Defrosting structure, defrosting method, refrigeration cycle system, refrigerator and storage medium

Abstract

The embodiments of the present application relate to the field of household appliances, and in particular to a defrosting structure, defrosting method, refrigeration cycle system, refrigerator and storage medium for an evaporator. The defrosting structure includes an air duct, a suction pipe and a drive assembly. The air duct has an air inlet end and an air outlet end. At least one suction portion is formed on the air duct, and the suction portion includes a contraction section with a gradually decreasing diameter, a throat and a diffusion section with a gradually increasing diameter arranged in sequence; one end of the suction pipe is connected to the throat; and the drive assembly is used to drive the airflow from the air inlet end to the air outlet end. The defrosting solution for the evaporator provided in the embodiments of the present application can shorten the defrosting time and save energy; reduce the impact of defrosting on the heat transfer performance of the evaporator; and greatly reduce the impact of defrosting on the temperature of the compartment.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of household appliances, and in particular to a defrosting structure and a defrosting method for an evaporator, a refrigeration cycle system, a refrigerator, and a storage medium. Background Art

[0002] Frosting on the evaporator is inevitable during refrigerator operation. Frost increases circulation resistance and heat exchange resistance, reducing the evaporator's heat transfer performance, which in turn affects the refrigerator's cooling performance. To maintain stable operation, defrosting is necessary. A common defrosting method for refrigerators is to use an electric heater located at the bottom of the evaporator. However, the disadvantages of this method are that if the defrost time is too long, the compartment temperature will be affected. If the defrost time is insufficient, the frost layer on the top of the evaporator will not completely melt. Residual frost and undewed defrosted moisture will affect heat transfer performance. Summary of the Invention

[0003] In view of this, in order to solve the problems existing in the above-mentioned evaporator defrosting process, the embodiments of the present application provide a defrosting structure, a defrosting method, a refrigeration cycle system, a refrigerator and a storage medium for an evaporator.

[0004] In a first aspect, an embodiment of the present application provides a defrosting structure for an evaporator, comprising:

[0005] An air duct having an air inlet end and an air outlet end, wherein at least one suction portion is formed on the air duct, and the suction portion includes a contraction section with a gradually decreasing diameter, a throat, and a diffusion section with a gradually increasing diameter, which are sequentially arranged;

[0006] a suction pipe, one end of which is in communication with the throat; and

[0007] A driving component is used to drive the air flow from the air inlet end to the air outlet end.

[0008] Furthermore, the air duct includes a transverse section located above the evaporator and a longitudinal section located on both sides of the evaporator, and the suction part is provided in plurality, and the suction part includes an upper suction part provided on the transverse section and a lower suction part located on the longitudinal section, and the suction pipe includes an upper suction pipe connected to the upper suction part and a lower suction pipe connected to the lower suction part.

[0009] Furthermore, one end of the upper suction pipe away from the upper suction part is located above the evaporator, and one end of the lower suction pipe away from the lower suction part is located in the lower middle part of the evaporator.

[0010] Furthermore, the driving component is a fan or an air pump.

[0011] Furthermore, the driving assembly includes an air inlet fan arranged at the air inlet end and an air outlet fan arranged at the air outlet end.

[0012] Furthermore, the defrosting structure of the evaporator further includes a pressure sensor, and the pressure sensor is used to detect the pressure at the air outlet.

[0013] Furthermore, an auxiliary heating element is provided in the air duct.

[0014] In second aspect, an embodiment of the present application provides a refrigeration cycle system, which includes a compressor, a condenser and an evaporator interconnected by pipelines, and the evaporator is located in a first chamber. The refrigeration cycle system also includes a main heating element and a defrost structure provided in the first aspect of the present application. The main heating element is arranged in the first chamber to heat and defrost the evaporator, and the end of the suction pipe away from the throat is located in the first chamber.

[0015] Furthermore, the compressor is located in the second chamber, and the air inlet end is connected to the second chamber.

[0016] In a third aspect, an embodiment of the present application provides a refrigerator comprising the refrigeration cycle system provided in the second aspect of the present application.

[0017] In a fourth aspect, an embodiment of the present application provides a defrosting method for an evaporator, which adopts the defrosting structure of the evaporator provided in the first aspect of the present application, and the defrosting method includes:

[0018] heating and defrosting the evaporator for a first preset time;

[0019] The driving component is turned on for a second preset time, driving the air flow from the air inlet end to the air outlet end.

