Communication-free air conditioning system, control method and device thereof, medium and program product

Abstract

The application discloses a non-communication air conditioning system and a control method, device, storage medium and computer program product thereof, and the method comprises the following steps: determining the current optimal energy efficiency frequency and the current optimal capacity step-up frequency step of the compressor according to the outdoor environment temperature of the outdoor unit; determining the predicted set temperature in the case that the non-communication air conditioning system is started and runs to the shutdown of the indoor unit; determining the absolute value of the difference between the indoor environment temperature of the indoor unit and the predicted set temperature as the indoor temperature difference of the indoor unit; and controlling the compressor to run in the energy-saving mode according to the current optimal energy efficiency frequency of the compressor and / or controlling the compressor to run in the step-up frequency mode according to the current optimal capacity step-up frequency step of the compressor according to the indoor temperature difference of the indoor unit. According to the scheme, the running state of the compressor is controlled in combination with the outdoor environment temperature and the indoor environment temperature difference in the non-communication mode, so that the running state of the outdoor unit meets the indoor load demand, and the user experience is improved. The non-communication air conditioning system belongs to the energy-saving type refrigeration and air conditioning equipment.

Description

Technical Field

[0001] This invention belongs to the technical field of non-communication air conditioning systems, specifically relating to a control method, device, system, storage medium, and computer program product for a non-communication air conditioning system. This non-communication air conditioning system is an energy-saving refrigeration and air conditioning device. Background Technology

[0002] In non-communication air conditioning systems (such as non-communication air conditioning units), the indoor unit, outdoor unit, and thermostat lack communication chips, meaning there is no communication protocol between them. Because these components cannot exchange complex information, the actual operating status of the outdoor unit may differ from the actual indoor load demand, impacting user experience. This non-communication air conditioning system is classified as an energy-saving refrigeration and air conditioning unit.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to provide a control method, device, system, storage medium, and computer program product for a non-communication air conditioning system. This addresses the problem that in non-communication air conditioning systems (such as those without communication chips), the indoor unit, outdoor unit, and thermostat lack communication chips, hindering complex information transmission between them. This leads to a discrepancy between the actual operating status of the outdoor unit and the actual indoor load demand, negatively impacting user experience. The invention achieves this by controlling the compressor's operation based on the outdoor and indoor temperature differences in the absence of communication, ensuring the outdoor unit's operation matches the indoor load demand and improving user experience. This non-communication air conditioning system is an energy-saving refrigeration and air conditioning device.

[0005] This invention provides a control method for a non-communication air conditioning system, the non-communication air conditioning system having an outdoor unit and an indoor unit, the outdoor unit having a compressor; the control method for the non-communication air conditioning system includes: acquiring the outdoor ambient temperature of the outdoor unit, acquiring the indoor ambient temperature of the indoor unit; determining the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step size of the compressor based on the outdoor ambient temperature of the outdoor unit; determining a predicted set temperature after the non-communication air conditioning system has been turned on and is running until the indoor unit is turned off; and determining the absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature as the indoor temperature difference of the indoor unit.

[0006] Based on the indoor temperature difference of the indoor unit, control the compressor to operate at the compressor's current optimal energy efficiency frequency for energy saving, and / or control the compressor to operate at the compressor's current optimal capacity frequency increase step size.

[0007] In some embodiments, the method further includes: first, dividing the target outdoor ambient temperature range into two or more outdoor temperature intervals based on the target outdoor ambient temperature range in which the non-communication air conditioning system can operate; for each of the two or more outdoor temperature intervals, determining the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor corresponding to each outdoor temperature interval; thereby obtaining the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor under different outdoor temperature intervals.

[0008] In some implementations, the current optimal energy efficiency frequency of the compressor and the current optimal capacity ramp-up step size of the compressor are determined based on the outdoor ambient temperature of the outdoor unit. This includes: determining the optimal energy efficiency frequency point of the compressor under different outdoor temperature ranges and the optimal capacity ramp-up frequency point of the compressor based on pre-determined values; determining the current outdoor temperature range to which the outdoor ambient temperature of the outdoor unit belongs within the different outdoor temperature ranges; using the optimal energy efficiency frequency point of the compressor under the current outdoor temperature range as the current optimal energy efficiency frequency of the compressor; and using the optimal capacity ramp-up frequency point of the compressor under the current outdoor temperature range as the current optimal capacity ramp-up step size of the compressor.

[0009] Alternatively, based on the correspondence between the set outdoor ambient temperature, the set optimal energy efficiency frequency, and the set optimal capacity frequency increase step size, the set optimal energy efficiency frequency that is the same as the outdoor ambient temperature of the outdoor unit in the correspondence is taken as the current optimal energy efficiency frequency of the compressor, and the set optimal capacity frequency increase step size that is the same as the outdoor ambient temperature of the outdoor unit in the correspondence is taken as the current optimal capacity frequency increase step size of the compressor.

[0010] In some implementations, when the non-communication air conditioning system is turned on and the indoor unit stops, determining the predicted set temperature includes: after the non-communication air conditioning system is turned on, the compressor is operated at the compressor's current optimal energy efficiency frequency by default; until the indoor unit stops when the indoor ambient temperature of the indoor unit reaches the set temperature point, the indoor unit controls the compressor to stop; and the indoor ambient temperature of the indoor unit when the indoor unit stops is used as the predicted set temperature.

[0011] In some implementations, based on the indoor temperature difference of the indoor unit, controlling the compressor to operate at its current optimal energy efficiency frequency for energy saving, and / or controlling the compressor to operate at its current optimal capacity frequency increase step size, includes: determining whether the indoor temperature difference of the indoor unit is greater than a first preset temperature threshold and less than or equal to a second preset temperature threshold; if it is determined that the indoor temperature difference of the indoor unit is greater than the first preset temperature threshold and less than or equal to the second preset temperature threshold, then controlling the compressor to operate at its current optimal energy efficiency frequency for energy saving; if it is determined that the indoor temperature difference of the indoor unit is greater than the second preset temperature threshold, then controlling the compressor to operate at its current optimal capacity frequency increase step size; if it is determined that the indoor temperature difference of the indoor unit is less than or equal to the first preset temperature threshold, then controlling the compressor to maintain its current state.

[0012] In some embodiments, a first marking terminal and a second marking terminal are provided; both the first marking terminal and the second marking terminal of the indoor unit are used to control the operating status of the compressor. The first marking terminal of the indoor unit is a terminal marked with Y or Y1, that is, the first marking terminal of the indoor unit is a terminal marked with Y / Y1, and the second marking terminal of the indoor unit is a terminal marked with Y2. The situation where the non-communication air conditioning system runs from startup to shutdown includes: simultaneously de-energizing both the first marking terminal and the second marking terminal of the indoor unit to stop the compressor.

[0013] And / or, controlling the compressor to operate at the compressor's current optimal energy efficiency frequency for energy saving includes: energizing the first indicator terminal of the indoor unit, and the first indicator terminal of the indoor unit sending a first set control signal to the outdoor unit for controlling the compressor, so that the compressor operates at the compressor's current optimal energy efficiency frequency for energy saving;

[0014] And / or, controlling the compressor to operate at a frequency increase step size based on the compressor's current optimal capacity includes: energizing the second indicator terminal of the indoor unit and sending a second set control signal from the second indicator terminal of the indoor unit to the outdoor unit for controlling the compressor, so that the compressor operates at a frequency increase step size based on the compressor's current optimal energy efficiency frequency.

[0015] In conjunction with the above method, another aspect of the present invention provides a control device for a communication-free air conditioning system, comprising: an acquisition unit configured to acquire the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit; a control unit configured to determine the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step size of the compressor based on the outdoor ambient temperature of the outdoor unit; the control unit is further configured to determine a predicted set temperature when the communication-free air conditioning system has been running from startup to shutdown of the indoor unit; the control unit is further configured to determine the absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature as the indoor temperature difference of the indoor unit; the control unit is further configured to control the compressor to operate at the current optimal energy efficiency frequency for energy saving and / or control the compressor to operate at the current optimal capacity frequency increase step size of the compressor based on the indoor temperature difference of the indoor unit.

[0016] In conjunction with the above-mentioned device, the present invention further provides a communication-free air conditioning system, comprising: the control device for the communication-free air conditioning system described above.

[0017] In conjunction with the above method, the present invention further provides a storage medium comprising a stored program, wherein, when the program is executed, the device containing the storage medium is controlled to perform the steps of the control method for the communication-free air conditioning system described above.

[0018] In conjunction with the above method, the present invention further provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for a communication-free air conditioning system described above.

[0019] The present invention addresses a non-communication air conditioning system, which includes an outdoor unit and an indoor unit. The outdoor unit has a compressor, and the system also includes a thermostat. When the non-communication air conditioning system is powered on, the system acquires the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit. On the outdoor unit side, based on the outdoor ambient temperature, the system determines the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step size. On the outdoor unit side, the indoor unit side, and the thermostat side, after the non-communication air conditioning system has been running from startup to shutdown, a predicted set temperature is determined. On the indoor unit side, the absolute value of the difference between the indoor ambient temperature and the predicted set temperature is determined as the indoor temperature difference. On the indoor unit side, based on the indoor temperature difference, the system controls the compressor to operate at its current optimal energy efficiency frequency for energy saving, and / or controls the compressor to operate at its current optimal capacity frequency increase step size. Therefore, by controlling the compressor's operation based on the outdoor and indoor temperature differences even without communication, the outdoor unit's operation matches the indoor load requirements, improving the user experience. This communication-free air conditioning system is an energy-saving refrigeration and air conditioning device.

