CN109341121A - A kind of refrigeration system and control method - Google Patents
A kind of refrigeration system and control method Download PDFInfo
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- CN109341121A CN109341121A CN201811366700.7A CN201811366700A CN109341121A CN 109341121 A CN109341121 A CN 109341121A CN 201811366700 A CN201811366700 A CN 201811366700A CN 109341121 A CN109341121 A CN 109341121A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
- 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
- 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
- F25B49/027—Condenser 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
- F25B2400/01—Heaters
-
- 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
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator
- F25B2700/21173—Temperatures of an evaporator of the fluid cooled by the evaporator at the outlet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
It includes: compressor, condenser, electric expansion valve and evaporator that the present invention, which provides a kind of refrigeration system and control method, the refrigeration system,；Cooling medium pipeline, wherein being connected with cooled medium, and cooling medium pipeline is passed through in evaporator, refrigerant and cooled medium is made to exchange heat in evaporator；Thermostat is arranged on cooling medium pipeline, and the air side of the condensation fan is arranged in, so that the hot wind of condensation fan blowout and by exchanging heat between the cooled medium in the cooling medium pipeline in the thermostat in the thermostat.Heat temperature raising can be carried out to the cooled medium in cooling medium pipeline in thermostat by the hot wind that condensation fan is blown out through the invention, make full use of condensation waste heat for heated cooling medium to target temperature range, improve the stability of refrigeration system, without the electric heating of safety difference, system performance and reliability, safety are improved while reducing design difficulty.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to a kind of refrigeration system and control method.
Background technique
In refrigerating and air conditioning industry, hot-gas bypass technology is many times used to defrosting or adjusting evaporating temperature；In digital whirlpool
It revolves on compressor, hot-gas bypass primarily serves load unloading effect, to reduce ability output.The steam compression type heat of the overwhelming majority
Pump/refrigeration unit does not all need the Balance Treatment that high-low pressure is specially carried out when shutting down, and mainly unit itself can pass through one
The shutdown of section time places and reaches high-low pressure balance, usually can reach high-low pressure equilibrium state in a few minutes, weight of compressor
New starting with pressure will not start.
In the water cooler or oil cooling machine group of some accurate demand for control temperature, hot-gas bypass is directly part high temperature
High-pressure refrigerant is passed through after throttling the i.e. input end of evaporator, mixes with the low-temperature low-pressure refrigerant liquid after original throttling, from
And the pressure and temperature of evaporator inlet is improved, further influence the outlet temperature of cooled liquid.This way would generally
The fluctuation of refrigeration system is caused, overlong time is stablized, the outlet temperature (namely control target) for the liquid that is correspondingly cooled
It will appear influence of fluctuations, or even sometimes might as well original control stability.
In order to solve this interactional fluctuation, some accurate units are using auxiliary electrical heater technology cooled liquid
Temperature promoted to target temperature range, accurate heating efficiency is implemented to auxiliary electrical heater by silicon-controlled equal design and is exported,
This method can fast implement target temperature and not interfere with the stability of refrigeration system.But the disadvantage is that needing to expend volume
Outer electric energy, electrically heated safety are poor, silicon-controlled more complicated to the hardware design and software control of controller.It is aobvious
So, refrigeration system control stability and electrically heated safety, integrity problem are solved, is that the emphasis of accurate refrigeration unit is asked
Topic.
There is fluctuation since refrigeration system in the prior art is adjusted there are the temperature of cooled medium, it is unstable, even
Cause the fluctuation of refrigeration system, stablizes overlong time, the outlet temperature (namely control target) for the liquid that is correspondingly cooled
It will appear influence of fluctuations, cooled medium can not be fast implemented and reach target temperature and do not interfere with the stabilization of refrigeration system
Property, needs to expend that additional electric energy, electrically heated safety be poor, silicon-controlled hardware design and software control to controller
The technical problems such as more complicated, therefore researching and designing of the present invention goes out a kind of refrigeration system and control method.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming refrigeration system presence in the prior art can not be real simultaneously
Existing cooled medium fast and stable reaches target temperature and does not interfere with the stability of refrigeration system, and does not need consuming volume
The defect of outer electric energy, to provide a kind of refrigeration system and control method.
