CN210832602U

CN210832602U - Air conditioner

Info

Publication number: CN210832602U
Application number: CN201921806345.0U
Authority: CN
Inventors: 石文星; 张�浩; 李金波; 黎顺全; 雷俊杰
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-23
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses an air conditioner, wherein, the air conditioner comprises an outdoor unit and an indoor unit; the dehumidification system also comprises a first piping which is sequentially connected with the discharge pipe, the outdoor heat exchanger, the outdoor throttling regulating device, the dehumidification throttling regulating device and the dehumidification heat exchanger, and a second piping which is connected with the dehumidification heat exchanger and the low-pressure suction pipe to form a dehumidification loop; the reheating device further comprises a third pipe and a first branch pipe branched from the discharge pipe, wherein the third pipe connects the first intersection of the first pipe, the reheating throttling regulating device, the reheating heat exchanger and the first branch pipe in sequence to form a reheating circuit; the indoor unit further comprises a first reversing device, the first reversing device has a first switching state and a second switching state, and the first reversing device communicates the first pipe with the reheat heat exchanger in the first switching state; in the second switching state, the first reversing device communicates the third pipe with the reheat heat exchanger. The utility model discloses technical scheme is favorable to improving the adaptability of air conditioner.

Description

Air conditioner

Technical Field

The utility model relates to an air conditioner technical field, in particular to air conditioner.

Background

Along with the improvement of living standard of people, people have higher and higher requirements on air conditioners. Due to the complexity of weather, people sometimes need cooling by cold, sometimes need heating by heat, and sometimes need dehumidification under the condition of not changing the temperature greatly. However, the conventional air conditioner has a single function and is difficult to meet the requirements of people.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an air conditioner aims at improving the suitability of air conditioner in order to satisfy user's demand.

In order to achieve the above object, the present invention provides an air conditioner, comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compression mechanism, an outdoor heat exchanger and an outdoor throttling regulation device, and the indoor unit comprises a dehumidification heat exchanger and a dehumidification throttling regulation device;

the air conditioner further includes: a discharge pipe connected to a discharge side of the compression mechanism, a low-pressure suction pipe connected to a low-pressure suction side of the compression mechanism, a first pipe connecting the discharge pipe, the outdoor heat exchanger, the outdoor throttle control device, the dehumidification throttle control device, and the dehumidification heat exchanger in this order, and a second pipe connecting the dehumidification heat exchanger and the low-pressure suction pipe, thereby constituting a dehumidification circuit;

the indoor unit also comprises a reheating heat exchanger, a reheating throttling regulation device and a heat circulation device for sending the heat or cold of the indoor unit into the room;

the air conditioner further includes a third pipe and a first branch pipe branching from the discharge pipe, the third pipe connecting a first intersection of the first pipe, the reheat throttle control device, the reheat heat exchanger, and the first branch pipe in this order to form a reheat circuit, wherein the first intersection is located between the dehumidification throttle control device and the outdoor throttle control device;

the indoor unit further comprises a first reversing device having a first switching state and a second switching state,

in the first switching state, the first reversing device communicates the second pipe with the reheat heat exchanger;

in the second switching state, the first reversing device communicates the third pipe with the reheat heat exchanger.

Optionally, the outdoor unit further comprises a second reversing device having a third switching state and a fourth switching state,

in the third switching state, the second reversing device causes the discharge pipe to communicate with the first pipe and causes the low-pressure suction pipe to communicate with the second pipe;

in the fourth switching state, the second reversing device causes the discharge pipe to communicate with the second pipe and causes the low-pressure suction pipe to communicate with the first pipe.

Optionally, the first reversing device is a three-way valve or a four-way valve with one closed end.

Optionally, the first reversing device includes a first control valve and a second control valve, and the third pipe connects the first junction of the first pipe, the reheat throttle adjusting device, the reheat heat exchanger, the first control valve, and the first branch pipe in this order;

the indoor unit further includes a second branch pipe that branches off from the second pipe, and the second branch pipe connects a second intersection of the second control valve and the third pipe, wherein the second intersection is located between the first control valve and the reheat heat exchanger.

Optionally, the dehumidification throttle adjustment device comprises a dehumidification throttle valve, and the reheat throttle adjustment device comprises a reheat throttle valve.

Optionally, the heat cycle device is an air supply device, and the dehumidification heat exchanger and the reheat heat exchanger are disposed in an airflow path formed by the air supply device.

Optionally, the air conditioner further includes a first connection pipe branched from a third intersection of the first pipe, the third intersection being located between the dehumidification throttling regulation device and the outdoor heat exchanger, a second connection pipe branched from the second pipe, and a third connection pipe branched from the third pipe;

the air conditioner further comprises a plurality of indoor units, and the indoor units are connected to the first connecting pipe, the second connecting pipe and the third connecting pipe in parallel.

Optionally, the air conditioner further comprises a heat exchange water tank and a floor heating water flow pipe communicated with the heat exchange water tank;

a floor heating heat exchanger is arranged in the heat exchange water tank, a refrigerant inlet of the floor heating heat exchanger is communicated with a third distribution pipe, a refrigerant outlet of the floor heating heat exchanger is communicated with the first distribution pipe, and a third control valve is arranged on the second distribution pipe.

Optionally, the air conditioner further comprises an economizer; the economizer is disposed on a first pipe between the outdoor heat exchanger and a first junction, and a return pipe of the economizer communicates with a medium-pressure suction port of the compression mechanism.

Optionally, the air conditioner further comprises a gas-liquid separator and an economizer, wherein the gas-liquid separator is arranged on the low-pressure suction pipe; the economizer is disposed on a first pipe between the outdoor heat exchanger and the first intersection, and a return pipe of the economizer is communicated with the gas-liquid separator.

