CN103574955A - Falling film type screw water chilling unit realizing variable temperature difference through flow varying - Google Patents
Falling film type screw water chilling unit realizing variable temperature difference through flow varying Download PDFInfo
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- CN103574955A CN103574955A CN201310487133.1A CN201310487133A CN103574955A CN 103574955 A CN103574955 A CN 103574955A CN 201310487133 A CN201310487133 A CN 201310487133A CN 103574955 A CN103574955 A CN 103574955A
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Abstract
The invention discloses a falling film type screw water chilling unit which comprises a falling film evaporator, a screw compressor, a condenser, a dryer, an expansion valve, a liquid-liquid injector and a gas-liquid injector. The gas refrigerant outlet of the falling film evaporator is directly connected with the screw compressor through a refrigerant circulating pipeline; the oil outlet of the falling film evaporator is respectively connected with the gas suction pipeline of the screw compressor and the condenser through the gas-liquid injector; the liquid return opening of the falling film evaporator is connected with the liquid-liquid injector; the other two connectors of the liquid-liquid injector are respectively connected with the dryer and the liquid inlet of the evaporator; the dryer is also connected with the condenser; the outlet of the screw compressor is connected with the condenser; and both the falling film evaporator and the condenser are provided with channels for charging and discharging water, and can realize flow varying according to temperature difference. The falling film type screw water chilling unit has the advantages that the heat exchange performance is high, the applicable temperature difference range is wide, the refrigerant charging amount is small, and the oil return performance is good.
Description
Technical field
The present invention relates to a kind of air-conditioning equipment, especially a kind of falling film type screw rod handpiece Water Chilling Units, specifically a kind of falling film type screw rod handpiece Water Chilling Units that realizes temp .-differential by variable flow.
Background technology
Country, for to realize energy-saving and cost-reducing target, has announced a series of product Energy efficiency evaluation standard, comprising the Energy efficiency evaluation standard of handpiece Water Chilling Units.At present, increasing enterprise manufactures and designs the falling film type handpiece Water Chilling Units of high energy efficiency, but common falling film type handpiece Water Chilling Units has the shortcoming of applicable temperature difference narrow range, does not meet or limited the demand of client's the flow that has a narrow range of temperature greatly.Therefore developed falling film type screw rod handpiece Water Chilling Units of new generation, by variable flow, realize temp .-differential, by falling film evaporator, realizing high efficient heat exchanging and cold-producing medium fills less, it not only has advantages of that high energy efficiency, the oil return of common falling film type screw rod handpiece Water Chilling Units is effective and refrigerant charge is few, but also have advantages of chilled water and cooling range applied widely.
Aspect Falling film heat transfer device structural design optimization, there have been a large amount of documents and Patent data research at present and designed novel refrigerant distributor.(US629311B1 has proposed a kind of refrigerant distributor to the patent of U.S. Trane air-conditioning company, this distributor forms by five layers altogether, when cold-producing medium flows from top to bottom, and first cloth liquid along its length, by width cloth liquid, finally realize the even cloth liquid of cold-producing medium again.The said firm another patent (CN1343295A) has proposed a kind of liquid distributor being comprised of four layers of orifice plate, and (US629311B1) is similar for design concept and patent.The dispensing arrangement of these two kinds of forms is complicated, and especially manufacturing cost is very high.
York state company patent (CN10105285A) has designed a kind of ejector type refrigeration distributor, and this dispensing arrangement is simple, but is difficult to realize the even cloth liquid of cold-producing medium.
The distributor of Shanghai Communications University's patent (CN100451495A) design is divided into three grades, higher level is comprised of the longitudinal distributing pipe of cold-producing medium and horizontal capillary, middle rank is comprised of porous plate, and subordinate consists of water conservancy diversion silk screen, but is difficult to guarantee cold-producing medium distributed uniform degree when unit is installed.
The general refrigeration company of Chongqing U.S. has designed a kind of downward film evaporator (CN202133192U), the liquid distributor of this evaporimeter is comprised of inclined-plane distributing pore plate, porous aggregate layer, primary distribution orifice plate and secondary distribution orifice plate, structure is more complicated still, can not reduce costs.
Gree power-saving technology center, Zhuhai patent (CN102410773A) has designed a kind of liquid distributor, cold-producing medium flows into shunting pond from this device feed tube, mozzle through shunting pond enters into porous liquid distributor, then from liquid distributor aperture, splash into packing groove, finally from the bottom liquid distributing hole of packing groove, evenly flow out, this device difficulty of processing is larger, and is difficult to guarantee cold-producing medium distributed uniform degree when unit is installed.
