CN115707398A - Dehumidifying heat exchange structure - Google Patents

Abstract

The invention discloses a heat exchanging structure for dehumidification, which belongs to the heat exchanging structure, comprising a mounting base and several stacked heat exchanging plates, the heat exchanging plates include a first heat exchanging plate and a second heat exchanging plate stacked at intervals, The temperature of the gas passing through the first heat exchange plate is lower than the temperature of the gas passing through the second heat exchange plate, and the heat exchange plate is provided with several ventilation grooves passing through its two opposite sides. The air in the room passes through the first heat exchange plate, and the air that needs to be discharged from the drying room passes through the second heat exchange plate. The gas in the first heat exchange plate and the second heat exchange plate exchanges heat at the heat exchange assembly, so that the required The energy required to raise the temperature of the fed gas to the baking temperature in the drying room is reduced, thereby realizing energy saving and solving the problems of high cost and insufficient energy saving effect of the existing heat exchange structure.

Description

A heat exchange structure for dehumidification

technical field

The invention relates to a heat exchange structure, in particular to a heat exchange structure for dehumidification.

Background technique

In the baking process, it is generally only necessary to put the product to be baked in a closed drying room for a period of time, and for the baking of some products with high water content, such as fruits and vegetables, tobacco leaves, herbs, etc. During the process, it is necessary to continuously discharge the water vapor in the drying room to avoid affecting the baking efficiency. However, in the process of discharging the water vapor in the drying room, the heat in the drying room will also be discharged, resulting in It is necessary to maintain high-power heating inside to maintain the baking temperature, which greatly increases energy consumption. In order to reduce energy consumption, it is necessary to exchange heat between the exhausted gas and the gas introduced from the outside through a heat exchange structure, thereby reducing heat loss. , to achieve energy saving.

For example, the "Tobacco Leaf Dryer and Tobacco Leaf Drying Room" disclosed in the Chinese patent literature has a notification number of CN105495673B, which includes a casing and a compressor, a mixing condenser, an evaporator, and a throttling device arranged in the casing. , wherein, the compressor, the mixing condenser, the evaporator and the throttling device are connected through pipelines to form a circulation system; the evaporator is set towards the outside of the tobacco leaf drying room, and the evaporator is equipped with an evaporator heat exchange fan; the mixing condenser is facing the tobacco leaf drying room. It is set inside the room, and a drying circulation heat exchange fan is installed at the mixing condenser. It has changed the energy consumption mode of the traditional coal fuel heating tobacco drying mode, which can save energy, reduce emissions and reduce environmental pollution, and avoid the hidden dangers of production safety in the traditional coal fuel heating drying mode, and can realize the The precise control of temperature and humidity in the tobacco leaf drying room avoids the problem of affecting the quality of the tobacco leaves due to the loss of essence during the drying process of the tobacco leaves due to exhaust air and dehumidification, thus ensuring the quality of the finished tobacco leaves; the shortcoming of this patent is that it needs to be mixed Condensation is used to reduce the energy consumption of the drying room. Equipment such as compressors, condensers, and evaporators are used, and the cost is relatively high. Moreover, these equipment themselves will also generate a lot of energy consumption, and the actual energy-saving effect is not good.

Another example, the "Environmental Protection and Energy Saving Tobacco Leaf Heat Pump Drying Room" disclosed in the Chinese patent literature, its announcement number is CN208016890U, includes a drying room, the drying room includes a drying chamber, and the drying room is provided with a drying chamber communicated with the drying chamber. The hot air inlet and the hot air circulation outlet are characterized in that: the environmental protection and energy-saving tobacco leaf heat pump drying room also includes a motor, a coupling, a rotating shaft, a turntable, a circular bracket, a rib and an elastic sheet arranged in the drying chamber. In the above-mentioned drying chamber, a groove is set at the bottom of the drying room, and the motor is fixedly arranged in the groove. The motor includes a motor shaft, which is linked to the rotating shaft through a coupling, and a turntable linked with the rotating shaft is set on the rotating shaft. The axis line of the rotating shaft, the axis line of the rotating shaft and the axis line of the motor shaft are on the same straight line and are respectively parallel to the vertical line. The upper surface of the turntable is fixed with a circular bracket, and the outer circumference of the circular bracket is fixed with The number is more than 2 convex ribs, and the convex ribs are welded to the circular bracket. In the drying chamber, one end of the elastic sheet is fixedly connected to the drying room, and the other end of the elastic sheet is in contact with one of the convex ribs. The air-energy heat pump in the tobacco leaf heat pump drying room uses the reverse Carnot principle to absorb the free heat in the air by inputting a small amount of electric energy and transfer it to the drying warehouse to increase the temperature of the drying room and cooperate with the corresponding dehumidification and dehumidification. The equipment realizes the drying of materials; the shortcoming of this patent is that it mainly uses the heat energy in the air to provide the function of the drying room, and the temperature of the outside air changes greatly with the weather and seasons, and the effect is not stable in actual use. , and additional dehumidification and dehumidification equipment is needed to cooperate, the cost is high, and the effect is not good.

