CN1195188C - Vehicle-use low temperature refrigerator - Google Patents
Vehicle-use low temperature refrigerator Download PDFInfo
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- CN1195188C CN1195188C CNB031166970A CN03116697A CN1195188C CN 1195188 C CN1195188 C CN 1195188C CN B031166970 A CNB031166970 A CN B031166970A CN 03116697 A CN03116697 A CN 03116697A CN 1195188 C CN1195188 C CN 1195188C
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Abstract
The present invention relates to a refrigeration system of a low temperature refrigerator for cars, which adopts the overlapped refrigeration circulation of diffuse absorption refrigeration and semiconductor refrigeration. A diffuse absorption refrigeration part is taken as a high temperature side which provides a cold source at the temperature from-15 DEG C to-20 DEG C, and a semiconductor refrigeration part is used as a low temperature side which provides a cold source at the temperature of-38 DEG C. The two refrigeration systems both adopt a 12V or a 24V DC power supply. The refrigerator mainly comprises a generator, a rectifier, a condenser, a high temperature evaporator, a semiconductor refrigeration element, a heat conductive block, a low temperature evaporator, a gas heat exchanger, an absorber, a liquid heat exchanger, a computer fuzzy controller, a temperature sensor, an electric heating rod, etc. Computer fuzzy control is adopted in order to make the system work normally with high efficiency. The output power of the electric heating rod is automatically regulated by utilizing the fuzzy control principle according to the deflection and the variation rate of temperatures set by all points.
Description
Technical field:
What the present invention relates to is a kind of automobile-used low temperature refrigerator, particularly a kind of employing 12V or 24V dc source, movement-less part, the automobile-used low temperature refrigerator of superposition type.Belong to electromechanics and refrigeration technology field.
Background technology:
Along with the development of biologic medical engineering, the biological products test sample book need be lower than subzero 30 ℃ of preservations, and the low temperature transportation has become the problem that presses for solution.And existing refrigerator is to adopt the compression-type refrigeration circulation entirely, needs the AC power of 220V or 380V, and volume weight is bigger, particularly to the vibratory impulse of vehicle delivery process, all can not adapt to.The patent No. is " vehicle refrigerator " patent of ZL96230872.2 in the prior art, is a kind of vehicle refrigerator that adopts semiconductor cooling device, and its refrigerating capacity is little, can only do refrigeration and use (more than 5 ℃).The patent No. is the shunting direct-cooling type automobile refrigerator of ZL01213959.9, is a kind of shunting direct-cooling type automobile incubator, utilizes car air-conditioner part cold, also can only play the refrigeration effect.
Summary of the invention:
For deficiency and the defective that overcomes prior art, the refrigeration system of the present invention's design adopts the cascade refrigeration circulation of diffusion absorbing refrigeration and semiconductor refrigerating, power source adopts the 12V or the 24V dc source of generator output on the car, or directly adopt the AC power of 220V, the about 300W of input power.Refrigeration system adopts the diffusion absorbing refrigeration and the cascade refrigeration of semiconductor refrigerating to circulate.Diffusion absorption refrigeration part provides-15 ℃～-20 ℃ low-temperature receiver as the high temperature side of superposition type system, cools off the hot junction of semiconductor refrigerating part, make the cold junction of semiconductor refrigerating part produce-38 ℃ low-temperature receiver, thereby temperature can keep below-30 ℃ in the refrigerator.
High temperature side diffusion absorbent refrigeration system adopts ammonia, water, helium as working medium, and ammonia is as cold-producing medium, and water is absorbent, and helium is evaporation, the condensing pressure of diffusant with balance sysmte, and the low temperature side semiconductor refrigerating adopts the semiconductor refrigerating element.
