CN108826724A - Refrigeration unit, refrigeration equipment and refrigeration unit control method - Google Patents
Refrigeration unit, refrigeration equipment and refrigeration unit control method Download PDFInfo
- Publication number
- CN108826724A CN108826724A CN201810317027.1A CN201810317027A CN108826724A CN 108826724 A CN108826724 A CN 108826724A CN 201810317027 A CN201810317027 A CN 201810317027A CN 108826724 A CN108826724 A CN 108826724A
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- Prior art keywords
- evaporator
- pipeline
- refrigeration unit
- condenser
- refrigeration
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003507 refrigerant Substances 0.000 claims description 26
- 230000008676 import Effects 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 description 8
- 238000001035 drying Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000010257 thawing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
-
- 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
-
- 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
-
- 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
- F25B47/02—Defrosting cycles
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The present invention provides a kind of refrigeration unit, refrigeration equipment and refrigeration unit control method, refrigeration units to include：First evaporator；Second evaporator, the second evaporator and the first evaporator interval are arranged；Wherein, the second evaporator can be used for carrying out defrost to the second evaporator and the first evaporator.Refrigeration unit of the invention solves the problems, such as that refrigeration unit in the prior art exports during defrost without cooling capacity.
Description
Technical field
The present invention relates to refrigerating fields, in particular to a kind of refrigeration unit, refrigeration equipment and refrigeration unit controlling party
Method.
Background technique
Refrigerating machine of refrigerated truck group is a kind of extraordinary refrigeration machine mobile with vehicle applied to perishable perishable commodity, is vehicle
Compartment space creation simultaneously maintains -20 DEG C -10 DEG C required of temperature to provide cooling capacity.In this temperature range, the evaporation of refrigeration unit
Temperature often causes heat exchange surface to be blocked hereinafter, condensed water is easy at 0 DEG C in evaporator surface frosting, further fast prompt drop
Low evaporating temperature, frosting deteriorate.
After commonly technological means is by sensing that the surface temperature of evaporator copper pipe is reduced to a certain temperature, using four
Port valve commutation, the reverse hot gas defrosting of refrigerant.This method exports during defrost without cooling capacity, is easy to cause high temperature in compartment
Fluctuation, four-way valve moment switching refrigerant is bigger to the impact of system when flowing to, and reduces the reliability of system, and have four
The pipe-line system of port valve easily becomes the weak spot of vibrating fatigue in the automotive environment.
Summary of the invention
The main purpose of the present invention is to provide a kind of refrigeration unit, refrigeration equipment and refrigeration unit control methods, with solution
The problem of refrigeration unit certainly in the prior art exports during defrost without cooling capacity.
To achieve the goals above, according to the first aspect of the invention, a kind of refrigeration unit is provided, including：First
Evaporator；Second evaporator, the second evaporator and the first evaporator interval are arranged；Wherein, the second evaporator can be used for second
Evaporator and the first evaporator carry out defrost.
Further, refrigeration unit further includes：Compressor；Condenser, the outlet of compressor are connected with the import of condenser
It is logical；Wherein, the outlet of condenser is connected to the first evaporator and the second evaporator.
Further, refrigeration unit further includes：First pipeline, the setting of the first pipeline condenser and the second evaporator it
Between；Second pipeline, the second pipeline are arranged between condenser and the second evaporator；First expansion valve, the setting of the first expansion valve exist
On first pipeline；Wherein, the first pipeline is arranged in parallel with the second pipeline, and the first pipeline and the second pipeline can be arranged to on-off.
Further, when the first pipeline connection, when the second pipeline disconnects, the second evaporator refrigeration；When the first pipeline disconnect,
When the second pipeline connection, the second evaporator defrost.
Further, the first expansion valve is electric expansion valve.
Further, refrigeration unit further includes：Switching control pilot, switching control pilot are arranged on the second pipeline.
Further, refrigeration unit further includes：Heat exchanger, heat exchanger setting are formed between compressor and the second evaporator
Circulation line on.
Further, heat exchanger has first passage and second channel, one end of first passage and the outlet phase of condenser
Connection, the other end of first passage are connected with the import of the second evaporator；One end of second channel goes out with the second evaporator
Mouth is connected, and the other end of first passage is connected with the import of compressor.
Further, refrigeration unit further includes：Second expansion valve, the second expansion valve are arranged in condenser and the first evaporator
Between pipeline on.
