Air conditioner heating control method and system

Abstract

The invention relates to an air conditioner heating system method and system.The method comprises the first judgment step, specifically, whether the state of a temperature switch is switched off or not is judged, if yes, a preheater stops running, a fan continuously runs for the first preset time, and the switching-off frequency of the switch is accumulated one time; a second judgment step: judging whether the temperature switch is closed or not within a second preset time, and if not, locking the preheater; if yes, the preheater is started, and the number of faults is accumulated once; and a cyclic judgment step: returning to the first judgment step under the condition that the temperature switch is closed and the preheater is started, sequentially carrying out cyclic judgment in the first judgment step and the second judgment step, simultaneously judging whether the accumulated fault frequency is greater than a first frequency threshold, and if yes, locking the preheater, or otherwise, locking the temperature switch. And judging whether the accumulated switch-off frequency is greater than a second frequency threshold value or not, and if so, locking the preheater. Through the application, the problems of low error-tolerant rate and low reliability are solved, and the effects of reducing energy consumption and improving safety performance are achieved.

Description

Technical Field

[0001] The present application relates to the field of air conditioning control, and in particular to an air conditioning heating control method and system. Background Art

[0002] The train's air conditioning unit heating system consists of an evaporator fan and an air preheater. The air preheater generates heat through resistance, and the evaporator fan runs to form an air duct, and brings the heat generated by the air preheater into the air conditioning duct, thereby achieving the heating function and also cooling the air preheater.

[0003] In the prior art, after receiving the temperature switch action signal of the heating system, the air-conditioning controller of the existing centralized power train and ordinary passenger car stops the preheater and reports a fault lock, requiring manual confirmation and manual reset.

[0004] At present, in the related technology, in the preheater protection, once disconnected, manual recovery is required, which frequently consumes manpower and time. The related technology has the problems of low fault tolerance and low reliability. Summary of the invention

[0005] The embodiments of the present application provide an air conditioning and heating control method and system to at least solve the problems of low fault tolerance and low reliability in the related art.

[0006] In a first aspect, an embodiment of the present application provides an air conditioning heating control method, comprising:

[0007] The first judgment step is to judge whether the state of the temperature switch is disconnected. If so, the preheater stops running, the fan continues to run for a first preset time, and the number of times the switch is disconnected is accumulated once;

[0008] The second judgment step is to judge whether the temperature switch is closed within the second preset time. If not, the preheater is locked; if so, the preheater is started and the number of faults is accumulated once;

[0009] The step of loop judgment is to return to the first judgment step when the temperature switch is closed and the preheater is started. The first judgment step and the second judgment step are looped and judged in sequence. At the same time, it is judged whether the accumulated number of faults is greater than the first number threshold. If so, the preheater is locked, or it is judged whether the accumulated number of switch disconnections is greater than the second number threshold. If so, the preheater is locked.

[0010] According to the state of the temperature switch, the preheater operation state is controlled to improve the safety of operation. The cycle judgment further improves the protection mechanism.

[0011] In some embodiments, it also includes:

[0012] Obtaining the wind pressure inside the air duct and comparing it with a wind pressure threshold;

[0013] When the wind pressure inside the air duct is greater than or equal to a wind pressure threshold, the preheater keeps running; or,

[0014] When the wind pressure inside the air duct is less than a wind pressure threshold, the preheater stops running.

[0015] By detecting the wind pressure inside the air duct, when the wind pressure is less than a certain wind pressure threshold, the preheater is stopped to avoid equipment damage caused by abnormal wind pressure.

[0016] In some embodiments, it also includes:

[0017] Compare the temperature of the temperature switch with a temperature threshold, if the temperature of the temperature switch is higher than or equal to the first temperature threshold, increase the fan speed; if the temperature of the temperature switch is lower than or equal to the second temperature threshold, reduce the fan speed; or,

[0018] Calculate and adjust the fan speed according to the temperature of the temperature switch.

[0019] Dynamically adjusting the fan speed according to the temperature of the temperature switch can improve energy-saving efficiency and control energy consumption.

[0020] In some embodiments, the step of calculating and adjusting the fan speed according to the temperature of the temperature switch includes:

[0021] Fan speed R t The calculation formula is: t =[(R max -R min ) / 60]*T t +R min ;

[0022] Among them, R min is the maximum speed of the fan, R max is the minimum speed of the fan, T t is the temperature of the temperature switch.

[0023] The fan speed changes in real time with the temperature of the temperature switch, which can improve the responsiveness to temperature.

[0024] In some embodiments, two preheaters and two temperature switches are included, and it is determined whether any temperature switch is disconnected. If so, the two preheaters stop running and enter the first determination step.

[0025] By monitoring the status of the two temperature switches, either temperature switch can respond, thereby improving response speed and safety performance.

[0026] In some embodiments, the cyclic determination step further includes: if the temperature switch is determined to be closed for two consecutive times, the accumulated number of faults is reset to zero.

[0027] After the abnormality is recovered, the accumulated number of failures can be automatically cleared, reducing the need for manual intervention and saving human resources.

