CN111609608A

CN111609608A - Refrigerator with double air supply fans

Info

Publication number: CN111609608A
Application number: CN201910142740.1A
Authority: CN
Inventors: 王晶; 刘建如; 朱小兵; 聂圣源
Original assignee: Qingdao Haier Co Ltd; Qingdao Haier Refrigerator Co Ltd
Current assignee: Qingdao Haier Co Ltd; Qingdao Haier Refrigerator Co Ltd
Priority date: 2019-02-26
Filing date: 2019-02-26
Publication date: 2020-09-01
Anticipated expiration: 2039-02-26
Also published as: CN111609608B; WO2020173361A1

Abstract

The invention provides a refrigerator which comprises a refrigerator body, an evaporator and an air supply fan, wherein a cooling chamber positioned below and at least one storage compartment positioned above the cooling chamber are limited in the refrigerator body, the evaporator is arranged in the cooling chamber, and the air supply fan is positioned at the downstream of the evaporator on an airflow flow path and is configured to promote cooling airflow to flow into the at least one storage compartment. According to the refrigerator, the cooling chamber is positioned at the lower part in the refrigerator body, the lower space in the refrigerator body is occupied, the cooling chamber can be used for offering abdications for the press cabin, the storage chamber does not need to offer abdications for the press cabin, the problem that the refrigerating chamber is special-shaped due to the fact that the refrigerating chamber needs to offer abdications for the press cabin in the existing scheme is solved, and therefore the storage volume of the refrigerating chamber is guaranteed; in addition, the air supply fan is arranged at the downstream of the evaporator, so that the air flow cooled by the evaporator flows to the storage compartment at an accelerated speed, and the refrigeration effect of the refrigerator is ensured.

Description

Refrigerator with double air supply fans

Technical Field

The invention relates to the technical field of household appliances, in particular to a refrigerator with double air supply fans.

Background

In the existing refrigerator, a freezing chamber is generally positioned at the lower part of the refrigerator, an evaporator is positioned at the rear part of the outer side of the freezing chamber, a press chamber is positioned at the rear lower part of the freezing chamber, and the freezing chamber needs to be abducted for the press chamber, so that the freezing chamber has special shape and the depth of the freezing chamber is limited.

In addition, in the prior art, cooling air flow after heat exchange with the evaporator is driven by a single fan, and is divided into multiple paths to be respectively and correspondingly guided to a refrigerating chamber, a freezing chamber, a temperature changing chamber and the like in the refrigerator. The temperature in each compartment is controlled by controlling the opening and closing time of each air duct, and the temperature control mode is often not accurate enough, so that the temperatures of the refrigerating chamber and the freezing chamber always fluctuate within a certain range.

Disclosure of Invention

In view of the above, it is an object of the present invention to provide a refrigerator having a dual blower fan which overcomes or at least partially solves the above problems.

A further object of the present invention is to improve the air supply efficiency and to precisely control the refrigerating effect of the refrigerator.

The present invention provides a refrigerator, including:

a box body, wherein a cooling chamber positioned at the lower part, a temperature change chamber positioned at the upper part of the cooling chamber and a freezing chamber are defined in the box body;

an evaporator disposed within the cooling chamber and configured to cool an airflow entering the cooling chamber to form a cooled airflow;

a first fan disposed in the cooling chamber and configured to cause a cooling airflow to flow to the temperature-changing chamber;

and the second fan is arranged in the cooling chamber and is configured to promote the cooling airflow to flow to the freezing chamber.

Furthermore, the refrigerator also comprises an air supply duct, wherein the air supply duct comprises a first air duct for supplying air to the temperature-changing chamber and a second air duct for supplying air to the freezing chamber;

along the flowing direction of the cooling air flow, the first fan and the second fan are both arranged at the downstream of the evaporator, the first fan is configured to supply air to the first air duct, and the second fan is configured to supply air to the second air duct.

Further, the first fan is an axial flow fan, and the first fan conveys cooling air flow to the obliquely upper part along the flowing direction of the cooling air flow;

the second fan is an axial flow fan, and the first fan conveys cooling air flow obliquely upwards along the flowing direction of the cooling air flow.

Furthermore, the included angle between the rotation axis of the first fan and the horizontal plane is 5-60 degrees;

the included angle between the rotation axis of the second fan and the horizontal plane is 5-60 degrees.

Furthermore, the box body also comprises a cooling chamber arranged above the cooling chamber, the temperature range of the cooling chamber is configured to cover the temperature range of the freezing chamber and the temperature range of the temperature-variable chamber, and the air supply duct comprises a third air duct for supplying air to the cooling chamber;

and a first air adjusting door for controlling the opening and closing of the third air channel is arranged in the third air channel, and the first fan is configured to supply air to the first air channel and the third air channel simultaneously.

Furthermore, the box body comprises a freezing inner container positioned at the lowest part, and a cooling chamber is defined in the freezing inner container;

the freezing inner container is also internally provided with a freezing chamber positioned above the cooling chamber and a cooling chamber arranged above the freezing chamber.