Further, refrigeration unit further includes：Gas-liquid separator, the import of gas-liquid separator and the first evaporator and second
Evaporator is connected to, and the outlet of gas-liquid separator is connected with the import of compressor.
Further, refrigeration unit further includes：The air outlet of first blower, the first blower is arranged towards the second evaporator,
Second evaporator is arranged between the first blower and the first evaporator.
Further, the first evaporator and the second evaporator are finned heat exchanger, the adjacent two panels wing of the first evaporator
Spacing between piece is less than the spacing between the adjacent two panels fin of the second evaporator.
According to the second aspect of the invention, a kind of refrigeration equipment, including refrigeration unit are provided, refrigeration unit is above-mentioned
Refrigeration unit.
According to the third aspect of the present invention, a kind of refrigeration unit control method is provided, including：It controls cold through condenser
Refrigerant after solidifying enters the first evaporator, the first evaporator refrigeration；Control each pipe between condenser and the second evaporator
The on-off on road so that through the condensed refrigerant of condenser alternatively through the pipeline crossed between condenser and the second evaporator into
Enter the second evaporator, to realize the refrigeration or defrost of the second evaporator.
Further, there is the first pipeline and the second pipeline, the first pipeline and second between condenser and the second evaporator
Pipeline is arranged in parallel, and the first pipeline and the second pipeline can be arranged to on-off, and the first expansion valve is provided on the first pipeline；When
One pipeline connection, when the second pipeline disconnects, the second evaporator refrigeration；When the first pipeline disconnection, the second pipeline connection, second steams
Send out device defrost.
Further, refrigeration unit control method further includes：According to the temperature of the inlet tube of the second evaporator, control first
The on-off of pipeline and the second pipeline.
Further, when the second evaporator refrigeration, by adjust the first expansion valve aperture, make the second evaporator into
The temperature of mouth pipe is maintained between 0 DEG C -5 DEG C.
Further, refrigeration unit control method further includes：According to indoor temperature, adjust the running frequency of compressor with
And first blower wind speed；Wherein, the air outlet of the first blower is arranged towards the second evaporator, the second evaporator in the first blower
Between the first evaporator.
Refrigeration unit of the invention is by being provided with the first evaporator and the second evaporator can be realized refrigeration and defrost
It is synchronous to carry out.Wherein, the second evaporator and the first evaporator interval are arranged.In refrigeration unit operational process, the first evaporator
It is constantly in normal refrigerating state, when not needing to carry out defrost, the second evaporator carries out normal refrigerating operaton, works as needs
When carrying out defrost, the second evaporator starts defrost, at this point, since the first evaporator is constantly in normal refrigerating state, therefore, room
It is inside constantly in refrigerating state, solves the problems, such as that refrigeration unit in the prior art exports during defrost without cooling capacity.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings：
Fig. 1 shows the system principle schematic diagram of refrigeration unit according to the present invention.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, the first evaporator；20, the second evaporator；30, compressor；40, condenser；50, the first expansion valve；60, it switchs
Control valve；70, the first pipeline；80, the second pipeline；90, heat exchanger；100, the second expansion valve；110, gas-liquid separator；120,
One blower；130, device for drying and filtering；140, liquid-sighting glass；150, the first check valve；160, second one-way valve；170, the second blower.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
The present invention provides an a kind of refrigeration unit, referring to FIG. 1, refrigeration unit includes：First evaporator 10；Second steams
Device 20 is sent out, the second evaporator 20 and the first evaporator 10 interval are arranged；Wherein, the second evaporator 20 can be used for the second evaporator
20 and first evaporator 10 carry out defrost.
Refrigeration unit of the invention can be realized refrigeration and change by being provided with the first evaporator 10 and the second evaporator 20
The synchronous of frost carries out.Wherein, the second evaporator 20 and the first evaporator 10 interval are arranged.In refrigeration unit operational process, the
One evaporator 10 is constantly in normal refrigerating state, and when not needing to carry out defrost, the second evaporator 20 is normally made
Cold operation, when needing to carry out defrost, the second evaporator 20 starts defrost, at this point, since the first evaporator 10 is constantly in just
Normal refrigerating state, therefore, interior is constantly in refrigerating state, solves refrigeration unit in the prior art during defrost without cold
The problem of amount output.
