CN110779260B - Three-circulation quick-cooling frost-free refrigerator and continuous operation method thereof - Google Patents
Three-circulation quick-cooling frost-free refrigerator and continuous operation method thereof Download PDFInfo
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- CN110779260B CN110779260B CN201911169288.4A CN201911169288A CN110779260B CN 110779260 B CN110779260 B CN 110779260B CN 201911169288 A CN201911169288 A CN 201911169288A CN 110779260 B CN110779260 B CN 110779260B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 238000007710 freezing Methods 0.000 claims abstract description 164
- 230000008014 freezing Effects 0.000 claims abstract description 164
- 238000005057 refrigeration Methods 0.000 claims abstract description 108
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 239000003507 refrigerant Substances 0.000 claims abstract description 39
- 238000001704 evaporation Methods 0.000 claims abstract description 14
- 230000008020 evaporation Effects 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims description 20
- 238000010257 thawing Methods 0.000 claims description 15
- 230000009467 reduction Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 235000013305 food Nutrition 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007605 air drying Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/004—Control mechanisms
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/006—General constructional features for mounting refrigerating machinery components
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Abstract
The invention discloses a three-cycle quick-cooling frostless refrigerator which comprises a refrigerator body and a refrigerating system, wherein an exhaust port of a variable frequency compressor is connected with a first refrigerant pipeline, a compressor room condenser, an anti-dew pipe, a left side condenser and a right side condenser are connected in series on the first refrigerant pipeline along the flow direction of a refrigerant, and the refrigerating system also comprises a one-in three-out electromagnetic valve, a refrigerating and refrigerating mechanism, a variable temperature refrigerating mechanism and a freezing and refrigerating mechanism; the first inlet and the third outlet electromagnetic valves are provided with a sub-control first inlet, a sub-control first outlet and a sub-control third outlet; the inlets of the refrigeration, temperature-changing and freezing capillaries are respectively connected with a first outlet, a second outlet and a third outlet of the sub-control; the outlet of the freezing evaporator is connected with the air suction port of the variable-frequency compressor through a second refrigerant pipeline. The invention also discloses a corresponding continuous operation method. The invention can avoid odor tainting among all the compartments, can independently control the on-off of any compartment of the refrigerator, avoids energy waste, and provides two different evaporation temperatures for each compartment to realize quick cooling.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a frost-free refrigerator and a continuous operation method thereof.
Background
Along with the improvement of living standard of people and the market request, people have higher and higher requirements on the functions and the volumes of refrigerators, so that a plurality of large-volume multi-door multi-temperature-zone air-cooled refrigerators appear in the market. However, the existing air-cooled multi-door refrigerator mainly adopts single evaporator refrigeration, controls the refrigeration of each chamber through an air door switch, and sends cold air to different chambers to achieve the purpose of refrigeration, the air duct structure is complex, and the air is circulated, so that the foods in each chamber such as a refrigerating chamber, a temperature-changing chamber, a freezing chamber and the like are tainted with odor, and the phenomenon of air drying of the foods is also caused; in particular, each time the circulating air passes through one compartment, it may carry the smell of the food in this compartment to the other compartments; when any chamber has a refrigeration requirement, the whole air duct needs to be opened, so that the phenomenon of air drying of food is easily caused.
Because the evaporator of the existing air-cooled refrigerator is in the freezing chamber, the freezing chamber can not be independently closed, and the on-off control of any chamber can not be really realized; this causes the user when not needing the temperature-changing room refrigeration, and the temperature-changing room is still refrigerating, causes unnecessary energy waste.
The untimely frosting of the evaporator can increase the thermal resistance between the evaporator and the air in the freezing chamber and the variable temperature chamber, and obstruct the heat exchange on the surface of the evaporator, thereby influencing the refrigeration effect and increasing the power consumption.
Disclosure of Invention
The invention aims to provide a three-cycle quick-cooling frost-free refrigerator, which solves the problems of odor tainting and energy waste among chambers.
In order to achieve the purpose, the invention adopts the following technical scheme: a three-cycle quick-cooling frostless refrigerator comprises a refrigerator body and a refrigerating system, wherein a refrigerating chamber, a temperature-changing chamber and a freezing chamber are arranged in the refrigerator body, the refrigerating system comprises a variable frequency compressor, an exhaust port of the variable frequency compressor is connected with a first refrigerant pipeline, a compressor chamber condenser, a left side wall condenser and a right side wall condenser are connected in series on the first refrigerant pipeline along the flowing direction of a refrigerant, and the refrigerating system further comprises a one-in three-out electromagnetic valve, a refrigerating and refrigerating mechanism, a temperature-changing refrigerating mechanism and a freezing and refrigerating mechanism;
the first inlet and the third outlet electromagnetic valves are provided with a sub-control first inlet, a sub-control first outlet, a sub-control second outlet and a sub-control third outlet; the refrigerant outlet of the condenser at the right side is connected with a sub-control first inlet of a one-inlet three-outlet electromagnetic valve; the sub-control first inlet of the one-inlet three-outlet electromagnetic valve is selectively communicated with the sub-control first outlet, the sub-control second outlet or the sub-control third outlet;
along the flow direction of the refrigerant, the refrigeration mechanism comprises a refrigeration capillary and a refrigeration evaporator which are connected with each other, the temperature-changing refrigeration mechanism comprises a temperature-changing capillary and a temperature-changing evaporator which are connected with each other, and the freezing refrigeration mechanism comprises a freezing capillary and a freezing evaporator which are connected with each other;
the inlet of the refrigeration capillary is connected with a sub-control first outlet of a one-inlet three-outlet electromagnetic valve;
the inlet of the variable temperature capillary is connected with a sub-control second outlet of the one-inlet three-outlet electromagnetic valve;
the inlet of the freezing capillary is connected with a sub-control third outlet of a one-in three-out electromagnetic valve;
two inlet and outlet three-way valves are arranged among the refrigerating and refrigerating mechanism, the temperature-changing refrigerating mechanism and the freezing and refrigerating mechanism; the two-inlet one-outlet three-way valve is provided with a confluence first inlet, a confluence second inlet and a confluence first outlet;
the outlet of the refrigeration evaporator is connected with the confluence first inlet, and the outlet of the temperature-changing evaporator is connected with the confluence second inlet; the first outlet of the confluence and the outlet of the freezing capillary are both connected with the inlet of the freezing evaporator;
the outlet of the freezing evaporator is connected with the air suction port of the variable-frequency compressor through a second refrigerant pipeline.
