CN102506473B - Direct-evaporating type ice cold accumulation refrigerating system and refrigerating method thereof - Google Patents
Direct-evaporating type ice cold accumulation refrigerating system and refrigerating method thereof Download PDFInfo
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- CN102506473B CN102506473B CN201110316232.4A CN201110316232A CN102506473B CN 102506473 B CN102506473 B CN 102506473B CN 201110316232 A CN201110316232 A CN 201110316232A CN 102506473 B CN102506473 B CN 102506473B
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Abstract
The invention provides a direct-evaporating type ice cold accumulation refrigerating system and a refrigerating method thereof, relating to the technical field of refrigerating air conditioners. The refrigerating system comprises a refrigerating unit, an end device, an ice making unit, a heat exchanging device and an ice accumulation tank, wherein an evaporator of the ice making unit is arranged in the ice accumulation tank, the ice accumulation tank is connected with a clod fluid channel of the heat exchanging device, a hot fluid channel of the heat exchanging device is connected with the end device, a pipeline is arranged on a loop between a condenser of the ice making unit and the evaporator of the refrigerating unit and a corresponding circulating pump and control valve are arranged on the pipeline. Cooling water of the condenser of the ice making unit is supplied after being precooled to 2-20 DEG C by the refrigerating unit. The problem that the conventional refrigerating unit cannot work on an ice making operation condition and the problem that an air-cooling ice maker has a large compression ratio, is high in cost and is complicated to control can be overcome, the cost of a refrigerating system can be reduced and ice making efficiency and operational stability can be improved.
Description
Technical field
The present invention relates to refrigeration technology field, particularly refrigeration and air-conditioning technical field.
Background technology
Conventional refrigeration system is generally made up 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, connects into loop by evaporimeter, compressor, condenser, throttling arrangement by copper pipe, charging refrigerant in loop.When 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 with 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 are by pipeline and water pump composition chilled water closed circuit.Chilled water is transported in evaporimeter by water pump, cooled dose absorbs heat and be 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 are by pipeline and water pump composition cooling water circulation loop.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, also have the refrigeration unit take air as 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 reduce operational efficiency and the utilization rate of equipment;
2, be not suitable for the part period and need the Air-conditioning Engineering of refrigerating capacity for subsequent use;
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, by the mode of ice making, cold is stored in ice take latent heat of phase change as main form; And the period high at network load, electricity price is expensive as daytime, by the mode of ice-melt, the cold storing in ice is discharged, to meet cold demand for air conditioning or production technology.
Existing ice regenerative cooling system is made up 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 operation 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:
1, when 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 discharges heat no matter in which way, in the situation that condensation temperature is identical, all large more than conventional refrigeration unit of the compression ratio of the compressor of double duty chiller unit.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, technical requirement is high, technological requirement is high, cost costliness;
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 operating mode has different cooling temperatures and the requirement for 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.
3,, when 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%.Therefore refrigerating capacity when, 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 there is the problem of system pipeline complexity, system control complexity.
Summary of the invention
The object of the invention is to design a kind of refrigeration system cost that reduces, and 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 by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, Ice Storage Tank, the evaporimeter of described ice making unit is arranged in Ice Storage Tank, and described Ice Storage Tank is connected by the second 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 3rd pipeline; Also comprise the circulating pump and the control valve that are arranged on each pipeline, it is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 4th pipeline, on described the 4th pipeline, corresponding circulating pump and control valve are set.
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.
Concrete technical scheme of the present invention is: evaporimeter, end equipment and first chilled water pump of refrigeration unit of the present invention are connected by the first pipeline successively loop; Other the 3rd pipeline that connects on the first pipeline between described end equipment and the first chilled water pump, on described the 3rd pipeline, be connected in series the zone of heat liberation of the second chilled water pump, heat-exchanger rig, 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 3rd pipeline; Cold fluid pass, the 3rd chilled water pump and the Ice Storage Tank of described heat-exchanger rig are connected by the mutual loop of second pipe; Other the 4th pipeline that connects on the pipeline being connected with 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 4th pipeline is connected in series condenser and first valve of ice making unit on described the 4th pipeline; On the first pipeline between described the 4th pipeline and described end equipment, the second valve is set.
