KR101930882B1 - Apparatus for drying organic waste - Google Patents

Abstract

The present invention relates to a device for drying organic waste. The device for drying organic waste determines a completion condition in accordance with a temperature difference of a first element providing evaporation atmosphere after a dry motion is started by a user and a second element reflecting an evaporation state and correcting the completion condition for drying organic waste in a desired moisture content in accordance with the moisture content value which the user inputs. Therefore, the device for drying organic waste improves operation efficiency by automatically completing the dry motion at a time corresponding to the completion condition. The device for drying organic waste comprises: a setting value input unit (13) in which the user can input the value of the moisture content; a temperature difference detecting unit (14) detecting the temperature difference of the second element reflecting the evaporation state and the first element providing the evaporation atmosphere of a dry chamber; a completion condition setting unit (15) determining the completion condition in accordance with the temperature difference of a stabilization time zone; a completion condition correction unit (16) correcting the completion condition in accordance with the input moisture content; and a driver (12) automatically completing the dry motion in accordance with the completion condition.

Description

[0001] APPARATUS FOR DRYING ORGANIC WASTE [0002]

The present invention is characterized in that after the start of a drying operation by a user, an end condition is determined according to a temperature difference between a first element that provides an evaporative atmosphere and a second element that reflects an evaporative state, To an end condition for drying with a moisture content, and automatically terminating a drying operation at a time point that meets the end condition, thereby improving the operating efficiency.

The dryer 20 used for treating organic wastes is configured such that the organic waste 24 is put into the drying chamber 23 through the inlet 21 and heated by the heating source 24 Thereby evaporating moisture contained in the organic waste 24. [

The air in the drying chamber 23 is circulated through the circulation duct 40 via the condenser 30 outside the dryer 20 so that the water vapor generated by the evaporation is discharged through the condenser 30 as condensed water do.

Such a drying device is often used to dry and reduce food waste.

Such a drying operation is performed by a heating operation of the heating source 24, an air circulation operation of the circulation duct 40 and a dehumidification operation of the condenser 30 in accordance with the operation of the switch 11 and the switch 11 that the user turns on and off And is terminated in accordance with the off operation after being started in accordance with the on operation. Then, the dried organic wastes 24 are discharged, and the organic wastes 24 to be dried are supplied to carry out the drying operation again.

Here, the heating source 24 uses a large amount of heat medium oil. A filling space is formed in the lower part of the drying chamber 23 and a heating source 24 is filled in the filling space so that the drying chamber 23 is heated by the heating source 24 as shown in FIG. The heating source 24 filled in the filling space circulates through the boiler 24a and is heated to a predetermined temperature. The heater 24b is installed in the filling space to operate the electric heater 24b for directly heating the heating source 24, (23) to the target temperature. Only the boiler 24a may be provided without the electric heater 24b in order to match the heating temperature to the target temperature or only the electric heater 24b may be provided without the boiler 24a, The drying chamber 23 may be directly heated by the electric heater 24b without the heater 24. Alternatively, the drying air to be injected into the drying chamber 23 through the circulation duct 40 may be heated by a heating means such as an electric heater or a boiler to heat the organic drying waste 25 in the drying chamber 23 with hot air.

However, in order to heat the organic waste 25 in the drying chamber 23 regardless of the heating method, much energy is consumed for heating. Therefore, in order to reduce the consumption energy, the drying operation is stopped , The operating time of the drying apparatus and the operating cost.

10-0613663 discloses a method of controlling the amount of heat generated by the heater 24a in accordance with the temperature of the heating source 24 and the temperature change characteristics of the temperature inside the heating chamber 23, Thereby reducing the supply heat source and enabling the drying operation to be performed.

In addition, Japanese Patent Application Laid-Open No. 10-2008-0068400 determines the completion of drying according to the temperature inside the drying chamber and the temperature of the steam pipe, and controls the drying operation.

However, the water content of the organic waste to be added is different depending on the place where the organic waste is discharged, and the condenser 30, which is usually constructed by air-cooling, is influenced by the ambient temperature depending on the season or installation environment. It is also difficult to judge the completion of drying because the temperature change graph shows various patterns.

Due to such a practical difficulty, when the amount of supplied heat is controlled according to the characteristic of temperature change, the operation efficiency may be lowered due to excessive drying, and the moisture content of the dried organic waste may be severely deviated.

KR 10-0613663 B1 2006.08.10. 10-2008-0068400 A 2008.07.23.

Accordingly, an object of the present invention is to provide an organic waste drying apparatus which is convenient to operate by simplifying the setting for obtaining a target moisture content, can improve the operating efficiency by reducing the supply heat source while drying organic wastes at a target moisture content .

In order to achieve the above object, the present invention is characterized in that organic wastes are introduced into a drying chamber of a dryer (20), heated, circulated in a drying room (40) through a condenser (30) And the drying operation by the dehumidification of the condenser 30 and the circulation of air in the circulation duct 40 is performed to the controller 10 by the dehumidification of the condenser 30, Wherein the controller (10) comprises: a setpoint input unit (13) for receiving a value of a water content; A temperature difference detecting unit for detecting a temperature of a first element that provides an evaporation atmosphere of the drying chamber and a temperature of a second element that reflects a state of evaporation by the temperature sensors 51 and 52 to detect a temperature difference between the first element and the second element; (14); An end condition setting unit (15) for setting a temperature difference obtained by multiplying a temperature difference of a preset stabilization time zone by a predetermined application ratio after the start of a drying operation as an end condition; An end condition correction unit (16) for correcting an end condition based on a correction rate preset according to an input moisture content, when the water content is input to the set value input unit (13); And the drying operation is started and terminated by controlling the operation of the dryer 20, the circulation duct 40 and the condenser 30. The termination of the drying operation is performed by the driver (12), and automatically terminates according to the termination condition after the start of the drying operation.

According to an embodiment of the present invention, the water content received by the set value input unit 13 is the water content of the organic waste after drying, and the end condition correction unit 16 determines whether the input water content is the predetermined reference water content The correction ratio is applied so that the interval between the temperature difference of the stabilization time period and the termination condition is proportional to the input moisture content without modifying the condition.

