CN118208862A - Evaporator assembly and refrigerator - Google Patents

Abstract

The application discloses an evaporator assembly and a refrigerator, and relates to the technical field of refrigeration appliances. An evaporator assembly according to an embodiment of the application includes a bracket, an evaporator, and a heating tube. The evaporator is arranged on the bracket; the heating pipe is arranged on the bracket and used for heating and defrosting the evaporator, and the heating core of the heating pipe is a resistance sheet material so as to form radiation heating on the evaporator. Because the resistive sheet has directional heating performance, the radiation quantity of the areas which do not need to be heated is less by radiating more heat to the areas which need to be heated, and the loss of the areas which do not need to be heated due to heating is avoided while the heat loss is reduced. By adopting the heating core of the resistance sheet, more heat is emitted in a radiation form during heating, the electromagnetic wave radiation has a short propagation path for transmitting the heat, and the heat loss in propagation is low. Therefore, the heating structure is beneficial to improving deicing and defrosting efficiency, reducing heat loss and reducing the loss of a heating area which is not required to be heated.

Description

Evaporator assembly and refrigerator

Technical Field

The invention belongs to the technical field of refrigeration appliances, and particularly relates to an evaporator assembly and a refrigerator.

Background

When the evaporator in the refrigerating device works, free water molecules in the air can be condensed on the evaporator when the temperature of the surface of the evaporator is low, and a layer of frost can be formed after long time, so that the refrigerating effect is affected, and the defrosting needs to be carried out at intervals.

In order to solve the problems, the prior partial refrigeration device adopts a metal tube or a quartz tube to heat and defrost the evaporator. But are limited by safety standards and heating tube temperatures are limited. These heating pipes are heated mainly by means of thermal convection, and defrosting time is long and efficiency is low. In addition, the distribution of the heat emitted by the heating tube is not ideal, resulting in unnecessary heat loss. For example, in a refrigerator or the like, the heating tube radiates a large amount of heat toward the evaporator, and also radiates a large amount of heat toward the freezing zone, which heats up during defrosting, resulting in slow thawing of the food. Repeated freezing can damage food nutrition, and the longer the defrosting time is, the more serious the food nutrition loss is.

Therefore, the evaporator assembly in the refrigeration apparatus has a certain room for improvement.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention aims to provide an evaporator assembly, which can improve defrosting efficiency and heat distribution.

An object of a second aspect of the present invention is to provide a refrigerator.

An evaporator assembly according to an embodiment of the first aspect of the invention comprises a bracket, an evaporator and a heating tube. The evaporator is arranged on the bracket; the heating pipe is arranged on the support and used for heating and defrosting the evaporator, and the heating core of the heating pipe is a resistance sheet material so as to form radiation heating for the evaporator.

According to the evaporator assembly provided by the embodiment of the application, the heating core of the heating pipe is arranged in the shape of the sheet, so that heat is mainly radiated in the vertical direction of the large surface of the heating core, the directivity is strong, and the radiated heat is more concentrated. Because the resistive sheet has directional heating performance, the radiation quantity of the areas which do not need to be heated is less by radiating more heat to the areas which need to be heated, and the loss of the areas which do not need to be heated due to heating is avoided while the heat loss is reduced. By adopting the heating core of the resistance sheet, more heat is emitted in a radiation form during heating, the electromagnetic wave radiation has a short propagation path for transmitting the heat, and the heat loss in propagation is low. Therefore, the heating structure is beneficial to improving deicing and defrosting efficiency, reducing heat loss and reducing the loss of a heating area which is not required to be heated.

According to some embodiments of the evaporator assembly of the invention, the resistive sheet is a film.

In some embodiments, the resistive sheet is a graphite film.

In some embodiments, the resistive sheet includes a heat generating region including a plurality of heat generating units connected in series, the heat generating units including a first section, a second section, a third section, and a fourth section connected in sequence, two adjacent heat generating units being connected by the first section and the fourth section, the second section and the fourth section extending along a length direction of the resistive sheet, the first section and the third section extending along a width direction of the resistive sheet.

According to some embodiments of the evaporator assembly of the invention, the heating tube further comprises: and the resistance sheet is arranged in the transparent tube.

In some embodiments, the transparent tube is a glass tube, the interior of which is filled with an inert gas.

