CN116147280A - Refrigerator control method and refrigerator - Google Patents
Refrigerator control method and refrigerator Download PDFInfo
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- CN116147280A CN116147280A CN202310252651.9A CN202310252651A CN116147280A CN 116147280 A CN116147280 A CN 116147280A CN 202310252651 A CN202310252651 A CN 202310252651A CN 116147280 A CN116147280 A CN 116147280A
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- 239000007788 liquid Substances 0.000 claims description 114
- 238000004891 communication Methods 0.000 claims description 35
- 238000005057 refrigeration Methods 0.000 abstract description 38
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 16
- 239000003507 refrigerant Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000010836 blood and blood product Substances 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety 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
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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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
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Abstract
The invention relates to the technical field of storage equipment, in particular to a control method of a refrigerator and the refrigerator, and aims to solve the problems that the existing refrigerator generally adopts a single-stage compression refrigeration mode, the temperature fluctuation in the refrigerator is caused by the start and stop of a compressor and the change of load, and the constant temperature environment is difficult to maintain. For this purpose, the refrigerator of the present invention comprises a refrigerator body, a fan, a compressor, a condenser, a first throttling device, a second throttling device, a first evaporator, a second evaporator, a first electromagnetic valve and a second electromagnetic valve, wherein the two electromagnetic valves are controlled to enable the two evaporators to alternately operate, and the two evaporators can be switched between a series mode and a parallel mode, and the control method comprises: and acquiring the actual temperature and the target set temperature in the refrigerating cavity, and selectively executing corresponding working modes according to the actual temperature and the target set temperature of the refrigerating cavity. By such arrangement, not only can the refrigerator be continuously cooled, but also the cooling strength can be adjusted according to the load change in the refrigerator.
Description
Technical Field
The invention relates to the technical field of storage equipment, and particularly provides a control method of a refrigerator and the refrigerator.
Background
In recent years, with the development of the fields of biology and medicine, medical refrigeration equipment is widely used for storing medical products such as medicines, vaccines and blood products, the temperature in the box is required to be maintained between 2 ℃ and 8 ℃, meanwhile, the humidity in the box is required not to be excessively high so as not to wet a medicine box, and the uniformity and fluctuation degree of the temperature in the box are also required to be very high, and in order to maintain the temperature performance in the box, a common plate of the medical refrigeration equipment adopts an air cooling refrigeration mode and is provided with an overhead fin evaporator, a fan and a fan cover.
However, the existing refrigerator generally adopts a single-stage compression refrigeration mode, and the temperature fluctuation in the refrigerator body is caused by the start and stop of a compressor and the change of load, so that the constant-temperature environment is difficult to maintain.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the technical problems that the existing refrigerator adopts a single-stage compression refrigeration mode generally, the start and stop of a compressor and the change of load can cause the fluctuation of the temperature in the refrigerator, and the constant temperature environment is difficult to maintain.
In a first aspect, the present invention provides a control method of a refrigerator, where the refrigerator includes a refrigerator body, a compressor, a condenser, a first throttling device, a second throttling device, a first evaporator, a second evaporator, a first electromagnetic valve, a second electromagnetic valve, and a fan, the interior of the refrigerator body includes a refrigerating cavity, a wind cavity, and a wind channel, the wind channel communicates the refrigerating cavity with the wind cavity, the first evaporator, the second evaporator, and the fan are all installed in the wind cavity, the first electromagnetic valve has a first liquid inlet and two first liquid outlets, the first liquid inlet can communicate with only one first liquid outlet at the same time, the second electromagnetic valve has a second liquid inlet and two second liquid outlets, the second liquid inlet can communicate with only one second liquid outlet at the same time, the air outlet of the compressor communicates with a first end of the condenser, the second end of the condenser communicates with the first liquid inlet and two first liquid outlets, the first evaporator and the first liquid inlet communicate with the first evaporator and the second liquid outlet, and the first evaporator and the second evaporator communicate with the first liquid inlet and the second evaporator respectively, and the first evaporator and the second evaporator control method includes: acquiring the actual temperature of the refrigerating cavity; acquiring a target set temperature of the refrigerating cavity; selectively executing a first operation mode or a second operation mode according to the actual temperature of the refrigerating chamber and the target set temperature; wherein the first evaporator and the second evaporator are operated in series when the first mode of operation is performed; the first and second evaporators are operated in parallel and alternately while the second mode of operation is being performed.
In a preferred embodiment of the above control method for a refrigerator, the specific steps of selectively executing the first operation mode or the second operation mode according to the actual temperature and the target set temperature of the refrigerator cavity include: calculating a difference between the actual temperature of the refrigerating cavity and the target set temperature, and recording the difference as a first difference; comparing the first difference value with a first preset value; and selectively executing the first working mode or the second working mode according to the comparison result.
In a preferred embodiment of the above control method for a refrigerator, the specific steps of selectively executing the first operation mode or the second operation mode according to the comparison result include: and if the first difference value is larger than the first preset value, executing the first working mode.
In a preferred embodiment of the above control method for a refrigerator, the specific steps of selectively executing the first operation mode or the second operation mode according to the comparison result include: and if the first difference value is not larger than the first preset value, executing the second working mode.
