CN106196694A - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
- Publication number
- CN106196694A CN106196694A CN201610544396.5A CN201610544396A CN106196694A CN 106196694 A CN106196694 A CN 106196694A CN 201610544396 A CN201610544396 A CN 201610544396A CN 106196694 A CN106196694 A CN 106196694A
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- Prior art keywords
- valve
- heat exchanger
- economizer
- valve port
- indoor heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of air conditioning system, including: compressor, the first cross valve, outdoor heat exchanger, indoor heat exchanger, first throttle device and economizer.First valve port of the first cross valve is connected with air vent, and the second valve port is connected with air entry；First port of outdoor heat exchanger and the 3rd valve port are connected；First end of indoor heat exchanger is connected with the second port of outdoor heat exchanger, and the second end of indoor heat exchanger and the 4th valve port are connected；First throttle device is located between outdoor heat exchanger and indoor heat exchanger；First opening of economizer selectively the first end with the 3rd valve port or indoor heat exchanger is connected, second opening of economizer is connected with the first end of air entry or indoor heat exchanger, 3rd opening of economizer is connected with the second end of indoor heat exchanger, and the 4th opening of economizer is connected with air entry.When air conditioning system according to embodiments of the present invention can solve Smaller load operation, compressor returns liquid, discharge superheat is not enough or pressure at expulsion crosses the problems such as height.
Description
Technical field
The present invention relates to refrigeration technology field, especially relate to a kind of air conditioning system.
Background technology
In correlation technique, for multi-online air-conditioning system, the state that Smaller load runs often occurs.The Smaller load of air-conditioning
Run situations such as being likely to result in time liquid of compressor, discharge superheat deficiency or pressure at expulsion rising.Long-term Smaller load fortune
Guild causes the infringement of compressor and affects the safety of system.The method solving Smaller load operation at present is usually at compressor
Gas exhaust piping bypass part of refrigerant unloads to low pressure line, handling capacity to balance internal-external machine exchanger capacity difference.But
This method is not enough to fundamentally solve Smaller load operation problem.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention carries
Going out a kind of air conditioning system, this air conditioning system is by arranging economizer, such that it is able to the system of High Temperature High Pressure will discharged from compressor
A part for cryogen and the part returning to the cold-producing medium before compressor from indoor heat exchanger carry out heat exchange, such that it is able to solve
When Smaller load runs, compressor returns liquid, discharge superheat is not enough or pressure at expulsion crosses the problems such as height.
Air conditioning system according to embodiments of the present invention, including: compressor, described compressor includes air entry and air vent；
First cross valve, described first cross valve includes first to fourth valve port, and described first valve port is connected with described air vent, described
Second valve port is connected with described air entry；Outdoor heat exchanger, the first port of described outdoor heat exchanger and described 3rd valve port phase
Even；Indoor heat exchanger, the first end of described indoor heat exchanger is connected with the second port of described outdoor heat exchanger, and described indoor are changed
Second end of hot device is connected with described 4th valve port；First throttle device, described first throttle device is located at described outdoor heat exchange
Between second port and first end of described indoor heat exchanger of device；Economizer, limiting in described economizer can heat exchange each other
The first refrigerant passage and second refrigerant path, described economizer has connected with described first refrigerant passage
One opening and the second opening, described economizer also has the 3rd opening and the 4th with described second refrigerant communication and opens
Mouthful, the first opening of described economizer selectively the first end with described 3rd valve port or described indoor heat exchanger is connected, institute
First end of the second opening and described air entry or described indoor heat exchanger of stating economizer is connected, and the 3rd of described economizer opens
Mouth is connected with the second end of described indoor heat exchanger, and the 4th opening of described economizer is connected with described air entry.
Air conditioning system according to embodiments of the present invention, by arranging above-mentioned economizer, such that it is able to will discharge from compressor
High Temperature High Pressure cold-producing medium a part with return to the part of the cold-producing medium before compressor from indoor heat exchanger and carry out heat friendship
Change, such that it is able to when solving Smaller load operation, compressor returns liquid, discharge superheat is not enough or pressure at expulsion crosses the problems such as height.
In some alternative embodiments, between the first opening and described 3rd valve port of described economizer, it is provided with the second throttling
Device, is provided with the first on-off valve between the first opening and first end of described indoor heat exchanger of described economizer.
In some alternative embodiments, set between the 3rd opening and second end of described indoor heat exchanger of described economizer
There are the second on-off valve or the 3rd throttling arrangement.
In some alternative embodiments, it is provided with from institute between described 4th valve port and the second end of described indoor heat exchanger
State the 4th valve port first check valve of one-way conduction on the direction of the second end of described indoor heat exchanger.
In some alternative embodiments, described air conditioning system also includes being located at described first throttle device and described indoor are changed
The second cross valve between first end of hot device, described second cross valve has the 5th to the 7th valve port, described 5th valve port with
Described first throttle device be connected, described 6th valve port is connected with the first end of described indoor heat exchanger, described 7th valve port and
First opening of described economizer is connected.
In some alternative embodiments, the second opening of described economizer is connected with the first end of described indoor heat exchanger,
And it is additionally provided with the 3rd on-off valve between the second opening and first end of described indoor heat exchanger of described economizer.
