Energy-saving control system and method for air compressor unit

Abstract

The application relates to the field of electric appliance energy saving, in particular to an air compressor unit energy saving control system and method, wherein the system comprises an air compressor unit used for compressing refrigerant to generate saturated gas; a frequency converter used for controlling the power frequency of each air compressor in the air compressor unit; a detection module used for detecting indoor temperature; a central processing unit used for acquiring the indoor temperature, processing a refrigeration temperature difference between the indoor temperature and a predicted refrigeration temperature, matching a corresponding proportion of the refrigeration temperature difference in a preset compressor working proportion table; and controlling the power frequency of the air compressor according to the proportion at a certain frequency. The application has the effect of conveniently improving the energy saving effect of the air compressor unit.

Description

Technical Field

[0001] This application relates to the field of energy conservation in electrical appliances, and in particular to an energy-saving control system and method for an air compressor unit. Background Technology

[0002] The compressor compresses the refrigerant into a saturated gas (ammonia or Freon), which is then condensed by the condenser. After being throttled by a throttling device, the gas is introduced into the evaporator to cool the medium. For example, the evaporator can be connected to various rooms in a building. The serpentine tubes inside the evaporator exchange heat with the air, and then the cool air is blown into the room by a blower.

[0003] In existing technologies, when refrigerating indoor spaces, inverters are often used to operate the connected air compressor unit at its highest operating frequency, thereby generating a large amount of saturated gas in a short period of time to achieve rapid indoor cooling.

[0004] In the process of developing this application, it was discovered that the above-mentioned technology has at least the following problems: During the indoor cooling stage, the frequency converter continuously controls the air compressor unit to operate at the maximum operating frequency, even when the indoor temperature is about to reach the expected cooling temperature. As a result, the indoor cooling process is still in progress when the indoor temperature has already reached the cooling temperature, which will cause the indoor temperature to drop further below the expected cooling temperature. At this time, the air compressor unit can only be stopped first to allow the indoor temperature to rise back to the expected cooling temperature before the air compressor unit can be restarted. This easily leads to a waste of electrical energy. It is evident that the energy-saving effect of the air compressor unit in the prior art needs to be improved. Summary of the Invention

[0005] To improve the energy efficiency of air compressor units, this application provides an energy-saving control system for air compressor units.

[0006] In a first aspect, this application provides an energy-saving control system for an air compressor unit, which adopts the following technical solution: An energy-saving control system for an air compressor unit, comprising: Air compressor units are used to compress refrigerant to generate saturated gas; A frequency converter is used to control the operating frequency of each air compressor in an air compressor unit. The detection module is used to detect indoor temperature; The central processing unit is used to acquire the indoor temperature, process the indoor temperature and the expected cooling temperature to generate a cooling temperature difference, match the cooling temperature difference to the corresponding proportion in the preset compressor operating ratio table, and control the operating frequency of the air compressor according to the proportion at a certain frequency.

[0007] By adopting the above technical solution, the central processing unit first controls the inverter to start the air compressor unit, thereby achieving indoor cooling. During this process, the central processing unit also controls the detection module to detect the indoor temperature, thereby obtaining the indoor temperature and pre-inputting the expected cooling temperature into the central processing unit. After obtaining the expected cooling temperature and the indoor temperature, the processor calculates the temperature difference between the indoor temperature and the expected cooling temperature, i.e., the cooling temperature difference. Then, based on the cooling temperature difference and the preset compressor operating ratio table, the processor controls the overall operating frequency of the air compressor unit at a certain frequency. This facilitates the simultaneous reduction of the air compressor operating frequency while lowering the indoor temperature, thereby improving the energy-saving effect of the air compressor unit.

[0008] In one specific implementation, the detection module includes a pressure detector connected to the gas output port of the air compressor unit, the pressure detector being used to detect the pressure of the saturated gas; the pressure detector is communicatively connected to the central processing unit.

[0009] By adopting the above technical solution, the air pressure at the gas outlet of the air compressor unit can be easily detected by the air pressure detector, and the detected air pressure data can be transmitted to the central processing unit. The central processing unit can then compare the detected air pressure data with the preset air pressure threshold, thereby making it easy to determine in a timely manner whether the air pressure at the gas outlet of the air compressor unit meets the preset air pressure requirement, and thus indirectly determine the compression effect of the compressor.

