CN118149524A - Refrigerating and freezing device - Google Patents

Abstract

The present invention relates to a refrigeration and freezing device, which includes an inner tank, wherein the inner tank is provided with: an evaporator cover plate, which is used to divide the internal space of the inner tank into a storage space and a cooling chamber located below the storage space, wherein the evaporator is placed in the cooling chamber; and an air duct assembly, which is arranged at the rear side of the storage space and has a plurality of air outlets arranged at intervals in the vertical direction. At least one storage drawer is arranged at the lower part of the storage space, and a gap channel is formed between the lowermost storage drawer adjacent to the evaporator cover plate and the evaporator cover plate; and the lower air outlet of the air duct assembly closest to the cooling chamber has a downwardly directed sub-air outlet, which is configured so that the cooling air flow blown out through it flows into the gap channel, thereby utilizing the flowing cooling air flow to quickly take away the water vapor formed by the cold and heat exchange in the gap channel, effectively solving the problem of frost or ice easily forming on the outer side of the storage drawer.

Description

Refrigeration and freezing equipment

Technical Field

The invention relates to refrigeration and freezing technology, in particular to a refrigeration and freezing device.

Background technique

In daily life, people mainly use refrigerators to store and preserve items. Common refrigerators in the prior art mainly include traditional two-door refrigerators, T-shaped refrigerators, French refrigerators, side-by-side refrigerators, etc. The evaporators of these refrigerators are usually placed on the back of the refrigerator body. In order to increase the storage space and improve the convenience of users to take and put items, some refrigerators place the cooling chamber for accommodating the evaporator at the bottom of the refrigerator, and separate the cooling chamber from the storage compartment above it by the evaporator cover. Storage drawers are usually provided at the bottom of the storage compartment, among which the rear part of the lowest storage drawer at the bottom is prone to frost or ice, and even affects the normal opening of the storage drawer. In addition, condensation is also prone to occur on the front side of the evaporator cover, and the outflow of condensation water affects user use.

Summary of the invention

At present, the technical personnel in this field have not found the root cause of the technical problems raised in the background technology part. The applicant of this application creatively realizes that the temperature of the items just put into the storage drawer is relatively high, and the cooling chamber under the evaporator cover is an extremely low temperature environment, especially for the freezing and cooling chamber that provides cooling airflow for the freezing compartment, the temperature inside is even lower. In addition, the rear side of the evaporator cover is usually not provided with insulation foam, and the coldness in the cooling chamber is easily transferred upward through the evaporator cover to the space between it and the storage drawer, resulting in a lower temperature in the space. The heat of the relatively high temperature items stored in the storage drawer is transferred to the storage drawer, which will cause frost or ice on the outer surface of the storage drawer where it contacts the cold air. When the ice is severe, the drawer cannot be opened normally. For the front side of the evaporator cover, the return air flow that absorbs the heat in the storage compartment flows through the front side of the evaporator cover and returns to the cooling chamber. The temperature of the return air flow is relatively high, while the temperature of the cooling chamber under the evaporator cover and the temperature of the items in the storage drawer after being frozen are relatively low. Therefore, a high temperature and low temperature junction area will be formed on the front side of the evaporator cover, so condensation problems are easily generated.

In order to solve these technical problems, the distance between the storage drawer and the evaporator cover can be increased to allow the hot air to transition to the cold air. However, this will waste a large part of the available space and the effect is unstable.

To this end, an object of the present invention is to overcome at least one defect of the prior art and to provide a refrigerator-freezer in which frost or ice is not easily generated on the outside of a storage drawer of a storage space.

Another object of the present invention is to prevent condensation from forming on the front side of the evaporator cover.

A further object of the present invention is to improve the refrigeration effect of the storage drawer.