In some alternative embodiments, the second opening of described economizer selectively with described air entry or described indoor
First end of heat exchanger is connected, and described air conditioning system also includes that the 3rd cross valve, described 3rd cross valve have the 8th to the tenth
Valve port, described 8th valve port is connected with the second opening of described economizer, the of described 9th valve port and described indoor heat exchanger
One end is connected, and described tenth valve port is connected with described air entry.
In some alternative embodiments, the 3rd opening of described economizer is also by the 4th on-off valve and described 6th valve port
It is connected.
In some alternative embodiments, set between the 3rd opening and second end of described indoor heat exchanger of described economizer
Have and be intended for cold-producing medium unidirectional to the second of the direction one-way conduction of described 3rd opening from the second end of described indoor heat exchanger
Valve.
In some alternative embodiments, between described 4th valve port and the second end of described indoor heat exchanger, it is provided with five-way
Disconnected valve.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 is the schematic diagram of air conditioning system according to an embodiment of the invention；
Fig. 2 is the schematic diagram of air conditioning system in accordance with another embodiment of the present invention；
Fig. 3 is the schematic diagram of the air conditioning system according to third embodiment of the invention；
Fig. 4 is the schematic diagram of the air conditioning system according to four embodiment of the invention.
Reference:
Air conditioning system 100；
Compressor 1；Air entry 11；Air vent 12；
First cross valve 2；First valve port 21；Second valve port 22；3rd valve port 23；4th valve port 24；
Outdoor heat exchanger 3；First port 31；Second port 32；
First stop valve 41；Second stop valve 42；
First throttle device 51；Second throttling arrangement 52；3rd throttling arrangement 53；
Economizer 6；First opening 61；Second opening 62；3rd opening 63；4th opening 64；
First on-off valve 71；Second on-off valve 72；3rd on-off valve 73；4th on-off valve 74；5th on-off valve 75；
First check valve 81；Second check valve 82；
Second cross valve 9；5th valve port 91；6th valve port 92；7th valve port 93；
3rd cross valve 10；8th valve port 101；9th valve port 102；Tenth valve port 103；
Gas-liquid separator 20.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include one or more this feature.In describing the invention,
" multiple " are meant that two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, permissible
Understand above-mentioned term concrete meaning in the present invention as the case may be.
Below with reference to Fig. 1-Fig. 4, air conditioning system 100 according to embodiments of the present invention is described.
As Figure 1-Figure 4, air conditioning system 100 according to embodiments of the present invention, including: compressor the 1, first cross valve 2,
Outdoor heat exchanger 3, indoor heat exchanger, first throttle device 51 and economizer 6.
Compressor 1 has air entry 11 and air vent 12, and the air entry 11 of compressor 1 is for air-breathing, and cold-producing medium is by inhaling
QI KOU 11 is compressed in entering into the compression chamber of compressor 1, and the pressure of cold-producing medium is increased, and the refrigerant gas of high pressure is again
Discharge compressor 1 from the air vent 12 of compressor 1, and then carry out the circulation of cold-producing medium in entering into air conditioning system 100.
First cross valve 2 has four valve ports, and four valve ports of the first cross valve 2 are first valve port the 21, second valve respectively
Mouthful the 22, the 3rd valve port 23 and the 4th valve port 24, wherein the first cross valve 2 has and powers on and power-off two states, when the first four-way
When valve 2 is in power-up state, the first valve port 21 connects with the 4th valve port 24, the second valve port 22 connects with the 3rd valve port 23；When
When one cross valve 2 is in off-position, the first valve port 21 connects with the 3rd valve port 23, the second valve port 22 and the 4th valve port 24 even
Logical.
Outdoor heat exchanger 3 has the first port 31 and the second port 32, and wherein, the first port 31 is as outdoor heat exchanger 3
Import time, the second port 32 is then the outlet of outdoor heat exchanger 3, otherwise the first port 31 is as the outlet of outdoor heat exchanger 3
Time, the second port 32 is then the import of outdoor heat exchanger 3.
Indoor heat exchanger concrete structure in embodiments of the present invention does not limits, indoor heat exchanger can be simply connected machine also
It can be multi-connected machine.Wherein when indoor heat exchanger is multi-connected machine, the first end of indoor heat exchanger and the second end all can be as rooms
The general import of interior heat exchanger and general export.
First valve port 21 is connected with air vent 12, and the second valve port 22 is connected with air entry 11, the first end of outdoor heat exchanger 3
Mouth 31 is connected with the 3rd valve port 23, and the first end of indoor heat exchanger is connected with the second port 32 of outdoor heat exchanger 3, indoor heat exchange
Second end and the 4th valve port 24 of device are connected.
Wherein, first throttle device 51 be located at the second port 32 of outdoor heat exchanger 3 and indoor heat exchanger the first end it
Between.
Limit in economizer 6 can the first refrigerant passage of heat exchange and second refrigerant path each other, economizer 6 has
There is the first opening 61 and the second opening 62 connected with the first refrigerant passage, economizer 6 also has and leads to second refrigerant
Road connection the 3rd opening 63 and the 4th opening 64, the first opening 61 of economizer 6 selectively with the 3rd valve port 23 or indoor
First end of heat exchanger is connected, and the second opening 62 of economizer 6 is connected with the first end of air entry 11 or indoor heat exchanger, economical
3rd opening 63 of device 6 is connected with the second end of indoor heat exchanger, and the 4th opening 64 of economizer 6 is connected with air entry 11.
