Static drying device and method for grain products with temperature and humidity control function

Abstract

The present invention belongs to the technical field of grain product drying equipment, and specifically relates to a static grain product drying equipment and method with temperature and humidity control functions, the drying equipment comprising a closed drying chamber, a chamber door and a controller being installed in the front end surface of the drying chamber in the X direction; a thermometer and hygrometer being installed in the drying chamber, and being communicatively connected with the controller; an air circulation device being installed in the drying chamber, and air circulation in the drying chamber in the X direction, Y direction and Z direction can be realized through the air circulation device; a resistance heating device being installed in the upper part of the drying chamber, and being connected with an external power supply wire and being communicatively connected with the controller; compared with the prior art, the advantages and positive effects of the present invention are as follows: in the present invention, by installing a jet fan on a fan frame, the blowing direction can be changed according to the type of grain product to be dried, thereby generating a variety of air circulation modes; when the jet fan on the cantilever part blows air downward, the wind guide plate can change the vertical wind into horizontal wind.

Description

Technical Field

[0001] The invention belongs to the technical field of grain product drying equipment, and in particular relates to a grain product static drying equipment and method with temperature and humidity control functions. Background Art

[0002] Grain products cover a wide range, including all kinds of food processed with whole grains as raw materials. These foods include not only rice, wheat, corn, and other grains, such as corn, millet, black rice, buckwheat, oats, barley rice, sorghum, etc., but also ready-to-eat cereals, such as instant oatmeal, mixed grain powder, etc., and also include flour products, such as whole wheat steamed bread, whole wheat bread, whole wheat noodles, etc.

[0003] Rice, wheat, corn and other grains are generally placed on a drying tray during the drying process, and the drying process requires a horizontal blowing mode; while strip foods such as noodles are generally hung on a drying rack during the drying process, and the drying process requires a vertical blowing mode. Existing dryers cannot achieve the conversion between horizontal and vertical blowing modes, so different drying equipment is required for drying grain products. Summary of the invention

[0004] The present invention aims to solve the technical problem that the dryer in the prior art cannot realize the conversion between the horizontal blowing mode and the vertical blowing mode, and provides a static drying device and method for grain products with temperature and humidity control functions.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a static drying device for grain products with temperature and humidity control function, comprising a closed drying chamber, wherein a chamber door and a controller are installed on the front face of the drying chamber in the X direction; a thermometer and hygrometer are installed in the drying chamber, and the thermometer and hygrometer are in communication connection with the controller;

[0006] The drying chamber is equipped with an air circulation device, through which air can circulate in the X, Y and Z directions in the drying chamber; a resistance heating device is installed in the upper part of the drying chamber, and the resistance heating device is connected to an external power supply wire and is in communication connection with a controller;

[0007] A dehumidification air pipe is installed on the top of the drying chamber, and an air valve 1 is installed on the dehumidification air pipe, and the air valve 1 is communicatively connected with the controller.

[0008] Preferably, a support frame is installed in the drying chamber, and the support frame includes an upper horizontal frame and two lower vertical frames, the horizontal frame and the vertical frames are fixedly or detachably connected, and the two vertical frames are respectively located on both sides of the Y direction in the drying chamber; the Y-direction length of the horizontal frame is greater than the spacing between the two vertical frames, and the two ends of the horizontal frame are respectively cantilever part one and cantilever part two; when drying, the grain products are placed inside the support frame.

[0009] Preferably, a fan rack is rollingly or slidingly connected to the cross frame of the support frame, and the fan rack can reciprocate along the guide rail on the cross frame in the X direction; the length direction of the fan rack is parallel to the Y direction, and a plurality of jet fans are evenly and vertically installed in the length direction of the fan rack; a jet fan is vertically installed on the cantilever part one and the cantilever part two respectively; the plurality of jet fans are electrically connected to an external power supply respectively, and are communicatively connected to the controller respectively.

[0010] Preferably, a plurality of inclined air guide plates 1 are installed from bottom to top below the cantilever part 1, and a plurality of inclined air guide plates 2 are installed from bottom to top below the cantilever part 2, and the air guide plates 1 and 2 are symmetrical with respect to the Y-direction center line of the drying chamber.

