JP2000354758A - Evaporation cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an evaporation cooling device without causing any supercooling, delayed cooling or ununiform cooling. SOLUTION: A cooling fluid supply passage 7 and a cooling fluid discharge passage 11 are connected to a jacket part 2 of a reaction kettle 1. The inlet side of the cooling fluid supply passage 7 is connected to a heat exchanger 3 and the outlet side of the cooling fluid discharge passage 11 is connected to the heat exchanger 3. The occurrence of supercooling, delayed cooling or ununiform cooling in a material to be cooled is prevented by supplying a cooling fluid controlled to a prescribed temp. in the heat exchanger to the jacket part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for evaporating and cooling an object to be cooled by evaporating latent heat of a cooling fluid while sucking a cooling chamber by suction means. More specifically, it performs various reactions such as polymerization and condensation. The present invention relates to a cooling device for a reaction kettle and a vaporizing cooling device for food, medical products, and the like. These objects to be cooled may be deteriorated by a slight temperature change, and high-precision temperature control is required.

[0002]

2. Description of the Related Art As a conventional evaporative cooling apparatus, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 1-315336. This is a combination pump combining an ejector and a pump, a switching valve means capable of supplying a part of the discharge water of the combination pump to the fluid chamber of the reaction vessel, and a temperature control unit for controlling the temperature of the fluid passing through the ejector. And discharge water from a combination pump for cooling is supplied to the fluid chamber of the reactor to vaporize and cool the reactor.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
Although the temperature of the fluid passing through the ejector can be controlled to adjust the degree of decompression for evaporative cooling, the temperature of the evaporative cooling fluid cannot be made substantially equal to the cooling temperature of the object to be cooled. There has been a problem that supercooling, cooling delay or cooling unevenness occurs. That is, if the temperature of the cooling fluid is lowered to increase the degree of decompression, the object to be cooled is partially cooled too much, or if the temperature of the cooling fluid is raised to increase the degree of decompression, the part is not cooled. Will occur.

Accordingly, an object of the present invention is to maintain the two fluid temperatures at substantially the same temperature by exchanging the temperature of the fluid supplied for vaporizing cooling with the fluid discharged after vaporizing cooling. An object of the present invention is to provide an evaporative cooling device that does not cause supercooling, cooling delay, or cooling unevenness.

[0005]

Means for solving the above problems include a suction means for sucking a fluid, a vaporizing cooling chamber communicating with the suction means, and a cooling means for supplying a cooling fluid to the vaporizing cooling chamber. A cooling fluid discharge passage for discharging the cooling fluid from the fluid supply passage and the evaporative cooling chamber is provided, and the object to be cooled is vaporized and cooled by the latent heat of evaporation of the cooling fluid in the evaporative cooling chamber. The cooling fluid connected to the heat exchanger is exchanged with the discharged cooling fluid.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The cooling fluid supplied by a heat exchanger is heat-exchanged by the discharged cooling fluid having a raised temperature, so that the temperature of the supplied cooling fluid is substantially equal to the temperature of the discharged fluid. The temperature of the cooling fluid to be supplied is not too high or too low, and it is possible to prevent overcooling, delay in cooling, or uneven cooling.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In this embodiment, the jacket portion 2 of the reactor 1 is used as a vaporization cooling chamber.
Here is an example using. Jacket part 2 as evaporative cooling chamber
And a vacuum pump 4 as suction means
, A cooling fluid supply passage 7 for supplying a cooling fluid to the jacket 2, a cooling fluid discharge passage 11 for discharging the cooling fluid from the jacket 2, and the heat exchanger 3 to constitute a vaporizing cooling device.

The reactor 1 has a jacket portion 2 formed substantially over the entire circumference, accommodates an object to be cooled (not shown), and includes a temperature sensor 10 for detecting the temperature of the object to be cooled. A pressure sensor 12 for detecting the pressure in the jacket 2 on the jacket 2 and a temperature sensor 1 for similarly detecting the temperature.
3 is attached. A control valve 8 is attached to a cooling fluid discharge passage 11 at a lower portion of the jacket portion 2 and is connected to a heat exchanger 3 described later.

The heat exchanger 3 has a cooling fluid discharge passage 1 therein.
A cooling fluid pipe 5 is connected to the cooling fluid pipe 5 at the lower end via a pump 9 and a pipe 26 communicating with the cooling fluid supply passage 7 at the upper end. The cooling fluid supplied from the cooling fluid pipe 5 is heat-exchanged by the discharge fluid coil 6 in the heat exchanger 3, supplied to the jacket 2 from the pipe 26 and the cooling fluid supply passage 7, and The object to be cooled is vaporized and cooled.

