Heating and conveying integrated hot air device

Abstract

The utility model relates to a kind of heating delivery integrated hot air equipment, belong to hot air equipment technical field, including shell, gear box water cooling system is installed on shell, rotor set is rotationally arranged inside shell, frequency conversion motor is equipped at one side of shell, frequency conversion motor is connected with rotor set transmission by gear box;Shell and gear box water cooling system outside cover are equipped with main machine enclosure, frequency conversion motor outside cover is equipped with motor enclosure, main machine enclosure and motor enclosure are closely connected;New air inlet sleeve pipe assembly is further equipped on main machine enclosure, new air inlet sleeve pipe assembly is fixedly connected on air inlet pipe of shell, new air inlet sleeve pipe assembly is simultaneously communicated with the internal area of main machine enclosure and motor enclosure;The utility model can be widely used in drying and heating and other hot air demand industry, is the ideal heating equipment of "coal changes electricity", with simple structure, easy industrialization, weather resistance is good, low-temperature operating performance is stable, heating delivery integrated etc.

Description

Technical Field

[0001] This utility model relates to an integrated hot air generating and conveying device, belonging to the technical field of hot air equipment. Background Technology

[0002] Drying energy consumption ranks second only to building materials energy consumption, accounting for 13% of the total national energy consumption, a figure much larger than the total energy consumption of all new energy sources combined. Currently, only in agriculture, animal husbandry, and fisheries, such as grain drying and hay drying, is "coal-to-electricity" conversion still limited by technological bottlenecks. The commonly used tower grain dryer requires hot air at 110-130℃ for corn drying, which traditional methods like air-source heat pumps cannot achieve. Numerous factors hinder technological progress in energy conservation, emission reduction, and environmental protection in the drying industry, including low energy efficiency, low temperature, high energy consumption, high cost, large investment, low cost-effectiveness, and poor equipment environmental adaptability.

[0003] Existing technologies such as CN108518858A (oscillating heating high-temperature hot air blower), CN109373621A (induction oscillating heating high-temperature hot air blower), CN118066704A (a high-frequency cavitation enhanced hot air device), and CN221299594U (an impeller guide mechanism for hot air blowers) have different heating structures, but their heating principle is the same: heat is generated through the friction, collision, compression, and convergence of air molecules. However, these technologies suffer from relatively complex structures, unstable hot air temperature output, low energy efficiency, and poor cost-effectiveness, resulting in overall technical performance deficiencies that hinder large-scale application.

[0004] From George Jones's twin-rotor blower in 1849 to the improvements made by the Roots brothers in 1854, the Roots blower has been widely used and promoted in various industries. In particular, the three-lobe Roots blower has been industrially used for over 150 years. However, during its application, it was discovered that the output air of the Roots blower exhibits a temperature rise. Most people have considered this phenomenon a negative technical problem and have not utilized this heating property for heating equipment applications. Furthermore, the optimal pressure for the Roots blower as a heating device is 0.8-1.1 kg; at 0.1-0.6 kg, this function is not apparent. In other words, air volume is inversely proportional to air pressure, while air pressure is directly proportional to heat production (temperature). Generally, the power of the blower in a drying production line is between 30% and 40% of the total power, meaning that air delivery alone accounts for 30%-40% of the energy consumption. Utility Model Content

[0005] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide an integrated heating and air delivery hot air device, which utilizes the phenomenon of generating internal heat in a certain air pressure range using a traditional Roots blower, and transforms it into an integrated heating and air delivery heating device.

[0006] The integrated hot air generating and conveying device of this utility model includes a housing, on which a gearbox water cooling system is installed for cooling the gearbox of the housing. A rotor assembly is rotatably arranged inside the housing. A variable frequency motor is provided on one side of the housing. The variable frequency motor is connected to the rotor assembly through the gearbox and can drive the rotor assembly to operate. The housing and the gearbox water cooling system are covered by a main unit enclosure, and the variable frequency motor is covered by a motor enclosure. The main unit enclosure and the motor enclosure are tightly connected, and the connecting partition is provided with ventilation holes. The main unit enclosure is provided with an air inlet A, and the motor enclosure is provided with an air inlet B.

[0007] The main unit enclosure is also equipped with a fresh air intake sleeve assembly, which is fixedly connected to the air intake pipe on the casing. The fresh air intake sleeve assembly is also connected to the internal areas of the main unit enclosure and the motor enclosure.

