CN112944598B - Defrost control method, device and air conditioner - Google Patents

Abstract

The invention provides a defrosting control method, a device and an air conditioner, and relates to the technical field of air conditioners. The defrosting control method includes: controlling the air conditioner to operate in a heating mode; obtaining the minimum outer disk temperature value of the air conditioner in a preset time period of a current operation cycle; Defrost temperature value; according to the minimum outer disk temperature value of the current operation cycle and the outer disk defrost temperature value of the previous operation cycle, adjust the guaranteed operation time of the air conditioner entering the guaranteed bottom defrost mode in the current operation cycle. When the air conditioner enters the current operating cycle, obtain the outer disk defrosting temperature value that entered the bottom-guaranteed defrosting mode in the previous operating cycle, and adjust the bottom-guaranteed temperature value of the current operating cycle according to the minimum outer disk temperature value in the preset time period in the current operating cycle The defrosting time of the current operating cycle can be adjusted to reduce the number of defrosting times and improve the user's comfort.

Description

Defrost control method, device and air conditioner

technical field

The present invention relates to the technical field of air conditioners, and in particular, to a defrosting control method and device, and an air conditioner.

Background technique

When the air conditioner operates in the heating mode, if the outdoor temperature is low, frost will gradually form on the outdoor condenser, and if the frost layer is thick to a certain extent, the condenser will be completely blocked, and the effect of heat exchange with the air will be lost, which will affect the heating. effect, so it must be defrosted when thick frost is formed. At present, the basic defrost control is basically added to the conventional defrost control, that is, in order to prevent the defrost logic from having loopholes, the defrost is not timely, resulting in the phenomenon that the frost layer is too thick and the fan blades are damaged. , must defrost conditions. The defrost mode is mostly cooling mode, and the cold air will be blown into the room. Generally, in the defrost control, the bottom defrost time is fixed. When there is no frost on the condenser or the frost layer is thin and no defrosting is required, it will also enter the bottom guarantee. The defrosting mode makes the number of defrosting more frequent, resulting in poor indoor comfort.

SUMMARY OF THE INVENTION

The problem solved by the present invention is how to reduce the number of defrosting times and improve user comfort.

In order to solve the above problems, the present invention provides a defrosting control method, device and air conditioner.

In a first aspect, an embodiment of the present invention provides a defrost control method, the defrost control method comprising:

Control the air conditioner to operate in heating mode;

obtaining the minimum outer disk temperature value of the air conditioner within a preset time period of the current operating cycle;

Obtain the outer disk defrosting temperature value when the air conditioner enters the bottom-guaranteed defrosting mode in the last operating cycle;

According to the minimum outer disk temperature value of the current operation period and the outer disk defrost temperature value of the previous operation period, the minimum guaranteed operation time of the air conditioner entering the minimum guaranteed defrost mode in the current operation period is adjusted.

When the air conditioner enters the current operating cycle, obtain the outer disk defrosting temperature value that entered the bottom-guaranteed defrosting mode in the previous operating cycle, and adjust the bottom-guaranteed temperature value of the current operating cycle according to the minimum outer disk temperature value in the preset time period in the current operating cycle The defrosting time of the current operating cycle can be adjusted to reduce the number of defrosting times and improve the user's comfort.

In an optional embodiment of the present invention, the air conditioner enters the guaranteed bottom defrost in the current operation cycle according to the minimum outer disk temperature value of the current operation cycle and the outer disk defrost temperature value of the previous operation cycle. The steps for the guaranteed run time of the pattern include:

judging whether the first difference between the minimum outer disk temperature value of the current operating cycle and the outer disk defrosting temperature value of the previous operating cycle is greater than a first set value;

If the first difference is smaller than the first set value, set a first preset time greater than the bottom-guaranteed running time of the previous operation cycle as the bottom-guaranteed operation of the air conditioner entering the bottom-guaranteed defrosting mode in the current running cycle time.

In an optional embodiment of the present invention, the defrosting control method further includes:

If the first difference is greater than or equal to the first set value, set the bottom-guaranteed running time of the previous operation cycle as the bottom-guaranteed running time of the air conditioner entering the bottom-guaranteed defrosting mode in the current running cycle.

