CN206073329U - A kind of refrigeration air-cooled unit - Google Patents
A kind of refrigeration air-cooled unit Download PDFInfo
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- CN206073329U CN206073329U CN201620977381.3U CN201620977381U CN206073329U CN 206073329 U CN206073329 U CN 206073329U CN 201620977381 U CN201620977381 U CN 201620977381U CN 206073329 U CN206073329 U CN 206073329U
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Abstract
This utility model provides a kind of refrigeration air-cooled unit, including：The steam compression cycle loop being formed by connecting by compressor (1), condensing units (2), expansion valve (3), vaporizer (4), and also include forming natural cooling closed circuit by the connection of the refrigerated medium pump (5), the condensing units (2) and the vaporizer (4)；Refrigerating medium in the vaporizer (4) is water；The condensing units (2) include multiple condensers (21) being arranged in parallel, and the natural cooling closed circuit includes at least one of multiple described condensers (21).The condensation area of natural cooling circulation can effectively be reduced by this utility model and then the outlet temperature of condensing units is reduced, effectively prevent vaporizer to be damaged by frost, be realized while taking into account the antifreeze purpose and effect with maintenance refrigerating efficiency of vaporizer.
Description
Technical field
This utility model belongs to refrigeration technology field, and in particular to a kind of refrigeration air-cooled unit.
Background technology
Super low temperature refrigeration air-cooled unit on existing market, as ambient temperature is low, according to water as refrigerating medium, pole holds
The easy freezing package pressure vessel as vaporizer, therefore, more using glycol water as refrigerating medium, as shown in Figure 1,
Steam compression type refrigeration is circulated and circulates two sets of autonomous systems each other with natural cooling, is not shared cold-producing medium, is shared a vaporizer
Give end feed cold.It is freezing that the advantage of the technology is that vaporizer is difficult, and reliability is higher, but shortcoming is：1) ethylene glycol
Solution needs end circulation indoors, has the danger of leakage；2) heat exchange efficiency of glycol water is relatively low, runs in summer high temperature
When energy consumption it is larger.
As super low temperature refrigeration air-cooled unit of the prior art cannot be taken into account simultaneously, shell-tube evaporator is antifreeze and refrigeration is imitated
The technical problems such as rate, therefore this utility model research design goes out a kind of refrigeration air-cooled unit.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome refrigeration air-cooled unit of the prior art to there is nothing
Method takes into account the antifreeze defect with refrigerating efficiency of vaporizer simultaneously, so as to provide a kind of refrigeration air-cooled unit.
This utility model provides a kind of refrigeration air-cooled unit, and which includes：
The steam compression cycle loop being formed by connecting by compressor, condensing units, expansion valve, vaporizer,
Also include being connected by refrigerated medium pump, the condensing units and the vaporizer and form natural cooling closed circuit；
Refrigerating medium in the vaporizer is water；The condensing units include multiple condensers being arranged in parallel, and described
Natural cooling closed circuit includes at least one of multiple described condensers.
Preferably, in the natural cooling closed circuit, the refrigerated medium pump is arranged in parallel in the expansion valve two ends,
And be also connected between the compressor and the condensing units including one end, the other end is connected to the branch road in the vaporizer, and
Described one end of the branch road is connected at least one of multiple described condensers.
Preferably, described one end of the branch road is connected to the entrance point of any one in multiple condensers.
Preferably, it is provided with each described condenser for adjusting the frequency conversion fan of condensation effect.
Preferably, it is provided with the pipeline between the compressor and the vaporizer on the first valve, the branch road and arranges
There is the second valve.
Preferably, on the pipeline that at least one of multiple described condensers are located, and/or, in the institute of the branch road
State on the pipeline between one end and the compressor, be provided with for prevent cold-producing medium to the compressor direction flow back it is unidirectional
Valve；
And/or, it is provided with for preventing what cold-producing medium from flowing back to the compressor direction in the port of export of the compressor
Check-valves.
Preferably, heater is additionally provided with the vaporizer.
Preferably, the heater is electric heater unit.
Preferably, the condenser is fin-tube heat exchanger, and/or, the vaporizer is shell and tube evaporator.
Preferably, the refrigeration air-cooled unit is low temperature refrigerator group or super low temperature refrigeration unit.
