Control method and device of outdoor unit and air conditioner

Abstract

The present invention provides a control method, device, and air conditioner for an outdoor unit. The method comprises: obtaining air conditioner operation information; when determining that the operating mode is cooling mode, obtaining a first coil temperature and a first air outlet temperature; when determining that the first coil temperature is less than the first air outlet temperature, determining a first target coil temperature based on the first coil temperature and the first air outlet temperature; and controlling the outdoor unit to increase the frequency until the coil temperature reaches the first target coil temperature. The control method, device, and air conditioner for an outdoor unit provided by the present invention perform a comparative analysis based on the first coil temperature and the first air outlet temperature in cooling mode. When deciding to increase the cooling capacity, the first target coil temperature is calculated to control the outdoor unit to dynamically adjust the operating frequency. This achieves the goal of reflecting the average performance of each branch effect of the indoor unit based on the coil temperature and the air outlet temperature, better reflecting the actual cooling state, providing an accurate basis for subsequent intelligent cooling adjustment, and improving cooling performance.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning equipment, and in particular to a control method and device for an outdoor unit and an air conditioner. Background Art

[0002] Air conditioners are widely used as intelligent devices for regulating indoor temperature and humidity. When cooling or heating, if the operating frequency is too high, the indoor unit's evaporator temperature will overheat, causing the frequency to stop increasing to prevent excessive load. If the operating frequency is too low, the cooling / heating effect may be ineffective.

[0003] In the existing technology, the evaporator load status is generally reflected by the internal coil temperature. However, the internal coil temperature is only the temperature status of one of the evaporators in the air conditioner's internal branch. However, there are relatively many branch routes in the indoor unit, and the actual situation is relatively complicated. The temperature status of one evaporator may not reflect the overall status of the indoor unit, which greatly affects the operation of the cooling / heating mode. Summary of the Invention

[0004] The present invention provides a control method and device for an outdoor unit and an air conditioner, which are used to solve the defect in the prior art that the operating state of the indoor unit cannot be determined, resulting in unstable cooling / heating effects.

[0005] The present invention provides a control method for an outdoor unit, comprising:

[0006] Get air conditioning operation information;

[0007] When the operating mode is determined to be the cooling mode, obtaining a first coil temperature and a first air outlet temperature;

[0008] If it is determined that the first coil temperature is less than the first outlet air temperature, determining a first target coil temperature based on the first coil temperature and the first outlet air temperature;

[0009] controlling the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature;

[0010] Wherein, the working mode is determined based on the air-conditioning operation information.

[0011] According to a control method for an outdoor unit provided by the present invention, when it is determined that the first coil temperature is less than the first outlet air temperature, determining a first target coil temperature based on the first coil temperature and the first outlet air temperature includes:

[0012] determining a first temperature difference based on the first coil temperature and the first outlet air temperature;

[0013] determining a second temperature difference based on the current room temperature and the first target room temperature;

[0014] determining the first target coil temperature based on the first coil temperature, the first temperature difference, and the second temperature difference;

[0015] The first target room temperature is the optimal cooling temperature in the cooling mode.

[0016] According to a control method for an outdoor unit provided by the present invention, after acquiring the air-conditioning operation information, the method further includes:

[0017] When it is determined that the operating mode is the heating mode, obtaining the second coil temperature and the second air outlet temperature;

[0018] If it is determined that the second coil temperature is greater than the second outlet air temperature, determining a second target coil temperature based on the second coil temperature and the second outlet air temperature;

[0019] Controlling the outdoor unit to reduce frequency until the coil temperature drops to the second target coil temperature;

[0020] Wherein, the working mode is determined based on the air-conditioning operation information.

[0021] According to a control method for an outdoor unit provided by the present invention, when it is determined that the second coil temperature is greater than the second air outlet temperature, determining a second target coil temperature based on the second coil temperature and the second air outlet temperature includes:

[0022] determining a third temperature difference based on the second coil temperature and the second outlet air temperature;

[0023] determining a fourth temperature difference based on the current room temperature and the second target room temperature;

[0024] determining the second target coil temperature based on the second coil temperature, the third temperature difference, and the fourth temperature difference;

[0025] The second target room temperature is the optimal heating temperature in the heating mode.

[0026] According to a control method for an outdoor unit provided by the present invention, after determining the first target coil temperature, the method further includes:

[0027] determining a target operating frequency based on the first target coil temperature;

[0028] Based on the target operating frequency, the outdoor unit boost frequency is controlled.

[0029] According to a control method for an outdoor unit provided by the present invention, after determining the first target coil temperature, the method further includes:

[0030] determining a target opening degree based on the first target coil temperature;

[0031] When it is determined that the target opening is less than or equal to the rated minimum opening, controlling the electronic expansion valve of the outdoor unit to operate at the rated minimum opening;

[0032] When it is determined that the coil temperature at the minimum opening is lower than the first target coil temperature, the outdoor unit is controlled to increase the frequency until the coil temperature rises to the first target coil temperature.

[0033] The present invention also provides a control device for an outdoor unit, comprising:

[0034] Operation information acquisition module, used to obtain air conditioner operation information;

[0035] A first temperature monitoring module is configured to obtain a first coil temperature and a first air outlet temperature when the operating mode is determined to be a cooling mode;

[0036] a coil temperature compensation module, configured to determine a first target coil temperature based on the first coil temperature and the first outlet air temperature when it is determined that the first coil temperature is less than the first outlet air temperature;

[0037] a first control module, configured to control the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature;

[0038] Wherein, the working mode is determined based on the air-conditioning operation information.

