CN110398111B - Accurate humidifying device of air-cooled refrigerator and control method thereof - Google Patents
Accurate humidifying device of air-cooled refrigerator and control method thereof Download PDFInfo
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- CN110398111B CN110398111B CN201910804007.1A CN201910804007A CN110398111B CN 110398111 B CN110398111 B CN 110398111B CN 201910804007 A CN201910804007 A CN 201910804007A CN 110398111 B CN110398111 B CN 110398111B
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- refrigerator
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- refrigerating chamber
- humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/045—Air flow control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- 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
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0413—Treating air flowing to refrigeration compartments by purification by humidification
- F25D2317/04131—Control means therefor
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention discloses an accurate humidifying device of an air-cooled refrigerator and a control method thereof, and relates to the technical field of refrigerators. The invention comprises a refrigerator body, a refrigerating chamber, a freezing chamber, a refrigerating system, an air circulation system, a defrosting system and a humidifying device. According to the invention, the main control board of the refrigerator calculates the average humidity Hav in the refrigerating chamber refrigeration and shutdown humidifying process, calculates the difference delta H between the average humidity Hav and a preset humidity threshold H, and determines the shutdown humidifying time Soff for one time of washing; the no-load average humidity of the refrigerating chamber is controlled to be between 20 and 90 percent, and the adjustment precision reaches 1 percent; the humidity of the refrigerating chamber of the air-cooled refrigerator can meet the storage requirements of various food materials, not only can keep the relative humidity about 50 percent for storing dry goods and tea leaves, but also can keep the relative humidity above 80 percent for storing fruits and vegetables; the adjusting range is large, the cost is low, and the precision is high.
Description
Technical Field
The invention belongs to the technical field of refrigerators, and particularly relates to an accurate humidifying device of an air-cooled refrigerator and a control method thereof.
Background
The occupancy of air-cooled refrigerators in the refrigerator market is increased year by year, and the air-cooled refrigerators are divided into two types, namely a single-system air-cooled refrigerator and a multi-system air-cooled refrigerator, and the main difference is whether a refrigerating chamber is provided with an evaporator or not. The single-system air-cooled refrigerator without an evaporator in the refrigerating chamber is favored by consumers due to high cost performance. However, compared with a double-system air-cooled refrigerator, the biggest disadvantage of the single-system air-cooled refrigerator is that the relative humidity in the refrigerating chamber is too low, the average no-load is generally 20% -30% Rh, and the humidity is difficult to adjust. The preservation of various food materials has different requirements for relative humidity, for example, the relative humidity of dried goods and tea leaves is less than 45%, the relative humidity of cosmetics and medicines is 50-60%, and the relative humidity of fruits and vegetables is more than 80%. The relative humidity directly influences the quality of the food material fresh-keeping effect. The relative humidity of a single-system air-cooled refrigerator is too low, the humidity control means is limited, and the humidity cannot be adjusted or the humidity adjusting cost is too high, so that the current situation in the industry exists.
The invention provides an air-cooled refrigerator accurate humidifying device and a control method thereof, wherein the average humidity Hav in refrigerating and shutdown humidifying processes of a refrigerating chamber is calculated through a main control board of the refrigerator, the difference delta H between the average humidity Hav and a preset humidity threshold H is calculated, and the shutdown humidifying time Soff for one time of washing is determined; the no-load average humidity of the refrigerating chamber is controlled to be 20% -90%, and the adjustment precision reaches 1%.