A kind of refrigeration air-cooled unit that this utility model is provided has the advantages that：
1. refrigeration air-cooled unit of the present utility model, by selecting to be water refrigerating medium, can effectively improve unit
Refrigerating efficiency, and by natural cooling closed circuit is included at least one of multiple condensers, can be according to vaporizer
In inlet temperature select suitable condenser to be condensed, reduce the condenser number for participating in condensation when needing antifreeze, from
And effectively reduce the condensation area of natural cooling circulation and then reduce the outlet temperature of condensing units, it is effectively prevented vaporizer
It is damaged by frost, realizes while taking into account the antifreeze purpose and effect with maintenance refrigerating efficiency of vaporizer；
2. refrigeration air-cooled unit of the present utility model, can be realized to cold by adjusting its air quantity by arranging frequency conversion fan
The regulation of condenser degree of condensation, reduces the frequency of frequency conversion fan when needing antifreeze, reduces air quantity, reduces condensation effect, reduces
The outlet temperature of condensing units, has further functioned as and has efficiently controlled the purpose and effect for preventing vaporizer to be damaged by frost；
3. refrigeration air-cooled unit of the present utility model, by arranging the first valve and the second valve, can control both vapor compression
While the opening and closing of closed circuit and natural cooling closed circuit, moreover it is possible to control unit under shutdown or holding state
By closing two valves so that the cold-producing medium in vaporizer can not be evaporated in condenser, so as to maintain the pressure in vaporizer
Always in higher state, and then the effectively probability of reduction cold-producing medium evaporation endothermic in vaporizer, further function as control
Prevent purpose and effect that vaporizer is damaged by frost；
4. refrigeration air-cooled unit of the present utility model, by arranging heater on an evaporator, can be standby in unit
Its work of controller under machine or stopped status, so as to maintain the inlet refrigerant temperature of vaporizer, serves and prevents
Purpose and effect that only vaporizer is damaged by frost；
5. refrigeration air-cooled unit of the present utility model, unit is standby or stopped status under, when detecting fin liquid pipe temperature
When degree is less than the first preset temperature T1, refrigerated medium pump and the second valve are opened, due to the cold-producing medium flowing in vaporizer and relatively
The water heat exchange of high-temperature so that evaporator refrigerant temperature is raised, it is achieved thereby that the automatic freezing-protective function of vaporizer, rises
To the purpose and the effect that further control to prevent vaporizer to be damaged by frost；
6. refrigeration air-cooled unit of the present utility model, in natural cooling loop start, by not using whole fins
Condenser, has enough liquid refrigerants in enabling to vaporizer, simultaneously close off the first valve and the second valve enables to condensation
There is a small amount of gaseous refrigerant in device, so as to ensure that refrigerated medium pump all has refrigerant liquid when opening before pump and after pump
Body, and then when being effectively guaranteed the startup of natural cooling closed circuit, circulation normally can be set up, and realize normal naturally cold
But circulate.
Description of the drawings
Fig. 1 is the structural representation of refrigeration air-cooled unit of the prior art；
Fig. 2 is the structural representation of refrigeration air-cooled unit of the present utility model.
In figure, reference is expressed as：
1-compressor, 2-condensing units, 21-condenser, 22-frequency conversion fan, 3-expansion valve, 4-vaporizer, 5-
Refrigerated medium pump, 6-branch road, the 7-the first valve, the 8-the second valve, 9-check valve, 10-check-valves.
Specific embodiment
As shown in Fig. 2 this utility model provides a kind of refrigeration air-cooled unit (preferably cryogenic refrigeration air-cooled unit or ultralow
Temperature refrigeration air-cooled unit, is typically divided into following field by temperature range：More than 120K is general cold；120～0.3K, low temperature；
Below 0.3K, ultralow temperature), which includes：
Compressor 1, condensing units 2, expansion valve 3, vaporizer 4 and the steam compression cycle by above-mentioned unit Series
Loop,
And also include being arranged in parallel being connected to the compressor 1 in the refrigerated medium pump 5 at 3 two ends of the expansion valve, and one end
And the condensing units 2 between, the other end be connected to the branch road 6 in the vaporizer 4, by the refrigerated medium pump 5, the condensation
The connection of device 2, the vaporizer 4 and the branch road 6 forms natural cooling closed circuit；
The steam compression cycle loop shares cold-producing medium with the natural cooling closed circuit, in the vaporizer 4
Refrigerating medium is water；The condensing units 2 include multiple condensers 21 being arranged in parallel, and described one end of the branch road 6 is connected to
At least one of multiple described condensers 21.
