A high efficiency heat recovery drying apparatus

Abstract

The application discloses a kind of high-efficiency heat recovery drying equipment, including equipment machine case, equipment machine case is installed with exhaust fan, heat recovery device, outer evaporator, inner evaporator, condenser, electric auxiliary heating device and relevant passageway and valve, negative pressure is formed by exhaust fan, drives air circulation.Gas flow is preprocessed after heat recovery device's staggered air duct, moisture is removed by outer evaporator, and is heated by inner evaporator.Condenser further cools the moisture in air flow, finally temperature is improved by electric auxiliary heating device, realizes drying air circulation and heat recovery integration.The purpose of the present application is to provide a kind of by multiple modules cooperation, realizes air circulation, heat recovery and high-efficiency drying equipment.Solve the problems such as low drying efficiency, equipment large footprint, inconvenient operation in prior art.Effectively utilize the air circulation and heat exchange mechanism in equipment, improve the heat recovery and utilization efficiency, thereby reduce energy consumption, improve overall drying efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drying equipment, and particularly relates to a high-efficiency heat recovery drying equipment. BACKGROUND

[0002] As one of the core equipment in modern industrial production, drying equipment is widely used in food, chemical industry, pharmaceutical, environmental protection, metallurgy and other industries, and undertakes the key task of removing water or other solvents in materials. Most of the existing drying equipment adopts the principle of hot air circulation heating, which introduces hot air into the drying chamber after heating, so that the water on the surface of the material is taken away by the airflow, thereby achieving the purpose of drying. In terms of specific structure, the traditional drying equipment usually includes heating system, airflow circulation system, drying chamber and exhaust system and other main components. The heating system generally provides heat source by electric heating or steam heating, etc., which makes hot air pass through the surface of the material to evaporate the water; the airflow circulation system is responsible for guiding the hot air to the drying chamber and forming stable airflow flow in the drying chamber; the exhaust system discharges the moisture and excessive hot air to the outside. Although these devices can meet the drying needs in industrial production to some extent, with the continuous expansion of production scale, the deficiencies of the equipment in energy efficiency, heat recovery rate and other aspects are increasingly prominent.

[0003] Firstly, the existing drying equipment has a significant energy consumption problem. The traditional drying equipment relies on a single heating system to heat the air, and the heated hot air takes away the water through the material surface, but most of the hot air cannot be effectively utilized. After passing through the drying chamber, the hot air is discharged to the outside, which not only leads to a large amount of heat energy waste, but also increases the energy consumption of the equipment. In some equipment, although there is a certain airflow circulation design, the hot air is still discharged after cooling, and cannot be effectively recovered and reused. This way makes the energy use efficiency low, resulting in high energy consumption during the operation of the equipment, especially in the case of long-term operation, the energy consumption of the equipment is more serious, increasing the production cost.

[0004] Secondly, the low heat recovery efficiency is another prominent problem of the existing drying equipment. Although some equipment has introduced a heat recovery system, which can theoretically recover and reuse waste heat, but the existing heat recovery device generally has the problems of complex structure, low recovery rate, etc. The heat recovery system of many equipment is not optimized, and cannot realize efficient separation and recovery of wet hot airflow, resulting in low utilization rate of waste heat. The airflow regulation system also has the problem of inaccuracy, which cannot realize efficient separation of wet gas and hot gas, so that the recovery efficiency of waste heat is greatly reduced. In addition, the complex structure and poor operability of the heat recovery system also increase the maintenance and management cost of the equipment, and reduce the overall work efficiency.

[0005] In addition, the existing drying equipment has significant limitations in installation and movement. Due to the large vibration generated by the equipment during operation, the equipment is usually positioned directly to the use position by hoisting after arriving at the workshop and fixed on the ground with fasteners. Although this fixing method can improve the stability of the equipment operation, it greatly limits the flexibility of the equipment. Once the production demand changes and the equipment position needs to be adjusted, the operation process becomes very cumbersome, not only the fasteners need to be removed, but often additional hoisting equipment is needed to assist in completing the position conversion. This operation method not only consumes time and effort, but also is easy to cause damage to the equipment due to improper hoisting. Especially in the scene where the production line flexibility requirement is high, the disadvantages of the existing equipment fixed installation are particularly prominent.

[0006] Therefore, how to improve the energy efficiency of the existing drying equipment, reduce energy consumption, improve heat recovery efficiency, and at the same time enhance the flexibility of the equipment to facilitate position adjustment, has become a problem that needs to be solved in the current drying equipment technology. SUMMARY

[0007] The purpose of the present application is to provide a drying equipment with optimized air flow circulation path and high-efficiency heat recovery device, which not only can effectively reduce energy consumption, but also has flexible performance, meeting the use requirements of high-efficiency heat recovery drying equipment in multiple scenes.

