CN113639507B

CN113639507B - Refrigerating and freezing equipment

Info

Publication number: CN113639507B
Application number: CN202110813017.9A
Authority: CN
Inventors: 李军平; 赵彩云; 缪丽燕; 孔德强
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd; Chongqing Haier Refrigeration Electric Appliance Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd; Chongqing Haier Refrigeration Electric Appliance Co Ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-11-22
Anticipated expiration: 2041-07-19
Also published as: CN113639507A

Abstract

The invention provides a refrigerating and freezing device. Wherein the refrigeration and freezing apparatus comprises: sealed drawer sets up in storage space, includes: the drawer cylinder is provided with a forward opening, a fresh-keeping space is limited in the drawer cylinder, and an accommodating cavity communicated with the fresh-keeping space is arranged in the top wall of the drawer cylinder; the drawer body is slidably arranged in the drawer cylinder; first fan sets up in holding the chamber, and holds and has offered the ventilation hole in the wall between chamber and the fresh-keeping space to the intercommunication holds chamber and fresh-keeping space, and the back wall that holds the chamber is provided with mechanical valve, and the configuration is blown open under the condition that first fan was opened, so that hold chamber and sealed drawer outside intercommunication, and the supersaturated steam in the fresh-keeping space is discharged to sealed drawer outside via ventilation hole and mechanical valve in proper order. The refrigeration and freezing equipment disclosed by the invention has the advantages that the humidity in the fresh-keeping space is effectively reduced, the problems of inner wall condensation, vegetable decay, too fast fruit ripening and the like are avoided, and the storage effect of food is improved.

Description

Refrigerating and freezing equipment

Technical Field

The invention relates to the field of article storage, in particular to a refrigerating and freezing device.

Background

With the social development, the living standard of people is improved day by day, and the pace of life of people is faster and faster, people often buy a large amount of goods to place in various refrigeration and freezing equipment, but for leaf vegetables and fruits, the phenomenon that the skins of the foods are wrinkled and blotched can be caused by the low temperature in the storage space of the refrigeration and freezing equipment, and the original taste and nutrition of the foods can be influenced.

In the preservation technology of the refrigeration and freezing equipment, oxygen is closely related to the oxidation and respiration of food in the refrigeration and freezing equipment. The slower the respiration of the food, the lower the oxidation of the food and the longer the preservation time. The oxygen content in the air is reduced, and the fresh-keeping effect on the food is obvious. At present, in order to reduce the oxygen content in the refrigeration and freezing equipment, in the prior art, vacuum preservation is generally utilized or a deoxidation device is additionally arranged for low-oxygen preservation. However, the operation of vacuum preservation is usually complicated and inconvenient to use; the deoxidation device usually uses electrolyte to remove oxygen, and the device is complex and the oxygen removal effect is not obvious.

Modified atmosphere technology generally refers to technology for prolonging the storage life of food by regulating the gas atmosphere (gas component ratio or gas pressure) of a closed space where stored goods are located, and the basic principle is as follows: in a certain closed space, a gas atmosphere different from normal air components is obtained through various regulation modes so as to inhibit the physiological and biochemical processes and the activities of microorganisms which cause the putrefaction and deterioration of stored objects (generally food materials). In particular, in the present application, the modified atmosphere preservation discussed will be specific to modified atmosphere preservation techniques that regulate the proportions of the gas components.

As is known to those skilled in the art, the normal air composition includes (in volume percent, the same applies hereinafter): about 78% nitrogen, about 21% oxygen, about 0.939% noble gases (helium, neon, argon, krypton, xenon, radon), 0.031% carbon dioxide, and 0.03% other gases and impurities (e.g., ozone, nitric oxide, nitrogen dioxide, water vapor, etc.). In the field of modified atmosphere preservation, nitrogen-rich and oxygen-poor preservation gas atmosphere is obtained by filling nitrogen-rich gas into a closed space to reduce oxygen content. Here, as is known to those skilled in the art, nitrogen-rich gas refers to a gas having a nitrogen content exceeding that of the normal air, for example, the nitrogen content therein may be 95% to 99%, or even higher; the nitrogen-rich and oxygen-poor fresh-keeping gas atmosphere refers to a gas atmosphere in which the nitrogen content exceeds the nitrogen content in the normal air and the oxygen content is lower than the oxygen content in the normal air.

