A narrow frame broken bridge double-inward-opening window system

Abstract

The utility model discloses a kind of narrow-frame broken bridge double-inward-opening window systems, including window frame and install the first fixed glass of window frame, inward-opening glass fan and inward-opening screen fan, window frame includes frame and vertical column, vertical column is connected with frame, inward-opening glass fan, first fixed glass are respectively installed in the two sides of vertical column, inward-opening screen fan is located in the outside of inward-opening glass fan;The section bar of frame and vertical column is all broken bridge aluminum;The width of the section bar of frame in indoor visual surface is 32-36mm;The width of the section bar of vertical column in indoor visual surface is 28-30mm.The double-inward-opening window system of the utility model is provided with inward-opening glass fan and inward-opening screen fan, forms double-inward-opening structure;Most section bars of this double-inward-opening window system are all broken bridge aluminum, with good heat preservation, heat insulation, sound insulation, sealing and other functions;The first middle stick, second middle stick and frame of this double-inward-opening window system are all designed with narrow frame body, the visual surface is narrow in indoor, visual effect is good, and light transmittance is good.

Description

Technical Field

[0001] This utility model relates to the field of door and window technology, and in particular to a narrow-frame thermally broken double inward opening window system. Background Technology

[0002] To achieve mosquito prevention, existing casement windows on the market now include a screen structure.

[0003] As shown in Chinese invention patent application CN 103388435 A, a window with integrated screen and window opening is disclosed, comprising a glass window sash, a screen sash, and a window frame. The glass window sash and screen sash are respectively fixed to the same side of the window frame. The glass window sash opens outwards, and the screen sash opens inwards. A lock is installed on the side away from where the screen sash is fixed to the window frame. This integrated window with integrated screen and window opening allows for a large opening area, provides anti-theft protection, and is also aesthetically pleasing. The aforementioned prior art achieves inward opening of the screen and outward opening of the glass window sash, but it has at least the following drawbacks:

[0004] 1. The profile is not a thermal break structure, resulting in poor sound and heat insulation.

[0005] 2. The profile has a large visible surface width indoors, which has defects such as narrow field of vision and poor light transmission;

[0006] 3. The glass fan opens outwards, making cleaning inconvenient and the hardware parts are easily damaged. Utility Model Content

[0007] The purpose of this invention is to provide a narrow-frame thermally broken double-inward window system, which can at least solve one of the above-mentioned problems.

[0008] According to one aspect of the present invention, a narrow-frame thermally broken double inward-opening window system is provided, including a window frame and a first fixed glass, an inward-opening glass sash, and an inward-opening screen sash installed on the window frame. The window frame includes a side frame and a vertical center post, the vertical center post being connected to the side frame, the inward-opening glass sash and the first fixed glass being installed on both sides of the vertical center post, and the inward-opening screen sash being located on the outside of the inward-opening glass sash.

[0009] Both the frame and the vertical central column profiles are made of thermally broken aluminum.

[0010] The visible width of the frame profile indoors is 32-36mm;

[0011] The visible width of the profile of the vertical central column inside the room is 28-30mm.

[0012] In some embodiments, the vertical center column includes a first mullion and a first adhesive strip. The first adhesive strip is disposed on the side of the first mullion away from the first fixed glass. The first fixed glass is installed in the space enclosed by the first mullion and the frame. The visible width of the first mullion in the room is 28-30mm.

[0013] In some embodiments, the first mullion includes a first profile, a second profile, and a first thermal break strip. The first profile is disposed on the outside of the second profile, and the first profile and the second profile are connected by a plurality of first thermal break strips. A first adhesive strip is installed on the first thermal break strip closest to the inward-opening glass sash. The inward-opening glass sash in the closed state is sealed with the first adhesive strip. The visible width of the second profile in the room is 28-30mm.

[0014] In some embodiments, the vertical central column further includes a first inner frame and a second inner frame. The first inner frame is fixedly connected to the first profile and has a first mounting groove for installing hardware for an inward-opening screen fan. The second inner frame is connected to the second profile and has a second mounting groove for installing hardware for an inward-opening glass fan.

