An energy-saving building exterior casement window with safety guardrail and mosquito-proof function

Abstract

The present invention relates to an energy-saving exterior casement window with safety guardrail and mosquito-proof function, comprising a door and window frame, a door and window leaf, and a guardrail. One end of the door and window leaf is hinged with one side of the door and window frame. A detachable invisible screen is arranged on the door and window frame. The invisible screen comprises a screen, a screen leaf handle and a reel respectively arranged on the left and right sides of the screen, and a sliding chain respectively arranged on the upper and lower sides of the screen. The inner sides of the upper and lower sides of the door and window frame are both provided with a slide rail corresponding to the sliding chain. A locking strip is arranged at the end of the screen leaf handle, and is elastically locked in cooperation with a strip-shaped piece arranged on the middle stile. The present invention has the characteristics of mosquito-proof, anti-falling, glass can be installed inside, and low cost.

Description

Technical Field

[0001] The invention relates to a building energy-saving and heat-insulating external casement window, and in particular to a structure in which an opening window is provided with a detachable invisible anti-mosquito screen window, a detachable anti-falling guardrail, and a lower fixed window capable of installing a guardrail. Background Art

[0002] The energy-saving exterior casement windows used in existing engineering fields have only the functions of opening, closing and energy saving of doors and windows, and no other functions, such as: mosquito prevention function, no child falling prevention function at the opening part, and no guardrail function for fixed windows.

[0003] In order to comply with the completion acceptance standards stipulated in the "Residential Design Code" (GB50096-2011), existing building energy-saving casement windows need to be equipped with zinc-steel guardrails before completion acceptance can be processed; after the zinc-steel guardrails are installed, indoor space is occupied; the hollow glass of external casement windows generally adopts outdoor installation technology, which poses hidden dangers to the safety of construction workers and the risk of glass falling from buildings; the use of conversion frames can realize the interior installation of hollow glass, but it significantly increases the cost of aluminum alloy doors and windows.

[0004] Due to the above-mentioned problems and design flaws, after most developers deliver houses to owners through completion acceptance, because the doors and windows installed by the developers do not have the above-mentioned functions, the owners "after receiving the house keys" begin to remove old windows for new ones, and remove the zinc steel guardrails that are not beautiful and occupy indoor space. In addition to the ventilation function of the opening fan, it is necessary to replace it with "system doors and windows" with "mosquito-proof screen fans or child-proof guardrails" with personalized needs. In addition, in order to realize the mosquito-proof screen fans and child-proof guardrails, "system doors and windows" require the selection of aluminum profiles with a wider series of scales (cross-section width). The specifications of common system windows are at least between 90mm and 145mm series or larger ranges of scales to achieve the above functions. Therefore, the cost of system doors and windows is generally high, generally between 800-1800 yuan / square meter, which is difficult for ordinary families, especially working-class families, to afford. Summary of the invention

[0005] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology, and to provide a building energy-saving external casement door and window structure with the functions of mosquito prevention, falling prevention, internal glass installation and low cost.

[0006] The technical solution of the present invention is to construct an energy-saving exterior casement window with safety guardrail and mosquito-proof function, comprising a door and window frame, a door and window leaf, and a guardrail. One end of the door and window leaf is hinged with one side of the door and window frame. A detachable invisible screen is arranged on the door and window frame. The invisible screen comprises a screen, a screen leaf handle and a reel respectively arranged on the left and right sides of the screen, and a sliding chain respectively arranged on the upper and lower sides of the screen. The inner sides of the upper and lower sides of the door and window frame are both provided with sliding rails corresponding to the sliding chain. The upper and lower ends of the screen leaf handle are respectively provided with handle heads corresponding to the sliding rails. The reel comprises a screen reel box, a shaft cylinder and Two yarn drum covers, the yarn drum covers are arranged at both ends of the yarn drum box and are respectively provided with relative fixed rotating shafts and movable rotating shafts, a torsion spring kit is arranged between the fixed rotating shaft and the movable rotating shaft, the shaft cylinder is sleeved outside the torsion spring kit and is only fixed to one end of the torsion spring in the torsion spring kit, the side of the yarn drum box is open, at least one first clamping groove is arranged on the shaft cylinder, one side of the yarn net is clamped in one of the first clamping grooves through a clamping rubber strip, a crank is arranged at the end of the movable rotating shaft, and a first limiting hole is arranged on the side of the end, and the yarn drum cover connected to the movable rotating shaft is provided with a second limiting hole corresponding to the first limiting hole;

