CN209415615U - Multi-line system - Google Patents
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- CN209415615U CN209415615U CN201821910770.XU CN201821910770U CN209415615U CN 209415615 U CN209415615 U CN 209415615U CN 201821910770 U CN201821910770 U CN 201821910770U CN 209415615 U CN209415615 U CN 209415615U
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Abstract
This application involves air-conditioning technical fields, in particular to a kind of multi-line system.The multi-line system includes outdoor unit and multiple indoor units, the indoor unit includes indoor heat exchanger and the first electric expansion valve, indoors in machine liquid pipe, the indoor unit further includes auxiliary valve for the first electric expansion valve setting, and the auxiliary valve setting is indoors on machine tracheae.The multi-line system and its control method of the utility model are by increasing auxiliary valve on machine heat exchanger tracheae indoors, by closing the auxiliary valve or adjusting its aperture under heating operation mode, refrigerant is prevented to be deposited in inside indoor heat exchanger, while guaranteeing unit oil return, system refrigerant circulation is increased, the heating capacity and efficiency of indoor unit unit sub-load are improved.
Description
Technical field
This application involves air-conditioning technical fields, in particular to a kind of multi-line system.
Background technique
Multi-connected machine central air-conditioning is a type of family central air-conditioning, is commonly called as " one drag more ", refers to an outdoor unit
Two or more indoor units are connected by piping, outside is changed using air-cooled heat transfer form, indoor using directly evaporation
The primary coolant air-conditioning system of hot form.Multi-line system obtains increasingly in small and medium construction and part public building at present
It is widely applied, low with operating cost, cooling and warming temperature range is wide, and design freedom is high, beautiful (only use easy for installation
One outdoor unit) the advantages that.
Machine comes with electric expansion valve in the multi-connected machine of air-conditioning, and when normal heating operation, aperture is generally by machine in multi-connected machine
Degree of supercooling control, if temperature spot shutdown is not opened or reached to machine in multi-connected machine, in order to guarantee machine unit in the multi-connected machine
Normal oil return often only sets a fixed aperture.
In order to further in the requirement for guaranteeing to meet user's heating comfort while machine unit oil return in multi-connected machine, patent
Number the control method and device of mechanism thermal expansion valve aperture in a kind of multi-connected machine are disclosed for the patent of CN201610013176.X,
In multi-connection operation in heating mode, the aperture of heating expansion valve is adjusted according to the operating parameter of machine in multi-connected machine, is realized
Machine unit meets the effect that user heats comfort requirement in oil return simultaneously in air conditioning multi-couple machine.
In above two mode, due to only one electric expansion valve in indoor unit, to guarantee oil return effect, electronic expansion
Valve can not all be shut completely, and for indoor unit in the state of not being switched on, the aperture of electric expansion valve is smaller, the velocity ratio of refrigerant
Relatively slow, indoor unit and refrigerant have certain temperature difference in addition, and refrigerant can be condensed into liquid, and refrigeration oil is stored in the refrigerant of liquid
In, and since flow velocity is low, cause refrigeration oil to be easy savings in the indoor set heat exchanger not being switched on, reduces the refrigerant in system
Internal circulating load, sub-load heating capacity is low when causing to heat, and power consumption is big.
Utility model content
In order to solve the above-mentioned technical problem or it at least is partially solved above-mentioned technical problem, it is more that this application provides one kind
On-line system, to achieve the purpose that improve indoor unit unit sub-load heating capacity and efficiency in multi-line system.
According to the multi-line system of the embodiment of the present application, the multi-line system includes outdoor unit and multiple indoor units, institute
Stating indoor unit includes indoor heat exchanger and the first electric expansion valve, and first electric expansion valve is arranged in machine liquid pipe indoors,
The indoor unit further includes auxiliary valve, and the auxiliary valve setting is indoors on machine tracheae.
Further, the auxiliary valve is solenoid valve.
Further, the auxiliary valve is the second electric expansion valve.
Further, the outdoor unit includes compressor, outdoor heat exchanger, four-way valve, gas-liquid separator and third electronics
Expansion valve.
Further, the quantity of the compressor is provided with one, the compressor and each described indoor units at
Refrigeration cycle.