Further, at least one front return air inlet communicated with the freezing chamber is formed at the front side of the cooling chamber, so that return air flow of the freezing chamber enters the cooling chamber through the at least one front return air inlet for cooling.

Further, the refrigerator further includes:

the top cover is positioned above the evaporator;

at least one front cover group, wherein at least one front return air inlet is formed at the front side of each front cover group;

the top cover, the at least one front cover group and the rear wall, the bottom wall and the two transverse side walls of the freezing inner container jointly define a cooling chamber.

Furthermore, the number of the front return air inlets is two, and the two front return air inlets are respectively marked as a first front return air inlet and a second front return air inlet;

the front cover group includes:

a front trim cover, the front end of which is positioned in front of the front end of the evaporator and is spaced from the front end of the evaporator, the front wall of the front end of which is formed with a first opening, and the rear side of the front end of which is open;

and the front end part of the front air channel cover is positioned at the front end of the evaporator, and the front end part of the front air channel cover is inserted into the front decorative cover forwards from the rear side opening part of the front end part of the front decorative cover so as to divide the first opening into a first front return air inlet positioned below and a second front return air inlet positioned above.

Furthermore, a first return air channel communicated with the first front return air inlet is defined by the bottom wall of the front end part of the front air channel cover and the bottom wall of the front end part of the front decorative cover, and the first return air channel is positioned in front of the evaporator, so that at least part of return air flow entering the first return air channel through the first front return air inlet enters the evaporator from the front of the evaporator and is cooled by the evaporator.

According to the refrigerator, the cooling chamber is positioned at the lower part in the refrigerator body, the lower space in the refrigerator body is occupied, the cooling chamber can be used for offering abdications for the press cabin, the storage chamber does not need to offer abdications for the press cabin, the problem that the refrigerating chamber is specially-shaped due to the fact that the refrigerating chamber needs to offer abdications for the press cabin in the existing scheme is avoided, and therefore the storage volume of the refrigerating chamber can be guaranteed.

Furthermore, in the refrigerator, the first fan is used for supplying air to the temperature changing chamber, and the second fan is used for supplying air to the freezing chamber. So that the cooling air flow delivered in the freezing chamber and the refrigerating chamber can be controlled independently, and the temperature of the freezing chamber and the refrigerating chamber can be adjusted accurately.

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

Drawings

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

fig. 1 is a schematic perspective view of a refrigerator according to a first embodiment of the present invention;

fig. 2 is a schematic perspective view of a refrigerator according to a first embodiment of the present invention, in which a refrigerating chamber door body, a temperature-changing drawer, and a freezing drawer are hidden;

fig. 3 is a schematic view of a refrigerator according to a first embodiment of the present invention, in which a refrigerating compartment door body, a temperature varying drawer, a freezing drawer, and a cover plate are hidden to show an evaporator and a blowing fan provided in a cooling compartment;

fig. 4 is a schematic view of a refrigerator according to a second embodiment of the present invention, in which a door body and the like are hidden;

FIG. 5 is a schematic view of the freezing liner and its internal components of a refrigerator according to a second embodiment of the present invention, wherein the top cover of the hood plate is hidden to show the blower fan;

fig. 6 is a partial schematic view of a refrigerator according to a first embodiment of the present invention;

fig. 7 is a partial schematic view of a refrigerator according to a second embodiment of the present invention; and

FIG. 8 is an exploded schematic view of FIG. 7;

FIG. 9 is a perspective view of a freezing chamber and its internal components of a refrigerator according to a third embodiment of the present invention;

FIG. 10 is a schematic sectional view of a freezing inner container and its internal components of a refrigerator according to a third embodiment of the present invention;

fig. 11 is an exploded schematic view of a partial element of a freezing inner container of the refrigerator according to the third embodiment of the present invention;

fig. 12 is a front view schematically showing partial elements of a freezing inner container of a refrigerator according to a third embodiment of the present invention.

Detailed Description

The present embodiment provides a refrigerator 10, and the refrigerator 10 of the embodiment of the present invention is described below with reference to fig. 1 to 12. In the following description, the orientations or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", and the like are orientations based on the refrigerator 10 itself as a reference, and "front" and "rear" are directions indicated in fig. 1 and 6, as shown in fig. 1, "lateral" means a left-right direction, and means a direction parallel to the width direction of the refrigerator 10.

Fig. 1 is a schematic external view of a refrigerator 10 according to a first embodiment of the present invention, fig. 2 is a schematic view of the refrigerator 10 according to the first embodiment of the present invention, in which a refrigerating chamber door 136, a temperature-changing drawer, and a freezing drawer are hidden, fig. 3 is a schematic view of the refrigerator 10 according to the first embodiment of the present invention, in which the refrigerating chamber door 136, the temperature-changing drawer, the freezing drawer, and a cover plate 102 are hidden to show an evaporator 101 and a blowing fan 103 provided in a cooling chamber, and fig. 4 is a schematic view of the refrigerator 10 according to a second embodiment of the present invention, in which parts such as the doors are hidden.

