CN109059461B

CN109059461B - Drying device

Info

Publication number: CN109059461B
Application number: CN201811137811.0A
Authority: CN
Inventors: 郑存义; 连本均; 李玲; 唐壁奎; 唐旭初
Original assignee: Guangzhou Tongyi New Energy Technology Co ltd
Current assignee: Guangzhou Tongyi New Energy Technology Co ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2020-11-13
Anticipated expiration: 2038-09-27
Also published as: CN109059461A

Abstract

The invention relates to a drying device, wherein a first bin and a second bin are a drying bin and a preheating bin which are used for each other, the preheating bin is used for a first treatment stage of material drying, the drying bin is used for a second treatment stage of material drying, and a drainage fan is used for guiding gas in the drying bin into the preheating bin; when the materials in the first chamber enter the second treatment stage from the first treatment stage, the materials in the second chamber enter the first treatment stage from the second treatment stage; when the materials in the first chamber enter the first treatment stage from the second treatment stage, the materials in the second chamber enter the second treatment stage from the first treatment stage; the gas in the first bin and the gas in the second bin can flow regularly through the drainage fan, and then the recycling of gas heat is realized.

Description

Drying device

Technical Field

The invention relates to the technical field of drying, in particular to a drying device.

Background

The heat pump type drying device has the advantages of sanitation, environmental protection, convenience in operation, good drying quality and the like, and is widely used. At present, heat pump type drying mainly utilizes a heat pump to provide heat for an oven, and utilizes a gas circulation system equipped in the oven to discharge wet gas, so as to realize dehumidification and drying of materials in the oven. The discharged wet gas has the characteristics of high moisture content, large enthalpy value and the like, so that the heat utilization rate is low, and the heat loss is serious.

Disclosure of Invention

Accordingly, the present invention is directed to overcome the disadvantages of the prior art and to provide a drying apparatus to reduce heat loss.

A drying device comprises a drying bin and a drainage fan, wherein a first bin and a second bin which are mutually independent are arranged in the drying bin; the first bin is provided with a first flow channel communicated with the inside and the outside of the first bin, the first bin is internally provided with a corresponding first circulating fan and a corresponding first heater, the first circulating fan is used for enabling gas in the first bin to circularly flow, and the first heater is used for heating the gas in the first bin; the second bin is provided with a second flow channel communicated with the inside and the outside of the second bin, a second circulating fan and a second heater which correspond to each other are arranged in the second bin, the second circulating fan is used for enabling gas in the second bin to flow circularly, and the second heater is used for heating the gas in the second bin; a vent is arranged between the first bin and the second bin, and the drainage fan is arranged corresponding to the vent. The first bin and the second bin are a drying bin and a preheating bin which are mutually used, the preheating bin is used for a first treatment stage of material drying, the drying bin is used for a second treatment stage of material drying, and the drainage fan is used for guiding gas in the drying bin into the preheating bin; when the materials in the first chamber enter the second treatment stage from the first treatment stage, the materials in the second chamber enter the first treatment stage from the second treatment stage; when the materials in the first chamber enter the first treatment stage from the second treatment stage, the materials in the second chamber enter the second treatment stage from the first treatment stage.