In order to realize the refrigerating function of the first evaporator 10 and the second evaporator 20, as shown in Figure 1, refrigeration unit is also
Including：Compressor 30；The outlet of condenser 40, compressor 30 is connected with the import of condenser 40；Wherein, condenser 40 go out
Mouth is connected to the first evaporator 10 and the second evaporator 20.
In the present embodiment, by being provided with compressor 30 and condenser 40 in refrigeration unit, wherein compressor 30
Outlet is connected with the import of condenser 40, and the outlet of condenser 40 is connected to the first evaporator 10 and the second evaporator 20.
In refrigerant after compressor compresses are handled, by condenser 40, subsequently into the first evaporator 10 and the second evaporator 20.
To realize the refrigerating function of the first evaporator 10 and the refrigeration or defrosting function of the second evaporator 20.
In order to make the second evaporator 20 realize refrigeration or defrosting function, as shown in Figure 1, refrigeration unit further includes：
First pipeline 70, the first pipeline 70 are arranged between condenser 40 and the second evaporator 20；Second pipeline 80, the second pipeline 80 are set
It sets between condenser 40 and the second evaporator 20；First expansion valve 50, the first expansion valve 50 are arranged on the first pipeline 70；Its
In, the first pipeline 70 is arranged in parallel with the second pipeline 80, and the first pipeline 70 and the second pipeline 80 can be arranged to on-off.
In the present embodiment, by being provided with the first pipeline 70, the second pipeline 80 and the first expansion in refrigeration unit
Valve 50, wherein the first pipeline 70 is arranged between condenser 40 and the second evaporator 20, and the second pipeline 80 is arranged in condenser 40
Between the second evaporator 20, the first expansion valve 50 is arranged on the first pipeline 70.
In the present embodiment, the first pipeline 70 is arranged in parallel with the second pipeline 80, and the first pipeline 70 and the second pipeline 80 are
Can on-off it be arranged, in refrigeration unit operational process, by adjusting the on-off of the first pipeline 70 and the second pipeline 80, so as to
To realize the refrigeration of the second evaporator 20 or the switching of defrost.
The carrying out practically process of refrigeration or defrost for the second evaporator 20, when the connection of the first pipeline 70, the second pipeline
When 80 disconnection, the second evaporator 20 refrigeration；When the first pipeline 70 disconnects, and the second pipeline 80 is connected to, 20 defrost of the second evaporator.
In the present embodiment, when the first pipeline 70 is connected to, and the second pipeline 80 disconnects, refrigerant passes through the first expansion valve 50
Into the second evaporator 20, the second evaporator 20 refrigeration；When the first pipeline 70 disconnects, and the second pipeline 80 is connected to, refrigerant is logical
It crosses the second pipeline 80 and enters the second evaporator 20,20 defrost of the second evaporator.
Preferably, the first expansion valve 50 is electric expansion valve.
In order to control the on-off of the second pipeline 80, as shown in Figure 1, refrigeration unit further includes：Switching control pilot 60, is opened
Control valve 60 is closed to be arranged on the second pipeline 80.
In the present embodiment, by being provided with switching control pilot 60 in refrigeration unit, wherein switching control pilot 60 is arranged
On the second pipeline 80.When switching control pilot 60 is opened, the first pipeline 70 is disconnected, and the second pipeline 80 connection, refrigerant passes through
Second pipeline 80 enters the second evaporator 20,20 defrost of the second evaporator.When switching control pilot 60 is closed, the first pipeline 70 connects
Logical, the second pipeline 80 disconnects, and refrigerant enters the second evaporator 20, the second evaporator 20 refrigeration by the first expansion valve 50.
Preferably, switching control pilot 60 is solenoid valve.
In view of after the heat exchange of the second evaporator 20, refrigerant at this time is relative to the refrigerant temperature come out from condenser 40
Degree is lower, in order to make full use of this part of cooling capacity, as shown in Figure 1, refrigeration unit further includes：Heat exchanger 90, heat exchanger
90 are arranged on the circulation line formed between compressor 30 and the second evaporator 20.
In the present embodiment, by being provided with heat exchanger 90 in refrigeration unit, wherein heat exchanger 90 is arranged in compressor
30 and second on the circulation line that is formed between evaporator 20 so that the refrigerant come out from condenser 40 with from the
The refrigerant come out in two evaporators 20 exchanges heat.
