Efficient heat recovery drying room with external drying main machine

Abstract

The utility model discloses an efficient heat recovery drying room with an external drying main machine, which comprises a drying room and 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 arranged 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 utility model aims to provide a high-efficiency drying room capable of realizing airflow circulation and heat recovery 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. And airflow circulation and a heat exchange mechanism in the equipment are effectively utilized, so that the energy consumption is reduced, and the recovery and utilization efficiency of heat energy is improved.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment, and in particular to a high-efficiency heat recovery drying chamber with an external drying host. Background Technology

[0002] Drying, as an important industrial process, is widely used in various industries such as food, chemical, pharmaceutical, environmental protection, and metallurgy. Its core objective is to improve product stability, extend shelf life, optimize physical properties, and meet specific process requirements by removing moisture or other solvents from materials. In this process, drying equipment serves as a key technological support, and its performance and efficiency directly affect product quality, production costs, and energy consumption.

[0003] Currently, the market offers a wide variety of drying equipment, covering various drying methods such as convection drying, contact drying, radiation drying, and dielectric drying. Among these, hot air drying is widely used in multiple industries due to its advantages such as ease of operation, wide applicability, and uniform drying. Hot air drying raises the air temperature through electric heating or steam heating, allowing the hot air to fully contact the material, thereby promoting moisture evaporation and achieving drying. However, traditional drying equipment still faces significant energy consumption issues and limitations in installation and relocation in practical applications. These problems are particularly prominent under the current trends of energy conservation, emission reduction, and intelligent manufacturing.

[0004] First, traditional hot air drying equipment has high energy consumption, mainly due to the heating method and thermal energy utilization efficiency. For example, while electric heating is simple to operate, electricity costs are high, especially in large-scale production, where energy consumption can account for a large portion of the overall production cost. Steam heating requires an additional boiler system, which not only increases the complexity of the equipment but also leads to additional energy waste due to heat loss. Furthermore, many traditional hot air drying equipment designs are rather crude in terms of hot air circulation, with large amounts of high-temperature gas being directly emitted without being fully utilized, increasing operating costs and negatively impacting the environment.

[0005] Secondly, traditional drying equipment has significant limitations in terms of installation and relocation. On the one hand, some equipment is bulky and structurally fixed, requiring dedicated installation sites and foundations, leading to high modification costs for companies when adjusting production layouts. On the other hand, after arriving at the workshop, the equipment typically needs to be hoisted directly to its operating location and secured to the ground with fasteners. While this method improves the stability of equipment operation, it severely limits its flexibility. If production needs change and the equipment position needs to be adjusted, the entire process becomes extremely cumbersome. Removing the fasteners is the first step, and additional hoisting equipment is often required to complete the relocation, wasting time and manpower and potentially disrupting other production processes. For companies whose production models require frequent adjustments, this fixed installation method undoubtedly increases relocation costs and reduces the adaptability of the production line.

[0006] Therefore, how to improve energy efficiency, increase the efficiency of drying equipment, and enhance the flexibility of the equipment have become urgent issues that need to be optimized and improved for existing drying equipment. Utility Model Content

[0007] The purpose of this invention is to provide a high-efficiency heat recovery drying device that has an optimized and efficient heat recovery device, can effectively reduce energy consumption, and has flexible and mobile performance to meet the needs of multiple application scenarios.

[0008] To achieve the above objectives, this utility model adopts the following solution: a high-efficiency heat recovery drying chamber with an external drying host, comprising:

[0009] A drying room, the drying room having space inside for storing materials, and an interface that connects to the internal space is provided on the outer wall at one end of the drying room.

[0010] The equipment chassis is movably installed on the interface outside the drying chamber. The outer wall of the equipment chassis facing the interface has a main air inlet. The top of the equipment chassis has an air outlet that is connected to the internal space of the drying chamber through a duct. The inside of the equipment chassis forms an air circulation channel for introducing airflow into the drying chamber from the main air inlet and then exporting the dried airflow into the drying chamber from the air outlet.

