humidity process of the fresh exhaust air, and a humidity correction term is formed based on the deviation of the humidity content of the exhaust side from the baseline humidity content of the exhaust air. The humidity content of the exhaust side is taken from the heat and humidity state of the exhaust side during the heat and humidity process of the fresh exhaust air. The humidity content involved in the humidity correction adopts the same dimension, preferably g / kg dry air.

[0051] For sector number j, the representative value W_j of exhaust side moisture content is formed by the exhaust side moisture content corresponding to each valid operation record within the exposure calculation window of that sector. Preferably, W_j is formed by weighting the concentration excess and residence time together, so that the period with higher concentration excess and longer residence time contributes more to W_j. Specifically, for each valid operation record participating in the exposure calculation, the concentration excess, residence time and exhaust side moisture content in the record are multiplied first, then the product results of each valid operation record under the same sector number are added together, and finally divided by the exposure A_j of that sector.

[0052] The baseline exhaust moisture content W_0 is the exhaust moisture content corresponding to the baseline historical exhaust side detection value used to form the environmental background concentration. W_0 is obtained from the baseline historical operation segment used to form the environmental background concentration in S1, and uses the same dimension as W_j. If the baseline historical operation segment is insufficient to form W_0, or if the dimensions of W_j and W_0 are inconsistent, the moisture content correction term G_j is set to 1, and the moisture content correction is marked as not enabled in the sector exposure record.

[0053] In a preferred implementation, the sector exposure value E_j of sector number j is formed by the sector exposure amount A_j, the dwell correction term F_j, and the humidity correction term G_j: E_j = A_j × F_j × G_j; when the dwell correction is enabled, F_j = 1 + a × ln(R_j); when the dwell correction is not enabled, F_j is 1; when the humidity correction is enabled, G_j = 1 + b × (W_j - W_0) / (W_j + W_0); when the humidity correction is not enabled, G_j is 1.

[0054] Wherein, E_j is the sector exposure value of sector j; A_j is the sector exposure amount of sector j; F_j is the residence correction term; G_j is the moisture content correction term; R_j is the residence ratio of sector j; W_j is the representative value of exhaust moisture content of sector j; W_0 is the baseline exhaust moisture content; a is the residence correction coefficient; b is the moisture content correction coefficient; ln(R_j) represents taking the natural logarithm of the residence ratio R_j, a and b are both dimensionless coefficients, R_j is not less than 1 and not greater than 5; W_j and W_0 use the same moisture content dimension, and the sum of W_j and W_0 is greater than 0.

[0055] In this calculation relationship, A_j represents the basic exposure of the same continuous sector under the condition of excessive concentration of combustible volatile organic compounds on the exhaust side; F_j represents the amplification effect of the actual residence time relative to the baseline residence time; and G_j represents the corrective effect of changes in exhaust humidity on the moisture absorption layer and residual state of the heat and moisture energy recovery impeller.

[0056] To illustrate the formation process of sector exposure values, we take an operational segment in the lithium battery electrolyte weighing room as an example. This operational segment represents the process where the concentration on the exhaust side exceeds the limit after the weighing container is opened by the explosion-proof constant temperature and humidity air conditioner. The heat and humidity energy recovery rotor has completed zero-point calibration. There are 36 consecutive sectors, each with an angular width of 10°. The angular width of the exhaust side angle interval is 120°. The rated angular velocity of the heat and humidity energy recovery rotor under the current process mode is 36° / s. Therefore, the reference dwell time of this sector when passing through the exhaust side angle interval at the rated speed is 3.33s.

[0057] Taking sector number 8 as an example, this sector is located in the exhaust side angle range within a sector exposure calculation window, and the valid records in this window are all normal write segments. The valid operation records corresponding to this sector are shown in Table 1 below. Table 1. Example data for calculating the exposure value of sector number 8:

[0058] The data listed in Table 1 are engineering setting data and operation segment data illustrating the S2 calculation process. Different equipment generates corresponding data based on the sector operation records formed by S1, the parameters of the heat and moisture energy recovery rotor equipment, and the current process mode.

[0059] In the example shown in Table 1, the sector exposure A_j is formed from four valid operation records. The excess concentration in each valid operation record is multiplied by the corresponding residence time, and then the results of each product are added together to obtain A_j as 5.81%LEL·s. The actual residence time T_j is 5.00s, which is greater than the baseline residence time T_0j, and the residence ratio R_j is 1.50. Taking a as 0.4, the residence correction term F_j is approximately 1.16. The representative value of exhaust air moisture content W_j is 13.22g / kg dry air, and the baseline exhaust air moisture content W_0 is 11.20g / kg dry air. Taking b as 0.2, the moisture content correction term G_j is approximately 1.02. After substituting A_j, F_j, and G_j into the sector exposure value calculation process, the sector exposure value E_j is approximately 6.86%LEL·s.

[0060] The dwell correction factor α is preferably between 0.2 and 0.8. This range is derived from the rated speed, minimum allowable operating speed, and dwell hold strategy of the heat and moisture energy recovery impeller. When the impeller allows a short low-speed operating time and the dwell hold strategy is triggered at a low frequency, the value of α is between 0.2 and 0.4. When the impeller allows a moderate low-speed operating time, the value of α is between 0.4 and 0.6. When the impeller allows a long low-speed operating time and there is an explosion-proof interlock dwell hold, the value of α is between 0.6 and 0.8. When no equipment commissioning record is formed, α is 0.4, and the dwell correction factor is marked as the default value in the sector exposure record.

[0061] The moisture content correction factor b is preferably between 0.1 and 0.5. This range is derived from the type of moisture-absorbing material of the heat and moisture energy recovery rotor and the record of exhaust air moisture content changes during the equipment commissioning phase. When the moisture-absorbing layer responds weakly to the exhaust air moisture content changes, the value of b is between 0.1 and 0.2; when the moisture-absorbing layer responds moderately to the exhaust air moisture content changes, the value of b is between 0.2 and 0.3; when the moisture-absorbing layer uses a moisture-absorbing coating and the exhaust air moisture content changes have a significant impact on the local residual state, the value of b is between 0.3 and 0.5. When no moisture content response record is formed, b is 0.2, and the moisture content correction factor is marked as the default value in the sector exposure record.

