CN107477928A - The control method of throttle mechanism, refrigeration system and refrigeration system - Google Patents
The control method of throttle mechanism, refrigeration system and refrigeration system Download PDFInfo
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- CN107477928A CN107477928A CN201710873598.9A CN201710873598A CN107477928A CN 107477928 A CN107477928 A CN 107477928A CN 201710873598 A CN201710873598 A CN 201710873598A CN 107477928 A CN107477928 A CN 107477928A
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- throttle mechanism
- working condition
- throttling arrangement
- port
- suction superheat
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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
- 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
- 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
- F25B41/31—Expansion 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
- F25B41/37—Capillary tubes
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
-
- 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
- F25B2600/2513—Expansion 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
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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)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses the control method of a kind of throttle mechanism, refrigeration system and refrigeration system.Throttle mechanism has the first cold-producing medium stream port and second refrigerant communication port and including main throttling arrangement, auxiliary throttling arrangement and control device.Throttle mechanism has the first working condition and the second working condition, and in the first working condition, the refrigerant that control device control enters throttle mechanism from the first cold-producing medium stream port flow to the second refrigerant communication port by main throttling arrangement.In the second working condition, the refrigerant that control device control enters throttle mechanism from the first cold-producing medium stream port flow to second refrigerant communication port by the main throttling arrangement and auxiliary throttling arrangement of series connection.The throttle mechanism of the present invention improves the problem of existing throttling noise of refrigeration system of the prior art is larger.
Description
Technical field
The present invention relates to refrigeration technology field, the control of more particularly to a kind of throttle mechanism, refrigeration system and refrigeration system
Method.
Background technology
Container is in the case where freezing operating mode, and the temperature inside the box is minimum to can reach -30 DEG C, and case is outer due to being sea transport environment,
Temperature can reach more than 50 DEG C.Therefore container refrigeration system needs the reliability service under the operating mode of High Pressure Difference.Current
Container refrigeration system is mostly by the way of pressure difference feed flow.Under High Pressure Difference operating mode, because the inspiratory capacity of refrigeration system is few, system
The circulating mass of refrigerant of cooling system is few, and the aperture of throttling arrangement will become very little, and now, throttling arrangement will produce howling,
Have a strong impact on the Consumer's Experience of refrigeration system.
In addition, container refrigeration system, when starting cooling, the temperature inside and outside case may be 40 DEG C or so, even more
Height, now the circulating mass of refrigerant of refrigeration system is very big.When the aperture of throttling arrangement reaches maximum, refrigerant passes through evaporator
Afterwards, suction superheat is still very big, causes evaporator feed flow insufficient.
The content of the invention
It is an object of the invention to provide the control method of a kind of throttle mechanism, refrigeration system and refrigeration system, to improve
The problem of existing throttling noise of throttling arrangement of the prior art is larger.
First aspect present invention provides a kind of throttle mechanism, and the throttle mechanism has the first cold-producing medium stream port and second
Cold-producing medium stream port and including main throttling arrangement, auxiliary throttling arrangement and control device, the throttle mechanism has the first work shape
State and the second working condition, in first working condition, the control device control is entered from the first cold-producing medium stream port
The refrigerant for entering the throttle mechanism flow to the second refrigerant communication port by the main throttling arrangement；In second work
Make state, the refrigerant that the control device control enters the throttle mechanism from the first cold-producing medium stream port passes through series connection
The main throttling arrangement and the auxiliary throttling arrangement flow to the second refrigerant communication port.
Further, the main throttling arrangement has first port and second port, and the throttle mechanism also includes setting
First flow path and second flow path between the first port of the first cold-producing medium stream port and the main throttling arrangement, it is described
Auxiliary throttling arrangement is arranged in the second flow path, the second port of the main throttling arrangement and the second refrigerant communication port
Connection, in first working condition, the control device controls the first flow path connection and controls the second flow path to break
Open；In second working condition, the control device controls the first flow path to disconnect and controls the second flow path to connect.