The drying device comprises: it should be noted that, the first treatment stage is a previous stage of material dehumidification, and the first treatment stage performs preliminary dehumidification on the material, and the gas humidity of the first treatment stage is relatively high, and the dehumidification speed is high. The second treatment stage is the later stage of material dehumidification, the second treatment stage deeply dehumidifies the material, the gas humidity of the second treatment stage is small, and the dehumidification speed is low. For example: when the first bin is a preheating bin and the second bin is a drying bin, the materials in the second bin are in a drying state, the materials in the first bin are in a preheating treatment state, gas firstly enters the second bin from the second flow channel, then enters the first bin through the vent and finally flows out of the first bin through the first flow channel. At the moment, the humidity of the air in the first chamber is greater than that of the air in the second chamber, the humidity of the air in the first chamber can be reduced after the air in the second chamber enters the first chamber, and meanwhile, the air entering the first chamber can heat materials and can also take away the moisture of the materials due to the fact that the air entering the first chamber from the second chamber has the characteristics of high temperature and low humidity. After the materials in the second chamber are dried, the materials to be dried are placed into the second chamber, the first chamber is adjusted to be a drying chamber, the second chamber is adjusted to be a preheating chamber, so that the gas firstly enters the first chamber from the first flow channel, then enters the second chamber through the vent, and finally flows out of the second chamber through the second flow channel. At the moment, the humidity of the air in the second chamber is greater than that of the air in the first chamber, the air in the first chamber can reduce the humidity of the air in the second chamber after entering the second chamber, and meanwhile, the air entering the second chamber can heat materials and can also take away the moisture of the materials due to the fact that the air entering the second chamber from the first chamber has the characteristics of high temperature and low humidity. It is noted that the first treatment stage and the second treatment stage of the material in the first chamber are both completed in the first chamber; similarly, the first and second treatment stages of the material in the second chamber are both completed in the second chamber. The difference is that the direction of the gas flow guided by the draught fan is changed. That is to say, the flow direction that drainage fan guided gas can change, but the unchangeable drainage fan is in the storehouse gas drainage to preheating in the storehouse of will drying. Through this kind of mode, can make the characteristics that utilize the interior gas humidity of stoving warehouse to be less than preheating the interior gas humidity of warehouse, utilize the little hot gas of humidity to accelerate the moisture of preheating the interior material of warehouse to volatilize, this kind of mode can improve the thermal utilization ratio of gas. Meanwhile, the enthalpy and humidity characteristics of the gas can be utilized to enable the gas to take away moisture as much as possible, and therefore the dehumidification and drying efficiency is improved. And because the first treatment stage and the second treatment stage of the materials are finished in the same bin, the heat outflow caused by the movement of the materials by opening the bin door is avoided. And because the first bin and the second bin are a drying bin and a preheating bin, the drying process of the materials can be continuously finished.

In one embodiment, the drying device further comprises a heat exchanger, the heat exchanger is provided with a first air passage and a second air passage which are independent from each other, one end of the first air passage is communicated with the atmosphere, the other end of the first air passage is communicated with the first flow passage, one end of the second air passage is communicated with the atmosphere, the other end of the second air passage is communicated with the second flow passage, and the gas in the first air passage and the gas in the second air passage can exchange heat. The heat exchanger enables the gas flowing through the first air passage and the second air passage to exchange heat, and the outflow gas is used for heating the inflow gas, so that the heat utilization rate is improved.

In one embodiment, the drying device further includes a first condenser, a second condenser, a first evaporator and a second evaporator connected in the heat pump circulation loop. The first evaporator is arranged corresponding to the outlet of the first flow channel, and when the gas flows out of the first flow channel, the first evaporator is used for absorbing the heat of the gas flowing out of the first flow channel. The second evaporator is arranged corresponding to the outlet of the second flow channel, and when the second flow channel flows out of gas, the second evaporator is used for absorbing heat of the gas flowing out of the second flow channel. The first evaporator and the second evaporator which are connected in the heat pump circulation loop can respectively heat the gas in the first chamber and the second chamber by utilizing the heat release process that the refrigerant is changed from gas state to liquid state. The refrigerant in the circulation loop has stronger heat absorption performance, and the first evaporator and the second evaporator can absorb the heat of the gas flowing out of the first flow channel or the second flow channel, so that the utilization rate of the heat is improved.

In one embodiment, the heat pump circulation loop comprises a first circulation branch and a second circulation branch which work independently, the first evaporator is connected in the first circulation branch, the second evaporator is connected in the second circulation branch, and when the gas flows out of the first flow passage, the first evaporator works, and the second evaporator stops working; when the second flow channel flows out gas, the second evaporator works, and the first evaporator stops working. The first evaporator and the second evaporator are respectively connected in the first circulation branch and the second circulation branch, and two states of working and stopping of the first evaporator and the second evaporator can be finished by respectively controlling the first circulation branch and the second circulation branch. Through the control of the first evaporator and the second evaporator, the first evaporator and the second evaporator can be effectively utilized to carry out heat recovery on the gas discharged out of the first chamber and the second chamber, and meanwhile, the first evaporator and the second evaporator are prevented from absorbing the heat of the gas entering the first chamber and the second chamber.

In one embodiment, the first condenser is the first heater; the second condenser is the second heater, has a simple structure, and makes full use of the thermal cycle performance of the heat pump cycle system.

