Defrosting control method for air conditioner heating and air conditioner

Abstract

The application provides a defrosting control method for air conditioner heating and an air conditioner. The defrosting control method comprises the following steps: S1, the air conditioner enters a defrosting mode, and an outdoor fan stops running; S2, a rotating speed S of the outdoor fan is acquired in real time; S3, whether the rotating speed S of the outdoor fan is greater than a rotating speed setting value S of the outdoor fan is judged 设 , and a duration t is greater than a first preset time length t 预1 ; if yes, step S4 is entered; if no, step S5 is entered; S4, a first defrosting mode is entered; S5, a second defrosting mode is entered; wherein a defrosting time first threshold value t 化霜1 of the first defrosting mode is greater than a defrosting time second threshold value t 化霜2 of the second defrosting mode. The defrosting control method for air conditioner heating is associated with steps S1-S5 and cannot be separated. When natural wind blows through an outdoor heat exchanger, the defrosting effect can still be ensured, and the defrosting is not incomplete, and reliability problems are avoided.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and more specifically, to a defrosting control method for air conditioning heating and an air conditioner. Background Technology

[0002] When an air conditioner is in heating mode, the outdoor heat exchanger will frost over in low-temperature, high-humidity outdoor conditions. When the frost layer reaches a certain thickness, it will affect the heating effect and even reliability, thus requiring defrosting. Current inverter air conditioners generally use a four-way valve to switch directions, stopping the indoor and outdoor fans to defrost the outdoor unit's condenser. When the frost on the outdoor unit's condenser is completely melted, the outdoor unit's surface temperature will rise. By sampling the outdoor unit's surface temperature, it can be determined whether the frost has completely melted, and defrosting will then cease, resuming heating.

[0003] However, to avoid excessively long defrosting times, insufficient room heat, and excessive temperature drops, a maximum defrosting time is usually set. Once this time is exceeded, defrosting will stop even if the outdoor condenser temperature has not reached the defrosting termination temperature. In most scenarios, defrosting can be completed within the maximum defrosting time. However, when the outdoor temperature is very low, and natural wind blows across the outdoor condenser, it quickly carries away the heat from defrosting, resulting in poor defrosting performance and preventing defrosting from completing within the maximum time. Ultimately, frost accumulates, causing reliability issues.

[0004] In view of this, the present invention is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to propose a defrosting control method and air conditioner for air conditioning heating, in order to solve the problem in the prior art that when the outdoor heat exchanger defrosts during air conditioning heating operation, the outdoor temperature is very low, and natural wind blows over the outdoor condenser, which quickly carries away the defrosting heat, resulting in poor defrosting effect, failure to complete defrosting within the longest defrosting time, and ultimately frost accumulation, causing poor reliability.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A defrosting control method for air conditioner heating, the defrosting control method for air conditioner heating includes the following steps:

[0008] S1. The air conditioner enters defrost mode, and the outdoor fan stops running;

[0009] S2. Real-time acquisition of the outdoor fan speed S;

[0010] S3. Determine if the outdoor fan speed S > the outdoor fan speed setpoint S. 设 And the duration t is greater than the first preset duration t 预1 If yes, proceed to step S4; otherwise, proceed to step S5.

[0011] S4. Enter the first defrost mode;

[0012] S5, Enter the second defrost mode;

[0013] Among them, the first threshold value t is the defrosting time for the first exit from defrosting mode. 化霜1 >Second threshold for defrosting time before exiting defrosting mode 化霜2 .

[0014] The defrosting control method for air conditioning heating described in this invention comprises steps S1 to S5, which are interconnected and inseparable. Step S1 enters the defrosting mode, and the outdoor fan stops running. Steps S2 and S3 acquire the outdoor fan speed S in real time and determine whether the outdoor fan speed S > the outdoor fan speed setpoint S. 设 And the duration t is greater than the first preset duration t 预1 If the outdoor fan speed S ≤ the outdoor fan speed set value S 设 Or the outdoor fan speed S > the outdoor fan speed setpoint S 设 But the duration t ≤ the first preset duration t 预1 If either of these conditions indicates that no natural wind is blowing across the outdoor heat exchanger, then proceed to step S5 to enter the second defrosting mode exit. The defrosting effect is guaranteed, and the defrosting cycle is still controlled according to the original maximum defrosting time. If the outdoor fan speed S > the outdoor fan speed set value S... 设 And the duration t is greater than the first preset duration t 预1 If there is natural wind blowing across the outdoor heat exchanger, then proceed to step S4 to enter the first defrost mode exit. The defrost time for the first defrost mode exit is the first threshold t. 化霜1 >Second threshold for defrosting time before exiting defrosting mode 化霜2 This extends the defrosting time to the maximum extent and ensures the reliability of defrosting.