In an optional embodiment of the present invention, the defrosting control method further includes:

acquiring the real-time outer disk temperature value of the air conditioner in the current operating cycle;

obtaining the running time of the air conditioner in the current running cycle;

The air conditioner is controlled to enter a defrost mode according to the real-time outer disk temperature value and the running time.

In an optional embodiment of the present invention, the defrost mode includes a bottom-guarantee defrost mode, and the step of controlling the air conditioner to enter the bottom-guarantee defrost mode according to the real-time outer disk temperature value and the operating time includes:

Judging whether the real-time outer disk temperature value is less than the guaranteed bottom temperature value;

If the real-time outer disk temperature value is less than the guaranteed minimum temperature value, determine whether the operating time of the air conditioner is greater than the guaranteed minimum operating time;

If the running time is greater than the bottom-guaranteed running time, the air conditioner is controlled to enter the bottom-guaranteed defrosting mode.

In an optional embodiment of the present invention, the step of controlling the air conditioner to enter the bottom-guarantee defrosting mode according to the real-time outer disk temperature value and the running time further includes:

If the real-time outer disk temperature value is greater than or equal to the guaranteed bottom temperature value or the operating time is less than or equal to the guaranteed bottom operating time, the air conditioner is continued to be controlled to operate the heating mode.

In an optional embodiment of the present invention, after the step of controlling the air conditioner to enter the bottom-guaranteed defrosting mode, the defrosting control method further includes:

Record the defrosting temperature value of the outer disk when the air conditioner enters the bottom-guaranteed defrosting mode.

In an optional embodiment of the present invention, the defrosting mode includes a normal defrosting mode, and the defrosting control method further includes:

calculating a second difference between the real-time outer disk temperature value and the minimum outer disk temperature value;

judging whether the second difference is greater than or equal to a second set value;

If the second difference is greater than or equal to the second set value, determine whether the running time is greater than or equal to the defrost set time;

If the running time is greater than or equal to the defrosting set time, the air conditioner is controlled to enter a normal defrosting mode.

In an optional embodiment of the present invention, the defrosting control method further includes:

If the second difference is less than the second set value or the running time is less than or equal to the defrost set time, the step of judging whether the real-time outer disk temperature value is less than the guaranteed bottom temperature value is performed.

In a second aspect, an embodiment of the present invention provides a defrost control device, including:

The startup module is used to control the air conditioner to run the heating mode;

a minimum acquisition module, configured to acquire the minimum outer disk temperature value of the air conditioner within a preset time period of the current operating cycle;

a first acquiring module, configured to acquire the outer disk defrosting temperature value when the air conditioner enters the bottom-guaranteed defrosting mode in the last operating cycle of the air conditioner;

The operation module is configured to adjust the minimum guaranteed operation time of the air conditioner entering the guaranteed minimum defrost mode in the current operation period according to the minimum outer disk temperature value of the current operation period and the outer disk defrost temperature value of the previous operation period.

In a third aspect, an embodiment of the present invention provides an air conditioner, including a controller, where the controller is configured to execute computer instructions to implement the defrosting control method provided in the first aspect.

Description of drawings

FIG. 1 is a block diagram of an air conditioner provided by an embodiment of the present invention.

FIG. 2 is a flowchart of a defrosting control method provided by an embodiment of the present invention.

FIG. 3 is a flowchart of sub-steps of step S400 of the defrosting control method provided by the embodiment of the present invention.

FIG. 4 is a flowchart of sub-steps of step S700 of the defrosting control method provided by the embodiment of the present invention.

FIG. 5 is a block diagram of a defrost control device provided by an embodiment of the present invention.

Description of reference numerals: 10-air conditioner; 11-controller; 12-timer; 13-temperature sensor; 20-defrost control device; 21-starting module; 22-minimum acquisition module; 23-first acquisition module; 24-running module; 25-real-time acquisition mode; 26-time acquisition module; 27-defrosting module.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example

Referring to FIG. 1 , an embodiment of the present invention provides a defrosting control method and device. The defrosting control method and device provided in this embodiment are applied to an air conditioner 10 , which can reduce the number of defrosts and improve user comfort.

