CN102384551B - External-ice-melting-type ice cold storage refrigerating system and refrigerating method thereof - Google Patents

External-ice-melting-type ice cold storage refrigerating system and refrigerating method thereof Download PDF

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Publication number
CN102384551B
CN102384551B CN201110316280.3A CN201110316280A CN102384551B CN 102384551 B CN102384551 B CN 102384551B CN 201110316280 A CN201110316280 A CN 201110316280A CN 102384551 B CN102384551 B CN 102384551B
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pipeline
ice
chilled water
heat
water pump
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CN102384551A (en
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周必安
陈世坤
陈振乾
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Jiangsu colorful building environment Co., Ltd.
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JIANGSU QICAI TECHNOLOGY Co Ltd
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Abstract

The invention discloses an external-ice-melting-type ice cold storage refrigerating system and a refrigerating method thereof, and relates to the technical field of refrigerating air conditioners. The system comprises a refrigerating unit, a tail end device, an ice-making unit, a heat exchanging device and an ice storage groove, wherein the ice storage groove is internally provided with a heat exchanger; an evaporator of the ice-making unit is connected with the heat exchanger of the ice storage groove through a pipeline loop; the ice storage groove is connected with a cold fluid channel of the heat exchanging device through the pipeline loop; a hot fluid channel in the heat exchanging device is connected with the loop of the tail end device through a pipeline; the loop between a condenser of the ice-making unit and the evaporator of the refrigerating unit is provided with the pipeline, and the pipeline is provided with a circulation pump and a control valve correspondingly; and the cooling water of the condenser of the ice-making unit is pre-cooled to 2-20 DEC C for supplying by the refrigerating unit. According to the invention, the problems that a normal refrigerating unit can not operate under the ice-making working condition, and an air cooled ice-making unit has great compression ratio, high cost, and is complex to control and the like are solved, the cost of the refrigerating system can be lowered, and the ice-making efficiency and operation stability are improved.

Description

External ice-melting type ice cold-storage refrigerating system and refrigerating method thereof
Technical field
The present invention relates to refrigeration technology field, particularly refrigeration and air-conditioning technical field.
Background technology
Conventional refrigeration system is generally comprised of refrigeration plant, cold source device, end equipment, auxiliary equipment, connecting line and control system etc.Most widely used refrigeration plant is vapor compression refrigerator group, by evaporimeter, compressor, condenser, throttling arrangement, by copper pipe, connects into loop, charging refrigerant in loop.During refrigeration unit work, cold-producing medium loops evaporation, compression, condensation, throttling Four processes in evaporimeter, compressor, condenser, throttling arrangement, and heat is transferred to condenser from evaporimeter.
In typical refrigeration system, refrigeration unit is water-cooled cold water cooling unit---take water as media discharge heat and the refrigeration unit of carrying cold; Cold source device is cooling tower; End equipment is fan coil or air-treatment unit.
The evaporimeter of refrigeration unit and end equipment form chilled water closed circuit by pipeline and water pump.Chilled water is transported in evaporimeter by water pump, cooled dose absorbs heat and is cooled to 7 ℃ of left and right, the heat that is transported to end equipment absorption room air by pipeline is to reduce indoor air temperature, chilled water rises to 12 ℃ of left and right because absorbing room air heat temperature, then by pipeline and water pump Returning evaporimeter.
The condenser of refrigeration unit and cooling tower form cooling water circulation loop by pipeline and water pump.Cooling water is transported in condenser by water pump, and the heat of absorption refrigeration agent and be heated to 37 ℃ of left and right is transported in cooling tower by pipeline, is cooled to 32 ℃ of left and right, then returns in condenser by pipeline and water pump by cooling tower to outdoor air heat radiation.
Except by the mode of cooling tower, also have by the water-cooled cold water cooling unit of the mode discharges heat of underground pipe, underground water, surface water, these water-cooled cold water cooling units are also referred to as earth source heat pump unit, water source heat pump units.
Except take water as media discharge heat, the refrigeration unit that the air of take is in addition media discharge heat, this refrigeration unit is called wind-cooled cold-water unit or net for air-source heat pump units.
Above refrigeration unit is in when refrigeration, and the leaving water temperature of chilled water is generally 7 ℃ of left and right, but also can be 18 ℃ of left and right; In any case, because its temperature is all far above 0 ℃, can not ice making, therefore be called conventional refrigeration unit.