Further, the control device includes being arranged in the first flow path to control the break-make of the first flow path
The first on-off valve and be arranged in the second flow path to control the second on-off valve of the break-make of the second flow path.
Further, second on-off valve is arranged between the main throttling arrangement and the auxiliary throttling arrangement.
Further, the control device also includes being arranged at the auxiliary throttling arrangement and the second refrigerant communication port
Between the 3rd on-off valve.
Further, the main throttling arrangement includes expansion valve or capillary；And/or the auxiliary throttling arrangement is including swollen
Swollen valve or capillary.
Further, the throttle mechanism also has the 3rd working condition, in the 3rd working condition, the control dress
Put control from the first cold-producing medium stream port enter the refrigerant of the throttle mechanism respectively by the main throttling arrangement and
The auxiliary throttling arrangement flows to the second refrigerant communication port.
Further, the throttle mechanism also has the 3rd working condition, in the 3rd working condition, the control dress
Put control from the first cold-producing medium stream port enter the refrigerant of the throttle mechanism respectively by the main throttling arrangement and
The auxiliary throttling arrangement flows to the second refrigerant communication port, and the auxiliary throttling arrangement has first port and second port,
The first port of the auxiliary throttling arrangement connects with the first cold-producing medium stream port, and the throttle mechanism also includes being arranged at institute
The 3rd stream between the second port of auxiliary throttling arrangement and the second refrigerant communication port is stated, in the described first work shape
State, the control device control the 3rd stream to disconnect；In the 3rd working condition, the control device control described the
One fluid communication and control the 3rd fluid communication.
Second aspect of the present invention provides a kind of refrigeration system, including be sequentially connected compressor, condenser, such as present invention the
On the one hand the throttle mechanism and evaporator that any one provides, the first cold-producing medium stream port connects with the condenser, described
Second refrigerant communication port connects with the evaporator.
Further, the refrigeration system includes container refrigeration system.
Third aspect present invention provides a kind of control method of the refrigeration system provided based on second aspect of the present invention, including
Following steps：
Obtain between the current suction superheat angle value of the compressor and the pressure at expulsion and pressure of inspiration(Pi) of the compressor
Current pressure difference；
Control whether the throttle mechanism is in institute according to the current suction superheat angle value and the current pressure difference
State the first working condition or whether be in second working condition.
Further, the refrigeration system has setting suction superheat angle value scope and set pressure differential value, according to described
Current suction superheat angle value and the current pressure difference control the throttle mechanism whether in first working condition or
Whether second working condition includes：
When the current suction superheat angle value is in the range of the setting suction superheat angle value,
If the current pressure difference is less than the set pressure differential value, the throttle mechanism is controlled to be in first work
Make state；If the current pressure difference is not less than the set pressure differential value, the throttle mechanism is controlled to be in described second
Working condition.
Further, the throttle mechanism also has the 3rd working condition, in the 3rd working condition, from described first
The refrigerant that cold-producing medium stream port enters the throttle mechanism passes through the main throttling arrangement and the auxiliary throttling arrangement stream respectively
To the second refrigerant communication port, the control method also includes：
When the current suction superheat angle value is less than or equal to the minimum value of the setting suction superheat scope, institute is controlled
State throttle mechanism and be in first working condition；When the current suction superheat angle value is more than or equal to the setting suction superheat
During the maximum of angle value scope, the throttle mechanism is controlled to be in the 3rd working condition.
Further, when the current suction superheat angle value continuously acquired in first time period is in the setting
When in the range of suction superheat angle value, the throttle mechanism is controlled according to the current pressure difference；When connecting in second time period
When the continuous current suction superheat obtained is respectively less than the minimum value for being equal to the setting suction superheat angle value scope, institute is controlled
State throttle mechanism and be in first working condition；When the current suction superheat angle value continuously acquired within the 3rd period
When being all higher than being equal to the maximum of the setting suction superheat angle value scope, the throttle mechanism is controlled to be in the described 3rd work
State.