Often set up confined space as the freshfood compartment in the storing space among the prior art, but harmful components such as inside humidity is too big, oxygen concentration risees, ethylene high-order problem easily appears in present confined space, leads to inner wall condensation, vegetables to rot, fruit is ripe at the excessive speed, seriously influences user's use and experiences.

Disclosure of Invention

The invention aims to reduce the humidity in the fresh-keeping space of the refrigeration and freezing equipment and improve the storage effect.

A further object of the present invention is to achieve gas atmosphere regulation in the fresh-keeping space and to improve the user experience.

In particular, the present invention provides a refrigeration and freezing apparatus comprising: a box body, the interior of which is limited with a storage space; the door body is arranged on the front surface of the box body and used for sealing the storage space; sealed drawer sets up in the storing space, includes: the drawer cylinder is provided with a forward opening, a fresh-keeping space is limited in the drawer cylinder, and an accommodating cavity communicated with the fresh-keeping space is arranged in the top wall of the drawer cylinder; the drawer body is slidably arranged in the drawer cylinder; and first fan sets up in holding the chamber, and has seted up the hole of ventilating in the wall that holds between chamber and the fresh-keeping space to the intercommunication holds chamber and fresh-keeping space, and the back wall that holds the chamber is provided with mechanical valve, configures to be blown open under the condition that first fan opened, so that hold chamber and the outside intercommunication of sealed drawer, and the supersaturated steam in the fresh-keeping space is discharged to sealed drawer outside via ventilating hole and mechanical valve in proper order.

Optionally, the mechanical valve is further configured to: the rear wall of the accommodating cavity is attached under the condition that the first fan is closed, so that the accommodating cavity is isolated from the outside of the sealed drawer.

Optionally, the refrigeration-freezing apparatus further comprises: the humidity sensor is arranged in the fresh-keeping space and is configured to detect actual humidity in the fresh-keeping space, and the first fan is configured to be opened under the condition that the actual humidity is greater than or equal to a preset humidity threshold value so as to discharge saturated water vapor in the fresh-keeping space and reduce the humidity in the fresh-keeping space.

Optionally, at least one first vent hole and at least one second vent hole spaced apart from the at least one first vent hole are opened in a wall surface between the accommodating cavity and the fresh-keeping space to communicate the accommodating cavity and the fresh-keeping space at different positions, respectively.

Optionally, the refrigeration freezer further comprises: the second fan is arranged in the accommodating cavity to enable the gas in the fresh-keeping space to return to the fresh-keeping space through the at least one first vent hole, the accommodating cavity and the at least one second vent hole in sequence.

Optionally, the refrigeration-freezing apparatus further comprises: and the modified atmosphere modules are accommodated in the accommodating cavity, each modified atmosphere module is provided with at least one modified atmosphere membrane and one oxygen-enriched gas collecting cavity, and the modified atmosphere modules are configured to enable more oxygen in the airflow in the space around the modified atmosphere module to penetrate through the modified atmosphere membrane and enter the oxygen-enriched gas collecting cavity relative to nitrogen in the airflow.

Optionally, the first fan is located above the air exchange hole, the second fan is located above the first vent hole, and the modified atmosphere module is located above the second vent hole.

Optionally, the box body further defines a compressor compartment therein, and the refrigeration and freezing apparatus further comprises: and the air pump assembly is arranged in the compressor bin and comprises an air pump, the inlet end of the air pump is controllably communicated with the oxygen-enriched gas collecting cavity through a pipeline and a pipeline switching mechanism, and the air pump assembly is configured to communicate the inlet end of the air pump to the pipeline of the oxygen-enriched gas collecting cavity according to the air conditioning demand condition of the fresh-keeping space so as to pump and discharge the gas in the oxygen-enriched gas collecting cavity to the outside of the sealed drawer.

Optionally, the refrigeration-freezing apparatus further comprises: an oxygen sensor disposed in the fresh-keeping space to detect an actual oxygen concentration in each fresh-keeping space, and the air pump assembly is further configured to: and under the condition that the actual oxygen concentration in the fresh space is equal to or less than a preset concentration threshold value, driving the pipeline switching mechanism to close the pipeline from the inlet end of the air pump to the oxygen-enriched gas collecting cavity, and controlling the air pump to stop running.

Optionally, a plurality of air pressure balance holes are formed in the drawer cylinder body so as to communicate the storage space with the fresh-keeping space.

