CN102331073B - Control method for ice storage multi-split air conditioning unit - Google Patents
Control method for ice storage multi-split air conditioning unit Download PDFInfo
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- CN102331073B CN102331073B CN 201110298391 CN201110298391A CN102331073B CN 102331073 B CN102331073 B CN 102331073B CN 201110298391 CN201110298391 CN 201110298391 CN 201110298391 A CN201110298391 A CN 201110298391A CN 102331073 B CN102331073 B CN 102331073B
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Abstract
The invention discloses a control method for an ice storage multi-split air conditioning unit. The method comprises an ice storage control method, an ice melting refrigeration control method and a simultaneous ice making assistance and ice melting refrigeration control method. The ice storage multi-split air conditioning unit using the control method for the ice storage multi-split air conditioning unit can realize functions of ice storage, ice melting refrigeration and simultaneous ice making assistance and ice melting refrigeration; thus, after ice in an ice storage tank of an ice storage system is completely consumed, the ice storage multi-split air conditioning unit can still realize simultaneous ice making assistance and ice melting refrigeration; and a direct current variable frequency compressor technology is adopted by the ice storage multi-split air conditioning unit, so that the energy efficiency ratio of the ice storage multi-split air conditioning unit is increased.
Description
Technical field:
The present invention relates to the air conditioner controlling technology field, specifically, is a kind of ice cold-storage combined air conditioners unit control method that can realize ice cold-storage combined air conditioners unit ice-reserving, ice-melt refrigeration, auxiliary ice making simultaneously and ice-melt refrigerating function.
Background technology:
The ice cold-storage has obtained very big development in recent years as a kind of means of effective peak load shifting.
Fig. 1 is a kind of Overcold ice cold-storage machine set system schematic diagram, and this Overcold ice cold-storage unit comprises off-premises station, ice storage system and multi-joint indoor set.Described off-premises station comprises digital scroll compressor 50 ＇, Load Regulation valve 51 ＇, and gas-liquid separator 52 ＇, four-way change-over valve 53 ＇, outdoor heat exchanger 54 ＇, check valve 55 ＇ heat electric expansion valve 56 ＇, high pressure reservoir 57 ＇.Described multi-joint indoor set comprises indoor set 59 ＇ and indoor electric expansion valve 60 ＇.Described ice storage system comprises ice storage unit 61 ＇, a closed circulation pipeline and three outer contacts, and described closed circulation pipeline is provided with sub-cooling coil 58 ＇ by described ice storage unit 61 ＇ in described ice storage unit 61 ＇.Electric expansion valve 62 ＇, first magnetic valve, 63 ＇, second magnetic valve, 64 ＇ and the 3rd magnetic valve 65 ＇ are arranged on the described closed circulation pipeline, described electric expansion valve 62 ＇ and the 65 ＇ parallel connections of the 3rd magnetic valve, and described first magnetic valve, 63 ＇ and the 64 ＇ parallel connections of second magnetic valve.First outer contact 67 ＇ of described three outer contacts are positioned at electric expansion valve 62 ＇ one side, second outer contact 68 ＇ are between the magnetic valve and ice storage unit 61 ＇ of two parallel connections, the side joint of second outer contact 68 ＇ has the 4th magnetic valve 66 ＇, and the other end of the 4th magnetic valve 66 ＇ is the 3rd outer contact 69 ＇.This Overcold ice cold-storage unit can be realized the switching of ice-reserving, ice-melt refrigerating operaton pattern.
The ice-reserving running of this Overcold ice cold-storage unit is: after the ice-reserving operating instruction sends, the 4th magnetic valve 66 ＇ open, indoor electric expansion valve 60 ＇ close, first magnetic valve, 63 ＇ and second magnetic valve, 64 ＇ close, the 3rd magnetic valve 65 ＇ close, and heating electric expansion valve 56 ＇ apertures is 480 pulses.After treating that digital scroll compressor 50 ＇ start, utilize Load Regulation valve 51 ＇ to regulate digital scroll compressor 50 ＇, high-temperature high-pressure refrigerant inlet chamber external heat exchanger 54 ＇ behind four-way change-over valve 53 ＇ that discharge from digital scroll compressor 50 ＇ this moment are condensed into the liquid cold-producing medium of HTHP, liquid refrigerant is through check valve 55 ＇ and heat electric expansion valve 56 ＇ and enter high pressure reservoir 57 ＇, the unwanted unnecessary liquid refrigerant of systemic circulation outside first contact 67 ＇ places after electric expansion valve 62 ＇ throttlings, the gas-liquid two-phase cold-producing medium that becomes low-temp low-pressure enters further evaporation among sub-cooling coil 58 ＇, and carry out heat exchange with the outer water of sub-cooling coil 58 ＇, water congeals into ice with around sub-cooling coil 58 ＇, cold-producing medium after the heat exchange becomes gaseous refrigerant contact 68 ＇ outside second of low-temp low-pressure, the 4th magnetic valve 66 ＇, the 3rd outer contact 69 ＇ and four-way change-over valve 53 ＇ enter gas-liquid separator 52 ＇, isolated gaseous refrigerant comes back to digital scroll compressor 50 ＇ in gas-liquid separator 52 ＇, carry out next ice-reserving circulation, so move in circles, finish up to the ice-reserving process.
The ice-melt refrigerating operaton process of this Overcold ice cold-storage unit is: behind the ice-reserving end of run, beginning ice-melt refrigerating operaton process, this moment, the 4th magnetic valve 66 ＇ closed, indoor electric expansion valve 60 ＇ open to initial opening, first magnetic valve, 63 ＇ and second magnetic valve, 64 ＇ close, the 3rd magnetic valve 65 ＇ open, and heating electric expansion valve 56 ＇ apertures is 480 pulses, and electric expansion valve 62 ＇ apertures are 480 pulses.After treating that digital scroll compressor 50 ＇ start, utilize Load Regulation valve 51 ＇ to regulate digital scroll compressor 50 ＇, high-temperature high-pressure refrigerant inlet chamber external heat exchanger 54 ＇ behind four-way change-over valve 53 ＇ that digital scroll compressor 50 ＇ discharge are condensed into the liquid cold-producing medium of HTHP, liquid refrigerant is through check valve 55 ＇ and heat electric expansion valve 56 ＇ and enter high pressure reservoir 57 ＇, the unwanted unnecessary liquid refrigerant of systemic circulation outside first contact 67 ＇ places behind electric expansion valve 62 ＇ and the 3rd magnetic valve 65 ＇, the liquid cold-producing medium of HTHP enters among sub-cooling coil 58 ＇ further cold excessively by the outer ice sheet of sub-cooling coil 58 ＇, become the liquid refrigerant with big supercooling degree, crossing cold-producing medium contact 68 ＇ outside second after cold arrives indoor electric expansion valve 60 ＇ and carries out throttling, become the interior evaporation of evaporimeter that the low-temp low-pressure two phase refrigerant enters indoor set 59 ＇, to flow through the air cooling of evaporimeter, regulate the temperature of air-conditioned room, low-temp low-pressure gaseous refrigerant after the evaporation contact 69 ＇ and four-way change-over valve 53 ＇ outside the 3rd enter gas-liquid separator 52 ＇, isolated gaseous refrigerant comes back to digital scroll compressor 50 ＇ in gas-liquid separator 52 ＇, carries out next kind of refrigeration cycle.So move in circles, shut down (being to shut down after temperature reaches design temperature) or hand-operated forced shutdown up to air-conditioned room to temperature.
