CN111780227B

CN111780227B - Indoor unit of air conditioner, air conditioner and assembling method

Info

Publication number: CN111780227B
Application number: CN202010619299.4A
Authority: CN
Inventors: 刘庆赟; 郝本华; 樊明敬; 徐中华; 张千; 蔡婷婷; 罗欢; 杨硕; 于文灿
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2022-04-19
Anticipated expiration: 2040-07-01
Also published as: CN111780227A

Abstract

The application relates to the technical field of air conditioners, and discloses an indoor unit of an air conditioner, which comprises: the first switch comprises a first interface, a second interface, a third interface and a fourth interface, wherein the second interface is selectively communicated with the first interface or the third interface, the first interface is communicated with a first refrigerant inlet and outlet of the indoor unit, the second interface is used for being communicated with one end of the first on-line pipe, and the third interface is used for being communicated with a vacuumizing device to vacuumize the first on-line pipe. Fill in to the indoor set through first switch or other devices and annotate the refrigerant, fill the indoor set and annotate the refrigerant and accomplish the back, intercommunication second interface and third interface, carry out the evacuation through evacuating device to first online pipe, can carry out the evacuation to first online pipe in the indoor side on the one hand, improve the security of evacuation operation, on the other hand, need not be to the indoor set evacuation, and the time to first online pipe evacuation is about 1min to shorten the time of air conditioner evacuation greatly. The application also discloses an air conditioner and an assembling method.

Description

Indoor unit of air conditioner, air conditioner and assembling method

Technical Field

The present disclosure relates to the field of air conditioning technologies, and in particular, to an indoor unit of an air conditioner, and an assembling method.

Background

Currently, air conditioners on the market, such as inverter air conditioners, must be evacuated before installation. The vacuum pumping is performed outside the room for 15 minutes or more, so that the air conditioner has low installation efficiency, high installation risk factor and high installation cost, and brings inconvenience to companies and users.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides an indoor unit of an air conditioner, the air conditioner and an assembling method, which aim to solve the problems that the conventional air conditioner is vacuumized on the outdoor side and the vacuuming time is long.

According to a first aspect of an embodiment of the present invention, there is provided an indoor unit of an air conditioner, the air conditioner including an outdoor unit, a first coupling pipe, and a refrigerant flow path formed by communicating the indoor unit and a second coupling pipe, the indoor unit including: the first switch comprises first to third interfaces, the second interface is selectively communicated with the first interface or the third interface, the first interface is communicated with a first refrigerant inlet and outlet of the indoor unit, the second interface is used for being communicated with one end of the first on-line pipe, and the third interface is used for being communicated with a vacuumizing device to vacuumize the first on-line pipe.

According to a second aspect of the embodiments of the present invention, there is provided an air conditioner including an outdoor unit; a first on-line pipe; a second coupler tube; an indoor unit of an air conditioner according to any one of the embodiments of the first aspect; the outdoor unit, the first coupling pipe, the indoor unit and the second coupling pipe are communicated to form a refrigerant flow path.

According to a third aspect of an embodiment of the present invention, there is provided an assembling method of an air conditioner, applied to the air conditioner as set forth in any one of the above embodiments, the assembling method including: filling a refrigerant into the indoor unit, and closing the first switch; communicating the first online pipe between the third refrigerant inlet and the first refrigerant outlet; and closing the third switch, and communicating the second interface and the third interface so as to vacuumize the first on-line pipe through a vacuumizing device.

The indoor unit of the air conditioner, the air conditioner and the assembling method provided by the embodiment of the disclosure can realize the following technical effects: fill the notes refrigerant in to the indoor set through first switch (this moment first interface is linked together with the second interface) or other devices, fill the indoor set and fill the refrigerant and accomplish the back, intercommunication second interface and third interface, carry out the evacuation through evacuating device to first online pipe, can carry out the evacuation to first online pipe at the indoor side on the one hand, avoid in the outdoor side evacuation, improve the security of evacuation operation, on the other hand, need not be to the indoor set evacuation, and the time to first online pipe evacuation is about 1min or so, thereby shorten the time of air conditioner evacuation greatly, improve the packaging efficiency of air conditioner, reduce assembly cost.

