JPH0829039A - Heating and cooling device - Google Patents

Abstract

PURPOSE:To obtain a heating and cooling device capable of maintaining the temperature of evaporating cooling with a high accuracy by preventing the change of concentration of refrigerant and capable of effecting heating treatment also. CONSTITUTION:A steam pipe 16 is connected to the jacket unit 5 of a reaction oven 21. The ejector 22 of a first combination pump 1 and the ejector 9 of a second combination pump 2 are connected to the jacket unit 5. Refrigerant is reserved in a first tank 13 while cooling water is reserved in a second tank 17. The first combination pump is provided with a changeover valve 10 while the second combination pump is provided with a changeover valve 19. A supplemental water supplying passage 8 is connected to the first tank 13. The upper part of the first tank 13 is connected to the second ejector 9 through a valve 6 and a pipeline 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cooling or heating an object to be heat-treated, and more particularly to evaporating and cooling the object to be cooled with a refrigerant supplied in a decompressed state of a heat exchange chamber and performing heat treatment. Regarding what you can do. Specifically, it relates to a reactor for performing various reactions, a heating / cooling device for foods, medical products, synthetic fibers and the like. These heat-treated objects often cause thermal damage due to slight changes in temperature, and therefore it was necessary to maintain the temperature with high accuracy.

[0002]

2. Description of the Related Art As a conventional evaporative cooling device using a refrigerant, there is one shown in, for example, Japanese Patent Laid-Open No. 106953/1993. This consists of a combination pump that combines an ejector, a tank, and a circulation pump, a heat exchange chamber that communicates with the ejector, and a refrigerant liquid supply passage that supplies the refrigerant liquid circulating in the combination pump to the heat exchange chamber. By using a refrigerant, rapid cooling can be performed and heat damage to the heat-treated object can be prevented.

[0003]

The above-mentioned conventional device has a problem that the temperature of the evaporative cooling cannot be accurately maintained because the concentration of the refrigerant changes with the passage of time. Usually, the refrigerant is diluted with water etc. to a desired concentration and used, but over the period of use, water evaporates and the concentration of the refrigerant becomes thicker, or conversely water is mixed and the concentration of the refrigerant becomes The reason is that it becomes thin. When the concentration of the refrigerant changes, the vaporization temperature or vaporization amount of the refrigerant changes even under the same pressure state, and the temperature of vaporization cooling also changes.

Further, in the above-mentioned conventional one, there is a problem that the heat treatment cannot be performed in place of the evaporative cooling. In many cases, it is necessary to alternately cool and heat the reaction kettle and food.

Therefore, a technical object of the present invention is to obtain a heating / cooling device which can perform heat treatment together with evaporative cooling, and can prevent the change in the concentration of the refrigerant and maintain the evaporative cooling temperature with high accuracy. is there.

[0006]

The constitution of the heating / cooling device of the present invention is as follows. A first combination pump in which a first ejector, a tank, and a circulation pump are combined, a heat exchange chamber that communicates with the ejector, and a refrigerant liquid that circulates in the first combination pump to the heat exchange chamber. A second passage in communication with the heat exchange chamber, which comprises a supply passage
A second combination pump including an ejector, a tank, and a circulation pump, and a makeup water supply passage or a second ejector is connected to the first tank, and a heating fluid supply passage is connected to the heat exchange chamber. Is.

[0007]

By connecting the makeup water supply passage or the second ejector to the first tank, if the concentration of the refrigerant circulating in the first combination pump becomes high, the water is supplemented from the makeup water supply passage. The concentration of the refrigerant can be reduced to a desired concentration, and conversely, when the concentration of the refrigerant is reduced, the second ejector can suction the water in the refrigerant under reduced pressure to increase the concentration of the refrigerant.

By connecting the heating fluid supply passage to the heat exchange chamber, it is possible to heat the object to be heat treated by supplying the heating fluid instead of evaporative cooling.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment will be described in detail. In this embodiment, an example in which a reaction kettle is used as the heating / cooling device is shown. Reactor 2 with jacket 5 as heat exchange chamber
1, the first combination pump 1, the second combination pump 2, and the makeup water supply passage 8 connected to the first tank 13.
The second ejector 9 and the steam pipe 16 as a heating fluid supply passage constitute a heating / cooling device. A pressure control valve 61 and an opening / closing valve 62 are attached to the steam pipe 16.

The first combination pump 1 is a circulation pump 3
3 and the ejector 22 and the first tank 13. The lower part of the tank 13 is connected to the suction side of the circulation pump 33, and the discharge side of the circulation pump 33 is connected to the nozzle 3 of the ejector 22.
0, and the diffuser 34 of the ejector 22 is connected to the upper space of the tank 13, and the ejector 22 and the jacket portion 5 are connected via the valve 10. The first combination pump 1 is a circulation pump 33.
Is operated to supply the fluid in the tank 13 to the ejector 22 so that the fluid is sucked and returned to the tank 13. Further, a part of the fluid discharged from the circulation pump 33 is supplied to the jacket portion 5 from the valve 11.

Refrigerant is stored in the first tank 13. As the refrigerant, one conventionally used together with the concentration should be appropriately selected according to the cooling temperature. The makeup water supply passage 8 is connected to the upper part of the first tank 13, and is connected to the nozzle 3 of the second ejector 9 via the valve 6 and the pipe 7. Cooling means 28 for cooling the refrigerant in the tank is provided in the lower part of the first tank 13. The cooling means 28 is the tank 1
3, a spiral cooling pipe 18 and a valve 12 for supplying a cooling fluid. As the cooling fluid, water, a refrigerant, a low temperature refrigerant, or the like can be used, depending on the temperature of the object to be cooled. The lower portion of the first tank 13 and the circulation pump 33 are connected by the pipe line 20.

