Refrigerator using centrifugal fan for heat dissipation

Abstract

The present invention provides a refrigerator that uses a centrifugal fan for heat dissipation, wherein a compressor and a condenser are distributed along lateral intervals in a compressor cabin defined by the bottom of the refrigerator, and the bottom wall of the box body defines a first bottom opening located at the front side of the compressor cabin, and the centrifugal fan is arranged on a lateral side of the first bottom opening, and has a fan outlet communicated with the space below the bottom wall of the box body, and is configured to inhale ambient air from the first bottom opening, and force the ambient air to pass through the condenser and the compressor, and then flow from the fan outlet to the bottom of the bottom wall of the box body and flow forward to the surrounding environment, thereby forming a heat dissipation airflow circulation below the bottom wall of the compressor cabin, and while reducing the space occupied by the refrigerator, the heat dissipation effect of the compressor cabin can be guaranteed; in addition, the lateral width of the compressor cabin is reduced, so that the refrigerator can be suitable for a smaller platform.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a refrigerator which uses a centrifugal fan for heat dissipation. Background Art

[0002] For the integrated cabinets assembled in the kitchen, in order to improve the aesthetics and integrity of the cabinets, the integrated cabinets often use built-in refrigerators. The space where the built-in refrigerator is located is limited, and the structural design of the refrigerator needs to focus on the storage space and heat dissipation of the refrigerator.

[0003] At present, built-in refrigerators generally form a heat dissipation circulation air path in the front-to-back direction. However, the reserved space between the back of the built-in refrigerator and the cabinet is small, the front-to-back airflow is not smooth, and the heat dissipation efficiency is low. In order to ensure smooth front-to-back airflow, it is necessary to increase the reserved space between the built-in refrigerator and the cabinet, which brings about the problem of increased space occupied by the refrigerator. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a refrigerator that overcomes the above problems or at least partially solves the above problems.

[0005] A further object of the present invention is to improve the heat dissipation efficiency of the compressor cabin and the heat exchange efficiency between the return air and the evaporator and to facilitate the discharge of condensed water.

[0006] The present invention provides a refrigerator, comprising:

[0007] A box body, the bottom of which defines a compressor cabin, in which a compressor and a condenser are distributed in a lateral interval, and the bottom wall of the box body defines a first bottom opening located at the front side of the compressor cabin;

[0008] A centrifugal fan is arranged on a lateral side of the first bottom opening, has a fan outlet communicated with the space below the bottom wall of the box body, and is configured to inhale ambient air from the first bottom opening and force the ambient air to pass through the condenser and the compressor, and then flow from the fan outlet to below the bottom wall of the box body and forward into the surrounding environment.

[0009] Optionally, the bottom wall of the box body further defines a second bottom opening located on a lateral side of the first bottom opening;

[0010] The first bottom opening is located below the front side of the condenser, and the second bottom opening is located below the front side of the compressor; or the first bottom opening is located below the front side of the compressor, and the second bottom opening is located below the front side of the condenser.

[0011] Optionally, the centrifugal fan is arranged at the second bottom opening in an upward tilt from front to back, a fan inlet is formed on the lower surface of the centrifugal fan, and a fan outlet is formed on the front end surface of the centrifugal fan that communicates with the space below the bottom wall of the box body.

[0012] Optionally, the refrigerator further comprises:

[0013] A wind shield extending forward and backward is arranged on the lower surface of the bottom wall of the box body and is arranged to isolate the first bottom opening from the second bottom opening, so as to laterally separate the space between the bottom wall of the box body and the supporting surface when the refrigerator is placed on a supporting surface.

[0014] Optionally, there are two windshield strips, which are arranged on the lower surface of the bottom wall of the box body at intervals in the transverse direction, and are arranged to separate a layout space between the first bottom opening and the second bottom opening, and the windshield strip adjacent to the first bottom opening is arranged to isolate the first bottom opening from the layout space, and the windshield strip adjacent to the second bottom opening is arranged to isolate the second bottom opening from the layout space;

[0015] The centrifugal fan is arranged in the arrangement space and is configured to inhale ambient air from the first bottom opening and the second bottom opening, causing the ambient air to pass through the condenser and the compressor, and then flow from the fan outlet to the bottom of the bottom wall of the box and flow forward to the surrounding environment.

[0016] Optionally, the refrigerator further comprises:

[0017] A storage liner is located in the upper front of the compressor cabin, and the storage liner defines a cooling space located below and a storage space located directly above the cooling space;

[0018] The evaporator is disposed in the cooling space and is configured to cool the airflow entering the cooling space so as to provide cooling airflow to at least the storage space.

[0019] Optionally, the refrigerator further comprises:

[0020] A top cover, which is inside the storage liner and divides the storage liner into the storage space located above and the cooling space located below;

[0021] At least one return air cover, disposed at the front end of the top cover, and defining the cooling space together with the top cover and the bottom wall of the storage liner;

[0022] The return air hood comprises:

[0023] The return air frame body located at the front side has a first front opening formed on the front wall surface and an open rear end;

[0024] The return air rear cover is inserted into the return air frame through the rear end opening of the return air frame, and is configured to separate the first front opening into a first front return air inlet located above and a second front return air inlet located below, so as to facilitate the return air of the storage space to flow back into the cooling space through the first front return air inlet and the second front return air inlet.