[0015] Furthermore, step S4 includes the following steps:

[0016] S41, Obtain the defrosting time t1;

[0017] S42. Determine whether the defrosting time t1 is greater than the first threshold t for defrosting time. 化霜1 If so, then exit the defrosting process;

[0018] Alternatively, step S4 may include the following steps:

[0019] S41. Obtain the outdoor heat exchanger's external plate temperature T. 外盘1 ;

[0020] S42. Determine if the outer plate temperature is T. 外盘1 >Defrosting Exit Temperature First Threshold T 化霜1 And continue for the second preset duration t 预2If so, then exit the frosting process.

[0021] This setting ensures effective defrosting when natural wind blows across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0022] Furthermore, step S5 includes the following steps:

[0023] S51, Obtain the defrosting time t2;

[0024] S52. Determine whether the defrosting time t2 is greater than the second threshold t for defrosting time. 化霜2 If so, then exit the defrosting process;

[0025] Alternatively, step S5 may include the following steps:

[0026] S51, Obtain the outdoor heat exchanger's outer plate temperature T 外盘2 ;

[0027] S52, Determine if the outer plate temperature is T 外盘2 >Second threshold temperature for defrosting exit T 化霜2 And continue for the third preset duration t 预3 If so, then exit the frosting process.

[0028] This setting ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0029] Furthermore, the outdoor fan speed setpoint S 设 The value range is [80, 120], and the outdoor fan speed setting value S 设 The value range is RPM.

[0030] Outdoor fan speed setpoint S 设 The value is set within the above range to facilitate the determination of whether there is natural wind blowing across the outdoor heat exchanger.

[0031] Furthermore, the first threshold for defrosting time t 化霜1 The value range is [15, 25], and the first threshold for defrosting time is t. 化霜1 The range of values ​​for is min.

[0032] First threshold for defrosting time t 化霜1 The value is set within the above range to ensure defrosting effect when there is natural wind blowing over the outdoor heat exchanger, and to avoid reliability problems caused by incomplete defrosting.

[0033] Furthermore, the second threshold for defrosting time t 化霜2 The value range is [4, 14], and the second threshold for defrosting time t 化霜2 The range of values ​​for is min.

[0034] Second threshold for defrosting time t 化霜2 Setting the value within the above range ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0035] Furthermore, the first preset duration t 预 The value of 1 is in the range of [2, 5], and the first preset duration t 预1 The range of values ​​for is min.

[0036] First preset duration t 预1 The value is set within the above range to facilitate the determination of whether there is natural wind blowing across the outdoor heat exchanger.

[0037] Furthermore, the first threshold temperature T for defrosting exit 化霜1 The value range is [8, 18], and the first threshold temperature T for defrosting exit is... 化霜1 The value range is ℃.

[0038] The first threshold temperature for defrosting exit T 化霜1 The value is set within the above range to ensure defrosting effect when there is natural wind blowing over the outdoor heat exchanger, and to avoid reliability problems caused by incomplete defrosting.

[0039] Furthermore, the second threshold temperature T for defrosting exit 化霜2 The value range is [8, 18], and the second threshold T for defrosting exit temperature is... 化霜2 The value range is ℃.

[0040] The second threshold temperature for defrosting exit T 化霜2 Setting the value within the above range ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0041] In a second aspect, the present invention provides an air conditioner comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises an outdoor fan and an outdoor heat exchanger, and the air conditioner uses a defrosting control method for air conditioning heating as described in any one of the present invention.