The refrigerating and freezing apparatus of the present invention comprises: a box body, wherein a storage space is limited in the box body; the door body is arranged on the front surface of the box body and used for sealing the storage space; sealed drawer sets up in the storing space, includes: the drawer barrel is provided with a forward opening, a fresh-keeping space is limited in the drawer barrel, and an accommodating cavity communicated with the fresh-keeping space is arranged in the top wall of the drawer barrel; the drawer body is slidably arranged in the drawer cylinder; and first fan, set up in holding the chamber, and hold and set up in the wall between chamber and the fresh-keeping space and trade the wind hole, hold chamber and fresh-keeping space with the intercommunication, the back wall that holds the chamber is provided with mechanical valve, the configuration is blown open under the condition that first fan was opened, so that hold chamber and the outside intercommunication of sealed drawer, supersaturated steam in the fresh-keeping space is outside via trading wind hole and mechanical valve discharge to sealed drawer in proper order, can effectively reduce the humidity in the fresh-keeping space, avoid appearing the inner wall condensation, vegetables are rotten, fruit is ripe scheduling problem at the excessive speed, promote the storage effect of food.

Further, the refrigeration and freezing apparatus of the present invention further comprises: the modified atmosphere modules are accommodated in the accommodating cavity, each modified atmosphere module is provided with at least one modified atmosphere membrane and one oxygen-enriched gas collecting cavity, and the modified atmosphere modules are configured to enable more oxygen in the airflow in the space around the modified atmosphere modules to penetrate through the modified atmosphere membrane and enter the oxygen-enriched gas collecting cavity relative to nitrogen in the airflow; air pump assembly, set up in the compressor storehouse, air pump assembly includes the aspiration pump, the entrance point of aspiration pump collects the chamber intercommunication with the oxygen-enriched gas via pipeline and pipeline switching mechanism controlled ground, and the aspiration pump assembly configures to the gas conditioning demand situation according to fresh-keeping space, the entrance point of intercommunication aspiration pump to the pipeline in oxygen-enriched gas collection chamber, with the gas pump-out in collecting the chamber with the oxygen-enriched gas outside sealed drawer, the fresh-keeping demand of article in the fully provided fresh-keeping space, guarantee the storage effect of article, effectively promote user's use and experience.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic block diagram of a refrigeration freezer in accordance with one embodiment of the invention;

fig. 2 is a schematic configuration view of the refrigerating and freezing apparatus of fig. 1 viewed from another angle;

FIG. 3 is a schematic view of the sealed drawer of the refrigeration and freezing apparatus of FIG. 1;

FIG. 4 is a schematic block diagram of the sealed drawer of FIG. 3 viewed from another angle;

FIG. 5 is a schematic exploded view of the seal drawer shown in FIG. 4;

fig. 6 is a schematic structural view of a gas conditioning membrane module in a refrigerator-freezer according to an embodiment of the present invention;

FIG. 7 is a schematic exploded view of the modified atmosphere membrane module of FIG. 6;

FIG. 8 is a schematic block diagram of a support frame in the modified atmosphere module of FIG. 7;

FIG. 9 is a schematic structural view of the support frame in the modified atmosphere module shown in FIG. 7 from another angle; and

figure 10 is a schematic diagram of the construction of a suction pump assembly in a refrigerator freezer apparatus according to one embodiment of the invention.

Detailed Description

This embodiment provides a cold-stored refrigeration plant, can effectively reduce the humidity in the fresh-keeping space, avoids appearing inner wall condensation, vegetables decay, too fast ripe scheduling problem of fruit, promotes the storage effect of food. Wherein the refrigeration and freezing equipment can be a refrigerator, a freezer and the like. Fig. 1 is a schematic structural view of a refrigeration and freezing apparatus 100 according to an embodiment of the present invention; fig. 2 is a schematic configuration view of the refrigeration-freezing apparatus 100 of fig. 1 as viewed from another angle; fig. 3 is a schematic view of the structure of the seal drawer 11 in the refrigerating and freezing apparatus 100 shown in fig. 1; FIG. 4 is a schematic block diagram of the sealed drawer 11 of FIG. 3 viewed from another angle; fig. 5 is a schematic exploded view of the seal drawer 11 shown in fig. 4. As shown in fig. 1 to 5, the refrigerating and freezing apparatus 100 may generally include: the refrigerator comprises a refrigerator body 10, a door body, a sealing drawer 11 and a first fan 61.