[0020] Furthermore, the defrosting method for the evaporator further includes:

[0021] During a second preset time when the driving component is turned on, comparing the air outlet pressure of the air outlet end with a preset pressure;

[0022] If the air outlet pressure is always greater than or equal to the preset pressure, the driving component is shut down after being turned on for a second preset time;

[0023] If the air outlet pressure is lower than the preset pressure, the interior of the air duct is heated.

[0024] In a fifth aspect, an embodiment of the present application provides a storage medium, which stores one or more programs, and one or more of the programs can be executed by one or more processors to implement the defrosting method of the evaporator provided in the fourth aspect of the present application.

[0025] The defrosting solution for the evaporator provided in the embodiment of the present application can shorten the defrosting time and save energy; reduce the impact of defrosting on the heat transfer performance of the evaporator; and greatly reduce the impact of defrosting on the compartment temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the defrost structure provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the connection relationship between the suction part and the suction pipe in the defrost structure provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of the structure of the refrigeration cycle system provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of a defrosting method according to an embodiment of the present invention;

[0030] Figure 5 A schematic flow chart of another defrosting method provided in an embodiment of the present application.

[0031] In the picture:

[0032] 100, air duct; 110, air inlet; 120, air outlet; 130, suction section; 131, contraction section; 132, throat; 133, diffusion section; 134, upper suction section; 135, lower suction section; 140, transverse section; 150, longitudinal section;

[0033] 200, suction pipe; 210, upper suction pipe; 220, lower suction pipe;

[0034] 300, drive assembly; 310, air inlet fan; 320, air outlet fan;

[0035] 400, filter;

[0036] 500, frost suction port;

[0037] 600, pressure sensor;

[0038] 700, auxiliary heating element;

[0039] 1. Compressor; 2. Condenser; 3. Evaporator; 4. Condensation fan; 5. First chamber; 6. Second chamber; 7. Main heating element. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] To facilitate understanding of the embodiments of the present application, the following Figure 1-5 Further explanation is given with reference to specific embodiments, which do not constitute a limitation on the embodiments of the present application.

[0042] like Figure 1-3 As shown, the defrost structure of the evaporator 3 provided in the embodiment of the present application includes an air duct 100, a suction pipe 200 and a drive assembly 300, wherein the air duct 100 has an air inlet end 110 and an air outlet end 120, and at least one suction portion 130 is formed on the air duct 100, and the suction portion 130 includes a contraction section 131 with a gradually decreasing diameter, a throat 132 and a diffusion section 133 with a gradually expanding diameter arranged in sequence; one end of the suction pipe 200 is connected to the throat 132; and the drive assembly 300 is used to drive the airflow from the air inlet end 110 to the air outlet end 120.

[0043] In the above embodiment, the suction portion 130 on the air duct 100 forms a Venturi tube structure through the contraction section 131, the throat 132 and the diffusion section 133. When the driving component 300 drives the airflow from the air inlet end 110 to the air outlet end 120, the gas flows in the suction portion 130 along the contraction section 131, the throat 132 and the diffusion section 133 in sequence, wherein the throat 132 is the narrowest part of the suction portion 130, the dynamic pressure reaches the maximum value, and the static pressure reaches the minimum value. The speed of the gas increases due to the reduction in the cross-sectional area of ​​the flow. The entire airflow must undergo the process of pipe diameter reduction at the same time, so the pressure also decreases at the same time, thereby generating a pressure difference. A vacuum will be generated at the thinnest throat 132. When the throat 132 is connected to the suction pipe 200, the surrounding air is sucked into the throat 132 through the suction pipe 200. Specifically, when solid frost remains on the evaporator 3 after it is defrosted by heating, the negative pressure suction effect of the throat 132 can directly suck away the solid frost remaining on the evaporator 3. At the same time, the suction pipe 200 draws away the gas with high moisture content in the environment where the evaporator 3 is located in the form of suction, thereby reducing the humidity and heat in the chamber of the evaporator 3, avoiding incomplete dripping of defrosted water, and directly freezing after cooling again, which affects the refrigeration efficiency.