According to some embodiments of the present invention, the evaporator comprises at least two evaporation tubes, each of the evaporation tubes is arranged along a first direction, and at least two of the evaporation tubes are arranged along a second direction; wherein at least two evaporation pipes are independent pipes, or at least two evaporation pipes are formed by bending a whole pipe, and the first direction is intersected with the second direction; the resistive sheet is disposed to extend in the first direction, and at least one maximum surface of the resistive sheet is disposed toward the evaporation tube.

In some embodiments, the heating tube comprises at least one of a first heating tube and a second heating tube, the first heating tube being located below all of the evaporation tubes, the second heating tube being arranged between at least two of the evaporation tubes along the second direction.

In some embodiments, the evaporator comprises at least two rows of the evaporator tubes arranged in a third direction, the heating tubes comprising the second heating tube between two adjacent rows.

The evaporator assembly according to some embodiments of the present invention further comprises a fin provided on the evaporator, the heating tube further comprising a first heating tube provided through the fin.

A refrigerator according to an embodiment of the second aspect of the present invention includes a refrigerator body and an evaporator assembly as in the above embodiment, the evaporator being configured to cool the cooling chamber.

Through setting up the nutrition that can protect the interior food of refrigerator better of evaporimeter subassembly, improve the performance of refrigerator.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of an evaporator assembly according to some embodiments of the application;

FIG. 2 is a schematic illustration of heat radiation from a heater core according to some embodiments of the application;

FIG. 3 is a schematic view of a heating core and a partially enlarged schematic view thereof according to some embodiments of the present application;

FIG. 4 is another schematic illustration of the structure of a heater core according to some embodiments of the application;

FIG. 5 is a schematic illustration of yet another configuration of a heater core according to some embodiments of the application;

FIG. 6 is a schematic illustration of yet another configuration of a heater core according to some embodiments of the application;

FIG. 7 is a schematic view of yet another configuration of a heater core according to some embodiments of the application;

FIG. 8 is a schematic view of yet another configuration of a heater core according to some embodiments of the application;

FIG. 9 is a schematic connection diagram of connection terminals according to some embodiments of the application;

FIG. 10 is a schematic view of a heating tube structure according to some embodiments of the present application;

FIG. 11 is a schematic illustration of an arrangement of a first heating tube and a second heating tube in accordance with some embodiments of the present application;

FIG. 12 is a schematic illustration of yet another arrangement of a first heating tube and a second heating tube in accordance with some embodiments of the present application;

FIG. 13 is a schematic illustration of yet another arrangement of a first heating tube and a second heating tube in accordance with some embodiments of the present application.

Reference numerals:

An evaporator assembly 100,

A bracket 10, an evaporator 20, an evaporating pipe 2,

The heating tube 30, the first heating tube 31, the second heating tube 32, the heating core 310, the heat generating region 311, the heat generating unit 311A, the first section 311A, the second section 311b, the third section 311c, the fourth section 311d, the first heat generating sub-region 3111, the second heat generating sub-region 3112, the third heat generating sub-region 3113, the fourth heat generating sub-region 3114, the fifth heat generating sub-region 3115, the sixth heat generating sub-region 3116, the intermediate region 312, the connection region 313, the lead 314, the connection terminal 315, the tube head press seal 316, the transparent tube 320,

Fins 40,

A water condensation tray 500 and a drain hole 501.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As described in the background art, in some existing refrigerators, the defrosting heating element mainly includes a metal heating pipe and a quartz heating pipe, and is placed at a position near the water condensation tray at the bottom of the evaporator. In order to ensure that the temperature of the surface of the heating pipe does not exceed 350 ℃ under the requirements of safety mandatory standards, the power of the metal heating pipe and the quartz heating pipe is generally controlled to be about 200W, and the following problems are brought about under the condition:

Firstly, the specific heat capacity of the heating pipe is high, and after the heating pipe is electrified and heated, a part of heat is stored in the heating pipe, so that the heat is difficult to be quickly transferred to the frost on the evaporator.

And secondly, the surface temperature of the heating pipe is low, the radiation duty ratio is small, the heat exchange is mainly carried out through thermal convection, the efficiency is low, and the heating speed is low.

Finally, the heating tube will generally distribute heat evenly throughout 360 degrees along the tube body during heating, resulting in a substantially similar heat distribution toward the evaporator and toward the freezer section. And excessive heat is radiated toward the freezing zone, resulting in excessive temperature in the freezing zone, which causes the frozen food to heat up, even deteriorate, etc.

