CN209147486U - A kind of refrigeration system - Google Patents

A kind of refrigeration system Download PDF

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Publication number
CN209147486U
CN209147486U CN201821899579.XU CN201821899579U CN209147486U CN 209147486 U CN209147486 U CN 209147486U CN 201821899579 U CN201821899579 U CN 201821899579U CN 209147486 U CN209147486 U CN 209147486U
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China
Prior art keywords
evaporator
temperature
refrigeration system
refrigerant
auxiliary
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CN201821899579.XU
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Chinese (zh)
Inventor
黄玉优
孙妍
李欣
叶强蔚
赵成寅
陈桂福
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The utility model provides a kind of refrigeration system, and the refrigeration system includes: compressor, condenser, electric expansion valve and evaporator;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;Auxiliary evaporator, it is arranged on the refrigerant pipe road, so that the auxiliary evaporator and the evaporator series, 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 refrigerant in the refrigerant line in the auxiliary evaporator in the auxiliary evaporator.Extra refrigerating capacity can be discharged in time using concatenated auxiliary evaporator by the utility model, so that the refrigerating capacity into evaporator is quickly reduced, the temperature of the cooled medium after evaporator is promoted, without additional electric heater, refrigeration system stability is high.

Description

A kind of refrigeration system
Technical field
The utility model belongs to air-conditioning technical field, and in particular to a kind of refrigeration system.
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.
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 the utility model researching and designing goes out a kind of refrigeration system.
Utility model content
Therefore, the technical problem to be solved by the present invention is to overcome refrigeration system presence in the prior art can not be same Shi Shixian cooled medium fast and stable reaches target temperature and does not interfere with the stability of refrigeration system, and does not need to consume Take the defect of additional electric energy, to provide a kind of refrigeration system.
The utility model provides a kind of refrigeration system comprising:
Compressor, condenser, electric expansion valve and evaporator and refrigerant line;
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;
Auxiliary evaporator is arranged on the refrigerant pipe road, so that the auxiliary evaporator and the evaporator series, And the air side of the condensation fan is arranged in, so that the hot wind and process that the condensation fan is blown out in the auxiliary evaporator It exchanges heat between the refrigerant in refrigerant line in the auxiliary evaporator.
Preferably,
The evaporator on the refrigerant pipe road and being located at refrigerant flow direction is arranged in the auxiliary evaporator Upstream position.
Preferably,
The auxiliary evaporator includes air duct and the air-valve that is arranged at the tunnel inlet, and the air-valve can control institute It states air duct and opens and closes and adjust opening size.
Preferably,
Outlet end on the cooling medium pipeline positioned at the evaporator is provided with the first temperature sensor.
Preferably,
Input end on the refrigerant line positioned at the auxiliary evaporator is provided with second temperature sensor;Institute It states the outlet end on refrigerant line positioned at the evaporator and is provided with third 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 and third temperature sensor, the second temperature sensor and the third temperature sensor are temperature sensing package.
Preferably,
The auxiliary evaporator is finned tube exchanger, fin tube radiator or parallel-flow heat exchanger.
Preferably,
The cooled medium is water, so that water is passed through the cooling medium pipeline by cooled when the evaporator.
A kind of refrigeration system provided by the utility model has the following beneficial effects:
1. the utility model is by setting auxiliary evaporator and makes the auxiliary evaporator and the evaporator series, and The auxiliary evaporator be arranged in the condensation fan air side, so that the hot wind of condensation fan blowout with by institute It states and exchanges heat between the refrigerant in the refrigerant line in auxiliary evaporator, it can be by auxiliary evaporator to by wherein Refrigerant carry out heat effect, extra refrigerating capacity is discharged in time using concatenated auxiliary evaporator so that enter steaming The refrigerating capacity of hair device is quickly reduced, to promote the temperature of the cooled medium after evaporator;Make full use of safe wing The hot wind of piece pipework condensation device discharge carries out " heating " to auxiliary evaporator, the neutralization of extra refrigerating capacity is realized, due to not being related to making The control variation of cooling system load, therefore be conducive to the stabilization of refrigeration system, fast implement accurately water outlet temperature control target, reduce The fluctuation of leaving water temperature, without additional electric heater;The refrigeration for neutralizing evaporator is bypassed without using high-pressure hot gas Amount, refrigeration system stability are high.