[0044] In an optional embodiment, if Figure 1 and 3As shown, the air duct 100 includes a transverse section 140 located above the evaporator 3 and longitudinal sections 150 located on both sides of the evaporator 3. Multiple suction portions 130 are provided, each including an upper suction portion 134 provided on the transverse section 140 and a lower suction portion 135 located on the longitudinal section 150. The suction pipe 200 includes an upper suction pipe 210 communicating with the upper suction portion 134 and a lower suction pipe 220 communicating with the lower suction portion 135. The end of the upper suction pipe 210 away from the upper suction portion 134 is located above the evaporator 3, while the end of the lower suction pipe 220 away from the lower suction portion 135 is located in the lower middle portion of the evaporator 3. Typically, the heat source for heating and defrosting the evaporator 3 is located below the evaporator 3. If the defrosting time is insufficient, the frost layer at the top of the evaporator 3 will not be completely melted, which is the most unfavorable position for defrosting the evaporator 3. The upper suction pipe 210 and the upper suction portion 134 can be mainly used to absorb the frost layer remaining on the evaporator 3. The ends of the lower suction pipe 220 are located on the left and right sides of the evaporator 3. The negative pressure suction effect of the lower suction portion 135 and the lower suction pipe 220 can mainly absorb the hot and humid air in the middle and lower part of the evaporator 3, thereby reducing the impact of defrosting on the compartment and reducing the impact of the humidity in the compartment on subsequent refrigeration.

[0045] In some embodiments, as Figure 1 and 3 As shown, the air inlet end 110 of the air duct 100 is provided with a replaceable filter 400, which is used to improve the cleanliness of the interior of the air duct 100. The specific form of the filter 400 includes, but is not limited to, one or more of the following: a primary filter, a HEPA filter, an activated carbon filter, and an electrostatic dust removal filter.

[0046] In some embodiments, as Figure 1-3 As shown, a frost suction port 500 is formed at one end of the suction pipe 200 away from the throat 132. The frost suction port 500 is in a trumpet shape, which can increase the suction coverage area of ​​the suction pipe 200 and improve the suction efficiency.

[0047] The driving assembly 300 in the embodiment of the present application includes but is not limited to a fan and an air pump, and any power mechanism that can drive the air flow from the air inlet to the air outlet at a certain flow rate and flow rate can be used. For example, in some embodiments, Figure 1 and 3 As shown, the driving assembly 300 includes an air inlet fan 310 arranged at the air inlet end 110 and an air outlet fan 320 arranged at the air outlet end 120. The setting of the dual fans can ensure that a stable directional flow of air is formed inside the fan.

[0048] In some embodiments, as Figure 1 and 3As shown, the defrost structure of the evaporator 3 further includes a pressure sensor 600 and an auxiliary heating element 700. The pressure sensor 600 is disposed at the air outlet 120 of the air duct 100, and the auxiliary heating element 700 is disposed within the air duct 100. The pressure sensor 600 is used to detect the pressure at the air outlet 120. When the pressure value at the air outlet 120 detected by the pressure sensor 600 is low, it indicates that ice blockage has occurred in the air duct 100, preventing smooth airflow within the air duct 100. At this time, the auxiliary heating element 700 in the air duct 100 is activated to heat the air duct 100, melting the ice blockage and thereby restoring the air flow within the air duct 100.

[0049] like Figure 3 As shown, the embodiment of the present application also provides a refrigeration cycle system, which includes a compressor 1, a condenser 2 and an evaporator 3 interconnected by pipelines. The refrigeration cycle system also includes a condenser fan 4 for air cooling and heat dissipation of the condenser 2. During operation, the compressor 1 sucks in low-pressure, low-temperature refrigerant gas, which is compressed into high-pressure, high-temperature gas and sent to the condenser 2. The condenser fan 4 drives the air flow to exchange heat with the condenser 2, thereby dissipating heat to the surrounding air. The working gas in the condenser 2 is condensed into a high-pressure, low-temperature liquid, which is then reduced in pressure and throttled by a throttling structure to a low-pressure, low-temperature liquid, which flows into the evaporator 3 for evaporation. Because the evaporation process of the liquid is an endothermic process, the heat in the space around the evaporator 3 and on the objects is continuously absorbed by the evaporator 3, and the temperature gradually decreases. The evaporated refrigerant gas continues to be sucked in by the compressor 1 and circulates continuously, thereby achieving the purpose of cooling in the space where the evaporator 3 is located. Specifically, the evaporator 3 is located in the first chamber 5, and the above-mentioned refrigeration cycle system can achieve the purpose of cooling the first chamber 5.

