CN111854269A

CN111854269A - Negative pressure controlled frost-free refrigerator

Info

Publication number: CN111854269A
Application number: CN202010685611.XA
Authority: CN
Inventors: 董春海
Original assignee: 董春海
Current assignee: Huanggang Jinzhi home appliance technology Co.,Ltd.
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2020-10-30
Anticipated expiration: 2040-07-16
Also published as: CN111854269B

Abstract

The invention relates to the technical field of household appliances and discloses a negative pressure controlled frost-free refrigerator which comprises a shell, wherein a closed refrigerating chamber is arranged in the freezing chamber of the shell, and a refrigerator and a frost melting device are assembled in the refrigerating chamber. According to the negative pressure control frostless refrigerator, the pressure difference between the storage chamber and the refrigerating chamber is produced through the fan, and then the starting and stopping of the refrigerator are controlled through the pressure difference, so that the control effect is more efficient and energy-saving, and the service life is relatively long; meanwhile, small circulation of airflow can be formed in the refrigerating chamber in the defrosting process, so that the heat conduction rate of the defrosting device is improved, the defrosting efficiency is improved, and the working time of a single defrosting device is reduced; secondly, because the storeroom has formed the negative pressure, under the effect of pressure differential, increased the pressure of refrigerator door and box, improved sealed effect, better sealed effect can keep the temperature in the refrigerator, the temperature difference when reducing the inner loop alleviates the frosting phenomenon.

Description

Negative pressure controlled frost-free refrigerator

Technical Field

The invention relates to the technical field of household appliances, in particular to a negative pressure controlled frostless refrigerator.

Background

As shown in figure 5, the frostless refrigerator sends the cold air that the cooler was made to each cavity of refrigerator through the wind channel, reaches refrigerated purpose, and at this in-process, cold wind can take away unnecessary moisture in the cavity, consequently can not produce in the refrigerator cavity and freeze the phenomenon, nevertheless, can bring in moisture when cold wind circulates the cooler, consequently can take place the cooler phenomenon of frosting, in order to guarantee the work efficiency of cooler, the cooler bottom has set up the heater strip, regularly starts the defrosting.

In order to avoid overheating, the frostless refrigerator is further provided with a bimetallic strip, when the temperature reaches a set value, the power is automatically cut off, heating and defrosting are stopped, actually, the most common fault of the frostless refrigerator is the fault of the bimetallic strip and a defrosting device, and therefore the control mode of the defrosting device needs to be further optimized, and the fault rate is reduced.

On the other hand, the refrigerator is as the domestic appliance of service life longer, and its sealing strip is ageing, and the inevitable phenomenon when sealing performance reduces, and when the refrigerator is sealed not tight, in the outside air gets into the refrigerator, has increased cold wind endless temperature variation, and the frosting phenomenon when aggravating cold wind contact refrigerator reduces refrigeration efficiency, increases the operating frequency of defroster and bimetallic strip simultaneously, further reduces its life.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the technical scheme of the negative pressure control frostless refrigerator, which has the advantages of flexible control, high defrosting efficiency and the like and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a frostless refrigerator of negative pressure control, includes the casing, the freezer of casing is equipped with confined refrigeration room by lining, refrigeration indoor is equipped with the refrigerator and changes the defroster, the inner wall of casing is equipped with the return air passageway and the air-cooled passageway of each storeroom of intercommunication, be equipped with the choke valve on the air-cooled passageway and make its flow be less than the house steward flow of return air passageway, the return air passageway collects a house steward and has the frost pipe through the house steward intercommunication, be equipped with the fan that makes the air current flow direction refrigeration room on the frost pipe, the flow area of frost pipe reduces gradually along with going on of frosting, be equipped with the pressure differential control piece of response refrigeration room and storeroom pressure differential in the refrigeration room, opening of pressure differential control piece control is stopped, the refrigerator door of casing is equipped with the.

Preferably, the frosting pipe is a wide and flat cylinder, the frosting pipe is made of a good thermal conductor, a reversing channel formed by concave-convex fit gaps is arranged in the frosting pipe, and an inclined plane is arranged on one side of the reversing channel, which is the same as the popular side.

