CN203083211U - Distributor used in falling film evaporator - Google Patents

Abstract

The utility model discloses a distributor used in a falling film evaporator. The distributor comprises a baffle, a pressure box and a gravity box, wherein firth through holes are evenly and densely distributed at the bottom of the gravity box, a plurality of partition plates are installed at the bottom of the gravity box along the width direction, the pressure box is installed inside the gravity box, a gap is formed between the periphery of the pressure box and the periphery of the gravity box, second through holes are densely distributed at the top of the pressure box, the baffle is installed above the pressure box, two sides of the baffle are fixed on the gravity box, the edges of the baffle are provided with hole plates, cover plates are installed on the hole plates, gaps are formed between the hole plates and the cover plates to form air outlet channels, and the baffle is provided with an inlet tube which is communicated with the pressure box. According to the distributor, pressure potential energy and gravity potential energy are mutually matched to distribute refrigerant working media, reliability is high, uniformity is good, uniformity of liquid distribution can be achieved, the refrigerant working media can be prevented from splashing and leaking, and pressure loss is small. The distributor is matched with the falling film evaporator, can give full play to performance advantages of the falling film evaporator, and is good in manufacturability.

Description

The distributor that is used for downward film evaporator

Technical field

The utility model relates to evaporator part, refers to a kind of distributor that is used for downward film evaporator particularly.

Background technology

The course of work of downward film evaporator generally is: from becoming the fluid-mixing of cryogenic liquid and cryogenic gas after condenser carries the high temperature condensed fluid come by throttling arrangement (as: electric expansion valve, restricting orifice etc.) throttling expansion, enter the distributor in the downward film evaporator then, as required through laterally, vertically or 3 layers, 4 layers, the moving back of 5 laminar flows flow out distributor gear, drip and drench on the heat exchanger tube, cold is passed to the user, after self is evaporated, enter the air entry of compressor, enter condenser after the compression.Wherein, in said process, the uniform distribution of refrigerant medium is very important, distributor gear is in core position in each parts of falling film evaporator, and at present in the downward film evaporator distributor gear still not ideal enough on the distributed uniform degree, can not reach requirement, therefore, for guaranteeing the uniform distribution of refrigerant medium, it is very necessary designing a kind of distributor gear reasonable and precision machining.

Summary of the invention

The purpose of this utility model is to provide a kind of distributor that is used for downward film evaporator at the problems referred to above, and this distributor can be realized the uniform distribution of refrigerant medium, thereby provides good running environment for downward film evaporator.

For achieving the above object, the technical solution adopted in the utility model is: a kind of distributor that is used for downward film evaporator, it comprises baffle plate, pressure cell and gravity box, described gravity box bottom evenly is densely covered with first through hole and broad ways is provided with the polylith dividing plate, in the gravity box pressure cell is housed, leave the gap around the described pressure cell with around the gravity box, the top of described pressure cell evenly is densely covered with second through hole, the top of described pressure cell is provided with baffle plate, the both sides of described baffle plate are fixed on the described gravity box, the edge of described baffle plate is provided with orifice plate, orifice plate is provided with cover plate, leave the gap between orifice plate and cover plate and form air drain, described baffle plate is provided with inlet tube, and described inlet tube is communicated with described pressure cell.

The utility model cooperates equal liquid by pressure cell with the gravity box, the gas-liquid mixed refrigerant medium enters bottom surface and peripheral all pressure cells of sealing from inlet tube, second through hole from the pressure cell top evenly sprays then, scatter around impacting on baffle plate, liquid runs down baffle plate side in the gas-liquid mixed refrigerant medium is along falling into the gravity box then, first through hole from gravity box bottom evenly flows out at last, continuously flow on the heat exchanger tube of its below, and the gas in the gas-liquid mixed refrigerant medium is discharged from the outgassing groove between orifice plate and cover plate, sucked by compressor, this employing pressure potential and the gravitional force distribution refrigerant medium that cooperatively interacts, gas coolant working medium is separated in the gravity box with liquid coolant working medium, and separatory reliability height, good uniformity, can realize that separatory is even, prevent the refrigerant medium leakage of splashing, and the pressure loss is little; Downward film evaporator in the utility model and the refrigeration industry is complementary, and can give full play to the performance advantage of falling film evaporator; The utility model is simple and compact for structure, good manufacturability.

Preferably, the quantity of second through hole in the described pressure cell is: 15～150, the aperture of described second through hole is: 4mm～40mm.Utilize pressure potential to realize the uniform distribution first time of refrigerant medium in second through hole, but the second through hole homogenize liquid that evenly gathers stream prevent that the refrigerant medium that sprays from splashing from pressure cell.