The temperature-changing evaporator is provided with a temperature-changing electric heater for defrosting, and the freezing evaporator is provided with a freezing electric heater for defrosting; a defrosting switch is arranged in the refrigerator.
An anti-dew pipe is connected in series on a first refrigerant pipeline between the condenser of the press and the condenser on the left side.
A molecular sieve filter is connected between the outlet of the condenser at the right side and the inlet of the one-inlet three-outlet electromagnetic valve.
The refrigerating evaporator, the variable-temperature evaporator and the freezing evaporator are correspondingly provided with a refrigerating fan for conveying cold energy to the refrigerating chamber, a variable-temperature fan for conveying cold energy to the variable-temperature chamber and a freezing fan for conveying cold energy to the freezing chamber;
a refrigeration short-circuit pipe is connected between the inlet of the refrigeration capillary and the middle part of the refrigeration capillary, and a refrigeration bypass electromagnetic valve is arranged on the refrigeration short-circuit pipe;
a temperature-changing short-circuit pipe is connected between the inlet of the temperature-changing capillary pipe and the middle part of the temperature-changing capillary pipe, and a temperature-changing bypass electromagnetic valve is arranged on the temperature-changing short-circuit pipe;
a freezing short-circuit pipe is connected between the inlet of the freezing capillary and the middle part of the freezing capillary, and a freezing bypass electromagnetic valve is arranged on the freezing short-circuit pipe;
the refrigerator is provided with an electric control device, a refrigerating temperature sensor is arranged in a refrigerating chamber, a variable temperature sensor is arranged in a variable temperature chamber, a freezing temperature sensor is arranged in a freezing chamber, and the refrigerating temperature sensor, the freezing temperature sensor and the variable temperature sensor are all connected with the electric control device; the electric control device is connected with the one-inlet three-outlet electromagnetic valve, the variable-frequency compressor, the refrigeration bypass electromagnetic valve, the variable-temperature bypass electromagnetic valve, the freezing bypass electromagnetic valve, the variable-temperature electric heater, the freezing electric heater, the refrigeration fan, the variable-temperature fan and the freezing fan.
The invention also discloses a continuous operation method of the three-cycle quick-cooling frostless refrigerator, which comprises a normal operation method and a quick-cooling operation method;
the normal operation method comprises the following steps: the user turns on the switch of the refrigerator and sets the target temperature of the refrigerating chamber, the target temperature of the temperature-changing chamber and the target temperature of the freezing chamber through a knob or a control panel of an electric control device;
the electric control device detects temperature values sensed by the refrigerating temperature sensor, the variable temperature sensor and the freezing temperature sensor, and calculates a difference T1 between the actual temperature of the refrigerating chamber and the target temperature of the refrigerating chamber, a difference T2 between the actual temperature of the variable temperature chamber and the target temperature of the variable temperature chamber, and a difference T3 between the actual temperature of the freezing chamber and the target temperature of the freezing chamber; the refrigeration bypass electromagnetic valve, the variable-temperature bypass electromagnetic valve and the freezing bypass electromagnetic valve are all in an opening state, the refrigeration capillary, the variable-temperature capillary and the freezing capillary are all in a partial short circuit state, and the flow resistance of the refrigeration capillary, the variable-temperature capillary and the freezing capillary is a designed normal flow resistance value;
the first step is a judging step: the electric control device firstly judges whether T1 is greater than 1 ℃;
if T1 is greater than 1 deg.C, performing the second step;
if T1 is less than or equal to 1 ℃ and T2 is greater than 1 ℃, performing a third step;
if T1 is less than or equal to 1 ℃, T2 is less than or equal to 1 ℃ and T3 is greater than 1 ℃, performing a fourth step;
if T1 is less than or equal to 1 ℃, T2 is less than or equal to 1 ℃ and T3 is less than or equal to 1 ℃, delaying for 30 seconds and then executing the first step again;
the second step is: the electric control device controls a sub-control first inlet of the one-inlet three-outlet electromagnetic valve to be communicated with a sub-control first outlet, and opens the refrigeration fan and the variable frequency compressor to enable the refrigeration mechanism to work;
under the action of the variable frequency compressor, the refrigerant circularly flows in the directions of the variable frequency compressor, the compressor chamber condenser, the left side wall condenser, the right side wall condenser, the one-in three-out electromagnetic valve, the refrigeration capillary tube, the refrigeration evaporator, the two-in one-out three-way valve, the refrigeration evaporator and the variable frequency compressor, obtains low temperature at the refrigeration evaporator and the refrigeration evaporator, and transmits cold energy to the refrigeration chamber under the action of the refrigeration fan;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T1 is less than-1 ℃; when the temperature T1 is less than minus 1 ℃, the electric control device closes the variable frequency compressor and the refrigeration fan and executes the first step again;
the third step is: the electric control device controls a sub-control first inlet of the one-inlet three-outlet electromagnetic valve to be communicated with a sub-control second outlet, and opens the variable temperature fan and the variable frequency compressor to enable the variable temperature refrigeration mechanism to work;
under the action of the variable frequency compressor, the refrigerant circularly flows in the direction of the variable frequency compressor, the compressor chamber condenser, the left side condenser, the right side condenser, the one-in three-out electromagnetic valve, the variable temperature capillary tube, the variable temperature evaporator, the two-in one-out three-way valve, the freezing evaporator and the variable frequency compressor, obtains low temperature at the variable temperature evaporator and the freezing evaporator, and transmits cold energy to the refrigerating chamber under the action of the variable temperature fan;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T2 is less than-1 ℃; when the temperature T2 is less than minus 1 ℃, the electric control device closes the variable frequency compressor and the variable temperature fan and executes the first step again;
the fourth step is:
the electric control device controls a sub-control first inlet of the one-inlet three-outlet electromagnetic valve to be communicated with a sub-control third outlet, and a freezing fan and the variable frequency compressor are opened to enable the freezing and refrigerating mechanism to work;
under the action of the variable frequency compressor, the refrigerant circularly flows in the directions of the variable frequency compressor, the compressor chamber condenser, the left side wall condenser, the right side wall condenser, the one-inlet three-outlet electromagnetic valve, the freezing capillary tube, the two-inlet one-outlet three-way valve, the freezing evaporator and the variable frequency compressor, obtains low temperature at the freezing evaporator and transmits cold energy to the freezing chamber under the action of the freezing fan;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T3 is less than-1 ℃; and when the T3 is less than-1 ℃, the electric control device closes the variable-frequency compressor and the refrigerating fan and executes the first step again.
