An intelligent control dual-heat-source energy-saving drying and cooking system and its drying method

Abstract

The present invention discloses an intelligent control dual-heat-source energy-saving drying and steaming system and its drying method. The system includes a drying chamber, a steam generator, a three-way reversing valve, a first heat exchanger, a circulation fan, a compressor, a first reversing valve, a fourth heat exchanger, a second reversing valve, a third heat exchanger and a second heat exchanger. The steam generated by the steam generator heats the circulating air in the drying chamber through the first heat exchanger; the compressor, the first reversing valve, the fourth heat exchanger, the second reversing valve and the third heat exchanger constitute a medium circulation dehumidification circuit; the compressor, the first reversing valve, the second heat exchanger, the second reversing valve and the third heat exchanger constitute a medium circulation dehumidification and heating circuit. The system and its drying method of this patent adopt dual heat sources: air energy heat source and steam heat source, and are intelligently controlled by a PLC controller, realizing the complementary advantages of the dual heat sources. According to different drying time periods, different heating methods are adopted to make full use of the heat energy. Energy conservation and environmental protection are the biggest features of this patent.

Description

Technical Field

[0001] The present invention relates to the technical field of drying, and particularly to a dual-source drying and steaming system and its drying method. Background Art

[0002] For existing dryers, there are various ways of using heat sources for drying. Some only use air energy for heating. For example, the patent document with the publication number CN111609708A disclosed by the State Bureau. The present invention discloses an integrated internal circulation heat pump dryer, which includes a dryer main body placed indoors. The dryer main body includes a compressor, a main condenser, and an expansion valve connected end to end. A dehumidifier is also connected between the expansion valve and the compressor. The integrated internal circulation heat pump dryer with the above structure of the present invention, by setting the dehumidifier, not only plays a heat dissipation function, but also dehumidifies the humid air, improving the indoor drying effect. At the same time, by placing the internal circulation dryer with the dehumidifier indoors, the drying effect is not affected by the outdoor environment. However, the above heating method has the following defects: it takes a long time and has low drying efficiency.

[0003] Some other dryers use steam drying. The working efficiency of steam drying is high, but when using steam to heat the materials, the utilization rate of heat energy is low and the energy consumption is large.

[0004] Some other dryers adopt a combination of air energy heat source and steam heat source, but due to the unreasonable utilization of the two heat sources, they do not meet the requirements of energy conservation and environmental protection. Summary of the Invention

[0005] In order to overcome the above deficiencies, the purpose of the present invention is to provide an energy-saving and environment-friendly intelligent control dual-source energy-saving drying and steaming system.

[0006] Another purpose of the present invention is also to provide a method for drying materials using the intelligent control dual-source energy-saving drying and steaming system.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0008] An intelligent control dual-source energy-saving drying and steaming system includes a drying chamber, a steam generator, a three-way changeover valve, a first heat exchanger, a circulation fan, a compressor, a first changeover valve, a fourth heat exchanger, a second changeover valve, a third heat exchanger, and a second heat exchanger. Among them, one side of the fourth heat exchanger is provided with a cooling fan, and the steam generated by the steam generator heats the circulating air in the drying chamber through the first heat exchanger; the compressor, the first changeover valve, the fourth heat exchanger, the second changeover valve, and the third heat exchanger constitute a medium circulation dehumidification circuit for dehumidifying the circulating air in the drying chamber; the compressor, the first changeover valve, the second heat exchanger, the second changeover valve, and the third heat exchanger constitute a medium circulation dehumidification and heating circuit for dehumidifying and heating the circulating air in the drying chamber.

[0009] Further, it further includes a three-way directional valve and a cooking pot. The steam generator is connected to both the cooking pot and the first heat exchanger through the three-way directional valve.

[0010] Further, it further includes an integrated heat preservation box. The integrated heat preservation box is provided with an air return opening and an air outlet. The air return opening and the air outlet communicate with the drying chamber. The first heat exchanger, the second heat exchanger, and the third heat exchanger are arranged inside the integrated heat preservation box. The circulation fan is arranged inside the integrated heat preservation box and on one side of the third heat exchanger. Under the action of the circulation fan, the air in the drying chamber enters the integrated heat preservation box through the air return opening, is dehumidified by the third heat exchanger, and then discharged to the drying chamber through the second heat exchanger and the first heat exchanger from the air outlet.

[0011] Further, a main chassis is arranged on one side of the integrated heat preservation box. The compressor, the heat dissipation fan, and the fourth heat exchanger are arranged inside the main chassis.

