Defrosting method, heat exchanger structure and air conditioner

Abstract

The invention provides a defrosting method, a heat exchanger structure and an air conditioner, and the defrosting method comprises the following steps: detecting environmental parameters of an area where a to-be-defrosted structure is located under the most common frosting weather and system parameters under different start-up load states as preset load values; environment parameters and system parameters of the to-be-defrosted structure during current operation are detected to serve as calculated load values; setting a judgment condition for the structure to be defrosted to enter a defrosting state, comparing the preset load value with the calculated load value, and adjusting the judgment condition according to a comparison result; and according to the judgment conditions, the to-be-defrosted structure is defrosted, and the defrosting method solves the technical problem that the defrosting time of the outdoor heat exchanger is too long.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a defrosting method, a heat exchanger structure and an air conditioner. Background Art

[0002] When the air conditioner is heating, the outdoor heat exchanger acts as an evaporator, absorbing heat from the external environment. The surface temperature of the evaporator is relatively low, and it is easy to frost in the high humidity and low temperature outdoor environment, which affects the heat exchange efficiency of the outdoor heat exchanger and causes the heating performance of the air conditioner to decline. When frost accumulation is severe, it may cause the system to shut down.

[0003] However, the more common defrosting method on the market is generally to turn the outdoor condenser into an evaporator by switching the electronic expansion valve, and let the high-temperature refrigerant flow through the external heat exchanger to exchange heat with the frost layer for defrosting; when the system is defrosting, since the indoor room becomes the condenser, it is impossible to provide heat to the room and the conventional defrost cycle is generally about 10 minutes. During defrosting, it is impossible to exchange heat for the room. When the frost layer is too thin, the operating time is too long, resulting in a waste of time.

[0004] Therefore, the prior art needs to be further developed. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a defrosting method, a heat exchanger structure and an air conditioner to solve the technical problem of long defrosting time of an outdoor heat exchanger in the related art.

[0006] In order to achieve the above-mentioned technical objectives, the present invention adopts the following technical scheme: a defrosting method is provided, including: detecting the environmental parameters under the most common frosting weather in the area where the structure to be defrosted is located, and the system parameters under different startup load states, as preset load values; detecting the environmental parameters and system parameters when the structure to be defrosted is currently running, as calculated load values; setting the judgment conditions for the structure to be defrosted to enter the defrosting state, comparing the preset load value with the calculated load value, and adjusting the judgment conditions according to the comparison result; and defrosting the structure to be defrosted according to the judgment conditions.

[0007] Furthermore, environmental parameters include the temperature and humidity of the environment in which the outdoor unit is located; system parameters include the system low pressure of the structure to be defrosted, the defrost temperature and the heat exchange gas outlet temperature; wherein the defrost temperature is the temperature before the refrigerant enters the outdoor heat exchanger, and the heat exchange gas outlet temperature is the temperature of the refrigerant flowing out of the outdoor heat exchanger.

[0008] Furthermore, the determination conditions include: the system parameters of the structure to be defrosted satisfy a preset relationship; and the duration for which the system parameters of the structure to be defrosted satisfy the preset relationship meets the requirements.

[0009] Furthermore, the determination conditions include: the outlet temperature of the heat exchanger minus the defrost temperature of the heat exchanger>X°C, and lasts for Y time.

[0010] Furthermore, the method of adjusting the judgment condition according to the comparison result includes: when the calculated load value is equal to the preset load value, not adjusting the judgment condition; when the calculated load value is greater than the preset load value, reducing the value of X; when the calculated load value is less than the preset load value, increasing the value of X.

[0011] Furthermore, the situation where the calculated load value is equal to the preset load value includes: the ambient temperature of the outdoor unit is equal to 0℃±A℃; the ambient humidity of the outdoor unit is equal to B%±C%; the temperature value corresponding to the system low pressure of the defrost structure is equal to D℃±E℃.

[0012] Furthermore, the situations in which the calculated load value is greater than the preset load value include: the ambient temperature of the outdoor unit is less than 0°C; the ambient temperature of the outdoor unit is equal to 0°C±A°C, and the ambient humidity of the structure to be defrosted is greater than B%; the ambient temperature of the structure to be defrosted is equal to 0°C±A°C, the ambient humidity of the structure to be defrosted is equal to B%±C%, and the temperature value corresponding to the system low pressure of the structure to be defrosted is less than D°C.

