CN114087744A

CN114087744A - Air conditioner, air conditioner control method and device and readable storage medium

Info

Publication number: CN114087744A
Application number: CN202010746423.3A
Authority: CN
Inventors: 蔡国健; 杜顺开; 王清伟; 吴楠; 张强
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2022-02-25
Anticipated expiration: 2040-07-29
Also published as: CN114087744B

Abstract

The invention discloses an air conditioner, an air conditioner control method, an air conditioner control device and a readable storage medium. The air conditioner comprises at least two indoor heat exchangers, a flash evaporator, an outdoor heat exchanger, a compressor and a refrigerant flow direction control module, wherein a second port of the indoor first heat exchanger is connected with a first refrigerant port of the flash evaporator, and a fourth port of the indoor second heat exchanger is connected with a second refrigerant port of the flash evaporator; a sixth port of the outdoor heat exchanger is connected with a third refrigerant port of the flash evaporator; the return air port and the exhaust port of the compressor are both connected with the flow direction control module, the first port of the indoor first heat exchanger is connected with the refrigerant flow direction control module through a first pipeline, the third port of the indoor second heat exchanger is connected with the refrigerant flow direction control module through a second pipeline, and the fifth port of the outdoor heat exchanger is connected with the refrigerant flow direction control module through a third pipeline. The invention aims to improve the heat exchange efficiency of the three-pipe air conditioner in different heat exchange scenes.

Description

Air conditioner, air conditioner control method and device and readable storage medium

Technical Field

The present invention relates to the field of air conditioning technologies, and in particular, to an air conditioner, an air conditioner control method, an air conditioner control device, and a readable storage medium.

Background

With the development of science and technology, the living standard of people is improved, the air conditioner is widely applied, the use requirement of people on the air conditioner is higher and higher, and the performance of the air conditioner is continuously optimized. The three-pipe air conditioner is produced at the same time and can be applied to different heat exchange scenes.

However, the existing three-pipe air conditioner has many heat exchange scenes, the refrigerant flowing between the indoor and outdoor heat exchangers is easily influenced by scene factors, and the gas-liquid state of the refrigerant flowing into the heat exchangers meets the requirements of the heat exchange scenes, so that the heat exchange efficiency of the air conditioner is low.

Disclosure of Invention

The invention mainly aims to provide an air conditioner, aiming at improving the heat exchange efficiency of a three-pipe air conditioner when the air conditioner is applied in different heat exchange scenes.

To achieve the above object, the present invention provides an air conditioner including:

the indoor heat exchanger comprises at least two indoor heat exchangers, wherein each indoor heat exchanger comprises a first heat exchanger and a second heat exchanger, the first heat exchanger is provided with a first port and a second port, and the second heat exchanger is provided with a third port and a fourth port;

the flash evaporator is provided with a first refrigerant port, a second refrigerant port and a third refrigerant port, the second port is connected with the first refrigerant port, and the fourth port is connected with the second refrigerant port;

the outdoor heat exchanger is provided with a fifth port and a sixth port, and the sixth port is connected with the third refrigerant port;

a compressor having a return air port and an exhaust port; and

the refrigerant flow direction control module, the gas return port with the gas vent all with flow direction control module connects, first port through first pipeline with refrigerant flow direction control module connects, the third port through the second pipeline with refrigerant flow direction control module connects, the fifth port through the third pipeline with refrigerant flow direction control module connects, refrigerant flow direction control module is used for controlling the flow direction of refrigerant in the first pipeline, the second pipeline with the third pipeline.

Optionally, the air conditioner further includes a first throttling device, and the first throttling device is disposed between the second port of the first heat exchanger and the first refrigerant port of the flash evaporator.

Optionally, the air conditioner further includes a second throttling device and a bypass pipeline, the second throttling device is disposed in the bypass pipeline, the flash evaporator further includes a fourth refrigerant port, and a connecting pipeline between the third refrigerant port of the flash evaporator and the sixth port of the outdoor heat exchanger is provided with a confluence portion;

one end of the bypass pipeline is connected with a fourth refrigerant port of the flash evaporator, and the other end of the bypass pipeline is connected with the confluence part.

Optionally, the air conditioner further includes a third throttling device disposed between the confluence portion and a sixth port of the outdoor heat exchanger.

Optionally, the compressor comprises a first compression cylinder and a second compression cylinder, the return port of the compressor comprises a first return port and a second return port, the inlet of the first compression cylinder is communicated with the first return port of the compressor, the inlet of the second compression cylinder is communicated with the second return port of the compressor, and the outlet of the first compression cylinder and the outlet of the second compression cylinder are both communicated with the outlet of the compressor.

Optionally, the refrigerant flow direction control module includes:

the first four-way valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, an exhaust port of the compressor is connected with the first valve port of the first four-way valve, a second return air port of the compressor is connected with the second valve port of the first four-way valve, one end of a third pipeline of the compressor is connected with the third valve port of the first four-way valve, the other end of the third pipeline is connected with a fifth port of the outdoor heat exchanger, and a third port of the second heat exchanger is connected with the fourth valve port of the first four-way valve; the first four-way valve is used for controlling the flow direction of refrigerants in the second pipeline and the third pipeline;

a capillary tube; and

the second four-way valve is provided with a first interface, a second interface, a third interface and a fourth interface, one end of the first pipeline is connected with the first interface, the other end of the first pipeline is connected with the first interface, the second interface is connected with the exhaust port, the first air return port is connected with the third interface, one end of the capillary tube is connected with the fourth interface, the other end of the capillary tube is connected with the first air return port, and the refrigerant flow direction control submodule is used for controlling the flow direction of a refrigerant in the first pipeline.

Optionally, the refrigerant flow direction control module further includes an electromagnetic valve, one end of the electromagnetic valve is connected to the first return air port of the compressor, the other end of the electromagnetic valve is connected to the second return air port of the compressor, and the refrigerant flow direction control module is further configured to regulate the flow of the refrigerant between the first return air port and the second return air port.

In addition, in order to achieve the above object, the present application also proposes an air conditioner control method, based on the air conditioner as described in any one of the above, comprising the steps of:

acquiring a target heat exchange state of the indoor heat exchanger;

determining the operation parameters of the refrigerant flow direction control module according to the target heat exchange state;

and controlling the refrigerant flow direction control module to operate according to the determined operation parameters so that the refrigerant flows through the flash evaporator, the indoor heat exchanger and the outdoor heat exchanger according to the refrigerant flow direction corresponding to the target heat exchange state.