Based on the control method of throttle mechanism provided by the invention, refrigeration system and refrigeration system, throttle mechanism has the
One cold-producing medium stream port and second refrigerant communication port and including main throttling arrangement, auxiliary throttling arrangement and control device, throttle machine
Structure has the first working condition and the second working condition, and in the first working condition, control device control is circulated from the first refrigerant
The refrigerant that mouth enters throttle mechanism flow to the second refrigerant communication port by main throttling arrangement；In the second working condition,
Control device control enters main throttling arrangement and auxiliary section of the refrigerant of throttle mechanism by series connection from the first cold-producing medium stream port
Stream device flow to second refrigerant communication port.When the throttle mechanism of the present invention is used for refrigeration system, high pressure is in refrigeration system
Throttle mechanism can be controlled to be in the second working condition so that the condensed refrigerant of condenser first passes through auxiliary section during poor operating mode
Flow device and carry out once its pressure of throttling reduction, then throttled again by main throttling arrangement, so as to improve in the prior art
Refrigeration system only by expansion valve carry out once throttling existing for noise it is larger the problem of.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the refrigeration system of the embodiment of the present invention.
Each reference represents respectively：
1- compressors；2- condensers；3- throttle mechanisms；31- main expansion valves；32- capillaries；The on-off control valves of 33- first；
The on-off control valves of 34- second；The on-off control valves of 35- the 3rd；4- evaporators；5- reservoirs；6- devices for drying and filtering；7- plate-type heat-exchanges
Device；8- expansion valves；9- magnetic valves.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Below
Description only actually at least one exemplary embodiment is illustrative, is never used as to the present invention and its application or makes
Any restrictions.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Unless specifically stated otherwise, the part and positioned opposite, the digital table of step otherwise illustrated in these embodiments
Do not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for the ease of description, each portion shown in accompanying drawing
The size divided not is to be drawn according to the proportionate relationship of reality.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, the technology, method and apparatus should be considered as authorizing explanation
A part for book.In shown here and discussion all examples, any occurrence should be construed as merely exemplary, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar label
Similar terms is represented in following accompanying drawing with letter, therefore, once it is defined in a certain Xiang Yi accompanying drawing, then subsequent attached
It need not be further discussed in figure.
For the ease of description, space relative terms can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure
Outside different azimuth in use or operation.For example, if the device in accompanying drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and
And respective explanations are made to the relative description in space used herein above.
With reference to shown in figure 1, the throttle mechanism 3 of the embodiment of the present invention has the first cold-producing medium stream port FI and second refrigerant
Communication port FO and including main throttling arrangement, auxiliary throttling arrangement and control device.Throttle mechanism has the first working condition and second
Working condition, in the first working condition, the refrigerant that control device control enters throttle mechanism from the first cold-producing medium stream port leads to
Cross main throttling arrangement and flow to second refrigerant communication port；In the second working condition, control device enters from the first cold-producing medium stream port
The refrigerant for entering throttle mechanism flow to second refrigerant communication port by the main throttling arrangement and auxiliary throttling arrangement of series connection.
When the throttle mechanism of the embodiment of the present invention is used for refrigeration system, it can be controlled when refrigeration system is in High Pressure Difference operating mode
Throttle mechanism 3 processed is in the second working condition so that the condensed refrigerant of condenser first passes through auxiliary throttling arrangement and carried out once
Throttling reduces its pressure, is then throttled again by main throttling arrangement, that is to say, that the throttle mechanism pair of the embodiment of the present invention
Refrigerant, which carries out throttling step by step, gradually reduces its pressure, only enters so as to improve refrigeration system of the prior art by expansion valve
The problem of noise existing for once throttling of going is larger.It can be controlled when refrigeration system is in normal pressure difference operating mode at throttle mechanism
The condensed refrigerant of condenser is set only to carry out the normal regulating refrigerant that throttles by main throttling arrangement in the first working condition
Quantity delivered.To sum up, the throttle mechanism of the embodiment of the present invention improves the existing section of throttling arrangement of refrigeration system of the prior art
The problem of flow noise is larger.
