TWI403683B - A generator - Google Patents

Abstract

A generator includes a liquid tank, a high temperature device and a nozzle unit. The liquid tank has a receiving room. The high temperature device is disposed on a surface of the liquid tank. The nozzle unit includes a tank, an injecting tube, a nozzle and an oscillating device. The tank is disposed in the receiving room and filled with a working fluid. The injecting tube has one end communicating with the tank. The nozzle is disposed on a surface of the tank and faces the high temperature device. The oscillating device is disposed on the tank to induce oscillation of the working fluid in the tank, wherein the oscillation changes the pressure of the working fluid so that the working fluid is pulled towards the nozzle and is sprayed on the high temperature device by the nozzle.

Description

generator

The present invention relates to a generator, and more particularly to a generator installed in an absorption refrigeration system, and which can increase the evaporation efficiency of the refrigerant.

Referring to FIG. 1, a common absorption refrigeration system 9 generally includes a generator 91, a condenser 92, an evaporator 93, and an absorber 94 (absorber). The generator 91, the condenser 92, the evaporator 93, and the absorber 94 are connected in series by a plurality of circulation pipes 95 to form a closed circuit.

The generator 91 includes a liquid storage tank 911 and a heat source 912. The liquid storage tank 911 accommodates a working fluid, and the heat source 912 can supply thermal energy to the liquid storage tank 911 to evaporate the absorption flowing in the working fluid. Agent. The heat source 912 is divided into two types: direct heating and indirect heating; the direct heating system directly heats the generator 91 by using natural gas or combustion oil, and the non-direct heating uses the heat source 912 to heat another medium and then transfer the heat to the heat source 912. Generator 91.

In addition, the current common working fluids mainly include two kinds of binary solutions of ammonia water and lithium bromide solution. The binary solution can achieve the characteristics of phase change through the absorption and release of one substance to another, and achieve the cycle cooling effect. Among them, ammonia water is a solution of ammonia mixed with water, which uses ammonia as a refrigerant and water as an absorbent. The cooling temperature is about -20 ° C, which is more commonly used in large refrigerators; lithium bromide solution is mixed with lithium bromide and water. The solution is water as a refrigerant, lithium bromide as an absorbent, and its cooling temperature is about 18 ° C, so it is more commonly used in air conditioning systems. The working principle of the conventional absorption refrigeration system 9 will be described below using a lithium bromide solution as a working fluid.

The heat source 912 provides thermal energy to the liquid storage tank 911 of the generator 91, so that the temperature of the lithium bromide solution in the liquid storage tank 911 rises, and the high temperature and high pressure water vapor is evaporated, and the high temperature and high pressure water vapor passes through a first circulation pipe 951. It enters the condenser 92 and condenses into medium temperature liquid water. The medium-temperature liquid water enters the evaporator 93 through a second circulation pipe 952, and is cooled to become low-temperature liquid water, and then depressurizes the low-temperature liquid water through an expansion valve 931, and is sprayed in a third circulation pipe 953. The low temperature and low pressure water vapor is formed. Since the absorber 94 is in a low pressure state of vacuum or near vacuum, the low temperature and low pressure water vapor will automatically flow through the third circulation pipe 953 to the absorber 94, and the body that absorbs heat by using the liquid vaporization The property absorbs heat from the external environment to achieve a cooling effect.

The expanded water vapor is mixed with the normal temperature lithium bromide solution in the absorber 94 to dilute the original lithium bromide solution in the absorber 94. The lithium bromide solution diluted in the absorber 94 is connected to the generator 91 through a fourth circulation pipe 954 and then heated and evaporated, and the lithium bromide solution is increased in concentration due to evaporation of water, and then passed through a fifth circulation pipe 955. The flow back to the absorber 94 causes the high concentration and low concentration lithium bromide solution to circulate continuously in the generator 91 and the absorber 94. The absorption refrigeration system 9 can also be provided with a cooling device 96, in which cooling water flows, and the cooling device 96 is disposed through the absorber 94 and the condenser 92 to maintain the absorber 94. The temperature of the liquid in the condenser 92 is not too high to affect the cooling effect.

As can be seen from the above, in the circulation of the conventional absorption refrigeration system 9, the heat energy absorbed by the generator 91 is used for work, and the cycle cooling efficiency is proportional to the evaporation efficiency of the lithium bromide solution in the generator 91. However, since the conventional absorption refrigeration system 9 heats the lithium bromide solution in the generator 91 to heat the lithium bromide solution, thereby generating a phase change to be converted into water vapor, the evaporation efficiency is not high; Increasing the evaporation efficiency of the generator 91 can only input more energy to the heat source 912, so that the heat source 912 is maintained at a high temperature, but an additional problem of energy consumption is derived.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a generator which enhances the evaporation efficiency of a refrigerant to improve the cycle efficiency of an absorption refrigeration system.