[0020] Specifically, in the solution of this invention, for a non-communication air conditioning system, the non-communication air conditioning system has an outdoor unit, an indoor unit, and a thermostat, and the outdoor unit has a compressor (such as compressor 1); to address the problem of controlling the compressor frequency in a non-communication air conditioning system to adapt to indoor load demands, a first indicator terminal (such as a terminal marked Y / Y1) and a second indicator terminal (such as a terminal marked Y2) are provided for transmitting signals to control the compressor's operating status during the operation of the non-communication air conditioning system. When both the Y / Y1 and Y2 terminals are simultaneously de-energized, the compressor stops; when either the Y / Y1 or Y2 terminal is energized, the compressor starts; and when the Y / Y1 terminal is energized, it indicates that the compressor is operating at its optimal frequency point f. set When the Y2 terminal is energized, it indicates that the compressor is operating at its optimal frequency. set + Frequency upsampling point δf m Operation; Divide the outdoor temperature range of the non-communication air conditioning system into several outdoor temperature intervals (e.g., divide into M intervals in cooling mode or N intervals in heating mode with equal steps, or divide into M intervals in cooling mode or N intervals in heating mode with unequal steps based on the capacity differences of the non-communication air conditioning system). Set two frequency points for the compressor for each outdoor temperature interval (e.g., the compressor's optimal frequency point f). set and the compressor's up-frequency point δf mThis means setting two operating frequencies for the compressor (i.e., the compressor operates at its optimal frequency point f). set The compressor is running at its optimal frequency point f. set + Frequency upsampling point δf m (Running); after the air conditioning system receives the start-up signal sent by the user through the thermostat and starts up, it defaults to the compressor's optimal frequency point f under the current outdoor temperature range. set The thermostat is running and monitoring the indoor ambient temperature T. in After reaching the actual set temperature when the user sends the start-up signal via the thermostat, the thermostat simultaneously de-energizes the Y / Y1 and Y2 terminals on the indoor unit (the Y / Y1 and Y2 terminals are used to control the compressor's start-up and shutdown). This simultaneous de-energization of the Y / Y1 and Y2 terminals on the indoor unit controls the outdoor unit to shut down (primarily controlling the outdoor unit's compressor). The indoor unit's main board uses the indoor ambient temperature at the time the indoor unit shuts down as the predicted user-set temperature T. set The indoor unit's mainboard monitors and calculates the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = T. in -T set When the indoor temperature difference ΔT is greater than the preset shutdown temperature threshold δT 停机 And less than or equal to the preset frequency rise temperature threshold δT 升频 When the first marked terminal of the indoor unit is energized, and the outdoor unit sends a first set control signal to control the compressor, such as energizing the Y / Y1 marked terminal of the indoor unit, and the outdoor unit sends a first set control signal to control the compressor, so that the compressor operates at the optimal frequency point f set Run, set time, then return to re-monitor and calculate the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = T. in -T set When the indoor temperature difference ΔT is greater than the preset frequency-up temperature threshold δT 升频The indoor unit energizes the second marker terminal and sends a second set control signal to the outdoor unit to control the compressor. For example, it energizes the Y2 marker terminal of the indoor unit and sends a second set control signal to the outdoor unit to control the compressor, so that the compressor operates at its optimal frequency point f. set + Frequency upsampling point δf m Run, set time, then return to re-monitor and calculate the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = T. in -T set When the indoor temperature difference ΔT is less than or equal to the preset shutdown temperature threshold δT 停机 The indoor unit will simultaneously disconnect the power to the terminals marked Y / Y1 and Y2, and after the set time, return to re-monitor and calculate the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = |T in -T set Therefore, by controlling the compressor's operation based on the outdoor and indoor temperature differences when communication is unavailable (e.g., controlling the compressor to stop, controlling it to start and operate at the optimal frequency point corresponding to the current outdoor conditions for energy saving, or operating at an appropriately increased frequency point corresponding to the current outdoor conditions), the outdoor unit's operating status is made to meet the indoor load requirements, saving energy, improving indoor comfort, and enhancing the user experience. This communication-free air conditioning system is an energy-saving refrigeration and air conditioning equipment.

[0021] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0022] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating an embodiment of the control method for a non-communication air conditioning system of the present invention;

[0024] Figure 2 This is a flowchart illustrating an embodiment of the optimal energy efficiency frequency point and the optimal capacity boost frequency point of the compressor under different outdoor temperature ranges in the method of the present invention.

[0025] Figure 3This is a flowchart illustrating an embodiment of the first process in the method of the present invention for determining the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency ramp-up step size of the compressor;

[0026] Figure 4 This is a schematic flowchart illustrating an embodiment of the method of the present invention for determining a predicted set temperature;

[0027] Figure 5 This is a schematic flowchart of an embodiment of the method of the present invention, which controls the compressor to operate in energy-saving mode at the compressor's current optimal energy efficiency frequency and / or to operate at the compressor's current optimal capacity frequency increment step.

[0028] Figure 6 This is a schematic diagram of the structure of an embodiment of the control device for the non-communication air conditioning system of the present invention;

[0029] Figure 7 A schematic diagram of an embodiment of an air conditioning system without communication;

[0030] Figure 8 A flowchart illustrating an embodiment of a method for efficient operation control of a non-communication air conditioning system in cooling mode;

[0031] Figure 9 A flowchart illustrating an embodiment of an efficient operation control method for a non-communication air conditioning system in heating mode;

[0032] Figure 10 This is a wiring diagram for an air conditioning system without communication capabilities.

[0033] Referring to the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0034] 1-Compressor; 2-Oil separator; 3-Four-way valve; 4-Indoor heat exchanger; 41-Indoor fan; 51-Refrigeration expansion valve; 52-Heating expansion valve; 6-Outdoor heat exchanger; 61-Outdoor fan; 7-Gas-liquid separator; 81-High pressure sensor; 82-Low pressure sensor; 83-Return air temperature sensor; 84-Outdoor ambient temperature sensor; 102-Acquisition unit; 104-Control unit. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0036] Considering that air conditioning systems without communication technology (such as those without communication capabilities) lack communication chips in their indoor and outdoor units and thermostats, complex information transmission between these three components is impossible. This can lead to a discrepancy between the actual operating status of the outdoor unit and the actual load demand of the indoor unit, impacting user experience. Specifically, air conditioning systems without communication technology lack communication chips and protocols such as RS485 and Modbus, preventing the transmission of complex information. They can only achieve simple control information transmission, such as 0 indicating off and 1 indicating on, through power on / off switching. This allows for basic control information transmission, but further adjustments after power is on are not possible, resulting in extremely limited information capacity.

[0037] In a non-communication air conditioning system, starting, turning on, and switching modes only require the thermostat to send 24V switching signals to the indoor and outdoor units respectively (i.e., energizing or de-energizing specific terminals; the indoor and outdoor units then control their operation according to preset logic based on the energization status of different terminals; for example, energizing the Y terminal indicates starting the compressor, and energizing the G terminal indicates starting the indoor fan). The thermostat can individually control different components of the air conditioner by switching the 24V power to different terminals. This characteristic gives this type of non-communication air conditioning system a high degree of flexibility; indoor and outdoor units of different models and even from different manufacturers can be freely combined, thus leading to its widespread application. However, because the indoor unit, outdoor unit, and thermostat are not equipped with communication chips, they cannot exchange complex information. The outdoor unit cannot obtain indoor parameters and cannot control components such as the compressor in a timely manner based on the real-time indoor status, resulting in the actual operating status of the outdoor unit not meeting the indoor load requirements.

[0038] In related solutions, the control method for the compressor in the outdoor unit of a non-communication air conditioning system often involves determining the set value or range of the compressor's operating frequency based on the outdoor ambient temperature. This control method may lead to some disadvantages, increasing energy consumption and affecting user comfort. For example, taking cooling mode as an example: when the outdoor ambient temperature is high, the compressor operates at a high frequency, while the indoor heat load may be low, and high-frequency output is not required. In this case, the non-communication air conditioning system remains in a low-energy-efficiency state for a long time, resulting in a significant increase in operating energy consumption. Conversely, when the outdoor ambient temperature is low, the compressor is restricted to a low frequency. However, if the indoor heat load is high, the compressor's low-frequency operation cannot provide the required cooling capacity, severely affecting thermal comfort.

[0039] One proposed solution provides an air conditioner and its control method. The main approach involves obtaining the user-set temperature through the air conditioner's on / off behavior, and then adjusting the compressor's operating frequency based on the temperature difference between the indoor unit's return air temperature and the user-set temperature. However, this solution adjusts the compressor frequency by setting multiple frequency ramp-up / down steps, frequently adjusting the frequency according to the indoor temperature difference, without addressing the optimal energy-efficient operating point. Furthermore, this method requires continuous acquisition of the indoor temperature difference, which is difficult to implement for air conditioning systems without communication capabilities. It necessitates adding multiple 24V terminals to the controller (such as the indoor unit's main board) for compressor control, resulting in high implementation costs.

[0040] Therefore, to address the limitations of non-communication air conditioning units in practical applications and to resolve shortcomings in existing solutions, this invention proposes a control method for a non-communication air conditioning system. Specifically, this method involves defining an outer-loop outdoor temperature range and pre-setting the compressor's highest energy efficiency frequency point. It monitors the shutdown signals sent by the indoor unit to the compressor. When the indoor unit issues a shutdown command due to the indoor ambient temperature reaching the target point, it monitors and records the indoor return air temperature at this time as a predicted user-set temperature for subsequent control. Based on the indoor temperature difference, it sends a Y / Y1 or Y2 switch signal to the outdoor unit. For example, it energizes the Y / Y1 terminal of the indoor unit and sends a first set control signal to the outdoor unit to control the compressor, or energizes the Y2 terminal of the indoor unit and sends a second set control signal to the outdoor unit to control the compressor. When the indoor temperature difference is low, it controls the compressor at a low frequency (f). set_Cm When the indoor temperature difference is high, the compressor frequency should be appropriately increased. set_Cm +δf m The outdoor unit operates in a manner that matches the indoor load requirements, saving energy, improving indoor comfort, and enhancing the user experience.

