CN112254405A

CN112254405A - Refrigerator with a door

Info

Publication number: CN112254405A
Application number: CN201910661786.4A
Authority: CN
Inventors: 张海鹏; 杨大海; 潘毅广; 孙敬龙; 丁龙辉
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2021-01-22

Abstract

The invention discloses a refrigerator, which comprises a storage chamber and an evaporator chamber positioned on the lower side in the storage chamber, wherein the evaporator chamber comprises an evaporator and a heater positioned on the lower side of the evaporator, a water receiving tank is arranged at the bottom of the evaporator chamber, the evaporator comprises a coil pipe and a plurality of rows of fins sleeved on the coil pipe, the plurality of rows of fins are arranged into a plurality of rows of fins along the vertical direction, an inclined water guide part is arranged at the bottommost row of fins of each row of fins, the heater is arranged below the water guide part, and defrosting water generated on the fins of the evaporator directly flows down into the water receiving tank along the lower end of the water guide part without passing through the heater. According to the refrigerator, the water guide part which is inclined downwards is arranged at the bottom of the evaporator fin, defrosting water is guided to one side from the water guide part and drops into the water receiving tank, and the defrosting water is prevented from dropping onto the heating wire of the heater to generate abnormal sound; the evaporator has a simple integral structure, other shielding parts do not need to be added between the evaporator and the heater, and the heat exchange efficiency and the defrosting efficiency of the evaporator cannot be influenced.

Description

Refrigerator with a door

Technical Field

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

Background

Defrosting principle of the refrigerator: the fin evaporator is fixed on the freezing inner container, the refrigerator refrigeration makes the fin evaporator go up frosting, makes the frost on the fin evaporator melt for defrosting water through the heater strip heating during defrosting, and defrosting water drips to the defrosting water receiving tank of lower part in, flows into the outside evaporating dish of box through the drain pipe, through the hot pipeline of evaporating dish in accelerating the evaporation of defrosting water again. In the defrosting process, the temperature of the heating wire can reach more than 300 ℃, and defrosting water or ice blocks drop on the heating wire and are quickly vaporized to generate the noise of 'split type'.

Two methods for eliminating abnormal sound in the defrosting period are currently used, one is to shield the heating wire, and the other is to adopt a low-temperature (not more than 90 ℃) defrosting method. The first method comprises the following steps: the heating wire is provided with the shielding plate, and in order to ensure defrosting efficiency, the shielding plate is provided with the strip-shaped hole, so that heat can be conveniently circulated, and the probability that defrosting water drops on the heating wire is reduced; and the second method comprises the following steps: the heating wires are aluminum tube heating wires which are evenly distributed between the evaporation tubes and the fins, and the temperature of the heating wires does not exceed 90 ℃ in the defrosting period; the two methods can reduce or avoid abnormal noise in the defrosting period, but the first method has difficult installation and higher requirements on the position and the installation angle of the shielding plate, thereby influencing the heat exchange efficiency of the evaporator; in the second method, because the heating wire is far away from the defrosting water receiving tank, in order to ensure that defrosting water is smoothly discharged, the heating wire needs to be added on the defrosting water receiving tank, and defrosting needs to be carried out for a long time, so that the defrosting efficiency of the whole machine is very low, and the freezing and fresh-keeping performance of the refrigerator is not facilitated.

Disclosure of Invention

Based on the technical problem, the invention aims to provide the refrigerator which can avoid the noise generated by the rapid vaporization of the defrosting water, has high defrosting efficiency, does not influence the heat exchange of an evaporator and has a simple structure.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

the utility model provides a refrigerator, includes the storeroom and is located the inside evaporator room of downside of storeroom, the evaporator room includes the evaporimeter and is located the heater of evaporimeter downside, the bottom of evaporator room is equipped with the water receiving tank, and the bottom of water receiving tank is equipped with the wash port, the evaporimeter includes the coil and the cover is located multirow fin on the coil, multirow fin is arranged into multiseriate fin along vertical direction, and one row of fin in the bottommost of every row of fin, its lower part are provided with the water guide of slope, the heater sets up the below of water guide, the defrosting water that produces on the fin of evaporimeter is followed the lower extreme of water guide does not pass through the heater direct flow down to in the water receiving tank.