In order to achieve the above object, the present invention provides a refrigeration and freezing device, which includes an inner container, wherein the inner container is provided with:

an evaporator cover plate, used to divide the inner space of the inner tank into a storage space and a cooling chamber located below the storage space, wherein the cooling chamber contains an evaporator for cooling airflow passing therethrough; and

An air duct assembly is arranged at the rear side of the storage space and has a plurality of air outlets arranged at intervals in the vertical direction, so as to transport the cooling airflow cooled by the evaporator to the storage space through the air outlets; wherein

At least one storage drawer is provided at the lower part of the storage space, and a gap channel is formed between the lowermost storage drawer adjacent to and located above the evaporator cover plate and the evaporator cover plate; and

The lower air outlet of the air duct assembly closest to the cooling chamber has a downward sub-air outlet facing downward, and the downward sub-air outlet is configured to allow the cooling air flow blown out through the downward sub-air outlet to flow into the gap channel.

Optionally, the evaporator cover plate includes a rear section extending obliquely downward from the rear to the front, and a middle section extending forward from the front end of the rear section; wherein

The gap channel is formed between a rear end of the lowermost storage drawer and the rear section, and between a bottom of the lowermost storage drawer and the middle section.

Optionally, the downward sub-air vent is located above the gap channel between the rear end of the bottom storage drawer and the rear section.

Optionally, the lower air outlet includes an air outlet cylinder protruding and extending forward from the forward surface of the air duct assembly, and the downward sub-air outlet is opened on the bottom wall of the air outlet cylinder and is adjacent to the forward surface of the air duct assembly.

Optionally, the air duct assembly is further provided with a guide plate located below the lower air outlet, and the guide plate extends forwardly and downwardly from the front surface of the air duct assembly to the top of the gap channel.

Optionally, the air duct assembly is further provided with a limiting structure located below the guide plate, and the rear end of the evaporator cover cooperates with the limiting structure to limit the relative displacement of the evaporator cover and the air duct assembly at least in the up and down directions.

Optionally, an angle formed by the guide plate and the forward surface of the air duct assembly above the guide plate is any angle value in the range of 130° to 150°.

Optionally, the lower air outlet also includes a forward sub-air outlet facing forward, and the forward sub-air outlet is configured to blow cooling airflow toward the top of the bottom storage drawer.

Optionally, a plurality of storage drawers are provided at the lower portion of the storage space;

A flow gap is formed between an upper storage drawer adjacent to and above the lowermost storage drawer, and the forward sub-air outlet is configured to face the flow gap to blow cooling airflow toward the flow gap.

Optionally, the inner tank is also provided with a return air cover plate connected to the front side of the evaporator cover plate, the return air cover plate is arranged on the front side of the cooling chamber, and the return air cover plate is provided with a front return air port for returning the return air flow in the storage space to the cooling chamber.

Optionally, the evaporator cover plate includes a rear section extending obliquely downward from the rear to the front, a middle section extending forward from the front end of the rear section, and a front section extending downward from the front end of the middle section; wherein

The front section is located at the front side of the cooling chamber and at the rear side of the return air cover plate. The front section is provided with a rear return air port for returning the return airflow flowing out of the front return air port to the cooling chamber.

Optionally, a freezing compartment with a frozen storage environment, or a variable temperature compartment selectively having a frozen storage environment or a refrigerated storage environment is formed in the storage space.

Optionally, the evaporator cover plate includes a rear section extending obliquely downward from the rear to the front, and a middle section extending forward from the front end of the rear section; wherein

A heat preservation structure is formed between the middle section and the evaporator, the top of the heat preservation structure abuts against the lower surface of the middle section, and the bottom of the heat preservation structure abuts against the top of the evaporator.

The refrigeration and freezing device of the present invention includes an inner tank, in which an evaporator cover and an air duct assembly are provided. The evaporator cover divides the internal space of the inner tank into a storage space and a cooling chamber located below the storage space. At least one storage drawer is provided at the lower part of the storage space, and a gap channel is formed between the lowermost storage drawer and the evaporator cover. The lower air outlet of the freezing air duct has a downwardly directed sub-air outlet, and the cooling airflow blown out from the downward sub-air outlet can flow into the gap channel, so that the flowing cooling airflow can quickly take away the water vapor formed by the cold and heat exchange in the gap channel, and the water vapor flows forward along the cooling airflow and finally returns to the cooling chamber, forming condensed water in the cooling chamber and being discharged through the drain outlet at the bottom of the cooling chamber, which effectively solves the problem of frost or ice easily forming on the outside of the storage drawer.

