CN109708340B

CN109708340B - Evaporator using method

Info

Publication number: CN109708340B
Application number: CN201811155209.XA
Authority: CN
Inventors: 李孟成; 朱小兵
Original assignee: HEFEI HAIER REFRIGERATOR CO Ltd; Haier Smart Home Co Ltd
Current assignee: HEFEI HAIER REFRIGERATOR Co.,Ltd.; Haier Smart Home Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2021-01-05
Anticipated expiration: 2038-09-30
Also published as: CN109708340A

Abstract

The invention provides an evaporator and a use method thereof, wherein the evaporator comprises: the device comprises an evaporation tube, a fin group and a driving mechanism; the evaporation tube comprises a plurality of straight tubes arranged side by side; the fin group comprises a first fin group and a second fin group, the first fin group comprises a plurality of first fins arranged in parallel, the second fin group comprises a plurality of second fins arranged in parallel, and the first fins and the second fins are arranged at intervals; the driving mechanism drives the first fin group or the second fin group to move along the straight pipe so as to adjust the spacing between the first fin and the adjacent second fin; compared with the prior art, the evaporator has the advantages that the fin spacing is adjustable, so that the fin spacing can be adjusted according to different working conditions, the frosting or icing speed of the evaporator is further reduced, the wind resistance of circulating wind passing through the fins is reduced, and the heat exchange efficiency of the evaporator is improved.

Description

Evaporator using method

Technical Field

The invention relates to a using method of an evaporator.

Background

In an air duct circulating system of an air-cooled refrigerator, circulating air circulates from bottom to top from the bottom of an evaporator and exchanges heat with the evaporator. When high temperature and high humidity air passes through the evaporator, moisture in the high temperature and high humidity air can be condensed on the surface of the evaporator to form a frost layer or an ice layer. Because the circulating air passes through the evaporator from bottom to top, the distribution characteristic of a frost layer or an ice layer on the evaporator is also from bottom to top, and the thickness of the frost layer or the ice layer is gradually reduced from bottom to top. The speed that current fixed evaporimeter of fin interval is close to air outlet department frost or ice is comparatively fast, the thickness on frost layer or ice layer is great to windage when making the circulated air pass through the fin increases, and then influences the heat exchange efficiency of evaporimeter.

In view of the above problems, there is a need to provide a new method for using an evaporator to solve the above problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention solves the technical problem of providing the using method of the evaporator, the fin spacing of the evaporator is adjustable, so that the fin spacing can be adjusted according to different working conditions, the frosting or icing speed of the evaporator is further reduced, the wind resistance when circulating wind passes through the fins is reduced, and the heat exchange efficiency of the evaporator is further improved.

In order to solve the technical problem, the technical scheme of the invention is realized as follows:

the use method of the evaporator is used for a refrigerator, the refrigerator comprises a plurality of compartments, and the evaporator comprises an evaporation tube, a fin group matched with the evaporation tube and a driving mechanism matched with the fin group; the evaporation tube comprises a plurality of straight tubes arranged side by side; the fin group comprises a first fin group and a second fin group, the first fin group comprises a plurality of first fins arranged in parallel, the second fin group comprises a plurality of second fins arranged in parallel, and the first fins and the second fins are arranged at intervals; the driving mechanism drives the first fin group or the second fin group to move along the straight pipe so as to adjust the spacing between the first fin and the adjacent second fin; when the temperature in the chamber is in a first interval, the second fin is positioned at the middle position between two adjacent first fins; when the temperature in the compartment is in a second interval, the driving mechanism drives the first fin group or the second fin group to move, so that the second fin deviates from the middle position.

Furthermore, the fin group also comprises a third fin positioned on one side of the second fin group, and the third fin group comprises a plurality of third fins arranged in parallel; the third fins and the first fins are arranged at intervals; when the temperature in the chamber is in a first interval, the driving mechanism drives the third fin group to move, so that the third fin deviates from the middle position between two adjacent first fins.

Further, when the temperature in the chamber is in a second interval, the projections of the second fin and the third fin on the straight pipe are not overlapped.

Further, when the temperature in the chamber approaches a preset temperature, the driving mechanism drives the second fin and the third fin to deviate from the middle position, and the projections of the second fin and the third fin on the straight pipe at least partially coincide.

Further, the driving mechanism is provided with a heating device; when the refrigerator is in a defrosting mode, the heating device works and transfers heat to the fin group.