[0039] The present invention also provides an air conditioner, comprising an indoor unit and an outdoor unit, wherein the indoor unit is provided with a control processor, a first sensor module, and a second sensor module, wherein the first sensor module is provided inside a coil of the indoor unit; and the second sensor module is provided at an air outlet of the indoor unit. The air conditioner also includes a memory and a program or instruction stored in the memory and executable on the control processor, wherein the program or instruction, when executed by the control processor, executes any of the above-described control methods for the outdoor unit.

[0040] The first sensor module is used to collect the coil temperature after the air conditioner starts working; the second sensor module is used to collect the outlet air temperature after the air conditioner starts working.

[0041] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the control method of the outdoor unit as described above is implemented.

[0042] The present invention further provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned control methods for an outdoor unit.

[0043] The control method, device and air conditioner of the outdoor unit provided by the present invention perform comparative analysis based on the first coil temperature and the first air outlet temperature in the cooling mode. When deciding to increase the cooling capacity, the first target coil temperature is calculated to control the outdoor unit to dynamically adjust the operating frequency, thereby realizing the average performance of each branch effect of the indoor unit reflected according to the coil temperature and the air outlet temperature, and better reflecting the actual cooling state, providing an accurate basis for subsequent intelligent cooling adjustment, and improving the cooling performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 It is a flow chart of the control method of the outdoor unit provided by the present invention;

[0046] Figure 2 It is a structural schematic diagram of the control device of the outdoor unit provided by the present invention;

[0047] Figure 3 It is a structural schematic diagram of the air conditioner provided by the present invention. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0049] The terms "first," "second," and the like in this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, the objects distinguished by "first," "second," and the like generally refer to a class of objects and do not limit the number of objects. For example, the first object may be one or more.

[0050] It should be understood that the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present invention, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0051] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0052] Figure 1 FIG. 1 is a flow chart of the control method of the outdoor unit provided by the present invention. Figure 1 As shown, the control method of the outdoor unit provided by the embodiment of the present invention includes: step 101, obtaining air-conditioning operation information.

[0053] It should be noted that the execution subject of the control method of the outdoor unit provided in the embodiment of the present invention is the control device of the outdoor unit.

[0054] The application scenario of the control method of the outdoor unit provided by the embodiment of the present invention is that after the user activates the working mode of the air conditioner, the coil temperature and the outlet temperature are simultaneously monitored by the sensor module, and the operating frequency of the outdoor unit is adaptively adjusted so that the actual load state under the working mode is close to the designed ideal value.

[0055] It should be noted that, before step 101, the user needs to send an activation instruction via a transmission medium to activate the working mode of the air conditioner and operate it at the default fan speed and operating frequency in the working mode.

[0056] Optionally, the user may transmit an activation instruction through the control device by wireless communication between the control device and the air-conditioning system, so that the air-conditioning system initializes the corresponding working mode.

[0057] Optionally, the user may issue an activation instruction through voice interaction, and the air-conditioning system receives the activation instruction and initializes the working mode of the air-conditioning after performing voice recognition.

[0058] Specifically, in step 101, after the air conditioner is started, the control device of the outdoor unit receives the operating information fed back by each component according to the activation instruction, and compiles the air conditioner operating information to represent the operating status of the air conditioner in a certain working mode.

[0059] Step 102: When it is determined that the operating mode is the cooling mode, obtain a first coil temperature and a first air outlet temperature.

[0060] The working mode is determined based on the air conditioner operation information.

[0061] Specifically, in step 102, the control device of the outdoor unit reversely analyzes the air-conditioning operation information obtained in step 101 to determine the activated working mode.

[0062] If it is determined that its working mode is cooling mode, within the same collection cycle, the control device of the outdoor unit receives the first coil temperature collected by the sensor module set at the coil, and simultaneously receives the first outlet air temperature collected by the sensor module set at the air outlet.

[0063] The first coil temperature is used to represent the actual operating state of the evaporator of the outdoor unit at the default operating frequency of the cooling mode.

[0064] The first air outlet temperature is used to represent the cold air temperature generated by the evaporator in actual operation.

[0065] The embodiment of the present invention does not specifically limit the working cycle of the sensor modules provided at the coil and the air outlet.

[0066] Optionally, the two sensor modules can perform data collection operations at a default working cycle. After receiving the sensor information periodically collected by the two sensor modules, the control device of the outdoor unit searches and interpolates the above data to obtain the first coil temperature and the first air outlet temperature at the same collection time.

[0067] Optionally, the user can issue a cycle change instruction, and the sensor module receives and responds to the instruction, changing the working cycle to the cycle indicated by the instruction to perform the collection operation, so that the sensor modules at two locations simultaneously collect the first coil temperature and the first outlet air temperature at the same collection time interval.

[0068] Step 103: When it is determined that the first coil temperature is lower than the first outlet air temperature, a first target coil temperature is determined based on the first coil temperature and the first outlet air temperature.

[0069] Specifically, in step 103, the control device of the outdoor unit compares the first coil temperature and the first air outlet temperature.

[0070] If the first coil temperature is lower than the first outlet air temperature, this indicates that the outdoor unit, operating at the default frequency in cooling mode, is generating insufficient cooling capacity. This results in a lower first coil temperature during heat exchange at the evaporator, resulting in a relatively high output air temperature and insufficient rapid cooling of the indoor air. Therefore, the coil temperature needs to be increased. A conversion is performed based on the first coil temperature and the first outlet air temperature to obtain the first target coil temperature.