To solve the above-described problems, an evaporator assembly 100 according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 13. The application of the evaporator assembly 100 is not limited herein, and for example, the evaporator assembly 100 may be applied to a refrigerator, or the evaporator assembly 100 may be applied to other refrigeration apparatuses such as an air conditioner.

As shown in fig. 1, an evaporator assembly 100 according to an embodiment of the present invention includes a bracket 10, an evaporator 20, and a heating pipe 30.

The evaporator 20 is mounted on the stand 10.

A heating pipe 30 is provided on the stand 10 for heating and defrosting the evaporator 20.

The heating tube 30 is different from the conventional heating manner in that the heating core 310 of the heating tube 30 is a resistive sheet to form radiant heating to the evaporator 20.

The resistive sheet is, as the name implies, a resistive material portion which can generate heat when energized, and the resistive material portion is sheet-shaped. Since the resistive material portion has a large surface area and emits a large amount of heat outward, the sheet-like resistive sheet has directional heat generation properties, as shown in fig. 2, that is, the resistive sheet generates a large amount of heat in a direction perpendicular to itself. Therefore, by arranging the heating core 310 of the heating tube 30 as a resistive sheet, the distribution of the heat emitted from the heating tube 30 can be set as appropriate, and the heat can be directed more to the area with high heat demand. For example, when the large surface of the resistive sheet is facing the evaporator 20, the evaporator 20 can obtain more heat, thereby achieving a heating defrost effect. For another example, according to practical tests, it is found that in the evaporator assembly 100, an ice layer is easily generated on the evaporator 20, and an ice layer is also easily generated on the water condensation tray below the evaporator assembly, so that drainage is not smooth, and at this time, the large surface of the resistive sheet can be opposite to the evaporator 20 and the water condensation tray.

By using the resistive sheet heater core 310 in the present embodiment, the heating tube 30 is able to more intensively and directly transfer heat to the evaporator 20, thereby reducing the loss of heat during the transfer process. Meanwhile, the radiation heating mode also avoids the limitation that the traditional heating pipe 30 relies on heat convection for heat exchange, and improves the heating speed and efficiency. And the heating efficiency is improved.

In the evaporator unit 100, heat is generally transferred to the air flowing through the heating pipe 30, and the heated air flows to the evaporator 20 to heat the evaporator 20, so that the efficiency is low and the heat loss is high. In the present application, by providing the heating core 310 of the resistive sheet, the heat of the heating core 310 can be radiated to the outside in the form of electromagnetic waves more, and the electromagnetic wave radiation not only has a short propagation path for transmitting the heat to the evaporator 30, but also has low heat loss in propagation. The combined resistance sheet has directional heating performance, and the distribution proportion of heat radiation can be designed, so that the heating efficiency is further improved, and the heat loss is reduced.

In addition, since the resistive sheet has directional heat generation performance, by radiating heat more to the region to be heated, the amount of radiation of the region not to be heated is small, and the loss of heat is reduced while avoiding the loss of the region not to be heated due to heating, and the like.

According to some embodiments of the present invention, the resistive sheet is a film, i.e., the resistive sheet is a film made of a thin film resistive material. The film resistor material is film resistor material prepared through vacuum deposition, DC or AC sputtering, chemical deposition, etc. and includes Ni-Co resistor film, ta resistor film, si resistor film, cermet resistor film, au-Cr resistor film, ni-P resistor film, etc.

Alternatively, the resistive sheet may also include a metal sheet, such as an iron sheet, a copper sheet, a chromium sheet, a nickel sheet, a tungsten sheet, and the like.

Of course, the resistive sheet of the present application may be any other resistive material known in the art, including carbon materials, ceramic materials, semiconductor materials, clay materials, and the like.

When the resistance sheet is a carbon sheet, it may be a graphite sheet, an activated carbon sheet, a bulk carbon sheet, or the like. When the resistance sheet is a ceramic material sheet, high temperature resistance and corrosion resistance of the ceramic material can be obtained. When the resistive sheet is a sheet of semiconductor material, it may include a silicon wafer, a germanium wafer, or the like. When the resistive sheet is a clay material sheet, it may include a carbon clay sheet, a corona ceramic sheet, a porcelain insulator corona clay sheet, and the like.

In some embodiments, the resistive sheet is a graphite film. Here, the graphite film material has a sheet-like structure having a certain thickness and formed by laminating graphite films, and has characteristics such as high heat generation power and rapid temperature rise.

