CN210832268U

CN210832268U - Air conditioner indoor unit and air conditioner

Info

Publication number: CN210832268U
Application number: CN201921837687.9U
Authority: CN
Inventors: 雷俊杰; 张�浩; 黎顺全
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: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-06-23
Anticipated expiration: 2029-10-28

Abstract

The utility model discloses an indoor unit of air conditioner and air conditioner, wherein, include: the switching device is communicated with the second through port through a first communicating pipe, communicated with the fourth through port through a second communicating pipe, communicated with a second pipe of the air conditioner through a third communicating pipe and communicated with a third pipe of the air conditioner through a fourth communicating pipe; the switching means causes the second passage to be configured to communicate with the third piping and/or to communicate with the second piping; and/or, the switching device causes the fourth port to be configured to communicate with the third piping and/or to communicate with the second piping; the air conditioner comprises a compressor, an outdoor heat exchanger, a discharge pipe, a suction pipe and a first pipe, wherein the second pipe is configured to connect the suction pipe and the indoor heat exchanger; the third pipe is configured to connect the discharge pipe and the indoor heat exchanger. The utility model discloses technical scheme improves air conditioner adaptability.

Description

Air conditioner indoor unit and air conditioner

Technical Field

The utility model relates to an air conditioning technology field, in particular to machine and air conditioner in air conditioning.

Background

Along with the improvement of living standard of people, people are more and more common to the use of air conditioner, and simultaneously, people also put forward higher demand to the air conditioner. The existing indoor unit of the air conditioner has the advantages that due to the fixed arrangement of the indoor heat exchangers, the working conditions among the indoor heat exchangers are inflexible, the indoor unit of the air conditioner is not beneficial to the realization of multiple working modes of the air conditioner, and the requirements of different people can not be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an indoor unit of air conditioner aims at improving the adaptability of air conditioner.

In order to achieve the above object, the utility model provides an indoor unit of air conditioner, include:

the first indoor heat exchanger is provided with a first through port and a second through port for allowing refrigerant to enter or flow out, and the first through port is configured to be communicated with a first pipe of the air conditioner;

the second indoor heat exchanger is provided with a third through hole and a fourth through hole for allowing refrigerant to enter or flow out of the second indoor heat exchanger, and the third through hole is configured to be communicated with a first pipe of the air conditioner;

the switching device is communicated with the second through port through a first communication pipe, communicated with the fourth through port through a second communication pipe, communicated with a second pipe of the air conditioner through a third communication pipe and communicated with a third pipe of the air conditioner through a fourth communication pipe;

the switching device causes the second passage to be configured to communicate with the third piping and/or to communicate with the second piping; and/or, the switching device causes the fourth port to be configured to communicate with the third piping and/or to communicate with the second piping;

the air conditioner comprises a compressor, an outdoor heat exchanger, a discharge pipe connected with the discharge side of the compressor, and a suction pipe connected with a low-pressure suction inlet of the compressor;

a first piping configured to connect a discharge pipe, an outdoor heat exchanger, and one or more indoor heat exchangers of the indoor unit of the air conditioner in this order; a second pipe configured to connect the suction pipe and the indoor heat exchanger;

the third pipe is configured to connect the discharge pipe and the indoor heat exchanger.

Optionally, the switching device includes:

the first connecting pipe is communicated with a first communicating pipe and a third communicating pipe, and a first control valve is arranged on the first connecting pipe;

and the second connecting pipe is communicated with the first communicating pipe and the fourth communicating pipe, and a second control valve is arranged on the second connecting pipe.

Optionally, the switching device includes:

the first connecting pipe is communicated with the first communicating pipe and the third communicating pipe;

the second connecting pipe is communicated with the first communicating pipe and the fourth communicating pipe;

and a first three-way valve is arranged at the joint of the first connecting pipe, the second connecting pipe and the first connecting pipe so as to control the first connecting pipe to be communicated with the first connecting pipe and/or the second connecting pipe.

Optionally, the switching device includes:

the third connecting pipe is communicated with the second communicating pipe and the third communicating pipe, and a third control valve is arranged on the third connecting pipe;

and the fourth connecting pipe is communicated with the second communicating pipe and the fourth communicating pipe, and a fourth control valve is arranged on the fourth connecting pipe.

Optionally, the switching device includes:

the third connecting pipe is communicated with the second communicating pipe and the third communicating pipe;

the fourth connecting pipe is communicated with the second communicating pipe and the fourth communicating pipe;

and a second three-way valve is arranged at the joint of the third connecting pipe, the fourth connecting pipe and the second communicating pipe so as to control the first communicating pipe to be communicated with the first connecting pipe and/or the second connecting pipe.

Optionally, the switching device includes:

and a third three-way valve is arranged at the joint of the first connecting pipe, the third connecting pipe and the third communicating pipe so as to control the third communicating pipe to be communicated with the first connecting pipe and/or the third connecting pipe.

Optionally, the switching device includes:

and a fourth three-way valve is arranged at the joint of the second connecting pipe, the fourth connecting pipe and the fourth communicating pipe so as to control the fourth communicating pipe to be communicated with the second connecting pipe and/or the fourth connecting pipe.

Optionally, the first through opening is communicated with a first pipe of the air conditioner through a first refrigerant pipe, and a first indoor throttling device is arranged on the first refrigerant pipe;

and/or the third through opening is communicated with a first pipe of the air conditioner through a second refrigerant pipe, and a second indoor throttling device is arranged on the second refrigerant pipe.

Optionally, the first refrigerant pipe and the second refrigerant pipe are communicated with each other and then communicated with the first pipe through a fifth communication pipe.