In one embodiment, the flow direction of the gas flowing in the drying chamber at the inlet of the drainage fan is the same as the drainage wind direction of the drainage fan, and the flow direction of the gas circulating in the drying chamber at the outlet of the drainage fan is the same as the drainage wind direction of the drainage fan. The drainage fan guides the gas to flow between the drying chamber and the preheating chamber along the flowing direction of the gas in the drying chamber and the preheating chamber, so that the resistance of the drainage fan for guiding the gas to flow can be reduced, the drainage fan can smoothly guide the gas to flow, and the phenomenon of turbulent flow in the drying chamber and the preheating chamber is reduced.

In one embodiment, the first flow passage communicates with a side of the first chamber away from the vent; the second flow passage is communicated with one side of the first chamber far away from the ventilation opening. The relative setting of first runner and second runner and vent can increase the flow path of inflow gas, and it is long when improving the contact of gas and material, promotes the dehumidification effect.

In one embodiment, the drying device further comprises a first shelf and a second shelf; the first storage rack is arranged in the first chamber, and a first gas circulation flow channel is formed between the first storage rack and the chamber wall of the first chamber at intervals; the second storage rack is arranged in the second chamber, and a second gas circulation flow channel is formed between the second storage rack and the chamber wall of the second chamber at intervals. First supporter and second supporter can be favorable to laying the expansion material, improve the area of contact of material and gas, improve the dehumidification effect, utilize first gas circulation runner and second gas circulation runner can promote the patency that gas flows simultaneously, and then guarantee the dehumidification effect.

In one embodiment, the first shelf comprises a first shelf body and a plurality of layers of first partition plates arranged on the first shelf body, and the adjacent first partition plates are arranged at intervals to form a first air duct; the second supporter includes the second support body and sets up the multilayer second baffle on the second support body, and adjacent second baffle interval sets up and forms the second wind channel. The space utilization rate can be improved by the multiple layers of first partition plates and the multiple layers of second partition plates, and the first air channels between the first partition plates and the second air channels between the second partition plates can also be favorable for air flowing.

In one embodiment, the first circulating fan is arranged at the top of the first bin; and the second circulating fan is arranged at the top of the second bin. The carrying and transferring of the shelf are facilitated, and the utilization rate of the bottoms of the first bin and the second bin and the convenience of operation are improved.

Drawings

Fig. 1 is a schematic structural diagram of a drying apparatus according to an embodiment;

fig. 2 is a diagram illustrating a state of the drying apparatus according to an embodiment;

fig. 3 is a diagram illustrating a state of the drying apparatus according to an embodiment;

fig. 4 is a diagram illustrating a state of the drying apparatus according to an embodiment;

FIG. 5 is a heat pump cycle according to one embodiment;

fig. 6 is a diagram of a heat pump cycle according to an embodiment.

Description of reference numerals: 100. the drying device comprises a drying bin, 110, a first bin, 111, a first flow channel, 120, a second bin, 121, a second flow channel, 130, an air vent, 140, a draught fan, 210, a first circulating fan, 220, a first heater, 310, a second circulating fan, 320, a second heater, 410, a heat exchanger, 411, a first air channel, 412, a second air channel, 421, a first condenser, 422, a second condenser, 423, a first evaporator, 424, a second evaporator, 425, a compressor, 510, a first shelf, 511, a first air circulating flow channel, 512, a first frame body, 513, a first partition plate, 514, a first air channel, 520, a second shelf, 521, a second air circulating flow channel, 522, a second frame body, 523, a second partition plate, 524, a second air channel, 610, a first fan, 620 and a second fan.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an embodiment provides a drying device, including a drying bin 100 and a blower fan 140, where a first bin 110 and a second bin 120 that are independent of each other are disposed in the drying bin 100: the first bin 110 is provided with a first flow channel 111 communicating the inside and the outside of the first bin 110, the first bin 110 is internally provided with a corresponding first circulating fan 210 and a corresponding first heater 220, the first circulating fan 210 is used for enabling gas in the first bin 110 to circularly flow, and the first heater 220 is used for heating the gas in the first bin 110; the second bin 120 is provided with a second flow channel 121 communicating the inside and the outside of the second bin 120, the second bin 120 is internally provided with a corresponding second circulating fan 310 and a second heater 320, the second circulating fan 310 is used for enabling gas in the second bin 120 to circularly flow, and the second heater 320 is used for heating the gas in the second bin 120; a vent 130 is arranged between the first bin 110 and the second bin 120, and the draught fan 140 is arranged corresponding to the vent 130. Referring to fig. 2 or fig. 4, the first bin 110 and the second bin 120 are a drying bin and a preheating bin, the preheating bin is used for a first processing stage of material drying, the drying bin is used for a second processing stage of material drying, and the flow guide fan 140 is used for guiding air in the drying bin into the preheating bin. When the material in the first bin 110 enters the second processing stage from the first processing stage, the material in the second bin 120 enters the first processing stage from the second processing stage; when the material in the first bin 110 enters the first processing stage from the second processing stage, the material in the second bin 120 enters the second processing stage from the first processing stage.