Disclosure of Invention
The invention aims to provide an air-cooled refrigerator accurate humidifying device and a control method thereof, wherein the average humidity Hav in the refrigerating and shutdown humidifying processes of a refrigerating chamber is calculated through a refrigerator main control board, the difference delta H between the average humidity Hav and a preset humidity threshold H is calculated, and the shutdown humidifying time Soff for one time of washing is determined; the no-load average humidity of the refrigerating chamber is controlled to be 20% -90%, and the adjustment precision reaches 1%.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an accurate humidifying device of an air-cooled refrigerator, which comprises: the refrigerator comprises a refrigerator body, a refrigerating chamber, a freezing chamber, a refrigerating system, an air circulation system, a defrosting system and a humidifying device;
the refrigeration system comprises a compressor, an evaporator, a capillary tube, a filter and a condenser; the compressor is arranged in a compressor cavity below the refrigerating chamber; the evaporator is communicated with the compressor and is arranged in an evaporator cavity at the rear side of the freezing chamber;
the air circulation system comprises a freezing chamber air channel, a refrigerating chamber air channel and a refrigerating return air channel; one end of the freezing chamber air channel is communicated with the upper part of the evaporator cavity, and the other end of the freezing chamber air channel is communicated with the refrigerating chamber air channel; a refrigerating fan is arranged in the air duct of the freezing chamber; an electric air door is arranged at the joint of the refrigerating return air duct and the freezing chamber air duct; one end of the refrigerating return air channel is communicated with the refrigerating chamber through a refrigerating chamber return air inlet, and the other end of the refrigerating return air channel is communicated with the lower part of the evaporator cavity;
the defrosting system comprises a defrosting heater, a water receiving disc and a drain pipe; the defrosting heater is arranged at the bottom of the evaporator cavity; one end of the drain pipe is communicated with the bottom of the hair-dryer cavity, and the other end of the drain pipe is connected to a water receiving disc at the bottom of the refrigerator body;
the humidifying device is arranged between the refrigerator side wall and the refrigerating chamber liner; the humidifying device comprises a connecting pipe, a one-way floating ball valve cavity and a fresh air fan; one end of the connecting pipe extending out of the refrigerator side wall is provided with an air vent cover; the other end of the connecting pipe is communicated with the bottom end of the vertically placed one-way floating ball valve cavity; a floating ball is arranged in the one-way floating ball valve cavity; one side of the one-way floating ball valve cavity is communicated with the fan protection cover; the fan protection cover is fixed on the outer wall of the inner container of the refrigerating chamber and is communicated with the refrigerating chamber; the diameter of the floating ball is larger than that of the inlet of the one-way floating ball valve cavity and smaller than that of the one-way floating ball valve cavity, and is characterized in that,
a refrigerator temperature sensor is arranged on the inner side wall of the refrigerator; a freezing chamber temperature sensor is arranged on the inner side wall of the freezing chamber; an evaporator temperature sensor is arranged on the evaporator; a main control board of the refrigerator is arranged at the rear side of the refrigerator body; the refrigerator main control board is electrically connected with the electric air door, the refrigerating room temperature and humidity sensor, the freezing room temperature sensor, the refrigerating fan, the compressor, the defrosting heater, the evaporator temperature sensor and the fresh air fan respectively.
Preferably, the air duct of the freezing chamber is provided with a plurality of freezing air outlets communicated with the freezing chamber; the refrigerating chamber air duct is provided with a plurality of refrigerating air outlets communicated with the refrigerating chamber.
Preferably, the refrigerating chamber liner is also provided with an adsorbent protective cover provided with a plurality of through holes; the absorbent protective cover corresponds to the fan protective cover in position; and the inner side of the adsorbent protecting cover is fixedly provided with a porous adsorbent.
Preferably, an annular fan cover sealing ring is arranged on the inner side wall of the fan protection cover.
Preferably, the top of the one-way floating ball valve cavity is provided with a movable sealing cover; and a reticular baffle is arranged at the communication part of the unidirectional floating ball valve cavity and the fan protection cover.
Preferably, the humidifying device is arranged at the upper part of the refrigerating chamber; the fresh air fan, the unidirectional floating ball valve cavity and the connecting pipe are distributed from top to bottom.