According to the embodiment of the present invention, the water content received by the set value input unit 13 is the water content of the organic waste to be dried, and the end condition corrector 16 determines whether the input water content is the predetermined reference water content, The correction ratio is applied so that the interval between the temperature difference and the termination condition in the stabilization time zone is inversely proportional to the input moisture content.

According to the embodiment of the present invention, the termination condition corrector 16 applies a correction ratio for each interval of the water content divided by the magnitude of the input water content.

According to the embodiment of the present invention, the stabilization time zone, the application ratio, the correction ratio, and the reference moisture content are inputted to the set value input unit 13 and set.

According to an embodiment of the present invention, the termination condition setting unit 15 sets the lower limit application ratio of less than 1 and the upper limit application ratio of more than 1 to the lower limit termination condition having a value less than the temperature difference of the stabilization time period The upper limit termination condition exceeding the temperature difference of the stabilization time period is set and the driver 12 stops the drying operation when the temperature difference comes to any one of the lower limit termination condition and the upper limit termination condition.

According to the embodiment of the present invention, the termination condition setting unit 15 sets the application ratio of the lower limit application ratio of less than 1 and the upper application ratio of more than 1 to the temperature difference maximum value of the stabilization time period and multiplies the upper application ratio And the upper limit termination condition exceeding the temperature difference in the stabilization time period is determined by multiplying the minimum temperature difference value in the stabilization time period by the lower limit application ratio, The lower limit termination condition and the upper limit termination condition are met.

According to the embodiment of the present invention, the temperature difference detection unit 14 obtains the difference of the temperature difference detected in the preset time difference as an absolute value, and sets the temperature difference speed as the temperature difference speed. The time difference can be set by the user through the set value input unit 13 The termination condition setting unit 15 sets a termination condition to a value obtained by multiplying the maximum value by the application ratio after obtaining the maximum value of the temperature difference speed in the stabilization time period, Controls the drying operation to stop when the end condition is reached.

According to an embodiment of the present invention, the first element is air after dehumidification that flows into the dryer 20 after passing through the condenser 30, and the second element is air in the dryer (20) ) Before dehumidification.

According to an embodiment of the present invention, the first element is air after dehumidification immediately after passing through the condenser 30, and the second element is air before dehumidification immediately before being introduced into the condenser 30, 20) before dehumidification.

According to an embodiment of the present invention, the first element is a heat source for applying heat to the drying object in the dryer 20, and the second element is a drying object dried in the drying chamber of the dryer 20.

According to the present invention configured as described above, the first and second elements that reflect the dry state are adapted to the state or the drying environment of the organic wastes according to the temperature difference, and the shutdown conditions are first determined. Then, By precisely and precisely modifying the organic wastes, the organic wastes can be dried to have a desired moisture content, thereby stopping the drying operation at a desired moisture content and improving the operating efficiency.

In addition, the present invention according to an embodiment is convenient to use because the end condition can be precisely corrected only by inputting the water content.

In addition, the present invention according to one embodiment can be easily dried at a desired water content even if various first and second elements are applied.

1 is a schematic view of a conventional organic waste drying apparatus.
2 is a schematic structural view of an organic waste drying apparatus according to a first embodiment of the present invention;
FIG. 3 is a graph of the temperature detected by the temperature sensors 51 and 52 when the automatic termination is not performed according to the first embodiment of the present invention.
4 is a graph of the temperature detected by the temperature sensors 51 and 52 when the end condition is set only by the detected temperature difference in the first embodiment of the present invention.
5 is a graph of the temperature detected by the temperature sensors 51 and 52 when the automatic termination is not performed in various drying environments.
6 is a graph showing a temperature difference for explaining a method of correcting an end condition based on a user input moisture ratio in the first embodiment of the present invention.
7 is a view for explaining the stabilization temperature difference determined in the stabilization time period in the organic waste drying apparatus according to the third embodiment of the present invention.
8 is a view for explaining a temperature difference speed as an end condition in the organic waste drying apparatus according to the fourth embodiment of the present invention.
FIG. 9 is a configuration diagram of an organic waste drying apparatus according to a fifth embodiment of the present invention; FIG.
10 is a configuration diagram of an organic waste drying apparatus according to a sixth embodiment of the present invention.
11 is a configuration diagram of an organic waste drying apparatus according to a seventh embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

<First Embodiment of Present Invention>

2, the apparatus for drying organic wastes according to the first embodiment of the present invention includes a dryer 20, a condenser 30, a circulation duct 40, temperature sensors 51 and 52, And the controller 10. The dryer 20, the condenser 30 and the circulation duct 40 are constituent elements employed in the conventional drying apparatus mentioned in the background art, and thus the present invention is clearly understood The configuration of the controller 10 using the temperature sensors 51 and 52 and the control process for the automatic termination will be described in detail.

The drying unit 20 is configured such that the organic waste 25 is introduced into the drying chamber 23 through the inlet 21 while the discharge port 22 is closed and then the drying chamber 23 is heated by the heating source 24, An inlet 26 for injecting the dry air into the drying chamber 23 and an exhaust port 27 for exhausting the wet air in the drying chamber 23 are provided to evaporate the moisture contained in the condenser 30, To be connected to the piping. Although not shown in the drawing, means for crushing and stirring the organic waste 25 charged into the drying chamber 23 may be provided.

The heating source 24 may be a heating medium unique as illustrated in FIG. The heating source 24 is filled in the dryer 20 so that the drying chamber 23 can be heated and then heated by the boiler 24a to be supplied to the dryer 20 and then heated by the electric heater 24b It can be heated to the target temperature. As a method for heating the heating source 24 to the target temperature, a method of using only the boiler 24a without the electric heater 24b, a method of using only the electric heater 24b without the boiler 24a There is also a way. As another method, a method of directly heating the drying chamber 23 with the electric heater 24b without the heating source 24 and a method of heating the drying air to be injected into the drying chamber 23 through the inlet 26 into an electric heater, And heating the organic waste by hot air to heat the organic waste. That is, the heating means including the heating source 24, the boiler 24a, and the electric heater 24b illustrated in FIG. 2 can be used to heat the organic waste 25 introduced into the drying chamber 23, Or may be replaced with heating means of various types or various types.