The utility model discloses a further provide an air conditioner, include:

an air-conditioning indoor unit;

the outdoor unit of the air conditioner comprises a compression mechanism and an outdoor heat exchanger;

a discharge pipe connected to a discharge side of the compression mechanism, a suction pipe connected to a suction side of the compression mechanism, and a first pipe connecting the discharge pipe, an outdoor heat exchanger, and one or more indoor heat exchangers of the indoor unit of the air conditioner in this order;

a second pipe connecting the one or more indoor heat exchangers and the suction pipe; and the number of the first and second groups,

a third pipe connecting the one or more indoor heat exchangers and the discharge pipe;

wherein, machine in the air conditioning includes:

the switching device causes the second passage to be configured to communicate with the third piping and/or to communicate with the second piping; and/or the switching device enables the fourth through port to be communicated with the third piping and/or the second piping.

Optionally, the air conditioner further comprises a first switch switchable between a first switch first switching state and a first switch second switching state;

in the first switching state, the first switch communicates the first pipe with the suction pipe and communicates the second pipe with the discharge pipe;

in the second switching state, the first switch communicates the first pipe with the discharge pipe and communicates the second pipe with the suction pipe.

Optionally, the number of the air-conditioning indoor units is plural, and the plural air-conditioning indoor units are connected in parallel to the first pipe, the second pipe, and the third pipe.

Optionally, the outdoor unit of the air conditioner further comprises an economizer; the economizer is arranged on a first pipe between the outdoor heat exchanger and the indoor unit of the air conditioner, and a return pipe of the economizer is communicated with a medium-pressure suction inlet of the compressor.

Optionally, a first refrigerant flow path and a second refrigerant flow path are arranged in the economizer, and two ends of the first refrigerant flow path are respectively communicated with first pipes at two ends of the economizer; one end of the second refrigerant flow path is communicated with the first pipe through a liquid taking pipe, and the other end of the second refrigerant flow path is communicated with a medium-pressure suction inlet of the compressor through a return pipe; and a liquid taking throttle valve is arranged on the liquid taking pipe.

Optionally, the inflow end of the liquid taking pipe is communicated with a first pipe between the economizer and the outdoor side heat exchanger, or,

and the inflow end of the liquid taking pipe is communicated with a first pipe between the economizer and the first indoor throttling device.

Optionally, the return pipe comprises a return pipe body, a first conducting pipe and a second conducting pipe;

one end of the first communicating pipe is communicated with the muffler body, and the other end of the first communicating pipe is communicated with a medium-pressure suction inlet of the compressor; a fifth control valve is arranged on the return pipe body or the first return pipe;

one end of the second conduction pipe is communicated with the muffler body, the other end of the second conduction pipe is communicated with the suction pipe, and a sixth control valve is arranged on the second conduction pipe.

In the technical scheme of the utility model, under the effect of the switching device, the second gap and the fourth gap can have different communication modes, thereby realizing different working states (refrigeration or heating), when the first tube is connected with the discharge tube, the outdoor heat exchanger and the first gap of the first indoor heat exchanger in sequence, and the second tube is connected with the suction tube and the second gap of the first indoor heat exchanger, the first indoor heat exchanger is refrigerated; when the first piping connects the discharge pipe, the outdoor heat exchanger, and the fourth port of the second indoor heat exchanger in this order, and the second piping connects the suction pipe and the third port of the second indoor heat exchanger, the second indoor heat exchanger heats. Therefore, the air passes through the first refrigerating indoor heat exchanger and the second heating indoor heat exchanger, so that the indoor unit of the air conditioner realizes dehumidification and reheating; when the first indoor heat exchanger refrigerates and the second heat exchanger refrigerates, the indoor unit of the air conditioner realizes refrigeration; the air-conditioning indoor unit can realize dehumidification and reheating to deal with the damp 'return south' and can meet the refrigeration requirement of a user; the effects of refrigeration and dehumidification reheating of the indoor heat exchanger can be more finely adjusted, so that the air conditioner can be suitable for more occasions, the requirements of different people are met, and the improvement of the adaptability of the air conditioner is facilitated.

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 another embodiment of the air conditioner of the present invention;

fig. 4 is a schematic diagram of an internal structure of an embodiment of an economizer of the air conditioner of the present invention.

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 all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention 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 indicator is changed accordingly.

The utility model mainly provides an air-conditioning indoor unit, mainly be applied to in the air conditioner to make air-conditioning indoor unit including a plurality of indoor heat exchangers side by side, indoor heat exchanger's heat transfer total area can be adjusted as required, in order to satisfy different operating mode demands.

The specific structure of the air conditioning indoor unit 200 will be mainly described below.

Referring to fig. 1 to 4, in an embodiment of the present invention, the indoor unit 200 of an air conditioner includes two indoor heat exchangers, i.e., a first indoor heat exchanger 210 and a second indoor heat exchanger 220, wherein,

the first indoor heat exchanger 210 has a first through port 211 and a second through port 212 for allowing the refrigerant to enter or exit the first indoor heat exchanger 210, the first through port 211 is configured to communicate with the first pipe 140 of the air conditioner, and the second through port 212 is configured to communicate with the third pipe 160 of the air conditioner and/or configured to communicate with the second pipe 150 of the air conditioner;

the second indoor heat exchanger 220 has a third through hole 221 and a fourth through hole 222 for allowing the refrigerant to enter or exit the second indoor heat exchanger 220, the third through hole 221 is configured to communicate with the first pipe 140 of the air conditioner, and the fourth through hole 222 is configured to communicate with the third pipe 160 of the air conditioner and/or configured to communicate with the second pipe 150 of the air conditioner; the third through port 221 is communicated with the first pipe 140 of the air conditioner through a second refrigerant pipe 223, and a second indoor throttling device is arranged on the second refrigerant pipe 223;