When the air conditioner 10 operates in the heating mode, if the outdoor temperature is low, frost will gradually form on the outdoor condenser, and if the frost layer is thick to a certain extent, the condenser will be completely blocked, and the effect of heat exchange with the air will be lost, which will affect the cooling system. Thermal effect, so defrosting must be carried out when thick frost is formed. At present, the basic defrost control is basically added to the conventional defrost control, that is, in order to prevent the defrost logic from having loopholes, the defrost is not timely, resulting in the phenomenon that the frost layer is too thick and the fan blades are damaged. , must defrost conditions. The defrost mode is mostly cooling mode, and the cold air will be blown into the room. Generally, in the defrost control, the bottom defrost time is fixed. When there is no frost on the condenser or the frost layer is thin and no defrosting is required, it will also enter the bottom guarantee. The defrosting mode makes the number of defrosting more frequent, resulting in poor indoor comfort. The defrosting control method provided in this embodiment can improve the above problems.

The air conditioner 10 includes a controller 11 , a timer 12 and a temperature sensor 13 . The timer 12 is used to detect the running time of the air conditioner 10 , and the temperature sensor 13 is used to detect the minimum outer disk temperature value and the outer disk defrost temperature value.

In the defrosting control method and device provided in this embodiment, the determination of the bottom guarantee condition is newly added, and the bottom guarantee operation time of the bottom guarantee defrost mode can be adjusted.

It is easy to understand that the bottom-guaranteed operation time described in this embodiment refers to the running time of the air conditioner 10 entering the bottom-guaranteed defrosting mode.

Please refer to Figure 2, the specific steps are as follows:

In step S100, the air conditioner 10 is controlled to operate in a heating mode.

In this embodiment, when the air conditioner 10 operates in the heating mode, the outdoor condenser may form frost, and the air conditioner 10 may need to perform defrosting treatment only when the air conditioner 10 operates in the heating mode.

Step S200, acquiring the minimum outer disk temperature value of the air conditioner 10 within a preset time period of the current operation cycle.

In this embodiment, one operation cycle can be regarded as a defrost cycle, and an operation cycle generally starts from the end of the previous operation cycle and ends after the defrost in the current operation cycle is completed. The first operating cycle starts at power-on.

Wherein, in order to improve the accuracy of the obtained minimum outer disk temperature value, the preset time period is generally the 7th to 12th minutes after entering the current operation cycle. That is to say, the preset time period is 7min to 12min.

It is easy to understand that the minimum outer disk temperature value refers to the outer disk temperature value with the smallest value among the plurality of outer disk temperature values acquired within a preset time period.

Step S300, acquiring the outer disk defrosting temperature value when the air conditioner 10 enters the bottom-guaranteed defrosting mode in the last operating cycle.

In this embodiment, if the air conditioner 10 enters the bottom-guaranteed defrost mode in the previous operation cycle, the outer disk defrost temperature value refers to the temperature value of the outer disk when the air conditioner 10 enters the bottom-guarantee defrost mode.

Obtain the outer disk defrost temperature value of the last operation cycle that entered the bottom-guaranteed defrost mode, and can judge the degree of frost formation on the condenser when entering the bottom-guarantee defrost mode through the outer disk defrost temperature value. A low value of the outer disk defrost temperature indicates that there is more frost on the condenser when entering the bottom-guarantee defrost mode. If the outer disk defrost temperature value is high, it means that there is less frost on the condenser when entering the bottom-guarantee defrost mode.

Step S400, according to the minimum outer disk temperature value of the current operation cycle and the outer disk defrost temperature value of the previous operation cycle, adjust the minimum guaranteed operation time of the air conditioner 10 entering the minimum guaranteed defrost mode in the current operation period.

