Direct-heating drying belt drying room all-in-one machine

Abstract

The invention relates to the technical field of dehumidification and drying, in particular to a direct-heating drying belt drying room all-in-one machine which is provided with a machine body, a feature extraction module, a feature analysis module and a control module, the machine body is provided with a drying room, a heat exchange cavity and a condensation cavity, and humidity parameters of the surface of a dehumidification evaporator are obtained through a humidity monitoring unit; flow parameters of gas entering a dehumidification evaporator are obtained through a flow monitoring unit, a humidity change curve is drawn through a characteristic analysis module, an operation efficiency abnormal interval section of the dehumidification evaporator is screened out, the abnormal category of the operation efficiency abnormal interval section is judged, an operation adjustment mode is selected through a control module, and then the humidity of the dehumidification evaporator is adjusted. The surface of the evaporator is monitored in real time and adaptively adjusted, and the dehumidification effect of the drying system and the reliability of equipment operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dehumidification and drying, and in particular to a direct-heat drying machine with a drying room. Background Art

[0002] With the continuous expansion of industrial production scale, the demand for material drying in large-scale production is getting higher and higher. It is necessary to integrate the drying equipment with the drying room. The air is directly heated by the heating element, and then the hot air is sent into the drying room to dry the material. This drying method can quickly increase the temperature in the drying room and shorten the drying time. With the continuous development of computer technology and automation technology, the control system of the direct heating drying room integrated machine is becoming more and more intelligent. By adopting advanced sensor technology and control algorithms, real-time monitoring and automatic control of the drying process can be achieved to improve the drying quality and production efficiency. However, the direct heating drying room integrated machine is a relatively complex system with multiple components working together. During long-term operation, there will be problems such as component failure and unstable system operation. The performance degradation or failure of key components such as compressors, evaporators, and condensers will affect the normal operation of the entire drying system and reduce the reliability and service life of the equipment. Therefore, during the operation of the direct heating drying room integrated machine, real-time monitoring of key components and adaptive adjustment of subsequent matching components are technical problems that need to be solved urgently.

[0003] For example, the Chinese patent application publication number: CN116576659A, the invention discloses a dryer dehumidification control method and dryer, which aims to solve the problem that the heat load of the internal dehumidification module of the existing dryer is greatly affected by the dehumidification requirements of different temperature sections, and a single refrigerant flow path is used to supply refrigerant to the internal dehumidification module, and the dehumidification capacity is limited. To this end, the dryer dehumidification control method of the invention includes: when the first refrigeration and heating cycle system enters the dehumidification mode, based on the result of comparing the difference T1 with the first preset difference and the second preset difference and the result of comparing the difference T2 with the third preset difference, the second refrigeration and heating cycle system is selectively controlled to enter one of the heating mode, dehumidification mode and off mode. The invention can select single-system dehumidification or dual-system dehumidification according to the amount of dehumidification, which helps to save resources.

[0004] The prior art still has the following problems:

[0005] The prior art does not take into account that during the operation of the direct heat drying machine with drying room, the condensation on the evaporator surface will affect the dehumidification effect of the evaporator. The prior art cannot monitor the evaporator surface in real time and adjust it adaptively, which affects the dehumidification effect and the normal operation of the entire drying system and reduces the reliability of the equipment. Summary of the invention

[0006] To this end, the present invention provides a direct-heat drying machine with a drying room, so as to overcome the problem in the prior art that the evaporator surface cannot be monitored in real time and adaptively adjusted during the operation of the drying machine.

[0007] To achieve the above object, the present invention provides a direct heat drying machine with drying room, comprising:

[0008] The machine body includes a drying chamber, a heat exchange chamber and a condensation chamber;

[0009] Wherein, the drying room is provided with a plurality of material tray racks for placing the materials to be dried;

[0010] The heat exchange chamber is provided with a core heat exchanger for exchanging heat with the gas, and a dehumidification evaporator for condensing the moisture in the gas into condensed water;

[0011] The condensing chamber is provided with a condenser for heating the gas, and a circulating fan for driving the gas to circulate in the body;

