CN211575653U

CN211575653U - Accurate humidifying cavity of air-cooled refrigerator

Info

Publication number: CN211575653U
Application number: CN201921433144.0U
Authority: CN
Inventors: 程琳
Original assignee: Changhong Meiling Co Ltd
Current assignee: Changhong Meiling Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-09-25
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses an accurate humidifying cavity of forced air cooling refrigerator relates to refrigerator humidifying technical field. The utility model comprises a humidifying chamber arranged in the cold storage chamber; the humidifying chamber is a chamber surrounded by a coaming, a drawer and a sealing strip; the coaming is fixed on the inner side wall of the refrigerating chamber and the bottom surface of the refrigerating chamber to form a drawer box; the drawer is arranged in the drawer box in a sliding way; the drawer and the drawer box are sealed through a sealing strip; the humidity control device is arranged between the side wall of the refrigerator and the inner wall of the humidity control chamber. The utility model discloses after the humidifying cavity temperature and the humidifying cavity humidity of humiture sensor transmission were received to the refrigerator main control board, the switch of control compressor, air-cooler, cold-stored wind channel electric air door and humidifying cavity electric air door realized the humidity control in the inside humidifying cavity of refrigerator, realized that food is preserved under suitable humidity, extension food save time, the cold-stored preservation of moisturizing that is suitable for different food.

Description

Accurate humidifying cavity of air-cooled refrigerator

Technical Field

The invention belongs to the technical field of refrigerator humidity adjustment, and particularly relates to an accurate humidity adjustment chamber of an air-cooled refrigerator.

Background

The share of the air-cooled refrigerators in the refrigerator market is increased year by year, and the air-cooled refrigerators are divided into two types, namely single-system air-cooled refrigerators and multi-system air-cooled refrigerators, 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 popular with consumers due to high cost performance. However, the biggest disadvantage of the single-system air-cooled refrigerator is that the relative humidity in the refrigerating chamber is too low, the average idle load is generally between 20% and 30% of Rh, and the humidity is difficult to adjust. The preservation of various food materials has different requirements on relative humidity, for example, the relative humidity of dry goods and tea leaves is required to be less than 45%, the relative humidity of cosmetics and medicines is required to be 50-60%, and the relative humidity of fruits and vegetables is required to be more than 80%. The relative humidity directly influences the quality of the food material fresh-keeping effect.

In the single-system refrigerator, one or more relatively sealed independent areas are separately divided, so that a method for realizing a drying area in the drying area (with the relative humidity below 45%) and a moisturizing area (with the relative humidity above 90%) is that the current situation that the humidity of a refrigerating chamber of the single-system refrigerator is low is utilized, and the humidity is uncontrollable; the method for realizing the moisture preservation area generally comprises the steps of completely sealing the independent area, enabling no wind to circulate and preserving the moisture of food in the moisture preservation area, and the moisture preservation realized by the method enables harmful gas emitted by the food to be silted up, is easy to ripen melons and fruits, and breeds mildew and the like. The single-system air-cooled refrigerator has limited humidity control means in the humidity control area, and the current situation in the industry is that the humidity cannot be adjusted or the humidity control cost is too high.

The invention provides an accurate humidifying chamber of an air-cooled refrigerator, which is formed by enclosing a surrounding plate, a drawer and a sealing strip in a refrigerating chamber; the air outlet of the humidifying chamber is communicated with the refrigerating chamber air duct, the air return inlet of the humidifying chamber is communicated with the refrigerating air return duct, and a humidifying device is arranged between the side wall of the refrigerator and the inner wall of the humidifying chamber; meanwhile, after the refrigerator main control board receives the temperature of the humidifying cavity and the humidity of the humidifying cavity transmitted by the temperature and humidity sensor, the switch of the compressor, the air cooler, the refrigeration air channel electric air door and the humidifying cavity electric air door is controlled, the humidity regulation in the humidifying cavity in the refrigerator is realized, the food is stored under the appropriate humidity, and the food storage time is prolonged.