[0028] In a second aspect, an embodiment of the present application provides an air conditioning heating control system, the system comprising an air conditioner, a preheater, a temperature switch, a fan and a controller built into the air conditioner, the controller being connected to and controlling the preheater and the fan, comprising:

[0029] A first judgment module is configured to judge whether the temperature switch is disconnected and generate first judgment information;

[0030] A second judgment module is configured to judge whether the temperature switch is closed within a preset time and generate second judgment information;

[0031] The controller is connected to the first judgment module, receives the first judgment information, and when the first judgment information indicates that the temperature switch is disconnected, controls the preheater to stop running, and controls the fan to continue running for a first preset time;

[0032] The controller is connected to the second judgment module, receives the second judgment information, and controls the preheater to stop running and lock when the second judgment information is that the temperature switch is not closed; and controls the preheater to start when the second judgment information is that the temperature switch is closed.

[0033] The flexibility of the air-conditioning and heating system is improved by the joint operation of multiple judgment modules and controllers.

[0034] In some embodiments, the first judgment module and the second judgment module make judgments in a loop in sequence, and the control system further includes:

[0035] The monitoring component is configured to, during the cyclic judgment process, accumulate the number of switch disconnections once when the first judgment information is that the temperature switch is disconnected; accumulate the number of faults once when the second judgment information is that the temperature switch is closed and the controller controls the preheater to start; clear the accumulated number of faults when the temperature switch is judged to be closed twice in succession; and generate monitoring information for indicating accumulated switch disconnections and faults;

[0036] The controller is connected to the monitoring component and receives monitoring information. When the monitoring information shows that the accumulated number of switch disconnections is greater than the second number threshold, or when the monitoring information shows that the accumulated number of failures is greater than or equal to the first number threshold, the controller controls the preheater to lock and sends an alarm message to the air conditioning and heating control system.

[0037] By monitoring the status of the temperature switch in real time through the monitoring component, the fault diagnosis mechanism can be further improved and equipment damage can be reduced.

[0038] In some of the embodiments, the air conditioner further includes an air duct, the air duct is connected to the air outlet of the fan, and a wind pressure sensor is arranged at the connection between the air duct and the air outlet of the fan to detect the wind pressure inside the air duct, and further includes:

[0039] The wind pressure detection module is connected to the wind pressure sensor and the controller, and is configured to receive the wind pressure inside the wind duct, compare the wind pressure inside the wind duct with a wind pressure threshold, and generate a comparison result;

[0040] The controller is further configured to receive a comparison result, and control the preheater to operate when the comparison result is that the wind pressure inside the air duct is greater than or equal to a wind pressure threshold; and control the preheater to stop operating when the comparison result is that the wind pressure inside the air duct is less than a wind pressure threshold.

[0041] Through real-time wind pressure detection, energy consumption and overheating risks under abnormal conditions are reduced, thereby improving the safety performance of the system.

[0042] In some embodiments, the air conditioner has a built-in temperature sensor for detecting the temperature of the temperature switch, and the controller further comprises:

[0043] The speed adjustment module is connected to the temperature sensor and is configured to receive the temperature of the temperature switch, compare the temperature of the temperature switch with a temperature threshold, and control the fan to run at high speed when the temperature of the temperature switch is higher than or equal to the temperature threshold; and control the fan to run at low speed when the temperature of the temperature switch is lower than or equal to another temperature threshold.

[0044] The speed adjustment module can be used to adjust the fan speed in real time, thus reducing energy consumption.

[0045] Compared with the related art, the air conditioning and heating control method and system provided in the embodiment of the present application adjusts the operation of the preheater and the fan in real time through the state of the temperature switch and the wind pressure, thereby solving the problems of low fault tolerance and low reliability, and achieving the effect of reducing energy consumption and improving safety performance.

[0046] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0048] Figure 1is a flow chart of an air conditioning and heating control method according to an embodiment of the present application;

[0049] Figure 2 is another flow chart of the air conditioning and heating control method according to an embodiment of the present application;

[0050] Figure 3 is a structural schematic diagram of an air conditioning and heating control system according to an embodiment of the present application;

[0051] Figure 4 is another structural schematic diagram of an air conditioning and heating control system according to an embodiment of the present application;

[0052] Figure 5 is another structural schematic diagram of an air conditioning and heating control system according to an embodiment of the present application;

[0053] Figure 6 is another structural schematic diagram of an air conditioning and heating control system according to an embodiment of the present application;

[0054] Figure 7 is a schematic diagram of the structure of a controller in an air conditioning and heating control system according to an embodiment of the present application;

[0055] Figure 8 It is a schematic diagram of the structure of the known prior art air conditioning system;

[0056] Fig. 9 It is a known prior art power concentrated EMU and ordinary speed passenger car air conditioning power supply topology diagram;

[0057] Fig.10 It is a topological structure diagram of the air conditioning control of a known prior art centralized power train and a conventional passenger car;

[0058] Fig.11 This is the topological structure diagram of the improved air conditioning control loop of this application. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0060] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0061] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0062] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0063] The structural principle of the known prior art air conditioning system is as follows Figure 8As shown, the air conditioning system structure includes: an evaporating fan 1, a preheater 2, a low-pressure pressure switch 3, a gas-liquid separator 4, a capillary tube 5, a drying filter 6, a scroll compressor 7, a high-pressure pressure switch 8, a bypass solenoid valve 9, an evaporator 10, a condensing fan 11, and a condenser 12.