Guangdong University of Technology's patent (CN102000437A) discloses a kind of falling film evaporator with gas-liquid separation cloth film, comprises the filming device of minimum two-layer separatory function, and in the middle of two-layer filming device, has also arranged pipe row, complex structure, and difficulty of processing is large.
Shanghai Maritime University's patent (CN101191683B) has been authorized a kind of jet flow circulated sprinkling falling-film evaporator, the entrance of the high-pressure refrigerant of the jet pump of this evaporimeter is communicated with condenser, circulation liquid refrigerant inlet is communicated with evaporator shell bottom, mix refrigerant outlet is connected with distributor, but determine the concrete link position of introducing high-pressure fluid, likely can cause the inner obstruction of jet pump.
Shanghai Ke Mao Machinery Co., Ltd. patent (CN102338512A) has also related to a kind of falling film evaporator with injector, between this evaporimeter low side and side side, connect an injector, but determine the concrete link position of introducing high-pressure fluid, likely can cause the inner obstruction of jet pump.
American Standard Inc.'s patent (CN1409810A) has been authorized a kind of downward film evaporator for vapor compression refrigerator, has mainly told about comb and the exhaust passage of evaporimeter distributor and tube sheet, but does not relate to the conversion of evaporimeter variable flow.
Guangdong University of Technology's patent (CN201983533U) has been authorized a kind of gas-liquid separation type falling film evaporator, has mainly told about distributor and has comprised the minimum two-layer filming device with vapor-liquid separation function, but do not had deeply to relate to aspect tube sheet and tube bank.
Summary of the invention
The object of the invention is the deficiency existing for prior art, a kind of falling film type screw rod handpiece Water Chilling Units is provided, it is high that this unit has heat exchange property, and evaporimeter heat exchange area is few, and applicable temperature range is wide, and coolant injection amount is few, the advantage that oil return performance is good.
For achieving the above object, the technical solution used in the present invention is: a kind of falling film type screw rod handpiece Water Chilling Units, comprises falling film evaporator, helical-lobe compressor, condenser, drier, expansion valve, liquid liquid injector and gas-liquid injector.The gas refrigerant outlet of described falling film evaporator is by the direct connecting screw rod compressor of medium circulation pipeline, and its oil return opening is by aspirating air pipe and the condenser of gas-liquid injector difference connecting screw rod compressor, and its liquid return hole and liquid liquid injector join; Another two ports of this liquid liquid injector connect respectively the inlet of drier and evaporimeter; Described drier is also connected with condenser; The outlet of described helical-lobe compressor is connected with condenser; Described falling film evaporator and condenser are equipped with the bobbin carriage of Inlet and outlet water, can, according to warm extent, realize variable flow.
Described falling film evaporator comprises the first housing, and its inside is from top to bottom aligned in sequence with one-level distributor, secondary splitter and heat-exchanging tube bundle; The two ends of this first housing are respectively equipped with the first tube sheet and the 3rd tube sheet; On described the first tube sheet and the 3rd tube sheet, be equipped with a plurality of the first pores; This first pore is with equilateral triangle or turn 30 degree equilateral triangles or form that both are comprehensive is arranged, and leaves therebetween for the first flow of exhaust passage and assembling muscle is set; Described heat-exchanging tube bundle is connected between described the first pore; The outside of described the first tube sheet and the 3rd tube sheet is complete is provided with the first bobbin carriage and the second bobbin carriage or the 3rd bobbin carriage and the 4th bobbin carriage; Described the first hull outside is provided with the liquid refrigerant inlet joining with one-level distributor and the gas refrigerant outlet of joining with helical-lobe compressor.
Described the first bobbin carriage comprises the first water pipe, the second water pipe, the 3rd water pipe, the first muscle and the second muscle and the first casing, and wherein the first water pipe is identical with the second water pipe caliber and be all less than the 3rd water pipe caliber; The first water pipe and the second water pipe walk abreast layout while and the 3rd water pipe up and down or lower upper layout; All water pipes are all from inside to outside through the first casing; The first muscle and the second muscle size and dimension are as the criterion not hinder pipe row and water pipe to arrange, both are arranged in the first box inside in vertical state; Described the second bobbin carriage comprises the 3rd muscle and the second casing, and wherein the 3rd muscle size and dimension is as the criterion not hinder pipe row and water pipe to arrange, and is vertical state arrangement at the second box inside.
Described the 3rd bobbin carriage comprises the 4th water pipe, the 4th muscle and the 3rd casing, and wherein the 4th water pipe is from inside to outside through the 3rd casing, and the 4th muscle size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout; Described the 4th bobbin carriage comprises the 5th water pipe, the 5th muscle and the 4th casing, wherein the 5th water pipe is from inside to outside through the 4th casing, and be up and down or lower upper layout with the 5th water pipe, the 5th muscle size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout.
