CN112964003B - Control method of refrigerator using micro moving-magnet type series two-stage linear compressor - Google Patents
Control method of refrigerator using micro moving-magnet type series two-stage linear compressor Download PDFInfo
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- CN112964003B CN112964003B CN202110091861.5A CN202110091861A CN112964003B CN 112964003 B CN112964003 B CN 112964003B CN 202110091861 A CN202110091861 A CN 202110091861A CN 112964003 B CN112964003 B CN 112964003B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007710 freezing Methods 0.000 claims abstract description 103
- 230000008014 freezing Effects 0.000 claims abstract description 98
- 238000005057 refrigeration Methods 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000003507 refrigerant Substances 0.000 claims description 51
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 235000013305 food Nutrition 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 235000013372 meat Nutrition 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 235000014102 seafood Nutrition 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The control method of the refrigerator using the micro moving-magnetic type series two-stage linear compressor comprises a refrigerator system and a control system; the refrigerator system comprises a refrigeration system and a freezing refrigeration system, wherein the refrigeration system shares the same linear compressor, the condenser and the drying filter; the refrigerating refrigeration system also comprises a refrigerating chamber capillary tube, a refrigerating chamber evaporator and a liquid storage device 1; the refrigeration system also includes a freezer capillary tube, a freezer evaporator, and a reservoir 2. The control system comprises a control panel, an electromagnetic valve 1, an electromagnetic valve 2, a linear compressor, a refrigerating chamber temperature sensor and a freezing chamber temperature sensor. The operation modes of the refrigerator system, including single refrigeration operation, single freezing operation and simultaneous operation modes of refrigeration and freezing, are adjusted by controlling the opening of the electromagnetic valve 1 and the electromagnetic valve 2 and the operation of the high-pressure stage compressor and the low-pressure stage compressor by the control panel. The refrigerator control method can obtain lower temperature and reduce power consumption.
Description
Technical Field
The invention relates to the field of refrigeration, in particular to a control method of a refrigerator using a micro moving-magnetic type series two-stage linear compressor.
Background
With the improvement of living standard of people, the freezing function of a common refrigerator (the temperature is higher than minus 18 ℃) can not meet the freezing requirement of people on some foods gradually, and for example, some seafood needs to be better preserved at the temperature of minus 40 ℃. Taking meat as an example, when the meat is stored in a common refrigerator, the refrigerating time at 7 ℃ can not exceed 2 days, and the refrigerating time at 0 ℃ can not exceed 5 days, and when the meat is frozen at-18 ℃, the time can not exceed 1 month. For food which needs to be preserved for a long time, the lower the freezing temperature is, the more the growth and the propagation of microorganisms and the activity of enzymes can be inhibited, the less the nutrition loss is, and the better the preservation freshness is.
The single-stage compression steam refrigeration cycle is widely adopted in common refrigerators and freezing and refrigerating systems, the pressure ratio generally does not exceed 8-10, the compressor adopts a traditional reciprocating piston type compressor, and under the common environmental conditions, the common intermediate-temperature refrigerant can only obtain the low temperature of-20 to-40 ℃ when the maximum value of the pressure ratio range is allowed.
Compared with the traditional reciprocating piston compressor, the linear compressor has the characteristics of compact structure, small volume, high efficiency and the like, and is gradually applied to civil refrigeration equipment such as refrigerator systems, air conditioners and the like from the military fields such as aerospace and the like. The moving magnet linear compressor is mainly a reciprocating piston compressor driven by a moving magnet linear oscillating motor. The stator of the oscillating motor is composed of an inner yoke and an outer yoke, and the end of the excitation coil forms a magnetic pole. The rotor is composed of a permanent magnet and is connected with the piston and the spring through a supporting piece. The work magnetic field of the oscillating motor consists of two parts, wherein one part is an alternating magnetic field generated by an excitation coil, the other part is a constant magnetic field generated by a permanent magnet, and under the interaction of the two magnetic fields, an axial electromagnetic driving force is generated to further push a piston in a cylinder to do reciprocating linear motion.
Disclosure of Invention
In order to solve the problems that the refrigerator system using the single-stage compression refrigeration cycle cannot provide lower temperature and the traditional reciprocating piston type compressor has low efficiency, the invention provides a control method of a refrigerator using a micro moving-magnetic type series two-stage linear compressor. The compressor used by the refrigerator system is a micro moving magnetic type series two-stage linear compressor, and is provided with a high-pressure stage compressor and a low-pressure stage compressor, wherein the high-pressure stage compressor and the low-pressure stage compressor both adopt moving magnetic type linear motors, and the refrigerator system has the advantages of compact structure, small volume, oil-free lubrication and high efficiency. The high-pressure stage compressor and the low-pressure stage compressor are symmetrically arranged and fixed through the middle sleeve, and vibration is greatly reduced. The working process of the miniature moving-magnetic type series two-stage linear compressor comprises the following steps: the refrigerant from the freezing chamber evaporator enters a suction cavity of the low-pressure stage compressor through a gas inlet on a shell of the low-pressure stage compressor, enters a compression cavity of the low-pressure stage compressor through a suction channel and a suction valve plate on a piston, the piston oscillates in a reciprocating manner to compress refrigerant gas, the refrigerant gas is discharged by a discharge valve, the refrigerant gas is mixed with the refrigerant from the refrigerating chamber evaporator in an intermediate kit, and meanwhile, the refrigerant gas exchanges heat with the environment through the intermediate kit, so that the suction temperature of the high-pressure stage compressor is reduced.
The invention provides a control method of a refrigerator using a micro moving-magnet type series two-stage linear compressor, which is characterized by comprising a refrigerator system and a control system; the refrigerator system comprises a refrigeration and refrigeration system and a freezing and refrigeration system, wherein the refrigeration and freezing and refrigeration systems share the same compressor, condenser and drying filter.
The moving-magnetic type series two-stage linear compressor comprises a low-pressure stage compressor, an intermediate external member and a high-pressure stage compressor; the low-pressure compressor comprises a shell, an integral frame, a rotor part and a linear motor, wherein an air suction port and a power supply interface are arranged on the low-pressure compressor shell, the integral frame of the low-pressure compressor is made of aluminum, and the low-pressure compressor shell, the integral frame and a middle sleeve are fixedly sealed through screws. The linear motor part of the low-pressure stage compressor comprises outer yoke iron, inner yoke iron, a coil and a coil framework, wherein the inner yoke iron and the outer yoke iron are made of electrician pure iron, the inner yoke iron is fixed on the whole rack through gluing, the coil framework is sleeved on the outer side of the coil, and the outer yoke iron is embedded on the coil framework. The rotor part of the low-pressure stage compressor comprises a plate spring, a piston, a connecting piece, a permanent magnet and a permanent magnet support, wherein the piston and the permanent magnet support are fixed through the connecting piece and keep coaxiality, the permanent magnet is adhered to the permanent magnet support, a plate spring assembly is fixed on the integral rack through a screw, and the connecting piece and the plate spring assembly are fixed through a nut. Because of the radial rigidity of the plate spring, the piston and the piston wall keep coaxial, the friction is reduced, an air suction channel is arranged between the piston and the connecting piece, and an air suction valve plate is arranged at the top end of the piston. The middle sleeve is made of aluminum, an exhaust port and an air inlet port are arranged on the middle sleeve, the exhaust port is connected with an exhaust pipeline and used for exhausting refrigerant gas compressed by the high-pressure stage compressor, and refrigerant coming out of the refrigerating chamber evaporator enters the cavity of the middle sleeve through the air inlet port on the middle sleeve and is mixed with refrigerant compressed by the low-pressure stage. The high-pressure stage compressor linear motor and the rotor part have the same structure as the low-pressure stage compressor linear motor and the rotor part, and the difference lies in that an air suction port is not required to be arranged on a shell of the high-pressure stage compressor, only a power supply interface is required to be arranged, a sealing gasket and an end cover are required to be added on an air outlet of the integral frame of the high-pressure stage compressor, the sealing gasket and the end cover are fixed on the integral frame of the high-pressure stage compressor by screws, the end cover is connected with an air exhaust pipe, a circular air suction port is arranged on the integral frame of the high-pressure stage compressor, and the number of the circular air suction ports is 4-6.
The refrigerating and refrigerating system comprises a compressor, a condenser, a dry filter, a refrigerating chamber capillary tube, a refrigerating chamber evaporator and a liquid storage device 1; the freezing and refrigerating system comprises a compressor, a condenser, a dry filter, a freezing chamber capillary tube, a freezing chamber evaporator and a liquid storage device 2.
The control system comprises a control panel, an electromagnetic valve 1, an electromagnetic valve 2, a refrigerating chamber temperature sensor and a freezing chamber temperature sensor.
The invention provides a control method of a refrigerator using a micro moving-magnet type series two-stage linear compressor, which controls three operation modes of a refrigerator system through a control board: single refrigeration operation, single freezing operation and simultaneous operation of refrigeration and freezing.
When the refrigerator is in the single refrigeration running mode, the control panel of the refrigerator enables the electromagnetic valve 1 to be in an electrified positive pulse state, the electromagnetic valve 2 is not electrified and is in a closed state, meanwhile, the control panel enables the high-pressure-stage compressor to be electrified, the low-pressure-stage compressor is not electrified and is in a closed state, a refrigerant enters the cavity of the middle sleeve from the air inlet on the middle sleeve, is compressed and discharged through the high-pressure-stage compressor, enters the condenser, then enters the refrigerating chamber evaporator through the drying filter, the electromagnetic valve 1 and the refrigerating chamber capillary tube, evaporates and absorbs heat, and then a refrigeration cycle is completed. The refrigerating chamber temperature sensor detects the temperature of the refrigerating chamber, the circulation loop operates until the temperature of the refrigerating chamber reaches the lower limit of the temperature set value of the refrigerating chamber, the control panel cuts off the power supply of the high-pressure stage compressor, and the temperature rises after the machine is stopped. If the temperature sensor of the refrigerating chamber detects that the temperature of the refrigerating chamber reaches the upper limit of the temperature set value of the refrigerating chamber, the control panel controls the high-pressure stage compressor to be electrified, and the circulation loop continues to operate.
During the single freezing operation mode, the control panel control solenoid valve 2 of refrigerator is in the positive pulse state that gets electric, and solenoid valve 1 is not circular telegram, is in the closed condition, and control panel control high-pressure stage compressor and low-pressure stage compressor let in the power with same frequency, with voltage together simultaneously, and high-pressure stage compressor and low-pressure stage compressor operate simultaneously, and high-pressure stage compressor and low-pressure stage compressor piston motion are the same, have greatly offset the vibration, have increased the reliability. The refrigerant from the freezing chamber evaporator enters the compressor through an air inlet on the shell of the low-pressure stage compressor, is discharged through two-stage compression of the high-pressure stage compressor and the low-pressure stage compressor, enters the condenser, then enters the freezing chamber evaporator through the drying filter, the electromagnetic valve 2 and the freezing chamber capillary tube, evaporates and absorbs heat, and then completes a refrigeration cycle. The freezing chamber temperature sensor detects the temperature of the freezing chamber, the circulation loop operates until the temperature of the freezing chamber reaches the lower limit of the set value of the temperature of the freezing chamber, the control panel disconnects the power supply of the high-pressure stage compressor and the low-pressure stage compressor, and the temperature rises after the machine is stopped. And if the freezing chamber temperature sensor detects that the temperature of the freezing chamber reaches the upper limit of the set value of the freezing chamber temperature, the control panel controls the high-pressure stage compressor and the low-pressure stage compressor to be electrified, and the circulation loop is continued.
When in a cold storage and freezing simultaneous operation mode, the control panel of the refrigerator controls the electromagnetic valve 1 and the electromagnetic valve 2 to be in an electrified positive pulse state at the same time, the high-pressure stage compressor and the low-pressure stage compressor are electrified simultaneously, the power frequency and the voltage are the same, refrigerant from a freezing chamber evaporator enters the low-pressure stage compressor through an air inlet on a shell of the low-pressure stage compressor, the refrigerant is compressed by the low-pressure stage compressor and then is discharged into a cavity of the middle sleeve piece through an exhaust valve of the low-pressure stage compressor, the refrigerant is mixed with the refrigerant from a refrigerating chamber evaporator and then enters the high-pressure stage compressor for compression and discharge, the refrigerant is condensed in a condenser for heat release and then is divided into two parts through a drying filter, one part of the refrigerant enters the refrigerating chamber evaporator for evaporation and heat absorption through the electromagnetic valve 1 and the capillary refrigerating chamber, and one part of the refrigerant enters the freezing chamber evaporator for evaporation and heat absorption through the electromagnetic valve 2 and the freezing chamber capillary tube. And if the refrigerating chamber temperature sensor detects that the temperature of the refrigerating chamber reaches the lower limit of the set value, the control panel disconnects the electromagnetic valve 1, and the refrigerating system stops running. If the freezing chamber temperature sensor detects that the freezing chamber temperature reaches the lower limit of the temperature set value, the control panel disconnects the electromagnetic valve 2, and the freezing and refrigerating system stops running. If the cold storage temperature sensor and the freezing temperature sensor detect that the temperatures of the cold storage chamber and the freezing chamber reach the lower limit of the temperature set value at the same time, the control panel disconnects the power supply of the high-pressure stage compressor and the low-pressure stage compressor, and the refrigerator system stops running. The temperature sensor detects that the temperature reaches the upper limit of the set value, and the operation of starting the refrigerating system is the same as the above.
The control method of the refrigerator using the micro moving-magnet type series two-stage linear compressor provided by the invention can also have the following characteristics: the electromagnetic valve 1, the refrigerating chamber capillary tube and the refrigerating chamber evaporator are connected in series with the liquid storage device 1, the electromagnetic valve 1 is installed in front of the refrigerating chamber capillary tube, and the liquid storage device 1 is installed behind the refrigerating chamber evaporator; solenoid valve 2, freezer capillary, freezer evaporimeter and 2 series connections of reservoir, and solenoid valve 2 is installed before the freezer capillary, and reservoir 2 is installed behind the freezer evaporimeter.
In addition, the method for controlling the refrigerator using the micro moving-magnet type series two-stage linear compressor provided by the invention can also have the following characteristics: the drying filter is arranged behind the condenser and is connected with the condenser in series.
In addition, the method for controlling a refrigerator using a micro moving-magnet type tandem two-stage linear compressor according to the present invention may further include: under the single-freezing operation mode and the cold storage and freezing simultaneous operation mode, the control panel controls the high-pressure stage compressor and the low-pressure stage compressor of the micro moving magnetic type series two-stage linear compressor to input the same power supply, and under the single-freezing operation mode, only the high-pressure stage compressor is started.
In addition, the method for controlling the refrigerator using the micro moving-magnet type series two-stage linear compressor provided by the invention can also have the following characteristics: the freezer capillary tube is longer than the refrigerator capillary tube.
In addition, the method for controlling the refrigerator using the micro moving-magnet type series two-stage linear compressor provided by the invention can also have the following characteristics: the refrigerating chamber temperature sensor is used for detecting the temperature of the refrigerating chamber, and the freezing chamber temperature sensor is used for detecting the temperature of the freezing chamber.
In addition, the method for controlling the refrigerator using the micro moving-magnet type series two-stage linear compressor provided by the invention can also have the following characteristics: the control panel is connected with the electromagnetic valve 1, the electromagnetic valve 2, the refrigerating chamber temperature sensor, the freezing chamber temperature sensor, the high-pressure stage compressor and the low-pressure stage compressor.
Action and Effect of the invention
According to the control method of the refrigerator using the micro moving-magnet type series two-stage linear compressor, the operation of the high-pressure stage compressor and the low-pressure stage compressor and the opening of the electromagnetic valve 1 and the electromagnetic valve 2 are controlled through the control panel, so that the temperature control precision and the efficiency are high.
Furthermore, the control panel is connected with the refrigerating chamber temperature sensor and the freezing chamber temperature sensor, so that the temperatures of the refrigerating chamber and the freezing chamber can be detected, the operating efficiency of the compressor is improved, and the energy consumption is reduced.
Furthermore, because the compressor adopts a miniature moving-magnet type series two-stage linear compressor, the pressure ratio is higher, the refrigerator can prepare lower temperature (-40 to-60 ℃), the refrigeration requirements of some special foods can be met, the storage time is longer, and the freshness is higher.
Furthermore, the micro moving-magnet type series two-stage linear compressor adopted by the invention has high efficiency and is free of oil lubrication. Because the high-pressure stage compressor and the low-pressure stage compressor are arranged oppositely, axial force can be ensured to be balanced more, vibration is greatly reduced, the refrigerator is more stable, noise is lower, and reliability is higher.
Furthermore, under the mode of single freezing operation and freezing and refrigerating simultaneous operation, the high-pressure compressor and the low-pressure compressor are simultaneously started, the same power supply is connected, the refrigerator is small in vibration, and only the high-pressure compressor is started under the refrigerating operation mode, so that the operation efficiency of the refrigerator is improved, and the energy consumption of the refrigerator is reduced.
Further, under the cold storage and freezing simultaneous operation mode, the refrigerant compressed and discharged by the low-pressure stage compressor is mixed with the refrigerant from the refrigerating chamber evaporator in the cavity of the intermediate external member, so that the air suction temperature of the high-pressure stage compressor is reduced, the exhaust temperature of the high-pressure stage compressor is reduced, and the problem caused by overhigh exhaust temperature of the compressor is avoided.
Drawings
Fig. 1 is a control system diagram of a refrigerator using a micro moving-magnet type series two-stage linear compressor according to the present invention;
FIG. 2 is a schematic structural diagram of a micro moving-magnet type tandem two-stage linear compressor used in the present invention;
FIG. 3 is a schematic view of the refrigerant flow in the compressor in a single refrigeration mode of operation according to the present invention;
FIG. 4 is a schematic diagram of the refrigerant flow in the compressor in a single freeze mode of operation according to the present invention;
fig. 5 is a schematic view illustrating the flow of refrigerant in the compressor in the simultaneous cooling and freezing operation mode according to the present invention.
Detailed Description
In order to make the technical means, creation features, achievement objects and effects of the present invention easy to understand, the following embodiments specifically explain a control method of a refrigerator using a micro moving-magnet type series two-stage linear compressor according to the present invention with reference to the accompanying drawings.
The embodiment is as follows:
as shown in fig. 1, a control method for a refrigerator using a micro moving magnet type series two-stage linear compressor comprises a refrigerator system and a control system, wherein the refrigerator system comprises a refrigeration system and a freezing refrigeration system, the refrigeration system and the freezing refrigeration system are simultaneously driven by one micro moving magnet type series two-stage linear compressor 1, and in addition, a drying filter and a condenser are also used as common components of the refrigeration system and the freezing refrigeration system.
As shown in fig. 2 to 5, the micro moving-magnet tandem two-stage linear compressor 1 includes a low-pressure stage compressor 101, an intermediate sleeve 102, and a high-pressure stage compressor 103, and the high-pressure stage compressor 103 and the low-pressure stage compressor 101 are arranged to be opposed to each other and fixed to the intermediate sleeve 102 by screws.
The low-pressure stage compressor 101 has a power supply interface and an air inlet 2 arranged on the housing.
The intermediate sleeve 102 is provided with an exhaust port and an intake port 1.
The high-pressure stage compressor 103 is provided with a power interface on the shell.
The control system comprises a control panel 12, an electromagnetic valve 1 (8), an electromagnetic valve 2 (9), a refrigerating chamber temperature sensor 13, a freezing chamber temperature sensor 14 and a micro moving-magnetic type series two-stage linear compressor 1.
The refrigerating and refrigerating system comprises a miniature moving-magnetic type series two-stage linear compressor 1, a condenser 6, a drying filter 7, a refrigerating chamber capillary tube 10, a refrigerating chamber evaporator 4 and a liquid storage device 1 (3), wherein an electromagnetic valve 1 (8), the refrigerating chamber capillary tube 10, the refrigerating chamber evaporator 4 and the liquid storage device 1 (3) are connected in series, the electromagnetic valve 1 (8) is installed in front of the refrigerating chamber capillary tube 10, and the liquid storage device 1 (3) is installed behind the refrigerating chamber evaporator 4.
Freezing refrigerating system includes miniature moving-magnet type tandem two-stage linear compressor 1, condenser 6, dry filter 7, freezing chamber capillary 11, freezing chamber evaporator 5 and reservoir 2 (2), solenoid valve 2 (9), freezing chamber capillary 11, freezing chamber evaporator 5 and reservoir 2 (2) are established ties, solenoid valve 2 (9) are installed before freezing chamber capillary 11, reservoir 2 (2) are installed behind freezing chamber evaporator 5.
The freezing chamber capillary tube 11 is longer than the refrigerating chamber capillary tube 10.
The working process of the miniature moving-magnetic type series two-stage linear compressor 1 is as follows: the refrigerant from the freezing chamber evaporator 5 enters a suction cavity of the low-pressure stage compressor through a suction port 2 on a shell of the low-pressure stage compressor 101, enters a compression cavity of the low-pressure stage compressor through a suction channel and a suction valve plate on a piston, the piston oscillates in a reciprocating manner to compress refrigerant gas, the refrigerant gas is discharged by a discharge valve, the refrigerant gas is mixed with the refrigerant from the refrigerating chamber evaporator 4 in the intermediate sleeve 102, and meanwhile, the refrigerant gas exchanges heat with the environment through the intermediate sleeve 102 to reduce the suction temperature of the high-pressure stage compressor 103, then the mixed refrigerant enters the suction cavity of the high-pressure stage compressor 103 through a suction port on the integral frame of the high-pressure stage compressor 103, enters the compression cavity of the high-pressure stage compressor 103 through the suction channel and the suction valve plate of the piston of the high-pressure stage compressor 103, and the compressed refrigerant is discharged from a discharge port of the intermediate sleeve 102 through the discharge valve and a discharge pipe of the high-pressure stage compressor 103 and enters the condenser 6.
A control method of a refrigerator using a micro moving-magnetic type series two-stage linear compressor controls three operation modes of a refrigerator system through a control panel 12: single refrigeration operation, single freezing operation and simultaneous operation of refrigeration and freezing.
In the single refrigeration operation mode, the flow condition of the refrigerant in the compressor 1 is as shown in fig. 3, the control board 12 of the refrigerator makes the electromagnetic valve 1 (8) in the energized positive pulse state, the electromagnetic valve 2 (9) is not energized and is in the closed state, meanwhile, the control board 12 makes the high-pressure stage compressor 103 energized and the low-pressure stage compressor 101 not energized and is in the closed state, the refrigerant enters the cavity of the intermediate kit from the air inlet 1 on the intermediate kit 102, is compressed and discharged through the high-pressure stage compressor 103, enters the condenser 6, then enters the refrigeration chamber evaporator 4 through the drying filter 7, the electromagnetic valve 1 (8) and the refrigeration chamber capillary tube 10, and the refrigerant evaporates and absorbs heat, and then completes a refrigeration cycle. The refrigerating chamber temperature sensor 13 detects the temperature of the refrigerating chamber, the circulation loop operates until the refrigerating chamber temperature reaches the lower limit of the set value of the refrigerating chamber temperature, the control panel 12 cuts off the power supply of the high-pressure stage compressor 103, and the temperature rises after the shutdown. If the refrigerating chamber temperature sensor 13 detects that the refrigerating chamber temperature reaches the upper limit of the refrigerating chamber temperature set value, the control panel 12 controls the high-pressure stage compressor 103 to be electrified, and the circulation loop continues to operate.
In the single-freezing operation mode, the flow condition of the refrigerant in the compressor 1 is as shown in fig. 4, the control board 12 of the refrigerator controls the electromagnetic valve 2 (9) to be in a powered positive pulse state, the electromagnetic valve 1 (8) is not powered and is in a closed state, meanwhile, the control board 12 controls the high-pressure stage compressor 103 and the low-pressure stage compressor 101 to be powered on together with the same frequency and the same voltage, the high-pressure stage compressor 103 and the low-pressure stage compressor 101 operate simultaneously, the pistons of the high-pressure stage compressor 103 and the low-pressure stage compressor 101 move the same, vibration is greatly counteracted, and reliability is increased. Refrigerant from the freezing chamber evaporator 5 enters the compressor 1 through the air inlet 2 on the shell of the low-pressure stage compressor 101, is discharged through two-stage compression of the high-pressure stage compressor 103 and the low-pressure stage compressor 101, enters the condenser 6, then enters the freezing chamber evaporator 5 through the dry filter 7, the electromagnetic valve 2 (9) and the freezing chamber capillary tube 11, evaporates and absorbs heat, and then completes a refrigeration cycle. The freezing chamber temperature sensor 14 detects the freezing chamber temperature, the circulation loop operates until the freezing chamber temperature is detected to reach the lower limit of the freezing chamber temperature set value, the control panel 12 disconnects the power supply of the high-pressure stage compressor 103 and the low-pressure stage compressor 101, and the temperature rises after the shutdown. If the freezing chamber temperature sensor 14 detects that the freezing chamber temperature reaches the upper limit of the set freezing chamber temperature value, the control board 12 controls the high-pressure stage compressor 103 and the low-pressure stage compressor 101 to be powered on, and the circulation loop is continued.
In the cold storage and freezing simultaneous operation mode, the flow condition of the refrigerant in the compressor 1 is as shown in fig. 5, the control board 12 of the refrigerator controls the electromagnetic valve 1 (8) and the electromagnetic valve 2 (9) to be in the power-on positive pulse state at the same time, the high-pressure stage compressor 103 and the low-pressure stage compressor 101 are powered on at the same time, and the power frequency and the voltage are the same. Refrigerant from the freezing chamber evaporator 5 enters the low-pressure stage compressor 101 through the air inlet 2 on the shell of the low-pressure stage compressor 101, is compressed by the low-pressure stage compressor 101 and then is discharged into the cavity of the intermediate sleeve 102 through the air outlet valve of the low-pressure stage compressor 101, is mixed with the refrigerant from the refrigerating chamber evaporator 4 entering the intermediate sleeve 102 from the air inlet 1, then enters the high-pressure stage compressor 103 and is compressed and discharged. The refrigerant is condensed in the condenser 6 to release heat, then is divided into two parts through the drying filter 7, one part of the refrigerant enters the refrigerating chamber evaporator 4 through the electromagnetic valve 1 (8) and the refrigerating chamber capillary tube 10 to be evaporated and absorb heat, and the other part of the refrigerant enters the freezing chamber evaporator 5 through the electromagnetic valve 2 (9) and the freezing chamber capillary tube 11 to be evaporated and absorbed heat. If the refrigerating chamber temperature sensor 13 detects that the refrigerating chamber temperature reaches the lower limit of the set value, the control panel 12 disconnects the electromagnetic valve 1 (8), and the refrigerating and refrigerating system stops running. If the freezing chamber temperature sensor 14 detects that the freezing chamber temperature reaches the lower limit of the temperature set value, the control panel 12 disconnects the electromagnetic valve 2 (9), and the freezing and refrigerating system stops running. If the cold storage temperature sensor and the freezing temperature sensor simultaneously detect that the temperatures of the cold storage chamber and the freezing chamber reach the lower limit of the temperature set value, the control panel 12 disconnects the power supply of the high-pressure stage compressor 103 and the low-pressure stage compressor 101, and the refrigerator system stops running. And the temperature sensor detects that the temperature reaches the upper limit of the set value, and the operation of starting the refrigeration system is the same as the above.
Action and effect of the examples:
according to the control method of the refrigerator using the micro moving-magnet type series two-stage linear compressor, the operation of the high-pressure stage compressor 103 and the low-pressure stage compressor 101 and the opening of the electromagnetic valves 1 (8) and 2 (9) are controlled through the control panel 12, so that the control precision and the efficiency are high.
Further, the control panel 12 is connected with the refrigerating chamber temperature sensor 13 and the freezing chamber temperature sensor 14, so that the refrigerating and freezing chamber temperatures can be detected, the operating efficiency of the compressor 1 is improved, and the energy consumption is reduced.
Furthermore, because the compressor 1 adopts a miniature moving-magnet type series two-stage linear compressor, the pressure ratio is higher, the refrigerator can prepare lower temperature (-40 to-60 ℃), the refrigeration requirements of some special foods can be met, the storage time is longer, and the freshness is higher.
Furthermore, the micro moving-magnet type series two-stage linear compressor adopted by the invention has high efficiency and is free of oil lubrication. Because the high-pressure stage compressor 103 and the low-pressure stage compressor 101 are arranged oppositely, the axial force can be ensured to be balanced more, the vibration is greatly reduced, the refrigerator is more stable, the noise is lower, and the reliability is higher.
Furthermore, in the single-freezing operation mode and the freezing and refrigerating simultaneous operation mode, the high-pressure stage compressor 103 and the low-pressure stage compressor 101 are simultaneously started, the same power supply is connected, the refrigerator is small in vibration, and in the refrigerating operation mode, only the high-pressure stage compressor 103 is started, so that the operation efficiency of the refrigerator is improved, and the energy consumption of the refrigerator is reduced.
Further, in the simultaneous refrigerating and freezing operation mode, the refrigerant discharged by the low-pressure stage compressor 101 is mixed with the refrigerant from the refrigerating chamber evaporator 4 in the cavity of the intermediate kit 102, so that the suction temperature of the high-pressure stage compressor 103 is reduced, the discharge temperature of the high-pressure stage compressor 103 is reduced, and the problem caused by the overhigh discharge temperature of the compressor 1 is avoided.
Claims (4)
1. A control method for a refrigerator using a micro moving-magnet type series two-stage linear compressor is characterized by comprising the following steps:
the refrigerator system comprises a refrigeration system and a freezing refrigeration system;
the control system comprises a micro moving-magnetic type series two-stage linear compressor, an electromagnetic valve 1, an electromagnetic valve 2, a control panel, a refrigerating chamber temperature sensor and a freezing chamber temperature sensor;
the miniature moving-magnetic type series two-stage linear compressor comprises a low-pressure stage compressor, a middle external member and a high-pressure stage compressor, wherein the high-pressure stage compressor and the low-pressure stage compressor are oppositely arranged and are fixed on the middle external member through screws;
a power supply interface and an air inlet 2 are arranged on the low-pressure stage compressor shell;
the middle sleeve is provided with an air outlet and an air inlet 1;
the refrigerating and refrigerating system comprises a micro moving-magnetic type series two-stage linear compressor, a condenser, a drying filter, a refrigerating chamber capillary tube, a refrigerating chamber evaporator and a liquid storage device 1, wherein the electromagnetic valve 1, the refrigerating chamber capillary tube and the refrigerating chamber evaporator are connected in series with the liquid storage device 1, the electromagnetic valve 1 is installed in front of the refrigerating chamber capillary tube, and the liquid storage device 1 is installed behind the refrigerating chamber evaporator;
the refrigerating and refrigerating system comprises a miniature moving-magnetic type series two-stage linear compressor, a condenser, a drying filter, a freezing chamber capillary tube, a freezing chamber evaporator and a liquid storage device 2, wherein the electromagnetic valve 2, the freezing chamber capillary tube and the freezing chamber evaporator are connected with the liquid storage device 2 in series, the electromagnetic valve 2 is installed in front of the freezing chamber capillary tube, and the liquid storage device 2 is installed behind the freezing chamber evaporator;
the freezing chamber capillary tube is longer than the refrigerating chamber capillary tube;
the electromagnetic valve 1 is arranged in front of the refrigerating chamber capillary tube, and the electromagnetic valve 2 is arranged in front of the freezing chamber capillary tube;
the control panel links to each other with solenoid valve 1, solenoid valve 2, cold-storage room temperature sensor, freezer temperature sensor and linear compressor, and the opening and closing of the steerable solenoid valve 1 of control panel and solenoid valve 2 and the opening and stopping of low pressure level compressor and high-pressure level compressor realize three kinds of operational modes of refrigerator system: single refrigeration operation, single freeze operation and simultaneous refrigeration and freeze operation modes.
2. The control method of a refrigerator using a micro moving-magnet type series two-stage linear compressor according to claim 1, wherein:
when the single refrigeration running mode is adopted, the control panel of the refrigerator enables the electromagnetic valve 1 to be in an electrified positive pulse state, the electromagnetic valve 2 is not electrified and is in a closed state, meanwhile, the control panel enables the high-pressure stage compressor to be electrified, the low-pressure stage compressor is not electrified and is in a closed state, and a refrigerant enters the cavity of the middle sleeve from the air inlet 1 on the middle sleeve and is compressed and discharged through the high-pressure stage compressor.
3. The control method of a refrigerator using a micro moving-magnet type tandem two-stage linear compressor according to claim 1, wherein:
when the refrigerator is in a single-freezing operation mode, the control panel of the refrigerator controls the electromagnetic valve 2 to be in a power-on positive pulse state, the electromagnetic valve 1 is not powered on and is in a closed state, the control panel controls the high-pressure stage compressor and the low-pressure stage compressor to be connected with a power supply with the same frequency and the same voltage together, and the high-pressure stage compressor and the low-pressure stage compressor operate simultaneously; the high-pressure stage compressor and the low-pressure stage compressor have the same piston motion, and refrigerant from the freezing chamber evaporator enters the compressor through the air inlet 2 on the shell of the low-pressure stage compressor and is discharged through two-stage compression of the high-pressure stage compressor and the low-pressure stage compressor.
4. The control method of a refrigerator using a micro moving-magnet type series two-stage linear compressor according to claim 1, wherein:
when the refrigerator is in a cold storage and freezing simultaneous operation mode, the control panel of the refrigerator controls the electromagnetic valve 1 and the electromagnetic valve 2 to be in an electrified positive pulse state at the same time, the high-pressure stage compressor and the low-pressure stage compressor are electrified at the same time, the power frequency and the voltage are the same, refrigerant from the freezing chamber evaporator enters the low-pressure stage compressor through the air inlet 2 on the shell of the low-pressure stage compressor, the refrigerant is compressed by the low-pressure stage compressor and then is discharged into the cavity of the middle suite through the exhaust valve of the low-pressure stage compressor, and the refrigerant is mixed with the refrigerant from the refrigerating chamber evaporator entering the middle suite from the air inlet 1 and then enters the high-pressure stage compressor to be compressed and discharged.
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| JP3847493B2 (en) * | 1999-09-01 | 2006-11-22 | 松下冷機株式会社 | Two-stage compression refrigeration system |
| JP2005140483A (en) * | 2003-11-10 | 2005-06-02 | Toshiba Corp | Refrigerator |
| CN1959298A (en) * | 2006-11-24 | 2007-05-09 | 中国科学院上海技术物理研究所 | Stirling refrigerating machine being as cold source of low temperature refrigerator |
| CN105241174B (en) * | 2015-11-05 | 2018-02-02 | 青岛海尔股份有限公司 | Using the controlling method for refrigerator and control system of linear compressor |
| CN211777873U (en) * | 2020-02-25 | 2020-10-27 | 中国科学院理化技术研究所 | Square linear compressor |
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