Furthermore, when the cooling chamber returns air from its front side, the cooling air flow circulating in the gap channel can also pass over the front side of the evaporator cover, thereby taking away the water vapor formed on the front side of the evaporator cover due to heat exchange, and the water vapor returns to the cooling chamber along the cooling air flow, forming condensed water in the cooling chamber and discharged through the drain outlet at the bottom of the cooling chamber, effectively solving the problem of condensed water easily generated on the front side of the evaporator cover.

Furthermore, in addition to the downward sub-air outlet for supplying air into the gap channel, the lower air outlet also includes a forward sub-air outlet for supplying air to the top of the bottom storage drawer, so that the cooling airflow blown out by the downward sub-air outlet and the forward sub-air outlet wraps the entire bottom storage drawer, and the bottom storage drawer is cooled simultaneously from top to bottom, so that the food in the bottom storage drawer is cooled more efficiently, and the cooling efficiency of the bottom storage drawer is improved. The present invention replaces the complex air duct used in the existing wrap-around air supply by cleverly designing the structure of the lower air outlet, and the structure is simpler and does not occupy the drawer storage space.

Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG1 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention;

Fig. 2 is a schematic cross-sectional view taken along the cutting line A-A in Fig. 1;

FIG3 is a schematic cross-sectional view of an inner container and its internal structure according to an embodiment of the present invention;

FIG4 is a schematic enlarged view of portion B in FIG3 ;

FIG5 is a schematic structural diagram of an air duct assembly and an evaporator cover according to an embodiment of the present invention;

FIG6 is a schematic enlarged view of portion C in FIG5 ;

7 is a schematic structural exploded view of an evaporator cover plate, a return air cover plate and a heat preservation structure according to an embodiment of the present invention;

FIG. 8 is a schematic bottom view and a partial enlarged view of an evaporator cover plate and a heat preservation structure according to an embodiment of the present invention.

Detailed ways

The present invention provides a refrigeration and freezing device, FIG1 is a schematic structural diagram of a refrigeration and freezing device according to an embodiment of the present invention, and FIG2 is a schematic cross-sectional view taken along the section line A-A in FIG1. Referring to FIG1 and FIG2, the refrigeration and freezing device 1 of the present invention includes an inner tank 110, in which an evaporator cover plate 40 and an air duct assembly 50 are disposed.

The evaporator cover plate 40 is used to divide the internal space of the liner 110 into a storage space 111 and a cooling chamber 112 located below the storage space 111. The cooling chamber 112 contains an evaporator 30 for cooling the airflow passing therethrough. The air duct assembly 50 is disposed at the rear side of the storage space 111 and has a plurality of air outlets arranged at intervals in the vertical direction, so as to transport the cooling airflow cooled by the evaporator 30 to the storage space 111 through the plurality of air outlets.

FIG3 is a schematic cross-sectional view of an inner tank and its internal structure according to an embodiment of the present invention, and FIG4 is a schematic enlarged view of part B in FIG3. At least one storage drawer is provided at the lower part of the storage space 111, and a gap channel 71 is formed between the lowermost storage drawer 61 adjacent to the evaporator cover plate 40 and the evaporator cover plate 40. The lower air outlet 51 of the air duct assembly 50 closest to the cooling chamber 112 has a downward sub-air outlet 511 facing downward, and the downward sub-air outlet 511 is configured so that the cooling air flow blown out thereof flows into the gap channel 71.

The refrigeration and freezing device 1 of the present invention comprises an inner tank 110, in which an evaporator cover plate 40 and an air duct assembly 50 are arranged. The evaporator cover plate 40 divides the inner space of the inner tank into a storage space 111 and a cooling chamber 112 located below the storage space 111. At least one storage drawer is arranged at the lower part of the storage space 111, and a gap channel 71 is formed between the lowermost storage drawer 61 and the evaporator cover plate 40. The lower air outlet 51 of the freezing air duct 50 has a downward sub-air outlet 511 facing downward, and the cooling airflow blown out from the downward sub-air outlet 511 can flow into the gap channel 71, so that the water vapor formed by the cold and heat exchange in the gap channel 71 is quickly taken away by the flowing cooling airflow, and the water vapor flows forward along the cooling airflow and finally returns to the cooling chamber 112, and the condensed water formed in the cooling chamber 112 is discharged through the drain outlet at the bottom of the cooling chamber 112, which effectively solves the problem that frost or ice is easily generated on the outside of the storage drawer.

