CN112254210A

CN112254210A - Air conditioning unit, control method thereof, air conditioning equipment and constant-temperature and constant-humidity air conditioning system

Info

Publication number: CN112254210A
Application number: CN202011294382.5A
Authority: CN
Inventors: 熊俊峰; 杨智峰; 王磊
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-01-22
Anticipated expiration: 2040-11-18
Also published as: CN112254210B

Abstract

The utility model provides an air conditioning unit and control method, air conditioning equipment and constant temperature and humidity air conditioning system thereof, relates to air conditioning technical field, air conditioning unit includes the indoor set, the indoor set includes: a humidifier; an indoor heat exchanger configured to dissipate heat in a defrosting mode; a gas-liquid separator; and a compressor, an exhaust port of which communicates with the indoor heat exchanger via the humidifier, a suction port of which is configured to communicate with the gas-liquid separator via the humidifier.

Description

Air conditioning unit, control method thereof, air conditioning equipment and constant-temperature and constant-humidity air conditioning system

Technical Field

The disclosure relates to the technical field of air conditioners, in particular to an air conditioning unit, a control method of the air conditioning unit, air conditioning equipment and a constant temperature and humidity air conditioning system.

Background

In order to better ensure the refrigeration effect of the air conditioner, the outdoor heat exchanger of the air conditioner needs to be defrosted. In the related art, in order to avoid large fluctuation of indoor temperature caused by non-heating of the indoor heat exchanger during defrosting, the double-chamber external heat exchanger is adopted for asynchronous defrosting during defrosting, so that the indoor heat exchanger can keep heating.

Disclosure of Invention

The inventor has noticed that the method in the related art has a problem of low temperature and humidity control accuracy. The inventor researches and discovers that during defrosting, because a single outdoor heat exchanger needs to bear the heat load required by heating an indoor heat exchanger and the heat load required by defrosting of the other outdoor heat exchanger, the heat load borne by the single outdoor heat exchanger is larger, and more refrigerants are required. However, the heat absorbed by a single outdoor heat exchanger may not be enough to evaporate all the refrigerant, so that the compressor sucks air and carries liquid, the defrosting time is long, and the temperature and humidity control accuracy is low.

In order to solve the above problem, the embodiments of the present disclosure propose the following solutions.

According to an aspect of the embodiments of the present disclosure, there is provided an air conditioning unit including an indoor unit, the indoor unit including: a humidifier; an indoor heat exchanger configured to dissipate heat in a defrosting mode; a gas-liquid separator; and a compressor, an exhaust port of which communicates with the indoor heat exchanger via the humidifier, a suction port of which is configured to communicate with the gas-liquid separator via the humidifier.

In some embodiments, the defrost mode includes a first defrost mode and a second defrost mode; the air conditioning unit further includes an outdoor unit including: a first outdoor heat exchanger configured to radiate heat in the first defrosting mode and absorb heat in the second defrosting mode; and a second outdoor heat exchanger configured to absorb heat in the first defrosting mode and to dissipate heat in the second defrosting mode.

In some embodiments, the humidifier comprises: a housing filled with a liquid; and a first pipe and a second pipe connected in parallel, which are disposed in the housing and surrounded by the liquid, wherein a discharge port of the compressor communicates with the indoor heat exchanger via the first pipe, and a suction port of the compressor is configured to communicate with the gas-liquid separator via the second pipe.

In some embodiments, the indoor unit further includes a control valve disposed between the suction port of the compressor and the gas-liquid separator, configured to control whether the suction port of the compressor communicates with the gas-liquid separator via the humidifier.

In some embodiments, the control valve comprises: a first control valve provided between the humidifier and one of the gas-liquid separator and the suction port of the compressor; and a second control valve connected in parallel with the first control valve and disposed between the suction port of the compressor and the gas-liquid separator.

In some embodiments, the indoor unit group further includes: a first three-way valve having a first port in communication with the gas-liquid separator, a second port in communication with the humidifier and the first port of the first three-way valve, and a third port in communication with the control valve and the first port of the first three-way valve.

In some embodiments, the indoor unit group further includes: a second three-way valve, a first port of the second three-way valve being in communication with the humidifier, a second port and a third port of the second three-way valve both being in communication with the first port; a third three-way valve, a first port of the third three-way valve being in communication with the gas-liquid separator, a second port and a third port of the third three-way valve both being in communication with the first port; a third control valve; a first four-way valve, a first port of which communicates with the second port of the second three-way valve and with one of a second port and a third port of which the second port communicates with the first outdoor heat exchanger, a third port of which communicates with the indoor heat exchanger via the third control valve, and a fourth port of which communicates with the other of the second port and the third port of the first four-way valve and with the second port of the third three-way valve; a fourth control valve; and a second four-way valve, a first port of which communicates with the third port of the second three-way valve and with one of the second port and the third port of the second four-way valve, a second port of which communicates with the second outdoor heat exchanger, a third port of which communicates with the indoor heat exchanger via the fourth control valve, and a fourth port of which communicates with the other of the second port and the third port of the second four-way valve and with the third port of the third three-way valve.

