CN116182322A

CN116182322A - Method and device for preventing liquid impact of air conditioner, air conditioner and storage medium

Info

Publication number: CN116182322A
Application number: CN202211096245.XA
Authority: CN
Inventors: 林超; 王飞; 许文明; 张心怡; 李阳
Original assignee: HEFEI HAIER AIR CONDITIONER CO Ltd; Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: HEFEI HAIER AIR CONDITIONER CO Ltd; Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2023-05-30

Abstract

The application relates to the technical field of intelligent household appliances and discloses a liquid impact prevention method for an air conditioner. Liquid impact prevention for air conditionerThe method of (1) comprises: acquiring the surface temperature T of the outdoor heat exchanger when the air conditioner is in the defrosting mode and the defrosting mode is not finished _wo The method comprises the steps of carrying out a first treatment on the surface of the When the surface temperature T _wo Greater than or equal to a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ And when the first control valve is controlled to be opened, the refrigerant stored in the first liquid storage tank flows into the supercooling section passage. The method can reduce the amount of liquid refrigerant directly entering the compressor from the liquid storage tank and relieve the liquid impact phenomenon of the compressor when defrosting is completed and the air conditioner is switched back to the heating mode again. The application also discloses a device for preventing the air conditioner from being impacted by liquid, the air conditioner and a storage medium.

Description

Method and device for preventing liquid impact of air conditioner, air conditioner and storage medium

Technical Field

The application relates to the technical field of intelligent household appliances, in particular to a method for preventing liquid impact of an air conditioner, an air conditioner and a storage medium.

Background

An air conditioner refers to an air conditioner that can operate a heating mode or a cooling mode to adjust an indoor temperature. The air conditioner is provided with a refrigerant circulation loop, the refrigerant quantity filled in the refrigerant circulation loop is the optimal refrigerant quantity required under the rated working condition of the air conditioner, and the quantity of circulating refrigerant in the refrigerant circulation loop is a fixed value. In the non-rated working condition (such as low-load working condition), the circulating refrigerant quantity in the refrigerant circulating pipeline is not the optimal refrigerant quantity in the current working condition, and the air conditioner cannot exert the optimal performance. Therefore, more and more heat exchangers of the air conditioner are provided with liquid storage tanks, and the liquid storage tanks are utilized to adjust the circulating refrigerant quantity in the refrigerant circulation loop, so that the air conditioner has the adjusting capability of the circulating refrigerant quantity adapting to the working condition of the air conditioner, and the performance of the air conditioner is improved. When the air conditioner is in a heating mode, frosting of the outdoor heat exchanger is often caused, and in order to ensure the heating effect of the air source heat pump unit, the air source heat pump unit enters a defrosting working condition after the frosting of the outdoor heat exchanger reaches a certain degree.

The related art provides a defrosting method, in which when an outdoor heat exchanger frosts, a mode of controlling an air conditioner is switched from a heating mode to a cooling mode, and after defrosting is completed, the air conditioner is controlled to be switched back to the heating mode again.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

under the condition that the air conditioner is in defrosting, the load of the air conditioner is lower, and a certain amount of liquid refrigerant is stored in the liquid storage tank. In the defrosting method provided in the related art, after defrosting is completed, when the air conditioner is switched back to the heating mode again, liquid refrigerant in the liquid storage tank is easy to directly enter the compressor, so that liquid impact of the compressor is caused.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a liquid impact prevention method and device for an air conditioner, the air conditioner and a storage medium, which can reduce the amount of liquid refrigerant directly entering a compressor from a liquid storage tank and relieve the liquid impact phenomenon of the compressor when defrosting is completed and the air conditioner is switched back to a heating mode.

In some embodiments, the outdoor heat exchanger of the air conditioner includes: a plurality of heat exchange passages; the supercooling section passage is communicated with the plurality of heat exchange passages; and a first liquid storage tank arranged among the heat exchange passages and used for being in the airThe regulator is in a refrigeration mode and stores part of refrigerant when the load is low, the first liquid storage tank is communicated with the supercooling section passage through a first liquid pipe, and the first liquid pipe is provided with a first control valve; the method for preventing the liquid impact of the air conditioner comprises the following steps: acquiring the surface temperature T of the outdoor heat exchanger when the air conditioner operates in the defrosting mode and the defrosting mode is not finished _wo The method comprises the steps of carrying out a first treatment on the surface of the When the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ And when the first control valve is controlled to be opened, the refrigerant stored in the first liquid storage tank flows into the supercooling section passage.