Optionally, when the refrigerant flow direction control module includes a first four-way valve, a solenoid valve and a second four-way valve, and the compressor of the air conditioner includes a first compression cylinder and a second compression cylinder, the step of determining the operating parameter of the refrigerant flow direction control module according to the target heat exchange state includes:

when the target heat exchange state is a first heat exchange state, setting the valve position of the first four-way valve as a first valve position and the closing state of the electromagnetic valve, and setting the valve position of the second four-way valve as a second valve position as the operation parameter; the first heat exchange state is a state that both a first heat exchanger and a second heat exchanger of the air conditioner are evaporators, and the refrigerant flowing out of the first heat exchanger and the second heat exchanger flows into the outdoor heat exchanger after flowing through the flash evaporator;

when the target heat exchange state is a second heat exchange state, taking a valve position of the first four-way valve as a third valve position, an opening state of the electromagnetic valve and a valve position of the second four-way valve as a fourth valve position as the operation parameters, wherein the second heat exchange state is a state that both a first heat exchanger and a second heat exchanger of the air conditioner are condensers, and a refrigerant flow direction corresponding to the second heat exchange state is that a refrigerant flowing out of the outdoor heat exchanger flows into the first heat exchanger and the second heat exchanger respectively after flowing through a flash evaporator;

the first valve port of the first four-way valve is communicated with the third valve port, and the second valve port of the first four-way valve is communicated with the fourth valve port of the first four-way valve; the third valve position is a valve position in which the first valve port and the fourth valve port in the first four-way valve are communicated, and the second valve port and the third valve port are communicated; the second valve position is a valve position in which a first interface and a third interface in the second four-way valve are communicated and a second interface and a fourth interface are communicated, and the fourth valve position is a valve position in which the first interface and the second interface in the second four-way valve are communicated and the third interface and the fourth interface are communicated.

Optionally, when the air conditioner further includes a first throttling device and the first throttling device is an electronic expansion valve, after the step of controlling the refrigerant flow direction control module to operate according to the determined operation parameter, the air conditioner further includes:

when the target heat exchange state is the first heat exchange state, acquiring indoor environment temperature and indoor environment humidity;

and under the condition that the indoor environment temperature is less than or equal to the set temperature and the indoor environment humidity is greater than or equal to the set humidity, when the temperature of a coil of the first heat exchanger is less than or equal to the characteristic temperature corresponding to the indoor environment temperature, controlling the first throttling device to increase the opening.

Optionally, when the air conditioner further includes a second throttling device, and the second throttling device is an electronic expansion valve, after the step of obtaining the indoor ambient temperature and the indoor ambient humidity, the method further includes:

under the condition that the indoor environment temperature is less than or equal to the set temperature and the indoor environment humidity is greater than or equal to the set humidity, acquiring the coil temperature of a second heat exchanger and the dew point temperature of air;

and controlling the second throttling device to reduce the opening degree according to the coil temperature and the dew point temperature of the second heat exchanger.

Optionally, the step of controlling the second throttling device to reduce the opening degree according to the coil temperature and the dew point temperature of the second heat exchanger comprises:

when the temperature of the coil of the second heat exchanger is greater than or equal to the dew point temperature, controlling the second throttling device to reduce the opening degree according to a first adjustment amplitude;

when the temperature of the coil of the second heat exchanger is lower than the dew point temperature, controlling the second throttling device to reduce the opening degree according to a second adjustment amplitude;

wherein the first adjustment magnitude is greater than the second adjustment magnitude.

Further, in order to achieve the above object, the present application also proposes an air conditioning control device including: the air conditioner control method comprises a memory, a processor and an air conditioner control program stored on the memory and capable of running on the processor, wherein the air conditioner control program realizes the steps of the air conditioner control method according to any one of the above items when being executed by the processor.

Further, in order to achieve the above object, the present application also proposes a readable storage medium having stored thereon an air conditioning control program that, when executed by a processor, implements the steps of the air conditioning control method as recited in any one of the above.

The invention provides an air conditioner which comprises at least two indoor heat exchangers, a compressor, an outdoor heat exchanger and a refrigerant flow direction control module, wherein a return air port and an exhaust port of the compressor are both connected with the refrigerant flow direction control module, the air conditioner also comprises a flash evaporator, the at least two indoor heat exchangers are connected with the outdoor heat exchanger through the flash evaporator and then are connected with the refrigerant flow direction control module through three pipelines, namely a first pipeline, a second pipeline and a third pipeline, and a three-pipe air conditioner applicable to different heat exchange scenes is formed. Due to the arrangement of the flash evaporator, the supercooling degree between the indoor heat exchanger and the outdoor heat exchanger in the three-pipe air conditioner can be further improved, so that the sufficient supercooling degree between the indoor heat exchanger and the outdoor heat exchanger ensures the heat exchange efficiency of the system no matter how the heat exchange scene of the air conditioner changes, and the effective improvement of the heat exchange efficiency of the three-pipe air conditioner in different heat exchange scenes is realized.

Drawings

Fig. 1 is a schematic diagram illustrating a refrigerant pipeline connection manner of an air conditioner and a refrigerant flow direction thereof in a second heat exchange state of an indoor heat exchanger according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a refrigerant pipeline connection mode of an air conditioner and a refrigerant flow direction of the air conditioner in a first heat exchange state of an indoor heat exchanger according to an embodiment of the invention;

FIG. 3 is a schematic diagram of a hardware structure involved in the operation of the air conditioning control device according to the embodiment of the present invention;

FIG. 4 is a flowchart illustrating an embodiment of an air conditioning control method according to the present invention;

FIG. 5 is a schematic flow chart illustrating an air conditioning control method according to another embodiment of the present invention;

fig. 6 is a flowchart illustrating an air conditioner control method according to another embodiment of the present invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides an air conditioner.

In this embodiment, referring to fig. 1 and 2, the air conditioner specifically includes at least two indoor heat exchangers 1, a flash evaporator 2, an outdoor heat exchanger 3, a compressor 4, and a refrigerant flow direction control module 5.

The at least two indoor heat exchangers 1 include a first heat exchanger 11 and a second heat exchanger 12. In the present embodiment, the number of the indoor heat exchangers 1 is specifically two. In other embodiments, the number of the indoor heat exchangers 1 can also be set to 3, 4 or more according to actual needs. The first heat exchanger 11 has a first port 111 and a second port 112, the second heat exchanger 12 has a third port 121 and a fourth port 122, and the first port 111, the second port 112, the third port 121, and the fourth port 122 are all refrigerant inlets and outlets.

The flash evaporator 2 is provided with a first refrigerant port 21, a second refrigerant port 22, and a third refrigerant port 23, which are refrigerant inlet and outlet ports. After entering the flash evaporator 2, the refrigerant with gas-liquid two phases is vaporized rapidly to realize gas-liquid separation. The outdoor heat exchanger 3 is provided with a fifth port 31 and a sixth port 32, and is connected to the third refrigerant port 23 of the flash evaporator 2 through the sixth port 32. The compressor 4 is provided with a return air port 401 and an exhaust port 402, a high-temperature and high-pressure refrigerant flows out of the compressor 4 through the exhaust port 402 to start refrigerant circulation, and a low-temperature and low-pressure refrigerant after circulation flows back to the compressor 4 from the return air port 401 to be re-compressed into the high-temperature and high-pressure refrigerant.

The air return port 401 and the air outlet 402 are both connected to the flow direction control module, the first port 111 is connected to the refrigerant flow direction control module 5 through a first pipeline 01a, the third port 121 is connected to the refrigerant flow direction control module 5 through a second pipeline 01b, the fifth port 31 is connected to the refrigerant flow direction control module 5 through a third pipeline 01c, and the refrigerant flow direction control module 5 is configured to control the flow direction of the refrigerant in the first pipeline 01a, the second pipeline 01b, and the third pipeline 01 c.

