An outdoor unit defrosting control method, device, storage medium and electronic device

Abstract

The present application provides an outdoor unit defrosting control method, device, storage medium and electronic device. During the execution of the defrosting logic, when the first temperature currently detected by the first defrosting sensor is not less than the preset temperature threshold and the second temperature currently detected by the second defrosting sensor is less than the preset temperature threshold, the opening degree of the first electronic expansion valve is controlled to be closed by N1 steps; when the first temperature currently detected by the first defrosting sensor is less than the preset temperature threshold and the second temperature currently detected by the second defrosting sensor is not less than the preset temperature threshold, the opening degree of the second electronic expansion valve is controlled to be closed by N2 steps. It can be seen that in the solution of the present application, when one of the defrosting sensors of the upper and lower heat exchangers meets the defrosting exit condition and the other does not, the opening degree of the electronic expansion valve of the heat exchanger that meets the defrosting exit condition is closed, so that the refrigerant flow rate of the heat exchanger that has not reached the defrosting exit condition increases, thereby accelerating the defrosting speed and efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioner control, and particularly relates to an outdoor unit defrosting control method and device, a storage medium, and an electronic device. Background Art

[0002] When an air conditioner operates in the heating mode, frost will form on the outdoor unit of the air conditioner. If not dealt with in time, it will affect the heating effect of the air conditioner. Therefore, it is necessary to defrost the outdoor unit.

[0003] In the prior art, after the outdoor unit of the air conditioner enters the defrosting mode, the opening degrees of the two electronic expansion valves of the outdoor unit are in the fully open state, and a preset defrosting logic is executed. When both the upper and lower heat exchangers meet the defrosting exit conditions, that is, when the temperatures currently detected by the defrosting sensors of the upper and lower heat exchangers are not less than the preset temperature threshold, the defrosting mode is exited.

[0004] The inventor found through research that during the defrosting process, due to the uneven frosting or inconsistent defrosting speed of the upper and lower heat exchangers when the outdoor unit generates heat and forms frost, if the two electronic expansion valves are always kept in the fully open state, it will lead to a slow defrosting speed and low efficiency. Summary of the Invention

[0005] The present application provides an outdoor unit defrosting control method and device, a storage medium, and an electronic device, aiming to solve the problem of slow defrosting speed and low efficiency of the existing outdoor unit.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] An outdoor unit defrosting control method includes:

[0008] When the defrosting condition is met, control the opening degrees of the first electronic expansion valve and the second electronic expansion valve to be in the fully open state, and execute a preset defrosting logic; wherein, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger of the outdoor unit, and the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger of the outdoor unit;

[0009] Obtain the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; the first defrosting sensor is arranged in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is arranged in the lower heat exchanger of the outdoor unit;

[0010] When the first temperature is not less than the preset temperature threshold and the second temperature is less than the preset temperature threshold, control the opening of the first electronic expansion valve to close by N1 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, N1 is a positive integer, and N1 is determined based on the first temperature and the second temperature;

[0011] When the first temperature is less than the preset temperature threshold and the second temperature is not less than the preset temperature threshold, control the opening of the second electronic expansion valve to close by N2 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, N2 is a positive integer, and N2 is determined based on the first temperature and the second temperature.

[0012] The above method, optionally, further includes:

[0013] When the first temperature is not less than the preset temperature value and the second temperature is not less than the preset temperature value, execute the preset defrosting exit logic.

[0014] The above method, optionally, the controlling the opening of the first electronic expansion valve to close by N1 steps includes:

[0015] Calculate the difference between the first temperature and the second temperature to obtain a first temperature difference;

[0016] Based on the first temperature difference and a preset first value, obtain a first step value;

[0017] Judge whether the first step value is less than a preset second value;

[0018] If the first step value is less than the preset second value, then use the preset second value as N1; if the first step value is not less than the preset second value, then use the first step value as N1;

[0019] Control the opening of the first electronic expansion valve to close the N1 steps.