[0062] The dwell correction factor 'a' and the humidity correction factor 'b' are determined in at least one of the equipment commissioning and maintenance calibration phases. They are used to determine whether the running records of 'a' and 'b' meet the conditions of a closed sector exposure calculation window, a valid record status of normal write segment, and no exposure calculation limitation. When the running samples are insufficient to complete the calibration, the corresponding default values ​​are used. The sector exposure records formed using the default values ​​are marked as default value status. The default value status is not equivalent to the dwell correction not enabled status and the humidity correction not enabled status.

[0063] S2 performs admission control on sector exposure records, marking sector exposure records as having unclosed exposure calculations, limited exposure calculations, or long-term dwell states. These records are not used as the source of baseline sectors and detection thresholds in S3. When the sector exposure A_j is greater than 0 and either the dwell correction or the moisture correction is not enabled, the sector exposure record retains the base sector exposure A_j and serves as a conservative basis for judging the sector to be detected in S3, but is not used as the source of baseline sectors and detection thresholds.

[0064] The sector exposure record output by S2 includes sector number, sector exposure calculation window, sector exposure A_j, effective window coverage, actual dwell time T_j, baseline dwell time T_0j, dwell ratio R_j, representative value of exhaust air moisture content W_j, baseline exhaust air moisture content W_0, dwell correction item F_j, moisture correction item G_j, sector exposure value E_j, record validity status, and correction enabled status. The sector exposure record output by S2 serves as the input object for S3.

[0065] After S2 generates sector exposure records, S3 processes the sector exposure records along the rotation direction of the heat and moisture energy recovery wheel. Sectors with low exposure values ​​are recorded as baseline sectors. The fluctuation range of the exposure values ​​of the baseline sectors is used to form the detection threshold. Sectors that are about to switch to the fresh air side and whose exposure values ​​reach the detection threshold are recorded as sectors to be detected. Based on the heat and moisture process of the fresh and exhaust air and the indoor dew point process, bypass detection conditions including detection speed and bypass discharge status are generated.

[0066] This step continues processing of the sector exposure records formed in the same running segment in S2. It does not re-establish sector numbers or recalculate sector exposure values. The processing object called by S3 is the already closed sector exposure record. The sector exposure record includes sector number, sector exposure calculation window, sector exposure value, actual dwell time, baseline dwell time, record validity status, and correction enabled status. S3 also calls the wheel angle process, fresh air heat and humidity process, and indoor dew point process formed in S1 to determine the sector to be detected and its bypass detection conditions.

[0067] Taking the lithium battery electrolyte weighing room operation segment shown in Table 1 of S2 as an example, sector number 8 has already formed a sector exposure value, and this sector has not yet entered the fresh air side. S3 no longer re-determines whether there is a release risk in this sector based on the current exhaust side concentration, but determines whether this sector needs to enter the bypass detection relative to the current low exposure baseline based on the sector exposure record formed in S2. Compared with the method of making a permissible judgment based solely on the current exhaust side flammable volatile organic compound concentration, this step connects the exposure state that the same sector has accumulated on the exhaust side with the angle position of the sector about to enter the fresh air side.

[0068] S3 only calls sector exposure records that have been closed before the current time and have the same process mode. The same process mode means that the operating gear of the heat and moisture energy recovery wheel, the air supply and exhaust mode of the explosion-proof air conditioner, the dew point control setting of the weighing room, and the bypass valve control mode have not changed across modes, and the sector exposure calculation window has not been closed. These records do not participate in the baseline sector screening, detection threshold formation, and sector judgment. Delayed data enters the next processing cycle and does not reverse the already generated detection threshold, sector mark to be detected, and bypass detection conditions.

[0069] Before selecting baseline sectors, S3 determines the minimum distinguishable exposure based on the detection resolution limit of volatile organic compounds (VOCs) and the baseline residence time. The detection resolution limit of VOCs is determined by the nominal resolution of the detection device, the on-site zero-point calibration record, and the fluctuation of the environmental background concentration. It is used to characterize the minimum concentration change that the detection device can stably distinguish under the current range, explosion-proof installation location, and fluctuating exhaust conditions. For detection devices that output as a percentage of the lower explosive limit (LEL), the detection resolution limit is preferably 0.1% to 2% LEL. When the detection device has high accuracy and the environmental background fluctuation is small, it is 0.1% to 0.5% LEL. When the detection device is installed in the exhaust mixing section, the exhaust fluctuation is significant, or the environmental background fluctuation is large, it is 0.5% to 2% LEL. When no on-site calibration record is formed, the larger value between the nominal resolution of the detection device and 1% LEL is taken. When the nominal resolution of the detection device is higher than 2% LEL, the minimum distinguishable exposure is determined according to the nominal resolution of the detection device, and the corresponding record is not used as the source of the baseline sector.

[0070] The baseline dwell time continues to use the baseline dwell time already established in S2. The minimum distinguishable exposure level is jointly formed by the detection resolution limit of combustible volatile organic compounds and the baseline dwell time. Its dimension is consistent with the sector exposure value, which is the product of the concentration dimension and the time dimension. The minimum distinguishable exposure level is not used as the exhaust side alarm threshold, but is used to determine whether the exposure value of a certain sector exceeds the low exposure boundary that the current detection resolution capability can reliably distinguish.

[0071] S3 filters baseline sectors from closed sector exposure records with consistent process modes. During the filtering process, sector exposure records with incomplete exposure calculations, limited exposure calculations, or actual dwell times exceeding the dwell multiple limit range are first excluded. Incomplete exposure calculations indicate that the sector has not fully passed the exhaust side angle interval; limited exposure calculations indicate that the sector's effective coverage is insufficient; and actual dwell times exceeding the dwell multiple limit range indicate that the sector has an abnormal low-speed dwell or a stop-and-hold process. After the exclusion is completed, sectors whose exposure values ​​do not exceed the minimum distinguishable exposure amount are recorded as baseline sectors. For records in S2 with sector exposure values ​​of 0 and effective coverage meeting the standards, they can be used as the source of baseline sectors after meeting the aforementioned exclusion conditions.