The first pipeline 01a, the second pipeline 01b and the third pipeline 01c can be switched in different flow directions through the refrigerant flow direction control module 5, so that the refrigerants in the indoor heat exchanger 1 and the outdoor heat exchanger 3 have different flow directions, and the air conditioning system can adopt different refrigerant circulation modes according to different heat exchange states. When the refrigerant in the first pipeline 01a flows in the first flow direction, the refrigerant in the first heat exchanger 11 flows from the first port 111 to the second port 112, and when the refrigerant in the first pipeline 01a flows in the second flow direction, the refrigerant in the first heat exchanger 11 flows from the second port 112 to the first port 111; when the refrigerant in the second pipeline 01b flows in the third flow direction, the refrigerant in the second heat exchanger 12 flows from the third port 121 to the fourth port 122, and when the refrigerant in the second pipeline 01b flows in the fourth flow direction, the refrigerant in the second heat exchanger 12 flows from the fourth port 122 to the third port 121; when the refrigerant in the third pipeline 01c has the fifth flow direction, the refrigerant in the exterior heat exchanger 3 may flow from the sixth port 32 to the fifth port 31, and when the refrigerant in the third pipeline 01c has the sixth flow direction, the refrigerant in the exterior heat exchanger 3 may flow from the fifth port 31 to the sixth port 32. Therefore, the refrigerant flowing from the discharge port 402 of the compressor 4 can flow back to the return port 401 in different flow directions in the first pipeline 01a, the second pipeline 01b and the third pipeline 01c based on different heat exchange requirements due to the regulation and control function of the refrigerant flow direction control module 5.

Referring to fig. 1, when the refrigerant flow direction control module 5 is in the first position, the refrigerant in the first pipeline 01a is in the first flow direction, the refrigerant in the second pipeline 01b is in the third flow direction, and the refrigerant in the third pipeline 01c is in the fifth flow direction, the refrigerant flowing out of the exhaust port 402 of the compressor 4 respectively enters the first heat exchanger 11 and the second heat exchanger 12, the refrigerants flowing out of the first heat exchanger 11 and the second heat exchanger 12 both enter the flash evaporator 2 for supercooling, the supercooled refrigerant flows into the outdoor heat exchanger 3, the refrigerant flowing out of the outdoor heat exchanger 3 can flow back to the return air port 401 of the compressor 4, and at this time, both the first heat exchanger 11 and the second heat exchanger 12 are condensers. Referring to fig. 2, when the refrigerant flow direction control module 5 is in the second position, the refrigerant flow direction in the first pipeline 01a is the second flow direction, the refrigerant flow direction in the second pipeline 01b is the fourth flow direction, and the refrigerant flow direction in the third pipeline 01c is the sixth flow direction, the refrigerant flowing out of the exhaust port 402 of the compressor 4 flows into the outdoor heat exchanger 3, the refrigerant flowing out of the outdoor heat exchanger 3 is subcooled by the flash evaporator 2 and then flows into the first heat exchanger 11 and the second heat exchanger 12, at this time, the first heat exchanger 11 and the second heat exchanger 12 are both evaporators, and the outdoor heat exchanger 3 is a condenser. When the refrigerant flow direction control module 5 is in the third position, the refrigerant in the first pipeline 01a is in the first flow direction, the refrigerant in the second pipeline 01b is in the fourth flow direction, and the refrigerant in the third pipeline 01c is in the sixth flow direction, the refrigerant flowing out of the exhaust port 402 of the compressor 4 respectively flows into the first heat exchanger 11 and the outdoor heat exchanger 3, the refrigerant flowing out of the first heat exchanger 11 and the refrigerant flowing out of the outdoor heat exchanger 3 both enter the flash evaporator 2 for supercooling, the supercooled refrigerant flows into the second heat exchanger 12, the refrigerant flowing out of the second heat exchanger 12 can flow back to the return air port 401 of the compressor 4, at this time, the outdoor heat exchanger 3 and the first heat exchanger 11 are both condensers, and the second heat exchanger 12 is an evaporator. Therefore, when the refrigerant flow direction control module 5 is arranged at different positions, the refrigerants in the first pipeline 01a, the second pipeline 01b and the third pipeline 01c have different flow directions, so that the indoor heat exchanger 1 and the outdoor heat exchanger 3 have different heat exchange states, and the air conditioner can be applied to different heat exchange scenes, wherein the whole supercooling degree of the system can be improved when the system is applied in any heat exchange scene due to the supercooling effect of the flash evaporator 2, the whole heat exchange quantity of the system is improved, and the whole heat exchange efficiency of the air conditioner is improved.

Specifically, the refrigerant in the flash evaporator 2 has two states of a liquid phase and a gas phase, and based on the difference in density of the gas phase and the liquid phase, a gas phase region is formed above and a liquid phase region is formed below the inside of the flash evaporator 2. Specifically, in this embodiment, the first refrigerant port 21 is communicated with the gas phase region, the second refrigerant port 22 is communicated with the liquid phase region, when the refrigerant flows into the flash evaporator 2 from the outdoor heat exchanger 3 after being subcooled and flows into the first heat exchanger 11 and the second heat exchanger 12 respectively, the gas-phase refrigerant flows into the first heat exchanger 11, the liquid-phase refrigerant flows into the second heat exchanger 12, and the temperature of the coil of the first heat exchanger 11 is higher than that of the coil of the second heat exchanger 12, so that the first heat exchanger 11 and the second heat exchanger 12 are matched to realize the temperature adjustment of the air in the indoor environment. In other embodiments, the first refrigerant port 21 and the second refrigerant port 22 may be set to be both communicated with the liquid phase region according to actual requirements.

It should be noted that the refrigerant flow direction control module 5 may specifically include one or a combination of a plurality of fluid adjusting modules such as an electromagnetic valve 8, a three-way valve, and a four-way valve, and the setting manner is not particularly limited, and only the switching of the refrigerant flow directions in the first pipeline 01a, the second pipeline 01b, and the third pipeline 01c may be ensured.

In the air conditioner provided by the embodiment of the invention, the return air port 401 and the exhaust port 402 of the compressor 4 are both connected with the refrigerant flow direction control module 5, and at least two indoor heat exchangers 1 are connected with the outdoor heat exchanger 3 through the flash evaporator 2 and then connected with the refrigerant flow direction control module 5 through the first pipeline 01a, the second pipeline 01b and the third pipeline 01c, so that the three-pipe air conditioner applicable to different heat exchange scenes is formed. Due to the arrangement of the flash evaporator 2, the supercooling degree between the indoor heat exchanger and the outdoor heat exchanger in the three-pipe air conditioner can be further improved, so that no matter how the heat exchange scene of the air conditioner changes, the indoor heat exchanger and the outdoor heat exchanger have enough supercooling degree to ensure the heat exchange efficiency of the system, and the heat exchange efficiency of the three-pipe air conditioner is effectively improved when the three-pipe air conditioner is applied in different heat exchange scenes.

