CN109974203B

CN109974203B - Defrosting method of air conditioner and air conditioner

Info

Publication number: CN109974203B
Application number: CN201910169051.XA
Authority: CN
Inventors: 左计学; 陈卫星; 李虎; 宋振兴
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2019-03-06
Filing date: 2019-03-06
Publication date: 2021-03-23
Anticipated expiration: 2039-03-06
Also published as: CN109974203A

Abstract

The embodiment of the invention discloses a defrosting method of an air conditioner and the air conditioner, relates to the technical field of air conditioners, and solves the problems that the indoor temperature is reduced and the user experience is poor due to the fact that the air conditioner defrosts in winter. The specific scheme is as follows: after the heating time reaches a set threshold, acquiring a first liquid pipe temperature of the first heat exchanger and a second liquid pipe temperature of the second heat exchanger; and if the temperature of the first liquid pipe is less than the first defrosting temperature threshold value, and the temperature of the second liquid pipe is greater than or equal to the second defrosting temperature threshold value, controlling the first heat exchanger to defrost, controlling the first fan to stop running, controlling the second heat exchanger to keep heating, and controlling the second fan to run. The embodiment of the invention is used in the defrosting process of the air conditioner.

Description

Defrosting method of air conditioner and air conditioner

Technical Field

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

Background

When the air conditioner heats at low temperature in winter, the surface temperature of the heat exchanger of the outdoor unit is low, and when the temperature of the heat exchanger is lower than the outdoor air temperature, water vapor in the outdoor air is condensed on the surface of the heat exchanger, so that the refrigerant in the heat exchanger absorbs heat. However, if the outdoor air temperature is below zero degrees centigrade, water vapor in the air condenses as frost on the heat exchanger surfaces. As the heating process continues, the frost layer on the surface of the heat exchanger will be thickened continuously, so that the heating effect of the air conditioner is deteriorated. Therefore, when the frost layer is accumulated to a certain thickness, the air conditioner needs to be defrosted.

Among the prior art, to realizing cold and hot alternating air conditioner with the switching-over of cross valve, the defrosting process is exactly the refrigeration process in fact, and the heat exchanger of off-premises station can draw sufficient heat from the indoor side and change frost, can lead to indoor temperature to descend like this, influences user experience.

Disclosure of Invention

The invention provides a defrosting method of an air conditioner and the air conditioner, and solves the problems that the indoor temperature is reduced and the user experience is poor due to the fact that the air conditioner performs defrosting in winter.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the present invention provides a defrosting method for an air conditioner, the method being applicable to an air conditioner, an outdoor unit of the air conditioner including: the heat exchanger includes a first heat exchanger, a second heat exchanger, a first fan corresponding to the first heat exchanger, and a second fan corresponding to the second heat exchanger. The method can comprise the following steps: after the heating time reaches a set threshold, acquiring a first liquid pipe temperature of the first heat exchanger and a second liquid pipe temperature of the second heat exchanger; and if the temperature of the first liquid pipe is less than the first defrosting temperature threshold value, and the temperature of the second liquid pipe is greater than or equal to the second defrosting temperature threshold value, controlling the first heat exchanger to defrost, controlling the first fan to stop running, controlling the second heat exchanger to keep heating, and controlling the second fan to run.

With reference to the first aspect, in a possible implementation manner, the method may further include: acquiring the return air temperature of an air inlet of an indoor unit of an air conditioner; if the return air temperature is greater than or equal to the difference between the heating set temperature and the compensation value, controlling a fan of the indoor unit to keep running; and if the return air temperature is less than the difference value, judging whether the indoor unit contains electric heating. When the indoor unit comprises electric heating, the electric heating is controlled to heat; when the indoor unit does not contain electric heating, the rotating speed of a fan of the indoor unit is controlled to be reduced; when the duration that the return air temperature is smaller than the difference value is determined to be larger than or equal to the time threshold, outputting prompt information, wherein the prompt information is used for prompting a user whether to reduce the heating set temperature; when the refusing operation of the user is received, the second heat exchanger is controlled to defrost, and the second fan is controlled to stop running; and when receiving the confirmation operation of the user, controlling to reduce the heating set temperature.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the method may further include: after defrosting is carried out on the first heat exchanger, the air pipe pressure of the first heat exchanger is obtained; if the air pipe pressure is smaller than the set pressure value and the duration time reaches a first preset time, controlling the first heat exchanger to heat and controlling the first fan to operate; and if the air pipe pressure is greater than or equal to the set pressure value, the current liquid pipe temperature of the first heat exchanger is less than the first defrosting temperature threshold value, and the duration time of the current liquid pipe temperature of the first heat exchanger less than the first defrosting temperature threshold value reaches a second preset time, controlling the first heat exchanger to heat, and controlling the first fan to run.

With reference to the first aspect and the foregoing possible implementation manners, in another possible implementation manner, the outdoor unit of an air conditioner may further include: and the hydrophobic plate is arranged between the first heat exchanger and the second heat exchanger when the first heat exchanger and the second heat exchanger are vertically combined and placed, and is used for preventing the condensed water after the first heat exchanger is defrosted from falling onto the second heat exchanger for heating.

In a second aspect, the present invention provides an air conditioner, wherein an outdoor unit of the air conditioner may include: the air conditioner may include a first heat exchanger, a second heat exchanger, a first fan corresponding to the first heat exchanger, and a second fan corresponding to the second heat exchanger: an acquisition unit and a control unit. The acquisition unit is used for acquiring a first liquid pipe temperature of the first heat exchanger and a second liquid pipe temperature of the second heat exchanger after the heating time reaches a set threshold; and the control unit is used for controlling the first heat exchanger to defrost, controlling the first fan to stop running, controlling the second heat exchanger to keep heating and controlling the second fan to run if the temperature of the first liquid pipe is less than the first defrosting temperature threshold and the temperature of the second liquid pipe is greater than or equal to the second defrosting temperature threshold.

With reference to the second aspect, in one possible implementation manner, the air conditioner may further include: a judging unit and an output unit. The acquisition unit is also used for acquiring the return air temperature of an air inlet of an indoor unit of the air conditioner; the control unit is also used for controlling a fan of the indoor unit to keep running if the return air temperature is greater than or equal to the difference value between the heating set temperature and the compensation value; the judging unit is used for judging whether the indoor unit contains electric heating or not if the return air temperature is less than the difference value; the control unit is also used for controlling the electric heating to heat when the indoor unit comprises the electric heating; when the indoor unit does not contain electric heating, controlling and reducing the rotating speed of a fan of the indoor unit; the output unit is used for outputting prompt information when the duration time that the return air temperature is less than the difference value is determined to be greater than or equal to a time threshold value, and the prompt information is used for prompting a user whether to reduce the heating set temperature; the control unit is also used for controlling the second heat exchanger to defrost and controlling the second fan to stop running when the rejection operation of the user is received; and controlling to reduce the heating set temperature when the confirmation operation of the user is received.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the obtaining unit is further configured to obtain an air pipe pressure of the first heat exchanger after the first heat exchanger performs defrosting; the control unit is also used for controlling the first heat exchanger to heat and controlling the first fan to run if the air pipe pressure is less than the set pressure value and the duration time reaches a first preset time; and if the air pipe pressure is greater than or equal to the set pressure value, the current liquid pipe temperature of the first heat exchanger is less than the first defrosting temperature threshold value, and the duration time of the current liquid pipe temperature of the first heat exchanger less than the first defrosting temperature threshold value reaches a second preset time, controlling the first heat exchanger to heat, and controlling the first fan to run.

With reference to the second aspect and the foregoing possible implementation manners, in another possible implementation manner, the outdoor unit of an air conditioner may further include: and the hydrophobic plate is arranged between the first heat exchanger and the second heat exchanger when the first heat exchanger and the second heat exchanger are vertically combined and placed, and is used for preventing the condensed water after the first heat exchanger is defrosted from falling onto the second heat exchanger for heating.

Specific implementations may refer to the behavior functions of the air conditioner in the defrosting method of the air conditioner provided in the first aspect or the possible implementations of the first aspect.

In a third aspect, an air conditioner is provided, including: at least one processor, a memory, a communication interface, and a communication bus. The processor is connected with the memory and the communication interface through a communication bus, the memory is used for storing computer execution instructions, and when the air conditioner runs, the processor executes the computer execution instructions stored in the memory, so that the air conditioner executes the defrosting method of the air conditioner as the first aspect or any one of the possible implementation manners of the first aspect.

In a fourth aspect, there is provided a computer storage medium having stored thereon computer-executable instructions that, when executed on an air conditioner, cause the air conditioner to perform a defrosting method of the air conditioner as in the first aspect or any one of the possible implementations of the first aspect.

In the defrosting method of the air conditioner, provided by the invention, in the heating mode, if the temperature of the liquid pipe of the first heat exchanger is less than the first defrosting temperature threshold value and the temperature of the liquid pipe of the second heat exchanger is greater than or equal to the second defrosting temperature threshold value, the air conditioner enters a defrosting and heating synchronous mode, namely the first heat exchanger is controlled to defrost, the first fan is controlled to stop running, the second heat exchanger is controlled to keep heating, and the second fan is controlled to keep running. Thus, if only the temperature of the first liquid pipe is less than the first defrosting temperature threshold value, the frost layer on the first heat exchanger is thicker, at the moment, the first heat exchanger with the thicker frost layer is preferentially controlled to defrost, the first fan is controlled to stop running, the frosting amount of the air conditioner is reduced on the whole, meanwhile, the second heat exchanger is controlled to keep heating, and the second fan is controlled to keep running, so that the reduction of the indoor temperature is reduced, and the influence of temperature reduction on a user in the defrosting process is reduced.

Drawings

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

FIG. 2 is a schematic diagram of an appearance of a hydrophobic plate according to an embodiment of the present invention;

FIG. 3 is a schematic view of an installation of a hydrophobic plate according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a defrosting method of an air conditioner according to an embodiment of the present invention;

FIG. 5 is a flow chart illustrating a defrosting method for an air conditioner according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of another air conditioner according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of another air conditioner according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of another air conditioner according to an embodiment of the present invention;

fig. 9 is a schematic diagram of another air conditioner according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to solve the problems that the indoor temperature is reduced and the user experience is poor due to the fact that the air conditioner performs defrosting in winter, the embodiment of the invention provides a defrosting method of the air conditioner. As shown in fig. 1, the air conditioner may include: indoor set and outdoor unit, wherein, the outdoor unit can include: the system comprises a liquid side stop valve 1, a gas side stop valve 2, a compressor 3, a four-way reversing valve 4, a drain plate 5, a first fan 6-1, a second fan 6-2, a first heat exchanger 7-1, a second heat exchanger 7-2, a first gas collecting pipe 8-1, a second gas collecting pipe 8-2, a first liquid collecting pipe 9-1, a second liquid collecting pipe 9-2, a first electronic expansion valve 10-1, a second electronic expansion valve 10-2, a first electromagnetic valve 11-1, a second electromagnetic valve 11-2, a third electromagnetic valve 11-3 and a fourth electromagnetic valve 11-4.

In the embodiment of the present invention, the placement manner of the first heat exchanger 7-1 and the second heat exchanger 7-2 is not particularly limited. In fig. 1, the first heat exchanger 7-1 and the second heat exchanger 7-2 are disposed in a vertically combined manner, and in this case, a hydrophobic plate 5 may be disposed between the two heat exchangers to prevent the condensed water produced by defrosting the first heat exchanger 7-1 from falling on the second heat exchanger 7-2 for heating and affecting the heating effect of the second heat exchanger 7-2. For this purpose, the hydrophobic plate 5 may adopt a hydrophilic coating and a corrosion-resistant design, and both sides of the hydrophobic plate 5 are designed to be arc-shaped, as shown in fig. 2, which is an appearance diagram of the hydrophobic plate 5. As shown in fig. 3, the installation of the hydrophobic plate 5 is schematically illustrated.

Referring to fig. 1, as shown in fig. 4, a defrosting method of an air conditioner may include:

201. and after the heating time reaches a set threshold value, acquiring the first liquid pipe temperature of the first heat exchanger and the second liquid pipe temperature of the second heat exchanger.

After the air conditioner enters a heating mode, timing can be started from zero, and after the heating time reaches a set threshold value, the collected first liquid pipe temperature of the first heat exchanger and the collected second liquid pipe temperature of the second heat exchanger can be obtained.

Referring to fig. 1, the control of the heating mode of the air conditioner is shown in table 1, in which the first solenoid valve and the second solenoid valve are normally fully closed, and when the suction pressure of the compressor is less than the lower limit value, the first solenoid valve and the second solenoid valve are fully opened, so that the discharge air (12) of the compressor passes through the bypasses (13) and (18) to the suction side of the compressor.

TABLE 1

Serial number	Name (R)	Operating state
			1	Liquid side stop valve	Full open
2	Gas side stop valve	Full open
			3	Compressor	Controlling operation
4	Four-way reversing valve	Power-off
			6-1	First fan	Controlling operation
6-2	Second fan	Controlling operation
			10-1	First electronic expansion valve	Full closing
10-2	Second electronic expansion valve	Full closing
			11-1	First electromagnetic valve	Controlling operation
11-2	Second electromagnetic valve	Controlling operation
			11-3	Third solenoid valve	Full open
11-4	Fourth solenoid valve	Full open

At this time, both the first heat exchanger and the second heat exchanger perform heating, and the circulation flow is as follows: the refrigerant liquid pipe interface (1) → (2) is divided into two paths from the beginning of the interface (2), wherein the one path is as follows: (2) → 17 → 16 → 15 → 14 → 19 → 8, and the other path is: (2) → (3) → (4) → (5) → (6) → (7) → (8), the two paths merging: (8) → (9) → (10) → (11) → (12) → (20) → refrigerant air pipe interface (21).

202. And if the temperature of the first liquid pipe is less than the first defrosting temperature threshold value, and the temperature of the second liquid pipe is greater than or equal to the second defrosting temperature threshold value, controlling the first heat exchanger to defrost, controlling the first fan to stop running, controlling the second heat exchanger to keep heating, and controlling the second fan to run.

After the air conditioner acquires the first liquid pipe temperature and the second liquid pipe temperature, the two liquid pipe temperatures can be judged. If the first liquid pipe temperature is less than the first defrosting temperature threshold value, and the second liquid pipe temperature is greater than or equal to the second defrosting temperature threshold value, the air conditioner can enter a defrosting and heating synchronous mode, namely the air conditioner can control the first heat exchanger to defrost, and simultaneously control the first fan to stop running so as to clear away frost layer condensed on the first heat exchanger, control the second heat exchanger to keep heating, control the second fan to keep running, and control the compressor to run at high frequency. In a specific implementation, in conjunction with fig. 1, the first heat exchanger is defrosted and the second heat exchanger is controlled to produce heat as shown in table 2:

TABLE 2

Serial number	Name (R)	Operating state
			1	Liquid side stop valve	Full open
2	Gas side stop valve	Full open
			3	Compressor	Controlling operation
4	Four-way reversing valve	Power-off
			6-1	First fan	Stop running
6-2	Second fan	Controlling operation
			10-1	First electronic expansion valve	Full open
10-2	Second electronic expansion valve	Controlling operation
			11-1	First electromagnetic valve	Full closing
11-2	Second electromagnetic valve	Full open
			11-3	Third solenoid valve	Full open
11-4	Fourth solenoid valve	Full closing

At this time, the circulation flow is: the method comprises the following steps of dividing a refrigerant liquid pipe interface (1) → (2) → (3) → (4) → (5) → (6) → (7) → (8) → (9) → (10) → (11) → (12) into two paths from (12), wherein the one path is as follows: (12) → 20 → refrigerant air pipe interface 21, and the other path is: (12) → 13 → 14 → 15 → 16 → 17 → 3.

If the temperature of the first liquid pipe is greater than or equal to the first defrosting temperature threshold value, and the temperature of the second liquid pipe is less than the second defrosting temperature threshold value, the air conditioner enters a defrosting and heating synchronous mode, namely the air conditioner can control the first heat exchanger to keep heating, control the first fan to keep running, control the second heat exchanger to defrost, control the second fan to stop running, so that a frost layer condensed on the second heat exchanger is removed, and control the compressor to run at high frequency. In a specific implementation, in conjunction with fig. 1, the first heat exchanger is heating and the second heat exchanger is defrosting as shown in table 3:

TABLE 3

At this time, the circulation flow is: the method comprises the following steps of dividing a refrigerant liquid pipe interface (1) → (2) → (17) → (16) → (15) → (14) → (19) → (8) → (9) → (10) → (11) → (12) into two paths from (12), wherein the one path is as follows: (12) → 20 → refrigerant air pipe interface 21, and the other path is: (12) → 18 → 6 → 5 → 4 → 3 → 17.

If the temperature of the first liquid pipe is smaller than the first defrosting temperature threshold value and the temperature of the second liquid pipe is smaller than the second defrosting temperature threshold value, the air conditioner enters a full defrosting mode, namely the air conditioner can control the first heat exchanger and the second heat exchanger to defrost, control the first fan and the second fan to stop running and control the compressor to run at a high frequency. In a specific implementation, in conjunction with fig. 1, the control of the full defrost mode is shown in table 4:

TABLE 4

At this time, the circulation flow is: refrigerant air pipe interface (21) → (20) → (12) → (9) → (10) → (11) → (8), starting from (8), branching into two paths, wherein one path is: (8) → 19 → 14 → 15 → 16 → 17, and the other path is: (8) → 7 → 6 → 5 → 4 → 3, 17 and 3 combine → (2) → the coolant liquid pipe interface (1).

If the first liquid pipe temperature is larger than or equal to the first defrosting temperature threshold value, and the second liquid pipe temperature is larger than or equal to the second defrosting temperature threshold value, the air conditioner continuously keeps the heating mode, obtains the temperatures of the two liquid pipes again after running for a period of time for judgment, and executes corresponding operation according to the judgment result.

It should be noted that, in the defrosting and heating synchronous mode, the air conditioner may obtain the liquid tube temperatures of the two heat exchangers in real time, and if the liquid tube temperatures of the two heat exchangers are both less than the corresponding defrosting temperature threshold, the air conditioner switches from the defrosting and heating synchronous mode to the full defrosting mode.

Further, in the embodiment of the present invention, the air conditioner enters a defrosting and heating synchronous mode, for example, in the case that the first heat exchanger is defrosted and the second heat exchanger is heating, the air conditioner can obtain the air pipe pressure of the first heat exchanger in real time after defrosting. If the air pipe pressure is smaller than the set pressure value, and the duration time that the air pipe pressure is smaller than the set pressure value reaches a first preset time, the air conditioner can enter a full heating mode, namely, the first heat exchanger is controlled to heat, and the first fan is controlled to operate. If the air pipe pressure is greater than or equal to the set pressure value, the air conditioner can acquire the liquid pipe temperature of the current first heat exchanger, and if the current liquid pipe temperature is greater than or equal to the first defrosting temperature threshold value, the defrosting is indicated to be finished, and the air conditioner can enter a full heating mode. If the current liquid pipe temperature is smaller than the first defrosting temperature threshold value and the duration time that the liquid pipe temperature is smaller than the first defrosting temperature threshold value reaches second preset time, the air conditioner can forcibly quit defrosting and enter a full heating mode, namely, the first heat exchanger is controlled to heat and the first fan is controlled to operate.

It should be noted that, in the defrosting and heating synchronous mode, since the first heat exchanger is heating, the second heat exchanger is defrosting, similarly to the case of the first heat exchanger being defrosting, and the second heat exchanger is heating, the above-mentioned conditions for defrosting exiting in the case of heating the first heat exchanger and defrosting the second heat exchanger can be referred to as the conditions for defrosting the first heat exchanger and defrosting the second heat exchanger.

Further, in the embodiment of the present invention, after the air conditioner enters the full defrosting mode, the air pipe pressures of the two heat exchangers can be respectively obtained after defrosting. If at least one air pipe pressure is smaller than the corresponding set pressure value and the duration time reaches the first preset time, the air conditioner can quit defrosting and enter a full heating mode, namely the two heat exchangers are controlled to heat and the two fans are controlled to run. If two trachea pressures all are greater than or equal to corresponding set pressure value, then the air conditioner can acquire two heat exchanger's current liquid pipe temperature, if two liquid pipe temperatures all are less than the defrosting temperature threshold value that corresponds, and the duration reaches the second preset time, then the air conditioner can force to withdraw from the defrosting, gets into the full mode of heating, controls two heat exchangers promptly and heats to control two fan operations. If the temperatures of the two liquid pipes are both larger than or equal to the corresponding defrosting temperature threshold value, the defrosting is finished, and the air conditioner can enter a full heating mode. If one of the liquid tube temperatures is less than the corresponding defrost temperature threshold and the other liquid tube temperature is greater than or equal to the corresponding defrost temperature threshold, the air conditioner enters a defrost and heat synchronization mode.

Further, in the embodiment of the present invention, the air conditioner enters a defrosting and heating synchronous mode, and after the step 202, the indoor unit may be further controlled, as shown in fig. 5, the defrosting method of the air conditioner may further include:

203. and acquiring the return air temperature of an air inlet of an indoor unit of the air conditioner.

204. And if the return air temperature is greater than or equal to the difference between the heating set temperature and the compensation value, controlling the fan of the indoor unit to keep running.

After the air conditioner obtains the return air temperature, if the return air temperature is determined to be greater than or equal to the difference value between the heating set temperature and the compensation value, the fact that the air conditioner can still reach the indoor heating set temperature during defrosting is indicated, and at the moment, the air conditioner can control a fan of an indoor unit to keep the rotating speed unchanged and keep the heating set temperature unchanged.

205. And if the return air temperature is less than the difference value, judging whether the indoor unit contains electric heating.

If the return air temperature is less than the difference value, the condition that the air conditioner cannot reach the indoor set temperature in the defrosting and heating synchronous mode is indicated, and the air conditioner needs to heat indoors at the moment, so that the indoor temperature is increased. Specifically, the air conditioner may determine whether the indoor unit includes electric heating, if so, the following step 206 may be performed, and if not, the air conditioner may perform the following step 207.

206. When the indoor unit comprises electric heating, the electric heating is controlled to heat.

207. And when the indoor unit does not contain electric heating, controlling to reduce the rotating speed of a fan of the indoor unit.

208. And when the duration that the return air temperature is less than the difference value is determined to be greater than or equal to the time threshold, outputting prompt information.

The air conditioner can acquire the return air temperature in real time, and judges whether the duration time that the return air temperature is less than the difference value is greater than or equal to a time threshold value or not after controlling electric heating or running at a reduced rotating speed of a fan of the indoor unit. If so, the air conditioner may output a prompt for prompting the user whether to lower the heating set temperature, that is, the air conditioner cannot maintain the indoor set temperature in the defrosting condition at present, and the user needs to be asked whether to wish to lower the heating set temperature. If not, the air conditioner can keep the fan speed and the heating set temperature of the indoor unit to be operated unchanged.

209. And when the rejection operation of the user is received, controlling the second heat exchanger to defrost and controlling the second fan to stop running.

After the air conditioner outputs the prompt message, if the rejection operation of the user is received, the air conditioner can be switched to the full-defrosting mode from the defrosting and heating synchronous mode, and if the first heat exchanger is defrosted and the second heat exchanger is heated, the second heat exchanger is controlled to defrost and the second fan is controlled to stop running.

210. And when receiving the confirmation operation of the user, controlling to reduce the heating set temperature.

If the confirmation operation of the user is received, the air conditioner can continuously run the defrosting and heating synchronous mode, and the heating set temperature is reduced.

The scheme provided by the embodiment of the invention is mainly introduced from the perspective of an air conditioner. It is understood that the air conditioner includes hardware structures and/or software modules corresponding to the respective functions in order to implement the above-described functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The embodiment of the present invention may perform the division of the functional modules for the air conditioner according to the method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In the case of dividing each function module according to each function, fig. 6 shows another possible composition diagram of the air conditioner related to the above embodiment, as shown in fig. 6, the air conditioner may include: an acquisition unit 31 and a control unit 32.

The obtaining unit 31 is configured to support the air conditioner to perform step 201 in the defrosting method of the air conditioner shown in fig. 4, and perform step 203 in the defrosting method of the air conditioner shown in fig. 5.

The control unit 32 is configured to support the air conditioner to perform step 202 in the defrosting method of the air conditioner shown in fig. 4, and perform step 204, step 206, step 207, step 209, and step 210 in the defrosting method of the air conditioner shown in fig. 5.

Further, in an embodiment of the present invention, as shown in fig. 7, the air conditioner may include: a judging unit 33 and an output unit 34.

And a determination unit 33 for supporting the air conditioner to perform step 205 in the defrosting method of the air conditioner shown in fig. 5.

And an output unit 34 for supporting the air conditioner to perform step 208 of the defrosting method of the air conditioner shown in fig. 5.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

The air conditioner provided by the embodiment of the invention is used for executing the defrosting method of the air conditioner, so that the same effect as the defrosting method of the air conditioner can be achieved.

In the case of an integrated unit, fig. 8 shows another possible schematic composition of the air conditioner according to the above-described embodiment. As shown in fig. 8, the air conditioner includes: a processing module 41, a communication module 42 and a storage module 43.

The processing module 41 is used for controlling and managing the actions of the air conditioner, for example, the processing module 41 is used for supporting the air conditioner to execute step 201, step 202 in fig. 4, step 203, step 204, step 205, step 206, step 207, step 208, step 209, step 210 in fig. 5, and/or other processes for the technology described herein. The communication module 42 is used to support the communication between the air conditioner and other network entities. And a storage module 43 for storing program codes and data of the air conditioner.

The processing module 41 may be a processor. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A Processor may also be a combination of computing functions, including, for example, one or more microprocessors, a Digital Signal Processor (DSP) and microprocessor combination, or the like. The communication module 42 may be a communication interface. The storage module 43 may be a memory.

When the processing module 41 is a processor, the communication module 42 is a communication interface, and the storage module 43 is a memory, the air conditioner according to the embodiment of the present invention may be the air conditioner shown in fig. 9.

Fig. 9 is a schematic composition diagram of an air conditioner according to an embodiment of the present invention, and as shown in fig. 9, the air conditioner may include: at least one processor 51, a memory 52, a communication interface 53 and a communication bus 54.

The following describes each component of the air conditioner in detail with reference to fig. 9:

the processor 51 is a control center of the air conditioner, and may be a single processor or a collective term for a plurality of processing elements. For example, the processor 51 is a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention, such as: one or more DSPs, or one or more Field Programmable Gate Arrays (FPGAs).

In particular implementations, processor 51 may include one or more CPUs such as CPU0 and CPU1 shown in fig. 9 as one example. Also, as an example, the air conditioner may include a plurality of processors, such as the processor 51 and the processor 55 shown in fig. 9. Each of these processors may be a Single-core processor (Single-CPU) or a Multi-core processor (Multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The Memory 52 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 52 may be self-contained and coupled to the processor 51 via a communication bus 54. The memory 52 may also be integrated with the processor 51.

In a particular implementation, the memory 52 is used for storing data and software programs for implementing the present invention. The processor 51 may perform various functions of the air conditioner by running or executing software programs stored in the memory 52 and calling data stored in the memory 52.

The communication interface 53 is a device such as any transceiver for communicating with other devices or communication Networks, such as a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), and the like. The communication interface 53 may include a receiving unit implementing a receiving function and a transmitting unit implementing a transmitting function.

The communication bus 54 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.

Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention may be essentially or partially contributed to by the prior art, or all or part of the technical solution may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions within the technical scope of the present invention are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The defrosting method of the air conditioner is characterized by being applied to the air conditioner, and an outdoor unit of the air conditioner comprises the following steps: a first heat exchanger, a second heat exchanger, a first fan corresponding to the first heat exchanger, and a second fan corresponding to the second heat exchanger, the method comprising:

after the heating time reaches a set threshold, acquiring a first liquid pipe temperature of the first heat exchanger and a second liquid pipe temperature of the second heat exchanger;

if the first liquid pipe temperature is lower than a first defrosting temperature threshold value, and the second liquid pipe temperature is higher than or equal to a second defrosting temperature threshold value, controlling the first heat exchanger to defrost, controlling the first fan to stop running, controlling the second heat exchanger to keep heating, and controlling the second fan to run;

the method further comprises the following steps:

acquiring the return air temperature of an air inlet of an indoor unit of the air conditioner;

if the return air temperature is greater than or equal to the difference value between the heating set temperature and the compensation value, controlling a fan of the indoor unit to keep running;

if the return air temperature is less than the difference value, judging whether the indoor unit contains electric heating;

when the indoor unit comprises the electric heating, controlling the electric heating to heat;

when the indoor unit does not contain the electric heating, the rotating speed of a fan of the indoor unit is controlled to be reduced;

when the duration that the return air temperature is smaller than the difference value is determined to be larger than or equal to a time threshold, outputting prompt information, wherein the prompt information is used for prompting a user whether to reduce the heating set temperature;

when the rejection operation of a user is received, controlling the second heat exchanger to defrost, and controlling the second fan to stop running;

and when receiving the confirmation operation of the user, controlling to reduce the heating set temperature.

2. The defrosting method of an air conditioner according to claim 1, further comprising:

after defrosting is carried out on the first heat exchanger, the air pipe pressure of the first heat exchanger is obtained;

if the air pipe pressure is smaller than a set pressure value and the duration time reaches a first preset time, controlling the first heat exchanger to heat and controlling the first fan to operate;

if the air pipe pressure is larger than or equal to the set pressure value, the temperature of the liquid pipe of the first heat exchanger is smaller than the first defrosting temperature threshold value at present, and the duration time of the liquid pipe of the first heat exchanger smaller than the first defrosting temperature threshold value reaches second preset time, the first heat exchanger is controlled to heat, and the first fan is controlled to run.

3. The defrosting method of an air conditioner according to claim 1, wherein the outdoor unit of the air conditioner further comprises: and the hydrophobic plate is arranged between the first heat exchanger and the second heat exchanger when the first heat exchanger and the second heat exchanger are vertically combined and placed, and is used for preventing the condensed water after the first heat exchanger is defrosted from falling onto the second heat exchanger for heating.

4. An air conditioner, characterized in that an outdoor unit of the air conditioner comprises: a first heat exchanger, a second heat exchanger, a first fan corresponding to the first heat exchanger, and a second fan corresponding to the second heat exchanger, the air conditioner including: an acquisition unit and a control unit;

the acquisition unit is used for acquiring a first liquid pipe temperature of the first heat exchanger and a second liquid pipe temperature of the second heat exchanger after the heating time reaches a set threshold;

the control unit is used for controlling the first heat exchanger to defrost, controlling the first fan to stop running, controlling the second heat exchanger to keep heating and controlling the second fan to run if the first liquid pipe temperature is less than a first defrosting temperature threshold and the second liquid pipe temperature is greater than or equal to a second defrosting temperature threshold;

the air conditioner further includes: a judgment unit and an output unit;

the acquisition unit is also used for acquiring the return air temperature of an air inlet of an indoor unit of the air conditioner;

the control unit is also used for controlling a fan of the indoor unit to keep running if the return air temperature is greater than or equal to the difference value between the heating set temperature and the compensation value;

the judging unit is used for judging whether the indoor unit contains electric heating or not if the return air temperature is less than the difference value;

the control unit is also used for controlling the electric heating to heat when the indoor unit comprises the electric heating; when the indoor unit does not contain the electric heating, controlling to reduce the rotating speed of a fan of the indoor unit;

the output unit is used for outputting prompt information when the duration that the return air temperature is less than the difference value is determined to be greater than or equal to a time threshold, and the prompt information is used for prompting a user whether to reduce the heating set temperature;

the control unit is further used for controlling the second heat exchanger to defrost and controlling the second fan to stop running when rejection operation of a user is received; and controlling to reduce the heating set temperature when receiving the confirmation operation of the user.

5. The air conditioner according to claim 4,

the acquiring unit is further used for acquiring the air pipe pressure of the first heat exchanger after the first heat exchanger is defrosted;

the control unit is further used for controlling the first heat exchanger to heat and controlling the first fan to operate if the air pipe pressure is smaller than a set pressure value and the duration time reaches a first preset time; if the air pipe pressure is larger than or equal to the set pressure value, the temperature of the liquid pipe of the first heat exchanger is smaller than the first defrosting temperature threshold value at present, and the duration time of the liquid pipe of the first heat exchanger smaller than the first defrosting temperature threshold value reaches second preset time, the first heat exchanger is controlled to heat, and the first fan is controlled to run.

6. The air conditioner of claim 4, wherein the outdoor unit of the air conditioner further comprises: and the hydrophobic plate is arranged between the first heat exchanger and the second heat exchanger when the first heat exchanger and the second heat exchanger are vertically combined and placed, and is used for preventing the condensed water after the first heat exchanger is defrosted from falling onto the second heat exchanger for heating.

7. An air conditioner, characterized in that the air conditioner comprises: a processor, a memory, a communication interface, and a communication bus;

the processor is connected with the memory and the communication interface through the communication bus, the memory is used for storing computer execution instructions, and when the air conditioner runs, the processor executes the computer execution instructions stored in the memory so as to enable the air conditioner to execute the defrosting method of the air conditioner according to any one of claims 1-3.

8. A computer storage medium comprising computer-executable instructions that, when run on an air conditioner, cause the air conditioner to perform the defrosting method of the air conditioner of any one of claims 1-3.