Fresh air preheating device of solar air conditioner

Abstract

The utility model discloses a fresh air preheating device of a solar air conditioner, and relates to the technical field of fresh air systems. Comprising a fresh air system and a preheating device, the preheating device comprises a heating pipe, a first pipe cavity is formed in the heating pipe, the heating pipe is arranged on an air supply pipeline in a sleeving mode through the first pipe cavity, a plurality of metal electric heating pipes are evenly distributed on the outer surface of the heating pipe, a second pipe cavity is formed between a protective shell and the heating pipe, and a control box is arranged on the preheating device. The control box is electrically connected with the fresh air system, the multiple preheating devices are arranged on the air supply pipeline at intervals, the preheating devices are arranged on the basis of the length of the air supply pipeline, and the preheating devices heat the air supply pipeline and air located in the air supply pipeline through metal electric heating pipes, so that cold air entering a room is changed into hot air; while clean air is provided indoors, the indoor temperature is increased, the indoor comfort is improved, the use temperature of a heater and an air conditioner is reduced, and energy conservation and environmental protection are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh air systems, in particular to a solar air-conditioning fresh air preheating device. Background Art

[0002] The fresh air system is an air treatment system, generally composed of an air supply system and an exhaust system. Nowadays, with the improvement of living standards, people have higher and higher requirements for the quality of air in buildings. Therefore, fresh air systems are gradually entering more and more houses. At the same time, with the development of new energy and people's awareness of environmental protection and energy conservation, clean energy equipment is also used in conjunction with existing equipment, such as air conditioning fresh air systems that use solar energy.

[0003] The fresh air system can purify the air entering the room, but when the fresh air is circulated in cold or humid weather, it will have a greater impact on the indoor environment, easily making the indoor living environment cold or humid, and requiring additional air conditioning heating or dehumidification, especially in the winter in the north, which is not conducive to the use of the fresh air system. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a solar air-conditioning fresh air preheating device. By arranging a preheating device on the air supply duct of the fresh air system, the air delivered to the room is heated and dehumidified, which is beneficial to maintaining a comfortable indoor environment and improving the application scope of the fresh air system.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a solar air-conditioning fresh air preheating device, comprising a fresh air system and a preheating device, the preheating device is arranged on the air supply duct of the fresh air system, the preheating device comprises a heating tube, the heating tube is provided with a first tube cavity, the heating tube is sleeved on the air supply duct through the first tube cavity, a plurality of metal electric heating tubes are evenly arranged on the outer surface of the heating tube, a protective shell is provided on the outer side of the heating tube, a second tube cavity is provided between the protective shell and the heating tube, the metal electric heating tube is placed in the second tube cavity, a control box is provided on the preheating device, the control box is electrically connected to the fresh air system, and a plurality of preheating devices are arranged at intervals on the air supply duct.

[0006] The utility model is further configured as follows: the heating tube is made of aluminum alloy, a heating wire is arranged inside the metal electric heating tube, the metal electric heating tube is wound on the surface of the heating tube, the metal electric heating tube is electrically connected to the control box, a stainless steel heat reflecting plate is affixed to a side of the protective shell facing the metal electric heating tube, the protective shell is in a circular tube shape, the protective shell is sleeved on the outside of the heating tube, a sealing cover is provided at the opening between the protective shell and the heating tube, and the sealing cover is fixed by welding or bolts.

[0007] The utility model is further configured as follows: the metal electric heating tube is made of copper, the inner wall and the outer wall surface of the metal electric heating tube are coated with a magnesium oxide coating, the end portion of the metal electric heating tube is provided with a wire connector connected to a control box, the heating wire is connected to the part of the wire connector extending into the metal electric heating tube, and the control box is used to connect or disconnect the circuit with the metal electric heating tube.

[0008] The utility model is further configured as follows: the air supply duct is provided with at least two layers, including an inner aluminum-plastic tube and a thin-walled stainless steel tube sleeved on the aluminum-plastic tube; the heating tube is sleeved on the thin-walled stainless steel tube; the wall thickness of the thin-walled stainless steel tube is not greater than 3 mm; and a heat-conducting layer is also provided between the aluminum-plastic tube and the thin-walled stainless steel tube.

[0009] The utility model is further configured as follows: the heat-conducting layer is one of a graphite filling layer, a heat-conducting silica gel layer, and a magnesium coating layer; the thickness of the heat-conducting layer is 1-3 mm; and the heat-conducting layer is used to improve the heat-conducting effect of the air supply duct.

