CN1197914A - Evaporator - Google Patents

Abstract

The object of the invnetion is to achieve a higher evaporation efficiency of an evaporator. In order to achieve the object of the invention, which the measures comprise: water is forced out from a plurality of scattering holes 44a to be scattered almost evenly on the entire upper circumference of a chilled water tube 41. The scattered water flows downward while a part thereof is guided spirally by a coil 48. In this process, under a convection, the water as a whole contacts the chilled water tube 41, improving a heat transfer performance. Thus, the water flows totally over the entire external surface of the chilled water tube 41 and moreover, expands near it with a grooved pipe, thereby allowing evaporation of water over the entire area of the external surface.

Description

Evaporimeter

The present invention is about a kind of evaporimeter, this evaporimeter, and it is configured to liquid coolant is dispersed in the structure of the outer surface of the cylinder that vertically is provided with.

In the past, known have liquid coolant is dispersed in vertically on the outside of the pipe that is provided with, make the liquid coolant evaporation, cool off the evaporimeter of the structure of flowing liquid in pipe.This kind structure is for the size of evaporimeter, because can enlarge the disengagement area of liquid coolant, so can make the evaporimeter simplicity.

Yet liquid refrigerant within can not be dispersed on whole outer surfaces of pipe, and concentrates under the situation of part distribution, can not effectively utilize disengagement area, thereby can not obtain sufficient performance.For anti-situation here, known have by the structure that liquid coolant is injected on the tube outside, yet, for the ejecting force that obtains to spray, pump etc. must be installed, structure becomes complicated, and the problem that machine maximizes or cost increases that makes is arranged.

Again, be provided with by managing vertically, the liquid coolant that is dispersed on the tube outside can vertically down flow down, because the time of falling is short, so liquid coolant can't fully evaporate, and the not good situation that can't obtain sufficient performance is arranged.Therefore, though known have use to form the structure of the rill pipe of the ditch of direction in length and breadth on whole outer surfaces of pipe, yet liquid coolant only extend to the part that flows near, so can not obtain effect of sufficient.

The object of the present invention is to provide a kind of evaporimeter, can solve above-mentioned problem, improve the evaporation efficiency of evaporimeter.

In order to solve above-mentioned problem, the evaporimeter of the present invention's record is arranged in the absorption air-conditioner, be that liquid coolant is dispersed on the outside of the cylinder that vertically is provided with, make the liquid coolant evaporation, cool off the evaporimeter of flowing liquid in this cylinder, it is characterized by:

To be wound into spiral helicine coil, be installed on the above-mentioned cylinder outside.

In order to solve above-mentioned problem, the evaporimeter that the present invention put down in writing is arranged in the absorption air-conditioner, be that liquid coolant is dispersed on the outside of the cylinder that vertically is provided with, make the liquid coolant evaporation, cool off the evaporimeter of flowing liquid in this cylinder, it is characterized by:

On the upper periphery of above-mentioned cylinder, possesses the device that accumulates that accumulates the aforesaid liquid refrigerant;

The above-mentioned device that accumulates possesses most dispense orifice that are provided with equably along above-mentioned cylinder periphery on its bottom surface.

Evaporimeter of the present invention with above-mentioned structure is dispersed in liquid coolant on the outside of the cylinder that vertically is provided with, and makes the liquid coolant evaporation, cools off flowing liquid in this cylinder.Owing to, install and be wound into spiral helicine coil in this cylinder outside, can be along coil and helically falls so scatter the liquid coolant that comes out, can effectively utilize the outside of pipe and make the time that flows down of liquid coolant elongated.

Evaporimeter of the present invention with above-mentioned structure, because on the upper periphery of above-mentioned cylinder, possesses the device that accumulates that accumulates the aforesaid liquid refrigerant, and on its bottom surface, most dispense orifice that are provided with equably along above-mentioned cylinder periphery are so can be flow to the liquid coolant that accumulates equably on all peripheries of cylinder by dispense orifice.

