CN220728352U - Air conditioner indoor unit and multi-split air conditioning system - Google Patents

Abstract

The application relates to an air conditioner and many online air conditioning system, the air conditioner includes evaporimeter, supercooling spare, first throttling element, first refrigerant pipe and second refrigerant pipe, the evaporimeter includes first mouthful and second mouth, the first end of first refrigerant pipe is used for being connected with first stop valve, the second end of first refrigerant pipe with first mouthful intercommunication, the first end of second refrigerant pipe is used for being connected with the second stop valve, the second end of second refrigerant pipe first throttling element and the second mouth communicates in proper order. According to the air conditioner indoor unit, when the air conditioner indoor unit is refrigerating, the liquid refrigerant is further cooled in the supercooling piece before entering the first throttling piece, the supercooling degree of the liquid refrigerant before throttling is improved, the liquid refrigerant is prevented from being in a gas-liquid two-phase flow state, the effect of noise improvement is achieved, the air conditioner indoor unit is simple in structure and suitable for the air conditioner indoor unit of the multi-split air conditioning system, and the supercooling degree of each air conditioner indoor unit can be guaranteed.

Description

Air conditioner indoor unit and multi-split air conditioning system

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioner indoor unit and a multi-split air conditioning system.

Background

The multi-split air conditioner system has the advantages that the connecting pipe is longer, the drop is too large, the flowing resistance is large, the refrigerant flows into the indoor unit from the outdoor unit, the supercooling degree is insufficient, when the refrigerant flows into the air conditioner indoor unit, the liquid refrigerant is in a gas-liquid two-phase flow state, and the problem of liquid flow noise can be generated before and after throttling.

In some existing multi-split air conditioner systems, the problem of liquid flow noise of an indoor unit is solved by controlling the opening degree of an expansion valve of a subcooler and the opening degree of an expansion valve of the indoor unit to establish the subcooling degree of the system and ensure the superheat degree of the indoor unit. However, aiming at the same system, the supercooling degree of each indoor unit cannot be guaranteed, the application range is narrow, and the like, and the problems of liquid flow noise caused by insufficient supercooling degree of the indoor units cannot be effectively solved.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the air conditioner indoor unit, when the air conditioner indoor unit is refrigerating, the liquid refrigerant is further cooled in the supercooling piece before entering the first throttling piece, the supercooling degree of the liquid refrigerant before throttling is improved, and the effect of noise improvement is achieved.

In a first aspect, the application provides an air conditioner indoor unit, including evaporimeter, supercooling spare, first throttling element, first refrigerant pipe and second refrigerant pipe, the evaporimeter includes first mouth and second mouth, the first end of first refrigerant pipe is used for being connected with first stop valve, the second end of first refrigerant pipe with first mouth intercommunication, the first end of second refrigerant pipe is used for being connected with the second stop valve, the second end of second refrigerant pipe first throttling element and the second mouth communicates in proper order, the supercooling spare is limited first runner and the second runner that can exchange heat each other, the both ends of first runner respectively with second refrigerant pipe with first throttling element intercommunication, first runner is used for supplying liquid refrigerant to flow, the second runner is used for supplying to absorb liquid refrigerant's thermal medium flows.

Optionally, two ends of the second flow channel are respectively communicated with the first port and the first refrigerant pipe.

Optionally, two ends of the second flow channel are respectively connected to the first refrigerant pipe in parallel, and a one-way valve or a switch valve is arranged between the second flow channel and the first refrigerant pipe.

Optionally, the parallel connection positions of the first refrigerant pipe and the second flow channel are a third port and a fourth port, the first end, the third port, the fourth port and the second end of the first refrigerant pipe are sequentially arranged along the flow sequence of the refrigerant, and the one-way valve or the switch valve is arranged between the third port and the second flow channel.