The shortcoming of the conventional refrigeration system forming with conventional refrigeration unit is:
1, for ensureing the cooling load of air-condition cooling of peak period, the capacity of refrigeration unit must meet peak value refrigeration duty, causes installed capacity excessive, has increased the initial cost of equipment; And the system most of the time is all moved under sub-load, also reduced operational efficiency and the utilization rate of equipment;
2, be not suitable for the part period and need the Air-conditioning Engineering of standby refrigerating capacity;
3, be not suitable for providing low-temperature cold water maybe to need to adopt the Air-conditioning Engineering of cold air distribution;
4, be not suitable for the Air-conditioning Engineering that power capacity or supply of electric power are restricted;
5, cooling load of air-condition peak overlaps with electrical network peak period, has aggravated the tensity of mains supply.
Existing ice cold-storage Refrigeration Technique, utilizes the phase-change characteristic of ice and water, and the period low at network load, electricity price is cheap, electricity consumption made refrigerating device refrigeration as night, and by the mode of ice making, it is that main form stores in ice that cold be take to latent heat of phase change; And the period high at network load, electricity price is expensive as daytime, the mode by ice-melt discharges the cold storing in ice, to meet cold demand for air conditioning or production technology.
Existing ice regenerative cooling system is comprised of refrigeration plant, ice-storage equipment, refrigerating medium, refrigerating medium-chilled water heat exchanger, cold source device, end equipment, auxiliary equipment, connecting line and control system etc., can realize ice-reserving, ice-reserving cooling, the independent cooling of refrigeration plant, the independent cooling of ice storage unit, ice storage unit and five kinds of operational modes of refrigeration plant air conditioning simultaneously.
The refrigeration plant of existing ice regenerative cooling system is generally double duty chiller unit.
Identical with conventional refrigeration unit, double duty chiller unit is also vapor compression refrigerator group, comprises the air-cooled unit of the water chiller of the mode discharges heat by cooling tower, underground pipe, underground water, surface water and the mode discharges heat by air.
Different from conventional refrigeration unit, the operating condition of double duty chiller unit has two kinds, i.e. cooling condition and ice making operating mode.While moving under cooling condition, the refrigerating medium outlet temperature of double duty chiller unit is the same with conventional refrigeration unit is 7 ℃ of left and right; And while moving under ice making operating mode, the refrigerating medium outlet temperature of double duty chiller unit is-5 ℃~-15 ℃.
The shortcoming of double duty chiller unit is:
When 1, double duty chiller unit moves under ice making operating mode, its refrigerating medium outlet temperature reduces by 12 ℃~22 ℃ than the chilled water leaving water temperature of conventional refrigeration unit, also 12 ℃~22 ℃ of the corresponding reductions of its evaporating temperature.So that no matter in which way discharges heat, in the situation that condensation temperature is identical, the compression ratio of the compressor of double duty chiller unit is large more than conventional refrigeration unit all.Under the mode with modal cooling tower discharges heat, the leaving water temperature of the cooling water of refrigeration unit is about 37 ℃, and corresponding condensation temperature is about 42 ℃; The evaporating temperature of double duty chiller unit under ice making operating mode is-10 ℃~-20 ℃, and the compression ratio of its compressor is 4.5~6.6; And the evaporating temperature of conventional refrigeration unit is about 2 ℃, the compression ratio of compressor is only 3.0 left and right.And compression ratio is larger, Energy Efficiency Ratio is lower.Thereby in refrigeration, can reach the double duty chiller unit of high energy efficiency ratio under two kinds of operating modes of ice making, specification requirement is high, technological requirement is high, and cost is expensive;
2, double duty chiller unit need to freeze, the alternate run of two kinds of operating modes of ice making, even need to freeze, the time operation of two kinds of operating modes of ice making, every kind of requirement that operating mode has different cooling temperatures and supplies cold, makes refrigeration unit be difficult to reach operation under all operating modes and all keeps higher operational efficiency and operation stability.Meanwhile, the control system of double duty chiller unit is also very complicated, has further increased cost, and has increased fault rate.
When 3, double duty chiller unit moves under ice making operating mode, evaporating temperature reduces by 12 ℃~22 ℃ than conventional refrigeration unit.And 1 ℃ of the every reduction of evaporating temperature, refrigerating capacity can reduce 2%~3%.Refrigerating capacity when therefore, double duty chiller unit moves under ice making operating mode can reduce 24%~66%.
Therefore, adopt the ice regenerative cooling system of double duty chiller unit, system cost is high, while particularly existing conventional refrigeration system being carried out to the transformation of ice cold-storage, need replace existing conventional refrigeration unit with expensive double duty chiller unit.And conventional refrigeration unit existing, that can normally work goes out of use, and causes serious waste.In addition, also exist system pipeline complexity, system to control complicated problem.
Summary of the invention
The object of the invention is to design a kind of reduction refrigeration system cost, improves the ice regenerative cooling system of ice making efficiency and operation stability.