Here, the heating operation by the heating source 24 is controlled by the controller 10.

The dried organic wastes 25 are discharged through the discharge port 22. The organic wastes to be dried are charged again and the drying process is repeated. Thus, the heating operation of the heating source 24 is controlled in accordance with the completion of drying.

The circulation duct 40 sucks the wet air in the drying chamber 23 through the exhaust port 27 of the dryer 20 to pass through the condenser 30 and then passes through the inlet 26 of the dryer 20, (23), thereby allowing water vapor of the humidified air to be discharged into the condensed water by heat exchange of the condenser (30). Thus, the dry air can be continuously injected into the drying chamber 23 through the injection port 26 of the dryer 20, thereby continuously maintaining the drying atmosphere in the drying chamber 23.

Since various kinds of foreign substances discharged from the organic waste 25 are mixed with water vapor evaporated in the wet air of the drying chamber 23 exhausted through the exhaust port 27, the end portion connected to the exhaust port 27 in the circulation duct 40 A second filter 42 is provided in the middle of the pipe connected to the condenser 30 to filter the foreign matter that is not filtered by the first filter 41 and remains, do.

A blower 43 is installed on the pipe connecting the condenser 30 and the inlet port 26 of the dryer 20 to circulate the air. This is because the installation position of the blower 43 is to blow out the low temperature air rather than the high temperature air to reduce the deterioration of the blower 43 due to the heat.

By constituting the circulation duct 40 in this manner, it is possible to prevent environmental pollution caused by odors generated in the organic waste 25. [

The condenser 30 is a condenser for cooling the dehumidified air drawn in the drying chamber 23 to dehumidify the dehumidified air and then injecting it into the drying chamber 23 with dry air.

The condenser 30 generally employs an air-cooling type in which water vapor of the humidified air is condensed by cooling the flow tube by blowing the outside air toward the flow tube (not shown) via humid air. Of course, an outlet is also provided for discharging the condensed water generated in the flow pipe. As another example, a heat radiating plate cooled by a fan may be provided so that the water vapor of the humid air passing through the heat radiating plate is condensed so that the condensed water is condensed in the lower part of the heat radiating plate and then discharged to the outside.

Here, the structure of the air-cooled condenser is well known, and a detailed description thereof will be omitted.

However, in order to understand the present invention, it should be noted that the use of the air-cooled condenser should be considered.

The condenser 30 should be capable of stably supplying the dry air by cooling the humidified air taken in the drying chamber 23 to a uniform temperature. However, by adopting the air-cooling type, The drying degree and the temperature of the drying air to be injected into the drying chamber 23 are influenced by the change of the external temperature of the installation environment and accordingly the drying atmosphere of the drying chamber 23 fluctuates according to the outside air temperature So that the temperature change characteristic to be detected and used is also influenced. Accordingly, it is difficult to specify the end point of the drying operation to be determined based on the temperature change characteristics.

For example, the dryer 20 and the circulation duct 40 are also influenced by the outside air temperature, so that the end point is specified according to the temperature conversion characteristics .

On the contrary, the present invention constitutes the controller 10 so that the target moisture content can be adjusted easily and accurately in response to the change of the temperature change characteristic sensed by the temperature sensors 51 and 52.

The temperature sensors 51 and 52 include a first temperature sensor 51 for measuring the temperature of the first element that provides the evaporation atmosphere in the drying chamber 23 and a second temperature sensor 51 for measuring the moisture evaporation state of the organic waste 26 in the evaporation atmosphere And a second temperature sensor 52 for measuring the temperature of the reflecting second element.

The evaporation atmosphere in the drying chamber 23 is an atmosphere in which the moisture of the organic waste 26 charged into the drying chamber 23 is evaporated well. Thus, the first element providing such an evaporative atmosphere may be a heating source 24 for heating dry air or organic waste 26 to be injected into the drying chamber 23 through the inlet 26.

The moisture evaporation state of the organic waste 26 is a state indicating how well moisture is evaporating. Thus, the second element reflecting the moisture evaporation state may be wet air discharged through the exhaust port 27 or the organic waste 25 being dried.

According to the first embodiment of the present invention, the first temperature sensor 51 is installed to measure the temperature with the dry air immediately after passing through the condenser 30 as the first element, Is used to measure the temperature with the wet air immediately before passing through the condenser (30) as the second element.

That is, the following temperature difference detecting section 14 detects the air temperature difference before and after dehumidification by the condenser 30.

Here, the temperatures measured by the first temperature sensor 51 and the second temperature sensor 52 are dry bulb temperatures.

The first temperature sensor 51 detects the temperature of the first temperature sensor 51 and the temperature of the second temperature sensor 52 in the case where the controller 10 does not automatically stop the operation of the controller 10 to automatically stop the drying operation according to the first temperature sensor 51 and the second temperature sensor 52, And the temperature detected by the second temperature sensor 52 will first be described with reference to FIG.

3 is a graph of the temperature detected by the temperature sensors 51 and 52 when not automatically terminated according to the present invention. That is, it shows the temperature graph when the drying operation is continued for a while after stopping the drying operation even after reaching the proper water content. Here, the dehumidifying operation of the condenser 30 is first stopped, and the heating operation of the dryer 20 is stopped after a predetermined time. This is because the residual heat of the condenser 30 can be used even if the condenser 30 is stopped , The blower 43 of the circulation duct 40 may be stopped at the same time when the heating operation is stopped. Such an operation stopping method can also be applied when the controller 10 automatically stops the operation.