[0020] The above method, optionally, the controlling the opening of the second electronic expansion valve to close by N2 steps includes:

[0021] Calculate the difference between the second temperature and the first temperature to obtain a second temperature difference;

[0022] Based on the second temperature difference and the preset first value, obtain a second step value;

[0023] Judge whether the second step value is less than the preset second value;

[0024] If the value in the second step is less than the preset second value, then use the preset second value as N2; if the value in the second step is not less than the preset second value, then use the value in the second step as N2;

[0025] Control the opening degree of the second electronic expansion valve to close the N2 steps.

[0026] An outdoor unit defrosting control device includes:

[0027] A first execution unit, configured to control the opening degrees of a first electronic expansion valve and a second electronic expansion valve to be fully open when defrosting conditions are met, and execute a preset defrosting logic; wherein, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger of the outdoor unit, and the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger of the outdoor unit;

[0028] An acquisition unit, configured to acquire a first temperature currently detected by a first defrosting sensor and a second temperature currently detected by a second defrosting sensor; the first defrosting sensor is arranged in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is arranged in the lower heat exchanger of the outdoor unit;

[0029] A first control unit, configured to control the opening degree of the first electronic expansion valve to close N1 steps and return to execute the step of acquiring the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor when the first temperature is not less than a preset temperature threshold and the second temperature is less than the preset temperature threshold; wherein, the N1 is a positive integer, and the N1 is determined based on the first temperature and the second temperature;

[0030] A second control unit, configured to control the opening degree of the second electronic expansion valve to close N2 steps and return to execute the step of acquiring the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor when the first temperature is less than a preset temperature threshold and the second temperature is not less than the preset temperature threshold; wherein, the N2 is a positive integer, and the N2 is determined based on the first temperature and the second temperature.

[0031] For the above-mentioned device, optionally, it further includes:

[0032] A second execution unit, configured to execute a preset defrosting exit logic when the first temperature is not less than a preset temperature value and the second temperature is not less than the preset temperature value.

[0033] For the above-mentioned device, optionally, when the first control unit controls the opening degree of the first electronic expansion valve to close N1 steps, it specifically is used for:

[0034] Calculate the difference between the first temperature and the second temperature to obtain a first temperature difference;

[0035] Based on the first temperature difference and a preset first value, obtain a first step value;

[0036] Determine whether the first step value is less than a preset second value;

[0037] If the first step value is less than the preset second value, use the preset second value as N1; if the first step value is not less than the preset second value, use the first step value as N1;

[0038] Control the opening degree of the first electronic expansion valve to close it by N1 steps.

[0039] For the above device, optionally, when the second control unit controls the opening degree of the second electronic expansion valve to close it by N2 steps, it is specifically used for:

[0040] Calculate the difference between the second temperature and the first temperature to obtain a second temperature difference;

[0041] Based on the second temperature difference and the preset first value, obtain a second step value;

[0042] Determine whether the second step value is less than the preset second value;

[0043] If the second step value is less than the preset second value, use the preset second value as N2; if the second step value is not less than the preset second value, use the second step value as N2;

[0044] Control the opening degree of the second electronic expansion valve to close it by N2 steps.

[0045] A storage medium stores an instruction set, and when the instruction set is executed by a processor, the above-described outdoor unit defrosting control method is implemented.

[0046] An electronic device includes:

[0047] A memory for storing at least one set of instruction sets;

[0048] A processor for executing the instruction sets stored in the memory and implementing the above-described outdoor unit defrosting control method by executing the instruction sets.

