CN206739672U - Air conditioner - Google Patents

Abstract

The utility model discloses air conditioner, including：Compressor, compressor have exhaust outlet and gas returning port；Commutate component, and commutation component has the first valve port to the 4th valve port；Indoor heat exchanger, the first end of indoor heat exchanger are connected with the 3rd valve port；Outdoor heat exchanger, the first end of outdoor heat exchanger are connected with the second valve port；Capillary module, capillary module includes the first capillary, the second capillary and transition conduit, the first end of first capillary is connected with the second end of indoor heat exchanger, the first end of second capillary is connected with the second end of outdoor heat exchanger, and transition conduit is connected between the second end of the first capillary and the second end of the second capillary；The internal diameter of transition conduit is more than the internal diameter of the first capillary and the second capillary, and the length of the first capillary is not less than the length of the second capillary.Air conditioner of the present utility model, advantageously ensure that the oil temperature of the lubricating oil in refrigerant is higher than its pour point temperature, so as to avoid the first capillary and the second capillary from being blocked.

Description

Air conditioner

Technical field

Technical field of heat exchange is the utility model is related to, more particularly, to a kind of air conditioner.

Background technology

Air conditioner particularly heat pump air conditioner using R290 as refrigerant by charging amount due to being limited, same ability The complete machine of section is much smaller compared to the air-conditioning using other refrigerants, charging amount.In order to meet refrigerating capacity and efficiency requirement, this Kind air conditioner must use huge discharge compressor and the heat exchanger of large area.

When this air conditioner uses capillary as throttling arrangement, when defrost terminates to change into heating mode, due to capillary Temperature is less than the pour point temperature of R290 lubricating oil for a long time at pipe, and lubricating oil can produce cotton-shaped stream, and even hair is blocked when serious Tubule, causes the failure of air conditioner, and the reliability that air conditioner uses is low.

Utility model content

The utility model is intended at least solve one of technical problem present in prior art.Therefore, the utility model carries Go out a kind of air conditioner, the air conditioner can avoid the first capillary of capillary module and the second capillary from being blocked, and improve empty The reliability for adjusting device to use, reduce the fault rate of air conditioner.

According to the air conditioner of the utility model embodiment, the air conditioner uses R290 as refrigerant, the air conditioner Including：Compressor, the compressor have exhaust outlet and gas returning port；Commutate component, and the commutation component has the first valve port extremely 4th valve port, first valve port connect with one of switching in the second valve port and the 3rd valve port, the 4th valve port with Second valve port connects with another switching in the 3rd valve port, and first valve port is connected with the exhaust outlet, institute The 4th valve port is stated with the gas returning port to be connected；Indoor heat exchanger, the first end of the indoor heat exchanger and the 3rd valve port phase Even；Outdoor heat exchanger, the first end of the outdoor heat exchanger are connected with second valve port；Capillary module, the capillary Component includes the first capillary, the second capillary and transition conduit, first end and the indoor heat exchanger of first capillary The second end be connected, the first end of second capillary is connected with the second end of the outdoor heat exchanger, and the transition conduit connects It is connected between the second end of first capillary and the second end of second capillary；Wherein, the internal diameter of the transition conduit More than first capillary and the internal diameter of second capillary, the length of first capillary is not less than described second mao The length of tubule.

According to the air conditioner of the utility model embodiment, by capillary module include the first capillary, second mao Tubule and transition conduit, while cause the internal diameter of transition conduit to be more than the internal diameter of the first capillary and the second capillary, and make first mao The length of tubule is not less than the length of the second capillary, so when air conditioner defrost pattern terminates to change into heating mode, refrigeration Agent advantageously ensures that the oil temperature of the lubricating oil in refrigerant is higher than its pour point temperature after being flowed out from indoor heat exchanger, so as to Avoid the first capillary and the second capillary from being blocked, reduce the fault rate of air conditioner, improve the reliability that air conditioner uses, prolong The service life of long air conditioner.

According to some embodiments of the utility model, the length of first capillary is more than the length of second capillary Degree.

According to some embodiments of the utility model, the length of first capillary is L, and L meets：L≤700mm.

According to some embodiments of the utility model, the transition conduit is horizontally disposed with.

According to some embodiments of the utility model, the internal diameter of the transition conduit is d1, first capillary and described The internal diameter of second capillary is that d2, the d1 and the d2 meet：D1 >=4mm, d2≤2.1mm.