Wherein the cabinet 10 defines therein a storage space 101. The number and structure of the storage spaces 101 may be configured as required, and fig. 1 shows the case of a first space, a second space and a third space which are sequentially arranged from top to bottom; the storage space can be configured into a refrigerating space, a freezing space, a temperature changing space or a fresh-keeping space according to different purposes. Each storage space may be divided into a plurality of storage regions by a partition plate, and the articles may be stored by a rack or a drawer.

The door body is disposed on a front surface of the cabinet 10 to enclose the storage space 101. The door bodies can be arranged corresponding to the storage spaces, namely, each storage space corresponds to one or more door bodies. The number of the storage spaces and the door bodies and the functions of the storage spaces can be actually selected according to specific conditions. The refrigeration and freezing apparatus 100 of the present embodiment is provided with a first door 21, a second door 22, and a third door 23 corresponding to a first space, a second space, and a third space sequentially arranged from top to bottom. The door body can be arranged on the front surface of the box body in a pivoting mode, and can be opened in a drawer mode to achieve a drawer-type storage space, wherein the drawer-type storage space is often provided with a metal sliding rail, so that the effect of the drawer in the opening and closing process can be guaranteed to be gentle, and noise can be reduced. The first space of the refrigerator-freezer 100 of the present embodiment is pivotally opened and the second and third spaces are drawer-opened.

The sealed drawer 11 is disposed in the storage space 101, and as shown in fig. 3, the sealed drawer 11 may include: a drawer cylinder 12 having a forward opening, defining a fresh-keeping space 102 therein, and having a receiving cavity 121 formed in a top wall thereof to communicate with the fresh-keeping space 102; and a drawer body 13 slidably mounted within the drawer cylinder 12 to operatively draw out and insert the drawer cylinder 12 inwardly from the forward opening of the drawer cylinder 12.

A plurality of air pressure balancing holes can be formed on the drawer cylinder 12 to communicate the storage space with the fresh-keeping space. The storage space and the fresh-keeping space can be communicated through a plurality of air pressure balancing holes. Each air pressure balance hole may be a millimeter-sized micro-hole, for example, each air pressure balance hole having a diameter of 0.1mm to 3mm. The pressure in the fresh-keeping space can be enabled not to be too low by arranging the air pressure balancing holes, the nitrogen in the fresh-keeping space can not flow to a large storage space due to the arrangement of the air pressure balancing holes, and the storage of food in the fresh-keeping space can not be influenced even if the nitrogen flows very little or even can be ignored. In other embodiments, the drawer cylinder 12 may not have a pressure balancing hole, even if a large amount of nitrogen and other gases exist in the fresh-keeping space, the user does not need to spend much effort when pulling the drawer body 13 open, and compared with the existing vacuum storage chamber, the drawer cylinder can save much labor.

First fan 61 sets up in holding chamber 121, and hold and open in the wall between chamber 121 and the fresh-keeping space 102 and be equipped with ventilation hole 62, hold chamber 121 and fresh-keeping space 102 with the intercommunication, the back wall that holds chamber 121 is provided with mechanical valve 63, dispose to be blown open under the condition that first fan 61 opened, so that hold chamber 121 and the outside intercommunication of sealed drawer 11, the supersaturated steam in the fresh-keeping space 102 is in proper order via ventilation hole 62 and mechanical valve 63 discharge to the outside of sealed drawer 11. Therefore, the humidity in the fresh-keeping space 102 can be effectively reduced, the problems of inner wall condensation, vegetable decay, too fast fruit ripening and the like are avoided, and the storage effect of food is improved.

The mechanical valve 63 may also be configured to: the rear wall of the accommodating chamber 121 is attached with the first fan 61 closed to seal the accommodating chamber 121 from the outside of the drawer 11. That is to say, when the first fan 61 is turned off, the mechanical valve 63 is attached to the rear wall of the accommodating cavity 121, so that the sealing effect can be effectively achieved. Meanwhile, air-conditioned preservation is realized in the preservation space 102 mentioned below, and oxygen-enriched gas is discharged, so that negative pressure is generated in the preservation space 102, the mechanical valve 63 can be more tightly attached to the rear wall of the accommodating cavity 121, and the sealing effect is enhanced.

In a preferred embodiment, the refrigerating and freezing apparatus 100 may further include: humidity transducer (not shown in the figure), set up in fresh-keeping space 102, configure to the actual humidity that detects in fresh-keeping space 102, and first fan 61 is configured to open under the condition that actual humidity is greater than or equal to and predetermines the humidity threshold value to discharge the saturated steam in fresh-keeping space 102, reduce the humidity in the fresh-keeping space 102, can the humidity in the accurate control fresh-keeping space 102. Moreover, the arrangement of the mechanical valve 63 avoids greatly changing the gas atmosphere of the fresh-keeping space 102 while reducing the humidity of the fresh-keeping space 102, so that the air-conditioning fresh-keeping effect is considered while the humidity of the fresh-keeping space 102 is adjusted.

