CN105627614B - Refrigeration unit and its control method and control system - Google Patents
Refrigeration unit and its control method and control system Download PDFInfo
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- CN105627614B CN105627614B CN201610052931.5A CN201610052931A CN105627614B CN 105627614 B CN105627614 B CN 105627614B CN 201610052931 A CN201610052931 A CN 201610052931A CN 105627614 B CN105627614 B CN 105627614B
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- control
- refrigeration
- compressor
- temperature
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
-
- 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
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2105—Oil temperatures
Abstract
The invention provides a kind of refrigeration unit and its control method and control system, oil eliminator is used to refrigeration oil being directly transferred to compressor, or is transmitted refrigeration oil to the compressor by oil cooler；Refrigeration oil used for cooling tower in oil cooler and condenser cools down；Recuperation of heat case is used for the heat for collecting the refrigeration oil in oil cooler and condenser, and the refrigeration oil in oil cooler and condenser is heated using heat.When the temperature of refrigeration oil is higher, the refrigeration oil in oil eliminator can be controlled to be directly transferred to compressor, even if now refrigeration unit keeps certain water-carrying capacity, the heating effect of refrigeration oil will not also be impacted；When the temperature of refrigeration oil is relatively low, the refrigeration oil in oil eliminator can be controlled to be transmitted by oil cooler to compressor, the refrigeration oil in oil cooler and condenser can now be heated by recuperation of heat case or recuperation of heat case and heater, solve the problems, such as power consumption height and heating effect difference.
Description
Technical field
The present invention relates to air-conditioning technical field, more specifically to a kind of refrigeration unit and its control method and control
System.
Background technology
Because existing low temperature refrigerator group has evaporating temperature low and compresses the characteristics of bigger, therefore, can cause
The high steam of compressor discharge and the temperature of refrigeration oil are higher.When the temperature of refrigeration oil is too high, it is necessary in oil cooler
Cooling water refrigeration oil is cooled down after, can just be transmitted back to compressor.And when the temperature of refrigeration oil is too low, it is necessary in oil
Heater on separator is electrically heated to refrigeration oil, to prevent refrigeration oil from incorporating refrigerant.
But carry out heating frozen oil by electrical heating merely, power consumption height is not only resulted in, and heating can be led for a long time
Cause the effect of heating poor, for using the Large-scale machine set of external oil eliminator, the heating after long-time heating
Effect is worse.In addition, make low temperature, it is necessary to open the water pump of control cooling tower before compressor start in low temperature refrigerator group
Refrigeration unit keeps certain water-carrying capacity, and still, cooling water now can influence the heating effect of refrigeration oil in oil cooler.
The content of the invention
In view of this, the invention provides a kind of refrigeration unit and its control method and control system, to solve existing skill
It is simple using the problem of power consumption height caused by electrical heating heating frozen oil and heating effect difference and in compressor start in art
The certain water-carrying capacity of preceding holding influences the problem of heating effect of the refrigeration oil in oil cooler.
To achieve the above object, the present invention provides following technical scheme：
A kind of refrigeration unit, including oil eliminator, compressor, oil cooler, condenser, cooling tower and recuperation of heat case, institute
State the temperature sensor that there is the heater heated to the refrigeration oil in oil eliminator and detect the freezing oil temperature；
The oil eliminator is used to refrigeration oil being directly transferred to the compressor, or, will by the oil cooler
The refrigeration oil is transmitted to the compressor；
The refrigeration oil used for cooling tower in the oil cooler and condenser cools down；
The recuperation of heat case is used for the heat for collecting the refrigeration oil in the oil cooler and condenser, and utilizes the heat
Amount heats to the refrigeration oil in the oil cooler and condenser；
Wherein, when the cooling tower cools down to the refrigeration oil in the oil cooler and condenser, the recuperation of heat
Case stops heating the refrigeration oil in the oil cooler and condenser；The recuperation of heat case is to the oil cooler and cold
When refrigeration oil in condenser is heated, the cooling tower stops cold to the refrigeration oil progress in the oil cooler and condenser
But.
Preferably, the refrigeration unit also includes first be connected with the inlet of the oil cooler and the condenser
Pipeline, the second pipeline being connected with the liquid outlet of the oil cooler and the condenser and the oil eliminator oil-out connect
The 3rd pipeline connect；
There is the first control valve on first pipeline, there is the second control valve on second pipeline, the described 3rd closes
There is the 3rd control valve on road；
First control valve is used for the liquid outlet for controlling the cooling tower and first pipeline connection, so that described cold
But the coolant in tower enters in the oil cooler and condenser, or the liquid outlet of the control recuperation of heat case and described the
One pipeline connection, so that the liquid in the recuperation of heat case enters in the oil cooler and condenser；
Second control valve is used to control second pipeline to connect with the inlet of the cooling tower or recuperation of heat case；
3rd control valve is used to control the pipeline of mistake the 3rd directly to connect with the compressor, or described in control
3rd pipeline is connected by the oil cooler with the compressor；
Wherein, the liquid outlet of the cooling tower and first pipeline connection are controlled by first control valve, is passed through
Second control valve controls second pipeline to be connected with the inlet of the recuperation of heat case, to control the recuperation of heat case pair
The heat of refrigeration oil in the oil cooler and condenser is collected.
Preferably, include applied to refrigeration unit as described above, the control method：
Before compressor unlatching, judge the temperature of refrigeration oil in the oil eliminator whether less than the first default temperature
Degree；
If it is not, the refrigeration oil in the oil eliminator is controlled to be directly transferred to the compressor, the control cooling tower pair
Refrigeration oil in the oil cooler and condenser is cooled down, controls the compressor to open；
If so, the refrigeration oil in the oil eliminator is controlled to be transmitted by the oil cooler to the compressor, control
The recuperation of heat case heats to the refrigeration oil in the oil cooler and condenser；
Judge whether the temperature of the refrigeration oil in the oil eliminator is less than the second preset temperature, second preset temperature
More than first preset temperature, if it is not, control compressor is opened, controls the cooling tower to the oil cooler and condenser
In refrigeration oil cooled down, control the refrigeration oil in the oil eliminator to be directly transferred to the compressor, if so, control institute
Heater unlatching is stated, and when the temperature of the refrigeration oil is higher than second preset temperature, controls the heater to close, control
The compressor is made to open, control the cooling tower to cool down the refrigeration oil in the oil cooler and condenser, control
Refrigeration oil in the oil eliminator is directly transferred to the compressor.