The control method of the refrigeration system of the embodiment of the present invention, comprises the following steps：
Obtain the current pressure between the current suction superheat angle value of compressor and the pressure at expulsion and pressure of inspiration(Pi) of compressor
Power difference；
According to current suction superheat angle value and current pressure difference control throttle mechanism whether in the first working condition or
Whether the second working condition is in.
The refrigeration system of the present embodiment has setting suction superheat angle value scope and set pressure differential value.Current suction superheat
Whether throttle mechanism is controlled in the first work according to current pressure difference when angle value is in the range of setting suction superheat angle value
Whether state is in the second working condition.
Specifically, if current pressure difference is less than set pressure differential value, control throttle mechanism is in the first working condition；If
Current pressure difference is not less than set pressure differential value, and control throttle mechanism is in the second working condition.
The control method of the refrigeration system of the embodiment of the present invention can be according to the current working of refrigeration system to throttle mechanism
Working condition be controlled, so as to realize throttling noise reduction.
Below according to the structures of throttle mechanism of the Fig. 1 to a specific embodiment of the invention and the structure of refrigeration system and control
Method processed is described in detail.
In the present embodiment, refrigeration system is container refrigeration system.
As shown in figure 1, in the present embodiment, refrigeration system includes compressor 1, condenser 2, the throttle mechanism being sequentially connected
3 and evaporator 4.
Throttle mechanism 3 includes the first cold-producing medium stream port FI, second refrigerant communication port FO and is arranged at the first refrigeration
Main throttling arrangement and auxiliary throttling arrangement between agent communication port FI and second refrigerant communication port FO.Specifically in the present embodiment,
Main throttling arrangement is main expansion valve 31, and auxiliary throttling arrangement is capillary 32.Certainly, in the unshowned embodiment of other accompanying drawings,
Main throttling arrangement can also be capillary, and auxiliary throttling arrangement can be expansion valve.
Main expansion valve 31 has first port and second port.The second port of main expansion valve 31 circulates with second refrigerant
Mouth FO connections.Throttle mechanism 3 includes the be arranged between the first cold-producing medium stream port FI and the first port of main expansion valve 31
One stream and second flow path.Capillary 32 is arranged in second flow path.In the first working condition, control device control first flow path
Connection and second flow path disconnection.In the second working condition, control device control first flow path disconnects and second flow path connects.
Specifically, control device includes the first on-off valve 33 being arranged in first flow path and is arranged in second flow path
Second on-off valve 34.In the first working condition, the first on-off valve 33 of control is in connected state and controls the second on-off valve 34
It is off so that the first cold-producing medium stream port FI is connected by first flow path with the first port of main expansion valve 31.
During the second working condition, control the second on-off valve 34 be in connected state and control the first on-off valve 33 be off so that
The first cold-producing medium stream port FI is set to be connected by second flow path with the first port of main expansion valve 31.
Specifically in the present embodiment, the first port of capillary 32 connects with the first cold-producing medium stream port, the second on-off valve
34 are arranged between the second port of capillary 32 and the first port of main expansion valve 31.
In a unshowned embodiment of accompanying drawing, the second port of capillary 32 connects with main expansion valve 31, now, control
Device processed can include the on-off valve being arranged between the first port of capillary 32 and the first cold-producing medium stream port.Control device
Reversal valve can also be included.The import of reversal valve connects with the first cold-producing medium stream port FI, and the first outlet of reversal valve and master are swollen
The first port connection of swollen valve 31, the second outlet of reversal valve connect with capillary 32.Reversal valve has first position and second
Position, in first position, the import of reversal valve connects with first outlet, now the of the first cold-producing medium stream port and main expansion valve
Single port connects；In the second place, the import of reversal valve connects with second outlet, and now the first cold-producing medium stream port passes through capillary
Pipe 32 connects with the first port of main expansion valve 31 to be throttled so as to reduce throttling noise step by step with realizing.
