CN106369861A - Refrigeration device and control method thereof - Google Patents
Refrigeration device and control method thereof Download PDFInfo
- Publication number
- CN106369861A CN106369861A CN201610728871.4A CN201610728871A CN106369861A CN 106369861 A CN106369861 A CN 106369861A CN 201610728871 A CN201610728871 A CN 201610728871A CN 106369861 A CN106369861 A CN 106369861A
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- Prior art keywords
- heat exchanger
- outdoor heat
- refrigeration plant
- compressor
- pipeline
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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
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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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- 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
- F25B2313/029—Control issues
- F25B2313/0292—Control issues related to reversing 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0315—Temperature sensors near the outdoor heat exchanger
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2103—Temperatures near a heat exchanger
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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 refrigeration device and a control method thereof. The refrigeration device comprises a controller, a compressor, a four-way valve, an indoor heat exchanger and an outdoor heat exchanger, wherein the compressor, the four-way valve, the indoor heat exchanger and the outdoor heat exchanger are electrically connected with the controller; the compressor, the four-way valve, the indoor heat exchanger and the outdoor heat exchanger are communicated through a pipeline to form a refrigerant circulating loop, the indoor heat exchanger and the compressor are communicated through a pipeline to form a bypass branch which passes through the bottom of the outdoor heat exchanger, and the refrigeration device further comprises a throttling device electrically connected with the controller; the throttling device is mounted at the pipeline, between the indoor heat exchanger and the outdoor heat exchanger, of the bypass branch. Accordingly, the temperature of the bottom of the outdoor heat exchanger is higher than that of the top of the outdoor heat exchanger; due to the fact that the flowing speed of air on the top of the outdoor heat exchanger is high, frosting is avoided; due to the fact that the temperature of the bottom of the outdoor heat exchanger is high, condensation dropping to the bottom of the outdoor heat exchanger can be prevented from being frosted, and therefore the risk of bottom frosting of the outdoor heat exchanger is reduced.
Description
Technical field
The present invention relates to refrigeration technology field, particularly to a kind of refrigeration plant and its control method.
Background technology
As the commonly used refrigeration plant arriving in daily life, it includes compressor to air-conditioner, cross valve, interior are changed
The parts such as hot device and outdoor heat exchanger, compressor, cross valve, indoor heat exchanger and outdoor heat exchanger connect shape by pipeline
Become the refrigerant circulation circuit for the coolant flowing in compressor.
When heating, the coolant in refrigerant circulation circuit carries out heat exchange with outdoor heat exchanger to air-conditioner, and makes outdoor
The temperature of heat exchanger surface is low, and air forms condensation to the cold and on the surface of air-conditioner outdoor unit, if outdoor heat exchanger exists for a long time
Work under low temperature environment, then the surface condensation of outdoor heat exchanger can be led to freeze, and then reduce the performance of outdoor heat exchanger.
Content of the invention
The main object of the present invention is to propose a kind of refrigeration plant it is intended to reduce the frosting of the outdoor heat exchanger of refrigeration plant
Risk.
For achieving the above object, refrigeration plant proposed by the present invention, it includes controller and described controller is electrically connected with
Compressor, cross valve, indoor heat exchanger and outdoor heat exchanger, described compressor, cross valve, indoor heat exchanger and outdoor are changed
Hot device forms refrigerant circulation circuit by pipeline connection, and described indoor heat exchanger forms bypass with compressor by pipeline connection
Road, and described bypass branch passes through the bottom of described outdoor heat exchanger；
Described refrigeration plant also includes the choke valve being electrically connected with described controller, and described choke valve is installed on described side
Logical branch road on the pipeline between described indoor heat exchanger and outdoor heat exchanger.
Preferably, described refrigeration plant also includes the first temperature sensor being electrically connected with described controller and the second temperature
Degree sensor, described first temperature sensor be installed on described bypass branch positioned between described choke valve and outdoor heat exchanger
Pipeline on, described second temperature sensor be installed on described bypass branch positioned between described outdoor heat exchanger and compressor
Pipeline on, described controller according to described first temperature sensor and second temperature sensor detection temperature gap control institute
State the aperture of choke valve.