[0064] In the prior art, the heating system of the air conditioner unit is composed of an evaporator fan 1 and a preheater 2. The preheater 2 generates heat through resistance, and the evaporator fan 1 runs at a low speed to form an air duct, and brings the heat generated by the preheater 2 into the air duct of the air conditioner, thereby realizing the heating function and dissipating the heat of the preheater 2 at the same time.

[0065] The air conditioning unit is provided with two independent heating systems, which are mainly composed of a low-speed evaporating fan 1 and two sets of preheaters 2. Each set of preheaters 2 is provided with a temperature switch FT1 and a temperature switch FT2 for protecting the preheaters 2.

[0066] As shown in Table 1, both sets of temperature switches are self-resetting switches. When the internal temperature of the corresponding preheater 2 is higher than the action value, the corresponding temperature switch is disconnected; when the internal temperature of the preheater 2 is lower than the recovery value, the temperature switch is automatically closed. The status signal of the temperature switch is connected to the air conditioning controller.

[0067] Table 1

[0068] Action Value Recovery Value Temperature switch 70℃±5℃ 50℃±5℃

[0069] The known prior art power concentrated EMU and ordinary speed passenger car air conditioning power supply topology is as follows Fig. 9 shown.

[0070] The air conditioning unit is powered by AC380V and controlled by the air conditioning controller. The KM18 contactor and the KM19 contactor are mainly used to control the input and output of preheaters 1 and 2; KM11 is for the low speed of the evaporator fan, which is used for the heat dissipation of the preheater; KM12 is for the high speed of the evaporator fan, which is mainly used for the refrigeration system of the air conditioning unit. The normally closed contact of the KM12 contactor is interlocked with the coils of the preheater contactor KM18 and the contactor KM19. When the KM12 contactor is energized, the evaporator fan runs at high speed and the preheater cannot work. That is, when the preheater of the existing power concentrated EMU and ordinary passenger car air conditioners is working, the evaporator fan can only run at low speed; in the cooling condition, the evaporator fan can only run at high speed.

[0071] The known prior art power centralized EMU and ordinary speed passenger car air conditioning control topology is as follows Fig.10 shown.

[0072] The air conditioning controller can realize the low-speed operation and stop switching of the preheater and evaporating fan by controlling the coil of the air conditioning power supply contactor according to the control target temperature value. When the air conditioning controller has output, if the KM12 contactor is disconnected at this time, the evaporating fan is not running at high speed, the KM11 contactor is energized, the evaporating fan runs at low speed, and the temperature switch FT1 or FT2 does not act, KM18 and KM19 are energized and energized. If the temperature switch FT1 or FT2 of the heating system acts at this time, the corresponding relay KA13 or KA14 is energized and energized, and the fault signal is transmitted to the air conditioning controller through the auxiliary contacts of the relay KA13 or KA14. The corresponding control channel of the air conditioning controller stops output, and KM18 or KM19 loses power and releases. The heating system protects the preheater through the temperature switch.

[0073] The existing protection logic of the air-conditioning controller includes: after receiving the action signal of the temperature switch FT1 or FT2 of the heating system, the air-conditioning controller of the existing power centralized EMU and conventional passenger car stops the preheater and reports a fault and locks, requiring manual confirmation and manual reset.

[0074] When the train is running, the pressure of the air-conditioning unit system is affected by the intensity of solar radiation, the temperature fluctuation of the mixed wind, and the fluctuation of ventilation volume and wind pressure during the train operation, and the temperature switch is occasionally triggered. Although the existing protection logic has a high safety factor, it has low system redundancy and low fault tolerance, which reduces the reliability of the system; after the protection mechanism is triggered and the preheater is locked, it needs to be manually reset, which increases the workload of the crew; if it is not discovered in time or not manually reset in time, it will reduce the comfort of passengers; it is impossible to exert the ultimate performance of the air-conditioning system, resulting in configuration waste.

[0075] In order to solve the above problems, the present invention provides an air conditioning heating control method and system.

[0076] refer to Fig.11 ,First, the improved air conditioning control loop topology structure of ,the present invention is introduced.

[0077] The present application adds a wind pressure detection contact "FY" to the coil control circuit of the preheater contactors KM18 and KM19, and the contact "FY" is located on the parallel branch of the contactors KM18 and KM19. The air conditioning controller generates a control signal for the contact "FY" based on the detected wind pressure. When the wind pressure is abnormal, the contact "FY" is disconnected, which can forcibly cut off the hard-wired circuit, realize dual redundancy with software control, prevent the preheater from dry burning and then protect the temperature switch. The present application also deletes the normally closed contact of KM12 and adds a parallel contact of KM12 strong wind, so that when the preheater is working, the evaporating fan can be operated at high speed or low speed, so that high and low speed switching can be performed according to the real-time temperature, which is conducive to controlling the preheater temperature. At the same time, a temperature sensor PT1000 is added next to the temperature switches of the two preheater units to monitor the temperature near the temperature switch in real time. When the temperature exceeds the set threshold, the temperature switch is disconnected.