[0025] Optionally, the return air frame includes a first guide oblique section extending from the upper end of the front wall surface of the return air frame toward the rear and upward, and a second guide oblique section extending from the position of the front wall surface of the return air frame toward the rear and downward;

[0026] The return air rear cover includes a third guide oblique section extending from back to front to front and downward, a fourth guide oblique section extending from the lower end of the third guide oblique section to the front and downward, a fifth guide oblique section extending from the front end of the fourth guide oblique section to the rear and downward, and a sixth guide oblique section extending from the lower end of the fifth guide oblique section to the rear and downward;

[0027] Furthermore, the first guide oblique section, the third guide oblique section and the fourth guide oblique section define a first return air duct located behind the first front return air inlet, and the third guide oblique section is formed with a second rear opening;

[0028] The second guide oblique section and the sixth guide oblique section define a second return air duct located behind the second front return air inlet.

[0029] Optionally, the connection between the fourth guide slope section and the fifth guide slope section is located directly below the first guide slope section, so that condensed water condensed on the return air frame drips along the first guide slope section to the connection between the fourth guide slope section and the fifth guide slope section, and drips along the fifth guide slope section to the second guide slope section, and then flows to the bottom of the evaporator.

[0030] Optionally, the lower surface of the top cover is spaced apart from the upper surface of the evaporator, and the front end of the top cover is located above and behind the front end of the evaporator, so that the top cover does not completely cover the upper surface of the evaporator;

[0031] The return air rear cover also includes a shielding portion extending backward and upward from the third guide inclined section to the front end of the top cover to shield the section of the upper surface of the evaporator that is not shielded by the top cover;

[0032] Furthermore, the shielding portion is spaced from the upper surface of the evaporator to form an airflow bypass communicated with the second rear opening, so that at least part of the return air entering through the second rear opening enters the evaporator via the airflow bypass and is cooled by the evaporator.

[0033] In the refrigerator of the present invention, a heat dissipation air flow circulation is formed under the bottom wall of the compressor cabin, and there is no need to increase the interval between the back of the built-in refrigerator and the cabinet, thereby reducing the space occupied by the refrigerator and ensuring the heat dissipation effect of the compressor cabin of the built-in refrigerator. In addition, the centrifugal fan is located on the lateral side of the first bottom opening on the front side of the compressor cabin, and is not in the same lateral direction as the compressor and the condenser, which can reduce the lateral width of the compressor cabin, so that the refrigerator can be suitable for a smaller platform, and when it is necessary to compress the space in the width direction, it can still be guaranteed that the compressor cabin has good heat dissipation performance.

[0034] Furthermore, in the refrigerator of the present invention, a windshield is used to horizontally divide the space between the bottom wall of the box body and the supporting surface, thereby avoiding the cross-flow of airflow in the space on the horizontal left side of the windshield and the airflow in the space on the horizontal right side of the windshield, thereby ensuring heat dissipation efficiency.

[0035] Furthermore, in the refrigerator of the present invention, the space at the bottom of the refrigerator is a cooling space, which raises the height of the storage space above the cooling space, reduces the degree of bending that users need to do when taking and placing items in the storage space, and improves the user experience; in addition, two return air inlets distributed up and down are formed on the front side of the return air hood, which is not only visually beautiful, but also can effectively prevent children's fingers or foreign objects from entering the cooling space; and, the two return air areas distributed up and down can make the return air flow through the evaporator more evenly after entering the cooling space, which can avoid the problem of easy frost on the front end surface of the evaporator to a certain extent, which can not only improve the heat exchange efficiency, but also extend the defrost cycle, saving energy and being efficient.

[0036] Furthermore, in the refrigerator of the present invention, the design structure of each inclined section of the return air frame and the design structure of each inclined section of the return air rear cover can guide the condensed water formed on the return air cover to facilitate drainage, and can avoid the generation of water dripping sound perceptible to the human ear, thereby improving the user experience.

[0037] 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

[0038] 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:

[0039] Figure 1 is an exploded schematic diagram of a refrigerator according to an embodiment of the present invention;

[0040] Figure 2 is a schematic diagram of a refrigerator according to another embodiment of the present invention, wherein components such as a door body are hidden;

[0041] Figure 3 is a schematic diagram of the bottom structure of a refrigerator according to an embodiment of the present invention;

[0042] Figure 4 is a schematic diagram of various components in a compressor compartment of a refrigerator according to an embodiment of the present invention;

[0043] Figure 5 is a bottom view of a refrigerator according to a first embodiment of the present invention;

[0044] Figure 6 is a bottom view of a refrigerator according to a second embodiment of the present invention;

[0045] Figure 7 is a schematic diagram of a refrigerator according to a first embodiment of the present invention in one direction;

[0046] Figure 8 is a bottom view of a refrigerator according to a third embodiment of the present invention;

