CN106288472B - Double-evaporator water chilling unit and oil return method and oil chilling method thereof - Google Patents
Double-evaporator water chilling unit and oil return method and oil chilling method thereof Download PDFInfo
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- CN106288472B CN106288472B CN201610861131.8A CN201610861131A CN106288472B CN 106288472 B CN106288472 B CN 106288472B CN 201610861131 A CN201610861131 A CN 201610861131A CN 106288472 B CN106288472 B CN 106288472B
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- evaporator
- oil
- control valve
- oil return
- injection device
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000003921 oil Substances 0.000 claims description 187
- 238000002347 injection Methods 0.000 claims description 90
- 239000007924 injection Substances 0.000 claims description 90
- 239000007788 liquid Substances 0.000 claims description 39
- 239000010687 lubricating oil Substances 0.000 claims description 24
- 239000002828 fuel tank Substances 0.000 claims description 18
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 76
- 230000000694 effects Effects 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 230000001502 supplementing effect Effects 0.000 description 6
- 238000005273 aeration Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000010726 refrigerant oil Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000004804 winding Methods 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/072—Intercoolers therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2105—Oil temperatures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21155—Temperatures of a compressor or the drive means therefor of the oil
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a double-evaporator water chilling unit, an oil return method and an oil cooling method thereof, wherein the double-evaporator water chilling unit comprises a condenser (1), a compressor (2), an oil tank (3), a first evaporator (4), a second evaporator (5), an ejector component, an oil return control valve (14) and a cold oil control valve (15), wherein the inlet end of the ejector component is communicated with the condenser (1), the oil return control valve (14) is positioned between the outlet end of the ejector component and an air suction port of the compressor (2), and the cold oil control valve (15) is positioned between the outlet end of the ejector component and the oil tank (3); the ejector assembly is arranged in at least one of the first evaporator (4) and the second evaporator (5). According to the double-evaporator water chilling unit, the oil return and cold oil operation is realized through the switching of the oil return control valve and the cold oil control valve, and the structure of the double-evaporator water chilling unit is simplified.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, more particularly to a kind of double evaporators handpiece Water Chilling Units and its oil return method and
Cold oil method.
Background technology
In the process of running, the friction of bearing and speed increasing gear etc. can generate a large amount of heat to handpiece Water Chilling Units, need to lead to
It crosses lubrication oil circulation and takes away heat, but the temperature of lubricating oil system can accumulate promotion.It is also, small due to the efficiency of sealing device
Parts of lubricating oil will be leaked in coolant system.Therefore, handpiece Water Chilling Units inevitably need to be equipped with the cold oil dress of lubricating oil
It puts and oil return apparatus.
At present, cold oil device is mainly independent oil cooler (such as plate heat exchanger or double pipe heat exchanger), is used
Refrigerant cools down or external water cooling.And oil return apparatus is also required to independent oil return apparatus.
But in double evaporators handpiece Water Chilling Units, since the liquid level of evaporator under different working modes is different, it is separately provided
Cold oil device and oil return apparatus can make system structure complicated, realize the operating difficulties of oil return and cold oil.
Therefore, oil return and the operation of cold oil how to be realized, simplifies structure, being that those skilled in the art is urgently to be resolved hurrily asks
Topic.
Invention content
In view of this, the present invention provides a kind of double evaporators handpiece Water Chilling Units, to realize the operation of oil return and cold oil, letter
The structure of double evaporators handpiece Water Chilling Units is changed.The invention also discloses a kind of oil return using above-mentioned double evaporators handpiece Water Chilling Units and
Cold oil method.
To achieve the above object, the present invention provides following technical solution：
It can be seen from the above technical scheme that double evaporators handpiece Water Chilling Units provided by the invention, including condenser, compression
Machine, fuel tank, the first evaporator and the second evaporator further include injection device assembly, oil return control valve and cold oil control valve, described to draw
The input end of emitter assemblies is connected with the condenser, and the oil return control valve is located at the port of export and the institute of the injection device assembly
Between the air entry for stating compressor, the cold oil control valve is located between the port of export and the fuel tank of the injection device assembly；
The injection device assembly is provided in first evaporator and at least one evaporator in second evaporator；
When oil return operates, the oil return control valve is opened, and the cold oil control valve is closed；It is returned described in when cold oil operates
Oil control valve is closed, and the cold oil control valve is opened.
