Defrosting control method and device for outdoor unit condenser and air conditioner
By acquiring the heating capacity information set of the air conditioner heat exchanger and analyzing the degree of attenuation to generate a defrost command, the problem of defrost sensor detection lag is solved, thus improving the energy saving and heating performance of the air conditioner.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
- Filing Date
- 2023-07-05
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, the defrost temperature sensor of an air conditioner is covered by frost and snow, which prevents it from detecting the frost on the condenser in a timely manner, resulting in a delay in defrosting operation and affecting the energy-saving and heating performance of the air conditioner.
By acquiring the target heating capacity information set of the air conditioner heat exchanger, analyzing the degree of heating capacity attenuation, and generating a defrost command to trigger the defrost operation, the sensor detection is avoided from being affected by frost and snow.
It enables faster detection of condenser frost conditions, avoiding defrosting only when frost is severe, optimizing the energy-saving and heating performance of air conditioning units, and ensuring user experience.
Smart Images
Figure CN119268074B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of air conditioning heating technology, and in particular to a defrosting control method, device and air conditioner for an outdoor unit condenser. Background Technology
[0002] When an air conditioner is used for heating in winter, the temperature of the outdoor unit's condenser is low, and its surface is prone to frost buildup. The condenser needs to be defrosted to ensure the heating effect of the air conditioner.
[0003] Currently, the defrost temperature sensor installed in the outdoor unit's condenser is generally used to detect the temperature, and the defrost operation is triggered when the detected temperature is low.
[0004] However, when the condenser is frosted over, the defrost temperature sensor is covered by frost and snow, which also has some insulating properties. This prevents the sensor from accurately reflecting the frost level on the outdoor unit's condenser, resulting in defrosting only when the condenser is severely frosted. At this point, defrosting the condenser requires a significant amount of heating and power from the air conditioner, compromising the unit's energy efficiency and heating performance.
[0005] Currently, the industry has not proposed a better technical solution to the above problems. Summary of the Invention
[0006] This application provides a defrosting control method, device, air conditioner, and computer-readable storage medium for an outdoor unit condenser, which at least solves the defect in the prior art where air conditioners detect and trigger defrosting operations based on defrosting temperature sensors, resulting in defrosting operations only being performed when the condenser is severely frosted, thus causing a serious reduction in the energy-saving and heating performance of the air conditioning unit.
[0007] This application provides a defrosting control method for an outdoor unit condenser. The method includes: acquiring a target heating capacity information set for a preset time period corresponding to the heat exchanger of an air conditioner, wherein each heating capacity information set has a corresponding sampling time; determining a heating capacity attenuation index based on the target heating capacity information set; the heating capacity attenuation index defining the degree of attenuation of the heating capacity of the heat exchanger during the preset time period; and generating a defrosting command when the heating capacity attenuation index is determined to be greater than a preset attenuation threshold, wherein the defrosting command is used to trigger the outdoor unit condenser of the air conditioner to perform a defrosting operation.
[0008] According to the defrosting control method for an outdoor unit condenser provided in this application, the step of obtaining a target heating capacity information set for a preset time period corresponding to the heat exchanger of the air conditioner includes: obtaining multiple heat exchange fluid temperature differences at consecutive sampling times within the preset time period; each heat exchange fluid temperature difference has a corresponding sampling time, and the heat exchange fluid temperature difference is the difference between the heat exchange outlet fluid temperature and the heat exchange inlet fluid temperature; the heat exchange inlet fluid temperature represents the temperature of the heat exchange fluid flowing into the inlet of the air conditioner's heat exchanger, and the heat exchange outlet fluid temperature represents the temperature of the heat exchange fluid flowing out of the outlet of the heat exchanger; for each heat exchange fluid temperature difference, the heating capacity information of the heat exchanger is determined accordingly based on the heat exchange fluid temperature difference; and the target heating capacity information set is determined based on each heating capacity information.
[0009] According to the defrosting control method for an outdoor unit condenser provided in this application, the step of determining the heating capacity information of the heat exchanger based on the temperature difference of each heat exchange fluid includes: determining the heating capacity information corresponding to each heat exchange fluid temperature difference based on a preset heating capacity relationship; the heating capacity relationship defines the calculation relationship between the heat exchange fluid temperature difference and the heating capacity.