[0013] Furthermore, the situations in which the calculated load value is less than the preset load value include: the ambient temperature of the outdoor unit is greater than 0°C; the ambient temperature of the outdoor unit is equal to 0°C±A°C, and the ambient humidity of the structure to be defrosted is less than B%; the ambient temperature of the structure to be defrosted is equal to 0°C±A°C, the ambient humidity of the structure to be defrosted is equal to B%±C%, and the temperature value corresponding to the system low pressure of the structure to be defrosted is greater than D°C.

[0014] Furthermore, when it is determined that the calculated load value is greater than the preset load value, the method for defrosting the defrost structure includes: during the defrosting process, increasing the operating frequency of the compressor during defrosting; during the defrosting process, when the compressor frequency has reached the maximum frequency, extending the defrosting time.

[0015] Further, when it is determined that the calculated load value is less than the preset load value, the method of defrosting the structure to be defrosted includes reducing the defrosting time.

[0016] Furthermore, the method for defrosting the defrost structure includes a method for exiting defrosting, and the method for exiting defrosting includes: the defrost temperature reaches a preset value; and / or the heat exchange gas outlet temperature reaches a preset value; and / or the system exhaust temperature reaches a preset value; the defrost time reaches a preset value.

[0017] A heat exchanger structure is suitable for the above-mentioned defrosting method, and the heat exchanger structure includes: an external environment temperature sensing package; and / or, an external environment humidity sensor; and / or, a defrosting temperature sensing package; and / or, a heat exchanger air outlet temperature sensing package; and / or, a system low pressure sensor.

[0018] An air conditioner is applicable to the above-mentioned defrosting method.

[0019] Beneficial effects:

[0020] The defrosting method of the present invention comprises: detecting the most common environmental parameters under frosting weather in the area where the structure to be defrosted is located, and system parameters under different startup load states, as preset load values; detecting the environmental parameters and system parameters when the structure to be defrosted is currently operating, as calculated load values; setting the judgment condition for the structure to be defrosted to enter the defrosting state, comparing the preset load value with the calculated load value, and adjusting the judgment condition according to the comparison result; defrosting the structure to be defrosted according to the judgment condition. With the above setting, the most common environmental parameters under frosting weather in the area where the structure to be defrosted is located, the system parameters under different startup load states, and the environmental parameters and system parameters when the structure to be defrosted is currently operating are compared, and the judgment condition is adjusted, so as to control the timing of the structure to be defrosted entering the defrosting state, thereby adjusting the entire defrosting cycle, so that the defrosting action is timely, and the defrosting cycle is not too long, thereby avoiding the phenomenon of time waste, and solving the technical problem of the outdoor heat exchanger taking too long to defrost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic flow chart of an embodiment of the defrosting method adopted in an embodiment of the present invention;

[0022] Figure 2 It is a flow chart of another embodiment of the defrosting method adopted in the embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution 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 the present application.

[0024] See also Figure 1 , Figure 2According to an embodiment of the present invention, a defrosting method is provided, including: detecting the most common environmental parameters under frosting weather in the area where the structure to be defrosted is located, and system parameters under different startup load states, as preset load values; detecting the environmental parameters and system parameters when the structure to be defrosted is currently operating, as calculated load values; setting the judgment condition for the structure to be defrosted to enter the defrosting state, comparing the preset load value with the calculated load value, and adjusting the judgment condition according to the comparison result; defrosting the structure to be defrosted according to the judgment condition. With the above settings, the most common environmental parameters under frosting weather in the area where the structure to be defrosted is located, the system parameters under different startup load states, and the environmental parameters and system parameters when the structure to be defrosted is currently operating are compared, and the judgment condition is adjusted, so as to control the timing of the structure to be defrosted entering the defrosting state, thereby adjusting the entire defrosting cycle, so that the defrosting action is timely, and the defrosting cycle is not too long, thereby avoiding the phenomenon of time waste, and solving the technical problem of the outdoor heat exchanger taking too long to defrost.