In the preferred technical scheme of the control method of the refrigerator, the refrigerator further comprises a third electromagnetic valve, the third electromagnetic valve is provided with a third liquid inlet and two third liquid outlets, the third liquid inlet can be communicated with one third liquid outlet at the same time, the third liquid inlet is communicated with the second end of the second evaporator, the two third liquid outlets are respectively communicated with the liquid inlet of the compressor and the first end of the first evaporator, the air cavity comprises a first air cavity and a second air cavity, the first air cavity is located above the refrigerator cavity, the second air cavity is located below the refrigerator cavity, the first air blower and the second air blower are both installed in the first air cavity, the second air blower and the second air blower are both installed in the second air cavity, the two ends of the air channel are respectively communicated with the first air cavity, the second air inlet, the first air inlet, the second air outlet, the first air inlet, the second air inlet and the second air outlet are respectively communicated with the first air cavity, the second air inlet and the second air inlet, and the second air outlet are also arranged, and the first air inlet and the second air outlet are respectively, and the first air inlet and the second air outlet are connected with the air channel can be respectively, and the first air inlet and the second air outlet and the second air chamber are also connected with the air inlet and the second air inlet and the air channel.
In a preferred embodiment of the above control method for a refrigerator, in a case where the first operation mode is performed, the control method further includes: acquiring the upper temperature of the refrigerating cavity and the lower temperature of the refrigerating cavity; the communication sequence of the first evaporator and the second evaporator is selectively exchanged according to the upper temperature and the lower temperature of the refrigerating chamber.
In a preferred embodiment of the above control method for a refrigerator, the specific step of selectively exchanging the communication sequence of the first evaporator and the second evaporator according to the upper temperature and the lower temperature of the refrigerating chamber includes: calculating the difference between the upper temperature and the lower temperature of the refrigerating cavity and recording the difference as a second difference; comparing the second difference value with a second preset value; and selectively exchanging the communication sequence of the first evaporator and the second evaporator according to the comparison result.
In a preferred embodiment of the above control method for a refrigerator, the specific step of selectively exchanging the communication sequence of the first evaporator and the second evaporator according to the comparison result includes: and if the second difference value is not greater than the second preset value, maintaining the current communication sequence of the first evaporator and the second evaporator.
In a preferred embodiment of the above control method for a refrigerator, the specific step of selectively exchanging the communication sequence of the first evaporator and the second evaporator according to the comparison result includes: and if the second difference value is larger than the second preset value, exchanging the communication sequence of the first evaporator and the second evaporator.
In a second aspect, the invention also provides a refrigerator comprising a controller configured to perform the control method described above.
Under the condition that the technical scheme is adopted, the refrigerator comprises a refrigerator body, a compressor, a condenser, a first throttling device, a second throttling device, a first evaporator, a second evaporator, a first electromagnetic valve, a second electromagnetic valve and a fan, wherein the refrigerator body comprises a refrigerating cavity, an air cavity and an air duct, the air duct is used for communicating the refrigerating cavity with the air cavity, the first evaporator, the second evaporator and the fan are all arranged in the air cavity, the first electromagnetic valve is provided with a first liquid inlet and two first liquid outlets, the first liquid inlet can be communicated with one first liquid outlet at the same time, the second electromagnetic valve is provided with a second liquid inlet and two second liquid outlets, the second liquid inlet can be communicated with one second liquid outlet at the same time, the air outlet of the compressor is communicated with the first end of the condenser, the second end of the condenser is communicated with the first liquid inlet, the two first liquid outlets are respectively communicated with the first ends of the first evaporator and the second evaporator, the second ends of the first evaporator and the second evaporator are respectively communicated with the second liquid inlet of the second evaporator and the second compressor, and the second liquid outlet of the second evaporator and the second evaporator are respectively communicated with the first liquid inlet of the second evaporator. Through the arrangement, the first evaporator and the second evaporator are enabled to run in parallel, and the characteristic that the liquid inlet of the first electromagnetic valve can only be communicated with one liquid outlet simultaneously is utilized, so that the alternating running of the first evaporator and the second evaporator is realized, the fact that the refrigerator is always provided with one evaporator in a running state is ensured, the refrigerating cavity is continuously refrigerated, and the constant temperature and humidity in the refrigerator body are maintained; meanwhile, the on-off of the two liquid outlets of the second electromagnetic valve is controlled to realize the switching between the serial connection mode and the parallel connection mode of the first evaporator and the second evaporator, so that the refrigerating strength is adjusted according to the change of the load in the box.
Further, the control method of the refrigerator of the present invention includes: acquiring the actual temperature of the refrigerating cavity; acquiring a target set temperature of the refrigerating cavity; selectively executing a first working mode or a second working mode according to the actual temperature of the refrigerating cavity and the target set temperature; wherein the first evaporator and the second evaporator are operated in series when the first mode of operation is performed; the first evaporator and the second evaporator are operated in parallel and alternately while the second operation mode is performed. Through such setting, set for the condition for the switching of fridge between first mode and second mode, realized the automatic switch-over of fridge between two modes, not only can adapt to different load and operating mode in the box, improved the intelligent level of fridge moreover, and then promoted user's use experience.
Still further, the control method of the refrigerator of the present invention further includes: calculating the difference between the actual temperature of the refrigerating cavity and the target set temperature, and recording the difference as a first difference; comparing the first difference value with a first preset value; and selectively executing the first working mode or the second working mode according to the comparison result. Through such setting, utilize the difference between the actual temperature of cold-stored chamber and the target to set for the temperature and carry out the comparison with first default, can more accurately and directly reflect the operating condition and the load condition that the fridge was located this moment to the controller can more accurately and rapidly adjust refrigeration intensity, and then adapts to the change in the cold-stored chamber.