Furthermore, when the cooling chamber 112 returns air from its front side, the cooling airflow flowing in the gap channel 71 can also pass over the front side and above the evaporator cover 40, thereby taking away the water vapor formed on the front side of the evaporator cover 40 due to the heat exchange, and the water vapor returns to the cooling chamber 112 along the cooling airflow, and condensed water is formed in the cooling chamber 112 and is discharged through the drain port at the bottom of the cooling chamber 112, thereby effectively solving the problem of condensed water being easily generated on the front side of the evaporator cover 40.

In some embodiments, the evaporator cover 40 includes a rear section 41 extending downwardly obliquely from the rear to the front, and a middle section 42 extending forward from the front end of the rear section 41. The gap channel 71 is formed between the rear end of the bottom storage drawer 61 and the rear section 41, and between the bottom of the bottom storage drawer 61 and the middle section 42. That is, cooling air flows through the rear side and the bottom of the bottom storage drawer 61, and the upper side of the entire evaporator cover 40. Therefore, the water vapor formed at any position of the rear side and the bottom of the bottom storage drawer 61, and the water vapor formed at any position on the upper side of the evaporator cover 40 can be taken away by the cooling air flow, thereby more comprehensively and thoroughly avoiding the problem of condensation or frosting on the outer side of the bottom storage drawer 61 and the upper surface of the evaporator cover 40.

Specifically, the gap channel 71 may include an upstream section formed between the rear end of the lowest storage drawer 61 and the rear section 41 and extending downwardly obliquely from the rear to the front, and a downstream section formed between the bottom of the lowest storage drawer 61 and the middle section 42 and extending forward.

In some embodiments, the downward sub-air vent 511 is located above the gap channel 71 between the rear end of the bottom storage drawer 61 and the rear section 41. In other words, the downward sub-air vent 511 is located above the upstream section of the gap channel 71. Thus, the downward sub-air vent 511 directly corresponds to the upstream section of the gap channel 71, so that the cooling airflow is blown directly toward the upstream section of the gap channel 71, and the cooling airflow smoothly transitions from the upstream section of the gap channel 71 to the downstream section of the gap channel 71, completing the smooth reversal of the cooling airflow, reducing the flow resistance of the cooling airflow, and ensuring that the cooling airflow has a high flow rate to carry away moisture.

FIG5 is a schematic structural diagram of an air duct assembly and an evaporator cover according to an embodiment of the present invention, and FIG6 is a schematic enlarged diagram of part C in FIG5. In some embodiments, the lower air outlet 51 includes an air outlet cylinder 513 protruding forward from the forward surface 50a of the air duct assembly 50, and the downward sub-air outlet 511 is opened on the bottom wall of the air outlet cylinder 513 and is adjacent to the forward surface 50a of the air duct assembly 50. That is, the downward sub-air outlet 511 is opened at the position of the air outlet cylinder 513 closest to the air supply duct inside the air duct assembly 50, so that at least part of the cooling airflow flowing into the air outlet cylinder 513 from the air supply duct can flow out from the downward sub-air outlet 511 as quickly as possible, thereby reducing the flow velocity loss of the cooling airflow flowing into the gap channel 71 as much as possible.

Since the downward sub-air outlet 511 is adjacent to the front surface 50a of the air duct assembly 50 and is relatively backward, the cooling airflow blown downward through the downward sub-air outlet 511 is close to the front surface 50a of the air duct assembly 50, and is not easy to disperse and flow into the gap channel 71. For this reason, in some embodiments, the air duct assembly 50 is further provided with a guide plate 52 located below the lower air outlet 51, and the guide plate 52 extends downward from the front surface 50a of the air duct assembly 50 to the top of the gap channel 71. Therefore, after the cooling airflow blown downward from the downward sub-air outlet 511 encounters the guide plate 52 below, it flows forward and downward to the gap channel 71 under the guidance of the guide plate 52, so that the cooling airflow that is relatively backward smoothly completes the reversal and flows forward and downward, reducing the airflow flow resistance.