[0072] The number of baseline sectors should meet the minimum requirement. Preferably, within the called closed operating cycle, the number of baseline sectors should be no less than 3 and no less than 10% of the total number of consecutive sectors. Taking a heat and moisture energy recovery rotor with 36 consecutive sectors as an example, the number of baseline sectors should preferably be no less than 4. When the number of baseline sectors in the most recent closed operating cycle is insufficient, under the premise of consistent process mode, the sector exposure records of the most recent 2 to 3 closed operating cycles are called forward. Historical records exceeding 3 closed operating cycles are not included in the formation of the detection threshold. If the number of baseline sectors is still insufficient, this step does not form the detection threshold for opening normal heat and moisture recovery. For sectors whose sector exposure value reaches the minimum distinguishable exposure amount and has entered the pre-trigger angle range, the corresponding sector number, pre-trigger angle, detection speed, and bypass discharge status of the full exhaust method are generated. The detection speed is taken as the rated speed under the current process mode, so that the detection airflow on the fresh air side corresponding to the sector is discharged through the bypass discharge path.

[0073] After the baseline sectors are determined, S3 reads the sector exposure values ​​of each baseline sector to form the sector exposure value fluctuation range of the baseline sectors. Specifically, the largest sector exposure value in the baseline sectors is taken as the upper boundary, and the smallest sector exposure value in the baseline sectors is taken as the lower boundary. The difference between the two is taken as the exposure value fluctuation range of the low-exposure sectors under the current operating conditions. This fluctuation range comes from the same heat and moisture energy recovery rotor, the same process mode, and the already closed sector exposure records. It is used to reflect the current exhaust background fluctuation, angle writing error, sampling interval difference, and natural differences between low-exposure sectors.

[0074] The detection threshold is formed based on the fluctuation range of the sector exposure value of the baseline sector and the minimum distinguishable exposure. Specifically, the upper boundary of the sector exposure value of the baseline sector is used as the base boundary. The envelope expansion corresponding to the fluctuation range of the baseline sector exposure value is superimposed on this base boundary, and then the minimum distinguishable exposure is superimposed to form the detection threshold for the current processing cycle. The envelope expansion is preferably 0.5 to 1.5 times the fluctuation range of the baseline sector exposure value. This range is determined by stable operating segments during the equipment commissioning or maintenance calibration phase, and the stable operating segments must consist of at least three closed loops. The period is set such that, when the rotor angle is written normally, the exhaust side detection data is valid, the bypass valve is not in the switching process and there is no disturbance from opening the weighing container, the number of baseline sectors is more than twice the minimum requirement and the volatile organic compound detection device responds stably, the value is 0.5 to 0.8 times. When the number of baseline sectors is close to the minimum requirement, the controller sampling has synchronous fluctuations, or any of the states of rotor angle writing jitter are met, the value is 0.8 to 1.5 times. When no envelope expansion calibration record is formed, the envelope expansion amount is 1 times the fluctuation range of the baseline sector exposure value.

[0075] After the detection threshold is formed, S3 determines whether each sector is about to enter the fresh air side along the rotation direction of the heat and moisture energy recovery wheel. The judgment object is the leading edge of the sector, not the center of the sector. The leading edge of the sector is the boundary position where the sector first reaches the fresh air side inlet boundary along the rotation direction. The position of the leading edge of the sector is determined by the angle interval corresponding to the sector number, the current angle position of the wheel, and the rotation direction. The remaining angle represents the angle distance that the leading edge of the sector still needs to travel to the fresh air side inlet boundary. This remaining angle is formed only based on the wheel angle process obtained at the current moment and does not use subsequent angle data. When the angle coordinate crosses the 0° position, the remaining angle is calculated according to the cyclic angle relationship from 0° to 360° to avoid misjudging the return to zero position as a reverse change.

[0076] The pre-trigger angle is the advance angle required for the bypass discharge path to open in advance. S3 first obtains the time required for the bypass valve to complete its action, the time required for the combustible volatile organic compound (VOC) detection device to stabilize its response, and the time required for the controller to sample. Then, based on the current angular velocity of the rotor, the aforementioned times are converted into the angular distance traversed by the sector to be detected within that time, and an angle safety margin is added to form the pre-trigger angle. The time required for the bypass valve to complete its action is derived from the bypass valve actuator parameters and debugging records, preferably 0.5s to 3s; the time required for the combustible volatile organic compound (VOC) detection device to stabilize its response is derived from the detection device response parameters and on-site calibration records, preferably 1s to 10s; the time required for the controller to sample is derived from the controller sampling settings, preferably 0.1s to 1s; the angle safety margin is derived from the bypass valve position feedback delay and rotor angle writing jitter, preferably 5° to 15°, and 10° when no calibration record is formed. When any of the aforementioned time parameters does not form a valid value, the upper limit of the corresponding preferred range is taken to form the pre-trigger angle. This pre-trigger angle is only used for sectors that meet the detection conditions or where the number of the aforementioned baseline sectors is insufficient to reach the minimum distinguishable exposure level.

[0077] When the remaining angle of a certain sector is not greater than the pre-trigger angle, and the exposure value of the sector reaches the detection threshold, the sector is marked as a sector to be detected. The sector to be detected is marked with the sector number, the corresponding sector exposure value, the remaining angle, the detection threshold, and the expected time of entering the fresh air side. Taking sector number 8 in Table 1 of S2 as an example, when its sector exposure value reaches the current detection threshold, and the remaining angle from its leading edge to the fresh air side inlet boundary is not greater than the pre-trigger angle, S3 marks sector number 8 as a sector to be detected. The sector to be detected mark only applies to the fresh air side detection airflow corresponding to the sector and does not indicate that the entire heat and moisture energy recovery rotor enters the bypass discharge.

[0078] After the sector to be detected is formed, S3 generates a detection speed based on the degree to which the sector exposure value exceeds the detection threshold. The higher the degree of exceedance, the more obvious the cumulative exposure of the sector on the exhaust side, and the higher the possibility of residual release after entering the fresh air side. Therefore, the detection speed is reduced accordingly to prolong the contact time between the fresh air side detection airflow and the sector to be detected. The detection speed is not lower than the minimum allowable speed of the heat and moisture recovery wheel and not higher than the rated speed under the current process mode. The minimum allowable speed of the heat and moisture recovery wheel is derived from the inverter parameters, the wheel drive motor parameters, and the explosion-proof interlock settings. The rated speed under the current process mode is derived from the operating parameters of the air conditioning controller. If the minimum allowable speed of the heat and moisture recovery wheel is not formed, or if the minimum allowable speed is higher than the rated speed under the current process mode, the detection speed is taken as the rated speed under the current process mode, and the fresh air side detection airflow corresponding to the sector to be detected is discharged through the bypass discharge path.