[0010] According to the defrosting control method for an outdoor unit condenser provided in this application, the step of determining a heating capacity attenuation index based on the target heating capacity information set includes: comparing a first heating capacity information with a second heating capacity information for each heating capacity information in the target heating capacity information set to determine the corresponding heating capacity difference; the first sampling time corresponding to the first heating capacity information is adjacent to the second sampling time corresponding to the second heating capacity information; and determining the heating capacity attenuation index based on each heating capacity difference.
[0011] According to the defrosting control method for an outdoor unit condenser provided in this application, the step of determining a heating attenuation index based on the heating capacity difference includes: for each heating capacity difference, determining the heating capacity change rate based on the heating capacity difference and the corresponding sampling time interval; the sampling time interval is the difference between the first sampling time and the second sampling time; and determining the heating attenuation index based on the heating capacity change rate.
[0012] According to the defrosting control method for an outdoor unit condenser provided in this application, the step of generating a defrosting command when the heating capacity attenuation index is determined to be greater than a preset attenuation threshold includes: determining a target defrosting intensity corresponding to the heating capacity attenuation index according to a preset defrosting intensity model when the heating capacity attenuation index is determined to be greater than the preset attenuation threshold; the defrosting intensity model defines the relationship between the heating capacity attenuation index and the defrosting intensity; generating a defrosting command according to the target defrosting intensity, the defrosting command being used to trigger the outdoor unit condenser to perform a defrosting operation corresponding to the target defrosting intensity.
[0013] According to the defrosting control method for an outdoor unit condenser provided in this application, the step of obtaining a target heating capacity information set corresponding to a preset time period for the heat exchanger of the air conditioner includes: collecting a first heating capacity information set corresponding to a first preset time period for the heat exchanger; detecting whether there is an air conditioner speed adjustment operation within the preset time period; the air conditioner speed adjustment operation instructing the user to adjust the heating speed of the air conditioner; and determining the target heating capacity information set based on the first heating capacity information set if it is determined that there is no air conditioner speed adjustment operation.
[0014] According to the defrosting control method for an outdoor unit condenser provided in this application, after detecting whether an air conditioner speed adjustment operation exists within the preset time period, the method further includes: if it is determined that the air conditioner speed adjustment operation exists, clearing the first heating capacity information set and re-collecting the second heating capacity information set corresponding to the second preset time period of the heat exchanger; the second preset time period and the first preset time period correspond to the same time interval; and determining the target heating capacity information set based on the second heating capacity information set.
[0015] This application also provides a defrosting control device for an outdoor unit condenser. The device includes: an acquisition unit for acquiring a target heating capacity information set of the air conditioner's heat exchanger for a preset time period, wherein each heating capacity information set has a corresponding sampling time; a determination unit for determining a heating capacity attenuation index based on the target heating capacity information set, wherein the heating capacity attenuation index defines the degree of attenuation of the heat exchanger's heating capacity during the preset time period; and an instruction generation unit for generating a defrosting instruction when the heating capacity attenuation index is determined to be greater than a preset attenuation threshold, wherein the defrosting instruction is used to trigger the outdoor unit condenser of the air conditioner to perform a defrosting operation.
[0016] This application also provides an air conditioner, including: an outdoor unit comprising a condenser; a heat exchanger; and a controller; wherein the controller is configured to perform a defrosting control method for the outdoor unit condenser as described above.
[0017] This application also provides an air conditioner, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the defrosting control method for the outdoor unit condenser as described above through the computer program.
[0018] This application also provides a computer-readable storage medium comprising a stored program, wherein the program, when executed, performs a defrosting control method for the outdoor unit condenser as described above.
[0019] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the defrosting control method for the outdoor unit condenser as described above.