[0025] Specifically, the environmental parameters under the most common frosting weather in the area where the defrost structure is located and the system parameters under different startup load states can be statistically obtained based on a period of time.

[0026] In the defrosting method of this embodiment, see Figure 1 , Figure 2 , environmental parameters include the temperature and humidity of the environment where the outdoor unit is located; system parameters include the system low pressure, defrost temperature and heat exchange gas outlet temperature of the structure to be defrosted; among them, the defrost temperature is the temperature before the refrigerant enters the outdoor heat exchanger, and the heat exchange gas outlet temperature is the temperature of the refrigerant flowing out of the outdoor heat exchanger. In this way, all parameters affecting defrosting are involved in the comparison, making the control more accurate.

[0027] In the defrosting method of this embodiment, see Figure 1 , Figure 2 The judgment conditions include: the system parameters of the defrost structure to be defrosted satisfy the preset relationship; the duration of the system parameters of the defrost structure to be defrosted satisfying the preset relationship reaches the requirement. In this way, the entire defrost cycle can be adjusted so that the defrost action is timely and the defrost cycle is not too long, thereby avoiding the phenomenon of time waste.

[0028] See also Figure 1 , Figure 2 In the defrosting method of this embodiment, the judgment conditions include: the outlet temperature of the heat exchanger - the defrosting temperature of the heat exchanger>X℃, and it lasts for Y time. In this way, judging the condition of the heat exchanger by the inlet and outlet temperatures of the heat exchanger is more intuitive and easy to operate.

[0029] In the defrosting method of this embodiment, see Figure 1 , Figure 2The method of adjusting the judgment condition according to the comparison result includes: when the calculated load value is equal to the preset load value, not adjusting the judgment condition; when the calculated load value is greater than the preset load value, reducing the value of X; when the calculated load value is less than the preset load value, increasing the value of X.

[0030] Specifically, when the calculated load value is equal to the preset load value, it means that the system is in the same condition as the default condition, so the judgment condition is not adjusted; when the calculated load value is greater than the preset load value, it means that the system is in a condition that is more prone to frost than the default condition, so the value of X is reduced to allow the system to quickly enter the defrosting state to save time; when the calculated load value is less than the preset load value, it means that the system is in a condition that is less prone to frost than the default condition, so the value of X is increased to allow the system to fully determine whether defrosting is needed to avoid insufficient defrosting. In this way, the timing of entering defrosting is more reasonable, thereby ensuring the working efficiency of the system.

[0031] See also Figure 1 , Figure 2 In the defrosting method of this embodiment, the situations where the calculated load value is equal to the preset load value include: the ambient temperature of the outdoor unit is equal to 0℃±A℃; the ambient humidity of the outdoor unit is equal to B%±C%; the temperature value corresponding to the system low pressure of the defrosting structure is equal to D℃±E℃.

[0032] See also Figure 1 , Figure 2 In the defrosting method of this embodiment, the situations in which the calculated load value is greater than the preset load value include: the ambient temperature of the outdoor unit is less than 0°C; the ambient temperature of the outdoor unit is equal to 0°C±A°C, and the ambient humidity of the structure to be defrosted is greater than B%; the ambient temperature of the structure to be defrosted is equal to 0°C±A°C, the ambient humidity of the structure to be defrosted is equal to B%±C%, and the temperature value corresponding to the system low pressure of the structure to be defrosted is less than D°C.

[0033] See also Figure 1 , Figure 2 In the defrosting method of this embodiment, the situations in which the calculated load value is less than the preset load value include: the ambient temperature of the outdoor unit is greater than 0°C; the ambient temperature of the outdoor unit is equal to 0°C±A°C, and the ambient humidity of the structure to be defrosted is less than B%; the ambient temperature of the structure to be defrosted is equal to 0°C±A°C, the ambient humidity of the structure to be defrosted is equal to B%±C%, and the temperature value corresponding to the system low pressure of the structure to be defrosted is greater than D°C.

