CN2543004Y

CN2543004Y - Direct-cooling refrigerator

Info

Publication number: CN2543004Y
Application number: CN 02227115
Authority: CN
Inventors: 张良国; 程德彬
Original assignee: Guangdong Kelong Electrical Appliances Co Ltd
Current assignee: Jilin Kelon Electric Appliance Company Limited
Priority date: 2002-04-23
Filing date: 2002-04-23
Publication date: 2003-04-02
Anticipated expiration: 2012-04-23

Abstract

A direct cooling refrigerator comprises a compressor, a condenser, a capillary, a F evaporator, a R evaporator, the first switch device capable of making an exit of the compressor communicated with an inlet of the condenser when refrigeration is conducted while the exit of the compressor is broke over with an inlet of the F evaporator when defrosting is conducted, an assisting capillary tube connected in series between the F evaporator and the R evaporator, and the second switch device crossed over two ends of the capillary tube used for breaking over when refrigeration is conducted and opened when defrosting is conducted. The first switch device can be a trifarious electromagnetic valve or a bidirectional electromagnetic valve, while the second switch device can be the bidirectional electromagnetic valve or an electronic expansion valve. The direct cooling refrigerator has the advantages that defrosting time of a refrigerating room is short, about 20 minutes are needed for each defrosting process; a cold room can be used normally when defrosting is conducted in the refrigerating room; the R evaporator can be supplied with a coolant by the second switch device at the outlet end of the F evaporator and normal refrigeration can be conducted by the second switch device when defrosting process is conducted in the refrigerating room; a direct cooling refrigerator with a full automatic or semi-automatic refrigerating room defrosting function can be made by the control of a computer.

Description

Direct cooling refrigerator

Technical field

The utility model relates to refrigerator, is specifically related to a kind of the realization automatically or the direct cooling refrigerator of semiautomatic defrosting.

Background technology

In the prior art, the defrost of all direct cooling refrigerators is carried out usually in two steps, the refrigerating chamber defrost is to utilize gap that refrigerator shuts down or the time that artificially prolongs this gap to defrost, the mode that the refrigerating chamber defrost then adopts complete machine to have a power failure is carried out, open the door of freezer compartment of refrigerator, allow its temperature go up to defrost naturally, its shortcoming is: 1) the refrigerating chamber defrost is chronic, need generally speaking about 12 hours, use refrigerator thereby influence the user; 2) during the refrigerating chamber defrost, the temperature of refrigerating chamber also goes back up to the environment temperature that refrigerator uses, again after the start, compressor needs long-play just can enter normal operating conditions, increased energy consumption, and above-mentioned defrost process all needs manually to operate control, can't realize automatic defrosting.

The utility model content

The technical problems to be solved in the utility model is, a kind of direct cooling refrigerator is provided, and when the refrigerating chamber of refrigerator needs defrost, but automatic defrosting has defrost time weak point, defrost efficient height and energy-conservation characteristics.

The technical scheme that the utility model addresses the above problem is, construct a kind of direct cooling refrigerator, comprise the compressor that constitutes the refrigerant loop, condenser, capillary, the F evaporimeter, the R evaporimeter, when also being included in refrigeration described compressor outlet is communicated with described condenser inlet, and when defrost, make first switching device of described compressor outlet and the conducting of described F evaporator inlet, also comprise being serially connected in the assisted capillary between described F evaporimeter and the described R evaporator outlet and being connected across described assisted capillary two ends being used for conducting when refrigeration, the second switch device that defrost disconnects.

In the direct cooling refrigerator that provides according to the utility model, described first switching device is a three-way solenoid valve, the entrance point of described three-way valve is connected with the port of export of described compressor, a port of export of described three-way valve is connected with the entrance point of described condenser, and its another port of export is connected with described F evaporator end.

In the direct cooling refrigerator that provides according to the utility model, described second switch device is a bidirectional electromagnetic valve.

In the direct cooling refrigerator that provides according to the utility model, described second switch device is an electric expansion valve.