In some embodiments, the indoor unit further comprises a first stop valve and a second stop valve, the outdoor unit further comprises a third stop valve and a fourth stop valve; a second port of the first four-way valve is communicated with the first outdoor heat exchanger through the first stop valve and the third stop valve in sequence; and a second port of the second four-way valve is communicated with the second outdoor heat exchanger through the second stop valve and the fourth stop valve in sequence.

In some embodiments, the outdoor unit further comprises a liquid storage tank; the air outlet of the compressor is communicated with the first port of the indoor heat exchanger through the humidifier, and the second port of the indoor heat exchanger, the first outdoor heat exchanger and the second outdoor heat exchanger are communicated with the liquid storage tank.

In some embodiments, the indoor unit further comprises a first electronic expansion valve and a fifth stop valve, and the outdoor unit further comprises a sixth stop valve; and the second port of the indoor heat exchanger is communicated with the liquid storage tank through the first electronic expansion valve, the fifth stop valve, the sixth stop valve in sequence.

In some embodiments, the outdoor unit further includes: the second electronic expansion valve is arranged between the liquid storage tank and the first outdoor heat exchanger; and the third electronic expansion valve is arranged between the liquid storage tank and the second outdoor heat exchanger.

In some embodiments, the discharge port of the compressor communicates with the first port of the indoor heat exchanger via the humidifier, the indoor unit further comprising: a fifth control valve; a reheater, a first port of the reheater being in communication with the humidifier via the fifth control valve, a second port of the reheater being in communication with a second port of the indoor heat exchanger; and the indoor fan is arranged to enable return air to sequentially pass through the indoor heat exchanger and the reheater.

According to another aspect of the embodiments of the present disclosure, there is provided a method for controlling an air conditioning unit according to any one of the embodiments, including: controlling a suction port of the compressor to communicate with the gas-liquid separator via the humidifier in at least one of the first and second defrosting modes.

In some embodiments, the method further comprises: and in a cooling mode, controlling the air suction port of the compressor to be communicated with the gas-liquid separator through the humidifier.

In some embodiments, the method further comprises: in the heating mode, the air suction port of the compressor is controlled not to be communicated with the gas-liquid separator through the humidifier.

According to another aspect of the embodiments of the present disclosure, there is provided a control device of an air conditioning unit according to any one of the above embodiments, including: a control module configured to control a suction port of the compressor to communicate with the gas-liquid separator via the humidifier in at least one of the first and second defrosting modes.

According to another aspect of the embodiments of the present disclosure, there is provided an apparatus for controlling an air conditioning unit according to any one of the above embodiments, including: a memory; and a processor coupled to the memory and configured to perform the method of any of the above embodiments based on instructions stored in the memory.

According to still another aspect of the embodiments of the present disclosure, there is provided an air conditioning apparatus including: at least one of the air conditioning unit according to any one of the above embodiments and the control device for an air conditioning unit according to any one of the above embodiments.

According to another aspect of the embodiments of the present disclosure, there is provided a constant temperature and humidity air conditioning system including the air conditioning equipment according to any one of the embodiments.

According to a further aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the method according to any one of the embodiments described above.

In an embodiment of the present disclosure, an exhaust port of the compressor is in communication with the indoor heat exchanger via a humidifier, and a suction port of the compressor is configured to be in communication with the gas-liquid separator via the humidifier. Under such structure, the liquid volume that the compressor was inhaled under the mode of can reducing the defrosting to reduce the time of defrosting, improve the control accuracy of air conditioning unit's humiture.

The technical solution of the present disclosure is further described in detail by the accompanying drawings and examples.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of an air conditioning assembly according to some embodiments of the present disclosure;

fig. 2 illustrates a flow direction of a refrigerant in the first defrosting mode;

fig. 3 illustrates a flow direction of a refrigerant in the second defrosting mode;

fig. 4 is a schematic structural diagram of a control device of an air conditioning unit according to some embodiments of the present disclosure;

fig. 5 is a schematic structural diagram of an air conditioning apparatus according to some embodiments of the present disclosure.

