TWI629442B - Energy-saving device of freeze dryer - Google Patents

Abstract

The utility model relates to an energy-saving device for a freeze dryer, which is mainly arranged between a drying chamber of a freeze dryer and a water-cooled cooler and a compressor, and is provided with a flow dividing member and a second plate heat exchanger. When the drying chamber needs to be heated, the diverter is opened, and the heat energy of the high-pressure high-temperature gaseous cold coal generated by the compressor is exchanged to the circulating oil by the second plate heat exchanger to provide the hot temperature of the drying chamber, and is circulated When the temperature of the oil is insufficient, the electric heater is turned on, thereby saving the electric power of the original freeze dryer which needs to be heated by the electric heater, and also saving the water energy which needs to cool the refrigerant by the water-cooled cooler.

Description

Energy-saving device of freeze dryer

The invention relates to an energy-saving device for a freeze dryer, in particular to an energy-saving device that can save the electricity needed for freezing and drying the oil to be heated by an electric heater, and also save the water energy that needs to cool the refrigerant.

Press; general vegetables and fruits, meat and fish feed, Chinese medicine, royal jelly, instant foods, and enzymes, microorganisms, medicines, etc., due to storage problems, the industry usually uses freeze-drying methods to increase the shelf life. By freeze-drying, the intact nutritional composition, shape, size, color and structure can be retained, and it can be quickly and completely restored after adding water. It is quite convenient to use and can be stored for a long time at room temperature without the need to add any preservatives to freeze-drying. Processed food is lightweight, easy to carry and transport, and has low shipping costs. Freeze dryer When the water is in a high vacuum environment, below the triple point (about 0 ° C, 4.58 Torr), water can only exist as a solid and gas at any temperature, so we use this feature to first sample Frozen, the sample is heated under high vacuum. At this time, the water in the sample will directly sublimate into a gas and be frozen on the condenser to achieve the purpose of drying.

The structure of a conventional freeze dryer is shown in Fig. 1. It includes a drying chamber 1. The drying chamber 1 is connected to a circulating oil pump 2 and an electric heater 3. The circulating oil pump 2 and an electric heater Device 3 is connected to the first plate heat exchanger 4, a compressor 5, is connected to a water-cooled cooler 6, the water-cooled cooler 6 is connected to the first solenoid valve 7 and the second solenoid valve 8, and The first solenoid valve 7 and the second solenoid valve 8 are connected to the condensation chamber 9 and the first heat exchanger 4, respectively. During use, the drying chamber 1 is used to place food samples such as fruits and vegetables, meat and fish feed, Chinese medicine, royal jelly, instant solubles, and samples such as enzymes, microorganisms, and medicines. The vacuum in the samples is extracted by vacuum and appropriate heating action It becomes water vapor in the environment, and the water vapor can naturally flow to the lower temperature condensation chamber 9 and condense into ice on the condensation chamber 9 to reduce the water vapor. Its freeze-drying action is: 1, when the drying chamber 1 is warmed up ( The temperature of the oil increases), the electric heater 3 is turned on, and the first solenoid valve 7 is turned on, and the second solenoid valve 8 is turned off at the same time. 2. When the drying chamber 1 is cooled (oil cooling), open the second solenoid valve 8 and close the first solenoid valve 7 at the same time, so that the high-pressure high-temperature gaseous refrigerant generated by the compressor 5 is converted to a high-pressure normal temperature by the water-cooled cooler 6 The gaseous refrigerant can cool the oil by the first plate heat exchanger 4. 3. When the condensation chamber 9 is activated, open the first solenoid valve 7 and close the second solenoid valve 8 at the same time, so that the high-pressure high-temperature gaseous refrigerant generated by the compressor 5 can be converted by the high-pressure normal-temperature gaseous refrigerant converted by the water-cooled cooler 6 Flow through the condensation chamber 9.