[0041] According to embodiments of the present invention, a control method for a communication-free air conditioning system is provided, such as... Figure 1The diagram shows a flowchart of an embodiment of the method of the present invention. The non-communication air conditioning system has an outdoor unit and an indoor unit. The outdoor unit has a compressor, and the non-communication air conditioning system also has a thermostat. A first-marked terminal (e.g., a terminal marked Y / Y1) and a second-marked terminal (e.g., a terminal marked Y2) are used to control the operating state of the outdoor unit, specifically the operating state of the compressor. Simultaneous de-energization of both the Y / Y1 and Y2 terminals indicates that the compressor is stopped. Energizing the Y / Y1 terminal of the indoor unit and having the Y / Y1 terminal of the indoor unit connected to the outdoor unit, the outdoor unit sends a first set control signal to control the compressor, indicating that the compressor operates at its optimal energy efficiency frequency point. Energizing the Y2 terminal of the indoor unit and having the Y2 terminal of the indoor unit send a second set control signal to the outdoor unit, indicating that the compressor operates at its optimal energy efficiency frequency point, increasing its frequency after reaching the increased frequency point. The compressor operates as follows... Figure 7 Compressor 1 is shown.

[0042] Figure 7 This is a schematic diagram of an embodiment of an air conditioning system without communication capabilities. Figure 7The air conditioning system without communication shown includes: compressor 1, indoor and outdoor heat exchangers (such as indoor heat exchanger 4 and outdoor heat exchanger 6), indoor and outdoor fans (such as indoor fan 41 and outdoor fan 61), electronic expansion valves (such as cooling expansion valve 51 and heating expansion valve 52), oil separator 2, gas-liquid separator 7, four-way valve 3, high and low pressure sensors (such as high pressure sensor 81 and low pressure sensor 82), and temperature sensors (such as return air temperature sensor 83 and outdoor ambient temperature sensor 84). Indoor fan 41 is located on the air outlet side of indoor heat exchanger 4, outdoor fan 61 is located on the air outlet side of outdoor heat exchanger 6, high pressure sensor 81 is located on the pipe where the compressor 1 is located at the exhaust port, low pressure sensor 82 is located on the pipe where the compressor 1 is located at the intake port, return air temperature sensor 83 is located at the return air inlet of the indoor unit (specifically on the return air side of indoor heat exchanger 4), and outdoor ambient temperature sensor 84 is located on the outdoor side of the outdoor unit (specifically on the air inlet side of outdoor heat exchanger 6). The compressor 1's discharge port is connected to the first port of the oil separator 2; the second port of the oil separator 2 is connected to the compressor 1's oil return port; and the third port of the oil separator 2 is connected to the fourth port of the four-way valve 3. The first port of the four-way valve 3, after passing through the outdoor heat exchanger 6, the refrigeration expansion valve 52, the heating expansion valve 51, and the indoor heat exchanger 4, is connected to the third port of the four-way valve 3. The second port of the four-way valve 3, after passing through the gas-liquid separator 7, returns to the compressor 1's suction port. When the air conditioner is cooling, the unit controls the opening of the refrigeration expansion valve 51 to throttle the refrigerant at the indoor unit; when the air conditioner is heating, the unit controls the opening of the heating expansion valve 52 to throttle the refrigerant at the outdoor unit (correspondingly, the indoor unit heats). The advantage of using two valves is that the throttled refrigerant is at a low temperature. If only one electronic expansion valve is used, the low-temperature refrigerant will have already risen in temperature before flowing into the indoor unit, resulting in a reduction in cooling effect.

[0043] In the solution of the present invention, such as Figure 1 As shown, the control method of the non-communication air conditioning system includes steps S110 to S150.

[0044] In step S110, when the non-communication air conditioning system is powered on, the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit are acquired; wherein, the outdoor ambient temperature of the outdoor unit is, for example, the temperature detected by the outdoor ambient temperature sensor 84; the indoor ambient temperature of the indoor unit is, for example, the temperature detected by the return air temperature sensor 83, specifically, the indoor return air temperature detected by the return air temperature sensor 83 is used as the indoor ambient temperature T. in .

[0045] In step S120, on the outdoor unit side, based on the outdoor ambient temperature of the outdoor unit, the current optimal energy efficiency frequency of the compressor is determined, and the current optimal capacity frequency increase step size of the compressor is also determined; wherein, the current optimal energy efficiency frequency of the compressor is, for example, the compressor's highest energy efficiency frequency point f. set The current optimal capacity ramp-up step size of the compressor, such as ramp-up step size δf. m .

[0046] In step S130, on the outdoor unit side, the indoor unit side, and the thermostat side, when the non-communication air conditioning system is turned on and running until the indoor unit stops, the predicted set temperature is determined.

[0047] In step S140, on the indoor unit side, the absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature is determined as the indoor temperature difference of the indoor unit; wherein, the indoor ambient temperature of the indoor unit is, for example, the indoor ambient temperature T detected by the return air temperature sensor 83. in Specifically, this includes the indoor ambient temperature T in cooling mode. in_C And the indoor ambient temperature T in heating mode. in_H The predicted set temperature, such as the predicted user-set temperature value T. set Specifically, this includes the predicted user-set temperature value T in cooling mode. set_C And the predicted user-set temperature value T in heating mode. set_H The indoor temperature difference of the indoor unit, such as the indoor temperature difference |T in -T set |

[0048] In step S150, on the indoor unit side, based on the indoor temperature difference of the indoor unit, the compressor is controlled to operate at the compressor's current optimal energy efficiency frequency for energy saving, and / or the compressor is controlled to operate at the compressor's current optimal capacity frequency increase step size for frequency increase.

[0049] In the present invention, the non-communication air conditioning system has an outdoor unit and an indoor unit. The outdoor unit has a compressor, and the non-communication air conditioning system also has a thermostat. When the non-communication air conditioning system is powered on, the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit are acquired. On the outdoor unit side, based on the outdoor ambient temperature, the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step of the compressor are determined. On the outdoor unit side, the indoor unit side, and the thermostat side, when the non-communication air conditioning system has been running from startup to shutdown of the indoor unit, a predicted set temperature is determined. On the indoor unit side, the absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature is determined as the indoor temperature difference of the indoor unit. On the indoor unit side, based on the indoor temperature difference, the compressor is controlled to operate at the current optimal energy efficiency frequency for energy saving, and / or the compressor is controlled to operate at the current optimal capacity frequency increase step. Therefore, by controlling the compressor's operating status based on the outdoor ambient temperature and the temperature difference between the indoor and outdoor environments when there is no communication, the outdoor unit's operating status can meet the indoor load requirements, thus improving the user experience.

[0050] The solution of this invention can solve the limitation of compressor operating frequency in non-communication air conditioning systems, which mainly relies on outdoor ambient temperature to set the compressor's high and low frequency range. Because the indoor and outdoor units do not communicate using a communication chip, the outdoor unit cannot obtain the indoor unit's operating status and indoor environmental data. This leads to a mismatch between the outdoor unit's operating parameters and the indoor load demand, affecting the energy efficiency of the non-communication air conditioning system and the user's comfort experience.

[0051] In some embodiments, the control method for the non-communication air conditioning system described in the present invention further includes: the process of determining the optimal energy efficiency frequency point of the compressor under different outdoor temperature ranges, and the optimal capacity boosting frequency point of the compressor.

[0052] The following is combined Figure 2 The schematic diagram shows an embodiment of the method of the present invention, which defines the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor under different outdoor temperature ranges. It further illustrates the specific process of defining the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor under different outdoor temperature ranges, including steps S210 to S230.

[0053] Step S210: In advance, based on the target outdoor ambient temperature range that the non-communication air conditioning system can operate in, the target outdoor ambient temperature range is divided into two or more outdoor temperature intervals.

[0054] Step S220: For each of the two or more outdoor temperature ranges, determine the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor corresponding to each outdoor temperature range, that is, determine the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor in each outdoor temperature range.

[0055] Step S230: The optimal energy efficiency frequency point and the optimal capacity boost frequency point of the compressor under different outdoor temperature ranges are thus obtained. Furthermore, based on the optimal energy efficiency frequency point and the optimal capacity boost frequency point of the compressor under different outdoor temperature ranges, a correspondence between a set outdoor ambient temperature and a set optimal energy efficiency frequency and a set optimal capacity boost step size can be generated.

[0056] Taking the control logic of a non-communication air conditioning system in cooling mode as an example, Figure 8 This is a flowchart illustrating an embodiment of a method for efficient operation control of a non-communication air conditioning system in cooling mode. Figure 8 As shown, an efficient operation control method for a non-communication air conditioning system in cooling mode includes:

[0057] Step 11: Divide the outdoor ambient temperature into M outdoor temperature ranges according to the operating outdoor temperature range of the non-communication air conditioning system, where M is a positive integer, and then proceed to step 12.