Air conditioning system 100 according to embodiments of the present invention, by arranging above-mentioned economizer 6, such that it is able to will be from compressor 1
A part for the cold-producing medium of the High Temperature High Pressure discharged is carried out with the part returning to the cold-producing medium before compressor 1 from indoor heat exchanger
Heat exchange, such that it is able to solve 1 time liquid of compressor when Smaller load runs, discharge superheat is not enough or pressure at expulsion is the most high asks
Topic.Wherein control mode and the refrigerant flow path of air conditioning system 100 in different embodiments will be carried out in following description in detail
Thin description.
By seeing each accompanying drawing respectively, the principle of air conditioning system 100 and the traffic organising of cold-producing medium are carried out specifically below
Bright.
Following disclosure provides many different embodiments or example for realizing the different structure of the present invention.For letter
Changing disclosure of the invention, hereinafter parts and setting to specific examples are described.Certainly, they are the most merely illustrative, and
It is not intended to limit the present invention.Additionally, the present invention can in different examples repeat reference numerals and/or reference letter, this
Plant and repeat to be for purposes of simplicity and clarity, the relation between itself not indicating discussed various embodiment and/or arranging.
Embodiment as shown in Figure 1, air conditioning system 100 includes: compressor the 1, first cross valve 2, outdoor heat exchanger 3, room
Interior heat exchanger, first throttle device 51 and economizer 6.
Compressor 1 has air entry 11 and air vent 12, and outdoor heat exchanger 3 has the first port 31 and the second port 32,
Indoor heat exchanger has the first end and the second end, and the first end of indoor heat exchanger is connected with the second port 32 of outdoor heat exchanger 3,
First throttle device 51 is located between the second port 32 and first end of indoor heat exchanger of outdoor heat exchanger 3, the first cross valve 2
Having four valve ports, four valve ports of the first cross valve 2 are first valve port the 21, second valve port 22, the 3rd valve port 23 and respectively
Four valve ports 24, the first valve port 21 is connected with air vent 12, and the second valve port 22 is connected with air entry 11, the first of outdoor heat exchanger 3
Port 31 is connected with the 3rd valve port 23, and the second end and the 4th valve port 24 of indoor heat exchanger are connected.
The end of indoor heat exchanger is provided with the first stop valve 41, is provided with the second cut-off at the second end of indoor heat exchanger
Valve 42.Thus, by arranging stop valve, such that it is able to facilitate maintenance and the maintenance of system.Specifically, it is assumed that indoor heat exchanger
When needing to repair or replace, the first stop valve 41 and the second stop valve 42 can be closed, such that it is able to indoor heat exchange
Device carries out convenient maintenance, it is not necessary to discharged by the cold-producing medium of whole system.
Additionally, be provided with the second throttling arrangement 52 between the first opening 61 and the 3rd valve port 23 of economizer 6, the second throttling dress
Put one end of 52 to be connected between the 3rd valve port 23 and the first end of outdoor heat exchanger 3, the other end of the second throttling arrangement 52 with
First opening 61 of described economizer 6 is connected.
The first on-off valve 71, specifically, it is provided with between first opening 61 and first end of indoor heat exchanger of economizer 6
One end of one on-off valve 71 is connected between first throttle device 51 and the first opening 61, and first on-off valve 71 other end is connected to
Between first throttle device 51 and the first end of indoor heat exchanger.Wherein the first on-off valve 71 has conducting and blocks two shapes
State, when it is in the conduction state, cold-producing medium can be by the pipeline at the first on-off valve 71 place, when it is in the state of blocking
Time, cold-producing medium cannot be by the pipeline at the first on-off valve 71 place.
The second on-off valve 72 it is provided with between 3rd opening 63 and second end of indoor heat exchanger of economizer 6, specifically,
One end of second on-off valve 72 is connected with the 3rd opening 63 of economizer 6, and the other end of the second on-off valve 72 is connected to the 4th valve
Between mouth 24 and the second end of indoor heat exchanger.Wherein the second on-off valve 72 has conducting and blocks two states, when it is in
During conducting state, cold-producing medium can be by the pipeline at the second on-off valve 72 place, and when it is in and blocks state, cold-producing medium cannot
Pipeline by the second on-off valve 72 place.
Further, it is provided with between the 4th valve port 24 and the second end of indoor heat exchanger and is changing to indoor from the 4th valve port 24
First check valve 81 of one-way conduction on the direction of the second end of hot device.
Preferably, it is additionally provided with gas-liquid separator 20 at the air entry 11 of compressor 1.By arranging gas-liquid separator 20, from
And the cold-producing medium entering into compressor 1 can be carried out gas liquid separating function, it is to avoid compressor 1 is produced liquid hammer problem, thus
Play the effect of protection compressor 1.
Referring now to the specific embodiment shown in Fig. 1, the control method of the air conditioning system 100 according to this embodiment is described
With corresponding refrigerant flow direction.
Air conditioning system 100 as shown in Figure 1, has Smaller load refrigeration and Smaller load heating mode.Wherein need explanation
Be, Smaller load refrigeration and Smaller load heat be all for indoor heat exchanger for, when indoor heat exchanger is to indoor environment system
Time cold, and when part operation another part of indoor heat exchanger does not runs, this air conditioning system 100 is in Smaller load refrigeration mould
Formula；In like manner, when indoor environment is heated by indoor heat exchanger, and a part for indoor heat exchanger runs another part not
During operation, this air conditioning system 100 is in Smaller load heating mode.
