CN105444448B - refrigeration system and its control method - Google Patents
refrigeration system and its control method Download PDFInfo
- Publication number
- CN105444448B CN105444448B CN201510993639.9A CN201510993639A CN105444448B CN 105444448 B CN105444448 B CN 105444448B CN 201510993639 A CN201510993639 A CN 201510993639A CN 105444448 B CN105444448 B CN 105444448B
- Authority
- CN
- China
- Prior art keywords
- pressure
- compressor
- valve
- bypass circulation
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- F25B1/00—Compression machines, plants or systems with non-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
- 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
- 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
- F25B49/022—Compressor control 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0401—Refrigeration circuit bypassing means for the 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
- F25B2500/00—Problems to be solved
- F25B2500/31—Low ambient 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
-
- 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
Abstract
The invention discloses a kind of refrigeration system and its control method, the refrigeration system includes joining end to end successively to form the compressor in loop, condenser, throttling arrangement and evaporator, bypass circulation and control valve group.The first end of bypass circulation is connected between the exhaust outlet of compressor and condenser and the second end is connected between throttling arrangement and evaporator, and control valve group is for controlling the exhaust of compressor to selectively flow through one in bypass circulation and condenser.According to the refrigeration system of the present invention, refrigeration system can be preheated by the bypass circulation of setting so that refrigeration system can normally start, and by control valve group the exhaust of compressor can be controlled to selectively flow through one in bypass circulation and condenser according to the environment temperature of outside, it is possible thereby to make refrigeration system start in the environment of low temperature and stably, reliability service.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly, to a kind of refrigeration system and its control method.
Background technology
In correlation technique, air conditioner in machine room is a kind of air conditioner for the series special for requiring all-weather safety reliability service.
The higher area of latitude, its winter outside air temperature is very low, and at this moment air conditioner in machine room stills need to carry out refrigeration demand, and now right
In in general refrigerant system design, unit possibly can not start, it is impossible to operation refrigeration.And a part of computer room sky of the prior art
Although tune can solve cold-starting and operation problem, its application relative narrower, can only accomplish to open in the case of -35 °
Move and run, when temperature is low again, such as -40 DEG C of outdoor environment temperatures, can not ensure that unit can start simultaneously reliability service.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention carries
Go out a kind of refrigeration system, the refrigeration system can start in the environment of ultralow temperature and reliability service.
The present invention also proposes a kind of control method with above-mentioned refrigeration system.
The refrigeration system of embodiment according to a first aspect of the present invention, including：Join end to end successively to form the compression in loop
Machine, condenser, throttling arrangement and evaporator；Bypass circulation, the first end of the bypass circulation are connected to the row of the compressor
Between gas port and the condenser and the second end is connected between the throttling arrangement and the evaporator；Control valve group, it is described
Control valve group is for controlling the exhaust of the compressor to selectively flow through one in the bypass circulation and the condenser.
Refrigeration system according to embodiments of the present invention, by the bypass circulation of setting refrigeration system can be preheated with
Refrigeration system is normally started, the exhaust of compressor is controlled by the control valve group of setting after refrigeration system startup optimization
Condenser is flowed through, so as to so that refrigeration system normal work；And it is possible to control valve group is passed through according to the environment temperature of outside
The exhaust of control compressor selectively flows through one in bypass circulation and condenser, with the operating pressure in holding system,
It is possible thereby to make refrigeration system stable, reliability service in the environment of low temperature.
According to some embodiments of the invention, the refrigeration system also includes：Compressor parallel pipeline, the compressor parallel
The first end of pipeline is connected between the air entry of the compressor and the evaporator and the second end is connected to the compressor
Exhaust outlet and the bypass circulation first end between；Evaporating pressure regulating valve, the evaporating pressure regulating valve are located at described
On compressor parallel pipeline, the evaporating pressure regulating valve is configured to when the pressure of inspiration(Pi) of the compressor is predetermined less than first
The compressor parallel pipeline is turned on during value and when the pressure of inspiration(Pi) of the compressor is greater than or equal to the first predetermined value
Block the compressor parallel pipeline.
According to some embodiments of the invention, the refrigeration system also includes reservoir, and there is the reservoir reservoir to enter
Mouth and reservoir outlet, the reservoir import are connected with the outlet of the condenser, the reservoir outlet and the throttling
The entrance of device is connected.
Further, the refrigeration system also includes device for drying and filtering, and the device for drying and filtering is connected on the reservoir
Between outlet and the entrance of the throttling arrangement.
According to some embodiments of the invention, the control valve group includes：First magnetic valve, first magnetic valve are located at institute
State on bypass circulation, first magnetic valve is configured to turn on when the pressure of inspiration(Pi) of the compressor is less than second predetermined value
The bypass circulation and block described bypass back when the pressure of inspiration(Pi) of the compressor is greater than or equal to the second predetermined value
Road；First pressure triple valve, the first valve port of the first pressure triple valve are connected with the outlet of the condenser, and described first
Second valve port of pressure triple valve is connected with the reservoir import, and the 3rd valve port of the first pressure triple valve is connected to institute
State between the first end of bypass circulation and first magnetic valve.
According to some embodiments of the invention, the control valve group includes：Second solenoid valve, the second solenoid valve are located at institute
State on bypass circulation, the second solenoid valve is configured to turn on when the pressure of inspiration(Pi) of the compressor is less than third predetermined value
The bypass circulation and block described bypass back when the pressure of inspiration(Pi) of the compressor is greater than or equal to the third predetermined value
Road；Valve for pressure difference, the first end of the valve for pressure difference are connected between the first end of the bypass circulation and the second solenoid valve, institute
The second end for stating valve for pressure difference is connected with the reservoir import, and the valve for pressure difference is configured to when the pressure difference at its both ends is more than or waited
Its place pipeline is turned on when four predetermined values and pipe where its is blocked when the pressure difference at its both ends is less than four predetermined value
Road；Condensation pressure regulation valve, the condensation pressure regulation valve be connected on the condenser outlet and the reservoir import it
Between, the condensation pressure regulation valve is configured to make a reservation for when the pressure at expulsion of the exhaust outlet of the compressor is more than or equal to the 5th
Its place pipeline is turned on during value and blocks it when the pressure at expulsion of the exhaust outlet of the compressor is less than five predetermined value
Place pipeline.