The present invention provides a kind of refrigeration system comprising:
Compressor, condenser, condensation fan, electric expansion valve and evaporator；
Cooling medium pipeline, wherein being connected with cooled medium, and the cooling medium pipeline is passed through in the evaporator, makes
It obtains refrigerant and cooled medium exchanges heat in the evaporator；
Thermostat is arranged on the cooling medium pipeline, and the outlet air of the condensation fan is arranged in the thermostat
Side, so that the hot wind of condensation fan blowout and by the cooled medium in the cooling medium pipeline in the thermostat
Between exchange heat.
Preferably,
The thermostat is arranged on the cooling medium pipeline and is located at along cooled medium flow direction, the evaporation
The tract of device.
Preferably,
The thermostat includes air duct and the air-valve that is arranged at the tunnel inlet, and the air-valve can control the wind
Road opens and closes and adjusts opening size.
Preferably,
Input end on the cooling medium pipeline positioned at the thermostat is provided with the first temperature sensor.
Preferably,
Outlet end on the cooling medium pipeline positioned at the thermostat is provided with second temperature sensor.
Preferably,
When including the first temperature sensor, first temperature sensor is temperature sensing package；It is sensed when including second temperature
When device, the second temperature sensor is temperature sensing package.
Preferably,
The thermostat is finned heat exchanger, and the finned heat exchanger includes the heat-dissipating pipe of outer wall belt annular fin
Or the heat-dissipating pipe of outer wall belt longitudinal fin, and the heat-dissipating pipe of the outer wall belt annular fin be arranged as tube axis direction with it is described cold
The air-out direction of solidifying blower is perpendicular, and the heat-dissipating pipe of the outer wall belt longitudinal fin is arranged as tube axis direction and the condensating wind
The air-out direction of machine is parallel.
Preferably,
The cooled medium be water, water be passed through the cooling medium pipeline first pass through in the evaporator be cooled, so
Afterwards again into the excessively described thermostat can be heated.
The present invention also provides a kind of control methods of refrigeration system, refrigeration system above-mentioned are used, to cooled medium
Temperature realize accurate control.
Preferably,
When including the first temperature sensor and second temperature sensor, institute is detected by first temperature sensor
The cooling medium inlet temperature for stating thermostat is Tb, detects that the cooling of the thermostat is situated between by the second temperature sensor
Matter outlet temperature is Ta；The target temperature of cooled medium is set as Ts；
When the refrigeration system starts, adjusts compressor frequency and/or electronic expansion valve opening and/or condensation fan turns
Speed, so that the temperature of Tb reaches Tb≤Ts+ △ t, the △ t is the first trueness error.
Preferably,
As Ts- △ t- △ t1≤Tb≤Ts+ △ t, the compressor, the electric expansion valve and the condensating wind are maintained
The current operating conditions of machine, wherein the △ t1 is the second trueness error.
Preferably,
As Tb < Ts- △ t- △ t1, and when including air-valve, then the air-valve is opened, to pass through the thermostat pair
The cooled medium carries out heat temperature raising, until meeting Ts- △ t- △ t1≤Tb≤Ts+ △ t again.
Preferably,
Judge whether the cooling medium outlet temperature Ta meets-△ t≤Ts-Ta≤△ t, such as meets, then maintain existing
Valve area；
As Ts-Ta > △ t, then valve area is increased, and the aperture of the bigger air-valve of difference of Ts-Ta is bigger, until
Ta reaches-△ t≤Ts-Ta≤△ t, maintains valve area at this time；
As Ts-Ta <-△ t, then close the air-valve, and adjust the compressor frequency increase, the electronics it is swollen
At least one of the aperture of swollen valve increases and the revolving speed of the condensation fan increases, and increases refrigerating capacity.
A kind of refrigeration system and control method provided by the invention have the following beneficial effects:
1. the present invention is arranged on the cooling medium pipeline by setting thermostat, thermostat；Thermostat is arranged in institute
State the air side of condensation fan, so that the hot wind of condensation fan blowout and the cooling medium pipe passed through in the thermostat
It exchanges heat between cooled medium in road；Can by condensation fan blow out hot wind in thermostat to cooling medium pipe
Cooled medium in road carries out heat temperature raising, makes full use of condensation waste heat for heated cooling medium to target temperature range,
It is more accurately adjusted without the load to refrigeration system, so that the fluctuation range of the refrigerant temperature of evaporator outlet can
Suitably to amplify, the obvious fluctuation of evaporator inner refrigerant state not will cause, to improve the stability of refrigeration system, nothing
The electric heating of safety difference is needed, improves system performance and reliability, safety while reducing design difficulty.
