Refrigeration control method, controller and air conditioning system of air conditioning system

Abstract

The application discloses a refrigeration control method and controller of an air conditioning system and the air conditioning system. In the refrigeration mode, if the difference between the indoor environment temperature and the set temperature is less than a preset first temperature value, the mode based on the indoor coil temperature is entered, the target coil temperature is determined according to the rotating speed of the indoor fan, and then the operating frequency of the compressor is controlled according to the indoor coil temperature and the target coil temperature. In this mode, the corresponding target coil temperature can be matched according to different rotating speeds, and then the outlet air temperature is adjusted. On the one hand, the situation that the indoor environment temperature approaches the set temperature and the low air volume gear is turned in the prior art can be avoided, the air field of the indoor unit effectively disturbs the indoor air, and on the other hand, the indoor environment temperature detected by the air conditioning system is close to the user's thermal sensation temperature through the control of the outlet air temperature, and the comfort of the user in the use process is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning system control technology, and in particular to a refrigeration control method, controller and air conditioning system for an air conditioning system. Background Technology

[0002] During the cooling process of the air conditioning system, in automatic air supply mode, the air conditioning system determines the air supply speed and automatically adjusts the compressor operating frequency based on the indoor ambient temperature and the user's set temperature. Furthermore, the air supply speed setting is independently controlled with respect to the compressor operating frequency.

[0003] During the initial rapid cooling process, the air conditioning system judges the temperature difference between the indoor ambient temperature and the user's set temperature by the return air temperature. The indoor unit will quickly switch to a low fan speed setting. Due to this temperature difference, the compressor's operating frequency remains at a medium to high frequency. The low fan speed causes the evaporator temperature to drop rapidly, and the cold air sinks. The airflow of the indoor unit cannot effectively disturb the indoor air. However, at this time, the return air temperature detected by the indoor unit remains basically unchanged. This leads to a vicious cycle, resulting in users feeling too cold and causing complaints about excessive cold. Summary of the Invention

[0004] This application provides a refrigeration control method, controller, and air conditioning system for an air conditioning system, which can improve the comfort of the cooling and temperature-reaching process.

[0005] In a first aspect, embodiments of this application provide a cooling control method for an air conditioning system, comprising:

[0006] In response to receiving a cooling start command, the system detects the indoor ambient temperature and controls the compressor and indoor fan to operate based on the indoor ambient temperature and the set temperature.

[0007] In response to detecting that the difference between the indoor ambient temperature and the set temperature is less than a preset first temperature value, the target coil temperature is determined based on the rotation speed of the indoor fan, and the indoor coil temperature of the indoor unit is obtained. The operating frequency of the compressor is adjusted based on the indoor coil temperature and the target coil temperature.

[0008] In some embodiments, determining the target coil temperature based on the rotational speed of the indoor fan includes:

[0009] The current speed percentage is determined based on the current speed of the indoor fan and the preset maximum speed.

[0010] The target coil temperature is determined based on the current speed percentage and a preset temperature coefficient, wherein the preset temperature coefficient is a temperature constant used to limit the range of the target coil temperature, and the target coil temperature decreases as the current speed percentage increases.

[0011] In some embodiments, the preset maximum rotational speed percentage is 100%; determining the target coil temperature based on the current rotational speed percentage and a preset temperature coefficient includes:

[0012] Determine a first difference between the preset maximum speed percentage and the current speed percentage, and determine a second difference between a preset first coefficient and a preset temperature coefficient, wherein the first coefficient corresponds to the user's perceived temperature under the current operating conditions of the air conditioning system;

[0013] The target coil temperature is determined by multiplying the first difference and the second difference.

[0014] In some embodiments, determining the target coil temperature based on the product of the first difference and the second difference includes:

[0015] In response to detecting that the indoor fan is operating at a preset maximum speed, the target coil temperature is determined to be equal to the preset temperature coefficient.