Specifically, the guide plate 52 is a strip-shaped plate extending in the transverse direction of the air duct assembly 50 , so as to guide the cooling airflow in the transverse direction of the entire air duct assembly 50 , and the guiding range is relatively wide.

In some embodiments, the air duct assembly 50 is further provided with a limiting structure 53 located below the guide plate 52, and the rear end of the evaporator cover plate 40 cooperates with the limiting structure 53 to limit the relative displacement of the evaporator cover plate 40 and the air duct assembly 50 at least in the up and down directions. That is, the rear end of the evaporator cover plate 40 is installed on the limiting structure 53 of the air duct assembly 50, and the gap channel 71 formed thereby is located below the guide plate 52, and can receive the cooling airflow guided by the guide plate 52, and the position design is very reasonable. In addition, the rear end of the evaporator cover plate 40 can be limited by the limiting structure 53 to prevent the rear end of the evaporator cover plate 40 from moving upward.

Furthermore, the limiting structure 53 is configured to include a positioning rib that extends forward from the front surface 50a of the air duct assembly 50 and then bends and extends downward, so as to form a limiting space below the positioning rib. Specifically, the limiting space can be surrounded by the positioning rib and the front surface 50a of the air duct assembly 50, and the limiting space is open downward. The rear end of the evaporator cover 40 is inserted into the limiting space to limit the rear end of the evaporator cover 40 from moving upward or forward and backward. The positioning rib that extends forward and then bends and extends downward increases the mating interface area between the rear end of the evaporator cover 40 and the air duct assembly 50, improves the sealing effect between the two, and avoids air leakage between the cooling chamber 112 and the gap channel 71.

Specifically, the top of the rear end of the evaporator cover 40 can abut against the bottom wall of the positioning rib, thereby limiting the upward movement of the evaporator cover 40; the front side of the rear end of the evaporator cover 40 can abut against the front wall of the positioning rib, and the rear side of the rear end of the evaporator cover 40 can abut against the forward surface 50a of the air duct assembly 50, thereby limiting the forward and backward movement of the evaporator cover 40.

Furthermore, the guide plate 52 and the limiting structure 53 are both long strip structures extending from one lateral side of the air duct assembly 50 to the other lateral side thereof, and their structural strength is limited. Therefore, the present invention further connects the extended end of the guide plate 52 with the limiting structure 53, so that the guide plate 52 and the limiting structure 53 can form a whole, thereby improving the structural strength of the guide plate 52 and the limiting structure 53, and preventing the long strip guide plate 52 and the limiting structure 53 from being deformed or broken.

Specifically, the extended end of the guide plate 52 can be integrally formed with the upper portion of the positioning rib of the limiting structure 53 .

In some embodiments, the angle formed by the guide plate 52 and the forward surface 50a of the air duct assembly 50 above the guide plate 52 is any angle value in the range of 130° to 150°. For example, the angle formed by the guide plate 52 and the forward surface of the air duct assembly 50 above the guide plate 52 can be specifically 130°, 132°, 134°, 136°, 138°, 140°, 142°, 144°, 146°, 148° or 150°. Within this range, the air guiding effect of the guide plate 52 is the best. If the angle is too small, that is, the inclination of the guide plate 52 is relatively large, the reversal of the cooling airflow after encountering the guide plate 52 is relatively sudden. Accordingly, the airflow resistance generated by the guide plate 52 to the cooling airflow is also relatively large, and the flow velocity loss of the cooling airflow is relatively large, which will reduce the flow velocity of the cooling airflow in the gap channel 71. If the angle is too large, that is, the inclination of the guide plate 52 is relatively small, the guide plate 52 can not play a significant role in guiding the flow, and a longer guide path is required to guide the cooling airflow to the gap channel 71, which occupies a large space and is very unreasonable.