Preferably, in above-mentioned double evaporators handpiece Water Chilling Units, in the input end and the condenser of the injection device assembly
Top connects.
Preferably, in above-mentioned double evaporators handpiece Water Chilling Units, the quantity of the injection device assembly is two, is respectively set to
The first injection device assembly in first evaporator and the second injection device assembly being set in second evaporator；
It further includes the first injecting valve contacted with the first injector component and contacts with the second injector component
The second injecting valve；
When cold oil operates under oil return operation or the second evaporator heat exchange state under the first evaporator heat exchange state, described the
One injecting valve is closed, and second injecting valve is opened；Oil return operates or in the first evaporator under the second evaporator heat exchange state
When cold oil operates under heat exchange state, first injecting valve is opened, and second injecting valve is closed.
Preferably, in above-mentioned double evaporators handpiece Water Chilling Units, the liquid taking port of the first injection device assembly is located at close to described
The position of first base of evaporator；
And/or the liquid taking port of the second injection device assembly is located at close to the position of second base of evaporator.
Preferably, in above-mentioned double evaporators handpiece Water Chilling Units, first injecting valve includes and the first injection device assembly
Input end connection the first injection inlet valve and the first eductor outlet for being connect with the port of export of the first injection device assembly
Valve；
And/or second injecting valve include with the second injection that the input end of the second injection device assembly is connect into
Mouth valve and the second eductor outlet valve being connect with the port of export of the second injection device assembly.
Preferably, in above-mentioned double evaporators handpiece Water Chilling Units, the quantity of the injection device assembly is one.
The present invention also provides a kind of oil return method applied such as double evaporators handpiece Water Chilling Units described in any one of the above embodiments, packets
Include step：
A1) start the compressor；
A2 the oil return control valve) is opened, the cold oil control valve is in off state.
Preferably, in above-mentioned oil return method, the step a1) be specially：Start the compressor, when the compressor is transported
After row setting time, into the step a2).
Preferably, in above-mentioned oil return method, the step a2) further include step a3 later)：The oil return control valve is opened
After the default oil return time, the oil return control valve is closed.
The present invention also provides a kind of cold oil method applied such as double evaporators handpiece Water Chilling Units described in any one of the above embodiments, packets
Include step：
B1) start the compressor；
B2 the cold oil control valve) is opened, the oil return control valve is in off state.
Preferably, in above-mentioned cold oil method, the step b1) be specially：Start the compressor, detect lubricating oil temperature
Degree, when the lubricating oil temperature is higher than set temperature, into the step b2).
Preferably, in above-mentioned cold oil method, the step b2) further include step b3 later)：The cold oil control valve is opened
After the default cold oil time, the cold oil control valve is closed.
Double evaporators handpiece Water Chilling Units provided by the invention, in oil return operating process, oil return control valve is opened and cold oil control
Valve processed is closed, and carrying out the high-pressure gaseous refrigerant of condenser, (the first evaporator draws with being provided in the second evaporator by evaporator
The evaporator of emitter assemblies) in liquid refrigerant injection enter at the air entry of compressor, here (environment under low pressure) through refrigerant with
After liquid refrigerant shwoot in oil mixture, the concentration of lubricating oil is improved and is reached in the oil sump in compressor (bottom case), and
It flows into fuel tank and completes oil return.In cold oil operating process, oil return control valve is closed, and cold oil control valve is opened, and comes condenser top
The high-pressure gaseous refrigerant in portion is by evaporator (evaporator that injection device assembly is provided in the first evaporator and the second evaporator)
Middle liquid refrigerant injection enters fuel tank, liquid refrigerant (hot environment) heat absorption evaporation here so that the lubricating oil in fuel tank
Temperature reduces, and completes cold oil process.Double evaporators handpiece Water Chilling Units provided by the invention pass through oil return control valve and cold oil control valve
Switching, realize oil return and the operation of cold oil, simplify the structure of double evaporators handpiece Water Chilling Units.