[0016] In some embodiments, the step of determining the target coil temperature based on the rotational speed of the indoor fan in response to detecting that the difference between the indoor ambient temperature and the set temperature is less than a preset first temperature value includes:

[0017] The indoor ambient temperature is periodically detected, and a third difference between the indoor ambient temperature and the set temperature is determined.

[0018] In response to the duration for which the third difference is less than the preset first temperature value is greater than the first preset duration, the target coil temperature is determined based on the rotational speed of the indoor fan.

[0019] In some embodiments, after adjusting the operating frequency of the compressor based on the indoor coil temperature and the target coil temperature, the method further includes:

[0020] The indoor ambient temperature is periodically detected, and a fourth difference between the indoor ambient temperature and the set temperature is determined.

[0021] In response to the fact that the duration for which the fourth difference is greater than the preset second temperature value is greater than the second preset duration, the compressor and / or the indoor fan are controlled to operate according to the indoor ambient temperature and the set temperature.

[0022] In some embodiments, adjusting the operating frequency of the compressor based on the indoor coil temperature and the target coil temperature includes:

[0023] Determine the fifth difference between the indoor coil temperature and the target coil temperature;

[0024] The frequency adjustment value is determined based on the magnitude of the fifth difference, and the operating frequency of the compressor is adjusted accordingly.

[0025] In some embodiments, determining the frequency adjustment value based on the magnitude of the fifth difference and adjusting the operating frequency of the compressor based on the frequency includes at least one of the following:

[0026] If the fifth difference is greater than the reference upper limit value, a first frequency adjustment value is determined based on the difference between the fifth difference and the reference upper limit value, and the operating frequency of the compressor is increased based on the first frequency adjustment value;

[0027] If the fifth difference is less than the lower limit of the reference value, a second frequency adjustment value is determined based on the difference between the lower limit of the reference value and the fifth difference, and the operating frequency of the compressor is reduced based on the second frequency adjustment value.

[0028] In a second aspect, embodiments of this application provide a controller including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method as described in the first aspect embodiment.

[0029] Thirdly, embodiments of this application also provide an air conditioning system, including the controller of the second aspect embodiment.

[0030] The cooling control method, controller, and air conditioning system of the air conditioning system in this application embodiment have at least the following beneficial effects: In cooling mode, if the difference between the indoor ambient temperature and the set temperature is greater than a preset first temperature value, the compressor and indoor fan are controlled to operate according to the indoor ambient temperature and the set temperature, so that the indoor ambient temperature drops. If the difference between the indoor ambient temperature and the set temperature is less than the preset first temperature value, a control mode based on the indoor coil temperature is entered. The target coil temperature is determined according to the speed of the indoor fan, and then the operating frequency of the compressor is controlled according to the indoor coil temperature and the target coil temperature. In this mode, the corresponding target coil temperature can be matched according to different speeds, thereby adjusting the outlet air temperature. On the one hand, this can avoid the situation in the prior art where the indoor ambient temperature is close to the set temperature and the air volume is switched to a low setting, allowing the air field of the indoor unit to effectively disturb the indoor air. On the other hand, by controlling the outlet air temperature, the indoor ambient temperature detected by the air conditioning system is close to the user's perceived temperature, thereby reducing the operating frequency of the compressor and achieving a better energy-saving effect. It can dynamically find the balance point between the air conditioning capacity output and the room heat load, improving the user's comfort during use.