[0011] An exhaust fan, installed inside the air outlet, is used to create negative pressure inside the equipment casing to drive airflow along the airflow circulation channel;

[0012] A vertical plate is installed inside the equipment chassis, dividing the interior of the equipment chassis into a first equipment compartment and a second equipment compartment;

[0013] A heat recovery device is installed in the second equipment compartment. Inside the device are horizontal and vertical air passages arranged in a cross shape. One end of the horizontal air passage is connected to the main air inlet, and the other end is connected to a one-way air valve installed on the vertical plate.

[0014] An external evaporator is installed in the first equipment compartment and is equipped with a compressor unit connected to it via a refrigerant circulation pipeline. It is used to remove moisture from the airflow discharged by the one-way valve.

[0015] An electric air valve is installed on the vertical plate below the one-way air valve and is used to guide the airflow after dehumidification by the external evaporator back to the area below the heat recovery device.

[0016] An internal evaporator is located in the second equipment compartment below the heat recovery device and is connected to the compressor unit through a refrigerant circulation pipeline. It is used to heat the airflow returning through the electric air valve and send the heated airflow into the vertical air passage of the heat recovery device.

[0017] A condenser, installed in the second equipment compartment above the heat recovery device, is used to condense the moisture in the upward airflow from the vertical air duct.

[0018] An electric auxiliary heating device, located between the condenser and the air outlet, is used to provide final heating for the airflow entering the drying chamber after passing through the condenser.

[0019] The above solution achieves airflow circulation, heat recovery, and efficient drying through the synergistic effect of multiple functional modules. An airflow channel is formed inside the equipment casing, drawing in moisture from the drying chamber through the main air inlet. A negative pressure is created at the air outlet by an exhaust fan, driving continuous airflow circulation. A vertical plate structure divides the internal space into two independent compartments, each housing different functional devices, making the overall structure more compact and efficient. The interlaced horizontal and vertical air channels within the heat recovery device optimize heat transfer and reuse. The external evaporator works in conjunction with the compressor unit to remove moisture from the airflow, and an electric air valve guides the treated airflow back to the heat recovery device, effectively improving the drying capacity of the circulating airflow. The internal evaporator further heats the returning airflow, sending it into the vertical air channel where the condenser condenses the moisture. Finally, an electric auxiliary heating device provides final temperature regulation for the airflow entering the drying chamber, not only improving drying efficiency but also effectively reducing energy consumption.

[0020] As a further embodiment of this invention, the horizontal air duct is arranged in a zigzag pattern and runs horizontally through the heat recovery device, with continuously bent heat-conducting plates inside to improve heat exchange efficiency. This zigzag design extends the airflow path in the heat recovery device, increasing the contact area between the airflow and the heat-conducting plates, thereby improving the sufficiency of heat transfer. The continuously bent structure of the heat-conducting plates increases the guidance and uniformity of heat transfer, allowing the airflow to efficiently exchange heat at each bend. This design also slows down the airflow speed, further enhancing the heat recovery effect. In addition, the zigzag arrangement not only optimizes the space utilization inside the equipment chassis but also reduces eddies in the airflow, ensuring airflow stability. Overall, this improvement maximizes heat exchange efficiency through structural optimization, providing important support for the high efficiency and energy saving of the equipment.

[0021] As a further embodiment of this invention, the inner wall of the vertical air passage has a corrugated structure to enhance airflow turbulence. The corrugated inner wall guides the airflow through, generating disturbances and turbulence, increasing the contact area between the airflow and the inner wall, and preventing insufficient heat exchange that might occur when the airflow slides along a straight wall. This turbulence effect not only improves the speed of heat transfer but also effectively reduces cold spots and dead zones in the airflow, ensuring the uniformity and stability of the heat exchange process. Furthermore, this corrugated structure, while enhancing turbulence, also plays a reasonable role in regulating the speed and direction of the airflow, making the heat recovery process in the vertical air passage more efficient. Through this improvement, the performance of the heat recovery device is further enhanced, and the overall energy utilization efficiency of the equipment is optimized.