[0008] In order to achieve the above purpose, the present application adopts the following scheme: a high-efficiency heat recovery drying equipment, comprising:

[0009] The equipment cabinet has a main air inlet and an air outlet, and an air flow channel for drying air flow circulation is formed inside. The main air inlet is used to introduce the air flow in the drying room, and the air outlet is used to guide the air flow dried through the air flow channel into the drying room.

[0010] The air extractor is installed in the air outlet and is used to form a negative pressure in the air flow channel to drive the circulation of the air flow.

[0011] The vertical plate is vertically arranged in the equipment cabinet and separates the equipment cabinet into a first equipment cabin and a second equipment cabin.

[0012] The heat recovery device is installed in the second equipment cabin, and the inside is provided with horizontal air ducts and vertical air ducts which are crosswise staggered. One end of the horizontal air duct is in communication with the main air inlet, and the other end is in communication with the one-way air valve installed on the vertical plate.

[0013] The outer evaporator is installed in the first equipment cabin and is provided below with a compressor unit connected through a refrigerant circulation pipeline for removing moisture in the air flow guided by the one-way air valve.

[0014] An electrically powered air valve is arranged on the vertical plate below the one-way air valve, and is used to guide the air flow after dehumidification by the external evaporator back to the heat recovery device;

[0015] An internal evaporator is arranged in the second equipment chamber below the heat recovery device, and is connected to the compressor set through a refrigerant circulation pipeline, and is used to heat the air flow returned by the electrically powered air valve, and to send the heated air flow into the vertical air duct of the heat recovery device;

[0016] A condenser is installed in the second equipment chamber above the heat recovery device, and is used to condense the moisture in the air flow directed upward in the vertical air duct;

[0017] An electrically powered auxiliary heating device is located between the condenser and the air outlet, and is used to finally heat the air flow entering the drying room after passing through the condenser;

[0018] A return air component is installed on the outer wall of the second equipment chamber below the heat recovery device in an openable and closable manner, and is used to supplement the air flow into the vertical air duct.

[0019] The above scheme realizes air flow circulation, heat recovery and efficient drying through the synergistic effect of multiple functional modules. The equipment cabinet forms an air flow channel inside, and the main air inlet is used to introduce the moisture in the drying room. A negative pressure is formed at the air outlet by the air extractor, which drives the continuous circulation of the air flow. The vertical plate structure separates the internal space into two independent chambers, which accommodate different functional devices, making the overall structure more compact and efficient. The staggered horizontal and vertical air ducts inside the heat recovery device optimize the transfer and reuse of heat energy. The external evaporator cooperates with the compressor set to remove moisture from the air flow, and the electrically powered air valve guides the processed air flow back to the heat recovery device, thereby effectively improving the drying capacity of the circulating air flow. The internal evaporator further heats the returned air flow, which is sent to the vertical air duct, and the condenser condenses the moisture. Finally, the electrically powered auxiliary heating device is used to finally adjust the temperature of the air flow entering the drying room. The return air component flexibly supplements the fresh air flow to ensure the stability and balance of the circulation. The whole set of equipment realizes efficient heat energy recovery and air flow management, which not only improves the drying efficiency, but also effectively reduces the energy consumption, and is suitable for application in efficient and energy-saving drying operations.

[0020] As a further improvement of the present application, the horizontal air duct is arranged in a zigzag shape through the heat recovery device, with a continuously bent heat-conducting plate inside, significantly improving the heat exchange efficiency. This zigzag design prolongs the path of the airflow in the heat recovery device, increasing the contact area between the airflow and the heat-conducting plate, thereby improving the sufficiency of heat transfer. The continuously bent structure of the heat-conducting plate increases the directionality and uniformity of heat transfer, allowing efficient heat exchange to occur as the airflow passes through each bend. This design also slows down the airflow, further enhancing the heat recovery effect. In addition, the zigzag arrangement optimizes the space utilization within the equipment cabinet and reduces the vortex phenomenon in the airflow, ensuring the stability of the airflow. Overall, this improvement maximizes heat exchange efficiency through structural optimization, providing important support for the energy efficiency of the equipment.

[0021] As a further improvement of the present application, the inner wall of the vertical air duct is in a corrugated structure to increase the turbulence effect of the airflow, thereby enhancing the efficiency of heat exchange. The corrugated inner wall can guide the airflow to generate disturbances and turbulence as it passes through, increasing the contact area between the airflow and the inner wall, while avoiding the problem of insufficient heat exchange that may occur when the airflow slides along a straight wall. This turbulence effect not only increases the speed of heat transfer but also effectively reduces cold spots and dead angles in the airflow, ensuring the uniformity and stability of the heat exchange process. In addition, this corrugated structure not only enhances turbulence but also reasonably regulates the speed and direction of the airflow, making the heat recovery process in the vertical air duct more efficient. Through this improvement, the performance of the heat recovery device is further enhanced, optimizing the overall energy utilization efficiency of the equipment.