Further, referring to fig. 1 and 2, the air conditioner further includes a first throttling device 61, and the first throttling device 61 is disposed between the second port 112 of the first heat exchanger 11 and the first refrigerant port 21 of the flash evaporator 2. The first throttling device 61 may be used to adjust the amount of the refrigerant in the first heat exchanger 11, so as to adjust the heat exchange temperature of the refrigerant in the first heat exchanger 11 according to the heat exchange requirements of different heat exchange scenes.

Further, referring to fig. 1 and 2, the air conditioner further includes a second throttling device 62 and a bypass line 7, the second throttling device 62 is disposed on the bypass line 7, and the flash evaporator 2 may further include a fourth refrigerant port 24 in addition to the three refrigerant ports. A connection pipe between the third refrigerant port 23 of the flash evaporator 2 and the sixth port 32 of the outdoor heat exchanger 3 has a confluence portion 02, one end of the bypass pipe 7 is connected to the fourth refrigerant port 24 of the flash evaporator 2, and the other end of the bypass pipe 7 is connected to the confluence portion 02. The fourth refrigerant port 24 may be specifically connected to the liquid phase region in the flash evaporator 2. The second throttling device 62 is specifically used for adjusting the proportion of gas phase and liquid phase in the flash evaporator 2 so as to adapt to different heat exchange scene requirements to adjust the supercooling effect of the flash evaporator 2, thereby improving the energy efficiency of the system and simultaneously meeting different heat exchange requirements. Under the coordination regulation and control action of the first throttling device 61 and the second throttling device 62, the first heat exchanger 11 and the second heat exchanger 12 can have different heat exchange temperature combinations, and indoor air can reach different temperatures after sequentially flowing through the first heat exchanger 11 and the second heat exchanger 12, so that the regulation and control of different outlet air temperatures of the air conditioner are realized.

Further, referring to fig. 1 and 2, the air conditioner further includes a third throttling device 63, and the third throttling device 63 is disposed between the confluence portion 02 and the sixth port 32 of the outdoor heat exchanger 3. The third throttling device 63 can throttle and reduce the pressure of the refrigerant flowing into the outdoor heat exchanger 3 from the flash evaporator 2 or flowing to the flash evaporator 2 from the outdoor heat exchanger 3, so as to ensure the normal heat exchange of the evaporator in the system.

Further, referring to fig. 1 and 2, the compressor 4 includes a first compression cylinder 41 and a second compression cylinder 42, the return port 401 of the compressor 4 includes a first return port 401a and a second return port 401b, the inlet of the first compression cylinder 41 is communicated with the first return port 401a of the compressor 4, the inlet of the second compression cylinder 42 is communicated with the second return port 401b of the compressor 4, and the outlet of the first compression cylinder 41 and the outlet of the second compression cylinder 42 are communicated with the exhaust port 402 of the compressor 4. Through the double-cylinder setting, the refrigerant that flows back to compressor 4 can independently compress through different compression cylinders respectively, realizes system heat exchange efficiency's improvement.

Further, referring to fig. 1 and 2, the refrigerant flow direction control module 5 further includes an electromagnetic valve 8, one end of the electromagnetic valve 8 is connected to the first air return port 401a of the compressor 4, the other end of the electromagnetic valve 8 is connected to the second air return port 401b of the compressor 4, and the refrigerant flow direction control module 5 is further configured to regulate the flow of the refrigerant between the first air return port 401a and the second air return port 401 b. The electromagnetic valve 8 can be suitable for being opened or closed in different heat exchange scenes, so that the capacity of the compressor can be adjusted, and the heat exchange energy efficiency of the air conditioner is improved. When the electromagnetic valve 8 is opened, the compressor 4 adopts two compression cylinders to compress the refrigerant at the same time, and when the electromagnetic valve 8 is closed, the compressor 4 adopts two compression cylinders to respectively and independently compress the refrigerant or only uses one compression cylinder to compress the refrigerant. For example, if the first compression cylinder 41 has a volume of V1 and the second compression cylinder 42 has a volume of V2, the refrigerant can be compressed by using V1, V2, or V1+ V2 according to different heat exchange scenarios. By the mode, the compression capacity of the compressor 4 can be adapted to the requirements of different heat exchange scenes, and the heat exchange efficiency of the air conditioner is improved. In particular, in the present embodiment, the first compression cylinder 41 has a different volume than the second compression cylinder 42. Specifically, the volume of the first compression cylinder 41 is larger than that of the second compression cylinder 42, and meanwhile, the heat exchange area of the first heat exchanger 11 is larger than that of the second heat exchanger 12, so that the suction volume of the compressor 4 can be matched with the heat exchange area, and the heat exchange efficiency of the air conditioning system is further improved.

Further, referring to fig. 1 and 2, the refrigerant flow direction control module 5 in the present embodiment includes a first four-way valve 51, a capillary tube 52, and a second four-way valve 53. The first four-way valve 51 is provided with a first valve port 511, a second valve port 512, a third valve port 513 and a fourth valve port 514, the exhaust port 402 of the compressor 4 is connected with the first valve port 511 of the first four-way valve 51, the second return air port 401b of the compressor 4 is connected with the second valve port 512 of the first four-way valve 51, one end of a third pipeline 01c of the compressor 4 is connected with the third valve port 513 of the first four-way valve 51, the other end of the third pipeline 01c is connected with the fifth port 31 of the outdoor heat exchanger 3, and the third port 121 of the second heat exchanger 12 is connected with the fourth valve port 514 of the first four-way valve 51; the first four-way valve 51 is used for controlling the flow direction of the refrigerant in the second pipeline 01b and the third pipeline 01 c. The second four-way valve 53 is provided with a first port 531, a second port 532, a third port 533 and a fourth port 534, one end of the first pipeline 01a is connected to the first port 111, the other end of the first pipeline 01a is connected to the first port 531, the second port 532 is connected to the exhaust port 402, the first return port 401a is connected to the third port 533, one end of the capillary tube 52 is connected to the fourth port 534, the other end of the capillary tube 52 is connected to the first return port 401a, and the refrigerant flow direction control submodule is configured to control a flow direction of refrigerant in the first pipeline 01 a. The first four-way valve 51 has a first valve position and a third valve position, the first valve position is a valve position where the first port 511 and the third port 513 of the first four-way valve 51 are communicated, and the second port 512 and the fourth port 514 are communicated, at this time, the flow direction of the refrigerant in the third pipeline 01c is a sixth flow direction, and the flow direction of the refrigerant in the second pipeline 01b is a fourth flow direction; the third valve position is a valve position where the first port 511 and the fourth port 514 of the first four-way valve 51 are communicated with each other, and the second port 512 and the third port 513 are communicated with each other, and at this time, the flow direction of the refrigerant in the third pipeline 01c is the fifth flow direction, and the flow direction of the refrigerant in the second pipeline 01b is the third flow direction. The second four-way valve 53 has a second valve position and a fourth valve position, the second valve position is a valve position where the first port 531 and the third port 533 in the second four-way valve 53 are communicated, and the second port 532 and the fourth port 534 are communicated, the flow direction of the refrigerant in the first pipeline 01a is the second flow direction, the fourth valve position is a valve position where the first port 531 and the second port 532 in the second four-way valve 53 are communicated, and the third port 533 and the fourth port 534 are communicated, and the flow direction of the refrigerant in the first pipeline 01a is the first flow direction. Wherein, the capillary tube 52 is arranged to make the refrigerant flowing out from the exhaust port 402 of the compressor 4 not flow into the second four-way valve 53 when the second four-way valve 53 is at the second valve position; when the second four-way valve 53 is at the fourth valve position and the electromagnetic valve 8 is opened, the refrigerant flowing back to the compressor 4 is not shunted to the second four-way valve 53, thereby ensuring the normal circulation of the refrigerant of the system. Through the matching arrangement of the first four-way valve 51, the capillary tube 52 and the second four-way valve 53, the air conditioner can adapt to different heat exchange scenes to switch the flow direction of the refrigerant in the first pipeline 01a, the second pipeline 01b and the third pipeline 01 c.