[0022] As a preferred embodiment of this utility model, the condenser tubes are arranged in a multi-layered staggered pattern and are provided with heat dissipation fins to improve the condensation effect.

[0023] As a preferred embodiment of this utility model, the top of the drying chamber has a circulating fan that can guide the hot airflow blown out of the air outlet into the drying chamber, thereby accelerating and optimizing the airflow circulation.

[0024] As a preferred embodiment of this utility model, casters with brake locking function are provided at the four corners of the bottom of the equipment chassis, which facilitates the movement of the equipment chassis and greatly improves the mobility of the equipment chassis, enabling the equipment to be easily adjusted or moved between different positions, which is especially advantageous when frequent changes of workstation are required in industrial production.

[0025] As a further embodiment of this invention, an auxiliary support foot is provided on one side of the caster, which can be raised and lowered. 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 role, thereby preventing displacement of the equipment due to vibration or external forces during operation. Furthermore, the cooperation between the auxiliary support foot and the caster not only balances the flexibility and stability of the equipment but also effectively extends the service life of the caster, preventing deformation or wear caused by long-term static weight bearing. This design allows the equipment to remain stable under various ground conditions, enabling safe and reliable operation on both flat factory floors and slightly sloping terrain, providing a higher level of assurance for the equipment's adaptability.

[0026] In a preferred embodiment of this invention, the auxiliary support foot includes vertical rods fixedly installed on the four corner side walls of the bottom of the equipment chassis. A movable sleeve is fitted onto each vertical rod, and the movable sleeve has a foot-operated lifting structure for driving its up-and-down movement along the vertical rod. A foot pad that can flip back and forth is hinged to the bottom end of the movable sleeve. This preferred embodiment utilizes a vertical rod and movable sleeve structure in the design of the auxiliary support foot, allowing each support point to be independently adjustable in height. The vertical rods are fixedly installed on the four corner side walls of the bottom of the equipment chassis, ensuring the stability and firmness of the support points, while the movable sleeve's height adjustment is made more convenient through the foot-operated lifting structure. The foot-operated lifting structure allows the operator to move the movable sleeve up and down with a simple foot pedal action, reducing the hassle of manual adjustment and improving operational efficiency. Furthermore, the foot pad hinged to the bottom end of the movable sleeve can flip back and forth, providing better ground contact performance. When the support foot is lowered, the foot pad can automatically adjust its flip angle according to the ground conditions, ensuring the equipment chassis remains stable on any surface and effectively distributing the weight of the entire equipment, reducing pressure on the ground. This design enhances the stability of the equipment during use, especially in environments with significant vibration or uneven ground, further ensuring the safety and reliability of equipment operation.

[0027] As a preferred embodiment of this utility model, the foot pedal lifting structure includes:

[0028] A plurality of fixed teeth are provided on the outer wall of one side of the vertical rod, and the fixed teeth are arranged at intervals along the vertical direction.

[0029] The outer wall of the movable sleeve is provided with a notch that exposes the fixed teeth, and an inclined drive disc is rotatably mounted at the notch.

[0030] The drive disc has a spiral rib extending outward from its center on one side, and the spiral rib meshes with the fixed teeth.

[0031] A coaxial spur gear is fixedly connected to the other side of the drive disk, and the spur gear can rotate through the central shaft;

[0032] A foot pedal is rotatably mounted on the central shaft of the spur gear. The foot pedal has a radially protruding fixing lug at the shaft center. The end of the fixing lug is hinged to a snap-fit ​​component that can flip left and right. The end of the snap-fit ​​component has a snap tooth that meshes with the spur gear to control the rotation of the drive disc.