The end equipment that the present invention includes refrigeration unit, is communicated with the evaporimeter of refrigeration unit by the first pipeline loop, also comprise ice making unit, heat-exchanger rig, Ice Storage Tank, heat exchanger is set in Ice Storage Tank, the evaporimeter of described ice making unit is connected by second pipe loop with the heat exchanger in Ice Storage Tank, and described Ice Storage Tank is connected by the 3rd pipeline loop with the cold fluid pass of heat-exchanger rig; Zone of heat liberation in described heat-exchanger rig is connected with end equipment loop by the 4th pipeline; Circulating pump and control valve are set respectively on pipeline described in each; It is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 5th pipeline, on described the 5th pipeline, corresponding circulating pump and control valve are set, described ice making unit is an ice making unit with a kind of operating mode work of ice making.
The present invention has overcome the problems such as conventional refrigeration unit can not be worked under ice making operating mode, air colling ice maker group compression ratio is large, cost is high, control is complicated, can reduce refrigeration system cost, improves ice making efficiency and operation stability.
The concrete technical scheme of the present invention can be: the evaporimeter of the first chilled water pump, refrigeration unit is connected by the first pipeline successively loop with end equipment; On the first pipeline between device and the first chilled water pump, side connects the 4th pipeline endways, other being connected on the first pipeline between described end equipment and the evaporimeter of described refrigeration unit of the other end of described the 4th pipeline is connected in series the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described the 4th pipeline; The cold fluid pass of described heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected by the mutual loop of the 3rd pipeline; The evaporimeter of described heat exchanger, coolant pump and ice making unit is connected by the mutual loop of second pipe; Other the 5th pipeline that connects on the pipeline connecting at the evaporator outlet of described refrigeration unit, other being connected on the pipeline being connected with described the first chilled water pump import of the other end of described the 5th pipeline, the condenser and the first valve that on described the 5th pipeline, are connected in series ice making unit arrange the second valve on the first pipeline between described the 5th pipeline and described end equipment.
The function of the double duty chiller unit of prior art is cut apart in the present invention, by conventional refrigeration unit and two groups of refrigeration unit of ice making unit, is carried out various combinations and is realized.Under ice making operating mode, by two groups of refrigeration unit associated working, carry out ice making---the chilled water the supply system ice maker group that conventional refrigeration unit is produced to be to make its cooling water, and ice making unit be take the refrigerating medium ice making that conventional refrigeration unit is produced as cold source device; And the compression ratio of every group of refrigeration unit is all much smaller than existing double duty chiller unit.Under cooling condition, by conventional refrigeration unit, work independently and freeze.The present invention has reduced the cost of ice regenerative cooling system, particularly when existing conventional refrigeration system being carried out to the transformation of ice cold-storage, can utilize existing conventional refrigeration unit, avoids waste.Meanwhile, also simplify pipeline and the control of ice regenerative cooling system, improved the efficiency of ice regenerative cooling system.
The 3rd chilled water pump of the present invention can be the variable-flow chilled water pump of the modes such as frequency conversion, can regulate easily the flow of the refrigerating medium of the cold fluid pass that enters heat-exchanger rig, improve heat exchanger effectiveness, control the supply water temperature of the zone of heat liberation of heat-exchanger rig, demand refrigeration duty being changed to meet end equipment.
The present invention also can connect the 6th pipeline between the 3rd pipeline at the cold fluid pass two ends of described connection heat-exchanger rig, on described the 6th pipeline, be connected in series the 3rd valve, on the 3rd pipeline between the cold fluid pass of described the 6th pipeline and described heat-exchanger rig, be connected in series the 4th valve.The flow of the refrigerating medium by the same adjustable cold fluid pass that enters heat-exchanger rig of third and fourth valve, improves heat exchanger effectiveness, controls the supply water temperature of the zone of heat liberation of heat-exchanger rig, demand refrigeration duty being changed to meet end equipment.
The present invention also can connect the 6th pipeline between the 3rd pipeline at the cold fluid pass two ends of described connection heat-exchanger rig, at described the 6th pipeline, is connected in series a three-way valve with the mouth that crosses of the 3rd pipeline.By three-way valve, also can regulate the flow of the refrigerating medium of the cold fluid pass that enters heat-exchanger rig, improve heat exchanger effectiveness, control the supply water temperature of the zone of heat liberation of heat-exchanger rig, demand refrigeration duty being changed to meet end equipment.
The present invention also can connect the 6th pipeline between the 3rd pipeline at described connection Ice Storage Tank two ends, on described the 6th pipeline, is connected in series the 3rd valve, and is connected in series the 4th valve on the 3rd pipeline between described the 6th pipeline and described Ice Storage Tank.By third and fourth valve regulated, enter the flow of refrigerating medium of the cold fluid pass of heat-exchanger rig, improve heat exchanger effectiveness, control the supply water temperature of the zone of heat liberation of heat-exchanger rig, meet the demand that end equipment changes refrigeration duty.