[0012] Further, a water receiving tray is arranged under the third heat exchanger inside the integrated heat preservation box. A drain pipe is connected to the water receiving tray.

[0013] Further, it further includes a PLC controller, a temperature sensor, and a humidity sensor. The temperature sensor and the humidity sensor transmit the temperature information or humidity information in the drying chamber to the PLC controller. The PLC controller controls the direction change of the first three-way directional valve, the second three-way directional valve, and the third three-way directional valve, and controls the power on and off of the heat dissipation fan, the compressor, the circulation fan, and the steam generator.

[0014] Further, there are multiple drying chambers, and the multiple drying chambers adopt a parallel air circulation mode.

[0015] A method for drying materials using an intelligent control dual heat source energy-saving drying and cooking system includes the following steps:

[0016] Step S1: Place the materials to be dried into the drying chamber, close the door of the drying chamber, and make the drying chamber in a closed state.

[0017] Step S2: Start the PLC controller. The temperature sensor and the humidity sensor transmit the temperature information or humidity information in the drying chamber to the PLC controller. The PLC controller starts the circulation fan and the steam generator. The steam generated by the steam generator is conveyed to the first heat exchanger through the third three-way directional valve. The first heat exchanger heats the circulating air in the drying chamber. The PLC controller simultaneously starts the medium circulation dehumidification circuit, the compressor starts to work, and the third heat exchanger dehumidifies the circulating air in the drying chamber.

[0018] Step S3: When the temperature and humidity of the air in the drying chamber reach the set values, the PLC controller switches the heating mode: the PLC controller reverses the first reversing valve and the second reversing valve, so that the medium circulation dehumidification circuit stops working, and at the same time, the medium circulation dehumidification heating circuit starts to work. The second heat exchanger heats the circulating air in the drying chamber, and the third heat exchanger continues to dehumidify the circulating air in the drying chamber. At the same time, the PLC controller reverses the third reversing valve, so that the first heat exchanger stops heating the circulating air in the drying chamber, and the steam generator starts to supply heat to the cooking pot. When the drying reaches the set time, the drying work stops.

[0019] Further, it also includes step S4. When the drying reaches the set time, the PLC controller resets the first reversing valve and the second reversing valve.

[0020] The beneficial effects of the present invention are as follows:

[0021] The system of this patent adopts dual heat sources: air energy heat source and steam heat source, and is intelligently controlled by the PLC controller, realizing the complementary advantages of the dual heat sources. According to different drying time periods, different heating methods are adopted to make full use of the heat energy. The whole heat exchange takes place in a closed space without heat loss, and the full closed-loop circulation realizes the multi-purpose and high energy efficiency of the system. Compared with the prior art, energy conservation and environmental protection are the biggest features of this patent. Description of the Drawings

[0022] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the following drawings without creative efforts:

[0023] Figure 1 is a schematic structural diagram of the present invention;

[0024] Figure 2 is a flowchart of the present invention;

[0025] Figure 3 is Figure 1 the electrical connection diagram of the PLC controller shown.

[0026] In the figure: 1, drying chamber; 2, steam generator; 3, third reversing valve; 4, first heat exchanger; 5, circulation fan; 6, heat dissipation fan; 7, compressor; 8, first reversing valve; 9, fourth heat exchanger; 10, second reversing valve; 11, third heat exchanger; 12, second heat exchanger; 13, third reversing valve; 14, cooking pot; 15, integrated insulation box; 16, air return opening; 17, air outlet; 19, main chassis; 21, water receiving tray; 22, drain pipe; 23, PLC controller; 24, temperature sensor; 25, humidity sensor. Detailed Embodiments

[0027] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward rotation", "reverse rotation", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0029] As Figure 1 、 2 、shown in FIG. 3, an intelligent control dual heat source energy-saving drying and cooking system includes a drying chamber 1, a steam generator 2, a three-way valve 3, a first heat exchanger 4, a circulation fan 5, a compressor 7, a first reversing valve 8, a fourth heat exchanger 9, a second reversing valve 10, a third heat exchanger 11 and a second heat exchanger 12. Among them, a cooling fan 6 is provided on one side of the fourth heat exchanger 9, and the steam generated by the steam generator 2 heats the circulating air in the drying chamber 1 through the first heat exchanger 4; the compressor 7, the first reversing valve 8, the fourth heat exchanger 9, the second reversing valve 10 and the third heat exchanger 11 constitute a medium circulation dehumidification circuit for dehumidifying the circulating air in the drying chamber 1; the compressor 7, the first reversing valve 8, the second heat exchanger 12, the second reversing valve 10 and the third heat exchanger 11 constitute a medium circulation dehumidification and heating circuit for dehumidifying and heating the circulating air in the drying chamber 1. It further includes a three-way valve 13 and a cooking pot 14, and the steam generator 2 is connected to both the cooking pot 14 and the first heat exchanger 4 through the three-way valve 13.

