CN112944598B

CN112944598B - Defrosting control method and device and air conditioner

Info

Publication number: CN112944598B
Application number: CN202110292866.4A
Authority: CN
Inventors: 原惠惠; 陈伟; 应必业
Original assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Current assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2022-05-13
Anticipated expiration: 2041-03-18
Also published as: CN112944598A

Abstract

The invention provides a defrosting control method and device and an air conditioner, and relates to the technical field of air conditioners. The defrosting control method comprises the following steps: controlling the air conditioner to operate in a heating mode; acquiring a minimum outer disc temperature value of the air conditioner in a preset time period of a current operation cycle; acquiring an outer plate defrosting temperature value when the air conditioner enters a bottom-protecting defrosting mode in the last operating period; and adjusting the bottom-protection operation time of the air conditioner entering the bottom-protection defrosting mode in the current operation period according to the minimum outer plate temperature value in the current operation period and the outer plate defrosting temperature value in the previous operation period. When the air conditioner enters the current operation cycle, the outer plate defrosting temperature value of the last operation cycle entering the bottom-preserving defrosting mode is obtained, the bottom-preserving defrosting time of the current operation cycle is adjusted according to the minimum outer plate defrosting temperature value of the preset time period in the current operation cycle, the bottom-preserving defrosting time of the current operation cycle can be adjusted, the defrosting times are reduced, and the comfort level of a user is improved.

Description

Defrosting control method and device and air conditioner

Technical Field

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

Background

When the air conditioner runs in a heating mode, if the outdoor temperature is low, the outdoor condenser gradually frosts, the frost layer is thick to a certain degree, the condenser is completely blocked, the heat exchange effect with air is lost, and the heating effect is influenced, so that the frost must be removed when thick frost is formed. At present, the conventional defrosting control is basically added with bottom-protecting defrosting control, namely, in order to prevent the phenomenon that a defrosting logic has a leak and does not defrost in time, so that a frost layer is too thick and fan blades are damaged, and after the conventional defrosting control is operated at low temperature and low humidity for a certain time, the defrosting condition is needed. The defrosting mode is the refrigeration mode mostly, and cold wind can blow to indoor, and in the defrosting control under general condition, the time of moisturizing and defrosting is fixed, does not have frost or can get into the moisturizing and defrosting mode when the frost layer is thinner need not to defrost on the condenser equally, makes the number of times of defrosting more, leads to indoor comfort relatively poor.

Disclosure of Invention

The invention solves the problem of how to reduce the times of defrosting and improve the comfort of users.

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

In a first aspect, an embodiment of the present invention provides a defrosting control method, where the defrosting control method includes:

controlling the air conditioner to operate in a heating mode;

acquiring a minimum outer disc temperature value of the air conditioner in a preset time period of a current operation cycle;

acquiring an outer plate defrosting temperature value when the air conditioner enters a bottom-protecting defrosting mode in the last operating period;

and adjusting the bottom-protection operation time of the air conditioner entering the bottom-protection defrosting mode in the current operation period according to the minimum outer disk temperature value in the current operation period and the outer disk defrosting temperature value in the last operation period.

When the air conditioner enters the current operation cycle, the outer plate defrosting temperature value of the last operation cycle entering the bottom-preserving defrosting mode is obtained, the bottom-preserving defrosting time of the current operation cycle is adjusted according to the minimum outer plate defrosting temperature value of the preset time period in the current operation cycle, the bottom-preserving defrosting time of the current operation cycle can be adjusted, the defrosting times are reduced, and the comfort level of a user is improved.

In an optional embodiment of the present invention, the step of adjusting the bottom-protection operation time of the air conditioner entering the bottom-protection defrosting mode in the current operation cycle according to the minimum outer tray temperature value in the current operation cycle and the outer tray defrosting temperature value in the previous operation cycle includes:

judging whether a first difference value between the minimum outer plate temperature value of the current operation period and the outer plate defrosting temperature value of the previous operation period is larger than a first set value or not;

and if the first difference is smaller than the first set value, setting a first preset time which is larger than the bottom protection running time of the last running period as the bottom protection running time of the air conditioner entering the bottom protection defrosting mode in the current running period.