The temperature change of the humidified air temperature T2 measured by the second temperature sensor 52 follows the temperature change of the humidified air discharged to the exhaust port 27 in accordance with the drying state of the organic waste 25 in the drying chamber 23. [

At this time, the humid air temperature T2 rises at the initial expected state? T_1 and thereafter the cooling and dehumidifying state of the phychrometric chart as the drying progresses with the help of the condenser 30 (Δt_2) and gradually decreases, and it is in a transitional state (Δt_3) in which the rate of decrease is increased when the amount of steam generated is sufficiently dried and the amount of reduction in the relative humidity is remarkably small or does not decrease any more The heating and dehumidifying state (? T-4) is reached at the point of time, and an increasing pattern is shown. That is, a transient state? T_3 occurs in which the temperature inflection point 1 appears when transitioning from the cooling humidity state? T_2 to the heating humidity state? T_4.

The temperature change of the dry air temperature T1 measured by the first temperature sensor 51 gradually rises in the initial preheating state Δt_1 and the temperature of the cooling air humidity state Δt_2, the transient state Δt_3, In the state [Delta] t_4, the overall decreasing pattern is maintained.

Thus, the temperature difference? T between the humidified air temperature T2 and the dry air temperature T1 maintains a substantially constant value in the cooling humidity state? T_2 after a rapid rise in the initial expected state? T_1, (Δt_3) and then rise again in the heating state (Δt_4).

Therefore, as shown in Fig. 3, when the drying operation is stopped after the inflection point 1 of the transient state? T_3, the drying operation is stopped at the transition state? T_3 or at the beginning of the heating humidity state? T_4 Is a way to increase the operating efficiency.

Hereinafter, the controller 10 for automatically terminating the drying operation to improve the operation efficiency will be described with reference to FIGS. 4 to 6. FIG.

4 is a graph of the temperature detected by the temperature sensors 51 and 52 when the end condition is set only by the detected temperature difference in the first embodiment of the present invention.

FIG. 5 is a graph of the temperature detected by the temperature sensors 51 and 52 when the drying environment is not automatically terminated in a state different from that in FIG.

6 is a temperature difference graph for explaining a method of correcting the termination condition based on the user input water content in the first embodiment of the present invention.

The controller 10 includes a driver (not shown) for on / off control of the drying operation including a heating operation of the dryer 20, a dehumidification operation of the condenser 30, and an air circulation operation of the circulation duct 40 12, and a switch 11 for causing the drying operation to be manually started by the switching operation of the user.

After the start of the drying operation by the switch 11, the controller 10 sets the end conditions (T_low, T_high) in the stabilization time period (t) to be set to an appropriate one of the cooling humidity state (t_2) (T'_low, T'_high) in accordance with the value of the moisture content inputted by the user, thereby setting the termination condition according to various drying conditions and terminating the drying degree to the target value only by inputting a simple water content A temperature difference detecting unit 14, a termination condition setting unit 15, and a termination condition correcting unit 16, in order to enable the correction of the condition.

When the driver 12 of the controller 10 controls the drying operation to be automatically stopped based on the termination condition, if the termination condition is detected in the transient condition? T_3, the drying operation is stopped (T_3) to stop the drying operation at the moment when the end condition is sensed by detecting the end condition at the beginning of the heating sensation state (t_4) even if the control operation for the transient state The control operation is automatically started so that the drying operation is automatically stopped at the optimum time, if possible, even if the temperature difference ΔT appears in various patterns depending on the drying environment.

Hereinafter, the components of the controller 10 will be described in detail.

The driver 12 controls the drying operation of the dryer 20, the dehumidifying operation of the condenser 30 and the air circulation operation of the circulation duct 40 by separately controlling the dryer 20, the condenser 30 and the circulation duct 40 According to the embodiment of the present invention, it is possible to control each of the operations to be started by the switch 11, and to automatically start the operation according to the end condition received from the end condition correcting unit 16 Each operation is stopped to be controlled.

According to a specific embodiment of the present invention, it is possible to control the boiler 24a and the electric heater 24b for the start and end of the heating operation, to control the pen of the condenser 30 for the start and end of the dehumidifying operation, And controls the blower 43 for starting and ending the circulation operation. For example, it can be controlled through power-on and power-off, and is a commonly used component, so a detailed description will be omitted. In the above description, the boiler 24a and the electric heater 24b for heating the heating source 24 are controlled. However, as described above with reference to the heating source 24, When the organic waste 25 of the drying chamber 23 is heated by the heating means employed in the various heating means employed in the heating means, it is necessary to start and end the heating operation in a control method suitable for the adopted heating means.

The set value input unit 13 is provided for receiving a value of a moisture content from a user.

In the first embodiment of the present invention, the input moisture content input by the user through the set value input unit 13 is a moisture content immediately before drying, which indicates the moisture content of the organic waste 25 discharged after being put in immediately before drying.

In the meantime, in the first embodiment of the present invention, the set value inputting unit 13 sets or changes the stabilization time period? T, the application ratio R_high, R_low, the reference moisture content and the correction ratios r_high and r_low I will use it.

As shown in FIG. 4, the stabilization time period? T is determined and set when the temperature difference? T is in a cooling humidity (? T_2) state in which a stable value is maintained, The heating temperature of the heating source 24, the dehumidifying ability of the condenser 30, and the like. However, the drying operation according to the present invention can be determined empirically by repeatedly operating the drying apparatus.

The application rate R_high, R_low is set to be divided into an upper application ratio R_high having a value greater than 1 and a lower application ratio R_low having a value less than 1. As shown in FIG. 4, the set application ratio R_high, R_low is used as a value for primarily determining the end conditions (T_high, T_low) based on the temperature difference in the stabilization time zone.

The reference moisture content is a target value of the water content of the organic waste to be dried and discharged by the drying apparatus according to the present invention, and is a moisture content of 15% which permits a predetermined error range when the organic waste is food waste. That is, the drying apparatus according to the first embodiment of the present invention may be an apparatus for drying to have a reference moisture content.

The correction ratios r_high and r_low are set for each moisture content interval divided according to the magnitude of the moisture content so that the correction rate values of the intervals to which the moisture content inputted through the setting value input unit 13 belongs can be adopted and used.