When the resistance sheet adopts the graphite film material, the heating tube 30 may also be called as a graphite heating tube, and the heating tube 30 has a plurality of advantages:

First, the graphite film material has excellent high temperature stability. The graphite material can keep stable physical and chemical properties in a high-temperature environment due to the high-temperature resistance of the graphite, and is not easy to oxidize, burn through or melt. Therefore, when the graphite film material is used as the heating core 310 of the heating pipe 30, it can be kept stable under high temperature operation, ensuring the normal operation of the evaporator assembly 100.

Secondly, the graphite film material has a relatively high temperature rise speed. Because graphite materials have low thermal loads and thermal inertias, they can respond quickly and generate heat when an electric current is passed through the graphite film material. This allows the heating pipe 30 to quickly reach a desired operating temperature, thereby shortening a defrosting time and improving defrosting efficiency.

Meanwhile, the graphite film material also has higher thermal conductivity and heating uniformity. Due to its excellent heat conducting properties, the graphite film material can rapidly transfer heat to the surface of the evaporator 20, achieving rapid and uniform heating. This helps to reduce heat loss during transfer, improve defrost performance, and avoid localized overheating or temperature non-uniformities on the evaporator 20 surface.

In addition, the graphite film material has the characteristic of rapid cooling. When the heating pipe 30 stops working, most of the heat is rapidly dissipated due to the high thermal conductivity and rapid cooling property of the graphite film, and only the glass and other parts are left to store a small amount of heat. Thus, there is little heat to continue to be dissipated outwardly, which results in a smaller amount of continued temperature rise in the evaporator assembly 100, a feature particularly important during operation of the refrigerator. The heating pipe 30 adopting the graphite film material can effectively avoid continuous rising of the temperature in the refrigerator caused by continuous heating, thereby ensuring the stability of the temperature in the refrigerator and ensuring good preservation effect of food.

Through practical measurement and calculation, under the same conditions, the applicant team compares the application effects of two heating pipes 30 made of different materials in the defrosting process of the refrigerator.

In test 1, with a conventional metal heating tube, the defrosting heating time was as long as 24 minutes, the temperature rise during heating reached 9.7 ℃, while during the stopping of heating, the temperature rise was still 7.1 ℃, which resulted in a total no-load maximum defrosting temperature rise of 16.8 ℃. Such a result means that defrosting requires a long waiting time and high power consumption, and at the same time, temperature fluctuation is large, possibly affecting the stability of the temperature inside the refrigerator.

In test 2, the defrosting heating time is shortened to 11 minutes by adopting the heating pipe 30 provided by the embodiment of the application, meanwhile, the temperature rise in the heating period is controlled to be 5.2 ℃, the temperature rise in the heating stopping period is 3.5 ℃, the total no-load maximum defrosting temperature rise is only 8.7 ℃, and the temperature rise is reduced by nearly half compared with the metal heating pipe.

By improving the heating pipe 30, not only the defrosting efficiency is improved, but also the energy consumption required by defrosting is reduced, and meanwhile, the temperature fluctuation is smaller, so that the temperature stability in the refrigerator is maintained.

In some embodiments, the heating tube 30 comprises a sheet-like resistive sheet. The resistance sheet is formed into a sheet shape, so that the problem of overlarge total power caused by smaller resistance can be avoided, the overlarge power density of the heating area 311 of the resistance sheet is avoided, and the service life of the heating core 310 is prolonged.

In some embodiments, as shown in fig. 3, the resistive sheet includes a heat generating region 311, the heat generating region 311 includes a plurality of heat generating units 311A connected in series, the heat generating units 311A include a first section 311A, a second section 311b, a third section 311c, and a fourth section 311d connected in sequence, two adjacent heat generating units 311A are connected by the first section 311A and the fourth section 311d, the second section 311b and the fourth section 311d are disposed to extend in a length direction of the resistive sheet, and the first section 311A and the third section 311c are disposed to extend in a width direction of the resistive sheet.

The arrangement is such that the first section 311A, the second section 311b, the third section 311c and the fourth section 311d are sequentially connected to form a relief structure, and since the plurality of heat generating units 311A are connected in series, the first section 311A and the fourth section 311d of the adjacent heat generating units 311A are connected together, the heat generating region 311 forms a continuous relief structure. It is understood that the connection herein means that the first section 311A, the second section 311b, the third section 311c and the fourth section 311d are combined together, for example, the first section 311A, the second section 311b, the third section 311c and the fourth section 311d may be integrally formed, and the plurality of heat generating units 311A also constitute an integrally formed structure.

