Defrosting control method and device for outdoor unit condenser and air conditioner

Abstract

The invention discloses a defrosting control method and device for an outdoor unit condenser and an air conditioner, and relates to the technical field of air conditioner heating. The defrosting control method for the outdoor unit condenser comprises the steps that a target heating capacity information set of a heat exchanger of the air conditioner corresponding to a preset time period is obtained, each piece of heating capacity information in the target heating capacity information set has a corresponding sampling moment; according to the target heating capacity information set, a heating attenuation index is determined; the heating attenuation index defines the attenuation degree of the heating capacity of the heat exchanger in a preset time period; and when it is determined that the heating attenuation index is larger than the preset attenuation threshold value, a defrosting instruction is generated, and the defrosting instruction is used for triggering an outdoor unit condenser of the air conditioner to conduct defrosting operation. Therefore, the frosting state of the condenser can be detected more quickly, the situation that defrosting operation is carried out only when the condenser is seriously frosted is avoided, and the energy-saving performance and the heating performance of the air conditioning unit are optimized.

Description

Technical Field

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

[0002] When the air conditioner is heating in winter, the temperature of the outdoor unit condenser is low and its surface is prone to frost. The condenser needs to be defrosted to ensure the heating effect of the air conditioner.

[0003] At present, the temperature is generally detected by a defrost temperature sensor arranged in the outdoor unit condenser, and the defrost operation is triggered when a low temperature is detected.

[0004] However, when the condenser is frosted, the defrost temperature sensor is wrapped by frost and snow, which has a certain heat preservation performance, so that the defrost temperature sensor cannot reflect the frosting condition of the outdoor unit condenser well, resulting in the defrosting operation being performed only when the condenser is seriously frosted. At this time, the defrosting operation of the condenser will require a large amount of air conditioning heating and power, making it impossible to ensure the energy-saving performance and heating performance of the air conditioning unit.

[0005] In response to the above problems, the industry has not yet proposed a better technical solution. Summary of the invention

[0006] The present application provides a defrost control method and device for an outdoor unit condenser, an air conditioner and a computer-readable storage medium, which are used to at least solve the defect in the prior art that the air conditioner detects and triggers the defrost operation based on a defrost temperature sensor, resulting in the defrost operation being performed only when the degree of frost on the condenser is serious, causing the energy-saving performance and heating performance of the air conditioning unit to be seriously reduced.

[0007] The present application provides a defrost control method for an outdoor unit condenser, the method comprising: obtaining a target heating amount information set of a heat exchanger of an air conditioner corresponding to a preset time period, each heating amount information in the target heating amount information set having a corresponding sampling time; determining a heating attenuation index according to the target heating amount information set; the heating attenuation index defines the degree of attenuation of the heating amount of the heat exchanger in the preset time period; and generating a defrost instruction when it is determined that the heating attenuation index is greater than a preset attenuation threshold, the defrost instruction being used to trigger the outdoor unit condenser of the air conditioner to perform a defrost operation.

[0008] According to a defrost control method for an outdoor unit condenser provided in the present application, the target heating amount information set of the heat exchanger of the air conditioner corresponding to a preset time period is obtained, including: obtaining a plurality of heat exchange fluid temperature differences corresponding to consecutive sampling moments in the preset time period; each of the heat exchange fluid temperature differences has a corresponding sampling moment, 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 heat exchanger of the air conditioner, 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 of the heat exchange fluid temperature differences, the heating amount information of the heat exchanger is correspondingly determined based on the heat exchange fluid temperature difference; and the target heating amount information set is determined according to each of the heating amount information.

[0009] According to a defrost control method for an outdoor unit condenser provided in the present application, the heating capacity information of the heat exchanger is determined accordingly based on the heat exchange fluid temperature difference for each of the heat exchange fluid temperature differences, including: for each of the heat exchange fluid temperature differences, determining the heating capacity information corresponding to the heat exchange fluid temperature difference based on a preset heating capacity relationship; the heating capacity relationship defines a calculation relationship between the heat exchange fluid temperature difference and the heating capacity.

[0010] According to a defrost control method for an outdoor unit condenser provided in the present application, the heating attenuation index is determined according to the target heating amount information set, including: for each heating amount information in the target heating amount information set, the first heating amount information is compared with the second heating amount information to determine the corresponding heating amount difference; the first sampling moment corresponding to the first heating amount information is adjacent to the second sampling moment corresponding to the second heating amount information; and the heating attenuation index is determined according to each of the heating amount differences.