According to some embodiments of the invention, the control valve group includes：3rd magnetic valve, the 3rd magnetic valve are located at institute
State on bypass circulation, the 3rd magnetic valve is configured to turn on when the pressure of inspiration(Pi) of the compressor is less than six predetermined values
The bypass circulation and block described bypass back when the pressure of inspiration(Pi) of the compressor is greater than or equal to six predetermined value
Road；Second pressure triple valve, the first valve port of the second pressure triple valve are connected with the exhaust outlet of the compressor, and described
Second valve port of two pressure triple valves is connected with the first end of the bypass circulation and the reservoir import, second pressure
3rd valve port of power triple valve is connected with the import of the condenser.
Further, check valve is also in series between the outlet of the condenser and the reservoir import, it is described unidirectional
Valve is configured to from the outlet of the condenser to the reservoir import direction one-way conduction.
The control method of the above-mentioned refrigeration system of embodiment according to a second aspect of the present invention, comprises the following steps：
S10, start the compressor；
S20, detection environment temperature, when environment temperature is less than predetermined temperature, the pressure is controlled by the control valve group
The exhaust of contracting machine enters the bypass circulation；
S20, the detection compressor pressure at expulsion, when the pressure at expulsion of the compressor is more than or equal to predetermined pressure
During value, the exhaust for controlling the compressor by the control valve group is entered in the condenser.
The control method of above-mentioned refrigeration system according to embodiments of the present invention, easily controllable and implementation, is easy to control to freeze
System realizes startup and reliability service in the environment of low temperature.
Further, before the step S10, the preheating device of the compressor is opened with to compressor progress
Preheating.
Brief description of the drawings
Fig. 1 is the schematic diagram of refrigeration system according to an embodiment of the invention；
Fig. 2 is the schematic diagram of refrigeration system in accordance with another embodiment of the present invention；
Fig. 3 is the schematic diagram according to the refrigeration system of another embodiment of the invention.
Reference：
Refrigeration system 100,
Compressor 1, exhaust outlet 101, air entry 102, bypass circulation 2, first end 201, the second end 202, condenser 3, enter
Mouth 301, outlet 302, reservoir 4, reservoir import 401, reservoir outlet 402, device for drying and filtering 5, throttling arrangement 6, entrance
601, evaporator 7, compressor parallel pipeline 8, first end 801, the second end 802, evaporating pressure regulating valve 9,
First magnetic valve 10, first pressure triple valve 11, the first valve port 111, the second valve port 112, the 3rd valve port 113,
Second solenoid valve 20, valve for pressure difference 21, first end 211, the second end 212, condensation pressure regulation valve 22,
3rd magnetic valve 30, second pressure triple valve 31, the first valve port 311, the second valve port 312, the 3rd valve port 313 are single
To valve 32.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of accompanying drawing description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that in addition, term " first ", " second " are only used for describing purpose, and
It is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define
At least one this feature can be expressed or be implicitly included to the feature of " first ", " second ".In the description of the invention, it is " more
It is individual " it is meant that at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect or can communicate each other；Can be joined directly together, can also be indirectly connected by intermediary, can be with
It is connection or the interaction relationship of two elements of two element internals, is limited unless otherwise clear and definite.For this area
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Refrigeration system 100 according to embodiments of the present invention is described below with reference to Fig. 1-Fig. 3.
As shown in Figure 1-Figure 3, the refrigeration system 100 of embodiment, including join end to end successively according to a first aspect of the present invention
To form the compressor 1 in loop, condenser 3, throttling arrangement 6 and evaporator 7, bypass circulation 2 and control valve group.
Specifically, the first end 201 of bypass circulation 2 be connected between the exhaust outlet 101 of compressor 1 and condenser 3 and
Second end 202 is connected between throttling arrangement 6 and evaporator 7.Control valve group is used to control the exhaust of compressor 1 optionally to flow
One crossed in bypass circulation 2 and condenser 3.That is, by the control of control valve group, it can make what compressor 1 was discharged
Refrigerant flows through one in bypass circulation 2 and condenser 3.
It is understood that when outdoor environment temperature is relatively low, the pressure of inspiration(Pi) of system is relatively low, in order to improve the suction of system
Atmospheric pressure and make refrigeration system 100 start work, now control valve group control compressor 1 discharge refrigerant flow through bypass circulation
2, compressor 1, bypass circulation 2, evaporator 7 form performance loop, i.e., the refrigerant that compressor 1 is discharged is not entered by condenser 3
Row condensation heat release, i.e., the refrigerant that compressor 1 is discharged flow through bypass circulation 2, evaporator 7, then flow back in compressor 1 successively
Row compression.Thus, the refrigerant that compressor 1 is discharged can preheat to refrigeration system 100, so that refrigeration system 100 can
It is normal to start.
After the 100 preheated one-section time of refrigeration system, because refrigerant not by condenser 3 but flows through bypass circulation 2
(for example, bypass circulation 2 can be a copper pipe), now the condensation efficiency of refrigeration system 100 is very low, the exhaust pressure of compressor 1
Power raises quickly.When the pressure at expulsion of compressor 1 reaches scheduled pressure value, the refrigeration of the control valve group control discharge of compressor 1
Condenser 3 is flowed through in agent, and refrigerant condenses heat release in condenser 3, and condensed refrigerant passes through the throttling expansion of throttling arrangement 6,
Then through the evaporation endothermic of evaporator 7, last cold-producing medium stream is back in compressor 1 to be compressed to form circulation cold-producing medium stream.I.e.