[0071] The first target coil temperature refers to a target value obtained by compensating the coil temperature when the actual cooling capacity reaches the ideal cooling capacity requirement of the cooling mode.

[0072] If the first coil temperature is greater than or equal to the first outlet air temperature, it means that the outdoor unit, operating at the default frequency in cooling mode, is generating sufficient cooling capacity to quickly cool the room. Therefore, there is no need to compensate for the coil temperature.

[0073] Step 104 : Control the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature.

[0074] Specifically, in step 104 , the control device of the outdoor unit packages the converted first target coil temperature into a frequency increase instruction and distributes it to the outdoor unit.

[0075] The outdoor unit receives and responds to the frequency increase command, controlling its internal compressor to increase its operating frequency, thereby raising the indoor unit's coil temperature accordingly. When the coil temperature reaches a first target coil temperature, a sensor module located at the coil sends a signal to the outdoor unit, indicating that the target coil temperature has been reached and that the frequency increase can be stopped.

[0076] Among them, the higher the operating frequency, the higher the coil temperature and the greater the cooling capacity, so that the cooling temperature decreases accordingly, achieving the purpose of rapid cooling and temperature reduction.

[0077] The embodiment of the present invention performs a comparative analysis based on the first coil temperature and the first outlet air temperature in the cooling mode. When deciding to increase the cooling capacity, the first target coil temperature is calculated to control the outdoor unit to dynamically adjust the operating frequency. This achieves the average performance of each branch effect of the indoor unit reflected by the coil temperature and the outlet air temperature, and can better reflect the actual cooling state, providing an accurate basis for subsequent intelligent cooling adjustment, thereby improving cooling performance.

[0078] Based on any of the above embodiments, when it is determined that the first coil temperature is less than the first outlet air temperature, determining the first target coil temperature based on the first coil temperature and the first outlet air temperature includes: determining a first temperature difference based on the first coil temperature and the first outlet air temperature.

[0079] Specifically, in step 103, the control device of the outdoor unit uses the first outlet air temperature and the first coil temperature to perform a difference to obtain a first temperature difference.

[0080] Based on the current room temperature and the first target room temperature, a second temperature difference is determined.

[0081] The first target room temperature is the optimal cooling temperature in the cooling mode.

[0082] It should be noted that the first target room temperature refers to the optimal cooling temperature in the cooling mode.

[0083] The embodiment of the present invention does not specifically limit the value of the first target room temperature.

[0084] Exemplarily, the first target room temperature may be an optimal refrigeration temperature specified in the industry, for example, 26°C.

[0085] For example, the first target room temperature may be a cooling temperature set by the user in an activation instruction for starting the cooling mode.

[0086] Specifically, since the current first air outlet temperature is slightly higher than the first coil temperature, indicating that the current indoor temperature has not yet dropped to the first target room temperature, the control device of the outdoor unit uses the difference between the current room temperature and the first target room temperature to obtain the second temperature difference.

[0087] A first target coil temperature is determined based on the first coil temperature, the first temperature difference, and the second temperature difference.

[0088] Specifically, the control device of the outdoor unit substitutes the first coil temperature, the first temperature difference, and the second temperature difference into a mathematical model to calculate a first target coil temperature.

[0089] The embodiment of the present invention does not specifically limit the calculation process of the first target coil temperature.

[0090] For example, the calculation formula for the first target coil temperature may be:

[0091]

[0092] D1=Tw1-Tp1

[0093] D2=T-T1

[0094] in, is the first target coil temperature, and Tp1 is the first coil temperature.

[0095] D1 is the first temperature difference, which is the difference between the first outlet air temperature Tw1 and the first coil temperature Tp1.

[0096] D2 is the second temperature difference, which is the difference between the current room temperature T and the first target room temperature T1.

[0097] Both k1 and k2 are weight parameters, their value range is between 0 and 1, and the sum of k1 and k2 is 1.

[0098] The embodiment of the present invention does not specifically limit the values ​​of k1 and k2. For example, since the operating frequency has a greater impact on the coil temperature, k1 is set to 0.9 and k2 is set to 0.1.

[0099] When deciding to increase the cooling capacity, the embodiment of the present invention uses a first difference to reflect the sensible heat compensation amount of the evaporator when the indoor unit is running, and uses a second difference to reflect the latent heat compensation amount of the evaporator in the indoor environment. Then, based on the first coil temperature, a first target coil temperature is converted to control the outdoor unit to dynamically adjust the operating frequency. This achieves the average performance of each branch effect of the indoor unit reflected according to the coil temperature and the air outlet temperature, and can better reflect the actual cooling state, providing an accurate basis for subsequent intelligent cooling adjustment, thereby improving cooling performance.

[0100] Based on any of the above embodiments, after obtaining the air-conditioning operation information, the method further includes: when it is determined that the operating mode is the heating mode, obtaining a second coil temperature and a second air outlet temperature.

[0101] The working mode is determined based on the air conditioner operation information.

[0102] Specifically, after step 101 , the control device of the outdoor unit reversely analyzes the air-conditioning operation information acquired in step 101 to determine the activated working mode.

[0103] If it is determined that its working mode is heating mode, within the same collection cycle, the control device of the outdoor unit receives the second coil temperature collected by the sensor module set at the coil, and simultaneously receives the second outlet air temperature collected by the sensor module set at the air outlet.