[0042] Compared with the prior art, the defrosting control method and air conditioner for air conditioning heating described in this invention have the following beneficial effects:

[0043] 1) The defrosting control method and air conditioner for air conditioning heating described in this invention are interconnected and inseparable in steps S1 to S5. Step S1 enters the defrosting mode, and the outdoor fan stops running. Steps S2 and S3 are used to obtain the outdoor fan speed S in real time and determine whether the outdoor fan speed S > the outdoor fan speed set value S_set and the duration t > the first preset duration t_pre1. If the outdoor fan speed S ≤ the outdoor fan speed set value S_set or the outdoor fan speed S > the outdoor fan speed set value S_set but the duration t ≤ the first preset duration t_pre1, then... If there is no natural wind blowing over the outdoor heat exchanger, proceed to step S5 to enter the second defrost exit mode. The defrosting effect is guaranteed, and the defrosting cycle is still controlled according to the original maximum defrosting time. If the outdoor fan speed S > the outdoor fan speed setting value S_set and the duration t > the first preset duration t_preset1, it means that there is natural wind blowing over the outdoor heat exchanger. Then proceed to step S4 to enter the first defrost exit mode. The first defrosting time threshold t_defrost1 of the first defrost exit mode is greater than the second defrosting time threshold t_defrost2 of the second defrost exit mode, extending the maximum defrosting time to ensure defrosting reliability.

[0044] 2) The defrosting control method and air conditioner for air conditioning heating described in this invention, steps S1 to S5 are interconnected and inseparable. This is achieved by detecting whether the outdoor fan speed S > the outdoor fan speed setpoint S. 设 And continue for the first preset duration t 预1 This allows the air conditioner to switch between different defrosting modes depending on the presence or absence of natural wind. On the one hand, it ensures effective defrosting, saves energy, and avoids reliability issues caused by incomplete defrosting. On the other hand, it facilitates precise control of the air conditioner, further saving energy. Attached Figure Description

[0045] Figure 1 This is a schematic flowchart of a defrosting control method for air conditioning heating according to an embodiment of the present invention. Detailed Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The descriptions of "first," "second," etc., mentioned in the embodiments of the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0047] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] Example 1

[0049] This embodiment proposes a defrosting control method for air conditioning heating, such as... Figure 1 As shown, the defrosting control method for air conditioning heating includes the following steps:

[0050] S1. The air conditioner enters defrost mode, and the outdoor fan stops running;

[0051] S2. Real-time acquisition of the outdoor fan speed S;

[0052] S3. Determine if the outdoor fan speed S > the outdoor fan speed setpoint S. 设 And the duration t is greater than the first preset duration t 预1 If yes, proceed to step S4; otherwise, proceed to step S5.

[0053] S4. Enter the first defrost mode;

[0054] S5, Enter the second defrost mode;

[0055] Among them, the first threshold value t is the defrosting time for the first exit from defrosting mode. 化霜1 >Second threshold for defrosting time before exiting defrosting mode 化霜2 .

[0056] The defrosting control method for air conditioning heating described in this embodiment has steps S1 to S5 that are interconnected and inseparable. Step S1 enters the defrosting mode, and the outdoor fan stops running. Steps S2 and S3 obtain the outdoor fan speed S in real time and determine whether the outdoor fan speed S is greater than the outdoor fan speed set value S. 设 And the duration t is greater than the first preset duration t 预1 If the outdoor fan speed S ≤ the outdoor fan speed set value S 设 Or the outdoor fan speed S > the outdoor fan speed setpoint S 设 But the duration t ≤ the first preset duration t 预1 If either of these conditions indicates that no natural wind is blowing across the outdoor heat exchanger, then proceed to step S5 to enter the second defrosting mode exit. The defrosting effect is guaranteed, and the defrosting cycle is still controlled according to the original maximum defrosting time. If the outdoor fan speed S > the outdoor fan speed set value S... 设 And the duration t is greater than the first preset duration t 预1 If there is natural wind blowing across the outdoor heat exchanger, then proceed to step S4 to enter the first defrost mode exit. The defrost time for the first defrost mode exit is the first threshold t. 化霜1 >Second threshold for defrosting time before exiting defrosting mode 化霜2 This extends the defrosting time to the maximum extent and ensures the reliability of defrosting.