Along the length of the resistive sheet, at least a portion of the resistive sheet forms a continuous undulating structure. Because the second section and the fourth section of the resistor sheet extend in the same direction along the length direction of the resistor sheet, and the first section and the third section extend in the same direction, the resistor sheet can have larger heating area without reducing the resistance under the condition of limited extending length of the resistor sheet.

The second section 311b and the fourth section 311d extend substantially along the length direction of the resistive sheet, and the first section 311A and the third section 311c extend substantially perpendicular to the length direction, so that the structure of the first section 311A, the second section 311b, the third section 311c and the fourth section 311d in the heat generating unit 311A is convenient to process, the overall structure is more stable, and space can be maximally utilized.

As shown in fig. 3-9, in some embodiments of the present application, the resistive sheet further includes a connection region 313, the connection region 313 is located at an end of the resistive sheet, and the connection region 313 is configured to electrically connect the heating core 310 and an external component, for example, the connection region 313 is configured to provide a supporting point for the fixing lead 314, the lead 314 may be fixed to the connection region 313, and the other end of the lead 314 may be connected to another component (for example, a connection terminal 315). By providing the connection region 313, the energization of the heating core 310 is conveniently achieved.

In some embodiments, the resistive sheet radiates heat primarily through the heat generating region 311, and the heat generating region 311 includes a plurality of heat generating units 311A, and calculating the total resistance of the heat generating region 311 may be performed by summing the resistances of the respective heat generating units 311A.

In some embodiments, as shown in FIG. 4, a plurality of heat generating regions 311 are included in the resistive sheet in succession, and a first heat generating sub-region 3111, a second heat generating sub-region 3112, and a third heat generating sub-region 3113 are included in the plurality of heat generating regions 311, respectively. The first heat-generating sub-area 3111 is disposed in the middle of the resistive sheet, two second heat-generating sub-areas 3112 are disposed at two ends of the first heat-generating sub-area 3111, two third heat-generating sub-areas 3113 are disposed at one end of the second heat-generating sub-area 3112 away from the first heat-generating sub-area 3111. Wherein the density of the heat generating units 311A in the first heat generating sub-region 3111 is ρ1, the density of the heat generating units 311A in the second heat generating sub-region 3112 is ρ2, and the density of the heat generating units 311A in the third heat generating sub-region 3113 is ρ3, satisfying ρ3 < ρ1 < ρ2. Thus arranged, the first heat generating sub-region 3111 is located in the middle of the resistive sheet, and the density ρ1 of the heat generating units 311A thereof is moderate. This means that the heating effect of the middle section is stable and not too strong, thereby avoiding the problem of overheating of the middle section, ensuring that the middle section can be heated uniformly and effectively without unnecessary energy waste. Next, second heat generating sub-regions 3112 are respectively disposed at both ends of the first heat generating sub-region 3111, wherein a density ρ2 of the heat generating units 311A in the second heat generating sub-region 3112 is greater than ρ1. This means that the heating amount of the second heat generating sub-region 3112 is enhanced as compared to the first heat generating sub-region 3111, so that the second heat generating sub-region 3112 can provide a stronger heating effect at both ends, thereby more rapidly reaching a temperature required for defrosting, shortening a defrosting time, and improving defrosting efficiency. Finally, the third heat generating sub-region 3113 is located at the outermost side of the resistive sheet, and the larger the material volume per unit length, the higher the heat generation amount. Therefore, the heat quantity of the middle part is less, the heat quantity of the edge is more, and the heat distribution is more balanced.

In some embodiments as shown in fig. 5, the resistive sheet includes two fourth heat generating sub-regions 3114 and an intermediate region 312, the intermediate region 312 is disposed between the two fourth heat generating sub-regions 3114, and both ends of the intermediate region 312 are electrically connected to the two fourth heat generating sub-regions 3114, respectively. That is, the resistive sheet is designed in sections along the length direction, wherein the fourth heat generating region 311 is designed according to the length most suitable for generating heat, and the middle region 312 is used as a transitional connection, and the middle region 312 separates the two fourth heat generating regions 311, so as to avoid excessive heat concentration. Since the temperature of the heater core 310 near the middle of the heater core 310 is higher when the heater core 310 radiates heat to the evaporator 20, the two adjacent fourth heat generating areas 311 are separated by the middle area 312, so that the heat radiated from the heater core 310 is more uniform. In addition, the length of the middle area 312 can be adjusted according to different scenes, so that the interval length of two adjacent fourth heating areas 311 is adapted to change, thereby realizing dynamic distribution of heating amount change.