2. the present invention, can be according to the freezing in evaporator by the setting of the first and second temperature sensors and air-valve
The departure of medium outlet temperature and target temperature adjusts the aperture of air-valve, so that produce by boasting from air cooling fin pipework condensation device
Low temperature chilled water is heated by thermostat, by heat-dissipating pipe in hot wind part, until leaving water temperature reaches control target.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment 1 of refrigeration system of the invention；
Fig. 2 is the structural schematic diagram of the embodiment 2 of refrigeration system of the invention.
Appended drawing reference indicates in figure are as follows:
1, compressor；2, condenser；21, condensation fan；3, electric expansion valve；4, evaporator；5, cooling medium pipeline；6,
Thermostat；61, air duct；62, heat-dissipating pipe；8, air-valve；91, the first temperature sensor；92, second temperature sensor.
Specific embodiment
As shown in Figs. 1-2, the present invention provides a kind of refrigeration system comprising:
Compressor 1, condenser 2, condensation fan 21, electric expansion valve 3 and evaporator 4；
Cooling medium pipeline 5, wherein being connected with cooled medium, and the cooling medium pipeline 5 is passed through the evaporator 4
In, refrigerant and cooled medium are exchanged heat in the evaporator 4；
Thermostat 6 is arranged on the cooling medium pipeline 5, and the condensation fan 21 is arranged in the thermostat 6
Air side, so that hot wind that the condensation fan 21 is blown out and by the quilt in the cooling medium pipeline 5 in the thermostat 6
It is exchanged heat between cooling medium and (heat temperature raising is carried out to cooled medium).(thermostat of the invention substantially play be
The effect of heat exchanger, so that refrigerant and cooled medium carry out heat exchange wherein, thermostat here is not limited to specifically
Structure, that is, so that the segment section that refrigeration bypass branch and cooling medium pipeline exchange heat can be referred to as thermostat).
The present invention is arranged on the cooling medium pipeline by setting thermostat, thermostat；Thermostat is arranged described
The air side of condensation fan, so that the hot wind of condensation fan blowout and by the cooling medium pipeline in the thermostat
In cooled medium between exchange heat；Can by condensation fan blow out hot wind in thermostat to cooling medium pipeline
In cooled medium carry out heat temperature raising, make full use of condensation waste heat for heated cooling medium to target temperature range, nothing
Need to the load to refrigeration system more accurately adjusted so that evaporator outlet refrigerant (i.e. cooled medium, under
The fluctuation range of temperature can suitably amplify together), not will cause the obvious fluctuation of evaporator inner refrigerant state, to improve
The stability of refrigeration system improves system performance and reliable without the electric heating of safety difference while reducing design difficulty
Property, safety.
Preferably,
The thermostat 6 is arranged on the cooling medium pipeline 5 and is located at along cooled medium flow direction, the steaming
Send out the tract of device 4.This is the position that is preferably provided with of thermostat of the invention, that is, the tract for being positioned in evaporator can
So that cooled medium be introduced into evaporator be cooled cooling after, again by the thermostat to cooled medium carry out heating liter
Temperature, and then the temperature of cooled medium is accurately controlled or finely tuned, to realize to the accurate of the temperature of cooled medium
With stable control.The former carries out significantly cooling and handles, and the latter carries out slight heating and adjusts processing to target temperature.
Conventional warm-down processing method is by adjusting electric expansion valve directly to adjust the side of the coolant quantity entered in evaporator
Method, the stabilized speed of system is very slow when reaching target temperature range.The present invention can quickly reach target temperature on this basis
Degree, but by carrying out heating treatment speed faster to the chilled water of supercooling, and can be realized fast and stable control, substitute electric add
The energy saving of the heating treatment of heat avoids the too low influence lathe of chilled water temperature, passes through the various of refrigeration unit in conventional method
Reach new stabilization process after undulated control again and need the long time, new stablizing is reached when chilled water temperature is excessively high and is controlled
System is also a prolonged stable control process, this is the shortcoming of conventional temperature control technique.