The function of the double duty chiller unit of prior art is cut apart in the present invention, is carried out various combinations and is realized by conventional refrigeration unit and two groups of refrigeration unit of ice making unit.Under ice making operating mode, carry out ice making by two groups of refrigeration unit associated working---the chilled water the supply system ice maker group that conventional refrigeration unit is produced to be to make its cooling water, the refrigerating medium ice making that ice making unit is produced take conventional refrigeration unit 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, work independently and freeze by conventional refrigeration unit.The present invention has reduced the cost of ice regenerative cooling system, particularly in the time 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 in the present invention can adopt the variable-flow formula chilled water pump of the modes such as frequency conversion, be beneficial to the flow of the refrigerating medium that regulates 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, meet the demand that end equipment changes refrigeration duty.
The present invention also can connect the 5th pipeline between the second pipe at the cold fluid pass two ends of described connection heat-exchanger rig, on described the 5th pipeline, be connected in series the 3rd valve, on the second pipe between described the 5th pipeline and the cold fluid pass of described heat-exchanger rig, be connected in series the 4th valve.Enter the flow of the refrigerating medium of the cold fluid pass of heat-exchanger rig by the 3rd valve, the 4th valve regulated, 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 5th pipeline between the second pipe at the cold fluid pass two ends of described connection heat-exchanger rig, is connected in series a three-way valve at described the 5th pipeline with the mouth that crosses of second pipe.Regulate the flow of the refrigerating medium of the cold fluid pass that enters heat-exchanger rig by three-way valve, 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 otherly on the second pipe between described connection Ice Storage Tank two ends connect the 5th pipeline, on described the 5th pipeline, is connected in series the 3rd valve, is connected in series the 4th valve on the second pipe between described the 5th pipeline and described Ice Storage Tank.Enter the flow of the refrigerating medium of the cold fluid pass of heat-exchanger rig by the 3rd valve, the 4th valve regulated, 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.
The present invention also can connect the 5th pipeline between the second pipe of described connection Ice Storage Tank end, is connected in series a three-way valve at described the 5th pipeline with the mouth that crosses of second pipe.Regulate the flow of the refrigerating medium of the cold fluid pass that enters heat-exchanger rig by three-way valve, 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.
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 ℃, decline 12～30 ℃ than the condensation temperature of existing double duty chiller unit (42 ℃), 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 technical requirement and the technological requirement of ice making unit, this greatly reduces to make ice machine composition.
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 ℃, declines 12～30 ℃ than the condensation temperature of existing double duty chiller unit (42 ℃), 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 case of 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 made up 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 neatly, to adapt to the refrigeration duty of various different situations, has improved the flexibility of ice regenerative cooling system composition and the flexibility of operation greatly.
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.In the time 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 by discarded conventional refrigeration unit existing, that can normally work and add more expensive double duty chiller unit, greatly reduce 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 3rd pipeline 5 that connects on 3 and first the first pipelines 4 between chilled water pump 2, other being connected on the first pipeline 4 between end equipment 3 and refrigeration unit 1 of the other end of the 3rd pipeline 5 is connected in series the zone of heat liberation 7-1 of the second chilled water pump 6, heat-exchanger rig 7 on the 3rd pipeline 5.
Cold fluid pass 7-2, (variable-flow formula) the 3rd chilled water pump 8 of heat-exchanger rig 7 are connected by second pipe 10 loops with Ice Storage Tank 9.
The evaporimeter 13-1 of ice making unit 13 is arranged in Ice Storage Tank 9.
Exporting other the 4th pipeline 12 that connects on the pipeline being connected with the evaporimeter 1-2 of refrigeration unit 1, other being connected on the pipeline being connected with the first chilled water pump 2 imports of the other end of the 4th pipeline 12 is connected in series condenser 13-2 and first valve 14 of ice making unit 13 on the 4th pipeline 12.
On the first pipeline 4 between the 4th pipeline 12 and end equipment 3, the second valve 11 is set.
By above connection, form:
1, a chilled water circuit: the cold fluid pass 7-2 of Ice Storage Tank 9, the 3rd chilled water pump 8, heat-exchanger rig 7 is connected into a loop by a chilled water tube connector.
2, secondary chilled water circuit: by secondary chilled water tube connector by the condenser 13-2 of the evaporimeter of the first chilled water pump 2, the second chilled water pump 6, refrigeration unit 1, ice making unit, the first valve 14, the second valve 11, end equipment 3(as fan coil) connect into a loop.
The present invention can realize plurality of operating modes:
1, ice-storage mode
The first valve 14 is opened, and the first chilled water pump 2 moves, refrigeration unit 1, the 13 start operations of ice making unit;
The second valve 11 is closed, and 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 is supplied with after being chilled in advance 2～20 ℃ by refrigeration unit 1.