In sum, though the control method that adopts the Overcold ice-storage air-conditioning unit of above structure to have to realize ice-reserving, can realize the control method of ice-melt refrigeration, but after the ice in the ice storage unit ran out of, this ice-storage air-conditioning unit did not then have the control method that can realize auxiliary ice making and ice-melt refrigeration simultaneously.This ice-storage air-conditioning unit adopts digital vortex formula compressor in addition, on this compressor essence, remains invariable frequency compressor, and electric efficiency is not high.
Summary of the invention:
The technical problem to be solved in the present invention is, overcomes the defective of prior art, and a kind of ice cold-storage combined air conditioners unit control method with ice-reserving, ice-melt refrigeration, auxiliary ice making simultaneously and ice-melt refrigeration control method is provided.
Technical solution of the present invention is, a kind of ice cold-storage combined air conditioners unit control method is provided, and it comprises ice-reserving control method, ice-melt refrigeration control method, auxiliary ice making and ice-melt refrigeration control method simultaneously;
Described ice-reserving control method may further comprise the steps:
(1), implements entry condition: by remote controller or line control machine or central controller or building control system unlatching ice-reserving mode signal, the ice-reserving control system is passed to the off-premises station electric-control system with starting-up signal by connection, sends start-up command by the off-premises station electric-control system;
(2), implement start-up course:
(2.1), close first magnetic valve of ice storage system, second magnetic valve of ice storage system, the 3rd magnetic valve of ice storage system, the 4th magnetic valve of unlatching ice storage system, the 5th magnetic valve of ice storage system;
(2.2), the aperture of first electric expansion valve of ice storage system is opened to 120～150 pulses of benchmark aperture;
The aperture of second electric expansion valve of ice storage system is opened to 120～150 pulses;
Close the electric expansion valve of multi-joint indoor set;
Close the blower motor of multi-joint indoor set;
Open the gas bypass unloading magnetic valve of multi-joint off-premises station;
The electric expansion valve that heats of multi-joint off-premises station is opened to 450 pulses;
Four-way change-over valve power down with multi-joint off-premises station;
Close the liquid bypass solenoid valve of multi-joint off-premises station;
Shield the low tension switch of multi-joint off-premises station;
(2.3), open time-delay after 20 seconds when the gas bypass of multi-joint off-premises station unloading magnetic valve, start the DC frequency-changeable compressor of multi-joint off-premises station;
When the DC frequency-changeable compressor running frequency of multi-joint off-premises station rises to 30Hz, move 60 seconds, rise to 64Hz from 30Hz again and continue operation;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 10 seconds, start first invariable frequency compressor of multi-joint off-premises station;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 20 seconds, start second invariable frequency compressor of multi-joint off-premises station;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 50 seconds, close the gas bypass unloading magnetic valve of multi-joint off-premises station;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 45 seconds, start the blower motor of multi-joint off-premises station;
(3), when the DC frequency-changeable compressor of multi-joint off-premises station after 100 seconds, withdraws from start-up course in the operation of 64Hz running frequency platform, enter ice-making process:
(3.1), after withdrawing from start-up course, the running frequency of the DC frequency-changeable compressor of multi-joint off-premises station is risen to 90Hz, and behind 90Hz continuous service 60min, is downconverted to 70Hz and moves 10min, return to 90Hz again behind the operation 10min and continue operation;
When the delivery temperature of the DC frequency-changeable compressor of multi-joint off-premises station is higher than 90 ℃, and when being lower than 95 ℃, the DC frequency-changeable compressor that makes multi-joint off-premises station is raising frequency at a slow speed, and raising frequency speed is 1Hz/10s;
When the delivery temperature of the DC frequency-changeable compressor of multi-joint off-premises station is higher than 95 ℃, and when being lower than 103 ℃, make the DC frequency-changeable compressor of multi-joint off-premises station keep current frequency operation;
When the DC frequency-changeable compressor delivery temperature of multi-joint off-premises station is higher than 103 ℃, and when being lower than 105 ℃, make the DC frequency-changeable compressor frequency reducing at a slow speed of multi-joint off-premises station, frequency reducing speed is 1Hz/10s;
When the delivery temperature of the DC frequency-changeable compressor of multi-joint off-premises station is higher than 105 ℃, and when being lower than 110 ℃, make the quick frequency reducing of DC frequency-changeable compressor of multi-joint off-premises station, frequency reducing speed is 1Hz/s;
When the delivery temperature of the DC frequency-changeable compressor of multi-joint off-premises station is higher than 110 ℃, and when being lower than 115 ℃, make the quick frequency reducing of DC frequency-changeable compressor of multi-joint off-premises station, frequency reducing speed is 2Hz/s;
When the delivery temperature of the DC frequency-changeable compressor of multi-joint off-premises station is higher than 115 ℃, and when continuing 10 seconds, whole ice cold-storage combined air conditioners unit is shut down 3min, and ice cold-storage combined air conditioners unit restarts and moves ice-make mode behind the 3min;
When the delivery temperature of first invariable frequency compressor of multi-joint off-premises station is higher than 120 ℃, and when continuing 10 seconds, then stop first invariable frequency compressor of multi-joint off-premises station immediately;
When the delivery temperature of first invariable frequency compressor of multi-joint off-premises station was lower than 90 ℃, first invariable frequency compressor of multi-joint off-premises station restarted;
When the delivery temperature of second invariable frequency compressor of multi-joint off-premises station is higher than 120 ℃, and when continuing 10 seconds, then stop second invariable frequency compressor of multi-joint off-premises station immediately;
When the delivery temperature of second invariable frequency compressor of multi-joint off-premises station was lower than 90 ℃, second invariable frequency compressor of multi-joint off-premises station restarted;
(3.2), setting ice making is that-15 ℃～-10 ℃, the datum target degree of superheat are 1 ℃～2 ℃ with the datum target evaporating temperature of evaporimeter (being the cold evaporation coil of mistake or the auxiliary ice maker evaporator coil pipe of ice storage system) inner refrigerant;
The setting ice making is 10～20 seconds with the accent valve cycle of electric expansion valve (being first electric expansion valve or second electric expansion valve of ice storage system);
Select delivery temperature the highest in DC frequency-changeable compressor, first invariable frequency compressor and second invariable frequency compressor of multi-joint off-premises station as the delivery temperature of estimating and judging;
When delivery temperature has ascendant trend, and during delivery temperature≤70 ℃, ice making is with evaporimeter target degree of superheat regulated quantity=0 ℃;
When delivery temperature has ascendant trend, and during delivery temperature＞100 ℃, ice making is with evaporimeter target degree of superheat regulated quantity=1 ℃～2 ℃;
When delivery temperature has downward trend, and during delivery temperature 〉=75 ℃, ice making is with evaporimeter delivery temperature target degree of superheat regulated quantity=0 ℃;
When delivery temperature has downward trend, and during delivery temperature＜65 ℃, ice making is with evaporimeter delivery temperature target degree of superheat regulated quantity=-1 ℃～-2 ℃;