The utility model discloses an air conditioner adopts and sets up the first switching-over device at the indoor unit, the first switching-over device has first switching state and second switching state, under the first switching state, the first switching-over device will the second piping with reheat heat exchanger intercommunication; in the second switching state, the first reversing device communicates the third pipe with the reheat heat exchanger; therefore, when the first reversing device is switched to the first state, the refrigerant in the first pipeline flows into the dehumidifying heat exchanger and the reheating heat exchanger respectively for refrigeration, finally, the refrigerant is converged and flows into the second pipeline and flows back to the compression mechanism through the second pipeline, and at the moment, the air passes through the dehumidifying heat exchanger and the reheating heat exchanger, and refrigeration can be realized; when the first reversing device is switched to the second state, the refrigerant in the third piping flows into the reheat heat exchanger for heating, then is combined with the refrigerant in the first piping and flows into the dehumidification heat exchanger for cooling, finally flows into the second piping and flows back into the compression mechanism through the second piping, at the moment, the air passes through the dehumidification heat exchanger and the reheat heat exchanger, the dehumidification heat exchanger performs refrigeration, and the reheat heat exchanger performs heating, so that dehumidification and reheating (cooling and dehumidification are not performed) can be realized. So for the air conditioner can realize dehumidification reheat, also can realize refrigerating, thereby makes the function of air conditioner increase, can satisfy user's demand.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

FIG. 2 is a schematic structural diagram of another embodiment of the air conditioner of the present invention;

fig. 3 is a schematic structural view of the air conditioner according to the next embodiment of the present invention in the cooling mode;

fig. 4 is a schematic structural diagram of the next embodiment of the heating mode of the air conditioner of the present invention;

FIG. 5 is a schematic structural diagram of the air conditioner in the dehumidification reheating mode according to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of an air conditioner;

FIG. 7 is a schematic structural diagram of the air conditioner of FIG. 6 in a cooling mode according to a further embodiment;

fig. 8 is a schematic structural view of another embodiment of the air conditioner of the present invention;

fig. 9 is a schematic structural diagram of a fifth embodiment of the air conditioner of the present invention;

fig. 10 is a schematic structural view of another embodiment of the air conditioner of the present invention in a cooling mode;

fig. 11 is a schematic structural view of another embodiment of the air conditioner of the present invention in a cooling mode;

fig. 12 is a schematic structural view of another embodiment of the air conditioner of the present invention in the heating mode;

fig. 13 is a schematic structural view of another embodiment of the air conditioner of the present invention in the heating mode;

fig. 14 is a schematic structural view of a fourth embodiment of the air conditioner of the present invention in the heating mode;

fig. 15 is a schematic structural view of a fifth embodiment of the air conditioner of the present invention in the heating mode;

fig. 16 is a schematic structural diagram of a sixth embodiment of the air conditioner of the present invention in the heating mode.

The reference numbers illustrate:

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

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

The specific structure of the air conditioner will be mainly described below.

Referring to fig. 1 to 5, the whole piping structure and the component arrangement of the air conditioner will be described first; in the embodiment of the present invention, the air conditioner includes an outdoor unit 100 and an indoor unit 200, the outdoor unit 100 includes a compression mechanism 110, an outdoor heat exchanger 150 and an outdoor throttling adjustment device 120, the indoor unit 200 includes a dehumidifying heat exchanger 210 and a dehumidifying throttling adjustment device 230;

the air conditioner further includes: a discharge pipe 111 connected to a discharge side of the compression mechanism 110, a low-pressure suction pipe 113 connected to a low-pressure suction side of the compression mechanism 110, a first pipe 160 connecting the discharge pipe 111, the outdoor heat exchanger 150, the outdoor throttle controller 120, the dehumidification throttle controller 230, and the dehumidification heat exchanger 210 in this order, and a second pipe 170 connecting the dehumidification heat exchanger 210 and the low-pressure suction pipe 113, thereby constituting a dehumidification circuit;

the indoor unit 200 further includes a reheat heat exchanger 220, a reheat throttle adjusting device 240, and a heat cycle device for sending heat or cold of the indoor unit 200 into the room;

the air conditioner further includes a third pipe 180 and a first branch pipe 112 branched from the discharge pipe 111, the third pipe 180 sequentially connecting a first junction 161 of the first pipe 160, the reheat throttle control device 240, the reheat heat exchanger 220, and the first branch pipe 112 to constitute a reheat circuit, wherein the first junction 161 is located between the dehumidification throttle control device 230 and the outdoor throttle control device 120;

the indoor unit 200 further comprises a first commutation device 250, the first commutation device 250 having a first switching state and a second switching state,

in the first switching state, the first reversing device 250 communicates the second pipe 170 with the reheat heat exchanger 220;

in the second switching state, the first reversing device 250 communicates the third pipe 180 with the reheat heat exchanger 220.

The heat circulation device may be an air supply device in some embodiments, and the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 are disposed in an airflow path formed by the air supply device. Specifically, the air supply device may be a wind wheel, and the wind wheel rotates to convey air after exchanging heat with the dehumidification heat exchanger 210 and the reheat heat exchanger 220 indoors. Of course, in other embodiments, the heat cycle device may also be a water cycle device, and the dehumidification heat exchanger 210 and the reheat heat exchanger 220 send heat or cold to the indoor through the circulating water flowing in the water cycle device.

On the basis of the pipelines, the dehumidification heat exchanger 210 of the air conditioner refrigerates, and the reheating heat exchanger 220 heats, so that constant-temperature dehumidification can be realized. Wherein the dehumidification throttle adjusting device 230 comprises a dehumidification throttle valve, and the reheat throttle adjusting device 240 comprises a reheat throttle valve. Here, the dehumidification throttle and the reheat throttle may use electronic expansion valves.

It should be noted that, in this embodiment, the first reversing device 250 is disposed in the indoor unit 200, so that the air conditioner can achieve dehumidification and reheating, and also can achieve refrigeration, so that the functions of the air conditioner are increased, and the requirements of users can be met.

For example, in the first switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the dehumidification throttle control device 230 and the reheat throttle control device 240, enters the dehumidification heat exchanger 210 and the reheat heat exchanger 220 to be cooled, finally merges into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. At this time, both the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 cool, so that strong cooling can be achieved.

Alternatively, in the first switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the dehumidification throttle control device 230, enters the dehumidification heat exchanger 210 to perform cooling, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. At this time, since the opening degree of the reheat throttle control device 240 is adjusted to zero, that is, the reheat throttle control device 240 is turned off, only the dehumidification heat exchanger 210 performs cooling, and normal cooling can be performed.

Alternatively, in the first switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the reheat throttle control device 240, enters the reheat heat exchanger 220 to be cooled, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. At this time, the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero, that is, the dehumidification throttle adjusting device 230 is closed, and therefore, only the reheat heat exchanger 220 performs cooling, and normal cooling can be performed.

In the second switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the high-temperature and high-pressure refrigerant flows into the first pipe 160, the other part of the high-temperature and high-pressure refrigerant flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to reheat and dehumidify the air, is throttled by the reheat throttle control device 240 to form a high-pressure refrigerant, and the high-pressure refrigerant is merged with the refrigerant in the first pipe 160, then flows into the dehumidification heat exchanger 210 to evaporate and dehumidify the air, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. At this time, the dehumidifying heat exchanger 210 cools air, and the reheating heat exchanger 220 heats air, thereby realizing dehumidifying and reheating.