i is an integer variable with the value of 1 or 2 or 3; the target temperature of the refrigerating chamber, the target temperature of the temperature-variable chamber and the target temperature of the freezing chamber are collectively called target temperature;
the Ti-corresponding target temperature is called delta Ti;
the operating frequency of the inverter compressor has a highest frequency and a lowest frequency, the difference between the highest frequency and the lowest frequency being Δ P,
a first intermediate frequency and a second intermediate frequency are arranged between the lowest frequency and the highest frequency; a first intermediate frequency of the compressor being the lowest frequency + Δ P × 40%; the second intermediate frequency of the compressor is equal to the lowest frequency + (Δ P × 70%);
in the second step, the third step and the fourth step, when delta Ti is more than 5 ℃, the electric control device of the refrigerator controls the variable frequency compressor to run at the maximum frequency after starting operation; when the temperature is less than 3 ℃ and less than or equal to 5 ℃ than delta Ti, the electric control device of the refrigerator enables the variable frequency compressor to operate at a second intermediate frequency; when the temperature is less than 1 ℃ and less than or equal to 3 ℃ and less than delta Ti, the electric control device of the refrigerator enables the variable frequency compressor to operate at a first intermediate frequency; when the temperature is less than minus 1 ℃ and less than delta Ti and less than or equal to 1 ℃, the electric control device of the refrigerator enables the variable frequency compressor to operate at the lowest frequency;
the starting operation is as follows: when the electric control device opens the variable frequency compressor, the variable frequency compressor is started at the lowest frequency and is kept for 3 seconds, then the variable frequency compressor is operated at the first intermediate frequency and is kept for 3 seconds, then the variable frequency compressor is operated at the second intermediate frequency and is kept for 3 seconds, and finally the variable frequency compressor is continuously operated at the highest frequency.
The refrigeration bypass electromagnetic valve, the variable-temperature bypass electromagnetic valve and the freezing bypass electromagnetic valve are collectively called as bypass electromagnetic valves; the refrigeration capillary, the temperature-changing capillary and the freezing capillary are collectively called as capillaries; the refrigeration evaporator, the temperature-changing evaporator and the freezing evaporator are collectively called as evaporators;
the quick cooling operation method comprises the following steps:
in the second step, the third step and the fourth step, when delta Ti is larger than 10 ℃, after the variable frequency compressor is started, the electric control device keeps the variable frequency compressor to operate at the highest frequency and controls the corresponding bypass electromagnetic valve to be closed; at this time, the flow resistance of the corresponding capillary tube is increased due to the fact that a part of short circuit state is removed, the refrigerant passing through the capillary tube obtains lower evaporation pressure and evaporation temperature compared with the normal flow resistance, and the corresponding evaporator obtains lower temperature due to the fact that the evaporation temperature is reduced, so that the refrigerating speed is improved; along with the reduction of the temperature of the corresponding compartment of the refrigerator, when the delta Ti is less than or equal to 6 ℃, the electric control device opens the corresponding bypass electromagnetic valve to control the operation of the refrigerator by a normal operation method.
After the accumulated running time of the variable-temperature compressor is more than or equal to 40 hours, or after a user manually turns on a defrosting switch, the electric control device turns on the variable-temperature electric heater and the freezing electric heater and keeps the on state for 5 minutes, the variable-temperature evaporator and the freezing evaporator are defrosted, and the running of the variable-temperature compressor is stopped during defrosting.
By adopting the technical scheme of the invention, each chamber is provided with the independent fan and the corresponding evaporator, and circulating air can not pass through the refrigerating chamber, the temperature changing chamber and the freezing chamber any more, so that odor tainting among the chambers can be avoided.
The branch control first inlet of the one-inlet three-outlet electromagnetic valve is selectively communicated with the branch control first outlet, the branch control second outlet or the branch control third outlet, so that one of the refrigerating and refrigerating mechanism, the temperature-changing refrigerating mechanism and the freezing and refrigerating mechanism can be ensured to be in a working state, and the phenomenon that when two or three refrigerating mechanisms work simultaneously, the refrigerating system works abnormally due to overlarge refrigerant flow change (a single evaporator does not have sufficient refrigerant flow) of the refrigerating system is avoided.
Each bypass electromagnetic valve can adjust the flow resistance of the corresponding capillary tube, so that the evaporation pressure and the evaporation temperature of the corresponding evaporator can be adjusted, lower evaporation temperature than normal can be provided when needed, and more rapid refrigeration is realized.
In the execution process of the second step, the third step and the fourth step, the higher the temperature of the corresponding chamber is, the higher the operating frequency of the variable frequency compressor is, so that the temperature of the corresponding chamber can be rapidly reduced; the operation frequency of the frequency conversion compressor is gradually reduced in the process of reducing the temperature of the corresponding compartment, and the frequency conversion compressor is at the lowest frequency when the frequency conversion compressor is turned off at last, so that the cooling speed of the refrigerator is more adaptive to the actual temperature of the refrigerator, the conditions of inaccurate temperature control and energy waste caused by more temperature continuous reduction of the compartment under the action of the corresponding evaporator after the refrigeration of the compartment is stopped are prevented, and the impact on an electric system of the refrigerator is minimum. Similarly, the starting operation enables the starting action of the variable frequency compressor to be softer than before, the impact on the refrigerator electrical system is minimum, and the service life of relevant electrical components is prolonged.