[0030] It also includes an integrated heat preservation box 15, on which there are an air return port 16 and an air outlet 17. The air return port 16 and the air outlet 17 are communicated with the drying chamber 1. The first heat exchanger 4, the second heat exchanger 12, and the third heat exchanger 11 are arranged in the integrated heat preservation box 15. The circulation fan 5 is arranged in the integrated heat preservation box 15 and on one side of the third heat exchanger 11. Under the action of the circulation fan 5, the air in the drying chamber 1 enters the integrated heat preservation box 15 through the air return port 16, is dehumidified by the third heat exchanger 11, and then is discharged into the drying chamber 1 from the air outlet 17 through the second heat exchanger 12 and the first heat exchanger 4. One side of the integrated heat preservation box 15 is provided with a main chassis 19, and the compressor 7, the heat dissipation fan 6, and the fourth heat exchanger 9 are arranged in the main chassis 19. A water receiving tray 21 is arranged in the integrated heat preservation box 15 and below the third heat exchanger 11, and a drain pipe 22 is communicated with the water receiving tray 21.

[0031] This patent system also includes a PLC controller 23, a temperature sensor 24, a humidity sensor 25, and a pressure sensor. The temperature sensor 24 and the humidity sensor 25 transmit the temperature information or humidity information in the drying chamber 1 to the PLC controller 23. The PLC controller 23 controls the commutation of the first reversing valve 8, the second reversing valve 10, and the third reversing valve 3, and controls the power on / off of the heat dissipation fan 6, the compressor 7, the circulation fan 5, and the steam generator 2. In addition, the pressure sensor also transmits the pressure information in the closed system to the PLC controller 23.

[0032] There are multiple drying chambers 1, and the multiple drying chambers 1 adopt a parallel air circulation method. Several drying chambers carry out drying work simultaneously.

[0033] A method for drying materials using an intelligent control dual-heat-source energy-saving drying and steaming system includes the following steps:

[0034] Step S1: Put the materials to be dried into the drying chamber 1, close the door of the drying chamber, and make the drying chamber 1 in a closed state;

[0035] Step S2: Start the PLC controller 23. The temperature sensor 24 and the humidity sensor 25 transmit the temperature information or humidity information in the drying chamber to the PLC controller 23. The PLC controller 23 starts the circulation fan 5 and the steam generator 2. The steam generated by the steam generator 2 is conveyed to the first heat exchanger 4 through the third reversing valve 3, and the first heat exchanger 4 heats the circulating air in the drying chamber 1. The PLC controller 23 simultaneously starts the medium circulation dehumidification circuit, the compressor 7 starts to work, and the third heat exchanger 11 dehumidifies the circulating air in the drying chamber 1;

[0036] Step S3: When the temperature and humidity of the air in the drying chamber 1 reach the set values, the PLC controller 23 switches the heating mode: The PLC controller 23 reverses the first reversing valve 8 and the second reversing valve 10, so that the medium circulation dehumidification circuit stops working, and at the same time, the medium circulation dehumidification heating circuit starts to work. The second heat exchanger 12 heats the circulating air in the drying chamber, and the third heat exchanger 11 continues to dehumidify the circulating air in the drying chamber 1. At the same time, the PLC controller 23 reverses the third reversing valve 3, so that the first heat exchanger 4 stops heating the circulating air in the drying chamber 1, and the steam generator 2 starts to supply heat to the cooking pot 14. When the drying reaches the set time, the drying work stops.

[0037] Step S4: When the drying reaches the set time, the PLC controller 23 resets the first reversing valve 8 and the second reversing valve 10.