a switching device that communicates with the second port 212 via the first communication pipe 214, communicates with the fourth port 222 via the second communication pipe 224, communicates with the second piping 150 of the air conditioner via the third communication pipe 219, and communicates with the third piping 160 of the air conditioner via the fourth communication pipe 229;

the switching means causes the second passage port 212 to be configured to communicate with the third piping 160 or to communicate with the second piping 150; and/or, the switching device causes the fourth port 222 to be configured to communicate with the third piping 160 or to communicate with the second piping 150;

the air conditioner comprises a compressor 110, an outdoor heat exchanger 141, a discharge pipe 111 connected with the discharge side of the compressor 110, and a suction pipe 113 connected with the low-pressure suction port of the compressor 110;

the first pipe 140 is configured to connect the discharge pipe 111, the outdoor heat exchanger 141, and the indoor heat exchanger of the indoor unit 200 of the air conditioner in this order;

the second pipe 150 is configured to connect the suction pipe 113 and the indoor heat exchanger;

third pipe 160 is disposed to connect discharge pipe 111 and the indoor heat exchanger.

Specifically, in the present embodiment, the air conditioning indoor unit 200 includes a plurality of indoor heat exchangers, and two of them are taken as an example for description. There may be many forms of switching means for switching whether the second port 212 communicates with the second pipe 150, the third pipe 160, or both the second pipe 150 and the third pipe 160; at the same time, the fourth port 222 may be used to switch between communication with the second pipe 150 and communication with the third pipe 160 and between communication with the second pipe 150 and the third pipe 160. The switching device is connected to a main control board of the indoor unit 200 of the air conditioner, and switches the communication between the second opening 212 and the fourth opening as required, thereby implementing different working states of the first indoor heat exchanger 210 and the second indoor heat exchanger 220. In some embodiments, the switching device may have a cartridge for loading, securing and protecting the tubing, control valves, etc.

The first inlet 211 of the first indoor heat exchanger 210 communicates with the first pipe 140 of the air conditioner, and the second inlet 212 communicates with the third pipe 160 or the second pipe 150. When the refrigerant enters the first indoor heat exchanger 210 from the first outlet 211 and flows out of the first indoor heat exchanger 210 from the second outlet 212, the first indoor heat exchanger 210 performs cooling (in some embodiments of the multi-split air conditioner, heating may also be performed, and may be achieved by adjusting a throttling device); when the refrigerant enters the first indoor heat exchanger 210 through the second outlet 212 and flows out of the first indoor heat exchanger 210 through the first outlet 211, the first indoor heat exchanger 210 heats.

Specifically, when the first indoor heat exchanger 210 cools, the refrigerant flows from the compressor 110, passes through the outdoor heat exchanger 141 under the guidance of the first pipe 140, enters the first indoor heat exchanger 210 through the first port 211, flows out of the first indoor heat exchanger 210 through the second port 212, flows back to the gas-liquid separator or the suction pipe through the second pipe 150, and then flows back to the compressor 110. When the first indoor heat exchanger 210 performs heating, the refrigerant flows in two ways, the first being discharged from the compressor 110, then enters the second pipe 150 through the discharge pipe 111, enters the first indoor heat exchanger 210 through the second opening 212, then flows out of the first indoor heat exchanger 210 through the first opening 211, flows into the outdoor heat exchanger 141 through the first pipe 140, flows into the suction pipe through the first pipe 140 after passing through the outdoor heat exchanger 141 (in this case, the first pipe 140 communicates with the suction pipe 113, and the second pipe 150 communicates with the discharge pipe 111), and flows back to the compressor 110. The second is that the refrigerant flows out from the compressor 110, flows into the third pipe 160 through the discharge pipe, enters the first indoor heat exchanger 210 through the second port 212, flows out of the first indoor heat exchanger 210 through the first port 211, flows into the outdoor heat exchanger 141 through the first pipe 140, flows into the suction pipe through the first pipe 140 after passing through the outdoor heat exchanger 141 (in this case, the first pipe 140 communicates with the suction pipe 113, and the second pipe 150 communicates with the discharge pipe 111), and flows back to the compressor 110. In some embodiments, the first and second modes may occur at the same time in the same heat exchanger in order to meet specific requirements.

Similarly, the third port 221 of the second indoor heat exchanger 220 communicates with the first pipe 140 of the air conditioner, and the fourth port 222 communicates with the third pipe 160 or the second pipe 150. When the refrigerant enters the second indoor heat exchanger 220 through the third port 221 and exits the second indoor heat exchanger 220 through the fourth port 222,

the second indoor heat exchanger 220 performs cooling (or heating in some embodiments of the multi-split air conditioner, which may be achieved by adjusting the throttling device); when the refrigerant enters the second indoor heat exchanger 220 through the fourth outlet 222 and flows out of the second indoor heat exchanger 220 through the third outlet 221, the second indoor heat exchanger 220 heats.