[0015] In some embodiments, the frame includes a third profile, a fourth profile, a second thermal insulation strip, and a second adhesive strip. The third profile is disposed on the outside of the fourth profile, and the third profile and the fourth profile are connected by a plurality of second thermal insulation strips. The second adhesive strip is installed on the second thermal insulation strip closest to the inward-opening glass sash. The inward-opening glass sash in the closed state is sealed with the second adhesive strip. The visible width of the fourth profile in the room is 32-36mm.

[0016] The frame also includes a third inner frame and a fourth inner frame. The third inner frame is fixedly connected to the third profile and has a third mounting groove for installing hardware for inward-opening screen fans. The fourth inner frame is connected to the fourth profile and has a fourth mounting groove for installing hardware for inward-opening glass fans.

[0017] In some embodiments, the inward-opening glass sash includes a third glass, a fifth profile, a sixth profile, a third heat insulation strip, and a third adhesive strip. The fifth profile is fixedly connected to the third glass, and the sixth profile is sealed to the third glass by the third adhesive strip. The fifth profile is disposed on the outside of the sixth profile, and the fifth profile and the sixth profile are connected by a plurality of third heat insulation strips. A contact protrusion is formed on the third heat insulation strip furthest from the inward-opening glass sash. When the inward-opening glass sash is in the closed state, the contact protrusion contacts the first adhesive strip and the second adhesive strip.

[0018] The sixth profile has a seventh mounting groove for installing hardware for inward-opening glass fans.

[0019] In some implementations, when the inward-opening glass sash is closed, the first, second, and third thermal insulation strips, the first and second adhesive strips, and the third glass pane form a vertical isothermal structure. This design effectively blocks heat conduction, reduces heat exchange between indoors and outdoors, and gives the system numerous advantages such as strong thermal insulation, good sound insulation, energy efficiency, and a simple appearance.

[0020] In some embodiments, the narrow-frame thermally broken double inward-opening window system also includes a second fixed glass, and the window frame also includes a horizontal central column, the horizontal central column including a second mullion and a fourth sealing strip, the fourth sealing strip being disposed on the side of the second mullion away from the second fixed glass, and the second fixed glass being installed within the space formed by the first mullion, the second mullion and the frame together;

[0021] The second middle section includes the seventh profile, the eighth profile, and the fourth thermal insulation strip. The seventh profile is located on the outside of the eighth profile, and the seventh profile and the eighth profile are connected by several fourth thermal insulation strips. The fourth rubber strip is installed on the fourth thermal insulation strip closest to the inward-opening glass sash. The inward-opening glass sash in the closed state is sealed with the fourth rubber strip. The visible width of the eighth profile in the room is 28-30mm.

[0022] The horizontal central column also includes a fifth inner frame and a sixth inner frame. The fifth inner frame is fixedly connected to the seventh profile and has a fifth mounting groove for installing hardware for inward-opening screen fans. The sixth inner frame is connected to the eighth profile and has a sixth mounting groove for installing hardware for inward-opening glass fans.

[0023] In some implementations, when the inward-opening glass sash is closed, the second, third, and fourth thermal insulation strips, the second and fourth adhesive strips, and the third glass pane form a vertical isothermal structure. This design effectively blocks heat conduction, reduces heat exchange between indoors and outdoors, and gives the system numerous advantages such as strong thermal insulation and good sound insulation.

[0024] In some embodiments, the inward-opening screen fan includes a screen fan profile, a screen mesh, fasteners, a fifth adhesive strip, and a sixth adhesive strip. One end of the screen fan profile is movably connected to the frame or a vertical central column. The screen mesh is fixedly installed on the screen fan profile by fasteners. The fifth adhesive strip is installed on the screen fan profile and cooperates with the screen mesh. The sixth adhesive strip is installed on the screen fan profile and cooperates with the inward-opening glass fan.

[0025] The beneficial effects of this utility model are:

[0026] 1. This utility model provides a novel narrow-frame thermally broken double-inward-opening window system. The double-inward-opening window system is equipped with an inward-opening glass sash and an inward-opening screen sash, forming a double-inward-opening structure. The inward-opening glass sash opens inward, which is convenient for cleaning, has a large ventilation volume, higher safety, and a longer service life of hardware. The inward-opening screen sash opens inward, which is convenient for cleaning and maintenance.