[0012] A feature extraction module, which is arranged in the heat exchange cavity, and includes a humidity monitoring unit for obtaining humidity parameters on the surface of the dehumidification evaporator and a flow monitoring unit for obtaining gas flow parameters entering the dehumidification evaporator;

[0013] a feature analysis module connected to the feature extraction module, for drawing a humidity change curve of the humidity parameter as the gas flow parameter changes, screening an abnormal operation effectiveness interval of the dehumidification evaporator according to the humidity change curve information, and determining an abnormal category of the abnormal operation effectiveness interval;

[0014] The humidity change curve information includes the slopes of several data points on the humidity change curve and the corresponding humidity;

[0015] A control module, which is connected to the characteristic analysis module and the heat exchange chamber, is used to select an operation adjustment mode based on the abnormality category, including:

[0016] adjusting the operating power of the circulation fan according to the slope corresponding to each data point in the abnormal operating efficiency interval;

[0017] Or, issue an abnormal alarm prompt.

[0018] Furthermore, the characteristic analysis module is used to draw a humidity change curve, wherein:

[0019] The characteristic analysis module obtains the humidity parameter of the surface of the dehumidification evaporator and the gas flow parameter entering the dehumidification evaporator;

[0020] A rectangular coordinate system is established with the gas flow parameter entering the dehumidification evaporator as the horizontal axis and the humidity on the surface of the dehumidification evaporator as the vertical axis.

[0021] Furthermore, the characteristic analysis module is used to divide the humidity change curve, wherein:

[0022] The humidity change curve is divided into a number of operating intervals at preset gas flow intervals; the number of data points whose slopes on the humidity change curve within the operating interval do not meet the operating stability condition is obtained, and the operating stability condition is that the slope of the data point does not exceed a preset slope threshold.

[0023] Furthermore, the characteristic analysis module is used to screen the abnormal operation efficiency interval of the dehumidification evaporator, wherein:

[0024] If the number of data points in the operation interval that do not meet the operation stability condition does not meet the normal operation effectiveness condition, the feature analysis module determines that the operation interval is an abnormal operation effectiveness interval;

[0025] If the number of data points in the operating interval that do not meet the normal operating effectiveness condition meets the normal operating effectiveness condition, the feature analysis module determines that the operating interval is not an abnormal operating effectiveness interval.

[0026] Furthermore, the normal operating effectiveness condition is that the number of data points in the operating interval that do not meet the operating stability condition accounts for the total number of data points in the operating interval that does not exceed a preset percentage threshold.

[0027] Furthermore, the feature analysis module is used to determine the abnormal category of the abnormal operation effectiveness interval, wherein:

[0028] If the humidity and gas flow values ​​corresponding to the data points in the abnormal operation effectiveness interval meet the explicit operation effectiveness condition, the feature analysis module determines that the abnormality category of the abnormal operation effectiveness interval is the explicit operation effectiveness abnormality category;

[0029] If the humidity and gas flow corresponding to the data points in the abnormal operation effectiveness interval do not meet the explicit operation effectiveness conditions, the feature analysis module determines that the abnormality category of the abnormal operation effectiveness interval is a non-explicit operation effectiveness abnormality category.

[0030] Furthermore, the operation effectiveness explicit condition is that the gas flow ranking and humidity ranking corresponding to the data points are the same;

[0031] The gas flow sorting is to sort the gas flow values ​​corresponding to the data points in the abnormal operation efficiency interval from small to large in the horizontal axis direction;

[0032] The humidity sorting is to sort the humidity corresponding to the data points from large to small in the vertical coordinate direction.

[0033] Furthermore, the control module is used to select an operation adjustment mode, wherein:

[0034] If the abnormality category is a non-obvious abnormality category of operation effectiveness, the control module selects an operation adjustment method to adjust the operation power of the circulation fan according to the slope corresponding to each data point in the abnormal operation effectiveness interval;

[0035] If the abnormality category is an operational effectiveness explicit abnormality category, the control module selects an operational adjustment method as issuing an abnormality alarm prompt.

[0036] Furthermore, the operating power of the circulating fan is negatively correlated with the efficiency characteristic value. The control module obtains the absolute value of the difference between the slope corresponding to each data point in the operating efficiency abnormal interval and the slope threshold, and determines the average value of the absolute value of the difference as the efficiency characteristic value.

