Cold bridge prevention window

Abstract

The utility model relates to the technical field of combined air handling units, in particular to an anti-cold-bridge window which is arranged on a sandwich door plate, the sandwich door plate comprises two door plates with door openings, the anti-cold-bridge window comprises a connector, a sealing ring plate and two window assemblies, the two window assemblies are respectively arranged on the door openings of the two door plates through the connector, and the sealing ring plate is arranged on the door openings of the two door plates. The sealing ring plate is arranged on the connecting body or clamped between the connecting body and the two window assemblies. According to the anti-cold-bridge window, the two window assemblies are not connected through a high-heat-conduction part, and the anti-cold-bridge window has the advantage of preventing cold bridges.

Description

TECHNICAL FIELD

[0001] The utility model relates to combined air handling unit technical field, concretely relates to a kind of cold bridge prevention window. BACKGROUND

[0002] Combined air handling unit is a kind of equipment with the performance of air purification, temperature, humidity etc., usually by wind section, filter section, heating section, refrigeration section, humidification section, fan motor section and the multiple function sections such as diffusion section are combined into. Since the unit belongs to large unit, each function needs regular cleaning, filter screen replacement and other maintenance work, so each function section is provided with door plate.

[0003] Since there is temperature difference inside and outside the cabinet during the operation of air handling unit, the door on air handling unit usually adopts sandwich structure door plate, and the door plate has cold bridge prevention performance. The door plate is usually provided with window to facilitate the observation of the internal operation state of air handling unit. But the existing window is not designed with cold bridge prevention structure, and cannot be applied to the door plate with cold bridge prevention performance. If forcibly set, the overall cold bridge prevention measures, waterproof performance and sealing performance of the door plate are affected, and ultimately directly affect the energy consumption level and later use cost of the whole equipment. Therefore, a cold bridge prevention window is needed to solve the above problems. SUMMARY

[0004] In order to solve the technical problem that the existing window is not designed with cold bridge prevention structure, the utility model provides a cold bridge prevention window, two window assemblies are not connected by high-thermal-conductivity components (such as metal components), and the connecting body is a non-metal material, which has cold bridge prevention characteristics.

[0005] The utility model provides a cold bridge prevention window, which is arranged on a sandwich door plate. The sandwich door plate includes two door plates each having a door hole. The cold bridge prevention window includes a connecting body, a sealing ring plate and two window assemblies. The two window assemblies are arranged on the door holes of the two door plates by the connecting body. The sealing ring plate is arranged on the connecting body or between the connecting body and the two window assemblies.

[0006] Further, the connecting body includes two annular trays fixedly connected. The two window assemblies are arranged on the door holes of the two door plates by the two annular trays. The sealing ring plate is arranged on the two annular trays or between the two annular trays and the window assemblies. The two window assemblies are respectively located on the outer sides of the two door plates. The sealing ring plate and the two annular trays are located between the two door plates. The connecting body is assembled by the two annular trays, which further facilitates the installation of the two window assemblies on the door holes of the two door plates.

[0007] Further, the two annular trays are oppositely arranged, and a plurality of fixing columns are uniformly arranged on each of the annular trays, and two fixing columns oppositely arranged on the two annular trays are fixedly connected through a sleeve; each of the window assemblies comprises an annular window gland, an annular sealing retainer and a main window, the annular sealing retainer is pressed on the outer side of the door plate by the annular window gland, and the annular window gland is fixedly connected with the annular tray located on the inner side of the door plate, and the main window is pressed on the annular sealing retainer by the annular window gland; the sealing ring plate is arranged on the two annular trays or is clamped between the two annular trays and the annular sealing retainers. After the two annular trays are fixedly connected through the plurality of fixing columns, the annular window gland is fixedly connected with the annular tray located on the inner side of the door plate and presses the annular sealing retainer on the outer side of the door plate, and the annular window gland also presses the main window on the annular sealing retainer.

[0008] Further, the two annular trays are oppositely arranged, and a plurality of fixing columns are uniformly arranged on each of the annular trays, and two fixing columns oppositely arranged on the two annular trays are fixedly connected through a sleeve; each of the window assemblies comprises an annular window gland, an annular sealing retainer and a main window, the annular sealing retainer is pressed on the outer side of the door plate by the annular window gland, and the annular window gland is fixedly connected with the annular tray located on the inner side of the door plate, and the main window is pressed on the annular sealing retainer by the annular window gland; the sealing ring plate is arranged on the two annular trays or is clamped between the two annular trays and the annular sealing retainers. After the two annular trays are fixedly connected through the plurality of fixing columns, the annular window gland is fixedly connected with the annular tray located on the inner side of the door plate and presses the annular sealing retainer on the outer side of the door plate, and the annular window gland also presses the main window on the annular sealing retainer.