2. the utility model can be situated between by the setting of the first temperature sensor and air-valve according to the freezing in evaporator The departure of matter outlet temperature and target temperature, so that being steamed from the hot wind part that air cooling fin pipework condensation device is produced by boasting by auxiliary Device is sent out, refrigerant is heated, so that the temperature of cooled medium increases, until leaving water temperature reaches control target, realization system The accurate and fast and stable of cooling system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the refrigeration system of the utility model.
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, Auxiliary evaporator;61, air duct;7, refrigerant line;8, air-valve;91, the first temperature sensor;92, second temperature sensor; 93, third temperature sensor.
Specific embodiment
As shown in Figure 1, the utility model provides a kind of refrigeration system comprising:
Compressor 1, condenser 2, electric expansion valve 3 and evaporator 4 and refrigerant line 7;
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;
Auxiliary evaporator 6 is arranged on refrigerant line 7, so that the auxiliary evaporator 6 is connected with the evaporator 4, And the air side of the condensation fan 21 is arranged in, so that the hot wind that the condensation fan 21 is blown out in the auxiliary evaporator 6 It exchanges heat between the refrigerant in the refrigerant line 7 in the process auxiliary evaporator 6.
The utility model is by setting auxiliary evaporator and makes the auxiliary evaporator and the evaporator series, and institute It states auxiliary evaporator and the air side of the condensation fan is set, so that described in the hot wind and process of condensation fan blowout It exchanges heat between the refrigerant in refrigerant line in auxiliary evaporator, it can be by auxiliary evaporator to therethrough Refrigerant carries out heat effect, and extra refrigerating capacity is discharged in time using concatenated auxiliary evaporator, so that entering evaporation The refrigerating capacity of device is quickly reduced, to promote the temperature of the cooled medium after evaporator;Make full use of safe fin The hot wind of pipework condensation device discharge carries out " heating " to auxiliary evaporator, the neutralization of extra refrigerating capacity is realized, due to not being related to freezing The control of system load changes, therefore is conducive to the stabilization of refrigeration system, fast implements accurately water outlet temperature control target, reduces out The fluctuation of coolant-temperature gage, without additional electric heater;The refrigerating capacity for neutralizing evaporator is bypassed without using high-pressure hot gas, Refrigeration system stability is high.
Preferably,
The evaporation on the refrigerant line 7 and being located at refrigerant flow direction is arranged in the auxiliary evaporator 6 The upstream position of device 4.This is the position that is preferably provided with of the auxiliary evaporator of the utility model, that is, is positioned in the upper of evaporator Trip section enables to refrigerant to be introduced into auxiliary evaporator and is evaporated heating, so that the refrigerating capacity in evaporator is adjusted, so that The refrigerant cooling capacity of part is neutralized when cooled medium temperature is lower, so that cooling capacity reduces, to promote cooled medium Temperature after flowing out evaporator, to realize the accurate and stable control to the temperature of cooled medium.
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 utility model can quickly reach mesh on this basis Temperature is marked, but by carrying out heating treatment speed faster to the chilled water of supercooling, and can be realized fast and stable control, substitution The energy saving of electrically heated heating treatment avoids the too low influence lathe of chilled water temperature, passes through refrigeration unit in conventional method Reach new stabilization process after various undulated controls again and need the long time, to reach new steady when chilled water temperature is excessively high Fixed control is also a prolonged stable control process, this is the shortcoming of conventional temperature control technique.
Preferably,
The auxiliary evaporator 6 includes air duct 61 and the air-valve 8 that 61 inlet of air duct is arranged in, 8 energy of air-valve It enough controls the air duct 61 and opens and closes and adjust opening size.Condensation fan can be received by setting air duct to blow Hot wind, and at tunnel inlet be arranged air-valve can to the wind of air duct import carry out control action, to control according to actual needs Whether cooled medium processed is heated by thermostat, realizes intelligent control, smaller to the stability influence of refrigeration system.
Auxiliary evaporator and evaporator are in series relationship, and auxiliary evaporator setting is swum on an evaporator;Meanwhile it is auxiliary Help evaporator that the hot air outlet of fin tube condenser is set.Auxiliary evaporator is flowed through in aperture control by controlling air-valve Hot air flow indirectly controls the refrigerating capacity in evaporator so as to control the refrigerating capacity size that auxiliary evaporator discharges in advance The degree of reduction, therefore the leaving water temperature of evaporator can be precisely controlled.