[0010] In one specific implementation, the detection module includes a flow rate sensor connected to the gas output port of the air compressor unit, the flow rate sensor being used to detect the flow rate of the saturated gas; the flow rate sensor is communicatively connected to the central processing unit.

[0011] By adopting the above technical solution, the flow rate sensor facilitates the detection of high-pressure gas flow rate at the gas outlet of the air compressor unit. The detected gas flow rate data can be transmitted to the central processing unit, which then compares the detected gas flow rate data with a preset gas flow rate threshold. This allows for timely determination of whether the gas flow rate at the air compressor unit's gas outlet meets the preset gas flow rate requirement. If the gas flow rate does not meet the requirement, an alarm message can be promptly issued to relevant personnel, enabling them to handle the abnormal flow rate situation in a timely manner. This improves the safety of the entire air compressor unit's energy-saving control system.

[0012] In one specific implementation scheme, the central processing unit is connected to an abnormality alarm module, which is used to send alarm signals.

[0013] By adopting the above technical solution, if the central processing unit determines that the air pressure at the gas outlet of the air compressor unit has not reached the preset air pressure requirement and / or the gas flow rate at the gas outlet of the air compressor unit has not reached the preset gas flow rate requirement, the central processing unit can promptly send alarm information to the corresponding personnel through the abnormality alarm module, thereby facilitating the timely handling of abnormal situations by the corresponding personnel.

[0014] In one specific implementation, the detection module includes a human body temperature sensor for detecting the body temperature of people in the room; the human body temperature sensor is communicatively connected to a central processing unit.

[0015] By adopting the above technical solution, the human body temperature sensor can easily detect the temperature of people in the room, thereby detecting the body temperature data of the people in the room. Then, the body temperature data of the people in the room is sent to the central processing unit. The central processing unit determines whether the body temperature data of the people in the room has a downward trend. If a downward trend is detected, it immediately controls the frequency converter to reduce the power frequency of the air compressor to a preset value. In this way, while making the people in the room feel comfortable, it also helps to reduce the energy consumption of the air compressor unit.

[0016] In one specific implementation, the detection module includes an indoor people detector for detecting the number of people indoors; the indoor people detector is communicatively connected to a central processing unit.

[0017] By adopting the above technical solution, the number of people in the room can be easily detected through the indoor occupancy detector. The specific number of people in the room can then be detected and sent to the central processing unit. The central processing unit determines whether the number of people in the room is 0. If it determines that it is 0, it immediately controls the frequency converter to reduce the power frequency of the air compressor to the preset value, thereby reducing the energy consumption of the air compressor unit.

[0018] Secondly, this application provides an energy-saving control method for an air compressor unit, which adopts the following technical solution: An energy-saving control method for an air compressor unit, comprising: Obtain indoor temperature; The system generates a cooling temperature difference between the indoor temperature and the expected cooling temperature. Match the refrigeration temperature difference to the corresponding percentage in the preset compressor operating percentage table; The operating frequency of the air compressor is controlled according to a certain frequency and proportion.

[0019] By adopting the above technical solution, the indoor temperature is first obtained, and then the temperature difference between the indoor temperature and the expected cooling temperature is calculated. Then, the operating frequency of the air compressor is controlled according to the temperature difference and the preset compressor operating ratio table. This makes it easier to reduce the overall operating frequency of the air compressor unit when the temperature difference is small. This also makes it easier to reduce the operating frequency of the air compressor simultaneously when the indoor temperature is lowered, thereby improving the energy-saving effect of the air compressor unit.

[0020] Thirdly, this application provides a computer device that adopts the following technical solution: it includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described above for an energy-saving control method for an air compressor unit.