[0079] In a preferred implementation, when the sector exposure value of the sector to be detected is higher than the detection threshold but not more than 1.2 times the detection threshold, the detection speed is 80% to 100% of the rated speed under the current process mode; when the sector exposure value of the sector to be detected exceeds 1.2 times the detection threshold but does not reach twice the detection threshold, the detection speed is 50% to 80% of the rated speed; when the sector exposure value of the sector to be detected reaches more than twice the detection threshold, the detection speed is selected between the minimum allowable speed and 50% of the rated speed. If the minimum allowable speed of the heat and moisture energy recovery rotor is higher than 50% of the rated speed, the detection speed is the minimum allowable speed. When no detection speed adjustment calibration record is formed, the detection speed is the intermediate value between the minimum allowable speed and the rated speed. When the rotor drive system is in an explosion-proof interlock state where speed reduction is not allowed, the detection speed is maintained at the rated speed under the current process mode, and the fresh air detection airflow corresponding to the sector to be detected is discharged through the bypass discharge path.

[0080] S3 further constrains the detection speed and bypass discharge status based on the fresh air heat and humidity process and the indoor dew point process. The current indoor dew point is read from the indoor dew point process, and the upper boundary of the indoor dew point is obtained by the explosion-proof air conditioner dew point control setting. The two form the indoor dew point margin. The fresh air side temperature and fresh air side relative humidity are read from the fresh air heat and humidity process, and the dew point conversion table or humid air calculation program in the air conditioner controller is called to form the fresh air side dew point. The current indoor dew point, the upper boundary of the indoor dew point, and the fresh air side dew point are all in °C as the unit. The relative humidity percentage is used for judgment after dew point conversion.

[0081] The dew point safety margin is preferably between 0.5℃ and 1.5℃. This range is determined by the dew point control accuracy of the weighing room, the adjustment margin of the dehumidification unit, and the disturbance caused by opening the cover. When the dew point control accuracy of the weighing room is high and the air conditioning dehumidification margin is sufficient, the dew point safety margin is between 0.5℃ and 1.0℃. When any of the following conditions are met: frequent opening of the weighing room cover, large disturbance from personnel entering and exiting, or insufficient dehumidification margin, the dew point safety margin is between 1.0℃ and 1.5℃. When no on-site commissioning record is formed, the dew point safety margin is 1.0℃. When the indoor dew point margin is lower than the dew point safety margin and the fresh air side dew point is higher than the indoor dew point... When any of the states in the boundary is met, the detection speed is increased to the greater of the dew point constraint speed and the original detection speed. The dew point constraint speed is preferably 60% to 100% of the rated speed and not lower than the minimum allowable speed of the heat and moisture energy recovery rotor. If the minimum allowable speed is higher than 60% of the rated speed, the dew point constraint speed is not lower than the minimum allowable speed. When any of the data of the current indoor dew point, the fresh air side dew point and the upper boundary of the indoor dew point cannot be effectively formed, the detection speed is taken as the rated speed under the current process mode, and the fresh air side detection airflow corresponding to the sector to be detected is discharged through the bypass discharge path.

[0082] The bypass discharge state is determined based on the remaining angle of the sector to be detected, the position of the fresh air side inlet boundary, and the time required for the bypass valve to complete its action. The bypass discharge state includes the pre-discharge state, the detection discharge state, and the maintenance discharge state. When the sector to be detected has not yet entered the fresh air side and the remaining angle is not greater than the pre-trigger angle, the bypass valve enters the pre-discharge state, which opens the bypass discharge path in advance. After the leading edge of the sector to be detected reaches the fresh air side inlet boundary, the bypass valve enters the detection discharge state, which allows the fresh air side detection airflow passing through the sector to be detected to be discharged through the bypass discharge path.

[0083] The fresh air side detection angle range is the angle range from the point where the sector to be detected enters the fresh air side inlet boundary to the point where it leaves the fresh air side detection airflow contact area. After the sector to be detected leaves the fresh air side detection angle range, the bypass valve enters the holding discharge state. The holding time is not less than the sum of the time required for the combustible volatile organic compound detection device to achieve a stable response and one controller sampling cycle. The holding discharge state is used to ensure that the residual release response corresponding to the sector to be detected fully enters the bypass detection process, and to avoid the bypass valve resetting too early, causing the tail end of the response to enter the normal air supply path.

[0084] When the full exhaust mode is triggered, the full exhaust mode only applies to the fresh air side detection airflow of the corresponding sector. This detection airflow is discharged through the bypass exhaust path and does not enter the normal supply air path. The full exhaust mode does not change the normal operating permission of the non-detected sector. When the full exhaust mode is not triggered and the indoor dew point margin reaches the dew point safety margin and the fresh air side dew point is not higher than the upper boundary of the indoor dew point, the bypass exhaust state sequentially enters the pre-exhaust state, detection exhaust state, and maintenance exhaust state. When the bypass valve position feedback is not confirmed to be in place, the bypass exhaust state is maintained and no conditions for exiting the bypass exhaust state are generated.

[0085] The bypass detection conditions output by S3 include the sector marker to be detected, detection threshold, pre-trigger angle, detection speed, and bypass discharge status. If no detection threshold is formed, S3 does not generate a sector marker to be detected. For sectors that have entered the pre-trigger angle range and whose sector exposure value has reached the minimum distinguishable exposure level, the corresponding sector number, pre-trigger angle, detection speed, and bypass discharge status are generated. The detection speed is taken as the rated speed under the current process mode, so that the fresh air detection airflow corresponding to the sector is discharged through the bypass discharge path. The output of S3 is only used by S4 to drive the heat and moisture energy recovery rotor and bypass discharge path to perform bypass detection. It is not used to update the baseline sector and detection threshold in this step. The concentration response, dew point response, and residual release marker formed by S4 belong to the subsequent detection results. They can only be used to determine whether to maintain bypass and to record the verification of subsequent operating cycles. They cannot rewrite the detection threshold that has already been formed. The bypass detection conditions output by S3 are available for S4 to call.

