Efficient heat recovery drying equipment

Abstract

The invention discloses efficient heat recovery drying equipment which comprises an equipment case, an exhaust fan, a heat recovery device, an outer evaporator, an inner evaporator, a condenser, an electric auxiliary heating device and related channels and valves are installed in the equipment case, and negative pressure is formed through the exhaust fan to drive airflow circulation. After air flow is pretreated through staggered air channels of the heat recovery device, moisture is removed by the outer evaporator and heated through the inner evaporator. And the condenser further cools moisture in the airflow, and finally the temperature is increased through the electric auxiliary heating device, so that the integration of dry airflow circulation and heat recovery is realized. The invention aims to provide equipment for realizing airflow circulation, heat recovery and efficient drying through cooperation of a plurality of modules. The problems that in the prior art, drying efficiency is low, equipment occupies a large area, and operation is inconvenient are solved. The air flow circulation and heat exchange mechanism in the equipment is effectively utilized, and the heat energy recovery and utilization efficiency is improved, so that the energy consumption is reduced, and the overall drying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of drying equipment, and in particular to a high-efficiency heat recovery drying equipment. Background Art

[0002] As one of the core equipment in modern industrial production, drying equipment is widely used in many industries such as food, chemical, pharmaceutical, environmental protection, and metallurgy, and undertakes the key task of removing moisture or other solvents from materials. Most of the existing drying equipment adopts the principle of hot air circulation heating. By heating the air and introducing it into the drying chamber, the moisture on the surface of the material is taken away by the airflow, thereby achieving the purpose of drying. In terms of specific structure, traditional drying equipment usually includes main components such as heating system, air circulation system, drying chamber and exhaust system. The heating system generally provides heat source by electric heating or steam heating, and heats the air so that the hot air passes through the surface of the material to evaporate the moisture; the air circulation system is responsible for guiding the hot air to the drying chamber and forming a stable airflow in the drying chamber; the exhaust system discharges moisture and excess heat to the outside. Although these equipment can meet the drying needs in industrial production to a certain extent, with the continuous expansion of production scale, the shortcomings of the equipment in terms of energy efficiency and heat recovery rate are becoming increasingly prominent.

[0003] First of all, existing drying equipment has significant energy consumption problems. Traditional drying equipment mostly relies on a single heating system to heat the air. The heated hot air passes through the surface of the material to carry away moisture, but most of the hot air is not effectively utilized. After passing through the drying chamber, the hot air will be 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 will still be discharged once it is cooled, and it cannot be effectively recovered and reused. This method makes energy use inefficient, resulting in high energy consumption during equipment operation. Especially in the case of long-term operation, the energy consumption problem of the equipment becomes more serious, increasing production costs.

[0004] Secondly, low heat recovery efficiency is another prominent problem of existing drying equipment. Although some equipment has introduced heat recovery systems, which theoretically can recover and reuse waste heat, existing heat recovery devices generally have problems such as complex structure and low recovery rate. The heat recovery system design of many equipment is not optimized enough to achieve efficient separation and recovery of humid and hot airflows, resulting in low waste heat utilization. The airflow adjustment system is also inaccurate and fails to achieve efficient separation of moisture and hot air, which greatly reduces the efficiency of waste heat recovery. In addition, the complex structure and poor operability of the heat recovery system also make the maintenance and management costs of the equipment high, reducing the overall work efficiency.

[0005] In addition, existing drying equipment has significant limitations in installation and movement. Since the equipment often generates large vibrations during operation, the equipment usually needs to be directly positioned to the use position through hoisting after arriving at the workshop, and fixed to the ground with fasteners. Although this fixing method can improve the stability of 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 does it require the removal of fasteners, but it also often requires the assistance of additional hoisting equipment to complete the position change. This operation method is not only time-consuming and labor-intensive, but also prone to equipment damage due to improper hoisting. Especially in scenarios where production line flexibility requirements are high, the disadvantages of fixed installation of existing equipment are particularly prominent.

[0006] Therefore, how to improve the energy efficiency of 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 an urgent problem to be solved in current drying equipment technology. Summary of the invention

[0007] The purpose of the present invention is to provide a drying equipment with an optimized airflow circulation path and an efficient heat recovery device, which can not only effectively reduce energy consumption, but also has flexible and maneuverable performance, and is an efficient heat recovery drying equipment that meets the needs of use in multiple scenarios.

