CN2156453Y

CN2156453Y - Defrost device for freezer

Info

Publication number: CN2156453Y
Application number: CN 93205123
Authority: CN
Inventors: 康狄恩
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-12
Filing date: 1993-03-12
Publication date: 1994-02-16
Anticipated expiration: 2003-03-12

Abstract

The utility model relates to a defrost device for freezer. A regenerator is added on a refrigerating device to store the afterheat of the liquid refrigerant of the refrigerating device. A defroster which has the function of a heat-conductive pipe is formed between the regenerator and the evaporating pipe of the refrigerating device by a pipeline and a control valve. The heat of the regenerator is transferred to the evaporating pipe to make the evaporating pipe defrost by heated without increasing the outside electric energy. The utility model can also enhance the freezing efficiency of the refrigerating device.

Description

Defrost device for freezer

The utility model relates to a kind of defroster, particularly a kind of need not increase electric power or other outside resources can make the defroster of evaporator defrost in freezing equipment or the device.

No matter be in the freezing or cold storage plant of family or commercial usefulness, all need have the device of defrost function, to eliminate the frost of being tied on the evaporimeter; And general Defrost mode or electrification heating fumigators, or use the opposite direction drive manner of refrigerating plant to make evaporator defrost, and no matter that a kind of mode all needs complex control apparatus, so must expend higher manufacturing cost, and must use the extraneous power supply that provides, not good on economic benefit, and be worth being improved again.

Main purpose of the present utility model is to provide a kind of power saving type defroster, and it need not increase electric power or other outside resources can make the interior evaporator defrost of refrigerating plant, thereby the efficient that can save the energy, promote refrigerating plant.

The defroster of freezing equipment of the present utility model, its be located at have compressor, in the refrigerating plant of escape pipe, condenser, liquid line, expansion valve, evaporimeter and muffler; Be provided with inside on the liquid line between condenser and the expansion valve and be filled with the thermal storage device of heat accumulating, on the liquid line before the thermal storage device and be provided with bypass line between the muffler, be respectively equipped with freezing control valve on the liquid line after condenser and on the muffler before the compressor, the two ends that reach expansion valve on bypass line are respectively equipped with the defrosting control valve; Liquid line, thermal storage device, defrosting control valve, evaporimeter, muffler and bypass line constitute a defroster.

Described defrosting control valve can be arranged on the independent pipeline by thermal storage device and evaporimeter, is positioned at the thermal storage device two ends, and the liquid line of refrigerating plant is filled with refrigerant by thermal storage device inside in the described independent pipeline.

The utlity model has following effect:

(1) promote freezing efficiency: the setting that utilizes thermal storage device is to absorb the used heat that is had in the liquid cryogen, can make the liquid cryogen in the refrigerating plant have lower temperature, and then make liquid cryogen in the evaporation tube of refrigerating plant, can produce more significant freezing effect, so the utility model can improve the efficient of refrigerating plant.

(2) make full use of existing apparatus and obtain defrosting effect: utilize the setting of thermal storage device, control valve, the connection of suitable pipeline can on the refrigerating plant basis, constitute a defroster in addition, in this defroster, the action principle of similar heat pipe can reach the purpose that makes evaporimeter be heated and defrost with the heat that thermal storage device was provided.

(3) effectively utilize the energy, reduction energy use amount: the stored heat of thermal storage device is the used heat that the liquid cryogen of refrigerating plant was had before entering evaporimeter, thermal storage device absorbs the freezing efficiency that used heat not only can promote refrigerating plant, when refrigerating plant shuts down, thermal storage device can provide heat to make the evaporimeter defrosting of being heated, so the utility model can be issued to the purpose of the evaporator defrost that makes refrigerating plant in the situation that does not increase outside resources, comparing with refrigerating plant in the past has more the advantage that reduces energy use amount.

Below by most preferred embodiment and accompanying drawing defroster of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is the structural representation of the utility model preferred embodiment;

Fig. 2 is the structural representation of another preferred embodiment of the utility model.

As shown in Figure 1, it is the structural representation of the utility model preferred embodiment, present embodiment mainly comprises by compressor 10, escape pipe 11, condenser 12, liquid line 13, expansion valve (or capillary) 14, the refrigerating plant that evaporimeter 15 and muffler 16 are connected to form in regular turn, on the liquid line 13 between condenser 12 and the expansion valve 14, be provided with an inside and be filled with the thermal storage device 21 of heat accumulating 211, be provided with a bypass pipe road 22 on the liquid line before the thermal storage device 21 13 and between the muffler 16 in addition, and on the liquid line after condenser 12 13, be respectively equipped with freezing control valve 17 on the muffler 16 before the compressor 10,18, the two ends that reach expansion valve 14 on bypass line 22 are respectively equipped with defrosting control valve 23,24, make via part liquid line 13, thermal storage device 21, defrosting control valve 24, evaporimeter 15, partly muffler 16 and bypass line 22 constitute defroster with another defrosting control valve 23.

The utility model is to make refrigerating plant work under normal operating position, at this moment, freezing control valve 17,18 open, defrosting control valve 23,24 close, compressor 10 runnings make refrigerant (refrigerant) send via escape pipe 11, and enter into condenser 12, condensing because of heat radiation at this gaseous refrigerant becomes liquid cryogen, then liquid refrigerants is via liquid line 13, flow through thermal storage device 21 inside so that heat accumulating 211 heat, the temperature of liquid cryogen itself is reduced once again, and this cold excessively liquid refrigerant can have higher heat absorption capacity, at the expansion valve 14 of flowing through, after entering evaporation tube 15, liquid cryogen will absorb heat and evaporate, produce freezing effect, then, gaseous refrigerant flows back to compressor 10 via muffler 16, so do action reaches the purpose that freezing effect is provided.