The present invention also provides a kind of using the oil return method of above-mentioned double evaporators handpiece Water Chilling Units and cold oil method.Due to upper
Double evaporators handpiece Water Chilling Units are stated with above-mentioned technique effect, oil return method and cold oil side using above-mentioned double evaporators handpiece Water Chilling Units
Method should also have same technique effect, no longer be discussed in detail herein.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of double evaporators handpiece Water Chilling Units provided in an embodiment of the present invention.
Specific embodiment
The invention discloses a kind of double evaporators handpiece Water Chilling Units, to realize the operation of oil return and cold oil, simplify double steamings
Send out the structure of device handpiece Water Chilling Units.The invention also discloses a kind of oil return using above-mentioned double evaporators handpiece Water Chilling Units and cold oil sides
Method.
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution 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, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig.1, an embodiment of the present invention provides a kind of double evaporators handpiece Water Chilling Units, including condenser 1, compressor 2,
Fuel tank 3, the first evaporator 4, the second evaporator 5, injection device assembly, oil return control valve 14 and cold oil control valve 15.
It is understood that the first evaporator 4 is connected with the second evaporator 5 by coolant channel, in the present embodiment,
Throttling set is provided on coolant channel between first evaporator 4 and the second evaporator 5.Wherein, it is provided on condenser 1
Coolant intake 1-1 and cooling water outlet mouth 1-2.
In double evaporators handpiece Water Chilling Units provided in this embodiment, the refrigerant outlet of the first evaporator 4 passes through the first system
Cryogen outlet valve 10 is connected with the air entry of compressor 2, and the refrigerant gas supplementing opening of the first evaporator 4 passes through the first refrigerant tonifying Qi
Valve 12 is connected with the gas supplementing opening of compressor 2, and the refrigerant inlet of the first evaporator 4 passes through the first refrigerant inlet valve 8 and condensation
The outlet of device 1.The refrigerant outlet of second evaporator 5 passes through second refrigerant outlet valve 11 and the air entry of compressor 2
Connection, the refrigerant gas supplementing opening of the second evaporator 5 are connected by second refrigerant aeration valve 13 with the gas supplementing opening of compressor 2, the
The refrigerant inlet of two evaporators 5 passes through second refrigerant inlet valve 9 and the outlet of condenser 1.
It is illustrated so that the first evaporator 4 is refrigerating evaporator, the second evaporator 5 is ice making evaporator as an example：
Under refrigerating state (the first evaporator heat exchange state), then the first evaporator 4 is as double evaporators handpiece Water Chilling Units
Evaporator uses.That is, the first evaporator 4-1 and the first evaporator outlet 4-2 of the first evaporator 4 are opened, the second evaporation
The the second evaporator 5-1 and the second evaporator outlet 5-2 of device 5 are closed.Second refrigerant outlet valve 11, the first refrigerant are mended
12 and first refrigerant inlet valve 8 of air valve is closed, and the first refrigerant outlet valve 10, second refrigerant aeration valve 13, second freeze
Agent inlet valve 9 is opened.In this case, the first evaporator 4 is used as the evaporator in double evaporators handpiece Water Chilling Units, and second steams
Hair device 5 is used as economizer.That is, refrigerant is flowed out by the outlet of condenser 1, enter after second refrigerant inlet valve 9
Second evaporator 5 passes through the throttling shwoot decrease temperature and pressure of refrigerant itself so that in a part of medium temperature in the second evaporator 5
The gaseous refrigerant of pressure flows into the gas supplementing opening of compressor 2, another part liquid refrigerant warp by second refrigerant aeration valve 13
It crosses second level throttling and flows into the first evaporator 4.At this point, refrigerant in the first evaporator 4 with by the first evaporator 4-1 into
Enter and exchanged heat by the first evaporator outlet 4-2 fluids (chilled water) flowed out.Absorption heat of vaporization is gaseous refrigerant
The air entry of compressor 2 is flowed by the first refrigerant outlet valve 10, by compressor 2 compress refrigerant by condenser 1 into
Mouth flows into.