[0058] In step 11, the outdoor ambient temperature is divided into M outdoor temperature ranges according to the operating outdoor temperature range of the non-communication air conditioning system. The M outdoor temperature ranges can be divided at equal intervals, such as every 2℃; or they can be divided according to the capacity characteristics of the non-communication air conditioning system. For example, if the capacity output of the non-communication air conditioning system is not significantly different in the 25℃~30℃ and 32℃~35℃ ranges, the step size for each outdoor temperature range can be different. For instance, if the unit's cooling capacity is approximately 10kW at 25℃, 26℃, 27℃, 28℃, 29℃, and 30℃, and approximately 9kW at 32℃, 33℃, 34℃, and 35℃, then the step size for the first range is 5℃ and the step size for the second range is 3℃, meaning the two ranges are divided according to the air conditioning system's capacity output characteristics, and the step sizes are different. The operating outdoor temperature range varies depending on the outdoor temperature range. It should be based on the outdoor temperature range for cooling operation of the air conditioning system without communication. For example, if the outdoor ambient temperature range for cooling operation of a certain product is -10℃ to 52℃, then the corresponding outdoor temperature range for operating the air conditioning system without communication is -10℃ to 52℃.

[0059] In the solution of this invention, the outdoor ambient temperature is divided into multiple outdoor temperature ranges, and each outdoor temperature range is preset with the highest energy efficiency operating parameters. The indoor unit determines the user's set temperature by stopping at the temperature point without communication. Based on the difference between the real-time indoor ambient temperature and the predicted set temperature, it sends two 24V switching signals, Y / Y1 and Y2, to the outdoor unit to control the compressor, ensuring the operating energy efficiency of the outdoor unit when the indoor load demand is low and the user comfort when the indoor load demand is high.

[0060] In some implementations, step S120, on the outdoor unit side, determines the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step size of the compressor based on the outdoor ambient temperature of the outdoor unit. This includes: a first process of determining the current optimal energy efficiency frequency and the current optimal capacity frequency increase step size of the compressor, or a second process of determining the current optimal energy efficiency frequency and the current optimal capacity frequency increase step size of the compressor.

[0061] The first process for determining the current optimal energy efficiency frequency and the current optimal capacity frequency ramp-up step size of the compressor is as follows:

[0062] The following is combined Figure 3 The schematic diagram shows an embodiment of the first process of determining the current optimal energy efficiency frequency and the current optimal capacity frequency ramp-up step size of the compressor in the method of the present invention. It further illustrates the specific process of determining the current optimal energy efficiency frequency and the current optimal capacity frequency ramp-up step size of the compressor in step S120, including steps S310 to S320.

[0063] Step S310: Based on the optimal energy efficiency frequency point of the compressor under different outdoor temperature ranges and the optimal capacity boost frequency point of the compressor.

[0064] Step S320: Determine the current outdoor temperature range to which the outdoor ambient temperature of the outdoor unit belongs among the different outdoor temperature ranges, take the optimal energy efficiency frequency point of the compressor under the current outdoor temperature range among the different outdoor temperature ranges as the current optimal energy efficiency frequency of the compressor, and take the optimal capacity boost frequency point of the compressor under the current outdoor temperature range among the different outdoor temperature ranges as the current optimal capacity boost step size of the compressor.

[0065] Alternatively, the second process for determining the compressor's current optimal energy efficiency frequency and the compressor's current optimal capacity frequency ramp-up step size is as follows:

[0066] On the outdoor unit side, based on the correspondence between the set outdoor ambient temperature, the set optimal energy efficiency frequency, and the set optimal capacity frequency increase step size, the set optimal energy efficiency frequency that is the same as the outdoor ambient temperature of the outdoor unit in the correspondence is taken as the current optimal energy efficiency frequency of the compressor, and the set optimal capacity frequency increase step size that is the same as the outdoor ambient temperature of the outdoor unit in the correspondence is taken as the current optimal capacity frequency increase step size of the compressor.

[0067] The correspondence between the set outdoor ambient temperature and the set optimal energy efficiency frequency and the set optimal capacity boosting step size is predetermined. Of course, the present invention may also include a process of pre-determining the correspondence between the set outdoor ambient temperature and the set optimal energy efficiency frequency and the set optimal capacity boosting step size. For example, given that the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor under different outdoor temperature ranges are known, the correspondence between the set outdoor ambient temperature and the set optimal energy efficiency frequency and the set optimal capacity boosting step size is generated based on the optimal energy efficiency frequency point and the optimal capacity boosting frequency point of the compressor under different outdoor temperature ranges.

[0068] In the solution of this invention, an outer ring outdoor temperature range is defined, and the highest energy efficiency frequency point of the compressor is preset, forming a correspondence between the outdoor environment outdoor temperature range division table and the preset compressor frequency value. For example, by changing the outdoor environment temperature, the frequency of the compressor when operating stably in different outdoor environment outdoor temperature ranges is recorded: if there is a different fixed operating frequency at different temperatures, that is, the optimal energy efficiency point. For example, when the outdoor temperature is 30℃, the compressor frequency of the optimal energy efficiency point is 50Hz; when the outdoor temperature is 40℃, the compressor frequency of the optimal energy efficiency point is 60Hz. That is, different temperature points or different temperature ranges correspond to an optimal frequency point, and the optimal frequency points corresponding to different temperature points or temperature ranges are usually different. Taking the control logic of a non-communication air conditioning system in cooling mode as an example, such as... Figure 8 As shown, the efficient operation control method for a non-communication air conditioning system in cooling mode also includes:

[0069] Step 12: Preset the operating point with the highest energy efficiency of the air conditioning system without communication within each outdoor temperature range, mainly the compressor's highest energy efficiency frequency point f. set_Cm Then proceed to step 13.

[0070] For example, within an outdoor temperature range of 33℃ to 35℃, the compressor's energy efficiency at 60Hz is significantly higher than at other frequency points. Therefore, within this outdoor temperature range, the compressor's highest energy efficiency frequency point f is... set_C Select 60Hz.

[0071] Among them, the compressor frequency with the highest energy efficiency in the non-communication air conditioning system within each outdoor temperature range is determined by testing the energy efficiency at different temperatures during the equipment design and manufacturing process.

[0072] In this invention, the outdoor ambient temperature is divided into multiple outdoor temperature ranges. Two compressor frequencies are preset for each range (i.e., the compressor's optimal energy efficiency frequency and the compressor's maximum capacity output frequency). When indoor load demand is low, the compressor in the outdoor unit operates at the optimal energy efficiency frequency; when indoor load demand is high, the compressor in the outdoor unit increases its frequency, operating at the compressor's maximum capacity output frequency. Compared to related solutions where the air conditioning system lacks communication and relies solely on outdoor ambient temperature to determine the compressor's operating frequency, the compressor in the outdoor unit of this invention reduces the number of start-stop cycles, making it more adaptable to changes in indoor load.

[0073] In some embodiments, the specific process of determining the predicted set temperature in step S130, on the outdoor unit side, the indoor unit side, and the thermostat side, after the non-communication air conditioning system is turned on and running until the indoor unit stops, is described in the following exemplary description.

[0074] The following is combined Figure 4 The schematic diagram of an embodiment of the method of the present invention for determining the predicted set temperature further illustrates the specific process of determining the predicted set temperature in step S130, including steps S410 to S420.

[0075] Step S410: On the outdoor unit side, after the non-communication air conditioning system is turned on, the compressor is defaulted to operate at the compressor's current optimal energy efficiency frequency.

[0076] Step S420: On both the thermostat side and the indoor unit side, the indoor unit stops operating after the indoor ambient temperature reaches the set temperature point; the indoor unit then controls the compressor to stop. The indoor ambient temperature at the time the indoor unit stops is then used as the predicted set temperature. Specifically, on the thermostat side, the indoor unit stops operating after the indoor ambient temperature reaches the set temperature point; on the indoor unit side, after the indoor ambient temperature reaches the set temperature point, the Y / Y1 and Y2 terminals of the indoor unit are simultaneously de-energized to stop the outdoor unit; on the indoor unit side, the indoor ambient temperature at the time the indoor unit stops is used as the predicted set temperature.

[0077] In the solution of this invention, the temperature setpoint is deduced by utilizing the indoor unit's shutdown behavior at a temperature point without communication: The shutdown signal sent by the indoor unit to the compressor is monitored; when the indoor unit issues a shutdown command because the indoor ambient temperature reaches the target point, the indoor return air temperature at this time is monitored and recorded; and this temperature value is regarded by the system as the user-set temperature for subsequent control. Alternatively, the indoor unit's main control data can be captured, and there is logic that records the indoor ambient temperature at the time of shutdown and assigns it to the set temperature. Taking the control logic of a non-communication air conditioning system in cooling mode as an example, such as... Figure 8 As shown, the efficient operation control method for a non-communication air conditioning system in cooling mode also includes:

[0078] Step 13: The non-communication air conditioning system uses the return air temperature sensor 83 and the outdoor ambient temperature sensor 84 to monitor the indoor and outdoor ambient temperatures in real time, and obtains the indoor ambient temperature T. in_C Outdoor ambient temperature T out_C The indoor return air temperature detected by the return air temperature sensor 83 is taken as the indoor ambient temperature T. in_C Then proceed to step 14.

[0079] Step 14: After the air conditioning system without communication is turned on, it defaults to the optimal frequency point f of the compressor in the outdoor unit under the current outdoor temperature range. set_Cm When running, when the indoor ambient temperature T in_C When the user-set temperature is reached after sending a power-on signal via the thermostat, the thermostat simultaneously de-energizes the terminals marked Y / Y1 and Y2 on the indoor unit. This simultaneous de-energization of the Y / Y1 and Y2 terminals on the indoor unit stops the outdoor unit. At this time, the indoor unit's main board records the value detected by the return air temperature sensor 83 (i.e., the current indoor return air temperature) and determines that this current indoor return air temperature value is the predicted user-set temperature value T. set_C Then proceed to step 15. The first temperature-point shutdown occurs when the thermostat detects that the indoor temperature has reached the set temperature (Tthermostat detected temperature = Tset temperature). The thermostat then sends a signal to the indoor unit's main board to de-energize the Y / Y1 terminal. At this point, the main board follows the preset logic—shutting down and recording the temperature at the return air outlet. Since the return air temperature and the thermostat detected temperature are the same as the indoor temperature, Treturn air temperature = Tthermostat detected temperature = Tset temperature. Therefore, the main board can accurately predict the user's set temperature.