[0009] Further, the two annular trays are oppositely arranged, and a plurality of fixing columns are uniformly arranged on each of the annular trays, and two fixing columns oppositely arranged on the two annular trays are fixedly connected through a sleeve; each of the window assemblies comprises an annular window gland, an annular sealing retainer and a main window, the annular sealing retainer is pressed on the outer side of the door plate by the annular window gland, and the annular window gland is fixedly connected with the annular tray located on the inner side of the door plate, and the main window is pressed on the annular sealing retainer by the annular window gland; the sealing ring plate is arranged on the two annular trays or is clamped between the two annular trays and the annular sealing retainers. After the two annular trays are fixedly connected through the plurality of fixing columns, the annular window gland is fixedly connected with the annular tray located on the inner side of the door plate and presses the annular sealing retainer on the outer side of the door plate, and the annular window gland also presses the main window on the annular sealing retainer.

[0010] Further, each of the fixing columns is in a convex structure, and two fixing columns oppositely arranged on the two annular trays are clamped into two ends of the sleeve, respectively. The fixing column is in a structure of wide at the top and narrow at the bottom, and the narrow end of the fixing column is clamped into the sleeve.

[0011] Further, a plurality of door holes are uniformly arranged on each of the door plates and are arranged in a ring shape with the door opening as the center, a plurality of through holes are uniformly arranged on the positions corresponding to the door holes on each of the annular window glands and the annular sealing retainers, a plurality of screw grooves are uniformly arranged on the positions corresponding to the door holes on each of the annular trays, and the through holes on the annular window glands, the through holes on the annular sealing retainers, the door holes and the screw grooves are fixedly connected through screws. The screws connect the through holes on the annular window glands, the through holes on the annular sealing retainers, the door holes and the screw grooves, so as to fix the annular trays on the door plates, fix the main windows on the annular sealing retainers and cover the door opening with the main windows.

[0012] Further, the center of each ring-shaped sealing retainer is provided with a sunken groove, the lower surface of each main window is provided with a third ring groove, each third ring groove is clamped on the sunken groove, the lower surface of each ring-shaped window gland is provided with a first ring groove and a second ring groove, each first ring groove is located on the outer side of the ring-shaped sealing retainer, and each first ring groove and the outer side of the ring-shaped sealing retainer are provided with a through hole, and each second ring groove is located on the upper surface of the main window.

[0013] Further, the center of each ring-shaped sealing retainer is provided with a sunken groove, the lower surface of each main window is provided with a third ring groove, each third ring groove is clamped on the sunken groove, the lower surface of each ring-shaped window gland is provided with a first ring groove and a second ring groove, each first ring groove is located on the outer side of the ring-shaped sealing retainer, and each first ring groove and the outer side of the ring-shaped sealing retainer are provided with a through hole, and each second ring groove is located on the upper surface of the main window.

[0014] Further, each ring-shaped tray comprises a ring plate and a plurality of outer expansion plates uniformly arranged on the ring plate in the circumferential direction of the ring plate, the ring plate is sequentially provided with an inner embedding groove and a slot from inside to outside, the top of the fixed column is fixed to the bottom of the outer expansion plate, and screw grooves are formed in the outer expansion plate and the fixed column. The ring-shaped tray is integrally formed.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] The structure of the cold bridge prevention window is simple, two window assemblies are arranged on the door holes of two door plates through the connecting body, the sealing ring plate is arranged on the connecting body or clamped between the connecting body and the two window assemblies, there is no high-thermal-conductivity component (for example, a metal component) connected between the two window assemblies, and the connecting body is of non-metal material, so that the cold bridge prevention characteristic is achieved, the overall cold bridge prevention measure, waterproof performance and sealing performance of the sandwich door plate are met, and the energy consumption level of the whole equipment and the later use cost are finally reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structure schematic view of a cold bridge prevention window of the utility model embodiment one;

[0018] Figure 2 is a sectional structure schematic view of the cold bridge prevention window of the utility model embodiment one;

[0019] Figure 3 is an explosion structure schematic view of the cold bridge prevention window of the utility model embodiment one;

[0020] Figure 4 is a structure schematic view of a ring-shaped tray of the utility model embodiment one;

[0021] Figure 5 is a structure schematic view of a ring-shaped sealing retainer of the utility model embodiment one;

[0022] Figure 6 is a sectional structure schematic view of a cold bridge prevention window according to the embodiment two of the present application;

[0023] The reference signs in the drawings are as follows:

[0024] 1, sandwich door panel; 11, door panel; 111, door hole; 2, connecting body; 21, annular tray; 211, inlaid groove; 212, slotted; 213, screw groove; 214, fixed column; 3, sealing ring plate; 4, window assembly; 41, annular window gland; 411, first ring groove; 412, second ring groove; 42, annular sealing block ring; 421, sunken groove; 43, main window; 431, third ring groove; 5, sleeve; 6, screw. DETAILED DESCRIPTION

[0025] The present application will be further described below in combination with the drawings and specific embodiments.

[0026] As Figures 1-5 shown, the embodiment one, a cold bridge prevention window is arranged on the sandwich door panel 1, the sandwich door panel 1 includes two door panels 11 each having a door hole, the sandwich door panel 1 has a cold bridge prevention performance, the cold bridge prevention window includes a connecting body 2, a sealing ring plate 3 and two window assemblies 4, the two window assemblies 4 are arranged on the door holes of the two door panels 11 respectively through the connecting body 2, and the sealing ring plate 3 is arranged on the connecting body 2.

[0027] The cold bridge prevention window of the embodiment has a simple structure, the two window assemblies 4 are arranged on the door holes of the two door panels 11 through the connecting body 2, the sealing ring plate 3 is arranged on the connecting body 2, there is no high-thermal-conductivity component (for example, a metal component) connected between the two window assemblies 4, and the connecting body 2 is a non-metal material, has a cold bridge prevention feature, meets the overall cold bridge prevention measures, waterproof performance and sealing performance of the sandwich door panel 1, and finally reduces the energy consumption level of the whole equipment and the later use cost. The internal running state of the air handling unit provided with the above-mentioned sandwich door panel 1 can be observed through the sealing area surrounded by the sealing ring plate 3 and the two window assemblies 4.

[0028] As an implementable manner, the connecting body 2 includes two annular trays 21 fixedly connected, the two window assemblies 4 are arranged on the door holes of the two door panels 11 respectively through the two annular trays 21, the sealing ring plate 3 is arranged on the two annular trays 21, the two window assemblies 4 are respectively located on the outer sides of the two door panels 11, and the sealing ring plate 3 and the two annular trays 21 are located between the two door panels 11. The connecting body 2 is assembled by the two annular trays 21, and the two window assemblies 4 are further conveniently installed on the door holes of the two door panels 11.

[0029] As an implementable manner, two said annular trays 21 are oppositely arranged, a plurality of fixing columns 214 are uniformly arranged on each said annular tray 21, and two opposite fixing columns 214 on the two said annular trays 21 are fixedly connected through a sleeve 5; each said window assembly 4 comprises an annular window gland 41, an annular sealing retainer ring 42, and a main window 43, each said annular window gland 41 presses the annular sealing retainer ring 42 on the outer side of the door panel 11 and is fixedly connected with the annular tray 21 on the inner side of the door panel 11, and each said annular window gland 41 presses the main window 43 on the annular sealing retainer ring 42; the sealing ring plate 3 is arranged on the two annular trays 21. Among them, the annular tray 21 is made of polycarbonate, which has the advantages of high strength, high temperature resistance, low temperature resistance, and high light transmittance; the sleeve 5 and the sealing ring plate 3 are made of PVC (polyvinyl chloride); the annular sealing retainer ring 42 is made of silica gel.

[0030] The assembly process of the cold-bridge-proof window is as follows: after the two annular trays 21 are fixedly connected through the plurality of fixing columns 214, the annular window gland 41 is fixedly connected with the annular tray 21 on the inner side of the door panel 11 and presses the annular sealing retainer ring 42 on the outer side of the door panel 11, and at the same time, the annular window gland 41 also presses the main window 43 on the annular sealing retainer ring 42. Among them, the sealing area is surrounded between the sealing ring plate 3, the two main windows 43, and the annular sealing retainer ring 42, and the human eye can observe the internal running state of the air handling unit provided with the above-mentioned sandwich door panel 1 through the sealing area. The arrangement of the annular sealing retainer ring 42 makes the sealing property of the sealing area better.

[0031] The cold-bridge-proof window of the embodiment has a simple structure, the two main windows 43 are arranged on the door holes of the two door panels 11 through the two annular trays 21, the sealing ring plate 3 is arranged on the two annular trays 21, and the two main windows 43 are not connected by high-thermal-conductivity components (such as metal components), which has the cold-bridge-proof feature.

[0032] As an implementable manner, the two opposite end faces of the two said annular trays 21 are provided with an embedded groove 211, and the two ends of the said sealing ring plate 3 are respectively clamped into the two embedded grooves 211. When the cold-bridge-proof window of the embodiment is installed on the two door panels 11 of the sandwich door panel 1, PU foam (hard foam) is filled in the two door panels 11 of the sandwich door panel 1, and after the PU foam is filled, it has a pressure pressing towards the sealing ring plate 3. After the two ends of the sealing ring plate 3 are respectively clamped into the two embedded grooves 211, the embedded grooves 211 can effectively fix the sealing ring plate 3.

[0033] As an implementable manner, each said fixing column 214 is in a convex structure, and two opposite fixing columns 214 on the two said annular trays 21 are respectively clamped into the two ends of the sleeve 5. The fixing column 214 is in a structure of wide at the top and narrow at the bottom, and the narrow end of the fixing column 214 is clamped into the sleeve 5. The lengths of the narrow ends of the two fixing columns 214 are equal to the length of the sleeve 5.

[0034] The cold-bridge preventing window of the embodiment can be installed on different sandwich door panels 1, the widths between the two door panels 11 of the different sandwich door panels 1 are different. The length of the sleeve 5 and the length of the sealing ring plate 3 can be adjusted to meet the installation. The length of the sleeve 5 is changed, and the length of the sealing ring plate 3 is also changed correspondingly, and then the sleeve 5 is assembled with the two annular trays 21 and the window assembly 4. The narrow end of the fixed column 214 is still clamped into the sleeve 5, and the length of the narrow end of the two fixed columns 214 is less than the length of the sleeve 5.

[0035] As an implementable manner, a plurality of door holes 111 are uniformly arranged on each door panel 11, and the plurality of door holes 111 are arranged in a ring shape around the door opening. A plurality of through holes are uniformly arranged on the corresponding positions of each annular window gland 41 and annular sealing retainer ring 42 corresponding to the door hole 111. A plurality of screw grooves 213 are uniformly arranged on the corresponding positions of each annular tray 21 corresponding to the door hole 111. The through holes on the annular window gland 41, the through holes on the annular sealing retainer ring 42, the door hole 111, and the screw groove 213 are fixedly connected by the screw 6. The screw 6 connects the through holes on the annular window gland 41, the through holes on the annular sealing retainer ring 42, the door hole 111, and the screw groove 213, thereby realizing the fixation of the annular tray 21 on the door panel 11, the fixation of the main window 43 on the annular sealing retainer ring 42, and the covering of the main window 43 on the door opening. Further, each annular sealing retainer ring 42 is clamped on the outer side of the door opening of the door panel 11. A sunken groove 421 is arranged at the center position of each annular sealing retainer ring 42. A third ring groove 431 is arranged on the lower surface of each main window 43. Each third ring groove 431 is clamped on the sunken groove 421. A first ring groove 411 and a second ring groove 412 are arranged on the lower surface of each annular window gland 41. Each first ring groove 411 is located on the outer side of the annular sealing retainer ring 42. A through hole is arranged on the outer side of each first ring groove 411 and the annular sealing retainer ring 42. Each second ring groove 412 is located on the upper surface of the main window 43. Referring to Figure 3 , when the door panel 11, the annular tray 21, the annular window gland 41, the annular sealing retainer ring 42, and the main window 43 are assembled, the sunken groove 421 of the annular sealing retainer ring 42, the third ring groove 431 of the main window 43, and the first ring groove 411 and the second ring groove 412 of the annular window gland 41 can further stably connect them.

[0036] As an implementable manner, an arc-shaped protrusion is arranged at the middle part of each main window 43. The main window 43 is made of PC material, which has the advantage of high light transmission. The arc-shaped protrusion arranged at the middle part of the main window 43 can effectively resist the wind pressure generated by the operation of the fan inside the air handling unit, and has the advantage of not being easily broken compared to the window made of glass.

