Material drying room based on positive and negative circulation

Abstract

The utility model relates to the technical field of drying equipment, and discloses a material drying room based on positive and negative circulation, which comprises a drying chamber, a partition plate is arranged in an inner cavity of the drying chamber, and the drying chamber is divided into a first chamber and a second chamber by the partition plate; a ventilation opening communicated with the first chamber and the second chamber is formed between the partition plate and the inner wall of the drying chamber; the first ventilation channel is arranged at the position, corresponding to the first cavity, of the drying chamber; the second ventilation channel is arranged at the position, corresponding to the second cavity, of the drying chamber; the circulating fan is connected with the first ventilation channel or the second ventilation channel and used for inputting drying airflow into the drying chamber. Directional flow switching of a drying medium between the separated chambers is achieved by constructing a reversible airflow path, and materials in the double chambers are alternately located in an airflow priority action area in cooperation with a positive and negative rotation control strategy of the circulating fan, so that the overall drying uniformity is remarkably improved while the advantage of low cost of a single-fan system is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to drying equipment technical field, concretely relates to a material drying room based on positive and negative circulation. BACKGROUND

[0002] Traditional material drying equipment adopts single chamber structure or simple separation multi-chamber layout, and the hot air circulation path is usually in one-way fixed mode, which leads to significant gradient difference in airflow distribution during the drying process, the material close to the air inlet is quickly dehydrated due to the preferential contact with high-temperature drying airflow, and the material far from the air inlet is caused by airflow temperature attenuation and humidity saturation effect, which leads to a sharp drop in drying efficiency. This uneven drying phenomenon not only causes energy waste, but also easily causes material property damage caused by local overheating.

[0003] Although the prior art attempts to improve airflow uniformity by increasing auxiliary fans or complex air duct systems, the multi-fan parallel scheme significantly increases the equipment manufacturing cost and energy consumption, and the complex air duct structure has inherent defects such as airflow interference and difficult maintenance. The method of simply relying on prolonging the drying time to compensate for the drying difference will also lead to a decrease in production efficiency. INVENTION CONTENTS

[0004] Therefore, the utility model provides a material drying room based on positive and negative circulation, which can significantly improve the overall drying uniformity while maintaining the low-cost advantage of a single fan system.

[0005] To achieve the above technical effects, the utility model provides a material drying room based on positive and negative circulation, which comprises:

[0006] The drying chamber has a partition plate in the inner cavity, which divides the drying chamber into a first chamber and a second chamber; the first chamber and the second chamber are respectively used to provide a drying site for the material to be dried, and a ventilation opening is provided between the partition plate and the inner wall of the drying chamber to communicate the first chamber and the second chamber.

[0007] The first ventilation channel is arranged at the corresponding position of the drying chamber in the first chamber.

[0008] The second ventilation channel is arranged at the corresponding position of the drying chamber in the second chamber.

[0009] The circulating fan is connected with the first ventilation channel or the second ventilation channel, and is used to input the drying airflow into the drying chamber.

[0010] Further, the first ventilation channel and the second ventilation channel are respectively communicated with a supply and exhaust cavity, and the supply and exhaust cavity is provided with an air inlet and an air outlet; the air inlet is used for being communicated with an air source of the drying airflow, and a first one-way valve for allowing the drying airflow to enter the supply and exhaust cavity is arranged at the air inlet; the air outlet is communicated with the outside atmosphere, and a second one-way valve for allowing the airflow in the supply and exhaust cavity to be discharged to the outside atmosphere is arranged at the air outlet.

[0011] Further, a controller, a temperature sensor and a humidity sensor are arranged in the drying chamber or the supply and exhaust cavity, and the controller is used for controlling the opening or closing of the first one-way valve or the second one-way valve according to the measurement data of the temperature sensor or the humidity sensor.

[0012] Further, a guide rail is arranged in the supply and exhaust cavity, and the circulating fan is installed in the supply and exhaust cavity through the guide rail; the guide rail is used for guiding the circulating fan to a position communicated with the first ventilation channel or the second ventilation channel.

[0013] Further, a mixing cavity is arranged, and a fresh air inlet is arranged on the mixing cavity and communicated with the outside atmosphere; the air inlet is communicated with the mixing cavity; a return air channel is further arranged on the mixing cavity, and the mixing cavity is communicated with the supply and exhaust cavity through the return air channel.

[0014] Further, a heat pump is arranged, and a condenser of the heat pump is used for heating the airflow input into the air inlet, and an evaporator of the heat pump is used for condensing and dehumidifying the airflow input into the air outlet.

