Medicinal material hot air circulation oven

Abstract

The utility model relates to medicinal material processing technical field, concretely relates to a medicinal material hot -blast circulation oven, and the main box door sets up the first electromagnetic board, closes and electrifies and adsorbs the drying warehouse opening can magnetically attract material and compresses the first sealing strip, one box door is provided with recessed groove and is embedded with toughened glass, and the recessed groove edge is with magnetically attractable material and second sealing strip, and independent observation door is equipped with second electromagnetic board, and after closing, electrification adsorbs the recessed groove and compresses the second sealing strip, this design realizes the perspective observation under the closed condition of main door, and prevents the instantaneous heat leakage of main door opening, and the double electromagnetic adsorption cooperation compression sealing effectively blocks the observation window heat conduction and the gap heat loss, overcomes the cold bridge effect and the sealing aging defect, when the equipment works, the fan suction drying warehouse top moisture pumps into the condensing box, and the semiconductor board refrigeration end cooperates with the fin condensation dehumidification, and after dehydration, air is heated by electric heater, forms the downward penetrating hot -blast circulation from the exhaust hole, reduces the heat loss significantly while guaranteeing the visibility, improves the drying stability and energy efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medicinal material processing technology, and in particular to a hot air circulating drying oven for medicinal materials. Background Technology

[0002] ① In traditional hot air circulating drying operations for medicinal herbs, operators need to periodically observe the condition of the herbs inside the oven, such as the degree of dryness or any abnormalities. However, since the oven relies primarily on a sealed chamber and high-temperature hot air for efficient drying, each time the oven door is opened for visual inspection, a large amount of hot air inside the oven is rapidly lost. This sudden heat loss not only causes a significant drop in drying temperature in the short term, interrupting the uniform drying process, but also forces the drying system to expend a large amount of energy to reheat the cold air to the operating temperature, significantly increasing overall operating energy consumption. Frequent opening and closing of the oven door for inspection is a necessary yet unavoidable operational contradiction for maintaining drying process control.

[0003] ② To reduce heat loss caused by opening the door, a common improvement in existing technology is to create an opening in the main structure of the oven door and embed a fixed glass panel as an observation window. This design allows operators to directly observe the approximate state of the materials inside the oven through the glass window without opening the main door. This method does alleviate the problem of drastic temperature drop and heat leakage caused by fully opening the door to some extent, because it allows for rough visual monitoring without disrupting the sealing structure of the entire chamber, improving operational convenience and reducing some of the heat waste caused by opening and closing the door.

[0004] ③ However, while introducing a fixed glass observation window solves the problem of frequent door openings, it also brings new challenges to heat loss. Although glass is transparent and easy to observe, its insulation performance is far inferior to the high-quality insulated walls and well-sealed metal doors commonly used in ovens. Heat continuously dissipates into the external environment through the glass observation window at a rate higher than the thermal conductivity of the surrounding chamber materials. More importantly, even with sealing strips installed at the edges of the observation window opening, long-term thermal expansion and contraction, or aging and loosening, weaken the seal, creating a fixed "cold bridge effect." This situation results in a relatively weak heat leakage point during oven operation, causing continuous, slow, but significant heat loss. Unlike the instantaneous heat reduction when the door is fully opened, this continuous heat loss through the observation window is constant and, with the accumulation of operating time, significantly increases the system's additional energy consumption. Utility Model Content

[0005] The purpose of this invention is to provide a hot air circulating drying oven for medicinal materials, which solves the problem of continuous heat loss caused by insufficient heat insulation performance of the glass observation window and the cold bridge effect at the edge seal in the prior art.

[0006] To achieve the above objectives, this utility model provides a hot air circulating drying oven for medicinal materials, including an oven with a drying chamber inside. The opening of the drying chamber is made of a magnetic material and is equipped with a first sealing strip. Doors are installed on both sides of the opening of the drying chamber via hinges. A first electromagnetic plate is provided on the side of the door that is in contact with the opening of the drying chamber. A groove is provided on one of the doors, and tempered glass is fixedly installed in the groove. The opening of the groove is made of a magnetic material and is equipped with a second sealing strip. An observation door is installed in the groove via a hinge, and a second electromagnetic plate is provided on the side of the observation door that is in contact with the groove.

[0007] The drying chamber has several exhaust holes on its left, right and bottom side walls. A condenser is bolted to one side of the top of the drying chamber. The condenser is divided into two chambers by a semiconductor board.

[0008] The semiconductor plate's heating end faces the upper compartment inside the condensing chamber. An exhaust fan is fixedly installed on the side wall of the upper compartment inside the condensing chamber. The semiconductor plate's cooling end faces the lower compartment inside the condensing chamber and is equipped with aluminum alloy fins.