[0050] The refrigeration cycle system also includes a main heating element 7 and an auxiliary defrost structure, which is the defrost structure provided in the aforementioned embodiment of the present application. The main heating element 7 is arranged in the first chamber 5 to heat and defrost the evaporator 3. The end of the suction pipe 200 of the defrost structure away from the throat 132 is located in the first chamber 5. When the evaporator 3 needs to be defrosted in the refrigeration cycle system, the evaporator 3 is heated and defrosted by the main heating element 7. After the main heating element 7 has finished working, the driving component 300 of the defrost structure is started. The negative pressure suction effect of the throat 132 can directly suck away the solid frost remaining on the evaporator 3. At the same time, the suction pipe 200 draws away the gas with a high moisture content in the first chamber 5 where the evaporator 3 is located in the form of suction, thereby reducing the humidity and heat in the chamber of the evaporator 3, and avoiding incomplete dripping of defrosted water. After cooling again, it directly freezes, affecting the refrigeration efficiency.

[0051] In some embodiments, the compressor 1 in the refrigeration cycle system is located within the second chamber 6, and the air inlet end 110 is connected to the second chamber 6. Expelling the airflow within the second chamber 6 through the air duct facilitates heat dissipation within the second chamber 6 where the compressor 1 is located, thereby improving the energy efficiency of the compressor 1. In addition, the airflow flowing within the air duct 100 is primarily the hot airflow within the second chamber 6 where the compressor 1 is located. This not only helps dissipate heat within the compressor 1 chamber, but also increases the temperature within the air duct 100, reducing the risk of ice blockage within the air duct 100.

[0052] In some embodiments, the structure of the evaporator 3 can also be changed to cooperate with the defrost structure to enhance the effect of negative pressure suction. For example, the conventional structure of the evaporator 3 can be transformed into a "well"-shaped structure, which is beneficial for the main heating element 7 to perform heating and defrosting, and is also beneficial for the air duct 100 to perform negative pressure suction through the suction pipe 200.

[0053] The embodiment of the present application also correspondingly protects a refrigerator, which includes the refrigeration cycle system provided by the aforementioned embodiment of the present application, that is, the refrigeration function of the refrigerator is realized by the refrigeration cycle system, and the first chamber 5 where the evaporator 3 is located is the freezer or refrigerator of the refrigerator.

[0054] The present application also provides a defrosting method, which adopts the defrosting structure of the evaporator 3 provided in the above embodiment of the present application and is applied to the refrigeration cycle system of the above embodiment. The defrosting method is used to assist in controlling the defrosting process of the evaporator 3 of the refrigeration cycle system. Specifically, Figure 4 As shown, the defrosting method for the evaporator 3 includes the following steps S1 and S2.

[0055] Step S1 , heating and defrosting the evaporator 3 for a first preset time t1 .

[0056] In this step, the double layer on the surface of the evaporator 3 is melted primarily by heating, thereby achieving preliminary defrosting. The heating process is specifically performed by the main heating element 7. The first preset time t1 is the timed defrosting duration of the evaporator 3. The first preset time t1 can be reasonably set based on the degree of frost on the evaporator 3 and the specific operating conditions of the main heating element 7. For example, the first preset time t1 can be set to 10 minutes.

[0057] In addition, if Figure 5As shown, the refrigeration cycle system's evaporator 3 actually entering the defrost program can be determined as follows: the cumulative operating time of the compressor 1 is recorded, and based on the cumulative operating time of the compressor 1, whether to enter the defrost program is determined. If the cumulative operating time of the compressor 1 does not reach the threshold for triggering the defrost program, the refrigeration cycle system does not enter the defrost program for the evaporator 3, and the refrigeration cycle system continues to refrigerate normally. If the cumulative operating time of the compressor 1 does not reach the threshold for triggering the defrost program, the refrigeration cycle system stops refrigeration and enters the defrost program for the evaporator 3, i.e., the evaporator 3 is heated and defrosted for a first preset time t1.

[0058] In step S2 , the driving component 300 is turned on for a second preset time t2 to drive the air flow from the air inlet end 110 to the air outlet end 120 .