In the direct cooling refrigerator that provides according to the utility model, described first switching device comprises bidirectional electromagnetic valve, and an interface of described bidirectional electromagnetic valve is connected with the refrigerant exit end of described compressor, and its another interface is connected with the entrance point of described F evaporimeter.

In the direct cooling refrigerator that provides according to the utility model, between described condenser and described capillary, filter is arranged.

In the direct cooling refrigerator that provides according to the utility model, between described evaporimeter and described compressor, be connected with reservoir.

Implement the direct cooling refrigerator that the utility model provides, when the needs defrost, the refrigerant agent Bypass Control first switching device conducting when making defrost by the control circuit in the refrigerator, the high temperature refrigerant of compressor output directly can be delivered to F evaporimeter (freezer evaporator), the F evaporimeter absorbs the heat defrost, the major advantage of this direct-cooled frostless frost has: freezer compartment of refrigerator defrost time short (but high temperature refrigerant quickly defrosting), each about 20 minutes of defrost time; Refrigerating chamber can normally use during the freezer compartment of refrigerator defrost, be connected the defrost branch road by the control of second switch device of F evaporator outlet end, thereby when refrigeration, can be provided refrigerant to the R evaporimeter, when the refrigerating chamber defrost by short circuit, the effect of defrost branch road also can normally be freezed; Utilize computer control can make direct cooling refrigerator with full-automatic or automanual refrigerating chamber defrost function.

Description of drawings

Fig. 1 is the structural representation of the utility model direct cooling refrigerator first embodiment;

Fig. 2 is the structural representation of the utility model direct cooling refrigerator second embodiment;

Fig. 3 is the refrigerant flow direction schematic diagram of the utility model direct cooling refrigerator when carrying out refrigerating operaton;

Fig. 4 is the refrigerant flow direction schematic diagram of the utility model direct cooling refrigerator when defrosting.

The specific embodiment

As shown in Figure 1, in an embodiment of the direct cooling refrigerator that provides according to the utility model, be connected with compressor 1 in turn by the refrigerant flow direction, condenser 2, filter 9, capillary 3, F evaporimeter 4, R evaporimeter 5, reservoir 10, refrigerant exit end at compressor 1, the refrigerant bypass device is by the bypass of the first switching device three-way solenoid valve, 6 controls when being connected with the defrost that makes the refrigerant that flows out from compressor can directly flow to F evaporimeter 4 (freezer evaporator) entrance point, can carry out defrost the F evaporimeter 4 with directly delivering to from the high temperature refrigerant of compressor 1 output, being provided with the defrost branch road and being assisted capillary 7 between F evaporimeter 4 and R evaporimeter 5 and controlling its second switch device that whether acts on is bidirectional electromagnetic valve 8, can guarantee that refrigerating chamber is when defrost, R evaporimeter 5 can continue refrigeration, and refrigerating chamber can not heat up.

In above-mentioned refrigerator structure, refrigerant bypass embodiment when the utility model provides two kinds of defrosts, as shown in Figure 1 a kind of, adopt a three-way solenoid valve as first switching device, the entrance point of three-way solenoid valve 6 is connected with the refrigerant exit end of compressor 1, and an outlet of three-way valve 6 is connected with the import contact of condenser 2, its another outlet is connected with the import contact of F evaporimeter 4, this refrigerant bypass device when defrosting, can thoroughly turn-off the refrigerant that flows to condenser 2.

The another kind of first switching device realizes that as shown in Figure 2 adopt a bidirectional electromagnetic valve 6, an interface of bidirectional electromagnetic valve 6 is connected with the refrigerant exit end of compressor 1, and its another interface is connected with the entrance point of F evaporimeter 4; Adopt the refrigerant bypass of this structure, when defrosting, the shutoff of refrigerant that flows to condenser 2 is not thorough.