[0037] Furthermore, the condensation chamber also includes an electric heating tube for heating the gas.

[0038] Compared with the prior art, the beneficial effects of the present invention lie in that the present invention is provided with a machine body, a feature extraction module, a feature analysis module, and a control module; the machine body is provided with a drying room, a heat exchange chamber, and a condensing chamber; the humidity parameters of the surface of the dehumidification evaporator are obtained through a humidity monitoring unit; the gas flow parameters entering the dehumidification evaporator are obtained through a flow monitoring unit; the humidity change curve is drawn through a feature analysis module; the abnormal operation effectiveness interval of the dehumidification evaporator is screened; and the abnormal category of the abnormal operation effectiveness interval is determined; the operation adjustment mode is selected through the control module, thereby realizing real-time monitoring of the evaporator surface and adaptive adjustment, thereby improving the dehumidification effect of the drying system and the reliability of equipment operation.

[0039] In particular, the present invention obtains the humidity parameters of the dehumidification evaporator and the gas flow parameters entering the dehumidification evaporator through a feature extraction module. It can be understood that when air flows through the dehumidification evaporator, water vapor will encounter cold on the surface of the dehumidification evaporator and condense into condensed water. In this process, the state of the dehumidification evaporator surface will change, and its humidity parameters will also change accordingly. When the condensed water forms a water film of a certain thickness on the surface of the dehumidification evaporator, this water film will affect the heat exchange between the dehumidification evaporator and the air like a thermal resistance. By obtaining the humidity parameters of the dehumidification evaporator, the degree of hindrance of the water film to the performance of the dehumidification evaporator can be monitored in real time. The gas flow entering the dehumidification evaporator is closely related to the dehumidification efficiency. Sufficient gas flow can ensure that more humid air is in contact with the evaporator, so that water vapor can fully condense on the surface of the evaporator. By obtaining the gas flow parameters, the gas circulation situation can be monitored in real time, and then, the real-time monitoring of the evaporator surface is realized, thereby improving the dehumidification effect of the drying system and the reliability of equipment operation.

[0040] In particular, the present invention determines the abnormal category of the abnormal operation effectiveness interval by means of a humidity change curve in which the humidity parameter changes with the gas flow parameter. It can be understood that when the humidity and gas flow corresponding to the data points in the abnormal operation effectiveness interval meet the explicit conditions of the operation effectiveness, the gas flow ranking corresponding to the data points in the abnormal operation effectiveness interval is the same as the humidity ranking, indicating that the accumulation of condensed water on the surface of the dehumidification evaporator continues to increase, and there is a major fault in the operation of the dehumidification evaporator. When the humidity and gas flow corresponding to the data points in the abnormal operation effectiveness interval do not meet the explicit conditions of the operation effectiveness, the gas flow ranking corresponding to the data points in the abnormal operation effectiveness interval is different from the humidity ranking, indicating that the accumulation of condensed water on the surface of the dehumidification evaporator is not continuous, and the influence of the current link can be compensated by adjusting the circulation rate of the gas in the device. Furthermore, real-time monitoring of the evaporator surface and adaptive adjustment are achieved, thereby improving the dehumidification effect of the drying system and the reliability of equipment operation.

[0041] In particular, the present invention adjusts its operation by adjusting the operating power of the circulating fan. It can be understood that when the power of the circulating fan is reduced, the flow rate of the gas in the device is slowed down, the time that the gas stays on the surface of the dehumidification evaporator will increase, and the gas has more time to exchange heat with the dehumidification evaporator, thereby reducing the influence of the water film formed by condensed water on the surface of the dehumidification evaporator on the heat exchange, and further, the real-time monitoring of the evaporator surface and adaptive adjustment are achieved, thereby improving the dehumidification effect of the drying system and the reliability of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic structural diagram of a direct heat drying machine with a drying room according to an embodiment of the present invention;

[0043] Figure 2 A logic flow chart of the feature analysis module of the embodiment of the present invention for screening the abnormal operation efficiency interval of the dehumidification evaporator;