[0059] This step belongs to the auxiliary defrosting stage. After the drive component 300 is started, a continuous airflow is formed in the airway. The negative pressure suction effect of the throat 132 can directly suck away the solid frost remaining on the evaporator 3. At the same time, the suction pipe 200 draws away the gas with a high moisture content in the first chamber 5 where the evaporator 3 is located in the form of suction, thereby reducing the humidity and heat in the chamber of the evaporator 3, avoiding incomplete dripping of defrosted water, and directly freezing after cooling again, which affects the refrigeration efficiency. The second preset time t2 is the working time of the drive component 300. When the drive component 300 includes an air inlet fan 310 and an air outlet fan 320, the second preset time t2 is the time for the two fans to operate simultaneously. The second preset time t2 can be specifically designed according to the working conditions of the drive component 300 and the residual degree of the evaporator 3 after timed defrosting. For example, the second preset time t2 can be set to 5 minutes.

[0060] In some embodiments, in order to prevent ice from forming in the air duct 100 and affecting the normal operation of the defrosting structure, Figure 5 As shown, step S2 of the defrosting method for the evaporator 3 can be further implemented in the following manner: within the second preset time t2 when the driving component 300 is turned on, the air outlet pressure of the air outlet end 120 is compared with the preset pressure; if the air outlet pressure is always greater than or equal to the preset pressure, the driving component 300 is shut down after the second preset time t2 is turned on; if the air outlet pressure is less than the preset pressure, the inside of the air duct 100 is heated.

[0061] In this embodiment, when the outlet pressure value of the air outlet end 120 is low, for example, when the outlet pressure value of the air outlet end 120 is less than P1, it indicates that there is a risk of ice blockage in the air duct 100, and the air flow cannot flow smoothly in the air duct 100. At this time, the ice blockage in the air duct 100 is melted by heating the air duct 100 for a third preset time t3, thereby restoring the flow of air inside the air duct 100. In this step, the outlet pressure of the air outlet end 120 can be detected by the pressure sensor 600 disposed at the air outlet end 120 of the air duct 100, and the heating of the air duct 100 can be performed by activating the auxiliary heating element 700 disposed in the air duct 100. The third preset time t3 can be set comprehensively based on the operating conditions of the auxiliary heating element 700 and the inner diameter of the air duct 100, for example, the third preset time t3 can be set to 1 minute.

[0062] When the outlet pressure value of the air outlet end 120 is low, after heating the air duct 100 for the third preset time t3, it is necessary to further optimize the operating time of the drive assembly 300 to meet the auxiliary defrosting requirements after the air duct 100 is unblocked. This embodiment further configures the operation of the drive assembly 300 as follows: after heating the air duct 100 for the third preset time t3, heating is stopped, and the drive assembly 300 is delayed for a fourth preset time t4. If the total operating time of the drive assembly 300 is still within the second preset time t2 after the fourth preset time t4 is delayed, the drive assembly 300 will continue to operate according to the original design and shut down after completing the second preset time t2. If the total operating time of the drive assembly 300 exceeds the second preset time t2 after the fourth preset time t4 is delayed, the drive assembly 300 will shut down after completing the fourth preset time t4.

[0063] The present application also provides a storage medium (computer-readable storage medium). The storage medium stores one or more programs. The storage medium may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive; and the memory may also include a combination of the aforementioned types of memory.

[0064] When one or more programs in the storage medium can be executed by one or more processors, the evaporator defrosting method executed in the refrigeration cycle system can be implemented.

[0065] The processor is used to execute the defrost program of the evaporator stored in the memory to implement the following steps of the defrost method:

[0066] Step S1: Defrosting the evaporator by heating for a first preset time t1. In this step, the double layer on the evaporator's surface is melted by heating, thereby achieving preliminary defrosting. The heating process is specifically performed by the main heating element. The first preset time t1 is the duration of the scheduled defrost of the evaporator. The first preset time t1 can be appropriately set based on the degree of frost on the evaporator and the specific operating conditions of the main heating element. For example, the first preset time t1 can be set to 10 minutes.