[0034] Specifically, when other parameters remain unchanged, the lower the outer ring temperature, the worse the defrost effect; the higher the humidity, the worse the defrost effect; the lower the system low pressure, the worse the defrost effect; under different ambient temperatures, the change in defrost temperature is used to determine whether the system has entered defrost, and the control is more precise.

[0035] In the defrosting method of this embodiment, see Figure 1 , Figure 2 When it is determined that the calculated load value is greater than the preset load value, the method for defrosting the defrosting structure includes: during the defrosting process, increasing the operating frequency of the compressor during defrosting; during the defrosting process, when the compressor frequency has run to the maximum frequency, extending the defrosting time.

[0036] Specifically, since the calculated load value is large, it means that the defrosting condition is worse. At this time, it is necessary to increase the compressor operating frequency during defrosting. When the compressor frequency has reached the maximum frequency, the defrosting time is extended to ensure sufficient defrosting.

[0037] See also Figure 1 , Figure 2 In the defrosting method of the present embodiment, when it is determined that the calculated load value is less than the preset load value, the method for defrosting the structure to be defrosted includes: reducing the defrosting time.

[0038] Specifically, since the calculated load value is large, it means that the demand for defrosting is not very high. At this time, the defrosting time is reduced, thereby saving energy.

[0039] In the defrosting method of this embodiment, see Figure 1 , Figure 2 The method for defrosting the defrosting structure includes a method for exiting defrosting, and the method for exiting defrosting includes: the defrosting temperature reaches a preset value; and / or the heat exchange gas outlet temperature reaches a preset value; and / or the system exhaust temperature reaches a preset value; the defrosting time reaches a preset value. In this way, when the defrosting structure meets the conditions for exiting defrosting, defrosting is exited, thereby reducing the defrosting cycle and reducing costs.

[0040] The heat exchanger structure of this embodiment is suitable for the above-mentioned defrosting method, and the heat exchanger structure includes: an external environment temperature sensing package; and / or, an external environment humidity sensor; and / or, a defrosting temperature sensing package; and / or, a heat exchanger air outlet temperature sensing package; and / or, a system low pressure sensor.

[0041] Specifically, the outdoor unit of this embodiment is equipped with an external environment temperature sensor, an external environment humidity sensor, a defrost temperature sensor, a heat exchanger air outlet temperature sensor, and a system low pressure sensor; with the above system components, the outdoor unit can monitor the external environment conditions and system operating status in real time.

[0042] The air conditioner of this embodiment is suitable for the above-mentioned defrosting method.

[0043] The defrosting method of this embodiment is described as follows:

[0044] 1. Calculate the load value:

[0045] For the convenience of explanation, the calculated load value is a general term for the current external loop parameters (temperature, humidity) and system parameters: heat exchanger gas outlet, defrost temperature, exhaust temperature, low pressure and other parameters related to the heating operation of the unit.

[0046] 2. Preset load value:

[0047] For the sake of convenience, the preset load value is a general term for the external loop parameters (temperature and humidity) of the most common frosting weather in the area where the unit is located and the system parameters under different startup load states when operating under this condition: heat exchanger air outlet, defrost temperature, exhaust temperature, low pressure and other parameters related to the heating operation of the unit.

[0048] 3. Comparison of calculated load value with preset load value

[0049] The comparison between the calculated load value and the preset load value is to compare some parameter values ​​under specific conditions. For example, when determining whether the system is seriously frosted, the outer ring temperature and humidity will be compared to see if the regular frosting weather is bad. If it is worse than the preset value, the calculated load value is greater than the preset load value. If the outer ring working condition is the same as the regular frosting weather, the unit operating parameters will be compared: whether the system low pressure, defrost temperature, and heat exchanger outlet temperature are worse than the preset value (whether the system low pressure and defrost temperature are lower than the preset standard value). If so, the calculated load value is greater than the preset load value. This determination requires a lot of experiments, because different system parameters under different unit configurations have different degrees of influence on the frosting of the external unit. This embodiment only provides a direction for comparison. The specific comparison values ​​need to be assigned to different system parameters based on specific experimental results.