Preferably, the throttle mechanism of the present embodiment also has the 3rd working condition.In the 3rd working condition, freeze from first
The refrigerant that agent communication port enters throttle mechanism flow to second refrigerant communication port by main expansion valve and capillary respectively.At this
When the degree of superheat of the refrigeration system of embodiment is higher, throttle mechanism can be controlled to be in the 3rd working condition so that condenser is cold
Refrigerant liquid after solidifying enters evaporator together by capillary and main expansion valve, so that refrigeration system feed flow is sufficient, protects
Demonstrate,prove refrigerating capacity.
Specifically in the present embodiment, the first port of capillary 32 connects with the first cold-producing medium stream port.Throttle mechanism is also
Including the 3rd stream being arranged between the second port of capillary 32 and second refrigerant communication port.In the first working condition
When, control device control first flow path connects and the 3rd stream of control disconnects；In three working conditions, control device control the
One fluid communication and the 3rd fluid communication of control.
Specifically, the control device of the present embodiment also includes the second port and second refrigerant stream for being arranged at capillary 32
The 3rd on-off valve 35 between port.It is more than or equal to setting suction superheat angle value model in the current suction superheat angle value of refrigeration system
During the maximum enclosed, the second on-off valve 34 of control is off, and controls the first on-off valve 33 and the 3rd on-off valve 35 equal
In connected state so that first flow path connects with the 3rd stream.Now refrigerant passes through capillary 32 and main expansion valve 31
Evaporator is flow to jointly, so as to which the liquid supply rate of evaporator be effectively ensured.
Preferably, the refrigeration system of the present embodiment also includes detection means.Detection means is used for the suction for obtaining refrigeration system
Atmospheric pressure P0, pressure at expulsion Pe and suction temperature T0.
The control method of the refrigeration system of the present embodiment, comprises the following steps：
Obtain working as between the current suction superheat angle value of compressor and the pressure at expulsion Pe and pressure of inspiration(Pi) P0 of compressor
Preceding pressure difference value；
According to current suction superheat angle value and current pressure difference control throttle mechanism whether in the first working condition or
Whether the second working condition.
Specifically, whether throttle mechanism is controlled in the first work according to current suction superheat angle value and current pressure difference
Whether state includes in the second working condition：
Controlled and saved according to current pressure difference when current suction superheat angle value is in the range of setting suction superheat angle value
Whether stream mechanism is in the first working condition or whether is in the second working condition.
It is specific as follows：If current pressure difference is less than set pressure differential value, control refrigeration system is in the first working condition；
If current pressure difference is not less than set pressure differential value, control throttle mechanism is in the second working condition.
Specifically in the present embodiment, if current pressure difference is less than set pressure differential value, the first on-off control valve 33 is controlled
Connection, the second on-off control valve 34 and the 3rd on-off control valve 35 are disconnected, and now refrigerant is only entered by main expansion valve 31 and steamed
Send out device, because now the small refrigeration system feed flow of pressure difference is normal, main expansion valve 31 can normal regulating refrigerant quantity delivered, refrigeration system
Unite stable.If current pressure difference is not less than set pressure differential value, the first on-off control valve and the control of the 3rd break-make are controlled
Valve disconnects, and controls the second on-off control valve 34 to connect, and now the condensed refrigerant liquid of condenser first passes through capillary and entered
Once throttling reduces its pressure to row, is then produced again by main expansion valve so as to reduce when refrigerant liquid passes through main expansion valve
Noise.
When current suction superheat angle value is not at setting in the range of suction superheat angle value, control method is as follows:Current
When suction superheat angle value is less than or equal to the minimum value of setting suction superheat angle value scope, control throttle mechanism is in the first work shape
State；When current suction superheat angle value is more than or equal to the maximum of setting suction superheat angle value scope, control throttle mechanism is in
3rd working condition.