Preferably, described compressor is screw compressor, in the compression chamber of described bypass branch and described screw compressor
Nip connects.
Preferably, the continuous bending of the pipeline of the bottom by described outdoor heat exchanger for the described bypass branch and disc-shaped set
Put.
Preferably, described refrigeration plant also includes the flow-limiting valve being electrically connected with described controller, and described flow-limiting valve is installed
In described refrigerant circulation circuit on the pipeline between described indoor heat exchanger and outdoor heat exchanger.
Preferably, described refrigeration plant includes stop valve, described stop valve be installed on described closed circuit positioned at described
On pipeline between flow-limiting valve and indoor heat exchanger, described bypass branch and described refrigerant circulation circuit are positioned at described flow-limiting valve
Pipeline connection and stop valve between.
Preferably, described refrigeration plant includes the indoor heat exchangers of multiple parallel connections, and multiple described indoor heat exchangers are all and institute
State bypass branch connection setting.
The present invention also proposes a kind of control method of refrigeration plant, comprising:
In temperature t1 before coolant and outdoor heat exchanger heat exchange in detection bypass branch and bypass branch, coolant is changed with outdoor
Temperature t2 after hot device heat exchange；
Temperature gap according to t1 and t2 controls the aperture of throttling arrangement.
Preferably, the described temperature gap according to t1 and t2 controls the aperture of choke valve to comprise determining that described t1's and t2
The threshold value shelves that difference is mated；
Obtain the aperture of the corresponding described throttling arrangement of threshold value shelves that the difference of described t1 and t2 is mated；
The aperture of the described throttling arrangement obtaining is set to the current aperture of this throttling arrangement.
The present invention passes through to set up the bypass branch of connection indoor heat exchanger and compressor, and this bypass branch is passed through outdoor
The bottom setting of heat exchanger；Meanwhile, the pipeline being located outside between heat exchanger and indoor heat exchanger of bypass branch is arranged
Throttling arrangement, this throttling arrangement is used for the coolant pressure limiting in bypass branch being throttled into middle pressure condition, due to middle pressure liquid refrigerants
The heat that heat absorption becomes required for middle pressure gaseous coolant is less than the heat absorption of low-pressure liquid coolant and becomes required for low-pressure gaseous coolant
Heat.So so that the temperature of outdoor heat exchanger bottom is higher than the temperature at outdoor heat exchanger top, due to outdoor heat exchanger top
Speed air flow is fast, and then can avoid frosting；The bottom of outdoor heat exchanger is higher due to temperature, so, can avoid dripping
To the condensation frosting of the bottom of outdoor heat exchanger, thus reducing the risk of the bottom frosting of outdoor heat exchanger.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the structural representation of refrigeration plant one embodiment of the present invention；
Fig. 2 is that in Fig. 1, the temperature gap of the first temperature sensor and second temperature sensor and the aperture of throttling arrangement are closed
System's figure；
Fig. 3 is the schematic flow sheet of control method one embodiment of refrigeration plant of the present invention；
Fig. 4 is the idiographic flow schematic diagram of step s20 in Fig. 3.
Drawing reference numeral illustrates:
| Label | Title | Label | Title |
| 100 | Refrigeration plant | 1b | Bypass branch |
| 10 | Compressor | 60 | Throttling arrangement |
| 20 | Cross valve | 70 | First temperature sensor |
| 30 | Indoor heat exchanger | 80 | Second temperature sensor |
| 40 | Outdoor heat exchanger | 90 | Flow-limiting valve |
| 1a | Refrigerant circulation circuit | 95 | Stop valve |
| 50 | Gas-liquid separator |
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of not making creative work all its
His embodiment, broadly falls into the scope of protection of the invention.
If it is to be appreciated that relating to directivity instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in drawings) relative position relation between each part,
Motion conditions etc., if this particular pose changes, directionality instruction also correspondingly changes therewith.
If in addition, relating to the description of " first ", " second " etc. in the embodiment of the present invention, should " first ", " second " etc.
