CN2524163Y

CN2524163Y - Counterflow pipe coiled heat exchanger

Info

Publication number: CN2524163Y
Application number: CN 02204830
Authority: CN
Inventors: 李进龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-01
Filing date: 2002-02-01
Publication date: 2002-12-04
Anticipated expiration: 2012-02-01

Abstract

The utility model relates to a counterflow pipe coiled heat exchanger which is used for exchanging heat between refrigeration agent and water. The utility model is suitable to be used in mini air-cooled cold(hot) water center air conditioner unit. The utility model comprises a rectangle shell, a coiled pipe and an electric heating device which are arranged in the shell, a liquid distributing device and an air collecting box which are connected with the exit of the coiled pipe, a water inlet, a water outlet, a dirt washing port, a sewage draining port, a temperature sensor mounting seat, a spoiler and a cross steam plate bracket. The inner part of the shell is divided into a plurality of snakelike water flow channel by a guide separator. The inner wall of the water flow channel is provided with the spoiler and the cross steam plate bracket. The refrigeration agent lateral channel takes a snakelike bent coiled pipe of 180DEGs. The electric heating device also takes a snakelike coiled pipe shape. The utility model has the advantages of overcoming the problems of fibre welded heat exchanger, even liquid distributing of the refrigeration agent, being capable of arranging the heat exchanger vertically or horizontally, freeze resistance and strong anti-jamming capability. Besides, the electrical heating device is arranged inside the shell, thereby proving a heat source for melting ice, and the heat source also can be used as an assistant heat source of heat pump work status.

Description

The counter-current tray pipe heat exchanger

The utility model relates to a kind of heat exchanger, in particular for carrying out the counter-current tray pipe heat exchanger of heat exchange between cold-producing medium-water.

At present, refrigerating capacity is brazing plate type heat exchanger at the employed cold-producing medium-water-to-water heat exchanger of the integral type of 7～20KW small-sized air-cooled cold (heat) water central air-conditioning unit, by heat exchange between plate, cold-producing medium evaporation heat absorption (or condensation heat release) is passed to water with cold (or heat), with water pump water is delivered to indoor end equipment again.

The plate gap of brazing plate type heat exchanger is 2～3mm, adopt the brazing material welding fabrication, through the actual use in small central air conditioning in recent years, generally run into the following intrinsic problem of plate type heat exchanger: reduce owing to cold-producing medium between the plate of front and back distributes the uneven evaporating temperature that causes, refrigerating capacity reduces, and a part of unevaporated cold-producing medium is got back to the compressor air suction mouth and caused liquid hammer simultaneously; The little water side in plate gap is easily stopped up by impurity, and discharge reduces to cause that the refrigerant side evaporating temperature descends, and causes water freezing between plate; Because a variety of causes causes when the water large tracts of land is frozen between plate, can make the weld bond spalling of heat exchanger, causes cold-producing medium to mix with water, the water inlet short circuit is burnt in the compressor; When small size froze, even the soldering mouth not by spalling, also can cause the water route to stop up, owing to there is not the ice-melt thermal source, unit can not be resumed work for a long time; Because liquid cold-producing medium method of salary distribution restriction between plate, brazing plate type heat exchanger can only vertically be placed in unit, can not horizontal positioned, and it is many to take in the machine space.

For overcoming the existing existing intrinsic problem of brazing plate type heat exchanger, the utility model provides a kind of counter-current tray pipe heat exchanger, can make the refrigerant side separatory even, but heat exchanger integral body horizontal positioned is not afraid of frost heave, and anti-blockage capability is strong, in the housing electric heater is installed simultaneously, the ice-melt thermal source is provided.

The technical scheme that its technical problem that solves the utility model coil exchanger adopts is: whole copper pipe curved continuously have 180 ° of curved serpentine coils, with whole electric heating tube curve continuously have 180 ° curved coil-like, make the flat rectangular case with steel plate, intake-outlet is arranged on the housing, there is the temperature sensor mount pad at housing delivery port place, enclosure interior has the diaphragm that has flow spoiler that equates with the tube pitch of serpentine coil, the per two groups of one decks of at least ten group coil pipes are put into rectangular case, fix with the distributary board mount between the coil pipe layer, the circular hole of the entrance end of each coil pipe by the housing side reach housing outer and with the housing welded seal, coil-like electric heater inserted import and export in the housing installing hole of homonymy with coil pipe and sealing and fixing with it, then with the housings close welding forming, the entrance point welding knockout of coil pipe, the port of export welding collector box of coil pipe, housing bottom near the knockout end has sewage draining exit, scale removal flushing inlet is arranged at the housing top near collector box, collector box is divided into base and lid two parts, adopt the integrally stretching moulding respectively, quantity with the serpentine coil outlet is arranged on the base, the corresponding circular hole of position and diameter, there is the tube connector installing hole lid side, base is set to the coil pipe outlet and goes up and coil pipe and seal welding, lid side welding connecting tube becomes collector box with base with the lid Combination Welding then.