In order to achieve the foregoing object, the technical content of the present invention includes: a generator comprising: a liquid storage tank having an accommodating space therein; and a high temperature component disposed on a side surface of the liquid storage tank; a jetting unit is provided with a receiving tank, a liquid filling tube, a nozzle and an oscillating member. The receiving groove is disposed in the accommodating space of the liquid storage tank to accommodate the working fluid; one end of the liquid filling tube and the sump One surface is in communication; the nozzle is disposed on the other surface of the cavity and opposite to the high temperature component; the oscillating component is disposed in the cavity to oscillate the working fluid in the cavity to change the pressure of the working fluid The nozzle is flowed and sprayed onto the high temperature component.

The above and other objects, features and advantages of the present invention will become more <RTIgt; A schematic diagram of a preferred embodiment of the generator of the present invention is disclosed. In the present embodiment, the generator 1 includes a reservoir 11, a high temperature component 12 and a jet flow unit 13. The high temperature element 12 and the jet flow unit 13 are each disposed in the liquid storage tank 11, and the spray flow unit 13 can spray the high temperature element 12 with liquid.

The liquid storage tank 11 has an accommodating space 111. The bottom of the liquid storage tank 11 or a side surface adjacent to the bottom portion may be provided with a return pipe 112. One end of the return pipe 112 communicates with the accommodating space 111, and the other end Then, it is connected with an absorber 4 (please refer to FIG. 3); between the generator 1 and the absorber 4, a working fluid 5 for circulating refrigeration flows, and the working fluid 5 is divided into low according to the concentration. The working fluid 5a and the high working fluid 5b are concentrated. A first circulation pipe 113 may be disposed at a top end of the liquid storage tank 11 or a side surface adjacent to the top portion. One end of the first circulation pipe 113 communicates with the accommodating space 111, and the other end is connected to a condenser 2 (please Refer to Figure 3) for communication.

The high temperature component 12 can be disposed adjacent to a side surface of the top of the liquid storage tank 11. In the embodiment, the high temperature component 12 can also be coupled to a conductive member 121. In the space 111, the conductive member 121 can absorb the thermal energy of the high temperature element 12 to maintain a high temperature state.

The jet flow unit 13 includes a cavity 131, a liquid injection pipe 132, a nozzle 133 and an oscillating member 134. The pocket 131 is disposed in the accommodating space 111 of the liquid storage tank 11, and the tank 131 can accommodate the low-concentration working fluid 5a. One end of the liquid injection tube 132 communicates with one surface of the container 131, and the other end communicates with the bottom of the absorber 4 (please refer to FIG. 3). The nozzle 133 can be disposed on the other surface of the cavity 131, and the nozzle 133 is opposite to the conductive member 121 of the high temperature component 12. The oscillating member 134 is disposed in the sump 131, so that the squirting unit 13 can oscillate the low-concentration working fluid 5a in the sump 131 by high-frequency oscillation, thereby controlling the pressure state of the low-concentration working fluid 5a. The low-concentration working fluid 5a in the tank 131 can be periodically flowed toward the nozzle 133 and sprayed on the high-temperature conductive member 121.

In this embodiment, the oscillating member 134 may be a piezoelectric film, and the piezoelectric film is vibrated by energizing the piezoelectric film, thereby driving the low-concentration working fluid 5a in the cavity 131 from the nozzle 133. The medium is ejected, and the energization mode of the piezoelectric film is switched by means of frequency control, so that the nozzle 133 can intermittently spray the liquid to the conducting member 121 to prevent the continuous jet flow from reducing the heat transfer efficiency.

Referring to FIG. 3, the overall absorption refrigeration system includes a generator 1, a condenser 2, an evaporator 3, and an absorber 4. The generator 1 is connected to the condenser 2 by a first circulation pipe 113. The condenser 2 is connected to the evaporator 3 through a second circulation pipe 21, and the evaporator 3 is transmitted through a third circulation pipe 31. The absorber 4 is connected to each other, and an expansion valve 32 is disposed adjacent to the evaporator 3 in the third circulation pipe 31. The absorber 4 is connected to the cavity 131 of the generator 1 by a liquid injection pipe 132. And a return pipe 112 is connected to the liquid storage tank 11 of the generator 1. The return pipe 112 may be partially disposed in the liquid injection pipe 132 without being in communication to exchange heat with the liquid filled in the liquid injection pipe 132.

