CN2357287Y

CN2357287Y - Defroster using high-temp high-pressure refrigerator

Info

Publication number: CN2357287Y
Application number: CN 98243569
Authority: CN
Inventors: 隋大明; 王成; 于晓红
Original assignee: Qingdao Haier Freezing Equipment Co ltd; Haier Group Corp
Current assignee: Qingdao Haier Freezing Equipment Co ltd; Haier Group Corp
Priority date: 1998-11-20
Filing date: 1998-11-20
Publication date: 2000-01-05
Anticipated expiration: 2008-11-20

Abstract

The utility model relates to a defroster using high-temp high-pressure refrigerant; four-way valves are arranged on a liquid inlet pipe and a liquid outlet pipe; simultaneously, a one-way valve which is connected with an adjustable expansion valve in parallel is arranged in the liquid outlet pipe; the flow direction of the refrigerant in the pipes is changed by adjusting the four-way valves; if the utility model is not provided with the one-way valve and the four-way valves, the liquid outlet pipe which does not pass through a condenser is provided with a single-closed type two-position control valve which is connected with the adjustable expansion valve in parallel. Compared with independently using an electric heating pipe to heat an evaporator for defrosting, the utility model is quick in defrosting and thawing to the evaporator; the utility model can reduce article storage loss, with convenient operation and simple installation.

Description

Utilize the high-temperature high-pressure refrigerant defroster

A kind of high-temperature high-pressure refrigerant defroster that utilizes.

The utility model belongs to refrigeration plant evaporator defrost device, more particularly is the improvement to the refrigeration plant Defrost technology.

Before the utility model, for the finned evaporator of freezer, commercial show cabinet etc.,, absorb the heat of fin space air in a large number owing to the step-down that the cold-producing medium after the high pressure throttling enters evaporimeter, realized process of refrigerastion; The compressed machine of cold-producing medium after the heat exchange finished enters condenser the heat that absorbs is distributed to air, in this course, evaporator fin is when absorbing the air heat, also airborne steam is condensed in evaporator surface Cheng Shuan, frost is tied thick gradually, have a strong impact on refrigeration, so refrigeration system must be installed defroster, the defroster that prior art generally adopts is that electric heating tube is placed the evaporator fin surface, the cold-producing medium circulation in halt system, and energising is heated to electric heating tube, and impel the frost that coagulates of evaporator surface to be melted into outside the water discharge system, defrosting is finished, and stops electrical heating, restarts compressor and enters kind of refrigeration cycle process for the second time; There is following shortcoming in this Defrost mode: 1, power consumption height, and power requirement is higher, and defrosting time is longer, causes certain loss to reserve.2, because electricity is higher as thermal power, the also corresponding increasing of electrical matching is invested bigger, uneconomical.

The purpose of this utility model is to overcome the deficiency of prior art, has proposed new design, and a kind of high-temperature high-pressure refrigerant defroster that utilizes is provided.

Main points of the present utility model realize by following technical measures, it includes press, condenser, adjustable expansion valve, drain pipe, liquid back pipe, check valve, cross valve, evaporimeter, electrothermal tube, two control valves of single enclosed and combines, cross valve is to be connected on drain pipe and the liquid back pipe, adjust cross valve the flow direction of tube refrigerant is changed, simultaneously the check valve of loading onto in parallel on drain pipe with adjustable expansion valve; As without cross valve and check valve, also can be installed in parallel two control valves of single enclosed without condenser and adjustable expansion valve on the drain pipe, this valve can be a common valve also, and the time spent opens, and the time spent does not shut; Electrothermal tube can be coated at fin surface, also can put between fin.

Below in conjunction with drawings and Examples, the utility model further is illustrated.

Fig. 1 utilizes high-temperature high-pressure refrigerant defroster system flow schematic diagram, and Fig. 2 utilizes the high-temperature high-pressure refrigerant defroster to remove the schematic flow sheet of installing two control valves of single enclosed behind cross valve and the check valve.

Among the figure, the 1st, condenser, 2, be adjustable expansion valve, 3, be check valve, 4, be evaporimeter, 5, be electrothermal tube, 6, be cross valve, 7, be press, 8, be liquid back pipe, 9, be drain pipe, the 10th, two control valves of single enclosed.