Further, air inlet temperature sensing package, the gas exhaust piping of the compressor are provided on the air inlet pipeline of the compressor
On be provided with exhaust temperature sensing package.
Further, high pressure sensor, the air inlet of the gas-liquid separator are provided on the gas exhaust piping of the compressor
Low pressure sensor is provided on pipe.
Further, it is provided with liquid pipe temperature sensing package in the indoor unit liquid pipe, tracheae temperature-sensitive is provided on indoor unit tracheae
Packet.
The multi-line system of the utility model is by increasing auxiliary valve, heating operation mode on machine heat exchanger tracheae indoors
Lower pass through closes the auxiliary valve or adjusts its aperture, and refrigerant is prevented to be deposited in inside indoor heat exchanger, is guaranteeing unit oil return
While, system refrigerant circulation is increased, the heating capacity and efficiency of indoor unit unit sub-load are improved.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present application, so that the application's is other
Feature, objects and advantages become more apparent upon.The illustrative examples attached drawing and its explanation of the application is for explaining the application, not
Constitute the improper restriction to the application.In the accompanying drawings:
Fig. 1 shows schematically the connection figure of multi-line system in the prior art；
Fig. 2 shows schematically the connection figure of multi-line system provided by the present application；
Fig. 3 shows schematically multi-line system provided by the present application in the connection figure of heating mode；And
Fig. 4 shows schematically multi-line system provided by the present application in the connection figure of refrigeration mode.
In figure:
1, indoor heat exchanger；2, the first electric expansion valve；3, indoor unit liquid pipe；4, auxiliary valve；5, indoor unit tracheae；6, it presses
Contracting machine；7, outdoor heat exchanger；8, four-way valve；9, gas-liquid separator；10, third electric expansion valve；11, environment temperature sensing package；12, it arranges
Gas temperature sensing package；13, air-breathing temperature sensing package；14, high pressure sensor；15, low pressure sensor；16, tracheae temperature sensing package；17, liquid pipe temperature-sensitive
Packet.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
In this application, term " on ", "lower", "inner", " in ", "outside", the orientation of the instructions such as "front", "rear" or position close
System is to be based on the orientation or positional relationship shown in the drawings.These terms are primarily to better describe the application and its implementation
Example, is not intended to limit indicated device, element or component must have particular orientation, or carries out structure with particular orientation
It makes and operates.
Also, above-mentioned part term is other than it can be used to indicate that orientation or positional relationship, it is also possible to for indicating it
His meaning, such as term " on " also are likely used for indicating certain relations of dependence or connection relationship in some cases.For ability
For the those of ordinary skill of domain, the concrete meaning of these terms in this application can be understood as the case may be.
In addition, term " setting ", " connection ", " fixation " shall be understood in a broad sense.For example, " connection " may be a fixed connection,
It is detachably connected or monolithic construction；It can be mechanical connection, or electrical connection；It can be directly connected, or pass through centre
Medium is indirectly connected, or is two connections internal between device, element or component.For ordinary skill
For personnel, the concrete meaning of above-mentioned term in this application can be understood as the case may be.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.1-4 and it is described in detail the application in conjunction with the embodiments below with reference to the accompanying drawings.
As shown in Figure 1, giving a kind of connection figure of multi-line system in the prior art, which includes room
Outer machine and multiple indoor units, wherein outdoor unit includes compressor 6, outdoor heat exchanger 7, four-way valve 8, gas-liquid separator 9 and third
Electric expansion valve 10, indoor unit include indoor heat exchanger 1 and the first electric expansion valve 2, and the first electric expansion valve 2 is arranged indoors
In machine liquid pipe 3, in addition, being provided with liquid pipe temperature sensing package 17 in machine liquid pipe 3 indoors, tracheae temperature-sensitive is provided on indoor unit tracheae 5
Packet 16 is provided with air inlet temperature sensing package 13 in addition in outdoor unit on the air inlet pipeline of compressor 6, on the gas exhaust piping of compressor 6
It is provided with exhaust temperature sensing package 12 and high pressure sensor 14, is provided with low pressure sensor 15 in the air inlet pipe of gas-liquid separator 9.It is above-mentioned
Each structure does not address the corresponding position in part and connection relationship as shown in Figure 1, the connection relationship of above structure, operation
And working principle be for those of ordinary skill in the art it is known, be not described in detail herein.
