CN207945857U - Air-conditioning system - Google Patents
Air-conditioning system Download PDFInfo
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- CN207945857U CN207945857U CN201820245404.0U CN201820245404U CN207945857U CN 207945857 U CN207945857 U CN 207945857U CN 201820245404 U CN201820245404 U CN 201820245404U CN 207945857 U CN207945857 U CN 207945857U
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Abstract
This application provides a kind of air-conditioning system, which includes condenser, evaporator, compressor and throttling set.Condenser, evaporator, compressor and throttling set form the circulatory system；Air-conditioning system further includes bypass flow path, the exhaust outlet of one end connect compressor of bypass flow path, the import of the other end connection evaporator of bypass flow path, bypass flow path is used to open when air-conditioning system carries out ultra-low load running, carries out decompression to the refrigerant of compressor outflow and the refrigerant after decompression is led to evaporator.Using the technical solution of the utility model, so that it may to reduce the coolant quantity for participating in refrigeration by condenser, unload the sub-load of compressor so that compressor can meet the requirement of ultra-low load work when cold workload demand is low.
Description
Technical field
The utility model is related to air-conditioning technical fields, in particular to a kind of air-conditioning system.
Background technology
It is more than 8600 public affairs that, which there are 43 cities, the 100 a plurality of granted construction of subway line, planning total kilometrage in the first half of the year in 2017,
In, annual gross investment is more than 350,000,000,000 yuan.The year two thousand twenty is expected, 50 left sides will be increased by meeting the city of nation-building subway standard
The right side brings very huge and sustainable growth the market space for subway station air-conditioning equipment.
2018 beginning of the years, further perfect, the further promotion direct refrigeration-type air-conditioning of water cooling of Metro Air conditioner relevant criterion
The development of unit.But existing industry technology is still immature.
Such as a kind of water cooling direct-expansion type magnetic suspension unit is disclosed in patent document " CN205860275U ", by condenser
Supercooling refrigerant after heat absorption is introduced directly into compressor, be easy to cause air-breathing without the degree of superheat, causes absorbing gas belt liquid and cavitation, damage pressure
Contracting machine impeller；Complete machine because of compressor surge frequency limit, can not frequency reducing accomplish 30% and such as the following ultra-low load, in actual demand
When relatively low, which cannot be satisfied requirement.
Utility model content
The utility model embodiment provides a kind of air-conditioning system, to solve complete machine existing for air-conditioning system in the prior art
Because compressor surge frequency limit can not ultra-low load work the technical issues of.
The application embodiment provides a kind of air-conditioning system, including：Condenser, evaporator, compressor and throttling set,
Condenser, evaporator, compressor and throttling set form the circulatory system；Air-conditioning system further includes：Bypass flow path, bypass flow path
The exhaust outlet of one end connect compressor, the import of the other end connection evaporator of bypass flow path, bypass flow path are used in air-conditioning system
System opened when ultra-low load running, carries out decompression to the refrigerant of compressor outflow and the refrigerant after decompression is led to evaporation
Device.
In one embodiment, stream way control switch is provided in bypass flow path, stream way control switch is for controlling side
Through-flow road is turned on and off.
In one embodiment, pressure regulating part is additionally provided in bypass flow path, pressure regulating part setting is being flowed
The downstream of way control switch, pressure regulating part is for being depressured refrigerant.
In one embodiment, pressure regulating part is at least two capillaries in parallel.
In one embodiment, air-conditioning system includes liquid separation head assembly, and liquid separation head assembly is connected to the upstream of evaporator
Between pipeline and evaporator, liquid separation head assembly is used to divide equally refrigerant to every heat exchange coil of evaporator.
In one embodiment, multiple exits that liquid separation head assembly includes access port and is connected with access port, connect
The upstream of entrance and evaporator connects, and each exit is connect with each heat exchange coil of evaporator respectively.
In one embodiment, evaporator is multiple, corresponding, and liquid separation head assembly is also multiple, and air-conditioning system is also
Including liquid separation packet, liquid separation packet is connected between the upstream of evaporator and liquid separation head assembly, and liquid separation packet is for dividing equally refrigerant
To each liquid separation head assembly.
In one embodiment, air-conditioning system further includes collection gas bag, and collection gas bag is connected to the downstream tube of multiple evaporators
Between road and multiple evaporators, collection gas bag is used to collect the refrigerant in multiple evaporators, and refrigerant is conveyed to downstream pipe.