[0049] Compared with the prior art, the present application has the following advantages:

[0050] The present application provides an outdoor unit defrosting control method, device, storage medium and electronic device. During the execution of the defrosting logic, when the first temperature currently detected by the first defrosting sensor is not less than the preset temperature threshold and the second temperature currently detected by the second defrosting sensor is less than the preset temperature threshold, the opening degree of the first electronic expansion valve is controlled to be closed by N1 steps to reduce the refrigerant flow rate of the upper heat exchanger and increase the refrigerant flow rate of the lower heat exchanger, thereby accelerating the defrosting speed of the lower heat exchanger; when the first temperature currently detected by the first defrosting sensor is less than the preset temperature threshold and the second temperature currently detected by the second defrosting sensor is not less than the preset temperature threshold, the opening degree of the second electronic expansion valve is controlled to be closed by N2 steps to reduce the refrigerant flow rate of the lower heat exchanger and increase the refrigerant flow rate of the upper heat exchanger, thereby accelerating the defrosting speed of the upper heat exchanger. It can be seen that in the solution of the present application, when one of the defrosting sensors of the upper and lower heat exchangers meets the defrosting exit condition and the other does not, the opening degree of the electronic expansion valve of the heat exchanger that meets the defrosting exit condition is closed, so that the refrigerant flow rate of the heat exchanger that has not reached the defrosting exit condition increases, thereby accelerating the defrosting speed and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0052] Figure 1 It is a schematic structural diagram of an outdoor unit system provided by the present application;

[0053] Figure 2 It is a method flow chart of an outdoor unit defrosting control method provided by the present application;

[0054] Figure 3 It is another method flow chart of an outdoor unit defrosting control method provided by the present application;

[0055] Figure 4 It is another method flow chart of an outdoor unit defrosting control method provided by the present application;

[0056] Figure 5 It is a schematic structural diagram of an outdoor unit defrosting control device provided by the present application;

[0057] Figure 6 It is a schematic structural diagram of an electronic device provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0059] As used herein, the term "including" and its variations are open-ended, that is, "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0060] It should be noted that the concepts such as "first" and "second" mentioned in the disclosure of the present application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0061] It should be noted that the modifications of "one" and "multiple" mentioned in the disclosure of the present application are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly stated in the context, it should be understood as "one or more".

[0062] The present application can be used in many general or special computing device environments or configurations. For example: personal computers, server computers, handheld devices or portable devices, tablet devices, multi-processor devices, distributed computing environments including any of the above devices or equipment, and so on.

[0063] Refer to Figure 1 , the embodiments of the present application provide an external unit system diagram, specifically including:

[0064] The upper heat exchanger (i.e., the upper heat exchanger), the first electronic expansion valve PWV1, the lower heat exchanger (i.e., the lower heat exchanger), and the second electronic expansion valve PWV2.

[0065] Among them, TOCI1 represents the inlet temperature of the upper heat exchanger, and TOCI2 represents the inlet temperature of the lower heat exchanger.

[0066] Among them, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger, and the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger.

[0067] Among them, Tdef1 represents the temperature detected by the defrosting sensor of the upper heat exchanger, and Tdef2 represents the temperature detected by the defrosting sensor of the lower heat exchanger.

[0068] Refer toFigure 2 , a defrosting control method for an outdoor unit provided by the present application specifically includes the following steps:

[0069] S201. When the defrosting condition is met, control the opening degrees of the first electronic expansion valve and the second electronic expansion valve to be fully open, and execute a preset defrosting logic.

[0070] In this embodiment, when the defrosting condition is met, control the opening degrees of the first electronic expansion valve and the second electronic expansion valve to be fully open, and execute a preset defrosting logic, that is, enter the defrosting mode.

[0071] Among them, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger of the outdoor unit, and the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger of the outdoor unit.

[0072] It should be noted that the preset defrosting logic is an existing defrosting logic. For the process of executing the preset defrosting logic, please refer to the prior art and will not be elaborated here.

[0073] S202. Obtain the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor.

[0074] In this embodiment, obtain the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor. Among them, the first defrosting sensor is arranged in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is arranged in the lower heat exchanger of the outdoor unit.

[0075] Specifically, obtain the temperature currently detected by the first defrosting sensor arranged in the upper heat exchanger, and determine the temperature currently detected by the first defrosting sensor in the upper heat exchanger as the first temperature. Obtain the temperature currently detected by the lower heat exchanger, and determine the temperature currently detected by the second defrosting sensor in the lower heat exchanger as the second temperature.

