CN214223525U

CN214223525U - Refrigerator defrosting control device

Info

Publication number: CN214223525U
Application number: CN202120147433.5U
Authority: CN
Inventors: 高冬花; 李帅明; 钱存发
Original assignee: Hefei Meiling Union Technology Co Ltd
Current assignee: Hefei Meiling Union Technology Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-09-17
Anticipated expiration: 2031-01-20

Abstract

The utility model discloses a refrigerator defrosting control device relates to refrigerator technical field. The utility model comprises an evaporator and a main control board, wherein the surface of the evaporator is coated with a graphene coating, and the thickness of the graphene coating is 20-30 μm; a first electrode is connected to an inlet of an evaporator pipeline, a second electrode is connected to an outlet of the evaporator pipeline, input ends of the first electrode and the second electrode are electrically connected with the main control board, and output ends of the first electrode and the second electrode are connected with the graphene coating; and pipelines at the inlet and the outlet at two ends of the evaporator are both connected with insulating pipelines. The utility model uses the graphene material with good heat transfer performance as the heat transfer medium and the heating source, because the heating source is in direct contact with the frost layer, the heat transfer is carried out by utilizing the heat conduction, and simultaneously, because the graphene is a good heat conductor, the defrosting speed is high; in addition, because the heating source is directly contacted with the frost layer, indirect heat transfer by an intermediate medium is not needed, the utilization rate of energy is higher, and the overall energy consumption of the refrigerator is greatly reduced.

Description

Refrigerator defrosting control device

Technical Field

The utility model belongs to the technical field of the refrigerator, especially, relate to a refrigerator defrosting controlling means.

Background

The refrigerator is a common household appliance used for storing food and prolonging the freshness date of the food in daily life. In the refrigerating process of the refrigerator, the surface of the evaporator can be frosted due to large temperature difference between the inside and the outside of the surface of the evaporator. The longer the refrigeration time is, the thicker the frost layer is, and if the evaporator is not defrosted frequently, the working efficiency of the evaporator can be seriously influenced, so that the temperature of air in the refrigerator is slowly reduced, the working time of the refrigerator is prolonged, and the energy consumption of the refrigerator is increased.

At present, a defrosting method of a refrigerator generally includes that a steel pipe heater is installed at the bottom of an evaporator of the refrigerator, when the refrigerator runs for a period of time, the heater is switched on, and frost is removed on a frost layer on the surface of the evaporator by utilizing heat radiation and heat convection. The drawback of this defrosting method is that the defrosting is not uniform. The power of the steel tube heater is generally about 150W-200W, and the installation position is generally the bottommost part of the evaporator. Therefore, when the heater is switched on for defrosting, heat is mainly concentrated at the bottom of the evaporator, and the temperature of the upper part of the evaporator rises slowly due to the fact that the upper part of the evaporator is far away from the heating pipe and the fins of the evaporator are shielded, so that the defrosting speed of the upper part of the evaporator is slow, even the phenomenon that defrosting is not clean exists, and the phenomenon is more serious especially for the evaporator with a large longitudinal size.

Graphene is a hexagonal honeycomb lattice two-dimensional carbon nanomaterial consisting of carbon atoms. In recent years, the method has been widely studied and applied to various fields. The coating prepared from the graphene has good electrical conductivity and thermal conductivity, and the characteristic can be applied to the defrosting function of an air-cooled refrigerator.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a refrigerator defrosting control device, through the graphite alkene material that heat transfer performance is fine as heat transfer medium and heating source, because heating source and frost layer direct contact, utilize heat conduction to carry out heat transfer, simultaneously because graphite alkene is the good conductor of heat, therefore the speed of defrosting is fast again; in addition, because the heating source is in direct contact with the frost layer, and indirect heat transfer of an intermediate medium is not needed, the utilization rate of energy is higher, the overall energy consumption of the refrigerator is greatly reduced, and the problems of low speed and high energy consumption in defrosting of a steel pipe heater in the conventional refrigerator are solved.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

the utility model relates to a refrigerator defrosting control device, including evaporimeter and main control board, the spraying has the graphite alkene coating on the evaporimeter surface, and the coating that graphite alkene made has fine electric conductivity and heat conductivity, and this characteristic can be applied to the defrosting function of forced air cooling refrigerator, and graphite alkene coating thickness is 20 mu m ~ 30 mu m; a first electrode is connected to an inlet of an evaporator pipeline, a second electrode is connected to an outlet of the evaporator pipeline, input ends of the first electrode and the second electrode are electrically connected with the main control board, and output ends of the first electrode and the second electrode are connected with the graphene coating and used for electrifying and heating the graphene coating; the pipeline at the entrance and the exit at the evaporator both ends all is connected with insulating pipeline for when graphite alkene coating ohmic heating, the evaporator pipeline is in insulating state with whole refrigerating system pipeline.

Further, the insulating pipeline is a hard rubber pipe.

Furthermore, pipelines at the inlet and the outlet at two ends of the evaporator are connected with the insulating pipeline by lock rings.

Further, the evaporator comprises a coil and fins, and graphene coatings are sprayed on the surfaces of the coil and the fins.

Furthermore, a defrosting sensor is fixed on the surface of the evaporator close to the inlet or the outlet, and the defrosting sensor is electrically connected with the main control board and used for sensing the temperature around the evaporator and judging whether the defrosting program should be exited or not.