[0008] In order to achieve the above object, the present invention adopts the following scheme: a high-efficiency heat recovery drying device, comprising: The equipment chassis has a main air inlet and an air outlet, and an air flow channel for circulation of dry air is formed inside, the main air inlet is used to introduce air flow in the drying room, and the air outlet is used to guide the air flow after drying through the air flow channel to the drying room; An exhaust fan, installed in the air outlet, used to form a negative pressure in the air flow channel to drive the circulation of the air flow; A vertical plate is vertically arranged in the equipment chassis to divide the interior of the equipment chassis into a first equipment compartment and a second equipment compartment; A heat recovery device is installed in the second equipment compartment, and is provided with horizontal air ducts and vertical air ducts arranged in a cross-like manner, one end of the horizontal air duct is connected to the main air inlet, and the other end is connected to a one-way air valve installed on the vertical plate; An external evaporator is installed in the first equipment compartment, and is provided with a compressor unit connected through a refrigerant circulation pipeline below, and is used to remove moisture from the air flow guided out by the one-way air valve; An electric air valve, arranged on a vertical plate below the one-way air valve, is used to guide the airflow after dehumidification by the external evaporator back to the bottom of the heat recovery device; An internal evaporator, which is arranged in the second equipment compartment below the heat recovery device and is connected to the compressor unit through a refrigerant circulation pipeline, and is used to heat the air flow returned through the electric air valve and send the heated air flow into the vertical air duct of the heat recovery device; A condenser installed in the second equipment compartment above the heat recovery device, for condensing moisture in the airflow directed upward in the vertical air duct; The electric auxiliary heating device is located between the condenser and the air outlet, and is used to finally heat the airflow passing through the condenser and entering the drying room; The return air component is installed on the outer wall of the second equipment compartment below the heat recovery device in an openable and closable manner, and is used to supplement the air flow into the vertical air duct.

[0009] The above scheme realizes air circulation, heat recovery and efficient drying through the synergy of multiple functional modules. An air flow channel is formed inside the equipment chassis, and the moisture in the drying room is introduced through the main air inlet. The exhaust fan forms a negative pressure at the air outlet to drive the continuous circulation of the air flow. The vertical plate structure divides the internal space into two independent compartments, which respectively accommodate devices with different functions, making the overall structure more compact and efficient. The staggered horizontal and vertical airways inside the heat recovery device optimize the transfer and reuse of heat energy; the external evaporator cooperates with the compressor unit to remove moisture from the air flow, and guides the treated air flow back to the heat recovery device through the electric air valve, thereby effectively improving the drying capacity of the circulating air flow. The internal evaporator further heats the returned air flow, sends it into the vertical airway, and the condenser condenses the moisture. Finally, the electric auxiliary heating device is used to perform the final temperature adjustment on 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 cycle. The whole set of equipment not only improves the drying efficiency but also effectively reduces energy consumption through efficient heat recovery and airflow management. It is suitable for use in efficient and energy-saving drying operations.

[0010] As a further solution of the present invention, the horizontal air duct is arranged horizontally in a zigzag shape and runs through the heat recovery device, and a continuously bent heat-conducting plate is provided inside, which significantly improves the heat exchange efficiency. This zigzag design extends the path of the airflow in the heat recovery device, increases the contact area between the airflow and the heat-conducting plate, and thus improves the adequacy of heat transfer. The continuous bending structure of the heat-conducting plate increases the guidance and uniformity of heat transfer, so that the airflow can efficiently exchange heat when passing through each bend. This design can also slow down the speed of the airflow, further enhancing the recovery effect of heat energy. In addition, the zigzag arrangement not only optimizes the space utilization inside the equipment chassis, but also reduces the eddy phenomenon in the airflow, ensuring the stability of the airflow. Overall, this improvement achieves the maximization of heat exchange efficiency through structural optimization, providing important support for the efficient energy saving of the equipment.

[0011] As a further solution of the present invention, the inner wall of the vertical air duct is a corrugated structure, which is used to increase the turbulence effect of the airflow, thereby enhancing the efficiency of heat exchange. The corrugated inner wall can guide the airflow to produce disturbances and turbulence when it passes through, so that the contact area between the airflow and the inner wall is increased, while avoiding the problem of insufficient heat exchange that may be caused by the airflow sliding along the straight wall. This turbulent effect not only increases the speed of heat transfer, but also effectively reduces cold spots and dead corners in the airflow, ensuring the uniformity and stability of the heat exchange process. In addition, while enhancing turbulence, this corrugated structure also plays a reasonable regulatory role in 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 improved, and the overall energy utilization efficiency of the equipment is optimized.

[0012] As a preferred solution of the present invention, the condenser tubes of the condenser are arranged in multiple layers in a staggered manner and are provided with heat dissipation fins to improve the condensation effect.