The present invention includes: generator, rectifier, condenser, high-temperature evaporator, semiconductor refrigerating element, metal heat-conducting piece, cryogenic vaporizer, gas heat-exchanger, absorber, liquid heat exchanger, computer fuzzy controller, temperature sensor and electrically heated rod.The present invention adopts the diffusion absorbing refrigeration and the cascade refrigeration of semiconductor refrigerating to circulate, and the diffusion absorbing refrigerating part provides-15 ℃～-20 ℃ low-temperature receiver as high temperature side, and the semiconductor refrigerating part provides-38 ℃ low-temperature receiver as low temperature side.Two refrigeration systems all adopt the dc source of 12V or 24V to be used as power.The gaseous state outlet of generator is connected with the import and the import of liquid heat exchanger shell side of rectifier respectively with liquid outlet, outlet links to each other with the tube side of liquid heat exchanger in the import of generator, the outlet of rectifier is connected with the import of condenser, the outlet of condenser is connected with the import of high-temperature evaporator, the shell import of the outlet of high-temperature evaporator 4 and gas heat-exchanger is connected, the outlet of the shell of gas heat-exchanger is connected with the gas feed of absorber, the outlet of liquid heat exchanger shell side links to each other with the liquid-inlet of absorber, the liquid outlet of absorber is connected with the import of liquid heat exchanger tube side, the tube side import of the gas vent of absorber and gas heat-exchanger is connected, the tube side outlet of gas heat-exchanger links to each other with the gas feed of evaporimeter, the hot junction of semiconductor refrigerating element is close on the outer surface of high-temperature evaporator, the one side of the cold junction of semiconductor refrigerating element and metal heat-conducting piece is close to, cryogenic vaporizer is the aluminium sheet that places in the refrigerator, the another side of it and metal heat-conducting piece is close to, 4 temperature sensors are placed on the hot junction and the cold junction of semiconductor refrigerating element respectively, and the two sides of cryogenic vaporizer, 4 temperature sensors are electrically connected with the input of computer fuzzy controller respectively, and the output of computer fuzzy controller is electrically connected with electrically heated rod attached to the generator outer surface.Because the refrigeration characteristic of two systems and refrigeration speed differ greatly, can mate, effectively work in order to make system, this patent has been developed a kind of specific fuzzy computer controller specially, according to temperature in the low temperature refrigerator, the deviation of the temperature of semiconductor cold-hot end and diffusion absorbing evaporimeter and deviation variation rate, come to determine regulate the power of electrically heated rod, make this system can be normally, stable, efficiently turn round.This system does not have any moving component, and the vibratory impulse in the anti-driving process is a kind of quiet fully, vibrationless full environmental protection refrigerator.This low temperature refrigerator also has advantages such as volume is little, in light weight, cost is low, application is strong.
Description of drawings:
Fig. 1 is automobile-used low temperature refrigerator structural representation.
1 is generator among the figure, the 2nd, and rectifier, the 3rd, condenser, the 4th, high-temperature evaporator, the 5th, semiconductor refrigerating element, the 6th, metal heat-conducting piece, the 7th, cryogenic vaporizer, the 8th, gas heat-exchanger, the 9th, absorber, the 10th, liquid heat exchanger, the 11st, computer fuzzy controller, 12 is 4 temperature sensors, the 13rd, and electrically heated rod.
The specific embodiment:
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
The present invention mainly comprises as shown in Figure 1: generator 1, rectifier 2, condenser 3, high-temperature evaporator 4, semiconductor refrigerating element 5, metal heat-conducting piece 6, cryogenic vaporizer 7, gas heat-exchanger 8, absorber 9, liquid heat exchanger 10, computer fuzzy controller 11,4 temperature sensors 12, electrically heated rod 13.
