Fixing structure for upper casing, lower casing and cover plate of EPP (Expanded Polypropylene) fresh air ventilator

Abstract

A fixing structure for an upper casing, a lower casing and cover plates of an EPP (expanded polypropylene) fresh air ventilator comprises a casing made of EPP foam materials, the casing comprises the upper casing and the lower casing which are connected through a connecting component, two ends of the casing are respectively provided with an air port, a heat exchange core is arranged in the casing, two sides of the heat exchange core are respectively provided with an air duct cover plate made of the EPP foam materials, and the air duct cover plates are connected with the upper casing and the lower casing. A fixing structure is arranged among the upper machine shell, the lower machine shell and the air duct cover plate and comprises a sleeve rod, the sleeve rod is inserted among the upper machine shell, the lower machine shell and the air duct cover plate in a penetrating mode, the upper end and the lower end of the sleeve rod abut against the inner wall of the upper machine shell and the inner wall of the lower machine shell respectively, and a long rod with screw holes in the two ends is arranged in the sleeve rod. Fixing holes are arranged on the upper casing and the lower casing corresponding to the screw holes, and screws penetrate through the fixing holes to be fastened with the screw holes. According to the scheme, the sleeve rod plays a role in positioning and supporting, and is fastened with the long rod through the screw, so that the whole machine is assembled tightly, and the heat exchange and ventilation efficiency of the machine is improved.

Description

Technical Field

[0001] The utility model relates to a fresh air exchanger, in particular to a fixing structure of an upper casing, a lower casing and a cover plate of an EPP fresh air machine, belonging to the field of ventilation equipment. Background Art

[0002] The fresh air exchanger is a ventilation device that replaces the air between indoor and outdoor. During the replacement process, the energy in the indoor air is recovered through the heat exchange core, and the fresh air outside is replaced into the room, reducing the replacement energy consumption, so as to achieve the purpose of energy saving and environmental protection. With the continuous development of the industry, the fresh air exchanger with a casing made of EPP foam material has been popular among people. The casing includes an upper casing and a lower casing, and the upper and lower casings are provided with components such as a heat exchange core, an air duct and a fan. Air outlets are provided at both ends of the upper and lower casings. The air duct is an integral cover plate made of EPP foam material, and a corresponding positioning part is provided in the lower casing. During assembly, the cover plate is first placed on the positioning part of the lower casing. After the assembly of other components is completed, the upper casing is installed, and then the upper casing and the lower casing are fixed by screws, that is, the cover plate has no specific fixing structure and is clamped and fixed by the upper casing and the lower casing. In actual use, due to the low mold molding dimensional accuracy of the EPP component itself and its own deformation, after a period of use, the cover will be lifted (warped), resulting in the upper and lower casings being unable to seal, thereby increasing the internal leakage of the product and affecting the heat exchange and ventilation efficiency. Summary of the invention

[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and to provide a fixing structure for the upper and lower casings and cover plates of an EPP fresh air fan which adopts sleeve rod insertion positioning and long rod screw fixing, which is convenient to connect, makes the upper and lower casings and cover plates seal reliably, and improves the heat exchange and ventilation efficiency.

[0004] The technical solution of the fixing structure of the upper and lower casings and cover plates of the utility model EPP fresh air fan is: it includes a casing made of EPP foam material, the casing includes an upper casing and a lower casing, the upper and lower casings are connected by a connecting component, air outlets are respectively arranged at both ends of the casing, a heat exchange core is arranged in the casing, and air duct cover plates made of EPP foam material are respectively arranged on both sides of the heat exchange core, a fixing structure is arranged between the upper casing, the lower casing and the air duct cover plates, and the fixing structure includes a set of rods, the sleeve rods are inserted between the upper casing, the lower casing and the air duct cover plates, and the upper and lower ends of the sleeve rods are respectively in contact with the inner walls of the upper casing and the lower casing, a long rod with screw holes at both ends is arranged in the sleeve rod, fixing holes are arranged on the upper casing and the lower casing corresponding to the screw holes, and screws pass through the fixing holes and are fastened to the screw holes.

[0005] The fixing structure of the upper and lower casings and cover plates of the EPP fresh air fan of the utility model is mainly characterized by inserting a sleeve rod between the upper casing, the lower casing and the air duct cover plate, and the upper and lower ends of the sleeve rod respectively contact the inner walls of the upper casing and the lower casing, which is equivalent to a support rod, which plays a positioning role to position the air duct cover plate, and also plays a supporting role to support the upper casing and the lower casing, which is particularly suitable for super-long models. At the same time, a long rod with screw holes at the upper and lower ends is set in the sleeve rod, and is fastened to the upper casing and the lower casing by screws, which is convenient and reliable to connect, so that the upper casing, the lower casing and the air duct cover plate are tightly assembled, reducing the leakage air volume inside the product, and improving the heat exchange and ventilation efficiency of the machine.