Preferably,
The thermostat 6 includes air duct 61 and the air-valve 8 that 61 inlet of air duct is arranged in, and the air-valve 8 can be controlled
It makes the air duct 61 and opens and closes and adjust opening size.The heat that condensation fan is blown can be received by the way that air duct is arranged
Wind, and air-valve is arranged at tunnel inlet can be to the wind of air duct import progress control action, to control quilt according to actual needs
Whether cooling medium is heated by thermostat, realizes intelligent control, smaller to the stability influence of refrigeration system.
Preferably,
Input end on the cooling medium pipeline 5 positioned at the thermostat 6 is provided with the first temperature sensor 91；?
Outlet end on the cooling medium pipeline 5 positioned at the thermostat 6 is provided with second temperature sensor 92.By in thermostat
The input end temperature that the first temperature sensor is set cooled medium can be entered before thermostat realize detection effect, lead to
The temperature crossed after the outlet end of thermostat setting second temperature sensor can enter thermostat to cooled medium is realized
Detection effect；It is compared by the refrigerant temperature (low temperature chilled water) of evaporator outlet with temperature control target, according to deviation
Heating amount required for amount calculates, and then air-valve is accurately controlled, so that the refrigerant in thermostat is accurately heated to target
Temperature realizes the temperature control target of fast and stable；It is Exchange of apparent heat in thermostat, graded temperature-control is conducive to system and stablizes.
The present invention can be situated between by the setting of the first and second temperature sensors and air-valve according to the freezing in evaporator
The departure of matter outlet temperature and target temperature can be evaluated whether required hot-gas bypass refrigeration dose, to be precisely controlled bypass
Refrigerant hot gas, realize the accurate and fast and stable of refrigeration system；According to temperature sensing package A (outlet temperature) and set temperature it
Difference determines the heat exchange size in the aperture regulation control " thermostat " of air-valve, so as to accurately to low temperature chilled water
Carry out heating adjustment.
Preferably,
When including the first temperature sensor 91, first temperature sensor 91 is temperature sensing package；When including second temperature
When sensor 92, the second temperature sensor 92 is temperature sensing package.This is the excellent of the first and second temperature sensors of the invention
Select structure type.
Preferably,
The thermostat 6 is finned heat exchanger, and the finned heat exchanger includes the heat dissipation of outer wall belt annular fin
The heat-dissipating pipe 62 (embodiment 2, as shown in Figure 2) of pipe 62 (embodiment 1, as shown in Figure 1) or outer wall belt longitudinal fin, and it is described outer
The air-out direction that the heat-dissipating pipe 62 of cornice annular fin is arranged as tube axis direction and the condensation fan is perpendicular, the outer wall
It is parallel with the air-out direction of the condensation fan that heat-dissipating pipe 62 with longitudinal fin is arranged as tube axis direction.This is the present invention
Thermostat two different preferred constructive forms, by the heat-dissipating pipe of outer wall belt annular fin and by its axis and outlet air
Direction is arranged vertically, and hot wind is enabled to exchange heat between fin in maximum efficiency, is improved heat exchange efficiency, is passed through outer wall belt
Its axis and air-out direction are simultaneously arranged in parallel by the heat-dissipating pipe of longitudinal fin, enable to hot wind in maximum efficiency with fin it
Between exchange heat, improve heat exchange efficiency.
The present invention: 1. make low temperature chilled water enter the heat-dissipating pipes of thermostat, by flowed through outside heat-dissipating pipe and air quantity by
The Hot-blast Heating low temperature chilled water of control；Hot blast rate is adjusted by the opening size of controllable air-valve, and the aperture of air-valve is according to low
Control is adjusted in the relationship of warm chilled water and target temperature；In thermostat annular fin heat-dissipating pipe can be plunderred using hot wind is horizontal
(i.e. heat pipe axis is vertical with air-out direction) can also plunder longitudinal fin heat-dissipating pipe (i.e. heat pipe axis and outlet air using hot wind is vertical
Direction is parallel), the hot wind for making full use of fin tube condenser to distribute.
