CN107084577B - Control method and control device of dual-system refrigerator and refrigerator - Google Patents
Control method and control device of dual-system refrigerator and refrigerator Download PDFInfo
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- CN107084577B CN107084577B CN201710503175.8A CN201710503175A CN107084577B CN 107084577 B CN107084577 B CN 107084577B CN 201710503175 A CN201710503175 A CN 201710503175A CN 107084577 B CN107084577 B CN 107084577B
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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
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
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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
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
- F25D2700/122—Sensors measuring the inside temperature of freezer compartments
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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
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- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The embodiment of the invention provides a control method and a control device of a dual-system refrigerator and the refrigerator, relates to the technical field of refrigeration of the refrigerator, and can improve the temperature control precision of the refrigerator, so that the energy consumption is reduced, and the temperature stability of a room is improved. The control method of the dual system refrigerator comprises the following steps: detecting the current compartment temperature of each compartment of the refrigerator in a compressor shutdown state; and when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding pre-starting temperature, controlling to start the compressor, and refrigerating the compartment corresponding to the first evaporator on the current default communicated refrigerating circuit, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment.
Description
Technical Field
The invention relates to the field of refrigeration of refrigerators, in particular to a control method and a control device of a dual-system refrigerator and a refrigerator.
Background
At present, a dual-system refrigerator usually includes a compressor, and the compressor is connected to a refrigerating circuit and a freezing circuit through a condenser, of course, evaporators are respectively disposed on the refrigerating circuit and the refrigerating circuit, and for an air-cooled refrigerator, the evaporators need corresponding fans to provide cooling capacity to corresponding compartments through air ducts. In the refrigeration mode, the compressor is switched to be communicated with the refrigeration loop, and the refrigeration compartment is refrigerated through an evaporator corresponding to the refrigeration compartment on the refrigeration loop; in the same way, in the freezing and refrigerating mode, the compressor is switched to be communicated with the freezing loop, and the freezing chamber is refrigerated through the evaporator corresponding to the freezing chamber on the freezing loop. The switching between the two modes is usually based on the measured temperature of each compartment, for example, when the measured temperature of the refrigerating compartment meets the starting temperature of the refrigerating compartment, the mode is switched to the refrigerating mode, and when the measured temperature of the refrigerating compartment meets the stopping temperature of the refrigerating compartment, the compressor is closed; and when the measured temperature of the freezing chamber meets the starting temperature of the freezing chamber, switching to a freezing and refrigerating mode, and when the measured temperature of the freezing chamber meets the shutdown temperature of the freezing chamber, closing the compressor.
However, there may be a case where the freezing compartment and the refrigerating compartment have both cooling demands or the time interval between the freezing compartment and the refrigerating compartment starting to have the cooling demands is short, i.e.: the measured temperatures of the cold storage chamber and the freezing chamber simultaneously meet respective starting temperatures, or the measured temperature of the freezing chamber in a short time interval after the measured temperature of the cold storage chamber meets the starting temperature of the cold storage chamber also meets the starting temperature, the short time interval is not enough for the cold storage chamber to refrigerate to meet the shutdown temperature of the cold storage chamber, or the measured temperature of the freezing chamber in a short time after the measured temperature of the freezing chamber meets the starting temperature of the cold storage chamber, and the short time interval is not enough for the freezing chamber to refrigerate to meet the shutdown temperature of the freezing chamber; the design of the prior art does not consider the situation, if the refrigerator is continuously controlled according to the prior art, when the first compartment is refrigerated, the measured temperature of the other second compartment reaching the starting temperature can be continuously increased due to the fact that the second compartment cannot be refrigerated in time, and for the variable frequency compressor, if the temperature of the compartment is increased too high, the compressor needs to be increased in frequency to generate enough cold energy when the second compartment is refrigerated, so that the second compartment can reach the shutdown temperature quickly. Since the second compartment is sufficiently short to cool, the first compartment may warm up during the time but may not yet reach the start-up temperature, thus temporarily causing the compressor to shut down. Then the two compartments are heated simultaneously to meet the requirement of refrigeration, the cycle is carried out, the frequency of the compressor is frequently increased and reduced, and one compartment in the two compartments can not be refrigerated in time when the temperature of the compressor reaches the starting temperature, so that the temperature control precision is reduced, the energy consumption is improved, and the temperature stability of the compartments is not facilitated.
Disclosure of Invention
The embodiment of the invention provides a control method and a control device of a dual-system refrigerator and the refrigerator, which can improve the temperature control precision of the refrigerator, thereby reducing energy consumption and improving the room temperature stability.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, there is provided a control method of a dual system refrigerator, including:
detecting the current compartment temperature of each compartment of the refrigerator in a compressor shutdown state;
and when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding pre-starting temperature, controlling to start the compressor, and refrigerating the compartment corresponding to the first evaporator on the current default communicated refrigerating circuit, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment.
In a second aspect, there is provided a control apparatus of a dual system refrigerator, including:
the detection unit is used for detecting the current compartment temperature of each compartment of the refrigerator in the shutdown state of the compressor;
and the control unit is used for controlling the compressor to be started to refrigerate the compartment corresponding to the first evaporator on the refrigeration loop which is communicated by default at present when the detection unit determines that the current compartment temperature of each compartment is greater than or equal to the corresponding pre-starting temperature, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment.