[0022] As a preferred embodiment of the present application, the condenser's condensing pipe is arranged in multiple layers in an interlaced manner and is provided with heat dissipation fins to improve the condensing effect.

[0023] As a further improvement of the present application, the return air component includes:

[0024] A flap opening is provided on the outer wall of the second equipment compartment below the main air inlet;

[0025] A plurality of return air flaps are arranged in the flap opening from top to bottom;

[0026] Cross-link rods are connected to the sides of each return air flap for linkage to open and close the return air flaps, with one end hinged to the side wall of the flap opening;

[0027] A drive member is installed on the inner wall of the second equipment compartment, with the drive end connected to the other end of the cross-link rods, causing the cross-link rods to change angles and thereby link the return air flaps to open upward or close downward.

[0028] The further local scheme optimizes the control ability of the equipment cabinet to air flow supplement. The return air flap, the cross link and the driving member cooperate with each other to form a precisely controllable return air adjusting mechanism. The design can accurately control the circulation amount of air flow according to the air flow demand inside the equipment cabinet, avoid the influence of excessive or insufficient air flow on the drying efficiency and heat exchange effect of the equipment, and effectively reduce energy waste. In addition, the linkage structure of the cross link improves the stability and durability of the flap operation, and the driving member combined with the existing sensing technology can further improve the automation level, so that the equipment can quickly respond under different working conditions and has stronger adaptability.

[0029] As a preferred local scheme of the present application, the driving member comprises a driving air rod installed on the inner wall of the second equipment cabin on one side of the flap opening, and the piston rod end of the driving air rod is fixedly connected with a sliding block. The sliding block can move up and down along the vertical guide rail arranged on the inner wall of the second equipment cabin. The end of the cross link away from the hinge point is rotatably inserted with the sliding block. The preferred scheme specifically designs the driving member, adopts the combination of the driving air rod and the sliding block, realizes more stable and accurate opening and closing control of the return air flap, ensures the motion stability and positioning accuracy during driving, effectively avoids the control instability problem caused by deviation or shaking, and provides strong support for efficient operation of the return air component.

[0030] As a preferred local scheme of the present application, casters are arranged at the four corners of the bottom of the equipment cabinet, which greatly improves the mobility of the equipment cabinet, so that the equipment cabinet can be easily adjusted or carried between different positions, especially when the work position needs to be frequently changed in industrial production.

[0031] As a further local scheme of the present application, an auxiliary supporting leg is arranged on one side of the caster in a lifting manner. The auxiliary supporting leg significantly enhances the stability of the equipment cabinet. After the equipment cabinet is moved to the target position, the operator can lower the auxiliary supporting leg to replace the support of the equipment cabinet by the caster, so as to avoid displacement of the equipment cabinet during operation due to vibration or external force. In addition, the cooperation of the auxiliary supporting leg and the caster not only takes into account the flexibility and stability of the equipment cabinet, but also effectively prolongs the service life of the caster, avoiding deformation or wear caused by long-term bearing of static weight. This design enables the equipment to remain stable under different ground conditions, whether it is a flat factory floor or a slightly sloping site, and safe and reliable operation can be realized, providing higher protection for the adaptability of the equipment.

[0032] As a preferred form of the present application, the auxiliary support foot comprises a vertical rod fixedly installed on the four corner side walls of the bottom of the equipment cabinet, a movable sleeve is sleeved on the vertical rod, a foot pedal lifting structure is arranged on the movable sleeve for driving the movable sleeve to move up and down along the vertical rod, and a foot pad capable of turning back and forth is hinged to the bottom end of the movable sleeve. In the design of the auxiliary support foot, the vertical rod and the movable sleeve are adopted, so that the height of each support point can be independently adjusted. The vertical rod is fixedly installed on the four corner side walls of the bottom of the equipment cabinet, which ensures the stability and firmness of the support point, and the movable sleeve makes the height adjustment more convenient through the foot pedal lifting structure. The design of the foot pedal lifting structure enables the operator to realize the up and down movement of the movable sleeve through a simple foot pedal action, which reduces the trouble of manual adjustment and improves the operation efficiency. In addition, the foot pad hinged to the bottom end of the movable sleeve can turn back and forth, which provides better ground contact performance. When the support foot is put down, the foot pad can automatically adjust the turning angle according to the ground condition, which ensures that the equipment cabinet can maintain stability on any ground and effectively disperses the weight of the equipment cabinet, reducing the pressure on the ground. This design improves the stability of the equipment during use, especially in environments with large vibrations or uneven ground, further ensuring the safety and reliability of the equipment operation.