Now compressor 1, condenser 3, throttling arrangement 6 and evaporator 7 form performance loop, so as to which refrigeration system 100 can be carried out just
Normal refrigeration work.
During refrigeration system 100 is run, if occurring, the pressure of inspiration(Pi) of compressor 1 reduces or system end load is small
Etc. the operating mode that factor causes the reduction of system suction pressure, then the refrigerant that control valve group control compressor 1 is discharged, which flows through, to be bypassed back
Road 2, to improve the pressure of inspiration(Pi) of system.After the pressure of inspiration(Pi) of system reaches scheduled pressure value, then control valve group control compression
The cold-producing medium stream that machine 1 is discharged crosses condenser 3, and now refrigeration system 100 can continue normal work again.
Thus, according to the change of ambient temperature, the refrigerant that compressor 1 is discharged is controlled according to reality by control valve group
Border operating mode selectively flows through one in bypass circulation 2 and condenser 3, and by above-mentioned iterative cycles, the refrigeration can be made to be
System 100 is reliable upon actuation, stably runs.
Refrigeration system 100 according to embodiments of the present invention, refrigeration system 100 can be entered by the bypass circulation 2 of setting
Row is preheated so that refrigeration system 100 can normally start, and passes through the control valve group control of setting after 100 startup optimization of refrigeration system
The exhaust stream of compressor 1 processed crosses condenser 3, so as to so that the normal work of refrigeration system 100；And it is possible to according to outside
Environment temperature controls the exhaust of compressor 1 to selectively flow through one in bypass circulation 2 and condenser 3 by control valve group,
With the operating pressure in holding system, it is possible thereby to make the stable, reliability service in the environment of low temperature of refrigeration system 100.
The refrigeration system 100 and its controlling party according to the multiple embodiments of the present invention is described in detail by taking Fig. 1-Fig. 3 as an example below
Method.It is worth understanding, simply exemplary description described below, and is not considered as limiting the invention.
Embodiment one,
As shown in figure 1, in the present embodiment, refrigeration system 100 includes joining end to end successively to form the compressor in loop
1st, condenser 3, throttling arrangement 6 and evaporator 7, bypass circulation 2 and control valve group.For above-mentioned each in refrigeration system 100
The annexation of part, it is above-mentioned to be described, repeat no more here.
Further, refrigeration system 100 also includes reservoir 4 and device for drying and filtering 5.Reservoir 4 has reservoir import
401 and reservoir outlet 402, reservoir import 401 be connected with the outlet 302 of condenser 3, reservoir outlet 402 with throttling fill
Put 6 entrance 601 be connected, device for drying and filtering 5 is connected between reservoir outlet 402 and the entrance 601 of throttling arrangement 6.Thus,
The refrigerant flowed out from condenser 3 can pass through reservoir import 401 and flow into reservoir 4, and the refrigerant in reservoir 4 passes through
Reservoir outlet 402, which flows out and is dried by device for drying and filtering 5, removes moisture therein, and then refrigerant is filled by throttling
Put in 6 flow throttling device 6 of entrance 601 and carry out throttling expansion.
Specifically, the control valve group in the present embodiment includes the first magnetic valve 10 and first pressure triple valve 11.First
Magnetic valve 10 is located on bypass circulation 2, and the first magnetic valve 10 is configured to when the pressure of inspiration(Pi) of compressor 1 is less than second predetermined value
When turn on and bypass circulation 2 and block bypass circulation 2 when the pressure of inspiration(Pi) of compressor 1 is greater than or equal to second predetermined value.First
First valve port 111 of pressure triple valve 11 is connected with the outlet 302 of condenser 3, the second valve port 112 of first pressure triple valve 11
It is connected with reservoir import 401, the 3rd valve port 113 of first pressure triple valve 11 is connected to the He of first end 201 of bypass circulation 2
Between first magnetic valve 10.
It should be noted that because first pressure triple valve 11 is ratio adjusting valve, therefore first pressure triple valve 11 can
To adjust the first valve port 111 and the second valve port 112 in first pressure triple valve 11 according to the pressure of refrigerant in system stream
Aperture.
Further, refrigeration system 100 can also include compressor parallel pipeline 8 and evaporating pressure regulating valve 9.Compressor
The first end 801 of parallel pipeline 8 is connected between the air entry 102 of compressor 1 and evaporator 7 and the second end 802 is connected to pressure
Between the exhaust outlet 101 of contracting machine 1 and the first end 201 of bypass circulation 2.Evaporating pressure regulating valve 9 is located at compressor parallel pipeline 8
On, evaporating pressure regulating valve 9 is configured to turn on compressor parallel pipe when the pressure of inspiration(Pi) of compressor 1 is less than first predetermined value
Road 8 and block compressor parallel pipeline 8 when the pressure of inspiration(Pi) of compressor 1 is greater than or equal to first predetermined value.Thus, compressing
When the pressure of inspiration(Pi) of machine 1 is too low, the refrigerant that compressor 1 is discharged directly can flow back into compression by compressor parallel pipeline 8
Machine 1, so as to rapidly improve the pressure of inspiration(Pi) of compressor 1 so that the pressure of inspiration(Pi) of compressor 1 returns to normal work
Pressure.
Refrigeration system is specifically described below according to the control method of the above-mentioned refrigeration system 100 of second aspect of the present invention embodiment
The course of work of system 100.