Detailed Description

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

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

FIG. 1 is a schematic diagram of an air conditioning pack configuration according to some embodiments of the present disclosure.

As shown in fig. 1, the air conditioning unit includes at least an indoor unit IU. In some embodiments, the air conditioning unit further includes an outdoor unit OU. In fig. 1, the indoor unit IU and the outdoor unit OU are located on both sides of the dotted line.

Referring to fig. 1, the indoor unit IU includes a humidifier 11, an indoor heat exchanger 12, a gas-liquid separator 13, and a compressor 14.

The indoor heat exchanger 12 is configured to dissipate heat in the defrosting mode. An exhaust port of the compressor 14 communicates with the indoor heat exchanger 12 via the humidifier 11, and a suction port of the compressor 14 is configured to communicate with the gas-liquid separator 13 via the humidifier 11. In other words, the suction port of the compressor 14 can communicate with the gas-liquid separator 13 via the humidifier 11.

It should be understood that the refrigerant gas discharged from the discharge port of the compressor 14 is a high-temperature and high-pressure gas, so that the humidifier 11 can be preheated, thereby increasing the temperature of the liquid in the humidifier 11. Refrigerant gas sucked by a suction port of the compressor 14 is low-temperature low-pressure gas, and superheat degree of the low-temperature low-pressure gas after passing through the humidifier 11 is increased, so that liquid quantity sucked by the compressor 14 in a defrosting mode can be reduced, defrosting time is shortened, and temperature and humidity control precision of the air conditioning unit is improved.

In the above-described embodiment, the discharge port of the compressor 14 communicates with the indoor heat exchanger 12 via the humidifier 11, and the suction port of the compressor 14 is configured to communicate with the gas-liquid separator 13 via the humidifier 11. With the structure, the liquid amount sucked by the compressor 14 in the defrosting mode can be reduced, so that the defrosting time is shortened, and the control precision of the temperature and humidity of the air conditioning unit is improved.

In some embodiments, referring to fig. 1, humidifier 11 includes a housing 111, and a first conduit 112 and a second conduit 113 disposed within housing 111 and in parallel. It should be understood that the first conduit 112 and the second conduit 113 are physically separate. The housing 111 is filled with a liquid, such as water. The first and

second lines

112 and 113 are surrounded by liquid within the housing 111. An exhaust port of the compressor 14 communicates with the indoor heat exchanger 12 via a first pipe 112, and a suction port of the compressor 14 is configured to communicate with the gas-liquid separator 13 via a second pipe 113.

In the above embodiment, the refrigerant gas in the first pipeline 112 can exchange heat with the liquid in the casing 111, so as to increase the temperature of the liquid in the casing 111. The refrigerant gas in the second pipeline 113 can also exchange heat with the liquid in the shell 111, so that the temperature of the refrigerant gas sucked by the compressor 14 is increased.

In some embodiments, the defrosting mode may include a first defrosting mode and a second defrosting mode. The outdoor unit 20 of the air conditioning unit includes a first outdoor heat exchanger 51 and a second outdoor heat exchanger 52. The first outdoor heat exchanger 51 is configured to radiate heat in the first defrosting mode and absorb heat in the second defrosting mode; the second outdoor heat exchanger 52 is configured to absorb heat in the first defrosting mode and dissipate heat in the second defrosting mode.

In other words, in the first defrosting mode, the first outdoor heat exchanger 51 defrosts, and the second outdoor heat exchanger 52 cools; in the second defrosting mode, the second outdoor heat exchanger 52 defrosts and the first outdoor heat exchanger 51 cools. In addition, the indoor heat exchanger radiates heat in the first defrosting mode and the second defrosting mode, namely, the indoor unit realizes heating. As such, the first and second

outdoor heat exchangers

51 and 52 may alternately defrost. Since the discharge port of the compressor 14 communicates with the indoor heat exchanger 12 via the humidifier 11, and the suction port of the compressor 14 is configured to communicate with the gas-liquid separator 13 via the humidifier 11. Therefore, the liquid amount sucked by the compressor 14 in the first defrosting mode and the second defrosting mode can be reduced, the defrosting time in the two modes is shortened, and the temperature and humidity control precision of the air conditioning unit is improved.

Fig. 1 also shows a first outdoor fan 59 and a second outdoor fan 60. For example, the first outdoor fan 59 and the first outdoor heat exchanger 51 are on the same air passage, the second outdoor fan 60 and the second outdoor heat exchanger 52 are on the other air passage, and the two air passages are independent of each other.

