Flexible sealing device of air-air heat exchanger

Abstract

The utility model relates to a flexible sealing device of an air-air heat exchanger, and relates to the field of air-air heat exchangers. Two sets of sealing main frames are arranged and tightly attached to the first side and the second side of the air-air heat exchanger correspondingly, and the first side is opposite to the second side; two sets of sealing auxiliary supports are arranged and tightly attached to the third side and the fourth side of the air-air heat exchanger respectively, and the third side is opposite to the fourth side; wherein the two sides of the sealing main frames are each provided with a protruding part protruding out of the air-air heat exchanger, the attaching positions of the protruding parts and side metal plate strips of the air-air heat exchanger are bonded in a sealed mode through airtight rubber products, and the two sides of the sealing auxiliary support are in butt joint with the protruding parts of the two sets of sealing main frames respectively. Under the condition, the sealing performance of the air-air heat exchanger can be guaranteed, foul air leakage is avoided, installation is convenient, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-air heat exchangers, in particular to a flexible sealing device for an air-air heat exchanger. Background Art

[0002] Passive houses, also known as ultra-low energy houses, are truly ultra-low energy buildings. Due to their good insulation and sealing properties, the energy consumption for cooling and heating is very low. However, since indoor residents need ventilation, there is heat and moisture exchange and energy loss. In order to meet the cooling, heating and fresh air needs of passive houses, passive house energy and environmental units are currently used. Because they have multiple functions such as "cooling", "heating", "exhaust energy recovery" and "air purification", they are widely used in ultra-low energy buildings such as passive houses.

[0003] Air-to-air heat exchangers are primarily used in fresh air units requiring exhaust air energy recovery, particularly in applications with high energy consumption requirements. Passive house energy and environmental units are equipped with energy heat recovery modules, and air-to-air heat exchangers significantly impact energy heat recovery. Currently, air-to-air heat exchangers are primarily available in quadrilateral and hexagonal shapes (or special shapes, which are often specialized products). This utility model is specifically designed for quadrilateral air-to-air heat exchangers, as their four corners are secured using ┕-shaped sheet metal folding "wrappings." See [Note: The following appears to be unrelated and should likely be omitted.] Figure 1 To ensure a tight seal, both sides of the folded edge are aligned with the core of the air-to-air heat exchanger. The upper and lower sheet metal panels are fixed to the ┕-shaped folded edge with screws or rivets, forming a cube-like structure. When used in a passive house energy and environmental unit, the unit must be fixed to the core with a Y-shaped folded edge to ensure a tight seal. For ease of assembly, the following two methods are generally used:

[0004] Method 1: Please refer to Figure 2 , the form of clearance fit + sealing sponge strip, due to the large elasticity of the sponge, if the sheet metal of the enclosure structure is deformed, such a sealing structure is prone to leakage;

[0005] Method 2: Please refer to Figure 3 , in the form of interference fit + sealing sponge strip, that is, the enclosure structure sheet metal tightly presses the sponge strip on the air-air heat exchanger, but because the air-air heat exchanger adopts PP hollow sheet + thin sheet folding, the air-air heat exchanger will be deformed and damaged when the enclosure structure sheet metal is squeezed hard, which is more likely to cause leakage.

[0006] In summary, the above two sealing methods are not ideal, especially in passive houses with better sealing performance. The exhausted dirty air can easily mix with the fresh air, causing the indoor air quality to decline and indoor environmental pollution. In severe cases, it may even cause human discomfort and pose a safety hazard. Summary of the Invention

[0007] The purpose of the utility model is to provide a flexible sealing device for an air-to-air heat exchanger to solve the problems existing in the above-mentioned prior art.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] In a first aspect, the present application provides a flexible sealing device for an air-to-air heat exchanger, comprising:

[0010] Two sealing main frames are respectively attached to a first side and a second side of the air-to-air heat exchanger, wherein the first side is opposite to the second side;

[0011] Two sets of sealing auxiliary brackets, respectively clinging to a third side and a fourth side of the air-to-air heat exchanger, the third side being opposite to the fourth side;

[0012] Among them, both sides of the sealing main frame have raised parts protruding from the air-to-air heat exchanger, and the joints between the raised parts and the side sheet metal strips of the air-to-air heat exchanger are sealed and bonded by airtight adhesive products, and the two sides of the sealing auxiliary bracket are respectively docked with the two groups of raised parts of the sealing main frame.

[0013] In a possible implementation, the protrusion and the side sheet metal strip of the air-to-air heat exchanger are sealed and bonded at right angles using an airtight adhesive product, and both ends of the airtight adhesive product have margins.

[0014] In a possible implementation, the margins left at both ends of the airtight plastic product are greater than 3 mm.

[0015] In a possible implementation, the airtight adhesive product is a wide single-sided flexible airtight adhesive tape.

[0016] In a possible implementation, the wide single-sided flexible airtight tape is made of a silicon-based material.