[0044] In the figure: 1-electric heating tube; 2-evaporation and dehumidification fan; 3-dehumidification evaporator; 4-compressor; 5-circulation fan; 6-condenser; 7-material tray rack; 8-core heat exchanger; 9-insulation board; 10-air outlet; 11-air inlet; 12-material air shield door; 13-drying room. DETAILED DESCRIPTION

[0045] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0047] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0048] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] See also Figure 1 As shown, it is a schematic diagram of the structure of a direct-heat drying belt drying room integrated machine according to an embodiment of the present invention. A direct-heat drying belt drying room integrated machine according to the present invention comprises:

[0050] The machine body includes a drying chamber 13, a heat exchange chamber and a condensation chamber;

[0051] Wherein, the drying room 13 is provided with a plurality of material tray racks for placing materials to be dried;

[0052] The heat exchange chamber is provided with a core heat exchanger 8 for exchanging heat with the gas, and a dehumidification evaporator 3 for condensing the moisture in the gas into condensed water;

[0053] The condensing chamber is provided with a condenser 6 for heating the gas, and a circulation fan 5 for driving the gas to circulate in the body;

[0054] A feature extraction module, which is arranged in the heat exchange cavity, and includes a humidity monitoring unit for obtaining humidity parameters on the surface of the dehumidification evaporator and a flow monitoring unit for obtaining gas flow parameters entering the dehumidification evaporator 3;

[0055] Specifically, the present invention does not limit the specific structure of the humidity monitoring unit. Preferably, it can be a resistive humidity sensor, which uses the characteristic that the resistance value of the humidity-sensitive material changes with humidity to obtain the humidity parameters of the dehumidification evaporator surface, which will not be repeated here.

[0056] Specifically, the present invention does not limit the specific structure of the flow monitoring unit. Preferably, it can be a turbine flow meter, which obtains the gas flow information by detecting the speed at which the gas flows through the turbine blades to drive the turbine to rotate through the sensor, which will not be repeated here.

[0057] Specifically, the present invention obtains the humidity parameters of the dehumidification evaporator and the gas flow parameters entering the dehumidification evaporator through a feature extraction module. It can be understood that when air flows through the dehumidification evaporator, water vapor will encounter cold on the surface of the dehumidification evaporator and condense into condensed water. In this process, the state of the dehumidification evaporator surface will change, and its humidity parameters will also change accordingly. When the condensed water forms a water film of a certain thickness on the surface of the dehumidification evaporator, this water film will affect the heat exchange between the dehumidification evaporator and the air like a thermal resistance. By obtaining the humidity parameters of the dehumidification evaporator, the degree of obstruction of the water film to the performance of the dehumidification evaporator can be monitored in real time. The gas flow entering the dehumidification evaporator is closely related to the dehumidification efficiency. Sufficient gas flow can ensure that more humid air is in contact with the evaporator, so that water vapor can fully condense on the surface of the evaporator. By obtaining the gas flow parameters, the gas circulation situation can be monitored in real time, and then, the real-time monitoring of the evaporator surface is realized, thereby improving the dehumidification effect of the drying system and the reliability of equipment operation.

[0058] A feature analysis module, which is connected to the feature extraction module, and is used to draw a humidity change curve of the humidity parameter as the gas flow parameter changes, screen the abnormal operation effectiveness interval of the dehumidification evaporator 3 according to the humidity change curve information, and determine the abnormal category of the abnormal operation effectiveness interval;

[0059] The humidity change curve information includes the slopes of several data points on the humidity change curve and the corresponding humidity;

[0060] Specifically, the present invention does not limit the specific structure of the feature analysis module. Preferably, it can be constructed using logic components, which can be microprocessors and processors used in computers, etc., to draw humidity change curves and determine the abnormal category of abnormal operating efficiency intervals, which will not be repeated here.

[0061] A control module, which is connected to the characteristic analysis module and the heat exchange chamber, is used to select an operation adjustment mode based on the abnormality category, including:

[0062] adjusting the operating power of the circulation fan 5 according to the slope corresponding to each data point in the abnormal operating efficiency interval;

[0063] Or, issue an abnormal alarm prompt.