[0080] In a non-communication air conditioning system, the indoor unit, outdoor unit, and thermostat lack a communication protocol; all signals are 24V electrical signals without numerical information. Common 24V electrical signal markings in non-communication air conditioning systems include G (indoor fan 41), Y / Y1 and Y2 (compressor 1), and B (four-way valve 3). The control method for these 24V signals is simply power on / off; for example, energizing G on the thermostat turns on the indoor fan, and de-energizing it turns it off. Therefore, the indoor unit needs to anticipate the user's set temperature T by observing the behavior of controlling the outdoor unit's shutdown. set_C .

[0081] The action of stopping the unit upon reaching the set temperature is initiated by a command sent by the thermostat. The thermostat sends a stop command to the indoor unit, causing it to shut down. When the indoor unit stops, the terminals marked Y / Y1 and Y2 on the indoor unit are simultaneously de-energized, controlling the outdoor unit to stop as well. The user sets the temperature through the thermostat. When the thermostat detects that the indoor ambient temperature has reached the user's set temperature (when the user sends a start signal), it sends a stop signal, de-energizing the YGB and other flags. While the temperature-based stop is always initiated by the thermostat, the indoor unit's mainboard records the return air temperature each time the thermostat sends a stop signal, allowing the mainboard to update the set temperature promptly if the user changes it.

[0082] In the solution of this invention, the indoor unit stops at a temperature point, allowing the indoor unit to obtain the user-set temperature without communication, which facilitates the fine control of the air conditioning system without communication.

[0083] In some implementations, in step S150, on the indoor unit side, the compressor is controlled to operate at its current optimal energy efficiency frequency for energy saving based on the indoor temperature difference of the indoor unit, and / or the compressor is controlled to operate at its current optimal capacity frequency increase step size for frequency increase. For details on this process, please refer to the following exemplary description.

[0084] The following is combined Figure 5 The schematic diagram shown is a flowchart of an embodiment of the method of the present invention, which controls the compressor to operate in energy-saving mode at the current optimal energy efficiency frequency and / or to operate at frequency increase step size at the current optimal capacity. It further illustrates the specific process of controlling the compressor to operate in energy-saving mode at the current optimal energy efficiency frequency and / or to operate at frequency increase step size at the current optimal capacity in step S150, including steps S510 to S540.

[0085] Step S510: On the indoor unit side, determine whether the indoor temperature difference of the indoor unit is greater than a first preset temperature threshold and less than or equal to a second preset temperature threshold. The first preset temperature threshold may be, for example, the shutdown temperature threshold δT. 停机 The second preset temperature threshold, such as the frequency upsampling temperature threshold δT 升频 .

[0086] Step S520: On the indoor unit side, if it is determined that the indoor temperature difference of the indoor unit is greater than the first preset temperature threshold and less than or equal to the second preset temperature threshold, then the compressor is controlled to operate at the compressor's current optimal energy efficiency frequency for energy saving.

[0087] Step S530: On the indoor unit side, if it is determined that the indoor temperature difference of the indoor unit is greater than the second preset temperature threshold, then the compressor is controlled to increase its frequency by the current optimal capacity step size; specifically, the compressor is controlled to increase its frequency by the current optimal capacity step size based on the current optimal energy efficiency frequency of the compressor.

[0088] In step S540, if it is determined on the indoor unit side that the indoor temperature difference of the indoor unit is less than or equal to the first preset temperature threshold, then the compressor is controlled to maintain the current state, that is, the compressor is controlled to maintain the shutdown state.

[0089] Taking the control logic of a non-communication air conditioning system in cooling mode as an example, such as Figure 8 As shown, the efficient operation control method for a non-communication air conditioning system in cooling mode also includes:

[0090] Step 15: The indoor unit's mainboard monitors and calculates the indoor ambient temperature T in real time. in_C Compared with the predicted user-set temperature value T set_C The temperature difference between them is the indoor temperature difference T. in_C -T set_C Then proceed to step 16.

[0091] Step 16: Obtain the indoor ambient temperature T in_C Compared with the predicted user-set temperature value T set_C Temperature difference T between in_C -T set_C Next, determine the indoor temperature difference T. in_C -T set_C The size is determined, and step 17, step 18, or step 19 is executed based on the judgment result.

[0092] Step 17, when the indoor temperature difference T in_C -T set_C Exceeding the shutdown temperature threshold δT 停机_C However, it did not exceed the frequency rise temperature threshold δT升频_C (Shutdown temperature threshold δT) 停机_C <T in_C -T set_C ≤ Frequency rise temperature threshold δT 升频_C When the indoor unit sends a Y / Y1 switch signal (i.e., the first set control signal used to control the compressor) to the outdoor unit, it controls the compressor to operate at the optimal frequency point f set_Cm Run; if the above temperature difference conditions are not met, proceed to step 18 for further judgment. Shutdown threshold δT 停机_C Frequency upsampling threshold δT 升频_C It is written into the control logic during product design based on product characteristics or market demands. Shutdown threshold δT 停机_C The set value is usually 0~1℃, preferably 0.5℃; the upsampling threshold δT 升频_C The setting value is usually 1~2℃, preferably 2℃.

[0093] Specifically, the indoor unit sends a Y / Y1 switch signal (i.e., the first set control signal used to control the compressor) to the outdoor unit. In this process, the Y1 flag terminal of the indoor unit is energized to the Y1 flag terminal of the outdoor unit. The Y flag terminal of a non-communication air conditioning system usually has two flag terminals, Y1 and Y2, and the so-called signal is energization.

[0094] Indoor temperature difference T in_C -T set_C At lower temperatures, indoor demand load is also lower. Variable frequency air conditioning systems with communication capabilities (such as those using RS485 communication protocol) often control the compressor to run at a low frequency under these conditions. However, air conditioning systems without communication capabilities transmit very limited information. Therefore, prioritizing operation at the optimal energy efficiency frequency point is the best choice without wasting limited information transmission.

[0095] Step 18, when the indoor temperature difference T in_C -T set_C Exceeding the frequency rise temperature threshold δT 升频_C (Frequency rise temperature threshold δT) 升频_C <T in_C -T set_C When the compressor is in operation, the indoor unit sends a Y2 switch signal (i.e., a second setting control signal used to control the compressor) to the outdoor unit, controlling the compressor to appropriately increase its frequency, that is, setting the compressor's frequency to the optimal frequency point f. set_Cm + Frequency upsampling step size δf m_C During operation, the frequency ramp-up step size can be set differently based on the outdoor ambient temperature. For example, in high-temperature outdoor conditions, the ramp-up step size can be set to δf. m_C =5Hz, outdoor low temperature operating condition is set to frequency increase step size δf m_C =8Hz.

[0096] Similarly, indoor temperature difference Tin_C -T set_C As the temperature difference increases, the load also increases. The non-communication air conditioning system only has one remaining compressor signal flag available. Therefore, this flag is defined as an up-frequency signal to ensure that the non-communication air conditioning system can output sufficient capacity to prevent the indoor thermal comfort from deteriorating.

[0097] Step 19, if the indoor temperature difference T in_C -T set_C If neither of the conditions in steps 17 nor 18 is met, the indoor unit mainboard will simultaneously de-energize the terminals marked Y / Y1 and Y2, return to step 15, and continuously monitor and calculate the indoor temperature difference T. in_C -T set_C .

[0098] When the indoor unit main board simultaneously disconnects power to the terminals marked Y / Y1 and Y2, it means the compressor 1 is shut down. For example, G power off - indoor fan 41 shuts down; Y / Y1 and Y2 terminals simultaneously disconnected - compressor 1 shuts down; B power off - four-way valve 3 closes. See details in [link to relevant documentation]. Figure 10 The example shown.

[0099] like Figure 10 As shown, the wiring diagram for an air conditioner mainboard without communication is generally provided. It typically has two terminals, Y / Y1 and Y2. Powering on Y / Y1 indicates sending a signal to the first-stage compressor; powering on Y2 indicates sending a signal to the second-stage compressor; simultaneously de-energizing both Y / Y1 and Y2 indicates a stop signal; Y / Y1 and Y2 must not be powered on simultaneously. Figure 10 The diagram shows the wiring relationship between the indoor and outdoor unit thermostats (only commonly used terminals are shown). R and C are for 24V power supply; Y / Y1 is the primary compressor signal; Y2 is the secondary compressor signal; B is the four-way valve control signal; and G is the indoor fan control signal.

[0100] In step 19, the indoor temperature difference T in_C -T set_C There are two scenarios if neither of the conditions in steps 17 and 18 is met:

[0101] Scenario 1: Indoor temperature difference T in_C -T set_C Small, for example, the predicted user-set temperature T set_C The actual indoor ambient temperature is 24℃. in_C The indoor temperature is 24.5℃, and a difference of only 0.5℃ will not show a significant difference in thermal comfort, so there is no need to turn on the machine.

[0102] The second scenario: Indoor ambient temperature T in_C Compared to the predicted user-set temperature T set_CThe temperature is low, so the machine should not be turned on in cooling mode, and the same applies to heating mode.