As it is shown in figure 1, when refrigeration system is in Smaller load refrigeration mode: control the first valve port 21 and the 3rd valve port 23 connects
Logical, control first throttle device the 51, second throttling arrangement 52 and the second on-off valve 72 is opened, control the first on-off valve 71 and close.
Refrigerant flow direction: be divided into two-way after the high-temperature high-pressure refrigerant of compressor 1 discharge is by the first cross valve 2, one
Road flows to indoor heat exchanger through outdoor heat exchanger 3, first throttle device 51, flows out from the second stop valve 42, through second after evaporation
On-off valve 72 flows to the second refrigerant path of economizer 6, then returns to compressor 1 through gas-liquid separator 20；Another Lu Jing
Two throttling arrangements 52 flow to the first refrigerant passage of economizer 6, then return to compressor 1 through gas-liquid separator 20.
It is to say, air conditioning system 100 is when carrying out Smaller load refrigeration mode, the High Temperature High Pressure system discharged from compressor 1
Cryogen bypassed a part to economizer 6, the low-temperature low-pressure refrigerant flowed back to from indoor heat exchanger before flowing to outdoor heat exchanger 3
First passing through economizer 6 before returning to compressor 1, this two parts cold-producing medium is abundant heat-shift in economizer 6 so that indoor
The cold-producing medium evaporated the most completely in heat exchanger continues evaporation in economizer 6, prevents 1 time liquid of compressor.
As it is shown in figure 1, when refrigeration system is in Smaller load heating mode: control the first valve port 21 and the 4th valve port 24 connects
Logical, the second valve port 22 connects with the 3rd valve port 23, controls the second on-off valve the 72, first on-off valve 71 and 51 dozens, first throttle device
Open, control the second throttling arrangement 52 and close.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to first unidirectional
Being divided into two-way after valve 81, road second on-off valve 72 flows to the second refrigerant path of economizer 6, then through gas-liquid separator
20 return to compressor 1；Another road second stop valve 42 flows to indoor heat exchanger, after evaporation after the first stop valve 41 flows out again
Being divided into two-way, road first on-off valve 71 flows to the first refrigerant passage of economizer 6, then returns to through gas-liquid separator 20
Compressor 1, another road is through first throttle device 51, outdoor heat exchanger 3 and the first cross valve 2, then through gas-liquid separator 20 times
To compressor 1.
It is to say, from the high-temperature high-pressure refrigerant of compressor 1 discharge in a bypass part before indoor heat exchanger
To economizer 6, the low-temperature refrigerant bypass before entering outdoor heat exchanger 3 flowed back to from indoor heat exchanger is a part of to economizer
6.This two parts cold-producing medium is abundant heat-shift, the heat that uninstalling system is unnecessary in economizer 6.
Embodiment as shown in Figure 1, by arranging economizer 6 in air conditioning system 100, can fundamentally solve air-conditioning system
When 100 Smaller load of uniting run, the compressor 1 being likely to result in return liquid, discharge superheat is not enough or the feelings such as pressure at expulsion rising
Condition, such that it is able to compressor 1 is played the effect of being effectively protected,
Embodiment as shown in Figure 2, unlike the embodiment shown in Fig. 1:
Air conditioning system 100 in Fig. 2 utilizes the second cross valve 9 to replace the first on-off valve 71, specifically, the second cross valve 9
Being located between first throttle device 51 and the first end of indoor heat exchanger, the second cross valve 9 has the 5th valve port the 91, the 6th valve port
92 and the 7th valve port 93, the 5th valve port 91 is connected with first throttle device 51, the first end of the 6th valve port 92 and indoor heat exchanger
(the first stop valve 41) is connected, and the 7th valve port 93 is connected with the first opening 61 of economizer 6.By utilizing the second cross valve 9 to replace
Changing the first on-off valve 71, such that it is able to make the connection of pipeline convenient, and the connecting leg of air conditioning system 100 is succinct.Need
Bright, the 4th valve port of the second cross valve 9 is carried out truncation.
Air conditioning system 100 in Fig. 2 also utilizes the 3rd throttling arrangement 53 to replace the of the second on-off valve 72, i.e. economizer 6
The 3rd throttling arrangement 53 is set between three openings 63 and the second end of indoor heat exchanger.
In addition the second opening 62 of economizer 6 is connected with first end (the first stop valve 41) of indoor heat exchanger, and economical
It is additionally provided with the 3rd on-off valve 73 between second opening 62 and first end of indoor heat exchanger of device 6.
Air conditioning system 100 as shown in Figure 2, has Smaller load refrigeration and Smaller load heating mode.
As in figure 2 it is shown, when refrigeration system is in Smaller load refrigeration mode: control the first valve port 21 and the 3rd valve port 23 connects
Logical, the 5th valve port 91 connects with the 6th valve port 92, controls first throttle device the 51, second throttling arrangement the 52, the 3rd throttling arrangement
53 and the 3rd on-off valve 73 open.
Refrigerant flow direction: be divided into two-way after the high-temperature high-pressure refrigerant of compressor 1 discharge is by the first cross valve 2, one
Road flows to the first stop valve 41 through outdoor heat exchanger 3, first throttle device 51 and the second cross valve 9；Another road second throttles
Device 52 flows to the first refrigerant passage of economizer 6, then flows to the first stop valve 41 through the 3rd on-off valve 73, and two-way converges
To indoor heat exchanger, flow out from the second stop valve 42 after evaporation, then flow to the second system of economizer 6 through the 3rd throttling arrangement 53
Cryogen path, then return to compressor 1 through gas-liquid separator 20.