In some embodiments as shown in fig. 6, the resistive sheet includes a second heat generating sub-region 3112 in the middle and two third heat generating sub-regions 3113 disposed at two ends of the second heat generating sub-region 3112, respectively, wherein a length L2 of the second heat generating sub-region 3112 is greater than a length L3 of each of the third heat generating sub-regions 3113, which is configured to enable stability of heating at the middle position and assistance of large heating amounts at the two ends.

In some embodiments, as shown in fig. 7, the resistive sheet includes a plurality of first heat generating sub-regions 3111, intermediate regions 312 alternately disposed between the first heat generating sub-regions 3111, and third heat generating sub-regions 3113 disposed at both ends of the resistive sheet. Wherein the middle region 312 in the middle of the resistive sheet to the middle region 312 at the ends gradually decrease in length. This arrangement not only ensures that the first heat generating sub-region 3111 can continuously distribute heat, but also effectively avoids excessive concentration of heat by the arrangement of the intermediate region 312. The decreasing profile is presented in length from the middle region 312 in the middle of the resistive sheet to the middle region 312 at the ends. Meanwhile, by gradually reducing the length of the intermediate zone 312, the heating effect from the middle portion to the end portions can be gradually enhanced. The main function of the intermediate region 312 is to isolate and disperse the heat generated from the first heat generating sub-region 3111, preventing excessive concentration of the heat. And the third heat generating sub-region 3113 is located at the outermost side of the resistive sheet, the larger the material volume per unit length, the higher the heat generation amount. Thereby, a small amount of middle heat generation and a large amount of edge heat generation are realized, so that the evaporator assembly 100 can maintain the heating effect during heating.

In some embodiments as shown in fig. 8, the resistive sheet includes a fifth heat generating sub-region 3115 in the middle and two sixth heat generating sub-regions 3116 disposed at both ends thereof, respectively. Wherein the width of the heat generating unit 311A in the fifth heat generating sub-region 3115 is greater than the width of the heat generating unit 311A in the sixth heat generating sub-region 3116. The lifting of the heating amount of the middle part is realized by adjusting the width of the heating unit 311A, so that the resistance sheet can form temperature distribution with larger heating amount of the middle part and smaller heating amount at two ends when being heated.

In short, the heating amount of the resistive sheet can be adjusted in various ways. For example, the adjustment of the heating amount can be achieved by adjusting the density of the heat generating units 311A, adjusting the width of the heat generating units 311A, and providing the intermediate region 312 in the resistive sheet. The adjustment modes are single or combined, so that the layout optimization of the heating quantity of the resistance sheet can be effectively realized, and the adjustment modes belong to the protection scope of the technical scheme of the application.

As shown in fig. 10 for the evaporator assembly 100 according to some embodiments of the present invention, the heating tube 30 further includes a transparent tube 320, and the resistive sheet is disposed within the transparent tube 320.

The inside of the transparent tube 320 is filled with an inert gas. By providing the transparent tube 320, protection is provided to the resistive sheet from shock and the probability of breakage of the resistive sheet is reduced. And the probability of surface oxidation of the resistance sheet at high temperature can be avoided.

In some alternative embodiments, as shown in fig. 9-10, the transparent tube 320 may be a glass tube, the resistive sheet is disposed inside the transparent tube 320, two ends of the resistive sheet are respectively connected to the lead wires 314, two ends of the outer tube are respectively provided with a connection terminal 315, the lead wires 314 are connected to the connection terminal 315, and the connection terminal 315 is adapted to be connected to other power supply components.

In some alternative embodiments, the transparent tube 320 is filled with an inert gas, which may be helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), or the like, so that the resistor sheet is in a state of heating at a high temperature when energized, and the protection of the resistor sheet can be achieved by the arrangement of the inert gas, so that the service life of the resistor sheet is prolonged.

In some embodiments, as shown in fig. 10, the heating tube 30 further includes a tube head press 316 for sealing off the ends of the heating tube 30.

According to the evaporator assembly 100 of some embodiments of the present invention, as shown in fig. 11, the evaporator 20 includes at least two evaporation tubes 2, each evaporation tube 2 is disposed to extend in a first direction, and at least two evaporation tubes 2 are arranged in a second direction.

The evaporating pipe 2 extends along the first direction, can be fully unfolded, and increases the contact area between the evaporating pipe and the inside of the refrigerator, so that the refrigerating efficiency of the refrigerator is improved.