Optionally, the device further comprises a first communication pipe, one end of the first communication pipe is communicated with the second port, the other end of the first communication pipe is communicated with one end of the second flow channel, the other end of the second flow channel is communicated with the first refrigerant pipe, and a one-way valve or a switching valve is arranged between the other end of the second flow channel and the first refrigerant pipe.

Optionally, the air conditioner indoor unit further comprises a second communicating pipe, two ends of the second communicating pipe are respectively communicated with the first throttling element and one end of the second flow channel, a second throttling element is arranged on the second communicating pipe, and the other end of the second flow channel is communicated with the first refrigerant pipe.

According to the air conditioner indoor unit provided by the utility model, the supercooling piece comprises a first sub-pipeline and a second sub-pipeline, the first sub-pipeline and the second sub-pipeline extend in a spiral mode with the same rotation axis, the first sub-pipeline defines the first flow channel, and the second sub-pipeline defines the second flow channel; or (b)

The supercooling piece comprises a first sub-pipeline and a second sub-pipeline, the first sub-pipeline is sleeved outside the second sub-pipeline, one of the first sub-pipeline and the second sub-pipeline is limited with the first flow channel, and the other of the first sub-pipeline and the second sub-pipeline is limited with the second flow channel.

According to the air conditioner indoor unit provided by the utility model, the supercooling piece is sleeved with the plurality of first fins, the evaporator comprises the plurality of second fins and the heat exchange tube penetrating through the second fins, the supercooling piece is communicated with the heat exchange tube, and the first fins and the second fins are fixedly connected.

According to the air conditioner indoor unit provided by the utility model, the first refrigerant pipe is provided with the first temperature sensor, and the second refrigerant pipe is provided with the second temperature sensor.

In a second aspect, the application provides a multi-split air conditioning system, including the outer machine of air conditioner and the aforesaid air conditioner inner machine, be equipped with the compressor in the outer machine of air conditioner and with the condenser of compressor intercommunication, the condenser be used for with first stop valve intercommunication, the compressor still be used for with the second stop valve intercommunication.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

when the air conditioner indoor unit is refrigerating, the liquid refrigerant is further cooled in the supercooling piece before entering the first throttling piece, the supercooling degree of the liquid refrigerant before throttling is improved, the liquid refrigerant is prevented from being in a gas-liquid two-phase flow state, the noise improvement effect is achieved, the structure is simple, the effect is good, the air conditioner indoor unit is suitable for the air conditioner indoor unit of the multi-split air conditioner system, and the supercooling degree of each air conditioner indoor unit can be guaranteed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic view of an air conditioner indoor unit according to a first embodiment of the present utility model;

fig. 2 is a schematic view of an air conditioner indoor unit according to a second embodiment of the present utility model;

fig. 3 is a schematic view of an air conditioner indoor unit according to a third embodiment of the present utility model;

fig. 4 is a schematic view of an air conditioner indoor unit according to a fourth embodiment of the present utility model;

fig. 5 is a schematic view of an air conditioner indoor unit according to a fifth embodiment of the present utility model.

Reference numerals:

the air conditioning indoor unit 1, the evaporator 10, the first port 11, the second port 12, the supercooling member 20, the first flow passage 21, the second flow passage 22, the first throttle member 30, the first refrigerant pipe 40, the third port 41, the fourth port 42, the second refrigerant pipe 50, the first communication pipe 60, the check valve 70, the second communication pipe 80, the second throttle member 81, the first temperature sensor 91, the second temperature sensor 92, and the blower 93.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure experiences a position flip or a change in attitude or a change in state of motion, then the indications of these directivities also correspondingly change, for example: an element described as "under" or "beneath" another element or feature would then be oriented "over" or "above" the other element or feature. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

Fig. 1 is a schematic view of an air conditioner indoor unit according to a first embodiment; fig. 2 is a schematic view of an air conditioner indoor unit according to a second embodiment; fig. 3 is a schematic view of an air conditioner indoor unit according to a third embodiment; fig. 4 is a schematic view of an air conditioner indoor unit according to a fourth embodiment; fig. 5 is a schematic view of an air conditioner indoor unit according to a fifth embodiment.