In this embodiment, as mentioned above, the frosting condition of the condenser in the previous operation cycle can be determined according to the defrosting temperature value of the outer disk in the previous operation period, and the minimum outer disk temperature value of the current operation period and the outer disk temperature value of the previous operation period can be judged. The defrost temperature value can judge whether the current cycle is suitable to extend the guaranteed running time of the previous running cycle, and whether the guaranteed running time needs to be adjusted.

Please refer to FIG. 3, wherein step S400 may include step S410, step S420 and step S430.

Step S410, judging whether the first difference between the minimum outer disk temperature value of the current operation cycle and the outer disk defrost temperature value of the previous operation cycle is greater than the first set value.

First calculate the first difference between the minimum outer disk temperature value of the current operating cycle and the outer disk defrosting temperature value of the previous operating cycle, and then determine whether the first difference is greater than the first set value.

Among them, the first set value is generally set at the factory, which is approximately 1°C to 4°C. If the first difference is greater than the first set value, it indicates that the first difference between the minimum outer disk temperature value and the outer disk defrost temperature value is relatively large, and if the first difference value is less than or equal to the first set value, it indicates that the minimum outer disk temperature The first difference between the value and the outer disk defrost temperature value is relatively small.

Step S420, if the first difference is less than the first set value, set the first preset time greater than the bottom-guaranteed running time of the previous operation cycle as the bottom-guaranteed running time of the air conditioner 10 entering the bottom-guaranteed defrosting mode in the current running cycle.

In this embodiment, if the first difference value is smaller than the first set value, it means that in the last operating cycle, before entering the bottom-guarantee defrosting mode, the outer disk defrost temperature value decreased less, and the last cycle entered the In the bottom-guaranteed defrosting mode, the condenser is less frosted, and the bottom-guaranteed running time can be appropriately extended in the current cycle. Therefore, the first preset time greater than the bottom-guaranteed running time of the previous running cycle is set as the bottom-guaranteed running time of the current running cycle.

The first preset time may be a fixed value, or may be set according to the first difference value. For example, the smaller the first difference, the less the drop in the outer disk defrosting temperature value in the last operating cycle, and a longer first preset time can be set. That is to say, the first difference is inversely proportional to the first preset time, the smaller the first difference, the longer the set first preset time, and the larger the first difference, the shorter the set first preset time.

Step S430 , if the first difference is greater than or equal to the first set value, set the bottom-guaranteed running time of the previous operation cycle as the bottom-guaranteed running time of the air conditioner 10 entering the bottom-guaranteed defrosting mode in the current running cycle.

When the first difference is greater than or equal to the first set value, it means that before entering the bottom-guarantee defrosting mode in the last operation cycle, the defrosting temperature value of the outer disk drops greatly, the condenser frosting speed is faster, and the last one is reserved. The minimum guaranteed running time of the running cycle, the minimum guaranteed running time of the previous running cycle is regarded as the guaranteed minimum running time of the current running cycle.

It should be noted that, if the last operation cycle is the first operation cycle after the startup, the guaranteed minimum operation time of the operation cycle is preset.

Please continue to refer to FIG. 1 , step S500 , obtaining the real-time outer disk temperature value of the air conditioner 10 in the current operating cycle.

In this embodiment, the real-time outer disk temperature value refers to the outer disk temperature value obtained after a preset time period, that is, the real-time outer disk temperature value is obtained at different times after entering the 12th minute of the current operation cycle. Outer disk temperature value.

Step S600, obtaining the running time of the air conditioner 10 in the current running cycle.

In this embodiment, the running time of the current running cycle refers to the time value accumulated after the end of the previous running cycle.

In step S700, the air conditioner 10 is controlled to enter the defrost mode according to the real-time outer disk temperature value and the running time.

There are two possibilities for the air conditioner 10 to enter the defrost mode. One is that the amount of frost on the condenser is relatively large and the operation time is relatively long. The defrost mode is set to enter the defrost mode in this case. Another situation is that there is less frost on the condenser, which is not enough to enter the normal defrost mode. In order to ensure the normal operation of the air conditioner 10, when the amount of frost on the condenser is relatively large but does not meet the requirements of the normal defrost mode. The amount of frost and the operating time are relatively large, but it does not reach the amount of frost required by the normal defrosting mode. In order to ensure that the air conditioner 10 can operate normally, the defrosting process will still be performed. For the bottom protection defrost mode.