Description be only used for describing purpose, and it is not intended that instruction or imply its relative importance or implicit indicate indicated skill
The quantity of art feature.Thus, define " first ", the feature of " second " can be expressed or implicitly include at least one this spy
Levy.In addition, the technical scheme between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
Based on enough realizations, will be understood that the knot of this technical scheme when the combination appearance of technical scheme is conflicting or cannot realize
Close and do not exist, also not within the protection domain of application claims.
In order to reduce the frosting risk of the outdoor heat exchanger of refrigeration plant, the present invention proposes a kind of new refrigeration plant, please
With reference to Fig. 1, Fig. 1 shows the structural representation of refrigeration plant one embodiment of the present invention.
This refrigeration plant 100 includes controller (not shown), compressor 10, cross valve 20, indoor heat exchanger 30 and room
External heat exchanger 40 grade parts.
Above-mentioned compressor 10, cross valve 20, indoor heat exchanger 30 and outdoor heat exchanger 40 are formed cold by pipeline connection
Matchmaker closed circuit 1a.Specifically, the air vent of compressor 10 is connected with the first interface of cross valve 20 by pipeline, compressor 10
Air inlet connected with the second interface of cross valve 20 by pipeline；Indoor heat exchanger 30 passes through pipeline and outdoor heat exchanger 40 connects
Logical, and indoor heat exchanger 30 passes through the 3rd orifice of pipeline and cross valve 20, outdoor heat exchanger 40 passes through pipeline and four-way
4th orifice of valve 20, so constitutes refrigerant circulation circuit 1a of coolant in compressor 10.
It should be noted that in order to avoid liquid refrigerants flow to the normal work of impact compressor 10 in compressor 10, leading to
Often gas-liquid separator 50 can be set on the pipeline with cross valve 20 for the gas returning port of connection compressor 10.
Above-mentioned compressor 10, cross valve 20, indoor heat exchanger 30 and outdoor heat exchanger 40 are all electrically connected with controller,
And be operated under the control of the controller, namely realize the refrigeration of refrigeration plant 100 and heat.
In order to avoid refrigeration plant 100 is when heating, the problem of frosting in the outdoor heat exchanger 40 of refrigeration plant 100,
Above-mentioned refrigeration plant 100 is additionally provided with the bypass branch 1b of connection indoor heat exchanger 30 and compressor 10, and this bypass is propped up
Throttling arrangement 60 is additionally provided with the 1b of road.Specifically, this bypass branch 1b passes through the bottom setting of above-mentioned outdoor heat exchanger 40,
This throttling arrangement 60 is installed on the pipeline being located outside between heat exchanger 40 and indoor heat exchanger 30 of bypass branch 1b.
When above-mentioned refrigeration plant 100 freezes, the high pressure gaseous coolant in compressor is flow to by cross valve 20
After outdoor heat exchanger 40, form high-pressure liquid coolant, now, the high-pressure liquid coolant in refrigerant circulation circuit 1a is a part of permissible
It is flow in indoor heat exchanger 30 by refrigerant circulation circuit 1a, another part can flow through outdoor heat exchanger by bypass branch 1b
It is back to after 40 in compressor 10, it should be noted that throttling arrangement 60 needs to the high-pressure liquid coolant in bypass branch 1b
Throttling pressure limiting become in press liquid refrigerants, middle pressure liquid refrigerants by with outdoor heat exchanger 40 heat exchange after become middle pressure gaseous coolant again
It is back in compressor.
When above-mentioned refrigeration plant 100 heats, the high pressure gaseous coolant in compressor 10 is flowed by cross valve 20
To indoor heat exchanger 30, high-pressure gaseous refrigerant by with indoor heat exchanger 30 heat exchange after form high-pressure liquid coolant；Now, high pressure
A liquid refrigerants part can be flow in compressor 10 by refrigerant circulation circuit 1a, and another part can pass through bypass branch 1b
It flow in compressor 10；High-pressure liquid coolant, before flowing through outdoor heat exchanger 40, blood pressure lowering can form low-pressure liquid coolant, and other
In the presence of throttling arrangement 60, blood pressure lowering forms middle pressure liquid refrigerants to high-pressure liquid coolant in logical branch road 1b.Need explanation
It is that the heat that middle pressure liquid refrigerants heat absorption becomes required for middle pressure gaseous coolant is less than the heat absorption of low-pressure liquid coolant and becomes low pressure gas
Heat required for state coolant.So so that the temperature of outdoor heat exchanger 40 bottom is higher than the temperature at outdoor heat exchanger 40 top,
Because outdoor heat exchanger 40 headspace flowing velocity is fast, and then frosting can be avoided；And the bottom of outdoor heat exchanger 40 then by
In temperature higher it is also possible to avoid dropping to the condensed water frosting of the bottom of outdoor heat exchanger 40, thus reducing outdoor heat exchanger 40
Bottom frosting risk.
The present invention passes through to set up the bypass branch 1b of connection indoor heat exchanger 30 and compressor 10, and by this bypass branch 1b
By the bottom setting of outdoor heat exchanger 40；Meanwhile, it is located outside heat exchanger 40 and indoor heat exchanger 30 in bypass branch 1b
Between pipeline on arrange throttling arrangement 60, this throttling arrangement 60 be used for the coolant pressure limiting in bypass branch 1b is throttled into middle pressure
State, becomes because the heat that middle pressure liquid refrigerants heat absorption becomes required for middle pressure gaseous coolant is less than the heat absorption of low-pressure liquid coolant
Heat required for low-pressure gaseous coolant.So so that the temperature of outdoor heat exchanger 40 bottom is higher than outdoor heat exchanger 40 top
Temperature, because outdoor heat exchanger 40 headspace flowing velocity is fast, and then frosting can be avoided；The bottom of outdoor heat exchanger 40
Because temperature is higher, and then can avoid dropping to the condensed water frosting of the bottom of outdoor heat exchanger 40, thus reducing outdoor heat exchange
The risk of the bottom frosting of device 40.
Above-mentioned throttling arrangement 60 can be choke valve, throttle pipe or other there is the structure of throttling function, here, just
Do not enumerate.In an embodiment of the present invention, it is specifically described with throttling arrangement 60 for choke valve, this choke valve and control
Device processed is electrically connected with, and controller is used for controlling the aperture of this choke valve, to ensure that the coolant in bypass branch 1b is always middle pressure
Liquid refrigerants, and then ensure that refrigeration plant 100 when heating, a part of coolant in refrigerant circulation circuit 1a passes through bypass
The bottom heat exchange of road 1b and outdoor heat exchanger 40 it is ensured that the bottom temp of outdoor heat exchanger 40 will not be too low, thus avoiding
The bottom of outdoor heat exchanger 40 is not in the problem of frosting, improves the performance of refrigeration plant 100.
In order to realize the aperture of the above-mentioned choke valve of Based Intelligent Control, above-mentioned refrigeration plant 100 also sets on bypass branch 1b
Put the first temperature sensor 70 and second temperature sensor 80.Specifically, the first temperature sensor 70 is installed on above-mentioned bypass and props up
On the pipeline between above-mentioned choke valve and outdoor heat exchanger 40 of road 1b, second temperature sensor 80 is installed on above-mentioned bypass
On the pipeline being located outside between heat exchanger 40 and compressor 10 of branch road 1b.First temperature sensor 70 and second temperature sensing
Device 80 is used to detect the temperature of coolant in bypass branch 1b.
Specifically, represent the refrigerant temperature of above-mentioned first temperature sensor 70 detection with t1, indicate above-mentioned second temperature with t2
The refrigerant temperature of degree sensor 80 detection, before the difference of t1 and t2 is coolant and outdoor heat exchanger 40 heat exchange in bypass branch 1b
Temperature difference afterwards, it should be noted that the difference of t1 and t2 can be divided into multiple intervals.Above-mentioned controller corresponds to each area
Between be provided with threshold value shelves, an and aperture of the corresponding choke valve of each threshold value shelves.Controller noted above is according to the difference of t1 and t2
It is located interval, control whether choke valve increases aperture, keeps aperture or reduce aperture.It is arranged such it is achieved that Based Intelligent Control
The aperture of choke valve.
Above-mentioned choke valve can be 480 steps or the choke valve of 2000 steps.Refer to Fig. 2, Fig. 2 shows between t1 and t2
Difference and throttle valve opening between relation.
When controller detect the difference of t1 and t2 between 5～8 DEG C when, controller control choke valve aperture be a step；
When controller detect the difference of t1 and t2 between 3～5 DEG C when, controller control choke valve aperture be a-4 step；Work as control
When device detects the difference of t1 and t2 less than 3 DEG C, it is that a-8 walks that controller controls the aperture of choke valve；When controller detects t1
With the difference of t2 is for, when between 8～10 DEG C, it is that a+4 walks that controller controls the aperture of choke valve；When controller detects t1 and t2
Difference be more than 10 DEG C when, controller control choke valve aperture be a+8 step.
In order to improve the performance of refrigeration plant 100, the compressor 10 in the present invention adopts screw compressor 10, scroll compression
The compression chamber of machine 10 is followed successively by higher-pressure region, middle nip and low-pressure area from inside to outside, enters pressure from the air inlet of screw compressor 10
The coolant of contracting intracavity is introduced into the low-pressure area of compression chamber, arranges after the compression of screw compressor 10 forms high pressure refrigerant again
Go out.Above-mentioned bypass branch 1b connects setting with nip in the compression chamber of screw compressor 10, due in screw compressor 10
Nip is constantly in suction condition, thus the coolant in bypass branch 1b is all the time toward the compression intracavity flowing of screw compressor 10.
When above-mentioned refrigeration plant 100 freezes, the high pressure gaseous coolant in compressor 10 is flow to by cross valve 20
In outdoor heat exchanger 40, high-pressure liquid coolant forms high-pressure liquid coolant with outdoor heat exchanger 40 heat exchange；Now high-pressure liquid is cold
Matchmaker's part can be flow in indoor heat exchanger 30 by refrigerant circulation circuit 1a, and another part can be flowed by bypass branch 1b
To compressor 10, and need to first pass through throttling arrangement 60 blood pressure lowering by the coolant that bypass branch 1b is back in compressor 10
Middle pressure liquid refrigerants, and the middle pressure liquid refrigerants in bypass branch 1b flows through and carries out heat exchange during outdoor heat exchanger 40 and become
After middle pressure gaseous coolant, enter nip in the compression chamber of screw compressor 10.
When above-mentioned refrigeration plant 100 heats, the high pressure gaseous coolant in compressor 10 is flowed by cross valve 20
To indoor heat exchanger 30, high-pressure gaseous refrigerant by with indoor heat exchanger 30 heat exchange after form high-pressure liquid coolant；Now, high pressure
A liquid refrigerants part can be flow in compressor 10 by refrigerant circulation circuit 1a, and another part can pass through bypass branch 1b
It flow in compressor 10；High-pressure liquid coolant, before flowing through outdoor heat exchanger 40, blood pressure lowering can form low-pressure liquid coolant, and other
In the presence of throttling arrangement 60, blood pressure lowering forms middle pressure liquid refrigerants, bypass branch 1b to high-pressure liquid coolant in logical branch road 1b
In middle hydraulic fluid coolant through with outdoor heat exchanger 40 heat exchange after, become middle pressure gaseous coolant, and middle pressure gaseous coolant be passed directly into
Intermediate pressure section in the compression chamber of screw compressor 10, and mix with the middle pressure gaseous coolant in screw compressor 10.It is arranged such, have
Beneficial to the power consumption reducing screw compressor 10, and then be conducive to improving the performance of refrigeration plant 100.
The pipeline of the bottom being located outside heat exchanger 40 of above-mentioned bypass branch 1b continuously bends and disc-shaped setting.Specifically
, this bypass branch 1b can continuously be bent to form discoid, sale at reduced prices shape or other shapes, be arranged such, can increase side
Logical branch road 1b and the heat exchange area of outdoor heat exchanger 40, and then ensure that the coolant in bypass branch 1b is entered with outdoor heat exchanger 40
The sufficient heat exchange of row, it is to avoid have the liquid refrigerants to be back to the compression intracavity of screw compressor 10 in bypass branch 1b, and lead to
Screw compressor 10 cannot normal work problem occur.