Preferably, the pressure difference control piece is arranged on a header pipe communicated with the frosting pipe, one end of the frosting pipe is communicated with the interior of the frosting pipe, the other end of the frosting pipe is communicated with the interior of the refrigerating chamber, the pressure difference control piece comprises a fixed pipe arranged on the outer wall of the frosting pipe, one end of the fixed pipe is provided with a first electrode and a first magnet, the inner wall of the fixed pipe is movably connected with a plunger, the plunger is provided with a second electrode and a second magnet right opposite to one side of the first electrode, the second magnet and the first magnet are expressed as attraction, the first electrode and the second electrode control the on-off of the refrigerator, and the maximum magnetic force between the first magnet and the second magnet is smaller than the maximum pressure difference.

Preferably, the side wall of the main pipe of the frosting pipe is provided with a small throttling circulation channel, the circulation section of the small circulation channel is smaller than the main pipe section of the return air channel, the small circulation channel and the air cooling channel are both provided with an electric control valve, and the on-off of the first electrode and the second electrode drives the electric control valve on the small circulation channel to be communicated.

Preferably, the negative pressure eliminating part is a switch for controlling the starting and stopping of the fan.

The invention has the following beneficial effects:

1. according to the negative pressure control frostless refrigerator, the pressure difference between the storage chamber and the refrigeration chamber is manufactured through the fan, and then the starting and stopping of the refrigerator are controlled through the pressure difference, on one hand, compared with the existing timing control and temperature control, the frostless refrigerator realizes that the working state of the refrigerator is controlled through the frosting amount, the control effect is more efficient and energy-saving, and the service life is relatively long; on the other hand, the small circulation of air flow can be formed in the refrigerating chamber in the defrosting process, the heat conduction rate of the defrosting device is improved, the defrosting efficiency is improved, the working time of a single defrosting device is shortened, the working strength of the defrosting device is reduced, and the service life of the defrosting device is prolonged.

2. This frostless refrigerator of negative pressure control because the storeroom has formed the negative pressure, under the effect of pressure difference, has increased the pressure of refrigerator door and box, has improved sealed effect, and the temperature in the refrigerator can be kept to better sealed effect, and the temperature difference when reducing the inner loop alleviates the phenomenon of frosting, has further reduced the operating frequency of bimetallic strip and defrosting ware, further improves its life.

Drawings

FIG. 1 is a rear view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic view of the frosting tube structure of the present invention;

FIG. 4 is a schematic view of a structural differential pressure control member of the present invention;

fig. 5 is a schematic view of a conventional frost-free refrigerator.

In the figure: 1. a housing; 2. a refrigeration compartment; 3. a refrigerator; 4. a defrosting device; 5. an air return channel; 6. air cooling channels; 7. a frosting tube; 8. a fan; 9. a differential pressure control member; 91. a fixed tube; 92. a first electrode; 93. a second electrode; 94. a first magnet; 95. a second magnet; 96. a plunger; 10. a negative pressure eliminating member; 11. a small circulation channel.

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.

Referring to fig. 1-2, a negative pressure controlled frost-free refrigerator comprises a housing 1, a closed refrigerating chamber 2 is arranged in the freezing chamber of the housing 1, a refrigerator 3 and a defrosting device 4 are assembled in the refrigerating chamber 2, the defrosting device 4 is arranged at the bottom of the refrigerator 3, the refrigerator 3 is communicated with a compressor, an air return channel 5 and an air cooling channel 6 which are communicated with each storage chamber are arranged on the inner wall of the housing 1, a throttle valve is arranged on the air cooling channel 6 to make the flow of the air return channel smaller than the main pipe flow of the air return channel 5, the air return channel 5 is converged into a main pipe and communicated with a frosting pipe 7 through the main pipe, a fan 8 which makes the air flow to the refrigerating chamber 2 is arranged on the frosting pipe 7, the air flow of the storage chambers flows to the refrigerating chamber 2 through the air return channel 5 under the action of the fan 8, and flows back to each storage chamber through the air cooling channel 6 after, because the velocity difference of return air passageway 5 and air-cooled passageway 6, form the negative pressure in the storeroom, form relative high pressure in the refrigeration room 2 simultaneously, the area of circulation of frosting pipe 7 reduces along with going on of frosting gradually, along with the aggravation of frosting in the frosting pipe 7, return air passageway 5 and air-cooled passageway 6's flow is the same gradually, make the pressure differential of refrigeration room 2 and storeroom reduce, be equipped with the pressure differential control 9 of response refrigeration room 2 and storeroom pressure differential in refrigeration room 2, trigger the defroster 4 when pressure differential reduces and start, and trigger the defroster 4 and stop when the pressure differential resumes the setting value, the refrigerator door of casing 1 is equipped with negative pressure elimination spare 10, the negative pressure of storeroom is eliminated to negative pressure elimination spare 10, be convenient for open of refrigerator door.

Referring to fig. 3, the frosting tube 7 is a wide and flat cylinder, the frosting tube 7 is made of a good thermal conductor and can be made of all copper or all aluminum, a reversing channel formed by concave-convex fit gaps is arranged in the frosting tube 7, on one hand, the heat exchange efficiency can be ensured by a long and narrow channel with a section, so that the frosting tube 7 can be quickly frosted and quickly melted after the temperature rises, on the other hand, the frosting tube is extremely easy to be blocked by frost while ensuring a large flow rate, the self-regulation sensitivity is improved, an inclined plane is arranged on one side of the reversing channel, which is the same as a popular side, so that the water can conveniently flow, and the water is prevented from being retained in the frosting tube.

Referring to fig. 4, the pressure difference control member 9 is disposed on the header pipe communicated with the frosting pipe 7, one end of the frosting pipe 7 is communicated with the inside of the frosting pipe 7, the other end of the frosting pipe is communicated with the inside of the cooling chamber 2, the pressure difference control member 9 includes a fixing pipe 91 installed on the outer wall of the frosting pipe 7, one end of the fixing pipe 91 is provided with a first electrode 92 and a first magnet 94, the inner wall of the fixing pipe 91 is movably connected with a plunger 96, one side of the plunger 96 facing the first electrode 92 is provided with a second electrode 93 and a second magnet 95, the second magnet 95 and the first magnet 94 exhibit suction force, when the second electrode 93 and the first electrode 92 are pressed, a gap is still left between the first magnet 94 and the second magnet 95, the first electrode 92 and the second electrode 93 control the on-off of the refrigerator 3, the maximum magnetic force between the first magnet 94 and the second magnet 95 is smaller than the maximum pressure difference, when the frost is less in the frosting pipe 7, the pressure, the first electrode 92 and the second electrode 93 are separated from contact, the refrigerator 3 stops working, when the frost in the frost forming pipe 7 is more, the pressure at two ends of the pressure difference control part 9 is less, the first electrode 92 and the second electrode 93 are attached together under the action of magnetic force, and the refrigerator 3 works and defrosts.

The side wall of a main pipe of the frosting pipe 7 is provided with a small throttling circulation channel 11, the circulation section of the small circulation channel 11 is smaller than the main pipe section of the return air channel 5, the small circulation channel 11 and the air cooling channel 6 are respectively provided with an electric control valve, the on-off of a first electrode 92 and a second electrode 93 drives the electric control valve on the small circulation channel 11 to be communicated, the electric control valve on the air cooling channel 6 is closed, when the defrosting work is carried out, the first electrode 92 and the second electrode 93 are communicated, the small circulation channel 11 is communicated, hot air flows circulate in the refrigerating chamber 2, and the temperature of the storage chamber is prevented from rising.

The negative pressure eliminating part 10 is a switch for controlling the starting and stopping of the fan 8, when the fan 8 is closed, airflow naturally flows under the action of pressure difference, negative pressure of the storage chamber disappears, the refrigerator can be freely opened, and meanwhile, negative pressure is eliminated in time, and the entering of outside air is reduced.

The working principle and the working process of the invention are as follows:

after the refrigerator is closed, the refrigerator 3 works to reduce the temperature in the refrigerating chamber 2, the fan 8 is opened to force the airflow to flow, negative pressure is formed in the storage chamber under the overflow action of the return air channel 5, the refrigerator door is tightly closed due to high external air pressure, water in the air can be separated out and frosted in the frosting pipe 7 at first with the operation of the refrigerator, the flow rate of the frosting pipe 7 per unit time is reduced, the air pressure difference between the refrigerating chamber 2 and the storage chamber is reduced, the negative pressure difference between two ends of the frosting pipe 7 is reduced to be smaller than the suction force of the first magnet 94 and the second magnet 95, the first electrode 92 is communicated with the second electrode 93, the small circulating channel 11 is closed by the air cooling channel 6, meanwhile, the refrigerator 3 starts to work, the flow rate of the frosting pipe 7 per unit time is increased with the melting of the frost, the pressure difference between two ends of the frosting pipe 7 is increased and is larger than the suction, the first electrode 92 and the second electrode 93 are disconnected, the refrigerator 3 stops working, the small circulation passage 11 is closed, and the air cooling passage 6 is opened.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a frostless refrigerator of negative pressure control, includes casing (1), the freezer of casing (1) is equipped with confined refrigeration room (2) by the lining, be equipped with refrigerator (3) and defroster (4) in refrigeration room (2), its characterized in that: the inner wall of casing (1) is equipped with return air passageway (5) and the air-cooled passageway (6) of each storeroom of intercommunication, be equipped with the choke valve on air-cooled passageway (6) and make its flow be less than the house steward flow of return air passageway (5), return air passageway (5) collect a house steward and have frosting pipe (7) through the house steward intercommunication, be equipped with fan (8) that make the air current flow direction refrigeration room (2) on frosting pipe (7), the flow area of frosting pipe (7) reduces gradually along with going on of frosting, be equipped with pressure differential control (9) of response refrigeration room (2) and storeroom pressure differential in refrigeration room (2), opening of pressure differential control (9) control (3) stops, the refrigerator door of casing (1) is equipped with negative pressure elimination spare (10).

2. The negative pressure controlled frost-free refrigerator of claim 1, wherein: the frosting pipe (7) is a wide and flat cylinder, the frosting pipe (7) is made of a good hot conductor, a reversing channel formed by concave-convex fit gaps is arranged in the frosting pipe (7), and an inclined plane is arranged on one side of the reversing channel, which is identical to the popular side.

3. The negative pressure controlled frost-free refrigerator of claim 1, wherein: the pressure difference control piece (9) is arranged on a header pipe communicated with the frosting pipe (7), one end of the frosting pipe (7) is communicated with the interior of the frosting pipe (7), the other end of the frosting pipe is communicated with the interior of the refrigerating chamber (2), the pressure difference control member (9) comprises a fixed pipe (91) arranged on the outer wall of the frosting pipe (7), one end of the fixed tube (91) is provided with a first electrode (92) and a first magnet (94), the inner wall of the fixed tube (91) is movably connected with a plunger (96), one side of the plunger (96) opposite to the first electrode (92) is provided with a second electrode (93) and a second magnet (95), the second magnet (95) and the first magnet (94) show attraction, the first electrode (92) and the second electrode (93) control the on-off of the refrigerator (3), the maximum magnetic force between the first magnet (94) and the second magnet (95) is less than the maximum pressure differential.

4. The negative pressure controlled frost-free refrigerator of claim 3, wherein: the side wall of a main pipe of the frosting pipe (7) is provided with a small throttling circulation channel (11), the circulation section of the small circulation channel (11) is smaller than the section of the main pipe of the air return channel (5), the small circulation channel (11) and the air cooling channel (6) are respectively provided with an electric control valve, and the small circulation channel (11) is driven to be communicated with the electric control valves by the on-off of the first electrode (92) and the second electrode (93).

5. The negative pressure controlled frost-free refrigerator of claim 1, wherein: the negative pressure eliminating piece (10) is a switch for controlling the starting and stopping of the fan (8).