In the scheme, the control device of the dual-system refrigerator detects the current compartment temperature of each compartment of the refrigerator in the shutdown state of the compressor; and when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding pre-starting temperature, controlling to start the compressor, and refrigerating the compartment corresponding to the first evaporator on the currently default communicated refrigerating circuit, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment. That is, in the scheme, the compressor is started with reference to the pre-starting temperature of each compartment, as long as the current compartment temperatures of all compartments are greater than or equal to the respective pre-starting temperatures, the compressor is started to refrigerate the compartments corresponding to the first evaporators on the refrigeration circuits which are communicated by default at present, the refrigeration circuits which are communicated by default at present are refrigeration circuits, the temperature of the freezing compartments can be reduced due to refrigeration, the temperature of the refrigerating compartments can be continuously increased, when the temperature of the refrigerating compartments is increased to meet the starting temperature of the refrigerating compartments, the compressor is switched to refrigerate the refrigerating compartments according to the prior art, the temperature of the freezing compartments is reduced due to the fact that the refrigeration of the freezing compartments is performed in advance, and therefore in the refrigerating process of the refrigerating compartments, the freezing compartments cannot be rapidly heated to the starting temperature with the refrigeration requirement, and therefore, during the shutdown period of the compressor, the starting temperatures of the freezing compartments and the refrigerating compartments with the refrigeration requirement are simultaneously reached, or the other one of the freezing chamber and the refrigerating chamber reaches the starting temperature with the refrigeration requirement in a short time after the other one of the freezing chamber and the refrigerating chamber starts to refrigerate, so that frequent frequency increase and frequency reduction of the compressor are avoided, the two chambers can be guaranteed to refrigerate in time when the starting temperature of the two chambers is reached as far as possible, the temperature control precision of the refrigerator is improved, and the energy consumption is reduced, and the temperature stability of the chambers is improved.
In a third aspect, a control method of a dual-system refrigerator is provided, the dual-system refrigerator comprises a refrigerating chamber and a freezing chamber, wherein the output end of a compressor of the refrigerator is connected to a refrigerating circuit and a freezing circuit through an electromagnetic valve, the refrigerating circuit is connected with a refrigerating evaporator of the refrigerating chamber and a freezing evaporator of the freezing chamber in series, and the freezing circuit is connected with a freezing evaporator of the freezing chamber in series; the control method comprises the following steps:
detecting the current compartment temperature of each compartment of the refrigerator in a compressor shutdown state;
when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding starting temperature, controlling the electromagnetic valve to switch the circuit communicated with the compressor to the refrigeration circuit;
and controlling to start the compressor, and controlling to start the fan corresponding to the refrigeration evaporator and the fan corresponding to the freezing evaporator.
In a fourth aspect, a control device for a dual-system refrigerator is provided, which is applied to a dual-system refrigerator, the dual-system refrigerator includes a refrigerating chamber and a freezing chamber, wherein an output end of a compressor of the refrigerator is connected to a refrigerating circuit and a freezing circuit through an electromagnetic valve, wherein the refrigerating circuit is connected in series with a refrigerating evaporator of the refrigerating chamber and a freezing evaporator of the freezing chamber, and the freezing circuit is connected in series with a freezing evaporator of the freezing chamber; the control device includes:
the detection unit is used for detecting the current compartment temperature of each compartment of the refrigerator in the shutdown state of the compressor;
the control unit is used for controlling the electromagnetic valve to switch the loop communicated with the compressor to the refrigeration loop when the detection unit determines that the current compartment temperature of each compartment is greater than or equal to the corresponding starting temperature; and controlling to start the compressor, and controlling to start the fan corresponding to the refrigeration evaporator and the fan corresponding to the freezing evaporator.
In the scheme, the control device of the dual-system refrigerator detects the current compartment temperature of each compartment of the refrigerator in the shutdown state of the compressor; when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding starting temperature, the electromagnetic valve is controlled to switch the refrigeration loop communicated with the compressor to the refrigeration loop; and controlling to start the compressor, and controlling to start the fan corresponding to the refrigeration evaporator and the fan corresponding to the freezing evaporator. Namely, in the scheme, the compressor is started by referring to the current compartment temperature of each compartment, and as long as the current compartment temperatures of all the compartments are greater than or equal to the respective corresponding starting temperatures, the electromagnetic valve is controlled to switch the refrigeration loop communicated with the compressor to the refrigeration loop; the method comprises the steps of controlling to start a compressor, and controlling to start a fan corresponding to a refrigeration evaporator and a fan corresponding to a freezing evaporator, so that a refrigeration chamber and a freezing chamber start to refrigerate simultaneously, the temperature of the refrigeration chamber can be gradually reduced to the shutdown temperature of the refrigeration chamber, the temperature of the freezing chamber can be reduced or maintained, and the temperature of the freezing chamber cannot be increased to the startup temperature of the freezing chamber during the refrigeration period of the refrigeration chamber, therefore, when the current chamber temperature of all the chambers is greater than or equal to the corresponding startup temperature, one chamber starts to refrigerate and reduce the temperature, and the temperature of the other chamber continues to be increased, so that frequent frequency increase and frequency reduction of the compressor are avoided, two chambers can be guaranteed to refrigerate in time when reaching the startup temperature, the temperature control precision of the refrigerator is improved, and the stability of the temperature of the chambers is improved due to energy consumption.