[0050] 4. Runtime Control

[0051] (1) Control before defrosting

[0052] When the system is running in heating mode, the external loop temperature, humidity, system low pressure and defrost temperature are used to determine whether the unit will enter defrosting mode. For example, when the external loop temperature is less than 0°C, the humidity is high, and the low pressure is low during system operation, the outdoor unit will frost. If the current working and operating conditions do not cause frost to form on the outdoor unit, the system will cancel the defrost cycle and run normally in heating mode. Otherwise, the system will enter the pre-defrosting state, and the interval time for the unit to enter the defrosting mode will be controlled by calculating the load value. See the following example for the specific comparison method:

[0053] Assume that the common low temperature working conditions of the unit in winter are: 0℃ / humidity 70%. After 100% load startup and stable operation, the system low pressure is -10℃. Take 100% load startup as an example:

[0054] ① Determine that the calculated load value = the preset load value: (all of the following conditions are met)

[0055] a) Outer ring temperature = 0℃±0.5℃;

[0056] b) Outer ring humidity = 70% ± 5%;

[0057] c) System low pressure = -10℃±2℃.

[0058] At this time, defrosting is performed according to the preset value, and the judgment value for entering defrosting is not adjusted; it is assumed that the judgment for entering defrosting at this time is: detecting the heat exchange gas outlet temperature - defrost temperature> 13°C for 50s.

[0059] ② Determine that the calculated load value > the preset load value: (one of the following conditions can be met)

[0060] Note: When judging the size, it is assumed to be smaller or larger than the ± range value in ①.

[0061] a) At this time, the outer ring working condition is less than 0℃;

[0062] b) At this time, the outer ring working condition = 0°C, and the outer ring humidity is > 70%;

[0063] c) At this time, the outer ring working condition = 0℃ / humidity 70%, and the system low pressure is <-10℃.

[0064] The judgment value for entering defrost is reduced according to the interval, for example: at this time, the outer ring is -2℃, the humidity is 80%, and the system low pressure is -10℃. According to the preset interval of this unit, the judgment for entering defrost is: the heat exchange gas outlet temperature - defrost temperature> 12℃ for 50s.

[0065] ③ Determine whether the calculated load value is less than the preset load value: (one of the following conditions can be met)

[0066] a) At this time, the outer ring working condition is > 0℃;

[0067] b) At this time, the outer ring working condition = 0°C, and the outer ring humidity is <70%;

[0068] c) At this time, the outer ring working condition = 0℃ / humidity 70%, and the system low pressure > -10℃.

[0069] The judgment value for entering defrost is increased according to the interval.

[0070] (2) Control during defrosting operation

[0071] When the system enters defrosting mode, control is performed based on the judgment result in (1):

[0072] When the calculated load value is greater than the preset load value: the compressor operating frequency during defrosting should be appropriately increased. When the compressor frequency has reached the maximum frequency, the defrosting time should be appropriately extended. The specific compressor frequency increase and defrosting extension time need to be adjusted according to the unit's own conditions.

[0073] ② When it is determined that the calculated load value = the preset load value: defrost is performed according to the default settings without adjustment.

[0074] ③ When it is determined that the calculated load value is less than the preset load value: appropriately reduce the defrost operation time. The specific reduction time needs to be adjusted in combination with the unit's own conditions.

[0075] (3) Control of defrosting end

[0076] When the system enters defrosting, it can exit defrosting in advance as long as any of the following conditions is met:

[0077] ① When the defrost temperature sensor, the heat exchanger air outlet temperature sensor and the system exhaust temperature reach the preset value (calibrated according to the parameters when the unit is fully defrosted); Note: When the external ring working conditions are severe, such as when the external ring humidity is high and the temperature is low, the preset value will be appropriately increased according to the severity of the working conditions to ensure successful defrosting of the external unit.

[0078] ② The total time for defrosting reaches the set value stated in (2).

[0079] After the defrost is completed, the process returns to the starting point and repeats the next cycle.

[0080] 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.

[0081] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0082] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0083] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0084] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A defrosting method, characterized in that: include: Detect the most common environmental parameters of the frosting weather in the area where the structure to be defrosted is located and the system parameters under different startup load states as preset load values; Detect the environmental parameters and system parameters of the structure to be defrosted during current operation as the calculation load value; Setting a determination condition for the defrosting structure to enter a defrosting state, comparing the preset load value with the calculated load value, and adjusting the determination condition according to the comparison result; According to the judgment conditions, defrost the structure to be defrosted.