Secondary chilled water circuit: secondary chilled water is inputted the evaporimeter 1-2 of refrigeration unit 1 through the first chilled water pump 2, absorbs after cold, flows into the condenser 13-2 of ice making unit, after released cold quantity, then returns to the first chilled water pump 2 through the first valve 14, enters next circulation.
Ice making unit (cold-producing medium) loop: the gaseous refrigerant of low-temp low-pressure is collapsed into the gaseous refrigerant of HTHP by ice making unit 13 inner compressors, flow into the condenser 13-2 of ice making unit 13,, condensation cooling through chilled water became cold anticyclone liquid, become liquid state and the gaseous state mix refrigerant of low-temp low-pressure through the interior throttling arrangement reducing pressure by regulating flow of ice making unit 13, enter the evaporimeter 13-1 that is positioned at Ice Storage Tank 9, the heat of vaporization that absorbs Ice Storage Tank 9 interior water becomes the gaseous refrigerant of low-temp low-pressure, make evaporimeter 13-1 surface freeze simultaneously, realize and freeze ice-reserving object; The gaseous refrigerant of low-temp low-pressure returns to ice making unit 13 inner compressors, completes ice-reserving circulation.
The heat of vaporization of the liquid refrigerant absorption Ice Storage Tank 9 interior water of the evaporimeter 13-1 in Ice Storage Tank 9 becomes the gaseous refrigerant of low-temp low-pressure, makes evaporimeter 13-1 surface freeze simultaneously, realizes and freezes ice-reserving object; The gaseous refrigerant of low-temp low-pressure enters ice making unit 13, become the gaseous refrigerant of HTHP by compressor compresses, flow into condenser 13-2, after chilled water is cooling, condensation became cold anticyclone liquid reducing pressure by regulating flow in throttle mechanism becomes liquid state and the gaseous state mix refrigerant of low-temp low-pressure, and return to the evaporimeter 13-1 in Ice Storage Tank 9, complete ice-reserving circulation.
2, ice-reserving cooling pattern simultaneously:
First and second valve 14,11 is opened, and the first chilled water pump 2 moves, 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 is supplied with after being chilled in advance 2～20 ℃ by refrigeration unit 1.
Secondary chilled water circuit: the evaporimeter 1-2 that secondary chilled water is inputted refrigeration unit 1 through the first chilled water pump 2 absorbs after cold, a part flows into the condenser 13-2 of ice making unit 13, after released cold quantity, then return to the first chilled water pump 2 through the first valve 14, enter 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 11, enters next circulation.
Ice making unit (cold-producing medium) loop: the gaseous refrigerant of low-temp low-pressure is collapsed into the gaseous refrigerant of HTHP by ice making unit 13 inner compressors, flow into the condenser 13-2 of ice making unit 13,, condensation cooling through chilled water became cold anticyclone liquid, become liquid state and the gaseous state mix refrigerant of low-temp low-pressure through the interior throttling arrangement reducing pressure by regulating flow of ice making unit 13, enter the evaporimeter 13-1 that is positioned at Ice Storage Tank 9, the heat of vaporization that absorbs Ice Storage Tank 9 interior water becomes the gaseous refrigerant of low-temp low-pressure, make evaporimeter 13-1 surface freeze simultaneously, realize and freeze ice-reserving object; The gaseous refrigerant of low-temp low-pressure returns to ice making unit 13 inner compressors, completes ice-reserving circulation.
The heat of vaporization of the liquid refrigerant absorption ice-reserving trough inner water of the evaporimeter 13-1 in Ice Storage Tank 9 becomes the gaseous refrigerant of low-temp low-pressure, makes evaporimeter 13-1 surface freeze simultaneously, realizes and freezes ice-reserving object; The gaseous refrigerant of low-temp low-pressure enters ice making unit, become the gaseous refrigerant of HTHP by compressor compresses, flow into condenser 13-2, after chilled water is cooling, condensation became cold anticyclone liquid reducing pressure by regulating flow in throttle mechanism becomes liquid state and the gaseous state mix refrigerant of low-temp low-pressure, and return to the evaporimeter 13-1 in Ice Storage Tank 9, complete ice-reserving circulation.
3, the independent cooling pattern of conventional unit:
The second valve 11 is opened, and the first chilled water pump 2 moves; Refrigeration unit 1 start operation;
The first valve 14 is closed, and the 3rd chilled water pump 8, the second chilled water pump 6 are out of service, and ice making unit 13 is shut down.