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

and if the first difference is larger than or equal to the first set value, setting the bottom-protection running time of the last running period as the bottom-protection running time of the air conditioner entering the bottom-protection defrosting mode in the current running period.

acquiring a real-time outer disc temperature value of the air conditioner in a current operation period;

acquiring the running time of the air conditioner in the current running period;

and controlling the air conditioner to enter a defrosting mode according to the real-time outer disc temperature value and the running time.

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

judging whether the real-time outer disc temperature value is smaller than a bottom-guaranteed temperature value or not;

if the real-time outer disc temperature value is smaller than the bottom-guaranteed temperature value, judging whether the running time of the air conditioner is larger than the bottom-guaranteed running time;

and if the running time is greater than the bottom-protecting running time, controlling the air conditioner to enter a bottom-protecting defrosting mode.

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

and if the real-time outer disc temperature value is greater than or equal to the bottom-guaranteed temperature value or the running time is less than or equal to the bottom-guaranteed running time, continuing to control the air conditioner to run the heating mode.

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

and recording the defrosting temperature value of the outer disc when the air conditioner enters the bottom-protecting 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 value between the real-time outer disc temperature value and the minimum outer disc temperature value;

judging whether the second difference value is larger than or equal to a second set value or not;

if the second difference is larger than or equal to a second set value, judging whether the running time is larger than or equal to defrosting set time;

and if the running time is greater than or equal to the defrosting set time, controlling the air conditioner to enter a normal defrosting mode.

and if the second difference value is smaller than the second set value or the running time is smaller than or equal to the defrosting set time, executing a step of judging whether the real-time outer plate temperature value is smaller than a bottom-protection temperature value.

In a second aspect, an embodiment of the present invention provides a defrosting control apparatus, including:

the starting module is used for controlling the air conditioner to run in a heating mode;

the minimum acquisition module is used for acquiring the minimum outer disc temperature value of the air conditioner in a preset time period of the current operation cycle;

the first acquisition module is used for acquiring an outer plate defrosting temperature value when the air conditioner enters a bottom-preserving defrosting mode in the last operating period;

and the operation module is used for adjusting the bottom-preserving operation time of the air conditioner entering the bottom-preserving defrosting mode in the current operation period according to the minimum outer disc temperature value in the current operation period and the outer disc defrosting temperature value in the last 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.

Drawings

Fig. 1 is a block diagram of an air conditioner according to an embodiment of the present invention.

Fig. 2 is a flowchart of a defrosting control method according to an embodiment of the present invention.

Fig. 3 is a flowchart illustrating sub-steps of step S400 of a defrosting control method according to an embodiment of the present invention.

Fig. 4 is a flowchart illustrating sub-steps of step S700 of a defrosting control method according to an embodiment of the present invention.

Fig. 5 is a block diagram of a defrosting control device according to an embodiment of the present invention.

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

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Examples

Referring to fig. 1, an embodiment of the present invention provides a defrosting control method and device, and the defrosting control method and device provided in this embodiment is applied to an air conditioner 10, and can reduce the number of times of defrosting and improve the comfort of a user.

When the air conditioner 10 operates in the heating mode, if the outdoor temperature is low, frost gradually forms on the outdoor condenser, and the frost layer is thick to a certain degree, the condenser is completely blocked, the heat exchange effect with air is lost, and the heating effect is affected, so that the frost must be removed when the frost forms. At present, the conventional defrosting control is basically added with bottom-protecting defrosting control, namely, in order to prevent the phenomenon that a defrosting logic has a leak and does not defrost in time, so that a frost layer is too thick and fan blades are damaged, and after the conventional defrosting control is operated at low temperature and low humidity for a certain time, the defrosting condition is needed. The defrosting mode is the refrigeration mode mostly, and cold wind can blow to indoor, and in the defrosting control under general condition, the time of moisturizing and defrosting is fixed, does not have frost or can get into the moisturizing and defrosting mode when the frost layer is thinner need not to defrost on the condenser equally, makes the number of times of defrosting more, leads to indoor comfort relatively poor. The defrosting control method provided by the embodiment can improve the problems.