2. The defrosting method according to claim 1, characterized in that: The environmental parameters include the temperature and humidity of the environment where the outdoor unit is located; The system parameters include the system low pressure, defrost temperature and heat exchange gas outlet temperature of the structure to be defrosted; wherein the defrost temperature is the temperature before the refrigerant enters the outdoor heat exchanger, and the heat exchange gas outlet temperature is the temperature of the refrigerant flowing out of the outdoor heat exchanger.

3. The defrosting method according to claim 2, characterized in that: The determination conditions include: The system parameters of the structure to be defrosted satisfy a preset relationship; The duration during which the system parameters of the structure to be defrosted meet the preset relationship meets the requirement.

4. The defrosting method according to claim 3, characterized in that: The determination conditions include: The outlet temperature of the heat exchanger minus the defrost temperature of the heat exchanger>X°C, and lasts for Y time.

5. The defrosting method according to claim 4, characterized in that: The method for adjusting the determination condition according to the comparison result includes: When the calculated load value is equal to the preset load value, the determination condition is not adjusted; When the calculated load value is greater than the preset load value, reducing the value of X; When the calculated load value is less than the preset load value, the value of X is increased.

6. The defrosting method according to claim 5, characterized in that: The case where the calculated load value is equal to the preset load value includes: The ambient temperature of the outdoor unit is equal to 0℃±A℃; The ambient humidity of the outdoor unit is equal to B%±C%; The temperature value corresponding to the system low pressure of the structure to be defrosted is equal to D°C±E°C.

7. The defrosting method according to claim 5, characterized in that: The situation where the calculated load value is greater than the preset load value includes: The ambient temperature of the outdoor unit is less than 0℃; The ambient temperature of the outdoor unit is equal to 0°C ±A°C, and the ambient humidity of the structure to be defrosted is greater than B%; The ambient temperature of the structure to be defrosted is equal to 0°C±A°C, the ambient humidity of the structure to be defrosted is equal to B%±C%, and the temperature value corresponding to the system low pressure of the structure to be defrosted is less than D°C.

8. The defrosting method according to claim 5, characterized in that: The situation where the calculated load value is less than the preset load value includes: The ambient temperature of the outdoor unit is greater than 0°C; The ambient temperature of the outdoor unit is equal to 0°C ±A°C, and the ambient humidity of the structure to be defrosted is less than B%; The ambient temperature of the structure to be defrosted is equal to 0°C±A°C, the ambient humidity of the structure to be defrosted is equal to B%±C%, and the temperature value corresponding to the system low pressure of the structure to be defrosted is greater than D°C.

9. The defrosting method according to claim 1, characterized in that: When it is determined that the calculated load value is greater than the preset load value, the method for defrosting the structure to be defrosted includes: During the defrosting process, increase the compressor operating frequency during defrosting; During the defrost process, when the compressor frequency has reached the maximum frequency, the defrost time is extended.

10. The defrosting method according to claim 1, characterized in that: When it is determined that the calculated load value is less than the preset load value, the method for defrosting the structure to be defrosted includes: Reduce the defrosting time.

11. The defrosting method according to claim 1, characterized in that: The method for defrosting the structure to be defrosted includes a method for exiting defrosting, and the method for exiting defrosting includes: The defrost temperature reaches the preset value; and / or, The heat exchange gas outlet temperature reaches a preset value; and / or, The system exhaust temperature reaches the preset value; The defrost time reaches the preset value.

12. A heat exchanger structure, applicable to the defrosting method according to any one of claims 1 to 11, characterized in that: The heat exchanger structure comprises: External environment temperature sensing package; and / or, external environment humidity sensor; and / or, defrost temperature sensing package; and / or, heat exchanger air outlet temperature sensing package; and / or, system low pressure sensor.

13. An air conditioner, characterized in that: The air conditioner is applicable to the defrosting method according to any one of claims 1 to 11.

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