[0027] 2. Most of the profiles in this double inward opening window system are made of thermally broken aluminum, which has good thermal insulation, sound insulation and sealing functions;

[0028] 3. The first and second mullions and the frame of this double inward opening window system all adopt a narrow frame design, resulting in a narrow visible area indoors, good visual effect, and good light transmission;

[0029] 4. Both the first and second center muzzles adopt a split-type center muzzle structure, which has high strength;

[0030] 5. This double-inward window system has a vertical isotherm structure, which provides strong heat insulation and good sound insulation.

[0031] In summary, the narrow-frame thermally broken double-inward-opening window system of this utility model has at least many advantages, such as easy cleaning, mosquito prevention, good visual effect, good light transmission, good overall structural strength, good safety performance, good water tightness, good air tightness, good wind pressure resistance, good sound insulation performance, and good thermal insulation performance. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a simplified front view of the overall structure of this utility model;

[0034] Figure 2 for Figure 1 The cross-sectional view along direction AB is shown below;

[0035] Figure 3 for Figure 1 The diagram shows the cross-sectional structure at point C.

[0036] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure at point D is shown.

[0037] Figure 5 for Figure 1 A schematic diagram of the cross-sectional structure at point E is shown.

[0038] Figure 6 for Figure 1 The diagram shows the cross-sectional structure at point F.

[0039] Figure 7 for Figure 1 A schematic diagram of the cross-sectional structure at point G is shown.

[0040] Figure 8 for Figure 1 The diagram shows a cross-sectional structure at point H.

[0041] Figures 1-8The reference numerals in the attached drawings are as follows: 1-Window frame; 2-First fixed glass; 3-Second fixed glass; 4-Inward-opening glass sash; 5-Inward-opening screen sash; 11-Frame; 12-Vertical center post; 13-Horizontal center post; 21-First glass; 22-Seventh sealing strip; 23-First pressure line; 31-Second glass; 32-Eighth sealing strip; 33-Second pressure line; 41-Third glass; 42-Fifth profile; 43-Sixth profile; 44-Third thermal break strip; 45-Third sealing strip; 51-Screen sash profile; 52-Screen mesh; 53-Fastener; 54-Fifth sealing strip; 55-Sixth sealing strip; 111-Third profile; 112-Fourth profile; 113-Second thermal break strip; 114-Second sealing strip; 115-Third inner frame. ; 116-Fourth inner frame; 121-First central mullion; 122-First rubber strip; 123-First inner frame; 124-Second inner frame; 131-Second central mullion; 132-Fourth rubber strip; 133-Fifth inner frame; 134-Sixth inner frame; 431-Seventh mounting groove; 441-Contact protrusion; 511-Eighth mounting groove; 115a-Third mounting groove; 116a-Fourth mounting groove; 121a-First profile; 121b-Second profile; 121c-First thermal insulation strip; 123a-First mounting groove; 124a-Second mounting groove; 131a-Seventh profile; 131b-Eighth profile; 131c-Fourth thermal insulation strip; 133a-Fifth mounting groove; 134a-Sixth mounting groove. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only some embodiments of this utility model, not all embodiments, and are used only to explain the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "both ends," "both sides," "bottom," and "top," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," "upper-level," "lower-level," "main," and "secondary," etc., are used for descriptive purposes only and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0046] Figure 1-8 The diagram schematically illustrates a narrow-frame thermally broken double-inward-opening window system according to one embodiment of the present invention.

[0047] like Figure 1-8 As shown, the narrow-frame thermal break double inward opening window system includes a window frame 1 and a first fixed glass 2, an inward opening glass sash 4, and an inward opening screen sash 5 installed on the window frame 1. The window frame 1 includes a side frame 11 and a vertical center post 12. The vertical center post 12 is connected to the side frame 11. The inward opening glass sash 4 and the first fixed glass 2 are respectively installed on both sides of the vertical center post 12. The inward opening screen sash 5 is located on the outside of the inward opening glass sash 4.

[0048] Both the frame 11 and the vertical center column 12 are made of thermally broken aluminum.

[0049] The visible width L1 of the frame 11 profile is 32-36mm indoors;

[0050] The visible width L2 of the profile of the vertical center column 12 inside the room is 28-30mm.