In some embodiments, referring to fig. 1 to 5, the first direction-changing device 250 is a three-way valve or a four-way valve with one closed end.

Of course, in other embodiments, referring to fig. 6 and 7, the first direction switching device 250 may further include two control valves. Specifically, the first switching device 250 includes a first control valve 251 and a second control valve 252, and the third pipe 180 connects the first junction 161 of the first pipe 160, the reheat throttle adjusting device 240, the reheat heat exchanger 220, the first control valve 251, and the first branch pipe 112 in this order;

the indoor unit 200 further includes a second branch pipe 254 branched from the second pipe 170, and the second branch pipe 254 connects a second junction 253 of the second control valve 252 and the third pipe 180, wherein the second junction 253 is located between the first control valve 251 and the reheat heat exchanger 220.

In the present embodiment, when the first control valve 251 is closed and the second control valve 252 is opened, the second pipe 170 can be communicated with the reheat heat exchanger 220; when the first control valve 251 is opened and the second control valve 252 is closed, the third pipe 180 and the reheat heat exchanger 220 can be communicated with each other.

In some embodiments, referring to fig. 1 and 2, the outdoor unit 100 further includes a second reversing device 140, the second reversing device 140 has a third switching state and a fourth switching state,

in the third switching state, the second switching device 140 causes the discharge pipe 111 to communicate with the first pipe 160 and causes the low-pressure suction pipe 113 to communicate with the second pipe 170;

in the fourth switching state, the second switching device 140 causes the discharge pipe 111 to communicate with the second pipe 170, and causes the low-pressure suction pipe 113 to communicate with the first pipe 160.

The second reversing device 140 can change the flow path of the refrigerant, thereby changing the working mode of the air conditioner. In the third switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the refrigerant flows into the first pipe 160, the other part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, and finally flows back into the compression mechanism 110 from the second pipe 170; in the third switching state, the air conditioner can realize refrigeration and dehumidification reheating. In the fourth switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the refrigerant flows into the second pipe 170, the other part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, and finally flows back into the compression mechanism 110 from the first pipe 160; in the fourth switching state, the air conditioner can realize heating.

It should be noted that, by the arrangement of the first direction changing device 250 and the second direction changing device 140, not only the flow path of the refrigerant in the air conditioner can be changed, but also the air conditioner can realize various modes such as cooling, heating, dehumidifying and reheating. Several modes of operation of the air conditioner will be described in detail below with reference to specific embodiments.

A refrigeration mode:

referring to fig. 2 and 3, the first switching device 250 is adjusted to the first switching state, and the second switching device 140 is switched to the third switching state. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the dehumidification throttle control device 230 and the reheat throttle control device 240, enters the dehumidification heat exchanger 210 and the reheat heat exchanger 220 to be cooled, finally merges and flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. The dehumidifying heat exchanger 210 and the reheating heat exchanger 220 both cool, so that strong cooling can be achieved.

Referring to fig. 10, the first switching device 250 is adjusted to the first switching state, the second switching device 140 is switched to the third switching state, and the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160, the outdoor heat exchanger 150, is throttled by the dehumidification throttle control device 230, enters the dehumidification heat exchanger 210 to be cooled, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. Only the dehumidifying heat exchanger 210 performs refrigeration, and normal refrigeration can be realized.

Referring to fig. 11, the first reversing device 250 is adjusted to the first switching state, the second reversing device 140 is switched to the third switching state, and the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160, the outdoor heat exchanger 150, is throttled by the reheat throttle control device 240, enters the reheat heat exchanger 220 to be cooled, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. Only the reheat heat exchanger 220 is used for refrigerating, and common refrigerating can be realized.

Heating mode:

referring to fig. 4, the first switching device 250 is adjusted to the first switching state, and the second switching device 140 is switched to the fourth switching state. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the reheat heat exchanger 220 and the dehumidification heat exchanger 210 through the second pipe 170, heats, finally joins the two portions of the refrigerant, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 generate heat.

Referring to fig. 12, the first switching device 250 is adjusted to the second switching state, and the second switching device 140 is switched to the fourth switching state. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, and a part of the refrigerant flows into the third pipe 180 through the first branch pipe 112 and flows into the reheat heat exchanger 220 to perform heating; the other part flows into the dehumidifying heat exchanger 210 through the second pipe 170 to perform heating, and the last two parts join together and flow into the first pipe 160, and flow back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 generate heat.

Referring to fig. 13, the first reversing device 250 is adjusted to the second switching state, the second reversing device 140 is switched to the fourth switching state, and the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidifying heat exchanger 210 through the second pipe 170, heats, finally flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the dehumidifying heat exchanger 210 heats.

Referring to fig. 14, the first reversing device 250 is adjusted to the second switching state, the second reversing device 140 is switched to the fourth switching state, and the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to be heated, finally flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode, and in this mode, only the reheat heat exchanger 220 heats.

Referring to fig. 15, the first reversing device 250 is adjusted to the first switching state, the second reversing device 140 is switched to the fourth switching state, and the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the reheat heat exchanger 220 through the second pipe 170 to be heated, finally flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode, and in this mode, only the reheat heat exchanger 220 heats.

Referring to fig. 16, the first reversing device 250 is adjusted to the first switching state, the second reversing device 140 is switched to the fourth switching state, and the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidifying heat exchanger 210 through the second pipe 170, heats, finally flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the dehumidifying heat exchanger 210 heats.

Dehumidification reheating mode:

referring to fig. 5, the first switching device 250 is adjusted to the second switching state, and the second switching device 140 is switched to the third switching state. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the high-temperature and high-pressure refrigerant flows into the first pipe 160, the other part of the high-temperature and high-pressure refrigerant flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to reheat and dehumidify the air, is throttled by the reheat throttle control device 240 to form a high-pressure refrigerant, and the high-pressure refrigerant joins the refrigerant in the first pipe 160, flows into the dehumidification heat exchanger 210 to evaporate and dehumidify the air, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170.