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

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a schematic structural diagram of an air conditioner provided in an embodiment of the present disclosure;

FIG. 2 is an enlarged schematic view of a portion of the air conditioner shown in FIG. 1;

FIG. 3 is an enlarged schematic view of another portion of the air conditioner shown in FIG. 1;

fig. 4 is a schematic structural diagram of a wrench-type control valve provided in the embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of an indoor unit provided in the embodiment of the present disclosure;

FIG. 6 is a schematic flow chart diagram of an assembly method provided by embodiments of the present disclosure;

fig. 7 is a schematic flow chart of another assembly method provided by the embodiments of the present disclosure.

Reference numerals:

10 indoor units, 101 a first refrigerant inlet and outlet, 102 a second refrigerant inlet and outlet, 103 indoor heat exchangers, 104 a first pipeline, 105 a second pipeline, 20 outdoor units, 201 a third refrigerant inlet and outlet, 202 a fourth refrigerant inlet and outlet, 30 a first linkage pipe, 40 a second linkage pipe, 50 wrench type control valves, 501 guillotines, 502 valve bodies, 70 a first switch, 701 a first interface, 702 a second interface, 703 a third interface, 80 a second switch, 801 a first joint, 802 a second joint, 803 a third joint, 90 a third switch, 100 a fourth switch and 200 vacuumizing devices.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Referring to fig. 1, an indoor unit of an air conditioner according to an embodiment of the present disclosure includes an outdoor unit 20, a first coupling pipe 30, and a refrigerant flow path formed by communicating an indoor unit 10 and a second coupling pipe 40. The indoor unit 10 includes an indoor heat exchanger 103, and as shown in fig. 5, the indoor heat exchanger is provided with a first inlet and a second inlet, the first inlet and the second inlet are connected to one end of a first pipeline 104, the second inlet and the second outlet are connected to one end of a second pipeline 105, the other end of the first pipeline forms a first refrigerant inlet 101, the other end of the second pipeline forms a second refrigerant inlet 102, the first refrigerant inlet 101 and the second refrigerant inlet 102 are provided in the indoor unit 10 and are both communicated with the indoor heat exchanger 103, refrigerant flows into the indoor heat exchanger 103 from the first refrigerant inlet 101 and flows out of the indoor heat exchanger 103 from the second refrigerant inlet 102, or refrigerant flows into the indoor heat exchanger 103 from the second refrigerant inlet 102 and flows out of the indoor heat exchanger 103 from the first refrigerant inlet 101. The outdoor unit 20 includes an outdoor heat exchanger, and a third refrigerant inlet/outlet 201 and a fourth refrigerant inlet/outlet 202 are provided in the outdoor unit 20 and are both communicated with the outdoor heat exchanger, and the refrigerant flows into the outdoor heat exchanger through the third refrigerant inlet/outlet 201 and flows out of the outdoor heat exchanger through the fourth refrigerant inlet/outlet 202, or the refrigerant flows into the outdoor heat exchanger through the fourth refrigerant inlet/outlet 202 and flows out of the outdoor heat exchanger through the third refrigerant inlet/outlet 201. As shown in fig. 1, when the air conditioner is operated, a refrigerant flows along a refrigerant flow path and sequentially flows through the outdoor unit 20, the first joint pipe 30, the indoor unit 10, and the second joint pipe 40, or sequentially flows through the outdoor unit 20, the second joint pipe 40, the indoor unit 10, and the first joint pipe 30.

As shown in fig. 3 and 5, the indoor unit 10 includes a first switch 70, the first switch 70 includes first to third ports 703, and the second port 702 is selectively communicated with the first port 702 or the third port 703, wherein the first port 702 is communicated with the first refrigerant inlet/outlet 101 of the indoor unit 10, the second port 702 is used for being communicated with the first on-line pipe 30, and the third port 703 is used for being communicated with the vacuum pumping device 200 to vacuum the first on-line pipe 30.