As shown in fig. 1 to 4, the refrigerator 10 may generally include a cabinet 100, the cabinet 100 including a housing and a storage liner disposed inside the housing, a space between the housing and the storage liner being filled with a heat insulating material (forming a foaming layer), the storage liner defining therein a storage compartment, which may generally include a freezing liner 130, a refrigerating liner 120, and the like, the storage compartment including a freezing chamber 132 defined within the freezing liner 130 and a refrigerating chamber 121 defined within the refrigerating liner 120.

In the first embodiment, as shown in fig. 2 to 3 in combination with fig. 1, the freezing liner 130 further defines a temperature-changing chamber 131 above the freezing chamber 132, and the temperature-changing chamber 131 and the freezing chamber 132 are both drawer-type structures. A refrigerating chamber door 136 is provided at a front side of the refrigerating chamber 121 to open or close the refrigerating chamber 121, a variable temperature chamber drawer door 137 is provided at a front side of the variable temperature chamber 131 to open or close the variable temperature chamber 131, and a freezing chamber drawer door 138 is provided at a front side of the freezing chamber 132 to open or close the freezing chamber 132.

As is well known to those skilled in the art, the temperature within the refrigerated compartment 121 is generally between 2 ℃ and 10 ℃, preferably between 4 ℃ and 7 ℃. The temperature in the freezer compartment 132 is typically in the range of-22 c to-14 c. The temperature-changing chamber 131 can be adjusted to-18 ℃ to 8 ℃ at will. The optimum storage temperatures for different kinds of articles are different and the suitable storage locations are different, for example, fruit and vegetable foods are suitable for storage in the refrigerating compartment 121 and meat foods are suitable for storage in the freezing compartment 132.

As those skilled in the art can appreciate, the refrigerator 10 of the present embodiment may further include an evaporator 101, a blower fan 103, a compressor, a condenser, and a throttling element (not shown), etc. The evaporator 101 is connected to a compressor, a condenser, and a throttle element via refrigerant lines to form a refrigeration cycle, and is cooled when the compressor is started to cool air flowing therethrough.

In particular, in the present embodiment, the cabinet 100 defines therein a cooling chamber located below, the evaporator 101 is disposed in the cooling chamber, and all the storage compartments are located above the cooling chamber. In the first embodiment, as shown in fig. 2 to 3, the freezing inner container 130 is located at a lower portion of the cabinet 100, and the aforementioned cooling chamber and a freezing chamber 132 located directly above the cooling chamber and a warming chamber 131 located directly above the freezing chamber 132 are defined therein. In the second embodiment, as shown in fig. 4, the freezing inner container 130 defines therein the aforementioned cooling chamber and a freezing chamber 132 located immediately above the cooling chamber. In this embodiment, the temperature-changing chamber 131 is defined by two temperature-changing liners above the freezing liner 130, and each temperature-changing liner defines one temperature-changing chamber 131.

In the conventional refrigerator, the freezing chamber 132 is generally located at the lowest portion of the refrigerator 10, so that the freezing chamber 132 is located at a lower position, and a user needs to bend down or squat down greatly to perform an operation of taking and placing articles in the freezing chamber 132, which is inconvenient for the user to use, especially for the elderly. Furthermore, the freezing chamber 132 needs to be set aside for the press chamber, and the freezing chamber 132 inevitably needs to be made into a special-shaped space for the set aside of the press chamber, reducing the storage capacity of the freezing chamber 132.

In the embodiment, the cooling chamber is limited below the storage chamber, so that the cooling chamber occupies the lower space of the box body 100, the height of the freezing chamber 132 is raised, the stooping degree of a user when the user takes and places articles in the freezing chamber 132 is reduced, and the use experience of the user is improved; moreover, the cooling chamber can provide a yield for the press cabin, and the freezing chamber 132 does not need to provide a yield for the press cabin any more, so that the problem that the freezing chamber 132 is irregular due to the fact that the freezing chamber 132 needs to provide a yield for the press cabin in the existing scheme is solved, and the depth and the storage volume of the freezing chamber 132 can be guaranteed. In addition, the air supply fan 103 is arranged at the downstream of the evaporator 101, so that the air flow cooled by the evaporator 101 is accelerated to flow to the storage compartment, and the refrigeration effect of the refrigerator 10 is ensured.

Fig. 5 is a schematic view of the freezing chamber 130 and its internal components of the refrigerator 10 according to the second embodiment of the present invention, in which the top cover 1021 of the hood plate 102 is hidden to show the blower fan 103, and fig. 6 is a partial schematic view of the refrigerator 10 according to the first embodiment of the present invention.