2. the refrigerant temperature (low temperature chilled water) by evaporator outlet is compared with temperature control target, according to deviation
Heating amount required for amount calculates, and then accurately control valve area and adjust air quantity of the hot wind by thermostat, so that thermostat
Interior refrigerant is accurately heated to target temperature, realizes the temperature control target of fast and stable；It is Exchange of apparent heat in thermostat, divides
Grade temperature control is not related to refrigeration system adjusting, is conducive to the stability of raising system temperature control.
Preferably,
The cooled medium be water, water be passed through the cooling medium pipeline 5 first pass through in the evaporator 4 be cooled,
Then again into the excessively described thermostat 6 can be heated.This is the preferred kind of cooled medium of the invention, can be passed through
Water is controlled reach accurate temperature after precision component is cooled down, improve cooling effect.
As depicted in figs. 1 and 2, compressor, condenser (this programme is diagram with air cooling fin pipework condensation device), restricting element
(this programme is by taking electric expansion valve as an example) and evaporator are sequentially connected with, and refrigerant flow direction is identical as this sequence direction and is formed basic
Refrigeration cycle.
A thermostat is disposed on fin tube condenser air-out direction, the air inlet of thermostat is controlled by air-valve, is utilized
Part hot wind is blown into thermostat, is passed through the flow of thermostat using valve area size control hot wind by the overbottom pressure of condensation fan,
To control the Exchange of apparent heat amount in thermostat.
Thermostat includes the controllable air-valve and heat-dissipating pipe of air hose (i.e. air duct 61), air hose inlet.Heat-dissipating pipe can be with
It is that outer wall belt annular fin is also possible to outer wall belt longitudinal fin, finned tube exchanger or micro-channel heat exchanger can also be used
Replace above two heat-dissipating pipe.Preferably, hot wind is horizontal plunders that annular finned radiator (as shown in Figure 1), hot wind are vertical to plunder longitudinal fin
Radiator (as shown in Figure 2).
Water system water inlet first passes through evaporator, cools into come out from evaporator after water at low temperature and enters back into thermostat, steams
It is disposed with temperature sensing package B (i.e. the first temperature sensor 91) on the water pipe that hair device is connect with thermostat, for detecting water at low temperature (low temperature
Chilled water) temperature；Low temperature chilled water, which enters after thermostat, to be accurately heated to after controlled object temperature by external hot wind from temperature control
Device outflow exports and is disposed with temperature sensing package A (i.e. second temperature sensor 92) on water pipe, for detecting leaving water temperature.
Temperature sensing package A and temperature sensing package B, position should not be blown influence by hot wind, avoid detection inaccuracy.
Preferably, there is temperature sensing package C on high-temperature inlet water pipe, for detecting the temperature (not shown) of high-temperature inlet water.
The present invention also provides a kind of control methods of refrigeration system, preceding described in any item refrigeration systems are used, to quilt
The temperature of cooling medium realizes accurate control.By the way that thermostat is arranged, thermostat is arranged on the cooling medium pipeline；Temperature control
The air side of the condensation fan is arranged in, so that in the hot wind and the process thermostat of condensation fan blowout in device
It exchanges heat between cooled medium in cooling medium pipeline；The hot wind that can be blown out by condensation fan is right in thermostat
Cooled medium in cooling medium pipeline carries out heat temperature raising, makes full use of condensation waste heat for heated cooling medium to target
Temperature range is more accurately adjusted without the load to refrigeration system, so that the refrigerant temperature of evaporator outlet
Fluctuation range can suitably amplify, and not will cause the obvious fluctuation of evaporator inner refrigerant state, to improve refrigeration system
Stability improve system performance and reliability, safety while reducing design difficulty without the electric heating of safety difference
Property.
Preferably,
When including the first temperature sensor 91 and second temperature sensor 92, examined by first temperature sensor 91
The cooling medium inlet temperature for measuring the thermostat 6 is Tb, detects the temperature control by the second temperature sensor 92
The cooling medium outlet temperature of device 6 is Ta；The target temperature of cooled medium is set as Ts；
When the refrigeration system starts, adjusts compressor frequency and/or electronic expansion valve opening and/or condensation fan turns
Speed, so that the temperature of Tb reaches Tb≤Ts+ △ t, the △ t is the first trueness error.It is preferred that (being generallyd use with most fast speed
Operating parameter under memory state carries out starting operation, there is the optimum operation combination parameter of unit under memory state).
