CN104913461B - Control method of multi-connected unit and multi-connected unit - Google Patents
Control method of multi-connected unit and multi-connected unit Download PDFInfo
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- CN104913461B CN104913461B CN201510383292.6A CN201510383292A CN104913461B CN 104913461 B CN104913461 B CN 104913461B CN 201510383292 A CN201510383292 A CN 201510383292A CN 104913461 B CN104913461 B CN 104913461B
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- heat exchanger
- indoor heat
- joint unit
- control method
- compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of a multi-connected unit and the multi-connected unit. The multi-connected unit comprises a compressor, an indoor heat exchanger and a heater using a refrigerant as a heat source, and is characterized in that the control method comprises the following steps: and in the process of putting the heater into use, judging whether the operating environment of the multi-connected unit meets a preset indoor unit icing condition, and if the operating environment of the multi-connected unit meets the preset indoor unit icing condition, communicating the indoor heat exchanger with the outlet of the compressor. The control method of the multi-connected unit and the multi-connected unit can enable the temperature of the indoor heat exchanger to be higher under the condition that the operating environment of the multi-connected unit meets the preset indoor unit icing condition, so that the indoor heat exchanger can be prevented from dewing ice when a heater is used, the indoor heat exchanger can be prevented from icing in the defrosting process, and the technical problem that abnormal noise is generated due to the icing of the indoor unit is solved.
Description
Technical field
The present invention relates to air-conditioning equipment field, the control method of more particularly to a kind of multi-joint unit and multi-joint unit.
Background technology
For the multi-joint unit of prior art during water heating, indoor set is at low-pressure side, if outdoor is low temperature ring
Border, outdoor heat exchanger understand frosting, and after outdoor heat exchanger knot expires frost, unit will carry out Defrost operation.During Defrost operation, room
Interior machine is in low-pressure side (evaporation side).After defrosting terminates, indoor set is still in low-pressure side, but now indoor set electronic expansion
Valve is shut, and no refrigerant flows through inside indoor set heat exchanger, but is accumulated in during defrost in indoor set heat exchanger
Refrigerant, can slowly it evaporate.
Now indoor set heat exchanger surface temperature is less than the dew-point temperature of room air, so air can heat exchanger indoors
Surface slowly condensation, and show to form the globule in fin.Because indoor set is in low-pressure side, indoor heat exchanger surface temperature highest
It is exactly the environment temperature of indoor, these globules are difficult evaporation, can only be hung on fin.
After multiple defrosting cycles, the globule for hanging over indoor set heat exchanger surface can be more and more, and now unit is again
During secondary entrance Defrost operation, because indoor set pressure is very low during defrosting, a large amount of globules condensed between original fin can moment
Become ice, and the volume of ice is more than water, ice meeting crushing failure at high speed fin, and send noise.
The content of the invention
It is an object of the invention to provide a kind of control method of multi-joint unit and multi-joint unit, it is intended to solves multi-joint unit
Heater is in use, multi-joint unit indoor set sends the technical problem of abnormal sound noise because of icing at low ambient temperatures.
First aspect present invention provides a kind of control method of multi-joint unit, and the multi-joint unit includes compressor, interior
Heat exchanger and the heater using refrigerant as thermal source, the control method include：During the heater comes into operation, sentence
Whether the running environment of the disconnected multi-joint unit meets predetermined indoor set ice-formation condition, if the running environment of the multi-joint unit
Meet the predetermined indoor set ice-formation condition, make the outlet of the indoor heat exchanger and the compressor.
Further, if the running environment of the multi-joint unit meets the predetermined indoor set ice-formation condition, institute is also made
State and refrigerant flowing is kept in indoor heat exchanger.
Further, the predetermined indoor set ice-formation condition includes：Environment temperature T is less than the first predetermined temperature T1.
Further, if the environment temperature T is more than or equal to the first predetermined temperature T1, the control method is also
Including：Judge whether the environment temperature T is more than the second predetermined temperature T2, if the environment temperature T pre- more than described second
Constant temperature degree T2, then make the inlet communication of the indoor heat exchanger and the compressor.
Further, if the environment temperature T is more than the second predetermined temperature T2, also make in the indoor heat exchanger
There is no refrigerant flowing.
Further, the control method also includes：If the environment temperature T is more than or equal to the described first pre- constant temperature
Spend T1 and be less than or equal to the second predetermined temperature T2, then the state of the indoor heat exchanger is kept constant.
