CN106440434A

CN106440434A - Air conditioning system and control method thereof

Info

Publication number: CN106440434A
Application number: CN201610913398.7A
Authority: CN
Inventors: 刘博�
Original assignee: Midea Group Co Ltd; Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2016-10-19
Filing date: 2016-10-19
Publication date: 2017-02-22
Anticipated expiration: 2036-10-19
Also published as: CN106440434B

Abstract

The invention discloses an air conditioning system and a control method thereof. The air conditioning system comprises a compressor, a first reversing assembly, a first heat exchanger, a second heat exchanger, a throttling device, an inlet flow path capable of being connected and disconnected, a first outlet flow path and a second outlet flow path. The first reversing assembly comprises a first connector, a second connector, a third connector and a fourth connector. The first end of the first heat exchanger is connected with the second connector. The first end of the second heat exchanger is connected with the fourth connector. The throttling device is arranged between the second end of the first heat exchanger and the second end of the second heat exchanger. The first end of the inlet flow path is arranged between an outlet of the compressor and the first connector. The first end of the first outlet flow path and the first end of the second outlet flow path are connected with the inlet flow path in a switchable mode. The second end of the first outlet flow path is connected between the second end of the first heat exchanger and the throttling device, and the second end of the second outlet flow path is connected between the second end of the second heat exchanger and the throttling device. According to the air conditioning system, it can be guaranteed that the air conditioning system can still normally run in severe environments.

Description

Air-conditioning system and its control method

Technical field

The present invention relates to art of refrigeration units, especially relate to a kind of air-conditioning system and its control method.

Background technology

In correlation technique, air-conditioner under rugged environment, when such as outdoor environment temperature is higher than 60 DEG C (degree Celsius), air-conditioning Refrigeration mode opened by device, can be because compressor top cover temperature is too high, and the reason such as automatically controlled temperature exceeding standard is protected, and leads to air-conditioner Cannot normally run, when serious, even the automatically controlled case assembly of compressor, air-conditioner outdoor unit can be caused to burn；When outdoor environment temperature When degree is less than -20 DEG C, the condenser of air-conditioner outdoor unit usually cannot ensure heat exchange because frosting is excessive, thus leading to air-conditioning The heating effect of air conditioner indoor machine is inconspicuous.However, often in these extreme environments, we but to maintain room with greater need for air-conditioner Interior temperature, thereby ensure that air-conditioner normal operation in extremely rugged environment is necessary.

In correlation technique, former Normal practice is to arrange temperature sensor in the exhaust outlet of compressor, when compressor When delivery temperature exceedes a certain threshold value, the direct stoppage protection of compressor, to prevent it from burning.However, this safeguard measure is brought The drawbacks of be that air-conditioner cannot normally run, impact user use.

Content of the invention

It is contemplated that at least solving one of technical problem present in prior art.For this reason, one object of the present invention It is to propose a kind of air-conditioning system it is ensured that air-conditioning system remains to normally run in the presence of a harsh environment.

Further object is that proposing a kind of control method of above-mentioned air-conditioning system.

Air-conditioning system according to a first aspect of the present invention, including：Compressor, described compressor has inlet and outlet；The One commutation assembly, described first commutation assembly includes first interface to the 4th interface, in described first interface and the 3rd interface One of and second interface turns on, and another in described first interface and the 3rd interface is turned on described 4th interface, institute State first interface to be connected with described outlet, described 3rd interface is connected with described import；First Heat Exchanger, described First Heat Exchanger First end be connected with described second interface；Second heat exchanger, the first end of described second heat exchanger and described 4th interface phase Even；Throttling arrangement, described throttling arrangement be located at the second end of described First Heat Exchanger and described second heat exchanger the second end it Between；Can break-make inlet pathway, the first end of described inlet pathway is located at the described outlet of described compressor and described first and connects Between mouthful；First outlet stream and second outlet stream, the first end of described first outlet stream and described second outlet stream First end be switchably connected with the second end of described inlet pathway, the second end of described first outlet stream is connected to described Between described second end of First Heat Exchanger and described throttling arrangement, the second end of described second outlet stream is connected to described Between described second end of two heat exchangers and described throttling arrangement.

Air-conditioning system according to a first aspect of the present invention, by setting can break-make inlet pathway, and arrange and inlet flow First outlet stream and second outlet stream that road is switchably connected are it is ensured that air-conditioning system just remains in the presence of a harsh environment Often run.

According to some embodiments of the present invention, between the described outlet of described compressor and described first interface, it is provided with second Commutation assembly, described second commutation assembly includes the 5th and is interfaced to the 8th interface, the institute of described 5th interface and described compressor State outlet to be connected, the 6th interface is connected with the described first end of described inlet pathway, and the 7th interface is connected with described first interface, Described 6th is interfaced at least one of described 8th interface and described 5th interface conducting.

According to some embodiments of the present invention, described inlet pathway is provided with the first electric expansion valve.

According to some embodiments of the present invention, described inlet pathway is provided with stop valve.

According to some embodiments of the present invention, described second end of described inlet pathway is provided with the 3rd commutation assembly, described 3rd commutation assembly includes the first import, switchably first outlet and the second outlet with described first import conducting, described First import is connected with described second end of described inlet pathway, and described the of described first outlet and described first outlet stream One end is connected, and described second outlet is connected with the described first end of described second outlet stream.

Alternatively, described 3rd commutation assembly is triple valve.

According to some embodiments of the present invention, described throttling arrangement is electric expansion valve, capillary or capillary wick.

According to some embodiments of the present invention, described first commutation assembly is cross valve.

The control method of air-conditioning system according to a second aspect of the present invention, described air-conditioning system is according to the present invention above-mentioned The air-conditioning system of one side, described control method comprises the following steps：

When described air-conditioning system refrigerating operaton,

Detection outdoor environment temperature T₁；

As described outdoor environment temperature T₁During less than the first temperature predetermined threshold, control described first interface and described second Interface conducting and described 3rd interface and described 4th interface conducting, and control described inlet pathway to disconnect；

As described outdoor environment temperature T₁During more than or equal to described first temperature predetermined threshold, control described first interface with Described second interface conducting and described 3rd interface and described 4th interface conducting, control described inlet pathway conducting and make described One of conducting in inlet pathway and described first outlet stream and described second outlet stream；

When described air-conditioning system heating operation,

Detection outdoor environment temperature T₂；

As described outdoor environment temperature T₂During more than second temperature predetermined threshold, control described first interface and the described 4th Interface conducting and described second interface and described 3rd interface conducting, and control described inlet pathway to disconnect；

As described outdoor environment temperature T₂During less than or equal to described second temperature predetermined threshold, control described first interface with Described 4th interface conducting and described second interface and described 3rd interface conducting, control described inlet pathway conducting and make described Another conducting in inlet pathway and described first outlet stream and described second outlet stream.

According to some embodiments of the present invention, as described outdoor environment temperature T₁During more than the 3rd temperature predetermined threshold, control Make the described outlet of described compressor and described first interface disconnects, control described inlet pathway conducting and make described inlet pathway With the conducting of described first outlet stream, wherein said 3rd temperature predetermined threshold is more than described first temperature predetermined threshold；

As described outdoor environment temperature T₁More than or equal to described first temperature predetermined threshold, it is less than or equal to described 3rd temperature During predetermined threshold, the described first interface of control turns on described second interface and described 3rd interface is led with described 4th interface Logical, control described inlet pathway conducting and make described inlet pathway and described first outlet stream conducting.

Alternatively, the span of described first temperature predetermined threshold is 48 DEG C～52 DEG C, the predetermined threshold of described 3rd temperature The span of value is 58 DEG C～62 DEG C.

According to some embodiments of the present invention, as described outdoor environment temperature T₂During less than the 4th temperature predetermined threshold, control Make described first interface with described 4th interface conducting and described second interface is turned on described 3rd interface, control described import Stream every first the scheduled time turn on once, each conduction first predetermined hold-time, control described inlet pathway with Described second outlet stream conducting；

As described outdoor environment temperature T₂More than or equal to described 4th temperature predetermined threshold, it is less than or equal to described second temperature During predetermined threshold, control described first interface with described 4th interface conducting and described second interface is led with described 3rd interface Logical, control described inlet pathway to turn on once every second scheduled time, each conduction second predetermined hold-time, control Described inlet pathway and described second outlet stream conducting,

Wherein said 4th temperature predetermined threshold is less than described second temperature predetermined threshold, and described first scheduled time is less than Described second scheduled time, described first predetermined hold-time is more than or equal to described second predetermined hold-time.

