KR19980087590A - Air temperature adjusting device for adjusting temperature of brown rice and white rice and adjusting method - Google Patents

Abstract

The present invention is an air temperature adjusting device for cooling or heating the product temperature of brown rice stored in a brown rice tank of a rice mill and a rice polished in a polished rice and a white rice tank with air and a regulated air supply device and brown rice using these devices. And how to adjust the temperature of the rice. The adjustment of product temperature and the prevention of condensation of white rice in brown rice and rice have a problem in that the temperature of the mill is not kept constant because the air temperature in the mill changes over time.

The present invention is to control the cooling and heating capacity from 0 to 100% by using a high temperature and high pressure refrigerant gas discharged from the damper, no-load compressor and electric heater, compressor according to the change in the outside temperature to maintain a constant temperature and relative humidity throughout the year It can be supplied to brown rice tank, rice mill and white rice tank to adjust the temperature of brown rice and white rice in the milling factory all year round, contributing to improving the yield and processing of rice with excellent taste.

Description

Air temperature adjusting device for adjusting temperature of brown rice and white rice and adjusting method

The present invention is an air temperature control device and product temperature adjustment for adjusting the product temperature of the brown rice in the product state stored in the brown rice tank in the rice milling factory and the rice temperature of the polished rice in the polished rice mill and the temperature of the polished rice stored as a product in the rice mill tank It is about a method.

Visitors to the Department of Agriculture, Hokkaido University, Japan, Vol. 17, No. 24, pp. 517-530, and Takeda Research Institute, Vol. 32, No. 3, 400-403, are known to have excellent taste of rice cooked from polished rice at low temperatures. have. However, when the outside temperature is lowered and the temperature of brown rice is too low, the strength is increased to increase the power consumption during milling.

It is also known that when rice is polished, swelling occurs, and the smaller the swelling, the better the taste (p. 70-73 of E1264-0528, 1994 Korea Food Research Institute).

It is known that it is caused by thermal stress due to the rise of rice's product temperature.The higher the product temperature, the more the amount of waste is produced, and the moisture content loss due to frictional heat in the rice is 0.3 ~ 1.0%. ) Has a big impact. In order to smooth out the discharge of rice bran in the rice milling machine and to suppress the excessive temperature rise of rice milling, a rice milling type that blows the rotating shaft in the rice polisher is spreading.

In the case of Japan, the rice is stored in a low-temperature storage that is maintained at about 15 ℃ after the rice is produced and the rice is polished if necessary. The temperature of brown rice is constant throughout the year, so there is no need to adjust the temperature of brown rice separately. However, in Korea, although the temperature difference between the four seasons is large, rice is stored and the rice is refined as needed.

Until now, in order to manage the rice temperature of rice polished at the rice milling machine, the brown rice is made by using the point that the air temperature in the mill is slightly lower than the outside temperature in summer and relatively higher than the outside temperature in winter. There is a limit to the degree of refinement by adjusting to some extent, the product temperature that can be adjusted by conduction, and there is a disadvantage that can not maintain a constant product temperature as the air temperature in the mill changes over time. In addition, in order to prevent a sudden rise in the temperature of the rice being polished, the rice is roughly guessed by touching the rice or by touching it on the cheek, and then the weight of the rice is adjusted by adjusting the weight of the rice polisher. The traditional method is used. However, this method does not keep the temperature constant, and the manager has to constantly adjust the weight. In addition, even using a blower-type rice polisher, there is a disadvantage in that the air temperature in the mill is not constant so that the product temperature in the rice milling can not be kept constant.

When white rice with a relatively high temperature of rice is temporarily stored in the white rice tank after condensation, condensation occurs inside the tank due to the temperature difference with the outside of the tank, condensed water flows into the white rice, causing rice to rot or rust in the tank. In this winter season, the method of making a white rice tank from wood or installing an air vent on top of the white rice tank is used. However, if the white rice tank is made of wood, the wood is hygroscopic, mold or pests occur, and the air vent circulates through the air vent, so that condensation cannot be avoided in winter when the outside air temperature is low. On the other hand, in the case of cooling by inflowing outside air in the winter, there is a drawback that the white rice is dried during the cooling process due to the low relative humidity of the outside air.

The present invention is to constantly adjust the product temperature of the brown rice stored as a product in the brown rice tank and to supply a refiner with a constant temperature to regulate the product temperature of the rice in the rice polish tank to prevent condensation in the white rice tank in order to control the excessive temperature rise of the rice in the rice It is. Compensating for these drawbacks, as well as reducing the incidence of wraps to provide a rice with excellent taste.

1 is a schematic configuration diagram of an air temperature adjusting device of the present invention.

2 is a schematic perspective view of the air temperature adjusting device of the present invention.