As shown in fig. 3, 5 and 6, the supply air fan 103 is located downstream of the evaporator 101 in the airflow path, and is configured to cause the cooling air cooled by the evaporator 101 to flow into at least one storage compartment. The air supply fan 103 may be a centrifugal fan, and the air supply fan 103 is disposed in the cooling chamber and behind the evaporator 101, and is disposed to be inclined upward from front to back. That is, the front end of the air supply fan 103 is lower than the rear end, so that the air supply fan 103 as a whole assumes a posture of being inclined rearward. Therefore, the arrangement height of the air supply fan 103 is reduced, and the height space occupied by the air supply fan 103 is reduced, so that the height space occupied by the cooling chamber is reduced, and the storage volume of the storage compartment on the upper part of the cooling chamber is ensured.

The evaporator 101 is disposed in the cooling chamber in a flat cubic shape as a whole, that is, the long and wide faces of the evaporator 101 are parallel to the horizontal plane, the thickness face is disposed perpendicular to the horizontal plane, and the thickness dimension is significantly smaller than the length dimension of the evaporator 101. By placing the evaporator 101 horizontally in the cooling chamber, the evaporator 101 is prevented from occupying more space, and the storage volume of the freezing chamber 132 above the cooling chamber is ensured.

The blower fan 103 includes a housing 1031 and an impeller 1032 disposed in the housing 1031, the housing 1031 extends obliquely upward from front to back, an air inlet is formed on the upper surface of the housing 1031, and an air outlet is formed on the rear end of the housing 1031. The inclination direction of the impeller 1032 is parallel to the inclination direction of the housing 1031, that is, the rotation axis of the impeller 1032 is perpendicular to the upper surface of the housing 1031, so that the air outlet path of the housing 1031 behind the impeller 1032 is substantially parallel to the impeller 1032, thereby avoiding the wind from being caught at the air outlet of the air supply fan 103, ensuring the air supply efficiency and reducing the airflow flowing noise.

As shown in fig. 6, the angle β 1 between the upper surface of the housing 1031 and the vertical plane is 55 ° to 70 °, and it is also understood that the angle β 2 between the rotation axis of the impeller 1032 and the vertical line is 20 ° to 35 °, for example, β 2 may be 20 °, 25 °, 30 °, 33 °, or 35 °. By thus arranging the air supply fan 103, the air flow loss is reduced to the maximum extent while the height space occupied by the air supply fan 103 is reduced, so that the air supply efficiency is further ensured while the compactness of the spatial layout is ensured.

The horizontal distance α between the front end surface of the housing 1031 and the rear end surface of the evaporator 101 is 15 mm to 35 mm, for example, α may be 15 mm, 20 mm, 25 mm, 30 mm or 35 mm, so as to avoid frosting of the air supply fan 103 due to an excessively small distance between the air supply fan 103 and the evaporator 101.

The second embodiment is different from the first embodiment in that the housing 1031 has a spiral duct to reduce airflow noise.

The refrigerator 10 further includes an air supply duct 141, the air supply duct 141 is communicated with an air outlet of the cabinet of the air supply fan 103, and the air supply fan 103 causes cooling air to flow into at least one storage compartment through the air supply duct 141. In the first embodiment, as shown in fig. 3, the freezing compartment 130 is defined with a freezing compartment 132 located above the cooling compartment and a warming compartment 131 located above the freezing compartment 132, and the air supply duct 141 has a first air supply outlet communicating with the freezing compartment 132 and a second air supply outlet communicating with the warming compartment 131. In the second embodiment, as shown in fig. 4 and 5, the freezing inner container 130 only defines the freezing chamber 132 above the cooling chamber, and the air supply duct 141 has a first air supply outlet communicating with the freezing chamber 132.

Fig. 7 is a partial schematic view of a refrigerator 10 according to a second embodiment of the present invention, and fig. 8 is an exploded schematic view of fig. 7.

As shown in fig. 2, 4 to 8, the front side of the cooling compartment is formed with at least one front return air inlet communicating with the freezing compartment 132, so that the return air flow of the freezing compartment 132 enters the cooling compartment through the at least one front return air inlet for cooling.

The refrigerator 10 also includes a cover panel 102, with the front side of the cover panel 102 being formed with the aforementioned at least one front return air inlet. In the first embodiment of the present invention, as shown in fig. 1, as shown in fig. 2, the rear portion of the hood plate 102 is open, the hood plate 102 is fastened to the bottom of the freezing container 130 and defines a cooling compartment together with the rear wall, the bottom wall and the two lateral side walls of the freezing container 130, and the front side of the hood plate 102 is formed with a front return air inlet 102 a.

In the first embodiment, as shown in fig. 6, the refrigerator 10 further includes a duct cover 139 stepped from front to rear, and the duct cover 139 is located below the upper surface of the hood plate 102 and is disposed at the upper portion of the evaporator 101. The air duct cover plate 139 comprises a front plate section 139a, a transition plate section 139c and a rear plate section 139b which are sequentially connected from front to back, the front plate section 139a and the upper surface of the evaporator 101 are arranged at intervals to form an air flow channel between the front plate section 139a and the upper surface of the evaporator 101, the rear plate section 139b is attached to the upper surface of the evaporator 101, and the situation that the return air flow directly flows backwards without passing through the evaporator 101 due to the interval between the rear plate section 139b and the upper surface of the evaporator 101 is avoided.

