CN108036570B

CN108036570B - Refrigerator refrigerating system and refrigerator

Info

Publication number: CN108036570B
Application number: CN201711279417.6A
Authority: CN
Inventors: 吴默; 史慧新; 张贤中; 龚勤勤
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2017-12-06
Filing date: 2017-12-06
Publication date: 2020-02-04
Anticipated expiration: 2037-12-06
Also published as: CN108036570A

Abstract

The invention relates to the technical field of refrigerators, and discloses a refrigerator refrigerating system and a refrigerator. This refrigerator refrigerating system is including setting up the wind channel in the box to and be used for the return air inlet and the air outlet with wind channel and refrigeration room intercommunication, be provided with centrifugal fan and evaporimeter in the wind channel, the evaporimeter is closed or not closed loop configuration, and centrifugal fan inhales the air current from the refrigeration room indoor through the return air inlet, and centrifugal fan's the direction of airing exhaust is corresponding with the evaporimeter, so that the centrifugal fan combustion air current can blow to the evaporimeter, and the refrigerated air current of evaporimeter gets into the refrigeration room through the air outlet. The refrigerator refrigerating system provided by the invention has the advantages that the centrifugal fan and the evaporator are arranged in the air duct, so that the space utilization rate of the refrigerator compartment can be improved. Moreover, the centrifugal fan exhausts air towards the inner ring surface of the evaporator, and the centrifugal fan sucks air flow from the refrigerating chamber through the air return opening, so that the air speed is high when the air passes through the evaporator, and the heat exchange efficiency of the evaporator is high compared with that of the evaporator in the prior art.

Description

Refrigerator refrigerating system and refrigerator

Technical Field

The invention relates to the technical field of refrigerator refrigeration, in particular to a refrigerator refrigeration system and a refrigerator.

Background

Referring to fig. 1, the air cooling system of the prior art includes an air duct 2 disposed at the rear portion of an inner container of a refrigerator and a fin evaporator 1 abutting against the rear portion of the air duct 2 or the rear portion of a cabinet of the refrigerator, the air duct 2 has an air return opening and an air outlet opening communicating with a refrigerating compartment, and the evaporator 1 cools an air flow in the air duct 2 by using fins. The air duct 2 is also provided with a fan 3 ', when the fan 3' rotates, air pressure is provided, the air exchanges heat with the evaporator 1 through the pipeline and the fins of the fin evaporator 1 from the air return port, and finally the air is supplied to the compartment through the air outlet of the air duct 2. The problems in the prior art are that the evaporator 1, the air channel 2 and the fan 3' are separately arranged, and the volume is large; in addition, the air speed is slow when the return air passes through the evaporator 1, so that the heat exchange efficiency is low; moreover, the air duct 2 generally needs to be provided with the air duct back plate 4, so that the manufacturing cost is high.

Disclosure of Invention

Technical problem to be solved

An object of the present invention is to provide a refrigeration system for a refrigerator, which is intended to solve at least one of the technical problems of the prior art or the related art.

Another object of the present invention is to provide a refrigerator including the above-mentioned refrigeration system of the refrigerator, which is intended to solve at least one of the technical problems in the prior art or the related art.

(II) technical scheme

In order to solve the technical problem, the invention provides a refrigerator refrigerating system which comprises an air duct arranged in a box body, and an air return opening and an air outlet used for communicating the air duct with a refrigerating chamber, wherein a centrifugal fan and an evaporator are arranged in the air duct, the evaporator is in a closed or non-closed annular structure, the centrifugal fan sucks air flow from the refrigerating chamber through the air return opening, the air exhaust direction of the centrifugal fan corresponds to that of the evaporator, so that the air flow exhausted by the centrifugal fan can be blown to the evaporator, and the air flow cooled by the evaporator enters the refrigerating chamber through the air outlet.

Wherein, the inner ring surface of the evaporator facing the centrifugal fan is an inward concave surface.

Wherein, the inner ring surface is an inwards concave arc or polygon.

Wherein the annular structure comprises a circular ring, an oval ring and a polygonal ring.