[0033] As a preferred form of the present application, the foot pedal lifting structure comprises:

[0034] A plurality of fixed teeth are arranged on the outer wall of one side of the vertical rod, and the fixed teeth are arranged in a vertical direction;

[0035] A notch is arranged on the outer wall of the movable sleeve, and the notch is capable of exposing the fixed teeth;

[0036] A spiral convex rib is arranged on one side of the driving disc, and the spiral convex rib extends outward from the center of the driving disc;

[0037] A spur gear coaxial with the driving disc is fixedly connected to the other side of the driving disc, and the spur gear is capable of rotating through the central shaft;

[0038] A pedal plate is rotatably installed on the central shaft of the spur gear, and a fixed lug is radially arranged on the shaft position of the pedal plate;

[0039] The preferred embodiment of the foot pedal lifting structure aims to achieve the up and down adjustment of the movable sleeve on the vertical rod through a sophisticated mechanical structure. The fixed teeth are arranged on the outer wall of the vertical rod in a vertical direction, providing an accurate adjustment track. The movable sleeve is provided with a notch, allowing the driving disc to engage with the fixed teeth through the notch, thereby achieving the lifting control of the movable sleeve. The driving disc is engaged with the fixed teeth through the spiral protrusions, which effectively convert the rotary motion into vertical movement in combination with the spiral design, thereby driving the movable sleeve to slide up and down. The other side of the driving disc is connected to the spur gear, which is controlled by the central shaft to rotate the driving disc. The foot pedal is installed on the central shaft of the spur gear, and the rotation of the driving disc is controlled by the hinged clamping piece and the clamping tooth, thereby achieving the lifting operation. The clamping piece is engaged with the spur gear through the clamping tooth, ensuring that the force generated by the driving disc during rotation can be accurately transmitted to the movable sleeve to drive its up and down movement. Through this structural design, the foot pedal lifting structure can efficiently and accurately adjust the height of the supporting foot, and provides good force transmission effect. The foot pedal is easy to operate, and the lifting adjustment can be completed by stepping on it, greatly facilitating the user to adjust the height of the equipment case in different environments. Overall, this design increases the convenience and flexibility of the equipment, and is particularly suitable for equipment that needs to be adjusted frequently.

[0040] In summary, the present application has the following advantages over the prior art: through the innovative design structure, the problems of low drying efficiency, large equipment footprint, inconvenient operation and the like in the prior art are solved. First, by setting the combination structure of the heat recovery device and the outer evaporator and the inner evaporator, the present application effectively utilizes the airflow circulation and heat exchange mechanism in the equipment, improves the heat recovery and utilization efficiency, thereby reducing the energy consumption and improving the overall drying efficiency. The design of horizontal air duct and vertical air duct, especially the zigzag structure of horizontal air duct, cooperates with the bending heat conducting plate, so that the heat exchange efficiency is further improved; and the corrugated structure of the vertical air duct increases the turbulent effect of the airflow, further optimizing the heat exchange process.

[0041] In addition, the design of the air return component greatly enhances the airflow regulation capability of the equipment case, making the airflow flow more flexible and efficient during the drying process. Through the linkage mechanism of the flap opening, the air return flap and the cross link, the equipment case can realize smooth adjustment and optimization of airflow under different working conditions, ensuring the stability and efficient operation of the equipment.

[0042] In addition, the mobility and stability of the equipment have been improved, and the design of the casters and auxiliary supporting feet makes the equipment case easy to move and can be adjusted in height as needed, adapting to the use requirements of different sites. At the same time, the design of the foot pedal lifting structure allows users to conveniently adjust the height of the equipment case, further improving the operability and human engineering experience of the equipment.

[0043] Overall, the present application optimizes the key components of the heat recovery drying equipment, enhances the heat energy recovery efficiency, improves the airflow adjustment capacity, improves the movement and adjustment function of the equipment case, solves many deficiencies in the prior art, has good energy saving effect and use convenience, has significant advantages compared with the traditional drying equipment, and is especially suitable for drying applications that require high efficiency, flexibility and easy adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is one of the perspective views of the present application.

[0045] Figure 2 It is one of the cross-sectional views of the present application, and the schematic of the air flow circulation path.

[0046] Figure 3 It is the second cross-sectional view of the present application, and the schematic of the air flow entering flow path and the enlarged view of the local area in the figure.

[0047] Figure 4 It is the third cross-sectional view of the present application, and the schematic of the air flow outflow path.

[0048] Figure 5 It is Figure 1 the enlarged view at A in the figure.

[0049] Figure 6 It is the second perspective view of the present application, and the enlarged view of the local area in the figure.

[0050] Figure 7 It is the third perspective view of the present application, and the enlarged view of the exploded auxiliary support foot in the figure.