It is to say, air conditioning system 100 as shown in Figure 2 is when carrying out Smaller load refrigeration mode, discharge from compressor 1
High-temperature high-pressure refrigerant bypassed a part to economizer 6, the low temperature flowed back to from indoor heat exchanger before flowing to outdoor heat exchanger 3
Low pressure refrigerant first passed through economizer 6 before returning to compressor 1, and this two parts cold-producing medium is abundant exchanged heat in economizer 6
Amount so that the cold-producing medium evaporated the most completely in indoor heat exchanger continues evaporation in economizer 6, prevents 1 time liquid of compressor.
As in figure 2 it is shown, when refrigeration system is in Smaller load heating mode: control the first valve port 21 and the 4th valve port 24 connects
Logical, the second valve port 22 connects with the 3rd valve port 23, controls the 5th valve port 91 and connects with the 6th valve port 92, controls first throttle device
51, the second throttling arrangement the 52, the 3rd throttling arrangement 53 and the 3rd on-off valve 73 are opened.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to first unidirectional
Being divided into two-way after valve 81, road the 3rd throttling arrangement 53 flows to the second refrigerant path of economizer 6, then through gas-liquid separation
Device 20 returns to compressor 1；Another road second stop valve 42 flows to indoor heat exchanger, after evaporation after the first stop valve 41 flows out
Being separated into two-way, road the 3rd on-off valve 73 flows to the first refrigerant passage of economizer 6, then flows through the second throttling arrangement 52
To the first cross valve 2, another road second cross valve 9, first throttle device 51, outdoor heat exchanger 3 flow to the first cross valve 2,
Two-way returns to compressor 1 through gas-liquid separator 20 after converging again.
It is to say, from the high-temperature high-pressure refrigerant of compressor 1 discharge in a bypass part before indoor heat exchanger
To economizer 6, the low-temperature refrigerant bypass before entering outdoor heat exchanger 3 flowed back to from indoor heat exchanger is a part of to economizer
6.This two parts cold-producing medium is abundant heat-shift in economizer 6, unloading indoor heat exchanger and the partial capability of indoor heat exchanger,
Balance cylinder's internal-external heat exchanger device cold-producing medium and the heat exchange of air side.
Embodiment as shown in Figure 2, by arranging economizer 6 in air conditioning system 100, can fundamentally solve air-conditioning system
When 100 Smaller load of uniting run, the compressor 1 being likely to result in return liquid, discharge superheat is not enough or the feelings such as pressure at expulsion rising
Condition, such that it is able to play, to compressor 1, the effect of being effectively protected.
Below with reference to Fig. 3, the air conditioning system 100 according to third embodiment of the invention is described.Air-conditioning system as shown in Figure 3
System 100, unlike the embodiment shown in Fig. 2:
3rd opening 63 of economizer 6 is connected with the 6th valve port 92 also by the 4th on-off valve 74.As it is shown on figure 3, the 4th
One end of on-off valve 74 is connected with one end away from the 3rd opening 63 of the 3rd throttling arrangement 53, the other end of the 4th on-off valve 74
It is connected between the 6th valve port 92 and the 3rd on-off valve 73.
Additionally, with unlike the example shown in Fig. 2, the first check valve 81 is cancelled, and opens at the 3rd of economizer 6
Be provided with between mouthfuls 63 and the second end of indoor heat exchanger be intended for cold-producing medium from the second end of indoor heat exchanger to the 3rd opening 63
The second check valve 82 of direction one-way conduction.
Air conditioning system 100 as shown in Figure 3, have normally freeze, normally heat, supercool, Smaller load refrigeration of freezing and little
Load heating mode.Control method and the flow direction of cold-producing medium of these several mode of operations it is respectively described below with reference to Fig. 3.
When air conditioning system 100 is in normal refrigerating mode: control the first valve port 21 connect with the 3rd valve port 23, the second valve
Mouthfuls 22 connect with the 4th valve port 24, the 5th valve port 91 connects with the 6th valve port 92, controls first throttle device 51 and opens, and controls the
Two throttling arrangement the 52, the 3rd throttling arrangement the 53, the 3rd on-off valves 73 and the 4th on-off valve 74 are closed.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to outdoor heat exchange
Device 3, flows to indoor heat exchanger, from the second stop valve 42 after evaporation by the second cross valve 9 after first throttle device 51 throttles
The cold-producing medium flowed out returns to compressor 1 through the first cross valve 2 and gas-liquid separator 20 again.
When air conditioning system 100 is in normal heating mode: control the first valve port 21 connect with the 4th valve port 24, the second valve
Mouthfuls 22 connect with the 3rd valve port 23, the 5th valve port 91 connects with the 6th valve port 92, controls first throttle device 51 and opens, and controls the
Two throttling arrangement the 52, the 3rd throttling arrangement the 53, the 3rd on-off valves 73 and the 4th on-off valve 74 are closed.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to indoor heat exchange
Device, the cold-producing medium flowed out from the first stop valve 41 after condensation flows to first throttle device 51 through the second cross valve 9, flows to after throttling
Indoor heat exchanger, then return to compressor 1 through the first cross valve 2 and gas-liquid separator 20.