In a fifth aspect, there is provided a dual system refrigerator comprising the control device of the dual system refrigerator of the second or fourth aspect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-system refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a dual system refrigerator according to another embodiment of the present invention;
fig. 3 is a schematic structural view of a dual system refrigerator according to yet another embodiment of the present invention;
FIG. 4 is a graph illustrating a temperature profile of a compartment of a dual system refrigerator according to an embodiment of the present invention and an output power of a compressor;
fig. 5 is a schematic control flow diagram of a dual-system refrigerator according to an embodiment of the present invention;
FIG. 6 is a graph illustrating a temperature profile of a compartment of a dual system refrigerator according to another embodiment of the present invention and an output power of a compressor;
FIG. 7 is a graph illustrating a temperature profile of a compartment of a dual system refrigerator according to another embodiment of the present invention and an output power of a compressor;
FIG. 8 is a schematic control flow chart of a dual system refrigerator according to another embodiment of the present invention;
fig. 9 is a schematic control flow diagram of a dual system refrigerator according to yet another embodiment of the present invention;
fig. 10 is a schematic structural view of a control apparatus of a dual system refrigerator according to an embodiment of the present invention;
fig. 11 is a schematic structural view of a control apparatus of a dual system refrigerator according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
It should be noted that, in the embodiments of the present invention, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that, when the difference is not emphasized, the intended meaning is consistent.
The control method of the dual-system refrigerator provided by the embodiment of the invention is applied to the dual-system refrigerator which can be divided into an evaporator parallel connection mode and an evaporator series-parallel connection mode based on the connection mode classification of the evaporators. In which, referring to fig. 1, there is provided a dual system refrigerator in the form of parallel connected evaporators, wherein the dual system refrigerator includes a compressor 1, a condenser 2, a solenoid valve 3, wherein an outlet of the compressor 1 is connected to an input end 3 of the solenoid valve through the condenser 2, and two output ends of the solenoid valve 3 are connected to an input end of the compressor 1 through a refrigerating circuit and a freezing circuit, respectively. Wherein the refrigerating loop is connected with a first capillary tube and a refrigerating evaporator 4 in series, the freezing loop is connected with a second capillary tube and a freezing evaporator 5 in series, and the double-system refrigerator also comprises a refrigerating fan 6 corresponding to the refrigerating evaporator 4 and a freezing fan 7 corresponding to the freezing evaporator 5; the two evaporators correspond to two compartments of the refrigerator respectively, and the refrigerating evaporator corresponds to a refrigerating compartment; the freezing evaporator corresponds to the freezing chamber. The two evaporators are connected in parallel, and the refrigerant can only pass through a single evaporator, namely, the two evaporators cannot be simultaneously refrigerated.
Referring to fig. 2, there is provided a dual system refrigerator in which evaporators are connected in series and parallel, wherein the dual system refrigerator includes a compressor 1, a condenser 2, a solenoid valve 3 (the solenoid valve may be a solenoid valve), wherein an outlet of the compressor 1 is connected to an input end 3 of the solenoid valve through the condenser 2, and two output ends of the solenoid valve 3 are connected to the input end of the compressor 1 through a refrigerating circuit and a freezing circuit, respectively. Wherein the refrigerating loop is connected with a first capillary tube, a refrigerating evaporator 4 and a freezing evaporator 5 in series, the freezing loop is connected with a second capillary tube and a freezing evaporator 5 in series, and the double-system refrigerator also comprises a refrigerating fan 6 corresponding to the refrigerating evaporator 4 and a freezing fan 7 corresponding to the freezing evaporator 5; the two evaporators correspond to two compartments of the refrigerator respectively, and the refrigerating evaporator corresponds to a refrigerating compartment; the freezing evaporator corresponds to the freezing chamber. The two evaporators are in different connection states on different loops, and a refrigerant on the refrigerating loop can pass through the refrigerating evaporator 4 and a refrigerant on the freezing loop 5 can pass through the freezing evaporator 5.
Loops through which the refrigerants in the two double-system refrigerators pass are switched by an electromagnetic valve according to a pulse signal input by a control device shown in fig. 3, the control device can be a functional entity in the double-system refrigerator, and the control device is connected with a temperature sensor of a refrigerating chamber, a temperature sensor of a freezing chamber, a refrigerating fan, a freezing fan, the electromagnetic valve and a compressor; the control device can collect the temperature of the refrigerating chamber through the temperature sensor of the refrigerating chamber, control the electromagnetic valve to switch the output loop of the refrigerant according to the collected temperature, control the starting and stopping of the compressor to control the output of the refrigerant, and for the air-cooled dual-system refrigerator, the control device conveys the cold quantity of the evaporator to the storage chamber through controlling the operation of the fan, so that the purpose of refrigerating the storage chamber is achieved.