As shown in fig. 1 to 5, the air conditioner 1 according to the embodiment of the utility model includes an evaporator 10, a supercooling member 20, a first throttling member 30, a first refrigerant pipe 40 and a second refrigerant pipe 50, the evaporator 10 includes a first port 11 and a second port 12, a first end of the first refrigerant pipe 40 is used for being connected with a first stop valve, a second end of the first refrigerant pipe 40 is communicated with the first port 11, a first end of the second refrigerant pipe 50 is used for being connected with a second stop valve, a second end of the second refrigerant pipe 50, the first throttling member 30 and the second port 12 are sequentially communicated, the supercooling member 20 defines a first flow passage 21 and a second flow passage 22 which can exchange heat with each other, two ends of the first flow passage 21 are respectively communicated with the second refrigerant pipe 50 and the first throttling member 30, the first flow passage 21 is used for flowing a liquid refrigerant, and the second flow passage 22 is used for flowing a medium which absorbs heat of the liquid refrigerant.

In terms of expansion, when the air conditioner 1 is refrigerating, the first end of the second refrigerant pipe 50 flows into the high-pressure liquid refrigerant, the high-pressure liquid refrigerant flows out from the second end of the second refrigerant pipe 50, flows through the cold piece 20, the first throttling piece 30 and enters the evaporator 10 from the second port 12, heat is exchanged between the high-pressure liquid refrigerant in the first flow channel 21 and the medium in the second flow channel 22, so that the high-pressure liquid refrigerant in the first flow channel 21 is further supercooled (wherein the medium can be water, air or gaseous refrigerant), thereby ensuring that the high-pressure liquid refrigerant entering the first throttling piece 30 avoids the gas-liquid two-phase flow state, the low-pressure liquid refrigerant is changed into a low-pressure liquid refrigerant, the low-pressure liquid refrigerant enters the evaporator 10 and is changed into a low-pressure gas refrigerant, the process is to absorb heat, the absorbed heat is from the outside of the evaporator 10, so that the temperature reduction is realized, the low-pressure gas refrigerant flows out of the evaporator 10 through the first port 11 and finally enters the first refrigerant pipe 40 to flow to the first stop valve, the low-pressure gas refrigerant finally enters the compressor of the air conditioner external machine to be compressed and is changed into a high-temperature high-pressure gas refrigerant, the high-pressure gas refrigerant enters the condenser, the refrigerant exchanges heat with outdoor air and is cooled into a high-temperature high-pressure liquid refrigerant, and then the high-pressure gas refrigerant enters the air conditioner internal machine 1 through the second stop valve to be started for the next circulation.

The circulation process can be simplified into the following process when refrigerating: the refrigerant is changed from a low-temperature low-pressure gaseous refrigerant to a high-temperature high-pressure gaseous refrigerant (completed in the compressor), a high-temperature high-pressure gaseous refrigerant to a high-temperature high-pressure liquid refrigerant (completed in the condenser), a high-temperature high-pressure liquid refrigerant to a low-pressure liquid refrigerant (completed in the low-pressure throttling member), and a low-pressure liquid refrigerant to a low-temperature low-pressure gaseous refrigerant (completed in the evaporator 10).

When the high-pressure liquid refrigerant flows through the first throttling element 30, a part of static pressure is converted into dynamic pressure, the flow speed is increased sharply, turbulence is formed, fluid is disturbed, friction resistance is increased, static pressure is reduced, if the refrigerant in a gas-liquid two-phase state flows through the first throttling element 30, liquid is gasified and bubbles are generated, the pressure of the gas-liquid two-phase flow is recovered gradually when the bubbles leave the throttling position, the bubbles are crushed, the local pressure of the crushed bubbles is huge, high noise and vibration are generated when the first throttling element 30 is impacted, and meanwhile, extremely serious cavitation phenomenon is generated in the first throttling element 30.