The method for preventing liquid impact of the air conditioner provided by the embodiment of the disclosure obtains the surface temperature T of the outdoor heat exchanger when the air conditioner operates in a defrosting mode and the defrosting mode is not finished _wo . When the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ And when the first control valve is controlled to be opened, the refrigerant stored in the first liquid storage tank flows into the supercooling section passage. Therefore, when defrosting is completed and the air conditioner is switched back to the heating mode again, the liquid refrigerant quantity directly entering the compressor from the first liquid storage tank can be effectively reduced, and the liquid impact of the compressor is relieved.

Optionally, the method further comprises: when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve is closed, the compressor of the air conditioner is stopped, and the reversing valve of the air conditioner is controlled to switch directions, wherein the second preset time period t ₂ > said first preset time period t ₁ 。

Optionally, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve is controlled to be closed, the compressor of the air conditioner is controlled to be stopped, and the reversing valve of the air conditioner is controlled to switch directions, the method comprises the following steps: when the surface temperature T _wo Not less than a first preset temperature T _w1 Long duration of timeAt or equal to a first sub-preset time t ₂₁ When the first control valve is controlled to be closed, the compressor is controlled to be stopped; when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to the second sub-preset time period t ₂₂ When the reversing valve is in a closed state, the reversing valve is controlled to switch the direction; wherein t is ₁ ＜t ₂₁ ＜t ₂₂ 。

Optionally, the outdoor heat exchanger further comprises: the second liquid storage tank is arranged among the heat exchange passages and is arranged on a heat exchange passage different from the first liquid storage tank, the second liquid storage tank is communicated with the first liquid storage tank through a second liquid pipe, the second liquid pipe is provided with a second control valve, and in the method for preventing the liquid impact of the air conditioner, when the surface temperature T is as follows _wo Greater than or equal to a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ When it is, further comprising: and controlling the second control valve to be opened so that the refrigerant stored in the second liquid storage tank flows into the first liquid storage tank.

Optionally, in the method for preventing liquid impact of an air conditioner, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When it is, further comprising: and controlling the second control valve to be closed.

Optionally, in the method for preventing liquid impact of an air conditioner, when the surface temperature T _wo Not less than a first preset temperature T _w1 The duration of the time period is greater than or equal to the first sub-preset time period t ₂₁ When it is, further comprising: and controlling the second control valve to be closed.

Optionally, the outdoor heat exchanger is provided with a first refrigerant inlet and outlet and a second refrigerant inlet and outlet, and the outdoor heat exchanger further includes: the refrigerant pipes form a first heat exchange passage, a second heat exchange passage and a third heat exchange passage; the gas collecting tube is communicated with the first refrigerant inlet and outlet and is communicated with the first end of the first heat exchange passage; a first shunt element communicated with the gas collecting pipe through a first bypass pipeline and communicated with a first end of the third heat exchange channel; the first bypass pipeline is provided with a first valve; a second flow dividing element in communication with a second end of the second heat exchange path; a third flow dividing element which is communicated with the second end of the third heat exchange passage, is communicated with the second flow dividing element through a second bypass pipeline, and is communicated with the second refrigerant inlet and outlet through a supercooling section passage; the second bypass pipeline is provided with a second valve; wherein the first liquid storage tank is also communicated with the first end of the second heat exchange passage and the first flow dividing element; the second liquid storage tank is also communicated with the second end of the first heat exchange passage and the second flow dividing element.

In some embodiments, the outdoor heat exchanger of the air conditioner includes: a plurality of heat exchange passages; the supercooling section passage is communicated with the plurality of heat exchange passages; the first liquid storage tank is arranged among the heat exchange passages and is used for storing part of refrigerant when the air conditioner is in a refrigeration mode and the load is low, the first liquid storage tank is communicated with the supercooling section passage through a first liquid pipe, and the first liquid pipe is provided with a first control valve; the device for preventing liquid impact of an air conditioner comprises: a detection module configured to detect a temperature T of the outdoor heat exchanger in a case where the air conditioner is defrosted _wo The method comprises the steps of carrying out a first treatment on the surface of the A control module configured to control the temperature T of the outdoor heat exchanger _wo The opening degree of the first control valve, the direction of the reversing valve and the frequency of the compressor are controlled.