[0057] The defrosting control method for air conditioning heating described in this embodiment has steps S1 to S5 that are interconnected and inseparable. Even when natural wind blows across the outdoor heat exchanger, the defrosting effect can still be guaranteed, avoiding reliability issues caused by incomplete defrosting.

[0058] The defrosting control method for air conditioning heating described in this embodiment has steps S1 to S5 that are interconnected and inseparable. This is achieved by detecting whether the outdoor fan speed S is greater than the outdoor fan speed setpoint S. 设 And continue for the first preset duration t 预1 This allows the air conditioner to switch between different defrosting modes depending on the presence or absence of natural wind. On the one hand, it ensures effective defrosting, saves energy, and avoids incomplete defrosting that could lead to reliability issues. On the other hand, it facilitates precise control of the air conditioner, further saving energy.

[0059] Specifically, step S4 includes the following steps:

[0060] S41, Obtain the defrosting time t1;

[0061] S42. Determine whether the defrosting time t1 is greater than the first threshold t for defrosting time. 化霜1 If so, then exit the defrosting process;

[0062] Alternatively, step S4 may include the following steps:

[0063] S41. Obtain the outdoor heat exchanger's external plate temperature T. 外盘1 ;

[0064] S42. Determine if the outer plate temperature is T. 外盘1 >Defrosting Exit Temperature First Threshold T 化霜1 And continue for the second preset duration t 预2 If so, then exit the frosting process.

[0065] This setting ensures effective defrosting when natural wind blows across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0066] Specifically, step S5 includes the following steps:

[0067] S51, Obtain the defrosting time t2;

[0068] S52. Determine whether the defrosting time t2 is greater than the second threshold t for defrosting time. 化霜2 If so, then exit the defrosting process;

[0069] Alternatively, step S5 may include the following steps:

[0070] S51, Obtain the outdoor heat exchanger's outer plate temperature T 外盘2 ;

[0071] S52, Determine if the outer plate temperature is T外盘2 >Second threshold temperature for defrosting exit T 化霜2 And continue for the third preset duration t 预3 If so, then exit the frosting process.

[0072] This setting ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0073] Specifically, the outdoor fan speed setpoint S 设 The range of values ​​for is not specifically limited.

[0074] More specifically, the outdoor fan speed setpoint S 设 The value range is [80, 120], and the outdoor fan speed setting value S 设 The outdoor fan speed setting value S can be any value from [80, 120]. 设 The unit is RPM.

[0075] Outdoor fan speed setpoint S 设 The value is set within the above range to facilitate the determination of whether there is natural wind blowing across the outdoor heat exchanger.

[0076] Preferably, in this embodiment, the outdoor fan speed setpoint S 设 The value is 100 RPM.

[0077] This setting helps determine whether there is natural wind blowing across the outdoor heat exchanger.

[0078] Specifically, the first threshold for defrosting time t 化霜1 The range of values ​​for is not specifically limited.

[0079] More specifically, the first threshold for defrosting time t 化霜1 The value range is [15, 25], and the first threshold for defrosting time is t. 化霜1 The defrosting time can take any value from [15, 25], and the first threshold t is used. 化霜1 The unit is min.

[0080] First threshold for defrosting time t 化霜1 The value is set within the above range to ensure defrosting effect when there is natural wind blowing over the outdoor heat exchanger, and to avoid reliability problems caused by incomplete defrosting.

[0081] Preferably, in this embodiment, the first threshold value for defrosting time t 化霜1 The value is 20min.

[0082] This setting ensures effective defrosting when natural wind blows across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0083] Specifically, the second threshold for defrosting time t 化霜2 The range of values ​​for is not specifically limited.

[0084] More specifically, the second threshold for defrosting time t 化霜2 The value range is [4, 14], and the second threshold for defrosting time t 化霜2 The second threshold t for defrosting time can be any value in [4, 14]. 化霜2 The unit is min.

[0085] Second threshold for defrosting time t 化霜2 Setting the value within the above range ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0086] Preferably, in this embodiment, the second threshold value t for defrosting time 化霜1 The value is 9min.