[0051] In this example, the vertical center column 12 includes a first center mullion 121 and a first adhesive strip 122. The first adhesive strip 122 is disposed on the side of the first center mullion 121 away from the first fixed glass 2. The first fixed glass 2 is installed in the space enclosed by the first center mullion 121 and the frame 11. The visible width L2 of the first center mullion 121 in the room is 28-30mm.

[0052] In this example, the first mullion 121 includes a first profile 121a, a second profile 121b, and a first thermal insulation strip 121c. The first profile 121a is disposed on the outside of the second profile 121b, and the first profile 121a and the second profile 121b are connected by a plurality of first thermal insulation strips 121c. A first adhesive strip 122 is installed on the first thermal insulation strip 121c closest to the inward-opening glass sash 4. The inward-opening glass sash 4 in the closed state is sealed with the first adhesive strip 122. The visible width L2 of the second profile 121b in the room is 28-30mm.

[0053] Preferably, the visible width L2 of the second profile 121b in the room is 28mm.

[0054] In this example, the vertical central column 12 also includes a first inner frame 123 and a second inner frame 124. The first inner frame 123 is fixedly connected to the first profile 121a and has a first mounting groove 123a for installing hardware for the inward-opening screen fan 5. The second inner frame 124 is connected to the second profile 121b and has a second mounting groove 124a for installing hardware for the inward-opening glass fan 4.

[0055] In this example, the frame 11 includes a third profile 111, a fourth profile 112, a second heat insulation strip 113, and a second adhesive strip 114. The third profile 111 is disposed on the outside of the fourth profile 112, and the third profile 111 and the fourth profile 112 are connected by a plurality of second heat insulation strips 113. The second adhesive strip 114 is installed on the second heat insulation strip 113 closest to the inward-opening glass sash 4. The inward-opening glass sash 4 in the closed state is sealed with the second adhesive strip 114. The visible width L1 of the fourth profile 112 in the room is 32-36mm.

[0056] As a preferred embodiment, the visible width L1 of the fourth profile 112 indoors is 32mm.

[0057] The frame 11 includes a third inner frame 115 and a fourth inner frame 116. The third inner frame 115 is fixedly connected to the third profile 111 and has a third mounting groove 115a for installing hardware for the inward-opening screen fan 5. The fourth inner frame 116 is connected to the fourth profile 112 and has a fourth mounting groove 116a for installing hardware for the inward-opening glass fan 4.

[0058] In this example, the inward-opening glass sash 4 includes a third glass 41, a fifth profile 42, a sixth profile 43, a third heat insulation strip 44, and a third adhesive strip 45. The fifth profile 42 is fixedly connected to the third glass 41, and the sixth profile 43 is sealed to the third glass 41 through the third adhesive strip 45. The fifth profile 42 is located on the outside of the sixth profile 43, and the fifth profile 42 and the sixth profile 43 are connected by a plurality of third heat insulation strips 44. A contact protrusion 441 is formed on the third heat insulation strip 44 furthest from the inward-opening glass sash 4. When the inward-opening glass sash 4 is in the closed state, the contact protrusion 441 contacts the first adhesive strip 122 and the second adhesive strip 114.

[0059] The sixth profile 43 has a seventh mounting groove 431 for installing hardware for the inward-opening glass sash 4.

[0060] In this example, when the inward-opening glass sash 4 is in the closed state, the first thermal insulation strip 121c, the second thermal insulation strip 113, the third thermal insulation strip 44, the first adhesive strip 122, the second adhesive strip 114, and the third glass 41 form a vertical isotherm structure. Therefore, this design effectively blocks heat conduction, reduces heat exchange between indoors and outdoors, and gives the system many advantages such as strong thermal insulation, good sound insulation, energy efficiency, and a simple appearance.

[0061] In this example, the narrow-frame thermal break double inward opening window system also includes a second fixed glass 3, and the window frame 1 also includes a horizontal central column 13. The horizontal central column 13 includes a second mullion 131 and a fourth sealing strip 132. The fourth sealing strip 132 is disposed on the side of the second mullion 131 away from the second fixed glass 3. The second fixed glass 3 is installed in the space formed by the first mullion 121, the second mullion 131 and the frame 11.