In like manner, the present invention also can connect the 6th pipeline between the 3rd pipeline at described connection Ice Storage Tank two ends, at described the 6th pipeline and the 3rd pipeline mouth that crosses, is connected in series a three-way valve.The flow of the refrigerating medium by the adjustable cold fluid pass that enters heat-exchanger rig of three-way valve, improves heat exchanger effectiveness, controls the supply water temperature of the zone of heat liberation of heat-exchanger rig, meets the demand that end equipment changes refrigeration duty.
Another object of the present invention is to propose the method that the above ice regenerative cooling system of employing freezes:
The cooling water of the condenser of ice making unit is supplied with after being chilled in advance 2~20 ℃ by refrigeration unit.
The invention has the beneficial effects as follows:
One, improve ice making efficiency, reduce the cost of ice making unit
Ice making unit of the present invention adopt conventional refrigeration unit the chilled water of 2~20 ℃ of confession as its cooling water, its corresponding condensation temperature is 12~30 ℃, than the condensation temperature of existing double duty chiller unit (42 ℃), decline 12~30 ℃, make the corresponding decline of condensing pressure of ice making unit, the compression ratio of result ice making unit is compared existing double duty chiller unit and has been declined 25.96%~55.10%, thereby the Energy Efficiency Ratio that has greatly improved ice making unit is operational efficiency; Meanwhile, also greatly reduce specification requirement and the technological requirement of ice making unit, make ice machine form this and greatly reduce.
Two, improve the operation stability of ice making unit, simplify the control of ice making unit
Ice making unit of the present invention is only with a kind of operating mode work of ice making, and it is constant that its evaporating temperature and delivery temperature all keep, and without frequent adjusting, greatly improved the operation stability of ice making unit.Meanwhile, the control of ice making unit is simplified greatly, has further reduced cost and the fault rate of ice making unit.
Three, improve the refrigerating capacity of ice making unit, reduce the installed capacity of ice making unit in ice regenerative cooling system
As everyone knows, 1 ℃ of the every reduction of the condensation temperature of refrigeration unit, its refrigerating capacity can improve 1.5%.The condensation temperature of ice making unit of the present invention is 12~30 ℃, than the condensation temperature of existing double duty chiller unit (42 ℃), declines 12~30 ℃, and the refrigerating capacity of ice making unit can improve 18%~45%; Accordingly, also significantly reduced the installed capacity of ice making unit in ice regenerative cooling system.
Four, reduce the cost of ice regenerative cooling system
Refrigeration unit of the present invention, no matter ice making unit or conventional refrigeration unit, cost is all significantly less than existing double duty chiller unit.In the situation that total refrigeration duty is identical, the totle drilling cost of two groups of refrigeration unit of the present invention still obviously reduces than the cost of double duty chiller unit, thereby has reduced the cost of ice regenerative cooling system.
Five, the composition of ice regenerative cooling system and operation are more flexible
Ice regenerative cooling system of the present invention is comprised of ice making unit and conventional refrigeration unit, and refrigeration duty is by ice making unit and conventional refrigeration unit shared.The ratio that the present invention can be freely, assignment system ice maker group and conventional refrigeration unit are shared refrigeration duty separately to be neatly to adapt to the refrigeration duty of various different situations, greatly improved flexibility that ice regenerative cooling system forms and the flexibility of operation.
Six, simplify pipeline and the control of ice regenerative cooling system
Ice regenerative cooling system of the present invention is divided into ice making, refrigeration two parts, and conventional refrigeration unit is only with a kind of operating mode work of freezing, and ice making unit is only with a kind of operating mode work of ice making, thus the simplification pipeline of system and the control of system.
Seven, reduce the cost that existing conventional refrigeration system is carried out to the transformation of ice cold-storage
The refrigerating capacity of the conventional refrigeration unit of conventional refrigeration system is based on meeting a day peak load configuration, and the refrigeration duty at night more than day peak load low, therefore the refrigerating capacity at conventional refrigeration unit night is much larger than the refrigeration duty at night.When existing conventional refrigeration system being carried out to the transformation of ice cold-storage, only need the ice making unit that allocating power is very little, can implement technical scheme of the present invention, can meet the refrigeration duty of ice making, take full advantage of again conventional refrigeration unit refrigerating capacity more than needed at night; Without conventional refrigeration unit existing, that can normally work being discarded and adding more expensive double duty chiller unit, greatly reduced the cost that existing conventional refrigeration system is carried out to the transformation of ice cold-storage.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the second structural representation of the present invention.