[0009] The condenser box is provided with a drain connector on the outside of the chamber located below the semiconductor board. The condenser box is connected to the electric heater via a pipe on the side opposite to the drain connector and the chamber located below the semiconductor board.

[0010] The electric heater is bolted to the top of the oven and adjacent to the condenser. The output end of the electric heater extends into the oven through a pipe and is split, so as to achieve separate connection with the exhaust port.

[0011] The condenser box is located away from the drain connector and opposite the compartment below the semiconductor board. The pumping end of the fan is installed at the top of the oven through a pipe, and the pipe extends to the top of the oven chamber to achieve through connection.

[0012] This utility model discloses a hot air circulating drying oven for medicinal materials. Its core innovation lies in optimizing the sealing structure of the drying chamber opening, achieving coordinated control of observation function and efficient heat insulation. Specifically, the oven body contains a drying chamber. The edge of the drying chamber opening is made of a magnetically pleasing material and fitted with a first sealing strip. Two parallel doors are hinged to the sides of the opening. Each door has a first electromagnetic plate embedded inside. When the door is closed, the electromagnetic plate is energized, generating a strong magnetic force that presses the door tightly against the magnetically pleasing edge of the drying chamber opening, simultaneously compressing the first sealing strip to form the main sealing interface, eliminating door gaps and creating a highly airtight chamber. One door has a groove on its surface, within which a transparent tempered glass is fixedly embedded as an observation window. The edge of the groove opening is also made of a magnetically pleasing material and fitted with a second sealing strip. An independent observation door with hinges is installed within the groove. The inner side of the observation door is fitted with a second electromagnetic plate. When the observation door is closed, the electromagnetic plate is energized, attracting the edge of the groove and compressing the second sealing strip, forming a localized dynamic seal. This design allows operators to directly monitor the interior of the drying chamber through tempered glass by simply opening a small observation door, while the main chamber door remains closed throughout, avoiding the instantaneous large-scale leakage of hot air caused by opening the main chamber door in traditional technologies. Simultaneously, the dual electromagnetic adsorption structure, combined with a compression-type sealing strip, forms a two-way physical isolation, effectively blocking the continuous heat conduction path through the observation window glass and edge gaps, significantly reducing the "cold bridge effect" and solving the problem of heat loss caused by seal aging and loosening. Overall, while ensuring visibility, heat loss is minimized, ultimately achieving stability in the drying process and high energy efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the drying chamber in an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the observation door in an embodiment of this utility model.

[0017] Figure 4 This is a schematic diagram of the overall planar structure of an embodiment of this utility model.

[0018] In the diagram: 101, Oven; 102, Drying Chamber; 103, First Sealing Strip; 104, Door; 105, First Electromagnetic Plate; 106, Groove; 107, Tempered Glass; 108, Second Sealing Strip; 109, Observation Door; 110, Second Electromagnetic Plate; 111, Exhaust Hole; 112, Condensation Chamber; 113, Semiconductor Plate; 114, Exhaust Fan; 115, Aluminum Alloy Fins; 116, Drain Connector; 117, Electric Heater; 118, Fan. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] Please see Figures 1-4 .

[0021] This utility model provides a hot air circulating drying oven for medicinal materials. The main body is an oven 101, inside which is a core working chamber 102. The opening edge of the drying chamber 102 is made of a magnetically pleasing metal material, and a first sealing strip 103 is embedded in this edge. Two doors 104, hinged together, are arranged parallel to each other at the opening of the drying chamber 102. Each door 104 has a first electromagnetic plate 105 embedded on the side that meets the opening of the drying chamber 102. When the operator closes the door 104, the first electromagnetic plate 105 is energized, generating a strong magnetic force that causes the door 104 to adhere tightly to the magnetically pleasing material at the opening of the drying chamber 102. Simultaneously, the first sealing strip 103 is compressed to seal the door gap, thus creating a highly airtight drying chamber 102 environment, maximizing the drying effect. To reduce heat leakage, a rectangular groove 106 is provided on one of the cabinet doors 104. A transparent tempered glass 107 is fixedly embedded in the groove 106 with high-temperature resistant adhesive as an observation window. The opening edge of the groove 106 is also made of magnetic material and is equipped with a second sealing strip 108. A small observation door 109 is installed in the groove 106 through an independent hinge. A second electromagnetic plate 110 is embedded on the side of the observation door 109 that is in contact with the groove 106. When the observation door 109 is closed, the second electromagnetic plate 110 is energized to attract the edge of the groove 106 and compress the second sealing strip 108, forming a partially sealed observation channel. The operator only needs to open the observation door 109 to directly observe the internal status of the drying chamber 102, which significantly reduces the risk of heat loss caused by opening the main cabinet door 104.