The process of continuing to release heat in the saturated state to make the temperature of the liquid drop below the saturation temperature under the pressure is called supercooling, wherein the manner in which the supercooling member 20 increases the high-pressure refrigerant entering the first throttling element 30 can be through making the high-pressure refrigerant exchange heat with the medium capable of absorbing the heat of the high-pressure refrigerant, so that the medium takes away the heat of the high-pressure refrigerant, and the high-pressure refrigerant is further cooled, so as to avoid the flash gas generated by the flowing of the high-pressure refrigerant in the second refrigerant pipe 50, and reduce the flowing pressure drop, and the medium can be water or air; in addition, the flash gas in the throttling process of the high-pressure refrigerant in the first throttling element 30 can be reduced, the refrigerating capacity of the first throttling element 30 is improved, and the unit refrigerating capacity of the supercooled refrigerant is improved.

The evaporator 10 may be configured in three types of water-cooled, air-cooled, water and air-mixed cooled.

The first throttling element 30 may be configured as a throttling electronic expansion valve or a capillary tube or the like having a throttling effect.

As shown in fig. 1 and 2, the air conditioner 1 further includes a blower 93, and the blower 93 is disposed opposite to the evaporator 10.

According to the air conditioner indoor unit 1 of the embodiment of the utility model, when the air conditioner indoor unit 1 is in refrigeration, the liquid refrigerant exchanges heat with the medium in the second flow passage 22 in the supercooling member 20 before entering the first throttling member 30 to realize further cooling, so that the supercooling degree of the liquid refrigerant before throttling is improved, the liquid refrigerant is prevented from being in a gas-liquid two-phase flow state, the effect of improving noise is achieved, the air conditioner indoor unit 1 has a simple structure and a good effect, is suitable for the air conditioner indoor units 1 of a multi-split air conditioner system, and ensures the supercooling degree of each air conditioner indoor unit 1.

As shown in fig. 1 to 4, according to an embodiment of the present utility model,

embodiment one:

as shown in fig. 1, in some embodiments, two ends of the second flow passage 22 are respectively communicated with the first port 11 and the first refrigerant pipe 40, so that when the air conditioner 1 is refrigerating, the low-pressure gaseous refrigerant flowing out through the first port 11 of the evaporator 10 enters the second flow passage 22 to exchange heat with the high-pressure liquid refrigerant in the first flow passage 21, so that the high-pressure liquid refrigerant in the first flow passage 21 is further cooled, the supercooling degree before throttling of the liquid refrigerant is improved, and the effect of improving noise is achieved.

Embodiment two:

as shown in fig. 2, in some embodiments, two ends of the second flow channel 22 are respectively connected to the first refrigerant pipe 40 in parallel, and a check valve 70 or an on-off valve is disposed between the second flow channel 22 and the first refrigerant pipe 40. When the air conditioner indoor unit 1 is in refrigeration, a part of low-temperature low-pressure gaseous refrigerant flowing out of the evaporator 10 flows into the first stop valve through the first refrigerant pipe 40, and the part of the gaseous refrigerant is split into the second flow passage 22, flows to the first stop valve together with the other gaseous refrigerants after exchanging heat with the liquid refrigerant in the first flow passage 21, and the high-pressure liquid refrigerant is further cooled, so that the supercooling degree of the liquid refrigerant before throttling is improved, and the effect of improving noise is achieved.

When the check valve 70 or the on-off valve is provided between the second flow path 22 and the first refrigerant pipe 40, the gas refrigerant flowing in through the first refrigerant pipe 40 is prevented from being split into the second flow path 22 when the air conditioner 1 is in the heating state, so that the on-off between the second flow path 22 and the first refrigerant pipe 40 can be realized.