In some embodiments, the lower air outlet 51 further includes a forward sub-air outlet 512 facing forward, and the forward sub-air outlet 512 is configured to blow cooling air toward the top of the bottom storage drawer 61. That is, in addition to the downward sub-air outlet 511 for supplying air into the gap channel 71, the lower air outlet 51 also includes a forward sub-air outlet 512 for supplying air toward the top of the bottom storage drawer 61, thereby, the cooling airflow blown out by the downward sub-air outlet 511 and the forward sub-air outlet 512 wraps the entire bottom storage drawer 61, and the bottom storage drawer 61 is cooled simultaneously from top to bottom, so that the food in the bottom storage drawer 61 is cooled more efficiently, and the cooling efficiency of the bottom storage drawer 61 is improved.

The present invention replaces the complex air duct used in the existing wrapped air supply by cleverly designing the structure of the lower air outlet 51, and has a simpler structure without occupying the drawer storage space.

In some embodiments, a plurality of storage drawers are provided at the lower portion of the storage space 111. A flow gap 72 is formed between the upper storage drawer 62 adjacent to the lower storage drawer 61 and the lower storage drawer 61, and the forward sub-air outlet 512 is configured to face the flow gap 72 to blow cooling airflow to the flow gap 72. Thus, the cooling airflow flowing in the flow gap 72 can simultaneously cool the upper storage drawer 62 and the lower storage drawer 61, fully utilizing the cooling capacity of the cooling airflow flowing in the flow gap 72, and improving the cooling efficiency of the storage drawers.

FIG7 is a schematic structural exploded view of an evaporator cover, a return air cover, and a heat preservation structure according to an embodiment of the present invention. In some embodiments, the inner tank 110 is further provided with a return air cover 80 connected to the front side of the evaporator cover 40, the return air cover 80 is provided on the front side of the cooling chamber 112, and the return air cover 80 is provided with a front return air port 81 for the return air flow in the storage space 111 to return to the cooling chamber 112. The return air cover 80 can play a certain decorative role on the front of the evaporator cover 40 and the cooling chamber 112, thereby improving the appearance of the refrigeration and freezing device 1.

In some embodiments, the evaporator cover 40 includes a rear section 41 extending downwardly from the rear to the front, a middle section 42 extending forward from the front end of the rear section 41, and a front section 43 extending downwardly from the front end of the middle section 42. That is, the evaporator cover 40 is stepped, which is more suitable for the shape of the bottom of the inner tank 110 and fully utilizes the space.

Furthermore, the front section 43 is located at the front side of the cooling chamber 112 and at the rear side of the return air cover plate 80 , and a rear return air port 431 is provided on the front section 43 for the return air flow flowing out of the front return air port 81 to return to the cooling chamber 112 .

In some embodiments, a freezer compartment with a frozen storage environment, or a variable temperature compartment selectively having a frozen storage environment or a refrigerated storage environment is formed in the storage space 111. That is to say, the storage space 111 can be what is commonly referred to as a freezer space, or it can be what is commonly referred to as a variable temperature space. Since the temperature in the freezer space is relatively low, usually between -25 and 8°C, the temperature of the variable temperature space can usually be set between -25 and 8°C. When the variable temperature space is set to a frozen state, the temperature therein is also relatively low. Therefore, for the freezer space or the variable temperature space, the bottom storage drawer 61 and the evaporator cover 40 are more likely to produce condensation or frost, and are therefore more suitable for the above-mentioned technical solution of the present application to avoid the above-mentioned problems.

In some embodiments, the evaporator cover 40 includes a rear section 41 extending downwardly and obliquely from the rear to the front, and a middle section 42 extending forward from the front end of the rear section 41. A heat preservation structure 20 is formed between the middle section 42 and the evaporator 30, the top of the heat preservation structure 20 abuts against the lower surface of the middle section 42, and the bottom of the heat preservation structure 20 abuts against the top of the evaporator 30, thereby stably limiting the heat preservation structure 20 between the evaporator cover 40 and the evaporator 30, effectively isolating the heat transfer between the storage space 111 above the evaporator cover 40 and the evaporator 30 through the evaporator cover 40, thereby avoiding affecting the cooling effect of the storage space 111.