The space between the duct cover 139 and the upper surface of the shroud 102 should be filled with a wind blocking foam 139d so that the return air flow cannot enter the space between the duct cover 139 and the upper surface of the shroud 102, thereby preventing a portion of the return air flow from entering the space between the duct cover 139 and the upper surface of the shroud 102 without passing through the evaporator 101.

A part of the return air flow entering the cooling compartment enters the evaporator 101 through the front of the front end surface of the evaporator 101 to exchange heat with the evaporator 101, and the other part of the return air flow enters an air flow channel formed by the interval between the front plate section 139a and the upper surface of the evaporator 101 from the upper part of the front end surface of the evaporator 101 and then enters the evaporator 101 from the upper surface of the evaporator 101 to exchange heat with the evaporator 101. This allows the return air flow entering the cooling compartment to enter the evaporator 101 from different directions and different positions, thereby enhancing the cooling effect of the evaporator 101.

In addition, when the external environment humidity is high or the front end surface of the evaporator 101 is abnormally frosted to affect the air intake, the return air can enter the evaporator 101 from the air flow channel between the front plate section 139a and the upper surface of the evaporator 101, so that the frosting is prevented from affecting the heat exchange efficiency of the evaporator 101, and the refrigeration effect of the refrigerator 10 is effectively ensured.

Unlike the first embodiment, in the second embodiment, as shown in fig. 4, the hood panel 102 includes a top cover 1021 positioned above the evaporator and at least one front cover group, each front cover group having the aforementioned at least one front return air inlet formed at a front side thereof, the top cover 1021, the at least one front cover group, and the rear wall, the bottom wall, and the lateral two side walls of the freezing inner container 130 together define a cooling compartment.

The number of the front cover groups can be two, and the two front cover groups are distributed along the transverse direction. Fig. 4, 5, 7 and 8 show only one front cover group on the lateral right side, and the front side of each front cover group is formed with the aforementioned at least one front return air inlet.

As shown in fig. 4, two front return air inlets, which are respectively designated as a first front return air inlet 102a and a second front return air inlet 102b, are formed at the front side of each front cover group.

As shown in fig. 7 and 8, each front cover group includes a front escutcheon 1022 and a front air duct cover 1023, a front end portion 10221 of the front escutcheon 1022 is located in front of a front end of the evaporator 101, the front end portion 10221 is spaced from the front end of the evaporator 101, a front wall of the front end portion 10221 of the front escutcheon 1022 is formed with a first opening 1022a, and a rear side of the front end portion 10221 of the front escutcheon 1022 is open; the front end portion 10231 of the front air duct cover 1023 is located at the front end of the evaporator 101, and the front end portion 10231 of the front air duct cover 1023 is inserted forward into the front trim cover 1022 from the rear side opening of the front end portion 10221 of the front trim cover 1022 to divide the first opening 1022a into a first front return air inlet 102a located below and a second front return air inlet 102b located above.

Specifically, the bottom wall of the front end portion 10231 of the front air duct cover 1023 and the bottom wall of the front end portion 10221 of the front decorative cover 1022 define a first return air passage penetrating the first front return air inlet 102a, and the first return air passage is located in front of the evaporator 101, that is, the front end portion 10231 of the front air duct cover 1023 is inserted into the front decorative cover 1022 from the rear side opening of the front end portion 10221 of the front decorative cover 1022 at a position such that the bottom wall of the front end portion 10231 of the front air duct cover 1023 and the bottom wall of the front end portion 10221 of the front decorative cover 1022 are spaced apart from each other to form a first return air passage penetrating the first front return air inlet 102a, so that at least a part of the return air flow entering the first return air passage through the first front return air inlet 102a enters the evaporator 101 from the front of the evaporator 101 to be cooled by the evaporator 101.

A second opening 1023a penetrating the second front return air inlet 102b is formed in an upper section of the front air duct cover 1023 at the front end 10231, and the second opening 1023a is located above and in front of the evaporator 101. The lower surface of the top cover 1021 is spaced apart from the upper surface of the evaporator 101, and the front end of the top cover 1021 is located above and behind the front end of the evaporator 101, that is, the top cover 1021 does not completely shield the upper surface of the evaporator 101. And, a wind shielding material (not shown) is filled between the lower surface of the top cover 1021 and the upper surface of the evaporator 101, as shown in fig. 8, the top cover 1021 and the upper surface of the evaporator 101 are distributed at an interval to form a space 102c, and the space 102c is filled with a wind shielding material (the filled wind shielding material is hidden in fig. 2), which may be a wind shielding foam.