When the evaporator is in a non-closed annular structure, a wind shield is arranged at the notch of the annular structure.

Wherein, the evaporator is a fin evaporator or a rotary fin evaporator or a micro-channel evaporator.

The air duct is provided with an air duct panel and an air duct back plate which are detachably connected, an air duct inner cavity is formed between the air duct panel and the air duct back plate, and the air return inlet and the air outlet are both arranged on the air duct panel.

The air duct back plate is formed by a rear wall and a side wall of the refrigerator liner, steps are arranged on the side wall, and the air duct panel is detachably connected with the steps.

The air return inlet is positioned in the middle of the air duct panel, and the center of the air return inlet corresponds to the center of the centrifugal fan.

The air outlet is distributed around the air return opening.

Wherein, the return air inlet adopts a hollow structure.

Wherein, an air guide pipe is arranged at the air outlet.

The evaporator and the centrifugal fan are detachably connected with the air duct back plate.

The invention also discloses a refrigerator which comprises the refrigerator refrigerating system.

(III) advantageous effects

The invention provides a refrigerator refrigerating system, which comprises an air duct arranged in a box body, and an air return opening and an air outlet used for communicating the air duct with a refrigerating chamber, wherein a centrifugal fan and an evaporator are arranged in the air duct, the evaporator is in a closed or non-closed annular structure, the centrifugal fan sucks air flow from the refrigerating chamber through the air return opening, the air exhaust direction of the centrifugal fan corresponds to that of the evaporator, so that the air flow exhausted by the centrifugal fan can be blown to the inner annular surface of the evaporator, and the air flow cooled by the evaporator enters the refrigerating chamber through the air outlet. In the scheme, the centrifugal fan and the evaporator are both arranged in the air duct, so that the space utilization rate of the refrigerator compartment can be improved. Moreover, the centrifugal fan exhausts air towards the inner ring surface of the evaporator, and the centrifugal fan sucks air flow from the refrigerating chamber through the air return opening, so that the air speed is high when the air passes through the evaporator, and the heat exchange efficiency of the evaporator is high compared with that of the evaporator in the prior art.

Drawings

Fig. 1 is a schematic structural view of an air cooling system in a refrigerator in the related art;

FIG. 2 is an exploded schematic view of a preferred embodiment of a refrigeration system for a refrigerator in accordance with the present invention;

FIG. 3 is a schematic front view of an assembled refrigeration system for a refrigerator in an embodiment;

FIG. 4 is a schematic cross-sectional view taken at A-A in FIG. 3;

FIG. 5 is a schematic top view of an assembled refrigerator refrigeration system of an embodiment;

FIG. 6 is a schematic structural view of an evaporator and a centrifugal fan in the embodiment;

FIG. 7 is a schematic cross-sectional view taken at B-B of FIG. 6;

FIG. 8 is a schematic structural view of a duct panel in an embodiment;

FIG. 9 is a left side view of the duct panel of FIG. 8;

FIG. 10 is a schematic view of an embodiment of a refrigerator refrigeration system installed in a refrigerator compartment;

fig. 11 is a schematic configuration diagram of another preferred embodiment of an evaporator of a refrigeration system for a refrigerator according to the present invention.

In the figure, 1: an evaporator; 101: a radiating pipe; 102: a heat dissipating fin; 103: an inner ring surface; 104: a wind deflector; 2: an air duct; 201: an air duct panel; 202: an air duct back plate; 3: a centrifugal fan; 3': a fan; 4: an air return opening; 5: an air outlet; 6: and (5) buckling.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 to 10 show a preferred embodiment of a refrigeration system for a refrigerator according to the present invention. As shown in the figure, this refrigerator refrigerating system is including setting up wind channel 2 in the box to and be used for wind channel 2 and the return air inlet 4 and the air outlet 5 of refrigeration room intercommunication, be provided with centrifugal fan 3 and evaporimeter 1 in the wind channel 2, evaporimeter 1 is non-closed loop configuration, centrifugal fan 3 inhales the air current from the refrigeration room through return air inlet 4, centrifugal fan 3's the direction of airing exhaust and evaporimeter 3 are corresponding, so that centrifugal fan 3 exhaust air current can blow to evaporimeter 1, the air current through evaporimeter 1 refrigerated air current gets into the refrigeration room through air outlet 5 and refrigerates.