The gaseous state outlet of generator 1 is connected with the import and the liquid heat exchanger 10 shell side imports of rectifier 2 respectively with liquid outlet; The tube side outlet of the import of generator 1 and liquid heat exchanger 10 links to each other.The outlet of rectifier 2 is connected with the import of condenser 3, the outlet of condenser 3 is connected with the import of high-temperature evaporator 4, the shell import of the outlet of high-temperature evaporator 4 and gas heat-exchanger 8 is connected, and the outlet of the shell of gas heat-exchanger 8 is connected with the gas feed of absorber 9.The outlet of liquid heat exchanger 10 shell sides links to each other with the liquid-inlet of absorber 9.The liquid outlet of absorber 9 is connected with liquid heat exchanger 10 tube side imports; The tube side import of the gas vent of absorber 9 and gas heat-exchanger 8 is connected.The tube side outlet of gas heat-exchanger 8 links to each other with the gas feed of evaporimeter 4.The hot junction of semiconductor refrigerating element 5 is close on the outer surface of high-temperature evaporator 4.The one side of the cold junction of semiconductor refrigerating element 5 and metal heat-conducting piece 6 is close to.Cryogenic vaporizer 7 is the aluminium sheets that place in the refrigerator, and the another side of cryogenic vaporizer 7 and metal heat-conducting piece 6 is close to.4 temperature sensors 12 are placed on the hot junction and the cold junction of semiconductor refrigerating element 5 respectively, and the two sides of cryogenic vaporizer 7.4 temperature sensors 12 are electrically connected with the input of computer fuzzy controller 11 respectively, and the output of computer fuzzy controller 11 is electrically connected with electrically heated rod 13 attached to generator 1 outer surface.
What flow in the tube side of gas heat-exchanger 8 is helium, and what shell side flowed is ammonia, helium gas mixture body.What flow in liquid heat exchanger 10 tube sides is concentrated ammonia liquor, and what flow in the shell side is dilute ammonia solution.Concentrated ammonia solution in liquid heat exchanger 10 tube sides enters generator 1, after electrically heated rod 13 heating, decompose ammonification steam and dilute ammonia solution, ammonia steam arrives condenser 3 behind rectifier 2 purifying, condense into after ammoniacal liquor enters high-temperature evaporator 4, be diffused in the helium next from gas heat-exchanger 8 tube sides, become ammonia, helium gas mixture body, absorb the heat in semiconductor element 5 hot junctions simultaneously.Enter absorber 9 behind ammonia, the shell side cooling helium of helium gas mixture by gas heat-exchanger 8.After being cooled off by dense ammoniacal liquor, the shell side of the dilute ammonia solution process liquid heat exchanger 10 that comes enters absorber 9 from generator 1.Weak aqua ammonia becomes concentrated ammonia solution after absorbing ammonia steam in absorber 9, enters generator 1 after these solution process liquid heat exchanger 10 tube side preheatings and heats generation again.Helium enters high-temperature evaporator 4 after entering gas heat-exchanger 8 precoolings in absorber 9.In high-temperature evaporator 4, ammoniacal liquor evaporates the heat that absorbs semiconductor refrigerating element hot junction simultaneously in helium.The ammonia, the helium gas mixture body that produce in the high-temperature evaporator 4 enter in the shell side of gas heat-exchanger 8.
The hot junction of semiconductor refrigerating element 5, be close to the high-temperature evaporator 4 of diffusion absorbent refrigeration system, the heat that the hot junction of semiconductor refrigerating element 5 produces is absorbed the cold counteracting that the diffusion type system produces, and the hot-side temperature of semiconductor refrigerating element 5 is remained at below-15 ℃.Therefore under 12V or the galvanic effect of 24V, the cold junction of semiconductor refrigerating element 5 can maintain-35 ℃～-38 ℃ low-temperature condition, be close to by metal heat-conducting piece 6 and refrigerator cryogenic vaporizer 7 again, absorb the heat in the refrigerator, thereby keep being operated in the case low temperature below-30 ℃.
Computer fuzzy controller 12, cold and hot end and the temperature deviation of diffusion absorbing high-temperature evaporator 4 and the power that deviation variation rate is determined electrically heated rod 13 according to temperature, semiconductor refrigerating element 5 in the low temperature refrigerator, make this system can be normally, stable, efficient operation.