[0067] In step S2, the drive component is turned on for the second preset time t2, and the drive airflow flows from the air inlet end to the air outlet end. This step belongs to the auxiliary defrosting stage. After the drive component is started, a continuous airflow is formed in the airway. The negative pressure suction effect of the throat can directly suck away the solid frost remaining on the evaporator. At the same time, the suction pipe draws away the gas with a high moisture content in the first chamber where the evaporator is located in the form of suction, thereby reducing the humidity and heat in the evaporator chamber, avoiding incomplete droplets of defrosted water, and directly freezing after cooling again, which affects the refrigeration efficiency. The second preset time t2 is the working time of the drive component. When the drive component includes an air inlet fan and an air outlet fan, the second preset time t2 is the simultaneous operation time of the two fans. The second preset time t2 can be specifically designed according to the working conditions of the drive component and the residual degree of the evaporator after timed defrosting. For example, the second preset time t2 can be set to 5 minutes.

[0068] In some embodiments, within the second preset time t2 when the drive component is turned on, the air outlet pressure at the air outlet end is compared with the preset pressure; if the air outlet pressure is always greater than or equal to the preset pressure, the drive component is shut down after being turned on for the second preset time t2; if the air outlet pressure is less than the preset pressure, the inside of the air duct is heated.

[0069] In some embodiments, after heating the air duct for a third preset time t3, heating is stopped, and the drive assembly is delayed for a fourth preset time t4. If, after the fourth preset time t4, the total operating time of the drive assembly is still within the second preset time t2, the drive assembly will continue to operate according to the original design and then shut down after completing the second preset time t2. If, after the fourth preset time t4, the total operating time of the drive assembly has exceeded the second preset time t2, the drive assembly will shut down after completing the fourth preset time t4.

[0070] Professionals should also be further aware that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0071] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0072] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of this application. It should be understood that the above description is only the specific implementation methods of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A defrosting structure for an evaporator, characterized in that: include: An air duct having an air inlet end and an air outlet end, wherein at least one suction portion is formed on the air duct, and the suction portion includes a contraction section with a gradually decreasing diameter, a throat, and a diffusion section with a gradually increasing diameter, which are sequentially arranged; a suction pipe, one end of which is in communication with the throat; and A driving component, configured to drive the airflow from the air inlet end to the air outlet end; The air duct includes a transverse section located above the evaporator and longitudinal sections located on both sides of the evaporator, and a plurality of suction parts are provided, each of which includes an upper suction part provided on the transverse section and a lower suction part located on the longitudinal section. The suction pipe includes an upper suction pipe connected to the upper suction part and a lower suction pipe connected to the lower suction part, an end of the upper suction pipe away from the upper suction part is located above the evaporator, and an end of the lower suction pipe away from the lower suction part is located in the lower middle part of the evaporator.

2. The defrosting structure of the evaporator according to claim 1, characterized in that: The driving component is a fan or an air pump.

3. The defrosting structure of the evaporator according to claim 1, characterized in that: The driving assembly includes an air inlet fan arranged at the air inlet end and an air outlet fan arranged at the air outlet end.

4. The defrosting structure of the evaporator according to claim 1, characterized in that: It also includes a pressure sensor, which is used to detect the pressure of the air outlet.

5. The defrosting structure of the evaporator according to claim 4, characterized in that: An auxiliary heating element is arranged in the air duct.

6. A refrigeration cycle system comprising a compressor, a condenser and an evaporator interconnected by pipelines, wherein the evaporator is located in a first chamber, characterized in that: The refrigeration cycle system further includes a main heating element and a defrost structure according to any one of claims 1 to 5, wherein the main heating element is arranged in the first chamber to heat and defrost the evaporator, and an end of the suction pipe away from the throat is located in the first chamber.

7. The refrigeration cycle system according to claim 6, characterized in that: The compressor is located in the second chamber, and the air inlet end is connected to the second chamber.

8. A refrigerator, characterized in that: A refrigeration cycle system comprising the refrigeration cycle system according to claim 6 or 7.

9. A defrosting method for an evaporator, using the defrosting structure according to any one of claims 1 to 5, characterized in that: The defrosting method comprises: heating and defrosting the evaporator for a first preset time; The driving component is turned on for a second preset time, driving the air flow from the air inlet end to the air outlet end.

10. The defrosting method according to claim 9, characterized in that: During a second preset time when the driving component is turned on, comparing the air outlet pressure of the air outlet end with a preset pressure; If the air outlet pressure is always greater than or equal to the preset pressure, the driving component is shut down after being turned on for a second preset time; If the air outlet pressure is lower than the preset pressure, the interior of the air duct is heated.

11. A storage medium, characterized in that: The storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to implement the defrosting method for the evaporator according to claim 9 or 10.

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