CN100427855C - Refrigerating system and its controlling method - Google Patents
Refrigerating system and its controlling method Download PDFInfo
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- CN100427855C CN100427855C CNB2004100921277A CN200410092127A CN100427855C CN 100427855 C CN100427855 C CN 100427855C CN B2004100921277 A CNB2004100921277 A CN B2004100921277A CN 200410092127 A CN200410092127 A CN 200410092127A CN 100427855 C CN100427855 C CN 100427855C
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/22—Refrigeration systems for supermarkets
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Abstract
The invention provides a refrigeration system and its control method capable of improving energy consumption efficiency. This refrigeration system 1 comprises a cascade heat exchanger 21 for heat exchange between a refrigerant at a low-pressure side of a refrigerant circuit 7 for air conditioning and a refrigerant at a high-pressure side of a refrigerant circuit 9 for cooling. A compressor for air conditioning is operated in a case when a compressor for cooling is operated in a state that a cooling thermostat is switched off and the compressor for air conditioning is stopped, to supply the refrigerant at the low-pressure side of the compressor for air conditioning to the cascade heat exchanger 21. Thereby the refrigerant at the high-pressure side of the refrigerant circuit 9 for cooling can be supercooled even when the cooling thermostat is switched off, and the cooling performance and the operation efficiency of a cooling system part 8 can be improved.
Description
Technical field
The present invention relates to a kind of refrigeration system that carries out that room air is regulated and the equipment of being cooled is cooled off and the control method of this refrigeration system.
Background technology
In recent years, comprise the air-conditioning system portion of the air conditioning that shops such as carrying out convenience store is indoor and the refrigeration system of cooling system portion that the equipment that is cooled (refrigerating box etc.) that is arranged in the shop is cooled off is suggested (for example patent documentation 1).
This refrigeration system is being required to improve the capacity usage ratio (COP etc.) of entire system.
Yet, this refrigeration system only respectively the load of the load of corresponding air conditioning, cooling device independently carry out the operation of air-conditioning system portion and the operation of cooling system portion, compare as the situation of independent device respectively with air-conditioning system portion and cooling device, capacity usage ratio is almost constant.
Summary of the invention
The present invention researches and develops in view of the above problems, and its purpose is to provide a kind of control method that can improve refrigeration system He this refrigeration system of capacity usage ratio.
In order to solve the problems of the technologies described above, refrigeration system of the present invention has air-conditioning system portion, cooling system portion and fountain U type heat exchange of heat pipe.Above-mentioned air-conditioning system portion has and comprises air conditioning with compressor, heat source side heat exchanger and utilize the air conditioning of side heat exchanger to use the refrigerant loop, the operation air conditioning during with compressor by utilizing the side heat exchanger to carry out the room air adjusting; Above-mentioned cooling system portion has and comprises cooling and use the refrigerant loop with the cooling of compressor, condenser and evaporimeter, by evaporimeter the equipment of being cooled is cooled off when operation is cooled off with compressor; Above-mentioned fountain U type heat exchange of heat pipe is used for carrying out heat exchange between above-mentioned air conditioning is with the low-pressure side refrigerant in refrigerant loop and the high-pressure side refrigerant of above-mentioned cooling with the refrigerant loop.When compressor operating use in out of service and above-mentioned cooling with compressor, move above-mentioned air conditioning compressor in above-mentioned air conditioning, to the refrigerant of the low-pressure side of described fountain U type heat exchange of heat pipe air supply adjusting usefulness compressor.If adopt this structure, when using compressor operating owing to and above-mentioned cooling out of service at above-mentioned air conditioning usefulness compressor, operation air conditioning compressor, supply with the refrigerant of this air conditioning to above-mentioned fountain U type heat exchange of heat pipe with the compressor low-pressure side, so can carry out supercooling with the on high-tension side refrigerant in refrigerant loop to above-mentioned cooling, can improve the cooling capacity and the operational efficiency of cooling system portion.
In above-mentioned refrigeration system, best above-mentioned air-conditioning system portion when indoor temperature and predefined temperature is roughly the same or the hot closed condition of freezing when following for above-mentioned predefined temperature under above-mentioned air conditioning when compressor operating is used in out of service and above-mentioned cooling with compressor, move above-mentioned air conditioning compressor, supply with the refrigerant of above-mentioned air conditioning with the low-pressure side in refrigerant loop to above-mentioned fountain U type heat exchange of heat pipe.In addition, when refrigeration heat was closed and moved above-mentioned air conditioning and uses compressor, above-mentioned air conditioning preferably was controlled in the predefined frequency range with the speed of compressor.
In above-mentioned refrigeration system, preferably, above-mentioned air-conditioning system portion asks for the above-mentioned cooling that is used for flowing to above-mentioned fountain U type heat exchange of heat pipe and is set to the target speed of the above-mentioned air conditioning of the predefined temperature difference with compressor with the on high-tension side refrigerant inlet temperature in refrigerant loop and the temperature difference of outlet temperature; On the one hand, when above-mentioned target speed is in above-mentioned predefined frequency range, above-mentioned air conditioning is controlled to be this target speed with the speed of compressor, on the other hand, and the above-mentioned temperature difference roughly consistent with the above-mentioned lower frequency limit that preestablishes frequency is more than the set point of temperature of the above-mentioned setting temperature difference when speed, and speed is roughly consistent with the above-mentioned upper limiting frequency that preestablishes frequency and the above-mentioned temperature difference is the set point of temperature of afore mentioned rules temperature difference when following, ends the operation of above-mentioned air conditioning with compressor.
In addition, in above-mentioned refrigeration system, above-mentioned air-conditioning system portion preferably adjusts above-mentioned target speed, and making what flow to above-mentioned fountain U type heat exchange of heat pipe is more than the external air temperature in above-mentioned cooling with the on high-tension side outlet refrigerant temperature in refrigerant loop.In this structure, preferably change the above-mentioned setting temperature difference corresponding to external air temperature.
In addition, in above-mentioned refrigeration system, use in the refrigerant loop in above-mentioned air conditioning, at above-mentioned heat source side heat exchanger and above-mentioned the utilization first expansion valve is set between the side heat exchanger, simultaneously, refrigerant pipe fork between above-mentioned heat source side heat exchanger and above-mentioned first expansion valve, this bifurcated pipe is situated between and is connected with above-mentioned fountain U type heat exchange of heat pipe by second expansion valve, the valve opening of above-mentioned second expansion valve is controlled, makes the above-mentioned cooling that flows to above-mentioned fountain U type heat exchange of heat pipe become the above-mentioned setting temperature difference with the on high-tension side refrigerant inlet temperature in refrigerant loop and the temperature difference of outlet temperature.