This is the preferred control method of the starting refrigeration system of the invention according to cooling medium inlet temperature, is enabled to
By evaporator by cooled medium cooling down to the error range of target temperature Ts hereinafter, enabling to cooled Jie in this way
The temperature of matter is down to the error range of target temperature range hereinafter, in order to further heat up so that its water temperature reaches target temperature
Within the error range of degree.
Preferably,
As Ts- △ t- △ t1≤Tb≤Ts+ △ t, the compressor, the electric expansion valve and the condensating wind are maintained
The current operating conditions of machine, wherein the △ t1 is the second trueness error.This is the import of the invention according to cooled medium
Specific control mode when temperature is in the error range of target temperature, Ts- △ t- △ t1≤Tb≤Ts+ △ t explanation are cooled
The inlet temperature of medium has reached in the error range of target set temperature, at this moment only needs to maintain compressor, electric expansion valve
With the current state of condensation fan, it just can maintain the temperature of cooled medium in target temperature range, meet necessary requirement.It is excellent
Select △ t=0.5 DEG C, △ t1=0.5 DEG C.
Preferably,
As Tb < Ts- △ t- △ t1, and when including air-valve, then the air-valve 8 is opened, to pass through the thermostat 6
Heat temperature raising is carried out to the cooled medium, until meeting Ts- △ t- △ t1≤Tb≤Ts+ △ t again.It is controlled according to host
The operating status that logic readjusts above-mentioned load reduces refrigerating capacity output, preferably △ t=0.5 DEG C, △ t1=0.5 DEG C.
This is the preferred control when inlet temperature of cooled medium of the invention is less than in target set point error range
Mode, i.e. Tb < Ts- △ t- △ t1 illustrate that the inlet temperature of cooled medium is less than target set point error range, need to it
Heat temperature raising is carried out, opens air-valve at this time to realize the effect of heat temperature raising to cooled medium by the refrigerant in thermostat
Fruit realizes the effect to the accurate temperature controlling of medium.
Preferably,
Judge whether the cooling medium outlet temperature Ta meets-△ t≤Ts-Ta≤△ t, such as meets, then maintain existing
Valve area；
As Ts-Ta > △ t, then valve area is increased, and the aperture of the bigger air-valve of difference of Ts-Ta is bigger, until
Ta reaches-△ t≤Ts-Ta≤△ t, maintains valve area at this time；
As Ts-Ta <-△ t, then close the air-valve, and adjust the compressor frequency increase, the electronics it is swollen
At least one of the aperture of swollen valve increases and the revolving speed of the condensation fan increases, and increases refrigerating capacity.
This is the preferred control mode of the invention controlled according to cooling medium outlet temperature, i.e.-△ t≤Ts-
When Ta≤△ t illustrates that outlet temperature is in target set temperature error range, then keeps valve area constant, medium is somebody's turn to do
It continues for heating under state；Ts-Ta > △ t illustrates that medium outlet temperature is too low, needs to carry out increase system to medium at this time
The mode of heat is controlled, therefore increases the aperture of air-valve at this time, to increase the heating capacity to medium, the size of valve area
It is proportional with the size of the temperature difference (Ts-Ta), it can promote to prestissimo the temperature of medium；Ts-Ta <-△ t illustrates that medium goes out
Mouth temperature is excessively high, and the mode for needing to carry out medium stopping heating at this time then freezing controls, at this time described in closing
Air-valve, and adjust the revolving speed of the compressor frequency increase, the aperture increase and the condensation fan of the electric expansion valve
At least one of increase, so as to be effectively reduced the temperature of medium, to reach in target temperature range, satisfaction makes
Use demand.