Further, the predetermined indoor set ice-formation condition includes：The indoor heat exchanger frosting or condensation.
Further, if the non-frosting of the indoor heat exchanger does not condense, the indoor heat exchanger and the compressor are made
Inlet communication.
Further, if the non-frosting of the indoor heat exchanger does not condense, also make there is no refrigerant in the indoor heat exchanger
Flowing.
Further, the multi-joint unit also includes high-pressure air pipe, liquid pipe, low pressure gas pipe, the first reversal valve, the second commutation
Valve, the first control valve and the second control valve, the indoor heat exchanger and the heater be connected in parallel in the liquid pipe with it is described
Between low pressure gas pipe, the first end of the high-pressure air pipe is connected with the outlet of the compressor, the second end of the high-pressure air pipe
It is connected with the liquid pipe, first control valve is arranged on the high-pressure air pipe, and the first end of the low pressure gas pipe passes through institute
The import that the first reversal valve is stated with the compressor is connected, the second end of the low pressure gas pipe respectively with the high-pressure air pipe and institute
Liquid pipe connection is stated, second control valve is arranged on the low pressure gas pipe, and first reversal valve is used to control the low pressure
Break-make between the outlet of tracheae and the compressor and the break-make between the import of the compressor, second reversal valve
For controlling the break-make between the outlet of the liquid pipe and the compressor and the break-make between the import of the compressor, institute
State the state that control method includes controlling the indoor heat exchanger by first reversal valve.
Second aspect of the present invention provides a kind of multi-joint unit, including compressor, indoor heat exchanger and using refrigerant as thermal source
Heater, the multi-joint unit also include control device, any one of the control device application first aspect present invention
Control method control the multi-joint unit.
Control method and multi-joint unit based on multi-joint unit provided by the invention, the control method of multi-joint unit are included in
During heater comes into operation, judge whether the running environment of multi-joint unit meets predetermined indoor set ice-formation condition, if
The running environment of multi-joint unit meets predetermined indoor set ice-formation condition, makes the outlet of indoor heat exchanger and compressor.This sets
In the case that the running environment put in multi-joint unit meets predetermined indoor set ice-formation condition, make the temperature of indoor heat exchanger higher,
So as to prevent indoor heat exchanger condensation ice when using heater, and then indoor heat exchanger knot is prevented during defrost
Ice, solves the technical problem that abnormal sound noise is sent because of indoor set icing.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the multi-joint unit principle schematic of the control method of the multi-joint unit of the application present invention.
Fig. 2 switches to for the first reversal valve in the multi-joint unit shown in Fig. 1 connects the outlet of indoor heat exchanger and compressor
Logical and principle schematic when being in high-pressure side.
Fig. 3 switches to for the first reversal valve in the multi-joint unit shown in Fig. 1 connects the import of indoor heat exchanger and compressor
Logical and principle schematic when being in low-pressure side.
Fig. 4 is the flow chart of the control method of the multi-joint unit of the specific embodiment of the invention.
Into Fig. 3, each reference represents Fig. 1 respectively：
20th, compressor；
21st, outdoor heat exchanger；
22nd, outdoor throttling arrangement；
23rd, the first reversal valve；
24th, the second reversal valve；
25th, the first stop valve；
26th, the second stop valve；
27th, the 3rd stop valve；
28th, the first indoor heat exchanger；
29th, the first indoor throttling arrangement；
30th, the second indoor heat exchanger；
31st, throttling arrangement in second Room；
32nd, hot water generator；
33rd, hot water generator throttling arrangement；
34th, the first control valve；
35th, the second control valve；
36th, high-pressure air pipe；
37th, low pressure gas pipe；
38th, liquid pipe.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Unless specifically stated otherwise, the part and positioned opposite, the digital table of step otherwise illustrated in these embodiments
Do not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for the ease of description, each portion shown in accompanying drawing
The size divided not is to be drawn according to the proportionate relationship of reality.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, the technology, method and apparatus should be considered as authorizing explanation
A part for book.In shown here and discussion all examples, any occurrence should be construed as merely exemplary, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label
Similar terms is represented in following accompanying drawing with letter, therefore, once it is defined in a certain Xiang Yi accompanying drawing, then subsequent attached
It need not be further discussed in figure.