The centrifugal fan 3 and the evaporator 1 are both arranged in the air duct 2, so that the space utilization rate of the refrigerator compartment can be improved. Moreover, because the centrifugal fan 3 exhausts air towards the inner ring surface 103 of the evaporator 1, and the centrifugal fan 3 sucks air flow from the refrigerating chamber through the air return opening 4, the air speed is high when the air passes through the evaporator 1, and the heat exchange efficiency of the evaporator is high compared with that of the evaporator in the prior art.

Preferably, the inner annular surface 103 of the evaporator 1 facing the centrifugal fan 3 is an inner concave surface, and the refrigerator refrigerating system improves the heat exchange efficiency by arranging the inner annular surface 103 of the evaporator 1 facing the centrifugal fan 3 to be an inner concave surface, so that the airflow discharged by the centrifugal fan 3 can smoothly flow to the evaporator 1, and the front collision between the airflow discharged by the centrifugal fan 3 and the airflow discharged by the centrifugal fan 3 when part of the airflow returns after touching the evaporator 1 (i.e. meets resistance) is avoided, so that the airflow discharged by the centrifugal fan 3 is prevented from rapidly reaching the evaporator 1.

Specifically, in this embodiment, the air intake direction of the centrifugal fan 3 corresponds to the air return opening 4, so as to ensure that the air flow in the refrigerating compartment can quickly enter the centrifugal fan 3. Here, "the air intake direction of the centrifugal fan 3 corresponds to the air return opening 4" indicates that: the return air opening 4 is provided on or in the vicinity of the impeller shaft of the centrifugal fan 3, as standard, to enable the return air to enter the impeller of the centrifugal fan 3.

Furthermore, as shown in fig. 7, it is preferable that the centrifugal fan 3 corresponds to the concave surface 103 of the evaporator 1, so that the whole air flow flowing out from the centrifugal fan 3 can rapidly enter the concave surface of the evaporator 1, and it is avoided that a part of the air flow flowing out from the centrifugal fan 3 cannot enter the evaporator 1, thereby improving the heat exchange efficiency.

Specifically, the centrifugal fan 3 generates a negative pressure in its own air intake direction when turned on. Because the air inlet direction of the centrifugal fan 3 corresponds to the air return opening 4, negative pressure is generated at the air return opening 4, so that the return air enters the centrifugal fan 3 through the air return opening 4. In which the return air passes through the impeller of the centrifugal fan 3, undergoes phase change (reversal) and flows in the radial direction of the impeller. Because the evaporator 1 is annular and surrounds the centrifugal fan 3, the centrifugal fan 3 can exhaust air towards the inner annular surface of the evaporator 1. The air forms cold air and is full of the wind channel cavity after the evaporator 1 surrounding the outer side of the centrifugal fan 3 is cooled, along with the increasing of air in the wind channel cavity, the wind pressure is increased, and the cold air can be blown into the refrigerating chamber of the refrigerator through the air outlet 5 to cool the refrigerating chamber. After the cold air fully exchanges heat in the refrigerating chamber, the cold air enters the air duct 2 through the air return opening 4, and the circulation is carried out.

It should be noted that in other embodiments of the present invention, the evaporator 1 may also be in a closed loop configuration. In the present invention, the annular structure includes not only a circular ring, but also an elliptical ring, a polygonal ring (for example, a rectangular ring, a hexagonal ring, etc., as shown in fig. 11), as long as the evaporator 1 of such a shape can at least partially surround the centrifugal fan 3 and allow the centrifugal fan 3 to discharge air toward the inner annular surface 103 of the evaporator 1. When the evaporator 1 adopts a non-closed annular structure, because the evaporator 3 has a circumferential notch, the wind shield 104 can be arranged at the position of the centrifugal fan 3 corresponding to the notch, or the wind shield 104 is arranged at the notch position of the evaporator 1, so that the air flow can not flow out from the notch position, and the evaporator 1 is ensured to fully cool the air flow.

