CN100582604C

CN100582604C - Gas-liquid two-phase thermoacoustic refrigerator

Info

Publication number: CN100582604C
Application number: CN200410026204A
Authority: CN
Inventors: 刘继平; 种道彤; 严俊杰; 邢秦安; 陈国慧; 林万超
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2004-06-03
Filing date: 2004-06-03
Publication date: 2010-01-20
Anticipated expiration: 2024-06-03
Also published as: CN1584447A

Abstract

A biphasic thermo-acoustic refrigerating apparatus consists of a chamber body, a cooling unit, thermo-acoustic sheet, a distiller, and a piston driven by a motor. The cooling unit and distiller are respectively installed in the chamber with their ends extending out. The piston moves reciprocally to make the biphasic fluids in the chamber have thermo-acoustic movement and form a foamed stream due to flash vaporization and exchanges of mass, momentum and energy between the biphasic fluids. Refrigeration achieves at the zone of distiller by cooling temperature of cooling unit area.

Description

A kind of vapour-liquid two-phase thermoacoustic refrigeration device

Technical field

The invention belongs to air conditioning and refrigeration technology field, be specifically related to utilize mechanical energy to pass through the vapour-liquid two-phase thermoacoustic refrigeration device of the liquid-gas phase transition process realization refrigeration of working medium.

Background technology

Refrigerating plant is widely used in industrial flow and daily life, is bringing into play important effect in modern civilization.But its process of refrigerastion will consume lot of energy, and its device is complicated, the cost height.Therefore, developing efficient, simple, cheap refrigerating plant, is to need the urgent problem that solves at present.Heat sound is to be a kind of physical phenomenon that people recognized already, and the interaction between fluid working substance and the solid can realize the direct conversion between mechanical energy and the heat energy.Therefore, the heat energy power mechanism based on heat sound process comprises thermoacoustic engine and thermoacoustic refrigeration device, all have simple and compact for structure, advantage such as volume is little, and cost is low.But existing thermoacoustic refrigeration device is exerted oneself little, and efficient is low, has influenced its practical application.Its main cause is that these devices use single phase gas as working medium, and density is little, and heat transfer coefficient is low, has limited its power and efficient.

Summary of the invention

The object of the present invention is to provide a kind of simple in structurely, can improve exerting oneself and the vapour-liquid two-phase thermoacoustic refrigeration device of efficient of thermoacoustic refrigeration device.

For achieving the above object, the technical solution used in the present invention is: comprise cavity and be fixed on cavity interior cooler, thermo-acoustic sheet and evaporimeter, be characterized in, cooler and evaporimeter are separately fixed at the top and bottom of cavity, and the middle part of cooler and evaporimeter is positioned at cavity, two ends are positioned at outside the cavity, also are provided with the piston that is connected with drive motors in the upper end of cavity intercooler.

Another characteristics of the present invention are: cooler, thermo-acoustic sheet and evaporimeter are made of the parallel-plate that spacing equates respectively, and its spacing is 0.05-0.1 a times of thermo-acoustic sheet height; Cooler and evaporimeter make by metal material respectively and its highly be the thermo-acoustic sheet height 0.4-0.6 doubly; Thermo-acoustic sheet is made by nonmetallic materials; Piston can also link to each other with electromagnet by spring, and electromagnet links with AC power again.

The one mass transfer enhancement element by the Three Mesh of wire establishment can also be set in the cavity of the present invention, and also can offer hot water outlet and cooling water outlet and water inlet respectively at the upper and lower end of cavity.

Because the present invention is provided with the piston that is connected with drive motors on cavity top, the excitation cavity inner fluid generation that pumps by piston periodically is forced to the motion of heat sound, because quality, momentum and energy exchange between continuous flash distillation of liquid phase and the vapour-liquid two-phase, make the two-phase working substance of cavity no longer be in stratification state, but present more uniform bubble-flow regime, by reducing the temperature of cooler area, can reach lower temperature in the evaporimeter zone, thereby realize process of refrigerastion.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention 1, and wherein Fig. 1 (a) is the front view of embodiment 1, and Fig. 1 (b) is the left view of Fig. 1 (a);

Fig. 2 is the structural representation of the embodiment of the invention 2.

The specific embodiment

Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are described in further detail.