[0033] The preferred embodiment of the aforementioned foot-operated lifting structure aims to achieve vertical adjustment of the movable sleeve on a vertical rod through a sophisticated mechanical structure. Fixed teeth are spaced vertically along the outer wall of the vertical rod, providing a precise adjustment track. A notch on the movable sleeve allows the drive disc to engage with the fixed teeth, thereby controlling the lifting of the sleeve. The volute ribs on the drive disc engage with the fixed teeth; combined with the volute design, this effectively converts rotational motion into vertical movement, thus driving the movable sleeve to slide up and down. A spur gear is connected to the other side of the drive disc, and its rotation is controlled by a central shaft. The foot pedal is mounted on the central shaft of the spur gear and controls the rotation of the drive disc through a hinged locking mechanism and locking teeth, thus achieving the lifting operation. The locking mechanism engages with the spur gear through the locking teeth, ensuring that the force generated by the drive disc during rotation is precisely transmitted to the movable sleeve to drive its vertical movement. Through this structural design, the foot-operated lifting structure can efficiently and precisely adjust the height of the support foot and provides excellent force transmission. The foot pedal is easy to operate; the height can be adjusted simply by stepping on it, greatly facilitating users in adjusting the height of the equipment chassis in different environments.

[0034] As a further embodiment of this invention, multiple return air plates are detachably installed on the outer wall of the second equipment compartment below the heat recovery device to supplement the airflow entering the vertical air duct. The airflow circulation volume is precisely controlled according to the airflow requirements inside the equipment casing, avoiding the impact of excessive or insufficient airflow on drying efficiency and heat exchange effect, while also effectively reducing energy waste.

[0035] In summary, the advantages of this utility model compared to existing technologies are as follows: This utility model achieves significant improvements in energy consumption optimization and installation / relocation compared to existing technologies. It employs a high-efficiency heat recovery system, which, through a staggered arrangement of horizontal and vertical air ducts, improves the heat recovery rate and reduces heat loss. During operation, moisture enters the equipment casing through the main air inlet and forms an airflow circulation under the action of the exhaust fan. The zigzag horizontal air duct design of the heat recovery device extends the airflow path, increasing the contact area with the heat-conducting plate, thereby improving heat exchange efficiency. Simultaneously, the corrugated inner wall of the vertical air duct increases turbulence, making heat transfer more uniform and effectively avoiding cold spots and dead zones in the airflow, thus improving overall heat utilization efficiency. Furthermore, the external evaporator inside the equipment casing works in conjunction with the compressor unit to efficiently remove moisture from the airflow, and the dehumidified airflow is returned to the heat recovery device via an electric air valve, further improving drying efficiency. Before the drying airflow enters the drying chamber, it undergoes final processing by a condenser and an electric auxiliary heating device, achieving precise temperature control and ensuring the uniformity and stability of material drying. These optimization measures have enabled the equipment to improve drying efficiency while effectively reducing energy consumption and minimizing energy waste.

[0036] Furthermore, this invention offers significant advantages in installation and relocation. Traditional drying equipment typically uses a fixed installation method, requiring hoisting and positioning, and securing it to the ground with fasteners. When production needs change, the relocation and adjustment process is cumbersome and time-consuming. In contrast, this equipment features a movable chassis design, equipped with casters with brake locking functions at the four corners of the bottom. This allows the chassis to be easily adjusted or moved between different locations, greatly improving the adaptability of the production line. After the chassis is moved to the target position, the operator can lower the auxiliary support legs to replace the casters, ensuring the stability of the equipment and preventing displacement due to vibration or external forces. In addition, the application of a foot-operated lifting structure makes height adjustment of the auxiliary support legs more convenient, and the foot pads can automatically rotate and adjust according to ground conditions, ensuring stability even on uneven ground. This design not only improves the flexibility of the equipment but also extends the service life of the casters and reduces wear and tear caused by long-term static weight bearing. This structure, combining mobility and stability, allows the equipment to adapt to more production environments, meeting the needs of enterprises for flexible equipment layout and improving overall production efficiency. Attached Figure Description

[0037] Figure 1 This is a three-dimensional view of the entire utility model, as well as an enlarged view of a local area in the figure.

[0038] Figure 2 This is a cross-sectional view of the entire utility model, as well as a schematic diagram of airflow and an enlarged view of a local area in the figure.

[0039] Figure 3 This is a partial cross-sectional view of the present invention, and a schematic diagram of airflow.