[0021] By adopting the above technical solution, the central processing unit can first control the inverter to start the air compressor unit, thereby achieving indoor cooling. During this process, the central processing unit also controls the detection module to detect the indoor temperature, thereby obtaining the indoor temperature and pre-inputting the expected cooling temperature into the central processing unit. After obtaining the expected cooling temperature and the indoor temperature, the processor calculates the temperature difference between the indoor temperature and the expected cooling temperature, i.e., the cooling temperature difference. Then, based on the cooling temperature difference and the preset compressor operating ratio table, the processor controls the overall operating frequency of the air compressor unit at a certain frequency. This facilitates the simultaneous reduction of the air compressor operating frequency during the process of lowering the indoor temperature, thereby improving the energy-saving effect of the air compressor unit.

[0022] Fourthly, this application provides a computer-readable storage medium, which employs the following technical solution: storing a computer program that can be loaded by a processor and executed as described above for an energy-saving control method for an air compressor unit.

[0023] By adopting the above technical solution, the central processing unit can first control the inverter to start the air compressor unit, thereby achieving indoor cooling. During this process, the central processing unit also controls the detection module to detect the indoor temperature, thereby obtaining the indoor temperature and pre-inputting the expected cooling temperature into the central processing unit. After obtaining the expected cooling temperature and the indoor temperature, the processor calculates the temperature difference between the indoor temperature and the expected cooling temperature, i.e., the cooling temperature difference. Then, based on the cooling temperature difference and the preset compressor operating ratio table, the processor controls the overall operating frequency of the air compressor unit at a certain frequency. This facilitates the simultaneous reduction of the air compressor operating frequency during the process of lowering the indoor temperature, thereby improving the energy-saving effect of the air compressor unit.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Facilitates improvement in the energy efficiency of air compressor units; 2. Facilitates timely handling of abnormal situations by relevant personnel; 3. It not only makes people feel comfortable indoors, but also helps to reduce the energy consumption of air compressor units. Attached Figure Description

[0025] Figure 1 This is a structural block diagram of an energy-saving control system for an air compressor unit according to an embodiment of this application.

[0026] Figure 2 This is a flowchart illustrating an energy-saving control method for an air compressor unit according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached diagram: 100, Air compressor unit; 200, Frequency converter; 300, Detection module; 301, Room temperature sensor; 302, Air pressure detector; 303, Flow rate sensor; 304, Human body temperature sensor; 305, Indoor occupancy detector; 400, Central processing unit; 500, Abnormality alarm module; 501, Buzzer; 502, Alarm light; 503, Alarm signal transmitter; 600, Intelligent control terminal; 700, Gas output pipeline. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-2 This application will be described in further detail.

[0029] Example 1 Embodiment 1 of this application discloses an energy-saving control system for an air compressor unit. (Refer to...) Figure 1 The air compressor unit energy-saving control system includes an air compressor unit 100, which includes several air compressors. The air compressors are used to compress refrigerant into saturated gas, thereby facilitating the reduction of indoor temperature by the saturated gas absorbing heat. Several air compressors are electrically connected to a frequency converter 200, which is used to adjust the power frequency of the air compressors. The frequency converter 200 is electrically connected to a central processing unit 400, which is electrically connected to a detection module 300. The air outlets of several air compressors are connected to a gas output pipe 700, and the detection module 300 is electrically connected between the gas output pipe 700 and the central processing unit 400.

[0030] Specifically, the detection module 300 includes a room temperature sensor 301 installed indoors. The room temperature sensor 301 is used to detect the indoor temperature and transmit the detected indoor temperature data to the central processing unit 400.

[0031] It should be noted that the central processing unit 400 is communicatively connected to the preset intelligent control terminal 600, which is used to set the expected cooling temperature. In this embodiment, the intelligent control terminal 600 may be a remote control, a smartphone, a tablet, or a PC.

[0032] In implementation, the room temperature sensor 301 transmits the collected indoor temperature data to the central processing unit 400. The central processing unit 400, under the settings of the intelligent control terminal 600, has a preset expected cooling temperature. The central processing unit 400 acquires the indoor temperature T... m and the expected cooling temperature T p Then, calculate the indoor temperature T. m With the expected cooling temperature T p The temperature difference between them, also known as the cooling temperature difference ΔT, is specifically, ΔT = T m -T p .