Fig. 3 is the third structural representation of the present invention.
Fig. 4 is the 4th kind of structural representation of the present invention.
Fig. 5 is the 5th kind of structural representation of the present invention.
The specific embodiment
One, embodiment mono-:
As shown in Figure 1, the evaporimeter 1-2 that the present invention includes refrigeration unit 1, end equipment 3, the first chilled water pump 2, the first chilled water pumps 2, refrigeration unit 1 is connected by the first pipeline 4 successively loop with end equipment 3.
Install endways other the 4th pipeline 5 that connects on the first pipeline 4 between the 3 and first chilled water pump 2, other being connected on the first pipeline 4 between end equipment 3 and the evaporimeter 1-2 of refrigeration unit 1 of the other end of the 4th pipeline 5 is connected in series the zone of heat liberation 7-1 of the second chilled water pump 6 and heat-exchanger rig 7 on the 4th pipeline 5.
The cold fluid pass 7-2 of heat-exchanger rig 7, (frequency conversion type) the 3rd chilled water pump 8 and Ice Storage Tank 9 are connected by the 3rd pipeline 10 loops.
The evaporimeter 13-1 of the heat exchanger 11 in Ice Storage Tank 9, coolant pump 12 and ice making unit 13 is connected by second pipe 14 loops.
Other the 5th pipeline 15 that connects on the pipeline connecting in the evaporimeter 1-2 of refrigeration unit 1 outlet, other being connected on the pipeline being connected with the first chilled water pump 2 imports of the other end of the 5th pipeline 15 is connected in series condenser 13-2 and first valve 17 of ice making unit 13 on the 5th pipeline 15.
On the first pipeline 4 between the 5th pipeline 15 and end equipment 3, be connected the second valve 16.
By above connection, form:
1, a chilled water circuit: Ice Storage Tank 9, the 3rd chilled water pump 8, heat-exchanger rig 7 are connected into a loop by a chilled water tube connector;
2, secondary chilled water circuit: by secondary chilled water tube connector by the first chilled water pump 2, the second chilled water pump 6, the evaporimeter 1-2 of refrigeration unit 1, the condenser 13-2 of ice making unit 13, the first valve 17, the second valve 16, end equipment 3(as: fan coil) connect into loop;
3, refrigerating medium loop: the evaporimeter 13-1 of coolant pump 12, ice making unit 13, Ice Storage Tank 9 inner coil pipe heat exchangers 11 are connected into a loop by refrigerating medium tube connector.
The present invention can realize plurality of operating modes:
1, ice-storage mode:
The second valve 16 is closed, and the 3rd chilled water pump 8, the second chilled water pump 6 are out of service.
The first valve 17 is opened, the first chilled water pump 2, coolant pump 12 operations, refrigeration unit 1, the 13 start operations of ice making unit.
The cooling water of the condenser 13-2 of ice making unit 13 is supplied with after being chilled in advance 2~20 ℃ by refrigeration unit 1.
Chilled water circuit: chilled water, through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, absorbs after cold, flows into the condenser 13-2 of ice making unit 13, after released cold quantity, then returns to the first chilled water pump 2 through the first valve 17, enters next circulation.
Refrigerating medium loop: refrigerating medium, through the evaporimeter 13-1 of coolant pump 12 input ice making units 13, absorbs after cold, flows into the heat exchanger 11 in Ice Storage Tank 9, after released cold quantity ice making, returns to coolant pump 12, enters next circulation.
2, ice-reserving while cooling pattern:
The first valve 17, the second valve 16 are opened; The first chilled water pump 2, coolant pump 12 operations; Refrigeration unit 1, the 13 start operations of ice making unit.
The 3rd chilled water pump 8, the second chilled water pump 6 are out of service.
The cooling water of the condenser 13-2 of ice making unit 13 is supplied with after being chilled in advance 2~20 ℃ by refrigeration unit 1.
Chilled water circuit: chilled water, through the evaporimeter 1-2 of the first chilled water pump 2 input refrigeration unit 1, absorbs after cold, and the condenser 13-2 that a part flows into ice making unit 13, after released cold quantity, then returns to the first chilled water pump 2 through the first valve 17, enters next circulation; Another part flows into end equipment 3 coolings, after released cold quantity, then returns to the first chilled water pump 2 by the second valve 16, enters next circulation.
Refrigerating medium loop: refrigerating medium, through the evaporimeter 13-1 of coolant pump 12 input ice making units 13, absorbs after cold, flows into the heat exchanger 11 in Ice Storage Tank 9, after released cold quantity ice making, returns to coolant pump 12, enters next circulation.