[0011] Preferably, in horizontal projection, the plurality of air guide plates are flush with one end close to the grain product, and one end of the air guide plate below the end away from the grain product exceeds one end of the air guide plate above.

[0012] Preferably, a centrifugal blower is installed at the center of the side of the drying chamber away from the door in the X direction, and an air inlet is opened in the center of the volute body of the centrifugal blower, and the air inlet is connected to two air inlet pipes; the ends of the two air inlet pipes away from the air inlet of the centrifugal blower respectively extend to the side of the drying chamber close to the door in the X direction, and the ends of the two air inlet pipes are respectively at both ends in the Y direction;

[0013] The exhaust port of the centrifugal blower is upward, and a vertical exhaust pipe is installed at the exhaust port, and a three-way ball valve is installed at the upper end of the exhaust pipe; the three-way ball valve includes two inlets and one outlet, and the two inlets are respectively connected to the exhaust pipe and the external dry air, and the outlet is connected to an air pipe, and the end of the air pipe away from the three-way ball valve is located at the upper part of the drying room on the X-direction away from the door.

[0014] Preferably, the resistance heating device comprises a resistance wire coiled and mounted above a horizontal frame, the air pipe is located above the resistance wire, and the fan frame is located below the resistance wire.

[0015] Preferably, the cantilevered portion 1 and the cantilevered portion 2 are respectively provided with drainage covers, and the drainage covers are located above the resistance wire.

[0016] A static drying method for grain products, using the static drying equipment for grain products with temperature and humidity control function to dry the grain products, comprises the following contents:

[0017] The food products are placed in the support frame and the door is closed; the target temperature and humidity in the drying chamber are set by the controller and the resistance heating device is controlled to work; the air circulation device is used to realize the circulation of air in the X, Y and Z directions in the drying chamber;

[0018] When the humidity in the drying room is greater than the set value, the dehumidification operation is performed, the air valve on the dehumidification air pipe is opened, and the external dry air enters the drying room through the three-way ball valve;

[0019] When the humidity in the drying room is not greater than the set value, the hot air is circulated internally. Once the air valve on the dehumidification air pipe is closed, the centrifugal blower draws the air from the lower part of the drying room in the X direction close to the door to the exhaust pipe, and then through the three-way ball valve and the air pipe to the upper part of the drying room in the X direction away from the door; at the same time, the controller controls the fan frame to move back and forth along the X direction.

[0020] As a preferred embodiment, when the food products are placed on the multi-layer baking tray for drying, the controller is used to control the jet fan on the cantilever part 1 to blow air toward the lower air guide plate 1, and the jet fan on the cantilever part 2 to suck air upward, and the other jet fans are not operated; the downward wind passes through the air guide plate 1 and becomes Y-direction horizontal wind to blow toward the food products on the baking tray, and then passes through the air guide plate 2 and becomes upward wind and enters the jet fan on the cantilever part 2; due to the effect of the drainage hood, the wind blown out by the jet fan on the cantilever part 2 flows toward the air outlet on the upper part of the jet fan on the cantilever part 1;

[0021] When drying grain products hung on multiple drying racks, the jet fans on the cantilever part one and / or the cantilever part two suck air upward, and other jet fans on the fan rack blow air downward; or the jet fans on the cantilever part one and the cantilever part two do not operate, some jet fans in the middle area of ​​the fan rack blow air downward, and other jet fans in the middle area of ​​the fan rack suck air upward.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] (1) When the food products are placed on the multi-layer baking tray for drying, the controller is used to control the jet fan on the cantilever part 1 to blow air toward the air guide plate 1 below, and the jet fan on the cantilever part 2 to suck air upward, and the other jet fans are not operated; the downward wind passes through the air guide plate 1 and becomes Y-direction horizontal wind to blow toward the food products on the baking tray;

[0024] (2) When drying food products hung on multiple drying racks, the jet fans on the cantilever part 1 and / or the cantilever part 2 suck air upward, and other jet fans on the fan rack blow air downward; or the jet fans on the cantilever part 1 and the cantilever part 2 do not operate, some jet fans in the middle area of ​​the fan rack blow air downward, and other jet fans in the middle area of ​​the fan rack suck air upward;