[0031] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0032] Figure 1 This is an overall flowchart of the refrigeration control method provided in the embodiments of this application;

[0033] Figure 2 This is a flowchart for determining the target coil temperature provided in an embodiment of this application;

[0034] Figure 3 This is a flowchart of determining the target coil temperature by rotational speed percentage provided in an embodiment of this application;

[0035] Figure 4 This is a flowchart illustrating the specific calculation of the target coil temperature provided in the embodiments of this application;

[0036] Figure 5 This is a flowchart provided in an embodiment of this application for determining whether to exit the T2 control mode;

[0037] Figure 6 This is a flowchart of the compressor operating frequency adjustment provided in the embodiments of this application;

[0038] Figure 7 This is an overall flowchart of the refrigeration control method provided in the example of this application;

[0039] Figure 8 This is a schematic diagram of the connection structure of the controller provided in the embodiment of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various implementations. Simultaneously, the steps or actions described in the method description can be rearranged or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0041] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0043] When automatic ventilation is activated for cooling, the airflow speed of the indoor fan and the operating frequency of the compressor are controlled independently. According to the existing cooling control logic, the air conditioning system determines the indoor ambient temperature based on the return air temperature. In the initial stage of cooling, the indoor ambient temperature differs significantly from the set temperature, resulting in a higher airflow speed and a higher compressor operating frequency for rapid cooling. When the indoor ambient temperature approaches the set temperature, the indoor fan speed decreases, but the compressor operating frequency remains at a medium-high frequency. This causes the evaporator temperature of the indoor unit to drop rapidly, leading to a rapid increase in condensate. Consequently, the airflow resistance of the indoor unit increases, further reducing the airflow volume. The cold air sinks, and the airflow field cannot effectively circulate the indoor air, causing the return air temperature detected by the indoor unit to remain essentially unchanged. This creates a vicious cycle, resulting in a temperature deviation of more than 4 degrees Celsius between the user's activity area and the detected temperature of the indoor unit. Coupled with the low outlet air temperature, the perceived temperature is even lower, leading to complaints of excessive cold.

[0044] Based on this, this application provides a cooling control method, controller, and air conditioning system for an air conditioning system. In cooling mode, if the difference between the indoor ambient temperature and the set temperature is greater than a preset first temperature value, the compressor and indoor fan are controlled to operate according to the indoor ambient temperature and the set temperature, causing the indoor ambient temperature to drop. If the difference between the indoor ambient temperature and the set temperature is less than the preset first temperature value, a control mode based on the indoor coil temperature is entered. The target coil temperature is determined according to the speed of the indoor fan, and then the operating frequency of the compressor is controlled according to the indoor coil temperature and the target coil temperature. In this mode, the corresponding target coil temperature can be matched according to different speeds, thereby adjusting the outlet air temperature. On the one hand, this avoids the situation in the prior art where the indoor ambient temperature approaches the set temperature and switches to a low air volume setting, allowing the airflow of the indoor unit to effectively disturb the indoor air. On the other hand, by controlling the outlet air temperature, the indoor ambient temperature detected by the air conditioning system is close to the user's perceived temperature, thereby reducing the operating frequency of the compressor and achieving better energy-saving effect. It can dynamically find the balance point between the air conditioning capacity output and the room heat load, improving the user's comfort during use.

[0045] The following description, with reference to the accompanying drawings, explains the refrigeration control method, controller, and air conditioning system of the air conditioning system:

[0046] Reference Figure 1 As shown, Figure 1 This is an overall flowchart of the refrigeration control method according to an embodiment of this application. The refrigeration control method includes, but is not limited to, the following steps:

[0047] Step S110: In response to receiving the cooling start command, detect the indoor ambient temperature, and control the compressor and indoor fan to operate according to the indoor ambient temperature and the set temperature;

[0048] In step S120, in response to detecting that the difference between the indoor ambient temperature and the set temperature is less than a preset first temperature value, the target coil temperature is determined according to the rotation speed of the indoor fan, and the indoor coil temperature of the indoor unit is obtained. The operating frequency of the compressor is adjusted according to the indoor coil temperature and the target coil temperature.