3, the independent cooling pattern of conventional unit:
The second valve 16 is opened; The first chilled water pump 2 operations; Refrigeration unit 1 start operation;
The first valve 17 is closed; (frequency conversion) the 3rd chilled water pump 8, the second chilled water pump 6, coolant pump 12 are out of service; Ice making unit 13 is shut down.
Chilled water, through the first chilled water pump 2 input refrigeration unit 1 evaporimeter 1-2, absorbs after cold, flows into end equipment 3 coolings, after released cold quantity, then by 16 times the first chilled water pumps 2 of the second valve, enters next circulation.
4, the independent cooling pattern of Ice Storage Tank:
The second valve 16 is opened; (frequency conversion) the 3rd chilled water pump 8, the second chilled water pump 6 operations;
The first valve 17 is closed; The first chilled water pump 2, coolant pump 12 are out of service; Refrigeration unit 1, ice making unit 13 are shut down.
A chilled water circuit a: chilled water, after the cold fluid pass 7-2 released cold quantity of the 3rd chilled water pump 8 input heat-exchanger rigs 7, flows into Ice Storage Tank 9, absorbs after cold, returns to the 3rd chilled water pump 8, enters next circulation.
The 3rd chilled water pump 8(frequency conversion) regulating frequency, regulates a chilled-water flow of the cold fluid pass 7-2 enter heat-exchanger rig 7, to regulate the temperature of the secondary chilled water in the zone of heat liberation 7-1 of heat-exchanger rig 7.
Secondary chilled water circuit: secondary chilled water absorbs after cold through the zone of heat liberation 7-1 of the second chilled water pump 6 input heat-exchanger rigs 7, flows into end equipment 3 coolings, after released cold quantity, then through the second valve 16, returns to the second chilled water pump 6, enters next circulation.
5, Ice Storage Tank and conventional unit air conditioning pattern:
The second valve 16 is opened, (frequency conversion) the 3rd chilled water pump 8, the first chilled water pump 2, the second chilled water pump 6 operations; Refrigeration unit 1 start operation.
The first valve 17 is closed, and coolant pump 12 is out of service, and ice making unit 13 is shut down.
A chilled water circuit a: chilled water, after the cold fluid pass 7-2 released cold quantity of the 3rd chilled water pump 8 input heat-exchanger rigs 7, flows into Ice Storage Tank 9, absorbs after cold, returns to the 3rd chilled water pump 8, enters next circulation;
The 3rd chilled water pump 8 regulating frequencies, regulate a chilled-water flow of the cold fluid pass 7-2 enter heat-exchanger rig 7, to regulate the temperature of the secondary chilled water in the zone of heat liberation 7-1 of heat-exchanger rig 7.
Secondary chilled water circuit: a part of secondary chilled water absorbs after cold through the zone of heat liberation 7-1 of the second chilled water pump 6 input heat-exchanger rigs 7, flow into end equipment 3 coolings, after released cold quantity, then through the second valve 16, return to the second chilled water pump 6, enter next circulation; Another part secondary chilled water, through the first chilled water pump 2 input refrigeration unit 1 evaporimeter 1-2, absorbs after cold, flows into end equipment 3 coolings, after released cold quantity, then through the second valve 16, returns to the first chilled water pump 2, enters next circulation.
Two, embodiment bis-:
As shown in Figure 2, in this example, the 3rd chilled water pump 8 is common chilled water pump, other with embodiment mono-.
Separately, between the 3rd pipeline 10 at cold fluid pass 7-2 two ends that connects heat-exchanger rig 7, connect the 6th pipeline 19, on the 6th pipeline 19, be connected in series the 3rd valve 20, on the 3rd pipeline 10 between the cold fluid pass 7-2 of the 6th pipeline 19 and heat-exchanger rig 7, be connected in series the 4th valve 21.
By the 3rd valve 20, the 4th valve 21, regulate a chilled-water flow of the cold fluid pass 7-2 that enters heat-exchanger rig 7, to regulate the secondary chilled water temperature in the zone of heat liberation 7-1 of heat-exchanger rig 7.
Three, embodiment tri-:
As shown in Figure 3, in this example, the 3rd chilled water pump 8 is common chilled water pump, other with embodiment mono-.
Separately, between the 3rd pipeline 10 at cold fluid pass 7-2 two ends that connects heat-exchanger rig 7, connect the 6th pipeline 19, at the 6th pipeline 19, be connected in series a three-way valve 20 with the mouth that crosses of the 3rd pipeline 10.
By three-way valve 20, regulate a chilled-water flow of the cold fluid pass 7-2 that enters heat-exchanger rig 7, to regulate the secondary chilled water temperature in the zone of heat liberation 7-1 of heat-exchanger rig 7.