[0087] This setting ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0088] Specifically, the first preset duration t 预1 The range of values ​​for is not specifically limited.

[0089] More specifically, the first preset duration t 预1 The value range is [2, 5], and the first preset duration t 预1 It can take any value from [2, 5], with the first preset duration t. 预1 The unit is min.

[0090] First preset duration t 预1 The value is set within the above range to facilitate the determination of whether there is natural wind blowing across the outdoor heat exchanger.

[0091] Preferably, in this embodiment, the first preset duration t 预1 The value is 3min.

[0092] This setting helps determine whether there is natural wind blowing across the outdoor heat exchanger.

[0093] Specifically, the second preset duration t 预2 The range of values ​​for is not specifically limited.

[0094] More specifically, the second preset duration t 预2 The value range is [20, 40], and the second preset duration t 预2 It can take any value from [20, 40], and the second preset duration t 预2 The unit is s.

[0095] Preferably, in this embodiment, the second preset duration t 预2 The value is 30s.

[0096] Specifically, the third preset duration t 预3 The range of values ​​for is not specifically limited.

[0097] More specifically, the third preset duration t 预3 The value range is [20, 40], and the third preset duration t 预3 It can take any value from [20, 40], and the third preset duration t 预3 The unit is s.

[0098] Preferably, in this embodiment, the third preset duration t 预3 The value is 30s.

[0099] Specifically, the first threshold temperature T for defrosting exit 化霜1 The range of values ​​for is not specifically limited.

[0100] More specifically, the first threshold temperature T for defrosting exit 化霜1 The value range is [8, 18], and the first threshold temperature T for defrosting exit is... 化霜1 The value can be any one of [8, 18], and the defrost exit temperature is the first threshold T. 化霜1 The unit is ℃.

[0101] The first threshold temperature for defrosting exit T 化霜1 The value is set within the above range to ensure defrosting effect when there is natural wind blowing over the outdoor heat exchanger, and to avoid reliability problems caused by incomplete defrosting.

[0102] Preferably, in this embodiment, the defrosting exit temperature is a first threshold T. 化霜1 The value is 13℃.

[0103] This setting ensures effective defrosting when natural wind blows across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0104] Specifically, the second threshold temperature T for defrosting exit 化霜2 The range of values ​​for is not specifically limited.

[0105] More specifically, the second threshold temperature T for defrosting exit 化霜2 The value range is [8, 18], and the second threshold T for defrosting exit temperature is... 化霜2 The value can be any one of [8, 18], and the second threshold T for defrosting exit temperature is [T]. 化霜2 The unit is ℃.

[0106] The second threshold temperature for defrosting exit T 化霜2Setting the value within the above range ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0107] Preferably, in this embodiment, the defrosting exit temperature second threshold T 化霜2 The value is 13℃.

[0108] This setting ensures effective defrosting even when there is no natural wind blowing across the outdoor heat exchanger, preventing reliability issues caused by incomplete defrosting.

[0109] The defrosting control method for air conditioning heating described in this embodiment has steps S1 to S5 that are interconnected and inseparable. Step S1 enters the defrosting mode, and the outdoor fan stops running. Steps S2 and S3 obtain the outdoor fan speed S in real time and determine whether the outdoor fan speed S is greater than the outdoor fan speed set value S. 设 And the duration t is greater than the first preset duration t 预1 If the outdoor fan speed S ≤ the outdoor fan speed set value S 设 Or the outdoor fan speed S > the outdoor fan speed setpoint S 设 But the duration t ≤ the first preset duration t 预1 If either of these conditions indicates that no natural wind is blowing across the outdoor heat exchanger, then proceed to step S5 to enter the second defrosting mode exit. The defrosting effect is guaranteed, and the defrosting cycle is still controlled according to the original maximum defrosting time. If the outdoor fan speed S > the outdoor fan speed set value S... 设 And the duration t is greater than the first preset duration t 预1 If there is natural wind blowing across the outdoor heat exchanger, then proceed to step S4 to enter the first defrost mode exit. The defrost time for the first defrost mode exit is the first threshold t. 化霜1 >Second threshold for defrosting time before exiting defrosting mode 化霜2 This extends the defrosting time to the maximum extent and ensures the reliability of defrosting.