Above-mentioned refrigeration plant 100 also includes the flow-limiting valve 90 being electrically connected with controller, and this flow-limiting valve 90 is installed on cold
On the pipeline between indoor heat exchanger 30 and outdoor heat exchanger 40 of matchmaker closed circuit 1a.This flow-limiting valve 90 is used for coolant
Coolant in closed circuit 1a carries out current limliting blood pressure lowering.
Specifically, when refrigeration plant 100 is heated, this flow-limiting valve 90 is by the high-pressure liquid in refrigerant circulation circuit 1a
Coolant current limliting is depressurized to low-pressure liquid coolant；When refrigeration plant 100 is freezed, this flow-limiting valve 90 is shown in a fully open operation.
Above-mentioned refrigeration plant 100 also includes stop valve 95, this stop valve 95 install refrigerant circulation circuit 1a positioned at limit
On pipeline between stream valve 90 and indoor heat exchanger 30.It should be noted that above-mentioned indoor heat exchanger 30 and outdoor heat exchanger
Between 40 do not connect, the pipeline of above-mentioned indoor heat exchanger 30 is blocked by above-mentioned stop valve 95, so, it is possible to avoid indoor heat exchange
Coolant leakage in device 30.
The pipeline between flow-limiting valve 90 and stop valve 95 of above-mentioned bypass branch 1b and refrigerant circulation circuit 1a is even
Logical.It is arranged such, the use of the pipeline of refrigeration plant 100 can be saved, and then advantageously reduce the cost of refrigeration plant 100.
Above-mentioned refrigeration plant 100 also includes multiple indoor heat exchangers 30, and multiple indoor heat exchangers 30 are using side in parallel
Formula, and multiple indoor heat exchanger 30 all connects setting with bypass branch 1b.It is arranged such, improve this refrigeration plant 100
Performance, advantageously reduces the energy consumption of refrigeration plant 100.
Refer to Fig. 3, the present invention also proposes a kind of control method of refrigeration plant 100, comprising:
Step s10: cold in temperature t1 before coolant and outdoor heat exchanger heat exchange in detection bypass branch 1b and bypass branch
Temperature t2 after matchmaker and outdoor heat exchanger heat exchange.
Specifically, the setting on the pipeline between above-mentioned throttling arrangement 60 and outdoor heat exchanger 40 of above-mentioned bypass branch 1b
It is equipped with the first temperature sensor 70；Set on the pipeline being located outside between heat exchanger 40 and compressor 10 of above-mentioned bypass branch 1b
It is equipped with second temperature sensor 80；First temperature sensor 70 is used for detecting that in bypass branch 1b, coolant and outdoor heat exchanger 40 change
Temperature t1 before heat, second temperature sensor 80 is used for the temperature after detecting coolant and outdoor heat exchanger 40 heat exchange in bypass branch 1b
Degree t2.
Step s20: the temperature gap according to t1 and t2 controls the aperture of throttling arrangement.
Specifically, controller noted above is electrically connected with the first temperature sensor 70 and second temperature sensor 80 respectively, control
When device processed receives temperature t2 of temperature t1 of the first temperature sensor 70 detection and second temperature sensor 80 detection, and judge
The scope that the temperature gap of t1 and t2 is located, the scope control throttling arrangement 60 that controller is located according to the temperature gap of t1 and t2
Aperture.
Refer to Fig. 4, above-mentioned steps s20 include:
Step s201: determine the threshold value shelves that the difference of above-mentioned t1 and t2 is mated.
The difference of above-mentioned t1 and t2 can be divided into multiple intervals, and specifically, it is one that the difference of t1 and t2 is more than when 10 DEG C
Threshold value shelves；The difference range of t1 and t2 is threshold value shelves between 8～10 DEG C；The difference range of t1 and t2 is between 5～8 DEG C
One threshold value shelves；The difference range of t1 and t2 is threshold value shelves between 3～5 DEG C；It is a threshold value that the difference of t1 and t2 is less than 3 DEG C
Shelves.It is, of course, also possible to divide according to other interval ranges, here does not do specific restriction.