[0013] As a further solution of the present invention, the return air component includes: A flap opening is provided on the outer wall of the second equipment compartment below the main air inlet; A plurality of return air flaps are arranged in sequence from top to bottom in the flap opening; A cross connecting rod is connected to the side of each return air flap, used to link each return air flap to realize opening and closing, and one end is hinged on the side wall of the flap opening; The driving member is installed on the inner wall of the second equipment compartment, and the driving end is connected to the other end of the cross-linking rod to drive the cross-linking rod to change its angle, thereby linking the return air flap to flip up and open or flip down and close.

[0014] The above further solution optimizes the control ability of the equipment chassis to supplement the airflow. The return air flap, cross-link and drive components cooperate with each other to form a precise and controllable return air adjustment mechanism. This design can accurately control the circulation volume of the airflow according to the airflow demand inside the equipment chassis, avoiding the influence of excessive or insufficient airflow on the drying efficiency and heat exchange effect of the equipment, and can also effectively reduce energy waste. In addition, the linkage structure of the cross-link improves the stability and durability of the flap operation, and the drive components combined with existing sensing technology can further improve the level of automation, so that the equipment can respond quickly under different working conditions and be more adaptable.

[0015] As a preferred solution of the present invention, the driving member includes a driving gas rod installed on the inner wall of the second equipment compartment on one side of the flap opening, and the piston rod end of the driving gas rod is fixedly connected to a slider, and the slider can move up and down along a vertical guide rail arranged on the inner wall of the second equipment compartment, and the end of the cross-link away from the hinge point is rotatably plugged into the slider. This preferred solution has a specific design for the driving member, and adopts a combination of a driving gas rod and a slider to achieve a smoother and more accurate opening and closing control of the return air flap, ensuring the movement stability and positioning accuracy during the driving process, effectively avoiding the control instability problem caused by offset or shaking, and providing strong support for the efficient operation of the return air component.

[0016] As a preferred solution of the present invention, casters are provided at the four corners of the bottom of the equipment chassis, which greatly improves the mobility of the equipment chassis and enables the equipment chassis to be easily adjusted or carried between different positions, which has obvious advantages especially when frequent changes of workstations are required in industrial production.

[0017] As a further solution of the present invention, an auxiliary support foot is provided on one side of the caster so as to be liftable. The auxiliary support foot significantly enhances the stability of the equipment chassis. After the equipment chassis is moved to the target position, the operator can lower the auxiliary support foot to replace the caster's supporting function for the equipment chassis, thereby preventing the equipment chassis from being displaced due to vibration or external force during operation. In addition, the cooperation between the auxiliary support foot and the caster not only takes into account the flexibility and stability of the equipment chassis, but also effectively extends the service life of the caster, avoiding deformation or loss caused by long-term bearing of static weight. This design enables the equipment to remain stable under different ground conditions, and can achieve safe and reliable operation whether it is a flat factory floor or a slightly sloping site, providing a higher guarantee for the adaptability of the equipment.

[0018] As a preferred solution of the present invention, the auxiliary support leg comprises a vertical rod fixedly mounted on the four corner side walls at the bottom of the equipment chassis, a movable sleeve is sleeved on the vertical rod, a pedal lifting structure is provided on the movable sleeve for driving it to move up and down along the vertical rod, and a foot pad that can be flipped back and forth is hinged at the bottom end of the movable sleeve. In the design of the auxiliary support leg, the preferred solution adopts the structure of the vertical rod and the movable sleeve, so that each support point can adjust the height independently. The vertical rod is fixedly mounted on the four corner side walls at the bottom of the equipment chassis to ensure the stability and firmness of the support point, and the movable sleeve makes it easier to adjust the height through the pedal lifting structure. The design of the pedal lifting structure enables the operator to achieve the up and down movement of the movable sleeve through a simple foot-stepping action, reducing the trouble of manual adjustment and improving the operating efficiency. In addition, the foot pad hinged at the bottom end of the movable sleeve can flip back and forth, providing better ground contact performance. When the support leg is put down, the foot pad can automatically adjust the flip angle according to the ground conditions, ensuring that the equipment chassis can remain stable on any ground, and can effectively disperse the weight of the equipment chassis and reduce 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.

[0019] As a preferred solution of the present invention, the pedal lifting structure includes: A plurality of fixed teeth are arranged on an outer wall of one side of the vertical rod, and the fixed teeth are arranged at intervals along the vertical direction; The outer wall of the movable sleeve is provided with a notch through which the fixed teeth can be exposed, and an inclined driving disc is rotatably mounted at the notch; One side of the driving disc is provided with a vortex convex rib extending spirally outward from the center thereof, and the vortex convex rib is meshed with the fixed teeth; The other side of the driving disc is fixedly connected to a coaxial spur gear, and the spur gear can rotate through the central axis; A foot pedal is rotatably mounted on the central axis of the spur gear, a protruding fixing ear is radially provided at the axis of the foot pedal, a reversible clamping piece is hinged at the end of the fixing ear, and a clamping tooth meshing with the spur gear is provided at the end of the clamping piece to control the rotation of the drive disc.

[0020] The preferred solution of the above-mentioned foot pedal lifting structure is 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 at intervals on the outer wall of the vertical rod in the vertical direction, providing a precise adjustment track. A notch is provided on the movable sleeve, so that the driving disc can mesh with the fixed teeth through the notch, thereby realizing the lifting and lowering control of the movable sleeve. The vortex convex rib on the driving disc meshes with the fixed teeth, and combined with the design of the vortex, the rotational action is effectively converted into vertical movement, thereby driving the movable sleeve to slide up and down. A spur gear is connected to the other side of the driving disc, and the driving disc is controlled by rotating the central axis. The foot pedal is installed on the central axis of the spur gear, and the rotation of the driving disc is controlled by the hinged clamping piece and the clamping teeth, thereby realizing the lifting operation. The clamping piece meshes with the spur gear through the clamping teeth to ensure that the force generated by the driving disc during rotation can be accurately transmitted to the movable sleeve to drive it to move up and down. Through this structural design, the foot pedal lifting structure can efficiently and accurately adjust the height of the supporting foot and provide a good force transmission effect. The foot pedal is easy to operate and can be adjusted by stepping on it, which greatly facilitates the user to adjust the height of the equipment chassis in different environments. Overall, this design increases the convenience of use and adjustment flexibility of the equipment, and is particularly suitable for equipment that needs to be adjusted frequently.

[0021] In summary, the beneficial effects of the present invention compared to the prior art are as follows: the present invention solves the problems of low drying efficiency, large equipment footprint, inconvenient operation, etc. in the prior art through an innovative design structure. First, by providing a heat recovery device and a combined structure of an external evaporator and an internal evaporator, the present invention effectively utilizes the airflow circulation and heat exchange mechanism within the equipment to improve the recovery and utilization efficiency of thermal energy, thereby reducing energy consumption and improving the overall drying efficiency. The design of the horizontal air duct and the vertical air duct, especially the zigzag structure of the horizontal air duct, combined with the bent heat conduction plate, further improves the heat exchange efficiency; and the corrugated structure of the vertical air duct increases the turbulent effect of the airflow, further optimizing the heat exchange process.

[0022] In addition, the design of the return air component greatly enhances the airflow adjustment capability of the equipment chassis, making the airflow during the drying process more flexible and efficient. Through the linkage mechanism of the flap opening, return air flap and cross-link, the equipment chassis can achieve smooth adjustment and optimization of airflow under different working conditions, ensuring the stability and efficient operation of the equipment.

[0023] In addition, the mobility and stability of the equipment have been improved. The design of casters and auxiliary feet makes the equipment chassis easy to move and can be adjusted up and down as needed to meet the needs of different sites. At the same time, the design of the foot-operated lifting structure allows users to easily adjust the height of the equipment chassis, further improving the operability and ergonomics of the equipment.

[0024] In general, the present invention optimizes the key components of the heat recovery drying equipment, enhances the heat recovery efficiency, improves the airflow adjustment capability, improves the movement and adjustment functions of the equipment chassis, solves many deficiencies in the prior art, has good energy-saving effects and ease of use, and has significant advantages over traditional drying equipment. It is particularly suitable for drying applications that require high efficiency, flexibility and easy adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is one of the three-dimensional views of the present invention.

[0026] Figure 2 It is one of the cross-sectional views of the present invention and a schematic diagram of the airflow circulation path.

[0027] Figure 3 This is the second cross-sectional view of the present invention, a schematic diagram of the airflow entering the flow path, and an enlarged view of a local area in the figure.

[0028] Figure 4 This is the third cross-sectional view of the present invention, and a schematic diagram of the airflow outflow path.

[0029] Figure 5 for Figure 1 Magnified view at A in the middle.

[0030] Figure 6 This is the second stereoscopic view of the present invention, and an enlarged view of a local area in the figure.

[0031] Figure 7 This is the third stereoscopic view of the present invention, and an enlarged view of the auxiliary support leg in the figure.

[0032] Figure 8 This is the fourth three-dimensional view of the present invention, and the exploded schematic diagram of the auxiliary support legs in the figure.