[0086] In one specific implementation, S4 includes: driving the heat and moisture energy recovery rotor according to the bypass detection conditions, so that the fresh air side detection airflow passing through the sector to be detected enters the bypass discharge path, comparing the concentration response and dew point response of the sector to be detected with the concentration response and dew point response of the baseline sector, and generating a residual release marker; maintaining the bypass discharge path when the residual release marker exists, opening normal heat and moisture recovery when the residual release marker is removed, and outputting a linkage adjustment command acting on the bypass valve, dehumidification unit and reheat unit.

[0087] S4 continues to process the bypass detection conditions formed by S3. The bypass detection conditions include the sector to be detected, the detection speed, and the bypass discharge status. S4 does not re-form the sector to be detected or recalculate the detection threshold. Instead, it controls the heat and moisture energy recovery wheel and the bypass valve according to the bypass detection conditions so that when the sector to be detected enters the fresh air side detection angle range, the fresh air side detection airflow passing through the sector to be detected enters the bypass discharge path.

[0088] The explosion-proof air conditioning control system reads the detection speed from the bypass detection conditions and outputs the detection speed to the drive controller of the heat and moisture energy recovery wheel, so that the heat and moisture energy recovery wheel runs according to the detection speed. At the same time, it reads the bypass discharge status and outputs a valve position control signal to the bypass valve actuator, so that the bypass valve switches to the bypass discharge path. The actual position of the bypass valve is confirmed by the bypass valve position feedback signal. If the bypass valve position feedback is not confirmed to be in place, the bypass control signal is maintained and normal heat and moisture recovery is not opened.

[0089] Once the sector to be detected enters the detection angle range of the fresh air side, the detection value of combustible volatile organic compounds in the fresh air side detection airflow is collected by the combustible volatile organic compound detection device in the bypass exhaust path. The temperature and humidity detection values ​​of the fresh air side detection airflow are collected by the temperature and humidity detection device in the bypass exhaust path. The explosion-proof air conditioning control system generates the concentration response of the sector to be detected based on the combustible volatile organic compound detection value, and generates the dew point response of the sector to be detected based on the temperature and humidity detection values ​​by calling one of the dew point conversion table and the humid air calculation program. Both the concentration response and the dew point response are taken from the detection results in the bypass exhaust path.

[0090] To ensure the response results correspond to the sector to be detected, S4 determines the response acquisition window for the sector to be detected based on the moment the sector enters the fresh air side detection angle range, the moment it leaves the fresh air side detection angle range, the airflow delivery time of the bypass exhaust path, and the stable response time of the detection device. The airflow delivery time is formed by the detection section length and average wind speed of the bypass exhaust path. The average wind speed is formed by dividing the current bypass ventilation volume by the duct cross-sectional area. The current bypass ventilation volume is formed by the bypass ventilation volume sensor, or by conversion from the bypass fan frequency, bypass valve opening, and duct characteristic table. The airflow delivery time can also be calibrated by the detection response delay after the bypass valve step switch. When no on-site calibration record is formed, the maximum airflow delivery time in the explosion-proof air conditioning design data is taken. The stable response time of the detection device comes from the response parameters of the detection device. When an on-site calibration record exists, the on-site calibration record is used. When no on-site calibration record is formed, the upper limit of the response time specified in the technical document of the detection device is used. Detection values ​​formed outside the response acquisition window are not used as the concentration response and dew point response of the sector to be detected.

[0091] When the controller diagnostic status of the volatile organic compound (VOC) detection device is normal, the sampling update time does not exceed the upper limit of the corresponding detection cycle, and the detection value is within the effective range, and the controller diagnostic status of the temperature and humidity detection device is normal, the sampling update time does not exceed the upper limit of the corresponding detection cycle, and the temperature and humidity detection values ​​are within the effective range, the bypass valve position feedback signal is consistent with the target valve position, and the times when the detection sector enters and leaves the detection angle range of the fresh air side are both effectively formed, S4 forms a valid concentration response and dew point response for the detection sector. If any of the following conditions are met: volatile organic compound (VOC) detection device malfunction, temperature and humidity detection device malfunction, bypass valve position feedback is invalid, or the response acquisition window cannot be closed, a residual release marker based on the response of the detection sector is not generated, no residual release marker release condition is formed, normal heat and humidity recovery is not opened, and the bypass detection result is marked as detection limited. Detection limited is used to indicate that the data validity of this bypass detection is insufficient and is not used as a judgment result for the establishment or release of residual VOCs.

[0092] The concentration and dew point responses of the baseline sector are derived from the baseline sector determined in S3. When the baseline sector passes through the detection angle range on the fresh air side, response records are collected using the same response acquisition window, the same bypass exhaust path, and the same detection device status as the sector to be detected. Valid baseline response records should meet the following requirements: valid baseline sector marking, valid bypass valve position feedback, valid combustible volatile organic compound detection device, valid temperature and humidity detection device, and the acquisition window should not overlap with the bypass valve switching process. Valid baseline response records are response records that have been collected and meet the validity conditions before the generation of this residual release marker. Baseline response records formed after the generation of this residual release marker are not included in this comparison. When there are no fewer than 3 valid baseline response records, S4 takes the upper boundary of the concentration response in the valid baseline response records as the concentration response of the baseline sector and the upper boundary of the dew point response in the valid baseline response records as the dew point response of the baseline sector. No fewer than 3 valid baseline response records are used to form the upper boundary of the baseline response and reduce the impact of single detection fluctuations.

[0093] S4 forms a concentration response margin based on the detection resolution limit of combustible volatile organic compounds (VOCs). The concentration response margin and the detected value of combustible VOCs use the same dimensions. The concentration response margin is preferably 1 to 2 times the detection resolution limit of combustible VOCs. When the response of the combustible VOCs detection device is stable and there are more than 6 effective baseline response records, the concentration response margin is 1 to 1.3 times the detection resolution limit. When any of the following conditions are met: the response of the combustible VOCs detection device fluctuates, there are 3 to 5 effective baseline response records, or there is flow fluctuation in the bypass discharge path, the concentration response margin is 1.3 to 2 times the detection resolution limit. When no on-site calibration record is formed, the concentration response margin is 2 times the detection resolution limit. The concentration response of the baseline sector and the concentration response margin are used together as the concentration control boundary.

