JPH0829038A - Heating and cooling device - Google Patents

Abstract

PURPOSE:To obtain a heating and cooling device capable of maintaining the temperature of evaporating and cooling with a high accuracy by preventing the change of concentration of a 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 9 of a combination pump 22 is connected to the jacket unit 5. A first tank reserving a refrigerant, and a second tank 2 reserving cooling water, are arranged. The ejector 9, the tanks 1, 2 and a circulation pump 30 are communicated with each other. A supplemental water supplying passage 8 and the ejector 9 are connected to the first tank 1.

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 tank comprising a combination pump combining an ejector, a tank, and a circulation pump, a heat exchange chamber communicating with the ejector, and a refrigerant liquid supply passage for supplying a refrigerant liquid circulating in the combination pump to the heat exchange chamber. A first tank for storing the refrigerant and a second tank for storing the cooling water are provided, a makeup water supply passage or a decompression suction means is provided in the first tank, and a heating fluid supply passage is provided in the heat exchange chamber. It is connected.

[0007]

By providing the make-up water supply passage or the decompression suction means in the first tank for storing the refrigerant, if the concentration of the refrigerant becomes high, the water is replenished from the make-up water supply passage to dilute the refrigerant concentration to a desired value. On the contrary, when the concentration of the refrigerant becomes low, the decompression suction unit decompresses 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, a combination pump 22, a first tank 1, a second tank 2, a makeup water supply passage 8, an ejector 9 as a decompression suction means, and a steam pipe 1 as a heating fluid supply passage.
6 and 6 constitute a heating / cooling device. A pressure control valve 61 and an opening / closing valve 62 are attached to the steam pipe 16.

The combination pump 22 comprises a circulation pump 30, an ejector 9, and a first tank 1 and a second tank 2. The tanks 1 and 2 are connected to the suction side of the circulation pump 30, the discharge side of the circulation pump 30 is connected to the nozzle 33 of the ejector 9, and the diffuser 34 of the ejector 9 is connected to the upper space of the tanks 1 and 2 by the valve 3, 4 and the ejector 9 and the jacket portion 5 are connected via the valve 10. The combination pump 22 supplies the fluid in the tank 1 or 2 to the ejector 9 by the operation of the circulation pump 30 to cause the ejector 9 to perform suction action, and
It is supposed to return to. A part of the fluid discharged from the circulation pump 30 is supplied from the valve 11 to the jacket portion 5.

Refrigerant is stored in the first tank 1. 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 portion of the first tank 1, and is connected to the nozzle 33 of the 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 1. The cooling means 28 includes a spiral cooling pipe 18 provided in the tank 1 and a valve 12 for supplying a cooling fluid.
It consists of and. 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 part of the first tank 1 and the circulation pump 30 are connected to each other through the conduit 2
0 and valve 59 are connected.

At the top of the first tank 1, a steam pipe 16
Is provided and the steam heating pipe 23 connected to the valve 55 via the pipe 56 is provided. The outlet side of the steam heating pipe 23 is connected to the nozzle 33 of the ejector 9 via the valve 14 and the pipe 15. The steam heating pipe 23 is used when the refrigerant in the tank 1 is heated to evaporate water.

Cooling water is stored in the second tank 2. A cooling water supply passage 58 is connected to the upper portion of the tank 2 via a valve 57. The lower part of the tank 2 is connected to the circulation pump 30 via a pipe 32 and a valve 60.

A refrigerant supply pipe 50 for supplying the refrigerant itself to the first tank 1 is connected via a valve 51. This is for replenishing when the refrigerant decreases due to leakage from the device.

Next, the operation will be described. When the reaction vessel 21 is cooled, that is, when evaporative cooling is performed by the jacket portion 5, the valves 59, 3 and 11 are opened, the valves 60 and 4 are closed, and the circulation pump 30 is driven to drive the inside of the first tank 1. The refrigerant is supplied to the ejector 9. Due to the suction force generated in the ejector 9 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 and evaporatively cools the reaction kettle 21. The vapor of the vaporized refrigerant and the refrigerant that has not been vaporized are stored in the valve 10
Through the ejector 9 to the first tank 1 through the valve 3.

The refrigerant liquid reaching the tank 1 is cooled by the cooling fluid supplied from the valve 12 to reach a desired temperature and is sucked into the circulation pump 30. 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 1 becomes high, the refrigerant concentration can be made low by replenishing water from the makeup water supply passage 8, or the refrigerant concentration is lower than a desired value. When the valve becomes thin, the valve 6 is opened and the suction force of the ejector 9 is used to reduce the pressure in the tank 1 to facilitate the evaporation of the water, whereby the water is preferentially vaporized and sucked, so that the refrigerant concentration can be increased. . In this case, the fluid discharged from the diffuser 34 is discharged from the valve 63 to the outside of the system without returning to the tank 1. Usually, since the evaporation temperature of the refrigerant is higher than that of water, the water can be preferentially evaporated and sucked.

By passing the steam through the steam heating pipe 23 provided in the tank 1 to heat the refrigerant liquid, evaporation of water in the refrigerant can be promoted and sucked by the ejector 9.

When heating the reaction vessel 21 instead of evaporative cooling with a refrigerant, the valves 59, 3, 11, 14, 6 are closed and the valves 4, 62 are opened to jacket the heating steam from the steam pipe 16. The circulation pump 30, the ejector 9, and the second tank 2 are communicated with each other while being supplied to the unit 5. By supplying the cooling water from the second tank 2 to the ejector 9, a suction force is generated and the inside of the jacket portion 5 is depressurized to 100 ° C.
The reaction kettle 21 can be heated at a relatively low temperature before and after.

Condensed water of the steam which is heated and condensed in the reaction kettle 21 is sucked by the ejector 9 through the valve 10 and reaches the second tank 2. The temperature in the case of heating with steam is appropriately adjusted by adjusting the pressure of steam supplied to the jacket portion 5, that is, the temperature with the pressure control valve 61, and adjusting the temperature of the cooling water passing through the suction force of the ejector 9. You can

In this embodiment, the ejector 9 of the combination pump 22 is used as the decompression suction means, but other suction means other than the combination pump 22 may be used.

[0022]

The first tank for storing the refrigerant is provided with a makeup water supply passage or a decompression suction means so that when the concentration of the refrigerant becomes thicker, water is replenished to dilute the refrigerant concentration, and conversely the refrigerant concentration becomes thinner. For example, it is possible to prevent the change in the concentration of the refrigerant by sucking the water in the refrigerant with the decompression suction means to increase the concentration of the refrigerant, and therefore, it is possible to maintain the temperature of the evaporative cooling with high accuracy.

By depressurizing and sucking the water in the refrigerant by the depressurizing suction means, 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 tank 2 2nd tank 5 Jacket part 8 Makeup water supply passage 9 Ejector 16 Steam pipe 18 Cooling pipe 21 Reactor pot 22 Combined pump 23 Steam heating pipe 30 Circulation pump

Claims (1)

[Claims] 1. A combination pump including an ejector, a tank, and a circulation pump, a heat exchange chamber communicating with the ejector, and a refrigerant liquid supply passage for supplying a refrigerant liquid circulating in the combination pump to the heat exchange chamber. According to the present invention, a first tank for storing refrigerant as a tank and a second tank for storing cooling water are provided, and a makeup water supply passage or a vacuum suction means is provided in the first tank, and the heat exchange chamber is provided with A heating / cooling device characterized in that a heating fluid supply passage is connected.