Preferably,
Input end on the cooling medium pipeline 5 positioned at the evaporator 4 is provided with the first temperature sensor 91.It is logical Cross the temperature after the outlet end of evaporator the first temperature sensor of setting can enter evaporator heat exchange to cooled medium Realize detection effect;It is compared by the refrigerant temperature (low temperature chilled water) of evaporator outlet with temperature control target, according to Heating amount required for departure calculates, and then air-valve is accurately controlled, so that the refrigerant in evaporator is accurately heated to Target temperature realizes the temperature control target of fast and stable.
The utility model, can be according to the refrigerant in evaporator by the setting of the first temperature sensor and air-valve The departure of outlet temperature and target temperature, so that passing through assisted evaporative from the hot wind part that air cooling fin pipework condensation device is produced by boasting Device heats refrigerant, so that the temperature of cooled medium increases, until leaving water temperature reaches control target, realization refrigeration The accurate and fast and stable of system.
Preferably, the input end on the refrigerant line 7 positioned at the auxiliary evaporator 6 is provided with second temperature biography Sensor 92;Outlet end on the refrigerant line 7 positioned at the evaporator 4 is provided with third temperature sensor 93.
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 first and second temperature sensors of the utility model Preferred constructive form.
Preferably,
The auxiliary evaporator 6 is finned tube exchanger, fin tube radiator or parallel-flow heat exchanger.This is that this is practical new The preferred constructive form of the auxiliary evaporator of type.
Preferably,
The cooled medium is water, so that water is cold when being passed through the cooling medium pipeline 5 by the evaporator 4 But.This is the preferred kind of the cooled medium of the utility model, can be controlled by water after reaching accurate temperature to precision Part cools down, and improves cooling effect.
Valve area is determined according to the deviation of leaving water temperature Ta and set temperature Ts, and (△ t is set Ts > Ta+ △ t for user Determine temperature-controlled precision, such as set and control precision as ± 0.5 DEG C, then △ t=0.5, remaining is similar) and Ts-Ta it is bigger, valve area It is bigger.
As shown in Figure 1, compressor, condenser (this programme is diagram with air cooling fin pipework condensation device), restricting element (we Case is by taking electric expansion valve as an example) and evaporator be sequentially connected with, refrigerant flow direction is identical as this sequence direction and forms basic refrigeration Circulation.
Auxiliary evaporator is placed in the air duct of both ends open, and air duct import is provided with the air-valve of adjustable aperture, air duct into The air-out direction of mouth face fin tube condenser.Controlled by the overbottom pressure of condensation fan and the aperture of air-valve flowed through in air duct it is auxiliary The hot air flow of evaporator is helped, and then influences the heat exchange amount of auxiliary evaporator.Auxiliary evaporator can be finned tube exchanger, Fin tube radiator, parallel-flow heat exchanger etc..
Temperature sensing package B (second temperature sensor is provided between the outlet of electric expansion valve and the import of auxiliary evaporator 92) temperature sensing package C (third temperature sensor 93), is provided between the outlet of evaporator and the air entry of compressor;On outlet pipe It is disposed with temperature sensing package A (the first temperature sensor 91), measures leaving water temperature Ta.Preferably, temperature sensing package D is provided on water inlet pipe (not shown) measures inflow temperature Ti.
The utility model also provides a kind of control method of refrigeration system, uses preceding described in any item refrigeration systems, Accurate control is realized to the temperature of cooled medium.By setting auxiliary evaporator and make the auxiliary evaporator and the steaming Device series connection is sent out, and the air side of the condensation fan is arranged in, so that the condensation fan was blown out in the auxiliary evaporator It exchanges heat between refrigerant in hot wind and the refrigerant line passed through in the auxiliary evaporator, assisted evaporative can be passed through Device carries out heat effect to refrigerant therethrough, and extra refrigerating capacity is released in time using concatenated auxiliary evaporator It goes, so that the refrigerating capacity into evaporator is quickly reduced, to promote the temperature of the cooled medium after evaporator;Sufficiently " heating " is carried out to auxiliary evaporator using the hot wind that the fin tube condenser of safety discharges, realizes the neutralization of extra refrigerating capacity, Control due to not being related to refrigeration system load changes, and is conducive to the stabilization of refrigeration system, fast implements and be accurately discharged Temperature control target reduces the fluctuation of leaving water temperature, without additional electric heater;It bypasses and neutralizes without using high-pressure hot gas The refrigerating capacity of evaporator, refrigeration system stability are high.