[0104] The second coil temperature is used to represent the actual operating state of the evaporator when the outdoor unit is operating at the default operating frequency of the heating mode.

[0105] The second air outlet temperature is used to represent the hot air temperature generated by the evaporator in actual operation.

[0106] If it is determined that the second coil temperature is greater than the second outlet air temperature, a second target coil temperature is determined based on the second coil temperature and the second outlet air temperature.

[0107] Specifically, the control device of the outdoor unit compares the second coil temperature and the second air outlet temperature.

[0108] If the second coil temperature is greater than the second outlet air temperature, this indicates that the outdoor unit, operating at the default frequency for heating mode, is generating excessive heating, causing evaporator overload and a high second coil temperature. This results in a relatively high output hot air temperature, and the indoor heating requirement has been met. Therefore, the coil temperature needs to be lowered. The second coil temperature and the second outlet air temperature are converted to the second target coil temperature.

[0109] The second target coil temperature refers to a target value obtained by lowering the coil temperature when the actual heating capacity has already reached the ideal heating capacity requirement of the heating mode.

[0110] If the second coil temperature is less than or equal to the second outlet air temperature, it means that the outdoor unit, operating at the default frequency in heating mode, is not generating enough heat to raise the indoor temperature to the target temperature, or is just reaching the target temperature. Therefore, there is no need to lower the coil temperature.

[0111] The outdoor unit is controlled to reduce frequency until the coil temperature drops to the second target coil temperature.

[0112] Specifically, the control device of the outdoor unit encapsulates the converted second target coil temperature into a frequency reduction instruction and distributes it to the outdoor unit.

[0113] The outdoor unit receives and responds to the frequency reduction command, controlling its internal compressor to reduce its operating frequency, thereby lowering the indoor unit's coil temperature accordingly. When the coil temperature drops to the second target coil temperature, a sensor module located at the coil sends a signal to the outdoor unit, indicating that the target coil temperature has been reached and that further frequency reduction can be stopped.

[0114] Among them, the lower the operating frequency, the lower the coil temperature and the less heating capacity, so that the heating temperature is reduced accordingly, so that the heating effect is weakened when the current heating effect meets the heating demand.

[0115] The embodiment of the present invention performs a comparative analysis based on the second coil temperature and the second outlet air temperature in the heating mode. When deciding to reduce the heating amount, the second target coil temperature is calculated to control the outdoor unit to dynamically adjust the operating frequency. This achieves the average performance of each branch effect of the indoor unit reflected by the coil temperature and the outlet air temperature, and can better reflect the actual heating status, providing an accurate basis for subsequent intelligent heating adjustment, improving cooling performance, and avoiding energy waste.

[0116] Based on any of the above embodiments, when it is determined that the second coil temperature is greater than the second outlet air temperature, determining the second target coil temperature based on the second coil temperature and the second outlet air temperature includes: determining a third temperature difference based on the second coil temperature and the second outlet air temperature.

[0117] Specifically, the control device of the outdoor unit obtains a third temperature difference by subtracting the second coil temperature from the second air outlet temperature.

[0118] Based on the current room temperature and the second target room temperature, a fourth temperature difference is determined.

[0119] The second target room temperature is the optimal heating temperature in the heating mode.

[0120] It should be noted that the second target room temperature refers to the optimal heating temperature in the heating mode.

[0121] The embodiment of the present invention does not specifically limit the value of the second target room temperature.

[0122] For example, the second target room temperature may be an optimal heating temperature specified in the industry, for example, 26°C.

[0123] For example, the second target room temperature may be a heating temperature set by the user in an activation instruction for starting the heating mode.

[0124] Specifically, since the current second coil temperature is slightly higher than the second air outlet temperature, it means that the current indoor temperature has already risen to the second target room temperature. The control device of the outdoor unit then obtains the fourth temperature difference by subtracting the second target room temperature from the current room temperature.

[0125] A second target coil temperature is determined based on the second coil temperature, the third temperature difference, and the fourth temperature difference.

[0126] Specifically, the control device of the outdoor unit substitutes the second coil temperature, the third temperature difference, and the fourth temperature difference into a mathematical model to calculate the second target coil temperature.

[0127] The embodiment of the present invention does not specifically limit the calculation process of the second target coil temperature.

[0128] For example, the calculation formula for the second target coil temperature may be:

[0129]

[0130] D3=Tp2-Tw2

[0131] D4=T2-T

[0132] in, is the second target coil temperature, and Tp2 is the second coil temperature.

[0133] D3 is the third temperature difference, which is the difference between the second coil temperature Tp2 and the second outlet air temperature Tw2.

[0134] D4 is a fourth temperature difference, which is the difference between the second target room temperature T2 and the current room temperature T.

[0135] Both k3 and k4 are weight parameters, and their value range is between 0 and 1, and the sum of k3 and k4 is 1.

[0136] The embodiment of the present invention does not specifically limit the values ​​of k3 and k4. For example, since the operating frequency has a greater impact on the coil temperature, k3 can be set to 0.9, the same as k1, and k4 can be set to 0.1, the same as k2.

[0137] When deciding to reduce the heating amount, the embodiment of the present invention uses the third difference to reflect the reduction in sensible heat of the evaporator when the indoor unit is running, and uses the fourth difference to reflect the reduction in latent heat of the evaporator in the indoor environment. Then, based on the second coil temperature, the second target coil temperature is converted to control the outdoor unit to dynamically adjust the operating frequency. This achieves the average performance of each branch effect of the indoor unit reflected according to the coil temperature and the air outlet temperature, and can better reflect the actual heating status, providing a precise basis for subsequent intelligent heating adjustment, improving heating performance, and avoiding energy waste.