Specifically, when the second indoor heat exchanger 220 cools, the refrigerant flows from the compressor 110, passes through the outdoor heat exchanger 141 under the guidance of the first pipe 140, enters the second indoor heat exchanger 220 through the third port 221, flows out of the second indoor heat exchanger 220 through the fourth port 222, flows back to the gas-liquid separator or the suction pipe through the second pipe 150, and flows back to the compressor 110. When the second indoor heat exchanger 220 performs heating, the refrigerant flows in two ways, the first being after being discharged from the compressor 110, through the discharge pipe 111, into the second pipe 150, through the fourth port 222 into the second indoor heat exchanger 220, through the third port 221, out of the second indoor heat exchanger 220, through the first pipe 140, into the outdoor heat exchanger 141, through the outdoor heat exchanger 141, into the suction pipe through the first pipe 140 (in this case, the first pipe 140 communicates with the suction pipe 113, and the second pipe 150 communicates with the discharge pipe 111), and flows back to the compressor 110. In the second type, the refrigerant flows out from the compressor 110, flows into the third pipe 160 through the discharge pipe, enters the second indoor heat exchanger 220 through the fourth port 222, flows out of the second indoor heat exchanger 220 through the third port 221, flows into the outdoor heat exchanger 141 through the first pipe 140, flows into the suction pipe through the outdoor heat exchanger 141, and flows back to the compressor 110 through the first pipe 140. The opening and closing of the second indoor throttling device controls whether the second indoor heat exchanger 220 participates in the work. In some embodiments, the first and second modes may occur at the same time in the same heat exchanger in order to meet specific requirements.

In this way, under the action of the switching device, the second inlet 212 and the fourth inlet 222 may have different communication modes to realize different working states (cooling or heating), and when the discharge pipe 111, the outdoor heat exchanger 141 and the first inlet 211 of the first indoor heat exchanger 210 are connected in sequence to the first pipe 140 and the suction pipe 113 and the second inlet 212 of the first indoor heat exchanger 210 are connected to the second pipe 150, the first indoor heat exchanger 210 cools; when the discharge pipe 111, the outdoor heat exchanger 141, and the fourth port 222 of the second indoor heat exchanger 220 are connected in this order to the first pipe 140, and the suction pipe 113 and the third port 221 of the second indoor heat exchanger 220 are connected to the second pipe 150, the second indoor heat exchanger 220 heats. Thus, the air passes through the first indoor heat exchanger 210 for cooling and then passes through the second indoor heat exchanger 220 for heating, so that the indoor unit 200 of the air conditioner realizes dehumidification and reheating; when the first indoor heat exchanger 210 refrigerates and the second heat exchanger refrigerates, the indoor unit 200 of the air conditioner realizes refrigeration; the air-conditioning indoor unit 200 can realize dehumidification and reheating to cope with humid 'return south' and can meet the refrigeration requirement of a user; the effects of refrigeration and dehumidification reheating of the indoor heat exchanger can be more finely adjusted, so that the air conditioner can be suitable for more occasions, the requirements of different people are met, and the improvement of the adaptability of the air conditioner is facilitated.

In some embodiments, in order to achieve efficient cooling or heating of the first indoor heat exchanger 210 and the second indoor heat exchanger 220, the first through-port 211 is communicated with the first pipe 140 of the air conditioner through a first refrigerant pipe 213, and a first indoor throttling device is disposed on the first refrigerant pipe 213; and/or the third through port 221 is communicated with the first pipe 140 of the air conditioner through a second refrigerant pipe 223, and the second refrigerant pipe 223 is provided with a second indoor throttling device. By providing the first indoor throttling device on the first refrigerant pipe 213, the first indoor heat exchanger 210 may be in a non-operating state, and a position of an operating indoor heat exchanger among the plurality of indoor heat exchangers may be arbitrarily selected as required. The throttle device may be a capillary tube or a throttle valve, and takes an electronic expansion valve as an example.

For controlling the opening and closing of the first refrigerant pipe 213 and the second refrigerant pipe 223, a dedicated control valve may be provided in addition to the first throttle device 230 and the second indoor throttle device for adjusting the flow rate. In other embodiments, the first refrigerant pipe 213 and the second refrigerant may be communicated with each other and then communicated with the first pipe 140. Specifically, the first refrigerant pipe 213 and the second refrigerant pipe 223 communicate with the first pipe 140 through the fifth communication pipe 258. The first communicating pipe and the second communicating pipe may be communicated with each other and then communicated with the fifth communicating pipe 258, or both may be directly communicated with the fifth communicating pipe 258. Therefore, the length of the refrigerant pipe can be reduced, the cost is saved, and the space is reasonably utilized.

Regarding the switching device, the switching device includes a first connection pipe 215 connecting the first connection pipe 214 and the third connection pipe 219, a second connection pipe 216 connecting the first connection pipe 214 and the fourth connection pipe 229, a third connection pipe 225 connecting the second connection pipe 224 and the third connection pipe 219, and a fourth connection pipe 226 connecting the second connection pipe 224 and the fourth connection pipe 229. When the second port 212 connects the third pipe 160 and the second pipe 150 at the same time and the fourth port 222 connects the third pipe 160 and the second pipe 150 at the same time, there are various ways of opening and closing the first connection pipe 215 to the fourth connection pipe 226, for example, a two-way control valve may be provided, or a three-way valve may be provided, which will be described below.

The two-way control valve is used for realizing the following modes:

the switching device includes:

a first connection pipe 215, the first connection pipe 215 connecting a first connection pipe 214 and a third connection pipe 219, the first connection pipe 215 being provided with a first control valve 217; and a second connection pipe 216, wherein the second connection pipe 216 connects the first connection pipe 214 and the fourth connection pipe 229, and a second control valve 218 is disposed on the second connection pipe 216.