[0094] S4 generates a dew point response margin based on the dew point detection accuracy. The dew point response margin is measured in °C and is determined by the resolution of the temperature and humidity detection device, the accuracy of the dew point conversion, and the dew point control dead zone in the weighing room. It is preferably between 0.2 °C and 0.6 °C. When the accuracy of the temperature and humidity detection device is high and the dew point conversion is stable, the dew point response margin is between 0.2 °C and 0.3 °C. When any of the following conditions are met: large fluctuations in temperature and humidity detection, airflow fluctuations in the bypass discharge path, or a wide dew point control dead zone in the weighing room, the dew point response margin is between 0.3 °C and 0.6 °C. When no on-site calibration record is generated, the dew point response margin is 0.5 °C. The dew point response of the baseline sector and the dew point response margin are used together as the dew point reference boundary.

[0095] When the concentration response of the sector to be detected is higher than the concentration control boundary, S4 generates a residual release marker. The residual release marker includes the sector number to be detected, the concentration response, the concentration response of the baseline sector, the marker generation time, and the status of the bypass discharge path. When the dew point response of the sector to be detected is higher than the dew point control boundary, the generation conditions of the residual release marker are not changed. When the residual release marker exists, the dew point response is recorded in the residual release marker. When the residual release marker is not generated, the dew point response is saved as a dew point disturbance record. The dew point response serves as the basis for the linkage adjustment of the dehumidification unit and the reheating unit. The dew point disturbance record is not used as the basis for maintaining the residual release of the bypass discharge path.

[0096] When the residual release marker is present, the S4 control bypass valve keeps the bypass discharge path open, allowing the fresh air detection airflow passing through the sector to be detected to continue entering the bypass discharge path instead of the normal supply air path. After the sector to be detected leaves the fresh air detection angle range, the bypass valve still keeps the bypass discharge path open until the residual release marker is removed. During this period, the explosion-proof air conditioning control system continuously collects the detection values ​​of combustible volatile organic compounds and temperature and humidity in the bypass discharge path, and forms the concentration response and dew point response in the residual release confirmation window. The concentration response and dew point response in the residual release confirmation window are only used to determine whether the residual release marker has been removed, and do not rewrite the concentration response and dew point response already formed in the response collection window of the sector to be detected.

[0097] S4 sets a residual release confirmation window to determine whether the residual release marker has been removed. The residual release confirmation window is formed by the stable response time of the volatile organic compound (VOC) detector and the controller sampling cycle. Under normal circumstances, the residual release confirmation window is 2 to 5 controller sampling cycles. When this value is lower than the sum of the stable response time of the VOC detector and one controller sampling cycle, the sum of the stable response time of the VOC detector and one controller sampling cycle is used as the residual release confirmation window. When the bypass discharge path is short, the detector response is stable, and the dew point response drops quickly, the residual release confirmation window is 2 to 3 controller sampling cycles. When any of the following conditions are met: the bypass discharge path is long, the detector response is slow, or the dew point response drops slowly, the residual release confirmation window is 3 to 5 controller sampling cycles. When no on-site calibration record is formed, the residual release confirmation window is 3 controller sampling cycles, and the aforementioned lower limit requirement is met.

[0098] Within the residual release confirmation window, when the concentration response is not higher than the concentration control boundary, the dew point response is not higher than the dew point control boundary, and the indoor dew point margin reaches the dew point safety margin, the residual release marker is removed. The indoor dew point margin is formed by the upper boundary of the indoor dew point and the current indoor dew point. The current indoor dew point is formed by converting the indoor temperature and humidity detection values ​​into dew point values. The dew point safety margin follows the value formed in S3.

[0099] After the residual release marker is removed, S4 checks whether the bypass valve position feedback is valid. If the bypass valve position feedback is valid, the explosion-proof air conditioning control system controls the bypass valve to switch from the bypass discharge path to the normal heat and humidity recovery path, and opens the normal heat and humidity recovery. If the bypass valve position feedback is invalid, the normal heat and humidity recovery is not opened, the bypass control signal is maintained, and the abnormal status of the bypass valve feedback is recorded.

[0100] S4 generates a bypass valve adjustment command based on the presence of the residual release mark. When the residual release mark is present, the bypass valve adjustment command is to keep the bypass discharge path open. When the residual release mark is removed and the bypass valve position feedback is valid, the bypass valve adjustment command is to switch to the normal heat and humidity recovery path. The bypass valve adjustment command is output to the bypass valve actuator, and the explosion-proof air conditioning control system reads the bypass valve position feedback signal to confirm the execution status.

[0101] S4 generates dehumidification unit adjustment commands and reheat unit adjustment commands based on the state where the dew point response of the sector to be detected is higher than the dew point reference boundary. When the dew point response of the sector to be detected is higher than the dew point reference boundary, the dehumidification unit adjustment command is used to increase the dehumidification output of the dehumidification unit and reduce the humidity of the supply air entering the weighing room. The reheat unit adjustment command is used to compensate the supply air temperature after dehumidification so that the supply air temperature meets the control setting of the explosion-proof constant temperature and humidity air conditioner. When the dew point response of the sector to be detected is not higher than the dew point reference boundary, the dehumidification unit and the reheat unit maintain the current control state and do not generate enhanced adjustment commands based on the current sector to be detected.

[0102] The linkage adjustment commands output by S4 include bypass valve adjustment commands, dehumidification unit adjustment commands, and reheat unit adjustment commands. The linkage adjustment commands act on the bypass valve, dehumidification unit, and reheat unit of the explosion-proof air conditioner. The concentration response, dew point response, residual release marker, and linkage adjustment commands generated by S4 are saved as the bypass detection results for this operation cycle review. These results do not reverse-write the sector marker, detection threshold, and bypass detection conditions already generated by S3.