In addition, the invention provides a kind of control method of the refrigeration system that carries out that room air is regulated and the equipment of being cooled is cooled off, it is characterized in that above-mentioned refrigeration system has air-conditioning system portion, cooling system portion and fountain U type heat exchange of heat pipe.Above-mentioned air-conditioning system portion has and comprises air conditioning with compressor, heat source side heat exchanger and utilize the air conditioning of side heat exchanger to use the refrigerant loop, the operation air conditioning during with compressor by utilizing the side heat exchanger to carry out the room air adjusting; Above-mentioned cooling system portion has and comprises cooling and use the refrigerant loop with the cooling of compressor, condenser and evaporimeter, cooling is carried out cooling to the equipment of being cooled by evaporimeter during with compressor operating, and above-mentioned fountain U type heat exchange of heat pipe is used for carrying out heat exchange between above-mentioned air conditioning is with the refrigerant of the low-pressure side in refrigerant loop and the on high-tension side refrigerant of above-mentioned cooling with the refrigerant loop.When compressor operating use in out of service and above-mentioned cooling with compressor, move above-mentioned air conditioning compressor in above-mentioned air conditioning, to the refrigerant of the low-pressure side of above-mentioned fountain U type heat exchange of heat pipe air supply adjusting usefulness compressor.If adopt this method, when using compressor operating owing to and above-mentioned cooling out of service at air conditioning usefulness compressor, operation air conditioning compressor, regulate the refrigerant of the low-pressure side of using compressor to above-mentioned fountain U type heat exchange of heat pipe air supply, so can carry out supercooling to the on high-tension side refrigerant that cools off with the refrigerant loop, improve the cooling capacity and the operational efficiency of cooling system portion.
In addition, in above-mentioned control method, in indoor temperature and predefined temperature is roughly the same or freeze when following under the hot closed condition for the above-mentioned temperature that preestablishes, above-mentioned air conditioning is when compressor operating is used in out of service and above-mentioned cooling with compressor, move above-mentioned air conditioning compressor, supply with the refrigerant of above-mentioned air conditioning with the low-pressure side in refrigerant loop to above-mentioned fountain U type heat exchange of heat pipe.In addition, when refrigeration heat is closed and moved above-mentioned air conditioning and uses compressor, can be controlled at the speed of above-mentioned air conditioning in the predefined frequency range with compressor.
And, in above-mentioned control method, preferably ask for the above-mentioned cooling that is used for flowing to above-mentioned fountain U type heat exchange of heat pipe is set to preestablish the temperature difference with the temperature difference of the on high-tension side refrigerant inlet temperature in refrigerant loop and outlet temperature above-mentioned air conditioning with compressor target speed; On the one hand,, the speed of above-mentioned air conditioning with compressor is controlled in this target speed when preestablishing in the frequency range above-mentioned when above-mentioned target speed; On the other hand, and the above-mentioned temperature difference roughly consistent with the above-mentioned lower frequency limit that preestablishes frequency is that the set point of temperature of the above-mentioned setting temperature difference is when above when speed, and in speed and the above-mentioned temperature difference roughly consistent with the above-mentioned upper limiting frequency that preestablishes frequency is the set point of temperature of above-mentioned setting temperature difference when following, can stop the operation of above-mentioned air conditioning with compressor.In this case, is more than the external air temperature for making the above-mentioned cooling that flows to above-mentioned fountain U type heat exchange of heat pipe with the on high-tension side refrigerant output temperature in refrigerant loop, can adjust above-mentioned target speed, in addition, can change the above-mentioned setting temperature difference by corresponding external air temperature.
The invention effect
Refrigeration system of the present invention can improve capacity usage ratio.
Description of drawings
Fig. 1 is the figure of system architecture in the refrigerant loop of the expression refrigeration system that comprises the invention process form;
Fig. 2 is the figure of heating operation of air-conditioning system portion that is used to illustrate the refrigeration system of the invention process form;
Fig. 3 is the flow chart of the action during expression refrigeration heat is closed.
Fig. 4 is the flow chart of the action during expression refrigeration heat is closed.
Description of reference numerals
1 refrigeration system; 3 refrigerating boxes; 4 household freezers; 6 air-conditioning system portions; The refrigerant loop is used in 7 air conditionings; 8 cooling system portions; The refrigerant loop is used in 9 coolings; 10 separators; 11 indoor units; 12 outdoor units; 13 compression units; 13A, 13B, 37,54 compressors; 17,18,19 expansion valves; 21 fountain U type heats exchange of heat pipe.
The specific embodiment
Introduce example of the present invention with reference to the accompanying drawings in detail.Fig. 1 is the figure of system architecture in the refrigerant loop of the demonstration refrigeration system 1 that comprises the invention process form.This refrigeration system 1 for example is applicable to shops such as convenience store, can realize in the shop 2 air conditioning and be arranged in the shop refrigerating box 3 of 2 storage equipment (equipment is cooled) and the case of household freezer 4 in cooling.Refrigerating box 3 is the casees that are used to display beverage and chilled food etc., and case is to refrigerated storage temperature (+3 ℃～+ 10 ℃); Household freezer 4 is the casees that are used to display the frozen food and the cold spot heart (cold Fruit) etc., is cooled to cryogenic temperature (30 ℃-10 ℃) in the case.
This cooling system 1 comprise the air-conditioning system portion 6 that carries out 2 air conditionings in the shop and carry out 2 refrigerating box 3 in the shop in and the case of household freezer 4 in the cooling system portion 8 of cooling off.Air-conditioning system portion 6 comprise be arranged in the shop a plurality of indoor units 11 of 2, be arranged on outdoor unit 12 outside the shop, between the span unit 11 and 12 and the air conditioning that is provided with refrigerant loop 7.
This air conditioning utilizes with refrigerant loop 7 and is arranged on utilizing side heat exchanger 27, be arranged on the heat source side heat exchanger 16 in the outdoor unit 12 and carry out freeze cycle as the compressor 13A and the 13B of compression unit 13 in the indoor unit 11.
Particularly, compressor 13A is conversion compressor (イ Application バ one Ya Shrink Machine), and compressor 13B is a constant speed control compressor.Above-mentioned compressor 13A and 13B parallel connection, the discharge side of compressor 13A and 13B is situated between and is converged by check- valves 5A, 5B, is connected with an inlet of cross valve.An outlet of cross valve 14 is connected with the inlet of heat source side heat exchanger 16.This heat source side heat exchanger 16 comprises that the smaller entrance side 16A of flow path resistance that is made of a plurality of pipe arrangements arranged side by side is pooled to the outlet side 16B of minority pipe arrangement arranged side by side or single pipe arrangement with them.The outlet of the outlet side 16B of this heat source side heat exchanger 16 is situated between by after expansion valve 17 and expansion valve 18 branches, is connected with the inlet that respectively utilizes side heat exchanger 27 of indoor unit 11.
Another inlet that respectively utilizes the outlet of side heat exchanger 27 to converge the interior cross valve 14 of back and outdoor unit 12 is connected.Another outlet of cross valve 14 is situated between and is connected with accumulator (ア キ ユ system レ one ) 23 by check-valves 22.The outlet of accumulator 23 is connected with the suction side of compressor 13A, 13B.Thus, the cold media of discharging from compression unit 13 is by heat source side heat exchanger 16 with utilize side heat exchanger 27 to return compression unit 13.
In refrigerant loop 7 is used in this air conditioning, the refrigerant pipe fork between expansion valve (first expansion valve) 17 and the expansion valve 18, this bifurcated pipe is situated between and is connected with fountain U type heat exchange of heat pipe (カ ス ケ one De Hot Jiao Change Machine) 21 by expansion valve (second expansion valve) 19.This fountain U type heat exchange of heat pipe 21 is fit to select for use heat-exchangers of the plate type, the a plurality of heat transfer plates of its lamination, between each heat transfer plate, alternately form coolant path 21A, the 21B of two kinds of refrigerant circulations, when coolant path 21A, the 21B that two kinds of refrigerants are flowed through adjacent, be situated between and carry out heat exchange by heat transfer plate.The inlet of 21, one coolant path 21A of this fountain U type heat exchange of heat pipe is connected with expansion valve 19, and its outlet is connected with the inlet of accumulator 23.Thus, utilize expansion valve 19 and after the refrigerant that becomes low pressure supplies to fountain U type heat exchange of heat pipe 21, return compression unit 13.