[0022] Multiple sets of exhaust holes 111 are evenly distributed on the left, right, and bottom side walls of the drying chamber 102 to achieve multi-directional hot air ejection. A condenser box 112 is fixedly installed on one side of the top of the drying chamber 101 by bolts. The interior of the condenser box 112 is strictly divided into two independent upper and lower chambers by a semiconductor plate 113. The heating end of the semiconductor plate 113 faces the upper chamber, and an exhaust fan 114 is fixedly installed on the side wall of the upper chamber by screws to force the exhaust of waste heat generated by the heating end. The cooling end of the semiconductor plate 113 faces the lower chamber (i.e., the dehumidification chamber), and multiple sets of aluminum alloy fins 115 are tightly attached to the surface of the cooling end to enhance heat exchange. A condenser box 112 is installed at the bottom corresponding to the bottom of the dehumidification chamber. The drain connector 116 is used for condensate drainage. The other side of the top of the dehumidification chamber is connected to the inlet of the electric heater 117 through a sealed pipe. The electric heater 117 is bolted to the top of the oven 101 and adjacent to the condenser 112. The output end of the electric heater 117 is connected to a diversion pipe, which extends into the oven 101 and communicates with the exhaust vents 111 of all drying chambers 102. A fan 118 is fixed on the outer wall of the dehumidification chamber of the condenser 112 opposite to the drain connector 116. The pumping end of the fan 118 is connected to the air inlet of the dehumidification chamber through a flange. The suction end of the fan 118 passes through the top of the oven 101 through an insulated pipe and extends into the top space inside the drying chamber 102.

[0023] Working principle: First, the drying chamber 102 is sealed by two parallel doors 104. When the operator closes the doors 104, the first electromagnetic plate 105 is energized to generate magnetic attraction, tightly adhering the doors 104 to the magnetically adsorbable material at the opening of the drying chamber 102. This compresses the first sealing strip 103, effectively sealing the door gap and ensuring that the interior of the drying chamber 102 forms a basically sealed chamber, minimizing heat leakage. One of the doors 104 is designed with an observation groove 106, in which tempered glass 107 is fixedly embedded. The opening of the groove 106 is also equipped with a second sealing strip 108 and an openable observation door 109. When the observation door 109 is closed, the second electromagnetic plate 110 on it is energized to attract the magnetically adsorbable material at the groove 106 and compress the second sealing strip 108 to achieve a partial seal. This allows the operator to open only the small observation door 109 without opening the main door 104. 09 allows for direct inspection of the medicinal materials or monitoring of equipment operation within the drying chamber 102 through the tempered glass 107, significantly reducing the risk of large-scale heat loss and sudden temperature drops in the drying chamber 102 caused by opening the chamber for observation, and improving the convenience of process control and the temperature stability of drying. The core hot air dehumidification circulation system of the equipment is jointly constructed by the condenser box 112 inside and at the top of the drying oven 101, the electric heater 117, and the fan 118. The working airflow originates inside the drying chamber 102: the fan 118 installed at the top of the drying oven 101 has its suction end connected to the top of the drying chamber 102 through a pipe, continuously extracting the high-temperature and high-humidity air gathered at the top of the drying chamber 102; the pumping end of the fan 118 pressurizes and pumps the extracted high-temperature and high-humidity air into the chamber (i.e., dehumidification chamber) located below the semiconductor board 113 in the condenser box 112 through a pipe; inside the electric heater 117, the air is precisely heated to the set temperature to obtain drying heat energy. The heated, high-temperature dry air then enters the oven 101 through pipes and is evenly distributed to numerous pre-set exhaust holes 111 on the bottom and left and right side walls of the drying chamber 102 via a diversion structure. The hot air is ejected from these exhaust holes 111 on the bottom and sides of the drying chamber 102, forming a hot airflow field from bottom to top. This hot air penetrates the layers of medicinal materials from bottom to top, and conducts efficient heat exchange with the damp and cold medicinal materials. This not only raises the temperature of the medicinal materials and causes them to release water, but the airflow itself also absorbs the moisture evaporated from the medicinal materials, gradually transforming into a high-temperature but high-humidity waste heat airflow. The hot air carrying a large amount of moisture is driven by heating convection and negative pressure at the top to continue rising to the top outlet of the drying chamber 102. The fan 118 continues to work, drawing the high-temperature and high-humidity air gathered here out from the top of the drying chamber 102 and forcibly drawing it into the dehumidification chamber located below the semiconductor board 113 in the condenser box 112 through pipes.Inside the dehumidification chamber of the condenser box 112, the cooling end of the key component, the semiconductor board 113, performs condensation and dehumidification. The surface temperature of the cooling end is low, and the closely attached aluminum alloy fins 115 greatly expand the heat exchange area. When hot, humid air flows over these fin surfaces, whose temperature is far below the air dew point, water vapor in the air quickly condenses into droplets upon contact with the condenser, adhering to the fin surface and collecting and dripping down. The condensate collected at the bottom of the dehumidification chamber of the condenser box 112 is discharged from the equipment periodically or continuously through the drain connector 116, achieving moisture removal. Simultaneously, the heating end of the semiconductor board 113 is located in the condenser box 112. The upper compartment generates heat during operation, causing the temperature inside to rise. An exhaust fan 114 installed on the side wall of this compartment continuously operates, forcibly expelling the accumulated waste heat to the external environment to dissipate the heat generated by the heating end of the semiconductor board 113 and ensure stable cooling performance. After removing liquid water from the high-humidity air, the remaining air temperature has dropped to near the dew point, but its sensible heat and water vapor partial pressure have been significantly reduced (i.e., relative humidity decreases, and absolute moisture content decreases). The cold air that has completed the initial condensation and dehumidification is then forcefully drawn in by the pump end of the fan 118, beginning the next cycle. The air is first pressurized and fed into the electric heater 117, where it is reheated efficiently into dry hot air based on the residual sensible heat contained in the previous cycle. This hot air is then injected again into the drying chamber 102 from the bottom and side exhaust vents 111 of the oven 101, initiating a new round of heating, moisture absorption, and dehumidification processes. Thus, the airflow forms a strict unidirectional closed loop between the drying chamber 102 (heating and moisture absorption), the fan 118 (forced drive), the condenser 112 (semiconductor condensation and dehydration), and the electric heater 117 (energy replenishment and reheating): hot air enters from the bottom of the drying chamber 102 → drying chamber The airflow from bottom to top passes through the medicinal materials inside drying chamber 102 (absorbing moisture and raising temperature) → is extracted from the top of drying chamber 102 (high humidity gas) → passes through the dehumidification chamber at the bottom of condenser 112 (condensation and water removal) → is drawn in by fan 118 (pressurized delivery) → passes through electric heater 117 (supplementary heating) → returns to the bottom air inlet of drying chamber 102. The entire cycle has high energy utilization. The semiconductor board 113 precisely controls temperature and dehumidifies, reducing reheat energy consumption. The bottom-to-top hot air pattern throughout conforms to the optimal kinetic characteristics of heat and moisture exchange, ensuring uniform heating of the medicinal materials, efficient removal of moisture, and recycling of sensible heat from the air, significantly improving drying efficiency and quality.