[0015] Further, the partition plate is vertically arranged, and a movable trolley is arranged in the first chamber and the second chamber of the drying chamber, and the drying chamber is further provided with a movable door plate for allowing the movable trolley to enter or exit the drying chamber.

[0016] Further, the first ventilation channel and the second ventilation channel are arranged on the side wall of the drying chamber opposite to the movable door plate; one end of the partition plate is fixed to the side wall of the drying chamber between the first ventilation channel and the second ventilation channel, and the other end of the partition plate extends to a position close to the movable door plate, and a reserved gap is arranged between the partition plate and the movable door plate, so as to form the ventilation opening.

[0017] Compared with the prior art, the utility model has the beneficial effects that: the utility model realizes the directional flow switching of the drying medium between the separated chambers through the construction of the reversible airflow path, and cooperates with the forward and reverse control strategy of the circulating fan, so that the double-chamber materials are alternately placed in the airflow preferential action area, thereby maintaining the low-cost advantage of the single-fan system while significantly improving the overall drying uniformity. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art based on these drawings without creative effort shall fall within the scope of the present application.

[0019] Figure 1 Structure diagram of the material drying room based on positive and negative circulation in the embodiments;

[0020] 1, drying chamber; 101, first chamber; 102, second chamber; 2, partition; 3, ventilation opening; 4, first ventilation channel; 5, second ventilation channel; 6, circulating fan; 7, air supply and exhaust chamber; 701, air inlet; 702, air outlet; 8, first one-way valve; 9, second one-way valve; 10, guide rail; 11, air mixing chamber; 12, fresh air inlet; 13, return air channel; 14, condenser; 15, evaporator; 16, movable door plate; 17, movable trolley. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in detail below with reference to the drawings.

[0022] The embodiments of the present application are described below through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are only some of the embodiments of the present application, not all. The present application can also be implemented or applied through other different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort shall fall within the scope of the present application.

[0023] EMBODIMENT

[0024] Reference Figure 1 A material drying room based on positive and negative circulation, comprising:

[0025] A drying chamber 1, an inner cavity of the drying chamber 1 is provided with a partition 2, the partition 2 divides the drying chamber 1 into a first chamber 101 and a second chamber 102; the first chamber 101 and the second chamber 102 are respectively used to provide a drying site for the material to be dried, and a ventilation opening 3 communicating the first chamber 101 and the second chamber 102 is arranged between the partition 2 and the inner wall of the drying chamber 1;

[0026] The first ventilation channel 4 is arranged at the position corresponding to the drying chamber 1 of the first chamber 101.

[0027] The second ventilation channel 5 is arranged at the position corresponding to the drying chamber 1 of the second chamber 102.

[0028] The circulating fan 6 is connected with the first ventilation channel 4 or the second ventilation channel 5, and is used for inputting the drying airflow into the drying chamber 1.

[0029] In the embodiment, the drying chamber 1 is divided into the first chamber 101 and the second chamber 102 by the partition plate 2, the ventilation opening 3 is arranged between the first chamber 101 and the second chamber 102, and the circulating fan 6 is installed at one position of the first ventilation channel 4 or the second ventilation channel 5. The embodiment takes the case that the circulating fan 6 is installed at the first ventilation channel 4 as an example. During the working process of the circulating fan 6, the drying airflow enters the first chamber 101 through the first ventilation channel 4 first, then enters the second chamber 102 through the ventilation opening 3, and then is discharged from the second ventilation channel 5. In this process, the material to be dried in the first chamber 101 receives the drying airflow first, and the drying rate is relatively fast. When it is necessary to balance the drying rate of the materials to be dried in the two chambers, it is only necessary to control the circulating fan 6 to reverse. At this time, the drying airflow enters the second chamber 102 through the second ventilation channel 5 first, then enters the first chamber 101 through the ventilation opening 3, and then is discharged from the first ventilation channel 4. The material drying room based on the forward and reverse circulation of the embodiment can realize the reversible directional flow of the drying airflow between the double chambers. Especially, the forward and reverse rotation periods can be preset by the PLC control system, or the circulation direction can be automatically switched according to the change of the material moisture content, so that the material in the second chamber 102 obtains the drying intensity equivalent to that of the first chamber 101 in the reverse circulation stage, and the problems of local overheating and uneven airflow distribution existing in the traditional single-channel drying equipment are effectively solved.