[0076] S203. Judge whether the first temperature is less than a preset temperature threshold. If not, execute S204; if so, execute S205.

[0077] In this embodiment, judging whether the first temperature is less than a preset temperature threshold is to judge whether the upper heat exchanger does not meet the defrosting exit condition.

[0078] It should be noted that the preset temperature threshold is a temperature value set manually and can be adjusted according to different actual application environments and frosting degrees.

[0079] S204. Judge whether the second temperature is less than a preset temperature threshold. If not, execute S206; if so, execute S207.

[0080] In this embodiment, if the first temperature is not less than the preset temperature threshold, that is, the upper heat exchanger meets the defrost exit condition, it is further determined whether the second temperature is less than the preset temperature threshold, that is, it is determined whether the lower heat exchanger does not meet the defrost exit condition.

[0081] S205. Determine whether the second temperature is less than the preset temperature threshold. If so, execute S202; if not, execute S208.

[0082] In this embodiment, if the first temperature is less than the preset temperature threshold, that is, the upper heat exchanger does not meet the defrost exit condition, it is further determined whether the second temperature is less than the preset temperature threshold, that is, it is determined whether the lower heat exchanger does not meet the defrost exit condition.

[0083] In this embodiment, if the second temperature is less than the preset temperature threshold, it means that the lower heat exchanger also does not meet the defrost exit condition, and the process returns to execute step S202.

[0084] In this embodiment, if the second temperature is not less than the preset temperature threshold, it means that the lower heat exchanger meets the defrost exit condition, and step S208 is executed.

[0085] S206. Execute the preset defrost exit logic.

[0086] In this embodiment, if the second temperature is not less than the preset temperature threshold, that is, the lower heat exchanger meets the defrost exit condition, the preset defrost exit logic is executed, that is, the defrost mode is exited.

[0087] In other words, when the first temperature is not less than the preset temperature value and the second temperature is not less than the preset temperature value, that is, when both the upper heat exchanger and the lower heat exchanger meet the defrost exit condition, the preset defrost exit logic is executed.

[0088] It should be noted that the preset defrost exit logic is an existing logic and will not be elaborated here.

[0089] S207. Control the opening of the first electronic expansion valve to close by N1 steps and return to execute S202.

[0090] In this embodiment, if the second temperature is less than the preset temperature threshold, that is, the lower heat exchanger does not meet the defrost exit condition, control the opening of the first electronic expansion valve to close by N1 steps and return to execute step S202. Here, N1 is a positive integer and N1 is determined based on the first temperature and the second temperature.

[0091] In this embodiment, after controlling the opening of the first electronic expansion valve to close by N1 steps, the refrigerant flow rate of the upper heat exchanger decreases, so that the refrigerant flow rate of the lower heat exchanger increases, accelerating the defrosting speed of the lower heat exchanger.

[0092] Refer to Figure 3, the process of controlling the opening degree of the first electronic expansion valve to close by N1 steps specifically includes the following steps:

[0093] S301. Calculate the difference between the first temperature and the second temperature to obtain the first temperature difference.

[0094] In this embodiment, by calculating the difference between the first temperature and the second temperature to obtain the first temperature difference, the first temperature can be represented by Tdef1, the second temperature can be represented by Tdef2, and the first temperature difference = Tdef1 - Tdef2.

[0095] S302. Based on the first temperature difference and a preset first value, obtain the first step value.

[0096] In this embodiment, based on the first temperature difference and the preset first value, to obtain the first step value, specifically, calculate the product of the first temperature difference and the preset first value to obtain the first step value. Preferably, the preset first value can be 50.

[0097] S303. Determine whether the first step value is less than a preset second value. If so, execute S304; if not, execute S305.

[0098] In this embodiment, to determine whether the first step value is less than the preset second value, preferably, the preset second value is 150.