[0040] Figure 4 This is one of the perspective views of the equipment chassis in this utility model.

[0041] Figure 5 for Figure 4 A magnified view of point A in the middle.

[0042] Figure 6 This is one of the cross-sectional views of the equipment chassis in this utility model, as well as an enlarged view of a partial area in the figure.

[0043] Figure 7 This is the second cross-sectional view of the equipment chassis in this utility model.

[0044] Figure 8 This is a second perspective view of the equipment chassis in this utility model, as well as an enlarged view of a partial area in the figure.

[0045] Figure 9 This is the third perspective view of the equipment chassis in this utility model, and an enlarged view of one of the auxiliary support legs and foot pedal lifting structures after disassembly.

[0046] Figure 10 This is the fourth perspective view of the equipment chassis in this utility model, and an exploded view of one of the auxiliary support legs and foot pedal lifting structures in the figure.

[0047] Figure 11 for Figure 10 A magnified view of point B in the middle.

[0048] Figure 12 This is the third cross-sectional view of the equipment chassis in this utility model, as well as an enlarged view of a partial area in the figure.

[0049] Explanation of reference numerals in the attached diagram: 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 plate; 16. Casters; 17. Auxiliary support feet; 18. Cooling fan; 31. Horizontal air duct; 32. Vertical air duct; 33. Heat conduction plate; 10. 0. Foot pad; 101. Vertical rod; 102. Fixed tooth; 103. Movable sleeve; 104. Notch; 105. Drive disc; 106. Scroll rib; 107. Spur gear; 108. Foot pedal; 109. Fixed ear; 110. Snap-fit ​​part; 111. Snap tooth; 112. Support shaft; 131. First equipment compartment; 132. Second equipment compartment; 200. Drying room; 201. Circulating fan; 202. Connecting interface; 203. Drainage hood. Detailed Implementation

[0050] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0051] Furthermore, spatial terms may be used, such as "below," "lower," "from the inside out," "above," "upper," and similar terms. These relational terms are used to facilitate the description of the relationship between some elements or features in the drawings and other elements or features. These spatial relational terms include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be rotated 90 degrees or otherwise to different orientations, and the spatially related adjectives used therein can be interpreted in the same way. Therefore, they should not be construed as limiting the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0052] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Figures 1 to 12The diagram illustrates a high-efficiency heat recovery drying chamber with an external drying unit. It includes a drying chamber 200 with internal space for placing materials to be dried. An interface 202, communicating with the internal space, is provided on the outer wall of one end of the drying chamber 200. An equipment housing 1 is movably mounted on the interface 202 outside the drying chamber 200. The outer wall of the equipment housing 1 facing the interface 202 has a main air inlet 12, and the top of the equipment housing 1 has an air outlet 11 communicating with the internal space of the drying chamber 200 via a guide hood 203. An exhaust fan 2 is installed inside the air outlet 11. When activated, airflow from inside the drying chamber 200 enters the equipment housing 1 through the main air inlet 12, passes through the airflow channel for drying airflow inside the equipment housing 1, and exits through the guide hood 203 from the air outlet 11. A circulating fan 201 is located on the top of the drying chamber 200, guiding the hot airflow from the air outlet 11 into the drying chamber 200. Specifically, a vertical plate 13 is vertically installed inside the equipment chassis 1 to divide the space inside the equipment chassis 1 into a first equipment compartment 131 and a second equipment compartment 132. A heat recovery device 3 is installed in the second equipment compartment 132, located on one side of the main air inlet 12. The heat recovery device 3 has multiple horizontally spaced air ducts 31 with their inlets connected to the main air inlet 12. Two one-way valves 6 are installed on the vertical plate 13 corresponding to the heat recovery device 3. The outlet of the horizontal air ducts 31 faces the inlet of the one-way valves 6. When the airflow enters the horizontal air ducts 31, it flows out of the horizontal air ducts 31 and enters the first equipment compartment 131 through the one-way valves 6. An external evaporator 4 is installed in the first equipment compartment 131, opposite the one-way valves 6. Below the external evaporator 4 is a compressor unit 5 connected via a refrigerant circulation pipeline. To prevent the external evaporator 4 from overheating due to prolonged operation, a cooling fan 18 is installed at the front of the equipment casing 1, on the side facing outwards from the drying chamber 200, to dissipate heat from the external evaporator 4. The external evaporator 4 can perform preliminary dehumidification and drying of the moisture in the airflow discharged by the one-way valve 6. An electric air valve 7 is installed on the vertical plate 13 below the one-way valve 6. After the airflow after preliminary dehumidification and drying is guided downwards into the space where the compressor unit 5 is located, it passes through the electric air valve 7 and is then guided back to the second equipment compartment 132 below the heat recovery device 3. At this time, an internal evaporator 8 is installed in the second equipment compartment 132 behind the electric air valve 7. This internal evaporator 8 is also connected to the compressor unit 5 through a refrigerant circulation pipeline. The airflow from the electric air valve 7 is initially heated and dehumidified again after passing through the internal evaporator 8. Several vertical air passages 32 pass through the vertical pipe in the heat recovery device 3. The airflow heated by the internal evaporator 8 enters the air inlet at the bottom of the vertical air passage 32. After heat exchange with the airflow in the horizontal air passage 31 in the heat recovery device 3, the airflow flows out upward from the top of the vertical air passage 32.A condenser 9 is installed above the outlet of the vertical air duct 32, and an electric auxiliary heating device 10 is installed above the condenser 9. The inlet of the air outlet 11 is located above the electric auxiliary heating device 10. The hot airflow flowing upward from the top of the vertical air duct 32 first passes through the condenser 9 to condense and remove residual moisture, and then passes through the electric auxiliary heating device 10 for final heating before entering the air outlet 11 and being guided back into the drying chamber 200. The entire flow path of the airflow shown in the above embodiment, from the main air inlet 12 to the air outlet 11 and then being discharged, is the airflow circulation for drying airflow formed inside the equipment casing 1 mentioned earlier. Moisture is introduced into the drying chamber 200 through the main air inlet 12, and a negative pressure is formed at the air outlet 11 by the exhaust fan 2, driving the continuous circulation of airflow to form an airflow channel inside the equipment casing 1. The airflow channel is equipped 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, forming an airflow circulation and heat exchange mechanism that effectively enhances the drying capacity of the circulating airflow. Finally, an electric auxiliary heating device 10 is used to regulate the temperature of the airflow entering the drying chamber 200. To precisely control the airflow circulation volume according to the airflow requirements inside the equipment casing 1, and to avoid excessive or insufficient airflow affecting the drying efficiency and heat exchange effect, a return air plate 14 is detachably installed on the outer wall of the second equipment compartment 132 below the heat recovery device 3. This allows for flexible replenishment of fresh airflow, ensuring the stability and balance of the circulation. Based on this, sensors can be installed along the airflow path using existing sensing technology. Through an industrial control host and program, the entire system can achieve more efficient heat recovery and airflow management, not only improving drying efficiency but also effectively reducing energy consumption, making it ideal for high-efficiency and energy-saving drying operations.

[0053] Among them, such as Figure 2 and Figure 3 as well as Figure 6 and Figure 7 As shown, to further improve heat exchange efficiency, the horizontal air ducts 31 are arranged horizontally in a zigzag pattern and run through the heat recovery device 3, with continuously bent heat-conducting plates 33 inside to improve heat exchange efficiency. The inner wall of the vertical air ducts 32 has a corrugated structure to increase airflow turbulence. The horizontal air ducts 31 and 32 run through the heat recovery device 3 independently, that is, the horizontal air ducts 31 and 32 are arranged in a cross shape and do not intersect. Heat exchange between the horizontal air ducts 31 and 32 is achieved through heat conduction. In addition, in this embodiment, the condenser tubes of the condenser 9 are arranged in a multi-layered staggered pattern and are equipped with heat dissipation fins to improve the condensation effect. The condenser 9 can be designed with reference to commonly used existing technologies.