[0007] The side of the yarn box facing away from the opening is connected to an outer frame strip, and the outer frame strip is connected to the door and window frame. The door and window frame is also provided with an inner frame strip, which is located on the indoor side and in front of the yarn cover (located on the indoor side). A guide roller is provided between the inner frame strip and the shaft tube, and the guide roller is located on the extension line of the activity track of the yarn fan handle;

[0008] The end of the inner frame clip is connected to the guardrail via a locking rubber strip;

[0009] The handle of the gauze fan is L-shaped as a whole, one side of the L-shape is a first handle, and the other side is provided with a recess forming a second handle, and the end of the second handle away from the first handle is connected to the gauze net;

[0010] The sash frame and glass of the door and window sash can be embedded between the door and window frame and the middle stile, and a limit strip is provided on one side of the sash frame;

[0011] A locking strip is arranged at the L-shaped corner of the yarn fan handle, and a strip piece with a groove corresponding to the locking strip is arranged on the middle stile opposite to the yarn tube box, and the locking strip can be elastically locked with the strip piece.

[0012] A plug-and-play lock is also arranged between the gauze fan handle and the middle stile.

[0013] The locking rubber strip is in an inverted eight-shaped shape as a whole, with a closed bottom, and opposite first enclosing protrusions are arranged on the inner sides of the two feet, and second card grooves concave from the outside to the inside are respectively arranged at the ends of the two feet away from each other; a storage groove is arranged on the inner frame card strip to accommodate the locking rubber strip, and a second enclosing protrusion is arranged on the storage groove to clamp the second card groove; a plug with a bulged end is arranged on the guardrail, and the plug can be clamped in the locking rubber strip by the first enclosing protrusion.

[0014] The connection side between the inner frame clip strip and the locking rubber strip is connected to the door and window frame via a spring pin.

[0015] The handle head includes a slider and a fixing pin inserted into the second handle. The slider is provided with a slide rail groove cooperating with the slide rail. One end of the slider is provided with a third slot for accommodating a mesh, and a pin hole is provided for installing a pin to fix the mesh in the third slot.

[0016] The guardrail is connected to the door and window frames or the middle wall by locking rubber strips.

[0017] A four-way profile is arranged on the middle stile, and a pair of left-facing tongues 49 are arranged on the left side of the four-way profile for connecting with the middle stile. A storage groove for accommodating a locking rubber strip is arranged on the upper part of the four-way profile for connecting with the guardrail. A downward rubber strip installation groove is arranged on the right side of the four-way profile for installing a bread rubber strip for sealing with the door and window sashes. A right-facing strip installation groove is arranged at the bottom of the four-way profile for installing a strip with a groove so that it cooperates with a fixing pin to fix the screen sash handle.

[0018] One of the pair of latches of the four-way profile is located at the upward extension of the four-way profile, and a baffle with an arc is arranged on the frame of the guardrail, so that when the plug on the frame of the guardrail is inserted downward into the storage slot, the baffle covers the edge of the middle wall.

[0019] The cross section of the strip 50 is a shape in which a positive E and a negative E are opposite and connected at the bottom, and two symmetrical barbs 54 pointing in the direction of the opening are arranged on its outer side. The strip installation groove 51 is U-shaped, and barb grooves 55 matching with the barbs 54 are arranged on the inner sides of both sides of the opening.

[0020] The gauze is a stainless steel gauze.

[0021] Advantages and beneficial effects of the present invention:

[0022] Without increasing the width of the aluminum series, i.e. the width of the aluminum cross section, or the amount of aluminum used for doors and windows, and under the premise of the original commonly used windows below the 70 series (such as the 50, 55, 60, 65 series, etc.), the present invention can realize the "multi-functions" of doors and windows, including (1) invisible mosquito-proof window function, (2) opening window child falling-prevention function, and (3) fixed window guardrail function. The invention has the remarkable characteristics of being assembled and detachable. The invisible mosquito-proof screen window and child falling-prevention guardrail can be "detached" for easy maintenance and convenient fire rescue.

