CN113669996A - Preservation drawer, refrigerator with preservation drawer and temperature and humidity control method - Google Patents

Preservation drawer, refrigerator with preservation drawer and temperature and humidity control method Download PDF

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Publication number
CN113669996A
CN113669996A CN202111082735.XA CN202111082735A CN113669996A CN 113669996 A CN113669996 A CN 113669996A CN 202111082735 A CN202111082735 A CN 202111082735A CN 113669996 A CN113669996 A CN 113669996A
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CN
China
Prior art keywords
drawer
air
air duct
temperature
humidity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111082735.XA
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Chinese (zh)
Inventor
刘畅
朱雪峰
陈佳弘
程星光
焦雯姝
赵燕清
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202111082735.XA priority Critical patent/CN113669996A/en
Publication of CN113669996A publication Critical patent/CN113669996A/en
Pending legal-status Critical Current

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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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/02—Charging, supporting, and discharging the articles to be cooled by shelves
    • F25D25/024—Slidable shelves
    • F25D25/025—Drawers
    • 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
    • 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
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • 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
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • 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
    • F25D2317/06—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 with forced air circulation
    • F25D2317/067—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 with forced air circulation characterised by air ducts
    • 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
    • F25D2317/06—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 with forced air circulation
    • F25D2317/068—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 with forced air circulation characterised by the fans
    • 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
    • F25D2600/02—Timing
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)

Abstract

The invention discloses a preservation drawer, a refrigerator with the preservation drawer and a temperature and humidity control method. The fresh-keeping drawer comprises a drawer door, a drawer body, a cavity for accommodating the drawer body, and a drawer air duct device arranged on the cavity, wherein a condensation-preventing air duct and a cooling air duct communicated with cold air are arranged in the drawer air duct device. Prevent that condensation wind channel is through the moisture-permeable membrane subassembly that sets up at cavity top and with the inside intercommunication of cavity, prevent that condensation wind channel and cooling duct are provided with wind door gear respectively. Through two cold air channels and the air door device, dehumidification condensation prevention, accelerated cooling and air curtain formation can be respectively realized. The excessive water vapor in the drawer can be discharged through the moisture permeable film to avoid condensation; and the heat exchange efficiency and the accurate temperature and humidity control can be improved. When the drawer is opened, an air curtain can be formed above the drawer body to separate the gas convection between the interior of the drawer and the external environment, so that the temperature and humidity fluctuation in the interior of the drawer is reduced, and the aim of keeping fresh is fulfilled.

Description

Preservation drawer, refrigerator with preservation drawer and temperature and humidity control method
Technical Field
The invention relates to a refrigerating device, in particular to a fresh-keeping drawer, a refrigerator with the fresh-keeping drawer and a temperature and humidity control method of the fresh-keeping drawer.
Background
The fruit and vegetable drawer is an important component of a refrigerating chamber of the refrigerator and is also a main area of the refrigerator for exerting the fruit and vegetable fresh-keeping function. Different from meat food, plant type fresh food materials such as fruits and vegetables are still 'living' in the storage period after picking, and the cell tissues of the plant type fresh food materials also continuously carry out various metabolic reactions such as respiration, transpiration and the like. Respiration and oxidation will promote the aging of plant body, and this will lead to the ripening, aging and decay of fruits and vegetables and the continuous consumption of various nutrients. In addition, since the average Humidity in the air-cooled refrigerator is generally 40-70% RH (Relative Humidity), it is easy to air-dry, lose water and wither the fruits and vegetables without packaging, especially the leaf vegetables. The appearance, taste and nutritional ingredients of the fruits and vegetables are reduced, and the shelf life is greatly shortened.