Step s202: the aperture of the corresponding throttling arrangement of threshold value shelves that the difference of above-mentioned t1 and t2 of acquisition is mated.
Step s203: the aperture of the throttling arrangement of acquisition is set to the current aperture of this throttling arrangement.
Specifically, above-mentioned throttling arrangement 60 adopts the choke valve of 480 steps or 2000 steps, when controller detects t1's and t2
When difference is between 5～8 DEG C, controller controls the aperture of choke valve to walk for a；When controller detects the difference of t1 and t2 3
When between～5 DEG C, controller controls the aperture of choke valve to walk for a-4；When the difference that controller detects t1 and t2 is less than 3 DEG C
When, controller controls the aperture of choke valve to walk for a-8；When between the difference that controller detects t1 and t2 being 8～10 DEG C, control
Device processed controls the aperture of choke valve to walk for a+4；When the difference that controller detects t1 and t2 is more than 10 DEG C, controller controls section
The aperture of stream valve walks for a+8.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the present invention the scope of the claims, every this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/indirectly use
In the scope of patent protection that other related technical fields are included in the present invention.
Claims (9)
1. a kind of refrigeration plant it is characterised in that include compressor, cross valve that controller and described controller be electrically connected with,
Indoor heat exchanger and outdoor heat exchanger, described compressor, cross valve, indoor heat exchanger and outdoor heat exchanger pass through pipeline connection
Form refrigerant circulation circuit, described indoor heat exchanger forms bypass branch with compressor by pipeline connection, and described bypass
The bottom of described outdoor heat exchanger is passed through on road；
Described refrigeration plant also includes the throttling arrangement being electrically connected with described controller, and described throttling arrangement is installed on described side
Logical branch road on the pipeline between described indoor heat exchanger and outdoor heat exchanger.
2. refrigeration plant as claimed in claim 1 it is characterised in that described throttling arrangement be choke valve, described refrigeration plant
Also include the first temperature sensor and the second temperature sensor being electrically connected with described controller, described first temperature sensor
Be installed on described bypass branch on the pipeline between described choke valve and outdoor heat exchanger, described second temperature sensor
Be installed on described bypass branch on the pipeline between described outdoor heat exchanger and compressor, described controller is according to described
The temperature gap of the first temperature sensor and second temperature sensor detection controls the aperture of described choke valve.
3. refrigeration plant as claimed in claim 1 it is characterised in that described compressor is screw compressor, prop up by described bypass
Road is connected with nip in the compression chamber of described screw compressor.
4. refrigeration plant as claimed in claim 1 it is characterised in that described bypass branch positioned at described outdoor heat exchanger
The pipeline of bottom continuously bends and disc-shaped setting.
5. refrigeration plant as claimed in claim 1 it is characterised in that described refrigeration plant also include electrical with described controller
Connect flow-limiting valve, described flow-limiting valve be installed on described refrigerant circulation circuit positioned at described indoor heat exchanger and outdoor heat exchanger
Between pipeline on.
6. refrigeration plant as claimed in claim 5 is it is characterised in that described refrigeration plant includes stop valve, described stop valve
Be installed on described closed circuit on the pipeline between described flow-limiting valve and indoor heat exchanger, described bypass branch with described
Refrigerant circulation circuit positioned at the pipeline connection between described flow-limiting valve and stop valve.
7. the refrigeration plant as described in any one in claim 1 to 6 it is characterised in that described refrigeration plant include multiple
Indoor heat exchanger in parallel, multiple described indoor heat exchangers all connect setting with described bypass branch.
8. a kind of control method of refrigeration plant is it is characterised in that include:
Coolant and outdoor heat exchanger in temperature t1 before coolant and outdoor heat exchanger heat exchange in detection bypass branch and bypass branch
Temperature t2 after heat exchange；
Temperature gap according to t1 and t2 controls the aperture of throttling arrangement.
9. the control method of refrigeration plant as claimed in claim 8 is it is characterised in that the described temperature gap according to t1 and t2
The aperture controlling throttling arrangement includes:
Determine the threshold value shelves that the difference of described t1 and t2 is mated；
Obtain the aperture of the corresponding described throttling arrangement of threshold value shelves that the difference of described t1 and t2 is mated；
The aperture of the described throttling arrangement obtaining is set to the current aperture of this throttling arrangement.