The correction ratios r_high and r_low at this time are determined and set according to the difference between the representative value (for example, intermediate value) of the moisture content section and the reference moisture content.

6, the correction rate r_high, r_low is used to determine an end condition (T'_high, T'_low) obtained by modifying the end condition (T_high, T_low) defined by the application ratio (R_high, R_low) Is used.

Since the application ratios R_high and R_low are divided into the lower limit application ratio R_low and the upper limit application ratio R_high, the correction ratios r_high and r_low set for each interval of the moisture content are also divided into the lower limit correction ratio r_low and the upper limit correction ratio (r_high).

Tables 1 and 2 below illustrate, by way of example, stabilization time zones, application rates, reference moisture contents, and correction ratios set for a drying apparatus actually operated by the applicant of the present invention.

Stabilization time (hr) Application rate 4 to 6 Upper application ratio (R_high) Lower limit application ratio (R_low) 1.20 0.80

Standard moisture content
(%) Moisture fraction
(Application interval of water content after drying just before)
(%) Correction ratio Application rate x correction rate maximum
Correction ratio
(r_high) Lower limit
Correction ratio
(r_low) Upper limit application rate
x
Upper limit correction ratio Lower limit application rate
x
Lower limit correction ratio 15 ± 1.5
(13.5 to 16.5) Greater than 25.0 1.15 0.85 1.38 0.68 20.0 ~ 25.0 1.10 0.90 0.32 0.72 Above 16.5 ~ 20.0 1.05 0.95 1.26 0.76 13.5 ~ 16.5 One One 1.20 0.80 10.0 ~ less than 13.5 0.95 1.05 1.14 0.84 5.0 or higher to less than 10.0 0.90 1.10 1.08 0.88 Less than 5.0 0.85 1.15 1.02 0.92

As shown in Table 2, the lower limit obtained by multiplying the upper limit application rate by the upper limit correction rate and the lower limit application rate by the lower limit correction rate is equal to the application rate when the water content of the reference water content rate is input .

However, as the input moisture content (i.e., water content after drying) is higher than the reference moisture content, the upper limit value becomes larger, the lower limit value becomes smaller, and the interval between the upper limit value and the lower limit value becomes larger. In this case, the operation time is relatively increased as described later, and the drying moisture content is reduced.

Also, as the input moisture content is lower than the reference moisture content, the upper limit value becomes smaller and the lower limit value becomes larger, so that the interval between the upper limit value and the lower limit value becomes smaller. In this case, the operation time is relatively decreased as described later, and the drying moisture content is increased.

In any case, the upper limit value is larger than the reference value 1, and the lower limit value is smaller than the reference value 1.

Accordingly, as described later, the upper limit condition larger than the stabilization temperature difference T_th and the lower limit condition smaller than the stabilization temperature difference T_th can be determined on the basis of the stabilization temperature difference T_th obtained in the stabilization time zone, By adjusting the interval between the lower limit conditions, the operation time can be adjusted and the target moisture content can be adjusted.

In this manner, the set value inputting unit 13 sets the stabilization time period? T, the application rates R_high and R_low, the reference moisture content and the correction ratios r_high and r_low in advance, And is input to the set value input unit 13. Of course, the water content input can be omitted, in which case it is not necessary to modify the end condition applying the correction ratio or the water content previously applied is applied as it is.

The switch 11 is connected to a user's operation device for allowing the user to turn on the drying operation including the heating operation of the dryer 20, the dehumidifying operation of the condenser 30, and the air circulation operation of the circulation duct 40. [ The switch may not be provided with a switch for turning off the drying operation, but may be provided for emergency stop.

The heating operation of the dryer 20 is performed by the boiler 24a, but the present invention is not limited thereto, and the heating operation of the dryer For example, when the heating source 24 filled in the dryer 20 is heated by a heater (not shown), the heating operation of the dryer 20 is performed by a heater (not shown).

The heating operation of the dryer 20, the dehumidifying operation of the condenser 30, and the air circulation operation of the circulation duct 40 may be prepared so as to start with a time interval for improving the efficiency, but as another example, 12 may start at predetermined intervals and time intervals.

The temperature difference detecting unit 14 detects the temperature T1 of the first element measured by the first temperature sensor 51 and the temperature T1 of the first element measured by the second temperature sensor 52 after the drying operation is started by the switch 11. [ (? T) between the first and second elements, which is the difference between the temperature (T2) of one second element.

The detected temperature difference? T is used when the end condition is set in the termination condition setting unit 15 and when the driver 12 stops the drying operation according to the termination condition.

The end condition setting unit 15 receives the temperature difference ΔT detected in the stabilization time period Δt after the drying operation is started by the switch 11 from the temperature difference detecting unit 14 and stabilizes the average value of the temperature difference (T_high, T_low) is set by multiplying the stabilization temperature difference (T_th) by the application ratio (R_high, R_low) after setting the temperature difference to T_th.

4, the application ratio R_high, R_low is divided into a lower limit application ratio R_low of less than 1 and an upper limit application ratio R_high of more than 1, so that the lower limit application ratio (T_th) is multiplied by an upper application ratio (R_high) by multiplying the stabilization temperature difference (T_th) by a lower limit termination condition (T_low), which is a value smaller than the stabilization temperature difference (T_th) (T_high, T_low), which are divided into an upper limit termination condition (T_high) which is an upper limit termination condition (T_high).

Accordingly, the driver 12 can control the drying operation to stop at any one of the upper limit termination condition (T_high) and the lower limit termination condition (T_low).

Referring to the graph illustrated in FIG. 4, since the lower limit end condition T_low is first reached in the transition state? T_3, the drying operation can be stopped.

As shown in FIG. 5, referring to the graph of the temperature difference (? T) between the first and second elements showing various patterns depending on the initial moisture content and the ambient temperature of the organic waste introduced into the drying environment, the lower limit termination condition T_low may not be sensed. In this case, the upper limit termination condition may be sensed in the heating sensation state (t_4) to stop the drying operation.