The drying device comprises: it should be noted that, the first treatment stage is a previous stage of material dehumidification, and the first treatment stage performs preliminary dehumidification on the material, and the gas humidity of the first treatment stage is relatively high, and the dehumidification speed is high. The second treatment stage is the later stage of material dehumidification, the second treatment stage deeply dehumidifies the material, the gas humidity of the second treatment stage is small, and the dehumidification speed is low. For example: when the first bin 110 is a preheating bin and the second bin 120 is a drying bin, the material in the second bin 120 is in a drying state, the material in the first bin 110 is in a preheating state, the gas firstly enters the second bin 120 from the second flow channel 121, then enters the first bin 110 through the vent 130, and finally flows out of the first bin 110 through the first flow channel 111. At this time, the humidity of the gas in the first chamber 110 is greater than the humidity of the gas in the second chamber 120, and the gas in the second chamber 120 will help to reduce the humidity of the gas in the first chamber 110 after entering the first chamber 110. Meanwhile, since the gas entering the first chamber 110 from the second chamber 120 has the characteristics of high temperature and low humidity, the gas entering the first chamber 110 can heat the material and can carry away the moisture of the material. After the materials in the second chamber 120 are dried, the materials to be dried are placed into the second chamber 120, the first chamber 110 is adjusted to be a drying chamber, the second chamber 120 is adjusted to be a preheating chamber, so that the gas firstly enters the first chamber 110 from the first flow channel 111, then enters the second chamber 120 through the vent 130, and finally flows out of the second chamber 120 through the second flow channel 121. At this time, the humidity of the gas in the second chamber 120 is greater than the humidity of the gas in the first chamber 110, the humidity of the gas in the second chamber 120 can be reduced after the gas in the first chamber 110 enters the second chamber 120, and meanwhile, the gas entering the second chamber 120 from the first chamber 110 has the characteristics of high temperature and low humidity, so that the gas can heat the material and can carry away the moisture of the material. It should be noted that the first processing stage and the second processing stage of the material in the first bin 110 are both completed in the first bin 110; similarly, the first and second processing stages of the material in the second chamber 120 are both completed in the second chamber 120. Except that the direction in which the draft fan 140 directs the flow of gas is changed. That is, the flow direction of the air guided by the draft fan 140 changes, but the draft fan 140 guides the air in the drying chamber to the preheating chamber. Through this kind of mode, can make the characteristics that utilize the interior gas humidity of stoving warehouse to be less than preheating the interior gas humidity of warehouse, utilize the little hot gas of humidity to accelerate the moisture of preheating the interior material of warehouse to volatilize, this kind of mode can improve the thermal utilization ratio of gas. Meanwhile, the enthalpy and humidity characteristics of the gas can be utilized to enable the gas to take away moisture as much as possible, and therefore the dehumidification and drying efficiency is improved. And because the first treatment stage and the second treatment stage of the materials are finished in the same bin, the heat outflow caused by the movement of the materials by opening the bin door is avoided. And since the first bin 110 and the second bin 120 are a drying bin and a preheating bin, the drying process of the materials can be continuously completed.

It should be noted that, because the flow direction of the gas guided by the flow guiding fan 140 changes, the flow guiding fan 140 selected here can achieve flow guiding in both forward and reverse directions. In other words, the switching of the flow guiding direction can be realized by the flow guiding fan 140 through the forward and reverse rotation of the fan blades, or the switching of the flow guiding direction can be realized by the rotation of the whole machine by the flow guiding fan 140. Specifically, in this embodiment, the switching of the flow direction of the air flow is realized by the fan 140 rotating forward and backward.

Specifically, in the present embodiment, the draft fan 140 is installed in the vent 130. In other embodiments, the blower 140 may be installed in the first chamber 110 or the second chamber 120, and the blower 140 performs the air flow guiding through the communication with the ventilation opening 130.