Refrigeration air-cooled unit of the present utility model, by selecting to be water refrigerating medium, can effectively improve the system of unit
Cold efficiency, and by by natural cooling closed circuit include at least one of multiple condensers (will branch road be connected to it is many
At least one of individual condenser), suitable condenser can be selected to be condensed according to the inlet temperature in vaporizer, needed
Reduce the condenser number for participating in condensation when wanting antifreeze, so as to effectively reducing the condensation area of natural cooling circulation and then reducing
The outlet temperature of condensing units, is effectively prevented vaporizer and is damaged by frost, realize and meanwhile take into account vaporizer it is antifreeze and maintain refrigeration
The purpose and effect of efficiency.
Preferably, described one end of the branch road 6 is connected to the entrance point of any one in multiple condensers 21.This
Be natural cooling loop of the present utility model connection condenser it is optimal preferred embodiment, by branch road is connected to one
Condenser, the condensation area enabled in natural cooling loop are down to minimum, so as to farthest reduce condensing units
Outlet temperature, farthest prevent vaporizer to be damaged by frost, and realizes while to take into account vaporizer antifreeze and maintain refrigerating efficiency
Purpose and effect.
Preferably, it is provided with each described condenser 21 for adjusting condensation effect (or claiming to lift heat transfer effect)
Frequency conversion fan 22.Can pass through to adjust its regulation of air quantity realization to condenser degree of condensation by arranging frequency conversion fan, need
Reduce the frequency of frequency conversion fan when wanting antifreeze, reduce air quantity, reduce condensation effect, reduce the outlet temperature of condensing units, enter one
Step is served and efficiently controls the purpose and effect for preventing vaporizer to be damaged by frost.
Preferably, the first valve 7 is provided with the pipeline between the compressor 1 and the vaporizer 4 (preferably electronic
Valve), be provided with the second valve 8 (preferably also electrodynamic valve) on the branch road 6.By arranging the first valve and the second valve, can be in control
While the opening and closing of steam compression cycle loop processed and natural cooling closed circuit, moreover it is possible to control unit and shutting down or treating
By closing two valves under machine state so that the cold-producing medium in vaporizer can not be evaporated in condenser, so as to maintain vaporizer
In pressure always in higher state, and then effectively reduce the probability of cold-producing medium evaporation endothermic in vaporizer, further serve as
To the purpose and the effect that control to prevent vaporizer to be damaged by frost.
Preferably, heater is additionally provided with the vaporizer 4.By arranging heater on an evaporator, can
Its work of controller under the standby machine of unit or stopped status, so as to maintain the inlet refrigerant temperature of vaporizer, serve into
One step controls purpose and the effect for preventing vaporizer to be damaged by frost.
Preferably, the heater is electric heater unit, more preferably heating tape.This is system of the present utility model
The preferred kind and version of the heater of cold air-cooled unit.
Preferably, on the pipeline that at least one of multiple described condensers 21 are located, and/or, in the branch road 6
On pipeline between described one end and the compressor 1, it is provided with for preventing what cold-producing medium from flowing back to 1 direction of the compressor
Check valve 9；
And/or, it is provided with for preventing cold-producing medium from flowing back to 1 direction of the compressor in the port of export of the compressor 1
Check-valves 10.
By on the pipeline that at least one of multiple described condensers are located, and branch road described one end with it is described
On pipeline between compressor 1 arrange check valve version, and the compressor the port of export arrange check-valves,
Cold-producing medium can be effectively prevented to flow back to compressor, so as to prevent the mode, effectively of the situation of closed circuit abnormal work
Ensure unit safety, reliably run.
Preferably, the condenser 21 is fin-tube heat exchanger, and/or, the vaporizer 4 is shell and tube evaporator.
This is the concrete species and version of the condenser of refrigeration air-cooled unit of the present utility model, and the concrete species of vaporizer
And version.