It should be noted that in the embodiment, the inner annular surface 103 of the evaporator 1 is concave arc, however, it should be understood by those skilled in the art that in other embodiments of the present invention, the inner annular surface 103 of the evaporator 1 may also be concave polygon, for example, the angle between two adjacent sides of the polygon is 142 °.

The evaporator 1 may be a fin evaporator, and the evaporator 1 includes a heat radiating pipe 101 and a heat radiating fin 102 fixed to the heat radiating pipe 101. The heat dissipation pipe 101 is a hollow pipe for passing the refrigerant liquid and absorbing heat by evaporation. In addition, the heat dissipation fins 102 serve to enhance heat exchange, and therefore, the heat dissipation fins 102 are generally made of metal or a material having high thermal conductivity. Of course, in addition to the fin-type evaporator 1, any other type of evaporator 1 may be used in the present embodiment as long as it can meet the heat exchange requirement in the present embodiment.

On the basis, in order to further enhance the heat dissipation, the S-shaped heat dissipation pipe 101 is adopted in the present embodiment. For example, when the evaporator 1 has a circular ring shape, the heat pipe 101 is distributed in an S-shape along the radial direction of the evaporator 1, and the return air entering the inner ring surface 103 and leaving the outer ring surface is sufficiently heat-exchanged. Also, it is preferable that the heat radiating fins 102 each extend in a radial direction of the evaporator 1 to ensure uniform heat exchange and facilitate distribution of the heat radiating fins 102.

It should be noted that in other embodiments of the present invention, the evaporator 1 may be a rotary fin evaporator or a microchannel evaporator to further enhance heat exchange.

Referring further to fig. 2, the duct 2 has a duct panel 201 and a duct back panel 202, and a duct cavity is formed between the duct panel 201 and the duct back panel 202. The air duct panel 201 and the air duct back panel 202 can be connected by clamping, and the connection mode between the air duct panel 201 and the air duct back panel 202 is not limited by the clamping mode. Moreover, the refrigerator liner is preferably adopted as the air duct back plate 202, so that the air duct back plate 202 does not need to be additionally arranged, and the effects of simplifying the structure and reducing the cost are achieved. When the rear wall, the two side walls and the air duct panel 201 of the refrigerator liner enclose an air duct inner cavity. For the convenience of connection, preferably all be provided with the step on both sides wall, be provided with the buckle on wind channel panel 201, be provided with on the step with buckle complex draw-in groove.

On the basis, the air return opening 4 and the air outlet 5 are both arranged on the air duct panel 201. Preferably, the air return opening 4 is in a hollow structure. Referring to fig. 2, preferably, the air return opening 4 is located in the middle of the air duct panel 201, the number of the air outlet openings 5 is plural, and the air outlet openings 5 are distributed around the air return opening 4. Under this kind of condition, because return air inlet 4 is located the middle part of wind channel panel 201, can let sunken cold air up flow, the temperature homogeneity in the very big improvement room. And because the quantity of air outlets 5 is a plurality of and distributes around return air inlet 4 to can further improve temperature homogeneity.

It should be noted that the air return opening 4 is not necessarily disposed in the middle of the air duct panel 201, as long as it can be ensured that the air return opening corresponds to the air inlet direction of the centrifugal fan 3. In addition, the number and distribution of the air outlets 5 are not limited by the drawings, and may be any number, or may be randomly distributed on the air duct panel 201.

Further, the centrifugal fan 3 and the evaporator 1 are preferably fixed to the duct back plate 202. For example, the evaporator 1 may have a fixing structure such as a screw hole or a plastic clip, so that the evaporator 1 is assembled to the air duct back plate 202 through the screw hole or the plastic clip, although the fixing manner between the evaporator 1 and the air duct back plate 202 is not limited by the embodiment. In addition, a fixing structure such as a screw hole or a plastic buckle is generally arranged on the base of the centrifugal fan 3, so that the centrifugal fan 3 is assembled on the air duct back plate 202 through the screw hole or the plastic buckle, and the fixing mode between the centrifugal fan 3 and the air duct back plate 202 is not limited by the embodiment.