If current suction superheat angle value is more than or equal to the maximum of setting suction superheat angle value scope, the first break-make control is controlled
Valve 33 processed connects with the 3rd on-off control valve 35 and controls the second on-off control valve 34 to disconnect, so that the refrigeration of condenser output
Agent liquid enters evaporator together by main expansion valve and capillary, and the refrigeration of refrigeration system is enough to ensure that so as to ensure that feed flow fills
Ability.If current suction superheat angle value is less than or equal to the minimum value of setting suction superheat angle value scope, the first break-make control is controlled
Valve 33 processed connects and controls the second on-off control valve 34 and the 3rd on-off control valve 35 disconnects so that refrigeration system leans on main expansion
Valve controls.
Preferably, when the current suction superheat angle value that refrigeration system continuously continuously acquires in first time period is in setting
Determine in the range of suction superheat angle value, the working condition of throttle mechanism is controlled according to current pressure difference.
Inhaled when the current suction superheat angle value that refrigeration system continuously continuously acquires in second time period is less than or equal to setting
The minimum value of gas super heat value scope, then the first on-off control valve 33 is controlled to connect and control the second on-off control valve 34 and the 3rd
On-off control valve 35 disconnects so that refrigeration system controls by main expansion valve.
When the current suction superheat that refrigeration system continuously continuously acquires within the 3rd period is more than or equal to setting air-breathing
The maximum of super heat value scope, the first on-off control valve 33 of control connect with the 3rd on-off control valve 35 and control the second break-make
Control valve 34 disconnects, so that the refrigerant liquid of condenser output enters evaporator together by main expansion valve and capillary,
The refrigerating capacity of refrigeration system is enough to ensure that so as to ensure that feed flow fills.
Specifically in the present embodiment, first time period is 1 minute, and second time period and the 3rd period are 10 minutes.
To sum up, the control method of the refrigeration system of the present embodiment is using the decision condition of current suction superheat angle value as preferential bar
Part.Controlled and saved according to current suction superheat angle value when current suction superheat angle value is not at setting in the range of suction superheat angle value
Stream mechanism is in the first working condition or the 3rd working condition.Setting suction superheat angle value model is in current suction superheat angle value
Throttle mechanism is controlled to be in the first working condition or the second working condition according to current pressure difference when enclosing interior.
As shown in figure 1, the refrigeration system of the present embodiment also includes second vapor injection device.Second vapor injection device includes board-like change
Hot device 7, expansion valve 8 and magnetic valve 9.Compressor 1 has gas supplementing opening.Magnetic valve 9 is opened when compressor needs tonifying Qi makes part
The refrigerant liquid of HTHP carries out the refrigerant liquid of reducing pressure by regulating flow formation low-temp low-pressure by expansion valve 8, and this part is low
The refrigerant liquid of warm low pressure carries out heat exchange by the refrigerant liquid of plate type heat exchanger 7 and HTHP again and forms low-temp low-pressure
Refrigerant gas enter compressor gas supplementing opening to compressor carry out tonifying Qi.
The refrigeration system of the present embodiment also includes the reservoir 5 being arranged between condenser 2 and second vapor injection device and done
Dry filter 6.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (14)
1. a kind of throttle mechanism, it is characterised in that the throttle mechanism has the first cold-producing medium stream port and second refrigerant stream
Port and there is the first working condition and second including main throttling arrangement, auxiliary throttling arrangement and control device, the throttle mechanism
Working condition, in first working condition, the control device control enters the section from the first cold-producing medium stream port
The refrigerant of stream mechanism flow to the second refrigerant communication port by the main throttling arrangement；In second working condition,
The refrigerant that the control device control enters the throttle mechanism from the first cold-producing medium stream port passes through described in series connection
Main throttling arrangement and the auxiliary throttling arrangement flow to the second refrigerant communication port.
2. throttle mechanism according to claim 1, it is characterised in that the main throttling arrangement has first port and second
Port, the throttle mechanism (3) also include the first end for being arranged at the first cold-producing medium stream port and the main throttling arrangement
First flow path and second flow path between mouthful, the auxiliary throttling arrangement are arranged in the second flow path, the main throttling arrangement
Second port connected with the second refrigerant communication port, in first working condition, described in the control device control
First flow path connects and controls the second flow path to disconnect；In second working condition, the control device control described the
One stream disconnects and controls the second flow path to connect.