In some embodiments, the first refrigerant tube 40 is connected in parallel with the second flow channel 22 at a position of the third port 41 and the fourth port 42, respectively, and the first end, the third port 41, the fourth port 42 and the second end of the first refrigerant tube 40 are sequentially arranged along the flow sequence of the refrigerant, and the check valve 70 or the on-off valve is disposed between the third port 41 and the second flow channel 22.

That is, during heating, the air conditioning unit 1 sequentially passes the first end, the third port 41, the fourth port 42, and the second end of the first refrigerant pipe 40 along the flow order of the refrigerant, and during cooling, the air conditioning unit 1 sequentially passes the second end, the fourth port 42, the third port 41, and the first end of the first refrigerant pipe 40 along the flow order of the refrigerant, and the gaseous refrigerant in the first refrigerant pipe 40 sequentially passes the second end, the fourth port 42, the third port 41, and the first end of the first refrigerant pipe 40. The check valve 70 or the on-off valve is disposed between the third port 41 and the second flow path 22, so that when the air conditioner 1 heats, the high-pressure liquid refrigerant enters the first refrigerant pipe 40 from the first end of the first refrigerant pipe 40, and then does not enter the second flow path 22 through the third port 41, thereby preventing the gas refrigerant from being split. When the on-off valve is provided between the third port 41 and the second flow passage 22, the on-off valve is controlled to be turned on when the air conditioning apparatus 1 is cooling, and the on-off valve is controlled to be turned off when the air conditioning apparatus 1 is heating.

Embodiment III:

as shown in fig. 3, in some embodiments, the air conditioner 1 further includes a first communication pipe 60, one end of the first communication pipe 60 is communicated with the second port 12, the other end of the first communication pipe 60 is communicated with one end of the second flow channel 22, the other end of the second flow channel 22 is communicated with the first refrigerant pipe 40, and a check valve 70 or a switch valve is arranged between the other end of the second flow channel 22 and the first refrigerant pipe 40. In this way, when the air conditioning indoor unit 1 is in refrigeration, after the liquid refrigerant is throttled by the first throttling element 30, part of the low-temperature low-pressure refrigerant enters the second flow passage 22, the high-pressure liquid refrigerant in the first flow passage 21 is supercooled, the supercooling degree of the high-pressure liquid refrigerant in the first flow passage 21 is increased, and the low-temperature low-pressure refrigerant in the second flow passage 22 absorbs heat and finally enters the first refrigerant pipe 40 to be merged with the gaseous refrigerant flowing out from the first port 11 of the evaporator 10 to flow to the first stop valve.

Embodiment four:

as shown in fig. 4, in some embodiments, the air conditioner 1 further includes a second communicating pipe 80, two ends of the second communicating pipe 80 are respectively communicated with the first throttling part 30 and one end of the second flow passage 22, a second throttling part 81 is provided on the second communicating pipe 80, and the other end of the second flow passage 22 is communicated with the first refrigerant pipe 40.

For expansion, part of the high-pressure liquid refrigerant is split into the second communicating pipe 80 before entering the first throttling part 30 for throttling, and is changed into the low-pressure liquid refrigerant after being throttled in the second throttling part 81, the low-pressure liquid refrigerant entering the second flow passage 22 exchanges heat with the high-pressure liquid refrigerant in the first flow passage 21, the supercooling degree of the high-pressure liquid refrigerant in the first flow passage 21 is increased, and noise is reduced when the high-pressure liquid refrigerant is throttled at the first throttling part 30. The low-pressure liquid refrigerant after absorbing heat in the second flow passage 22 flows out of the second flow passage 22 and finally enters the first refrigerant pipe 40, and flows to the first stop valve together with the gaseous refrigerant flowing out of the evaporator 10.

Wherein the second throttling element 81 may be configured as a throttling electronic expansion valve or a capillary tube or the like having a throttling effect.