Preferably, the refrigeration air-cooled unit is low temperature refrigerator group or super low temperature refrigeration unit.Temperature range is pressed typically
It is divided into following field：More than 120K is general cold；120～0.3K, low temperature；Below 0.3K, ultralow temperature are certainly yet different
Point-score, but low temperature refrigerator group and super low temperature refrigeration unit are can adapt to lower for common refrigeration unit
Temperature environment, and work under the low temperature environment, and be not damaged by frost, which has more excellent conformability, for this reality
More it is suitable for new anti-frost protection.
This utility model also provides a kind of control method of refrigeration air-cooled unit, and which uses aforesaid refrigeration air-cooled unit,
The antifreeze of the vaporizer is controlled.The control method of refrigeration air-cooled unit of the present utility model, by using aforesaid
Refrigeration air-cooled unit, adopt refrigerating medium selection as water, can effectively improve the refrigerating efficiency of unit, and by will be naturally cold
But the branch road in closed circuit is connected at least one of multiple condensers, can be selected according to the inlet temperature in vaporizer
Suitable condenser is condensed, and reduces the condenser number for participating in condensation when needing antifreeze, cold so as to effectively reduce nature
But the condensation area for circulating and then the outlet temperature for reducing condensing units, are effectively prevented vaporizer and are damaged by frost, and realize same
When take into account vaporizer it is antifreeze and maintain refrigerating efficiency purpose and effect.
Preferably, when natural cooling is circulated, and when the unit includes branch road 6, adjust and reduce and the branch road phase
The quantity of multiple condensers being arranged in parallel even.By such control mode and regulating step, can follow in natural cooling
During ring, can effectively reduce condensation area, so as to reduce condensation effect, lift the purpose of condensator outlet temperature.
Preferably, when frequency conversion fan 22 is additionally provided with the condenser 21, adjust described in being connected with the branch road 6
The frequency of the frequency conversion fan 22 on condenser 21 is reduced, and then reduces the air quantity of its generation.By adjusting frequency conversion fan frequency drop
It is low, the air quantity of its generation can be reduced, and then is reached when natural cooling circulate and is further reduced condensation effect, lifting condenser
The effect and purpose of outlet temperature.
Preferably, unit is standby and starting state under, i.e., shutdown or it is standby when, and when with the first and second valves (
Preferably electrodynamic valve) when, close the first valve and the second valve so that the cold-producing medium in vaporizer can not be evaporated in condensing units.
By closing the first and second valves, enable to the cold-producing medium in shell-tube evaporator and can not be evaporated in condensing units, so as to tie up
The pressure in shell-tube evaporator is held always in higher numeric state, and then effectively improves the evaporation temperature of the saturation in vaporizer
Degree so that the evaporation endothermic probability of cold-producing medium is reduced, unit is standby and starting state under serve control and prevent evaporation
Purpose and effect that device is damaged by frost.
Preferably, when heater being provided with the vaporizer, can wrap up heat tracing at the liquid pipe of shell-tube evaporator
Band, controls the heater work under standby or stopped status, and heating tape is started working, and maintains the import refrigeration of vaporizer
Agent temperature.Its work is made by the heater on the control vaporizer under the standby machine of unit or stopped status, can be effective
Ground maintains or improves the inlet refrigerant temperature of vaporizer, serves purpose and the effect for further controlling to prevent vaporizer to be damaged by frost
Really.
Preferably, package automatic freezing-protective function, the temperature (temperature of preferred fin liquid pipe in condensing units are detected are increased
Degree, the temperature of detection is ambient temperature, i.e. the inlet temperature of condenser) less than the first preset temperature T1 when, open refrigerated medium pump
And second valve；Due to cold-producing medium flowing and the water heat exchange of comparative high temperature in vaporizer, in the short time that valve is opened, package enters
Mouthful refrigerant temperature can reduce, it is stable after can rise so that shell-tube evaporator inlet refrigerant temperature raise,
When temperature (temperature of preferred fin liquid pipe) in condensing units are detected is higher than the second preset temperature T2, close
Refrigerated medium pump and the second valve.
The selection gist of T1 and T2 is the range of operation of compressor, can exceed compressor when the temperature for detecting is too low
Range of operation, and T1 ＜ T2；Both do not adopt identical temperature to be in order to avoid the frequent start-stop for occurring valve during temperature fluctuation.
The bigger operation of [T1, T2] scope is more stable in theory.
During detection temperature T ＜ T1, refrigerant pump (natural cooling) is run；During T ＞ T2, compressor is run；During T1 ＞ T ＞ T2,
Maintain current operating conditions.