[0062] In this example, the second mullion 131 includes a seventh profile 131a, an eighth profile 131b, and a fourth thermal insulation strip 131c. The seventh profile 131a is located on the outside of the eighth profile 131b, and the seventh profile 131a and the eighth profile 131b are connected by several fourth thermal insulation strips 131c. The fourth adhesive strip 132 is installed on the fourth thermal insulation strip 131c closest to the inward-opening glass sash 4. The inward-opening glass sash 4 in the closed state is sealed with the fourth adhesive strip 132. The visible width L3 of the eighth profile 131b in the room is 28-30mm.

[0063] As a preferred embodiment, the visible width L3 of the eighth profile 131b in the indoor environment is 28mm.

[0064] In this example, the horizontal central column 13 also includes a fifth inner frame 133 and a sixth inner frame 134. The fifth inner frame 133 is fixedly connected to the seventh profile 131a and has a fifth mounting groove 133a for installing hardware for the inward-opening screen fan 5. The sixth inner frame 134 is connected to the eighth profile 131b and has a sixth mounting groove 134a for installing hardware for the inward-opening glass fan 4.

[0065] In this example, when the inward-opening glass sash 4 is in the closed state, the second thermal insulation strip 113, the third thermal insulation strip 44, the fourth thermal insulation strip 131c, the second adhesive strip 114, the fourth adhesive strip 132, and the third glass 41 form a vertical isotherm structure. Therefore, this design effectively blocks heat conduction, reduces heat exchange between indoors and outdoors, and gives the system many advantages such as strong thermal insulation and good sound insulation.

[0066] In this example, the inward-opening screen fan 5 includes a screen fan profile 51, a screen 52, a fastener 53, a fifth adhesive strip 54, and a sixth adhesive strip 55. One end of the screen fan profile 51 is movably connected to the frame 11 or the vertical central column 12. The screen 52 is fixedly installed on the screen fan profile 51 by the fastener 53. The fifth adhesive strip 54 is installed on the screen fan profile 51 and cooperates with the screen 52. The sixth adhesive strip 55 is installed on the screen fan profile 51 and cooperates with the inward-opening glass fan 4.

[0067] An eighth mounting groove 511 for installing hardware is provided at the end of the screen profile 51 away from the screen 52.

[0068] The first mounting slot 123a, the second mounting slot 124a, the third mounting slot 115a, the fourth mounting slot 116a, the fifth mounting slot 133a, the sixth mounting slot 134a, the seventh mounting slot 431 and the eighth mounting slot 511 in this embodiment can realize the concealed installation of most hardware parts, so as to achieve the purpose of making reasonable use of space and aesthetic appearance.

[0069] In this embodiment, the first fixed glass 2 includes a first glass 21, a seventh adhesive strip 22, and a first pressure line 23. The first glass 21 is installed within the space formed by the frame 11 and the first central mullion 121 via the seventh adhesive strip 22. The first pressure line 23 is installed on the second profile 121b or the fourth profile 112 and cooperates with the first glass 21. The second fixed glass 3 includes a second glass 31, an eighth adhesive strip 32, and a second pressure line 33. The second glass 31 is installed within the space formed by the frame 11, the first central mullion 121, and the second central mullion 131 via the eighth adhesive strip 32. The second pressure line 33 is installed on the second profile 121b, the fourth profile 112, or the eighth profile 131b and cooperates with the second glass 31.

[0070] Preferably, in this embodiment, the first glass 21, the second glass 31, and the third glass 41 are all made of 5+24Ar+5 tempered insulated glass.

[0071] Preferably, the first adhesive strip 122, the second adhesive strip 114, and the fourth adhesive strip 132 all contact and cooperate with the third thermal insulation strip 44, and the specific contact method can be line contact or surface contact. This significantly improves the overall sealing performance, sound insulation, and heat insulation performance of the inward-opening glass sash 4 when it is closed.

[0072] The internally opening glass fan 4 of this utility model can be configured as an internally opening type or an internally opening and internally tilting type according to actual needs.