[0020] The defrosting control method, device, and air conditioner for the outdoor unit condenser provided in this application address the issue that when the condenser of the air conditioner frosts over, the heating capacity of the air conditioning unit will decrease to a certain extent. By acquiring the target heating capacity information set of the heat exchanger within a preset time period and analyzing the degree of decrease in the heat exchanger's heating capacity within the preset time period, a defrosting command is generated when a large decrease in heating capacity is detected. Compared with a defrosting temperature sensor, this method can detect the frost status of the condenser more quickly, avoiding defrosting operations only when the condenser is severely frosted. The defrosting operation does not excessively consume the air conditioner's heating capacity and power, thus optimizing the energy-saving and heating performance of the air conditioning unit and continuously ensuring the user experience in the air conditioning heating mode. Attached Figure Description
[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the hardware environment for a defrosting control method for an outdoor unit condenser according to an embodiment of this application.
[0024] Figure 2 A structural block diagram of an example air conditioner suitable for applying the defrosting control method of the outdoor unit condenser according to embodiments of this application is shown.
[0025] Figure 3 A flowchart illustrating an example of a defrosting control method for an outdoor unit condenser according to an embodiment of this application is shown.
[0026] Figure 4 A flowchart illustrating an example of a defrosting control method for an outdoor unit condenser according to an embodiment of the present invention is shown.
[0027] Figure 5 It shows that according to Figure 3 An example operation flowchart of step S310 in the process;
[0028] Figure 6 A structural block diagram of an example of a defrosting control device for an outdoor unit condenser according to an embodiment of this application is shown;
[0029] Figure 7 A structural block diagram of an example air conditioner according to an embodiment of this application is shown;
[0030] Figure 8 This is a structural schematic diagram of the air conditioner provided in this application. Detailed Implementation
[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0033] According to one aspect of the embodiments of this application, a defrosting control method for an outdoor unit condenser is provided. This defrosting control method for an outdoor unit condenser is widely used in whole-house intelligent digital control application scenarios such as smart homes, smart home ecosystems, and intelligence house ecosystems. Optionally, in this embodiment, the above-mentioned defrosting control method for an outdoor unit condenser can be applied to, for example... Figure 1The hardware environment shown consists of terminal device 102 (e.g., air conditioner) and server 104. Figure 1 As shown, server 104 is connected to terminal device 102 via a network and can be used to provide services (such as application services) to the terminal or clients installed on the terminal. A database can be set up on the server or independently of the server to provide data storage services for server 104. Cloud computing and / or edge computing services can be configured on the server or independently of the server to provide data processing services for server 104.
[0034] The aforementioned networks may include, but are not limited to, at least one of the following: wired network, wireless network. The aforementioned wired network may include, but is not limited to, at least one of the following: wide area network, metropolitan area network, local area network. The aforementioned wireless network may include, but is not limited to, at least one of the following: Wi-Fi (Wireless Fidelity), Bluetooth.
[0035] Figure 2 A structural block diagram of an example air conditioner suitable for applying the defrosting control method of the outdoor unit condenser according to embodiments of this application is shown.
[0036] like Figure 2 As shown, the air conditioner includes an outdoor unit 210, an indoor unit 220, and a heat exchanger 230. In a multi-split air conditioner, one outdoor unit 210 can be connected to multiple indoor unit pipes. The outdoor unit 210 houses a compressor 215, a condenser 211, and a defrost temperature sensor 213. The heat exchanger 230 can employ various non-limiting heat exchange units, such as a water-refrigerant heat exchanger, allowing the refrigerant in the outdoor unit 210 pipes and the heat exchange medium (e.g., water) in the indoor unit 220 pipes to exchange heat in the heat exchanger 230 through inlet and outlet water. In an exemplary heating cycle, the refrigerant enters the outdoor unit condenser 211 from the compressor 215 via a throttling device, then enters the heat exchanger 230 for heat exchange, and flows back to the compressor 215 under valve control to form a complete heating cycle.
[0037] Figure 3 A flowchart illustrating an example of a defrosting control method for an outdoor unit condenser according to an embodiment of this application is shown. The implementing entity of the method in this application embodiment can be any processor or controller with processing or computing capabilities, and can be located in the air conditioning terminal, such as the indoor unit. Through local data processing, and also by integrating data communication with a server, the method aims to promptly monitor the frosting status of the outdoor unit condenser and quickly control its defrosting, thereby ensuring the stability of the air conditioning's heating and energy-saving performance and guaranteeing the comfort experience of indoor users in air conditioning heating mode.