Referring to FIG. 4 , step S700 may include step S710 , step S720 , step S730 , step S740 , step S750 , step S760 , step S770 , step S780 and step S790 .

Step S710: Calculate the second difference between the real-time outer disk temperature value and the minimum outer disk temperature value.

Calculating the second difference value can determine the change of the outer disk temperature value. If the second difference value is larger, the outer disk temperature value changes rapidly, and the outer disk temperature value changes faster, indicating that the current condenser frost is faster. If the second difference is small, it means that the temperature value of the outer disk changes slowly, and the temperature value of the outer disk changes quickly, indicating that the current condenser frost is slow. The frost formation speed of the condenser in the current operation cycle can be determined according to the second difference.

Step S720, determine whether the second difference is greater than or equal to the second set value.

The second set value is roughly in the range of 4°C to 8°C. If the second difference value is greater than or equal to the second set value, it can be considered that the frosting speed of the condenser is too fast in the current operating cycle. For example, the second difference value is less than The second set value can be considered that the frosting speed of the condenser in the current operating cycle is relatively slow, and the frosting speed of the outdoor unit in the current operating cycle can be judged by the magnitude relationship between the second difference and the second set value.

Step S730, if the second difference is greater than or equal to the second set value, determine whether the running time is greater than or equal to the defrost set time.

If the second difference is greater than or equal to the second set value, it can be considered that the temperature value of the outer plate of the condenser drops rapidly, and the frost may be formed faster, and the operating time in the current operating cycle is further judged.

If only the second difference is used to control the air conditioner 10 to enter the defrost mode, it is possible that the condenser will freeze too quickly and the air conditioner 10 will enter the defrost mode frequently, which will affect the comfort of the user. Therefore, the operating time needs to be set. Whether the defrost set time is reached to prevent the air conditioner 10 from entering the defrost mode frequently.

Step S740, if the running time is greater than or equal to the defrosting set time, the air conditioner 10 is controlled to enter the normal defrosting mode.

If the running time is greater than or equal to the defrosting set time and the second difference is greater than or equal to the second set value, it means that the condition for normal defrosting is reached within the current operating cycle, and the air conditioner 10 enters the normal defrosting mode. Start defrosting. After defrosting is completed, the current operation cycle ends and the next operation cycle is entered.

It should be noted that, in this embodiment, step S730 is executed first and then step S740 is executed, that is, it is first judged whether the second difference is greater than or equal to the second set value, and then whether the running time is greater than or equal to the defrost setting time. In other embodiments of the present invention, step S740 may be executed first and then step S730 may be executed to first determine whether the running time is greater than or equal to the defrosting set time, and if the running time is greater than or equal to the defrosting set time, the second difference Whether the value is greater than or equal to the second set value.

Step S750, if the second difference is less than the second set value or the running time is less than the set defrost time, it is determined whether the real-time outer disk temperature value is less than the guaranteed bottom temperature value.

If the second difference is less than the second set value or the running time is less than the defrost set time, it means that the normal defrost mode is not currently met, and the judgment of the bottom-guaranteed defrost mode is entered, and it is judged whether the real-time outer disk temperature value is less than the bottom-guarantee temperature value.

Under normal circumstances, the guaranteed bottom temperature value is relatively small, about -13℃～-16℃. If the real-time outer disk temperature value is lower than the guaranteed bottom temperature value, it means that there may be a thin frost on the current condenser, and the bottom guaranteed defrosting may be required, so as to The normal operation of the air conditioner 10 is ensured, and it is avoided that the condensation is too thick to block the condenser and cause the heating effect to deteriorate.

In step S760, if the real-time outer disk temperature value is less than the guaranteed bottom temperature value, it is determined whether the running time of the air conditioner 10 is greater than or equal to the guaranteed bottom running time.