[0047] Fig. 9 is an exploded schematic diagram of a return air frame and a return air rear cover of a refrigerator according to an embodiment of the present invention;

[0048] Fig.10 is a partial cross-sectional view of a refrigerator according to an embodiment of the present invention; and

[0049] Fig.11 yes Fig.10 Magnified view of area B in the middle. DETAILED DESCRIPTION

[0050] This embodiment provides a refrigerator 100. Figures 1 to 11 In the following description, the directions or positional relationships indicated by "front", "rear", "up", "down", "lateral", etc. are directions or positional relationships based on the refrigerator 100 itself as a reference. Figure 2 , Figure 5 The direction indicated by the diagram, such as Figure 5 As shown, “lateral” refers to a direction parallel to the width direction of the refrigerator 100 .

[0051] like Figure 1 , Figure 2 As shown, the refrigerator 100 may generally include a box body, which includes an outer shell 110 and at least one storage liner arranged on the inner side of the outer shell 110, the space between the outer shell 110 and the storage liner is filled with a heat-insulating material (forming a foaming layer), and the storage liner defines a storage space. A corresponding door body is also provided on the front side of each storage liner to open and close the corresponding storage space.

[0052] The storage liner 130 located at the bottom may be a freezer liner, and accordingly, the storage space 132 defined in the storage liner 130 is a freezer space.

[0053] In one embodiment, if Figure 1 As shown, the refrigerator 100 also includes a refrigeration liner 120 located directly above the storage liner 130, which defines a refrigeration space 121. Two storage drawers 137 that can be pushed and pulled forward and backward to open and close are distributed above and below the storage liner 130. Two double-opening refrigeration doors 136 are provided on the front side of the refrigeration liner 120 to open and close the refrigeration space 121.

[0054] In another embodiment, if Figure 2 As shown, the refrigerator 100 further includes two transversely distributed variable temperature inner tanks 131 located directly above the storage inner tank 130 and a refrigeration inner tank 120 located directly above the two variable temperature inner tanks 131. A variable temperature space is defined in each variable temperature inner tank 131, and a refrigeration space 121 is defined in the refrigeration inner tank 120. Accordingly, corresponding doors should be provided on the front sides of the storage inner tank 130, the variable temperature inner tank 131, and the refrigeration inner tank 120.

[0055] As is well known to those skilled in the art, the temperature in the refrigerated space 121 is generally between 2°C and 10°C, preferably between 4°C and 7°C. The temperature in the freezer space is generally between -22°C and -14°C. The variable temperature space can be adjusted to -18°C to 8°C at will. Different types of items have different optimal storage temperatures and different suitable storage locations. For example, fruit and vegetable foods are suitable for storage in the refrigerated space 121, while meat foods are suitable for storage in the freezer space.

[0056] As those skilled in the art can appreciate, the refrigerator 100 of this embodiment may further include an evaporator 101, a compressor 104 and a condenser 105 arranged in a compressor compartment 180, and a throttling element (not shown), etc. The evaporator 101 is connected to the compressor 104, the condenser 105, and the throttling element via a refrigerant pipeline to form a refrigeration cycle, and the temperature of the compressor 104 is reduced when it is started to cool the air flowing through it.

[0057] like Figure 1 As shown, the bottom of the box body is defined with a pressurizing chamber 180, that is, the lower rear of the storage liner 130 is defined with a pressurizing chamber 180. Figure 2 In the embodiment shown, the bottom of the box body also defines a press cabin ( Figure 2 (not shown) The compressor 104 and the condenser 105 are arranged in the compressor cabin 180 with a spacing in the lateral direction.

[0058] In particular, the bottom wall of the box body is defined with a first bottom opening 110a located on the front side of the compressor cabin. The centrifugal fan 106 serving as a heat dissipation fan is arranged on a lateral side of the first bottom opening 110a, and has a fan outlet communicated with the space below the bottom wall of the box body. The centrifugal fan 106 is configured to inhale ambient air from the first bottom opening 110a, and force the ambient air to pass through the condenser 105 and the compressor 104, and then flow from the fan outlet to the bottom of the box body and flow forward into the surrounding environment.

[0059] In this embodiment, by defining a first bottom opening 110a on the bottom wall of the box body and using a specially arranged centrifugal fan 106 to form a heat dissipation airflow circulation below the bottom wall of the box body, there is no need to increase the distance between the back of the built-in refrigerator 100 and the cabinet, thereby reducing the space occupied by the refrigerator 100 and ensuring the refrigeration effect of the built-in refrigerator 100.

[0060] In addition, the heat dissipation fan adopts a centrifugal fan 106, and the centrifugal fan 106 is arranged on one lateral side of the first bottom opening 110a. Compared with the scheme of adopting an axial flow fan as a heat dissipation fan and arranging the compressor 104, the axial flow fan, and the condenser 105 in sequence in the lateral direction, in this embodiment, the centrifugal fan 106 is located at the front side of the compressor cabin 180, and is not in the same lateral direction as the compressor 104 and the condenser 105, which can reduce the lateral width of the compressor cabin 180, so that the refrigerator 100 can be applied to a smaller platform, and when it is necessary to compress the width direction space, it can still ensure that the compressor cabin 180 has good heat dissipation performance.