Fig. 1 is the summary pie graph of the absorption air-conditioner of one embodiment of the invention.

Fig. 2 is the profile of double pipeline.

Fig. 3 is the stereogram of cold water pipe.

10: high-temp regenerator

20: low-temperature regenerator

30: condensed device

40: double pipe portion

41: cold water pipe

42: outer tube

43: the evaporation absorption chamber

44: drip pan

44a: dispense orifice

48: coil

In order further to clearly state above-mentioned formation of the present invention and effect, below explanation is about the suitable embodiment of evaporimeter of the present invention.

Fig. 1 is the summary pie graph as the absorption air-conditioner of one embodiment of the invention.This absorption air-conditioner, possess: the high-temp regenerator 10 of the molten lithium bromide water solution of low concentration that utilizes the combustion heat of burner 1 to heat in fin type heat exchanger 10a, to flow (below, abbreviate low concentration solution, intermediate concentration solution and highly concentrated solution according to the concentration of lithium bromide as); With make heated low concentration solution by high-temp regenerator 10, be separated into the 1st gas-liquid separator 11 of steam and intermediate concentration solution; With the steam that utilizes by high-temperature separator 11, heat the low-temperature regenerator 20 of the intermediate concentration solution that in fin type heat exchanger 20a, flows once again; With make heated intermediate concentration solution by low-temperature regenerator 20, be separated into the 2nd gas-liquid separator 21 of steam and highly concentrated solution; With will be by the condenser 30 of the steam cooling liquid of the 2nd gas-liquid separator 21; With the double pipe portion 40 that makes evaporimeter and absorber formation one.

In addition, though diagram is not come out, possess: the fan of condenser 30 and 40 air-supplies of double pipe portion.

High-temp regenerator 10 and low-temperature regenerator 20 use respectively in the transient heating mode, and the lithium bromide water solution of fin type heat exchanger 10a, 20a is flow through in heating; Compare with the boiler mode, because can reduce the amount of required lithium bromide water solution, the thermal efficiency during heated solution is good, and the start-up time of running beginning is fast.

Condenser 30 is that inner face is all formed the cylindrical duct of the ditch of direction in length and breadth, and most roots erectly are set, and forms at its outer setting fin.Ditch by inner face increases the surface area in the condenser 30, utilizes the wind of being sent here by fan, and steam is cooled off expeditiously.

Double pipe portion 40 as shown in Figure 2, is made of the cold water pipe 41 of the refrigerant that makes not shown indoor set (being water at present embodiment) circulation and the outer tube 42 that is formed on the outside of cold water pipe 41.Between cold water pipe 41 and outer tube 42, form evaporation absorption chamber 43.Cold water pipe 41 outsides at evaporation absorption chamber 43 are provided with the drip pan 44 of ring-type, and at an upper portion thereof, the water spreading nozzle 45 under the water droplet that will be sent here by condenser 30 and low-temperature regenerator 20 are set.

In the bottom surface of drip pan 44, as shown in Figure 3, most dispense orifice 44a of perforation bottom surface dispose fifty-fifty along the periphery of cold water pipe 41.This dispense orifice 44a, its pore size is in the water yield after a little while, because the surface tension of water itself and the degree that can not gone out by orifice flow; Water level in drip pan 44 uprises, and utilizes its hydraulic pressure and hydraulic pressure is gone out, and therefore, can make the water yield that is spilt out by dispense orifice 44a roughly stable, and water is flowed out equably by whole dispense orifice 44a.Again, the part in the evaporation absorption chamber 43 of cold water pipe 41 is used in its outside and is all formed the rill pipe of the ditch of direction in length and breadth.By using the rill pipe, make that the water capacity is easily soaked into its outside, speed of fall is slack-off and easy expansion.And then want to be mounted on the outside that is connected on cold water pipe 41 being wound into spiral helicine coil 48 on its periphery.By this coil 48, the part of the water that is scattered out by dispense orifice 44a, the guiding curl flows, and can effectively utilize cold water pipe 41 outsides and can make that to arrive the required time of bottom longer, makes to scatter the water that comes out and positively evaporate.