Specifically, the mainly hot-air in thermostat and the cryogenic freezing medium of other side carry out Exchange of apparent heat, no
It is related to the adjusting control of refrigeration system, is conducive to the stable operation of refrigeration system.The specific master of unit water system target temperature
Want rate-determining steps as follows:
1) when running, according to set temperature Ts, compressor frequency and/or electronic expansion valve opening and/or condensating wind are adjusted
Machine revolving speed (is generallyd use the operating parameter under memory state and carries out starting operation, have unit under memory state with most fast speed
Optimum operation combination parameter) making Tb≤Ts+ △ t, (△ t is that user sets temperature-controlled precision, such as set and controls precision as ± 0.5
DEG C, then △ t=0.5, remaining is similar)；As Ts- △ t-0.5≤Tb≤Ts+ △ t, the operating status of above-mentioned load is maintained；
2) as Tb < Ts- △ t-0.5, then reduced according to the operating status that host control logic readjusts above-mentioned load
Refrigerating capacity output, until meeting Ts- △ t-0.5≤Tb≤Ts+ △ t again；
A) judge whether outlet temperature-△ t≤Ts-Ta≤△ t is true.If so, then maintaining existing valve area；
B) as Ts-Ta > △ t, then valve area is increased, and the aperture of the bigger air-valve of difference of Ts-Ta is bigger, directly
Valve area is maintained when to-△ t≤Ts-Ta≤△ t；
C) as Ts-Ta <-△ t, then air-valve is closed, the load for switching to adjust refrigeration system is so that the refrigerating capacity of system adds
Greatly, step 1) is reentered.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.With
It is only the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection scope of invention.
Claims (13)
1. a kind of refrigeration system, it is characterised in that: include:
Compressor (1), condenser (2), condensation fan (21), electric expansion valve (3) and evaporator (4)；
Cooling medium pipeline (5), wherein being connected with cooled medium, and the cooling medium pipeline (5) is passed through the evaporator (4)
In, refrigerant and cooled medium are exchanged heat in the evaporator (4)；
Thermostat (6) is arranged on the cooling medium pipeline (5), and the thermostat (6) is arranged in the condensation fan
(21) air side, so that the hot wind of the condensation fan (21) blowout and by the cooling medium in the thermostat (6)
It exchanges heat between cooled medium in pipeline (5).
2. refrigeration system according to claim 1, it is characterised in that:
The thermostat (6) is arranged on the cooling medium pipeline (5) and is located at along cooled medium flow direction, the steaming
Send out the tract of device (4).
3. refrigeration system according to claim 1 or 2, it is characterised in that:
The thermostat (6) includes the air-valve (8) of air duct (61) and setting in the air duct (61) inlet, the air-valve (8)
The air duct (61) can be controlled and open and close and adjust opening size.
4. refrigeration system according to any one of claim 1-3, it is characterised in that:
Input end on the cooling medium pipeline (5) positioned at the thermostat (6) is provided with the first temperature sensor (91).
5. refrigeration system described in any one of -4 according to claim 1, it is characterised in that:
Outlet end on the cooling medium pipeline (5) positioned at the thermostat (6) is provided with second temperature sensor (92).
6. refrigeration system according to claim 4 or 5, it is characterised in that:
When including the first temperature sensor (91), first temperature sensor (91) is temperature sensing package；When including second temperature
When sensor (92), the second temperature sensor (92) is temperature sensing package.
7. refrigeration system according to claim 1 to 6, it is characterised in that:
The thermostat (6) is finned heat exchanger, and the finned heat exchanger includes the heat-dissipating pipe of outer wall belt annular fin
(62) or the heat-dissipating pipe of outer wall belt longitudinal fin (62), and the heat-dissipating pipe (62) of the outer wall belt annular fin is arranged as pipe axis
Direction and the air-out direction of the condensation fan are perpendicular, and the heat-dissipating pipe (62) of the outer wall belt longitudinal fin is arranged as pipe axis
Direction is parallel with the air-out direction of the condensation fan.
8. refrigeration system described in any one of -7 according to claim 1, it is characterised in that:
The cooled medium be water, water be passed through the cooling medium pipeline (5) first pass through in the evaporator (4) be cooled,
Then again into the excessively described thermostat (6) can be heated.
9. a kind of control method of refrigeration system, it is characterised in that: use the refrigeration system of any of claims 1-8
System realizes accurate control to the temperature of cooled medium.
10. control method according to claim 9, it is characterised in that:
When including the first temperature sensor (91) and second temperature sensor (92), pass through first temperature sensor (91)
The cooling medium inlet temperature for detecting the thermostat (6) is Tb, detects institute by the second temperature sensor (92)
The cooling medium outlet temperature for stating thermostat (6) is Ta；The target temperature of cooled medium is set as Ts；
When the refrigeration system starts, compressor frequency and/or electronic expansion valve opening and/or condensation fan revolving speed are adjusted, is made
The temperature for obtaining Tb reaches Tb≤Ts+ △ t, and the △ t is the first trueness error.