The control method of the above-mentioned refrigeration system 100 of embodiment according to a second aspect of the present invention, comprises the following steps：
S10, start compressor 1；
S20, detection environment temperature, when environment temperature is less than predetermined temperature, the row of compressor 1 is controlled by control valve group
Gas enters bypass circulation 2；
S20, the pressure at expulsion for detecting compressor 1, when the pressure at expulsion of compressor 1 is more than or equal to scheduled pressure value,
The exhaust for controlling compressor 1 by control valve group is entered in condenser 3.
The control method of above-mentioned refrigeration system 100 according to embodiments of the present invention, easily controllable and implementation, is easy to control to make
Cooling system 100 realizes startup and reliability service in the environment of low temperature.
Further, before step S10, the preheating device of compressor 1 is opened to be preheated to compressor 1.
Specifically, when refrigeration system 100 is in low temperature environment for the first time (such as -40 DEG C low temperature environment), compression is opened
The preheating device of machine 1.After preheating device carries out the preheated one-section time to compressor 1, compressor 1 starts to start and operated.
Because the environment temperature of outside is relatively low, when refrigeration system 100 brings into operation for the first time, the pressure of inspiration(Pi) of system than relatively low, such as
When pressure of inspiration(Pi) is less than second predetermined value, the first magnetic valve 10 conducting bypass circulation 2.Due to the exhaust pressure of now compressor 1
Power is very low, and the first valve port 111 opening very little of first pressure triple valve 11 is even in closed mode, first pressure triple valve 11
The second valve port 112 aperture it is larger.Now, the refrigerant that compressor 1 is discharged is partly into bypass circulation 2 with to refrigeration
System 100 is preheated；The 3rd valve port 113 and the second valve port 112 that another part refrigerant passes through first pressure triple valve 11
Flow into reservoir 4 in, and after through device for drying and filtering 5, throttling arrangement 6 and evaporator 7, finally flow back into compressor 1, this part system
Cryogen can also preheat to refrigeration system 100.
During refrigeration system 100 preheats, if the pressure of inspiration(Pi) of compressor 1 is too low, such as the air-breathing when compressor 1
When pressure is less than first predetermined value, evaporating pressure regulating valve 9 is opened and turns on compressor parallel pipeline 8, and the exhaust of compressor 1 is straight
Connect overcompression machine parallel pipeline 8 and flow back into compressor 1, so as to rapidly lift the pressure of inspiration(Pi) of compressor 1.Thus,
It can ensure that compressor 1 can stablize air-breathing, maintain the evaporating temperature and pressure of system.Make a reservation for when pressure of inspiration(Pi) is increased to first
Value or during higher than first predetermined value, evaporating pressure regulating valve 9 is closed and blocks compressor parallel pipeline 8.It should be noted that
Refrigeration system 100 work during the entire process of, evaporating pressure regulating valve 9 be constantly in it is spontaneous be turned on and off, without control.
When the preheating operation of refrigeration system 100 for a period of time after, when the pressure of inspiration(Pi) of compressor 1, to reach at or above second predetermined
During value, the first magnetic valve 10 is closed and blocks bypass circulation 2.Now, although the pressure at expulsion of compressor 1 has raised,
Or than relatively low.Now, the aperture very little of the first valve port 111 of first pressure triple valve 11, and first pressure triple valve 11
The aperture of second valve port 112 is larger, and the very little part in the refrigerant that compressor 1 is discharged flows through condenser 3 and flows into first pressure
First valve port 111 of triple valve 11, first end 201 of remaining most of cold-producing medium stream through bypass circulation 2 simultaneously flow into first pressure
3rd valve port 113 of triple valve 11.The refrigeration flowed into from the first valve port 111 of first pressure triple valve 11 and the 3rd valve port 113
Second valve port 112 of the agent through first pressure triple valve 11 flows out, and then refrigerant flows through reservoir 4, device for drying and filtering successively
5th, throttling arrangement 6 and evaporator 7, finally flow back into compressor 1.
It is understood that due to compressor 1 discharge refrigerant largely flow through bypass circulation 2 first end 201 and
The condensed device 3 of cold-producing medium stream of only fraction is condensed, and now the condensation efficiency of system is very low, the exhaust pressure of compressor 1
Power raises quickly.When the pressure at expulsion of compressor 1 reaches predetermined pressure, the refriger-ant section that compressor 1 is discharged enters condensation
Condensation heat release is carried out in device 3, now refrigeration system 100 is in the stable operation phase.In addition, now can be according to the ring of outside
The rotating speed of the cooling fan of refrigerant pressure regulation condenser 3 in border temperature and reservoir 4, so that compressor 1 is preferable
Operating mode under run.
During refrigeration system 100 is run, if outside environment temperature is too low, cooling fan speed governing is improper or last
End load the factor such as declines and causes the condensing pressure (pressure at expulsion) in system too low, and first pressure triple valve 11 can according to this
When operating mode and setting the first valve port 111 of pressure value adjustment first pressure triple valve 11 and the opening ratio of the 3rd valve port 113
Example, so that the condensed device 3 of less cold-producing medium stream, so as to which the condensing pressure in system is returned into normal value.It is so anti-
It is multiple, it can ensure that refrigeration system 100 works under -40 DEG C of low temperature environments.
In addition, in the running of refrigeration system 100, if occurring, the pressure of inspiration(Pi) of compressor 1 is reduced or system end is born
The lotus operating mode for causing pressure of inspiration(Pi) to reduce such as small, then the first magnetic valve 10 opened according to actual conditions, the pressure in compensation system.
Certainly, evaporating pressure regulating valve 9 can also be opened according to actual conditions so that the pressure of inspiration(Pi) of compressor 1 quickly raises.Making
In a period of cooling system 100 is run, the first magnetic valve 10 can realize complementary function with evaporating pressure regulating valve 9, so as to
Ensure that refrigeration system 100 can be stablized, reliably run.
