CN210772965U - Freezing and refrigerating device - Google Patents

Abstract

The embodiment of the utility model discloses freezing cold storage plant relates to freezing cold storage plant technical field. The refrigerator is used for solving the problem that the rear wall of the evaporator bin of the freezing and refrigerating device in the related art is easily damaged by heat. This freezing and refrigerating device, including the evaporimeter storehouse and all set up in evaporimeter in the evaporimeter storehouse with change the frost heater, it includes body and heating member to change the frost heater, the body has the link, the heating member set up in the below of evaporimeter, and with the link is connected, the heating member is the space heliciform, and the spiral direction of advance of heating member with the thickness direction of evaporimeter is parallel. The utility model can be used for defrosting the evaporator of the freezing and refrigerating device such as a refrigerator, a freezer and the like.

Description

Freezing and refrigerating device

Technical Field

The utility model relates to a freezing cold storage plant technical field especially relates to a freezing cold storage plant.

Background

An evaporator of a freezing and refrigerating device such as a refrigerator can form a frost layer on the surface of a fin of the evaporator after being used for a period of time, the frost layer is thicker and thicker along with the running of the freezing and refrigerating device, if the accumulated thickness of the frost layer is too large, the heat exchange efficiency of the evaporator can be directly influenced, in order to eliminate the influence of the frost layer on the heat exchange efficiency of the evaporator, a defrosting heater is arranged on the freezing and refrigerating device, and when the accumulated working time of the freezing and refrigerating device reaches a certain value, the defrosting heater is heated to defrost the frost layer attached to the fin of the evaporator. Among them, how to design a defrosting heater becomes an important issue in the development of a refrigerating and freezing apparatus.

As shown in fig. 1, the defrosting heater of the related art includes a body 01 and a heating pipe 02, the body 01 has a connection end 011, and the heating pipe 02 is disposed below an evaporator 03 and connected to the connection end 011. As shown in fig. 2, the heating pipe 02 includes a front-row heating pipe 021 and a rear-row heating pipe 022, the front-row heating pipe 021 includes first upper heating pipe 0211, first lower heating pipe 0212 and connects in first return bend 0213 between the two, the rear-row heating pipe 022 includes second upper heating pipe 0221, second lower heating pipe 0222 and connects in second return bend 0223 between the two, first upper heating pipe 0211 is connected with second upper heating pipe 0221 through third return bend 023, first lower heating pipe 0212, second lower heating pipe 0222 all are connected with the link end 011.

The inventor finds that: in the defrosting heater, as shown in fig. 2, the front heating pipe 021 and the rear heating pipe 022 are connected by a third bent pipe 023, and the third bent pipe 023 needs to be set with a certain radius to ensure smooth transition connection between the first upper heating pipe 0211 and the second upper heating pipe 0221 (if the radius of the third bent pipe 023 is set too small, the first upper heating pipe 0211 and the second upper heating pipe 0221 are easily broken during manufacturing). Due to the third bend 023, the size of the heating tube 02 in the thickness direction X of the evaporator is larger, the heating tube 02 is closer to the rear wall of the evaporator bin (i.e. the tank, not shown in the figure), when the rear wall of the evaporator bin is made of EPS foam (polystyrene foam) material and the defrosting heater works, the temperature of the surface of the foam material of the rear wall of the evaporator bin is higher, can reach about 90 ℃, which causes serious vitrification deformation of the foam material on the rear wall of the evaporator bin (the foam vitrification phenomenon means that the foam surface can deform after the foam is subjected to high temperature, and a plurality of small particles are generated on the foam surface), thereby causing structural damage to the rear wall of the evaporator compartment which, in turn, not only reduces the thermal insulation properties of the rear wall of the evaporator compartment but also increases the frequency of maintenance of the refrigeration and freezing apparatus.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a freezing and cold storage device for solve the problem of the damage by heating easily of the back wall in freezing and cold storage device's the evaporimeter storehouse among the correlation technique.

In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a refrigeration and cold storage device, a wind circulation system of the refrigeration and cold storage device includes an evaporator bin and a defrosting heater, the defrosting heater includes a body and a heating member, the body has a connecting end, the heating member set up in the below of the evaporator, and with the connecting end is connected, the heating member is a space spiral shape, and the spiral advancing direction of the heating member is parallel to the thickness direction of the evaporator.

