JP3210999B2 - Heating and cooling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cooling or heating an object to be heat-treated. About what you can do. Specifically, the present invention relates to a reactor for performing various reactions, and a heating and cooling device for food, medical products, synthetic fibers, and the like. These heat-treated objects often cause thermal damage due to a slight change in temperature, and therefore, it is necessary to accurately maintain the temperature.

[0002]

2. Description of the Related Art As a conventional evaporative cooling apparatus using a refrigerant, for example, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 5-106953. It is composed of 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, By using a refrigerant, rapid cooling can be performed, and thermal damage to the object to be heat-treated can be prevented.

[0003]

In the above-mentioned conventional apparatus, there is a problem that the temperature of the evaporative cooling cannot be accurately maintained due to a change in the concentration of the refrigerant over time. Normally, the refrigerant is diluted with water or the like and used at a desired concentration, but after a period of use, the water evaporates and the concentration of the refrigerant becomes high, or conversely, water is mixed in and the concentration of the refrigerant is increased. This is because it becomes thin. When the concentration of the refrigerant changes, the vaporization temperature or the amount of vaporization of the refrigerant changes even in the same pressure state, so that the temperature of vaporization cooling also changes.

[0004] Further, in the above-mentioned conventional apparatus, there is a problem that heat treatment cannot be performed in place of evaporative cooling. In many cases, it is necessary to alternately perform cooling and heating in a reaction kettle, food, and the like.

Accordingly, a technical object of the present invention is to provide a heating / cooling apparatus capable of performing heat treatment together with evaporative cooling, and capable of preventing a change in the concentration of a refrigerant and accurately maintaining the evaporative cooling temperature. is there.

[0006]

The constitution of the heating / cooling apparatus of the present invention is as follows. A combination pump comprising 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 pump is provided with a supply water supply passage or a reduced pressure suction means, and a refrigerant heating means is provided in the refrigerant liquid supply passage.

[0007]

By providing a make-up water supply passage or a decompression suction means in the combination pump, if the concentration of the refrigerant becomes high, water is supplied from the make-up water supply passage to reduce the refrigerant concentration to a desired concentration. Conversely, when the concentration of the refrigerant decreases, the refrigerant concentration can be increased by suctioning the water in the refrigerant under reduced pressure by the reduced-pressure suction means.

By providing the refrigerant heating means in the refrigerant liquid supply passage, it is possible to heat the refrigerant to be supplied to the heat exchange chamber. Therefore, instead of evaporating and cooling, a heating fluid is supplied to heat the object to be heat-treated. You can also.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In this embodiment, an example in which a reaction vessel is used as a heating and cooling device will be described. Reactor 2 with jacket 5 as heat exchange chamber
1, a combination pump 22, a makeup water supply passage 8, a steam ejector 9 as a decompression and suction means, and a refrigerant heating means 16 constitute a heating and cooling device.

The reactor 21 is provided with a raw material inlet 3, a product outlet 4, a stirrer 6, and a temperature sensor 20 as heat treatment objects, and a jacket portion 5 with a supply port 1 and a discharge port 2 for a refrigerant and a heating fluid. 7 is provided. The supply port 1 is connected to a steam pipe 16 via a valve 17.

The combination pump 22 comprises a tank 31, a circulation pump 30, an ejector 32, and a cooling means 28 provided in the tank 31. The tank 31 is connected to the suction side of the circulation pump 30 and the discharge side is connected to the nozzle 3 of the ejector 32.
3, the diffuser 34 of the ejector 32 is connected to the upper space of the tank 31. The ejector 32 and the outlets 2, 7 of the jacket portion 5 are connected to the valves 10, 11, respectively.
Connected through. This combination pump 22
Supplies the refrigerant as the circulating liquid in the tank 31 to the ejector 32 by the operation of the circulation pump 30 and causes the ejector 32 to perform a suction action;
It is designed to return to the tank 31. As the refrigerant, a conventionally used refrigerant is appropriately selected together with the concentration according to the cooling temperature. A part of the circulating liquid is supplied to the refrigerant liquid supply passage 36.
Through the valve 37 to the supply port 1 of the jacket portion 5.

The refrigerant heating means 16 is constructed by connecting, via a valve 27, a heating tank 26 through which a refrigerant liquid supply passage 36 spirals and a pipe 29 for supplying a refrigerant heating fluid to the heating tank 26. I do. Further, as the refrigerant heating means 16, a conventionally known heating means such as an electric type or a steam trace type can be used.

The means 28 for cooling the refrigerant in the tank 31
Is a spiral cooling pipe 18 provided in the tank 31,
And a valve 12 for supplying a cooling fluid. Although depending on the temperature of the object to be cooled, water, a refrigerant, a lower-temperature refrigerant, or the like can be used as the cooling fluid.

A supply water supply passage 8 for supplying make-up water to the tank 31 is connected, and an upper portion thereof is connected to the suction chamber 13 of the steam ejector 9 via a passage 14. The steam pipe 35 is connected to the supply port 1 of the jacket section 5 via the valve 17. The steam pipe 35 passes high-pressure steam generated by the boiler, which is higher than the atmospheric pressure. Steam ejector 9
Is connected to a steam supply passage 15 from a steam pipe 35.