In the parallel connection mode of the evaporators shown in fig. 1, the refrigeration chamber refrigeration and the freezing chamber refrigeration are independent, and the refrigeration loop refrigerates in the refrigeration mode, and the freezing loop cannot refrigerate; in the freezing mode, the freezing circuit refrigerates, and the refrigerating circuit can not refrigerate. When there is the refrigeration demand in cold-stored room, the cold-stored mode of operation, the compressor operation, cold volume are carried to cold-stored evaporimeter, through the operation of cold-stored fan, transmit cold volume to cold-stored room. When the freezing chamber has a refrigeration demand, the freezing mode is operated, the compressor is operated, the cold energy is transmitted to the freezing evaporator, and the freezing chamber is refrigerated through the operation of the freezing fan. And independently refrigerating the refrigerating chamber and the freezing chamber. When the refrigeration of the cold storage chamber is finished and the refrigeration chamber has a refrigeration demand, the electromagnetic valve is switched to the refrigeration loop, and the refrigeration fan is started to refrigerate the refrigeration chamber; when the refrigeration of the freezing chamber is finished and the refrigerating chamber has a refrigeration demand, the electromagnetic valve is switched to the refrigerating loop to open the refrigerating fan, so that the refrigerating chamber is refrigerated. As shown in fig. 2, the evaporators are connected in series and parallel, the refrigerating evaporator and the freezing evaporator are connected in series and parallel, and the freezing evaporator also participates in refrigeration when the refrigerating compartment refrigerates. When the freezing chamber is refrigerated, the refrigeration evaporator is not refrigerated. Through the on-off control of the fans, independent refrigeration of each chamber can be realized in a series-parallel connection mode, only the refrigerating fan is started during the operation of a refrigerating mode, and only the freezing fan is started during the operation of a freezing mode. When there is the refrigeration demand in cold-stored room, the cold-stored mode of operation, the compressor operation, cold volume are carried to cold-stored evaporimeter and freezing evaporimeter, through the operation of cold-stored fan, transmit cold volume to cold-stored room. When the freezing chamber has a refrigeration demand, the freezing mode is operated, the compressor is operated, the cold energy is transmitted to the freezing evaporator, and the freezing chamber is refrigerated through the operation of the freezing fan. When only refrigeration needs exist in refrigeration, the refrigeration evaporator participates in refrigeration, but the refrigeration fan is not started, and independent refrigeration of the cold storage chamber and the refrigeration chamber is realized. When the refrigeration of the cold storage chamber is finished and the refrigeration chamber has a refrigeration demand, the electromagnetic valve is switched to the refrigeration loop, and the refrigeration fan is started to refrigerate the refrigeration chamber; when the refrigeration of the freezing chamber is finished and the refrigerating chamber has a refrigeration demand, the electromagnetic valve is switched to the refrigerating loop to open the refrigerating fan, so that the refrigerating chamber is refrigerated.
Because the refrigeration of each compartment is independently controlled, each compartment can more easily reach the preset temperature requirement, and the refrigeration efficiency is improved. From the analysis of system design, each chamber of the double-system is independently refrigerated, the design freedom degree of evaporators of each chamber and a refrigeration air channel is greatly increased, the refrigeration system is not required to be designed strictly according to the matching of chamber loads, the air channels are reduced in the independent air supply of the chambers, the air mixing and odor mixing of each chamber are avoided, and the air supply efficiency and the refrigeration quality of the refrigerator are improved. In the aspect of defrosting, cold storage and freezing are separated, so that moisture in a refrigerating chamber is prevented from being brought into a freezing evaporator, the freezing and defrosting interval is prolonged, and the power consumption is saved. However, the independent cooling of each compartment also causes the mutual interference of the cooling of each compartment.