Alternatively, the span of described second temperature predetermined threshold is 0 DEG C～-4 DEG C, described 4th temperature predetermined threshold Span be -18 DEG C～-22 DEG C.

Alternatively, the span of described first scheduled time is 25 minutes～35 minutes, and described first continues pre- timing Between span be 9 minutes～11 minutes；The span of described second scheduled time is 35 minutes～45 minutes, described the The span of two predetermined hold-time is 7 minutes～9 minutes.

The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description

The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below Substantially and easy to understand, wherein：

Fig. 1 is the schematic diagram of air-conditioning system according to embodiments of the present invention；

Fig. 2 is the schematic diagram of air-conditioning system in accordance with another embodiment of the present invention；

Fig. 3 is the schematic diagram of the air-conditioning system according to further embodiment of the present invention.

Reference：

100：Air-conditioning system；

1：Compressor；11：Import；12：Outlet；13：Reservoir；

2：First commutation assembly；21：First interface；22：Second interface；

23：3rd interface；24：4th interface；

3：First Heat Exchanger；4：Second heat exchanger；

5：Throttling arrangement；6：Inlet pathway；61：First electric expansion valve；62：Stop valve；

71：First outlet stream；72：Second outlet stream；

8：Second commutation assembly；81：5th interface；82：6th interface；

83：7th interface；84：8th interface；

9：3rd commutation assembly；91：First import；92：First outlet；93：Second outlet.

Specific embodiment

Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.

In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ", " axle To ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or position relationship, be only for It is easy to describe the present invention and simplifies description, rather than the device of instruction or hint indication or element must have a specific side Position, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In describing the invention, unless otherwise stated, " multiple " are meant that two Individual or two or more.

In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.

Below with reference to Fig. 1-Fig. 3, air-conditioning system 100 according to embodiments of the present invention is described.Air-conditioning system 100 can be for dividing Body formula air-conditioner.In the application explained below, with air-conditioning system 100 can as detachable air conditioner as a example illustrate. Certainly, it will be understood to those skilled in the art that air-conditioning system 100 can also be other types of air-conditioning system 100.

As shown in Figure 1-Figure 3, the air-conditioning system 100 such as detachable air conditioner of embodiment according to a first aspect of the present invention, Including compressor 1, first commutate assembly 2, First Heat Exchanger 3, the second heat exchanger 4, throttling arrangement 5, can break-make inlet pathway 6th, first outlet stream 71 and second outlet stream 72.

Compressor 1 has import 11 and outlet 12.The cold-producing medium to be compressed of low-temp low-pressure enters into compression by import 11 In machine 1, discharge from outlet 12 after compressor 1 is compressed into the cold-producing medium of HTHP.Alternatively, compressor 1 is rotary Compressor 1, but not limited to this.Further, produce liquid hammer to prevent liquid refrigerant from entering in compressor 1, permissible Reservoir 13 is set at the import 11 of compressor 1.

First commutation assembly 2 makes air-conditioning system 100 have refrigeration simultaneously and heat two kinds of functions.Specifically, the first commutation Assembly 2 includes first interface 21, second interface 22, the 3rd interface 23 and the 4th interface 24, first interface 21 and the 3rd interface 23 In one of turn on second interface 22, another in first interface 21 and the 3rd interface 23 is led with the 4th interface 24 Logical.That is, the 3rd interface 23 is turned on the 4th interface 24 when first interface 21 is turned on second interface 22, now air-conditioning System 100 can be with refrigerating operaton；When first interface 21 is turned on the 4th interface 24, the 3rd interface 23 is turned on second interface 22, Now air-conditioning system 100 can be with heating operation.First interface 21 is connected with the outlet 12 of compressor 1, the 3rd interface 23 and compression The import 11 of machine 1 is connected.Alternatively, the first commutation assembly 2 is cross valve.It is understood that the first commutation assembly 2 is acceptable It is capable of the part of above-mentioned conducting function for other.

The first end (for example, the upper end in Fig. 1-Fig. 3) of First Heat Exchanger 3 and the second interface 22 of the first commutation assembly 2 Be connected, the first end (for example, the left end in Fig. 1-Fig. 3) of the second heat exchanger 4 with first commutate assembly 2 the 4th interface 24 phase Even.When air-conditioning system 100 is detachable air conditioner, First Heat Exchanger 3 is outdoor heat exchanger (i.e. condenser), the second heat exchanger 4 is indoor heat exchanger (i.e. evaporimeter).

Throttling arrangement 5 is located at second end (for example, the lower end in Fig. 1-Fig. 3) of First Heat Exchanger 3 and the second heat exchanger 4 Between second end (for example, the right-hand member in Fig. 1-Fig. 3).Throttling arrangement 5 is used for playing reducing pressure by regulating flow to the cold-producing medium flowing through it Effect.Alternatively, throttling arrangement 5 is electric expansion valve, capillary or capillary wick etc..

Wherein, the first end (for example, the left end in Fig. 1-Fig. 3) of inlet pathway 6 is located at the outlet 12 and first of compressor 1 Between the first interface 21 of commutation assembly 2.The first end (for example, the left end in Fig. 1-Fig. 3) of first outlet stream 71 and second The first end (for example, the upper end in Fig. 1-Fig. 3) of outlet flow passage 72 and the second end of inlet pathway 6 are (for example, in Fig. 1-Fig. 3 Right-hand member) switchably it is connected.Here it is possible to according to the actual requirements, first outlet stream 71 is made to turn on inlet pathway 6, now Second outlet stream 72 is separated with inlet pathway 6；Or, so that second outlet stream 72 is turned on inlet pathway 6, now first goes out Mouth stream 71 is separated with inlet pathway 6.Second end (for example, the right-hand member in Fig. 1-Fig. 3) of first outlet stream 71 is connected to Between above-mentioned second end of one heat exchanger 3 and throttling arrangement 5, the second end of second outlet stream 72 is (for example, in Fig. 1-Fig. 3 Lower end) it is connected between above-mentioned second end of the second heat exchanger 4 and throttling arrangement 5.

When inlet pathway 6 turns on, the cold-producing medium discharged from the outlet 12 of compressor 1 can be flowed to by inlet pathway 6 First outlet stream 71 or second outlet stream 72.Cold-producing medium is to flow into first outlet stream 71 or flow into second outlet stream 72 is to turn on first outlet stream 71 or turn on second outlet stream 72 depending on inlet pathway 6.When inlet pathway 6 breaks When opening, the cold-producing medium discharged from the outlet 12 of compressor 1 can not flow to first outlet stream 71 and second by inlet pathway 6 and go out Mouthful stream 72, now air-conditioning system 100 can carry out the kind of refrigeration cycle of routine or heat circulation, commutated by compressor 1, first The circulation stream that assembly 2, First Heat Exchanger 3, the second heat exchanger 4 and throttling arrangement 5 are constituted, the specific works mistake of this circulation stream Journey is well known to those skilled in the art, will not be described here.

Here, it should be noted that the break-make of inlet pathway 6 and first outlet stream 71 and second outlet stream 72 Between switching can be according to the actual working environment concrete operations of air-conditioning system 100, to ensure that air-conditioning system 100 extremely disliking Also can normally run under bad environment.

Specifically, for example, when outdoor environment temperature high for example be higher than 60 DEG C when, for example split type sky of air-conditioning system 100 Adjust device refrigerating operaton, the first interface 21 of the first commutation assembly 2 is turned on and the 3rd interface 23 and the 4th interface with second interface 22 24 conductings, can make inlet pathway 6 turn on simultaneously, and so that inlet pathway 6 is turned on first outlet stream 71, thus, from compression The cold-producing medium of the HTHP that the outlet 12 of machine 1 is discharged can be divided into two-way flowing, and a road cold-producing medium is by the first commutation assembly 2 First interface 21 and second interface 22 condense cooling through First Heat Exchanger 3, and in addition a road cold-producing medium changes without First Heat Exchanger 3 Heat, but mixed in the exit of First Heat Exchanger 3 with an above-mentioned road cold-producing medium through first outlet stream 71 by inlet pathway 6 Enter throttling arrangement 5 reducing pressure by regulating flow afterwards, evaporate subsequently into the second heat exchanger 4, so that room temperature is reduced, the cold-producing medium after heat exchange Flow back in compressor 1 to enter again by the import 11 of compressor 1 by the 3rd interface 23 and the 4th interface 24 of the first commutation assembly 2 Row compression, the cold-producing medium after compression is discharged from the outlet 12 of compressor 1, is so moved in circles, to realize kind of refrigeration cycle.Here mistake Cheng Zhong, because an above-mentioned other road cold-producing medium is without First Heat Exchanger 3, thus the temperature of this road cold-producing medium is higher, thus carry Rise the refrigerant temperature after throttling arrangement 5 throttling, and then the temperature of the inlet and outlet of the second heat exchanger 4 all can raise, The indoor set heat transfer intensity of detachable air conditioner diminishes, and heat exchange amount reduces, and drives the inlet temperature of compressor 1 to raise, alleviates The load of the cylinder body of compressor 1, reduces the quantity of heat production of compressor 1, ensures that air-conditioning system 100 in hot environment Can be with even running.