[0023] The advantages are: 1. When the multifunctional doors and windows of the present invention are adopted, since the fixed window guardrail is integrated with the doors and windows, the developer or the construction party does not need to install the zinc steel guardrail to handle the completion acceptance, the developer saves the cost and the user saves the use of indoor space; 2. The opening part is provided with a child anti-falling guardrail, and the user does not need to install a "stainless steel anti-theft window" separately. When a fire occurs in a high-rise building, the stainless steel anti-theft window is not conducive to firefighting and rescue. At present, many large cities have banned the installation of "stainless steel anti-theft windows" outdoors. The "child anti-falling guardrail" of the present invention is "detachable", and when a fire occurs and rescue is needed, the firefighters do not need to " Special window-breaking tool", firefighters can push hard from the outside to the inside to open the children's anti-fall guardrail and enter the room for rescue; when the hardware, hinges, and invisible anti-mosquito screens of the opening sash need to be replaced or repaired, adults can pull them inward with force to exceed the deformation limit of the clamping strip of the EPDM butterfly-shaped rubber strip, and then the guardrail can be removed. This "removable" anti-fall guardrail is designed for adults and cannot be removed by children's strength; 3. An invisible screen is installed at the opening part to solve the problem that the opening sash of the engineering window has no anti-mosquito screen function, and also solves the embarrassment that the invisible screen cannot use stainless steel mesh to prevent rat bites.

[0024] The adoption of the present invention can achieve that the developer does not increase the cost, and the user no longer needs to replace the old window with a new one due to the single function of the door and window, thus saving the developer or construction unit cost and the user's window replacement cost. The present invention integrates energy saving, environmental protection, and saving social resources, reduces the repeated production of aluminum materials, reduces carbon dioxide emissions, reduces noise pollution, reduces sewage discharge pollution, eliminates safety hazards, and ultimately saves the already very tight social resources. The inner side of the frame of the guardrail is basically in the same vertical plane as the inner side of the window frame, which is beautiful and does not occupy the indoor area. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0026] Figure 2 yes Figure 1 Middle AA section view.

[0027] Figure 3 yes Figure 1 Middle BB cross-section.

[0028] Figure 4 This is an exploded diagram of the structure of the invisible screen.

[0029] Figure 5 This is a schematic diagram of the invisible screen window being closed and the doors and windows being opened.

[0030] Figure 6 This is a schematic diagram of the invisible screen window in the open state (doors and windows are not drawn).

[0031] Figure 7 Schematic diagram of the structure of the four-way profile in the embodiment.

[0032] Figure 8 yes Figure 7 Schematic diagram of the installation relationship between the middle strip and the strip mounting groove. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is considered to be “disposed on” another element, it may be directly disposed on or connected to the other element or there may be an intermediate element at the same time.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification are only for describing specific implementation purposes and are not intended to limit the present invention.

[0036] Example 1

[0037] like Figure 1-6As shown, an energy-saving exterior casement window with safety guardrail and mosquito-proof function, comprising a door and window frame 1, a door and window leaf 2, and a guardrail 3. One end of the door and window leaf 2 is hinged to one side of the door and window frame 1 by a hinge, and a detachable invisible screen 4 is arranged on the door and window frame. The invisible screen 4 comprises a stainless steel screen 5, a screen leaf handle 6 and a reel 7 respectively arranged on the left and right sides of the screen 5, and a sliding chain 8 respectively arranged on the upper and lower sides of the screen 5. The inner sides of the upper and lower sides of the door and window frame 1 are both provided with sliding rails 9 corresponding to the sliding chain 8, and the upper and lower ends of the screen leaf handle 6 are respectively provided with handle heads 10 corresponding to the sliding rails 9. The reel 7 comprises a yarn drum box 11, a shaft drum 12 and two yarn drum covers 13. The yarn drum covers 13 are arranged at both ends of the yarn drum box 11 and are respectively provided with relative fixed rotating shafts 14 and movable rotating shafts 43, and a torsion spring is arranged between the fixed rotating shaft 14 and the movable rotating shaft 43. The kit 44, the shaft cylinder 12 is sleeved outside the torsion spring kit 44 and is only fixed to one end of the torsion spring 41 in the torsion spring kit 44, the side of the yarn tube box 11 is open, and three first slots 15 are arranged on the shaft cylinder 12, one side of the yarn mesh 5 is clamped in one of the first slots 15 through a clamping rubber strip 46, a crank 17 is arranged at the end of the movable shaft 43, and a first limiting hole 56 is arranged on the side of the end, and the yarn tube cover 13 connected to the movable shaft 43 is provided with a second limiting hole corresponding to the first limiting hole 56, when the crank 17 drives the movable shaft 43 to rotate until the first limiting hole 56 is aligned with the second limiting hole, a screw or an "open pin" can be inserted into the first limiting hole 56 and the second limiting hole to fix it, so as to adjust the torsion of the torsion spring 41, and an arrow indicating whether the first limiting hole and the second limiting hole are aligned can also be arranged on the movable shaft 43 and the corresponding yarn tube cover 13;