Preferably,
When including the first temperature sensor 91, the evaporator 4 is detected by first temperature sensor 91 Cooled medium 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 Ta reaches Ta≤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 according to cooling medium inlet temperature of the utility model, can So that by evaporator by cooled medium cooling down to the error range of target temperature Ts hereinafter, enabling to so cold But the temperature of medium is down to the error range of target temperature range hereinafter, in order to further heat up so that its water temperature reaches mesh Within the error range for marking temperature.
Preferably,
As Ts- △ t- △ t1≤Ta≤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 utility model according to cooled medium Specific control mode when outlet temperature is in the error range of target temperature, Ts- △ t- △ t1≤Tb≤Ts+ △ t illustrate quilt The inlet temperature of cooling medium has reached in the error range of target set temperature, at this moment only needs to maintain compressor, electronics swollen The current state of swollen valve and condensation fan just can maintain the temperature of cooled medium in target temperature range, required for satisfaction It asks.It is preferred that △ t=0.5 DEG C, △ t1=0.5 DEG C.
Preferably,
When including air-valve 8:
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;
Judge whether the cooling medium outlet temperature Ta meets-△ t≤Ts-Ta≤△ t, such as meets, then maintain existing Valve area;
As Ta > Ts, according to the difference of Ta-Ts, reduce the aperture of air-valve, difference is bigger, and aperture decreasing value is bigger;
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 controlled according to cooling medium outlet temperature of the utility model, i.e.-△ t When≤Ts-Ta≤△ t illustrates that outlet temperature is in target set temperature error range, then keep valve area constant, to medium It carries out continuing for heating under the state;Ts-Ta > △ t illustrates that medium outlet temperature is too low, needs to carry out medium at this time The mode for increasing heating capacity is controlled, therefore increases the aperture of air-valve at this time, to increase the heating capacity to medium, valve area Size and the temperature difference (Ts-Ta) size it is proportional, can promote to prestissimo the temperature of medium;Ta > Ts illustrates saliva out Temperature drift answers the aperture appropriate for reducing air-valve, reduces medium temperature slightly to increase refrigerating capacity;Ts-Ta <-△ T illustrates that medium outlet temperature is excessively high, and the mode for needing to carry out medium stopping heating at this time then freezing controls, The air-valve is closed at this time, and adjusts that the compressor frequency increases, the aperture of the electric expansion valve increases and described cold At least one of revolving speed increase of solidifying blower, so as to be effectively reduced the temperature of medium, to reach target temperature In range, satisfy the use demand.
Specifically, as follows to the main rate-determining steps of the valve area of auxiliary evaporator:
1) when booting operation, according to set temperature Ts, compressor frequency and/or electronic expansion valve opening and/or cold are adjusted Solidifying rotation speed of fan, (is generallyd use the operating parameter under memory state and carries out starting operation, had under memory state with most fast speed The optimum operation combination parameter of unit) make Ta≤Ts+ △ t (△ t be user set temperature-controlled precision, such as set control precision as ± 0.5 DEG C, then △ t=0.5, remaining is similar);
2) as Ts- △ t-0.5≤Ta≤Ts+ △ t, the operating status of above-mentioned load is maintained, with this condition to air-valve It is controlled;
A) as Ta < Ts- △ t, according to the difference of Ts-Ta, increase the aperture of air-valve, difference is bigger, and aperture value added is got over Greatly, until air-valve opens the output to the maximum load reduction refrigerating capacity for being then transferred to adjusting refrigeration system;
B) judge whether outlet temperature-△ t≤Ts-Ta≤△ t is true.If so, then maintaining existing valve area;
C) as Ta > Ts, according to the difference of Ta-Ts, reducing the aperture of air-valve, difference is bigger, and aperture decreasing value is bigger, Until air-valve closes the output for being then transferred to the load for adjusting refrigeration system and increasing refrigerating capacity;
D) when whenever there is Ta > Ts+ △ t, stop the adjusting of valve area, switch to the load to refrigeration system Be adjusted control increase refrigerating capacity output, until meet again it is above-mentioned 1).
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.The above is only the preferred embodiment of the utility model, it is noted that for the art For those of ordinary skill, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, These improvements and modifications also should be regarded as the protection scope of the utility model.