The operation principle of the utility model coil exchanger is, during cooling condition, after the throttling of cold-producing medium process expansion valve, in each group serpentine coil, evaporate heat absorption through the knockout mean allocation, get back to compressor by the collector box of serpentine coil outlet at last, water enters the housing runner from the housing water inlet near the collector box side, under the effect of flow spoiler and distributary plate, in coil pipe, walk mobile, housing delivery port by the knockout side flows out housing at last, the flow direction of water is opposite with the flow direction of cold-producing medium, realize reverse efficiently turbulent-flow heat-exchanging, when the water freezing in the housing, temperature sensor provides the electric heater enabling signal and carries out ice-melt, during heating condition, electric heater can start additional heat energy deficiency at any time.

The principle of the utility model coil exchanger frost heaving resistant is, when considering that housing water freezes fully, water volume increases 5%, because employing is the flattened rectangular housing, so housing bulges thereupon, but in the elastic deformation area of case material, the distortion of ice-out back casing is restored fully, and the housing weld seam is unaffected, during water freezing, copper pipe is in the uniform-compression state, can not produce distortion, and the frost heaving resistant performance confirms through test of many times.

When the utility model coil exchanger needs horizontal positioned,, keep the knockout import to get final product straight up as long as change cold-producing medium knockout setting angle.

The utility model coil exchanger housing water route runner is a shiny surface, does not have the acute angle projection, and the impurity batting in the water can not stop in shell for a long time, and performance of anti-blockage confirms through test of many times.

Describe the utility model embodiment in detail below in conjunction with accompanying drawing.

The utility model counter-current tray pipe heat exchanger is made up of leg 1, delivery port 2, knockout 3, front panel 4, coil-like electric heater 5, water inlet 6, tube connector 7, scale removal flushing inlet 8, rear board 9, gusset plate 10, serpentine coil 11, diaphragm 12, flow spoiler 13, distributary board mount 14, collector box base 15, gas collection lid 16, end plate 17, temperature sensor mount pad 18, sewage draining exit 19, clamp nut 20

Housing is by leg 1, front panel 4, rear board 9, gusset plate 10, diaphragm 12 is formed, delivery port 2, water inlet 6, temperature sensor mount pad 18 is welded on the front panel 4, scale removal flushing inlet 8, sewage draining exit 19 is welded on the outside of side plate 10, flow spoiler 13 is welded on the diaphragm 12, play turbulence level that increases current and the effect of supporting serpentine coil 11, distributary board mount 14 is welded on side plate 10 inboards of article one and the last item water stream channel, play the effect that makes serpentine coil 11 location and change the direction of a stream of water, serpentine coil 11 passes end plate 17 and welding is fixing with it, capillary on the knockout 3 injects 11 li of serpentine coils and welding is fixing with it, collector box base 15 is enclosed within on the serpentine coil 11 and welding is fixing with it, gas collection lid 16 is buckled on the collector box base 15 and welding is fixing with it, tube connector 7 passes end plate 17 and uses clamp nut 20 sealing and fixing with gas collection lid 16 welding, electric heater 5.

Claims

1, a kind of counter-current tray pipe heat exchanger that is used for carrying out between cold-producing medium-water heat exchange, comprise housing, be placed on coil pipe and electric heater in the housing, import and export knockout and the collector box that is connected with coil pipe, and the water inlet on the housing, delivery port, scale removal flushing liquor mouth, sewage draining exit, temperature sensor mount pad, flow spoiler and distributary board mount, it is characterized in that: the snakelike water stream channel that rectangular case inside is separated out by diaphragm, the internal face of water stream channel is equipped with flow spoiler and distributary board mount, and the refrigerant side passage is to have the snakelike curved coil pipe of 180 degree.

2, be used for carrying out between cold-producing medium-water the counter-current tray pipe heat exchanger of heat exchange as described in requiring as right 1, it is characterized in that: enclosure interior is equipped with electric heater.

3, be used for carrying out between cold-producing medium-water the counter-current tray pipe heat exchanger of heat exchange as described in requiring as right 1, it is characterized in that: the refrigerant side collector box of forming by base and lid

4, be used for carrying out between cold-producing medium-water the counter-current tray pipe heat exchanger of heat exchange as described in requiring as right 1, it is characterized in that: rectangular case top is equipped with scale removal flushing liquor mouth.

5, be used for carrying out between cold-producing medium-water the counter-current tray pipe heat exchanger of heat exchange as described in requiring as right 1, it is characterized in that: the rectangular case bottom is equipped with sewage draining exit.

6, be used for carrying out between cold-producing medium-water the counter-current tray pipe heat exchanger of heat exchange as described in requiring as right 1, it is characterized in that: the rectangular case bottom is equipped with the temperature sensor mount pad.