[0008] The technical solution of this utility model is to provide an integrated hot air generating and conveying device. A gearbox water cooling system is installed on the casing to recover the heat generated by the operation of the gearbox. At the same time, air inlets are set on the main unit enclosure and the motor enclosure. Through the suction effect of the rotor assembly, the mechanical friction heat in the main unit enclosure and the electromagnetic heat in the motor enclosure are recovered by using fresh air. Combined with the internal energy heat of the air generated by the operation of the rotor assembly, the three types of heat are collected and then uniformly delivered to the hot air user terminal.

[0009] Preferably, the gearbox water cooling system includes a water pump and a cooling coil, which are connected by pipes and communicate with the gearbox in the housing.

[0010] Preferably, the fresh air inlet sleeve assembly includes an outer tube and an inner tube. The outer tube is fixedly connected to the main unit enclosure and is sleeved outside the inner tube. The outer tube and the inner tube are connected by a circular fastener. The inner tube is connected to the air inlet pipe and a filter device is provided on the upper part of the inner tube.

[0011] Preferably, both the main unit enclosure and the motor enclosure are composite structures. The outer layer of the main unit enclosure is a metal shell A, and the inner layer is a heat-insulating and sound-absorbing layer A. A reinforcing keel A is installed at the corner of the main unit enclosure. The outer layer of the motor enclosure is a metal shell B, and the inner layer is a heat-insulating and sound-absorbing layer B. A reinforcing keel B is installed at the corner of the motor enclosure.

[0012] Preferably, air inlet A and air inlet B are equipped with air filter dustproof material.

[0013] Preferably, the housing is further provided with an air outlet pipe, on which an expansion joint, a pressure gauge and a pressure control solenoid valve are installed.

[0014] The advantages of this utility model compared with the prior art are:

[0015] The integrated heating and conveying hot air equipment described in this utility model can recover and collect the mechanical friction heat inside the main unit enclosure, the electromagnetic heat inside the motor enclosure, and the internal energy heat of the air generated by the rotor assembly, and then uniformly convey them to the hot air user terminal. It can be widely used in industries with hot air demand such as drying and HVAC, and is an ideal heating equipment for "coal-to-electricity" conversion. This utility model has the characteristics of simple structure, easy industrialization, good weather resistance, stable low-temperature operation performance, and integrated heating and conveying. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the working principle of this utility model;

[0017] Figure 2 This is a structural diagram of the main unit enclosure and the motor enclosure;

[0018] Figure 3 This is a schematic diagram of the gearbox water cooling system;

[0019] Figure 4 This is a structural diagram of the casing and rotor assembly;

[0020] Figure 5 This is a structural schematic diagram of the fresh air intake sleeve assembly.

[0021] In the diagram: 1. Rotor assembly; 2. Housing; 21. Inlet duct; 22. Outlet duct; 221. Pressure gauge; 222. Pressure control solenoid valve; 223. Expansion joint; 3. Air filter dustproof material; 4. Variable frequency motor; 5. Motor enclosure; 51. Metal shell B; 52. Reinforcing keel B; 53. Thermal insulation and sound absorption layer B; 54. Air inlet B; 6. Ventilation hole; 7. Fresh air inlet sleeve assembly; 71. Inner pipe; 72. Outer pipe; 73. Same-circle fastener; 74. Filter device; 8. Gearbox water cooling system; 81. Water pump; 82. Radiator coil; 9. Main unit enclosure; 91. Reinforcing keel A; 92. Metal shell A; 93. Thermal insulation and sound absorption layer A; 94. Air inlet A. Detailed Implementation

[0022] Example 1

[0023] like Figures 1-5As shown, this embodiment is achieved through the following technical solution: It includes a housing 2, on which a gearbox water-cooling system 8 is installed for cooling the gearbox of the housing 2. A rotor assembly 1 is rotatably mounted inside the housing 2. A variable frequency motor 4 is located on one side of the housing 2, and the variable frequency motor 4 is connected to the rotor assembly 1 via the gearbox, driving the rotor assembly 1 to rotate. A main unit enclosure 9 covers the housing 2 and the gearbox water-cooling system 8, and a motor enclosure 5 covers the variable frequency motor 4. The main unit enclosure 9 and the motor enclosure 5 are tightly connected, and ventilation holes 6 are provided on the connected partition. An air inlet A94 is provided on the main unit enclosure 9, and an air inlet B54 is provided on the motor enclosure 5.

[0024] The main unit enclosure 9 is also provided with a fresh air intake sleeve assembly 7, which is fixedly connected to the air intake pipe 21 on the casing. The fresh air intake sleeve assembly 7 is also connected to the internal area of ​​the main unit enclosure 9 and the motor enclosure 5.