However, when the drying environment such as the initial organic wastage water content, the organic wastes input amount and the outside air temperature are different, the value of the stabilization temperature difference T_th obtained during the stabilization time period also changes, and the termination condition determined according to the stabilization temperature difference T_th It is possible to determine the termination condition by obtaining the stabilization temperature difference T_th varying depending on the drying environment, but it is possible to determine the application ratio for ensuring that the drying is performed at the desired reference moisture content as the drying environment varies variously In fact, even when the drying apparatus was actually operated, it frequently occurred that it was not dried at the reference moisture content.

Accordingly, in the first embodiment of the present invention, the user can input the moisture content of the organic waste immediately before and the end condition modifier 16 can modify the end condition according to the input moisture content.

The termination condition correcting unit 16 receives the lower limit termination condition T_low and the upper limit termination condition T_high set by the termination condition setting unit 15 and receives the moisture content in the setting value input unit 13 (R_high, r_low) corresponding to the water content is applied to the driver 12 after correcting the lower limit termination condition T_low and the upper limit termination condition T_high.

6, the termination condition correcting unit 16 selects a correction rate of a section to which the input moisture content belongs in the correction ratio set for each of the moisture ratio sections shown in Table 2, and then sets the lower limit termination condition (T_low) (T_high) by multiplying the upper limit correction rate r_high by the upper limit termination condition T_high to obtain the modified upper limit termination condition T'_high .

Here, the input moisture content is the organic wastewater moisture content after drying in the previous drying operation performed prior to the current drying operation, and the correction ratio is set as shown in Table 2. Thus, when the input moisture content is the reference moisture content, It is determined without modification, but the interval between the stabilization temperature difference and the end condition after correction is proportional to the input moisture content.

That is, the correction upper limit end condition T'_high greater than the stabilization temperature difference T_th and the lower limit end condition T'_low lower than the stabilization temperature difference T_th are set to the stabilization temperature difference T_th), and there is a difference between the stabilization temperature difference (T_th) and the interval obtained by applying only the application ratio without applying the correction ratio in the middle.

In the case of FIG. 6, when the input water content is higher than the reference moisture content, the modified lower limit termination condition T'_low becomes smaller than the lower limit lower limit term T_low and the upper limit termination condition T'_high after modification is corrected (T_high), and the interval between the end conditions after the modification is larger than that before the modification. Accordingly, the drying operation end point 2 'corresponding to the lower limit end condition after modification appears after the point of time 2 before the correction, and the drying operation end point 3' ), The time required for the drying operation becomes longer than before the modification, so that the moisture content after drying can be lowered.

Here, the reason why the upper limit end condition T'_high after correction is made larger than the upper limit end condition T_high before correction is that the lower limit end condition may not be detected as illustrated in FIG.

On the other hand, when the moisture content is not input for the current drying operation, the organic waste is dried at the reference moisture content by applying the last termination condition to the current drying operation. Therefore, the correction ratio The same applies to the current drying operation.

In other words, the correction ratio corresponding to the inputted moisture content is stored in the memory, and is used again in the drying operation thereafter.

In this case, when the water content is input, the correction rate corresponding to the currently inputted water content rate is multiplied by the previous correction ratio, and the results are shown in Table 2 It is preferable to make it possible to gradually adjust to the reference moisture content by repeating the drying operation by using and storing the correction correction ratio different from the set correction value. However, the restriction that the value obtained by multiplying the upper limit correction ratio by the upper limit application ratio and the lower limit correction rate multiplied by the lower limit application ratio during the correction ratio should be less than 1 do. For this purpose, it is advisable to select the correction ratio value to be set for each section of the input moisture content, or to limit the range of the correction correction ratio value so as to be in the limitation.

However, if it is possible to obtain a correction ratio capable of adjusting the reference moisture content within the tolerance range by only one input of the moisture content based on the data obtained by repeating the drying operation with the same drying apparatus, the above correction correction ratio may not be used will be.

&Lt; Second Embodiment of the Present Invention >

A drying apparatus according to a second embodiment of the present invention will be described.

In the second embodiment, the moisture content received through the set value input unit 13 is a target moisture content indicating how much moisture content of the organic waste 25 that is currently input is to be dried.

That is, the desired moisture content after drying is set as the reference moisture content, but the target value can be inputted by the user to the setting value input section 13 and changed.

The correction ratio for this can be set as shown in Table 3 below.

Standard moisture content
(%) Input moisture fraction
(Target water content)
(%) Correction ratio Application rate x correction rate maximum
correction
ratio Lower limit
correction
ratio Upper limit application rate
x
Upper limit correction ratio Lower limit application rate
x
Lower limit correction ratio 15 ± 1.5
(13.5 to 16.5) Greater than 25.0 0.85 1.15 1.02 0.92 20.0 ~ 25.0 0.90 1.10 1.08 0.88 Above 16.5 ~ 20.0 0.95 1.05 1.14 0.84 13.5 ~ 16.5 One One 1.20 0.80 10.0 ~ less than 13.5 1.05 0.95 1.26 0.76 5.0 or higher to less than 10.0 1.10 0.90 1.32 0.72 Less than 5.0 1.15 0.85 1.38 0.68

Referring to Table 3, it is the same as the correction ratio in Table 2 that the upper limit correction ratio and the lower limit correction ratio are set to 1 so that the input condition is included in the interval of the reference moisture content.

However, if the input moisture content does not belong to the interval of the reference moisture content, and the input moisture content belongs to a section longer than the reference moisture content section or belongs to a small section, the interval between the stabilization temperature difference and the termination condition is inversely proportional to the input moisture content Modify the termination condition to

By modifying the termination condition in this way, the larger the input moisture content, the shorter the time required for the drying operation. As shown in FIG. 6, for example, when the deviation of the end condition based on the stabilization temperature difference is increased after the end condition is corrected as compared with that before the end condition is corrected, when the input water content is smaller than the reference water content .