Similarly, if the real-time outer disk temperature value is lower than the guaranteed bottom temperature value, it will enter the guaranteed bottom defrosting mode immediately. Under the condition that the outdoor ambient temperature is low, the real-time outer disk temperature value itself is relatively low, which may cause the air conditioner 10 to enter the guaranteed bottom defrost mode frequently. mode, thereby affecting user comfort.

By setting the guaranteed minimum running time, even if the real-time outer disk temperature value is lower than the guaranteed minimum temperature value, it is necessary to run the minimum guaranteed running time before entering the guaranteed minimum defrosting mode, which can defrost the condenser and ensure the user's comfort.

Step S770 , if the running time is greater than or equal to the bottom-guaranteed running time, the air conditioner 10 is controlled to enter the bottom-guaranteed defrosting mode.

In this embodiment, if the running time is longer than the guaranteed minimum running time, the air conditioner 10 is controlled to enter the guaranteed bottom defrosting mode until the defrosting is completed, and the current operation cycle ends and the next operation cycle is entered.

Step S780, record the outer disk defrost temperature value when the air conditioner 10 enters the bottom-guaranteed defrost mode.

In this embodiment, if the air conditioner 10 enters the bottom-guaranteed defrosting mode, the outer disk defrost temperature value in the bottom-guaranteed defrosting mode is recorded, so as to facilitate adjustment of the bottom-guarantee time in the next operation cycle.

Step S790, if the real-time outer disk temperature value is greater than or equal to the guaranteed bottom temperature value or the running time is less than the guaranteed bottom running time, continue to control the air conditioner 10 to operate the heating mode.

In this embodiment, if the real-time outer disk temperature value is greater than or equal to the guaranteed bottom temperature value or the running time is less than the guaranteed bottom running time, it means that the current condenser does not need defrosting treatment, and the current heating mode continues to run.

It should be noted that the defrosting methods of the normal defrosting mode and the bottom-guaranteing defrosting mode may be the same or different.

Steps S500 to S790 all refer to the current operation cycle. Among them, the minimum outer disk temperature value and the guaranteed minimum operating time, if not specified, can be considered as the minimum outer disk temperature value and guaranteed minimum operating time of the current operation cycle.

The working principle of the defrosting control method provided in this embodiment: In this embodiment, when the air conditioner 10 enters the current operating cycle, the outer disk defrosting temperature value that entered the bottom-guaranteed defrosting mode in the previous operating cycle is obtained, and according to the current operating cycle The minimum outer disk temperature value of the preset time period in the operation cycle can adjust the bottom-guaranteed defrosting time of the current operation cycle, and judge whether to enter the normal defrost mode according to the minimum outer disk temperature value, operating time, and real-time outer disk temperature value. After the normal defrosting mode, it is judged whether to enter the bottom-guaranteed defrosting mode according to the real-time outer disk temperature value and the running time.

To sum up, in the defrosting control method provided in this embodiment, in this embodiment, when the air conditioner 10 enters the current operating cycle, the outer disk defrosting temperature value of the last operating cycle entering the bottom-guaranteed defrosting mode is obtained, and the The bottom-guaranteed defrosting time of the current operating cycle can be adjusted according to the minimum outer disk temperature value of the preset time period in the current operating cycle, which can adjust the bottom-guaranteed defrosting time of the current operating cycle, reduce the number of defrosts, and improve user comfort.

Referring to FIG. 5 , an embodiment of the present invention further provides a defrost control device 20, which includes:

The startup module 21 is used to control the air conditioner 10 to operate in the heating mode.

Step S100 of the defrosting control method provided by the embodiment of the present invention may be executed by the startup module 21 .

The minimum acquisition module 22 is configured to acquire the minimum outer disk temperature value of the air conditioner 10 within a preset time period of the current operation cycle.

Step S200 of the defrosting control method provided by the embodiment of the present invention may be performed by the minimum obtaining module 22 .

The first obtaining module 23 is configured to obtain the outer disk defrosting temperature value when the air conditioner 10 enters the bottom-guaranteed defrosting mode in the last operating cycle.