Secondary chilled water circuit: secondary chilled water is inputted the evaporimeter 1-2 of refrigeration unit 1 through the first chilled water pump 2, absorbs after cold, flows into end equipment 3 coolings, after released cold quantity, then returns to the first chilled water pump 2 by the second valve 11, enters next circulation.
4, the independent cooling pattern of Ice Storage Tank:
The second valve 11 is opened, and the 3rd chilled water pump 8, the second chilled water pump 6 move;
The first valve 14 is closed, and the first chilled water pump 2 is out of service, refrigeration unit 1, ice making compressor emergency shutdown.
A chilled water circuit a: chilled water is inputted the cold fluid pass 7-2 of heat-exchanger rig 7 through the 3rd chilled water pump 8, after released cold quantity, enters in 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 the chilled-water flow of cold fluid pass 7-2 that enters heat-exchanger rig 7, to regulate the temperature of chilled water of zone of heat liberation 7-1 of heat-exchanger rig 7.
Secondary chilled water circuit: secondary chilled water is inputted the zone of heat liberation 7-1 of heat-exchanger rig 7 through the second chilled water pump 6, absorbs after cold, flows into end equipment 3 coolings, after released cold quantity, then through the second valve 11, returns to the second chilled water pump 6, enters next circulation.
5, Ice Storage Tank and conventional unit air conditioning pattern:
The second valve 11 is opened, and the 3rd chilled water pump 8, the first chilled water pump 2, the second chilled water pump 6 move, refrigeration unit 1 start operation;
The first valve 14 is closed, 13 groups of shutdown of ice machine.
A chilled water circuit a: chilled water is inputted the cold fluid pass 7-2 of heat-exchanger rig 7 through the 3rd chilled water pump 8, after released cold quantity, enters in 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 the chilled-water flow of cold fluid pass 7-2 that enters heat-exchanger rig 7, to regulate the temperature of chilled water of zone of heat liberation 7-1 of heat-exchanger rig 7.
Secondary chilled water circuit a: part for secondary chilled water is inputted the zone of heat liberation 7-1 of heat-exchanger rig 7 through the second chilled water pump 6, absorbs after cold, flows into end equipment 3 coolings, after released cold quantity, through the second valve 11, return to the second chilled water pump 6 again, enter next circulation; Another part of secondary chilled water is inputted the evaporimeter 1-2 of refrigeration unit 1 through the first chilled water pump 2, absorb after cold, flows into end equipment 3 coolings, after released cold quantity, then through the second valve 11, returns to the first chilled water pump 2, enters next circulation.
Two, embodiment bis-:
As shown in Figure 2, other with embodiment mono-, but the 3rd chilled water pump 8 is common chilled water pump.
Separately, between the second pipe 10 at cold fluid pass 7-2 two ends that connects heat-exchanger rig 7, connect the 5th pipeline 16, on the 5th pipeline 16, be connected in series the 3rd valve 17, on the second pipe 10 between the 5th pipeline 16 and the cold fluid pass 7-2 of heat-exchanger rig 7, be connected in series the 4th valve 18.
Regulate a chilled-water flow of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by valve 17, valve 18, 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, other with embodiment mono-, but the 3rd chilled water pump 8 is common chilled water pump.
Separately, between the second pipe 10 at cold fluid pass 7-2 two ends that connects heat-exchanger rig 7, connect the 5th pipeline 16, be connected in series a three-way valve 17 at the 5th pipeline 16 with the mouth that crosses of second pipe 10.
Regulate a chilled-water flow of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by three-way valve 17, 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, other with embodiment mono-, but the 3rd chilled water pump 8 is common chilled water pump.
Separately, between the second pipe 10 that connects Ice Storage Tank 9 two ends, connect the 5th pipeline 16, on the 5th pipeline 16, be connected in series the 3rd valve 17, on the second pipe 10 between the 5th pipeline 16 and Ice Storage Tank 9, be connected in series the 4th valve 18.
Regulate a chilled water temperature of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by the 3rd valve 17, the 4th valve 18, 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, other with embodiment mono-, but the 3rd chilled water pump 8 is common chilled water pump.
Separately, between the second pipe 10 that connects Ice Storage Tank 9 two ends, connect the 5th pipeline 16, be connected in series a three-way valve 17 at the 5th pipeline 16 with the mouth that crosses of second pipe 10.