Further, referring to the schematic bottom view of the evaporator cover plate and the insulation structure and its partial enlarged view shown in FIG8 , the lateral sides of the middle section 42 are respectively provided with side flanges 421 protruding downward, and the insulation structure 20 is confined between the two side flanges 421. The applicant recognizes that due to the assembly gap between the insulation structure 20 and the side flanges 421, part of the return air in the storage space 111 will flow from front to back through the gap extending in the front-to-back direction formed between the insulation structure 20 and the side flanges 421 of the evaporator cover plate 40. This part of the return air may flow directly to the storage space 111 without being cooled by the cooling chamber 112, affecting the refrigeration efficiency of the storage space 111.

To this end, in some embodiments, a plurality of paving grooves 21 are provided at intervals in front and back on both lateral sides of the thermal insulation structure 20. A plurality of spoiler ribs 422 are provided at intervals in front and back on the side flange 421, and the plurality of spoiler ribs 422 are respectively inserted into the plurality of paving grooves 21 to form a plurality of detours in the gap in the front-to-back direction between the side flange 421 and the thermal insulation structure 20.

When the return air in the storage space 111 flows from front to back through the gap extending in the front-to-back direction formed between the side flange 421 of the heat preservation structure 20 and the evaporator cover plate 40, it will flow through multiple clearance grooves 21 in sequence, bypass the spoiler ribs 422 in the clearance grooves 21 and continue to flow backward, which is equivalent to flowing through multiple detours, extending the flow path of this part of the return air, increasing the number of flow direction changes of this part of the return air, thereby increasing the wind resistance of this part of the return air, effectively reducing the amount of return air that flows from front to back through the gap without passing through the evaporator for heat exchange, and improving the cooling effect. In addition, the cooperation of the spoiler ribs 422 and the clearance grooves 21 can also limit the relative movement of the heat preservation structure 20 and the evaporator cover plate 40 in the front-to-back direction.

Specifically, the clearance groove 21 is recessed laterally inward from the lateral side surface of the heat preservation structure 20 , and the spoiler rib 422 protrudes inward and extends from the inner side surface of the side flange 421 .

In some embodiments, the refrigerator-freezer 1 may be a single-compartment refrigerator having only one inner container 110 .

In other embodiments, the refrigeration and freezing device 1 can be a refrigerator with multiple chambers. The refrigeration and freezing device 1 also includes a second inner liner 120 and a third inner liner 130. The inner liner 110 is arranged on the first side of the box body 10 in the horizontal direction, and the storage space 111 formed therein is a freezing space with a frozen storage environment. The second inner liner 120 and the third inner liner 130 are both arranged on the second side of the box body 10 in the horizontal direction, and the second inner liner 120 is located above the third inner liner 130. A refrigerated space with a refrigerated storage environment is formed in the second inner liner 120, and a variable temperature space selectively having a refrigerated storage environment or a frozen storage environment is formed in the third inner liner 130, and a variable temperature cooling chamber for providing cold for the refrigerated space in the second inner liner 120 and the variable temperature space in the third inner liner 130, and another evaporator is provided in the variable temperature cooling chamber.

It should be understood by those skilled in the art that the embodiments described above are only some embodiments of the present invention, rather than all embodiments of the present invention, and these embodiments are intended to explain the technical principles of the present invention, rather than to limit the protection scope of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should still fall within the protection scope of the present invention.

It should be noted that, in the description of the present invention, terms such as "center", "up", "down", "top", "bottom", "front", "back", "vertical", "horizontal", "inside" and "outside" indicating directions or positional relationships are based on the actual use status of the refrigeration and freezing device 1. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

Furthermore, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and identified as covering all such other variations or modifications.