Figure 3 is an installation example of the mill in the present invention.

<Description of the code | symbol about the principal part of drawing>

1: no-load compressor 2: indoor heat coil 3: outdoor heat coil

4,5: expansion valve 6: receiver 7: four-way valve

8: liquid separator 9: no-load solenoid valve 10: water tank

12, 13 reverse displacement 14 damper 15 blower

16, 27, 44: electric heater 17: humidifier 18: reheater

19: Outdoor electric coil fan 20, 21, 32, 34, 38: Electronic valve 22, 23: Filter

11, 24, 25, 26, 57 Temperature sensor 28 Limit switch 29 Low pressure switch

30: hydraulic switch 31: high pressure switch 33, 35, 36, 39, 41: stop valve

40: electronic valve 42: controller 43: humidifier controller

45,46: Stop valve 47,48,49: Piping

51, 52, 53, 54, 55, 56, 57, 58, 59, 60: Piping 61, 62, 63: Brown rice tank

75: Hoppa scale 64,65,67,68,70,71,95,96,98,99: Level gauge

66,69,72,97,100 Temperature sensor 73 Belt conveyor 74 Bucket elevator

76,77: Rice milling machine 80: Saragi sorter 88: Color sorter

79,83,87,90: Reserve tank 91: Tailing machine 93,94: White rice tank

101: control panel 78,81,82,85,86,89,92: bucket elevator

102: air temperature regulating device 103,104,105,106,107,108: damper

109: buffer tank 110: pressure adjustment damper 111: cyclone

The configuration of the present invention will be described with reference to Figs. 1, 2 and 3. FIG. 1 shows a flow chart of an air temperature adjusting device 102 for introducing air in a refinery and adjusting and discharging it to a constant temperature and relative humidity, and FIG. 2 shows a schematic perspective view of the air temperature adjusting device 102.

The outside air is introduced by the blower 15, and is cooled or heated in the indoor heat transfer coil 2, and then discharged by controlling the temperature and the relative humidity through the humidifier 17 and the reheater 18. The amount of outside air introduced is controlled by the damper 14, and the freon refrigerant R-22 is used for cooling and heating the outside air.

When cooling the outside air, the refrigerant is compressed into a gas of high temperature and high pressure in the no-load compressor (1) whose capacity is adjusted in several stages, and then the high temperature in the outdoor heat transfer coil (3) through the gas pipe (48) through the four-way valve (7). After condensing into a high-pressure refrigerant liquid, it goes to the receiver 6 through the reverse valve 13. The high temperature and high pressure refrigerant liquid from the receiver 6 is expanded in the expansion valve 4 through the filter 22 and then evaporated in the indoor heat transfer coil 2 and the four way valve 7 through the gas pipe 51. It goes to the compressor via the liquid separator (8).

On the other hand, when heating the outside air, the refrigerant is compressed into a gas of high temperature and high pressure in the no-load compressor (1) and then into the refrigerant liquid of the high temperature and high pressure in the indoor heat transfer coil (2) through the gas pipe 51 through the four-way valve (7) After condensation, it goes to the receiver 6 through the reverse side 12. The high temperature and high pressure refrigerant liquid from the receiver 6 expands in the expansion valve 5 after passing through the filter 23 through the liquid pipe 49 and is evaporated in the outdoor heat transfer coil 3, and then the gas pipe 48. Through the four-way valve (7) and the liquid separator (8) to the compressor (1).

In the air temperature control device, the temperature control is performed by the high-pressure high-pressure gas solenoid 38, the electric heater 16, the reheater 18, which are supplied to the no-load compressor 9 and the indoor heat transfer coil 2 whose capacity is controlled in several stages. It consists of three temperature sensors 24, 25, 26 and a blower damper 14.

When the air temperature in the refinery factory detected by the temperature sensor 24 becomes too high when the outside air is cooled and becomes higher than the freezing capacity of the freezer, the no-load compressor 1 by the controller 42 has the maximum capacity. Is opened to the maximum, the humidifier 17 is stopped, all the electronic valves 32, 34, and 38 supplying the high temperature and high pressure gas are closed, and the damper 14 until the air temperature detected by the temperature sensor 26 reaches the target temperature. ) Is adjusted.

The damper 14 starts to open by the controller 42 when the air temperature in the mill is lowered and the temperature sensed by the temperature sensor 26 begins to be lower than the target temperature. Even if the damper 14 is opened to the maximum by the limit switch 28, when the temperature sensed by the temperature sensor 26 is lower than the target temperature, the controller 42 causes the no-load electronics 9 of the no-load compressor 1 to be indoors. The temperature detected by the temperature sensor 26 is adjusted to the target temperature while the cooling capacity is adjusted to 0 to 100% by the electronic valve 38 that controls the amount of high temperature and high pressure gas flowing into the heat transfer coil 2.