[0033] Fig. 9 for Figure 8 Magnified view at B.

[0034] Fig.10 This is the fifth stereoscopic view of the present invention, as well as a schematic diagram of the return air flap being opened and an enlarged cross-sectional view of a local area in the figure.

[0035] Fig.11 for Fig.10 Magnified view after perspective at center C.

[0036] Fig.12 This is the fourth cross-sectional view of the present invention, and an enlarged view of a part after the return air flap is opened.

[0037] Fig.13This is the fifth cross-sectional view of the present invention, and a schematic diagram of the airflow circulation path after the return air flap is opened.

[0038] Explanation of the reference numerals: 1. Equipment chassis; 2. Exhaust fan; 3. Heat recovery device; 4. External evaporator; 5. Compressor unit; 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. Casters; 17. Auxiliary support legs; 18. Cooling fan; 31. Horizontal air duct; 32. Vertical air duct; 33. Heat conduction plate; 100. Foot pad; 101. Vertical Straight rod; 102, fixed teeth; 103, movable sleeve; 104, notch; 105, drive plate; 106, vortex rib; 107, spur gear; 108, foot pedal; 109, fixed ear; 110, snap-fit ​​piece; 111, snap teeth; 112, support 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 gas rod; 152, slider; 153, vertical guide rail. DETAILED DESCRIPTION

[0039] The following specific implementation contents provide a variety of different embodiments or examples for implementing the present invention. Of course, these are only embodiments or examples and do not wish to be restrictive. In addition, repeated reference numerals may be used in different embodiments, such as repeated numbers and / or letters. These repetitions are for the purpose of simply and clearly describing the present invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0040] In addition, spatially related words may be used, such as "below", "lower side", "from the inside out", "above", "upper side" and similar words. These relative words are for the convenience of describing the relationship between one element or feature and another element or feature in the drawings. These spatially related words include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be turned to different orientations, rotated 90 degrees or other orientations, and the spatially related adjectives used therein may also be interpreted in the same way. Therefore, it cannot be understood as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments: Figures 1 to 13The high-efficiency heat recovery drying equipment shown in the figure comprises an equipment chassis 1 having a main air inlet 12 at the rear and an air outlet 11 at the top, wherein an exhaust fan 2 is installed in the air outlet 11. After being turned on, the air flow in the drying room enters the equipment chassis 1 from the main air inlet 12, passes through the air flow channel for drying air flow inside the equipment chassis 1, and is guided back to the drying room from the air outlet 11. Specifically, a vertical plate 13 is vertically arranged in the equipment chassis 1 to separate the space in the equipment chassis 1 into a first equipment compartment 131 and a second equipment compartment 132. A heat recovery device 3 is provided in the second equipment compartment 132, located on one side of the main air inlet 12, and multiple horizontal air ducts 31 are evenly spaced horizontally inside the heat recovery device 3, whose air inlet ends are connected to the main air inlet 12. Two one-way air valves 6 are provided on the vertical plate 13 at positions corresponding to the heat recovery device 3, and the air outlet ends of the horizontal air ducts 31 face the air inlet of the one-way air valve 6. When the airflow entering the horizontal air duct 31 flows out of the horizontal air duct 31, it enters the first equipment compartment 131 through the one-way air valve 6. An external evaporator 4 is provided in the first equipment compartment 131 at a position facing the one-way air valve 6, and a compressor unit 5 connected through a refrigerant circulation pipeline is provided below the external evaporator 4, and a cooling fan 18 capable of dissipating heat for the external evaporator 4 is provided in front of the equipment chassis 1. The external evaporator 4 can preliminarily dehumidify and dry the moisture in the airflow derived from the one-way air valve 6. An electric air valve 7 is provided on the vertical plate 13 below the one-way air valve 6. After the airflow after preliminary dehumidification and drying is introduced downward into the space where the compressor unit 5 is located, it passes through the electric air valve 7 and is guided back to the second equipment compartment 132 below the heat recovery device 3. At this time, an internal evaporator 8 is provided in the second equipment compartment 132 behind the electric air valve 7, and the internal evaporator 8 is also connected to the compressor unit 5 through a refrigerant circulation pipeline. The airflow coming out of the electric air valve 7 will be preliminarily heated and dehumidified again after passing through the internal evaporator 8. A number of vertical air ducts 32 are passed through the vertical pipe in the heat recovery device 3. The airflow heated by the internal evaporator 8 will enter the air inlet end at the bottom of the vertical air duct 32 upward. After the airflow in the heat recovery device 3 is heat-exchanged with the airflow in the horizontal air duct 31, it will flow upward from the top of the vertical air duct 32. A condenser 9 is provided above the air outlet of the vertical air duct 32, and an electric auxiliary heating device 10 is provided above the condenser 9. The air inlet of the air outlet 11 is provided above the electric auxiliary heating device 10. The hot air flow flowing upward from the top of the vertical air duct 32 will first pass through the condenser 9 to condense and remove the residual moisture therein, and finally enter the air outlet 11 after the final heating by the electric auxiliary heating device 10 and be guided back to the drying room again. The entire flow path of the airflow from the main air inlet 12 to the air outlet 11 shown in the above embodiment is the air flow for the circulation of the dry airflow formed inside the equipment chassis 1 mentioned above. The moisture in the drying room is introduced through the main air inlet 12, and the exhaust fan 2 is used to form a negative pressure at the air outlet 11, which drives the continuous circulation of the airflow to form an airflow channel inside the equipment chassis 1.The airflow path is provided with a heat recovery device 3, an external evaporator 4, a compressor 5, an electric air valve 7, a one-way air valve 6 and an internal evaporator 8 to form an airflow circulation and heat exchange mechanism to effectively improve the drying capacity of the circulating airflow, and finally the electric auxiliary heating device 10 is used to perform the final temperature adjustment on the airflow entering the drying room. In order to accurately control the circulation amount of the airflow according to the airflow demand inside the equipment chassis 1 and avoid the influence of excessive or insufficient airflow on the equipment drying efficiency and heat exchange effect, an openable and closable return air component 14 is installed on the outer wall of the second equipment compartment 132 below the heat recovery device 3. The return air component 14 can flexibly supplement the fresh airflow to ensure the stability and balance of the cycle. On this basis, sensors can be set on the path through which the airflow path flows in combination with existing sensing technology. Through the industrial control host and program, the whole set of equipment has more efficient heat recovery and airflow management, which can not only improve the drying efficiency, but also effectively reduce energy consumption, and is very suitable for use in efficient and energy-saving drying operations.