According to some embodiments of the utility model, first capillary, the transition conduit and second capillary It is integrated part.

Alternatively, the transition conduit is copper pipe.

Alternatively, the commutation component is four-way valve.

According to some embodiments of the utility model, air conditioner also includes reservoir, and the reservoir is connected on described return Between gas port and the 4th valve port.

Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment Become obvious and be readily appreciated that, wherein：

Fig. 1 is the schematic diagram according to the air conditioner of the utility model some embodiments；

Fig. 2 is the schematic diagram according to the air conditioner of the utility model other embodiments.

Reference：

Air conditioner 100；

Compressor 1；Housing 11；Exhaust outlet A；Gas returning port B；Oil sump 12；

Commutate component 2；First valve port C；Second valve port D；3rd valve port E；4th valve port F；

Indoor heat exchanger 3；Outdoor heat exchanger 4；Heat exchanging piece 5；

Capillary module 6；First capillary 61；Transition conduit 62；Second capillary 63.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

In description of the present utility model, it is to be understood that term " length ", " on ", " under ", "left", "right", " water It is flat ", " top ", " bottom " " interior ", " outer ", the orientation of the instruction such as " radial direction " or position relationship is based on orientation shown in the drawings or position Relation, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply that signified device or element must There must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.This Outside, " first " is defined, one or more this feature can be expressed or be implicitly included to the feature of " second ".In this reality With in new description, it is necessary to explanation, unless otherwise clearly defined and limited, term " connected ", " connection " should be done extensively Reason and good sense solution, for example, it may be being fixedly connected or being detachably connected, or it is integrally connected；Can mechanically connect, It can be electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, can be the company of two element internals It is logical.For the ordinary skill in the art, it can understand that above-mentioned term is specific in the utility model with concrete condition Implication.

Air conditioner 100 below with reference to Fig. 1-Fig. 2 descriptions according to the utility model embodiment, air conditioner 100 can use R290 is as refrigerant, and air conditioner 100 can be used for adjusting indoor temperature, such as air conditioner 100 is used to indoor environment Heating or refrigeration.Alternatively, the air conditioner 100 can be heat pump air conditioner, such as the air conditioner 100 is heat pump convertible frequency air-conditioner.

As Figure 1-Figure 2, compressor 1, commutation component can be included according to the air conditioner 100 of the utility model embodiment 2nd, indoor heat exchanger 3, outdoor heat exchanger 4 and capillary module 6.

Specifically, as Figure 1-Figure 2, compressor 1 includes housing 11 and compression mechanism (not shown), compression mechanism bag Base bearing, supplementary bearing, bent axle and cylinder etc. are included, compression mechanism is located in housing 1, has oil sump 12 in housing 11, in oil sump 12 With lubricating oil, when compression mechanism works, lubricating oil can be lubricated to compression mechanism, can so as to improve compression mechanism work By property.

Alternatively, compressor 1 is low back pressure compressor.

Housing 11 has exhaust outlet A and gas returning port B, and the refrigerant after heat exchange can return to compressor by gas returning port B, system Cryogen can discharge after the cylinder compression of compressor 1 from exhaust outlet A.

Here it is possible to understand, because lubrication, such exhaust outlet are played a part of in work of the lubricating oil to compression mechanism A small amount of lubricating oil is all inevitably mixed with the refrigerant of A discharges, therefore, this paper refrigerant refers to be mixed with a small quantity The refrigerant of lubricating oil.

The component 2 that commutates has the first valve port C to the 4th valve port F, wherein, the first valve port C and the second valve port D and the 3rd valve port One of switching connection in E, the 4th valve port F connect with another switching in the second valve port D and the 3rd valve port E.Change speech It, when the first valve port C connects with the second valve port D, the 4th valve port F connects with the 3rd valve port E, when the first valve port C and the 3rd valve During mouth E connections, the 4th valve port F connects with the second valve port D.

First valve port C is connected with exhaust outlet A, and the 4th valve port F is connected with gas returning port B, so as to which commutation component 2 is connected into sky Adjust in the refrigerant loop of device 100 in order to the circulation of refrigerant.