The air conditioner 10 comprises a controller 11, a timer 12 and a temperature sensor 13, wherein the timer 12 is used for detecting the operation time of the air conditioner 10, and the temperature sensor 13 is used for detecting the minimum outer plate temperature value and the outer plate defrosting temperature value.

The defrosting control method and the defrosting control device provided by the embodiment newly add judgment of the bottom protection condition, and can adjust the bottom protection running time of the bottom protection defrosting mode.

It is easily understood that the bottoming operation time described in the present embodiment refers to an operation time of the air conditioner 10 entering the bottoming defrosting mode.

Referring to fig. 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 is operated in the heating mode, frost may be formed on the outdoor condenser, and the defrosting process may be required only when the air conditioner 10 is operated in the heating mode.

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

In this embodiment, one operation cycle may be considered as a defrosting cycle, and one operation cycle generally starts from the end of the previous operation cycle until the end of defrosting in the operation cycle. The first run cycle begins at power-on.

In order to improve the accuracy of the obtained minimum outer disc temperature value, the preset time period is generally from 7min to 12min of the current operation cycle. That is to say, the preset time period is 7min to 12 min.

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

Step S300, obtaining an outer tray defrosting temperature value when the air conditioner 10 enters the bottom-protection defrosting mode in the last operating cycle.

In this embodiment, if the air conditioner 10 enters the bottom-protection defrosting mode in the previous operation cycle, the outer tray defrosting temperature value refers to the temperature value of the outer tray when the air conditioner 10 enters the bottom-protection defrosting mode.

And acquiring an outer plate defrosting temperature value when the last operation cycle enters the bottom-preserving defrosting mode, and judging the frosting degree on the condenser when the operation cycle enters the bottom-preserving defrosting mode according to the outer plate defrosting temperature value. The lower temperature value of the defrosting of the outer plate indicates that more frosting is formed on the condenser when the bottom-preserving defrosting mode is entered, and the higher temperature value of the defrosting of the outer plate indicates that less frosting is formed on the condenser when the bottom-preserving defrosting mode is entered.

Step S400, adjusting the bottom-protection operation time when the air conditioner 10 in the current operation period enters the bottom-protection defrosting mode according to the minimum outer tray temperature value in the current operation period and the outer tray defrosting temperature value in the previous operation period.

In this embodiment, as described above, the frosting condition of the condenser in the last operation cycle can be determined according to the outer disk defrosting temperature value of the last operation cycle, and whether the bottom protection operation time of the last operation cycle is suitable to be extended in the current cycle or not can be determined according to the minimum outer disk defrosting temperature value of the current operation cycle and the outer disk defrosting temperature value of the last operation cycle, and whether the bottom protection operation time needs to be adjusted or not can be determined.

Referring to fig. 3, step S400 may include step S410, step S420 and step S430.

Step S410, determining whether a first difference between the minimum outer plate temperature value of the current operation cycle and the outer plate defrosting temperature value of the previous operation cycle is greater than a first set value.

First, calculating a first difference value between the minimum outer plate temperature value of the current operation period and the outer plate defrosting temperature value of the last operation period, and then judging whether the first difference value is larger than a first set value or not.

The first set value is generally factory set and is approximately 1 to 4 ℃. If the first difference is larger than the first set value, the first difference between the minimum outer plate temperature value and the outer plate defrosting temperature value is relatively large, and if the first difference is smaller than or equal to the first set value, the first difference between the minimum outer plate temperature value and the outer plate defrosting temperature value is relatively small.

In step S420, if the first difference is smaller than the first set value, a first preset time greater than the bottom-protection operation time of the previous operation cycle is set as the bottom-protection operation time when the air conditioner 10 enters the bottom-protection defrosting mode in the current operation cycle.