Described condenser comprises the second housing and is located at its inner heat-exchanging tube bundle and built-in oil content; Described built-in oil content, for tilting or smooth vertical and horizontal device, is arranged on heat-exchanging tube bundle, and and heat-exchanging tube bundle between have certain intervals; Described the second housing two ends are separately installed with the second tube sheet and the 4th tube sheet; Described the second tube sheet and the 4th tube sheet are provided with a plurality of the second pores; Described the second pore is with equilateral triangle or turn 30 degree equilateral triangles or form that both are comprehensive is arranged, between leave for the second runner of exhaust passage and assembling muscle is set; Described heat-exchanging tube bundle is connected between described the second pore; Described the second tube sheet and the 4th tube sheet outside are provided with the 5th bobbin carriage and the 6th bobbin carriage or the 7th bobbin carriage and the 8th bobbin carriage in pairs; Top outside described the second housing is provided with the gaseous refrigerant air inlet joining with built-in oil content and helical-lobe compressor, and bottom is provided with liquid refrigerant outlet.
Described the 5th bobbin carriage comprises the 6th water pipe, the 7th water pipe, the 8th water pipe, the 6th muscle, the 7th muscle and the 8th muscle and the 5th casing, wherein the 6th water pipe is identical with the 7th water pipe caliber and be all less than the 8th water pipe caliber, the 6th water pipe and the 8th water pipe walk abreast layout while and the 7th water pipe up and down or lower upper layout, all water pipes are from inside to outside through the 5th casing, the 6th muscle, the 7th muscle and the 8th muscle size and dimension are as the criterion not hinder pipe row and water pipe to arrange, the 6th muscle and the 7th muscle are arranged in the 5th box inside after combination in vertical state, the 8th muscle is the level of state and is arranged in the 5th box inside, described the 6th bobbin carriage comprises the 9th muscle and the 6th casing, and wherein the 9th muscle size and dimension is as the criterion not hinder pipe row and water pipe to arrange, and is the straight state arrangement of level at the 6th box inside.
Described the 7th bobbin carriage comprises the 9th water pipe, the tenth muscle and the 7th casing, and wherein the 9th water pipe is from inside to outside through the 7th casing, and the tenth muscle size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout; Described the 8th bobbin carriage comprises the tenth water pipe, the 11 muscle and the 8th casing, wherein the tenth water pipe is from inside to outside through the 8th casing, and be up and down or lower upper layout with the 9th water pipe, the tenth muscle size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout.
Described liquid return hole is positioned at falling film evaporator bottom, and is connected with the import of liquid liquid injector by the 4th magnetic valve; Between described inlet and liquid liquid injector, be provided with the 5th ball valve and the second liquid-sighting glass; Between described drier and liquid liquid injector, be provided with the 3rd magnetic valve and the 7th ball valve.
Described oil return opening is positioned at the sidepiece of falling film evaporator, and is connected with the import of gas-liquid injector with the second ball valve by the first magnetic valve; Between described condenser and gas-liquid injector, be provided with the second magnetic valve; Between described gas-liquid injector and helical-lobe compressor, be provided with the first ball valve and the first liquid-sighting glass.
Refrigeration principle of the present invention is: the high-pressure refrigerant flowing out from compressor outlet, enter condenser, high-pressure refrigerant after cooling condensation is after drier, be divided into two-way, one tunnel enters expansion valve, injector high pressure entry is sent on another road, injector aspirates the low pressure liquid refrigerant of falling film evaporator bottom by highly pressurised liquid, low pressure refrigerant Bing Wei mono-tunnel of the low pressure refrigerant after expansion valve throttling and injector mixed export, then enter the liquid refrigerant inlet of downward film evaporator, outside the tube bank of low pressure refrigerant in downward film evaporator evaporation and overheated after, from the gas refrigerant outlet on downward film evaporator top, flow out, finally get back to the entrance of helical-lobe compressor, complete a kind of refrigeration cycle.
Patent of invention (CN10105285A) before being different from, (US629311B1), (CN1343295A),
(CN10105285A), (CN100451495A), (CN202133192U), (CN102410773A), (CN102000437A), (CN1409810A), (CN201983533U) part are, this patent is having further investigated aspect tube sheet, bobbin carriage, tube bank and the mouth of a river, can carry out the conversion of chilled water and cooling water 2,3,4 flow processs; Than patent of invention (US629311B1), (CN1343295A), other differences are that its distributor divides four layers to cause above complex structure, and that this patent distributor only has is two-layer, manufacture simpler; Than patent of invention (CN100451495A), (CN202133192U), other differences are, this patent distributor is comprised of two-stage, without establishing water conservancy diversion silk screen, inclined-plane distributing pore plate and porous aggregate layer; Than patent of invention (CN102000437A), other differences are, this patent dispensing arrangement principle is completely different with it, without establishing filming device and adding tube row; Than patent of invention (CN101191683B) and (CN102338512A), this patent jet pump high pressure entry is connected near dryer export.Therefore this patent is by the design research and development theory of different previous patents, by using Falling Film Evaporator of Horizontal Tube and injection to return liquid, oil return technology, developed falling film type screw rod handpiece Water Chilling Units, not only retain the advantage of full-liquid type handpiece Water Chilling Units but also overcome its shortcoming, reached the consumable good result of joint.