[0049] The cooling start command is sent by the user to the air conditioning system via remote control or smart terminal, or automatically triggered by the air conditioning system after reaching the set temperature or in a specific control mode when it detects a high indoor ambient temperature. The cooling start command activates the compressor and indoor fan. The indoor unit's heat exchanger absorbs heat from the indoor air, creating cool air around the heat exchanger, which is then blown out by the indoor fan, thus cooling the room. In some cases, the indoor fan speed is controlled by the cooling start command or the fan speed setting command. For example, the cooling start command may instruct the indoor fan's airflow speed to be variable, automatically adjusting to change the speed. Alternatively, the fan speed setting command may instruct the indoor fan's airflow speed to be fixed at the user-specified setting, in which case the airflow speed remains constant throughout the cooling process.

[0050] Step S110 above applies when the difference between the indoor ambient temperature and the set temperature is greater than a preset first temperature value. The compressor's operating frequency and the indoor fan's airflow speed are adjusted according to the indoor ambient temperature and the set temperature. Specifically, to achieve rapid indoor temperature reach, the compressor's operating frequency and the indoor fan's airflow speed are adjusted. Typically, the compressor's operating frequency is adjusted to a medium-high setting to minimize the indoor coil temperature, and the airflow speed is adjusted to a medium-high setting to quickly blow out cool air. When the difference between the indoor ambient temperature and the set temperature is less than the preset first temperature value, the air conditioning system enters a mode controlled based on the indoor coil temperature. The target coil temperature is determined according to the current speed of the indoor fan, and the compressor's operating frequency is adjusted based on the target coil temperature to change the indoor coil temperature, making the current indoor coil temperature close to the target coil temperature. In this mode, adjustments are no longer made based on the indoor ambient temperature and the set temperature. The airflow speed can remain at the speed setting before entering this mode, or it can be switched to automatic airflow or a fixed speed setting. The target coil temperature is determined based on the real-time airflow speed. The mode of control based on indoor coil temperature avoids judging the indoor ambient temperature by the return air temperature when the air volume is low. Instead, it determines the target coil temperature based on the current supply air velocity and adjusts the compressor's operating frequency based on the target coil temperature. Ultimately, this allows the outlet air temperature to be close to the user's set temperature, resulting in a better perceived temperature for the user.

[0051] The preset first temperature value can be set according to actual needs. For example, the preset first temperature value can be taken in the range of 0-4℃, which is used to realize the mode of control based on the indoor coil temperature before the indoor environment reaches the temperature.

[0052] Reference Figure 2As shown, the judgment condition for step S120 above, which determines to enter the mode controlled by indoor coil temperature, is that the difference between the indoor ambient temperature and the set temperature is less than a preset first temperature value. To ensure that the air conditioning system has not made a judgment error, this judgment condition can be further judged according to the following steps:

[0053] Step S210: Periodically detect the indoor ambient temperature and determine the third difference between the indoor ambient temperature and the set temperature;

[0054] In step S220, in response to the fact that the duration of the third difference being less than the preset first temperature value is greater than the first preset duration, the target coil temperature is determined based on the rotational speed of the indoor fan.

[0055] The air conditioning system periodically detects the indoor ambient temperature and records the corresponding detection time. Generally, the indoor ambient temperature is higher than the set temperature before reaching the target temperature. For each detected indoor ambient temperature, the set temperature is subtracted to obtain a third difference value and the corresponding detection time. It is determined whether multiple consecutive third differences obtained through subtraction are less than a preset first temperature value within a first preset time period. If so, it indicates that the indoor ambient temperature has decreased to a level close to the set temperature, at which point the system can enter a control mode based on the indoor coil temperature. The first preset time period can be set according to actual needs; for example, it can be set within the range of 3-10 minutes.

[0056] Reference Figure 3 As shown, in some embodiments, determining the target coil temperature based on the indoor fan speed in step S120 includes:

[0057] Step S310: Determine the current speed percentage based on the current speed of the indoor fan and the preset maximum speed;

[0058] Step S320: Determine the target coil temperature based on the current speed percentage and the preset temperature coefficient, wherein the preset temperature coefficient is a temperature constant used to limit the range of the target coil temperature, and the target coil temperature decreases as the current speed percentage increases.