[0061] Further in particular, the refrigerator 100 also includes a wind shield 107 extending forward and backward, and the wind shield 107 is configured to isolate the space below the bottom wall of the box body connected to the fan outlet and the first bottom opening, so as to laterally separate the space between the bottom wall of the refrigerator 100 and the supporting surface when the refrigerator 100 is placed on a supporting surface, thereby avoiding the airflow in the space on the horizontal left side of the wind shield 107 and the airflow in the space on the horizontal right side of the wind shield 107 from flowing into each other.

[0062] In some embodiments, the bottom wall of the box body further defines a second bottom opening 110b located on a lateral side of the first bottom opening 110a. Figure 5 and Figure 7 As shown, the first bottom opening 110a is located below the front side of the condenser 105, and the second bottom opening 110b is located below the front side of the compressor 104; in the second embodiment, as shown Figure 6 As shown, the first bottom opening 110 a is located below the front side of the compressor 104 , and the second bottom opening 110 b is located below the front side of the condenser 105 .

[0063] like Figure 7As shown, the centrifugal fan 106 is arranged at the second bottom opening 110b in an upward tilted manner from front to back, a fan inlet 106a is formed on the lower surface of the centrifugal fan 106, and a fan outlet 106b communicating with the space below the bottom wall of the box is formed on the front face of the centrifugal fan 106.

[0064] In an embodiment where the first bottom opening 110a is located below the front side of the condenser 105 and the second bottom opening 110b is located below the front side of the compressor 104, as shown in FIG. Figure 5 As shown, Figure 5 The dashed arrows in the middle show the air circulation path. The centrifugal fan 106 is configured to force the first bottom opening 110a to inhale ambient air, and force the ambient air to flow through the condenser 105 and the compressor 104 in sequence, and then flow forward from the fan outlet 106b to the surrounding environment.

[0065] In an embodiment where the first bottom opening 110a is located below the front side of the compressor 104 and the second bottom opening 110b is located below the front side of the condenser 105, as shown in FIG. Figure 6 As shown, Figure 6 The dashed arrows in the middle show the air circulation path. The centrifugal fan 106 is configured to force the first bottom opening 110a to inhale ambient air, and force the ambient air to flow through the compressor 104 and the condenser 105 in sequence, and then flow forward from the fan outlet 106b to the surrounding environment.

[0066] In an embodiment in which the bottom wall of the box body is defined by a first bottom opening 110a and a second bottom opening 110b, the wind shield 107 should be configured to isolate the first bottom opening 110a from the second bottom opening 110b, so that when the refrigerator 100 is placed on a supporting surface, the space between the bottom wall of the box body and the supporting surface is laterally separated to avoid the airflow in the space on the horizontal left side of the wind shield 107 and the airflow in the space on the horizontal right side of the wind shield 107, thereby ensuring heat dissipation efficiency.

[0067] In the third embodiment, if Figure 3 As shown, there are two wind shields 107, which are arranged on the lower surface of the bottom wall of the box body along a lateral interval, and are arranged to separate an arrangement space between the first bottom opening 110a and the second bottom opening 110b. The wind shield 107 adjacent to the first bottom opening 110a is arranged to isolate the first bottom opening 110a from the arrangement space, and the wind shield 107 adjacent to the second bottom opening 110b is arranged to isolate the second bottom opening 110b from the arrangement space.

[0068] The centrifugal fan 106 is arranged in the arrangement space, such as Figure 8 As shown, Figure 8The dashed arrows in the middle show the air circulation path. The centrifugal fan 106 is configured to inhale ambient air from the first bottom opening 110a and the second bottom opening 110b, causing the ambient air to pass through the condenser 105 and the compressor 104, and then flow forward from the fan outlet 106b to the surrounding environment.

[0069] In some embodiments, Figure 4 As shown, both lateral side walls of the compressor compartment 180 are formed with side ventilation holes 119a, and under the drive of the centrifugal fan 106, the ambient air around the side ventilation holes 119a enters the compressor compartment 180. When the refrigerator 100 is used as a non-embedded refrigerator, the refrigerator 100 has a certain airflow circulation space on both lateral sides, and under the drive of the centrifugal fan 106, the ambient air in the space can enter the compressor compartment 180 through the side ventilation holes 119a, thereby increasing the heat dissipation airflow and further improving the heat dissipation efficiency of the compressor compartment 180.

[0070] like Figure 1 , Figure 2 As shown, the outer shell 110 includes two box side panels 111 in the transverse direction, and the two box side panels 111 extend vertically to constitute two side walls of the refrigerator 100. The two box side panels 111 respectively form a side opening 111a connected to the corresponding side ventilation hole 119a, so that the ambient air on both sides of the refrigerator 100 enters the compressor compartment 180.