[0025] (3) In the present invention, by installing a jet fan on the fan frame, the blowing direction can be changed according to the type of food products to be dried, thereby generating a variety of air circulation modes;

[0026] (4) When the jet fan on the cantilever blows air downward, the wind guide plate can change the vertical wind into horizontal wind; when the jet fan on the cantilever sucks air upward, the wind guide plate plays a role in guiding the air upward;

[0027] (5) The present invention realizes the switching between the external circulation and the internal circulation of the drying chamber air through the three-way ball valve. When it is necessary to discharge moisture, the outdoor dry air enters the drying chamber through the three-way ball valve; when it is not necessary to discharge moisture, the centrifugal blower draws the air from the lower part of the X-direction near the door side of the drying chamber to the upper part of the X-direction away from the door side;

[0028] (6) The controller controls the fan frame to move back and forth along the X direction to improve the uniformity of temperature and humidity in the drying room. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following is a brief introduction to the drawings required for describing the embodiment:

[0030] Figure 1 This is the front view of the static drying equipment for grain products with temperature and humidity control function;

[0031] Figure 2 This is the left view of the static drying equipment for grain products with temperature and humidity control function;

[0032] Figure 3 It is a top view of a static drying equipment for grain products with temperature and humidity control function;

[0033] Figure 4 It is a three-dimensional diagram of a static drying equipment for grain products with temperature and humidity control function;

[0034] Figure 5 A three-dimensional diagram of the internal structure of a static drying equipment for grain products with temperature and humidity control functions;

[0035] Figure 6 This is a schematic diagram of an air guide plate in a static drying equipment for grain products with temperature and humidity control functions.

[0036] Description of reference numerals:

[0037] 1-drying room, 2-drying air pipe, 3-door, 4-controller, 5-centrifugal blower;

[0038] 61 - air intake pipe, 62 - exhaust pipe, 63 - air pipe;

[0039] 7—support frame, 71—cantilever part 1, 72—cantilever part 2;

[0040] 8—fan frame, 9—jet fan, 10—three-way ball valve, 11—drainage hood, 12—resistance heating device, 13—air guide plate 1, 14—air guide plate 2. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0043] Example 1

[0044] Combine the following Figure 1-Figure 6 The static drying device for grain products with temperature and humidity control function in Example 1 is further described as follows: Figure 1-Figure 5 As shown, it includes a closed drying chamber 1, and a door 3 and a controller 4 are installed on the front end surface of the drying chamber 1X; a thermometer and hygrometer are installed in the drying chamber 1, and the thermometer and hygrometer are communicatively connected with the controller 4.

[0045] like Figure 5 As shown, the drying chamber 1 is equipped with an air circulation device, through which air can circulate in the X, Y and Z directions in the drying chamber 1; a resistance heating device 12 is installed in the upper part of the drying chamber 1, and the resistance heating device 12 is connected to an external power supply wire and is in communication connection with the controller 4.

[0046] like Figure 1-Figure 5 As shown, a dehumidification air pipe 2 is installed on the top of the drying chamber 1, and an air valve 1 is installed on the dehumidification air pipe 2, and the air valve 1 is communicated with the controller 4.

[0047] like Figure 5 As shown, a support frame 7 is installed in the drying chamber 1, and the support frame 7 includes an upper horizontal frame and two lower vertical frames, the horizontal frame and the vertical frames are fixedly or detachably connected, and the two vertical frames are respectively located on both sides of the Y direction in the drying chamber 1; the Y-direction length of the horizontal frame is greater than the spacing between the two vertical frames, and the two ends of the horizontal frame are respectively cantilevered portion 1 71 and cantilevered portion 2 72; during drying, the grain products are placed inside the support frame 7.