When extremely low such as less than -20 DEG C of outdoor environment temperature, air-conditioning system 100 such as detachable air conditioner heats fortune OK, the first interface 21 of the first commutation assembly 2 is turned on the 4th interface 24 and second interface 22 is turned on the 3rd interface 23, simultaneously Inlet pathway 6 can be made to turn on, and so that inlet pathway 6 is turned on second outlet stream 72, thus, from the outlet 12 of compressor 1 The gas refrigerant of the HTHP discharged is divided into two-way：The first interface 21 of one tunnel the first commutation assembly 2 and the 4th interface 24 flow to the second heat exchanger 4, so that room is heated up, another road directly flows to second by inlet pathway 6 without the second heat exchanger 4 Outlet flow passage 72 enters throttling arrangement 5 reducing pressure by regulating flow with an above-mentioned road cold-producing medium after the exit of the second heat exchanger 4 mixes, so After entering First Heat Exchanger 3 heat exchange afterwards, the second interface 22 through the first commutation assembly 2 and the 3rd interface 23 flow to compressor 1, Send from the outlet 12 of compressor 1 again after being compressed in compressor 1, so move in circles, to realize heating circulation.In this process In, due to the cold-producing medium discharged from the outlet 12 of compressor 1, some does not enter into the second heat exchanger 4 and has been directly entered section Stream device 5, therefore improves the inlet temperature of First Heat Exchanger 3, is conducive to the off-premises station of detachable air conditioner under worst cold case The frost layer on interior First Heat Exchanger 3 surface is melted, thus ensure that the heat transfer effect of First Heat Exchanger 3, improves indoor set Heating capacity and the efficiency of air-conditioning system 100.

And work as outdoor environment temperature be less than 60 DEG C, such as 37 DEG C, 42 DEG C when, air-conditioning system 100 can carry out routine system Inlet pathway 6 now can be disconnected by SAPMAC method, and the cold-producing medium now discharged from the outlet 12 of compressor 1 all flows to first The first interface 21 of commutation assembly 2, and flow through First Heat Exchanger 3, throttling arrangement 5, the second heat exchanger 4 successively, and eventually through The import 11 of compressor 1 is back in compressor 1 and is compressed again.When outdoor environment temperature is higher than -20 DEG C, such as when 4 DEG C, Air-conditioning system 100 can carry out routine heat circulation, now equally inlet pathway 6 can be disconnected, from the outlet of compressor 1 The cold-producing medium of 12 discharges is all flowed to the first interface 21 of the first commutation assembly 2, and flows through the second heat exchanger 4, throttling successively Device 5, First Heat Exchanger 3, and be back in compressor 1 eventually through the import 11 of compressor 1 and compressed again.

Thus, air-conditioning system 100 according to embodiments of the present invention, by setting can break-make inlet pathway 6, and arrange with First outlet stream 71 and second outlet stream 72 that inlet pathway 6 is switchably connected are it is ensured that air-conditioning system 100 is being disliked Remain to normally run under bad environment.

Here, it should be noted that " 60 DEG C ", " -20 DEG C " of mentioning in this application etc. are merely illustrative, and not It is understood that as limitation of the present invention.That is, the break-make situation of inlet pathway 6 and its turn on first outlet stream 71 Or specifically can be arranged according to real work situation with second outlet stream 72 conducting.For example, when outdoor environment temperature does not arrive Reach 60 DEG C, for example, 40 DEG C, 50 DEG C when it is also possible to make inlet pathway 6 turn on, and make inlet pathway 6 and first outlet stream 71 Or second outlet stream 72 turns on, to mitigate the load of compressor 1 cylinder body, reduce the quantity of heat production of compressor 1, thus ensureing to compress The normal operation of machine 1, and extend the service life of compressor 1.And work as outdoor environment temperature and be higher than -20 DEG C, for example, -2 DEG C, -10 DEG C when it is also possible to make inlet pathway 6 turn on, and make inlet pathway 6 and second outlet stream 72 or first outlet stream 71 conducting, with mitigate the frosting situation of First Heat Exchanger 3 it is ensured that its can normally heat exchange, make the heating effect of air-conditioning system 100 Good.

Describe the air-conditioning system 100 according to the multiple embodiment of the present invention below with reference to Fig. 1-Fig. 3 in detail.

Embodiment one

As shown in figure 1, in the present embodiment, air-conditioning system 100 such as detachable air conditioner includes：Compressor 1, first change Go out to assembly 2, First Heat Exchanger 3, the second heat exchanger 4, throttling arrangement 5, inlet pathway 6, first outlet stream 71 and second Mouth stream 72.

Specifically, the side wall of compressor 1 has import 11 and top has outlet 12, at import 11, be connected with liquid storage Device 13, to carry out gas-liquid separation to the cold-producing medium entering into before compressor 1, prevents liquid refrigerant from producing liquid to compressor 1 Hit.First commutation assembly 2 has first interface 21 to the 4th interface 24, and first interface 21 is connected with the outlet 12 of compressor 1, the Two interfaces 22 are connected with the first end of First Heat Exchanger 3, and the 3rd interface 23 is connected with the import 11 of reservoir 13, the 4th interface 24 It is connected with the first end of the second heat exchanger 4, throttling arrangement 5 is connected to the second end of First Heat Exchanger 3 and the of the second heat exchanger 4 Between two ends.

Wherein, it is provided with the second commutation assembly 8 between the first interface 21 of the outlet 12 of compressor 1 and the first commutation assembly 2, Second commutation assembly 8 includes the 5th interface 81, the 6th interface 82, the 7th interface 83 and the 8th interface 84, the 5th interface 81 and pressure The outlet 12 of contracting machine 1 is connected, and the 6th interface 82 is connected with the above-mentioned first end of inlet pathway 6, and the 7th interface 83 and first commutates The first interface 21 of assembly 2 is connected, at least one of the 6th interface 82, the 7th interface 83 and the 8th interface 84 and the 5th interface 81 conductings.Thus, by arranging the second commutation assembly 8, it is possible to achieve leading between the outlet 12 of inlet pathway 6 and compressor 1 Lead to and separate.

Alternatively, the second commutation assembly 8 is four-way change-over valve, but not limited to this.

Above-mentioned second end of inlet pathway 6 be provided with the 3rd commutation assembly 9, the 3rd commutation assembly 9 include the first import 91, can The first outlet 92 of switching ground and the first import 91 conducting and second outlet 93, above-mentioned the of the first import 91 and inlet pathway 6 Two ends are connected, and the first outlet 92 of the 3rd commutation assembly 9 is connected with the above-mentioned first end of first outlet stream 71, the 3rd commutation group The second outlet 93 of part 9 is connected with the above-mentioned first end of second outlet stream 72.Thus, by arranging the 3rd commutation assembly 9, can To realize the switching between first outlet stream 71 and second outlet stream 72 and inlet pathway 6.Alternatively, the 3rd commutation assembly 9 is triple valve, and structure is simple, and is easily achieved.But not limited to this.