If referring to that a part is connected with another part, being somebody's turn to do " connection " includes between a part and another part
There is no being directly connected to for other parts, including being set between a part and another part between one or more of the other part yet
Connect in succession.
Fig. 1 is the principle schematic of the multi-joint unit of the control method of the multi-joint unit of the application present invention.
Commutated as shown in figure 1, the multi-joint unit includes compressor 20, outdoor heat exchanger 21, outdoor throttling arrangement 22, first
Valve 23, the second reversal valve 24, the first stop valve 25, the second stop valve 26, the 3rd stop valve 27, the first indoor heat exchanger 28,
One indoor throttling arrangement 29, the second indoor heat exchanger 30, throttling arrangement 31, hot water generator 32, hot water generator in second Room
Throttling arrangement 33, the first control valve 34, the second control valve 35, high-pressure air pipe 36, low pressure gas pipe 37 and liquid pipe 38.
Two indoor heat exchangers and a heater are shared in the present embodiment.
Two indoor heat exchangers are respectively and the first indoor heat exchanger 28 and the second indoor heat exchanger 30.First indoor throttling
Device 29 is connected with the first indoor heat exchanger 28 to control the cold medium flux of the first indoor heat exchanger 28, throttling arrangement in second Room
31 connect with the second indoor heat exchanger 30 to control the cold medium flux of the second indoor heat exchanger 30.
One heater is hot water generator 32.Hot water generator throttling arrangement 33 is connected with hot water generator 32 to control
The cold medium flux of hot water generator 32.
Each indoor heat exchanger and heater are connected in parallel between liquid pipe 38 and low pressure gas pipe 37.
In the present embodiment, the first indoor throttling arrangement 29 is electric expansion valve with throttling arrangement 31 in second Room.
The first end of high-pressure air pipe 36 is connected with the outlet of compressor 20, and the second end and the liquid pipe 38 of high-pressure air pipe 36 connect
Connect.First stop valve 25 and the first control valve 34 are arranged on high-pressure air pipe 36.
The first end of low pressure gas pipe 37 is connected by the first reversal valve 23 with the import of compressor 20, and the of low pressure gas pipe 37
Two ends are connected respectively with liquid pipe 38 and high-pressure air pipe 36.Second stop valve 26 and the second control valve 35 are arranged at low pressure gas pipe 37
On.
Break-make that first reversal valve 23 is used to control between the outlet of low pressure gas pipe 37 and compressor 20 and with compressor 20
Import between break-make.
As shown in figure 1, the first reversal valve 23 is the first four-way valve, including the first port A1, the second port A2, third connectivity mouth
A3 and the 4th port A4.Wherein, the first port A1 is connected with the outlet of compressor 20, is also connected with high-pressure air pipe 36, and second is logical
Mouthful A2 is connected with the first end of first segment flow tube, third connectivity mouth A3 respectively with the second end of first segment flow tube and entering for compressor 20
Mouth connection, the 4th port A4 are connected with low pressure gas pipe 37.First reversal valve 23 can connect in the first port A1 and the second port A2
The position of logical and third connectivity mouth A3 and the 4th port A4 connections is connected with the first port A1 and the 4th port A4 and the second port A2
Switch between the position of third connectivity mouth A3 connections.
Break-make that second reversal valve 24 is used to control between the outlet of liquid pipe 38 and compressor 20 and enter with compressor 20
The break-make of mouth.
As shown in figure 1, the second reversal valve 24 is the second four-way valve, including the first port B1, the second port B2, third connectivity mouth
B3 and the 4th port B4.Wherein, the first port B1 is connected with the outlet of compressor 20, is also connected with high-pressure air pipe 36, and second is logical
Mouth B2 is connected with liquid pipe 38, and the 4th port B4 is connected with the first end of the second throttle pipe, and third connectivity mouth B3 throttles with second respectively
The import at the second end and compressor 20 of pipe connects.Second reversal valve 24 can the first port B1 and the second port B2 connection and
The position of third connectivity mouth B3 and the 4th port B4 connections is connected with the first port B1 and the 4th port B4 and the second port B2 and the
Switch between the position of three port B3 connections.
Outdoor heat exchanger 21, the stop valve 27 of outdoor throttling arrangement 22 and the 3rd are sequentially connected in series in liquid pipe 38.Outdoor throttling
Device 22 is electric expansion valve.