Further preferably, the quantity of first through hole in the described gravity box is: 800～4000, the aperture of described first through hole is: 2mm～10mm.Utilize gravitional force to realize the final uniform distribution of refrigerant medium in first through hole.

Description of drawings

Fig. 1 is the structural representation of the distributor in the downward film evaporator.

Fig. 2 is the decomposition texture schematic diagram of Fig. 1.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, is convenient to more clearly understand the utility model, but they do not constitute qualification to the utility model.

As Fig. 1, shown in Figure 2, a kind of distributor that is used for downward film evaporator, it comprises and being rectangle and gravity box 1 that the top is opened wide, described gravity box 1 bottom evenly is densely covered with the first circular through hole 101, described gravity box 1 bottom broad ways evenly is provided with four elongated dividing plates 102 parallel to each other, described dividing plate 102 is provided with the pressure cell 2 that rectangle is hollow form, the outside sidewall 4 of described pressure cell 2 and 5 of the inside side walls of gravity box 1 leave the gap, that is: in the gravity box 1 pressure cell 2 is housed, do not contact around the pressure cell 2 with around the gravity box 1, left the liquid gap, the top of described pressure cell 2 evenly is densely covered with the second circular through hole 201, the top of described pressure cell 2 is provided with baffle plate 3, the both sides of described baffle plate 3 are fixed on the described gravity box 1, the top of gravity box 1 is covered, leave the gap between pressure cell 2 tops in the top of described baffle plate 3 and the gravity box 1, the edge of described baffle plate 3 is provided with orifice plate 302, orifice plate 302 is provided with cover plate 303,303 of orifice plate 302 and cover plates leave the gap and form air drain, described baffle plate 3 is provided with inlet tube 301, described inlet tube 301 and described pressure cell 2 internal communication.Wherein, the orifice plate 302 on gravity box 1 top is provided with evenly-distributed air holes, the preferred 0.01m of the circulation area of pore ²～0.3m ²In addition, preferred 15～150 of the quantity of second through hole 201 in the described pressure cell 2, the preferred 4mm～40mm in the aperture of described second through hole 201; Preferred 800～4000 of the quantity of first through hole 101 in the described gravity box 1, the preferred 2mm～10mm in the aperture of described first through hole 101; The height of the elongated dividing plate 102 of gravity box 1 bottom is preferably at 5 mm～50 mm.

The course of work of the present utility model is as follows: after the gas-liquid mixed refrigerant medium enters this distributor, be full of whole pressure cell 2, second through hole 201 that is provided with from pressure cell 2 tops evenly ejects then, guarantee that second through hole, 201 places spray the pressure drop that uniform method is the whole pressure cell 2 of control, and the pressure drop that guarantees actual pressure box 2 whether to equal the method for design pressure drop be to utilize fluid analysis software (CFD) simulation; After the gas-liquid mixed refrigerant medium evenly ejects from second through hole 201, impact on baffle plate 3, scatter around drop or the liquid stream, evenly fall after rise to gravity box 1 in the gap of liquid in the gas-liquid mixed refrigerant medium between pressure cell 2 and gravity box 1 sidewall, first through hole 101 by gravity box 1 bottom continuously flows on the heat exchanger tube of its below, gas in the gas-liquid mixed refrigerant medium flows out from the pore on the baffle plate 3 edge orifice plates 302 on gravity box 1 top, and then the outgassing groove that forms from the gap between orifice plate 302 and the cover plate 303 is discharged, sucked by compressor, gas coolant working medium is separated in gravity box 1 with liquid coolant working medium.

Claims (3)

1. distributor that is used for downward film evaporator, it comprises baffle plate (3), pressure cell (2) and gravity box (1), it is characterized in that: described gravity box (1) bottom evenly is densely covered with first through hole (101) and broad ways is provided with polylith dividing plate (102), pressure cell (2) is housed in the gravity box (1), leave the gap around the described pressure cell (2) with around the gravity box (1), the top of described pressure cell (2) evenly is densely covered with second through hole (201), the top of described pressure cell (2) is provided with baffle plate (3), the both sides of described baffle plate (3) are fixed on the described gravity box (1), the edge of described baffle plate (3) is provided with orifice plate (302), orifice plate (302) is provided with cover plate (303), leave the gap between orifice plate (302) and cover plate (303) and form air drain, described baffle plate (3) is provided with inlet tube (301), and described inlet tube (301) is communicated with described pressure cell (2).

2. a kind of distributor that is used for downward film evaporator according to claim 1 is characterized in that: the quantity of second through hole (201) in the described pressure cell (2) is: 15～150, the aperture of described second through hole (201) is: 4mm～40mm.

3. a kind of distributor that is used for downward film evaporator according to claim 1 is characterized in that: the quantity of first through hole (101) in the described gravity box (1) is: 800～4000, the aperture of described first through hole (101) is: 2mm～10mm.

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