[0071] In some embodiments, Figure 4 As shown, the rear wall of the compressor compartment 180 is formed with a first rear ventilation hole 116a in the section corresponding to the compressor 104, and a second rear ventilation hole 116b is formed in the section corresponding to the condenser 105. When the refrigerator 100 is used as a non-embedded refrigerator, the rear part of the refrigerator 100 has a certain air flow space. Under the action of the centrifugal fan 106, the ambient air around the first rear ventilation hole 116a and the second rear ventilation hole 116b enters the compressor compartment 180 to further increase the heat dissipation airflow and enhance the heat dissipation effect of the compressor compartment.

[0072] like Figure 3 As shown, specifically, the housing 110 further includes a bottom plate, a support plate 112, two side plates 119 and a vertically extending back plate 116. The support plate 112 constitutes the bottom wall of the compressor cabin 180, and is used to carry the compressor 104 and the condenser 105. The two side plates 119 respectively constitute the two lateral side walls of the compressor cabin 180, and the vertically extending back plate 116 constitutes the rear wall of the compressor cabin 180. The compressor 104 and the condenser 105 are sequentially arranged on the support plate 112 in a spaced manner in the lateral direction.

[0073] More specifically, the bottom plate includes a bottom horizontal section 113 located at the front side of the bottom and a bent section extending backward and upward from the rear end of the bottom horizontal section 113, the bent section extending to the top of the support plate 112, and the support plate 112 and the bottom horizontal section 113 together form the bottom wall of the box. The bent section has an inclined section 114 located above the first bottom opening 110a and the second bottom opening 110b.

[0074] Specifically, the bending section may include the aforementioned inclined section 114 extending obliquely backward and upward from the rear end of the bottom horizontal section 113, a top inclined section 118 extending obliquely backward and upward from the rear end of the inclined section 114, and a top horizontal section 115 extending backward from the rear end of the top inclined section 118. The support plate 112 and the bottom horizontal section 113 are spaced apart to utilize the space between the front end of the support plate 112 and the rear end of the bottom horizontal section 113 to form a bottom opening connected to the external space.

[0075] The compressor 104 and the condenser 105 are arranged on the support plate 112 in sequence and spaced apart in the transverse direction, and are located in a space defined by the support plate 112, two side plates 119, the back plate 116 and the bent section.

[0076] The refrigerator 100 also includes a partition 117, which is arranged behind the bending section. Specifically, the partition 117 is arranged behind the inclined section 114, and the rear portion of the partition 117 is connected to the front end of the support plate 112, and the front portion of the partition 117 is connected to the rear end of the bottom horizontal section 113, thereby separating the spacing space between the support plate 112 and the bottom horizontal section 113 (that is, the aforementioned bottom opening) into a first bottom opening 110a and a second bottom opening 110b.

[0077] The aforementioned windshield strip 107 may extend from the lower surface of the bottom horizontal section 113 to the lower surface of the support plate 112 and connect to the lower end of the partition 117 so as to completely isolate the first bottom opening 110a and the second bottom opening 110b by the windshield strip 107 and the partition 117 .

[0078] In the third embodiment, if Figure 8 As shown ( Figure 8 The partition 117 is not shown. There may be two partitions 117. The two partitions 117 together separate the aforementioned bottom opening into a first bottom opening 110a, a layout space where the centrifugal fan 106 is located, and a second bottom opening 110b, which are distributed in sequence laterally. One of the partitions 117 cooperates with the corresponding wind shield 107 to completely isolate the first bottom opening 110a from the space where the centrifugal fan 106 is located, and the other partition 117 cooperates with the corresponding wind shield 107 to completely isolate the second bottom opening 110b from the layout space where the centrifugal fan 106 is located.

[0079] More specifically, the storage liner 130 defines a cooling space located below and a storage space 132 located just above the cooling space, and the evaporator 101 is arranged in the cooling space.

[0080] In a traditional refrigerator 100, the bottom space of the refrigerator 100 is generally a storage space, which is located at a relatively low position. Users need to bend over or squat significantly to take and put items in the bottom storage space, which is inconvenient for users, especially for the elderly. In addition, since the evaporator occupies the rear area of ​​the bottom storage space, the depth of the bottom storage space is reduced. Furthermore, since the compressor cabin is generally located at the rear of the bottom storage space, the bottom storage space inevitably has to make way for the compressor cabin, resulting in the bottom storage space being irregular in shape, which is not convenient for storing large items that are difficult to divide.

[0081] In the refrigerator 100 of this embodiment, the bottom space of the refrigerator 100 is the cooling space, which raises the height of the storage space 132 located above the cooling space, reduces the degree of bending when the user takes out and puts items in the storage space 132, and improves the user's experience. In addition, the depth of the storage space 132 is guaranteed, and the press cabin can be located at the lower rear of the storage space 132. The storage space 132 does not need to make way for the press cabin, presenting a large and regular rectangular space, which is convenient for placing large and difficult to divide items, solving the pain point that large items cannot be placed in the storage space 132.

[0082] The evaporator 101 cools the airflow entering the cooling space to form a cooling airflow, and at least part of the cooling airflow is transported to the storage space 132 through the air supply duct 141. The air supply duct 141 can be arranged on the inner side of the rear wall of the storage liner 130 and communicated with the cooling space. Figure 2 As shown, the air supply duct 141 is formed with a plurality of air supply outlets 141 a communicating with the storage space 132 .