[0038] like Figure 3As shown, in step S310, the target heating capacity information set corresponding to the heat exchanger of the air conditioner for a preset time period is obtained, and each heating capacity information set in the target heating capacity information set has a corresponding sampling time.
[0039] Here, the preset time period can represent a preset judgment period or calculation window, which includes two or more sampling times.
[0040] In one example of this invention, a calorimeter is provided for the heat exchanger to detect its output heat capacity at different sampling times. In another example of this invention, at each sampling time, the temperature rise of the heat exchanger on the heat exchange fluid is detected, and the corresponding heat capacity is obtained by calculation.
[0041] In step S320, a heating attenuation index is determined based on the target heating capacity information set. The heating attenuation index defines the degree of attenuation of the heat exchanger's heating capacity over a preset time period.
[0042] In one example of this invention, the heating capacity attenuation index is determined by comparing the target heating capacity information corresponding to a later sampling time with the target heating capacity information corresponding to an earlier sampling time in the target heating capacity information set. In another example of this invention, the heating capacity attenuation index is determined by identifying the average fluctuation range of the heat exchanger's heating capacity information over a preset time period based on the heating capacity information set.
[0043] In step S330, if the heating attenuation index is determined to be greater than the preset attenuation threshold, a defrost command is generated. The defrost command is used to trigger the outdoor unit condenser of the air conditioner to perform a defrost operation.
[0044] It should be noted that when the outdoor ambient temperature is low and the outdoor humidity is high, the condenser is prone to frosting because it is on the low-pressure side. After the condenser frosts, heat exchange on the evaporator side is affected, thus reducing its heating performance. Furthermore, the severity of the condenser frost directly affects the heating capacity of the air conditioning unit. Based on this working principle, in this embodiment of the invention, the degree of decrease in the heating capacity of the air conditioning unit's heat exchanger over a certain period is detected to determine whether to trigger a defrosting operation. Compared to a defrosting temperature sensor, this method can detect the condenser's frosting status more quickly, avoiding defrosting only when the condenser is severely frosted. The defrosting operation does not excessively consume the air conditioning's heating capacity and power, effectively ensuring the energy-saving and heating performance of the air conditioning unit and continuously guaranteeing the user experience in the air conditioning heating mode.
[0045] Figure 4 A flowchart illustrating an example of a defrosting control method for an outdoor unit condenser according to an embodiment of the present invention is shown.
[0046] like Figure 4 As shown, in step S410, multiple heat exchange fluid temperature differences are obtained at consecutive sampling times corresponding to the preset time period. Each heat exchange fluid temperature difference has a corresponding sampling time, and the heat exchange fluid temperature difference is the difference between the heat exchange outlet fluid temperature and the heat exchange inlet fluid temperature.
[0047] It should be noted that the heat exchange fluid can refer to the heat exchange medium (e.g., water) used to exchange heat with the fluid in the indoor unit piping or the refrigerant (e.g., Freon) used to exchange heat with the fluid in the outdoor unit piping, and no limitation is imposed here.
[0048] Here, the heat exchange fluid inlet temperature refers to the temperature of the heat exchange fluid flowing into the heat exchanger from the inlet of the air conditioner, and the heat exchange fluid outlet temperature refers to the temperature of the heat exchange fluid flowing out from the outlet of the heat exchanger, such as water temperature or refrigerant temperature.
[0049] In step S420, the heating capacity information of the heat exchanger is determined based on the temperature difference of each heat exchange fluid.
[0050] In some implementations, temperature sensors are installed at the inlet and outlet of the heat exchanger to detect the temperature difference between the water entering and exiting the heat exchanger. Specifically, for each temperature difference of the heat exchange fluid, the corresponding heat capacity information is determined based on a preset heat capacity relationship. Here, the heat capacity relationship defines the calculation relationship between the temperature difference of the heat exchange fluid and the heat capacity.