Unit is standby or stopped status under, when fin liquid pipe temperature is detected less than the first preset temperature T1, open
Refrigerated medium pump and the second valve, as the water in vaporizer, by cold-producing medium flowing with comparative high temperature exchanges heat, what valve was opened
In short time, the refrigerant temperature of package import can be reduced, it is stable after can rise so that evaporator cold-producing medium
Temperature is raised, it is achieved thereby that the automatic freezing-protective function of vaporizer, serving further control prevents the mesh that vaporizer is damaged by frost
And effect.
Preferably, in natural cooling loop start, and when the unit includes branch road 6, control the institute of the branch road
The fractional distilling tube that one end is connected in all condensers is stated, so as to not use whole fin condensers so that package
There are enough liquid refrigerants side；
When unit is standby or shuts down, and when first valve and second valve is also included, first valve is closed
With second valve so that there is a small amount of gaseous refrigerant in condensing units (fin).
As natural cooling circulation foundation needs before pump and need refrigerant liquid after pump when refrigerated medium pump is opened,
Because the cold-producing medium total amount of total system is constant, so in natural cooling loop start, by not using whole fin colds
Condenser, has enough liquid refrigerants in enabling to vaporizer, simultaneously close off the first valve and the second valve enables to condenser
In there is a small amount of gaseous refrigerant, so as to ensure that refrigerated medium pump open when all there is before pump and after pump refrigerant liquid,
And then when being effectively guaranteed the startup of natural cooling closed circuit, circulation normally can be set up, and realize that normal natural cooling is followed
Ring.
Operation principle of the present utility model and preferred embodiment is described below
This paper presents it is a kind of solve cryogenic refrigeration scheme, equally employ compressor it is steam-refrigerated circulation with it is naturally cold
But the mode for circulating.From unlike usual way on market, the different kind of refrigeration cycle mode common cold-producing mediums of two kinds of this programme, and
Using water as refrigerating medium, while taking into account, shell-tube evaporator is antifreeze and refrigerating efficiency.
The technical problem of solution：
1st, when ultralow temperature natural cooling Cycle Unit is run, solve to surpass by becoming condenser area, condensation side Boiler pressure control
During low temperature natural cooling circular flow, evaporating pressure is low, condensing pressure is low, the low problem of package inlet temperature；
2nd, increase related valve and electric heater unit and solve unit, automatic freezing-protective function is set, when package import liquid pipe compared with
When low, refrigerated medium pump is opened, lift inlet temperature, shell-tube evaporator bursting by freezing when solving the problems, such as that unit ultralow temperature is standby and starts；
3rd, increase related valve solution unit natural cooling starting up's circulation and cannot set up problem.
Beneficial effect：
1st, compressor cycle and natural cooling circulation is automatically switched, and realizes -40 DEG C～46 DEG C wide scope refrigeration, improves system
Cold efficiency；
2nd, ultralow temperature natural cooling circulation efficiency energy-saving；
3rd, using water as cold-producing medium, easy care, low cost.
This utility model：
1. when realizing natural cooling circulation, fin condensation area is become, so as to condensation pressure is lifted under circulating in cryogenic refrigeration
Power (effect for lifting condensing pressure as lifts condensator outlet temperature).Ensure unit operation reliability, and carry out kind of refrigeration cycle
Capacity adjusting.
2., when realizing shutdown natural cooling circulation, cold-producing medium is limited in into the used system stream of natural cooling circulation
In.Cold-producing medium is cannot be introduced in the no finned heat exchanger of compressor, so as to avoid in natural cooling circulation process, cold-producing medium
Migrate to compressor and its associated ping.When solving natural cooling circulation, circulating refrigerant pump is not enough, causes to make cold-producing medium
Liquid refrigerant is not all before pump, so as to normal natural cooling circulation cannot be realized.