[0059] Calculating the target coil temperature based on the current indoor fan speed can be done using different methods. Generally, when the indoor fan speed is high (high airflow setting), the target coil temperature should be low to ensure effective airflow disturbance of the indoor air. Conversely, when the indoor fan speed is low (low airflow setting), the target coil temperature should be high to avoid the vicious cycle of cold air sinking at low airflow settings. Specifically, the calculation can be based on a percentage of the current speed. The current speed percentage is determined by its proportion of the preset maximum speed. Then, the target coil temperature is determined based on this percentage and the corresponding preset temperature coefficient. The preset temperature coefficient defines the range of the target coil temperature. With a given preset temperature coefficient, the indoor fan speed range corresponds to the target coil temperature range, allowing adjustment of the target coil temperature range using the preset temperature coefficient. The preset temperature coefficient can be a factory preset value, or the air conditioning system can select a value within a preset temperature range (e.g., 5℃ to 10℃) based on the current user scenario. For example, the preset temperature coefficient value is related to the cooling capacity of the air conditioning system (the cooling capacity usually corresponds to the cooling area required by the user), or the preset temperature coefficient value is related to the current set temperature (there is a certain correlation between the set temperature and the coil temperature).

[0060] Reference Figure 4 As shown, in some embodiments, assuming the preset maximum speed percentage of the indoor fan is 100%, the step S320 above, which determines the target coil temperature based on the current speed percentage and the preset temperature coefficient, includes:

[0061] Step S410: Determine the first difference between the preset maximum speed percentage and the current speed percentage, and determine the second difference between the preset first coefficient and the preset temperature coefficient. The first coefficient corresponds to the user's perceived temperature under the current operating conditions of the air conditioning system.

[0062] Step S420: Determine the target coil temperature based on the product of the first difference and the second difference.

[0063] Subtracting the current rotational speed percentage from 100% yields the first difference. Subtracting the preset temperature coefficient from the preset first coefficient yields the second difference. Calculate the product of the first and second differences, and determine the target coil temperature based on the product. Specifically, it can be calculated using the following formula:

[0064] T2target=(100-JSX)*(15-T) / 100+T

[0065] Where T2target is the target coil temperature, JSX is the current speed percentage, T is the preset temperature coefficient, and the first coefficient is set to 15 in the above formula.

[0066] Therefore, if the current fan speed percentage is 100%, meaning the indoor fan is operating at the preset maximum speed, the target coil temperature T2target = T. If the current fan speed percentage is 1%, meaning the indoor fan is operating at the preset minimum speed, the target coil temperature T2target ≈ 15, which is the first coefficient. The first coefficient is set based on the lower limit of the comfortable temperature range perceived by the human body. The above formula reflects that the air conditioning system determines the target coil temperature T2target based on the current fan speed percentage JSX. When the fan speed is high, a lower target coil temperature is used to ensure that cold air is effectively blown out, improving the level of indoor air circulation. When the fan speed is low, a higher target coil temperature is used to reduce the sinking of cold air, which can prevent localized cold conditions. In some embodiments, the preset temperature coefficient T = 5℃, and the indoor fan is divided into 1-100 preset wind speeds. These wind speeds are also converted into 1-100 percentage speeds of the indoor fan. When the indoor fan is at the highest wind speed, JSX = 100, and the target coil temperature T2target = T = 5℃. When the indoor fan is at the lowest wind speed, JSX = 1, and the target coil temperature T2target ≈ 15℃. When the indoor fan is at a wind speed between the highest and lowest wind speeds, the target coil temperature T2target is between 5℃ and 15℃.

[0067] Reference Figure 5 As shown, in some embodiments, after adjusting the compressor's operating frequency based on the indoor coil temperature and the target coil temperature in step S120, the method further includes:

[0068] Step S510: Periodically detect the indoor ambient temperature and determine the fourth difference between the indoor ambient temperature and the set temperature;

[0069] In step S520, in response to the fact that the duration of the fourth difference being greater than the preset second temperature value is greater than the second preset duration, the compressor and / or indoor fan are controlled to operate according to the indoor ambient temperature and the set temperature.