[0017] In a possible implementation, the width of the wide single-sided flexible airtight tape is greater than 30 mm.

[0018] In a possible implementation, both sides of the sealing auxiliary bracket are connected to the raised portions of the sealing main frame via multiple groups of bolts.

[0019] In a second aspect, the present application provides a passive house energy environment unit, comprising a flexible sealing device of an air-to-air heat exchanger as described above, wherein the sealing main frame is fixed to the enclosure sheet metal of the passive house energy environment unit by multiple sets of screws.

[0020] The beneficial effects of the technical solution provided by the utility model include at least:

[0021] Two sets of main sealing frames are provided, each closely attached to the first and second sides of the air-to-air heat exchanger, with the first side facing the second side; and two sets of auxiliary sealing brackets are provided, each closely attached to the third and fourth sides of the air-to-air heat exchanger, with the third side facing the fourth side. Both sides of the main sealing frames have raised portions protruding from the air-to-air heat exchanger, and the raised portions are sealed to the side sheet metal strips of the air-to-air heat exchanger with an airtight adhesive. The two sides of the auxiliary sealing brackets are respectively connected to the raised portions of the two sets of main sealing frames. This ensures the sealing performance of the air-to-air heat exchanger, prevents leakage of foul air, facilitates installation, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0023] Figure 1 The figure shows the overall structure of the air-to-air heat exchanger provided by the prior art.

[0024] Figure 2 A schematic diagram of a sealing method for an air-to-air heat exchanger provided by the prior art is shown.

[0025] Figure 3 A schematic diagram of another sealing method for an air-to-air heat exchanger provided in the prior art is shown.

[0026] Figure 4 A schematic diagram showing the cooperation between a sealing main frame of a flexible sealing device of an air-to-air heat exchanger and an air-to-air heat exchanger provided by an exemplary embodiment of the present utility model is shown.

[0027] Figure 5 A schematic diagram of the cooperation between a flexible sealing device of an air-to-air heat exchanger and an air-to-air heat exchanger provided by an exemplary embodiment of the present utility model is shown.

[0028] Figure 6 A schematic structural diagram of a flexible sealing device for an air-to-air heat exchanger provided by an exemplary embodiment of the present utility model is shown.

[0029] Figure 7 A structural schematic diagram shows a flexible sealing device of an air-to-air heat exchanger provided by an exemplary embodiment of the present invention, which is installed in a passive house energy environment unit after being matched with the air-to-air heat exchanger.

[0030] In the figure: 1. Air-to-air heat exchanger; 2. Sealed main frame; 201. Raised portion; 3. Sealed auxiliary bracket; 4. Airtight rubber product; 5. Bolt; 6. Passive house energy and environmental unit. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the present utility model specification, and the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from specific parts, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model specification, the meaning of "multiple" is two or more.

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Please combine Figures 4 to 6 Come and see, Figure 4 A schematic diagram showing the cooperation between the sealing main frame of the flexible sealing device of the air-to-air heat exchanger and the air-to-air heat exchanger provided by an exemplary embodiment of the present utility model is shown. Figure 5 A schematic diagram showing the cooperation between the flexible sealing device of an air-to-air heat exchanger and the air-to-air heat exchanger provided by an exemplary embodiment of the present invention is shown. Figure 6 A schematic structural diagram of a flexible sealing device for an air-to-air heat exchanger provided by an exemplary embodiment of the present utility model is shown.

[0035] Specifically, the flexible sealing device for the air-to-air heat exchanger comprises two opposing main sealing frames 2 and two opposing auxiliary sealing brackets 3. The two main sealing frames 2 are respectively attached to the first and second sides of the air-to-air heat exchanger 1, while the two auxiliary sealing brackets 3 are respectively attached to the third and fourth sides of the air-to-air heat exchanger 1. Both sides of the main sealing frames 2 have raised portions 201 that protrude from the air-to-air heat exchanger 1. The raised portions 201 are sealed and bonded to the side sheet metal strips of the air-to-air heat exchanger 1 via an airtight adhesive 4. The two sides of the auxiliary sealing brackets 3 are respectively butted against the raised portions 201 of the two main sealing frames 2.

[0036] Furthermore, the protrusion 201 is sealed and bonded to the side sheet metal strip of the air-to-air heat exchanger 1 at right angles via the airtight adhesive 4, with margins at both ends of the airtight adhesive 4. Preferably, the margins at both ends of the airtight adhesive 4 are greater than 3 mm.

[0037] In some embodiments, the airtight adhesive product 4 is a wide, single-sided, flexible, airtight tape (cloth) made of a silicone-based material. Silicon-based materials have excellent high and low temperature resistance. Preferably, the width of the wide, single-sided, flexible, airtight tape (cloth) is greater than 30 mm.

[0038] Furthermore, both sides of the sealing auxiliary bracket 3 are connected to the raised portions 201 of the sealing main frame 2 through multiple groups of bolts 5 .