[0042] Among them, Figures 2 to 4 As shown, in order to further improve the heat exchange efficiency, the horizontal air duct 31 is arranged horizontally in a zigzag shape and runs through the heat recovery device 3, and a continuously bent heat conduction plate 33 is provided inside to improve the heat exchange efficiency. The inner wall of the vertical air duct 32 is a corrugated structure, which is used to increase the turbulence effect of the airflow. The horizontal air duct 31 and the vertical air duct 32 are independently connected to each other and run through the heat recovery device 3, that is, the horizontal air duct 31 and the vertical air duct 32 are arranged in a cross-staggered manner and do not intersect with each other. Heat exchange is achieved between the horizontal air duct 31 and the vertical air duct 32 through heat conduction. In addition, the condensing tube of the condenser 9 in this embodiment is arranged in a multi-layer staggered manner and is provided with heat dissipation fins to improve the condensation effect. The condenser 9 can be set with reference to the commonly used existing technology.

[0043] In addition, if Figures 10 to 13As shown, in order to enhance the airflow adjustment capability of the equipment chassis and make the airflow during the drying process more flexible and efficient, a flap opening 140 is provided 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 sequence from top to bottom in the flap opening 140, and the side of the return air flap 141 is connected to a cross link 142, and the top of the cross link 142 is hinged on the side wall of the flap opening 140. A driving member 15 is installed on the inner wall of the second equipment compartment 132, and the driving member 15 is connected to the bottom end of the cross link 142, thereby driving the cross link 142 to change its angle, and then linking each return air flap 141 to flip up to open or flip down to close. In order to ensure that the cross-link 142 can allow the return air flap 141 to complete the upward or downward flipping action when the angle changes, a vertical guide groove 143 is provided on the side wall of the flap opening 140. Except for the top intersection axis of the cross-link 142 which is hinged on the side wall of the flap opening 140, the intersection axis of each other link connected to the return air flap 141 will be inserted into the vertical guide groove 143, and these intersection axes will move up and down along the vertical guide groove 143 to ensure that the return air flap 141 can completely cover the flap opening 140 when closed.

[0044] Among them, as a preferred embodiment of the driving member 15 in the present invention: it includes a driving gas rod 151 installed on the inner wall of the second equipment compartment 132 on one side of the flap opening 140, and the piston rod end of the driving gas rod 151 is fixedly connected with a slider 152, and the slider 152 can move up and down along a vertical guide rail 153 arranged on the inner wall of the second equipment compartment 132, and the end of the cross-link 142 away from the hinge point is rotatably plugged into the slider 152.