And, when the air duct back plate 202 is a refrigerator liner, the evaporator 1 and the centrifugal fan 3 are directly fixed on the refrigerator liner. Under the condition, the air duct back plate in the traditional technology is equivalently cancelled, so that the manufacturing cost is saved. Preferably, the air duct back plate 202 is formed by a rear wall and a side wall of the refrigerator inner container, a step is arranged on the side wall, and the air duct panel 201 is detachably connected with the step.

In this embodiment, please refer to fig. 3 to 5 for the assembled refrigeration system of the refrigerator. As can be seen from the figure, the air return opening 4 of the air duct panel 201 is disposed opposite to the central axis of the centrifugal fan 3, and the air outlet 5 is disposed around the air return opening 4. The centrifugal fan 3 and the evaporator 1 are coaxially disposed in the drawing.

In fig. 3, an air duct is disposed at the air outlet 5, and the air duct can guide the wind direction, so that the temperature in the refrigerator compartment is more uniform. The air duct may be perpendicular to the air duct panel 201 or may form a certain angle with the air duct panel 201.

On the basis, the embodiment also provides a refrigerator which comprises the refrigerator refrigerating system. Referring to fig. 8, preferably, the air duct 2 is located at a position close to a rear wall of the inner container of the refrigerator. Other technical effects of the refrigerator according to the embodiment of the present invention correspond to those of the refrigeration system of the refrigerator, and are not described herein again to avoid unnecessary repetition.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A refrigerator refrigerating system is characterized by comprising an air duct arranged in a box body, and an air return opening and an air outlet used for communicating the air duct with a refrigerating chamber, wherein a centrifugal fan and an evaporator are arranged in the air duct, the evaporator is of a closed or non-closed annular structure, the centrifugal fan sucks air flow from the refrigerating chamber through the air return opening, the air exhaust direction of the centrifugal fan corresponds to that of the evaporator, so that the air flow exhausted by the centrifugal fan can be blown to the evaporator, and the air flow cooled by the evaporator enters the refrigerating chamber through the air outlet; the inner ring surface of the evaporator facing the centrifugal fan is an inward concave surface.

2. The refrigerator cooling system of claim 1 wherein the inner annular surface is concave arcuate or polygonal.

3. The refrigerator cooling system of claim 1 wherein the ring structure comprises a circular ring, an elliptical ring, or a polygonal ring.

4. The refrigeration system as recited in claim 1 wherein the evaporator is in a non-closed loop configuration with a wind deflector disposed at a gap of the loop configuration.

5. The refrigerator cooling system of claim 1, wherein the evaporator is a fin evaporator or a rotary fin evaporator or a microchannel evaporator.

6. The refrigerator refrigerating system of claim 1 wherein the air duct has a duct panel and a duct back panel that are detachably connected, an air duct cavity is formed between the duct panel and the duct back panel, and the air return opening and the air outlet are both disposed on the duct panel.

7. The refrigerator refrigerating system of claim 6 wherein the air duct back plate is formed by a rear wall and a side wall of the refrigerator liner, the side wall is provided with a step, and the air duct panel is detachably connected with the step.

8. The refrigeration system as recited in claim 6 wherein said air return opening is located in the middle of said air duct panel, the center of said air return opening corresponding to the center of said centrifugal fan.

9. The refrigerator cooling system of claim 8, wherein the air outlet is plural in number, and the air outlet is distributed around the air return opening.

10. The refrigeration system as recited in claim 6 wherein said air return opening is hollow.

11. The refrigerator cooling system of claim 6, wherein an air duct is disposed at the air outlet.

12. The refrigerator cooling system of any one of claims 1-11 wherein the evaporator and the centrifugal fan are both removably connected to the duct back.

13. A refrigerator characterized by comprising the refrigerator refrigeration system of any one of claims 1 to 12.