[0039] It can be understood that the present invention also provides a passive house energy environment unit, Figure 7 A schematic diagram illustrates the structure of a flexible sealing device for an air-to-air heat exchanger, provided by an exemplary embodiment of the present invention, installed within a passive house energy and environmental unit. The passive house energy and environmental unit includes the flexible sealing device for the air-to-air heat exchanger described above. The main sealing frame 2 is secured to the sheet metal enclosure of the passive house energy and environmental unit 6 via multiple sets of screws. Preferably, the outer perimeters of the main sealing frame 2 and the auxiliary sealing frame 3 are both wrapped and adhered with sealing sponge strips.

[0040] Next, the assembly principle of the flexible sealing device of the air-to-air heat exchanger involved in the embodiment of the present invention is described.

[0041] Place the two sealing main frames symmetrically on both sides of the air-to-air heat exchanger, and use the adhesive side of the tape to stick to the joints between the sheet metal strips on the air-to-air heat exchanger and the sealing main frames. Use auxiliary tools to stick the tape on and compact it (a total of 4 places). Use right angles to stick the tape here and leave a 3-5mm margin.

[0042] Install the two sealing auxiliary brackets between the two sealing main frames and close to the air-to-air heat exchanger, and fix them with screws. Since the sealing tape has a 3-5mm margin, even if there is position deviation or deformation of the sealing sheet metal during installation, the seal can be guaranteed to achieve a flexible zero-leakage sealing effect;

[0043] The outer periphery of the installed sealing main frame and the sealing auxiliary bracket of the sealing device are wrapped with sealing sponge strips, and the entire sealing device is placed in the passive house energy environment unit. The sealing device is fixed to the surrounding enclosure sheet metal in the passive house energy environment unit by screws, thereby achieving complete isolation of the fresh air and exhaust channels of the entire air-to-air heat exchanger and achieving a zero leakage effect.

[0044] In summary, the present application provides two sets of main sealing frames, each of which is in close contact with the first and second sides of the air-to-air heat exchanger, with the first side facing the second side; and two sets of auxiliary sealing brackets, each of which is in close contact with the third and fourth sides of the air-to-air heat exchanger, with the third side facing the fourth side. Both sides of the main sealing frames have raised portions protruding from the air-to-air heat exchanger, and the raised portions are sealed and bonded to the side sheet metal strips of the air-to-air heat exchanger using an airtight adhesive. The two sides of the auxiliary sealing brackets are respectively docked with the raised portions of the two sets of main sealing frames. In this manner, the sealing performance of the air-to-air heat exchanger can be ensured, leakage of foul air can be avoided, installation can be facilitated, and production efficiency can be improved.

[0045] In the embodiments disclosed in this utility model, the terms "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments disclosed in this utility model based on specific circumstances.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A flexible sealing device for an air-to-air heat exchanger, characterized in that: include: Sealing main frames (2), which are in two groups and are respectively closely attached to a first side and a second side of the air-air heat exchanger (1), wherein the first side is opposite to the second side; Sealing auxiliary brackets (3), which are in two groups and are respectively closely attached to the third side and the fourth side of the air-air heat exchanger (1), the third side being opposite to the fourth side; Wherein, both sides of the sealing main frame (2) have a protrusion (201) protruding from the air-air heat exchanger (1), and the protrusion (201) and the side sheet metal strip of the air-air heat exchanger (1) are sealed and bonded by an airtight adhesive product (4), and both sides of the sealing auxiliary bracket (3) are respectively connected to the two groups of protrusions (201) of the sealing main frame (2).

2. The flexible sealing device of the air-to-air heat exchanger according to claim 1, characterized in that: The joint between the raised portion (201) and the side sheet metal strip of the air-air heat exchanger (1) is sealed and bonded at right angles by an airtight adhesive product (4), and both ends of the airtight adhesive product (4) have margins.

3. The flexible sealing device of the air-to-air heat exchanger according to claim 2, characterized in that: The margins left at both ends of the airtight rubber product (4) are greater than 3 mm.

4. The flexible sealing device of an air-to-air heat exchanger according to claim 1, characterized in that: The airtight adhesive product (4) is a wide single-sided flexible airtight adhesive tape.

5. The flexible sealing device of the air-to-air heat exchanger according to claim 4, characterized in that: The wide single-sided flexible airtight tape is made of a silicon-based material.

6. The flexible sealing device of the air-to-air heat exchanger according to claim 4, characterized in that: The width of the wide single-sided flexible airtight tape is greater than 30 mm.

7. The flexible sealing device of an air-to-air heat exchanger according to claim 1, characterized in that: Both sides of the sealing auxiliary bracket (3) are connected to the raised portion (201) of the sealing main frame (2) via multiple groups of bolts (5).

8. A passive house energy environment unit, comprising the flexible sealing device of the air-to-air heat exchanger according to any one of claims 1 to 7, characterized in that: The sealed main frame (2) is fixed to the enclosure sheet metal of the passive house energy environment unit by means of multiple sets of screws.

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