[0099] S304. Take the preset second value as N1.

[0100] In this embodiment, if the first step value is less than the preset second value, then take the preset second value as N1. That is to say, the minimum value of N1 is the preset second value.

[0101] S305. Take the first step value as N1.

[0102] In this embodiment, if the first step value is not less than the preset second value, then take the first step value as N1.

[0103] S306. Control the opening degree of the first electronic expansion valve to close by N1 steps.

[0104] In this embodiment, control the opening degree of the first electronic expansion valve to close by N1 steps.

[0105] In the method provided by the embodiment of the present application, when the upper heat exchanger meets the defrost exit condition, but the lower heat exchanger does not meet the defrost exit condition, by adjusting the opening degree of the first electronic expansion valve to make the opening degree of the first electronic expansion valve smaller, thereby reducing the refrigerant flow rate of the upper heat exchanger to increase the refrigerant flow rate of the lower heat exchanger, and further improving the defrosting speed and efficiency.

[0106] S208. Control the opening degree of the second electronic expansion valve to close by N2 steps, and return to execute S202.

[0107] In this embodiment, if the second temperature is not less than the preset temperature threshold, that is, the lower heat exchanger meets the defrosting exit condition, control the opening degree of the second electronic expansion valve to close by N2 steps, and return to execute step S202. Wherein, N2 is a positive integer, and N2 is determined based on the first temperature and the second temperature.

[0108] In this embodiment, after controlling the opening degree of the second electronic expansion valve to close by N2 steps, the refrigerant flow rate of the lower heat exchanger decreases, so that the refrigerant flow rate of the upper heat exchanger increases, and the defrosting speed of the upper heat exchanger is accelerated.

[0109] Refer to Figure 4 , the process of controlling the opening degree of the second electronic expansion valve to close by N2 steps specifically includes the following steps:

[0110] S401. Calculate the difference between the second temperature and the first temperature to obtain the second temperature difference.

[0111] In this embodiment, calculate the difference between the second temperature and the first temperature to obtain the second temperature difference. The first temperature can be represented by Tdef1, the second temperature can be represented by Tdef2, and the second temperature difference = Tdef2 - Tdef1.

[0112] S402. Based on the second temperature difference and the preset first value, obtain the second step value.

[0113] In this embodiment, based on the second temperature difference and the preset first value, obtain the second step value. Specifically, calculate the product of the second temperature difference and the preset first value to obtain the second step value.

[0114] S403. Determine whether the second step value is less than the preset second value. If so, execute S404; if not, execute S405.

[0115] In this embodiment, determine whether the second step value is less than the preset second value.

[0116] S404. Take the preset second value as N2.

[0117] In this embodiment, if the second step value is less than the preset second value, take the preset second value as N2, that is, the minimum value of N2 is the preset second value.

[0118] S405. Take the second step value as N2.

[0119] In this embodiment, if the second step value is not less than the preset second value, take the second step value as N2.

[0120] S406. Control the opening degree of the second electronic expansion valve to close it by N2 steps.

[0121] In this embodiment, control the opening degree of the second electronic expansion valve to close it by N1 steps.

[0122] In the method provided by the embodiment of the present application, when the upper heat exchanger does not meet the defrost exit condition, but the lower heat exchanger meets the defrost exit condition, by adjusting the opening degree of the second electronic expansion valve to close the opening degree of the second electronic expansion valve, thereby reducing the refrigerant flow rate of the lower heat exchanger to increase the refrigerant flow rate of the upper heat exchanger, and further improving the defrost speed and efficiency.