The low-concentration working fluid 5a that has entered the tank 131 by the liquid-filling pipe 132 can be acted upon by the oscillating member 134, and is sprayed through the nozzle 133 in the accommodating space 111 of the liquid storage tank 11 to make a part of the water. The mist-like low-concentration working fluid 5a is in contact with the conductive member 121 of the high-temperature element 12, and instantaneously evaporates the refrigerant in the low-concentration working fluid 5a, so that the evaporated high-temperature and high-pressure gaseous refrigerant passes through the first circulation pipe 113. Flowing out of the generator 1 and entering into the condenser 2 to condense into a medium-temperature liquid refrigerant; another portion of the unvaporized working fluid 5 flows downward in a liquid state and accumulates in the accommodating space of the liquid storage tank 11. At the bottom of 111, a high concentration working fluid 5b is formed and returned to the absorber 4 via the return pipe 112.

The medium-temperature liquid refrigerant in the condenser 2 enters the evaporator 3 through the second circulation pipe 21, and is cooled to become a low-temperature liquid refrigerant, and then the low-temperature liquid refrigerant is lowered through the expansion valve 32. And sprayed in the third circulation pipe 31 to form a low-temperature low-pressure gaseous refrigerant. Since the absorber 4 is in a low pressure state of vacuum or near vacuum, the low temperature and low pressure gaseous refrigerant will automatically flow to the absorber 4 through the third circulation pipe 31, and absorb heat in the external environment to achieve a cooling effect. .

The expanded low-temperature gaseous refrigerant will be mixed with the normal temperature working fluid 5 in the absorber 4 to dilute the high-concentration working fluid 5b which is refluxed to the absorber 4; after the dilution, the concentration of the working fluid 5 can be lowered. The liquid injection pipe 132 is again introduced into the tank 131 for reuse, so that the high and low concentration working fluids 5a, 5b are continuously circulated in the generator 1 and the absorber 4.

Wherein, by disposing a part of the return pipe 112 in the liquid injection pipe 132 without being connected, the high-temperature high-concentration working fluid 5b can conduct a part of the thermal energy to the high-pressure working fluid 5b when it flows back through the return pipe 112. In the liquid injection pipe 132, the low-concentration working fluid 5a of the cavity 131 is injected into the liquid-filling pipe 132 by preheating, so that the low-concentration working fluid 5a is heated, and the low-concentration working fluid 5a is further sprayed to the high-temperature component 12. Evaporation efficiency.

The generator of the present invention directly sprays the high temperature component 12 with a water-like working fluid 5 through a technique of impingement cooling, thereby improving the evaporation efficiency of the refrigerant in the working fluid 5 to simultaneously enhance absorption. Cycle efficiency of a refrigeration system. On the other hand, since the evaporation efficiency of the refrigerant in the working fluid 5 has been increased, the energy supplied to the high temperature element 12 can be relatively lowered to achieve energy saving effects.

The generator of the present invention can be applied to various devices which are cooled by an absorption refrigeration system, and the high temperature component 12 can be further heated by the waste heat discharged from other systems of the device to fully utilize the energy. To avoid waste of energy. The following is a description of an application example of an electric vehicle, which is coupled to a cooling system of an electric vehicle and a heat dissipation system of the electric vehicle motor.

Please refer to Fig. 4, which is an example of use of the present invention. In order to enhance the waste heat collection efficiency of the electric vehicle motor heat dissipation system 6, the motor heat dissipation system 6 includes a casing 61, a fan 62, a heat storage medium 63, and a heat conduction element 64. The casing 61 is provided with a necessary component of a motor such as a stator and a rotor; the fan 62 is coaxially disposed with the rotor, and the blade of the fan 62 protrudes from one side of the casing 61; the heat storage medium 63 The heat storage medium 63 is provided on the other side of the casing 61, and the heat storage medium 63 is made of a porous material having a heat storage capacity (for example, foamed aluminum, ceramics, etc.) to maintain airflow while accumulating heat; Then, the heat storage medium 63 is disposed on the surface of the heat storage medium 63 facing away from the casing 61. The heat conduction element 64 may be a metal material with high thermal conductivity (for example, copper).

When the fan 62 rotates, the low temperature air outside the casing 61 is guided into the casing 61, and the high-temperature waste heat generated when the internal components of the casing 61 operate are guided to the heat storage medium 63. The heat storage medium 63 accumulates waste heat, and through a small hole in the heat storage medium 63, a small amount of hot gas is discharged to the outside of the casing 61, and a majority of the hot gas flows to the heat transfer element 64 to warm the heat transfer element 64. In this embodiment, the surface of the heat conducting element 64 in contact with the heat storage medium 63 may also be arranged in a zigzag shape to increase the contact area thereof, thereby further improving the heat absorbing efficiency of the heat conducting element 64.