According to the control method of the existing double-system electronic air-cooling refrigerator, each compartment controls the refrigeration of the compartment according to the starting and stopping temperature of the compartment under the set gear (as shown in figure 4, a curve of the compartment temperature and a curve of the output power of a compressor under an ideal state). When the compartment temperature T (Tr refrigerating compartment temperature, Tf freezing compartment temperature) of any compartment is equal to or greater than the start-up temperature Tk (Trk refrigerating compartment start-up temperature, Tfk freezing compartment start-up temperature), the solenoid valve is switched to the circuit where the evaporator corresponding to the compartment is located, the compressor is turned on, and the compartment is refrigerated, and when the compartment temperature T is equal to or less than the stop temperature Tt (Trt refrigerating compartment stop temperature, Tft freezing compartment stop temperature), the circuit is switched to another compartment for refrigeration (the condition for switching to another compartment for refrigeration is the same as the above description and is not repeated here) or the compressor is stopped, wherein in fig. 4, the compressor is stopped at δ T and at other times, the control flow is shown in fig. 5 according to the above principle, i ═ r, j ═ f, or i ═ f, j ═ r in fig. 5, wherein i ═ r is the refrigerating circuit, j when j equals f, the j loop is a freezing loop; when i is f, the i circuit is a freezing circuit, and when j is r, the j circuit is a refrigerating circuit. Under the condition of independent refrigeration control of each compartment, if the cold storage compartment and the freezing compartment have refrigeration requirements at the same time or have refrigeration requirements in a short time in succession due to the influence of defrosting or external heat source introduction, the refrigeration of the two compartments is difficult to meet at the same time. When the temperatures of the two compartments almost reach the corresponding starting temperatures at the same time, after the refrigeration of any one compartment is cooled for a period of time, the temperature of the other compartment tends to rise higher, as shown in fig. 6, at the time t1(t4), the refrigeration compartment and the freezing compartment almost reach the corresponding starting temperatures at the same time, the refrigeration compartment starts to refrigerate at t1, the temperature of the freezing compartment continues to rise, and the refrigeration result of the refrigeration compartment at the time t2(t5) is that the temperature of the freezing compartment exceeds the corresponding Tfk. For the inverter compressor, the temperature of the freezing compartment is increased too high, the frequency of the compressor is increased at t2, a large amount of cold energy is input after the frequency of the compressor is increased, the compartment reaches the shutdown temperature quickly, and no refrigeration demand exists in the other compartment immediately after the refrigeration is finished, so that the compressor is stopped at t3(t 6). After the refrigeration is stopped for a long time, the refrigerating chamber and the freezing chamber have refrigeration demands at the same time, and this is repeated (for example, times t4, t5, and t6, which are repeated at times corresponding to the aforementioned times t1, t2, and t3, and are not described again). The compressor frequently increases and decreases the frequency, and the temperature of each compartment is always separated from the set starting and stopping temperature, so that the temperature control precision is greatly weakened, and the power consumption is greatly increased.
In order to solve the above problems, the present application provides a control method of a dual system refrigerator, including the steps of:
s101, detecting the current compartment temperature of each compartment of the refrigerator in a compressor stop state.
S102, when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding pre-starting temperature, controlling to start the compressor, and refrigerating the compartment corresponding to the first evaporator on the refrigeration loop which is communicated with the compartment in a current default mode, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment.
In step S102, refrigerating a compartment corresponding to a first evaporator on a refrigeration circuit that is currently in default communication includes: and opening the fan of the compartment corresponding to the first evaporator.
In step S102, for the dual-system refrigerator shown in fig. 1, if the default connected refrigeration circuit is a refrigeration circuit, the refrigerator is in a refrigeration mode, and a refrigeration fan is turned on to deliver the cooling capacity of the refrigeration evaporator to the refrigeration compartment to refrigerate the refrigeration compartment; if the default communicated refrigerating loop is a refrigerating loop, the refrigerator is in a refrigerating mode, and a refrigerating fan is started to convey the cold quantity of the refrigerating evaporator for the refrigerating chamber to refrigerate the refrigerating chamber. For the dual-system refrigerator shown in fig. 2, if the default communicated refrigeration loop is a freezing loop, the refrigerator is in a freezing mode, a freezing fan is started to convey the cold energy of a freezing evaporator to the freezing chamber, and the freezing chamber is refrigerated; if the default communicated refrigerating loop is a refrigerating loop, the refrigerator is in a refrigerating mode, a refrigerant flows through the freezing evaporator and the refrigerating evaporator at the same time, and at the moment, only the refrigerating fan is started to convey the cold energy of the refrigerating evaporator for the refrigerating chamber to refrigerate the refrigerating chamber. For any compartment, the pre-starting temperature Ty is Tk-C, Tk is the starting temperature of the compartment, and particularly for the cold storage compartment, the pre-starting temperature Try is Trk-C1; for the freezing compartment, the pre-starting temperature Tfy ═ Tfk-C2, C1 and C2 may be the same value or different values, the size of the pre-starting temperature Tfy may be related to the difference between the start-stop temperatures of the respective compartments and the cooling speed of the system, the difference between the start-stop temperatures is large, and when the cooling speed is slow, the values of C1 and C2 should be large. Of course, the specific numerical value can also be determined according to the actual operation test result, so that the purposes of quickly stabilizing the refrigeration system and reducing the interference on the original refrigeration control as much as possible are achieved. As shown in FIG. 7, at the time of t7, the pre-starting temperature of the Tr refrigerating chamber temperature is larger than or equal to the pre-starting temperature of the Trk-C1 refrigerating chamber, and the pre-starting temperature of the Tf freezing chamber temperature is larger than or equal to the pre-starting temperature of the Tfk-C2 freezing chamber, the compressor is controlled to be started to carry out refrigeration through the evaporator on the freezing circuit.
After the step S102, the method further includes a step S103, after the compressor cools the compartment corresponding to the first evaporator for a period of time, and when it is determined that the current compartment temperature of any compartment corresponding to the second evaporator is greater than or equal to the starting temperature corresponding to the compartment, the refrigeration circuit is controlled to be switched to the circuit corresponding to the second evaporator, so as to cool the compartment corresponding to the second evaporator.
That is, as shown in fig. 7, at time t8 after S102, the temperature of the refrigerating compartment reaches Tr ≧ Trk-C1, the refrigeration circuit through which the compressor is controlled to communicate is switched to the refrigeration circuit for refrigerating the refrigerating compartment, the compressor is controlled to be turned on to output the refrigerant to the evaporator of the refrigerating compartment, and the refrigeration fan corresponding to the evaporator of the refrigerating compartment is controlled to be turned on when the refrigerator is in the refrigerating mode.
In the scheme, the control device of the dual-system refrigerator detects the current compartment temperature of each compartment of the refrigerator in the shutdown state of the compressor; and when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding pre-starting temperature, controlling to start the compressor, and refrigerating the compartment corresponding to the first evaporator on the currently default communicated refrigerating circuit, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment. That is, in the scheme, the compressor is started with reference to the pre-starting temperature of each compartment, as long as the current compartment temperatures of all compartments are greater than or equal to the respective pre-starting temperatures, the compressor is started to refrigerate the compartments corresponding to the first evaporators on the refrigeration circuits which are communicated by default at present, the refrigeration circuits which are communicated by default at present are refrigeration circuits, the temperature of the freezing compartments can be reduced due to refrigeration, the temperature of the refrigerating compartments can be continuously increased, when the temperature of the refrigerating compartments is increased to meet the starting temperature of the refrigerating compartments, the compressor is switched to refrigerate the refrigerating compartments according to the prior art, the temperature of the freezing compartments is reduced due to the fact that the refrigeration of the freezing compartments is performed in advance, and therefore in the refrigerating process of the refrigerating compartments, the freezing compartments cannot be rapidly heated to the starting temperature with the refrigeration requirement, and therefore, during the shutdown period of the compressor, the starting temperatures of the freezing compartments and the refrigerating compartments with the refrigeration requirement are simultaneously reached, or the other one of the freezing chamber and the refrigerating chamber reaches the starting temperature with the refrigeration requirement in a short time after the other one of the freezing chamber and the refrigerating chamber starts to refrigerate, so that frequent frequency increase and frequency reduction of the compressor are avoided, the two chambers can be guaranteed to refrigerate in time when the starting temperature of the two chambers is reached as far as possible, the temperature control precision of the refrigerator is improved, and the energy consumption is reduced, and the temperature stability of the chambers is improved.
Specifically, taking the dual-system refrigerator shown in fig. 1 as an example, the present application provides a control method for a dual-system refrigerator shown in fig. 8 and 9, including the following steps:
s201, detecting the current compartment temperature of each compartment of the refrigerator in a compressor stop state.
S202, determining that Tr is larger than or equal to Trk-C1, executing a step S203, and otherwise, keeping the compressor stopped.
S203, determining Tf to be more than or equal to Tfk-C2, executing S204, and otherwise, keeping the compressor stopped.
Wherein step S202 and step 203 can be reversed by first determining whether Tf ≧ Tfk-C2 is satisfied and then determining whether Tr ≧ Trk-C1 is satisfied.
And S204, controlling to start the compressor, and refrigerating the compartment corresponding to the first evaporator on the refrigeration loop which is communicated by default at present, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment.
If the refrigeration loop communicated by default with the current compressor is a refrigeration loop, as shown in fig. 8, the compressor is controlled to be started, and a refrigeration fan is started to refrigerate the refrigeration compartment until Trt is less than or equal to Trt, and the compressor is controlled to stop.
And then when the freezing chamber Tf is determined to be larger than or equal to Tfk, the electromagnetic valve is controlled to switch a refrigeration loop communicated with the compressor to the freezing loop, the compressor is controlled to be started, the freezing fan is started to refrigerate the freezing chamber until Tf is smaller than or equal to Tft, and the compressor is controlled to stop.
Of course, if the refrigeration loop communicated by default with the current compressor is a refrigeration loop, as shown in fig. 9, the compressor is controlled to be started, and the refrigeration fan is started to refrigerate the refrigeration chamber until Tf is less than or equal to Tft, and the compressor is controlled to stop.
And then when the cold storage chamber Tr is determined to be larger than or equal to Trk, the electromagnetic valve is controlled to switch a refrigeration loop communicated with the compressor to the cold storage loop, the compressor is controlled to be started, the cold storage fan is started to refrigerate the cold storage chamber until Trt is smaller than or equal to Trt, and the compressor is controlled to stop.
In addition, since the operation mechanisms of the dual-system refrigerator shown in fig. 2 are similar to those of the dual-system refrigerator shown in fig. 1, and are respectively controlled by refrigerating the freezing chamber and the refrigerating chamber independently, the control principles are similar to those of fig. 8 and 9 and are not repeated here.
Specifically, taking the dual-system refrigerator shown in fig. 2 as an example, the present application provides a control method for a dual-system refrigerator, which includes the following steps:
s301, detecting the current compartment temperature of each compartment of the refrigerator in the stop state of the compressor.
And S302, when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding starting temperature, controlling the electromagnetic valve to switch the refrigeration loop communicated with the compressor to a refrigeration loop.
In a specific step 203, for the refrigerating chamber and the freezing chamber, when Tr is larger than or equal to Trk and Tf is larger than or equal to Tfk, a refrigerating circuit communicated with the compressor is switched to the refrigerating circuit.