[0103] In this invention, a Y / Y1 or Y2 switch signal is sent to the outdoor unit based on the indoor temperature difference. This can be achieved by energizing the Y / Y1 terminal of the indoor unit and sending a first set control signal to the outdoor unit to control the compressor, or by energizing the Y2 terminal of the indoor unit and sending a second set control signal to the outdoor unit to control the compressor. An oscilloscope is used to directly measure the Y / Y1 and Y2 signal lines sent from the indoor unit to the outdoor unit. When the indoor temperature difference changes and reaches a certain fixed temperature threshold, the oscilloscope can detect a continuous high-level signal at the Y / Y1 terminal; when the indoor temperature difference exceeds a higher temperature threshold, the oscilloscope can detect a continuous high-level signal at the Y2 terminal. Within any fixed outdoor temperature range, the compressor has two fixed operating frequencies: the operating frequency curve of the compressor is recorded by adjusting the indoor ambient temperature. The compressor frequency variation pattern exhibits a two-stage characteristic: when the indoor temperature difference is low, it stabilizes at a fixed frequency point related to the ambient temperature (i.e., f in the scheme of this invention). set_Cm When the indoor temperature difference exceeds a specific temperature threshold, it will directly jump to a higher fixed frequency point (i.e., f in the scheme of this invention). set_Cm +δf m (not continuous change).

[0104] This invention provides a control scheme for a non-communication-based air conditioning system, prioritizing either high compressor efficiency or user comfort under varying indoor load demands. The invention targets non-communication-based air conditioning systems. Due to limitations in information communication, the compressor frequency in this scheme is preset. Specifically, the outdoor ambient temperature is divided into multiple temperature ranges, and two compressor frequencies are preset for each range (the optimal efficiency frequency and the frequency at which the compressor outputs its maximum capacity). The indoor unit sends two signals to the outdoor compressor based on the indoor temperature difference (Y / Y1 and Y2 switching signals, both 24V switching signals used to control the compressor). The outdoor unit controls the compressor to operate at the preset frequency based on the received Y1 or Y2 switching signal. This invention does not restrict operating modes; the intended goal is to balance energy efficiency and comfort in a non-communication-based air conditioning system. This invention addresses the issue that non-communication-based air conditioning systems cannot send numerical temperature or temperature difference signals; instead, it utilizes limited switching signals to control the compressor at a preset frequency, thus enabling the system to balance compressor efficiency and user comfort under different load demands.

[0105] In some embodiments, a first marking terminal and a second marking terminal are provided; both the first marking terminal and the second marking terminal of the indoor unit are used to control the operating state of the compressor. The first marking terminal of the indoor unit is a terminal marked with Y or Y1, that is, the first marking terminal of the indoor unit is a terminal marked with Y / Y1, and the second marking terminal of the indoor unit is a terminal marked with Y2. In step S130, on the indoor side, after the non-communication air conditioning system is turned on and runs until the indoor unit stops, this includes: on the indoor side, simultaneously de-energizing both the first marking terminal and the second marking terminal of the indoor unit to stop the compressor; of course, if the compressor is controlled to maintain its current state, and the current state of the compressor is a stopped state, simultaneously de-energizing both the first marking terminal and the second marking terminal of the indoor unit is maintained to control the compressor to remain stopped.

[0106] And / or, in step S150, on the indoor side, controlling the compressor to operate at the compressor's current optimal energy efficiency frequency for energy saving includes: on the indoor side, energizing the first indicator terminal of the indoor unit, and the outdoor unit sending a first set control signal to control the compressor to make the compressor operate at the compressor's current optimal energy efficiency frequency; wherein, the first set control signal for controlling the compressor is, for example, a Y / Y1 switch signal (i.e., the first set control signal for controlling the compressor).

[0107] And / or, in step S150, on the indoor side, controlling the compressor to operate at an increased frequency step size according to the compressor's current optimal capacity includes: on the indoor side, energizing the second indicator terminal of the indoor unit and sending a second setting control signal to the outdoor unit to control the compressor, so that the compressor operates at an increased frequency step size according to the compressor's current optimal energy efficiency frequency. The second setting control signal for controlling the compressor may be, for example, a Y2 switch signal (i.e., the second setting control signal for controlling the compressor).

[0108] The control logic of a non-communication air conditioning system in heating mode is similar to that in cooling mode, except that the corresponding parameters are those used in heating mode instead of cooling mode. Figure 9 This is a flowchart illustrating an embodiment of a method for efficient operation control of a non-communication air conditioning system in heating mode. Figure 9As shown, the efficient operation control method for a non-communication air conditioning system in heating mode includes:

[0109] Step 21: Divide the outdoor ambient temperature into N outdoor temperature ranges according to the operating outdoor temperature range of the non-communication air conditioning system, where N is a positive integer, and then proceed to step 22.

[0110] In step 21, the method for dividing the N outdoor temperature ranges is the same as the method for dividing the M outdoor temperature ranges in the cooling mode.

[0111] Step 22: Preset the operating point with the highest energy efficiency of the air conditioning system without communication within each outdoor temperature range, mainly the compressor's highest energy efficiency frequency point f. set_Hn Then proceed to step 13.

[0112] Step 23: The non-communication air conditioning system uses the return air temperature sensor 83 and the outdoor ambient temperature sensor 84 to monitor the indoor and outdoor ambient temperatures in real time to obtain the indoor ambient temperature T. in_H Outdoor ambient temperature T out_H The indoor return air temperature detected by the return air temperature sensor 83 is taken as the indoor ambient temperature T. in_H Then proceed to step 24.

[0113] Step 24: After the air conditioning system without communication is turned on, it defaults to the optimal frequency point f of the compressor in the outdoor unit under the current outdoor temperature range. set_Hn When running, when the indoor ambient temperature T in_H When the user-set temperature is reached after sending a power-on signal via the thermostat, the terminals marked Y / Y1 and Y2 on the indoor unit are simultaneously de-energized, stopping the outdoor unit. At this time, the indoor unit's mainboard records the value detected by the return air temperature sensor 83 (i.e., the current indoor return air temperature) and determines that this current indoor return air temperature is the predicted user-set temperature value T. set_H Then proceed to step 25.

[0114] Step 25: The indoor unit's mainboard monitors and calculates the indoor ambient temperature T in real time. in_H Compared with the predicted user-set temperature value T set_H The temperature difference between them is the indoor temperature difference T. in_H -T set_H Then proceed to step 26.

[0115] Step 26: Obtain the indoor ambient temperature T in_H Compared with the predicted user-set temperature value T set_H Temperature difference T between in_H -T set_H Next, determine the indoor temperature difference T. in_H -T set_HThe size is determined, and step 27, step 28, or step 29 is executed based on the judgment result.

[0116] Step 27, when the indoor temperature difference T in_C -T set_C Exceeding the shutdown temperature threshold δT 停机_H However, it did not exceed the frequency rise temperature threshold δT 升频_H (Shutdown temperature threshold δT) 停机_H <T set_H -T in_H ≤ Frequency rise temperature threshold δT 升频_H When the indoor unit sends a Y / Y1 switch signal (i.e., the first set control signal used to control the compressor) to the outdoor unit, it controls the compressor to operate at the optimal frequency point f set_Hn Run; if the above temperature difference conditions are not met, proceed to step 28 for further judgment. Shutdown threshold δT 停机_C The set value is usually 0~1℃, preferably 0.5℃; the upsampling threshold δT 升频_C The setting value is usually 1~2℃, preferably 2℃.

[0117] Step 28, when the indoor temperature difference T in_C -T set_C Exceeding the frequency rise temperature threshold δT 升频_H (δT) 升频_H <T set_H -T in_H When the compressor is in operation, the indoor unit sends a Y2 switch signal (i.e., a second setting control signal used to control the compressor) to the outdoor unit, controlling the compressor to appropriately increase its frequency, that is, setting the compressor's frequency to the optimal frequency point f. set_Hn + Frequency upsampling step size δf n_H During operation, the frequency ramp-up can be set at different times based on the outer ring temperature.

[0118] Step 29, if the indoor temperature difference T in_C -T set_C If neither of the conditions in steps 27 nor 28 is met, the indoor unit mainboard will simultaneously de-energize the terminals marked Y / Y1 and Y2, return to step 25, and continuously monitor and calculate the indoor temperature difference T. in_C -T set_C .

[0119] In the solution of this invention, the indoor unit sends two signals to the compressor in the outdoor unit (i.e., sending Y / Y1 switch signal and Y2 switch signal, two 24V switch signals used to control the compressor) based on the predicted temperature difference between the user-set temperature and the indoor ambient temperature. This controls the compressor to operate at different set frequencies, ensuring that the non-communication air conditioning system actively balances the energy efficiency of the compressor in the outdoor unit and the user's comfort experience under different load demands.

[0120] In this invention, the outdoor ambient temperature is divided into multiple outdoor temperature ranges (outdoor ambient temperature is one of the main factors affecting the air conditioning operating load; dividing the ranges can be considered as dividing different operating loads). Optimal compressor operating frequency points and frequency boosting points to ensure capacity output are preset for different outdoor temperature ranges. Since there is no communication protocol between the indoor unit, outdoor unit, and thermostat, after the user turns on the unit and sets the temperature, the non-communication air conditioning system can only receive the user's start-up signal and cannot obtain the user's set temperature. In this invention, after the non-communication air conditioning system reaches the set temperature, the thermostat sends a stop signal to the non-communication air conditioning system, records the current indoor ambient temperature, and stores this value in the controller (such as the indoor unit's mainboard) to replace the user's set temperature, thus obtaining the predicted user-set temperature. Furthermore, based on the indoor temperature difference (i.e., the difference between the real-time indoor ambient temperature and the predicted user-set temperature), the indoor unit sends two signals to the compressor in the outdoor unit (i.e., sending a Y / Y1 switch signal and a Y2 switch signal, both 24V switch signals used to control the compressor). Specifically: when the indoor temperature difference is small, the indoor unit sends a Y / Y1 switch signal (i.e., a first set control signal for controlling the compressor) to the compressor in the outdoor unit, controlling the compressor to operate at the optimal energy-efficient frequency point, ensuring energy-saving operation of the non-communication air conditioning system; when the indoor temperature difference is large, the indoor unit sends a Y2 switch signal (i.e., a second set control signal) to the compressor in the outdoor unit, ensuring that the compressor in the non-communication air conditioning system has sufficient output capacity to guarantee indoor environmental comfort. The control scheme for a non-communication air conditioning system provided by this invention is logically simple and reliable, achieving efficient control of the non-communication air conditioning system without relying on additional components or parts, and is applicable to both new product development and the retrofitting of existing products.