Certainly, refrigeration system 100 can also further include oil eliminator (not shown) and gas-liquid separator (is schemed not
Show).Oil eliminator and gas-liquid separator are connected with compressor 1, and oil eliminator is connected to the He of exhaust outlet 101 of compressor 1
Between second end 802 of compressor parallel pipeline 8, gas-liquid separator be connected to compressor 1 air entry 102 and evaporator 7 it
Between.The structure and operation principle of oil eliminator and gas-liquid separator are well known to those skilled in the art, and are no longer retouched here
State.
Embodiment two,
As shown in Fig. 2 the refrigeration system 100 in the present embodiment is roughly the same with the structure of above-described embodiment one, difference
Place is only that the structure of control valve group.
Specifically, the control valve group in the present embodiment includes second solenoid valve 20, valve for pressure difference 21 and condensation pressure regulation
Valve 22.Second solenoid valve 20 is located on bypass circulation 2, and second solenoid valve 20 is configured to when the pressure of inspiration(Pi) of compressor 1 is less than
Bypass circulation 2 is turned on during third predetermined value and blocks bypass when the pressure of inspiration(Pi) of compressor 1 is greater than or equal to third predetermined value
Loop 2.
The first end 211 of valve for pressure difference 21 is connected between the first end 201 of bypass circulation 2 and second solenoid valve 20, pressure difference
Second end 212 of valve 21 is connected with reservoir import 401.Valve for pressure difference 21 is configured to when the pressure difference at its both ends is more than or equal to the
Its place pipeline is turned on during four predetermined values and pipeline where its is blocked when the pressure difference at its both ends is less than four predetermined values.Condensation pressure
Force regulating valve 22 is connected between the outlet of condenser 3 and reservoir import 401, and condensation pressure regulation valve 22 is configured to when pressure
The pressure at expulsion of the exhaust outlet 101 of contracting machine 1 turns on its place pipeline and works as the compressor 1 when being more than or equal to five predetermined values
The pressure at expulsion of exhaust outlet 101 block pipeline where its when being less than five predetermined values.
Refrigeration system is specifically described below according to the control method of the above-mentioned refrigeration system 100 of second aspect of the present invention embodiment
The course of work of system 100.
Specifically, when refrigeration system 100 is in low temperature environment for the first time (such as -40 DEG C low temperature environment), compression is opened
The preheating device of machine 1.After preheating device carries out the preheated one-section time to compressor 1, compressor 1 starts to start and operated.
Because the environment temperature of outside is relatively low, when refrigeration system 100 brings into operation for the first time, the pressure of inspiration(Pi) of system than relatively low, such as
When pressure of inspiration(Pi) is less than third predetermined value, second solenoid valve 20 turns on bypass circulation 2.Due to the exhaust pressure of now compressor 1
Power is very low, and valve for pressure difference 21 and condensation pressure regulation valve 22 are in closed mode.The refrigerant that compressor 1 is discharged mainly flows into side
Lead to loop 2, then cold-producing medium stream finally flows back into compressor 1, so as to be carried out in advance to the system of refrigeration system 100 through evaporator 7
Heat.
During refrigeration system 100 preheats, if the pressure of inspiration(Pi) of compressor 1 is too low, such as the air-breathing when compressor 1
When pressure is less than first predetermined value, evaporating pressure regulating valve 9 is opened and turns on compressor parallel pipeline 8, and the exhaust of compressor 1 is straight
Connect overcompression machine parallel pipeline 8 and flow back into compressor 1, so as to rapidly lift the pressure of inspiration(Pi) of compressor 1.Thus,
It can ensure that compressor 1 can stablize air-breathing, maintain the evaporating temperature and pressure of system.Make a reservation for when pressure of inspiration(Pi) is increased to first
Value or during higher than first predetermined value, evaporating pressure regulating valve 9 is closed and blocks compressor parallel pipeline 8.It should be noted that
During the whole service of refrigeration system 100, evaporating pressure regulating valve 9 be constantly in it is spontaneous be turned on and off, without control.
When the preheating operation of refrigeration system 100 for a period of time after, when the pressure of inspiration(Pi) of compressor 1, to reach at or above the 3rd predetermined
During value, second solenoid valve 20 is closed and blocks bypass circulation 2.Now, although the pressure at expulsion of compressor 1 has raised,
Or than relatively low, it is not enough to open condensation pressure regulation valve 22.Pressure at expulsion due to compressor 1 is gradually increasing, valve for pressure difference
21 both ends establish pressure difference quickly, and when the pressure difference at the both ends of valve for pressure difference 21 reaches four predetermined values, valve for pressure difference 21 is opened simultaneously
Pipeline where turning on it.Now, where first end 201 and valve for pressure difference 21 of the cold-producing medium stream that compressor 1 is discharged through bypass circulation 2
Pipeline simultaneously flows into reservoir 4, and then refrigerant passes sequentially through throttling arrangement 6, evaporator 7 flows back into compressor 1.Due to this time
The both ends of stream device 6 establish pressure difference, so as to carry out refrigeration work.
It is understood that due to compressor 1 discharge refrigerant substantially flow through bypass circulation 2 first end 201 and
Pipeline where valve for pressure difference 21, now the condensation efficiency of system is very low, and the pressure at expulsion of compressor 1 raises quickly.When compressor 1
Pressure at expulsion when reaching five predetermined values, condensation pressure regulation valve 22 is opened, and the refriger-ant section that compressor 1 is discharged enters cold
Condensation heat release is carried out in condenser 3.And after valve for pressure difference 21 turns on, the pressure difference at the both ends of valve for pressure difference 21 can be gradually reduced, until closing.
Now, refrigeration system 100 is in the stable operation phase.In addition, now can be according to the environment temperature and reservoir 4 of outside
The rotating speed of the cooling fan of interior refrigerant pressure regulation condenser 3, so that compressor 1 is run under preferable operating mode.