[0064] Specifically, the present invention does not limit the specific structure of the control module. Preferably, it can be constructed using logic components, which can be microprocessors and processors used in computers, etc., to select an operation adjustment method according to the abnormality category, which will not be repeated here.

[0065] Specifically, the body also includes a heat preservation plate 8 for maintaining the temperature inside the body, and an evaporative dehumidification fan 2 arranged on the side wall of the body for dehumidification;

[0066] A material air shield door 12 is arranged at the bottom of the drying room to block the hot air.

[0067] In the embodiment of the present invention, the insulation board 8 is made of a 50mm thick polyurethane insulation board. The 50mm thick polyurethane insulation board is used to enclose the space, reduce heat loss, and efficiently utilize heat energy. The condenser adopts a microchannel structure to improve thermal efficiency.

[0068] Specifically, the characteristic analysis module is used to draw a humidity change curve, wherein:

[0069] The characteristic analysis module obtains the humidity parameters on the surface of the dehumidification evaporator 3 and the gas flow parameters entering the dehumidification evaporator;

[0070] A rectangular coordinate system is established with the gas flow parameter entering the dehumidification evaporator as the horizontal axis and the humidity on the surface of the dehumidification evaporator as the vertical axis.

[0071] Specifically, the characteristic analysis module is used to divide the humidity change curve, wherein:

[0072] The humidity change curve is divided into a number of operating intervals at preset gas flow intervals; the number of data points whose slopes on the humidity change curve within the operating interval do not meet the operating stability condition is obtained, and the operating stability condition is that the slope of the data point does not exceed a preset slope threshold.

[0073] Preferably, the preset gas flow interval can be 150m 3 .

[0074] Specifically, the preset slope threshold may be set by those skilled in the art based on an average value of several historical data. Preferably, the slope threshold may be -1.

[0075] Specifically, see Figure 2 As shown, it is a logic flow chart of the characteristic analysis module of the embodiment of the present invention for screening the abnormal operation efficiency interval of the dehumidification evaporator. The characteristic analysis module is used to screen the abnormal operation efficiency interval of the dehumidification evaporator 3, wherein:

[0076] If the number of data points in the operation interval that do not meet the operation stability condition does not meet the normal operation effectiveness condition, the feature analysis module determines that the operation interval is an abnormal operation effectiveness interval;

[0077] If the number of data points in the operation interval that do not meet the operation stability condition meets the operation effectiveness normal condition, the feature analysis module determines that the operation interval is not an operation effectiveness abnormal interval.

[0078] Specifically, the normal operating effectiveness condition is that the proportion of the number of data points in the operating interval that do not meet the normal operating effectiveness condition to the total number of data points in the operating interval does not exceed a preset proportion threshold.

[0079] Specifically, the preset percentage threshold may be set by those skilled in the art based on an average value of several historical data. Preferably, the percentage threshold may be 0.6.

[0080] Specifically, the feature analysis module is used to determine the abnormal category of the abnormal operation effectiveness interval, wherein:

[0081] If the humidity and gas flow values ​​corresponding to the data points in the abnormal operation effectiveness interval meet the explicit operation effectiveness condition, the feature analysis module determines that the abnormality category of the abnormal operation effectiveness interval is the explicit operation effectiveness abnormality category;

[0082] If the humidity and gas flow corresponding to the data points in the abnormal operation effectiveness interval do not meet the explicit operation effectiveness conditions, the feature analysis module determines that the abnormality category of the abnormal operation effectiveness interval is a non-explicit operation effectiveness abnormality category.

[0083] Specifically, the operation effectiveness explicit condition is that the gas flow ranking and humidity ranking corresponding to the data points are the same;

[0084] The gas flow sorting is to sort the gas flow values ​​corresponding to the data points in the abnormal operation efficiency interval from small to large in the horizontal axis direction;

[0085] The humidity sorting is to sort the humidity corresponding to the data points from large to small in the vertical coordinate direction.