That is, in refrigeration system 1, the refrigerant circulating path is by forming via the path α that utilizes side heat exchanger 27 with via the path β of fountain U type heat exchange of heat pipe 21.
Outside air-conditioner controller 26 is made of mini-computer, according to the device of the air-conditioning system portion 6 of unit 12 sides outside outside air temperature and the refrigerant pressure controling chamber.Indoor air-conditioner controller 28 is made of mini-computer, indicate the device of controlling indoor unit 11 sides according to the user who transmits from remote control (not shown) and be situated between by acceptance division (not shown) input, indicate corresponding information etc. to be sent to outside air-conditioner controller 26 user with data communication.Pressure fan 24 is transported to heat source side heat exchanger 16 with extraneous air, and pressure fan 15 is transported to room air and utilizes side heat exchanger 27.
On the other hand, cooling system portion 8 has refrigerating box 3 and cooling household freezer 4 and outdoor unit 12 between the usefulness refrigerant loop 9 of span as storage equipment.This cooling utilize with refrigerant loop 9 refrigeration that is arranged on refrigerating box 3 with evaporimeter 43, be arranged on the interior condenser (heat exchanger) 38 of outdoor unit 12 and carry out freeze cycle as the compressor 37 and the compressor 54 of compression unit.
Particularly, the discharge side of compressor 37 is situated between and is connected with an inlet of cross valve 39 by separator 31, and an outlet of cross valve 39 is connected with the inlet of condenser 38.This condenser 38 comprises that the smaller entrance side 38A of flow path resistance that is made up of a plurality of pipe arrangements arranged side by side is pooled to the outlet side 38B of minority pipe arrangement arranged side by side or single pipe arrangement with them.The outlet of the outlet side 38B of this condenser 38 is connected with the inlet of storage tank 36.The outlet of this storage tank 36 is connected with an inlet of cross valve 41.That is, storage tank 36 is connected with the refrigerant downstream of condenser 38.
An outlet of cross valve 41 is connected with the inlet of another coolant path 21B of fountain U type heat exchange of heat pipe 21.The outlet of the coolant path 21B of fountain U type heat exchange of heat pipe 21 is connected with another inlet of cross valve 39.Another outlet of this cross valve 39 is connected with another inlet of cross valve 41.Another outlet fork of this cross valve 41 is three, first bifurcated pipe is situated between in turn and is connected with the inlet of a refrigeration with evaporimeter 43 with expansion valve 44 by magnetic valve 47,46, second bifurcated pipe is situated between in turn and is connected with the inlet of another refrigeration with evaporimeter 43 with expansion valve 44 by magnetic valve 46, and the 3rd bifurcated pipe is situated between and is connected with freezing inlet with evaporimeter 49 with expansion valve 51 by magnetic valve 52.The loop of connecting with this magnetic valve 52 and expansion valve 51 is parallel with magnetic valve 53.
Cold outlet of employing evaporimeter 49 is situated between and is connected by the suction side of check-valves 30 with compressor 54, and being situated between simultaneously is connected between the magnetic valve 46 and 47 of refrigeration with evaporimeter 43 sides by check-valves 48.The power output ratio piston compressor 37 of this compressor 54 is little, and it is discharged side Jie and is connected by the suction side of separator 45 with compressor 37.That is, compressor 37 and compressor 54 are connected on the refrigerant loop.Each refrigeration is connected between separator 45 and the compressor 37 after converging with the outlet of evaporimeter 43.The suction side of compressor 37 is situated between and is connected by the outlet of check-valves 42 with separator 31.
Outside cooling controller 32 is made of mini-computer, comes the device of the cooling system portion 8 of outdoor unit 12 sides is controlled according to outside air temperature and refrigerant pressure.Indoor refrigeration controller 50 is made of mini-computer, comes the device of cooling system portion 8 is controlled according to refrigeration the temperature inside the box with storage equipment (refrigerating box 3).The freezing controller in indoor 55 is made of mini-computer, comes the device of cooling system portion 8 is controlled according to freezing the temperature inside the box with storage equipment (household freezer 4).Pressure fan 35 is carried extraneous air to condenser 38, and pressure fan 20 is transported to condenser 38 with air in the case in the refrigerating box 3, and pressure fan 25 is transported to air in the case of household freezer 4 freezing with evaporimeter 49.
In addition, this refrigeration system 1 has master controller 56.Master controller 56 is made of mini-computer, comes refrigeration system 1 integral body is controlled by carrying out data communication with outside air-conditioner controller 26, indoor air-conditioner controller 28, outside cooling controller 32, indoor refrigeration controller 50 and the freezing controller 55 in indoor.In this refrigeration system 1, air conditioning is used different refrigerant with cooling with refrigerant loop 9 with refrigerant loop 7, and for example, air conditioning is with using R410A in the refrigerant loop 7, and cooling is with using the R404A higher than R410A boiling point in the refrigerant loop 9.Thereby, because use only refrigerant respectively in each refrigerant loop of this refrigeration system 1, so can improve the free degree of loop design.
Action to refrigeration system 1 describes below.
In this refrigeration system 1, air-conditioning system portion 6 utilizes outside air-conditioner controller 26 and indoor air-conditioner controller 28, the difference of temperature (indoor temperature TA) is carried out refrigerating operaton and heating operation in design temperature that corresponding Jie is indicated by remote control and the shop, and indoor temperature is adjusted to design temperature.Cooling system portion 8 is under the control of outside cooling controller 32, indoor refrigeration controller 50 and the freezing controller 55 in indoor, the temperature inside the box of refrigerating box 3 is adjusted to predefined refrigerated storage temperature, simultaneously, the temperature inside the box of household freezer 4 is adjusted to predefined cryogenic temperature.
Particularly, in this refrigeration system 1, master controller 56 is by carrying out data communication with each controller 26,28,32,50,55, receive the data of air-conditioning system portion 6 and cooling system portion 8 current running statuses, according to the data that receive, decision aftermentioned optimum operational mode constantly sends the service data of the data of this optimum operational mode and each device to each controller 26,28,32,50,55.Then, each controller 26,28,32,50,55 carries out control action described later according to the data that receive from master controller 56.
(1) refrigerating operaton of air-conditioning system
At first, judge that at indoor air-conditioner controller 28 refrigerating operaton of air-conditioning system portion 6 is the most in good time execution refrigerating operaton, sends predetermined data to outside air-conditioner controller 26 and master controller 56.Simultaneously, the master controller 56 that receives these data sends these data to outside cooling controller 32, indoor refrigeration controller 50, the freezing controller 55 in indoor.
As shown in Figure 1, outside air-conditioner controller 26 is communicated with an inlet (with the connector of separator 10) of cross valve 14 according to receiving data with an outlet (with the connector of heat source side heat exchanger 16), another inlet (with the connector that utilizes side heat exchanger 27) is communicated with another outlet (with the connector of accumulator 23).And expansion valve is all opened shape for 17 one-tenth, makes compressor 13A, 13B operation.In addition, air-conditioner controller 26 couples of compressor 13A in outside carry out running frequency conversion and control and ability control.