[0083] In such Figure 2 In the illustrated embodiment, the refrigerator 100 also includes a variable temperature air duct (not shown) for delivering cooling air flow to the variable temperature space. The variable temperature air duct and the air supply duct 141 can be controllably connected via a variable temperature air door (not shown) to guide part of the cooling air flow in the air supply duct 141 into the variable temperature air duct.

[0084] In such Figure 1 He Ru Figure 2In the illustrated embodiment, the refrigerator 100 may further include a refrigeration duct (not shown) for conveying cooling airflow to the refrigerated space, and the refrigeration duct may be controllably connected to the air supply duct 141 through a refrigeration air door to guide part of the cooling airflow of the air supply duct 141 into the refrigeration duct. In some alternative embodiments, another evaporator may be arranged in the refrigeration liner 120 to cool the refrigerated space 121 by air cooling or direct cooling, so as to form a refrigerator 100 with a dual refrigeration system to prevent odor from being mixed between the storage space 132 and the refrigerated space 121.

[0085] In some embodiments, the blower for accelerating the airflow may be located behind the evaporator 101, with its air outlet connected to the air inlet of the air supply duct 141, and configured to force the cooling airflow into the air supply duct 141 to accelerate the airflow circulation and increase the refrigeration speed. The blower may be a centrifugal blower, an axial flow blower or a cross flow blower.

[0086] The refrigerator 100 further includes at least one return air cover 102 , which is disposed at the front end of the top cover 103 and defines the aforementioned cooling space together with the top cover 103 and the bottom wall of the storage liner 130 .

[0087] like Fig. 9 As shown, each return air hood 102 includes a return air frame 1021 and a return air rear cover 1022 located at the front side, the front wall of the return air frame 1021 is formed with a first front opening 102c, and the rear end is open, the return air rear cover 1022 is inserted into the return air frame 1021 from the rear end opening of the return air frame 1021, and is configured to separate the first front opening 102c into a first front return air inlet 102b located at the top and a second front return air inlet 102a located at the bottom, so as to facilitate the return air of the storage space 132 to flow back to the cooling space through the first front return air inlet 102b and the second front return air inlet 102a, and be cooled by the evaporator 101, thereby forming an air flow circulation between the storage space 132 and the cooling space.

[0088] In the present embodiment, two return air inlets (a first front return air inlet 102b and a second front return air inlet 102a) are formed on the front side of the return air hood 102, which are not only visually pleasing, but also can effectively prevent children's fingers or foreign objects from entering the cooling space; and, the two return air areas distributed up and down can make the return air flow through the evaporator 101 more evenly after entering the cooling space, which can avoid the problem of easy frost on the front end surface of the evaporator 101 to a certain extent, which can not only improve the heat exchange efficiency, but also extend the defrost cycle, saving energy and being efficient.

[0089] There can be two return air hoods 102, which are spaced apart laterally. A vertical beam (not shown) is provided between the two return air hoods 102, and the vertical beam extends vertically upward to the top wall of the storage liner 130 to separate the front side of the storage liner 130 into two laterally distributed areas.

[0090] Two double-door bodies (not shown) may be provided on the front side of the storage liner 130 , and the two doors are used to open and close two areas separated by the vertical beams.

[0091] In particular, if Figures 9 to 11 As shown, the return air frame 1021 includes a first guide oblique section 1021a extending rearward and upward from the upper end of the front wall of the return air frame 1021, and a second guide oblique section 1021c extending rearward and downward from the position of the front wall of the return air frame 1021 near the lower end; the return air rear cover 1022 includes a third guide oblique section 1022a extending from back to front and forward and downward, a fourth guide oblique section 1022b extending forward and downward from the lower end of the third guide oblique section 1022a, a fifth guide oblique section 1022c extending rearward and downward from the front end of the fourth guide oblique section 1022b, and a sixth guide oblique section 1022d extending rearward and downward from the lower end of the fifth guide oblique section 1022c.

[0092] See also Fig.11 As shown, the first guide oblique section 1021a, the third guide oblique section 1022a and the fourth guide oblique section 1022b define a first return air duct (not numbered) located behind the first front return air inlet 102b, and the third guide oblique section 1022a is formed with a second rear opening 102d. The return air entering from the first front return air inlet 102b enters the cooling space through the first return air duct and the second rear opening 102d, enters the evaporator 101 from the upper section of the evaporator 101 and exchanges heat with the evaporator 101. The second guide oblique section 1021c and the sixth guide oblique section 1022d define a second return air duct (not numbered) located behind the second front return air inlet 102a. The return air entering from the second front return air inlet 102a enters the cooling space through the second return air duct, enters the evaporator 101 from the lower section of the evaporator 101 and exchanges heat with the evaporator 101.