[0037] As an implementation manner, each of the annular trays 21 comprises an annular plate and a plurality of expansion plates uniformly arranged on the annular plate in the circumferential direction of the annular plate, the annular plate is sequentially provided with an inner groove 211 and a slot 212 from inside to outside, the top of the fixed column 214 is fixed to the bottom of the expansion plate, the expansion plate and the fixed column 214 are provided with screw grooves 213, and the screw grooves 213 and the fixed column 214 are coaxially arranged. Wherein, the annular tray 21 is integrally formed.

[0038] As an implementation manner, the sealing ring plate 3 is provided with an air hole, and a one-way valve is arranged on the air hole. When the temperature difference between the inside and outside of the air handling unit is too large, the one-way valve is opened and connected to an external air extraction device, so that the sealing area can be vacuumized, the heat conduction efficiency of the cold-bridge prevention window can be reduced, and dew condensation on the main window 43 can be avoided.

[0039] The assembly process of the cold-bridge prevention window of the embodiment is as follows: one of the door plates 11 is first laid flat, the door plate 11 is pre-formed with a door hole and a plurality of door holes 111 (8 door holes 111 are provided in the embodiment), one of the annular trays 21 is first installed, the annular tray 21 is correspondingly provided with eight screw grooves 213, the screw grooves 213 are aligned with the door holes 111 on the door plate 11, and one end of the sealing ring plate 3 is clamped into the inner groove 211 of the annular tray 21; then the other annular tray 21 is reversely buckled on the other end of the sealing ring plate 3, and the two fixed columns 214 on the two annular trays 21 are fixedly connected through the sleeve 5, and the two annular trays 21 are fixedly connected; the two door plates 11 are temporarily fixed by adhesive tape to prevent separation, the two door plates 11 and the annular trays 21 are installed in a mold, and PU foam (hard foam) is injected between the two door plates 11, and after the PU foam is solidified, the two door plates 11, the annular trays 21 and the sealing ring plate 3 are bonded as a whole.

[0040] The screw 6 connects the through hole on the annular window gland 41, the through hole on the annular sealing retainer ring 42, the door hole 111 and the screw groove 213, the two annular trays 21 are fixed on the two door plates 11, the two main windows 43 are respectively fixed at the two door holes, and the temporary adhesive tape on the two door plates 11 can be removed.

[0041] As Figure 6As shown in the embodiment two, different from the embodiment one, the sealing ring plate 3 is arranged between the connecting body 2 and the two window assemblies 4, that is, the sealing ring plate 3 is clamped between the connecting body 2 and the two window assemblies 4. Specifically, the sealing ring plate 3 is arranged between the two annular trays 21 and the window assemblies 4; the sealing ring plate 3 is arranged between the two annular trays 21 and the annular sealing retaining rings 42, the two annular trays 21 are each provided with a slot 212, two ends of the sealing ring plate 3 are located at the two slots 212, and each annular sealing retaining ring 42 is provided with a protrusion downwardly and obliquely on the inner side, each protrusion abuts the sealing ring plate 3 against the slot 212. When the cold-bridge-preventing window of the embodiment is mounted on the two door plates 11 of the sandwich door plate 1, and the two door plates 11 of the sandwich door plate 1 are filled with rock wool boards, the rock wool boards do not press the sealing ring plate 3, so that the protrusions can abut the sealing ring plate 3 against the slots 212.

[0042] The cold-bridge-preventing window of the embodiment has a simple structure, the two window assemblies 4 are arranged on the door holes of the two door plates 11 through the connecting body 2, the sealing ring plate 3 is arranged on the connecting body 2, there is no high-thermal-conductivity component (for example, a metal component) connected between the two window assemblies 4, and the connecting body 2 is a non-metal material, so that the cold-bridge-preventing window has the cold-bridge-preventing feature.

[0043] The above-described embodiments are only preferred embodiments of the present application, and are used to explain the present application, but not to limit the application scope. For those skilled in the art, other embodiments can be easily obtained by replacing or changing the disclosed technical contents in the specification, so that any changes and improvements made on the basis of the principles and technical conditions of the present application should be included in the application patent scope.