During compressor 13A, 13B operation, discharge the high temperature and high pressure gas refrigerant that side is discharged, enter the entrance side 16A of heat source side heat exchanger 16 from separator 10 via cross valve 14 from compressor 13A, 13B.Utilize pressure fan 24 to carry out extraneous gas in this heat source side heat exchanger 16 and ventilate, refrigerant is in this heat release and condensation liquefaction.That is, at this moment, heat source side heat exchanger 16 has the function of condenser.This liquid refrigerants diverges by expansion valve 17 backs via heat source side heat exchanger 16.One of fork to expansion valve 18, at this by throttling (Twisted Ru) be low pressure after (decompression), the fork inflow respectively utilizes side heat exchanger 27, evaporates herein.
Utilize at this and to utilize pressure fan 15 to carry out room air (air in the shop) in side heat exchanger 27 to ventilate, utilize the heat-absorbing action of refrigerant evaporation that room air is cooled off.Thus, carry out the refrigeration in indoor (in the shop).
Supply to the suction side of compressor 13A and 13B after converging from the cryogenic gas refrigerant that utilizes side heat exchanger 27 to come out in turn through cross valve 14, check-valves 22, accumulator 23, like this, circulate repeatedly.
In addition, pass through expansion valve 17 and another part refrigerant arrival expansion valve 19 of fork, after this is become low pressure by throttling (decompression), flow into the coolant path 21A of fountain U type heat exchange of heat pipe 21, in this evaporation.This air conditioning with the heat-absorbing action of the refrigerant evaporation in refrigerant loop 7 under 21 coolings of fountain U type heat exchange of heat pipe, become low temperature.The cryogenic gas refrigerant that flows out fountain U type heat exchange of heat pipe 21 is fed into compressor 13A and 13B suction side through accumulator 23, circulation so repeatedly.
Indoor air-conditioner controller 28 is regulated to the pressure fan 15 that utilizes 27 air-supplies of side heat exchanger by the detected air themperature of utilizing the temperature of side heat exchanger 27 or being inhaled into it of temperature sensor (not shown) according to being situated between, and makes the temperature in indoor (in the shop) become predefined temperature.The information conveyance of this indoor air-conditioner controller 28 is to outside air-conditioner controller 26, and outside air-conditioner controller 26 is according to the operation of this information control compressor 13A and 13B.
Outside air-conditioner controller 26 is according to being situated between by the refrigerant temperature of the detected gateway that utilizes side heat exchanger 27 of temperature sensor (not shown) or utilizing the temperature of side heat exchanger 27 and the refrigerant temperature of the gateway of fountain U type heat exchange of heat pipe 21 or the temperature of fountain U type heat exchange of heat pipe 21, adjust the valve opening of expansion valve 18,19, making becomes the suitable degree of superheat.
In addition, outside cooling controller 32 needs and will supply to condenser 38 from the high temperature and high pressure gas refrigerant that compressor 37 is discharged, use an inlet (with the connector of separator 31) of the cross valve 39 in refrigerant loop 9 to be communicated with the cooling of cooling system portion 8, another inlet (with the connector of fountain U type heat exchange of heat pipe 21) and another outlet (with the connector of cross valve 41) are communicated with an outlet (with the connector of condenser 38).
In addition, outside cooling controller 32 needs to supply to fountain U type heat exchange of heat pipe 21 by the gas coolant of condenser 38, an inlet (with the connector of cross valve 39) of cross valve 41 is communicated with an outlet (with refrigerating with evaporimeter 43 and freezing connector with evaporimeter 49 ( magnetic valve 46,47,52)), another inlet (with the connector of storage tank 36) and another outlet (with the connector of fountain U type heat exchange of heat pipe 21) are communicated with.And, operation compressor 37 and 54.
Thus, after the high temperature and high pressure gas refrigerant of discharging from compressor 37 utilizes separator 31 separating oil, be imported into the entrance side 38A of condenser 38 through cross valve 39.Utilize pressure fan 35 to carry out extraneous air in this condenser 38 and ventilate, the refrigerant that flows into condenser 38 is emitted heat and condensation at this.The refrigerant of emitting from this condenser 38 enters in the storage tank 36, slips in this temporary transient storage, carries out gas/liquid and separates.Liquid refrigerants after the separation comes out by behind the cross valve 41 from storage tank 36, enters the coolant path 21B of fountain U type heat exchange of heat pipe 21.The cooling that supplies to this fountain U type heat exchange of heat pipe 21 is with the refrigerant in refrigerant loop 9, and utilize by above-mentioned air conditioning and cool off with the fountain U type heat exchange of heat pipe 21 that the refrigerant evaporation in refrigerant loop 7 becomes low temperature, and then supercooling.In addition, as above above-mentioned, because the rear of condenser 38 is provided with storage tank 36, so the heat loss when eliminating supercooling simultaneously, can be adjusted matchmaker's amount.
Diverge by cross valve 39,41 backs in turn by this fountain U type heat exchange of heat pipe 21 overcooled refrigerants, a part is further diverged, another part is in turn by magnetic valve 47,46, by after expansion valve 44 throttlings (decompression), be fed into a refrigeration with evaporimeter 43, in this evaporation, another part behind the fork arrives expansion valve 44 by magnetic valve 46, after this throttling (decompression), enter another refrigeration with evaporimeter 43, in this evaporation.Each refrigeration utilize in evaporimeter 43 pressure fan 20 with the case of refrigerating box 3 in the air circulation of ventilating respectively, utilize the heat-absorbing action of refrigerant evaporation that the interior air of each case is cooled off.Thereby the interior cooling of the case that carries out refrigerating box 3.After the cryogenic gas refrigerant that comes out with evaporimeter 43 from above-mentioned refrigeration converges, arrive the outlet side of the separator 45 of compressor 54.
In addition, arrive expansion valve 51 by magnetic valve 52, after this throttling (decompression), supply to freezing with evaporimeter 49, in this evaporation by another part refrigerant that diverges after 21 supercooling of fountain U type heat exchange of heat pipe.In this cooling evaporimeter 49, utilize pressure fan 25 to carry out air draught circulation in the case of refrigeration case 4, utilize the heat-absorbing action of refrigerant evaporation to make air cooling in the case.Thus, carry out the interior cooling of case of household freezer 4.
Arrive compressor 54 from the freezing cryogenic gas refrigerant that comes out with evaporimeter 49 through check-valves 30, compress behind the pressure (low-pressure lateral pressure of refrigerating system) that arrives refrigeration evaporator 43 outlet sides at this, discharge from compressor 54, after separator 45 separating oil, and converge with the refrigerant of evaporimeter 43 from refrigeration.Refrigerant after converging is inhaled into the suction side of compressor 38, like this, circulates repeatedly.
Refrigeration controller 50 in indoor is controlled the valve opening of each expansion valve 44 respectively according to cold air temperature that is discharged from evaporimeter 43 by the temperature inside the box of the detected refrigerating box 3 of temperature sensor (not shown) or through refrigeration or the temperature from the outlet side of evaporimeter 43 to refrigeration that use evaporimeter 43 with the suction cold air temperature and the refrigeration of evaporimeter 43 with the refrigerant temperature or the refrigeration of of being situated between.Thus, maintain above-mentioned refrigerated storage temperature in the case with refrigerating box 3, and form the suitable degree of superheat (degree of superheat is fixed).