Under ice-make condition (the second evaporator heat exchange state), then the second evaporator 5 is as double evaporators handpiece Water Chilling Units
Evaporator uses.That is, the second evaporator 5-1 and the second evaporator outlet 5-2 of the second evaporator 5 are opened, the first evaporation
The the first evaporator 4-1 and the first evaporator outlet 4-2 of device 4 are closed.First refrigerant outlet valve 10, second refrigerant are mended
Air valve 13, second refrigerant inlet valve 9 are closed, second refrigerant outlet valve 11, the first refrigerant aeration valve 12 and the first refrigeration
Agent inlet valve 8 is opened.In this case, the second evaporator 5 is used as the evaporator in double evaporators handpiece Water Chilling Units, and first steams
Hair device 4 is used as economizer.That is, refrigerant is flowed out by the outlet of condenser 1, enter after the first refrigerant inlet valve 8
First evaporator 4 passes through the throttling shwoot decrease temperature and pressure of refrigerant itself so that in a part of medium temperature in the first evaporator 4
The gaseous refrigerant of pressure flows into the gas supplementing opening of compressor 2, another part liquid refrigerant warp by the first refrigerant aeration valve 12
It crosses second level throttling and flows into the second evaporator 5.At this point, refrigerant in the second evaporator 5 with by the second evaporator 5-1 into
Enter and exchanged heat by the second evaporator outlet 5-2 fluids (ethylene glycol) flowed out.Absorption heat of vaporization is gaseous refrigerant
The air entry of compressor 2 is flowed by second refrigerant outlet valve 11, by compressor 2 compress refrigerant by condenser 1 into
Mouth flows into.
Wherein, the input end of injection device assembly is connected with condenser 1, and oil return control valve 14 is located at the outlet of injection device assembly
Between end and the air entry of compressor 2, cold oil control valve 15 is located between the port of export of injection device assembly and fuel tank 3；First steams
In hair 4 and second evaporator 5 of device injection device assembly is provided at least one evaporator.Also, the oil return control when oil return operates
Valve 14 processed is opened, and cold oil control valve 15 is closed；When cold oil operates, oil return control valve 14 is closed, and cold oil control valve 15 is opened.
Double evaporators handpiece Water Chilling Units provided in an embodiment of the present invention, in oil return operating process, oil return control valve 14 is opened
And cold oil control valve 15 is closed, and carrys out the high-pressure gaseous refrigerant of condenser 1 by evaporator (the first evaporator 4 and the second evaporation
The evaporator of injection device assembly is provided in device 5) in liquid refrigerant injection enter at the air entry of compressor 2, (low pressure here
Environment) after the liquid refrigerant shwoot in refrigerant and oil mixture, the concentration of lubricating oil improves and reaches the oil in compressor 2
In pond (bottom case), and flow into fuel tank 3 and complete oil return.In cold oil operating process, oil return control valve 14 is closed, cold oil control valve 15
It opens, carrying out the high-pressure gaseous refrigerant at the top of condenser 1, (the first evaporator 4 in the second evaporator 5 with being provided with by evaporator
The evaporator of injection device assembly) in liquid refrigerant injection enter fuel tank 3, liquid refrigerant here steam by (hot environment) heat absorption
Hair so that the lubricating oil temperature in fuel tank 3 reduces, and completes cold oil process.Double evaporators cooling-water machine provided in an embodiment of the present invention
Group by the switching of oil return control valve 14 and cold oil control valve 15, realizes oil return and the operation of cold oil, simplifies double evaporators
The structure of handpiece Water Chilling Units.