Claims (13)

1. The refrigerating and freezing device is characterized by comprising an inner container, wherein the inner container is internally provided with:

The evaporator cover plate is used for dividing the internal space of the liner into a storage space and a cooling chamber positioned below the storage space, and an evaporator used for cooling air flow passing through the cooling chamber is arranged in the cooling chamber; and

The air duct assembly is arranged at the rear side of the storage space and is provided with a plurality of air outlets which are arranged at intervals along the up-down direction, so that cooling air flow cooled by the evaporator is conveyed to the storage space through the air outlets; wherein the method comprises the steps of

At least one storage drawer is arranged at the lower part of the storage space, and a clearance channel is formed between the lowest storage drawer adjacently above the evaporator cover plate and the evaporator cover plate; and is also provided with

A lower air outlet of the air duct assembly closest to the cooling chamber has a downward-facing sub-air opening configured such that cooling air flow blown therethrough flows into the gap passage.

2. A refrigerating and freezing apparatus according to claim 1, wherein,

The evaporator pan includes a rear section extending obliquely downward from rear to front, and a middle section extending forward from a front end of the rear section; wherein the method comprises the steps of

The clearance channel is formed between a rear end of the lowermost storage drawer and the rear section, and between a bottom of the lowermost storage drawer and the middle section.

3. A refrigerating and freezing apparatus according to claim 2, wherein,

The downward sub-wind gap is located above the gap channel between the rear end of the lowermost storage drawer and the rear section.

4. A refrigerating and freezing apparatus according to claim 2, wherein,

The lower air outlet comprises an air outlet barrel which extends forwards from the front surface of the air duct component in a protruding mode, and the lower sub-air outlet is formed in the bottom wall of the air outlet barrel and is adjacent to the front surface of the air duct component.

5. A refrigerating and freezing apparatus according to claim 1, wherein,

And the air duct assembly is also provided with a guide plate positioned below the lower air outlet, and the guide plate extends to the top of the clearance channel from the forward surface of the air duct assembly in a forward inclined and downward manner.

6. A refrigerating and freezing apparatus according to claim 5, wherein,

And the air duct component is also provided with a limiting structure positioned below the guide plate, and the rear end of the evaporator cover plate is matched with the limiting structure so as to limit the relative displacement between the evaporator cover plate and the air duct component at least in the up-down direction.

7. A refrigerating and freezing apparatus according to claim 5, wherein,

The included angle formed by the guide plate and the front surface of the air duct component and positioned above the guide plate is any angle value ranging from 130 degrees to 150 degrees.

8. A refrigerating and freezing apparatus according to claim 1, wherein,

The lower air outlet further includes a forward-facing sub-air opening configured to blow a cooling air flow over the top of the lowermost storage drawer.

9. A refrigerating and freezing apparatus as recited in claim 8, wherein,

A plurality of storage drawers are arranged at the lower part of the storage space; wherein the method comprises the steps of

An excess flow gap is formed between an upper tier storage drawer adjacent above the lowermost tier storage drawer and the lowermost tier storage drawer, the forward sub-air opening being configured to be directed toward the excess flow gap to blow a cooling air flow toward the excess flow gap.

10. A refrigerating and freezing apparatus according to claim 1, wherein,

The inner container is also provided with a return air cover plate connected to the front side of the evaporator cover plate, the return air cover plate is covered on the front side of the cooling chamber, and a front return air opening for returning return air flow in the storage space to the cooling chamber is formed in the return air cover plate.

11. A refrigerating and freezing apparatus as recited in claim 10, wherein,

The evaporator pan includes a rear section extending obliquely downward from back to front, a middle section extending forward from a front end of the rear section, and a front section extending downward from a front end of the middle section; wherein the method comprises the steps of

The front section is positioned at the front side of the cooling chamber and at the rear side of the return air cover plate, and a rear return air opening for returning the return air flow flowing out of the front return air opening to the cooling chamber is formed in the front section.

12. A refrigerating and freezing apparatus according to claim 1, wherein,

The storage space is internally provided with a freezing compartment with a freezing storage environment or a temperature changing compartment with a freezing storage environment or a refrigerating storage environment selectively.

13. A refrigerating and freezing apparatus according to claim 1, wherein,

The evaporator pan includes a rear section extending obliquely downward from rear to front, and a middle section extending forward from a front end of the rear section; wherein the method comprises the steps of

An insulation structure is formed between the middle section and the evaporator, the top of the insulation structure is abutted to the lower surface of the middle section, and the bottom of the insulation structure is abutted to the top of the evaporator.