[0121] In this invention, the temperature acquisition method is set as follows: temperature point shutdown is determined (reverse logic). Outdoor ambient temperature zoning and frequency point presets are implemented: the outdoor ambient temperature is divided into multiple outdoor temperature ranges, and the optimal energy efficiency frequency point for the compressor is preset in each outdoor temperature range as the basic operating frequency. Compressor frequency control: each outdoor temperature range has two fixed values: the optimal energy efficiency frequency point and the frequency ramp-up point that ensures load requirements. Communication protocol dependency: no communication chip is required.

[0122] In contrast, related solutions rely solely on continuous indoor temperature adjustment, neglecting outdoor ambient temperature. The present invention, however, optimizes energy efficiency by segmenting outdoor ambient temperatures and pre-setting optimal frequency points, even without a communication architecture. Related solutions involve continuous adjustment, allowing the frequency to vary arbitrarily within a given range. The present invention utilizes 24V switching signals (Y / Y1 and Y2 switching signals) corresponding to two fixed frequencies: the optimal energy efficiency frequency and a frequency ramp-up point that meets load requirements. Thus, even without communication chips or protocols, and only transmitting switching signals, the outdoor unit maintains high energy efficiency and comfort under varying load conditions.

[0123] Regarding the compressor frequency adjustment method, the temperature difference mentioned in related solutions is not the actual temperature difference but the target temperature difference (essentially a duration control): In cooling mode, if the air conditioning unit does not receive a user's shutdown or mode switching command after running for a period of time, it is assumed that the actual temperature is significantly different from the user's desired set temperature. The compressor's output capacity is increased by lowering the target temperature. Related solutions require a period of operation before determining if the temperature difference is too large, and then rely on adjusting the target temperature to control the compressor to increase its frequency, resulting in a relatively long response time. In contrast, the solution of this invention adjusts the compressor's output capacity based on the actual temperature difference: once the temperature difference exceeds a certain threshold, a Y / Y1 switch signal or a Y2 switch signal is sent to control the compressor's operation. The actual temperature difference control used in this invention has a faster response speed than the duration control in the comparative documents; the frequency increases as soon as the temperature difference reaches the second threshold, with almost no response time. Furthermore, the control method of this invention can more promptly meet the comfort experience requirements.

[0124] The technical solution of this embodiment addresses a non-communication air conditioning system, which includes an outdoor unit and an indoor unit. The outdoor unit has a compressor, and the system also includes a thermostat. When the non-communication air conditioning system is powered on, the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit are acquired. On the outdoor unit side, based on the outdoor ambient temperature, the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step size of the compressor are determined. On the outdoor unit side, the indoor unit side, and the thermostat side, after the non-communication air conditioning system is powered on and running until the indoor unit stops, a predicted set temperature is determined. On the indoor unit side, the absolute value of the difference between the indoor ambient temperature and the predicted set temperature is determined as the indoor temperature difference of the indoor unit. On the indoor unit side, based on the indoor temperature difference, the compressor is controlled to operate at its current optimal energy efficiency frequency for energy saving, and / or the compressor is controlled to operate at its current optimal capacity frequency increase step size. Therefore, by controlling the compressor's operation based on the outdoor and indoor temperature differences even without communication, the outdoor unit's operation matches the indoor load requirements, improving the user experience. This communication-free air conditioning system is an energy-saving refrigeration and air conditioning device.

[0125] Specifically, in the solution of this invention, for a non-communication air conditioning system, the non-communication air conditioning system has an outdoor unit, an indoor unit, and a thermostat, and the outdoor unit has a compressor (such as compressor 1); to address the problem of controlling the compressor frequency in a non-communication air conditioning system to adapt to indoor load demands, a first indicator terminal (such as a terminal marked Y / Y1) and a second indicator terminal (such as a terminal marked Y2) are provided for transmitting signals to control the compressor's operating status during the operation of the non-communication air conditioning system. When both the Y / Y1 and Y2 terminals are simultaneously de-energized, the compressor stops; when either the Y / Y1 or Y2 terminal is energized, the compressor starts; and when the Y / Y1 terminal is energized, it indicates that the compressor is operating at its optimal frequency point f. set When the Y2 terminal is energized, it indicates that the compressor is operating at its optimal frequency. set + Frequency upsampling point δf m Operation; Divide the outdoor temperature range of the non-communication air conditioning system into several outdoor temperature intervals (e.g., divide into M intervals in cooling mode or N intervals in heating mode with equal steps, or divide into M intervals in cooling mode or N intervals in heating mode with unequal steps based on the capacity differences of the non-communication air conditioning system). Set two frequency points for the compressor for each outdoor temperature interval (e.g., the compressor's optimal frequency point f). set and the compressor's up-frequency point δf mThis means setting two operating frequencies for the compressor (i.e., the compressor operates at its optimal frequency point f). set The compressor is running at its optimal frequency point f. set + Frequency upsampling point δf m (Running); after the air conditioning system receives the start-up signal sent by the user through the thermostat and starts up, it defaults to the compressor's optimal frequency point f under the current outdoor temperature range. set The thermostat is running and monitoring the indoor ambient temperature T. in After reaching the actual set temperature when the user sends the start-up signal via the thermostat, the thermostat simultaneously de-energizes the Y / Y1 and Y2 terminals on the indoor unit (the Y / Y1 and Y2 terminals are used to control the compressor's start-up and shutdown). This simultaneous de-energization of the Y / Y1 and Y2 terminals on the indoor unit controls the outdoor unit to shut down (primarily controlling the outdoor unit's compressor). The indoor unit's main board uses the indoor ambient temperature at the time the indoor unit shuts down as the predicted user-set temperature T. set The indoor unit's mainboard monitors and calculates the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = T. in -T set When the indoor temperature difference ΔT is greater than the preset shutdown temperature threshold δT 停机 And less than or equal to the preset frequency rise temperature threshold δT 升频 When the first indicator terminal of the indoor unit is energized, and the first indicator terminal of the indoor unit sends a first set control signal to the outdoor unit to control the compressor, so that the compressor operates at the optimal frequency point f set Run, set time, then return to re-monitor and calculate the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = T. in -T set When the indoor temperature difference ΔT is greater than the preset frequency-up temperature threshold δT 升频 The indoor unit sends a second setting control signal to the outdoor unit via its second marking terminal to control the compressor, causing the compressor to operate at its optimal frequency point f. set + Frequency upsampling point δf m Run, set time, then return to re-monitor and calculate the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = T. in -T setWhen the indoor temperature difference ΔT is less than or equal to the preset shutdown temperature threshold δT 停机 The indoor unit will simultaneously disconnect the power to the terminals marked Y / Y1 and Y2, and after the set time, return to re-monitor and calculate the current indoor ambient temperature T. in Compared with the predicted user-set temperature T set The absolute value of the difference is the indoor temperature difference ΔT = |T in -T set Therefore, by controlling the compressor's operation based on the outdoor and indoor temperature differences when communication is unavailable (e.g., controlling the compressor to stop, controlling it to start and operate at the optimal frequency point corresponding to the current outdoor conditions for energy saving, or operating at an appropriately increased frequency point corresponding to the current outdoor conditions), the outdoor unit's operating status is made to meet the indoor load requirements, saving energy, improving indoor comfort, and enhancing the user experience. This communication-free air conditioning system is an energy-saving refrigeration and air conditioning equipment.

[0126] According to embodiments of the present invention, a control device for a non-communication air conditioning system, corresponding to a control method for a non-communication air conditioning system, is also provided. See also Figure 6 The diagram shows a structural schematic of an embodiment of the device of the present invention. This non-communication air conditioning system belongs to the category of energy-saving refrigeration and air conditioning equipment. The control device of this non-communication air conditioning system may include: an acquisition unit and a control unit.

[0127] The acquisition unit is configured to acquire the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit when the non-communication air conditioning system is powered on. When acquiring the outdoor ambient temperature, the acquisition unit can be a temperature detection unit on the outdoor unit side; and when acquiring the indoor ambient temperature, the acquisition unit can be an acquisition unit on the indoor unit side and / or a temperature detection unit on the thermostat side. The outdoor ambient temperature of the outdoor unit may be the temperature detected by the outdoor ambient temperature sensor 84; the indoor ambient temperature of the indoor unit may be the temperature detected by the return air temperature sensor 83, specifically, the indoor return air temperature detected by the return air temperature sensor 83 is used as the indoor ambient temperature T. in For details on the specific functions and processing of this acquisition unit, please refer to step S110.

[0128] The control unit is configured to determine the current optimal energy efficiency frequency of the compressor and the current optimal capacity boost step size of the compressor based on the outdoor ambient temperature of the outdoor unit. Of course, when executing the control logic on the outdoor unit side, the control unit can be a controller on the outdoor unit side. The current optimal energy efficiency frequency of the compressor is, for example, the compressor's highest energy efficiency frequency point f. setThe current optimal capacity ramp-up step size of the compressor, such as ramp-up step size δf. m The specific functions and processing of this control unit are described in step S120.

[0129] The control unit is further configured to determine a predicted set temperature on the outdoor unit side, the indoor unit side, and the thermostat side, when the non-communication air conditioning system is turned on and running until the indoor unit stops. Of course, when executing the control logic on the outdoor unit side, the control unit can be the controller on the outdoor unit side; when executing the control logic on the indoor unit side, the control unit can be the controller on the indoor unit side; and when executing the control logic on the thermostat side, the control unit can be the controller on the thermostat side. The specific functions and processing of this control unit are further described in step S130.