The front air duct cover 1023 includes a first shielding portion 10232 located at the rear upper side of the second opening 1023a, the rear end of the first shielding portion 10232 abuts against the front end of the top cover 1021 to seal the portion of the upper surface of the evaporator 101 not shielded by the top cover 1021, so that a second return air passage penetrating the second opening 1023a and the second front return air inlet 102b is formed between the first shielding portion 10232 and the upper surface of the evaporator 101, and at least a part of the return air flow entering the second return air passage through the second front return air inlet 102b enters the evaporator 101 from above the evaporator 101 to be cooled by the evaporator.

Since the space 102c between the top cover 1021 and the top surface of the evaporator 101 is filled with a wind shielding material, the return air flow entering the second return air passage is prevented from flowing directly backward without passing through the evaporator 101, so that the return air flow entering the second return air passage flows downward from the top surface of the evaporator 101 into the evaporator 101.

The front cover 1022 includes a second shielding portion 10222 bent and extended from the upper edge of the rear side of the front end portion 10221 to the upper rear side, the second shielding portion 10222 is located above the first shielding portion 10232 and extends to overlap with the upper surface of the top cover 1021 to completely shield the upper side of the first shielding portion 10232, and the shape of the second shielding portion 10222 is matched with the shape of the first shielding portion 10232, so that the second shielding portion 10222 is tightly matched with the first shielding portion 10232 to avoid air leakage.

If the front end face of the evaporator 101 is not frosted or the frosting amount is small, so that the front end face of the evaporator 101 can still pass through the airflow, a part of the return air flow of the freezing chamber 132 enters the first return air channel through the first front return air inlet 102a, a part of the return air flow of the freezing chamber enters the second return air channel through the second front return air inlet 102b, a part of the airflow entering the first return air channel enters the evaporator 101 from the front side of the evaporator 101 (i.e. from the front end face of the evaporator 101), is cooled by the evaporator 101, another part of the airflow entering the first return air channel further flows upwards to the second return air channel, and then flows downwards to the evaporator 101 from the second return air channel, so that a part of the return air flow enters the evaporator 101 from the front side of the evaporator 101, and a part of the return air flow enters the evaporator 101 from the upper side of the evaporator 101, thereby ensuring sufficient heat exchange between the return air flow and the evaporator 101, the refrigerating effect of the refrigerator 10 is improved.

If the front end of the evaporator 101 is frosted more heavily and the airflow cannot enter the evaporator 101, the return air flow of the freezing chamber 132 can enter the second return air channel through the second front return air inlet 102b located above, and then flow downward through the second return air channel, and enter the evaporator 101 from the upper surface of the evaporator 101 for cooling, so that the refrigeration effect of the refrigerator 10 can still be ensured.

In the refrigerator 10 of the embodiment, the structures of the top cover 1021, the front trim cover 1022 and the front air duct cover 1023 are specially designed, so that the heat exchange efficiency between the return air flow of the freezing chamber 132 and the evaporator 101 is ensured, and the refrigeration effect of the refrigerator 10 is improved; moreover, when the front end face of the evaporator 101 frosts, the return air flow can still be ensured to enter the evaporator 101 to be cooled by the evaporator 101, so that the problem that the refrigeration effect is reduced due to frosting of the evaporator 101 in the existing refrigerator 10 is solved, and the overall performance of the refrigerator 10 is improved.

Referring to fig. 6 again, in the refrigerator of this embodiment, the bottom of the box body 100 defines the press cabin, and the press cabin is located behind the cooling chamber, so that the whole press cabin is located below the freezing chamber 132, as before, the freezing chamber 132 does not give way to the press cabin any more, the depth of the freezing chamber 132 is ensured, and articles which have large volume and are not easy to be cut off can be placed conveniently.

The refrigerator 10 further includes a heat dissipation fan 106, the heat dissipation fan 106 may be an axial flow fan, and the compressor, the heat dissipation fan 106, and the condenser (not shown) are arranged in the press compartment at intervals in the transverse direction. The bottom wall of the box 100 defines a bottom air inlet corresponding to the condenser and a bottom air outlet corresponding to the compressor, which are arranged in a transverse direction, and the heat dissipation fan 106 is configured to suck ambient air from the ambient environment of the bottom air inlet and promote the air to flow through the condenser, then through the compressor, and then flow into the ambient environment from the bottom air outlet, so as to dissipate heat from the condenser and the compressor.

The refrigerator 10 of the present embodiment may be disposed in a built-in type for a built-in cabinet to reduce the space occupied by the refrigerator 10. In order to improve the overall aesthetic measure of the refrigerator 10 and reduce the space occupied by the refrigerator 10, the reserved space between the rear wall of the refrigerator 10 and the cabinet is small, which results in low heat dissipation efficiency of the front and rear air inlet and outlet modes adopted in the prior art, and if the heat dissipation is ensured, the distance between the rear wall of the refrigerator 10 and the cabinet must be increased, but at the same time, the space occupied by the refrigerator 10 is increased.