In some embodiments, referring to fig. 1, 2, 8 and 9, the air conditioner includes a plurality of indoor units 200, for example, two, three or more indoor units 200, and the heat exchanger types included in the indoor units 200 may be different, such as an indoor unit with a constant temperature dehumidification function (including both the dehumidification heat exchanger 210 and the reheat heat exchanger 220, a normal cooling/heating indoor unit (including only one heat exchanger and a corresponding throttle adjusting device), and an indoor unit with a reversing device capable of freely switching a cooling state or a heating state, which may allow the air conditioner to perform a hybrid operation of cooling, heating, dehumidification and reheating.

Specifically, the air conditioner further includes a first connection pipe 310 branched from a third intersection 311 of the first pipe 160, a second connection pipe 320 branched from the second pipe 170, and a third connection pipe 330 branched from the third pipe 180, wherein the third intersection 311 is located between the dehumidification throttle adjustment device 230 and the outdoor heat exchanger 150; the air conditioner further includes a plurality of indoor units 200, and the plurality of indoor units 200 are connected in parallel to the first connection pipe 310, the second connection pipe 320, and the third connection pipe 330.

The plurality of indoor units can be used for cooling completely, or dehumidifying and reheating completely, or one part of indoor units can be used for cooling, and the other part of indoor units can be used for dehumidifying and reheating.

For example, referring to fig. 8, the air conditioner includes a first indoor unit and a second indoor unit, and both the first indoor unit and the second indoor unit may heat, dehumidify and reheat, or both the first indoor unit and the second indoor unit may cool, and the second indoor unit may dehumidify and reheat.

Specifically, referring to fig. d, when the second switching device 140 is switched to the third switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a portion of the high-temperature and high-pressure refrigerant flows into the first pipe 160, another portion of the high-temperature and high-pressure refrigerant flows into the third pipe 180 through the first branch pipe 112, and after the refrigerant flows through the indoor unit 200 and completes its operation, the refrigerant flows back into the compression mechanism 110 through the second pipe 170. The first reversing device 250 of the first indoor unit is switched to the first switching state, and the first reversing device 250 of the second indoor unit is switched to the second switching state, so that the first indoor unit can realize cooling, and the second indoor unit can realize dehumidification and reheating.

It should be noted that when the second switching device 140 is switched to the third switching state, at least two indoor units 200 of the plurality of indoor units 200 need to be turned on simultaneously, and at least one indoor unit 200 of the turned-on at least two indoor units 200 performs cooling or dehumidification reheating. That is, at least two indoor units 200 that are turned on cannot simultaneously heat. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a small portion of the refrigerant flows into the first pipe 160 to maintain the system balance, and the other portion of the refrigerant flows into the third pipe 180 through the first branch pipe 112; the heating indoor unit 200 receives the refrigerant from the third pipe 180, and the high-pressure liquid refrigerant formed by heating enters the first pipe 160, and then enters the cooling or dehumidifying and reheating indoor unit 200, and after being evaporated, cooled or dehumidified in the cooling or dehumidifying and reheating indoor unit 200, the refrigerant flows back to the compression mechanism 110 through the second pipe 170. Therefore, waste heat discharged into the atmosphere can be reduced, and waste heat utilization is realized, so that the energy consumption ratio is improved, and energy conservation and environmental protection are realized.

Of course, when the second switching device 140 is switched to the fourth switching state, all of the indoor units can be heated. For example, referring to fig. 9, the second switching device 140 is switched to the fourth switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a portion of the refrigerant flows into the second pipe 170, another portion of the refrigerant flows into the third pipe 180 through the first branch pipe 112, and after the refrigerant flows through the indoor unit 200 and is completely operated, the refrigerant flows back into the compression mechanism 110 through the first pipe 160. Wherein the first commutation device 250 of the first indoor unit switches to the first switching state; the first commutation device 250 of the second indoor unit switches to the second switching state; but is not limited thereto.

It is worth mentioning that the air conditioner can also realize the combination of three modes of refrigeration, heating and dehumidification reheating. For example, referring to fig. 2, the air conditioner includes a first indoor unit, a second indoor unit, and a third indoor unit, wherein the first indoor unit cools, the second indoor unit heats, and the third indoor unit dehumidifies and reheats. Specifically, the second commutation device 140 switches to a third switching state; the first direction changing device 250 of the first indoor unit is switched to the first switching state; the first commutation device 250 of the second indoor unit switches to the second switching state; the first commutation means 250 of the third intra-cell switches to the second switching state. In this embodiment, the refrigerant flowing out of the second room unit for heating must flow into the first room unit for cooling or the third room unit for dehumidification and reheating to exchange heat, and then flow back to the second pipe 170 and flow back to the compression mechanism 110 through the second pipe 170. In this embodiment, the refrigerant flowing out of the second room unit for heating must flow into the first room unit for cooling or the third room unit for dehumidification and reheating to exchange heat, and then flow back to the second pipe 170 and flow back to the compression mechanism 110 through the second pipe 170.

In some embodiments, to improve the ability of the air conditioner to heat at low temperatures, the air conditioner further comprises an economizer 190; the economizer 190 is provided in the first pipe 160 between the outdoor heat exchanger 150 and the first cross point 161, and a return pipe of the economizer 190 communicates with the medium-pressure suction port of the compression mechanism 110. The return pipe may have various forms, and the return pipe may include only a return pipe body, or may include a return pipe body and a first communication pipe, one end of the first communication pipe being communicated with the return pipe body, and the other end being communicated with the suction port of the compressor. The compression mechanism 110 in this case is a vapor-injection enthalpy compressor, and has a low-pressure suction port and an intermediate-pressure suction port.

The economizer 190 has a throttling function, a first refrigerant flow path and a second refrigerant flow path are arranged in the economizer 190, and two ends of the first refrigerant flow path are respectively communicated with the first piping 160 at two ends of the economizer 190; one end of the second refrigerant flow path is communicated with the first piping 160 through a liquid taking pipe 192, and the other end is communicated with the medium pressure suction port of the compressor through a return pipe; the liquid extraction pipe 192 is provided with a liquid extraction throttle valve 191. One end of the first refrigerant fluid is communicated with a refrigerant inlet of the economizer 190, and the other end is communicated with a refrigerant outlet of the economizer 190. The liquid-taking pipe 192 has one end communicating with the first pipe 160 and the other end communicating with the second refrigerant passage, and has one end communicating with the medium-pressure suction port of the compressor and the other end communicating with the second refrigerant passage.