In some embodiments, the air conditioner includes a processor and a memory storing program instructions, the processor being configured, when executing the program instructions, to perform the above-described method for liquid impact prevention of the air conditioner.

In some embodiments, the storage medium stores program instructions that, when executed, perform the method for preventing liquid impact for an air conditioner described above.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic structural view of an outdoor heat exchanger of an air conditioner according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of another outdoor heat exchanger of an air conditioner according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a method for protecting an air conditioner from liquid impact according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another method for preventing liquid hammer of an air conditioner provided by an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of another method for preventing liquid hammer of an air conditioner provided by an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another method for protecting an air conditioner from liquid impact provided by an embodiment of the present disclosure;

FIG. 7 is a schematic view of an apparatus for preventing liquid impact of an air conditioner according to an embodiment of the present disclosure;

fig. 8 is a schematic view of another apparatus for preventing liquid impact of an air conditioner according to an embodiment of the present disclosure.

Reference numerals:

1. a supercooling section passage; 2. a first liquid storage tank; 3. a second liquid storage tank; 4. a gas collecting tube; 5. a first shunt element; 6. a second shunt element; 7. a third shunt element; 8. a first heat exchange passage; 9. a second heat exchange path; 10. a third heat exchange path; 01. a first refrigerant inlet and outlet; 02. a second refrigerant inlet and outlet; 101. a first liquid pipe; 102. a first control valve; 103. a second liquid pipe; 104. a second control valve; 105. a first bypass line; 106. a first valve; 107. a second bypass line; 108. and a second valve.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

The embodiment of the disclosure provides an air conditioner, which comprises a refrigerant circulation loop, a compressor, an indoor heat exchanger, a throttling device, an outdoor heat exchanger and a reversing valve.

Wherein, compressor, indoor heat exchanger, throttling arrangement and outdoor heat exchanger set up in proper order in refrigerant circulation circuit. By switching the direction of the reversing valve, the air conditioner can be switched between a heating mode and a cooling mode.

Referring to fig. 1, an outdoor heat exchanger of an air conditioner according to an embodiment of the present disclosure includes a plurality of heat exchange passages, a supercooling section passage 1, and a first liquid storage tank 2.

The supercooling block passage 1 communicates with a plurality of heat exchange passages. The first liquid storage tank 2 is arranged among the heat exchange passages and is used for storing part of refrigerant when the air conditioner is in a refrigeration mode and the load is low, the first liquid storage tank 2 is communicated with the supercooling section passage 1 through a first liquid pipe 101, and the first liquid pipe 101 is provided with a first control valve 102.

According to the air conditioner provided by the embodiment of the disclosure, when the air conditioner is in the refrigeration mode and the load is low, the first liquid storage tank 2 can be used for storing the refrigerant. Therefore, excessive liquid refrigerant can be prevented from forming a liquid film in a pipe section where the refrigerant is not completely condensed to increase heat exchange resistance, and the heat exchange effect of the outdoor heat exchanger and the performance of the air conditioner are improved.

Optionally, referring to fig. 2, the outdoor heat exchanger further comprises a second liquid storage tank 3. The second liquid storage tank 3 is arranged among the heat exchange passages and is arranged on a heat exchange passage different from the first liquid storage tank 2, the second liquid storage tank 3 is communicated with the first liquid storage tank 2 through a second liquid pipe 103, and the second liquid pipe 103 is provided with a second control valve 104.

By the arrangement, the capacity of the air conditioner for regulating the circulating refrigerant quantity in the refrigerant circulating loop can be improved, and the performance of the air conditioner is further improved.

Optionally, referring to fig. 2, the outdoor heat exchanger is provided with a first refrigerant inlet 01 and a second refrigerant inlet 02, and the outdoor heat exchanger further includes: a plurality of refrigerant pipes, a header 4, a first flow dividing element 5, a second flow dividing element 6, and a third flow dividing element 7.