[0045] In addition, the mobility and stability of the drying equipment are improved to meet the needs of different sites. Figures 1 to 13As shown in , casters 16 are provided at the four corners of the bottom of the equipment chassis 1, and auxiliary support feet 17 are provided on one side of the casters 16 so as to be liftable. The auxiliary support feet 17 include vertical rods 101 respectively fixedly mounted on the four corner side walls of the bottom of the equipment chassis 1, and a movable sleeve 103 is sleeved on the vertical rod 101. The movable sleeve 103 is provided with a pedal lifting structure for driving it to move up and down along the vertical rod 101, and the bottom end of the movable sleeve 103 is hinged with a foot pad 100 that can flip back and forth. When the auxiliary support feet 17 are put down, the foot pad 100 can automatically adjust the flip angle according to the ground conditions, ensuring that the equipment chassis 1 can remain stable on any ground, and can effectively disperse the weight of the equipment chassis 1 and reduce the pressure on the ground. This design improves the stability of the equipment during use, especially in an environment with large vibrations or uneven ground, further ensuring the safety and reliability of the equipment operation. It can also effectively extend the service life of the casters and avoid deformation or loss caused by long-term bearing of static weight. It should be emphasized that the pedal lifting structure includes a plurality of fixed teeth 102 arranged on the outer wall of one side of the vertical rod 101, and these fixed teeth 102 are arranged at intervals in the vertical direction to form a rack shape. A notch 104 is provided on the outer wall of the movable sleeve 103 to expose the fixed teeth 102, and an upwardly tilted support shaft 112 is provided at the notch 104. A circular driving disk 105 is rotatably mounted on the support shaft 112, and the driving disk 105 is arranged obliquely relative to the vertical rod 101. One side of the driving disk 105 is provided with a vortex convex rib 106 extending spirally outward from its center. Since the driving disk 105 is inclined. Therefore, the vortex convex rib 106 can mesh with the fixed teeth 102 on the vertical rod 101. A spur gear 107 coaxial with the support shaft 112 is fixedly connected to the other side of the driving disk 105. One end of the support shaft 112 passes through the side of the spur gear 107, and is plugged with a foot pedal 108, which can be turned around the support shaft 112. A fixing ear 109 protruding upward is provided 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 reversible clamping member 110 is hinged at the end of the fixing ear 109, and a clamping tooth 111 that can mesh with the spur gear 107 is provided at the end of the clamping member 110. When the foot pedal 108 rotates, the clamping tooth 111 will hook the spur gear 107, so that the drive disk 105 rotates. Since only one side of the vortex rib 106 will mesh with the fixed teeth 102, when the vortex rib 106 completes the rotation, the movable sleeve 103 will move along the vertical rod 101. Thereby, the lifting and lowering operation of the auxiliary support leg 17 is realized. When the auxiliary support leg 17 needs to be raised, the clamping piece 110 is flipped to the other side, and the pedal 108 is stepped on repeatedly, and the latching tooth 111 will hook the spur gear 107 and rotate in the opposite direction, thereby driving the movable sleeve 103 to be lifted up along the vertical rod 101 and off the ground to release the movement restriction of the equipment chassis 1.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency heat recovery drying equipment, characterized in that: include: The equipment chassis (1) has a main air inlet (12) and an air outlet (11), and an air flow channel for circulation of dry air is formed inside, the main air inlet (12) is used to introduce air flow into the drying room, and the air outlet (11) is used to guide the air flow after drying through the air flow channel to the drying room; An exhaust fan (2) installed in the air outlet (11) and used to create a negative pressure in the air flow channel to drive the circulation of the air flow; A vertical plate (13) is vertically arranged in the equipment chassis (1) to divide the interior of the equipment chassis (1) into a first equipment compartment (131) and a second equipment compartment (132); a heat recovery device (3) installed in the second equipment compartment (132), wherein a horizontal air duct (31) and a vertical air duct (32) arranged in a cross-like manner are provided inside the heat recovery device (3), wherein one end of the horizontal air duct (31) is connected to the main air inlet (12), and the other end is connected to a one-way air valve (6) installed on the vertical plate (13); An external evaporator (4) is installed in the first equipment compartment (131), and is provided below with a compressor unit (5) connected via a refrigerant circulation pipeline, and is used to remove moisture from the air flow guided out by the one-way air valve (6); An electric air valve (7) is arranged on a vertical plate (13) below the one-way air valve (6) and is used to guide the airflow after dehumidification by the external evaporator (4) back to the bottom of the heat recovery device (3); an internal evaporator (8), which is disposed in a second equipment compartment (132) below the heat recovery device (3) and is connected to the compressor unit (5) via a refrigerant circulation pipeline, and is used to heat the airflow returned through the electric air valve (7) and send the heated airflow into the vertical air duct (32) of the heat recovery device (3); A condenser (9) installed in the second equipment compartment (132) above the heat recovery device (3) and used for condensing moisture in the airflow directed upward in the vertical air duct (32); An electric auxiliary heating device (10) is located between the condenser (9) and the air outlet (11) and is used to perform final heating on the airflow passing through the condenser (9) and entering the drying room; The return air component (14) is installed on the outer wall of the second equipment compartment (132) below the heat recovery device (3) in an openable and closable manner, and is used to supplement the air flow entering the vertical air duct (32).