Compressor 2 can be piston compressor, centrifugal compressor or screw compressor.
Since gaseous refrigerant weighs less than the weight of liquid refrigerant, in order to ensure the injection effect of injection device assembly,
The input end of injection device assembly is connected with the top in condenser 1, in order to ensure that high-pressure gaseous refrigerant flows into injector
The input end of component.It is of course also possible to which the input end of injection device assembly is connected with the middle part in condenser 1, do not make herein
It is specific to limit and within protection domain.
As shown in Figure 1, in the present embodiment, injection device assembly includes the first injection device assembly 6 and the second injection device assembly
7；Double evaporators handpiece Water Chilling Units further include the first injecting valve for contacting with the first injection device assembly 6 and with the second injection device assembly 7
Second injecting valve of series winding；Under the first evaporator heat exchange state oil return operation or the second evaporator heat exchange state under cold oil operate
When, the first injecting valve is closed, and the second injecting valve is opened；Oil return operates or in the first evaporator under the second evaporator heat exchange state
When cold oil operates under heat exchange state, the first injecting valve is opened, and the second injecting valve is closed.
Preferably, the liquid taking port of the first injection device assembly 6 is located at close to the position of 4 bottom of the first evaporator；And/or the
The liquid taking port of two injection device assemblies 7 is located at close to the position of 5 bottom of the second evaporator.Effectively prevent the situation of oil return failure.
It is understood that when oil return operates, returned using the injection device assembly in the evaporator as economizer
Oil.Since the refrigerant liquid level inside economizer is relatively low, refrigerant oil-bearing amount inside medium temperature and medium pressure state, economizer compared with
Height avoids the operation that upper strata liquid level takes liquid so that the liquid taking port of the first injection device assembly 6 and the second injection device assembly 7 can be with
Positioned at close to the position of base of evaporator.It need not be accurately controlled at the upper strata liquid level of evaporator, avoid oil return operation failure.
When cold oil operates, cold oil is carried out using the injection device assembly in the evaporator as double evaporators handpiece Water Chilling Units, is further carried
High cold oil effect.
It is of course also possible to by the setting of injection device assembly and the centre position of evaporator.
It is refrigerating evaporator with the first evaporator 4, the second evaporator 5 is for ice making evaporator.
Under refrigerating state, the second evaporator 5 is used as economizer, liquid refrigerant by the second evaporator 5 bottom
It draws and enters back into the first evaporator 4 through second throttle, therefore, the refrigerant liquid level inside the second evaporator 5 is relatively low, in medium temperature
Middle pressure condition, the refrigerant oil-bearing amount inside the second evaporator 5 are higher.Avoid the operation that upper strata liquid level takes liquid.
In oil return operating process, oil return control valve 14 is opened, and cold oil control valve 15 is closed；Also, the first injecting valve closes
It closes, the second injecting valve is opened.The high-pressure gaseous refrigerant for carrying out condenser 1 is passed through the second injection device assembly 7, by the second evaporator
Liquid refrigerants injection enters at the air entry of compressor 2 in 5, and the concentration of lubricating oil is carried after the shwoot of liquid refrigerants here
Height is flowed into using the oil outlet of compressor 2 in fuel tank 3, completes oil return operation.
In cold oil operating process, (such as detect lubricating oil temperature higher than setting when needing to cool down lubricating oil
During value), cold oil control valve 15 is opened, and oil return control valve 14 is closed；Also, the first injecting valve is opened, and the second injecting valve is closed.Come
The high-pressure gaseous refrigerant of condenser 1 is passed through the first injection device assembly 6, and by the liquid refrigerants in the first evaporator 4, (low temperature is low
Pressure condition) injection enters in fuel tank 3, and liquid refrigerants absorbs heat evaporation herein so that the temperature of lubricating oil reduces in fuel tank 3, completes cold
Oil operation.