Preferably, the control method also includes：
During the compressor operating, judge whether the temperature of the refrigeration oil is less than the 3rd preset temperature；
If so, the refrigeration oil in the oil eliminator is controlled to be directly transferred to the compressor；
If it is not, judge whether the temperature of the refrigeration oil is less than the 4th preset temperature, the 4th preset temperature is more than the
Three preset temperatures；
If so, a part of refrigeration oil in the oil eliminator is controlled to be transmitted by the oil cooler to the compression
Machine, another part refrigeration oil are directly transferred to the compressor；
If it is not, judging whether the temperature of the refrigeration oil is higher than the 5th preset temperature, the 5th preset temperature is more than institute
The 4th preset temperature is stated, if so, controlling the refrigeration oil in the oil eliminator to be transmitted by the oil cooler to the compression
Machine.
Preferably, the control method also includes：
During the compressor operating, the recuperation of heat case is controlled to collect in the oil cooler and condenser
The heat of refrigeration oil, or, control the cooling tower to cool down the refrigeration oil in the oil cooler and condenser.
Preferably, the control method also includes：
In the compressor shutdown, control compressor is closed and controls the refrigeration oil in the oil eliminator directly to transmit
To the compressor.
Preferably, the control method also includes：
During the compressor shutdown, the refrigeration oil in the oil eliminator is controlled to be directly transferred to the compression
Machine, and judge whether the temperature of the refrigeration oil is less than the 6th preset temperature, if so, heater, if it is not, judging described cold
Whether the temperature of frozen oil is higher than the 7th preset temperature, if it is not, heater, and it is pre- higher than the 7th in the temperature of the refrigeration oil
If during temperature, close heater.
A kind of control system of refrigeration unit, applied to refrigeration unit as described above, the control system includes：
Control module is judged, for before compressor unlatching, judging the temperature of refrigeration oil in the oil eliminator
Whether the first preset temperature is less than, if it is not, sending the first control instruction to the first control module, sending the second control instruction to the
Two control modules, the 3rd control instruction to the 3rd control module is sent, if so, sending the 4th control instruction to the second control mould
Block, send the 5th control instruction to the 3rd control module and judge whether the temperature of the refrigeration oil in the oil eliminator is less than
Second preset temperature, second preset temperature is more than first preset temperature, if it is not, then sending first control instruction
To the first control module, transmission the 3rd control instruction to the 3rd control module, send second control instruction extremely
Second control module, if so, then sending the 6th control instruction to the 4th control module, and continue to judge the refrigeration oil
Whether temperature is less than the second preset temperature, if it is not, sending described in first control instruction to first control module, transmission
3rd control instruction to the 3rd control module, the 7th control instruction is sent to the 4th control module, transmission second control
System is instructed to second control module；
First control module is used to control compressor to open after first control instruction is received；
The refrigeration oil that second control module is used in oil eliminator is controlled after receiving second control instruction
The compressor is directly transferred to, controls the refrigeration oil in the oil eliminator to pass through after the 4th control instruction is received
The oil cooler is transmitted to the compressor；
3rd control module be used for after the 3rd control instruction is received control cooling tower to the oil cooling but
Refrigeration oil in device and condenser is cooled down, controls recuperation of heat case to stop to the refrigeration oil in the oil cooler and condenser
Heating, control recuperation of heat case adds to the refrigeration oil in the oil cooler and condenser after receiving the 5th control instruction
Heat, control cooling tower stop cooling down the refrigeration oil in the oil cooler and condenser；
4th control module is used to control heater to open after the 6th control instruction is received, and is receiving
Heater is controlled to close after 7th control instruction.
Preferably, the judgement control module is additionally operable to during the compressor operating, judge the refrigeration oil
Temperature whether be less than the 3rd preset temperature, if so, second control instruction to the second control module is sent, if it is not, judging
Whether the temperature of the refrigeration oil is less than the 4th preset temperature, and the 4th preset temperature is more than the 3rd preset temperature, if so, hair
The 8th control instruction is sent to the second control module, if it is not, judging whether the temperature of the refrigeration oil is higher than the 5th preset temperature, institute
State the 5th preset temperature and be more than the 4th preset temperature, if so, sending the 4th control instruction to the second control module；
Second control module is additionally operable to after the 8th control instruction is received, and is controlled in the oil eliminator
A part of refrigeration oil is transmitted to the compressor, another part refrigeration oil by the oil cooler and is directly transferred to the compression
Machine.
Preferably, the judgement control module is additionally operable to during the compressor operating, sends the 3rd control
System is instructed to the 3rd control module, or, send the 9th control instruction to the 3rd control module；
3rd control module is additionally operable to control the recuperation of heat case to the oil cooling after receiving the 9th control instruction
But the heat of the refrigeration oil in device and condenser is collected.
Preferably, the judgement control module is additionally operable in the compressor shutdown, sends the tenth control instruction to the
One control module, and second control instruction is sent to the second control module；
First control module is additionally operable to after the tenth control instruction is received, and control compressor is closed.
Preferably, the judgement control module is additionally operable to during the compressor shutdown, sends second control
System instruction judges whether the temperature of the refrigeration oil is less than the 6th preset temperature to the second control module, if so, described in sending
6th control instruction is to the 4th control module, if it is not, judge whether the temperature of the refrigeration oil is higher than the 7th preset temperature, if
It is no, the 6th control instruction is sent to the 4th control module, and when the temperature of the refrigeration oil is higher than seven preset temperatures,
Send the 7th control instruction to the 4th control module.