Still further, the control method of the refrigerator of the present invention further includes: and if the first difference value is larger than a first preset value, executing the first working mode. Through such setting for first evaporimeter and second evaporimeter establish ties, realize the two and move simultaneously, thereby increase the refrigeration intensity of fridge, with the temperature in making the fridge reduces fast, guarantees the refrigeration effect of fridge.
Still further, the control method of the refrigerator of the present invention further includes: and if the first difference value is not greater than the first preset value, executing the second working mode. Through the arrangement, the first evaporator and the second evaporator are connected in parallel, so that the two evaporators can alternately operate, the fluctuation of the temperature in the refrigerating cavity is reduced, and meanwhile, the proper refrigerating strength is matched for small load, so that energy is saved.
Still further, the refrigerator of the invention further comprises a third electromagnetic valve, the third electromagnetic valve is provided with a third liquid inlet and two third liquid outlets, the third liquid inlet can be communicated with one third liquid outlet at the same time, the third liquid inlet is communicated with the second end of the second evaporator, the two third liquid outlets are respectively communicated with the liquid inlet of the compressor and the first end of the first evaporator, the air cavity comprises a first air cavity and a second air cavity, the first air cavity is positioned above the refrigerator cavity, the second air cavity is positioned below the refrigerator cavity, the fan comprises a first fan and a second fan, the first evaporator and the first fan are both arranged in the first air cavity, the second evaporator and the second fan are both arranged in the second air cavity, the two ends of the air channel are respectively communicated with the first air cavity and the second air cavity, the air channel is provided with a first air outlet and a second air outlet which are respectively communicated with the refrigerator cavity, the refrigerator further comprises a first air door, a second air door and a third air door, the first air door is positioned at the position of the first air cavity and the second air door, the first air door is positioned between the first air door and the second air outlet, and the first air door is positioned between the first air door and the second air channel and the second air outlet. By such arrangement, on the one hand, the communication order of the first evaporator and the second evaporator in the series operation mode can be exchanged by the cooperation of the first solenoid valve, the second solenoid valve and the third solenoid valve; on the other hand, when making the fridge run in parallel with two evaporators, the air conditioning that first wind chamber or second wind chamber produced can all send into the fridge chamber from first air outlet and second air outlet, improved the air-out efficiency and the refrigeration effect in wind channel, when two evaporators run in parallel, the air conditioning that first wind chamber produced gets into the fridge chamber through first air outlet, the air conditioning that the second wind chamber produced gets into the fridge chamber through the second air outlet, realized the subregion air supply to the fridge chamber, accurate refrigeration, make the fridge chamber can match suitable refrigeration strength according to the size of each regional internal load.
Still further, in the case of executing the first operation mode, the control method of the refrigerator of the present invention further includes: acquiring the upper temperature of the refrigerating cavity and the lower temperature of the refrigerating cavity; the communication sequence of the first evaporator and the second evaporator is selectively exchanged according to the upper temperature and the lower temperature of the refrigerating chamber. Through such setting for the fridge can be according to the change condition of the load in the different regions of box in the regional refrigeration intensity of adjustment, realizes accurate accuse temperature.
Still further, the control method of the refrigerator of the present invention further includes: calculating the difference between the upper temperature and the lower temperature of the refrigerating cavity, and recording the difference as a second difference; comparing the second difference value with a second preset value; the communication order of the first evaporator and the second evaporator is selectively exchanged according to the comparison result. Through the arrangement, the load change conditions of different areas in the refrigerating cavity can be reflected in real time, so that the refrigerating intensity of each area can be timely adjusted according to the load change conditions, and the temperature control of the refrigerating box is accurate and rapid.
Still further, the control method of the refrigerator of the present invention further includes: if the second difference is not greater than the second preset value, the current communication sequence of the first evaporator and the second evaporator is maintained. By the arrangement, when the load condition of each area in the refrigerating cavity does not change greatly, the higher refrigerating intensity is continuously implemented for the area with larger load, and the lower refrigerating intensity is implemented for the area with smaller load.
Still further, the control method of the refrigerator of the present invention further includes: and if the second difference value is larger than a second preset value, exchanging the communication sequence of the first evaporator and the second evaporator. Through such setting for after the load condition of two regions in the cold-stored intracavity takes place to exchange, can realize the regulation of the interior refrigeration intensity of two regions through the intercommunication order of change first evaporimeter and second evaporimeter, reach the effect of accurate accuse temperature.
In addition, the refrigerator further provided by the invention based on the technical scheme adopts the control method, so that the technical effect of the control method is further achieved.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a refrigerator according to the present invention;
FIG. 2 is a schematic diagram of a refrigerator according to the present invention;
FIG. 3 is a cross-sectional view at A-A in FIG. 2;
FIG. 4 is a schematic diagram of the operation of the refrigeration cycle system of the present invention;
FIG. 5 is a flow chart of a control method of the present invention;
fig. 6 is a flow chart of an embodiment of the control method of the present invention.