Definition: the target degree of superheat=datum target degree of superheat+delivery temperature degree of superheat regulated quantity;
Ice making is transferred the valve umber of pulse with the aperture=benchmark aperture+degree of superheat of electric expansion valve;
The degree of superheat is transferred the valve umber of pulse: the different intervals according to the degree of superheat and degree of superheat variable quantity are selected, and are as shown in the table:
(4), reach the ice making set in the program during time when the ice making operation time, withdraw from ice-making process:
(4.1), close total feed pipe magnetic valve of multi-joint off-premises station;
(4.2), after the DC frequency-changeable compressor for the treatment of multi-joint off-premises station is downconverted to 30Hz and moves 10 seconds, first invariable frequency compressor 2 of multi-joint off-premises station and second invariable frequency compressor 3 are shut down, the 5th closed electromagnetic valve of first magnetic valve of ice storage system, the 4th magnetic valve of ice storage system, ice storage system, first electric expansion valve of ice storage system, second electric expansion valve of ice storage system are closed, when the low tension switch of multi-joint off-premises station was experienced the minimum pressure value, the DC frequency-changeable compressor of multi-joint off-premises station was shut down;
Described ice-melt refrigeration control method may further comprise the steps:
(1), implements entry condition: during by remote controller or line control machine or central controller or building control system unlatching refrigeration air-conditioner mode signal, the indoor set electric-control system is passed to the off-premises station electric-control system with starting-up signal by connection, sends start-up command by the off-premises station electric-control system;
(2), implement start-up course:
(2.1), close the 4th magnetic valve of ice storage system, the 5th magnetic valve of ice storage system, second magnetic valve of unlatching ice storage system, the 3rd magnetic valve of ice storage system;
(2.2), the aperture of first electric expansion valve of ice storage system is opened to 450 pulses;
The aperture of second electric expansion valve of ice storage system is opened to 450 pulses;
The aperture of the electric expansion valve of multi-joint indoor set is opened to 120～180 pulses;
Open the blower motor of multi-joint indoor set;
The aperture that heats electric expansion valve of multi-joint off-premises station is opened to 450 pulses;
Open the gas bypass unloading magnetic valve of multi-joint off-premises station;
Four-way change-over valve power down with multi-joint off-premises station;
Close the liquid bypass solenoid valve of multi-joint off-premises station;
Low tension switch shielding with multi-joint off-premises station;
(2.3), open time-delay after 20 seconds when the gas bypass of multi-joint off-premises station unloading magnetic valve, start the DC frequency-changeable compressor of multi-joint off-premises station;
When the DC frequency-changeable compressor running frequency of multi-joint off-premises station rises to 30Hz, move 60 seconds, rise to 64Hz from 30Hz again and continue operation;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 10 seconds, start first invariable frequency compressor of multi-joint off-premises station;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 20 seconds, start second invariable frequency compressor of multi-joint off-premises station;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 50 seconds, close the gas bypass unloading magnetic valve of multi-joint off-premises station;
After the DC frequency-changeable compressor of multi-joint off-premises station moves 45 seconds, start the blower motor of multi-joint off-premises station;
(3), when the DC frequency-changeable compressor of multi-joint off-premises station after 100 seconds, withdraws from start-up course in the operation of 64Hz running frequency platform, enter process of refrigerastion:
(3.1), the DC frequency-changeable compressor of multi-joint off-premises station after withdrawing from start-up course, running frequency is carried out raising frequency or frequency reducing control according to multi-joint indoor unit capability conditions of demand;
First invariable frequency compressor of multi-joint off-premises station or second invariable frequency compressor are controlled automatically according to multi-joint indoor unit capability conditions of demand, when first invariable frequency compressor of the multi-joint off-premises station of needs or second invariable frequency compressor continue operation, first invariable frequency compressor of multi-joint off-premises station or second invariable frequency compressor continue operation, when first invariable frequency compressor that does not need multi-joint off-premises station or the operation of second invariable frequency compressor, first invariable frequency compressor of multi-joint off-premises station or second invariable frequency compressor are shut down;
(3.2), the datum target evaporating temperature of setting the evaporimeter inner refrigerant of multi-joint indoor set is that 5 ℃～10 ℃, the datum target degree of superheat are 1 ℃～2 ℃;
The regulation mechanism of the electric expansion valve of multi-joint indoor set is with the step in above-mentioned " ice-reserving control method " " (3.2) in (3) ";
(4), when all room conditioning room temperatures reach design temperature, perhaps forced stoppage, then process of refrigerastion finishes:
(4.1), close total feed pipe magnetic valve of multi-joint indoor set;
(4.2), after the DC frequency-changeable compressor of multi-joint indoor set is downconverted to 30Hz and moves 10 seconds, first invariable frequency compressor of multi-joint indoor set or second invariable frequency compressor are shut down, second magnetic valve of ice storage system, the 3rd closed electromagnetic valve of ice storage system; When the low tension switch of multi-joint indoor set was experienced the minimum pressure value, the DC frequency-changeable compressor of multi-joint indoor set was shut down;
Described auxiliary ice making simultaneously and ice-melt refrigeration control method may further comprise the steps:
The deglaciating consumption when needing ice making again, continues to open ice-making process under the prerequisite of operation at ice cold-storage combined air conditioners unit fully in the Ice Storage Tank of ice storage system;
At this moment, the 4th magnetic valve of ice storage system is opened, and the aperture of second electric expansion valve of ice storage system is opened to 120～150 pulses;
The datum target evaporating temperature of setting the auxiliary ice maker evaporator coil pipe inner refrigerant of ice storage system is that-15 ℃～-10 ℃, the datum target degree of superheat are 1 ℃～2 ℃;
The accent valve cycle of setting second electric expansion valve is 10～20 seconds;
The aperture of second electric expansion valve=benchmark aperture+degree of superheat is transferred the valve umber of pulse;
The degree of superheat is transferred the valve umber of pulse: the different intervals according to the degree of superheat and degree of superheat variable quantity are selected, and are as shown in the table:
Ice cold-storage combined air conditioners unit control method of the present invention has the control method of ice-reserving, ice-melt refrigeration, auxiliary ice making simultaneously and ice-melt refrigeration, make ice cold-storage combined air conditioners unit have the function of ice-reserving, ice-melt refrigeration, auxiliary ice making simultaneously and ice-melt refrigeration, after deglaciating in the Ice Storage Tank of ice storage system consumes fully like this, ice cold-storage combined air conditioners unit still can realize assisting simultaneously ice making and ice-melt refrigeration, and ice cold-storage combined air conditioners unit adopts the DC frequency-changeable compressor technology, has improved the Energy Efficiency Ratio of ice cold-storage combined air conditioners unit.