Therefore, in order to improve the fresh-keeping effect of the fruit and vegetable drawer on fruits and vegetables, the fruit and vegetable drawer generally adopts a relatively closed structure, an air inlet is not arranged, an indirect cooling refrigeration mode is adopted, and the moisture loss of fruits and vegetables is inhibited to achieve the moisture-keeping effect. However, when a large amount of fruits and vegetables are stored in the fruit and vegetable drawer, a large amount of water vapor is generated by transpiration, and condensation is easily generated at a low temperature inside the refrigerator. The accumulated condensation is easy to breed microbes such as bacteria and mould, and fruits and vegetables can be soaked and rotten, which is not favorable for the preservation of the fruits and vegetables. Therefore, when the water vapor in the fruit and vegetable drawer is excessive, the excessive water vapor needs to be discharged in time so as to ensure that the drawer is always at a proper humidity (such as 90-95% RH).
In addition, the existing fruit and vegetable drawer with a closed structure only can depend on an indirect cooling refrigeration mode of heat transfer between the drawer cavity and the outer wall material and the refrigerating chamber, so that the cooling speed is low, and the heat exchange efficiency is low. The fruit and vegetable drawers mostly adopt fuzzy temperature control, and the on-off of a refrigerating system is controlled only by a refrigerating chamber temperature sensor, so that the actual temperature inside the fruit and vegetable drawer has larger deviation from the set temperature. When a user opens the drawer to store and take fruits and vegetables, the inside of the drawer is in direct convection with the external environment, so that the temperature and humidity in the drawer are severely fluctuated, and the fresh-keeping effect of storing the fruits and vegetables is influenced.
Therefore, how to overcome the defects that the humidity in the existing refrigerator is not suitable, the heat exchange efficiency is low, the temperature control is not accurate, and the temperature and humidity fluctuate violently sometimes is a problem to be solved in the industry urgently.
Disclosure of Invention
The invention aims to solve the problem that the temperature and the humidity in the drawer of the existing refrigerator are not suitable, and provides a fresh-keeping drawer which can keep the humidity in the refrigerator to be suitable, has high heat exchange efficiency and accurate temperature control and is difficult to cause severe fluctuation of the temperature and the humidity, a refrigerator with the drawer and a temperature and humidity control method of the fresh-keeping drawer.
The invention provides a fresh-keeping drawer which comprises a drawer door, a drawer body, a cavity for accommodating the drawer body, a drawer air duct device arranged on the cavity, an anti-condensation air duct and a cooling air duct which are communicated with cold air, wherein a moisture permeable membrane component communicated with the cavity is arranged on the anti-condensation air duct, and the fresh-keeping drawer also comprises an air door device for controlling the circulation path of the cold air.
Preferably, the cavity orientation the top edge of the one end of drawer door is equipped with the air curtain air outlet, drawer air duct device's one end be equipped with the air curtain air-out groove of air curtain air outlet butt joint, this air curtain air-out groove with cooling duct intercommunication to form the air curtain wind channel, when fresh-keeping drawer closed, the drawer door seal the air curtain air outlet.
Preferably, the air door device comprises a first air door for sealing the air outlet of the condensation-preventing air duct, a second air door for sealing the air outlet of the cooling air duct, and a motor for driving the first air door and the second air door to open and close.
Preferably, the drawer air duct device is internally provided with a U-shaped partition plate which partitions the interior of the drawer air duct device into the anti-condensation air duct and the cooling air duct, so that the drawer air duct air inlet and the drawer air duct air outlet of the drawer air duct device are positioned at one end of the drawer air duct device.
Preferably, the moisture permeable membrane assembly comprises a moisture permeable membrane mounting frame, a moisture permeable membrane and a moisture permeable membrane mounting cover which are sequentially stacked, and the moisture permeable membrane mounting frame is connected with the cavity wall body.
Preferably, the air door device is arranged at the air outlet of the drawer air duct or at the air return opening of the refrigerator air duct.
Preferably, the tail of the drawer body is provided with a magnet, and the position of the tail of the cavity, which corresponds to the magnet, is provided with a reed pipe.
Preferably, a temperature and humidity sensor for monitoring the internal state of the drawer body is arranged in the cavity.
Preferably, the inner side of the drawer door is provided with a sealing ring attached to the end face of the cavity.
Preferably, the drawer air duct device is internally provided with an independently controlled fan.
The invention provides a temperature and humidity control method of a preservation drawer, which comprises the steps of monitoring the opening and closing state of the preservation drawer and the temperature and humidity in the preservation drawer in real time, and controlling the opening or closing of a first air door and/or a second air door according to the opening and closing state of the preservation drawer and the comparison result of the detected temperature and humidity value and a set value.