Thus, the compressor discharge air respectively enters the reheating heat exchanger 220 and the dehumidifying heat exchanger 210 for heating, and the liquid refrigerant coming out of the reheating heat exchanger 220 and the dehumidifying heat exchanger 210 enters the economizer 190 and then is divided into two parts: the first part directly enters the outdoor heat exchanger 150 to evaporate and absorb heat after being throttled and reduced in pressure by the outdoor throttling adjusting device 120 (electronic expansion valve), the second part enters the economizer 190 to absorb heat and evaporate after being throttled and reduced in pressure by the liquid taking throttle valve 191 (electronic expansion valve), the evaporated medium-pressure saturated steam enters the medium-pressure air suction port of the compressor through the return pipe and is compressed together with the refrigerant of the low-pressure air suction port of the compressor after being mixed with the refrigerant, the problems of small refrigerant flow, low return air pressure, high compression ratio and the like in a low-temperature environment are solved, and the reliability of the low-temperature heating quantity and the system is improved. Through the utility model discloses a technique, when outdoor ambient temperature is low temperature, through the system design of jet enthalpy-increasing compressor and economic ware 190, increases the refrigerant air suction volume under the compressor low temperature environment, and then improves the low temperature heating volume, reduces the compression ratio under the low temperature environment simultaneously, can improve the reliability of system.

In other embodiments, in order to avoid the unpleasant noise generated when the refrigerant in the vapor-liquid two-phase state passes through the indoor throttling device, the air conditioner further includes a gas-liquid separator 130 and an economizer 190, wherein the gas-liquid separator 130 is disposed on the low-pressure suction pipe 113; the economizer 190 is provided in the first pipe 160 between the outdoor heat exchanger 150 and the first cross point 161, and a return pipe of the economizer 190 communicates with the gas-liquid separator 130. The return pipe may have various forms, and the return pipe may include only a return pipe body, or may include a return pipe body and a second communication pipe, one end of the second communication pipe is communicated with the return pipe body, and the other end is communicated with the gas-liquid separator 130.

In order to facilitate control, in some examples, a control valve is arranged on the return pipe or a communication pipe between the return pipe and a medium-pressure suction inlet of the compressor; the return pipe is communicated with the gas-liquid separator 130 through a low pressure suction pipe 113, and a control valve is provided on the return pipe or a connection pipe between the return pipe and the low pressure suction pipe 113.

The utility model discloses an adopt the system design who takes economizer 190 on the basis of three-pipe system dehumidification reheating scheme, through taking liquid choke valve 191 (electronic expansion valve) of getting in the economizer 190 system design return circuit in the control band, further reduce the refrigerant condensation temperature of the export of outdoor heat exchanger 150, improve the super-cooled rate, make the refrigerant complete condensation be liquid, liquid refrigerant gets into indoor heat exchanger heat absorption evaporation after indoor electronic expansion valve throttle step-down, when the refrigerant through indoor throttling arrangement is full liquid, can solve the refrigerant abnormal sound that the two-phase attitude of gas-liquid produced.

The high-pressure high-temperature gaseous refrigerant enters the outdoor heat exchanger 150 for condensation and heat exchange, and the gas-liquid two-phase medium-temperature high-pressure refrigerant coming out of the outdoor heat exchanger 150 enters the economizer 190 and then is divided into two parts: the first part is throttled and depressurized by a liquid taking throttle valve 191, then enters an economizer 190 through a liquid taking pipe 192 to absorb heat and evaporate, the evaporated gaseous refrigerant enters a gas-liquid separator 130 through a return pipe, a control valve (solenoid valve) and a connecting pipe, then is mixed with the gaseous refrigerant which is subjected to heat absorption and evaporation by an indoor heat exchanger, and then enters a compressor air suction port, the second part is further condensed and heat exchanged from the economizer 190, the gas-liquid two-phase refrigerant is changed into a pure liquid refrigerant, the pure liquid refrigerant flows indoors, and is throttled and depressurized by a dehumidification throttle valve and a reheating throttle valve and then respectively enters a dehumidification heat exchanger 210 and a reheating heat exchanger 220 to absorb heat and evaporate. The refrigerant entering the dehumidification regulating valve and the reheating regulating valve (electronic expansion valve) is changed into pure liquid from gas-liquid two-phase state, so that the problem of refrigerant abnormal sound generated when the gas-liquid two-phase refrigerant passes through the throttling device is solved.

In some embodiments, the air conditioner is also used to supply water to floor heating or to prepare domestic water for people.

When the air conditioner further comprises a floor heating module, the air conditioner further comprises a heat exchange water tank and a floor heating water flow pipe communicated with the heat exchange water tank; a floor heating heat exchanger is arranged in the heat exchange water tank, a refrigerant inlet of the floor heating heat exchanger is communicated with a third piping 180, a refrigerant outlet of the floor heating heat exchanger is communicated with the first piping 160, and a third control valve is arranged on the second piping 170.

Specifically, in this embodiment, ground heating water pipe can bury underground in the middle of ground or the wall, ground heating water pipe and heat exchange water tank intercommunication, and water among the heat exchange water tank can be at ground heating water pipe mesocycle for the temperature in the ground heating water pipe is equivalent with the temperature in the heat exchange water tank. When a high-temperature and high-pressure refrigerant passes through the floor heating heat exchanger, the floor heating heat exchanger exchanges heat with water in a heat exchange water tank to heat cold water in the water tank; when low-pressure refrigerant passes through the floor heating heat exchanger, the floor heating heat exchanger exchanges heat with water in the heat exchange water tank to cool the water in the heat exchange water tank. When the ground heating heat exchanger works, the third control valve can be selectively closed (closed when the ground heating is required to be efficiently heated), and at the moment, the outdoor unit 100 mainly serves the ground heating heat exchanger so as to improve the heat exchange efficiency of the ground heating heat exchanger.

In some other embodiments, the air conditioner further comprises: a first connection pipe 310 branched from a fifth intersection point of the first pipe 160, which is located between the dehumidification throttle control apparatus 230 and the outdoor heat exchanger 150, and a second connection pipe 320 branched from the second pipe 170; the air conditioner further includes a water treatment device including a water heat exchanger for heating or cooling water in the water container and a water container, the water heat exchanger being connected in parallel with the indoor unit 200 on the first connection pipe 310 and the second connection pipe 320. The water heat exchanger heats or refrigerates water in the water container, of course, the water containers can be multiple, and the water heat exchangers can also be multiple and arranged in parallel, so that one water container can contain hot water, and the other water container can contain cold water, and the cold water and the hot water can be supplied simultaneously. When hot water is required to be produced, high-temperature refrigerants pass through the water heat exchanger, so that heat energy is transferred to water in the container; when the refrigeration water is needed, the low-temperature refrigerant passes through the water heat exchanger, so that the cold energy is transferred to the water in the container.