3. throttle mechanism according to claim 2, it is characterised in that the control device is described first-class including being arranged at
To control the first on-off valve (33) of the break-make of the first flow path and be arranged in the second flow path with described in control on road
The second on-off valve (34) of the break-make of second flow path.
4. throttle mechanism according to claim 3, it is characterised in that second on-off valve (34) is arranged at the main section
Between the first port and the auxiliary throttling arrangement that flow device.
5. throttle mechanism according to claim 4, it is characterised in that the control device also includes being arranged at the auxiliary section
Flow the 3rd on-off valve (35) between device and the second refrigerant communication port.
6. throttle mechanism according to claim 1, it is characterised in that the main throttling arrangement includes expansion valve or capillary
Pipe；And/or the auxiliary throttling arrangement includes expansion valve or capillary.
7. throttle mechanism according to any one of claim 1 to 6, it is characterised in that the throttle mechanism also has the
Three working conditions, in the 3rd working condition, the control device control is from described in the first cold-producing medium stream port entrance
The refrigerant of throttle mechanism flows to the second refrigerant by the main throttling arrangement and the auxiliary throttling arrangement respectively and circulated
Mouthful.
8. the throttle mechanism according to any one of claim 2 to 6, it is characterised in that the throttle mechanism also has the
Three working conditions, in the 3rd working condition, the control device control is from described in the first cold-producing medium stream port entrance
The refrigerant of throttle mechanism flows to the second refrigerant by the main throttling arrangement and the auxiliary throttling arrangement respectively and circulated
Mouthful, the auxiliary throttling arrangement has first port and second port, the first port of the auxiliary throttling arrangement and the described first system
Cryogen communication port connects, and the throttle mechanism also includes the second port and the described second refrigeration for being arranged at the auxiliary throttling arrangement
The 3rd stream between agent communication port, in first working condition, the control device controls the 3rd stream to disconnect；
3rd working condition, the control device control the first flow path connection and control the 3rd fluid communication.
9. a kind of refrigeration system, it is characterised in that including appointing in the compressor, condenser, such as claim 1 to 8 that are sequentially connected
Throttle mechanism and evaporator described in one, the first cold-producing medium stream port connect with the condenser, second refrigeration
Agent communication port connects with the evaporator.
10. refrigeration system according to claim 9, it is characterised in that the refrigeration system includes container refrigeration system.
11. a kind of control method of the refrigeration system based on described in claim 9 or 10, it is characterised in that comprise the following steps：
Obtain working as between the current suction superheat angle value of the compressor and the pressure at expulsion and pressure of inspiration(Pi) of the compressor
Preceding pressure difference value；
Whether the throttle mechanism is controlled in described the according to the current suction superheat angle value and the current pressure difference
Whether one working condition is in second working condition.
12. the control method of refrigeration system according to claim 11, it is characterised in that the refrigeration system has setting
Suction superheat angle value scope and set pressure differential value, controlled according to the current suction superheat angle value and the current pressure difference
The throttle mechanism whether is in first working condition or whether second working condition includes：
When the current suction superheat angle value is in the range of the setting suction superheat angle value,
If the current pressure difference is less than the set pressure differential value, the throttle mechanism is controlled to be in the described first work shape
State；If the current pressure difference is not less than the set pressure differential value, the throttle mechanism is controlled to be in the described second work
State.
13. the control method of refrigeration system according to claim 11, it is characterised in that the throttle mechanism also has the
Three working conditions, in the 3rd working condition, the refrigerant of the throttle mechanism is entered from the first cold-producing medium stream port
The second refrigerant communication port is flowed to by the main throttling arrangement and the auxiliary throttling arrangement respectively, the control method is also
Including：
When the current suction superheat angle value is less than or equal to the minimum value of the setting suction superheat angle value scope, described in control
Throttle mechanism is in first working condition；When the current suction superheat angle value is more than or equal to the setting suction superheat
When being worth the maximum of scope, the throttle mechanism is controlled to be in the 3rd working condition.