[0038] The side of the yarn box 11 facing away from the opening is connected to an outer frame strip 18, and the outer frame strip 18 is connected to the door and window frame 1. The door and window frame 1 is also provided with an inner frame strip 19, which is located on the indoor side and in front of the yarn tube cover 13 (located on the indoor side). A guide roller 45 is provided between the inner frame strip 19 and the shaft cylinder 12, and the guide roller 45 is located on the extension line of the activity track of the yarn fan handle 6;

[0039] The end of the inner frame clip strip 19 is connected to the guardrail 3 via a locking rubber strip 20;

[0040] The gauze fan handle 6 is L-shaped as a whole, one side of the L-shape is a first handle 22, and the other side is provided with a recess forming a second handle 23, and the end of the second handle 23 away from the first handle 22 is connected to the gauze 5;

[0041] A locking strip 24 is provided at the L-shaped corner of the yarn fan handle 6, and a strip 50 with a groove corresponding to the locking strip 24 is provided on the middle stile 25 opposite to the yarn tube box 11, and the locking strip 24 can be elastically locked with the strip 50. The sash frame and glass of the door and window sash 2 can be embedded between the door and window frame 1 and the middle stile 25, and a limit strip 27 is provided on one side of the sash frame.

[0042] The locking rubber strip 20 is in the shape of an inverted figure eight, with a closed bottom (the direction here is based on the attached Figure 3 Taking the figure drawn therein as an example, the installation direction in actual application is not limited), the inner sides of the two feet are provided with opposite first enclosing protrusions 28, and the ends of the two feet away from each other are respectively provided with second card grooves 29 concave from the outside to the inside; the inner frame card strip 19 is provided with a storage groove 30 to accommodate the locking rubber strip 20, and the storage groove 30 is provided with a second enclosing protrusion 31 that clamps the second card groove 29; the guardrail 3 is provided with a plug 32 with a bulged end, and the plug 32 can be clamped in the locking rubber strip 20 by the first enclosing protrusion 28.

[0043] The connection side between the inner frame clip strip 19 and the locking rubber strip 20 is connected to the door and window frame 1 via a spring pin 33 .

[0044] The handle head 10 includes a slider 39 and a fixing pin 34 inserted into the second handle 23. The slider 39 is provided with a slide rail groove 35 that cooperates with the slide rail 9. One end of the slider 39 is provided with a third slot 36 for accommodating the gauze 5, and a pin hole 37 is provided for installing a pin to fix the gauze 5 in the third slot 36.

[0045] The guardrail 3 is connected to the door and window frame 1 or the middle stile 25 via a locking rubber strip 20 .

[0046] like Figure 7 As shown, a four-way profile 47 is provided on the middle mullion 25, a pair of left-facing latches 49 are provided on the left side of the four-way profile 47 for connecting with the middle mullion 25, a storage groove 30 for accommodating the locking rubber strip 20 is provided on the upper portion of the four-way profile 47 for connecting with the guardrail 3, a downward rubber strip installation groove 51 is provided on the right side of the four-way profile 47 for installing a bread rubber strip 48 for sealing with the door and window sashes, and a right-facing strip member installation groove 52 is provided at the bottom of the four-way profile 47 for installing the strip member 50 with a groove, so that it cooperates with the fixing pin 24 to fix the screen sash handle 6. One of the pair of latches 49 of the four-way profile 47 is located at the upward extension of the four-way profile 47, and a baffle 53 with an arc is provided on the frame of the guardrail 3, so that when the plug 32 on the frame of the guardrail 3 is inserted downward into the storage groove 30, the baffle 53 covers the edge of the middle wall 25, and it is in the same plane with the window frame on the indoor surface, and can be angled at 45 degrees, which is beautiful.