In some other embodiments, the air conditioner further includes a third direction changing device 340, and the third direction changing device 340 is switchable between a fifth switching state and a sixth switching state, in the fifth switching state, the third direction changing device 340 makes the third pipe 180 communicate with the first branch pipe 112, and in the sixth switching state, the third direction changing device 340 makes the third pipe 180 communicate with the low pressure suction pipe 113.

Through the arrangement of the third reversing device 340, in the fifth switching state, the air conditioner is in a constant-temperature dehumidification state; in the sixth switching state, the air conditioner is in a cooling state, that is, the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 cool simultaneously. The third direction changing device 340 may be a four-way valve. Also connected to the third reversing device 340 is an auxiliary branch pipe 350, and when the third distribution pipe 180 communicates with the first branch pipe 112, the auxiliary branch pipe 350 communicates with the low pressure suction pipe 113; when the third pipe 180 communicates with the low pressure suction pipe 113, the auxiliary branch pipe 350 communicates the low pressure suction pipe 113 and the first branch pipe 112. The auxiliary branch pipe 350 is provided with a filter 351 and a capillary tube 352.

In some embodiments, the indoor unit further comprises electrically-assisted heat. Wherein the electrically-assisted heat is located between the dehumidifying heat exchanger 210 and the reheating heat exchanger 220; alternatively, the electric auxiliary heat is located at the side of the dehumidification heat exchanger 210 away from the reheat heat exchanger 220; alternatively, the electric auxiliary heat is located at the side of the reheating heat exchanger 220 away from the dehumidifying heat exchanger 210. Here, the specific location of the electric auxiliary heat is not limited. The auxiliary heating is carried out by arranging the electric auxiliary heat, so that the indoor temperature is not too low, and the use comfort of the air conditioner is improved. For example, when the dehumidification heat exchanger 210 or the reheating heat exchanger 220 is separately opened, the indoor temperature is low, and auxiliary heating can be performed through electric auxiliary heating at the moment, so that the indoor temperature is rapidly increased, and the experience comfort of a user is improved.

With respect to the above air conditioner, a control method of the air conditioner will be described in detail below. The method comprises the following steps:

s10, acquiring a mode instruction;

specifically, in this embodiment, there are various modes for acquiring the mode instruction, and the mode instruction may be acquired from an external terminal, such as a mobile phone, a remote controller, and the like; can also be obtained from other household electrical appliance equipment, such as an electric fan, an air purifier and the like; the calculation can also be carried out by detecting the self operating parameters or detecting the external environmental parameters, such as the indoor temperature; of course, the information can also be acquired from the cloud. The mode commands may include cooling, heating, dehumidification reheat, defrosting and non-sensible defrosting, user demand (e.g., temperature 15℃.), and the like.

And S20, adjusting the working state of the first reversing device 250 according to the mode command.

In this embodiment, the operating state of the first reversing device 250 is adjusted, so that the air conditioner can realize dehumidification and reheating, and also can realize refrigeration, thereby increasing the functions of the air conditioner and meeting the requirements of users.

For example, the mode command includes a cooling mode command, and the step of adjusting the operating state of the first reversing device 250 according to the mode command includes:

the first reversing device 250 is adjusted to the first switching state according to the cooling mode command.

Specifically, when the first switching device 250 is adjusted to the first switching state, both the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 cool, and when the air passes through the dehumidifying heat exchanger 210 and the reheating heat exchanger 220, the strong cooling can be realized.

For another example, the mode command includes a dehumidification and reheat mode command, and the step of adjusting the operating state of the first direction changing device 250 according to the mode command includes:

the first switching device 250 is adjusted to the second switching state according to the dehumidification-reheat mode command.

Specifically, when the first switching device 250 is adjusted to the second switching state, the air may first pass through the dehumidifying heat exchanger 210 and then pass through the reheating heat exchanger 220, the dehumidifying heat exchanger 210 cools, and the reheating heat exchanger 220 heats, so that dehumidification and reheating can be achieved.

It should be noted that, not generally, the control method of the air conditioner further includes adjusting the opening degrees of the dehumidification throttle control device 230 and the reheat throttle control device 240 according to the mode command. For example, the opening degrees of the dehumidification throttle control device 230 and the reheat throttle control device 240 are adjusted to be larger or smaller according to the mode command.

In some embodiments, the step of obtaining the mode instruction is further followed by:

and S30, adjusting the working state of the second reversing device 140 according to the mode command.

The outdoor unit 100 further comprises a second reversing device 140, the second reversing device 140 being switchable between a third switching state of the second reversing device 140 and a fourth switching state of the second reversing device 140,

in the fourth switching state, the second switching device 140 causes the discharge pipe 111 to communicate with the second pipe 170 and causes the low-pressure suction pipe 113 to communicate with the first pipe 160;

It should be noted that, by the arrangement of the first direction changing device 250 and the second direction changing device 140, not only the flow path of the refrigerant in the air conditioner can be changed, but also the air conditioner can realize various modes such as cooling, heating, dehumidifying and reheating.

The following is a description of the requirements of the different operating modes:

the mode command includes a cooling mode command, and the step of adjusting the working states of the first reversing device 250 and the second reversing device 140 according to the mode command includes:

the first switching device 250 is adjusted to the first switching state and the second switching device 140 is adjusted to the third switching state according to the cooling mode command.

In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the dehumidification throttle control device 230 and the reheat throttle control device 240, enters the dehumidification heat exchanger 210 and the reheat heat exchanger 220 to be cooled, finally merges and flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. The dehumidifying heat exchanger 210 and the reheating heat exchanger 220 both cool, so that strong cooling can be achieved.

Alternatively, the step of adjusting the opening degrees of the working states of the first and second reversing

devices

250 and 140 according to the mode command includes:

adjusting the first reversing device 250 to a first switching state and the second reversing device 140 to a third switching state according to a refrigeration mode instruction;

adjusting the opening degree of the reheat throttle adjusting means 240 to zero;

in this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160, the outdoor heat exchanger 150, is throttled by the dehumidification throttle control device 230, enters the dehumidification heat exchanger 210 to be cooled, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. Only the dehumidifying heat exchanger 210 performs refrigeration, and normal refrigeration can be realized.

devices

250 and 140 according to the mode command includes:

the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero.

