CN2497245Y

CN2497245Y - Hot-gas defrosting refrigerator

Info

Publication number: CN2497245Y
Application number: CN 01255267
Authority: CN
Inventors: 张良国; 冯广平
Original assignee: Guangdong Kelong Electrical Appliances Co Ltd
Current assignee: Jilin Kelon Electric Appliance Company Limited
Priority date: 2001-08-15
Filing date: 2001-08-15
Publication date: 2002-06-26
Anticipated expiration: 2011-08-15

Abstract

The utility model relates to a refrigerator, in particular to a hot gas defrosting refrigerator, wherein the aim of defrost is achieved by reverse flowing of refrigerating fluid. The utility model comprises a compressor, a condensator, a main capillary and an evaporator connected in order in the refrigerating system of the common refrigerator, and also comprises a four-way valve connected with the condensator, the evaporator, a compressor escape pipe and a return-air duct; The capillary comprises a main capillary and an auxiliary capillary between the condenser and the evaporator, and two ends of the auxiliary capillary merge a holding valve flowing from the evaporator to the condenser. In the defrosting state, the four-way valve changes directions, and the refrigerating fluid flows reversely, and the one-way valve assists the capillary short circuit, and the heat evaporates form the inside of the evaporator, and the frost deposit can be automatically and quickly melted and removed from the evaporator.

Description

A kind of hot gas defrosting refrigerator

Technical field

The utility model relates to refrigerator, more particularly, relates to a kind of refrigerator with hot gas defrosting function.

Background technology

In the process of refrigerastion of refrigerator, liquid refrigerant absorbs heat by being installed in evaporimeter in refrigerating chamber or the refrigerating chamber and the air exchange heat in the refrigerator, thereby reach the purpose that reduces refrigerating chamber and freezer temperature, the cold-producing medium and the temperature difference between the air in the refrigerator in the evaporimeter can make evaporator surface amass one deck frost gradually, this long-pending frost will influence the heat exchanger effectiveness of evaporimeter, so need defrost to evaporimeter.

At present, all wind cooling refrigerators all adopt the auxiliary heating technique of electricity to defrost, i.e. electric auxiliary heating device of installing on evaporimeter, when satisfying the defrosting condition, start, frost on the evaporimeter heated it is dissolved, thereby reach the defrosting purpose, this technology has following shortcoming:

1), because the electric heater long period of soaking in frost or frozen water, work under bad environment can cause that electric heater breaks, gets rusty and leaks electricity, so its poor stability;

2), because electric auxiliary heating device in evaporimeter outside, heat energy is from outer past interior transmission during defrosting, the long-acting rate of defrosting time is low, consumption of calorie is big;

3), because after adopting the auxiliary heating technique of electricity to defrost, refrigerator temperature gos up higher, cooling needs more energy again, causes refrigerator power consumption to increase.

4) defrosting control program complexity, the defrosting reliability is lower, whole defrost system cost height.

Summary of the invention

The technical problems to be solved in the utility model is, at the above-mentioned defective of current refrigerator Defrost technology, provides a kind of hot gas defrosting refrigerator, does not need assisted heating device, and is safe and reliable, defrosting efficiency is high and power consumption is little.

The technical solution of the utility model is, adopt the mode of cold-producing medium reverse flow to reach the defrosting purpose, construct a kind of hot gas defrosting refrigerator, the refrigerating circuit of described refrigerator comprises compressor, condenser, capillary and the evaporimeter that connects successively, it is characterized in that, also comprise a cross valve, four ports of described cross valve connect described condenser, evaporimeter and described compressor escape pipe and muffler respectively; Described capillary comprises main capillary and the assisted capillary that is serially connected between described condenser and the described evaporimeter, at described assisted capillary two ends and a check valve that is flowed to described condenser by described evaporimeter arranged.

Refrigerator described in the utility model is when normal refrigeration work, and the flow direction of cold-producing medium is: compressor escape pipe → condenser → main capillary → assisted capillary → evaporimeter → compressor return air pipe, described check valve is not open-minded.When the defrosting duty, the cross valve commutation, the cold-producing medium reverse flow, this moment, the flow direction of cold-producing medium was: compressor escape pipe → evaporimeter → check valve → main capillary → condenser → compressor return air pipe.