The first connection pipe 215 is provided with a first control valve 217; a second control valve 218 is provided on the second connection pipe 216. In this way, the second port 212 can selectively communicate with the third pipe 160 or the second pipe 150, so that the operating state of the first indoor heat exchanger 210 can be arbitrarily adjusted according to the requirement, and is not affected by the operating modes of other indoor heat exchangers. For example, when the overall indoor unit 200 needs to perform the reheat and dehumidification functions, some indoor heat exchangers are required to heat and some indoor heat exchangers are required to cool. The first indoor heat exchanger 210 cools and the second indoor heat exchanger heats, for example. In the first indoor heat exchanger, the refrigerant at this time passes through the outdoor heat exchanger 141 by the first pipe 140, is sent to the second indoor heat exchanger 220 by the first pipe 140 to be cooled, passes through the first communication pipe 214, the first connection pipe 215, and the third communication pipe 219, and is sent back to the suction pipe by the second pipe 150. During this process, the first control valve 217 is opened and the second control valve 218 is closed. Therefore, the first indoor heat exchanger 210 can realize a working state different from that of other heat exchangers, which is beneficial to improving the use occasion of the first indoor heat exchanger 210.

When the first indoor heat exchanger 210 heats, the refrigerant flows from the discharge pipe 111, through the third pipe 160, the fourth communication pipe 229, the second connection pipe 216, and the first communication pipe 214, into the second port 212, flows out of the first port 211, enters the first pipe 140, and flows into the suction pipe through the first pipe 140. During this process, the second control valve 218 is opened and the first control valve 217 is closed.

In the same way, the switching device comprises:

a third connection pipe 225, the third connection pipe 225 connecting the second connection pipe 224 and the third connection pipe 219, the third connection pipe 225 being provided with a third control valve 227; and a fourth connection pipe 226, the fourth connection pipe 226 connecting the second connection pipe 224 and the fourth connection pipe 229, and a fourth control valve 228 provided on the fourth connection pipe 226.

A third control valve 227 is arranged on the third connecting pipe 225; a fourth control valve 228 is provided on the fourth connection pipe 226. In this way, the fourth port 222 is selectively communicated with the third pipe 160 or the second pipe 150, so that the operating state of the second indoor heat exchanger 220 can be arbitrarily adjusted according to the requirement, and is not affected by the operating modes of other indoor heat exchangers. When the second indoor heat exchanger 220 cools, the third control valve 227 is opened, and the fourth control valve 228 is closed; when the second indoor heat exchanger 220 performs heating, the third control valve 227 is opened and the fourth control valve 228 is closed, or the third control valve 227 is closed and the fourth control valve 228 is opened (in the case of heating the second indoor heat exchanger 220 in the above embodiment, it is necessary that the second pipe 150 communicates with the discharge pipe 111 and the first pipe 140 communicates with the suction pipe 113).

Case one is realized by the form of a three-way valve:

the switching device includes:

a first connection pipe 215, the first connection pipe 215 connecting the first connection pipe 214 and the third connection pipe 219;

a second connection pipe 216, the second connection pipe 216 connecting the first connection pipe 214 and the fourth connection pipe 229;

a first three-way valve is disposed at a junction of the first connection pipe 215, the second connection pipe 216 and the first connection pipe 214 to control the first connection pipe 214 to communicate with the first connection pipe 215 and/or the second connection pipe 216.

Specifically, in this embodiment, one end of the first communication pipe 214 is communicated with the second port 212, and the other end is communicated with a first three-way valve, the first communication pipe 214 is respectively communicated with the first connection pipe 215 and the second connection through the first three-way valve, and the ports of the first three-way valve respectively connected with the two connection pipes can be controlled to be opened and closed. In this manner, the on/off of the first connection pipe 215 and the second connection pipe 216 can be controlled by the first three-way valve. The connection of the first connecting pipe 214, the first connecting pipe 215 and the second connecting pipe 216 is facilitated, and meanwhile the connection and disconnection of the two connecting pipes can be conveniently controlled.

In the same way, the switching device comprises:

a third connection pipe 225, the third connection pipe 225 connecting the second communication pipe 224 and the third communication pipe 219;

a fourth connection pipe 226, the fourth connection pipe 226 connecting the second connection pipe 224 and the fourth connection pipe 229;

a second three-way valve is disposed at a junction of the third connection pipe 225, the fourth connection pipe 226, and the second connection pipe 224 to control the first connection pipe 214 to be communicated with the first connection pipe 215 and/or the second connection pipe 216.

The fourth through port 222 communicates with the third pipe 160 of the air conditioner via a third connecting pipe, and the fourth through port 222 communicates with the second pipe 150 via a fourth connecting pipe 226; the third connection pipe 225 and the fourth connection pipe 226 are communicated with the fourth port 222 through the second communication pipe 224. The air conditioner further includes a second three-way valve through which the second communication pipe 224 is communicated with the third and fourth connection pipes 226, respectively.

Specifically, in this embodiment, one end of the second communication pipe 224 is communicated with the fourth through port 222, and the other end is communicated with the second three-way valve, that is, the second communication pipe is respectively communicated with the third connection pipe and the fourth connection pipe through the second three-way valve, and the ports of the second three-way valve respectively connected with the two connection pipes can be controlled to be opened and closed. In this way, the third connection pipe and the fourth connection pipe 226 can be opened and closed by the second three-way valve. The on-off control of the two connecting pipes can be conveniently realized while the convenient connection of the fourth through opening 222 and the third and fourth connecting pipes 226 is facilitated.

Case two is realized by the form of a three-way valve:

note that, regarding the connection form of the third pipe 160 and the first connection pipe 215 and the third connection pipe 225, the first connection pipe 215 and the third connection pipe 225 may be connected to the third pipe 160 independently of each other, or may be connected to the third pipe 160 after a plurality of pipes are connected. For example, the first connection pipe 215 and the third connection pipe 225 communicate with the second pipe 150 via the third communication pipe 219.