Preferably, the component 2 that commutates is four-way valve, and when the component 2 that commutates powers off, the first valve port C connects with the second valve port D, 4th valve port F connects with the 3rd valve port E, and when the component 2 that commutates is powered, the first valve port C connects with the 3rd valve port E, the 4th valve port F Connected with the second valve port D, the concrete structure and operation principle on four-way valve are by as it is known to those skilled in the art that herein not Describe in detail again.But it is understood that commutation component 2 may be formed as other elements, as long as there is the first valve port C extremely 4th valve port F and commutation can be realized.

Because the first valve port C of the component 2 that commutates can connect with one of commutation in the second valve port D and the 3rd valve port E, 4th valve port F is connected to realize commutation with another commutation in the second valve port D and the 3rd valve port E, and this make it that air conditioner 100 can To be changed between refrigeration mode and heating mode, it is achieved thereby that the refrigerating function and heat-production functions of air conditioner 100.

The first end (for example, the left end shown in Fig. 1 and Fig. 2) of indoor heat exchanger 3 is connected with the 3rd valve port E, and outdoor is changed The first end (for example, the left end shown in Fig. 1 and Fig. 2) of hot device 4 is connected with the second valve port D, so as to by indoor heat exchanger 3 and room External heat exchanger 4 is connected in refrigerant flow path.

Capillary module 6 includes the first capillary 61, the second capillary 63 and transition conduit 62, and the first of the first capillary 61 End (for example, the lower end shown in Fig. 2) is connected with the second end (for example, the right-hand member shown in Fig. 2) of indoor heat exchanger 3, and second Second end of the first end (for example, the upper end shown in Fig. 2) of capillary 63 and outdoor heat exchanger 4 in Fig. 2 (for example, show Right-hand member) it is connected, transition conduit 62 is connected to the second end (such as the upper end shown in Fig. 2) and the second capillary of the first capillary 61 Between 63 the second end (for example, the lower end shown in Fig. 2), the first capillary 61 and the second capillary 63 can be to flowing through its system Cryogen carries out reducing pressure by regulating flow.

Specifically, as depicted in figs. 1 and 2, when air conditioner 100 is in refrigeration mode or defrost pattern, commutate component 2 The first valve port C connected with the second valve port D, the 3rd valve port E connects with the 4th valve port F, through compressor 1 compression after HTHP Refrigerant can pass through exhaust outlet A flow direction commutation component 2 the first valve port C, afterwards refrigerant through commutate component 2 the second valve port D enters outdoor heat exchanger 4, and carries out energy exchange with external environment in outdoor heat exchanger 4, is flowed out from outdoor heat exchanger 4 Refrigerant afterwards enters indoor heat exchanger 3 to inhale after flowing successively through the second capillary 63, the capillary 61 of transition conduit 62 and first Indoor heat is received, reduces the environment temperature of interior, the refrigerant flowed out from indoor heat exchanger 3 passes through the 3rd valve port E and the 4th Valve port F, and compressor 1 is returned to by the gas returning port B of compressor 1, it is reciprocal with this so as to form kind of refrigeration cycle.

As depicted in figs. 1 and 2, when air conditioner 100 is in heating mode, the first valve port C and the 3rd valve of the component 2 that commutates Mouthful E connection and the 4th valve port F connects with the second valve port D, the refrigerant of the HTHP after the cylinder compression of compressor 1 is from row Gas port A is discharged, and is then flowed through the first valve port C and the 3rd valve port E and is entered indoor heat exchanger 3, and indoors in heat exchanger 3 with room Interior environment is exchanged heat, and the refrigerant after being exchanged heat with indoor heat exchanger 3 flows successively through the first capillary 61, transition conduit 62 and second Outdoor heat exchanger 4 is entered after capillary 63, refrigerant is exchanged heat with outdoor environment in outdoor heat exchanger 4, changed with outdoor Cold-producing medium stream after hot device 4 exchanges heat returns to compression through the second valve port D and the 4th valve port F, and by the gas returning port B of compressor 1 Machine 1, it is reciprocal with this, form the heating circulation of air conditioner 100.

Specifically, the internal diameter of transition conduit 62 is more than the internal diameter of the first capillary 61 and the second capillary 63, that is to say, that mistake The internal diameter for crossing pipe 62 is more than the internal diameter of the second capillary 63 more than the internal diameter of the first capillary 61 and the internal diameter of transition conduit 62.Example Such as, the first capillary 61 is identical with the internal diameter of the second capillary 63, and the internal diameter of transition conduit 62 is more than the first capillary 61 and the The internal diameter of two capillaries 63.