As seen, the evaporimeter heat radiation of refrigerator when the defrosting duty, condenser heat absorption.The technical solution of the utility model defrosts and has following major advantage:

1), compares with the auxiliary mode of heating of common electrical, because not from electrically heated electric leakage threat, security is good;

Heat energy is from interior cause of distributing outward, defrosting efficiency height during 2), because of defrosting;

3), because after adopting the hot gas defrosting technology to defrost, refrigerator the temperature inside the box gos up lower, so refrigerator power consumption is less relatively.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Refrigeration system schematic diagram when Fig. 1 is a refrigerator operate as normal of the present utility model;

Fig. 2 is that refrigerator of the present utility model is in the refrigeration system schematic diagram when defrosting duty.

The specific embodiment

As shown in Figure 1, refrigerator of the present utility model comprises compressor 1, condenser 3, main capillary 4 and the evaporimeter 7 that connects successively in the general refrigerator; In order to realize the reverse flow of cold-producing medium, also comprise a four-way electromagnetic reversing valve 2, its four

ports

21,22,23,24 connect compressor escape pipe 11, muffler 12, condenser 3 and evaporimeter 7 respectively; In addition, between main capillary 4 and evaporimeter 7, also be serially connected with an assisted capillary 5; At the two ends of assisted capillary 5 and be connected to a unidirectional electrical magnet valve 6, its direction is to flow to condenser 4 by evaporimeter 7, when cold-producing medium in refrigerating circuit by evaporimeter 7 through capillary flow during to condenser 3, check valve 6 is open-minded, is equivalent to assisted capillary 5 short circuits.

When the normal refrigeration work of refrigerator, the flow direction of cold-producing medium is shown in the direction of arrow among Fig. 1, the cold-producing medium of HTHP is flowed out by compressor escape pipe 11,

port

21,23 through cross valve 2 flows to condenser 3, arrive cross valve 2 through main capillary 4, assisted capillary 5 and evaporimeter 7 again, get back to compressor return air pipe 12 through its port 24,22.Condenser 3 heat radiations of refrigerator in this process, evaporimeter 7 heat absorptions, described check valve 6 is not open-minded.

As shown in Figure 2, when the defrosting duty, cross valve 2 commutations, the cold-producing medium reverse flow, the cold-producing medium of HTHP is flowed out by compressor escape pipe 11,

port

21,24 through cross valve 2 flows to evaporimeter 7, this moment, check valve 6 was open-minded, and assisted capillary 5 is by short circuit, and cold-producing medium flows directly to main capillary 4 by evaporimeter 7 through check valve 6, arrive cross valve 2 through condenser 3 again, get back to compressor return air pipe 12 through its port 23,22.In this process, the cold-producing medium of HTHP flows directly to evaporimeter 7 heat radiations, and heat is distributed to the outside by evaporimeter inside, can automatically and apace the long-pending frost thawing on the evaporimeter be removed.

Assisted capillary 5 is positioned at main capillary 4 left sides in the foregoing description, in fact also it can be moved to main capillary 4 the right, being about to assisted capillary 5 is serially connected between condenser 3 and the main capillary 4, this moment, unidirectional electrical magnet valve 6 moved with needs and assisted capillary 5, was attempted by assisted capillary 5 two ends all the time.In the utility model, master's capillary 4 and assisted capillary 5 participate in refrigerating circuit work together during the refrigerator operate as normal, and its purpose is to reduce the evaporating temperature of evaporimeter 7, and the evaporator of refrigerator temperature can be met design requirement.Refrigerator is 6 work of unidirectional electrical magnet valve in defrost process, it makes assisted capillary 6 short circuits, have only main capillary 4 to participate in loop works, because the shortening in whole loop, the operating power of freezer compressor 1 will increase, and the frost on the evaporator surface is removed at utmost also heat radiation in the short period of time when being convenient to high temperature and high pressure gas by evaporator of refrigerator 7, simultaneously also improved the condenser for refrigerator evaporating temperature greatly, made refrigerator left and right sides condenser surface be difficult for condensation and frosting.

Claims

1, a kind of hot gas defrosting refrigerator, the refrigerating circuit of described refrigerator comprises compressor, condenser, capillary and the evaporimeter that connects successively, it is characterized in that, also comprise a cross valve, four ports of described cross valve connect described condenser, evaporimeter and described compressor escape pipe and muffler respectively; Described capillary comprises main capillary and the assisted capillary that is serially connected between described condenser and the described evaporimeter, at described assisted capillary two ends and be connected to a check valve that is flowed to described condenser by described evaporimeter.

According to the described refrigerator of claim 1, it is characterized in that 2, described assisted capillary is serially connected between described main capillary and the described evaporimeter.

According to the described refrigerator of claim 1, it is characterized in that 3, described assisted capillary is serially connected between described condenser and the described main capillary.