The switching device includes:

a third three-way valve is disposed at a connection of the first connection pipe 215, the third connection pipe 225, and the third connection pipe 219 to control the third connection pipe 219 to communicate with the first connection pipe 215 and/or the third connection pipe 225. The third three-way valve controls the on/off of the third communication pipe 219 and the first connection pipe 215 and the on/off of the third communication pipe 219 and the third connection pipe 225.

Similarly, as for the connection mode of the second pipe 150 and the second and fourth connection pipes 216 and 226, the second and fourth connection pipes 216 and 226 may be independently connected to the second pipe 150, or may be connected to the second pipe 150 after being connected to a plurality of pipes. For example, the second connection pipe 216 and the fourth connection pipe 226 are connected to each other, and then connected to the second pipe 150 via the fourth connection pipe 229.

The switching device includes:

a fourth three-way valve is disposed at a junction of the second connection pipe 216, the fourth connection pipe 226, and the fourth connection pipe 229 to control the fourth connection pipe 229 to be communicated with the second connection pipe 216 and/or the fourth connection pipe 226.

The fourth three-way valve is disposed at a junction of the second connection pipe 216, the fourth connection pipe 226, and the fourth connection pipe 229 to control on/off of the fourth connection pipe 229 and the second connection pipe 216 and on/off of the fourth connection pipe 229 and the fourth connection pipe 226.

The utility model discloses still provide an air conditioner, this air conditioner includes machine 200 in air condensing units 100 and the air conditioning, and the concrete structure of this machine 200 in the air conditioning refers to above-mentioned embodiment, because this air conditioner has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here. The outdoor unit 100 of the air conditioner includes a compressor 110 and an outdoor heat exchanger 141; a discharge pipe 111 connected to a discharge side of the compressor 110, a suction pipe 113 connected to a suction side of the compressor 110, and a first pipe 140 connecting the discharge pipe 111, the outdoor heat exchanger 141, and one or more indoor heat exchangers of the indoor air conditioner 200 in this order; a second pipe 150 connecting the one or more indoor heat exchangers and the suction pipe 113; and a third pipe 160, the third pipe 160 connecting one or more indoor heat exchangers and the discharge pipe 111.

In some embodiments, to improve the flexibility of the system, the air conditioner further comprises a switch capable of switching between a first switching state and a second switching state,

in the first switching state, the switching device causes the first pipe 140 to communicate with the suction pipe 113 and causes the second pipe 150 to communicate with the discharge pipe 111;

in the second switching state, the switch connects the first pipe 140 to the discharge pipe 111 and connects the second pipe 150 to the suction pipe 113.

In this manner, the first pipe 140 may convey the high-temperature and high-pressure refrigerant in the discharge pipe 111 to the outdoor heat exchanger 141 (the first pipe 140 communicates with the discharge pipe 111), or may return the low-temperature and low-pressure refrigerant flowing out of the outdoor heat exchanger 141 to the compressor 110 (the first pipe 140 communicates with the suction pipe 113).

In some embodiments, the air conditioner further includes a plurality of indoor units 200, and the heat exchanger types included in each indoor unit 200 may be different, such as an indoor unit with dehumidification and reheating functions (including both the first indoor heat exchanger 210 and the second indoor heat exchanger 220), an ordinary cooling/heating indoor unit (including only one heat exchanger and a corresponding throttling device), and an indoor unit with a switching device capable of freely switching cooling or heating states, so that the air conditioner can simultaneously perform hybrid operations of dehumidification and reheating, cooling, heating, temperature rise and dehumidification, and the like.

Specifically, the number of the air-conditioning indoor units 200 is plural, and the plural air-conditioning indoor units 200 are connected in parallel to the first pipe 140, the second pipe 150, and the third pipe 160; alternatively, a plurality of indoor heat exchangers are connected in parallel to the first pipe 140 and the second pipe 150. The first pipe 140, the second pipe 150, and the third pipe 160 continue to extend so that more indoor units 200 can be connected. Regarding the connection mode of the indoor unit 200 to the first pipe 140, the second pipe 150, and the third pipe 160, the third communication pipe 219 of the indoor unit 200 communicates with the second pipe 150, the fourth communication pipe 229 of the indoor unit 200 communicates with the third pipe 160, and the fifth communication pipe 258 (or the first refrigerant pipe 213 and the second refrigerant pipe 223) of the indoor unit 200 communicates with the first pipe 140.

The indoor heat exchanger may be connected to the refrigerant system in various manners, such as a conventional connection manner, in which two refrigerant inlets of the heat exchanger are respectively communicated with (via a switching device) the first pipe 140 and the second pipe 150, or may be connected to the first pipe 140 via one refrigerant inlet and the second pipe 150 and the third pipe 160 via the other refrigerant inlet as in the heat exchanger in the above embodiment. At this time, not only can the refrigerant interaction be realized between the same indoor unit 200, but also the refrigerant interaction can be realized between different indoor units 200, thereby greatly improving the utilization rate and flexibility of the refrigerant cycle, so that the indoor unit 200 of the air conditioner can realize more functions and meet the requirements of different people.

In some embodiments, to improve the ability of the air conditioner to heat at low temperatures, the air conditioner further comprises an economizer 143; the economizer 143 is provided in the first pipe 140 between the outdoor heat exchanger and the indoor unit, and a return pipe 146 of the economizer 143 communicates with the medium-pressure suction port of the compressor 110. The return pipe 146 may have various forms, and the return pipe 146 may include only a return pipe body, or may include the return pipe body 146 and a first conduction pipe 148, and one end of the first conduction pipe 148 is communicated with the return pipe body 146, and the other end is communicated with the medium-pressure suction port of the compressor 110.