Preferably, heat exchanger 90 has first passage and second channel, one end of first passage and the outlet of condenser 40
It is connected, the other end of first passage is connected with the import of the second evaporator 20；One end of second channel and the second evaporator
20 outlet is connected, and the other end of first passage is connected with the import of compressor 30.
Optionally, refrigeration unit further includes：Heat exchanger 90, the setting of heat exchanger 90 compressor 30 and the first evaporator 10 it
Between on the circulation line that is formed.
Optionally, refrigeration unit further includes：Heat exchanger 90, the setting of heat exchanger 90 compressor 30 and the first evaporator 10 it
Between on the circulation line that is formed, and/or, the circulation pipe formed between compressor 30 and the second evaporator 20 is arranged in heat exchanger 90
On the road.
In order to realize the refrigeration of the first evaporator 10, as shown in Figure 1, refrigeration unit further includes：Second expansion valve
100, the second expansion valve 100 is arranged on the pipeline between condenser 40 and the first evaporator 10.
In the present embodiment, by being provided with the second expansion valve 100 in refrigeration unit, wherein the second expansion valve 100 is set
It sets on the pipeline between condenser 40 and the first evaporator 10, the refrigerant come out from condenser 40 passes through the second expansion valve
100 exchange heat into the first evaporator 10.
Preferably, refrigeration unit further includes：Gas-liquid separator 110, the import of gas-liquid separator 110 and the first evaporator 10
It is connected to the second evaporator 20, the outlet of gas-liquid separator 110 is connected with the import of compressor 30.
In order to defrost also be carried out to the first evaporator 10, such as Fig. 1 institute when the second evaporator 20 is in defrost state
Show, refrigeration unit further includes：The air outlet of first blower 120, the first blower 120 is arranged towards the second evaporator 20, and second steams
Device 20 is sent out to be arranged between the first blower 120 and the first evaporator 10.
In the present embodiment, by being provided with the first blower 120 in refrigeration unit, pass through going out the first blower 120
Air port is arranged towards the second evaporator 20, when the second evaporator 20 is in defrost state, under the blowing of the first blower 120,
The heat that second evaporator 20 generates can pass through the first evaporator 10, to realize the defrosting to the first evaporator 10.
In the present embodiment, the second evaporator 20 is arranged between the first blower 120 and the first evaporator 10.
Preferably, the first evaporator 10 and the second evaporator 20 are finned heat exchanger, and adjacent the two of the first evaporator 10
Spacing between piece fin is less than the spacing between the adjacent two panels fin of the second evaporator 20.
In the present embodiment, the first check valve 150 is provided on the second pipeline 80, the setting of the first check valve 150 is switching
Between control valve 60 and condenser 40.
In the present embodiment, device for drying and filtering 130, liquid-sighting glass are disposed between condenser 40 and the first evaporator 10
140, wherein device for drying and filtering 130, liquid-sighting glass 140 be all disposed within the second pipeline 80 and condenser 40 and the first evaporator 10 it
Between pipeline connection node before.
In the present embodiment, second one-way valve 160 is provided between compressor 30 and condenser 40.
Refrigeration unit further includes：The air outlet of second blower 170, the second blower 170 is arranged away from condenser 40.
Include for refrigeration unit of the invention：Frequency-changeable compressor 30, condenser 40, device for drying and filtering 130, liquid-sighting glass
140, regenerator (heat exchanger 90), heating power expansion valve (the second expansion valve 100), electric expansion valve (the first expansion valve 50), electromagnetism
Valve (switching control pilot 60), the first evaporator 10, the second evaporator 20, gas-liquid separator 110.
Regeneration path is performed as follows：The gaseous coolant of high temperature and pressure from the exhaust outlet of compressor 30 enter condenser 40 with
Outdoor air becomes normal temperature high voltage liquid refrigerants after being exchanged heat, absorb the moisture in refrigerant by device for drying and filtering 130, pass through
Liquid-sighting glass 140 checks refrigerant state, and refrigerant is divided into two-way here：Pass through the further cooling liquid state refrigerant of regenerator all the way, then
The refrigerant for becoming lower temperature lower pressure after electric expansion valve throttles enters the second evaporator 20, by adequately evaporating
After heat exchange, gas-liquid separator 110 is entered back by regenerator.In addition a-road-through becomes low-temp low-pressure after crossing heating power expansion valve throttling
Refrigerant enter the first evaporator 10, after sufficient evaporation and heat-exchange, into gas-liquid separator 110.