List of reference numerals:
11. a compressor; 12. a condenser; 13. a first electromagnetic valve; 14. a second electromagnetic valve; 15. a third electromagnetic valve; 16. a first throttle device; 17. a second throttle device; 18. a first evaporator; 19. a second evaporator; 21. a first air chamber; 22. a second air chamber; 23. a refrigeration cavity; 24. an air duct; 241. a first damper; 242. a second damper; 243. a third damper; 244. a first air outlet; 245. and a second air outlet.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "inner", "outer", "upper", "lower", "top", "bottom", and the like, which indicate a direction or a positional relationship, are based on the direction or the positional relationship shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
The existing refrigerator based on the background technology generally adopts a single-stage compression refrigeration mode, and the starting and stopping of a compressor and the change of load can cause the fluctuation of the temperature in the refrigerator, so that the technical problem of difficulty in keeping a constant temperature environment is solved. The invention provides a control method of a refrigerator, which aims to ensure that two evaporators can alternately operate and can be switched between a series mode and a parallel mode through the cooperation of a first electromagnetic valve and a second electromagnetic valve by arranging a fan, a compressor, a condenser, a first throttling device, a second throttling device, a first evaporator, a second evaporator, a first electromagnetic valve and a second electromagnetic valve in the refrigerator, and selectively executing the parallel or series working mode of the two evaporators according to the actual temperature and the target set temperature of a refrigerating cavity by acquiring the actual temperature and the target set temperature of the refrigerating cavity. Through the arrangement, the continuous refrigeration of the refrigerator is realized, and the temperature in the refrigerator is reduced to be greatly fluctuated; the accurate control of the temperature in the box is also realized, so that the temperature in the box can be adjusted in real time to adapt to the change of the load.
Specifically, as shown in fig. 1 to 4, the refrigerator of the present invention includes a casing, a compressor 11, a condenser 12, a first throttling device 16, a second throttling device 17, a first evaporator 18, a second evaporator 19, a first solenoid valve 13, a second solenoid valve 14 and a fan (not shown in the drawings), wherein the inside of the casing includes a refrigerating cavity 23, a wind cavity and a wind channel 24, the wind channel 24 communicates the refrigerating cavity 23 and the wind cavity, the first evaporator 18, the second evaporator 19 and the fan are all installed in the wind cavity, the first solenoid valve 13 has a first liquid inlet and two first liquid outlets, the first liquid inlet can be simultaneously communicated with only one first liquid outlet, the second solenoid valve 14 has a second liquid inlet and two second liquid outlets, the second liquid inlet can be simultaneously communicated with only one second liquid outlet, the air outlet of the compressor 11 is communicated with the first end of the condenser 12, the second end of the condenser 12 is communicated with the first liquid inlet, the two first liquid outlets are respectively communicated with the first evaporator 18 and the second evaporator 19 and the first liquid outlet of the second evaporator 18 and the two second liquid outlets are respectively communicated with the first evaporator 18 and the second liquid outlet of the first evaporator 11 and the second evaporator 11.
The refrigeration cycle pipeline is divided into two parts by the one-inlet two-outlet electromagnetic valve, one part of the refrigeration cycle pipeline is communicated with the first evaporator 18, the other part of the refrigeration cycle pipeline is communicated with the second evaporator 19, so that a refrigeration cycle structure in which the first evaporator 18 and the second evaporator 19 are in parallel operation is formed, when the compressor 11 works, under the action of the compressor 11, the refrigerant turns into high-temperature and high-pressure gas into the condenser 12, the low-temperature and high-pressure gas is changed into low-temperature and high-pressure gas after being fully radiated in the condenser 12 and enters the first electromagnetic valve 13 through the first liquid inlet, and because the first liquid inlet of the first electromagnetic valve 13 can only be communicated with one of the first liquid outlets at the same time, namely, the first liquid inlet is communicated with one of the first liquid outlets, the other first liquid outlet is closed, so that only one of the evaporators in the cycle pipeline is communicated, and the refrigerant can flow into the compressor 11 finally, and the alternate operation of the first evaporator 18 and the second evaporator 19 is realized by controlling the on-off of the two first liquid outlets on the first electromagnetic valve 13.
In addition, a second electromagnetic valve 14 is further installed between the first evaporator 18 and the second evaporator 19, a second liquid inlet of the second electromagnetic valve 14 is communicated with a second end of the first evaporator 18, two second liquid outlets are respectively communicated with a first end of the second evaporator 19 and a gas return port of the compressor 11, and the first evaporator 18 and the second evaporator 19 can be connected in series through the second electromagnetic valve 14, so that simultaneous operation of the two evaporators is realized.
Specifically, when the second inlet of the second solenoid valve 14 is controlled to the return air inlet of the compressor 11, and the first end of the second inlet to the second evaporator 19 is disconnected, the first evaporator 18 and the second evaporator 19 are in a parallel state, and the alternating operation of the first evaporator 18 and the second evaporator 19 is realized by controlling the on-off of the two first liquid outlets of the first solenoid valve 13.
When the second inlet of the second solenoid valve 14 is controlled to be disconnected from the air return of the compressor 11 and the second inlet is connected to the first end of the second evaporator 19, the first evaporator 18 and the second evaporator 19 are in a series connection state, and the refrigerant passes through the first evaporator 18 and then through the second evaporator 19, and finally flows back into the compressor 11.
Since a large amount of heat energy is absorbed during the process of passing through the first evaporator 18, the temperature is greatly increased, so that the absorbed heat value is far smaller than the heat value absorbed before during the process of passing through the second evaporator 19, and the refrigerating effect of the evaporator through which the refrigerant passes first is higher than that of the evaporator through which the refrigerant passes second.
Therefore, by utilizing the principle, the two evaporators can be arranged in different areas of the refrigerator, so that different temperatures in the two areas are realized to adapt to different loads in the two areas, the control precision of the temperature and the refrigerating effect are improved, and the energy is effectively saved.
It should be noted that, in practical applications, a person skilled in the art may flexibly set the number of evaporators according to needs, so as to achieve accurate refrigeration in multiple areas in the refrigeration cavity 23, and such flexible adjustment and modification should be limited within the scope and spirit of the present invention.
Through the arrangement, the first evaporator 18 and the second evaporator 19 are enabled to run in parallel, and the characteristic that the liquid inlet of the first electromagnetic valve 13 can only be communicated with one liquid outlet simultaneously is utilized, so that the alternating running of the first evaporator 18 and the second evaporator 19 is realized, and the fact that one evaporator is always in a running state in the refrigerator is ensured, so that the refrigerating cavity 23 is continuously refrigerated, and the constant temperature and humidity in the refrigerator are maintained; simultaneously, the on-off of the two second liquid outlets on the second electromagnetic valve 14 is controlled to realize the switching between the serial connection mode and the parallel connection mode of the first evaporator 18 and the second evaporator 19 so as to adjust the refrigeration intensity according to the change of the load in the box.
Preferably, as shown in fig. 5, after receiving the control command, the control method of the refrigerator of the present invention comprises the steps of:
s100: acquiring the actual temperature of the refrigerating cavity;
S200: acquiring a target set temperature of the refrigerating cavity;
s300: the first operation mode or the second operation mode is selectively performed according to an actual temperature of the refrigerating chamber and a target set temperature.
Wherein, when executing the first mode of operation, the first evaporator 18 and the second evaporator 19 are operated in series; in performing the second mode of operation, the first evaporator 18 and the second evaporator 19 are operated in parallel and alternately.
Illustratively, a temperature sensor (not shown in the figure) is installed at the return air inlet of the air chamber, and the temperature sensor acquires the actual temperature in the refrigerating chamber 23 by detecting the temperature at the return air inlet, so that the accuracy of temperature detection in the refrigerating chamber can be ensured, and the occupation of the inner space of the refrigerating chamber is avoided.
The target set temperature is the target temperature in the refrigerating cavity 23 set by the user, and the control logic of the control method selects to execute the first working mode or the second working mode according to the relation between the actual temperature in the refrigerating cavity 23 and the target set temperature.
Through such setting, set for the fridge and set for the trigger condition between first mode and second mode, realized the fridge and switched automatically between two modes, not only can adapt to different load and operating mode in the box, improved the intelligent level of fridge moreover, and then promoted user's use experience.
It should be noted that, in practical applications, those skilled in the art may flexibly set various correlations between the actual temperature of the refrigerating chamber and the target set temperature as the switching conditions of the two operation modes, such as the difference, the ratio, etc., and such flexible adjustment and modification do not deviate from the principle and scope of the present invention, and should be limited in the protection scope of the present invention.
Preferably, as shown in fig. 6, the specific steps of selectively executing the first operation mode or the second operation mode according to the actual temperature and the target set temperature in the wind chamber include:
s310, calculating a difference value between the actual temperature of the refrigerating cavity and the target set temperature, and recording the difference value as a first difference value;
s320, comparing the first difference value with a first preset value;
and S330, selectively executing the first working mode or the second working mode according to the comparison result.
The first preset value is the maximum allowable temperature difference between the actual temperature in the refrigerating cavity 23 and the target set temperature, and when the first difference value does not exceed the first preset value, the refrigerating strength of the refrigerating box is matched with the refrigerating load, and the operation condition is stable; when the first difference exceeds the first preset value, the refrigeration load in the refrigerator is larger than the refrigeration intensity, and the refrigeration intensity needs to be improved to match the increased refrigeration load.
Therefore, by comparing the difference between the actual temperature in the refrigerating chamber 23 and the target set temperature with the first preset value, the running condition and the load condition of the refrigerator at the moment can be reflected more accurately and directly, so that the controller can adjust the refrigerating strength more accurately and rapidly, and further adapt to the change in the refrigerating chamber 23.
Preferably, as shown in fig. 6, the specific steps of "selectively executing the first operation mode or the second operation mode according to the comparison result" include:
s331, if the first difference value is larger than a first preset value, executing a first working mode.
Specifically, when the first difference is greater than a first preset value, the refrigerator executes a first working mode, namely, controls a first liquid inlet of the first electromagnetic valve 13 to be connected to a first end passage of the first evaporator 18 and controls a first liquid inlet to be disconnected to a first end of the second evaporator 19; and the first end passageway from the second liquid inlet of the second electromagnetic valve 14 to the second evaporator 19 and the second liquid inlet to the compressor 11 are disconnected, at this time, the first evaporator 18 and the second evaporator 19 are operated in series, and the first evaporator 18 and the second evaporator 19 are both involved in refrigeration, so as to increase the refrigeration intensity of the refrigerator, so that the actual temperature in the refrigeration cavity 23 is quickly reduced to the target set temperature, and the refrigeration effect of the refrigerator is effectively improved.
Preferably, as shown in fig. 6, the specific steps of "selectively executing the first operation mode or the second operation mode according to the comparison result" include:
and S332, if the first difference value is not larger than the first preset value, executing the second working mode.
Specifically, when the first difference is not greater than the first preset value, the refrigerator selectively executes the second operation mode, that is, controls the second inlet of the second solenoid valve 14 to be connected to the compressor 11 and the second inlet to be connected to the first end of the second evaporator 19 to be disconnected; and, the first liquid inlet of the first solenoid valve 13 is alternately communicated with the two first liquid outlets, thereby realizing an alternate operation mode of the first evaporator 18 and the second evaporator 19.