When the temperature in the refinery is too low and the temperature sensed by the temperature sensor 24 that senses the temperature in the paint shop is lower than the target temperature, the indoor cooling coil 2 is heated by the controller 42 and no-load as in cooling. The non-loading electron valve 9 and the damper 14 of the compressor 1 operate, and when insufficient heat source is generated, the electric heater 16 operates to control the temperature sensed by the temperature sensor 26 to be the target temperature. At this time, the defrost of the outdoor heat transfer coil 3 is performed while the electric heater 27 is operated by the controller 42 by the temperature sensed by the temperature sensor 57.

On the other hand, when the outside air temperature sensed by the temperature sensor 24 is lower than the target temperature, the relative humidity is lowered by heating when heated in the indoor heat transfer coil 2, so that the relative humidity is controlled so that drying does not occur in the rice during temperature adjustment. . The relative humidity is controlled by the humidifier 17 and the reheater 18. When the heating starts, the humidifier 17 is started by the controller 42 to raise the relative humidity of the air to 95% to the maximum, and the water tank 10 installed indoors to prevent temperature changes due to humidification. The electric heater 44 is operated so that the temperature sensed by the temperature sensor 11 installed at the same as the target temperature. To control the relative humidity to prevent excessive humidification when adjusting the temperature of rice, control the relative humidity to 70-95% by causing the difference in temperature detected by the two temperature sensors 25 and 26 to be 0 to 4 ℃. In order to control the electronic valves 32 and 34 sequentially supplying the high temperature and high pressure gas from the controller 42.

Figure 3 shows a flow chart of the air supply installed in the mill.

In the air temperature adjusting device 102, a pressure adjusting damper is provided to sequentially supply air whose temperature and relative humidity are adjusted to the brown rice tanks 61, 62 and 63, the rice mills 76 and 77, and the white rice tanks 93 and 94. 110 has a buffer tank 109 attached thereto and six dampers 103, 104, 105, 106, 107 and 108.

Pressure adjusting damper 110 is to resolve the difference between the air pressure discharged from the air temperature adjusting device 102 in accordance with the change in the suction pressure and the outside temperature of the cyclone 111 to remove the rice bran generated in the rice mill 76, 77 When the suction pressure of the cyclone 111 is high, the pressure adjusting damper 110 is opened to inhale some of the outside air, and when the suction pressure is low, the air pressure regulator 102 is partially opened to release the pressure to the outside. It is used to balance the discharge pressure with the suction pressure of the milling machine 76, 77 cyclone 111.

The brown rice tanks 61, 62 are equipped with the lower limit level gauges (64, 67, 70), the upper limit level gauges (65, 68, 71) and the temperature sensors (66, 69, 72). , 63). When the signal for adjusting the temperature of the control panel 101 enters the air temperature adjusting device 102, the dampers 106, 107, and 108 are closed, and the dampers 103, 104, and 105 are sequentially opened to adjust temperature and relative humidity. Air is introduced into the brown rice tanks 61, 62, 63. At this time, the temperature of air is in the range of 7 ~ 10 ℃ for cooling, 10 ~ 13 ℃ for heating, and the relative humidity is 70 ~ 95%. When humidification is required according to the moisture content of brown rice, maintain the relative humidity higher than equilibrium moisture content. However, when some drying is required, the relative humidity is kept lower than the equilibrium moisture content. The temperature and relative humidity of the air is adjusted in order to blow the temperature of 20CMM into the brown rice tanks (61, 62, 63) in order.The temperature of brown rice is about 4 to 6 hours per tank in 9 ~ 11 ℃ in spring and autumn, and in summer It adjusts to around 10-13 degreeC in 7-10 degreeC and winter season. The brown rice in the brown rice tank (61, 62, 63) is supplied with air having a relative humidity of about 95%, the moisture content of the 0.5 ~ 1.0% is increased while being absorbed according to the temperature control.

When the rice mills 76 and 77 are operated in the control panel 101 for the rice milling, the dampers 103, 104, 105, 107, and 108 are closed, the dampers 106 are opened, and the air temperature regulating device 102 is 13-18. The air adjusted to deg. At this time, the brown rice with the adjusted temperature is about 3 ° C temperature change by the outside air while passing through the belt conveyor 73 and the bucket elevator 74 in the brown rice tank (61, 62, 63) sequentially. When the outside air is low, about 3 ° C. is low, and when the outside air is high, it is about 3 ° C. At this time, the surface temperature is moistened and the temperature of the product is maintained at about 10 ° C., which is supplied to the rice polishers 76 and 77. The product temperature of the white rice which passed the rice polisher 76,77 by the blowing air whose temperature was adjusted during the rice refinement maintains the low product temperature of 20-25 degreeC. Due to the low frictional heat, the incidence of entrapment in the net is reduced by 0.5 ~ 2%, and the water content of white rice is increased by 0.1 ~ 0.5% compared to the brown rice water content.