In some embodiments, the indoor unit IU further includes a control valve 15 disposed between the suction port of the compressor 14 and the gas-liquid separator 13, configured to control whether the suction port of the compressor 14 communicates with the gas-liquid separator 13 via the humidifier 11. By controlling the different states of the valve 15, it is possible to control the communication of the suction port of the compressor 14 with the gas-liquid separator 13 via the humidifier 11 or the communication with the gas-liquid separator 13 without via the humidifier 11.

As some implementations, the control valve 15 includes a first control valve 151 and a second control valve 152. The first control valve 151 is disposed between one of the suction port of the compressor 14 and the gas-liquid separator 13 and the humidifier 11. For example, referring to fig. 1, the first control valve 151 may be disposed between a suction port of the compressor 14 and the humidifier 11; for another example, the first control valve 151 may be provided between the gas-liquid separator 13 and the humidifier 11. The second control valve 152 is connected in parallel with the first control valve 151 and is disposed between the suction port of the compressor 14 and the gas-liquid separator 13.

In other words, two passages, for example, a first passage and a second passage, exist between the suction port of the compressor 14 and the gas-liquid separator 13. The first path is provided with a humidifier 11 and a first control valve 151, and the second path is provided with a second control valve 152. The first control valve 151 may control whether the refrigerant gas is sucked into the compressor 14 through the first passage, and the second control valve 152 may control whether the refrigerant gas is sucked into the compressor 14 through the second passage.

For example, the first control valve 151 and the second control valve 152 are energized to an on state and de-energized to an off state. In some embodiments, at least one of the first control valve 151 and the second control valve 152 may include an electric ball valve or a solenoid valve.

In some embodiments, the indoor unit IU further comprises a first three-way valve 16. A first port of the first three-way valve 16 communicates with the gas-liquid separator 13, a second port of the first three-way valve 16 communicates with the humidifier 11 and the first ports of the first three-way valve 16, and a third port of the first three-way valve 16 communicates with the control valve 15 and the first ports of the first three-way valve 16. For example, the second port of the first three-way valve 16 communicates with the second conduit 113 in the humidifier 11. For example, the third port of the first three-way valve 16 communicates with the second one 152 of the control valves 15.

In the following, some specific implementations of the connection of the indoor unit IU to the outdoor unit OU in case the outdoor unit OU comprises two outdoor heat exchangers are described.

Referring to fig. 1, the indoor unit IU further includes a second three-way valve 17, a third three-way valve 18, a third control valve 19, a first four-way valve 20, a fourth control valve 21, and a second four-way valve 22. For example, the third control valve 19 and the fourth control valve 21 are energized to the on state and de-energized to the off state. In some embodiments, at least one of the third control valve 19 and the fourth control valve 21 may comprise an electrically operated ball valve or a solenoid valve.

A first port of the second three-way valve 17 communicates with the humidifier 11, and a second port and a third port of the second three-way valve 17 both communicate with the first port. For example, the first port of the second three-way valve 17 communicates with the first conduit 112 of the humidifier 11 via another three-way valve 311.

The first port D of the third three-way valve 18 communicates with the gas-liquid separator 13, and the second port C and the third port E of the third three-way valve 17 both communicate with the first port D.

The first port D of the first four-way valve 20 communicates with the second port of the second three-way valve 17, and with one of the second port C and the third port E of the first four-way valve 20. The second port C of the first four-way valve 20 communicates with the first outdoor heat exchanger 51, and the third port E of the first four-way valve 20 communicates with the indoor heat exchanger 12 via the third control valve 19. The fourth port S of the first four-way valve 20 communicates with the other of the second port C and the third port E of the first four-way valve 20, and communicates with the second port of the third three-way valve 18. For example, when the first four-way valve 20 is powered down, the first port D is communicated with the second port C, and the fourth port S is communicated with the third port E; when the first four-way valve 20 is powered, the first port D communicates with the third port E, and the fourth port S communicates with the second port C.

The first port D of the second four-way valve 22 communicates with the third port of the second three-way valve 17, and communicates with one of the second port C and the third port E of the second four-way valve 22. A second port C of the second four-way valve 22 communicates with the second outdoor heat exchanger 52, and a third port E of the second four-way valve 22 communicates with the indoor heat exchanger 12 via the fourth control valve 21. The fourth port S of the second four-way valve 22 communicates with the other of the second port C and the third port E of the second four-way valve 22, and communicates with the third port of the third three-way valve 18.

The structure of the indoor unit group IU according to some implementations of the present disclosure is described above. It should be understood that in case that the outdoor unit OU includes more (e.g. 3 or more) outdoor heat exchangers, the corresponding components may be disposed in the indoor unit IU, respectively, to realize that the outdoor heat exchangers can defrost alternately, and the indoor heat exchanger 12 can heat when defrosting.