At the top of the first tank 13, the steam pipe 1
A steam heating pipe 23 is provided which is branched from 6 and is connected to the valve 55 via a pipe 56. The outlet side of the steam heating pipe 23 is the pipe line 15
It is connected to the nozzle 3 of the second ejector 9 via. The steam heating pipe 23 is used when the refrigerant in the tank 13 is heated to evaporate water.

A refrigerant supply pipe 50 for supplying the refrigerant itself to the first tank 13 is connected via a valve 51. This is to replenish the refrigerant when the amount of the refrigerant decreases due to leakage from the device.

A pipe line 27 communicating with the atmosphere via a valve 26 is attached to the upper portion of the first tank 13. When the valve 26 is opened, the tank 13 communicates with the atmosphere, and when closed, the tank 13 can be in a sealed state.

The second combination pump 2 comprises a second tank 17, a circulation pump 4 and an ejector 9. Cooling water is stored in the second tank 17. A cooling water supply passage 58 is connected to the upper portion of the tank 17 via a valve 57. The lower part of the tank 17 is connected to the circulation pump 4 via a pipe 32. The nozzle 3 of the second ejector 9 is connected to the lower portion of the jacket portion 5 via the valve 19 and the pipe line 25.

Next, the operation will be described. When cooling the reaction vessel 21, that is, when evaporative cooling is performed by the jacket portion 5, the valves 10 and 11 are opened, the valves 19, 62 and 55 are closed, and the circulation pump 33 is driven to drive the inside of the first tank 13. Of the refrigerant is supplied to the ejector 22. Due to the suction force generated in the ejector 22 part, the inside of the jacket part 5 is also in a depressurized state, and the supplied refrigerant is vaporized by the heat of the reaction kettle 21 to evaporatively cool the reaction kettle 21. The vaporized refrigerant vapor and the unvaporized refrigerant pass through the valve 10 and are sucked by the ejector 22 to reach the first tank 13.

The refrigerant liquid that has reached the tank 13 is cooled by the cooling fluid supplied from the valve 12 to reach a desired temperature and is sucked into the circulation pump 33. The temperature of the refrigerant liquid can be controlled by adjusting the cooling fluid supply amount or temperature.

When the concentration of the refrigerant in the first tank 13 becomes high, the refrigerant concentration can be reduced by supplying water from the makeup water supply passage 8. When the refrigerant concentration becomes lower than the desired value, the circulation pump 4 of the second combination pump 2 is driven, the valve 6 is opened, and the suction force of the second ejector 9 depressurizes the tank 13 to remove moisture. By facilitating the evaporation, the water content is preferentially vaporized and sucked, and the refrigerant concentration can be increased. Usually, since the evaporation temperature of the refrigerant is higher than that of water, the water can be preferentially evaporated and sucked.

The steam heating pipe 2 provided in the first tank 13
By passing steam through 3 and heating the refrigerant liquid,
It can be sucked by the ejector 9 by promoting evaporation of water in the refrigerant.

When heating the reaction vessel 21 instead of evaporative cooling with a refrigerant, the valves 10, 11, 55 and 6 are closed and the valve 1 is closed.
The valves 9, 62 are opened to supply the heating steam from the steam pipe 16 to the jacket portion 5 and drive the circulation pump 4.
By supplying the cooling water from the second tank 17 to the ejector 9, a suction force is generated and the inside of the jacket portion 5 is depressurized, and the reaction vessel 21 is kept at a relatively low temperature of about 100 ° C.
Can be heated.

Condensed water of the vapor which has heated and condensed the reaction kettle 21 is sucked by the ejector 9 through the valve 19 to the second tank 17
To The temperature when heating with steam is 5
The pressure, that is, the temperature of the steam supplied to the pressure control valve 61 can be adjusted, and the suction force of the ejector 9 can be appropriately adjusted by adjusting the temperature of the cooling water passing through the inside.

[0022]

The make-up water supply passage or the second ejector is connected to the first tank to replenish the water by reducing the concentration of the refrigerant when the concentration of the refrigerant becomes high, and conversely when the concentration of the refrigerant becomes low, By sucking the water in the second ejector with the second ejector to increase the concentration of the refrigerant, it is possible to prevent a change in the concentration of the refrigerant, and therefore, it is possible to accurately maintain the temperature of the evaporative cooling.

By depressurizing and sucking the water in the refrigerant by the second ejector, the temperature of the refrigerant is not raised more than necessary, and therefore, even if the refrigerant is liable to be deteriorated at a high temperature, it is in a low temperature state. Water can be removed with.

By connecting the heating fluid supply passage to the heat exchange chamber, it is possible to heat the object to be heat-treated in place of evaporative cooling with a refrigerant.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a heating / cooling device of the present invention.

[Explanation of symbols]

 1 1st combination pump 2 2nd combination pump 4 Circulation pump 5 Jacket part 8 Make-up water supply passage 9 2nd ejector 16 Steam pipe 18 Cooling pipe 21 Reactor 22 First steam ejector 23 Steam heating pipe 33 Circulation pump

Claims (1)

[Claims] 1. A first combination pump in which a first ejector, a tank, and a circulation pump are combined, a heat exchange chamber communicating with the ejector, and a refrigerant liquid circulating in the first combination pump for the heat exchange chamber. A second combination pump including a second ejector communicating with the heat exchange chamber, a tank, and a circulation pump, and the first tank is provided with a makeup water supply passage or a second makeup pump. A heating / cooling device, wherein two ejectors are connected and a heating fluid supply passage is connected to the heat exchange chamber.