[0033] It should be noted that the CPU 400 has a preset compressor workload table, as shown below: The central processing unit 400 calculates the cooling temperature difference ΔT every 5 minutes, then matches the range of the cooling temperature difference ΔT in the compressor working ratio table, thereby determining the proportion of air compressors in the air compressor group 100 that are in working state corresponding to the cooling temperature difference ΔT, and then controls the air compressors in the air compressor group 100 that correspond to the proportion to be in working state.

[0034] For example, assuming that the total number of air compressors in air compressor unit 100 is 5, and the current cooling temperature difference ΔT is calculated to be 12℃, according to the compressor working percentage table, it can be determined that the percentage of air compressors in air compressor unit 100 that are in working state is 100%. Therefore, the number of air compressors in air compressor unit 100 that are in working state needs to be 5 × 100% = 5. Then, the central processing unit 400 controls all 5 air compressors in air compressor unit 100 to be in working state through the frequency converter 200.

[0035] Five minutes later, the cooling temperature difference ΔT is calculated again. Assuming that the cooling temperature difference ΔT calculated after 5 minutes is 8℃, according to the compressor working ratio table, it can be determined that the proportion of air compressors in the air compressor group 100 that are in working state is 80%. Therefore, the number of air compressors in the air compressor group 100 that are in working state is 5 × 80% = 4. Then, the central processing unit 400 controls any 4 air compressors in the air compressor group 100 to be in working state through the frequency converter 200, and the remaining 1 air compressor is shut down.

[0036] Five minutes later, the cooling temperature difference ΔT is calculated again. Assuming that the cooling temperature difference ΔT calculated after another 5 minutes is 3℃, according to the compressor working ratio table, it can be determined that the proportion of air compressors in the air compressor unit 100 that are in working state is 40%. Therefore, the number of air compressors in the air compressor unit 100 that are in working state is 5×40%=2. Then, the central processing unit 400 controls any 2 air compressors in the air compressor unit 100 to be in working state through the frequency converter 200, and the remaining 3 air compressors are shut down.

[0037] Five minutes later, the cooling temperature difference ΔT is calculated again. Assuming that the cooling temperature difference ΔT calculated after another 5 minutes is 0.5℃, according to the compressor working ratio table, it can be determined that the proportion of air compressors in the air compressor group 100 that are in working state is 20%. Therefore, the number of air compressors in the air compressor group 100 that are in working state is 5 × 20% = 1. Then, the central processing unit 400 controls any one air compressor in the air compressor group 100 to be in working state through the frequency converter 200, and the remaining 4 air compressors are shut down.

[0038] In summary, as the cooling temperature difference ΔT gradually decreases, the number of air compressors in operation in the air compressor unit 100 gradually decreases. This facilitates a gradual reduction in the overall operating frequency of the air compressor unit 100 as the cooling temperature difference ΔT gradually decreases, thus preventing the temperature from continuing to drop further after it has already dropped to the expected cooling temperature. It also facilitates energy saving while achieving the goal of lowering the temperature to the expected cooling temperature.

[0039] In one embodiment, the detection module 300 further includes a pressure detector 302 disposed in the gas output pipeline 700. The pressure detector 302 is communicatively connected to the central processing unit 400. The pressure detector 302 is used to detect the pressure of the saturated gas in the gas output pipeline 700 and transmit the detected pressure data to the central processing unit 400. The central processing unit 400 is also electrically connected to an abnormality alarm module 500. In this embodiment, the abnormality alarm module 500 is one or more of a buzzer 501, an alarm light 502, and an alarm signal transmitter 503 that are electrically connected to the central processing unit 400.

[0040] It should be noted that the gas output pipe 700 is connected to the air compressor unit 100 and the indoor fan. If the gas output pipe 700 is blocked between the air compressor unit 100 and the indoor fan, the air pressure will rise sharply. If the blockage persists for a long time, the gas output pipe 700 may burst. If the gas output pipe 700 leaks, the air pressure will drop sharply. If the blockage persists for a long time, the indoor cooling process will be interrupted.