As shown in fig. 5, at least one first vent hole 122 and at least one second vent hole 123 spaced apart from the at least one first vent hole 122 are opened in a wall surface between the accommodating chamber 121 and the fresh-keeping space to communicate the accommodating chamber 121 and the fresh-keeping space at different positions, respectively. The first ventilation hole 122 and the second ventilation hole 123 are both small holes, and the number of the first ventilation holes and the number of the second ventilation holes can be multiple. It should be noted that the ventilation hole 62 is also spaced apart from the first ventilation hole 122 and the second ventilation hole 123.

In some embodiments of the present invention, in order to promote the flow of the fresh food space and the air in the receiving cavity 121, the refrigerating and freezing device 100 may further include a second blower 60 disposed in the receiving cavity 121 to promote the air in the fresh food space to return to the fresh food space via the at least one first vent 122, the receiving cavity 121, and the at least one second vent 123 in this order. The second fan 60 is preferably a centrifugal fan, and is disposed in the accommodating chamber 121 at the first vent hole 122. That is, the second fan 60 is located above the at least one first vent hole 122 with the axis of rotation vertically downward, and the intake vent is directly opposite the first vent hole 122.

Further, the top wall of the drawer cylinder 12 may include a lower plate portion 124 and a cover plate portion 125, and the cover plate portion 125 is detachably provided to the lower plate portion 124 to form the accommodating chamber 121. As shown in fig. 5, the refrigerating and freezing apparatus 100 may further include: and modified atmosphere modules 30 accommodated in the accommodating cavities 121, wherein each modified atmosphere module 30 is provided with at least one modified atmosphere film and one oxygen-enriched gas collecting cavity and is configured to enable more oxygen in the airflow in the space around the modified atmosphere module to penetrate through the modified atmosphere film and enter the oxygen-enriched gas collecting cavity relative to the nitrogen in the airflow. That is, the space around the gas-regulating membrane assembly 30 is communicated with the fresh-keeping space 102, so that the gas-regulating preservation of the fresh-keeping space 102 can be realized.

In a specific embodiment, the first fan 61 is positioned above the ventilation hole 62, the second fan 60 is positioned above the first ventilation hole 122, and the modified atmosphere assembly 30 is positioned above the second ventilation hole 123. That is, the ventilation hole 62 is located below the first fan 61, the first ventilation hole 122 is located below the second fan 60, and the second ventilation hole 123 is located below the modified atmosphere module 30. Preferably, the first fan 61 and the second fan 60 may be both centrifugal fans. And, the second fan 60 has an inlet facing the first vent hole 122 and an outlet facing the atmosphere control assembly 30. The first fan 61 has an inlet facing the ventilation hole 62 and an outlet facing the mechanical valve 63.

The cabinet 10 may further define a compressor compartment therein, and the refrigerating and freezing apparatus 100 may further include: and a pump unit 40 disposed in the compressor compartment, wherein the pump unit 40 includes a pump 41, an inlet of the pump 41 is controllably communicated with the oxygen-enriched gas collection chamber via a pipe 50 and a pipe switching mechanism (not shown), and the pump unit 40 is configured to communicate the inlet of the pump 41 to the pipe of the oxygen-enriched gas collection chamber according to the air-conditioned demand condition of the fresh-keeping space, so as to pump the gas in the oxygen-enriched gas collection chamber out of the seal drawer 11.

The refrigerator freezer 100 can further include an oxygen sensor (not shown) disposed within the fresh food spaces to detect the actual oxygen concentration within each fresh food space, and the pump assembly 40 is further configured to: and under the condition that the actual oxygen concentration in the fresh-keeping space is equal to or less than the preset concentration threshold value of the fresh-keeping space, driving the pipeline switching mechanism to close the pipeline from the inlet end of the air pump 41 to the oxygen-enriched gas collecting cavity, and controlling the air pump 41 to stop running.