&Lt; Third Embodiment of the Present Invention &

7 is a diagram for explaining that the stabilization temperature difference determined in the stabilization time period can be set to the minimum value and the maximum value.

7, the end condition setting unit 15 obtains the minimum value T_th1 and the maximum value T_th2 of the temperature difference ΔT detected in the stabilization time period Δt as the stabilization temperature difference, and then sets the minimum value T_th1 ) To the lower limit application ratio R_low to obtain the lower limit termination condition T_low and multiplies the maximum value T_th2 by the upper application ratio R_high to obtain the upper limit termination condition T_high.

Of course, the lower limit termination condition T_low may be lower than the minimum value T_th1, the upper limit termination condition T_high may be greater than the maximum value T_th2, and the lower limit termination condition modified by the termination condition corrector 16 may be the minimum value T_th1), and the application ratio and the correction ratio should be set such that the upper limit termination condition is also greater than the maximum value (T_th2).

The application ratio here can be made different from the application ratio of the first and second embodiments as long as the minimum value T_th1 and the maximum value T_th2 are used instead of the average value T_th of the stabilization time period Δt.

On the other hand, the temperature difference minimum value T_th1 and the maximum value T_th2 of the stabilization time period? T can be averaged over a predetermined range to reduce the influence of noise. For example, the average value of the lower 10% is set as the minimum value and the average value of the upper 10% is set as the maximum value in the range of the detected temperature difference.

By setting the lower limit termination condition T_low and the upper limit termination condition T_high according to the minimum value T_th1 and the maximum value T_th2, the lower limit termination condition T_low reflecting the temperature difference variation of the stabilization time period Δt, The end condition (T_high) can be obtained.

&Lt; Fourth Embodiment of Present Invention &

8 is a view for explaining a temperature difference speed as an end condition in the organic waste drying apparatus according to the fourth embodiment of the present invention.

In the fourth embodiment of the present invention, the application ratio is set as a single application ratio (R), not divided into the lower application ratio and the upper application ratio, and the correction ratio is not divided into the lower limit correction ratio and the upper limit correction ratio And a single correction ratio (r) is set for each moisture content section.

The temperature difference detector 14 acquires the variation width of the temperature difference DELTA T with the preset time difference DELTA a as the temperature difference DELTA b1, DELTA b2, DELTA b3.

Here, only three values are shown in Fig. 8 as the values obtained by the absolute values of the difference in temperature difference detected between the temperature difference velocities DELTA b1, DELTA b2 and DELTA b3 at both ends of the preset time difference DELTA a, And is actually obtained continuously in intervals smaller than the preset time difference DELTA a.

Of course, it is preferable that the temperature difference velocities? B1,? B2,? B3 are normalized by dividing the difference in temperature difference detected by the preset time difference by the predetermined time difference? A obtained by the absolute value.

The termination condition setting unit 15 receives the temperature difference speeds? B1,? B2 and? B3 of the stabilization time period? T and multiplies the maximum value by the application ratio R to obtain a termination condition T_high).

The termination condition correcting unit 16 multiplies the termination condition T_high obtained by the termination condition setting unit 15 by the correction ratio r to obtain a modified termination condition T'_high.

That is, the termination condition is obtained not by dividing the lower limit termination condition and the upper limit term condition but by a single value.

The driver 12 receives the temperature difference speed after the stabilization time period? T and compares it with the termination condition, and controls the drying operation to stop when the temperature difference speed reaches the termination condition.

However, as illustrated in Fig. 8, only the temperature difference detected at both ends of the preset time difference DELTA a is reflected in the temperature difference velocities DELTA b1, DELTA b2, and DELTA b3, and the temperature difference detected in the middle is not reflected , It is possible to reduce the influence of noise on the temperature difference graph as compared with the case of obtaining by the slope.

On the other hand, if the predetermined time difference DELTA a is made too large, the drying operation is stopped by the predetermined time difference DELTA a, and if the predetermined time difference DELTA a is made too small, And the temperature difference speed obtained in the transient state or the heating and humidity state are not well distinguished.

The preset time difference DELTA a can be directly set by the user through the set value input unit 13. [ According to the drying apparatus operated by the inventor of the present invention, it has been determined that the predetermined time difference DELTA a is set to 20 minutes, but it may vary depending on the drying environment or the drying ability of the drying apparatus, It is preferable to set it appropriately based on the data obtained by the above.

<Fifth and Sixth Embodiments of the Present Invention>

9 is a configuration diagram of an organic waste drying apparatus according to a fifth embodiment of the present invention.

10 is a configuration diagram of an organic waste drying apparatus according to a sixth embodiment of the present invention.

9, the first temperature sensor 51 is disposed at a position immediately after passing through the condenser 30 in the circulation conduit 40, so that the dehumidified dry air immediately after passing through the condenser 30 And the second temperature sensor 52 is installed at a position connected to the exhaust port 27 of the dryer 20 in the circulation duct 40 so that the wet air just after leaving the dryer 20 is supplied to the second Element.

However, it is preferable that the second temperature sensor 52 detects the temperature of the humidified air after passing through the first filter 41.

In contrast to the first embodiment, the second temperature sensor 52 is the same in that it detects the temperature of the humidified air, but the temperature of the humidified air that is not affected by the channel between the dryer 20 and the condenser 30 Can be detected.

10, the first temperature sensor 51 is installed at a position connected to the inlet port 26 of the dryer 20 in the circulation duct 40, passes through the condenser 30, The second temperature sensor 52 is installed at a position connected to the exhaust port 27 of the dryer 20 in the circulation duct 40 so that the air dry air immediately before being injected into the drying chamber 23 is the first element, The wet air immediately after leaving the drying chamber (23) of the dryer (20) is referred to as a second element.

In this case, the first temperature sensor 51 detects the temperature of the dry air similarly to the first embodiment, but can detect the temperature of the dry air more accurately reflecting the evaporative atmosphere of the drying chamber. Further, although not shown in the drawings, when the dry air is heated to a certain amount of heat per hour before being injected into the dryer 20, the temperature of the dry air in the heated state is detected.