Similarly,, the solution tray 46 of ring-type is set also, at an upper portion thereof, the highly concentrated solution of separating in the 2nd gas-liquid separator 21 is set, drop in the solution spreading nozzle 47 on the solution tray 46 at outer tube 42 inner faces of evaporation absorption chamber 43.In the bottom surface of solution tray 46,, most dispense orifice 46a that connect the bottom surface are set fifty-fifty along the inner face of outer tube 42 again.Again, by means such as sandblast processing, with the inner surface roughening of outer tube 42.Utilize this kind to make shaggy means, solution is soaked into easily and speed of fall slack-off, and easily expansion.And the net 49 contact outer tubes 42 inner face ground that utilization will be rolled into drum insert, and can make the high concentration expansion toward about easily of distribution, and guarantor's fluidity is improved.

By evaporation absorption chamber 43 toward the solution circulation line 50 of high-temp regenerator 10 in, setting: make low concentration solution be circulated to the circulating pump 51 of high-temp regenerator 10, the high-temperature heat exchanger 53 that is used for and makes the low temperature heat exchanger 52 of heat exchange and be used for and do heat exchange by the highly concentrated solution that the 2nd gas-liquid separator 21 is sent here by the intermediate concentration solution that the 1st gas-liquid separator 11 is sent here.

In the 1st gas-liquid separator 11 and the 2nd gas-liquid separator 21, overflow pipe 60,70 is set respectively.Be connected to solution circulation line 50.In overflow pipe 60,70, be provided with respectively, the solution temperature in each gas-liquid separator 11,21 closes the heat control valve (HCV) 61,71 of closed channel when set point of temperature is above.

Then, action about this absorption air-conditioner is described.If utilize the combustion heat of burner 1 to heat the low concentration solution that in the fin type heat exchanger 10a of high-temp regenerator 10, flows, then in the 1st separator 11, be separated into steam and intermediate concentration solution.Intermediate concentration solution after the separation after the reduction temperature, is supplied to low-temperature regenerator 20 in high-temperature heat exchanger 53, in in fin type heat exchanger 20a, flowing, heated once again by steam, in the 2nd separator 21, be separated into steam and highly concentrated solution by the 1st separator 11.Highly concentrated solution after the decline temperature, is dropped on the solution tray 46 by solution spreading nozzle 47 in low temperature heat exchanger 52, then by most dispense orifice 46a that are arranged on the solution tray 46, along the inner face distribution of outer tube 42.The highly concentrated solution that scatters utilizes net 49 and to extend to inner face all.

Again, steam is in condenser 30, and being cooled by the air-supply of not shown fan condenses into water; With the water that condenses at low-temperature regenerator 20, together drop on the drip pan 44 by water spreading nozzle 45.Then, if water accumulates in the drip pan 44, then water is forced out by most dispense orifice 44a, and on average is dispersed on the circumference of cold water pipe 41.The water that is scattered out flows down toward the below, and utilizes coil 48 with its part guiding curl.At this moment, water generation convection current is because the contact of all water is on cold water pipe 41, so conductivity of heat improves.So, water flows on the whole outer surface of cold water pipe 41, and near the past expansion by the rill pipe, so can effectively utilize whole outer surfaces.

By evaporation of water, capture the heat that is equivalent to heat of vaporization from the recirculated water that cold water pipe 41, flows, make the recirculated water cooling.Then, in indoor set, the recirculated water by circulation in cold water pipe 41 carries out cold air operation.Again, the steam after the evaporation is absorbed by the highly concentrated solution of outer tube 42 inner faces immediately.At this moment, at the inner face of outer tube 42,, utilize the air-supply of not shown fan and be cooled though highly concentrated solution take place to absorb heat.Highly concentrated solution becomes low concentration solution after absorbing steam, is sent to low temperature heat exchanger 52, high-temperature heat exchanger 53 by circulating pump 51, after the raising temperature, delivers to heating in the high-temp regenerator 10 again.