When air conditioning system 100 be in refrigeration supercool pattern time: control the first valve port 21 connect with the 3rd valve port 23, the second valve
Mouth 22 connects with the 4th valve port 24, the 5th valve port 91 connects with the 7th valve port 93, controls first throttle device the 51, the 3rd throttling dress
Put the 53, the 3rd on-off valve 73 and the 4th on-off valve 74 is opened, control the second throttling arrangement 52 and close.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to outdoor heat exchange
Device 3, flows to the first refrigerant passage of economizer 6 by the second cross valve 9 after first throttle device 51 throttles, and again passes through the
Being divided into two-way after three on-off valves 73, road the 4th on-off valve the 74, the 3rd throttling arrangement 53 flows to the second refrigerant of economizer 6
Path, then return to compressor 1 through gas-liquid separator 20, another road flows to indoor heat exchanger, and after evaporation, cold-producing medium is through the second cut-off
Valve the 42, first cross valve 2 and gas-liquid separator 20 return to compressor 1.
Now, economizer 6 plays subcooler effect, thus can improve the cooling or heating effect of air conditioning system 100.
When refrigeration system is in Smaller load refrigeration mode: control the first valve port 21 connect with the 3rd valve port 23, the second valve
Mouth 22 connects with the 4th valve port 24, and the 5th valve port 91 connects with the 6th valve port 92, controls first throttle device the 51, second throttling dress
Put the 52, the 3rd throttling arrangement 53 and the 3rd on-off valve 73 is opened, controlled the 4th on-off valve 74 and close.
Refrigerant flow direction: be divided into two-way after the high-temperature high-pressure refrigerant of compressor 1 discharge is by the first cross valve 2, one
Road flows to the first stop valve 41 through outdoor heat exchanger 3, first throttle device 51 and the second cross valve 9；Another road second throttles
Device 52 flows to the first refrigerant passage of economizer 6, then flows to the first stop valve 41 through the 3rd on-off valve 73, and two-way converges
To indoor heat exchanger, being divided into two-way after evaporation after the second stop valve 42 flows out, a road throttles through the second check valve the 82, the 3rd
Device 53 flows to the second refrigerant path of economizer 6, then returns to compressor 1 through gas-liquid separator 20, another road the one or four
Logical valve 2 and gas-liquid separator 20 return to compressor 1.
As it is shown on figure 3, when refrigeration system is in Smaller load heating mode: control the first valve port 21 and the 4th valve port 24 connects
Logical, the second valve port 22 connects with the 3rd valve port 23, controls the 5th valve port 91 and connects with the 6th valve port 92, controls first throttle device
51, the second throttling arrangement the 52, the 3rd throttling arrangement 53 and the 3rd on-off valve 73 are opened, and control the 4th on-off valve 74 and close.
Refrigerant flow direction: be divided into two-way after the high-temperature high-pressure refrigerant of compressor 1 discharge is by the first cross valve 2, one
Road the second check valve the 82, the 3rd throttling arrangement 53 flows to the second refrigerant path of economizer 6, then through gas-liquid separator 20
Return to compressor 1；Another road second stop valve 42 flows to indoor heat exchanger, divides after evaporation after the first stop valve 41 flows out again
Becoming two-way, road the 3rd on-off valve 73 flows to the first refrigerant passage of economizer 6, then flows to the through the second throttling arrangement 52
One cross valve 2, another road second cross valve 9, first throttle device 51, outdoor heat exchanger 3 flow to the first cross valve 2, two-way
Compressor 1 is returned to through gas-liquid separator 20 again after converging.
Embodiment as shown in Figure 3, by arranging economizer 6 in air conditioning system 100, can fundamentally solve air-conditioning system
When 100 Smaller load of uniting run, the compressor 1 being likely to result in return liquid, discharge superheat is not enough or the feelings such as pressure at expulsion rising
Condition, such that it is able to play, to compressor 1, the effect of being effectively protected, additionally, the air conditioning system 100 of embodiment as shown in Figure 3 is gone back
Supercool pattern of freezing can be carried out, such that it is able to improve the cooling or heating effect of system.
Further below with reference to Fig. 4, the air conditioning system 100 according to four embodiment of the invention is described, as shown in Figure 4
Air conditioning system 100, is the 3rd on-off valve 73 is replaced to the 3rd cross valve 10, thus with the embodiment difference shown in Fig. 3
Second opening 62 of economizer 6 selectively the first end with air entry 11 or indoor heat exchanger is connected, and the 3rd cross valve 10 has
Having the 8th valve port the 101, the 9th valve port 102 and the tenth valve port 103, the 8th valve port 101 is connected with the second opening 62 of economizer 6,
9th valve port 102 is connected with the first end of indoor heat exchanger, and the tenth valve port 103 is connected with air entry 11.Wherein the 3rd cross valve
4th the valve port truncation of 10.
Additionally, in the embodiment shown in Fig. 4, be additionally provided with five-way between the 4th valve port 24 and the second end of indoor heat exchanger
Disconnected valve 75.
Air conditioning system 100 as shown in Figure 4, have normally freeze, normally heat, supercool, Smaller load refrigeration of freezing and little
Load heating mode.Control method and the flow direction of cold-producing medium of these several mode of operations it is respectively described below with reference to Fig. 4.
When air conditioning system 100 is in normal refrigerating mode: control the first valve port 21 connect with the 3rd valve port 23, the second valve
Mouth 22 connects with the 4th valve port 24, the 5th valve port 91 connects with the 6th valve port 92, controls first throttle device 51 and the 5th break-make
Valve 75 is opened, and controls the second throttling arrangement the 52, the 3rd throttling arrangement 53 and the 4th on-off valve 74 is closed, and controls the 3rd cross valve 10
Close.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to outdoor heat exchange
Device 3, flows to indoor heat exchanger, from the second stop valve 42 after evaporation by the second cross valve 9 after first throttle device 51 throttles
The cold-producing medium flowed out returns to compressor 1 through the 5th on-off valve the 75, first cross valve 2 and gas-liquid separator 20 again.
When air conditioning system 100 is in normal heating mode: control the first valve port 21 connect with the 4th valve port 24, the second valve
Mouth 22 connects with the 3rd valve port 23, the 5th valve port 91 connects with the 6th valve port 92, controls first throttle device 51 and the 5th break-make
Valve 75 is opened, and controls the second throttling arrangement the 52, the 3rd throttling arrangement 53 and the 4th on-off valve 74 is closed, and controls the 3rd cross valve 10
Close.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to indoor heat exchange
Device, the cold-producing medium flowed out from the first stop valve 41 after condensation flows to first throttle device 51 through the second cross valve 9, flows to after throttling
Indoor heat exchanger, then return to compressor 1 through the first cross valve 2 and gas-liquid separator 20.
When air conditioning system 100 be in refrigeration supercool pattern time: control the first valve port 21 connect with the 3rd valve port 23, the second valve
Mouth 22 connects with the 4th valve port 24, the 5th valve port 91 connects with the 7th valve port 93, the 8th valve port 101 connects with the 9th valve port 102,
Control first throttle device the 51, the 3rd throttling arrangement the 53, the 4th on-off valve 74 and the 5th on-off valve 75 is opened, control the second throttling
Device 52 is closed.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2, flows to outdoor heat exchange
Device 3, flows to the first refrigerant passage of economizer 6 by the second cross valve 9 after first throttle device 51 throttles, and again passes through the
Being divided into two-way after three cross valves 10, road the 4th on-off valve the 74, the 3rd throttling arrangement 53 flows to the second refrigerant of economizer 6
Path, then return to compressor 1 through gas-liquid separator 20, another road flows to indoor heat exchanger, and after evaporation, cold-producing medium is through the second cut-off
Valve the 42, the 5th on-off valve the 75, first cross valve 2 and gas-liquid separator 20 return to compressor 1.
Now, economizer 6 plays subcooler effect, thus can improve the cooling or heating effect of air conditioning system 100.
When refrigeration system is in Smaller load refrigeration mode: control the first valve port 21 connect with the 3rd valve port 23, the second valve
Mouth 22 connects with the 4th valve port 24, and the 5th valve port 91 connects with the 6th valve port 92, and the 8th valve port 101 connects with the 9th valve port 102,
Control first throttle device the 51, second throttling arrangement the 52, the 3rd throttling arrangement 53 to open, control the 4th on-off valve 74 and five-way
Disconnected valve 75 cuts out.
Refrigerant flow direction: be divided into two-way after the high-temperature high-pressure refrigerant of compressor 1 discharge is by the first cross valve 2, one
Road flows to the first stop valve 41 through outdoor heat exchanger 3, first throttle device 51 and the second cross valve 9；Another road second throttles
Device 52 flows to the first refrigerant passage of economizer 6, then flows to the first stop valve 41 through the 3rd cross valve 10, and two-way converges
To indoor heat exchanger, after evaporation after the second stop valve 42 flows out, flow to warp through the second check valve the 82, the 3rd throttling arrangement 53
The second refrigerant path of Ji device 6, then return to compressor 1 through gas-liquid separator 20.
As shown in Figure 4, when refrigeration system is in Smaller load heating mode: control the first valve port 21 and the 4th valve port 24 connects
Logical, the second valve port 22 connects with the 3rd valve port 23, controls the 5th valve port 91 and connects with the 6th valve port 92, controls the 8th valve port 101
Connect with the 9th valve port 102, control first throttle device the 51, second throttling arrangement the 52, the 3rd throttling arrangement 53 and five-way
Disconnected valve 75 is opened, and controls the 4th on-off valve 74 and closes.
Refrigerant flow direction: the high-temperature high-pressure refrigerant discharged from compressor 1 passes through the first cross valve 2 and the 5th on-off valve 75
After be divided into two-way, road the second check valve the 82, the 3rd throttling arrangement 53 flows to the second refrigerant path of economizer 6, then warp
Cross gas-liquid separator 20 and return to compressor 1；Another road second stop valve 42 flows to indoor heat exchanger, from the first cut-off after evaporation
Valve 41 is separated into two-way after flowing out, and road the 3rd cross valve 10 flows to the first refrigerant passage of economizer 6, then through second section
Stream device 52 flows to the first cross valve 2, and another road second cross valve 9, first throttle device 51, outdoor heat exchanger 3 flow to the
One cross valve 2, two-way returns to compressor 1 through gas-liquid separator 20 after converging again.