[0103] Example 2: Please refer to Figure 2 Based on Example 1, this embodiment also provides an explosion-proof air conditioner intelligent temperature control system, including: a sector writing module, which acquires the heat and moisture recovery operation record of the explosion-proof air conditioner. The heat and moisture recovery operation record includes the process of the concentration of combustible volatile organic compounds on the exhaust side exceeding the limit, the rotor angle process, the heat and moisture process of the fresh exhaust air and the indoor dew point process. The heat and moisture recovery operation record is written into continuous sectors according to the angle position of the heat and moisture energy recovery rotor to generate sector operation record. The exposure record module calculates the exposure amount of each sector based on the sector operation record, writes the process of the exhaust side combustible volatile organic compound concentration exceeding the limit into the corresponding sector, and then corrects the exposure amount according to the sector dwell process and the change of exhaust humidity to generate a sector exposure record that records the sector exposure value. The bypass condition module processes sector exposure records along the rotation direction of the heat and moisture energy recovery wheel, filters baseline sectors, forms a detection threshold based on the fluctuation range of sector exposure values ​​of the baseline sectors, and records sectors that are about to switch to the fresh air side and whose sector exposure values ​​reach the detection threshold as sectors to be detected; it generates bypass detection conditions including detection speed and bypass discharge status based on the heat and moisture process of fresh and exhaust air and the indoor dew point process. The linkage control module drives the heat and moisture energy recovery rotor and controls the bypass valve according to the bypass detection conditions, so that the fresh air detection airflow passing through the sector to be detected enters the bypass discharge path. It compares the concentration response and dew point response of the sector to be detected with the concentration response and dew point response of the baseline sector to generate a residual release marker. When the residual release marker exists, the bypass discharge path is maintained. When the residual release marker is removed, normal heat and moisture recovery is opened, and linkage control commands acting on the bypass valve, dehumidification unit and reheat unit are output.

[0104] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented in software, the above embodiments can be implemented, in whole or in part, as a computer program product. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution.

[0105] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0106] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A method for intelligent temperature control and regulation of an explosion-proof air conditioner, characterized in that, include: Obtain the heat and humidity recovery operation record of the explosion-proof air conditioner. The heat and humidity recovery operation record includes the process of the concentration of combustible volatile organic compounds on the exhaust side exceeding the limit, the rotor angle process, the heat and humidity process of fresh and exhaust air, and the indoor dew point process. Write the heat and humidity recovery operation record into a continuous sector according to the angle position of the heat and humidity energy recovery rotor to generate a sector operation record. The exposure amount of each sector is calculated based on the sector operation record. The process of exceeding the concentration of combustible volatile organic compounds on the exhaust side is written into the corresponding sector. The exposure amount is then corrected according to the sector dwell process and the change in exhaust humidity to generate a sector exposure record that records the sector exposure value. The sector exposure records are processed along the rotation direction of the heat and moisture energy recovery wheel, the baseline sector is screened, and the detection threshold is formed by the fluctuation range of the sector exposure value of the baseline sector. The sector that is about to switch to the fresh air side and whose sector exposure value reaches the detection threshold is recorded as the sector to be detected. Based on the heat and humidity process of the fresh exhaust air and the indoor dew point process, bypass detection conditions are generated, including detection speed and bypass discharge status. Drive the heat and moisture energy recovery rotor and control the bypass valve according to the bypass detection conditions, so that the fresh air detection airflow passing through the sector to be detected enters the bypass discharge path. Compare the concentration response and dew point response of the sector to be detected with the concentration response and dew point response of the baseline sector to generate a residual release marker. The bypass discharge path is maintained when the residual release mark is present, and normal heat and humidity recovery is opened when the residual release mark is removed, and linkage adjustment commands are output to the bypass valve, dehumidification unit and reheat unit.

2. The intelligent temperature control method for explosion-proof air conditioners according to claim 1, characterized in that, Obtain the heat and humidity recovery operation records of the explosion-proof air conditioner, including: The exhaust side volatile organic compound (VOC) detection value is compared with the environmental background concentration of the same dimension to generate the process where the exhaust side VOC concentration exceeds the set range. The environmental background concentration is taken from the baseline historical exhaust side detection value when the exhaust volume is within the set operating range. The process of calibrating the angle detection signal of the heat and moisture energy recovery wheel at the zero position and generating the wheel angle is as follows: The fresh air and exhaust air heat and humidity process is generated based on the heat and humidity detection signals from the fresh air side and the exhaust air side, and the indoor dew point process is generated based on the indoor heat and humidity detection signals.

3. The intelligent temperature control method for explosion-proof air conditioners according to claim 2, characterized in that, Generate sector execution records, including: Divide the continuous sectors along the rotation direction of the heat and moisture energy recovery wheel, and use the wheel angle process as the writing basis to write the heat and moisture recovery operation record at the same writing moment into the continuous sector corresponding to the current angle position. If any of the following conditions are met: the rotor angle process has not completed zero-point calibration, or the direction of angle change is inconsistent with the rotation direction of the heat and moisture energy recovery rotor, writing to the continuous sector will stop, and the corresponding time segment will be recorded as an invalid angle segment. Write the sector number, write time, and record validity status into the record item of the corresponding consecutive sector to generate a sector operation record.

4. The intelligent temperature control method for explosion-proof air conditioners according to claim 3, characterized in that, The process of exceeding the concentration of combustible volatile organic compounds on the exhaust side is written into the corresponding sector, including: Using sector number as the processing object, the operation record of the sector during the period when the sector is in the exhaust side angle range is extracted according to the rotor angle process. The exhaust side angle range is the angle range of contact between the sector and the exhaust side airflow in the heat and moisture energy recovery rotor. Extract valid running records with a valid state of normal writing, and read the amount of concentration exceeding the limit from the exhaust side corresponding to the valid running record during the process of exceeding the concentration of combustible volatile organic compounds; Valid operational records with concentration exceeding 0 are included in the exposure calculation for that sector. The sector exposure is calculated based on the concentration exceeding the limit and the duration of residence of that sector within the exhaust side angle range.