In the refrigerator 10 of the present embodiment, the bottom air inlet and the bottom air outlet which are transversely arranged are defined on the bottom wall of the box body 100, and the heat dissipation airflow circulates at the bottom of the refrigerator 10, so that the space between the refrigerator 10 and the supporting surface is fully utilized, the distance between the rear wall of the refrigerator 10 and the cabinet does not need to be increased, and the heat dissipation efficiency is improved while the space occupied by the refrigerator 10 is reduced.

The four corners of the bottom wall of the box 100 may be provided with support rollers (not shown), and the box 100 is placed on a support surface by the four support rollers, so that a certain space is formed between the bottom wall of the box 100 and the support surface.

In the embodiment shown in fig. 6, only one fan is used for supplying air, so in order to realize that the temperatures in the freezing chamber 132, the refrigerating chamber and the temperature-changing chamber of the refrigerator are all in a specific temperature range, it is necessary to provide dampers in the passages of the air supply duct 141 communicating with the storage chambers, respectively, and to control the temperatures in the storage chambers by controlling the opening time of the dampers. The temperature control method has the following two defects: on the one hand, when all air doors are opened, because the indoor temperature of each storage room is different, the air current that will lead to air supply channel flows disorderly, and the indoor cooling air current of the lower storage room of temperature is easy to the indoor drunkenness of the higher cooling room of temperature, has reduced the indoor cooling rate of the lower storage room of temperature. On the other hand, the air door needs to be opened and closed periodically to ensure that the temperature parameter of each storage chamber meets the requirement, so the temperature in each storage chamber cannot be constant, and the air door floats within a certain range value.

In order to solve the above-mentioned drawbacks, in one embodiment, as shown in fig. 9 to 12, a solution for blowing air by using a dual blowing fan is provided. That is, the refrigerator includes the first fan 104 and the second fan 105, and the supply air duct 141 includes a first air duct 1411 supplying air to the variable temperature compartment and a second air duct 1412 supplying air to the freezing compartment 132. The first fan 104 and the second fan 105 are disposed in the cooling chamber, and the first fan 104 is configured to induce a cooling air flow to the variable temperature chamber through the first air duct 1411, and the second fan 105 is configured to induce a cooling air flow to the freezing chamber 132 through the second air duct 1412. And the refrigerating chamber has low temperature reduction requirement, so the refrigerating chamber can be cooled by utilizing the conventional mode of controlling the temperature by controlling the opening time of the air door.

The freezing chamber 132 and the refrigerating chamber of the refrigerator are respectively provided with a fan for supplying air so that the cooling air flows in the first air duct 1411 and the second air duct 1412 do not cross each other, thereby preventing the temperatures of the freezing chamber 132 and the temperature-changing chamber from interfering with each other. In particular, it is also possible to continuously control the temperatures in the variable temperature chamber and the freezing chamber 132 by controlling the air blowing amounts of the first fan 104 and the second fan 105, respectively, so that the temperatures in the freezing chamber 132 and the variable temperature chamber are made more constant.

In order to enable the first fan 104 and the second fan 105 to give enough driving force to the airflow in the corresponding air duct to prevent the airflow in the first air duct 1411 and the second air duct 1412 from flowing into each other, in one embodiment, the first fan 104 and the second fan 105 may be disposed downstream of the evaporator 101 (with the flow direction of the cooling air determining the upstream and the downstream). The first fan 104 is disposed downstream of the evaporator 101, so that the first fan is closer to an air inlet of the first air duct 1411, and the airflow generated by the first fan 104 is guided to the first air duct 1411 as much as possible, thereby improving the control accuracy of the temperature in the temperature changing chamber. Similarly, the second fan 105 disposed downstream of the evaporator 101 can also improve the control accuracy of the temperature in the freezing chamber 132.

When the evaporator 101 of the refrigerator is disposed below each storage compartment, the air supply duct 141 needs to supply cooling air from bottom to top. In order to enhance the air supply efficiency of the air supply fans, the air supply fans can convey cooling air flow in an upward oblique direction no matter how many air supply fans are. When the number of the fans is two, as shown in fig. 10 to 12, the first fan 104 and the second fan 105 may be axial fans, and the first fan 104 and the second fan 105 both deliver the cooling airflow in an upward direction along the flowing direction of the cooling airflow. Specifically, the included angle between the rotation axes of the first fan 104 and the second fan 105 and the horizontal plane (i.e., the angle a in fig. 10) may be 5 degrees to 60 degrees, such as 5 degrees, 10 degrees, 20 degrees, 40 degrees, or 60 degrees.

In one embodiment, as shown in fig. 10, the freezing inner container 130 of the refrigerator has a freezing chamber 132 disposed above the cooling chamber and a cooling chamber 133 disposed above the freezing chamber 132. The temperature-changing chamber is provided above the freezing inner container 130 (not shown in fig. 10). The freezing chamber 132 and the cooling chamber 133 may be defined by a drawer structure, that is, an upper drawer and a lower drawer may be disposed in the freezing liner 130, a space defined in the upper drawer is the cooling chamber 133, and a space defined in the lower drawer is the freezing chamber 132. The air supply duct 141 is disposed at the rear of the freezing inner container 130, and each air outlet of the air supply duct 141 is located at a position corresponding to the rear sidewall of each storage compartment.

