CN104089427B - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN104089427B CN104089427B CN201410287199.0A CN201410287199A CN104089427B CN 104089427 B CN104089427 B CN 104089427B CN 201410287199 A CN201410287199 A CN 201410287199A CN 104089427 B CN104089427 B CN 104089427B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003507 refrigerant Substances 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 25
- 238000010257 thawing Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 66
- 239000006200 vaporizer Substances 0.000 description 10
- 238000011897 real-time detection Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000006837 decompression Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioning system which comprises a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger, wherein the compressor, the indoor heat exchanger, the throttling device and the outdoor heat exchanger are sequentially connected to form a circulation loop, the outdoor heat exchanger is divided into a first flow path and a second flow path, the first flow path and the second flow path are both connected in series with the throttling device and connected to the indoor heat exchanger, a first electronic valve is further connected between the first flow path and the second flow path in series, the first flow path and the second flow path are respectively connected in series with the valve device and connected to a first four-way valve, so that a first valve port of the first four-way valve is communicated with the first flow path or the second flow path, a refrigerant enters the first flow path, and enters the second flow path after being throttled by the throttling device, or enters the first flow path after being throttle. The invention also relates to two control methods of the air conditioning system. The air conditioning system and the control method thereof improve the defrosting speed and effect of the outdoor heat exchanger and ensure the heating effect of the air conditioner.
Description
Technical field
The present invention relates to air-conditioner technical field, more particularly to a kind of air conditioning system and its control method.
Background technology
When pump type heat unit carries out heating operation in the winter time, the surface of outdoor heat exchanger can gradually frosting, with frost layer
Thicken, the exchange capability of heat of heat exchanger constantly declines, and heating effect is gradually lowered, and now should carry out defrost.
General defrosting method includes shutting down two methods of translative mode defrost and hot-gas bypass defrost.And general steam
Bypass defrosting method, the coolant of High Temperature High Pressure first passes through after hot-gas bypass branch road is mixed with the coolant in indoor heat exchanger and enters back into
Outdoor heat exchanger carries out heat exchange defrost so that the speed of defrost is slower, and the effect of defrost is poor, impact indoor heat exchanger
Heating effect.
Content of the invention
In view of the present situation of prior art, it is an object of the invention to provide a kind of air conditioning system and its control method, in sky
In the case that adjusting system persistently heats, improve the defrost speed of outdoor heat exchanger, enhance the defrost effect of outdoor heat exchanger.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of air conditioning system, including compressor, outdoor heat exchanger, throttling arrangement and indoor heat exchanger, described compressor, institute
State indoor heat exchanger, described throttling arrangement and described outdoor heat exchanger and be in turn connected to form closed circuit,
Also include the first cross valve, described first cross valve is serially connected between described outdoor heat exchanger and described compressor,
The air vent of described compressor connects the first valve port of described first cross valve, the second valve port connection institute of described first cross valve
State indoor heat exchanger, the 3rd valve port of described first cross valve connects the air entry of described compressor after concatenating gas-liquid separator,
4th valve port of described first cross valve connects described outdoor heat exchanger,
Described outdoor heat exchanger is divided into first flow path and second flow path, described first flow path and described second flow path all to concatenate
Described throttling arrangement connects to described indoor heat exchanger, is also serially connected with the first electricity between described first flow path and described second flow path
Sub- valve, described first flow path and described second flow path concatenate valving respectively and connect to described first cross valve so that institute
The first valve port stating the first cross valve connects described first flow path or described second flow path, and high temperature refrigerant enters described first-class
Road, enters described second flow path after the throttling of described throttling arrangement, or high temperature refrigerant enters described second flow path, through described throttling
Described first flow path is entered after device throttling.
Wherein in an embodiment, described valving includes the second electronic valve, the 3rd electronic valve and the 4th electricity
Sub- valve；
Described outdoor heat exchanger includes four ports, respectively first port, second port, the 3rd port and the 4th end
Mouthful, described first port is connected with described second port and forms described first flow path, described 3rd port and described 4th end
Mouth is connected and forms described second flow path；Described first electronic valve is serially connected in described first port and described first cross valve
Between 4th valve port；
Described second electronic valve is serially connected between described first port and the first valve port of described first cross valve, described
3rd electronic valve is serially connected between described 3rd port and the first valve port of described first cross valve, described 4th electronic valve
It is serially connected between the 3rd port and the 4th valve port of described first cross valve.
Wherein in an embodiment, described valving includes the second cross valve and the 5th electronic valve；
Described outdoor heat exchanger includes four ports, respectively first port, second port, the 3rd port and the 4th end
Mouthful, described first port is connected with described second port and forms described first flow path, described 3rd port and described 4th end
Mouth is connected and forms described second flow path；Described first electronic valve be serially connected in described first port and described 3rd port it
Between；
First valve port of described second cross valve concatenates described 5th electronic valve and connects to the of described first cross valve
One valve port, the second valve port of described second cross valve connects to described 3rd port；3rd valve port of described second cross valve is even
Connect the 4th valve port of described first cross valve, the 4th valve port of described second cross valve connects to described first port.