Auxiliary defrost branch road and control thereof can adopt assisted capillary 7 as shown in Figure 1 to realize with the structure that bidirectional electromagnetic valve 8 is connected in parallel, this magnetic valve 8 is connected when refrigeration, during defrosting, magnetic valve 8 turn-offs, and also can adopt the electric expansion valve with same function to realize this bidirectional electromagnetic valve function.

Refrigerant during the refrigerator refrigeration flows to as shown in Figure 3, three-way solenoid valve 6 is in compressor 1 outlet and condenser 2 connected states, and disconnect from the by-pass line that compressor 1 leads to F evaporimeter 4, condenser 2 heat releases, 4 heat absorptions of F evaporimeter, bidirectional electromagnetic valve 2 also is in conducting state, and assisted capillary 7 is inoperative, R evaporimeter 5 also absorbs heat, and refrigerator normally freezes; The cold-producing medium circulation as shown in Figure 4 when refrigerator needed defrost, three-way solenoid valve 1, compressor 1 outlet constitutes path with F evaporimeter 4 inlets, and compressor 1 leads to the pipeline disconnection of condenser 2, the pipeline conducting of leading to

F evaporimeter

4,4 heat releases of F evaporimeter, this moment, bidirectional electromagnetic valve 8 was in off-state, cold-producing medium is through assisted capillary 7,5 heat absorptions of R evaporimeter, and refrigerator is in defrost state.

Adopt the refrigerator of the foregoing description, have: 1) freezer compartment of refrigerator defrost time weak point, each about 20 minutes of defrost time in the advantage that defrosts; 2) refrigerating chamber can normally use (because refrigerating chamber when the refrigerating chamber defrost also in normal refrigeration) during the freezer compartment of refrigerator defrost; 3) utilize computer control, can make the direct cooling refrigerator of full-automatic or automanual refrigerating chamber defrost.

The utility model defrosting structure is equally applicable to adopt air-cooled and direct-cooled refrigerator.

Claims

1, a kind of direct cooling refrigerator, comprise the compressor (1) that constitutes the refrigerant loop, condenser (2), capillary (3), F evaporimeter (4), R evaporimeter (5), it is characterized in that, described compressor (1) outlet is communicated with described condenser (2) inlet, and when defrost, make described compressor (1) outlet and first switching device (6) that described F evaporimeter (4) inlet communicates, also comprise being serially connected in the assisted capillary (7) between described F evaporimeter (4) outlet and the described R evaporimeter (5) and being connected across described assisted capillary (7) two ends being used for conducting when refrigeration, the second switch device (8) that defrost disconnects.

2, according to the described direct cooling refrigerator of claim 1, it is characterized in that, described first switching device (6) is a three-way solenoid valve, the entrance point of described three-way valve is connected with the port of export of described compressor (1), a port of export of described three-way valve is connected with the entrance point of described condenser (2), and its another port of export is connected with described F evaporimeter (4) entrance point.

According to the described direct cooling refrigerator of claim 2, it is characterized in that 3, described second switch device (8) is a bidirectional electromagnetic valve.

According to the described direct cooling refrigerator of claim 2, it is characterized in that 4, described second switch device (8) is an electric expansion valve.

5, according to the described direct cooling refrigerator of claim 1, it is characterized in that, described first switching device (6) comprises bidirectional electromagnetic valve, and an interface of described bidirectional electromagnetic valve is connected with the refrigerant exit end of described compressor (1), and its another interface is connected with the entrance point of described F evaporimeter (4).

According to the described direct cooling refrigerator of claim 5, it is characterized in that 6, described second switch device (8) is a bidirectional electromagnetic valve.

According to the described direct cooling refrigerator of claim 5, it is characterized in that 7, described second switch device (8) is an electric expansion valve.

8, according to any one described direct cooling refrigerator among the claim 1-7, it is characterized in that, between described condenser (2) and described capillary (3), be connected with filter (9).

9, according to any one described direct cooling refrigerator among the claim 1-7, it is characterized in that, between described evaporimeter (5) and described compressor (1), be connected with reservoir (10).