At least two evaporation tubes 2 are arranged in the second direction. The arrangement is such that a certain interval is formed between the evaporating pipes 2, which is beneficial to air circulation and heat exchange. Meanwhile, by reasonably adjusting the distance between the evaporating pipes 2 in the second direction, the overall performance of the evaporator 20 can be further optimized, so that the evaporator can maintain a stable cooling effect under different working environments.

Wherein, at least two evaporating pipes 2 are independent pipes, or at least two evaporating pipes 2 are formed by bending a whole pipe, and the first direction is intersected with the second direction. Therefore, through the arrangement, the layout of the evaporation tube 2 can be more reasonable, and the assembly efficiency between the evaporation tube 2 and the bracket 10 is improved.

The resistive sheet is arranged to extend in a first direction, as shown in fig. 12, with at least one maximum surface of the resistive sheet being arranged towards the evaporation tube 2. By arranging the maximum surface of the resistive sheet toward the evaporation tube 2, it is ensured that heat can be directly and effectively transferred to the evaporation tube 2, and defrosting efficiency is improved.

In some embodiments, the heating tube 30 comprises at least one of a first heating tube 31 and a second heating tube 32, the first heating tube 31 being located below all the evaporation tubes 2. So that the first heating pipe 31 can directly heat the evaporation pipe 2, and heat can be rapidly and uniformly transferred to the evaporation pipe 2, thereby improving heat exchange efficiency.

The second heating pipes 32 are arranged between at least two evaporation pipes 2 in the second direction. In this way, the second heating pipe 32 can directly heat the air between the evaporation pipes 2, accelerating the speed of air flow and heat exchange. By properly setting the number and positions of the second heating pipes 32, the heating effect and cooling performance of the evaporator assembly 100 can be further optimized.

In some embodiments, as shown in fig. 13, the evaporator 20 comprises at least two rows of evaporator tubes 2 arranged in a third direction, and the heating tube 30 comprises a second heating tube 32 located between adjacent rows. The second heating pipe 32 is arranged between two adjacent rows of the evaporating pipes 2, so that heat can be directly and uniformly transferred to the evaporating pipes 2, and heat exchange efficiency is improved. Thereby, the heat conduction distance between the second heating pipe 32 and the evaporation pipe 2 is minimized, and the heat loss is minimized, thereby achieving an efficient heating effect. Meanwhile, the temperature rise of defrosting is reduced, the defrosting time is correspondingly shortened, and the energy consumption required by defrosting can be reduced.

The evaporator assembly 100 according to some embodiments of the present invention as shown in fig. 1, 11 and 13 further includes a fin 40 provided on the evaporator 20, and the heating tube 30 further includes a first heating tube 31, the first heating tube 31 being disposed through the fin 40. Specifically, the fins 40 can increase the heat exchange area of the evaporator 20, improve the cooling effect of the refrigerator, and shorten the cooling time. When the temperature on the evaporator 20 is too low, the surface of the fins 40 is frosted, at this time, the first heater heats, heat generated by the first heater is transferred to the surface of the fins 40, and frost or snow on the fins 40 is heated and quickly melted, so that the defrosting effect of the evaporator 20 can be achieved, and the evaporator 20 can normally operate.

A refrigerator according to an embodiment of the second aspect of the present invention includes a cabinet and an evaporator assembly 100, the evaporator 20 for refrigerating a refrigerating chamber.

By providing the evaporator assembly 100 according to the embodiment of the first aspect of the present application, the advantages of shorter defrosting time, reduced defrosting temperature rise and reduced defrosting energy consumption are achieved, and the working efficiency of the evaporator assembly 100 is improved, thereby improving the performance of the refrigerator.

In some embodiments, a condensate tray 500 is also included, the condensate tray 500 being located below the evaporator 20. The water condensation tray 500 can effectively receive melted frost water to prevent it from dripping to other parts of the inside of the refrigerator, thereby maintaining the inside of the refrigerator clean and dry.

Optionally, a drain hole 501 is provided on the condensate tray 500 for draining water received by the condensate tray 500.

Referring now to fig. 1-3, 9-13, an evaporator assembly 100 in accordance with one embodiment of the present application is described.

Referring to fig. 1, the evaporator assembly 100 includes: a bracket 10, an evaporator 20, a heating tube 30 and fins 40.

The evaporator 20 and the heating pipe 30 are both mounted on the bracket 10.