And S303, controlling to start the compressor, and controlling to start the fan corresponding to the refrigeration evaporator and the fan corresponding to the freezing evaporator.
In addition, the method also comprises a step S304 of controlling the electromagnetic valve to switch the refrigeration loop communicated with the compressor to the refrigeration loop refrigerated by any one compartment when the current compartment temperature of any one compartment is determined to be greater than or equal to the starting temperature corresponding to any one compartment; and controlling to start the compressor, and controlling to start the fan corresponding to the evaporator of any compartment according to the refrigeration mode of the current refrigerator. For example: if the current compartment temperature of the cold storage compartment is greater than or equal to the starting temperature corresponding to the cold storage compartment, controlling the electromagnetic valve to switch a refrigeration loop communicated with the compressor to the cold storage loop; controlling to start the compressor and controlling to start a fan corresponding to an evaporator of the refrigerating chamber; if the current compartment temperature of the freezing compartment is greater than or equal to the starting temperature corresponding to the freezing compartment, controlling the electromagnetic valve to switch a refrigeration loop communicated with the compressor to the freezing loop; and controlling to start the compressor and controlling to start the fan corresponding to the evaporator of the freezing chamber. The specific operation of step 304 is similar to the above scheme and is not described herein again.
In the scheme, the control device of the dual-system refrigerator detects the current compartment temperature of each compartment of the refrigerator in the shutdown state of the compressor; when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding starting temperature, the electromagnetic valve is controlled to switch the refrigeration loop communicated with the compressor to the refrigeration loop; and controlling to start the compressor, and controlling to start the fan corresponding to the refrigeration evaporator and the fan corresponding to the freezing evaporator. Namely, in the scheme, the compressor is started by referring to the current compartment temperature of each compartment, and as long as the current compartment temperatures of all the compartments are greater than or equal to the respective corresponding starting temperatures, the electromagnetic valve is controlled to switch the refrigeration loop communicated with the compressor to the refrigeration loop; the method comprises the steps of controlling to start a compressor, and controlling to start a fan corresponding to a refrigeration evaporator and a fan corresponding to a freezing evaporator, so that a refrigeration chamber and a freezing chamber start to refrigerate simultaneously, the temperature of the refrigeration chamber can be gradually reduced to the shutdown temperature of the refrigeration chamber, the temperature of the freezing chamber can be reduced or maintained, and the temperature of the freezing chamber cannot be increased to the startup temperature of the freezing chamber during the refrigeration period of the refrigeration chamber, therefore, when the current chamber temperature of all the chambers is greater than or equal to the corresponding startup temperature, one chamber starts to refrigerate and reduce the temperature, and the temperature of the other chamber continues to be increased, so that frequent frequency increase and frequency reduction of the compressor are avoided, two chambers can be guaranteed to refrigerate in time when reaching the startup temperature, the temperature control precision of the refrigerator is improved, and the stability of the temperature of the chambers is improved due to energy consumption.
Referring to fig. 10, an embodiment of the present application provides a control apparatus of a dual system refrigerator, including:
a detection unit 101 for detecting a current compartment temperature of each compartment of the refrigerator in a compressor shutdown state;
and the control unit 102 is configured to control to start the compressor and refrigerate the compartment corresponding to the first evaporator on the refrigeration circuit which is currently communicated by default when the detection unit determines that the current compartment temperature of each compartment is greater than or equal to the corresponding pre-start temperature, where the pre-start temperature of the compartment is less than the start-up temperature of the compartment.
In addition, the control unit 102 is specifically configured to turn on a blower of the compartment corresponding to the first evaporator, so as to implement cooling of the compartment corresponding to the first evaporator on the current default connected cooling circuit.
The control unit 102 is further configured to, after the compressor cools the compartment corresponding to the first evaporator for a period of time, control the refrigeration circuit to switch to the circuit corresponding to the second evaporator to cool the compartment corresponding to the second evaporator when the detection unit 101 determines that the current compartment temperature of any compartment corresponding to the second evaporator is greater than or equal to the starting temperature corresponding to the compartment. The control unit 102 is specifically configured to turn on a fan of the compartment corresponding to the second evaporator, so as to control the refrigeration circuit to be switched to the circuit corresponding to the second evaporator, and refrigerate the compartment corresponding to the second evaporator.
The functions and technical effects that can be achieved by the control device of the dual-system refrigerator provided in fig. 10 are the same as those of S101 to S103 in the above embodiment of the method, and reference may be made to the above detailed discussion, which is not repeated here.
Referring to fig. 11, an embodiment of the present application provides a control apparatus for a dual-system refrigerator, which is applied to a dual-system refrigerator including a refrigerating chamber and a freezing chamber, wherein an output end of a compressor of the refrigerator is connected to a refrigerating circuit and a freezing circuit through an electromagnetic valve, wherein the refrigerating circuit is connected in series with a refrigerating evaporator of the refrigerating chamber and a freezing evaporator of the freezing chamber, and the freezing circuit is connected in series with a freezing evaporator of the freezing chamber; the control device includes:
a detection unit 111 for detecting a current compartment temperature of each compartment of the refrigerator in a compressor shutdown state;
the control unit 112 is used for controlling the electromagnetic valve to switch a refrigeration circuit communicated with the compressor to the refrigeration circuit when the detection unit determines that the current compartment temperature of each compartment is greater than or equal to the corresponding starting temperature; and controlling to start the compressor, and controlling to start the fan corresponding to the refrigeration evaporator and the fan corresponding to the freezing evaporator.