Preferably, the temperature and humidity control method comprises the following steps:
when the fresh-keeping drawer is closed, if the humidity in the drawer body is equal to or greater than a preset upper limit value of the humidity, the first air door is controlled to be opened, and cold air is input into the drawer air channel device; if the humidity in the drawer body is equal to or less than a preset lower limit value of the humidity, controlling the first air door to be closed; if the temperature in the drawer body is equal to or greater than a preset upper limit value of the temperature, the second air door is controlled to be opened, and cold air is input into the drawer air channel device; if the temperature in the drawer body is equal to or less than a preset lower limit value of the temperature, controlling the second air door to be closed;
when the fresh-keeping drawer is opened, the air door device is controlled to be closed, and cold air is input into the drawer air channel device; when the opening time of the fresh-keeping drawer is equal to or more than the preset time value, the air supply of the drawer air duct device is stopped.
Preferably, the preset Humidity upper limit value H0 is 95% RH (Relative Humidity), and the preset Humidity lower limit value H1 is 85% RH; the preset upper limit value T0 of the temperature is 4 ℃, and the preset lower limit value T1 of the temperature is 2 ℃; the preset time length S0 is 5 min.
The invention also provides a refrigerator which comprises the fresh-keeping drawer and the temperature and humidity control method thereof.
According to the invention, the drawer air duct device is arranged on the fresh-keeping drawer, the interior of the drawer air duct device is divided into the condensation-preventing air duct and the cooling air duct through the U-shaped partition plate, three different air supply paths can be realized through the air door arranged at the air outlet of the drawer air duct, and dehumidification, condensation prevention, accelerated cooling and air curtain formation are respectively realized. When the amplified fruits and vegetables are stored in the drawer and condensation is about to occur due to overhigh internal relative humidity, redundant water vapor in the drawer is discharged through the moisture permeable membrane and the condensation preventing air duct arranged at the top of the cavity so as to avoid condensation. Through the temperature and humidity sensor arranged inside the drawer and the cooling air duct arranged at the top of the cavity, the heat exchange area is enlarged by being close to the drawer, so that the purposes of improving the heat exchange efficiency inside the drawer and accurately controlling the temperature and humidity in the drawer are achieved. The drawer door, the cavity and the sealing ring can form a closed structure, when fruits and vegetables are stored in the drawer body and the drawer body is in a closed state, the inside of the drawer can maintain a high relative humidity level, the condition that the fruits and vegetables are dehydrated, air-dried and wilted can be inhibited, and the purpose of moisturizing is achieved. When the drawer is opened by a user, the air curtain air outlet at the upper edge of the cavity is opened, cold air is sent out through the air curtain air channel, and an air curtain is formed above the drawer body to separate the gas convection between the inside of the drawer and the external environment, so that the temperature and humidity fluctuation inside the drawer is reduced, and the fresh-keeping effect on fruits and vegetables is improved.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of a crisper drawer of the present invention;
FIG. 2 is an exploded view of the rear projection of FIG. 1;
FIG. 3 is an exploded view of the front projection of FIG. 1;
FIG. 4 is a cross-sectional view of FIG. 1;
FIG. 5 is a perspective view of the top plate of the FIG. 1 drawer air duct assembly;
fig. 6 is a schematic control flow diagram of an embodiment of a temperature and humidity control method for a fresh-keeping drawer according to the present invention.
In the figure: 1-a drawer body; 2-a cavity; 21-air curtain air outlet; 3-sealing ring; 4-a moisture permeable membrane module; 41-moisture permeable film; 42-moisture permeable film mounting frame; 43-moisture permeable film mounting cover; 5-drawer air duct device; 51-drawer air duct air inlet; 52-drawer air duct air outlet; 53-air curtain air outlet groove; 6-air door; 61-a first damper; 62-a second damper; 7-a motor; 8-a temperature and humidity sensor; 9-reed pipe; 10-a magnet; 11-a screw; 12-anti-condensation path; 13-cooling path; 14-air curtain path; 15-U-shaped partition plates; an anti-condensation air duct 16; a cooling air duct 17 and a drawer door 18.
Detailed Description
As shown in fig. 1, 2 and 3, the fresh keeping drawer, which is a fruit and vegetable drawer used in a refrigerator and is an embodiment of the fresh keeping drawer of the present invention, includes a drawer door 18, a drawer body 1, and a cavity 2 for accommodating the drawer body 1. The horizontal push-pull drawer body 1 can enter or exit the cavity 2 so as to store or take out fruits and vegetables. A drawer air duct device 5 is closely attached to the upper part of the cavity 2 of the fresh-keeping drawer through a screw 11. Referring to fig. 4 and 5, the drawer air duct assembly 5 is provided with an anti-condensation air duct 16 and a cooling air duct 17 communicated with the cool air, and the anti-condensation air duct 16 passes through the moisture permeable membrane assembly 4 communicated with the cavity 2. The drawer air duct 5 is further provided with an air door device for controlling a cold air flow path. In this embodiment, the inner side of the drawer door 18 is provided with a sealing ring 3 which can be attached to the end surface of the cavity 2. Namely, a closed structure is formed by the drawer door 18, the cavity 2 and the sealing ring 3, when fruits and vegetables are stored in the drawer body 1 and the drawer body is in a closed state, the interior of the drawer can maintain a high relative humidity level, the conditions of water loss, air drying and wilting of the fruits and vegetables can be inhibited, and the purpose of moisture preservation is achieved. The moisture permeable membrane module 4 is composed of a hollow moisture permeable membrane mounting frame 42 and a moisture permeable membrane mounting cover 43, and a sheet of moisture permeable membrane 41 is sandwiched between the frame and the cover for moisture permeable membrane, and is used for discharging moisture inside the drawer body 1. The moisture permeable film mounting frame 42 is connected with the top wall of the cavity 2. According to needs, the film-permeable mounting frame 42 can be manufactured integrally with the top wall body of the cavity 2, namely the film-permeable mounting frame 42 is integrated on the cavity 2, so that the number of parts of the freshness preservation drawer assembly can be reduced, and the structure of the freshness preservation drawer is simplified. In this embodiment, a U-shaped partition plate 15 is disposed in the drawer air duct device 5 to partition the interior of the drawer air duct device into a U-shaped anti-condensation air duct 16 and a cooling air duct 17, so that the drawer air duct air inlet 51 and the drawer air duct air outlet 52 of the drawer air duct device are both located at the rear end of the drawer air duct device. The air door device comprises an air door 6, namely a first air door 61 for sealing an air outlet of the condensation preventing air duct 16 and a second air door 62 for sealing an air outlet of the cooling air duct 17; and a motor 7 for driving the first and second dampers to open or close. According to the requirement, the air door device can be directly arranged at the air outlet 52 of the drawer air duct, and can also communicate the air outlet 52 of the drawer air duct with the air return opening of the refrigerator air duct through a pipeline, so that the air door device can be correspondingly arranged at the air return opening of the refrigerator air duct, and the structure of the fresh-keeping drawer can be simplified. The upper edge of the front end of the cavity 2 facing the drawer door 18 is provided with an air curtain air outlet 21, the front end of the drawer air duct device 5 is provided with an air curtain air outlet groove 53 closely butted with the air curtain air outlet 21, and the air curtain air outlet groove 53 is communicated with the cooling air duct 17 in the drawer air duct device 5 to form an air curtain air duct. The drawer door 18 may close the air curtain outlet 21 when the crisper drawer is closed. The inside of the drawer air duct device 5 is divided into two air ducts by the U-shaped division plate 15: an anti-condensation air duct 16 and a cooling air duct 17. Through the switch of the air door 6 that control drawer wind channel air outlet 52 department set up, can realize three kinds of different air supply routes: the condensation preventing path 12, the cooling path 13 and the air curtain path 14 respectively realize dehumidification and condensation prevention, accelerated heat exchange and cooling and form an air curtain for isolating the drawer body 1 from external air flow. The drawer air duct air inlet 51 is connected with a cold air outlet of the refrigerator air duct, and the drawer air duct air outlet 52 is communicated with a refrigerating chamber of the refrigerator or communicated with a return air inlet of the refrigerator air duct through a pipeline. The fan of the refrigerator refrigerating system is used for supplying air, an independent fan is not needed, and the manufacturing cost of the drawer air duct device can be reduced. But under special conditions, independently controlled fans can be arranged in the drawer air duct device, so that accelerated aging of the fans caused by sharing of the refrigeration fans of the refrigerator is avoided, the influence on a refrigeration system of the refrigerator can be avoided, and the modularization level of the fresh-keeping drawer is improved. A magnet 10 is arranged at the tail part of the drawer body 1, and a reed switch 9 is arranged at the position, corresponding to the magnet 10, at the tail part of the cavity 2, so as to monitor whether the drawer body 1 is in a closed state. And a temperature and humidity sensor 8 for monitoring temperature and humidity data inside the drawer body 1 is also arranged in the cavity 2.
In order to accurately control the temperature and the humidity in the drawer body 1, the invention provides a temperature and humidity control method of a fresh-keeping drawer, which comprises the following steps:
the opening and closing state of the fresh-keeping drawer and the temperature and humidity inside the fresh-keeping drawer are monitored in real time, and the first air door and/or the second air door are controlled to be opened or closed according to the opening and closing state of the fresh-keeping drawer and a comparison result of a detected temperature and humidity value and a set value.
The operation steps of the temperature and humidity control method are as follows, please refer to fig. 5 and fig. 6:
after the fresh-keeping drawer is closed, a large amount of fruits and vegetables are stored in the fresh-keeping drawer, a large amount of moisture is accumulated in the drawer due to plant transpiration, when the temperature and Humidity sensor 8 detects that the Humidity in the drawer reaches or is greater than a preset upper limit value H0 of the Humidity, for example, when 95% RH (Relative Humidity) exists, the motor 7 drives the first air door 61 to be opened, cold air in the air outlet channel of the refrigerator is blown in from the air inlet 51 of the air outlet channel of the drawer, flows along the condensation-preventing path 12 through the condensation-preventing air channel 16, flows out from the first air door 61, and returns to the refrigerating chamber of the refrigerator or enters the air return port of the refrigerator. Cold air with lower temperature and humidity blows through the surface of the moisture permeable film 41 to form larger temperature and humidity difference at the inner side and the outer side of the moisture permeable film 41, so that redundant water vapor in the drawer is discharged through the moisture permeable film 41 to avoid condensation inside the drawer. Until the temperature and humidity sensor 8 detects that the humidity in the drawer body 1 reaches or is less than a preset lower limit value H1 of humidity, for example, 85% RH, the first air door 61 is closed, and the cold air in the condensation preventing air duct 16 stops flowing.
When the temperature and humidity sensor 8 detects that the temperature in the drawer reaches or is higher than a preset upper limit value T0, for example, when the temperature is 4 ℃, the motor drives the second air door 62 to open, cold air in the refrigerator air outlet channel is blown in by the drawer air channel air inlet 51, flows through the cooling air channel 17 and along the cooling path 13, flows out of the second air door 62, and returns to the refrigerator refrigerating chamber or enters the refrigerator return air inlet. Cold air flows through the top wall body of the cavity 2, so that the heat exchange area is increased, and the cooling efficiency inside the drawer is improved. When the temperature and humidity sensor 8 detects that the temperature in the drawer body 1 reaches or is less than a preset lower limit value T1, for example, at 2 ℃, the second air door 62 is closed, and the flow of the cold air in the cooling air duct 17 is stopped.
If the temperature and humidity inside the drawer reach or are greater than the preset upper limit values of the temperature and humidity, the first air door 61 and the second air door 62 are opened at the same time, i.e. the dehumidification and cooling operations are performed at the same time.
When the user opens the fresh-keeping drawer, the inside of the drawer directly convects with the external environment, so that the temperature and humidity in the drawer fluctuates dramatically, and the fresh-keeping effect of storing fruits and vegetables is influenced. Therefore, when reed switch 9 detects that refrigerator drawer body 1 is pulled out, install sealing washer 3 on the drawer body and leave cavity 2, then drawer air duct device 5's air curtain air-out groove 53 and cavity 2 top edge's air curtain air outlet 21 are opened, motor 7 drives first air door 61 and second air door 62 and all closes, the cold wind in refrigerator wind channel is insufflated by drawer wind channel air intake 51, blow off and form one "air curtain" in drawer body 1 top along air curtain route 14 level through the air curtain wind channel, the inside and external environment's of separation drawer gas convection, fluctuate with this humiture that reduces the drawer inside, promote the fresh-keeping effect to the fruit vegetables. In order to avoid the phenomenon that the air curtain runs for a long time due to the fact that the drawer is opened for a long time, and a large amount of cold energy is wasted and electric energy is consumed, when the drawer is kept open for time reaching or exceeding the time length preset value S0, for example, when the drawer is kept open for 5min, air supply of the refrigerator air duct stops.
According to the invention, the condensation preventing air duct 16 arranged at the top of the cavity 2 is used for conveying low-humidity cold air to blow across the surface of the moisture permeable film 41, so that a large temperature and humidity difference is formed between the inner side and the outer side of the moisture permeable film 41, and thus, water vapor is driven to be discharged out through the moisture permeable film 41 in an accelerated manner to avoid condensation. Realize under the condition of airtight drawer through cooling path, promote the inside cooling efficiency of drawer, through temperature and humidity's change in temperature and humidity sensor 8 can be accurate control drawer body 1 to do benefit to fresh-keeping. When a user opens the drawer, the air curtain is supplied through the air curtain air duct to form an air curtain above the drawer, the gas convection between the inside of the drawer and the external environment is separated, the temperature and humidity fluctuation inside the drawer is reduced, and the fresh-keeping effect on fruits and vegetables is improved.
The invention also provides a refrigerator which is provided with the fresh-keeping drawer and the temperature and humidity control method thereof.
The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (14)

1. The utility model provides a fresh-keeping drawer, includes drawer door and drawer body, its characterized in that, still including the cavity that holds this drawer body, locate the drawer air duct device on this cavity, be equipped with in this drawer air duct device with condensation air duct, the cooling duct of preventing of air conditioning intercommunication, prevent be equipped with on the condensation air duct with the moisture permeable membrane module of cavity intercommunication still includes the air door device of control air conditioning circulation route.
2. The crisper drawer of claim 1, wherein the chamber has an air curtain outlet at an upper edge thereof facing the end of the drawer door, and wherein the drawer air duct assembly has an air curtain outlet slot at an end thereof abutting the air curtain outlet slot, the air curtain outlet slot being in communication with the cooling air duct and forming an air curtain air duct, the drawer door closing the air curtain outlet when the crisper drawer is closed.
3. The crisper drawer of claim 2, wherein the damper device comprises a first damper closing the air outlet of the condensation-resistant air duct, a second damper closing the air outlet of the cooling air duct, and a motor driving the first and second dampers to open and close.
4. The crisper drawer of claim 1, wherein the moisture permeable membrane module comprises a moisture permeable membrane mounting frame, a moisture permeable membrane and a moisture permeable membrane mounting cover, which are sequentially stacked, wherein the moisture permeable membrane mounting frame is connected with the cavity wall.
5. The crisper drawer according to claim 1, wherein a U-shaped partition plate is provided in the drawer air duct device to partition the interior of the drawer air duct device into the anti-condensation air duct and the cooling air duct, so that the drawer air duct inlet and the drawer air duct outlet of the drawer air duct device are located at one end of the drawer air duct device.
6. The crisper drawer of claim 5, wherein the damper device is located at the drawer air duct outlet or at the refrigerator air duct return.
7. The crisper drawer of claim 1, wherein the drawer body is provided with a magnet at the rear, and a reed pipe is provided at the rear of the cavity at a position corresponding to the magnet.
8. The crisper drawer of claim 1, wherein a temperature and humidity sensor is disposed within the cavity to monitor the internal state of the drawer body.
9. The crisper drawer of claim 1, wherein the inside of the drawer door is provided with a gasket that abuts the end face of the cavity.
10. The crisper drawer of claim 1, wherein an independently controlled fan is provided within the drawer ducting means.
11. The temperature and humidity control method for the preservation drawer according to any one of claims 3 to 10, wherein the on-off state of the preservation drawer and the temperature and humidity inside the preservation drawer are monitored in real time, and the first air door and/or the second air door are controlled to be opened or closed according to the on-off state of the preservation drawer and the comparison result between the detected temperature and humidity values and the set value.
12. The temperature and humidity control method of the crisper drawer according to claim 11, comprising the steps of:
when the fresh-keeping drawer is closed, if the humidity in the drawer body is equal to or greater than a preset upper limit value of the humidity, the first air door is controlled to be opened, and cold air is input into the drawer air channel device; if the humidity in the drawer body is equal to or less than a preset lower limit value of the humidity, controlling the first air door to be closed; if the temperature in the drawer body is equal to or greater than a preset upper limit value of the temperature, the second air door is controlled to be opened, and cold air is input into the drawer air channel device; if the temperature in the drawer body is equal to or less than a preset lower limit value of the temperature, controlling the second air door to be closed;
when the fresh-keeping drawer is opened, the air door device is controlled to be closed, and cold air is input into the drawer air channel device; when the opening time of the fresh-keeping drawer is equal to or more than the preset time value, the drawer air duct device stops supplying air.
13. The temperature and humidity control method of the crisper drawer according to claim 12, wherein the preset upper limit of humidity H0 is 95% RH, and the preset lower limit of humidity H1 is 85% RH; the preset upper limit value T0 of the temperature is 4 ℃, and the preset lower limit value T1 of the temperature is 2 ℃; the preset time length S0 is 5 min.
14. A refrigerator comprising the temperature and humidity control method of the crisper drawer of any of claims 11 to 13.
CN202111082735.XA 2021-09-15 2021-09-15 Preservation drawer, refrigerator with preservation drawer and temperature and humidity control method Pending CN113669996A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111082735.XA CN113669996A (en) 2021-09-15 2021-09-15 Preservation drawer, refrigerator with preservation drawer and temperature and humidity control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111082735.XA CN113669996A (en) 2021-09-15 2021-09-15 Preservation drawer, refrigerator with preservation drawer and temperature and humidity control method

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113531987A (en) * 2020-04-17 2021-10-22 海信（山东）冰箱有限公司 Refrigerator with a door
CN114383369A (en) * 2021-12-14 2022-04-22 青岛海尔电冰箱有限公司 Refrigeration device
CN115143719A (en) * 2022-06-09 2022-10-04 珠海格力电器股份有限公司 Anti-condensation fresh-keeping drawer device, refrigerator and anti-condensation method
WO2024007943A1 (en) * 2022-07-05 2024-01-11 青岛海尔电冰箱有限公司 Magnetic field-based fresh-keeping drawer for refrigerating and freezing device, and refrigerating and freezing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113531987A (en) * 2020-04-17 2021-10-22 海信（山东）冰箱有限公司 Refrigerator with a door
CN113531987B (en) * 2020-04-17 2023-02-03 海信冰箱有限公司 Refrigerator with a door
CN114383369A (en) * 2021-12-14 2022-04-22 青岛海尔电冰箱有限公司 Refrigeration device
CN114383369B (en) * 2021-12-14 2024-06-11 青岛海尔电冰箱有限公司 Refrigerating apparatus
CN115143719A (en) * 2022-06-09 2022-10-04 珠海格力电器股份有限公司 Anti-condensation fresh-keeping drawer device, refrigerator and anti-condensation method
CN115143719B (en) * 2022-06-09 2023-08-18 珠海格力电器股份有限公司 Anti-condensation fresh-keeping drawer device, refrigerator and anti-condensation method
WO2024007943A1 (en) * 2022-07-05 2024-01-11 青岛海尔电冰箱有限公司 Magnetic field-based fresh-keeping drawer for refrigerating and freezing device, and refrigerating and freezing device

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