In one embodiment, air-conditioning system further includes cooling flowing path, cooling flowing path be arranged in the downstream of condenser and
Between the upstream of evaporator, cooling flowing path for the refrigerant that be flowed out in condenser to be drawn, and to the component to be cooled of process into
Row cooling, finally leads to evaporator by refrigerant.
In one embodiment, component to be cooled includes the motor of compressor and the bearing of compressor, cooling flowing path packet
The first cooling flowing path is included, the first cooling flowing path respectively drops the bearing of the motor of compressor and compressor by compressor
Temperature.
In one embodiment, component to be cooled further includes frequency conversion tank and electric cabinet, and cooling flowing path further includes second cold
But flow path, the second cooling flowing path is by frequency conversion tank and electric cabinet and cools down respectively to frequency conversion tank and electric cabinet.
In one embodiment, economizer is provided on the flow path where throttling set, air-conditioning system further includes supercooling
Flow path, supercooling flow path are connected between the downstream of economizer and the input terminal of compressor, and supercooling flow path is used to be depressured refrigerant, and
Cooled down to the refrigerant in the flow path where throttling set by economizer, is subcooled on flow path and is provided with dropping valve.
In one embodiment, condenser is Shell-tube Condenser and/or evaporator is direct-expansion type evaporator, and/or pressure
Contracting machine is magnetic suspension compressor.
In the above-described embodiments, when cold workload demand is normal, load down flow path is closed, refrigerant is normal through compressor
The mode of → condenser → throttling set → evaporator → compressor recycles；When cold workload demand is low, load down stream is opened
Road, the refrigerant partly flowed out from compressor flow into load down flow path, then lead to evaporator after being depressured by load down flow path.In this way
One, so that it may the coolant quantity to freeze be participated in by condenser to reduce, unload the sub-load of compressor so that compressor can be with
Meet the requirement of ultra-low load work when cold workload demand is low.
Description of the drawings
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model
Illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.In attached drawing
In：
Fig. 1 is the overall structure diagram of the embodiment of air-conditioning system according to the present utility model；
Fig. 2 and Fig. 3 is complete machine wind field motion pattern of the evaporator of air-conditioning system according to the present utility model in test.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, with reference to embodiment and attached
Figure, is described in further details the utility model.Here, the exemplary embodiment and its explanation of the utility model are for solving
The utility model is released, but is not intended to limit the scope of the present invention.
Fig. 1 shows the embodiment of the air-conditioning system of the utility model, which includes condenser 10, evaporator
20, compressor 30 and throttling set 40.Condenser 10, evaporator 20, compressor 30 and throttling set 40 form the circulatory system.It removes
Except this, air-conditioning system further includes bypass flow path a, and bypass flow path a is connected to the upstream in the downstream and evaporator 20 of compressor 30
Between.Bypass flow path a is used to open when air-conditioning system carries out ultra-low load running, and the refrigerant flowed out to compressor 30 drops
It presses and the refrigerant after decompression is led into evaporator 20.
Using the technical solution of the utility model, when cold workload demand is normal, bypass flow path a is closed, refrigerant is normal
It is recycled by way of 20 → compressor of compressor 30 → condenser, 10 → throttling set, 40 → evaporator 30；When cold load needs
When asking low, bypass flow path a is opened, the refrigerant partly flowed out from compressor 30 flows into bypass flow path a, then is dropped by bypass flow path a
Lead to evaporator 20 after pressure.So, so that it may to reduce the coolant quantity for participating in refrigeration by condenser 10, unload compressor 30
Sub-load so that compressor 30 can meet when cold workload demand is low ultra-low load work requirement.
As a preferred embodiment, as shown in Figure 1, being provided with stream way control switch a1 on bypass flow path a.Make
Used time controls being turned on and off for bypass flow path a by flowing way control switch a1.Preferably, stream way control switch a1 is bypass
Solenoid valve.More preferably, pressure regulating part a2 is additionally provided on bypass flow path a, pressure regulating part a2 is arranged in flow path
Control the downstream of switch a1.When in use, pressure regulating part a2 is for being depressured refrigerant.Preferably, pressure regulating part
Part a2 is the multiple capillaries being connected in parallel.
Specifically, in 25%~120% cold workload demand, stream way control switch a1 is closed, this bypass flow path a is not
It enables.In 5%~25% cold workload demand (ultra-low load i.e. described in the utility model), way control switch a1 is flowed
It opens, the cold medium flux of this bypass flow path a occupies the 20% of complete machine circular flow.