[0025] In this embodiment, the gearbox water cooling system 8 includes a water pump 81 and a heat dissipation coil 82, which are connected by pipes and communicate with the gearbox of the housing 2. The heat dissipation coil 82 can be a coil made of metal with a high conductivity, such as aluminum or copper, or it can be a heat sink made of aluminum alloy. The water pump 81 can be a pipeline pump, and the cooling medium can be pure water or antifreeze.

[0026] The fresh air intake sleeve assembly 7 includes an outer pipe 72 and an inner pipe 71. The outer pipe 72 is fixedly connected to the main unit enclosure 9 and is sleeved outside the inner pipe 71. The outer pipe 72 and the inner pipe 71 are connected by a circular fastener 73. The inner pipe 71 is connected to the air intake pipe 21, and a filter device 74 is provided on the upper part of the inner pipe 71. The filter device 74 is an air filter.

[0027] Both the main unit enclosure 9 and the motor enclosure 5 are composite structures. The main unit enclosure 9 has an outer metal shell A92 and an inner heat-insulating and sound-absorbing layer A93. Reinforcing keels A91 are installed at the corners of the main unit enclosure 9. The motor enclosure 5 has an outer metal shell B51 and an inner heat-insulating and sound-absorbing layer B53. Reinforcing keels B52 are installed at the corners of the motor enclosure 5. The metal shells A92 and B51 are made of galvanized steel sheet with powder coating or stainless steel sheet. The reinforcing keels A91 and B52 are made of metal square tubing or angle steel. The heat-insulating and sound-absorbing layers A93 and B53 can be organic foam materials such as PU, XPS, EPS, etc., or aluminum silicate and glass wool, etc., providing both heat insulation and noise reduction. The main unit enclosure 9 and the motor enclosure 5 are mainly used for heat insulation to prevent the internal structure from dissipating heat to the external environment.

[0028] Air inlets A94 and B54 are fitted with air filter dustproof material 3. The housing 2 is also equipped with an air outlet duct 22, on which an expansion joint 223, a pressure gauge 221, and a pressure-controlling solenoid valve 222 are installed. The pressure-controlling solenoid valve 222 is mainly used to control the exhaust pressure. The magnitude of the exhaust pressure determines the temperature of the hot air; the exhaust pressure is directly proportional to the output hot air temperature and inversely proportional to the output hot air volume.

[0029] The heat energy generated by this invention consists of the following three components: internal air heat + mechanical friction heat + electromagnetic heat.

[0030] The generation of internal heat in air:

[0031] When air enters the rotating chamber of rotor assembly 1 through air inlet pipe 21, it is compressed, the gaps between air molecules shrink, and the distance between the internal electrons and the atomic nuclei inevitably decreases. The potential energy of the electrons is converted into the kinetic energy of the electrons through heat release, thereby reducing the internal energy of the molecules and heating the output air.

[0032] Recovery of mechanical frictional heat:

[0033] The mechanical friction heat generated by the gearbox operation of the casing 2 is transferred to the heat dissipation coil 82 by the gearbox water cooling system 8. At the same time, fresh air enters the main unit enclosure 9 through the air inlet A94, exchanges heat with the heat dissipation coil 82 to raise its temperature, and then enters the inner tube 71, which increases the temperature of the fresh air inlet.

[0034] Electromagnetic heat recovery:

[0035] Fresh air enters the motor enclosure 5 through the air inlet B54, carrying away the electromagnetic heating cable exhausted by the cooling fan of the variable frequency motor 4. It then passes through the ventilation hole 6 and enters the main unit enclosure 9, where it exchanges heat with the cooling coil 82 again to raise the temperature before entering the inner tube 71.

[0036] After the internal heat of the air, the heat from mechanical friction, and the heat from electromagnetic fields are collected, they are output through the air outlet duct 22 and delivered to the hot air user terminal.

[0037] Example 2

[0038] The main technical indicator for measuring the energy-saving performance of heating and cooling is the Coefficient of Performance (COP). The higher the COP, the better the energy-saving effect and the higher the application value.

[0039] The test machine for the integrated heating and conveying hot air equipment in this embodiment is 30kW, with an ambient temperature of -5℃, a hot air outlet diameter of 150mm, a set air pressure of 0.95kg, and an outlet temperature of 110℃ and an air velocity of 23m / s after 25 minutes of operation.