The length of first capillary 61 is not less than the length of the second capillary 63.That is, the length of the second capillary 63 Length of the degree no more than the first capillary 61.For example, the length of the first capillary 61 is more than the length of the second capillary 63.Again Such as, the length of the first capillary 61 is equal to the length of the second capillary 63.

Specifically, inventor has found in practical study, and temperature characterisitic of the refrigerant in capillary region is to freeze Agent is from capillary is entered to during being flowed out from capillary, and the temperature of refrigerant is first in being basically unchanged, when refrigerant is in hair After circulation distance in tubule reaches specific range, the temperature of refrigerant starts rapid reduction (i.e. steep drop).

According to the air conditioner of the utility model embodiment, one in correlation technique is replaced by using capillary module 6 Capillary, the length of the length of such capillary 63 of first capillary 61 and second than one capillary is small, so as to When the defrost pattern of air conditioner 100 terminates to change into heating mode, refrigerant is flowing to the process of transition conduit 62 from the first capillary 61 In, advantageously ensure that temperature of the refrigerant in the first capillary 61 is in the state being basically unchanged and advantageously ensures that refrigerant Entered before its temperature steep drop in transition conduit 62, so as to avoid to a certain extent because of the temperature of the lubricating oil in refrigerant Degree produces cotton-shaped stream less than the pour point temperature of lubricating oil.

Even so, even if the temperature of refrigerant steep drop in the first capillary 61 causes lubricating oil in refrigerant the Cotton-shaped stream is generated in one capillary 61, because the internal diameter of transition conduit 62 is than the first capillary 61 and the internal diameter of the second capillary 63 Greatly, so as to which cotton-shaped stream also can be flowed into relatively easily in transition conduit 62 and is temporarily stored within transition conduit 62, and due to transition conduit The 62 effect very littles for not having the effect that reducing pressure by regulating flow is carried out to refrigerant or a reducing pressure by regulating flow (such as transition conduit 62 is non-capillary Pipe), therefore temperature of the refrigerant in transition conduit 62 can be slightly increased, the lubricating oil so contributed in transition conduit 62 heats up, So that the temperature of lubricating oil is higher than pour point temperature, then the refrigerant in transition conduit 62 is flowing to the second capillary from transition conduit 62 The risk that lubricating oil blocks the second capillary 63 is also reduced during pipe 63.

Further, because the length of the second capillary 63 is not more than the length of the first capillary 61, so as in not shadow The length to shortening the second capillary 63 on the basis of refrigerant progress reducing pressure by regulating flow is rung, is so advantageous to avoid in refrigerant Lubricating oil produces cotton-shaped stream in the second capillary 63, so as to further avoid the second capillary 63 from being blocked.

In brief, according to the air conditioner 100 of the utility model embodiment, first is included by capillary module 6 Capillary 61, the second capillary 63 and transition conduit 62, while cause the internal diameter of transition conduit 62 to be more than the first capillary 61 and second The internal diameter of capillary 63, and the length of the first capillary 61 is not less than the length of the second capillary 63, so in air conditioner 100 When defrost pattern terminates to change into heating mode, refrigerant advantageously ensures that the profit in refrigerant after the outflow of indoor heat exchanger 3 The oil temperature of lubricating oil is higher than its pour point temperature, so as to avoid the first capillary 61 and the second capillary 63 from being blocked, reduces air-conditioning The fault rate of device 100, the reliability that air conditioner 100 uses is improved, extend the service life of air conditioner 100.

Preferably, the length of the first capillary 61 is more than the length of the second capillary 63.So as to further limit second mao The length of tubule 63, shorten circulation distance of the refrigerant in the second capillary 63, further reduce in the defrost mould of air conditioner 100 Lubricating oil when formula terminates to change into heating mode in refrigerant blocks the risk of the second capillary 63.

In order to further avoid the lubricating oil when the defrost pattern of air conditioner 100 terminates to change into heating mode in refrigerant from blocking up The first capillary 61 is filled in, the length L of the first capillary 61 can be defined to：L≤700mm.It is understood that when the first capillary The length L of pipe 61 meets：During L≤700mm, the length of the second capillary 63 is again smaller than equal to 700mm and the second capillary 63 Length is not more than the length of the first capillary 61.For example, when the length of the first capillary 61 is 690mm, the second capillary 63 Length can be 650mm, 600mm or 620mm etc..And for example, when the length of the first capillary 61 is 650mm, the second capillary 63 length can be 550mm, 580mm or 630mm.So as to be advantageous to further avoid terminating in the defrost pattern of air conditioner 100 Refrigerant produces the phenomenon of temperature steep drop in the first capillary 61 or the second capillary 63 when changing into heating mode, and then enters one Step avoids lubricating oil from being formed as cotton-shaped stream.