In addition, the freezing controller 55 in indoor is according to the temperature inside the box of household freezer 4 or through the freezing cold air temperature that is discharged from evaporimeter 49 or to freezing suction cold air temperature and the refrigerant temperature of freezing outlet side with evaporimeter 49 or freezing temperature with evaporimeter 49 valve opening of controlling expansion valve 51 with evaporimeter 49.Thus, maintain above-mentioned cryogenic temperature in the case with household freezer 4, and form the suitable degree of superheat (degree of superheat is fixed).
Outside cooling controller 32 when any one is opened when each expansion valve 44,51 according to the pressure of the suction side of compressor 37 (cooling with the low-pressure in refrigerant loop 9) control the running frequency of compressor 37, when each expansion valve 44,51 Close All, stop the operation of compressor 37.
Like this, in refrigerating operaton, through the low-pressure side refrigerant of air conditioning, carry out supercooling to fountain U type heat exchange of heat pipe 21 supply flows, can improve the cooling capacity and the operational efficiency of cooling system portion 8 by the high-pressure side refrigerant that cools off with refrigerant loop 9 of will flowing through with refrigerant loop 7.
In addition, though cooling is lower than from refrigerating the pressure of the refrigerant that comes out with evaporimeter 43 owing to its evaporating temperature step-down becomes with the pressure from the freezing refrigerant that comes out with evaporimeter 49 in the refrigerant loop 9, but owing to before converging, compressed by compressor 54 with the refrigerant that comes out with evaporimeter 43 from refrigeration, even when refrigerating box 3 is controlled with household freezer 4 so different the temperature inside the box, also each case can be cooled to suitable temperature, and utilize compressor 54 to make the pressure unanimity of the refrigerant that is drawn into compressor 37, move without barrier.
(2) heating of air-conditioning system portion operation
Introduce the heating operation of air-conditioning system portion below in conjunction with Fig. 2
At first, indoor air-conditioner controller 28 is when the heating operation of judging air-conditioning system portion 6 is the most suitable, the operation of warming oneself, carry predetermined data to outside air-conditioner controller 26 and master controller 56, simultaneously, the master controller 56 that receives these data is carried these data to the freezing controller 55 in outside cooling controller 32, indoor refrigeration controller 50 and indoor.
Outside air-conditioner controller 26 need according to the data that receive make refrigerant flow with refrigerating operaton the time opposite, an inlet (with the connector of separator 10) of cross valve 14 is communicated with an outlet (with the connector of accumulator 23), another inlet (with the connector that utilizes side heat exchanger 27) is communicated with another outlet (with the connector of heat source side heat exchanger 16).In addition, open expansion valve 18 fully when closing expansion valve 17 fully, make compressor 13A and 13B operation.
If compressor 13A, 3B operation, the high temperature and high pressure gas refrigerant of discharging from the discharge side of compressor 13A, 13B is fed into through cross valve 14 and utilizes side heat exchanger 27.Utilize pressure fan 15 to carry out room air in utilizing side heat exchanger 27 and ventilate, refrigerant heats and condensation room air in this heat release.Thus, carry out the heating in indoor (in the shop).
After the refrigerant of liquefaction forms low pressure (decompression) through expansion valve 18,19 in turn in utilizing side heat exchanger 27, enter the coolant path 21A of fountain U type heat exchange of heat pipe 21, after this evaporation and heat absorption, through accumulator 23, supply to the suction side of compressor 13A, 13B, so repeatedly circulation.
Outside air-conditioner controller 26 is adjusted the valve opening of expansion valve 18 and 19 according to the temperature of the refrigerant temperature of the gateway of fountain U type heat exchange of heat pipe 21 or fountain U type heat exchange of heat pipe 21, makes to become the suitable degree of superheat.In addition, indoor air-conditioner controller 28 is according to the temperature of utilizing side heat exchanger 27 and the air themperature that is inhaled into this, and control makes the temperature in indoor (in the shop) reach predefined temperature to the pressure fan 15 that utilizes side heat exchanger 27 to ventilate.
On the other hand, outside cooling controller 32 makes the cooling in the cooling system portion 8 use an inlet (with the connector of separator 31) of the cross valve 39 in refrigerant loop 9 to be communicated with an outlet (with the connector of cross valve 41), and another inlet (with the connector of fountain U type heat exchange of heat pipe 21) and another outlet (with the connector of condenser 38) are communicated with.In addition, outside cooling controller 32 makes an inlet (with the connector of cross valve 39) of cross valve 41 be communicated with an outlet (with refrigerating with evaporimeter 43 and freezing connector with evaporimeter 49 ( magnetic valve 46,47,52)), and another inlet (with the connector of storage tank 36) and another outlet (with the connector of fountain U type heat exchange of heat pipe 21) are communicated with.Make compressor 37 and 54 operations.
Thus, the high temperature and high pressure gas refrigerant of discharging from compressor 37 is fed into the coolant path 21B of fountain U type heat exchange of heat pipe 21 through cross valve 39,41.That is, the high temperature and high pressure gas refrigerant of discharging from compressor 37 situation that supplies to fountain U type heat exchange of heat pipe 21 behind the condenser 38 of flowing through during with refrigerating operaton is relative, is fed into fountain U type heat exchange of heat pipe 21 before arrival condenser 38.
The cooling that supplies to fountain U type heat exchange of heat pipe 21 is cooled off by above-mentioned air conditioning becomes low temperature with the refrigerant evaporation in refrigerant loop 7 fountain U type heat exchange of heat pipe 21 with the refrigerant utilization in the refrigerant loop 9, and then supercooling.In other words, air conditioning can be from the refrigerant draw heat of cooling with refrigerant loop 9 with the refrigerant in refrigerant loop 7.
The refrigerant of coolant path 21B by fountain U type heat exchange of heat pipe 21 flows into the entrance side 38A of condenser 38 through cross valve 39.Utilize pressure fan 35 to carry out extraneous air in this condenser 38 and ventilate, the refrigerant that enters condenser 38 is in this heat release and condensation.
The refrigerant that comes out from this condenser 38 enters in the storage tank 36, slips in this temporary transient storage, carries out gas/liquid and separates.Liquid coolant after the separation comes out from storage tank 36, by cross valve 41 back forks, a part is fork further, and another part is in turn by magnetic valve 46,47, by expansion valve 44 throttlings (decompression), supply to refrigeration evaporimeter 43, and in this evaporation, another part refrigerant behind the fork arrives expansion valve 44 by magnetic valve 46, after this is by throttling (decompression), enter another refrigeration evaporimeter 43, and in this evaporation.Utilize in evaporimeter 43 pressure fan 20 to carry out air draught circulation in the case of refrigerating box 3 respectively in each refrigeration, make by the heat-absorbing action of refrigerant evaporation that air cools off in each case.
By above-mentioned operation, even when operation is warmed oneself in air conditioning with refrigerant loop 7, air conditioning supplies to fountain U type heat exchange of heat pipe 21 with the low-pressure side refrigerant in refrigerant loop 7 by flowing through, the on high-tension side refrigerant of cooling with refrigerant loop 9 of flowing through carried out supercooling, can improve the refrigeration cooling capacity of evaporimeter 43,44 and the operational efficiency of cooling system portion 8 of refrigerating box 3 and household freezer 4.
In addition, when the heating operation, air conditioning is used the refrigerant in refrigerant loop 7 owing to use the refrigerant draw heat in refrigerant loop 9 from cooling by fountain U type heat exchange of heat pipe 21, can improve the heating ability of air-conditioning system portion 6, in a word, can realize improving to the whole efficiency of the indoor refrigeration system 1 that carries out air conditioning and refrigerating box 3 and household freezer 4 carried out cool off in the case and save energy.