Regulate a chilled water temperature of the cold fluid pass 7-2 that enters heat-exchanger rig 7 by three-way valve 17, to regulate the secondary chilled water temperature in the zone of heat liberation 7-1 of heat-exchanger rig 7.
Claims (6)
1. direct evaporating ice-storage refrigerating system, the end equipment that comprises refrigeration unit, is communicated with by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, Ice Storage Tank, the evaporimeter of described ice making unit is arranged in Ice Storage Tank, and described Ice Storage Tank is connected by second pipe 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 3rd pipeline; Also comprise the circulating pump and the control valve that are arranged on each described pipeline, it is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 4th pipeline, on described the 4th 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; Evaporimeter, end equipment and first chilled water pump of described refrigeration unit are connected by the first pipeline successively loop; Other the 3rd pipeline that connects on the first pipeline between described end equipment and the first chilled water pump, on described the 3rd pipeline, be connected in series the zone of heat liberation of the second chilled water pump, heat-exchanger rig, 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 3rd pipeline; Cold fluid pass, the 3rd chilled water pump and the Ice Storage Tank of described heat-exchanger rig are connected by the mutual loop of second pipe; Other the 4th pipeline that connects on the pipeline being connected with 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 4th pipeline is connected in series condenser and first valve of ice making unit on described the 4th pipeline; On the first pipeline between described the 4th pipeline and described end equipment, the second valve is set, described end equipment, described the second valve are connected successively with described the first chilled water pump; Described the 3rd chilled water pump is variable-flow formula chilled water pump.
2. direct evaporating ice-storage refrigerating system, the end equipment that comprises refrigeration unit, is communicated with by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, Ice Storage Tank, the evaporimeter of described ice making unit is arranged in Ice Storage Tank, and described Ice Storage Tank is connected by second pipe 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 3rd pipeline; Also comprise the circulating pump and the control valve that are arranged on each described pipeline, it is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 4th pipeline, on described the 4th 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; Evaporimeter, end equipment and first chilled water pump of described refrigeration unit are connected by the first pipeline successively loop; Other the 3rd pipeline that connects on the first pipeline between described end equipment and the first chilled water pump, on described the 3rd pipeline, be connected in series the zone of heat liberation of the second chilled water pump, heat-exchanger rig, 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 3rd pipeline; Cold fluid pass, the 3rd chilled water pump and the Ice Storage Tank of described heat-exchanger rig are connected by the mutual loop of second pipe; Other the 4th pipeline that connects on the pipeline being connected with 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 4th pipeline is connected in series condenser and first valve of ice making unit on described the 4th pipeline; On the first pipeline between described the 4th pipeline and described end equipment, the second valve is set; Between the second pipe at the cold fluid pass two ends of described connection heat-exchanger rig, connect the 5th pipeline, on described the 5th pipeline, be connected in series the 3rd valve, on the second pipe between described the 5th pipeline and the cold fluid pass of described heat-exchanger rig, be connected in series the 4th valve; Described the 4th valve is between the downstream and described cold fluid pass of described the 3rd chilled water pump.
3. direct evaporating ice-storage refrigerating system, the end equipment that comprises refrigeration unit, is communicated with by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, Ice Storage Tank, the evaporimeter of described ice making unit is arranged in Ice Storage Tank, and described Ice Storage Tank is connected by second pipe 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 3rd pipeline; Also comprise the circulating pump and the control valve that are arranged on each described pipeline, it is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 4th pipeline, on described the 4th 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; Evaporimeter, end equipment and first chilled water pump of described refrigeration unit are connected by the first pipeline successively loop; Other the 3rd pipeline that connects on the first pipeline between described end equipment and the first chilled water pump, on described the 3rd pipeline, be connected in series the zone of heat liberation of the second chilled water pump, heat-exchanger rig, 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 3rd pipeline; Cold fluid pass, the 3rd chilled water pump and the Ice Storage Tank of described heat-exchanger rig are connected by the mutual loop of second pipe; Other the 4th pipeline that connects on the pipeline being connected with 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 4th pipeline is connected in series condenser and first valve of ice making unit on described the 4th pipeline; On the first pipeline between described the 4th pipeline and described end equipment, the second valve is set; Between the second pipe at the cold fluid pass two ends of described connection heat-exchanger rig, connect the 5th pipeline, crossing mouthful and being positioned at described the 3rd chilled water pump downstream and be connected in series a three-way valve at described the 5th pipeline and second pipe.