Contents of the invention

The purpose of the present invention is to overcome the problems of high cost and insufficient energy-saving effect of the existing heat exchange structure in the baking process, and provide a heat exchange structure for dehumidification, which can realize the dehumidification of the drying room in an energy-saving manner, and the cost is relatively low. Low, the effect of energy saving is better.

In order to achieve the above object, the present invention adopts the following technical solutions:

The present invention relates to a heat exchange structure for dehumidification, which includes a mounting seat and several stacked heat exchange plates, the heat exchange plates include a first heat exchange plate and a second heat exchange plate stacked at intervals, the first heat exchange plate The temperature of the gas passing through the plate is lower than the temperature of the gas passing through the second heat exchange plate. The heat exchange plate is provided with several ventilation grooves passing through its two opposite sides. The mounting base is provided with a first inlet Air port, first air outlet, second air inlet, second air outlet, the two ends of the air groove of the first heat exchange plate communicate with the first air inlet and the first air outlet respectively, the second The two ends of the ventilation groove of the heat exchange plate communicate with the second air inlet and the second air outlet respectively, and the structure of the first heat exchange plate is the same as that of the second heat exchange plate.

When using the heat exchange structure described in this patent, the air that needs to pass into the drying room passes through the first heat exchange plate, the air that needs to be discharged from the drying room passes through the second heat exchange plate, the first heat exchange plate and the second heat exchange plate. The gas in the heat exchange plate exchanges heat at the heat exchange component, so that the temperature of the air discharged from the drying room drops, and the temperature of the air that needs to pass into the drying room rises, because the gas entering the drying room has already passed through the heat exchange component. After heating up, the energy required to heat up to the baking temperature in the drying room is reduced, thereby realizing energy saving, and because heat exchange can be realized through the stacking of heat exchange plates, the cost is relatively low. The first The heat exchange plate and the second heat exchange plate have the same structure and can be mass-produced, and the stacking tightness of the heat exchange plates can be adjusted by the number of stacked heat exchange plates.

As a preference, the included angle between the direction of the ventilation slots of the second heat exchange plate and the horizontal direction is 15°-60°, and the temperature of the high-temperature gas from the drying room will drop rapidly during the heat exchange process. Condensation will occur, thereby forming more droplets in the second heat exchange plate, by setting the direction of the ventilation groove of the second heat exchange plate at an angle of 15°-60° with the horizontal direction, it is convenient for the liquid droplets to flow The slide out of the heat exchange plate is accelerated under the action of gravity, thereby reducing the wind resistance to the airflow.

Preferably, the heat exchange assembly further includes a beating assembly located among several heat exchange plates, and the beating assembly is used to vibrate the heat exchange plates to help the water droplets in the second heat exchange plate slide down; plate to help the water droplets in the second heat exchange plate slide down, which can further reduce the water droplets retained in the heat exchange plate, thereby reducing wind resistance.

Preferably, the hitting assembly includes several impellers, the impellers are provided with elastic blades for hitting the heat exchange plate, and the rotation axis direction of the impeller is the same as the length direction of the ventilation slot of the first heat exchange plate; The impeller rotates after receiving the force of the air flow, and the elastic blades hit the heat exchange plate to cause vibration, without additional driving, and can be completed only by the kinetic energy of the air flow, and the cost is low.

Preferably, the striking assembly further includes two positioning plates: a first positioning plate and a second positioning plate, the first positioning plate is flush with the side of the heat exchange plate facing the second air inlet, the first positioning plate The second positioning plate is flush with the side of the heat exchange plate facing the second air outlet. There are several installation rods installed at intervals between the two heat exchange plates and perpendicular to the heat exchange plate. There are several impellers, and the structure facilitates the installation of the striking assembly.

Preferably, the length direction of the ventilation slots of the first heat exchange plate and the length direction of the ventilation slots of the second heat exchange plate are perpendicular to each other; this structure makes the movement directions of the gas entering from the outside and the gas discharged from the drying room perpendicular to each other, Firstly, the area utilization rate of the heat exchange plate can be improved, thereby saving space; secondly, the air in a single ventilation slot can be in contact with the air passing through as many ventilation slots as possible, so that the heat exchange is more sufficient and more efficient. uniform.