[0051] For example, according to the heat calculation formula Q = c 水 From m△T, we can know that when the system water flow rate m is constant, the outlet water temperature T of the heat exchanger is measured. o and inlet water temperature T i The heating capacity Q of the air conditioning unit and the temperature difference between the inlet and outlet water ΔT (ΔT = T) o -T i It is directly proportional to ΔT, so ΔT can be used as a direct criterion for judging the heating performance of the system.
[0052] In step S430, the target heating information set is determined based on the various heating information.
[0053] Therefore, by using the target heating capacity information set, the heating capacity information of the heat exchanger at multiple different sampling times can be summarized.
[0054] In step S440, for each heat capacity information in the target heat capacity information set, the first heat capacity information is compared with the second heat capacity information to determine the corresponding heat capacity difference.
[0055] Here, the first sampling time corresponding to the first heating capacity information is adjacent to the second sampling time corresponding to the second heating capacity information.
[0056] In one example of this embodiment, the heating capacity information can be directly represented by the heat unit Q. That is, the first heating capacity information Q1 corresponds to the first sampling time t1, and the second heating capacity information Q2 corresponds to the second sampling time t2, where t1 and t2 are adjacent sampling times. In another example of this embodiment, due to the proportional relationship between heat capacity information and temperature difference information, the heating capacity information can also be directly represented by ΔT. That is, the first heating capacity information ΔT1 corresponds to the first sampling time t1, and the second heating capacity information ΔT2 corresponds to the second sampling time t2.
[0057] In step S450, for each heating capacity difference, the heating capacity change rate is determined based on the heating capacity difference and the corresponding sampling time interval, where the sampling time interval is the difference between the first sampling time and the second sampling time.
[0058] It should be noted that when the outdoor unit condenser is frosted, its heat exchange performance will be affected, which will inevitably lead to a decrease in the heating capacity of the air conditioning unit. As reflected in the temperature difference ΔT between the inlet and outlet water of the unit, the difference will gradually decrease. Therefore, the rate of change of ΔT (i.e., the rate of change of the inlet and outlet water temperature difference) can be used as the rate of change of heating capacity to determine whether to defrost.
[0059] Specifically, the rate of change of inlet and outlet water temperature difference δ per unit time is calculated using the following method. △T :
[0060] δ △T =(△T) t2 -△T t1 ) / △t formula (1)
[0061] Where, δ △t ℃ / min can be used as the unit of measurement, △T t2 Let ΔT be the temperature difference between the inlet and outlet water at sampling time t2. t1 The inlet and outlet water temperature difference at the previous sampling time t1 is Δt = t2 - t1.
[0062] During the time interval Δt, δ △t When the value is greater than α, it means that the rate of temperature change at time t2 is higher than that at time t1, and the heating capacity of the air conditioning unit is significantly reduced.
[0063] In step S460, the heating attenuation index is determined based on the rate of change of each heating capacity.
[0064] Here, by summarizing the various rates of change in heating capacity, the final determined heating capacity attenuation index can balance the errors at different sampling times, ensuring that the determined heating capacity attenuation index more accurately reflects the true degree of attenuation of the heat exchanger's heating capacity. For example, the inlet and outlet water temperature differences over a continuous time period (e.g., 5 minutes) are selected, and the corresponding cumulative average value is calculated, which serves as the basis for determining the heating capacity attenuation index. Therefore, the rate of change of the inlet and outlet water temperature differences is used to determine the amount of heating performance attenuation of the air conditioning unit, and this is used as the basis for establishing the criteria for determining whether defrosting operation is required.
[0065] In step S470, if it is determined that the heating attenuation index is greater than the preset attenuation threshold, the target defrost intensity corresponding to the heating attenuation index is determined according to the preset defrost intensity model.
[0066] Here, the defrost intensity model defines the relationship between the heating capacity attenuation index and the defrost intensity, which can be pre-calibrated by the tester. For example, the relationship between the heating capacity attenuation index and the defrost intensity is positively correlated. That is, the larger the heating capacity attenuation index, the more the heating performance of the air conditioning unit is reduced. At this time, the degree of frost on the outdoor unit of the air conditioner is also more serious, and the defrost intensity needs to be increased accordingly.