The indoor unit of multi-line system shown in FIG. 1 comes with the first electric expansion valve 2, when normal heating operation, aperture
It is generally controlled by the degree of supercooling of multi-line system indoor unit, if the indoor unit of multi-line system is not opened or reached temperature spot and stops
When machine, in order to guarantee the normal oil return of the multi-line system indoor unit unit, a fixed aperture is often set.Due to indoor unit
In only one second electric expansion valve 2, to guarantee oil return effect, the second electric expansion valve 2 can not shut completely, and indoor unit exists
In the state of not being switched on, the aperture of the second electric expansion valve 2 is smaller, and the flow velocity of refrigerant is slow, in addition indoor unit and system
Cryogen has certain temperature difference, and refrigerant can be condensed into liquid, and refrigeration oil is stored in the refrigerant of liquid, and since flow velocity is low, causes
Refrigeration oil is easy savings in the indoor set heat exchanger 1 not being switched on, and reduces the refrigerant circulation in system, portion when causing to heat
Divide load heating capacity low, power consumption is big.
Embodiment 1
Sub-load heating capacity is low when in order to solve to heat existing for multi-line system in the prior art shown in FIG. 1, consumption
The big technical problem of electricity present embodiments provides a kind of for improving the more of indoor unit unit sub-load heating capacity and efficiency
On-line system, internal structure connection figure are as shown in Figure 2.
As shown in Fig. 2, the multi-line system includes outdoor unit and multiple indoor units, indoor unit includes 1 He of indoor heat exchanger
First electric expansion valve 2, for the setting of the first electric expansion valve 2 indoors in machine liquid pipe 3, indoor unit further includes auxiliary valve 4, auxiliary valve
Setting is indoors on machine tracheae 5.It can also include compressor 6 according to the outdoor unit of the multi-line system of above-described embodiment, outdoor
Other necessary components such as heat exchanger 7, four-way valve 8, gas-liquid separator 9 and third electric expansion valve 10 or structure, and it is corresponding
Position and connection relationship can refer to multi-line system in the prior art, not address connection relationship, the operation of structure respectively
And working principle be for those of ordinary skill in the art it is known, be not described in detail herein.
Above-mentioned multi-line system realizes that the principle for improving indoor unit unit sub-load heating capacity and efficiency is as follows: when more
When on-line system operates in heating mode, the inside mode of communicating of four-way valve as shown in figure 3, the indoor unit being not keyed up auxiliary valve
4 close, and the auxiliary valve 4 of the indoor unit of booting is opened, and in the case where such setting, the compressor 6 of outdoor unit is by refrigerant compression
It for high temperature and high pressure steam, is entered in indoor unit by four-way valve 8, since the auxiliary valve 4 for the indoor unit being not keyed up is to close shape
State, refrigerant cannot be introduced into indoor set heat exchanger, thus will not bulk deposition indoors in machine heat exchanger 1, ensure that multi-joint
There is sufficient circulating mass of refrigerant in machine system, improve indoor unit unit sub-load heating capacity and efficiency to realize
Technical effect.And the lubricating oil carried secretly in refrigerant can be reduced to be stored in indoor heat exchanger 1, ensure that compressor 6
Recirculating oil quantity；When multi-line system operates in refrigeration mode or oil return mode, the inside mode of communicating of four-way valve as shown in figure 4,
It only needs to set auxiliary valve 4 and be in an open state, be namely equivalent to multi-line system at this time and be fitted without auxiliary valve 4；
Under above-mentioned various mode situations, the other elements structure including the first electric expansion valve 2 is according in the prior art
Control logic is run.
In some embodiments, auxiliary valve 4, which can choose, works as multi-connected machine with open and close two states for solenoid valve
When system operates in heating mode, the solenoid valve for the indoor unit being not keyed up is closed, and the solenoid valve of the indoor unit of booting is opened.