The second interface 702 can communicate with the first interface 702, or the second interface 702 can communicate with the third interface 703. When the second port 702 is communicated with the first port 702, the first connecting pipe 30 is communicated with the first refrigerant inlet and outlet 101, so that the normal operation of the air conditioner is realized. When the second interface 702 is communicated with the third interface 703, the ejector pin device is fixed at the third interface 703, and then the vacuum-pumping device 200 is connected, so that the first online pipe 30 can be vacuumized, and the air in the first online pipe 30 can be completely pumped in about 1min, thereby greatly shortening the time for vacuumizing. The evacuation device 200 may be a vacuum pump or other device capable of evacuating.

Optionally, the first switch 70 includes a first three-way valve, and the first to third ports 703 are three ports of the first three-way valve, respectively.

It is understood that the first switch 70 may also be a four-way valve. The first switch 70 may be a manual switch or an electromagnetic switch.

Optionally, as shown in fig. 3 and 5, the indoor unit 10 further includes a second switch 80, the second switch 80 includes first to third joints 803, and the second joint 802 is selectively communicated with the first joint 801 or the third joint 803, wherein the first joint 801 is communicated with the second refrigerant inlet/outlet 102 of the indoor unit 10, the second joint 802 is used for being communicated with the second coupling pipe 40, and the third joint 803 is used for being communicated with the vacuum extractor 200 to extract vacuum from the second coupling pipe 40.

The second joint 802 can be in communication with the first joint 801, or the second joint 802 can be in communication with the third joint 803. When the second joint 802 is communicated with the first joint 801, the second coupling pipe 40 is communicated with the second refrigerant inlet and outlet 102, so that the normal operation of the air conditioner is realized. When the second connector 802 is communicated with the third connector 803, the ejector pin device is fixed at the third connector 803, and then the vacuum-pumping device 200 is connected, so that the second coupling pipe 40 can be vacuumized, and the air in the second coupling pipe 40 can be completely pumped out in about 1min, thereby greatly shortening the time for vacuumizing.

The vacuum apparatus 200 connected to the second connector 802 may be the same vacuum apparatus 200 as the vacuum apparatus 200 connected to the second interface, or may be a different vacuum apparatus 200. When the first and

second connector pipes

30 and 40 are evacuated, the first and

second connector pipes

30 and 40 may be evacuated at the same time, or the evacuation of the first connector pipe 30 and the evacuation of the second connector pipe 40 may not be performed at the same time, and the first connector pipe 30 may be evacuated first or the second connector pipe 40 may be evacuated first. When the first and

second connector pipes

30 and 40 are simultaneously evacuated, the number of the vacuum evacuation devices 200 may be plural, and the first and

second connector pipes

30 and 40 are respectively evacuated, or the number of the vacuum evacuation devices 200 may be one, and the first and

second connector pipes

30 and 40 are simultaneously evacuated by one vacuum evacuation device 200, for example, the vacuum evacuation device 200 is a double-head vacuum evacuation device 200, and two heads of the double-head vacuum evacuation device 200 are respectively connected to the first and

second connector pipes

30 and 40.

Optionally, the second switch 80 comprises a second three-way valve.

It is understood that the second switch 80 may also be a four-way valve. The second switch 80 may be a manual switch or an electromagnetic switch.

An embodiment of the present disclosure provides an air conditioner, as shown in fig. 1, including an outdoor unit 20, a first coupling pipe 30, a second coupling pipe 40, and an indoor unit 10 of the air conditioner as in any one of the above embodiments.

The outdoor unit 20, the first coupling pipe 30, the indoor unit 10, and the second coupling pipe 40 are connected to form a refrigerant passage.

The air conditioner provided in the embodiment of the present disclosure includes the indoor unit 10 described in any one of the above embodiments, and thus includes all the beneficial effects of the indoor unit 10 described in any one of the above embodiments, which are not described herein again.