Evaporator is arranged in refrigerated vehicle carriage, and indoor wind first passes through the second evaporator 20, using the first evaporator 10.
Under identical declared working condition, it is contemplated that the exchange capability of heat of the second evaporator 20 is greater than the first evaporator 10, therefore, electronic expansion
The nominal cooling capacity of valve is greater than the nominal cooling capacity of heating power expansion valve.First evaporator 10 and the second evaporator 20 are hydrophilic aluminium foil
Fin copper pipe heat exchanger, but a fin pitch of fins for the second evaporator 20 is slightly larger than a fin pitch of fins for the first evaporator 10, hydrophilic film
Thickness the former be slightly larger than the latter.
The present invention also provides a kind of refrigeration equipment, including refrigeration unit, refrigeration unit is above-mentioned refrigeration unit.
In the present embodiment, refrigeration equipment is refrigerator car or air-conditioning system.
The present invention also provides a kind of refrigeration unit control methods, including：Control is through the condensed refrigerant of condenser 40
Into the first evaporator 10, the first evaporator 10 refrigeration；Control each pipeline between condenser 40 and the second evaporator 20
On-off, so that through the condensed refrigerant of condenser 40 alternatively through the pipeline crossed between condenser 40 and the second evaporator 20
Into the second evaporator 20, to realize the refrigeration or defrost of the second evaporator 20.
In the present embodiment, refrigeration unit control method is applied to above-mentioned refrigeration unit.
Preferably, there is the first pipeline 70 and the second pipeline 80, the first pipeline between condenser 40 and the second evaporator 20
70 are arranged in parallel with the second pipeline 80, and the first pipeline 70 and the second pipeline 80 can be arranged to on-off, and are arranged on the first pipeline 70
There is the first expansion valve 50；When the first pipeline 70 is connected to, and the second pipeline 80 disconnects, the second evaporator 20 refrigeration；When the first pipeline
70 disconnect, when the second pipeline 80 is connected to, 20 defrost of the second evaporator.
Preferably, refrigeration unit control method further includes：According to the temperature of the inlet tube of the second evaporator 20, control first
The on-off of pipeline 70 and the second pipeline 80.
Preferably, when the second evaporator 20 freezes, by adjusting the aperture of the first expansion valve 50, make the second evaporator 20
The temperature of inlet tube be maintained between 0 DEG C -5 DEG C.
Preferably, refrigeration unit control method further includes：According to indoor temperature, adjust the running frequency of compressor 30 with
And first blower 120 wind speed；Wherein, the air outlet of the first blower 120 is arranged towards the second evaporator 20, the second evaporator 20
Between the first blower 120 and the first evaporator 10.
Preferably, the wind speed of the first blower 120, the running frequency of compressor 30 are adjusted according to the running frequency of compressor 30
Higher, the wind speed of the first blower 120 is higher.
For the specific control process of refrigeration unit control method of the invention：
It is switched on the initial stage：When refrigeration unit was switched in 1 hour or temperature is higher than 10 DEG C in compartment, the first blower
120 wind file is automatically set as wind file 1, and the target frequency of compressor operation is A, and solenoid valve (switching control pilot 60), which is in, closes
State.By controlling the aperture of electric expansion valve (the first expansion valve 50), the import tube temperature T of the second evaporator 20 is made to maintain 0
Between DEG C -5 DEG C.
Close to the zero degree stage：If the temperature in compartment is down to 0 DEG C of -10 DEG C of section, the wind file of the first blower 120 is increased
To wind file 2, compressor operational objective frequency is B, if detecting the import tube temperature T of the second evaporator 20 lower than 0 DEG C and≤T1
DEG C when, system is automatically into the defrost stage at this time.
The deep refrigerating stage：If the temperature in compartment is down to -20 DEG C of -0 DEG C of sections, by the wind file liter of the first blower 120
Up to wind file 3, compressor operational objective frequency are C, if detect the import tube temperature T of the second evaporator 20 lower than 0 DEG C and≤
At T1 DEG C, system is automatically into the defrost stage at this time.