Beneficial effect of the present invention:
1) the present invention makes full use of the advantages such as the heat transfer efficiency of falling film type evaporation is high, refrigerant charge is few, by being applied in handpiece Water Chilling Units of falling film type evaporation technology.
2) the present invention makes full use of the feature that variable flow can be realized temp .-differential, by tube sheet and bobbin carriage special facture and cooperation, flow process conversion is applied in the middle of handpiece Water Chilling Units falling film evaporator, and by flow process, convert to realize the conversion of discharge and water temperature difference, thereby reach the object that unit is applicable to the large temperature range of chilled water.
3) the present invention makes full use of the feature that variable flow can be realized temp .-differential, by tube sheet and bobbin carriage special facture and cooperation, flow process conversion is applied in the middle of handpiece Water Chilling Units condenser, and by flow process, convert to realize the conversion of discharge and water temperature difference, thereby reach the object that unit is applicable to the large temperature range of cooling water.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention.
Fig. 2 is the falling film evaporator structural representation that the present invention is furnished with the 3rd bobbin carriage and the 4th bobbin carriage.
Fig. 3 is the axial symmetry generalized section of the present invention's falling film evaporator.
Fig. 4 is the first channel structure schematic diagram of the present invention's falling film evaporator.
Fig. 5 is the second channel structure schematic diagram of the present invention's falling film evaporator.
Fig. 6 is the 3rd channel structure schematic diagram of the present invention's falling film evaporator.
Fig. 7 is the 4th channel structure schematic diagram of the present invention's falling film evaporator.
Fig. 8 is the structural representation that the present invention is furnished with the condenser of the 5th bobbin carriage and the 6th bobbin carriage.
Fig. 9 is the axial symmetry generalized section of the present invention's condenser.
Figure 10 is the 5th channel structure schematic diagram of the present invention's condenser.
Figure 11 is the 6th channel structure schematic diagram of the present invention's condenser.
Figure 12 is the 7th channel structure schematic diagram of the present invention's condenser.
Figure 13 is the 8th channel structure schematic diagram of the present invention's condenser.
Figure 14 is the structure chart of the present invention's falling film evaporator while being furnished with the first bobbin carriage and the second bobbin carriage.
Figure 15 is the structural representation of the present invention's condenser while being furnished with the 7th bobbin carriage and the 8th bobbin carriage.
Figure 16 is the first tube plate structure schematic diagram of falling film evaporator of the present invention.
Figure 17 is the 3rd tube plate structure schematic diagram of falling film evaporator of the present invention.
Figure 18 is the second tube plate structure schematic diagram of condenser of the present invention.
Figure 19 is the 4th tube plate structure schematic diagram of condenser of the present invention.
Wherein: 1-falling film evaporator; 2-helical-lobe compressor; 3-the first ball valve; 4-the first liquid-sighting glass; 5-gas-liquid is hinted obliquely at device; 6-the first magnetic valve; 7-the second ball valve; 8-the 5th ball valve; 9-the second liquid-sighting glass; 10-the second magnetic valve; 11-condenser; 12-the 6th ball valve; 13-drier; 14-the 7th ball valve; 15-the 3rd magnetic valve; 16-expansion valve; 17-the 4th ball valve; 18-the 4th magnetic valve; 19-the 3rd ball valve; 20-liquid liquid injector; 21-cold-producing medium inlet; The outlet of 22-gas refrigerant; 23-the first housing; 24-one-level distributor; 25-secondary splitter; 26-liquid storage bag; 27-the first tube sheet; 28-the first bobbin carriage; 29-the 3rd water pipe; 30-the second water pipe; 31-the first muscle; 32-the first water pipe; 33-the second muscle; 34-the second bobbin carriage; 35-the 3rd muscle; 36-the 4th water pipe; 37-the 3rd bobbin carriage; 38-the 4th muscle; 39-the 4th bobbin carriage; 40-the 5th muscle; 41-the 5th water pipe; 42-the first pore; 43-first flow; 44-the first casing; 45-the 3rd casing; 46-the 4th casing; 47-the second casing; 48-the second housing; 49-the 6th bobbin carriage; The built-in oil content of 50-; 51-liquid refrigerant outlet; 52-the 5th bobbin carriage; The import of 53-gaseous refrigerant; 54-the second pore; 55-the second runner; 56-the second tube sheet; 57-the 7th water pipe; 58-the 8th water pipe; 59-the 5th casing; 60-the 6th water pipe; 61-the 6th muscle; 62-the 8th muscle; 63-the 7th muscle; 64-the 6th casing; 65-the 9th muscle; 66-the 7th bobbin carriage; 67-the 9th water pipe; 68-the tenth muscle; 69-the 7th casing; 70-the 8th bobbin carriage; 71-the 8th casing; 72-the 11 muscle; 73-the tenth water pipe; 74-the 4th tube sheet; 75-the 3rd tube sheet.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention.The present embodiment is implemented take technical solution of the present invention under prerequisite, should understand these embodiment and only for the present invention is described, is not used in and limits the scope of the invention.
