CN212157755U

CN212157755U - Defrosting device of air-cooled frostless refrigerator

Info

Publication number: CN212157755U
Application number: CN202020149928.7U
Authority: CN
Inventors: 任立人
Original assignee: Jiangsu Yuanlong Appliances Co ltd
Current assignee: Jiangsu Yuanlong Appliances Co ltd
Priority date: 2020-01-24
Filing date: 2020-01-24
Publication date: 2020-12-15
Anticipated expiration: 2030-01-24

Abstract

The utility model relates to a frost device that changes of air-cooled frostless refrigerator, including consecutive evaporimeter, compressor and the condenser pipe that constitutes circulation circuit, it has the capillary to establish ties between evaporimeter and the condenser pipe, be connected with the short circuit pipeline between compressor and the evaporimeter, install the refrigeration solenoid valve on the short circuit pipeline, the refrigeration solenoid valve can be towards the one-way normally closed valve that the evaporimeter direction switched on for the compressor, install the frost sensor that changes on the evaporimeter. The utility model discloses cancel traditional steel pipe electrical heating, reduced the production and the manufacturing cost of potential safety hazard, great increase the efficiency of changing the frost, reduce the energy consumption of changing the frost.

Description

Defrosting device of air-cooled frostless refrigerator

Technical Field

The utility model belongs to the technical field of the air-cooled refrigerator defrosting, concretely relates to frost removing device of air-cooled frostless refrigerator.

Background

With the improvement of living standard and the development of refrigerator technology, air-cooled frostless refrigerators occupy most of the refrigerator market, wherein frostless refrigerators basically adopt other heating methods such as steel pipe electric heating or aluminum pipe electric heating to heat a refrigerator evaporator, so that the aim of removing residual ice and frost on the surface of the evaporator is achieved, but the electric heating belongs to an external heat source compared with a full-frost evaporator, the heat transfer method is mainly radiation heat exchange, the heat exchange efficiency is limited, in addition, the electric heating of the type needs to be independently connected with a 220V power supply and is connected with a protector in series to ensure the electric performance safety, particularly, most of the steel pipe electric heating in use at present has the working surface temperature of 300 ℃ which is far higher than the melting point of the current refrigerator liner material, so that great potential safety hazard exists, and if the potential hazard is eliminated, a great amount of cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a frost removing device of an air-cooled frostless refrigerator, which solves the problem of high cost of frost removing.

The utility model discloses a defrosting device of air-cooled frostless refrigerator is realized like this:

the utility model provides a frost device of air-cooled frostless refrigerator, includes consecutive evaporimeter, compressor and the condenser pipe that constitutes circulation circuit, it has the capillary to establish ties between evaporimeter and the condenser pipe, be connected with the short circuit pipeline between compressor and the evaporimeter, install the refrigeration solenoid valve on the short circuit pipeline, the refrigeration solenoid valve is the one-way normally closed valve that the compressor can switch on towards the evaporimeter direction, install the sensor that defrosts on the evaporimeter.

Furthermore, the inner diameter of the short-circuit pipeline is more than five times of the inner diameter of the capillary tube.

Furthermore, the short-circuit pipeline is a copper pipe.

After the technical scheme is adopted, the utility model discloses the beneficial effect who has does:

(1) the utility model cancels the traditional steel pipe electric heating, the evaporator is not required to be connected with a 220V strong current wire harness, the potential safety hazard possibly generated by the contact of the wire harness and metal is avoided, and the production cost is reduced;

(2) the utility model discloses directly flow into the evaporimeter with compressor exhaust high temperature gas, heat through aluminum pipe and fin and heat the defrosting for the evaporimeter surface, great increase the efficiency of defrosting, reduce the energy consumption of defrosting, and can not cause the damage of freezer food because of the rising of temperature.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a structural view of a defrosting apparatus of an air-cooled frostless refrigerator according to a preferred embodiment of the present invention;

in the figure: the system comprises an evaporator 1, a compressor 2, a condenser pipe 3, a capillary 4, a short-circuit pipeline 5, a refrigeration electromagnetic valve 6 and a defrosting sensor 7.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

As shown in fig. 1, a defrosting device of an air-cooled frostless refrigerator comprises an evaporator 1, a compressor 2 and a condenser pipe 3 which are connected in sequence to form a circulation loop, wherein a capillary tube 4 is connected in series between the evaporator 1 and the condenser pipe 3, a short-circuit pipeline 5 is connected between the compressor 2 and the evaporator 1, a refrigeration electromagnetic valve 6 is installed on the short-circuit pipeline 5, the refrigeration electromagnetic valve 6 is a one-way normally-closed valve which can be conducted towards the direction of the evaporator 1 by the compressor 2, and a defrosting sensor 7 is installed on the evaporator 1.