When outdoor environment temperature high for example be higher than 60 DEG C when, air-conditioning system 100 such as detachable air conditioner refrigerating operaton, The first interface 21 of the first commutation assembly 2 turns on second interface 22 and the 3rd interface 23 is turned on the 4th interface 24, may be used simultaneously So that the 5th interface 81 of the second commutation assembly 8 is both turned on the 6th interface 82 and the 7th interface 83, and make the 3rd commutation assembly 9 The first import 91 and first outlet 92 turn on, thus, the cold-producing medium of the HTHP discharged from the outlet 12 of compressor 1 can divide Become two-way flowing, a road cold-producing medium passes through the first commutation assembly 2 by the 5th interface 81 of the second commutation assembly 8 and the 7th interface 83 First interface 21 and second interface 22 through First Heat Exchanger 3 condense cooling, in addition a road cold-producing medium is without First Heat Exchanger 3 Heat exchange, but the 5th interface 81 by the second commutation assembly 8 and the 6th interface 82 pass through inlet pathway 6 from the 3rd commutation assembly 9 The first import 91 and first outlet 92 through first outlet stream 71 and an above-mentioned road cold-producing medium First Heat Exchanger 3 outlet 12 Enter throttling arrangement 5 reducing pressure by regulating flow after place's mixing, evaporate subsequently into the second heat exchanger 4, so that room temperature is reduced, after heat exchange Cold-producing medium is flowed back in compressor 1 by the import 11 of compressor 1 by the 3rd interface 23 of the first commutation assembly 2 and the 4th interface 24 And be compressed again, the cold-producing medium after compression is discharged from the outlet 12 of compressor 1, so moves in circles, and is followed with realizing refrigeration Ring.In the process, due to the second commutation the 5th interface 81 of assembly 8 and the connection of the 6th interface 82, improve through throttling dress Put the refrigerant temperature after 5 throttlings so that the inlet and outlet of the second heat exchanger 4 can raise the heat exchange so that indoor set Intensity diminishes, and heat exchange amount reduces, thus improve the inlet temperature of compressor 1, alleviates the load of compressor 1 cylinder body, reduces The quantity of heat production of compressor 1, and then ensure that air-conditioning system 100 can also even running in hot environment.

When extremely low such as less than -20 DEG C of outdoor environment temperature, air-conditioning system 100 such as detachable air conditioner heats fortune OK, the first interface 21 of the first commutation assembly 2 is turned on the 4th interface 24 and second interface 22 is turned on the 3rd interface 23, simultaneously The 5th interface 81 that the second commutation assembly 8 can be made is both turned on the 6th interface 82 and the 7th interface 83, and makes the 3rd commutation group First import 91 of part 9 and second outlet 93 turn on, thus, the gas system of the HTHP discharged from the outlet 12 of compressor 1 Cryogen is divided into two-way：Lead up to the 5th interface 81 of the second commutation assembly 8 and the 7th interface 83 through the first commutation assembly 2 the One interface 21 and the 4th interface 24 flow to the second heat exchanger 4, so that room is heated up, another road without the second heat exchanger 4 directly by 5th interface 81 of the second commutation assembly 8 and the 6th interface 82 pass through the first import 91 from the 3rd commutation assembly 9 for the inlet pathway 6 Flow to second outlet stream 72 with second outlet 93 to enter after the exit of the second heat exchanger 4 mixes with an above-mentioned road cold-producing medium Throttling arrangement 5 reducing pressure by regulating flow, the second interface 22 and the 3rd after First Heat Exchanger 3 heat exchange, through the first commutation assembly 2 Interface 23 flows to compressor 1, sends from the outlet 12 of compressor 1 again, so move in circles in compressor 1 after being compressed, with Realization heats circulation.In the process, due to the cold-producing medium discharged from the outlet 12 of compressor 1, some does not enter into second Heat exchanger 4 and be directly entered throttling arrangement 5, therefore improve the inlet temperature of First Heat Exchanger 3, be conducive under worst cold case The frost layer on First Heat Exchanger 3 surface in the off-premises station of detachable air conditioner is melted, thus ensure that the heat exchange of First Heat Exchanger 3 Effect, improves the heating capacity of indoor set and the efficiency of air-conditioning system 100.

And work as outdoor environment temperature be less than 60 DEG C, such as 37 DEG C, 42 DEG C when, air-conditioning system 100 can carry out routine system 5th interface 81 of the second commutation assembly 8 and the 7th interface 83 now can only be turned on, now from compressor 1 by SAPMAC method The cold-producing medium of outlet 12 discharge all flows to the first interface 21 of the first commutation assembly 2, and flows through First Heat Exchanger 3, section successively Stream device 5, the second heat exchanger 4, and be back in compressor 1 eventually through the import 11 of compressor 1 and compressed again.Work as room External environment temperature is higher than -20 DEG C, such as, when 4 DEG C, air-conditioning system 100 can carry out the circulation that heats of routine, now equally permissible Only the 5th interface 81 of the second commutation assembly 8 and the 7th interface 83 are turned on, the cold-producing medium discharged from the outlet 12 of compressor 1 will All flow to the first interface 21 of the first commutation assembly 2, and flow through the second heat exchanger 4, throttling arrangement 5, First Heat Exchanger successively 3, and be back in compressor 1 eventually through the import 11 of compressor 1 and compressed again.

Thus, by using the air-conditioning system 100 according to the present invention, both having can guarantee that under normal temperature environment, air-conditioning system System 100 can normally run, and can guarantee that in the presence of a harsh environment, by changing the second commutation assembly 8 and the 3rd commutation assembly 9 again Conducting situation, to ensure the stable operation of compressor 1, and then guarantees that air-conditioning system 100 can be in very hot such as more than 60 DEG C rings Persistently freeze in border, persistently heat in extremely cold such as less than -20 DEG C of environment, improves the stability of air-conditioning system 100, greatly Increased the range of air-conditioning system 100.

Embodiment two

As shown in Fig. 2 the present embodiment is roughly the same with the structure of embodiment one, wherein identical part adopts identical attached Icon is remembered, the difference is that only：Inlet pathway 6 is provided with the first electric expansion valve 61.

Inlet pathway 6 controls the break-make of inlet pathway 6 by the first electric expansion valve 61.Specifically, when the first electronics When expansion valve 61 completely closes, it is possible to achieve the cut-off of inlet pathway 6, now can carry out the cooling and warming circulation of routine.When When first electric expansion valve 61 is opened, it is possible to achieve the conducting of inlet pathway 6, now may insure air-conditioning system 100 severe Also can persistently heat under operating mode or freeze.Wherein it is possible to adjust the aperture of the first electric expansion valve 61 according to actual conditions.

Compressor 1, first commutation assembly 2 in the air-conditioning system 100 of the present embodiment and embodiment one, First Heat Exchanger 3, The structure of the second heat exchanger 4, throttling arrangement 5 and the 3rd commutation assembly 9 is similar to, therefore here is not described in detail.

For example, when outdoor environment temperature high for example be higher than 60 DEG C when, air-conditioning system 100 for example detachable air conditioner refrigeration Run, the first interface 21 of the first commutation assembly 2 turns on second interface 22 and the 3rd interface 23 is turned on the 4th interface 24, with When can open the first electric expansion valve 61, and so that the first import 91 of the 3rd commutation assembly 9 and second outlet 93 is turned on.From pressure The cold-producing medium of contracting machine 1 HTHP out can divide two-way to flow：One tunnel condenses cooling through First Heat Exchanger 3, is then passed through Throttling arrangement 5 reducing pressure by regulating flow, finally enters the second heat exchanger 4 evaporation and heat-exchange, so that room temperature is reduced；An other road then direct warp After crossing the first electric expansion valve 61 throttling, it is changed into the cold-producing medium of high-temperature low-pressure, thus improving the import temperature of the second heat exchanger 4 Degree, and then improve the inlet temperature of compressor 1, alleviate the load of compressor 1 cylinder body, reduce the caloric value of compressor 1, Guarantee air-conditioning system 100 even running.Certainly, the first import 91 and first that now can also control the 3rd commutation assembly 9 goes out Mouth 92 conducting, after cold-producing medium stream is throttled through the first electric expansion valve 61, can be by the 3rd commutation assembly 9 in the first heat exchange The exit of device 3 is mixed with the cold-producing medium on an above-mentioned road, and jointly flows to throttling arrangement 5 and throttled.