The conventional freeze dryer requires the electric heater 3 to be turned on for a long time when the drying chamber 1 is heated, so it needs to consume a certain amount of electricity, and when the condensation chamber 9 is activated, it needs to be converted to high pressure by the water-cooled cooler 6. Gaseous refrigerant at room temperature requires a certain amount of water. For a modern society that pays more attention to environmental protection and energy conservation, it seems that it does not meet the needs of environmental protection. In view of this, the applicant has, after continuous research and experimentation, designed an energy-saving device for a freeze dryer, so that the freeze dryer can achieve the purpose of saving energy.

The main purpose of the present invention is to provide an energy-saving device for a freeze dryer, so that the freeze dryer can save electricity for freezing and drying the electric power needed to increase the temperature of the oil by means of an electric heater, and also save water that needs to cool the refrigerant. Energy to achieve environmental protection.

The energy-saving device of the aforementioned freeze dryer is located between the drying chamber of the freeze dryer and the water-cooled cooler and the compressor, and is provided with a splitter and a second plate heat exchanger connected to each other.俾 When the drying chamber needs to heat up, open the diverter, and use the second plate heat exchanger to exchange the heat energy of the high-pressure high-temperature gaseous cold coal produced by the compressor to the circulating oil, provide the heating temperature of the drying chamber, and The electric heater is turned on when the temperature of the oil increase is insufficient, which can save the electricity of the original freeze dryer which needs to heat the oil by the electric heater, and also save the water energy which needs to cool the refrigerant by the water-cooled cooler.

The energy-saving device of the aforementioned freeze dryer, wherein the flow dividing member connected between the water-cooled cooler and the compressor and a second plate heat exchanger is a solenoid valve.

Please refer to FIG. 2 and FIG. 3 at the same time, and cooperate with FIG. 4 and FIG. 5, which are a perspective view of the present invention, a perspective view of the shunt member, and a block diagram. As shown in the figure, the present invention includes a drying chamber 1, which is connected to a circulating oil pump 2, and the circulating oil pump 2 is connected to a first plate heat exchanger 4, and The plate heat exchanger 4 is connected to an electric heater 3; a compressor 5 is connected to a water-cooled cooler 6, the water-cooled cooler 6 is connected to the first solenoid valve 7 and the second solenoid valve 8, and The first solenoid valve 7 and the second solenoid valve 8 are connected to the condensation chamber 9 and the first plate heat exchanger 4 respectively. Among them, a splitter 10 and a second plate heat exchanger 11 interconnected with each other are provided between the drying chamber 1 and the electric heater 3 and the water-cooled cooler 6 and the compressor 5. In this embodiment, the splitter The 10 series is a solenoid valve, which is located in the lower middle position of the entire machine.

The combination of the aforementioned components constitutes an energy-saving device for a freeze dryer.俾 When the drying chamber 1 needs to be heated up, the diverter 10 is opened, and the heat energy of the high-pressure high-temperature gaseous cold coal generated by the compressor 5 is exchanged to the circulating oil by the second plate heat exchanger 11 to provide the heat of the drying chamber 1. Temperature, and turn on the electric heater 3 when the temperature of the circulating oil is insufficient, so as to save the electricity of the original freeze dryer which needs to warm the oil by the electric heater 3, and when the condensation chamber 9 is cooling, the The opening of the diverter 10 causes part of the high-pressure and high-temperature gaseous refrigerant to pass through the diverter 10 to the second plate heat exchanger 11 and flows through the condensation chamber 9 to form a cooling effect, thereby saving the water-cooled cooler 6 needed to cool the refrigerant. Water energy. The control action of the present invention is operated by a computer program. When the drying chamber 1 needs to be heated, the computer program is opened.

Please refer to FIG. 6, which is a diagram of the heating operation of the drying chamber of the present invention. As shown in the figure, the heating operation of the drying chamber 1 according to the present invention is the following flow: 1. When the drying chamber 1 needs to be heated (the circulating oil is heated), a computer program starts to operate, and the first solenoid valve is controlled by the computer program. And the diverter 10 is opened, and the second solenoid valve 8 is closed at the same time. 2, the high-pressure high-temperature gaseous refrigerant generated by the compressor 5 is transmitted to the second plate heat exchanger 11 through the splitter 10. 3. The second plate heat exchanger 11 exchanges the heat energy of the high-pressure high-temperature gaseous cold coal to the circulating oil, and provides the heating temperature of the drying chamber 1. 4. If the temperature of circulating oil increase is not enough during the aforementioned operation, the electric heater 3 needs to be turned on again to increase the temperature.