A control method of an accurate humidifying device of an air-cooled refrigerator comprises the following steps:
when any compartment of the air-cooled refrigerator requests refrigeration to the main control board of the refrigerator;
s00: the main control board of the refrigerator judges whether the temperature of the refrigerating chamber is greater than a refrigerating starting point Ton; if yes, executing S01; if not, keeping the current state;
s01: the main control board of the refrigerator controls the opening of the electric air door, the refrigerating fan and the compressor to refrigerate the refrigerating chamber; meanwhile, the refrigerating room temperature and humidity sensor transmits the monitored humidity of the refrigerating room to a main control board of the refrigerator every 30 seconds;
s02: the main control board of the refrigerator judges whether the temperature of the refrigerating chamber is less than a refrigerating stop point Toff; if yes, recording the total refrigerating time Son of the refrigerating chamber and executing S03; if not, keeping the current state;
s03: the main control board of the refrigerator turns off the electric air door to cool the freezing chamber, and simultaneously, opens the fresh air fan to humidify the refrigerating chamber;
s04: the main control board of the refrigerator judges whether the current humidity of the refrigerating chamber reaches a preset humidity threshold H or not; if yes, the main control board of the refrigerator controls the fresh air fan to be turned off, records the shutdown humidification time Soff and executes S05; if not, the current state is maintained;
s05: the main control board of the refrigerator calculates the average humidity Hav in the refrigerating chamber refrigerating and shutdown humidifying process and calculates the difference delta H between the average humidity Hav and a preset humidity threshold H;
s06: the refrigerator main control board judges that delta H=0; if yes, soff remains unchanged; if not, executing S07;
s07: the refrigerator main control board judges delta H >0; if yes, soff=soff-n and S00 is performed; if not, soff=soff+n and performs S00;
where n is the shutdown humidification time per increase.
Preferably, the average humidity Hav calculation method in S05 is:
Hav＝∑(Hoff+H30s+H60s……HON)/(Son+Soff)；
wherein, hoff is the humidity value in the refrigerating chamber when the fresh air fan is closed; the HON is a humidity value in the refrigerating chamber when the electric air door is opened; the H30s is a humidity value in the refrigerating chamber after the electric air door is opened for 30 s; the H60s is a humidity value in the refrigerating chamber after the electric air door is opened for 60 s.
One aspect of the present invention has the following beneficial effects:
according to the invention, the main control board of the refrigerator calculates the average humidity Hav in the refrigerating chamber refrigeration and shutdown humidifying process, calculates the difference delta H between the average humidity Hav and a preset humidity threshold H, and determines the shutdown humidifying time Soff for one time of washing; the no-load average humidity of the refrigerating chamber is controlled to be between 20 and 90 percent, and the adjustment precision reaches 1 percent; the humidity of the refrigerating chamber of the air-cooled refrigerator can meet the storage requirements of various food materials, and the air-cooled refrigerator not only can be used for storing dry goods and tea (the relative humidity is below 45 percent), but also can be used for storing cosmetics and medicines (the relative humidity is about 50 percent) and fruits and vegetables (the relative humidity is above 80 percent); the adjusting range is large, the cost is low, and the precision is high.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a side cross-sectional view of an air-cooled moisturizing refrigerator of the present invention when closed;
fig. 2 is a schematic diagram of a front view direction of an air-cooled moisturizing refrigerator when the refrigerator is not closed;
fig. 3 is an enlarged view of a in fig. 2;
FIG. 4 is a flow chart of a method of controlling an accurate humidification device of an air-cooled refrigerator according to the present invention;
FIG. 5 is a table showing absolute humidity versus relative humidity.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "open," "upper," "middle," "length," "inner," and the like indicate an orientation or a positional relationship, and are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-5, the present invention is an accurate humidifying device for an air-cooled refrigerator, comprising: the refrigerator comprises a refrigerator body, a refrigerating chamber 1, a freezing chamber 2, a refrigerating system, an air circulation system, a defrosting system and a humidifying device;
the refrigeration system includes a compressor 31, an evaporator 32, a capillary tube, a filter, and a condenser; the compressor 31 is installed in the compressor chamber below the refrigerating chamber 1; the evaporator 32 is communicated with the compressor 31 and the evaporator 32 is installed in an evaporator cavity at the rear side of the refrigerating chamber 1; the specific use is as follows: the main control board of the refrigerator controls the compressor 31 and the refrigerating fan 22 to be opened, so that cold air is blown into the freezing chamber 2 for refrigeration; meanwhile, the main control board of the refrigerator controls cold air blowing and refrigeration to the refrigerating chamber through controlling the electric air door 13; since the evaporator 32 is kept below the low temperature of-18 ℃ for a long time, the temperature is far lower than the dew point temperature of the refrigerating chamber, and after cold air enters the refrigerating chamber 1 through the electric freezing chamber air duct 21 and the refrigerating chamber air duct 11, most of the water vapor in the cold air is condensed on the evaporator to become frost in the evaporator chamber, so that the relative humidity in the refrigerating chamber 1 is only 20-30%.