[0048] like Figure 5As shown, a fan frame 8 is rollingly connected to the cross frame of the support frame 7 (groove-shaped guide rails are installed at both ends of the cross frame in the Y direction, rollers are installed at the corresponding positions of the fan frame 8 and the groove-shaped guide rails, and a roller driving device is installed on the fan frame 8 to drive the rollers to roll in the groove-shaped guide rails), and the fan frame 8 can reciprocate along the guide rails on the cross frame in the X direction; the length direction of the fan frame 8 is parallel to the Y direction, and a plurality of jet fans 9 are evenly and vertically installed in the length direction of the fan frame 8 (when the impellers of the jet fans 9 rotate in opposite directions, the blowing and suction directions are reversed); a jet fan 9 is vertically installed on the cantilever part 1 71 and the cantilever part 2 72 respectively; the plurality of jet fans 9 are electrically connected to the external power supply respectively, and are respectively communicatively connected to the controller 4.

[0049] like Figure 5 and Figure 6 As shown, a plurality of inclined air guide plates 13 are installed from bottom to top below the cantilever portion 1 71 , and a plurality of inclined air guide plates 2 14 are installed from bottom to top below the cantilever portion 2 72 . The air guide plates 13 and 14 are symmetrical with respect to the Y-direction center line of the drying chamber 1 .

[0050] like Figure 6 As shown, in horizontal projection, the plurality of air guide plates 13 are flush with one end close to the grain product, and the end of the air guide plate 13 below the end away from the grain product exceeds the end of the air guide plate 13 above.

[0051] like Figure 1-Figure 5 As shown, a centrifugal blower 5 is installed at the center of the side of the drying chamber 1X away from the door 3, and an air inlet is opened in the center of the volute body of the centrifugal blower 5, and the air inlet is connected to two air inlet pipes 61; the ends of the two air inlet pipes 61 away from the air inlet of the centrifugal blower 5 respectively extend to the side of the drying chamber 1X close to the door 3, and the ends of the two air inlet pipes 61 are respectively at the two ends of the Y direction.

[0052] like Figure 5 As shown, the exhaust port of the centrifugal blower 5 is upward, and a vertical exhaust pipe 62 is installed at the exhaust port, and a three-way ball valve 10 is installed at the upper end of the exhaust pipe 62; the three-way ball valve 10 includes two inlets and one outlet, the two inlets are respectively connected to the exhaust pipe 62 and the external dry air, and the outlet is connected to the air pipe 63, and the end of the air pipe 63 away from the three-way ball valve 10 is located in the upper part of the drying chamber 1 on the X-direction away from the door 3.

[0053] like Figure 5 As shown, the resistance heating device 12 includes a resistance wire coiled and mounted above a horizontal frame, the air pipe 63 is located above the resistance wire, and the fan frame 8 is located below the resistance wire.

[0054] like Figure 5 As shown, the cantilevered portion 1 71 and the cantilevered portion 2 72 are respectively installed with a drainage cover 11, and the drainage cover 11 is located above the resistance wire.

[0055] A static drying method for grain products, using the above-mentioned static drying equipment for grain products with temperature and humidity control function to dry the grain products, includes the following contents:

[0056] Place the grain products in the support frame 7, and then close the door 3; use the controller 4 to set the target temperature and humidity in the drying chamber 1, and then control the resistance heating device 12 to work; realize the air circulation in the drying chamber 1 in the X, Y and Z directions through the air circulation device.

[0057] When the humidity in the drying chamber 1 is greater than the set value, the dehumidification operation is performed, the air valve on the dehumidification air pipe 2 is opened, and the external dry air enters the drying chamber 1 through the three-way ball valve 10 at the same time.

[0058] When the humidity in the drying chamber 1 is not greater than the set value, the hot air internal circulation operation is performed. Once the air valve on the dehumidification air pipe 2 is closed, the centrifugal blower 5 draws the air in the drying chamber 1 in the X direction near the lower part of the door 3 to the exhaust pipe 62, and then through the three-way ball valve 10 and the air pipe 63 to the upper part of the drying chamber 1 in the X direction away from the door 3; at the same time, the controller 4 controls the fan frame 8 to move back and forth along the X direction.