Optionally, the air conditioner further includes a third switch 90 and a fourth switch 100, the third switch 90 is disposed between a third refrigerant inlet/outlet 201 of the outdoor unit 20 and the first on-line pipe 30; the fourth switch 100 is disposed between the fourth refrigerant inlet/outlet 202 of the outdoor unit 20 and the second joint pipe 40; one of the third switch 90 and the fourth switch 100 is configured to control on/off of a refrigerant flow path in the outdoor unit 20, and to fill the refrigerant into the outdoor unit 20 or to extract the refrigerant from the outdoor unit 20, and the other of the third switch 90 and the fourth switch 100 is configured to control on/off of the refrigerant flow path in the outdoor unit 20.

Optionally, as shown in fig. 2, the air conditioner further includes a third switch 90 and a fourth switch 100.

The third switch 90 is disposed between the third refrigerant inlet/outlet 201 of the outdoor unit 20 and the first on-line pipe 30, and the third switch 90 is disposed at the third refrigerant inlet/outlet 201 of the outdoor unit 20 and connected to the other end of the first on-line pipe 30; the fourth switch 100 is disposed between the fourth refrigerant inlet/outlet 202 of the outdoor unit 20 and the second joint pipe 40, and the fourth switch 100 is disposed at the fourth refrigerant inlet/outlet 202 of the outdoor unit 20 and connected to the other end of the second joint pipe 40.

One of the third switch 90 and the fourth switch 100 is configured to control on/off of a refrigerant in the outdoor unit 20, and to charge the refrigerant into the outdoor unit 20 or to extract the refrigerant from the outdoor unit 20; the other of the third switch 90 and the fourth switch 100 is configured to control on/off of the refrigerant in the outdoor unit 20, and it is understood that the other of the third switch 90 and the fourth switch 100 may also be configured to charge the refrigerant into the outdoor unit 20 or to draw the refrigerant from the outdoor unit 20.

The outdoor unit 20 may be charged with the refrigerant through one of the third switch 90 and the fourth switch 100, and at this time, the other of the third switch 90 and the fourth switch 100 is turned off, so that the outdoor unit 20 does not need to be vacuumized when the air conditioner is installed, and the installation efficiency of the air conditioner is further improved.

Optionally, the other of the third and

fourth switches

90, 100 comprises a second quick coupling, a two-way valve, a fourth three-way valve, or a toggle control valve 50.

When the other of the third switch 90 and the fourth switch 100 is the second quick connector, taking the third switch 90 as the second quick connector as an example, one of the male connector and the female connector of the second quick connector is disposed at the other end of the first on-line pipe 30, and the other of the male connector and the female connector of the second quick connector is disposed at the third refrigerant inlet/outlet 201, and the first on-line pipe 30 may also be charged with the refrigerant through the second quick connector. Taking the fourth switch 100 as the second quick connector as an example, one of the male connector and the female connector of the second quick connector is disposed at the other end of the second connector pipe 40 and connected to the fifth switch at the other end of the second connector pipe 40, and the other of the male connector and the female connector of the second quick connector is disposed at the fourth refrigerant inlet/outlet 202, and the second quick connector may be used to charge the second connector pipe 40 with the refrigerant. The second quick coupling adopts a quick coupling with two closed ends. The quick joint with two closed ends means that the second quick joint is disconnected when the male head and the female head of the second quick joint are not connected together; when the male head and the female head of the second quick connector are connected together, the second quick connector is conducted. The second quick-operation joint of second quick-operation joint disconnection when public head and female head butt joint as long as satisfy second quick-operation joint can realize that second quick-operation joint switches on, public head and female head do not dock is all in the protection scope of this application.

When the other of the third switch 90 and the fourth switch 100 is a two-way valve, the opening and closing of the refrigerant passage located in the outdoor unit 20 may be controlled by the two-way valve. Taking the third switch 90 as a two-way valve as an example, two ports of the two-way valve are respectively communicated with the other end of the first connecting pipe 30 and the third refrigerant inlet/outlet 201. Taking the fourth switch 100 as a two-way valve as an example, two ports of the two-way valve are respectively connected to the other end of the second coupler pipe 40 and the fourth refrigerant inlet/outlet 202.