11. control method according to claim 10, it is characterised in that:
As Ts- △ t- △ t1≤Tb≤Ts+ △ t, the compressor, the electric expansion valve and the condensation fan are maintained
Current operating conditions, wherein the △ t1 is the second trueness error.
12. control method according to claim 10, it is characterised in that:
As Tb < Ts- △ t- △ t1, and when including air-valve, then the air-valve (8) are opened, to pass through the thermostat (6)
Heat temperature raising is carried out to the cooled medium, until meeting Ts- △ t- △ t1≤Tb≤Ts+ △ t again.
13. control method according to claim 12, it is characterised in that:
Judge whether the cooling medium outlet temperature Ta meets-△ t≤Ts-Ta≤△ t, such as meets, then maintain existing air-valve
Aperture；
As Ts-Ta > △ t, then valve area is increased, and the aperture of the bigger air-valve of difference of Ts-Ta is bigger, until Ta reaches
To-△ t≤Ts-Ta≤△ t, valve area is maintained at this time；
As Ts-Ta <-△ t, then the air-valve is closed, and adjusts the compressor frequency increase, the electric expansion valve
Aperture increase and the condensation fan revolving speed increase at least one of, increase refrigerating capacity.
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| CN201811366700.7A CN109341121B (en) | 2018-11-16 | 2018-11-16 | Refrigeration system and control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303965A (en) * | 2019-07-26 | 2021-02-02 | 株式会社鹭宫制作所 | Cooling device |
| CN112384040A (en) * | 2020-11-12 | 2021-02-19 | 中国电子科技集团公司第二十九研究所 | Skin heat exchange bypass control system and control method thereof |
| CN113400086A (en) * | 2021-07-01 | 2021-09-17 | 珠海格力智能装备有限公司 | Cooling system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200958814Y (en) * | 2006-10-12 | 2007-10-10 | 南京建贸制冷空调设备有限公司 | Water-cooling and temperature-adjusting dehumidifier set |
| CN102338428A (en) * | 2010-07-26 | 2012-02-01 | 珠海格力电器股份有限公司 | Total-heat-recovery-type fresh air dehumidifier unit |
| CN202254135U (en) * | 2011-08-22 | 2012-05-30 | 珠海铨高机电设备有限公司 | Dehumidifying and reheating device of air conditioner |
| CN203837360U (en) * | 2014-05-16 | 2014-09-17 | 清华大学 | Solution-spraying-type frostless air source heat pump device |
| CN205425262U (en) * | 2016-03-18 | 2016-08-03 | 上海朗绿建筑科技有限公司 | Fresh air dehumidification unit of many condensers of single evaporimeter |
-
2018
- 2018-11-16 CN CN201811366700.7A patent/CN109341121B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200958814Y (en) * | 2006-10-12 | 2007-10-10 | 南京建贸制冷空调设备有限公司 | Water-cooling and temperature-adjusting dehumidifier set |
| CN102338428A (en) * | 2010-07-26 | 2012-02-01 | 珠海格力电器股份有限公司 | Total-heat-recovery-type fresh air dehumidifier unit |
| CN202254135U (en) * | 2011-08-22 | 2012-05-30 | 珠海铨高机电设备有限公司 | Dehumidifying and reheating device of air conditioner |
| CN203837360U (en) * | 2014-05-16 | 2014-09-17 | 清华大学 | Solution-spraying-type frostless air source heat pump device |
| CN205425262U (en) * | 2016-03-18 | 2016-08-03 | 上海朗绿建筑科技有限公司 | Fresh air dehumidification unit of many condensers of single evaporimeter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303965A (en) * | 2019-07-26 | 2021-02-02 | 株式会社鹭宫制作所 | Cooling device |
| CN112384040A (en) * | 2020-11-12 | 2021-02-19 | 中国电子科技集团公司第二十九研究所 | Skin heat exchange bypass control system and control method thereof |
| CN113400086A (en) * | 2021-07-01 | 2021-09-17 | 珠海格力智能装备有限公司 | Cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109341121B (en) | 2020-03-10 |
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