In an embodiment, as shown in fig. 1, the drying apparatus further includes a heat exchanger 410, the heat exchanger 410 is provided with a first air passage 411 and a second air passage 412 which are independent of each other, one end of the first air passage 411 is communicated with the atmosphere, the other end of the first air passage 411 is communicated with the first flow passage 111, one end of the second air passage 412 is communicated with the atmosphere, the other end of the second air passage 412 is communicated with the second flow passage 121, and the gas in the first air passage 411 and the second air passage 412 can exchange heat. The heat exchanger 410 is disposed to exchange heat between the gas flowing through the first gas duct 411 and the second gas duct 412, and heat the gas flowing in by using the gas flowing out, thereby improving the heat utilization rate.

Specifically, in the present embodiment, the heat exchanger 410 is a gas-gas heat exchanger 410.

Referring to fig. 5 or fig. 6, in an embodiment, the drying apparatus further includes a first condenser 421, a second condenser 422, a first evaporator 423, and a second evaporator 424 connected to the heat pump circulation circuit. Referring to fig. 1 or 2, the first evaporator 423 is disposed corresponding to the outlet of the first flow channel 111, and when the gas flows out of the first flow channel 111, the first evaporator 423 is used for absorbing heat of the gas flowing out of the first flow channel 111. Referring to fig. 1 or fig. 3, the second evaporator 424 is disposed corresponding to the outlet of the second flow channel 121, and when the gas flows out of the second flow channel 121, the second evaporator 424 is used for absorbing heat of the gas flowing out of the second flow channel 121. The first evaporator 423 and the second evaporator 424 connected to the heat pump cycle can heat the gas in the first chamber 110 and the second chamber 120, respectively, by using a heat release process in which the refrigerant changes from a gas state to a liquid state. The refrigerant in the circulation loop has a strong heat absorption performance, and the first evaporator 423 and the second evaporator 424 can absorb the heat of the gas flowing out of the first flow channel 111 or the second flow channel 121, thereby improving the utilization rate of the heat.

In one embodiment, the heat pump circulation circuit includes a first circulation branch and a second circulation branch (not shown) which work independently, the first evaporator 423 is connected to the first circulation branch, the second evaporator 424 is connected to the second circulation branch, and when the gas flows out of the first flow channel 111, the first evaporator 423 works, and the second evaporator 424 stops working; when the gas flows out of the second flow path 121, the second evaporator 424 operates, and the first evaporator 423 stops operating. The first evaporator 423 and the second evaporator 424 are respectively connected to the first circulation branch and the second circulation branch, and two states of operation and stop of the first evaporator 423 and the second evaporator 424 can be completed by respectively controlling the first circulation branch and the second circulation branch. Through the control of the first evaporator 423 and the second evaporator 424, the first evaporator 423 and the second evaporator 424 can be effectively utilized to perform heat recovery on the gas exiting the first bin 110 and the second bin 120, while preventing the first evaporator 423 and the second evaporator 424 from absorbing heat of the gas entering the first bin 110 and the second bin 120.

As shown in fig. 5, in the present embodiment, the first circulation branch and the second circulation branch are connected in parallel in the heat pump circulation circuit, the first evaporator 423 is connected in the first circulation circuit, the second evaporator 424 is connected in the second circulation circuit, the first condenser 421 and the second condenser 422 are connected in parallel in the heat pump circulation circuit, the heat pump circulation circuit further includes a compressor 425, and the flow of the refrigerant in the heat pump circulation circuit is controlled by the compressor 425.

In another embodiment, as shown in fig. 6, the first circulation branch and the second circulation branch are connected in parallel in the heat pump circulation circuit, the first evaporator 423 is connected in the first circulation circuit, the second evaporator 424 is connected in the second circulation circuit, the first condenser 421 and the second condenser 422 are connected in series in the heat pump circulation circuit, the heat pump circulation circuit further includes a compressor 425, and the flow of the refrigerant in the heat pump circulation circuit is controlled by the compressor 425.

It should be noted that fig. 5 and fig. 6 are schematic diagrams, that is, they are only used to illustrate the connection relationship among the first condenser 421, the second condenser 422, the first evaporator 423, the second evaporator 424, and the compressor 425. The heat pump circulation circuit should have other devices necessary for the heat pump circulation circuit.