[0138] Based on any of the above embodiments, after determining the first target coil temperature, the method further includes: determining a target operating frequency based on the first target coil temperature.

[0139] Specifically, after step 103, the control device of the outdoor unit determines a target operating frequency corresponding to the first target coil temperature according to a preset correspondence between the coil temperature and the operating frequency.

[0140] Based on the target operating frequency, control the outdoor unit to increase the frequency.

[0141] Specifically, the control device of the outdoor unit encapsulates the target operating frequency into a frequency increase instruction and distributes the instruction to the outdoor unit.

[0142] The outdoor unit receives and responds to the frequency increase instruction. If the target operating frequency is lower than the rated maximum operating frequency of the outdoor unit, the outdoor unit controls the compressor inside the outdoor unit to increase the operating frequency to the target operating frequency.

[0143] If the target operating frequency is greater than or equal to the rated maximum operating frequency of the outdoor unit, the compressor inside it is controlled to operate at the maximum operating frequency.

[0144] It can be understood that the control device of the outdoor unit determines the target operating frequency corresponding to the second target coil temperature based on the preset correspondence between the coil temperature and the operating frequency, and sends a frequency reduction instruction to the outdoor unit based on the target operating frequency corresponding to the second target coil temperature.

[0145] The outdoor unit receives and responds to the frequency reduction instruction. If the target operating frequency corresponding to the second target coil temperature is less than the rated minimum operating frequency of the outdoor unit, the outdoor unit is controlled to stop operating.

[0146] If the target operating frequency corresponding to the second target coil temperature is greater than or equal to the rated minimum operating frequency of the outdoor unit, the compressor inside the outdoor unit is controlled to reduce the operating frequency to the target operating frequency.

[0147] After converting the first target coil temperature, the embodiment of the present invention determines the corresponding target operating frequency through a preset correspondence to control the outdoor unit to dynamically adjust the operating frequency. This achieves the average performance of each branch effect of the indoor unit reflected according to the coil temperature and the air outlet temperature, quantitatively adjusts the operating frequency, and improves the control accuracy of the outdoor unit.

[0148] Based on any of the above embodiments, after determining the first target coil temperature, the method further includes: determining a target opening degree based on the first target coil temperature.

[0149] Specifically, after step 103 , the control device of the outdoor unit determines a target opening corresponding to the first target coil temperature according to a preset correspondence between the coil temperature and the valve opening.

[0150] When it is determined that the target opening is less than or equal to the rated minimum opening, the electronic expansion valve of the outdoor unit is controlled to operate at the rated minimum opening.

[0151] Specifically, the control device of the outdoor unit encapsulates the target opening degree into a throttling instruction and distributes the instruction to the outdoor unit.

[0152] The outdoor unit receives and responds to the throttling command. If the target operating frequency is less than the rated minimum opening of the electronic expansion valve, the electronic expansion valve inside it is controlled to reduce the opening to the minimum opening to increase the cooling capacity and raise the coil temperature.

[0153] If the target operating frequency is greater than or equal to the rated minimum opening of the electronic expansion valve, the electronic expansion valve inside it will be controlled to reduce the opening to the target opening to increase the cooling capacity and increase the coil temperature.

[0154] When it is determined that the coil temperature at the minimum opening is less than the first target coil temperature, the outdoor unit is controlled to increase the frequency until the coil temperature rises to the first target coil temperature.

[0155] Specifically, after adjusting the opening, the coil temperature is collected again.

[0156] If the adjusted opening value is the minimum opening value and the coil temperature at this time is still lower than the first target coil temperature, the outdoor unit needs to be controlled to increase the operating frequency and continue to increase the coil temperature until the coil temperature reaches the first target coil temperature, and then stop increasing the frequency.

[0157] If the adjusted opening value is the minimum opening value and the coil temperature at this time is greater than or equal to the first target coil temperature, there is no need to control the outdoor unit to increase the operating frequency.

[0158] If the adjusted opening value is greater than the minimum opening and the coil temperature at this time is still lower than the first target coil temperature, the electronic expansion valve is continued to be controlled to reduce the opening.

[0159] It can be understood that the control device of the outdoor unit determines the target opening corresponding to the second target coil temperature based on the preset correspondence between the coil temperature and the valve opening, and sends an opening instruction to the outdoor unit based on the target opening corresponding to the second target coil temperature.

[0160] The outdoor unit receives and responds to the opening instruction, and controls the electronic expansion valve to operate at the maximum opening if the target opening corresponding to the second target coil temperature is greater than or equal to the rated maximum opening of the electronic expansion valve.

[0161] If the coil temperature at the maximum opening is still higher than the second target coil temperature, the outdoor unit is controlled to reduce the operating frequency, further reducing the coil temperature to the second target coil temperature.

[0162] If the target opening corresponding to the second target coil temperature is less than the rated maximum opening of the electronic expansion valve, the electronic expansion valve is controlled to continue to increase its opening.

[0163] After converting the first target coil temperature, the embodiment of the present invention determines the corresponding target opening through a preset correspondence. After the target opening reaches the rated minimum opening, the outdoor unit is controlled to increase the frequency. This achieves the average performance of each branch effect of the indoor unit reflected by the coil temperature and the outlet air temperature, quantitatively adjusts the operating frequency, first relies on throttling by the electronic expansion valve, and then uses the outdoor unit to adjust the frequency, thereby improving the stability of system operation.