[0010] The utility model is further configured as follows: the fresh air system includes a fresh air fan, the fresh air fan is also provided with an air inlet pipe, the air inlet pipe is provided with an air inlet, the air inlet draws air from the outside into the fresh air fan, the air inlet pipe is communicated with the air supply duct, the fresh air system also includes a return air duct parallel to the air supply duct, the return air duct passes through the fresh air fan and then extends out of the building.

[0011] To sum up, the utility model has the following beneficial effects: one or more preheating devices are arranged based on the length of the air supply duct, and the preheating device heats the air supply duct and the air in the air supply duct through the metal electric heating tube, so that the cold air entering the room is changed into hot air. While providing clean air for the room, the indoor temperature is increased, the indoor comfort is improved, the operating temperature of heating and air conditioning is reduced, and it is beneficial to energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the preheating device of the utility model;

[0014] Figure 3 It is a cross-sectional view of the preheating device of the utility model;

[0015] Figure 4 This is a schematic diagram of the ventilation duct structure of the utility model.

[0016] In the figure: 1. Fresh air system; 11. Fresh air fan; 12. Air supply duct; 121. Thin-walled stainless steel pipe; 122. Heat conductive layer; 123. Aluminum-plastic pipe; 13. Return air duct; 14. Air inlet; 2. Preheating device; 21. Heating pipe; 22. Metal electric heating pipe; 23. Protective shell; 24. Second tube cavity; 25. Sealing cover; 3. Control box. DETAILED DESCRIPTION

[0017] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 - Figure 4 As shown, the utility model solar air conditioning fresh air preheating device comprises a fresh air system 1 and a preheating device 2. The fresh air system 1 is arranged in a building for indoor ventilation and providing clean air. The fresh air system 1 comprises an air supply duct 12. The preheating device 2 is installed on the air supply duct 12. The preheating device 2 heats the air supply duct 12 and the air flowing in the air supply duct 12 through the metal electric heating tube 22 on the heating tube 21. When in use, the fresh air fan 11 in the fresh air system 1 draws external air into the fresh air fan 11 through the air inlet 14 for purification. The purified clean air enters the air supply duct 12 communicated with the air inlet pipe. After the preheating device 2 is started, the heat generated is transferred to the clean air through the heating tube 21, the thin-walled stainless steel tube 121, the heat conductive layer 122, and the aluminum-plastic tube 123. After heating and dehumidifying, the clean air is sent to various places in the room. While sending the clean air, the temperature of the indoor environment is increased, which is conducive to maintaining a comfortable indoor environment. The return air duct 13 is used to draw the indoor air out to form a fresh air circulation.

[0019] Specifically, Figure 2 , Figure 3As shown, the preheating device 2 includes a heating tube 21, which is an aluminum alloy tube, which is conducive to heat conduction. The inner cavity of the heating tube 21 is a first tube cavity. The heating tube 21 is sleeved on the air supply duct 12 through the first tube cavity and fastened by bolts. A heating wire is arranged inside the metal electric heating tube 22 made of copper as its heat source. The inner wall and the outer wall of the metal electric heating tube 22 are coated with a magnesium oxide coating. The magnesium oxide coating has thermal conductivity and insulation effects, which improves the safety of the metal electric heating tube 22 when in use. The metal electric heating tube 22 is spirally wound on the outer surface of the heating tube 21, which is convenient for heating the heating tube 21 and increasing the heating area; a protective shell 23 is arranged on the periphery of the heating tube 21. The protective shell 23 is in the shape of a circular tube, and the inner diameter of the protective shell 23 is larger than the heating tube 21 with the metal electric heating tube 22. The diameter of the protective shell 23 is , when the protective shell 23 is sleeved on the heating tube 21, a second tube cavity 24 is formed between the inner wall of the protective shell 23 and the outer wall of the heating tube 21, and the metal electric heating tube 22 is located in the second tube cavity 24, that is, the metal electric heating tube 22 and the inner wall of the protective shell 23 have a certain interval, the inner wall of the protective shell 23 is made of a stainless steel heat reflecting plate, and the protective shell 23 is made of PP plastic with good heat insulation. The sealing cover 25 seals the opening between the protective shell 23 and the heating tube 21, and the sealing cover 25 is made of heat insulating material. The heat generated by the metal electric heating tube 22 diffuses in the second tube cavity 24, and the stainless steel heat reflecting plate blocks the diffused heat to reduce its dissipation to the outside, thereby playing a role of heat insulation and heat preservation. The air passing through here from the air supply duct 12 is heated, and then the air with heat is sent to various places in the room.