The defrost stage：Solenoid valve is first switched into open state, gradually closes electric expansion valve, it is cold using outdoor condenser
Refrigerant after solidifying defrosts to the second evaporator 20, and blower is run by wind file 3, and the operational objective frequency of compressor is D.Second
The import tube temperature T of evaporator 20 be restored to 0 DEG C or more simultaneously >=T2 DEG C when, first electric expansion valve is gradually opened, then again will be electric
Magnet valve switchs to closed state, and the operational objective frequency retrieval of compressor is B.During defrost, the first evaporator 10 is still persistently right
Air in a car compartment freezes, and realizes and does not shut down defrost.
Above-mentioned compressor frequency：A < B < C < D, wind speed：1 < wind file of wind file, 2 < wind file 3, tube temperature T1 < tube temperature T2.
It can be seen from the above description that the above embodiments of the present invention realize following technical effect：
Refrigeration unit of the invention can be realized refrigeration and change by being provided with the first evaporator 10 and the second evaporator 20
The synchronous of frost carries out.Wherein, the second evaporator 20 and the first evaporator 10 interval are arranged.In refrigeration unit operational process, the
One evaporator 10 is constantly in normal refrigerating state, and when not needing to carry out defrost, the second evaporator 20 is normally made
Cold operation, when needing to carry out defrost, the second evaporator 20 starts defrost, at this point, since the first evaporator 10 is constantly in just
Normal refrigerating state, therefore, interior is constantly in refrigerating state, solves refrigeration unit in the prior art during defrost without cold
The problem of amount output.
Refrigeration unit of the invention is opened by being provided with the first evaporator 10 and the second evaporator 20 in the compartment of refrigerator car
Begin the cooling cooling initial stage, the second evaporator 20 is mainly responsible for the latent heat provided in cooling capacity extraction air and dehumidifies, will
Condensed water is as much as possible to be discharged to outdoor；It is cold that first evaporator 10 is mainly responsible for the sensible heat progress provided in cooling capacity extraction air
But, circulating air temperature is further decreased.System is not necessarily to four-way valve, and frosting is effectively delayed even to carry out continuous frostless operation,
Not only compartment cooling velocity can be improved, but also can be to avoid the stopping system in the frequent defrost of refrigeration system after reaching required temperature section
High temperature fluctuation in compartment caused by cold.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that presently filed embodiment described herein for example can be in addition to herein
Sequence other than those of diagram or description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Be to cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units not
Those of be necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for these processes, side
The intrinsic other step or units of method, product or equipment.
For ease of description, spatially relative term 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 understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (18)
1. a kind of refrigeration unit, which is characterized in that including：
First evaporator (10)；
Second evaporator (20), second evaporator (20) and first evaporator (10) interval are arranged；
Wherein, second evaporator (20) can be used for carrying out second evaporator (20) and first evaporator (10)
Defrost.
2. refrigeration unit according to claim 1, which is characterized in that the refrigeration unit further includes：
Compressor (30)；
The outlet of condenser (40), the compressor (30) is connected with the import of the condenser (40)；
Wherein, the outlet of the condenser (40) is connected to first evaporator (10) and second evaporator (20).
3. refrigeration unit according to claim 2, which is characterized in that the refrigeration unit further includes：
First pipeline (70), first pipeline (70) setting the condenser (40) and second evaporator (20) it
Between；
Second pipeline (80), second pipeline (80) setting the condenser (40) and second evaporator (20) it
Between；
First expansion valve (50), first expansion valve (50) are arranged on first pipeline (70)；
Wherein, first pipeline (70) is arranged in parallel with second pipeline (80), first pipeline (70) and described
Two pipelines (80) can be arranged to on-off.
4. refrigeration unit according to claim 3, which is characterized in that when first pipeline (70) be connected to, described second
When pipeline (80) disconnects, the second evaporator (20) refrigeration；When first pipeline (70) disconnection, second pipeline (80)
When connection, the second evaporator (20) defrost.
5. refrigeration unit according to claim 3, which is characterized in that first expansion valve (50) is electric expansion valve.
6. refrigeration unit according to claim 3, which is characterized in that the refrigeration unit further includes：
Switching control pilot (60), the switching control pilot (60) are arranged on second pipeline (80).
7. refrigeration unit according to claim 2, which is characterized in that the refrigeration unit further includes：
Heat exchanger (90), heat exchanger (90) setting are formed between the compressor (30) and second evaporator (20)
Circulation line on.