Particularly can reclaim the heat extraction of this refrigerant effectively because cooling is supplied to fountain U type heat exchange of heat pipe 21 before the condenser 38 with the high-pressure side refrigerant in refrigerant loop 9 this moment, further improve the heating ability that refrigerant loop 7 is used in air conditioning.
Operation control when (3) heat is closed in the refrigerating operaton of air-conditioning system
In normal air conditioner (being equivalent to air-conditioning system portion 6), indoor temperature is substantially equal to design temperature or is lower than design temperature during refrigerating operaton, promptly, refrigeration heat is when closing, and ends the operation of compression unit (being equivalent to compression unit 13).With respect to this, when closing, the refrigeration system of this example 1 refrigeration heat under 8 operations of cooling system portion, makes compression unit 13 operations of air-conditioning system portion 6, the refrigerant of the cooling system portion 8 that flows through is carried out supercooling.
Introduce the action when refrigeration is hot closes below.
Fig. 3 and 4 is flow charts of the action during demonstration refrigeration plant heat is closed.
At first, master controller 56 judges according to the data that receive from outside cooling controller 32 whether the compression unit (compressor 37,54) of cooling system portion 8 opens (in service) (step S1), when compression unit is closed (operation stops), the valve fixed pulse Pv of expansion valve 19 is made as 0, making valve opening is 0 (full cut-off), simultaneously, the speed Fr of the compression unit 13 of air-conditioning system portion 6 is set at 0, makes compression unit 13 keep halted states (step S20).
On the other hand, when the compression unit of cooling system portion 8 starts, master controller 56 judges whether cooling system portion 8 is in (step S2) in the Defrost operation, during defrosting, transfer to the processing of above-mentioned steps S20, during non-defrosting, judge according to the data that receive from outside air-conditioner controller 26 whether compression unit 13 is in and force to stop (step S3).At this, being meant during so-called compression unit 13 is in and forces to stop to need protection compression unit 13 compression unit 13 to be remained on the state of halted state at predefined pressure stopping period (for example 3 minutes) after compression unit 13 stops fully.
When compression unit 13 is not in the pressure halted state, outside air-conditioner controller 26 is according to the indication of master controller 56, the valve fixed pulse Pv of expansion valve 19 is set at predefined initial stage pulse, the valve opening of expansion valve 19 is adjusted to initial stage aperture (step S4) from buttoned-up status.That is, in service at the compression unit of cooling system 8, under the condition of the optional halted state of the compression unit 13 of non-defrost state and air-conditioning system portion 6, open expansion valve 19, be controlled to be the initial stage aperture regularly.
Secondly, outside air-conditioner controller 26 is set at predefined initial target frequency (step S5) with the target shape frequency Fr of compression unit 13.In addition, in this example, the setting of the target speed Fr of compression unit 13 means the setting of the target speed of compressor 13A, and when this compressor 13A rotated, compressor 13B was adjusted to the speed of predefined constant rotation usefulness.
Operation by compression unit 13 make refrigerant air conditioning with refrigerant loop 7 in circulation, be inflated the coolant path 21A that refrigerant that valve 19 becomes low pressure supplies to fountain U type heat exchange of heat pipe 21.Thereby fountain U type heat exchange of heat pipe 21 is cooled by the heat-absorbing action of refrigerant evaporation, can carry out supercooling with the on high-tension side refrigerant in refrigerant loop 9 to the cooling of the coolant path 21B of the fountain U type heat exchange of heat pipe 21 of flowing through.
Secondly; outside air-conditioner controller 26 is set the SH control (step S6) of correction pulse Δ a that is used for above-mentioned temperature difference TE is formed the valve fixed pulse Pv of predefined target temperature difference SH according to the outlet temperature TE2 of air-conditioning system portion 6 side refrigerants in the fountain U type heat exchange of heat pipe 21 and the temperature difference TE between the inlet temperature TE1; and according to discharge temperature (the discharge temperature TD1 of compressor 13A of the compression unit 13 of air-conditioning system portion 6; the discharge temperature TD2 of compressor 13B), set the TD control (step S7) of the correction pulse Δ b of the valve fixed pulse Pv that is used to protect compression unit 13.In addition, this correction pulse Δ b when the discharge temperature of compression unit 13 be that set point of temperature is set when above.
In addition, outside air-conditioner controller 26 forms the predefined target temperature difference (the setting temperature difference) SC according to the inlet temperature T C1 and the temperature difference SC between the outlet temperature TC2 of the refrigerant of cooling system portion 8 sides in the fountain U type heat exchange of heat pipe 21 with above-mentioned temperature difference SC, and being used to make outlet temperature T C2 is the SC control (step 8) of the correction speed Δ C of the above compression unit 13 of ambient temperature.At this, with the outlet temperature TC2 of refrigerant form more than the ambient temperature be because since at the refrigerant pipe (Fig. 1 is expressed as γ) that connects fountain U type heat exchange of heat pipe 21 and cross valve 39 so go up and do not roll up heat-barrier material usually if the refrigerant by this refrigerant pipe is not lower than outside air temperature, then refrigerant warms, produce instant gas (Off ラ Star シ ユ ガ ス), cause thermal losses.But, when volume has heat-barrier material on this refrigerant pipe γ, in step S8, that temperature difference SC is formed the emending frequency Δ Fr that preestablishes target temperature difference SC is just passable as long as be set at, and the outlet temperature TC2 of refrigerant forms the above condition of ambient temperature and can consider.
In addition, above-mentioned target temperature difference SC can corresponding outside air temperature change.For example, if outside air temperature is the value of forming SC1 then more than 30 ℃, ambient temperature is more than 20 ℃ and the value of forming SC2 then discontented 30 ℃ the time, is discontented with the 20 ℃ of then value of forming SC3 as if ambient temperature.At this, target temperature difference SC can be made as with ambient temperature and diminish and increase, value SC1＜value SC2＜value SC3.
And, correction pulse Δ a that outside air-conditioner controller 26 will be tried to achieve in above-mentioned steps S6 and S7 and Δ b and present valve fixed pulse Pv (Pv_old) addition, calculate the value (step S9) of next control valve fixed pulse Pv, in the upper limit pulse (Pvmax) and lower limit (Pvmin) scope of expansion valve 19, set the valve fixed pulse Pv of expansion valve 19, control valve aperture (step S10).
Then, correction speed Δ c that outside air-conditioner controller 26 will be tried to achieve in above-mentioned steps S8 and present target speed Fr (Fr_old) addition calculate the Next target speed Fr (step S11) of compression unit 13.And in the scope of upper limiting frequency (Frmax) and lower frequency limit (Frmin), the rotation number of compression unit 13 is controlled to be this target speed Fr (step S12) as if the target speed Fr that is calculated.
At this, the scope of this upper limiting frequency (Frmax) and lower frequency limit (Frmin) is set at higher limit and the lower limit in the frequency range of the efficient of compression unit 13 (compressor 13A) good (efficient more than the regulation numerical value).Thereby, compression unit 13 can be controlled to be the good speed of efficient.
But, when the speed of the speed decline of satisfying compression unit 13 up to still excessive overcooled condition of the refrigerant of lower frequency limit air-conditioning system portion 6 and compression unit 13 rises up to upper limiting frequency, the refrigerant of air-conditioning system portion 6 is in still can not overcooled condition during arbitrary condition, stop the operation of compression unit 13, stop the operation of air-conditioning system portion 6.