4. direct evaporating ice-storage refrigerating system, the end equipment that comprises refrigeration unit, is communicated with by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, Ice Storage Tank, the evaporimeter of described ice making unit is arranged in Ice Storage Tank, and described Ice Storage Tank is connected by second pipe 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 3rd pipeline; Also comprise the circulating pump and the control valve that are arranged on each described pipeline, it is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 4th pipeline, on described the 4th 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; Evaporimeter, end equipment and first chilled water pump of described refrigeration unit are connected by the first pipeline successively loop; Other the 3rd pipeline that connects on the first pipeline between described end equipment and the first chilled water pump, on described the 3rd pipeline, be connected in series the zone of heat liberation of the second chilled water pump, heat-exchanger rig, 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 3rd pipeline; Cold fluid pass, the 3rd chilled water pump and the Ice Storage Tank of described heat-exchanger rig are connected by the mutual loop of second pipe; Other the 4th pipeline that connects on the pipeline being connected with 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 4th pipeline is connected in series condenser and first valve of ice making unit on described the 4th pipeline; On the first pipeline between described the 4th pipeline and described end equipment, the second valve is set; Other the 5th pipeline that connects on the second pipe between described connection Ice Storage Tank two ends, on described the 5th pipeline, be connected in series the 3rd valve, on the second pipe between described the 5th pipeline and described Ice Storage Tank, be connected in series the 4th valve, and described Ice Storage Tank, described the 4th valve are connected successively with described the 3rd chilled water pump.
5. direct evaporating ice-storage refrigerating system, the end equipment that comprises refrigeration unit, is communicated with by the first pipeline loop with the evaporimeter of refrigeration unit, also comprise ice making unit, heat-exchanger rig, Ice Storage Tank, the evaporimeter of described ice making unit is arranged in Ice Storage Tank, and described Ice Storage Tank is connected by second pipe 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 3rd pipeline; Also comprise the circulating pump and the control valve that are arranged on each described pipeline, it is characterized in that: between the condenser of ice making unit and the evaporimeter of refrigeration unit, loop arranges the 4th pipeline, on described the 4th 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; Evaporimeter, end equipment and first chilled water pump of described refrigeration unit are connected by the first pipeline successively loop; Other the 3rd pipeline that connects on the first pipeline between described end equipment and the first chilled water pump, on described the 3rd pipeline, be connected in series the zone of heat liberation of the second chilled water pump, heat-exchanger rig, 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 3rd pipeline; Cold fluid pass, the 3rd chilled water pump and the Ice Storage Tank of described heat-exchanger rig are connected by the mutual loop of second pipe; Other the 4th pipeline that connects on the pipeline being connected with 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 4th pipeline is connected in series condenser and first valve of ice making unit on described the 4th pipeline; On the first pipeline between described the 4th pipeline and described end equipment, the second valve is set; Between the second pipe of described connection Ice Storage Tank end, connect the 5th pipeline, be connected in series a three-way valve at the upstream side place that crosses mouthful and be positioned at described the 3rd chilled water pump of described the 5th pipeline and second pipe.
6. the use method that direct evaporating ice-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.
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| CN201110316232.4A CN102506473B (en) | 2011-10-18 | 2011-10-18 | Direct-evaporating type ice cold accumulation refrigerating system and refrigerating method thereof |
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| CN201110316232.4A CN102506473B (en) | 2011-10-18 | 2011-10-18 | Direct-evaporating type ice cold accumulation refrigerating system and refrigerating method thereof |
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| CN104180606B (en) * | 2014-08-27 | 2016-08-24 | 无锡溥汇机械科技有限公司 | A kind of air-cooled integral type frozen water machine precision heat-exchange system |
| CN105444316B (en) * | 2016-01-18 | 2022-05-10 | 深圳市海吉源科技有限公司 | Ultra-large temperature difference single tube long-distance water cold accumulation and supply system |
| CN107289654B (en) * | 2016-04-11 | 2019-08-02 | 青月村燊股份有限公司 | Refrigerator with deposit refrigerating capacity |
| CN110332632A (en) * | 2019-05-30 | 2019-10-15 | 苏州苏暖新能源节能技术服务有限公司 | Direct evaporating ice-storage refrigerating system |
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| CN1465941A (en) * | 2002-06-28 | 2004-01-07 | 清华大学 | Direct evaporation close type external ice-melting heat-pump air-conditioner |
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