[0040] 1. Unit hot air volume: 0.075 × 0.075 × 3.14 × 23 × 3600 = 1462 m³ 3 / h;

[0041] 2. Air mass per hour: 1.29 kg / m³ 3 ×1462m 3 / h×1h=1886kg;

[0042] 3. Heat absorbed: Q=mcΔT, C=1.005kJ / kg·℃, ΔT=115℃, Q=1886×1.005×115=217859kJ;

[0043] 4. Energy conversion: 1 kWh = 3600 kJ, 217859 ÷ 3600 = 60 kWh;

[0044] 5. Energy efficiency ratio (COP): 60 ÷ 30 = 2.0.

[0045] Example 3

[0046] The prototype is 30kW. The ambient temperature in the workshop is 20℃. The hot air outlet is DN150mm. The set air pressure is 0.85kg. After 25 minutes of operation, the outlet temperature is 125℃ and the air velocity is 32m / s.

[0047] 1. Unit hot air volume: calculated to be 2034 m³ / h 3 / h;

[0048] 2. Mass of air per hour: 1.29 × 2034 = 2624 kg;

[0049] 3. Heat absorbed: Q=mcΔT=2624×1.005×105=276898kJ;

[0050] 4. Energy conversion: 76.9 kWh;

[0051] 5. Energy efficiency ratio (COP): 76.9 ÷ 30 = 2.56.

[0052] Comparison and explanation:

[0053] This utility model belongs to an integrated heating and conveying device, meaning it is both a heating device and a fan. Its competitive advantage is significant when applied to ordinary drying equipment.

[0054] In a typical dryer, the power of the fan (air supply) generally accounts for 30%-40% of the total power, which is equivalent to increasing the energy efficiency ratio (COP) by 0.3-0.4 and reducing equipment investment.

[0055] For example, the energy efficiency ratio COP in Example 2 above is equivalent to 2.3-2.4, and the energy efficiency ratio COP in Example 3 above is equivalent to 2.86-2.96.

Claims

1. A combined heating and conveying hot air device, characterized in that, The system includes a housing (2), on which a gearbox water cooling system (8) is installed. A rotor assembly (1) is rotatably installed inside the housing (2). A variable frequency motor (4) is provided on one side of the housing (2). The variable frequency motor (4) is connected to the rotor assembly (1) through a gearbox. The housing (2) and the gearbox water cooling system (8) are covered with a main unit enclosure (9). The variable frequency motor (4) is covered with a motor enclosure (5). The main unit enclosure (9) and the motor enclosure (5) are tightly connected, and ventilation holes (6) are provided on the connected partition. The main unit enclosure (9) is provided with an air inlet A (94), and the motor enclosure (5) is provided with an air inlet B (54). The main unit enclosure (9) is also provided with a fresh air inlet sleeve assembly (7), which is fixedly connected to the air inlet pipe (21) on the casing. The fresh air inlet sleeve assembly (7) is also connected to the internal area of ​​the main unit enclosure (9) and the motor enclosure (5).

2. The integrated hot air generating and conveying device according to claim 1, characterized in that, The gearbox water cooling system (8) includes a water pump (81) and a heat dissipation coil (82), which are connected by pipes and communicate with the gearbox of the housing (2).

3. The integrated hot air generating and conveying device according to claim 1, characterized in that, The fresh air inlet sleeve assembly (7) includes an outer tube (72) and an inner tube (71). The outer tube (72) is fixedly connected to the main unit enclosure (9). The outer tube (72) is sleeved outside the inner tube (71). The outer tube (72) and the inner tube (71) are connected by a circular fastener (73). The inner tube (71) is connected to the air inlet pipe (21). A filter device (74) is provided on the upper part of the inner tube (71).

4. The integrated hot air generating and conveying device according to claim 1, characterized in that, Both the main unit enclosure (9) and the motor enclosure (5) are composite structures. The outer layer of the main unit enclosure (9) is a metal shell A (92), and the inner layer is a heat-insulating and sound-absorbing layer A (93). A reinforcing keel A (91) is installed at the corner of the main unit enclosure (9). The outer layer of the motor enclosure (5) is a metal shell B (51), and the inner layer is a heat-insulating and sound-absorbing layer B (53). A reinforcing keel B (52) is installed at the corner of the motor enclosure (5).

5. The integrated hot air generating and conveying device according to claim 1, characterized in that, Air inlet A (94) and air inlet B (54) are equipped with air filter dustproof material (3).

6. The integrated hot air generating and conveying device according to claim 1, characterized in that, The housing (2) is also provided with an air outlet pipe (22), and an expansion joint (223), a pressure gauge (221) and a pressure control solenoid valve (222) are installed on the air outlet pipe (22).

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