When white rice passing through the rice mills 76 and 77 is stored as a product in the rice tanks 93 and 94, the temperature is about 5 to 8 ° C. during the winter season when the rice mills 76 and 77 are not operated by the control panel 101. In addition, air adjusted to a relative humidity of 70 to 95% is sequentially supplied to the white rice tanks 93 and 94 to cool the white rice in 4 to 5 hours to prevent condensation.

The present invention is to control the cooling and heating capacity according to the change in the outside air temperature to supply the brown rice tank 7 ~ 13 ℃, 70 ~ 95% controlled air while maintaining the outlet air temperature and relative humidity of the air temperature control device automatically The product temperature of brown rice in a brown rice tank can be adjusted to about 7-13 degreeC, and water content can be raised 0.5 to 1%. Brown rice with the adjusted temperature is moistened by changing the temperature of about 3 ℃ by outside air in the milling factory during transportation to the rice mill by belt conveyor and bucket elevator. In addition, it is possible to maintain the temperature of the polished rice out of the rice polisher at 20-25 ° C throughout the year by adjusting the temperature of the blower blower to 13-18 ° C. Not only can it be reduced, but the water content of white rice is increased by 0.1 ~ 0.5%, so the overall yield is improved by 0.6 ~ 2.5%. In addition, it is possible to prevent the deterioration of quality due to condensation by adjusting the temperature of the white rice in the white rice tank with the air adjusted at a temperature of about 5 to 8 ° C. and a relative humidity of 70 to 95% in winter.

Claims (10)

Damper (14), inlet temperature sensor (24), blower (15), electric heater (16), indoor heating coil (2), intermediate temperature sensor (25), humidifier (17), from air inlet to air outlet The reheater 18 and the outlet temperature sensor 26 are arranged in sequence, while the four-way valve 7, the stop valves 45 and 46 and the heat transfer coil from the no-load compressor 1 equipped with the no-load solenoid valve 9. Air for temperature control of brown rice and white rice, characterized in that consisting of a refrigerant gas line leading to (2,3), a receiver 6, a filter (22, 23), a refrigerant liquid line connected to expansion valves (4, 5) Temperature controller A buffer tank (109) is provided from the air temperature adjusting device (102) to the brown rice tanks (61, 62, 63), the rice mills (76, 77), and the white rice tanks (93, 94). Damper 110 and six dampers (103, 104, 105, 106, 107, 108) are operated in sequence by the control panel 101 air temperature adjustment for the temperature control of brown rice and white rice having an air supply line, characterized in that Device The compressor (1) and the high temperature and high pressure of the evaporator according to claim 1, wherein the compressor (1) equipped with a damper (14), the no-load electromagnetic valve (9) and the evaporator are installed in order to adjust the cooling and heating capacity from 0 to 100% as the outdoor air temperature in the mill changes. Air temperature regulating device for adjusting the temperature of brown rice and white rice, characterized in that the electronic valve 38, the electric heater 16 for supplying gas With the air controlled by the air temperature adjusting device 102, the temperature of the brown rice being stored in the brown rice tanks 61, 62, and 63 is adjusted in the same manner, transferred to the belt conveyor 73 and the bucket elevator 74, and wetted by outside air. Product temperature adjustment method of brown rice, characterized in that the transfer to the rice mill 76, 77 in a state 5. The brown rice of claim 4, wherein the temperature of the brown rice is constantly adjusted by heating or cooling by adjusting the air temperature adjusted by the air temperature adjusting device 102 to 7 to 13 DEG C and 70 to 95%. How to adjust temperature 5. The method for adjusting the temperature of brown rice according to claim 4, wherein the temperature of brown rice is moistened by outside air during transportation and adjusted to 7 to 15 DEG C. The temperature control method of the white rice, characterized in that to maintain the product temperature of the rice by supplying the air adjusted in the air temperature control device 102 to the blower of the rice polisher (76, 77) 8. The rice of claim 7 wherein the temperature of the air is adjusted to 13 to 18 DEG C and the relative humidity is set to 75 to 95%, and the feed temperature is supplied to the blower to maintain the temperature of the rice at the rice mill outlet at 20 to 25 DEG C. How to adjust temperature 9. The method for adjusting the temperature of white rice according to claim 7 or 8, wherein the frictional heat is lowered and the moisture content of the rice is maintained or raised by air control. The air temperature adjusting device 102 supplies air adjusted to a temperature of 5 to 8 ° C. and a relative humidity of 75 to 95% so as to prevent condensation of the white rice tanks 93 and 94. White rice product temperature adjustment method