[0086] Specifically, the present invention determines the abnormal category of the abnormal operation effectiveness interval through the humidity change curve of the humidity parameter changing with the gas flow parameter. It can be understood that when the humidity and gas flow corresponding to the data points in the abnormal operation effectiveness interval meet the explicit conditions of the operation effectiveness, the gas flow ranking corresponding to the data points in the abnormal operation effectiveness interval is the same as the humidity ranking, indicating that the accumulation of condensed water on the surface of the dehumidification evaporator continues to increase, and there is a major fault in the operation of the dehumidification evaporator. When the humidity and gas flow corresponding to the data points in the abnormal operation effectiveness interval do not meet the explicit conditions of the operation effectiveness, the gas flow ranking corresponding to the data points in the abnormal operation effectiveness interval is different from the humidity ranking, indicating that the accumulation of condensed water on the surface of the dehumidification evaporator is not continuous, and the influence of the current link can be compensated by adjusting the circulation rate of the gas in the device. Then, real-time monitoring of the evaporator surface and adaptive adjustment are realized, thereby improving the dehumidification effect of the drying system and the reliability of equipment operation.

[0087] Specifically, the control module is used to select an operation adjustment mode, wherein:

[0088] If the abnormality category is a non-obvious abnormality category of operation effectiveness, the control module selects an operation adjustment method to adjust the operation power of the circulation fan 5 according to the slope corresponding to each data point in the abnormal operation effectiveness interval;

[0089] If the abnormality category is an operational effectiveness explicit abnormality category, the control module selects an operational adjustment method as issuing an abnormality alarm prompt.

[0090] Specifically, the present invention adjusts its operation by adjusting the operating power of the circulating fan. It can be understood that when the power of the circulating fan is reduced, the flow rate of the gas in the device is slowed down, and the time that the gas stays on the surface of the dehumidification evaporator will increase, and the gas has more time to exchange heat with the dehumidification evaporator, thereby reducing the influence of the water film formed by condensed water on the surface of the dehumidification evaporator on the heat exchange, and further, the real-time monitoring of the evaporator surface and adaptive adjustment are achieved, thereby improving the dehumidification effect of the drying system and the reliability of the equipment operation.

[0091] Specifically, the operating power of the circulating fan 5 is negatively correlated with the effectiveness characteristic value. The control module obtains the absolute value of the difference between the slope corresponding to each data point in the operating effectiveness abnormal interval and the slope threshold, and determines the average value of the absolute value of the difference as the effectiveness characteristic value.

[0092] Specifically, the condensation chamber also includes an electric heating tube 1 for heating the gas.

[0093] Specifically, the gas flow path of the embodiment of the present invention is that the gas enters the core heat exchanger 8 from the air inlet 11, enters the condenser 6 through the core heat exchanger 8, and is blown into the drying room 13 through the electric heating tube 1 by the circulating fan 5. The high-temperature gas heated by the electric heating tube 1 passes through the material tray rack 7 to dry the material. The high-temperature and high-humidity gas after absorbing the moisture of the material enters the core heat exchanger 8 from the air outlet 10 for heat exchange and waste heat recovery. After passing through the dehumidification evaporator 3, the moisture is discharged from the direct heating drying and drying room integrated machine through the evaporation and dehumidification fan 2. When changing materials, the material damper 12 is closed to avoid heat loss; the refrigerant gas enters the condenser 6 from the compressor 4, and enters the dehumidification evaporator 3 from the condenser 6, and repeats this cycle.

[0094] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0095] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A direct heat drying machine with drying room, characterized in that: include: The machine body includes a drying chamber, a heat exchange chamber and a condensation chamber; Wherein, the drying room is provided with a plurality of material tray racks for placing the materials to be dried; The heat exchange chamber is provided with a core heat exchanger for exchanging heat with the gas, and a dehumidification evaporator for condensing the moisture in the gas into condensed water; The condensing chamber is provided with a condenser for heating the gas, and a circulating fan for driving the gas to circulate in the body; A feature extraction module, which is arranged in the heat exchange cavity, and includes a humidity monitoring unit for obtaining humidity parameters on the surface of the dehumidification evaporator and a flow monitoring unit for obtaining gas flow parameters entering the dehumidification evaporator; A feature analysis module, which is connected to the feature extraction module, and is used to draw a humidity change curve of the humidity parameter as the gas flow parameter changes, screen the abnormal operation effectiveness interval of the dehumidification evaporator according to the humidity change curve information, and determine the abnormal category of the abnormal operation effectiveness interval; The humidity change curve information includes the slopes of several data points on the humidity change curve and the corresponding humidity; A control module, which is connected to the characteristic analysis module and the heat exchange chamber, is used to select an operation adjustment method based on the abnormality category, including: adjusting the operating power of the circulation fan according to the slope corresponding to each data point in the abnormal operating efficiency interval; Or, issue an abnormal alarm prompt.