[0051] Figure 8 It is the fourth perspective view of the present application, and the exploded schematic view of the auxiliary support foot in the figure.

[0052] Figure 9 It is Figure 8 the enlarged view at B in the figure.

[0053] Figure 10 It is the fifth perspective view of the present application, and the schematic of the return air flap opening and the cross-sectional enlarged view of the local area in the figure.

[0054] Figure 11 It is Figure 10 the enlarged view after the perspective at C.

[0055] Figure 12 It is the fourth cross-sectional view of the present application, and the enlarged view of the local area after the return air flap opening in the figure.

[0056] Figure 13Figure 5 is a cross-sectional view of the present application, and a schematic of the air flow circulation path after the return air flap is opened.

[0057] The reference signs are explained as follows: 1, equipment cabinet; 2, air extractor; 3, heat recovery device; 4, external evaporator; 5, compressor set; 6, one-way air valve; 7, electric air valve; 8, internal evaporator; 9, condenser; 10, auxiliary heating device; 11, air outlet; 12, main air inlet; 13, vertical plate; 14, return air component; 15, driving member; 16, caster; 17, auxiliary supporting leg; 18, heat dissipation fan; 31, horizontal air duct; 32, vertical air duct; 33, heat conducting plate; 100, foot pad; 101, vertical rod; 102, fixed tooth; 103, movable sleeve; 104, notch; 105, driving disc; 106, spiral convex rib; 107, straight gear; 108, foot pedal; 109, fixed lug; 110, clamping member; 111, clamping tooth; 112, supporting shaft; 131, first equipment compartment; 132, second equipment compartment; 140, flap opening; 141, return air flap; 142, cross connecting rod; 143, vertical guide groove; 151, driving air rod; 152, sliding block; 153, vertical guide rail. DETAILED DESCRIPTION

[0058] The following detailed description provides for a variety of different embodiments or examples for implementing the present application. Of course, these are merely examples and are not intended to be limiting. Additionally, like reference numerals can be used to denote like elements throughout the various figures and descriptions. These repetitions are made for simplicity of description and are not necessarily intended to indicate a particular relationship between the different embodiments and / or structures being discussed.

[0059] Furthermore, where spatially relative terms are used, such as "beneath", "below", "lower", "above", "upper", and the like, they are used for ease of describing the aspects of the application only and to clarify the images only. These spatially relative terms are not to be construed as limiting the application to a particular orientation of the device or element described therein. The device can be rotated 90 degrees or other orientation in use and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", etc., are used herein only to describe one element from another, and are not to be construed as indicating any relative importance or any characteristic of the elements described. Thus, a feature described as "first" can implicitly or explicitly include one or more of the features described as "second" or "third". The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise.

