Cascade dryer capable of adjusting exhaust proportion

Abstract

The utility model discloses a cascade dryer capable of adjusting the exhaust proportion. The cascade dryer capable of adjusting the exhaust proportion comprises a double-channel heat recovery core body, an air return channel and an air inlet channel, wherein the air return channel and the air inlet channel are connected into the double-channel heat recovery core body. The air return channel is provided with a bypass opening connected into the air inlet channel, and a first air valve is arranged in the bypass opening. An exhaust outlet is formed in the tail end of the air return channel, and a second air valve is arranged in the exhaust outlet; the first air valve and the second air valve are both air valves with adjustable opening degrees. The dryer can automatically control the opening degree proportion of the first air valve and the second air valve through the temperature change of the external environment, and the air exhaust proportion is adjusted by freely adjusting the opening degree proportion of the first air valve and the second air valve, so that the dryer adapts to different environment climate conditions all the year round.

Description

Technical Field

[0001] This utility model relates to the field of dryer structure technology, and in particular to an adjustable exhaust ratio cascade dryer. Background Technology

[0002] Most direct-heating units on the market can operate normally in summer when the ambient temperature is high. However, once winter arrives and the ambient temperature drops, the unit's outlet air temperature cannot meet the actual drying requirements of the materials, resulting in significant limitations in its use. Users cannot dry materials effectively in winter. Utility Model Content

[0003] To overcome the problems existing in related technologies, this utility model provides an adjustable exhaust ratio cascade dryer. The dryer can automatically control the opening ratio of the first air valve and the second air valve according to the temperature change of the external environment. By freely adjusting the opening ratio of the first air valve and the second air valve, the exhaust ratio can be adjusted to adapt to different environmental and climatic conditions throughout the year.

[0004] This utility model provides an adjustable exhaust ratio cascade dryer, which includes a dual-channel heat recovery core, and a return air channel and an inlet air channel connected to the dual-channel heat recovery core.

[0005] The return air duct is provided with a bypass port that connects to the air inlet duct, and a first air valve is provided in the bypass port.

[0006] An exhaust vent is provided at the end of the return air duct, and a second air valve is provided inside the exhaust vent.

[0007] Both the first and second air valves are adjustable air valves.

[0008] Furthermore, the adjustable exhaust ratio cascade dryer also includes a first evaporator;

[0009] The first evaporator is disposed between the air inlet of the air inlet channel and the dual-channel heat recovery core.

[0010] Furthermore, the dual-channel heat recovery core is located at the intersection of the air inlet channel and the air return channel.

[0011] Furthermore, the adjustable exhaust ratio cascade dryer also includes a second evaporator;

[0012] The second evaporator is disposed between the dual-channel heat recovery core and the exhaust port.

[0013] Furthermore, a first fan is installed in the return air duct;

[0014] The first fan is positioned between the second evaporator and the exhaust port.

[0015] Furthermore, the adjustable exhaust ratio cascade dryer also includes a first condenser and a second condenser;

[0016] The first condenser and the second condenser are arranged sequentially in the air outlet channel of the dual-channel heat recovery core.

[0017] Furthermore, the air outlet of the dual-channel heat recovery core is configured as an air outlet at its end;

[0018] The adjustable exhaust ratio cascade dryer also includes a second fan, which is disposed between the second condenser and the air outlet.

[0019] This utility model provides an adjustable exhaust ratio cascade dryer. The dryer can automatically control the opening ratio of the first air valve and the second air valve according to the temperature change of the external environment. By freely adjusting the opening ratio of the first air valve and the second air valve, the exhaust ratio can be adjusted to adapt to different environmental and climatic conditions throughout the year. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the adjustable exhaust ratio cascade dryer of this utility model. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to Figure 1 This utility model provides an adjustable exhaust ratio cascade dryer, which includes a dual-channel heat recovery core 6, and a return air channel and an inlet air channel connected to the dual-channel heat recovery core 6;

[0024] The return air duct is provided with a bypass port that connects to the air inlet duct, and a first air valve 1 is provided in the bypass port. The return airflow of the return air duct enters the air inlet duct through the first air valve 1, and merges with the fresh airflow of the external environment input by the air inlet 4 of the air inlet duct before entering the dual-channel heat recovery core 6.

[0025] The end of the return air duct is provided with an exhaust port 3, and a second air valve 2 is provided inside the exhaust port 3. Both the first air valve 1 and the second air valve 2 are air valves with adjustable opening.

[0026] Specifically, when the ambient temperature is low, by adjusting and increasing the opening of the first air valve 1 and decreasing the opening of the second air valve 2, the exhaust volume of the dryer is reduced, so that the airflow inside the dryer flows back to the dual-channel heat recovery core 6 through the return air channel, thereby increasing the temperature of the output airflow of the dryer to meet the temperature regulation requirements of the external environment.

[0027] When the ambient temperature is too high, by adjusting the opening of the first air valve 1 to decrease and the opening of the second air valve 2 to increase, most of the return airflow inside the dryer can be discharged, thereby reducing the temperature of the output airflow of the dryer. By freely adjusting the opening ratio of the first air valve 1 and the second air valve 2, the exhaust ratio can be adjusted to adapt to different environmental and climatic conditions throughout the year.

[0028] Furthermore, the adjustable exhaust ratio cascade dryer also includes a first evaporator 51;

[0029] The first evaporator 51 is located between the air inlet 4 of the air inlet channel and the dual-channel heat recovery core 6. External air enters the first evaporator 51 through the air inlet 4, which lowers the temperature of the gas.