In this embodiment, if the first difference is smaller than the first set value, it indicates that, in the previous operation cycle, before entering the bottom-protection defrosting mode, the outer tray defrosting temperature value is reduced less, and when the previous cycle enters the bottom-protection defrosting mode, the condenser frosts less, and the bottom-protection operation time can be properly extended in the current cycle, so that the first preset time longer than the bottom-protection operation time in the previous operation cycle is set as the bottom-protection operation time in the current operation cycle.

The first preset time may be a fixed value, or may be set according to the first difference. For example: the smaller the first difference value is, the smaller the temperature value of defrosting of the outer plate is reduced in the last operation period, and the longer first preset time can be set. That is, the first difference is inversely proportional to the first preset time, and the smaller the first difference is, the longer the first preset time is set, and the larger the first difference is, the shorter the first preset time is set.

In step S430, if the first difference is greater than or equal to the first set value, the bottom-keeping running time of the previous running period is set as the bottom-keeping running time when the air conditioner 10 enters the bottom-keeping defrosting mode in the current running period.

When the first difference is larger than or equal to the first set value, the outer plate defrosting temperature value is greatly reduced and the condenser frosting speed is high before entering the bottom protection defrosting mode in the last operation period, the bottom protection operation time of the last operation period is reserved, and the bottom protection operation time of the last operation period is used as the bottom protection operation time of the current operation period.

It should be noted that, if the previous operation cycle is the first operation cycle after the startup, the guaranteed-base operation time of the operation cycle is preset.

Referring to fig. 1, in step S500, a real-time external disk temperature value of the air conditioner 10 in the current operation cycle is obtained.

In this embodiment, the real-time outer disc temperature value refers to an outer disc temperature value obtained after a preset time period, that is, the real-time outer disc temperature value is an outer disc temperature value obtained at different time after the current operation cycle is started for 12 min.

In step S600, the operation time of the air conditioner 10 in the current operation cycle is obtained.

In this embodiment, the operation time of the current operation cycle refers to a time value accumulated by starting to count time after the last operation cycle is finished.

Step S700, controlling the air conditioner 10 to enter a defrosting mode according to the real-time outer disk temperature value and the operation time.

The air conditioner 10 may enter the defrosting mode in which the amount of frost formed on the condenser is large and the operation time is long, and the defrosting mode is set to the normal defrosting mode. The other condition is that the condenser has less frosting and is not enough to enter the normal defrosting mode, in order to ensure that the air conditioner 10 can normally operate, when the frosting amount on the condenser is relatively large but does not reach the frosting amount required by the normal defrosting mode, and the operation time is relatively large but does not reach the frosting amount required by the normal defrosting mode, in order to ensure that the air conditioner 10 can normally operate or can perform defrosting treatment, the entering of the defrosting mode in this condition is the bottom-protecting defrosting 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, calculating a second difference between the real-time outer disc temperature value and the minimum outer disc temperature value.

And calculating a second difference value to judge the change condition of the temperature value of the outer disc, wherein if the second difference value is larger, the change of the temperature value of the outer disc is faster, and if the change of the temperature value of the outer disc is faster, the frosting of the current condenser is faster. If the second difference value is smaller, the change of the temperature value of the outer disc is slower, and the change of the temperature value of the outer disc is faster, so that the frosting of the current condenser is slower. The frosting speed of the condenser in the current operation period can be judged according to the second difference value.

In step S720, it is determined whether the second difference is greater than or equal to a second predetermined value.

The second set value is approximately in the interval of 4-8 ℃, if the second difference value is greater than or equal to the second set value, the frosting speed of the condenser in the current operation period can be considered to be too high, and if the second difference value is less than the second set value, the frosting speed of the condenser in the current operation period can be considered to be slow, and the frosting speed of the outdoor unit in the current operation period can be judged according to the magnitude relation between the second difference value and the second set value.

In step S730, if the second difference is greater than or equal to the second set value, it is determined whether the operation time is greater than or equal to the defrosting set time.