Description of drawings:
Fig. 1 is the principle schematic of prior art Overcold ice cold-storage unit.
The principle schematic of Fig. 2 for adopting the present invention to ice the ice cold-storage combined air conditioners unit of cold-storage combined air conditioners unit control method.
Fig. 3 is the principle enlarged diagram of the primary module of the multi-joint off-premises station among Fig. 2.
Fig. 4 is ice storage system among Fig. 2 and the principle enlarged diagram of multi-joint indoor set.
The specific embodiment:
The present invention is further detailed explanation below in conjunction with the specific embodiment and accompanying drawing.
Shown in Fig. 2 to 4, the ice cold-storage combined air conditioners unit that adopts the present invention to ice cold-storage combined air conditioners unit control method comprises multi-joint off-premises station, ice storage system and multi-joint indoor set.
Described multi-joint off-premises station is made up of the equal modules of four parallel connections, and wherein module has the branch of primary module and submodule, and submodule is controlled by primary module, and the module of described four parallel connections is made up of a primary module and three submodules.
Each module includes: DC frequency-changeable compressor 1, first invariable frequency compressor 2, second invariable frequency compressor 3, oil return capillary 4, compressor air-discharging check valve 5, blast pipe compiles threeway 6, gs-oil separator 7, gs-oil separator outlet check valve 8, high-voltage switch gear 9, gas bypass unloading magnetic valve 10, four-way change-over valve 11, outdoor heat exchanger 12, outdoor fan motor 13, Y-type three way type 14, heat electric expansion valve 15, bypass check valve 16, high pressure reservoir 17, liquid bypass solenoid valve 18, liquid bypass capillary 19, total feed pipe magnetic valve 20, total return-air stop valve 21, total feed flow stop valve 22, liquid pipe branch pipe 23, tracheorrhaphy manifold 24, gas-liquid separator 42, low tension switch 43.
The connected mode of described primary module and submodule is parallel connection type, and namely total feed pipe of all modules is connected by liquid pipe branch pipe 23, and total muffler is connected by tracheorrhaphy manifold 24.
Described DC frequency-changeable compressor 1, first invariable frequency compressor 2, second invariable frequency compressor 3 are connected in parallel and mainly are, blast pipe is connected in parallel, and muffler is connected in parallel.
Described gas bypass unloading magnetic valve 10 is connected between gs-oil separator 7 outlets and gas-liquid separator 42 inlet tubes, and it mainly acts on and is, the pressure of balance high-pressure side and low-pressure side when unit is started shooting preceding and shutdown; When compressor exhaust temperature is too high, open gas bypass unloading magnetic valve 10, to reduce compressor exhaust temperature; When the compressor air suction hypotony, open gas bypass unloading magnetic valve 10, to improve compressor return air pressure.
Described liquid bypass solenoid valve 18 and liquid bypass capillary 19 are connected between high pressure reservoir 17 outlets and gas-liquid separator 42 inlet tubes.It mainly acts on, and when compressor exhaust temperature is too high, opens liquid bypass solenoid valve 18, to reduce compressor exhaust temperature; When the compressor air suction hypotony, open liquid bypass solenoid valve 18, to improve compressor return air pressure.
Described oil return capillary 4 is connected between gs-oil separator 7 bottoms and the associated compressors muffler.It mainly acts on, and isolated lubricating oil in the gs-oil separator 7 is drawn back the compressor muffler, avoids the compressor oil starvation.
Described total feed pipe magnetic valve 20 is installed on total feed pipe, and its effect is to close when this module is shut down, and prevents that the high-pressure refrigerant of the module of other operation from flowing back in this module.
Describedly heat electric expansion valve 15 and 16 parallel connections of bypass check valve, during the refrigeration mode operation, the high pressure, high temperature refrigerant of outdoor heat exchanger 12 condensations is through heating electric expansion valve 15 and bypass check valve 16 enters in the high pressure reservoir 17; When heating mode moved, the liquid refrigerant that is come out by high pressure reservoir 17 can only still can not pass through bypass check valve 16 by heating electric expansion valve 15 throttling cooling and step-downs.
Described high-voltage switch gear 9 is installed on the outlet of gs-oil separator 7, and its effect is control unit high pressure, prevents that the pipe-line system internal pressure is too high and the danger of booster takes place.
Described low tension switch 43 is installed on the muffler of DC frequency-changeable compressor 1, and its effect is to prevent system pipeline mesolow side, and particularly compressor return air pipe place low pressure is low excessively.
Described ice storage system comprises: branch pipe 41, first electric expansion valve 25, first magnetic valve 26, the 4th magnetic valve 27, second electric expansion valve 28, check valve 29, Ice Storage Tank 30, water supply electromagnetic valve 31, ball-cock assembly 32, the cold evaporation coil 33 of mistake, auxiliary ice maker evaporator coil pipe 34, the 5th magnetic valve 35, second magnetic valve 36, the 3rd magnetic valve 37.
Described ice storage system is made up of big supercooling degree system and auxiliary ice-making system.
Described big supercooling degree system comprises: first electric expansion valve 25, first magnetic valve 26, cross cold evaporation coil 33, the 5th magnetic valve 35, second magnetic valve 36, the 3rd magnetic valve 37.When the ice making operation pattern, first magnetic valve 26 cuts out, by the 25 throttling ice makings of first electric expansion valve.When the refrigeration air-conditioner mode operation, first magnetic valve 26 is opened, and first electric expansion valve 25 is opened to maximum opening 500 pulses, and the 5th magnetic valve 35 cuts out, and second magnetic valve 36 and the 3rd magnetic valve 37 are opened, and cold-producing medium is further cold excessively in crossing cold evaporation coil 33.
Described auxiliary ice-making system comprises: the 4th magnetic valve 27, second electric expansion valve 28, auxiliary ice maker evaporator coil pipe 34, the 5th magnetic valve 35.When ice-make mode was moved, the 4th magnetic valve 27 was opened, by the 28 throttling ice makings of second electric expansion valve; When heating mode or refrigeration air-conditioner mode operation, the 4th magnetic valve 27 cuts out, and second electric expansion valve 28 is closed.
Described ball-cock assembly 32 is installed in the water surface elevation places that set in the Ice Storage Tank 30, and its effect is to keep water level in the Ice Storage Tank 30 at desired location.When the water surface in the Ice Storage Tank 30 descends, inspire ball-cock assembly 32 actions, and signal is issued water supply electromagnetic valve 31, impel water supply electromagnetic valve 31 to open, to Ice Storage Tank 30 interior water fillings, reach designated water level until water level.
The cold evaporation coil 33 of described mistake and 34 coilings in parallel of auxiliary ice maker evaporator coil pipe, interval 30mm～40mm between the heat exchanger tube outside wall surface.