Compared with prior art, technical scheme provided by the present invention has advantages below：
Refrigeration unit and its control method and control system provided by the present invention, the temperature of refrigeration oil in oil eliminator
When higher, the refrigeration oil in oil eliminator can be controlled to be directly transferred to compressor, even if now cooling tower to oil cooler and
Refrigeration oil in condenser is cooled down i.e. refrigeration unit and keeps certain water-carrying capacity, and also the heating effect of refrigeration oil will not be made
Into influence；When the temperature of refrigeration oil is relatively low in oil eliminator, the refrigeration oil in oil eliminator can be controlled to pass through oil cooler
Transmit to compressor, now can be by recuperation of heat case or recuperation of heat case and heater to the freezing in oil cooler and condenser
Oil is heated, and uses power consumption caused by electrical heating heating frozen oil is high and heating effect is poor to ask merely so as to solve
Topic.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structural representation for refrigeration unit that embodiments of the invention provide；
Fig. 2 is the control method flow chart before the compressor for the refrigeration unit that embodiments of the invention provide is opened；
Fig. 3 is the control method flow chart during the compressor operating for the refrigeration unit that embodiments of the invention provide；
Control method flow chart before the compressor shutdown for the refrigeration unit that Fig. 4 provides for embodiments of the invention；
Fig. 5 is the control method flow chart during the compressor shutdown for the refrigeration unit that embodiments of the invention provide；
Fig. 6 is the structural representation of the control system for the refrigeration unit that embodiments of the invention provide.
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.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The embodiment provides a kind of refrigeration unit, especially a kind of low temperature refrigerator group.
With reference to figure 1, the refrigeration unit in the present embodiment include oil eliminator 1, compressor 2, oil cooler 3, condenser 4,
Cooling tower 5 and recuperation of heat case 6, wherein, cooling tower 5 is used to cool down the refrigeration oil in oil cooler 3 and condenser 4, heat
Collection box 6 is used to collect oil cooler 3 and the heat of the refrigeration oil in condenser 4, and using the heat collected to oil cooler 3
Heated with the refrigeration oil in condenser 4, there is at least one heater 10 heated to refrigeration oil in oil eliminator 1
With the temperature sensor 11 of detection freezing oil temperature.
In addition, also there is oil return solenoid valve 20 and temperature sensor 21, oil return solenoid valve on the pipeline being connected with compressor 2
20 refrigeration oils being used in control piper are transferred in compressor 2, and temperature sensor 21 is used to detect the freezing into compressor 2
The temperature of oil.Wherein, oil return solenoid valve 20 is with compressor 2 with opening with pass, i.e., when compressor 2 is opened, oil return solenoid valve 20 is opened,
When compressor 2 is closed, oil return solenoid valve 20 is closed.Condenser 4 is connected by tracheae B1 with oil eliminator 1, and oil eliminator 1 passes through
Tracheae B2 is connected with compressor 2, to realize the transmission of refrigerant.
In an embodiment of the present embodiment, refrigeration unit also includes and oil cooler 3 and the feed liquor of condenser 4
First pipeline A1 of mouthful connection, the second pipeline A2, fuel-displaced with oil eliminator 1 being connected with oil cooler 3 and the liquid outlet of condenser 4
3rd pipeline A3 of mouth connection.
Wherein, having on the first pipeline A1 has the second control valve A22 on the first control valve A11, the second pipeline A2, and the 3rd
Closing on the A3 of road has the 3rd control valve A33.Also, there is water pump on the first pipeline A1, the coolant in cooling tower 5 is conveyed
Into oil cooler 3 and condenser 4.
First control valve A11 is used to control the pipeline A4 being connected with the liquid outlet of cooling tower 5 to connect with the first pipeline A1, or
The pipeline A5 that person's control is connected with the liquid outlet of recuperation of heat case 6 connects with the first pipeline A1.Second control valve A22 is used to control the
Two pipeline A2 and the pipeline A6 connections being connected with the inlet of cooling tower 5, or the second pipeline A2 of control and enter with recuperation of heat case 6
The pipeline A7 connections of liquid mouth connection.
When pipeline A4 connects with the first pipeline A1 and pipeline A6 is connected with the second pipeline A2, the coolant in cooling tower 5
As cold water cools down to the refrigeration oil in oil cooler 3 and condenser 4；When pipeline A5 is connected and pipeline with the first pipeline A1
When A7 connects with the second pipeline A2, liquid such as hot water in recuperation of heat case 6 enter to the refrigeration oil in oil cooler 3 and condenser 4
Row heating.
3rd control valve A33 is used to control the 3rd pipeline A3 and the pipeline A8 being connected with compressor 2 connections, so that the 3rd pipe
Road A3 directly connects with compressor 2, or control the 3rd pipeline A3 with and oil cooler 3 oil inlet be connected pipeline A9 company
It is logical, so that the 3rd pipeline A3 is connected by oil cooler 3 with compressor 2.
Wherein, the pipeline A4 and the first pipeline A1 being connected by the first control valve A11 controls with the liquid outlet of cooling tower 5 connect
It is logical, control the second pipeline A2 and the pipeline A7 being connected with the inlet of recuperation of heat case 6 to connect by the second control valve A22, to control
Heating collection box 6 is collected to the heat of the refrigeration oil in oil cooler 3 and condenser 4.Preferably, in the present embodiment
One control valve A11, the second control valve A22 and the 3rd control valve A33 are electric T-shaped valve.
In the present embodiment, cooling tower 5 and recuperation of heat case 6 share the first pipeline A1 and the second pipeline A2, but the present invention is simultaneously
This is not limited only to, in other embodiments, cooling tower 5 can be connected using single loop with oil cooler 3 and condenser 4,
Recuperation of heat case 6 can also be connected using single loop with oil cooler 3 and condenser 4.In addition, in the present embodiment, cooling tower 5
In coolant be water, the circulating liquid in recuperation of heat case 6 is also water, but the present invention is not limited to this, in other implementations
In example, other liquid that can absorb heat with heat release can be used.