As shown in Figure 1, the present invention includes falling film evaporator 1, helical-lobe compressor 2, condenser 11, drier 13, expansion valve 16, liquid liquid injector 20 and gas-liquid injector 5; The porch of helical-lobe compressor 2 adopts falling film evaporator 1.The interior installation coolant distributor of falling film evaporator 1, two ends are respectively equipped with the first tube sheet and the 3rd tube sheet, and according to the difference of the temperature difference, in tube sheet outside, connect different bobbin carriages: if need the little temperature difference within 5-8 ℃ of scope, need large discharge, can adopt the arrangement of two flow processs to realize, be that falling film evaporator 1 connects the first bobbin carriage 28 and the second bobbin carriage 34, as Figure 14, wherein the first water pipe 32, the second water pipe 30 and the 3rd water pipe 29 standard-sized sheets, and the first water pipe 32, the second water pipe 30 water inlets, the 3rd water pipe 29 water outlets; If need the slightly large temperature difference within 9-13 ℃ of scope, need less discharge, can adopt the arrangement of three flow process to realize, be that falling film evaporator 1 connects the 3rd bobbin carriage 37 and the 4th bobbin carriage 39, as Fig. 2, wherein the 4th water pipe 36, the 5th water pipe 41 standard-sized sheets, a water pipe water inlet, a water pipe water outlet; If need the large temperature difference within 14-20 ℃ of scope, need low discharge, can adopt the arrangement of four flow processs to realize, be that falling film evaporator 11 connects the first bobbin carriage 28 and the second bobbin carriage 34, as Figure 14, wherein the 3rd water pipe 29 is closed, the first water pipe 32 and the second water pipe 30 standard-sized sheets, a water pipe water inlet, a water pipe water outlet.In the structure of above-mentioned each flow process, two related equal capable of interchanging positions of bobbin carriage.Falling film evaporator 1 passes through two pipeline connecting screw rod compressors 2, the direct connecting screw rod compressor 2 of main medium circulation pipeline, and another auxiliary return line is by the aspirating air pipe of gas-liquid injector 5 connecting screw rod compressors 2, and gas-liquid injector 5 is connected with condenser 11.The two ends of related condenser 11 are separately installed with the second tube sheet and the 4th tube sheet, and different according to the temperature difference, in tube sheet outside, connect different bobbin carriages: if need the little temperature difference within 5-8 ℃ of scope, need flood flow, can adopt the arrangement of two flow processs to realize, condenser 11 connects the 5th bobbin carriage 52 and the 6th bobbin carriage 49, as Fig. 8, wherein the 6th water pipe 60, the 7th water pipe 57 and the 8th water pipe 58 standard-sized sheets, and the 6th water pipe 60, the 7th water pipe 57 water inlets, the 8th water pipe 58 water outlets; The slightly large temperature difference when needing within 9-13 ℃ of scope, needs slightly weep amount, and arrangement that can three flow process is realized, condenser 11 connects the 7th bobbin carriage 66 and the 8th bobbin carriages 70, as Figure 15, and wherein the 9th water pipe 67, the tenth water pipe 73 standard-sized sheets, a water pipe water inlet, a water pipe water outlet; If need the large temperature difference within 14-20 ℃ of scope, need little discharge, can adopt the arrangement of four flow processs to realize, falling film evaporator 1 connects the 5th bobbin carriage 52 and the 6th bobbin carriage 49, as Fig. 8; Wherein the 8th water pipe 58 is closed, the 6th water pipe 60 and the 7th water pipe 57 standard-sized sheets, a water pipe water inlet, a water pipe water outlet.In the structure of above-mentioned each flow process, two related equal capable of interchanging positions of bobbin carriage.The liquid return hole of falling film evaporator 1 and liquid liquid injector 20 join, and liquid liquid injector 20 is connected between drier 13 and expansion valve 16, and drier 13 is also connected with condenser 11, and the outlet of helical-lobe compressor 2 is connected with condenser 11.