According to the air conditioner 1 of the embodiment of the present utility model, the supercooling member 20 includes a first sub-pipe and a second sub-pipe, the first sub-pipe and the second sub-pipe extend in a spiral shape with the same rotation axis, the first sub-pipe defines a first flow passage 21, and the second sub-pipe defines a second flow passage 22. In this way, the structural arrangement of the supercooling member 20 can be simplified, the heat exchange areas of the first flow passage 21 and the second flow passage 22 can be increased, and the heat exchange efficiency of the first flow passage 21 and the second flow passage 22 can be improved.

In some embodiments, the first sub-line and the second sub-line extend side by side in the same direction of extension; in some embodiments, the first sub-line and the second sub-line extend in different directions and are staggered with respect to each other during the extending process, which is not limited in this application.

In some embodiments, the subcooler 20 includes a first sub-line and a second sub-line, one of which defines a first flow passage 21 and the other of which defines a second flow passage 22, the first sub-line being nested outside the second sub-line. In this way, when the second flow passage 22 is defined as the second sub-pipeline, the first flow passage 21 is defined as the first sub-pipeline, and the second flow passage 22 is arranged in the first flow passage 21 in a penetrating manner and is spaced from the first flow passage 21, so that the heat exchange area of the first flow passage 21 and the second flow passage 22 can be increased, and the heat exchange efficiency of the first flow passage 21 and the second flow passage 22 is improved.

Or when the second flow passage 22 is defined as the first sub-pipeline, the first flow passage 21 is defined as the second sub-pipeline, and the first flow passage 21 is arranged in the second flow passage 22 in a penetrating manner and is spaced from the second flow passage 22, so that the heat exchange area of the first flow passage 21 and the second flow passage 22 can be increased, and the heat exchange efficiency of the first flow passage 21 and the second flow passage 22 is improved.

In some embodiments, the subcooler 20 is configured as a plate heat exchanger defining a first flow passage 21 and a second flow passage 22.

Fifth embodiment:

as shown in fig. 5, according to the air conditioner 1 of the embodiment of the utility model, a plurality of first fins are sleeved on the supercooling member 20, the evaporator 10 comprises a plurality of second fins and a heat exchange tube penetrating through the second fins, the supercooling member 20 is communicated with the heat exchange tube, and the first fins and the second fins are fixedly connected. In this way, the supercooling member 20 and the evaporator 10 can be assembled together at the time of manufacture, and the structural arrangement can be simplified, and the space occupation can be reduced.

In a specific embodiment, the supercooling member 20 and the evaporator 10 may be assembled together during manufacturing, and the structure of the present application may be realized by only modifying the existing evaporator 10 and connecting the first throttling member 30 in series between two adjacent heat exchange tubes arranged in parallel.

As shown in fig. 1 and 2, according to the air conditioner 1 of the embodiment of the present utility model, a first temperature sensor 91 is provided on the first refrigerant pipe 40, and a second temperature sensor 92 is provided on the second refrigerant pipe 50. The first temperature sensor 91 and the second temperature sensor 92 can feed back the temperature of the refrigerant in the first refrigerant pipe 40 and the temperature of the refrigerant in the second refrigerant pipe 50, so that the operation power of the air conditioner external unit can be synchronously adjusted according to the detected temperatures of the first temperature sensor 91 and the second temperature sensor 92 to ensure the supercooling degree of the high-pressure liquid refrigerant.

The multi-split air conditioning system comprises an air conditioner external unit and the air conditioner internal unit 1, wherein a compressor and a condenser communicated with the compressor are arranged in the air conditioner external unit, the condenser is communicated with a first stop valve, and the compressor is also communicated with a second stop valve.

According to the multi-split air conditioning system provided by the embodiment of the utility model, when the air conditioning indoor unit 1 is in refrigeration, the liquid refrigerant is further cooled in the supercooling piece 20 before entering the first throttling piece 30, the supercooling degree of the liquid refrigerant before throttling is improved, the liquid refrigerant is prevented from being in a gas-liquid two-phase flow state, the effect of improving noise is achieved, the structure is simple, the effect is good, the multi-split air conditioning system is suitable for the air conditioning indoor units 1 of the multi-split air conditioning system, and the supercooling degree of each air conditioning indoor unit 1 can be ensured.