Similarly, under ice-make condition, the first evaporator 4 is used as economizer, and liquid refrigerant is by the first evaporator 4
Bottom draw and through second throttle enter back into the second evaporator 5, therefore, the refrigerant liquid level the first evaporator 4 inside is relatively low, locates
Refrigerant oil-bearing amount inside medium temperature and medium pressure state, the first evaporator 4 is higher.Avoid the operation that upper strata liquid level takes liquid.
In oil return operating process, oil return control valve 14 is opened, and cold oil control valve 15 is closed；Also, the first injecting valve is opened
It opens, the second injecting valve is closed.The high-pressure gaseous refrigerant for carrying out condenser 1 is passed through the first injection device assembly 6, by the first evaporator
Liquid refrigerants injection enters at the air entry of compressor 2 in 4, and the concentration of lubricating oil is carried after the shwoot of liquid refrigerants here
Height is flowed into using the oil outlet of compressor 2 in fuel tank 3, completes oil return operation.
In cold oil operating process, (such as detect lubricating oil temperature higher than setting when needing to cool down lubricating oil
During value), cold oil control valve 15 is opened, and oil return control valve 14 is closed；Also, the first injecting valve is closed, and the second injecting valve is opened.Come
The high-pressure gaseous refrigerant of condenser 1 is passed through the second injection device assembly 7, and by the liquid refrigerants in the second evaporator 5, (low temperature is low
Pressure condition) injection enters in fuel tank 3, and liquid refrigerants absorbs heat evaporation herein so that the temperature of lubricating oil reduces in fuel tank 3, completes cold
Oil operation.
In the present embodiment, the first evaporator 4 is refrigerating evaporator, and the second evaporator 5 is ice making evaporator.Therefore,
One evaporator heat exchange state is refrigerating state, and the second evaporator heat exchange state is ice-make condition.
Further, in order to improve the break-make effect of the first injecting valve and the second injecting valve, the first injecting valve includes and the
It first injection inlet valve 17 of the input end connection of one injection device assembly 6 and connect with the port of export of the first injection device assembly 6
First eductor outlet valve 16.Also, the second injecting valve include with the second injection that the input end of the second injection device assembly 7 is connect into
Mouth valve 19 and the second eductor outlet valve 18 being connect with the port of export of the second injection device assembly 7.
The first injecting valve can also only be made to include the first injection inlet valve 17 and the first eductor outlet valve 16, and the second injection
Valve is one in the second injection inlet valve 19 or the second eductor outlet valve 18.The second injecting valve can also only be made to draw including second
19 and second eductor outlet valve 18 of inlet valve is penetrated, and the first injecting valve packet is the first injection inlet valve 17 and the first eductor outlet valve
One in 16.First injecting valve and the second injecting valve can also be disposed as a valve, it is only necessary to ensure injection device assembly
The connection and disconnection of injection device assembly can be realized in the break-make of place pipeline.
In second of embodiment, the quantity of injection device assembly is one, this injection device assembly is set to the first evaporation
In 4 or second evaporator 5 of device.
By taking injection device assembly is the first injection device assembly 6 as an example, that is, injection device assembly is set in the first evaporator 4.
In concrete operations, cold oil operation is carried out preferably under the first evaporator heat exchange state (refrigerating state), it is ensured that
The effect of cold oil operation.Also, oil return operation is carried out in the second evaporator heat exchange state (ice-make condition), also ensures that oil return is grasped
The effect of work.It is of course also possible to oil return operation is carried out under the first evaporator heat exchange state (refrigerating state), in the second evaporator
Heat exchange state (ice-make condition) carries out cold oil operation.
In the embodiment for being the second injection device assembly 7 in injection device assembly, effect is same as above.It is excellent in order to ensure operating effect
Progress oil return operation under the first evaporator heat exchange state (refrigerating state) is selected in, in the second evaporator heat exchange state (ice-make condition)
Carry out cold oil operation.
The embodiment of the present invention additionally provides a kind of oil return method applied such as above-mentioned any double evaporators handpiece Water Chilling Units, packet
Include step：
Sa1：Start compressor 2；
Sa2：Oil return control valve 14 is opened, cold oil control valve 15 is in off state.