When extremely low such as less than -20 DEG C of outdoor environment temperature, air-conditioning system 100 such as detachable air conditioner heats fortune OK, the first interface 21 of the first commutation assembly 2 is turned on the 4th interface 24 and second interface 22 is turned on the 3rd interface 23, simultaneously The first electric expansion valve 61 can be opened, and so that the first import 91 of the 3rd commutation assembly 9 and first outlet 92 is turned on.From compression The gaseous refrigerant of machine 1 HTHP out, a road flows through the second heat exchanger 4 heat exchange, and another road high pressure gaseous freeze Agent then, after the first electric expansion valve 61 and the 3rd commutation assembly 9, is changed into high-temperature low-pressure cold-producing medium, is exported with throttling arrangement 5 Gas-liquid two-phase cold-producing medium mixing, then jointly flow through First Heat Exchanger 3.Because the now inlet temperature phase of First Heat Exchanger 3 Can significantly raise than temperature when the first electric expansion valve 61 completely closes, be thus advantageous in off-premises station under low temperature environment First Heat Exchanger 3 surface frost layer melt, thus ensure that the heat transfer effect of First Heat Exchanger 3, improve the system of indoor set Heat and the efficiency of air-conditioning system 100.Certainly, the first import 91 that now can also control the 3rd commutation assembly 9 goes out with second Mouth 93 conducting, thus flowing through the cold-producing medium of the first electric expansion valve 61 after throttling, can be saved by the 3rd commutation assembly 9 flow direction Stream device 5 is throttled again.

And work as outdoor environment temperature be less than 60 DEG C, such as 37 DEG C, 42 DEG C when, air-conditioning system 100 can carry out routine system First electric expansion valve 61 now can be completely closed by SAPMAC method, now complete from the cold-producing medium of outlet 12 discharge of compressor 1 Portion flows to the first interface 21 of the first commutation assembly 2, and flows through First Heat Exchanger 3, throttling arrangement 5, the second heat exchanger 4 successively, And be back in compressor 1 eventually through the import 11 of compressor 1 and compressed again.When outdoor environment temperature is higher than -20 DEG C, For example when 4 DEG C, what air-conditioning system 100 can carry out routine heats circulation, now equally can will be complete for the first electric expansion valve 61 Contract fully, the cold-producing medium discharged from the outlet 12 of compressor 1 is all flowed to the first interface 21 of the first commutation assembly 2, and according to Secondary flow through the second heat exchanger 4, throttling arrangement 5, First Heat Exchanger 3, and be back to compressor eventually through the import 11 of compressor 1 Compressed in 1 and again.

Thus, by using the air-conditioning system 100 according to the present invention, both having can guarantee that under normal temperature environment, air-conditioning system System 100 can normally run, and can guarantee that in the presence of a harsh environment again, changed by the aperture and the 3rd changing the first electric expansion valve 61 To the conducting situation of assembly 9, to ensure the stable operation of compressor 1, and then to guarantee that air-conditioning system 100 can be very hot such as 60 DEG C environment above is persistently freezed, persistently heat in extremely cold such as less than -20 DEG C of environment, improves stablizing of air-conditioning system 100 Property, substantially increase the range of air-conditioning system 100.

Embodiment three

As shown in figure 3, the present embodiment is roughly the same with the structure of embodiment two, wherein identical part adopts identical attached Icon is remembered, the difference is that only：Inlet pathway 6 is provided with stop valve 62.

Inlet pathway 6 controls the break-make of inlet pathway 6 by stop valve 62.Specifically, when stop valve 62 is closed, can To realize the cut-off of inlet pathway 6.When stop valve 62 is opened, it is possible to achieve the conducting of inlet pathway 6.

For example, when outdoor environment temperature high for example be higher than 60 DEG C when, air-conditioning system 100 for example detachable air conditioner refrigeration Run, the first interface 21 of the first commutation assembly 2 turns on second interface 22 and the 3rd interface 23 is turned on the 4th interface 24, with When can open stop valve 62, and so that the first import 91 of the 3rd commutation assembly 9 and first outlet 92 is turned on.Go out from compressor 1 The cold-producing medium of the HTHP coming can divide two-way to flow：One tunnel condenses cooling through First Heat Exchanger 3, is then passed through throttling arrangement 5 reducing pressure by regulating flows, finally enter the second heat exchanger 4 evaporation and heat-exchange, so that room temperature is reduced；An other road is then directly over stop valve After 62, throttle through throttling arrangement 5, be changed into the cold-producing medium of high-temperature low-pressure, thus improving the import temperature of the second heat exchanger 4 Degree, and then improve the inlet temperature of compressor 1, alleviate the load of compressor 1 cylinder body, reduce the caloric value of compressor 1, Guarantee air-conditioning system 100 even running.

When extremely low such as less than -20 DEG C of outdoor environment temperature, air-conditioning system 100 such as detachable air conditioner heats fortune OK, the first interface 21 of the first commutation assembly 2 is turned on the 4th interface 24 and second interface 22 is turned on the 3rd interface 23, simultaneously Stop valve 62 can be opened, and so that the first import 91 of the 3rd commutation assembly 9 and second outlet 93 is turned on.From compressor 1 out HTHP gaseous refrigerant, a road flows through the second heat exchanger 4 heat exchange, and another road high temperature and high pressure gaseous refrigerant then passes through After stop valve 62 and the 3rd commutation assembly 9, mix with the liquid refrigerant in the second heat exchanger 4 exit, flow through throttling arrangement 5, Gas-liquid two-phase cold-producing medium afterwards flows through First Heat Exchanger 3.Because now the inlet temperature of First Heat Exchanger 3 is compared to stop valve 62 temperature when completely closing can significantly raise, and is thus advantageous to First Heat Exchanger 3 surface in off-premises station under low temperature environment Frost layer melt, thus ensure that the heat transfer effect of First Heat Exchanger 3, improve heating capacity and the air-conditioning system 100 of indoor set Efficiency.

And work as outdoor environment temperature be less than 60 DEG C, such as 37 DEG C, 42 DEG C when, air-conditioning system 100 can carry out routine system Stop valve 62 now can be closed by SAPMAC method, and the cold-producing medium now discharged from the outlet 12 of compressor 1 all flows to first and changes To the first interface 21 of assembly 2, and flow through First Heat Exchanger 3, throttling arrangement 5, the second heat exchanger 4 successively, and eventually through pressure The import 11 of contracting machine 1 is back in compressor 1 and is compressed again.When outdoor environment temperature is higher than -20 DEG C, such as when 4 DEG C, empty Adjusting system 100 can carry out routine heat circulation, now equally stop valve 62 can be closed, from the outlet 12 of compressor 1 The cold-producing medium discharged all is flowed to the first interface 21 of the first commutation assembly 2, and flows through the second heat exchanger 4, throttling dress successively Put 5, First Heat Exchanger 3, and be back in compressor 1 eventually through the import 11 of compressor 1 and compressed again.

Thus, by using the air-conditioning system 100 according to the present invention, both having can guarantee that under normal temperature environment, air-conditioning system System 100 can normally run, and can guarantee that in the presence of a harsh environment, by changing opening and closing and the 3rd commutation assembly 9 of stop valve 62 again Conducting situation, to ensure the stable operation of compressor 1, and then to guarantee that air-conditioning system 100 can be at very hot such as more than 60 DEG C Environment persistently freezes, persistently heat in extremely cold such as less than -20 DEG C of environment, improves the stability of air-conditioning system 100, greatly Increased the range of air-conditioning system 100.

The control method of the air-conditioning system 100 of embodiment according to a second aspect of the present invention, wherein, air-conditioning system 100 is root Air-conditioning system 100 according to the present invention above-mentioned first aspect embodiment.The concrete structure of air-conditioning system 100 and operation principle etc. are at this It is described in detail in application above description, will not be described here.

Wherein, the control method of air-conditioning system 100 comprises the following steps：

When air-conditioning system 100 refrigerating operaton,

Detection outdoor environment temperature T₁；

As outdoor environment temperature T₁During less than the first temperature predetermined threshold, control the first interface 21 of the first commutation assembly 2 Turn on second interface 22 and the 3rd interface 23 is turned on the 4th interface 24, and control inlet pathway 6 to disconnect (now air-conditioning system 100 kind of refrigeration cycle carrying out routine)；

As outdoor environment temperature T₁During more than or equal to the first temperature predetermined threshold, the first of the first commutation assembly 2 is controlled to connect Mouth 21 turns on second interface 22 and the 3rd interface 23 is turned on the 4th interface 24, controls inlet pathway 6 to turn on and make inlet flow One of conducting in road 6 and first outlet stream 71 and second outlet stream 72 is (now, for example when inlet pathway 6 and the During one outlet flow passage 71 conducting, two-way flowing can be divided into from the cold-producing medium of compressor 1 HTHP out, a road is through first Heat exchanger 3 condensation cooling, is then passed through throttling arrangement 5 expenditure and pressure, finally enters the second heat exchanger 4 evaporation and heat-exchange, make room Temperature reduces；An other road is then without First Heat Exchanger 3, but is directly over inlet pathway 6 and flows to first outlet stream 71, It is changed into the cold-producing medium of cryogenic high pressure through throttling arrangement 5 throttling afterwards, thus, improve throttling arrangement 5 exit after throttling Temperature, and then the inlet temperature of the second heat exchanger 4 and outlet temperature all can raise, and so that the second heat exchanger 4 heat transfer intensity is diminished, change Heat reduces, and drives the inlet temperature of compressor 1 to raise, alleviates the load of compressor 1 cylinder body, reduce the product of compressor 1 Heat is it is ensured that air-conditioning system 100 even running in hot environment).