In the description of the present utility model, it should also be understood that features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims (10)

1. The utility model provides an air conditioner internal unit, its characterized in that includes evaporimeter, supercooling spare, first throttling element, first refrigerant pipe and second refrigerant pipe, the evaporimeter includes first mouth and second mouth, the first end of first refrigerant pipe is used for being connected with first stop valve, the second end of first refrigerant pipe with first mouth intercommunication, the first end of second refrigerant pipe is used for being connected with the second stop valve, the second end of second refrigerant pipe, first throttling element and the second mouth communicates in proper order, the supercooling spare is limited first runner and the second runner that can exchange heat each other, the both ends of first runner respectively with second refrigerant pipe with first throttling element intercommunication, first runner is used for supplying liquid refrigerant to flow, the second runner is used for supplying to absorb the medium flow of the heat of liquid refrigerant.

2. The air conditioner indoor set of claim 1, wherein both ends of the second flow passage are respectively communicated with the first port and the first refrigerant pipe.

3. The air conditioner indoor set of claim 1, wherein two ends of the second flow passage are respectively connected to the first refrigerant pipe in parallel, and a one-way valve or a switch valve is arranged between the second flow passage and the first refrigerant pipe.

4. The air conditioner indoor set according to claim 3, wherein the parallel connection position of the first refrigerant pipe and the second flow passage is a third port and a fourth port, the first end, the third port, the fourth port and the second end of the first refrigerant pipe are sequentially arranged along the flow sequence of the refrigerant, and the one-way valve or the switch valve is arranged between the third port and the second flow passage.

5. The air conditioner indoor unit of claim 1, further comprising a first communication pipe, wherein one end of the first communication pipe is communicated with the second port, the other end of the first communication pipe is communicated with one end of the second flow passage, the other end of the second flow passage is communicated with the first refrigerant pipe, and a one-way valve or a switch valve is arranged between the other end of the second flow passage and the first refrigerant pipe.

6. The air conditioner indoor set of claim 1, further comprising a second communicating pipe, wherein two ends of the second communicating pipe are respectively communicated with the first throttling element and one end of the second flow passage, a second throttling element is arranged on the second communicating pipe, and the other end of the second flow passage is communicated with the first refrigerant pipe.

7. The air conditioner indoor set of any one of claims 2-6, wherein the subcooling member comprises a first sub-pipe and a second sub-pipe, the first sub-pipe and the second sub-pipe extending in a spiral with the same rotation axis, the first sub-pipe defining the first flow passage, the second sub-pipe defining the second flow passage; or (b)

The supercooling piece comprises a first sub-pipeline and a second sub-pipeline, the first sub-pipeline is sleeved outside the second sub-pipeline, one of the first sub-pipeline and the second sub-pipeline is limited with the first flow channel, and the other of the first sub-pipeline and the second sub-pipeline is limited with the second flow channel.

8. The air conditioner indoor unit of claim 1, wherein the supercooling member is sleeved with a plurality of first fins, the evaporator comprises a plurality of second fins and heat exchange tubes penetrating through the second fins, the supercooling member is communicated with the heat exchange tubes, and the first fins and the second fins are fixedly connected.

9. The air conditioner indoor set of claim 1, wherein a first temperature sensor is provided on the first refrigerant pipe, and a second temperature sensor is provided on the second refrigerant pipe.

10. A multi-split air conditioning system, comprising an air conditioner external unit and an air conditioner internal unit according to any one of claims 1-9, wherein a compressor and a condenser communicated with the compressor are arranged in the air conditioner external unit, the condenser is used for being communicated with the first stop valve, and the compressor is also used for being communicated with the second stop valve.