Specifically, after step S12 handles, outside air-conditioning system portion 26 judge target speed Fr whether with lower frequency limit (step S13) unanimous on the whole, judge simultaneously target speed Fr whether with upper limiting frequency (step S14) unanimous on the whole.When judging that target speed Fr and one of lower frequency limit and upper limiting frequency are inconsistent, transfer to the processing of step S1.
When target speed Fr and lower frequency limit are unanimous on the whole, outside air-conditioning control part 26 judges whether the temperature difference SC of the gateway of the refrigerant of air-conditioning system portion 6 sides in the fountain U type heat exchange of heat pipe 21 is temperature (step S15) above than the big set point of temperature of target temperature difference SH (for example 10 ℃), if this more than temperature, then transfers to the processing of step S20.Thereby, stop compression unit 13 operations, simultaneously, the valve opening of expansion valve 19 becomes 0, stops the operation of air-conditioning system portion 6.
In addition, when target speed Fr and upper limiting frequency are unanimous on the whole, outside air-conditioning control part 26 judges whether the temperature difference SC of the gateway of the refrigerant of air-conditioning system portion 6 sides in the fountain U type heat exchange of heat pipe 21 is than the following temperature (step S16) of the low set point of temperature (for example 5 ℃) of target temperature difference SH, if this is below temperature, then transfer to the processing of step S20, stop the operation of air-conditioning system portion 6.
Outside air-conditioner controller 26 is carried out above-mentioned any and is handled the processing that all can transfer to step S1, the processing of execution in step S1～S14 or the processing of step S1～S20 repeatedly in refrigeration heat is closed.Thereby, in refrigeration heat is closed, carry out the rotation control of compression unit 13 and the valve opening control of expansion valve 19.
In addition, the above-mentioned action heat that is not limited to freeze is closed, and also can be in cooling operation back stops the state of the operation of air-conditioning system portion 6 according to the halt instruction of remote control etc., that is, carry out under the operation of air conditioner halted state behind the refrigerating operaton.
Like this, this cooling system 1 stops and during compression unit (compressor 37, the 54) operation of cooling system portion 8 when the compression unit 13 of air-conditioning system portion 6, because compression unit 13 operations with air-conditioning system portion 6, to fountain U type heat exchange of heat pipe 21 supply flows through the low-pressure side refrigerant of air conditioning, so even when refrigeration heat is closed, also can make the high-pressure side refrigerant often supercooling of cooling of flowing through with refrigerant loop 9 with refrigerant loop 7.As a result, when refrigeration heat is closed, can avoid the phenomenon of the cooling capacity reduction of cooling system portion 8, the cooling capacity of cooling system portion 8 and operational efficiency are maintained high-level state.Particularly because in refrigeration heat when closing, can further improve capacity usage ratio at the compression unit 13 of the good speed scope inner control air-conditioning system portion 6 of efficient.
In addition, the target temperature difference SC of the refrigerant inlet temperature TC1 of cooling system portion 8 sides in the fountain U type heat exchange of heat pipe 21 and the temperature difference SC between the outlet temperature TC2 is set at along with outside air temperature reduces and the value of increase.Thereby, can corresponding ambient temperature suitably adjust the supercooling degree of the refrigerant of cooling system portion 8.
In addition, in above-mentioned example, expansion valve 19 can carry out refrigerant supply with/use various motor-driven valves in the scope that stops to switch.
In addition, illustrated that in above-mentioned example the present invention is applicable to the refrigeration system in shops such as convenience store, but the refrigeration system that the present invention also can be widely used in carrying out air conditioning, the equipment of being cooled except that refrigerating box 3 and household freezer 4 is cooled off.In addition, the matched tube structure shown in the above-mentioned example etc. is not limited thereto, and in not breaking away from the present invention's spirit scope, can suitably change.
Claims (18)
1. a refrigeration system is characterized in that, comprising:
Air-conditioning system portion, it has and comprises air conditioning with compressor, heat source side heat exchanger and utilize the air conditioning of side heat exchanger to use the refrigerant loop, the operation air conditioning during with compressor by utilizing the side heat exchanger to carry out room conditioning;
Cooling system portion, it has and comprises cooling and use the refrigerant loop with the cooling of compressor, condenser and evaporimeter, carries out cooling to the equipment of being cooled by evaporimeter when cooling off with compressor operating;
Fountain U type heat exchange of heat pipe, it is used for carrying out heat exchange between described air conditioning is with the refrigerant of the low-pressure side in refrigerant loop and the on high-tension side refrigerant of described cooling with the refrigerant loop; And
Control device, it when compressor operating use in out of service and described cooling with compressor, moves described air conditioning compressor in described air conditioning, supplies with the refrigerant of the low-pressure side in described air conditioning usefulness refrigerant loop to described fountain U type heat exchange of heat pipe.
2. refrigeration system according to claim 1, it is characterized in that: described air-conditioning system portion, identical with predefined temperature or preestablish under the hot closed condition of refrigeration of temperature when following that described air conditioning stops with compressor and described cooling when using compressor operating in indoor temperature described, move described air conditioning compressor, supply with the refrigerant of described air conditioning with the low-pressure side in refrigerant loop to described fountain U type heat exchange of heat pipe.
3. refrigeration system as claimed in claim 1 or 2 is characterized in that: when refrigeration heat was closed and moved described air conditioning and uses compressor, described air conditioning was controlled in the predefined frequency range with the speed of compressor.
4. as refrigeration system as described in the claim 3, it is characterized in that: described air-conditioning system portion asks for the described cooling that is used for flowing to described fountain U type heat exchange of heat pipe and is set to the target speed of the described air conditioning of the predefined temperature difference with compressor with the inlet temperature of the on high-tension side refrigerant in refrigerant loop and the temperature difference of outlet temperature;
When this target speed is in described predefined frequency range, described air conditioning is controlled to be its target speed with the speed of compressor, and and the described temperature difference consistent with the lower frequency limit of described predefined frequency is that the set point of temperature of the described setting temperature difference is when above when speed, and the upper limiting frequency of speed and described predefined frequency is consistent and the described temperature difference is the set point of temperature of described setting temperature difference when following, ends the operation of described air conditioning with compressor.
5. as refrigeration system as described in the claim 4, it is characterized in that: described air-conditioning system portion adjusts described target speed, and making the described cooling that flows to described fountain U type heat exchange of heat pipe is more than the external air temperature with the on high-tension side outlet refrigerant temperature in refrigerant loop.
6. as refrigeration system as described in the claim 4, it is characterized in that: the corresponding external air temperature change of the described setting temperature difference.
7. as refrigeration system as described in the claim 5, it is characterized in that: the corresponding external air temperature change of the described setting temperature difference.
8. as refrigeration system as described in the claim 4, it is characterized in that: the refrigerant loop is used in described air conditioning, described heat source side heat exchanger and described utilize between the side heat exchanger first expansion valve is set in, refrigerant pipe fork between described heat source side heat exchanger and described first expansion valve, this bifurcated pipe is situated between and is connected with described fountain U type heat exchange of heat pipe by second expansion valve
The described second expansion valve control valve aperture, it is poor to make the described temperature difference become described design temperature.