Wherein the plurality of refrigerant tubes form a first heat exchange path 8, a second heat exchange path 9 and a third heat exchange path 10. The header 4 communicates with the first refrigerant inlet/outlet 01 and with a first end of the first heat exchange passage 8. The first flow dividing element 5 communicates with the header 4 via a first bypass line 105 and with a first end of the third heat exchange path 10. The first bypass line 105 is provided with a first valve 106. The second flow dividing element 6 communicates with a second end of the second heat exchange passage 9. The third bypass element 7 communicates with the second end of the third heat exchange passage 10, with the second bypass line 107, with the second bypass element 6, and with the second refrigerant inlet/outlet 02 through the supercooling stage passage 1. The second bypass line 107 is provided with a second valve 108. Wherein the first liquid storage tank 2 is also in communication with the first end of the second heat exchange path 9 and the first flow dividing element 5. The second liquid storage tank 3 is also in communication with the second end of the first heat exchange path 8 and the second flow dividing element 6.

In the air conditioner provided in the embodiment of the present disclosure, when the air conditioner is in the cooling mode and is in the low-load working condition, the first control valve 102, the first valve 106 and the second valve 108 are all closed, and the second control valve 104 is opened or closed. The gaseous refrigerant enters the gas collecting tube 4 from the first refrigerant inlet and outlet 01, and then enters the second liquid storage tank 3 after heat exchange through the first heat exchange passage 8. The first gas-liquid separation is carried out in the second liquid storage tank 3, the liquid refrigerant obtained by separation directly enters the first liquid storage tank 2 or is stored in the second liquid storage tank 3, and the gaseous refrigerant obtained by separation enters the first liquid storage tank 2 after heat exchange through the second heat exchange passage 9. The second gas-liquid separation is performed in the first liquid storage tank 2, and the separated gaseous refrigerant sequentially flows through the first flow dividing element 5, the third heat exchange passage 10, the third flow dividing element 7 and the supercooling section passage 1, and finally flows out of the outdoor heat exchanger from the second refrigerant inlet and outlet 02. The separated liquid refrigerant is stored in the first liquid storage tank 2. When the air conditioner is in a refrigerating mode and the air conditioner is in a low-load working condition, part of liquid refrigerant is stored in the first liquid storage tank 2 or the second liquid storage tank 3, so that the quantity of circulating refrigerant is reduced. The heat exchange resistance is prevented from being increased due to the fact that excessive liquid refrigerant forms a liquid film in the pipe section where the refrigerant is not completely condensed, and the heat exchange effect of the outdoor heat exchanger and the performance of the air conditioner are improved.

It will be appreciated that the air conditioner operates in a cooling mode to defrost the outdoor heat exchanger and that the load on the air conditioner is low when defrost. That is, the operating state of the air conditioner when the defrosting mode is operated is equivalent to the operating state of the air conditioner when the cooling mode is operated and is in the low load condition.

Optionally, the first valve 106 is a one-way valve, and the conduction direction of the one-way valve is that the refrigerant is allowed to flow from the first flow dividing element 5 to the gas collecting tube 4, and the refrigerant is prevented from flowing from the gas collecting tube 4 to the first flow dividing element 5.

Optionally, the second valve 108 is a one-way valve, and the conduction direction of the one-way valve is that the refrigerant is allowed to flow from the third flow dividing element 7 to the second flow dividing element 6, and the refrigerant is prevented from flowing from the second flow dividing element 6 to the third flow dividing element 7.

In the air conditioner according to the embodiment of the present disclosure, when the defrosting method provided in the related art is operated, a certain amount of liquid refrigerant is stored in the first liquid storage tank 2 and/or the second liquid storage tank 3. When defrosting is finished, the air conditioner is switched back to a heating mode, and the liquid refrigerant stored in the first liquid storage tank 2 directly enters the first flow dividing element 5 and flows into the compressor to cause liquid impact of the compressor. The liquid refrigerant stored in the second liquid storage tank 3 can cause excessive liquid refrigerant entering the first heat exchange passage 8, and the liquid refrigerant is incompletely evaporated, so that the refrigerant flowing to the compressor is increased, and the liquid impact of the compressor is aggravated.

In connection with the air conditioner shown in fig. 1 and 2, embodiments of the present disclosure provide a method for preventing liquid impact of the air conditioner. Referring to fig. 3, the method includes:

s301, when the air conditioner operates in a defrosting mode and the defrosting mode is not finished, acquiring the surface temperature T of the outdoor heat exchanger _wo 。

S302, when the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ At this time, the first control valve 102 is controlled to be opened, and the refrigerant stored in the first liquid tank 2 flows into the supercooling stage passage 1.