Fig. 6 is a schematic structural view of a gas atmosphere module in a refrigeration and freezing apparatus 100 according to an embodiment of the invention, fig. 7 is a schematic exploded view of the gas atmosphere module shown in fig. 6, fig. 8 is a schematic structural view of a supporting frame in the gas atmosphere module shown in fig. 7, and fig. 9 is a schematic structural view of the supporting frame in the gas atmosphere module shown in fig. 7, viewed from another angle. In this embodiment, the controlled atmosphere membrane is an oxygen-rich membrane, and the controlled atmosphere membrane module 30 may be an oxygen-rich membrane module 31. The oxygen-enriched membrane module 31 of the present embodiment may generally include: a support frame 32 and an oxygen-rich membrane 33 disposed on the support frame 32.

In the present embodiment, the oxygen-rich membrane 33 is permeable to all gases, except that different gases have different degrees of permeability. The permeation of gas through the oxygen-rich membrane 33 is a complex process, and the permeation mechanism is generally that gas molecules are first adsorbed to the surface of the oxygen-rich membrane 33 to be dissolved, then diffused in the oxygen-rich membrane 33, and finally desorbed from the other side of the oxygen-rich membrane 33. The oxygen-rich membrane separation technique relies on the difference in the solubility and diffusion coefficients of different gases in the oxygen-rich membrane 33 to achieve separation of the gases. When the mixed gas is under a certain driving force (pressure difference or pressure ratio between two sides of the oxygen-rich membrane 33), gases with relatively high permeation rate, such as oxygen, hydrogen, helium, hydrogen sulfide, carbon dioxide, and the like, permeate through the oxygen-rich membrane 33 and are enriched on the permeation side of the oxygen-rich membrane 33, while gases with relatively low permeation rate, such as nitrogen, carbon monoxide, and the like, are retained on the retention side of the oxygen-rich membrane 33 and are enriched, so that the purpose of separating the mixed gas is achieved.

The support frame 32 has a first surface 321 and a second surface 322 parallel to each other, and the support frame 32 is formed with a plurality of gas flow passages 323 extending on the first surface 321, the second surface 322, and the first surface 321 and the second surface 322, respectively, and penetrating the support frame 32 to communicate with each other. The plurality of gas flow channels 323 collectively form an oxygen-enriched gas collection chamber. The oxygen-rich membrane 33 of this embodiment is at least one, and preferably, two planar oxygen-rich membranes, which are respectively laid on the first surface 321 and the second surface 322 of the support frame 32. The oxygen-rich membrane 33 allows oxygen in the air outside the oxygen-rich membrane 33 to permeate the oxygen-rich membrane 33 into the oxygen-rich gas collection chamber to form oxygen-rich gas when the pressure on the inside of the oxygen-rich membrane is lower than the pressure on the outside of the oxygen-rich membrane, thereby making the air outside the oxygen-rich membrane nitrogen-rich gas.

In some embodiments, the support frame 32 includes a pumping hole 324 in communication with at least one of the aforementioned plurality of gas flow passages 323 to allow the oxygen-enriched gas in the oxygen-enriched gas collection chamber to be pumped by the pumping pump 41. As the oxygen-enriched gas in the oxygen-enriched gas collecting cavity is pumped out, the oxygen-enriched gas collecting cavity is in a negative pressure state, so that oxygen in the air outside the oxygen-enriched membrane assembly 31 continuously permeates the oxygen-enriched membrane 33 and enters the oxygen-enriched gas collecting cavity, and the air outside the oxygen-enriched membrane assembly 31 forms a nitrogen-enriched atmosphere. In some embodiments, the plurality of gas flow passages 323 formed inside the support frame 32 may be a plurality of cavities communicating with the pumping holes 324.

In some embodiments, referring to fig. 7 and 8, to further facilitate installation, the oxygen-enriched membrane 33 may be pre-fixed in the installation groove 327 of the support frame 32 by a ring of double-sided tape 325, and then a ring of sealant 326 is filled in the loop groove 328 of the support frame 32 to sealingly install the oxygen-enriched membrane 33 in the installation groove 327 of the support frame 32.

The inlet end of the suction pump 41 is in controlled communication with the oxygen-enriched gas collection chamber within the fresh food space via the line 50 and the line switching mechanism, and in particular may be in communication with the suction hole 324. The air pump 41 is configured to draw air outwardly through the air draw hole 324 so that the pressure of the oxygen-enriched gas collection chamber is less than the pressure of the fresh food space. That is, when the air pump 41 pumps air outwards, the air in the fresh-keeping space can flow to the oxygen-enriched membrane module, and under the action of the oxygen-enriched membrane module, part or all of the oxygen in the air in the fresh-keeping space enters the oxygen-enriched air collection chamber and then is discharged out of the fresh-keeping space through the pipeline 50 and the air pump 41, so that the nitrogen-enriched and oxygen-depleted gas atmosphere in the fresh-keeping space is obtained to facilitate the fresh-keeping of food.