In the invention, in normal operation, the opening value of delta Ti is 1 ℃, and the closing value is-1 ℃, so that a buffer temperature of 2 ℃ is kept between closing and re-opening, thereby avoiding frequent opening of the variable frequency compressor.
In the using process of the refrigerator, the opening frequency of the refrigerating chamber is the most frequent, the opening frequency of the temperature changing chamber is the second time, and the opening frequency of the freezing chamber is the lowest. In the refrigerating process of the refrigerating chamber and the temperature changing chamber, the evaporator of the freezing chamber is always in a low-temperature state (the freezing chamber is in a slow refrigerating state of natural convection refrigeration because a freezing fan is not started), the condition that the refrigerating system works abnormally due to overlarge change of the flow of the refrigerant can be prevented, the freezing chamber is kept in the low-temperature state for a long time, the occurrence frequency of the condition that the actual temperature of the freezing chamber is higher than the set temperature is reduced, and the refrigerating effect of the freezing chamber is more durable and stable.
The quick cooling operation method can further improve the cooling speed of the invention under special conditions (such as just starting the refrigerator).
According to the invention, the press chamber condenser is arranged in the press chamber, the heat dissipation space is increased by utilizing the heat dissipation of the press chamber, and the energy is saved in the practical use of a user.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is an enlarged view at B in FIG. 1;
FIG. 4 is an enlarged view at C of FIG. 1;
FIG. 5 is an enlarged view at D of FIG. 1;
fig. 6 is an enlarged view at E in fig. 1.
Detailed Description
As shown in fig. 1 to 6, the invention provides a three-cycle quick-cooling frostless refrigerator, which comprises a box body and a refrigerating system, wherein a refrigerating chamber, a temperature-changing chamber and a freezing chamber are arranged in the box body, the refrigerating system comprises a variable frequency compressor 1, an exhaust port of the variable frequency compressor 1 is connected with a first refrigerant pipeline 21, a compressor chamber condenser 3, a left side wall condenser 5 and a right side wall condenser 6 are sequentially connected in series on the first refrigerant pipeline 21 along the flow direction of a refrigerant, and the refrigerating system further comprises a one-in three-out electromagnetic valve, a refrigerating mechanism, a temperature-changing refrigerating mechanism and a freezing refrigerating mechanism; the housing is conventional and not shown.
The first inlet and third outlet electromagnetic valve is provided with a sub-control first inlet 81, a sub-control first outlet 82, a sub-control second outlet 83 and a sub-control third outlet 84; the refrigerant outlet of the right upper condenser 6 is connected with a sub-control first inlet 81 of a three-inlet electromagnetic valve; the sub-control first inlet 81 of the one-inlet three-outlet electromagnetic valve is selectively communicated with the sub-control first outlet 82, the sub-control second outlet 83 or the sub-control third outlet 84;
along the flow direction of the refrigerant, the refrigeration mechanism comprises a refrigeration capillary 9 and a refrigeration evaporator 10 which are connected with each other, the temperature-changing refrigeration mechanism comprises a temperature-changing capillary 20 and a temperature-changing evaporator 17 which are connected with each other, and the freezing refrigeration mechanism comprises a freezing capillary 15 and a freezing evaporator 13 which are connected with each other;
the inlet of the refrigeration capillary 9 is connected with a sub-control first outlet 82 of a three-inlet electromagnetic valve;
the inlet of the variable temperature capillary tube 20 is connected with a sub-control second outlet 83 of the one-inlet three-outlet electromagnetic valve;
the inlet of the freezing capillary 15 is connected with a sub-control third outlet 84 of an inlet three-outlet electromagnetic valve;
two inlet and outlet three-way valves are arranged among the refrigerating and refrigerating mechanism, the temperature-changing refrigerating mechanism and the freezing and refrigerating mechanism; the two-in one-out three-way valve is provided with a confluence first inlet 71, a confluence second inlet 72 and a confluence first outlet 73;
the outlet of the refrigeration evaporator 10 is connected with a confluent first inlet 71, and the outlet of the temperature-changing evaporator 17 is connected with a confluent second inlet 72; the confluent first outlet 73 and the outlet of the freezing capillary 15 are both connected with the inlet of the freezing evaporator 13 through a pipeline;
the outlet of the refrigeration evaporator 13 is connected to the suction port of the inverter compressor 1 through a second refrigerant line 19.
A temperature-changing electric heater 18 for defrosting is arranged at the temperature-changing evaporator 17, and a freezing electric heater 14 for defrosting is arranged at the freezing evaporator 13; a defrosting switch is arranged in the refrigerator. The defrost switch may be a physical switch or a virtual switch on the control panel, which is conventional and is not shown.
The first refrigerant pipeline 21 between the condenser of the press and the condenser 5 at the left upper side is connected with an anti-dew pipe 4 in series. The dew-proof pipe 4 is used for preventing the edge of the refrigerator door body from corroding the door frame due to dew condensation through higher temperature.