[0123] In the outdoor unit defrost control method provided by the embodiment of the present application, during the execution of the defrost logic, when the first temperature currently detected by the first defrost sensor is not less than the preset temperature threshold and the second temperature currently detected by the second defrost sensor is less than the preset temperature threshold, control the opening degree of the first electronic expansion valve to close it by N1 steps to reduce the refrigerant flow rate of the upper heat exchanger and increase the refrigerant flow rate of the lower heat exchanger, thereby accelerating the defrost speed of the lower heat exchanger; when the first temperature currently detected by the first defrost sensor is less than the preset temperature threshold and the second temperature currently detected by the second defrost sensor is not less than the preset temperature threshold, control the opening degree of the second electronic expansion valve to close it by N2 steps to reduce the refrigerant flow rate of the lower heat exchanger and increase the refrigerant flow rate of the upper heat exchanger, thereby accelerating the defrost speed of the upper heat exchanger. It can be seen that in the solution of the present application, when one of the defrost sensors of the upper and lower heat exchangers meets the defrost exit condition and the other does not, close the opening degree of the electronic expansion valve of the heat exchanger that meets the defrost exit condition, so that the refrigerant flow rate of the heat exchanger that has not reached the defrost exit condition increases, and further accelerates the defrost speed and efficiency.

[0124] It should be noted that although the operations are depicted in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. In certain environments, multitasking and parallel processing may be beneficial.

[0125] It should be understood that the various steps recorded in the method implementation manner disclosed in the present application can be executed in different orders and / or in parallel. In addition, the method implementation manner may include additional steps and / or omit the steps shown. The scope of the present application disclosed is not limited in this regard.

[0126] Corresponding to Figure 1 the method described above, the embodiment of the present application further provides an outdoor unit defrost control device for Figure 1 the specific implementation of the method in Figure 5 as shown, specifically including:

[0127] The first execution unit 501 is configured to, when the defrosting condition is met, control the opening degrees of the first electronic expansion valve and the second electronic expansion valve to be fully open states, and execute a preset defrosting logic; wherein, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger of the outdoor unit, and the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger of the outdoor unit;

[0128] The acquisition unit 502 is configured to acquire a first temperature currently detected by the first defrosting sensor and a second temperature currently detected by the second defrosting sensor; the first defrosting sensor is disposed in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is disposed in the lower heat exchanger of the outdoor unit;

[0129] The first control unit 503 is configured to, when the first temperature is not less than a preset temperature threshold and the second temperature is less than the preset temperature threshold, control the opening degree of the first electronic expansion valve to be closed by N1 steps, and return to execute the step of acquiring the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the N1 is a positive integer, and the N1 is determined based on the first temperature and the second temperature;

[0130] The second control unit 504 is configured to, when the first temperature is less than a preset temperature threshold and the second temperature is not less than the preset temperature threshold, control the opening degree of the second electronic expansion valve to be closed by N2 steps, and return to execute the step of acquiring the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the N2 is a positive integer, and the N2 is determined based on the first temperature and the second temperature.

[0131] In the outdoor unit defrosting control device provided by the embodiment of the present application, when one of the defrosting sensors of the upper and lower heat exchangers meets the defrosting exit condition and the other does not, the opening degree of the electronic expansion valve of the heat exchanger that meets the defrosting exit condition is closed, so that the refrigerant flow rate of the heat exchanger that has not reached the defrosting exit condition increases, thereby accelerating the defrosting speed and efficiency.

[0132] In an embodiment of the present application, based on the foregoing solution, it can also be configured as:

[0133] The second execution unit is configured to execute a preset defrosting exit logic when the first temperature is not less than a preset temperature value and the second temperature is not less than the preset temperature value.

[0134] In an embodiment of the present application, based on the foregoing solution, when the first control unit 503 controls the opening degree of the first electronic expansion valve to be closed by N1 steps, it is specifically configured to:

[0135] Calculate the difference between the first temperature and the second temperature to obtain a first temperature difference;

[0136] Based on the first temperature difference and a preset first value, obtain a first step value;

[0137] Determine whether the first step value is less than a preset second value;

[0138] If the first step value is less than the preset second value, then use the preset second value as N1; if the first step value is not less than the preset second value, then use the first step value as N1;

[0139] Control the opening degree of the first electronic expansion valve to close by N1 steps.