[0030] The material drying room based on the forward and reverse circulation in the embodiment further comprises a supply and exhaust cavity 7, the first ventilation channel 4 and the second ventilation channel 5 are communicated with the supply and exhaust cavity 7 respectively, and the supply and exhaust cavity 7 is provided with an air inlet 701 and an air outlet 702; the air inlet 701 is used for being communicated with a gas source of the drying airflow, and the air inlet 701 is provided with a first one-way valve 8 for the drying airflow to enter the supply and exhaust cavity 7; the air outlet 702 is communicated with the external atmosphere, and the air outlet 702 is provided with a second one-way valve 9 for the airflow in the supply and exhaust cavity 7 to be discharged to the external atmosphere. In work, the first one-way valve 8 is opened first, the high-temperature and low-humidity hot airflow is input into the supply and exhaust cavity 7 as the drying airflow, the first one-way valve 8 and the second one-way valve 9 are closed at the same time in the working process of the circulating fan 6, the circulation of the drying airflow in the supply and exhaust cavity and the drying chamber 1 is realized, and when the humidity of the airflow in the drying chamber 1 or the supply and exhaust channel reaches a preset humidity value, the first one-way valve 8 and the second one-way valve 9 are opened at the same time, the high-temperature and high-humidity airflow is discharged to the atmosphere at the same time as the new high-temperature drying airflow is introduced from the air inlet 701, and the heat of the drying airflow can be better utilized. In this way, the air intake and air exhaust can be intermittent, and the drying operation of the material to be dried can be completed. In the embodiment, a controller, a temperature sensor and a humidity sensor are further included, the temperature sensor and the humidity sensor are arranged in the drying chamber 1 or the supply and exhaust cavity 7 respectively, and the controller is used for controlling the opening or closing of the first one-way valve 8 or the second one-way valve 9 according to the measurement data of the temperature sensor or the humidity sensor.

[0031] Regarding the wind direction control of the circulating fan 6, one is to realize by switching the forward and reverse rotation of the circulating fan 6 as described above, and the other is to arrange a guide rail 10 in the supply and exhaust cavity 7, and the circulating fan 6 is installed in the supply and exhaust cavity 7 through the guide rail 10; the guide rail 10 is used for guiding the circulating fan 6 to a position communicated with the first ventilation channel 4 or the second ventilation channel 5, the forward position of the circulating fan 6 is switched to face the first ventilation channel 4 or the second ventilation channel 5, the wind direction switching in the first chamber 101 and the second chamber 102 is realized, and the forward or reverse rotation of the circulating fan 6 is not needed, and the continuous and stable operation of the circulating fan 6 is ensured.

[0032] The material drying room based on the positive and negative circulation in the embodiment further comprises a mixed air chamber 11, a fresh air inlet 12 is arranged on the mixed air chamber 11, the fresh air inlet 12 is communicated with the atmosphere, the air inlet 701 is communicated with the mixed air chamber 11, a return air passage 13 is further arranged on the mixed air chamber 11, and the mixed air chamber 11 is communicated with the air supply and exhaust chamber 7 through the return air passage 13. In the process of opening the second one-way valve 9 to exhaust, part of the high-temperature and high-humidity air flow also enters the mixed air chamber 11 through the return air passage 13, after the external fresh air is introduced through the fresh air inlet 12, the external fresh air and the return air are mixed in the mixed air chamber 11, the high-temperature and low-humidity air flow is sent into the drying chamber 1 by the circulating fan 6, the drying of the material is realized, and the heat utilization efficiency can be improved.

[0033] The material drying room based on the positive and negative circulation in the embodiment further comprises a heat pump, a condenser 14 of the heat pump is used for heating the air flow input into the air inlet 701, and an evaporator 15 of the heat pump is used for condensing and dehumidifying the air flow entering the air outlet 702. The condenser 14 in the embodiment can be arranged at the fresh air inlet 12, and the evaporator 15 can be arranged at the air outlet 702. Other installation modes capable of realizing the heating of fresh air and the condensing and dehumidifying of the exhaust air flow are also applicable to the utility model.

[0034] In the embodiment, the partition plate 2 is vertically arranged, the movable trolley 17 is arranged in the first chamber 101 and the second chamber 102 of the drying chamber 1, and the movable trolley 17 is arranged to be movable in and out of the drying chamber 1. The movable trolley 17 facilitates the feeding of the material to be dried into the drying chamber 1 and the removal of the dried material, and the working efficiency is improved. The design of the movable door plate 16 makes the movable trolley 17 more convenient to move in and out, and ensures the sealing of the drying chamber 1, so that the heat loss in the drying process is avoided.