14. the control method of refrigeration system according to claim 13, it is characterised in that when continuous in first time period
When the current suction superheat angle value obtained is in the range of the setting suction superheat angle value, according to the current pressure
Difference controls the throttle mechanism；It is equal to institute when the current suction superheat continuously acquired in second time period is respectively less than
When stating the minimum value of setting suction superheat angle value scope, the throttle mechanism is controlled to be in first working condition；When
The current suction superheat angle value continuously acquired in three periods is all higher than being equal to the setting suction superheat angle value scope
During maximum, the throttle mechanism is controlled to be in the 3rd working condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873598.9A CN107477928B (en) | 2017-09-25 | 2017-09-25 | Throttle mechanism, refrigerating system and control method of refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873598.9A CN107477928B (en) | 2017-09-25 | 2017-09-25 | Throttle mechanism, refrigerating system and control method of refrigerating system |
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| CN107477928A true CN107477928A (en) | 2017-12-15 |
| CN107477928B CN107477928B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710873598.9A Active CN107477928B (en) | 2017-09-25 | 2017-09-25 | Throttle mechanism, refrigerating system and control method of refrigerating system |
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| JPH02290471A (en) * | 1989-02-10 | 1990-11-30 | Mitsubishi Electric Corp | Air-conditioner |
| JPH08121879A (en) * | 1994-10-26 | 1996-05-17 | Mitsubishi Heavy Ind Ltd | Refrigerating and air conditioning apparatus |
| CN1190723A (en) * | 1997-02-11 | 1998-08-19 | 三星电子株式会社 | Power changeable air conditioner |
| CN1995875A (en) * | 2006-01-05 | 2007-07-11 | 松下电器产业株式会社 | Variable-capacity air conditioner |
| CN202973686U (en) * | 2012-12-19 | 2013-06-05 | 海信（山东）空调有限公司 | Throttling device of variable frequency air conditioner and air conditioner |
| CN103322681A (en) * | 2013-07-08 | 2013-09-25 | 浙江正理生能科技有限公司 | Heat-pump water heater cold shielding system for protecting compressor |
| CN106546039A (en) * | 2017-02-06 | 2017-03-29 | 刘勇 | Suitable for the carbon dioxide heat-pump expansion throttling device and heat pump under weather of extremely trembling with fear |
| CN207407553U (en) * | 2017-09-25 | 2018-05-25 | 珠海格力电器股份有限公司 | throttle mechanism and refrigeration system |
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2017
- 2017-09-25 CN CN201710873598.9A patent/CN107477928B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02290471A (en) * | 1989-02-10 | 1990-11-30 | Mitsubishi Electric Corp | Air-conditioner |
| JPH08121879A (en) * | 1994-10-26 | 1996-05-17 | Mitsubishi Heavy Ind Ltd | Refrigerating and air conditioning apparatus |
| CN1190723A (en) * | 1997-02-11 | 1998-08-19 | 三星电子株式会社 | Power changeable air conditioner |
| CN1995875A (en) * | 2006-01-05 | 2007-07-11 | 松下电器产业株式会社 | Variable-capacity air conditioner |
| CN202973686U (en) * | 2012-12-19 | 2013-06-05 | 海信（山东）空调有限公司 | Throttling device of variable frequency air conditioner and air conditioner |
| CN103322681A (en) * | 2013-07-08 | 2013-09-25 | 浙江正理生能科技有限公司 | Heat-pump water heater cold shielding system for protecting compressor |
| CN106546039A (en) * | 2017-02-06 | 2017-03-29 | 刘勇 | Suitable for the carbon dioxide heat-pump expansion throttling device and heat pump under weather of extremely trembling with fear |
| CN207407553U (en) * | 2017-09-25 | 2018-05-25 | 珠海格力电器股份有限公司 | throttle mechanism and refrigeration system |
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| Publication number | Publication date |
|---|---|
| CN107477928B (en) | 2023-08-22 |
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