2. The direct heat drying machine with drying room according to claim 1, characterized in that: The characteristic analysis module is used to draw a humidity change curve. in, The characteristic analysis module obtains the humidity parameter of the surface of the dehumidification evaporator and the gas flow parameter entering the dehumidification evaporator; A rectangular coordinate system is established with the gas flow parameter entering the dehumidification evaporator as the horizontal axis and the humidity on the surface of the dehumidification evaporator as the vertical axis.

3. The direct heat drying machine with drying room according to claim 2, characterized in that: The characteristic analysis module is used to divide the humidity change curve, wherein: The humidity change curve is divided into a number of operating intervals at a preset gas flow interval, and the number of data points whose slopes on the humidity change curve within the operating interval do not meet the operating stability condition is obtained, and the operating stability condition is that the slope of the data point does not exceed a preset slope threshold.

4. The direct heat drying machine with drying room according to claim 3, characterized in that: The characteristic analysis module is used to screen the abnormal operation efficiency interval of the dehumidification evaporator, wherein: If the number of data points in the operation interval that do not meet the operation stability condition does not meet the normal operation effectiveness condition, the feature analysis module determines that the operation interval is an abnormal operation effectiveness interval; If the number of data points in the operating interval that do not meet the normal operating effectiveness condition meets the normal operating effectiveness condition, the feature analysis module determines that the operating interval is not an abnormal operating effectiveness interval.

5. The direct heat drying machine with drying room as claimed in claim 4, characterized in that: The normal operating effectiveness condition is that the proportion of the number of data points in the operating interval that do not meet the operating stability condition to the total number of data points in the operating interval does not exceed a preset proportion threshold.

6. The direct heat drying machine with drying room as claimed in claim 5, characterized in that: The feature analysis module is used to determine the abnormal category of the abnormal operation effectiveness interval, wherein: If the humidity and gas flow values ​​corresponding to the data points in the abnormal operation effectiveness interval meet the explicit operation effectiveness condition, the feature analysis module determines that the abnormality category of the abnormal operation effectiveness interval is the explicit operation effectiveness abnormality category; If the humidity and gas flow corresponding to the data points in the abnormal operation effectiveness interval do not meet the explicit operation effectiveness conditions, the feature analysis module determines that the abnormality category of the abnormal operation effectiveness interval is a non-explicit operation effectiveness abnormality category.

7. The direct heat drying machine with drying room according to claim 6, characterized in that: The explicit condition for the operation effectiveness is that the gas flow ranking and humidity ranking corresponding to the data points are the same; The gas flow sorting is to sort the gas flow values ​​corresponding to the data points in the abnormal operation efficiency interval from small to large in the horizontal axis direction; The humidity sorting is to sort the humidity corresponding to the data points from large to small in the vertical coordinate direction.

8. The direct heat drying machine with drying room as claimed in claim 7, characterized in that: The control module is used to select an operation adjustment mode, wherein: If the abnormality category is a non-obvious abnormality category of operation effectiveness, the control module selects an operation adjustment method to adjust the operation power of the circulation fan according to the slope corresponding to each data point in the abnormal operation effectiveness interval; If the abnormality category is an operational effectiveness explicit abnormality category, the control module selects an operational adjustment method as issuing an abnormality alarm prompt.

9. The direct heat drying machine with drying room according to claim 8, characterized in that: The operating power of the circulating fan is negatively correlated with the effectiveness characteristic value. The control module obtains the absolute value of the difference between the slope corresponding to each data point in the operating effectiveness abnormal interval and the slope threshold, and determines the average value of the absolute value of the difference as the effectiveness characteristic value.

10. The direct heat drying machine with drying room according to claim 1, characterized in that: The condensation chamber also includes an electric heating tube for heating the gas.

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