A molecular sieve filter 7 is connected between the outlet of the condenser 6 at the right side and the inlet of the one-inlet three-outlet electromagnetic valve. The refrigerating evaporator 10, the variable temperature evaporator 17 and the freezing evaporator 13 are correspondingly provided with a refrigerating fan 11 for conveying cold energy to a refrigerating chamber, a variable temperature fan 16 for conveying cold energy to a variable temperature chamber and a freezing fan 12 for conveying cold energy to a freezing chamber;
a refrigeration short-circuit pipe 31 is connected between the inlet of the refrigeration capillary 9 and the middle part of the refrigeration capillary 9, and a refrigeration bypass electromagnetic valve 32 is arranged on the refrigeration short-circuit pipe 31;
a temperature-changing short-circuit pipe 33 is connected between the inlet of the temperature-changing capillary tube 20 and the middle part of the temperature-changing capillary tube 20, and a temperature-changing bypass electromagnetic valve 34 is arranged on the temperature-changing short-circuit pipe 33;
a freezing short-circuit pipe 35 is connected between the inlet of the freezing capillary 15 and the middle part of the freezing capillary 15, and a freezing bypass electromagnetic valve 36 is arranged on the freezing short-circuit pipe 35;
the refrigerator is provided with an electric control device, a refrigerating temperature sensor is arranged in a refrigerating chamber, a variable temperature sensor is arranged in a variable temperature chamber, a freezing temperature sensor is arranged in a freezing chamber, and the refrigerating temperature sensor, the freezing temperature sensor and the variable temperature sensor are all connected with the electric control device; the electric control device is connected with the one-inlet three-outlet electromagnetic valve, the variable-frequency compressor 1, the refrigeration bypass electromagnetic valve 32, the variable-temperature bypass electromagnetic valve 34, the freezing bypass electromagnetic valve 36, the variable-temperature electric heater 18, the freezing electric heater 14, the refrigeration fan 11, the variable-temperature fan 16 and the freezing fan 12. The electric control device usually adopts a single chip with a display screen or an integrated circuit board with a display screen. The electronic control device and the temperature sensors are conventional components, not shown.
The invention also discloses a continuous operation method of the three-cycle quick-cooling frostless refrigerator, which comprises a normal operation method and a quick-cooling operation method;
the normal operation method comprises the following steps: the user turns on the switch of the refrigerator and sets the target temperature of the refrigerating chamber, the target temperature of the temperature-changing chamber and the target temperature of the freezing chamber through a knob or a control panel of an electric control device;
the electric control device detects temperature values sensed by the refrigerating temperature sensor, the variable temperature sensor and the freezing temperature sensor, and calculates a difference value T1 between the actual temperature of the refrigerating chamber and the target temperature of the refrigerating chamber (T1 is the actual temperature of the refrigerating chamber-the target temperature of the refrigerating chamber), a difference value T2 between the actual temperature of the variable temperature chamber and the target temperature of the variable temperature chamber (T2 is the actual temperature of the variable temperature chamber-the target temperature of the variable temperature chamber), and a difference value T3 between the actual temperature of the freezing chamber and the target temperature of the freezing chamber (T3 is the actual temperature of the freezing chamber-the target temperature of the freezing; the refrigeration bypass electromagnetic valve 32, the variable-temperature bypass electromagnetic valve 34 and the freezing bypass electromagnetic valve 36 are all in an open state, at the moment, the refrigeration capillary 9, the variable-temperature capillary 20 and the freezing capillary 15 are all in a state of partial short circuit, and at the moment, the flow resistances of the refrigeration capillary 9, the variable-temperature capillary 20 and the freezing capillary 15 are all designed normal flow resistance values;
the first step is a judging step: the electric control device firstly judges whether T1 is greater than 1 ℃;
if T1 is greater than 1 deg.C, performing the second step;
if T1 is less than or equal to 1 ℃ and T2 is greater than 1 ℃, performing a third step;
if T1 is less than or equal to 1 ℃, T2 is less than or equal to 1 ℃ and T3 is greater than 1 ℃, performing a fourth step;
if T1 is less than or equal to 1 ℃, T2 is less than or equal to 1 ℃ and T3 is less than or equal to 1 ℃, delaying for 30 seconds and then executing the first step again;
the second step is: the electric control device controls a sub-control first inlet 81 of the one-inlet three-outlet electromagnetic valve to be communicated with a sub-control first outlet 82, and opens the refrigeration fan 11 and the variable frequency compressor 1 to enable the refrigeration mechanism to work;
under the action of the variable frequency compressor 1, a refrigerant circularly flows along the directions of the variable frequency compressor 1, a compressor chamber condenser 3, an anti-dew pipe, a left side wall condenser 5, a right side wall condenser 6, an one-in three-out electromagnetic valve, a refrigeration capillary 9, a refrigeration evaporator 10, a two-in one-out three-way valve, a refrigeration evaporator 13 and the variable frequency compressor 1, obtains low temperature at the refrigeration evaporator 10 and the refrigeration evaporator 13, and conveys cold energy to a refrigeration chamber under the action of a refrigeration fan 11;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T1 is less than-1 ℃; when the temperature T1 is less than minus 1 ℃, the electric control device closes the variable-frequency compressor 1 and the refrigeration fan 11 and executes the first step again;
the third step is: the electric control device controls the sub-control first inlet 81 of the one-inlet three-outlet electromagnetic valve to be communicated with the sub-control second outlet 83, and opens the variable temperature fan 16 and the variable frequency compressor 1 to enable the variable temperature refrigeration mechanism to work;
under the action of the variable frequency compressor 1, a refrigerant circularly flows along the directions of the variable frequency compressor 1, a compressor chamber condenser 3, an anti-dew pipe, a left side wall condenser 5, a right side wall condenser 6, a one-inlet three-outlet electromagnetic valve, a variable temperature capillary tube 20, a variable temperature evaporator 17, a two-inlet one-outlet three-way valve, a freezing evaporator 13 and the variable frequency compressor 1, obtains low temperature at the variable temperature evaporator 17 and the freezing evaporator 13, and transmits cold energy to a refrigerating chamber under the action of a variable temperature fan 16;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T2 is less than-1 ℃; when the temperature T2 is less than minus 1 ℃, the electric control device closes the variable frequency compressor 1 and the variable temperature fan 16, and the first step is executed again;
the fourth step is:
the electric control device controls the sub-control first inlet 81 of the one-inlet three-outlet electromagnetic valve to be communicated with the sub-control third outlet 84, and opens the freezing fan 12 and the variable frequency compressor 1 to enable the freezing and refrigerating mechanism to work;
under the action of the variable frequency compressor 1, a refrigerant circularly flows along the directions of the variable frequency compressor 1, a compressor chamber condenser 3, an anti-dew pipe, a left side wall condenser 5, a right side wall condenser 6, a one-inlet three-outlet electromagnetic valve, a freezing capillary tube 15, a two-inlet one-outlet three-way valve, a freezing evaporator 13 and the variable frequency compressor 1, obtains low temperature at the freezing evaporator 13 and conveys cold energy to a freezing chamber under the action of a freezing fan 12;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T3 is less than-1 ℃; when T3 is less than-1 deg.C, the electric control device turns off the inverter compressor 1 and the freezing fan 12, and the first step is executed again.