The embodiment of the utility model provides a freezing and refrigerating device, because the heating member is the space heliciform, and the spiral direction of advance of heating member is parallel with the thickness direction of evaporimeter, thus, just can adjust the pitch of heating member according to the installation condition of the reality of defrosting heater, avoid heating member at the ascending size in the thickness direction of evaporimeter too big, then, under the certain condition of thickness size in evaporimeter storehouse, after this defrosting heater is installed in the evaporimeter storehouse, just can be so that the distance between the back wall in heating member and evaporimeter storehouse keeps in safe within range, avoid leading to the back wall high temperature in evaporimeter storehouse and damaging because of the distance undersize between the back wall in heating member and evaporimeter storehouse. Thus, not only is the thermal insulation performance of the rear wall of the evaporator bin ensured, but also the frequency of maintenance of the refrigerating and freezing apparatus is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view illustrating an assembly of a defrosting heater and an evaporator in the related art;

FIG. 2 is a schematic structural view of a defrosting heater in the related art;

fig. 3 is a schematic cross-sectional view of a refrigerator according to an embodiment of the present invention;

fig. 4 is an assembly schematic diagram of a defrosting heater and an evaporator in a refrigerator according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a defrosting heater according to an embodiment of the present invention;

fig. 6 is a front view of the defrosting heater according to the embodiment of the present invention;

fig. 7 is a top view of a heating element of a defrosting heater according to some embodiments of the present invention;

fig. 8 is a top view of a heating element of a defrosting heater according to further embodiments of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The embodiment of the utility model provides a freezing and cold storage device can be the refrigerator, also can be for evaporimeter such as refrigerator-freezer, fridge need the frost heater defrosting to the freezing and cold storage device of the inner wall in evaporimeter storehouse is harmd easily to the high temperature of defrosting heater.

The principle of the present invention is described below by taking a refrigerator as an example:

fig. 3 is a cross-sectional view of a refrigerator according to an embodiment of the present invention, the air circulation system of the refrigerator includes an evaporator chamber 200 and an evaporator 300 disposed in the evaporator chamber 200, the air circulation system of the refrigerator further includes a blower (not shown in the figure), when the refrigerator is in operation, the blower sucks air in the refrigerator chamber 400 into the evaporator chamber 200, and exchanges heat with the evaporator 300 to form cold air, and the cold air enters the refrigerator chamber 400 again through an air outlet along an air duct to form air circulation.

As shown in fig. 3, the air circulation system of the refrigerator further includes a defrosting heater 100, the defrosting heater 100 is disposed in the evaporator compartment 200; as shown in fig. 4 and 5, the defrosting heater 100 includes a body 1 and a heating member 2, the body 1 has a connection end 11 (i.e., a cold end), the heating member 2 is disposed below the evaporator 300 and connected to the connection end 11, the heating member 2 has a spatial spiral shape, and a spiral advancing direction m of the heating member 2 is parallel to a thickness direction Z of the evaporator 300.

It should be noted that: the spiral advancing direction m of the heating member 2 can be determined by the right-hand spiral rule, the four fingers bent by the right hand point to the spiral direction of the heating member 2, and the point of the thumb is the spiral advancing direction m of the heating member 2. The spiral advancing direction m of the heating element 2 may be directed to the rear wall of the evaporator bin 200 (as shown in fig. 3) or away from the rear wall of the evaporator bin 200, and is not particularly limited herein.