Four, embodiment tetra-:
As shown in Figure 4, in this example, the 3rd chilled water pump 8 is common chilled water pump, other with embodiment mono-.
Separately, connect the 6th pipeline 19 connecting between the 3rd pipeline 10 at Ice Storage Tank 9 two ends, on the 6th pipeline 19, be connected in series the 3rd valve 20, and be connected in series the 4th valve 21 on the 3rd pipeline 10 between the 6th pipeline 19 and Ice Storage Tank 9.
By the 3rd valve 20, the 4th valve 21, regulate a chilled water temperature of the cold fluid pass 7-2 that enters heat-exchanger rig 7, to regulate the secondary chilled water temperature in the zone of heat liberation 7-1 of heat-exchanger rig 7.
Five, embodiment five:
As shown in Figure 5, in this example, the 3rd chilled water pump 8 is common chilled water pump, other with embodiment mono-.
Separately, between the 3rd pipeline 10 that connects Ice Storage Tank 9 two ends, connect the 6th pipeline 19, at the 6th pipeline 19, be connected in series a three-way valve 20 with the mouth that crosses of the 3rd pipeline 10.
By three-way valve 20, regulate a chilled water temperature of the cold fluid pass 7-2 that enters heat-exchanger rig 7, to regulate the secondary chilled water temperature in the zone of heat liberation 7-1 of heat-exchanger rig 7.

Claims (6)

1. external ice-melting type ice cold-storage refrigerating system, comprise refrigeration unit, end equipment, ice making unit, heat-exchanger rig, Ice Storage Tank, heat exchanger is set in Ice Storage Tank, and the evaporimeter of the first chilled water pump, refrigeration unit is connected by the first pipeline successively loop with end equipment; The evaporimeter of described heat exchanger, coolant pump and ice making unit is connected by second pipe loop; The cold fluid pass of described heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected by the 3rd pipeline loop; It is characterized in that: other one end that connects the 4th pipeline on the first pipeline between described end equipment and the first chilled water pump, other being connected on the first pipeline between described end equipment and the evaporimeter of described refrigeration unit of the other end of described the 4th pipeline is connected in series the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described the 4th pipeline; Described ice making unit is an ice making unit with a kind of operating mode work of ice making; Other one end that connects the 5th pipeline on the first pipeline being connected with the evaporator outlet of described refrigeration unit, other being connected on the first pipeline being connected with described the first chilled water pump import of the other end of described the 5th pipeline, the condenser and the first valve that on described the 5th pipeline, are connected in series ice making unit arrange the second valve on the first pipeline between described the 5th pipeline and described end equipment; Described the 3rd chilled water pump is frequency conversion type variable-flow chilled water pump.
2. external ice-melting type ice cold-storage refrigerating system, comprise refrigeration unit, end equipment, ice making unit, heat-exchanger rig, Ice Storage Tank, heat exchanger is set in Ice Storage Tank, and the evaporimeter of the first chilled water pump, refrigeration unit is connected by the first pipeline successively loop with end equipment; The evaporimeter of described heat exchanger, coolant pump and ice making unit is connected by second pipe loop; The cold fluid pass of described heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected by the 3rd pipeline loop; It is characterized in that: other one end that connects the 4th pipeline on the first pipeline between described end equipment and the first chilled water pump, other being connected on the first pipeline between described end equipment and the evaporimeter of described refrigeration unit of the other end of described the 4th pipeline is connected in series the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described the 4th pipeline; Described ice making unit is an ice making unit with a kind of operating mode work of ice making; Other one end that connects the 5th pipeline on the first pipeline being connected with the evaporator outlet of described refrigeration unit, other being connected on the first pipeline being connected with described the first chilled water pump import of the other end of described the 5th pipeline, the condenser and the first valve that on described the 5th pipeline, are connected in series ice making unit arrange the second valve on the first pipeline between described the 5th pipeline and described end equipment; Between described the 3rd pipeline at cold fluid pass two ends that connects heat-exchanger rig, connect the 6th pipeline, on described the 6th pipeline, be connected in series the 3rd valve, on the 3rd pipeline between the cold fluid pass of described the 6th pipeline and described heat-exchanger rig, be connected in series the 4th valve, the 4th valve is between cold fluid pass and the 3rd chilled water pump.