[0011] According to a defrost control method for an outdoor unit condenser provided in the present application, the heating attenuation index is determined according to each of the heating amount differences, including: for each of the heating amount differences, determining the heating amount change rate according to the heating amount difference and a corresponding sampling time interval; the sampling time interval is the difference between the first sampling moment and the second sampling moment; and determining the heating attenuation index according to each of the heating amount change rates.

[0012] According to a defrost control method for an outdoor unit condenser provided in the present application, when it is determined that the heating attenuation index is greater than a preset attenuation threshold, a defrost instruction is generated, including: when it is determined that the heating attenuation index is greater than the preset attenuation threshold, determining a target defrost intensity corresponding to the heating attenuation index according to a preset defrost intensity model; the defrost intensity model defines the relationship between the heating attenuation index and the defrost intensity; and generating a defrost instruction according to the target defrost intensity, the defrost instruction being used to trigger the outdoor unit condenser to perform a defrost operation corresponding to the target defrost intensity.

[0013] According to a defrost control method for an outdoor unit condenser provided in the present application, the method of obtaining a target heating amount information set of a heat exchanger of an air conditioner corresponding to a preset time period includes: collecting a first heating amount information set of the heat exchanger corresponding to a first preset time period; detecting whether there is an air conditioner gear adjustment operation within the preset time period; the air conditioner gear adjustment operation instructs the user to adjust the heating gear of the air conditioner; and when it is determined that there is no air conditioner gear adjustment operation, determining the target heating amount information set according to the first heating amount information set.

[0014] According to a defrost control method for an outdoor unit condenser provided in the present application, after detecting whether there is an air-conditioning gear adjustment operation within the preset time period, the method further includes: when it is determined that there is the air-conditioning gear adjustment operation, clearing the first heating amount information set, and re-collecting the second heating amount information set of the heat exchanger corresponding to the second preset time period; the second preset time period and the first preset time period correspond to the same time interval; and determining the target heating amount information set based on the second heating amount information set.

[0015] The present application also provides a defrost control device for an outdoor unit condenser, the device comprising: an acquisition unit, used to acquire a target heating amount information set of the heat exchanger of the air conditioner corresponding to a preset time period, each heating amount information in the target heating amount information set having a corresponding sampling time; a determination unit, used to determine a heating attenuation index according to the target heating amount information set; the heating attenuation index defines the degree of attenuation of the heating amount of the heat exchanger in the preset time period; an instruction generation unit, 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 being used to trigger the outdoor unit condenser of the air conditioner to perform a defrost operation.

[0016] The present application also provides an air conditioner, comprising: an outdoor unit including a condenser; a heat exchanger; and a controller; wherein the controller is used to execute any of the above-mentioned defrost control methods for the outdoor unit condenser.

[0017] The present application also provides an air conditioner, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute and implement any of the above-mentioned defrost control methods for an outdoor unit condenser through the computer program.

[0018] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, wherein when the program is run, it executes and implements any of the above-mentioned defrost control methods for the outdoor unit condenser.

[0019] The present application also provides a computer program product, including a computer program, wherein when the computer program is executed by a processor, the defrost control method for an outdoor unit condenser as described in any one of the above is implemented.

[0020] The defrost control method, device and air conditioner of the outdoor unit condenser provided in the present application, when the condenser of the air conditioner is frosted, the heating capacity of the air conditioning unit will be correspondingly attenuated to a certain extent. By obtaining the target heating capacity information set of the heat exchanger in a preset time period, and analyzing the attenuation degree of the heating capacity of the exchanger in the preset time period, a defrost instruction is generated when it is detected that the heating attenuation index is too large. Compared with the defrost temperature sensor, the frosting state of the condenser can be detected more quickly, avoiding the defrost operation when the condenser is severely frosted. The defrost operation will not occupy too much heating capacity and power of the air conditioner, thereby optimizing the energy-saving performance and heating performance of the air conditioning unit, and can continuously ensure the user experience in the heating mode of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 is a hardware environment schematic diagram of a defrost control method for an outdoor unit condenser according to an embodiment of the present application;

[0024] Figure 2 A structural block diagram showing an example of an air conditioner to which the defrost control method for an outdoor unit condenser according to an embodiment of the present application is applied;

[0025] Figure 3 A flowchart showing an example of a defrosting control method for an outdoor unit condenser according to an embodiment of the present application is shown;

[0026] Figure 4 A flowchart showing an example of a defrosting control method for an outdoor unit condenser according to an embodiment of the present invention;

[0027] Figure 5 Shown according to Figure 3 An exemplary operation flow chart of step S310 in FIG.

[0028] Figure 6 A structural block diagram showing an example of a defrost control device for an outdoor unit condenser according to an embodiment of the present application is shown;

[0029] Figure 7 A structural block diagram of an example of an air conditioner according to an embodiment of the present application is shown;

[0030] Figure 8 It is a structural schematic diagram of the air conditioner provided in this application. DETAILED DESCRIPTION

[0031] In order 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] According to one aspect of an embodiment of the present application, a defrost control method for an outdoor unit condenser is provided. The defrost control method for an outdoor unit condenser is widely used in smart home, smart home, smart home device ecology, smart residential (Intelligence House) ecology and other whole-house intelligent digital control application scenarios. Optionally, in this embodiment, the defrost control method for an outdoor unit condenser can be applied to Figure 1In the hardware environment shown in FIG. 1 , a terminal device 102 (eg, air conditioner) and a server 104 are provided. Figure 1 As shown, the server 104 is connected to the terminal device 102 via a network, and can be used to provide services (such as application services, etc.) for the terminal or a client installed on the terminal. A database can be set on the server or independently of the server to provide data storage services for the server 104. Cloud computing and / or edge computing services can be configured on the server or independently of the server to provide data computing services for the server 104.

[0034] The above network may include but is not limited to at least one of the following: wired network, wireless network. The above wired network may include but is not limited to at least one of the following: wide area network, metropolitan area network, local area network, and the above wireless network may include but is not limited to at least one of the following: WIFI (Wireless Fidelity), Bluetooth.

[0035] Figure 2 A structural block diagram of an example of an air conditioner suitable for applying the defrost control method for an outdoor unit condenser according to an embodiment of the present 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 pipelines. A compressor 215, a condenser 211 and a defrost temperature sensor 213 are provided in the outdoor unit 210. The heat exchanger 230 can adopt various non-restrictive heat exchange units, such as a water-fluorine heat exchanger, so that the refrigerant in the pipeline of the outdoor unit 210 and the heat exchange medium (e.g., water) in the pipeline of the indoor unit 220 can exchange heat in the heat exchanger 230 through water inlet and outlet. In an exemplary heating cycle, the refrigerant enters the outdoor unit condenser 211 from the compressor 215 through a throttling device, and then enters the heat exchanger 230 for heat exchange, and flows back to the compressor 215 through valve control to form a complete heating cycle.

[0037] Figure 3 A flowchart of an example of a defrosting control method for an outdoor unit condenser according to an embodiment of the present application is shown. The implementing subject of the method of the embodiment of the present application can be various processors or controllers with processing or computing capabilities, and can be set in an air-conditioning terminal, such as an indoor unit, through local data processing, and can also integrate data communication with the server to achieve the goal of timely monitoring the frosting state of the outdoor unit condenser and quickly defrosting the outdoor unit condenser, thereby ensuring the stability of the air-conditioning heating performance and energy-saving performance, and ensuring the comfort experience of indoor users in the air-conditioning heating mode.

[0038] like Figure 3As shown, in step S310, a target heating amount information set of the heat exchanger of the air conditioner corresponding to a preset time period is obtained, and each heating amount information in the target heating amount information set has a corresponding sampling time.

[0039] Here, the preset time period may represent a preset determination period or calculation window, which includes two or more sampling moments.

[0040] In one example of the embodiment of the present invention, a calorimeter is provided for the heat exchanger to detect the heating capacity outputted by the heat exchanger at different sampling times. In another example of the embodiment of the present invention, at each sampling time, the temperature rise value of the heat exchange fluid by the heat exchanger is detected, and the corresponding heating capacity is obtained by conversion.

[0041] In step S320, a heating attenuation index is determined according to the target heating amount information set, where the heating attenuation index defines the degree of attenuation of the heating amount of the heat exchanger in a preset time period.

[0042] In one example of an embodiment of the present invention, the target heating information corresponding to a later sampling moment in the target heating information set is compared with the target heating information corresponding to an earlier sampling moment to determine the heating attenuation index. In another example of an embodiment of the present invention, the average fluctuation amplitude of the heating information of the heat exchanger in a preset time period is identified based on the heating information set to determine the heating attenuation index.

[0043] In step S330, when it is determined that the heating attenuation index is greater than the preset attenuation threshold, a defrost instruction is generated, and the defrost instruction 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 on the low-pressure side and is therefore prone to frost. After the condenser is frosted, the heat exchange on the evaporation side is affected, so its heating performance will also be attenuated, and the severity of the condenser frosting will directly affect the heating capacity of the air-conditioning unit. According to this working principle, in an embodiment of the present invention, by detecting the degree of attenuation of the heating capacity of the heat exchanger of the air-conditioning unit within a certain period of time, it is determined whether to trigger the defrosting operation. Compared with the defrosting temperature sensor, the frosting state of the condenser can be detected more quickly, avoiding the defrosting operation when the condenser is severely frosted. The defrosting operation will not occupy too much air-conditioning heating capacity and power, effectively ensuring the energy-saving performance and heating performance of the air-conditioning unit, and can continuously ensure the user experience in the air-conditioning heating mode.

[0045] Figure 4 A flowchart showing an example of a defrost 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, a plurality of heat exchange fluid temperature differences corresponding to consecutive sampling moments in the preset time period are obtained, each heat exchange fluid temperature difference has a corresponding sampling moment, 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 a heat exchange medium (e.g., water) used to exchange heat for the fluid in the indoor unit pipeline or a refrigerant (e.g., Freon) used to exchange heat for the fluid in the outdoor unit pipeline, and is not limited here.

[0048] Here, the heat exchange fluid inlet temperature refers to the temperature of the heat exchange fluid flowing in from the inlet of the heat exchanger 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, for each heat exchange fluid temperature difference, heating capacity information of the heat exchanger is determined based on the heat exchange fluid temperature difference.

[0050] In some embodiments, temperature sensors are provided at the water inlet and outlet of the heat exchanger to detect the temperature difference of the water entering and leaving the heat exchanger. Specifically, for each heat exchange fluid temperature difference, the heating capacity information corresponding to the heat exchange fluid temperature difference is determined based on a preset heating capacity relationship. Here, the heating capacity relationship defines the calculation relationship between the heat exchange fluid temperature difference and the heating capacity.

[0051] For example, according to the heat calculation formula Q = c 水 m△T shows that when the system water flow m is constant, the outlet water temperature T of the heat exchanger is detected. o and water inlet temperature T i , the heating capacity Q of the air conditioning unit and the inlet and outlet water temperature difference △T (△T=T o -T i ), so △T can be used as a direct basis for judging the heating performance of the system.

[0052] In step S430, a target heating amount information set is determined according to each heating amount information.

[0053] Therefore, the heating amount information of the heat exchanger at a plurality of different sampling moments is summarized through the target heating amount information set.

[0054] In step S440, for each heating amount information in the target heating amount information set, the first heating amount information is compared with the second heating amount information to determine a corresponding heating amount difference.

[0055] Here, the first sampling time corresponding to the first heating amount information is adjacent to the second sampling time corresponding to the second heating amount information.

[0056] In one example of an embodiment of the present invention, the heating amount information can be directly represented by the heat unit Q, that is, the first heating amount information Q1 corresponds to the first sampling time t1, the second heating amount information Q2 corresponds to the second sampling time t2, and t1 and t2 are adjacent sampling times. In another example of an embodiment of the present invention, due to the proportional relationship between the heat information and the temperature difference information, △T can also be directly used to represent the heating amount information, that is, the first heating amount information △T1 corresponds to the first sampling time t1, and the second heating amount information △T2 corresponds to the second sampling time t2.

[0057] In step S450, for each heating amount difference, the heating amount change rate is determined according to the heating amount difference and a corresponding sampling time interval, where the sampling time interval is the difference between the first sampling moment and the second sampling moment.

[0058] It should be noted that when the outdoor unit condenser is frosted, its heat exchange performance will be affected, resulting in the inevitable decrease in the heating capacity of the air-conditioning unit. This will be reflected in the inlet and outlet water temperature difference △T of the unit, and the difference will gradually decrease. Therefore, the rate of change of △T (i.e., the rate of change of the inlet and outlet water temperature difference) can be used as the heating capacity change rate, as a condition for whether to defrost.

[0059] Specifically, the change rate of the inlet and outlet water temperature difference per unit time δ is calculated by the following method: △T :

[0060] δ △T =(△T t2 -△T t1 ) / △t formula (1)

[0061] Among them, δ △t ℃ / min can be used as the unit of measurement, △T t2 is the inlet and outlet water temperature difference at sampling time t2, △T t1 is the inlet and outlet water temperature difference at the previous sampling time t1, △t=t2-t1.

[0062] When the △t time interval, δ △t When >α, it means that the temperature difference change rate at time t2 is higher than that at time t1, and the heating capacity of the air-conditioning unit is greatly attenuated.

[0063] In step S460, a heating attenuation index is determined according to the heating amount change rates.

[0064] Here, by summarizing the different heating capacity change rates, the heating attenuation index finally determined can balance the errors at different sampling times, ensuring that the determined heating attenuation index more accurately reflects the actual attenuation degree of the heating capacity of the heat exchanger. Exemplarily, the inlet and outlet water temperature difference of a continuous time period (for example, 5 minutes) is selected, and the corresponding cumulative average value is calculated, and this is used as the basis for determining the heating attenuation index. Thus, the heating performance attenuation of the air-conditioning unit is determined according to the change rate of the inlet and outlet water temperature difference, and this is used as the basis for determining whether to perform a defrost operation.

[0065] In step S470, when it is determined that the heating decay index is greater than the preset decay threshold, a target defrost intensity corresponding to the heating decay index is determined according to a preset defrost intensity model.

[0066] Here, the defrost intensity model defines the relationship between the heating attenuation index and the defrost intensity, which can be pre-calibrated by the tester. For example, the relationship between the heating attenuation index and the defrost intensity is a positive correlation, that is, the greater the heating attenuation index, the greater the heating performance attenuation of the air-conditioning unit, and the more serious the frosting of the air-conditioning outdoor unit, and the need to increase the defrost intensity accordingly.

[0067] In step S480, a defrost instruction is generated according to the target defrost intensity, and the defrost instruction 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 it is determined that the heating attenuation index is large, the corresponding defrost intensity is determined based on the heating attenuation index, so that the defrost intensity of the defrost operation can match the degree of frost on the air-conditioning outdoor unit. While achieving rapid defrosting, it can also reduce the occupancy of system resources, effectively ensuring the energy-saving performance and heating performance of the air-conditioning unit, and continuously ensuring the user experience in the air-conditioning heating mode.

[0069] Figure 5 Shown according to Figure 3 An example operation flow chart of step S310 in FIG.

[0070] like Figure 5 As shown, in step S510, a first heating amount information set of the heat exchanger corresponding to a first preset time period is collected.

[0071] In step S520, it is detected whether there is an air conditioner gear adjustment operation within a preset time period, and the air conditioner gear adjustment operation indicates that the user adjusts the heating gear of the air conditioner.

[0072] Exemplarily, the air conditioner operation log is called to identify whether there is an air conditioner gear adjustment record within a preset time period of the sampling operation.

[0073] In step S531, when it is determined that there is no air-conditioning gear adjustment operation, a target heating amount information set is determined according to the first heating amount information set.

[0074] In step S533, when it is determined that there is an air-conditioning gear adjustment operation, the first heating amount information set is cleared, and the second heating amount information set of the heat exchanger corresponding to the second preset time period is recollected.

[0075] In step S540, a target heating amount information set is determined according to the second heating amount information set.

[0076] It should be noted that the user's adjustment of the heating gear, such as raising or lowering the heating gear, will generally trigger a change in the heating amount under normal circumstances, which belongs to the normal heating adjustment process, and the heating amount change corresponding to the gear adjustment should not be used to measure the heating attenuation index. Through the embodiment of the present invention, after sampling multiple heat information for a period of time for the heat exchanger, it is also necessary to detect whether there is a gear shift operation information of the heat exchanger during this period of time. If not, this heat information is used to calculate the corresponding heating attenuation index. If so, it is necessary to re-collect the heat information to ensure that the sampled heating amount information corresponds to the same gear, to ensure the high accuracy of the obtained heating attenuation index, and to avoid the judgment deviation of the frosting state of the outdoor unit caused by human gear operation.