As shown in fig. 5, the defrosting heater 100 further includes a temperature sensor 3 (as shown in fig. 6), a fuse 4 and an electrical connector 5, wherein the temperature sensor 3, the fuse 4 and the electrical connector 5 are all connected with the body 1, the electrical connector 5 is used for being electrically connected with a power supply end of the refrigerator, and the fuse 4 and the temperature sensor 3 are arranged on the fins 320 of the evaporator 300. In the operation process of the refrigerator, as shown in fig. 4 and 6, a liquid refrigerant flows through the heat exchange tube 310 of the evaporator 300 to be gasified and absorb heat so as to reduce the temperature on the fins 320 of the evaporator 300, frost is formed on the fins 320 of the evaporator 300 after being cooled for a long time, and when the temperature sensor 3 detects that the temperature on the fins 320 of the evaporator 300 is lower than a defrosting temperature point, the heating element 2 is electrified and heated so as to melt the frost on the evaporator 300, thereby achieving the purpose of defrosting; when the temperature of the fin 320 is higher than a preset upper limit value, the fuse 4 cuts off the power supply to cut off the power supply to the heating element 2 to stop heating, so as to protect the fin 320 from being damaged by high temperature.

In the defrosting heater 100, since the heating member 2 has a spatial spiral shape, and the spiral advancing direction m of the heating member 2 is parallel to the thickness direction Z of the evaporator 300, in this way, the pitch (i.e., the distance between the first upper heating member 211 and the second upper heating member 212 shown in fig. 7) and the number of turns of the heating member 2 can be adjusted according to the actual installation of the defrosting heater 100, and the size of the heating member 2 in the thickness direction Z of the evaporator 300 is prevented from being excessively large, and then, as shown in fig. 3, in the case that the thickness dimension of the evaporator compartment 200 is constant, after the defrosting heater 100 is installed in the evaporator compartment 200, the distance d between the heating element 2 and the rear wall 210 (i.e. the tank container) of the evaporator bin 200 can be kept within a safe range, and damage caused by over-high temperature of the rear wall 210 of the evaporator bin 200 due to over-small distance d between the heating element 2 and the rear wall 210 of the evaporator bin 200 can be avoided. In this way, not only is the thermal insulation performance of the rear wall 210 of the evaporator bin 200 ensured, but also the frequency of maintenance of the refrigerating and freezing apparatus is reduced.

It has been found through research that, as shown in fig. 3, when the distance d between the heating element 2 and the rear wall 210 of the evaporator bin 200 is greater than 10mm, the temperature of the rear wall 210 of the evaporator bin 200 can be maintained within a safe range, so that damage caused by an excessively high temperature of the rear wall 210 of the evaporator bin 200 due to an excessively small distance d between the heating element 2 and the rear wall 210 of the evaporator bin 200 can be well avoided. Further research shows that when the distance d between the heating element 2 and the rear wall 210 of the evaporator bin 200 is 27mm, the temperature of the surface of the foam material at the rear wall 210 of the evaporator bin 200 is kept at about 60 ℃, and the rear wall 210 of the evaporator bin 200 does not turn yellow or scorch, and the like, so that the rear wall 210 of the evaporator bin 200 can be better prevented from being damaged due to overhigh temperature.

In the defrosting heater 100 described above, the structure of the heating member 2 is not exclusive, and for example, the structure of the heating member 2 may be as follows: the number of turns of the heating member 2 is 2, and as shown in fig. 4 and 5 in particular, the heating member 2 includes an upper heating member 21 and a lower heating member 22 located below the upper heating member 21; the upper heating member 21 includes a first upper heating member 211 and a second upper heating member 212 each having an elongated shape, the first upper heating member 211 and the second upper heating member 212 each extending in the width direction Y of the evaporator 300 and being provided at intervals in the thickness direction Z of the evaporator 300; the lower heating member 22 includes a first lower heating member 221 and a second lower heating member 222 each having an elongated shape, the first lower heating member 221 and the second lower heating member 222 each extending in the width direction Y of the evaporator 300 and being provided at intervals in the thickness direction Z of the evaporator 300; the heating member 2 further includes a first turning portion 23, a second turning portion 24 and a third turning portion 25, the first upper heating member 211, the first turning portion 23, the first lower heating member 221, the second turning portion 24, the second upper heating member 212, the third turning portion 25 and the second lower heating member 222 are sequentially connected to form a space spiral shape, one end of the first upper heating member 211, which is far away from the first turning portion 23, and one end of the second lower heating member 222, which is far away from the third turning portion 25, are connected to the connection end 11.