When air-conditioning system 100 heating operation,

Detection outdoor environment temperature T₂；

As outdoor environment temperature T₂During more than second temperature predetermined threshold, control the first interface 21 of the first commutation assembly 2 Turn on the 4th interface 24 and second interface 22 is turned on the 3rd interface 23, and control inlet pathway 6 to disconnect (now air-conditioning system 100 carry out routine heat circulation)；

As outdoor environment temperature T₂During less than or equal to second temperature predetermined threshold, the first of the first commutation assembly 2 is controlled to connect Mouth 21 turns on the 4th interface 24 and second interface 22 is turned on the 3rd interface 23, controls inlet pathway 6 to turn on and make inlet flow Another conducting in road 6 and first outlet stream 71 and second outlet stream 72 tunnel is (now, for example when inlet pathway 6 and the During two outlet flow passage 72 conducting, from compressor 1 high-temperature high-pressure gas refrigerant out, a road flows through the second heat exchanger 4 heat exchange, Another road high-temperature high-pressure gas refrigerant after inlet pathway 6 with second outlet stream 72 with an above-mentioned road and the second heat exchanger Flow to throttling arrangement 5 after cold-producing medium mixing after 4 heat exchange, then flow through First Heat Exchanger 3.With respect to the disconnection of inlet pathway 6, Cold-producing medium now has been directly entered throttling arrangement 5 because some does not enter into the second heat exchanger 4, therefore improves The inlet temperature of one heat exchanger 3, is conducive to the frost layer on First Heat Exchanger 3 surface of off-premises station under worst cold case to melt, thus protecting Demonstrate,prove the heat transfer effect of First Heat Exchanger 3, improved the heating capacity of indoor set and the efficiency of system).

Here, it should be noted that either outdoor environment temperature T₁More than or equal to the first temperature predetermined threshold or room External environment temperature T₂Less than or equal to second temperature predetermined threshold, inlet pathway 6 and first outlet stream 71 conducting or with second Outlet flow passage 72 turns on, and can be determined according to actual conditions.For example, as shown in figures 1 and 3, when inlet pathway 6 passes through second When commutation assembly 8 or stop valve 62 are to control break-make, as outdoor environment temperature T₁During more than or equal to the first temperature predetermined threshold Inlet pathway 6 is controlled to turn on first outlet stream 71, and outdoor environment temperature T₂During less than or equal to second temperature predetermined threshold Inlet pathway 6 is controlled to turn on second outlet stream 72.When inlet pathway 6 controls break-make by the first electric expansion valve 61 When, as shown in Fig. 2 because the first electric expansion valve 61 itself also has the effect of reducing pressure by regulating flow, therefore follow in refrigeration or heat During ring, cold-producing medium can be made to be not passed through throttling arrangement 5, and flow only through the first electric expansion valve 61, specifically, when outdoor environment temperature Degree T₁Turn on second outlet stream 72 more than or equal to control inlet pathway 6 during the first temperature predetermined threshold, and outdoor environment temperature Degree T₂Turn on first outlet stream 71 less than or equal to controlling inlet pathway 6 during second temperature predetermined threshold.

The control method of air-conditioning system 100 according to embodiments of the present invention, is ensureing the same of normal refrigeration or heating operation When, it is also ensured that the stable operation of compressor 1 under exceedingly odious operating mode, and then ensure that air-conditioning system 100 can be Persistently refrigeration the environment in extremely low such as less than -20 DEG C of outdoor temperature under the environment that high such as more than 60 DEG C of outdoor temperature Under persistently heat, improve the stability of air-conditioning system 100, substantially increase the range of air-conditioning system 100.

According to some embodiments of the present invention, as outdoor environment temperature T₁During more than the 3rd temperature predetermined threshold, control pressure The outlet 12 of contracting machine 1 is disconnected with the first interface 21 of the first commutation assembly 2, control inlet pathway 6 to turn on and make inlet pathway 6 with First outlet stream 71 turns on, and the wherein the 3rd temperature predetermined threshold is more than the first temperature predetermined threshold；As outdoor environment temperature T₁ More than or equal to the first temperature predetermined threshold, less than or equal to the 3rd temperature predetermined threshold when, control first connecing of the first commutation assembly 2 Mouth 21 turns on second interface 22 and the 3rd interface 23 is turned on the 4th interface 24, controls inlet pathway 6 to turn on and make inlet flow Road 6 is turned on first outlet stream 71.

Alternatively, the span of the first temperature predetermined threshold is 48 DEG C～52 DEG C (inclusion endpoint value), and the 3rd temperature is pre- The span determining threshold value is 58 DEG C～62 DEG C (inclusion endpoint value).First temperature predetermined threshold and the 3rd temperature predetermined threshold Concrete numerical value specifically can be arranged according to actual conditions, preferably to meet actual requirement.For example, the first temperature predetermined threshold is 50 DEG C, the 3rd temperature predetermined threshold is 60 DEG C.

According to some embodiments of the present invention, as outdoor environment temperature T₂During less than the 4th temperature predetermined threshold, control the The first interface 21 of one commutation assembly 2 turns on the 4th interface 24 and second interface 22 is turned on the 3rd interface 23, controls import Stream 6 turned on once every first scheduled time, each conduction first predetermined hold-time, controlled inlet pathway 6 and the Two outlet flow passage 72 turn on；As outdoor environment temperature T₂More than or equal to the 4th temperature predetermined threshold, less than or equal to second temperature pre- When determining threshold value, the first interface 21 of the first commutation assembly 2 and the 4th interface 24 is controlled to turn on and second interface 22 and the 3rd interface 23 conductings, control inlet pathway 6 to turn on once every second scheduled time, each conduction second predetermined hold-time, control Inlet pathway 6 processed and second outlet stream 72 turn on, the wherein the 4th temperature predetermined threshold be less than second temperature predetermined threshold, first The scheduled time was less than for second scheduled time, and the first predetermined hold-time is more than or equal to the second predetermined hold-time.Thus, by rank Section property ground control inlet pathway 6 conducting be beneficial to off-premises station under worst cold case First Heat Exchanger 3 surface frost layer melt it is ensured that The heat transfer effect of First Heat Exchanger 3, and when inlet pathway 6 separates, the efficiency of compressor 1 can be improved, so that permissible The efficiency of lifting air-conditioning system 100.And, by the outdoor environment temperature T under worst cold case₂Carry out Further Division, and Different control modes are taken to air-conditioning system 100, specifically, as outdoor environment temperature T₂When extremely low such as less than -20 DEG C, contracting Short first scheduled time, extending the first predetermined hold-time, First Heat Exchanger 3 surface frosting being prevented effectively from, thus ensureing The heat transfer effect of First Heat Exchanger 3, improves the efficiency of air-conditioning system 100.

Alternatively, the span of described second temperature predetermined threshold is 0 DEG C～-4 DEG C (inclusion endpoint value), the described 4th The span of temperature predetermined threshold is -18 DEG C～-22 DEG C (inclusion endpoint value).Second temperature predetermined threshold and the 4th temperature are pre- The concrete numerical value determining threshold value specifically can be arranged according to actual conditions, preferably to meet actual requirement.For example, second temperature is pre- Determine threshold value and be 0 DEG C, the 4th temperature predetermined threshold is -20 DEG C.

Alternatively, the span of first scheduled time be 25 minutes～35 minutes (inclusion endpoint value), first continue pre- The span fixed time is 9 minutes～11 minutes (inclusion endpoint value)；The span of second scheduled time be 35 minutes～ 45 minutes (inclusion endpoint value), the span of the second predetermined hold-time is 7 minutes～9 minutes (inclusion endpoint value).For example, First scheduled time be 30 minutes, the first predetermined hold-time be 10 minutes, second scheduled time be 40 minutes, second continue pre- Fix time as 8 minutes.It is understood that first scheduled time, the first predetermined hold-time, second scheduled time and second The concrete numerical value of predetermined hold-time specifically can be arranged according to actual conditions, preferably to meet actual requirement.