[0093] like Fig.11 As shown, Fig.11 The dotted arrows in the figure schematically indicate the return air flow path. The return air enters the cooling space through the upper and lower return air ducts, so that the return air passes through the evaporator 101 more evenly, improving the heat exchange efficiency. In addition, the design of each inclined section of the return air frame 1021 and the design of each inclined section of the return air rear cover 1022 guide the condensed water condensed on the return air cover 102 for easy drainage.

[0094] like Fig. 9 As shown, the second rear opening 102 d is in a vertical strip shape, and a plurality of second rear openings 102 d are sequentially distributed in the transverse direction to disperse the return air so that the return air enters the upper section of the evaporator 101 more evenly.

[0095] The sixth guide section 1022d may be formed with a plurality of third openings (not shown) distributed in sequence in the transverse direction. The return air passing through the second return air channel is diverted by each third opening and then enters the cooling space, so that the return air enters the lower section of the evaporator 101 more evenly.

[0096] like Fig.11 , and see Figure 2 As shown, the lower surface of the top cover 103 is spaced apart from the upper surface of the evaporator 101, and the front end of the top cover 103 is located above and behind the front end of the evaporator 101, that is, the top cover 103 does not completely cover the upper surface of the evaporator 101, and the front section of the upper surface of the evaporator 101 is not blocked by the top cover 103.

[0097] The return air rear cover 1022 also includes a shielding portion (referred to as the first shielding portion 1022e) extending rearward and upward from the third guide inclined section 1022a to the front end of the top cover 103. The first shielding portion 1022e is configured to shield the section of the upper surface of the evaporator 101 that is not shielded by the top cover 103, and the first shielding portion 1022e is spaced from the upper surface of the evaporator 101 to form an airflow bypass connected to the second rear opening 102d. At least part of the return air entering through the second rear opening 102d can enter the evaporator 101 from above the evaporator 101 via the airflow bypass.

[0098] The space facing each other between the top cover 103 and the upper surface of the evaporator 101 is filled with windproof foam, that is, the rear of the airflow bypass is filled with windproof foam, so that the return air passing through the airflow bypass flows into the evaporator 101. This ensures that even when the front end of the evaporator 101 is frosted, the return air still enters the evaporator 101 to exchange heat with it, thereby ensuring the refrigeration effect of the evaporator 101, solving the problem of reduced refrigeration effect of the existing refrigerator 100 due to frosting on the front end of the evaporator 101, and improving the refrigeration performance of the refrigerator 100.

[0099] like Fig. 9 and Fig.11 As shown, the return air frame 1021 also includes a second shielding portion 1021b that bends backward and upward from the first guide inclined section 1021a and extends to the top cover 103. The second shielding portion 1021b completely shields the first shielding portion 1022e to maintain the beautiful appearance of the return air cover 102.

[0100] See more particularly Fig.11, the connection point C between the fourth guide slope 1022b and the fifth guide slope 1022c is located directly below the first guide slope 1021a, and the condensed water formed on the return air frame 1021 drips downward along the inclined surface of the first guide slope 1021a to the connection point C between the fourth guide slope 1022b and the fifth guide slope 1022c directly below (that is, the corner between the fourth guide slope 1022b and the fifth guide slope 1022c), and then drips along the inclined surface of the fifth guide slope 1022c to the second guide slope 1021c, and then flows to the bottom of the evaporator 101. The bottom of the evaporator 101 generally has a water receiving area, and the water receiving area is formed with a drain port to discharge the condensed water. In this way, the condensed water formed on the return air cover 102 is guided and discharged, avoiding the generation of water droplets perceptible to the human ear, and improving the user experience.

[0101] The bottom wall of the storage liner 130 may be formed with a water receiving section located below the evaporator 101. The projection of the water receiving section on the vertical plane parallel to the side wall of the storage liner 130 includes a front flow guiding inclined section 133 extending backward and downward at the front side, a horizontal straight section 134 extending horizontally backward from the front flow guiding inclined section 133, and a rear flow guiding inclined section 135 extending backward and upward from the rear end of the horizontal straight section 134. The horizontal straight section 134 is formed with a drain port (not shown). The condensed water formed on the return air cover 102 flows along the front flow guiding inclined section 133 to the horizontal straight section 134 through the guidance of the various inclined sections of the return air frame 1021 and the return air rear cover 1022, and is finally discharged from the drain port. The condensed water on the evaporator 101 flows along the front flow guiding inclined section 133 and the rear flow guiding inclined section 135 to the horizontal straight section 134, and is discharged from the drain port.

[0102] The drain port is connected to a drain pipe (not shown), through which the condensed water is guided to an evaporating dish of the refrigerator 100. The evaporating dish may generally be located in a compressor compartment to evaporate the water in the evaporating dish using the heat of a condenser and / or a compressor arranged in the compressor compartment.

[0103] 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 recognized as covering all these other variations or modifications.