According to the method for preventing the air conditioner from being hit by liquid, when the air conditioner operates in a defrosting mode and the defrosting mode is not finished, the surface temperature T of the outdoor heat exchanger is obtained _wo . When the surface temperature T _wo Greater than or equal to a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ At this time, the first control valve 102 is controlled to be opened, and the refrigerant stored in the first liquid tank 2 flows into the supercooling stage passage 1. Therefore, when defrosting is completed and the air conditioner is switched back to the heating mode again, the liquid refrigerant quantity directly entering the compressor from the first liquid storage tank 2 can be effectively reduced, and the liquid impact of the compressor is relieved.

Optionally, the method for preventing liquid impact of the air conditioner further comprises the following steps: when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve 102 is controlled to be closed, the compressor of the air conditioner is controlled to be shut down, and the reversing valve of the air conditioner is controlled to switch directions. Wherein the second preset time period t ₂ > first pre-treatmentSet time period t ₁ 。

With this arrangement, the air conditioner can complete defrosting, and the compressor liquid hammer when the defrosting completed air conditioner is switched back to the heating mode can be alleviated. Specifically, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ At this time, defrosting is completed, and the liquid refrigerant stored in the first liquid storage tank 2 is sufficiently released. The first control valve 102 is controlled to be closed, the compressor of the air conditioner is controlled to be turned off, and the direction of the reversing valve of the air conditioner is controlled to be switched to the heating mode.

In connection with the air conditioner shown in fig. 1 and 2, another method for preventing liquid impact of the air conditioner is provided in an embodiment of the present disclosure. Referring to fig. 4, the method includes:

s401, when the air conditioner operates in the defrosting mode and the defrosting mode is not finished, acquiring the surface temperature T of the outdoor heat exchanger _wo 。

S402, when the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ At this time, the first control valve 102 is controlled to be opened, and the refrigerant stored in the first liquid tank 2 flows into the supercooling stage passage 1.

S403, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve 102 is controlled to be closed, the compressor of the air conditioner is controlled to be turned off, and the reversing valve of the air conditioner is controlled to switch directions.

Wherein the second preset time period t ₂ > first preset time period t ₁ 。

According to the method for preventing the air conditioner from being hit by liquid, when the air conditioner operates in a defrosting mode and the defrosting mode is not finished, the surface temperature T of the outdoor heat exchanger is obtained _wo . When the surface temperature T _wo Greater than or equal to a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ At this time, the first control valve 102 is controlled to be opened, and the refrigerant stored in the first liquid tank 2 flows into the supercooling stage passage 1. Meter clockSurface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When defrosting is completed, the first control valve 102 is controlled to be closed, the compressor of the air conditioner is controlled to be stopped, the reversing valve of the air conditioner is controlled to switch the direction, and the air conditioner is switched back to the heating mode again. At this time, the liquid refrigerant stored in the first liquid storage tank 2 is discharged, so that the amount of the liquid refrigerant directly entering the compressor from the first liquid storage tank 2 can be effectively reduced, and the liquid impact of the compressor can be relieved.

Alternatively, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve 102 is controlled to be closed, the compressor of the air conditioner is controlled to be turned off, and the reversing valve of the air conditioner is controlled to switch directions (step S403), comprising:

s4031, when the surface temperature T _wo Not less than a first preset temperature T _w1 The duration of the time period is greater than or equal to the first sub-preset time period t ₂₁ When the compressor is turned off, the first control valve 102 is controlled to be turned off.

S4032, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to the second sub-preset time period t ₂₂ And controlling the reversing valve to switch the direction.

Wherein t is ₁ ＜t ₂₁ ＜t ₂₂ 。

When the surface temperature T _wo Not less than a first preset temperature T _w1 The duration of the time period is greater than or equal to the first sub-preset time period t ₂₁ When the liquid refrigerant stored in the first liquid storage tank 2 is discharged, the first control valve 102 is controlled to be closed, and the compressor is controlled to be shut down, so that preparation is made for switching the air conditioner back to the heating mode. When the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to the second sub-preset time period t ₂₂ And when the direction changing valve is controlled to change the direction, the air conditioner is switched back to the heating mode.