In some embodiments, the indoor unit IU further comprises a first shut-off valve 23 and a second shut-off valve 24. In some embodiments, the outdoor unit OU further includes a third stop valve 53 and a fourth stop valve 54. In this case, the indoor unit IU and the outdoor unit OU may be separated from each other. For example, the second port C of the first four-way valve 20 communicates with the first outdoor heat exchanger 51 via the first cut-off valve 23 and the third cut-off valve 53 in this order. For example, the second port C of the second four-way valve 22 communicates with the second outdoor heat exchanger 52 via the second cut-off valve 24 and the fourth cut-off valve 54 in this order.

In some embodiments, referring to fig. 1, the outdoor unit OU further includes a liquid storage tank 55. The discharge port of the compressor 14 communicates with the first port of the indoor heat exchanger 12 via the humidifier 11, and the second port of the indoor heat exchanger 12, the first outdoor heat exchanger 51, and the second outdoor heat exchanger 52 all communicate with the reservoir 55.

For example, the second port C of the first four-way valve 20 communicates with the first port of the first outdoor heat exchanger 51 via the first cut-off valve 23 and the third cut-off valve 53 in this order, the second port C of the second four-way valve 22 communicates with the first port of the second outdoor heat exchanger 52 via the second cut-off valve 24 and the fourth cut-off valve 54 in this order, and both the second port of the first outdoor heat exchanger 51 and the second port of the second outdoor heat exchanger 52 communicate with the receiver tank 55.

The indoor heat exchanger 12 and the manner in which the two outdoor heat exchangers communicate with the accumulator 55 will now be described.

In some implementations, the indoor unit IU further comprises a first electronic expansion valve 25 and a fifth stop valve 26. In some embodiments, the outdoor unit OU further includes a sixth shutoff valve 56. The second port of the indoor heat exchanger 12 is communicated with the reservoir tank 55 via the first electronic expansion valve 25, the fifth cut-off valve 26, the sixth cut-off valve 56 in this order.

In some implementations, the outdoor unit OU further includes a second electronic expansion valve 57 and a third electronic expansion valve 58. A second electronic expansion valve 57 is disposed between the reservoir tank 55 and the first outdoor heat exchanger 51, and a third electronic expansion valve 58 is disposed between the reservoir tank 55 and the second outdoor heat exchanger 52. For example, the second electronic expansion valve 57 is disposed between the reservoir tank 55 and the second port of the first outdoor heat exchanger 51, and the third electronic expansion valve 58 is disposed between the reservoir tank 55 and the second port of the second outdoor heat exchanger 52.

It should be noted that in the embodiments of the present disclosure, a component is disposed between two other components, and it is understood that the component is disposed on a path between the two other components.

In some embodiments of the present disclosure, referring to fig. 1, the indoor unit IU further comprises a fifth control valve 27, a reheater 28 and an indoor fan 29.

The discharge port of the compressor 14 communicates with the first port of the indoor heat exchanger 12 via the humidifier 11. For example, the exhaust port of the compressor 14 communicates with the first port of the indoor heat exchanger 12 via the first piping 111 in the humidifier 11.

A first port of the reheater 28 communicates with the humidifier 11 via the fifth control valve 27, and a second port of the reheater 28 communicates with a second port of the indoor heat exchanger 12. For example, the first port of the reheater 28 communicates with the first pipe 111 in the humidifier 11 via the fifth control valve 27. For example, a second port of the reheater 28 is in communication with a second port of the indoor heat exchanger 12 and the receiver tank 55 via a fourth electronic expansion valve 30. In some embodiments, the indoor unit IU further comprises a fourth three-way valve 31, the first line 111 communicates with a first port of the fourth three-way valve 31, the second three-way valve 17 communicates with a second port of the fourth three-way valve 31, and the first port of the reheater 28 communicates with a third port of the fourth three-way valve 31 via a fifth control valve 27.

The indoor fan 29 is provided so that return air passes through the indoor heat exchanger 12 and the reheater 28 in this order.

In the above-described embodiment, in the case where the interior is at a high humidity and a low temperature, if dehumidification is desired, cooling is required. By passing the return air through the indoor heat exchanger 12 and the reheater 28 in this order, the indoor temperature is prevented from being excessively low, so that dehumidification can be performed with the current temperature substantially maintained.