If the second difference is larger than or equal to the second set value, the temperature value of the outer disc of the condenser is considered to be reduced fast, and the frosting speed is probably fast, and the operation time in the current operation period is further judged.

If the air conditioner 10 is controlled to perform the defrosting mode only according to the second difference, the condenser may be frosted too fast, so that the air conditioner 10 may frequently enter the defrosting mode, which affects the comfort of the user, and therefore, it is necessary to set whether the operation time reaches the defrosting setting time to prevent the air conditioner 10 from frequently entering the defrosting mode.

In step S740, if the operation time is greater than or equal to the defrosting setting time, the air conditioner 10 is controlled to enter the normal defrosting mode.

If the operation time is greater than or equal to the defrosting setting time and the second difference is greater than or equal to the second setting value, it indicates that the normal defrosting condition is achieved in the current operation period, the air conditioner 10 enters the normal defrosting mode to start defrosting, and after defrosting is completed, the current operation period ends and enters the next operation period.

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

And step S750, if the second difference is smaller than a second set value or the running time is smaller than defrosting set time, judging whether the real-time outer plate temperature value is smaller than a bottom-protection temperature value.

If the second difference is smaller than the second set value or the running time is smaller than the defrosting set time, the normal defrosting mode is not met currently, the judgment of the bottom-protecting defrosting mode is entered, and whether the real-time outer tray temperature value is smaller than the bottom-protecting temperature value or not is judged.

Generally, the bottom-protection temperature value is relatively small and is approximately between-13 ℃ and-16 ℃, and if the real-time outer disk temperature value is smaller than the bottom-protection temperature value, it indicates that thin frost may be formed on the current condenser, bottom-protection defrosting may be required, so as to ensure normal operation of the air conditioner 10, and avoid that the condenser is blocked due to over-thick frost to cause poor heating effect.

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

Similarly, if the real-time outer tray temperature value is lower than the bottom-maintaining temperature value and immediately enters the bottom-maintaining defrosting mode, the real-time outer tray temperature value itself is relatively low under the condition that the outdoor environment temperature is low, which may cause the air conditioner 10 to frequently enter the bottom-maintaining defrosting mode, thereby affecting the comfort of the user.

The setting of the bottom protection running time can ensure that the back of the bottom protection running time also needs to be run to enter a bottom protection defrosting mode even if the real-time outer disc temperature value is smaller than the bottom protection temperature value, and the comfort level of a user is ensured when the condenser is subjected to defrosting treatment.

In step S770, if the operation time is greater than or equal to the bottom-protection operation time, the air conditioner 10 is controlled to enter the bottom-protection defrosting mode.

In this embodiment, if the operation time is greater than the bottom-protection operation time, the air conditioner 10 is controlled to enter the bottom-protection defrosting mode until defrosting is completed, and the current operation cycle is ended and the next operation cycle is entered.

Step S780, recording an outer tray defrosting temperature value when the air conditioner 10 enters the bottom-preserving defrosting mode.

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

In step S790, if the real-time outer panel temperature value is greater than or equal to the warranty temperature value or the operation time is less than the warranty operation time, the air conditioner 10 continues to be controlled to operate the heating mode.

In this embodiment, if the real-time outer disk temperature value is greater than or equal to the bottom-protection temperature value or the operation time is less than the bottom-protection operation time, it indicates that the current condenser does not need defrosting processing, and the current heating mode continues to be operated.

The defrosting modes of the normal defrosting mode and the bottom-protection defrosting mode can be the same or different.

Steps S500 to S790 all refer to the current operation cycle. If not explicitly stated, the minimum outer disk temperature value, the bottoming operation time, and the like can be regarded as the minimum outer disk temperature value and the bottoming operation time of the current operation cycle.