When in use, coordination control is mainly carried out in terms of two,
When 1 30% or less underload of operation, since surge frequency limit can no longer meet minimum load demand, then open
Dynamic bypass flow path a, to further decrease 30 surge frequency of compressor so that compressor 30 being capable of further frequency reducing；
The enabling of 2 judgement bypass flow path a, can pass through the pressure ratio of pressure at expulsion P1 and pressure of inspiration(Pi) P2.
Y=-Ax2+Bx-C–D
X=P1 ÷ P2
Y --- surge frequency
The pressure ratio of X --- pressure at expulsion and pressure of inspiration(Pi)
P1 --- back pressure transducer measured value
P2 --- inspiratory pressure sensor measured value
A/B/C --- magnetic suspension compressor surge correction factor and constant
D --- surge line bypass corrects D ＞ 0 when constant bypass is opened, D=0 when closing
As shown in Figure 1, the air-conditioning system of the utility model includes liquid separation head assembly 50, liquid separation head assembly 50 is connected to evaporation
Between the upstream and evaporator 20 of device 20.When in use, liquid separation head assembly 50 divides equally refrigerant to every of evaporator 20
Heat exchange coil.So, so that it may to allow every heat exchange coil of evaporator 20 all to assign to refrigerant, and then be more uniformly distributed
Heat exchange.As an alternative embodiment, liquid separation head assembly 50 includes access port and what is be connected with access port multiple connect
Outlet, access port are connect with the upstream of evaporator 20, and each exit connects with each heat exchange coil of evaporator 20 respectively
It connects.
As a kind of more preferably embodiment, as shown in Figure 1, evaporator 20 is multiple, corresponding, liquid-dividing head group
Part 50 is also multiple.Air-conditioning system further includes liquid separation packet 60, and liquid separation packet 60 is connected to the upstream and liquid-dividing head of evaporator 20
Between component 50.When in use, refrigerant is given each liquid separation head assembly 50 by liquid separation packet 60.Refrigerant is divided equally by liquid separation packet 60
To each liquid separation head assembly 50, then every heat exchange coil allowing liquid separation head assembly 50 that refrigerant is given to evaporator 20, it is ensured that
The heat exchange that every heat exchange coil of each evaporator 20 is assigned to refrigerant, and then is more uniformly distributed.As a kind of more excellent
The embodiment of choosing, air-conditioning system further include collection gas bag 70, and collection gas bag 70 is connected to the downstream pipe of multiple evaporators 20 and more
Between a evaporator 20.When in use, collection gas bag 70 collects the refrigerant in multiple evaporators 20, and refrigerant is conveyed to downstream tube
Road.
Specifically, in the technical solution of the present embodiment, evaporator 20 is parallel four points of finned heat exchangers；Refrigerant is by dividing
Liquid packet 60 is divided into four tunnels, per each heat exchange coil is evenly distributed to through liquid separation head assembly 50 again all the way, is steamed by heat absorption
After hair, it is aggregated into collection gas bag 70, every all the way, every a piece of refrigerant being capable of mean allocation with guarantee.Simultaneously wind side is solved in order to coordinate
Heat exchange uniformity, the big flow monoblock type wind turbine that system does not use, and use distributed fan wall, matrix can be used in fan wall
It is uniform to meet evaporator surface air-supply for arrangement.
Optionally, in the technical solution of the utility model, condenser 10 is Shell-tube Condenser, and evaporator 20 is direct-expansion type
Evaporator, compressor 30 are magnetic suspension compressor.It can to the simulated effect of the wind field streamline of direct-expansion type evaporator from Fig. 2 and Fig. 3
It to find out, is more uniformly distributed than the temperature field of conventional system using four liquid separation technologies+distribution air-supply technology, wind-velocity streamline is more flat
Surely, the uneven problem of large area fin refrigerant heat exchange has been well solved.