As shown in Figure 2, falling film evaporator 1 comprises the first housing 23, gas refrigerant outlet 22, cold-producing medium inlet 21, liquid storage bag 26, secondary splitter 25, one-level distributor 24, heat-exchanging tube bundle, the first tube sheet 27, the 3rd tube sheet 75, the first bobbin carriage 28 and the second bobbin carriage 34 and standby the 3rd bobbin carriage 37 and the 4th bobbin carriage 39 etc.Wherein liquid refrigerant liquid return hole is positioned at a side of liquid storage bag 26, and liquid storage bag 26 is arranged on the bottom of falling film evaporator 1.
As shown in Fig. 3, Figure 16, Figure 17, between the first tube sheet 27 and the first pore 42 of the 3rd tube sheet 75, leave the runner of certain exhaust passage and assembling muscle, the first pore 42 is for equilateral triangle or turn 30 arrangement of degree equilateral triangles or both comprehensive forms.
The first bobbin carriage 28 is comprised of the first water pipe 32, the second water pipe 30, the 3rd water pipe 29, the first muscle 31 and the second muscle 33 and the first casing 44 etc., as shown in Figure 4; The second bobbin carriage 34 is comprised of the 3rd muscle 35 and the second casing 47, and as shown in Figure 5, the 3rd bobbin carriage 37 is comprised of the 4th water pipe 36, the 4th muscle 38 and the 3rd casing 45, as shown in Figure 6; The 4th bobbin carriage 39 is comprised of the 5th water pipe 41, the 5th muscle 40 and the 4th casing 46, as shown in Figure 7.
As shown in Fig. 8, Figure 18, Figure 19, condenser 11 comprises the second housing 48, the second tube sheet 56, the 4th tube sheet 74, the 5th bobbin carriage 52 and the 6th bobbin carriage 49 and standby the 7th bobbin carriage 66 and the 8th bobbin carriage 70 etc., in enclosure interior, is from top to bottom aligned in sequence with built-in oil content 50 and heat-exchanging tube bundle; Outside housing, top is provided with the gaseous refrigerant air inlet 53 joining with built-in oil content 50 and helical-lobe compressor 2, and bottom is provided with liquid refrigerant outlet 51.
As shown in Figure 9, leave the runner of certain exhaust passage and assembling muscle between the second tube sheet 56 and the second pore 54 of the 4th tube sheet 74, the second pore 54 is with equilateral triangle or turn 30 degree equilateral triangles or form that both are comprehensive is arranged.
The 5th bobbin carriage 52 is comprised of the 6th water pipe 60, the 7th water pipe 57, the 8th water pipe 58, the 6th muscle 61, the 7th muscle 63 and the 8th muscle 62 and the 5th casing 59, as shown in figure 10; The 6th bobbin carriage 49 is comprised of the 9th muscle 65 and the 6th casing 64, as shown in figure 11; The 7th bobbin carriage 66 is comprised of the 9th water pipe 67, the tenth muscle 68 and the 7th casing 69, as shown in figure 12; The 8th bobbin carriage 70 is comprised of the tenth water pipe the 73, the 11 muscle 72 and the 8th casing 71, as shown in figure 13; The first tube sheet 27 is comprised of as shown in figure 16 the first pore 42 and other pores; The 3rd tube sheet 75 is comprised of as shown in figure 17 the first pore 42 and other pores; The second tube sheet 56 is comprised of as shown in figure 18 the second pore 54 and other pores; The 4th tube sheet 74 is comprised of as shown in figure 19 the second pore 54 and other pores.