[0078] In a first aspect, this embodiment first provides an air conditioning heating control method. Figure 1 is a flow chart of an air conditioning and heating control method according to an embodiment of the present application, such as Figure 1 As shown, the process includes the following steps:

[0079] The first judgment step S101 is to judge whether the state of the temperature switch is disconnected. If so, the preheater stops running, the fan continues to run for a first preset time, and the number of times the switch is disconnected is accumulated once.

[0080] The second judgment step S102 is to judge whether the temperature switch is closed within the second preset time, if not, the preheater is locked. If yes, the preheater is started and the number of faults is accumulated once.

[0081] Loop judgment step S103, when the temperature switch is closed and the preheater is started, return to the first judgment step, the first judgment step and the second judgment step are looped and judged in sequence, and at the same time, it is judged whether the accumulated number of faults is greater than the first number threshold. If so, the preheater is locked, or, it is judged whether the accumulated number of switch disconnections is greater than the second number threshold. If so, the preheater is locked.

[0082] By configuring a temperature switch for the preheater, this method determines the status of the temperature switch multiple times to ensure that the preheater and the fan can operate normally when the temperature switch is working properly. In abnormal situations, if the switch is opened or closed too many times, or the cumulative number of failures exceeds the threshold, the preheater will be locked in time to improve safety performance. The delayed shutdown operation of the fan can further ensure the transition cooling of the system when a failure occurs, avoiding potential damage caused by sudden stop.

[0083] By dynamically monitoring the temperature switch status and preheater operating conditions, the safety and reliability of the equipment are ensured. In multiple judgment cycles, the operating efficiency is improved and a safety protection mechanism is provided for the equipment. The system stability is further optimized through multi-threshold control.

[0084] The first preset time and the second preset time can be adjusted according to the requirements of different air-conditioning models and actual needs.

[0085] The reset logic of the fault number can be set to be executed after each successful closure of the temperature switch for a period of time, thereby further optimizing the accuracy of fault judgment.

[0086] In some embodiments, such as Figure 2 As shown, the method also includes:

[0087] S201, obtaining the wind pressure inside the air duct and comparing it with a wind pressure threshold.

[0088] S2021: When the wind pressure inside the air duct is greater than or equal to a wind pressure threshold, the preheater keeps running. Or,

[0089] S2022: When the wind pressure inside the air duct is less than a wind pressure threshold, the preheater stops running.

[0090] By real-time monitoring of the wind pressure inside the air duct, the preheater will continue to operate to ensure the heating effect when the wind pressure is normal. When the wind pressure is too low, the preheater will stop running to avoid energy waste and potential overheating risks.

[0091] The wind pressure detection optimizes the preheater operation efficiency and improves the overall energy utilization of the air conditioning system. At the same time, the protection mechanism of stopping operation avoids equipment damage caused by abnormal wind pressure.

[0092] The wind pressure threshold can be adjusted according to the air conditioner model and preheater capacity to suit different usage scenarios.

[0093] In some embodiments, the method further comprises:

[0094] Compare the temperature of the temperature switch with a temperature threshold, if the temperature of the temperature switch is higher than or equal to the first temperature threshold, then increase the fan speed. If the temperature of the temperature switch is lower than or equal to the second temperature threshold, then reduce the fan speed. Or,

[0095] Calculate and adjust the fan speed according to the temperature of the temperature switch.

[0096] By detecting the temperature of the temperature switch in real time and judging it based on the preset temperature threshold, the fan speed is adjusted dynamically to optimize the coordinated operation of the fan and preheater. At higher temperatures, the fan speed is increased to speed up heat transfer and improve heating efficiency. At lower temperatures, the fan speed is reduced to save energy and maintain equipment stability.

[0097] Through the temperature-based dynamic speed adjustment mechanism, an efficient and energy-saving operation mode is achieved, improving the heating performance of the air conditioner. For different temperature conditions, the equipment can balance the heating effect and energy consumption in the optimal operating state.

[0098] The temperature threshold can be adjusted according to the use environment or regional requirements of the air conditioner to adapt to temperature changes in different seasons or regions.

[0099] The fan speed adjustment logic can be added with a time delay to prevent frequent switching due to temperature fluctuations, further extending the fan life.

[0100] In some embodiments, the step of calculating and adjusting the fan speed according to the temperature of the temperature switch includes:

[0101] Fan speed R t The calculation formula is: t =[(R max -R min ) / 60]*T t +R min .

[0102] Among them, R min is the maximum speed of the fan, R max is the minimum speed of the fan, T t is the temperature of the temperature switch.

[0103] Through the above formula, the fan speed can be adjusted linearly according to the real-time temperature of the temperature switch. With a smooth transition from low speed to high speed, it responds to temperature changes more accurately and maintains the best heating efficiency.

[0104] After adopting the linear adjustment algorithm, the fan speed can change accurately with the temperature change, avoiding the efficiency loss and poor user experience caused by traditional fixed gear control. At the same time, the smooth transition of speed also reduces the fan operation noise.

[0105] The fan speed calculation formula can be changed to a piecewise function form to achieve nonlinear speed regulation effect under specific conditions.

[0106] In some embodiments, two preheaters and two temperature switches are included, each temperature switch corresponds to a temperature switch, and when the temperature of the preheater corresponding to the temperature switch exceeds a set temperature threshold, the temperature switch is disconnected. It is determined whether any temperature switch is disconnected, and if so, the two preheaters stop running and enter the first judgment step.

[0107] By real-time monitoring of the status of the two temperature switches, the system can ensure that when any temperature switch is disconnected, the operation of the two preheaters will be stopped in time, thereby protecting the safety of the equipment. Combined with the loop mechanism of the first judgment step, the coordination of dynamic adjustment and fault management is achieved.

[0108] The dual preheater and dual temperature switch design improves the reliability of the system. If any switch fails, it can respond quickly to avoid equipment damage or safety hazards. At the same time, this redundant design can also provide higher safety protection in the event of a single switch failure.

[0109] The number of preheaters can be increased to more groups according to actual needs, including but not limited to three or four groups, to meet the heating needs of larger air ducts. Accordingly, the number of temperature switches can be configured according to the number of preheaters.

[0110] In some embodiments, the cyclic determination step further includes: if the temperature switch is determined to be closed twice in a row, the accumulated number of faults is reset to zero.

[0111] By adding the logic of clearing the number of faults, the previous fault records will be cleared after the temperature switch resumes normal operation, avoiding misjudgment and misoperation caused by short-term faults. This further optimizes the system's fault tolerance and improves the stability of long-term operation.

[0112] After the abnormality is recovered, the accumulated fault times can be automatically cleared, reducing the need for manual intervention and preventing the normal operation of the equipment from being affected by historical fault data. By improving the intelligent level of fault management, the safety and reliability of the system are significantly enhanced.

[0113] The fault clearing logic can add a time condition and can be set to perform the clearing operation when the temperature switch remains closed for a continuous period of time to improve the accuracy of the judgment.

[0114] By adding a history record storage module, the fault status before clearing can be recorded for subsequent maintenance analysis.

[0115] It should be noted that the steps shown in the above process or the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0116] The second aspect of this embodiment further provides an air conditioning and heating control system for implementing the above-mentioned embodiments and preferred implementation modes, which have been described and will not be repeated here. As used below, the terms "module", "unit", "subunit", etc. can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0117] Figure 3 is a structural schematic diagram of an air conditioning and heating control system according to an embodiment of the present application, the system includes an air conditioner, a preheater built in the air conditioner, a temperature switch, a fan and a controller, the controller is connected to and controls the preheater and the fan, such as Figure 3 As shown, the system includes:

[0118] The first judgment module 301 is configured to judge whether the temperature switch is disconnected and generate first judgment information.

[0119] The second judgment module 302 is configured to judge whether the temperature switch is closed within a preset time and generate second judgment information.

[0120] The controller 303 is connected to the first judgment module 301, receives the first judgment information, and controls the preheater to stop running and controls the fan to continue running for a first preset time when the first judgment information indicates that the temperature switch is disconnected.

[0121] The controller 303 is connected to the second judgment module 302, receives the second judgment information, and controls the preheater to stop running and lock when the second judgment information indicates that the temperature switch is not closed. When the second judgment information indicates that the temperature switch is closed, the preheater is controlled to start.

[0122] The system realizes dynamic monitoring and processing of the temperature switch state through modular design. The first judgment module 301 and the second judgment module 302 respectively detect the open and closed states of the switch, and coordinate the operation logic of the preheater and the fan through the controller 303, thereby forming an intelligent heating control system.

[0123] Through this system, the maintainability and scalability of the air conditioning and heating system are significantly improved. At the same time, by using the integrated logic of the controller 303, rapid response and precise control can be achieved, improving the operating efficiency of the equipment and enhancing the user experience.

[0124] The first judgment module 301 and the second judgment module 302 can be combined into a multifunctional detection module, which distinguishes the open and closed states through internal logic to reduce hardware requirements.

[0125] The controller 303 can add intelligent algorithm support, including optimizing the control strategy through historical data analysis, to further improve the system operation efficiency.

[0126] In some embodiments, such as Figure 4 As shown, the first judgment module and the second judgment module make judgments in a loop in sequence, and the control system further includes:

[0127] The monitoring component 401 is configured to accumulate the number of switch disconnections once when the first judgment information is that the temperature switch is disconnected during the cyclic judgment process. When the second judgment information is that the temperature switch is closed and the controller controls the preheater to start, the number of faults is accumulated once. When the temperature switch is judged to be closed twice in succession, the accumulated number of faults is cleared. Monitoring information for indicating accumulated switch disconnections and faults is generated.

[0128] The controller 303 is connected to the monitoring component 401 and receives monitoring information. When the monitoring information shows that the accumulated number of switch disconnections is greater than the second number threshold, or when the monitoring information shows that the accumulated number of failures is greater than or equal to the first number threshold, the controller 303 controls the preheater to lock and sends an alarm message to the air conditioning and heating control system.

[0129] The monitoring component 401 provides refined fault management capabilities by real-time tracking and accumulation of the temperature switch status. When the accumulated number exceeds the threshold, the controller 303 can quickly lock the preheater and sound an alarm to ensure that the equipment is safely shut down under abnormal conditions.

[0130] The system can detect and respond to potential problems at an early stage through efficient monitoring and fault judgment mechanisms, effectively reducing equipment damage and safety hazards. Through the alarm function, users can be informed of fault conditions in a timely manner, improving maintenance convenience.

[0131] The monitoring component 401 may integrate a remote communication function to transmit alarm information to a remote device or a cloud platform to facilitate real-time monitoring and remote maintenance.

[0132] Additional fault number clearing conditions may be added, including but not limited to automatic clearing when there is no abnormality for a long period of time, to further optimize system operation.

[0133] In some of the embodiments, the air conditioner further includes an air duct, the air duct is connected to the air outlet of the fan, and a wind pressure sensor is arranged at the connection between the air duct and the air outlet of the fan to detect the wind pressure inside the air duct, and further includes:

[0134] The wind pressure detection module 501 is connected to the wind pressure sensor and the controller 303, and is configured to receive the wind pressure inside the air duct, and compare the wind pressure inside the air duct with a wind pressure threshold to generate a comparison result.

[0135] The controller 303 is further configured to receive the comparison result, and control the preheater to operate if the comparison result shows that the wind pressure inside the air duct is greater than or equal to a wind pressure threshold, or to stop the preheater if the comparison result shows that the wind pressure inside the air duct is less than a wind pressure threshold.

[0136] By detecting the actual wind pressure inside the air duct through the wind pressure sensor and comparing it with the set wind pressure threshold, the wind pressure detection module 501 can determine the current air circulation situation in the air duct in real time. Based on the comparison result, the preheater operates within the appropriate wind pressure range to ensure the heating efficiency and safety of the equipment.

[0137] This module optimizes the operating conditions of the preheater and reduces energy consumption and overheating risks under abnormal conditions through real-time wind pressure detection, thereby improving the safety of system operation and energy-saving effects.

[0138] The wind pressure threshold can be adjusted according to the needs of different air conditioning systems to adapt to a wider range of operating environments.

[0139] The wind pressure detection module 501 can be integrated with the temperature monitoring function to comprehensively control the preheater based on multi-dimensional parameters.

[0140] In some embodiments, such as Figure 6 As shown, the air conditioner has a built-in temperature sensor for detecting the temperature of the temperature switch, and the controller 303 also includes:

[0141] The speed adjustment module 601 is connected to the temperature sensor and is configured to receive the temperature of the temperature switch, compare the temperature of the temperature switch with a temperature threshold, and control the fan to run at a high speed when the temperature of the temperature switch is higher than or equal to the temperature threshold. When the temperature of the temperature switch is lower than or equal to another temperature threshold, the fan is controlled to run at a low speed.

[0142] The module dynamically adjusts the fan speed by detecting the temperature change of the temperature switch. When the temperature is high, the fan runs at high speed to enhance the heating effect. When the temperature is low, the fan runs at low speed to save energy and extend the life of the equipment.

[0143] Through the speed adjustment module, the system realizes the function of adjusting the fan operating status in real time according to the temperature, which not only improves the heating efficiency but also reduces energy consumption, further optimizing the user experience and equipment life.

[0144] The speed adjustment module 601 may be added with a humidity monitoring function to comprehensively consider the impact of humidity and temperature on the fan speed.

[0145] Temperature threshold settings can be dynamically adjusted based on user needs and can also be set via a mobile app or remote control platform.

[0146] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0147] In an actual application scenario, a wind pressure sensor is set in the air duct of the air conditioner to detect whether the wind pressure in the air duct of the air conditioner is normal. The wind pressure sensor is provided with an auxiliary contact. The air conditioner is provided with a controller, two preheaters, temperature switches corresponding to the two preheaters, a contactor KM18 of one preheater, and a contactor KM19 of the other preheater.

[0148] The controller collects wind pressure signals through the wind pressure sensor. Set the wind pressure threshold according to actual needs. When the wind pressure is greater than the wind pressure threshold, the wind pressure is normal and the auxiliary contact is turned on. When the wind pressure is less than the wind pressure threshold, the wind pressure is abnormal and the auxiliary contact is turned off. The wind pressure may be abnormal due to abnormal operation of the evaporator fan or fluctuations in the duct ventilation volume and internal wind pressure due to external factors during operation.

[0149] At this time, the controller cuts off the hard wire loop by controlling the coils of contactor KM18 of one preheater and contactor KM19 of the other preheater, and the preheater stops running to prevent the preheater from dry burning.

[0150] The contactor KM12 in the prior art is deleted from the air conditioner of the present application, the forced interlocking relationship between the normally closed contact of the KM12 contactor and the coils of KM18 and KM19 is cancelled, and a temperature sensor is set next to the temperature switch of each of the two preheaters to monitor the temperature of the temperature switch in real time. The fan in the air conditioner can be set to an evaporating fan. When the temperature detected by the temperature sensor is greater than or equal to 60°C, the evaporating fan runs at high speed to increase the ventilation volume. When the temperature detected by the temperature sensor is less than or equal to 50°C, the evaporating fan runs at low speed. Alternatively, the fan in the air conditioner can be set to a variable frequency fan, and the fan speed is adjusted in real time according to the temperature detected by the temperature sensor.

[0151] According to actual needs, set the first count threshold and the second count threshold. During the cyclic judgment process, when any temperature switch is disconnected, the temperature switch disconnection count increases by 1, and the two preheaters stop running. At this time, the timing starts. Within the first 10 minutes, the preheater stops running, and the evaporator fan keeps running. If the temperature switch cannot be closed within the first 10 minutes, the two preheaters are locked and the preheaters stop running. If the temperature switch automatically recovers after the first 10 minutes, the two preheaters restart and the number of faults increases by 1. When the temperature switch automatically recovers, the preheater starts running and restarts the timing for 10 minutes. If the temperature switch does not disconnect within this 10 minutes, the number of faults is reset. If the temperature switch disconnection count is greater than the second count threshold or if the number of faults is greater than the first count threshold, the power supply to the two preheaters is cut off and the fault is locked. The cause needs to be found out and manually confirmed and cleared before the preheater restarts.

[0152] Figure 7 Schematic diagram of the hardware structure of the controller in the air conditioning and heating control system according to the embodiment of the present application.

[0153] The controller in the air conditioning and heating control system may include a processor 81 and a memory 82 storing computer program instructions.

[0154] Specifically, the processor 81 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0155] Among them, the memory 82 may include a large-capacity memory for data or instructions. By way of example and not limitation, the memory 82 may include a hard disk drive (HDD), a floppy disk drive, a solid-state drive (SSD), a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 82 may include a removable or non-removable (or fixed) medium. Where appropriate, the memory 82 may be inside or outside the data processing device. In a specific embodiment, the memory 82 is a non-volatile memory. In a specific embodiment, the memory 82 includes a read-only memory (ROM) and a random access memory (RAM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (Programmable Read-Only Memory, PROM for short), an erasable PROM (Erasable Programmable Read-Only Memory, EPROM for short), an electrically erasable PROM (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), an electrically alterable ROM (Electrically Alterable Read-Only Memory, EAROM for short) or a flash memory (FLASH) or a combination of two or more of these. Under appropriate circumstances, the RAM can be a static random access memory (SRAM) or a dynamic random access memory (DRAM), wherein the DRAM can be a fast page mode dynamic random access memory (FPMDRAM), an extended data output dynamic random access memory (EDODRAM), a synchronous dynamic random access memory (SDRAM), etc.

[0156] The memory 82 may be used to store or cache various data files required for processing and / or communication, as well as possible computer program instructions executed by the processor 81 .

[0157] The processor 81 implements any one of the air conditioning and heating control methods in the above embodiments by reading and executing computer program instructions stored in the memory 82 .

[0158] In some embodiments, the controller in the air conditioning and heating control system may further include a communication interface 83 and a bus 80. Figure 7 As shown, the processor 81, the memory 82, and the communication interface 83 are connected via a bus 80 and communicate with each other.

[0159] The communication interface 83 is used to implement communication between the modules, devices, units and / or equipment in the embodiment of the present application. The communication interface 83 can also implement data communication with other components such as: external devices, image / data acquisition equipment, databases, external storage, and image / data processing workstations.

[0160] The bus 80 includes hardware, software or both, and couples the components of the air conditioning and heating control system to each other. The bus 80 includes but is not limited to at least one of the following: a data bus, an address bus, a control bus, an expansion bus, and a local bus. By way of example and not limitation, bus 80 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses or a combination of two or more of these. Where appropriate, bus 80 may include one or more buses. Although embodiments of the present application describe and illustrate a particular bus, the present application contemplates any suitable bus or interconnect.

[0161] The air conditioning and heating control system can execute the air conditioning and heating control method in the embodiment of the present application based on the acquired information, thereby realizing the combination Figure 1 The air conditioning and heating control method described.

[0162] In addition, in combination with the air conditioning and heating control method in the above embodiments, the embodiment of the present application can provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the air conditioning and heating control methods in the above embodiments is implemented.

[0163] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0164] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An air conditioning heating control method, characterized in that: include: The first judgment step is to judge whether the state of the temperature switch is disconnected. If so, the preheater stops running, the fan continues to run for a first preset time, and the number of times the switch is disconnected is accumulated once; The second judgment step is to judge whether the temperature switch is closed within the second preset time. If not, the preheater is locked; if so, the preheater is started and the number of faults is accumulated once; The step of loop judgment is to return to the first judgment step when the temperature switch is closed and the preheater is started. The first judgment step and the second judgment step are looped and judged in sequence. At the same time, it is judged whether the accumulated number of faults is greater than the first number threshold. If so, the preheater is locked, or it is judged whether the accumulated number of switch disconnections is greater than the second number threshold. If so, the preheater is locked.

2. The air conditioning heating control method according to claim 1, characterized in that: Also includes: Obtaining the wind pressure inside the air duct and comparing it with a wind pressure threshold; When the wind pressure inside the air duct is greater than or equal to a wind pressure threshold, the preheater keeps running; or, When the wind pressure inside the air duct is less than a wind pressure threshold, the preheater stops running.

3. The air conditioning heating control method according to claim 1, characterized in that: Also includes: Comparing the temperature of the temperature switch with a temperature threshold, and if the temperature of the temperature switch is higher than or equal to the first temperature threshold, increasing the fan speed; If the temperature of the temperature switch is lower than or equal to the second temperature threshold, reducing the fan speed; or, Calculate and adjust the fan speed according to the temperature of the temperature switch.

4. The air conditioning heating control method according to claim 3, characterized in that: The step of calculating and adjusting the fan speed according to the temperature of the temperature switch includes: Fan speed R t The calculation formula is: t =[(R max -R min ) / 60]*T t +R min ; Among them, R min is the maximum speed of the fan, R max is the minimum speed of the fan, T t is the temperature of the temperature switch.

5. The air conditioning heating control method according to claim 1, characterized in that: It includes two preheaters and two temperature switches, and determines whether any temperature switch is disconnected. If so, the two preheaters stop running and enter the first judgment step.

6. The air conditioning heating control method according to claim 1, characterized in that: The cyclic determination step further includes: if the temperature switch is determined to be closed twice in succession, the accumulated number of faults is reset to zero.

7. An air conditioning heating control system, the system comprising an air conditioner, a preheater, a temperature switch, a fan and a controller built in the air conditioner, the temperature switch is used to detect the temperature of the preheater, the controller is connected to and controls the preheater and the fan, characterized in that: include: A first judgment module is configured to judge whether the temperature switch is disconnected and generate first judgment information; A second judgment module is configured to judge whether the temperature switch is closed within a preset time and generate second judgment information; The controller is connected to the first judgment module, receives the first judgment information, and when the first judgment information indicates that the temperature switch is disconnected, controls the preheater to stop running, and controls the fan to continue running for a first preset time; The controller is connected to the second judgment module, receives the second judgment information, and controls the preheater to stop running and lock when the second judgment information is that the temperature switch is not closed; and controls the preheater to start when the second judgment information is that the temperature switch is closed.

8. The air conditioning and heating control system according to claim 7, characterized in that: The first judgment module and the second judgment module make judgments in a loop in sequence, and the control system further includes: The monitoring component is configured to, during the cyclic judgment process, accumulate the number of switch disconnections once when the first judgment information is that the temperature switch is disconnected; accumulate the number of faults once when the second judgment information is that the temperature switch is closed and the controller controls the preheater to start; clear the accumulated number of faults when the temperature switch is judged to be closed twice in succession; and generate monitoring information for indicating accumulated switch disconnections and faults; The controller is connected to the monitoring component and receives monitoring information. When the monitoring information shows that the accumulated number of switch disconnections is greater than the second number threshold, or when the monitoring information shows that the accumulated number of failures is greater than or equal to the first number threshold, the controller controls the preheater to lock and sends an alarm message to the air conditioning and heating control system.

9. The air conditioning and heating control system according to claim 8, characterized in that: The air conditioner also includes an air duct, which is connected to the air outlet of the fan. A wind pressure sensor is arranged at the connection between the air duct and the air outlet of the fan to detect the wind pressure inside the air duct, and also includes: The wind pressure detection module is connected to the wind pressure sensor and the controller, and is configured to receive the wind pressure inside the wind duct, compare the wind pressure inside the wind duct with a wind pressure threshold, and generate a comparison result; The controller is further configured to receive a comparison result, and control the preheater to operate when the comparison result is that the wind pressure inside the air duct is greater than or equal to a wind pressure threshold; and control the preheater to stop operating when the comparison result is that the wind pressure inside the air duct is less than a wind pressure threshold.

10. The air conditioning and heating control system according to claim 8, characterized in that: The air conditioner has a built-in temperature sensor for detecting the temperature of the temperature switch. The controller also includes: The speed adjustment module is connected to the temperature sensor and is configured to receive the temperature of the temperature switch, compare the temperature of the temperature switch with a temperature threshold, and control the fan to run at high speed when the temperature of the temperature switch is higher than or equal to the temperature threshold; and control the fan to run at low speed when the temperature of the temperature switch is lower than or equal to another temperature threshold.

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