i is an integer variable with the value of 1 or 2 or 3; the target temperature of the refrigerating chamber, the target temperature of the temperature-variable chamber and the target temperature of the freezing chamber are collectively called target temperature;
referring to Ti-corresponding target temperature (i =1, the corresponding target temperature is the target temperature of the refrigerating chamber; i =2, the corresponding target temperature is the target temperature of the temperature-changing chamber; i =3, the corresponding target temperature is the target temperature of the freezing chamber) as delta Ti;
the operating frequency of the inverter compressor 1 has a highest frequency and a lowest frequency, the difference between the highest frequency and the lowest frequency being Δ P,
a first intermediate frequency and a second intermediate frequency are arranged between the lowest frequency and the highest frequency; a first intermediate frequency of the compressor being the lowest frequency + Δ P × 40%; the second intermediate frequency of the compressor is the lowest frequency +. delta P × 70%.
In the second step, the third step and the fourth step, when delta Ti is more than 5 ℃, the electric control device of the refrigerator controls the variable frequency compressor 1 to operate at the maximum frequency after starting operation; when the temperature is less than 3 ℃ and less than or equal to 5 ℃ than delta Ti, the electric control device of the refrigerator enables the variable frequency compressor 1 to operate at a second intermediate frequency; when the temperature is less than 1 ℃ and less than or equal to 3 ℃ and less than or equal to delta Ti, the electric control device of the refrigerator enables the variable frequency compressor 1 to operate at a first intermediate frequency; when the temperature is less than minus 1 ℃ and less than delta Ti and less than or equal to 1 ℃, the electric control device of the refrigerator enables the variable frequency compressor 1 to operate at the lowest frequency;
the starting operation is as follows: when the electric control device opens the variable frequency compressor 1, the variable frequency compressor 1 is started at the lowest frequency and is kept for 3 seconds, then the variable frequency compressor 1 is operated at the first intermediate frequency and is kept for 3 seconds, then the variable frequency compressor 1 is operated at the second intermediate frequency and is kept for 3 seconds, and finally the variable frequency compressor 1 is continuously operated at the highest frequency.
The refrigeration bypass solenoid valve 32, the variable temperature bypass solenoid valve 34 and the freezing bypass solenoid valve 36 are collectively referred to as bypass solenoid valves; the refrigeration capillary 9, the temperature-changing capillary 20 and the freezing capillary 15 are collectively called capillaries; the refrigeration evaporator 10, the temperature-changing evaporator 17 and the freezing evaporator 13 are collectively referred to as evaporators;
the quick cooling operation method comprises the following steps:
when delta Ti > 10 ℃ in the second, third and fourth steps, the electronic control device keeps the inverter compressor 1 running at the highest frequency after the inverter compressor 1 is turned on (and after the start-up operation is performed), and controls the corresponding bypass solenoid valve to be closed (the refrigeration bypass solenoid valve 32 is opened in the second step, the variable temperature bypass solenoid valve 34 is opened in the third step, and the refrigeration bypass solenoid valve 36 is opened in the fourth step); at this time, the flow resistance of the corresponding capillary tube is increased due to the fact that a part of short circuit state is removed, the refrigerant passing through the capillary tube obtains lower evaporation pressure and evaporation temperature compared with the normal flow resistance, and the corresponding evaporator obtains lower temperature due to the fact that the evaporation temperature is reduced, so that the refrigerating speed is improved; along with the temperature reduction of the corresponding chambers of the refrigerator (the refrigerating chamber in the second step, the temperature changing chamber in the third step and the freezing chamber in the fourth step), when delta Ti is less than or equal to 6 ℃, the electric control device opens the corresponding bypass electromagnetic valves to control the operation of the refrigerator by a normal operation method.
After the accumulated running time of the variable-frequency compressor 1 is more than or equal to 40 hours, or after a user manually turns on a defrosting switch, the electric control device turns on the variable-temperature electric heater 18 and the freezing electric heater 14 and keeps the on state for 5 minutes, defrosts the variable-temperature evaporator 17 and the freezing evaporator 13, and stops the running of the variable-frequency compressor 1 during defrosting.
Since the freezing evaporator 13 is usually designed to have a high evaporation temperature, it is not necessary to provide an electric heater to the refrigerating evaporator 10. In an extreme case, the refrigerating evaporator 10 may be defrosted by opening a door of the refrigerating chamber.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (4)
1. The continuous operation method of the three-cycle quick-cooling frost-free refrigerator comprises a box body and a refrigerating system, wherein a refrigerating chamber, a temperature-changing chamber and a freezing chamber are arranged in the box body, the refrigerating system comprises a variable frequency compressor, an exhaust port of the variable frequency compressor is connected with a first refrigerant pipeline, and a compressor chamber condenser, a left side wall condenser and a right side wall condenser are connected in series along the flowing direction of a refrigerant on the first refrigerant pipeline, and the three-cycle quick-cooling frost-free refrigerator is characterized in that: the refrigerating system also comprises a one-inlet three-outlet electromagnetic valve, a refrigerating and refrigerating mechanism, a variable-temperature refrigerating mechanism and a freezing and refrigerating mechanism;
the first inlet and the third outlet electromagnetic valves are provided with a sub-control first inlet, a sub-control first outlet, a sub-control second outlet and a sub-control third outlet; the refrigerant outlet of the condenser at the right side is connected with a sub-control first inlet of a one-inlet three-outlet electromagnetic valve; the sub-control first inlet of the one-inlet three-outlet electromagnetic valve is selectively communicated with the sub-control first outlet, the sub-control second outlet or the sub-control third outlet;
along the flow direction of the refrigerant, the refrigeration mechanism comprises a refrigeration capillary and a refrigeration evaporator which are connected with each other, the temperature-changing refrigeration mechanism comprises a temperature-changing capillary and a temperature-changing evaporator which are connected with each other, and the freezing refrigeration mechanism comprises a freezing capillary and a freezing evaporator which are connected with each other;
the inlet of the refrigeration capillary is connected with a sub-control first outlet of a one-inlet three-outlet electromagnetic valve;
the inlet of the variable temperature capillary is connected with a sub-control second outlet of the one-inlet three-outlet electromagnetic valve;
the inlet of the freezing capillary is connected with a sub-control third outlet of a one-in three-out electromagnetic valve;
two inlet and outlet three-way valves are arranged among the refrigerating and refrigerating mechanism, the temperature-changing refrigerating mechanism and the freezing and refrigerating mechanism; the two-inlet one-outlet three-way valve is provided with a confluence first inlet, a confluence second inlet and a confluence first outlet;
the outlet of the refrigeration evaporator is connected with the confluence first inlet, and the outlet of the temperature-changing evaporator is connected with the confluence second inlet; the first outlet of the confluence and the outlet of the freezing capillary are both connected with the inlet of the freezing evaporator;
the outlet of the refrigeration evaporator is connected with the air suction port of the variable frequency compressor through a second refrigerant pipeline;
the temperature-changing evaporator is provided with a temperature-changing electric heater for defrosting, and the freezing evaporator is provided with a freezing electric heater for defrosting; a defrosting switch is arranged in the refrigerator;
the refrigerating evaporator, the variable-temperature evaporator and the freezing evaporator are correspondingly provided with a refrigerating fan for conveying cold energy to the refrigerating chamber, a variable-temperature fan for conveying cold energy to the variable-temperature chamber and a freezing fan for conveying cold energy to the freezing chamber;
a refrigeration short-circuit pipe is connected between the inlet of the refrigeration capillary and the middle part of the refrigeration capillary, and a refrigeration bypass electromagnetic valve is arranged on the refrigeration short-circuit pipe;
a temperature-changing short-circuit pipe is connected between the inlet of the temperature-changing capillary pipe and the middle part of the temperature-changing capillary pipe, and a temperature-changing bypass electromagnetic valve is arranged on the temperature-changing short-circuit pipe;
a freezing short-circuit pipe is connected between the inlet of the freezing capillary and the middle part of the freezing capillary, and a freezing bypass electromagnetic valve is arranged on the freezing short-circuit pipe;
the refrigerator is provided with an electric control device, a refrigerating temperature sensor is arranged in a refrigerating chamber, a variable temperature sensor is arranged in a variable temperature chamber, a freezing temperature sensor is arranged in a freezing chamber, and the refrigerating temperature sensor, the freezing temperature sensor and the variable temperature sensor are all connected with the electric control device; the electric control device is connected with the one-inlet three-outlet electromagnetic valve, the variable-frequency compressor, the refrigeration bypass electromagnetic valve, the variable-temperature bypass electromagnetic valve, the freezing bypass electromagnetic valve, the variable-temperature electric heater, the freezing electric heater, the refrigeration fan, the variable-temperature fan and the freezing fan;
the method is characterized in that: the method comprises a normal operation method and a quick cooling operation method;
the normal operation method comprises the following steps: the user turns on the switch of the refrigerator and sets the target temperature of the refrigerating chamber, the target temperature of the temperature-changing chamber and the target temperature of the freezing chamber through a knob or a control panel of an electric control device;
the electric control device detects temperature values sensed by the refrigerating temperature sensor, the variable temperature sensor and the freezing temperature sensor, and calculates a difference T1 between the actual temperature of the refrigerating chamber and the target temperature of the refrigerating chamber, a difference T2 between the actual temperature of the variable temperature chamber and the target temperature of the variable temperature chamber, and a difference T3 between the actual temperature of the freezing chamber and the target temperature of the freezing chamber; the refrigeration bypass electromagnetic valve, the variable-temperature bypass electromagnetic valve and the freezing bypass electromagnetic valve are all in an opening state, the refrigeration capillary, the variable-temperature capillary and the freezing capillary are all in a partial short circuit state, and the flow resistance of the refrigeration capillary, the variable-temperature capillary and the freezing capillary is a designed normal flow resistance value;
the first step is a judging step: the electric control device firstly judges whether T1 is greater than 1 ℃;
if T1 is greater than 1 deg.C, performing the second step;
if T1 is less than or equal to 1 ℃ and T2 is greater than 1 ℃, performing a third step;
if T1 is less than or equal to 1 ℃, T2 is less than or equal to 1 ℃ and T3 is greater than 1 ℃, performing a fourth step;
if T1 is less than or equal to 1 ℃, T2 is less than or equal to 1 ℃ and T3 is less than or equal to 1 ℃, delaying for 30 seconds and then executing the first step again;
the second step is: the electric control device controls a sub-control first inlet of the one-inlet three-outlet electromagnetic valve to be communicated with a sub-control first outlet, and opens the refrigeration fan and the variable frequency compressor to enable the refrigeration mechanism to work;
under the action of the variable frequency compressor, the refrigerant circularly flows in the directions of the variable frequency compressor, the compressor chamber condenser, the left side wall condenser, the right side wall condenser, the one-in three-out electromagnetic valve, the refrigeration capillary tube, the refrigeration evaporator, the two-in one-out three-way valve, the refrigeration evaporator and the variable frequency compressor, obtains low temperature at the refrigeration evaporator and the refrigeration evaporator, and transmits cold energy to the refrigeration chamber under the action of the refrigeration fan;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T1 is less than-1 ℃; when the temperature T1 is less than minus 1 ℃, the electric control device closes the variable frequency compressor and the refrigeration fan and executes the first step again;
the third step is: the electric control device controls a sub-control first inlet of the one-inlet three-outlet electromagnetic valve to be communicated with a sub-control second outlet, and opens the variable temperature fan and the variable frequency compressor to enable the variable temperature refrigeration mechanism to work;
under the action of the variable frequency compressor, the refrigerant circularly flows in the direction of the variable frequency compressor, the compressor chamber condenser, the left side condenser, the right side condenser, the one-in three-out electromagnetic valve, the variable temperature capillary tube, the variable temperature evaporator, the two-in one-out three-way valve, the freezing evaporator and the variable frequency compressor, obtains low temperature at the variable temperature evaporator and the freezing evaporator, and transmits cold energy to the refrigerating chamber under the action of the variable temperature fan;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T2 is less than-1 ℃; when the temperature T2 is less than minus 1 ℃, the electric control device closes the variable frequency compressor and the variable temperature fan and executes the first step again;
the fourth step is:
the electric control device controls a sub-control first inlet of the one-inlet three-outlet electromagnetic valve to be communicated with a sub-control third outlet, and a freezing fan and the variable frequency compressor are opened to enable the freezing and refrigerating mechanism to work;
under the action of the variable frequency compressor, the refrigerant circularly flows in the directions of the variable frequency compressor, the compressor chamber condenser, the left side wall condenser, the right side wall condenser, the one-inlet three-outlet electromagnetic valve, the freezing capillary tube, the two-inlet one-outlet three-way valve, the freezing evaporator and the variable frequency compressor, obtains low temperature at the freezing evaporator and transmits cold energy to the freezing chamber under the action of the freezing fan;
the electric control device continuously keeps the refrigerating state of the refrigerating chamber and simultaneously continuously judges whether T3 is less than-1 ℃; and when the T3 is less than-1 ℃, the electric control device closes the variable-frequency compressor and the refrigerating fan and executes the first step again.
2. The continuous operation method according to claim 1, characterized in that: i is an integer variable with the value of 1 or 2 or 3; the target temperature of the refrigerating chamber, the target temperature of the temperature-variable chamber and the target temperature of the freezing chamber are collectively called target temperature;
the Ti-corresponding target temperature is called delta Ti;
the operating frequency of the inverter compressor has a highest frequency and a lowest frequency, the difference between the highest frequency and the lowest frequency being Δ P,
a first intermediate frequency and a second intermediate frequency are arranged between the lowest frequency and the highest frequency; a first intermediate frequency of the compressor being the lowest frequency + Δ P × 40%; the second intermediate frequency of the compressor is equal to the lowest frequency + (Δ P × 70%);
in the second step, the third step and the fourth step, when delta Ti is more than 5 ℃, the electric control device of the refrigerator controls the variable frequency compressor to run at the maximum frequency after starting operation; when the temperature is less than 3 ℃ and less than or equal to 5 ℃ than delta Ti, the electric control device of the refrigerator enables the variable frequency compressor to operate at a second intermediate frequency; when the temperature is less than 1 ℃ and less than or equal to 3 ℃ and less than delta Ti, the electric control device of the refrigerator enables the variable frequency compressor to operate at a first intermediate frequency; when the temperature is less than minus 1 ℃ and less than delta Ti and less than or equal to 1 ℃, the electric control device of the refrigerator enables the variable frequency compressor to operate at the lowest frequency;
the starting operation is as follows: when the electric control device opens the variable frequency compressor, the variable frequency compressor is started at the lowest frequency and is kept for 3 seconds, then the variable frequency compressor is operated at the first intermediate frequency and is kept for 3 seconds, then the variable frequency compressor is operated at the second intermediate frequency and is kept for 3 seconds, and finally the variable frequency compressor is continuously operated at the highest frequency.
3. The continuous operation method according to claim 1, characterized in that: the refrigeration bypass electromagnetic valve, the variable-temperature bypass electromagnetic valve and the freezing bypass electromagnetic valve are collectively called as bypass electromagnetic valves; the refrigeration capillary, the temperature-changing capillary and the freezing capillary are collectively called as capillaries; the refrigeration evaporator, the temperature-changing evaporator and the freezing evaporator are collectively called as evaporators;
the quick cooling operation method comprises the following steps:
in the second step, the third step and the fourth step, when delta Ti is larger than 10 ℃, after the variable frequency compressor is started, the electric control device keeps the variable frequency compressor to operate at the highest frequency and controls the corresponding bypass electromagnetic valve to be closed; at this time, the flow resistance of the corresponding capillary tube is increased due to the fact that a part of short circuit state is removed, the refrigerant passing through the capillary tube obtains lower evaporation pressure and evaporation temperature compared with the normal flow resistance, and the corresponding evaporator obtains lower temperature due to the fact that the evaporation temperature is reduced, so that the refrigerating speed is improved; along with the reduction of the temperature of the corresponding compartment of the refrigerator, when the delta Ti is less than or equal to 6 ℃, the electric control device opens the corresponding bypass electromagnetic valve to control the operation of the refrigerator by a normal operation method.
4. The continuous operation method according to claim 1, characterized in that: after the accumulated running time of the variable-temperature compressor is more than or equal to 40 hours, or after a user manually turns on a defrosting switch, the electric control device turns on the variable-temperature electric heater and the freezing electric heater and keeps the on state for 5 minutes, the variable-temperature evaporator and the freezing evaporator are defrosted, and the running of the variable-temperature compressor is stopped during defrosting.
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| CN113701374B (en) * | 2020-05-21 | 2022-11-18 | 合肥华凌股份有限公司 | Refrigeration equipment, refrigeration system and control method thereof |
| CN113970227A (en) * | 2020-07-22 | 2022-01-25 | 海信（山东）冰箱有限公司 | Three-system refrigerator and control method |
| CN112640693A (en) * | 2020-09-09 | 2021-04-13 | 江苏振宁半导体研究院有限公司 | Greenhouse temperature control system and detection method |
| CN114608257A (en) * | 2022-03-11 | 2022-06-10 | 长虹美菱股份有限公司 | Refrigerating system of three-system refrigerator and control method |
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