[0077] The defrost control device for the outdoor unit condenser provided in the present application is described below. The defrost control device for the outdoor unit condenser described below and the defrost control method for the outdoor unit condenser described above can be referenced to each other.

[0078] Figure 6 A structural block diagram of an example of a defrost control device for an outdoor unit condenser according to an embodiment of the present application is shown.

[0079] like Figure 6 As shown, the defrost 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 amount information set of a heat exchanger of the air conditioner corresponding to a preset time period, wherein each heating amount information in the target heating amount information set has a corresponding sampling time.

[0081] The determination unit 620 is configured to determine a heating attenuation index according to the target heating amount information set; the heating attenuation index defines a degree of attenuation of the heating amount of the heat exchanger in the preset time period.

[0082] The instruction generating 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, wherein 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 of an air conditioner according to an embodiment of the present 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. Through the controller 730, the defrosting control method for the outdoor unit condenser as described above can be implemented, and the same or similar technical effects as the above method embodiment can be achieved. For more details, please refer to the above combined Figure 1-5 The relevant description in will not be repeated here.

[0085] Figure 8 An example of a physical structure diagram of an air conditioner is shown in FIG. Figure 8 As shown, the air conditioner may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820 and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the defrosting control method for the outdoor unit condenser, the method comprising: obtaining 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, the indoor ambient temperature is the temperature of the environment where the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; based on a preset superheat setting model, determining the initial superheat corresponding to the outdoor ambient temperature; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; correcting the initial superheat according to the temperature deviation value between the indoor ambient temperature and the indoor unit air outlet temperature to determine the target superheat of the electronic expansion valve.

[0086] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. 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 disk or an optical disk.

[0087] On the other hand, the present application also provides a computer program product, which includes a computer program, which can be stored on a computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the defrost control method of the outdoor unit condenser provided by the above-mentioned methods, the method including: obtaining the outdoor ambient temperature, the indoor unit outlet temperature and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment in which the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment in which the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; based on a preset superheat setting model, determining an initial superheat corresponding to the outdoor ambient temperature; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; correcting the initial superheat according to the temperature deviation value between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.

[0088] On the other hand, the present application also provides a computer-readable storage medium, the computer-readable storage medium includes a stored program, wherein the program, when running, executes the defrost control method of the outdoor unit condenser provided by the above-mentioned methods, the method including: obtaining the outdoor ambient temperature, the indoor unit outlet temperature and the indoor ambient temperature; the outdoor ambient temperature is the temperature of the environment in which the outdoor unit of the air conditioner is located, the indoor ambient temperature is the temperature of the environment in which the indoor unit of the air conditioner is located, and the indoor unit includes an electronic expansion valve; based on a preset superheat setting model, determining an initial superheat corresponding to the outdoor ambient temperature; the superheat setting model defines the relationship between the outdoor ambient temperature and the initial superheat; correcting the initial superheat according to the temperature deviation value between the indoor ambient temperature and the indoor unit outlet temperature to determine the target superheat of the electronic expansion valve.

[0089] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0090] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for 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 some parts of the embodiments.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application 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 embodiments of the present application.

Claims

1. A defrosting control method for an outdoor unit condenser, characterized in that: The method comprises: Obtain a target heating amount information set of the heat exchanger of the air conditioner corresponding to a preset time period, wherein each heating amount information in the target heating amount information set has a corresponding sampling time; Determining a heating attenuation index according to the target heating amount information set; the heating attenuation index defines the degree of attenuation of the heating amount of the heat exchanger in the preset time period; When it is determined that the heating attenuation index is greater than a preset attenuation threshold, a defrost instruction is generated, where the defrost instruction is used to trigger a defrost operation of an outdoor unit condenser of the air conditioner.