In one embodiment, the bottom edges of the fins are obliquely arranged along the direction perpendicular to the axis of the coil pipe and are provided with bent parts, and the bent parts form the water guide parts.

In one embodiment, the lower portion of the fin is provided with an inclined groove recessed along the surface of the fin, the groove forming the water guide portion.

In one embodiment, the lower part of the fin is punched to form the groove, and the inner concave surface and the outer convex surface of the groove form the water guide part.

In one embodiment, a surface of the water guide is provided with a hydrophobic layer.

In one embodiment, the plurality of rows of fins are divided into a plurality of layers from top to bottom, and the density of the fins in each layer decreases from top to bottom.

In one embodiment, each row of fins on the lower layer can be aligned in a row with the fins on the upper layer.

In one embodiment, the fins of each layer are uniformly arranged, and the fin density of each layer is reduced by half in turn.

In one embodiment, the water guide part has an inclination angle ranging from 10 to 45 °.

In one embodiment, the width of the water guide part ranges from 1 mm to 5 mm.

Compared with the prior art, the invention has the advantages and positive effects that:

in the refrigerator, the water guide part which is inclined downwards is arranged at the bottom of the evaporator fin, defrosting water is guided from the water guide part to one side to drip and is guided into the water receiving tank, and the phenomenon that the defrosting water drips on a heating wire of the heater to generate split noise is avoided; the integral structure is simple, other shielding parts do not need to be added between the evaporator and the heater, the evaporator is not limited by the installation space of the evaporator, and the heat exchange efficiency of the evaporator is not influenced; the heater is located the evaporimeter bottom, does not have other shielding parts, and it is efficient to change the frost.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a refrigerator according to the present invention;

FIG. 2 is a schematic view of a refrigeration system of the refrigerator of the present invention;

FIG. 3 is a first schematic perspective view of an evaporator and a heater according to a first embodiment of the refrigerator of the present invention;

FIG. 4 is an enlarged view taken at I in FIG. 3;

FIG. 5 is a front view of an evaporator in a first embodiment of a refrigerator according to the present invention, illustrating a multi-layered fin structure;

FIG. 6 is a schematic perspective view of an evaporator and a heater in a first embodiment of a refrigerator according to the present invention;

FIG. 7 is an enlarged view taken at II in FIG. 6;

fig. 8 is a schematic structural view of a fin having a water guide portion in a second embodiment of the refrigerator according to the present invention;

description of reference numerals:

a refrigerator 1;

a storage chamber 100; a freezing chamber 100A; a refrigerating compartment 100B;

a door body 200; a freezing chamber door 200A; a refrigerating chamber door body 200B;

a refrigeration system 300; a compressor 310; a condenser 320; a solenoid valve 330; a throttle device 340; a first throttling device 341; a second throttling device 342; an evaporator 350; a refrigerating compartment evaporator 351; a freezing chamber evaporator 352; a reservoir 360;

a heater 400;

a coil 353; the fins 354; a bending portion 3541; groove 3542.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

FIG. 1 is a perspective view of one embodiment of a refrigerator according to the present invention; referring to fig. 1, the refrigerator 1 of the present embodiment has an approximately rectangular parallelepiped shape. The external appearance of the refrigerator 1 is defined by a storage chamber 100 defining a storage space and a plurality of door bodies 200 provided in the storage chamber 100. Referring to fig. 1, the door 200 includes a door outer shell located outside the storage chamber 100, a door inner located inside the storage chamber 100, an upper end cover, a lower end cover, and a heat insulating layer located between the door outer shell, the door inner, the upper end cover, and the lower end cover; typically, the thermal insulation layer is filled with a foam material.

The storage chamber 100 has an open cabinet, and the storage chamber 100 is vertically partitioned into a lower freezer compartment 100A and an upper refrigerator compartment 100B. Each of the partitioned spaces may have an independent storage space.

In detail, the freezing compartment 100A is defined at a lower side of the storage compartment 100 and may be selectively covered by a drawer type freezing compartment door 200A. The space defined above the freezing compartment 100A is partitioned into left and right sides to define the refrigerating compartment 100B, respectively.