In addition, the structure of the heating member 2 may also be as follows: the number of turns of the heating member 2 is 3, and specifically as shown in fig. 8, the upper heating member 21 includes a first upper heating member 211, a second upper heating member 212, and a third upper heating member 213, all of which are elongated, the first upper heating member 211, the second upper heating member 212, and the third upper heating member 213 all extending in the width direction Y of the evaporator 300 and being provided at intervals in the thickness direction Z of the evaporator 300; the lower heating member 22 includes a first lower heating member 221, a second lower heating member 222, and a third lower heating member 223 each having an elongated shape, the first lower heating member 221, the second lower heating member 222, and the third lower heating member 223 each extending in the width direction Y of the evaporator 300 and being provided at intervals in the thickness direction Z of the evaporator 300; the heating member 2 further includes a first turning portion 23, a second turning portion 24, a third turning portion 25, a fourth turning portion 26 and a fifth turning portion 27, a first upper heating member 211, the first turning portion 23, a first lower heating member 221, the second turning portion 24, a second upper heating member 212, a third turning portion 25, a second lower heating member 222, the fourth turning portion 26, a third upper heating member 213, the fifth turning portion 27, a third lower heating member 223 connected in sequence, so as to be in a space spiral shape, and one end of the first upper heating member 211 far away from the first turning portion 23, one end of the third lower heating member 223 far away from the fifth turning portion 27 is connected with the connecting end 11.

Compared with the embodiment that the number of turns of the heating element 2 is 3, in the embodiment that the number of turns of the heating element 2 is 2, the total length of a heating part in the heating element 2 is relatively short, so that the total power consumption of the defrosting heater 100 can be reduced, and the energy saving of the freezing and refrigerating device is facilitated; meanwhile, when the number of turns of the heating member 2 is 2, the size of the heating member 2 in the thickness direction Z of the evaporator 300 is smaller, which is more favorable for keeping the distance between the heating member 2 and the rear wall 210 of the evaporator compartment 200 within a safe range, and better avoids the damage caused by the over-high temperature of the rear wall 210 of the evaporator compartment 200 due to the over-small distance between the heating member 2 and the rear wall 210 of the evaporator compartment 200.

It should be noted that: the width direction Y of the evaporator 300 is a direction perpendicular to both the height direction V and the thickness direction Z of the evaporator 300, and is shown in fig. 4, for example.

In the embodiment in which the number of turns of the heating member 2 is 2, as shown in fig. 4, the first upper heating member 211 and the second lower heating member 222 are located at different heights, and if one end of the first upper heating member 211, which is far away from the first turning portion 23, is directly connected to the connection end 11, the connection point between the first upper heating member 211 and the connection end 11 and the connection point between the second lower heating member 222 and the connection end 11 are located at different heights, so that the connection end 11 needs to be connected to the first upper heating member 211 and the second lower heating member 222 at different heights, which causes inconvenience in connecting the connection end 11 and the heating member 2. In order to solve the above problem, as shown in fig. 4, the heating member 2 further includes a connecting heating member 28, one end of the first upper heating member 211, which is away from the first turn portion 23, is connected to the connecting end 11 by the connecting heating member 28, and a connecting point of the connecting heating member 28 to the connecting end 11 and a connecting point of the second lower heating member 222 to the connecting end 11 are located at the same height. Through setting up the connection heating member 28 for the tie point of connecting heating member 28 and link 11, second lower heating member 222 are located the same height with the tie point of link 11, and the link 11 just so can be on the same height with connect heating member 28, second lower heating member 222 and be connected respectively, has made things convenient for being connected of link 11 and heating member 2.

The shape of the connecting heating element 28 is also not exclusive, and for example, the connecting heating element 28 may have the following shape: as shown in fig. 4, the connecting heating member 28 includes a first connecting section 281 and a second connecting section 282, both of which are elongated and connected at a predetermined angle, the first connecting section 281 being connected to the connecting end 11, and the second connecting section 282 being connected to the first upper heating member 211. In addition, the connecting heating member 28 may have the following shape: the connecting heating member 28 is in an elongated curved shape, for example, in an S-shape, and one end of the connecting heating member 28 is connected to the connecting end 11 and the other end is connected to the first upper heating member 211. Compared with the connecting heating member 28 having a slender curved shape, the shape of the connecting heating member 28 shown in fig. 4 does not need to be made into a curved shape, which reduces the difficulty of making the connecting heating member 28, thereby facilitating to reduce the manufacturing cost of the connecting heating member 28.