Wherein in an embodiment, described throttling arrangement includes first throttle device and second throttling device；
Described first flow path concatenates described first throttle device and connects to described indoor heat exchanger, and described second concatenates institute
State second throttling device to connect to described indoor heat exchanger.
Wherein in an embodiment, described outdoor heat exchanger includes diverter and discharge；
The quantity of described diverter is two, the respectively first diverter and the second diverter, the quantity of described discharge
For two, the respectively first discharge and the second discharge；
First diverter described in described first throttle device serial connection, described first discharge is corresponding with described first diverter
Connection forms first flow path, and described second throttling device concatenates described second diverter, described second discharge and described second
The corresponding connection of diverter forms second flow path.
Wherein in an embodiment, multiple points of multiple isocons of described first diverter and described second diverter
Flow tube is set in parallel in the main body of described outdoor heat exchanger, and multiple isocons of described first diverter and described second shunt
The arrangement mode of multiple isocons of device is point of an isocon of described first diverter and described second diverter
Flow tube is alternately arranged, and cycle arrangement is in the main body of described outdoor heat exchanger.
Wherein in an embodiment, multiple points of multiple isocons of described first diverter and described second diverter
Flow tube is set in parallel in the main body of described outdoor heat exchanger, and multiple isocons of described first diverter are arranged on described outdoor
The top of the main body of heat exchanger, multiple isocons of described second diverter are arranged under the main body of described outdoor heat exchanger
Portion.
The invention still further relates to a kind of control method of air conditioning system, for above-mentioned air conditioning system, comprise the steps:
When outdoor heat exchanger enters defrost pattern, the second electronic valve of controller control valve door gear and the 4th electronics
Valve is opened, and the 3rd electronic valve of the first electronic valve and described valving is closed so that the first valve of the first cross valve
Mouth connection first flow path；
Or the second electronic valve of controller control valve door gear and the 4th electronic valve are closed, the first electronic valve and
3rd electronic valve of described valving opens the first valve port connection second flow path so that the first cross valve.
Wherein in an embodiment, also comprise the steps:
At the end of outdoor heat exchanger defrost, controller controls the 4th electronics of the first electronic valve and described valving
Valve is opened, and the second electronic valve of described valving and the 3rd electronic valve are closed so that the 4th valve of the first cross valve
Mouth connects first flow path and second flow path simultaneously.
The present invention also provides a kind of control method of air conditioning system, for above-mentioned air conditioning system, comprises the steps:
When outdoor heat exchanger enters defrost pattern, controller controls the first electronic valve to cut out, and the 5th of valving the
Electronic valve is opened, the second cross valve of described valving first valve port connect described second cross valve the second valve port or
4th valve port of described second cross valve is so that the first valve port of the first cross valve connects second flow path or first flow path.
Wherein in an embodiment, also comprise the steps:
At the end of outdoor heat exchanger defrost, controller controls the first electronic valve to open, and the 5th of described valving the
Electronic valve close, the second cross valve of described valving first valve port connect described second cross valve the second valve port or
4th valve port of described second cross valve is so that the 4th valve port of the first cross valve connects first flow path and second flow path simultaneously.
The invention has the beneficial effects as follows:
The air conditioning system of the present invention and its control method, when outdoor heat exchanger needs to carry out defrost, valving controls
First valve port of the first cross valve selectively connects first flow path or the second flow path of outdoor heat exchanger, from the discharge of compressor
The coolant of High Temperature High Pressure two-way is divided into by the first cross valve, a road coolant get in heat exchanger heated so that
Hot blast is still had to blow out during air-conditioning defrost；Another road coolant is directly entered outdoor heat exchange by first flow path or second flow path
Device carries out defrost, improves defrost speed, enhances defrost effect；Then enter back into outdoor heat exchanger after the mixing of two-way coolant to steam
Send out and heat the heating effect it is ensured that air conditioning system；Finally, coolant returns to the air entry of compressor, completes once to heat circulation.
Brief description
Fig. 1 is the refrigerant circulation schematic diagram of scheme a of air conditioning system one embodiment of the present invention；
Fig. 2 is the refrigerant circulation schematic diagram of the scheme b of air conditioning system one embodiment of the present invention；
The heating operations refrigerant circulation schematic diagram of air conditioning system one embodiment of Fig. 3 present invention；
Fig. 4 is the position relationship schematic diagram of diverter and discharge one embodiment；
Fig. 5 is the position relationship schematic diagram of diverter and another embodiment of discharge；
Fig. 6 is the schematic diagram of another embodiment of air conditioning system of the present invention；
Fig. 7 is the flow chart of control method one embodiment of air conditioning system of Fig. 1；
Fig. 8 is the flow chart of another embodiment of control method of air conditioning system of Fig. 6.
Specific embodiment
In order that technical scheme is clearer, below in conjunction with accompanying drawing, the air-conditioning system to the present invention of the present invention
System and its control method are described in further detail.It should be appreciated that specific embodiment described herein is only in order to explain this
Invention is not intended to limit the present invention.
Referring to Fig. 1 to Fig. 8, as shown in figure 1, the air conditioning system of the present invention includes compressor 1, indoor heat exchanger 12, outdoor
Heat exchanger 7, the first cross valve 2, throttling arrangement and valving.Wherein, compressor 1, indoor heat exchanger 12, throttling arrangement and room
External heat exchanger 7 is in turn connected to form closed circuit, and coolant is circulating in this closed circuit, realizes air conditioning system and persistently makes
The function of heat.
Wherein, the first cross valve 2 is serially connected between outdoor heat exchanger 7 and compressor 1.First cross valve 2 includes four valves
Mouthful, in order to express easily, four valve ports of the first cross valve 2 are respectively labeled as the first valve port a, the second valve port b, the 3rd valve port c
With the 4th valve port d.The air vent of compressor 1 connect to the first cross valve the first valve port a so that from compressor discharge
The coolant of High Temperature High Pressure enters in the first cross valve 2.Second valve port b of the first cross valve is connected with the first valve port a, the second valve port
B connects indoor heat exchanger 12, and so, the coolant of the High Temperature High Pressure discharged from compressor is got in by the first cross valve 2 and changes
In hot device 12, now indoor heat exchanger 12 is as condenser, coolant condensation liquefaction heat release in heat exchanger 12 indoors, will be indoor
Air heats, and realizes heating of air conditioning system.
3rd valve port c of the first cross valve 2 connects the air entry of compressor 1, the first four-way after concatenating gas-liquid separator 13
4th valve port connection outdoor heat exchanger 7 of valve 2, the 4th valve port d of the first cross valve 2 is connected with the 3rd valve port c.So, cold
After matchmaker's evaporation endothermic in outdoor heat exchanger, return to the air entry of compressor by the first cross valve.Gas-liquid separator is used for will
Liquid refrigerants and gaseous coolant are separated so that liquid refrigerants can not enter the air entry of compressor it is ensured that compressor operating
Reliability.
Outdoor heat exchanger 7 is divided into first flow path and second flow path, first flow path and second flow path all to concatenate throttling arrangement even
It is connected to indoor heat exchanger 12, between first flow path and second flow path, be also serially connected with the first electronic valve 5, first flow path and second
Road concatenate respectively valving connect to the first cross valve 2 so that the first cross valve 2 first valve port a connection first flow path or
Second flow path, high temperature refrigerant enters first flow path, enters second flow path after throttling arrangement throttling, or high temperature refrigerant enters second
Stream, enters first flow path after throttling arrangement throttling.
When first flow path is connected with the first valve port a of the first cross valve 2, the high temperature refrigerant that compressor is discharged passes through first
Cross valve is divided into two-way, and first via high temperature refrigerant gets in and heats in heat exchanger 12 it is ensured that still there being hot blast to blow during defrost
Go out.Second road high temperature refrigerant is directly entered outdoor heat exchanger by first flow path and carries out defrost, improves the change of outdoor heat exchanger
White speed, enhances the defrost effect of outdoor heat exchanger.Then, with first via coolant after the second road coolant throttles through throttling arrangement
Mixing, mixed coolant is heated by the second flow path that throttling arrangement is again introduced into outdoor heat exchanger, eventually passes back to press
The air entry of contracting machine is it is ensured that the heating effect of air conditioning system.
When second flow path is connected with the first valve port a of the first cross valve 2, the high temperature refrigerant that compressor is discharged passes through first
Cross valve is divided into two-way, and first via high temperature refrigerant gets in and heats in heat exchanger 12 it is ensured that still there being hot blast to blow during defrost
Go out.Second road high temperature refrigerant is directly entered outdoor heat exchanger by second flow path and carries out defrost, improves the change of outdoor heat exchanger
White speed, enhances the defrost effect of outdoor heat exchanger.Then, with first via coolant after the second road coolant throttles through throttling arrangement
Mixing, mixed coolant is heated by the first flow path that throttling arrangement is again introduced into outdoor heat exchanger, eventually passes back to press
The air entry of contracting machine is it is ensured that the heating effect of air conditioning system.
When first flow path is connected with the 4th valve port d of the first cross valve 2 with second flow path, high temperature refrigerant enters described room
Heat in interior heat exchanger.The high temperature refrigerant that compressor is discharged is directly entered in indoor heat exchanger and is heated, and then passes sequentially through
Throttling arrangement, outdoor heat exchanger return to the air entry of compressor, complete once to heat circulation.
When outdoor heat exchanger needs to carry out defrost, valving controls the selectable company of the first valve port of the first cross valve
The first flow path of logical outdoor heat exchanger or second flow path, pass through the first cross valve from the coolant of the High Temperature High Pressure of the discharge of compressor
It is divided into two-way, first via high temperature refrigerant gets in heat exchanger and heated so that still there being hot blast during air-conditioning defrost
Blowout；Second road high temperature refrigerant is directly entered outdoor heat exchanger by first flow path or second flow path and carries out defrost, improve
White speed, enhances defrost effect；Then enter back into outdoor heat exchanger evaporation after the mixing of two-way coolant and heat it is ensured that air-conditioning system
The heating effect of system；Finally, coolant returns to the air entry of compressor, completes once to heat circulation.
More preferably, outdoor heat exchanger 7 includes four ports, respectively first port a, second port b, the 3rd port c and
4th port d, and first port a is connected with second port b formation first flow path, the 3rd port c and the 4th port d are connected
Form second flow path.
Embodiment one
As shown in figure 1, valving includes the second electronic valve 3, the 3rd electronic valve 4 and the 4th electronic valve 6.Preferably
Ground, the first electronic valve 5, the second electronic valve 3, the 3rd electronic valve 4 and the 4th electronic valve 6 are electromagnetic valve or electronic
Valve.
Second electronic valve 3 is serially connected between first port a and the first valve port a of the first cross valve 2, the 3rd electronic valve
4 are serially connected between the 3rd port c and the first valve port a of the first cross valve 2, and the first electronic valve 5 is serially connected in first port a and
Between 4th valve port d of one cross valve 2, the 4th electronic valve 6 is serially connected in the 3rd port c and the 4th valve port d of the first cross valve 2
Between.
When outdoor heat exchanger needs to carry out defrost, the second electronic valve 3 or the 3rd of controller control valve door gear is electric
Sub- valve 4 is opened so that the first valve port a of the first cross valve 2 connects first flow path or the second flow path of outdoor heat exchanger, compression
A coolant part for the High Temperature High Pressure that machine is discharged is directly entered in outdoor heat exchanger, carries out defrost to outdoor heat exchanger, improves
The speed of defrost and effect.Meanwhile, another part coolant is got in by the first cross valve and heats it is ensured that room in heat exchanger
The heating effect of interior heat exchanger.
Embodiment two
As shown in fig. 6, valving includes the second cross valve 14 and the 5th electronic valve 17；First electronic valve 5 concatenates
Between first port a and the 3rd port c；
Second cross valve 14 includes four valve ports, in order to express easily, four valve ports labelling respectively of the second cross valve 14
For the first valve port a1, the second valve port b1, the 3rd valve port c1 and the 4th valve port d1.First valve port a1 concatenation the of the second cross valve 14
Connect after five electronic valves 17 to the first valve port a of the first cross valve 2, the second valve port b1 of the second cross valve 14 connects to the 3rd
Port c, the 3rd valve port c1 of the second cross valve 14 connect the 4th valve port d of the first cross valve 2, the 4th valve of the second cross valve 14
Mouth d connects to first port a.
When outdoor heat exchanger needs to carry out defrost, the Rule of judgment of defrost can be the temperature of the discharge of outdoor heat exchanger
Temperature of degree or outdoor environment etc..Controller controls the first electronic valve 5 to cut out, the 5th electronic valve 17 dozens of valving
Open, the first valve port a1 of the second cross valve 14 of valving connects the second valve port b1 or second cross valve of the second cross valve 14
14 the 4th valve port d1 is so that the first valve port a of the first cross valve 2 is connected with the second flow path of outdoor heat exchanger 7 or first flow path
Logical, the high temperature refrigerant part that compressor is discharged is directly entered in outdoor heat exchanger, carries out defrost to outdoor heat exchanger, improves
The speed of defrost and effect.Meanwhile, another part coolant is got in by the first cross valve and heats so that in sky in heat exchanger
Still there is hot blast blowout it is ensured that the heating effect of indoor heat exchanger during tuning into the melt frost.
As a kind of embodiment, throttling arrangement includes first throttle device 10 and second throttling device 11, and first
Stream concatenation first throttle device 10 connects to indoor heat exchanger 12, and second flow path concatenation second throttling device 11 connects to interior
Heat exchanger 12.Preferably, throttling arrangement is electric expansion valve or capillary tube.Throttling arrangement is used for the cooling decompression of coolant, adjusts
The flow of coolant.
More preferably, outdoor heat exchanger 7 includes diverter and discharge.The quantity of diverter is two, respectively first point
Stream device 8 and the second diverter 9, the quantity of discharge is two, the respectively first discharge 15 and the second discharge 16.First segment
Stream device 10 concatenates the first diverter 8, and the first discharge 15 connects formation first flow path with the first diverter 8.Second throttling dress
Put 11 concatenation the second diverters 9, the second discharge 16 connects formation second flow path with the second diverter 9.
As a kind of embodiment, as shown in figure 4, multiple isocons of the first diverter 8 and the second diverter 9 is many
Individual isocon is set in parallel in the main body of outdoor heat exchanger, multiple isocons of the first diverter 8 and the second diverter 9 many
The arrangement mode of individual isocon is that an isocon of an isocon of the first diverter 8 and the second diverter 9 is alternately arranged,
Cycle arrangement is in the main body of outdoor heat exchanger 7.Now, during the defrost of outdoor heat exchanger the flow direction of coolant there are two kinds can
Embodiment.
Scheme a:
Controller real-time detection simultaneously judges outdoor heat exchanger the need of carrying out defrost, and the Rule of judgment of defrost can be room
Temperature of the temperature of the discharge of external heat exchanger or outdoor environment etc..When outdoor heat exchanger needs defrost, as shown in figure 1, control
Device processed controls the second electronic valve 3 and the 4th electronic valve 6 to open, and the 3rd electronic valve 4 and the first electronic valve 5 are closed, this
When, the first valve port a connection first flow path of the first cross valve 2.The coolant of the High Temperature High Pressure discharged from compressor passes through the one or four
Port valve 2 is divided into two-way, and first via coolant is directly entered indoor heat exchanger 12 and is heated it is ensured that the continuing of air-conditioning during defrost
Heat.Second road coolant is directly entered in outdoor heat exchanger 7 by the second electronic valve 3, carries out defrost to outdoor heat exchanger 7,
Which enhance defrost speed and effect.So, it is not necessary to switch the operational mode of air conditioning system during defrost, can
To keep the lasting blowout hot blast of indoor heat exchanger, keep the pattern persistently heating.
Then the second road coolant is entered with first via coolant after the first diverter 8 and first throttle device 10 cooling decompression
Row mixing, mixed coolant passes through second throttling device 11 and the second diverter 9 is again introduced in outdoor heat exchanger 7.Now,
As vaporizer, coolant gasifies heat absorption in outdoor heat exchanger 7 outdoor heat exchanger 7, by the 4th electronic valve 6 and the first four-way
Valve 2 returns to the suction end of compressor 1.
As shown in figure 3, after defrost terminates, Air-condition system control the second electronic valve 3 and the 3rd electronic valve 4 are closed, the
One electronic valve 5 and the 4th electronic valve 6 are opened, and, entirely as vaporizer, the coolant discharged from compressor is complete for outdoor heat exchanger 7
Portion gets in and is heated in heat exchanger so that indoor heat exchanger is in the state that efficiently heats.
Scheme b:
Controller real-time detection simultaneously judges outdoor heat exchanger the need of carrying out defrost, and the Rule of judgment of defrost can be room
Temperature of the temperature of the discharge of external heat exchanger or outdoor environment etc..When outdoor heat exchanger needs defrost, as shown in Fig. 2 control
Device processed controls the 3rd electronic valve 4 and the first electronic valve 5 to open, and the second electronic valve 3 and the 4th electronic valve 6 are closed, this
When, the first valve port a connection second flow path of the first cross valve 2.The coolant of the High Temperature High Pressure discharged from compressor passes through the one or four
Port valve 2 is divided into two-way, and first via coolant is directly entered indoor heat exchanger 12 and is heated it is ensured that the continuing of air-conditioning during defrost
Heat.Second road coolant is directly entered in outdoor heat exchanger 7 by the 3rd electronic valve 4, carries out defrost to outdoor heat exchanger 7,
Which enhance defrost speed and effect.So, it is not necessary to switch the operational mode of air conditioning system during defrost, can
To keep the lasting blowout hot blast of indoor heat exchanger, keep the pattern persistently heating.
Then the second road coolant is mixed with first via coolant after the second diverter 9 and second throttling device 11 cooling decompression
Close, mixed coolant passes through first throttle device 10 and the first diverter 8 is again introduced in outdoor heat exchanger 7.Now, outdoor
As vaporizer, coolant gasifies heat absorption in outdoor heat exchanger 7 heat exchanger 7, by the first electronic valve 5 and the first cross valve 2
Return to the suction end of compressor.
As shown in figure 3, after defrost terminates, Air-condition system control the second electronic valve 3 and the 3rd electronic valve 4 are closed, the
One electronic valve 5 and the 4th electronic valve 6 are opened, and, entirely as vaporizer, the coolant discharged from compressor is complete for outdoor heat exchanger 7
Portion gets in and is heated in heat exchanger so that indoor heat exchanger is in the state that efficiently heats.
As another kind of embodiment, as shown in figure 5, multiple isocons of the first diverter 8 and the second diverter 9
Multiple isocons are set in parallel in the main body of outdoor heat exchanger, and multiple isocons of the first diverter 8 are disposed in the outdoor heat exchange
The top of the main body of device, multiple isocons of the second diverter 9 are disposed in the outdoor the bottom of the main body of heat exchanger.I.e. the first shunting
Outdoor heat exchanger is divided into two relatively independent parts by device 8 and the second diverter 9.Now, when needing to outdoor heat exchanger
When carrying out defrost, need to carry out defrost process respectively to two relatively independent parts of outdoor heat exchanger respectively step by step.Tool
The defrost process of body is as follows:
Step 1: controller real-time detection simultaneously judges outdoor heat exchanger the need of carrying out defrost, when outdoor heat exchanger needs
During defrost, the second electronic valve 3 and the 4th electronic valve 6 is controlled to open first, the 3rd electronic valve 4 and the first electronic valve 5
Close, the first valve port a connection first flow path of the first cross valve 2.A portion first to outdoor heat exchanger 7
Frost., as shown in figure 1, coolant flow process is identical with scheme a with defrost principle, here is omitted for refrigerant circulation process.
Step 2: after the completion of the defrost in step 1, control the 3rd electronic valve 4 and the first electronic valve 5 to open, the second electricity
Sub- valve 3 and the 4th electronic valve 6 are closed, the first valve port a connection second flow path of the first cross valve 2.Now to outdoor heat exchange
Another part of device 7 carries out defrost.Refrigerant circulation as shown in Fig. 2 coolant flow process is identical with scheme b with defrost principle, this
Place repeats no more.
As shown in figure 3, after defrost terminates, Air-condition system control the second electronic valve 3 and the 3rd electronic valve 4 are closed, the
One electronic valve 5 and the 4th electronic valve 6 are opened, and outdoor heat exchanger 7 is entirely as vaporizer, the coolant discharged from compressor 1
Fully enter and heated in indoor heat exchanger 12 so that indoor heat exchanger 12 is in the state that efficiently heats.
As shown in fig. 7, the invention still further relates to a kind of control method of air conditioning system, for the air-conditioning in above-described embodiment one
Persistently heating of system, comprises the steps:
When outdoor heat exchanger enters defrost pattern, the second electronic valve of controller control valve door gear and the 4th electronics
Valve is opened, and the 3rd electronic valve of the first electronic valve and described valving is closed so that the first valve of the first cross valve
Mouth connection first flow path.Controller real-time detection outdoor heat exchanger is the need of carrying out defrost, if outdoor heat exchanger needs to carry out
During defrost, from the coolant of the discharge of compressor, two-way is divided into by the first cross valve, first via coolant passes through the second electronic valve
Enter after outdoor heat exchanger carries out defrost and discharge through first throttle device, the second road coolant gets in heat exchanger and heated
Mix with first via coolant afterwards, mixed coolant again passes by second throttling device and enters outdoor heat exchanger, and now, outdoor is changed
Entirely as vaporizer it is ensured that the heating effect of air conditioning system, mixed coolant returns to pressure through the 4th electronic valve to hot device
The air entry of contracting machine.
Or the second electronic valve of controller control valve door gear and the 4th electronic valve are closed, the first electronic valve and
3rd electronic valve of described valving opens the first valve port connection second flow path so that the first cross valve.Controller is real
When detection outdoor heat exchanger the need of carrying out defrost, the Rule of judgment of defrost can be the temperature of the discharge of outdoor heat exchanger
Or the temperature of outdoor environment etc..If outdoor heat exchanger needs to carry out defrost, pass through the one or four from the coolant of the discharge of compressor
Port valve is divided into two-way, and first via coolant is entered after outdoor heat exchanger carries out defrost by the 3rd electronic valve and fills through the second throttling
Put discharge, the second road coolant is got in and mixed with first via coolant after heat exchanger is heated, mixed coolant warp again
Cross first throttle device and enter outdoor heat exchanger, now, outdoor heat exchanger is entirely as vaporizer it is ensured that the heating of air conditioning system
Effect, mixed coolant returns to the air entry of compressor through the first electronic valve.
When outdoor heat exchanger does not need to carry out defrost, controller controls the of the first electronic valve and described valving
Four electronic valves are opened, and the second electronic valve of described valving and the 3rd electronic valve are closed so that the first cross valve
4th valve port connects first flow path and second flow path simultaneously.Now, outdoor heat exchanger 7, entirely as vaporizer, is arranged from compressor
The coolant going out fully enters and is heated in indoor heat exchanger so that indoor heat exchanger is in the state that efficiently heats.
More preferably, also comprise the steps:
At the end of outdoor heat exchanger defrost, controller controls the 4th electronics of the first electronic valve and described valving
Valve is opened, and the second electronic valve of described valving and the 3rd electronic valve are closed so that the 4th valve of the first cross valve
Mouth connects first flow path and second flow path simultaneously.Whether the defrost of controller real-time detection outdoor heat exchanger terminates, if outdoor is changed
Hot device defrost terminates, and outdoor heat exchanger 7 fully enters indoor heat exchanger entirely as vaporizer, the coolant discharged from compressor
Heated so that indoor heat exchanger is in the state that efficiently heats.If outdoor heat exchanger defrost does not terminate, controller controls
Continue to carry out defrost to outdoor heat exchanger.
As shown in figure 8, the invention still further relates to a kind of control method of air conditioning system, for the air-conditioning system of above-described embodiment two
Persistently heating of system, comprises the steps:
When outdoor heat exchanger enters defrost pattern, controller controls the first electronic valve to cut out, and the 5th of valving the
Electronic valve is opened, the second cross valve of described valving first valve port connect described second cross valve the second valve port or
4th valve port of described second cross valve is so that the first valve port of the first cross valve connects second flow path or first flow path.
The need of carrying out defrost, the Rule of judgment of defrost can be outdoor heat exchange to controller real-time detection outdoor heat exchanger
Temperature of the temperature of the discharge of device or outdoor environment etc..When outdoor heat exchanger needs defrost, the first valve of the first cross valve
Mouth connection second flow path or first flow path, high temperature refrigerant is directly entered in outdoor heat exchanger, improves speed and the effect of defrost.
When outdoor heat exchanger does not need to carry out defrost, controller controls the first electronic valve to open, the 5th electricity of described valving
Sub- valve closing, the first valve port of the second cross valve of described valving connects the second valve port or the institute of described second cross valve
State the 4th valve port of the second cross valve so that the 4th valve port of the first cross valve connects first flow path and second flow path simultaneously.
More preferably, also comprise the steps:
At the end of outdoor heat exchanger defrost, controller controls the first electronic valve to open, and the 5th of described valving the
Electronic valve close, the second cross valve of described valving first valve port connect described second cross valve the second valve port or
4th valve port of described second cross valve is so that the 4th valve port of the first cross valve connects first flow path and second flow path simultaneously.
Whether the defrost of controller real-time detection outdoor heat exchanger terminates, and at the end of outdoor heat exchanger defrost, outdoor is changed
Hot device 7 fully enters and is heated indoor heat exchanger so that interior is changed entirely as vaporizer, the coolant discharged from compressor
Hot device is in the state that efficiently heats.If outdoor heat exchanger defrost does not terminate, controller controls and continues outdoor heat exchanger is entered
Row defrost.
The air conditioning system of the present invention and its control method, when outdoor heat exchanger needs to carry out defrost, valving controls
The first flow path of the first valve port selectable connection outdoor heat exchanger of the first cross valve or second flow path, from the discharge of compressor
The coolant of High Temperature High Pressure two-way is divided into by the first cross valve, a road coolant get in heat exchanger heated so that
Hot blast is still had to blow out during air-conditioning defrost；Another road coolant is directly entered outdoor heat exchange by first flow path or second flow path
Device carries out defrost, improves defrost speed, enhances defrost effect；Then enter back into outdoor heat exchanger after the mixing of two-way coolant to steam
Send out and heat the heating effect it is ensured that air conditioning system；Finally, coolant returns to the air entry of compressor, completes once to heat circulation.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (8)
1. a kind of air conditioning system, including compressor, outdoor heat exchanger, throttling arrangement and indoor heat exchanger, described compressor, described
Indoor heat exchanger, described throttling arrangement and described outdoor heat exchanger be in turn connected to form closed circuit it is characterised in that:
Also include the first cross valve, described first cross valve is serially connected between described outdoor heat exchanger and described compressor, described
The air vent of compressor connects the first valve port of described first cross valve, and the second valve port of described first cross valve connects described room
Interior heat exchanger, the 3rd valve port of described first cross valve connects the air entry of described compressor after concatenating gas-liquid separator, described
4th valve port of the first cross valve connects described outdoor heat exchanger,
It is described that described outdoor heat exchanger is divided into first flow path and second flow path, described first flow path and described second flow path all to concatenate
Throttling arrangement connects to described indoor heat exchanger, is also serially connected with the first electronic valve between described first flow path and described second flow path
Door, described first flow path and described second flow path concatenate valving respectively and connect to described first cross valve so that described the
First valve port of one cross valve connects described first flow path or described second flow path, and high temperature refrigerant enters described first flow path, warp
Enter described second flow path after described throttling arrangement throttling, or high temperature refrigerant enters described second flow path, through described throttling arrangement
Described first flow path is entered after throttling；
Described outdoor heat exchanger includes diverter；The quantity of described diverter is two, the respectively first diverter and second point
Stream device;
Multiple isocons of multiple isocons of described first diverter and described second diverter are set in parallel in described outdoor
In the main body of heat exchanger, the arrangement side of multiple isocons of multiple isocons of described first diverter and described second diverter
Formula is that an isocon of an isocon of described first diverter and described second diverter is alternately arranged, and cycle arrangement exists
In the main body of described outdoor heat exchanger.
2. air conditioning system according to claim 1 it is characterised in that:
Described valving includes the second electronic valve, the 3rd electronic valve and the 4th electronic valve；
Described outdoor heat exchanger includes four ports, respectively first port, second port, the 3rd port and the 4th port, institute
State first port be connected with described second port formation described first flow path, described 3rd port is connected with described 4th port
The described second flow path of logical formation；Described first electronic valve is serially connected in described first port and the 4th valve of described first cross valve
Between mouthful；
Described second electronic valve is serially connected between described first port and the first valve port of described first cross valve, and the described 3rd
Electronic valve is serially connected between described 3rd port and the first valve port of described first cross valve, described 4th electronic valve concatenation
Between the 4th valve port of the 3rd port and described first cross valve.
3. air conditioning system according to claim 1 it is characterised in that:
Described valving includes the second cross valve and the 5th electronic valve；
Described outdoor heat exchanger includes four ports, respectively first port, second port, the 3rd port and the 4th port, institute
State first port be connected with described second port formation described first flow path, described 3rd port is connected with described 4th port
The described second flow path of logical formation；Described first electronic valve is serially connected between described first port and described 3rd port；
First valve port of described second cross valve concatenates described 5th electronic valve and connects to the first valve of described first cross valve
Mouthful, the second valve port of described second cross valve connects to described 3rd port；3rd valve port of described second cross valve connects institute
State the 4th valve port of the first cross valve, the 4th valve port of described second cross valve connects to described first port.
4. air conditioning system according to claim 1 it is characterised in that:
Described throttling arrangement includes first throttle device and second throttling device；
Described first flow path concatenates described first throttle device and connects to described indoor heat exchanger, described second concatenation described the
Two throttling arrangements connect to described indoor heat exchanger.
5. a kind of control method of air conditioning system, for persistently heating of the air conditioning system described in claim 2, its feature exists
In comprising the steps:
When outdoor heat exchanger enters defrost pattern, the second electronic valve of controller control valve door gear and the 4th electronic valve
Open, the 3rd electronic valve of the first electronic valve and described valving is closed so that the first valve port of the first cross valve connects
Logical first flow path；
Or the second electronic valve of controller control valve door gear and the 4th electronic valve are closed, the first electronic valve and described
3rd electronic valve of valving opens the first valve port connection second flow path so that the first cross valve.
6. the control method of air conditioning system according to claim 5 is it is characterised in that also comprise the steps:
At the end of outdoor heat exchanger defrost, controller controls the 4th electronic valve of the first electronic valve and described valving
Open, the second electronic valve of described valving and the closing of the 3rd electronic valve are so that the 4th valve port of the first cross valve is same
Shi Liantong first flow path and second flow path.
7. a kind of control method of air conditioning system, for persistently heating of the air conditioning system described in claim 3, walks including following
Rapid:
When outdoor heat exchanger enters defrost pattern, controller controls the first electronic valve to cut out, the 5th electronics of valving
Valve is opened, and the first valve port of the second cross valve of described valving connects second valve port or described of described second cross valve
4th valve port of the second cross valve is so that the first valve port of the first cross valve connects second flow path or first flow path.
8. the control method of air conditioning system according to claim 7 is it is characterised in that also comprise the steps:
At the end of outdoor heat exchanger defrost, controller controls the first electronic valve to open, the 5th electronics of described valving
Valve closing, the first valve port of the second cross valve of described valving connects second valve port or described of described second cross valve
4th valve port of the second cross valve is so that the 4th valve port of the first cross valve connects first flow path and second flow path simultaneously.
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| CN201410287199.0A CN104089427B (en) | 2014-06-24 | 2014-06-24 | Air conditioning system and control method thereof |
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| CN201410287199.0A CN104089427B (en) | 2014-06-24 | 2014-06-24 | Air conditioning system and control method thereof |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697240B (en) * | 2015-04-06 | 2017-01-18 | 林志辉 | High-stability multifunctional heat pump system |
| CN105627432A (en) * | 2015-12-25 | 2016-06-01 | 珠海格力电器股份有限公司 | Air conditioning system and defrosting control method thereof |
| CN106766331A (en) * | 2016-12-12 | 2017-05-31 | 广东美的暖通设备有限公司 | Non- reverse defrost multi-connected air conditioning system and air-conditioning |
| CN107023948B (en) * | 2017-04-01 | 2020-05-29 | 青岛海尔空调器有限总公司 | Air conditioner and non-stop defrosting operation method thereof |
| CN107023950B (en) * | 2017-04-01 | 2020-07-31 | 青岛海尔空调器有限总公司 | Defrosting operation method for air conditioner without stopping |
| CN106918122B (en) * | 2017-04-01 | 2020-05-29 | 青岛海尔空调器有限总公司 | Defrosting operation method for air conditioner without stopping |
| CN106871381B (en) * | 2017-04-01 | 2020-05-29 | 青岛海尔空调器有限总公司 | Defrosting operation method for air conditioner without stopping |
| CN107023946B (en) * | 2017-04-01 | 2020-05-29 | 青岛海尔空调器有限总公司 | Defrosting operation method for air conditioner without stopping |
| CN107388624A (en) * | 2017-07-19 | 2017-11-24 | 珠海格力电器股份有限公司 | Heat pump system and control method thereof |
| CN110617643B (en) * | 2018-07-08 | 2020-08-25 | 张宸浩 | Self-defrosting type energy-saving environment-friendly air conditioning unit |
| CN112050292B (en) * | 2020-08-24 | 2021-08-03 | 珠海格力电器股份有限公司 | Air conditioning system, and air conditioning system control method and device |
| CN113932506A (en) * | 2021-10-11 | 2022-01-14 | 青岛海尔空调器有限总公司 | Air conditioner |
| CN114198857B (en) * | 2021-11-17 | 2023-02-28 | 青岛海尔空调电子有限公司 | Air conditioner control method and air conditioner system |
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