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| CN201610728871.4A CN106369861A (en) | 2016-08-25 | 2016-08-25 | Refrigeration device and control method thereof |
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| CN201610728871.4A CN106369861A (en) | 2016-08-25 | 2016-08-25 | Refrigeration device and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101275A (en) * | 2017-06-01 | 2017-08-29 | 青岛海尔空调器有限总公司 | A kind of air conditioner and its control method |
| CN111578547A (en) * | 2020-05-28 | 2020-08-25 | 珠海格力电器股份有限公司 | Double-backheating refrigerating system and control method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0351670A (en) * | 1989-07-19 | 1991-03-06 | Hitachi Ltd | Freezing cycle |
| CN201438057U (en) * | 2009-05-07 | 2010-04-14 | 宁波奥克斯电气有限公司 | Hot-gas bypass air conditioner |
| CN102679609A (en) * | 2012-06-07 | 2012-09-19 | 四川同达博尔置业有限公司 | Air-cooled heat pump air conditioner |
| CN103307804A (en) * | 2013-06-14 | 2013-09-18 | 上海海立睿能环境技术有限公司 | Defrosting system for heat pump |
| CN104896785A (en) * | 2015-05-15 | 2015-09-09 | 广东美的暖通设备有限公司 | Enhanced vapor injection multi-online air conditioning system and control method thereof |
| CN105157270A (en) * | 2015-09-24 | 2015-12-16 | 无锡同方人工环境有限公司 | Low-environment-temperature air source heat pump system with undercooling loop |
| CN105352225A (en) * | 2014-08-21 | 2016-02-24 | 广东美的制冷设备有限公司 | Air conditioner |
| CN205373132U (en) * | 2015-12-29 | 2016-07-06 | Tcl空调器(中山)有限公司 | Indoor temperature regulation and control system and air conditioner |
| CN205481903U (en) * | 2016-03-31 | 2016-08-17 | 郑州欧纳尔冷暖科技有限公司 | Low ring temperature heat pump set |
-
2016
- 2016-08-25 CN CN201610728871.4A patent/CN106369861A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0351670A (en) * | 1989-07-19 | 1991-03-06 | Hitachi Ltd | Freezing cycle |
| CN201438057U (en) * | 2009-05-07 | 2010-04-14 | 宁波奥克斯电气有限公司 | Hot-gas bypass air conditioner |
| CN102679609A (en) * | 2012-06-07 | 2012-09-19 | 四川同达博尔置业有限公司 | Air-cooled heat pump air conditioner |
| CN103307804A (en) * | 2013-06-14 | 2013-09-18 | 上海海立睿能环境技术有限公司 | Defrosting system for heat pump |
| CN105352225A (en) * | 2014-08-21 | 2016-02-24 | 广东美的制冷设备有限公司 | Air conditioner |
| CN104896785A (en) * | 2015-05-15 | 2015-09-09 | 广东美的暖通设备有限公司 | Enhanced vapor injection multi-online air conditioning system and control method thereof |
| CN105157270A (en) * | 2015-09-24 | 2015-12-16 | 无锡同方人工环境有限公司 | Low-environment-temperature air source heat pump system with undercooling loop |
| CN205373132U (en) * | 2015-12-29 | 2016-07-06 | Tcl空调器(中山)有限公司 | Indoor temperature regulation and control system and air conditioner |
| CN205481903U (en) * | 2016-03-31 | 2016-08-17 | 郑州欧纳尔冷暖科技有限公司 | Low ring temperature heat pump set |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101275A (en) * | 2017-06-01 | 2017-08-29 | 青岛海尔空调器有限总公司 | A kind of air conditioner and its control method |
| CN111578547A (en) * | 2020-05-28 | 2020-08-25 | 珠海格力电器股份有限公司 | Double-backheating refrigerating system and control method thereof |
| CN111578547B (en) * | 2020-05-28 | 2021-06-08 | 珠海格力电器股份有限公司 | Control method of double-backheating refrigerating system |
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Application publication date: 20170201 |