The specific structures of the indoor unit IU and the outdoor unit OU according to some embodiments of the present disclosure are introduced as above. It is to be understood that the different embodiments above may be combined. In addition, in different embodiments, the indoor unit IU and the outdoor unit OU may further include other components shown in fig. 1, for example, a bulb T, a sensor SR, a capillary tube SL, a filter F, and the like.

For example, an exhaust bulb T may be disposed at an exhaust port of the compressor 14, an inlet tube bulb T and an outlet tube bulb T may be disposed at first and second ports of the indoor heat exchanger 12, respectively, an outlet tube bulb T may be disposed at a second port of the reheater 28, an inlet tube bulb T and a defrosting bulb T may be disposed at first and second ports of the first outdoor heat exchanger 51, respectively, and an inlet tube bulb T and a defrosting bulb T may be disposed at first and second ports of the second outdoor heat exchanger 52, respectively.

For example, the outlet of the first pipe 111 of the humidifier 11, the inlet of the gas-liquid separator 13, and the discharge port of the compressor may be provided with pressure sensors SR, respectively, to detect the pressure in the passages.

For example, a capillary tube SL may be provided in a passage between the second port E of each of the first four-way valve 20 and the second four-way valve 22 and the gas-liquid separator 13, and a capillary tube SL may be provided in a passage between the second port of the reheater 28 and the gas-liquid separator 13.

For example, filters F may be respectively provided between the indoor heat exchanger 12 and the first electronic expansion valve 14, between the second port of the reheater 28 and the fourth electronic expansion valve 30, between the second port of the reheater 28 and the gas-liquid separator 13, between the first electronic expansion valve 25 and the fifth cut-off valve 26, between the sixth cut-off valve 56 and the reservoir tank 55, between the second electronic expansion valve 57 and the first outdoor heat exchanger 51, between the third electronic expansion valve 58 and the second outdoor heat exchanger 52, between the third cut-off valve 53 and the first outdoor heat exchanger 51, between the fourth cut-off valve 54 and the second outdoor heat exchanger 52, between the second port C of the first four-way valve 20 and the first cut-off valve 23, and between the second port C of the second four-way valve 22 and the second cut-off valve 24.

The embodiment of the disclosure also provides a control method of the air conditioning unit in any one of the above embodiments. The control method comprises the following steps: and controlling the air suction port of the compressor to be communicated with the gas-liquid separator through the humidifier in at least one of the first defrosting mode and the second defrosting mode.

For example, the suction port of the compressor may be made to communicate with the gas-liquid separator via the humidifier by controlling the state of the control valve 15. For example, the first control valve 151 may be controlled to be on, and the second control valve 152 may be controlled to be off.

In the above embodiment, the compressor discharges air and also sucks air through the humidifier. Under such structure, inhale and absorb the heat from the humidifier, improve and inhale the superheat degree, can reduce the inspiratory liquid volume of compressor under at least one defrosting mode to reduce the time of defrosting, improve the control accuracy of air conditioning unit's humiture.

In some embodiments, in the cooling mode, the suction port of the compressor is controlled to communicate with the gas-liquid separator via the humidifier. For example, the suction port of the compressor may be made to communicate with the gas-liquid separator via the humidifier by controlling the state of the control valve 15. For example, the first control valve 151 may be controlled to be on, and the second control valve 152 may be controlled to be off.

In the above embodiment, the compressor discharges air and also sucks air through the humidifier. In such a way, on one hand, the air suction absorbs heat from the humidifier, the air suction superheat degree is improved, and the liquid amount sucked by the compressor is reduced; on the other hand, the exhaust temperature can be further reduced due to the absorption of air suction to heat, so that the cooling of the refrigerant can be assisted, the refrigerant is more fully condensed, the pressure of the refrigerant on the high-pressure side is reduced, the reduction of the operating power of the air conditioning unit is facilitated, and the power consumption is saved. Therefore, the power consumption can be saved, and the adverse effect on the refrigeration effect can be avoided.

In some embodiments, in the heating mode, the suction port of the compressor is controlled not to communicate with the gas-liquid separator via the humidifier. For example, the suction port of the compressor may be made to communicate with the gas-liquid separator not via the humidifier by controlling the state of the control valve 15. For example, the first control valve 151 may be controlled to be turned off, and the second control valve 152 may be controlled to be turned on.

In the above embodiment, the compressor exhausts air through the humidifier and inhales air through the humidifier, thereby avoiding exhaust heat loss caused by inhaling air. In such a mode, the influence of external factors on the high-pressure side refrigerant in the heating mode can be reduced, and the heating effect can be effectively ensured.

Fig. 2 shows a flow direction of the refrigerant in the first defrosting mode. Fig. 3 illustrates a flow direction of the refrigerant in the second defrosting mode.