The refrigerating compartment 100B may be selectively opened or closed by a refrigerating compartment door body 200B pivotably mounted on the refrigerating compartment 100B.

Fig. 2 shows a refrigeration system 300 of the refrigerator according to the present invention, the refrigeration system 300 includes a compressor 310, a condenser 320, a throttling device 340, and an evaporator 350, and an accumulator 360 is disposed between an outlet of a freezing chamber evaporator 352 and a suction port of the compressor 310. In this embodiment, the evaporator 350 includes a refrigerating chamber evaporator 351 and a freezing chamber evaporator 352, a high-temperature and high-pressure gaseous refrigerant discharged from the compressor 310 is cooled by the condenser 320 and then becomes a normal-temperature liquid refrigerant, and is divided into two paths by the electromagnetic valve 330, wherein one path of the refrigerant enters the refrigerating chamber evaporator 351 after being throttled and depressurized by the first throttling device 341 (first capillary tube), the other path of the refrigerant enters the freezing chamber evaporator 352 after being throttled by the second throttling device 342 (second capillary tube), a refrigerant pipeline flowing out of the refrigerating chamber evaporator 351 is connected to a pipeline between the second throttling device 342 and the freezing chamber evaporator 352, the liquid refrigerant flowing out of the freezing chamber evaporator 352 returns to the reservoir 360, and the gaseous refrigerant returns to the return port of the compressor 310. When the freezing chamber 100B requires refrigeration, the compressor 310 is started, the electromagnetic valve 330 is controlled to introduce the refrigerant into the pipeline where the second throttling device 304 is located, the refrigerant passes through the freezing chamber evaporator 3052 and then flows into the air return port of the compressor 310 through the liquid storage device 360, and the refrigeration of the freezing chamber 100B is realized through the above cycle process. When the refrigerating chamber 100A requires refrigeration, the electromagnetic valve 330 is controlled to introduce the refrigerant into the pipeline where the first throttling device 3041 is located, and the refrigerant passes through the refrigerating chamber evaporator 351 and the freezing chamber evaporator 352 in sequence and then flows into the air return port of the compressor 310 through the liquid storage device 360, so that refrigeration of the refrigerating chamber is realized through the above cycle process.

An evaporator chamber is provided at the lower side of the interior of the storage chamber 100, the evaporator chamber includes an evaporator 350 and a heater 400 at the lower side of the evaporator, as shown in fig. 3 and 4, the heater 400 is provided below the evaporator 350, a water receiving tank (not shown) for collecting defrosting water is provided below the heater 400, and a drain hole is provided at the bottom of the water receiving tank. The evaporator 350 is a finned evaporator 350, and includes a coil 353 and a plurality of rows of fins 354 sleeved on the coil 353, wherein the plurality of rows of fins are arranged in a plurality of rows of fins along a vertical direction. The bottom of each row of fins is provided with an inclined water guide part, namely, one end of the water guide part is higher and the other end is lower in the front-back direction. The heater 400 is disposed below the evaporator 350 and below the water guide. The hot air heated by the heater 400 enters the evaporator 350 to defrost the upper evaporator 350. Because most of the frost is condensed on the fins 354, after defrosting, most of the defrosting water generated by the evaporator 350 flows down along the fins 354 of the evaporator 350 and finally flows down along the lower end of the water guide part at the lower part of the fins 354, so that the defrosting water does not directly flow down to the water receiving tank through the heater 400, the defrosting water is prevented from directly dropping on the heater 400, and meanwhile, the flowing of air is not or rarely influenced, and the heat exchange and defrosting efficiency of the evaporator are not influenced.

In the refrigerator, the water guide part which inclines downwards is arranged at the bottom of the fin 354 of the evaporator 350, the defrosting water is guided from the water guide part to one side to drip and is guided into the water receiving groove, and the phenomenon that the defrosting water drips on the heating wire of the heater 400 to generate split noise is avoided; the whole structure is simple, other shielding parts do not need to be added between the evaporator 350 and the heater 400, and the installation space of the evaporator 350 is not limited; the heater 400 is positioned at the bottom of the evaporator 350 without other shielding parts, and does not affect the heat exchange and defrosting efficiency of the evaporator.