By the arrangement, the first evaporator 18 and the second evaporator 19 are connected in parallel, so that the two evaporators can alternately operate, the temperature fluctuation in the refrigerating cavity 23 is reduced, the refrigerating intensity of the refrigerating box is reduced, and the energy is saved.
Preferably, as shown in fig. 1 to 4, the refrigerator of the present invention further includes a third electromagnetic valve 15, the third electromagnetic valve 15 has a third liquid inlet and two third liquid outlets, the third liquid inlet can be simultaneously connected with only one third liquid outlet, the third liquid inlet is connected with the second end of the second evaporator 19, the two third liquid outlets are respectively connected with the liquid inlet of the compressor 11 and the first end of the first evaporator 18, the air cavity includes a first air cavity 21 and a second air cavity 22, the first air cavity 21 is located above the refrigerator cavity 23, the second air cavity 21 is located below the refrigerator cavity 23, the fan includes a first fan and a second fan, the first evaporator 18 and the first fan are both installed in the first air cavity 21, the second evaporator 19 and the second fan are both installed in the second air cavity 22, two ends of the air duct 24 are respectively connected with the first air cavity 21 and the second air cavity 22, the first air duct 24 is provided with a first air outlet 241 and a second air outlet 244 which are respectively connected with the upper portion and the lower portion of the refrigerator cavity 23, the second air duct 24 is also connected with the first air inlet and the second air duct 242, the second air outlet 243 is located between the first air cavity 24 and the second air outlet 241, and the refrigerator air cavity 24 is also located between the first air inlet and the second air cavity 24, and the second air outlet 245.
By such an arrangement, on the one hand, the communication order of the first evaporator 18 and the second evaporator 19 in the series operation mode can be exchanged by the cooperation of the second solenoid valve 14 and the third solenoid valve 15; on the other hand, when the two evaporators are in parallel operation, the cold air generated by the first air cavity 21 or the second air cavity 22 can enter the refrigerating cavity 23 from the first air outlet 244 and the second air outlet 245, so that the air outlet efficiency and the refrigerating effect of the air duct 24 are improved, when the two evaporators are in parallel operation, the cold air generated by the first air cavity 21 enters the upper area of the refrigerating cavity 23 through the first air outlet 244, the cold air generated by the second air cavity 22 enters the lower area of the refrigerating cavity 23 through the second air outlet 245, the partition air supply and the accurate refrigerating of the refrigerating cavity 23 are realized, and the flexibility of storing articles is improved.
After the third electromagnetic valve 15 is added, the first operation mode of the refrigerator can be a serial mode that the first evaporator 18 is in front and the second evaporator 19 is in back, and in the serial mode, the refrigerating intensity of the first evaporator 18 is stronger than that of the second evaporator 19; in the series mode, the second evaporator 19 is in front and the first evaporator 18 is in rear, and in this series mode, the refrigerating effect of the second evaporator 19 is stronger than that of the first evaporator 18, and therefore, the evaporator with the strong refrigerating effect is the main evaporator, and the evaporator with the weak refrigerating effect is the sub-evaporator.
Specifically, in the first embodiment, the first inlet of the first solenoid valve 13 is controlled to the first end passage of the first evaporator 18, the second inlet of the second solenoid valve 14 is controlled to the first end passage of the second evaporator 19, and the third inlet of the third solenoid valve 15 is controlled to the compressor 11, so that a serial mode in which the first evaporator 18 is in front and the second evaporator 19 is behind is formed, the first air door 241 and the second air door 242 are simultaneously controlled to be opened, the third air door 243 is closed, the cold air generated by the first air cavity 21 enters the upper area of the refrigerating cavity 23 from the first air outlet 244, the cold air generated by the second air cavity 22 enters the lower area of the refrigerating cavity 23 from the second air outlet 245, and at this time, the refrigerating effect of the upper area is stronger than that of the lower area, and the zonal refrigeration in the refrigerating cavity 23 is realized.
In the second embodiment, the first liquid inlet of the first electromagnetic valve 13 is controlled to be connected to the first end of the second evaporator 19, the third liquid inlet of the third electromagnetic valve 15 is controlled to be connected to the first end of the first evaporator 18, and the second liquid inlet of the second electromagnetic valve 14 is controlled to be connected to the compressor 11, so that the serial mode of the second evaporator 19 and the first evaporator 18 at the front is realized, the first air door 241 and the second air door 242 are simultaneously controlled to be opened, the third air door 243 is closed, the cold air generated by the first air cavity 21 enters the upper area of the refrigerating cavity 23 from the first air outlet 244, the cold air generated by the second air cavity 22 enters the lower area of the refrigerating cavity 23 from the second air outlet 245, and at this time, the refrigerating effect of the lower area is stronger than that of the upper area, and the zonal refrigeration in the refrigerating cavity 23 is realized.
In the third embodiment, the first liquid inlet to first evaporator 18 passage of the first solenoid valve 13, the first liquid inlet to second evaporator 19 are controlled to be disconnected, the second liquid inlet and the third liquid inlet are respectively connected with the first end of the second evaporator 19 and the first end of the first evaporator 18, at this time, the refrigerator is in the operation state of the first evaporator 18, meanwhile, the first air door 241 and the third air door 243 are controlled to be opened, the second air door 242 is closed, so that the cold air generated by the first air cavity 21 can enter the refrigerating cavity 23 from the first air outlet 244 and the second air outlet 245 at the same time, and the air supply efficiency is improved.
In the fourth embodiment, the first liquid inlet of the first solenoid valve 13 is controlled to be disconnected from the first evaporator 18, the first liquid inlet is controlled to be connected to the second evaporator 19, the second liquid inlet and the third liquid inlet are connected to the compressor 11, the second liquid inlet and the third liquid inlet are respectively disconnected from the first end of the second evaporator 19 and the first end of the first evaporator 18, at this time, the refrigerator is in the operation state of the second evaporator 19, meanwhile, the second air door 242 and the third air door 243 are controlled to be opened, the first air door 241 is closed, and the cold air generated by the second air cavity 22 can enter the refrigeration cavity 23 from the first air outlet 244 and the second air outlet 245 at the same time, so that the air supply efficiency is improved.
Preferably, as shown in fig. 6, in the case of performing the first operation mode, the control method of the refrigerator of the present invention further includes:
s400: acquiring an upper temperature of the refrigerating chamber 23 and a lower temperature of the refrigerating chamber 23;
s500: the communication order of the first evaporator 18 and the second evaporator 19 is selectively exchanged according to the upper temperature of the refrigerating chamber 23 and the lower temperature of the refrigerating chamber 23.
Illustratively, a first temperature sensor and a second temperature sensor are respectively installed in the first air chamber 21 and the second air chamber 22 and are respectively used for detecting the return air temperatures at the return air inlet of the first air chamber 21 and the return air inlet of the second air chamber 22, so that the actual temperatures of the upper area and the lower area in the refrigerating chamber 23 can be obtained, and finally, whether the refrigerating box meets the condition of exchanging the communication sequence of the first evaporator 18 and the second evaporator 19 or not is judged according to the actual temperature difference in the two areas.
Through such setting for the fridge can be according to the change condition of the load in the different regions of box in the regional refrigeration intensity of adjustment, realizes accurate accuse temperature.
It should be noted that, in practical application, the communication sequence of the first evaporator 18 and the second evaporator 19 may be selected by the user according to the load condition of each area in the refrigerating cavity 23, or may be automatically exchanged by the controller according to the load change condition of each area, so long as the precise temperature control of the refrigerating box can be achieved, such flexible adjustment and change do not deviate from the principle and scope of the present invention, and all the flexible adjustment and change should be limited in the protection scope of the present invention, and the present invention preferably adopts the scheme that the controller automatically selects the communication sequence.
Preferably, as shown in fig. 6, the specific steps of "selectively exchanging the communication order of the first evaporator 18 and the second evaporator 19 according to the upper temperature of the refrigerating chamber 23 and the lower temperature of the refrigerating chamber 23" include:
s510: calculating the difference between the upper temperature and the lower temperature of the refrigerating cavity, and recording the difference as a second difference;
s520: comparing the second difference value with a second preset value;
s530: the communication order of the first evaporator 18 and the second evaporator 19 is selectively exchanged according to the comparison result.
The second preset value can reflect the reasonable temperature difference range in the upper and lower different areas in the refrigerating cavity 23, and when the load in any one area changes, the actual temperature difference can be changed, so that the change condition of the load in the different areas in the refrigerating cavity 23 can be reflected in real time by comparing the measured actual temperature difference with the second preset value, and the refrigerating intensity of each area can be timely regulated according to the change condition of the load, so that the temperature control of the refrigerating box is accurate and rapid.
Preferably, as shown in fig. 6, the specific step of "selectively exchanging the communication order of the first evaporator 18 and the second evaporator 19 according to the comparison result" includes:
s531: if the second difference is not greater than the second preset value, the current communication order of the first evaporator 18 and the second evaporator 19 is maintained.
S532: if the second difference is greater than the second preset value, the communication order of the first evaporator 18 and the second evaporator 19 is exchanged.
For example, the first evaporator 18 is used as the main evaporator, the second evaporator 19 is used as the auxiliary evaporator, the communication sequence is that the first evaporator 18 is in front of the second evaporator 19, the refrigerating effect of the upper area in the refrigerating cavity 23 is stronger than that of the lower area, therefore, under the condition of not changing the load of the two areas, the upper temperature is gradually lower than the lower temperature, and the upper-lower temperature difference is larger and larger until the second difference reaches the second preset value, and in the process, the first evaporator 18 and the second evaporator 19 maintain the original communication sequence, namely the first evaporator 18 is in front of the second evaporator 19.
When the second difference exceeds the second preset value, the controller changes the communication sequence of the first evaporator 18 and the second evaporator 19, so that the second evaporator 19 is in front, the first evaporator 18 is behind, at this time, the refrigerating effect of the lower area in the refrigerating cavity 23 begins to be stronger than that of the upper area, the temperature difference between the upper area and the lower area becomes smaller and smaller, the second difference is also smaller than the second preset value again, the temperature difference between the upper area and the lower area is increased again until the upper temperature is higher than the lower temperature, finally, when the second difference is higher than the second preset value, the communication sequence of the first evaporator 18 and the second evaporator 19 is changed again, and the reciprocating operation is performed, so that a certain temperature difference is kept between the upper area and the lower area all the time, the dynamic balance of the temperatures in the upper area and the lower area is realized, the temperature difference between the upper area and the lower area is prevented from being increased infinitely, and simultaneously, higher refrigerating strength can be applied to the area with high load.
Through this setting for after the load condition of two regions in the cold storage chamber 23 changed, can realize the regulation of the refrigeration intensity in two regions through the intercommunication order of change first evaporimeter 18 and second evaporimeter 19, reach the effect of accurate accuse temperature.
Finally, the invention also provides a refrigerator comprising a controller configured to perform the control method described above.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (10)
1. A control method of a refrigerator is characterized in that the refrigerator comprises a refrigerator body, a compressor, a condenser, a first throttling device, a second throttling device, a first evaporator, a second evaporator, a first electromagnetic valve, a second electromagnetic valve and a fan, wherein the refrigerator body comprises a refrigerating cavity, a wind cavity and a wind channel, the wind channel is used for communicating the refrigerating cavity with the wind cavity, the first evaporator, the second evaporator and the fan are all arranged in the wind cavity,
The first electromagnetic valve is provided with a first liquid inlet and two first liquid outlets, the first liquid inlet can be communicated with one first liquid outlet at the same time, the second electromagnetic valve is provided with a second liquid inlet and two second liquid outlets, the second liquid inlet can be communicated with one second liquid outlet at the same time, the air outlet of the compressor is communicated with the first end of the condenser, the second end of the condenser is communicated with the first liquid inlet, the two first liquid outlets are respectively communicated with the first ends of the first evaporator and the second evaporator, the second ends of the first evaporator and the second evaporator are respectively communicated with the second liquid inlet and the air return opening of the compressor, the two second liquid outlets are respectively communicated with the air return opening of the compressor and the first end of the first evaporator,
the control method comprises the following steps:
acquiring the actual temperature of the refrigerating cavity;
acquiring a target set temperature of the refrigerating cavity;
selectively executing a first operation mode or a second operation mode according to the actual temperature of the refrigerating chamber and the target set temperature;
wherein the first evaporator and the second evaporator are operated in series when the first mode of operation is performed; the first and second evaporators are operated in parallel and alternately while the second mode of operation is being performed.
2. The control method according to claim 1, wherein the specific step of selectively performing the first operation mode or the second operation mode according to the actual temperature of the refrigerating chamber and the target set temperature comprises:
calculating a difference between the actual temperature of the refrigerating cavity and the target set temperature, and recording the difference as a first difference;
comparing the first difference value with a first preset value;
and selectively executing the first working mode or the second working mode according to the comparison result.
3. The control method according to claim 2, wherein the specific step of selectively executing the first operation mode or the second operation mode according to the comparison result includes:
and if the first difference value is larger than the first preset value, executing the first working mode.
4. The control method according to claim 2, wherein the specific step of selectively executing the first operation mode or the second operation mode according to the comparison result includes:
and if the first difference value is not larger than the first preset value, executing the second working mode.
5. The control method of claim 2, wherein the refrigerator further comprises a third solenoid valve having one third liquid inlet and two third liquid outlets, the third liquid inlet being capable of communicating with only one third liquid outlet at the same time, the third liquid inlet being in communication with the second end of the second evaporator, the two third liquid outlets being in communication with the liquid inlet of the compressor and the first end of the first evaporator, respectively,
the air cavity comprises a first air cavity and a second air cavity, the first air cavity is positioned above the refrigerating cavity, the second air cavity is positioned below the refrigerating cavity, the fan comprises a first fan and a second fan, the first evaporator and the first fan are both arranged in the first air cavity, the second evaporator and the second fan are both arranged in the second air cavity, two ends of the air channel are respectively communicated with the first air cavity and the second air cavity, a first air outlet and a second air outlet which are respectively communicated with the upper part and the lower part of the refrigerating cavity are arranged on the air channel,
the refrigerator further comprises a first air door, a second air door and a third air door, wherein the first air door is located at the joint of the first air cavity and the air duct, the second air door is located at the joint of the second air cavity and the air duct, and the third air door is located between the first air outlet and the second air outlet and can control the on-off of the air duct.
6. The control method according to claim 5, characterized in that in the case where the first operation mode is performed, the control method further comprises:
acquiring the upper temperature of the refrigerating cavity and the lower temperature of the refrigerating cavity;
the communication sequence of the first evaporator and the second evaporator is selectively exchanged according to the upper temperature and the lower temperature of the refrigerating chamber.
7. The control method according to claim 6, wherein the specific step of selectively exchanging the communication order of the first evaporator and the second evaporator according to the upper temperature and the lower temperature of the refrigerating chamber includes:
calculating the difference between the upper temperature and the lower temperature of the refrigerating cavity and recording the difference as a second difference;
comparing the second difference value with a second preset value;
and selectively exchanging the communication sequence of the first evaporator and the second evaporator according to the comparison result.
8. The control method according to claim 7, wherein the specific step of selectively exchanging the communication order of the first evaporator and the second evaporator according to the comparison result includes:
And if the second difference value is not greater than the second preset value, maintaining the current communication sequence of the first evaporator and the second evaporator.
9. The control method according to claim 7, wherein the specific step of selectively exchanging the communication order of the first evaporator and the second evaporator according to the comparison result includes:
and if the second difference value is larger than the second preset value, exchanging the communication sequence of the first evaporator and the second evaporator.
10. A refrigerator comprising a controller, wherein the controller is configured to be able to perform the control method of any one of claims 1 to 9.
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| CN202310252651.9A CN116147280A (en) | 2023-03-15 | 2023-03-15 | Refrigerator control method and refrigerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116353299A (en) * | 2023-06-01 | 2023-06-30 | 吉林大学 | Electric automobile thermal management system with variable refrigeration sequence and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116353299A (en) * | 2023-06-01 | 2023-06-30 | 吉林大学 | Electric automobile thermal management system with variable refrigeration sequence and control method |
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