In the present embodiment, the first throttle device 61, the second throttle device 62, and the third throttle device 63 are all electronic expansion valves. In other embodiments, the first throttling device 61, the second throttling device 62 and the third throttling device 63 can be set as other types of throttling components such as a throttling valve according to actual requirements.

Further, based on the air conditioner, the embodiment of the invention also provides an air conditioner control device, which can be applied to regulation and control of the air conditioner. The air conditioner control device can be arranged in the air conditioner or independently arranged.

In an embodiment of the present invention, referring to fig. 3, an air conditioning control apparatus includes: a processor 1001 (e.g., a CPU), a memory 1002, a temperature sensor 1003, a humidity sensor 1004, a timer 1005, and the like. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.

The temperature sensor 1003 may include a first sensor and a second sensor, and the first sensor may be disposed at a return air inlet of the air conditioner or in an active space of the air conditioner, so as to detect an indoor ambient temperature; a second sensor may be provided on the coil of the first heat exchanger 11 and/or the second heat exchanger 12 for detecting the coil temperature of the first heat exchanger 11 and/or the second heat exchanger 12. The humidity sensor 1004 may be disposed in the air conditioner return air inlet or the active space of the air conditioner for detecting the indoor environment humidity. The timer 1005 is specifically used for counting time parameters related to air conditioner control.

The processor 1001 is connected to the memory 1002, the temperature sensor 1003, the humidity sensor 1004, and the timer 1005. The processor 1001 may be used to acquire data collected in the temperature sensor 1003, the humidity sensor 1004, and the timer 1005.

Those skilled in the art will appreciate that the device configuration shown in fig. 3 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The processor 1001 is connected to the refrigerant flow direction control module 5, the first throttle device 61, the second throttle device 62, and the third throttle device 63 in the air conditioner.

As shown in fig. 3, the memory 1002, which is a readable storage medium, may include an air conditioner control program therein. In the apparatus shown in fig. 3, the processor 1001 may be configured to call an air-conditioning control program stored in the memory 1002 and perform operations of the steps related to the air-conditioning control method in the following embodiments.

The embodiment of the invention also provides an air conditioner control method which is applied to control the air conditioner.

Referring to fig. 4, an embodiment of an air conditioning control method according to the present application is provided. In this embodiment, the air conditioner control method includes:

step S10, acquiring a target heat exchange state of the indoor heat exchanger 1;

the heat exchange state of the indoor heat exchanger 1 may specifically include a condensation state or an evaporation state. The indoor heat exchanger 1 may have different target heat exchange states based on different heat exchange requirements. The target heat exchange state can be determined by acquiring user setting parameters (such as an operation mode set by a user, a set temperature set by the user and the like), and can also be determined by acquiring parameters related to the current operation state of the air conditioner (such as indoor and outdoor environmental parameters, the temperature of an indoor and outdoor heat exchanger, the air pressure parameter of system operation and the like). For example, when the operation mode set by the user is cooling or comfortable dehumidification, or when the system monitors that the indoor ambient humidity is higher than the set humidity and the temperature of the outdoor heat exchanger 3 is lower than the frosting temperature, the first heat exchange state corresponding to both the first heat exchanger 11 and the second heat exchanger 12 can be used as the target heat exchange state. If the operation mode set by the user is heating or sterilization, or if the system needs to enter defrosting operation in the cleaning mode, the second heat exchange state corresponding to both the first heat exchanger 11 and the second heat exchanger 12 can be used as the target heat exchange state. When the operation mode set by the user is reheat dehumidification or when the system monitors that the indoor environment humidity is higher than a set value and the user set temperature is higher than a set temperature, the third heat exchange state in which the first heat exchanger 11 is a condenser and the second heat exchanger 12 is an evaporator can be used as the target heat exchange state.

Step S20, determining an operation parameter of the refrigerant flow direction control module 5 according to the target heat exchange state;

the operation parameter is specifically a target parameter for operating the refrigerant flow direction control module 5 when each of the at least two indoor heat exchangers 1 is matched with a target heat exchange state. Different target heat exchange states correspond to different operation parameters of the refrigerant flow direction control module 5. The refrigerant flow directions in the first pipeline 01a, the second pipeline 01b and the third pipeline 01c required by different target heat exchange states are different, and the corresponding operating parameters of the refrigerant flow direction control module 5 are different. Specifically, the operation parameters of the refrigerant flow direction control module 5 corresponding to each target heat exchange state may be different according to different types and positions of components arranged in the refrigerant flow direction control module 5, and the operation parameters of the refrigerant flow direction control module 5 corresponding to different target heat exchange states may be determined in advance based on the structure of the refrigerant flow direction control module 5 and the connection manner of the refrigerant flow direction control module in the refrigerant circulation loop.

The operation parameters of the refrigerant flow direction control module 5 may specifically include opening or closing of a sub-component in the refrigerant flow direction control module 5, a position state of a sub-component in the refrigerant flow direction control module 5, and the like. Specifically, when the refrigerant flow direction control module 5 includes an electromagnetic valve, the operation parameter may include opening or closing of the electromagnetic valve; when the refrigerant flow direction control module 5 includes an electronic expansion valve, the operation parameters may include the opening size, opening or closing, and the like of the electronic expansion valve; when the refrigerant flow direction control module 5 includes a multi-way valve (e.g., a four-way valve or a three-way valve), the operation parameter may include a valve position of the multi-way valve. When the refrigerant flow direction control module 5 includes more than one of the fluid control modules, such as an electromagnetic valve, an electronic expansion valve, and a multi-way valve, the operation parameters may include more than one of the above-mentioned operation parameters.

And step S30, controlling the refrigerant flow direction control module 5 to operate according to the determined operation parameters, so that the refrigerant flows through the flash evaporator 2, the indoor heat exchanger 1 and the outdoor heat exchanger 3 according to the refrigerant flow direction corresponding to the target heat exchange state.

And controlling the refrigerant flow direction control module 5 to operate according to the determined operation parameters, wherein the refrigerant flow directions in the first pipeline 01a, the second pipeline 01b and the third pipeline 01c of the air conditioner under the state can enable the indoor heat exchanger 1 to reach a target heat exchange state, and meanwhile, the refrigerant flows from the indoor heat exchanger 1 to the outdoor heat exchanger 3, or the refrigerant can be supercooled by the flash evaporator 2 when flowing from the outdoor heat exchanger 3 to the indoor heat exchanger 1.