[0059] When drying grain products (such as rice, millet and corn, etc.) placed on the multi-layer baking tray, the controller 4 is used to control the jet fan 9 on the cantilever part 71 to blow air toward the wind guide plate 13 below, and the jet fan 9 on the cantilever part 72 sucks air upward, and other jet fans 9 do not operate; the downward wind passes through the wind guide plate 13 and becomes Y-direction horizontal wind to blow toward the grain products on the baking tray, and then passes through the wind guide plate 2 14 and becomes the upward direction of the Y-direction horizontal wind and then enters the jet fan 9 on the cantilever part 72; due to the effect of the drainage hood 11, the wind blown out by the jet fan 9 on the cantilever part 72 flows to the upper air outlet of the jet fan 9 on the cantilever part 71.

[0060] When drying grain products (such as noodles) hung on multiple drying racks, the jet fans 9 on the cantilever part 1 71 and / or the cantilever part 2 72 suck air upward, and other jet fans 9 on the fan frame 8 blow air downward; or the jet fans 9 on the cantilever part 1 71 and the cantilever part 2 72 do not operate, some of the jet fans 9 in the middle area of ​​the fan frame 8 blow air downward, and other jet fans 9 in the middle area of ​​the fan frame 8 suck air upward.

[0061] Example 2

[0062] The difference between this embodiment and embodiment 1 is that the fan frame 8 is slidably connected to the horizontal frame of the support frame 7, linear guide rails are installed at both ends of the horizontal frame Y, sliders are installed at the corresponding positions of the fan frame 8 and the linear guide rails, and the sliders are slidably connected to the linear guide rails; a ball screw is installed at the middle position of the horizontal frame Y, and a ball screw nut is installed at the corresponding position of the fan frame 8 and the ball screw, and the ball screw nut cooperates with the ball screw.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A static drying device for grain products with temperature and humidity control function, characterized in that: It comprises a closed drying chamber (1), wherein a chamber door (3) and a controller (4) are installed on the front face of the drying chamber (1) in the X direction; a thermometer and hygrometer are installed in the drying chamber (1), and the thermometer and hygrometer are in communication connection with the controller (4); The drying chamber (1) is equipped with an air circulation device, through which air can be circulated in the drying chamber (1) in the X direction, the Y direction and the Z direction; a resistance heating device (12) is installed in the upper part of the drying chamber (1), and the resistance heating device (12) is connected to an external power supply wire and is in communication connection with the controller (4); A dehumidification air pipe (2) is installed on the top of the drying chamber (1), and a first air valve is installed on the dehumidification air pipe (2), and the first air valve is communicatively connected with the controller (4); A support frame (7) is installed in the drying chamber (1), and the support frame (7) includes an upper horizontal frame and two lower vertical frames, the horizontal frame and the vertical frames are fixedly or detachably connected, and the two vertical frames are respectively located on both sides of the drying chamber (1) in the Y direction; the Y-direction length of the horizontal frame is greater than the spacing between the two vertical frames, and the two ends of the horizontal frame are respectively cantilevered portion 1 (71) and cantilevered portion 2 (72); when drying, the grain products are placed inside the support frame (7); A fan frame (8) is rollingly or slidingly connected to the cross frame of the support frame (7), and the fan frame (8) can reciprocate along the guide rail on the cross frame in the X direction; the length direction of the fan frame (8) is parallel to the Y direction, and a plurality of jet fans (9) are evenly and vertically installed in the length direction of the fan frame (8); a jet fan (9) is vertically installed on each of the cantilevered portion 1 (71) and the cantilevered portion 2 (72); the plurality of jet fans (9) are electrically connected to an external power supply, and are respectively in communication connection with the controller (4); A plurality of inclined air guide plates (13) are installed from bottom to top below the cantilevered portion (71), and a plurality of inclined air guide plates (14) are installed from bottom to top below the cantilevered portion (72), wherein the air guide plates (13) and the air guide plates (14) are symmetrical with respect to the Y-direction center line of the drying chamber (1).

2. The static drying equipment for grain products with temperature and humidity control function according to claim 1 is characterized in that: In horizontal projection, the plurality of air guide plates (13) are flush with one end close to the grain product, and the end of the air guide plate (13) below the end away from the grain product exceeds the end of the air guide plate (13) above.