The oxygen-enriched membrane component utilizes the difference of permeation rates of component gases in the air when the component gases permeate through the oxygen-enriched membrane, and oxygen in the air preferentially passes through the oxygen-enriched membrane to obtain oxygen under the driving of pressure difference. In other embodiments, the modified atmosphere membrane may also be a hollow fiber membrane, and the modified atmosphere membrane module is a hollow fiber membrane module, and the hollow fiber membrane module utilizes the difference of the transmission rate of each component gas in the air through the hollow fiber membrane, and since oxygen molecules are smaller than nitrogen molecules, the oxygen molecules preferentially transmit through the hollow fiber membrane to obtain oxygen.

Figure 10 is a schematic exploded view of the suction pump assembly 40 in the refrigerator freezer 100 according to one embodiment of the invention. As shown in FIG. 10, in some embodiments of the present invention, the suction pump assembly 40 can further include a mounting base plate 42 and a seal box 43. Mounting base plate 42 may be mounted to the bottom surface of compressor case 24 by a plurality of shock absorbing foot pads 44. The seal box 43 is attached to the mounting base plate 42. The suction pump 41 is installed in the hermetic case 43. That is, the suction pump 41 may be disposed inside a sealing box 43, and the sealing box 43 may be installed in the compressor compartment 24 through the installation base plate 42. The sealing box 43 can largely block the outward propagation of noise and/or waste heat when the suction pump 41 is operated. Further, in order to improve the damping and noise reduction effects, a plurality of damping pads 44 (which may be made of rubber) may be further installed on the installation base plate 42. The number of the vibration-damping foot pads 44 is preferably four, and the four vibration-damping foot pads 44 are installed in foot pad installation holes formed at four corners of the installation base plate 42.

In some embodiments of the present invention, a mounting frame is disposed inside the sealing box 43, the mounting frame is connected to the inner wall of the sealing box 43 through a plurality of damping pads, and the suction pump 41 is fixed inside the mounting frame, so as to reduce vibration and noise during operation of the suction pump 41. Specifically, the bottom of installation frame is provided with two damping cushion blocks, and the damping cushion block cover is established on the reference column of seal box 43 bottom surface. Two opposite sides of the mounting frame are respectively provided with a circular damping cushion block, and the damping cushion blocks are clamped in clamping grooves in corresponding side walls of the sealing box 43. And the other two opposite sides of the mounting frame are respectively fixed with a damping cushion block. The suction pump 41 may be located between respective damping blocks within a sealed box 43 and fastened to the mounting frame by screws.

The refrigeration system of the refrigeration and freezing equipment may be a refrigeration cycle system composed of a compressor, a condenser, a throttling device, an evaporator, and the like. The compressor is installed in the compressor storehouse. The evaporator is configured to directly or indirectly provide cooling energy into the storage space 101. For example, when the refrigerating and freezing apparatus is a compression-type direct-cooling refrigerator for home use, the evaporator may be disposed outside or inside the rear wall surface of the inner container. When the refrigerating and freezing equipment is a household compression type air-cooled refrigerator, the box body 10 is also internally provided with an evaporator chamber, the evaporator chamber is communicated with the storage space 101 through an air path system, an evaporator is arranged in the evaporator chamber, and a fan is arranged at an outlet of the evaporator chamber so as to circularly refrigerate the storage space 101.

In some embodiments of the present invention, the air pump 41 is disposed at one end of the compressor compartment, and the compressor can be disposed at the other end of the compressor compartment, so that the air pump 41 is located at a relatively long distance from the compressor, thereby reducing noise superposition and waste heat superposition. For example, the suction pump 41 may be provided at an end of the compressor compartment adjacent the pivoting side of the door body. When the refrigerating and freezing apparatus is a side by side refrigerator, the suction pump 41 may be provided at either end of the compressor compartment. In other embodiments of the invention, the suction pump 41 is located adjacent to the compressor and the suction pump 41 is located at one end of the compressor compartment between the compressor and the side wall of the compressor compartment. The air pump 41 is arranged in the compressor bin, so that the space of the compressor bin can be fully utilized, and other places are not additionally occupied, therefore, the additional volume of the refrigeration and freezing equipment cannot be increased, and the structure of the refrigeration and freezing equipment can be compact.