In addition, when the air conditioner is in the defrosting mode and when the air conditioner is in the heating mode, the flow of the refrigerant is reversed. By means of the arrangement, the first control valve 102 is controlled to be closed, the compressor is stopped and the direction of the reversing valve is switched, so that the influence of the increase of the flow resistance of the refrigerant on the heat exchange effect when the air conditioner is switched from the defrosting mode to the heating mode immediately can be avoided. Specifically, the first control valve 102 is controlled to close and the compressor is controlled to stop, and the flow rate of the refrigerant is gradually slowed down to stop under the action of the resistance. Then, the direction of the reversing valve is controlled to be switched to a heating mode, the resistance of the refrigerant is small, and the air conditioner can realize rapid heat supply.

Optionally, the outdoor heat exchanger further comprises a second liquid storage tank 3. The second liquid storage tank 3 is arranged among the heat exchange passages and is arranged on a heat exchange passage different from the first liquid storage tank 2, the second liquid storage tank 3 is communicated with the first liquid storage tank 2 through a second liquid pipe 103, and the second liquid pipe 103 is provided with a second control valve 104. In the method for preventing liquid impact of air conditioner, when the surface temperature T _wo Greater than or equal to a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ When it is, further comprising: the second control valve 104 is controlled to open, so that the refrigerant stored in the second liquid storage tank 3 flows into the first liquid storage tank 2.

When the air conditioner operates in a heating mode, the state of the refrigerant flowing through the first heat exchange passage 8 is in a gas-liquid two-phase state under normal conditions. When the air conditioner is switched from the defrosting mode to the heating mode, a large amount of liquid refrigerant may be stored in the second liquid storage tank 3, and the excessive liquid refrigerant flows through the first heat exchange passage 8, so that the liquid refrigerant is incompletely evaporated, and a part of liquid refrigerant flows to the compressor to cause liquid impact of the compressor. In addition, if the load of the heating operation of the air conditioner is large, it takes more time for the liquid refrigerant stored in the second liquid storage tank 3 to return to the system circulation again, and the user experience is poor after the time for the air conditioner to blow hot air again is prolonged. By the arrangement, the liquid refrigerant stored in the second liquid storage tank 3 can flow out, and liquid impact of the compressor is avoided. The liquid refrigerant stored in the second liquid tank 3 flows into the first liquid tank 2, and further flows from the first liquid tank 2 into the supercooling block passage 1. Therefore, the time for the liquid refrigerant stored in the second liquid storage tank 3 to return to the system circulation again can be shortened, the time for the air conditioner to blow hot air again can be shortened, and the use experience of a user can be improved.

In connection with the air conditioner shown in fig. 1 and 2, another method for preventing liquid impact of the air conditioner is provided in an embodiment of the present disclosure. Referring to fig. 5, the method includes:

s501, when the air conditioner operates in a defrosting mode and the defrosting mode is not finished, acquiring the surface temperature T of the outdoor heat exchanger _wo 。

S502, when the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ When the second control valve 104 is controlled to be opened, the refrigerant stored in the second liquid storage tank 3 flows into the first liquid storage tank 2; the first control valve 102 is controlled to open, so that the refrigerant stored in the first liquid storage tank 2 flows into the supercooling stage passage 1.

Optionally, in the method for preventing liquid impact of the air conditioner, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When it is, further comprising: the second control valve 104 is controlled to close. After the liquid refrigerant stored in the second liquid storage tank 3 is released, the second control valve 104 is controlled to be closed, so as to prepare for switching the heating mode of the air conditioner.

In connection with the air conditioner shown in fig. 1 and 2, another method for preventing liquid impact of the air conditioner is provided in an embodiment of the present disclosure. Referring to fig. 6, the method includes:

s601, when the air conditioner operates in a defrosting mode and the defrosting mode is not finished, acquiring the surface temperature T of the outdoor heat exchanger _wo 。

S602, when the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ When the second control valve 104 is controlled to be opened, the refrigerant stored in the second liquid storage tank 3 flows into the first liquid storage tank 2; the first control valve 102 is controlled to open, so that the refrigerant stored in the first liquid storage tank 2 flows into the supercooling stage passage 1.

S603, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve 102 and the second control valve 104 are controlled to be closed, the air conditioner is controlledThe compressor of the air conditioner is turned off, and the direction of the reversing valve of the air conditioner is controlled.

Optionally, in the method for preventing liquid impact of the air conditioner, when the surface temperature T _wo Not less than a first preset temperature T _w1 The duration of the time period is greater than or equal to the first sub-preset time period t ₂₁ When it is, further comprising: the second control valve 104 is controlled to close. After the liquid refrigerant stored in the second liquid storage tank 3 is released, the second control valve 104 is controlled to be closed, so as to prepare for switching the heating mode of the air conditioner.

Alternatively, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve 102 and the second control valve 104 are controlled to be closed, the compressor of the air conditioner is controlled to be turned off, and the direction of the reversing valve of the air conditioner is controlled to be switched (step S603), comprising:

s6031 when the surface temperature T _wo Not less than a first preset temperature T _w1 The duration of the time period is greater than or equal to the first sub-preset time period t ₂₁ When the compressor is shut down, the first control valve 102 and the second control valve 104 are controlled to be closed.

S6032 when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to the second sub-preset time period t ₂₂ And controlling the reversing valve to switch the direction.

Wherein t is ₁ ＜t ₂₁ ＜t ₂₂ 。

In connection with the air conditioner shown in fig. 1 and 2, embodiments of the present disclosure provide a device for preventing liquid impact of the air conditioner. Referring to fig. 7, the apparatus includes an acquisition module 71 and a control module 72.

The acquisition module 71 is configured to acquire the surface temperature T of the outdoor heat exchanger when the air conditioner is in the defrosting mode and the defrosting mode is not completed _wo 。

The control module 72 is configured to, when the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is greater than or equal to a first presetDuration t ₁ And when the first control valve is controlled to be opened, the refrigerant stored in the first liquid storage tank flows into the supercooling section passage.

The device for preventing liquid impact of an air conditioner provided in the embodiment of the disclosure obtains the surface temperature T of an outdoor heat exchanger when the air conditioner operates in a defrosting mode and the defrosting mode is not finished _wo . When the surface temperature T _wo Greater than or equal to a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ And when the first control valve is controlled to be opened, the refrigerant stored in the first liquid storage tank flows into the supercooling section passage. Therefore, when defrosting is completed and the air conditioner is switched back to the heating mode again, the liquid refrigerant quantity of the first liquid storage tank directly entering the compressor can be effectively reduced, and the liquid impact phenomenon of the compressor is relieved.

As shown in connection with fig. 8, an embodiment of the present disclosure provides an apparatus for preventing a liquid impact of an air conditioner, including a processor (processor) 800 and a memory (memory) 801. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 802 and a bus 803. The processor 800, the communication interface 802, and the memory 801 may communicate with each other via the bus 803. The communication interface 802 may be used for information transfer. The processor 800 may call logic instructions in the memory 801 to perform the method for preventing a liquid hammer of the air conditioner of the above-described embodiment.

Further, the logic instructions in the memory 801 described above may be implemented in the form of software functional units and sold or used as a separate product, and may be stored in a computer readable storage medium.

The memory 801 is a computer readable storage medium that may be used to store a software program, a computer executable program, and program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 800 executes functional applications and data processing by executing program instructions/modules stored in the memory 801, i.e., implements the method for preventing a liquid impact of an air conditioner in the above-described embodiment.

The memory 801 may include a storage program area that may store an operating system, at least one application program required for functions, and a storage data area; the storage data area may store data created according to the use of the terminal device, etc. In addition, the memory 801 may include a high-speed random access memory, and may also include a nonvolatile memory.

The embodiment of the disclosure provides a computer readable storage medium, which stores program instructions, wherein the program instructions execute the method for preventing the liquid impact of the air conditioner when in operation.

The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-described method for protecting an air conditioner from liquid impact.

The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A method for preventing liquid impact of an air conditioner is characterized in that,

the outdoor heat exchanger of the air conditioner includes:

a plurality of heat exchange passages;

the supercooling section passage is communicated with the plurality of heat exchange passages; and, a step of, in the first embodiment,

the first liquid storage tank is arranged among the heat exchange passages and is used for storing part of refrigerant when the air conditioner is in a refrigeration mode and the load is low, the first liquid storage tank is communicated with the supercooling section passage through a first liquid pipe, and the first liquid pipe is provided with a first control valve;

the method for preventing the liquid impact of the air conditioner comprises the following steps:

acquiring the surface temperature T of the outdoor heat exchanger when the air conditioner operates in the defrosting mode and the defrosting mode is not finished _wo ；

When the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ And when the first control valve is controlled to be opened, the refrigerant stored in the first liquid storage tank flows into the supercooling section passage.