When the other of the third switch 90 and the fourth switch 100 is the fourth three-way valve, the second coupler pipe 40 or the outdoor unit 20 may be charged with the refrigerant by the fourth three-way valve. Taking the third switch 90 as the fourth three-way valve as an example, the fourth three-way valve includes a port, two ports and three ports, the port is connected to the other end of the first coupling pipe 30, the port is connected to the third refrigerant inlet/outlet 201, and the three ports are used as maintenance ports, when maintenance is needed, refrigerant in the outdoor unit 20 is extracted through the three ports, wherein the port is selectively communicated with one of the port and the port, or the port is selectively communicated with one of the port and the port, and refrigerant can be filled into the second refrigerant inlet/outlet 102 or the second coupling pipe 40 through the three ports. Taking the fourth switch 100 as the fourth three-way valve as an example, the fourth three-way valve includes a port, two ports and three ports, the port is connected to the other end of the second coupling pipe 40, the port is connected to the fourth refrigerant inlet/outlet 202, and the three ports are used as maintenance ports, when maintenance is needed, refrigerant in the outdoor unit 20 is extracted through the three ports, wherein the port is selectively communicated with one of the port and the port, or the port is selectively communicated with one of the port and the port, and refrigerant can be filled into the fourth refrigerant inlet/outlet 202 or the second coupling pipe 40 through the three ports.

When the other of the third switch 90 and the fourth switch 100 is the wrench-type control valve 50, as shown in fig. 4, the wrench-type control valve 50 includes a valve main body 502 and a knife blade 501 connected to the valve main body 502, the knife blade 501 is movably connected to the valve main body 502, and the on/off of the wrench-type control valve 50 can be controlled by adjusting the position of the knife blade 501 relative to the valve main body 502, for example, the knife blade 501 is rotatably connected to the valve main body 502, and the knife blade 501 rotates relative to the valve main body 502 between a first position and a second position, the knife blade 501 is at the first position, in which the ball valve hole of the valve main body 502 is perpendicular to the refrigerant flow path, the wrench-type control valve 50 is disconnected, and the refrigerant flow path is disconnected; the knife blade 501 rotates, and when the knife blade rotates to the second position, the ball valve hole is parallel to the refrigerant flow path, and the wrench-type control valve 50 is turned on. Taking the third switch 90 as the wrench-type control valve 50 as an example, both ends of the wrench-type control valve 50 are respectively connected to the other end of the first coupling pipe 30 and the third refrigerant inlet/outlet 201, and taking the fifth switch as the wrench-type control valve 50 as an example, both ends of the wrench-type control valve 50 are respectively connected to the other end of the second coupling pipe 40 and the fourth refrigerant inlet/outlet 202.

Optionally, one of the third switch 90 and the fourth switch 100 comprises a first quick coupling or a third three-way valve.

When one of the third switch 90 and the fourth switch 100 includes the first quick coupling, taking the third switch 90 as the first quick coupling as an example, one of the male coupling and the female coupling of the first quick coupling is disposed at the other end of the first on-line pipe 30, and the other of the male coupling and the female coupling of the first quick coupling is disposed at the third refrigerant inlet/outlet 201, and the first quick coupling is a quick coupling with two closed ends, and the first on-line pipe 30 or the outdoor unit 20 may be charged with the refrigerant through the first quick coupling. Taking the fourth switch 100 as the first quick coupling as an example, one of the male connector and the female connector of the first quick coupling is disposed at the other end of the second coupling pipe 40, the other of the male connector and the female connector of the first quick coupling is disposed at the fourth refrigerant inlet/outlet 202, the first quick coupling is a quick coupling with two closed ends, and the second coupling pipe 40 or the outdoor unit 20 can be charged with refrigerant through the first quick coupling.