In other unshowned embodiments, the outdoor unit of multi-joint unit can also more parallel connections；Indoor set can be 1
Or three more parallels；Heater can more parallel connections.The control of the multi-joint applicable multi-joint unit of the invention of unit above
Method.
As described in the background art, when multi-joint unit uses heater at low ambient temperatures, when multi-joint unit enters
After defrost process, indoor heat exchanger be present and freeze and send the technical problem of abnormal sound noise.To solve the technical problem, the present invention
Embodiment provides a kind of control method of multi-joint unit.The control method includes：During heater comes into operation, judge
Whether the running environment of multi-joint unit meets predetermined indoor set ice-formation condition, if the running environment of multi-joint unit meets predetermined room
Interior machine ice-formation condition, make the outlet of indoor heat exchanger and compressor.
In the case that the running environment for being arranged on multi-joint unit meets predetermined indoor set ice-formation condition, make indoor heat exchanger
Because in the high-pressure side of multi-joint unit and temperature is higher, so as to prevented when using heater indoor heat exchanger condense ice,
And then prevent indoor heat exchanger from freezing during defrost, solve the technical problem that abnormal sound noise is sent because of indoor set icing.
Preferably, if the running environment of multi-joint unit meets predetermined indoor set ice-formation condition, also make in indoor heat exchanger
Refrigerant flowing is kept, it is highly preferred that making to keep refrigerant flowing in indoor heat exchanger with minimum refrigerant amount of flow.Make indoor heat exchanger
It is middle to keep refrigerant flowing to be beneficial to the temperature that indoor heat exchanger surface keeps higher, hang over indoor heat exchange after making a defrosting process
The globule rapid evaporation on device surface, and during next defrosting, because indoor heat exchanger surface does not have the globule, so that will not
There is the icing of globule moment, also the caused abnormal sound noise there will be no the fin of frozen beads extruding indoor heat exchanger.
Wherein predetermined indoor set ice-formation condition for example can be less than the first predetermined temperature T1 including environment temperature T, can be with
Including indoor heat exchanger frosting or condensation.Environment temperature T is less than the first predetermined temperature T1 and indoor heat exchanger frosting or condensation two
Individual condition can be used individually, can also two conditional joints uses.
Fig. 2 switches to for the first reversal valve in the multi-joint unit shown in Fig. 1 connects the outlet of indoor heat exchanger and compressor
Logical and principle schematic when being in high-pressure side.Fig. 3 switches to for the first reversal valve in the multi-joint unit shown in Fig. 1 changes interior
The inlet communication of hot device and compressor and principle schematic when being in low-pressure side.Fig. 4 is the multi-joint of the specific embodiment of the invention
The flow chart of the control method of unit.Illustrate the control of the multi-joint unit of the specific embodiment of the invention below with reference to Fig. 2 to Fig. 4
Method.In the present embodiment, predetermined indoor set ice-formation condition is less than the first predetermined temperature T1 including environment temperature T simultaneously and interior is changed
Hot device frosting or condensation.
As shown in figure 4, in the present embodiment, after being heated using heater to external fluid, control process starts.First
Judge whether environment temperature T is less than the first predetermined temperature T1.If environment temperature T is less than the first predetermined temperature T1, further
Judge indoor heat exchanger whether frosting or condensation, if indoor heat exchanger frosting or condensation, the running environment of multi-joint unit expires
The predetermined indoor set ice-formation condition of foot, make the outlet of indoor heat exchanger and compressor 20.Preferably, also make in indoor heat exchanger
Keep minimum refrigerant amount of flow.
If environment temperature T is more than or equal to the first predetermined temperature T1, it is predetermined to judge whether environment temperature T is more than second
Temperature T2, if environment temperature T is more than the second predetermined temperature T2, make the inlet communication of indoor heat exchanger and compressor.It is preferred that
Ground, also make there is no refrigerant flowing in indoor heat exchanger.Because environment temperature T is higher, indoor heat exchanger does not have risk of icing, this
When, indoor heat exchanger is in low-pressure side and make no refrigerant flowing in indoor heat exchanger that unnecessary energy can be avoided to damage
Lose.
If environment temperature T is more than or equal to the first predetermined temperature T1 and is less than or equal to the second predetermined temperature T2, room
The state of interior heat exchanger keeps constant.
Wherein, the first predetermined temperature T1 and the second predetermined temperature T2 can be factory-default, can also the later stage it is artificial again
Setting.