[0047] like Figure 8As shown, the cross-section of the strip 50 is a shape in which a positive E and a negative E are opposite and connected at the bottom, and two symmetrical barbs 54 pointing in the direction of the opening are arranged on the outer side thereof, and the strip mounting groove 51 is U-shaped, and barb grooves 55 matching with the barbs 54 are arranged on the inner sides of both sides of the opening.

[0048] The technical problem to be solved by the present invention is mainly that in the field of housing and construction engineering, the existing energy-saving casement doors and windows in the real estate construction field (houses built by developers or investors) generally adopt 50-80 series. Due to the limitation of the cross-sectional width, the aluminum door and window profiles between the 50-80 series only realize the "opening and closing" functions of the opening leaf, and do not have the anti-mosquito function. The opening leaf part does not have the "child falling prevention" function, and the fixed window part does not have the protective railing function. It is necessary to add zinc steel protective railings to complete the acceptance. Hollow glass generally adopts outdoor installation technology, which has safety hazards such as personnel safety risks and glass falling risks. When the "conversion frame aluminum profile" is used, the hollow glass can be installed inside, but the cost of aluminum alloy doors and windows is significantly increased.

[0049] The frame material of the thermal insulation casement window uses the same mold for indoor and outdoor surfaces, and the stile material uses the same mold for indoor and outdoor surfaces. This design can reduce the main profile aluminum mold, reduce inventory varieties, and improve aluminum material utilization;

[0050] The groove width of the frame material, the middle mullion material, and the sash material is designed to be a hinge groove of uniform size (K groove or C groove), which facilitates the common glass pressing lines of fixed windows and opening sashes, reduces the glass pressing line aluminum profile molds, reduces the inventory of glass pressing line varieties, and improves the utilization rate of glass pressing line aluminum materials.

[0051] This design can also make the main aluminum profiles of inward-opening windows and outward-opening windows common, that is, they can be opened inward or outward. Fixed glass can realize the interior installation of hollow glass without adding a conversion frame, saving aluminum.

[0052] The sliding mechanism (slide rail, vertical frame, etc.) of the invisible screen window can be made of the same profile, with plastic slide grooves embedded inside. The upper and lower plastic handle heads are provided at both ends of the handle in opposite directions. The heads are provided with blocking blocks to limit the hidden screen from entering the screen box after it shrinks to a suitable position. The plastic heads are assembled at both ends of the aluminum material of the handle to form the handle of the invisible screen window. The plastic heads are provided with sliders and small holes, and the small holes are used to fix the screen. The slider is used to move in the slideway of the upper and lower tracks to achieve the stretching and contraction of the screen window. Since the upper and lower handle head sliders enter the upper and lower slide grooves and the left or right hidden screen has a lock strip, it can not only prevent the screen from wrinkling, but also prevent the wind from blowing the screen away, so as to achieve the purpose of mosquito prevention, and also play a role in sealing and preventing the handle from rebounding.

[0053] When the invisible screen window is in the retracted and static state, the screen fan handle is blocked by the inner frame strip and cannot be used. At this time, the first handle blocks the screen tube box to prevent the screen fan handle from further retracting. When in use, the first handle is the traction handle, and the invisible screen is gently pulled out until it leaves the inner frame strip and is exposed. At this time, the concave second handle is the normal "handle".

[0054] The connection between the invisible screen mesh and the screen tube and the screen fan handle is embedded, which solves the embarrassment that the invisible screen mesh in the current market can only be made of nylon mesh and adhered to the screen tube with double-sided tape. The present invention can use stainless steel screen mesh to make invisible screen windows to achieve the purpose of preventing rats from biting.