In the air conditioner control method provided in this embodiment, the operation parameters of the refrigerant flow direction control module 5 in the air conditioner are adjusted based on the target heat exchange states of different indoor heat exchangers 1 to be achieved, so that when the refrigerant flow direction control module 5 operates according to the determined operation parameters, the refrigerant flow directions in the first pipeline 01a, the second pipeline 01b and the third pipeline 01c of the air conditioner can make the indoor heat exchanger 1 reach a target heat exchange state, in any target heat exchange state, the refrigerant flows through the flash evaporator 2 between the indoor heat exchanger and the outdoor heat exchanger for supercooling and then flows backwards, thereby improving the heat exchange capacity and the energy efficiency of the system, ensuring that the supercooling degree between the indoor heat exchanger and the outdoor heat exchanger is enough to ensure the heat exchange efficiency of the system no matter how the heat exchange scene of the air conditioner is changed, therefore, the heat exchange efficiency of the three-pipe air conditioner is effectively improved when the three-pipe air conditioner is applied to different heat exchange scenes.

Specifically, in the present embodiment, when the refrigerant flow direction control module 5 of the air conditioner in the above-mentioned embodiment includes the first four-way valve 51, the solenoid valve 8 and the second four-way valve 53, and the compressor 4 of the air conditioner includes the first compression cylinder 41 and the second compression cylinder 42, the step S20 includes:

step S21, when the target heat exchange state is a first heat exchange state, setting the valve position of the first four-way valve 51 as a first valve position and the closing state of the electromagnetic valve 8, and setting the valve position of the second four-way valve 53 as a second valve position as the operation parameter; the first heat exchange state is a state that both the first heat exchanger 11 and the second heat exchanger 12 of the air conditioner are evaporators, and the refrigerant flowing direction corresponding to the first heat exchange state is that the refrigerant flowing out of the first heat exchanger 11 and the second heat exchanger 12 flows into the outdoor heat exchanger 3 after flowing through the flash evaporator 2;

step S22, when the target heat exchange state is a second heat exchange state, taking a valve position of the first four-way valve 51 as a third valve position, an open state of the electromagnetic valve 8, and a valve position of the second four-way valve 53 as a fourth valve position as the operation parameters, where the second heat exchange state is a state where both the first heat exchanger 11 and the second heat exchanger 12 of the air conditioner are condensers, and a refrigerant flow direction corresponding to the second heat exchange state is that a refrigerant flowing out of the outdoor heat exchanger 3 flows into the first heat exchanger 11 and the second heat exchanger 12 respectively after flowing through the flash evaporator 2;

the first valve position is a valve position in which the first port 511 and the third port 513 of the first four-way valve 51 are communicated, and the second port 512 and the fourth port 514 are communicated; the third valve position is a valve position in which the first port 511 and the fourth port 514 of the first four-way valve 51 are communicated, and the second port 512 and the third port 513 are communicated; the second valve position is a valve position where the first port 531 and the third port 533 in the second four-way valve 53 are communicated, and the second port 532 and the fourth port 534 are communicated, and the fourth valve position is a valve position where the first port 531 and the second port 532 in the second four-way valve 53 are communicated, and the third port 533 and the fourth port 534 are communicated

Specifically, referring to fig. 2, when the target heat exchange state is the first heat exchange state, and the first four-way valve 51, the solenoid valve 8 and the second four-way valve 53 are controlled to operate according to the determined operation parameters, the refrigerant flow direction in the refrigerant circulation loop of the air conditioner is as shown by an arrow in fig. 2, a high-temperature and high-pressure refrigerant flowing out of an exhaust port 402 of the compressor 4 passes through the first four-way valve 51, enters the outdoor heat exchanger 3 for condensation, and then passes through the third throttling device 63 for throttling and pressure reduction, the depressurized refrigerant enters the flash evaporator 2, the flash evaporator 2 separates the refrigerant into liquid and air pressure, a gaseous refrigerant enters the first heat exchanger 11 for evaporation, a liquid refrigerant enters the second heat exchanger 12 for evaporation, and at this time, both the two indoor heat exchangers 1 are evaporators. The refrigerants flowing out of the two indoor heat exchangers 1 respectively flow through the first four-way valve 51 and the second four-way valve 53 and then flow back to the return air port 401 of the compressor 4, and the supercooling effect of the flash evaporator 2 can improve the overall heat exchange efficiency of the system in the first heat exchange state. The electromagnetic valve 8 is closed, the refrigerant in the first heat exchanger 11 with the large heat exchange area can flow back to the first compression cylinder 41 with the large volume from the first air return port 401a, the refrigerant in the second heat exchanger 12 with the small heat exchange area can flow back to the second compression cylinder 42 with the small volume from the second air return port 401b, and the refrigerant quantity of the system can be reasonably distributed, so that the air suction quantity of the compressor 4 can be matched with the heat exchange area of the heat exchanger, and the further improvement of the heat exchange efficiency of the air conditioner under the condition that the indoor heat exchanger 1 is located in the first heat exchanger 11 is realized. In addition, because the effect of liquid refrigerant evaporation is better than the effect of gaseous refrigerant evaporation, therefore the evaporation temperature of the first heat exchanger 11 is higher than the evaporation temperature of the second heat exchanger 12, when the air conditioner is in refrigeration operation (such as conventional refrigeration or refrigeration dehumidification) and the comfortable air outlet temperature (namely the temperature which is more than or equal to the first temperature threshold value and is less than or equal to the second temperature threshold value) of user demand is realized by double-temperature evaporation, the air temperature which is blown into the room after the air passes through the two evaporators respectively for temperature adjustment is comfortable, the air temperature cannot be too high or too low, and the comfort of the air outlet temperature of the air conditioner is ensured while the air conditioner efficiently exchanges heat with the air in the indoor environment. Here, among them indoor heat exchanger 1 need be one for the condenser, another is the evaporimeter when realizing comfortable air-out in current three-pipe system air conditioner, and adopts two high low temperature evaporimeters to realize comfortable air-out in this embodiment to reduce offsetting of cold volume when condenser is reheat, guarantee the air conditioner to indoor refrigerating output.

Further, referring to fig. 1, when the target heat exchange state is the first heat exchange state, the first four-way valve 51 is controlled according to the determined operation parameters, when the electromagnetic valve 8 and the second four-way valve 53 operate, the refrigerant in the refrigerant circulation loop of the air conditioner flows towards the arrow shown in fig. 1, a part of the high-temperature and high-pressure refrigerant flowing out of the exhaust port 402 of the compressor 4 flows through the first four-way valve 51 to enter the second heat exchanger 12 for condensation, the other part of the high-temperature and high-pressure refrigerant flows through the second four-way valve 53 to enter the first heat exchanger 11 for condensation, the condensed refrigerant enters the flash evaporator 2 for further supercooling, the supercooled refrigerant passes through the third throttling device 63 for throttling and pressure reduction and then enters the outdoor heat exchanger 3, the refrigerant flowing out of the outdoor heat exchanger 3 flows back to the return air port 401 of the compressor 4 after passing through the first four-way valve 51, and the supercooling effect of the flash evaporator 2 can realize the improvement of the overall heat exchange efficiency of the system in the second heat exchange state. The electromagnetic valve 8 is opened, and the returned refrigerant can be distributed to the first compression cylinder 41 and the second compression cylinder 42 for compression, so that the volume of the compressor 4 can adapt to the heat exchange load of the current system, and the heat exchange energy efficiency of the air conditioner is improved.