9. as refrigeration system as described in the claim 5, it is characterized in that: the refrigerant loop is used in described air conditioning, described heat source side heat exchanger and described utilize between the side heat exchanger first expansion valve is set in, refrigerant pipe fork between described heat source side heat exchanger and described first expansion valve, this bifurcated pipe is situated between and is connected with described fountain U type heat exchange of heat pipe by second expansion valve
The described second expansion valve control valve aperture, it is poor to make the described temperature difference become described design temperature.
10. as refrigeration system as described in the claim 6, it is characterized in that: the refrigerant loop is used in described air conditioning, described heat source side heat exchanger and described utilize between the side heat exchanger first expansion valve is set in, refrigerant pipe fork between described heat source side heat exchanger and described first expansion valve, this bifurcated pipe is situated between and is connected with described fountain U type heat exchange of heat pipe by second expansion valve
The described second expansion valve control valve aperture, it is poor to make the described temperature difference become described design temperature.
11. as refrigeration system as described in the claim 7, it is characterized in that: the refrigerant loop is used in described air conditioning, described heat source side heat exchanger and described utilize between the side heat exchanger first expansion valve is set in, refrigerant pipe fork between described heat source side heat exchanger and described first expansion valve, this bifurcated pipe is situated between and is connected with described fountain U type heat exchange of heat pipe by second expansion valve
The described second expansion valve control valve aperture, it is poor to make the described temperature difference become described design temperature.
12. the control method of a refrigeration system, it carries out, and room air is regulated and the cooling of the equipment that is cooled, it is characterized in that, described refrigeration system has air-conditioning system portion, cooling system portion and fountain U type heat exchange of heat pipe, described air-conditioning system portion has air conditioning with compressor and comprise the heat source side heat exchanger and utilize the air conditioning of side heat exchanger to use the refrigerant loop, regulate by utilizing the side heat exchanger to carry out room air when moving air conditioning with compressor, described cooling system portion has cooling with compressor and comprise condenser and the refrigerant loop is used in the cooling of evaporimeter, operation cooling during with compressor by the be cooled cooling of equipment of evaporimeter, described fountain U type heat exchange of heat pipe is used for carrying out heat exchange between described air conditioning is with the refrigerant of the low-pressure side in refrigerant loop and the on high-tension side refrigerant of described cooling with the refrigerant loop
When compressor operating use in out of service and described cooling with compressor, move described air conditioning compressor in described air conditioning, supply with the refrigerant of the low-pressure side in described air conditioning usefulness refrigerant loop to described fountain U type heat exchange of heat pipe.
13. control method as refrigeration system as described in the claim 12, it is characterized in that: identical with predefined temperature or when using compressor operating with the out of service and described cooling of compressor for the air conditioning described in the hot closed condition of promptly freezing below the described predefined temperature when indoor temperature, move described air conditioning compressor, supply with the refrigerant of described air conditioning with the low-pressure side in refrigerant loop to described fountain U type heat exchange of heat pipe.
14. the control method as refrigeration system as described in claim 12 or 13 is characterized in that: when refrigeration heat was closed and moved described air conditioning and uses compressor, described air conditioning was controlled in the predefined frequency range with the speed of compressor.
15. control method as refrigeration system as described in the claim 14, it is characterized in that: ask for the described cooling that is used for flowing to described fountain U type heat exchange of heat pipe is set to the predefined temperature difference with the temperature difference of the inlet temperature of the on high-tension side refrigerant in refrigerant loop and outlet temperature described air conditioning with compressor target speed
When described target speed is in described predefined frequency range, described air conditioning is controlled to be its target speed with the speed of compressor, and and the described temperature difference consistent with the lower frequency limit of described predefined frequency is that the set point of temperature of the described setting temperature difference is when above when speed, and speed is consistent with the described upper limiting frequency that preestablishes frequency and the described temperature difference is the set point of temperature of described setting temperature difference when following, ends the operation of described air conditioning with compressor.
16. control method as refrigeration system as described in the claim 15, it is characterized in that: adjust described target speed, making the described cooling that flows to described fountain U type heat exchange of heat pipe is more than the external air temperature with the outlet temperature of the on high-tension side refrigerant in refrigerant loop.
17. the control method as refrigeration system as described in the claim 15 is characterized in that: the corresponding external air temperature change of the described setting temperature difference.
18., it is characterized in that: the corresponding external air temperature change of the described setting temperature difference as refrigeration system as described in the claim 16.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP283500/03 | 2003-07-31 | ||
| JP2003283500A JP4073376B2 (en) | 2003-07-31 | 2003-07-31 | Refrigeration system and control method of refrigeration system |
| JP283500/2003 | 2003-07-31 |
Publications (2)
| Publication Number | Publication Date |
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| CN1603724A CN1603724A (en) | 2005-04-06 |
| CN100427855C true CN100427855C (en) | 2008-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100921277A Expired - Fee Related CN100427855C (en) | 2003-07-31 | 2004-08-02 | Refrigerating system and its controlling method |
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| JP (1) | JP4073376B2 (en) |
| CN (1) | CN100427855C (en) |
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| CN107796142B (en) * | 2017-11-02 | 2023-07-21 | 珠海格力电器股份有限公司 | Air source heat pump system and control method thereof |
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|---|---|---|---|---|
| US4959974A (en) * | 1988-07-28 | 1990-10-02 | Diesel Kiki Co., Ltd. | Air-conditioning control system with freezing chamber-equipped refrigerator for vehicles |
| CN1046595A (en) * | 1990-06-15 | 1990-10-31 | 陈杰然 | Air-conditioner for cold-storage and freezing boxes |
| CN2116183U (en) * | 1991-07-29 | 1992-09-16 | 陈杰然 | Air conditioner of refrigerator |
| US6131401A (en) * | 1997-04-08 | 2000-10-17 | Daikin Industries, Ltd. | Refrigerating system |
| JP2002174470A (en) * | 2000-12-08 | 2002-06-21 | Daikin Ind Ltd | Freezer |
| JP2002349980A (en) * | 2001-03-23 | 2002-12-04 | Daikin Ind Ltd | Refrigeration unit |
| CN2554530Y (en) * | 2002-07-03 | 2003-06-04 | 广东科龙电器股份有限公司 | Cabinet air conditioner with freezer |
-
2003
- 2003-07-31 JP JP2003283500A patent/JP4073376B2/en not_active Expired - Fee Related
-
2004
- 2004-08-02 CN CNB2004100921277A patent/CN100427855C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4959974A (en) * | 1988-07-28 | 1990-10-02 | Diesel Kiki Co., Ltd. | Air-conditioning control system with freezing chamber-equipped refrigerator for vehicles |
| CN1046595A (en) * | 1990-06-15 | 1990-10-31 | 陈杰然 | Air-conditioner for cold-storage and freezing boxes |
| CN2116183U (en) * | 1991-07-29 | 1992-09-16 | 陈杰然 | Air conditioner of refrigerator |
| US6131401A (en) * | 1997-04-08 | 2000-10-17 | Daikin Industries, Ltd. | Refrigerating system |
| JP2002174470A (en) * | 2000-12-08 | 2002-06-21 | Daikin Ind Ltd | Freezer |
| JP2002349980A (en) * | 2001-03-23 | 2002-12-04 | Daikin Ind Ltd | Refrigeration unit |
| CN2554530Y (en) * | 2002-07-03 | 2003-06-04 | 广东科龙电器股份有限公司 | Cabinet air conditioner with freezer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4073376B2 (en) | 2008-04-09 |
| JP2005049063A (en) | 2005-02-24 |
| CN1603724A (en) | 2005-04-06 |
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