[0055] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. An energy-saving exterior casement window with safety guardrail and mosquito-proof function, characterized in that: The window frame comprises a door and window frame, a door and window leaf, and a guardrail, wherein one end of the door and window leaf is hinged to one side of the door and window frame, and a detachable invisible screen is arranged on the door and window frame, the invisible screen comprises a screen, a screen leaf handle and a reel respectively arranged on the left and right sides of the screen, and sliding chains respectively arranged on the upper and lower sides of the screen, the inner sides of the upper and lower sides of the door and window frame are provided with slide rails corresponding to the sliding chains, and the upper and lower ends of the screen leaf handle are respectively provided with handle heads corresponding to the slide rails, the reel comprises a yarn drum box, an axis drum and two yarn drum covers, the yarn drum covers are arranged at both ends of the yarn drum box and are respectively provided with relative fixed rotating shafts and movable rotating shafts, a torsion spring kit is arranged between the fixed rotating shaft and the movable rotating shaft, the axis drum is sleeved outside the torsion spring kit and is only fixed to one end of the torsion spring in the torsion spring kit, the side of the yarn drum box is open, at least one first clamping groove is arranged on the axis drum, the yarn drum The lockhole has a hole that is located on the top of the hinge and abuts against the at least one cam portion of the hinge to allow the hinge to be moved in an orderly manner so that the hinge can extend out of the reach of the hinged door or window and a movement of the hinged door is achieved. The sash frame and glass of the door and window sash can be embedded between the door and window frame and the middle stile, and a limit strip is arranged on one side of the sash frame; a locking strip is arranged at the L-shaped corner of the yarn fan handle, and a strip with a groove corresponding to the locking strip is arranged on the middle stile opposite to the yarn tube box, and the locking strip can be elastically locked with the strip; the locking rubber strip is in an inverted eight-shaped shape as a whole, with a closed bottom, and the inner sides of the two feet are provided with relative first encircling protrusions, and the ends of the two feet away from each other are respectively provided with second card grooves concave from the outside to the inside; a storage groove is arranged on the inner frame card strip to accommodate the locking rubber strip, and a second encircling protrusion that clamps the second card groove is arranged on the storage groove; a plug with a swollen end is arranged on the guardrail, and the plug can be clamped in the locking rubber strip by the first encirclement; the connecting side of the inner frame card strip and the locking rubber strip is connected to the door and window frame through a spring pin; the handle head includes a slider and a fixing pin inserted into the second handle, and the slider is provided with A slide rail groove cooperates with the slide rail, and one end of the slider is provided with a third slot for accommodating a screen, and a pin hole is provided for installing a latch to fix the screen in the third slot; the screen is a stainless steel screen; when the invisible screen window is in a retracted and static state, the screen fan handle is blocked by the inner frame strip and cannot be used. At this time, the first handle clamps the screen tube box to prevent the screen fan handle from further retracting; when in use, the first handle is a traction handle, which gently pulls out the hidden screen until it leaves the inner frame strip and exposes the inner frame strip. At this time, the recessed second handle is a normal handle; the frame material of the external casement window is the same mold for indoor and outdoor use, and the stile material is the same mold for indoor and outdoor use, which is universal for both inside and outside; the outer frame strip is clamped with the side surface of the frame material outside the door and window frame and then spirally fixed, the inner frame strip is clamped with the side surface of the frame material inside the door and window frame, one side of the sash frame contacts the outdoor side of the outer frame strip, and the other side of the sash frame contacts the outdoor outside of the middle stile.

2. The building energy-saving exterior casement window with safety guardrail and mosquito-proof function according to claim 1 is characterized in that: A four-way profile is arranged on the middle mullion, and a pair of left-facing tongues are arranged on the left side of the four-way profile for connecting with the middle mullion, a storage groove for accommodating a locking rubber strip is arranged on the upper part of the four-way profile for connecting with the guardrail, a downward rubber strip installation groove is arranged on the right side of the four-way profile for installing a bread rubber strip for sealing with the door and window sashes, and a right-facing strip piece installation groove is arranged at the bottom of the four-way profile for installing a strip piece with a groove so that it cooperates with a fixing pin to fix the screen sash handle.

3. The building energy-saving exterior casement window with safety guardrail and mosquito-proof function according to claim 2 is characterized in that: One of the pair of latches of the four-way profile is located at the upward extension of the four-way profile, and a baffle with an arc is arranged on the frame of the guardrail, so that when the plug on the frame of the guardrail is inserted downward into the storage slot, the baffle covers the edge of the middle wall.

4. The building energy-saving exterior casement window with safety guardrail and mosquito-proof function according to claim 2 is characterized in that: The cross section of the strip is a shape of positive E and negative E facing each other and connected at the bottom, and two symmetrical barbs pointing in the direction of the opening are arranged on the outside. The strip installation groove is U-shaped, and barb grooves matching the barbs are arranged on the inner sides of both sides of the opening.

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