The refrigeration and freezing equipment 100 of the embodiment can effectively reduce the humidity in the fresh-keeping space 102, avoid the problems of inner wall condensation, vegetable decay, too fast fruit ripening and the like, and improve the storage effect of food; the fresh-keeping requirements of the articles in the fresh-keeping space 102 are fully met, the storage effect of the articles is ensured, and the use experience of a user is effectively improved.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A refrigeration freezer apparatus comprising:

a box body, wherein a storage space is limited in the box body;

the door body is arranged on the front surface of the box body and used for sealing the storage space;

sealed drawer, set up in the storing space, include: the drawer cylinder is provided with a forward opening, a fresh-keeping space is limited in the drawer cylinder, and an accommodating cavity communicated with the fresh-keeping space is arranged in the top wall of the drawer cylinder; the drawer body is slidably arranged in the drawer cylinder; and

the first fan is arranged in the accommodating cavity, and an air exchange hole is formed in the wall surface between the accommodating cavity and the fresh-keeping space so as to communicate the accommodating cavity and the fresh-keeping space,

the rear wall of the accommodating cavity is provided with a mechanical valve and is configured to be blown open when the first fan is turned on, so that the accommodating cavity is communicated with the outside of the sealed drawer, and supersaturated water vapor in the fresh-keeping space is discharged to the outside of the sealed drawer through the ventilation hole and the mechanical valve in sequence;

the humidity sensor is arranged in the fresh-keeping space and is configured to detect the actual humidity in the fresh-keeping space, and the first fan is configured to be started when the actual humidity is greater than or equal to a preset humidity threshold value so as to discharge saturated water vapor in the fresh-keeping space and reduce the humidity in the fresh-keeping space;

at least one first vent hole and at least one second vent hole spaced from the at least one first vent hole are formed in the wall surface between the accommodating cavity and the fresh-keeping space, so that the accommodating cavity and the fresh-keeping space are communicated at different positions respectively;

the second fan is arranged in the accommodating cavity to promote the gas in the fresh-keeping space to return to the fresh-keeping space through the at least one first vent hole, the accommodating cavity and the at least one second vent hole in sequence;

modified atmosphere components are accommodated in the accommodating cavity, each modified atmosphere component is provided with at least one modified atmosphere membrane and one oxygen-enriched gas collecting cavity, and the modified atmosphere components are configured to enable oxygen in the airflow of the space around the modified atmosphere component to penetrate the modified atmosphere membrane more than nitrogen in the airflow to enter the oxygen-enriched gas collecting cavity.

2. A refrigerator-freezer according to claim 1,

the mechanical valve is further configured to: the rear wall of the accommodating cavity is attached under the condition that the first fan is closed, so that the accommodating cavity is isolated from the outside of the sealed drawer.

3. The refrigeration-freezing apparatus of claim 1, wherein,

the first fan is positioned above the air exchange hole,

the second fan is positioned above the first vent hole,

the modified atmosphere membrane component is positioned above the second vent hole.

4. The refrigeration-freezing apparatus of claim 1, wherein,

the inside compressor storehouse that has still been injectd of box, and cold-stored refrigeration plant still includes: and the air pump assembly is arranged in the compressor bin and comprises an air pump, the inlet end of the air pump is controllably communicated with the oxygen-enriched gas collection cavity through a pipeline and a pipeline switching mechanism, and the air pump assembly is configured to communicate the inlet end of the air pump to the pipeline of the oxygen-enriched gas collection cavity according to the condition of the air conditioning requirement of the fresh-keeping space so as to pump and discharge the gas in the oxygen-enriched gas collection cavity to the outside of the sealed drawer.

5. The refrigeration chiller of claim 4, further comprising:

an oxygen sensor disposed in the fresh-keeping spaces to detect an actual oxygen concentration in each of the fresh-keeping spaces, and

the pump assembly is further configured to: and under the condition that the actual oxygen concentration in the fresh-keeping space is equal to or less than a preset concentration threshold, driving the pipeline switching mechanism to close the pipeline from the inlet end of the air pump to the oxygen-enriched gas collecting cavity, and controlling the air pump to stop running.

6. The refrigeration-freezing apparatus of claim 1, wherein,

a plurality of air pressure balance holes are formed in the drawer cylinder body to communicate the storage space with the fresh-keeping space.