In some embodiments, auxiliary valve 4 can choose as the second electric expansion valve.At this point, the multi-line system is realized
The principle for improving indoor unit unit sub-load heating capacity and efficiency is as follows: when multi-line system operates in heating mode, four
The inside mode of communicating of port valve 8 is not keyed up as shown in figure 3, the second electronic expansion valve opening of the indoor unit of booting keeps maximum
The aperture of the second electric expansion valve of indoor unit determined according to the length and height fall of indoor unit and outdoor unit connecting tube, and
The aperture of first electric expansion valve 2 of the indoor unit being not keyed up keeps maximum.When not being switched on due to interior machine, interior machine connecting tube and room
A large amount of refrigerants and lubricating oil can be stored in interior heat exchanger, it, can be by maintaining certain aperture in the case where such setting
The second electric expansion valve will be stored in the refrigerant in indoor heat exchanger 1 and indoor unit connecting tube and lubricating oil reflux, and
And keeping the aperture 2 of the first electric expansion valve is maximum, so that refrigerant successively passes through the second electronic expansion valve, indoor heat exchanger
1 and first electric expansion valve 2 process will not bulk deposition indoors in machine heat exchanger 1, ensure that in multi-line system has
Sufficient circulating mass of refrigerant, to realize the technical effect for improving indoor unit unit sub-load heating capacity and efficiency.And
And the lubricating oil carried secretly in refrigerant can be reduced and be stored in indoor heat exchanger 1 and indoor unit connecting tube, it ensure that compression
The recirculating oil quantity of machine 6；When multi-line system operates in refrigeration mode or oil return mode, it is only necessary to set the second electric expansion valve
For maximum opening state, it is equivalent to multi-line system at this time and is fitted without the second electric expansion valve；In opening for heating mode
Other elements knot in the indoor unit of machine and under refrigeration mode, oil return mode situation, including the first electric expansion valve 2
Structure is run according to control logic in the prior art.
Embodiment 2
Present embodiments provide a kind of multi-line system control method, the multi-line system for providing embodiment 1 into
Row control, i.e., the multi-line system includes outdoor unit and multiple indoor units, and indoor unit includes that indoor heat exchanger 1 and the first electronics are swollen
Swollen valve 2, for the setting of the first electric expansion valve 2 indoors in machine liquid pipe 3, indoor unit further includes auxiliary valve 4, and auxiliary valve 4 is arranged in room
On interior machine tracheae 5.
Specific multi-line system control method includes: the indoor unit being not keyed up when multi-connection operation is in heating mode
Auxiliary valve close, the auxiliary valve of the indoor unit of booting is opened.
When multi-line system operates in heating mode, refrigerant compression is high temperature and pressure steaming by the compressor 6 of outdoor unit
Vapour is entered in indoor unit by four-way valve 8, and since the auxiliary valve 4 for the indoor unit being not keyed up is in off state, refrigerant can not
Enter in indoor set heat exchanger, thus will not bulk deposition indoors in machine heat exchanger 1, ensure that have in multi-line system and fill
The circulating mass of refrigerant of foot, to realize the technical effect for improving indoor unit unit sub-load heating capacity and efficiency.And
The lubricating oil carried secretly in refrigerant can be reduced to be stored in indoor heat exchanger 1, ensure that the recirculating oil quantity of compressor 6.
In the program, if auxiliary valve 4 is solenoid valve, the solenoid valve for the indoor unit being not keyed up is closed, the interior of booting
The solenoid valve of machine is opened；If auxiliary valve is selected as the second electric expansion valve, the second electronic expansion of the indoor unit being not keyed up
Valve is closed, and the second electronic expansion valve opening of the indoor unit of booting keeps maximum.
Specific multi-line system control method further include: when multi-connection operation is in refrigeration mode, each indoor unit
Auxiliary valve is opened.
Under refrigeration mode operating condition, in outdoor unit, refrigerant is condensed into high-temp liquid by gaseous state, lubricating oil also by
Gaseous state is condensed into liquid, since solubility is larger in high-temperature liquid state refrigerant for lubricating oil, from outdoor unit to indoor unit this
One section of pipeline will not trapped fuel.Liquid refrigerant gradually evaporates in machine indoors, and machine exports indoors, and refrigerant becomes have centainly mistake
The low temperature low pressure gas of temperature, because temperature is lower, most of lubricating oil is still liquid and refrigerant separation, therefore indoor
Also seldom there is trapped fuel in heat exchanger section.Therefore, under refrigeration mode, problem of oil return is not present in indoor unit part, so auxiliary valve
Adjusting refrigerant flow rate is not needed, state is maintained a normally open.