[0140] In an embodiment of the present application, based on the foregoing solution, when the second control unit 504 controls the opening degree of the second electronic expansion valve to close by N2 steps, it specifically is used for:

[0141] Calculate the difference between the second temperature and the first temperature to obtain a second temperature difference;

[0142] Based on the second temperature difference and the preset first value, obtain a second step value;

[0143] Determine whether the second step value is less than the preset second value;

[0144] If the second step value is less than the preset second value, then use the preset second value as N2; if the second step value is not less than the preset second value, then use the second step value as N2;

[0145] Control the opening degree of the second electronic expansion valve to close by N2 steps.

[0146] The embodiment of the present application further provides a storage medium, and the storage medium stores an instruction set, wherein the following operations are performed when the instruction set runs:

[0147] When the defrosting condition is satisfied, execute a preset defrosting logic;

[0148] Obtain a first temperature currently detected by a first defrosting sensor and a second temperature currently detected by a second defrosting sensor; the first defrosting sensor is arranged in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is arranged in the lower heat exchanger of the outdoor unit;

[0149] When the first temperature is not less than a preset temperature threshold and the second temperature is less than the preset temperature threshold, control the opening degree of the first electronic expansion valve to close by N1 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger, N1 is a positive integer, and N1 is determined based on the first temperature and the second temperature;

[0150] When the first temperature is less than the preset temperature threshold and the second temperature is not less than the preset temperature threshold, control the opening degree of the second electronic expansion valve to close by N2 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger, N2 is a positive integer, and N2 is determined based on the first temperature and the second temperature.

[0151] An embodiment of the present application further provides an electronic device, and its structural schematic diagram is as Figure 6 shown, specifically including a memory 601 for storing at least one set of instruction sets; a processor 602 for executing the instruction sets stored in the memory, and implementing the following operations by executing the instruction sets:

[0152] When the defrosting condition is satisfied, execute a preset defrosting logic;

[0153] Obtain the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; the first defrosting sensor is arranged in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is arranged in the lower heat exchanger of the outdoor unit;

[0154] When the first temperature is not less than the preset temperature threshold and the second temperature is less than the preset temperature threshold, control the opening degree of the first electronic expansion valve to close by N1 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger, N1 is a positive integer, and N1 is determined based on the first temperature and the second temperature;

[0155] When the first temperature is less than the preset temperature threshold and the second temperature is not less than the preset temperature threshold, control the opening of the second electronic expansion valve to close by N2 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger, N2 is a positive integer, and N2 is determined based on the first temperature and the second temperature.

[0156] Although the subject matter has been described in language specific to structural features and / or methodological acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. On the contrary, the specific features and acts described above are merely example forms of implementing the claims.

[0157] Although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the disclosure of the present application. Certain features described in the context of separate embodiments can also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment can also be implemented separately or in any suitable sub-combination in multiple embodiments.

[0158] The above description is only a preferred embodiment of the disclosure of the present application and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosure concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. An outdoor unit defrosting control method, characterized in that, Including: When the defrosting condition is met, control the opening degrees of the first electronic expansion valve and the second electronic expansion valve to be fully open, and execute a preset defrosting logic; wherein, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger of the outdoor unit, and the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger of the outdoor unit; Obtain the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; the first defrosting sensor is arranged in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is arranged in the lower heat exchanger of the outdoor unit; When the first temperature is not less than a preset temperature threshold and the second temperature is less than the preset temperature threshold, control the opening degree of the first electronic expansion valve to be closed by N1 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the N1 is a positive integer, and the N1 is determined based on the first temperature and the second temperature; the control of closing the opening degree of the first electronic expansion valve by N1 steps includes: calculating the difference between the first temperature and the second temperature to obtain a first temperature difference; obtaining a first step value based on the first temperature difference and a preset first value; judging whether the first step value is less than a preset second value; if the first step value is less than the preset second value, then use the preset second value as N1; if the first step value is not less than the preset second value, then use the first step value as N1; control the opening degree of the first electronic expansion valve to be closed by the N1 steps; When the first temperature is less than a preset temperature threshold and the second temperature is not less than the preset temperature threshold, control the opening degree of the second electronic expansion valve to be closed by N2 steps, and return to execute the step of obtaining the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, the N2 is a positive integer, and the N2 is determined based on the first temperature and the second temperature; the control of closing the opening degree of the second electronic expansion valve by N2 steps includes: calculating the difference between the second temperature and the first temperature to obtain a second temperature difference; obtaining a second step value based on the second temperature difference and the preset first value; judging whether the second step value is less than the preset second value; if the second step value is less than the preset second value, then use the preset second value as N2; if the second step value is not less than the preset second value, then use the second step value as N2; control the opening degree of the second electronic expansion valve to be closed by the N2 steps.