If the non-frosting of indoor heat exchanger does not condense, make the inlet communication of indoor heat exchanger and compressor.Preferably, also
Make there is no refrigerant flowing in indoor heat exchanger.
In addition, in the present embodiment, control method includes the state that indoor heat exchanger is controlled by the first reversal valve 23.
As shown in Fig. 2 now, the first control valve 34 is opened, the second control valve 35 is closed, hot water generator throttling arrangement 33
Opening, outdoor throttling arrangement 22 are opened, and the second reversal valve 24 switches to the second port B2 and connected with third connectivity mouth B3, so that liquid
The inlet communication of pipe 38 and compressor 20, namely it is in heat hot water as the hot water generator 33 of the heater in multi-joint unit
Use during.
Wherein, the first reversal valve 23 switches to the first port A1 and the 4th port A4 connections, the second port A2 and threeway
The position of mouth A3 connections.First port A1 and the 4th port A4 connections make the first indoor heat exchanger 28 and the second indoor heat exchanger 30
Two indoor heat exchangers pass through the second stop valve 26 and the port A1 of the first reversal valve 23 first and the 4th port A4 and compressor 20
Outlet, i.e. two indoor heat exchangers have been in the high-pressure side of multi-joint unit.
In addition, throttling arrangement 31 in the first indoor throttling arrangement 29 and second Room is set to open certain step number, you can to keep the
The minimum refrigerant amount of flow of one indoor heat exchanger 28 and the second indoor heat exchanger 30, so as to keep two indoor heat exchangers higher
Surface temperature, the globule for making to hang over indoor set heat exchanger surface after a defrosting process evaporates quickly, and is removed next
During frost, because indoor heat exchanger surface does not have the globule, there will be no heat exchanger fin in globule moment icing extrusion chamber, no
Abnormal sound noise can be sent.
As shown in figure 3, now, the first control valve 34 is opened, the second control valve 35 is closed, hot water generator throttling arrangement 33
Opening, outdoor throttling arrangement 22 are opened, and the second reversal valve 24 switches to the second port B2 and connected with third connectivity mouth B3, so that liquid
The inlet communication of pipe 38 and compressor 20, namely it is in heat hot water as the hot water generator 33 of the heater in multi-joint unit
Use during.
Wherein, the first reversal valve 23 switches to the first port A1 and the second port A2 connections, third connectivity mouth A3 and four-way
The position of mouth A4 connections, third connectivity mouth A3 and the 4th port A4 connections make the first indoor heat exchanger 28 and the second indoor heat exchanger 30
Two indoor heat exchangers pass through the second stop valve 26 and the third connectivity mouth A3 and the 4th port A4 and compressor of the first reversal valve 23
20 inlet communication, i.e. two indoor heat exchangers are in the low-pressure side of multi-joint unit.
In addition, it is turned off throttling arrangement 31 in the first indoor throttling arrangement 29 and second Room, you can to change the first interior
Refrigerant is not had in the hot indoor heat exchanger 30 of device 28 and second to flow through, therefore is not had and caused because refrigerant flows through indoor heat exchanger
The situation of thermal loss.
The present embodiment also provides a kind of multi-joint unit, the multi-joint unit include compressor, indoor heat exchanger and using refrigerant as
The heater of thermal source, the multi-joint unit also include control device, and control device controls the multi-connected machine using foregoing control method
Group.
For example, control device can include comparison module and the control module coupled with comparison module.Comparison module is used for
Judge whether the running environment of multi-joint unit meets predetermined indoor set ice-formation condition, and comparative result is delivered to control module.
Control module is used to control the state change of indoor heat exchanger, for example, the outlet of control indoor heat exchanger and compressor and
Indoor heat exchanger is in high-pressure side, or control the inlet communication of indoor heat exchanger and compressor and be in indoor heat exchanger
Low-pressure side etc..