[0073] The advantages of this utility model's narrow-frame thermally broken double-inward-opening window system compared to existing technologies include at least the following:

[0074] The beneficial effects of this utility model are:

[0075] 1. This utility model provides a novel narrow-frame thermally broken double-inward-opening window system. The double-inward-opening window system is equipped with an inward-opening glass sash 4 and an inward-opening screen sash 5 to form a double-inward-opening structure. The inward-opening glass sash 4 opens inward, which is convenient for cleaning, has a large ventilation volume, higher safety, and a longer service life of hardware. The inward-opening screen sash 5 opens inward, which is convenient for cleaning and maintenance.

[0076] 2. Most of the profiles in this double inward opening window system are made of thermally broken aluminum, which has good thermal insulation, sound insulation and sealing functions;

[0077] 3. The first mullion 121, the second mullion 131, and the frame 11 of this double inward opening window system all adopt a narrow frame design, resulting in a narrow visible area indoors, good visual effect, and good light transmission.

[0078] 4. Both the first center muzzle 121 and the second center muzzle 131 adopt a split-type center muzzle structure, which has high strength;

[0079] 5. This double-inward window system has a vertical isotherm structure, which provides strong heat insulation and good sound insulation.

[0080] In summary, the narrow-frame thermally broken double-inward-opening window system of this utility model has at least many advantages, such as easy cleaning, mosquito prevention, good visual effect, good light transmission, good overall structural strength, good safety performance, good water tightness, good air tightness, good wind pressure resistance, good sound insulation performance, and good thermal insulation performance.

[0081] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A narrow-frame thermally broken double inward-opening window system, characterized in that, The window frame includes a window frame (1) and a first fixed glass (2), an inward-opening glass sash (4), and an inward-opening screen sash (5) installed on the window frame (1). The window frame (1) includes a frame (11) and a vertical center post (12). The vertical center post (12) is connected to the frame (11). The inward-opening glass sash (4) and the first fixed glass (2) are respectively installed on both sides of the vertical center post (12). The inward-opening screen sash (5) is located on the outside of the inward-opening glass sash (4). The profiles of the frame (11) and the vertical central column (12) are both made of thermally broken aluminum. The visible width of the frame (11) profile inside the room is 32-36mm; The visible width of the profile of the vertical central column (12) inside the room is 28-30mm.

2. The narrow-frame thermal break double inward window system according to claim 1, characterized in that, The vertical central column (12) includes a first central mullion (121) and a first adhesive strip (122). The first adhesive strip (122) is disposed on the side of the first central mullion (121) away from the first fixed glass (2). The first fixed glass (2) is installed in the space enclosed by the first central mullion (121) and the frame (11). The visible width of the first central mullion (121) in the room is 28-30mm.

3. The narrow-frame thermally broken double inward-opening window system according to claim 2, characterized in that, The first mullion (121) includes a first profile (121a), a second profile (121b), and a first thermal insulation strip (121c). The first profile (121a) is disposed on the outside of the second profile (121b), and the first profile (121a) and the second profile (121b) are connected by a plurality of first thermal insulation strips (121c). The first adhesive strip (122) is installed on the first thermal insulation strip (121c) closest to the inward-opening glass sash (4). The inward-opening glass sash (4) in the closed state is sealed with the first adhesive strip (122). The visible width of the second profile (121b) in the room is 28-30mm.

4. The narrow-frame thermally broken double inward-opening window system according to claim 3, characterized in that, The vertical central column (12) further includes a first inner frame (123) and a second inner frame (124). The first inner frame (123) is fixedly connected to the first profile (121a) and has a first mounting groove (123a) for installing hardware for the inward-opening screen fan (5). The second inner frame (124) is connected to the second profile (121b) and has a second mounting groove (124a) for installing hardware for the inward-opening glass fan (4).

5. The narrow-frame thermally broken double inward-opening window system according to claim 4, characterized in that, The frame (11) includes a third profile (111), a fourth profile (112), a second heat insulation strip (113), and a second adhesive strip (114). The third profile (111) is disposed on the outside of the fourth profile (112), and the third profile (111) and the fourth profile (112) are connected by a plurality of second heat insulation strips (113). The second adhesive strip (114) is installed on the second heat insulation strip (113) closest to the inward-opening glass sash (4). The inward-opening glass sash (4) in the closed state is sealed with the second adhesive strip (114). The visible width of the fourth profile (112) in the room is 32-36 mm. The frame (11) includes a third inner frame (115) and a fourth inner frame (116). The third inner frame (115) is fixedly connected to the third profile (111) and has a third mounting groove (115a) for installing hardware for the inward-opening screen fan (5). The fourth inner frame (116) is connected to the fourth profile (112) and has a fourth mounting groove (116a) for installing hardware for the inward-opening glass fan (4).