[0070] During the process of adjusting the compressor's operating frequency according to the target coil temperature, the operating frequency may need to be adjusted multiple times before the indoor coil temperature reaches the target coil temperature. After each adjustment, the compressor's operating frequency needs to be maintained for a period of time, and it needs to be determined whether to stop the adjustment for the next cycle. Specifically, one adjustment of the compressor's operating frequency is considered as one cycle. In each cycle, the indoor ambient temperature is detected and the corresponding detection time is recorded. Each detected indoor ambient temperature is subtracted from the set temperature (the absolute value of the subtraction result can be taken to accommodate the case where the indoor ambient temperature is lower than the set temperature), resulting in a fourth difference value and the detection time corresponding to the fourth difference value. It is determined whether multiple consecutive fourth differences obtained by subtraction are all less than the preset second temperature value within a second preset time period. If so, it indicates that the indoor ambient temperature has reached the set temperature or is near the set temperature. At this time, cooling can be stopped or the control mode based on the indoor coil temperature can continue. Otherwise, it indicates that the indoor ambient temperature differs significantly from the set temperature. At this time, the control mode based on the indoor coil temperature is exited, and the mode of controlling the compressor and indoor fan operation according to the indoor ambient temperature and the set temperature is entered in step S110 to cool the room. The second preset duration can be set according to actual needs; for example, the second preset duration can be set within the range of 3-10 minutes. The preset second temperature value can also be set according to actual needs; for example, the preset second temperature value can be set within the range of 4-8℃.

[0071] Reference Figure 6 As shown, in some embodiments, adjusting the compressor's operating frequency based on the indoor coil temperature and the target coil temperature in step S120 includes:

[0072] Step S610: Determine the fifth difference between the indoor coil temperature and the target coil temperature;

[0073] Step S620: Determine the frequency adjustment value based on the magnitude of the fifth difference, and adjust the operating frequency of the compressor accordingly.

[0074] The compressor's operating frequency is adjusted according to the target coil temperature. First, the difference between the current indoor coil temperature and the target coil temperature is determined, i.e., the fifth difference. If the fifth difference is large, it indicates a significant difference between the current indoor coil temperature and the target coil temperature, requiring a larger adjustment rate or step size, thus necessitating a substantial adjustment of the compressor's operating frequency. If the fifth difference is small, it indicates a small difference between the current indoor coil temperature and the target coil temperature, requiring only a fine-tuning of the compressor's operating frequency. Specifically, in step S620 above, determining the frequency adjustment value based on the magnitude of the fifth difference, and adjusting the compressor's operating frequency accordingly, includes at least one of the following:

[0075] If the fifth difference is greater than the upper limit of the reference value, the first frequency adjustment value is determined based on the difference between the fifth difference and the upper limit of the reference value, and the operating frequency of the compressor is increased based on the first frequency adjustment value.

[0076] If the fifth difference is less than the lower limit of the reference value, the second frequency adjustment value is determined based on the difference between the lower limit of the reference value and the fifth difference, and the operating frequency of the compressor is reduced based on the second frequency adjustment value.

[0077] When the indoor coil temperature is close to the target coil temperature, the compressor's current operating frequency can be maintained without adjustment. However, when the indoor coil temperature differs significantly from the target coil temperature, the adjustment method needs to be determined based on the magnitude of the fifth difference value. The fifth difference value, obtained by subtracting the target coil temperature from the indoor coil temperature, can be positive or negative. If the fifth difference is positive and greater than the upper limit (which is positive), it indicates that the indoor coil temperature is significantly higher than the target coil temperature. In this case, the compressor's operating frequency should be increased to increase the cooling capacity; for example, by increasing the compressor's operating frequency according to the first frequency adjustment value. If the fifth difference is negative and less than the lower limit (which is negative), it indicates that the indoor coil temperature is significantly lower than the target coil temperature. In this case, the compressor's operating frequency should be decreased to reduce the cooling capacity; for example, by decreasing the compressor's operating frequency according to the second frequency adjustment value. The upper limit, lower limit, first frequency adjustment value, and second frequency adjustment value can all be set according to actual needs.