Step S300 of the defrosting control method provided by the embodiment of the present invention may be executed by the first obtaining module 23 .

The operation module 24 is configured to adjust the minimum guaranteed operation time of the air conditioner 10 entering the guaranteed minimum defrost mode in the current operation period according to the minimum outer disk temperature value of the current operation period and the outer disk defrost temperature value of the previous operation period.

Step S400 and its sub-steps of the defrosting control method provided by the embodiment of the present invention may be executed by the operation module 24 .

The real-time acquisition mode 25 is used to acquire the real-time outer disk temperature value of the air conditioner 10 in the current operation cycle.

Step S500 of the defrosting control method provided by the embodiment of the present invention may be performed by a real-time acquisition module.

The time acquisition module 26 is configured to acquire the operation time of the air conditioner 10 in the current operation cycle.

Step S600 of the defrosting control method provided by the embodiment of the present invention may be executed by the time acquisition module 26 .

The defrosting module 27 is used to control the air conditioner 10 to enter the defrosting mode according to the real-time outer disk temperature value and the running time.

Step S700 and its sub-steps of the defrosting control method provided by the embodiment of the present invention may be executed by the defrosting module 27 .

In this embodiment of the present invention, the controller 11 may be an integrated circuit chip, which has a signal processing capability. The above-mentioned controller 11 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a single-chip microcomputer, a microcontroller unit (Microcontroller Unit, MCU), a complex programmable logic device (Complex Programmable Logic Device, CPLD) , Field Programmable Gate Array (Field-Programmable GateArray, FPGA), Application Specific Integrated Circuit (ASIC), Embedded ARM and other chips, the controller 11 can implement or execute the methods disclosed in the embodiments of the present invention , steps and logic diagram.

In a feasible implementation manner, the air conditioner 10 may further include a memory to store program instructions that can be executed by the controller 11. For example, the defrost control device 20 provided in this embodiment of the present application includes at least one software or firmware stored in memory. The memory can be an independent external memory, including but not limited to random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only Memory, PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM). The memory can also be integrated with the controller 11 , for example, the memory can be integrated with the controller 11 in the same chip.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (8)