As shown in Fig. 2 flow process during operation steam compression type refrigeration：
Compressor → tetra- piece finned heat exchanger → electric expansion valve → vaporizer → the first valve (preferably electrodynamic valve) → pressure
Contracting machine
When vapour compression machine formula is circulated, the first valve 7 (preferably electrodynamic valve) is opened, and the second valve 8 (preferably electrodynamic valve) is closed
Close, refrigerated medium pump 5 is closed, after compressor 1 is opened, the cryogen gaseous of High Temperature High Pressure are condensed into in 4 finned heat exchangers
The refrigerant liquid of middle temperature high pressure, liquid refrigerant entered expansion valve 3 (preferably electric expansion valve) after entering check valve, swollen
Vaporizer 4 is entered after the throttling of swollen valve 3, is evaporated with chilled water heat exchange in vaporizer 4, is become low-temperature low-pressure refrigerant gas process
Check-valves enter compressor 1.
Flow process when operation refrigerated medium pump freezes：
Refrigerated medium pump → vaporizer → the second valve (preferably electrodynamic valve) → a piece of finned heat exchanger → electric expansion valve
When refrigeration pump natural cooling is circulated, the first valve 7 (preferably electrodynamic valve) cuts out, the second valve 8 (preferably electrodynamic valve)
Open, compressor 1 is closed, and expansion valve 3 cuts out, after refrigerated medium pump 5 is opened, low temperature liquid cold-producing medium enters vaporizer 4 and freezing
Water exchanges heat, and flashes to the refrigerant gas of middle temperature low pressure, and through the second valve 8, the heat exchange in air-cooled condenser becomes Low Temperature Liquid
Cryogen, is then return to refrigerated medium pump 5.
Specific embodiment：
Before the technical problem that the program is solved, 2 points are primarily directed to the antifreeze aspect of package, and the 3rd point feasible for natural cooling
Property.
To prevent package bursting by freezing, mainly from from the aspect of two：
1) package refrigerant inlet temperature control, design are not less than -5 DEG C；
2) the corresponding saturation temperature of evaporating pressure maintains more than 0 DEG C always.
【Problem 1】
Purpose：Solve package antifreeze problem when natural cooling stable circulation runs.
Measure：When natural cooling is circulated, under ultra-low temperature surroundings (such as -40 DEG C), cold-producing medium is in Fin-tube Condenser
In condensation effect it is very good, refrigerant temperature (i.e. refrigerated medium pump inlet temperature) very low, the ultra low temperature of condensator outlet
Cold-producing medium exchange heat with water after refrigerated medium pump enters package, substantial amounts of latent heat is produced in the short time, it is easy to freezing package
Heat exchanger tube in vaporizer, therefore, need to control condensator outlet temperature on the premise of refrigeration capacity requirement is ensured.
Mainly it is controlled in terms of two,
1) air quantity is adjusted by using frequency conversion fan；
2) reduce condensation area when natural cooling is circulated, so as to reduce condensation effect, lift condensator outlet temperature
Purpose.
【Problem 2】
Purpose：Solve the antifreeze problem of package under standby and starting state.
Measure：1), when shutting down or be standby, the first valve 7, the second valve 8 are closed so that the cold-producing medium in package can not be evaporated to
In condenser, so as to maintain package pressure to maintain higher state always, and then the steaming of the saturation in vaporizer is effectively improved
Send out temperature so that the evaporation endothermic probability of cold-producing medium is reduced；
2) heating tape is wrapped up at package liquid pipe, heating tape is started working under standby or stopped status, maintains or improve package
Inlet refrigerant temperature.
3) increase package automatic freezing-protective function, when fin liquid pipe temperature being detected less than the first preset temperature T1, open
Refrigerated medium pump and the second valve, as water of the cold-producing medium flowing with comparative high temperature exchanges heat so that package inlet refrigerant temperature
Raise, refrigerated medium pump and the second valve are closed when fin liquid pipe temperature is higher than the second preset temperature T2.The selection gist of T1 and T2
It is the range of operation of compressor, the range of operation of compressor, and T1 ＜ T2 can be exceeded when the temperature for detecting is too low；Both are not
Occurs the frequent start-stop of valve when being in order to avoid temperature fluctuation using identical temperature.The bigger operation of [T1, T2] scope in theory
It is more stable.
During detection temperature T ＜ T1, refrigerant pump (natural cooling) is run；During T ＞ T2, compressor is run；During T1 ＞ T ＞ T2,
Maintain current operating conditions.
【Problem 3】
Purpose：When solving natural cooling loop start, circulation cannot set up problem.