[0078] In summary, in cooling mode, if the difference between the indoor ambient temperature and the set temperature is greater than the preset first temperature value, the compressor and indoor fan are controlled according to the indoor ambient temperature and the set temperature to lower the indoor ambient temperature. If the difference between the indoor ambient temperature and the set temperature is less than the preset first temperature value, the system enters a mode based on the indoor coil temperature. The target coil temperature is determined based on the indoor fan speed, and the compressor's operating frequency is controlled based on the indoor coil temperature and the target coil temperature. This mode can match the corresponding target coil temperature according to different speeds, thereby adjusting the outlet air temperature. On the one hand, it avoids the situation in existing technologies where the airflow level drops when the indoor ambient temperature approaches the set temperature, allowing the indoor unit's airflow to effectively circulate the indoor air. On the other hand, by controlling the outlet air temperature, the indoor ambient temperature detected by the air conditioning system is close to the user's perceived temperature, which can reduce the compressor's operating frequency, achieving better energy-saving effects. It can dynamically find the balance point between the air conditioning capacity output and the room's heat load, improving user comfort during use.

[0079] The following is a detailed explanation of the refrigeration control method of this application through a specific example.

[0080] Reference Figure 7 As shown:

[0081] Step 1: In cooling mode, read the temperature detection value T1 from the indoor temperature sensor of the air conditioning system and determine the current set temperature Ts;

[0082] Step 2: Determine if T1-Ts < A and lasts for N minutes. If yes, proceed to Step 3. If not, continue cooling in the normal cooling mode and return to Step 1. Here, A is between 0 and 4, and N is between 3 and 10.

[0083] Step 3, enter the indoor coil temperature T2 control mode: calculate the target coil temperature T2target:

[0084] T2target=(100-JSX)*(15-T) / 100+T

[0085] Where JSX is the current speed percentage of the indoor fan, and T is the preset temperature coefficient;

[0086] Adjust the compressor's operating frequency according to the target coil temperature T2target and the indoor coil temperature T2;

[0087] Step 4: Continuously compare T1 and Ts to determine whether T1-Ts>B and lasts for N minutes. If it is satisfied, exit T2 control mode, perform cooling in the normal cooling mode and return to step 1. If it is not satisfied, continue to execute T2 control mode. B takes a value between 4 and 8, and N takes a value between 3 and 10.

[0088] Embodiments of this application also provide a controller, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the cooling control method as described above.

[0089] Embodiments of this application also provide an air conditioning system, including the controller described in the above embodiments.

[0090] like Figure 8 As shown, Figure 8 This is a schematic diagram of a controller 1000 provided in one embodiment of this application.

[0091] The controller 1000 in this embodiment includes one or more processors 1001 and a memory 1002. Figure 8 The example uses a processor 1001 and a memory 1002.

[0092] Processor 1001 and memory 1002 can be connected via a bus or other means. Figure 8 Taking the example of a connection between China and Israel via a bus.

[0093] Memory 1002, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 1002 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 1002 may optionally include memory 1002 remotely located relative to processor 1001, and these remote memories can be connected to controller 1000 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0094] Those skilled in the art will understand that Figure 8 The device structure shown does not constitute a limitation on the controller 1000 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0095] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0096] The non-transient software program and instructions required to implement the cooling control method of the above embodiments are stored in memory and executed by the processor, thus executing the above embodiments.

[0097] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network nodes. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0098] Furthermore, one embodiment of this application provides a computer-readable storage medium storing computer-executable instructions that are executed by a processor or controller 1000.