The working principle of the defrosting control method provided by the embodiment is as follows: in this embodiment, when the air conditioner 10 enters the current operation cycle, the outer panel defrosting temperature value of the last operation cycle entering the bottom protection defrosting mode is obtained, the bottom protection defrosting time of the current operation cycle is adjusted according to the minimum outer panel temperature value of the preset time period in the current operation cycle, whether the air conditioner enters the normal defrosting mode is judged according to the minimum outer panel temperature value, the operation time and the real-time outer panel temperature value, and whether the air conditioner enters the bottom protection defrosting mode is judged according to the real-time outer panel temperature value and the operation time after the air conditioner cannot enter the normal defrosting mode.

In summary, in the defrosting control method provided in this embodiment, when the air conditioner 10 enters the current operation cycle, the outer tray defrosting temperature value at which the previous operation cycle enters the bottom-protection defrosting mode is obtained, and the bottom-protection defrosting time of the current operation cycle is adjusted according to the minimum outer tray temperature value in the preset time period in the current operation cycle, so that the bottom-protection defrosting time of the current operation cycle can be adjusted, the defrosting times are reduced, and the comfort level of the user is improved.

Referring to fig. 5, an embodiment of the present invention further provides a defrosting control device 20, where the defrosting control device 20 includes:

and a starting module 21 for controlling the air conditioner 10 to operate in a heating mode.

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

The minimum obtaining module 22 is configured to obtain a minimum outer disk temperature value of the air conditioner 10 in 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 executed by the minimum obtaining module 22.

The first obtaining module 23 is configured to obtain an outer tray defrosting temperature value when the air conditioner 10 enters the bottom-protection defrosting mode in the last operation 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.

And the operation module 24 is configured to adjust the bottom-protection operation time when the air conditioner 10 in the current operation period enters the bottom-protection defrosting mode according to the minimum outer panel temperature value in the current operation period and the outer panel defrosting temperature value in 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.

And a real-time obtaining mode 25, configured to obtain a real-time external 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 executed by the real-time obtaining module.

And a time acquiring module 26 for acquiring the operation time of the air conditioner 10 in the current operation period.

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

And the defrosting module 27 is used for controlling the air conditioner 10 to enter a 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 the embodiment of the present invention, the controller 11 may be an integrated circuit chip having signal processing capability. The controller 11 may be a general-purpose processor, and may include a Central Processing Unit (CPU), a single chip Microcomputer (MCU), a Micro Controller Unit (MCU), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an embedded ARM, and other chips, where the controller 11 may implement or execute the methods, steps, and Logic blocks disclosed in the embodiments of the present invention.

In one possible implementation, the air conditioner 10 may further include a memory for storing program instructions executable by the controller 11, for example, the defrosting control device 20 provided by the embodiment of the present application may include at least one of software and firmware stored in the memory. The Memory may be a stand-alone external Memory including, but not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Read-Only Memory (EPROM), electrically Erasable Read-Only Memory (EEPROM). The memory may also be integrated with the controller 11, for example, the memory may be integrated with the controller 11 in the same chip.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A defrosting control method characterized by comprising:

controlling the air conditioner (10) to operate in a heating mode;

acquiring a minimum outer disc temperature value of the air conditioner (10) in a preset time period of a current operation cycle;

acquiring an outer plate defrosting temperature value when the air conditioner (10) enters a bottom-preserving defrosting mode in the last operating period;

adjusting the bottom-preserving operation time of the air conditioner (10) entering the bottom-preserving defrosting mode in the current operation period according to the minimum outer disk temperature value in the current operation period and the outer disk defrosting temperature value in the previous operation period;

the defrosting mode comprises a bottom-protecting defrosting mode and a normal defrosting mode;

the defrosting control method further comprises the following steps:

acquiring a real-time outer disc temperature value of the air conditioner (10) in a current operation period;

acquiring the running time of the air conditioner (10) in the current running period;

controlling the air conditioner (10) to enter a defrosting mode according to the real-time outer disc temperature value and the running time;

the defrosting mode comprises a bottom-protecting defrosting mode, and the step of controlling the air conditioner (10) to enter the bottom-protecting defrosting mode according to the real-time outer plate temperature value and the running time comprises the following steps:

if the real-time outer disc temperature value is smaller than the bottom-guaranteed temperature value, judging whether the running time of the air conditioner (10) is larger than the bottom-guaranteed running time;

if the running time is larger than the bottom-protection running time, controlling the air conditioner (10) to enter a bottom-protection defrosting mode;

the defrosting control method further comprises the following steps:

and if the running time is greater than or equal to the defrosting set time, controlling the air conditioner (10) to enter a normal defrosting mode.