In some further embodiments of the present utility model, transition conduit 62 is horizontally disposed.Pass through the water of transition conduit 62 It is flat to set, velocity of liquid assets of the refrigerant in transition conduit 62 can be largely reduced, so as to extend refrigerant in transition conduit 62 The interior currency, be so advantageous to further heating up for the lubricating oil in transition conduit 62, avoid in the defrost pattern of air conditioner 100 End changes into cotton-shaped stream during heating mode and blocks the second capillary 63.Certainly, the utility model not limited to this, transition conduit 62 may be used also To be obliquely installed, for example, the angle between the bearing of trend and horizontal plane of transition conduit 62 is α, α meets：0 ° of ＜ α≤90 °, example Such as, α is 15 °, 20 °, 30 °, 60 ° or 45 °.

According to some examples of the present utility model, the internal diameter of transition conduit 62 is d1, the first capillary 61 and the second capillary 63 internal diameter is that d2, d1 and d2 meet：D1 >=4mm, d2≤2.1mm.Thus, terminate to change into system in the defrost pattern of air conditioner 100 During heat pattern, be advantageous to further avoid to produce cotton-shaped stream in the first capillary 61 and the second capillary 63, so as to further Avoid the first capillary 61 and the second capillary 63 from being blocked, and then further reduce the fault rate of air conditioner 100, improve air-conditioning The reliability that device 100 uses, extend the service life of air conditioner 100.

Alternatively, d1 >=5.5mm, d2≤2.0mm.Further, d1 >=6mm, d2≤1.5mm.More preferably, d1 >=6mm, d2≤1.0mm。

Alternatively, the first capillary 61, the capillary 63 of transition conduit 62 and second are integrated part.It is thus, not only simple in construction, The production technology to capillary module 6 can be simplified, reduce production cost, but also capillary module 6 can be simplified in air-conditioning Installation process in device 100.

Preferably, transition conduit 62 is copper pipe.Thus, be advantageous to improve copper pipe and the heat exchange efficiency of surrounding environment, so as to enter One step reduces risk of the oil temperature less than pour point temperature of the lubricating oil at transition conduit 62.

Specifically, cylinder has exhaust passage and air intake passage, and air intake passage is connected with gas returning port B, the refrigeration after heat exchange Agent can be returned in the cylinder of compressor 1 from gas returning port B and air intake passage, and refrigerant can form high temperature after being compressed in cylinder The refrigerant of high pressure, and discharge compressor 1 by exhaust passage and exhaust outlet A successively.

As shown in figure 1, air conditioner 100 also includes heat exchanging piece 5, the both ends of heat exchanging piece 5 respectively with exhaust outlet A and exhaust passage It is connected, heat exchanging piece 5 is at least partially immersed in the lubricating oil in oil sump 12, and thus, the refrigerant after cylinder compression is logical from exhaust Heat exchanging piece 5 can be flowed first to after road discharge, refrigerant is exchanged heat to heat profit in heat exchanging piece 5 with the lubricating oil in oil sump 12 Lubricating oil, subsequent refrigerant discharge compressor 1 from exhaust outlet A.

Thus, no matter which kind of operational mode air conditioner 100 is in, the refrigerant of the exhaust passage discharge of cylinder flows first Cross heat exchanging piece 5, the refrigerant in such heat exchanging piece 5 can heat to the lubricating oil in oil sump 12, so as to improve oil sump 12 The oil temperature of interior lubricating oil, so when the defrost pattern of air conditioner 100 terminates to change into heating mode, refrigerant is from indoor heat exchanger 3 outflows and when flowing through the first capillary 61 and the second capillary 63 of capillary module 6, can be further ensured that in refrigerant and mix The oil temperature of lubricating oil be not less than its pour point temperature, so as to further avoid the first capillary 61 and the second capillary 63 from being blocked Plug, the fault rate of air conditioner 100 is further reduced, improve the reliability that air conditioner 100 uses, extend the use of air conditioner 100 Life-span.