In the technical solution of the utility model, air-conditioning system further includes cooling flowing path, and cooling flowing path is arranged in condenser
Between 10 downstream and the upstream of evaporator 20.Cooling flowing path is used to draw the refrigerant flowed out in condenser 10, and to passing through
Component to be cooled cool down, refrigerant is finally led into evaporator 20.Compressor electric motor and axis are defined in the prior art
Cooling system and flow path are held, and to the adjusting control of frequency converter cooling, but does not account for these small flow path coolant systems pair
Small flow path refrigerant is directly introduced directly into compressor air suction mouth by the influence of complete machine, this undoubtedly leads to the problem of absorbing gas belt liquid.This
Scheme is arranged by cooling flowing path between the downstream of condenser 10 and the upstream of evaporator 20, to reduce the wind of absorbing gas belt liquid
Danger, while evaporating temperature is improved, further widen underrun.Optionally, as shown in Figure 1, component to be cooled includes compression
The motor 31 of machine 30 and the bearing 32 of compressor 30.Preferably, cooling flowing path includes the first cooling flowing path b1, the first cooling flowing path
B1 respectively cools down to the bearing 32 of the motor 31 of compressor 30 and compressor 30 by compressor 30.Optionally, to be cooled
Component further includes frequency conversion tank 81 and electric cabinet 82.More preferably, cooling flowing path further includes the second cooling flowing path b2, the second cooling
Flow path b2 is by frequency conversion tank 81 and electric cabinet 82 and cools down respectively to frequency conversion tank 81 and electric cabinet 82.Using the utility model
Technical solution, be arranged between the downstream of condenser 10 and the upstream of evaporator 20 by cooling flowing path, to reduce absorbing gas belt
The risk of liquid, while evaporating temperature is improved, underrun is further widened, can be very good to solve compressor cooling or frequency conversion
Device cooling introduces the problem of air entry leads to band liquid.Optionally, frequency conversion tank 81 is frequency-variable evaporation cabinet.
As shown in Figure 1, in the technical solution of the utility model, economizer is provided on the flow path where throttling set 40
C1, air-conditioning system further include supercooling flow path c, supercooling flow path c be connected to economizer c1 downstream and compressor 30 input terminal it
Between.When in use, supercooling flow path c is depressured refrigerant, and is cooled down to the refrigerant in major cycle flow path by economizer c1.Passed through
Cold flow road c and economizer c1 can improve the degree of supercooling of the refrigerant in the flow path where throttling set, and then promote refrigeration effect
Fruit.Optionally, it is provided with dropping valve c2 on supercooling flow path c, the pressure of refrigerant in supercooling flow path c can be reduced by dropping valve c2
And temperature.
It should be noted that the technical solution of the air-conditioning system of the utility model is particularly suitable for the direct refrigeration-type magnetic of water cooling
Suspension air-conditioning system.
From the foregoing it can be that using the technical solution of the utility model, solve in cold wind unit load operation with
Lower technical barrier：
It is big to solve single machine refrigeration requirement range, 10%~30% waits ultra-low loads that can not run；
Solve large area direct-expansion type evaporator, the uneven problem of operation shunting heat exchange；
It solves the small flow path system such as compressor or frequency converter cooling and generates absorbing gas belt liquid equivalent risk.
It also knows from the discussion above, using the technical solution of the utility model, realizes following advantageous effect：
Balanced evaporator surface temperature field promotes evaporating temperature, reduces height pressure difference, expands main unit load range of operation,
Promote operation in the confidence band of complete machine, it is ensured that the reliability service of unit at low load, to keep unit operation more energy saving
With it is reliable, improve the experience sense of user.Make actual set load operation and customer charge demand be in one to stablize and match pair
The relationship answered promotes annual operational energy efficiency, energy saving.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, the utility model embodiment can have various modifications and variations.All spirit in the utility model
Within principle, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (13)
1. a kind of air-conditioning system, including：Condenser (10), evaporator (20), compressor (30) and throttling set (40), it is described cold
Condenser (10), the evaporator (20), the compressor (30) and throttling set (40) form the circulatory system；
It is characterized in that,
The air-conditioning system further includes：
Bypass flow path (a), one end of the bypass flow path (a) connect the exhaust outlet of the compressor (30), the bypass flow path
(a) the other end connects the import of the evaporator (20), and the bypass flow path (a) is used to carry out in the air-conditioning system ultralow
It is opened when load operation, decompression is carried out to the refrigerant of the compressor (30) outflow and the refrigerant after decompression is led into the evaporation
Device (20).
2. air-conditioning system according to claim 1, which is characterized in that be provided with flow path control on the bypass flow path (a)
It switchs (a1), the stream way control switch (a1) is for controlling being turned on and off for the bypass flow path (a).
3. air-conditioning system according to claim 2, which is characterized in that be additionally provided with pressure tune on the bypass flow path (a)
Component (a2) is saved, in the downstream of the stream way control switch (a1), the pressure is adjusted for pressure regulating part (a2) setting
Component (a2) is for being depressured refrigerant.
4. air-conditioning system according to claim 3, which is characterized in that the pressure regulating part (a2) is at least two simultaneously
The capillary of connection.