[0099] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0100] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0101] In the several embodiments provided in this application, it should be understood that the disclosed systems, instruments, and methods can be implemented in other ways. For example, the instrument embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between instruments or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0102] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0103] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A refrigeration control method for an air conditioning system, characterized in that, include: In response to receiving a cooling start command, the system detects the indoor ambient temperature and controls the compressor and indoor fan to operate based on the indoor ambient temperature and the set temperature. In response to detecting that the difference between the indoor ambient temperature and the set temperature is less than a preset first temperature value, the target coil temperature is determined based on the rotation speed of the indoor fan, and the indoor coil temperature of the indoor unit is obtained. The operating frequency of the compressor is adjusted based on the indoor coil temperature and the target coil temperature.

2. The method according to claim 1, characterized in that, The step of determining the target coil temperature based on the indoor fan speed includes: The current speed percentage is determined based on the current speed of the indoor fan and the preset maximum speed. The target coil temperature is determined based on the current speed percentage and a preset temperature coefficient, wherein the preset temperature coefficient is a temperature constant used to limit the range of the target coil temperature, and the target coil temperature decreases as the current speed percentage increases.

3. The method according to claim 2, characterized in that, The preset maximum rotational speed percentage is 100%; the determination of the target coil temperature based on the current rotational speed percentage and the preset temperature coefficient includes: Determine a first difference between the preset maximum speed percentage and the current speed percentage, and determine a second difference between a preset first coefficient and a preset temperature coefficient, wherein the first coefficient corresponds to the user's perceived temperature under the current operating conditions of the air conditioning system; The target coil temperature is determined by multiplying the first difference and the second difference.

4. The method according to claim 3, characterized in that, Determining the target coil temperature based on the product of the first difference and the second difference includes: In response to detecting that the indoor fan is operating at a preset maximum speed, the target coil temperature is determined to be equal to the preset temperature coefficient.

5. The method according to claim 1, characterized in that, The step of determining the target coil temperature based on the indoor fan speed in response to detecting that the difference between the indoor ambient temperature and the set temperature is less than a preset first temperature value includes: The indoor ambient temperature is periodically detected, and a third difference between the indoor ambient temperature and the set temperature is determined. In response to the duration for which the third difference is less than the preset first temperature value is greater than the first preset duration, the target coil temperature is determined based on the rotational speed of the indoor fan.

6. The method according to claim 1, characterized in that, After adjusting the compressor's operating frequency based on the indoor coil temperature and the target coil temperature, the method further includes: The indoor ambient temperature is periodically detected, and a fourth difference between the indoor ambient temperature and the set temperature is determined. In response to the fact that the duration for which the fourth difference is greater than the preset second temperature value is greater than the second preset duration, the compressor and / or the indoor fan are controlled to operate according to the indoor ambient temperature and the set temperature.

7. The method according to claim 1, characterized in that, The step of adjusting the compressor's operating frequency based on the indoor coil temperature and the target coil temperature includes: Determine the fifth difference between the indoor coil temperature and the target coil temperature; The frequency adjustment value is determined based on the magnitude of the fifth difference, and the operating frequency of the compressor is adjusted accordingly.

8. The method according to claim 7, characterized in that, Determining the frequency adjustment value based on the magnitude of the fifth difference, and adjusting the operating frequency of the compressor based on the frequency, includes at least one of the following: If the fifth difference is greater than the reference upper limit value, a first frequency adjustment value is determined based on the difference between the fifth difference and the reference upper limit value, and the operating frequency of the compressor is increased based on the first frequency adjustment value; If the fifth difference is less than the lower limit of the reference value, a second frequency adjustment value is determined based on the difference between the lower limit of the reference value and the fifth difference, and the operating frequency of the compressor is reduced based on the second frequency adjustment value.

9. A controller, characterized in that, It includes at least one processor and a memory for communicatively connecting with said at least one processor; The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method as described in any one of claims 1 to 8.

10. An air conditioning system, characterized in that, Includes the controller as described in claim 9.

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