2. The high-efficiency heat recovery drying equipment according to claim 1, characterized in that: The horizontal air channel (31) is arranged horizontally in a zigzag shape and runs through the heat recovery device (3), and a continuously bent heat conduction plate (33) is provided inside to improve heat exchange efficiency.

3. The high-efficiency heat recovery drying equipment according to claim 2 is characterized in that: The inner wall of the vertical air channel (32) is a corrugated structure, which is used to increase the turbulence effect of the airflow.

4. According to the high-efficiency heat recovery drying equipment of claim 1, the condenser tubes of the condenser (9) are arranged in multiple layers in a staggered manner and are provided with heat dissipation fins to improve the condensation effect.

5. According to the high-efficiency heat recovery drying equipment of claim 4, the return air component (14) comprises: A flap opening (140) is arranged on the outer wall of the second equipment compartment (132) below the main air inlet (12); A plurality of return air flaps (141) are sequentially arranged from top to bottom in the flap opening (140); A cross connecting rod (142) connected to the side of each return air flap (141) and used to link each return air flap (141) to achieve opening and closing, and one end of the cross connecting rod is hinged on the side wall of the flap opening (140); A driving member (15) is mounted on the inner wall of the second equipment compartment (132), with a driving end connected to the other end of the cross connecting rod (142) to drive the cross connecting rod (142) to change its angle, thereby linking the return air flap (141) to flip up and open or flip down and close.

6. The high-efficiency heat recovery drying equipment according to claim 5, characterized in that: The driving member (15) includes a driving gas rod (151) installed on the inner wall of the second equipment compartment (132) on one side of the flap opening (140); the piston rod end of the driving gas rod (151) is fixedly connected to a slider (152); the slider (152) can move up and down along a vertical guide rail (153) provided on the inner wall of the second equipment compartment (132); and the end of the cross link (142) away from the hinge point is rotatably plugged into the slider (152).

7. The high-efficiency heat recovery drying equipment according to claim 1, characterized in that: Casters (16) are provided at the four corners of the bottom of the device chassis (1) to facilitate the movement of the device chassis (1).

8. The high-efficiency heat recovery drying equipment according to claim 7, characterized in that: An auxiliary support foot (17) is provided on one side of the caster (16) so as to be liftable.

9. The high-efficiency heat recovery drying equipment according to claim 8, characterized in that: The auxiliary support foot (17) comprises vertical rods (101) respectively fixedly mounted on the four corner side walls of the bottom of the equipment chassis (1); a movable sleeve (103) is sleeved on the vertical rod (101); the movable sleeve (103) is provided with a pedal lifting structure for driving the movable sleeve (103) to move up and down along the vertical rod (101); and a foot pad (100) capable of flipping back and forth is hinged at the bottom end of the movable sleeve (103).

10. The high-efficiency heat recovery drying equipment according to claim 9, characterized in that: The pedal lifting structure comprises: A plurality of fixed teeth (102) are arranged on an outer wall of one side of the vertical rod (101), wherein the fixed teeth (102) are arranged at intervals in the vertical direction; A notch (104) capable of exposing the fixed teeth (102) is provided on the outer wall of the movable sleeve (103), and an inclined driving disc (105) is rotatably mounted at the notch (104); A vortex convex rib (106) is provided on one side of the driving disc (105) and extends spirally outward from the center thereof, and the vortex convex rib (106) meshes with the fixed teeth (102); A coaxial spur gear (107) is fixedly connected to the other side of the driving disc (105), and the spur gear (107) can rotate around the central axis; A foot pedal (108) is rotatably mounted on the central axis of the spur gear (107); a protruding fixing ear (109) is radially provided at the axis of the foot pedal (108); a reversible clamping member (110) is hingedly connected to the end of the fixing ear (109); and a clamping tooth (111) meshing with the spur gear (107) is provided at the end of the clamping member (110) to control the rotation of the driving disc (105).

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