2. The method according to claim 1, wherein the method further comprises:

when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve is controlled to be closed, the air conditioner is controlledThe compressor of the air conditioner is stopped, and the reversing valve of the air conditioner is controlled to switch the direction,

wherein the second preset time period t ₂ > said first preset time period t ₁ 。

3. The method according to claim 2, wherein said temperature T of said surface _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When the first control valve is controlled to be closed, the compressor of the air conditioner is controlled to be stopped, and the reversing valve of the air conditioner is controlled to switch directions, the method comprises the following steps:

when the surface temperature T _wo Not less than a first preset temperature T _w1 The duration of the time period is greater than or equal to the first sub-preset time period t ₂₁ When the first control valve is controlled to be closed, the compressor is controlled to be stopped;

when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to the second sub-preset time period t ₂₂ When the reversing valve is in a closed state, the reversing valve is controlled to switch the direction;

wherein t is ₁ ＜t ₂₁ ＜t ₂₂ 。

4. A method according to any one of claims 1 to 3, wherein the outdoor heat exchanger further comprises:

the second liquid storage tank is arranged among the heat exchange passages and is arranged on a heat exchange passage different from the first liquid storage tank, the second liquid storage tank is communicated with the first liquid storage tank through a second liquid pipe, the second liquid pipe is provided with a second control valve,

in the method for preventing liquid impact of air conditioner, when the surface temperature T _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ When it is, further comprising:

and controlling the second control valve to be opened so that the refrigerant stored in the second liquid storage tank flows into the first liquid storage tank.

5. The method according to claim 4, wherein in the method for preventing liquid impact of an air conditioner, when the surface temperature T _wo Not less than a first preset temperature T _w1 Is greater than or equal to a second preset time period t ₂ When it is, further comprising:

and controlling the second control valve to be closed.

6. The method according to claim 5, wherein in the method for preventing liquid impact of an air conditioner, when the surface temperature T _wo Not less than a first preset temperature T _w1 The duration of the time period is greater than or equal to the first sub-preset time period t ₂₁ When it is, further comprising:

and controlling the second control valve to be closed.

7. The method of claim 6, wherein the outdoor heat exchanger is provided with a first refrigerant inlet and a second refrigerant inlet, the outdoor heat exchanger further comprising:

the refrigerant pipes form a first heat exchange passage, a second heat exchange passage and a third heat exchange passage;

the gas collecting tube is communicated with the first refrigerant inlet and outlet and is communicated with the first end of the first heat exchange passage;

a first shunt element communicated with the gas collecting pipe through a first bypass pipeline and communicated with a first end of the third heat exchange channel; the first bypass pipeline is provided with a first valve;

a second flow dividing element in communication with a second end of the second heat exchange path;

a third flow dividing element which is communicated with the second end of the third heat exchange passage, is communicated with the second flow dividing element through a second bypass pipeline, and is communicated with the second refrigerant inlet and outlet through a supercooling section passage; the second bypass pipeline is provided with a second valve;

wherein the first liquid storage tank is also communicated with the first end of the second heat exchange passage and the first flow dividing element; the second liquid storage tank is also communicated with the second end of the first heat exchange passage and the second flow dividing element.

8. A device for preventing liquid impact of an air conditioner is characterized in that,

the outdoor heat exchanger of the air conditioner includes:

a plurality of heat exchange passages;

the device for preventing liquid impact of an air conditioner comprises:

an acquisition module configured to acquire a surface temperature T of the outdoor heat exchanger when the air conditioner is in a defrosting mode and the defrosting mode is not finished _wo ；

A control module configured to control the temperature T of the surface _wo Not less than a first preset temperature T _w1 And the duration is longer than or equal to the first preset duration t ₁ And when the first control valve is controlled to be opened, the refrigerant stored in the first liquid storage tank flows into the supercooling section passage.

9. An air conditioner comprising a processor and a memory storing program instructions, wherein the processor is configured, when executing the program instructions, to perform the method for liquid impact protection for an air conditioner of any one of claims 1 to 7.

10. A storage medium storing program instructions which, when executed, perform the method for protecting an air conditioner from liquid impact of any one of claims 1 to 7.