As shown in fig. 1, specifically, in the present embodiment, the first condenser 421 is the first heater 220; the second condenser 422 is the second heater 320, has a simple structure, and makes full use of the thermal cycle performance of the heat pump cycle system.

In an embodiment, as shown in fig. 2 or fig. 4, a flow direction of the gas flowing in the drying compartment at an inlet of the draft fan 140 is the same as a draft wind direction of the draft fan 140, and a flow direction of the gas circulating in the drying compartment 100 at an outlet of the draft fan 140 is the same as the draft direction of the draft fan 140. The flow guiding fan 140 guides the gas to flow between the drying chamber and the preheating chamber along the flowing direction of the gas in the drying chamber and the preheating chamber, so that the resistance of the flow guiding fan 140 for guiding the gas to flow can be reduced, the flow guiding fan 140 can smoothly guide the gas to flow, and the phenomenon of turbulent flow in the drying chamber and the preheating chamber is reduced.

Specifically, the following description is made with reference to fig. 4: the gas in the first bin 110 flows in a counterclockwise circulating manner, the gas in the second bin 120 flows in a counterclockwise circulating manner, the draft fan 140 is used for guiding the gas in the first bin 110 into the second bin 120, the vent 130 is communicated with the bottoms of the first bin 110 and the second bin 120, the gas at the bottom of the first bin 110 flows in a direction close to the second bin 120 and flows into the inlet of the draft fan 140, and the gas entering the second bin 120 and the gas at the bottom of the second bin 120 can flow in a direction away from the first bin 110.

It should be noted that, similarly, in fig. 3, the gas in the first chamber 110 and the gas in the second chamber 120 both flow in a clockwise circulation manner. But now the blower fan 140 located at the bottom of the drying compartment 100 is used to guide the air in the second compartment 120 into the first compartment 110.

It should be noted that when the gas is circulated as shown in fig. 4, if the vent 130 communicates with the top of the first bin 110 and the top of the second bin 120, the draft fan 140 can be used to guide the gas in the second bin 120 into the first bin 110. And when the gas is circulated as shown in fig. 3, if the vent 130 communicates with the top of the first and

second plenums

110 and 120, the draft fan 140 may be used to direct the gas in the first plenum 110 into the second plenum 120.

In an embodiment, as shown in fig. 1, fig. 2 or fig. 3, the first flow passage 111 communicates with a side of the first chamber 110 away from the vent 130; the second flow path 121 communicates with a side of the first chamber 110 away from the vent 130. The relative arrangement of the first flow channel 111 and the second flow channel 121 and the vent 130 can increase the flow path of the inflow gas, improve the contact duration of the gas and the material, and improve the dehumidification effect.

Referring to fig. 1, in an embodiment, the drying device further includes a first shelf 510 and a second shelf 520; the first rack 510, the first rack 510 is disposed in the first chamber 110, and the first rack 510 and the chamber wall of the first chamber 110 form a first gas circulation flow passage 511 at an interval; the second rack 520 is disposed in the second chamber 120, and the second rack 520 and the chamber wall of the second chamber 120 form a second gas circulation channel 521 at an interval. First supporter 510 and second supporter 520 can be favorable to laying and expand the material, improve the area of contact of material and gas, improve the dehumidification effect, utilize first gas circulation runner 511 and second gas circulation runner 521 can promote the unobstructed nature that gas flows simultaneously, and then guarantee the dehumidification effect.

Referring to fig. 1, in an embodiment, the first rack 510 includes a first rack 512 and a plurality of first partitions 513 disposed on the first rack 512, wherein adjacent first partitions 513 are disposed at intervals to form first air channels 514; the second rack 520 includes a second rack 522 and a plurality of second partitions 523 disposed on the second rack 522, wherein the adjacent second partitions 523 are disposed at intervals to form a second air duct 524. The plurality of layers of first partition plates 513 and the plurality of layers of second partition plates 523 can improve the space utilization rate, and the first air channels 514 between the first partition plates 513 and the second air channels 524 between the second partition plates 523 can also facilitate the air flow.

Referring to fig. 1, in an embodiment, the first circulation fan 210 is disposed at the top of the first bin 110; the second circulation fan 310 is disposed at the top of the second bin 120. The carrying and transferring of the shelf are facilitated, and the utilization rate of the bottoms of the first bin 110 and the second bin 120 and the convenience of operation are improved.