[0041] In practice, the computer is preset with air pressure overload threshold and air pressure underload threshold. After the air pressure detector 302 detects the air pressure data in the gas output pipe 700, it transmits the air pressure data to the central processing unit 400. Then, the central processing unit 400 judges the acquired air pressure data according to the air pressure overload threshold and air pressure underload threshold. If the judgment result is that the air pressure data is greater than the air pressure overload threshold, it means that the gas output pipe 700 is at risk of bursting. The central processing unit 400 immediately controls all air compressors to stop running through the frequency converter 200 and controls the abnormality alarm module 500 to send an alarm signal to relevant personnel.

[0042] In one embodiment, the detection module 300 includes a flow rate sensor 303 connected in the gas output pipe 700. The flow rate sensor 303 is used to measure the gas flow rate of the saturated gas in the gas output pipe 700 and is communicatively connected to the central processing unit 400.

[0043] It should be noted that, to ensure refrigeration efficiency and effect, the air compressor unit needs to compress a certain amount of saturated gas per 100 unit time. To visually reflect the amount of saturated gas compressed per 100 unit time, the flow rate of the saturated gas can be detected by the flow rate sensor 303. If the amount of saturated gas compressed per 100 unit time does not meet expectations, one important reason is insufficient refrigerant in the compressor.

[0044] In implementation, the flow rate sensor 303 transmits the detected gas flow rate data of the saturated gas to the central processing unit 400 in real time. The central processing unit 400 determines whether the gas flow rate is lower than the preset gas flow rate threshold. If so, the central processing unit 400 controls the abnormality alarm module 500 to send an alarm message to relevant personnel, so that relevant personnel can notice the phenomenon in time and check the amount of refrigerant in the compressor. If it is found that the amount of refrigerant is indeed insufficient, it is immediately replenished. This helps to improve the efficiency and effect of refrigeration.

[0045] In one embodiment, the detection module 300 includes a human body temperature sensor 304 disposed indoors, which is used to detect the body temperature of people indoors; the human body temperature sensor 304 is communicatively connected to the central processing unit 400.

[0046] It should be noted that in the late afternoon, people indoors have been in a low-temperature environment for a long time, so their body temperature will gradually decrease. However, the indoor temperature will remain at the preset cooling temperature. Unless manually adjusted, the indoor temperature will remain at the preset cooling temperature, which will cause people indoors to experience a decrease in body temperature. This will not only make people indoors feel uncomfortable, but also lead to a waste of electricity.

[0047] In practice, the active temperature change time and the expected temperature rise are set in the processor through the intelligent control terminal 600. When the central processing unit 400 determines that the active temperature change time has been reached, it immediately controls the frequency converter 200 to reduce the overall power frequency of the air compressor unit 100, so that the indoor temperature gradually rises until the room temperature sensor 301 detects that the indoor temperature has reached the expected temperature rise.

[0048] In one embodiment, the detection module 300 includes an indoor people detector 305 disposed indoors, which is used to detect the number of people indoors; the indoor people detector 305 is communicatively connected to the central processing unit 400.

[0049] It should be noted that in existing technologies, the compressor unit operates at a preset operating frequency regardless of whether anyone is indoors, which results in a significant waste of electricity when no one is indoors.

[0050] In implementation, the indoor occupancy detector 305 detects the number of people indoors at predetermined time intervals and transmits the data to the central processing unit 400. The central processing unit 400 judges the number of people indoors. If it determines that the number of people indoors is 0, it continues to wait for a predetermined time interval, and then continues to acquire the number of people indoors from the indoor occupancy detector 305 and judges the data. If it still determines that the number of people indoors is 0, it reduces the overall operating frequency of the compressor unit through the frequency converter 200. The methods for reducing the overall operating frequency of the compressor unit include, but are not limited to: first, synchronously reducing the operating frequency of each compressor in the compressor unit; second, shutting down several compressors in the compressor unit.

[0051] Example 2 Embodiment 2 of this application discloses an energy-saving control method for an air compressor unit, based on the aforementioned energy-saving control system for an air compressor unit. (Refer to...) Figure 2 Energy-saving control methods for air compressor units include: S100: Obtain indoor temperature.