However, as a result of operating the drying apparatus operated by the applicant of the present invention, even if the temperature detection position of the dry air and the temperature detection position of the wet air are changed as in the fifth and sixth embodiments, an appropriate end condition can be obtained according to the temperature difference .

<Seventh embodiment of the present invention>

11 is a configuration diagram of an organic waste drying apparatus according to a seventh embodiment of the present invention.

Referring to FIG. 11, the first temperature sensor 51 detects the temperature of the heat source that applies heat to the laundry, using the heating source 24 as a first element, and the second temperature sensor 52 is charged into the drying chamber The temperature of the organic waste 25 is detected using the organic waste 25 to be heated as the second element.

For example, the second temperature sensor 52 may comprise an optical temperature sensor.

Also in this case, it was confirmed that an appropriate termination condition can be obtained according to the temperature difference.

Even if the first element that provides the evaporation atmosphere of the drying chamber or the second element that reflects the water evaporation state of the organic waste is changed to be different from that of the first embodiment as in the fifth, sixth, and seventh embodiments of the present invention, It is possible to obtain a termination condition adapted to the pattern change of the temperature difference that varies according to the drying environment and to allow the user to secondarily correct the termination condition, The organic waste can be dried at the desired moisture content, since the end conditions for drying are precisely obtained.

In the description of the present invention, the structure of the description denoting "it is preferable" or "may be" may be regarded as another embodiment.

In addition, a component of the controller 10 means a unit for processing at least one function or operation, which may be implemented by hardware or software, or a combination of hardware and software, and may be implemented by combining two or more components It will be apparent to those skilled in the art that the present invention can be implemented in hardware, software, or a combination of hardware and software in order to perform each function sequentially.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, . &Lt; / RTI &gt; Accordingly, modifications of the embodiments of the present invention should be considered to fall within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

10: Controller
11: Switch 12: Driver
13: set value input section 14: temperature difference detecting section
15: end condition setting unit 16: end condition correcting unit
20: dryer
21: inlet 22: outlet
23: drying chamber 24: heating source
25: organic waste 26: inlet
27: Exhaust
30: Capacitor
40: circulation duct
41, 42: filter 43: blower
51, 52: Temperature sensor

Claims (11)

The organic waste is introduced into the drying chamber of the dryer 20 and then heated so as to circulate the drying room air through the circulation line 40 via the condenser 30 so that the water vapor generated by the evaporation of the moisture of the organic waste is introduced into the condenser 30 The drying operation by the heating of the dryer (20), the air circulation of the circulation duct (40) and the dehumidification of the condenser (30) is controlled by the controller (10)
The controller (10)
A setting value input unit 13 for inputting a value of a moisture content;
A temperature difference detecting unit for detecting a temperature of a first element that provides an evaporation atmosphere of the drying chamber and a temperature of a second element that reflects a state of evaporation by the temperature sensors 51 and 52 to detect a temperature difference between the first element and the second element; (14);
An end condition setting unit (15) for setting a temperature difference obtained by multiplying a temperature difference of a preset stabilization time zone by a predetermined application ratio after the start of a drying operation as an end condition;
An end condition correction unit (16) for correcting an end condition based on a correction rate preset according to an input moisture content, when the water content is input to the set value input unit (13); And
The drying operation is started and terminated by controlling the operation of the dryer 20, the circulation duct 40 and the condenser 30, and the end of the drying operation is performed by a driver (not shown) 12);
And automatically terminates according to the termination condition after the start of the drying operation,
The termination condition setting unit 15 sets the lower limit application ratio of less than 1 and the upper limit application ratio of more than 1 as the application rate and sets the upper limit term exceeding the temperature difference between the lower limit termination condition having a value lower than the temperature difference in the stabilization time period and the stabilization time period Termination conditions,
Wherein the driver (12) controls the drying operation to be stopped when the temperature difference reaches any one of the lower limit termination condition and the upper limit termination condition. The method according to claim 1,
The water content input to the set value input unit 13 is the water content of the organic waste after drying,
The termination condition correcting unit 16 applies the correction ratio so that the termination condition is not modified when the input water content rate is the predetermined reference water content ratio but the interval between the temperature difference and the termination condition in the stabilization time zone is proportional to the input water content, . The method according to claim 1,
The water content input to the set value input unit 13 is a water content of the organic waste to be dried,
The termination condition correcting unit 16 applies the correction ratio so that the termination condition is not modified when the input water content rate is the predetermined reference water content ratio but the interval between the temperature difference and the termination condition in the stabilization time zone is inversely proportional to the input water content, . The method according to claim 1,
Wherein the termination condition correcting unit (16) applies a correction ratio for each section of the moisture content divided by the magnitude of the input moisture content. 4. The method according to any one of claims 1 to 3,
Wherein the stabilization time zone, the application ratio, the correction ratio, and the reference moisture content are input to the set value input unit (13). delete The method according to claim 1,
The termination condition setting unit 15 sets the lower limit application ratio of less than 1 and the upper limit application ratio of more than 1 as the application rate and multiplies the temperature difference maximum value of the stabilization time period by the upper application ratio, And the upper limit termination condition exceeding the temperature difference in the stabilization time period is determined,
Wherein the driver (12) controls the drying operation to be stopped when the temperature difference reaches any one of the lower limit termination condition and the upper limit termination condition. delete The method according to claim 1,
The first element is air after dehumidification that flows into the dryer (20) after passing through the condenser (30), and the second element is air after dehumidification which flows into the condenser (30) Organic waste drying apparatus. The method according to claim 1,
Wherein the first element is air after dehumidification immediately after passing through the condenser 30 and the second element is air before dehumidification immediately before being introduced into the condenser 30 and before dehumidification The organic waste drying device is made into any one of air. The method according to claim 1,
Wherein the first element is a heat source for applying heat to the object to be dried in the dryer (20), and the second element is an object to be dried in a drying chamber of the dryer (20).

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