Example one

In this embodiment, referring to fig. 1-7, the bottom side of the fins 354 is inclined in a direction perpendicular to the axis of the coil, i.e., the bottom side of the fins 354 is inclined forward and backward, and is higher at one end and lower at the other end. The bottom edge of the fin 354 is provided with a bent portion 3541, and the bent portion 3541 forms the water guide portion. The defrosted water flows down vertically along the fins 354, then flows down along the bottom ends of the bent portions 3541 under the guidance of the bent portions 3541, and then drops into the water receiving tank from one side of the fins 354.

Further, in order to enable the defrosting water to flow down smoothly and rapidly and increase the water guiding effect of the bent portion 3541, a hydrophobic layer (not shown) is further provided on the upper surface of the bent portion 3541. Specifically, a hydrophobic material, preferably a superhydrophobic material, is coated on the surface of the bending portion 3541, so that water can flow down rapidly. In this embodiment, the bending portion 3541 is a plane, and the bottom edge L-shaped bending of the fin 354 forms the bending portion 3541, that is, the bending portion 3541 and the vertical fin 354 form a right angle therebetween, so that defrosting water can flow down uniformly along the plane of the bending portion 3541, and the defrosting water heater is simple in structure and convenient to process and manufacture. In other embodiments, the bending portion 3541 and the vertical fin 354 may also be bent at an acute angle or in a groove shape.

In the present embodiment, as shown in fig. 5, the fins 354 in the plurality of rows are divided into a plurality of layers from top to bottom, and the density of the fins 354 in each layer decreases from top to bottom. Preferably, the rows of fins 354 are divided into three layers, an upper layer A, a middle layer B and a lower layer C from top to bottom. The fins 354 of each layer are uniformly arranged and the density of the fins 354 of each layer is in turn reduced by half. Each row of fins on the lower layer can be arranged in a row in alignment with the fins on the upper layer. When the refrigerant enters the coil 353 from the upper side of the evaporator 350, the temperature difference between the refrigerant and the environment is large, the density of the upper-layer fins 354 is the maximum, and the refrigerant can be effectively utilized for heat exchange; the temperature of the refrigerant rises after heat exchange through the upper-layer fins 354, the temperature difference with the environment is relatively small, and the refrigerant exchanges heat with the environment through the middle-layer fins 354 with relatively small density; after heat exchange is performed by the middle-layer fins 354, the temperature of the refrigerant is further increased, the refrigerant is further subjected to heat exchange with the environment through the lower-layer fins 354 with the minimum density, and the refrigerant can be further effectively utilized. The design can reduce the consumption of the fins 354, reduce the cost, realize the high-efficiency utilization rate of the refrigerant according to the temperature difference between the refrigerant and the environment, improve the performance of the evaporator 350, and save more energy and protect environment.

As shown in fig. 6 and 7, each row of fins on the lower layer can be aligned in a row with the fins on the upper layer in spaced alignment. Of the bottommost fins 354 of each layer, the fins 354 aligned with the fins 354 are not located right below the bottommost fins 354, and the bent portions 3541 are provided below the bottommost fins 354. With the aligned fins 354 directly below, the fluid can flow down the lower fins 354 until it falls onto the folds 3541 on the bottom most fins 354 in the row. The fins 354 without the alignment fins 354 right below are provided with the bent parts 3541, so that the defrosting water on the fins of the layer can be guided through the bent parts 3541 at the bottom of the layer. In this embodiment, the fins 354 at the lower layer can be aligned with the partial fins 354 at the upper layer in the vertical direction, so that the fins with water guiding parts can be arranged at intervals at the bottoms of the upper layer and the middle layer, and the bottommost fins 354 at the lower layer are all provided with water guiding parts to guide the defrosting water generated by each layer of fins in a layered manner. In other embodiments, if the fins in each layer are not aligned with each other, the bending portion 3541 may be provided in the bottommost fin 354 in each layer.