Described multi-joint indoor set comprises: the electric expansion valve 39 of indoor set 38, multi-joint indoor set.Ability size and the quantity of described indoor set 38 decide according to air-conditioned room load character and air-conditioning area.
Three compressors of the primary module of multi-joint off-premises station have one in above embodiment be the DC frequency-changeable compressor, can also have two even three all to be DC frequency-changeable compressor.Be the DC frequency-changeable compressor and three compressors of the submodule of multi-joint off-premises station have one in above embodiment, can also have two even three all to be DC frequency-changeable compressor, also can three be invariable frequency compressor entirely.According to multi-joint off-premises station ability size, in above embodiment, adopt the compressor of three parallel connections in addition, can also adopt the compressor of 2 parallel connections.
Ice cold-storage combined air conditioners unit control method of the present invention, it comprises ice-reserving control method, ice-melt refrigeration control method, auxiliary ice making and ice-melt refrigeration control method simultaneously.
Described ice-reserving control method may further comprise the steps:
(1), implements entry condition: by remote controller or line control machine or central controller or building control system unlatching ice-reserving mode signal, the ice-reserving control system is passed to the off-premises station electric-control system with starting-up signal by connection, sends start-up command by the off-premises station electric-control system.Experience Ice Storage Tank 30 middle water levels when deficiency when ball-cock assembly 32 this moment, opens water supply electromagnetic valve 31, and water filling in the Ice Storage Tank is in full-water level until Ice Storage Tank 30 middle water levels.
(2), implement start-up course:
(2.1), close first magnetic valve 26 of ice storage system, second magnetic valve 36 of ice storage system, the 3rd magnetic valve 37 of ice storage system, the 4th magnetic valve 27 of unlatching ice storage system, the 5th magnetic valve 35 of ice storage system.
(2.2), the aperture of first electric expansion valve 25 of ice storage system is opened to 120～150 pulses of benchmark aperture;
The aperture of second electric expansion valve 28 of ice storage system is opened to 120～150 pulses;
Close the electric expansion valve 39 of multi-joint indoor set;
Close the blower motor of multi-joint indoor set;
Open the gas bypass unloading magnetic valve 10 of multi-joint off-premises station;
The electric expansion valve 15 that heats of multi-joint off-premises station is opened to 450 pulses;
Four-way change-over valve 11 power down with multi-joint off-premises station;
Close the liquid bypass solenoid valve 18 of multi-joint off-premises station;
Shield the low tension switch 43 of multi-joint off-premises station.
(2.3), open time-delay after 20 seconds when the gas bypass of multi-joint off-premises station unloading magnetic valve 10, start the DC frequency-changeable compressor 1 of multi-joint off-premises station;
When DC frequency-changeable compressor 1 running frequency of multi-joint off-premises station rises to 30Hz, move 60 seconds, rise to 64Hz from 30Hz again and continue operation;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 10 seconds, start first invariable frequency compressor 2 of multi-joint off-premises station;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 20 seconds, start second invariable frequency compressor 3 of multi-joint off-premises station;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 50 seconds, close the gas bypass unloading magnetic valve 10 of multi-joint off-premises station;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 45 seconds, start the blower motor 13 of multi-joint off-premises station.
(3), when the DC frequency-changeable compressor 1 of multi-joint off-premises station after 100 seconds, withdraws from start-up course in the operation of 64Hz running frequency platform, enter ice-making process:
(3.1), after withdrawing from start-up course, the running frequency of the DC frequency-changeable compressor 1 of multi-joint off-premises station is risen to 90Hz, and behind 90Hz continuous service 60min, is downconverted to 70Hz and moves 10min, return to 90Hz again behind the operation 10min and continue operation;
When the delivery temperature of the DC frequency-changeable compressor 1 of multi-joint off-premises station is higher than 90 ℃, and when being lower than 95 ℃, the DC frequency-changeable compressor 1 that makes multi-joint off-premises station is raising frequency at a slow speed, and raising frequency speed is 1Hz/10s;
When the delivery temperature of the DC frequency-changeable compressor 1 of multi-joint off-premises station is higher than 95 ℃, and when being lower than 103 ℃, make the DC frequency-changeable compressor 1 of multi-joint off-premises station keep current frequency operation;
When DC frequency-changeable compressor 1 delivery temperature of multi-joint off-premises station is higher than 103 ℃, and when being lower than 105 ℃, make DC frequency-changeable compressor 1 frequency reducing at a slow speed of multi-joint off-premises station, frequency reducing speed is 1Hz/10s;
When the delivery temperature of the DC frequency-changeable compressor 1 of multi-joint off-premises station is higher than 105 ℃, and when being lower than 110 ℃, make the DC frequency-changeable compressor 1 quick frequency reducing of multi-joint off-premises station, frequency reducing speed is 1Hz/s;
When the delivery temperature of the DC frequency-changeable compressor 1 of multi-joint off-premises station is higher than 110 ℃, and when being lower than 115 ℃, make the DC frequency-changeable compressor 1 quick frequency reducing of multi-joint off-premises station, frequency reducing speed is 2Hz/s;
When the delivery temperature of the DC frequency-changeable compressor 1 of multi-joint off-premises station is higher than 115 ℃, and when continuing 10 seconds, whole ice cold-storage combined air conditioners unit is shut down 3min, and ice cold-storage combined air conditioners unit restarts and moves ice-make mode behind the 3min;
When the delivery temperature of first invariable frequency compressor 2 of multi-joint off-premises station is higher than 120 ℃, and when continuing 10 seconds, then stop first invariable frequency compressor 2 of multi-joint off-premises station immediately;
When the delivery temperature of first invariable frequency compressor 2 of multi-joint off-premises station was lower than 90 ℃, first invariable frequency compressor 2 of multi-joint off-premises station restarted;
When the delivery temperature of second invariable frequency compressor 3 of multi-joint off-premises station is higher than 120 ℃, and when continuing 10 seconds, then stop second invariable frequency compressor 3 of multi-joint off-premises station immediately;
When the delivery temperature of second invariable frequency compressor 3 of multi-joint off-premises station was lower than 90 ℃, second invariable frequency compressor 3 of multi-joint off-premises station restarted.
(3.2), setting ice making is that-15 ℃～-10 ℃, the datum target degree of superheat are 1 ℃～2 ℃ with the datum target evaporating temperature of evaporimeter (being the cold evaporation coil 33 of mistake or the auxiliary ice maker evaporator coil pipe 34 of ice storage system) inner refrigerant;
The setting ice making is 10～20 seconds with the accent valve cycle of electric expansion valve (being first electric expansion valve 25 or second electric expansion valve 28 of ice storage system);
Select delivery temperature the highest in DC frequency-changeable compressor 1, first invariable frequency compressor 2 and second invariable frequency compressor 3 of multi-joint off-premises station as the delivery temperature of estimating and judging;
When delivery temperature has ascendant trend, and during delivery temperature≤70 ℃, ice making is with evaporimeter target degree of superheat regulated quantity=0 ℃;
When delivery temperature has ascendant trend, and during delivery temperature＞100 ℃, ice making is with evaporimeter target degree of superheat regulated quantity=1 ℃～2 ℃;
When delivery temperature has downward trend, and during delivery temperature 〉=75 ℃, ice making is with evaporimeter delivery temperature target degree of superheat regulated quantity=0 ℃;
When delivery temperature has downward trend, and during delivery temperature＜65 ℃, ice making is with evaporimeter delivery temperature target degree of superheat regulated quantity=-1 ℃～-2 ℃.