Measure：Natural cooling circulation foundation needs before pump and need refrigerant liquid after pump when refrigerated medium pump is opened
Body, because the cold-producing medium total amount of total system is constant, when natural cooling is circulated, does not use whole fin condensers so that
There are enough liquid refrigerants package side.When unit is standby and shuts down, the first valve and the second valve are closed immediately so that in fin
There is a small amount of gaseous refrigerant, before and after refrigerated medium pump can be ensured, there are enough liquid refrigerants, smoothly set up natural cooling circulation.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each advantageous manner can be free
Ground combination, superposition.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.The above is only preferred implementation of the present utility model, it is noted that for the art
For those of ordinary skill, on the premise of without departing from this utility model know-why, some improvement and modification can also be made,
These improve and modification also should be regarded as protection domain of the present utility model.
Claims (10)
1. a kind of refrigeration air-cooled unit, it is characterised in that：Including：
The steam compression cycle loop being formed by connecting by compressor (1), condensing units (2), expansion valve (3), vaporizer (4),
Also including, natural cooling is formed by the connection of refrigerated medium pump (5), the condensing units (2) and the vaporizer (4) loops back
Road；
Refrigerating medium in the vaporizer (4) is water；The condensing units (2) include multiple condensers (21) being arranged in parallel,
And the natural cooling closed circuit includes at least one of multiple described condensers (21).
2. refrigeration air-cooled unit according to claim 1, it is characterised in that：In the natural cooling closed circuit, institute
State refrigerated medium pump (5) to be arranged in parallel in the expansion valve (3) two ends, and also the compressor (1) and described is connected to including one end
Between condensing units (2), the other end be connected to the branch road (6) in the vaporizer (4), and described one end of the branch road (6) connects
At least one of to multiple described condensers (21).
3. refrigeration air-cooled unit according to claim 2, it is characterised in that：Described one end of the branch road (6) is connected to
The entrance point of any one in multiple condensers (21).
4. the refrigeration air-cooled unit according to one of claim 2-3, it is characterised in that：On each described condenser (21)
It is provided with for adjusting the frequency conversion fan (22) of condensation effect.
5. the refrigeration air-cooled unit according to one of claim 2-3, it is characterised in that：The compressor (1) and the steaming
Send out to be provided with the first valve (7), the branch road (6) on the pipeline between device (4) and be provided with the second valve (8).
6. the refrigeration air-cooled unit according to one of claim 2-3, it is characterised in that：In multiple condensers (21)
At least one place pipeline on, and/or, the pipeline between described one end of the branch road (6) and the compressor (1)
On, it is provided with the check valve (9) for preventing cold-producing medium from flowing back to the compressor (1) direction；
And/or, it is provided with for preventing cold-producing medium from flowing back to the compressor (1) direction in the port of export of the compressor (1)
Check-valves (10).
7. the refrigeration air-cooled unit according to one of claim 1-3, it is characterised in that：Also set up on the vaporizer (4)
There is heater.
8. refrigeration air-cooled unit according to claim 7, it is characterised in that：The heater is electric heater unit.
9. the refrigeration air-cooled unit according to claim 1-3, described in one of 8, it is characterised in that：The condenser (21) is fin
Pipe heat exchanger, and/or, the vaporizer (4) is shell and tube evaporator.
10. the refrigeration air-cooled unit according to claim 1-3, described in one of 8, it is characterised in that：It is described refrigeration air-cooled unit be
Low temperature refrigerator group or super low temperature refrigeration unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620977381.3U CN206073329U (en) | 2016-08-29 | 2016-08-29 | A kind of refrigeration air-cooled unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620977381.3U CN206073329U (en) | 2016-08-29 | 2016-08-29 | A kind of refrigeration air-cooled unit |
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| Publication Number | Publication Date |
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| CN206073329U true CN206073329U (en) | 2017-04-05 |
Family
ID=58434504
Family Applications (1)
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| CN201620977381.3U Active CN206073329U (en) | 2016-08-29 | 2016-08-29 | A kind of refrigeration air-cooled unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225126A (en) * | 2016-08-29 | 2016-12-14 | 珠海格力电器股份有限公司 | A kind of refrigeration air-cooled unit and control method thereof |
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2016
- 2016-08-29 CN CN201620977381.3U patent/CN206073329U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225126A (en) * | 2016-08-29 | 2016-12-14 | 珠海格力电器股份有限公司 | A kind of refrigeration air-cooled unit and control method thereof |
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