[0164] Figure 2 FIG. 1 is a schematic diagram of the structure of the control device of the outdoor unit provided by the present invention. Figure 2 As shown, the self-cleaning control device of the air conditioner provided by the embodiment of the present invention includes: an operation information acquisition module 210, a temperature monitoring module 220, a coil temperature compensation module 230 and a first control module 240, wherein:

[0165] The operation information acquisition module 210 is used to acquire the air conditioner operation information.

[0166] The temperature monitoring module 220 is configured to obtain a first coil temperature and a first air outlet temperature when the operating mode is determined to be the cooling mode.

[0167] The coil temperature compensation module 230 is configured to determine a first target coil temperature based on the first coil temperature and the first outlet air temperature when it is determined that the first coil temperature is lower than the first outlet air temperature.

[0168] The first control module 240 is configured to control the outdoor unit to increase the frequency until the coil temperature reaches a first target coil temperature.

[0169] The working mode is determined based on the air conditioner operation information.

[0170] Specifically, the operation information acquisition module 210 , the first temperature monitoring module 220 , the coil temperature compensation module 230 and the first control module 240 are electrically connected in sequence.

[0171] After the air conditioner is started, the operation information acquisition module 210 receives the operation information fed back by each component according to the activation instruction, and compiles it into air conditioner operation information to represent the operation status of the air conditioner in a certain working mode.

[0172] The first temperature monitoring module 220 reversely analyzes the air-conditioning operation information to determine the activated operation mode.

[0173] If it is determined that its working mode is cooling mode, within the same collection cycle, the control device of the outdoor unit receives the first coil temperature collected by the sensor module set at the coil, and simultaneously receives the first outlet air temperature collected by the sensor module set at the air outlet.

[0174] The coil temperature compensation module 230 compares the first coil temperature with the first outlet air temperature.

[0175] If the first coil temperature is lower than the first outlet air temperature, this indicates that the outdoor unit, operating at the default frequency in cooling mode, is generating insufficient cooling capacity. This results in a lower first coil temperature during heat exchange at the evaporator, resulting in a relatively high output air temperature and insufficient rapid cooling of the indoor air. Therefore, the coil temperature needs to be increased. A conversion is performed based on the first coil temperature and the first outlet air temperature to obtain the first target coil temperature.

[0176] The first control module 240 packages the converted first target coil temperature into a frequency increase instruction and distributes it to the outdoor unit.

[0177] The outdoor unit receives and responds to the frequency increase command, controlling its internal compressor to increase its operating frequency, thereby raising the indoor unit's coil temperature accordingly. When the coil temperature reaches a first target coil temperature, a sensor module located at the coil sends a signal to the outdoor unit, indicating that the target coil temperature has been reached and that the frequency increase can be stopped.

[0178] Optionally, the coil temperature compensation module 230 includes a first temperature difference determination unit, a second temperature difference determination unit, and a coil temperature compensation unit, wherein:

[0179] The first temperature difference determining unit is configured to determine a first temperature difference based on the first coil temperature and the first outlet air temperature.

[0180] The second temperature difference determining unit is configured to determine a second temperature difference based on the current room temperature and the first target room temperature.

[0181] The coil temperature compensation unit is configured to determine a first target coil temperature based on the first coil temperature, the first temperature difference, and the second temperature difference.

[0182] The first target room temperature is the optimal cooling temperature in the cooling mode.

[0183] Optionally, the control device of the outdoor unit further includes a second temperature monitoring module, a coil temperature reduction module and a second control module, wherein:

[0184] The second temperature monitoring module is configured to obtain a second coil temperature and a second air outlet temperature when the operating mode is determined to be the heating mode.

[0185] The coil temperature reducing module is configured to determine a second target coil temperature based on the second coil temperature and the second outlet air temperature when it is determined that the second coil temperature is greater than the second outlet air temperature.

[0186] The second control module is used to control the outdoor unit to reduce the frequency until the coil temperature drops to a second target coil temperature.

[0187] The working mode is determined based on the air conditioner operation information.

[0188] Optionally, the coil temperature reduction module includes a third temperature difference determining unit, a fourth temperature difference determining unit and a coil temperature reduction unit, wherein:

[0189] The third temperature difference determining unit is configured to determine a third temperature difference based on the second coil temperature and the second air outlet temperature.

[0190] The fourth temperature difference determining unit is configured to determine a fourth temperature difference based on the current room temperature and the second target room temperature.

[0191] The coil temperature reducing unit is configured to determine a second target coil temperature based on the second coil temperature, the third temperature difference, and the fourth temperature difference.

[0192] The second target room temperature is the optimal heating temperature in the heating mode.

[0193] Optionally, the control device of the outdoor unit further includes a target operating frequency determination module and a third control module, wherein:

[0194] The target operating frequency determination module is configured to determine the target operating frequency based on the first target coil temperature.

[0195] The third control module is used to control the outdoor unit to increase the frequency based on the target operating frequency.

[0196] Optionally, the control device of the outdoor unit further includes a target opening determination module, a fourth control module and a fifth control module, wherein:

[0197] The target opening degree determination module is configured to determine a target opening degree based on a first target coil temperature.

[0198] The fourth control module is configured to control the electronic expansion valve of the outdoor unit to operate at the rated minimum opening when it is determined that the target opening is less than or equal to the rated minimum opening.

[0199] The fifth control module is configured to control the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature when it is determined that the coil temperature at the minimum opening is lower than the first target coil temperature.