When one of the third and

fourth switches

90 and 100 is a third three-way valve, the second manifold pipe 40 may be filled with refrigerant through the third three-way valve. Taking the third switch 90 as a third three-way valve as an example, the third three-way valve includes a port, two ports and three ports, the port is connected to the other end of the first coupling pipe 30, the port is connected to the first refrigerant inlet/outlet 101, and the three ports are used as maintenance ports, when maintenance is needed, refrigerant in the outdoor unit 20 is extracted through the three ports, wherein the port is selectively communicated with one of the port and the port, or the port is selectively communicated with one of the port and the port, and refrigerant can be filled into the second refrigerant inlet/outlet 102 or the second coupling pipe 40 through the three ports. Taking the fourth switch 100 as a third three-way valve as an example, the third three-way valve includes a port, two ports and three ports, the port is connected to the other end of the second coupling pipe 40, the port is connected to the fourth refrigerant inlet/outlet 202, and the three ports are used as maintenance ports, when maintenance is needed, refrigerant in the outdoor unit 20 is extracted through the three ports, wherein the port is selectively communicated with one of the port and the port, or the port is selectively communicated with one of the port and the port, and refrigerant can be filled into the fourth refrigerant inlet/outlet 202 or the second coupling pipe 40 through the three ports.

In one specific embodiment, as shown in fig. 2, the third switch 90 and the fourth switch 100 are a two-way valve and a three-way valve, respectively.

The embodiment of the present disclosure provides an assembling method of an air conditioner, which is applied to the air conditioner in any one of the above embodiments, and as shown in fig. 6, the assembling method includes:

in step S602, refrigerant is filled into the indoor unit 10, and the first switch 70 is closed.

Fill in to filling refrigerant in indoor set 10, the refrigerant is as a part of air conditioner operation, indoor set 10 can need not the evacuation like this, only need to manage 30 and the second union of 30 evacuation to the first union of pipe, compare in managing 30 and the second union of pipe 40 evacuation to the first union of pipe, it is long consuming time to manage 10 evacuation to the indoor set, consequently, fill in earlier in this application and fill in indoor set 10 the refrigerant can be through the air in the indoor set 10 of refrigerant discharge, do not need the evacuation in making indoor set 10, and it is short consuming time to manage 30 and the second union of pipe 40 evacuation to the first union of pipe, only need about 1min, thereby can shorten the consuming time of evacuation greatly, improve the installation effectiveness. The refrigerant can be filled into the indoor unit 10 through the first switch 70, specifically, the first interface 702 and the second interface are communicated, or the refrigerant can be filled into the indoor unit 10 through other devices except the first switch 70.

The first switch 70 is turned off to prevent the refrigerant in the indoor unit 10 from flowing to the first connecting pipe 30 through the first switch 70.

Step S604, the first connecting pipe 30 is communicated between the third refrigerant inlet/outlet 201 and the second port 702, so that the first connecting pipe 30 is connected to the first switch 70, and the first connecting pipe 30 is conveniently vacuumized by the first switch 70.

In step S606, the third switch 90 is turned off, and the second port 702 and the third port 703 are communicated, so as to evacuate the first online pipe 30 through the vacuum pumping device 200.

The outdoor unit 20 is pre-charged with the refrigerant, and the third switch 90 is closed to prevent the refrigerant in the outdoor unit 20 from flowing into the first integrated pipe 30. The second port 702 and the third port 703 are communicated, the ejector pin device is fixed at the third port 703, and the first pipe connector 30 is evacuated by the evacuation device 200.

In one embodiment, as shown in fig. 7, the assembly method includes:

in step S702, refrigerant is filled into the indoor unit 10, and the first switch 70 is closed.