The air circulation system comprises a freezing chamber air duct 21, a refrigerating chamber air duct 11 and a refrigerating return air duct 12; one end of the freezing chamber air duct 21 is communicated with the upper part of the evaporator cavity, and the other end is communicated with the refrigerating chamber air duct 11; a refrigerating fan 22 is arranged in the freezing chamber air duct 21; an electric air door 13 is arranged at the joint of the refrigerating return air duct 12 and the freezing chamber air duct 21; one end of the refrigerating return air channel 12 is communicated with the refrigerating chamber 1 through a refrigerating chamber return air inlet, and the other end is communicated with the lower part of the evaporator cavity;
the defrosting system comprises a defrosting heater 33, a water receiving disc 35 and a drain pipe 34; the defrosting heater 33 is arranged at the bottom of the evaporator cavity; one end of the drain pipe 34 is communicated with the bottom of the hair-dryer cavity, and the other end is connected to a water receiving disc 35 at the bottom of the refrigerator body; the specific use is as follows: the main control board 5 of the refrigerator controls the defrosting heater 33 to start, the evaporator 32 is defrosted after heating, the defrosted water is discharged out of the water receiving disc 35 of the refrigerator through the drain pipe 34, and a high-temperature drain pipe is arranged in the water receiving disc 35 and used for evaporating the defrosted water;
the humidifying device is arranged between the refrigerator side wall 1a and the refrigerating chamber liner 1 b; the humidifying device comprises a connecting pipe 41, a one-way floating ball valve cavity 42 and a fresh air fan 43; one end of the connecting pipe 41 extending out of the refrigerator side 1a is provided with a vent cover 411; the other end of the connecting pipe 41 is communicated with the bottom end of a vertically arranged one-way floating ball valve cavity 42; a floating ball 44 is arranged in the unidirectional floating ball valve cavity 42; one side of the one-way floating ball valve cavity 42 is communicated with a fan protection cover 431; the fan protection cover 431 is fixed on the outer wall of the inner container 1b of the refrigerating chamber and is communicated with the refrigerating chamber 1; the float ball 44 has a float ball diameter greater than the inlet diameter of the one-way float ball valve cavity 42 and a cavity diameter smaller than the one-way float ball valve cavity 42,
the specific use is as follows: the main control board of the refrigerator controls the fresh air fan 43 to rotate, the air suction surface of the fresh air fan 43 faces air outside the refrigerator body, and the air blowing surface faces the refrigerating chamber 1; the floating ball 44 in the one-way floating ball valve cavity 42 is lifted, and the outside high-humidity air enters the refrigerating chamber 1, so that the rapid humidification is realized; when the refrigerating system and the air circulation system are started for a certain time, the air pressure in the refrigerating chamber 1 is smaller than the external air pressure, and when the floating ball 44 is lifted up, the external high-humidity air enters the refrigerating chamber 1, so that the rapid humidification is realized;
from the thermodynamic perspective, the temperature and absolute humidity determine the relative humidity of the space; wherein, the absolute humidity refers to how much water vapor is contained in the gas; relative humidity refers to the ratio of absolute humidity to the saturated water vapor content of the temperature expressed in percent. When the refrigerating chamber 1 of the common air-cooled single-system refrigerator is refrigerated, most of absolute humidity is brought to the low-temperature evaporator 32 to be condensed through air circulation; after stopping the cooling, the relative humidity rises slowly and the peak is low, resulting in too low average relative humidity.
It is known from the air conditioning theory that absolute humidity contained in the same relative humidity is different at different temperatures. The higher the temperature, the greater the absolute humidity in the air; as can be seen from the table in fig. 5, the humidity of the refrigerating chamber 1 is practically supplemented with several grams of absolute humidity to humidify the refrigerating chamber;
assuming that a relative humidity of 70% is desired in a 1m3 environment at 5 ℃, only 5.09g of water vapor needs to be added to the space. In the natural state, the air-cooled refrigerator cannot supplement enough water vapor into the refrigerating chamber through gaps such as door seals, rotating beams and the like. Therefore, the invention aims at the problem, and introduces air with high external moisture content into the refrigerating chamber 1 by using a forced convection method, and completes moisture supplement in a short time, so that the average value of relative humidity in the single-system air-cooled refrigerator is improved from 20% to 70%, the level of the double-system refrigerator is reached, and the fruit and vegetable fresh-keeping effect is greatly improved;
a refrigerator temperature sensor 14 is arranged on the inner side wall of the refrigerator 1; a freezing chamber temperature sensor 23 is arranged on the inner side wall of the freezing chamber 2; the evaporator 32 is provided with an evaporator temperature sensor 36; a main control board 5 of the refrigerator is arranged at the rear side of the refrigerator body; the refrigerator main control board 5 is electrically connected with the electric air door 13, the refrigerating room temperature and humidity sensor 14, the freezing room temperature sensor 23, the refrigerating fan 22, the compressor 31, the defrosting heater 33, the evaporator temperature sensor 36 and the fresh air fan 43 respectively.
Wherein, the freezing chamber air duct 21 is provided with a plurality of freezing air outlets communicated with the freezing chamber 2; the refrigerating chamber air duct 11 is provided with a plurality of refrigerating air outlets communicated with the refrigerating chamber 1.
Wherein, the refrigerating chamber liner 1b is also provided with an adsorbent protective cover 45 provided with a plurality of through holes; the absorbent protective cover 45 corresponds to the fan protective cover 431 in position; the porous adsorbent 451 is fixed inside the adsorbent protective cover 45; can adsorb the small particle dust and dust oil smoke peculiar smell in the air, ensure that the fresh air sent into the refrigerating chamber is clean and odorless.
Wherein, the inner side wall of the fan protection cover 431 is provided with an annular fan cover sealing ring 432; the annular fan cover sealing ring 432 is composed of sponge, rubber and the like; is used for sealing, damping and reducing noise.
Wherein, the movable sealing cover 421 is arranged at the top of the one-way floating ball valve cavity 42; a reticular baffle 422 is arranged at the communication part of the unidirectional floating ball valve cavity 42 and the fan protection cover 431; the float ball 44 is prevented from entering the fan guard 431.
Wherein, the humidifying device is arranged at the upper part of the refrigerating chamber 1; the fresh air fan 43, the one-way floating ball valve cavity 42 and the connecting pipe 41 are distributed from top to bottom.
A control method of an accurate humidifying device of an air-cooled refrigerator comprises the following steps:
when any compartment of the air-cooled refrigerator requests refrigeration to the refrigerator main control board 5;
s00: the main control board 5 of the refrigerator judges whether the temperature of the refrigerating chamber is greater than a refrigerating start point Ton; if yes, executing S01; if not, keeping the current state; here, the temperature in the evaporator chamber increases due to the stoppage of the compressor 31 and the cooling fan 22 before, the relative humidity of the air in the evaporator chamber is high, and at this time, the refrigerating chamber 1 is cooled first, and the humidity in the refrigerating chamber 1 drops relatively slowly;
s01: the main control board 5 of the refrigerator controls and opens the electric air door 13, the refrigerating fan 22 and the compressor 31 to refrigerate the refrigerating chamber 1; meanwhile, the refrigerating room temperature humidity sensor 14 transmits the monitored refrigerating room humidity to the refrigerator main control board 5 every 30 seconds; in the refrigerating process of the refrigerating chamber 1, the refrigerating fan 22 continuously blows cold air into the refrigerating chamber 1, so that the air pressure in the refrigerating chamber 1 is larger than the external atmospheric pressure of the refrigerator; therefore, the floating ball 44 is in a natural falling state, and plugs the inlet of the one-way floating ball valve cavity to prevent the cold air from leaking out;
s02: the main control board 5 of the refrigerator judges whether the temperature of the refrigerating chamber is less than the refrigerating stop point Toff; if yes, recording the total refrigerating time Son of the refrigerating chamber and executing S03; if not, keeping the current state; here, the refrigerating stop point Toff is smaller than the refrigerating start point Ton, and the refrigerating stop point Toff and the refrigerating start point Ton are temperature intervals maintained by the refrigerating chamber 1;
s03: the main control board 5 of the refrigerator closes the electric air door 13 to turn to the freezing chamber 2 for refrigerating, and simultaneously opens the fresh air fan 43 to humidify the refrigerating chamber 1; in the process, as the freezing chamber 2 is refrigerated, the air in the refrigerating chamber 1 returns to the evaporator cavity through the refrigerating return air duct 12, so that the air pressure in the refrigerating chamber 1 is smaller than the atmospheric pressure outside the refrigerator, the floating ball 44 is lifted, and the high-humidity air outside the refrigerator enters the refrigerating chamber 1 through the connecting pipe 41 and the one-way floating ball valve cavity 42 to humidify the refrigerating chamber 1; meanwhile, the fresh air fan 43 is turned on, so that the humidifying efficiency is improved, the humidity in the refrigerating chamber 1 is improved in a shorter time, and the influence on the refrigerating effect due to the fact that too much cold is leaked for a longer time is avoided; in addition, the floating ball 44 can be kept in a lifted state under the action of the fresh air fan 43; in fact, after the fresh air fan 43 is simply turned on, the fresh air fan 43 blows air in the one-way float ball valve cavity 42 into the refrigerating chamber 1, the air pressure in the one-way float ball valve cavity 42 is reduced, and the float ball 44 can be lifted;
s04: the main control board 5 of the refrigerator judges whether the current humidity of the refrigerating chamber reaches a preset humidity threshold H; if yes, the refrigerator main control board 5 controls the fresh air fan 43 to be turned off, records the shutdown humidification time Soff and executes S05; if not, the current state is maintained; specifically, when the fresh air fan 43 is stopped, the air pressure in the refrigerating chamber 1 is greater than the air pressure outside the refrigerator, the floating ball 44 is in a naturally falling state, and the inlet of the one-way floating ball valve cavity is blocked to prevent the cold air from leaking out;
s05: the main control board 5 of the refrigerator calculates the average humidity Hav in the refrigerating chamber refrigerating and shutdown humidifying process and calculates the difference delta H between the average humidity Hav and a preset humidity threshold H;
s06: judging DeltaH=0 by the refrigerator main control board 5; if yes, soff remains unchanged; if not, executing S07;
s07: judging delta H >0 by the main control board 5 of the refrigerator; if yes, soff=soff-n and S00 is performed; if not, soff=soff+n and performs S00;
where n is the shutdown humidification time per increase; by using the S05-S07 method, whether the running time of the fresh air fan 43 is increased to Sfon+n or shortened to Sfon-n in the next refrigeration, the average humidity is increased, and the relative humidity is reduced; because the longer the fresh air fan 43 is operated, the higher the highest point of the relative humidity, and conversely, the shorter the operation time is, the lower the highest point of the relative humidity is, by virtue of this means, the adjustment of the average humidity is realized.
The average humidity Hav calculation method in S05 is as follows:
Hav＝∑Hoff+H30s+H60s……HON/Son+Soff；
wherein Hoff is the humidity value in the refrigerating chamber 1 when the fresh air fan 43 is turned off; HON is the humidity value in the refrigerating chamber 1 when the electric damper 13 is opened; h30s is the humidity value in the refrigerating chamber 1 after the electric damper 13 is opened for 30 s; h60s is the humidity value in the refrigerating compartment 1 after 60s from the opening of the electric damper 13.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. An air-cooled refrigerator precision humidification device, comprising: the refrigerator comprises a refrigerator body, a refrigerating chamber (1), a freezing chamber (2), a refrigerating system, an air circulation system, a defrosting system and a humidifying device;
the refrigeration system comprises a compressor (31), an evaporator (32), a capillary tube, a filter and a condenser; the compressor (31) is arranged in a compressor cavity below the refrigerating chamber (1); the evaporator (32) is communicated with the compressor (31), and the evaporator (32) is arranged in an evaporator cavity at the rear side of the freezing chamber (2);
the air circulation system comprises a freezing chamber air duct (21), a refrigerating chamber air duct (11) and a refrigerating return air duct (12); one end of the freezing chamber air duct (21) is communicated with the upper part of the evaporator cavity, and the other end of the freezing chamber air duct is communicated with the refrigerating chamber air duct (11); a refrigerating fan (22) is arranged in the freezing chamber air duct (21); an electric air door (13) is arranged at the joint of the refrigerating chamber air duct (11) and the freezing chamber air duct (21); one end of the refrigerating return air channel (12) is communicated with the refrigerating chamber (1) through a refrigerating chamber return air inlet, and the other end of the refrigerating return air channel is communicated with the lower part of the evaporator cavity;
the defrosting system comprises a defrosting heater (33), a water receiving disc (35) and a drain pipe (34); the defrosting heater (33) is arranged at the bottom of the evaporator cavity; one end of the drain pipe (34) is communicated with the bottom of the evaporator cavity, and the other end of the drain pipe is connected to a water receiving disc (35) at the bottom of the refrigerator body;
the humidifying device is arranged between the refrigerator side wall (1 a) and the refrigerating chamber liner (1 b); the humidifying device comprises a connecting pipe (41), a one-way floating ball valve cavity (42) and a fresh air fan (43); one end of the connecting pipe (41) extending out of the refrigerator side wall (1 a) is provided with a vent cover (411); the other end of the connecting pipe (41) is communicated with the bottom end of a vertically placed one-way floating ball valve cavity (42); a floating ball (44) is arranged in the one-way floating ball valve cavity (42); one side of the one-way floating ball valve cavity (42) is communicated with a fan protection cover (431); the fan protection cover (431) is fixed on the outer wall of the inner container (1 b) of the refrigerating chamber and is communicated with the refrigerating chamber (1); the diameter of the floating ball (44) is larger than that of the inlet of the unidirectional floating ball valve cavity (42) and smaller than that of the unidirectional floating ball valve cavity (42), and is characterized in that,
a refrigerating room temperature and humidity sensor (14) is arranged on the inner side wall of the refrigerating room (1); a freezing chamber temperature sensor (23) is arranged on the inner side wall of the freezing chamber (2); an evaporator temperature sensor (36) is arranged on the evaporator (32); a refrigerator main control board (5) is arranged at the rear side of the refrigerator body; the refrigerator main control board (5) is respectively and electrically connected with the electric air door (13), the refrigerating room temperature and humidity sensor (14), the freezing room temperature sensor (23), the refrigerating fan (22), the compressor (31), the defrosting heater (33), the evaporator temperature sensor (36) and the fresh air fan (43);
the control method of the precise humidifying device of the air-cooled refrigerator is characterized by comprising the following steps of:
when any compartment of the air-cooled refrigerator requests refrigeration from a refrigerator main control board (5);
s00: the main control board (5) of the refrigerator judges whether the temperature of the refrigerating chamber is higher than a refrigerating start point Ton; if yes, executing S01; if not, keeping the current state;
s01: the main control board (5) of the refrigerator controls and opens the electric air door (13), the refrigerating fan (22) and the compressor (31) to refrigerate the refrigerating chamber (1); simultaneously, the refrigerating room temperature and humidity sensor (14) transmits the monitored humidity of the refrigerating room to the main control board (5) of the refrigerator every 30 seconds;
s02: the main control board (5) of the refrigerator judges whether the temperature of the refrigerating chamber is less than a refrigerating stop point Toff; if yes, recording the total refrigerating time Son of the refrigerating chamber and executing S03; if not, keeping the current state;
s03: the main control board (5) of the refrigerator closes the electric air door (13) to turn to the freezing chamber (2) for refrigerating, and simultaneously opens the fresh air fan (43) for humidifying the refrigerating chamber (1);
s04: the main control board (5) of the refrigerator judges whether the current humidity of the refrigerating chamber reaches a preset humidity threshold H or not; if yes, the refrigerator main control board (5) controls the fresh air fan (43) to be closed, records the shutdown humidifying time Soff and executes S05; if not, the current state is maintained;
s05: the main control board (5) of the refrigerator calculates the average humidity Hav in the refrigerating chamber refrigerating and shutdown humidifying process and calculates the difference delta H between the average humidity Hav and a preset humidity threshold H;
s06: the refrigerator main control board (5) judges delta H=0; if yes, soff remains unchanged; if not, executing S07;
s07: the refrigerator main control board (5) judges delta H >0; if yes, soff=soff-n and S00 is performed; if not, soff=soff+n and performs S00;
where n is the shutdown humidification time per increase;
the average humidity Hav in S05 is calculated as follows:
Hav＝∑(Hoff+H30s+H60s……HON)/(Son+Soff)；
wherein, hoff is the humidity value in the refrigerating chamber (1) when the fresh air fan (43) is closed; the HON is a humidity value in the refrigerating chamber (1) when the electric air door (13) is opened; the H30s is a humidity value in the refrigerating chamber (1) after the electric air door (13) is opened for 30 s; the H60s is a humidity value in the refrigerating chamber (1) after the electric air door (13) is opened for 60 s.
2. The precise humidifying device of an air-cooled refrigerator according to claim 1, wherein the freezing chamber air duct (21) is provided with a plurality of freezing air outlets communicated with the freezing chamber (2); the refrigerating chamber air duct (11) is provided with a plurality of refrigerating air outlets communicated with the refrigerating chamber (1).
3. The precise humidifying device of an air-cooled refrigerator according to claim 1, wherein the refrigerating chamber liner (1 b) is further provided with an adsorbent protective cover (45) provided with a plurality of through holes; the absorbent protection cover (45) corresponds to the fan protection cover (431) in position; the porous adsorbent (451) is fixed inside the adsorbent protective cover (45).
4. The precise humidifying device for an air-cooled refrigerator according to claim 1, wherein an annular fan cover sealing ring (432) is installed on the inner side wall of the fan cover (431).
5. The precise humidifying device of an air-cooled refrigerator according to claim 1, wherein a movable sealing cover (421) is arranged at the top of the unidirectional floating ball valve cavity (42); a reticular baffle (422) is arranged at the communication part of the unidirectional floating ball valve cavity (42) and the fan protection cover (431).
6. An air-cooled refrigerator precision humidifier according to claim 1, wherein the humidifier is provided in the upper part of the refrigerating chamber (1); the fresh air fan (43), the one-way floating ball valve cavity (42) and the connecting pipe (41) are distributed from top to bottom.
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| CN111486634A (en) * | 2020-04-03 | 2020-08-04 | 合肥华凌股份有限公司 | Refrigeration equipment, control method thereof and computer readable storage medium |
| CN113865200B (en) * | 2021-10-08 | 2022-08-23 | 珠海格力电器股份有限公司 | Freezing and refrigerating equipment and control method and computer readable storage medium thereof |
| CN115164472A (en) * | 2022-07-20 | 2022-10-11 | 长虹美菱股份有限公司 | A kind of refrigerator |
| CN115289778B (en) * | 2022-08-17 | 2024-04-12 | 长虹美菱股份有限公司 | Temperature and humidity control method and device for medicine refrigerator |
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