[0024] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A hot air circulating drying oven for medicinal materials, comprising an oven (101), characterized in that: The oven (101) has a drying chamber (102) inside. The opening of the drying chamber (102) is made of magnetic material and is provided with a first sealing strip (103). The opening of the drying chamber (102) is connected to the doors (104) on both sides by hinges. The door (104) is connected to the opening of the drying chamber (102) by a first electromagnetic plate (105). One set of doors (104) has a groove (106). Tempered glass (107) is fixedly installed in the groove (106). The opening of the groove (106) is made of magnetic material and is provided with a second sealing strip (108). The observation door (109) is connected to the groove (106) by hinges. The observation door (109) is connected to the groove (106) by a second electromagnetic plate (110).

2. The hot air circulating drying oven for medicinal materials as described in claim 1, characterized in that: The drying chamber (102) has several exhaust holes (111) on its left, right and bottom side walls. A condenser (112) is bolted to one side of the top of the drying chamber (101). The condenser (112) is divided into two chambers by a semiconductor board (113).

3. The hot air circulating drying oven for medicinal materials as described in claim 2, characterized in that: The heating end of the semiconductor plate (113) faces the upper compartment inside the condenser box (112). An exhaust fan (114) is fixedly installed on the side wall of the upper compartment inside the condenser box (112). The cooling end of the semiconductor plate (113) faces the lower compartment inside the condenser box (112) and is provided with aluminum alloy fins (115).

4. A hot air circulating drying oven for medicinal materials as described in claim 3, characterized in that: A drain connector (116) is provided on the outside of the condenser (112) opposite to the compartment located below the semiconductor plate (113). The condenser (112) is connected to the electric heater (117) via a pipe on the side opposite to the drain connector (116) and opposite to the compartment located below the semiconductor plate (113).

5. A hot air circulating drying oven for medicinal materials as described in claim 4, characterized in that: The electric heater (117) is bolted to the top of the oven (101) on the side adjacent to the condenser (112). The output end of the electric heater (117) extends into the oven (101) through a pipe and is split to achieve separate connection with the exhaust port (111).

6. A hot air circulating drying oven for medicinal materials as described in claim 5, characterized in that: The condenser box (112) is located away from the drain connector (116) and has a pumping end of a fan (118) opposite to the compartment located below the semiconductor board (113). The suction end of the fan (118) is installed at the top of the oven (101) through a pipe, and the pipe extends to the top of the drying chamber (102) to achieve through connection.

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