[0200] The control device of the outdoor unit provided in an embodiment of the present invention is used to execute the control method of the outdoor unit described above. Its implementation method is consistent with the implementation method of the control method of the outdoor unit provided by the present invention and can achieve the same beneficial effects, which will not be repeated here.

[0201] The embodiment of the present invention performs a comparative analysis based on the first coil temperature and the first outlet air temperature in the cooling mode. When deciding to increase the cooling capacity, the first target coil temperature is calculated to control the outdoor unit to dynamically adjust the operating frequency. This achieves the average performance of each branch effect of the indoor unit reflected by the coil temperature and the outlet air temperature, and can better reflect the actual cooling state, providing an accurate basis for subsequent intelligent cooling adjustment, thereby improving cooling performance.

[0202] Figure 3 Schematic diagram of the structure of the air conditioner provided by the present invention. Figure 3 As shown, the air conditioner includes an indoor unit 310 and an outdoor unit 320. The indoor unit 310 is provided with a control processor 311, a first sensor module 312 and a second sensor module 313. The first sensor module 312 is arranged inside the coil of the indoor unit 310; the second sensor module 313 is arranged at the air outlet of the indoor unit 310; and it also includes a memory and a program or instruction stored in the memory and executable on the control processor 311. When the program or instruction is executed by the control processor 311, a control method for the outdoor unit is executed.

[0203] The first sensor module 312 is used to collect the coil temperature after the air conditioner starts the working mode, and the second sensor module 313 is used to collect the outlet air temperature after the air conditioner starts the working mode.

[0204] Specifically, the air conditioner consists of an indoor unit 310 and an outdoor unit 320. A control processor 311, which can be integrated into the control development board of the indoor unit 310 as a chip or microprocessor, communicates with the outdoor unit 320, the first sensor module 312, and the second sensor module 313 to compensate for coil temperature in the indoor unit's cooling mode by controlling the operating frequency.

[0205] A first sensor module 312 is also required to be installed at the coil of the indoor unit 310 to collect real-time coil humidity in cooling / heating mode. A second sensor module 313 is also required to be installed at the air outlet of the indoor unit 310 housing to collect real-time outlet air humidity in cooling / heating mode. Both data are fed back to the control processor 311 for logical judgment of the opening degree and / or operating frequency of the outdoor unit 320. The control processor 311 uses wireless communication technology to transmit signals with the outdoor unit 320, the first sensor module 312, and the second sensor module 313.

[0206] The embodiment of the present invention does not specifically limit the number of temperature sensors in the first sensor module 312 .

[0207] Optionally, the first sensing module 312 may be provided with a humidity sensor in the middle section of the coil, and the control device of the outdoor unit uses the temperature data collected by the humidity sensor as the first coil temperature.

[0208] Optionally, the first sensing module 312 may include multiple temperature sensors evenly spaced on the coil, and the control device of the outdoor unit may add and average the temperature data collected by the sensors to obtain the first coil temperature.

[0209] Similarly, the air outlet in the indoor unit 310 can also be provided with a second sensor module 321 according to the above solution.

[0210] Among them, wireless communication technology includes but is not limited to WIFI wireless cellular signals (2G, 3G, 4G, 5G), Bluetooth, Zigbee and other methods, which are not specifically limited in the embodiments of the present invention.

[0211] The air conditioner of the present invention further includes a memory and a program or instruction stored in the memory and executable on a control processor 311. The control processor 311 can invoke the logic instructions in the memory to execute the control method of the outdoor unit of the present invention, which includes: obtaining air conditioner operation information; if the operating mode is determined to be cooling mode, obtaining a first coil temperature and a first outlet air temperature; if the first coil temperature is determined to be less than the first outlet air temperature, determining a first target coil temperature based on the first coil temperature and the first outlet air temperature; and controlling the outdoor unit to increase the frequency until the coil temperature reaches the first target coil temperature. The operating mode is determined based on the air conditioner operation information.

[0212] In addition, the logical instructions in the above-mentioned memory can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0213] The embodiment of the present invention performs a comparative analysis based on the first coil temperature and the first outlet air temperature in the cooling mode. When deciding to increase the cooling capacity, the first target coil temperature is calculated to control the outdoor unit to dynamically adjust the operating frequency. This achieves the average performance of each branch effect of the indoor unit reflected by the coil temperature and the outlet air temperature, and can better reflect the actual cooling state, providing an accurate basis for subsequent intelligent cooling adjustment, thereby improving cooling performance.

[0214] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the outdoor unit provided by the above methods, the method including: obtaining air-conditioning operation information; when it is determined that the operating mode is a cooling mode, obtaining a first coil temperature and a first air outlet temperature; when it is determined that the first coil temperature is less than the first air outlet temperature, determining a first target coil temperature based on the first coil temperature and the first air outlet temperature; controlling the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature; wherein the operating mode is determined based on the air-conditioning operation information.

[0215] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the control method of the outdoor unit provided by the above-mentioned methods, the method comprising: obtaining air-conditioning operation information; when it is determined that the operating mode is a cooling mode, obtaining a first coil temperature and a first air outlet temperature; when it is determined that the first coil temperature is less than the first air outlet temperature, determining a first target coil temperature based on the first coil temperature and the first air outlet temperature; controlling the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature; wherein the operating mode is determined based on the air-conditioning operation information.