Preferably, the inclination angle range of the bending portion 3541 is preferably 10-45 degrees, which not only can ensure that the defrosting water flows down smoothly, but also can ensure that the volume of the evaporator 350 is not too large and occupies a large space. One end of the rear side of the bending portion 3541 is low, one end of the front side is high, and the water receiving groove is arranged below the evaporator 350 and at a position which is inclined to the rear side, and is used for receiving the defrosting water and the ice blocks which flow down from the evaporator 350.

The preferred 1~5mm of width scope of portion 3541 of bending is less than the distance between the two adjacent fins 354 on the horizontal direction, can guarantee that the hot-air of below heater 400 heating smoothly gets into in evaporimeter 350, improves heating efficiency. The width of the bent portion 3541 of the bottom fin 354 of each layer can be kept consistent, and the width of the bent portion 3541 of each layer can be reasonably set according to the horizontal gap between the fins 354 of each layer and can be gradually reduced from bottom to top.

In this embodiment, the heater 400 includes a steel tube type heating wire, the lower portion of which is bent along the vertical plane S-shape, and the lower portion of which is perpendicular to the fins 354 and is disposed below the middle position of each of the bottommost fins 354, so as to ensure that the evaporator 350 is heated uniformly and improve the heating efficiency. The heating wire is fixed to a side plate of the evaporator 350 by a fixing bracket. In the present embodiment, the heating wire has a single-row structure, and in other embodiments, the evaporator 350 of the present invention is also applicable to a heating wire having a double-row structure.

Example two

The second embodiment is different from the first embodiment in the structure of the water guide part. As shown in fig. 8, in the present embodiment, the lower portion of the fin 354 is provided with an inclined groove 3542 recessed along the surface of the fin 354, the groove 3542 forming a water guide portion. The fins 354 are rectangular, the lower parts of the fins 354 are punched with inclined grooves 3542 by a punching process, and the inner concave surfaces and the outer convex surfaces of the grooves 3542 form the water guide parts and have a flow guide effect. Hydrophobic layers are arranged on the inner concave surface and the outer convex surface of the groove 3542. The fins 354 are rectangular, so that the fins can be conveniently arranged during processing, and the grooves 3542 are punched by a punching process, so that the operation is simple and convenient. It should be noted that the structural form of the water guide portion is not limited to the structure described in the present invention, and any water guide structure capable of guiding the water flow to flow down along one side of the fin 354 is within the scope of the present application.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. The refrigerator comprises a storage chamber and an evaporator chamber located on the lower side of the interior of the storage chamber, wherein the evaporator chamber comprises an evaporator and a heater located on the lower side of the evaporator, a water receiving groove is formed in the bottom of the evaporator chamber, a drain hole is formed in the bottom of the water receiving groove, the evaporator comprises a coil and a plurality of rows of fins sleeved on the coil, and the fins are arranged into a plurality of rows of fins in the vertical direction.

2. The refrigerator according to claim 1, wherein the fins are provided with bent portions at bottom edges thereof which are inclined in a direction perpendicular to the axis of the coil pipe, and the bent portions form the water guide portion.

3. The refrigerator of claim 1, wherein a lower portion of the fin is provided with an inclined groove recessed along a surface of the fin, the groove forming the water guide.

4. The refrigerator according to claim 3, wherein the lower portion of the fin is punched to form the groove, and both of an inner concave surface and an outer convex surface of the groove form the water guide portion.

5. The refrigerator according to any one of claims 1 to 4, wherein a surface of the water guide is provided with a hydrophobic layer.

6. The refrigerator as claimed in claim 1, wherein the plurality of rows of fins are divided into a plurality of layers from top to bottom, and the density of the fins in each layer is decreased from top to bottom.

7. The refrigerator of claim 6, wherein each row of fins at a lower layer is arranged in a row in alignment with the fins at an upper layer.

8. The refrigerator of claim 7, wherein the fins of each layer are uniformly arranged, and the density of the fins of each layer is reduced by half in turn.

9. The refrigerator according to claim 1, wherein the water guide is inclined at an angle ranging from 10 to 45 °.

10. The refrigerator according to claim 1, wherein the width of the water guide is in a range of 1 to 5 mm.