[0038] The system of this patent adopts dual heat sources: air energy heat source and steam heat source, and the PLC controller is used for intelligent energy control, realizing the complementary advantages of the dual heat sources. When the material just enters, more calorific value is needed, and the steam heat source is used for centralized heat supply to quickly raise the temperature. At the same time, the air energy system performs refrigeration and dehumidification to achieve the best dehumidification amount. When the humidity drops to a certain value (set by the user), the steam heat source is stopped and switched to the air energy heat source. At this time, the temperature has risen, and maintaining the temperature no longer requires a large amount of heat. In this way, a small-power air energy can drive several large drying chambers, and the air energy heat source can be in the heating and dehumidification states at the same time, and several drying chambers can carry out drying work simultaneously. The switched steam heat source supplies heat to the cooking pot and can be used for the cooking work before drying. The entire heat exchange is carried out in a closed space without heat loss, and it is a full-closed loop circulation, realizing the multi-purpose and high energy efficiency of the system.

[0039] In addition, under the condition of not being mutually contradictory, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An intelligent control dual-heat-source energy-saving drying and cooking system, characterized in that: It includes a drying chamber, a steam generator, a three-way valve, a first heat exchanger, a circulation fan, a compressor, a first reversing valve, a fourth heat exchanger, a second reversing valve, a third heat exchanger and a second heat exchanger. Among them, a heat dissipation fan is provided on one side of the fourth heat exchanger. The steam generated by the steam generator heats the circulating air in the drying chamber through the first heat exchanger. The compressor, the first reversing valve, the fourth heat exchanger, the second reversing valve and the third heat exchanger form a medium circulation dehumidification circuit for dehumidifying the circulating air in the drying chamber. The compressor, the first reversing valve, the second heat exchanger, the second reversing valve and the third heat exchanger form a medium circulation dehumidification and heating circuit for dehumidifying and heating the circulating air in the drying chamber. It also includes a third reversing valve and a cooking pot. The steam generator is connected to the cooking pot and the first heat exchanger through the third reversing valve at the same time. It further includes an integrated insulation box with an air return port and an air outlet. The air return port and the air outlet communicate with the drying chamber. The first heat exchanger, the second heat exchanger and the third heat exchanger are arranged in the integrated insulation box. The circulation fan is arranged in the integrated insulation box and on one side of the third heat exchanger. Under the action of the circulation fan, the air in the drying chamber enters the integrated insulation box through the air return port, is dehumidified by the third heat exchanger, and then discharged to the drying chamber from the air outlet through the second heat exchanger and the first heat exchanger. A main chassis is provided on one side of the integrated insulation box, and the compressor, the heat dissipation fan and the fourth heat exchanger are arranged in the main chassis. A water receiving tray is arranged in the integrated insulation box and below the third heat exchanger, and a drain pipe is connected to the water receiving tray. It also includes a PLC controller, a temperature sensor and a humidity sensor. The temperature sensor and the humidity sensor transmit the temperature information or humidity information in the drying chamber to the PLC controller. The PLC controller controls the reversing of the first reversing valve, the second reversing valve and the third reversing valve, and controls the power on and off of the heat dissipation fan, the compressor, the circulation fan and the steam generator. There are multiple drying chambers, and the multiple drying chambers adopt a parallel air circulation mode.

2. The intelligent control dual heat source energy-saving drying and cooking system according to claim 1, characterized in that: Step S1: Place the material to be dried in the drying chamber, close the door of the drying chamber to make the drying chamber in a closed state; Step S2: Start the PLC controller. The temperature sensor and the humidity sensor transmit the temperature information or humidity information in the drying chamber to the PLC controller. The PLC controller starts the circulation fan and the steam generator. The steam generated by the steam generator is conveyed to the first heat exchanger through the third reversing valve. The first heat exchanger heats the circulating air in the drying chamber. The PLC controller simultaneously starts the above-mentioned medium circulation dehumidification circuit, the compressor starts to work, and the third heat exchanger dehumidifies the circulating air in the drying chamber; Step S3: When the temperature and humidity of the air in the drying chamber reach the set values, the PLC controller switches the heating mode: The PLC controller reverses the first reversing valve and the second reversing valve, causing the medium circulation dehumidification circuit to stop working, and at the same time causing the medium circulation dehumidification heating circuit to start working. The second heat exchanger heats the circulating air in the drying chamber, and the third heat exchanger continues to dehumidify the circulating air in the drying chamber. At the same time, the PLC controller reverses the third reversing valve, causing the first heat exchanger to stop heating the circulating air in the drying chamber, and causing the steam generator to start heating the cooking pot. When the drying reaches the set time, the drying work is stopped.

3. The intelligent control dual heat source energy-saving drying and cooking system according to claim 2, wherein: It also includes step S4. When the drying reaches the set time, the PLC controller resets the first reversing valve and the second reversing valve.

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