3. external ice-melting type ice cold-storage refrigerating system, comprise refrigeration unit, end equipment, ice making unit, heat-exchanger rig, Ice Storage Tank, heat exchanger is set in Ice Storage Tank, and the evaporimeter of the first chilled water pump, refrigeration unit is connected by the first pipeline successively loop with end equipment; The evaporimeter of described heat exchanger, coolant pump and ice making unit is connected by second pipe loop; The cold fluid pass of described heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected by the 3rd pipeline loop; It is characterized in that: other one end that connects the 4th pipeline on the first pipeline between described end equipment and the first chilled water pump, other being connected on the first pipeline between described end equipment and the evaporimeter of described refrigeration unit of the other end of described the 4th pipeline is connected in series the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described the 4th pipeline; Described ice making unit is an ice making unit with a kind of operating mode work of ice making; Other one end that connects the 5th pipeline on the first pipeline being connected with the evaporator outlet of described refrigeration unit, other being connected on the first pipeline being connected with described the first chilled water pump import of the other end of described the 5th pipeline, the condenser and the first valve that on described the 5th pipeline, are connected in series ice making unit arrange the second valve on the first pipeline between described the 5th pipeline and described end equipment; Between described the 3rd pipeline at cold fluid pass two ends that connects heat-exchanger rig, connect the 6th pipeline, at described the 6th pipeline, be connected in series a three-way valve with the mouth that crosses of the 3rd pipeline, described three-way valve is between the cold fluid pass and the 3rd chilled water pump of heat-exchanger rig.
4. external ice-melting type ice cold-storage refrigerating system, comprise refrigeration unit, end equipment, ice making unit, heat-exchanger rig, Ice Storage Tank, heat exchanger is set in Ice Storage Tank, and the evaporimeter of the first chilled water pump, refrigeration unit is connected by the first pipeline successively loop with end equipment; The evaporimeter of described heat exchanger, coolant pump and ice making unit is connected by second pipe loop; The cold fluid pass of described heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected by the 3rd pipeline loop; It is characterized in that: other one end that connects the 4th pipeline on the first pipeline between described end equipment and the first chilled water pump, other being connected on the first pipeline between described end equipment and the evaporimeter of described refrigeration unit of the other end of described the 4th pipeline is connected in series the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described the 4th pipeline; Described ice making unit is an ice making unit with a kind of operating mode work of ice making; Other one end that connects the 5th pipeline on the first pipeline being connected with the evaporator outlet of described refrigeration unit, other being connected on the first pipeline being connected with described the first chilled water pump import of the other end of described the 5th pipeline, the condenser and the first valve that on described the 5th pipeline, are connected in series ice making unit arrange the second valve on the first pipeline between described the 5th pipeline and described end equipment; Between described the 3rd pipeline that connects Ice Storage Tank two ends, connect the 6th pipeline, on described the 6th pipeline, be connected in series the 3rd valve, and being connected in series the 4th valve on the 3rd pipeline between described the 6th pipeline and described Ice Storage Tank, described the 4th valve is between Ice Storage Tank and the 3rd chilled water pump.
5. external ice-melting type ice cold-storage refrigerating system, comprise refrigeration unit, end equipment, ice making unit, heat-exchanger rig, Ice Storage Tank, heat exchanger is set in Ice Storage Tank, and the evaporimeter of the first chilled water pump, refrigeration unit is connected by the first pipeline successively loop with end equipment; The evaporimeter of described heat exchanger, coolant pump and ice making unit is connected by second pipe loop; The cold fluid pass of described heat-exchanger rig, the 3rd chilled water pump and Ice Storage Tank are connected by the 3rd pipeline loop; It is characterized in that: other one end that connects the 4th pipeline on the first pipeline between described end equipment and the first chilled water pump, other being connected on the first pipeline between described end equipment and the evaporimeter of described refrigeration unit of the other end of described the 4th pipeline is connected in series the zone of heat liberation of the second chilled water pump and heat-exchanger rig on described the 4th pipeline; Described ice making unit is an ice making unit with a kind of operating mode work of ice making; Other one end that connects the 5th pipeline on the first pipeline being connected with the evaporator outlet of described refrigeration unit, other being connected on the first pipeline being connected with described the first chilled water pump import of the other end of described the 5th pipeline, the condenser and the first valve that on described the 5th pipeline, are connected in series ice making unit arrange the second valve on the first pipeline between described the 5th pipeline and described end equipment; Connect the 6th pipeline connecting between described the 3rd pipeline at Ice Storage Tank two ends, at described the 6th pipeline and the 3rd pipeline mouth that crosses, be connected in series a three-way valve, described three-way valve is between Ice Storage Tank and the 3rd chilled water pump.
6. the use method that external ice-melting type ice cold-storage refrigerating system freezes as described in claim 1 or 2 or 3 or 4 or 5, is characterized in that: after the cooling water of the condenser of ice making unit is chilled to 2~20 ℃ in advance by refrigeration unit, supply with.
CN201110316280.3A 2011-10-18 2011-10-18 External-ice-melting-type ice cold storage refrigerating system and refrigerating method thereof Expired - Fee Related CN102384551B (en)

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