Further, based on the above embodiments, another embodiment of the air conditioner control method of the present application is provided. In this embodiment, referring to fig. 5, when the air conditioner further includes a first throttle device 61 and the first throttle device 61 is an electronic expansion valve, after step S30, the method further includes:

step S40, when the target heat exchange state is the first heat exchange state, acquiring indoor environment temperature and indoor environment humidity;

the indoor ambient temperature and the indoor ambient humidity can be obtained by acquiring data detected by the return air port 401 of the air conditioner or the temperature sensor and the humidity sensor in the air conditioner active space.

Step S50, when the indoor ambient temperature is less than or equal to the set temperature and the indoor ambient humidity is greater than or equal to the set humidity, and when the coil temperature of the first heat exchanger 11 is less than or equal to the characteristic temperature corresponding to the indoor ambient temperature, the first throttle device 61 is controlled to increase the opening degree.

The specific values of the set temperature and the set humidity can be set according to the comfort requirements of the user. Indoor environment temperature is less than or equal to the settlement temperature, and indoor environment humidity is greater than or equal to the settlement humidity, shows that current indoor environment is in low temperature high humidity state, and the air conditioner air-out can lead to making indoor user's body to feel the temperature lower, and user's travelling comfort is relatively poor, needs further regulation and control in order to avoid air conditioner air-out temperature too low to need dehumidify the room air simultaneously.

The characteristic temperature is specifically determined according to the indoor environment temperature, and the indoor environment temperature may be used as the characteristic temperature, or a temperature value smaller than the indoor environment temperature by a set value may be used as the characteristic temperature. For example, in the present embodiment, a temperature 2 ℃ lower than the current indoor ambient temperature is taken as the characteristic temperature.

In this embodiment, the gaseous refrigerant flows into the first heat exchanger 11 to evaporate, the liquid refrigerant flows into the second heat exchanger 12 to evaporate, the temperature of the coil of the first heat exchanger 11 is higher than that of the coil of the second heat exchanger 12, and the air in the air duct of the air conditioner is dehumidified by the second heat exchanger 12 and then is temperature-adjusted by the first heat exchanger 11 to blow to the indoor environment. Based on this, when the coil temperature of the first heat exchanger 11 is less than or equal to the characteristic temperature, it indicates that the temperature of the high-temperature evaporator is too low, and it is difficult to ensure the comfort of the air-out temperature of the air conditioner, so that the first throttling device 61 is controlled to increase the opening degree, and the flow rate of the refrigerant flowing into the first heat exchanger 11 is increased, so as to increase the coil temperature of the first heat exchanger 11, and to realize the increase of the air-out temperature of the air conditioner. Wherein, the opening degree variation amplitude of the first throttling device 61 required to be adjusted can be determined based on the temperature difference between the coil temperature of the first heat exchanger 11 and the characteristic temperature, and the larger the temperature difference is, the larger the corresponding opening degree variation amplitude is. In other embodiments, the first throttling device 61 may be controlled to increase the opening degree according to the set range, and then the process returns to step S50, so as to gradually adjust the first throttling device 61 to meet the comfort requirement of the outlet air temperature.

In addition, when the air conditioner further comprises a second throttling device 62 and/or a third throttling device 63, the current opening degree of the second throttling device 62 and/or the third throttling device 63 can be obtained, and the target opening degree value of the first throttling device 61 is determined based on the current opening degree of the second throttling device 62 and/or the third throttling device 63 and the temperature difference between the coil temperature and the characteristic temperature, so that the refrigerant flowing into and out of the flash evaporator 2 can be matched with the current temperature requirement through the matched regulation and control of the first throttling device 61, the second throttling device 62 and the third throttling device 63, and the heat exchange energy efficiency of the air conditioner is optimized. Further, the target opening value of the first throttling device 61 can be determined by combining the current opening of the second throttling device 62 and/or the third throttling device 63, the temperature difference between the coil temperature and the characteristic temperature and the deviation amount of the indoor environment humidity and the set humidity, so that the target opening value of the first throttling device 61 can be determined

The indoor environment temperature is higher than the set temperature, or the indoor environment humidity is lower than the set humidity, which indicates that the current temperature and humidity cooperation of the indoor environment does not make the indoor user feel obviously cold, and the opening degree of the first throttling device 61 can be regulated according to other regulation rules or the first throttling device 61 can be controlled to maintain the current opening degree unchanged.

In this embodiment, under indoor heat exchanger 1 was in first heat transfer state, when the coil pipe temperature through at first heat exchanger 11 was on the low side, the aperture increase of the first throttling arrangement 61 of its series connection was controlled to improve first heat exchanger 11's heat transfer temperature, the air-out temperature was crossed lowly when preventing that the air conditioner from passing through second heat exchanger 12 low temperature evaporation dehumidification, guaranteed the travelling comfort of air conditioner air-out.

Further, based on the above embodiment, still another embodiment of the air conditioner control method of the present application is provided. In this embodiment, when the air conditioner further includes the second throttling device 62 and the second throttling device 62 is an electronic expansion valve, referring to fig. 6, after step S40, the air conditioner further includes:

step S60, acquiring the coil temperature of the second heat exchanger 12 and the dew point temperature of the air when the indoor ambient temperature is less than or equal to the set temperature and the indoor ambient humidity is greater than or equal to the set humidity;

in step S70, the opening degree of the second throttling device 62 is controlled to be reduced according to the coil temperature of the second heat exchanger 12 and the dew-point temperature.

The dew point temperature can be calculated according to the current indoor environment temperature and the indoor environment humidity.

In this embodiment, the gaseous refrigerant flows into the first heat exchanger 11 to evaporate, the liquid refrigerant flows into the second heat exchanger 12 to evaporate, the temperature of the coil of the first heat exchanger 11 is higher than that of the coil of the second heat exchanger 12, and the air in the air duct of the air conditioner is dehumidified by heat exchange of the second heat exchanger 12, and then is temperature-adjusted by the first heat exchanger 11 to blow to the indoor environment. Accordingly, the opening degree of the second throttling device 62 is reduced based on the second heat exchanger 12 and the dew-point temperature, so that the temperature of the second heat exchanger 12 is continuously reduced, and the dehumidification effect of the second heat exchanger 12 is improved.

When the coil temperature of the second heat exchanger 12 is greater than or equal to the dew point temperature, it indicates that the water vapor is difficult to condense in the second heat exchanger 12, the dehumidification effect of the second heat exchanger 12 is poor, and the opening degree of the second throttling device 62 can be controlled to be reduced, so that the temperature of the second heat exchanger 12 is less than the dew point temperature. Specifically, the reduced amplitude may be a set amplitude, and may also be determined based on the temperature difference between the coil temperature of the second heat exchanger 12 and the dew point temperature, and the larger the temperature difference, the larger the amplitude of the opening reduction. When the coil temperature of the second heat exchanger 12 is lower than the dew-point temperature, the opening degree of the second expansion device 62 may be controlled to be decreased, or the current opening degree of the second expansion device 62 may be controlled to be maintained.