Referring to FIG. 5, the motor heat dissipation system 6 can be coupled to the generator 1 of the refrigeration system as a heat source required for the generator 1 to perform an evaporation cycle. In this embodiment, the heat conducting component 64 of the motor heat dissipation system 6 can be coupled to the high temperature component 12 of the generator 1, so that the waste heat generated by the operation of the motor can be concentrated to the high temperature component 12, and the generator 1 is provided. The heat energy required for the work to complete the cycle and achieve the effect of cooling. Therefore, the operation of the electric vehicle refrigeration system hardly consumes additional power of the electric vehicle, so that other systems can have more energy quotas to enhance the working efficiency, so the refrigeration system and the motor cooling system are coupled. It can not only improve the efficiency of space utilization in a limited space, but also help to reduce the size of the overall electric vehicle power equipment, thereby increasing the space for riding, more energy-saving and power-enhancing effects, and the cooling system will not increase when it is activated. The burden of the power source, the cookware does not affect the efficiency of other systems.

In addition, the refrigeration system can be coupled with other systems that generate heat (eg, battery packs, generators, converters, etc.) to take full advantage of waste heat and should not be limited to coupling with the motor cooling system. Those skilled in the art can understand.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

1. . . generator

11. . . Reservoir

111. . . Housing space

112. . . Return tube

113. . . First circulation tube

12. . . High temperature component

121. . . Conductor

13. . . Jet unit

131. . . Crate

132. . . Injection tube

133. . . nozzle

134. . . Oscillating element

2. . . Condenser

twenty one. . . Second circulation tube

3. . . Evaporator

31. . . Third circulation tube

32. . . Expansion valve

4. . . Absorber

5. . . Working fluid

5a. . . Low concentration working fluid

5b. . . High concentration working fluid

6. . . Motor cooling system

61. . . cabinet

62. . . fan

63. . . Heat storage medium

64. . . Thermal element

[知知]

9. . . Absorption refrigeration system

91. . . generator

911. . . Reservoir

912. . . Heat source

92. . . Condenser

93. . . Evaporator

931. . . Expansion valve

94. . . Absorber

95. . . Circulation tube

951. . . First circulation tube

952. . . Second circulation tube

953. . . Third circulation tube

954. . . Fourth circulation tube

955. . . Fifth cycle tube

96. . . Cooling device

Figure 1: Schematic diagram of a conventional absorption refrigeration system.

Figure 2 is a schematic view of a preferred embodiment of the invention.

Figure 3: Schematic representation of the application of the invention to an absorption refrigeration system.

Figure 4: Schematic diagram of the electric vehicle motor cooling system.

Figure 5 is a schematic illustration of a preferred embodiment of the present invention coupled to an electric vehicle motor heat dissipation system.

1. . . generator

11. . . Reservoir

111. . . Housing space

112. . . Return tube

113. . . First circulation tube

12. . . High temperature component

121. . . Conductor

13. . . Jet unit

131. . . Crate

132. . . Injection tube

133. . . nozzle

134. . . Oscillating element

5. . . Working fluid

5a. . . Low concentration working fluid

5b. . . High concentration working fluid

Claims (7)

A generator includes: a liquid storage tank having an accommodating space therein; a high temperature component disposed on one side surface of the liquid storage tank; and a jet flow unit having a cavity, a liquid injection pipe, and a a nozzle and an oscillating member, the receiving groove is disposed in the accommodating space of the liquid storage tank to accommodate the working fluid; the liquid guiding tube has one end communicating with a surface of the receiving groove; the nozzle is disposed at the other of the receiving groove a surface is opposite to the high temperature component; the oscillating component is disposed in the cavity to oscillate the working fluid in the cavity, change the pressure of the working fluid to flow to the nozzle, and spray on the high temperature component. The generator of claim 1, wherein the high temperature component is provided with a conductive member disposed in the accommodating space of the liquid storage tank. The generator of claim 1 or 2, wherein the oscillating member is a piezoelectric film. The generator of claim 1 or 2, wherein the high temperature component incorporates a heat dissipation system. The generator of claim 4, wherein the heat dissipation system is provided with a heat conducting element, the heat conducting element being combined with the high temperature element. The generator according to claim 5, wherein one surface of the heat conducting element is provided with a heat storage medium, and the heat storage medium is made of a porous material. The generator of claim 6, wherein the surface of the heat conducting element in contact with the heat storage medium is sawtoothed to increase a heat transfer area.