The refrigeration unit that the present embodiment provides, when the temperature of refrigeration oil is higher in oil eliminator, can control oily separation
Refrigeration oil in device is directly transferred to compressor, even if now cooling tower is cold to the refrigeration oil progress in oil cooler and condenser
But it is that refrigeration unit keeps certain water-carrying capacity, the heating effect of refrigeration oil will not be also impacted；It is cold in oil eliminator
When the temperature of frozen oil is relatively low, the refrigeration oil in oil eliminator can be controlled to be transmitted by oil cooler to compressor, can now be led to
Overheat collection box or recuperation of heat case and heater heat to the refrigeration oil in oil cooler and condenser, so as to solve
Simple the problem of using power consumption height caused by electrical heating heating frozen oil and heating effect difference.
Embodiments of the invention additionally provide a kind of control method of refrigeration unit, the system provided applied to above-described embodiment
Cold group, as shown in Fig. 2 before the compressor 2 of refrigeration unit as described above is opened, the refrigeration unit of the present embodiment offer
Control method include：
S201：Judge whether the temperature of refrigeration oil in oil eliminator 1 is less than the first preset temperature, if it is not, into S202, if
It is, into S203；
S202：Refrigeration oil in control oil eliminator 1 is directly transferred to compressor 2, control cooling tower 5 to oil cooler 3
Cooled down with the refrigeration oil in condenser 4, control compressor 2 to open；
S203：Refrigeration oil in control oil eliminator 1 is transmitted to compressor 2, control recuperation of heat case 6 by oil cooler 3
Refrigeration oil in oil cooler 3 and condenser 4 is heated, and enters step S204；
S204：Judge whether the temperature of the refrigeration oil in oil eliminator 1 is less than the second preset temperature, the second preset temperature is big
In the first preset temperature, if it is not, into step S205, if so, into step S206；
S205：Control compressor 2 is opened, controls cooling tower 5 cold to the refrigeration oil progress in oil cooler 3 and condenser 4
But, the refrigeration oil in oil eliminator 1 is controlled to be directly transferred to compressor 2；
S206：Control heater 10 is opened, and when the temperature of refrigeration oil is higher than the second preset temperature, controls heater 10
Close, control compressor 2 is opened, controls cooling tower 5 to cool down the refrigeration oil in oil cooler 3 and condenser 4；
Wherein, when cooling tower 5 cools down to the refrigeration oil in oil cooler 3 and condenser 4, the stopping pair of recuperation of heat case 6
Refrigeration oil in oil cooler 3 and condenser 4 is heated；Recuperation of heat case 6 is to the refrigeration oil in oil cooler 3 and condenser 4
When being heated, cooling tower 5 stops cooling down the refrigeration oil in oil cooler 3 and condenser 4.
Specifically, before the unlatching of compressor 2, water pump need to first be opened, then according to the detection knot of temperature sensor 10
Fruit judges whether the temperature of refrigeration oil in oil eliminator 1 is less than the first preset temperature, if the temperature of refrigeration oil is high in oil eliminator 1
In the first preset temperature, illustrate that the temperature of refrigeration oil is adapted to start shooting and will not incorporate refrigerant, now can control compressor 2 to open,
Connected by the first control valve A11 control pipers A4 and the first pipeline A1, pass through the second control valve A22 control pipers A6 and second
Pipeline A2 is connected, and the cold water in cooling tower 5 is returned to after entering oil cooler 3 and condenser 4 in cooling tower 5, so that cooling tower 5
Refrigeration oil in oil cooler 3 and condenser 4 is cooled down, so that refrigeration unit keeps certain water-carrying capacity or antifreeze, together
When by the 3rd control valve A33 control pipers A8 and the 3rd pipeline A3 connect, the refrigeration oil in control oil eliminator 1 is directly passed
Compressor 2 is transported to, in case the cold water that cooling tower 5 is flowed into oil eliminator 1 reduces the temperature of refrigeration oil；
If the temperature of refrigeration oil is less than the first preset temperature in oil eliminator 1, the 3rd is controlled by the 3rd control valve A33
Pipeline A3 connects with pipeline A9, so that the refrigeration oil in oil eliminator 1 is transmitted to compressor 2 by oil cooler 3, passes through first
Control valve A11 controls the first pipeline A1 to be connected with pipeline A5, controls the second pipeline A2 and pipeline A7 to connect by the second control valve A22
It is logical, the hot water in recuperation of heat case 6 is returned to after entering in oil cooler 3 and condenser 4 in recuperation of heat case 6, so that recuperation of heat case 6
Refrigeration oil in oil cooler 3 and condenser 4 is heated；Judge afterwards the refrigeration oil in oil eliminator 1 temperature whether
Less than the second preset temperature, the second preset temperature is more than the first preset temperature, if being higher than the second preset temperature, controls compressor
2 are opened, if being less than the second preset temperature, control heater 10 is opened, and the refrigeration oil in oil eliminator 1 is heated, and
Persistently judge whether the temperature of the refrigeration oil in oil eliminator 1 is less than the second preset temperature, be higher than second in the temperature of refrigeration oil
During preset temperature, control heater 10 is closed, and control compressor 2 is opened, while controls the first pipeline by the first control valve A11
A1 connects with pipeline A4, controls the second pipeline A2 to be connected with pipeline A6 by the second control valve A22, so that cooling tower 5 is to oil cooling
But the refrigeration oil in device 3 and condenser 4 is cooled down, i.e., during compressor 2 works, is lowered into the cold of compressor 2
The temperature of frozen oil.
Because the first control valve A11 controls the first pipeline A1 to be connected with pipeline A4, the second control valve A22 controls the second pipeline
After A2 connects with pipeline A6, the first pipeline A1 and the second pipeline A2 disconnect with recuperation of heat case 6, and therefore, recuperation of heat case 6 stops to oil
Refrigeration oil in cooler 3 and condenser 4 is heated.Similarly, when the first control valve A11 controls the first pipeline A1 and pipeline A5
Connection, the second control valve A22 are controlled after the second pipeline A2 connects with pipeline A7, the pipeline of cooling tower 5 and the first pipeline A1 and the
Two pipeline A2 disconnect, and cooling tower 5 stops cooling down the refrigeration oil in oil cooler 3 and condenser 4.