Through the above-mentioned operation flow, the temperature required for the drying chamber 1 to heat up is transferred from the splitter 10 to the second plate heat exchanger 11 to the circulating oil. It is necessary to improve the conventional freeze dryer when the drying chamber 1 is heated up. The circulating oil is warmed by the electric heater 3, and the high-pressure high-temperature gaseous refrigerant generated by the compressor 5 is transmitted to the second plate heat exchanger 11 through the splitter 10 and exchanged with the circulating oil, which can save the original need to borrow Electric heater 3 will increase the temperature of the circulating oil to meet the requirements of energy conservation and environmental protection.

Please refer to FIG. 7, which is a diagram of the cooling operation of the drying chamber of the present invention. As shown in the figure, when the drying chamber 1 needs to cool down (circulating oil cooling), the present invention has the following operation flow: 1. When the drying chamber 1 needs to cool down (circulating oil cooling), the computer program opens the second solenoid valve 8 and at the same time Close the first solenoid valve 7 and the diverter 10. 2. The high-pressure high-temperature gaseous refrigerant generated by the compressor 5 is converted into a high-pressure normal-temperature gaseous refrigerant through the water-cooled cooler 6. 3. Since the first solenoid valve 7 and the diverter 10 are closed, the normal-temperature gaseous refrigerant is sent to the first plate heat exchanger 4 through the second solenoid valve 8. 4. The circulating oil is cooled by the first plate heat exchanger 4.

According to the foregoing operation flow, when the drying chamber 1 needs to be cooled, the normal temperature gaseous refrigerant is sent to the first plate heat exchanger 4 by the solenoid valve 8 to further reduce the circulating oil and improve the conventional freeze dryer in the drying chamber 1. When cooling down, it is necessary to completely rely on the water-cooled cooler 6 to cool down the refrigerant, and it is necessary to use a large amount of water to meet the requirements of energy conservation and environmental protection.

Please refer to FIG. 8, which is a cooling action diagram of the condensation chamber of the present invention. As shown in the figure, when the condensation chamber of the present invention is condensed, the following operation flow is used: 冷凝 When the condensation chamber 9 needs to be cooled, the computer program opens the first solenoid valve 7 and the diverter 10, and closes the second solenoid valve 8 at the same time. The high-pressure normal-temperature gaseous refrigerant can flow through the condensation chamber 9 through the first solenoid valve 7 to form a cooling effect. At the same time, due to the opening of the splitter 10, a part of the high-pressure high-temperature gaseous refrigerant is sent to the second plate heat exchanger 11 through the splitter 10, It then flows through the condensing chamber 9 through a solenoid valve 7 to form a cooling effect. In this way, the water energy that originally needed to cool the refrigerant through a water-cooled cooler can be saved, and the requirements of energy conservation and environmental protection can be achieved.

The foregoing embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any minor modifications and changes still retain the essence of the present invention and do not depart from the spirit of the present invention.

In summary, the present invention constitutes an energy-saving device for a freeze dryer by using a flow splitter connected to a compressor and a plate heat exchanger connected to a drying cavity and connected in series to the flow splitter. When the freeze dryer is in operation, the electricity for freezing and drying the oil to be warmed by an electric heater can be saved, and the water energy for cooling the refrigerant can be saved, thereby achieving the purpose of environmental protection. For a practical design, it is an invention of all novelty. The patent application was filed according to the law, and the Bureau would examine it, grant the patent at an early date, and it would be of great virtue.