Specifically, in an embodiment, the drying apparatus further includes a first fan 610 and a second fan 620, the first fan 610 is disposed corresponding to the first flow channel 111, the first fan 610 is configured to ensure a flow rate of the gas flowing through the first flow channel 111, the second fan 620 is disposed corresponding to the second flow channel 121, and the second fan 620 is configured to ensure a flow rate of the gas flowing through the second flow channel 121. It should be noted that the first flow channel 111 and the second flow channel 121 can both flow gas in and out. Preferably, both the first fan 610 and the second fan 620 can rotate forward and backward, and the switching of the gas flowing directions in the first flow channel 111 and the second flow channel 121 is realized by the forward and backward rotation of the first fan 610 and the second fan 620.

In one embodiment, the drying chamber 100 is made of a heat insulating material, so that heat dissipation can be reduced. Specifically, in this embodiment, the inner walls of the first chamber 110 and the second chamber 120 are adhered with insulating layers.

The operation principle of the drying device is described below with reference to fig. 2, 3 and 4:

in the beginning of use, the drying device is arranged as shown in fig. 2, the first bin 110 is empty, the second bin 120 is used for placing the material to be preheated, and the second heater 320, the second circulating fan 310 and the draught fan 140 are used for performing the first treatment stage treatment on the material in the second bin 120. It should be noted that, at this time, the first heater 220 and the first circulation fan 210 in the first bin 110 may be in an operating state or in a non-operating state. In other words, both the first heater 220 and the first circulation fan 210 are in operation; or the first heater 220 is in a working state, and the first circulation fan 210 is in a non-working state; or the first heater 220 is in a working state, and the first circulation fan 210 is in a non-working state; or the first circulation fan 210 is in a working state and the first heater 220 is in a non-working state; or both the first heater 220 and the first circulation fan 210 are in a non-operating state.

Further, after the material in the second chamber 120 completes the first treatment stage, the material to be preheated is added into the first chamber 110, and the drying device is set as shown in fig. 3. Changing the flow direction of the flow inducing fan 140 by circulating the gas in the first and

second bins

110 and 120 by the first and second circulating

fans

210 and 310, respectively, as shown; the first chamber 110 is a preheating chamber, the second chamber 120 is a drying chamber, the material in the first chamber 110 enters the first processing stage, and the material in the second chamber 120 enters the second processing stage.

Still further, after the material in the second bin 120 completes the second processing stage, the dried material in the second bin 120 is taken out and the material to be preheated is added into the second bin 120, and the drying device is set as shown in fig. 4. Changing the flow direction of the flow inducing fan 140 by circulating the gas in the first and

second bins

110 and 120 by the first and second circulating

fans

210 and 310, respectively, as shown; the first chamber 110 becomes a drying chamber, the second chamber 120 becomes a preheating chamber, the material in the first chamber 110 enters the second processing stage, and the material in the second chamber 120 enters the second processing stage.

It should be noted that, the specific division between the first treatment stage and the second treatment stage in the drying process may be determined in several ways, and may be determined according to the drying time period in the drying process, or according to the weight reduction condition of the material.

When the first and second treatment stages are divided according to the drying time period, the drying time period may be regarded as one drying cycle, and the first and second treatment stages may be divided according to the moisture in the material in the drying cycle. It is preferable that the first processing stage and the second processing stage are equal in duration in terms of division. Of course, in the actual drying process, there may be a difference in the time length between the first and second treatment stages due to the difference in the moisture content of the material at the time of drying.

When the first treatment stage and the second treatment stage are divided according to the weight reduction condition, the weight reduction time of the material can be regarded as a weight reduction period, and the first treatment stage and the second treatment stage can be divided according to the weight reduction change curve of the moisture in the material in the drying period. It is preferable that the first processing stage and the second processing stage are equal in duration in terms of division. Of course, in the actual drying process, there may be a difference in the time length between the first and second treatment stages due to the difference in the moisture content of the material at the time of drying.

It should be explained that the above two differences are that the way of dividing the first treatment stage and the second treatment stage according to the drying time length is mainly performed according to the research result of the drying process. That is, it is judged according to the empirical drying time period. The mode of dividing the first treatment stage and the second treatment stage according to the weight reduction condition is mainly based on the test data of the weight reduction of the material. That is, it is judged by measuring weight loss data of the material.

It should be noted that, in order to adjust the duration of the first treatment stage and the second treatment stage, the flow rates of the refrigerants entering the first condenser 421 and the second condenser 422 can be adjusted.