The following table shows states of parts of components in the indoor unit IU and the outdoor unit OU in the first defrosting mode and the second defrosting mode. It should be understood that the output power of the compressor can be adjusted, the rotational speed of the fan can be adjusted, and the opening degree of the electronic expansion valve can be adjusted.

Name of component	First frost removal mode	Second frost removal mode
			Compressor 14	Operation of	Operation of
Indoor fan 29	Operation of	Operation of
			First four-way valve 20	Power down	Get electricity
Second four-way valve 22	Get electricity	Power down
			Fifth control valve 27	Power down	Power down
Fourth control valve 21	Get electricity	Power down
			Third control valve 19	Power down	Get electricity
First control valve 151	Get electricity	Get electricity
			Second control valve 152	Power down	Power down
First electronic expansion valve 25	Full open	Full open
			Fourth electronic expansion valve 30	Close off	Close off
Second electronic expansion valve 57	Full open	Open
			Third electronic expansion valve 58	Open	Full open
First outdoor fan 59	Stop	Operation of
			Second outdoor fan 60	Operation of	Stop

By controlling in the above manner, the air conditioning unit may be in the first defrosting mode and the second defrosting mode, so that the first outdoor heat exchanger 51 and the second outdoor heat exchanger 52 are defrosted respectively.

An embodiment of the present disclosure further provides a control device of an air conditioning unit according to any one of the above embodiments, including: a control module configured to control a suction port of the compressor to communicate with the gas-liquid separator via the humidifier in at least one of the first and second defrosting modes.

Fig. 4 is a schematic structural diagram of a control device of an air conditioning unit according to some embodiments of the present disclosure.

As shown in fig. 4, the control device 400 of this embodiment includes a memory 401 and a processor 402 coupled to the memory 401, and the processor 402 is configured to execute the method of any one of the foregoing embodiments based on instructions stored in the memory 401.

The memory 401 may include, for example, a system memory, a fixed non-volatile storage medium, and the like. The system memory may store, for example, an operating system, application programs, a Boot Loader (Boot Loader), and other programs.

The control device 400 may further include an input-output interface 403, a network interface 404, a storage interface 405, and the like. The

interfaces

403, 404, 405 and the memory 401 and the processor 402 may be connected by a bus 406, for example. The input/output interface 403 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 404 provides a connection interface for various networking devices. The storage interface 405 provides a connection interface for external storage devices such as an SD card and a usb disk.

As shown in fig. 5, the air conditioning apparatus includes: at least one of the air conditioning unit 501 according to any one of the embodiments and the control device (for example, the control device 400) of the air conditioning unit according to any one of the embodiments.

The embodiment of the disclosure also provides a constant temperature and humidity air conditioning system which comprises the air conditioning equipment of any one of the embodiments.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other. For the embodiment of the control device, since it basically corresponds to the embodiment of the method, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the embodiment of the method.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that the functions specified in one or more of the flows in the flowcharts and/or one or more of the blocks in the block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An air conditioning unit comprising an indoor unit, the indoor unit comprising:

a humidifier;

an indoor heat exchanger configured to dissipate heat in a defrosting mode;

a gas-liquid separator; and

a compressor having a discharge port communicating with the indoor heat exchanger via the humidifier, a suction port of the compressor being configured to communicate with the gas-liquid separator via the humidifier.

2. The air conditioning assembly according to claim 1, wherein the defrost mode includes a first defrost mode and a second defrost mode;

the air conditioning unit further includes an outdoor unit including:

a first outdoor heat exchanger configured to radiate heat in the first defrosting mode and absorb heat in the second defrosting mode; and

a second outdoor heat exchanger configured to absorb heat in the first defrosting mode and to dissipate heat in the second defrosting mode.

3. The air conditioning assembly of claim 1, wherein the humidifier comprises:

a housing filled with a liquid; and

a first pipe and a second pipe connected in parallel, disposed in the housing and surrounded by the liquid, wherein a discharge port of the compressor communicates with the indoor heat exchanger via the first pipe, and a suction port of the compressor is configured to communicate with the gas-liquid separator via the second pipe.

4. The air conditioning unit according to any one of claims 1 to 3, wherein the indoor unit further comprises a control valve provided between the suction port of the compressor and the gas-liquid separator, configured to control whether or not the suction port of the compressor communicates with the gas-liquid separator via the humidifier.

5. The air conditioning assembly of claim 4, wherein the control valve comprises:

a first control valve provided between the humidifier and one of the gas-liquid separator and the suction port of the compressor;

and a second control valve connected in parallel with the first control valve and disposed between the suction port of the compressor and the gas-liquid separator.