Further, as shown in figure 3, during compressor 2 is run, the controlling party of the refrigeration unit in the present embodiment
Method also includes：
S301：Judge whether the temperature of refrigeration oil in oil eliminator 1 is less than the 3rd preset temperature, if so, into step
S302, if it is not, into step S303；
S302：Refrigeration oil in control oil eliminator 1 is directly transferred to compressor 2；
S303：Judge whether the temperature of refrigeration oil in oil eliminator 1 is less than the 4th preset temperature, the 4th preset temperature is more than
3rd preset temperature, if so, into step S304, if it is not, into step S305；
S304：A part of refrigeration oil in control oil eliminator 1 is transmitted to compressor 2, another part by oil cooler 3
Refrigeration oil is directly transferred to compressor 2；
S305：Judge whether the temperature of refrigeration oil in oil eliminator 1 is higher than the 5th preset temperature, the 5th preset temperature is more than
4th preset temperature, if it is not, current state is kept, if so, into step S306；
S306：Refrigeration oil in control oil eliminator 1 is transmitted to compressor 2 by oil cooler 3.
Specifically, during compressor 2 is run, oil eliminator 1 is judged according to the testing result of temperature sensor 10
Whether the temperature of middle refrigeration oil is less than the 3rd preset temperature, if being less than the 3rd preset temperature, passes through the 3rd control valve A33 controls the
Three pipeline A3 connect with pipeline A8, so that the refrigeration oil in oil eliminator 1 is directly transferred to compressor 2, if default higher than the 3rd
Temperature, judges whether the temperature of refrigeration oil in oil eliminator 1 is less than the 4th preset temperature, and it is default that the 4th preset temperature is more than the 3rd
Temperature, if being less than the 4th preset temperature, the 3rd pipeline A3 is controlled to connect simultaneously with pipeline A8 and pipeline A9 by the 3rd control valve A33
It is logical so that a part of refrigeration oil in oil eliminator 1 transmitted by oil cooler 3 it is direct to compressor 2, another part refrigeration oil
Transmit to compressor 2, if being higher than the 4th preset temperature, determine whether the temperature of refrigeration oil in oil eliminator 1 whether higher than the
Five preset temperatures, the 5th preset temperature are more than the 4th preset temperature, if being higher than the 5th preset temperature, pass through the 3rd control valve A33
The 3rd pipeline A3 is controlled to be connected with pipeline A9, so that the refrigeration oil in oil eliminator 1 is transmitted to compressor 2 by oil cooler 3.
In addition, during compressor 2 is run, also need to judge refrigeration unit recuperation of heat case 6 whether with oil cooler 3
Whether connected with condenser 4；If so, then controlling the first pipeline A1 to be connected with pipeline A4 by the first control valve A11, pass through second
Control valve A22 controls the second pipeline A2 to be connected with pipeline A7, so that the cold water in cooling tower 5 is from oil cooler 3 and condenser 4
After absorbing heat, store in recuperation of heat case 6；If it is not, then the first pipeline A1 and pipeline A4 is controlled to connect by the first control valve A11
It is logical, control the second pipeline A2 to be connected with pipeline A6 by the second control valve A22, so that cooling tower 5 is to oil cooler 3 and condenser
Refrigeration oil in 4 is cooled down.
As shown in figure 4, before the shutdown of compressor 2, the control method of the refrigeration unit in the present embodiment also includes：
S401：Judge whether compressor 2 meets to shut down to require, if so, then enter S402, if it is not, then it is lasting judge up to
Meet after shutting down requirement, into S402；
S402：Control compressor 2 is closed, and controls the refrigeration oil in oil eliminator 1 to be directly transferred to compressor 2.It is i.e. logical
Crossing the 3rd control valve A33 controls the 3rd pipeline A3 to be connected with pipeline A8, so that the refrigeration oil in oil eliminator 1 is directly transferred to press
Contracting machine 2.
As shown in figure 5, during compressor 2 is shut down, the control method of the refrigeration unit in the present embodiment also includes：
S501：Refrigeration oil in control oil eliminator 1 is directly transferred to compressor 2, and enters S502；
S502：Judge whether the temperature of the refrigeration oil in oil eliminator 1 is less than the 6th preset temperature, if so, into S503,
If it is not, into S504；
S503：Heater；
S504：Judge whether the temperature of the refrigeration oil in oil eliminator 1 is higher than the 7th preset temperature, if it is not, into S505；
S505：Heater, and when the temperature of the refrigeration oil in oil eliminator 1 is higher than seven preset temperatures, close
Heater.
Specifically, during compressor 2 is shut down, the 3rd pipeline A3 and pipeline A8 is controlled by the 3rd control valve A33
Connection, so that the refrigeration oil in oil eliminator 1 is directly transferred to compressor 2, judges the temperature of the refrigeration oil in oil eliminator 1 afterwards
Whether degree is less than the 6th preset temperature, if so, heater, if it is not, judge the refrigeration oil in oil eliminator 1 temperature whether
Higher than the 7th preset temperature, if it is not, heater, and the temperature of the refrigeration oil in oil eliminator 1 is higher than the 7th default temperature
When spending, heater is closed.
The concrete numerical value of the first preset temperature to the 7th preset temperature is the Cryo Refrigerator according to reality in the present embodiment
What the operational factor of group was set, to enable the control method in the present invention to better adapt to low temperature refrigerator group not
With the concrete application under environment, therefore, the present invention is not carried out to the concrete numerical value of the first preset temperature to the 7th preset temperature
Limit.