Embodiment 1, referring to Fig. 1 (a), the present invention includes cavity 3 and be fixed on cooler 5, thermo-acoustic sheet 6 and the evaporimeter 7 that the parallel-plate that is equated by spacing in the cavity 3 constitutes from top to bottom successively, adjacent two blocks of parallel-plates have constituted the fluid working substance passage, and its spacing is 0.05-0.1 a times of thermo-acoustic sheet 6 height.Be made up of the sheet metal of good heat conductivity referring to Fig. 1 (b) cooler 5, mid portion is positioned at cavity 3 inside, and two ends are in certain cooling medium; Its effect is to discharge the heat that produces in the process of refrigerastion.Evaporimeter 7 is made up of heat conductivility good metal sheet, and two end portions is stretched out outside the cavity, the output refrigerating capacity, and cooler 5 and evaporimeter 7 highly are 0.4-0.6 times of thermo-acoustic sheet 6 height made by nonmetallic materials.Acting as of thermo-acoustic sheet 6: and the exchange heat between the fluid working substance plays the effect of backheat; The motion of convection cell working medium produces suitable resistance to add heat-flash sound process.The upper end of cavity 3 intercoolers 5 also is provided with the piston 4 that is connected with drive motors 1 by traction rotating shaft 2.When piston 4 remained static, because the effect of gravity, liquid phase was in cavity 3 bottoms, and vapor phase is in cavity 3 tops.If there are not heating and cooling, the vapour-liquid two-phase in the cavity 3 is in thermodynamic equilibrium state, and its temperature equates that the pressure of steam equals the saturation pressure of its temperature correspondence.Its concrete course of work is: traction rotating shaft 2 around fixed point rotation, makes piston 4 shuttling movement up and down reciprocatingly in cavity 3 under the drive of drive motors 1.In a cycle period, when piston 4 is in lowest order, cavity 3 internal pressure maximums; This back piston 4 moves upward rapidly and makes cavity 3 internal pressures sharply descend, and causes the liquid phase working fluid flash distillation, and the bubble that flashes off is taken away latent heat, makes the liquid phase working fluid temperature reduce.When piston 4 was in highest order, cavity 3 internal pressures were minimum; This back piston 4 moves downward rapidly, makes cavity 3 internal pressures sharply increase, the liquefaction of part bubble, thus the latent heat of vaporization is passed to vapour phase working medium, its temperature is further raise.Because piston 4 does not stop to move back and forth, thereby makes cavity 3 upper temps progressively raise, and temperature of lower does not stop to reduce.When the motion frequency of piston 4 has frequency identical with the event of two-phase fluid working medium, just can produce resonance, the heat sound motion of fluid is the strongest, refrigeration the best of this moment.By the temperature of outside measure control cooler 5, can be in the enough refrigerating capacitys of evaporimeter 7 parts output.

Embodiment 2: referring to Fig. 2, present embodiment is provided with a heat conduction reinforced element 11 by the Three Mesh of wire establishment in cavity 3, and on cavity 3, the lower end offers hot water outlet 10 and cooling water outlet 12 and water inlet 13, piston 4 links to each other with electromagnet 8 by spring 9, electromagnet 8 links with AC power again, because AC power is alternately sent electromagnet 8, around electromagnet 8, alternately produce magnetic field, piston 4 is on the effect lower edge of magnetic field and spring 9 cavity 3, following motion, the water generates that is entered in the cavity 3 by water inlet 13 is changed, hot water is discharged by hot water outlet 10, and cold water is discharged by cooling water outlet 12.

Claims

1, a kind of vapour-liquid two-phase thermoacoustic refrigeration device, comprise cavity [3] and be fixed on the interior cooler [5] of cavity [3], thermo-acoustic sheet [6] and evaporimeter [7], cooler [5] and evaporimeter [7] are separately fixed at the top and bottom of cavity [3], and the middle part of cooler [5] and evaporimeter [7] is positioned at cavity [3], two ends are positioned at outside the cavity [3], also be provided with the piston [4] that is connected with drive motors [1] in the upper end of cavity [3] intercooler [5], it is characterized in that: said cooler [5], thermo-acoustic sheet [6] and evaporimeter [7] are made of the parallel-plate that spacing equates respectively, its spacing is 0.05-0.1 a times of thermo-acoustic sheet [6] height, and cooler [5] and evaporimeter [7] are made by metal material respectively and it highly is thermo-acoustic sheet [6] 0.4-0.6 highly times.

2, vapour-liquid two-phase thermoacoustic refrigeration device according to claim 1, it is characterized in that: said thermo-acoustic sheet [6] is made by nonmetallic materials.

3, vapour-liquid two-phase thermoacoustic refrigeration device according to claim 1 is characterized in that: said piston [4] can also pass through spring [9] and link to each other with electromagnet [8], and electromagnet [8] links with AC power again.

4, vapour-liquid two-phase thermoacoustic refrigeration device according to claim 1, it is characterized in that: a mass transfer enhancement element [11] by the Three Mesh of wire establishment can also be set in the said cavity [3], and also can offer hot water outlet [10] and cooling water outlet [12] and water inlet [13] respectively at the upper and lower end of cavity [3].