Fill in to filling refrigerant in indoor set 10, indoor set 10 can need not the evacuation like this, only need to first allied oneself with quick-witted pipe 30 and the evacuation of second allied oneself with quick-witted pipe 40, compare in the evacuation of first allied oneself with quick-witted pipe 30 and second allied oneself with quick-witted pipe 40, it is long consuming time to the evacuation of indoor set 10, therefore, fill in the application earlier to filling refrigerant can be through the air in the refrigerant discharge indoor set 10 in the indoor set 10, need not the evacuation in making indoor set 10, and it is short consuming time to first allied oneself with quick-witted pipe 30 and the evacuation of second allied oneself with quick-witted pipe 40, only need about 1min, thereby can shorten the consuming time of evacuation greatly, and improve the installation effectiveness. The refrigerant can be filled into the indoor unit 10 through the first switch 70, specifically, the first interface 702 and the second interface 702 are communicated, or the refrigerant can be filled into the indoor unit 10 through other devices except the first switch 70.

Step S704, the first connecting pipe 30 is communicated between the third refrigerant inlet/outlet 201 and the second port 702, so that the first connecting pipe 30 is connected to the first switch 70, and the first connecting pipe 30 is conveniently vacuumized by the first switch 70.

In step S706, the third switch 90 is turned off, and the second port 702 and the third port 703 are communicated, so as to evacuate the first online pipe 30 through the vacuum pumping device 200.

In step S708, the second switch 80 is closed, and the second joint pipe 40 is connected between the fourth refrigerant inlet/outlet 202 and the second port 702.

The second switch 80 is turned off to prevent the refrigerant in the indoor unit 10 from flowing to the second joint pipe 40 through the second switch 80.

The second coupling pipe 40 is communicated between the fourth refrigerant inlet and outlet 202 and the second connector 702, so that the second coupling pipe 40 is connected with the second switch 80, and the second coupling pipe 40 is conveniently vacuumized through the second switch 80.

Step S710, the fourth switch 100 is closed, and the second connector 802 and the third connector 803 are communicated, so as to evacuate the second coupling pipe 40 through the vacuum pumping device 200.

The outdoor unit 20 is pre-charged with the refrigerant, and the fourth switch 100 is closed to prevent the refrigerant in the outdoor unit 20 from flowing into the second coupling pipe 40. The second connector 802 and the third connector 803 are connected, the ejector pin device is fixed to the third connector 803, and the second coupling pipe 40 is evacuated by the vacuum evacuation device 200.

Steps S702-S706 implement evacuation of the first coupling tube 30 and steps S708-S710 implement evacuation of the second coupling tube 40. Since the evacuation operations of the first and

second coupler tubes

30 and 40 are not sequential, steps S702-S706 and steps S708-S710 may be performed simultaneously, sequentially, or alternately, for example, step S702 and step S708 may be performed simultaneously. For example, the first in-line pipe 30 is evacuated, steps S702 to S706 are performed first, and then steps S708 to S710 are performed, and for example, the evacuation of the first in-line pipe 30 and the evacuation of the second in-line pipe 40 are performed simultaneously, and steps S702 to S706 and S708 to S710 may be performed simultaneously.

In one specific embodiment, third switch 90 and fourth switch 100 are a two-way valve and a three-way valve, respectively, and first coupling line 30 and second coupling line 40 are conventional coupling lines. The first switch 70 is a three-way valve device for filling the indoor unit 10 with refrigerant, and the second switch 80 is a three-way valve device for filling the indoor unit 10 with refrigerant.

The amount of refrigerant (refrigerant) filled into the outdoor unit 20 is a, and the amount of refrigerant filled into the evaporator (indoor heat exchanger 103) and other pipelines of the indoor unit 10 is b. The total refrigerant charge is a + b.

The outdoor unit 20 and the indoor unit 10 may be respectively filled with the refrigerant amounts a and b before the air conditioner is shipped.