In addition, hand stop valve can be increased on pipeline A8 and pipeline A9, the aperture of pipeline on the one hand can be adjusted manually
And flow, the 3rd control valve A33 work on the other hand can be substituted in the case of debugging or in emergency circumstances.
The control method for the refrigeration unit that the present embodiment provides, is connected in recuperation of heat case 6 with oil cooler 3 and condenser 4
When, the heat of condenser 4 and the heat of oil cooler 3 when refrigeration unit is run are collected by recirculated water, and by after collection heat
Hot water concentrate be stored in recuperation of heat case 6, refrigeration oil is heated with the hot water in later use.Shut down in refrigeration unit
When, heater 11 is judged whether according to preset temperature, so as to by Oil-temperature control within the specific limits, effectively to save
Power consumption.Before refrigeration unit start, oil cooler 3 is heated by the hot water in recuperation of heat case 6, on the one hand accelerates heating
The effect of oil temperature, still further aspect improve the water temperature in condenser 4, are advantageous to establish pressure difference rapidly during start.Transported in compressor 2
It is by detecting oil temperature and to the first control valve A11 to the 3rd control valve A33, Oil-temperature control is more suitable at one during row
In stable scope.
Embodiments of the invention additionally provide a kind of control system of refrigeration unit, the system provided applied to above-described embodiment
Cold group, as shown in fig. 6, the control system of the refrigeration unit in the present embodiment includes judging control module 1, the first control module
2nd, the second control module 3, the 3rd control module 4 and the 4th control module 5.
Wherein, judge that control module 1 is used for before the unlatching of compressor 2, judging the temperature of refrigeration oil in oil eliminator 1 is
It is no to be less than the first preset temperature, if it is not, sending the first control instruction to the first control module 2, sending the second control instruction to the
Two control modules 3, the 3rd control instruction to the 3rd control module 4 is sent, if so, sending the 4th control instruction to the second control mould
Block 3, send the 5th control instruction to the 3rd control module 4, judge whether the temperature of the refrigeration oil in oil eliminator 1 is less than second
Preset temperature, the second preset temperature are more than the first preset temperature, if it is not, the first control instruction is sent to the first control module 2, if
It is to send the 6th control instruction to the 4th control module 5, and continues to judge the temperature of refrigeration oil whether less than the second default temperature
Degree, if it is not, sending the first control instruction to the first control module 2, sending the 3rd control instruction to the 3rd control module 4, send
7th control instruction to the 4th control module 5；
First control module 2 is used to control compressor 2 to open after the first control instruction is received；
Second control module 3 is used to control the refrigeration oil in oil eliminator 1 directly to pass after receiving the second control instruction
Transport to compressor 2, after receiving the 4th control instruction control oil eliminator 1 in refrigeration oil by oil cooler 3 transmit to
Compressor 2；
3rd control module 4 is used to control cooling tower 5 after the 3rd control instruction is received to oil cooler 3 and condenser
Refrigeration oil in 4 is cooled down, controls recuperation of heat case 6 to stop heating the refrigeration oil in oil cooler 3 and condenser 4, is received
Recuperation of heat case 6 is controlled to stop the refrigeration oil heating in oil cooler 3 and condenser 4, control cooling tower 5 after to the 5th control instruction
Only the refrigeration oil in oil cooler 3 and condenser 4 is cooled down；
4th control module 5 is used to control heater 11 to open after the 6th control instruction is received, and is receiving the 7th
Heater 11 is controlled to close after control instruction.
Further, judge that control module 1 is additionally operable to during compressor 2 is run, judging the temperature of refrigeration oil is
It is no to be less than the 3rd preset temperature, if so, the second control instruction is sent to the second control module 3, if it is not, judging the temperature of refrigeration oil
Whether the 4th preset temperature is less than, the 4th preset temperature is more than the 3rd preset temperature, if so, sending the 8th control instruction to second
Control module 3, if it is not, judging whether the temperature of refrigeration oil is higher than the 5th preset temperature, it is default that the 5th preset temperature is more than the 4th
Temperature, if so, sending the 4th control instruction to the second control module 3；
3 second control modules are additionally operable to after the 8th control instruction is received, and control the part freezing in oil eliminator 1
Oil is transmitted to compressor 2, another part refrigeration oil by oil cooler 3 is directly transferred to compressor 2.
Further, judge that control module 1 is additionally operable to during compressor 2 is run, send the 3rd control instruction extremely
3rd control module 4, or, send the 9th control instruction to the 3rd control module 4；
3rd control module 4 is additionally operable to control recuperation of heat case to oil cooler and condenser after receiving the 9th control instruction
In the heat of refrigeration oil be collected.
Further, judge that control module 1 is additionally operable to when compressor 2 is shut down, send the tenth control instruction to the first control
Molding block 2, and send the second control instruction to the second control module 3；
First control module 2 is additionally operable to after the tenth control instruction is received, and control compressor 2 is closed.
Further, judge that control module 1 is additionally operable to during compressor 2 is shut down, send the second control instruction extremely
Second control module 3, and judge whether the temperature of refrigeration oil is less than the 6th preset temperature, if so, sending the 6th control instruction extremely
4th control module 5, if it is not, judging whether the temperature of refrigeration oil is higher than the 7th preset temperature, if it is not, sending the 6th control instruction
To the 4th control module 5, and when the temperature of refrigeration oil is higher than seven preset temperatures, the 7th control instruction is sent to the 4th control
Module 5.
Specifically, the second control module 3 in the present embodiment controls the 3rd pipeline A3 and pipeline by the 3rd control valve A33
A8 is connected, and to make the refrigeration oil in control oil eliminator 1 be directly transferred to compressor 2, the 3rd is controlled by the 3rd control valve A33
Pipeline A3 connects with pipeline A9, to make the refrigeration oil in oil eliminator 1 be transmitted by oil cooler 3 to compressor 2.