Specifically, in this embodiment, when the coil temperature of the second heat exchanger 12 is greater than or equal to the dew-point temperature, the second throttling device 62 is controlled to decrease the opening degree according to a first adjustment range; when the coil temperature of the second heat exchanger 12 is lower than the dew-point temperature, controlling the second throttling device 62 to reduce the opening degree according to a second adjustment range; wherein the first adjustment magnitude is greater than the second adjustment magnitude. Based on this, when the water vapor is difficult to condense on the second heat exchanger 12, the opening degree of the second throttling device 62 is greatly reduced, so that the temperature of the coil pipe of the second heat exchanger 12 can be rapidly reduced to be lower than the dew point temperature, and the air conditioner is ensured to have better dehumidification effect; when the water vapor can be condensed on the second heat exchanger 12, the opening degree of the second throttling device 62 can be controlled to be reduced by a small margin, so that the dehumidification effect is further improved and the frosting of the second heat exchanger 12 is avoided.

Further, in order to enable the opening regulation of the second throttling device 62 to meet the dehumidification requirement and simultaneously avoid excessive outlet air temperature, the adjustment range of the opening of the second throttling device 62 can be determined by combining the temperature difference between the indoor environment temperature and the set temperature in addition to the coil temperature and the dew point temperature, the reference value of the range is determined based on the coil temperature and the dew point temperature, when the coil temperature is higher than the dew point temperature, the larger the temperature difference is, the larger the reference value is, the adjustment value corresponding to the reference value is determined based on the temperature difference between the indoor environment temperature and the set temperature, the larger the temperature difference is, the larger the adjustment value is, and the result obtained by reducing the adjustment value on the basis of the reference value is used as the target range of the opening reduction of the second throttling device 62.

The sequence of adjusting the opening degree of the second throttling device 62 in steps S60 and S70 and the sequence of adjusting the opening degree of the first throttling device 61 in steps S40 and S50 in the above embodiments are not particularly limited, and may be performed sequentially or synchronously according to actual needs. Specifically, in this embodiment, in order to reduce indoor ambient humidity while the air conditioner outlet air temperature will not be lower indoor ambient temperature is less than or equal to the set temperature, just under the condition that indoor ambient humidity is greater than or equal to the set humidity, adjust the aperture of second electronic expansion valve based on the coil pipe temperature of second heat exchanger 12 earlier, when reaching the length of setting after the adjustment of second electronic expansion valve, further adjust the aperture of first electronic valve when further based on the coil pipe temperature of first heat exchanger 11 and characteristic temperature.

In addition, an embodiment of the present invention further provides a readable storage medium, where an air conditioning control program is stored, and the air conditioning control program, when executed by a processor, implements the relevant steps of any of the above air conditioning control methods.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An air conditioner, characterized in that the air conditioner comprises:

a compressor having a return air port and an exhaust port; and

2. The air conditioner as claimed in claim 1, further comprising a first throttling device disposed between the second port of the first heat exchanger and the first refrigerant port of the flash evaporator.

3. The air conditioner as claimed in claim 2, wherein the air conditioner further comprises a second throttling device and a bypass pipeline, the second throttling device is arranged on the bypass pipeline, the flash evaporator further comprises a fourth refrigerant port, and a connecting pipeline between the third refrigerant port of the flash evaporator and the sixth port of the outdoor heat exchanger is provided with a confluence part;

4. The air conditioner of claim 3, further comprising a third throttling device disposed between the junction and a sixth port of the outdoor heat exchanger.

5. The air conditioner according to any one of claims 1 to 4, wherein the compressor includes a first compression cylinder and a second compression cylinder, the return port of the compressor includes a first return port and a second return port, the inlet port of the first compression cylinder communicates with the first return port of the compressor, the inlet port of the second compression cylinder communicates with the second return port of the compressor, and the outlet port of the first compression cylinder and the outlet port of the second compression cylinder both communicate with the discharge port of the compressor.

6. The air conditioner as claimed in claim 5, wherein the refrigerant flow direction control module comprises:

a capillary tube; and

7. The air conditioner as claimed in claim 6, wherein the refrigerant flow direction control module further includes an electromagnetic valve, one end of the electromagnetic valve is connected to the first return port of the compressor, the other end of the electromagnetic valve is connected to the second return port of the compressor, and the refrigerant flow direction control module is further configured to regulate a flow of the refrigerant between the first return port and the second return port.

8. An air conditioner control method based on the air conditioner as claimed in any one of claims 1 to 7, characterized by comprising the steps of:

acquiring a target heat exchange state of the indoor heat exchanger;

determining operation parameters of a refrigerant flow direction control module according to the target heat exchange state; and

9. The air conditioner control method as claimed in claim 8, wherein when the refrigerant flow direction control module includes a first four-way valve, a solenoid valve and a second four-way valve, and the compressor of the air conditioner includes a first compression cylinder and a second compression cylinder, the step of determining the operation parameter of the refrigerant flow direction control module according to the target heat exchange state includes:

when the target heat exchange state is a first heat exchange state, setting the valve position of the first four-way valve as a first valve position and the closing state of the electromagnetic valve, and setting the valve position of the second four-way valve as a second valve position as the operation parameter; the first heat exchange state is a state that both a first heat exchanger and a second heat exchanger of the air conditioner are evaporators, and the refrigerant flowing out of the first heat exchanger and the second heat exchanger flows into the outdoor heat exchanger after flowing through the flash evaporator; and

10. The air conditioner control method as claimed in claim 9, wherein when the air conditioner further includes a first throttling device and the first throttling device is an electronic expansion valve, after the step of controlling the operation of the refrigerant flow direction control module according to the determined operation parameters, the method further comprises:

when the target heat exchange state is the first heat exchange state, acquiring indoor environment temperature and indoor environment humidity; and

11. The air conditioning control method according to claim 10, wherein when the air conditioner further includes a second throttling device and the second throttling device is an electronic expansion valve, the step of obtaining the indoor ambient temperature and the indoor ambient humidity further includes, after the step of obtaining the indoor ambient temperature and the indoor ambient humidity:

under the condition that the indoor environment temperature is less than or equal to the set temperature and the indoor environment humidity is greater than or equal to the set humidity, acquiring the coil temperature of a second heat exchanger and the dew point temperature of air; and

12. The air conditioning control method as claimed in claim 11, wherein the step of controlling the second throttling means to reduce the opening degree according to the coil temperature of the second heat exchanger and the dew point temperature comprises:

when the temperature of the coil of the second heat exchanger is greater than or equal to the dew point temperature, controlling the second throttling device to reduce the opening degree according to a first adjustment amplitude; and

13. An air conditioning control device characterized by comprising: a memory, a processor and an air conditioning control program stored on the memory and executable on the processor, the air conditioning control program when executed by the processor implementing the steps of the air conditioning control method of any one of claims 8 to 12.

14. A readable storage medium, characterized in that the readable storage medium has stored thereon an air-conditioning control program which, when executed by a processor, implements the steps of the air-conditioning control method according to any one of claims 8 to 12.