In the program, if auxiliary valve 4 is solenoid valve, the solenoid valve of each indoor unit is opened；If auxiliary valve selects
It is selected as the second electric expansion valve, then the equal aperture of the second electric expansion valve of each indoor unit keeps maximum.
Specific multi-line system control method further include: when multi-connection operation is in oil return mode, each indoor unit
Auxiliary valve is opened.
Unit oil return mode is equal to operation refrigeration mode, thus control method with it is identical in cooling mode, i.e., each
The auxiliary valve of indoor unit is opened.If auxiliary valve 4 is solenoid valve, the solenoid valve of each indoor unit is opened；If auxiliary
Valve is selected as the second electric expansion valve, then the equal aperture of the second electric expansion valve of each indoor unit keeps maximum.
Embodiment 3
A kind of multi-line system control method is present embodiments provided, for selecting the auxiliary valve provided in embodiment 1
Multi-line system for the second electric expansion valve is controlled, i.e., the multi-line system includes outdoor unit and multiple indoor units, room
Interior machine includes indoor heat exchanger 1 and the first electric expansion valve 2, and the first electric expansion valve 2 is arranged in machine liquid pipe 3 indoors, indoor
Machine further includes the second electric expansion valve, and the setting of the second electric expansion valve is indoors on machine tracheae 5.
Multi-line system control method includes: when multi-connection operation is in heating mode, and the second of the indoor unit of booting is electric
Sub- expansion valve opening keeps maximum；The aperture of second electric expansion valve of the indoor unit being not keyed up connects according to indoor unit and outdoor unit
The length and height fall of adapter tube determine, and the aperture of the first electric expansion valve keeps maximum.
When not being switched on due to interior machine, a large amount of refrigerants and lubricating oil can be stored in interior machine connecting tube and indoor heat exchanger, this
In embodiment, indoor heat exchanger 1 and indoor unit can will be stored in by maintaining the second electric expansion valve of certain aperture
Refrigerant in connecting tube and lubricating oil reflux, and keeping the aperture 2 of the first electric expansion valve is maximum so that refrigerant according to
The secondary process by the second electronic expansion valve, indoor heat exchanger 1 and the first electric expansion valve 2 will not bulk deposition machine changes indoors
In hot device 1, ensure that has sufficient circulating mass of refrigerant in multi-line system, improves indoor unit unit part to realize
The technical effect of load heating capacity and efficiency.And the lubricating oil carried secretly in refrigerant can be reduced and be stored in indoor heat exchanger 1
And in indoor unit connecting tube, the recirculating oil quantity of compressor 6 ensure that.
Wherein, with the increase of inside and outside machine mounting height and connecting tube, the refrigerant in indoor unit that is stored in not open and
Lubricating fluid can be more and more, and for the normal oil return for guaranteeing unit, the aperture of the second electric expansion valve will be gradually increased.Indoor unit with
In the case that the length and height fall one of them of outdoor unit connecting tube determine, the second electronic expansion of the indoor unit being not keyed up
The aperture of valve remains unchanged or increases with the increase of another.Data verification can be known through a large number of experiments, indoor unit with
The length and height fall of outdoor unit connecting tube, the aperture of the second electric expansion valve can have rule as shown in the table.
A1-E7 indicates the aperture of the second electric expansion valve, meets A1≤A2≤A3, B1≤B2≤B3, C1≤C2≤C3≤C4≤
C5≤C6≤C7, D1≤D2≤D3≤D4≤D5≤D6≤D7, E1≤E2≤E3≤E4≤E5≤E6≤E7。
A-G is the length of interval of connecting tube, and A-G is gradually increased.
A-e is the height fall of indoor unit and outdoor unit, and a-e is gradually increased.
Preferably, unit determines connection pipe for internal-external unit length and mounting height drop when installing for the first time, can be for the first time
These parameters are input in unit program by debugging board when booting debugging, are called for unit.Each letter symbol in above table
Specific value corresponding to number is directed to the unit of different brands model, the connecting tube of different size and different types of system of use
Cryogen and lubricating oil and it is different.
As shown in the table, a kind of optional referential data is given, using the machine of air conditioner model GMV-H160WL/B
Group, in the case where using R410A as refrigerant and FV50S as lubricating oil, the length of indoor unit and outdoor unit connecting tube
It is as shown in the table with the corresponding relationship of the aperture meeting of height fall, the second electric expansion valve.