8. refrigeration unit according to claim 7, which is characterized in that the heat exchanger (90) has first passage and second
Channel, one end of the first passage are connected with the outlet of the condenser (40), the other end of the first passage and institute
The import for stating the second evaporator (20) is connected；One end of the second channel is connected with the outlet of second evaporator (20)
Logical, the other end of the first passage is connected with the import of the compressor (30).
9. refrigeration unit according to claim 2, which is characterized in that the refrigeration unit further includes：
Second expansion valve (100), second expansion valve (100) are arranged in the condenser (40) and first evaporator
(10) on the pipeline between.
10. refrigeration unit according to claim 2, which is characterized in that the refrigeration unit further includes：
Gas-liquid separator (110), the import of the gas-liquid separator (110) and first evaporator (10) and described second are steamed
Hair device (20) is connected to, and the outlet of the gas-liquid separator (110) is connected with the import of the compressor (30).
11. refrigeration unit according to claim 1, which is characterized in that the refrigeration unit further includes：
The air outlet of first blower (120), first blower (120) is arranged towards second evaporator (20), and described
Two evaporators (20) are arranged between first blower (120) and first evaporator (10).
12. according to claim 1 or refrigeration unit described in 11, which is characterized in that first evaporator (10) and described
Two evaporators (20) are finned heat exchanger, and the spacing between the adjacent two panels fin of first evaporator (10) is less than described
Spacing between the adjacent two panels fin of second evaporator (20).
13. a kind of refrigeration equipment, including refrigeration unit, which is characterized in that the refrigeration unit is any in claim 1 to 12
Refrigeration unit described in.
14. a kind of refrigeration unit control method, which is characterized in that including：
Control enters the first evaporator (10) through condenser (40) condensed refrigerant, the first evaporator (10) refrigeration；
The on-off of each pipeline between the condenser (40) and the second evaporator (20) is controlled, so that cold through condenser (40)
Refrigerant after solidifying selectively passes through described in the entrance of the pipeline between the condenser (40) and second evaporator (20)
Second evaporator (20), to realize the refrigeration or defrost of second evaporator (20).
15. refrigeration unit control method according to claim 14, which is characterized in that the condenser (40) is steamed with second
Sending out has the first pipeline (70) and the second pipeline (80), first pipeline (70) and second pipeline (80) between device (20)
It is arranged in parallel, first pipeline (70) and second pipeline (80) can be arranged to on-off, on first pipeline (70)
It is provided with the first expansion valve (50)；When first pipeline (70) is connected to, and second pipeline (80) disconnects, described second steams
Send out device (20) refrigeration；When first pipeline (70) disconnects, and second pipeline (80) is connected to, second evaporator (20)
Defrost.
16. refrigeration unit control method according to claim 15, which is characterized in that the refrigeration unit control method is also
Including：
According to the temperature of the inlet tube of second evaporator (20), first pipeline (70) and second pipeline are controlled
(80) on-off.
17. refrigeration unit control method according to claim 15, which is characterized in that when second evaporator (20) is made
When cold, by adjusting the aperture of first expansion valve (50), keep the temperature of the inlet tube of second evaporator (20)
Between 0 DEG C -5 DEG C.
18. refrigeration unit control method according to claim 15, which is characterized in that the refrigeration unit control method is also
Including：
According to indoor temperature, the running frequency of compressor (30) and the wind speed of the first blower (120) are adjusted；
Wherein, the air outlet of first blower (120) is set towards second evaporator (20), second evaporator (20)
It sets between first blower (120) and first evaporator (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317027.1A CN108826724A (en) | 2018-04-10 | 2018-04-10 | Refrigeration unit, refrigeration equipment and refrigeration unit control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317027.1A CN108826724A (en) | 2018-04-10 | 2018-04-10 | Refrigeration unit, refrigeration equipment and refrigeration unit control method |
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|---|---|
| CN108826724A true CN108826724A (en) | 2018-11-16 |
Family
ID=64154601
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| CN201810317027.1A Pending CN108826724A (en) | 2018-04-10 | 2018-04-10 | Refrigeration unit, refrigeration equipment and refrigeration unit control method |
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| CN111536723A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device for secondary condensation and supercooling of main path refrigerant |
| CN112797593A (en) * | 2020-12-28 | 2021-05-14 | 珠海格力电器股份有限公司 | Self-cleaning control method and single-cooling type air conditioner |
| CN114930095A (en) * | 2019-11-15 | 2022-08-19 | 赫尔大学 | Heat pump adapter system |
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Application publication date: 20181116 |