Claims (8)

1. a kind of refrigeration system, it is characterised in that: include:
Compressor (1), condenser (2), electric expansion valve (3) and evaporator (4) and refrigerant line (7) and condensation fan (21);
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);
Auxiliary evaporator (6) is arranged on the refrigerant line (7), so that the auxiliary evaporator (6) and the evaporator (4) it connects, and the auxiliary evaporator (6) is arranged in the air side of the condensation fan (21), so that the condensation fan (21) it exchanges heat between the refrigerant in the hot wind blown out and the refrigerant line (7) passed through in the auxiliary evaporator (6).
2. refrigeration system according to claim 1, it is characterised in that:
The auxiliary evaporator (6) is arranged on the refrigerant line (7) and is located at the evaporation of refrigerant flow direction The upstream position of device (4).
3. refrigeration system according to claim 1 or 2, it is characterised in that:
The auxiliary evaporator (6) includes the air-valve (8) of air duct (61) and setting in the air duct (61) inlet, the air-valve (8) air duct (61) can be controlled and open and close and adjust opening size.
4. refrigeration system according to claim 1, it is characterised in that:
Outlet end on the cooling medium pipeline (5) positioned at the evaporator (4) is provided with the first temperature sensor (91).
5. refrigeration system according to claim 1, it is characterised in that:
Input end on the refrigerant line (7) positioned at the auxiliary evaporator (6) is provided with second temperature sensor (92);Outlet end on the refrigerant line (7) positioned at the evaporator (4) is provided with third temperature sensor (93).
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) and third temperature sensor (93), the second temperature sensor (92) and the third temperature sensor It (93) is temperature sensing package.
7. refrigeration system described in any one of -2 according to claim 1, it is characterised in that:
The auxiliary evaporator (6) is finned tube exchanger, fin tube radiator or parallel-flow heat exchanger.
8. refrigeration system described in any one of -2 according to claim 1, it is characterised in that:
The cooled medium is water, so that water is passed through the cooling medium pipeline (5) and passes through the evaporator (4) Shi Beileng But.
CN201821899579.XU 2018-11-16 2018-11-16 A kind of refrigeration system Active CN209147486U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821899579.XU CN209147486U (en) 2018-11-16 2018-11-16 A kind of refrigeration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821899579.XU CN209147486U (en) 2018-11-16 2018-11-16 A kind of refrigeration system

Publications (1)

Publication Number Publication Date
CN209147486U true CN209147486U (en) 2019-07-23

Family

ID=67286222

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821899579.XU Active CN209147486U (en) 2018-11-16 2018-11-16 A kind of refrigeration system

Country Status (1)

Country Link
CN (1) CN209147486U (en)

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