Claims

1. A refrigerator using a centrifugal fan for heat dissipation, comprising: A box body, the bottom of which defines a compressor cabin, in which a compressor and a condenser are distributed in a lateral interval, and the bottom wall of the box body defines a first bottom opening located at the front side of the compressor cabin; a centrifugal fan, arranged at a lateral side of the first bottom opening, having a fan outlet communicating with the space below the bottom wall of the box, configured to inhale ambient air from the first bottom opening, and force the ambient air to pass through the condenser and the compressor, and then flow from the fan outlet to below the bottom wall of the box and flow forward to the surrounding environment; The bottom wall of the box body further defines a second bottom opening located on a lateral side of the first bottom opening; The centrifugal fan is arranged at the second bottom opening in an upwardly inclined manner from front to back, a fan inlet is formed on the lower surface of the centrifugal fan, and a fan outlet is formed on the front end surface of the centrifugal fan, which is communicated with the space below the bottom wall of the box body; The box body comprises a bottom plate and a supporting plate; The support plate constitutes the bottom wall of the compressor cabin, and the compressor and the condenser are arranged on the support plate in sequence and at intervals in the transverse direction; The bottom plate includes a bottom horizontal section located at the front side of the bottom and a bent section extending backward and upward from the rear end of the bottom horizontal section; the bent section has an inclined section located above the first bottom opening and the second bottom opening.

2. The refrigerator according to claim 1, wherein The first bottom opening is located below the front side of the condenser, and the second bottom opening is located below the front side of the compressor; or the first bottom opening is located below the front side of the compressor, and the second bottom opening is located below the front side of the condenser.

3. The refrigerator according to claim 2, further comprising: A wind shield extending forward and backward is arranged on the lower surface of the bottom wall of the box body and is arranged to isolate the first bottom opening from the second bottom opening, so as to laterally separate the space between the bottom wall of the box body and the supporting surface when the refrigerator is placed on a supporting surface.

4. The refrigerator according to claim 3, wherein There are two windshield strips, which are arranged on the lower surface of the bottom wall of the box body at intervals in the transverse direction, and are arranged to separate a layout space between the first bottom opening and the second bottom opening. The windshield strip adjacent to the first bottom opening is arranged to isolate the first bottom opening from the layout space, and the windshield strip adjacent to the second bottom opening is arranged to isolate the second bottom opening from the layout space. The centrifugal fan is arranged in the arrangement space and is configured to inhale ambient air from the first bottom opening and the second bottom opening, causing the ambient air to pass through the condenser and the compressor, and then flow from the fan outlet to the bottom of the bottom wall of the box and flow forward to the surrounding environment.

5. The refrigerator according to claim 1, further comprising: A storage liner is located in the upper front of the compressor cabin, and the storage liner defines a cooling space located below and a storage space located directly above the cooling space; The evaporator is disposed in the cooling space and is configured to cool the airflow entering the cooling space so as to provide cooling airflow to at least the storage space.

6. The refrigerator according to claim 5, further comprising: A top cover, which is inside the storage liner and divides the storage liner into the storage space located above and the cooling space located below; At least one return air cover, disposed at the front end of the top cover, and defining the cooling space together with the top cover and the bottom wall of the storage liner; The return air hood comprises: The return air frame body located at the front side has a first front opening formed on the front wall surface and an open rear end; The return air rear cover is inserted into the return air frame through the rear end opening of the return air frame, and is configured to separate the first front opening into a first front return air inlet located above and a second front return air inlet located below, so as to facilitate the return air of the storage space to flow back into the cooling space through the first front return air inlet and the second front return air inlet.

7. The refrigerator according to claim 6, wherein The return air frame comprises a first guide oblique section extending from the upper end of the front wall surface of the return air frame toward the rear and upward, and a second guide oblique section extending from the position of the front wall surface of the return air frame toward the rear and downward; The return air rear cover includes a third guide oblique section extending from back to front to front and downward, a fourth guide oblique section extending from the lower end of the third guide oblique section to the front and downward, a fifth guide oblique section extending from the front end of the fourth guide oblique section to the rear and downward, and a sixth guide oblique section extending from the lower end of the fifth guide oblique section to the rear and downward; Furthermore, the first guide oblique section, the third guide oblique section and the fourth guide oblique section define a first return air duct located behind the first front return air inlet, and the third guide oblique section is formed with a second rear opening; The second guide oblique section and the sixth guide oblique section define a second return air duct located behind the second front return air inlet.

8. The refrigerator according to claim 7, wherein The connection between the fourth guide slope section and the fifth guide slope section is located directly below the first guide slope section, so that the condensed water condensed on the return air frame can drip along the first guide slope section to the connection between the fourth guide slope section and the fifth guide slope section, and drip along the fifth guide slope section to the second guide slope section, and then flow to the bottom of the evaporator.

9. The refrigerator according to claim 7, wherein The lower surface of the top cover is spaced apart from the upper surface of the evaporator, and the front end of the top cover is located above and behind the front end of the evaporator, so that the top cover does not completely cover the upper surface of the evaporator; The return air rear cover also includes a shielding portion extending backward and upward from the third guide inclined section to the front end of the top cover to shield the section of the upper surface of the evaporator that is not shielded by the top cover; Furthermore, the shielding portion is spaced from the upper surface of the evaporator to form an airflow bypass communicated with the second rear opening, so that at least part of the return air entering through the second rear opening enters the evaporator via the airflow bypass and is cooled by the evaporator.

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