[0060] The application will be further described with reference to the drawings and specific examples in which: Figures 1 to 13The high-efficiency heat recovery drying equipment includes a device cabinet 1 with a main air inlet 12 at the tail and an air outlet 11 at the top. An air extractor 2 is installed in the air outlet 11. When the air extractor 2 is turned on, the airflow in the drying room enters the device cabinet 1 through the main air inlet 12, passes through the airflow channel inside the device cabinet 1 for drying the airflow, and is then guided back into the drying room from the air outlet 11. Specifically, a vertical plate 13 is vertically arranged in the device cabinet 1 to divide the space in the device cabinet 1 into a first device compartment 131 and a second device compartment 132. A heat recovery device 3 is arranged in the second device compartment 132 on the side of the main air inlet 12. The heat recovery device 3 is internally and uniformly spaced with multiple horizontal air passages 31, the air inlets of which are communicated with the main air inlet 12. Two one-way air valves 6 are arranged on the vertical plate 13 corresponding to the position of the heat recovery device 3. The air outlets of the horizontal air passages 31 are opposite the air inlets of the one-way air valves 6. When the airflow entering the horizontal air passages 31 flows out of the horizontal air passages 31, it passes through the one-way air valves 6 and enters the first device compartment 131. An external evaporator 4 is arranged in the first device compartment 131 opposite the position of the one-way air valves 6. A compressor set 5 connected by a refrigerant circulation pipeline is arranged below the external evaporator 4. A heat dissipation fan 18 is arranged on the front of the device cabinet 1 to dissipate heat for the external evaporator 4. The external evaporator 4 can preliminarily dehumidify and dry the airflow guided by the one-way air valves 6. An electric air valve 7 is arranged on the vertical plate 13 below the one-way air valves 6. When the preliminarily dehumidified and dried airflow is guided downward into the space where the compressor set 5 is arranged, it passes through the electric air valve 7 and is guided back into the second device compartment 132 below the heat recovery device 3. At this time, an internal evaporator 8 is arranged in the second device compartment 132 behind the electric air valve 7, which is also connected with the compressor set 5 by a refrigerant circulation pipeline. The airflow from the electric air valve 7 is preliminarily heated and dehumidified after passing through the internal evaporator 8. A plurality of vertical air passages 32 are vertically arranged in the heat recovery device 3. The heated airflow from the internal evaporator 8 enters the air inlets at the bottom of the vertical air passages 32. After heat exchange with the airflow in the horizontal air passages 31, the airflow flows out from the top of the vertical air passages 32. A condenser 9 is arranged above the vertical air passages 32. An electric auxiliary heating device 10 is arranged above the condenser 9. The air inlet of the air outlet 11 is arranged above the electric auxiliary heating device 10. The hot airflow flowing out from the top of the vertical air passages 32 is first cooled and dehumidified by the condenser 9, and then finally heated by the electric auxiliary heating device 10 before entering the air outlet 11 and being guided back into the drying room. The entire flow path of the airflow from the main air inlet 12 to the air outlet 11 is the airflow channel formed inside the device cabinet 1 for drying the airflow circulation. The humidity in the drying room is introduced through the main air inlet 12. The negative pressure is formed at the air outlet 11 by the air extractor 2 to drive the continuous circulation of the airflow and form the airflow channel inside the device cabinet 1.The path of the air flow channel passes through the heat recovery device 3, the outer evaporator 4, the compressor 5, the electric air valve 7, the one-way air valve 6, and the inner evaporator 8, thereby forming an air flow circulation and heat exchange mechanism to effectively improve the drying capacity of the circulating air flow. Finally, the electric auxiliary heating device 10 is used to adjust the temperature of the air flow entering the drying room. In order to accurately control the circulation amount of the air flow according to the air flow demand inside the equipment cabinet 1, and avoid the influence of excessive or insufficient air flow on the drying efficiency and heat exchange effect of the equipment, a closable air return component 14 is installed on the outer wall of the second equipment compartment 132 below the heat recovery device 3. The air return component 14 can flexibly supplement fresh air flow to ensure the stability and balance of the circulation. On this basis, sensors can be installed on the path of the air flow channel in combination with existing sensing technology. Through the industrial control host and program, the entire set of equipment has higher heat energy recovery and air flow management, which not only improves the drying efficiency, but also effectively reduces energy consumption, and is very suitable for application in high-efficiency and energy-saving drying operations.

[0061] As shown in Figures 2 to 4 In order to further improve the heat exchange efficiency, the horizontal air duct 31 is arranged in a zigzag shape and penetrates through the heat recovery device 3, and a continuous bending heat conducting plate 33 is arranged inside to improve the heat exchange efficiency. The inner wall of the vertical air duct 32 is in a corrugated structure to increase the turbulent effect of the air flow. The horizontal air duct 31 and the vertical air duct 32 independently penetrate through the heat recovery device 3, that is, the horizontal air duct 31 and the vertical air duct 32 are arranged in a cross shape and do not intersect, and heat exchange is achieved between the horizontal air duct 31 and the vertical air duct 32 through heat conduction. In addition, the condenser 9 in the embodiment adopts a multi-layer staggered arrangement, and is provided with heat dissipation fins to improve the condensation effect. The condenser 9 can be set according to the commonly used existing technology.

[0062] In addition, as shown in Figures 10 to 13As shown, in order to enhance the air flow regulation ability of the equipment cabinet, so that the air flow in the drying process is more flexible and efficient, a flap opening 140 is arranged on the outer wall of the second equipment compartment 132 below the main air inlet 12. The return air component 14 includes a plurality of return air flaps 141 arranged in the flap opening 140 from top to bottom, and the return air flaps 141 are connected with cross connecting rods 142, the top ends of the cross connecting rods 142 are hinged on the side wall of the flap opening 140, and a driving member 15 is installed on the inner wall of the second equipment compartment 132, and the bottom end of the driving member 15 is connected with the cross connecting rods 142, so as to drive the cross connecting rods 142 to change the angle, and in turn drive each return air flap 141 to open upward or close downward. In order to ensure that the cross connecting rods 142 can change the angle and make the return air flaps 141 complete the upward or downward action, a vertical guide groove 143 is arranged on the side wall of the flap opening 140, and the cross connecting rods 142 are hinged on the side wall of the flap opening 140 except the uppermost one, and the intersection axes of the remaining connecting rods connected with the return air flaps 141 are inserted into the vertical guide groove 143, and the intersection axes move up and down along the vertical guide groove 143, so as to ensure that the return air flaps 141 can completely cover the flap opening 140 when closed.