[0030] The bypass port with the first air valve 1, the air inlet 4, and the first evaporator 51 are arranged sequentially in the air inlet channel, so that the air inlet channel can collect the return airflow inside the dryer and the fresh airflow from the external environment to achieve mixed airflow.

[0031] The first evaporator 51 is frequency-controlled, which effectively improves the performance and control accuracy of the unit under different operating conditions. It adopts a cascade system design and works in conjunction with the dual-channel heat recovery core 6 to improve the overall waste heat recovery and thus reduce the overall drying energy consumption.

[0032] Furthermore, the dual-channel heat recovery core 6 is located at the intersection of the air inlet channel and the air return channel. One side of the dual-channel heat recovery core 6 is connected to the air return port 61 of the air return channel, and the air return port 61 of the air return channel can return the indoor airflow to the inside of the dryer.

[0033] Specifically, when air enters the first evaporator 51 through the air inlet 4, the temperature of the gas decreases, thus creating a large temperature difference with the gas in the return air inlet 61, thereby improving the heat recovery capacity of the dual-channel heat recovery core 6.

[0034] Furthermore, the adjustable exhaust ratio cascade dryer also includes a second evaporator 52;

[0035] The second evaporator 52 is disposed between the dual-channel heat recovery core 6 and the exhaust port 3, so that the return airflow passing through the dual-channel heat recovery core 6 can be cooled down by the second evaporator 52, thereby reducing the operating temperature of the exhaust section of the dryer.

[0036] Furthermore, a first fan 53 is installed in the return air duct;

[0037] The first fan 53 is disposed between the second evaporator 52 and the exhaust port 3. The first fan 53 drives the return airflow to flow along the return air channel so as to discharge the return airflow of the dryer and input the return airflow into the air inlet channel.

[0038] Specifically, the adjustable exhaust ratio cascade dryer also includes a first condenser 71 and a second condenser 72;

[0039] The first condenser 71 and the second condenser 72 are arranged sequentially in the air outlet channel of the dual-channel heat recovery core 6.

[0040] The air outlet 74 is set at the end of the air outlet channel of the dual-channel heat recovery core 6;

[0041] The adjustable exhaust ratio cascade dryer also includes a second fan 73, which is disposed between the second condenser 72 and the air outlet 74.

[0042] Specifically, the gas inside the dual-channel heat recovery core 6 is heated by the first condenser 71 and the second condenser 72, which raises the temperature of the gas inside the dual-channel heat recovery core 6. The gas inside the dual-channel heat recovery core 6 is heated by the first condenser 71 and the second condenser 72, and becomes high-temperature dry gas, which is then sent into the drying room through the air outlet 74.

[0043] Specifically, the waste heat from the drying oven is partially recovered through the heat recovery core via the return air vent 61, and then continues to be recovered through the second evaporator 52. The opening of the first air valve 1 and the second air valve 2 is adjusted according to changes in ambient temperature to control the exhaust volume ratio. The lower the ambient temperature, the larger the opening of the first air valve 1 and the smaller the opening of the second air valve 2, increasing the temperature of the mixed air in the exhaust and intake channels. This ensures that the first evaporator 51 has sufficient heat to absorb. Conversely, if the temperature is too high, the opening of the first air valve 1 is closed to prevent the temperature passing through the first evaporator 51 from exceeding the specified value and causing the compressor evaporation temperature to exceed the limit, thus adapting to different environmental and climatic conditions throughout the year.

[0044] Furthermore, the adjustable exhaust ratio cascade dryer provided in the embodiments of this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cascade dryer with adjustable exhaust ratio, characterized in that, The adjustable exhaust ratio cascade dryer includes a dual-channel heat recovery core, and a return air channel and an inlet air channel connected to the dual-channel heat recovery core; The return air duct is provided with a bypass port that connects to the air inlet duct, and a first air valve is provided in the bypass port. An exhaust vent is provided at the end of the return air duct, and a second air valve is provided inside the exhaust vent. Both the first and second air valves are adjustable air valves.

2. The adjustable exhaust ratio cascade dryer according to claim 1, characterized in that, The adjustable exhaust ratio cascade dryer also includes a first evaporator; The first evaporator is disposed between the air inlet of the air inlet channel and the dual-channel heat recovery core.

3. The adjustable exhaust ratio cascade dryer according to claim 1, characterized in that, The dual-channel heat recovery core is located at the intersection of the air inlet channel and the air return channel.

4. The adjustable exhaust ratio cascade dryer according to claim 1, characterized in that, The adjustable exhaust ratio cascade dryer also includes a second evaporator; The second evaporator is disposed between the dual-channel heat recovery core and the exhaust port.

5. The adjustable exhaust ratio cascade dryer according to claim 4, characterized in that, The return air duct is equipped with a first fan; The first fan is positioned between the second evaporator and the exhaust port.

6. The adjustable exhaust ratio cascade dryer according to claim 1, characterized in that, The adjustable exhaust ratio cascade dryer also includes a first condenser and a second condenser. The first condenser and the second condenser are arranged sequentially in the air outlet channel of the dual-channel heat recovery core.

7. The adjustable exhaust ratio cascade dryer according to claim 6, characterized in that, The air outlet is set at the end of the air outlet channel of the dual-channel heat recovery core; The adjustable exhaust ratio cascade dryer also includes a second fan, which is disposed between the second condenser and the air outlet.

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