1. a defrosting control method, is characterized in that, described defrosting control method comprises: controlling the air conditioner (10) to operate in the heating mode; acquiring the minimum outer disk temperature value of the air conditioner (10) within a preset time period of the current operating cycle; Obtain the outer disk defrosting temperature value when the air conditioner (10) enters the bottom-guaranteed defrosting mode in the last operating cycle; According to the minimum outer disk temperature value of the current operation period and the outer disk defrost temperature value of the previous operation period, the minimum guaranteed operation time of the air conditioner (10) entering the minimum guaranteed defrost mode in the current operation period is adjusted; The defrosting mode includes a bottom-guaranteed defrosting mode and a normal defrosting mode; The defrosting control method also includes: acquiring the real-time outer disk temperature value of the air conditioner (10) in the current operating cycle; obtaining the running time of the air conditioner (10) in the current running cycle; controlling the air conditioner (10) to enter a defrost mode according to the real-time outer disk temperature value and the running time; The defrost mode includes a bottom-guarantee defrost mode, and the step of controlling the air conditioner (10) to enter the bottom-guarantee defrost mode according to the real-time outer disk temperature value and the running time includes: Judging whether the real-time outer disk temperature value is less than the guaranteed bottom temperature value; If the real-time outer disk temperature value is less than the guaranteed minimum temperature value, determine whether the operating time of the air conditioner (10) is greater than the guaranteed minimum operating time; If the operating time is greater than the guaranteed minimum operating time, controlling the air conditioner (10) to enter the minimum guaranteed defrosting mode; The defrosting control method also includes: calculating a second difference between the real-time outer disk temperature value and the minimum outer disk temperature value; judging whether the second difference is greater than or equal to a second set value; If the second difference is greater than or equal to the second set value, determine whether the running time is greater than or equal to the defrost set time; If the running time is greater than or equal to the defrosting set time, the air conditioner (10) is controlled to enter a normal defrosting mode. 2 . The defrosting control method according to claim 1 , wherein the adjustment of the current operating cycle is performed according to the minimum outer disk temperature value of the current operating cycle and the outer disk defrosting temperature value of the previous operating cycle. 3 . The steps for the air conditioner (10) to enter the bottom-guaranteed running time of the bottom-guaranteed defrosting mode include: Determine whether the first difference between the minimum outer disk temperature value of the current operation cycle and the outer disk defrost temperature value of the previous operation cycle is greater than a first set value; If the first difference is less than the first set value, set a first preset time greater than the bottom-guaranteed running time of the previous operation cycle as the current running cycle and the air conditioner (10) enters the bottom-guaranteed defrosting mode guaranteed operating time. 3. The defrosting control method according to claim 2, wherein the defrosting control method further comprises: If the first difference is greater than or equal to the first set value, set the bottom-guaranteed running time of the previous operation cycle as the bottom-guaranteed operation of the air conditioner (10) entering the bottom-guaranteed defrosting mode in the current running cycle time. 4. The defrosting control method according to claim 1, wherein the step of controlling the air conditioner (10) to enter a bottom-guaranteed defrosting mode according to the real-time outer disk temperature value and the running time further comprises: If the real-time outer disk temperature value is greater than or equal to the guaranteed bottom temperature value or the running time is less than or equal to the guaranteed bottom running time, the air conditioner (10) is continuously controlled to operate the heating mode. The defrosting control method according to claim 1, characterized in that after the step of controlling the air conditioner (10) to enter the bottom-guaranteed defrosting mode, the defrosting control method further comprises: Record the defrosting temperature value of the outer disk when the air conditioner (10) enters the bottom-guaranteed defrosting mode. 6. The defrosting control method according to claim 1, wherein the defrosting control method further comprises: If the second difference is less than the second set value or the running time is less than the defrost set time, the step of judging whether the real-time outer disk temperature value is less than the guaranteed bottom temperature value is performed. 7. A defrosting control device, characterized in that, comprising: a startup module (21) for controlling the air conditioner (10) to operate in a heating mode; a minimum acquisition module (22), configured to acquire the minimum outer disk temperature value of the air conditioner (10) within a preset time period of the current operating cycle; a first acquiring module (23), configured to acquire the outer disk defrosting temperature value when the air conditioner (10) enters the bottom-guaranteed defrosting mode in the last operating cycle; An operation module (24), configured to adjust the air conditioner (10) in the current operation cycle to enter the bottom-guaranteed defrost mode according to the minimum outer disk temperature value of the current operation cycle and the outer disk defrost temperature value of the previous operation cycle guaranteed minimum operating time; The defrosting mode includes a bottom-guaranteed defrosting mode and a normal defrosting mode; The defrosting control device (20) further includes: a real-time acquisition mode (25) for acquiring the real-time outer disk temperature value of the air conditioner (10) in the current operating cycle; a time acquisition module (26), configured to acquire the operation time of the air conditioner (10) in the current operation cycle; a defrosting module (27), configured to control the air conditioner (10) to enter a defrosting mode according to the real-time outer disk temperature value and the running time; The defrosting module (27) is configured to determine whether the real-time outer disk temperature value is less than the guaranteed bottom temperature value; if the real-time outer disk temperature value is less than the guaranteed bottom temperature value, determine the Whether the running time is greater than the guaranteed bottom running time; if the running time is greater than the bottom guaranteed running time, the air conditioner (10) is controlled to enter the bottom guaranteed defrosting mode; The defrosting module (27) is used to calculate the second difference between the real-time outer disk temperature value and the minimum outer disk temperature value; determine whether the second difference is greater than or equal to the second set value; If the second difference is greater than or equal to the second set value, then judge whether the running time is greater than or equal to the defrosting set time; if the running time is greater than or equal to the defrosting set time, control the air conditioner (10) Enter the normal defrost mode. 8 . An air conditioner, characterized by comprising a controller ( 11 ), the controller ( 11 ) being configured to execute computer instructions to implement the defrosting control method according to any one of claims 1 to 6 .

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