Further, the refrigerator is provided with a food recognition device; when the food recognition device recognizes that the meat product is stored in the chamber and the temperature of the meat product is in a third interval, the driving mechanism drives the second fin to deviate from the middle position.

Further, the refrigerator is provided with a food recognition device; when the food identification device identifies that meat products are stored in the chamber and the temperature of the meat products is in a third interval, the driving mechanism drives the second fin and the third fin to deviate from the middle position, and at least partial projections of the second fin and the third fin on the straight pipe are overlapped.

Further, the sum of the lengths of the second fin and the third fin is not greater than the length of the first fin.

Further, the straight pipe penetrates through at least one of the first fin group and the second fin group.

Further, the first fin group is fixed, and the second fin moves along the straight pipe under the driving of the driving mechanism; the length of the first fin is not less than the length of the second fin.

Further, the driving mechanism comprises a threaded rod and a motor for driving the threaded rod to rotate, and the first fin or the second fin is mounted on the threaded rod; when the driving mechanism works, the first fin or the second fin moves along the threaded rod.

Further, a heating device is arranged in the threaded rod.

The invention has the beneficial effects that: compared with the prior art, the evaporator has the advantages that the fin spacing is adjustable, so that the fin spacing can be adjusted according to different working conditions, the frosting or icing speed of the evaporator is further reduced, the wind resistance of circulating wind passing through the fins is reduced, and the heat exchange efficiency of the evaporator is improved.

Drawings

Fig. 1 is a schematic view showing the structure of an evaporator according to the present invention.

Fig. 2 is a schematic structural view showing another embodiment of the evaporator of the present invention.

Fig. 3 is a schematic view of an operating state of the evaporator shown in fig. 2.

Fig. 4 is a schematic view of another operating state of the evaporator shown in fig. 2.

Fig. 5 is a schematic view of another operating state of the evaporator shown in fig. 2.

Fig. 6 is a schematic structural view of the driving mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the drawings are exemplary only, and the invention is not limited to these embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, an evaporator 100 of the present invention is used in a refrigerator having a plurality of storage compartments. The evaporator 100 includes an evaporating tube 10, a fin set 20 coupled to the evaporating tube 10, and a driving mechanism 30 coupled to the fin set 20.

Referring to fig. 1, the evaporation tube 10 includes a plurality of straight tubes 11 arranged in parallel and a connection tube 12 connecting the adjacent straight tubes 11. The fin group 20 includes a first fin group 21 and a second fin group 22. The first fin group 21 includes a plurality of first fins 211 arranged in parallel, the second fin group 22 includes a plurality of second fins 221 arranged in parallel, and the first fins 211 and the second fins 221 are arranged at intervals. The driving mechanism 30 drives the first fin group 21 or the second fin group 22 to move along the straight pipe 11, thereby adjusting the pitch between the first fin 211 and the adjacent second fin 221. In the present embodiment, the first fin group 21 is fixed, and the second fin group 22 moves along the straight pipe 11 by the driving mechanism 30. The length of the first fin 21 is not less than the length of the second fin 22. The driving mechanism 30 includes a threaded rod 31 and a motor 32 for driving the threaded rod 31 to rotate, and the first fin 211 or the second fin 221 is mounted on the threaded rod 31. When the motor 32 is operated, the first fin 211 or the second fin 221 moves along the straight tube 11 by the action of the threaded rod 31. A heating device 311 is also arranged in the threaded rod 31. When the frost layer or the ice layer on the fin group 20 is thick, the heating device 311 works and transfers heat to the fin group 20 through the threaded rod 31, so that the fin group 20 can defrost or ice, and the heat exchange efficiency of the evaporator 100 is effectively prevented from being affected by the excessively thick frost layer or the ice layer on the fin group 20. In the present embodiment, the heating device 311 is a heating wire. Since the heating device 311 directly heats the second fin 22 disposed on the threaded rod 31, the second fin 22 has a high heat utilization rate, so that the defrosting cycle is short and the power consumption is low.

In other embodiments of the present invention, the driving mechanism may be provided independently of the evaporator, for example, a tool having no direct connection and engagement relationship with the first and

second fins

211, 221, but may be manually driven to move the first and

second fins

211, 221 to change the distance therebetween.