Upper table is only that one kind is targetedly illustrated, and when air conditioner unit model or uses refrigerant and lubricating oil not
With in the case where, the length and height that indoor unit and outdoor unit connecting tube under corresponding condition can be obtained by experiment are fallen
The consistent relationship of difference, the aperture of the second electric expansion valve.
Specific multi-line system control method further include: when multi-connection operation is in refrigeration mode, each indoor unit
Second electric expansion valve keeps maximum opening.
Such as content in embodiment 2, under refrigeration mode, problem of oil return is not present in indoor unit part, so the second electronic expansion
Valve does not need adjusting refrigerant flow rate, keeps maximum opening.
Specific multi-line system control method further include: when multi-connection operation is in oil return mode, each indoor unit
Second electric expansion valve keeps maximum opening.Unit oil return mode is equal to operation refrigeration mode, thus control method with
It is identical under refrigeration mode.
Section Example is described in a progressive manner in this specification, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The above is only specific embodiment of the present utility model, make skilled artisans appreciate that or realizing that this is practical
It is novel.Various modifications to these embodiments will be apparent to one skilled in the art, defined herein
General Principle can realize in other embodiments without departing from the spirit or scope of the present utility model.Therefore,
Originally it is not intended to be limited to the embodiments shown herein, and is to fit to and applied principle and features of novelty phase herein
Consistent widest scope.
Claims (8)
1. a kind of multi-line system, the multi-line system includes outdoor unit and multiple indoor units, and the indoor unit includes interior
Heat exchanger (1) and the first electric expansion valve (2), first electric expansion valve (2) are arranged in machine liquid pipe (3) indoors, special
Sign is that the indoor unit further includes auxiliary valve (4), and auxiliary valve (4) setting is indoors on machine tracheae (5).
2. multi-line system according to claim 1, which is characterized in that the auxiliary valve (4) is solenoid valve.
3. multi-line system according to claim 1, which is characterized in that the auxiliary valve (4) is the second electric expansion valve.
4. multi-line system according to claim 1, which is characterized in that the outdoor unit includes that compressor (6), outdoor are changed
Hot device (7), four-way valve (8), gas-liquid separator (9) and third electric expansion valve (10).
5. multi-line system according to claim 4, which is characterized in that the quantity of the compressor (6) is provided with one,
The compressor (6) and each described indoor units are at refrigeration cycle.
6. multi-line system according to claim 4, which is characterized in that be arranged on the air inlet pipeline of the compressor (6)
Have air inlet temperature sensing package (13), exhaust temperature sensing package (12) is provided on the gas exhaust piping of the compressor (6).
7. multi-line system according to claim 4, which is characterized in that be arranged on the gas exhaust piping of the compressor (6)
Have high pressure sensor (14), is provided with low pressure sensor (15) in the air inlet pipe of the gas-liquid separator (9).
8. multi-line system according to claim 4, which is characterized in that be provided with liquid pipe on the indoor unit liquid pipe (3)
Temperature sensing package (17) is provided with tracheae temperature sensing package (16) on indoor unit tracheae (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821910770.XU CN209415615U (en) | 2018-11-19 | 2018-11-19 | Multi-line system |
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| CN201821910770.XU CN209415615U (en) | 2018-11-19 | 2018-11-19 | Multi-line system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539407A (en) * | 2018-11-19 | 2019-03-29 | 珠海格力电器股份有限公司 | Multi-line system and its control method |
| CN111623473A (en) * | 2020-06-08 | 2020-09-04 | 珠海格力电器股份有限公司 | Adaptive debugging method of air conditioner |
-
2018
- 2018-11-19 CN CN201821910770.XU patent/CN209415615U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539407A (en) * | 2018-11-19 | 2019-03-29 | 珠海格力电器股份有限公司 | Multi-line system and its control method |
| CN111623473A (en) * | 2020-06-08 | 2020-09-04 | 珠海格力电器股份有限公司 | Adaptive debugging method of air conditioner |
| CN111623473B (en) * | 2020-06-08 | 2021-09-14 | 珠海格力电器股份有限公司 | Adaptive debugging method of air conditioner |
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