As described above, according to the absorption air-conditioner of present embodiment, produce following various effects.

1. by scattering water, because can make the evaporation of water enlarged areas, so can improve evaporation efficiency from most dispense orifice that are provided with fifty-fifty along cold water pipe 41 peripheries.Again, utilize the pressure that accumulates water that hydraulic pressure is gone out, the water that is flowed out by dispense orifice 44a is roughly kept necessarily, and water is flowed out by all dispense orifice 44a, can access stable performance.And just can realize with simple structure.Can reduce cost.

2. the part guiding wherein of the water that will be scattered out by dispense orifice 44a by coil 48 is flowed spirally, utilizes and effectively utilizes the outer surface of cold water pipe 41, and make the time that arrives the bottom longer, can improve evaporation efficiency.Again because as long as the simple structure that coil 48 is arranged on the outside of cold water pipe 41 just can reach, so can reduce cost.

3. the simple structure that evaporates and absorb by the evaporation absorption chamber 43 that is formed between cold water pipe 41 and the outer tube 42 because can make simple structureization, so can make the equipment miniaturization weight reduction, can reduce cost.Again, evaporate and absorb by the relative face that utilizes evaporation absorption chamber 43, steam is absorbed by highly concentrated solution swimmingly, and then by cooling off around the cold water pipe 41, so efficient is good.

4. high-temp regenerator 10 and low-temperature regenerator 20 are respectively by the transient heating mode of utilizing fin type heat exchanger 10a, 20a, compare with the boiler mode, needed lithium-bromide solution amount can reduce in device, can shorten the start-up time (by the time of entry into service to regular supply cold air or heating installation) of running beginning.Again, by the fin type heat exchanger, the thermal efficiency when heated solution is good.

Embodiments of the invention more than have been described, yet the present invention only limits to this embodiment, so long as do not break away from the scope of main idea of the present invention, certainly implements various examples.

For example, though thermantidote only has been described in the present embodiment, yet, by the distribution position of switching highly concentrated solution and water, also can be used for carrying out the so-called cooling and warming unit of heating installation running.

Again, in the present embodiment, use the rill pipe to be used as cold water pipe 41, but also be not limited thereto, for example also can use smooth tubes.

Again, also be not limited to evaporimeter and absorber are formed incorporate double pipe structure, make its evaporation, cool off the evaporimeter of the structure of flowing liquid in cylinder by this, just can be suitable for so long as scatter liquid coolant along the outside of the cylinder that vertically is provided with.

And refrigerant and absorption liquid neither only limit to water and lithium bromide; Also can be other kind combination.

As previously discussed, if according to evaporimeter of the present invention, effectively utilize the outside of pipe and make the time that flows down of liquid coolant elongated, because can improve the evaporation efficiency of liquid coolant, so can improve cooling performance.Again, because as long as the simple structure of coil is installed, so can reduce cost.

And, if according to evaporimeter of the present invention, utilize with liquid coolant stay equably cylinder all on because can improve the evaporation efficiency of liquid coolant, so can improve cooling performance.Again, because simple structure, so can reduce cost.

Claims (2)

1. an evaporimeter is arranged in the absorption air-conditioner, is liquid coolant is dispersed on the outside of the cylinder that vertically is provided with, and makes the liquid coolant evaporation, cools off the evaporimeter of flowing liquid in this cylinder, it is characterized by:

To be wound into spiral helicine coil, be installed on the above-mentioned cylinder outside.

2. an evaporimeter is arranged in the absorption air-conditioner, is liquid coolant is dispersed on the outside of the cylinder that vertically is provided with, and makes the liquid coolant evaporation, cools off the evaporimeter of flowing liquid in this cylinder, it is characterized by:

On the upper periphery of above-mentioned cylinder, possesses the device that accumulates that accumulates the aforesaid liquid refrigerant;

The above-mentioned device that accumulates possesses most dispense orifice that are provided with equably along above-mentioned cylinder periphery on its bottom surface.

Images