In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, passes through the first pipe 160, the outdoor heat exchanger 150, is throttled by the reheat throttle control device 240, enters the reheat heat exchanger 220 to be cooled, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. Only the reheat heat exchanger 220 is used for refrigerating, and common refrigerating can be realized.

The mode command includes a heating mode command, and the step of adjusting the working states of the first commutation device 250 and the second commutation device 140 according to the mode command includes:

adjusting the first switching state of the first reversing device 250 and the fourth switching state of the second reversing device 140 according to the heating mode command;

in this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the reheat heat exchanger 220 and the dehumidification heat exchanger 210 through the second pipe 170, heats, finally merges the two refrigerant portions, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidification heat exchanger 210 and the reheat heat exchanger 220 generate heat.

Or, the first switching device 250 is adjusted to the second switching state according to the heating mode command, and the second switching device 140 is adjusted to the fourth switching state.

In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, and a part of the refrigerant flows into the third pipe 180 through the first branch pipe 112 and flows into the reheat heat exchanger 220 to perform heating; the other part flows into the dehumidifying heat exchanger 210 through the second pipe 170 to perform heating, and the last two parts join together and flow into the first pipe 160, and flow back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidification heat exchanger 210 and the reheat heat exchanger 220 generate heat.

Alternatively, the step of adjusting the working states of the first and second reversing

devices

250 and 140 according to the mode command includes:

adjusting the first switching device 250 to a second switching state according to the heating mode command, and adjusting the second switching device 140 to a fourth switching state;

in this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidifying heat exchanger 210 through the second pipe 170, heats, finally flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode, in which only the dehumidifying heat exchanger 210 heats.

devices

250 and 140 according to the mode command includes:

In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to be heated, finally flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode, and in this mode, only the reheat heat exchanger 220 heats.

devices

250 and 140 according to the mode command includes:

devices

250 and 140 according to the mode command includes:

In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the reheat heat exchanger 220 through the second pipe 170 to be heated, finally flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode, and in this mode, only the reheat heat exchanger 220 heats.

The mode command comprises a dehumidification and reheat mode command, and the step of adjusting the working states of the first reversing device 250 and the second reversing device 140 according to the mode command comprises the following steps:

the first switching device 250 is adjusted to the second switching state and the second switching device 140 is adjusted to the third switching state according to the dehumidification and reheat mode command.

In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the high-temperature and high-pressure refrigerant flows into the first pipe 160, the other part of the high-temperature and high-pressure refrigerant flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to reheat and dehumidify the air, is throttled by the reheat throttle control device 240 to form a high-pressure refrigerant, and the high-pressure refrigerant joins the refrigerant in the first pipe 160, flows into the dehumidification heat exchanger 210 to evaporate and dehumidify the air, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170.

In addition, when a user needs to defrost the outdoor heat exchanger 150, the defrosting mode includes two conditions, one is common powerful defrosting, in this mode, both the dehumidification heat exchanger 210 and the reheating heat exchanger 220 refrigerate, and the outdoor heat exchanger 150 heats; the other mode is no sensible frost, in this mode, the dehumidifying heat exchanger 210 refrigerates, the reheating heat exchanger 220 heats, and the outdoor heat exchanger 150 heats.

Normally and strongly defrosting, wherein the mode command comprises a defrosting mode command, and the step of adjusting the working states of the first reversing device 250 and the second reversing device 140 according to the mode command comprises the following steps:

adjusting the first switching state of the first reversing device 250 and the third switching state of the second reversing device 140 according to the defrosting mode command;

by setting the dehumidification heat exchanger 210 and the reheat heat exchanger 220 to both cool, the outdoor heat exchanger 150 heats strongly, so that defrosting of the outdoor heat exchanger 150 can be performed quickly.

The method comprises the following steps of performing non-inductive defrosting, wherein the mode command comprises a defrosting mode command, and the step of adjusting the working states of the first reversing device 250 and the second reversing device 140 according to the mode command comprises the following steps:

the first switching means 250 is adjusted to the second switching state and the second switching means 140 is adjusted to the third switching state according to the defrost mode command.

The dehumidification heat exchanger 210 cools the air, and the reheat heat exchanger 220 and the outdoor heat exchanger 150 heat the air, so that the outdoor unit is defrosted when a user does not perceive the air.

A control method of an air conditioner provided with a plurality of indoor units 200 will be described.

The air conditioner comprises a plurality of indoor units 200, for example, two, three or more indoor units 200, and the heat exchanger types of the indoor units 200 may be different, for example, one or more of an indoor unit with a constant temperature dehumidification function (having both a dehumidification heat exchanger 210 and a reheat heat exchanger 220, a common refrigeration/heating indoor unit (having only one heat exchanger and a corresponding throttling adjustment device), and an indoor unit with a reversing device capable of freely switching a refrigeration state or a heating state may be included, so that the air conditioner may perform a hybrid operation of refrigeration, heating, dehumidification and reheat.

For example, in some embodiments, the air conditioner includes a first indoor unit and a second indoor unit, the obtaining the mode command; the step of adjusting the operating state of the first commutation means 250 according to the mode command comprises:

acquiring a first mode instruction of a first indoor unit, and acquiring a second mode instruction of a second indoor unit;

the operating state of the first reversing device 250 of the first indoor unit is adjusted according to the first mode command, and the operating state of the first reversing device 250 of the second indoor unit is adjusted according to the second mode command.

The first mode command and the second mode command may include cooling, heating, dehumidification reheating, defrosting and non-sensible defrosting, user demand, and the like. The mode of acquiring the first mode instruction and the second mode instruction is various, and the instructions sent by an external terminal, such as a mobile phone, a remote controller and the like, can be acquired; can also be obtained from other household electrical appliance equipment, such as an electric fan, an air purifier and the like; the calculation can also be carried out by detecting the self operating parameters or detecting the external environmental parameters, such as the indoor temperature; of course, the information can also be acquired from the cloud.

The following is a description of the requirements of different combinations of operating modes:

the first mode command comprises a cooling mode command, the second mode command comprises a dehumidification and reheat mode command, and the step of adjusting the working state of the first reversing device 250 of the first indoor unit according to the first mode command and the step of adjusting the working state of the first reversing device 250 of the second indoor unit according to the second mode command comprises the steps of:

adjusting the first reversing device 250 of the first indoor unit to a first switching state according to the cooling mode command; the first direction changing device 250 of the second indoor unit is adjusted to the second switching state according to the dehumidification reheat mode command.