6. The narrow-frame thermally broken double inward-opening window system according to claim 5, characterized in that, The inward-opening glass sash (4) includes a third glass (41), a fifth profile (42), a sixth profile (43), a third heat insulation strip (44), and a third adhesive strip (45). The fifth profile (42) is fixedly connected to the third glass (41), and the sixth profile (43) is sealed to the third glass (41) through the third adhesive strip (45). The fifth profile (42) is located on the outside of the sixth profile (43), and the fifth profile (42) and the sixth profile (43) are connected by a plurality of the third heat insulation strips (44). A contact protrusion (441) is formed on the third heat insulation strip (44) furthest from the inward-opening glass sash (4). When the inward-opening glass sash (4) is in the closed state, the contact protrusion (441) of the inward-opening glass sash (4) is in contact with the first adhesive strip (122) and the second adhesive strip (114). The sixth profile (43) has a seventh mounting groove (431) for mounting hardware for the inward-opening glass sash (4).

7. The narrow-frame thermally broken double inward-opening window system according to claim 6, characterized in that, When the inward-opening glass sash (4) is in the closed state, the first heat insulation strip (121c), the second heat insulation strip (113), the third heat insulation strip (44), the first adhesive strip (122), the second adhesive strip (114), and the third glass (41) form a vertical isotherm structure.

8. The narrow-frame thermally broken double inward-opening window system according to claim 6, characterized in that, It also includes a second fixed glass (3), and the window frame (1) also includes a horizontal center post (13), the horizontal center post (13) includes a second mullion (131) and a fourth sealing strip (132), the fourth sealing strip (132) is disposed on the side of the second mullion (131) away from the second fixed glass (3), and the second fixed glass (3) is installed in the space formed by the first mullion (121), the second mullion (131) and the frame (11); The second mullion (131) includes a seventh profile (131a), an eighth profile (131b), and a fourth thermal insulation strip (131c). The seventh profile (131a) is disposed on the outside of the eighth profile (131b), and the seventh profile (131a) and the eighth profile (131b) are connected by a plurality of the fourth thermal insulation strips (131c). The fourth adhesive strip (132) is installed on the fourth thermal insulation strip (131c) closest to the inward-opening glass sash (4). The inward-opening glass sash (4) in the closed state is sealed with the fourth adhesive strip (132). The visible width of the eighth profile (131b) in the room is 28-30mm. The horizontal central column (13) also includes a fifth inner frame (133) and a sixth inner frame (134). The fifth inner frame (133) is fixedly connected to the seventh profile (131a) and has a fifth mounting groove (133a) for installing the hardware of the inward-opening screen fan (5). The sixth inner frame (134) is connected to the eighth profile (131b) and has a sixth mounting groove (134a) for installing the hardware of the inward-opening glass fan (4).

9. The narrow-frame thermal break double inward window system according to claim 8, characterized in that, When the inward-opening glass sash (4) is in the closed state, the second heat insulation strip (113), the third heat insulation strip (44), the fourth heat insulation strip (131c), the second adhesive strip (114), the fourth adhesive strip (132), and the third glass (41) form a vertical isotherm structure.

10. The narrow-frame thermal break double inward-opening window system according to any one of claims 1-9, characterized in that, The inward-opening screen fan (5) includes a screen fan profile (51), a screen (52), a fastener (53), a fifth adhesive strip (54), and a sixth adhesive strip (55). One end of the screen fan profile (51) is movably connected to the frame (11) or the vertical central column (12). The screen (52) is fixedly installed on the screen fan profile (51) by the fastener (53). The fifth adhesive strip (54) is installed on the screen fan profile (51) and cooperates with the screen (52). The sixth adhesive strip (55) is installed on the screen fan profile (51) and cooperates with the inward-opening glass fan (4).

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