As a preference, a humidity detection device is also installed at the second air inlet; the humidity detection device can monitor the ambient humidity in the drying room by the air humidity at the second air inlet, once the humidity is too high or When it is too small and exceeds the control range of the wind resistance net, an alarm can be issued to prompt the operator.

Therefore, the present invention has the following beneficial effects: (1) The cost of the device is lower, and the energy-saving effect is better; (2) It can accelerate the sliding of water droplets in the heat exchange plate, thereby reducing the wind resistance to the air flow, thereby reducing the energy of driving the fan (3) The ambient humidity in the drying room can be monitored.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic cross-sectional view of the heat exchange plate of the present invention.

Fig. 3 is a structural schematic diagram of the striking assembly of the present invention.

Fig. 4 is a schematic side view of the assembled heat exchange plate and striking assembly of the present invention.

Fig. 5 is a schematic structural view of the air resistance net of the present invention.

In the figure: 1. The first heat exchange plate 2, the second heat exchange plate 3, the first air inlet 4, the first air outlet 5, the second air inlet 6, the second air outlet 7, the ventilation slot 8, the first One positioning plate 9, the second positioning plate 10, mounting rod 11, impeller 12, upper mounting base 13, lower mounting base 14, left mounting base 15, right mounting base 16, upper mounting base 17, left mounting base 18, lower mounting base Seat 19, right fixed seat 20, wind resistance net 21, wind resistance rod 22, shrinkage material 23, first fan 24, second fan 25, humidity detection device.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

In the embodiment shown in Figures 1-5, a heat exchange structure for a drying room includes a mounting seat and several stacked heat exchange plates, and the heat exchange plates include first heat exchange plates 1 stacked at intervals. and the second heat exchange plate 2, the temperature of the gas passing through the first heat exchange plate is lower than the temperature of the gas passing through the second heat exchange plate, the heat exchange plate is provided with a number of penetrating through its two opposite sides The first air inlet 3, the first air outlet 4, the second air inlet 5, and the second air outlet 6 are arranged on the mounting seat, and the two ends of the air groove of the first heat exchange plate communicate with the first air inlet and the first air outlet respectively, and communicate with the second air inlet and the second air outlet at both ends of the ventilation groove of the second heat exchange plate; Two ventilation grooves 7 through its opposite two sides, the two ends of the ventilation groove of the first heat exchange plate communicate with the first air inlet and the first air outlet respectively, and the two ventilation grooves of the second heat exchange plate The ends are communicated with the second air inlet and the second air outlet respectively; the shape of the heat exchange plate is a square, and the thickness is 3-10mm. In the present embodiment, 5mm is selected, and the cross-sectional shape of the ventilation groove is a rectangle; The structure of the first heat exchange plate and the second heat exchange plate are the same, and the installation direction is different. When installing, the length direction of the ventilation groove of the first heat exchange plate is perpendicular to the length direction of the ventilation groove of the second heat exchange plate, wherein the second heat exchange plate The included angle between the ventilation groove direction of the heat exchange plate and the horizontal direction is 30°; the heat exchange assembly also includes a striking assembly located in the middle of several heat exchange plates, and the striking assembly includes two positioning plates: the first positioning plate Plate 8 and second positioning plate 9, the first positioning plate is flush with the side of the heat exchange plate facing the second air inlet, and the second positioning plate is flush with the side of the heat exchange plate facing the second air outlet There are several spaced installation rods 10 installed between the two heat exchange plates and perpendicular to the heat exchange plates, and several spaced impellers 11 are installed on the said installation rods, and the impellers are provided with Elastic blades, the rotation axis direction of the impeller is the same as the length direction of the air groove of the first heat exchange plate; the mounting base includes an upper mounting base 12, a lower mounting base 13, a left mounting base 14 and a right mounting base 15, the The first air inlet is located between the left mounting seat and the upper mounting seat, the first air outlet is located between the right mounting seat and the lower mounting seat, and the second air inlet is located between the upper mounting seat and the right mounting seat, The second air outlet is located between the left mounting seat and the lower mounting seat, and the upper mounting seat is provided with an upper fixing seat 16 for limiting the upper edge of the heat exchange plate, and the left mounting seat is provided with a For the left fixing seat 17 on the edge where the heat exchange plate is located on the left side, the lower mounting seat is provided with a lower fixing seat 18 for limiting the edge where the heat exchange plate is located on the lower side, and the right mounting seat is provided with a The right fixing seat 19 on the right edge of the limiting heat exchange plate; the second air inlet is provided with a wind resistance net 20, and the wind resistance net 20 generates greater resistance when the humidity of the air flow passing through is lower; The wind resistance net includes several wind resistance rods 21 arranged at intervals, and the wind resistance rods are provided with shrinkage material 22; the shrinkage material is cashmere or cotton thread or polyester; the first air outlet is equipped with a first fan 23, A second fan 24 is installed at the second air outlet; a humidity detection device 25 is also installed at the second air inlet, and an alarm is connected to the humidity detection device.