The steam pipe 35 is branched to form a steam heating pipe 2
3 is provided in the tank 31. The steam heating pipe 23 can be used when heating the refrigerant in the tank 31 to evaporate water. The other end of the steam heating pipe 23 is connected to the suction chamber 13 of the steam ejector 9 via a passage 24.

A refrigerant supply pipe 50 for supplying the refrigerant itself to the tank 31 is connected through a valve 51. This is for replenishing when the amount of the refrigerant is reduced due to leakage from the device or the like. At the bottom of the tank 31, the tank 31
A temperature sensor 53 for detecting the temperature of the refrigerant liquid in the inside is attached.

When cooling the reaction vessel 21, that is, when performing vaporization cooling in the jacket section 5, the circulation pump 30 is driven to supply the refrigerant in the tank 31 to the ejector 32. Due to the suction force generated in the ejector 32, the inside of the jacket 5 is also decompressed, and the refrigerant supplied from the refrigerant liquid supply passage 36 is vaporized by the heat of the heat treatment target, and evaporates and cools the heat treatment target. In this case, the valve 27 of the refrigerant heating means 16 is closed and the refrigerant is not heated. The vapor of the vaporized refrigerant and the refrigerant that has not been completely vaporized pass through the valves 11 and 10 and are sucked by the ejector 32 to reach the tank 31.

The refrigerant liquid that has reached the tank 31 is cooled by the cooling fluid supplied from the valve 12, reaches a desired temperature, and is sucked by the circulation pump 30. The temperature of the refrigerant liquid can be controlled by adjusting the supply amount or temperature of the cooling fluid.

When the concentration of the refrigerant in the tank 31 is increased, the concentration of the refrigerant can be reduced by replenishing water from the supply water supply passage 8, or when the concentration of the refrigerant becomes lower than a desired value, the temperature becomes higher. -By supplying steam from the steam supply passage 15 to the muejector 9 to generate a suction force, the inside of the tank 31 is depressurized to make the water easy to evaporate. Can be darkened. Normally, since the refrigerant has a higher evaporation temperature than water, water can be preferentially evaporated and sucked.

The steam is passed through the steam heating pipe 23 provided in the tank 31 to heat the refrigerant liquid, so that evaporation of water in the refrigerant is promoted and the water can be sucked by the steam ejector 9.

When heating the reaction vessel 21 instead of evaporative cooling, the coolant supplied from the coolant supply passage 36 to the jacket portion 5 is heated to a desired temperature by the coolant heating means 16 and supplied. 21 can be heated. In this case, if the refrigerant is heated to a vapor state, the reactor 21 can be heated with steam. Reactor 2
The refrigerant that has heated 1 is sucked into the ejector 32 through the valve 10 or 11.

In the present embodiment, the reaction vessel 21 can be heated by ordinary high-temperature and high-pressure steam from the steam pipe 35 instead of heating by the refrigerant. In this case, the drive of the circulation pump 30 of the combination pump 22 is stopped, the valve 37 is closed, the valve 17 is opened, and the heating steam is supplied from the steam pipe 35 to the jacket portion 5 and the valve 10 is closed. Open the valve 25 and open the discharge port 2 with the steam ejector 9
Connect with By supplying steam from the steam supply pipe 15 to the steam ejector 9, a suction force is generated to reduce the pressure in the jacket portion 5 and heat the reaction vessel 21 at a relatively low temperature of about 100 ° C. it can.

The condensate of the steam condensed by heating the reactor 21 is sucked into the steam ejector 9 via the valve 25 and is discharged out of the system. The temperature for heating with steam can be appropriately controlled by adjusting the pressure, that is, the temperature of the steam supplied to the jacket portion 5 and adjusting the suction force of the steam ejector 9 by adjusting the amount of steam passing therethrough. .

In this embodiment, an example in which the steam ejector 9 is used as the reduced-pressure suction means has been described. Alternatively, a conventionally well-known suction means such as a water ring vacuum pump may be used.

[0025]

The combination pump is provided with a supply water supply passage or a decompression suction means, and when the concentration of the refrigerant is high, water is supplied to reduce the concentration of the refrigerant, and conversely, when the concentration of the refrigerant is low, the water in the refrigerant is reduced. By increasing the concentration of the refrigerant by suction by the reduced-pressure suction means, a change in the concentration of the refrigerant can be prevented, and therefore, the temperature of the evaporative cooling can be accurately maintained.

A refrigerant heating means is provided in the refrigerant liquid supply passage,
By heating the refrigerant to a predetermined temperature, the object to be heat-treated can be subjected to heat treatment instead of evaporative cooling by the refrigerant.

[Brief description of the drawings]

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

[Explanation of symbols]

 Reference Signs List 5 jacket part 8 makeup water supply passage 9 steam ejector 16 refrigerant heating means 18 cooling pipe 21 reaction vessel 22 combination pump 26 heating tank 30 circulation pump 31 tank 32 ejector

Claims (1)

(57) [Claims] 1. 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 heating and cooling device, comprising: a combination pump provided with a makeup water supply passage or a reduced pressure suction means; and a refrigerant heating means provided in the refrigerant liquid supply passage.