[0054] In addition, to improve the mobility and stability of the drying equipment and adapt it to the needs of different sites, such as... Figures 1 to 12As shown, casters 16 are located at the four corners of the bottom of the equipment chassis 1, and auxiliary support feet 17 are provided on one side of each caster 16. Each auxiliary support foot 17 includes a vertical rod 101 fixedly installed on the four corner side walls of the bottom of the equipment chassis 1. A movable sleeve 103 is fitted onto the vertical rod 101, and the movable sleeve 103 has a foot-operated lifting structure for driving it to move up and down along the vertical rod 101. A foot pad 100 that can flip back and forth is hinged to the bottom end of the movable sleeve 103. When the auxiliary support foot 17 is lowered, the foot pad 100 can automatically adjust its flip angle according to the ground conditions, ensuring the equipment chassis remains stable on any surface and effectively distributing the equipment weight, reducing pressure on the ground. This design improves the stability of the equipment during use, especially in environments with significant vibration or uneven ground, further ensuring the safety and reliability of equipment operation. It also effectively extends the service life of the casters, avoiding deformation or wear caused by long-term static weight bearing. It is important to note that the foot-operated lifting structure includes several fixed teeth 102 disposed on the outer wall of one side of the vertical rod 101. These fixed teeth 102 are arranged at intervals in the vertical direction to form a rack shape. The outer wall of the movable sleeve 103 has a notch 104 that exposes the fixed teeth 102, and a support shaft 112 that curves upwards is located at the notch 104. A circular drive disc 105 is rotatably mounted on the support shaft 112. The drive disc 105 is inclined relative to the vertical rod 101, and one side of the drive disc 105 has a spiral rib 106 extending outwards from its center. Because the drive disc 105 is inclined, the spiral 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 drive disc 105. One end of the support shaft 112 passes through the side of the spur gear 107 and is connected to a foot pedal 108, which can rotate around the support shaft 112. A protruding fixing ear 109 is provided at the position where the foot pedal 108 fits onto the support shaft 112. The extending direction of this protruding fixing ear 109 is the same as the radial outward direction along the support shaft 112. A reversible snap-fit ​​member 110 is hinged to the end of the fixing ear 109, and the end of the snap-fit ​​member 110 has a locking tooth 111 that can engage with the spur gear 107. When the foot pedal 108 rotates, the locking tooth 111 engages with the spur gear 107, causing the drive disc 105 to rotate. Since only one side of the spiral rib 106 engages with the fixing tooth 102, the movable sleeve 103 moves along the vertical rod 101 as the spiral rib 106 completes its rotation. This enables the raising and lowering operation of the auxiliary support foot 17. When it is necessary to raise the auxiliary support foot 17, flip the locking piece 110 to the other side and repeatedly step on the foot pedal 108. The locking teeth 111 will engage the spur gear 107 and rotate in the opposite direction, which will drive 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.

[0055] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heat recovery drying chamber with an external drying unit, characterized in that, include: A drying room (200) has a space for storing materials inside, and an interface (202) that can communicate with its internal space is provided on the outer wall at one end of the drying room (200). The equipment chassis (1) is movably installed on the interface (202) outside the drying chamber (200). The outer wall of the equipment chassis (1) facing the interface (202) has a main air inlet (12). The top of the equipment chassis (1) has an air outlet (11) that is connected to the internal space of the drying chamber (200) through a duct (203). The equipment chassis (1) has an air circulation channel inside for introducing airflow into the drying chamber (200) from the main air inlet (12) and then exporting the dried airflow to the drying chamber (200) from the air outlet (11). An exhaust fan (2) is installed inside the air outlet (11) to create a negative pressure inside the equipment casing (1) to drive the airflow along the airflow circulation channel; A vertical plate (13) is vertically installed inside 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). The heat recovery device (3) is installed in the second equipment compartment (132). Inside it are horizontal air passages (31) and vertical air passages (32) arranged in a cross shape. One end of the horizontal air passage (31) is connected to the main air inlet (12), and the other end is connected to the 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 equipped with a compressor unit (5) connected by a refrigerant circulation pipeline below it to remove moisture from the airflow discharged by the one-way valve (6); An electric air valve (7) is installed on the vertical plate (13) below the one-way air valve (6) to guide the airflow after dehumidification by the external evaporator (4) back to the heat recovery device (3); An internal evaporator (8) is located in the second equipment compartment (132) below the heat recovery device (3) and is connected to the compressor unit (5) through a refrigerant circulation pipeline. It is used to heat the airflow returning through the electric air valve (7) and send the heated airflow into the vertical air passage (32) of the heat recovery device (3). The condenser (9) is installed in the second equipment compartment (132) above the heat recovery device (3) to condense the moisture in the upward airflow in the vertical air passage (32); An electric auxiliary heating device (10) is located between the condenser (9) and the air outlet (11) to provide final heating for the airflow entering the drying chamber (200) after passing through the condenser (9).