By above-mentioned setting, oil return operation is realized, simplifies the structure of double evaporators handpiece Water Chilling Units.
Further, step Sa1 is specially：Start compressor 2, after compressor 2 runs setting time, enter step
Sa2.Pass through above-mentioned setting, it is ensured that there are lubricating oil in the refrigeration system of double evaporators handpiece Water Chilling Units, in order to which oil return operates.
Wherein, setting time can be herein not particularly limited depending on actual demand.
Further, step Sa3 is further included after step Sa2：After oil return control valve 14 opens the default oil return time, close
Oil return control valve 14.That is, oil return operation is closed after oil return operation a period of time.Oil return operation can also be carried out always.
The embodiment of the present invention additionally provides a kind of cold oil method applied such as above-mentioned any double evaporators handpiece Water Chilling Units, packet
Include step：
Sb1：Start compressor 2；
Sb2：Cold oil control valve 15 is opened, oil return control valve 14 is in off state.
By above-mentioned setting, cold oil operation is realized, simplifies the structure of double evaporators handpiece Water Chilling Units.
Further, step Sb1 is specially：Start compressor 2, detect lubricating oil temperature, set when lubricating oil temperature is higher than
When constant temperature is spent, Sb2 is entered step.That is, in lubricating oil temperature higher than progress cold oil operation after set temperature；When lubricating oil temperature is low
When set temperature, then operated without cold oil.Set temperature can not equally be done have herein depending on actual demand
Body limits.
Further, step Sb3 is further included after step Sb2：After cold oil control valve 15 opens the default cold oil time, close
Cold oil control valve 15.That is, after completing an oil return period (default cold oil time), oil return operation is closed.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide range caused.
Claims (12)
1. a kind of double evaporators handpiece Water Chilling Units, including condenser (1), compressor (2), fuel tank (3), the first evaporator (4) and
Two evaporators (5), which is characterized in that injection device assembly, oil return control valve (14) and cold oil control valve (15) are further included, it is described to draw
The input end of emitter assemblies is connected with the condenser (1), oil return control valve (14) the going out positioned at the injection device assembly
Between mouth end and the air entry of the compressor (2), the cold oil control valve (15) is positioned at the port of export of the injection device assembly
Between the fuel tank (3)；
The injector group is provided in first evaporator (4) and at least one evaporator in second evaporator (5)
Part；
When oil return operates, the oil return control valve (14) is opened, and the cold oil control valve (15) is closed；When institute is operated in cold oil
Oil return control valve (14) closing is stated, the cold oil control valve (15) is opened.
2. double evaporators handpiece Water Chilling Units as described in claim 1, which is characterized in that the input end of the injection device assembly and institute
State the top connection in condenser (1).
3. double evaporators handpiece Water Chilling Units as described in claim 1, which is characterized in that the quantity of the injection device assembly is two
It is a, the first injection device assembly (6) for being respectively set in first evaporator (4) and it is set to second evaporator
(5) the second injection device assembly (7) in；
It further includes the first injecting valve contacted with the first injection device assembly (6) and is gone here and there with the second injection device assembly (7)
The second injecting valve even；
Under the first evaporator heat exchange state oil return operation or the second evaporator heat exchange state under cold oil operate when, described first draws
Valve closing is penetrated, second injecting valve is opened；Oil return operates or in the first evaporator heat exchange under the second evaporator heat exchange state
When cold oil operates under state, first injecting valve is opened, and second injecting valve is closed.
4. double evaporators handpiece Water Chilling Units as claimed in claim 3, which is characterized in that the first injection device assembly (6) take
Liquid mouth is located at close to the position of the first evaporator (4) bottom；
And/or the liquid taking port of the second injection device assembly (7) is located at close to the position of the second evaporator (5) bottom.