3rd control module 4 controls the first pipeline A1 to be connected with pipeline A4 by the first control valve A11, passes through the second control
Valve A22 controls the second pipeline A2 to be connected with pipeline A6, to make cooling tower 5 carry out the refrigeration oil in oil cooler 3 and condenser 4
Cooling；Control the first pipeline A1 to be connected with pipeline A5 by the first control valve A11, pass through the pipe of the second control valve A22 controls second
Road A2 connects with pipeline A7, to make recuperation of heat case 6 heat the refrigeration oil in oil cooler 3 and condenser 4；Pass through the first control
Valve A11 controls the first pipeline A1 to be connected with pipeline A4, controls the second pipeline A2 to be connected with pipeline A7 by the second control valve A22,
To make recuperation of heat case 6 be collected the heat of the refrigeration oil in oil cooler and condenser.
The control system for the refrigeration unit that the present embodiment provides, is connected in recuperation of heat case 6 with oil cooler 3 and condenser 4
When, the heat of condenser 4 and the heat of oil cooler 3 when refrigeration unit is run are collected by recirculated water, and by after collection heat
Hot water concentrate be stored in recuperation of heat case 6, refrigeration oil is heated with the hot water in later use.Shut down in refrigeration unit
When, heater 11 is judged whether according to preset temperature, so as to by Oil-temperature control within the specific limits, effectively to save
Power consumption.Before refrigeration unit start, oil cooler 3 is heated by the hot water in recuperation of heat case 6, on the one hand accelerates heating
The effect of oil temperature, still further aspect improve the water temperature in condenser 4, are advantageous to establish pressure difference rapidly during start.Transported in compressor 2
It is by detecting oil temperature and to the first control valve A11 to the 3rd control valve A33, Oil-temperature control is more suitable at one during row
In stable scope.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, 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 principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (12)
1. a kind of refrigeration unit, it is characterised in that including oil eliminator, compressor, oil cooler, condenser, cooling tower and heat
Collection box, has the heater heated to refrigeration oil in the oil eliminator and detects the temperature of the freezing oil temperature and pass
Sensor；
The oil eliminator is used to refrigeration oil being directly transferred to the compressor, or, by the oil cooler by described in
Refrigeration oil is transmitted to the compressor；
The refrigeration oil used for cooling tower in the oil cooler and condenser cools down；
The recuperation of heat case is used for the heat for collecting the refrigeration oil in the oil cooler and condenser, and utilizes the heat pair
Refrigeration oil in the oil cooler and condenser is heated；
Wherein, when the cooling tower cools down to the refrigeration oil in the oil cooler and condenser, the recuperation of heat case stops
Only the refrigeration oil in the oil cooler and condenser is heated；The recuperation of heat case is to the oil cooler and condenser
In refrigeration oil when being heated, the cooling tower stops cooling down the refrigeration oil in the oil cooler and condenser.
2. refrigeration unit according to claim 1, it is characterised in that the refrigeration unit also includes and the oil cooler
The first pipeline for being connected with the inlet of the condenser, be connected with the liquid outlet of the oil cooler and the condenser
Two pipelines, the 3rd pipeline being connected with the oil eliminator oil-out；
There is the first control valve on first pipeline, there is the second control valve on second pipeline, on the 3rd pipeline
With the 3rd control valve；
First control valve is used for the liquid outlet for controlling the cooling tower and first pipeline connection, so that the cooling tower
In coolant enter in the oil cooler and condenser, or the liquid outlet of the control recuperation of heat case and the described first pipe
Road connects, so that the liquid in the recuperation of heat case enters in the oil cooler and condenser；
Second control valve is used to control second pipeline to connect with the inlet of the cooling tower or recuperation of heat case；
3rd control valve is used to control the 3rd pipeline directly to connect with the compressor, or control the 3rd pipe
Road is connected by the oil cooler with the compressor；
Wherein, the liquid outlet of the cooling tower and first pipeline connection are controlled by first control valve, by described
Second control valve controls second pipeline to be connected with the inlet of the recuperation of heat case, to control the recuperation of heat case to described
The heat of refrigeration oil in oil cooler and condenser is collected.
3. a kind of control method of refrigeration unit, it is characterised in that described applied to the refrigeration unit described in claim 1 or 2
Control method includes：
Before compressor unlatching, judge whether the temperature of refrigeration oil in the oil eliminator is less than the first preset temperature；
If it is not, the refrigeration oil in the oil eliminator is controlled to be directly transferred to the compressor, the control cooling tower to described
Refrigeration oil in oil cooler and condenser is cooled down, controls the compressor to open；
If so, the refrigeration oil in the oil eliminator is controlled to be transmitted by the oil cooler to described in the compressor, control
Recuperation of heat case heats to the refrigeration oil in the oil cooler and condenser；
Judge whether the temperature of the refrigeration oil in the oil eliminator is less than the second preset temperature, second preset temperature is more than
First preset temperature, if it is not, control compressor is opened, controls the cooling tower in the oil cooler and condenser
Refrigeration oil is cooled down, controls the refrigeration oil in the oil eliminator to be directly transferred to the compressor, is added if so, control is described
Hot device is opened, and when the temperature of the refrigeration oil is higher than second preset temperature, controls the heater to close, control institute
State compressor open, control the cooling tower to cool down the refrigeration oil in the oil cooler and condenser, control it is described
Refrigeration oil in oil eliminator is directly transferred to the compressor.
4. according to the method for claim 3, it is characterised in that the control method also includes：
During the compressor operating, judge whether the temperature of the refrigeration oil is less than the 3rd preset temperature；
If so, the refrigeration oil in the oil eliminator is controlled to be directly transferred to the compressor；
If it is not, judging whether the temperature of the refrigeration oil is less than the 4th preset temperature, it is pre- that the 4th preset temperature is more than the 3rd
If temperature；
If so, a part of refrigeration oil in the oil eliminator is controlled to be transmitted to the compressor, separately by the oil cooler
A part of refrigeration oil is directly transferred to the compressor；
If it is not, judge whether the temperature of the refrigeration oil is higher than the 5th preset temperature, the 5th preset temperature is more than described the
Four preset temperatures, if so, controlling the refrigeration oil in the oil eliminator to be transmitted by the oil cooler to the compressor.