The utility model discloses following beneficial effect has:

1. the utility model discloses a fine graphite alkene material of heat transfer performance is as heat transfer medium and the source that generates heat, because generate heat the source with frost layer direct contact, utilizes heat-conduction to carry out heat transfer, simultaneously again because graphite alkene is hot good conductor, consequently it is fast to change the frost.

2. The utility model discloses a refrigerator defrosting control system does not need the intermediate medium to transfer heat indirectly owing to generate heat source and frost layer direct contact, therefore the utilization ratio of the energy is higher, the whole energy consumption greatly reduced of refrigerator.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

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

Fig. 1 is a schematic structural view of a defrosting control device of a refrigerator according to the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-evaporator, 2-first electrode, 3-second electrode, 4-main control board, 5-insulating pipeline, 6-defrosting sensor and 7-locking ring.

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 of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "inlet", "upper", "lower", "surface", "middle", "outlet", and the like, indicate an orientation or positional relationship, merely for convenience of description and simplicity of description, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Please refer to fig. 1, the utility model relates to a refrigerator defrosting control device, including evaporimeter 1 and main control board 4, 1 surface spraying of evaporimeter has the graphite alkene coating, and the coating that graphite alkene made has fine electric conductivity and heat conductivity, and this characteristic can be applied to the defrosting function of forced air cooling refrigerator, and wherein evaporimeter 1 includes coil pipe and fin, and the coil pipe all sprays the graphite alkene coating with the fin surface, and graphite alkene coating thickness is 20 mu m ~ 30 mu m.

A first electrode 2 is connected to the inlet of a pipeline of the evaporator 1, a second electrode 3 is connected to the outlet of the pipeline of the evaporator 1, the input ends of the first electrode 2 and the second electrode 3 are electrically connected with a main control board 4, and the output ends of the first electrode 2 and the second electrode 3 are connected with the graphene coating for electrifying and heating the graphene coating;

the entrance and the exit at 1 both ends of evaporimeter do not spray the graphite alkene coating, and the entrance at 1 both ends of evaporimeter and the pipeline in exit all are connected with insulating pipeline 5, and insulating pipeline 5's the other end and other tube coupling of whole refrigerating system for during graphite alkene coating ohmic heating, when making graphite alkene coating ohmic heating, 1 pipeline of evaporimeter and whole refrigerating system pipeline are in insulating state.

Preferably, the insulated pipeline 5 is a hard rubber pipe, and pipelines at the inlet and the outlet of the two ends of the evaporator 1 are connected with the insulated pipeline 5 by using locking rings 8.

Preferably, a defrosting sensor 6 is fixed on the surface of the evaporator 1 near the inlet or the outlet, and the defrosting sensor 6 is electrically connected to the main control board 4 for sensing the temperature around the evaporator 1 and determining whether the defrosting process should be exited.

One specific application of this embodiment is: when the refrigerator defrosts, the first electrode 2 and the second electrode 3 which are connected with the graphene coating are electrified through the main control board 4, and at the moment, the pipeline of the evaporator 1 and the pipeline of the whole refrigeration system are in an insulation state. After the power is switched on, the electric energy is converted into heat energy by the graphene coating, and the surface temperature of the graphene coating can rise. Because the graphene coating is in direct contact with the frost layer, the defrosting efficiency is high, and the defrosting time is greatly shortened. As the frost layer attached to the surface of the evaporator 1 is continuously melted, the temperature of the air around the evaporator 1 is gradually increased, and when the frost sensor 6 senses that the temperature is increased to 8 ℃, the frost layer is considered to be completely melted, at this time, the heating is stopped, and the refrigerator enters a cooling state.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a refrigerator defrosting controlling means, includes evaporimeter (1) and main control board (4), its characterized in that: the surface of the evaporator (1) is sprayed with a graphene coating, and the thickness of the graphene coating is 20-30 micrometers;

a first electrode (2) is connected to the inlet of a pipeline of the evaporator (1), a second electrode (3) is connected to the outlet of the pipeline of the evaporator (1), the input ends of the first electrode (2) and the second electrode (3) are electrically connected with a main control board (4), and the output ends of the first electrode (2) and the second electrode (3) are connected with the graphene coating and used for carrying out electric heating on the graphene coating;

the pipeline at the inlet and the outlet at the two ends of the evaporator (1) is connected with an insulating pipeline (5), so that the pipeline of the evaporator (1) and the pipeline of the whole refrigeration system are in an insulating state when the graphene coating is subjected to power-on heating.

2. The defrosting control device of a refrigerator according to claim 1, characterized in that the insulating pipeline (5) is a hard rubber tube.

3. The defrosting control device of a refrigerator according to claim 1 or 2, characterized in that the pipelines at the inlet and outlet of the two ends of the evaporator (1) are connected with the insulating pipeline (5) by a lock ring (8).

4. The defrosting control device of a refrigerator according to claim 3, characterized in that the evaporator (1) comprises a coil and a fin, and the surfaces of the coil and the fin are both sprayed with graphene coatings.

5. The defrosting control device of a refrigerator according to claim 1 or 4, wherein a defrosting sensor (6) is fixed on the surface of the evaporator (1) near the inlet or the outlet, and the defrosting sensor (6) is electrically connected with the main control panel (4) for sensing the temperature around the evaporator (1) and determining whether the defrosting process should be exited.