Specifically, the defrosting sensor 7 is installed at a place where the temperature of the evaporator 1 rises slowest, and if the temperature at the place rises to the range of complete defrosting, it indicates that complete defrosting is also achieved at the rest positions of the evaporator 1. The place where the temperature of the evaporator rises slowest is the lowest part of the evaporator.

The temperature sensor can be selected from DKST1329GW manufactured by DeKun Sensors, Suzhou

When the temperature detected by the defrosting sensor is generally between-27 and-23 in the normal refrigeration process of the refrigerator, the evaporator is in the surface frosting process, and when the temperature detected by the defrosting sensor reaches 2 ℃, the defrosting sensor indicates that the surface of the evaporator is frosted.

In order to ensure the flow resistance difference of the short-circuit pipeline 5 and the pipeline where the capillary 4 is located, so as to ensure the smooth flow of the short-circuit pipeline 5 and improve the defrosting efficiency, the inner diameter of the short-circuit pipeline 5 is more than five times that of the capillary 4.

The larger the difference between the inner diameter of the short-circuit pipeline 5 and the inner diameter of the capillary 4 is, the higher the defrosting efficiency is.

The short-circuit pipeline 5 is a copper pipe.

The flowing performance of the liquid in the copper pipe is better than that of other pipes, the resistance is small, and the water flow is not easy to be blocked or even blocked; the copper pipe is smaller than the inner diameter of other pipes at the same flow, the pipe wall is thin, the water flow pressure is reduced to the minimum, and therefore the copper pipe is selected as the short-circuit pipeline 5, materials are saved, and a large amount of energy consumption can be saved.

When normally refrigerating, the refrigeration electromagnetic valve 6 is in a normally closed state, refrigerant flows out of the compressor 2, is radiated by the condenser pipe 3, is throttled and depressurized by the capillary tube 4, is evaporated by the evaporator 1, and then reaches the compressor 2 to form a normal refrigeration cycle to fulfill the refrigeration requirement.

When defrosting is needed, the compressor 1 runs at a high speed, the refrigeration electromagnetic valve 6 is electrified and opened, the capillary tube 4 has a small inner diameter and large resistance to the refrigerant, most of the high-temperature and high-pressure refrigerant discharged from the compressor 1 directly flows into the evaporator 2 through the short-circuit pipeline 4 where the refrigeration electromagnetic valve 6 is located through the fluid characteristic, and the high-temperature refrigerant heats the frost on the surface of the evaporator 2 in the evaporator 2 through heat conduction, so that the defrosting purpose is achieved.

During defrosting, the high-temperature gas generated by the operation of the compressor 2 is discharged, the maximum temperature is 130 ℃, and when defrosting is finished, the temperature of other parts of the whole freezing chamber is lower than-15 ℃, so that the temperature of food in the freezing chamber is not influenced.

The utility model discloses a defrosting of evaporimeter can be realized to short circuit pipeline 4 that has one-way refrigeration solenoid valve 6, simple structure, it is with low costs.

Example 1

Before the refrigerator is used, a defrosting period is required to be set, wherein the range of the defrosting period is generally 16-32 hours, in the embodiment, the defrosting period can be set at 16 hours, a short-circuit pipeline 5 of the embodiment selects a copper pipe with the inner diameter of 4.5mm, a refrigeration electromagnetic valve 6 is installed on the short-circuit pipeline 5, the inner diameter of a capillary 4 is 0.6mm, a defrosting sensor 7 is installed on an evaporator 1 and is located at the lowest part of the evaporator 1, when the last defrosting time reaches 16 hours, the refrigeration electromagnetic valve 6 is powered on and conducted, defrosting is started on the surface of the evaporator 1, the defrosting sensor 7 detects the temperature change of the evaporator 1 in real time, when the temperature of the position where the defrosting sensor 7 is located rises to 2 ℃, the defrosting is indicated to be finished, the refrigeration electromagnetic valve 6 is powered off and closed, and defrosting is finished. The starting time of the next defrosting action is 16 hours away from the starting time of the current defrosting action, so that the periodical defrosting operation is realized.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A defrosting device of an air-cooled frostless refrigerator is characterized by comprising an evaporator (1), a compressor (2) and a condenser pipe (3) which are sequentially connected to form a circulation loop, wherein a capillary tube (4) is connected in series between the evaporator (1) and the condenser pipe (3), a short-circuit pipeline (5) is connected between the compressor (2) and the evaporator (1), a refrigeration electromagnetic valve (6) is installed on the short-circuit pipeline (5), the refrigeration electromagnetic valve (6) is a one-way normally-closed valve which can be conducted towards the direction of the evaporator (1) by the compressor (2), and a defrosting sensor (7) is installed on the evaporator (1);

the inner diameter of the short-circuit pipeline (5) is more than five times of the inner diameter of the capillary tube (4).

2. The defrosting device of an air-cooled frostless refrigerator according to claim 1, wherein the short-circuit pipeline (5) is a copper pipe.