When using this device for tobacco leaf curing, outside air enters the heat exchange device from the first air inlet under the drive of the first fan, and enters the first air outlet through the ventilation groove of the first heat exchange plate , in the process of moving in the ventilation groove of the first heat exchange plate, because the first heat exchange plate is adjacent to the second heat exchange plate, the normal temperature gas from the outside will exchange heat with the high temperature gas from the drying room and heat up, The heated gas enters the drying room from the first air outlet; then, the hot and humid air in the drying room enters the second air inlet driven by the second fan, and then enters the second heat exchange chamber from the second air inlet. The direction of the ventilation grooves in the second heat exchange plate is perpendicular to the direction of the ventilation grooves in the first heat exchange plate, so the hot and humid air in the second heat exchange plate exchanges heat with the normal temperature air in the multiple ventilation grooves to transfer heat Give air to the first heat exchange plate.

During the heat exchange process of hot and humid air in the second heat exchange plate, due to the drop in temperature, more water vapor in the gas will be liquefied into water droplets. wind resistance, and the included angle between the direction of the ventilation groove of the second heat exchange plate and the horizontal direction in this patent is 30°, so that the water droplets can slide down quickly under the action of gravity, thereby reducing the wind resistance; and, when the gas flows from the second When an air inlet enters, part of the gas passes between the two positioning plates and drives the impeller to rotate. While the impeller rotates, its elastic blades will hit the heat exchange plates on both sides, so that the heat exchange plates will generate continuous Vibration, so as to accelerate the speed of the water droplets in the second heat exchange plate, further reduce the wind resistance, thereby reducing the energy consumption of the fan.

When the air humidity in the drying room is high, the shrinkage material on the wind resistance rod will be soaked and shrink, so that the resistance of the wind resistance net to the air flow is reduced, thereby accelerating the discharge of gas, and then making the air humidity in the drying room and when the humidity of the air in the drying room is low, the shrinkage material on the wind resistance rod will be dried and become fluffy, so that the resistance of the wind resistance net to the airflow will increase, thereby slowing down the discharge of gas, and then making the drying room The humidity of the gas in the drying room increases; when the humidity of the gas in the drying room exceeds the control range of the wind resistance net, the humidity detection device will generate a signal and trigger an alarm device to alarm.

Claims (7)

1. The utility model provides a hydrofuge heat exchange structure, characterized by, includes the heat transfer board that mount pad and a plurality of piece were piled up, the heat transfer board is including the first heat transfer board and the second heat transfer board that pile up at interval each other, the temperature that passes through in the first heat transfer board is less than the gas temperature that passes through in the second heat transfer board, be equipped with the air channel that a plurality of link up its two relative sides in the heat transfer board, be equipped with first air inlet, first gas outlet, second air inlet, second gas outlet on the mount pad, the both ends of the air channel of first heat transfer board are respectively in first air inlet and first gas outlet intercommunication, the both ends of the air channel of second heat transfer board are respectively in second air inlet and second gas outlet intercommunication, first heat transfer board is the same with the structure of second heat transfer board.

2. The dehumidifying heat exchange structure of claim 1, wherein the air vent grooves of the second heat exchange plate are formed at an angle of 15 ° to 60 ° with respect to the horizontal direction.

3. The dehumidifying heat exchange structure of claim 1 wherein the heat exchange assembly further comprises a striking assembly located between the plurality of heat exchange plates, the striking assembly being adapted to vibrate the heat exchange plates to help water droplets in the second heat exchange plates slide off.

4. The dehumidifying heat exchange structure of claim 3, wherein the striking assembly comprises a plurality of impellers, the impellers are provided with elastic blades for striking the heat exchange plates, and the rotation axis direction of the impellers is the same as the length direction of the vent grooves of the first heat exchange plate.

5. The dehumidifying heat exchange structure of claim 4 wherein said striking assembly further comprises two positioning plates: first locating plate and second locating plate, first locating plate and heat transfer board are towards one side parallel and level of second air inlet, second locating plate and heat transfer board are towards one side parallel and level of second gas outlet, install a plurality of interval setting between two heat transfer boards, and with heat transfer board vertically installation pole, install a plurality of on the installation pole the impeller.

6. The heat exchange structure for removing moisture of claim 1, wherein the length direction of the air channel of the first heat exchange plate is perpendicular to the length direction of the air channel of the second heat exchange plate.

7. The dehumidifying heat exchange structure according to any one of claims 1 to 6, wherein a humidity detecting means is further installed at the second air inlet.

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