When the evaporimeter 15 of the utility model refrigerating plant need defrost operation, as long as compressor 10 is shut down, and close freezing control valve 17,18, defrosting control valve 23,24 is opened, then by shown in Figure 1 know find out that defroster will turn round voluntarily and reaches the purpose that makes evaporation tube 15 defrosting this moment under the situation that does not increase extraneous electric power; As shown in Figure 1, when freezing control valve 17,18 close, defrosting control valve 23, during 24 unlatchings, compressor 10 will be isolated with condenser 12, at this moment liquid line 13 partly, thermal storage device 21, defrosting control valve 24, evaporimeter 15, partly muffler 16 and bypass circulation 22 constitute a defroster with another defrosting control valve 23, this device effect such as same heat pipe, the position is lower but part that temperature is higher comprises liquid line 13, thermal storage device 21 effects as same evaporimeter 101(such as frame of broken lines are illustrated), and the position is higher, 15 in evaporimeter that temperature is lower as same condenser 102(such as frame of broken lines are illustrated), when the refrigerant in the defroster absorbs heat in thermal storage device 21 and after vaporizing, gaseous refrigerant will be entered the evaporimeter 15 of low temperature by bypass pipe 22 and muffler 16, condense and heat release at this gaseous refrigerant, make evaporimeter 15 defrost, and the liquid cryogen after condensing by the gravity effect down flow through the defrosting control valve 24 get back in the thermal storage device 21, heat absorption evaporation more then, so circulation is sent to evaporimeter 15 with heat by thermal storage device 21 and reaches the defrosting purpose.

The required total amount of heat of relevant evaporimeter 15 defrostings, can obtain as calculated, but and then the enough thermal storage devices 21 of design capacity, when the temperature of 15 in thermal storage device 21 and evaporimeter tends to balance, the process that heat energy transmits promptly stops, and also makes the defrosting effect stop simultaneously, at this moment, can make refrigerating plant reply action again, control valve 23 and 24 will be closed, freezing control valve 17 and 18 is opened as long as will defrost.

Be the structural representation of another preferred embodiment of the utility model as shown in Figure 2, in the present embodiment, include the compressor 30 that is connected in regular turn in the refrigerating plant equally, escape pipe 31, condenser 32, liquid line 33, expansion valve 34, evaporimeter 35, and muffler 36, setting by independent pipeline 40 can make refrigerating plant and defroster separate, defroster is by thermal storage device 41, independent pipeline 40 by thermal storage device 41, and be located on the pipeline 40 and be positioned at the defrosting control valve 43 at thermal storage device 41 two ends, 44 constitute, independent pipeline 40 is by the evaporimeter 35 of refrigerating plant, the liquid line 33 of refrigerating plant then passes through thermal storage device 41 inside, and is filled with an amount of refrigerant in the independent pipeline 40 of defroster.

When present embodiment turns round at refrigerating plant, defrosting

control valve

43,44 must be closed, so the running by compressor 30 makes liquid cryogen via escape pipe 31, condenser 32, liquid line 33, thermal storage device 41, expansion valve 34, evaporimeter 35 and muffler 36 heat is stored in the thermal storage device 41; When evaporimeter 35 desires of refrigerating plant defrost, compressor 30 control valve 43 that shuts down and defrost, 44 open, so defroster becomes a heat pipe, refrigerant in the independent pipeline 40 will absorb the heat accumulation in the thermal storage device 41 and evaporate becomes gaseous refrigerant, enter the evaporimeter 35 of low temperature via defrosting control valve 44, condense and heat release at this gaseous refrigerant, make evaporimeter 35 defrost, and the liquid cryogen after condensing by the gravity effect down flow through the defrosting control valve 43 get back in the thermal storage device 41, heat absorption evaporation more then, so ringing is sent to evaporimeter 35 with heat by thermal storage device 41 and makes it reach the purpose of defrosting.

In sum, the design of defroster of the present utility model reaches the purpose of the evaporator defrost that makes refrigerating plant really, and have freezing efficiency that refrigerating plant is provided, effectively use the energy, reduce the advantage of energy use amount.

Claims

1, a kind of defroster of freezing equipment, its be located at have compressor, in the refrigerating plant of escape pipe, condenser, liquid line, expansion valve, evaporimeter and muffler; It is characterized in that: be provided with the thermal storage device that inside is filled with heat accumulating on the liquid line between condenser and the expansion valve, on the liquid line before the thermal storage device and be provided with bypass line between the muffler, be respectively equipped with freezing control valve on the liquid line after condenser and on the muffler before the compressor, the two ends that reach expansion valve on bypass line are respectively equipped with the defrosting control valve; Liquid line, thermal storage device, defrosting control valve, evaporimeter, muffler and bypass line constitute a defroster.

2, the defroster of freezing equipment according to claim 1, it is characterized in that: described defrosting control valve is arranged on the independent pipeline by thermal storage device and evaporimeter, be positioned at the thermal storage device two ends, the liquid line of refrigerating plant is filled with refrigerant by thermal storage device inside in the described independent pipeline.