Disclosure of Invention

The invention aims to provide an accurate humidity adjusting chamber of an air-cooled refrigerator, which is enclosed into a humidity adjusting chamber through a coaming, a drawer and a sealing strip in a refrigerating chamber; the air outlet of the humidifying chamber is communicated with the refrigerating chamber air duct, the air return inlet of the humidifying chamber is communicated with the refrigerating air return duct, and a humidifying device is arranged between the side wall of the refrigerator and the inner wall of the humidifying chamber; meanwhile, after the refrigerator main control board receives the temperature of the humidifying cavity and the humidity of the humidifying cavity transmitted by the temperature and humidity sensor, the switch of the compressor, the air cooler, the refrigeration air channel electric air door and the humidifying cavity electric air door is controlled, the humidity regulation in the humidifying cavity in the refrigerator is realized, and the food is stored under the appropriate humidity.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to an accurate humidity regulating chamber of an air-cooled refrigerator, which comprises a refrigerator body, a refrigerating chamber, a freezing chamber, a refrigerating system, an air circulating system, a defrosting system and a humidity regulating device, wherein the refrigerating chamber is arranged in the refrigerator body; 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 freezing 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 duct, a refrigerating chamber air duct and a refrigerating return air duct; one end of the air duct of the freezing chamber is communicated with the upper part of the evaporator cavity, and the other end of the air duct of the refrigerating chamber is communicated with the air duct of the refrigerating chamber; a refrigerating fan is arranged in the air duct of the freezing chamber; a refrigerating air channel electric air door is arranged at the joint of the refrigerating return air channel and the freezing chamber air channel; one end of the refrigerating air return duct is communicated with the refrigerating chamber through a refrigerating chamber air return opening, and the other end of the refrigerating air return duct is communicated with the lower part of the evaporator cavity;

the defrosting system comprises a defrosting heater, a water pan and a drain pipe; the defrosting heater is arranged at the bottom in the cavity of the evaporator; one end of the drain pipe is communicated with the bottom of the hair styling cavity, and the other end of the drain pipe is connected to a water pan at the bottom of the refrigerator body; a humidity adjusting chamber is arranged in the refrigerating chamber;

the humidifying chamber is a chamber surrounded by a coaming, a drawer and a sealing strip; the coaming is fixed on the inner side wall of the refrigerating chamber and the bottom surface of the refrigerating chamber to form a drawer box; the drawer is slidably arranged in the drawer box; the drawer and the drawer box are sealed through a sealing strip;

the back of the inner side of the humidifying chamber is respectively provided with a humidifying chamber air outlet and a humidifying chamber air return inlet; the air outlet of the humidifying chamber is communicated with the air duct of the refrigerating chamber; the air return port of the humidifying chamber is communicated with the refrigerating air return channel; a humidifying chamber electric air door for controlling the opening and closing of a humidifying chamber air return port is arranged in the refrigerating chamber air duct; a temperature and humidity sensor is also installed on the back of the inner side of the humidity adjusting chamber;

the humidity adjusting device is arranged between the side wall of the refrigerator and the inner wall of the humidity adjusting chamber; the humidifying device comprises a connecting pipe, a one-way floating ball valve cavity and a fresh air fan; a vent cover is arranged at one end of the connecting pipe, which extends out of the side wall of the refrigerator; the other end of the connecting pipe is communicated with the bottom end of the cavity of the vertically placed one-way floating ball valve; a floating ball is placed in the cavity of the one-way ball valve; one side of the one-way ball float valve cavity is communicated with the fan protection cover; the fan protection cover is fixed on the inner wall of the humidifying chamber and communicated with the debugging chamber; the diameter of the floating ball is larger than the diameter of the inlet of the one-way ball float cavity and smaller than the diameter of the cavity of the one-way ball float cavity;

a main control board of the refrigerator is mounted on the back outside the refrigerator body; an evaporator temperature sensor is arranged on the evaporator; the refrigerator main control board is used for receiving the temperature of the humidifying cavity, the humidity of the humidifying cavity and the temperature of the evaporator, which are monitored by the temperature and humidity sensor, and the temperature of the evaporator, which is transmitted by the temperature sensor of the evaporator; the refrigerator main control board is also used for controlling the switch of the compressor, the air cooler, the refrigeration air channel electric air door and the humidifying chamber electric air door.

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 inner wall of the humidity adjusting chamber is also provided with an adsorbent protection cover provided with a plurality of through holes; the adsorbent protection cover corresponds to the fan protection cover in position; and a porous adsorbent is fixed on the inner side of the adsorbent protection cover.

Preferably, an annular fan cover sealing ring is installed on the inner side wall of the fan protection cover.