During refrigeration system 100 is run, if outside environment temperature is too low, cooling fan speed governing is improper or last
End load the factor such as declines and causes the condensing pressure (pressure at expulsion) in system too low, such as condensing pressure (pressure at expulsion) is low
When five predetermined values, condensation pressure regulation valve 22 is closed, the first end 211 and compression of the exhaust of compressor 1 in valve for pressure difference 21
Felt suffocated between the exhaust outlet 101 of machine 1, because the refrigerant that compressor 1 is discharged crosses condenser 3, in the pressure at expulsion of compressor 1
Rise ground quickly.When there is pressure difference at the both ends of valve for pressure difference 21, such as when the pressure difference at the both ends of valve for pressure difference 21 reaches four predetermined values, pressure difference
Valve 21 is opened, and its both ends pressure difference is gradually reduced after valve for pressure difference 21 turns on, until closing, now in the pressure at expulsion of compressor 1
Rise, until opening condensation pressure regulation valve 22, the refrigerant that compressor 1 is discharged flows through from condenser 3 again.As condensing pressure (row
Atmospheric pressure) drop to again condensation pressure regulation valve 22 close when, valve for pressure difference 21 can be opened again, so repeatedly, can ensure
Refrigeration system 100 is stable under -40 DEG C of low temperature environments, reliably runs.
In addition, in the running of refrigeration system 100, if occurring, the pressure of inspiration(Pi) of compressor 1 is reduced or system end is born
The lotus operating mode for causing pressure of inspiration(Pi) to reduce such as small, then second solenoid valve 20 can be opened with actual conditions, the pressure of compensation system.When
So, evaporating pressure regulating valve 9 can also be opened according to actual conditions so that the pressure of inspiration(Pi) of compressor 1 quickly raises.Freezing
In a period of system 100 is run, second solenoid valve 20 can realize complementary function with evaporating pressure regulating valve 9, so as to true
Insurance system can, reliably be run.
Embodiment three,
As shown in figure 3, the refrigeration system 100 in the present embodiment is roughly the same with the structure in above-described embodiment one, it is different
Part is only that the structure of control valve group.
Control valve group in the present embodiment includes the 3rd magnetic valve 30 and second pressure triple valve 31.3rd magnetic valve 30 is set
On bypass circulation 2, the 3rd magnetic valve 30 is configured to turn on bypass when the pressure of inspiration(Pi) of compressor 1 is less than six predetermined values
Loop 2 and block bypass circulation 2 when the pressure of inspiration(Pi) of compressor 1 is greater than or equal to six predetermined values.Second pressure triple valve
31 the first valve port 311 is connected with the exhaust outlet 101 of compressor 1, and the second valve port 312 of second pressure triple valve 31 is with bypassing back
The first end 201 on road 2 and reservoir import 401 are connected, the 3rd valve port 313 and the condenser 3 of second pressure triple valve 31
Import 301 is connected.
It should be noted that the 3rd magnetic valve 30 and second pressure triple valve 31 in the present embodiment respectively with embodiment one
In the first magnetic valve 10 it is identical with the operation principle of first pressure triple valve 11.Wherein, the first magnetic valve 10 and the 3rd electromagnetism
The position of valve 30 in systems is also identical, and different is only the setting of second pressure triple valve 31 and first pressure triple valve 11
Particular location, but the course of work of whole refrigeration system 100 is not influenceed.In other words, the control valve group and refrigeration in the present embodiment
The course of work of system 100 and above-described embodiment one are basically identical.Therefore, the control process of the control valve group in the present embodiment and
The course of work of refrigeration system 100 may be referred to above-described embodiment one and obtain, and no longer be described in detail here.
Further, check valve 32, check valve 32 are also in series between the outlet 302 and reservoir import 401 of condenser 3
It is configured to from the outlet 302 of condenser 3 to the direction one-way conduction of reservoir import 401.In the refrigerant that compressor 1 is discharged
When flowing through condenser 3, check valve 32 is opened；When the refrigerant that compressor 1 is discharged crosses condenser 3 and when flowing into bypass circulation 2,
Check valve 32 is closed, and now check valve 32 can prevent the refrigerant in pipeline to be back to condenser from the outlet 302 of condenser 3
In 3.