Among Fig. 1, in process of refrigerastion, refrigeration is sharp by press 7, enter condenser 1 through cross valve 6 along drain pipe 9, enter evaporimeter 4 through condensed cold-producing medium after adjustable expansion valve 2 throttlings, a large amount of heats that absorb are realized refrigeration in evaporimeter, then cold-producing medium returns in the press 7 through cross valve 6 along liquid back pipe 8 again, finishes circulation; When evaporimeter coagulates frost more for a long time, adjust cross valve 6, start press 7, this moment, the cold-producing medium of HTHP promptly entered evaporimeter 4 by cross valve 6 along liquid back pipe 8, evaporimeter 4 is carried out heat exchange heat, after check valve 3 enters condenser 1 along drain pipe 9, enter press 7 through cross valve 6 again, finish circulation; Check valve 3 is that the control cold-producing medium flows to a direction, open wide when having only cold-producing medium to flow backwards, when starting press and make high-temperature high-pressure refrigerant flow backwards the circulation defrosting, to connect power supply simultaneously and make electrothermal tube 5 heating, electrothermal tube 5 is coated electric wire tubes on evaporimeter 4 outside fins.Among Fig. 2, in being in process of refrigerastion, cold-producing medium enters in the condenser 1 along drain pipe 9 through press 7, close two control valves 10 of single enclosed this moment, enters in the evaporimeter 4 heat absorption in a large number in evaporimeter 4 again through adjustable expansion valve 2 throttlings, realize refrigeration, cold-producing medium after the refrigeration turns back in the press 7 along liquid back pipe 8, finishes circulation, when how frosting outside the evaporimeter need defrost, open two control valves 10 of single enclosed, start press 7, the cold-producing medium of HTHP is promptly along drain pipe 9, enter in the evaporimeter 4 through two control valves 10 of single enclosed, connect power supply this moment, coated heating tube 5 on evaporimeter 4 fins, and heating promptly heats up, inside and outside all heating of evaporimeter 4 like this, coagulate the very fast thawing of frost, return again in the press 7 along liquid back pipe 8 in the cold-producing medium flash-pot 4, finish circulation.Present embodiment is to have made a Tianwan businessman to use showcase, and this cabinet evaporimeter is 2.20 * 0.30 * 0.15m, and central tube is copper tube Ф 18mm; Spacing of fin 8mm, for aluminium is made, its fin outside is covered with the electric heating tube of 1000W; Adjustable expansion valve refrigeration work consumption is 4KW, and two control valves of cross valve and single enclosed are Ф 10mm, drain pipe Ф 12mm, go out 80 ℃ of liquid temps, liquid back pipe Ф 18mm returns 10 ℃ of liquid temps, condenser fin is that aluminium flake is made spacing 5mm, central tube is a Ф 10mm copper pipe, and press is 1.5PH, uses the foregoing description to evaporator defrost, than saving time half with conventional electrical heating type defrosting, only promptly finished, and conventional electric heating tube power is 2000W that speed is also slow with 20 minutes.

Compared with the prior art the utility model has following advantage, has overcome the power consumption height, and defrosting time is long And to the damnous drawback of storing, reached the economical and practical purpose of quickly defrosting, it is simultaneously easy to operate, Install simply, economical and technical benefit is obvious.

Claims

1, a kind of high-temperature high-pressure refrigerant defroster that utilizes, it includes press, condenser, adjustable expansion valve, check valve, cross valve, evaporimeter, electric heating tube, drain pipe, liquid back pipe and two control valves of single enclosed and combines, it is characterized in that cross valve is to be connected on drain pipe and the liquid back pipe, adjust cross valve the flow direction of tube refrigerant is changed, on drain pipe, be installed in parallel check valve simultaneously with adjustable expansion valve.

2, according to the described high-temperature high-pressure refrigerant defroster that utilizes of claim 1, it is characterized in that as without cross valve and check valve, also can be on drain pipe, be installed in parallel two control valves of single enclosed without condenser and adjustable expansion valve, this valve also can be a common valve, time spent opens, and the time spent does not shut.

3, according to claim 1 or the 2 described high-temperature high-pressure refrigerant defrosters that utilize, it is characterized in that electric heating tube can be coated at fin surface, also can be between fin.