[0216] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0217] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0218] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A control method for an outdoor unit, characterized in that: include: Get air conditioning operation information; When the operating mode is determined to be the cooling mode, obtaining a first coil temperature and a first air outlet temperature; If it is determined that the first coil temperature is less than the first outlet air temperature, determining a first target coil temperature based on the first coil temperature and the first outlet air temperature; determining a target operating frequency based on the first target coil temperature; and controlling the outdoor unit to increase its frequency based on the target operating frequency until the coil temperature rises to the first target coil temperature. wherein the operating mode is determined based on the air conditioner operation information, wherein the first target coil temperature is a target value obtained after compensating the coil temperature when the actual cooling capacity reaches the ideal cooling capacity requirement of the cooling mode; The determining, when determining that the first coil temperature is less than the first outlet air temperature, of a first target coil temperature based on the first coil temperature and the first outlet air temperature includes: determining a first temperature difference based on the first coil temperature and the first outlet air temperature; determining a second temperature difference based on a current room temperature and a first target room temperature; and determining the first target coil temperature based on the first coil temperature, the first temperature difference, and the second temperature difference. The first target room temperature is the optimal cooling temperature in the cooling mode.

2. The control method of the outdoor unit according to claim 1, characterized in that: After obtaining the air conditioner operation information, the method further includes: When it is determined that the operating mode is the heating mode, obtaining the second coil temperature and the second air outlet temperature; If it is determined that the second coil temperature is greater than the second outlet air temperature, determining a second target coil temperature based on the second coil temperature and the second outlet air temperature; Controlling the outdoor unit to reduce frequency until the coil temperature drops to the second target coil temperature; Wherein, the working mode is determined based on the air-conditioning operation information.

3. The control method of the outdoor unit according to claim 2, characterized in that: The determining, when determining that the second coil temperature is greater than the second outlet air temperature, of a second target coil temperature based on the second coil temperature and the second outlet air temperature includes: determining a third temperature difference based on the second coil temperature and the second outlet air temperature; determining a fourth temperature difference based on the current room temperature and the second target room temperature; determining the second target coil temperature based on the second coil temperature, the third temperature difference, and the fourth temperature difference; The second target room temperature is the optimal heating temperature in the heating mode.

4. A control method for an outdoor unit, characterized in that: include: Get air conditioning operation information; When the operating mode is determined to be the cooling mode, obtaining a first coil temperature and a first air outlet temperature; If it is determined that the first coil temperature is less than the first outlet air temperature, determining a first target coil temperature based on the first coil temperature and the first outlet air temperature; determining a target opening degree based on the first target coil temperature; When it is determined that the target opening is less than or equal to the rated minimum opening, controlling the electronic expansion valve of the outdoor unit to operate at the rated minimum opening; When it is determined that the coil temperature at the minimum opening is lower than the first target coil temperature, controlling the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature; wherein the operating mode is determined based on the air conditioner operation information, wherein the first target coil temperature is a target value obtained after compensating the coil temperature when the actual cooling capacity reaches the ideal cooling capacity requirement of the cooling mode; The determining, when determining that the first coil temperature is less than the first outlet air temperature, of a first target coil temperature based on the first coil temperature and the first outlet air temperature includes: determining a first temperature difference based on the first coil temperature and the first outlet air temperature; determining a second temperature difference based on a current room temperature and a first target room temperature; and determining the first target coil temperature based on the first coil temperature, the first temperature difference, and the second temperature difference. The first target room temperature is the optimal cooling temperature in the cooling mode.

5. A control device for an outdoor unit, characterized in that: include: Operation information acquisition module, used to obtain air conditioner operation information; A first temperature monitoring module is configured to obtain a first coil temperature and a first air outlet temperature when the operating mode is determined to be a cooling mode; a coil temperature compensation module, configured to determine a first target coil temperature based on the first coil temperature and the first outlet air temperature when it is determined that the first coil temperature is less than the first outlet air temperature; a first control module, configured to control the outdoor unit to increase the frequency until the coil temperature rises to the first target coil temperature; wherein the operating mode is determined based on the air conditioner operation information, wherein the first target coil temperature is a target value obtained after compensating the coil temperature when the actual cooling capacity reaches the ideal cooling capacity requirement of the cooling mode; The determining, when determining that the first coil temperature is less than the first outlet air temperature, of a first target coil temperature based on the first coil temperature and the first outlet air temperature includes: determining a first temperature difference based on the first coil temperature and the first outlet air temperature; determining a second temperature difference based on a current room temperature and a first target room temperature; and determining the first target coil temperature based on the first coil temperature, the first temperature difference, and the second temperature difference. Wherein, the first target room temperature is the optimal cooling temperature under the cooling mode; After determining the first target coil temperature, the method further includes: determining a target operating frequency based on the first target coil temperature; and controlling the outdoor unit boost frequency based on the target operating frequency.

6. An air conditioner comprising an indoor unit and an outdoor unit, characterized in that: The indoor unit is provided with a control processor, a first sensor module, and a second sensor module, wherein the first sensor module is provided inside the coil of the indoor unit; the second sensor module is provided at the air outlet of the indoor unit; and further includes a memory and a program or instruction stored in the memory and executable on the control processor, wherein the program or instruction, when executed by the control processor, executes the control method for the outdoor unit according to any one of claims 1 to 4; Among them, the first sensor module is used to collect the coil temperature after the air conditioner starts the working mode; the second sensor module is used to collect the outlet air temperature after the air conditioner starts the working mode.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the outdoor unit according to any one of claims 1 to 4 is implemented.

8. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the control method of the outdoor unit according to any one of claims 1 to 4 is implemented.

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