A vacuum pump 6 as suction means is connected to the secondary side of the discharge fluid coil 6. In addition, an ejector-type in-line heater 21 and a temperature sensor 27 are disposed between the pipe line 26 above the heat exchanger 3 and the cooling fluid supply passage 7.
The in-line heater 21 has a control valve 22
And a heat exchange fluid supply pipe 24 via a check valve 23. The in-line heater 21 supplies the fluid temperature of the cooling fluid supply passage 7 that supplies the cooling fluid to the jacket portion 2, for example, supplies steam for heating or cooling water for cooling by controlling the valve opening of the control valve 22. Thus, the temperature can be arbitrarily and supplementarily controlled.

In this embodiment, not only evaporative cooling by a cooling fluid in the jacket portion 2 but also steam heating by supplying heating steam can be performed. That is, the heating steam supply pipe 30 is connected to the jacket portion 2 by the pressure reducing valve 31.
, The control valve 32, the gas-liquid separator 45, and the pressure sensor 33. A drain discharge pipe 34 for discharging the drain in which the heating steam is condensed is connected to the lower end of the jacket portion 2. The drain discharge pipe 34 is provided with an on-off valve 35.
And the steam trap 36 are arranged in parallel and connected to the suction means 37 for heating. The heating suction means 37 includes an ejector 38, a tank 39, and a circulation pump 40. The ejector 38 sucks the drain in the jacket 2 and a part of the steam that has not been completely condensed.

The circulation path of the heating suction means 37 is branched and connected to the heating steam supply pipe 30 via a pipe 41. A strainer 42 and an opening adjustment valve 43 are attached to the conduit 41. The suction means 3 is connected from the pipe 41 to the heating steam supply pipe 30.
By supplying a part of the circulating fluid circulating through 7,
The temperature of the steam in the heating steam supply pipe 30 can be appropriately reduced. In particular, when the heating steam becomes superheated steam, by supplying a circulating fluid, the steam is suitable for obtaining a saturated temperature steam.

Although not shown, the sensors, control valves, control valves, other valves, pumps, and the like are connected to a controller or control unit so that they can be centrally controlled.

When cooling an object to be cooled (not shown) in the reactor 1, a cooling fluid of a predetermined temperature is supplied to the jacket 2 from the cooling fluid supply passage 7, so that the cooling fluid is cooled in the reactor 1. By taking away the heat of the object and evaporating,
The object to be cooled is vaporized and cooled by the latent heat of evaporation.

For example, when the actual temperature of the object to be cooled in the reaction vessel 1 is about 61 to 62 ° C., and when the temperature of the object to be cooled is cooled to 60 ° C., the temperature of the cooling fluid in the jecket part 2 becomes lower. By exchanging heat with the heat exchanger 3 or controlling the temperature with the in-line heater 21 so that the temperature becomes about 58 to 59 ° C., it is possible to prevent the temperature variation and overshoot of the object to be cooled and accurately set it to a predetermined value. Can be maintained.

Further, in this embodiment, the temperature accuracy of the object to be cooled is improved by controlling the temperature or the pressure in the jacket portion 2 more precisely by adjusting the opening degree of the control valve 8. Can be.

The vaporized steam, which has taken heat from the object to be cooled in the jacket portion 2 and vaporized, and the cooling fluid remaining without being vaporized, exchange heat through the cooling fluid discharge passage 11 below the jacket portion 2 and the control valve 8. Then, the heat is exchanged with the supplied cooling fluid and discharged from the vacuum pump 4 to the outside of the system.

[0018]

According to the present invention, the cooling fluid supplied by the heat exchanger is subjected to heat exchange with the discharged cooling fluid, so that the temperature of the supplied cooling fluid can be made substantially equal to the temperature of the discharged fluid. Alternatively, an evaporative cooling device that does not cause cooling unevenness can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a vaporization cooling device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reaction pot 2 Jacket part 3 Heat exchanger 4 Vacuum pump 7 Cooling fluid supply passage 8 Control valve 11 Cooling fluid discharge passage

Claims (1)

[Claims] 1. A suction means for sucking a fluid, a vaporization cooling chamber communicating with the suction means, a cooling fluid supply passage for supplying a cooling fluid to the vaporization cooling chamber, and a cooling fluid discharging the cooling fluid from the vaporization cooling chamber. A cooling passage provided with a cooling fluid supply passage and a discharge passage connected to a heat exchanger, wherein the cooling fluid is supplied by the heat exchanger. An evaporative cooling device, wherein a fluid exchanges heat with a discharged cooling fluid.