Specifically describe the control method of the air-conditioning system 100 according to the multiple embodiment of the present invention below with reference to Fig. 1-Fig. 3.Its In, all parts of air-conditioning system 100 are all described in detail in the application above description, will not be described here.In addition, needing It is noted that said temperature value (the predetermined threshold of the first temperature predetermined threshold to the 4th temperature being related in the following embodiments Value) or the time (first scheduled time, the first predetermined hold-time, second scheduled time and the second predetermined hold-time) tool Body numerical value is not limited to the concrete numerical value being previously mentioned in embodiment, and it specifically can be arranged according to actual requirement, preferably to meet Actual requirement.

Embodiment one

In the present embodiment, with the first temperature predetermined threshold be 50 DEG C, the 3rd temperature predetermined threshold be 60 DEG C, second temperature Predetermined threshold is 0 DEG C, the 4th temperature predetermined threshold is -20 DEG C, first scheduled time was 30 minutes, the first predetermined hold-time is 10 minutes, second scheduled time be 40 minutes, the second predetermined hold-time be 8 minutes as a example illustrate.

As shown in figure 1, the refrigeration control method of air-conditioning system 100 is as follows：

Air-conditioning system 100, in refrigerating operaton, detects outdoor environment temperature T₁；

As outdoor environment temperature T₁During 50 DEG C of ＜, the 5th interface 81 of the second commutation assembly 8 is connected with the 7th interface 83, with Carry out the kind of refrigeration cycle of routine；

When outdoor environment temperature meets 50≤T₁When≤60 DEG C, the second commutation the 5th interface 81 of assembly 8 and the 6th interface 82nd, the 7th interface 83 all connects, and the high-temperature high-pressure refrigerant that now outlet 12 of compressor 1 is discharged can divide two-way to flow, a road Cooling is condensed through First Heat Exchanger 3 by the 5th interface 81 and the 7th interface 83 of the second commutation assembly 8, is then passed through throttling dress Put 5 expenditure and pressures, finally enter the second heat exchanger 4 and evaporate, so that room temperature is reduced；An other road is without First Heat Exchanger 3 Heat exchange, but inlet pathway 6 is flowed to by the second commutation the 5th interface 81 of assembly 8 and the 6th interface 82, and passes through the 3rd First import 91 of commutation assembly 9 and first outlet 92 flow directly into throttling arrangement 5.Break with the 5th interface 81 and the 6th interface 82 Situation when opening is compared, now the connecting of the 5th interface 81 and the 6th interface 82, and improves the outlet temperature of throttling arrangement 5, enters And the inlet and outlet of the second heat exchanger 4 all can raise, indoor set heat transfer intensity diminishes, and heat exchange amount reduces, and drives compression The inlet temperature of machine 1 raises, and alleviates the load of compressor 1 cylinder body, reduces the quantity of heat production of compressor 1 it is ensured that air-conditioning system 100 even runnings in hot environment.

As outdoor environment temperature T₂During more than 60 DEG C of ＞, the 5th interface 81 of the second commutation assembly 8 and the 7th interface 83 break Open, the 5th interface 81 is connected with the 6th interface 82, the 8th interface 84.Now outdoor environment temperature is too high, in order to ensure compressor 1 Safety and the assembly such as outdoor electromechanical control box safety, close the pipeline of the 5th interface 81 and the 7th interface 83, make from compressor 1 Cold-producing medium out is directly entered by first import 91 and first outlet 92 of the 3rd commutation assembly 9 without First Heat Exchanger 3 Enter throttling arrangement 5, the second heat exchanger 4 and indoor environment subsequently into indoor set carry out heat exchange, produce refrigeration.Now press Contracting machine 1 load not high it is ensured that the normal operation of air-conditioning system 100.

The heat-production control method of air-conditioning system 100 is as follows：

Air-conditioning system 100, in heating operation, detects outdoor environment temperature T₂；

As outdoor environment temperature T₂During 0 DEG C of ＞, the 5th interface 81 of the second commutation assembly 8 connects with the 7th interface 83, enters What row was conventional heats circulation；

When outdoor environment temperature meets -20≤T₂When≤0 DEG C, the second commutation the 5th interface 81 of assembly 8 and the 7th interface 83 connections, the 5th interface 81 is connected once every 40 minutes with the 6th interface 82 simultaneously, and connection once continues 8 minutes.From compression Machine 1 high-temperature high-pressure gas refrigerant out, a road flows through the second heat exchanger 4 and throttling arrangement 5, and another road periodically flows through First import 91 of the 3rd commutation assembly 9 and second outlet 93 and throttling arrangement 5.With respect to the second commutation assembly 8 the 5th Interface 81 and the disconnection of the 6th interface 82, cold-producing medium now directly enters because some does not enter into the second heat exchanger 4 Enter throttling arrangement 5, therefore improved the inlet temperature of First Heat Exchanger 3, be conducive to first of off-premises station under worst cold case to change The frost layer on hot device 3 surface is melted, thus ensure that the heat transfer effect of the First Heat Exchanger 3 of off-premises station, improves the system of indoor set Heat and the efficiency of air-conditioning system 100.

As outdoor environment temperature T₂When ＜ -20 DEG C, the 5th interface 81 of the second commutation assembly 8 is connected with the 7th interface 83, 5th interface 81 is connected once every 30 minutes with the 6th interface 82 simultaneously, and connection once continues 10 minutes.Its effect and purpose Similar with above-mentioned operating mode.First Heat Exchanger 3 defrosts in time, to ensure the heating effect of the second heat exchanger 4 of indoor set.

Embodiment two

In the present embodiment, so that the first temperature predetermined threshold is 55 DEG C, second temperature predetermined threshold is -20 DEG C as a example carry out Explanation.

As shown in Fig. 2 the refrigeration control method of air-conditioning system 100 is as follows：

As outdoor environment temperature T₁During 55 DEG C of ＜, the first electric expansion valve 61 is closed, and this circulates as conventional kind of refrigeration cycle；

As 55 DEG C≤T of outdoor environment temperature₁When, the first electric expansion valve 61 is opened, from compressor 1 HTHP out Cold-producing medium can divide two-way to flow, and a road condenses cooling through First Heat Exchanger 3, is then passed through throttling arrangement 5 expenditure and pressure, finally Get in the second heat exchanger 4 evaporation and heat-exchange of machine, so that room temperature is reduced；An other road is directly over the first electric expansion valve After 61, it is changed into the cold-producing medium of high-temperature low-pressure, and the first import 91 by the 3rd commutation assembly 9 and second outlet 93 flow to the The entrance of two heat exchangers 4, thus, improves the inlet temperature of the second heat exchanger 4, and then improves the import temperature of compressor 1 Degree, alleviates the load of compressor 1 cylinder body, reduces the quantity of heat production of compressor 1 it is ensured that air-conditioning system 100 even running.

As outdoor environment temperature T₂When ＞ -20 DEG C, the first electric expansion valve 61 is closed, and this circulates and follows for conventional heating Ring；

As -20 DEG C≤T of outdoor environment temperature₂When, the first electric expansion valve 61 is opened, high from compressor 1 high temperature out Calm the anger cryogen, a road flows through the second heat exchanger 4 heat exchange, and another road high-temperature high-pressure gas refrigerant is through the first electronic expansion After valve 61 and the 3rd commutation assembly 9, it is changed into high-temperature low-pressure cold-producing medium, mixes with the gas-liquid two-phase cold-producing medium of throttling arrangement 5 outlet, Then flow through First Heat Exchanger 3.Because compared with when now the inlet temperature of First Heat Exchanger 3 and the first electric expansion valve 61 are closed Temperature can significantly raise, and the frost layer being thus advantageous to First Heat Exchanger 3 surface of off-premises station under low temperature environment is melted, thus protecting Demonstrate,prove the heat transfer effect of the First Heat Exchanger 3 of off-premises station, improve the heating capacity of indoor set and the efficiency of air-conditioning system 100.

It is understood that in air-conditioning system 100 heating operation, the first electric expansion valve 61 can also be controlled interim Open or close.The time interval that first electric expansion valve 61 is opened and duration specifically can set according to actual requirement Put, so that the heat exchange function of air-conditioning system 100 is better achieved.