Fig. 2 shows an evaporator 200 according to another embodiment of the present invention. The evaporator 200 is generally similar in structure to the evaporator 100, except that: the evaporator 200 is also provided with a third fin group 23, and the third fin group 23 is located on one side of the second fin group 22. The third fin group 23 includes a plurality of third fins 231 arranged in parallel, and the third fins 231 and the first fins 211 are arranged at intervals. The sum of the lengths of the second fin 221 and the third fin 231 is not greater than the length of the first fin 211. The driving mechanism 30 includes a first driving mechanism 301 and a second driving mechanism 302. The first drive mechanism 31 drives the second fin group 22 to move along the straight pipe 11, and the second drive mechanism 302 drives the third fin group 23 to move along the straight pipe 11. The first driving mechanism 301 and the second driving mechanism 302 both include a threaded rod 31 and a motor 32 for driving the threaded rod 31 to rotate, and a heating device 311 is disposed in the threaded rod 31. When the frost layer or ice layer on the fin group 20 is not very thick, the heating device 311 in the second driving mechanism 302 operates, so that defrosting can be realized while power consumption is reduced; when the frost layer or ice layer on the fin group 20 is thick, the heating devices 311 in the first and

second driving mechanisms

301 and 302 operate simultaneously to quickly defrost or ice.

Fig. 6 shows a driving mechanism 30 ' according to another embodiment of the present invention, which includes a motor (not shown), a driving wheel 31 ' mounted on the motor, a slider 33 ', and a connecting rod 32 ' connecting the driving wheel 31 ' and the slider 33 ', wherein the second fin group 22 and the third fin group 23 are mounted on the slider 33 '. In fact, there are many embodiments of the driving mechanism that can achieve the aforementioned functions, and therefore, the detailed description thereof is not necessary. The equivalent variation of the present invention is applicable to any drive mechanism that can move the second fin group 22 and the third fin group 23 along the straight pipe 11.

The invention also provides a using method of the evaporator 200, which comprises the following steps:

s1: when the temperature of the chamber is in the first interval, the second fin 221 is located at the middle position of two adjacent first fins 211, as shown in fig. 2;

s2: when the compartment temperature is in the second zone, the driving mechanism 30 drives the first fin group 21 or the second fin group 22 to move so that the second fin 221 is offset from the intermediate position, as shown in fig. 4.

Wherein the first interval is the interval [ -10 ℃, 25 ℃ or a subset of this interval, and the second interval is the interval [0 ℃, 40 ℃ ] or a subset of this interval. Since the distance between the second fin 221 and the adjacent first fin 211 is increased, it is beneficial for the circulating wind to blow upward from the bottom of the evaporator. The effect is best when the second fin 221 abuts against the adjacent first fin 211.

Further, the method also includes step S3: when the temperature of the chamber is in the first interval, the driving mechanism 30 drives the third fin 231 to move, so that the third fin 231 deviates from the middle position between the adjacent two first fins 211, as shown in fig. 3.

Wherein, when the third fin 231 is abutted with the adjacent first fin 211, the effect is best.

Further, the method also includes step S4: when the compartment temperature is in the second zone, the projections of the second fin 221 and the third fin 231 on the straight tube 11 are not overlapped, as shown in fig. 4. At this time, the second fin group 22 and the third fin group 23 form a staggered narrow fin spacing structure, the fin heat exchange area is increased, the heat transfer factor of the staggered evaporator is high, and the heat exchange efficiency of the evaporator can be effectively improved.

Further, the method also includes step S5: when the compartment temperature approaches a preset temperature (the preset temperature is a storage temperature set for the compartment by a user), the driving mechanism 30 drives the second fin 221 and the third fin 231 to deviate from the middle position, and the projections of the second fin 221 and the third fin 231 on the straight pipe 11 at least partially coincide with each other, as shown in fig. 5.

In the process of refrigerating the refrigerator, the temperature of the refrigerator compartment is reduced at a high speed in the initial stage. When the temperature is close to the preset temperature, the temperature drop speed is slow, water vapor in the chamber begins to frost or freeze on the evaporator, and at the moment, the second fins 221 and the third fins 231 deflect in the same direction, so that the distance between the fins is increased, and the frost or freezing speed on the evaporator can be effectively reduced.

Further, the method also includes step S6: the refrigerator is provided with a food identification device; when the food recognition device recognizes that the meat item is stored in the compartment and the temperature of the meat item is in the third interval, the driving mechanism 30 drives the second fin 221 to deviate from the intermediate position.

Wherein the third interval is the interval [0 ℃, 40 ℃) or a subset of the interval.