A fifth control valve 133 is provided in the return line 146 or in a first conduction pipe 148 between the return line 146 and the medium-pressure suction port of the compressor 110. The compressor 110 in this case is a vapor injection enthalpy compressor 110, and has a low pressure suction port and an intermediate pressure suction port.

The economizer 143 has a throttling function, a first refrigerant flow path 143a and a second refrigerant flow path 143b are arranged in the economizer 143, and two ends of the first refrigerant flow path 143a are respectively communicated with the first piping 140 at two ends of the economizer 143; one end of the second refrigerant passage 143b is connected to the first pipe 140 via a liquid taking pipe 145, and the other end is connected to a medium-pressure suction port of the compressor 110 via a return pipe 146; a liquid extraction throttle 144 is provided in the liquid extraction pipe 145. One end of the first refrigerant flow path 143a communicates with a refrigerant inlet of the economizer 143, and the other end communicates with a refrigerant outlet of the economizer 143. The liquid extraction pipe 145 has one end communicating with the first pipe 140 and the other end communicating with the second refrigerant passage 143b, and the return pipe 146 has one end communicating with the medium-pressure suction port of the compressor 110 and the other end communicating with the second refrigerant passage 143 b. The liquid taking pipe 145 is used to convey the refrigerant in the first pipe 140 to the second refrigerant passage 143b of the economizer, and the return pipe 146 is used to return the refrigerant in the second refrigerant passage 143b to the medium-pressure suction port of the compressor 110.

As described above, referring to the refrigerant flow path in the heating mode, the high-temperature and high-pressure refrigerant flows out of the discharge pipe 111 of the compressor 110, passes through the third pipe 160 (via the first connection pipe) or the second pipe 150 (via the second connection pipe), enters the indoor heat exchanger to be heated, and flows through the economizer 143, the outdoor throttle device 142, the outdoor heat exchanger, and the suction pipe 113 along the first pipe 140 in sequence, and then flows back to the low-pressure suction port of the compressor 110.

The liquid refrigerant enters the economizer 143 and is divided into two parts: the first part directly enters an outdoor heat exchanger for evaporation and heat absorption after being throttled and reduced in pressure by an outdoor throttling device 142 (an electronic expansion valve), the second part enters an economizer 143 for heat absorption and evaporation after being throttled and reduced in pressure by a liquid taking throttling valve 144 (the electronic expansion valve), the evaporated medium-pressure saturated steam enters a medium-pressure air suction port of the compressor 110 through a return pipe 146, a fifth control valve 133 and a conduction pipe and is mixed with a refrigerant at a low-pressure air suction port of the compressor 110 for compression, 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 a low-temperature heating capacity and a system is improved. Through the utility model discloses a technique, when outdoor ambient temperature is low temperature, through the system design of air injection enthalpy-increasing compressor 110 and economic ware 143, increases the refrigerant air suction volume under the compressor 110 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 order to improve the liquid extraction effect, the inflow end of the liquid extraction pipe 145 is communicated with the first pipe 140 between the economizer 143 and the outdoor heat exchanger, and in other embodiments, the inflow end of the liquid extraction pipe 145 can also be communicated with the first pipe 140 between the economizer 143 and the indoor unit. That is, the refrigerant flows in from the refrigerant outflow end of the economizer 143, which is advantageous for improving the reliability of liquid extraction.

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 120 and an economizer 143, wherein the gas-liquid separator 120 is disposed on the low-pressure suction pipe 113; the economizer 143 is provided in the first pipe 140 between the outdoor heat exchanger and the first indoor throttle device, and a return pipe 146 of the economizer 143 communicates with the gas-liquid separator 120. The return pipe 146 may have various forms, and the return pipe 146 may include only the body of the return pipe 146, or may include the body of the return pipe 146 and a second conduit 147, where one end of the second conduit 147 is communicated with the return pipe body 146, and the other end is communicated with the gas-liquid separator 120.

For convenience of control, in some examples, the return pipe 146 is communicated with the gas-liquid separator 120 through the low pressure suction pipe 113, and the sixth control valve 149 is disposed on the return pipe 146 or a second communication pipe between the return pipe 146 and the low pressure suction pipe 113.

The utility model discloses an adopt the system design who takes economic ware 143 on the basis of three-pipe system dehumidification reheating scheme, take liquid choke valve 144 (electronic expansion valve) of getting in the economic ware 143 system design return circuit through the control, further reduce the refrigerant condensation temperature of outdoor heat exchanger export, 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 was full liquid, can solve the refrigerant abnormal sound that the gas-liquid double-phase attitude produced.

Referring to the refrigeration mode, after the compressor 110 exhausts air and is switched by the switch 131, the high-pressure and high-temperature gaseous refrigerant enters the outdoor heat exchanger for condensation and heat exchange, and the gas-liquid two-phase medium-temperature and high-pressure refrigerant coming out of the outdoor heat exchanger enters the economizer 143 and then is divided into two parts: the first part is throttled and depressurized by the liquid taking throttle valve 144, then enters the economizer 143 through the liquid taking pipe 145 to absorb heat and evaporate, the evaporated gaseous refrigerant enters the air suction port of the compressor 110 through the return pipe 146, the sixth control valve 149 (solenoid valve) and the conduction pipe are mixed with the gaseous refrigerant which is subjected to heat absorption and evaporation by the indoor heat exchanger, the second part is further condensed and heat exchanged from the economizer 143, 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 the first indoor throttling device and the second indoor throttling valve and then enters the first indoor heat exchanger 210 and the second indoor heat exchanger 220 to absorb heat and evaporate. The refrigerant entering the first throttling device 230 and the second throttling device 240 (electronic expansion valve) changes from a gas-liquid two-phase state to a pure liquid state, so that the problem of abnormal sound of the refrigerant generated when the gas-liquid two-phase refrigerant passes through the throttling devices is solved.