To sum up, refrigeration system 100 according to embodiments of the present invention, by the control of control valve group, refrigeration system can be made
100 start in the environment of low temperature, and pass through control valve group and the adjustment effect of evaporating pressure regulating valve 9 so that refrigeration system
100 can adjust the exhaust flow path of compressor 1 during operation according to actual operating mode, so as to so that refrigeration system
100 stabilizations, reliably run.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (6)
- A kind of 1. refrigeration system, it is characterised in that including：Join end to end successively to form the compressor in loop, condenser, throttling arrangement and evaporator；Bypass circulation, the first end of the bypass circulation are connected between the exhaust outlet of the compressor and the condenser and Two ends are connected between the throttling arrangement and the evaporator；Reservoir, the reservoir have reservoir import and reservoir outlet, the reservoir import and the condenser Outlet is connected, and the reservoir outlet is connected with the entrance of the throttling arrangement；Control valve group, the control valve group are used to control the exhaust of the compressor to selectively flow through the bypass circulation and institute One in condenser is stated, the control valve group includes the first magnetic valve and first pressure triple valve, and first magnetic valve is set On the bypass circulation, first magnetic valve is configured to when the pressure of inspiration(Pi) of the compressor is less than second predetermined value Turn on the bypass circulation and block the side when the pressure of inspiration(Pi) of the compressor is greater than or equal to the second predetermined value Logical loop, the first valve port of the first pressure triple valve are connected with the outlet of the condenser, the first pressure triple valve The second valve port be connected with the reservoir import, the 3rd valve port of the first pressure triple valve is connected to the bypass circulation First end and first magnetic valve between,Or the control valve group includes second solenoid valve, valve for pressure difference and condensation pressure regulation valve, the second solenoid valve is located at On the bypass circulation, the second solenoid valve is configured to lead when the pressure of inspiration(Pi) of the compressor is less than third predetermined value Lead to the bypass circulation and block the bypass when the pressure of inspiration(Pi) of the compressor is greater than or equal to the third predetermined value Loop, the first end of the valve for pressure difference are connected between the first end of the bypass circulation and the second solenoid valve, the pressure Second end of difference limen is connected with the reservoir import, and the valve for pressure difference is configured to when the pressure difference at its both ends is more than or equal to the Its place pipeline is turned on during four predetermined values and pipeline where its, institute are blocked when the pressure difference at its both ends is less than four predetermined value State condensation pressure regulation valve to be connected between the outlet of the condenser and the reservoir import, the condensation pressure regulation valve Pipeline where being configured to turn on it when the pressure at expulsion of the exhaust outlet of the compressor is more than or equal to five predetermined values and Pipeline where it is blocked when the pressure at expulsion of the exhaust outlet of the compressor is less than five predetermined value,Or the control valve group includes the 3rd magnetic valve and second pressure triple valve, the 3rd magnetic valve is located at the side On logical loop, the 3rd magnetic valve is configured to when the pressure of inspiration(Pi) of the compressor is less than six predetermined values described in conducting Bypass circulation and the bypass circulation is blocked when the pressure of inspiration(Pi) of the compressor is greater than or equal to six predetermined value, institute The first valve port for stating second pressure triple valve is connected with the exhaust outlet of the compressor, the second valve of the second pressure triple valve Mouthful be connected with the first end of the bypass circulation and the reservoir import, the 3rd valve port of the second pressure triple valve and The import of the condenser is connected.
- 2. refrigeration system according to claim 1, it is characterised in that also include：Compressor parallel pipeline, the first end of the compressor parallel pipeline are connected to the air entry of the compressor and the steaming Between hair device and the second end is connected between the exhaust outlet of the compressor and the first end of the bypass circulation；Evaporating pressure regulating valve, the evaporating pressure regulating valve are located on the compressor parallel pipeline, and the evaporating pressure is adjusted Section valve is configured to turn on the compressor parallel pipeline when the pressure of inspiration(Pi) of the compressor is less than first predetermined value and worked as The pressure of inspiration(Pi) of the compressor blocks the compressor parallel pipeline when being greater than or equal to the first predetermined value.
- 3. refrigeration system according to claim 1, it is characterised in that also including device for drying and filtering, the device for drying and filtering It is connected between the entrance of the reservoir outlet and the throttling arrangement.
- 4. refrigeration system according to claim 1, it is characterised in that include the 3rd magnetic valve in the control valve group During with the second pressure triple valve, check valve is also in series between the outlet of the condenser and the reservoir import, institute Check valve is stated to be configured to from the outlet of the condenser to the reservoir import direction one-way conduction.
- 5. the control method of a kind of refrigeration system according to any one of claim 1-4, it is characterised in that including as follows Step：S10, start the compressor；S20, detection environment temperature, when environment temperature is less than predetermined temperature, the compressor is controlled by the control valve group Exhaust enter the bypass circulation；S20, the detection compressor pressure at expulsion, when the pressure at expulsion of the compressor is more than or equal to scheduled pressure value When, the exhaust for controlling the compressor by the control valve group is entered in the condenser.
- 6. control method according to claim 5, it is characterised in that before the step S10, open the compressor Preheating device to be preheated to the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510993639.9A CN105444448B (en) | 2015-12-23 | 2015-12-23 | refrigeration system and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510993639.9A CN105444448B (en) | 2015-12-23 | 2015-12-23 | refrigeration system and its control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105444448A CN105444448A (en) | 2016-03-30 |