3. The static drying equipment for grain products with temperature and humidity control function according to claim 2 is characterized in that: A centrifugal blower (5) is installed at the center of the side of the drying chamber (1) away from the chamber door (3) in the X direction, and an air inlet is opened in the center of the volute body of the centrifugal blower (5), and the air inlet is connected to two air inlet pipes (61); the ends of the two air inlet pipes (61) away from the air inlet of the centrifugal blower (5) respectively extend to the side of the drying chamber (1) close to the chamber door (3) in the X direction, and the ends of the two air inlet pipes (61) are respectively located at two ends in the Y direction; The exhaust port of the centrifugal blower (5) faces upwards, and a vertical exhaust pipe (62) is installed at the exhaust port. A three-way ball valve (10) is installed at the upper end of the exhaust pipe (62); the three-way ball valve (10) comprises two inlets and one outlet, the two inlets are respectively connected to the exhaust pipe (62) and external dry air, and the outlet is connected to an air pipe (63), and the end of the air pipe (63) away from the three-way ball valve (10) is located at the upper part of the drying chamber (1) on the side away from the chamber door (3) in the X direction.

4. The static drying equipment for grain products with temperature and humidity control function according to claim 3 is characterized in that: The resistance heating device (12) comprises a resistance wire coiled and mounted above a horizontal frame, the air pipe (63) is located above the resistance wire, and the fan frame (8) is located below the resistance wire.

5. The static drying equipment for grain products with temperature and humidity control function according to claim 4 is characterized in that: The first cantilevered portion (71) and the second cantilevered portion (72) are respectively provided with a flow guide cover (11), and the flow guide cover (11) is located above the resistance wire.

6. A static drying method for grain products, characterized in that: Drying grain products using the static grain product drying equipment with temperature and humidity control function as claimed in claim 5 includes the following contents: The food product is placed in the support frame (7), and then the door (3) is closed; the target temperature and humidity in the drying chamber (1) are set by using the controller (4), and then the resistance heating device (12) is controlled to work; and the air circulation device is used to realize the circulation of air in the drying chamber (1) in the X direction, the Y direction and the Z direction; When the humidity in the drying chamber (1) is greater than a set value, a dehumidification operation is performed, the air valve on the dehumidification air pipe (2) is opened, and external dry air enters the drying chamber (1) through the three-way ball valve (10); When the humidity in the drying chamber (1) is not greater than the set value, the hot air internal circulation operation is performed. Once the air valve on the dehumidification air pipe (2) is closed, the centrifugal blower (5) guides the air in the lower part of the drying chamber (1) in the X direction close to the door (3) to the exhaust pipe (62), and then guides the air through the three-way ball valve (10) and the air pipe (63) to the upper part of the drying chamber (1) in the X direction away from the door (3); at the same time, the controller (4) controls the fan frame (8) to move back and forth along the X direction.

7. The static drying method for grain products according to claim 6, characterized in that: When the food products are placed on the multi-layer baking tray for drying, the controller (4) is used to control the jet fan (9) on the first cantilever part (71) to blow air toward the first air guide plate (13) below, and the jet fan (9) on the second cantilever part (72) to suck air upward, while the other jet fans (9) do not operate; the downward wind passes through the first air guide plate (13) and becomes Y-direction horizontal wind to blow toward the food products on the baking tray, and then passes through the second air guide plate (14) and becomes the Y-direction horizontal wind to go upward and enter the jet fan (9) on the second cantilever part (72); due to the effect of the air guide cover (11), the wind blown out by the jet fan (9) on the second cantilever part (72) flows toward the air outlet on the upper part of the jet fan (9) on the first cantilever part (71); When drying food products hung on multiple drying racks, the jet fans (9) on the cantilever part one (71) and / or the cantilever part two (72) suck air upwards, while other jet fans (9) on the fan frame (8) blow air downwards; or the jet fans (9) on the cantilever part one (71) and the cantilever part two (72) do not operate, some of the jet fans (9) in the middle area of ​​the fan frame (8) blow air downwards, while other jet fans (9) in the middle area of ​​the fan frame (8) suck air upwards.

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