[0006] The utility model has a fixing structure for the upper and lower casings and the cover plate of the EPP fresh air fan. The air duct cover plate is provided with a perforation, and the sleeve rod passes through the perforation, which is convenient for insertion. The connecting assembly includes a connecting rod, which is arranged between the upper casing and the lower casing. The upper and lower ends are respectively connected to the upper casing and the lower casing by screws, and the connection is firm and convenient. There are 6 groups of connecting assemblies, which are respectively arranged at the four corners of the upper casing and the lower casing, and on the front and rear sides. Multiple groups of connecting assemblies are evenly distributed between the upper casing and the lower casing, so that the upper casing and the lower casing are tightly connected, do not warp, and have good sealing. The sleeve rod is a plastic sleeve rod, which is easy to process, and the long rod is a metal long rod with good strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the fixing structure of the upper and lower casings and the cover plate of the EPP fresh air fan of the utility model;

[0008] Figure 2 yes Figure 1 A local enlarged schematic diagram of point A;

[0009] Figure 3 It is a schematic diagram of the connection assembly of the utility model;

[0010] Figure 4 It is a three-dimensional schematic diagram of the EPP fresh air fan of the utility model. DETAILED DESCRIPTION

[0011] The utility model relates to a fixing structure of an upper and lower casing and a cover plate of an EPP fresh air fan, such as Figure 1 — Figure 4As shown, it includes a casing made of EPP foam material, the casing includes an upper casing 1 and a lower casing 2, the upper and lower casings are connected by a connecting component, air outlets 3 are respectively arranged at both ends of the casing, a heat exchange core 5 is arranged in the casing, and air duct covers 6 made of EPP foam material are respectively arranged on both sides of the heat exchange core, a fixing structure is arranged between the upper casing 1, the lower casing 2 and the air duct cover 6, and the fixing structure includes a set of rods 7, the sleeve rod 7 is inserted between the upper casing 1, the lower casing 2 and the air duct cover 6, and the upper and lower ends of the sleeve rod are respectively in contact with the inner walls of the upper casing and the lower casing, a long rod 8 with screw holes at both ends is arranged in the sleeve rod 7, and fixing holes 9 are arranged on the upper casing and the lower casing corresponding to the screw holes, and screws 10 pass through the fixing holes 9 to be fastened with the screw holes. The main feature of this scheme is that a sleeve rod 7 is inserted between the upper housing 1, the lower housing 2 and the air duct cover plate 6, and the upper and lower ends of the sleeve rod are respectively against the inner walls of the upper housing and the lower housing, which is equivalent to a support rod, which not only plays a positioning role, positioning the air duct cover plate 6, but also plays a supporting role, supporting the upper housing and the lower housing, which is particularly suitable for super-long models. At the same time, a long rod 8 with screw holes at the upper and lower ends is set in the sleeve rod 7, and is fastened with the upper housing 1 and the lower housing 2 by screws 10, which is convenient and reliable to connect, so that the upper housing 1, the lower housing 2 and the air duct cover plate are tightly assembled, reducing the leakage air volume inside the product, and improving the heat exchange and ventilation efficiency of the machine. The air duct cover plate 6 is provided with a perforation 11, and the sleeve rod 7 passes through the perforation 11, which is convenient to insert. The connecting assembly includes a connecting rod 12, which is set between the upper housing 1 and the lower housing 2, and the upper and lower ends are respectively connected to the upper housing and the lower housing by screws 13, which is reliable and convenient to connect. There are 6 groups of connection components, which are respectively arranged at the four corners of the upper casing and the lower casing, and on the front and rear sides. Multiple groups of connection components are evenly arranged between the upper casing and the lower casing, so that the upper casing and the lower casing are tightly connected, do not warp, and have good sealing. The sleeve rod 7 is a plastic sleeve rod, which is easy to process, and the long rod 8 is a metal long rod with good strength.

Claims

1. A fixing structure for upper and lower casings and cover plates of an EPP fresh air fan, comprising a casing made of an EPP foam material, the casing comprising an upper casing (1) and a lower casing (2), the upper and lower casings being connected by a connecting component, air outlets (3) being arranged at both ends of the casing, a heat exchange core (5) being arranged in the casing, and air duct cover plates (6) made of an EPP foam material being arranged on both sides of the heat exchange core, characterized in that: A fixing structure is arranged between the upper housing (1), the lower housing (2) and the air duct cover plate (6), the fixing structure comprising a set of rods (7), the set of rods (7) being inserted between the upper housing (1), the lower housing (2) and the air duct cover plate (6), and the upper and lower ends of the set of rods respectively contact the inner walls of the upper housing and the lower housing, a long rod (8) with screw holes at both ends is arranged in the set of rods (7), fixing holes (9) are arranged on the upper housing and the lower housing corresponding to the screw holes, and screws (10) pass through the fixing holes (9) and are fastened to the screw holes.

2. The fixing structure of the upper and lower casings and the cover plate of the EPP fresh air fan according to claim 1 is characterized in that The air duct cover plate (6) is provided with a through hole (11), and the sleeve rod (7) passes through the through hole (11).

3. The fixing structure of the upper and lower casings and the cover plate of the EPP fresh air fan as claimed in claim 1 is characterized in that The connecting assembly comprises a connecting rod (12), which is arranged between the upper housing (1) and the lower housing (2), and the upper and lower ends of the connecting rod (12) are respectively connected to the upper housing and the lower housing by screws (13).

4. The fixing structure of the upper and lower casings and the cover plate of the EPP fresh air fan as claimed in claim 1 is characterized in that There are 6 groups of connection components, which are respectively arranged at the four corners of the upper shell and the lower shell, and on the front and rear sides.

5. The fixing structure of the upper and lower casings and the cover plate of the EPP fresh air fan according to claim 1 is characterized in that The sleeve rod (7) is a plastic sleeve rod, and the long rod (8) is a metal long rod.

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