[0063] Among them, as a preferred embodiment of the driving member 15 in the present application: including a driving air rod 151 installed on one side of the second equipment compartment 132 inner wall of the flap opening 140, the piston rod end of the driving air rod 151 is fixedly connected with a sliding block 152, the sliding block 152 can move up and down along the vertical guide rail 153 arranged on the inner wall of the second equipment compartment 132, and the end away from the hinge point of the cross connecting rod 142 is rotatably inserted with the sliding block 152.

[0064] In addition, in order to improve the mobility and stability of the drying equipment, to adapt to the use requirements of different sites. For example Figures 1 to 13As shown in the middle, the equipment cabinet 1 is provided with wheels 16 at the four corners of the bottom, and an auxiliary support leg 17 is provided on one side of the wheel 16 and can be lifted. The auxiliary support leg 17 includes a vertical rod 101 fixedly installed on the bottom of the equipment cabinet 1 at four corners, a movable sleeve 103 is sleeved on the vertical rod 101, a foot pedal lifting structure is arranged on the movable sleeve 103 for driving the movable sleeve 103 to move up and down along the vertical rod 101, and a foot pad 100 capable of being flipped back and forth is hinged to the bottom end of the movable sleeve 103. When the auxiliary support leg 17 is lowered, the foot pad 100 can automatically adjust the flip angle according to the ground condition, so that the equipment cabinet 1 can be kept stable on any ground, the weight of the equipment cabinet 1 can be effectively dispersed, and the pressure on the ground can be reduced. This design improves the stability of the equipment during use, especially in an environment with large vibration or uneven ground, further ensures the safety and reliability of the equipment operation, effectively prolongs the service life of the wheels, and avoids deformation or wear caused by long-term bearing of static weight. It needs to be emphasized that the foot pedal lifting structure includes a plurality of fixed teeth 102 arranged on one side of the outer wall of the vertical rod 101 and spaced apart in the vertical direction to form a rack shape. The outer side wall of the movable sleeve 103 is provided with a gap 104 capable of exposing the fixed teeth 102, and a support shaft 112 is arranged at the gap 104 and upwardly inclined. A circular driving disc 105 is rotatably installed on the support shaft 112, the driving disc 105 is inclined relative to the vertical rod 101, one side of the driving disc 105 is provided with a spiral convex rib 106 extending outward from the center, and the driving disc 105 is inclined. Therefore, the spiral convex rib 106 can engage with the fixed teeth 102 on the vertical rod 101. The other side of the driving disc 105 is fixedly connected with a spur gear 107 coaxial with the support shaft 112. One end of the support shaft 112 penetrates through the side of the spur gear 107, and a foot pedal 108 is inserted into the support shaft 112. The foot pedal 108 can be flipped about the support shaft 112. An upwardly protruding fixing ear 109 is arranged at the position where the foot pedal 108 is sleeved on the support shaft 112. The extension direction of the protruding fixing ear 109 is the same as the radial outward radiation direction along the support shaft 112. A clamping piece 110 capable of being flipped back and forth is hinged to the end of the fixing ear 109, and a clamping tooth 111 capable of engaging with the spur gear 107 is arranged at the end of the clamping piece 110. When the foot pedal 108 rotates, the clamping tooth 111 will hook the spur gear 107 to make the driving disc 105 rotate. Since the spiral convex rib 106 only has one side engaging with the fixed teeth 102, when the spiral convex rib 106 completes the rotation, the movable sleeve 103 will move along the vertical rod 101. Thus, the lifting operation of the auxiliary support leg 17 is realized. When the auxiliary support leg 17 needs to be lifted, the clamping piece 110 is flipped to the other side, the foot pedal 108 is repeatedly stepped, the clamping tooth 111 hooks the spur gear 107 to rotate in the reverse direction, and the movable sleeve 103 can be lifted upwards along the vertical rod 101 to be separated from the ground to release the movement restriction of the equipment cabinet 1.