Definition: the target degree of superheat=datum target degree of superheat+delivery temperature degree of superheat regulated quantity;
Ice making is transferred the valve umber of pulse with the aperture=benchmark aperture+degree of superheat of electric expansion valve;
The degree of superheat is transferred the valve umber of pulse: the different intervals according to the degree of superheat and degree of superheat variable quantity are selected, and are as shown in the table:
(3.3), the extension set motor 13 of multi-joint off-premises station is controlled automatically according to the temperature in the coil pipe of outdoor heat exchanger 12 and outdoor environment temperature.
(4), reach the ice making set in the program during time when the ice making operation time, withdraw from ice-making process:
(4.1), close total feed pipe magnetic valve 20 of multi-joint off-premises station.
(4.2), after the DC frequency-changeable compressor 1 for the treatment of multi-joint off-premises station is downconverted to 30Hz and moves 10 seconds; first invariable frequency compressor 2 of multi-joint off-premises station and second invariable frequency compressor 3 are shut down; the 5th magnetic valve 35 of first magnetic valve 26 of ice storage system, the 4th magnetic valve 27 of ice storage system, ice storage system cuts out; first electric expansion valve 25 of ice storage system, second electric expansion valve 28 of ice storage system are closed; when the low tension switch 43 of multi-joint off-premises station was experienced the minimum pressure value, the DC frequency-changeable compressor 1 of multi-joint off-premises station was shut down.
Described ice-melt refrigeration control method may further comprise the steps:
(1), implements entry condition: during by remote controller or line control machine or central controller or building control system unlatching refrigeration air-conditioner mode signal, the indoor set electric-control system is passed to the off-premises station electric-control system with starting-up signal by connection, sends start-up command by the off-premises station electric-control system.
(2), implement start-up course:
(2.1), close the 4th magnetic valve 27 of ice storage system, the 5th magnetic valve 35 of ice storage system, second magnetic valve 36 of unlatching ice storage system, the 3rd magnetic valve 37 of ice storage system.
(2.2), the aperture of first electric expansion valve 25 of ice storage system is opened to 450 pulses;
The aperture of second electric expansion valve 28 of ice storage system is opened to 450 pulses;
The aperture of the electric expansion valve 39 of multi-joint indoor set is opened to 120～180 pulses;
Open the blower motor of multi-joint indoor set;
The aperture that heats electric expansion valve 15 of multi-joint off-premises station is opened to 450 pulses;
Open the gas bypass unloading magnetic valve 10 of multi-joint off-premises station;
Four-way change-over valve 11 power down with multi-joint off-premises station;
Close the liquid bypass solenoid valve 18 of multi-joint off-premises station;
Low tension switch 43 shieldings with multi-joint off-premises station.
(2.3), open time-delay after 20 seconds when the gas bypass of multi-joint off-premises station unloading magnetic valve 10, start the DC frequency-changeable compressor 1 of multi-joint off-premises station;
When DC frequency-changeable compressor 1 running frequency of multi-joint off-premises station rises to 30Hz, move 60 seconds, rise to 64Hz from 30Hz again and continue operation;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 10 seconds, start first invariable frequency compressor 2 of multi-joint off-premises station;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 20 seconds, start second invariable frequency compressor 3 of multi-joint off-premises station;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 50 seconds, close the gas bypass unloading magnetic valve 10 of multi-joint off-premises station;
After the DC frequency-changeable compressor 1 of multi-joint off-premises station moves 45 seconds, start the blower motor 13 of multi-joint off-premises station.
(3), when the DC frequency-changeable compressor 1 of multi-joint off-premises station after 100 seconds, withdraws from start-up course in the operation of 64Hz running frequency platform, enter process of refrigerastion:
(3.1), the DC frequency-changeable compressor 1 of multi-joint off-premises station after withdrawing from start-up course, running frequency is carried out raising frequency or frequency reducing control according to multi-joint indoor unit capability conditions of demand;
First invariable frequency compressor 2 or second invariable frequency compressor 3 of multi-joint off-premises station are controlled automatically according to multi-joint indoor unit capability conditions of demand; when first invariable frequency compressor 2 of the multi-joint off-premises station of needs or second invariable frequency compressor 3 continue operation; first invariable frequency compressor 2 of multi-joint off-premises station or second invariable frequency compressor 3 continue operation; when first invariable frequency compressor 2 that does not need multi-joint off-premises station or 3 operations of second invariable frequency compressor, first invariable frequency compressor 2 of multi-joint off-premises station or second invariable frequency compressor 3 are shut down.
(3.2), the datum target evaporating temperature of setting the evaporimeter inner refrigerant of multi-joint indoor set is that 5 ℃～10 ℃, the datum target degree of superheat are 1 ℃～2 ℃;
The regulation mechanism of the electric expansion valve 39 of multi-joint indoor set is with the step in above-mentioned " ice-reserving control method " " (3.2) in (3) ".
(4), when all room conditioning room temperatures reach design temperature, perhaps forced stoppage, then process of refrigerastion finishes:
(4.1), close total feed pipe magnetic valve 20 of multi-joint indoor set.
(4.2), after the DC frequency-changeable compressor of multi-joint indoor set is downconverted to 30Hz and moves 10 seconds, first invariable frequency compressor 2 of multi-joint indoor set or second invariable frequency compressor 3 are shut down, and second magnetic valve 36 of ice storage system, the 3rd magnetic valve 37 of ice storage system are closed; When the low tension switch 43 of multi-joint indoor set was experienced the minimum pressure value, the DC frequency-changeable compressor of multi-joint indoor set (1) was shut down.
Described auxiliary ice making simultaneously and ice-melt refrigeration control method may further comprise the steps:
The deglaciating consumption when needing ice making again, continues to open ice-making process under the prerequisite of operation at ice cold-storage combined air conditioners unit fully in the Ice Storage Tank 30 of ice storage system.
At this moment, the 4th magnetic valve 27 of ice storage system is opened, and the aperture of second electric expansion valve 28 of ice storage system is opened to 150 pulses.
The datum target evaporating temperature of setting auxiliary ice maker evaporator coil pipe 34 inner refrigerants of ice storage system is 1 ℃ for-10 ℃, the datum target degree of superheat.
The accent valve cycle of setting second electric expansion valve 28 of ice storage system is 10 seconds.
The aperture of second electric expansion valve 28 of ice storage system=benchmark aperture+degree of superheat is transferred the valve umber of pulse.