[0130] The control unit is further configured to determine, on the indoor unit side, the absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature, as the indoor temperature difference of the indoor unit; of course, when executing the control logic on the indoor unit side, the control unit can be the controller on the indoor unit side. The indoor ambient temperature of the indoor unit, such as the indoor ambient temperature T detected by the return air temperature sensor 83, is... in Specifically, this includes the indoor ambient temperature T in cooling mode. in_C And the indoor ambient temperature T in heating mode. in_H The predicted set temperature, such as the predicted user-set temperature value T. set Specifically, this includes the predicted user-set temperature value T in cooling mode. set_C And the predicted user-set temperature value T in heating mode. set_H The indoor temperature difference of the indoor unit, such as the indoor temperature difference |T in -T set For details on the specific functions and processing of this control unit, please refer to step S140.

[0131] The control unit is further configured to, on the indoor unit side, control the compressor to operate at its current optimal energy efficiency frequency for energy saving, and / or control the compressor to operate at its current optimal capacity frequency increase step size, based on the indoor temperature difference of the indoor unit. Of course, when executing the control logic on the indoor unit side, the control unit can be the controller on the indoor unit side. For the specific functions and processing of this control unit, please refer to step S150.

[0132] In the present invention, the non-communication air conditioning system has an outdoor unit and an indoor unit. The outdoor unit has a compressor, and the non-communication air conditioning system also has a thermostat. When the non-communication air conditioning system is powered on, the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit are acquired. On the outdoor unit side, based on the outdoor ambient temperature, the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step of the compressor are determined. On the outdoor unit side, the indoor unit side, and the thermostat side, when the non-communication air conditioning system has been running from startup to shutdown of the indoor unit, a predicted set temperature is determined. On the indoor unit side, the absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature is determined as the indoor temperature difference of the indoor unit. On the indoor unit side, based on the indoor temperature difference, the compressor is controlled to operate at the current optimal energy efficiency frequency for energy saving, and / or the compressor is controlled to operate at the current optimal capacity frequency increase step. Therefore, by controlling the compressor's operating status based on the outdoor ambient temperature and the temperature difference between the indoor and outdoor environments when there is no communication, the outdoor unit's operating status can meet the indoor load requirements, thus improving the user experience.

[0133] Since the processing and functions implemented by the device in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0134] According to an embodiment of the present invention, a non-communication air conditioning system corresponding to a control device for a non-communication air conditioning system is also provided. This non-communication air conditioning system may include the control device for a non-communication air conditioning system described above. This non-communication air conditioning system belongs to the category of energy-saving refrigeration and air conditioning equipment.

[0135] Since the processing and functions implemented by the non-communication air conditioning system in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned devices, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0136] According to an embodiment of the present invention, a computer program product corresponding to a control method for a non-communication air conditioning system is also provided, comprising a computer program that, when executed by a processor, implements the steps of the control method for a non-communication air conditioning system described above.

[0137] Since the processing and functions implemented by the product in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0138] According to an embodiment of the present invention, a storage medium corresponding to a control method for a non-communication air conditioning system is also provided. The storage medium includes a stored program, wherein, when the program is executed, the device where the storage medium is located executes the steps of the control method for the non-communication air conditioning system described above.

[0139] Since the processing and functions implemented by the storage medium in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned methods, any details not covered in the description of this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0140] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0141] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A control method for a non-communication air conditioning system, characterized in that, The non-communication air conditioning system has an outdoor unit and an indoor unit, and the outdoor unit has a compressor; the control method of the non-communication air conditioning system includes: Obtain the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit; Based on the outdoor ambient temperature of the outdoor unit, determine the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step size of the compressor. Determine the predicted set temperature after the non-communication air conditioning system is turned on and runs until the indoor unit stops. The absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature is determined as the indoor temperature difference of the indoor unit. Based on the indoor temperature difference of the indoor unit, control the compressor to operate at the compressor's current optimal energy efficiency frequency for energy saving, and / or control the compressor to operate at the compressor's current optimal capacity frequency increase step size.

2. The control method for a non-communication air conditioning system according to claim 1, characterized in that, Also includes: In advance, based on the target outdoor ambient temperature range in which the non-communication air conditioning system can operate, the target outdoor ambient temperature range is divided into two or more outdoor temperature intervals. For each of the two or more outdoor temperature ranges, determine the optimal energy efficiency frequency point of the compressor and the optimal capacity boost frequency point of the compressor corresponding to each outdoor temperature range; In this way, the optimal energy efficiency frequency point of the compressor and the optimal capacity boost frequency point of the compressor under different outdoor temperature ranges are obtained.

3. The control method for a communication-free air conditioning system according to claim 1 or 2, characterized in that, Based on the outdoor ambient temperature of the outdoor unit, determine the current optimal energy efficiency frequency of the compressor and the current optimal capacity frequency increase step size of the compressor, including: Based on the optimal energy efficiency frequency point of the compressor under different outdoor temperature ranges, and the optimal capacity boost frequency point of the compressor; Determine the current outdoor temperature range to which the outdoor unit's outdoor ambient temperature belongs among the different outdoor temperature ranges, take the compressor's optimal energy efficiency frequency point under the current outdoor temperature range as the compressor's current optimal energy efficiency frequency, and take the compressor's optimal capacity boost frequency point under the current outdoor temperature range as the compressor's current optimal capacity boost step size. or, Based on the correspondence between the set outdoor ambient temperature, the set optimal energy efficiency frequency, and the set optimal capacity frequency increase step size, the set optimal energy efficiency frequency that is the same as the outdoor ambient temperature of the outdoor unit in the correspondence is taken as the current optimal energy efficiency frequency of the compressor, and the set optimal capacity frequency increase step size that is the same as the outdoor ambient temperature of the outdoor unit in the correspondence is taken as the current optimal capacity frequency increase step size of the compressor.

4. The control method for a non-communication air conditioning system according to any one of claims 1 to 3, characterized in that, Determining the predicted set temperature after the non-communication air conditioning system is turned on and operates until the indoor unit stops includes: After the non-communication air conditioning system is turned on, the compressor is set to operate at its current optimal energy efficiency frequency by default. The indoor unit stops operating once the indoor ambient temperature reaches the set temperature point; the indoor unit then controls the compressor to stop; and the indoor ambient temperature at the time the indoor unit stops is used as the predicted set temperature.

5. The control method for a non-communication air conditioning system according to any one of claims 1 to 4, characterized in that, Based on the indoor temperature difference of the indoor unit, control the compressor to operate at its current optimal energy efficiency frequency for energy saving, and / or control the compressor to operate at its current optimal capacity frequency increase step size, including: Determine whether the indoor temperature difference of the indoor unit is greater than the first preset temperature threshold and less than or equal to the second preset temperature threshold. If it is determined that the indoor temperature difference of the indoor unit is greater than the first preset temperature threshold and less than or equal to the second preset temperature threshold, then the compressor is controlled to operate at the compressor's current optimal energy efficiency frequency for energy saving. If it is determined that the indoor temperature difference of the indoor unit is greater than the second preset temperature threshold, then the compressor is controlled to increase its frequency by the current optimal capacity step size. If it is determined that the indoor temperature difference of the indoor unit is less than or equal to the first preset temperature threshold, then the compressor is controlled to maintain the current state.

6. The control method for a non-communication air conditioning system according to any one of claims 1 to 5, characterized in that, A first and a second indicator terminal are provided; both the first and second indicator terminals of the indoor unit are used to control the operating status of the compressor; wherein, The situation where the non-communication air conditioning system runs from startup to shutdown of the indoor unit includes: The compressor is stopped when both the first and second indicator terminals of the indoor unit are simultaneously de-energized. And / or, Controlling the compressor to operate at its current optimal energy efficiency frequency for energy saving includes: The first indicator terminal of the indoor unit is energized, and the first indicator terminal of the indoor unit sends a first set control signal to the outdoor unit to control the compressor, so that the compressor operates in energy-saving mode at the current optimal energy efficiency frequency of the compressor; And / or, Controlling the compressor to operate at a frequency increase step size according to the compressor's current optimal capacity includes: The second indicator terminal of the indoor unit is energized, and the second indicator terminal of the indoor unit sends a second set control signal to the outdoor unit to control the compressor, so that the compressor operates by increasing its frequency step by step according to the compressor's current optimal capacity, based on the compressor's current optimal energy efficiency frequency.

7. A control device for a non-communication air conditioning system, characterized in that, include: The acquisition unit is configured to acquire the outdoor ambient temperature of the outdoor unit and the indoor ambient temperature of the indoor unit; The control unit is configured to determine the current optimal energy efficiency frequency of the compressor and the current optimal capacity boost step size of the compressor based on the outdoor ambient temperature of the outdoor unit. The control unit is also configured to determine the predicted set temperature when the non-communication air conditioning system is turned on and the indoor unit is turned off. The control unit is further configured to determine the absolute value of the difference between the indoor ambient temperature of the indoor unit and the predicted set temperature, as the indoor temperature difference of the indoor unit. The control unit is also configured to control the compressor to operate at its current optimal energy efficiency frequency based on the indoor temperature difference of the indoor unit, and / or control the compressor to operate at its current optimal capacity frequency increase step size.

8. A communication-free air conditioning system, characterized in that, include: The control device for a non-communication air conditioning system as described in claim 7.

9. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the control method of any one of claims 1 to 6 for a non-communication air conditioning system.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the control method for the non-communication air conditioning system as described in any one of claims 1 to 6.

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