2. The method according to claim 1, characterized in that, It further includes: When the first temperature is not less than a preset temperature value and the second temperature is not less than the preset temperature value, execute a preset defrosting exit logic.

3. An outdoor unit defrosting control device, characterized in that, Including: The first execution unit is used to control the opening degrees of the first electronic expansion valve and the second electronic expansion valve to be fully open when the defrosting condition is met, and execute a preset defrosting logic; wherein, the first electronic expansion valve is used to control the refrigerant flow rate of the upper heat exchanger of the outdoor unit, and the second electronic expansion valve is used to control the refrigerant flow rate of the lower heat exchanger of the outdoor unit; The acquisition unit is used to acquire the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; the first defrosting sensor is arranged in the upper heat exchanger of the outdoor unit, and the second defrosting sensor is arranged in the lower heat exchanger of the outdoor unit; The first control unit is used to control the opening degree of the first electronic expansion valve to be closed by N1 steps when the first temperature is not less than the preset temperature threshold and the second temperature is less than the preset temperature threshold, and return to execute the step of acquiring the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, N1 is a positive integer, and N1 is determined based on the first temperature and the second temperature; when the first control unit controls the opening degree of the first electronic expansion valve to be closed by N1 steps, it specifically is used for: calculating the difference between the first temperature and the second temperature to obtain a first temperature difference; obtaining a first step value based on the first temperature difference and a preset first value; judging whether the first step value is less than a preset second value; if the first step value is less than the preset second value, using the preset second value as N1; if the first step value is not less than the preset second value, using the first step value as N1; controlling the opening degree of the first electronic expansion valve to be closed by the N1 steps; The second control unit is used to control the opening degree of the second electronic expansion valve to be closed by N2 steps when the first temperature is less than the preset temperature threshold and the second temperature is not less than the preset temperature threshold, and return to execute the step of acquiring the first temperature currently detected by the first defrosting sensor and the second temperature currently detected by the second defrosting sensor; wherein, N2 is a positive integer, and N2 is determined based on the first temperature and the second temperature; when the second control unit controls the opening degree of the second electronic expansion valve to be closed by N2 steps, it specifically is used for: calculating the difference between the second temperature and the first temperature to obtain a second temperature difference; obtaining a second step value based on the second temperature difference and the preset first value; judging whether the second step value is less than the preset second value; if the second step value is less than the preset second value, using the preset second value as N2; if the second step value is not less than the preset second value, using the second step value as N2; controlling the opening degree of the second electronic expansion valve to be closed by the N2 steps.

4. The device according to claim 3, characterized in that, It further includes: The second execution unit is used to execute a preset defrosting exit logic when the first temperature is not less than the preset temperature value and the second temperature is not less than the preset temperature value.

5. A storage medium, characterized in that, The storage medium stores an instruction set, wherein when the instruction set is executed by a processor, it implements the outdoor unit defrosting control method according to any one of claims 1-2.

6. An electronic device, characterized in that, It includes: A memory for storing at least one set of instruction sets; A processor for executing the instruction sets stored in the memory and implementing the outdoor unit defrosting control method according to any one of claims 1-2 by executing the instruction sets.

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