Further, the method also includes step S7: when the food recognition device recognizes that a meat product is stored in the compartment and the temperature of the meat product is in a third interval, the driving mechanism 30 drives the second fin 221 and the third fin 231 to deviate from the intermediate positions, and the projections of the second fin 221 and the third fin 231 on the straight tube 11 at least partially overlap.

Because meat products's temperature is high, humidity is big, and need rapid cooling, consequently adjust the evaporimeter for wide interval fin structure, can effectively reduce the windage, improve heat exchange efficiency, can also reduce the speed of frosting or freezing simultaneously.

Compared with the prior art, the fin spacing of the

evaporators

100 and 200 is adjustable, so that the fin spacing can be adjusted according to different working conditions, the frosting or icing speed of the evaporators is further reduced, the wind resistance of circulating wind passing through the fins is reduced, and the heat exchange efficiency of the evaporators is improved.

It is specifically noted that equivalent variations of the present invention taught by those skilled in the art are within the scope of the present invention as claimed.

Claims

1. An evaporator using method, which is used for a refrigerator, the refrigerator comprises a plurality of compartments, and the evaporator is characterized in that: the evaporator comprises an evaporation tube, a fin group matched with the evaporation tube and a driving mechanism matched with the fin group; the evaporation tube comprises a plurality of straight tubes arranged side by side; the fin group comprises a first fin group and a second fin group, the first fin group comprises a plurality of first fins arranged in parallel, the second fin group comprises a plurality of second fins arranged in parallel, and the first fins and the second fins are arranged at intervals; the driving mechanism drives the first fin group or the second fin group to move along the straight pipe so as to adjust the spacing between the first fin and the adjacent second fin;

when the temperature in the chamber is in a first interval, the second fin is positioned at the middle position between two adjacent first fins;

when the temperature in the compartment is in a second interval, the driving mechanism drives the first fin group or the second fin group to move, so that the second fin deviates from the middle position.

2. The method of using an evaporator of claim 1, wherein:

the fin group further comprises a third fin positioned on one side of the second fin group, and the third fin group comprises a plurality of third fins arranged in parallel; the third fins and the first fins are arranged at intervals;

when the temperature in the chamber is in a first interval, the driving mechanism drives the third fin group to move, so that the third fin deviates from the middle position between two adjacent first fins.

3. The method of using an evaporator of claim 2, wherein: when the temperature in the chamber is in a second interval, the projections of the second fin and the third fin on the straight pipe are not overlapped.

4. A method of using an evaporator as claimed in claim 2 or 3 wherein: when the temperature of the chamber is close to the preset temperature, the driving mechanism drives the second fin and the third fin to deviate from the middle position, and the projections of the second fin and the third fin on the straight pipe are at least partially overlapped.

5. A method of using an evaporator as claimed in claim 1 or 2 or 3 wherein: the driving mechanism is provided with a heating device; when the refrigerator is in a defrosting mode, the heating device works and transfers heat to the fin group.

6. The method of using an evaporator of claim 1, wherein: the refrigerator is provided with a food identification device; when the food recognition device recognizes that the meat product is stored in the chamber and the temperature of the meat product is in a third interval, the driving mechanism drives the second fin to deviate from the middle position.

7. A method of using an evaporator as claimed in claim 2 or 3 wherein: the refrigerator is provided with a food identification device; when the food identification device identifies that meat products are stored in the chamber and the temperature of the meat products is in a third interval, the driving mechanism drives the second fin and the third fin to deviate from the middle position, and at least partial projections of the second fin and the third fin on the straight pipe are overlapped.

8. The method of using an evaporator of claim 2, wherein: the sum of the lengths of the second fin and the third fin is not more than the length of the first fin.

9. The method of using an evaporator of claim 1, wherein: the straight pipe at least penetrates through one of the first fin group and the second fin group.

10. The method of using an evaporator of claim 9, wherein: the first fin group is fixed, and the second fin moves along the straight pipe under the driving of the driving mechanism; the length of the first fin is not less than the length of the second fin.

11. The method of using an evaporator of claim 1, wherein: the driving mechanism comprises a threaded rod and a motor for driving the threaded rod to rotate, and the first fin or the second fin is arranged on the threaded rod; when the driving mechanism works, the first fin or the second fin moves along the threaded rod.

12. The method of using an evaporator of claim 11, wherein: and a heating device is arranged in the threaded rod.