In order to make the heating member 2 heat the evaporator 300 more uniformly in the width direction Y of the evaporator 300, as shown in fig. 4 and 7, the end portion a of the first lower heating member 221 connected to the second turn portion 24 extends to between the connecting heating member 28 and the second lower heating member 222 in the thickness direction Z of the evaporator 300, and is disposed at a distance from the connecting heating member 28 and the second lower heating member 222. Since the end part a of the first lower heating member 221 connected with the second turning part 24 extends to between the connecting heating member 28 and the second lower heating member 222, the end part a of the first lower heating member 221 and the second turning part 24 can avoid the connecting heating member 28 and approach to the left end part of the evaporator 300, so that the heat generation amount of the heating member 2 at the left end part of the evaporator 300 can be increased, thereby maximally reducing the difference of the heat receiving amount at the two ends of the evaporator 300 in the width direction, so that the heating member 2 can heat the evaporator 300 more uniformly in the width direction Y of the evaporator 300.

As shown in fig. 4, the air circulation system of the freezing and refrigerating device further includes a water pan 500, the water pan 500 is disposed in the evaporator bin 200 and located at the bottom of the evaporator 300, the water pan 500 has a water outlet 510, the heating element 2 is located between the evaporator 300 and the water pan 500, and the first upper heating element 211 and the second upper heating element 212 are disposed near the lower end of the evaporator 300.

In order to prevent the drain opening 510 from being blocked by the defrosted water due to the secondary freezing at the drain opening 510 of the water tray 500, as shown in fig. 4, the middle portions of the first lower heating member 221 and the second lower heating member 222 are disposed near the drain opening 510 along the width direction Y of the evaporator 300. Through the arrangement, the distances between the first lower heating member 221, the second lower heating member 222 and the water outlet 510 are shortened, and the heat near the water outlet 510 is increased, so that the situation that the water outlet 510 is blocked by the defrosting water secondarily frozen at the water outlet 510 of the water collector 500 can be avoided, and the defrosting water is smoothly discharged.

In order to facilitate the fixing of the heating element 2, as shown in fig. 4, fin baffles 330 are respectively arranged at two end portions of the evaporator 300 along the width direction Y, each fin baffle 330 extends downwards to form an extension plate 340, a clamping groove 341 is formed on each extension plate 340, and two ends of the heating element 2 along the width direction Y of the evaporator 300 are respectively clamped with the clamping grooves 341 on the corresponding extension plates 340, so that the heating element 2 and the evaporator 300 are relatively fixed. Compare in the connected mode of screw, add heat-insulating material 2 and can make the dismouting of adding heat-insulating material 2 convenient and fast more through draw-in groove 341 and extension board 340 joint.

The extension plate 340 and the fin baffle 330 may be integrally formed or may be designed separately, and are not limited specifically herein.

In order to make the evaporator 300 heated more uniformly in the thickness direction Z thereof, as shown in fig. 4 and 5, the first upper heating member 211 is parallel to the second upper heating member 212 and is located in the same horizontal plane. Through the arrangement, the distances between the lower ends of the first upper heating element 211 and the second upper heating element 212 and the lower ends of the evaporator 300 can be kept equal, so that the phenomenon that the evaporator 300 is heated unevenly along the thickness direction Z due to unequal distances between the first upper heating element 211 and the second upper heating element 212 and the evaporator 300 can be avoided, and the defrosting effect of the heating element 2 on the evaporator 300 can be improved.

In order to prevent the dry-wet heating temperature from being too high, the power of the defrosting heater 100 in the embodiment of the present invention is 120W (the power of the defrosting heater 100 in the related art is 140W), and after the defrosting heater 100 has performed safety tests such as dry heating, wet heating and abnormal connection of the defrosting heater 100, the experimental results are all qualified.