Preferably, a movable sealing cover is arranged at the top of the one-way ball float valve cavity; and a reticular baffle is arranged at the communication position of the one-way ball float valve cavity and the fan protection cover.

Preferably, the humidity control device is arranged at the upper part of the refrigerating chamber; the fresh air fan, the one-way ball float valve cavity and the connecting pipe are distributed from top to bottom.

A control method for an accurate humidity adjusting chamber of an air-cooled refrigerator comprises the following steps:

when any compartment of the air-cooled refrigerator requests refrigeration from a main control board of the refrigerator;

s00: the refrigerator main control board judges whether the temperature of the humidity adjusting chamber is greater than a refrigerating starting point Ton or not; if yes, go to S01; if not, keeping the current state;

s01: the refrigerator main control board controls the refrigeration air channel electric air door, the refrigeration fan, the humidifying chamber electric air door and the compressor to be opened to refrigerate the humidifying chamber; meanwhile, the temperature and humidity sensor transmits the monitored temperature of the humidifying chamber to a main control board of the refrigerator every 30 seconds;

s02: the refrigerator main control board judges whether the temperature of the humidity adjusting chamber is less than a refrigerating shutdown point Toff or not; if so, recording the total refrigerating time Son of the humidity adjusting chamber and executing S03; if not, keeping the current state;

s03: the refrigerator main control board closes the refrigeration air channel electric air door and the humidifying chamber electric air door, turns to the freezing chamber for refrigeration, and opens the fresh air fan to humidify the humidifying chamber;

s04: the refrigerator main control board judges whether the humidity of the current humidity adjusting chamber reaches a preset humidity threshold value H; if yes, the main control board of the refrigerator controls to close the fresh air fan, records the shutdown humidifying time Soff and executes S05; if not, keeping the current state;

s05: the refrigerator main control board calculates the average humidity Hav in the processes of refrigerating the humidifying chamber and stopping humidifying and calculates the difference value delta H between the average humidity Hav and a preset humidity threshold value H;

s06: the refrigerator main control board judges that delta H is 0; if so, the Soff is kept unchanged; if not, executing S07;

s07: the refrigerator main control board judges that delta H is greater than 0; if so, Soff is Soff-n and S00 is executed; if not, Soff is equal to Soff + n and S00 is executed;

where n is the humidification time per increment of shutdown.

Preferably, the average humidity Hav in S05 is calculated as follows: hav ═ Σ

(Hoff+H30s+H60s……HON)/(Son+Soff)；

Wherein Hoff is the humidity value in the humidity regulating cavity when the fresh air fan is closed; the HON is the humidity value in the humidity regulating cavity when the refrigeration air channel electric air door and the humidity regulating cavity electric air door are opened; h30s is the humidity value in the humidity adjusting chamber after the electric air door of the refrigeration air duct is opened for 30 s; h60s is the humidity value in the humidity adjusting chamber after the distance from the electric air door of the refrigeration air duct is opened for 60 s.

One aspect of the present invention has the following advantageous effects:

1. a humidifying chamber is enclosed by a coaming, a drawer and a sealing strip in a refrigerating chamber; the air outlet of the humidifying chamber is communicated with the refrigerating chamber air duct, the air return inlet of the humidifying chamber is communicated with the refrigerating air return duct, and a humidifying device is arranged between the side wall of the refrigerator and the inner wall of the humidifying chamber; meanwhile, after the refrigerator main control board receives the temperature of the humidifying cavity and the humidity of the humidifying cavity transmitted by the temperature and humidity sensor, the refrigerator main control board controls the compressor, the air cooler, the refrigeration air channel electric air door and the switch of the humidifying cavity electric air door to realize the humidity regulation in the humidifying cavity in the refrigerator, realize the storage of food under proper humidity, prolong the storage time of the food and be suitable for the refrigeration storage of different foods;

2. the main control board of the refrigerator calculates the average humidity Hav in the processes of refrigerating the humidifying chamber and humidifying during shutdown, 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 washing; the no-load average humidity of the humidity adjusting chamber is controlled within the range of 30-90%, and the adjusting precision reaches 1%; the humidity of the humidity-adjusting chamber of the air-cooled refrigerator can meet the storage requirements of various food materials, and the air-cooled refrigerator can be used for storing dry goods and tea (the relative humidity is below 45%), and also can be used for storing cosmetics, medicines (the relative humidity is about 50%) and fruits and vegetables (the relative humidity is above 80%); large adjusting range, low cost and high precision.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a side sectional view of an air-cooled refrigerator with a precise humidity conditioning chamber closed;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is a front view of an air-cooled refrigerator with a precise humidity conditioning chamber opening door according to the present invention;

FIG. 4 is an enlarged view of B in FIG. 3;

FIG. 5 is a chart of absolute humidity versus relative humidity;

FIG. 6 is a flow chart of a method for controlling a precise humidity conditioning chamber of an air-cooled refrigerator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open," "upper," "middle," "length," "inner," and the like are used in an orientation or positional relationship for convenience in describing the present invention and for simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Referring to fig. 1-4, the present invention relates to a precise humidity-adjusting chamber of an air-cooled refrigerator, which comprises a refrigerator body, a refrigerating chamber 1, a freezing chamber 2, an air circulation system, a defrosting system and a humidity-adjusting device; the refrigeration system comprises a compressor 31, an evaporator 32, a capillary tube, a filter and a condenser; the compressor 31 is installed in a compressor chamber below the freezing chamber 2; the evaporator 32 is communicated with the compressor 31 and the evaporator 32 is installed in an evaporator chamber at the rear side of the freezing chamber 2; when in specific use: the refrigerator main control board 6 controls to turn on the compressor 31 and the refrigerating fan 22 to blow cold air into the freezing chamber 2 for refrigeration; meanwhile, the main control board of the refrigerator controls the cold air blowing and refrigerating in the refrigerating chamber through controlling the electric air door 13; because the evaporator 32 is at a low temperature below-18 ℃ for a long time and the temperature is far lower than the dew point temperature of the refrigerating chamber, 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 water vapor in the cold air is condensed on the evaporator 32 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; a refrigerating air duct 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 duct 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 pan 35 and a drain pipe 34; the defrosting heater 33 is arranged at the bottom in the cavity of the evaporator; one end of the drain pipe 34 is communicated with the bottom of the hair chamber, and the other end is connected to a water pan 35 at the bottom of the refrigerator body; when in specific use: the refrigerator main control panel 6 controls the defrosting heater 33 to start, the evaporator 32 is defrosted after the temperature is raised, defrosted water is discharged out of a water receiving tray 35 outside the refrigerator through a drain pipe 34, and a high-temperature drain pipe is arranged in the water receiving tray 35 and used for evaporating defrosted water;

a humidity adjusting chamber is arranged in the refrigerating chamber 1; the humidifying chamber is a chamber surrounded by a coaming 51, a drawer 52 and a sealing strip; the coaming 51 is fixed on the inner side wall of the refrigerating chamber 1 and the bottom surface of the refrigerating chamber 1 to form a drawer box; drawer 52 is slidably mounted within the drawer housing; the drawer 52 and the drawer box are sealed through a sealing strip;

the back of the inner side of the humidifying chamber is respectively provided with a humidifying chamber air outlet 53 and a humidifying chamber air return inlet 54; the air outlet 53 of the humidifying chamber is communicated with the refrigerating chamber air duct 11; the air return port 54 of the humidifying chamber is communicated with the refrigerating air return duct 12; a humidifying chamber electric air door 55 for controlling the opening and closing of a humidifying chamber air return port 54 is arranged in the refrigerating chamber air duct 11; a temperature and humidity sensor 56 is also arranged on the back of the inner side of the humidifying cavity;

the humidity control device is arranged between the refrigerator side wall 5a and the humidity control chamber inner wall 5 b; the humidity adjusting device comprises a connecting pipe 41, a one-way ball float valve cavity 42 and a fresh air fan 43; a vent cover 411 is arranged at one end of the connecting pipe 41 extending out of the side wall 5a of the refrigerator; the other end of the connecting pipe 41 is communicated with the bottom end of a vertically placed one-way ball float valve cavity 42; a floating ball 44 is arranged in the one-way floating ball valve cavity 42; one side of the one-way ball float valve cavity 42 is communicated with a fan protection cover 431; the fan protection cover 431 is fixed on the inner wall 5b of the humidifying chamber and is communicated with the debugging chamber; the diameter of the floating ball 44 is larger than the diameter of the inlet of the one-way ball valve cavity 42 and smaller than the diameter of the cavity of the one-way ball valve cavity 42;

when in specific use: the refrigerator main control board 6 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 humidity adjusting chamber; the floating ball 44 in the one-way ball float valve cavity 42 is lifted, and external high-humidity air enters the humidity adjusting cavity to realize rapid humidification; after the refrigeration system and the air circulation system are started for a period of time, the air pressure in the humidifying chamber is smaller than the external air pressure, and when the floating ball 44 is lifted enough, the external high-humidity air enters the humidifying chamber, so that rapid humidification is realized;

from the thermodynamic perspective, the temperature and the absolute humidity determine the relative humidity of the space; wherein, the absolute humidity refers to the amount of water vapor contained in the gas; relative humidity refers to the ratio of absolute humidity to the water vapor content of the saturated state of the temperature expressed as a percentage. When the humidifying chamber of the common air-cooled single-system refrigerator refrigerates, most of the absolute humidity is brought to the low-temperature evaporator 32 through air circulation to be condensed; after refrigeration is stopped, the relative humidity rises slowly and the highest point is low, resulting in too low average relative humidity.

As can be seen from the air conditioning theory, the absolute humidity contained in the same relative humidity varies at different temperatures. The higher the temperature, the greater the absolute humidity in the air; the table in fig. 5 shows that the humidification of the refrigerating chamber can be realized by only supplementing a few grams of absolute humidity into the refrigerating chamber 1;

assume 1m at 5 deg.C³In the environment, if the relative humidity is 70%, only 5.09g of water vapor is added into the space. In a natural state of the air-cooled refrigerator, enough water vapor cannot be supplemented into the humidity adjusting cavity through gaps such as a door seal and a rotating beam. Aiming at the problem, the invention utilizes a forced convection method to introduce air with high external moisture content into the humidity adjusting chamber and complete moisture supplement in a short time, so that the average value of the relative humidity in the single-system air-cooled refrigerator is increased from 20 percent to 70 percent, the level of the double-system refrigerator is reached, and the fruit and vegetable fresh-keeping effect is greatly improved;

a main control board 6 of the refrigerator is arranged on the back outside the refrigerator body; an evaporator temperature sensor 321 is mounted on the evaporator 32; the refrigerator main control board 6 is configured to receive the humidity conditioning chamber temperature and the humidity conditioning chamber humidity monitored by the temperature and humidity sensor 56 and the evaporator temperature transmitted by the evaporator temperature sensor 321; the refrigerator main control board 6 is also used for controlling the opening and closing of the compressor 31, the air cooler 22, the refrigeration air channel electric air door 13 and the humidifying cavity electric air door 55; during specific use, after the refrigerator main control board 6 receives the humidity-adjusting chamber temperature and humidity-adjusting chamber humidity transmitted by the temperature and humidity sensor 56, the switches of the compressor 31, the air cooler 22, the refrigeration air duct electric air door 13 and the humidity-adjusting chamber electric air door 55 are controlled, so that humidity adjustment in the humidity-adjusting chamber inside the refrigerator is realized, food is stored at proper humidity, the food storage time is prolonged, and the refrigerator is suitable for cold storage of different foods.

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 inner wall 5b of the humidifying chamber is also provided with an adsorbent protection cover 45 provided with a plurality of through holes; adsorbent agent

The protecting cover 45 corresponds to the fan protecting cover 431 in position; the porous adsorbent 451 is fixed inside the adsorbent protection cover 45; can adsorb small-particle dust and dust oil smoke peculiar smell in the air, and ensure that the fresh air sent into the refrigerating chamber is clean and has no peculiar smell.

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; the damping device is used for sealing, damping and reducing noise.

Wherein, the top of the one-way ball float valve cavity 42 is provided with a movable sealing cover 421; a reticular baffle 422 is arranged at the communication position of the one-way ball float valve cavity 42 and the fan protection cover 431; preventing the float 44 from entering the blower guard 431.

Wherein, the humidity control device is arranged at the upper part of the refrigerating chamber 1; the fresh air fan 43, the one-way ball float valve cavity 42 and the connecting pipe 41 are distributed from top to bottom.

Referring to fig. 6, a method for controlling a precise humidity conditioning chamber of an air-cooled refrigerator includes the following steps:

when any compartment of the air-cooled refrigerator requests refrigeration from the main control panel 6 of the refrigerator;

s00: the refrigerator main control board 6 judges whether the temperature of the humidity adjusting chamber is greater than a refrigerating starting point Ton or not; if yes, go to S01; if not, keeping the current state; here, the temperature in the evaporator chamber rises due to the stop 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 and the humidity control chamber are cooled first, and the humidity in the refrigerating chamber 1 and the humidity control chamber drops relatively slowly;

s01: the refrigerator main control board 6 controls the refrigeration air channel electric air door 13, the refrigeration fan 22, the humidifying chamber electric air door 55 and the compressor 31 to be opened to refrigerate the humidifying chamber; meanwhile, the temperature and humidity sensor 56 transmits the monitored temperature of the humidity adjusting chamber to the main control panel 6 of the refrigerator every 30 seconds; in the refrigeration process of the humidity adjusting chamber, the air pressure in the humidity adjusting chamber is greater than the external atmospheric pressure of the refrigerator due to the fact that the refrigeration fan 22 continuously blows cold air into the humidity adjusting chamber; therefore, the floating ball 44 is in a natural falling state, and blocks the inlet of the one-way ball valve cavity to prevent cold air from leaking;

s02: the refrigerator main control board 6 judges whether the temperature of the humidity adjusting chamber is less than a refrigerating shutdown point Toff; if so, recording the total refrigerating time Son of the humidity adjusting chamber and executing S03; if not, keeping the current state; here, the refrigeration stop point Toff is smaller than the refrigeration start-up point Ton, and the refrigeration stop point Toff and the refrigeration start-up point Ton are temperature intervals maintained by the humidity conditioning chamber;

s03: the refrigerator main control board 6 closes the refrigeration air channel electric air door 13 and the humidifying chamber electric air door 55, turns to the freezing chamber 2 for refrigeration, and opens the fresh air fan 43 to humidify the humidifying chamber; in the process, as the freezing chamber 2 is refrigerated, the air in the humidity adjusting chamber returns to the evaporator cavity through the refrigerating return air duct 12, the air pressure in the humidity adjusting chamber 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 ball float valve cavity 42 to humidify the refrigerating chamber 1; meanwhile, the fresh air fan 43 is turned on, so that the humidification efficiency is improved, the humidity in the humidity adjusting chamber is improved in a short time, and the influence on the refrigeration effect due to the excessive refrigeration capacity leaked in a long time is avoided; in addition, the floating ball 44 can be kept in a lifted state continuously under the action of the fresh air fan 43; in fact, when the fresh air fan 43 is simply turned on, and the fresh air fan 43 blows air in the one-way ball valve cavity 42 into the humidity control chamber, the air pressure in the one-way ball valve cavity 42 is reduced, and the floating ball 44 can be lifted;

s04: the refrigerator main control board 6 judges whether the humidity of the current humidity adjusting chamber reaches a preset humidity threshold value H; if yes, the main control board 6 of the refrigerator controls to close the fresh air fan 43, records the shutdown humidifying time Soff and executes S05; if not, keeping the current state; specifically, when the fresh air fan 43 stops, the air pressure in the humidity adjusting chamber is greater than the external atmospheric pressure of the refrigerator, and the floating ball 44 is in a natural falling state to block the inlet of the one-way ball valve cavity to prevent cold air from leaking;

s05: the refrigerator main control board 6 calculates the average humidity Hav in the processes of refrigerating the humidifying chamber and stopping humidifying and calculates the difference value delta H between the average humidity Hav and a preset humidity threshold value H;

s06: the refrigerator main control board 6 judges that delta H is 0; if so, the Soff is kept unchanged; if not, executing S07;

s07: the refrigerator main control board 6 judges that delta H is greater than 0; if so, Soff is Soff-n and S00 is executed; if not, Soff is equal to Soff + n and S00 is executed;

where n is the humidification time per increment of shutdown.

Wherein, 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 humidity adjusting chamber when the fresh air fan 43 is turned off; HON is the humidity value in the humidity regulating cavity when the refrigeration air channel electric air door 13 and the humidity regulating cavity electric air door 55 are opened; h30s is the humidity value in the humidity adjusting chamber after the electric air door 13 of the refrigeration air duct is opened for 30 s; h60s is the humidity value in the humidity conditioning chamber after the distance between the electric damper 13 of the refrigerating duct is opened for 60 s.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments 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 utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An accurate humidity regulating chamber of an air-cooled refrigerator comprises a refrigerator body, a refrigerating chamber (1), a freezing chamber (2), a refrigerating system, an air circulating system, a defrosting system and a humidity regulating 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 freezing chamber (2); 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); a refrigerating air channel electric air door (13) is arranged at the joint of the refrigerating return air channel (12) and the freezing chamber air channel (21); one end of the refrigerating air return duct (12) is communicated with the refrigerating chamber (1) through a refrigerating chamber air return opening, and the other end of the refrigerating air return duct is communicated with the lower part of the evaporator cavity;

the defrosting system comprises a defrosting heater (33), a water receiving tray (35) and a drain pipe (34); the defrosting heater (33) is arranged at the bottom in the cavity of the evaporator; one end of the drain pipe (34) is communicated with the bottom of the hair distributor cavity, and the other end of the drain pipe is connected to a water pan (35) at the bottom of the refrigerator body; the method is characterized in that: a humidity adjusting chamber is arranged in the refrigerating chamber (1);

the humidifying chamber is a chamber enclosed by a coaming (51), a drawer (52) and a sealing strip; the coaming (51) is fixed on the inner side wall of the refrigerating chamber (1) and the bottom surface of the refrigerating chamber (1) to form a drawer box; the drawer (52) is slidably mounted in the drawer box; the drawer (52) and the drawer box are sealed through a sealing strip;

the back of the inner side of the humidifying chamber is respectively provided with a humidifying chamber air outlet (53) and a humidifying chamber air return inlet (54); the air outlet (53) of the humidifying chamber is communicated with the refrigerating chamber air duct (11); the air return port (54) of the humidifying chamber is communicated with the refrigerating air return duct (12); a humidifying chamber electric air door (55) for controlling the opening and closing of a humidifying chamber air return opening (54) is arranged in the refrigerating chamber air duct (11); a temperature and humidity sensor (56) is also arranged on the back of the inner side of the humidifying chamber;

the humidity control device is arranged between the side wall (5a) of the refrigerator and the inner wall (5b) of the humidity control chamber; the humidity adjusting 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 side wall (5a) of the refrigerator 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 ball float 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 protective cover (431); the fan protective cover (431) is fixed on the inner wall (5b) of the humidifying chamber and is communicated with the humidifying chamber; the diameter of the floating ball (44) is larger than the diameter of the inlet of the one-way ball valve cavity (42) and is smaller than the diameter of the cavity of the one-way ball valve cavity (42);

a main control board (6) of the refrigerator is mounted on the back outside the refrigerator body; an evaporator temperature sensor (321) is arranged on the evaporator (32); the refrigerator main control board (6) is used for receiving the humidity adjusting chamber temperature and humidity adjusting chamber humidity monitored by the temperature and humidity sensor (56) and the evaporator temperature transmitted by the evaporator temperature sensor (321); the refrigerator main control board (6) is also used for controlling the opening and closing of the compressor (31), the air cooler (22), the refrigeration air channel electric air door (13) and the humidifying cavity electric air door (55).

2. The accurate humidity adjusting chamber of the air-cooled refrigerator as claimed in 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 accurate humidity regulating chamber of the air-cooled refrigerator as claimed in claim 1, wherein the inner wall (5b) of the humidity regulating chamber is further provided with an adsorbent protective cover (45) provided with a plurality of through holes; the adsorbent protection cover (45) corresponds to the fan protection cover (431) in position; the inner side of the adsorbent protection cover (45) is fixed with a porous adsorbent (451).

4. The precise humidity conditioning chamber of an air-cooled refrigerator according to claim 1, wherein the inner side wall of the blower protection cover (431) is provided with an annular air cover sealing ring (432).

5. The accurate humidity adjusting chamber of the air-cooled refrigerator as claimed in claim 1, wherein a movable sealing cover (421) is installed on the top of the one-way ball valve cavity (42); and a reticular baffle plate (422) is arranged at the communication position of the one-way floating ball valve cavity (42) and the fan protection cover (431).

6. The accurate humidity conditioning chamber of the air-cooled refrigerator as claimed in claim 1, wherein the humidity conditioning device is arranged at the upper part of the refrigerating chamber (1); the fresh air fan (43), the one-way ball float valve cavity (42) and the connecting pipe (41) are distributed from top to bottom.