Operation principle of the present invention:
This device refrigeration mode is as shown in Figure 1: the high-pressure refrigerant flowing out from helical-lobe compressor 2 outlets enters condenser 11, condenser two outlets in 11 minutes, and the high-pressure refrigerant in the first exit enters the high pressure entry of gas-liquid injector 5 through the second magnetic valve 10.The effect of entrainmenting due to gas-liquid injector 5 inner high voltage liquid, low pressure lubricating oil in falling film evaporator 1 first housing 23 constantly enters the injection entrance of gas-liquid injector 5 through the second ball valve 7 and the first magnetic valve 6, the low pressure refrigerant of gas-liquid injector 5 mixed exports, through the first liquid-sighting glass 4 and the first ball valve 3, is got back to helical-lobe compressor 2, the high-pressure refrigerant in the second exit is through the 6th ball valve 12, enter after drier 13, be divided into two-way, one tunnel enters the 4th ball valve 17 after being inflated valve 16 throttlings, another road is after the 7th ball valve 14 and the 3rd magnetic valve 15, send into the high pressure entry of liquid liquid injector 20, the effect of entrainmenting due to liquid liquid injector 20 inner high voltage liquid, the low pressure refrigerant of falling film evaporator 1 bottom constantly passes through liquid storage bag 26, the 3rd ball valve 19 and the 4th magnetic valve 18 enter the injection entrance of liquid liquid injector 20, the low pressure refrigerant of liquid liquid injector 20 mixed exports is merged into behind a road through the low pressure refrigerant in the second liquid-sighting glass 9 and the 5th ball valve 8 and the 4th ball valve 17 exits, send into the cold-producing medium inlet 21 of falling film evaporator 1, enter one-level distributor 24 and complete just substandard cloth liquid, then under Action of Gravity Field, low-pressure, liquid refrigerant is after secondary splitter 25 completes the even cloth liquid of secondary, drip and drench on the heat-exchanging tube bundle of falling film evaporator 1, vaporization and overheated after refrigerant vapour through gas refrigerant outlet 22, get back to the entrance of helical-lobe compressor 2, complete a kind of refrigeration cycle.
The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.
Claims (9)
1. a falling liquid film bolt cold water unit, comprise falling film evaporator (1), helical-lobe compressor (2), condenser (11), drier (13), expansion valve (16), liquid liquid injector (20) and gas-liquid injector (5), it is characterized in that the gas refrigerant outlet of described falling film evaporator (1) is by the direct connecting screw rod compressor of medium circulation pipeline (2), its oil return opening is by aspirating air pipe and the condenser (11) of gas-liquid injector (5) difference connecting screw rod compressor (2), and its liquid return hole and liquid liquid injector (20) join; Another two ports of this liquid liquid injector (20) connect respectively the inlet of drier (13) and evaporimeter; Described drier (13) is also connected with condenser (11); The outlet of described helical-lobe compressor (2) is connected with condenser (11); Described falling film evaporator (1) and condenser (11) are equipped with the bobbin carriage of Inlet and outlet water, can, according to warm extent, realize variable flow.
2. falling film type screw rod handpiece Water Chilling Units according to claim 1, is characterized in that described falling film evaporator (1) comprises the first housing (23), and its inside is from top to bottom aligned in sequence with one-level distributor (24), secondary splitter (25) and heat-exchanging tube bundle; The two ends of this first housing are respectively equipped with the first tube sheet (27) and the 3rd tube sheet (75); On described the first tube sheet (27) and the 3rd tube sheet (75), be equipped with a plurality of the first pores (42); This first pore (42) is with equilateral triangle or turn 30 degree equilateral triangles or form that both are comprehensive is arranged, and leaves therebetween for the first flow (43) of exhaust passage and assembling muscle is set; Described heat-exchanging tube bundle is connected between described the first pore; The outside of described the first tube sheet (27) and the 3rd tube sheet (75) is complete is provided with the first bobbin carriage (28) and the second bobbin carriage (34) or the 3rd bobbin carriage (37) and the 4th bobbin carriage (39); Described the first housing (23) outside is provided with the liquid refrigerant inlet (21) joining with one-level distributor (24) and the gas refrigerant outlet (22) of joining with helical-lobe compressor (2).
3. according to falling film type screw rod handpiece Water Chilling Units described in claim 2, it is characterized in that described the first bobbin carriage (28) comprises the first water pipe (32), the second water pipe (30), the 3rd water pipe (29), the first muscle (31) and the second muscle (33) and the first casing (44), wherein the first water pipe (32) is identical with the second water pipe (30) caliber and be all less than the 3rd water pipe (29) caliber; The first water pipe (32) and the second water pipe (30) walk abreast layout while and the 3rd water pipe (29) up and down or lower upper layout; All water pipes are all from inside to outside through the first casing (44); The first muscle (31) and the second muscle (33) size and dimension are as the criterion not hinder pipe row and water pipe to arrange, both are arranged in the first casing (44) inner side in vertical state; Described the second bobbin carriage (34) comprises the 3rd muscle (35) and the second casing (47), and wherein the 3rd muscle (35) size and dimension is as the criterion not hinder pipe row and water pipe to arrange, and is vertical state arrangement in the second casing (47) inner side.
4. according to falling film type screw rod handpiece Water Chilling Units described in claim 2, it is characterized in that described the 3rd bobbin carriage (37) comprises the 4th water pipe (36), the 4th muscle (38) and the 3rd casing (45), wherein the 4th water pipe (36) is from inside to outside through the 3rd casing (45), the 4th muscle (38) size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout; Described the 4th bobbin carriage (39) comprises the 5th water pipe (41), the 5th muscle (40) and the 4th casing (46), wherein the 5th water pipe (41) is from inside to outside through the 4th casing (46), and be up and down or lower upper layout with the 5th water pipe (41), the 5th muscle (40) size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout.