Claims

1. A cold-bridge preventing window provided on a sandwich door panel (1) comprising two door panels (11) each having a door hole, characterized in that, The cold-bridge preventing window comprises a connecting body (2), a sealing ring plate (3) and two window assemblies (4), the two window assemblies (4) are arranged on the door holes of the two door plates (11) respectively through the connecting body (2), and the sealing ring plate (3) is arranged on the connecting body (2) or clamped between the connecting body (2) and the two window assemblies (4).

2. The cold-bridge prevention window according to claim 1, characterized in that, The connecting body (2) comprises two annular trays (21) fixedly connected, the two window assemblies (4) are arranged on the door holes of the two door plates (11) respectively through the two annular trays (21), the sealing ring plate (3) is arranged on the two annular trays (21) or between the two annular trays (21) and the window assemblies (4), and the two window assemblies (4) are located on the outer sides of the two door plates (11) respectively, and the sealing ring plate (3) and the two annular trays (21) are located between the two door plates (11).

3. The cold-bridge prevention window according to claim 2, characterized in that, The two annular trays (21) are oppositely arranged, a plurality of fixed columns (214) are uniformly arranged on each annular tray (21), and the two fixed columns (214) oppositely arranged on the two annular trays (21) are fixedly connected through a sleeve (5); each window assembly (4) comprises an annular window gland (41), an annular sealing retainer ring (42) and a main window (43), each annular window gland (41) presses the annular sealing retainer ring (42) on the outer side of the door plate (11) and is fixedly connected with the annular tray (21) located on the inner side of the door plate (11), and each annular window gland (41) presses the main window (43) on the annular sealing retainer ring (42); and the sealing ring plate (3) is arranged on the two annular trays (21) or clamped between the two annular trays (21) and the annular sealing retainer ring (42).

4. The cold-bridge prevention window according to claim 3, characterized in that, End faces of the two annular trays (21) are provided with embedded grooves (211) correspondingly, and the two ends of the sealing ring plate (3) are clamped into the two embedded grooves (211) respectively.

5. The cold-bridge prevention window according to claim 3, wherein The two annular trays (21) are provided with slotted holes (212), and the two ends of the sealing ring plate (3) are located at the two slotted holes (212); the inner side of each annular sealing retainer ring (42) is provided with a protrusion extending downward and inclined; and each protrusion abuts against the sealing ring plate (3) on the slotted hole (212).

6. The cold-bridge prevention window according to claim 3, wherein Each fixed column (214) is in a convex structure, and the two fixed columns (214) oppositely arranged on the two annular trays (21) are clamped into the two ends of the sleeve (5) respectively.

7. The cold-bridge prevention window according to claim 3, wherein A plurality of door holes (111) are uniformly arranged on each door plate (11), and the door holes (111) are arranged in a ring shape with the door hole as the center; a plurality of through holes are uniformly arranged on the positions corresponding to the door holes (111) of each annular window gland (41) and annular sealing retainer ring (42); a plurality of screw grooves (213) are uniformly arranged on the positions corresponding to the door holes (111) of each annular tray (21); and the through holes on the annular window gland (41), the through holes on the annular sealing retainer ring (42), the door holes (111) and the screw grooves (213) are fixedly connected through screws (6).

8. The cold-bridge prevention window according to claim 7, characterized in that, Each of the annular sealing check rings (42) is clamped on the outer side of the door hole of the door plate (11), the central position of each of the annular sealing check rings (42) is provided with a sunken groove (421), the lower surface of each of the main view windows (43) is provided with a third ring groove (431), each of the third ring grooves (431) is clamped on the sunken groove (421), the lower surface of each of the annular view window glands (41) is provided with a first ring groove (411) and a second ring groove (412), each of the first ring grooves (411) is located on the outer side of the annular sealing check ring (42), the outer side of each of the first ring grooves (411) and the annular sealing check ring (42) is provided with a through hole, and each of the second ring grooves (412) is located on the upper surface of the main view window (43).

9. The cold-bridge prevention window according to claim 3, wherein, The middle part of each of the main view windows (43) is provided with an outwardly protruding arc shape.

10. The cold-bridge prevention window according to claim 3, wherein Each of the annular trays (21) comprises a ring plate and a plurality of outer expansion plates uniformly arranged on the ring plate in the circumferential direction of the ring plate, the ring plate is sequentially provided with an inner embedding groove (211) and a slot (212) from inside to outside, the top of the fixed column (214) is fixed to the bottom of the outer expansion plate, and the outer expansion plate and the fixed column (214) are provided with screw grooves (213).

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