5. the double evaporators handpiece Water Chilling Units as described in claim 3 or 4, which is characterized in that first injecting valve includes and institute
State the first injection device assembly (6) input end connection the first injection inlet valve (17) and with the first injection device assembly (6)
The port of export connection the first eductor outlet valve (16)；
And/or second injecting valve includes the second injection import being connect with the input end of the second injection device assembly (7)
Valve (19) and the second eductor outlet valve (18) being connect with the port of export of the second injection device assembly (7).
6. double evaporators handpiece Water Chilling Units as described in claim 1, which is characterized in that the quantity of the injection device assembly is one
It is a.
7. a kind of oil return method applied such as claim 1-6 any one of them double evaporators handpiece Water Chilling Units, which is characterized in that
Including step：
A1) start the compressor (2)；
A2 the oil return control valve (14)) is opened, the cold oil control valve (15) is in off state.
8. oil return method as claimed in claim 7, which is characterized in that the step a1) be specially：Start the compressor
(2), after the compressor (2) runs setting time, into the step a2).
9. oil return method as claimed in claim 7 or 8, which is characterized in that the step a2) further include step a3 later)：Institute
After stating oil return control valve (14) the unlatching default oil return time, the oil return control valve (14) is closed.
10. a kind of cold oil method applied such as claim 1-6 any one of them double evaporators handpiece Water Chilling Units, feature exist
In including step：
B1) start the compressor (2)；
B2 the cold oil control valve (15)) is opened, the oil return control valve (14) is in off state.
11. cold oil method as claimed in claim 10, which is characterized in that the step b1) be specially：Start the compressor
(2), lubricating oil temperature is detected, when the lubricating oil temperature is higher than set temperature, into the step b2).
12. the cold oil method as described in claim 10 or 11, which is characterized in that the step b2) further include step later
b3)：After the cold oil control valve (15) opens the default cold oil time, the cold oil control valve (15) is closed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861131.8A CN106288472B (en) | 2016-09-28 | 2016-09-28 | Double-evaporator water chilling unit and oil return method and oil chilling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610861131.8A CN106288472B (en) | 2016-09-28 | 2016-09-28 | Double-evaporator water chilling unit and oil return method and oil chilling method thereof |
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| CN106288472B true CN106288472B (en) | 2018-07-06 |
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| CN108151347A (en) * | 2017-12-22 | 2018-06-12 | 重庆美的通用制冷设备有限公司 | refrigeration system and its control method |
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|---|---|---|---|---|
| CN2814269Y (en) * | 2005-07-01 | 2006-09-06 | 烟台冰轮股份有限公司 | Refrigerating system capable of ejecting scavenge return |
| JP4277597B2 (en) * | 2003-07-02 | 2009-06-10 | 株式会社日立プラントテクノロジー | Refrigeration equipment |
| CN104930740A (en) * | 2015-06-29 | 2015-09-23 | 中机西南能源科技有限公司 | Dual-evaporator refrigeration system |
| CN204987560U (en) * | 2015-06-29 | 2016-01-20 | 中机西南能源科技有限公司 | Compulsory oil return heating structure among double evaporation ware refrigerating system |
| CN206146031U (en) * | 2016-09-28 | 2017-05-03 | 珠海格力电器股份有限公司 | double-evaporator water chilling unit |
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2016
- 2016-09-28 CN CN201610861131.8A patent/CN106288472B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4277597B2 (en) * | 2003-07-02 | 2009-06-10 | 株式会社日立プラントテクノロジー | Refrigeration equipment |
| CN2814269Y (en) * | 2005-07-01 | 2006-09-06 | 烟台冰轮股份有限公司 | Refrigerating system capable of ejecting scavenge return |
| CN104930740A (en) * | 2015-06-29 | 2015-09-23 | 中机西南能源科技有限公司 | Dual-evaporator refrigeration system |
| CN204987560U (en) * | 2015-06-29 | 2016-01-20 | 中机西南能源科技有限公司 | Compulsory oil return heating structure among double evaporation ware refrigerating system |
| CN206146031U (en) * | 2016-09-28 | 2017-05-03 | 珠海格力电器股份有限公司 | double-evaporator water chilling unit |
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