[0067] In step S480, a defrost command is generated based on the target defrost intensity. The defrost command is used to trigger the outdoor unit condenser to perform a defrost operation corresponding to the target defrost intensity.
[0068] Through the embodiments of the present invention, when the heating attenuation index is determined to be large, the corresponding defrosting intensity is determined according to the heating attenuation index, so that the defrosting intensity of the defrosting operation can match the degree of frost on the outdoor unit of the air conditioner. While achieving rapid defrosting, it can also reduce the occupation of system resources, effectively ensure the energy-saving performance and heating performance of the air conditioning unit, and continuously ensure the user experience in the air conditioning heating mode.
[0069] Figure 5 It shows that according to Figure 3 An example operation flowchart for step S310.
[0070] like Figure 5 As shown, in step S510, the first heating capacity information set corresponding to the first preset time period of the heat exchanger is collected.
[0071] In step S520, it is detected whether there is an air conditioner setting adjustment operation within a preset time period. The air conditioner setting adjustment operation instructs the user to adjust the heating setting of the air conditioner.
[0072] For example, by calling the air conditioner operation log, it can be used to identify whether there are records of air conditioner speed adjustment within a preset time period during the sampling operation.
[0073] In step S531, if it is determined that there is no air conditioning speed adjustment operation, the target heating information set is determined based on the first heating information set.
[0074] In step S533, if it is determined that there is an air conditioning speed adjustment operation, the first heating information set is cleared and the second heating information set corresponding to the second preset time period of the heat exchanger is collected again.
[0075] In step S540, the target heating capacity information set is determined based on the second heating capacity information set.
[0076] It should be noted that user adjustments to the heating level, such as raising or lowering the heating level, generally trigger changes in the heating capacity under normal circumstances. This is a normal heating capacity adjustment process and should not be used to measure the heating capacity reduction index. In this embodiment of the invention, after sampling multiple heat data points from the heat exchanger over a period of time, it is also necessary to detect whether there was any gear-switching operation information during this period. If not, this heat data is used to calculate the corresponding heating capacity reduction index. If it was, heat data needs to be collected again to ensure that the sampled heating capacity information corresponds to the same gear level, guaranteeing the high accuracy of the obtained heating capacity reduction index and avoiding deviations in the judgment of the outdoor unit's frosting status caused by human gear-switching operations.
[0077] The defrosting control device for the outdoor unit condenser provided in this application is described below. The defrosting control device for the outdoor unit condenser described below can be referred to in correspondence with the defrosting control method for the outdoor unit condenser described above.
[0078] Figure 6 A structural block diagram of an example of a defrosting control device for an outdoor unit condenser according to an embodiment of this application is shown.
[0079] like Figure 6 As shown, the defrosting control device 600 for the outdoor unit condenser includes an acquisition unit 610, a determination unit 620, and an instruction generation unit 630.
[0080] The acquisition unit 610 is used to acquire a target heating capacity information set corresponding to a preset time period of the heat exchanger of the air conditioner, wherein each heating capacity information in the target heating capacity information set has a corresponding sampling time.
[0081] The determining unit 620 is used to determine a heating attenuation index based on the target heating capacity information set; the heating attenuation index defines the degree of attenuation of the heating capacity of the heat exchanger during the preset time period.
[0082] The instruction generation unit 630 is used to generate a defrost instruction when it is determined that the heating attenuation index is greater than a preset attenuation threshold. The defrost instruction is used to trigger the outdoor unit condenser of the air conditioner to perform a defrost operation.
[0083] Figure 7 A structural block diagram of an example air conditioner according to an embodiment of this application is shown.
[0084] like Figure 7 As shown, the air conditioner 700 includes an outdoor unit 710, a heat exchanger 720, and a controller 730. The outdoor unit 710 includes a condenser 711. The controller 730 enables the implementation of the defrosting control method for the outdoor unit condenser as described above, achieving the same or similar technical effects as the above-described method embodiments. Further details can be found in the above description. Figure 1-5 The relevant descriptions in the text will not be repeated here.