6. The air conditioning assembly according to claim 4, wherein the indoor unit further comprises:

a first three-way valve having a first port in communication with the gas-liquid separator, a second port in communication with the humidifier and the first port of the first three-way valve, and a third port in communication with the control valve and the first port of the first three-way valve.

7. The air conditioning assembly according to claim 2, wherein the indoor unit further comprises:

a second three-way valve, a first port of the second three-way valve being in communication with the humidifier, a second port and a third port of the second three-way valve both being in communication with the first port;

a third three-way valve, a first port of the third three-way valve being in communication with the gas-liquid separator, a second port and a third port of the third three-way valve both being in communication with the first port;

a third control valve;

a first four-way valve, a first port of which communicates with the second port of the second three-way valve and with one of a second port and a third port of which the second port communicates with the first outdoor heat exchanger, a third port of which communicates with the indoor heat exchanger via the third control valve, and a fourth port of which communicates with the other of the second port and the third port of the first four-way valve and with the second port of the third three-way valve;

a fourth control valve; and

a second four-way valve, a first port of which communicates with the third port of the second three-way valve and with one of the second port and the third port of the second four-way valve, a second port of which communicates with the second outdoor heat exchanger, a third port of which communicates with the indoor heat exchanger via the fourth control valve, and a fourth port of which communicates with the other of the second port and the third port of the second four-way valve and with the third port of the third three-way valve.

8. The air conditioning assembly of claim 7, wherein:

the indoor unit further comprises a first stop valve and a second stop valve, and the outdoor unit further comprises a third stop valve and a fourth stop valve;

a second port of the first four-way valve is communicated with the first outdoor heat exchanger through the first stop valve and the third stop valve in sequence;

and a second port of the second four-way valve is communicated with the second outdoor heat exchanger through the second stop valve and the fourth stop valve in sequence.

9. The air conditioning assembly of claim 2, wherein:

the outdoor unit also comprises a liquid storage tank;

the air outlet of the compressor is communicated with the first port of the indoor heat exchanger through the humidifier, and the second port of the indoor heat exchanger, the first outdoor heat exchanger and the second outdoor heat exchanger are communicated with the liquid storage tank.

10. The air conditioning assembly of claim 9, wherein:

the indoor unit further comprises a first electronic expansion valve and a fifth stop valve, and the outdoor unit further comprises a sixth stop valve;

and the second port of the indoor heat exchanger is communicated with the liquid storage tank through the first electronic expansion valve, the fifth stop valve, the sixth stop valve in sequence.

11. The air conditioning assembly according to claim 9, wherein the outdoor unit further comprises:

the second electronic expansion valve is arranged between the liquid storage tank and the first outdoor heat exchanger;

and the third electronic expansion valve is arranged between the liquid storage tank and the second outdoor heat exchanger.

12. The air conditioning assembly according to claim 1, wherein the discharge port of the compressor communicates with the first port of the indoor heat exchanger via the humidifier, the indoor assembly further comprising:

a fifth control valve;

a reheater, a first port of the reheater being in communication with the humidifier via the fifth control valve, a second port of the reheater being in communication with a second port of the indoor heat exchanger;

and the indoor fan is arranged to enable return air to sequentially pass through the indoor heat exchanger and the reheater.

13. A control method of an air conditioning unit as set forth in any of claims 1-12, comprising:

controlling a suction port of the compressor to communicate with the gas-liquid separator via the humidifier in at least one of the first and second defrosting modes.

14. The method of claim 13, further comprising:

and in a cooling mode, controlling the air suction port of the compressor to be communicated with the gas-liquid separator through the humidifier.

15. The method of claim 13 or 14, further comprising:

in the heating mode, the air suction port of the compressor is controlled not to be communicated with the gas-liquid separator through the humidifier.

16. A control device of an air conditioning unit as set forth in any of claims 1-12, comprising:

a control module configured to control a suction port of the compressor to communicate with the gas-liquid separator via the humidifier in at least one of the first and second defrosting modes.

17. A control device of an air conditioning unit, comprising:

a memory; and

a processor coupled to the memory and configured to perform the method of any of claims 13-15 based on instructions stored in the memory.

18. An air conditioning apparatus comprising: at least one of an air conditioning assembly according to any of claims 1 to 12 and a control device for an air conditioning assembly according to any of claims 16 to 17.

19. A constant temperature and humidity air conditioning system comprising the air conditioning apparatus of claim 18.

20. A computer readable storage medium having computer program instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of any of claims 13-15.