5. according to the method for claim 4, it is characterised in that the control method also includes：
During the compressor operating, the recuperation of heat case is controlled to collect the freezing in the oil cooler and condenser
The heat of oil, or, control the cooling tower to cool down the refrigeration oil in the oil cooler and condenser.
6. according to the method for claim 3, it is characterised in that the control method also includes：
In the compressor shutdown, control compressor is closed and controls the refrigeration oil in the oil eliminator to be directly transferred to institute
State compressor.
7. according to the method for claim 3, it is characterised in that the control method also includes：
During the compressor shutdown, the refrigeration oil in the oil eliminator is controlled to be directly transferred to the compressor,
And judge whether the temperature of the refrigeration oil is less than the 6th preset temperature, if so, heater, if it is not, judging the freezing
Whether the temperature of oil is higher than the 7th preset temperature, if it is not, heater, and it is default higher than the 7th in the temperature of the refrigeration oil
During temperature, heater is closed.
8. a kind of control system of refrigeration unit, it is characterised in that described applied to the refrigeration unit described in claim 1 or 2
Control system includes：
Judge control module, for the compressor unlatching before, judge refrigeration oil in the oil eliminator temperature whether
Less than the first preset temperature, if it is not, sending the first control instruction to the first control module, sending the second control instruction to the second control
Molding block, the 3rd control instruction to the 3rd control module is sent, if so, sending the 4th control instruction to the second control module, hair
Send the 5th control instruction to the 3rd control module and judge whether the temperature of the refrigeration oil in the oil eliminator is pre- less than second
If temperature, second preset temperature is more than first preset temperature, if it is not, then sending first control instruction to first
Control module, send the 3rd control instruction to the 3rd control module, send second control instruction to described the
Two control modules, if so, then sending the 6th control instruction to the 4th control module, and continue to judge that the temperature of the refrigeration oil is
It is no to be less than the second preset temperature, if it is not, sending first control instruction to first control module, transmission the 3rd control
System instructs to the 3rd control module, sends the 7th control instruction to the 4th control module, transmission second control instruction
To second control module；
First control module is used to control compressor to open after first control instruction is received；
Second control module is used to control the refrigeration oil in oil eliminator direct after receiving second control instruction
Transmit to the compressor, the refrigeration oil in the oil eliminator is controlled after receiving the 4th control instruction passes through described
Oil cooler is transmitted to the compressor；
3rd control module be used to controlling cooling tower to the oil cooler after the 3rd control instruction is received and
Refrigeration oil in condenser is cooled down, controls recuperation of heat case to stop adding the refrigeration oil in the oil cooler and condenser
Heat, receive control after the 5th control instruction recuperation of heat case to the refrigeration oil heating in the oil cooler and condenser,
Control cooling tower stops cooling down the refrigeration oil in the oil cooler and condenser；
4th control module is used to control heater to open after the 6th control instruction is received, described receiving
Heater is controlled to close after 7th control instruction.
9. the control system of refrigeration unit according to claim 8, it is characterised in that the judgement control module is additionally operable to
During the compressor operating, judge whether the temperature of the refrigeration oil is less than the 3rd preset temperature, if so, sending institute
The second control instruction is stated to the second control module, if it is not, judging whether the temperature of the refrigeration oil is less than the 4th preset temperature, institute
State the 4th preset temperature and be more than the 3rd preset temperature, if so, the 8th control instruction to the second control module is sent, if it is not, judging
Whether the temperature of the refrigeration oil is higher than the 5th preset temperature, and the 5th preset temperature is more than the 4th preset temperature, if
It is to send the 4th control instruction to the second control module；
Second control module is additionally operable to after the 8th control instruction is received, and controls one in the oil eliminator
Point refrigeration oil is transmitted to the compressor, another part refrigeration oil by the oil cooler is directly transferred to the compressor.
10. the control system of refrigeration unit according to claim 9, it is characterised in that the judgement control module is also used
During the compressor operating, the 3rd control instruction is sent to the 3rd control module, or, send the 9th control
System is instructed to the 3rd control module；
3rd control module is additionally operable to control the recuperation of heat case to the oil cooler after receiving the 9th control instruction
It is collected with the heat of the refrigeration oil in condenser.
11. the control system of refrigeration unit according to claim 8, it is characterised in that the judgement control module is also used
When in the compressor shutdown, the tenth control instruction is sent to the first control module, and send second control instruction extremely
Second control module；
First control module is additionally operable to after the tenth control instruction is received, and control compressor is closed.
12. the control system of refrigeration unit according to claim 8, it is characterised in that the judgement control module is also used
During the compressor shutdown, transmission second control instruction judges the freezing to the second control module
Whether the temperature of oil is less than the 6th preset temperature, if so, the 6th control instruction is sent to the 4th control module, if it is not, sentencing
Whether the temperature for the refrigeration oil of breaking is higher than the 7th preset temperature, if it is not, sending the 6th control instruction to the 4th control mould
Block, and when the temperature of the refrigeration oil is higher than seven preset temperatures, send the 7th control instruction to the 4th control module.
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| CN108072198B (en) * | 2016-11-16 | 2020-09-18 | 艾默生环境优化技术(苏州)有限公司 | Compressor assembly, control method thereof and refrigerating/heating system |
| CN110006193B (en) * | 2019-03-25 | 2020-05-22 | 珠海格力电器股份有限公司 | Air conditioning system and compressor oil temperature adjusting device used by same |
| CN110006194A (en) * | 2019-04-09 | 2019-07-12 | 珠海格力电器股份有限公司 | Air-conditioning system and its control method with drop oil temperature and anti-hydrops function |
| CN112303862B (en) * | 2020-10-09 | 2023-03-28 | 青岛海尔空调电子有限公司 | Oil temperature control system and method for refrigeration oil in air-conditioning compressor |
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| JP2009243767A (en) * | 2008-03-31 | 2009-10-22 | Sanden Corp | Cold system |
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