1‧‧‧ Drying chamber 2‧‧‧ Circulating oil pump 3‧‧‧ Electric heater 4‧‧‧ First plate heat exchanger 5‧‧‧ Compressor 6‧‧‧ Water-cooled cooler 7‧‧‧ First Solenoid valve ‧‧‧Second solenoid valve ‧‧‧‧ Condensing chamber 10‧‧‧ Diverter 11‧‧‧ Second plate heat exchanger

Fig. 1 is a block diagram of a conventional freeze dryer. Figures 2 and 3 are perspective views of the present invention. Fig. 4 is a perspective view of a diverter according to the present invention. Figure 5 is a block diagram of the present invention. Fig. 6 is a diagram of the heating operation of the drying chamber of the present invention. FIG. 7 is a diagram of the cooling operation of the drying cavity of the present invention. FIG. 8 is a cooling operation diagram of the condensation chamber of the present invention.

Claims (6)

An energy-saving device for a freeze dryer, a drying cavity, the drying cavity is connected to a circulating oil pump, the circulating oil pump is connected to a first plate heat exchanger, and the first plate heat exchanger is connected to An electric heater; a compressor connected to a water-cooled cooler, the water-cooled cooler is connected to a first solenoid valve and a second solenoid valve, and the first solenoid valve and the second solenoid valve are respectively connected to a condensation chamber And the first plate heat exchanger, when used in this drying chamber, vegetables, fruits, meat and fish feed, Chinese medicine, royal jelly, instant soluble foods, and samples of enzymes, microorganisms, medicines, etc. are used to extract vacuum and appropriate heating The ice in the sample becomes water vapor in a vacuum environment, and the water vapor can naturally flow to the lower temperature condensation chamber, and condense into ice on the condensation chamber to reduce water vapor. It is characterized by: the drying chamber and the electric heater and water cooling A splitter and a second plate heat exchanger are connected between the type cooler and the compressor. When the drying chamber needs to heat up, the splitter is opened, and the second plate type The heat exchanger exchanges the heat energy of the high-pressure high-temperature gaseous cold coal produced by the compressor to the circulating oil, and provides the heating temperature of the drying chamber, thereby saving the electricity that the original freeze dryer needs to increase the temperature of the oil through an electric heater. When the condensing chamber is cooled, a part of the high-pressure high-temperature gaseous refrigerant is sent to the second plate heat exchanger through the diverter through the opening of the diverter, and the cooling effect is formed by flowing through the condensing chamber, thereby saving the water-cooled cooler. The water energy required for cooling the refrigerant achieves the purpose of energy saving. The energy-saving device for a freeze dryer as described in item 1 of the scope of the patent application, wherein the diverter provided between the drying chamber and the electric heater, the water-cooled cooler, and the compressor is a solenoid valve. The energy-saving device of the freeze dryer as described in the first item of the scope of the patent application, wherein when the drying chamber needs to be heated, the first solenoid valve and the shunt are opened separately, so that the high-pressure high-temperature gaseous refrigerant generated by the compressor passes through the shunt. The parts are transferred to the second plate heat exchanger. The energy-saving device of the freeze dryer as described in the first item of the scope of the patent application, wherein when the drying chamber needs to be cooled, the second solenoid valve is opened, and the first solenoid valve and the shunt are closed at the same time, so that the high pressure and high temperature generated by the compressor The gaseous refrigerant is converted into a high-pressure normal-temperature gaseous refrigerant through a water-cooled cooler, and the normal-temperature gaseous refrigerant is sent to the first plate heat exchanger through a second solenoid valve, and the circulating oil is cooled by the first plate heat exchanger. The energy-saving device of the freeze dryer described in item 1 of the scope of patent application, wherein when the condensation chamber needs to be cooled, the first solenoid valve and the shunt are opened separately, and the second solenoid valve is closed at the same time, so that the high-pressure normal-temperature gaseous refrigerant can be The first solenoid valve flows through the condensation chamber to form a cooling effect. At the same time, due to the opening of the diverter, a part of the high-pressure high-temperature gaseous refrigerant is sent to the second plate heat exchanger through the diverter, and then flows through the condensation chamber through the solenoid valve to form a cooling effect. . In order to save the water energy that originally needed to cool the refrigerant by a water-cooled cooler. The energy-saving device for a freeze dryer as described in item 1 of the scope of patent application, wherein when the temperature of the circulating oil increase is insufficient, the electric heater can be turned on to raise the temperature of the circulating oil.