Specifically, a flow rate regulating valve (not shown) may be provided in the heat pump cycle, and the flow rate of the refrigerant distributed to flow into the first condenser 421 and the second condenser 422 may be regulated by the flow rate regulating valve.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A drying device is characterized by comprising a drying bin and a drainage fan, wherein a first bin and a second bin which are mutually independent are arranged in the drying bin;

the first bin is provided with a first flow channel communicated with the inside and the outside of the first bin, the first bin is internally provided with a corresponding first circulating fan and a corresponding first heater, the first circulating fan is used for enabling gas in the first bin to circularly flow, and the first heater is used for heating the gas in the first bin;

the second bin is provided with a second flow channel communicated with the inside and the outside of the second bin, a second circulating fan and a second heater which correspond to each other are arranged in the second bin, the second circulating fan is used for enabling gas in the second bin to flow circularly, and the second heater is used for heating the gas in the second bin;

a ventilation opening is formed between the first bin and the second bin, and the drainage fan is arranged corresponding to the ventilation opening;

the first bin and the second bin are a drying bin and a preheating bin which are mutually used, the preheating bin is used for a first treatment stage of material drying, the drying bin is used for a second treatment stage of material drying, and the drainage fan is used for guiding gas in the drying bin into the preheating bin;

when the materials in the first chamber enter the second treatment stage from the first treatment stage, the materials in the second chamber enter the first treatment stage from the second treatment stage;

when the materials in the first chamber enter the first treatment stage from the second treatment stage, the materials in the second chamber enter the second treatment stage from the first treatment stage.

2. The drying apparatus of claim 1, further comprising a heat exchanger, wherein the heat exchanger is provided with a first air passage and a second air passage which are independent of each other, one end of the first air passage is communicated with the atmosphere, the other end of the first air passage is communicated with the first flow passage, one end of the second air passage is communicated with the atmosphere, the other end of the second air passage is communicated with the second flow passage, and the gas in the first air passage and the second air passage can exchange heat.

3. The drying apparatus of claim 2, further comprising a first condenser, a second condenser, a first evaporator and a second evaporator connected in the heat pump circulation circuit;

the first evaporator is arranged corresponding to the outlet of the first flow channel, and is used for absorbing heat of the gas flowing out of the first flow channel when the gas flows out of the first flow channel;

the second evaporator is arranged corresponding to the outlet of the second flow channel, and when the second flow channel flows out of gas, the second evaporator is used for absorbing heat of the gas flowing out of the second flow channel.

4. The drying apparatus of claim 3, comprising a first circulation branch and a second circulation branch which are independently operated, wherein the first evaporator is connected to the first circulation branch, the second evaporator is connected to the second circulation branch, and when the first flow channel discharges the gas, the first evaporator is operated, and the second evaporator is stopped; when the second flow channel flows out gas, the second evaporator works, and the first evaporator stops working.

5. The drying apparatus as claimed in claim 3, wherein the first condenser is the first heater; the second condenser is the second heater.

6. The drying device of claim 5, wherein the flow direction of the gas flowing in the drying chamber at the inlet of the draught fan is the same as the flow direction of the draught fan, and the flow direction of the gas circulating in the drying chamber at the outlet of the draught fan is the same as the flow direction of the draught fan.

7. The drying apparatus of claim 6, wherein the first flow passage communicates with a side of the first chamber away from the vent; the second flow passage is communicated with one side of the first chamber far away from the ventilation opening.

8. The drying apparatus of any one of claims 1 to 7, further comprising a first shelf and a second shelf;

the first storage rack is arranged in the first chamber, and a first gas circulation flow channel is formed between the first storage rack and the chamber wall of the first chamber at intervals;

the second storage rack is arranged in the second chamber, and a second gas circulation flow channel is formed between the second storage rack and the chamber wall of the second chamber at intervals.

9. The drying device according to claim 8, wherein the first rack comprises a first rack body and a plurality of layers of first partition plates arranged on the first rack body, and the first air ducts are formed by arranging adjacent first partition plates at intervals;

the second supporter includes the second support body and sets up the multilayer second baffle on the second support body, and adjacent second baffle interval sets up and forms the second wind channel.

10. The drying apparatus of claim 8, wherein the first circulation fan is disposed at a top of the first compartment; and the second circulating fan is arranged at the top of the second bin.