Claims (2)
1, a kind of automobile-used low temperature refrigerator, comprise generator (1), rectifier (2), condenser (3), high-temperature evaporator (4), semiconductor refrigerating element (5), metal heat-conducting piece (6), cryogenic vaporizer (7), gas heat-exchanger (8), absorber (9), liquid heat exchanger (10), computer fuzzy controller (11), temperature sensor (12) and electrically heated rod (13), it is characterized in that this refrigerator refrigeration system adopts the cascade refrigeration circulation of diffusion absorbing refrigeration and semiconductor refrigerating, the diffusion absorbing refrigerating part is as high temperature side,-15 ℃～-20 ℃ low-temperature receiver is provided, the semiconductor refrigerating part is as low temperature side,-38 ℃ low-temperature receiver is provided, two refrigeration systems all adopt the dc source of 12V or 24V, the gaseous state outlet of generator (1) is connected with the import and liquid heat exchanger (10) the shell side import of rectifier (2) respectively with liquid outlet, the tube side outlet of the import of generator (1) and liquid heat exchanger (10) links to each other, the outlet of rectifier (2) is connected with the import of condenser (3), the outlet of condenser (3) is connected with the import of high-temperature evaporator (4), the outlet of high-temperature evaporator (4) is connected with the shell import of gas heat-exchanger (8), the outlet of the shell of gas heat-exchanger (8) is connected with the gas feed of absorber (9), the outlet of liquid heat exchanger (10) shell side links to each other with the liquid-inlet of absorber (9), the liquid outlet of absorber (9) is connected with liquid heat exchanger (10) tube side import, the gas vent of absorber (9) is connected with the tube side import of gas heat-exchanger (8), the tube side outlet of gas heat-exchanger (8) links to each other with the gas feed of evaporimeter (4), the hot junction of semiconductor refrigerating element (5) is close on the outer surface of high-temperature evaporator (4), the one side of the cold junction of semiconductor refrigerating element (5) and metal heat-conducting piece (6) is close to, cryogenic vaporizer (7) is the aluminium sheet that places in the refrigerator, the another side of cryogenic vaporizer (7) and metal heat-conducting piece (6) is close to, 4 temperature sensors (12) are placed on the hot junction and the cold junction of semiconductor refrigerating element (5) respectively, and the two sides of cryogenic vaporizer (7), 4 temperature sensors (12) are electrically connected with the input of computer fuzzy controller (11) respectively, and the output of computer fuzzy controller (11) is electrically connected with electrically heated rod (13) attached to generator (1) outer surface.
2, automobile-used low temperature refrigerator according to claim 1, its feature is that also the diffusion absorbing refrigerating part is a working medium with ammonia, water and helium, ammonia is as cold-producing medium, water is absorbent, helium is evaporation, the condensing pressure of diffusant with balance sysmte, and the low temperature side semiconductor refrigerating adopts the semiconductor refrigerating element, according to the deviation and the rate of change thereof of temperature sensor (12) each point design temperature, utilize fuzzy control principle, regulate the power output of electrically heated rod (13) automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031166970A CN1195188C (en) | 2003-04-29 | 2003-04-29 | Vehicle-use low temperature refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031166970A CN1195188C (en) | 2003-04-29 | 2003-04-29 | Vehicle-use low temperature refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1445500A CN1445500A (en) | 2003-10-01 |
| CN1195188C true CN1195188C (en) | 2005-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031166970A Expired - Fee Related CN1195188C (en) | 2003-04-29 | 2003-04-29 | Vehicle-use low temperature refrigerator |
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| Country | Link |
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| CN (1) | CN1195188C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404977C (en) * | 2006-06-08 | 2008-07-23 | 杭州神锋机电有限公司 | Electronic heat energy conversion cooling system |
| CN104315745B (en) * | 2014-10-11 | 2017-03-29 | 杭州新因环境工程有限公司 | A kind of adjustable diffusion absorbing constant temperature and humidity devices and methods therefor of cold |
| CN110671851B (en) * | 2018-07-02 | 2022-12-20 | 海尔智家股份有限公司 | Refrigerator |
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2003
- 2003-04-29 CN CNB031166970A patent/CN1195188C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1445500A (en) | 2003-10-01 |
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