In the defrosting heater 100 of the embodiment of the present invention, the first upper heating element 211, the second upper heating element 212, the first lower heating element 221, the second lower heating element 222, the first turning portion 23, the second turning portion 24, and the third turning portion 25 may be heating pipes or heating wires, and are not specifically limited herein; the first upper heating member 211, the second upper heating member 212, the first lower heating member 221, the second lower heating member 222, the first turning portion 23, the second turning portion 24, and the third turning portion 25 may be integrally formed, may be designed separately, and are not particularly limited herein;

the connecting heating members 28 may be all heating bent pipes or all heating wires corresponding to the first upper heating member 211, the second upper heating member 212, the first lower heating member 221, and the second lower heating member 222, and are not particularly limited herein; the connecting heating member 28 and the first upper heating member 211 may be integrally formed or may be designed separately, and are not particularly limited herein.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a freezing and refrigerating device, include the evaporimeter storehouse and all set up in evaporimeter in the evaporimeter storehouse with change the frost heater, it includes body and heating member to change the frost heater, the body has the link, the heating member set up in the below of evaporimeter, and with the link is connected, its characterized in that, the heating member is the space heliciform, and the spiral direction of advance of heating member with the thickness direction of evaporimeter is parallel.

2. A refrigerating apparatus as claimed in claim 1, wherein the heating members include an upper heating member and a lower heating member located below the upper heating member;

the upper heating members comprise a first upper heating member and a second upper heating member which are both in a slender shape, the first upper heating member and the second upper heating member both extend along the width direction of the evaporator and are arranged at intervals along the thickness direction of the evaporator;

the lower heating members include a first lower heating member and a second lower heating member each having an elongated shape, the first lower heating member and the second lower heating member each extending in a width direction of the evaporator and being spaced apart in a thickness direction of the evaporator;

the heating member still includes first portion of turning, second portion of turning and third portion of turning, first go up the heating member first portion of turning first heating member down the second portion of turning heating member on the second the third portion of turning heating member down the second heating member connects gradually to be the space heliciform, and first last heating member is kept away from the one end of first portion of turning the second lower heating member is kept away from the one end of third portion of turning all with the link is connected.

3. A refrigerating and freezing apparatus as claimed in claim 2, wherein the heating member further includes a connecting heating member, one end of the first upper heating member remote from the first turning portion is connected to the connecting end through the connecting heating member, and a connecting point of the connecting heating member to the connecting end and a connecting point of the second lower heating member to the connecting end are located at the same height.

4. A refrigerating and freezing apparatus as claimed in claim 3, wherein the connecting heating member includes a first connecting portion and a second connecting portion each having an elongated shape and connected at a predetermined angle, the first connecting portion being connected to the connecting end, and the second connecting portion being connected to the first upper heating member.

5. A refrigerating and freezing apparatus as claimed in claim 3, wherein the first lower heating member is connected to an end of the second turn portion in a thickness direction of the evaporator to extend between the connecting heating member and the second lower heating member and is provided apart from the connecting heating member and the second lower heating member.

6. A cold storage device according to any one of claims 1 to 5, wherein the spacing between the heating element and the rear wall of the evaporator bin is greater than 10 mm.

7. A refrigerated storage unit as claimed in claim 6 wherein the spacing between the heating element and the rear wall of the evaporator bin is 27 mm.

8. A refrigerating and freezing device as claimed in any one of claims 1 to 5, wherein the evaporator has fin baffles at both ends in the width direction, each fin baffle extends downward to form an extension plate, each extension plate is provided with a clamping groove, and the heating element is clamped with the corresponding clamping groove on the extension plate at both ends in the width direction of the evaporator, so that the heating element and the evaporator are fixed relatively.

9. The refrigerating device as claimed in any one of claims 2 to 5, wherein the air circulation system of the refrigerating device further comprises a water pan, the water pan is arranged in the evaporator bin and is positioned at the bottom of the evaporator, the water pan is provided with a water outlet, and the heating element is positioned between the evaporator and the water pan;

the first upper heating element and the second upper heating element are arranged close to the lower end of the evaporator; along the width direction of evaporimeter, the first lower heating member, the second lower heating member's middle part is close to the outlet setting.

10. A refrigerating apparatus as claimed in any one of claims 2 to 5, wherein the first upper heating member is parallel to the second upper heating member and is located in the same horizontal plane.

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