[0035] In the embodiment, the first ventilation passage 4 and the second ventilation passage 5 are arranged on the side wall of the drying chamber 1 opposite to the movable door plate 16, one end of the partition plate 2 is fixed to the side wall of the drying chamber 1 between the first ventilation passage 4 and the second ventilation passage 5, the other end of the partition plate 2 extends to a position close to the movable door plate 16, and a reserved gap is arranged between the partition plate 2 and the movable door plate 16 to form the ventilation opening 3. The air flow can smoothly pass through the ventilation opening 3 when circulating between the first chamber 101 and the second chamber 102. The size of the reserved gap can be adjusted according to actual needs to ensure the smoothness of the air flow and the stability of the drying effect.

[0036] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A material drying chamber based on forward and reverse circulation, characterized in that, include: A drying chamber (1) is provided with a partition (2) in its inner cavity, which divides the drying chamber (1) into a first chamber (101) and a second chamber (102). The first chamber (101) and the second chamber (102) are respectively used to provide a drying space for the materials to be dried. A ventilation opening (3) connecting the first chamber (101) and the second chamber (102) is provided between the partition (2) and the inner wall of the drying chamber (1). The first ventilation channel (4) is located at the position of the drying chamber (1) corresponding to the first chamber (101); The second ventilation channel (5) is located at the position of the drying chamber (1) corresponding to the second chamber (102); A circulating fan (6) is connected to a first ventilation channel (4) or a second ventilation channel (5) for inputting drying airflow into the drying chamber (1).

2. The material drying chamber based on forward and reverse circulation according to claim 1, characterized in that, It also includes a supply and exhaust air chamber (7), the first ventilation channel (4) and the second ventilation channel (5) are respectively connected to the supply and exhaust air chamber (7), the supply and exhaust air chamber (7) is provided with an air inlet (701) and an air outlet (702); the air inlet (701) is used to connect with the air source of the drying airflow, and a first one-way valve (8) is provided at the air inlet (701) to allow the drying airflow to enter the supply and exhaust air chamber (7); the exhaust air outlet (702) is connected to the outside atmosphere, and a second one-way valve (9) is provided at the exhaust air outlet (702) to allow the airflow in the supply and exhaust air chamber (7) to be discharged to the outside atmosphere.

3. The material drying chamber based on forward and reverse circulation according to claim 2, characterized in that, It also includes a controller, a temperature sensor and a humidity sensor. The temperature sensor and the humidity sensor are respectively installed in the drying chamber (1) or the air supply and exhaust chamber (7). The controller is used to control the opening or closing of the first one-way valve (8) or the second one-way valve (9) according to the measurement data of the temperature sensor or the humidity sensor.

4. The material drying room based on forward and reverse circulation according to claim 2, characterized in that, The air supply and exhaust chamber (7) is provided with a guide rail (10), and the circulating fan (6) is installed in the air supply and exhaust chamber (7) through the guide rail (10); the guide rail (10) is used to guide the circulating fan (6) to a position that communicates with the first ventilation channel (4) or the second ventilation channel (5).

5. The material drying chamber based on forward and reverse circulation according to claim 2, characterized in that, It also includes a mixing chamber (11), on which a fresh air inlet (12) is provided, the fresh air inlet (12) is connected to the atmosphere, and the air inlet (701) is connected to the mixing chamber (11); the mixing chamber (11) is also provided with a return air channel (13), and the mixing chamber (11) and the supply and exhaust air chamber (7) are connected through the return air channel (13).

6. The material drying chamber based on forward and reverse circulation according to claim 2, characterized in that, It also includes a heat pump, the condenser (14) of which is used to heat the airflow entering the air inlet (701), and the evaporator (15) of which is used to condense and dehumidify the airflow entering the air outlet (702).

7. The material drying chamber based on forward and reverse circulation according to claim 1, characterized in that, The partition (2) is arranged vertically. The first chamber (101) and the second chamber (102) of the drying chamber (1) are equipped with movable material carts (17). The drying chamber (1) is also equipped with a movable door panel (16) that allows the movable material carts (17) to enter and exit the drying chamber (1).

8. The material drying chamber based on forward and reverse circulation according to claim 7, characterized in that, The first ventilation channel (4) and the second ventilation channel (5) are both located on the side wall of the drying chamber (1) of the opposite movable door panel (16); one end of the partition (2) is fixed to the side wall of the drying chamber (1) between the first ventilation channel (4) and the second ventilation channel (5), and the other end extends to a position close to the movable door panel (16), and a reserved gap is provided between the partition (2) and the movable door panel (16) to form the ventilation opening (3).

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