In this embodiment, through the technical scheme of the utility model, can further reduce the refrigerant condensation temperature of outdoor heat exchanger export, improve the supercooling degree, make the refrigerant be liquid from the complete condensation of gas-liquid two-phase state, liquid refrigerant gets into indoor heat exchanger endothermic evaporation after indoor electronic expansion valve (first throttling arrangement 230 and second throttling arrangement 240) throttle step-down, when the refrigerant through indoor throttling arrangement (first throttling arrangement 230 and second throttling arrangement 240) is full liquid, can solve the produced refrigerant abnormal sound problem of gas-liquid two-phase state refrigerant through throttling arrangement, improve user's satisfaction

It should be noted that in some embodiments, the return pipe 146 is connected to the intermediate-pressure suction port of the compressor 110 and the gas-liquid separator 120 through different conduits, and in this case, the fifth control valve 133 (close to the compressor 110) and the sixth control valve 149 (close to the gas-liquid separator 120) are respectively disposed on the two conduits (the first conduit 148 and the second conduit 147). The return pipe 146 in this case includes the body of the return pipe 146 and two conduits. In the heating mode, the sixth control valve 149 is closed, and the fifth control valve 133 is opened, so that the refrigerant flows into the compressor 110, thereby improving the heating capacity; and in the cooling mode or the constant-temperature dehumidification mode, the fifth control valve is closed, and the sixth control valve is opened to eliminate abnormal sound. Of course, in some embodiments, the sixth control valve 149 may be closed and the fifth control valve 133 may be opened as required by particular operating conditions. The arrangement is such that the air conditioner can adjust the fifth control valve 133 and the sixth control valve according to specific conditions, thereby improving the heating capacity of the air conditioner in the heating mode and reducing noise in the cooling and constant temperature dehumidification modes.

Regarding the specific connection between the compressor 110 and the economizer 143, the compressor 110 is an enhanced vapor injection compressor 110, and the compressor 110 has a conventional high pressure discharge port P, a low pressure suction port S, and a medium pressure suction port M (i.e., a vapor injection port) through which medium pressure refrigerant vapor enters the compressor 110 to increase the effective flow rate of the refrigerant.

The port a of the economizer 143 is connected with one end of the outdoor heat exchanger, the port b of the economizer 143 is connected with the indoor unit, the port c of the economizer 143 is connected with the liquid taking pipe 145, the port d of the economizer 143 is connected with the return pipe 146, the liquid taking throttle valve 144 is connected in series with the liquid taking pipe 145, the fifth control valve is connected in series with the first conduction pipe, the sixth control valve is connected in series with the sixth conduction pipe, one end of the first conduction pipe is connected with the medium-pressure suction port M of the compressor 110, and the second conduction pipe is connected with the inlet end of the gas-liquid separator 120.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. An indoor unit of an air conditioner, comprising:

2. An indoor unit of an air conditioner according to claim 1, wherein the switching means comprises:

3. An indoor unit of an air conditioner according to claim 1, wherein the switching means comprises:

4. An indoor unit of an air conditioner according to claim 1, wherein the switching means comprises:

5. An indoor unit of an air conditioner according to claim 1, wherein the switching means comprises:

6. An indoor unit of an air conditioner according to claim 1, wherein the switching means comprises:

7. An indoor unit of an air conditioner according to claim 1, wherein the switching means comprises:

8. The indoor unit of claim 1, wherein the first outlet is connected to a first pipe of the air conditioner via a first refrigerant pipe, and the first refrigerant pipe is provided with a first indoor throttling device;

9. The indoor unit of claim 8, wherein the first refrigerant pipe and the second refrigerant pipe are connected to the first pipe by a fifth connection pipe.

10. An air conditioner, comprising:

the indoor unit of an air conditioner according to any one of claims 1 to 9;

and a third pipe connecting the one or more indoor heat exchangers and the discharge pipe.

11. The air conditioner as claimed in claim 10, further comprising a first switch switchable between a first switch first switching state and a first switch second switching state;

12. The air conditioner according to claim 10, wherein the number of the air conditioning indoor units is plural, and the plural air conditioning indoor units are connected in parallel to a first pipe, a second pipe, and a third pipe;

or a plurality of indoor units are connected in parallel to the first pipe and the second pipe.

13. The air conditioner as claimed in claim 10, wherein the outdoor unit further comprises an economizer; the economizer is arranged on a first pipe between the outdoor heat exchanger and the indoor unit of the air conditioner, and a return pipe of the economizer is communicated with a medium-pressure suction inlet of the compressor.

14. The air conditioner as claimed in claim 13, wherein a first refrigerant flow path and a second refrigerant flow path are provided in the economizer, and both ends of the first refrigerant flow path are respectively communicated with first pipes at both ends of the economizer; one end of the second refrigerant flow path is communicated with the first pipe through a liquid taking pipe, and the other end of the second refrigerant flow path is communicated with a medium-pressure suction inlet of the compressor through a return pipe; and a liquid taking throttle valve is arranged on the liquid taking pipe.

15. The air conditioner according to claim 14, wherein the inflow end of the liquid take-out pipe communicates with a first pipe between the economizer and the outdoor side heat exchanger, or,

16. The air conditioner as claimed in claim 13, wherein the return pipe includes a return pipe body, a first introduction pipe and a second introduction pipe;