[0052] In practice, the room temperature sensor 301 is pre-installed at a preset location in the room. In order to ensure the accuracy of the measured indoor temperature data, multiple room temperature sensors 301 that are connected to the central processing unit 400 can be evenly set up in the room so that the central processing unit 400 can synchronously receive temperature data from different locations in the room and perform corresponding mathematical processing on the temperature data to obtain an overall temperature that can objectively reflect the current indoor temperature.

[0053] S200 generates a cooling temperature difference between the indoor temperature and the expected cooling temperature.

[0054] The user manually sets the expected cooling temperature for the central processing unit (CPU) 400 via the intelligent control terminal 600, thus pre-storing the expected cooling temperature in the CPU 400. The CPU 400 controls the room temperature sensor 301 to acquire indoor temperature data at a certain frequency, and then performs corresponding mathematical processing on the indoor temperature data to obtain the indoor temperature; furthermore, the CPU 400, upon acquiring the indoor temperature T... m and the expected cooling temperature T p Then, calculate the indoor temperature T. m With the expected cooling temperature T p The temperature difference between them, also known as the cooling temperature difference ΔT, is specifically, ΔT = T m -T p .

[0055] S300, matching the proportion of the cooling temperature difference in the preset compressor operating proportion table.

[0056] In implementation, the central processing unit 400 has a preset compressor operating percentage table, as shown below: The central processing unit 400 calculates the cooling temperature difference ΔT every 5 minutes, and then matches the range of the cooling temperature difference ΔT in the compressor working percentage table to determine the percentage of air compressors in the air compressor unit 100 that are in operation corresponding to the cooling temperature difference ΔT.

[0057] S400 controls the operating frequency of the air compressor according to a certain frequency and proportion.

[0058] In implementation, assuming that the total number of air compressors in air compressor unit 100 is 5, and the current cooling temperature difference ΔT is calculated to be 12℃, according to the compressor working percentage table, it can be determined that the percentage of air compressors in air compressor unit 100 that are in working state is 100%. Therefore, the number of air compressors in air compressor unit 100 that are in working state needs to be 5 × 100% = 5. Then, the central processing unit 400 controls all 5 air compressors in air compressor unit 100 to be in working state through the frequency converter 200.

[0059] Five minutes later, the cooling temperature difference ΔT is calculated again. Assuming that the cooling temperature difference ΔT calculated after 5 minutes is 8℃, according to the compressor working ratio table, it can be determined that the proportion of air compressors in the air compressor group 100 that are in working state is 80%. Therefore, the number of air compressors in the air compressor group 100 that are in working state is 5 × 80% = 4. Then, the central processing unit 400 controls any 4 air compressors in the air compressor group 100 to be in working state through the frequency converter 200, and the remaining 1 air compressor is shut down.

[0060] Five minutes later, the cooling temperature difference ΔT is calculated again. Assuming that the cooling temperature difference ΔT calculated after another 5 minutes is 3℃, according to the compressor working ratio table, it can be determined that the proportion of air compressors in the air compressor unit 100 that are in working state is 40%. Therefore, the number of air compressors in the air compressor unit 100 that are in working state is 5×40%=2. Then, the central processing unit 400 controls any 2 air compressors in the air compressor unit 100 to be in working state through the frequency converter 200, and the remaining 3 air compressors are shut down.

[0061] Five minutes later, the cooling temperature difference ΔT is calculated again. Assuming that the cooling temperature difference ΔT calculated after another 5 minutes is 0.5℃, according to the compressor working ratio table, it can be determined that the proportion of air compressors in the air compressor group 100 that are in working state is 20%. Therefore, the number of air compressors in the air compressor group 100 that are in working state is 5 × 20% = 1. Then, the central processing unit 400 controls any one air compressor in the air compressor group 100 to be in working state through the frequency converter 200, and the remaining 4 air compressors are shut down.

[0062] In summary, as the cooling temperature difference ΔT gradually decreases, the number of air compressors in operation in the air compressor unit 100 gradually decreases. This facilitates a gradual reduction in the overall operating frequency of the air compressor unit 100 as the cooling temperature difference ΔT gradually decreases, thus preventing the temperature from continuing to drop further after it has already dropped to the expected cooling temperature. It also facilitates energy saving while achieving the goal of lowering the temperature to the expected cooling temperature.

[0063] Figure 2 This is a flowchart illustrating an energy-saving control method for an air compressor unit in one embodiment. It should be understood that, although... Figure 2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows; unless explicitly stated otherwise, there is no strict order requirement for the execution of these steps, and they can be executed in other orders; and Figure 2 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0064] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiment.

[0065] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0066] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0067] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this disclosure can include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this disclosure may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this disclosure may be general-purpose processors, central processing units 400, graphics processors, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0069] The above embodiments merely illustrate several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this patent disclosure. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this disclosure should be determined by the appended claims.

Claims

1. An energy-saving control system for an air compressor unit, characterized in that: include: An air compressor unit (100) is used to compress refrigerant to generate saturated gas; A frequency converter (200) is used to control the power frequency of each air compressor in the air compressor unit (100); The detection module (300) is used to detect the indoor temperature; The central processing unit (400) is used to acquire the indoor temperature, process the indoor temperature and the expected cooling temperature to generate a cooling temperature difference, match the cooling temperature difference to the corresponding proportion in the preset compressor working proportion table, and control the working frequency of the air compressor according to the proportion at a certain frequency. The detection module (300) includes a human body temperature sensor (304), which is used to detect the body temperature of people in the room; the human body temperature sensor (304) is communicatively connected to the central processing unit (400); The central processing unit (400) is connected to a preset intelligent control terminal (600) for communication. The intelligent control terminal (600) is used to set the expected cooling temperature. The active temperature change time and the expected temperature rise are set in the processor through the intelligent control terminal (600). When the central processing unit (400) determines that the active temperature change time has been reached, it immediately controls the frequency converter (200) to reduce the overall power frequency of the air compressor unit (100), so that the indoor temperature gradually rises until the room temperature sensor (301) detects that the indoor temperature has reached the expected temperature rise. The detection module (300) includes an indoor people detector (305), which is used to detect the number of people in the room; the indoor people detector (305) is communicatively connected to the central processing unit (400); The indoor occupancy detector (305) detects the number of people in the room at predetermined time intervals and transmits the data to the central processing unit (400). The central processing unit (400) judges the number of people in the room. If it judges that the number of people in the room is 0, it continues to wait for a predetermined time interval, and then continues to acquire the number of people in the room data transmitted by the indoor occupancy detector (305) and judges the number of people in the room data. If it still judges that the number of people in the room is 0, it reduces the overall operating frequency of the compressor unit through the frequency converter (200). The methods for reducing the overall operating frequency of the compressor unit include, but are not limited to: first, synchronously reducing the operating frequency of each compressor in the compressor unit; second, shutting down several compressors in the compressor unit.

2. The energy-saving control system for an air compressor unit according to claim 1, characterized in that: The detection module (300) includes a pressure detector (302) connected to the gas output port of the air compressor unit (100), which is used to detect the pressure of saturated gas; the pressure detector (302) is communicatively connected to the central processing unit (400).

3. The energy-saving control system for an air compressor unit according to claim 1, characterized in that: The detection module (300) includes a flow rate sensor (303) connected to the gas output port of the air compressor unit (100), the flow rate sensor (303) is used to detect the flow rate of saturated gas; the flow rate sensor (303) is communicatively connected to the central processing unit (400).

4. The energy-saving control system for an air compressor unit according to any one of claims 2 or 3, characterized in that: The central processing unit (400) is connected to an abnormality alarm module (500), which is used to send alarm signals.

5. An energy-saving control method for an air compressor unit, characterized in that: The method is based on an energy-saving control system for an air compressor unit as described in any one of claims 1-4, and the method includes: Obtain indoor temperature; The system generates a cooling temperature difference between the indoor temperature and the expected cooling temperature. Match the refrigeration temperature difference to the corresponding percentage in the preset compressor operating percentage table; The operating frequency of the air compressor is controlled according to a certain frequency and proportion.

6. A computer device, characterized in that, The computer device includes a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, it causes the processor to perform an energy-saving control method for an air compressor unit as described in claim 5.

7. A computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform an energy-saving control method for an air compressor unit as described in claim 5.

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