In this embodiment, the dehumidification heat exchanger 210 and the reheat heat exchanger 220 of the first indoor unit both cool, and the air can be cooled after passing through the dehumidification heat exchanger 210 and the reheat heat exchanger 220; the dehumidifying heat exchanger 210 of the second indoor unit cools and the reheating heat exchanger 220 of the second indoor unit heats, so that the air exchanges heat with the dehumidifying heat exchanger 210 and then exchanges heat with the reheating heat exchanger 220, and dehumidification and reheating can be realized.

The first mode command includes a heating mode command, the second mode command is a dehumidification and reheat mode command, and the adjusting the working state of the first reversing device 250 of the first indoor unit according to the first mode command and the adjusting the working state of the first reversing device 250 of the second indoor unit according to the second mode command includes:

adjusting the first reversing device 250 of the first indoor unit to a second switching state according to the heating mode command, and adjusting the opening degree of the dehumidification throttling adjustment device 230 of the first indoor unit to zero; the first direction changing device 250 of the second indoor unit is adjusted to the second switching state according to the dehumidification reheat mode command.

In this embodiment, the dehumidification heat exchanger 210 and the reheat heat exchanger 220 of the first indoor unit both heat, and after the air passes through the dehumidification heat exchanger 210 and the reheat heat exchanger 220, the heating can be realized; the dehumidifying heat exchanger 210 of the second indoor unit cools and the reheating heat exchanger 220 of the second indoor unit heats, so that the air exchanges heat with the dehumidifying heat exchanger 210 and then exchanges heat with the reheating heat exchanger 220, and dehumidification and reheating can be realized.

The first mode command includes a heating mode command, the second mode command is a cooling mode command, and the adjusting the working state of the first reversing device 250 of the first indoor unit according to the first mode command and the adjusting the working state of the first reversing device 250 of the second indoor unit according to the second mode command includes:

adjusting the first reversing device 250 of the first indoor unit to a second switching state according to the heating mode command, and adjusting the opening degree of the dehumidification throttling adjustment device 230 of the first indoor unit to zero; the first direction changing device 250 of the second indoor unit is adjusted to the first switching state according to the dehumidification reheat mode command.

In this embodiment, the dehumidification heat exchanger 210 and the reheat heat exchanger 220 of the first indoor unit both heat, and after the air passes through the dehumidification heat exchanger 210 and the reheat heat exchanger 220, the heating can be realized; the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 of the second indoor unit both perform cooling, and the cooling of the air can be achieved after the air passes through the dehumidifying heat exchanger 210 and the reheating heat exchanger 220.

Of course, it is also possible that the first mode command includes a first heating mode command, the second mode command includes a second heating mode command, the adjusting the operating state of the first reversing device 250 of the first indoor unit according to the first mode command includes:

the first switching state of the first switching device 250 of the first indoor unit is adjusted according to the first heating mode command, and the second switching state of the first switching device 250 of the second indoor unit is adjusted according to the second heating mode command.

In this embodiment, the second switching device 140 needs to be adjusted to the fourth switching state.

It is worth mentioning that the air conditioner can also realize the combination of three modes of refrigeration, heating and dehumidification reheating. For example, the air conditioner includes a first indoor unit, a second indoor unit, and a third indoor unit, and the mode command is acquired; the step of adjusting the operating state of the first commutation means 250 according to the mode command comprises:

acquiring a first mode instruction of a first indoor unit, acquiring a second mode instruction of a second indoor unit, and acquiring a third instruction of a third indoor unit;

adjusting the working state of the first reversing device 250 of the first indoor unit according to the first mode instruction, adjusting the working state of the first reversing device 250 of the second indoor unit according to the second mode instruction, and adjusting the working state of the first reversing device 250 of the third indoor unit according to the third mode instruction;

the first mode command comprises a cooling mode command, the second mode command comprises a heating mode command, and the third mode command comprises a dehumidification and reheat mode command.

Specifically, the first switching device 250 of the first indoor unit is adjusted to the first switching state according to the first mode command; adjusting the first reversing device 250 of the second indoor unit to a second switching state according to the second mode command, and adjusting the opening degree of the dehumidification throttling adjustment device 230 to zero; and adjusting the first reversing device 250 of the third indoor unit to be in the second switching state according to the third mode command.

So for the air conditioner can realize the mixture of refrigeration, heating, dehumidification reheat multiple mode, thereby further increased the function of air conditioner, improved the adaptability of air conditioner, can satisfy user's demand better.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air conditioner is characterized by comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compression mechanism, an outdoor heat exchanger and an outdoor throttling adjusting device, and the indoor unit comprises a dehumidifying heat exchanger and a dehumidifying throttling adjusting device;

2. The air conditioner according to claim 1, wherein the outdoor unit further comprises a second direction changing device having a third switching state and a fourth switching state,

3. The air conditioner according to claim 1, wherein the first direction changing means is a three-way valve or a four-way valve having one closed end.

4. The air conditioner according to claim 1, wherein said first reversing device includes a first control valve, a second control valve, and said third piping connects a first intersection of said first piping, said reheat throttle adjusting device, said reheat heat exchanger, said first control valve, and said first branch pipe in this order;

5. The air conditioner as claimed in claim 1, wherein said dehumidifying throttle adjusting means comprises a dehumidifying throttle valve, and said reheating throttle adjusting means comprises a reheating throttle valve.

6. The air conditioner according to claim 1, wherein the heat cycle device is an air blowing device, and the dehumidifying heat exchanger and the reheating heat exchanger are provided in an airflow path formed by the air blowing device.

7. The air conditioner according to claim 1, further comprising a first connection pipe branched from a third intersection of the first pipe, a second connection pipe branched from the second pipe, and a third connection pipe branched from the third pipe, the third intersection being located between the dehumidifying throttle device and the outdoor heat exchanger;

8. The air conditioner as claimed in claim 1, further comprising a heat exchange water tank and a ground heating water flow pipe communicated with the heat exchange water tank;

9. The air conditioner of claim 1, further comprising an economizer; the economizer is disposed on a first pipe between the outdoor heat exchanger and a first junction, and a return pipe of the economizer communicates with a medium-pressure suction port of the compression mechanism.

10. The air conditioner according to claim 1, further comprising a gas-liquid separator provided on the low pressure suction pipe and an economizer; the economizer is disposed on a first pipe between the outdoor heat exchanger and the first intersection, and a return pipe of the economizer is communicated with the gas-liquid separator.