From the above description, it can be seen that in above example of the present invention, multi-joint unit can be according to outdoor environment temperature and room
Interior heat exchanger frosting or condensation situation make indoor heat exchanger automatically switch in high-pressure side and low-pressure side, multi-joint so as to solve well
Unit when low ambient temperature uses heater, after multi-joint unit enters defrost process, because icing sends abnormal sound make an uproar by indoor set
The problem of sound；And at " high environment temperature water heating ", unit can automatically switch indoor set state, not allow indoor set to have cold
Matchmaker is flowed through, and avoids thermal loss.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (11)
1. a kind of control method of multi-joint unit, the multi-joint unit includes compressor, indoor heat exchanger and using refrigerant as thermal source
Heater, it is characterised in that the control method includes：During the heater comes into operation, judge described more
Whether online group of running environment meets predetermined indoor set ice-formation condition, if described in the running environment satisfaction of the multi-joint unit
Predetermined indoor set ice-formation condition, make the outlet of the indoor heat exchanger and the compressor.
2. the control method of multi-joint unit according to claim 1, it is characterised in that if the operation of the multi-joint unit
Environment meets the predetermined indoor set ice-formation condition, also makes to keep refrigerant flowing in the indoor heat exchanger.
3. the control method of multi-joint unit according to claim 1, it is characterised in that the predetermined indoor set ice-formation condition
Including：Environment temperature T is less than the first predetermined temperature T1.
4. the control method of multi-joint unit according to claim 3, it is characterised in that if the environment temperature T is more than
Or also include equal to the first predetermined temperature T1, the control method：It is predetermined to judge whether the environment temperature T is more than second
Temperature T2, if the environment temperature T is more than the second predetermined temperature T2, make the indoor heat exchanger and the compressor
Inlet communication.
5. the control method of multi-joint unit according to claim 4, it is characterised in that if the environment temperature T is more than
The second predetermined temperature T2, also make there is no refrigerant flowing in the indoor heat exchanger.
6. the control method of the multi-joint unit according to any one of claim 3 to 5, it is characterised in that the controlling party
Method also includes：If the environment temperature T is more than or equal to the first predetermined temperature T1 and is less than or equal to the second pre- constant temperature
T2 is spent, then the state of the indoor heat exchanger is kept constant.
7. the control method of multi-joint unit according to any one of claim 1 to 5, it is characterised in that the predetermined room
Interior machine ice-formation condition includes：The indoor heat exchanger frosting or condensation.
8. the control method of multi-joint unit according to claim 7, it is characterised in that if the indoor heat exchanger is not tied
Frost does not condense, makes the inlet communication of the indoor heat exchanger and the compressor.
9. the control method of multi-joint unit according to claim 8, it is characterised in that if the indoor heat exchanger is not tied
Frost does not condense, also makes do not have refrigerant flowing in the indoor heat exchanger.
10. the control method of multi-joint unit according to any one of claim 1 to 5, it is characterised in that the multi-connected machine
Group also includes high-pressure air pipe, liquid pipe, low pressure gas pipe, the first reversal valve, the second reversal valve, the first control valve and the second control valve,
The indoor heat exchanger and the heater are connected in parallel between the liquid pipe and the low pressure gas pipe, the high-pressure air pipe
First end is connected with the outlet of the compressor, and the second end of the high-pressure air pipe is connected with the liquid pipe, first control
Valve is arranged on the high-pressure air pipe, and the first end of the low pressure gas pipe is entered by first reversal valve and the compressor
Mouth connection, the second end of the low pressure gas pipe are connected with the high-pressure air pipe and the liquid pipe respectively, and second control valve is set
It is placed on the low pressure gas pipe, between outlet of first reversal valve for controlling the low pressure gas pipe and the compressor
Break-make and the break-make between the import of the compressor, second reversal valve are used to control the liquid pipe and the compressor
Outlet between break-make and the break-make between the import of the compressor, the control method include changed by described first
The state of the indoor heat exchanger is controlled to valve.
11. a kind of multi-joint unit, including compressor, indoor heat exchanger and the heater using refrigerant as thermal source, it is characterised in that institute
Stating multi-joint unit also includes control device, the control method any one of the control device application claim 1 to 10
Control the multi-joint unit.
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| JP6252627B2 (en) * | 2016-06-01 | 2017-12-27 | ダイキン工業株式会社 | Multi-type air conditioner |
| CN109612021B (en) * | 2018-11-28 | 2021-04-20 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioning system abnormal sound control method and multi-connected air conditioning system |
| KR20210096522A (en) * | 2020-01-28 | 2021-08-05 | 엘지전자 주식회사 | Air conditioning apparatus |
| CN112539456B (en) * | 2020-12-18 | 2024-11-15 | 珠海格力电器股份有限公司 | A multi-connected air conditioner and control method thereof |
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