The functions and technical effects that can be achieved by the control device of the dual-system refrigerator provided in fig. 11 are the same as those of S301 to S304 in the above method embodiment, and reference may be made to the above detailed discussion, which is not repeated herein.
It should be noted that, in a specific implementation process, each step executed by the control device in the above method flow may be implemented by a processor in a hardware form executing a computer execution instruction in a software form stored in a memory, and details are not described here to avoid repetition. The program corresponding to the action executed by the control device of the dual-system refrigerator can be stored in the memory of the washing machine in a software form, so that the processor can call and execute the operation corresponding to each module.
The memory above may include volatile memory (volatile memory), such as random-access memory (RAM); a non-volatile memory (non-volatile memory) such as a read-only memory (ROM), a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); combinations of the above categories of memory may also be included.
The processor in the above-provided apparatus may be a single processor or may be a collective term for a plurality of processing elements. For example, the processor may be a central processing unit (CPU; other general purpose processors, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A control method of a dual system refrigerator, comprising:
detecting the current compartment temperature of each compartment of the refrigerator in a compressor shutdown state;
when the current compartment temperature of each compartment is determined to be greater than or equal to the corresponding pre-starting temperature, controlling to start a compressor, refrigerating the compartment corresponding to a first evaporator on a refrigerating circuit which is communicated by default at present, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment, and when the compartment corresponding to the first evaporator reaches the stopping temperature, controlling the compressor to stop;
and after the compressor refrigerates the compartment corresponding to the first evaporator for a period of time, when the current compartment temperature of any compartment corresponding to the second evaporator is determined to be greater than or equal to the starting temperature corresponding to the compartment, controlling a refrigeration loop to be switched to a loop corresponding to the second evaporator, and refrigerating the compartment corresponding to the second evaporator.
2. The method of claim 1, wherein the refrigerating the compartment corresponding to the first evaporator on the refrigeration circuit that is currently in default communication comprises: and opening a fan of the compartment corresponding to the first evaporator.
3. The method of claim 1, wherein the controlling the refrigeration circuit to switch to the circuit corresponding to the second evaporator, and wherein the refrigerating the compartment corresponding to the second evaporator comprises: and opening a fan of the compartment corresponding to the second evaporator.
4. A control apparatus of a dual system refrigerator, comprising:
the detection unit is used for detecting the current compartment temperature of each compartment of the refrigerator in the shutdown state of the compressor;
the control unit is used for controlling the compressor to be started and refrigerating the compartment corresponding to the first evaporator on the refrigerating circuit which is communicated by default at present when the detection unit determines that the current compartment temperature of each compartment is greater than or equal to the pre-starting temperature corresponding to each compartment, wherein the pre-starting temperature of the compartment is less than the starting temperature of the compartment, and the compressor is controlled to stop when the compartment corresponding to the first evaporator reaches the stopping temperature;
the control unit is further configured to control the refrigeration circuit to switch to the circuit corresponding to the second evaporator to refrigerate the compartment corresponding to the second evaporator when the detection unit determines that the current compartment temperature of any compartment corresponding to the second evaporator is greater than or equal to the starting temperature corresponding to the compartment after the compressor refrigerates the compartment corresponding to the first evaporator for a period of time.
5. The control device according to claim 4, characterized in that the control unit is in particular adapted to turning on a fan of a compartment corresponding to the first evaporator.
6. The control device according to claim 4,
the control unit is specifically configured to turn on a blower of a compartment corresponding to the second evaporator.
7. A refrigerator comprising the control device of the dual system refrigerator according to any one of claims 4 to 6.
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| CN107830685B (en) * | 2017-12-07 | 2020-07-03 | 合肥华凌股份有限公司 | Multi-system refrigerator fan energy-saving control method, controller, readable medium and refrigerator |
| CN108759247A (en) * | 2018-07-20 | 2018-11-06 | 海信（山东）冰箱有限公司 | A kind of dual system wind cooling refrigerator and its refrigeration control method with deep cooling function |
| CN110953784B (en) * | 2018-09-26 | 2022-04-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor control method and device and readable storage medium |
| CN110671865A (en) * | 2019-10-12 | 2020-01-10 | 珠海格力电器股份有限公司 | Parallel double-circulation refrigerator and control method thereof |
| CN111578603A (en) * | 2020-05-20 | 2020-08-25 | 长虹美菱股份有限公司 | Defrosting control method |
| CN112484390B (en) * | 2020-11-26 | 2022-03-25 | 珠海格力电器股份有限公司 | Refrigerator temperature control method and device and refrigerator |
| CN113154789B (en) * | 2021-02-03 | 2022-10-04 | 合肥朗驰工业设计有限公司 | Control method and system for parallel double-system refrigerator |
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