[0065] The essential principles and main features of the present application and the advantages thereof have been shown and described above, it should be understood by those skilled in the art that the present application is not limited by the above-described embodiments, the above-described embodiments and descriptions in the specification are only to illustrate the principles of the present application, various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heat recovery drying apparatus, characterized by, The utility model relates to a drying equipment cabinet, which comprises the following parts: a device cabinet (1) having a main air inlet (12) and an air outlet (11), an air flow channel for circulating dry air flow being formed inside the device cabinet (1), the main air inlet (12) being used to introduce air flow into a drying room, and the air outlet (11) being used to guide the air flow dried by the air flow channel to the drying room; an air extractor (2) installed in the air outlet (11) and used to form negative pressure in the air flow channel to drive the circulation of the air flow; a vertical plate (13) vertically arranged in the device cabinet (1) and used to divide the device cabinet (1) into a first device compartment (131) and a second device compartment (132); a heat recovery device (3) installed in the second device compartment (132) and having horizontal air passages (31) and vertical air passages (32) arranged in a cross pattern inside the heat recovery device (3), one end of the horizontal air passages (31) being communicated with the main air inlet (12), and the other end being communicated with a one-way air valve (6) installed on the vertical plate (13); an external evaporator (4) installed in the first device compartment (131) and having a compressor set (5) connected by a refrigerant circulation pipeline arranged below the external evaporator (4) and used to remove moisture in the air flow guided by the one-way air valve (6); an electric air valve (7) arranged on the vertical plate (13) below the one-way air valve (6) and used to guide the air flow dried by the external evaporator (4) back to below the heat recovery device (3); an internal evaporator (8) arranged in the second device compartment (132) below the heat recovery device (3) and connected with the compressor set (5) by a refrigerant circulation pipeline and used to heat the air flow returned by the electric air valve (7) and send the heated air flow into the vertical air passages (32) of the heat recovery device (3); a condenser (9) installed in the second device compartment (132) above the heat recovery device (3) and used to condense moisture in the air flow guided upward in the vertical air passages (32); an electric auxiliary heating device (10) arranged between the condenser (9) and the air outlet (11) and used to finally heat the air flow entering the drying room after passing through the condenser (9); a return air component (14) installed on the outer wall of the second device compartment (132) below the heat recovery device (3) in an openable and closable manner and used to supplement the air flow into the vertical air passages (32); the horizontal air passages (31) are arranged in a zigzag shape and penetrate through the heat recovery device (3), and the inside of the horizontal air passages (31) is provided with heat-conducting plates (33) bent continuously to improve the heat exchange efficiency; the inner wall of the vertical air passages (32) is in a corrugated structure to increase the turbulent effect of the air flow; four casters (16) are arranged at the four corners of the bottom of the device cabinet (1) to facilitate the movement of the device cabinet (1); an auxiliary supporting leg (17) is arranged on one side of the casters (16) in a liftable manner. The auxiliary supporting legs (17) comprise vertical rods (101) fixedly installed on the bottom four corner side walls of the equipment cabinet (1) respectively, an active sleeve (103) is sleeved on the vertical rod (101), a foot pedal lifting structure for driving the active sleeve (103) to move up and down along the vertical rod (101) is arranged on the active sleeve (103), and a foot pad (100) capable of turning back and forth is hinged to the bottom end of the active sleeve (103); The foot pedal lifting structure comprises: A plurality of fixed teeth (102) arranged on the outer wall of one side of the vertical rod (101) are arranged at intervals in the vertical direction; A notch (104) capable of exposing the fixed teeth (102) is arranged on the outer side wall of the active sleeve (103), and an inclined driving disc (105) is rotatably installed at the notch (104); A spiral convex rib (106) extending outward from the center of the driving disc (105) is arranged on one side of the driving disc (105), and the spiral convex rib (106) is engaged with the fixed teeth (102); A straight gear (107) coaxial with the driving disc (105) is fixedly connected to the other side of the driving disc (105), and the straight gear (107) can rotate through the central shaft; A foot pedal (108) is rotatably installed on the central shaft of the straight gear (107), a fixed lug (109) protruding radially is arranged at the shaft position of the foot pedal (108), a reversible clamping piece (110) is hinged to the end of the fixed lug (109), and a clamping tooth (111) engaged with the straight gear (107) is arranged at the end of the clamping piece (110) to control the rotation of the driving disc (105).

2. The high-efficiency heat recovery drying device according to claim 1, wherein the condensing pipe of the condenser (9) is arranged in multiple layers in a staggered manner and is provided with heat dissipation fins to improve the condensing effect.

3. The high-efficiency heat recovery drying device according to claim 2, wherein the return air component (14) comprises: A flap opening (140) arranged on the outer wall of the second equipment cabin (132) below the main air inlet (12); A plurality of return air flaps (141) arranged in the flap opening (140) from top to bottom; Cross connecting rods (142) connected to the side surfaces of the return air flaps (141) and used for linking the return air flaps (141) to open and close, one end of each cross connecting rod (142) being hinged to the side wall of the flap opening (140); A driving member (15) installed on the inner wall of the second equipment cabin (132), the driving end of the driving member (15) being connected to the other ends of the cross connecting rods (142) to drive the cross connecting rods (142) to change the angle and thereby link the return air flaps (141) to turn up and open or turn down and close.

4. A high efficiency heat recovery drying apparatus according to claim 3, wherein The driving member (15) comprises a driving air rod (151) installed on the inner wall of the second equipment cabin (132) on one side of the flap opening (140), the piston rod end of the driving air rod (151) is fixedly connected with a sliding block (152), the sliding block (152) can move up and down along the vertical guide rail (153) arranged on the inner wall of the second equipment cabin (132), and the end, away from the hinge joint, of the cross link (142) is rotationally inserted with the sliding block (152).

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