[0110] Example 2

[0111] This embodiment proposes an air conditioner, which includes an outdoor unit and an indoor unit. The outdoor unit includes an outdoor fan and an outdoor heat exchanger. The air conditioner uses a defrosting control method for air conditioning heating as described in any one of Embodiment 1.

[0112] The air conditioner includes not only the defrosting control method for heating, the outdoor fan, and the outdoor heat exchanger, but also other related components. Since the specific structure and assembly relationship of these related components are existing technologies, they will not be described in detail here.

[0113] The advantages of the air conditioner described above and the defrosting control method for air conditioning heating compared to the prior art are the same, and will not be repeated here.

[0114] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A defrosting control method for air conditioning heating, characterized in that, The defrosting control method for air conditioning heating includes the following steps: S1. The air conditioner enters defrost mode, and the outdoor fan stops running; S2. Real-time acquisition of the outdoor fan speed S; S3. Determine if the outdoor fan speed S > the outdoor fan speed setpoint S. 设 And the duration t is greater than the first preset duration t 预1 If yes, proceed to step S4; otherwise, proceed to step S5. S4. Enter the first defrost mode; S5, Enter the second defrost mode; Among them, the first threshold value t is the defrosting time for the first exit from defrosting mode. 化霜1 >Second threshold for defrosting time before exiting defrosting mode 化霜2 .

2. The defrosting control method for air conditioning heating according to claim 1, characterized in that, Step S4 includes the following steps: S41, Obtain the defrosting time t1; S42. Determine whether the defrosting time t1 is greater than the first threshold t for defrosting time. 化霜1 If so, then exit the defrosting process; Alternatively, step S4 may include the following steps: S41. Obtain the outdoor heat exchanger's external plate temperature T. 外盘1 ; S42. Determine if the outer plate temperature is T. 外盘1 >Defrosting Exit Temperature First Threshold T 化霜1 And continue for the second preset duration t 预2 If so, then exit the frosting process.

3. The defrosting control method for air conditioning heating according to claim 2, characterized in that, Step S5 includes the following steps: S51, Obtain the defrosting time t2; S52. Determine whether the defrosting time t2 is greater than the second threshold t for defrosting time. 化霜2 If so, then exit the defrosting process; Alternatively, step S5 may include the following steps: S51, Obtain the outdoor heat exchanger's outer plate temperature T 外盘2 ; S52, Determine if the outer plate temperature is T 外盘2 >Second threshold temperature for defrosting exit T 化霜2 And continue for the third preset duration t 预3 If so, then exit the frosting process.

4. The defrosting control method for air conditioning heating according to claim 1, characterized in that, Outdoor fan speed setpoint S 设 The value range is [80, 120], and the outdoor fan speed setting value S 设 The unit is RPM.

5. The defrosting control method for air conditioning heating according to claim 3, characterized in that, First threshold for defrosting time t 化霜1 The value range is [15, 25], and the first threshold for defrosting time t 化霜1 The unit is min.

6. The defrosting control method for air conditioning heating according to claim 3, characterized in that, Second threshold for defrosting time t 化霜2 The value range is [4, 14], and the second threshold for defrosting time t 化霜2 The unit is min.

7. The defrosting control method for air conditioning heating according to claim 1, characterized in that, First preset duration t 预1 The value range is [2, 5], and the first preset duration t 预1 The unit is min.

8. The defrosting control method for air conditioning heating according to claim 3, characterized in that, The first threshold temperature for defrosting exit T 化霜1 The value range is [8, 18], and the first threshold temperature T for defrosting exit is... 化霜1 The unit is ℃.

9. The defrosting control method for air conditioning heating according to claim 3, characterized in that, The second threshold temperature for defrosting exit T 化霜2 The value range is [8, 18], and the second threshold T for defrosting exit temperature. 化霜2 The unit is ℃.

10. An air conditioner, characterized in that, The air conditioner includes an outdoor unit and an indoor unit. The outdoor unit includes an outdoor fan and an outdoor heat exchanger. The air conditioner uses a defrosting control method for air conditioning heating as described in any one of claims 1 to 9.

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