5. falling film type screw rod handpiece Water Chilling Units according to claim 1, is characterized in that described condenser (11) comprises the second housing (48) and is located at its inner heat-exchanging tube bundle and built-in oil content; Described built-in oil content (50), for tilting or smooth vertical and horizontal device, is arranged on heat-exchanging tube bundle, and and heat-exchanging tube bundle between have certain intervals; Described the second housing (48) two ends are separately installed with the second tube sheet (56) and the 4th tube sheet (74); Described the second tube sheet and the 4th tube sheet (74) are provided with a plurality of the second pores; Described the second pore (54) is with equilateral triangle or turn 30 degree equilateral triangles or form that both are comprehensive is arranged, between leave for the second runner of exhaust passage and assembling muscle is set; Described heat-exchanging tube bundle is connected between described the second pore; Described the second tube sheet and the 4th tube sheet (75) outside are provided with the 5th bobbin carriage (52) and the 6th bobbin carriage (49) or the 7th bobbin carriage (66) and the 8th bobbin carriage (70) in pairs; The outer top of described the second housing (48) is provided with the gaseous refrigerant air inlet (53) joining with built-in oil content (50) and helical-lobe compressor (2), and bottom is provided with liquid refrigerant outlet (51).
6. according to falling film type screw rod handpiece Water Chilling Units described in claim 5, it is characterized in that described the 5th bobbin carriage (52) comprises the 6th water pipe (60), the 7th water pipe (57), the 8th water pipe (58), the 6th muscle (61), the 7th muscle (63) and the 8th muscle (62) and the 5th casing (59), wherein the 6th water pipe (60) is identical with the 7th water pipe (57) caliber and be all less than the 8th water pipe (58) caliber, the 6th water pipe (60) and the 8th water pipe (58) walk abreast layout while and the 7th water pipe (57) up and down or lower upper layout, all water pipes are from inside to outside through the 5th casing (59), the 6th muscle (61), the 7th muscle (63) and the 8th muscle (62) size and dimension are as the criterion not hinder pipe row and water pipe to arrange, after the combination in vertical state of the 6th muscle (61) and the 7th muscle (63), be arranged in the 5th casing (59) inner side, the 8th muscle (62) is the level of state and is arranged in the 5th casing (59) inner side, described the 6th bobbin carriage (49) comprises the 9th muscle (65) and the 6th casing (64), and wherein the 9th muscle (65) size and dimension is as the criterion not hinder pipe row and water pipe to arrange, and is the straight state arrangement of level in the 6th casing (64) inner side.
7. according to falling film type screw rod handpiece Water Chilling Units described in claim 5, it is characterized in that described the 7th bobbin carriage (66) comprises the 9th water pipe (67), the tenth muscle (68) and the 7th casing (69), wherein the 9th water pipe (67) is from inside to outside through the 7th casing (69), the tenth muscle (68) size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout; Described the 8th bobbin carriage (70) comprises the tenth water pipe (73), the 11 muscle (72) and the 8th casing (71), wherein the tenth water pipe (73) is from inside to outside through the 8th casing (71), and be up and down or lower upper layout with the 9th water pipe (67), the tenth muscle (68) size and dimension is as the criterion not hinder pipe row and water pipe to arrange, in the horizontal direction inclined layout.
8. according to falling film type screw rod handpiece Water Chilling Units described in claim 1 or 2, it is characterized in that described liquid return hole is positioned at falling film evaporator (1) bottom, and be connected with liquid liquid injector (20) import by the 4th magnetic valve (18); Between described inlet (21) and liquid liquid injector (20), be provided with the 5th ball valve (8) and the second liquid-sighting glass (9); Between described drier (13) and liquid liquid injector (20), be provided with the 3rd magnetic valve (15) and the 7th ball valve (14).
9. according to falling film type screw rod handpiece Water Chilling Units described in claim 1, it is characterized in that described oil return opening is positioned at the sidepiece of falling film evaporator (1), and be connected with gas-liquid injector (5) import with the second ball valve (7) by the first magnetic valve (6); Between described condenser (11) and gas-liquid injector (5), be provided with the second magnetic valve (10); Between described gas-liquid injector (5) and helical-lobe compressor (2), be provided with the first ball valve (3) and the first liquid-sighting glass (4).
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| CN201310487133.1A CN103574955B (en) | 2013-10-17 | 2013-10-17 | A kind of falling film type screw rod handpiece Water Chilling Units being realized temp .-differential by variable flow |
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|---|---|
| CN103574955B (en) | 2016-04-20 |
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