[0085] Figure 8 An example is a schematic diagram of the physical structure of an air conditioner, such as... Figure 8 As shown, the air conditioner may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logic instructions in the memory 830 to execute a defrosting control method for the outdoor unit condenser. This method includes: acquiring the outdoor ambient temperature, the indoor unit air outlet temperature, and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located; the indoor unit includes an electronic expansion valve; determining an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; and correcting the initial superheat according to the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve.
[0086] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0087] On the other hand, this application also provides a computer program product, which includes a computer program that can be stored on a computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the defrosting control method for the outdoor unit condenser provided by the above methods. The method includes: acquiring an outdoor ambient temperature, an indoor unit outlet temperature, and an indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment where the outdoor unit of the air conditioner is located, and the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, wherein the indoor unit includes an electronic expansion valve; determining an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; and correcting the initial superheat according to the temperature deviation between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.
[0088] In another aspect, this application also provides a computer-readable storage medium, the computer-readable storage medium including a stored program, wherein the program, when running, executes the defrosting control method for the outdoor unit condenser provided by the above methods, the method comprising: acquiring an outdoor ambient temperature, an indoor unit air outlet temperature, and an indoor ambient temperature; the outdoor ambient temperature being the temperature of the environment where the outdoor unit of the air conditioner is located, the indoor ambient temperature being the temperature of the environment where the indoor unit of the air conditioner is located, the indoor unit including an electronic expansion valve; determining an initial superheat corresponding to the outdoor ambient temperature based on a preset superheat setting model; the superheat setting model defining the relationship between the outdoor ambient temperature and the initial superheat; correcting the initial superheat according to the temperature deviation between the indoor ambient temperature and the indoor unit air outlet temperature, so as to determine the target superheat of the electronic expansion valve.
[0089] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0090] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A defrosting control method for an outdoor unit condenser, characterized in that, The method includes: Obtain a target heating capacity information set for a preset time period corresponding to the heat exchanger of the air conditioner, wherein each heating capacity information set has a corresponding sampling time. Based on the target heating capacity information set, a heating capacity attenuation index is determined; the heating capacity attenuation index defines the degree of attenuation of the heating capacity of the heat exchanger during the preset time period. If the heating attenuation index is determined to be greater than the preset attenuation threshold, a defrost command is generated. The defrost command is used to trigger the outdoor unit condenser of the air conditioner to perform a defrost operation. The step of determining the heating capacity attenuation index based on the target heating capacity information set includes: For each heat capacity information in the target heat capacity information set, the first heat capacity information and the second heat capacity information are compared to determine the corresponding heat capacity difference; the first sampling time corresponding to the first heat capacity information is adjacent to the second sampling time corresponding to the second heat capacity information. Based on the differences in heating capacity described above, the heating capacity attenuation index is determined; The step of determining the heating attenuation index based on the differences in heating capacity includes: For each of the aforementioned heating capacity differences, the rate of change of heating capacity is determined based on the heating capacity difference and the corresponding sampling time interval; the sampling time interval is the difference between the first sampling time and the second sampling time. The heating capacity attenuation index is determined based on the rate of change of each of the stated heating capacities. By summarizing the various different rates of change in heating capacity, the final determined heating capacity attenuation index can balance the errors at different sampling times, ensuring that the determined heating capacity attenuation index accurately reflects the true degree of attenuation of the heat exchanger's heating capacity. The acquisition of the target heating capacity information set corresponding to a preset time period for the air conditioner's heat exchanger includes: Collect a set of first heating capacity information corresponding to a first preset time period of the heat exchanger; Detect whether there is an air conditioner setting adjustment operation within the preset time period; the air conditioner setting adjustment operation instructs the user to adjust the heating setting of the air conditioner; If it is determined that there is no air conditioning speed adjustment operation, the target heating information set is determined based on the first heating information set; After detecting whether there is an air conditioning speed adjustment operation within the preset time period, the method further includes: If the air conditioner speed adjustment operation is confirmed, the first heating capacity information set is cleared, and the second heating capacity information set corresponding to the second preset time period of the heat exchanger is collected again; the second preset time period and the first preset time period correspond to the same time interval. The target heating capacity information set is determined based on the second heating capacity information set.