2. The high-efficiency heat recovery drying chamber with an external drying host according to claim 1, characterized in that, The horizontal air passage (31) is arranged horizontally in a zigzag shape and runs through the heat recovery device (3). The interior is provided with a continuously bent heat-conducting plate (33) to improve the heat exchange efficiency.

3. The high-efficiency heat recovery drying chamber with an external drying host according to claim 2, characterized in that, The inner wall of the vertical air passage (32) has a corrugated structure to increase the turbulence effect of the airflow.

4. The high-efficiency heat recovery drying chamber with an external drying host according to claim 1, characterized in that, The condenser (9) has a multi-layered staggered arrangement of condenser tubes and is equipped with heat dissipation fins to improve the condensation effect.

5. The high-efficiency heat recovery drying chamber with an external drying host according to claim 1, characterized in that, The top of the drying chamber (200) has a circulating fan (201) that can guide the hot airflow blown out of the air outlet (11) into the drying chamber (200).

6. The high-efficiency heat recovery drying chamber with an external drying host according to claim 1, characterized in that, Casters (16) with brake locking function are provided at the four corners of the bottom of the equipment housing (1) to facilitate the movement of the equipment housing (1).

7. The high-efficiency heat recovery drying chamber with an external drying host according to claim 6, characterized in that, An auxiliary support foot (17) is provided on one side of the caster (16) in a height-adjustable manner.

8. The high-efficiency heat recovery drying chamber with an external drying host according to claim 7, characterized in that, The auxiliary support foot (17) includes vertical rods (101) fixedly installed on the four corner side walls of the bottom of the equipment chassis (1). A movable sleeve (103) is fitted on the vertical rod (101). The movable sleeve (103) is provided with a foot pedal lifting structure for driving it to move up and down along the vertical rod (101). The bottom end of the movable sleeve (103) is hinged with a foot pad (100) that can flip back and forth.

9. A high-efficiency heat recovery drying chamber with an external drying host according to claim 8, characterized in that, The foot-operated lifting structure includes: A plurality of fixed teeth (102) are provided on the outer wall of one side of the vertical rod (101), and the fixed teeth (102) are arranged at intervals along the vertical direction; The outer wall of the movable sleeve (103) is provided with a notch (104) that exposes the fixed teeth (102), and an inclined drive disk (105) is rotatably installed at the notch (104). The drive disk (105) has a spiral rib (106) extending outward from its center on one side, and the spiral rib (106) meshes with the fixed teeth (102). A coaxial spur gear (107) is fixedly connected to the other side of the drive disk (105), and the spur gear (107) can rotate through 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 provided radially at the axis position of the foot pedal (108). A snap-fit ​​member (110) that can be flipped left and right is hinged to the end of the fixing ear (109). The end of the snap-fit ​​member (110) is provided with a snap tooth (111) that meshes with the spur gear (107) to control the rotation of the drive disk (105).

10. A high-efficiency heat recovery drying chamber with an external drying host according to any one of claims 1 to 9, characterized in that, Multiple return air plates (14) are detachably installed on the outer wall of the second equipment compartment (132) below the heat recovery device (3) to supplement the airflow into the vertical air duct (32).

Images