| CN105444448B true CN105444448B (en) | 2018-02-06 |
Family
ID=55554936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510993639.9A Active CN105444448B (en) | 2015-12-23 | 2015-12-23 | refrigeration system and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105444448B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659238A (en) * | 2022-03-11 | 2022-06-24 | 深圳市英威腾网能技术有限公司 | Air conditioning system and low-temperature starting control method thereof |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106091164A (en) * | 2016-06-27 | 2016-11-09 | 广东美的制冷设备有限公司 | A kind of compressor preheating structure, pre-heating system, pre-heating mean and air-conditioning |
| CN106482378A (en) * | 2016-10-19 | 2017-03-08 | 广东美的制冷设备有限公司 | Air conditioning system and its control method |
| CN106440434B (en) * | 2016-10-19 | 2022-11-08 | 广东美的制冷设备有限公司 | Air conditioning system and control method thereof |
| CN106403413A (en) * | 2016-11-25 | 2017-02-15 | 广州华凌制冷设备有限公司 | Air conditioning system and control method |
| CN107576109B (en) * | 2017-08-23 | 2018-11-13 | 珠海格力电器股份有限公司 | The control method and heat pump system of heat pump system |
| CN108168168B (en) * | 2017-12-29 | 2021-07-23 | 海尔智家股份有限公司 | Refrigerator with a door |
| JP6984015B2 (en) * | 2018-06-13 | 2021-12-17 | 三菱電機株式会社 | Refrigeration cycle device |
| CN108917083A (en) * | 2018-06-21 | 2018-11-30 | 青岛海尔空调电子有限公司 | A kind of control method of air conditioner, device, storage medium |
| US11624531B2 (en) | 2018-06-22 | 2023-04-11 | Carrier Corporation | Oil control system and method for HVAC system |
| KR20200097127A (en) * | 2019-02-07 | 2020-08-18 | 삼성전자주식회사 | Air conditioner system comprising refrigerant cycle circuitry for oil flow blocking |
| CN109737634A (en) * | 2019-02-22 | 2019-05-10 | 广东海悟科技有限公司 | A kind of non-stop-machine heat pump air conditioning system of low temperature and its control method |
| CN112728821B (en) * | 2019-10-14 | 2022-07-08 | 广东芬尼克兹节能设备有限公司 | Compressor ultralow-temperature safe operation control method, device, equipment and storage medium |
| CN112344602A (en) * | 2020-09-22 | 2021-02-09 | 广东海悟科技有限公司 | Air conditioning system for improving low-temperature operation reliability and control method thereof |
| CN112502959B (en) * | 2020-12-04 | 2022-06-10 | 青岛万宝压缩机有限公司 | Compressor testing device and method |
| CN112547152A (en) * | 2020-12-09 | 2021-03-26 | 四方科技集团股份有限公司 | Refrigerating system of movable test device and movable test device |
| CN113639415B (en) * | 2021-07-23 | 2023-05-26 | 青岛海尔空调电子有限公司 | Method and device for defrosting air conditioner and air conditioner |
| CN115077134A (en) * | 2022-06-08 | 2022-09-20 | 珠海凌达压缩机有限公司 | Compressor system, air conditioner and control method of compressor system |
| CN115200268A (en) * | 2022-06-10 | 2022-10-18 | 智己汽车科技有限公司 | Heat exchange circulation system, air conditioner and vehicle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101070996A (en) * | 2006-05-12 | 2007-11-14 | 上海久源新能源科技有限公司 | Heat pump water heater with low temeprature environment fast start device |
| CN102105759A (en) * | 2008-07-23 | 2011-06-22 | 开利公司 | Methods and systems for compressor operation |
| CN102128524A (en) * | 2010-01-13 | 2011-07-20 | 珠海格力电器股份有限公司 | Heat pump with preheating function and preheating method thereof |
| EP2503264A2 (en) * | 2011-03-24 | 2012-09-26 | Airbus Operations GmbH | Cooling system and method for operating a cooling system |
| CN104034075A (en) * | 2013-03-07 | 2014-09-10 | 广东美的暖通设备有限公司 | Air-conditioning system |
| CN204730502U (en) * | 2015-06-01 | 2015-10-28 | 海信（山东）空调有限公司 | A kind of cryogenic refrigeration machine room air-conditioner |
| CN205448381U (en) * | 2015-12-23 | 2016-08-10 | 广东美的暖通设备有限公司 | Cooling systems |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090228152A1 (en) * | 2008-03-04 | 2009-09-10 | Siemens Building Technologies, Inc. | Chiller Adaptation for Cold Weather Use |
-
2015
- 2015-12-23 CN CN201510993639.9A patent/CN105444448B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101070996A (en) * | 2006-05-12 | 2007-11-14 | 上海久源新能源科技有限公司 | Heat pump water heater with low temeprature environment fast start device |
| CN102105759A (en) * | 2008-07-23 | 2011-06-22 | 开利公司 | Methods and systems for compressor operation |
| CN102128524A (en) * | 2010-01-13 | 2011-07-20 | 珠海格力电器股份有限公司 | Heat pump with preheating function and preheating method thereof |
| EP2503264A2 (en) * | 2011-03-24 | 2012-09-26 | Airbus Operations GmbH | Cooling system and method for operating a cooling system |
| CN104034075A (en) * | 2013-03-07 | 2014-09-10 | 广东美的暖通设备有限公司 | Air-conditioning system |
| CN204730502U (en) * | 2015-06-01 | 2015-10-28 | 海信（山东）空调有限公司 | A kind of cryogenic refrigeration machine room air-conditioner |
| CN205448381U (en) * | 2015-12-23 | 2016-08-10 | 广东美的暖通设备有限公司 | Cooling systems |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659238A (en) * | 2022-03-11 | 2022-06-24 | 深圳市英威腾网能技术有限公司 | Air conditioning system and low-temperature starting control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105444448A (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105444448B (en) | refrigeration system and its control method | |
| CN205448381U (en) | Cooling systems | |
| US9612042B2 (en) | Method of operating a refrigeration system in a null cycle | |
| US6941770B1 (en) | Hybrid reheat system with performance enhancement | |
| JP4518998B2 (en) | Heat pump air conditioner | |
| EP2568232B1 (en) | Air conditioner | |
| JP2004161267A (en) | Combination of cooling plant with heat pump for automobile for performing cooling, heating and dehumidification in cabin | |
| CN106595105B (en) | Air regulator | |
| CN110207414B (en) | Self-cascade refrigeration system, drying device with same and operation method | |
| EP3425306B1 (en) | Freezing device | |
| US10955149B2 (en) | Dehumidification system for heat pump | |
| EP2554411A1 (en) | Refrigerating system for a vehicle and method of controlling a refrigerating system for a vehicle | |
| CN108692478A (en) | The control method of air-conditioning system and air-conditioning system | |
| CN107747806A (en) | Air-conditioning system | |
| CN107940876A (en) | The control method of air conditioner and air conditioner | |
| KR102207263B1 (en) | An air conditioner and a control method the same | |
| CN207471736U (en) | Air-conditioning system | |
| CN114659238B (en) | Air conditioning system and low-temperature starting control method thereof | |
| CN107676902A (en) | Air-conditioning system | |
| US20220252317A1 (en) | A heat pump | |
| JP6103181B2 (en) | Engine-driven air conditioner | |
| CN113383201B (en) | Refrigeration cycle device | |
| JP6144513B2 (en) | Air conditioner | |
| KR100748982B1 (en) | Air conditioner and Control method of the same | |
| JPS6032535Y2 (en) | Heat recovery air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |