CN112923517A

CN112923517A - Air conditioner defrosting control method and air conditioner

Info

Publication number: CN112923517A
Application number: CN202110311029.1A
Authority: CN
Inventors: 钱伟; 杨焕弟
Original assignee: Guangdong Jiwei Technology Co Ltd
Current assignee: Guangdong Jiwei Technology Co Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-06-08

Abstract

According to the air conditioner and the defrosting control method provided by the invention, the frosting degree of the outdoor heat exchanger when the air conditioner receives a shutdown signal can be accurately judged, so that whether the air conditioner needs to be defrosted firstly and then shut down is judged, the frost-carrying operation of the outdoor heat exchanger during next startup heating is completely avoided, the heating effect is improved, the poor heating effect and the waste of electric energy caused by the accumulation of a frost layer on the outdoor heat exchanger are effectively prevented, and the safe operation of the air conditioner is protected.

Description

Air conditioner defrosting control method and air conditioner

Technical Field

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

Background

When the air conditioner is in heating operation in winter and the outdoor environment temperature is low, the outdoor heat exchanger frosts to different degrees, so that the air conditioner can be automatically switched to a defrosting mode to melt the frost layer on the outdoor heat exchanger after a certain time interval. However, when the outdoor heat exchanger frosts seriously, but the air conditioner does not enter the defrosting mode, the air conditioner receives a shutdown signal, if the outdoor environment temperature is low, the frost layer on the outdoor heat exchanger cannot be melted automatically after shutdown, when the air conditioner is started for heating next time, because the frost layer is accumulated on the outdoor heat exchanger, the heating effect is poor, even because the frost layer is accumulated with higher speed, the later defrosting is not clean, the human body comfort is affected, and the electric energy is wasted, and the compressor can be started or a liquid refrigerant is sucked into the compressor in the running process to burn the compressor in serious cases.

At present, in the prior art, the frosting degree of an outdoor heat exchanger before shutdown is judged by using the outlet temperature of the outdoor heat exchanger, and then whether the shutdown is carried out after defrosting is carried out firstly according to the frosting severity degree is judged.

Disclosure of Invention

The invention provides an air conditioner defrosting control method and an air conditioner, aiming at solving the problems in the prior art, namely avoiding poor heating effect, electric energy waste and compressor damage caused by frost layer accumulation on an outdoor heat exchanger when the air conditioner is started for heating next time.

In order to achieve the above object, the present invention provides a defrosting control method for an air conditioner, comprising the steps of:

s1, receiving a shutdown operation signal when an air conditioner operates in a heating mode, detecting the consumed power P1 of a compressor before the shutdown signal is received by a power detection module, detecting the current L1 of the compressor at the moment before the shutdown signal by a current detection module, detecting the minimum value P0 of the consumed power of the compressor between preset times after heating startup operation by the power detection module, and detecting the minimum value L0 of the current of the compressor between the preset times after heating startup operation by the current detection module;

s2, judging the relation between P1 subtracted from P0 and a preset parameter delta P or the relation between L1 subtracted from L0 and a preset parameter delta L;

s3, judging the relation between the outdoor environment temperature T and the preset T0 before the air conditioner receives the shutdown signal;

and S4, the air conditioner is switched to a defrosting mode to operate, and the air conditioner is controlled to be turned off after the defrosting mode frosts.

Preferably, the step S2 of determining the relationship between the minimum value P0 of the power consumption of the compressor minus the power consumption P1 of the compressor and the preset parameter Δ P or the relationship between the minimum value L0 of the current of the compressor minus the current L1 of the compressor and the preset parameter Δ L includes: and judging the relation between the minimum value P0 of the power consumed by the compressor and the power consumed by the compressor P1 and the preset parameter delta P, and the relation between the minimum value L0 of the current of the compressor and the current of the compressor L1 and the preset parameter delta L, wherein the step S3 is carried out if a first condition or a second condition is met, and the shutdown is carried out if a third condition or a fourth condition is met.

Preferably, the step S3 of determining the relationship between the outdoor ambient temperature T before the air conditioner receives the shutdown signal and the preset outdoor ambient temperature comparison value T0 includes:

when the step S3 determines that the relationship between the outdoor ambient temperature T before the air conditioner receives the shutdown signal and the preset outdoor ambient temperature comparison value T0 satisfies the fifth condition, the process goes to step S4;

and when the step S3 determines that the relationship between the outdoor ambient temperature T before the air conditioner receives the shutdown signal and the preset outdoor ambient temperature comparison value T0 satisfies the sixth condition, controlling the air conditioner to shutdown.

Preferably, the first condition is that the minimum value P0 of the compressor power consumption minus the compressor power consumption P1 is greater than or equal to a preset parameter Δ P.

Preferably, the second condition is that the minimum value L0 of the compressor current minus the compressor current L1 is greater than or equal to a preset parameter Δ L.

Preferably, the third condition is that the minimum value P0 of the compressor power consumption minus the compressor power consumption P1 is smaller than the preset parameter Δ P.

Preferably, the fourth condition is that the minimum value L0 of the compressor current minus the compressor current L1 is smaller than the preset parameter Δ L.

Preferably, the fifth condition is that the outdoor ambient temperature T is less than or equal to a preset outdoor ambient temperature comparison value T0.

Preferably, the fifth condition is that the outdoor ambient temperature T is greater than a preset outdoor ambient temperature comparison value T0.

In order to achieve the above object, the present invention further provides an air conditioner for implementing the above defrosting control method, the air conditioner including:

the compressor is used for compressing the low-temperature low-pressure gaseous refrigerant by using the consumed electric energy to change the low-temperature low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant;

the power detection module is used for detecting the consumed power of the compressor;

the current detection module is used for detecting the current of the compressor;

the temperature detection module is used for detecting the outdoor environment temperature T;

the storage module is used for storing the detected data in real time;

and the central processing unit is used for judging and comparing the detected data, and switching the operation mode of the air conditioner and controlling the air conditioner to be shut down.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a flowchart of a defrosting method of an air conditioner according to an embodiment of the present invention;

fig. 2 is a flowchart of a defrosting method of an air conditioner according to another embodiment of the present invention;

fig. 3 is a block diagram illustrating an air conditioner according to an embodiment of the present invention.

In the drawings: 100-an air conditioner, 10-a compressor, 20-a power detection module, 30-a current detection module, 40-a temperature detection module, 50-a storage module and 60-a central processing unit.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The invention provides a defrosting control method of an air conditioner, and referring to fig. 1, the defrosting control method comprises the following steps:

In this embodiment, the air conditioner starts at the first time when the air conditioner enters the cooling mode, the power detection module starts to detect the minimum value P0 of the power consumed by the compressor between 3 minutes and 5 minutes after the heating startup operation, the current detection module detects the minimum value L0 of the compressor current between 3 minutes and 5 minutes after the heating startup operation, the temperature detection module detects the outdoor environment temperature value T when the air conditioner receives the shutdown signal, and whether the air conditioner needs to enter the defrosting mode is judged according to the detected data and then the air conditioner is shut down.

Further, as shown in fig. 2, in the embodiment of the present invention, when the step S2 determines that the P0 minus P1 and the preset parameter Δ P have a size relationship or the L0 minus L1 and the preset parameter Δ L have a size relationship, specifically, if the first condition or the second condition is satisfied, the step S3 is performed, and if the third condition or the fourth condition is satisfied, the shutdown is performed.

Further, as shown in fig. 2, in the embodiment of the present invention, when it is determined in step S3 that the relationship between the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 satisfies the fifth condition, step S4 is entered, specifically, in step S3, it can be better determined whether the air conditioner needs to enter the defrosting mode and then be shutdown through the outdoor environment temperature T and the preset outdoor environment temperature comparison value T0, when the fifth condition is satisfied, it indicates that the air conditioner needs to operate in the defrosting mode, step S4 is entered to stop the air conditioner after defrosting is completed, and when the sixth condition is satisfied, it indicates that the air conditioner does not need to operate in the defrosting mode, and the air conditioner is directly controlled to be shutdown.

It should be understood here that: the central processing unit of the air conditioner detects the consumed power of the compressor through the power detection module, the current detection module detects the current of the compressor to judge the frosting degree, and then whether defrosting is carried out firstly and then the air conditioner is shut down is judged according to the difference of the frosting degree and the outdoor environment temperature.

Preferably, the first condition is that the minimum value P0 of the compressor consumption power minus the compressor consumption power P1 is greater than or equal to a preset parameter Δ P.

Here, the specific judgment range belongs to the first condition, and the first condition is satisfied when a value obtained by subtracting the compressor consumption power P1 from the minimum value P0 of the compressor consumption power is greater than or equal to a preset parameter Δ P.

Preferably, the second condition is that the minimum value L0 of the compressor current minus the compressor current L1 is greater than or equal to the preset parameter Δ L.

Here, the specific judgment range belongs to the second condition, and the second condition is satisfied when the minimum value L0 of the compressor current minus the compressor current L1 is greater than or equal to the preset parameter Δ L.

Preferably, the third condition is that the minimum value P0 of the compressor consumption power minus the compressor consumption power P1 is smaller than the preset parameter Δ P.

Here, the specific judgment range belongs to the second condition, and the third condition is satisfied when the value obtained by subtracting the compressor power consumption P1 from the minimum value P0 of the compressor power consumption is smaller than the preset parameter Δ P.

Preferably, the fourth condition is that the minimum value L0 of the compressor current minus the compressor current L1 is less than the preset parameter Δ L.

Here, the fourth condition is satisfied when the minimum value L0 of the compressor current minus the compressor current L1 is smaller than the preset parameter Δ L.

Specifically, the fifth condition may be that the outdoor ambient temperature T is less than or equal to the preset outdoor ambient temperature comparison value T0, where the preset outdoor ambient temperature comparison value T0 may be set to 0-2 ℃.

Here, the specific judgment range pertaining to the fifth condition is that the outdoor environment temperature T is less than or equal to the preset outdoor environment temperature comparison value T0, and the preset outdoor environment temperature comparison value T0 may be set to 0-2 ℃.

Specifically, the sixth condition may be that the outdoor ambient temperature T is greater than the preset outdoor ambient temperature comparison value T0, where the preset outdoor ambient temperature comparison value T0 may be set to 0-2 ℃.

Here, the specific judgment range pertaining to the sixth condition is that the outdoor environment temperature T is greater than the preset outdoor environment temperature comparison value T0, and the preset outdoor environment temperature comparison value T0 may be set to 0-2 ℃.

In another aspect, the present invention further provides an air conditioner for implementing the above defrosting control method, and referring to fig. 3, the air conditioner includes:

the storage module is used for storing the detected data in real time;

The power detection module is used for detecting the consumed power of the compressor, the current detection module is used for detecting the current of the compressor, the temperature detection module is used for detecting the temperature of the outdoor environment, the detected data are stored by the storage module, the comparison of the data can be realized by combining the central processing unit, the frosting condition is judged, if the first condition or the second condition is met, the frosting of the outdoor heat exchanger can be considered, if the third condition or the fourth condition is met, the frosting of the outdoor heat exchanger can be considered, or the frosting is less, the air conditioner can be directly controlled to be shut down, in order to prevent the judgment error, the temperature of the outdoor environment is considered, the comparison is carried out by combining the detected outdoor environment temperature and a preset environment temperature comparison value T0, if the outdoor environment temperature is high enough, the frosting of the outdoor heat exchanger can be automatically melted.

In this scheme, receive the shutdown signal when the air conditioner when the heating mode operation, the controller of air conditioner judges the frosting degree automatically, and then judges whether earlier defrosting is carried out and shut down according to the difference of frosting degree and consideration outdoor ambient temperature, can accurately judge the frosting degree of outdoor heat exchanger when receiving the shutdown signal of air conditioner, and then judge whether need earlier defrosting and shut down, outdoor heat exchanger takes the frost operation when avoiding the start to heat next time completely, promote the effect of heating, avoid the electric energy waste, protect the air conditioner safe operation.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments. In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium. The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The defrosting control method of the air conditioner is characterized by comprising the following steps:

2. The air conditioner defrosting control method of claim 1, wherein the step S2 of determining the minimum value P0 of the compressor consumption power minus the relationship between the compressor consumption power P1 and the preset parameter Δ P or the relationship between the minimum value L0 of the compressor current minus the compressor current L1 and the preset parameter Δ L comprises: and judging the relation between the minimum value P0 of the consumed power of the compressor and the consumed power P1 of the compressor and a preset parameter delta P or the relation between the minimum value L0 of the current of the compressor and the current L1 of the compressor and the preset parameter delta L, if the first condition or the second condition is met, performing step S3, and if the third condition or the fourth condition is met, performing shutdown.

3. The defrosting control method of an air conditioner according to claim 1, wherein the step S3 of determining the magnitude relationship between the outdoor environment temperature T before the air conditioner receives the shutdown signal and the preset outdoor environment temperature comparison value T0 comprises:

4. The air conditioner defrost control method of claim 2, wherein the first condition is that a value obtained by subtracting the compressor consumption power P1 from the minimum value P0 of the compressor consumption power is greater than or equal to a preset parameter Δ P.

5. The air conditioner defrost control method of claim 2, wherein the second condition is that a value obtained by subtracting the compressor current L1 from a minimum value L0 of the compressor current is greater than or equal to a preset parameter al.

6. The air conditioner defrost control method of claim 2, wherein the third condition is that a value obtained by subtracting the compressor consumption power P1 from the minimum value P0 of the compressor consumption power is less than a preset parameter Δ P.

7. The air conditioner defrost control method of claim 2, wherein the fourth condition is that a value obtained by subtracting the compressor current L1 from a minimum value L0 of the compressor current is less than a preset parameter al.

8. The air conditioner defrost control method of claim 3, wherein the fifth condition is that the outdoor ambient temperature T is less than or equal to a preset outdoor ambient temperature comparison value T0.

9. The air conditioner defrost control method of claim 3, wherein the fifth condition is that the outdoor ambient temperature T is greater than a preset outdoor ambient temperature comparison value T0.

10. An air conditioner for implementing the defrosting control method of the air conditioner according to any one of the above items 1 to 9, the air conditioner comprising:

the temperature detection module is used for detecting the outdoor environment temperature;

the storage module is used for storing the detected data in real time;