2. The defrosting control method for the outdoor unit condenser according to claim 1, characterized in that, The acquisition of the target heating capacity information set corresponding to a preset time period for the air conditioner's heat exchanger includes: Multiple heat exchange fluid temperature differences are obtained at consecutive sampling times within the preset time period; each heat exchange fluid temperature difference has a corresponding sampling time, and the heat exchange fluid temperature difference is the difference between the heat exchange outlet fluid temperature and the heat exchange inlet fluid temperature; the heat exchange fluid inlet temperature represents the temperature of the heat exchange fluid flowing into the heat exchanger from the inlet of the air conditioner, and the heat exchange fluid outlet temperature represents the temperature of the heat exchange fluid flowing out from the outlet of the heat exchanger; Based on the temperature difference of each heat exchange fluid, the heating capacity information of the heat exchanger is determined accordingly. Based on the various heat output information, the target heat output information set is determined.
3. The defrosting control method for the outdoor unit condenser according to claim 2, characterized in that, The step of determining the heating capacity information of the heat exchanger based on the temperature difference of each heat exchange fluid includes: For each of the heat exchange fluid temperature differences, the heat generation information corresponding to the heat exchange fluid temperature difference is determined based on a preset heat generation relationship; the heat generation relationship defines the calculation relationship between the heat exchange fluid temperature difference and the heat generation.
4. The defrosting control method for the outdoor unit condenser according to claim 1, characterized in that, The step of generating a defrost command when the heating attenuation index is determined to be greater than a preset attenuation threshold includes: If the heating attenuation index is determined to be greater than the preset attenuation threshold, the target defrosting intensity corresponding to the heating attenuation index is determined according to the preset defrosting intensity model; the defrosting intensity model defines the relationship between the heating attenuation index and the defrosting intensity. A defrost command is generated based on the target defrost intensity, and the defrost command is used to trigger the outdoor unit condenser to perform a defrost operation corresponding to the target defrost intensity.
5. A defrosting control device for an outdoor unit condenser, characterized in that, The defrosting control method for the outdoor unit condenser according to any one of claims 1-4, the apparatus comprising: The acquisition unit is used to acquire a set of target heating capacity information for a preset time period corresponding to the heat exchanger of the air conditioner, wherein each piece of heating capacity information in the target heating capacity information set has a corresponding sampling time. The determining unit is used to determine the heating attenuation index based on the target heating capacity information set; the heating attenuation index defines the degree of attenuation of the heating capacity of the heat exchanger during the preset time period. The instruction generation unit is used to generate a defrost instruction when it is determined that the heating attenuation index is greater than a preset attenuation threshold. The defrost instruction is used to trigger the outdoor unit condenser of the air conditioner to perform a defrost operation. The step of determining the heating capacity attenuation index based on the target heating capacity information set includes: For each heat capacity information in the target heat capacity information set, the first heat capacity information and the second heat capacity information are compared to determine the corresponding heat capacity difference; the first sampling time corresponding to the first heat capacity information is adjacent to the second sampling time corresponding to the second heat capacity information. Based on the differences in heating capacity described above, the heating capacity attenuation index is determined; The step of determining the heating attenuation index based on the differences in heating capacity includes: For each of the aforementioned heating capacity differences, the rate of change of heating capacity is determined based on the heating capacity difference and the corresponding sampling time interval; the sampling time interval is the difference between the first sampling time and the second sampling time. The heating capacity attenuation index is determined based on the rate of change of each of the stated heating capacities. By summarizing the various rates of change in heating capacity, the final determined heating capacity attenuation index can balance the errors at different sampling times, ensuring that the determined heating capacity attenuation index accurately reflects the true degree of attenuation of the heat exchanger's heating capacity.
6. An air conditioner, characterized in that, include: Outdoor unit, including condenser; Heat exchanger; Controller; The controller is used to execute the defrosting control method for the outdoor unit condenser as described in any one of claims 1-4.
7. An air conditioner, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the defrosting control method for the outdoor unit condenser as described in any one of claims 1-4 through the computer program.