[0020] like Figure 4 As shown, the air supply duct 12 for conveying indoor air is provided with at least two layers, namely an inner aluminum-plastic tube 123 and an outer thin-walled stainless steel tube 121. The inner diameter of the thin-walled stainless steel tube 121 is larger than the diameter of the aluminum-plastic tube 123. The thin-walled stainless steel tube 121 is sleeved on the outside of the aluminum-plastic tube 123. A heat-conducting layer 122 is provided between the thin-walled stainless steel tube 121 and the aluminum-plastic tube 123. The heat-conducting layer 122 is a filling layer, which is filled with one of a graphite filling layer, a heat-conducting silicone layer, and a magnesium coating, specifically a heat-conducting silicone layer. The wall thickness of the thin-walled stainless steel tube 121 is 1 mm, and the thickness of the heat-conducting layer 122 is 3 mm. The heat-conducting layer 122 is used to improve the heat conduction effect of the conveying pipeline.

[0021] like Figure 1 , Figure 3 As shown, when in use, the control box 3 electrically connects the metal electric heating tube 22 to the fresh air fan 11, and the control box 3 can independently control its switch. When the weather is cold or humid, the preheating device 2 is turned on to heat and dehumidify the air in the air supply duct 12. When the weather is hot, the preheating device 2 can be turned off, thereby improving the scope of application and application scenarios.

[0022] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A solar air conditioning fresh air preheating device, comprising a fresh air system (1) and a preheating device (2), wherein the preheating device (2) is arranged on an air supply duct (12) of the fresh air system (1), and is characterized in that: The preheating device (2) comprises a heating tube (21), the heating tube (21) being provided with a first tube cavity, the heating tube (21) being sleeved on the air supply duct (12) through the first tube cavity, a plurality of metal electric heating tubes (22) being evenly arranged on the outer surface of the heating tube (21), a protective shell (23) being provided on the outer side of the heating tube (21), a second tube cavity (24) being provided between the protective shell (23) and the heating tube (21), the metal electric heating tube (22) being placed in the second tube cavity (24), a control box (3) being provided on the preheating device (2), the control box (3) being electrically connected to the fresh air system (1), and a plurality of the preheating devices (2) being arranged at intervals on the air supply duct (12).

2. The solar air conditioning fresh air preheating device according to claim 1 is characterized in that: The heating tube (21) is made of aluminum alloy. A heating wire is arranged inside the metal electric heating tube (22). The metal electric heating tube (22) is wound on the surface of the heating tube (21). The metal electric heating tube (22) is electrically connected to the control box (3). A stainless steel heat reflecting plate is attached to the side of the protective shell (23) facing the metal electric heating tube (22). The protective shell (23) is in the shape of a circular tube. The protective shell (23) is sleeved on the outside of the heating tube (21). A sealing cover (25) is provided at the opening between the protective shell (23) and the heating tube (21). The sealing cover (25) is fixed by welding or bolts.

3. The solar air conditioning fresh air preheating device according to claim 2 is characterized in that: The metal electric heating tube (22) is made of copper, and the inner wall and outer wall surfaces of the metal electric heating tube (22) are coated with a magnesium oxide coating. The end of the metal electric heating tube (22) is provided with a wire connector connected to the control box (3), and the heating wire is connected to the part of the wire connector extending into the metal electric heating tube (22). The control box (3) is used to connect or disconnect the circuit with the metal electric heating tube (22).

4. The solar air conditioning fresh air preheating device according to claim 1 is characterized in that: The air supply duct (12) is provided with at least two layers, comprising an inner aluminum-plastic tube (123) and a thin-walled stainless steel tube (121) sleeved on the aluminum-plastic tube (123); the heating tube (21) is sleeved on the thin-walled stainless steel tube (121); the wall thickness of the thin-walled stainless steel tube (121) is not greater than 3 mm; and a heat-conducting layer (122) is further provided between the aluminum-plastic tube (123) and the thin-walled stainless steel tube (121).

5. The solar air conditioning fresh air preheating device according to claim 4 is characterized in that: The heat-conducting layer (122) is one of a graphite filling layer, a heat-conducting silicone layer, and a magnesium coating layer; the thickness of the heat-conducting layer (122) is 1-3 mm; and the heat-conducting layer (122) is used to improve the heat-conducting effect of the air supply duct (12).

6. The solar air conditioning fresh air preheating device according to claim 1 is characterized in that: The fresh air system (1) comprises a fresh air fan (11), the fresh air fan (11) is also provided with an air inlet pipe, the air inlet pipe is provided with an air inlet port (14), the air inlet port (14) draws air from the outside into the fresh air fan (11), the air inlet pipe is communicated with the air supply pipe (12), the fresh air system (1) also comprises a return air pipe (13) parallel to the air supply pipe (12), the return air pipe (13) passes through the fresh air fan (11) and then extends outside the building.

Images