The degree of superheat is transferred the valve umber of pulse: the different intervals according to the degree of superheat and degree of superheat variable quantity are selected, and are as shown in the table:
Claims (1)
1. an ice cold-storage combined air conditioners unit control method is characterized in that, it comprises ice-reserving control method, ice-melt refrigeration control method, auxiliary ice making and ice-melt refrigeration control method simultaneously;
Described ice-reserving control method may further comprise the steps:
(1), implements entry condition: by remote controller or line control machine or central controller or building control system unlatching ice-reserving mode signal, the ice-reserving control system is passed to the off-premises station electric-control system with starting-up signal by connection, sends start-up command by the off-premises station electric-control system;
(2), implement start-up course:
(2.1), close first magnetic valve (26) of ice storage system, second magnetic valve (36) of ice storage system, the 3rd magnetic valve (37) of ice storage system, the 4th magnetic valve (27) of unlatching ice storage system, the 5th magnetic valve (35) of ice storage system;
(2.2), the aperture of first electric expansion valve (25) of ice storage system is opened to 120～150 pulses of benchmark aperture;
The aperture of second electric expansion valve (28) of ice storage system is opened to 120～150 pulses;
Close the electric expansion valve (39) of multi-joint indoor set;
Close the blower motor of multi-joint indoor set;
Open the gas bypass unloading magnetic valve (10) of multi-joint off-premises station;
The electric expansion valve (15) that heats of multi-joint off-premises station is opened to 450 pulses;
Four-way change-over valve (11) power down with multi-joint off-premises station;
Close the liquid bypass solenoid valve (18) of multi-joint off-premises station;
Shield the low tension switch (43) of multi-joint off-premises station;
(2.3), open time-delay after 20 seconds when the gas bypass of multi-joint off-premises station unloading magnetic valve (10), start the DC frequency-changeable compressor (1) of multi-joint off-premises station;
When the DC frequency-changeable compressor (1) of multi-joint off-premises station when running frequency rises to 30Hz, move 60 seconds, rise to 64Hz from 30Hz again and continue operation;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 10 seconds, start first invariable frequency compressor (2) of multi-joint off-premises station;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 20 seconds, start second invariable frequency compressor (3) of multi-joint off-premises station;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 50 seconds, close the gas bypass unloading magnetic valve (10) of multi-joint off-premises station;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 45 seconds, start the blower motor (13) of multi-joint off-premises station;
(3), when the DC frequency-changeable compressor (1) of multi-joint off-premises station withdraws from start-up course in operation under the 64Hz running frequency after 100 seconds, enter ice-making process:
(3.1), after withdrawing from start-up course, the running frequency of the DC frequency-changeable compressor (1) of multi-joint off-premises station is risen to 90Hz, and behind 90Hz continuous service 60min, is downconverted to 70Hz and moves 10min, return to 90Hz again behind the operation 10min and continue operation;
When the delivery temperature of the DC frequency-changeable compressor (1) of multi-joint off-premises station is higher than 90 ℃, and when being lower than 95 ℃, the DC frequency-changeable compressor (1) that makes multi-joint off-premises station is raising frequency at a slow speed, and raising frequency speed is 1Hz/10s;
When the delivery temperature of the DC frequency-changeable compressor (1) of multi-joint off-premises station is higher than 95 ℃, and when being lower than 103 ℃, make the DC frequency-changeable compressor (1) of multi-joint off-premises station keep current frequency operation;
When DC frequency-changeable compressor (1) delivery temperature of multi-joint off-premises station is higher than 103 ℃, and when being lower than 105 ℃, make DC frequency-changeable compressor (1) frequency reducing at a slow speed of multi-joint off-premises station, frequency reducing speed is 1Hz/10s;
When the delivery temperature of the DC frequency-changeable compressor (1) of multi-joint off-premises station is higher than 105 ℃, and when being lower than 110 ℃, make DC frequency-changeable compressor (1) frequency reducing fast of multi-joint off-premises station, frequency reducing speed is 1Hz/s;
When the delivery temperature of the DC frequency-changeable compressor (1) of multi-joint off-premises station is higher than 110 ℃, and when being lower than 115 ℃, make DC frequency-changeable compressor (1) frequency reducing fast of multi-joint off-premises station, frequency reducing speed is 2Hz/s;
When the delivery temperature of the DC frequency-changeable compressor (1) of multi-joint off-premises station is higher than 115 ℃, and when continuing 10 seconds, whole ice cold-storage combined air conditioners unit is shut down 3min, and ice cold-storage combined air conditioners unit restarts and moves ice-make mode behind the 3min;
When the delivery temperature of first invariable frequency compressor (2) of multi-joint off-premises station is higher than 120 ℃, and when continuing 10 seconds, then stop first invariable frequency compressor (2) of multi-joint off-premises station immediately;
When the delivery temperature of first invariable frequency compressor (2) of multi-joint off-premises station was lower than 90 ℃, first invariable frequency compressor (2) of multi-joint off-premises station restarted;
When the delivery temperature of second invariable frequency compressor (3) of multi-joint off-premises station is higher than 120 ℃, and when continuing 10 seconds, then stop second invariable frequency compressor (3) of multi-joint off-premises station immediately;
When the delivery temperature of second invariable frequency compressor (3) of multi-joint off-premises station was lower than 90 ℃, second invariable frequency compressor (3) of multi-joint off-premises station restarted;
(3.2), setting ice making is that-15 ℃～-10 ℃, the datum target degree of superheat are 1 ℃～2 ℃ with the datum target evaporating temperature of evaporimeter inner refrigerant;
The setting ice making is 10～20 seconds with the accent valve cycle of electric expansion valve;
Select delivery temperature the highest in DC frequency-changeable compressor (1), first invariable frequency compressor (2) and second invariable frequency compressor (3) of multi-joint off-premises station as the delivery temperature of estimating and judging;
When delivery temperature has ascendant trend, and during delivery temperature≤70 ℃, ice making is with evaporimeter target degree of superheat regulated quantity=0 ℃;
When delivery temperature has ascendant trend, and during delivery temperature＞100 ℃, ice making is with evaporimeter target degree of superheat regulated quantity=1 ℃～2 ℃;
When delivery temperature has downward trend, and during delivery temperature 〉=75 ℃, ice making is with evaporimeter delivery temperature target degree of superheat regulated quantity=0 ℃;
When delivery temperature has downward trend, and during delivery temperature＜65 ℃, ice making is with evaporimeter delivery temperature target degree of superheat regulated quantity=-1 ℃～-2 ℃;
Definition: the target degree of superheat=datum target degree of superheat+delivery temperature degree of superheat regulated quantity;
Ice making is transferred the valve umber of pulse with the aperture=benchmark aperture+degree of superheat of electric expansion valve;
The degree of superheat is transferred the valve umber of pulse: the different intervals according to the degree of superheat and degree of superheat variable quantity are selected, and are as shown in the table:
(4), reach the ice making set in the program during time when the ice making operation time, withdraw from ice-making process:
(4.1), close total feed pipe magnetic valve (20) of multi-joint off-premises station;
(4.2), after the DC frequency-changeable compressor (1) for the treatment of multi-joint off-premises station is downconverted to 30Hz and moves 10 seconds, first invariable frequency compressor (2) of multi-joint off-premises station and second invariable frequency compressor (3) are shut down, first magnetic valve (26) of ice storage system, the 4th magnetic valve (27) of ice storage system, the 5th magnetic valve (35) of ice storage system cuts out, first electric expansion valve (25) of ice storage system, second electric expansion valve (28) of ice storage system is closed, when the low tension switch (43) of multi-joint off-premises station was experienced the minimum pressure value, the DC frequency-changeable compressor of multi-joint off-premises station (1) was shut down;
Described ice-melt refrigeration control method may further comprise the steps:
(1), implements entry condition: during by remote controller or line control machine or central controller or building control system unlatching refrigeration air-conditioner mode signal, the indoor set electric-control system is passed to the off-premises station electric-control system with starting-up signal by connection, sends start-up command by the off-premises station electric-control system;
(2), implement start-up course:
(2.1), close the 4th magnetic valve (27) of ice storage system, the 5th magnetic valve (35) of ice storage system, second magnetic valve (36) of unlatching ice storage system, the 3rd magnetic valve (37) of ice storage system;
(2.2), the aperture of first electric expansion valve (25) of ice storage system is opened to 450 pulses;
The aperture of second electric expansion valve (28) of ice storage system is opened to 450 pulses;
The aperture of the electric expansion valve (39) of multi-joint indoor set is opened to 120～180 pulses;
Open the blower motor of multi-joint indoor set;
The aperture that heats electric expansion valve (15) of multi-joint off-premises station is opened to 450 pulses;
Open the gas bypass unloading magnetic valve (10) of multi-joint off-premises station;
Four-way change-over valve (11) power down with multi-joint off-premises station;
Close the liquid bypass solenoid valve (18) of multi-joint off-premises station;
Low tension switch (43) shielding with multi-joint off-premises station;
(2.3), open time-delay after 20 seconds when the gas bypass of multi-joint off-premises station unloading magnetic valve (10), start the DC frequency-changeable compressor (1) of multi-joint off-premises station;
When the DC frequency-changeable compressor (1) of multi-joint off-premises station when running frequency rises to 30Hz, move 60 seconds, rise to 64Hz from 30Hz again and continue operation;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 10 seconds, start first invariable frequency compressor (2) of multi-joint off-premises station;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 20 seconds, start second invariable frequency compressor (3) of multi-joint off-premises station;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 50 seconds, close the gas bypass unloading magnetic valve (10) of multi-joint off-premises station;
After the DC frequency-changeable compressor (1) of multi-joint off-premises station moves 45 seconds, start the blower motor (13) of multi-joint off-premises station;
(3), when the DC frequency-changeable compressor (1) of multi-joint off-premises station withdraws from start-up course in operation under the 64Hz running frequency after 100 seconds, enter process of refrigerastion:
(3.1), the DC frequency-changeable compressor (1) of multi-joint off-premises station after withdrawing from start-up course, running frequency is carried out raising frequency or frequency reducing control according to multi-joint indoor unit capability conditions of demand;
First invariable frequency compressor (2) or second invariable frequency compressor (3) of multi-joint off-premises station are controlled automatically according to multi-joint indoor unit capability conditions of demand, when first invariable frequency compressor (2) of the multi-joint off-premises station of needs or second invariable frequency compressor (3) continue operation, first invariable frequency compressor (2) of multi-joint off-premises station or second invariable frequency compressor (3) continue operation, when first invariable frequency compressor (2) that does not need multi-joint off-premises station or second invariable frequency compressor (3) operation, first invariable frequency compressor (2) of multi-joint off-premises station or second invariable frequency compressor (3) are shut down;
(3.2), the datum target evaporating temperature of setting the evaporimeter inner refrigerant of multi-joint indoor set is that 5 ℃～10 ℃, the datum target degree of superheat are 1 ℃～2 ℃;
Set 10～20 seconds accent valve cycles of the electric expansion valve (39) of multi-joint indoor set;
The regulation mechanism of the electric expansion valve of multi-joint indoor set (39) is with the step in above-mentioned " ice-reserving control method " " (3.2) in (3) ";
(4), when all room conditioning room temperatures reach design temperature, perhaps forced stoppage, then process of refrigerastion finishes:
(4.1), close total feed pipe magnetic valve (20) of multi-joint indoor set;
(4.2), after the DC frequency-changeable compressor of multi-joint indoor set is downconverted to 30Hz and moves 10 seconds, first invariable frequency compressor (2) of multi-joint indoor set or second invariable frequency compressor (3) are shut down, and second magnetic valve (36) of ice storage system, the 3rd magnetic valve (37) of ice storage system are closed; When the low tension switch (43) of multi-joint indoor set was experienced the minimum pressure value, the DC frequency-changeable compressor of multi-joint indoor set (1) was shut down;
Described auxiliary ice making simultaneously and ice-melt refrigeration control method may further comprise the steps:
The deglaciating consumption when needing ice making again, continues to open ice-making process under the prerequisite of operation at ice cold-storage combined air conditioners unit fully in the Ice Storage Tank (30) of ice storage system.
At this moment, the 4th magnetic valve (27) of ice storage system is opened, and the aperture of second electric expansion valve (28) of ice storage system is opened to 120～150 pulses;
The datum target evaporating temperature of setting auxiliary ice maker evaporator coil pipe (34) inner refrigerant of ice storage system is that-15 ℃～-10 ℃, the datum target degree of superheat are 1 ℃～2 ℃;
The accent valve cycle of setting second electric expansion valve (28) of ice storage system is 10～20 seconds;
The aperture of second electric expansion valve (28) of ice storage system=benchmark aperture+degree of superheat is transferred the valve umber of pulse;
The degree of superheat is transferred the valve umber of pulse: the different intervals according to the degree of superheat and degree of superheat variable quantity are selected, and are as shown in the table:
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| CN106369871B (en) * | 2016-10-27 | 2018-09-11 | 中国水产科学研究院渔业机械仪器研究所 | The marine air-conditioning system that tail gas adsorption refrigeration is used in combination with compression refigerating machine group |
| CN107356444B (en) * | 2017-06-14 | 2019-11-05 | 青岛海尔空调器有限总公司 | Test method and test macro for transducer air conditioning |
| CN108775637A (en) * | 2018-07-09 | 2018-11-09 | 珠海格力电器股份有限公司 | Multi-line system and control method |
| CN111397169A (en) * | 2020-03-27 | 2020-07-10 | 广东美的制冷设备有限公司 | Air conditioner frequency limiting method, air conditioner and storage medium |
| US11131491B1 (en) | 2020-08-07 | 2021-09-28 | Emerson Climate Technologies, Inc. | Systems and methods for multi-stage operation of a compressor |
| CN113654224A (en) * | 2021-07-26 | 2021-11-16 | 青岛海尔空调器有限总公司 | Frequency control method and device of air conditioner compressor and air conditioner |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |