CN113983733B - Refrigerator and refrigeration control method thereof - Google Patents
Refrigerator and refrigeration control method thereof Download PDFInfo
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- CN113983733B CN113983733B CN202110483102.3A CN202110483102A CN113983733B CN 113983733 B CN113983733 B CN 113983733B CN 202110483102 A CN202110483102 A CN 202110483102A CN 113983733 B CN113983733 B CN 113983733B
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- refrigeration
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- refrigerator
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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
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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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention relates to a refrigerator and a refrigeration control method thereof, wherein the refrigerator comprises a refrigerator body and a refrigeration system; the refrigeration system has a first refrigeration mode and a second refrigeration mode; in the refrigerating system, a condenser is connected with a compressor, a refrigeration evaporator is connected with the condenser, the refrigeration evaporator comprises a first refrigerating section and a second refrigerating section, the second refrigerating section is connected with the compressor, a control valve is connected with the refrigeration evaporator and respectively connected with the first refrigerating section and the second refrigerating section, and the control valve controls a refrigerant to flow through the first refrigerating section and the second refrigerating section in a first refrigerating mode and only flow through the second refrigerating section in a second refrigerating mode. The first refrigerating section is matched with the second refrigerating section, so that the refrigerating system is switched between a first refrigerating mode and a second refrigerating mode, the refrigerating efficiency of the refrigerating evaporator is selectively controlled, the problem of low starting rate in a low-temperature environment is solved, and the refrigerating of the refrigerating chamber and the freezing chamber is effectively maintained when a refrigerating capacity test or a heat load is added to the freezing chamber is facilitated.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a refrigerator and a refrigeration control method thereof.
Background
Refrigerators have become one of indispensable home appliances as a common refrigeration apparatus. The working principle of the refrigerator is that the refrigerant is compressed by a compressor to form high-temperature and high-pressure refrigerant gas, then condensed and depressurized by a condenser to form high-pressure liquid, throttled and depressurized by a capillary tube, and then conveyed to an evaporator for evaporation and refrigeration, and the refrigerated low-temperature and low-pressure refrigerant returns to the compressor by an air return pipeline to form refrigeration cycle.
In a single-system direct-cooling refrigerating and freezing refrigerator, on one hand, in order to solve the problem of low starting rate of a compressor at low temperature, a heating wire for heating is usually added in a refrigerating chamber, and the temperature is controlled by a temperature sensing head at the back of the refrigerating chamber, so that the refrigerating temperature is increased by heating the heating wire, and further the starting time of the compressor can be prolonged, thereby enabling the freezing temperature to meet corresponding temperature requirements. On the other hand, when the freezing capacity test is performed, a heat load is required to be placed in the freezing chamber, and as the freezing chamber is a tube-wound evaporator, the heat load can heat the refrigerant in the tube, the heated refrigerant flows through the refrigeration evaporator, the temperature sensing head is heated, the starting time of the compressor can be very long, and the refrigeration temperature is directly lower than 0 ℃. At this time, a magneto-sensitive switch and a heating wire are required to be added, and the refrigerating temperature is increased by heating the heating wire.
However, the scheme of compensating the temperature of the refrigerating compartment by heating the heating wire may cause consumption of electricity and is not environment-friendly; for the magnetic switch added by putting the heat load into the freezing chamber, the temperature is easily sensed inaccurately due to the position where the heat load is put, and the like, so that the heating wire is abnormally opened, and the power consumption is increased.
Disclosure of Invention
The invention aims to provide a refrigerator and a refrigeration control method thereof, which are used for optimizing a refrigeration system of the refrigerator in the prior art to cancel a heating wire, so that the refrigeration of the refrigerator is safer and more environment-friendly.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to one aspect of the present invention, there is provided a refrigerator including: the refrigerator comprises a box body, a refrigerating chamber and a refrigerating chamber, wherein the box body is internally provided with a freezing chamber and a refrigerating chamber which are mutually separated; a refrigeration system configured to have a first refrigeration mode and a second refrigeration mode, the refrigeration system comprising: a compressor; the inlet of the condenser is connected with the air outlet of the compressor; the refrigerating evaporator is used for providing cold energy for the refrigerating chamber, and an inlet of the refrigerating evaporator is connected with an outlet of the condenser; the refrigerating evaporator is used for providing cold energy for the refrigerating chamber and comprises a first refrigerating section and a second refrigerating section connected in series at the downstream of the first refrigerating section, and the downstream of the second refrigerating section is connected with an air return port of the compressor; and a control valve arranged between the freezing evaporator and the refrigerating evaporator; the control valve is connected with the outlet of the freezing evaporator and is respectively connected with the upstream of the first refrigerating section and the upstream of the second refrigerating section; the control valve is used for controlling a pipeline in the refrigeration evaporator so that the refrigerant flowing out of the refrigeration evaporator can sequentially flow through the first refrigeration section and the second refrigeration section in the first refrigeration mode and can only flow through the second refrigeration section in the second refrigeration mode.
According to some embodiments of the present application, the control valve has a first inlet, a first outlet, and a second outlet; the first inlet is connected with an outlet of the freezing evaporator, the first outlet is connected with an upstream end of the first refrigerating section, and the second outlet is connected with a joint between the first refrigerating section and the second refrigerating section; wherein in the first cooling mode, the first outlet is open and the second outlet is closed; in the second cooling mode, the first outlet is closed and the second outlet is opened.
According to some embodiments of the present application, the control valve comprises a first control valve and a second control valve; a first branch is arranged between the outlet of the freezing evaporator and the first refrigerating section, and the first control valve is arranged on the first branch; a second branch is arranged between the outlet of the freezing evaporator and the second refrigerating section, and the second control valve is arranged on the second branch; wherein in the first cooling mode, the first control valve opens the first branch and the second control valve closes the second branch; in the second cooling mode, the first control valve closes the first branch, and the second control valve opens the second branch.
According to some embodiments of the present application, the refrigeration system further comprises a tee disposed at a junction between the first refrigeration segment and the second refrigeration segment; the tee pipe is provided with a first port, a second port and a third port; the first port is connected with the control valve, the second port is connected with the downstream of the first refrigeration section, and the third port is connected with the upstream of the second refrigeration section.
According to some embodiments of the application, a first liner and a second liner which are separated are arranged in the refrigerator; the freezing chamber is formed in the first inner container, and the refrigerating chamber is formed in the second inner container; the freezing evaporator is contacted with the outer wall of the first liner.
According to some embodiments of the application, the freezing evaporator is wound on the outer peripheral wall of the first liner.
According to some embodiments of the application, the refrigeration evaporator is attached to the outer wall of the second liner.
According to another aspect of the present invention, there is also provided a refrigeration control method of a refrigerator, the refrigeration control method including the steps of: acquiring the external environment temperature of the refrigerator; comparing the acquired external environment temperature with a set first temperature threshold; when the external environment temperature is greater than a set first temperature threshold, the refrigerating system adopts a first refrigerating mode, so that the refrigerant can sequentially flow through the first refrigerating section and the second refrigerating section, and the first refrigerating section and the second refrigerating section can jointly provide cold energy for the refrigerating chamber; when the external environment temperature is smaller than the set first temperature threshold, the refrigeration system adopts a second refrigeration mode, so that the refrigerant only flows through the second refrigeration section, and the second refrigeration section independently provides cold for the refrigerating chamber.
According to still another aspect of the present invention, there is also provided a refrigeration control method of a refrigerator, the refrigeration control method including the steps of: respectively acquiring temperatures of a freezing chamber and a refrigerating chamber in the refrigerator; comparing the acquired temperature of the freezing chamber with a set second temperature threshold value, and comparing the acquired temperature of the refrigerating chamber with a set third temperature threshold value; when the temperature of the freezing chamber is higher than a second temperature threshold value and the temperature of the refrigerating chamber is lower than a third temperature threshold value, the refrigerating system adopts a second refrigerating mode, so that the refrigerant only flows through the second refrigerating section, and the second refrigerating section independently provides cold for the refrigerating chamber; when the temperature of the freezing chamber is lower than the second temperature threshold value or the temperature of the refrigerating chamber is higher than the third temperature threshold value, the refrigerating system adopts a first refrigerating mode, so that the refrigerant can sequentially flow through the first refrigerating section and the second refrigerating section, and the first refrigerating section and the second refrigerating section can jointly provide cold energy for the refrigerating chamber.
According to still another aspect of the present invention, there is also provided a refrigeration control method of a refrigerator, the refrigeration control method including the steps of: setting a first shutdown temperature and a second shutdown temperature corresponding to the compressor aiming at the set regulation temperature of the refrigerator, wherein the second shutdown temperature is smaller than the first shutdown temperature; acquiring a set regulating temperature of the refrigerator; judging a refrigeration mode of the refrigeration system; when the refrigeration system operates in the first refrigeration mode, the shutdown temperature of the compressor adopts the first shutdown temperature; the shutdown temperature of the compressor adopts a second shutdown temperature when the refrigeration system is operating in the second refrigeration mode.
As can be seen from the technical scheme, the embodiment of the invention has at least the following advantages and positive effects:
in the refrigerator provided by the embodiment of the invention, the structures of the first refrigeration section and the second refrigeration section of the refrigeration evaporator are utilized to be matched with the compressor, the condenser, the refrigeration evaporator and the control valve, so that the refrigeration system is provided with two different refrigeration loops, and a first refrigeration mode and a second refrigeration mode are correspondingly formed.
In the first refrigeration mode, enabling a refrigerant to sequentially flow through the first refrigeration section and the second refrigeration section of the refrigeration evaporator, and utilizing the first refrigeration section and the second refrigeration section to jointly refrigerate; simultaneously, the second refrigeration mode enables the refrigerant to flow through the second refrigeration section of the refrigeration evaporator, only the second refrigeration section is used for independent refrigeration, and the refrigeration efficiency of the refrigeration chamber is reduced, so that the refrigeration efficiency of the refrigeration evaporator is selectively controlled, the refrigeration efficiency of the refrigeration chamber is reduced in a low-temperature environment, the starting rate of the compressor is improved, and the problem of low starting rate in the low-temperature environment is effectively solved. And meanwhile, when the freezing capacity test is carried out or the heat load is added into the freezing chamber, the second refrigeration mode can be adopted, so that the refrigeration of the refrigerating chamber and the freezing chamber is effectively maintained, the freezing capacity test is carried out smoothly, and the temperature of the refrigerating chamber is effectively prevented from being too low.
Compared with the existing solution of heating by a heating wire to raise the refrigerating temperature, the scheme does not need to additionally increase power consumption, can more scientifically and reasonably utilize energy, and ensures that the refrigeration of the refrigerator is safer and more environment-friendly.
Drawings
Fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention.
Fig. 2 is a control schematic diagram of a refrigerating system of the refrigerator of fig. 1.
Fig. 3 is an enlarged schematic view of the area a in fig. 2.
Fig. 4 is an enlarged schematic view of region B in fig. 2.
Fig. 5 is another control schematic of a refrigerating system of the refrigerator of fig. 1.
The reference numerals are explained as follows:
1. a case; 11. a first liner; 12. a second liner; 13. a door body; 2. a compressor; 3. a condenser; 4. drying the filter; 5. a throttle; 6. a freezing evaporator; 7. a refrigerated evaporator; 71. a first refrigeration section; 72. a second refrigeration section; 73. a three-way pipe; 731. a first port; 732. a second port; 733. a third port; 81. a first control valve; 811. a first inlet; 812. a first outlet; 813. a second outlet; 82. a second control valve; 83. a third control valve; 91. a first branch; 92. a second branch.
Detailed Description
Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the invention.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In a single-system direct-cooling refrigerating and freezing refrigerator, on one hand, in order to solve the problem of low starting rate of a compressor at low temperature, a heating wire for heating is usually added in a refrigerating chamber, and the temperature is controlled by a temperature sensing head at the back of the refrigerating chamber, so that the refrigerating temperature is increased by heating the heating wire, and further the starting time of the compressor can be prolonged, thereby enabling the freezing temperature to meet corresponding temperature requirements. On the other hand, when the freezing capacity test is performed, a heat load is required to be placed in the freezing chamber, and as the freezing chamber is a tube-wound evaporator, the heat load can heat the refrigerant in the tube, the heated refrigerant flows through the refrigeration evaporator, the temperature sensing head is heated, the starting time of the compressor can be very long, and the refrigeration temperature is directly lower than 0 ℃. At this time, a magneto-sensitive switch and a heating wire are required to be added, and the refrigerating temperature is increased by heating the heating wire.
However, the scheme of compensating the temperature of the refrigerating compartment by heating the heating wire may cause consumption of electricity and is not environment-friendly; for the magnetic switch added by putting the heat load into the freezing chamber, the temperature is easily sensed inaccurately due to the position where the heat load is put, and the like, so that the heating wire is abnormally opened, and the power consumption is increased.
Fig. 1 is a schematic view of a refrigerator according to an embodiment of the present invention.
Referring to fig. 1, a refrigerator provided by an embodiment of the present invention mainly includes a case 1 and a refrigeration system disposed in the case 1.
The case 1 adopts a cuboid structure, and it can be appreciated that the case 1 may also adopt other shapes such as square, cylindrical, etc.
A first liner 11 and a second liner 12 which are separated from each other can be arranged in the box body 1. The first liner 11 forms a freezing chamber, and the second liner 12 forms a refrigerating chamber. The first liner 11 is located above the second liner 12, so that the freezing chamber and the refrigerating chamber are separated up and down. It is understood that the first liner 11 may be disposed below the second liner 12, that is, the freezing chamber is disposed at the lower portion in the case 1, the refrigerating chamber is disposed above the freezing chamber, or the first liner 11 may be disposed at a left-right interval with the second liner 12.
In some embodiments, one or more shelves are disposed in the first liner 11 and the second liner 12, so that a plurality of barriers are formed in the freezing chamber and the refrigerating chamber respectively, so that the space inside the first liner 11 and the second liner 12 is fully utilized, and the foods are classified and placed according to the types of the foods.
The front side of the box body 1 is opened, and the front side of the box body 1 is provided with a door body 13, wherein the door body 13 is used for opening and closing a corresponding refrigeration compartment, namely a refrigerating compartment or a freezing compartment. The door body 13 and the box body 1 can be connected through a hinge, so that the door body 13 of the refrigerator can rotate around the axis, the door body 13 of the refrigerator can be opened and closed, and the corresponding refrigeration compartment is opened and closed. It is understood that the door 13 may be provided in plurality and in one-to-one correspondence with the refrigerating compartments. One door 13 may also open and close a plurality of refrigerating compartments simultaneously.
Fig. 2 is a control schematic diagram of a refrigerating system of the refrigerator of fig. 1. Fig. 3 is an enlarged schematic view of the area a in fig. 2.
Referring to fig. 2 in combination with fig. 1, the refrigeration system in the present embodiment includes a compressor 2, a condenser 3, a dry filter 4, a throttle 5, a freeze evaporator 6, a refrigeration evaporator 7, and a first control valve 81.
Referring to fig. 2, a compressor 2 is installed in a box 1, a compressor 2 bin is disposed in the box 1, and the compressor 2 is installed in the compressor 2 bin. The compressor 2 is configured to compress refrigerant vapor to form high-temperature, high-pressure refrigerant vapor.
The compressor 2 has an exhaust port and a return air port, and the compressed high-temperature and high-pressure refrigerant vapor flows out of the compressor 2 from the exhaust port, and the refrigerant returns to the compressor 2 through the return air port after refrigeration.
Still referring to fig. 2, a condenser 3 is installed in the case 1 for condensing the high-temperature, high-pressure refrigerant flowing out of the compressor 2. The inlet of the condenser 3 is connected with the exhaust port of the compressor 2, and the high-temperature and high-pressure refrigerant flowing out of the compressor 2 can flow into the condenser 3 and be condensed into a medium-temperature and high-pressure liquid refrigerant by the condenser 3.
Still referring to fig. 2, a filter drier 4 is disposed in the housing 1 and downstream of the condenser 3, and an inlet of the filter drier 4 is connected to an outlet of the condenser 3. The filter drier 4 plays a role in filtering impurities, and a desiccant is arranged in the filter drier 4 and can be used for absorbing moisture in the refrigerant.
Still referring to fig. 2, a throttle 5 is disposed in the case 1, and an inlet of the throttle 5 is connected to an outlet of the dry filter 4, respectively. The restrictor 5 is used for restricting and reducing pressure of the medium-temperature and high-pressure liquid refrigerant and converting the medium-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure refrigerant steam. It will be appreciated that the restrictor 5 may be a capillary tube.
The freezing evaporator 6 and the refrigerating evaporator 7 are both arranged in the box body 1 and are connected with the outlet of the throttle 5. The low-temperature and low-pressure refrigerant steam enters the freezing evaporator 6 and the refrigerating evaporator 7 to be evaporated and boiled, absorbs heat of surrounding media, and further refrigerates the freezing chamber and the refrigerating chamber respectively.
Still referring to fig. 2, the freezing evaporator 6 is disposed corresponding to the first liner 11 for providing cold to the freezing chamber in the first liner 11. In the direct-cooling refrigerating and freezing refrigerator, the freezing evaporator 6 adopts a tube-wound evaporator which is wound on the outer peripheral wall of the first liner 11. When the refrigerant evaporates on the inner wall of the refrigeration evaporator 6, the refrigerant can directly absorb heat in the refrigeration chamber from the inner wall of the first liner 11, thereby forming the refrigeration evaporator 6 for direct cooling. It will be appreciated that the temperature in the freezer compartment will also directly affect the refrigerant in the lines of the freeze evaporator 6. The freezing evaporator 6 is not limited to a direct-cooling type, and an indirect-cooling type may be used.
Referring to fig. 2 and 3, the refrigeration evaporator 7 is disposed corresponding to the second liner 12 for providing cold to the refrigeration chamber in the second liner 12. The refrigerating evaporator 7 is provided downstream of the freezing evaporator 6, and the refrigerant flowing out of the freezing evaporator 6 can enter the refrigerating evaporator 7 to evaporate and boil, and can absorb heat of surrounding medium, and the refrigerating chamber can refrigerate. In the single-system refrigerator, the refrigerating evaporator 7 may be connected in series downstream of the freezing evaporator 6 to achieve sufficient and reasonable use of the energy of the refrigerant in the refrigerating system for refrigerating, because the refrigerating chamber requires less cooling than the freezing chamber.
Referring to fig. 2, in some embodiments, the refrigeration evaporator 7 and the second liner 12 are plate-tube evaporators, that is, the refrigeration evaporator tubes are coiled on the outer wall of the second liner 12, so as to directly refrigerate the refrigeration chamber in the second liner 12, thereby forming the direct-cooling type refrigeration evaporator 7. The refrigeration evaporator 7 is not limited to a direct-cooling type, and an indirect-cooling type may be used.
Still referring to fig. 2, the refrigeration evaporator 7 includes a first refrigeration segment 71 and a second refrigeration segment 72 connected in series. The first cooling section 71 is located upstream of the second cooling section 72, and the downstream port of the first cooling section 71 is connected to the upstream port of the second cooling section 72. Meanwhile, a first branch 91 is formed between the upstream port of the first cooling section 71 and the downstream outlet of the freezing evaporator 6, and a second branch 92 is formed between the upstream port of the second cooling section 72 and the downstream outlet of the freezing evaporator 6, i.e., the upstream port of the first cooling section 71 and the upstream port of the second cooling section 72 may be connected to the downstream outlet of the freezing evaporator 6, respectively.
Thus, the refrigerant flowing out of the freezing evaporator 6 can selectively enter the first cooling section 71 and the second cooling section 72 of the refrigerating evaporator 7 in order from the first branch 91, and the refrigerating chamber is cooled by the first cooling section 71 and the second cooling section 72. Or alternatively from the second branch 92 directly into the second refrigeration section 72 of the refrigerated evaporator 7, the refrigeration being performed solely for the refrigerated compartment using only the second refrigeration section 72.
It will be appreciated that the refrigeration efficiency of the first and second refrigeration segments 71, 72 for simultaneously refrigerating the fresh food compartment may be significantly higher than the refrigeration efficiency of the second refrigeration segment 72 alone for refrigerating the fresh food compartment. Accordingly, the present embodiment provides a refrigerating system of a refrigerator that can control and adjust refrigerating efficiency of a refrigerating compartment by switching the first branch 91 and the second branch 92.
Referring to fig. 3, in some embodiments, a tee 73 is provided at the junction of the first and second cooling sections 71, 72. The tee 73 has a first port 731, a second port 732, and a third port 733.
Wherein the first port 731 is connected to the second branch 92 and is directly connected to the downstream outlet of the freeze evaporator 6 through the second branch 92. The second port 732 is connected to the downstream port of the first cooling section 71 and the third port 733 is connected to the upstream of the second cooling section 72. The tee 73 serves to connect the second cooling section 72 to the first cooling section 71 and the second branch 92, respectively.
Fig. 4 is an enlarged schematic view of region B in fig. 2.
Referring to fig. 2 in combination with fig. 4, a first control valve 81 is provided at the junction between the first branch 91 and the second branch 92 and downstream of the freezing evaporator 6, for controlling the flow of refrigerant from the freezing evaporator 6 to either the first branch 91 or the second branch 92.
The first control valve 81 has a first inlet 811, a first outlet 812 and a second outlet 813. Wherein the first inlet 811 is connected to the downstream outlet of the freeze evaporator 6. The first outlet 812 is connected to the first branch 91 and is connected to the upstream port of the first cooling section 71 via the first branch 91. The second outlet 813 is connected to the second branch 92 and to the junction between the first cooling section 71 and the second cooling section 72 via the second branch 92, i.e. to the upstream port of the second cooling section 72 via the second branch 92.
The first control valve 81 can selectively control the first outlet 812 to be opened and the second outlet 813 to be closed, or control the first outlet 812 to be closed and the second outlet 813 to be opened, so as to realize selective switching between the first branch 91 and the second branch 92.
Fig. 5 is another control schematic of a refrigerating system of the refrigerator of fig. 1.
Referring to fig. 4, the refrigeration system of the present embodiment is substantially the same as the refrigeration system of fig. 2, except that the connection structure between the first control valve 81, i.e., the first branch 91 and the second branch 92, and the freezing evaporator 6 is different. The refrigeration system of this embodiment adopts the second control valve 82 and the third control valve 83, and the two control valves respectively control the on-off of the first branch 91 and the second branch 92, so as to realize the selective switching between the first branch 91 and the second branch 92.
In this embodiment, the second control valve 82 is disposed on the first branch 91, and the second control valve 82 may be a switching valve to directly control the opening or closing of the first branch 91. The third control valve 83 is disposed on the second branch 92, and the third control valve 83 may be a switch valve to directly control the opening or closing of the second branch 92. And further, the second control valve 82 and the third control valve 83 cooperate to control the selective switching between the first branch 91 and the second branch 92.
Based on the refrigerator and the refrigerating system structure in the refrigerator, the refrigerating system provided by the invention has a first refrigerating mode and a second refrigerating mode.
Referring to fig. 2, in the first cooling mode, the first branch 91 is opened and the second branch 92 is closed. The refrigerant flowing out of the compressor 2 sequentially passes through the condenser 3, the drying filter 4, the throttle 5, the freezing evaporator 6, the first control valve 81, the first cooling section 71 and the second cooling section 72, and finally returns to the compressor 2 to form a first cooling loop. The first refrigeration loop utilizes the first refrigeration section 71 and the second refrigeration section 72 of the refrigeration evaporator 7 to jointly refrigerate the refrigerating chamber, so that the refrigerating efficiency is higher, and the refrigerating chamber is cooled faster.
Referring to fig. 2, in the second cooling mode, the first branch 91 is closed, and the second branch 92 is opened. The refrigerant flowing out of the compressor 2 sequentially passes through the condenser 3, the dry filter 4, the throttle 5, the freezing evaporator 6, the first control valve 81, the second cooling section 72 and finally returns to the compressor 2 to form a second cooling loop. The second refrigeration loop only utilizes the second refrigeration section 72 of the refrigeration evaporator 7 to independently refrigerate the refrigerating chamber, the refrigeration efficiency is lower, and the cooling of the refrigerating chamber is slower than that of the first refrigeration mode.
Referring to fig. 2, based on the refrigerator and the refrigerating system structure therein, the embodiment of the invention further provides a refrigerating control method. The method mainly solves the problem that the starting rate of the compressor 2 is low in a low-temperature environment, namely, when the external environment temperature is low. In the refrigerator of the method, the refrigerating system has the first refrigerating mode and the second refrigerating mode. The method comprises the following steps:
the external ambient temperature of the refrigerator is obtained. Specifically, an ambient temperature sensor provided on the cabinet 1 may be employed to measure the external ambient temperature of the refrigerator.
A first temperature threshold, such as-13 deg.c, is set for the temperature of the environment outside the refrigerator. And comparing the acquired external environment temperature with a set first temperature threshold.
When the external environment temperature is greater than the set first temperature threshold, the external environment temperature is higher. The refrigeration system of the refrigerator performs cooling in the first cooling mode. In the first cooling mode, a refrigerant is allowed to sequentially flow through the first and second cooling sections 71 and 72 such that the first and second cooling sections 71 and 72 collectively provide cooling capacity for the refrigerator compartment.
It should be noted that, in the first refrigeration mode, the refrigerating efficiency of the refrigerating chamber is higher, so that the normal refrigerating requirements of the refrigerating chamber and the freezing chamber with higher ambient temperature can be satisfied.
When the external ambient temperature is less than the set first temperature threshold, it is indicated that the external ambient temperature is lower. The refrigeration system of the refrigerator performs refrigeration in the second refrigeration mode. In the second cooling mode, the refrigerant is caused to flow only through the second cooling section 72 such that the second cooling section 72 alone provides cooling to the fresh food compartment.
It should be noted that, under the second refrigeration mode, the refrigeration efficiency of the cold-storage chamber is relatively low, and the cooling of the cold-storage chamber is relatively slow, so the compressor 2 is controlled to stop in a mode that the temperature of the cold-storage chamber reaches the preset stop temperature, when the refrigeration system stops refrigerating and refrigerating schemes, the starting time of the compressor 2 can be prolonged, the starting rate of the compressor 2 is further improved, the refrigeration requirement of the freezing chamber under the low-temperature environment is met, namely, the temperature requirement corresponding to the freezing chamber under the low-temperature environment is met, and therefore the problem that the starting rate of the compressor 2 is relatively low under the low-temperature environment is solved.
Referring to fig. 2, based on the refrigerator and the refrigerating system structure therein, another refrigerating control method is provided in the embodiment of the present invention. The method aims at the freezing capacity test of the freezing chamber, and solves the problems that the freezing chamber is a coiled tube evaporator, the heat load heats the refrigerant in the tube, the starting time of the compressor 2 is long, and the refrigerating temperature is too low. In the refrigerator of the method, the refrigerating system has the first refrigerating mode and the second refrigerating mode. The method comprises the following steps:
temperatures of a freezing chamber and a refrigerating chamber in a refrigerator are respectively obtained. Specifically, a freezing temperature sensor disposed within the freezer compartment may be employed to measure the temperature within the freezer compartment. And a refrigerating temperature sensor arranged in the refrigerating chamber is adopted to measure the temperature in the refrigerating chamber.
A second temperature threshold, such as-7 deg.c, is set for the freezer compartment temperature. While a third temperature threshold, such as 8 deg.c, is set for the temperature of the refrigerated compartment. And comparing the acquired temperature of the freezing chamber with a set second temperature threshold value, and simultaneously comparing the acquired temperature of the refrigerating chamber with a set third temperature threshold value.
When the temperature of the freezing chamber is higher than the second temperature threshold value and the temperature of the refrigerating chamber is lower than the third temperature threshold value, the heat load is placed in the freezing chamber, and the temperature of the refrigerating chamber is reduced. The refrigeration system of the refrigerator performs refrigeration in the second refrigeration mode. In the second cooling mode, the refrigerant is caused to flow only through the second cooling section 72 such that the second cooling section 72 alone provides cooling to the fresh food compartment. Namely, through the second refrigeration mode, the refrigeration efficiency of the refrigerating chamber is reduced, so that the refrigeration requirement of the refrigerating chamber is maintained, and meanwhile, the refrigeration requirement of the freezing chamber can be met, and the refrigeration capacity test is smoothly carried out. In the actual use process, the problem that the temperature of the refrigerating chamber is too low due to the fact that the refrigerating chamber is put into a heat load can be effectively avoided.
When the temperature of the freezing chamber is lower than the second temperature threshold value or the temperature of the refrigerating chamber is higher than the third temperature threshold value, the temperature of the freezing chamber and the refrigerating chamber is normal, and no heat load is placed in the freezing chamber. The refrigeration system of the refrigerator performs cooling in the first cooling mode. In the first cooling mode, the refrigerant can sequentially flow through the first cooling section 71 and the second cooling section 72, so that the first cooling section 71 and the second cooling section 72 provide cold for the refrigerating chamber together, and normal cooling requirements of the freezing chamber and the refrigerating chamber are met.
Referring to fig. 2, based on the refrigerator and the refrigerating system structure therein, another refrigerating control method is provided in the embodiment of the present invention. The method is mainly applied to further prolonging the starting time of the compressor 2 in the second refrigeration mode. In the refrigerator of the method, the refrigerating system has the first refrigerating mode and the second refrigerating mode. The method comprises the following steps:
the first shutdown temperature and the second shutdown temperature corresponding to the compressor 2 are set for the adjustment temperature set by the refrigerator, and the second shutdown temperature is smaller than the first shutdown temperature. The temperature control is a temperature control set for the refrigerator when the refrigerator is used by a user. The adjusting temperature can have a plurality of gears, and for each gear, the starting temperature and the stopping temperature corresponding to the compressor 2 are set, so that the starting time of the compressor 2 is controlled.
And acquiring the set regulating temperature of the refrigerator. The temperature setting adjustment of the refrigerator may be obtained by detecting a gear of the temperature setting selected by the user.
And judging the refrigeration mode of the refrigeration system. It should be noted that, the refrigeration system may be determined to be in the first refrigeration mode or in the second refrigeration mode by detecting the on/off condition of the first branch 91 and the second branch 92.
When the refrigeration system is operating in the first refrigeration mode, the shutdown temperature of the compressor 2 adopts the first shutdown temperature. When the start-up temperatures of the compressors 2 are the same, the shutdown temperatures of the compressors 2 are high, and the start-up time of the compressors 2 is short.
When the refrigeration system is operating in the second refrigeration mode, the shutdown temperature of the compressor 2 adopts the second shutdown temperature. Because the second stop temperature is lower than the first stop temperature, the starting time of the compressor 2 is longer under the condition that the starting temperature of the compressor 2 is the same, and then the starting time of the compressor 2 in the second refrigeration mode can be prolonged.
The first and second shutdown temperatures of the first and second cooling modes may be referred to the following table.
Table one, in the first cooling mode, the on/off of the compressor 2 is as follows:
table two, in the second cooling mode, the on/off of the compressor 2 is as follows:
referring to tables one and two, in the first refrigeration mode and the second refrigeration mode, the compressor 2 adopts the same start-up temperature and adopts different stop temperatures. The shutdown temperature of the compressor 2 in the second refrigeration mode is lower than the shutdown temperature in the first refrigeration mode, i.e. the second shutdown temperature is lower than the first shutdown temperature. Therefore, the on-time of the compressor 2 in the second cooling mode is longer than that in the first cooling mode.
Based on the technical scheme, the embodiment of the invention has at least the following advantages and positive effects:
in the refrigerator according to the embodiment of the invention, the structure of the first refrigerating section 71 and the second refrigerating section 72 of the refrigerating evaporator 7 is utilized to cooperate with the compressor 2, the condenser 3, the refrigerating evaporator 6 and the control valve, so that the refrigerating system has two different refrigerating loops, and a first refrigerating mode and a second refrigerating mode are correspondingly formed.
In the first cooling mode, the refrigerant can flow through the first cooling section 71 and the second cooling section 72 of the refrigeration evaporator 7 in sequence, and the first cooling section 71 and the second cooling section 72 are utilized for cooling together; meanwhile, in the second refrigeration mode, the refrigerant only flows through the second refrigeration section 72 of the refrigeration evaporator 7, only the second refrigeration section 72 is used for refrigerating independently, and the refrigeration efficiency of the refrigeration chamber is reduced, so that the refrigeration efficiency of the refrigeration evaporator 7 is selectively controlled, the refrigeration efficiency of the refrigeration chamber is reduced in a low-temperature environment, the starting rate of the compressor 2 is improved, and the problem of low starting rate in the low-temperature environment is effectively solved. And meanwhile, when the freezing capacity test is carried out or the heat load is added into the freezing chamber, the second refrigeration mode can be adopted, so that the refrigeration of the refrigerating chamber and the freezing chamber is effectively maintained, the freezing capacity test is carried out smoothly, and the temperature of the refrigerating chamber is effectively prevented from being too low.
Compared with the existing solution of heating by a heating wire to raise the refrigerating temperature, the scheme does not need to additionally increase power consumption, can more scientifically and reasonably utilize energy, and ensures that the refrigeration of the refrigerator is safer and more environment-friendly.
While the invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (5)
1. A refrigeration control method of a refrigerator, the refrigerator comprising:
the refrigerator comprises a refrigerator body, wherein a first liner and a second liner which are separated are arranged in the refrigerator body; a freezing chamber is formed in the first inner container, and a refrigerating chamber is formed in the second inner container; a refrigeration system configured to have a first refrigeration mode and a second refrigeration mode, the refrigeration system comprising:
a compressor;
the inlet of the condenser is connected with the air outlet of the compressor;
the freezing evaporator is wound on the outer peripheral wall of the first liner and used for providing cold energy for the freezing chamber, and an inlet of the freezing evaporator is connected with an outlet of the condenser;
the refrigerating evaporator is attached to the outer wall of the second liner and used for providing cold energy for the refrigerating chamber, the refrigerating evaporator comprises a first refrigerating section and a second refrigerating section connected in series to the downstream of the first refrigerating section, and the downstream of the second refrigerating section is connected with an air return port of the compressor; a kind of electronic device with high-pressure air-conditioning system
The control valve is arranged between the freezing evaporator and the refrigerating evaporator; the control valve is connected with the outlet of the freezing evaporator and is respectively connected with the upstream of the first refrigerating section and the upstream of the second refrigerating section; the control valve is used for controlling a pipeline in the refrigeration evaporator so that the refrigerant flowing out of the refrigeration evaporator can sequentially flow through the first refrigeration section and the second refrigeration section in the first refrigeration mode and can only flow through the second refrigeration section in the second refrigeration mode;
the refrigeration control method comprises the following steps:
respectively acquiring temperatures of a freezing chamber and a refrigerating chamber in the refrigerator;
comparing the acquired temperature of the freezing chamber with a set second temperature threshold value, and comparing the acquired temperature of the refrigerating chamber with a set third temperature threshold value;
when the temperature of the freezing chamber is higher than a second temperature threshold value and the temperature of the refrigerating chamber is lower than a third temperature threshold value, the refrigerating system adopts a second refrigerating mode, so that the refrigerant only flows through the second refrigerating section, and the second refrigerating section independently provides cold for the refrigerating chamber;
when the temperature of the freezing chamber is lower than the second temperature threshold value or the temperature of the refrigerating chamber is higher than the third temperature threshold value, the refrigerating system adopts a first refrigerating mode, so that the refrigerant can sequentially flow through the first refrigerating section and the second refrigerating section, and the first refrigerating section and the second refrigerating section can jointly provide cold energy for the refrigerating chamber.
2. The refrigerating control method of a refrigerator as claimed in claim 1, wherein the control valve has a first inlet, a first outlet, and a second outlet; the first inlet is connected with an outlet of the freezing evaporator, the first outlet is connected with an upstream end of the first refrigerating section, and the second outlet is connected with a joint between the first refrigerating section and the second refrigerating section;
wherein in the first cooling mode, the first outlet is open and the second outlet is closed; in the second cooling mode, the first outlet is closed and the second outlet is opened.
3. The refrigerating control method of a refrigerator as claimed in claim 1, wherein the control valve includes a first control valve and a second control valve;
a first branch is arranged between the outlet of the freezing evaporator and the first refrigerating section, and the first control valve is arranged on the first branch;
a second branch is arranged between the outlet of the freezing evaporator and the second refrigerating section, and the second control valve is arranged on the second branch;
wherein in the first cooling mode, the first control valve opens the first branch and the second control valve closes the second branch;
in the second cooling mode, the first control valve closes the first branch, and the second control valve opens the second branch.
4. The refrigeration control method of a refrigerator as claimed in claim 1, wherein the refrigeration system further comprises a tee pipe provided at a junction between the first refrigeration section and the second refrigeration section;
the tee pipe is provided with a first port, a second port and a third port; the first port is connected with the control valve, the second port is connected with the downstream of the first refrigeration section, and the third port is connected with the upstream of the second refrigeration section.
5. The refrigerating control method of a refrigerator as claimed in claim 1, comprising the steps of:
setting a first shutdown temperature and a second shutdown temperature corresponding to the compressor aiming at the set regulation temperature of the refrigerator, wherein the second shutdown temperature is smaller than the first shutdown temperature;
acquiring a set regulating temperature of the refrigerator;
judging a refrigeration mode of the refrigeration system;
when the refrigeration system operates in the first refrigeration mode, the shutdown temperature of the compressor adopts the first shutdown temperature;
the shutdown temperature of the compressor adopts a second shutdown temperature when the refrigeration system is operating in the second refrigeration mode.
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| CN103134227A (en) * | 2013-02-26 | 2013-06-05 | 合肥美的荣事达电冰箱有限公司 | Refrigeration circulating system and single-system direct air-cooling refrigerator with same |
| CN204128236U (en) * | 2014-08-04 | 2015-01-28 | 王建 | Refrigerator and the adjustable refrigerator refrigeration system of refrigeration evaporator area |
| CN105783384A (en) * | 2014-12-25 | 2016-07-20 | 青岛海尔股份有限公司 | Refrigerator and operation control method of refrigerator |
| CN112050505A (en) * | 2020-09-11 | 2020-12-08 | 长虹美菱股份有限公司 | Double-circulation refrigerator refrigerating system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103134227A (en) * | 2013-02-26 | 2013-06-05 | 合肥美的荣事达电冰箱有限公司 | Refrigeration circulating system and single-system direct air-cooling refrigerator with same |
| CN204128236U (en) * | 2014-08-04 | 2015-01-28 | 王建 | Refrigerator and the adjustable refrigerator refrigeration system of refrigeration evaporator area |
| CN105783384A (en) * | 2014-12-25 | 2016-07-20 | 青岛海尔股份有限公司 | Refrigerator and operation control method of refrigerator |
| CN112050505A (en) * | 2020-09-11 | 2020-12-08 | 长虹美菱股份有限公司 | Double-circulation refrigerator refrigerating system and control method thereof |
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Address after: 266000 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant after: Hisense refrigerator Co.,Ltd. Address before: 266000 No.399, Songling Road, Laoshan District, Qingdao City, Shandong Province Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. |
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