The present invention in addition, by arranging the 3rd cross valve 10, such that it is able to utilize the 3rd cross valve 10 can be to system
Cryogen carries out the effect of hot-gas bypass.The high temperature refrigerant such as discharged from compressor 1 is entering through the second throttling arrangement 52
After the second refrigerant path of economizer 6, the air entry 11 of compressor 1 can be returned directly to through the 3rd cross valve 10, thus reach
Effect to hot-gas bypass.
Embodiment as shown in Figure 4, by arranging economizer 6 in air conditioning system 100, can fundamentally solve air-conditioning system
When 100 Smaller load of uniting run, the compressor 1 being likely to result in return liquid, discharge superheat is not enough or the feelings such as pressure at expulsion rising
Condition, such that it is able to play, to compressor 1, the effect of being effectively protected, additionally, the air conditioning system 100 of embodiment as shown in Figure 4 is gone back
Supercool pattern of freezing can be carried out, such that it is able to improve the cooling or heating effect of system.
The control method of air conditioning system 100 according to embodiments of the present invention, can fundamentally solve air conditioning system 100 little
During load operation, the situations such as liquid, discharge superheat deficiency or pressure at expulsion rising of returning of the compressor 1 being likely to result in, thus
Compressor 1 can be played the effect of being effectively protected.
Wherein, in an embodiment of the present invention, it is to be understood that above-mentioned air conditioning system may apply to small-sized household
In air-conditioner, it is also possible to be applied in large-scale central air conditioner system.
In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " concrete example " or " some examples " etc. means to combine this embodiment or the specific features of example description, knot
Structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or spy
Point can combine in any one or more embodiments or example in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
These embodiments can be carried out multiple change in the case of departing from the principle of the present invention and objective, revise, replace and modification, this
The scope of invention is limited by claim and equivalent thereof.
Claims (10)
1. an air conditioning system, it is characterised in that including:
Compressor, described compressor includes air entry and air vent；
First cross valve, described first cross valve includes that first to fourth valve port, described first valve port are connected with described air vent,
Described second valve port is connected with described air entry；
Outdoor heat exchanger, the first port of described outdoor heat exchanger is connected with described 3rd valve port；
Indoor heat exchanger, the first end of described indoor heat exchanger is connected with the second port of described outdoor heat exchanger, described indoor
Second end of heat exchanger is connected with described 4th valve port；
First throttle device, described first throttle device is located at the second port of described outdoor heat exchanger and described indoor heat exchanger
The first end between；
Economizer, limit in described economizer can the first refrigerant passage of heat exchange and second refrigerant path each other, described
There is on economizer the first opening and the second opening connected with described first refrigerant passage, described economizer also has with
3rd opening of described second refrigerant communication and the 4th opening,
First opening of described economizer selectively the first end with described 3rd valve port or described indoor heat exchanger is connected, institute
First end of the second opening and described air entry or described indoor heat exchanger of stating economizer is connected, and the 3rd of described economizer opens
Mouth is connected with the second end of described indoor heat exchanger, and the 4th opening of described economizer is connected with described air entry.
Air conditioning system the most according to claim 1, it is characterised in that the first opening of described economizer and described 3rd valve
It is provided with the second throttling arrangement between Kou, between the first opening and first end of described indoor heat exchanger of described economizer, is provided with
One on-off valve.
Air conditioning system the most according to claim 1, it is characterised in that the 3rd opening of described economizer changes with described indoor
The second on-off valve or the 3rd throttling arrangement it is provided with between second end of hot device.
Air conditioning system the most according to claim 1, it is characterised in that the of described 4th valve port and described indoor heat exchanger
It is provided with between two ends single on the direction of the second end of described indoor heat exchanger the first of one-way conduction from described 4th valve port
To valve.
Air conditioning system the most according to claim 1, it is characterised in that also include being located at described first throttle device and described
The second cross valve between first end of indoor heat exchanger, described second cross valve has the 5th to the 7th valve port, and the described 5th
Valve port is connected with described first throttle device, and described 6th valve port is connected with the first end of described indoor heat exchanger, and the described 7th
Valve port is connected with the first opening of described economizer.
Air conditioning system the most according to claim 5, it is characterised in that the second opening of described economizer changes with described indoor
First end of hot device is connected, and is additionally provided with the 3rd between the second opening of described economizer and the first end of described indoor heat exchanger
On-off valve.
Air conditioning system the most according to claim 5, it is characterised in that the second opening of described economizer selectively with institute
The first end stating air entry or described indoor heat exchanger is connected, and described air conditioning system also includes the 3rd cross valve, and the described 3rd 4
Logical valve has the 8th to the tenth valve port, and described 8th valve port is connected with the second opening of described economizer, described 9th valve port with
First end of described indoor heat exchanger is connected, and described tenth valve port is connected with described air entry.
Air conditioning system the most according to claim 5, it is characterised in that the 3rd opening of described economizer is also by four-way
Disconnected valve is connected with described 6th valve port.
Air conditioning system the most according to claim 1, it is characterised in that the 3rd opening of described economizer changes with described indoor
Be provided with between second end of hot device be intended for cold-producing medium from the second end of described indoor heat exchanger to the direction of described 3rd opening
Second check valve of one-way conduction.
Air conditioning system the most according to claim 1, it is characterised in that described 4th valve port and described indoor heat exchanger
The 5th on-off valve it is provided with between second end.
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| CN201610544396.5A CN106196694B (en) | 2016-07-11 | 2016-07-11 | Air-conditioning system |
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