5. The intelligent temperature control method for explosion-proof air conditioners according to claim 4, characterized in that, Generate sector exposure records that record sector exposure values, including: The dwell time ratio is formed based on the actual dwell time of the sector within the exhaust side angle range and the reference dwell time. The reference dwell time is the time it takes for the sector to pass through the exhaust side angle range at the rated speed. When the actual dwell time is not greater than the reference dwell time, the dwell time ratio is recorded as 1. The humidity content of the exhaust air is read during the heat and humidity process of the fresh exhaust air, and a humidity correction term is formed based on the deviation of the humidity content of the exhaust air relative to the baseline humidity content of the exhaust air. The baseline humidity content of the exhaust air is the humidity content of the exhaust air corresponding to the baseline historical exhaust air detection value used to form the environmental background concentration. A stay correction term is generated based on the stay ratio, and the sector exposure is adjusted according to the stay correction term and the humidity correction term to generate the sector exposure value, which is then written into the sector exposure record.

6. The intelligent temperature control method for explosion-proof air conditioners according to claim 5, characterized in that, The formation of the baseline sector, detection threshold, and sector to be detected includes: Retrieve exposure records of sectors that were closed before the current time and have the same process mode, and form the minimum distinguishable exposure level based on the detection resolution limit of combustible volatile organic compounds and the baseline residence time; Exclude sector exposure records that are not closed in exposure calculation, have limited exposure calculation, or have actual stay duration that exceeds the stay ratio limit. Sectors whose sector exposure values ​​do not exceed the minimum distinguishable exposure amount are recorded as baseline sectors. The detection threshold is formed based on the fluctuation range of sector exposure values ​​in the baseline sector and the minimum distinguishable exposure level. The remaining angle from the leading edge of the sector to the fresh air inlet boundary along the rotation direction is determined based on the rotation angle process. When the remaining angle is not greater than the pre-trigger angle and the sector exposure value reaches the detection threshold, the corresponding sector is recorded as the sector to be detected. The pre-trigger angle is the advance angle required for the bypass exhaust path to be opened in advance.

7. The intelligent temperature control method for explosion-proof air conditioners according to claim 6, characterized in that, The generation of bypass detection conditions includes: The pre-trigger angle is determined by the time required for the bypass valve to complete its action, the combustible volatile organic compound detection device to stabilize its response, and the controller to sample, combined with the current angular velocity of the rotor. The detection speed is generated based on the degree to which the sector exposure value of the sector to be detected exceeds the detection threshold. The detection speed is not lower than the minimum allowable speed of the heat and moisture energy recovery wheel, and not higher than the rated speed under the current process mode. The indoor dew point margin is formed based on the indoor dew point process, and the fresh air side dew point is formed based on the fresh and exhaust air heat and humidity process. When either the indoor dew point margin is lower than the dew point safety margin or the fresh air dew point is higher than the upper boundary of the indoor dew point, the fresh air detection airflow corresponding to the sector to be detected is discharged through the bypass discharge path. When the indoor dew point margin reaches the safe dew point margin and the fresh air dew point is not higher than the upper boundary of the indoor dew point, the bypass discharge state sequentially enters the pre-discharge state, the detection discharge state, and the maintenance discharge state.

8. The intelligent temperature control method for an explosion-proof air conditioner according to claim 7, characterized in that, Generate residual release markers, including: Control the heat and moisture energy recovery rotor and bypass valve according to the bypass detection conditions, so that the fresh air detection airflow passing through the sector to be detected enters the bypass discharge path; Collect the detection values ​​of combustible volatile organic compounds and temperature and humidity values ​​in the bypass discharge path to form the concentration response and dew point response of the sector to be detected; The concentration response and dew point response of the sector to be detected were compared with the concentration response and dew point response of the baseline sector, respectively. When the concentration response of the sector to be detected is higher than that of the baseline sector, a residual release marker is generated; When a residual release marker is present and the dew point response of the sector to be detected is higher than that of the baseline sector, the dew point response is recorded in the residual release marker.

9. The intelligent temperature control method for an explosion-proof air conditioner according to claim 8, characterized in that, Maintain the bypass discharge path, enable normal heat and humidity recovery, and output linkage control commands, including: When the residual release marker is present, the control bypass valve keeps the bypass discharge path open; The residual release marker is removed when the concentration response of the sector to be detected is not higher than that of the baseline sector, the dew point response of the sector to be detected is not higher than that of the baseline sector, and the indoor dew point margin reaches the safe dew point margin. When the residual release marker is removed and the bypass valve position feedback is valid, control the bypass valve to switch to the normal heat and moisture recovery path; Based on the presence of residual release markers, a bypass valve adjustment command is generated. Based on the state that the dew point response of the sector to be detected is higher than that of the baseline sector, a dehumidification unit adjustment command and a reheat unit adjustment command are generated.

10. An explosion-proof air conditioner intelligent temperature control system, employing the explosion-proof air conditioner intelligent temperature control method as described in any one of claims 1-9, characterized in that, include: The sector writing module acquires the heat and humidity recovery operation records of the explosion-proof air conditioner. The heat and humidity recovery operation records include the process of the concentration of combustible volatile organic compounds on the exhaust side exceeding the limit, the rotor angle process, the heat and humidity process of the fresh and exhaust air, and the indoor dew point process. The heat and humidity recovery operation records are written into continuous sectors according to the angle position of the heat and humidity energy recovery rotor to generate sector operation records. The exposure record module calculates the exposure amount of each sector based on the sector operation record, writes the process of the exhaust side combustible volatile organic compound concentration exceeding the limit into the corresponding sector, and then corrects the exposure amount according to the sector dwell process and the change of exhaust humidity to generate a sector exposure record that records the sector exposure value. The bypass condition module processes sector exposure records along the rotation direction of the heat and moisture energy recovery wheel, filters baseline sectors, and forms a detection threshold based on the fluctuation range of sector exposure values ​​of the baseline sectors. Sectors that are about to switch to the fresh air side and whose sector exposure values ​​reach the detection threshold are recorded as sectors to be detected. Based on the heat and humidity process of the fresh exhaust air and the indoor dew point process, bypass detection conditions are generated, including detection speed and bypass discharge status. The linkage adjustment module drives the heat and moisture energy recovery wheel and controls the bypass valve according to the bypass detection conditions, so that the fresh air detection airflow passing through the sector to be detected enters the bypass discharge path. The concentration response and dew point response of the sector to be detected are compared with the concentration response and dew point response of the baseline sector to generate a residual release marker. The bypass discharge path is maintained when the residual release mark is present, and normal heat and humidity recovery is opened when the residual release mark is removed, and linkage adjustment commands are output to the bypass valve, dehumidification unit and reheat unit.

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