The temperature-reducing chamber 133 is configured to reduce the temperature of the articles according to the requirement of the user, and the temperature range covers the temperature range of the freezing chamber 132 and the temperature range of the temperature-changing chamber, for example, the temperature range in the freezing chamber 132 is between-22 ℃ and-14 ℃, and when the temperature range of the temperature-changing chamber is between-18 ℃ and 8 ℃, the temperature range of the temperature-reducing chamber 133 is at least between-22 ℃ and 8 ℃. The temperature reduction chamber 133 is used as a temperature change chamber when the articles in the temperature change chamber of the refrigerator are full, and is used as a freezing chamber 132 when the articles in the freezing chamber 132 are full, so that the adaptability of the refrigerator is improved, and the use scenes of the refrigerator are richer.

When the cooling chamber 133 is provided, the air supply duct 141 of the refrigerator further includes a third duct 1413, and the first fan 104 supplies air into the cooling chamber 133 through the third duct 1413. A first damper 1416 is provided in the third air duct 1413, and a second damper 1415 is provided in the first air duct 1411. When the temperature reduction chamber 133 is used as a temperature change chamber, the first damper 1416 and the second damper 1415 may be periodically opened and closed at the same time, and the first fan 104 may supply air into the first duct 1411 and the third duct 1413 at the same time. When the temperature reduction chamber is used as the freezing chamber 132, the first damper 1416 may be opened, and the second damper 1415 may be periodically opened and closed, the first fan 104 may supply air into the first duct 1411 and the third duct 1413, and the second fan 105 may supply air into the second duct 1412, and at this time, the temperature in the temperature reduction chamber and the freezing chamber 132 may be approximately equal to the temperature of the evaporator 101 in the cooling chamber.

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

Claims

1. A refrigerator having dual blowing fans, comprising:

a first fan disposed within the cooling chamber configured to urge the cooling airflow toward the temperature changing chamber;

a second fan disposed in the cooling chamber and configured to urge the cooling airflow to flow toward the freezing chamber.

2. The refrigerator of claim 1, wherein

The refrigerator also comprises an air supply duct, wherein the air supply duct comprises a first air duct for supplying air to the temperature-changing chamber and a second air duct for supplying air to the freezing chamber;

3. The refrigerator of claim 2, wherein

The first fan is an axial flow fan, and the first fan conveys the cooling airflow to the obliquely upper part along the flowing direction of the cooling airflow;

the second fan is an axial flow fan, and the first fan conveys the cooling airflow obliquely upwards along the flowing direction of the cooling airflow.

4. The refrigerator of claim 3, wherein

The included angle between the rotation axis of the first fan and the horizontal plane is 5-60 degrees;

and the included angle between the rotation axis of the second fan and the horizontal plane is 5-60 degrees.

5. The refrigerator of claim 4, wherein

The box body also comprises a cooling chamber arranged above the cooling chamber, the temperature of the cooling chamber is configured to cover the temperature value range of the freezing chamber and the temperature value range of the temperature-variable chamber, and the air supply duct comprises a third air duct for supplying air to the cooling chamber;

6. The refrigerator of claim 5, wherein

The box body comprises a freezing inner container positioned at the lowest part, and the cooling chamber is limited in the freezing inner container;

7. The refrigerator of claim 6, wherein

At least one front return air inlet communicated with the freezing chamber is formed in the front side of the cooling chamber, so that return air flow of the freezing chamber enters the cooling chamber through the at least one front return air inlet to be cooled.

8. The refrigerator of claim 7, further comprising:

a top cover positioned above the evaporator;

at least one front cover group, wherein the front side of each front cover group is provided with at least one front return air inlet;

the top cover, the at least one front cover group and the rear wall, the bottom wall and the two transverse side walls of the freezing inner container jointly limit the cooling chamber.

9. The refrigerator of claim 8, wherein

The number of the front return air inlets is two, and the two front return air inlets are respectively marked as a first front return air inlet and a second front return air inlet;

the front cover group includes:

a front trim cover having a front end portion positioned in front of the front end of the evaporator and spaced apart from the front end of the evaporator, a front wall of the front end portion having a first opening formed therein, and a rear side of the front end portion being open;

and the front end part of the front air channel cover is positioned at the front end of the evaporator, and the front end part of the front air channel cover is inserted into the front decorative cover forwards from the rear open part of the front end part of the front decorative cover so as to divide the first opening into a first front return air inlet positioned below and a second front return air inlet positioned above.

10. The refrigerator of claim 9, wherein

A first return air channel communicated with the first front return air inlet is defined by the bottom wall of the front end part of the front air channel cover and the bottom wall of the front end part of the front decorative cover, and the first return air channel is positioned in front of the evaporator, so that at least part of return air flow entering the first return air channel through the first front return air inlet enters the evaporator from the front of the evaporator and is cooled by the evaporator.