The evaporator 20 includes: a plurality of evaporating pipes 2. Some of the evaporation tubes 2 extend along the first direction, some of the evaporation tubes 2 are arranged along the second direction, and some of the evaporation tubes 2 are arranged in two rows along the third direction.

Referring to fig. 11 to 13, the heating pipe 30 includes: a first heating tube 31 and a second heating tube 32. The first heating pipes 31 are located below all the evaporation pipes 2, the second heating pipes 32 are arranged between at least two evaporation pipes 2 in the second direction, and at the same time, the second heating pipes 32 are also located between two rows of evaporation pipes 2 arranged in the third direction.

The first heating tube 31 and the second heating tube 32 are disposed through the fins 40.

Referring to fig. 10, each heating pipe 30 includes: a heating core 310 and a transparent tube 320.

Referring to fig. 12, the heating core 310 is a resistive sheet, which is disposed to extend in a first direction, and at least one maximum surface of the resistive sheet is disposed toward the corresponding evaporation tube 2.

Referring to fig. 3, the heating core 310 includes: two heat generating regions 311, an intermediate region 312, a connection region 313, a lead 314, and a connection terminal 315.

Referring to fig. 9, the lead 314 is connected to a connection terminal 315, and the connection terminal 315 is adapted to be connected to other power supply components.

Referring to fig. 3, an intermediate region 312 is disposed between two heat generating regions 311,

Each heat generation region 311 comprises: a plurality of heat generating units 311A connected in series.

Referring to fig. 3, the heat generating unit 311A includes: the first section 311A, the second section 311b, the third section 311c, and the fourth section 311d which are sequentially connected, two adjacent heat generating units 311A are connected through the first section 311A and the fourth section 311d, the second section 311b and the fourth section 311d are arranged to extend in the length direction of the resistive sheet, and the first section 311A and the third section 311c are arranged to extend in the width direction of the resistive sheet.

The connection region 313 is located at an end of the resistive sheet, and the connection region 313 is provided to enable energization of the heater core 310.

The inside of the transparent tube 320 is filled with an inert gas.

Other constructions of the evaporator assembly 100, such as a refrigerator, according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. An evaporator assembly, comprising:

a bracket;

the evaporator is arranged on the bracket;

the heating pipe is arranged on the support and used for heating and defrosting the evaporator, and a heating core of the heating pipe is a resistance sheet so as to form radiation heating for the evaporator.

2. The evaporator assembly of claim 1, wherein the resistive sheet is a film.

3. The evaporator assembly of claim 2, wherein the resistive sheet is a graphite film.

4. The evaporator assembly of claim 2, wherein the resistive sheet comprises a heat generating region comprising a plurality of heat generating cells connected in series, the heat generating cells comprising a first section, a second section, a third section, and a fourth section connected in sequence, adjacent two of the heat generating cells being connected by the first section and the fourth section, the second section and the fourth section extending along a length of the resistive sheet, the first section and the third section extending along a width of the resistive sheet.

5. The evaporator assembly of claim 1, wherein the heating tube further comprises: and the resistance sheet is arranged in the transparent tube.

6. The evaporator assembly of claim 5, wherein the transparent tube is a glass tube, and an interior of the transparent tube is filled with an inert gas.

7. The evaporator assembly of any one of claims 1-6, wherein the evaporator comprises at least two evaporator tubes, each evaporator tube extending in a first direction, the at least two evaporator tubes being arranged in a second direction; wherein at least two evaporation pipes are independent pipes, or at least two evaporation pipes are formed by bending a whole pipe, and the first direction is intersected with the second direction;

The resistive sheet is disposed to extend in the first direction, and at least one maximum surface of the resistive sheet is disposed toward the evaporation tube.

8. The evaporator assembly of claim 7, wherein the heating tubes comprise at least one of a first heating tube and a second heating tube, the first heating tube being positioned below all of the evaporator tubes, the second heating tube being arranged between at least two of the evaporator tubes in the second direction.

9. The evaporator assembly of claim 8, wherein the evaporator comprises at least two rows of the evaporator tubes arranged in a third direction, the heating tubes comprising the second heating tube between two adjacent rows.

10. The evaporator assembly of any of claims 1-6, further comprising a fin provided on the evaporator, the heating tube further comprising a first heating tube disposed through the fin.

11. A refrigerator, comprising:

the box body is internally provided with a refrigerating chamber;

The evaporator assembly of any of claims 1-10, the evaporator being used to cool the refrigeration chamber.