5. air-conditioning system according to claim 1, which is characterized in that the air-conditioning system includes liquid separation head assembly (50),
The liquid separation head assembly (50) is connected between the upstream of the evaporator (20) and the evaporator (20), the liquid separation
Head assembly (50) is used to divide equally refrigerant to every heat exchange coil of the evaporator (20).
6. air-conditioning system according to claim 5, which is characterized in that the liquid separation head assembly (50) include access port and with
Multiple exits that the access port is connected, the access port are connect with the upstream of the evaporator (20), Mei Gesuo
Exit is stated to connect with each heat exchange coil of the evaporator (20) respectively.
7. air-conditioning system according to claim 5, which is characterized in that the evaporator (20) is multiple, corresponding, institute
It is multiple to state liquid separation head assembly (50) also, and the air-conditioning system further includes liquid separation packet (60), and the liquid separation packet (60) is connected to institute
It states between the upstream of evaporator (20) and the liquid separation head assembly (50), the liquid separation packet (60) is for giving refrigerant
Each liquid separation head assembly (50).
8. air-conditioning system according to claim 7, which is characterized in that the air-conditioning system further includes collection gas bag (70), institute
It states collection gas bag (70) to be connected between the downstream pipe and multiple evaporators (20) of multiple evaporators (20), the collection
Gas bag (70) is used to collect the refrigerant in multiple evaporators (20), and refrigerant is conveyed to downstream pipe.
9. air-conditioning system according to claim 1, which is characterized in that the air-conditioning system further includes cooling flowing path, described
Cooling flowing path is arranged between the downstream of the condenser (10) and the upstream of the evaporator (20), and the cooling flowing path is used for
The refrigerant flowed out in the condenser (10) is drawn, and is cooled down to the component to be cooled of process, finally leads to refrigerant
The evaporator (20).
10. air-conditioning system according to claim 9, which is characterized in that the component to be cooled includes the compressor
(30) bearing (32) of motor (31) and the compressor (30), the cooling flowing path include the first cooling flowing path (b1), institute
The first cooling flowing path (b1) is stated by the compressor (30) respectively to the motor (31) of the compressor (30) and the compression
The bearing (32) of machine (30) cools down.
11. air-conditioning system according to claim 10, which is characterized in that the component to be cooled further includes frequency conversion tank (81)
With electric cabinet (82), the cooling flowing path further includes the second cooling flowing path (b2), described in the second cooling flowing path (b2) process
Frequency conversion tank (81) and the electric cabinet (82) simultaneously respectively cool down to the frequency conversion tank (81) and the electric cabinet (82).
12. air-conditioning system according to claim 1, which is characterized in that set on the flow path where the throttling set (40)
It is equipped with economizer (c1), the air-conditioning system further includes supercooling flow path (c), and the supercooling flow path (c) is connected to the economizer
(c1) between downstream and the input terminal of the compressor (30), the supercooling flow path (c) is used to be depressured refrigerant, and passes through institute
It states economizer (c1) to cool down to the refrigerant in the flow path where the throttling set (40), be provided on the supercooling flow path (c)
Dropping valve (c2).
13. air-conditioning system according to claim 1, which is characterized in that the condenser (10) is Shell-tube Condenser, and/
Or the evaporator (20) is direct-expansion type evaporator and/or the compressor (30) is magnetic suspension compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820245404.0U CN207945857U (en) | 2018-02-09 | 2018-02-09 | Air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820245404.0U CN207945857U (en) | 2018-02-09 | 2018-02-09 | Air-conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207945857U true CN207945857U (en) | 2018-10-09 |
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ID=63699624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820245404.0U Active CN207945857U (en) | 2018-02-09 | 2018-02-09 | Air-conditioning system |
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| Country | Link |
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| CN (1) | CN207945857U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444122A (en) * | 2018-02-09 | 2018-08-24 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN111365908A (en) * | 2018-12-26 | 2020-07-03 | 珠海格力电器股份有限公司 | Refrigerant circulating system with supercooling function |
-
2018
- 2018-02-09 CN CN201820245404.0U patent/CN207945857U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444122A (en) * | 2018-02-09 | 2018-08-24 | 珠海格力电器股份有限公司 | Air-conditioning system |
| WO2019153881A1 (en) * | 2018-02-09 | 2019-08-15 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN111365908A (en) * | 2018-12-26 | 2020-07-03 | 珠海格力电器股份有限公司 | Refrigerant circulating system with supercooling function |
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