Embodiment two

As shown in figure 3, the refrigeration control method of air-conditioning system 100 is as follows：

As outdoor environment temperature T₁During 55 DEG C of ＜, close stop valve 62, this circulates as conventional kind of refrigeration cycle；

As 55 DEG C≤T of outdoor environment temperature₁When, open stop valve 62, from compressor 1 high-temperature high-pressure refrigerant meeting out Divide two-way flowing, a road condenses cooling through First Heat Exchanger 3, is then passed through throttling arrangement 5 expenditure and pressure, finally enters second Heat exchanger 4 evaporation and heat-exchange, makes room temperature reduce；After an other road is directly over stop valve 62, save through throttling arrangement 5 Stream, is changed into the cold-producing medium of high-temperature low-pressure, thus, improves the inlet temperature of the second heat exchanger 4, and then improve compressor 1 Inlet temperature, alleviates the load of compressor 1 cylinder body, reduces the caloric value of compressor 1 it is ensured that air-conditioning system 100 is steadily transported OK.

The refrigeration control method of air-conditioning system 100 is as follows：

As outdoor environment temperature T₂When ＞ -20 DEG C, close stop valve 62, this circulates and heats circulation for conventional；

As -20 DEG C≤T of outdoor environment temperature₂When, open stop valve 62, from compressor 1 high temperature and high pressure gas system out Cryogen, a road flows through the second heat exchanger 4 heat exchange, and another road high-temperature high-pressure gas refrigerant is through stop valve 62 and the 3rd commutation group After part 9, mix with the liquid refrigerant of the second heat exchanger 4 outlet, common stream is freezed through throttling arrangement 5, gas-liquid two-phase afterwards Agent flows through First Heat Exchanger 3.Because temperature can be significantly compared with when now the inlet temperature of First Heat Exchanger 3 and stop valve 62 are closed Degree raises, and the frost layer being thus advantageous to outdoor First Heat Exchanger 3 surface under low temperature environment is melted, thus ensure that the first heat exchange The heat transfer effect of device 3, improves the heating capacity of indoor set and the efficiency of air-conditioning system 100.

It is understood that in air-conditioning system 100 heating operation, stop valve 62 can also be controlled periodically to open or Close.The time interval that stop valve 62 is opened and duration specifically can be arranged according to actual requirement, to be better achieved The heat exchange function of air-conditioning system 100.

Other of air-conditioning system 100 according to embodiments of the present invention constitute and operate for those of ordinary skill in the art For be all known, be not detailed herein.

In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means specific features, the knot describing with reference to this embodiment or example Structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, to above-mentioned term Schematic representation is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or spy Point can combine in any one or more embodiments or example in an appropriate manner.

Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not Multiple changes, modification, replacement and modification can be carried out to these embodiments in the case of the principle of the disengaging present invention and objective, this The scope of invention is limited by claim and its equivalent.

Claims

1. a kind of air-conditioning system is it is characterised in that include：

Compressor, described compressor has inlet and outlet；

First commutation assembly, described first commutation assembly includes first interface to the 4th interface, and described first interface and the 3rd connects One of and second interface conducting in mouthful, another in described first interface and the 3rd interface is led with described 4th interface Logical, described first interface is connected with described outlet, and described 3rd interface is connected with described import；

First Heat Exchanger, the first end of described First Heat Exchanger is connected with described second interface；

Second heat exchanger, the first end of described second heat exchanger is connected with described 4th interface；

Throttling arrangement, described throttling arrangement be located at the second end of described First Heat Exchanger and described second heat exchanger the second end it Between；

Can break-make inlet pathway, the first end of described inlet pathway is located at the described outlet of described compressor and described first and connects Between mouthful；

The of first outlet stream and second outlet stream, the first end of described first outlet stream and described second outlet stream One end is switchably connected with the second end of described inlet pathway, and the second end of described first outlet stream is connected to described first Between described second end of heat exchanger and described throttling arrangement, the second end of described second outlet stream is connected to described second and changes Between described second end of hot device and described throttling arrangement.

2. air-conditioning system according to claim 1 is it is characterised in that the described outlet of described compressor and described first connects Be provided with the second commutation assembly between mouthful, described second commutation assembly includes the 5th and is interfaced to the 8th interface, described 5th interface with The described outlet of described compressor is connected, and the 6th interface is connected with the described first end of described inlet pathway, the 7th interface and institute State first interface to be connected, the described 6th is interfaced at least one of described 8th interface and described 5th interface conducting.

3. air-conditioning system according to claim 1 is it is characterised in that described inlet pathway is provided with the first electronic expansion Valve.

4. air-conditioning system according to claim 1 is it is characterised in that described inlet pathway is provided with stop valve.

5. the air-conditioning system according to any one of claim 1-4 it is characterised in that described inlet pathway described second End be provided with the 3rd commutation assembly, described 3rd commutation assembly include the first import, switchably with described first import conducting First outlet and second outlet, described first import is connected with described second end of described inlet pathway, described first outlet with The described first end of described first outlet stream is connected, the described first end phase of described second outlet and described second outlet stream Even.

6. air-conditioning system according to claim 5 is it is characterised in that described 3rd commutation assembly is triple valve.

7. air-conditioning system according to claim 1 is it is characterised in that described throttling arrangement is electric expansion valve, capillary Or capillary wick.

8. air-conditioning system according to claim 1 is it is characterised in that described first commutation assembly is cross valve.

9. a kind of control method of the air-conditioning system according to any one of claim 1-8 is it is characterised in that include following Step：

When described air-conditioning system refrigerating operaton,

Detection outdoor environment temperature T₁；

As described outdoor environment temperature T₁During more than or equal to described first temperature predetermined threshold, control described first interface with described Second interface conducting and described 3rd interface and described 4th interface conducting, control described inlet pathway conducting and make described import One of conducting in stream and described first outlet stream and described second outlet stream；

When described air-conditioning system heating operation,

Detection outdoor environment temperature T₂；

As described outdoor environment temperature T₂During more than second temperature predetermined threshold, control described first interface and described 4th interface Conducting and described second interface and described 3rd interface conducting, and control described inlet pathway to disconnect；

As described outdoor environment temperature T₂During less than or equal to described second temperature predetermined threshold, control described first interface with described 4th interface conducting and described second interface and described 3rd interface conducting, control described inlet pathway conducting and make described import Another conducting in stream and described first outlet stream and described second outlet stream.

10. the control method of air-conditioning system according to claim 9 is it is characterised in that work as described outdoor environment temperature T₁Greatly When the 3rd temperature predetermined threshold, control the described outlet of described compressor and described first interface to disconnect, control described import Stream turns on and makes described inlet pathway and described first outlet stream conducting, and wherein said 3rd temperature predetermined threshold is more than institute State the first temperature predetermined threshold；

As described outdoor environment temperature T₁Make a reservation for more than or equal to described first temperature predetermined threshold, less than or equal to described 3rd temperature During threshold value, control described first interface with described second interface conducting and described 3rd interface and described 4th interface conducting, control Make described inlet pathway conducting and make described inlet pathway and described first outlet stream conducting.

The control method of 11. air-conditioning systems according to claim 10 is it is characterised in that described first temperature predetermined threshold Span be 48 DEG C～52 DEG C, the span of described 3rd temperature predetermined threshold is 58 DEG C～62 DEG C.

The control method of 12. air-conditioning systems according to any one of claim 9-11 is it is characterised in that work as described outdoor Environment temperature T₂During less than the 4th temperature predetermined threshold, control described first interface and described 4th interface conducting and described second Interface and described 3rd interface conducting, control described inlet pathway to turn on once every first scheduled time, each conduction First predetermined hold-time, controls described inlet pathway and described second outlet stream conducting；

As described outdoor environment temperature T₂Make a reservation for more than or equal to described 4th temperature predetermined threshold, less than or equal to described second temperature During threshold value, control described first interface with described 4th interface conducting and described second interface and described 3rd interface conducting, control Make described inlet pathway to turn on once every second scheduled time, each conduction second predetermined hold-time, control described Inlet pathway and described second outlet stream conducting,

The control method of 13. air-conditioning systems according to claim 12 is it is characterised in that described second temperature predetermined threshold Span be 0 DEG C～-4 DEG C, the span of described 4th temperature predetermined threshold is -18 DEG C～-22 DEG C.

14. control methods of air-conditioning system according to claim 12 are it is characterised in that taking of described first scheduled time Value scope is 25 minutes -35 minutes, and the span of described first predetermined hold-time is 9 minutes -11 minutes；

The span of described second scheduled time is 35 minutes -45 minutes, the span of described second predetermined hold-time For 7 minutes -9 minutes.