According to the air conditioner 100 of the utility model embodiment, by using the exhaust of cylinder to the lubricating oil in oil sump 12 Heated, so as to improve the oil temperature of lubricating oil, so when the defrost pattern of air conditioner 100 terminates to change into heating mode, system When cryogen flows out from indoor heat exchanger 3 and flows through the first capillary 61 and the second capillary 63, the system of being blended in can be further ensured that The oil temperature of lubricating oil in cryogen is not less than its pour point temperature, so as to further avoid the first capillary 61 and the second capillary 63 are blocked, and further reduce the fault rate of air conditioner 100, improve the reliability that air conditioner 100 uses, and extend air conditioner 100 Service life.

Alternatively, heat exchanging piece 5 is heat exchanger tube, such as heat exchanging piece 5 is coil pipe or flat tube etc..It is, of course, understood that Heat exchanging piece 5 may be formed as other structures, such as heat exchanging piece 5 is heat exchanger, refrigerant and energy as long as heat exchanging piece 5 can circulate Enough realize the heat exchange between refrigerant and lubricating oil.

Preferably, heat exchanger tube is copper pipe, thus, the good heat conductivity of heat exchanger tube, heat exchange efficiency height.

According to some embodiments of the utility model, air conditioner 100 also includes reservoir (not shown), reservoir series connection Between gas returning port B and the 4th valve port F.Thus, the refrigerant after heat exchange can flow to reservoir after the 4th valve port F outflows, and Liquid refrigerant in the refrigerant flowed into reservoir can be stored in reservoir, and gaseous refrigerant can return by gas returning port B Compressor 1 is returned to, this is not only easy to adjust the refrigerant flow in refrigerant flow path, is also prevented from compressor 1 and produces liquid hammer Phenomenon.

In the description of this specification, the description meaning of reference term " some embodiments ", " example " or " some examples " etc. Refer to and be contained in of the present utility model at least one with reference to specific features, structure, material or the feature that the embodiment or example describe In individual embodiment or example.In this manual, identical implementation is necessarily directed to the schematic representation of above-mentioned term Example or example.Moreover, specific features, structure, material or the feature of description can be in any one or more embodiments or examples In combine in an appropriate manner.In addition, in the case of not conflicting, those skilled in the art can be by this specification The different embodiments or example and the feature of different embodiments or example of description are combined and combined.

Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (9)

1. a kind of air conditioner, the air conditioner uses R290 as refrigerant, it is characterised in that the air conditioner includes：

Compressor, the compressor have exhaust outlet and gas returning port；

Commutate component, and the commutation component has the first valve port to the 4th valve port, first valve port and the second valve port and the 3rd One of switching connection in valve port, the 4th valve port are cut with another in second valve port and the 3rd valve port Connection is changed, first valve port is connected with the exhaust outlet, and the 4th valve port is connected with the gas returning port；

Indoor heat exchanger, the first end of the indoor heat exchanger are connected with the 3rd valve port；

Outdoor heat exchanger, the first end of the outdoor heat exchanger are connected with second valve port；

Capillary module, the capillary module include the first capillary, the second capillary and transition conduit, first capillary First end be connected with the second end of the indoor heat exchanger, the first end of second capillary and the outdoor heat exchanger Second end is connected, the transition conduit be connected to first capillary the second end and second capillary the second end it Between；

Wherein, the internal diameter of the transition conduit is more than the internal diameter of first capillary and second capillary, described first mao The length of tubule is not less than the length of second capillary.

2. air conditioner according to claim 1, it is characterised in that the length of first capillary is more than described second mao The length of tubule.

3. air conditioner according to claim 1, it is characterised in that the length of first capillary is L, and L meets：L≤ 700mm。

4. air conditioner according to claim 1, it is characterised in that the transition conduit is horizontally disposed with.

5. air conditioner according to claim 1, it is characterised in that the internal diameter of the transition conduit is d1, first capillary The internal diameter of pipe and second capillary is that d2, the d1 and the d2 meet：D1 >=4mm, d2≤2.1mm.

6. air conditioner according to claim 1, it is characterised in that first capillary, the transition conduit and described Two capillaries are integrated part.

7. air conditioner according to claim 1, it is characterised in that the transition conduit is copper pipe.

8. air conditioner according to claim 1, it is characterised in that the commutation component is four-way valve.

9. air conditioner according to claim 1, it is characterised in that also including reservoir, the reservoir is connected on described Between gas returning port and the 4th valve port.