2. The defrosting control method for an outdoor unit condenser according to claim 1, characterized in that: The step of obtaining a target heating amount information set of a heat exchanger of the air conditioner corresponding to a preset time period includes: Acquire a plurality of heat exchange fluid temperature differences corresponding to consecutive sampling moments in the preset time period; each of the heat exchange fluid temperature differences has a corresponding sampling moment, 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 inlet of the heat exchanger of the air conditioner, and the heat exchange fluid outlet temperature represents the temperature of the heat exchange fluid flowing out of the outlet of the heat exchanger; For each of the heat exchange fluid temperature differences, determining heating capacity information of the heat exchanger based on the heat exchange fluid temperature difference; The target heating amount information set is determined according to each of the heating amount information.

3. The defrosting control method for an 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 the heat exchange fluid for each of the temperature differences of the heat exchange fluids comprises: For each of the heat exchange fluid temperature differences, the heating amount information corresponding to the heat exchange fluid temperature difference is determined based on a preset heating amount relationship; the heating amount relationship defines a calculation relationship between the heat exchange fluid temperature difference and the heating amount.

4. The defrosting control method for an outdoor unit condenser according to claim 1, characterized in that: Determining the heating attenuation index according to the target heating amount information set includes: For each heating amount information in the target heating amount information set, the first heating amount information is compared with the second heating amount information to determine a corresponding heating amount difference; a first sampling time corresponding to the first heating amount information is adjacent to a second sampling time corresponding to the second heating amount information; A heating attenuation index is determined according to each of the heating amount differences.

5. The defrosting control method for an outdoor unit condenser according to claim 4, characterized in that: Determining the heating attenuation index according to each of the heating amount differences includes: For each heating amount difference, determining the heating amount change rate according to the heating amount difference and a corresponding sampling time interval; the sampling time interval is the difference between the first sampling moment and the second sampling moment; A heating attenuation index is determined according to each of the heating amount change rates.

6. The defrosting control method for an outdoor unit condenser according to claim 1, characterized in that: The generating of a defrost instruction when it is determined that the heating attenuation index is greater than a preset attenuation threshold comprises: When it is determined that the heating attenuation index is greater than a preset attenuation threshold, a target defrost intensity corresponding to the heating attenuation index is determined according to a preset defrost intensity model; the defrost intensity model defines a relationship between the heating attenuation index and the defrost intensity; A defrost instruction is generated according to the target defrost intensity, and the defrost instruction is used to trigger the outdoor unit condenser to perform a defrost operation corresponding to the target defrost intensity.

7. The defrosting control method for an outdoor unit condenser according to claim 1, characterized in that: The step of obtaining a target heating amount information set of a heat exchanger of the air conditioner corresponding to a preset time period includes: Collecting a first heating amount information set of the heat exchanger corresponding to a first preset time period; Detecting whether there is an air conditioner gear adjustment operation within the preset time period; the air conditioner gear adjustment operation indicates the user's adjustment of the heating gear of the air conditioner; When it is determined that there is no air-conditioning gear adjustment operation, the target heating amount information set is determined according to the first heating amount information set.

8. The defrosting control method for an outdoor unit condenser according to claim 7, characterized in that: After detecting whether there is an air conditioner gear adjustment operation within the preset time period, the method further includes: When it is determined that the air conditioner gear adjustment operation exists, the first heating amount information set is cleared, and a second heating amount information set corresponding to a second preset time period of the heat exchanger is recollected; the second preset time period and the first preset time period correspond to the same time interval; The target heating amount information set is determined according to the second heating amount information set.

9. A defrost control device for an outdoor unit condenser, characterized in that: The device comprises: An acquisition unit, used to acquire a target heating amount information set of a heat exchanger of the air conditioner corresponding to a preset time period, wherein each heating amount information in the target heating amount information set has a corresponding sampling time; A determination unit, configured to determine a heating attenuation index according to the target heating amount information set; the heating attenuation index defines a degree of attenuation of the heating amount of the heat exchanger in the preset time period; The instruction generating unit is used to generate a defrost instruction when it is determined that the heating attenuation index is greater than a preset attenuation threshold, wherein the defrost instruction is used to trigger the outdoor unit condenser of the air conditioner to perform a defrost operation.

10. An air conditioner, characterized in that: include: The outdoor unit, including the condenser; Heat exchangers; Controller; Wherein, the controller is used to execute the defrost control method for the outdoor unit condenser as described in any one of claims 1-8.

11. An air conditioner, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the defrost control method for the outdoor unit condenser according to any one of claims 1 to 8 through the computer program.

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