2. The defrosting control method according to claim 1, wherein the step of adjusting the bottoming operation time of the air conditioner (10) entering the bottoming defrosting mode in the current operation cycle according to the minimum outer panel defrosting temperature value in the current operation cycle and the outer panel defrosting temperature value in the previous operation cycle comprises:

if the first difference is smaller than the first set value, setting a first preset time which is larger than the bottom-protection running time of the last running period as the bottom-protection running time of the air conditioner (10) entering the bottom-protection defrosting mode in the current running period.

3. The defrosting control method according to claim 2, further comprising:

and if the first difference is larger than or equal to the first set value, setting the bottom-keeping running time of the previous running period as the bottom-keeping running time of the air conditioner (10) entering the bottom-keeping defrosting mode in the current running period.

4. The defrosting control method according to claim 1, wherein the step of controlling the air conditioner (10) to enter a bottom-preserving defrosting mode according to the real-time outside temperature value and the running time further comprises:

and if the real-time outer disk temperature value is greater than or equal to the bottom-guaranteed temperature value or the running time is less than or equal to the bottom-guaranteed running time, continuing to control the air conditioner (10) to run the heating mode.

5. The defrosting control method according to claim 1, characterized in that after the step of controlling the air conditioner (10) to enter the bottoming defrosting mode, the defrosting control method further comprises:

and recording the defrosting temperature value of the outer plate when the air conditioner (10) enters the bottom-protecting defrosting mode.

6. The defrosting control method according to claim 1, further comprising:

and if the second difference value is smaller than the second set value or the running time is smaller than the defrosting set time, executing a step of judging whether the real-time outer plate temperature value is smaller than a bottom protection temperature value.

7. A defrosting control apparatus characterized by comprising:

the starting module (21) is used for controlling the air conditioner (10) to operate a heating mode;

the minimum acquisition module (22) is used for acquiring the minimum outer disk temperature value of the air conditioner (10) in the preset time period of the current operation cycle;

the first acquisition module (23) is used for acquiring an outer plate defrosting temperature value when the air conditioner (10) enters a bottom-preserving defrosting mode in the last operating cycle;

the operation module (24) is used for adjusting the bottom-protecting operation time of the air conditioner (10) entering the bottom-protecting defrosting mode in the current operation period according to the minimum outer plate temperature value in the current operation period and the outer plate defrosting temperature value in the previous operation period;

the defrosting control means (20) further includes:

a real-time acquisition mode (25) for acquiring a real-time outer disk temperature value of the air conditioner (10) in a current operation period;

a time acquisition module (26) for acquiring the operation time of the air conditioner (10) in the current operation period;

the defrosting module (27) is used for controlling the air conditioner (10) to enter a defrosting mode according to the real-time outer disc temperature value and the running time;

the defrosting module (27) is used for judging whether the real-time outer disc temperature value is smaller than a bottom protection temperature value or not; if the real-time outer disc temperature value is smaller than the bottom-guaranteed temperature value, judging whether the running time of the air conditioner (10) is larger than the bottom-guaranteed running time; if the running time is larger than the bottom-protection running time, controlling the air conditioner (10) to enter a bottom-protection defrosting mode;

the defrosting module (27) is used for calculating a second difference value between the real-time outer disc temperature value and the minimum outer disc temperature value; judging whether the second difference value is larger than or equal to a second set value or not; if the second difference is larger than or equal to a second set value, judging whether the running time is larger than or equal to defrosting set time; and if the running time is greater than or equal to the defrosting set time, controlling the air conditioner (10) to enter a normal defrosting 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.