When the air conditioner is installed, firstly, tools such as a wrench and the like are adopted to connect the first refrigerant inlet and outlet 101, the first linkage pipe 30, the second refrigerant inlet and outlet 102 and the second linkage pipe 40 of the indoor unit 10, at this time, the refrigerant is filled in the evaporator, and the first switch 70 and the second switch 80 are in a closed state; the first and

second coupling pipes

30 and 40 are connected to the two-way valve (the third switch 90) and the three-way valve (the fourth switch 100) of the outdoor unit 20, respectively, and fixed using a tool such as a wrench. Then, the thimble devices are fixed on the first switch 70 and the second switch 80 on the indoor unit 10 side by using a double-head evacuating device (double-head evacuating device 200), the first connecting pipe 30 and the second connecting pipe 40 are evacuated at the same time, the air in the first connecting pipe 30 and the second connecting pipe 40 can be evacuated in about 1 minute, then the double-head evacuating device is closed to open the two-way valve and the three-way valve of the outdoor unit 20, and the communication of the indoor unit 10, the first connecting pipe 30, the outdoor unit 20 and the second connecting pipe 40 is completed.

In conclusion, the special structure is adopted in the application, the purpose that only the first linkage pipe 30 and the second linkage pipe 40 need to be vacuumized is achieved through the pre-filled refrigerant in the evaporator of the indoor unit 10, the vacuumizing time is greatly shortened, the installation efficiency is improved, meanwhile, the vacuumizing operation is moved to the indoor side, the safety coefficient of installation personnel is greatly improved, and huge economic benefits are brought to a company.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The utility model provides an indoor set of air conditioner, the air conditioner includes off-premises station, first union coupling pipe, indoor set and the refrigerant flow path that second union coupling pipe intercommunication formed, its characterized in that, indoor set includes:

the first switch comprises first to third interfaces, the second interface is selectively communicated with the first interface or the third interface, the first interface is communicated with a first refrigerant inlet and outlet of the indoor unit, the second interface is used for being communicated with one end of the first on-line pipe, and the third interface is used for being communicated with a vacuumizing device so as to vacuumize the first on-line pipe;

the second switch comprises first to third joints, the second joint is selectively communicated with the first joint or the third joint, the first joint is communicated with a second refrigerant inlet and outlet of the indoor unit, the second joint is used for being communicated with one end of the second joint pipe, and the third joint is used for being communicated with a vacuumizing device so as to vacuumize the second joint pipe;

the third switch is arranged between a third refrigerant inlet and a third refrigerant outlet of the outdoor unit and the other end of the first on-line pipe;

the fourth switch is arranged between a fourth refrigerant inlet and outlet of the outdoor unit and the other end of the second joint pipe; one of the third switch and the fourth switch is configured to control on/off of a refrigerant in the outdoor unit, and to charge the refrigerant into the outdoor unit or to extract the refrigerant from the outdoor unit, and the other of the third switch and the fourth switch is configured to control on/off of the refrigerant in the outdoor unit;

the assembling method of the air conditioner comprises the following steps:

filling a refrigerant into the indoor unit, and closing the first switch;

a first online pipe is communicated between a third refrigerant inlet and a third refrigerant outlet of the outdoor unit and a second interface;

a refrigerant is pre-filled in the outdoor unit, the third switch is closed, and the second interface and the third interface are communicated, so that the first on-line pipe is vacuumized through the vacuumizing device;

closing the second switch and communicating a second joint pipe between a fourth refrigerant inlet and a fourth refrigerant outlet of the outdoor unit and the second interface;

and closing the fourth switch, and communicating the second joint with the third joint so as to vacuumize the second connector pipe through a vacuumizing device.

2. The indoor unit according to claim 1,

the first switch includes a first three-way valve.

3. The indoor unit according to claim 1,

the second switch includes a second three-way valve.

4. An air conditioner, comprising:

an outdoor unit;

a first on-line pipe;

a second coupler tube;

an indoor unit of an air conditioner according to any one of claims 1 to 3;

the outdoor unit, the first coupling pipe, the indoor unit and the second coupling pipe are communicated to form a refrigerant flow path.

5. The air conditioner according to claim 4,

the one of the third switch and the fourth switch includes a third three-way valve or a first quick coupling.

6. The air conditioner according to claim 4,

the other of the third switch and the fourth switch comprises a second quick connector, a two-way valve, a wrench-style control valve, or a fourth three-way valve.